Commit | Line | Data |
---|---|---|
c01faaca FE |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // drivers/dma/imx-sdma.c | |
4 | // | |
5 | // This file contains a driver for the Freescale Smart DMA engine | |
6 | // | |
7 | // Copyright 2010 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> | |
8 | // | |
9 | // Based on code from Freescale: | |
10 | // | |
11 | // Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. | |
1ec1e82f SH |
12 | |
13 | #include <linux/init.h> | |
1d069bfa | 14 | #include <linux/iopoll.h> |
f8de8f4c | 15 | #include <linux/module.h> |
1ec1e82f | 16 | #include <linux/types.h> |
0bbc1413 | 17 | #include <linux/bitops.h> |
1ec1e82f SH |
18 | #include <linux/mm.h> |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/clk.h> | |
2ccaef05 | 21 | #include <linux/delay.h> |
1ec1e82f SH |
22 | #include <linux/sched.h> |
23 | #include <linux/semaphore.h> | |
24 | #include <linux/spinlock.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/dma-mapping.h> | |
27 | #include <linux/firmware.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/dmaengine.h> | |
580975d7 | 31 | #include <linux/of.h> |
8391ecf4 | 32 | #include <linux/of_address.h> |
580975d7 | 33 | #include <linux/of_device.h> |
9479e17c | 34 | #include <linux/of_dma.h> |
b8603d2a | 35 | #include <linux/workqueue.h> |
1ec1e82f SH |
36 | |
37 | #include <asm/irq.h> | |
82906b13 AB |
38 | #include <linux/platform_data/dma-imx-sdma.h> |
39 | #include <linux/platform_data/dma-imx.h> | |
d078cd1b ZW |
40 | #include <linux/regmap.h> |
41 | #include <linux/mfd/syscon.h> | |
42 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> | |
1ec1e82f | 43 | |
d2ebfb33 | 44 | #include "dmaengine.h" |
57b772b8 | 45 | #include "virt-dma.h" |
d2ebfb33 | 46 | |
1ec1e82f SH |
47 | /* SDMA registers */ |
48 | #define SDMA_H_C0PTR 0x000 | |
49 | #define SDMA_H_INTR 0x004 | |
50 | #define SDMA_H_STATSTOP 0x008 | |
51 | #define SDMA_H_START 0x00c | |
52 | #define SDMA_H_EVTOVR 0x010 | |
53 | #define SDMA_H_DSPOVR 0x014 | |
54 | #define SDMA_H_HOSTOVR 0x018 | |
55 | #define SDMA_H_EVTPEND 0x01c | |
56 | #define SDMA_H_DSPENBL 0x020 | |
57 | #define SDMA_H_RESET 0x024 | |
58 | #define SDMA_H_EVTERR 0x028 | |
59 | #define SDMA_H_INTRMSK 0x02c | |
60 | #define SDMA_H_PSW 0x030 | |
61 | #define SDMA_H_EVTERRDBG 0x034 | |
62 | #define SDMA_H_CONFIG 0x038 | |
63 | #define SDMA_ONCE_ENB 0x040 | |
64 | #define SDMA_ONCE_DATA 0x044 | |
65 | #define SDMA_ONCE_INSTR 0x048 | |
66 | #define SDMA_ONCE_STAT 0x04c | |
67 | #define SDMA_ONCE_CMD 0x050 | |
68 | #define SDMA_EVT_MIRROR 0x054 | |
69 | #define SDMA_ILLINSTADDR 0x058 | |
70 | #define SDMA_CHN0ADDR 0x05c | |
71 | #define SDMA_ONCE_RTB 0x060 | |
72 | #define SDMA_XTRIG_CONF1 0x070 | |
73 | #define SDMA_XTRIG_CONF2 0x074 | |
62550cd7 SG |
74 | #define SDMA_CHNENBL0_IMX35 0x200 |
75 | #define SDMA_CHNENBL0_IMX31 0x080 | |
1ec1e82f SH |
76 | #define SDMA_CHNPRI_0 0x100 |
77 | ||
78 | /* | |
79 | * Buffer descriptor status values. | |
80 | */ | |
81 | #define BD_DONE 0x01 | |
82 | #define BD_WRAP 0x02 | |
83 | #define BD_CONT 0x04 | |
84 | #define BD_INTR 0x08 | |
85 | #define BD_RROR 0x10 | |
86 | #define BD_LAST 0x20 | |
87 | #define BD_EXTD 0x80 | |
88 | ||
89 | /* | |
90 | * Data Node descriptor status values. | |
91 | */ | |
92 | #define DND_END_OF_FRAME 0x80 | |
93 | #define DND_END_OF_XFER 0x40 | |
94 | #define DND_DONE 0x20 | |
95 | #define DND_UNUSED 0x01 | |
96 | ||
97 | /* | |
98 | * IPCV2 descriptor status values. | |
99 | */ | |
100 | #define BD_IPCV2_END_OF_FRAME 0x40 | |
101 | ||
102 | #define IPCV2_MAX_NODES 50 | |
103 | /* | |
104 | * Error bit set in the CCB status field by the SDMA, | |
105 | * in setbd routine, in case of a transfer error | |
106 | */ | |
107 | #define DATA_ERROR 0x10000000 | |
108 | ||
109 | /* | |
110 | * Buffer descriptor commands. | |
111 | */ | |
112 | #define C0_ADDR 0x01 | |
113 | #define C0_LOAD 0x02 | |
114 | #define C0_DUMP 0x03 | |
115 | #define C0_SETCTX 0x07 | |
116 | #define C0_GETCTX 0x03 | |
117 | #define C0_SETDM 0x01 | |
118 | #define C0_SETPM 0x04 | |
119 | #define C0_GETDM 0x02 | |
120 | #define C0_GETPM 0x08 | |
121 | /* | |
122 | * Change endianness indicator in the BD command field | |
123 | */ | |
124 | #define CHANGE_ENDIANNESS 0x80 | |
125 | ||
8391ecf4 SW |
126 | /* |
127 | * p_2_p watermark_level description | |
128 | * Bits Name Description | |
129 | * 0-7 Lower WML Lower watermark level | |
130 | * 8 PS 1: Pad Swallowing | |
131 | * 0: No Pad Swallowing | |
132 | * 9 PA 1: Pad Adding | |
133 | * 0: No Pad Adding | |
134 | * 10 SPDIF If this bit is set both source | |
135 | * and destination are on SPBA | |
136 | * 11 Source Bit(SP) 1: Source on SPBA | |
137 | * 0: Source on AIPS | |
138 | * 12 Destination Bit(DP) 1: Destination on SPBA | |
139 | * 0: Destination on AIPS | |
140 | * 13-15 --------- MUST BE 0 | |
141 | * 16-23 Higher WML HWML | |
142 | * 24-27 N Total number of samples after | |
143 | * which Pad adding/Swallowing | |
144 | * must be done. It must be odd. | |
145 | * 28 Lower WML Event(LWE) SDMA events reg to check for | |
146 | * LWML event mask | |
147 | * 0: LWE in EVENTS register | |
148 | * 1: LWE in EVENTS2 register | |
149 | * 29 Higher WML Event(HWE) SDMA events reg to check for | |
150 | * HWML event mask | |
151 | * 0: HWE in EVENTS register | |
152 | * 1: HWE in EVENTS2 register | |
153 | * 30 --------- MUST BE 0 | |
154 | * 31 CONT 1: Amount of samples to be | |
155 | * transferred is unknown and | |
156 | * script will keep on | |
157 | * transferring samples as long as | |
158 | * both events are detected and | |
159 | * script must be manually stopped | |
160 | * by the application | |
161 | * 0: The amount of samples to be | |
162 | * transferred is equal to the | |
163 | * count field of mode word | |
164 | */ | |
165 | #define SDMA_WATERMARK_LEVEL_LWML 0xFF | |
166 | #define SDMA_WATERMARK_LEVEL_PS BIT(8) | |
167 | #define SDMA_WATERMARK_LEVEL_PA BIT(9) | |
168 | #define SDMA_WATERMARK_LEVEL_SPDIF BIT(10) | |
169 | #define SDMA_WATERMARK_LEVEL_SP BIT(11) | |
170 | #define SDMA_WATERMARK_LEVEL_DP BIT(12) | |
171 | #define SDMA_WATERMARK_LEVEL_HWML (0xFF << 16) | |
172 | #define SDMA_WATERMARK_LEVEL_LWE BIT(28) | |
173 | #define SDMA_WATERMARK_LEVEL_HWE BIT(29) | |
174 | #define SDMA_WATERMARK_LEVEL_CONT BIT(31) | |
175 | ||
f9d4a398 NC |
176 | #define SDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ |
177 | BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ | |
178 | BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) | |
179 | ||
180 | #define SDMA_DMA_DIRECTIONS (BIT(DMA_DEV_TO_MEM) | \ | |
181 | BIT(DMA_MEM_TO_DEV) | \ | |
182 | BIT(DMA_DEV_TO_DEV)) | |
183 | ||
1ec1e82f SH |
184 | /* |
185 | * Mode/Count of data node descriptors - IPCv2 | |
186 | */ | |
187 | struct sdma_mode_count { | |
4a6b2e8a | 188 | #define SDMA_BD_MAX_CNT 0xffff |
1ec1e82f SH |
189 | u32 count : 16; /* size of the buffer pointed by this BD */ |
190 | u32 status : 8; /* E,R,I,C,W,D status bits stored here */ | |
e4b75760 | 191 | u32 command : 8; /* command mostly used for channel 0 */ |
1ec1e82f SH |
192 | }; |
193 | ||
194 | /* | |
195 | * Buffer descriptor | |
196 | */ | |
197 | struct sdma_buffer_descriptor { | |
198 | struct sdma_mode_count mode; | |
199 | u32 buffer_addr; /* address of the buffer described */ | |
200 | u32 ext_buffer_addr; /* extended buffer address */ | |
201 | } __attribute__ ((packed)); | |
202 | ||
203 | /** | |
204 | * struct sdma_channel_control - Channel control Block | |
205 | * | |
24ca312d RG |
206 | * @current_bd_ptr: current buffer descriptor processed |
207 | * @base_bd_ptr: first element of buffer descriptor array | |
208 | * @unused: padding. The SDMA engine expects an array of 128 byte | |
1ec1e82f SH |
209 | * control blocks |
210 | */ | |
211 | struct sdma_channel_control { | |
212 | u32 current_bd_ptr; | |
213 | u32 base_bd_ptr; | |
214 | u32 unused[2]; | |
215 | } __attribute__ ((packed)); | |
216 | ||
217 | /** | |
218 | * struct sdma_state_registers - SDMA context for a channel | |
219 | * | |
220 | * @pc: program counter | |
24ca312d | 221 | * @unused1: unused |
1ec1e82f SH |
222 | * @t: test bit: status of arithmetic & test instruction |
223 | * @rpc: return program counter | |
24ca312d | 224 | * @unused0: unused |
1ec1e82f SH |
225 | * @sf: source fault while loading data |
226 | * @spc: loop start program counter | |
24ca312d | 227 | * @unused2: unused |
1ec1e82f SH |
228 | * @df: destination fault while storing data |
229 | * @epc: loop end program counter | |
230 | * @lm: loop mode | |
231 | */ | |
232 | struct sdma_state_registers { | |
233 | u32 pc :14; | |
234 | u32 unused1: 1; | |
235 | u32 t : 1; | |
236 | u32 rpc :14; | |
237 | u32 unused0: 1; | |
238 | u32 sf : 1; | |
239 | u32 spc :14; | |
240 | u32 unused2: 1; | |
241 | u32 df : 1; | |
242 | u32 epc :14; | |
243 | u32 lm : 2; | |
244 | } __attribute__ ((packed)); | |
245 | ||
246 | /** | |
247 | * struct sdma_context_data - sdma context specific to a channel | |
248 | * | |
249 | * @channel_state: channel state bits | |
250 | * @gReg: general registers | |
251 | * @mda: burst dma destination address register | |
252 | * @msa: burst dma source address register | |
253 | * @ms: burst dma status register | |
254 | * @md: burst dma data register | |
255 | * @pda: peripheral dma destination address register | |
256 | * @psa: peripheral dma source address register | |
257 | * @ps: peripheral dma status register | |
258 | * @pd: peripheral dma data register | |
259 | * @ca: CRC polynomial register | |
260 | * @cs: CRC accumulator register | |
261 | * @dda: dedicated core destination address register | |
262 | * @dsa: dedicated core source address register | |
263 | * @ds: dedicated core status register | |
264 | * @dd: dedicated core data register | |
24ca312d RG |
265 | * @scratch0: 1st word of dedicated ram for context switch |
266 | * @scratch1: 2nd word of dedicated ram for context switch | |
267 | * @scratch2: 3rd word of dedicated ram for context switch | |
268 | * @scratch3: 4th word of dedicated ram for context switch | |
269 | * @scratch4: 5th word of dedicated ram for context switch | |
270 | * @scratch5: 6th word of dedicated ram for context switch | |
271 | * @scratch6: 7th word of dedicated ram for context switch | |
272 | * @scratch7: 8th word of dedicated ram for context switch | |
1ec1e82f SH |
273 | */ |
274 | struct sdma_context_data { | |
275 | struct sdma_state_registers channel_state; | |
276 | u32 gReg[8]; | |
277 | u32 mda; | |
278 | u32 msa; | |
279 | u32 ms; | |
280 | u32 md; | |
281 | u32 pda; | |
282 | u32 psa; | |
283 | u32 ps; | |
284 | u32 pd; | |
285 | u32 ca; | |
286 | u32 cs; | |
287 | u32 dda; | |
288 | u32 dsa; | |
289 | u32 ds; | |
290 | u32 dd; | |
291 | u32 scratch0; | |
292 | u32 scratch1; | |
293 | u32 scratch2; | |
294 | u32 scratch3; | |
295 | u32 scratch4; | |
296 | u32 scratch5; | |
297 | u32 scratch6; | |
298 | u32 scratch7; | |
299 | } __attribute__ ((packed)); | |
300 | ||
1ec1e82f SH |
301 | |
302 | struct sdma_engine; | |
303 | ||
76c33d27 SH |
304 | /** |
305 | * struct sdma_desc - descriptor structor for one transfer | |
24ca312d RG |
306 | * @vd: descriptor for virt dma |
307 | * @num_bd: number of descriptors currently handling | |
308 | * @bd_phys: physical address of bd | |
309 | * @buf_tail: ID of the buffer that was processed | |
310 | * @buf_ptail: ID of the previous buffer that was processed | |
311 | * @period_len: period length, used in cyclic. | |
312 | * @chn_real_count: the real count updated from bd->mode.count | |
313 | * @chn_count: the transfer count set | |
314 | * @sdmac: sdma_channel pointer | |
315 | * @bd: pointer of allocate bd | |
76c33d27 SH |
316 | */ |
317 | struct sdma_desc { | |
57b772b8 | 318 | struct virt_dma_desc vd; |
76c33d27 SH |
319 | unsigned int num_bd; |
320 | dma_addr_t bd_phys; | |
321 | unsigned int buf_tail; | |
322 | unsigned int buf_ptail; | |
323 | unsigned int period_len; | |
324 | unsigned int chn_real_count; | |
325 | unsigned int chn_count; | |
326 | struct sdma_channel *sdmac; | |
327 | struct sdma_buffer_descriptor *bd; | |
328 | }; | |
329 | ||
1ec1e82f SH |
330 | /** |
331 | * struct sdma_channel - housekeeping for a SDMA channel | |
332 | * | |
24ca312d RG |
333 | * @vc: virt_dma base structure |
334 | * @desc: sdma description including vd and other special member | |
335 | * @sdma: pointer to the SDMA engine for this channel | |
336 | * @channel: the channel number, matches dmaengine chan_id + 1 | |
337 | * @direction: transfer type. Needed for setting SDMA script | |
107d0644 | 338 | * @slave_config Slave configuration |
24ca312d RG |
339 | * @peripheral_type: Peripheral type. Needed for setting SDMA script |
340 | * @event_id0: aka dma request line | |
341 | * @event_id1: for channels that use 2 events | |
342 | * @word_size: peripheral access size | |
343 | * @pc_from_device: script address for those device_2_memory | |
344 | * @pc_to_device: script address for those memory_2_device | |
345 | * @device_to_device: script address for those device_2_device | |
0f06c027 | 346 | * @pc_to_pc: script address for those memory_2_memory |
24ca312d RG |
347 | * @flags: loop mode or not |
348 | * @per_address: peripheral source or destination address in common case | |
349 | * destination address in p_2_p case | |
350 | * @per_address2: peripheral source address in p_2_p case | |
351 | * @event_mask: event mask used in p_2_p script | |
352 | * @watermark_level: value for gReg[7], some script will extend it from | |
353 | * basic watermark such as p_2_p | |
354 | * @shp_addr: value for gReg[6] | |
355 | * @per_addr: value for gReg[2] | |
356 | * @status: status of dma channel | |
357 | * @data: specific sdma interface structure | |
358 | * @bd_pool: dma_pool for bd | |
1ec1e82f SH |
359 | */ |
360 | struct sdma_channel { | |
57b772b8 | 361 | struct virt_dma_chan vc; |
76c33d27 | 362 | struct sdma_desc *desc; |
1ec1e82f SH |
363 | struct sdma_engine *sdma; |
364 | unsigned int channel; | |
db8196df | 365 | enum dma_transfer_direction direction; |
107d0644 | 366 | struct dma_slave_config slave_config; |
1ec1e82f SH |
367 | enum sdma_peripheral_type peripheral_type; |
368 | unsigned int event_id0; | |
369 | unsigned int event_id1; | |
370 | enum dma_slave_buswidth word_size; | |
1ec1e82f | 371 | unsigned int pc_from_device, pc_to_device; |
8391ecf4 | 372 | unsigned int device_to_device; |
0f06c027 | 373 | unsigned int pc_to_pc; |
1ec1e82f | 374 | unsigned long flags; |
8391ecf4 | 375 | dma_addr_t per_address, per_address2; |
0bbc1413 RZ |
376 | unsigned long event_mask[2]; |
377 | unsigned long watermark_level; | |
1ec1e82f | 378 | u32 shp_addr, per_addr; |
1ec1e82f | 379 | enum dma_status status; |
ad0d92d7 | 380 | bool context_loaded; |
0b351865 | 381 | struct imx_dma_data data; |
b8603d2a | 382 | struct work_struct terminate_worker; |
1ec1e82f SH |
383 | }; |
384 | ||
0bbc1413 | 385 | #define IMX_DMA_SG_LOOP BIT(0) |
1ec1e82f SH |
386 | |
387 | #define MAX_DMA_CHANNELS 32 | |
388 | #define MXC_SDMA_DEFAULT_PRIORITY 1 | |
389 | #define MXC_SDMA_MIN_PRIORITY 1 | |
390 | #define MXC_SDMA_MAX_PRIORITY 7 | |
391 | ||
1ec1e82f SH |
392 | #define SDMA_FIRMWARE_MAGIC 0x414d4453 |
393 | ||
394 | /** | |
395 | * struct sdma_firmware_header - Layout of the firmware image | |
396 | * | |
24ca312d RG |
397 | * @magic: "SDMA" |
398 | * @version_major: increased whenever layout of struct | |
399 | * sdma_script_start_addrs changes. | |
400 | * @version_minor: firmware minor version (for binary compatible changes) | |
401 | * @script_addrs_start: offset of struct sdma_script_start_addrs in this image | |
402 | * @num_script_addrs: Number of script addresses in this image | |
403 | * @ram_code_start: offset of SDMA ram image in this firmware image | |
404 | * @ram_code_size: size of SDMA ram image | |
405 | * @script_addrs: Stores the start address of the SDMA scripts | |
1ec1e82f SH |
406 | * (in SDMA memory space) |
407 | */ | |
408 | struct sdma_firmware_header { | |
409 | u32 magic; | |
410 | u32 version_major; | |
411 | u32 version_minor; | |
412 | u32 script_addrs_start; | |
413 | u32 num_script_addrs; | |
414 | u32 ram_code_start; | |
415 | u32 ram_code_size; | |
416 | }; | |
417 | ||
17bba72f SH |
418 | struct sdma_driver_data { |
419 | int chnenbl0; | |
420 | int num_events; | |
dcfec3c0 | 421 | struct sdma_script_start_addrs *script_addrs; |
941acd56 | 422 | bool check_ratio; |
62550cd7 SG |
423 | }; |
424 | ||
1ec1e82f SH |
425 | struct sdma_engine { |
426 | struct device *dev; | |
b9b3f82f | 427 | struct device_dma_parameters dma_parms; |
1ec1e82f SH |
428 | struct sdma_channel channel[MAX_DMA_CHANNELS]; |
429 | struct sdma_channel_control *channel_control; | |
430 | void __iomem *regs; | |
1ec1e82f SH |
431 | struct sdma_context_data *context; |
432 | dma_addr_t context_phys; | |
433 | struct dma_device dma_device; | |
7560e3f3 SH |
434 | struct clk *clk_ipg; |
435 | struct clk *clk_ahb; | |
2ccaef05 | 436 | spinlock_t channel_0_lock; |
cd72b846 | 437 | u32 script_number; |
1ec1e82f | 438 | struct sdma_script_start_addrs *script_addrs; |
17bba72f | 439 | const struct sdma_driver_data *drvdata; |
8391ecf4 SW |
440 | u32 spba_start_addr; |
441 | u32 spba_end_addr; | |
5bb9dbb5 | 442 | unsigned int irq; |
76c33d27 SH |
443 | dma_addr_t bd0_phys; |
444 | struct sdma_buffer_descriptor *bd0; | |
25aaa75d AAP |
445 | /* clock ratio for AHB:SDMA core. 1:1 is 1, 2:1 is 0*/ |
446 | bool clk_ratio; | |
17bba72f SH |
447 | }; |
448 | ||
107d0644 VK |
449 | static int sdma_config_write(struct dma_chan *chan, |
450 | struct dma_slave_config *dmaengine_cfg, | |
451 | enum dma_transfer_direction direction); | |
452 | ||
e9fd58de | 453 | static struct sdma_driver_data sdma_imx31 = { |
17bba72f SH |
454 | .chnenbl0 = SDMA_CHNENBL0_IMX31, |
455 | .num_events = 32, | |
456 | }; | |
457 | ||
dcfec3c0 SH |
458 | static struct sdma_script_start_addrs sdma_script_imx25 = { |
459 | .ap_2_ap_addr = 729, | |
460 | .uart_2_mcu_addr = 904, | |
461 | .per_2_app_addr = 1255, | |
462 | .mcu_2_app_addr = 834, | |
463 | .uartsh_2_mcu_addr = 1120, | |
464 | .per_2_shp_addr = 1329, | |
465 | .mcu_2_shp_addr = 1048, | |
466 | .ata_2_mcu_addr = 1560, | |
467 | .mcu_2_ata_addr = 1479, | |
468 | .app_2_per_addr = 1189, | |
469 | .app_2_mcu_addr = 770, | |
470 | .shp_2_per_addr = 1407, | |
471 | .shp_2_mcu_addr = 979, | |
472 | }; | |
473 | ||
e9fd58de | 474 | static struct sdma_driver_data sdma_imx25 = { |
dcfec3c0 SH |
475 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
476 | .num_events = 48, | |
477 | .script_addrs = &sdma_script_imx25, | |
478 | }; | |
479 | ||
e9fd58de | 480 | static struct sdma_driver_data sdma_imx35 = { |
17bba72f SH |
481 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
482 | .num_events = 48, | |
1ec1e82f SH |
483 | }; |
484 | ||
dcfec3c0 SH |
485 | static struct sdma_script_start_addrs sdma_script_imx51 = { |
486 | .ap_2_ap_addr = 642, | |
487 | .uart_2_mcu_addr = 817, | |
488 | .mcu_2_app_addr = 747, | |
489 | .mcu_2_shp_addr = 961, | |
490 | .ata_2_mcu_addr = 1473, | |
491 | .mcu_2_ata_addr = 1392, | |
492 | .app_2_per_addr = 1033, | |
493 | .app_2_mcu_addr = 683, | |
494 | .shp_2_per_addr = 1251, | |
495 | .shp_2_mcu_addr = 892, | |
496 | }; | |
497 | ||
e9fd58de | 498 | static struct sdma_driver_data sdma_imx51 = { |
dcfec3c0 SH |
499 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
500 | .num_events = 48, | |
501 | .script_addrs = &sdma_script_imx51, | |
502 | }; | |
503 | ||
504 | static struct sdma_script_start_addrs sdma_script_imx53 = { | |
505 | .ap_2_ap_addr = 642, | |
506 | .app_2_mcu_addr = 683, | |
507 | .mcu_2_app_addr = 747, | |
508 | .uart_2_mcu_addr = 817, | |
509 | .shp_2_mcu_addr = 891, | |
510 | .mcu_2_shp_addr = 960, | |
511 | .uartsh_2_mcu_addr = 1032, | |
512 | .spdif_2_mcu_addr = 1100, | |
513 | .mcu_2_spdif_addr = 1134, | |
514 | .firi_2_mcu_addr = 1193, | |
515 | .mcu_2_firi_addr = 1290, | |
516 | }; | |
517 | ||
e9fd58de | 518 | static struct sdma_driver_data sdma_imx53 = { |
dcfec3c0 SH |
519 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
520 | .num_events = 48, | |
521 | .script_addrs = &sdma_script_imx53, | |
522 | }; | |
523 | ||
524 | static struct sdma_script_start_addrs sdma_script_imx6q = { | |
525 | .ap_2_ap_addr = 642, | |
526 | .uart_2_mcu_addr = 817, | |
527 | .mcu_2_app_addr = 747, | |
528 | .per_2_per_addr = 6331, | |
529 | .uartsh_2_mcu_addr = 1032, | |
530 | .mcu_2_shp_addr = 960, | |
531 | .app_2_mcu_addr = 683, | |
532 | .shp_2_mcu_addr = 891, | |
533 | .spdif_2_mcu_addr = 1100, | |
534 | .mcu_2_spdif_addr = 1134, | |
535 | }; | |
536 | ||
e9fd58de | 537 | static struct sdma_driver_data sdma_imx6q = { |
dcfec3c0 SH |
538 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
539 | .num_events = 48, | |
540 | .script_addrs = &sdma_script_imx6q, | |
541 | }; | |
542 | ||
b7d2648a FE |
543 | static struct sdma_script_start_addrs sdma_script_imx7d = { |
544 | .ap_2_ap_addr = 644, | |
545 | .uart_2_mcu_addr = 819, | |
546 | .mcu_2_app_addr = 749, | |
547 | .uartsh_2_mcu_addr = 1034, | |
548 | .mcu_2_shp_addr = 962, | |
549 | .app_2_mcu_addr = 685, | |
550 | .shp_2_mcu_addr = 893, | |
551 | .spdif_2_mcu_addr = 1102, | |
552 | .mcu_2_spdif_addr = 1136, | |
553 | }; | |
554 | ||
555 | static struct sdma_driver_data sdma_imx7d = { | |
556 | .chnenbl0 = SDMA_CHNENBL0_IMX35, | |
557 | .num_events = 48, | |
558 | .script_addrs = &sdma_script_imx7d, | |
559 | }; | |
560 | ||
941acd56 AAP |
561 | static struct sdma_driver_data sdma_imx8mq = { |
562 | .chnenbl0 = SDMA_CHNENBL0_IMX35, | |
563 | .num_events = 48, | |
564 | .script_addrs = &sdma_script_imx7d, | |
565 | .check_ratio = 1, | |
566 | }; | |
567 | ||
afe7cded | 568 | static const struct platform_device_id sdma_devtypes[] = { |
62550cd7 | 569 | { |
dcfec3c0 SH |
570 | .name = "imx25-sdma", |
571 | .driver_data = (unsigned long)&sdma_imx25, | |
572 | }, { | |
62550cd7 | 573 | .name = "imx31-sdma", |
17bba72f | 574 | .driver_data = (unsigned long)&sdma_imx31, |
62550cd7 SG |
575 | }, { |
576 | .name = "imx35-sdma", | |
17bba72f | 577 | .driver_data = (unsigned long)&sdma_imx35, |
dcfec3c0 SH |
578 | }, { |
579 | .name = "imx51-sdma", | |
580 | .driver_data = (unsigned long)&sdma_imx51, | |
581 | }, { | |
582 | .name = "imx53-sdma", | |
583 | .driver_data = (unsigned long)&sdma_imx53, | |
584 | }, { | |
585 | .name = "imx6q-sdma", | |
586 | .driver_data = (unsigned long)&sdma_imx6q, | |
b7d2648a FE |
587 | }, { |
588 | .name = "imx7d-sdma", | |
589 | .driver_data = (unsigned long)&sdma_imx7d, | |
941acd56 AAP |
590 | }, { |
591 | .name = "imx8mq-sdma", | |
592 | .driver_data = (unsigned long)&sdma_imx8mq, | |
62550cd7 SG |
593 | }, { |
594 | /* sentinel */ | |
595 | } | |
596 | }; | |
597 | MODULE_DEVICE_TABLE(platform, sdma_devtypes); | |
598 | ||
580975d7 | 599 | static const struct of_device_id sdma_dt_ids[] = { |
dcfec3c0 SH |
600 | { .compatible = "fsl,imx6q-sdma", .data = &sdma_imx6q, }, |
601 | { .compatible = "fsl,imx53-sdma", .data = &sdma_imx53, }, | |
602 | { .compatible = "fsl,imx51-sdma", .data = &sdma_imx51, }, | |
17bba72f | 603 | { .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, }, |
dcfec3c0 | 604 | { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, }, |
63edea16 | 605 | { .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, }, |
b7d2648a | 606 | { .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, }, |
941acd56 | 607 | { .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, }, |
580975d7 SG |
608 | { /* sentinel */ } |
609 | }; | |
610 | MODULE_DEVICE_TABLE(of, sdma_dt_ids); | |
611 | ||
0bbc1413 RZ |
612 | #define SDMA_H_CONFIG_DSPDMA BIT(12) /* indicates if the DSPDMA is used */ |
613 | #define SDMA_H_CONFIG_RTD_PINS BIT(11) /* indicates if Real-Time Debug pins are enabled */ | |
614 | #define SDMA_H_CONFIG_ACR BIT(4) /* indicates if AHB freq /core freq = 2 or 1 */ | |
1ec1e82f SH |
615 | #define SDMA_H_CONFIG_CSM (3) /* indicates which context switch mode is selected*/ |
616 | ||
617 | static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event) | |
618 | { | |
17bba72f | 619 | u32 chnenbl0 = sdma->drvdata->chnenbl0; |
1ec1e82f SH |
620 | return chnenbl0 + event * 4; |
621 | } | |
622 | ||
623 | static int sdma_config_ownership(struct sdma_channel *sdmac, | |
624 | bool event_override, bool mcu_override, bool dsp_override) | |
625 | { | |
626 | struct sdma_engine *sdma = sdmac->sdma; | |
627 | int channel = sdmac->channel; | |
0bbc1413 | 628 | unsigned long evt, mcu, dsp; |
1ec1e82f SH |
629 | |
630 | if (event_override && mcu_override && dsp_override) | |
631 | return -EINVAL; | |
632 | ||
c4b56857 RZ |
633 | evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR); |
634 | mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR); | |
635 | dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
636 | |
637 | if (dsp_override) | |
0bbc1413 | 638 | __clear_bit(channel, &dsp); |
1ec1e82f | 639 | else |
0bbc1413 | 640 | __set_bit(channel, &dsp); |
1ec1e82f SH |
641 | |
642 | if (event_override) | |
0bbc1413 | 643 | __clear_bit(channel, &evt); |
1ec1e82f | 644 | else |
0bbc1413 | 645 | __set_bit(channel, &evt); |
1ec1e82f SH |
646 | |
647 | if (mcu_override) | |
0bbc1413 | 648 | __clear_bit(channel, &mcu); |
1ec1e82f | 649 | else |
0bbc1413 | 650 | __set_bit(channel, &mcu); |
1ec1e82f | 651 | |
c4b56857 RZ |
652 | writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR); |
653 | writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR); | |
654 | writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
655 | |
656 | return 0; | |
657 | } | |
658 | ||
b9a59166 RZ |
659 | static void sdma_enable_channel(struct sdma_engine *sdma, int channel) |
660 | { | |
0bbc1413 | 661 | writel(BIT(channel), sdma->regs + SDMA_H_START); |
b9a59166 RZ |
662 | } |
663 | ||
1ec1e82f | 664 | /* |
2ccaef05 | 665 | * sdma_run_channel0 - run a channel and wait till it's done |
1ec1e82f | 666 | */ |
2ccaef05 | 667 | static int sdma_run_channel0(struct sdma_engine *sdma) |
1ec1e82f | 668 | { |
1ec1e82f | 669 | int ret; |
1d069bfa | 670 | u32 reg; |
1ec1e82f | 671 | |
2ccaef05 | 672 | sdma_enable_channel(sdma, 0); |
1ec1e82f | 673 | |
1d069bfa MO |
674 | ret = readl_relaxed_poll_timeout_atomic(sdma->regs + SDMA_H_STATSTOP, |
675 | reg, !(reg & 1), 1, 500); | |
676 | if (ret) | |
2ccaef05 | 677 | dev_err(sdma->dev, "Timeout waiting for CH0 ready\n"); |
1ec1e82f | 678 | |
855832e4 | 679 | /* Set bits of CONFIG register with dynamic context switching */ |
25aaa75d AAP |
680 | reg = readl(sdma->regs + SDMA_H_CONFIG); |
681 | if ((reg & SDMA_H_CONFIG_CSM) == 0) { | |
682 | reg |= SDMA_H_CONFIG_CSM; | |
683 | writel_relaxed(reg, sdma->regs + SDMA_H_CONFIG); | |
684 | } | |
855832e4 | 685 | |
1d069bfa | 686 | return ret; |
1ec1e82f SH |
687 | } |
688 | ||
689 | static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size, | |
690 | u32 address) | |
691 | { | |
76c33d27 | 692 | struct sdma_buffer_descriptor *bd0 = sdma->bd0; |
1ec1e82f SH |
693 | void *buf_virt; |
694 | dma_addr_t buf_phys; | |
695 | int ret; | |
2ccaef05 | 696 | unsigned long flags; |
73eab978 | 697 | |
ceaf5226 | 698 | buf_virt = dma_alloc_coherent(sdma->dev, size, &buf_phys, GFP_KERNEL); |
73eab978 | 699 | if (!buf_virt) { |
2ccaef05 | 700 | return -ENOMEM; |
73eab978 | 701 | } |
1ec1e82f | 702 | |
2ccaef05 RZ |
703 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
704 | ||
1ec1e82f | 705 | bd0->mode.command = C0_SETPM; |
3f93a4f2 | 706 | bd0->mode.status = BD_DONE | BD_WRAP | BD_EXTD; |
1ec1e82f SH |
707 | bd0->mode.count = size / 2; |
708 | bd0->buffer_addr = buf_phys; | |
709 | bd0->ext_buffer_addr = address; | |
710 | ||
711 | memcpy(buf_virt, buf, size); | |
712 | ||
2ccaef05 | 713 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 714 | |
2ccaef05 | 715 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
1ec1e82f | 716 | |
ceaf5226 | 717 | dma_free_coherent(sdma->dev, size, buf_virt, buf_phys); |
73eab978 | 718 | |
1ec1e82f SH |
719 | return ret; |
720 | } | |
721 | ||
722 | static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event) | |
723 | { | |
724 | struct sdma_engine *sdma = sdmac->sdma; | |
725 | int channel = sdmac->channel; | |
0bbc1413 | 726 | unsigned long val; |
1ec1e82f SH |
727 | u32 chnenbl = chnenbl_ofs(sdma, event); |
728 | ||
c4b56857 | 729 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 730 | __set_bit(channel, &val); |
c4b56857 | 731 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
732 | } |
733 | ||
734 | static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event) | |
735 | { | |
736 | struct sdma_engine *sdma = sdmac->sdma; | |
737 | int channel = sdmac->channel; | |
738 | u32 chnenbl = chnenbl_ofs(sdma, event); | |
0bbc1413 | 739 | unsigned long val; |
1ec1e82f | 740 | |
c4b56857 | 741 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 742 | __clear_bit(channel, &val); |
c4b56857 | 743 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
744 | } |
745 | ||
57b772b8 RG |
746 | static struct sdma_desc *to_sdma_desc(struct dma_async_tx_descriptor *t) |
747 | { | |
748 | return container_of(t, struct sdma_desc, vd.tx); | |
749 | } | |
750 | ||
751 | static void sdma_start_desc(struct sdma_channel *sdmac) | |
752 | { | |
753 | struct virt_dma_desc *vd = vchan_next_desc(&sdmac->vc); | |
754 | struct sdma_desc *desc; | |
755 | struct sdma_engine *sdma = sdmac->sdma; | |
756 | int channel = sdmac->channel; | |
757 | ||
758 | if (!vd) { | |
759 | sdmac->desc = NULL; | |
760 | return; | |
761 | } | |
762 | sdmac->desc = desc = to_sdma_desc(&vd->tx); | |
763 | /* | |
764 | * Do not delete the node in desc_issued list in cyclic mode, otherwise | |
680302c4 | 765 | * the desc allocated will never be freed in vchan_dma_desc_free_list |
57b772b8 RG |
766 | */ |
767 | if (!(sdmac->flags & IMX_DMA_SG_LOOP)) | |
768 | list_del(&vd->node); | |
769 | ||
770 | sdma->channel_control[channel].base_bd_ptr = desc->bd_phys; | |
771 | sdma->channel_control[channel].current_bd_ptr = desc->bd_phys; | |
772 | sdma_enable_channel(sdma, sdmac->channel); | |
773 | } | |
774 | ||
d1a792f3 | 775 | static void sdma_update_channel_loop(struct sdma_channel *sdmac) |
1ec1e82f SH |
776 | { |
777 | struct sdma_buffer_descriptor *bd; | |
5881826d NH |
778 | int error = 0; |
779 | enum dma_status old_status = sdmac->status; | |
1ec1e82f SH |
780 | |
781 | /* | |
782 | * loop mode. Iterate over descriptors, re-setup them and | |
783 | * call callback function. | |
784 | */ | |
57b772b8 | 785 | while (sdmac->desc) { |
76c33d27 SH |
786 | struct sdma_desc *desc = sdmac->desc; |
787 | ||
788 | bd = &desc->bd[desc->buf_tail]; | |
1ec1e82f SH |
789 | |
790 | if (bd->mode.status & BD_DONE) | |
791 | break; | |
792 | ||
5881826d NH |
793 | if (bd->mode.status & BD_RROR) { |
794 | bd->mode.status &= ~BD_RROR; | |
1ec1e82f | 795 | sdmac->status = DMA_ERROR; |
5881826d NH |
796 | error = -EIO; |
797 | } | |
1ec1e82f | 798 | |
5881826d NH |
799 | /* |
800 | * We use bd->mode.count to calculate the residue, since contains | |
801 | * the number of bytes present in the current buffer descriptor. | |
802 | */ | |
803 | ||
76c33d27 | 804 | desc->chn_real_count = bd->mode.count; |
1ec1e82f | 805 | bd->mode.status |= BD_DONE; |
76c33d27 SH |
806 | bd->mode.count = desc->period_len; |
807 | desc->buf_ptail = desc->buf_tail; | |
808 | desc->buf_tail = (desc->buf_tail + 1) % desc->num_bd; | |
15f30f51 NH |
809 | |
810 | /* | |
811 | * The callback is called from the interrupt context in order | |
812 | * to reduce latency and to avoid the risk of altering the | |
813 | * SDMA transaction status by the time the client tasklet is | |
814 | * executed. | |
815 | */ | |
57b772b8 RG |
816 | spin_unlock(&sdmac->vc.lock); |
817 | dmaengine_desc_get_callback_invoke(&desc->vd.tx, NULL); | |
818 | spin_lock(&sdmac->vc.lock); | |
15f30f51 | 819 | |
5881826d NH |
820 | if (error) |
821 | sdmac->status = old_status; | |
1ec1e82f SH |
822 | } |
823 | } | |
824 | ||
57b772b8 | 825 | static void mxc_sdma_handle_channel_normal(struct sdma_channel *data) |
1ec1e82f | 826 | { |
15f30f51 | 827 | struct sdma_channel *sdmac = (struct sdma_channel *) data; |
1ec1e82f SH |
828 | struct sdma_buffer_descriptor *bd; |
829 | int i, error = 0; | |
830 | ||
76c33d27 | 831 | sdmac->desc->chn_real_count = 0; |
1ec1e82f SH |
832 | /* |
833 | * non loop mode. Iterate over all descriptors, collect | |
834 | * errors and call callback function | |
835 | */ | |
76c33d27 SH |
836 | for (i = 0; i < sdmac->desc->num_bd; i++) { |
837 | bd = &sdmac->desc->bd[i]; | |
1ec1e82f SH |
838 | |
839 | if (bd->mode.status & (BD_DONE | BD_RROR)) | |
840 | error = -EIO; | |
76c33d27 | 841 | sdmac->desc->chn_real_count += bd->mode.count; |
1ec1e82f SH |
842 | } |
843 | ||
844 | if (error) | |
845 | sdmac->status = DMA_ERROR; | |
846 | else | |
409bff6a | 847 | sdmac->status = DMA_COMPLETE; |
1ec1e82f SH |
848 | } |
849 | ||
1ec1e82f SH |
850 | static irqreturn_t sdma_int_handler(int irq, void *dev_id) |
851 | { | |
852 | struct sdma_engine *sdma = dev_id; | |
0bbc1413 | 853 | unsigned long stat; |
1ec1e82f | 854 | |
c4b56857 RZ |
855 | stat = readl_relaxed(sdma->regs + SDMA_H_INTR); |
856 | writel_relaxed(stat, sdma->regs + SDMA_H_INTR); | |
1d069bfa MO |
857 | /* channel 0 is special and not handled here, see run_channel0() */ |
858 | stat &= ~1; | |
1ec1e82f SH |
859 | |
860 | while (stat) { | |
861 | int channel = fls(stat) - 1; | |
862 | struct sdma_channel *sdmac = &sdma->channel[channel]; | |
57b772b8 RG |
863 | struct sdma_desc *desc; |
864 | ||
865 | spin_lock(&sdmac->vc.lock); | |
866 | desc = sdmac->desc; | |
867 | if (desc) { | |
868 | if (sdmac->flags & IMX_DMA_SG_LOOP) { | |
869 | sdma_update_channel_loop(sdmac); | |
870 | } else { | |
871 | mxc_sdma_handle_channel_normal(sdmac); | |
872 | vchan_cookie_complete(&desc->vd); | |
873 | sdma_start_desc(sdmac); | |
874 | } | |
875 | } | |
1ec1e82f | 876 | |
57b772b8 | 877 | spin_unlock(&sdmac->vc.lock); |
0bbc1413 | 878 | __clear_bit(channel, &stat); |
1ec1e82f SH |
879 | } |
880 | ||
881 | return IRQ_HANDLED; | |
882 | } | |
883 | ||
884 | /* | |
885 | * sets the pc of SDMA script according to the peripheral type | |
886 | */ | |
887 | static void sdma_get_pc(struct sdma_channel *sdmac, | |
888 | enum sdma_peripheral_type peripheral_type) | |
889 | { | |
890 | struct sdma_engine *sdma = sdmac->sdma; | |
891 | int per_2_emi = 0, emi_2_per = 0; | |
892 | /* | |
893 | * These are needed once we start to support transfers between | |
894 | * two peripherals or memory-to-memory transfers | |
895 | */ | |
0f06c027 | 896 | int per_2_per = 0, emi_2_emi = 0; |
1ec1e82f SH |
897 | |
898 | sdmac->pc_from_device = 0; | |
899 | sdmac->pc_to_device = 0; | |
8391ecf4 | 900 | sdmac->device_to_device = 0; |
0f06c027 | 901 | sdmac->pc_to_pc = 0; |
1ec1e82f SH |
902 | |
903 | switch (peripheral_type) { | |
904 | case IMX_DMATYPE_MEMORY: | |
0f06c027 | 905 | emi_2_emi = sdma->script_addrs->ap_2_ap_addr; |
1ec1e82f SH |
906 | break; |
907 | case IMX_DMATYPE_DSP: | |
908 | emi_2_per = sdma->script_addrs->bp_2_ap_addr; | |
909 | per_2_emi = sdma->script_addrs->ap_2_bp_addr; | |
910 | break; | |
911 | case IMX_DMATYPE_FIRI: | |
912 | per_2_emi = sdma->script_addrs->firi_2_mcu_addr; | |
913 | emi_2_per = sdma->script_addrs->mcu_2_firi_addr; | |
914 | break; | |
915 | case IMX_DMATYPE_UART: | |
916 | per_2_emi = sdma->script_addrs->uart_2_mcu_addr; | |
917 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
918 | break; | |
919 | case IMX_DMATYPE_UART_SP: | |
920 | per_2_emi = sdma->script_addrs->uartsh_2_mcu_addr; | |
921 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
922 | break; | |
923 | case IMX_DMATYPE_ATA: | |
924 | per_2_emi = sdma->script_addrs->ata_2_mcu_addr; | |
925 | emi_2_per = sdma->script_addrs->mcu_2_ata_addr; | |
926 | break; | |
927 | case IMX_DMATYPE_CSPI: | |
928 | case IMX_DMATYPE_EXT: | |
929 | case IMX_DMATYPE_SSI: | |
29aebfde | 930 | case IMX_DMATYPE_SAI: |
1ec1e82f SH |
931 | per_2_emi = sdma->script_addrs->app_2_mcu_addr; |
932 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
933 | break; | |
1a895578 NC |
934 | case IMX_DMATYPE_SSI_DUAL: |
935 | per_2_emi = sdma->script_addrs->ssish_2_mcu_addr; | |
936 | emi_2_per = sdma->script_addrs->mcu_2_ssish_addr; | |
937 | break; | |
1ec1e82f SH |
938 | case IMX_DMATYPE_SSI_SP: |
939 | case IMX_DMATYPE_MMC: | |
940 | case IMX_DMATYPE_SDHC: | |
941 | case IMX_DMATYPE_CSPI_SP: | |
942 | case IMX_DMATYPE_ESAI: | |
943 | case IMX_DMATYPE_MSHC_SP: | |
944 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
945 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
946 | break; | |
947 | case IMX_DMATYPE_ASRC: | |
948 | per_2_emi = sdma->script_addrs->asrc_2_mcu_addr; | |
949 | emi_2_per = sdma->script_addrs->asrc_2_mcu_addr; | |
950 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
951 | break; | |
f892afb0 NC |
952 | case IMX_DMATYPE_ASRC_SP: |
953 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
954 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
955 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
956 | break; | |
1ec1e82f SH |
957 | case IMX_DMATYPE_MSHC: |
958 | per_2_emi = sdma->script_addrs->mshc_2_mcu_addr; | |
959 | emi_2_per = sdma->script_addrs->mcu_2_mshc_addr; | |
960 | break; | |
961 | case IMX_DMATYPE_CCM: | |
962 | per_2_emi = sdma->script_addrs->dptc_dvfs_addr; | |
963 | break; | |
964 | case IMX_DMATYPE_SPDIF: | |
965 | per_2_emi = sdma->script_addrs->spdif_2_mcu_addr; | |
966 | emi_2_per = sdma->script_addrs->mcu_2_spdif_addr; | |
967 | break; | |
968 | case IMX_DMATYPE_IPU_MEMORY: | |
969 | emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr; | |
970 | break; | |
971 | default: | |
972 | break; | |
973 | } | |
974 | ||
975 | sdmac->pc_from_device = per_2_emi; | |
976 | sdmac->pc_to_device = emi_2_per; | |
8391ecf4 | 977 | sdmac->device_to_device = per_2_per; |
0f06c027 | 978 | sdmac->pc_to_pc = emi_2_emi; |
1ec1e82f SH |
979 | } |
980 | ||
981 | static int sdma_load_context(struct sdma_channel *sdmac) | |
982 | { | |
983 | struct sdma_engine *sdma = sdmac->sdma; | |
984 | int channel = sdmac->channel; | |
985 | int load_address; | |
986 | struct sdma_context_data *context = sdma->context; | |
76c33d27 | 987 | struct sdma_buffer_descriptor *bd0 = sdma->bd0; |
1ec1e82f | 988 | int ret; |
2ccaef05 | 989 | unsigned long flags; |
1ec1e82f | 990 | |
ad0d92d7 RG |
991 | if (sdmac->context_loaded) |
992 | return 0; | |
993 | ||
8391ecf4 | 994 | if (sdmac->direction == DMA_DEV_TO_MEM) |
1ec1e82f | 995 | load_address = sdmac->pc_from_device; |
8391ecf4 SW |
996 | else if (sdmac->direction == DMA_DEV_TO_DEV) |
997 | load_address = sdmac->device_to_device; | |
0f06c027 RG |
998 | else if (sdmac->direction == DMA_MEM_TO_MEM) |
999 | load_address = sdmac->pc_to_pc; | |
8391ecf4 | 1000 | else |
1ec1e82f | 1001 | load_address = sdmac->pc_to_device; |
1ec1e82f SH |
1002 | |
1003 | if (load_address < 0) | |
1004 | return load_address; | |
1005 | ||
1006 | dev_dbg(sdma->dev, "load_address = %d\n", load_address); | |
0bbc1413 | 1007 | dev_dbg(sdma->dev, "wml = 0x%08x\n", (u32)sdmac->watermark_level); |
1ec1e82f SH |
1008 | dev_dbg(sdma->dev, "shp_addr = 0x%08x\n", sdmac->shp_addr); |
1009 | dev_dbg(sdma->dev, "per_addr = 0x%08x\n", sdmac->per_addr); | |
0bbc1413 RZ |
1010 | dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", (u32)sdmac->event_mask[0]); |
1011 | dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", (u32)sdmac->event_mask[1]); | |
1ec1e82f | 1012 | |
2ccaef05 | 1013 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
73eab978 | 1014 | |
1ec1e82f SH |
1015 | memset(context, 0, sizeof(*context)); |
1016 | context->channel_state.pc = load_address; | |
1017 | ||
1018 | /* Send by context the event mask,base address for peripheral | |
1019 | * and watermark level | |
1020 | */ | |
0bbc1413 RZ |
1021 | context->gReg[0] = sdmac->event_mask[1]; |
1022 | context->gReg[1] = sdmac->event_mask[0]; | |
1ec1e82f SH |
1023 | context->gReg[2] = sdmac->per_addr; |
1024 | context->gReg[6] = sdmac->shp_addr; | |
1025 | context->gReg[7] = sdmac->watermark_level; | |
1026 | ||
1027 | bd0->mode.command = C0_SETDM; | |
3f93a4f2 | 1028 | bd0->mode.status = BD_DONE | BD_WRAP | BD_EXTD; |
1ec1e82f SH |
1029 | bd0->mode.count = sizeof(*context) / 4; |
1030 | bd0->buffer_addr = sdma->context_phys; | |
1031 | bd0->ext_buffer_addr = 2048 + (sizeof(*context) / 4) * channel; | |
2ccaef05 | 1032 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 1033 | |
2ccaef05 | 1034 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
73eab978 | 1035 | |
ad0d92d7 RG |
1036 | sdmac->context_loaded = true; |
1037 | ||
1ec1e82f SH |
1038 | return ret; |
1039 | } | |
1040 | ||
7b350ab0 MR |
1041 | static struct sdma_channel *to_sdma_chan(struct dma_chan *chan) |
1042 | { | |
57b772b8 | 1043 | return container_of(chan, struct sdma_channel, vc.chan); |
7b350ab0 MR |
1044 | } |
1045 | ||
1046 | static int sdma_disable_channel(struct dma_chan *chan) | |
1ec1e82f | 1047 | { |
7b350ab0 | 1048 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1ec1e82f SH |
1049 | struct sdma_engine *sdma = sdmac->sdma; |
1050 | int channel = sdmac->channel; | |
1051 | ||
0bbc1413 | 1052 | writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP); |
1ec1e82f | 1053 | sdmac->status = DMA_ERROR; |
7b350ab0 MR |
1054 | |
1055 | return 0; | |
1ec1e82f | 1056 | } |
b8603d2a | 1057 | static void sdma_channel_terminate_work(struct work_struct *work) |
7f3ff14b | 1058 | { |
b8603d2a LS |
1059 | struct sdma_channel *sdmac = container_of(work, struct sdma_channel, |
1060 | terminate_worker); | |
57b772b8 RG |
1061 | unsigned long flags; |
1062 | LIST_HEAD(head); | |
1063 | ||
7f3ff14b JW |
1064 | /* |
1065 | * According to NXP R&D team a delay of one BD SDMA cost time | |
1066 | * (maximum is 1ms) should be added after disable of the channel | |
1067 | * bit, to ensure SDMA core has really been stopped after SDMA | |
1068 | * clients call .device_terminate_all. | |
1069 | */ | |
b8603d2a LS |
1070 | usleep_range(1000, 2000); |
1071 | ||
1072 | spin_lock_irqsave(&sdmac->vc.lock, flags); | |
1073 | vchan_get_all_descriptors(&sdmac->vc, &head); | |
1074 | sdmac->desc = NULL; | |
1075 | spin_unlock_irqrestore(&sdmac->vc.lock, flags); | |
1076 | vchan_dma_desc_free_list(&sdmac->vc, &head); | |
ad0d92d7 | 1077 | sdmac->context_loaded = false; |
b8603d2a LS |
1078 | } |
1079 | ||
1080 | static int sdma_disable_channel_async(struct dma_chan *chan) | |
1081 | { | |
1082 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1083 | ||
1084 | sdma_disable_channel(chan); | |
1085 | ||
1086 | if (sdmac->desc) | |
1087 | schedule_work(&sdmac->terminate_worker); | |
7f3ff14b JW |
1088 | |
1089 | return 0; | |
1090 | } | |
1091 | ||
b8603d2a LS |
1092 | static void sdma_channel_synchronize(struct dma_chan *chan) |
1093 | { | |
1094 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1095 | ||
1096 | vchan_synchronize(&sdmac->vc); | |
1097 | ||
1098 | flush_work(&sdmac->terminate_worker); | |
1099 | } | |
1100 | ||
8391ecf4 SW |
1101 | static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac) |
1102 | { | |
1103 | struct sdma_engine *sdma = sdmac->sdma; | |
1104 | ||
1105 | int lwml = sdmac->watermark_level & SDMA_WATERMARK_LEVEL_LWML; | |
1106 | int hwml = (sdmac->watermark_level & SDMA_WATERMARK_LEVEL_HWML) >> 16; | |
1107 | ||
1108 | set_bit(sdmac->event_id0 % 32, &sdmac->event_mask[1]); | |
1109 | set_bit(sdmac->event_id1 % 32, &sdmac->event_mask[0]); | |
1110 | ||
1111 | if (sdmac->event_id0 > 31) | |
1112 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_LWE; | |
1113 | ||
1114 | if (sdmac->event_id1 > 31) | |
1115 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_HWE; | |
1116 | ||
1117 | /* | |
1118 | * If LWML(src_maxburst) > HWML(dst_maxburst), we need | |
1119 | * swap LWML and HWML of INFO(A.3.2.5.1), also need swap | |
1120 | * r0(event_mask[1]) and r1(event_mask[0]). | |
1121 | */ | |
1122 | if (lwml > hwml) { | |
1123 | sdmac->watermark_level &= ~(SDMA_WATERMARK_LEVEL_LWML | | |
1124 | SDMA_WATERMARK_LEVEL_HWML); | |
1125 | sdmac->watermark_level |= hwml; | |
1126 | sdmac->watermark_level |= lwml << 16; | |
1127 | swap(sdmac->event_mask[0], sdmac->event_mask[1]); | |
1128 | } | |
1129 | ||
1130 | if (sdmac->per_address2 >= sdma->spba_start_addr && | |
1131 | sdmac->per_address2 <= sdma->spba_end_addr) | |
1132 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SP; | |
1133 | ||
1134 | if (sdmac->per_address >= sdma->spba_start_addr && | |
1135 | sdmac->per_address <= sdma->spba_end_addr) | |
1136 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_DP; | |
1137 | ||
1138 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_CONT; | |
1139 | } | |
1140 | ||
7b350ab0 | 1141 | static int sdma_config_channel(struct dma_chan *chan) |
1ec1e82f | 1142 | { |
7b350ab0 | 1143 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1ec1e82f SH |
1144 | int ret; |
1145 | ||
7b350ab0 | 1146 | sdma_disable_channel(chan); |
1ec1e82f | 1147 | |
0bbc1413 RZ |
1148 | sdmac->event_mask[0] = 0; |
1149 | sdmac->event_mask[1] = 0; | |
1ec1e82f SH |
1150 | sdmac->shp_addr = 0; |
1151 | sdmac->per_addr = 0; | |
1152 | ||
1ec1e82f SH |
1153 | switch (sdmac->peripheral_type) { |
1154 | case IMX_DMATYPE_DSP: | |
1155 | sdma_config_ownership(sdmac, false, true, true); | |
1156 | break; | |
1157 | case IMX_DMATYPE_MEMORY: | |
1158 | sdma_config_ownership(sdmac, false, true, false); | |
1159 | break; | |
1160 | default: | |
1161 | sdma_config_ownership(sdmac, true, true, false); | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | sdma_get_pc(sdmac, sdmac->peripheral_type); | |
1166 | ||
1167 | if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) && | |
1168 | (sdmac->peripheral_type != IMX_DMATYPE_DSP)) { | |
1169 | /* Handle multiple event channels differently */ | |
1170 | if (sdmac->event_id1) { | |
8391ecf4 SW |
1171 | if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP || |
1172 | sdmac->peripheral_type == IMX_DMATYPE_ASRC) | |
1173 | sdma_set_watermarklevel_for_p2p(sdmac); | |
1174 | } else | |
0bbc1413 | 1175 | __set_bit(sdmac->event_id0, sdmac->event_mask); |
8391ecf4 | 1176 | |
1ec1e82f SH |
1177 | /* Address */ |
1178 | sdmac->shp_addr = sdmac->per_address; | |
8391ecf4 | 1179 | sdmac->per_addr = sdmac->per_address2; |
1ec1e82f SH |
1180 | } else { |
1181 | sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */ | |
1182 | } | |
1183 | ||
1184 | ret = sdma_load_context(sdmac); | |
1185 | ||
1186 | return ret; | |
1187 | } | |
1188 | ||
1189 | static int sdma_set_channel_priority(struct sdma_channel *sdmac, | |
1190 | unsigned int priority) | |
1191 | { | |
1192 | struct sdma_engine *sdma = sdmac->sdma; | |
1193 | int channel = sdmac->channel; | |
1194 | ||
1195 | if (priority < MXC_SDMA_MIN_PRIORITY | |
1196 | || priority > MXC_SDMA_MAX_PRIORITY) { | |
1197 | return -EINVAL; | |
1198 | } | |
1199 | ||
c4b56857 | 1200 | writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel); |
1ec1e82f SH |
1201 | |
1202 | return 0; | |
1203 | } | |
1204 | ||
57b772b8 | 1205 | static int sdma_request_channel0(struct sdma_engine *sdma) |
1ec1e82f | 1206 | { |
1ec1e82f SH |
1207 | int ret = -EBUSY; |
1208 | ||
31ef489a | 1209 | sdma->bd0 = dma_alloc_coherent(sdma->dev, PAGE_SIZE, &sdma->bd0_phys, |
57b772b8 RG |
1210 | GFP_NOWAIT); |
1211 | if (!sdma->bd0) { | |
1ec1e82f SH |
1212 | ret = -ENOMEM; |
1213 | goto out; | |
1214 | } | |
1215 | ||
57b772b8 RG |
1216 | sdma->channel_control[0].base_bd_ptr = sdma->bd0_phys; |
1217 | sdma->channel_control[0].current_bd_ptr = sdma->bd0_phys; | |
1ec1e82f | 1218 | |
57b772b8 | 1219 | sdma_set_channel_priority(&sdma->channel[0], MXC_SDMA_DEFAULT_PRIORITY); |
1ec1e82f SH |
1220 | return 0; |
1221 | out: | |
1222 | ||
1223 | return ret; | |
1224 | } | |
1225 | ||
57b772b8 RG |
1226 | |
1227 | static int sdma_alloc_bd(struct sdma_desc *desc) | |
1ec1e82f | 1228 | { |
ebb853b1 | 1229 | u32 bd_size = desc->num_bd * sizeof(struct sdma_buffer_descriptor); |
57b772b8 | 1230 | int ret = 0; |
1ec1e82f | 1231 | |
31ef489a | 1232 | desc->bd = dma_alloc_coherent(desc->sdmac->sdma->dev, bd_size, |
ceaf5226 | 1233 | &desc->bd_phys, GFP_NOWAIT); |
57b772b8 RG |
1234 | if (!desc->bd) { |
1235 | ret = -ENOMEM; | |
1236 | goto out; | |
1237 | } | |
1238 | out: | |
1239 | return ret; | |
1240 | } | |
1ec1e82f | 1241 | |
57b772b8 RG |
1242 | static void sdma_free_bd(struct sdma_desc *desc) |
1243 | { | |
ebb853b1 LS |
1244 | u32 bd_size = desc->num_bd * sizeof(struct sdma_buffer_descriptor); |
1245 | ||
ceaf5226 AD |
1246 | dma_free_coherent(desc->sdmac->sdma->dev, bd_size, desc->bd, |
1247 | desc->bd_phys); | |
57b772b8 | 1248 | } |
1ec1e82f | 1249 | |
57b772b8 RG |
1250 | static void sdma_desc_free(struct virt_dma_desc *vd) |
1251 | { | |
1252 | struct sdma_desc *desc = container_of(vd, struct sdma_desc, vd); | |
1253 | ||
1254 | sdma_free_bd(desc); | |
1255 | kfree(desc); | |
1ec1e82f SH |
1256 | } |
1257 | ||
1258 | static int sdma_alloc_chan_resources(struct dma_chan *chan) | |
1259 | { | |
1260 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1261 | struct imx_dma_data *data = chan->private; | |
0f06c027 | 1262 | struct imx_dma_data mem_data; |
1ec1e82f SH |
1263 | int prio, ret; |
1264 | ||
0f06c027 RG |
1265 | /* |
1266 | * MEMCPY may never setup chan->private by filter function such as | |
1267 | * dmatest, thus create 'struct imx_dma_data mem_data' for this case. | |
1268 | * Please note in any other slave case, you have to setup chan->private | |
1269 | * with 'struct imx_dma_data' in your own filter function if you want to | |
1270 | * request dma channel by dma_request_channel() rather than | |
1271 | * dma_request_slave_channel(). Othwise, 'MEMCPY in case?' will appear | |
1272 | * to warn you to correct your filter function. | |
1273 | */ | |
1274 | if (!data) { | |
1275 | dev_dbg(sdmac->sdma->dev, "MEMCPY in case?\n"); | |
1276 | mem_data.priority = 2; | |
1277 | mem_data.peripheral_type = IMX_DMATYPE_MEMORY; | |
1278 | mem_data.dma_request = 0; | |
1279 | mem_data.dma_request2 = 0; | |
1280 | data = &mem_data; | |
1281 | ||
1282 | sdma_get_pc(sdmac, IMX_DMATYPE_MEMORY); | |
1283 | } | |
1ec1e82f SH |
1284 | |
1285 | switch (data->priority) { | |
1286 | case DMA_PRIO_HIGH: | |
1287 | prio = 3; | |
1288 | break; | |
1289 | case DMA_PRIO_MEDIUM: | |
1290 | prio = 2; | |
1291 | break; | |
1292 | case DMA_PRIO_LOW: | |
1293 | default: | |
1294 | prio = 1; | |
1295 | break; | |
1296 | } | |
1297 | ||
1298 | sdmac->peripheral_type = data->peripheral_type; | |
1299 | sdmac->event_id0 = data->dma_request; | |
8391ecf4 | 1300 | sdmac->event_id1 = data->dma_request2; |
c2c744d3 | 1301 | |
b93edcdd FE |
1302 | ret = clk_enable(sdmac->sdma->clk_ipg); |
1303 | if (ret) | |
1304 | return ret; | |
1305 | ret = clk_enable(sdmac->sdma->clk_ahb); | |
1306 | if (ret) | |
1307 | goto disable_clk_ipg; | |
c2c744d3 | 1308 | |
3bb5e7ca | 1309 | ret = sdma_set_channel_priority(sdmac, prio); |
1ec1e82f | 1310 | if (ret) |
b93edcdd | 1311 | goto disable_clk_ahb; |
1ec1e82f | 1312 | |
1ec1e82f | 1313 | return 0; |
b93edcdd FE |
1314 | |
1315 | disable_clk_ahb: | |
1316 | clk_disable(sdmac->sdma->clk_ahb); | |
1317 | disable_clk_ipg: | |
1318 | clk_disable(sdmac->sdma->clk_ipg); | |
1319 | return ret; | |
1ec1e82f SH |
1320 | } |
1321 | ||
1322 | static void sdma_free_chan_resources(struct dma_chan *chan) | |
1323 | { | |
1324 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1325 | struct sdma_engine *sdma = sdmac->sdma; | |
1326 | ||
b8603d2a LS |
1327 | sdma_disable_channel_async(chan); |
1328 | ||
1329 | sdma_channel_synchronize(chan); | |
1ec1e82f SH |
1330 | |
1331 | if (sdmac->event_id0) | |
1332 | sdma_event_disable(sdmac, sdmac->event_id0); | |
1333 | if (sdmac->event_id1) | |
1334 | sdma_event_disable(sdmac, sdmac->event_id1); | |
1335 | ||
1336 | sdmac->event_id0 = 0; | |
1337 | sdmac->event_id1 = 0; | |
1338 | ||
1339 | sdma_set_channel_priority(sdmac, 0); | |
1340 | ||
7560e3f3 SH |
1341 | clk_disable(sdma->clk_ipg); |
1342 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1343 | } |
1344 | ||
21420841 RG |
1345 | static struct sdma_desc *sdma_transfer_init(struct sdma_channel *sdmac, |
1346 | enum dma_transfer_direction direction, u32 bds) | |
1347 | { | |
1348 | struct sdma_desc *desc; | |
1349 | ||
1350 | desc = kzalloc((sizeof(*desc)), GFP_NOWAIT); | |
1351 | if (!desc) | |
1352 | goto err_out; | |
1353 | ||
1354 | sdmac->status = DMA_IN_PROGRESS; | |
1355 | sdmac->direction = direction; | |
1356 | sdmac->flags = 0; | |
1357 | ||
1358 | desc->chn_count = 0; | |
1359 | desc->chn_real_count = 0; | |
1360 | desc->buf_tail = 0; | |
1361 | desc->buf_ptail = 0; | |
1362 | desc->sdmac = sdmac; | |
1363 | desc->num_bd = bds; | |
1364 | ||
1365 | if (sdma_alloc_bd(desc)) | |
1366 | goto err_desc_out; | |
1367 | ||
0f06c027 RG |
1368 | /* No slave_config called in MEMCPY case, so do here */ |
1369 | if (direction == DMA_MEM_TO_MEM) | |
1370 | sdma_config_ownership(sdmac, false, true, false); | |
1371 | ||
21420841 RG |
1372 | if (sdma_load_context(sdmac)) |
1373 | goto err_desc_out; | |
1374 | ||
1375 | return desc; | |
1376 | ||
1377 | err_desc_out: | |
1378 | kfree(desc); | |
1379 | err_out: | |
1380 | return NULL; | |
1381 | } | |
1382 | ||
0f06c027 RG |
1383 | static struct dma_async_tx_descriptor *sdma_prep_memcpy( |
1384 | struct dma_chan *chan, dma_addr_t dma_dst, | |
1385 | dma_addr_t dma_src, size_t len, unsigned long flags) | |
1386 | { | |
1387 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1388 | struct sdma_engine *sdma = sdmac->sdma; | |
1389 | int channel = sdmac->channel; | |
1390 | size_t count; | |
1391 | int i = 0, param; | |
1392 | struct sdma_buffer_descriptor *bd; | |
1393 | struct sdma_desc *desc; | |
1394 | ||
1395 | if (!chan || !len) | |
1396 | return NULL; | |
1397 | ||
1398 | dev_dbg(sdma->dev, "memcpy: %pad->%pad, len=%zu, channel=%d.\n", | |
1399 | &dma_src, &dma_dst, len, channel); | |
1400 | ||
1401 | desc = sdma_transfer_init(sdmac, DMA_MEM_TO_MEM, | |
1402 | len / SDMA_BD_MAX_CNT + 1); | |
1403 | if (!desc) | |
1404 | return NULL; | |
1405 | ||
1406 | do { | |
1407 | count = min_t(size_t, len, SDMA_BD_MAX_CNT); | |
1408 | bd = &desc->bd[i]; | |
1409 | bd->buffer_addr = dma_src; | |
1410 | bd->ext_buffer_addr = dma_dst; | |
1411 | bd->mode.count = count; | |
1412 | desc->chn_count += count; | |
1413 | bd->mode.command = 0; | |
1414 | ||
1415 | dma_src += count; | |
1416 | dma_dst += count; | |
1417 | len -= count; | |
1418 | i++; | |
1419 | ||
1420 | param = BD_DONE | BD_EXTD | BD_CONT; | |
1421 | /* last bd */ | |
1422 | if (!len) { | |
1423 | param |= BD_INTR; | |
1424 | param |= BD_LAST; | |
1425 | param &= ~BD_CONT; | |
1426 | } | |
1427 | ||
1428 | dev_dbg(sdma->dev, "entry %d: count: %zd dma: 0x%x %s%s\n", | |
1429 | i, count, bd->buffer_addr, | |
1430 | param & BD_WRAP ? "wrap" : "", | |
1431 | param & BD_INTR ? " intr" : ""); | |
1432 | ||
1433 | bd->mode.status = param; | |
1434 | } while (len); | |
1435 | ||
1436 | return vchan_tx_prep(&sdmac->vc, &desc->vd, flags); | |
1437 | } | |
1438 | ||
1ec1e82f SH |
1439 | static struct dma_async_tx_descriptor *sdma_prep_slave_sg( |
1440 | struct dma_chan *chan, struct scatterlist *sgl, | |
db8196df | 1441 | unsigned int sg_len, enum dma_transfer_direction direction, |
185ecb5f | 1442 | unsigned long flags, void *context) |
1ec1e82f SH |
1443 | { |
1444 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1445 | struct sdma_engine *sdma = sdmac->sdma; | |
ad78b000 | 1446 | int i, count; |
23889c63 | 1447 | int channel = sdmac->channel; |
1ec1e82f | 1448 | struct scatterlist *sg; |
57b772b8 | 1449 | struct sdma_desc *desc; |
1ec1e82f | 1450 | |
107d0644 VK |
1451 | sdma_config_write(chan, &sdmac->slave_config, direction); |
1452 | ||
21420841 | 1453 | desc = sdma_transfer_init(sdmac, direction, sg_len); |
57b772b8 RG |
1454 | if (!desc) |
1455 | goto err_out; | |
1456 | ||
1ec1e82f SH |
1457 | dev_dbg(sdma->dev, "setting up %d entries for channel %d.\n", |
1458 | sg_len, channel); | |
1459 | ||
1ec1e82f | 1460 | for_each_sg(sgl, sg, sg_len, i) { |
76c33d27 | 1461 | struct sdma_buffer_descriptor *bd = &desc->bd[i]; |
1ec1e82f SH |
1462 | int param; |
1463 | ||
d2f5c276 | 1464 | bd->buffer_addr = sg->dma_address; |
1ec1e82f | 1465 | |
fdaf9c4b | 1466 | count = sg_dma_len(sg); |
1ec1e82f | 1467 | |
4a6b2e8a | 1468 | if (count > SDMA_BD_MAX_CNT) { |
1ec1e82f | 1469 | dev_err(sdma->dev, "SDMA channel %d: maximum bytes for sg entry exceeded: %d > %d\n", |
4a6b2e8a | 1470 | channel, count, SDMA_BD_MAX_CNT); |
57b772b8 | 1471 | goto err_bd_out; |
1ec1e82f SH |
1472 | } |
1473 | ||
1474 | bd->mode.count = count; | |
76c33d27 | 1475 | desc->chn_count += count; |
1ec1e82f | 1476 | |
ad78b000 | 1477 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) |
57b772b8 | 1478 | goto err_bd_out; |
1fa81c27 SH |
1479 | |
1480 | switch (sdmac->word_size) { | |
1481 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
1ec1e82f | 1482 | bd->mode.command = 0; |
1fa81c27 | 1483 | if (count & 3 || sg->dma_address & 3) |
57b772b8 | 1484 | goto err_bd_out; |
1fa81c27 SH |
1485 | break; |
1486 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
1487 | bd->mode.command = 2; | |
1488 | if (count & 1 || sg->dma_address & 1) | |
57b772b8 | 1489 | goto err_bd_out; |
1fa81c27 SH |
1490 | break; |
1491 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
1492 | bd->mode.command = 1; | |
1493 | break; | |
1494 | default: | |
57b772b8 | 1495 | goto err_bd_out; |
1fa81c27 | 1496 | } |
1ec1e82f SH |
1497 | |
1498 | param = BD_DONE | BD_EXTD | BD_CONT; | |
1499 | ||
341b9419 | 1500 | if (i + 1 == sg_len) { |
1ec1e82f | 1501 | param |= BD_INTR; |
341b9419 SG |
1502 | param |= BD_LAST; |
1503 | param &= ~BD_CONT; | |
1ec1e82f SH |
1504 | } |
1505 | ||
c3cc74b2 OJ |
1506 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1507 | i, count, (u64)sg->dma_address, | |
1ec1e82f SH |
1508 | param & BD_WRAP ? "wrap" : "", |
1509 | param & BD_INTR ? " intr" : ""); | |
1510 | ||
1511 | bd->mode.status = param; | |
1512 | } | |
1513 | ||
57b772b8 RG |
1514 | return vchan_tx_prep(&sdmac->vc, &desc->vd, flags); |
1515 | err_bd_out: | |
1516 | sdma_free_bd(desc); | |
1517 | kfree(desc); | |
1ec1e82f | 1518 | err_out: |
4b2ce9dd | 1519 | sdmac->status = DMA_ERROR; |
1ec1e82f SH |
1520 | return NULL; |
1521 | } | |
1522 | ||
1523 | static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( | |
1524 | struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, | |
185ecb5f | 1525 | size_t period_len, enum dma_transfer_direction direction, |
31c1e5a1 | 1526 | unsigned long flags) |
1ec1e82f SH |
1527 | { |
1528 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1529 | struct sdma_engine *sdma = sdmac->sdma; | |
1530 | int num_periods = buf_len / period_len; | |
23889c63 | 1531 | int channel = sdmac->channel; |
21420841 | 1532 | int i = 0, buf = 0; |
57b772b8 | 1533 | struct sdma_desc *desc; |
1ec1e82f SH |
1534 | |
1535 | dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel); | |
1536 | ||
107d0644 VK |
1537 | sdma_config_write(chan, &sdmac->slave_config, direction); |
1538 | ||
21420841 | 1539 | desc = sdma_transfer_init(sdmac, direction, num_periods); |
57b772b8 RG |
1540 | if (!desc) |
1541 | goto err_out; | |
1542 | ||
76c33d27 | 1543 | desc->period_len = period_len; |
8e2e27c7 | 1544 | |
1ec1e82f | 1545 | sdmac->flags |= IMX_DMA_SG_LOOP; |
1ec1e82f | 1546 | |
4a6b2e8a | 1547 | if (period_len > SDMA_BD_MAX_CNT) { |
ba6ab3b3 | 1548 | dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %zu > %d\n", |
4a6b2e8a | 1549 | channel, period_len, SDMA_BD_MAX_CNT); |
57b772b8 | 1550 | goto err_bd_out; |
1ec1e82f SH |
1551 | } |
1552 | ||
1553 | while (buf < buf_len) { | |
76c33d27 | 1554 | struct sdma_buffer_descriptor *bd = &desc->bd[i]; |
1ec1e82f SH |
1555 | int param; |
1556 | ||
1557 | bd->buffer_addr = dma_addr; | |
1558 | ||
1559 | bd->mode.count = period_len; | |
1560 | ||
1561 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) | |
57b772b8 | 1562 | goto err_bd_out; |
1ec1e82f SH |
1563 | if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES) |
1564 | bd->mode.command = 0; | |
1565 | else | |
1566 | bd->mode.command = sdmac->word_size; | |
1567 | ||
1568 | param = BD_DONE | BD_EXTD | BD_CONT | BD_INTR; | |
1569 | if (i + 1 == num_periods) | |
1570 | param |= BD_WRAP; | |
1571 | ||
ba6ab3b3 | 1572 | dev_dbg(sdma->dev, "entry %d: count: %zu dma: %#llx %s%s\n", |
c3cc74b2 | 1573 | i, period_len, (u64)dma_addr, |
1ec1e82f SH |
1574 | param & BD_WRAP ? "wrap" : "", |
1575 | param & BD_INTR ? " intr" : ""); | |
1576 | ||
1577 | bd->mode.status = param; | |
1578 | ||
1579 | dma_addr += period_len; | |
1580 | buf += period_len; | |
1581 | ||
1582 | i++; | |
1583 | } | |
1584 | ||
57b772b8 RG |
1585 | return vchan_tx_prep(&sdmac->vc, &desc->vd, flags); |
1586 | err_bd_out: | |
1587 | sdma_free_bd(desc); | |
1588 | kfree(desc); | |
1ec1e82f SH |
1589 | err_out: |
1590 | sdmac->status = DMA_ERROR; | |
1591 | return NULL; | |
1592 | } | |
1593 | ||
107d0644 VK |
1594 | static int sdma_config_write(struct dma_chan *chan, |
1595 | struct dma_slave_config *dmaengine_cfg, | |
1596 | enum dma_transfer_direction direction) | |
1ec1e82f SH |
1597 | { |
1598 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1ec1e82f | 1599 | |
107d0644 | 1600 | if (direction == DMA_DEV_TO_MEM) { |
7b350ab0 MR |
1601 | sdmac->per_address = dmaengine_cfg->src_addr; |
1602 | sdmac->watermark_level = dmaengine_cfg->src_maxburst * | |
1603 | dmaengine_cfg->src_addr_width; | |
1604 | sdmac->word_size = dmaengine_cfg->src_addr_width; | |
107d0644 | 1605 | } else if (direction == DMA_DEV_TO_DEV) { |
8391ecf4 SW |
1606 | sdmac->per_address2 = dmaengine_cfg->src_addr; |
1607 | sdmac->per_address = dmaengine_cfg->dst_addr; | |
1608 | sdmac->watermark_level = dmaengine_cfg->src_maxburst & | |
1609 | SDMA_WATERMARK_LEVEL_LWML; | |
1610 | sdmac->watermark_level |= (dmaengine_cfg->dst_maxburst << 16) & | |
1611 | SDMA_WATERMARK_LEVEL_HWML; | |
1612 | sdmac->word_size = dmaengine_cfg->dst_addr_width; | |
7b350ab0 MR |
1613 | } else { |
1614 | sdmac->per_address = dmaengine_cfg->dst_addr; | |
1615 | sdmac->watermark_level = dmaengine_cfg->dst_maxburst * | |
1616 | dmaengine_cfg->dst_addr_width; | |
1617 | sdmac->word_size = dmaengine_cfg->dst_addr_width; | |
1618 | } | |
107d0644 | 1619 | sdmac->direction = direction; |
7b350ab0 | 1620 | return sdma_config_channel(chan); |
1ec1e82f SH |
1621 | } |
1622 | ||
107d0644 VK |
1623 | static int sdma_config(struct dma_chan *chan, |
1624 | struct dma_slave_config *dmaengine_cfg) | |
1625 | { | |
1626 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1627 | ||
1628 | memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg)); | |
1629 | ||
1630 | /* Set ENBLn earlier to make sure dma request triggered after that */ | |
1631 | if (sdmac->event_id0) { | |
1632 | if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) | |
1633 | return -EINVAL; | |
1634 | sdma_event_enable(sdmac, sdmac->event_id0); | |
1635 | } | |
1636 | ||
1637 | if (sdmac->event_id1) { | |
1638 | if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events) | |
1639 | return -EINVAL; | |
1640 | sdma_event_enable(sdmac, sdmac->event_id1); | |
1641 | } | |
1642 | ||
1643 | return 0; | |
1644 | } | |
1645 | ||
1ec1e82f | 1646 | static enum dma_status sdma_tx_status(struct dma_chan *chan, |
e8e3a790 AS |
1647 | dma_cookie_t cookie, |
1648 | struct dma_tx_state *txstate) | |
1ec1e82f SH |
1649 | { |
1650 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
57b772b8 | 1651 | struct sdma_desc *desc; |
d1a792f3 | 1652 | u32 residue; |
57b772b8 RG |
1653 | struct virt_dma_desc *vd; |
1654 | enum dma_status ret; | |
1655 | unsigned long flags; | |
d1a792f3 | 1656 | |
57b772b8 RG |
1657 | ret = dma_cookie_status(chan, cookie, txstate); |
1658 | if (ret == DMA_COMPLETE || !txstate) | |
1659 | return ret; | |
1660 | ||
1661 | spin_lock_irqsave(&sdmac->vc.lock, flags); | |
1662 | vd = vchan_find_desc(&sdmac->vc, cookie); | |
1663 | if (vd) { | |
1664 | desc = to_sdma_desc(&vd->tx); | |
1665 | if (sdmac->flags & IMX_DMA_SG_LOOP) | |
1666 | residue = (desc->num_bd - desc->buf_ptail) * | |
1667 | desc->period_len - desc->chn_real_count; | |
1668 | else | |
1669 | residue = desc->chn_count - desc->chn_real_count; | |
1670 | } else if (sdmac->desc && sdmac->desc->vd.tx.cookie == cookie) { | |
1671 | residue = sdmac->desc->chn_count - sdmac->desc->chn_real_count; | |
1672 | } else { | |
1673 | residue = 0; | |
1674 | } | |
1675 | spin_unlock_irqrestore(&sdmac->vc.lock, flags); | |
1ec1e82f | 1676 | |
e8e3a790 | 1677 | dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie, |
d1a792f3 | 1678 | residue); |
1ec1e82f | 1679 | |
8a965911 | 1680 | return sdmac->status; |
1ec1e82f SH |
1681 | } |
1682 | ||
1683 | static void sdma_issue_pending(struct dma_chan *chan) | |
1684 | { | |
2b4f130e | 1685 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
57b772b8 | 1686 | unsigned long flags; |
2b4f130e | 1687 | |
57b772b8 RG |
1688 | spin_lock_irqsave(&sdmac->vc.lock, flags); |
1689 | if (vchan_issue_pending(&sdmac->vc) && !sdmac->desc) | |
1690 | sdma_start_desc(sdmac); | |
1691 | spin_unlock_irqrestore(&sdmac->vc.lock, flags); | |
1ec1e82f SH |
1692 | } |
1693 | ||
5b28aa31 | 1694 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34 |
cd72b846 | 1695 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38 |
a572460b | 1696 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 41 |
b7d2648a | 1697 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4 42 |
5b28aa31 SH |
1698 | |
1699 | static void sdma_add_scripts(struct sdma_engine *sdma, | |
1700 | const struct sdma_script_start_addrs *addr) | |
1701 | { | |
1702 | s32 *addr_arr = (u32 *)addr; | |
1703 | s32 *saddr_arr = (u32 *)sdma->script_addrs; | |
1704 | int i; | |
1705 | ||
70dabaed NC |
1706 | /* use the default firmware in ROM if missing external firmware */ |
1707 | if (!sdma->script_number) | |
1708 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; | |
1709 | ||
cd72b846 | 1710 | for (i = 0; i < sdma->script_number; i++) |
5b28aa31 SH |
1711 | if (addr_arr[i] > 0) |
1712 | saddr_arr[i] = addr_arr[i]; | |
1713 | } | |
1714 | ||
7b4b88e0 | 1715 | static void sdma_load_firmware(const struct firmware *fw, void *context) |
5b28aa31 | 1716 | { |
7b4b88e0 | 1717 | struct sdma_engine *sdma = context; |
5b28aa31 | 1718 | const struct sdma_firmware_header *header; |
5b28aa31 SH |
1719 | const struct sdma_script_start_addrs *addr; |
1720 | unsigned short *ram_code; | |
1721 | ||
7b4b88e0 | 1722 | if (!fw) { |
0f927a11 SH |
1723 | dev_info(sdma->dev, "external firmware not found, using ROM firmware\n"); |
1724 | /* In this case we just use the ROM firmware. */ | |
7b4b88e0 SH |
1725 | return; |
1726 | } | |
5b28aa31 SH |
1727 | |
1728 | if (fw->size < sizeof(*header)) | |
1729 | goto err_firmware; | |
1730 | ||
1731 | header = (struct sdma_firmware_header *)fw->data; | |
1732 | ||
1733 | if (header->magic != SDMA_FIRMWARE_MAGIC) | |
1734 | goto err_firmware; | |
1735 | if (header->ram_code_start + header->ram_code_size > fw->size) | |
1736 | goto err_firmware; | |
cd72b846 | 1737 | switch (header->version_major) { |
681d15ec AV |
1738 | case 1: |
1739 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; | |
1740 | break; | |
1741 | case 2: | |
1742 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2; | |
1743 | break; | |
a572460b FE |
1744 | case 3: |
1745 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3; | |
1746 | break; | |
b7d2648a FE |
1747 | case 4: |
1748 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4; | |
1749 | break; | |
681d15ec AV |
1750 | default: |
1751 | dev_err(sdma->dev, "unknown firmware version\n"); | |
1752 | goto err_firmware; | |
cd72b846 | 1753 | } |
5b28aa31 SH |
1754 | |
1755 | addr = (void *)header + header->script_addrs_start; | |
1756 | ram_code = (void *)header + header->ram_code_start; | |
1757 | ||
7560e3f3 SH |
1758 | clk_enable(sdma->clk_ipg); |
1759 | clk_enable(sdma->clk_ahb); | |
5b28aa31 SH |
1760 | /* download the RAM image for SDMA */ |
1761 | sdma_load_script(sdma, ram_code, | |
1762 | header->ram_code_size, | |
6866fd3b | 1763 | addr->ram_code_start_addr); |
7560e3f3 SH |
1764 | clk_disable(sdma->clk_ipg); |
1765 | clk_disable(sdma->clk_ahb); | |
5b28aa31 SH |
1766 | |
1767 | sdma_add_scripts(sdma, addr); | |
1768 | ||
1769 | dev_info(sdma->dev, "loaded firmware %d.%d\n", | |
1770 | header->version_major, | |
1771 | header->version_minor); | |
1772 | ||
1773 | err_firmware: | |
1774 | release_firmware(fw); | |
7b4b88e0 SH |
1775 | } |
1776 | ||
d078cd1b ZW |
1777 | #define EVENT_REMAP_CELLS 3 |
1778 | ||
29f493da | 1779 | static int sdma_event_remap(struct sdma_engine *sdma) |
d078cd1b ZW |
1780 | { |
1781 | struct device_node *np = sdma->dev->of_node; | |
1782 | struct device_node *gpr_np = of_parse_phandle(np, "gpr", 0); | |
1783 | struct property *event_remap; | |
1784 | struct regmap *gpr; | |
1785 | char propname[] = "fsl,sdma-event-remap"; | |
1786 | u32 reg, val, shift, num_map, i; | |
1787 | int ret = 0; | |
1788 | ||
1789 | if (IS_ERR(np) || IS_ERR(gpr_np)) | |
1790 | goto out; | |
1791 | ||
1792 | event_remap = of_find_property(np, propname, NULL); | |
1793 | num_map = event_remap ? (event_remap->length / sizeof(u32)) : 0; | |
1794 | if (!num_map) { | |
ce078af7 | 1795 | dev_dbg(sdma->dev, "no event needs to be remapped\n"); |
d078cd1b ZW |
1796 | goto out; |
1797 | } else if (num_map % EVENT_REMAP_CELLS) { | |
1798 | dev_err(sdma->dev, "the property %s must modulo %d\n", | |
1799 | propname, EVENT_REMAP_CELLS); | |
1800 | ret = -EINVAL; | |
1801 | goto out; | |
1802 | } | |
1803 | ||
1804 | gpr = syscon_node_to_regmap(gpr_np); | |
1805 | if (IS_ERR(gpr)) { | |
1806 | dev_err(sdma->dev, "failed to get gpr regmap\n"); | |
1807 | ret = PTR_ERR(gpr); | |
1808 | goto out; | |
1809 | } | |
1810 | ||
1811 | for (i = 0; i < num_map; i += EVENT_REMAP_CELLS) { | |
1812 | ret = of_property_read_u32_index(np, propname, i, ®); | |
1813 | if (ret) { | |
1814 | dev_err(sdma->dev, "failed to read property %s index %d\n", | |
1815 | propname, i); | |
1816 | goto out; | |
1817 | } | |
1818 | ||
1819 | ret = of_property_read_u32_index(np, propname, i + 1, &shift); | |
1820 | if (ret) { | |
1821 | dev_err(sdma->dev, "failed to read property %s index %d\n", | |
1822 | propname, i + 1); | |
1823 | goto out; | |
1824 | } | |
1825 | ||
1826 | ret = of_property_read_u32_index(np, propname, i + 2, &val); | |
1827 | if (ret) { | |
1828 | dev_err(sdma->dev, "failed to read property %s index %d\n", | |
1829 | propname, i + 2); | |
1830 | goto out; | |
1831 | } | |
1832 | ||
1833 | regmap_update_bits(gpr, reg, BIT(shift), val << shift); | |
1834 | } | |
1835 | ||
1836 | out: | |
1837 | if (!IS_ERR(gpr_np)) | |
1838 | of_node_put(gpr_np); | |
1839 | ||
1840 | return ret; | |
1841 | } | |
1842 | ||
fe6cf289 | 1843 | static int sdma_get_firmware(struct sdma_engine *sdma, |
7b4b88e0 SH |
1844 | const char *fw_name) |
1845 | { | |
1846 | int ret; | |
1847 | ||
1848 | ret = request_firmware_nowait(THIS_MODULE, | |
1849 | FW_ACTION_HOTPLUG, fw_name, sdma->dev, | |
1850 | GFP_KERNEL, sdma, sdma_load_firmware); | |
5b28aa31 SH |
1851 | |
1852 | return ret; | |
1853 | } | |
1854 | ||
19bfc772 | 1855 | static int sdma_init(struct sdma_engine *sdma) |
1ec1e82f SH |
1856 | { |
1857 | int i, ret; | |
1858 | dma_addr_t ccb_phys; | |
1859 | ||
b93edcdd FE |
1860 | ret = clk_enable(sdma->clk_ipg); |
1861 | if (ret) | |
1862 | return ret; | |
1863 | ret = clk_enable(sdma->clk_ahb); | |
1864 | if (ret) | |
1865 | goto disable_clk_ipg; | |
1ec1e82f | 1866 | |
941acd56 AAP |
1867 | if (sdma->drvdata->check_ratio && |
1868 | (clk_get_rate(sdma->clk_ahb) == clk_get_rate(sdma->clk_ipg))) | |
25aaa75d AAP |
1869 | sdma->clk_ratio = 1; |
1870 | ||
1ec1e82f | 1871 | /* Be sure SDMA has not started yet */ |
c4b56857 | 1872 | writel_relaxed(0, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f | 1873 | |
ceaf5226 | 1874 | sdma->channel_control = dma_alloc_coherent(sdma->dev, |
1ec1e82f SH |
1875 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) + |
1876 | sizeof(struct sdma_context_data), | |
1877 | &ccb_phys, GFP_KERNEL); | |
1878 | ||
1879 | if (!sdma->channel_control) { | |
1880 | ret = -ENOMEM; | |
1881 | goto err_dma_alloc; | |
1882 | } | |
1883 | ||
1884 | sdma->context = (void *)sdma->channel_control + | |
1885 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1886 | sdma->context_phys = ccb_phys + | |
1887 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1888 | ||
1889 | /* Zero-out the CCB structures array just allocated */ | |
1890 | memset(sdma->channel_control, 0, | |
1891 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control)); | |
1892 | ||
1893 | /* disable all channels */ | |
17bba72f | 1894 | for (i = 0; i < sdma->drvdata->num_events; i++) |
c4b56857 | 1895 | writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i)); |
1ec1e82f SH |
1896 | |
1897 | /* All channels have priority 0 */ | |
1898 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
c4b56857 | 1899 | writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4); |
1ec1e82f | 1900 | |
57b772b8 | 1901 | ret = sdma_request_channel0(sdma); |
1ec1e82f SH |
1902 | if (ret) |
1903 | goto err_dma_alloc; | |
1904 | ||
1905 | sdma_config_ownership(&sdma->channel[0], false, true, false); | |
1906 | ||
1907 | /* Set Command Channel (Channel Zero) */ | |
c4b56857 | 1908 | writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR); |
1ec1e82f SH |
1909 | |
1910 | /* Set bits of CONFIG register but with static context switching */ | |
25aaa75d AAP |
1911 | if (sdma->clk_ratio) |
1912 | writel_relaxed(SDMA_H_CONFIG_ACR, sdma->regs + SDMA_H_CONFIG); | |
1913 | else | |
1914 | writel_relaxed(0, sdma->regs + SDMA_H_CONFIG); | |
1ec1e82f | 1915 | |
c4b56857 | 1916 | writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f | 1917 | |
1ec1e82f SH |
1918 | /* Initializes channel's priorities */ |
1919 | sdma_set_channel_priority(&sdma->channel[0], 7); | |
1920 | ||
7560e3f3 SH |
1921 | clk_disable(sdma->clk_ipg); |
1922 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1923 | |
1924 | return 0; | |
1925 | ||
1926 | err_dma_alloc: | |
7560e3f3 | 1927 | clk_disable(sdma->clk_ahb); |
b93edcdd FE |
1928 | disable_clk_ipg: |
1929 | clk_disable(sdma->clk_ipg); | |
1ec1e82f SH |
1930 | dev_err(sdma->dev, "initialisation failed with %d\n", ret); |
1931 | return ret; | |
1932 | } | |
1933 | ||
9479e17c SG |
1934 | static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param) |
1935 | { | |
0b351865 | 1936 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
9479e17c SG |
1937 | struct imx_dma_data *data = fn_param; |
1938 | ||
1939 | if (!imx_dma_is_general_purpose(chan)) | |
1940 | return false; | |
1941 | ||
0b351865 NC |
1942 | sdmac->data = *data; |
1943 | chan->private = &sdmac->data; | |
9479e17c SG |
1944 | |
1945 | return true; | |
1946 | } | |
1947 | ||
1948 | static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec, | |
1949 | struct of_dma *ofdma) | |
1950 | { | |
1951 | struct sdma_engine *sdma = ofdma->of_dma_data; | |
1952 | dma_cap_mask_t mask = sdma->dma_device.cap_mask; | |
1953 | struct imx_dma_data data; | |
1954 | ||
1955 | if (dma_spec->args_count != 3) | |
1956 | return NULL; | |
1957 | ||
1958 | data.dma_request = dma_spec->args[0]; | |
1959 | data.peripheral_type = dma_spec->args[1]; | |
1960 | data.priority = dma_spec->args[2]; | |
8391ecf4 SW |
1961 | /* |
1962 | * init dma_request2 to zero, which is not used by the dts. | |
1963 | * For P2P, dma_request2 is init from dma_request_channel(), | |
1964 | * chan->private will point to the imx_dma_data, and in | |
1965 | * device_alloc_chan_resources(), imx_dma_data.dma_request2 will | |
1966 | * be set to sdmac->event_id1. | |
1967 | */ | |
1968 | data.dma_request2 = 0; | |
9479e17c | 1969 | |
990c0b53 BW |
1970 | return __dma_request_channel(&mask, sdma_filter_fn, &data, |
1971 | ofdma->of_node); | |
9479e17c SG |
1972 | } |
1973 | ||
e34b731f | 1974 | static int sdma_probe(struct platform_device *pdev) |
1ec1e82f | 1975 | { |
580975d7 SG |
1976 | const struct of_device_id *of_id = |
1977 | of_match_device(sdma_dt_ids, &pdev->dev); | |
1978 | struct device_node *np = pdev->dev.of_node; | |
8391ecf4 | 1979 | struct device_node *spba_bus; |
580975d7 | 1980 | const char *fw_name; |
1ec1e82f | 1981 | int ret; |
1ec1e82f | 1982 | int irq; |
1ec1e82f | 1983 | struct resource *iores; |
8391ecf4 | 1984 | struct resource spba_res; |
d4adcc01 | 1985 | struct sdma_platform_data *pdata = dev_get_platdata(&pdev->dev); |
1ec1e82f | 1986 | int i; |
1ec1e82f | 1987 | struct sdma_engine *sdma; |
36e2f21a | 1988 | s32 *saddr_arr; |
17bba72f SH |
1989 | const struct sdma_driver_data *drvdata = NULL; |
1990 | ||
1991 | if (of_id) | |
1992 | drvdata = of_id->data; | |
1993 | else if (pdev->id_entry) | |
1994 | drvdata = (void *)pdev->id_entry->driver_data; | |
1995 | ||
1996 | if (!drvdata) { | |
1997 | dev_err(&pdev->dev, "unable to find driver data\n"); | |
1998 | return -EINVAL; | |
1999 | } | |
1ec1e82f | 2000 | |
42536b9f PR |
2001 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
2002 | if (ret) | |
2003 | return ret; | |
2004 | ||
7f24e0ee | 2005 | sdma = devm_kzalloc(&pdev->dev, sizeof(*sdma), GFP_KERNEL); |
1ec1e82f SH |
2006 | if (!sdma) |
2007 | return -ENOMEM; | |
2008 | ||
2ccaef05 | 2009 | spin_lock_init(&sdma->channel_0_lock); |
73eab978 | 2010 | |
1ec1e82f | 2011 | sdma->dev = &pdev->dev; |
17bba72f | 2012 | sdma->drvdata = drvdata; |
1ec1e82f | 2013 | |
1ec1e82f | 2014 | irq = platform_get_irq(pdev, 0); |
7f24e0ee | 2015 | if (irq < 0) |
63c72e02 | 2016 | return irq; |
1ec1e82f | 2017 | |
7f24e0ee FE |
2018 | iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2019 | sdma->regs = devm_ioremap_resource(&pdev->dev, iores); | |
2020 | if (IS_ERR(sdma->regs)) | |
2021 | return PTR_ERR(sdma->regs); | |
1ec1e82f | 2022 | |
7560e3f3 | 2023 | sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
7f24e0ee FE |
2024 | if (IS_ERR(sdma->clk_ipg)) |
2025 | return PTR_ERR(sdma->clk_ipg); | |
1ec1e82f | 2026 | |
7560e3f3 | 2027 | sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); |
7f24e0ee FE |
2028 | if (IS_ERR(sdma->clk_ahb)) |
2029 | return PTR_ERR(sdma->clk_ahb); | |
7560e3f3 | 2030 | |
fb9caf37 AY |
2031 | ret = clk_prepare(sdma->clk_ipg); |
2032 | if (ret) | |
2033 | return ret; | |
2034 | ||
2035 | ret = clk_prepare(sdma->clk_ahb); | |
2036 | if (ret) | |
2037 | goto err_clk; | |
7560e3f3 | 2038 | |
7f24e0ee FE |
2039 | ret = devm_request_irq(&pdev->dev, irq, sdma_int_handler, 0, "sdma", |
2040 | sdma); | |
1ec1e82f | 2041 | if (ret) |
fb9caf37 | 2042 | goto err_irq; |
1ec1e82f | 2043 | |
5bb9dbb5 VK |
2044 | sdma->irq = irq; |
2045 | ||
5b28aa31 | 2046 | sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL); |
fb9caf37 AY |
2047 | if (!sdma->script_addrs) { |
2048 | ret = -ENOMEM; | |
2049 | goto err_irq; | |
2050 | } | |
1ec1e82f | 2051 | |
36e2f21a SH |
2052 | /* initially no scripts available */ |
2053 | saddr_arr = (s32 *)sdma->script_addrs; | |
2054 | for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++) | |
2055 | saddr_arr[i] = -EINVAL; | |
2056 | ||
7214a8b1 SH |
2057 | dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask); |
2058 | dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask); | |
0f06c027 | 2059 | dma_cap_set(DMA_MEMCPY, sdma->dma_device.cap_mask); |
7214a8b1 | 2060 | |
1ec1e82f SH |
2061 | INIT_LIST_HEAD(&sdma->dma_device.channels); |
2062 | /* Initialize channel parameters */ | |
2063 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
2064 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
2065 | ||
2066 | sdmac->sdma = sdma; | |
1ec1e82f | 2067 | |
1ec1e82f | 2068 | sdmac->channel = i; |
57b772b8 | 2069 | sdmac->vc.desc_free = sdma_desc_free; |
b8603d2a LS |
2070 | INIT_WORK(&sdmac->terminate_worker, |
2071 | sdma_channel_terminate_work); | |
23889c63 SH |
2072 | /* |
2073 | * Add the channel to the DMAC list. Do not add channel 0 though | |
2074 | * because we need it internally in the SDMA driver. This also means | |
2075 | * that channel 0 in dmaengine counting matches sdma channel 1. | |
2076 | */ | |
2077 | if (i) | |
57b772b8 | 2078 | vchan_init(&sdmac->vc, &sdma->dma_device); |
1ec1e82f SH |
2079 | } |
2080 | ||
5b28aa31 | 2081 | ret = sdma_init(sdma); |
1ec1e82f SH |
2082 | if (ret) |
2083 | goto err_init; | |
2084 | ||
d078cd1b ZW |
2085 | ret = sdma_event_remap(sdma); |
2086 | if (ret) | |
2087 | goto err_init; | |
2088 | ||
dcfec3c0 SH |
2089 | if (sdma->drvdata->script_addrs) |
2090 | sdma_add_scripts(sdma, sdma->drvdata->script_addrs); | |
580975d7 | 2091 | if (pdata && pdata->script_addrs) |
5b28aa31 SH |
2092 | sdma_add_scripts(sdma, pdata->script_addrs); |
2093 | ||
1ec1e82f SH |
2094 | sdma->dma_device.dev = &pdev->dev; |
2095 | ||
2096 | sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources; | |
2097 | sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources; | |
2098 | sdma->dma_device.device_tx_status = sdma_tx_status; | |
2099 | sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg; | |
2100 | sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic; | |
7b350ab0 | 2101 | sdma->dma_device.device_config = sdma_config; |
b8603d2a LS |
2102 | sdma->dma_device.device_terminate_all = sdma_disable_channel_async; |
2103 | sdma->dma_device.device_synchronize = sdma_channel_synchronize; | |
f9d4a398 NC |
2104 | sdma->dma_device.src_addr_widths = SDMA_DMA_BUSWIDTHS; |
2105 | sdma->dma_device.dst_addr_widths = SDMA_DMA_BUSWIDTHS; | |
2106 | sdma->dma_device.directions = SDMA_DMA_DIRECTIONS; | |
6f3125ce | 2107 | sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT; |
0f06c027 | 2108 | sdma->dma_device.device_prep_dma_memcpy = sdma_prep_memcpy; |
1ec1e82f | 2109 | sdma->dma_device.device_issue_pending = sdma_issue_pending; |
b9b3f82f | 2110 | sdma->dma_device.dev->dma_parms = &sdma->dma_parms; |
a3711d49 | 2111 | sdma->dma_device.copy_align = 2; |
4a6b2e8a | 2112 | dma_set_max_seg_size(sdma->dma_device.dev, SDMA_BD_MAX_CNT); |
1ec1e82f | 2113 | |
23e11811 VR |
2114 | platform_set_drvdata(pdev, sdma); |
2115 | ||
1ec1e82f SH |
2116 | ret = dma_async_device_register(&sdma->dma_device); |
2117 | if (ret) { | |
2118 | dev_err(&pdev->dev, "unable to register\n"); | |
2119 | goto err_init; | |
2120 | } | |
2121 | ||
9479e17c SG |
2122 | if (np) { |
2123 | ret = of_dma_controller_register(np, sdma_xlate, sdma); | |
2124 | if (ret) { | |
2125 | dev_err(&pdev->dev, "failed to register controller\n"); | |
2126 | goto err_register; | |
2127 | } | |
8391ecf4 SW |
2128 | |
2129 | spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus"); | |
2130 | ret = of_address_to_resource(spba_bus, 0, &spba_res); | |
2131 | if (!ret) { | |
2132 | sdma->spba_start_addr = spba_res.start; | |
2133 | sdma->spba_end_addr = spba_res.end; | |
2134 | } | |
2135 | of_node_put(spba_bus); | |
9479e17c SG |
2136 | } |
2137 | ||
2b8066c3 SVA |
2138 | /* |
2139 | * Kick off firmware loading as the very last step: | |
2140 | * attempt to load firmware only if we're not on the error path, because | |
2141 | * the firmware callback requires a fully functional and allocated sdma | |
2142 | * instance. | |
2143 | */ | |
2144 | if (pdata) { | |
2145 | ret = sdma_get_firmware(sdma, pdata->fw_name); | |
2146 | if (ret) | |
2147 | dev_warn(&pdev->dev, "failed to get firmware from platform data\n"); | |
2148 | } else { | |
2149 | /* | |
2150 | * Because that device tree does not encode ROM script address, | |
2151 | * the RAM script in firmware is mandatory for device tree | |
2152 | * probe, otherwise it fails. | |
2153 | */ | |
2154 | ret = of_property_read_string(np, "fsl,sdma-ram-script-name", | |
2155 | &fw_name); | |
2156 | if (ret) { | |
2157 | dev_warn(&pdev->dev, "failed to get firmware name\n"); | |
2158 | } else { | |
2159 | ret = sdma_get_firmware(sdma, fw_name); | |
2160 | if (ret) | |
2161 | dev_warn(&pdev->dev, "failed to get firmware from device tree\n"); | |
2162 | } | |
2163 | } | |
2164 | ||
1ec1e82f SH |
2165 | return 0; |
2166 | ||
9479e17c SG |
2167 | err_register: |
2168 | dma_async_device_unregister(&sdma->dma_device); | |
1ec1e82f SH |
2169 | err_init: |
2170 | kfree(sdma->script_addrs); | |
fb9caf37 AY |
2171 | err_irq: |
2172 | clk_unprepare(sdma->clk_ahb); | |
2173 | err_clk: | |
2174 | clk_unprepare(sdma->clk_ipg); | |
939fd4f0 | 2175 | return ret; |
1ec1e82f SH |
2176 | } |
2177 | ||
1d1bbd30 | 2178 | static int sdma_remove(struct platform_device *pdev) |
1ec1e82f | 2179 | { |
23e11811 | 2180 | struct sdma_engine *sdma = platform_get_drvdata(pdev); |
c12fe497 | 2181 | int i; |
23e11811 | 2182 | |
5bb9dbb5 | 2183 | devm_free_irq(&pdev->dev, sdma->irq, sdma); |
23e11811 VR |
2184 | dma_async_device_unregister(&sdma->dma_device); |
2185 | kfree(sdma->script_addrs); | |
fb9caf37 AY |
2186 | clk_unprepare(sdma->clk_ahb); |
2187 | clk_unprepare(sdma->clk_ipg); | |
c12fe497 VR |
2188 | /* Kill the tasklet */ |
2189 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
2190 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
2191 | ||
57b772b8 RG |
2192 | tasklet_kill(&sdmac->vc.task); |
2193 | sdma_free_chan_resources(&sdmac->vc.chan); | |
c12fe497 | 2194 | } |
23e11811 VR |
2195 | |
2196 | platform_set_drvdata(pdev, NULL); | |
23e11811 | 2197 | return 0; |
1ec1e82f SH |
2198 | } |
2199 | ||
2200 | static struct platform_driver sdma_driver = { | |
2201 | .driver = { | |
2202 | .name = "imx-sdma", | |
580975d7 | 2203 | .of_match_table = sdma_dt_ids, |
1ec1e82f | 2204 | }, |
62550cd7 | 2205 | .id_table = sdma_devtypes, |
1d1bbd30 | 2206 | .remove = sdma_remove, |
23e11811 | 2207 | .probe = sdma_probe, |
1ec1e82f SH |
2208 | }; |
2209 | ||
23e11811 | 2210 | module_platform_driver(sdma_driver); |
1ec1e82f SH |
2211 | |
2212 | MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>"); | |
2213 | MODULE_DESCRIPTION("i.MX SDMA driver"); | |
c0879342 NC |
2214 | #if IS_ENABLED(CONFIG_SOC_IMX6Q) |
2215 | MODULE_FIRMWARE("imx/sdma/sdma-imx6q.bin"); | |
2216 | #endif | |
2217 | #if IS_ENABLED(CONFIG_SOC_IMX7D) | |
2218 | MODULE_FIRMWARE("imx/sdma/sdma-imx7d.bin"); | |
2219 | #endif | |
1ec1e82f | 2220 | MODULE_LICENSE("GPL"); |