Commit | Line | Data |
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8d318a50 | 1 | /* |
d49278e3 PF |
2 | * Copyright (C) Ericsson AB 2007-2008 |
3 | * Copyright (C) ST-Ericsson SA 2008-2010 | |
661385f9 | 4 | * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson |
767a9675 | 5 | * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson |
8d318a50 | 6 | * License terms: GNU General Public License (GPL) version 2 |
8d318a50 LW |
7 | */ |
8 | ||
b7f080cf | 9 | #include <linux/dma-mapping.h> |
8d318a50 LW |
10 | #include <linux/kernel.h> |
11 | #include <linux/slab.h> | |
f492b210 | 12 | #include <linux/export.h> |
8d318a50 LW |
13 | #include <linux/dmaengine.h> |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/delay.h> | |
c95905a6 | 17 | #include <linux/log2.h> |
7fb3e75e N |
18 | #include <linux/pm.h> |
19 | #include <linux/pm_runtime.h> | |
698e4732 | 20 | #include <linux/err.h> |
1814a170 | 21 | #include <linux/of.h> |
fa332de5 | 22 | #include <linux/of_dma.h> |
f4b89764 | 23 | #include <linux/amba/bus.h> |
15e4b78d | 24 | #include <linux/regulator/consumer.h> |
865fab60 | 25 | #include <linux/platform_data/dma-ste-dma40.h> |
8d318a50 | 26 | |
d2ebfb33 | 27 | #include "dmaengine.h" |
8d318a50 LW |
28 | #include "ste_dma40_ll.h" |
29 | ||
30 | #define D40_NAME "dma40" | |
31 | ||
32 | #define D40_PHY_CHAN -1 | |
33 | ||
34 | /* For masking out/in 2 bit channel positions */ | |
35 | #define D40_CHAN_POS(chan) (2 * (chan / 2)) | |
36 | #define D40_CHAN_POS_MASK(chan) (0x3 << D40_CHAN_POS(chan)) | |
37 | ||
38 | /* Maximum iterations taken before giving up suspending a channel */ | |
39 | #define D40_SUSPEND_MAX_IT 500 | |
40 | ||
7fb3e75e N |
41 | /* Milliseconds */ |
42 | #define DMA40_AUTOSUSPEND_DELAY 100 | |
43 | ||
508849ad LW |
44 | /* Hardware requirement on LCLA alignment */ |
45 | #define LCLA_ALIGNMENT 0x40000 | |
698e4732 JA |
46 | |
47 | /* Max number of links per event group */ | |
48 | #define D40_LCLA_LINK_PER_EVENT_GRP 128 | |
49 | #define D40_LCLA_END D40_LCLA_LINK_PER_EVENT_GRP | |
50 | ||
db72da92 LJ |
51 | /* Max number of logical channels per physical channel */ |
52 | #define D40_MAX_LOG_CHAN_PER_PHY 32 | |
53 | ||
508849ad LW |
54 | /* Attempts before giving up to trying to get pages that are aligned */ |
55 | #define MAX_LCLA_ALLOC_ATTEMPTS 256 | |
56 | ||
57 | /* Bit markings for allocation map */ | |
8a3b6e14 LJ |
58 | #define D40_ALLOC_FREE BIT(31) |
59 | #define D40_ALLOC_PHY BIT(30) | |
8d318a50 LW |
60 | #define D40_ALLOC_LOG_FREE 0 |
61 | ||
a7dacb68 LJ |
62 | #define D40_MEMCPY_MAX_CHANS 8 |
63 | ||
664a57ec | 64 | /* Reserved event lines for memcpy only. */ |
a2acaa21 LW |
65 | #define DB8500_DMA_MEMCPY_EV_0 51 |
66 | #define DB8500_DMA_MEMCPY_EV_1 56 | |
67 | #define DB8500_DMA_MEMCPY_EV_2 57 | |
68 | #define DB8500_DMA_MEMCPY_EV_3 58 | |
69 | #define DB8500_DMA_MEMCPY_EV_4 59 | |
70 | #define DB8500_DMA_MEMCPY_EV_5 60 | |
71 | ||
72 | static int dma40_memcpy_channels[] = { | |
73 | DB8500_DMA_MEMCPY_EV_0, | |
74 | DB8500_DMA_MEMCPY_EV_1, | |
75 | DB8500_DMA_MEMCPY_EV_2, | |
76 | DB8500_DMA_MEMCPY_EV_3, | |
77 | DB8500_DMA_MEMCPY_EV_4, | |
78 | DB8500_DMA_MEMCPY_EV_5, | |
79 | }; | |
664a57ec | 80 | |
29027a1e | 81 | /* Default configuration for physcial memcpy */ |
e43341ca | 82 | static const struct stedma40_chan_cfg dma40_memcpy_conf_phy = { |
29027a1e | 83 | .mode = STEDMA40_MODE_PHYSICAL, |
2c2b62d5 | 84 | .dir = DMA_MEM_TO_MEM, |
29027a1e | 85 | |
43f2e1a3 | 86 | .src_info.data_width = DMA_SLAVE_BUSWIDTH_1_BYTE, |
29027a1e LJ |
87 | .src_info.psize = STEDMA40_PSIZE_PHY_1, |
88 | .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL, | |
89 | ||
43f2e1a3 | 90 | .dst_info.data_width = DMA_SLAVE_BUSWIDTH_1_BYTE, |
29027a1e LJ |
91 | .dst_info.psize = STEDMA40_PSIZE_PHY_1, |
92 | .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL, | |
93 | }; | |
94 | ||
95 | /* Default configuration for logical memcpy */ | |
e43341ca | 96 | static const struct stedma40_chan_cfg dma40_memcpy_conf_log = { |
29027a1e | 97 | .mode = STEDMA40_MODE_LOGICAL, |
2c2b62d5 | 98 | .dir = DMA_MEM_TO_MEM, |
29027a1e | 99 | |
43f2e1a3 | 100 | .src_info.data_width = DMA_SLAVE_BUSWIDTH_1_BYTE, |
29027a1e LJ |
101 | .src_info.psize = STEDMA40_PSIZE_LOG_1, |
102 | .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL, | |
103 | ||
43f2e1a3 | 104 | .dst_info.data_width = DMA_SLAVE_BUSWIDTH_1_BYTE, |
29027a1e LJ |
105 | .dst_info.psize = STEDMA40_PSIZE_LOG_1, |
106 | .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL, | |
107 | }; | |
108 | ||
8d318a50 LW |
109 | /** |
110 | * enum 40_command - The different commands and/or statuses. | |
111 | * | |
112 | * @D40_DMA_STOP: DMA channel command STOP or status STOPPED, | |
113 | * @D40_DMA_RUN: The DMA channel is RUNNING of the command RUN. | |
114 | * @D40_DMA_SUSPEND_REQ: Request the DMA to SUSPEND as soon as possible. | |
115 | * @D40_DMA_SUSPENDED: The DMA channel is SUSPENDED. | |
116 | */ | |
117 | enum d40_command { | |
118 | D40_DMA_STOP = 0, | |
119 | D40_DMA_RUN = 1, | |
120 | D40_DMA_SUSPEND_REQ = 2, | |
121 | D40_DMA_SUSPENDED = 3 | |
122 | }; | |
123 | ||
1bdae6f4 N |
124 | /* |
125 | * enum d40_events - The different Event Enables for the event lines. | |
126 | * | |
127 | * @D40_DEACTIVATE_EVENTLINE: De-activate Event line, stopping the logical chan. | |
128 | * @D40_ACTIVATE_EVENTLINE: Activate the Event line, to start a logical chan. | |
129 | * @D40_SUSPEND_REQ_EVENTLINE: Requesting for suspending a event line. | |
130 | * @D40_ROUND_EVENTLINE: Status check for event line. | |
131 | */ | |
132 | ||
133 | enum d40_events { | |
134 | D40_DEACTIVATE_EVENTLINE = 0, | |
135 | D40_ACTIVATE_EVENTLINE = 1, | |
136 | D40_SUSPEND_REQ_EVENTLINE = 2, | |
137 | D40_ROUND_EVENTLINE = 3 | |
138 | }; | |
139 | ||
7fb3e75e N |
140 | /* |
141 | * These are the registers that has to be saved and later restored | |
142 | * when the DMA hw is powered off. | |
143 | * TODO: Add save/restore of D40_DREG_GCC on dma40 v3 or later, if that works. | |
144 | */ | |
145 | static u32 d40_backup_regs[] = { | |
146 | D40_DREG_LCPA, | |
147 | D40_DREG_LCLA, | |
148 | D40_DREG_PRMSE, | |
149 | D40_DREG_PRMSO, | |
150 | D40_DREG_PRMOE, | |
151 | D40_DREG_PRMOO, | |
152 | }; | |
153 | ||
154 | #define BACKUP_REGS_SZ ARRAY_SIZE(d40_backup_regs) | |
155 | ||
3cb645dc TL |
156 | /* |
157 | * since 9540 and 8540 has the same HW revision | |
158 | * use v4a for 9540 or ealier | |
159 | * use v4b for 8540 or later | |
160 | * HW revision: | |
161 | * DB8500ed has revision 0 | |
162 | * DB8500v1 has revision 2 | |
163 | * DB8500v2 has revision 3 | |
164 | * AP9540v1 has revision 4 | |
165 | * DB8540v1 has revision 4 | |
166 | * TODO: Check if all these registers have to be saved/restored on dma40 v4a | |
167 | */ | |
168 | static u32 d40_backup_regs_v4a[] = { | |
7fb3e75e N |
169 | D40_DREG_PSEG1, |
170 | D40_DREG_PSEG2, | |
171 | D40_DREG_PSEG3, | |
172 | D40_DREG_PSEG4, | |
173 | D40_DREG_PCEG1, | |
174 | D40_DREG_PCEG2, | |
175 | D40_DREG_PCEG3, | |
176 | D40_DREG_PCEG4, | |
177 | D40_DREG_RSEG1, | |
178 | D40_DREG_RSEG2, | |
179 | D40_DREG_RSEG3, | |
180 | D40_DREG_RSEG4, | |
181 | D40_DREG_RCEG1, | |
182 | D40_DREG_RCEG2, | |
183 | D40_DREG_RCEG3, | |
184 | D40_DREG_RCEG4, | |
185 | }; | |
186 | ||
3cb645dc TL |
187 | #define BACKUP_REGS_SZ_V4A ARRAY_SIZE(d40_backup_regs_v4a) |
188 | ||
189 | static u32 d40_backup_regs_v4b[] = { | |
190 | D40_DREG_CPSEG1, | |
191 | D40_DREG_CPSEG2, | |
192 | D40_DREG_CPSEG3, | |
193 | D40_DREG_CPSEG4, | |
194 | D40_DREG_CPSEG5, | |
195 | D40_DREG_CPCEG1, | |
196 | D40_DREG_CPCEG2, | |
197 | D40_DREG_CPCEG3, | |
198 | D40_DREG_CPCEG4, | |
199 | D40_DREG_CPCEG5, | |
200 | D40_DREG_CRSEG1, | |
201 | D40_DREG_CRSEG2, | |
202 | D40_DREG_CRSEG3, | |
203 | D40_DREG_CRSEG4, | |
204 | D40_DREG_CRSEG5, | |
205 | D40_DREG_CRCEG1, | |
206 | D40_DREG_CRCEG2, | |
207 | D40_DREG_CRCEG3, | |
208 | D40_DREG_CRCEG4, | |
209 | D40_DREG_CRCEG5, | |
210 | }; | |
211 | ||
212 | #define BACKUP_REGS_SZ_V4B ARRAY_SIZE(d40_backup_regs_v4b) | |
7fb3e75e N |
213 | |
214 | static u32 d40_backup_regs_chan[] = { | |
215 | D40_CHAN_REG_SSCFG, | |
216 | D40_CHAN_REG_SSELT, | |
217 | D40_CHAN_REG_SSPTR, | |
218 | D40_CHAN_REG_SSLNK, | |
219 | D40_CHAN_REG_SDCFG, | |
220 | D40_CHAN_REG_SDELT, | |
221 | D40_CHAN_REG_SDPTR, | |
222 | D40_CHAN_REG_SDLNK, | |
223 | }; | |
224 | ||
84b3da14 LJ |
225 | #define BACKUP_REGS_SZ_MAX ((BACKUP_REGS_SZ_V4A > BACKUP_REGS_SZ_V4B) ? \ |
226 | BACKUP_REGS_SZ_V4A : BACKUP_REGS_SZ_V4B) | |
227 | ||
3cb645dc TL |
228 | /** |
229 | * struct d40_interrupt_lookup - lookup table for interrupt handler | |
230 | * | |
231 | * @src: Interrupt mask register. | |
232 | * @clr: Interrupt clear register. | |
233 | * @is_error: true if this is an error interrupt. | |
234 | * @offset: start delta in the lookup_log_chans in d40_base. If equals to | |
235 | * D40_PHY_CHAN, the lookup_phy_chans shall be used instead. | |
236 | */ | |
237 | struct d40_interrupt_lookup { | |
238 | u32 src; | |
239 | u32 clr; | |
240 | bool is_error; | |
241 | int offset; | |
242 | }; | |
243 | ||
244 | ||
245 | static struct d40_interrupt_lookup il_v4a[] = { | |
246 | {D40_DREG_LCTIS0, D40_DREG_LCICR0, false, 0}, | |
247 | {D40_DREG_LCTIS1, D40_DREG_LCICR1, false, 32}, | |
248 | {D40_DREG_LCTIS2, D40_DREG_LCICR2, false, 64}, | |
249 | {D40_DREG_LCTIS3, D40_DREG_LCICR3, false, 96}, | |
250 | {D40_DREG_LCEIS0, D40_DREG_LCICR0, true, 0}, | |
251 | {D40_DREG_LCEIS1, D40_DREG_LCICR1, true, 32}, | |
252 | {D40_DREG_LCEIS2, D40_DREG_LCICR2, true, 64}, | |
253 | {D40_DREG_LCEIS3, D40_DREG_LCICR3, true, 96}, | |
254 | {D40_DREG_PCTIS, D40_DREG_PCICR, false, D40_PHY_CHAN}, | |
255 | {D40_DREG_PCEIS, D40_DREG_PCICR, true, D40_PHY_CHAN}, | |
256 | }; | |
257 | ||
258 | static struct d40_interrupt_lookup il_v4b[] = { | |
259 | {D40_DREG_CLCTIS1, D40_DREG_CLCICR1, false, 0}, | |
260 | {D40_DREG_CLCTIS2, D40_DREG_CLCICR2, false, 32}, | |
261 | {D40_DREG_CLCTIS3, D40_DREG_CLCICR3, false, 64}, | |
262 | {D40_DREG_CLCTIS4, D40_DREG_CLCICR4, false, 96}, | |
263 | {D40_DREG_CLCTIS5, D40_DREG_CLCICR5, false, 128}, | |
264 | {D40_DREG_CLCEIS1, D40_DREG_CLCICR1, true, 0}, | |
265 | {D40_DREG_CLCEIS2, D40_DREG_CLCICR2, true, 32}, | |
266 | {D40_DREG_CLCEIS3, D40_DREG_CLCICR3, true, 64}, | |
267 | {D40_DREG_CLCEIS4, D40_DREG_CLCICR4, true, 96}, | |
268 | {D40_DREG_CLCEIS5, D40_DREG_CLCICR5, true, 128}, | |
269 | {D40_DREG_CPCTIS, D40_DREG_CPCICR, false, D40_PHY_CHAN}, | |
270 | {D40_DREG_CPCEIS, D40_DREG_CPCICR, true, D40_PHY_CHAN}, | |
271 | }; | |
272 | ||
273 | /** | |
274 | * struct d40_reg_val - simple lookup struct | |
275 | * | |
276 | * @reg: The register. | |
277 | * @val: The value that belongs to the register in reg. | |
278 | */ | |
279 | struct d40_reg_val { | |
280 | unsigned int reg; | |
281 | unsigned int val; | |
282 | }; | |
283 | ||
284 | static __initdata struct d40_reg_val dma_init_reg_v4a[] = { | |
285 | /* Clock every part of the DMA block from start */ | |
286 | { .reg = D40_DREG_GCC, .val = D40_DREG_GCC_ENABLE_ALL}, | |
287 | ||
288 | /* Interrupts on all logical channels */ | |
289 | { .reg = D40_DREG_LCMIS0, .val = 0xFFFFFFFF}, | |
290 | { .reg = D40_DREG_LCMIS1, .val = 0xFFFFFFFF}, | |
291 | { .reg = D40_DREG_LCMIS2, .val = 0xFFFFFFFF}, | |
292 | { .reg = D40_DREG_LCMIS3, .val = 0xFFFFFFFF}, | |
293 | { .reg = D40_DREG_LCICR0, .val = 0xFFFFFFFF}, | |
294 | { .reg = D40_DREG_LCICR1, .val = 0xFFFFFFFF}, | |
295 | { .reg = D40_DREG_LCICR2, .val = 0xFFFFFFFF}, | |
296 | { .reg = D40_DREG_LCICR3, .val = 0xFFFFFFFF}, | |
297 | { .reg = D40_DREG_LCTIS0, .val = 0xFFFFFFFF}, | |
298 | { .reg = D40_DREG_LCTIS1, .val = 0xFFFFFFFF}, | |
299 | { .reg = D40_DREG_LCTIS2, .val = 0xFFFFFFFF}, | |
300 | { .reg = D40_DREG_LCTIS3, .val = 0xFFFFFFFF} | |
301 | }; | |
302 | static __initdata struct d40_reg_val dma_init_reg_v4b[] = { | |
303 | /* Clock every part of the DMA block from start */ | |
304 | { .reg = D40_DREG_GCC, .val = D40_DREG_GCC_ENABLE_ALL}, | |
305 | ||
306 | /* Interrupts on all logical channels */ | |
307 | { .reg = D40_DREG_CLCMIS1, .val = 0xFFFFFFFF}, | |
308 | { .reg = D40_DREG_CLCMIS2, .val = 0xFFFFFFFF}, | |
309 | { .reg = D40_DREG_CLCMIS3, .val = 0xFFFFFFFF}, | |
310 | { .reg = D40_DREG_CLCMIS4, .val = 0xFFFFFFFF}, | |
311 | { .reg = D40_DREG_CLCMIS5, .val = 0xFFFFFFFF}, | |
312 | { .reg = D40_DREG_CLCICR1, .val = 0xFFFFFFFF}, | |
313 | { .reg = D40_DREG_CLCICR2, .val = 0xFFFFFFFF}, | |
314 | { .reg = D40_DREG_CLCICR3, .val = 0xFFFFFFFF}, | |
315 | { .reg = D40_DREG_CLCICR4, .val = 0xFFFFFFFF}, | |
316 | { .reg = D40_DREG_CLCICR5, .val = 0xFFFFFFFF}, | |
317 | { .reg = D40_DREG_CLCTIS1, .val = 0xFFFFFFFF}, | |
318 | { .reg = D40_DREG_CLCTIS2, .val = 0xFFFFFFFF}, | |
319 | { .reg = D40_DREG_CLCTIS3, .val = 0xFFFFFFFF}, | |
320 | { .reg = D40_DREG_CLCTIS4, .val = 0xFFFFFFFF}, | |
321 | { .reg = D40_DREG_CLCTIS5, .val = 0xFFFFFFFF} | |
322 | }; | |
323 | ||
8d318a50 LW |
324 | /** |
325 | * struct d40_lli_pool - Structure for keeping LLIs in memory | |
326 | * | |
327 | * @base: Pointer to memory area when the pre_alloc_lli's are not large | |
328 | * enough, IE bigger than the most common case, 1 dst and 1 src. NULL if | |
329 | * pre_alloc_lli is used. | |
b00f938c | 330 | * @dma_addr: DMA address, if mapped |
8d318a50 LW |
331 | * @size: The size in bytes of the memory at base or the size of pre_alloc_lli. |
332 | * @pre_alloc_lli: Pre allocated area for the most common case of transfers, | |
333 | * one buffer to one buffer. | |
334 | */ | |
335 | struct d40_lli_pool { | |
336 | void *base; | |
508849ad | 337 | int size; |
b00f938c | 338 | dma_addr_t dma_addr; |
8d318a50 | 339 | /* Space for dst and src, plus an extra for padding */ |
508849ad | 340 | u8 pre_alloc_lli[3 * sizeof(struct d40_phy_lli)]; |
8d318a50 LW |
341 | }; |
342 | ||
343 | /** | |
344 | * struct d40_desc - A descriptor is one DMA job. | |
345 | * | |
346 | * @lli_phy: LLI settings for physical channel. Both src and dst= | |
347 | * points into the lli_pool, to base if lli_len > 1 or to pre_alloc_lli if | |
348 | * lli_len equals one. | |
349 | * @lli_log: Same as above but for logical channels. | |
350 | * @lli_pool: The pool with two entries pre-allocated. | |
941b77a3 | 351 | * @lli_len: Number of llis of current descriptor. |
25985edc | 352 | * @lli_current: Number of transferred llis. |
698e4732 | 353 | * @lcla_alloc: Number of LCLA entries allocated. |
8d318a50 LW |
354 | * @txd: DMA engine struct. Used for among other things for communication |
355 | * during a transfer. | |
356 | * @node: List entry. | |
8d318a50 | 357 | * @is_in_client_list: true if the client owns this descriptor. |
7fb3e75e | 358 | * @cyclic: true if this is a cyclic job |
8d318a50 LW |
359 | * |
360 | * This descriptor is used for both logical and physical transfers. | |
361 | */ | |
8d318a50 LW |
362 | struct d40_desc { |
363 | /* LLI physical */ | |
364 | struct d40_phy_lli_bidir lli_phy; | |
365 | /* LLI logical */ | |
366 | struct d40_log_lli_bidir lli_log; | |
367 | ||
368 | struct d40_lli_pool lli_pool; | |
941b77a3 | 369 | int lli_len; |
698e4732 JA |
370 | int lli_current; |
371 | int lcla_alloc; | |
8d318a50 LW |
372 | |
373 | struct dma_async_tx_descriptor txd; | |
374 | struct list_head node; | |
375 | ||
8d318a50 | 376 | bool is_in_client_list; |
0c842b55 | 377 | bool cyclic; |
8d318a50 LW |
378 | }; |
379 | ||
380 | /** | |
381 | * struct d40_lcla_pool - LCLA pool settings and data. | |
382 | * | |
508849ad LW |
383 | * @base: The virtual address of LCLA. 18 bit aligned. |
384 | * @base_unaligned: The orignal kmalloc pointer, if kmalloc is used. | |
385 | * This pointer is only there for clean-up on error. | |
386 | * @pages: The number of pages needed for all physical channels. | |
387 | * Only used later for clean-up on error | |
8d318a50 | 388 | * @lock: Lock to protect the content in this struct. |
698e4732 | 389 | * @alloc_map: big map over which LCLA entry is own by which job. |
8d318a50 LW |
390 | */ |
391 | struct d40_lcla_pool { | |
392 | void *base; | |
026cbc42 | 393 | dma_addr_t dma_addr; |
508849ad LW |
394 | void *base_unaligned; |
395 | int pages; | |
8d318a50 | 396 | spinlock_t lock; |
698e4732 | 397 | struct d40_desc **alloc_map; |
8d318a50 LW |
398 | }; |
399 | ||
400 | /** | |
401 | * struct d40_phy_res - struct for handling eventlines mapped to physical | |
402 | * channels. | |
403 | * | |
404 | * @lock: A lock protection this entity. | |
7fb3e75e | 405 | * @reserved: True if used by secure world or otherwise. |
8d318a50 LW |
406 | * @num: The physical channel number of this entity. |
407 | * @allocated_src: Bit mapped to show which src event line's are mapped to | |
408 | * this physical channel. Can also be free or physically allocated. | |
409 | * @allocated_dst: Same as for src but is dst. | |
410 | * allocated_dst and allocated_src uses the D40_ALLOC* defines as well as | |
767a9675 | 411 | * event line number. |
7407048b | 412 | * @use_soft_lli: To mark if the linked lists of channel are managed by SW. |
8d318a50 LW |
413 | */ |
414 | struct d40_phy_res { | |
415 | spinlock_t lock; | |
7fb3e75e | 416 | bool reserved; |
8d318a50 LW |
417 | int num; |
418 | u32 allocated_src; | |
419 | u32 allocated_dst; | |
7407048b | 420 | bool use_soft_lli; |
8d318a50 LW |
421 | }; |
422 | ||
423 | struct d40_base; | |
424 | ||
425 | /** | |
426 | * struct d40_chan - Struct that describes a channel. | |
427 | * | |
428 | * @lock: A spinlock to protect this struct. | |
429 | * @log_num: The logical number, if any of this channel. | |
8d318a50 LW |
430 | * @pending_tx: The number of pending transfers. Used between interrupt handler |
431 | * and tasklet. | |
432 | * @busy: Set to true when transfer is ongoing on this channel. | |
2a614340 JA |
433 | * @phy_chan: Pointer to physical channel which this instance runs on. If this |
434 | * point is NULL, then the channel is not allocated. | |
8d318a50 LW |
435 | * @chan: DMA engine handle. |
436 | * @tasklet: Tasklet that gets scheduled from interrupt context to complete a | |
437 | * transfer and call client callback. | |
438 | * @client: Cliented owned descriptor list. | |
da063d26 | 439 | * @pending_queue: Submitted jobs, to be issued by issue_pending() |
8d318a50 | 440 | * @active: Active descriptor. |
4226dd86 | 441 | * @done: Completed jobs |
8d318a50 | 442 | * @queue: Queued jobs. |
82babbb3 | 443 | * @prepare_queue: Prepared jobs. |
8d318a50 | 444 | * @dma_cfg: The client configuration of this dma channel. |
ce2ca125 | 445 | * @configured: whether the dma_cfg configuration is valid |
8d318a50 LW |
446 | * @base: Pointer to the device instance struct. |
447 | * @src_def_cfg: Default cfg register setting for src. | |
448 | * @dst_def_cfg: Default cfg register setting for dst. | |
449 | * @log_def: Default logical channel settings. | |
8d318a50 | 450 | * @lcpa: Pointer to dst and src lcpa settings. |
ae752bf4 | 451 | * @runtime_addr: runtime configured address. |
452 | * @runtime_direction: runtime configured direction. | |
8d318a50 LW |
453 | * |
454 | * This struct can either "be" a logical or a physical channel. | |
455 | */ | |
456 | struct d40_chan { | |
457 | spinlock_t lock; | |
458 | int log_num; | |
8d318a50 LW |
459 | int pending_tx; |
460 | bool busy; | |
461 | struct d40_phy_res *phy_chan; | |
462 | struct dma_chan chan; | |
463 | struct tasklet_struct tasklet; | |
464 | struct list_head client; | |
a8f3067b | 465 | struct list_head pending_queue; |
8d318a50 | 466 | struct list_head active; |
4226dd86 | 467 | struct list_head done; |
8d318a50 | 468 | struct list_head queue; |
82babbb3 | 469 | struct list_head prepare_queue; |
8d318a50 | 470 | struct stedma40_chan_cfg dma_cfg; |
ce2ca125 | 471 | bool configured; |
8d318a50 LW |
472 | struct d40_base *base; |
473 | /* Default register configurations */ | |
474 | u32 src_def_cfg; | |
475 | u32 dst_def_cfg; | |
476 | struct d40_def_lcsp log_def; | |
8d318a50 | 477 | struct d40_log_lli_full *lcpa; |
95e1400f LW |
478 | /* Runtime reconfiguration */ |
479 | dma_addr_t runtime_addr; | |
db8196df | 480 | enum dma_transfer_direction runtime_direction; |
8d318a50 LW |
481 | }; |
482 | ||
3cb645dc TL |
483 | /** |
484 | * struct d40_gen_dmac - generic values to represent u8500/u8540 DMA | |
485 | * controller | |
486 | * | |
487 | * @backup: the pointer to the registers address array for backup | |
488 | * @backup_size: the size of the registers address array for backup | |
489 | * @realtime_en: the realtime enable register | |
490 | * @realtime_clear: the realtime clear register | |
491 | * @high_prio_en: the high priority enable register | |
492 | * @high_prio_clear: the high priority clear register | |
493 | * @interrupt_en: the interrupt enable register | |
494 | * @interrupt_clear: the interrupt clear register | |
495 | * @il: the pointer to struct d40_interrupt_lookup | |
496 | * @il_size: the size of d40_interrupt_lookup array | |
497 | * @init_reg: the pointer to the struct d40_reg_val | |
498 | * @init_reg_size: the size of d40_reg_val array | |
499 | */ | |
500 | struct d40_gen_dmac { | |
501 | u32 *backup; | |
502 | u32 backup_size; | |
503 | u32 realtime_en; | |
504 | u32 realtime_clear; | |
505 | u32 high_prio_en; | |
506 | u32 high_prio_clear; | |
507 | u32 interrupt_en; | |
508 | u32 interrupt_clear; | |
509 | struct d40_interrupt_lookup *il; | |
510 | u32 il_size; | |
511 | struct d40_reg_val *init_reg; | |
512 | u32 init_reg_size; | |
513 | }; | |
514 | ||
8d318a50 LW |
515 | /** |
516 | * struct d40_base - The big global struct, one for each probe'd instance. | |
517 | * | |
518 | * @interrupt_lock: Lock used to make sure one interrupt is handle a time. | |
519 | * @execmd_lock: Lock for execute command usage since several channels share | |
520 | * the same physical register. | |
521 | * @dev: The device structure. | |
522 | * @virtbase: The virtual base address of the DMA's register. | |
f4185592 | 523 | * @rev: silicon revision detected. |
8d318a50 LW |
524 | * @clk: Pointer to the DMA clock structure. |
525 | * @phy_start: Physical memory start of the DMA registers. | |
526 | * @phy_size: Size of the DMA register map. | |
527 | * @irq: The IRQ number. | |
a7dacb68 LJ |
528 | * @num_memcpy_chans: The number of channels used for memcpy (mem-to-mem |
529 | * transfers). | |
8d318a50 LW |
530 | * @num_phy_chans: The number of physical channels. Read from HW. This |
531 | * is the number of available channels for this driver, not counting "Secure | |
532 | * mode" allocated physical channels. | |
533 | * @num_log_chans: The number of logical channels. Calculated from | |
534 | * num_phy_chans. | |
535 | * @dma_both: dma_device channels that can do both memcpy and slave transfers. | |
536 | * @dma_slave: dma_device channels that can do only do slave transfers. | |
537 | * @dma_memcpy: dma_device channels that can do only do memcpy transfers. | |
7fb3e75e | 538 | * @phy_chans: Room for all possible physical channels in system. |
8d318a50 LW |
539 | * @log_chans: Room for all possible logical channels in system. |
540 | * @lookup_log_chans: Used to map interrupt number to logical channel. Points | |
541 | * to log_chans entries. | |
542 | * @lookup_phy_chans: Used to map interrupt number to physical channel. Points | |
543 | * to phy_chans entries. | |
544 | * @plat_data: Pointer to provided platform_data which is the driver | |
545 | * configuration. | |
28c7a19d | 546 | * @lcpa_regulator: Pointer to hold the regulator for the esram bank for lcla. |
8d318a50 LW |
547 | * @phy_res: Vector containing all physical channels. |
548 | * @lcla_pool: lcla pool settings and data. | |
549 | * @lcpa_base: The virtual mapped address of LCPA. | |
550 | * @phy_lcpa: The physical address of the LCPA. | |
551 | * @lcpa_size: The size of the LCPA area. | |
c675b1b4 | 552 | * @desc_slab: cache for descriptors. |
7fb3e75e N |
553 | * @reg_val_backup: Here the values of some hardware registers are stored |
554 | * before the DMA is powered off. They are restored when the power is back on. | |
3cb645dc TL |
555 | * @reg_val_backup_v4: Backup of registers that only exits on dma40 v3 and |
556 | * later | |
7fb3e75e N |
557 | * @reg_val_backup_chan: Backup data for standard channel parameter registers. |
558 | * @gcc_pwr_off_mask: Mask to maintain the channels that can be turned off. | |
3cb645dc TL |
559 | * @gen_dmac: the struct for generic registers values to represent u8500/8540 |
560 | * DMA controller | |
8d318a50 LW |
561 | */ |
562 | struct d40_base { | |
563 | spinlock_t interrupt_lock; | |
564 | spinlock_t execmd_lock; | |
565 | struct device *dev; | |
566 | void __iomem *virtbase; | |
f4185592 | 567 | u8 rev:4; |
8d318a50 LW |
568 | struct clk *clk; |
569 | phys_addr_t phy_start; | |
570 | resource_size_t phy_size; | |
571 | int irq; | |
a7dacb68 | 572 | int num_memcpy_chans; |
8d318a50 LW |
573 | int num_phy_chans; |
574 | int num_log_chans; | |
b96710e5 | 575 | struct device_dma_parameters dma_parms; |
8d318a50 LW |
576 | struct dma_device dma_both; |
577 | struct dma_device dma_slave; | |
578 | struct dma_device dma_memcpy; | |
579 | struct d40_chan *phy_chans; | |
580 | struct d40_chan *log_chans; | |
581 | struct d40_chan **lookup_log_chans; | |
582 | struct d40_chan **lookup_phy_chans; | |
583 | struct stedma40_platform_data *plat_data; | |
28c7a19d | 584 | struct regulator *lcpa_regulator; |
8d318a50 LW |
585 | /* Physical half channels */ |
586 | struct d40_phy_res *phy_res; | |
587 | struct d40_lcla_pool lcla_pool; | |
588 | void *lcpa_base; | |
589 | dma_addr_t phy_lcpa; | |
590 | resource_size_t lcpa_size; | |
c675b1b4 | 591 | struct kmem_cache *desc_slab; |
7fb3e75e | 592 | u32 reg_val_backup[BACKUP_REGS_SZ]; |
84b3da14 | 593 | u32 reg_val_backup_v4[BACKUP_REGS_SZ_MAX]; |
7fb3e75e N |
594 | u32 *reg_val_backup_chan; |
595 | u16 gcc_pwr_off_mask; | |
3cb645dc | 596 | struct d40_gen_dmac gen_dmac; |
8d318a50 LW |
597 | }; |
598 | ||
262d2915 RV |
599 | static struct device *chan2dev(struct d40_chan *d40c) |
600 | { | |
601 | return &d40c->chan.dev->device; | |
602 | } | |
603 | ||
724a8577 RV |
604 | static bool chan_is_physical(struct d40_chan *chan) |
605 | { | |
606 | return chan->log_num == D40_PHY_CHAN; | |
607 | } | |
608 | ||
609 | static bool chan_is_logical(struct d40_chan *chan) | |
610 | { | |
611 | return !chan_is_physical(chan); | |
612 | } | |
613 | ||
8ca84687 RV |
614 | static void __iomem *chan_base(struct d40_chan *chan) |
615 | { | |
616 | return chan->base->virtbase + D40_DREG_PCBASE + | |
617 | chan->phy_chan->num * D40_DREG_PCDELTA; | |
618 | } | |
619 | ||
6db5a8ba RV |
620 | #define d40_err(dev, format, arg...) \ |
621 | dev_err(dev, "[%s] " format, __func__, ## arg) | |
622 | ||
623 | #define chan_err(d40c, format, arg...) \ | |
624 | d40_err(chan2dev(d40c), format, ## arg) | |
625 | ||
b00f938c | 626 | static int d40_pool_lli_alloc(struct d40_chan *d40c, struct d40_desc *d40d, |
dbd88788 | 627 | int lli_len) |
8d318a50 | 628 | { |
dbd88788 | 629 | bool is_log = chan_is_logical(d40c); |
8d318a50 LW |
630 | u32 align; |
631 | void *base; | |
632 | ||
633 | if (is_log) | |
634 | align = sizeof(struct d40_log_lli); | |
635 | else | |
636 | align = sizeof(struct d40_phy_lli); | |
637 | ||
638 | if (lli_len == 1) { | |
639 | base = d40d->lli_pool.pre_alloc_lli; | |
640 | d40d->lli_pool.size = sizeof(d40d->lli_pool.pre_alloc_lli); | |
641 | d40d->lli_pool.base = NULL; | |
642 | } else { | |
594ece4d | 643 | d40d->lli_pool.size = lli_len * 2 * align; |
8d318a50 LW |
644 | |
645 | base = kmalloc(d40d->lli_pool.size + align, GFP_NOWAIT); | |
646 | d40d->lli_pool.base = base; | |
647 | ||
648 | if (d40d->lli_pool.base == NULL) | |
649 | return -ENOMEM; | |
650 | } | |
651 | ||
652 | if (is_log) { | |
d924abad | 653 | d40d->lli_log.src = PTR_ALIGN(base, align); |
594ece4d | 654 | d40d->lli_log.dst = d40d->lli_log.src + lli_len; |
b00f938c RV |
655 | |
656 | d40d->lli_pool.dma_addr = 0; | |
8d318a50 | 657 | } else { |
d924abad | 658 | d40d->lli_phy.src = PTR_ALIGN(base, align); |
594ece4d | 659 | d40d->lli_phy.dst = d40d->lli_phy.src + lli_len; |
b00f938c RV |
660 | |
661 | d40d->lli_pool.dma_addr = dma_map_single(d40c->base->dev, | |
662 | d40d->lli_phy.src, | |
663 | d40d->lli_pool.size, | |
664 | DMA_TO_DEVICE); | |
665 | ||
666 | if (dma_mapping_error(d40c->base->dev, | |
667 | d40d->lli_pool.dma_addr)) { | |
668 | kfree(d40d->lli_pool.base); | |
669 | d40d->lli_pool.base = NULL; | |
670 | d40d->lli_pool.dma_addr = 0; | |
671 | return -ENOMEM; | |
672 | } | |
8d318a50 LW |
673 | } |
674 | ||
675 | return 0; | |
676 | } | |
677 | ||
b00f938c | 678 | static void d40_pool_lli_free(struct d40_chan *d40c, struct d40_desc *d40d) |
8d318a50 | 679 | { |
b00f938c RV |
680 | if (d40d->lli_pool.dma_addr) |
681 | dma_unmap_single(d40c->base->dev, d40d->lli_pool.dma_addr, | |
682 | d40d->lli_pool.size, DMA_TO_DEVICE); | |
683 | ||
8d318a50 LW |
684 | kfree(d40d->lli_pool.base); |
685 | d40d->lli_pool.base = NULL; | |
686 | d40d->lli_pool.size = 0; | |
687 | d40d->lli_log.src = NULL; | |
688 | d40d->lli_log.dst = NULL; | |
689 | d40d->lli_phy.src = NULL; | |
690 | d40d->lli_phy.dst = NULL; | |
8d318a50 LW |
691 | } |
692 | ||
698e4732 JA |
693 | static int d40_lcla_alloc_one(struct d40_chan *d40c, |
694 | struct d40_desc *d40d) | |
695 | { | |
696 | unsigned long flags; | |
697 | int i; | |
698 | int ret = -EINVAL; | |
698e4732 JA |
699 | |
700 | spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags); | |
701 | ||
698e4732 JA |
702 | /* |
703 | * Allocate both src and dst at the same time, therefore the half | |
704 | * start on 1 since 0 can't be used since zero is used as end marker. | |
705 | */ | |
706 | for (i = 1 ; i < D40_LCLA_LINK_PER_EVENT_GRP / 2; i++) { | |
7ce529ef FB |
707 | int idx = d40c->phy_chan->num * D40_LCLA_LINK_PER_EVENT_GRP + i; |
708 | ||
709 | if (!d40c->base->lcla_pool.alloc_map[idx]) { | |
710 | d40c->base->lcla_pool.alloc_map[idx] = d40d; | |
698e4732 JA |
711 | d40d->lcla_alloc++; |
712 | ret = i; | |
713 | break; | |
714 | } | |
715 | } | |
716 | ||
717 | spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags); | |
718 | ||
719 | return ret; | |
720 | } | |
721 | ||
722 | static int d40_lcla_free_all(struct d40_chan *d40c, | |
723 | struct d40_desc *d40d) | |
724 | { | |
725 | unsigned long flags; | |
726 | int i; | |
727 | int ret = -EINVAL; | |
728 | ||
724a8577 | 729 | if (chan_is_physical(d40c)) |
698e4732 JA |
730 | return 0; |
731 | ||
732 | spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags); | |
733 | ||
734 | for (i = 1 ; i < D40_LCLA_LINK_PER_EVENT_GRP / 2; i++) { | |
7ce529ef FB |
735 | int idx = d40c->phy_chan->num * D40_LCLA_LINK_PER_EVENT_GRP + i; |
736 | ||
737 | if (d40c->base->lcla_pool.alloc_map[idx] == d40d) { | |
738 | d40c->base->lcla_pool.alloc_map[idx] = NULL; | |
698e4732 JA |
739 | d40d->lcla_alloc--; |
740 | if (d40d->lcla_alloc == 0) { | |
741 | ret = 0; | |
742 | break; | |
743 | } | |
744 | } | |
745 | } | |
746 | ||
747 | spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags); | |
748 | ||
749 | return ret; | |
750 | ||
751 | } | |
752 | ||
8d318a50 LW |
753 | static void d40_desc_remove(struct d40_desc *d40d) |
754 | { | |
755 | list_del(&d40d->node); | |
756 | } | |
757 | ||
758 | static struct d40_desc *d40_desc_get(struct d40_chan *d40c) | |
759 | { | |
a2c15fa4 | 760 | struct d40_desc *desc = NULL; |
8d318a50 LW |
761 | |
762 | if (!list_empty(&d40c->client)) { | |
a2c15fa4 RV |
763 | struct d40_desc *d; |
764 | struct d40_desc *_d; | |
765 | ||
7fb3e75e | 766 | list_for_each_entry_safe(d, _d, &d40c->client, node) { |
8d318a50 | 767 | if (async_tx_test_ack(&d->txd)) { |
8d318a50 | 768 | d40_desc_remove(d); |
a2c15fa4 RV |
769 | desc = d; |
770 | memset(desc, 0, sizeof(*desc)); | |
c675b1b4 | 771 | break; |
8d318a50 | 772 | } |
7fb3e75e | 773 | } |
8d318a50 | 774 | } |
a2c15fa4 RV |
775 | |
776 | if (!desc) | |
777 | desc = kmem_cache_zalloc(d40c->base->desc_slab, GFP_NOWAIT); | |
778 | ||
779 | if (desc) | |
780 | INIT_LIST_HEAD(&desc->node); | |
781 | ||
782 | return desc; | |
8d318a50 LW |
783 | } |
784 | ||
785 | static void d40_desc_free(struct d40_chan *d40c, struct d40_desc *d40d) | |
786 | { | |
698e4732 | 787 | |
b00f938c | 788 | d40_pool_lli_free(d40c, d40d); |
698e4732 | 789 | d40_lcla_free_all(d40c, d40d); |
c675b1b4 | 790 | kmem_cache_free(d40c->base->desc_slab, d40d); |
8d318a50 LW |
791 | } |
792 | ||
793 | static void d40_desc_submit(struct d40_chan *d40c, struct d40_desc *desc) | |
794 | { | |
795 | list_add_tail(&desc->node, &d40c->active); | |
796 | } | |
797 | ||
1c4b0927 RV |
798 | static void d40_phy_lli_load(struct d40_chan *chan, struct d40_desc *desc) |
799 | { | |
800 | struct d40_phy_lli *lli_dst = desc->lli_phy.dst; | |
801 | struct d40_phy_lli *lli_src = desc->lli_phy.src; | |
802 | void __iomem *base = chan_base(chan); | |
803 | ||
804 | writel(lli_src->reg_cfg, base + D40_CHAN_REG_SSCFG); | |
805 | writel(lli_src->reg_elt, base + D40_CHAN_REG_SSELT); | |
806 | writel(lli_src->reg_ptr, base + D40_CHAN_REG_SSPTR); | |
807 | writel(lli_src->reg_lnk, base + D40_CHAN_REG_SSLNK); | |
808 | ||
809 | writel(lli_dst->reg_cfg, base + D40_CHAN_REG_SDCFG); | |
810 | writel(lli_dst->reg_elt, base + D40_CHAN_REG_SDELT); | |
811 | writel(lli_dst->reg_ptr, base + D40_CHAN_REG_SDPTR); | |
812 | writel(lli_dst->reg_lnk, base + D40_CHAN_REG_SDLNK); | |
813 | } | |
814 | ||
4226dd86 FB |
815 | static void d40_desc_done(struct d40_chan *d40c, struct d40_desc *desc) |
816 | { | |
817 | list_add_tail(&desc->node, &d40c->done); | |
818 | } | |
819 | ||
e65889c7 | 820 | static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc) |
698e4732 | 821 | { |
e65889c7 RV |
822 | struct d40_lcla_pool *pool = &chan->base->lcla_pool; |
823 | struct d40_log_lli_bidir *lli = &desc->lli_log; | |
824 | int lli_current = desc->lli_current; | |
825 | int lli_len = desc->lli_len; | |
0c842b55 | 826 | bool cyclic = desc->cyclic; |
e65889c7 | 827 | int curr_lcla = -EINVAL; |
0c842b55 | 828 | int first_lcla = 0; |
28c7a19d | 829 | bool use_esram_lcla = chan->base->plat_data->use_esram_lcla; |
0c842b55 | 830 | bool linkback; |
e65889c7 | 831 | |
0c842b55 RV |
832 | /* |
833 | * We may have partially running cyclic transfers, in case we did't get | |
834 | * enough LCLA entries. | |
835 | */ | |
836 | linkback = cyclic && lli_current == 0; | |
837 | ||
838 | /* | |
839 | * For linkback, we need one LCLA even with only one link, because we | |
840 | * can't link back to the one in LCPA space | |
841 | */ | |
842 | if (linkback || (lli_len - lli_current > 1)) { | |
7407048b FB |
843 | /* |
844 | * If the channel is expected to use only soft_lli don't | |
845 | * allocate a lcla. This is to avoid a HW issue that exists | |
846 | * in some controller during a peripheral to memory transfer | |
847 | * that uses linked lists. | |
848 | */ | |
849 | if (!(chan->phy_chan->use_soft_lli && | |
2c2b62d5 | 850 | chan->dma_cfg.dir == DMA_DEV_TO_MEM)) |
7407048b FB |
851 | curr_lcla = d40_lcla_alloc_one(chan, desc); |
852 | ||
0c842b55 RV |
853 | first_lcla = curr_lcla; |
854 | } | |
855 | ||
856 | /* | |
857 | * For linkback, we normally load the LCPA in the loop since we need to | |
858 | * link it to the second LCLA and not the first. However, if we | |
859 | * couldn't even get a first LCLA, then we have to run in LCPA and | |
860 | * reload manually. | |
861 | */ | |
862 | if (!linkback || curr_lcla == -EINVAL) { | |
863 | unsigned int flags = 0; | |
e65889c7 | 864 | |
0c842b55 RV |
865 | if (curr_lcla == -EINVAL) |
866 | flags |= LLI_TERM_INT; | |
e65889c7 | 867 | |
0c842b55 RV |
868 | d40_log_lli_lcpa_write(chan->lcpa, |
869 | &lli->dst[lli_current], | |
870 | &lli->src[lli_current], | |
871 | curr_lcla, | |
872 | flags); | |
873 | lli_current++; | |
874 | } | |
6045f0bb RV |
875 | |
876 | if (curr_lcla < 0) | |
4d8673a0 | 877 | goto set_current; |
6045f0bb | 878 | |
e65889c7 RV |
879 | for (; lli_current < lli_len; lli_current++) { |
880 | unsigned int lcla_offset = chan->phy_chan->num * 1024 + | |
881 | 8 * curr_lcla * 2; | |
882 | struct d40_log_lli *lcla = pool->base + lcla_offset; | |
0c842b55 | 883 | unsigned int flags = 0; |
e65889c7 RV |
884 | int next_lcla; |
885 | ||
886 | if (lli_current + 1 < lli_len) | |
887 | next_lcla = d40_lcla_alloc_one(chan, desc); | |
888 | else | |
0c842b55 RV |
889 | next_lcla = linkback ? first_lcla : -EINVAL; |
890 | ||
891 | if (cyclic || next_lcla == -EINVAL) | |
892 | flags |= LLI_TERM_INT; | |
e65889c7 | 893 | |
0c842b55 RV |
894 | if (linkback && curr_lcla == first_lcla) { |
895 | /* First link goes in both LCPA and LCLA */ | |
896 | d40_log_lli_lcpa_write(chan->lcpa, | |
897 | &lli->dst[lli_current], | |
898 | &lli->src[lli_current], | |
899 | next_lcla, flags); | |
900 | } | |
901 | ||
902 | /* | |
903 | * One unused LCLA in the cyclic case if the very first | |
904 | * next_lcla fails... | |
905 | */ | |
e65889c7 RV |
906 | d40_log_lli_lcla_write(lcla, |
907 | &lli->dst[lli_current], | |
908 | &lli->src[lli_current], | |
0c842b55 | 909 | next_lcla, flags); |
e65889c7 | 910 | |
28c7a19d N |
911 | /* |
912 | * Cache maintenance is not needed if lcla is | |
913 | * mapped in esram | |
914 | */ | |
915 | if (!use_esram_lcla) { | |
916 | dma_sync_single_range_for_device(chan->base->dev, | |
917 | pool->dma_addr, lcla_offset, | |
918 | 2 * sizeof(struct d40_log_lli), | |
919 | DMA_TO_DEVICE); | |
920 | } | |
e65889c7 RV |
921 | curr_lcla = next_lcla; |
922 | ||
0c842b55 | 923 | if (curr_lcla == -EINVAL || curr_lcla == first_lcla) { |
e65889c7 RV |
924 | lli_current++; |
925 | break; | |
926 | } | |
927 | } | |
4d8673a0 | 928 | set_current: |
e65889c7 RV |
929 | desc->lli_current = lli_current; |
930 | } | |
698e4732 | 931 | |
e65889c7 RV |
932 | static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d) |
933 | { | |
724a8577 | 934 | if (chan_is_physical(d40c)) { |
1c4b0927 | 935 | d40_phy_lli_load(d40c, d40d); |
698e4732 | 936 | d40d->lli_current = d40d->lli_len; |
e65889c7 RV |
937 | } else |
938 | d40_log_lli_to_lcxa(d40c, d40d); | |
698e4732 JA |
939 | } |
940 | ||
8d318a50 LW |
941 | static struct d40_desc *d40_first_active_get(struct d40_chan *d40c) |
942 | { | |
360af35b | 943 | return list_first_entry_or_null(&d40c->active, struct d40_desc, node); |
8d318a50 LW |
944 | } |
945 | ||
7404368c | 946 | /* remove desc from current queue and add it to the pending_queue */ |
8d318a50 LW |
947 | static void d40_desc_queue(struct d40_chan *d40c, struct d40_desc *desc) |
948 | { | |
7404368c PF |
949 | d40_desc_remove(desc); |
950 | desc->is_in_client_list = false; | |
a8f3067b PF |
951 | list_add_tail(&desc->node, &d40c->pending_queue); |
952 | } | |
953 | ||
954 | static struct d40_desc *d40_first_pending(struct d40_chan *d40c) | |
955 | { | |
360af35b MY |
956 | return list_first_entry_or_null(&d40c->pending_queue, struct d40_desc, |
957 | node); | |
8d318a50 LW |
958 | } |
959 | ||
960 | static struct d40_desc *d40_first_queued(struct d40_chan *d40c) | |
961 | { | |
360af35b | 962 | return list_first_entry_or_null(&d40c->queue, struct d40_desc, node); |
8d318a50 LW |
963 | } |
964 | ||
4226dd86 FB |
965 | static struct d40_desc *d40_first_done(struct d40_chan *d40c) |
966 | { | |
360af35b | 967 | return list_first_entry_or_null(&d40c->done, struct d40_desc, node); |
4226dd86 FB |
968 | } |
969 | ||
d49278e3 PF |
970 | static int d40_psize_2_burst_size(bool is_log, int psize) |
971 | { | |
972 | if (is_log) { | |
973 | if (psize == STEDMA40_PSIZE_LOG_1) | |
974 | return 1; | |
975 | } else { | |
976 | if (psize == STEDMA40_PSIZE_PHY_1) | |
977 | return 1; | |
978 | } | |
979 | ||
980 | return 2 << psize; | |
981 | } | |
982 | ||
983 | /* | |
984 | * The dma only supports transmitting packages up to | |
43f2e1a3 LJ |
985 | * STEDMA40_MAX_SEG_SIZE * data_width, where data_width is stored in Bytes. |
986 | * | |
987 | * Calculate the total number of dma elements required to send the entire sg list. | |
d49278e3 PF |
988 | */ |
989 | static int d40_size_2_dmalen(int size, u32 data_width1, u32 data_width2) | |
990 | { | |
991 | int dmalen; | |
992 | u32 max_w = max(data_width1, data_width2); | |
993 | u32 min_w = min(data_width1, data_width2); | |
43f2e1a3 | 994 | u32 seg_max = ALIGN(STEDMA40_MAX_SEG_SIZE * min_w, max_w); |
d49278e3 PF |
995 | |
996 | if (seg_max > STEDMA40_MAX_SEG_SIZE) | |
43f2e1a3 | 997 | seg_max -= max_w; |
d49278e3 | 998 | |
43f2e1a3 | 999 | if (!IS_ALIGNED(size, max_w)) |
d49278e3 PF |
1000 | return -EINVAL; |
1001 | ||
1002 | if (size <= seg_max) | |
1003 | dmalen = 1; | |
1004 | else { | |
1005 | dmalen = size / seg_max; | |
1006 | if (dmalen * seg_max < size) | |
1007 | dmalen++; | |
1008 | } | |
1009 | return dmalen; | |
1010 | } | |
1011 | ||
1012 | static int d40_sg_2_dmalen(struct scatterlist *sgl, int sg_len, | |
1013 | u32 data_width1, u32 data_width2) | |
1014 | { | |
1015 | struct scatterlist *sg; | |
1016 | int i; | |
1017 | int len = 0; | |
1018 | int ret; | |
1019 | ||
1020 | for_each_sg(sgl, sg, sg_len, i) { | |
1021 | ret = d40_size_2_dmalen(sg_dma_len(sg), | |
1022 | data_width1, data_width2); | |
1023 | if (ret < 0) | |
1024 | return ret; | |
1025 | len += ret; | |
1026 | } | |
1027 | return len; | |
1028 | } | |
8d318a50 | 1029 | |
1bdae6f4 N |
1030 | static int __d40_execute_command_phy(struct d40_chan *d40c, |
1031 | enum d40_command command) | |
8d318a50 | 1032 | { |
767a9675 JA |
1033 | u32 status; |
1034 | int i; | |
8d318a50 LW |
1035 | void __iomem *active_reg; |
1036 | int ret = 0; | |
1037 | unsigned long flags; | |
1d392a7b | 1038 | u32 wmask; |
8d318a50 | 1039 | |
1bdae6f4 N |
1040 | if (command == D40_DMA_STOP) { |
1041 | ret = __d40_execute_command_phy(d40c, D40_DMA_SUSPEND_REQ); | |
1042 | if (ret) | |
1043 | return ret; | |
1044 | } | |
1045 | ||
8d318a50 LW |
1046 | spin_lock_irqsave(&d40c->base->execmd_lock, flags); |
1047 | ||
1048 | if (d40c->phy_chan->num % 2 == 0) | |
1049 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVE; | |
1050 | else | |
1051 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVO; | |
1052 | ||
1053 | if (command == D40_DMA_SUSPEND_REQ) { | |
1054 | status = (readl(active_reg) & | |
1055 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
1056 | D40_CHAN_POS(d40c->phy_chan->num); | |
1057 | ||
1058 | if (status == D40_DMA_SUSPENDED || status == D40_DMA_STOP) | |
b140ea0f | 1059 | goto unlock; |
8d318a50 LW |
1060 | } |
1061 | ||
1d392a7b JA |
1062 | wmask = 0xffffffff & ~(D40_CHAN_POS_MASK(d40c->phy_chan->num)); |
1063 | writel(wmask | (command << D40_CHAN_POS(d40c->phy_chan->num)), | |
1064 | active_reg); | |
8d318a50 LW |
1065 | |
1066 | if (command == D40_DMA_SUSPEND_REQ) { | |
1067 | ||
1068 | for (i = 0 ; i < D40_SUSPEND_MAX_IT; i++) { | |
1069 | status = (readl(active_reg) & | |
1070 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
1071 | D40_CHAN_POS(d40c->phy_chan->num); | |
1072 | ||
1073 | cpu_relax(); | |
1074 | /* | |
1075 | * Reduce the number of bus accesses while | |
1076 | * waiting for the DMA to suspend. | |
1077 | */ | |
1078 | udelay(3); | |
1079 | ||
1080 | if (status == D40_DMA_STOP || | |
1081 | status == D40_DMA_SUSPENDED) | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | if (i == D40_SUSPEND_MAX_IT) { | |
6db5a8ba RV |
1086 | chan_err(d40c, |
1087 | "unable to suspend the chl %d (log: %d) status %x\n", | |
1088 | d40c->phy_chan->num, d40c->log_num, | |
8d318a50 LW |
1089 | status); |
1090 | dump_stack(); | |
1091 | ret = -EBUSY; | |
1092 | } | |
1093 | ||
1094 | } | |
b140ea0f | 1095 | unlock: |
8d318a50 LW |
1096 | spin_unlock_irqrestore(&d40c->base->execmd_lock, flags); |
1097 | return ret; | |
1098 | } | |
1099 | ||
1100 | static void d40_term_all(struct d40_chan *d40c) | |
1101 | { | |
1102 | struct d40_desc *d40d; | |
7404368c | 1103 | struct d40_desc *_d; |
8d318a50 | 1104 | |
4226dd86 FB |
1105 | /* Release completed descriptors */ |
1106 | while ((d40d = d40_first_done(d40c))) { | |
1107 | d40_desc_remove(d40d); | |
1108 | d40_desc_free(d40c, d40d); | |
1109 | } | |
1110 | ||
8d318a50 LW |
1111 | /* Release active descriptors */ |
1112 | while ((d40d = d40_first_active_get(d40c))) { | |
1113 | d40_desc_remove(d40d); | |
8d318a50 LW |
1114 | d40_desc_free(d40c, d40d); |
1115 | } | |
1116 | ||
1117 | /* Release queued descriptors waiting for transfer */ | |
1118 | while ((d40d = d40_first_queued(d40c))) { | |
1119 | d40_desc_remove(d40d); | |
8d318a50 LW |
1120 | d40_desc_free(d40c, d40d); |
1121 | } | |
1122 | ||
a8f3067b PF |
1123 | /* Release pending descriptors */ |
1124 | while ((d40d = d40_first_pending(d40c))) { | |
1125 | d40_desc_remove(d40d); | |
1126 | d40_desc_free(d40c, d40d); | |
1127 | } | |
8d318a50 | 1128 | |
7404368c PF |
1129 | /* Release client owned descriptors */ |
1130 | if (!list_empty(&d40c->client)) | |
1131 | list_for_each_entry_safe(d40d, _d, &d40c->client, node) { | |
1132 | d40_desc_remove(d40d); | |
1133 | d40_desc_free(d40c, d40d); | |
1134 | } | |
1135 | ||
82babbb3 PF |
1136 | /* Release descriptors in prepare queue */ |
1137 | if (!list_empty(&d40c->prepare_queue)) | |
1138 | list_for_each_entry_safe(d40d, _d, | |
1139 | &d40c->prepare_queue, node) { | |
1140 | d40_desc_remove(d40d); | |
1141 | d40_desc_free(d40c, d40d); | |
1142 | } | |
7404368c | 1143 | |
8d318a50 | 1144 | d40c->pending_tx = 0; |
8d318a50 LW |
1145 | } |
1146 | ||
1bdae6f4 N |
1147 | static void __d40_config_set_event(struct d40_chan *d40c, |
1148 | enum d40_events event_type, u32 event, | |
1149 | int reg) | |
262d2915 | 1150 | { |
8ca84687 | 1151 | void __iomem *addr = chan_base(d40c) + reg; |
262d2915 | 1152 | int tries; |
1bdae6f4 N |
1153 | u32 status; |
1154 | ||
1155 | switch (event_type) { | |
1156 | ||
1157 | case D40_DEACTIVATE_EVENTLINE: | |
262d2915 | 1158 | |
262d2915 RV |
1159 | writel((D40_DEACTIVATE_EVENTLINE << D40_EVENTLINE_POS(event)) |
1160 | | ~D40_EVENTLINE_MASK(event), addr); | |
1bdae6f4 N |
1161 | break; |
1162 | ||
1163 | case D40_SUSPEND_REQ_EVENTLINE: | |
1164 | status = (readl(addr) & D40_EVENTLINE_MASK(event)) >> | |
1165 | D40_EVENTLINE_POS(event); | |
1166 | ||
1167 | if (status == D40_DEACTIVATE_EVENTLINE || | |
1168 | status == D40_SUSPEND_REQ_EVENTLINE) | |
1169 | break; | |
262d2915 | 1170 | |
1bdae6f4 N |
1171 | writel((D40_SUSPEND_REQ_EVENTLINE << D40_EVENTLINE_POS(event)) |
1172 | | ~D40_EVENTLINE_MASK(event), addr); | |
1173 | ||
1174 | for (tries = 0 ; tries < D40_SUSPEND_MAX_IT; tries++) { | |
1175 | ||
1176 | status = (readl(addr) & D40_EVENTLINE_MASK(event)) >> | |
1177 | D40_EVENTLINE_POS(event); | |
1178 | ||
1179 | cpu_relax(); | |
1180 | /* | |
1181 | * Reduce the number of bus accesses while | |
1182 | * waiting for the DMA to suspend. | |
1183 | */ | |
1184 | udelay(3); | |
1185 | ||
1186 | if (status == D40_DEACTIVATE_EVENTLINE) | |
1187 | break; | |
1188 | } | |
1189 | ||
1190 | if (tries == D40_SUSPEND_MAX_IT) { | |
1191 | chan_err(d40c, | |
1192 | "unable to stop the event_line chl %d (log: %d)" | |
1193 | "status %x\n", d40c->phy_chan->num, | |
1194 | d40c->log_num, status); | |
1195 | } | |
1196 | break; | |
1197 | ||
1198 | case D40_ACTIVATE_EVENTLINE: | |
262d2915 RV |
1199 | /* |
1200 | * The hardware sometimes doesn't register the enable when src and dst | |
1201 | * event lines are active on the same logical channel. Retry to ensure | |
1202 | * it does. Usually only one retry is sufficient. | |
1203 | */ | |
1bdae6f4 N |
1204 | tries = 100; |
1205 | while (--tries) { | |
1206 | writel((D40_ACTIVATE_EVENTLINE << | |
1207 | D40_EVENTLINE_POS(event)) | | |
1208 | ~D40_EVENTLINE_MASK(event), addr); | |
262d2915 | 1209 | |
1bdae6f4 N |
1210 | if (readl(addr) & D40_EVENTLINE_MASK(event)) |
1211 | break; | |
1212 | } | |
262d2915 | 1213 | |
1bdae6f4 N |
1214 | if (tries != 99) |
1215 | dev_dbg(chan2dev(d40c), | |
1216 | "[%s] workaround enable S%cLNK (%d tries)\n", | |
1217 | __func__, reg == D40_CHAN_REG_SSLNK ? 'S' : 'D', | |
1218 | 100 - tries); | |
262d2915 | 1219 | |
1bdae6f4 N |
1220 | WARN_ON(!tries); |
1221 | break; | |
262d2915 | 1222 | |
1bdae6f4 N |
1223 | case D40_ROUND_EVENTLINE: |
1224 | BUG(); | |
1225 | break; | |
8d318a50 | 1226 | |
1bdae6f4 N |
1227 | } |
1228 | } | |
8d318a50 | 1229 | |
1bdae6f4 N |
1230 | static void d40_config_set_event(struct d40_chan *d40c, |
1231 | enum d40_events event_type) | |
1232 | { | |
26955c07 LJ |
1233 | u32 event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dev_type); |
1234 | ||
8d318a50 | 1235 | /* Enable event line connected to device (or memcpy) */ |
2c2b62d5 LJ |
1236 | if ((d40c->dma_cfg.dir == DMA_DEV_TO_MEM) || |
1237 | (d40c->dma_cfg.dir == DMA_DEV_TO_DEV)) | |
1bdae6f4 | 1238 | __d40_config_set_event(d40c, event_type, event, |
262d2915 | 1239 | D40_CHAN_REG_SSLNK); |
8d318a50 | 1240 | |
2c2b62d5 | 1241 | if (d40c->dma_cfg.dir != DMA_DEV_TO_MEM) |
1bdae6f4 | 1242 | __d40_config_set_event(d40c, event_type, event, |
262d2915 | 1243 | D40_CHAN_REG_SDLNK); |
8d318a50 LW |
1244 | } |
1245 | ||
a5ebca47 | 1246 | static u32 d40_chan_has_events(struct d40_chan *d40c) |
8d318a50 | 1247 | { |
8ca84687 | 1248 | void __iomem *chanbase = chan_base(d40c); |
be8cb7df | 1249 | u32 val; |
8d318a50 | 1250 | |
8ca84687 RV |
1251 | val = readl(chanbase + D40_CHAN_REG_SSLNK); |
1252 | val |= readl(chanbase + D40_CHAN_REG_SDLNK); | |
be8cb7df | 1253 | |
a5ebca47 | 1254 | return val; |
8d318a50 LW |
1255 | } |
1256 | ||
1bdae6f4 N |
1257 | static int |
1258 | __d40_execute_command_log(struct d40_chan *d40c, enum d40_command command) | |
1259 | { | |
1260 | unsigned long flags; | |
1261 | int ret = 0; | |
1262 | u32 active_status; | |
1263 | void __iomem *active_reg; | |
1264 | ||
1265 | if (d40c->phy_chan->num % 2 == 0) | |
1266 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVE; | |
1267 | else | |
1268 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVO; | |
1269 | ||
1270 | ||
1271 | spin_lock_irqsave(&d40c->phy_chan->lock, flags); | |
1272 | ||
1273 | switch (command) { | |
1274 | case D40_DMA_STOP: | |
1275 | case D40_DMA_SUSPEND_REQ: | |
1276 | ||
1277 | active_status = (readl(active_reg) & | |
1278 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
1279 | D40_CHAN_POS(d40c->phy_chan->num); | |
1280 | ||
1281 | if (active_status == D40_DMA_RUN) | |
1282 | d40_config_set_event(d40c, D40_SUSPEND_REQ_EVENTLINE); | |
1283 | else | |
1284 | d40_config_set_event(d40c, D40_DEACTIVATE_EVENTLINE); | |
1285 | ||
1286 | if (!d40_chan_has_events(d40c) && (command == D40_DMA_STOP)) | |
1287 | ret = __d40_execute_command_phy(d40c, command); | |
1288 | ||
1289 | break; | |
1290 | ||
1291 | case D40_DMA_RUN: | |
1292 | ||
1293 | d40_config_set_event(d40c, D40_ACTIVATE_EVENTLINE); | |
1294 | ret = __d40_execute_command_phy(d40c, command); | |
1295 | break; | |
1296 | ||
1297 | case D40_DMA_SUSPENDED: | |
1298 | BUG(); | |
1299 | break; | |
1300 | } | |
1301 | ||
1302 | spin_unlock_irqrestore(&d40c->phy_chan->lock, flags); | |
1303 | return ret; | |
1304 | } | |
1305 | ||
1306 | static int d40_channel_execute_command(struct d40_chan *d40c, | |
1307 | enum d40_command command) | |
1308 | { | |
1309 | if (chan_is_logical(d40c)) | |
1310 | return __d40_execute_command_log(d40c, command); | |
1311 | else | |
1312 | return __d40_execute_command_phy(d40c, command); | |
1313 | } | |
1314 | ||
20a5b6d0 RV |
1315 | static u32 d40_get_prmo(struct d40_chan *d40c) |
1316 | { | |
1317 | static const unsigned int phy_map[] = { | |
1318 | [STEDMA40_PCHAN_BASIC_MODE] | |
1319 | = D40_DREG_PRMO_PCHAN_BASIC, | |
1320 | [STEDMA40_PCHAN_MODULO_MODE] | |
1321 | = D40_DREG_PRMO_PCHAN_MODULO, | |
1322 | [STEDMA40_PCHAN_DOUBLE_DST_MODE] | |
1323 | = D40_DREG_PRMO_PCHAN_DOUBLE_DST, | |
1324 | }; | |
1325 | static const unsigned int log_map[] = { | |
1326 | [STEDMA40_LCHAN_SRC_PHY_DST_LOG] | |
1327 | = D40_DREG_PRMO_LCHAN_SRC_PHY_DST_LOG, | |
1328 | [STEDMA40_LCHAN_SRC_LOG_DST_PHY] | |
1329 | = D40_DREG_PRMO_LCHAN_SRC_LOG_DST_PHY, | |
1330 | [STEDMA40_LCHAN_SRC_LOG_DST_LOG] | |
1331 | = D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG, | |
1332 | }; | |
1333 | ||
724a8577 | 1334 | if (chan_is_physical(d40c)) |
20a5b6d0 RV |
1335 | return phy_map[d40c->dma_cfg.mode_opt]; |
1336 | else | |
1337 | return log_map[d40c->dma_cfg.mode_opt]; | |
1338 | } | |
1339 | ||
b55912c6 | 1340 | static void d40_config_write(struct d40_chan *d40c) |
8d318a50 LW |
1341 | { |
1342 | u32 addr_base; | |
1343 | u32 var; | |
8d318a50 LW |
1344 | |
1345 | /* Odd addresses are even addresses + 4 */ | |
1346 | addr_base = (d40c->phy_chan->num % 2) * 4; | |
1347 | /* Setup channel mode to logical or physical */ | |
724a8577 | 1348 | var = ((u32)(chan_is_logical(d40c)) + 1) << |
8d318a50 LW |
1349 | D40_CHAN_POS(d40c->phy_chan->num); |
1350 | writel(var, d40c->base->virtbase + D40_DREG_PRMSE + addr_base); | |
1351 | ||
1352 | /* Setup operational mode option register */ | |
20a5b6d0 | 1353 | var = d40_get_prmo(d40c) << D40_CHAN_POS(d40c->phy_chan->num); |
8d318a50 LW |
1354 | |
1355 | writel(var, d40c->base->virtbase + D40_DREG_PRMOE + addr_base); | |
1356 | ||
724a8577 | 1357 | if (chan_is_logical(d40c)) { |
8ca84687 RV |
1358 | int lidx = (d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) |
1359 | & D40_SREG_ELEM_LOG_LIDX_MASK; | |
1360 | void __iomem *chanbase = chan_base(d40c); | |
1361 | ||
8d318a50 | 1362 | /* Set default config for CFG reg */ |
8ca84687 RV |
1363 | writel(d40c->src_def_cfg, chanbase + D40_CHAN_REG_SSCFG); |
1364 | writel(d40c->dst_def_cfg, chanbase + D40_CHAN_REG_SDCFG); | |
8d318a50 | 1365 | |
b55912c6 | 1366 | /* Set LIDX for lcla */ |
8ca84687 RV |
1367 | writel(lidx, chanbase + D40_CHAN_REG_SSELT); |
1368 | writel(lidx, chanbase + D40_CHAN_REG_SDELT); | |
e9f3a49c RV |
1369 | |
1370 | /* Clear LNK which will be used by d40_chan_has_events() */ | |
1371 | writel(0, chanbase + D40_CHAN_REG_SSLNK); | |
1372 | writel(0, chanbase + D40_CHAN_REG_SDLNK); | |
8d318a50 | 1373 | } |
8d318a50 LW |
1374 | } |
1375 | ||
aa182ae2 JA |
1376 | static u32 d40_residue(struct d40_chan *d40c) |
1377 | { | |
1378 | u32 num_elt; | |
1379 | ||
724a8577 | 1380 | if (chan_is_logical(d40c)) |
aa182ae2 JA |
1381 | num_elt = (readl(&d40c->lcpa->lcsp2) & D40_MEM_LCSP2_ECNT_MASK) |
1382 | >> D40_MEM_LCSP2_ECNT_POS; | |
8ca84687 RV |
1383 | else { |
1384 | u32 val = readl(chan_base(d40c) + D40_CHAN_REG_SDELT); | |
1385 | num_elt = (val & D40_SREG_ELEM_PHY_ECNT_MASK) | |
1386 | >> D40_SREG_ELEM_PHY_ECNT_POS; | |
1387 | } | |
1388 | ||
43f2e1a3 | 1389 | return num_elt * d40c->dma_cfg.dst_info.data_width; |
aa182ae2 JA |
1390 | } |
1391 | ||
1392 | static bool d40_tx_is_linked(struct d40_chan *d40c) | |
1393 | { | |
1394 | bool is_link; | |
1395 | ||
724a8577 | 1396 | if (chan_is_logical(d40c)) |
aa182ae2 JA |
1397 | is_link = readl(&d40c->lcpa->lcsp3) & D40_MEM_LCSP3_DLOS_MASK; |
1398 | else | |
8ca84687 RV |
1399 | is_link = readl(chan_base(d40c) + D40_CHAN_REG_SDLNK) |
1400 | & D40_SREG_LNK_PHYS_LNK_MASK; | |
1401 | ||
aa182ae2 JA |
1402 | return is_link; |
1403 | } | |
1404 | ||
6f5bad03 | 1405 | static int d40_pause(struct dma_chan *chan) |
aa182ae2 | 1406 | { |
6f5bad03 | 1407 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); |
aa182ae2 JA |
1408 | int res = 0; |
1409 | unsigned long flags; | |
1410 | ||
6f5bad03 MR |
1411 | if (d40c->phy_chan == NULL) { |
1412 | chan_err(d40c, "Channel is not allocated!\n"); | |
1413 | return -EINVAL; | |
1414 | } | |
1415 | ||
3ac012af JA |
1416 | if (!d40c->busy) |
1417 | return 0; | |
1418 | ||
aa182ae2 | 1419 | spin_lock_irqsave(&d40c->lock, flags); |
80245216 | 1420 | pm_runtime_get_sync(d40c->base->dev); |
aa182ae2 JA |
1421 | |
1422 | res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ); | |
1bdae6f4 | 1423 | |
7fb3e75e N |
1424 | pm_runtime_mark_last_busy(d40c->base->dev); |
1425 | pm_runtime_put_autosuspend(d40c->base->dev); | |
aa182ae2 JA |
1426 | spin_unlock_irqrestore(&d40c->lock, flags); |
1427 | return res; | |
1428 | } | |
1429 | ||
6f5bad03 | 1430 | static int d40_resume(struct dma_chan *chan) |
aa182ae2 | 1431 | { |
6f5bad03 | 1432 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); |
aa182ae2 JA |
1433 | int res = 0; |
1434 | unsigned long flags; | |
1435 | ||
6f5bad03 MR |
1436 | if (d40c->phy_chan == NULL) { |
1437 | chan_err(d40c, "Channel is not allocated!\n"); | |
1438 | return -EINVAL; | |
1439 | } | |
1440 | ||
3ac012af JA |
1441 | if (!d40c->busy) |
1442 | return 0; | |
1443 | ||
aa182ae2 | 1444 | spin_lock_irqsave(&d40c->lock, flags); |
7fb3e75e | 1445 | pm_runtime_get_sync(d40c->base->dev); |
aa182ae2 JA |
1446 | |
1447 | /* If bytes left to transfer or linked tx resume job */ | |
1bdae6f4 | 1448 | if (d40_residue(d40c) || d40_tx_is_linked(d40c)) |
aa182ae2 | 1449 | res = d40_channel_execute_command(d40c, D40_DMA_RUN); |
aa182ae2 | 1450 | |
7fb3e75e N |
1451 | pm_runtime_mark_last_busy(d40c->base->dev); |
1452 | pm_runtime_put_autosuspend(d40c->base->dev); | |
aa182ae2 JA |
1453 | spin_unlock_irqrestore(&d40c->lock, flags); |
1454 | return res; | |
1455 | } | |
1456 | ||
8d318a50 LW |
1457 | static dma_cookie_t d40_tx_submit(struct dma_async_tx_descriptor *tx) |
1458 | { | |
1459 | struct d40_chan *d40c = container_of(tx->chan, | |
1460 | struct d40_chan, | |
1461 | chan); | |
1462 | struct d40_desc *d40d = container_of(tx, struct d40_desc, txd); | |
1463 | unsigned long flags; | |
884485e1 | 1464 | dma_cookie_t cookie; |
8d318a50 LW |
1465 | |
1466 | spin_lock_irqsave(&d40c->lock, flags); | |
884485e1 | 1467 | cookie = dma_cookie_assign(tx); |
8d318a50 | 1468 | d40_desc_queue(d40c, d40d); |
8d318a50 LW |
1469 | spin_unlock_irqrestore(&d40c->lock, flags); |
1470 | ||
884485e1 | 1471 | return cookie; |
8d318a50 LW |
1472 | } |
1473 | ||
1474 | static int d40_start(struct d40_chan *d40c) | |
1475 | { | |
0c32269d | 1476 | return d40_channel_execute_command(d40c, D40_DMA_RUN); |
8d318a50 LW |
1477 | } |
1478 | ||
1479 | static struct d40_desc *d40_queue_start(struct d40_chan *d40c) | |
1480 | { | |
1481 | struct d40_desc *d40d; | |
1482 | int err; | |
1483 | ||
1484 | /* Start queued jobs, if any */ | |
1485 | d40d = d40_first_queued(d40c); | |
1486 | ||
1487 | if (d40d != NULL) { | |
1bdae6f4 | 1488 | if (!d40c->busy) { |
7fb3e75e | 1489 | d40c->busy = true; |
1bdae6f4 N |
1490 | pm_runtime_get_sync(d40c->base->dev); |
1491 | } | |
8d318a50 LW |
1492 | |
1493 | /* Remove from queue */ | |
1494 | d40_desc_remove(d40d); | |
1495 | ||
1496 | /* Add to active queue */ | |
1497 | d40_desc_submit(d40c, d40d); | |
1498 | ||
7d83a854 RV |
1499 | /* Initiate DMA job */ |
1500 | d40_desc_load(d40c, d40d); | |
8d318a50 | 1501 | |
7d83a854 RV |
1502 | /* Start dma job */ |
1503 | err = d40_start(d40c); | |
8d318a50 | 1504 | |
7d83a854 RV |
1505 | if (err) |
1506 | return NULL; | |
8d318a50 LW |
1507 | } |
1508 | ||
1509 | return d40d; | |
1510 | } | |
1511 | ||
1512 | /* called from interrupt context */ | |
1513 | static void dma_tc_handle(struct d40_chan *d40c) | |
1514 | { | |
1515 | struct d40_desc *d40d; | |
1516 | ||
8d318a50 LW |
1517 | /* Get first active entry from list */ |
1518 | d40d = d40_first_active_get(d40c); | |
1519 | ||
1520 | if (d40d == NULL) | |
1521 | return; | |
1522 | ||
0c842b55 RV |
1523 | if (d40d->cyclic) { |
1524 | /* | |
1525 | * If this was a paritially loaded list, we need to reloaded | |
1526 | * it, and only when the list is completed. We need to check | |
1527 | * for done because the interrupt will hit for every link, and | |
1528 | * not just the last one. | |
1529 | */ | |
1530 | if (d40d->lli_current < d40d->lli_len | |
1531 | && !d40_tx_is_linked(d40c) | |
1532 | && !d40_residue(d40c)) { | |
1533 | d40_lcla_free_all(d40c, d40d); | |
1534 | d40_desc_load(d40c, d40d); | |
1535 | (void) d40_start(d40c); | |
8d318a50 | 1536 | |
0c842b55 RV |
1537 | if (d40d->lli_current == d40d->lli_len) |
1538 | d40d->lli_current = 0; | |
1539 | } | |
1540 | } else { | |
1541 | d40_lcla_free_all(d40c, d40d); | |
8d318a50 | 1542 | |
0c842b55 RV |
1543 | if (d40d->lli_current < d40d->lli_len) { |
1544 | d40_desc_load(d40c, d40d); | |
1545 | /* Start dma job */ | |
1546 | (void) d40_start(d40c); | |
1547 | return; | |
1548 | } | |
1549 | ||
9ecb41bd | 1550 | if (d40_queue_start(d40c) == NULL) { |
0c842b55 | 1551 | d40c->busy = false; |
9ecb41bd RV |
1552 | |
1553 | pm_runtime_mark_last_busy(d40c->base->dev); | |
1554 | pm_runtime_put_autosuspend(d40c->base->dev); | |
1555 | } | |
8d318a50 | 1556 | |
7dd14525 FB |
1557 | d40_desc_remove(d40d); |
1558 | d40_desc_done(d40c, d40d); | |
1559 | } | |
4226dd86 | 1560 | |
8d318a50 LW |
1561 | d40c->pending_tx++; |
1562 | tasklet_schedule(&d40c->tasklet); | |
1563 | ||
1564 | } | |
1565 | ||
1566 | static void dma_tasklet(unsigned long data) | |
1567 | { | |
1568 | struct d40_chan *d40c = (struct d40_chan *) data; | |
767a9675 | 1569 | struct d40_desc *d40d; |
8d318a50 | 1570 | unsigned long flags; |
e9baa9d9 | 1571 | bool callback_active; |
3a315d5d | 1572 | struct dmaengine_desc_callback cb; |
8d318a50 LW |
1573 | |
1574 | spin_lock_irqsave(&d40c->lock, flags); | |
1575 | ||
4226dd86 FB |
1576 | /* Get first entry from the done list */ |
1577 | d40d = d40_first_done(d40c); | |
1578 | if (d40d == NULL) { | |
1579 | /* Check if we have reached here for cyclic job */ | |
1580 | d40d = d40_first_active_get(d40c); | |
1581 | if (d40d == NULL || !d40d->cyclic) | |
d4cd217a | 1582 | goto check_pending_tx; |
4226dd86 | 1583 | } |
8d318a50 | 1584 | |
0c842b55 | 1585 | if (!d40d->cyclic) |
f7fbce07 | 1586 | dma_cookie_complete(&d40d->txd); |
8d318a50 LW |
1587 | |
1588 | /* | |
1589 | * If terminating a channel pending_tx is set to zero. | |
1590 | * This prevents any finished active jobs to return to the client. | |
1591 | */ | |
1592 | if (d40c->pending_tx == 0) { | |
1593 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1594 | return; | |
1595 | } | |
1596 | ||
1597 | /* Callback to client */ | |
e9baa9d9 | 1598 | callback_active = !!(d40d->txd.flags & DMA_PREP_INTERRUPT); |
3a315d5d | 1599 | dmaengine_desc_get_callback(&d40d->txd, &cb); |
767a9675 | 1600 | |
0c842b55 RV |
1601 | if (!d40d->cyclic) { |
1602 | if (async_tx_test_ack(&d40d->txd)) { | |
767a9675 | 1603 | d40_desc_remove(d40d); |
0c842b55 | 1604 | d40_desc_free(d40c, d40d); |
f26e03ad FB |
1605 | } else if (!d40d->is_in_client_list) { |
1606 | d40_desc_remove(d40d); | |
1607 | d40_lcla_free_all(d40c, d40d); | |
1608 | list_add_tail(&d40d->node, &d40c->client); | |
1609 | d40d->is_in_client_list = true; | |
8d318a50 LW |
1610 | } |
1611 | } | |
1612 | ||
1613 | d40c->pending_tx--; | |
1614 | ||
1615 | if (d40c->pending_tx) | |
1616 | tasklet_schedule(&d40c->tasklet); | |
1617 | ||
1618 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1619 | ||
3a315d5d DJ |
1620 | if (callback_active) |
1621 | dmaengine_desc_callback_invoke(&cb, NULL); | |
8d318a50 LW |
1622 | |
1623 | return; | |
d4cd217a | 1624 | check_pending_tx: |
1bdae6f4 | 1625 | /* Rescue manouver if receiving double interrupts */ |
8d318a50 LW |
1626 | if (d40c->pending_tx > 0) |
1627 | d40c->pending_tx--; | |
1628 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1629 | } | |
1630 | ||
1631 | static irqreturn_t d40_handle_interrupt(int irq, void *data) | |
1632 | { | |
8d318a50 | 1633 | int i; |
8d318a50 LW |
1634 | u32 idx; |
1635 | u32 row; | |
1636 | long chan = -1; | |
1637 | struct d40_chan *d40c; | |
1638 | unsigned long flags; | |
1639 | struct d40_base *base = data; | |
3cb645dc TL |
1640 | u32 regs[base->gen_dmac.il_size]; |
1641 | struct d40_interrupt_lookup *il = base->gen_dmac.il; | |
1642 | u32 il_size = base->gen_dmac.il_size; | |
8d318a50 LW |
1643 | |
1644 | spin_lock_irqsave(&base->interrupt_lock, flags); | |
1645 | ||
1646 | /* Read interrupt status of both logical and physical channels */ | |
3cb645dc | 1647 | for (i = 0; i < il_size; i++) |
8d318a50 LW |
1648 | regs[i] = readl(base->virtbase + il[i].src); |
1649 | ||
1650 | for (;;) { | |
1651 | ||
1652 | chan = find_next_bit((unsigned long *)regs, | |
3cb645dc | 1653 | BITS_PER_LONG * il_size, chan + 1); |
8d318a50 LW |
1654 | |
1655 | /* No more set bits found? */ | |
3cb645dc | 1656 | if (chan == BITS_PER_LONG * il_size) |
8d318a50 LW |
1657 | break; |
1658 | ||
1659 | row = chan / BITS_PER_LONG; | |
1660 | idx = chan & (BITS_PER_LONG - 1); | |
1661 | ||
8d318a50 LW |
1662 | if (il[row].offset == D40_PHY_CHAN) |
1663 | d40c = base->lookup_phy_chans[idx]; | |
1664 | else | |
1665 | d40c = base->lookup_log_chans[il[row].offset + idx]; | |
53d6d68f FB |
1666 | |
1667 | if (!d40c) { | |
1668 | /* | |
1669 | * No error because this can happen if something else | |
1670 | * in the system is using the channel. | |
1671 | */ | |
1672 | continue; | |
1673 | } | |
1674 | ||
1675 | /* ACK interrupt */ | |
8a3b6e14 | 1676 | writel(BIT(idx), base->virtbase + il[row].clr); |
53d6d68f | 1677 | |
8d318a50 LW |
1678 | spin_lock(&d40c->lock); |
1679 | ||
1680 | if (!il[row].is_error) | |
1681 | dma_tc_handle(d40c); | |
1682 | else | |
6db5a8ba RV |
1683 | d40_err(base->dev, "IRQ chan: %ld offset %d idx %d\n", |
1684 | chan, il[row].offset, idx); | |
8d318a50 LW |
1685 | |
1686 | spin_unlock(&d40c->lock); | |
1687 | } | |
1688 | ||
1689 | spin_unlock_irqrestore(&base->interrupt_lock, flags); | |
1690 | ||
1691 | return IRQ_HANDLED; | |
1692 | } | |
1693 | ||
8d318a50 LW |
1694 | static int d40_validate_conf(struct d40_chan *d40c, |
1695 | struct stedma40_chan_cfg *conf) | |
1696 | { | |
1697 | int res = 0; | |
38bdbf02 | 1698 | bool is_log = conf->mode == STEDMA40_MODE_LOGICAL; |
8d318a50 | 1699 | |
0747c7ba | 1700 | if (!conf->dir) { |
6db5a8ba | 1701 | chan_err(d40c, "Invalid direction.\n"); |
0747c7ba LW |
1702 | res = -EINVAL; |
1703 | } | |
1704 | ||
26955c07 LJ |
1705 | if ((is_log && conf->dev_type > d40c->base->num_log_chans) || |
1706 | (!is_log && conf->dev_type > d40c->base->num_phy_chans) || | |
1707 | (conf->dev_type < 0)) { | |
1708 | chan_err(d40c, "Invalid device type (%d)\n", conf->dev_type); | |
0747c7ba LW |
1709 | res = -EINVAL; |
1710 | } | |
1711 | ||
2c2b62d5 | 1712 | if (conf->dir == DMA_DEV_TO_DEV) { |
8d318a50 LW |
1713 | /* |
1714 | * DMAC HW supports it. Will be added to this driver, | |
1715 | * in case any dma client requires it. | |
1716 | */ | |
6db5a8ba | 1717 | chan_err(d40c, "periph to periph not supported\n"); |
8d318a50 LW |
1718 | res = -EINVAL; |
1719 | } | |
1720 | ||
d49278e3 | 1721 | if (d40_psize_2_burst_size(is_log, conf->src_info.psize) * |
43f2e1a3 | 1722 | conf->src_info.data_width != |
d49278e3 | 1723 | d40_psize_2_burst_size(is_log, conf->dst_info.psize) * |
43f2e1a3 | 1724 | conf->dst_info.data_width) { |
d49278e3 PF |
1725 | /* |
1726 | * The DMAC hardware only supports | |
1727 | * src (burst x width) == dst (burst x width) | |
1728 | */ | |
1729 | ||
6db5a8ba | 1730 | chan_err(d40c, "src (burst x width) != dst (burst x width)\n"); |
d49278e3 PF |
1731 | res = -EINVAL; |
1732 | } | |
1733 | ||
8d318a50 LW |
1734 | return res; |
1735 | } | |
1736 | ||
5cd326fd N |
1737 | static bool d40_alloc_mask_set(struct d40_phy_res *phy, |
1738 | bool is_src, int log_event_line, bool is_log, | |
1739 | bool *first_user) | |
8d318a50 LW |
1740 | { |
1741 | unsigned long flags; | |
1742 | spin_lock_irqsave(&phy->lock, flags); | |
5cd326fd N |
1743 | |
1744 | *first_user = ((phy->allocated_src | phy->allocated_dst) | |
1745 | == D40_ALLOC_FREE); | |
1746 | ||
4aed79b2 | 1747 | if (!is_log) { |
8d318a50 LW |
1748 | /* Physical interrupts are masked per physical full channel */ |
1749 | if (phy->allocated_src == D40_ALLOC_FREE && | |
1750 | phy->allocated_dst == D40_ALLOC_FREE) { | |
1751 | phy->allocated_dst = D40_ALLOC_PHY; | |
1752 | phy->allocated_src = D40_ALLOC_PHY; | |
8eff80e4 | 1753 | goto found_unlock; |
8d318a50 | 1754 | } else |
8eff80e4 | 1755 | goto not_found_unlock; |
8d318a50 LW |
1756 | } |
1757 | ||
1758 | /* Logical channel */ | |
1759 | if (is_src) { | |
1760 | if (phy->allocated_src == D40_ALLOC_PHY) | |
8eff80e4 | 1761 | goto not_found_unlock; |
8d318a50 LW |
1762 | |
1763 | if (phy->allocated_src == D40_ALLOC_FREE) | |
1764 | phy->allocated_src = D40_ALLOC_LOG_FREE; | |
1765 | ||
8a3b6e14 LJ |
1766 | if (!(phy->allocated_src & BIT(log_event_line))) { |
1767 | phy->allocated_src |= BIT(log_event_line); | |
8eff80e4 | 1768 | goto found_unlock; |
8d318a50 | 1769 | } else |
8eff80e4 | 1770 | goto not_found_unlock; |
8d318a50 LW |
1771 | } else { |
1772 | if (phy->allocated_dst == D40_ALLOC_PHY) | |
8eff80e4 | 1773 | goto not_found_unlock; |
8d318a50 LW |
1774 | |
1775 | if (phy->allocated_dst == D40_ALLOC_FREE) | |
1776 | phy->allocated_dst = D40_ALLOC_LOG_FREE; | |
1777 | ||
8a3b6e14 LJ |
1778 | if (!(phy->allocated_dst & BIT(log_event_line))) { |
1779 | phy->allocated_dst |= BIT(log_event_line); | |
8eff80e4 ME |
1780 | goto found_unlock; |
1781 | } | |
8d318a50 | 1782 | } |
8eff80e4 | 1783 | not_found_unlock: |
8d318a50 LW |
1784 | spin_unlock_irqrestore(&phy->lock, flags); |
1785 | return false; | |
8eff80e4 | 1786 | found_unlock: |
8d318a50 LW |
1787 | spin_unlock_irqrestore(&phy->lock, flags); |
1788 | return true; | |
1789 | } | |
1790 | ||
1791 | static bool d40_alloc_mask_free(struct d40_phy_res *phy, bool is_src, | |
1792 | int log_event_line) | |
1793 | { | |
1794 | unsigned long flags; | |
1795 | bool is_free = false; | |
1796 | ||
1797 | spin_lock_irqsave(&phy->lock, flags); | |
1798 | if (!log_event_line) { | |
8d318a50 LW |
1799 | phy->allocated_dst = D40_ALLOC_FREE; |
1800 | phy->allocated_src = D40_ALLOC_FREE; | |
1801 | is_free = true; | |
f19b8ee8 | 1802 | goto unlock; |
8d318a50 LW |
1803 | } |
1804 | ||
1805 | /* Logical channel */ | |
1806 | if (is_src) { | |
8a3b6e14 | 1807 | phy->allocated_src &= ~BIT(log_event_line); |
8d318a50 LW |
1808 | if (phy->allocated_src == D40_ALLOC_LOG_FREE) |
1809 | phy->allocated_src = D40_ALLOC_FREE; | |
1810 | } else { | |
8a3b6e14 | 1811 | phy->allocated_dst &= ~BIT(log_event_line); |
8d318a50 LW |
1812 | if (phy->allocated_dst == D40_ALLOC_LOG_FREE) |
1813 | phy->allocated_dst = D40_ALLOC_FREE; | |
1814 | } | |
1815 | ||
1816 | is_free = ((phy->allocated_src | phy->allocated_dst) == | |
1817 | D40_ALLOC_FREE); | |
f19b8ee8 | 1818 | unlock: |
8d318a50 LW |
1819 | spin_unlock_irqrestore(&phy->lock, flags); |
1820 | ||
1821 | return is_free; | |
1822 | } | |
1823 | ||
5cd326fd | 1824 | static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user) |
8d318a50 | 1825 | { |
26955c07 | 1826 | int dev_type = d40c->dma_cfg.dev_type; |
8d318a50 LW |
1827 | int event_group; |
1828 | int event_line; | |
1829 | struct d40_phy_res *phys; | |
1830 | int i; | |
1831 | int j; | |
1832 | int log_num; | |
f000df8c | 1833 | int num_phy_chans; |
8d318a50 | 1834 | bool is_src; |
38bdbf02 | 1835 | bool is_log = d40c->dma_cfg.mode == STEDMA40_MODE_LOGICAL; |
8d318a50 LW |
1836 | |
1837 | phys = d40c->base->phy_res; | |
f000df8c | 1838 | num_phy_chans = d40c->base->num_phy_chans; |
8d318a50 | 1839 | |
2c2b62d5 | 1840 | if (d40c->dma_cfg.dir == DMA_DEV_TO_MEM) { |
8d318a50 LW |
1841 | log_num = 2 * dev_type; |
1842 | is_src = true; | |
2c2b62d5 LJ |
1843 | } else if (d40c->dma_cfg.dir == DMA_MEM_TO_DEV || |
1844 | d40c->dma_cfg.dir == DMA_MEM_TO_MEM) { | |
8d318a50 | 1845 | /* dst event lines are used for logical memcpy */ |
8d318a50 LW |
1846 | log_num = 2 * dev_type + 1; |
1847 | is_src = false; | |
1848 | } else | |
1849 | return -EINVAL; | |
1850 | ||
1851 | event_group = D40_TYPE_TO_GROUP(dev_type); | |
1852 | event_line = D40_TYPE_TO_EVENT(dev_type); | |
1853 | ||
1854 | if (!is_log) { | |
2c2b62d5 | 1855 | if (d40c->dma_cfg.dir == DMA_MEM_TO_MEM) { |
8d318a50 | 1856 | /* Find physical half channel */ |
f000df8c GB |
1857 | if (d40c->dma_cfg.use_fixed_channel) { |
1858 | i = d40c->dma_cfg.phy_channel; | |
4aed79b2 | 1859 | if (d40_alloc_mask_set(&phys[i], is_src, |
5cd326fd N |
1860 | 0, is_log, |
1861 | first_phy_user)) | |
8d318a50 | 1862 | goto found_phy; |
f000df8c GB |
1863 | } else { |
1864 | for (i = 0; i < num_phy_chans; i++) { | |
1865 | if (d40_alloc_mask_set(&phys[i], is_src, | |
1866 | 0, is_log, | |
1867 | first_phy_user)) | |
1868 | goto found_phy; | |
1869 | } | |
8d318a50 LW |
1870 | } |
1871 | } else | |
1872 | for (j = 0; j < d40c->base->num_phy_chans; j += 8) { | |
1873 | int phy_num = j + event_group * 2; | |
1874 | for (i = phy_num; i < phy_num + 2; i++) { | |
508849ad LW |
1875 | if (d40_alloc_mask_set(&phys[i], |
1876 | is_src, | |
1877 | 0, | |
5cd326fd N |
1878 | is_log, |
1879 | first_phy_user)) | |
8d318a50 LW |
1880 | goto found_phy; |
1881 | } | |
1882 | } | |
1883 | return -EINVAL; | |
1884 | found_phy: | |
1885 | d40c->phy_chan = &phys[i]; | |
1886 | d40c->log_num = D40_PHY_CHAN; | |
1887 | goto out; | |
1888 | } | |
1889 | if (dev_type == -1) | |
1890 | return -EINVAL; | |
1891 | ||
1892 | /* Find logical channel */ | |
1893 | for (j = 0; j < d40c->base->num_phy_chans; j += 8) { | |
1894 | int phy_num = j + event_group * 2; | |
5cd326fd N |
1895 | |
1896 | if (d40c->dma_cfg.use_fixed_channel) { | |
1897 | i = d40c->dma_cfg.phy_channel; | |
1898 | ||
1899 | if ((i != phy_num) && (i != phy_num + 1)) { | |
1900 | dev_err(chan2dev(d40c), | |
1901 | "invalid fixed phy channel %d\n", i); | |
1902 | return -EINVAL; | |
1903 | } | |
1904 | ||
1905 | if (d40_alloc_mask_set(&phys[i], is_src, event_line, | |
1906 | is_log, first_phy_user)) | |
1907 | goto found_log; | |
1908 | ||
1909 | dev_err(chan2dev(d40c), | |
1910 | "could not allocate fixed phy channel %d\n", i); | |
1911 | return -EINVAL; | |
1912 | } | |
1913 | ||
8d318a50 LW |
1914 | /* |
1915 | * Spread logical channels across all available physical rather | |
1916 | * than pack every logical channel at the first available phy | |
1917 | * channels. | |
1918 | */ | |
1919 | if (is_src) { | |
1920 | for (i = phy_num; i < phy_num + 2; i++) { | |
1921 | if (d40_alloc_mask_set(&phys[i], is_src, | |
5cd326fd N |
1922 | event_line, is_log, |
1923 | first_phy_user)) | |
8d318a50 LW |
1924 | goto found_log; |
1925 | } | |
1926 | } else { | |
1927 | for (i = phy_num + 1; i >= phy_num; i--) { | |
1928 | if (d40_alloc_mask_set(&phys[i], is_src, | |
5cd326fd N |
1929 | event_line, is_log, |
1930 | first_phy_user)) | |
8d318a50 LW |
1931 | goto found_log; |
1932 | } | |
1933 | } | |
1934 | } | |
1935 | return -EINVAL; | |
1936 | ||
1937 | found_log: | |
1938 | d40c->phy_chan = &phys[i]; | |
1939 | d40c->log_num = log_num; | |
1940 | out: | |
1941 | ||
1942 | if (is_log) | |
1943 | d40c->base->lookup_log_chans[d40c->log_num] = d40c; | |
1944 | else | |
1945 | d40c->base->lookup_phy_chans[d40c->phy_chan->num] = d40c; | |
1946 | ||
1947 | return 0; | |
1948 | ||
1949 | } | |
1950 | ||
8d318a50 LW |
1951 | static int d40_config_memcpy(struct d40_chan *d40c) |
1952 | { | |
1953 | dma_cap_mask_t cap = d40c->chan.device->cap_mask; | |
1954 | ||
1955 | if (dma_has_cap(DMA_MEMCPY, cap) && !dma_has_cap(DMA_SLAVE, cap)) { | |
29027a1e | 1956 | d40c->dma_cfg = dma40_memcpy_conf_log; |
26955c07 | 1957 | d40c->dma_cfg.dev_type = dma40_memcpy_channels[d40c->chan.chan_id]; |
8d318a50 | 1958 | |
9b233f9b LJ |
1959 | d40_log_cfg(&d40c->dma_cfg, |
1960 | &d40c->log_def.lcsp1, &d40c->log_def.lcsp3); | |
1961 | ||
8d318a50 LW |
1962 | } else if (dma_has_cap(DMA_MEMCPY, cap) && |
1963 | dma_has_cap(DMA_SLAVE, cap)) { | |
29027a1e | 1964 | d40c->dma_cfg = dma40_memcpy_conf_phy; |
57e65ad7 LJ |
1965 | |
1966 | /* Generate interrrupt at end of transfer or relink. */ | |
1967 | d40c->dst_def_cfg |= BIT(D40_SREG_CFG_TIM_POS); | |
1968 | ||
1969 | /* Generate interrupt on error. */ | |
1970 | d40c->src_def_cfg |= BIT(D40_SREG_CFG_EIM_POS); | |
1971 | d40c->dst_def_cfg |= BIT(D40_SREG_CFG_EIM_POS); | |
1972 | ||
8d318a50 | 1973 | } else { |
6db5a8ba | 1974 | chan_err(d40c, "No memcpy\n"); |
8d318a50 LW |
1975 | return -EINVAL; |
1976 | } | |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
8d318a50 LW |
1981 | static int d40_free_dma(struct d40_chan *d40c) |
1982 | { | |
1983 | ||
1984 | int res = 0; | |
26955c07 | 1985 | u32 event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dev_type); |
8d318a50 LW |
1986 | struct d40_phy_res *phy = d40c->phy_chan; |
1987 | bool is_src; | |
1988 | ||
1989 | /* Terminate all queued and active transfers */ | |
1990 | d40_term_all(d40c); | |
1991 | ||
1992 | if (phy == NULL) { | |
6db5a8ba | 1993 | chan_err(d40c, "phy == null\n"); |
8d318a50 LW |
1994 | return -EINVAL; |
1995 | } | |
1996 | ||
1997 | if (phy->allocated_src == D40_ALLOC_FREE && | |
1998 | phy->allocated_dst == D40_ALLOC_FREE) { | |
6db5a8ba | 1999 | chan_err(d40c, "channel already free\n"); |
8d318a50 LW |
2000 | return -EINVAL; |
2001 | } | |
2002 | ||
2c2b62d5 LJ |
2003 | if (d40c->dma_cfg.dir == DMA_MEM_TO_DEV || |
2004 | d40c->dma_cfg.dir == DMA_MEM_TO_MEM) | |
8d318a50 | 2005 | is_src = false; |
2c2b62d5 | 2006 | else if (d40c->dma_cfg.dir == DMA_DEV_TO_MEM) |
8d318a50 | 2007 | is_src = true; |
26955c07 | 2008 | else { |
6db5a8ba | 2009 | chan_err(d40c, "Unknown direction\n"); |
8d318a50 LW |
2010 | return -EINVAL; |
2011 | } | |
2012 | ||
7fb3e75e | 2013 | pm_runtime_get_sync(d40c->base->dev); |
1bdae6f4 | 2014 | res = d40_channel_execute_command(d40c, D40_DMA_STOP); |
d181b3a8 | 2015 | if (res) { |
1bdae6f4 | 2016 | chan_err(d40c, "stop failed\n"); |
e714b470 | 2017 | goto mark_last_busy; |
d181b3a8 JA |
2018 | } |
2019 | ||
1bdae6f4 | 2020 | d40_alloc_mask_free(phy, is_src, chan_is_logical(d40c) ? event : 0); |
8d318a50 | 2021 | |
1bdae6f4 | 2022 | if (chan_is_logical(d40c)) |
8d318a50 | 2023 | d40c->base->lookup_log_chans[d40c->log_num] = NULL; |
1bdae6f4 N |
2024 | else |
2025 | d40c->base->lookup_phy_chans[phy->num] = NULL; | |
7fb3e75e N |
2026 | |
2027 | if (d40c->busy) { | |
2028 | pm_runtime_mark_last_busy(d40c->base->dev); | |
2029 | pm_runtime_put_autosuspend(d40c->base->dev); | |
2030 | } | |
2031 | ||
2032 | d40c->busy = false; | |
8d318a50 | 2033 | d40c->phy_chan = NULL; |
ce2ca125 | 2034 | d40c->configured = false; |
e714b470 | 2035 | mark_last_busy: |
7fb3e75e N |
2036 | pm_runtime_mark_last_busy(d40c->base->dev); |
2037 | pm_runtime_put_autosuspend(d40c->base->dev); | |
2038 | return res; | |
8d318a50 LW |
2039 | } |
2040 | ||
a5ebca47 JA |
2041 | static bool d40_is_paused(struct d40_chan *d40c) |
2042 | { | |
8ca84687 | 2043 | void __iomem *chanbase = chan_base(d40c); |
a5ebca47 JA |
2044 | bool is_paused = false; |
2045 | unsigned long flags; | |
2046 | void __iomem *active_reg; | |
2047 | u32 status; | |
26955c07 | 2048 | u32 event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dev_type); |
a5ebca47 JA |
2049 | |
2050 | spin_lock_irqsave(&d40c->lock, flags); | |
2051 | ||
724a8577 | 2052 | if (chan_is_physical(d40c)) { |
a5ebca47 JA |
2053 | if (d40c->phy_chan->num % 2 == 0) |
2054 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVE; | |
2055 | else | |
2056 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVO; | |
2057 | ||
2058 | status = (readl(active_reg) & | |
2059 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
2060 | D40_CHAN_POS(d40c->phy_chan->num); | |
2061 | if (status == D40_DMA_SUSPENDED || status == D40_DMA_STOP) | |
2062 | is_paused = true; | |
5a5eecb3 | 2063 | goto unlock; |
a5ebca47 JA |
2064 | } |
2065 | ||
2c2b62d5 LJ |
2066 | if (d40c->dma_cfg.dir == DMA_MEM_TO_DEV || |
2067 | d40c->dma_cfg.dir == DMA_MEM_TO_MEM) { | |
8ca84687 | 2068 | status = readl(chanbase + D40_CHAN_REG_SDLNK); |
2c2b62d5 | 2069 | } else if (d40c->dma_cfg.dir == DMA_DEV_TO_MEM) { |
8ca84687 | 2070 | status = readl(chanbase + D40_CHAN_REG_SSLNK); |
9dbfbd35 | 2071 | } else { |
6db5a8ba | 2072 | chan_err(d40c, "Unknown direction\n"); |
5a5eecb3 | 2073 | goto unlock; |
a5ebca47 | 2074 | } |
9dbfbd35 | 2075 | |
a5ebca47 JA |
2076 | status = (status & D40_EVENTLINE_MASK(event)) >> |
2077 | D40_EVENTLINE_POS(event); | |
2078 | ||
2079 | if (status != D40_DMA_RUN) | |
2080 | is_paused = true; | |
5a5eecb3 | 2081 | unlock: |
a5ebca47 JA |
2082 | spin_unlock_irqrestore(&d40c->lock, flags); |
2083 | return is_paused; | |
2084 | ||
2085 | } | |
2086 | ||
8d318a50 LW |
2087 | static u32 stedma40_residue(struct dma_chan *chan) |
2088 | { | |
2089 | struct d40_chan *d40c = | |
2090 | container_of(chan, struct d40_chan, chan); | |
2091 | u32 bytes_left; | |
2092 | unsigned long flags; | |
2093 | ||
2094 | spin_lock_irqsave(&d40c->lock, flags); | |
2095 | bytes_left = d40_residue(d40c); | |
2096 | spin_unlock_irqrestore(&d40c->lock, flags); | |
2097 | ||
2098 | return bytes_left; | |
2099 | } | |
2100 | ||
3e3a0763 RV |
2101 | static int |
2102 | d40_prep_sg_log(struct d40_chan *chan, struct d40_desc *desc, | |
2103 | struct scatterlist *sg_src, struct scatterlist *sg_dst, | |
822c5676 RV |
2104 | unsigned int sg_len, dma_addr_t src_dev_addr, |
2105 | dma_addr_t dst_dev_addr) | |
3e3a0763 RV |
2106 | { |
2107 | struct stedma40_chan_cfg *cfg = &chan->dma_cfg; | |
2108 | struct stedma40_half_channel_info *src_info = &cfg->src_info; | |
2109 | struct stedma40_half_channel_info *dst_info = &cfg->dst_info; | |
5ed04b85 | 2110 | int ret; |
3e3a0763 | 2111 | |
5ed04b85 RV |
2112 | ret = d40_log_sg_to_lli(sg_src, sg_len, |
2113 | src_dev_addr, | |
2114 | desc->lli_log.src, | |
2115 | chan->log_def.lcsp1, | |
2116 | src_info->data_width, | |
2117 | dst_info->data_width); | |
2118 | ||
2119 | ret = d40_log_sg_to_lli(sg_dst, sg_len, | |
2120 | dst_dev_addr, | |
2121 | desc->lli_log.dst, | |
2122 | chan->log_def.lcsp3, | |
2123 | dst_info->data_width, | |
2124 | src_info->data_width); | |
2125 | ||
2126 | return ret < 0 ? ret : 0; | |
3e3a0763 RV |
2127 | } |
2128 | ||
2129 | static int | |
2130 | d40_prep_sg_phy(struct d40_chan *chan, struct d40_desc *desc, | |
2131 | struct scatterlist *sg_src, struct scatterlist *sg_dst, | |
822c5676 RV |
2132 | unsigned int sg_len, dma_addr_t src_dev_addr, |
2133 | dma_addr_t dst_dev_addr) | |
3e3a0763 | 2134 | { |
3e3a0763 RV |
2135 | struct stedma40_chan_cfg *cfg = &chan->dma_cfg; |
2136 | struct stedma40_half_channel_info *src_info = &cfg->src_info; | |
2137 | struct stedma40_half_channel_info *dst_info = &cfg->dst_info; | |
0c842b55 | 2138 | unsigned long flags = 0; |
3e3a0763 RV |
2139 | int ret; |
2140 | ||
0c842b55 RV |
2141 | if (desc->cyclic) |
2142 | flags |= LLI_CYCLIC | LLI_TERM_INT; | |
2143 | ||
3e3a0763 RV |
2144 | ret = d40_phy_sg_to_lli(sg_src, sg_len, src_dev_addr, |
2145 | desc->lli_phy.src, | |
2146 | virt_to_phys(desc->lli_phy.src), | |
2147 | chan->src_def_cfg, | |
0c842b55 | 2148 | src_info, dst_info, flags); |
3e3a0763 RV |
2149 | |
2150 | ret = d40_phy_sg_to_lli(sg_dst, sg_len, dst_dev_addr, | |
2151 | desc->lli_phy.dst, | |
2152 | virt_to_phys(desc->lli_phy.dst), | |
2153 | chan->dst_def_cfg, | |
0c842b55 | 2154 | dst_info, src_info, flags); |
3e3a0763 RV |
2155 | |
2156 | dma_sync_single_for_device(chan->base->dev, desc->lli_pool.dma_addr, | |
2157 | desc->lli_pool.size, DMA_TO_DEVICE); | |
2158 | ||
2159 | return ret < 0 ? ret : 0; | |
2160 | } | |
2161 | ||
5f81158f RV |
2162 | static struct d40_desc * |
2163 | d40_prep_desc(struct d40_chan *chan, struct scatterlist *sg, | |
2164 | unsigned int sg_len, unsigned long dma_flags) | |
2165 | { | |
86145910 | 2166 | struct stedma40_chan_cfg *cfg; |
5f81158f | 2167 | struct d40_desc *desc; |
dbd88788 | 2168 | int ret; |
5f81158f RV |
2169 | |
2170 | desc = d40_desc_get(chan); | |
2171 | if (!desc) | |
2172 | return NULL; | |
2173 | ||
86145910 | 2174 | cfg = &chan->dma_cfg; |
5f81158f RV |
2175 | desc->lli_len = d40_sg_2_dmalen(sg, sg_len, cfg->src_info.data_width, |
2176 | cfg->dst_info.data_width); | |
2177 | if (desc->lli_len < 0) { | |
2178 | chan_err(chan, "Unaligned size\n"); | |
254e1254 | 2179 | goto free_desc; |
dbd88788 | 2180 | } |
5f81158f | 2181 | |
dbd88788 RV |
2182 | ret = d40_pool_lli_alloc(chan, desc, desc->lli_len); |
2183 | if (ret < 0) { | |
2184 | chan_err(chan, "Could not allocate lli\n"); | |
254e1254 | 2185 | goto free_desc; |
5f81158f RV |
2186 | } |
2187 | ||
2188 | desc->lli_current = 0; | |
2189 | desc->txd.flags = dma_flags; | |
2190 | desc->txd.tx_submit = d40_tx_submit; | |
2191 | ||
2192 | dma_async_tx_descriptor_init(&desc->txd, &chan->chan); | |
2193 | ||
2194 | return desc; | |
254e1254 | 2195 | free_desc: |
dbd88788 RV |
2196 | d40_desc_free(chan, desc); |
2197 | return NULL; | |
5f81158f RV |
2198 | } |
2199 | ||
cade1d30 RV |
2200 | static struct dma_async_tx_descriptor * |
2201 | d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src, | |
2202 | struct scatterlist *sg_dst, unsigned int sg_len, | |
db8196df | 2203 | enum dma_transfer_direction direction, unsigned long dma_flags) |
cade1d30 RV |
2204 | { |
2205 | struct d40_chan *chan = container_of(dchan, struct d40_chan, chan); | |
444fa147 ME |
2206 | dma_addr_t src_dev_addr; |
2207 | dma_addr_t dst_dev_addr; | |
cade1d30 | 2208 | struct d40_desc *desc; |
2a614340 | 2209 | unsigned long flags; |
cade1d30 | 2210 | int ret; |
8d318a50 | 2211 | |
cade1d30 RV |
2212 | if (!chan->phy_chan) { |
2213 | chan_err(chan, "Cannot prepare unallocated channel\n"); | |
2214 | return NULL; | |
0d0f6b8b JA |
2215 | } |
2216 | ||
cade1d30 | 2217 | spin_lock_irqsave(&chan->lock, flags); |
8d318a50 | 2218 | |
cade1d30 RV |
2219 | desc = d40_prep_desc(chan, sg_src, sg_len, dma_flags); |
2220 | if (desc == NULL) | |
78c6e1a5 | 2221 | goto unlock; |
8d318a50 | 2222 | |
0c842b55 RV |
2223 | if (sg_next(&sg_src[sg_len - 1]) == sg_src) |
2224 | desc->cyclic = true; | |
2225 | ||
444fa147 ME |
2226 | src_dev_addr = 0; |
2227 | dst_dev_addr = 0; | |
ef9c89b3 LJ |
2228 | if (direction == DMA_DEV_TO_MEM) |
2229 | src_dev_addr = chan->runtime_addr; | |
2230 | else if (direction == DMA_MEM_TO_DEV) | |
2231 | dst_dev_addr = chan->runtime_addr; | |
cade1d30 RV |
2232 | |
2233 | if (chan_is_logical(chan)) | |
2234 | ret = d40_prep_sg_log(chan, desc, sg_src, sg_dst, | |
822c5676 | 2235 | sg_len, src_dev_addr, dst_dev_addr); |
cade1d30 RV |
2236 | else |
2237 | ret = d40_prep_sg_phy(chan, desc, sg_src, sg_dst, | |
822c5676 | 2238 | sg_len, src_dev_addr, dst_dev_addr); |
cade1d30 RV |
2239 | |
2240 | if (ret) { | |
2241 | chan_err(chan, "Failed to prepare %s sg job: %d\n", | |
2242 | chan_is_logical(chan) ? "log" : "phy", ret); | |
78c6e1a5 | 2243 | goto free_desc; |
8d318a50 LW |
2244 | } |
2245 | ||
82babbb3 PF |
2246 | /* |
2247 | * add descriptor to the prepare queue in order to be able | |
2248 | * to free them later in terminate_all | |
2249 | */ | |
2250 | list_add_tail(&desc->node, &chan->prepare_queue); | |
2251 | ||
cade1d30 RV |
2252 | spin_unlock_irqrestore(&chan->lock, flags); |
2253 | ||
2254 | return &desc->txd; | |
78c6e1a5 ME |
2255 | free_desc: |
2256 | d40_desc_free(chan, desc); | |
2257 | unlock: | |
cade1d30 | 2258 | spin_unlock_irqrestore(&chan->lock, flags); |
8d318a50 LW |
2259 | return NULL; |
2260 | } | |
8d318a50 LW |
2261 | |
2262 | bool stedma40_filter(struct dma_chan *chan, void *data) | |
2263 | { | |
2264 | struct stedma40_chan_cfg *info = data; | |
2265 | struct d40_chan *d40c = | |
2266 | container_of(chan, struct d40_chan, chan); | |
2267 | int err; | |
2268 | ||
2269 | if (data) { | |
2270 | err = d40_validate_conf(d40c, info); | |
2271 | if (!err) | |
2272 | d40c->dma_cfg = *info; | |
2273 | } else | |
2274 | err = d40_config_memcpy(d40c); | |
2275 | ||
ce2ca125 RV |
2276 | if (!err) |
2277 | d40c->configured = true; | |
2278 | ||
8d318a50 LW |
2279 | return err == 0; |
2280 | } | |
2281 | EXPORT_SYMBOL(stedma40_filter); | |
2282 | ||
ac2c0a38 RV |
2283 | static void __d40_set_prio_rt(struct d40_chan *d40c, int dev_type, bool src) |
2284 | { | |
2285 | bool realtime = d40c->dma_cfg.realtime; | |
2286 | bool highprio = d40c->dma_cfg.high_priority; | |
3cb645dc | 2287 | u32 rtreg; |
ac2c0a38 RV |
2288 | u32 event = D40_TYPE_TO_EVENT(dev_type); |
2289 | u32 group = D40_TYPE_TO_GROUP(dev_type); | |
8a3b6e14 | 2290 | u32 bit = BIT(event); |
ccc3d697 | 2291 | u32 prioreg; |
3cb645dc | 2292 | struct d40_gen_dmac *dmac = &d40c->base->gen_dmac; |
ccc3d697 | 2293 | |
3cb645dc | 2294 | rtreg = realtime ? dmac->realtime_en : dmac->realtime_clear; |
ccc3d697 RV |
2295 | /* |
2296 | * Due to a hardware bug, in some cases a logical channel triggered by | |
2297 | * a high priority destination event line can generate extra packet | |
2298 | * transactions. | |
2299 | * | |
2300 | * The workaround is to not set the high priority level for the | |
2301 | * destination event lines that trigger logical channels. | |
2302 | */ | |
2303 | if (!src && chan_is_logical(d40c)) | |
2304 | highprio = false; | |
2305 | ||
3cb645dc | 2306 | prioreg = highprio ? dmac->high_prio_en : dmac->high_prio_clear; |
ac2c0a38 RV |
2307 | |
2308 | /* Destination event lines are stored in the upper halfword */ | |
2309 | if (!src) | |
2310 | bit <<= 16; | |
2311 | ||
2312 | writel(bit, d40c->base->virtbase + prioreg + group * 4); | |
2313 | writel(bit, d40c->base->virtbase + rtreg + group * 4); | |
2314 | } | |
2315 | ||
2316 | static void d40_set_prio_realtime(struct d40_chan *d40c) | |
2317 | { | |
2318 | if (d40c->base->rev < 3) | |
2319 | return; | |
2320 | ||
2c2b62d5 LJ |
2321 | if ((d40c->dma_cfg.dir == DMA_DEV_TO_MEM) || |
2322 | (d40c->dma_cfg.dir == DMA_DEV_TO_DEV)) | |
26955c07 | 2323 | __d40_set_prio_rt(d40c, d40c->dma_cfg.dev_type, true); |
ac2c0a38 | 2324 | |
2c2b62d5 LJ |
2325 | if ((d40c->dma_cfg.dir == DMA_MEM_TO_DEV) || |
2326 | (d40c->dma_cfg.dir == DMA_DEV_TO_DEV)) | |
26955c07 | 2327 | __d40_set_prio_rt(d40c, d40c->dma_cfg.dev_type, false); |
ac2c0a38 RV |
2328 | } |
2329 | ||
fa332de5 LJ |
2330 | #define D40_DT_FLAGS_MODE(flags) ((flags >> 0) & 0x1) |
2331 | #define D40_DT_FLAGS_DIR(flags) ((flags >> 1) & 0x1) | |
2332 | #define D40_DT_FLAGS_BIG_ENDIAN(flags) ((flags >> 2) & 0x1) | |
2333 | #define D40_DT_FLAGS_FIXED_CHAN(flags) ((flags >> 3) & 0x1) | |
bddd5a2b | 2334 | #define D40_DT_FLAGS_HIGH_PRIO(flags) ((flags >> 4) & 0x1) |
fa332de5 LJ |
2335 | |
2336 | static struct dma_chan *d40_xlate(struct of_phandle_args *dma_spec, | |
2337 | struct of_dma *ofdma) | |
2338 | { | |
2339 | struct stedma40_chan_cfg cfg; | |
2340 | dma_cap_mask_t cap; | |
2341 | u32 flags; | |
2342 | ||
2343 | memset(&cfg, 0, sizeof(struct stedma40_chan_cfg)); | |
2344 | ||
2345 | dma_cap_zero(cap); | |
2346 | dma_cap_set(DMA_SLAVE, cap); | |
2347 | ||
2348 | cfg.dev_type = dma_spec->args[0]; | |
2349 | flags = dma_spec->args[2]; | |
2350 | ||
2351 | switch (D40_DT_FLAGS_MODE(flags)) { | |
2352 | case 0: cfg.mode = STEDMA40_MODE_LOGICAL; break; | |
2353 | case 1: cfg.mode = STEDMA40_MODE_PHYSICAL; break; | |
2354 | } | |
2355 | ||
2356 | switch (D40_DT_FLAGS_DIR(flags)) { | |
2357 | case 0: | |
2c2b62d5 | 2358 | cfg.dir = DMA_MEM_TO_DEV; |
fa332de5 LJ |
2359 | cfg.dst_info.big_endian = D40_DT_FLAGS_BIG_ENDIAN(flags); |
2360 | break; | |
2361 | case 1: | |
2c2b62d5 | 2362 | cfg.dir = DMA_DEV_TO_MEM; |
fa332de5 LJ |
2363 | cfg.src_info.big_endian = D40_DT_FLAGS_BIG_ENDIAN(flags); |
2364 | break; | |
2365 | } | |
2366 | ||
2367 | if (D40_DT_FLAGS_FIXED_CHAN(flags)) { | |
2368 | cfg.phy_channel = dma_spec->args[1]; | |
2369 | cfg.use_fixed_channel = true; | |
2370 | } | |
2371 | ||
bddd5a2b LJ |
2372 | if (D40_DT_FLAGS_HIGH_PRIO(flags)) |
2373 | cfg.high_priority = true; | |
2374 | ||
fa332de5 LJ |
2375 | return dma_request_channel(cap, stedma40_filter, &cfg); |
2376 | } | |
2377 | ||
8d318a50 LW |
2378 | /* DMA ENGINE functions */ |
2379 | static int d40_alloc_chan_resources(struct dma_chan *chan) | |
2380 | { | |
2381 | int err; | |
2382 | unsigned long flags; | |
2383 | struct d40_chan *d40c = | |
2384 | container_of(chan, struct d40_chan, chan); | |
ef1872ec | 2385 | bool is_free_phy; |
8d318a50 LW |
2386 | spin_lock_irqsave(&d40c->lock, flags); |
2387 | ||
d3ee98cd | 2388 | dma_cookie_init(chan); |
8d318a50 | 2389 | |
ce2ca125 RV |
2390 | /* If no dma configuration is set use default configuration (memcpy) */ |
2391 | if (!d40c->configured) { | |
8d318a50 | 2392 | err = d40_config_memcpy(d40c); |
ff0b12ba | 2393 | if (err) { |
6db5a8ba | 2394 | chan_err(d40c, "Failed to configure memcpy channel\n"); |
8452b859 | 2395 | goto mark_last_busy; |
ff0b12ba | 2396 | } |
8d318a50 LW |
2397 | } |
2398 | ||
5cd326fd | 2399 | err = d40_allocate_channel(d40c, &is_free_phy); |
8d318a50 | 2400 | if (err) { |
6db5a8ba | 2401 | chan_err(d40c, "Failed to allocate channel\n"); |
7fb3e75e | 2402 | d40c->configured = false; |
8452b859 | 2403 | goto mark_last_busy; |
8d318a50 LW |
2404 | } |
2405 | ||
7fb3e75e | 2406 | pm_runtime_get_sync(d40c->base->dev); |
ef1872ec | 2407 | |
ac2c0a38 RV |
2408 | d40_set_prio_realtime(d40c); |
2409 | ||
724a8577 | 2410 | if (chan_is_logical(d40c)) { |
2c2b62d5 | 2411 | if (d40c->dma_cfg.dir == DMA_DEV_TO_MEM) |
ef1872ec | 2412 | d40c->lcpa = d40c->base->lcpa_base + |
26955c07 | 2413 | d40c->dma_cfg.dev_type * D40_LCPA_CHAN_SIZE; |
ef1872ec LW |
2414 | else |
2415 | d40c->lcpa = d40c->base->lcpa_base + | |
26955c07 | 2416 | d40c->dma_cfg.dev_type * |
f26e03ad | 2417 | D40_LCPA_CHAN_SIZE + D40_LCPA_CHAN_DST_DELTA; |
9778256b LJ |
2418 | |
2419 | /* Unmask the Global Interrupt Mask. */ | |
2420 | d40c->src_def_cfg |= BIT(D40_SREG_CFG_LOG_GIM_POS); | |
2421 | d40c->dst_def_cfg |= BIT(D40_SREG_CFG_LOG_GIM_POS); | |
ef1872ec LW |
2422 | } |
2423 | ||
5cd326fd N |
2424 | dev_dbg(chan2dev(d40c), "allocated %s channel (phy %d%s)\n", |
2425 | chan_is_logical(d40c) ? "logical" : "physical", | |
2426 | d40c->phy_chan->num, | |
2427 | d40c->dma_cfg.use_fixed_channel ? ", fixed" : ""); | |
2428 | ||
2429 | ||
ef1872ec LW |
2430 | /* |
2431 | * Only write channel configuration to the DMA if the physical | |
2432 | * resource is free. In case of multiple logical channels | |
2433 | * on the same physical resource, only the first write is necessary. | |
2434 | */ | |
b55912c6 JA |
2435 | if (is_free_phy) |
2436 | d40_config_write(d40c); | |
8452b859 | 2437 | mark_last_busy: |
7fb3e75e N |
2438 | pm_runtime_mark_last_busy(d40c->base->dev); |
2439 | pm_runtime_put_autosuspend(d40c->base->dev); | |
8d318a50 | 2440 | spin_unlock_irqrestore(&d40c->lock, flags); |
ff0b12ba | 2441 | return err; |
8d318a50 LW |
2442 | } |
2443 | ||
2444 | static void d40_free_chan_resources(struct dma_chan *chan) | |
2445 | { | |
2446 | struct d40_chan *d40c = | |
2447 | container_of(chan, struct d40_chan, chan); | |
2448 | int err; | |
2449 | unsigned long flags; | |
2450 | ||
0d0f6b8b | 2451 | if (d40c->phy_chan == NULL) { |
6db5a8ba | 2452 | chan_err(d40c, "Cannot free unallocated channel\n"); |
0d0f6b8b JA |
2453 | return; |
2454 | } | |
2455 | ||
8d318a50 LW |
2456 | spin_lock_irqsave(&d40c->lock, flags); |
2457 | ||
2458 | err = d40_free_dma(d40c); | |
2459 | ||
2460 | if (err) | |
6db5a8ba | 2461 | chan_err(d40c, "Failed to free channel\n"); |
8d318a50 LW |
2462 | spin_unlock_irqrestore(&d40c->lock, flags); |
2463 | } | |
2464 | ||
2465 | static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan, | |
2466 | dma_addr_t dst, | |
2467 | dma_addr_t src, | |
2468 | size_t size, | |
2a614340 | 2469 | unsigned long dma_flags) |
8d318a50 | 2470 | { |
95944c6e RV |
2471 | struct scatterlist dst_sg; |
2472 | struct scatterlist src_sg; | |
8d318a50 | 2473 | |
95944c6e RV |
2474 | sg_init_table(&dst_sg, 1); |
2475 | sg_init_table(&src_sg, 1); | |
8d318a50 | 2476 | |
95944c6e RV |
2477 | sg_dma_address(&dst_sg) = dst; |
2478 | sg_dma_address(&src_sg) = src; | |
8d318a50 | 2479 | |
95944c6e RV |
2480 | sg_dma_len(&dst_sg) = size; |
2481 | sg_dma_len(&src_sg) = size; | |
8d318a50 | 2482 | |
de6b641e SA |
2483 | return d40_prep_sg(chan, &src_sg, &dst_sg, 1, |
2484 | DMA_MEM_TO_MEM, dma_flags); | |
8d318a50 LW |
2485 | } |
2486 | ||
f26e03ad FB |
2487 | static struct dma_async_tx_descriptor * |
2488 | d40_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, | |
2489 | unsigned int sg_len, enum dma_transfer_direction direction, | |
2490 | unsigned long dma_flags, void *context) | |
8d318a50 | 2491 | { |
a725dcc0 | 2492 | if (!is_slave_direction(direction)) |
00ac0341 RV |
2493 | return NULL; |
2494 | ||
cade1d30 | 2495 | return d40_prep_sg(chan, sgl, sgl, sg_len, direction, dma_flags); |
8d318a50 LW |
2496 | } |
2497 | ||
0c842b55 RV |
2498 | static struct dma_async_tx_descriptor * |
2499 | dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, | |
2500 | size_t buf_len, size_t period_len, | |
31c1e5a1 | 2501 | enum dma_transfer_direction direction, unsigned long flags) |
0c842b55 RV |
2502 | { |
2503 | unsigned int periods = buf_len / period_len; | |
2504 | struct dma_async_tx_descriptor *txd; | |
2505 | struct scatterlist *sg; | |
2506 | int i; | |
2507 | ||
79ca7ec3 | 2508 | sg = kcalloc(periods + 1, sizeof(struct scatterlist), GFP_NOWAIT); |
2ec7e2e7 SK |
2509 | if (!sg) |
2510 | return NULL; | |
2511 | ||
0c842b55 RV |
2512 | for (i = 0; i < periods; i++) { |
2513 | sg_dma_address(&sg[i]) = dma_addr; | |
2514 | sg_dma_len(&sg[i]) = period_len; | |
2515 | dma_addr += period_len; | |
2516 | } | |
2517 | ||
838b56ad | 2518 | sg_chain(sg, periods + 1, sg); |
0c842b55 RV |
2519 | |
2520 | txd = d40_prep_sg(chan, sg, sg, periods, direction, | |
2521 | DMA_PREP_INTERRUPT); | |
2522 | ||
2523 | kfree(sg); | |
2524 | ||
2525 | return txd; | |
2526 | } | |
2527 | ||
8d318a50 LW |
2528 | static enum dma_status d40_tx_status(struct dma_chan *chan, |
2529 | dma_cookie_t cookie, | |
2530 | struct dma_tx_state *txstate) | |
2531 | { | |
2532 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
96a2af41 | 2533 | enum dma_status ret; |
8d318a50 | 2534 | |
0d0f6b8b | 2535 | if (d40c->phy_chan == NULL) { |
6db5a8ba | 2536 | chan_err(d40c, "Cannot read status of unallocated channel\n"); |
0d0f6b8b JA |
2537 | return -EINVAL; |
2538 | } | |
2539 | ||
96a2af41 | 2540 | ret = dma_cookie_status(chan, cookie, txstate); |
a90e56e5 | 2541 | if (ret != DMA_COMPLETE && txstate) |
96a2af41 | 2542 | dma_set_residue(txstate, stedma40_residue(chan)); |
8d318a50 | 2543 | |
a5ebca47 JA |
2544 | if (d40_is_paused(d40c)) |
2545 | ret = DMA_PAUSED; | |
8d318a50 LW |
2546 | |
2547 | return ret; | |
2548 | } | |
2549 | ||
2550 | static void d40_issue_pending(struct dma_chan *chan) | |
2551 | { | |
2552 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2553 | unsigned long flags; | |
2554 | ||
0d0f6b8b | 2555 | if (d40c->phy_chan == NULL) { |
6db5a8ba | 2556 | chan_err(d40c, "Channel is not allocated!\n"); |
0d0f6b8b JA |
2557 | return; |
2558 | } | |
2559 | ||
8d318a50 LW |
2560 | spin_lock_irqsave(&d40c->lock, flags); |
2561 | ||
a8f3067b PF |
2562 | list_splice_tail_init(&d40c->pending_queue, &d40c->queue); |
2563 | ||
2564 | /* Busy means that queued jobs are already being processed */ | |
8d318a50 LW |
2565 | if (!d40c->busy) |
2566 | (void) d40_queue_start(d40c); | |
2567 | ||
2568 | spin_unlock_irqrestore(&d40c->lock, flags); | |
2569 | } | |
2570 | ||
35e639d1 | 2571 | static int d40_terminate_all(struct dma_chan *chan) |
1bdae6f4 N |
2572 | { |
2573 | unsigned long flags; | |
2574 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2575 | int ret; | |
2576 | ||
6f5bad03 MR |
2577 | if (d40c->phy_chan == NULL) { |
2578 | chan_err(d40c, "Channel is not allocated!\n"); | |
2579 | return -EINVAL; | |
2580 | } | |
2581 | ||
1bdae6f4 N |
2582 | spin_lock_irqsave(&d40c->lock, flags); |
2583 | ||
2584 | pm_runtime_get_sync(d40c->base->dev); | |
2585 | ret = d40_channel_execute_command(d40c, D40_DMA_STOP); | |
2586 | if (ret) | |
2587 | chan_err(d40c, "Failed to stop channel\n"); | |
2588 | ||
2589 | d40_term_all(d40c); | |
2590 | pm_runtime_mark_last_busy(d40c->base->dev); | |
2591 | pm_runtime_put_autosuspend(d40c->base->dev); | |
2592 | if (d40c->busy) { | |
2593 | pm_runtime_mark_last_busy(d40c->base->dev); | |
2594 | pm_runtime_put_autosuspend(d40c->base->dev); | |
2595 | } | |
2596 | d40c->busy = false; | |
2597 | ||
2598 | spin_unlock_irqrestore(&d40c->lock, flags); | |
35e639d1 | 2599 | return 0; |
1bdae6f4 N |
2600 | } |
2601 | ||
98ca5289 RV |
2602 | static int |
2603 | dma40_config_to_halfchannel(struct d40_chan *d40c, | |
2604 | struct stedma40_half_channel_info *info, | |
98ca5289 RV |
2605 | u32 maxburst) |
2606 | { | |
98ca5289 RV |
2607 | int psize; |
2608 | ||
98ca5289 RV |
2609 | if (chan_is_logical(d40c)) { |
2610 | if (maxburst >= 16) | |
2611 | psize = STEDMA40_PSIZE_LOG_16; | |
2612 | else if (maxburst >= 8) | |
2613 | psize = STEDMA40_PSIZE_LOG_8; | |
2614 | else if (maxburst >= 4) | |
2615 | psize = STEDMA40_PSIZE_LOG_4; | |
2616 | else | |
2617 | psize = STEDMA40_PSIZE_LOG_1; | |
2618 | } else { | |
2619 | if (maxburst >= 16) | |
2620 | psize = STEDMA40_PSIZE_PHY_16; | |
2621 | else if (maxburst >= 8) | |
2622 | psize = STEDMA40_PSIZE_PHY_8; | |
2623 | else if (maxburst >= 4) | |
2624 | psize = STEDMA40_PSIZE_PHY_4; | |
2625 | else | |
2626 | psize = STEDMA40_PSIZE_PHY_1; | |
2627 | } | |
2628 | ||
98ca5289 RV |
2629 | info->psize = psize; |
2630 | info->flow_ctrl = STEDMA40_NO_FLOW_CTRL; | |
2631 | ||
2632 | return 0; | |
2633 | } | |
2634 | ||
95e1400f | 2635 | /* Runtime reconfiguration extension */ |
98ca5289 RV |
2636 | static int d40_set_runtime_config(struct dma_chan *chan, |
2637 | struct dma_slave_config *config) | |
95e1400f LW |
2638 | { |
2639 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2640 | struct stedma40_chan_cfg *cfg = &d40c->dma_cfg; | |
98ca5289 | 2641 | enum dma_slave_buswidth src_addr_width, dst_addr_width; |
95e1400f | 2642 | dma_addr_t config_addr; |
98ca5289 RV |
2643 | u32 src_maxburst, dst_maxburst; |
2644 | int ret; | |
2645 | ||
6f5bad03 MR |
2646 | if (d40c->phy_chan == NULL) { |
2647 | chan_err(d40c, "Channel is not allocated!\n"); | |
2648 | return -EINVAL; | |
2649 | } | |
2650 | ||
98ca5289 RV |
2651 | src_addr_width = config->src_addr_width; |
2652 | src_maxburst = config->src_maxburst; | |
2653 | dst_addr_width = config->dst_addr_width; | |
2654 | dst_maxburst = config->dst_maxburst; | |
95e1400f | 2655 | |
db8196df | 2656 | if (config->direction == DMA_DEV_TO_MEM) { |
95e1400f | 2657 | config_addr = config->src_addr; |
ef9c89b3 | 2658 | |
2c2b62d5 | 2659 | if (cfg->dir != DMA_DEV_TO_MEM) |
95e1400f LW |
2660 | dev_dbg(d40c->base->dev, |
2661 | "channel was not configured for peripheral " | |
2662 | "to memory transfer (%d) overriding\n", | |
2663 | cfg->dir); | |
2c2b62d5 | 2664 | cfg->dir = DMA_DEV_TO_MEM; |
95e1400f | 2665 | |
98ca5289 RV |
2666 | /* Configure the memory side */ |
2667 | if (dst_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED) | |
2668 | dst_addr_width = src_addr_width; | |
2669 | if (dst_maxburst == 0) | |
2670 | dst_maxburst = src_maxburst; | |
95e1400f | 2671 | |
db8196df | 2672 | } else if (config->direction == DMA_MEM_TO_DEV) { |
95e1400f | 2673 | config_addr = config->dst_addr; |
ef9c89b3 | 2674 | |
2c2b62d5 | 2675 | if (cfg->dir != DMA_MEM_TO_DEV) |
95e1400f LW |
2676 | dev_dbg(d40c->base->dev, |
2677 | "channel was not configured for memory " | |
2678 | "to peripheral transfer (%d) overriding\n", | |
2679 | cfg->dir); | |
2c2b62d5 | 2680 | cfg->dir = DMA_MEM_TO_DEV; |
95e1400f | 2681 | |
98ca5289 RV |
2682 | /* Configure the memory side */ |
2683 | if (src_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED) | |
2684 | src_addr_width = dst_addr_width; | |
2685 | if (src_maxburst == 0) | |
2686 | src_maxburst = dst_maxburst; | |
95e1400f LW |
2687 | } else { |
2688 | dev_err(d40c->base->dev, | |
2689 | "unrecognized channel direction %d\n", | |
2690 | config->direction); | |
98ca5289 | 2691 | return -EINVAL; |
95e1400f LW |
2692 | } |
2693 | ||
ef9c89b3 LJ |
2694 | if (config_addr <= 0) { |
2695 | dev_err(d40c->base->dev, "no address supplied\n"); | |
2696 | return -EINVAL; | |
2697 | } | |
2698 | ||
98ca5289 | 2699 | if (src_maxburst * src_addr_width != dst_maxburst * dst_addr_width) { |
95e1400f | 2700 | dev_err(d40c->base->dev, |
98ca5289 RV |
2701 | "src/dst width/maxburst mismatch: %d*%d != %d*%d\n", |
2702 | src_maxburst, | |
2703 | src_addr_width, | |
2704 | dst_maxburst, | |
2705 | dst_addr_width); | |
2706 | return -EINVAL; | |
95e1400f LW |
2707 | } |
2708 | ||
92bb6cdb PF |
2709 | if (src_maxburst > 16) { |
2710 | src_maxburst = 16; | |
2711 | dst_maxburst = src_maxburst * src_addr_width / dst_addr_width; | |
2712 | } else if (dst_maxburst > 16) { | |
2713 | dst_maxburst = 16; | |
2714 | src_maxburst = dst_maxburst * dst_addr_width / src_addr_width; | |
2715 | } | |
2716 | ||
43f2e1a3 LJ |
2717 | /* Only valid widths are; 1, 2, 4 and 8. */ |
2718 | if (src_addr_width <= DMA_SLAVE_BUSWIDTH_UNDEFINED || | |
2719 | src_addr_width > DMA_SLAVE_BUSWIDTH_8_BYTES || | |
2720 | dst_addr_width <= DMA_SLAVE_BUSWIDTH_UNDEFINED || | |
2721 | dst_addr_width > DMA_SLAVE_BUSWIDTH_8_BYTES || | |
c95905a6 GL |
2722 | !is_power_of_2(src_addr_width) || |
2723 | !is_power_of_2(dst_addr_width)) | |
43f2e1a3 LJ |
2724 | return -EINVAL; |
2725 | ||
2726 | cfg->src_info.data_width = src_addr_width; | |
2727 | cfg->dst_info.data_width = dst_addr_width; | |
2728 | ||
98ca5289 | 2729 | ret = dma40_config_to_halfchannel(d40c, &cfg->src_info, |
98ca5289 RV |
2730 | src_maxburst); |
2731 | if (ret) | |
2732 | return ret; | |
95e1400f | 2733 | |
98ca5289 | 2734 | ret = dma40_config_to_halfchannel(d40c, &cfg->dst_info, |
98ca5289 RV |
2735 | dst_maxburst); |
2736 | if (ret) | |
2737 | return ret; | |
95e1400f | 2738 | |
a59670a4 | 2739 | /* Fill in register values */ |
724a8577 | 2740 | if (chan_is_logical(d40c)) |
a59670a4 PF |
2741 | d40_log_cfg(cfg, &d40c->log_def.lcsp1, &d40c->log_def.lcsp3); |
2742 | else | |
57e65ad7 | 2743 | d40_phy_cfg(cfg, &d40c->src_def_cfg, &d40c->dst_def_cfg); |
a59670a4 | 2744 | |
95e1400f LW |
2745 | /* These settings will take precedence later */ |
2746 | d40c->runtime_addr = config_addr; | |
2747 | d40c->runtime_direction = config->direction; | |
2748 | dev_dbg(d40c->base->dev, | |
98ca5289 RV |
2749 | "configured channel %s for %s, data width %d/%d, " |
2750 | "maxburst %d/%d elements, LE, no flow control\n", | |
95e1400f | 2751 | dma_chan_name(chan), |
db8196df | 2752 | (config->direction == DMA_DEV_TO_MEM) ? "RX" : "TX", |
98ca5289 RV |
2753 | src_addr_width, dst_addr_width, |
2754 | src_maxburst, dst_maxburst); | |
2755 | ||
2756 | return 0; | |
95e1400f LW |
2757 | } |
2758 | ||
8d318a50 LW |
2759 | /* Initialization functions */ |
2760 | ||
2761 | static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma, | |
2762 | struct d40_chan *chans, int offset, | |
2763 | int num_chans) | |
2764 | { | |
2765 | int i = 0; | |
2766 | struct d40_chan *d40c; | |
2767 | ||
2768 | INIT_LIST_HEAD(&dma->channels); | |
2769 | ||
2770 | for (i = offset; i < offset + num_chans; i++) { | |
2771 | d40c = &chans[i]; | |
2772 | d40c->base = base; | |
2773 | d40c->chan.device = dma; | |
2774 | ||
8d318a50 LW |
2775 | spin_lock_init(&d40c->lock); |
2776 | ||
2777 | d40c->log_num = D40_PHY_CHAN; | |
2778 | ||
4226dd86 | 2779 | INIT_LIST_HEAD(&d40c->done); |
8d318a50 LW |
2780 | INIT_LIST_HEAD(&d40c->active); |
2781 | INIT_LIST_HEAD(&d40c->queue); | |
a8f3067b | 2782 | INIT_LIST_HEAD(&d40c->pending_queue); |
8d318a50 | 2783 | INIT_LIST_HEAD(&d40c->client); |
82babbb3 | 2784 | INIT_LIST_HEAD(&d40c->prepare_queue); |
8d318a50 | 2785 | |
8d318a50 LW |
2786 | tasklet_init(&d40c->tasklet, dma_tasklet, |
2787 | (unsigned long) d40c); | |
2788 | ||
2789 | list_add_tail(&d40c->chan.device_node, | |
2790 | &dma->channels); | |
2791 | } | |
2792 | } | |
2793 | ||
7ad74a7c RV |
2794 | static void d40_ops_init(struct d40_base *base, struct dma_device *dev) |
2795 | { | |
49873e99 | 2796 | if (dma_has_cap(DMA_SLAVE, dev->cap_mask)) { |
7ad74a7c | 2797 | dev->device_prep_slave_sg = d40_prep_slave_sg; |
49873e99 LW |
2798 | dev->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); |
2799 | } | |
7ad74a7c RV |
2800 | |
2801 | if (dma_has_cap(DMA_MEMCPY, dev->cap_mask)) { | |
2802 | dev->device_prep_dma_memcpy = d40_prep_memcpy; | |
49873e99 | 2803 | dev->directions = BIT(DMA_MEM_TO_MEM); |
7ad74a7c RV |
2804 | /* |
2805 | * This controller can only access address at even | |
2806 | * 32bit boundaries, i.e. 2^2 | |
2807 | */ | |
77a68e56 | 2808 | dev->copy_align = DMAENGINE_ALIGN_4_BYTES; |
7ad74a7c RV |
2809 | } |
2810 | ||
0c842b55 RV |
2811 | if (dma_has_cap(DMA_CYCLIC, dev->cap_mask)) |
2812 | dev->device_prep_dma_cyclic = dma40_prep_dma_cyclic; | |
2813 | ||
7ad74a7c RV |
2814 | dev->device_alloc_chan_resources = d40_alloc_chan_resources; |
2815 | dev->device_free_chan_resources = d40_free_chan_resources; | |
2816 | dev->device_issue_pending = d40_issue_pending; | |
2817 | dev->device_tx_status = d40_tx_status; | |
6f5bad03 MR |
2818 | dev->device_config = d40_set_runtime_config; |
2819 | dev->device_pause = d40_pause; | |
2820 | dev->device_resume = d40_resume; | |
2821 | dev->device_terminate_all = d40_terminate_all; | |
15c60668 | 2822 | dev->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; |
7ad74a7c RV |
2823 | dev->dev = base->dev; |
2824 | } | |
2825 | ||
8d318a50 LW |
2826 | static int __init d40_dmaengine_init(struct d40_base *base, |
2827 | int num_reserved_chans) | |
2828 | { | |
2829 | int err ; | |
2830 | ||
2831 | d40_chan_init(base, &base->dma_slave, base->log_chans, | |
2832 | 0, base->num_log_chans); | |
2833 | ||
2834 | dma_cap_zero(base->dma_slave.cap_mask); | |
2835 | dma_cap_set(DMA_SLAVE, base->dma_slave.cap_mask); | |
0c842b55 | 2836 | dma_cap_set(DMA_CYCLIC, base->dma_slave.cap_mask); |
8d318a50 | 2837 | |
7ad74a7c | 2838 | d40_ops_init(base, &base->dma_slave); |
8d318a50 LW |
2839 | |
2840 | err = dma_async_device_register(&base->dma_slave); | |
2841 | ||
2842 | if (err) { | |
6db5a8ba | 2843 | d40_err(base->dev, "Failed to register slave channels\n"); |
c9909935 | 2844 | goto exit; |
8d318a50 LW |
2845 | } |
2846 | ||
2847 | d40_chan_init(base, &base->dma_memcpy, base->log_chans, | |
a7dacb68 | 2848 | base->num_log_chans, base->num_memcpy_chans); |
8d318a50 LW |
2849 | |
2850 | dma_cap_zero(base->dma_memcpy.cap_mask); | |
2851 | dma_cap_set(DMA_MEMCPY, base->dma_memcpy.cap_mask); | |
7ad74a7c RV |
2852 | |
2853 | d40_ops_init(base, &base->dma_memcpy); | |
8d318a50 LW |
2854 | |
2855 | err = dma_async_device_register(&base->dma_memcpy); | |
2856 | ||
2857 | if (err) { | |
6db5a8ba | 2858 | d40_err(base->dev, |
52984aab | 2859 | "Failed to register memcpy only channels\n"); |
c9909935 | 2860 | goto unregister_slave; |
8d318a50 LW |
2861 | } |
2862 | ||
2863 | d40_chan_init(base, &base->dma_both, base->phy_chans, | |
2864 | 0, num_reserved_chans); | |
2865 | ||
2866 | dma_cap_zero(base->dma_both.cap_mask); | |
2867 | dma_cap_set(DMA_SLAVE, base->dma_both.cap_mask); | |
2868 | dma_cap_set(DMA_MEMCPY, base->dma_both.cap_mask); | |
0c842b55 | 2869 | dma_cap_set(DMA_CYCLIC, base->dma_slave.cap_mask); |
7ad74a7c RV |
2870 | |
2871 | d40_ops_init(base, &base->dma_both); | |
8d318a50 LW |
2872 | err = dma_async_device_register(&base->dma_both); |
2873 | ||
2874 | if (err) { | |
6db5a8ba RV |
2875 | d40_err(base->dev, |
2876 | "Failed to register logical and physical capable channels\n"); | |
c9909935 | 2877 | goto unregister_memcpy; |
8d318a50 LW |
2878 | } |
2879 | return 0; | |
c9909935 | 2880 | unregister_memcpy: |
8d318a50 | 2881 | dma_async_device_unregister(&base->dma_memcpy); |
c9909935 | 2882 | unregister_slave: |
8d318a50 | 2883 | dma_async_device_unregister(&base->dma_slave); |
c9909935 | 2884 | exit: |
8d318a50 LW |
2885 | return err; |
2886 | } | |
2887 | ||
7fb3e75e | 2888 | /* Suspend resume functionality */ |
123e4ca1 UH |
2889 | #ifdef CONFIG_PM_SLEEP |
2890 | static int dma40_suspend(struct device *dev) | |
7fb3e75e | 2891 | { |
be34c218 | 2892 | struct d40_base *base = dev_get_drvdata(dev); |
c906a3ec UH |
2893 | int ret; |
2894 | ||
2895 | ret = pm_runtime_force_suspend(dev); | |
2896 | if (ret) | |
2897 | return ret; | |
7fb3e75e | 2898 | |
28c7a19d N |
2899 | if (base->lcpa_regulator) |
2900 | ret = regulator_disable(base->lcpa_regulator); | |
2901 | return ret; | |
7fb3e75e N |
2902 | } |
2903 | ||
123e4ca1 UH |
2904 | static int dma40_resume(struct device *dev) |
2905 | { | |
be34c218 | 2906 | struct d40_base *base = dev_get_drvdata(dev); |
123e4ca1 UH |
2907 | int ret = 0; |
2908 | ||
c906a3ec | 2909 | if (base->lcpa_regulator) { |
123e4ca1 | 2910 | ret = regulator_enable(base->lcpa_regulator); |
c906a3ec UH |
2911 | if (ret) |
2912 | return ret; | |
2913 | } | |
123e4ca1 | 2914 | |
c906a3ec | 2915 | return pm_runtime_force_resume(dev); |
123e4ca1 UH |
2916 | } |
2917 | #endif | |
2918 | ||
2919 | #ifdef CONFIG_PM | |
2920 | static void dma40_backup(void __iomem *baseaddr, u32 *backup, | |
2921 | u32 *regaddr, int num, bool save) | |
2922 | { | |
2923 | int i; | |
2924 | ||
2925 | for (i = 0; i < num; i++) { | |
2926 | void __iomem *addr = baseaddr + regaddr[i]; | |
2927 | ||
2928 | if (save) | |
2929 | backup[i] = readl_relaxed(addr); | |
2930 | else | |
2931 | writel_relaxed(backup[i], addr); | |
2932 | } | |
2933 | } | |
2934 | ||
2935 | static void d40_save_restore_registers(struct d40_base *base, bool save) | |
2936 | { | |
2937 | int i; | |
2938 | ||
2939 | /* Save/Restore channel specific registers */ | |
2940 | for (i = 0; i < base->num_phy_chans; i++) { | |
2941 | void __iomem *addr; | |
2942 | int idx; | |
2943 | ||
2944 | if (base->phy_res[i].reserved) | |
2945 | continue; | |
2946 | ||
2947 | addr = base->virtbase + D40_DREG_PCBASE + i * D40_DREG_PCDELTA; | |
2948 | idx = i * ARRAY_SIZE(d40_backup_regs_chan); | |
2949 | ||
2950 | dma40_backup(addr, &base->reg_val_backup_chan[idx], | |
2951 | d40_backup_regs_chan, | |
2952 | ARRAY_SIZE(d40_backup_regs_chan), | |
2953 | save); | |
2954 | } | |
2955 | ||
2956 | /* Save/Restore global registers */ | |
2957 | dma40_backup(base->virtbase, base->reg_val_backup, | |
2958 | d40_backup_regs, ARRAY_SIZE(d40_backup_regs), | |
2959 | save); | |
2960 | ||
2961 | /* Save/Restore registers only existing on dma40 v3 and later */ | |
2962 | if (base->gen_dmac.backup) | |
2963 | dma40_backup(base->virtbase, base->reg_val_backup_v4, | |
2964 | base->gen_dmac.backup, | |
2965 | base->gen_dmac.backup_size, | |
2966 | save); | |
2967 | } | |
2968 | ||
7fb3e75e N |
2969 | static int dma40_runtime_suspend(struct device *dev) |
2970 | { | |
be34c218 | 2971 | struct d40_base *base = dev_get_drvdata(dev); |
7fb3e75e N |
2972 | |
2973 | d40_save_restore_registers(base, true); | |
2974 | ||
2975 | /* Don't disable/enable clocks for v1 due to HW bugs */ | |
2976 | if (base->rev != 1) | |
2977 | writel_relaxed(base->gcc_pwr_off_mask, | |
2978 | base->virtbase + D40_DREG_GCC); | |
2979 | ||
2980 | return 0; | |
2981 | } | |
2982 | ||
2983 | static int dma40_runtime_resume(struct device *dev) | |
2984 | { | |
be34c218 | 2985 | struct d40_base *base = dev_get_drvdata(dev); |
7fb3e75e | 2986 | |
2dafca17 | 2987 | d40_save_restore_registers(base, false); |
7fb3e75e N |
2988 | |
2989 | writel_relaxed(D40_DREG_GCC_ENABLE_ALL, | |
2990 | base->virtbase + D40_DREG_GCC); | |
2991 | return 0; | |
2992 | } | |
123e4ca1 | 2993 | #endif |
7fb3e75e N |
2994 | |
2995 | static const struct dev_pm_ops dma40_pm_ops = { | |
673d3773 | 2996 | SET_LATE_SYSTEM_SLEEP_PM_OPS(dma40_suspend, dma40_resume) |
6ed23b80 | 2997 | SET_RUNTIME_PM_OPS(dma40_runtime_suspend, |
123e4ca1 UH |
2998 | dma40_runtime_resume, |
2999 | NULL) | |
7fb3e75e | 3000 | }; |
7fb3e75e | 3001 | |
8d318a50 LW |
3002 | /* Initialization functions. */ |
3003 | ||
3004 | static int __init d40_phy_res_init(struct d40_base *base) | |
3005 | { | |
3006 | int i; | |
3007 | int num_phy_chans_avail = 0; | |
3008 | u32 val[2]; | |
3009 | int odd_even_bit = -2; | |
7fb3e75e | 3010 | int gcc = D40_DREG_GCC_ENA; |
8d318a50 LW |
3011 | |
3012 | val[0] = readl(base->virtbase + D40_DREG_PRSME); | |
3013 | val[1] = readl(base->virtbase + D40_DREG_PRSMO); | |
3014 | ||
3015 | for (i = 0; i < base->num_phy_chans; i++) { | |
3016 | base->phy_res[i].num = i; | |
3017 | odd_even_bit += 2 * ((i % 2) == 0); | |
3018 | if (((val[i % 2] >> odd_even_bit) & 3) == 1) { | |
3019 | /* Mark security only channels as occupied */ | |
3020 | base->phy_res[i].allocated_src = D40_ALLOC_PHY; | |
3021 | base->phy_res[i].allocated_dst = D40_ALLOC_PHY; | |
7fb3e75e N |
3022 | base->phy_res[i].reserved = true; |
3023 | gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(i), | |
3024 | D40_DREG_GCC_SRC); | |
3025 | gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(i), | |
3026 | D40_DREG_GCC_DST); | |
3027 | ||
3028 | ||
8d318a50 LW |
3029 | } else { |
3030 | base->phy_res[i].allocated_src = D40_ALLOC_FREE; | |
3031 | base->phy_res[i].allocated_dst = D40_ALLOC_FREE; | |
7fb3e75e | 3032 | base->phy_res[i].reserved = false; |
8d318a50 LW |
3033 | num_phy_chans_avail++; |
3034 | } | |
3035 | spin_lock_init(&base->phy_res[i].lock); | |
3036 | } | |
6b7acd84 JA |
3037 | |
3038 | /* Mark disabled channels as occupied */ | |
3039 | for (i = 0; base->plat_data->disabled_channels[i] != -1; i++) { | |
f57b407c RV |
3040 | int chan = base->plat_data->disabled_channels[i]; |
3041 | ||
3042 | base->phy_res[chan].allocated_src = D40_ALLOC_PHY; | |
3043 | base->phy_res[chan].allocated_dst = D40_ALLOC_PHY; | |
7fb3e75e N |
3044 | base->phy_res[chan].reserved = true; |
3045 | gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(chan), | |
3046 | D40_DREG_GCC_SRC); | |
3047 | gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(chan), | |
3048 | D40_DREG_GCC_DST); | |
f57b407c | 3049 | num_phy_chans_avail--; |
6b7acd84 JA |
3050 | } |
3051 | ||
7407048b FB |
3052 | /* Mark soft_lli channels */ |
3053 | for (i = 0; i < base->plat_data->num_of_soft_lli_chans; i++) { | |
3054 | int chan = base->plat_data->soft_lli_chans[i]; | |
3055 | ||
3056 | base->phy_res[chan].use_soft_lli = true; | |
3057 | } | |
3058 | ||
8d318a50 LW |
3059 | dev_info(base->dev, "%d of %d physical DMA channels available\n", |
3060 | num_phy_chans_avail, base->num_phy_chans); | |
3061 | ||
3062 | /* Verify settings extended vs standard */ | |
3063 | val[0] = readl(base->virtbase + D40_DREG_PRTYP); | |
3064 | ||
3065 | for (i = 0; i < base->num_phy_chans; i++) { | |
3066 | ||
3067 | if (base->phy_res[i].allocated_src == D40_ALLOC_FREE && | |
3068 | (val[0] & 0x3) != 1) | |
3069 | dev_info(base->dev, | |
3070 | "[%s] INFO: channel %d is misconfigured (%d)\n", | |
3071 | __func__, i, val[0] & 0x3); | |
3072 | ||
3073 | val[0] = val[0] >> 2; | |
3074 | } | |
3075 | ||
7fb3e75e N |
3076 | /* |
3077 | * To keep things simple, Enable all clocks initially. | |
3078 | * The clocks will get managed later post channel allocation. | |
3079 | * The clocks for the event lines on which reserved channels exists | |
3080 | * are not managed here. | |
3081 | */ | |
3082 | writel(D40_DREG_GCC_ENABLE_ALL, base->virtbase + D40_DREG_GCC); | |
3083 | base->gcc_pwr_off_mask = gcc; | |
3084 | ||
8d318a50 LW |
3085 | return num_phy_chans_avail; |
3086 | } | |
3087 | ||
3088 | static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) | |
3089 | { | |
d4adcc01 | 3090 | struct stedma40_platform_data *plat_data = dev_get_platdata(&pdev->dev); |
11f7a8d1 ME |
3091 | struct clk *clk; |
3092 | void __iomem *virtbase; | |
3093 | struct resource *res; | |
3094 | struct d40_base *base; | |
3095 | int num_log_chans; | |
8d318a50 | 3096 | int num_phy_chans; |
a7dacb68 | 3097 | int num_memcpy_chans; |
b707c658 | 3098 | int clk_ret = -EINVAL; |
8d318a50 | 3099 | int i; |
f4b89764 LW |
3100 | u32 pid; |
3101 | u32 cid; | |
3102 | u8 rev; | |
8d318a50 LW |
3103 | |
3104 | clk = clk_get(&pdev->dev, NULL); | |
8d318a50 | 3105 | if (IS_ERR(clk)) { |
6db5a8ba | 3106 | d40_err(&pdev->dev, "No matching clock found\n"); |
f4534adb | 3107 | goto check_prepare_enabled; |
8d318a50 LW |
3108 | } |
3109 | ||
b707c658 UH |
3110 | clk_ret = clk_prepare_enable(clk); |
3111 | if (clk_ret) { | |
3112 | d40_err(&pdev->dev, "Failed to prepare/enable clock\n"); | |
f4534adb | 3113 | goto disable_unprepare; |
b707c658 | 3114 | } |
8d318a50 LW |
3115 | |
3116 | /* Get IO for DMAC base address */ | |
3117 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "base"); | |
3118 | if (!res) | |
f4534adb | 3119 | goto disable_unprepare; |
8d318a50 LW |
3120 | |
3121 | if (request_mem_region(res->start, resource_size(res), | |
3122 | D40_NAME " I/O base") == NULL) | |
f4534adb | 3123 | goto release_region; |
8d318a50 LW |
3124 | |
3125 | virtbase = ioremap(res->start, resource_size(res)); | |
3126 | if (!virtbase) | |
f4534adb | 3127 | goto release_region; |
8d318a50 | 3128 | |
f4b89764 LW |
3129 | /* This is just a regular AMBA PrimeCell ID actually */ |
3130 | for (pid = 0, i = 0; i < 4; i++) | |
3131 | pid |= (readl(virtbase + resource_size(res) - 0x20 + 4 * i) | |
3132 | & 255) << (i * 8); | |
3133 | for (cid = 0, i = 0; i < 4; i++) | |
3134 | cid |= (readl(virtbase + resource_size(res) - 0x10 + 4 * i) | |
3135 | & 255) << (i * 8); | |
8d318a50 | 3136 | |
f4b89764 LW |
3137 | if (cid != AMBA_CID) { |
3138 | d40_err(&pdev->dev, "Unknown hardware! No PrimeCell ID\n"); | |
f4534adb | 3139 | goto unmap_io; |
f4b89764 LW |
3140 | } |
3141 | if (AMBA_MANF_BITS(pid) != AMBA_VENDOR_ST) { | |
6db5a8ba | 3142 | d40_err(&pdev->dev, "Unknown designer! Got %x wanted %x\n", |
f4b89764 LW |
3143 | AMBA_MANF_BITS(pid), |
3144 | AMBA_VENDOR_ST); | |
f4534adb | 3145 | goto unmap_io; |
8d318a50 | 3146 | } |
f4b89764 LW |
3147 | /* |
3148 | * HW revision: | |
3149 | * DB8500ed has revision 0 | |
3150 | * ? has revision 1 | |
3151 | * DB8500v1 has revision 2 | |
3152 | * DB8500v2 has revision 3 | |
47db92f4 GB |
3153 | * AP9540v1 has revision 4 |
3154 | * DB8540v1 has revision 4 | |
f4b89764 LW |
3155 | */ |
3156 | rev = AMBA_REV_BITS(pid); | |
8b2fe9b6 LJ |
3157 | if (rev < 2) { |
3158 | d40_err(&pdev->dev, "hardware revision: %d is not supported", rev); | |
f4534adb | 3159 | goto unmap_io; |
8b2fe9b6 | 3160 | } |
3ae0267f | 3161 | |
8d318a50 | 3162 | /* The number of physical channels on this HW */ |
47db92f4 GB |
3163 | if (plat_data->num_of_phy_chans) |
3164 | num_phy_chans = plat_data->num_of_phy_chans; | |
3165 | else | |
3166 | num_phy_chans = 4 * (readl(virtbase + D40_DREG_ICFG) & 0x7) + 4; | |
8d318a50 | 3167 | |
a7dacb68 LJ |
3168 | /* The number of channels used for memcpy */ |
3169 | if (plat_data->num_of_memcpy_chans) | |
3170 | num_memcpy_chans = plat_data->num_of_memcpy_chans; | |
3171 | else | |
3172 | num_memcpy_chans = ARRAY_SIZE(dma40_memcpy_channels); | |
3173 | ||
db72da92 LJ |
3174 | num_log_chans = num_phy_chans * D40_MAX_LOG_CHAN_PER_PHY; |
3175 | ||
b2abb249 | 3176 | dev_info(&pdev->dev, |
3a919d5b FE |
3177 | "hardware rev: %d @ %pa with %d physical and %d logical channels\n", |
3178 | rev, &res->start, num_phy_chans, num_log_chans); | |
8d318a50 | 3179 | |
8d318a50 | 3180 | base = kzalloc(ALIGN(sizeof(struct d40_base), 4) + |
a7dacb68 | 3181 | (num_phy_chans + num_log_chans + num_memcpy_chans) * |
8d318a50 LW |
3182 | sizeof(struct d40_chan), GFP_KERNEL); |
3183 | ||
aef94fea | 3184 | if (base == NULL) |
f4534adb | 3185 | goto unmap_io; |
8d318a50 | 3186 | |
3ae0267f | 3187 | base->rev = rev; |
8d318a50 | 3188 | base->clk = clk; |
a7dacb68 | 3189 | base->num_memcpy_chans = num_memcpy_chans; |
8d318a50 LW |
3190 | base->num_phy_chans = num_phy_chans; |
3191 | base->num_log_chans = num_log_chans; | |
3192 | base->phy_start = res->start; | |
3193 | base->phy_size = resource_size(res); | |
3194 | base->virtbase = virtbase; | |
3195 | base->plat_data = plat_data; | |
3196 | base->dev = &pdev->dev; | |
3197 | base->phy_chans = ((void *)base) + ALIGN(sizeof(struct d40_base), 4); | |
3198 | base->log_chans = &base->phy_chans[num_phy_chans]; | |
3199 | ||
3cb645dc TL |
3200 | if (base->plat_data->num_of_phy_chans == 14) { |
3201 | base->gen_dmac.backup = d40_backup_regs_v4b; | |
3202 | base->gen_dmac.backup_size = BACKUP_REGS_SZ_V4B; | |
3203 | base->gen_dmac.interrupt_en = D40_DREG_CPCMIS; | |
3204 | base->gen_dmac.interrupt_clear = D40_DREG_CPCICR; | |
3205 | base->gen_dmac.realtime_en = D40_DREG_CRSEG1; | |
3206 | base->gen_dmac.realtime_clear = D40_DREG_CRCEG1; | |
3207 | base->gen_dmac.high_prio_en = D40_DREG_CPSEG1; | |
3208 | base->gen_dmac.high_prio_clear = D40_DREG_CPCEG1; | |
3209 | base->gen_dmac.il = il_v4b; | |
3210 | base->gen_dmac.il_size = ARRAY_SIZE(il_v4b); | |
3211 | base->gen_dmac.init_reg = dma_init_reg_v4b; | |
3212 | base->gen_dmac.init_reg_size = ARRAY_SIZE(dma_init_reg_v4b); | |
3213 | } else { | |
3214 | if (base->rev >= 3) { | |
3215 | base->gen_dmac.backup = d40_backup_regs_v4a; | |
3216 | base->gen_dmac.backup_size = BACKUP_REGS_SZ_V4A; | |
3217 | } | |
3218 | base->gen_dmac.interrupt_en = D40_DREG_PCMIS; | |
3219 | base->gen_dmac.interrupt_clear = D40_DREG_PCICR; | |
3220 | base->gen_dmac.realtime_en = D40_DREG_RSEG1; | |
3221 | base->gen_dmac.realtime_clear = D40_DREG_RCEG1; | |
3222 | base->gen_dmac.high_prio_en = D40_DREG_PSEG1; | |
3223 | base->gen_dmac.high_prio_clear = D40_DREG_PCEG1; | |
3224 | base->gen_dmac.il = il_v4a; | |
3225 | base->gen_dmac.il_size = ARRAY_SIZE(il_v4a); | |
3226 | base->gen_dmac.init_reg = dma_init_reg_v4a; | |
3227 | base->gen_dmac.init_reg_size = ARRAY_SIZE(dma_init_reg_v4a); | |
3228 | } | |
3229 | ||
e349d4b7 ME |
3230 | base->phy_res = kcalloc(num_phy_chans, |
3231 | sizeof(*base->phy_res), | |
8d318a50 LW |
3232 | GFP_KERNEL); |
3233 | if (!base->phy_res) | |
f4534adb | 3234 | goto free_base; |
8d318a50 | 3235 | |
e349d4b7 ME |
3236 | base->lookup_phy_chans = kcalloc(num_phy_chans, |
3237 | sizeof(*base->lookup_phy_chans), | |
8d318a50 LW |
3238 | GFP_KERNEL); |
3239 | if (!base->lookup_phy_chans) | |
f4534adb | 3240 | goto free_phy_res; |
8d318a50 | 3241 | |
e349d4b7 ME |
3242 | base->lookup_log_chans = kcalloc(num_log_chans, |
3243 | sizeof(*base->lookup_log_chans), | |
8a59fed3 LJ |
3244 | GFP_KERNEL); |
3245 | if (!base->lookup_log_chans) | |
f4534adb | 3246 | goto free_phy_chans; |
698e4732 | 3247 | |
28c01058 ME |
3248 | base->reg_val_backup_chan = kmalloc_array(base->num_phy_chans, |
3249 | sizeof(d40_backup_regs_chan), | |
3250 | GFP_KERNEL); | |
7fb3e75e | 3251 | if (!base->reg_val_backup_chan) |
f4534adb | 3252 | goto free_log_chans; |
7fb3e75e | 3253 | |
e349d4b7 ME |
3254 | base->lcla_pool.alloc_map = kcalloc(num_phy_chans |
3255 | * D40_LCLA_LINK_PER_EVENT_GRP, | |
3256 | sizeof(*base->lcla_pool.alloc_map), | |
3257 | GFP_KERNEL); | |
8d318a50 | 3258 | if (!base->lcla_pool.alloc_map) |
f4534adb | 3259 | goto free_backup_chan; |
8d318a50 | 3260 | |
c675b1b4 JA |
3261 | base->desc_slab = kmem_cache_create(D40_NAME, sizeof(struct d40_desc), |
3262 | 0, SLAB_HWCACHE_ALIGN, | |
3263 | NULL); | |
3264 | if (base->desc_slab == NULL) | |
f4534adb | 3265 | goto free_map; |
c675b1b4 | 3266 | |
8d318a50 | 3267 | return base; |
f4534adb ME |
3268 | free_map: |
3269 | kfree(base->lcla_pool.alloc_map); | |
3270 | free_backup_chan: | |
3271 | kfree(base->reg_val_backup_chan); | |
3272 | free_log_chans: | |
3273 | kfree(base->lookup_log_chans); | |
3274 | free_phy_chans: | |
3275 | kfree(base->lookup_phy_chans); | |
3276 | free_phy_res: | |
3277 | kfree(base->phy_res); | |
3278 | free_base: | |
3279 | kfree(base); | |
3280 | unmap_io: | |
3281 | iounmap(virtbase); | |
3282 | release_region: | |
3283 | release_mem_region(res->start, resource_size(res)); | |
3284 | check_prepare_enabled: | |
b707c658 | 3285 | if (!clk_ret) |
f4534adb | 3286 | disable_unprepare: |
b707c658 UH |
3287 | clk_disable_unprepare(clk); |
3288 | if (!IS_ERR(clk)) | |
8d318a50 | 3289 | clk_put(clk); |
8d318a50 LW |
3290 | return NULL; |
3291 | } | |
3292 | ||
3293 | static void __init d40_hw_init(struct d40_base *base) | |
3294 | { | |
3295 | ||
8d318a50 LW |
3296 | int i; |
3297 | u32 prmseo[2] = {0, 0}; | |
3298 | u32 activeo[2] = {0xFFFFFFFF, 0xFFFFFFFF}; | |
3299 | u32 pcmis = 0; | |
3300 | u32 pcicr = 0; | |
3cb645dc TL |
3301 | struct d40_reg_val *dma_init_reg = base->gen_dmac.init_reg; |
3302 | u32 reg_size = base->gen_dmac.init_reg_size; | |
8d318a50 | 3303 | |
3cb645dc | 3304 | for (i = 0; i < reg_size; i++) |
8d318a50 LW |
3305 | writel(dma_init_reg[i].val, |
3306 | base->virtbase + dma_init_reg[i].reg); | |
3307 | ||
3308 | /* Configure all our dma channels to default settings */ | |
3309 | for (i = 0; i < base->num_phy_chans; i++) { | |
3310 | ||
3311 | activeo[i % 2] = activeo[i % 2] << 2; | |
3312 | ||
3313 | if (base->phy_res[base->num_phy_chans - i - 1].allocated_src | |
3314 | == D40_ALLOC_PHY) { | |
3315 | activeo[i % 2] |= 3; | |
3316 | continue; | |
3317 | } | |
3318 | ||
3319 | /* Enable interrupt # */ | |
3320 | pcmis = (pcmis << 1) | 1; | |
3321 | ||
3322 | /* Clear interrupt # */ | |
3323 | pcicr = (pcicr << 1) | 1; | |
3324 | ||
3325 | /* Set channel to physical mode */ | |
3326 | prmseo[i % 2] = prmseo[i % 2] << 2; | |
3327 | prmseo[i % 2] |= 1; | |
3328 | ||
3329 | } | |
3330 | ||
3331 | writel(prmseo[1], base->virtbase + D40_DREG_PRMSE); | |
3332 | writel(prmseo[0], base->virtbase + D40_DREG_PRMSO); | |
3333 | writel(activeo[1], base->virtbase + D40_DREG_ACTIVE); | |
3334 | writel(activeo[0], base->virtbase + D40_DREG_ACTIVO); | |
3335 | ||
3336 | /* Write which interrupt to enable */ | |
3cb645dc | 3337 | writel(pcmis, base->virtbase + base->gen_dmac.interrupt_en); |
8d318a50 LW |
3338 | |
3339 | /* Write which interrupt to clear */ | |
3cb645dc | 3340 | writel(pcicr, base->virtbase + base->gen_dmac.interrupt_clear); |
8d318a50 | 3341 | |
3cb645dc TL |
3342 | /* These are __initdata and cannot be accessed after init */ |
3343 | base->gen_dmac.init_reg = NULL; | |
3344 | base->gen_dmac.init_reg_size = 0; | |
8d318a50 LW |
3345 | } |
3346 | ||
508849ad LW |
3347 | static int __init d40_lcla_allocate(struct d40_base *base) |
3348 | { | |
026cbc42 | 3349 | struct d40_lcla_pool *pool = &base->lcla_pool; |
508849ad LW |
3350 | unsigned long *page_list; |
3351 | int i, j; | |
abac5bac | 3352 | int ret; |
508849ad LW |
3353 | |
3354 | /* | |
3355 | * This is somewhat ugly. We need 8192 bytes that are 18 bit aligned, | |
3356 | * To full fill this hardware requirement without wasting 256 kb | |
3357 | * we allocate pages until we get an aligned one. | |
3358 | */ | |
cf80ecf7 ME |
3359 | page_list = kmalloc_array(MAX_LCLA_ALLOC_ATTEMPTS, |
3360 | sizeof(*page_list), | |
3361 | GFP_KERNEL); | |
2c7f2f20 ME |
3362 | if (!page_list) |
3363 | return -ENOMEM; | |
508849ad LW |
3364 | |
3365 | /* Calculating how many pages that are required */ | |
3366 | base->lcla_pool.pages = SZ_1K * base->num_phy_chans / PAGE_SIZE; | |
3367 | ||
3368 | for (i = 0; i < MAX_LCLA_ALLOC_ATTEMPTS; i++) { | |
3369 | page_list[i] = __get_free_pages(GFP_KERNEL, | |
3370 | base->lcla_pool.pages); | |
3371 | if (!page_list[i]) { | |
3372 | ||
6db5a8ba RV |
3373 | d40_err(base->dev, "Failed to allocate %d pages.\n", |
3374 | base->lcla_pool.pages); | |
39375334 | 3375 | ret = -ENOMEM; |
508849ad LW |
3376 | |
3377 | for (j = 0; j < i; j++) | |
3378 | free_pages(page_list[j], base->lcla_pool.pages); | |
aae32ec6 | 3379 | goto free_page_list; |
508849ad LW |
3380 | } |
3381 | ||
3382 | if ((virt_to_phys((void *)page_list[i]) & | |
3383 | (LCLA_ALIGNMENT - 1)) == 0) | |
3384 | break; | |
3385 | } | |
3386 | ||
3387 | for (j = 0; j < i; j++) | |
3388 | free_pages(page_list[j], base->lcla_pool.pages); | |
3389 | ||
3390 | if (i < MAX_LCLA_ALLOC_ATTEMPTS) { | |
3391 | base->lcla_pool.base = (void *)page_list[i]; | |
3392 | } else { | |
767a9675 JA |
3393 | /* |
3394 | * After many attempts and no succees with finding the correct | |
3395 | * alignment, try with allocating a big buffer. | |
3396 | */ | |
508849ad LW |
3397 | dev_warn(base->dev, |
3398 | "[%s] Failed to get %d pages @ 18 bit align.\n", | |
3399 | __func__, base->lcla_pool.pages); | |
3400 | base->lcla_pool.base_unaligned = kmalloc(SZ_1K * | |
3401 | base->num_phy_chans + | |
3402 | LCLA_ALIGNMENT, | |
3403 | GFP_KERNEL); | |
3404 | if (!base->lcla_pool.base_unaligned) { | |
3405 | ret = -ENOMEM; | |
aae32ec6 | 3406 | goto free_page_list; |
508849ad LW |
3407 | } |
3408 | ||
3409 | base->lcla_pool.base = PTR_ALIGN(base->lcla_pool.base_unaligned, | |
3410 | LCLA_ALIGNMENT); | |
3411 | } | |
3412 | ||
026cbc42 RV |
3413 | pool->dma_addr = dma_map_single(base->dev, pool->base, |
3414 | SZ_1K * base->num_phy_chans, | |
3415 | DMA_TO_DEVICE); | |
3416 | if (dma_mapping_error(base->dev, pool->dma_addr)) { | |
3417 | pool->dma_addr = 0; | |
3418 | ret = -ENOMEM; | |
aae32ec6 | 3419 | goto free_page_list; |
026cbc42 RV |
3420 | } |
3421 | ||
508849ad LW |
3422 | writel(virt_to_phys(base->lcla_pool.base), |
3423 | base->virtbase + D40_DREG_LCLA); | |
abac5bac | 3424 | ret = 0; |
aae32ec6 | 3425 | free_page_list: |
508849ad LW |
3426 | kfree(page_list); |
3427 | return ret; | |
3428 | } | |
3429 | ||
1814a170 LJ |
3430 | static int __init d40_of_probe(struct platform_device *pdev, |
3431 | struct device_node *np) | |
3432 | { | |
3433 | struct stedma40_platform_data *pdata; | |
499c2bc3 | 3434 | int num_phy = 0, num_memcpy = 0, num_disabled = 0; |
cbbe13ea | 3435 | const __be32 *list; |
1814a170 | 3436 | |
71660223 | 3437 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
1814a170 LJ |
3438 | if (!pdata) |
3439 | return -ENOMEM; | |
3440 | ||
fd59f9e6 LJ |
3441 | /* If absent this value will be obtained from h/w. */ |
3442 | of_property_read_u32(np, "dma-channels", &num_phy); | |
3443 | if (num_phy > 0) | |
3444 | pdata->num_of_phy_chans = num_phy; | |
3445 | ||
a7dacb68 LJ |
3446 | list = of_get_property(np, "memcpy-channels", &num_memcpy); |
3447 | num_memcpy /= sizeof(*list); | |
3448 | ||
3449 | if (num_memcpy > D40_MEMCPY_MAX_CHANS || num_memcpy <= 0) { | |
3450 | d40_err(&pdev->dev, | |
3451 | "Invalid number of memcpy channels specified (%d)\n", | |
3452 | num_memcpy); | |
3453 | return -EINVAL; | |
3454 | } | |
3455 | pdata->num_of_memcpy_chans = num_memcpy; | |
3456 | ||
3457 | of_property_read_u32_array(np, "memcpy-channels", | |
3458 | dma40_memcpy_channels, | |
3459 | num_memcpy); | |
3460 | ||
499c2bc3 LJ |
3461 | list = of_get_property(np, "disabled-channels", &num_disabled); |
3462 | num_disabled /= sizeof(*list); | |
3463 | ||
5be2190a | 3464 | if (num_disabled >= STEDMA40_MAX_PHYS || num_disabled < 0) { |
499c2bc3 LJ |
3465 | d40_err(&pdev->dev, |
3466 | "Invalid number of disabled channels specified (%d)\n", | |
3467 | num_disabled); | |
3468 | return -EINVAL; | |
3469 | } | |
3470 | ||
3471 | of_property_read_u32_array(np, "disabled-channels", | |
3472 | pdata->disabled_channels, | |
3473 | num_disabled); | |
3474 | pdata->disabled_channels[num_disabled] = -1; | |
3475 | ||
1814a170 LJ |
3476 | pdev->dev.platform_data = pdata; |
3477 | ||
3478 | return 0; | |
3479 | } | |
3480 | ||
8d318a50 LW |
3481 | static int __init d40_probe(struct platform_device *pdev) |
3482 | { | |
d4adcc01 | 3483 | struct stedma40_platform_data *plat_data = dev_get_platdata(&pdev->dev); |
1814a170 | 3484 | struct device_node *np = pdev->dev.of_node; |
8d318a50 | 3485 | int ret = -ENOENT; |
a9bae06d | 3486 | struct d40_base *base; |
aeb8974a | 3487 | struct resource *res; |
8d318a50 LW |
3488 | int num_reserved_chans; |
3489 | u32 val; | |
3490 | ||
1814a170 LJ |
3491 | if (!plat_data) { |
3492 | if (np) { | |
fe146473 | 3493 | if (d40_of_probe(pdev, np)) { |
1814a170 | 3494 | ret = -ENOMEM; |
a9bae06d | 3495 | goto report_failure; |
1814a170 LJ |
3496 | } |
3497 | } else { | |
3498 | d40_err(&pdev->dev, "No pdata or Device Tree provided\n"); | |
a9bae06d | 3499 | goto report_failure; |
1814a170 LJ |
3500 | } |
3501 | } | |
8d318a50 | 3502 | |
1814a170 | 3503 | base = d40_hw_detect_init(pdev); |
8d318a50 | 3504 | if (!base) |
a9bae06d | 3505 | goto report_failure; |
8d318a50 LW |
3506 | |
3507 | num_reserved_chans = d40_phy_res_init(base); | |
3508 | ||
3509 | platform_set_drvdata(pdev, base); | |
3510 | ||
3511 | spin_lock_init(&base->interrupt_lock); | |
3512 | spin_lock_init(&base->execmd_lock); | |
3513 | ||
3514 | /* Get IO for logical channel parameter address */ | |
3515 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lcpa"); | |
3516 | if (!res) { | |
3517 | ret = -ENOENT; | |
6db5a8ba | 3518 | d40_err(&pdev->dev, "No \"lcpa\" memory resource\n"); |
d7b7ecce | 3519 | goto destroy_cache; |
8d318a50 LW |
3520 | } |
3521 | base->lcpa_size = resource_size(res); | |
3522 | base->phy_lcpa = res->start; | |
3523 | ||
3524 | if (request_mem_region(res->start, resource_size(res), | |
3525 | D40_NAME " I/O lcpa") == NULL) { | |
3526 | ret = -EBUSY; | |
3a919d5b | 3527 | d40_err(&pdev->dev, "Failed to request LCPA region %pR\n", res); |
d7b7ecce | 3528 | goto destroy_cache; |
8d318a50 LW |
3529 | } |
3530 | ||
3531 | /* We make use of ESRAM memory for this. */ | |
3532 | val = readl(base->virtbase + D40_DREG_LCPA); | |
3533 | if (res->start != val && val != 0) { | |
3534 | dev_warn(&pdev->dev, | |
3a919d5b FE |
3535 | "[%s] Mismatch LCPA dma 0x%x, def %pa\n", |
3536 | __func__, val, &res->start); | |
8d318a50 LW |
3537 | } else |
3538 | writel(res->start, base->virtbase + D40_DREG_LCPA); | |
3539 | ||
3540 | base->lcpa_base = ioremap(res->start, resource_size(res)); | |
3541 | if (!base->lcpa_base) { | |
3542 | ret = -ENOMEM; | |
6db5a8ba | 3543 | d40_err(&pdev->dev, "Failed to ioremap LCPA region\n"); |
d7b7ecce | 3544 | goto destroy_cache; |
8d318a50 | 3545 | } |
28c7a19d N |
3546 | /* If lcla has to be located in ESRAM we don't need to allocate */ |
3547 | if (base->plat_data->use_esram_lcla) { | |
3548 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
3549 | "lcla_esram"); | |
3550 | if (!res) { | |
3551 | ret = -ENOENT; | |
3552 | d40_err(&pdev->dev, | |
3553 | "No \"lcla_esram\" memory resource\n"); | |
d7b7ecce | 3554 | goto destroy_cache; |
28c7a19d N |
3555 | } |
3556 | base->lcla_pool.base = ioremap(res->start, | |
3557 | resource_size(res)); | |
3558 | if (!base->lcla_pool.base) { | |
3559 | ret = -ENOMEM; | |
3560 | d40_err(&pdev->dev, "Failed to ioremap LCLA region\n"); | |
d7b7ecce | 3561 | goto destroy_cache; |
28c7a19d N |
3562 | } |
3563 | writel(res->start, base->virtbase + D40_DREG_LCLA); | |
8d318a50 | 3564 | |
28c7a19d N |
3565 | } else { |
3566 | ret = d40_lcla_allocate(base); | |
3567 | if (ret) { | |
3568 | d40_err(&pdev->dev, "Failed to allocate LCLA area\n"); | |
d7b7ecce | 3569 | goto destroy_cache; |
28c7a19d | 3570 | } |
8d318a50 LW |
3571 | } |
3572 | ||
3573 | spin_lock_init(&base->lcla_pool.lock); | |
3574 | ||
8d318a50 LW |
3575 | base->irq = platform_get_irq(pdev, 0); |
3576 | ||
3577 | ret = request_irq(base->irq, d40_handle_interrupt, 0, D40_NAME, base); | |
8d318a50 | 3578 | if (ret) { |
6db5a8ba | 3579 | d40_err(&pdev->dev, "No IRQ defined\n"); |
d7b7ecce | 3580 | goto destroy_cache; |
8d318a50 LW |
3581 | } |
3582 | ||
28c7a19d N |
3583 | if (base->plat_data->use_esram_lcla) { |
3584 | ||
3585 | base->lcpa_regulator = regulator_get(base->dev, "lcla_esram"); | |
3586 | if (IS_ERR(base->lcpa_regulator)) { | |
3587 | d40_err(&pdev->dev, "Failed to get lcpa_regulator\n"); | |
8581bbcd | 3588 | ret = PTR_ERR(base->lcpa_regulator); |
28c7a19d | 3589 | base->lcpa_regulator = NULL; |
d7b7ecce | 3590 | goto destroy_cache; |
28c7a19d N |
3591 | } |
3592 | ||
3593 | ret = regulator_enable(base->lcpa_regulator); | |
3594 | if (ret) { | |
3595 | d40_err(&pdev->dev, | |
3596 | "Failed to enable lcpa_regulator\n"); | |
3597 | regulator_put(base->lcpa_regulator); | |
3598 | base->lcpa_regulator = NULL; | |
d7b7ecce | 3599 | goto destroy_cache; |
28c7a19d N |
3600 | } |
3601 | } | |
3602 | ||
2dafca17 UH |
3603 | writel_relaxed(D40_DREG_GCC_ENABLE_ALL, base->virtbase + D40_DREG_GCC); |
3604 | ||
3605 | pm_runtime_irq_safe(base->dev); | |
3606 | pm_runtime_set_autosuspend_delay(base->dev, DMA40_AUTOSUSPEND_DELAY); | |
3607 | pm_runtime_use_autosuspend(base->dev); | |
3608 | pm_runtime_mark_last_busy(base->dev); | |
3609 | pm_runtime_set_active(base->dev); | |
3610 | pm_runtime_enable(base->dev); | |
3611 | ||
8581bbcd WY |
3612 | ret = d40_dmaengine_init(base, num_reserved_chans); |
3613 | if (ret) | |
d7b7ecce | 3614 | goto destroy_cache; |
8d318a50 | 3615 | |
b96710e5 | 3616 | base->dev->dma_parms = &base->dma_parms; |
8581bbcd WY |
3617 | ret = dma_set_max_seg_size(base->dev, STEDMA40_MAX_SEG_SIZE); |
3618 | if (ret) { | |
b96710e5 | 3619 | d40_err(&pdev->dev, "Failed to set dma max seg size\n"); |
d7b7ecce | 3620 | goto destroy_cache; |
b96710e5 PF |
3621 | } |
3622 | ||
8d318a50 LW |
3623 | d40_hw_init(base); |
3624 | ||
fa332de5 | 3625 | if (np) { |
8581bbcd WY |
3626 | ret = of_dma_controller_register(np, d40_xlate, NULL); |
3627 | if (ret) | |
fa332de5 LJ |
3628 | dev_err(&pdev->dev, |
3629 | "could not register of_dma_controller\n"); | |
3630 | } | |
3631 | ||
8d318a50 LW |
3632 | dev_info(base->dev, "initialized\n"); |
3633 | return 0; | |
d7b7ecce | 3634 | destroy_cache: |
a9bae06d ME |
3635 | kmem_cache_destroy(base->desc_slab); |
3636 | if (base->virtbase) | |
3637 | iounmap(base->virtbase); | |
026cbc42 | 3638 | |
a9bae06d ME |
3639 | if (base->lcla_pool.base && base->plat_data->use_esram_lcla) { |
3640 | iounmap(base->lcla_pool.base); | |
3641 | base->lcla_pool.base = NULL; | |
3642 | } | |
28c7a19d | 3643 | |
a9bae06d ME |
3644 | if (base->lcla_pool.dma_addr) |
3645 | dma_unmap_single(base->dev, base->lcla_pool.dma_addr, | |
3646 | SZ_1K * base->num_phy_chans, | |
3647 | DMA_TO_DEVICE); | |
8d318a50 | 3648 | |
a9bae06d ME |
3649 | if (!base->lcla_pool.base_unaligned && base->lcla_pool.base) |
3650 | free_pages((unsigned long)base->lcla_pool.base, | |
3651 | base->lcla_pool.pages); | |
28c7a19d | 3652 | |
a9bae06d ME |
3653 | kfree(base->lcla_pool.base_unaligned); |
3654 | ||
3655 | if (base->phy_lcpa) | |
3656 | release_mem_region(base->phy_lcpa, | |
3657 | base->lcpa_size); | |
3658 | if (base->phy_start) | |
3659 | release_mem_region(base->phy_start, | |
3660 | base->phy_size); | |
3661 | if (base->clk) { | |
3662 | clk_disable_unprepare(base->clk); | |
3663 | clk_put(base->clk); | |
3664 | } | |
3665 | ||
3666 | if (base->lcpa_regulator) { | |
3667 | regulator_disable(base->lcpa_regulator); | |
3668 | regulator_put(base->lcpa_regulator); | |
8d318a50 LW |
3669 | } |
3670 | ||
a9bae06d ME |
3671 | kfree(base->lcla_pool.alloc_map); |
3672 | kfree(base->lookup_log_chans); | |
3673 | kfree(base->lookup_phy_chans); | |
3674 | kfree(base->phy_res); | |
3675 | kfree(base); | |
876e0235 | 3676 | report_failure: |
6db5a8ba | 3677 | d40_err(&pdev->dev, "probe failed\n"); |
8d318a50 LW |
3678 | return ret; |
3679 | } | |
3680 | ||
1814a170 LJ |
3681 | static const struct of_device_id d40_match[] = { |
3682 | { .compatible = "stericsson,dma40", }, | |
3683 | {} | |
3684 | }; | |
3685 | ||
8d318a50 LW |
3686 | static struct platform_driver d40_driver = { |
3687 | .driver = { | |
8d318a50 | 3688 | .name = D40_NAME, |
123e4ca1 | 3689 | .pm = &dma40_pm_ops, |
1814a170 | 3690 | .of_match_table = d40_match, |
8d318a50 LW |
3691 | }, |
3692 | }; | |
3693 | ||
cb9ab2d8 | 3694 | static int __init stedma40_init(void) |
8d318a50 LW |
3695 | { |
3696 | return platform_driver_probe(&d40_driver, d40_probe); | |
3697 | } | |
a0eb221a | 3698 | subsys_initcall(stedma40_init); |