Commit | Line | Data |
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4bbbc1ad JY |
1 | /* |
2 | * GPMC support functions | |
3 | * | |
4 | * Copyright (C) 2005-2006 Nokia Corporation | |
5 | * | |
6 | * Author: Juha Yrjola | |
7 | * | |
44169075 SS |
8 | * Copyright (C) 2009 Texas Instruments |
9 | * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> | |
10 | * | |
4bbbc1ad JY |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
db97eb7d | 15 | #include <linux/irq.h> |
4bbbc1ad JY |
16 | #include <linux/kernel.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/clk.h> | |
f37e4580 ID |
20 | #include <linux/ioport.h> |
21 | #include <linux/spinlock.h> | |
fced80c7 | 22 | #include <linux/io.h> |
fd1dc87d | 23 | #include <linux/module.h> |
db97eb7d | 24 | #include <linux/interrupt.h> |
da496873 | 25 | #include <linux/platform_device.h> |
bc6b1e7b | 26 | #include <linux/of.h> |
cdd6928c | 27 | #include <linux/of_address.h> |
bc6b1e7b DM |
28 | #include <linux/of_mtd.h> |
29 | #include <linux/of_device.h> | |
b1dc1ca9 | 30 | #include <linux/of_platform.h> |
e639cd5b | 31 | #include <linux/omap-gpmc.h> |
bc6b1e7b | 32 | #include <linux/mtd/nand.h> |
b3f5525c | 33 | #include <linux/pm_runtime.h> |
4bbbc1ad | 34 | |
bc3668ea | 35 | #include <linux/platform_data/mtd-nand-omap2.h> |
e639cd5b | 36 | #include <linux/platform_data/mtd-onenand-omap2.h> |
4bbbc1ad | 37 | |
7f245162 | 38 | #include <asm/mach-types.h> |
72d0f1c3 | 39 | |
4be48fd5 AM |
40 | #define DEVICE_NAME "omap-gpmc" |
41 | ||
fd1dc87d | 42 | /* GPMC register offsets */ |
4bbbc1ad JY |
43 | #define GPMC_REVISION 0x00 |
44 | #define GPMC_SYSCONFIG 0x10 | |
45 | #define GPMC_SYSSTATUS 0x14 | |
46 | #define GPMC_IRQSTATUS 0x18 | |
47 | #define GPMC_IRQENABLE 0x1c | |
48 | #define GPMC_TIMEOUT_CONTROL 0x40 | |
49 | #define GPMC_ERR_ADDRESS 0x44 | |
50 | #define GPMC_ERR_TYPE 0x48 | |
51 | #define GPMC_CONFIG 0x50 | |
52 | #define GPMC_STATUS 0x54 | |
53 | #define GPMC_PREFETCH_CONFIG1 0x1e0 | |
54 | #define GPMC_PREFETCH_CONFIG2 0x1e4 | |
15e02a3b | 55 | #define GPMC_PREFETCH_CONTROL 0x1ec |
4bbbc1ad JY |
56 | #define GPMC_PREFETCH_STATUS 0x1f0 |
57 | #define GPMC_ECC_CONFIG 0x1f4 | |
58 | #define GPMC_ECC_CONTROL 0x1f8 | |
59 | #define GPMC_ECC_SIZE_CONFIG 0x1fc | |
948d38e7 | 60 | #define GPMC_ECC1_RESULT 0x200 |
8d602cf5 | 61 | #define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */ |
2fdf0c98 AM |
62 | #define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */ |
63 | #define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */ | |
64 | #define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */ | |
27c9fd60 | 65 | #define GPMC_ECC_BCH_RESULT_4 0x300 /* not available on OMAP2 */ |
66 | #define GPMC_ECC_BCH_RESULT_5 0x304 /* not available on OMAP2 */ | |
67 | #define GPMC_ECC_BCH_RESULT_6 0x308 /* not available on OMAP2 */ | |
4bbbc1ad | 68 | |
2c65e744 YY |
69 | /* GPMC ECC control settings */ |
70 | #define GPMC_ECC_CTRL_ECCCLEAR 0x100 | |
71 | #define GPMC_ECC_CTRL_ECCDISABLE 0x000 | |
72 | #define GPMC_ECC_CTRL_ECCREG1 0x001 | |
73 | #define GPMC_ECC_CTRL_ECCREG2 0x002 | |
74 | #define GPMC_ECC_CTRL_ECCREG3 0x003 | |
75 | #define GPMC_ECC_CTRL_ECCREG4 0x004 | |
76 | #define GPMC_ECC_CTRL_ECCREG5 0x005 | |
77 | #define GPMC_ECC_CTRL_ECCREG6 0x006 | |
78 | #define GPMC_ECC_CTRL_ECCREG7 0x007 | |
79 | #define GPMC_ECC_CTRL_ECCREG8 0x008 | |
80 | #define GPMC_ECC_CTRL_ECCREG9 0x009 | |
81 | ||
e378d22b RQ |
82 | #define GPMC_CONFIG_LIMITEDADDRESS BIT(1) |
83 | ||
512d73d1 RQ |
84 | #define GPMC_STATUS_EMPTYWRITEBUFFERSTATUS BIT(0) |
85 | ||
559d94b0 AM |
86 | #define GPMC_CONFIG2_CSEXTRADELAY BIT(7) |
87 | #define GPMC_CONFIG3_ADVEXTRADELAY BIT(7) | |
88 | #define GPMC_CONFIG4_OEEXTRADELAY BIT(7) | |
89 | #define GPMC_CONFIG4_WEEXTRADELAY BIT(23) | |
90 | #define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6) | |
91 | #define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7) | |
92 | ||
948d38e7 | 93 | #define GPMC_CS0_OFFSET 0x60 |
4bbbc1ad | 94 | #define GPMC_CS_SIZE 0x30 |
2fdf0c98 | 95 | #define GPMC_BCH_SIZE 0x10 |
4bbbc1ad | 96 | |
f37e4580 | 97 | #define GPMC_MEM_END 0x3FFFFFFF |
f37e4580 ID |
98 | |
99 | #define GPMC_CHUNK_SHIFT 24 /* 16 MB */ | |
100 | #define GPMC_SECTION_SHIFT 28 /* 128 MB */ | |
101 | ||
59e9c5ae | 102 | #define CS_NUM_SHIFT 24 |
103 | #define ENABLE_PREFETCH (0x1 << 7) | |
104 | #define DMA_MPU_MODE 2 | |
105 | ||
da496873 AM |
106 | #define GPMC_REVISION_MAJOR(l) ((l >> 4) & 0xf) |
107 | #define GPMC_REVISION_MINOR(l) (l & 0xf) | |
108 | ||
109 | #define GPMC_HAS_WR_ACCESS 0x1 | |
110 | #define GPMC_HAS_WR_DATA_MUX_BUS 0x2 | |
aa8d4767 | 111 | #define GPMC_HAS_MUX_AAD 0x4 |
da496873 | 112 | |
9f833156 JH |
113 | #define GPMC_NR_WAITPINS 4 |
114 | ||
e639cd5b TL |
115 | #define GPMC_CS_CONFIG1 0x00 |
116 | #define GPMC_CS_CONFIG2 0x04 | |
117 | #define GPMC_CS_CONFIG3 0x08 | |
118 | #define GPMC_CS_CONFIG4 0x0c | |
119 | #define GPMC_CS_CONFIG5 0x10 | |
120 | #define GPMC_CS_CONFIG6 0x14 | |
121 | #define GPMC_CS_CONFIG7 0x18 | |
122 | #define GPMC_CS_NAND_COMMAND 0x1c | |
123 | #define GPMC_CS_NAND_ADDRESS 0x20 | |
124 | #define GPMC_CS_NAND_DATA 0x24 | |
125 | ||
126 | /* Control Commands */ | |
127 | #define GPMC_CONFIG_RDY_BSY 0x00000001 | |
128 | #define GPMC_CONFIG_DEV_SIZE 0x00000002 | |
129 | #define GPMC_CONFIG_DEV_TYPE 0x00000003 | |
130 | #define GPMC_SET_IRQ_STATUS 0x00000004 | |
131 | ||
132 | #define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31) | |
133 | #define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30) | |
134 | #define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29) | |
135 | #define GPMC_CONFIG1_READTYPE_SYNC (1 << 29) | |
136 | #define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28) | |
137 | #define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27) | |
138 | #define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27) | |
139 | #define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25) | |
4b613e9b RA |
140 | /** CLKACTIVATIONTIME Max Ticks */ |
141 | #define GPMC_CONFIG1_CLKACTIVATIONTIME_MAX 2 | |
e639cd5b | 142 | #define GPMC_CONFIG1_PAGE_LEN(val) ((val & 3) << 23) |
4b613e9b RA |
143 | /** ATTACHEDDEVICEPAGELENGTH Max Value */ |
144 | #define GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX 2 | |
e639cd5b TL |
145 | #define GPMC_CONFIG1_WAIT_READ_MON (1 << 22) |
146 | #define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21) | |
2e676901 RA |
147 | #define GPMC_CONFIG1_WAIT_MON_TIME(val) ((val & 3) << 18) |
148 | /** WAITMONITORINGTIME Max Ticks */ | |
149 | #define GPMC_CONFIG1_WAITMONITORINGTIME_MAX 2 | |
e639cd5b TL |
150 | #define GPMC_CONFIG1_WAIT_PIN_SEL(val) ((val & 3) << 16) |
151 | #define GPMC_CONFIG1_DEVICESIZE(val) ((val & 3) << 12) | |
152 | #define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1) | |
4b613e9b RA |
153 | /** DEVICESIZE Max Value */ |
154 | #define GPMC_CONFIG1_DEVICESIZE_MAX 1 | |
e639cd5b TL |
155 | #define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10) |
156 | #define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0) | |
157 | #define GPMC_CONFIG1_MUXTYPE(val) ((val & 3) << 8) | |
158 | #define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4) | |
159 | #define GPMC_CONFIG1_FCLK_DIV(val) (val & 3) | |
160 | #define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1)) | |
161 | #define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2)) | |
162 | #define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3)) | |
163 | #define GPMC_CONFIG7_CSVALID (1 << 6) | |
164 | ||
9c4f757e SP |
165 | #define GPMC_CONFIG7_BASEADDRESS_MASK 0x3f |
166 | #define GPMC_CONFIG7_CSVALID_MASK BIT(6) | |
167 | #define GPMC_CONFIG7_MASKADDRESS_OFFSET 8 | |
168 | #define GPMC_CONFIG7_MASKADDRESS_MASK (0xf << GPMC_CONFIG7_MASKADDRESS_OFFSET) | |
169 | /* All CONFIG7 bits except reserved bits */ | |
170 | #define GPMC_CONFIG7_MASK (GPMC_CONFIG7_BASEADDRESS_MASK | \ | |
171 | GPMC_CONFIG7_CSVALID_MASK | \ | |
172 | GPMC_CONFIG7_MASKADDRESS_MASK) | |
173 | ||
e639cd5b TL |
174 | #define GPMC_DEVICETYPE_NOR 0 |
175 | #define GPMC_DEVICETYPE_NAND 2 | |
176 | #define GPMC_CONFIG_WRITEPROTECT 0x00000010 | |
177 | #define WR_RD_PIN_MONITORING 0x00600000 | |
178 | ||
179 | #define GPMC_ENABLE_IRQ 0x0000000d | |
180 | ||
181 | /* ECC commands */ | |
182 | #define GPMC_ECC_READ 0 /* Reset Hardware ECC for read */ | |
183 | #define GPMC_ECC_WRITE 1 /* Reset Hardware ECC for write */ | |
184 | #define GPMC_ECC_READSYN 2 /* Reset before syndrom is read back */ | |
185 | ||
6b6c32fc AM |
186 | /* XXX: Only NAND irq has been considered,currently these are the only ones used |
187 | */ | |
188 | #define GPMC_NR_IRQ 2 | |
189 | ||
7f2e8c58 RA |
190 | enum gpmc_clk_domain { |
191 | GPMC_CD_FCLK, | |
192 | GPMC_CD_CLK | |
193 | }; | |
194 | ||
9ed7a776 TL |
195 | struct gpmc_cs_data { |
196 | const char *name; | |
197 | ||
198 | #define GPMC_CS_RESERVED (1 << 0) | |
199 | u32 flags; | |
200 | ||
201 | struct resource mem; | |
202 | }; | |
203 | ||
6b6c32fc AM |
204 | struct gpmc_client_irq { |
205 | unsigned irq; | |
206 | u32 bitmask; | |
207 | }; | |
208 | ||
a2d3e7ba RN |
209 | /* Structure to save gpmc cs context */ |
210 | struct gpmc_cs_config { | |
211 | u32 config1; | |
212 | u32 config2; | |
213 | u32 config3; | |
214 | u32 config4; | |
215 | u32 config5; | |
216 | u32 config6; | |
217 | u32 config7; | |
218 | int is_valid; | |
219 | }; | |
220 | ||
221 | /* | |
222 | * Structure to save/restore gpmc context | |
223 | * to support core off on OMAP3 | |
224 | */ | |
225 | struct omap3_gpmc_regs { | |
226 | u32 sysconfig; | |
227 | u32 irqenable; | |
228 | u32 timeout_ctrl; | |
229 | u32 config; | |
230 | u32 prefetch_config1; | |
231 | u32 prefetch_config2; | |
232 | u32 prefetch_control; | |
233 | struct gpmc_cs_config cs_context[GPMC_CS_NUM]; | |
234 | }; | |
235 | ||
6b6c32fc AM |
236 | static struct gpmc_client_irq gpmc_client_irq[GPMC_NR_IRQ]; |
237 | static struct irq_chip gpmc_irq_chip; | |
af072196 | 238 | static int gpmc_irq_start; |
6b6c32fc | 239 | |
f37e4580 | 240 | static struct resource gpmc_mem_root; |
9ed7a776 | 241 | static struct gpmc_cs_data gpmc_cs[GPMC_CS_NUM]; |
87b247c4 | 242 | static DEFINE_SPINLOCK(gpmc_mem_lock); |
6797b4fe | 243 | /* Define chip-selects as reserved by default until probe completes */ |
f34f3716 | 244 | static unsigned int gpmc_cs_num = GPMC_CS_NUM; |
9f833156 | 245 | static unsigned int gpmc_nr_waitpins; |
da496873 AM |
246 | static struct device *gpmc_dev; |
247 | static int gpmc_irq; | |
248 | static resource_size_t phys_base, mem_size; | |
249 | static unsigned gpmc_capability; | |
fd1dc87d | 250 | static void __iomem *gpmc_base; |
4bbbc1ad | 251 | |
fd1dc87d | 252 | static struct clk *gpmc_l3_clk; |
4bbbc1ad | 253 | |
db97eb7d SG |
254 | static irqreturn_t gpmc_handle_irq(int irq, void *dev); |
255 | ||
4bbbc1ad JY |
256 | static void gpmc_write_reg(int idx, u32 val) |
257 | { | |
edfaf05c | 258 | writel_relaxed(val, gpmc_base + idx); |
4bbbc1ad JY |
259 | } |
260 | ||
261 | static u32 gpmc_read_reg(int idx) | |
262 | { | |
edfaf05c | 263 | return readl_relaxed(gpmc_base + idx); |
4bbbc1ad JY |
264 | } |
265 | ||
266 | void gpmc_cs_write_reg(int cs, int idx, u32 val) | |
267 | { | |
268 | void __iomem *reg_addr; | |
269 | ||
948d38e7 | 270 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 271 | writel_relaxed(val, reg_addr); |
4bbbc1ad JY |
272 | } |
273 | ||
3fc089e7 | 274 | static u32 gpmc_cs_read_reg(int cs, int idx) |
4bbbc1ad | 275 | { |
fd1dc87d PW |
276 | void __iomem *reg_addr; |
277 | ||
948d38e7 | 278 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 279 | return readl_relaxed(reg_addr); |
4bbbc1ad JY |
280 | } |
281 | ||
fd1dc87d | 282 | /* TODO: Add support for gpmc_fck to clock framework and use it */ |
3fc089e7 | 283 | static unsigned long gpmc_get_fclk_period(void) |
4bbbc1ad | 284 | { |
fd1dc87d PW |
285 | unsigned long rate = clk_get_rate(gpmc_l3_clk); |
286 | ||
fd1dc87d PW |
287 | rate /= 1000; |
288 | rate = 1000000000 / rate; /* In picoseconds */ | |
289 | ||
290 | return rate; | |
4bbbc1ad JY |
291 | } |
292 | ||
7f2e8c58 RA |
293 | /** |
294 | * gpmc_get_clk_period - get period of selected clock domain in ps | |
295 | * @cs Chip Select Region. | |
296 | * @cd Clock Domain. | |
297 | * | |
298 | * GPMC_CS_CONFIG1 GPMCFCLKDIVIDER for cs has to be setup | |
299 | * prior to calling this function with GPMC_CD_CLK. | |
300 | */ | |
301 | static unsigned long gpmc_get_clk_period(int cs, enum gpmc_clk_domain cd) | |
302 | { | |
303 | ||
304 | unsigned long tick_ps = gpmc_get_fclk_period(); | |
305 | u32 l; | |
306 | int div; | |
307 | ||
308 | switch (cd) { | |
309 | case GPMC_CD_CLK: | |
310 | /* get current clk divider */ | |
311 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); | |
312 | div = (l & 0x03) + 1; | |
313 | /* get GPMC_CLK period */ | |
314 | tick_ps *= div; | |
315 | break; | |
316 | case GPMC_CD_FCLK: | |
317 | /* FALL-THROUGH */ | |
318 | default: | |
319 | break; | |
320 | } | |
321 | ||
322 | return tick_ps; | |
323 | ||
324 | } | |
325 | ||
326 | static unsigned int gpmc_ns_to_clk_ticks(unsigned int time_ns, int cs, | |
327 | enum gpmc_clk_domain cd) | |
4bbbc1ad JY |
328 | { |
329 | unsigned long tick_ps; | |
330 | ||
331 | /* Calculate in picosecs to yield more exact results */ | |
7f2e8c58 | 332 | tick_ps = gpmc_get_clk_period(cs, cd); |
4bbbc1ad JY |
333 | |
334 | return (time_ns * 1000 + tick_ps - 1) / tick_ps; | |
335 | } | |
336 | ||
7f2e8c58 RA |
337 | static unsigned int gpmc_ns_to_ticks(unsigned int time_ns) |
338 | { | |
339 | return gpmc_ns_to_clk_ticks(time_ns, /* any CS */ 0, GPMC_CD_FCLK); | |
340 | } | |
341 | ||
3fc089e7 | 342 | static unsigned int gpmc_ps_to_ticks(unsigned int time_ps) |
a3551f5b AH |
343 | { |
344 | unsigned long tick_ps; | |
345 | ||
346 | /* Calculate in picosecs to yield more exact results */ | |
347 | tick_ps = gpmc_get_fclk_period(); | |
348 | ||
349 | return (time_ps + tick_ps - 1) / tick_ps; | |
350 | } | |
351 | ||
7f2e8c58 RA |
352 | unsigned int gpmc_clk_ticks_to_ns(unsigned ticks, int cs, |
353 | enum gpmc_clk_domain cd) | |
354 | { | |
355 | return ticks * gpmc_get_clk_period(cs, cd) / 1000; | |
356 | } | |
357 | ||
fd1dc87d PW |
358 | unsigned int gpmc_ticks_to_ns(unsigned int ticks) |
359 | { | |
7f2e8c58 | 360 | return gpmc_clk_ticks_to_ns(ticks, /* any CS */ 0, GPMC_CD_FCLK); |
fd1dc87d PW |
361 | } |
362 | ||
246da26d AM |
363 | static unsigned int gpmc_ticks_to_ps(unsigned int ticks) |
364 | { | |
365 | return ticks * gpmc_get_fclk_period(); | |
366 | } | |
367 | ||
368 | static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps) | |
369 | { | |
370 | unsigned long ticks = gpmc_ps_to_ticks(time_ps); | |
371 | ||
372 | return ticks * gpmc_get_fclk_period(); | |
373 | } | |
374 | ||
559d94b0 AM |
375 | static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value) |
376 | { | |
377 | u32 l; | |
378 | ||
379 | l = gpmc_cs_read_reg(cs, reg); | |
380 | if (value) | |
381 | l |= mask; | |
382 | else | |
383 | l &= ~mask; | |
384 | gpmc_cs_write_reg(cs, reg, l); | |
385 | } | |
386 | ||
387 | static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p) | |
388 | { | |
389 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1, | |
390 | GPMC_CONFIG1_TIME_PARA_GRAN, | |
391 | p->time_para_granularity); | |
392 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2, | |
393 | GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay); | |
394 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3, | |
395 | GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay); | |
396 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
397 | GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay); | |
398 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
399 | GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay); | |
400 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, | |
401 | GPMC_CONFIG6_CYCLE2CYCLESAMECSEN, | |
402 | p->cycle2cyclesamecsen); | |
403 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, | |
404 | GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN, | |
405 | p->cycle2cyclediffcsen); | |
406 | } | |
407 | ||
63aa945b | 408 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
563dbb26 RA |
409 | /** |
410 | * get_gpmc_timing_reg - read a timing parameter and print DTS settings for it. | |
411 | * @cs: Chip Select Region | |
412 | * @reg: GPMC_CS_CONFIGn register offset. | |
413 | * @st_bit: Start Bit | |
414 | * @end_bit: End Bit. Must be >= @st_bit. | |
4b613e9b RA |
415 | * @ma:x Maximum parameter value (before optional @shift). |
416 | * If 0, maximum is as high as @st_bit and @end_bit allow. | |
563dbb26 | 417 | * @name: DTS node name, w/o "gpmc," |
7f2e8c58 RA |
418 | * @cd: Clock Domain of timing parameter. |
419 | * @shift: Parameter value left shifts @shift, which is then printed instead of value. | |
563dbb26 RA |
420 | * @raw: Raw Format Option. |
421 | * raw format: gpmc,name = <value> | |
422 | * tick format: gpmc,name = <value> /‍* x ns -- y ns; x ticks *‍/ | |
423 | * Where x ns -- y ns result in the same tick value. | |
4b613e9b | 424 | * When @max is exceeded, "invalid" is printed inside comment. |
563dbb26 | 425 | * @noval: Parameter values equal to 0 are not printed. |
563dbb26 RA |
426 | * @return: Specified timing parameter (after optional @shift). |
427 | * | |
428 | */ | |
7f2e8c58 RA |
429 | static int get_gpmc_timing_reg( |
430 | /* timing specifiers */ | |
4b613e9b | 431 | int cs, int reg, int st_bit, int end_bit, int max, |
7f2e8c58 RA |
432 | const char *name, const enum gpmc_clk_domain cd, |
433 | /* value transform */ | |
434 | int shift, | |
435 | /* format specifiers */ | |
436 | bool raw, bool noval) | |
35ac051e TL |
437 | { |
438 | u32 l; | |
563dbb26 RA |
439 | int nr_bits; |
440 | int mask; | |
4b613e9b | 441 | bool invalid; |
35ac051e TL |
442 | |
443 | l = gpmc_cs_read_reg(cs, reg); | |
444 | nr_bits = end_bit - st_bit + 1; | |
563dbb26 RA |
445 | mask = (1 << nr_bits) - 1; |
446 | l = (l >> st_bit) & mask; | |
4b613e9b RA |
447 | if (!max) |
448 | max = mask; | |
449 | invalid = l > max; | |
35ac051e TL |
450 | if (shift) |
451 | l = (shift << l); | |
452 | if (noval && (l == 0)) | |
453 | return 0; | |
454 | if (!raw) { | |
563dbb26 RA |
455 | /* DTS tick format for timings in ns */ |
456 | unsigned int time_ns; | |
457 | unsigned int time_ns_min = 0; | |
35ac051e | 458 | |
563dbb26 | 459 | if (l) |
7f2e8c58 RA |
460 | time_ns_min = gpmc_clk_ticks_to_ns(l - 1, cs, cd) + 1; |
461 | time_ns = gpmc_clk_ticks_to_ns(l, cs, cd); | |
4b613e9b RA |
462 | pr_info("gpmc,%s = <%u> /* %u ns - %u ns; %i ticks%s*/\n", |
463 | name, time_ns, time_ns_min, time_ns, l, | |
464 | invalid ? "; invalid " : " "); | |
35ac051e | 465 | } else { |
563dbb26 | 466 | /* raw format */ |
4b613e9b RA |
467 | pr_info("gpmc,%s = <%u>%s\n", name, l, |
468 | invalid ? " /* invalid */" : ""); | |
35ac051e TL |
469 | } |
470 | ||
471 | return l; | |
472 | } | |
473 | ||
474 | #define GPMC_PRINT_CONFIG(cs, config) \ | |
475 | pr_info("cs%i %s: 0x%08x\n", cs, #config, \ | |
476 | gpmc_cs_read_reg(cs, config)) | |
477 | #define GPMC_GET_RAW(reg, st, end, field) \ | |
4b613e9b RA |
478 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 0) |
479 | #define GPMC_GET_RAW_MAX(reg, st, end, max, field) \ | |
480 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, 0, 1, 0) | |
35ac051e | 481 | #define GPMC_GET_RAW_BOOL(reg, st, end, field) \ |
4b613e9b RA |
482 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 1) |
483 | #define GPMC_GET_RAW_SHIFT_MAX(reg, st, end, shift, max, field) \ | |
484 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, (shift), 1, 1) | |
35ac051e | 485 | #define GPMC_GET_TICKS(reg, st, end, field) \ |
4b613e9b | 486 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 0, 0) |
7f2e8c58 | 487 | #define GPMC_GET_TICKS_CD(reg, st, end, field, cd) \ |
4b613e9b RA |
488 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, (cd), 0, 0, 0) |
489 | #define GPMC_GET_TICKS_CD_MAX(reg, st, end, max, field, cd) \ | |
490 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, (cd), 0, 0, 0) | |
35ac051e TL |
491 | |
492 | static void gpmc_show_regs(int cs, const char *desc) | |
493 | { | |
494 | pr_info("gpmc cs%i %s:\n", cs, desc); | |
495 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG1); | |
496 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG2); | |
497 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG3); | |
498 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG4); | |
499 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG5); | |
500 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG6); | |
501 | } | |
502 | ||
503 | /* | |
504 | * Note that gpmc,wait-pin handing wrongly assumes bit 8 is available, | |
505 | * see commit c9fb809. | |
506 | */ | |
507 | static void gpmc_cs_show_timings(int cs, const char *desc) | |
508 | { | |
509 | gpmc_show_regs(cs, desc); | |
510 | ||
511 | pr_info("gpmc cs%i access configuration:\n", cs); | |
512 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 4, 4, "time-para-granularity"); | |
513 | GPMC_GET_RAW(GPMC_CS_CONFIG1, 8, 9, "mux-add-data"); | |
4b613e9b RA |
514 | GPMC_GET_RAW_MAX(GPMC_CS_CONFIG1, 12, 13, |
515 | GPMC_CONFIG1_DEVICESIZE_MAX, "device-width"); | |
35ac051e TL |
516 | GPMC_GET_RAW(GPMC_CS_CONFIG1, 16, 17, "wait-pin"); |
517 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 21, 21, "wait-on-write"); | |
518 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 22, 22, "wait-on-read"); | |
4b613e9b RA |
519 | GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 23, 24, 4, |
520 | GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX, | |
521 | "burst-length"); | |
35ac051e TL |
522 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 27, 27, "sync-write"); |
523 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 28, 28, "burst-write"); | |
524 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 29, 29, "gpmc,sync-read"); | |
525 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 30, 30, "burst-read"); | |
526 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 31, 31, "burst-wrap"); | |
527 | ||
528 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG2, 7, 7, "cs-extra-delay"); | |
529 | ||
530 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG3, 7, 7, "adv-extra-delay"); | |
531 | ||
532 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 23, 23, "we-extra-delay"); | |
533 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 7, 7, "oe-extra-delay"); | |
534 | ||
535 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 7, 7, "cycle2cycle-samecsen"); | |
536 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 6, 6, "cycle2cycle-diffcsen"); | |
537 | ||
538 | pr_info("gpmc cs%i timings configuration:\n", cs); | |
539 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 0, 3, "cs-on-ns"); | |
540 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 8, 12, "cs-rd-off-ns"); | |
541 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 16, 20, "cs-wr-off-ns"); | |
542 | ||
543 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 0, 3, "adv-on-ns"); | |
544 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 8, 12, "adv-rd-off-ns"); | |
545 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 16, 20, "adv-wr-off-ns"); | |
2c92c04b NA |
546 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
547 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 4, 6, "adv-aad-mux-on-ns"); | |
548 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 24, 26, | |
549 | "adv-aad-mux-rd-off-ns"); | |
550 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 28, 30, | |
551 | "adv-aad-mux-wr-off-ns"); | |
552 | } | |
35ac051e TL |
553 | |
554 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 0, 3, "oe-on-ns"); | |
555 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 8, 12, "oe-off-ns"); | |
2c92c04b NA |
556 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
557 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 4, 6, "oe-aad-mux-on-ns"); | |
558 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 13, 15, "oe-aad-mux-off-ns"); | |
559 | } | |
35ac051e TL |
560 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 16, 19, "we-on-ns"); |
561 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 24, 28, "we-off-ns"); | |
562 | ||
563 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 0, 4, "rd-cycle-ns"); | |
564 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 8, 12, "wr-cycle-ns"); | |
565 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 16, 20, "access-ns"); | |
566 | ||
567 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 24, 27, "page-burst-access-ns"); | |
568 | ||
569 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 0, 3, "bus-turnaround-ns"); | |
570 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 8, 11, "cycle2cycle-delay-ns"); | |
571 | ||
4b613e9b RA |
572 | GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 18, 19, |
573 | GPMC_CONFIG1_WAITMONITORINGTIME_MAX, | |
574 | "wait-monitoring-ns", GPMC_CD_CLK); | |
575 | GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 25, 26, | |
576 | GPMC_CONFIG1_CLKACTIVATIONTIME_MAX, | |
577 | "clk-activation-ns", GPMC_CD_FCLK); | |
35ac051e TL |
578 | |
579 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 16, 19, "wr-data-mux-bus-ns"); | |
580 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 24, 28, "wr-access-ns"); | |
581 | } | |
4bbbc1ad | 582 | #else |
35ac051e TL |
583 | static inline void gpmc_cs_show_timings(int cs, const char *desc) |
584 | { | |
585 | } | |
4bbbc1ad | 586 | #endif |
35ac051e | 587 | |
7f2e8c58 RA |
588 | /** |
589 | * set_gpmc_timing_reg - set a single timing parameter for Chip Select Region. | |
590 | * Caller is expected to have initialized CONFIG1 GPMCFCLKDIVIDER | |
591 | * prior to calling this function with @cd equal to GPMC_CD_CLK. | |
592 | * | |
593 | * @cs: Chip Select Region. | |
594 | * @reg: GPMC_CS_CONFIGn register offset. | |
595 | * @st_bit: Start Bit | |
596 | * @end_bit: End Bit. Must be >= @st_bit. | |
4b613e9b RA |
597 | * @max: Maximum parameter value. |
598 | * If 0, maximum is as high as @st_bit and @end_bit allow. | |
7f2e8c58 RA |
599 | * @time: Timing parameter in ns. |
600 | * @cd: Timing parameter clock domain. | |
601 | * @name: Timing parameter name. | |
602 | * @return: 0 on success, -1 on error. | |
603 | */ | |
4b613e9b | 604 | static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, int max, |
7f2e8c58 | 605 | int time, enum gpmc_clk_domain cd, const char *name) |
4bbbc1ad JY |
606 | { |
607 | u32 l; | |
608 | int ticks, mask, nr_bits; | |
609 | ||
610 | if (time == 0) | |
611 | ticks = 0; | |
612 | else | |
7f2e8c58 | 613 | ticks = gpmc_ns_to_clk_ticks(time, cs, cd); |
4bbbc1ad | 614 | nr_bits = end_bit - st_bit + 1; |
80323742 RQ |
615 | mask = (1 << nr_bits) - 1; |
616 | ||
4b613e9b RA |
617 | if (!max) |
618 | max = mask; | |
619 | ||
620 | if (ticks > max) { | |
7f2e8c58 | 621 | pr_err("%s: GPMC CS%d: %s %d ns, %d ticks > %d ticks\n", |
4b613e9b | 622 | __func__, cs, name, time, ticks, max); |
80323742 | 623 | |
4bbbc1ad | 624 | return -1; |
1c22cc13 | 625 | } |
4bbbc1ad | 626 | |
4bbbc1ad | 627 | l = gpmc_cs_read_reg(cs, reg); |
63aa945b | 628 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
f585070b | 629 | pr_info( |
2affc816 | 630 | "GPMC CS%d: %-17s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n", |
7f2e8c58 | 631 | cs, name, ticks, gpmc_get_clk_period(cs, cd) * ticks / 1000, |
1c22cc13 | 632 | (l >> st_bit) & mask, time); |
4bbbc1ad JY |
633 | #endif |
634 | l &= ~(mask << st_bit); | |
635 | l |= ticks << st_bit; | |
636 | gpmc_cs_write_reg(cs, reg, l); | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
4b613e9b RA |
641 | #define GPMC_SET_ONE_CD_MAX(reg, st, end, max, field, cd) \ |
642 | if (set_gpmc_timing_reg(cs, (reg), (st), (end), (max), \ | |
643 | t->field, (cd), #field) < 0) \ | |
4bbbc1ad | 644 | return -1 |
4bbbc1ad | 645 | |
7f2e8c58 | 646 | #define GPMC_SET_ONE(reg, st, end, field) \ |
4b613e9b | 647 | GPMC_SET_ONE_CD_MAX(reg, st, end, 0, field, GPMC_CD_FCLK) |
7f2e8c58 | 648 | |
2e676901 RA |
649 | /** |
650 | * gpmc_calc_waitmonitoring_divider - calculate proper GPMCFCLKDIVIDER based on WAITMONITORINGTIME | |
651 | * WAITMONITORINGTIME will be _at least_ as long as desired, i.e. | |
652 | * read --> don't sample bus too early | |
653 | * write --> data is longer on bus | |
654 | * | |
655 | * Formula: | |
656 | * gpmc_clk_div + 1 = ceil(ceil(waitmonitoringtime_ns / gpmc_fclk_ns) | |
657 | * / waitmonitoring_ticks) | |
658 | * WAITMONITORINGTIME resulting in 0 or 1 tick with div = 1 are caught by | |
659 | * div <= 0 check. | |
660 | * | |
661 | * @wait_monitoring: WAITMONITORINGTIME in ns. | |
662 | * @return: -1 on failure to scale, else proper divider > 0. | |
663 | */ | |
664 | static int gpmc_calc_waitmonitoring_divider(unsigned int wait_monitoring) | |
665 | { | |
666 | ||
667 | int div = gpmc_ns_to_ticks(wait_monitoring); | |
668 | ||
669 | div += GPMC_CONFIG1_WAITMONITORINGTIME_MAX - 1; | |
670 | div /= GPMC_CONFIG1_WAITMONITORINGTIME_MAX; | |
671 | ||
672 | if (div > 4) | |
673 | return -1; | |
674 | if (div <= 0) | |
675 | div = 1; | |
676 | ||
677 | return div; | |
678 | ||
679 | } | |
680 | ||
681 | /** | |
682 | * gpmc_calc_divider - calculate GPMC_FCLK divider for sync_clk GPMC_CLK period. | |
683 | * @sync_clk: GPMC_CLK period in ps. | |
684 | * @return: Returns at least 1 if GPMC_FCLK can be divided to GPMC_CLK. | |
685 | * Else, returns -1. | |
686 | */ | |
1b47ca1a | 687 | int gpmc_calc_divider(unsigned int sync_clk) |
4bbbc1ad | 688 | { |
2e676901 | 689 | int div = gpmc_ps_to_ticks(sync_clk); |
4bbbc1ad | 690 | |
4bbbc1ad JY |
691 | if (div > 4) |
692 | return -1; | |
1c22cc13 | 693 | if (div <= 0) |
4bbbc1ad JY |
694 | div = 1; |
695 | ||
696 | return div; | |
697 | } | |
698 | ||
2e676901 RA |
699 | /** |
700 | * gpmc_cs_set_timings - program timing parameters for Chip Select Region. | |
701 | * @cs: Chip Select Region. | |
702 | * @t: GPMC timing parameters. | |
703 | * @s: GPMC timing settings. | |
704 | * @return: 0 on success, -1 on error. | |
705 | */ | |
706 | int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t, | |
707 | const struct gpmc_settings *s) | |
4bbbc1ad JY |
708 | { |
709 | int div; | |
710 | u32 l; | |
711 | ||
1b47ca1a | 712 | div = gpmc_calc_divider(t->sync_clk); |
4bbbc1ad | 713 | if (div < 0) |
a032d33b | 714 | return div; |
4bbbc1ad | 715 | |
2e676901 RA |
716 | /* |
717 | * See if we need to change the divider for waitmonitoringtime. | |
718 | * | |
719 | * Calculate GPMCFCLKDIVIDER independent of gpmc,sync-clk-ps in DT for | |
720 | * pure asynchronous accesses, i.e. both read and write asynchronous. | |
721 | * However, only do so if WAITMONITORINGTIME is actually used, i.e. | |
722 | * either WAITREADMONITORING or WAITWRITEMONITORING is set. | |
723 | * | |
724 | * This statement must not change div to scale async WAITMONITORINGTIME | |
725 | * to protect mixed synchronous and asynchronous accesses. | |
726 | * | |
727 | * We raise an error later if WAITMONITORINGTIME does not fit. | |
728 | */ | |
729 | if (!s->sync_read && !s->sync_write && | |
730 | (s->wait_on_read || s->wait_on_write) | |
731 | ) { | |
732 | ||
733 | div = gpmc_calc_waitmonitoring_divider(t->wait_monitoring); | |
734 | if (div < 0) { | |
735 | pr_err("%s: waitmonitoringtime %3d ns too large for greatest gpmcfclkdivider.\n", | |
736 | __func__, | |
737 | t->wait_monitoring | |
738 | ); | |
739 | return -1; | |
740 | } | |
741 | } | |
742 | ||
4bbbc1ad JY |
743 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on); |
744 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off); | |
745 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off); | |
746 | ||
747 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on); | |
748 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off); | |
749 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off); | |
2c92c04b NA |
750 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
751 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 4, 6, adv_aad_mux_on); | |
752 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 24, 26, adv_aad_mux_rd_off); | |
753 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 28, 30, adv_aad_mux_wr_off); | |
754 | } | |
4bbbc1ad JY |
755 | |
756 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on); | |
757 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off); | |
2c92c04b NA |
758 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
759 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 4, 6, oe_aad_mux_on); | |
760 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 13, 15, oe_aad_mux_off); | |
761 | } | |
4bbbc1ad JY |
762 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on); |
763 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off); | |
764 | ||
765 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle); | |
766 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle); | |
767 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access); | |
768 | ||
769 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access); | |
770 | ||
559d94b0 AM |
771 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround); |
772 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay); | |
773 | ||
da496873 | 774 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) |
cc26b3b0 | 775 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus); |
da496873 | 776 | if (gpmc_capability & GPMC_HAS_WR_ACCESS) |
cc26b3b0 | 777 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access); |
cc26b3b0 | 778 | |
1c22cc13 | 779 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); |
7f2e8c58 RA |
780 | l &= ~0x03; |
781 | l |= (div - 1); | |
782 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); | |
783 | ||
4b613e9b RA |
784 | GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 18, 19, |
785 | GPMC_CONFIG1_WAITMONITORINGTIME_MAX, | |
786 | wait_monitoring, GPMC_CD_CLK); | |
787 | GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 25, 26, | |
788 | GPMC_CONFIG1_CLKACTIVATIONTIME_MAX, | |
789 | clk_activation, GPMC_CD_FCLK); | |
7f2e8c58 | 790 | |
63aa945b | 791 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
f585070b RA |
792 | pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n", |
793 | cs, (div * gpmc_get_fclk_period()) / 1000, div); | |
4bbbc1ad | 794 | #endif |
4bbbc1ad | 795 | |
559d94b0 | 796 | gpmc_cs_bool_timings(cs, &t->bool_timings); |
35ac051e | 797 | gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings"); |
559d94b0 | 798 | |
4bbbc1ad JY |
799 | return 0; |
800 | } | |
801 | ||
4cf27d2e | 802 | static int gpmc_cs_set_memconf(int cs, u32 base, u32 size) |
f37e4580 ID |
803 | { |
804 | u32 l; | |
805 | u32 mask; | |
806 | ||
c71f8e9b JH |
807 | /* |
808 | * Ensure that base address is aligned on a | |
809 | * boundary equal to or greater than size. | |
810 | */ | |
811 | if (base & (size - 1)) | |
812 | return -EINVAL; | |
813 | ||
9c4f757e | 814 | base >>= GPMC_CHUNK_SHIFT; |
f37e4580 | 815 | mask = (1 << GPMC_SECTION_SHIFT) - size; |
9c4f757e SP |
816 | mask >>= GPMC_CHUNK_SHIFT; |
817 | mask <<= GPMC_CONFIG7_MASKADDRESS_OFFSET; | |
818 | ||
f37e4580 | 819 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
9c4f757e SP |
820 | l &= ~GPMC_CONFIG7_MASK; |
821 | l |= base & GPMC_CONFIG7_BASEADDRESS_MASK; | |
822 | l |= mask & GPMC_CONFIG7_MASKADDRESS_MASK; | |
a2d3e7ba | 823 | l |= GPMC_CONFIG7_CSVALID; |
f37e4580 | 824 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
c71f8e9b JH |
825 | |
826 | return 0; | |
f37e4580 ID |
827 | } |
828 | ||
4cf27d2e RQ |
829 | static void gpmc_cs_enable_mem(int cs) |
830 | { | |
831 | u32 l; | |
832 | ||
833 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
834 | l |= GPMC_CONFIG7_CSVALID; | |
835 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); | |
836 | } | |
837 | ||
f37e4580 ID |
838 | static void gpmc_cs_disable_mem(int cs) |
839 | { | |
840 | u32 l; | |
841 | ||
842 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 843 | l &= ~GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
844 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
845 | } | |
846 | ||
847 | static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size) | |
848 | { | |
849 | u32 l; | |
850 | u32 mask; | |
851 | ||
852 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
853 | *base = (l & 0x3f) << GPMC_CHUNK_SHIFT; | |
854 | mask = (l >> 8) & 0x0f; | |
855 | *size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT); | |
856 | } | |
857 | ||
858 | static int gpmc_cs_mem_enabled(int cs) | |
859 | { | |
860 | u32 l; | |
861 | ||
862 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 863 | return l & GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
864 | } |
865 | ||
f5d8edaf | 866 | static void gpmc_cs_set_reserved(int cs, int reserved) |
4bbbc1ad | 867 | { |
9ed7a776 TL |
868 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
869 | ||
870 | gpmc->flags |= GPMC_CS_RESERVED; | |
f37e4580 ID |
871 | } |
872 | ||
ae9d908a | 873 | static bool gpmc_cs_reserved(int cs) |
f37e4580 | 874 | { |
9ed7a776 TL |
875 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
876 | ||
877 | return gpmc->flags & GPMC_CS_RESERVED; | |
878 | } | |
879 | ||
880 | static void gpmc_cs_set_name(int cs, const char *name) | |
881 | { | |
882 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; | |
883 | ||
884 | gpmc->name = name; | |
885 | } | |
886 | ||
2e25b0ec | 887 | static const char *gpmc_cs_get_name(int cs) |
9ed7a776 TL |
888 | { |
889 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; | |
890 | ||
891 | return gpmc->name; | |
f37e4580 ID |
892 | } |
893 | ||
894 | static unsigned long gpmc_mem_align(unsigned long size) | |
895 | { | |
896 | int order; | |
897 | ||
898 | size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1); | |
899 | order = GPMC_CHUNK_SHIFT - 1; | |
900 | do { | |
901 | size >>= 1; | |
902 | order++; | |
903 | } while (size); | |
904 | size = 1 << order; | |
905 | return size; | |
906 | } | |
907 | ||
908 | static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size) | |
909 | { | |
9ed7a776 TL |
910 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
911 | struct resource *res = &gpmc->mem; | |
f37e4580 ID |
912 | int r; |
913 | ||
914 | size = gpmc_mem_align(size); | |
915 | spin_lock(&gpmc_mem_lock); | |
916 | res->start = base; | |
917 | res->end = base + size - 1; | |
918 | r = request_resource(&gpmc_mem_root, res); | |
919 | spin_unlock(&gpmc_mem_lock); | |
920 | ||
921 | return r; | |
922 | } | |
923 | ||
da496873 AM |
924 | static int gpmc_cs_delete_mem(int cs) |
925 | { | |
9ed7a776 TL |
926 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
927 | struct resource *res = &gpmc->mem; | |
da496873 AM |
928 | int r; |
929 | ||
930 | spin_lock(&gpmc_mem_lock); | |
efe80723 | 931 | r = release_resource(res); |
da496873 AM |
932 | res->start = 0; |
933 | res->end = 0; | |
934 | spin_unlock(&gpmc_mem_lock); | |
935 | ||
936 | return r; | |
937 | } | |
938 | ||
cdd6928c JH |
939 | /** |
940 | * gpmc_cs_remap - remaps a chip-select physical base address | |
941 | * @cs: chip-select to remap | |
942 | * @base: physical base address to re-map chip-select to | |
943 | * | |
944 | * Re-maps a chip-select to a new physical base address specified by | |
945 | * "base". Returns 0 on success and appropriate negative error code | |
946 | * on failure. | |
947 | */ | |
948 | static int gpmc_cs_remap(int cs, u32 base) | |
949 | { | |
950 | int ret; | |
951 | u32 old_base, size; | |
952 | ||
f34f3716 GP |
953 | if (cs > gpmc_cs_num) { |
954 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
cdd6928c | 955 | return -ENODEV; |
f34f3716 | 956 | } |
fb677ef7 TL |
957 | |
958 | /* | |
959 | * Make sure we ignore any device offsets from the GPMC partition | |
960 | * allocated for the chip select and that the new base confirms | |
961 | * to the GPMC 16MB minimum granularity. | |
962 | */ | |
963 | base &= ~(SZ_16M - 1); | |
964 | ||
cdd6928c JH |
965 | gpmc_cs_get_memconf(cs, &old_base, &size); |
966 | if (base == old_base) | |
967 | return 0; | |
4cf27d2e | 968 | |
cdd6928c JH |
969 | ret = gpmc_cs_delete_mem(cs); |
970 | if (ret < 0) | |
971 | return ret; | |
4cf27d2e | 972 | |
cdd6928c | 973 | ret = gpmc_cs_insert_mem(cs, base, size); |
c71f8e9b JH |
974 | if (ret < 0) |
975 | return ret; | |
cdd6928c | 976 | |
4cf27d2e RQ |
977 | ret = gpmc_cs_set_memconf(cs, base, size); |
978 | ||
979 | return ret; | |
cdd6928c JH |
980 | } |
981 | ||
f37e4580 ID |
982 | int gpmc_cs_request(int cs, unsigned long size, unsigned long *base) |
983 | { | |
9ed7a776 TL |
984 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
985 | struct resource *res = &gpmc->mem; | |
f37e4580 ID |
986 | int r = -1; |
987 | ||
f34f3716 GP |
988 | if (cs > gpmc_cs_num) { |
989 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
f37e4580 | 990 | return -ENODEV; |
f34f3716 | 991 | } |
f37e4580 ID |
992 | size = gpmc_mem_align(size); |
993 | if (size > (1 << GPMC_SECTION_SHIFT)) | |
994 | return -ENOMEM; | |
995 | ||
996 | spin_lock(&gpmc_mem_lock); | |
997 | if (gpmc_cs_reserved(cs)) { | |
998 | r = -EBUSY; | |
999 | goto out; | |
1000 | } | |
1001 | if (gpmc_cs_mem_enabled(cs)) | |
1002 | r = adjust_resource(res, res->start & ~(size - 1), size); | |
1003 | if (r < 0) | |
1004 | r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0, | |
1005 | size, NULL, NULL); | |
1006 | if (r < 0) | |
1007 | goto out; | |
1008 | ||
4cf27d2e RQ |
1009 | /* Disable CS while changing base address and size mask */ |
1010 | gpmc_cs_disable_mem(cs); | |
1011 | ||
1012 | r = gpmc_cs_set_memconf(cs, res->start, resource_size(res)); | |
c71f8e9b JH |
1013 | if (r < 0) { |
1014 | release_resource(res); | |
1015 | goto out; | |
1016 | } | |
1017 | ||
4cf27d2e RQ |
1018 | /* Enable CS */ |
1019 | gpmc_cs_enable_mem(cs); | |
f37e4580 ID |
1020 | *base = res->start; |
1021 | gpmc_cs_set_reserved(cs, 1); | |
1022 | out: | |
1023 | spin_unlock(&gpmc_mem_lock); | |
1024 | return r; | |
1025 | } | |
fd1dc87d | 1026 | EXPORT_SYMBOL(gpmc_cs_request); |
f37e4580 ID |
1027 | |
1028 | void gpmc_cs_free(int cs) | |
1029 | { | |
9ed7a776 TL |
1030 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
1031 | struct resource *res = &gpmc->mem; | |
efe80723 | 1032 | |
f37e4580 | 1033 | spin_lock(&gpmc_mem_lock); |
f34f3716 | 1034 | if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) { |
f37e4580 ID |
1035 | printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs); |
1036 | BUG(); | |
1037 | spin_unlock(&gpmc_mem_lock); | |
1038 | return; | |
1039 | } | |
1040 | gpmc_cs_disable_mem(cs); | |
efe80723 TL |
1041 | if (res->flags) |
1042 | release_resource(res); | |
f37e4580 ID |
1043 | gpmc_cs_set_reserved(cs, 0); |
1044 | spin_unlock(&gpmc_mem_lock); | |
1045 | } | |
fd1dc87d | 1046 | EXPORT_SYMBOL(gpmc_cs_free); |
f37e4580 | 1047 | |
948d38e7 | 1048 | /** |
3a544354 | 1049 | * gpmc_configure - write request to configure gpmc |
948d38e7 SG |
1050 | * @cmd: command type |
1051 | * @wval: value to write | |
1052 | * @return status of the operation | |
1053 | */ | |
3a544354 | 1054 | int gpmc_configure(int cmd, int wval) |
948d38e7 | 1055 | { |
3a544354 | 1056 | u32 regval; |
948d38e7 SG |
1057 | |
1058 | switch (cmd) { | |
db97eb7d SG |
1059 | case GPMC_ENABLE_IRQ: |
1060 | gpmc_write_reg(GPMC_IRQENABLE, wval); | |
1061 | break; | |
1062 | ||
948d38e7 SG |
1063 | case GPMC_SET_IRQ_STATUS: |
1064 | gpmc_write_reg(GPMC_IRQSTATUS, wval); | |
1065 | break; | |
1066 | ||
1067 | case GPMC_CONFIG_WP: | |
1068 | regval = gpmc_read_reg(GPMC_CONFIG); | |
1069 | if (wval) | |
1070 | regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */ | |
1071 | else | |
1072 | regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */ | |
1073 | gpmc_write_reg(GPMC_CONFIG, regval); | |
1074 | break; | |
1075 | ||
948d38e7 | 1076 | default: |
3a544354 JH |
1077 | pr_err("%s: command not supported\n", __func__); |
1078 | return -EINVAL; | |
948d38e7 SG |
1079 | } |
1080 | ||
3a544354 | 1081 | return 0; |
948d38e7 | 1082 | } |
3a544354 | 1083 | EXPORT_SYMBOL(gpmc_configure); |
948d38e7 | 1084 | |
52bd138d AM |
1085 | void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs) |
1086 | { | |
2fdf0c98 AM |
1087 | int i; |
1088 | ||
52bd138d AM |
1089 | reg->gpmc_status = gpmc_base + GPMC_STATUS; |
1090 | reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET + | |
1091 | GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs; | |
1092 | reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET + | |
1093 | GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs; | |
1094 | reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET + | |
1095 | GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs; | |
1096 | reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1; | |
1097 | reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2; | |
1098 | reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL; | |
1099 | reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS; | |
1100 | reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG; | |
1101 | reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL; | |
1102 | reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG; | |
1103 | reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT; | |
2fdf0c98 AM |
1104 | |
1105 | for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) { | |
1106 | reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 + | |
1107 | GPMC_BCH_SIZE * i; | |
1108 | reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 + | |
1109 | GPMC_BCH_SIZE * i; | |
1110 | reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 + | |
1111 | GPMC_BCH_SIZE * i; | |
1112 | reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 + | |
1113 | GPMC_BCH_SIZE * i; | |
27c9fd60 | 1114 | reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 + |
1115 | i * GPMC_BCH_SIZE; | |
1116 | reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 + | |
1117 | i * GPMC_BCH_SIZE; | |
1118 | reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 + | |
1119 | i * GPMC_BCH_SIZE; | |
2fdf0c98 | 1120 | } |
52bd138d AM |
1121 | } |
1122 | ||
512d73d1 RQ |
1123 | static bool gpmc_nand_writebuffer_empty(void) |
1124 | { | |
1125 | if (gpmc_read_reg(GPMC_STATUS) & GPMC_STATUS_EMPTYWRITEBUFFERSTATUS) | |
1126 | return true; | |
1127 | ||
1128 | return false; | |
1129 | } | |
1130 | ||
1131 | static struct gpmc_nand_ops nand_ops = { | |
1132 | .nand_writebuffer_empty = gpmc_nand_writebuffer_empty, | |
1133 | }; | |
f47fcad6 RQ |
1134 | |
1135 | /** | |
1136 | * gpmc_omap_get_nand_ops - Get the GPMC NAND interface | |
1137 | * @regs: the GPMC NAND register map exclusive for NAND use. | |
1138 | * @cs: GPMC chip select number on which the NAND sits. The | |
1139 | * register map returned will be specific to this chip select. | |
1140 | * | |
1141 | * Returns NULL on error e.g. invalid cs. | |
1142 | */ | |
1143 | struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *reg, int cs) | |
1144 | { | |
1145 | if (cs >= gpmc_cs_num) | |
1146 | return NULL; | |
1147 | ||
1148 | gpmc_update_nand_reg(reg, cs); | |
1149 | ||
1150 | return &nand_ops; | |
1151 | } | |
1152 | EXPORT_SYMBOL_GPL(gpmc_omap_get_nand_ops); | |
1153 | ||
6b6c32fc AM |
1154 | int gpmc_get_client_irq(unsigned irq_config) |
1155 | { | |
1156 | int i; | |
1157 | ||
1158 | if (hweight32(irq_config) > 1) | |
1159 | return 0; | |
1160 | ||
1161 | for (i = 0; i < GPMC_NR_IRQ; i++) | |
1162 | if (gpmc_client_irq[i].bitmask & irq_config) | |
1163 | return gpmc_client_irq[i].irq; | |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | static int gpmc_irq_endis(unsigned irq, bool endis) | |
1169 | { | |
1170 | int i; | |
1171 | u32 regval; | |
1172 | ||
1173 | for (i = 0; i < GPMC_NR_IRQ; i++) | |
1174 | if (irq == gpmc_client_irq[i].irq) { | |
1175 | regval = gpmc_read_reg(GPMC_IRQENABLE); | |
1176 | if (endis) | |
1177 | regval |= gpmc_client_irq[i].bitmask; | |
1178 | else | |
1179 | regval &= ~gpmc_client_irq[i].bitmask; | |
1180 | gpmc_write_reg(GPMC_IRQENABLE, regval); | |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static void gpmc_irq_disable(struct irq_data *p) | |
1188 | { | |
1189 | gpmc_irq_endis(p->irq, false); | |
1190 | } | |
1191 | ||
1192 | static void gpmc_irq_enable(struct irq_data *p) | |
1193 | { | |
1194 | gpmc_irq_endis(p->irq, true); | |
1195 | } | |
1196 | ||
1197 | static void gpmc_irq_noop(struct irq_data *data) { } | |
1198 | ||
1199 | static unsigned int gpmc_irq_noop_ret(struct irq_data *data) { return 0; } | |
1200 | ||
da496873 | 1201 | static int gpmc_setup_irq(void) |
6b6c32fc AM |
1202 | { |
1203 | int i; | |
1204 | u32 regval; | |
1205 | ||
1206 | if (!gpmc_irq) | |
1207 | return -EINVAL; | |
1208 | ||
1209 | gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0); | |
71856843 | 1210 | if (gpmc_irq_start < 0) { |
6b6c32fc AM |
1211 | pr_err("irq_alloc_descs failed\n"); |
1212 | return gpmc_irq_start; | |
1213 | } | |
1214 | ||
1215 | gpmc_irq_chip.name = "gpmc"; | |
1216 | gpmc_irq_chip.irq_startup = gpmc_irq_noop_ret; | |
1217 | gpmc_irq_chip.irq_enable = gpmc_irq_enable; | |
1218 | gpmc_irq_chip.irq_disable = gpmc_irq_disable; | |
1219 | gpmc_irq_chip.irq_shutdown = gpmc_irq_noop; | |
1220 | gpmc_irq_chip.irq_ack = gpmc_irq_noop; | |
1221 | gpmc_irq_chip.irq_mask = gpmc_irq_noop; | |
1222 | gpmc_irq_chip.irq_unmask = gpmc_irq_noop; | |
1223 | ||
1224 | gpmc_client_irq[0].bitmask = GPMC_IRQ_FIFOEVENTENABLE; | |
1225 | gpmc_client_irq[1].bitmask = GPMC_IRQ_COUNT_EVENT; | |
1226 | ||
1227 | for (i = 0; i < GPMC_NR_IRQ; i++) { | |
1228 | gpmc_client_irq[i].irq = gpmc_irq_start + i; | |
1229 | irq_set_chip_and_handler(gpmc_client_irq[i].irq, | |
1230 | &gpmc_irq_chip, handle_simple_irq); | |
ed293d1a RH |
1231 | irq_modify_status(gpmc_client_irq[i].irq, IRQ_NOREQUEST, |
1232 | IRQ_NOAUTOEN); | |
6b6c32fc AM |
1233 | } |
1234 | ||
1235 | /* Disable interrupts */ | |
1236 | gpmc_write_reg(GPMC_IRQENABLE, 0); | |
1237 | ||
1238 | /* clear interrupts */ | |
1239 | regval = gpmc_read_reg(GPMC_IRQSTATUS); | |
1240 | gpmc_write_reg(GPMC_IRQSTATUS, regval); | |
1241 | ||
1242 | return request_irq(gpmc_irq, gpmc_handle_irq, 0, "gpmc", NULL); | |
1243 | } | |
1244 | ||
351a102d | 1245 | static int gpmc_free_irq(void) |
da496873 AM |
1246 | { |
1247 | int i; | |
1248 | ||
1249 | if (gpmc_irq) | |
1250 | free_irq(gpmc_irq, NULL); | |
1251 | ||
1252 | for (i = 0; i < GPMC_NR_IRQ; i++) { | |
1253 | irq_set_handler(gpmc_client_irq[i].irq, NULL); | |
1254 | irq_set_chip(gpmc_client_irq[i].irq, &no_irq_chip); | |
da496873 AM |
1255 | } |
1256 | ||
1257 | irq_free_descs(gpmc_irq_start, GPMC_NR_IRQ); | |
1258 | ||
1259 | return 0; | |
1260 | } | |
1261 | ||
351a102d | 1262 | static void gpmc_mem_exit(void) |
da496873 AM |
1263 | { |
1264 | int cs; | |
1265 | ||
f34f3716 | 1266 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
da496873 AM |
1267 | if (!gpmc_cs_mem_enabled(cs)) |
1268 | continue; | |
1269 | gpmc_cs_delete_mem(cs); | |
1270 | } | |
1271 | ||
1272 | } | |
1273 | ||
84b00f0e | 1274 | static void gpmc_mem_init(void) |
f37e4580 | 1275 | { |
84b00f0e | 1276 | int cs; |
f37e4580 | 1277 | |
bf234397 JH |
1278 | /* |
1279 | * The first 1MB of GPMC address space is typically mapped to | |
1280 | * the internal ROM. Never allocate the first page, to | |
1281 | * facilitate bug detection; even if we didn't boot from ROM. | |
7f245162 | 1282 | */ |
bf234397 | 1283 | gpmc_mem_root.start = SZ_1M; |
f37e4580 ID |
1284 | gpmc_mem_root.end = GPMC_MEM_END; |
1285 | ||
1286 | /* Reserve all regions that has been set up by bootloader */ | |
f34f3716 | 1287 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
f37e4580 ID |
1288 | u32 base, size; |
1289 | ||
1290 | if (!gpmc_cs_mem_enabled(cs)) | |
1291 | continue; | |
1292 | gpmc_cs_get_memconf(cs, &base, &size); | |
84b00f0e JH |
1293 | if (gpmc_cs_insert_mem(cs, base, size)) { |
1294 | pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n", | |
1295 | __func__, cs, base, base + size); | |
1296 | gpmc_cs_disable_mem(cs); | |
8119024e | 1297 | } |
f37e4580 | 1298 | } |
4bbbc1ad JY |
1299 | } |
1300 | ||
246da26d AM |
1301 | static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk) |
1302 | { | |
1303 | u32 temp; | |
1304 | int div; | |
1305 | ||
1306 | div = gpmc_calc_divider(sync_clk); | |
1307 | temp = gpmc_ps_to_ticks(time_ps); | |
1308 | temp = (temp + div - 1) / div; | |
1309 | return gpmc_ticks_to_ps(temp * div); | |
1310 | } | |
1311 | ||
1312 | /* XXX: can the cycles be avoided ? */ | |
1313 | static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1314 | struct gpmc_device_timings *dev_t, |
1315 | bool mux) | |
246da26d | 1316 | { |
246da26d AM |
1317 | u32 temp; |
1318 | ||
1319 | /* adv_rd_off */ | |
1320 | temp = dev_t->t_avdp_r; | |
1321 | /* XXX: mux check required ? */ | |
1322 | if (mux) { | |
1323 | /* XXX: t_avdp not to be required for sync, only added for tusb | |
1324 | * this indirectly necessitates requirement of t_avdp_r and | |
1325 | * t_avdp_w instead of having a single t_avdp | |
1326 | */ | |
1327 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh); | |
1328 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1329 | } | |
1330 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
1331 | ||
1332 | /* oe_on */ | |
1333 | temp = dev_t->t_oeasu; /* XXX: remove this ? */ | |
1334 | if (mux) { | |
1335 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach); | |
1336 | temp = max_t(u32, temp, gpmc_t->adv_rd_off + | |
1337 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe)); | |
1338 | } | |
1339 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); | |
1340 | ||
1341 | /* access */ | |
1342 | /* XXX: any scope for improvement ?, by combining oe_on | |
1343 | * and clk_activation, need to check whether | |
1344 | * access = clk_activation + round to sync clk ? | |
1345 | */ | |
1346 | temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk); | |
1347 | temp += gpmc_t->clk_activation; | |
1348 | if (dev_t->cyc_oe) | |
1349 | temp = max_t(u32, temp, gpmc_t->oe_on + | |
1350 | gpmc_ticks_to_ps(dev_t->cyc_oe)); | |
1351 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); | |
1352 | ||
1353 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
1354 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
1355 | ||
1356 | /* rd_cycle */ | |
1357 | temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez); | |
1358 | temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) + | |
1359 | gpmc_t->access; | |
1360 | /* XXX: barter t_ce_rdyz with t_cez_r ? */ | |
1361 | if (dev_t->t_ce_rdyz) | |
1362 | temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz); | |
1363 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1369 | struct gpmc_device_timings *dev_t, |
1370 | bool mux) | |
246da26d | 1371 | { |
246da26d AM |
1372 | u32 temp; |
1373 | ||
1374 | /* adv_wr_off */ | |
1375 | temp = dev_t->t_avdp_w; | |
1376 | if (mux) { | |
1377 | temp = max_t(u32, temp, | |
1378 | gpmc_t->clk_activation + dev_t->t_avdh); | |
1379 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1380 | } | |
1381 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1382 | ||
1383 | /* wr_data_mux_bus */ | |
1384 | temp = max_t(u32, dev_t->t_weasu, | |
1385 | gpmc_t->clk_activation + dev_t->t_rdyo); | |
1386 | /* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?, | |
1387 | * and in that case remember to handle we_on properly | |
1388 | */ | |
1389 | if (mux) { | |
1390 | temp = max_t(u32, temp, | |
1391 | gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1392 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1393 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1394 | } | |
1395 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1396 | ||
1397 | /* we_on */ | |
1398 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1399 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1400 | else | |
1401 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1402 | ||
1403 | /* wr_access */ | |
1404 | /* XXX: gpmc_capability check reqd ? , even if not, will not harm */ | |
1405 | gpmc_t->wr_access = gpmc_t->access; | |
1406 | ||
1407 | /* we_off */ | |
1408 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1409 | temp = max_t(u32, temp, | |
1410 | gpmc_t->wr_access + gpmc_ticks_to_ps(1)); | |
1411 | temp = max_t(u32, temp, | |
1412 | gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl)); | |
1413 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1414 | ||
1415 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1416 | dev_t->t_wph); | |
1417 | ||
1418 | /* wr_cycle */ | |
1419 | temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk); | |
1420 | temp += gpmc_t->wr_access; | |
1421 | /* XXX: barter t_ce_rdyz with t_cez_w ? */ | |
1422 | if (dev_t->t_ce_rdyz) | |
1423 | temp = max_t(u32, temp, | |
1424 | gpmc_t->cs_wr_off + dev_t->t_ce_rdyz); | |
1425 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1426 | ||
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1431 | struct gpmc_device_timings *dev_t, |
1432 | bool mux) | |
246da26d | 1433 | { |
246da26d AM |
1434 | u32 temp; |
1435 | ||
1436 | /* adv_rd_off */ | |
1437 | temp = dev_t->t_avdp_r; | |
1438 | if (mux) | |
1439 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1440 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
1441 | ||
1442 | /* oe_on */ | |
1443 | temp = dev_t->t_oeasu; | |
1444 | if (mux) | |
1445 | temp = max_t(u32, temp, | |
1446 | gpmc_t->adv_rd_off + dev_t->t_aavdh); | |
1447 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); | |
1448 | ||
1449 | /* access */ | |
1450 | temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */ | |
1451 | gpmc_t->oe_on + dev_t->t_oe); | |
1452 | temp = max_t(u32, temp, | |
1453 | gpmc_t->cs_on + dev_t->t_ce); | |
1454 | temp = max_t(u32, temp, | |
1455 | gpmc_t->adv_on + dev_t->t_aa); | |
1456 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); | |
1457 | ||
1458 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
1459 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
1460 | ||
1461 | /* rd_cycle */ | |
1462 | temp = max_t(u32, dev_t->t_rd_cycle, | |
1463 | gpmc_t->cs_rd_off + dev_t->t_cez_r); | |
1464 | temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez); | |
1465 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1471 | struct gpmc_device_timings *dev_t, |
1472 | bool mux) | |
246da26d | 1473 | { |
246da26d AM |
1474 | u32 temp; |
1475 | ||
1476 | /* adv_wr_off */ | |
1477 | temp = dev_t->t_avdp_w; | |
1478 | if (mux) | |
1479 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1480 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1481 | ||
1482 | /* wr_data_mux_bus */ | |
1483 | temp = dev_t->t_weasu; | |
1484 | if (mux) { | |
1485 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1486 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1487 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1488 | } | |
1489 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1490 | ||
1491 | /* we_on */ | |
1492 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1493 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1494 | else | |
1495 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1496 | ||
1497 | /* we_off */ | |
1498 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1499 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1500 | ||
1501 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1502 | dev_t->t_wph); | |
1503 | ||
1504 | /* wr_cycle */ | |
1505 | temp = max_t(u32, dev_t->t_wr_cycle, | |
1506 | gpmc_t->cs_wr_off + dev_t->t_cez_w); | |
1507 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t, | |
1513 | struct gpmc_device_timings *dev_t) | |
1514 | { | |
1515 | u32 temp; | |
1516 | ||
1517 | gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) * | |
1518 | gpmc_get_fclk_period(); | |
1519 | ||
1520 | gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk( | |
1521 | dev_t->t_bacc, | |
1522 | gpmc_t->sync_clk); | |
1523 | ||
1524 | temp = max_t(u32, dev_t->t_ces, dev_t->t_avds); | |
1525 | gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp); | |
1526 | ||
1527 | if (gpmc_calc_divider(gpmc_t->sync_clk) != 1) | |
1528 | return 0; | |
1529 | ||
1530 | if (dev_t->ce_xdelay) | |
1531 | gpmc_t->bool_timings.cs_extra_delay = true; | |
1532 | if (dev_t->avd_xdelay) | |
1533 | gpmc_t->bool_timings.adv_extra_delay = true; | |
1534 | if (dev_t->oe_xdelay) | |
1535 | gpmc_t->bool_timings.oe_extra_delay = true; | |
1536 | if (dev_t->we_xdelay) | |
1537 | gpmc_t->bool_timings.we_extra_delay = true; | |
1538 | ||
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1543 | struct gpmc_device_timings *dev_t, |
1544 | bool sync) | |
246da26d AM |
1545 | { |
1546 | u32 temp; | |
1547 | ||
1548 | /* cs_on */ | |
1549 | gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu); | |
1550 | ||
1551 | /* adv_on */ | |
1552 | temp = dev_t->t_avdasu; | |
1553 | if (dev_t->t_ce_avd) | |
1554 | temp = max_t(u32, temp, | |
1555 | gpmc_t->cs_on + dev_t->t_ce_avd); | |
1556 | gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp); | |
1557 | ||
c3be5b45 | 1558 | if (sync) |
246da26d AM |
1559 | gpmc_calc_sync_common_timings(gpmc_t, dev_t); |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
1564 | /* TODO: remove this function once all peripherals are confirmed to | |
1565 | * work with generic timing. Simultaneously gpmc_cs_set_timings() | |
1566 | * has to be modified to handle timings in ps instead of ns | |
1567 | */ | |
1568 | static void gpmc_convert_ps_to_ns(struct gpmc_timings *t) | |
1569 | { | |
1570 | t->cs_on /= 1000; | |
1571 | t->cs_rd_off /= 1000; | |
1572 | t->cs_wr_off /= 1000; | |
1573 | t->adv_on /= 1000; | |
1574 | t->adv_rd_off /= 1000; | |
1575 | t->adv_wr_off /= 1000; | |
1576 | t->we_on /= 1000; | |
1577 | t->we_off /= 1000; | |
1578 | t->oe_on /= 1000; | |
1579 | t->oe_off /= 1000; | |
1580 | t->page_burst_access /= 1000; | |
1581 | t->access /= 1000; | |
1582 | t->rd_cycle /= 1000; | |
1583 | t->wr_cycle /= 1000; | |
1584 | t->bus_turnaround /= 1000; | |
1585 | t->cycle2cycle_delay /= 1000; | |
1586 | t->wait_monitoring /= 1000; | |
1587 | t->clk_activation /= 1000; | |
1588 | t->wr_access /= 1000; | |
1589 | t->wr_data_mux_bus /= 1000; | |
1590 | } | |
1591 | ||
1592 | int gpmc_calc_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1593 | struct gpmc_settings *gpmc_s, |
1594 | struct gpmc_device_timings *dev_t) | |
246da26d | 1595 | { |
c3be5b45 JH |
1596 | bool mux = false, sync = false; |
1597 | ||
1598 | if (gpmc_s) { | |
1599 | mux = gpmc_s->mux_add_data ? true : false; | |
1600 | sync = (gpmc_s->sync_read || gpmc_s->sync_write); | |
1601 | } | |
1602 | ||
246da26d AM |
1603 | memset(gpmc_t, 0, sizeof(*gpmc_t)); |
1604 | ||
c3be5b45 | 1605 | gpmc_calc_common_timings(gpmc_t, dev_t, sync); |
246da26d | 1606 | |
c3be5b45 JH |
1607 | if (gpmc_s && gpmc_s->sync_read) |
1608 | gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux); | |
246da26d | 1609 | else |
c3be5b45 | 1610 | gpmc_calc_async_read_timings(gpmc_t, dev_t, mux); |
246da26d | 1611 | |
c3be5b45 JH |
1612 | if (gpmc_s && gpmc_s->sync_write) |
1613 | gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux); | |
246da26d | 1614 | else |
c3be5b45 | 1615 | gpmc_calc_async_write_timings(gpmc_t, dev_t, mux); |
246da26d AM |
1616 | |
1617 | /* TODO: remove, see function definition */ | |
1618 | gpmc_convert_ps_to_ns(gpmc_t); | |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
aa8d4767 JH |
1623 | /** |
1624 | * gpmc_cs_program_settings - programs non-timing related settings | |
1625 | * @cs: GPMC chip-select to program | |
1626 | * @p: pointer to GPMC settings structure | |
1627 | * | |
1628 | * Programs non-timing related settings for a GPMC chip-select, such as | |
1629 | * bus-width, burst configuration, etc. Function should be called once | |
1630 | * for each chip-select that is being used and must be called before | |
1631 | * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1 | |
1632 | * register will be initialised to zero by this function. Returns 0 on | |
1633 | * success and appropriate negative error code on failure. | |
1634 | */ | |
1635 | int gpmc_cs_program_settings(int cs, struct gpmc_settings *p) | |
1636 | { | |
1637 | u32 config1; | |
1638 | ||
1639 | if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) { | |
1640 | pr_err("%s: invalid width %d!", __func__, p->device_width); | |
1641 | return -EINVAL; | |
1642 | } | |
1643 | ||
1644 | /* Address-data multiplexing not supported for NAND devices */ | |
1645 | if (p->device_nand && p->mux_add_data) { | |
1646 | pr_err("%s: invalid configuration!\n", __func__); | |
1647 | return -EINVAL; | |
1648 | } | |
1649 | ||
1650 | if ((p->mux_add_data > GPMC_MUX_AD) || | |
1651 | ((p->mux_add_data == GPMC_MUX_AAD) && | |
1652 | !(gpmc_capability & GPMC_HAS_MUX_AAD))) { | |
1653 | pr_err("%s: invalid multiplex configuration!\n", __func__); | |
1654 | return -EINVAL; | |
1655 | } | |
1656 | ||
1657 | /* Page/burst mode supports lengths of 4, 8 and 16 bytes */ | |
1658 | if (p->burst_read || p->burst_write) { | |
1659 | switch (p->burst_len) { | |
1660 | case GPMC_BURST_4: | |
1661 | case GPMC_BURST_8: | |
1662 | case GPMC_BURST_16: | |
1663 | break; | |
1664 | default: | |
1665 | pr_err("%s: invalid page/burst-length (%d)\n", | |
1666 | __func__, p->burst_len); | |
1667 | return -EINVAL; | |
1668 | } | |
1669 | } | |
1670 | ||
2b54057c | 1671 | if (p->wait_pin > gpmc_nr_waitpins) { |
aa8d4767 JH |
1672 | pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin); |
1673 | return -EINVAL; | |
1674 | } | |
1675 | ||
1676 | config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1)); | |
1677 | ||
1678 | if (p->sync_read) | |
1679 | config1 |= GPMC_CONFIG1_READTYPE_SYNC; | |
1680 | if (p->sync_write) | |
1681 | config1 |= GPMC_CONFIG1_WRITETYPE_SYNC; | |
1682 | if (p->wait_on_read) | |
1683 | config1 |= GPMC_CONFIG1_WAIT_READ_MON; | |
1684 | if (p->wait_on_write) | |
1685 | config1 |= GPMC_CONFIG1_WAIT_WRITE_MON; | |
1686 | if (p->wait_on_read || p->wait_on_write) | |
1687 | config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin); | |
1688 | if (p->device_nand) | |
1689 | config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND); | |
1690 | if (p->mux_add_data) | |
1691 | config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data); | |
1692 | if (p->burst_read) | |
1693 | config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP; | |
1694 | if (p->burst_write) | |
1695 | config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP; | |
1696 | if (p->burst_read || p->burst_write) { | |
1697 | config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3); | |
1698 | config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0; | |
1699 | } | |
1700 | ||
1701 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1); | |
1702 | ||
1703 | return 0; | |
1704 | } | |
1705 | ||
bc6b1e7b | 1706 | #ifdef CONFIG_OF |
31957609 | 1707 | static const struct of_device_id gpmc_dt_ids[] = { |
bc6b1e7b DM |
1708 | { .compatible = "ti,omap2420-gpmc" }, |
1709 | { .compatible = "ti,omap2430-gpmc" }, | |
1710 | { .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */ | |
1711 | { .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */ | |
1712 | { .compatible = "ti,am3352-gpmc" }, /* am335x devices */ | |
1713 | { } | |
1714 | }; | |
1715 | MODULE_DEVICE_TABLE(of, gpmc_dt_ids); | |
1716 | ||
8c8a7771 JH |
1717 | /** |
1718 | * gpmc_read_settings_dt - read gpmc settings from device-tree | |
1719 | * @np: pointer to device-tree node for a gpmc child device | |
1720 | * @p: pointer to gpmc settings structure | |
1721 | * | |
1722 | * Reads the GPMC settings for a GPMC child device from device-tree and | |
1723 | * stores them in the GPMC settings structure passed. The GPMC settings | |
1724 | * structure is initialised to zero by this function and so any | |
1725 | * previously stored settings will be cleared. | |
1726 | */ | |
1727 | void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) | |
1728 | { | |
1729 | memset(p, 0, sizeof(struct gpmc_settings)); | |
1730 | ||
1731 | p->sync_read = of_property_read_bool(np, "gpmc,sync-read"); | |
1732 | p->sync_write = of_property_read_bool(np, "gpmc,sync-write"); | |
8c8a7771 JH |
1733 | of_property_read_u32(np, "gpmc,device-width", &p->device_width); |
1734 | of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data); | |
1735 | ||
1736 | if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) { | |
1737 | p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap"); | |
1738 | p->burst_read = of_property_read_bool(np, "gpmc,burst-read"); | |
1739 | p->burst_write = of_property_read_bool(np, "gpmc,burst-write"); | |
1740 | if (!p->burst_read && !p->burst_write) | |
1741 | pr_warn("%s: page/burst-length set but not used!\n", | |
1742 | __func__); | |
1743 | } | |
1744 | ||
1745 | if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) { | |
1746 | p->wait_on_read = of_property_read_bool(np, | |
1747 | "gpmc,wait-on-read"); | |
1748 | p->wait_on_write = of_property_read_bool(np, | |
1749 | "gpmc,wait-on-write"); | |
1750 | if (!p->wait_on_read && !p->wait_on_write) | |
2b54057c RQ |
1751 | pr_debug("%s: rd/wr wait monitoring not enabled!\n", |
1752 | __func__); | |
8c8a7771 JH |
1753 | } |
1754 | } | |
1755 | ||
bc6b1e7b DM |
1756 | static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, |
1757 | struct gpmc_timings *gpmc_t) | |
1758 | { | |
d36b4cd4 JH |
1759 | struct gpmc_bool_timings *p; |
1760 | ||
1761 | if (!np || !gpmc_t) | |
1762 | return; | |
bc6b1e7b DM |
1763 | |
1764 | memset(gpmc_t, 0, sizeof(*gpmc_t)); | |
1765 | ||
1766 | /* minimum clock period for syncronous mode */ | |
d36b4cd4 | 1767 | of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk); |
bc6b1e7b DM |
1768 | |
1769 | /* chip select timtings */ | |
d36b4cd4 JH |
1770 | of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on); |
1771 | of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off); | |
1772 | of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off); | |
bc6b1e7b DM |
1773 | |
1774 | /* ADV signal timings */ | |
d36b4cd4 JH |
1775 | of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on); |
1776 | of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off); | |
1777 | of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off); | |
2c92c04b NA |
1778 | of_property_read_u32(np, "gpmc,adv-aad-mux-on-ns", |
1779 | &gpmc_t->adv_aad_mux_on); | |
1780 | of_property_read_u32(np, "gpmc,adv-aad-mux-rd-off-ns", | |
1781 | &gpmc_t->adv_aad_mux_rd_off); | |
1782 | of_property_read_u32(np, "gpmc,adv-aad-mux-wr-off-ns", | |
1783 | &gpmc_t->adv_aad_mux_wr_off); | |
bc6b1e7b DM |
1784 | |
1785 | /* WE signal timings */ | |
d36b4cd4 JH |
1786 | of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on); |
1787 | of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off); | |
bc6b1e7b DM |
1788 | |
1789 | /* OE signal timings */ | |
d36b4cd4 JH |
1790 | of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on); |
1791 | of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off); | |
2c92c04b NA |
1792 | of_property_read_u32(np, "gpmc,oe-aad-mux-on-ns", |
1793 | &gpmc_t->oe_aad_mux_on); | |
1794 | of_property_read_u32(np, "gpmc,oe-aad-mux-off-ns", | |
1795 | &gpmc_t->oe_aad_mux_off); | |
bc6b1e7b DM |
1796 | |
1797 | /* access and cycle timings */ | |
d36b4cd4 JH |
1798 | of_property_read_u32(np, "gpmc,page-burst-access-ns", |
1799 | &gpmc_t->page_burst_access); | |
1800 | of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access); | |
1801 | of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle); | |
1802 | of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle); | |
1803 | of_property_read_u32(np, "gpmc,bus-turnaround-ns", | |
1804 | &gpmc_t->bus_turnaround); | |
1805 | of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns", | |
1806 | &gpmc_t->cycle2cycle_delay); | |
1807 | of_property_read_u32(np, "gpmc,wait-monitoring-ns", | |
1808 | &gpmc_t->wait_monitoring); | |
1809 | of_property_read_u32(np, "gpmc,clk-activation-ns", | |
1810 | &gpmc_t->clk_activation); | |
1811 | ||
1812 | /* only applicable to OMAP3+ */ | |
1813 | of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access); | |
1814 | of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns", | |
1815 | &gpmc_t->wr_data_mux_bus); | |
1816 | ||
1817 | /* bool timing parameters */ | |
1818 | p = &gpmc_t->bool_timings; | |
1819 | ||
1820 | p->cycle2cyclediffcsen = | |
1821 | of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen"); | |
1822 | p->cycle2cyclesamecsen = | |
1823 | of_property_read_bool(np, "gpmc,cycle2cycle-samecsen"); | |
1824 | p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay"); | |
1825 | p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay"); | |
1826 | p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay"); | |
1827 | p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay"); | |
1828 | p->time_para_granularity = | |
1829 | of_property_read_bool(np, "gpmc,time-para-granularity"); | |
bc6b1e7b DM |
1830 | } |
1831 | ||
6b187b21 | 1832 | #if IS_ENABLED(CONFIG_MTD_NAND) |
bc6b1e7b | 1833 | |
496c8a0b MJ |
1834 | static const char * const nand_xfer_types[] = { |
1835 | [NAND_OMAP_PREFETCH_POLLED] = "prefetch-polled", | |
1836 | [NAND_OMAP_POLLED] = "polled", | |
1837 | [NAND_OMAP_PREFETCH_DMA] = "prefetch-dma", | |
1838 | [NAND_OMAP_PREFETCH_IRQ] = "prefetch-irq", | |
1839 | }; | |
1840 | ||
bc6b1e7b DM |
1841 | static int gpmc_probe_nand_child(struct platform_device *pdev, |
1842 | struct device_node *child) | |
1843 | { | |
1844 | u32 val; | |
1845 | const char *s; | |
1846 | struct gpmc_timings gpmc_t; | |
1847 | struct omap_nand_platform_data *gpmc_nand_data; | |
1848 | ||
1849 | if (of_property_read_u32(child, "reg", &val) < 0) { | |
1850 | dev_err(&pdev->dev, "%s has no 'reg' property\n", | |
1851 | child->full_name); | |
1852 | return -ENODEV; | |
1853 | } | |
1854 | ||
1855 | gpmc_nand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_nand_data), | |
1856 | GFP_KERNEL); | |
1857 | if (!gpmc_nand_data) | |
1858 | return -ENOMEM; | |
1859 | ||
1860 | gpmc_nand_data->cs = val; | |
1861 | gpmc_nand_data->of_node = child; | |
1862 | ||
ac65caf5 PG |
1863 | /* Detect availability of ELM module */ |
1864 | gpmc_nand_data->elm_of_node = of_parse_phandle(child, "ti,elm-id", 0); | |
1865 | if (gpmc_nand_data->elm_of_node == NULL) | |
1866 | gpmc_nand_data->elm_of_node = | |
1867 | of_parse_phandle(child, "elm_id", 0); | |
ac65caf5 PG |
1868 | |
1869 | /* select ecc-scheme for NAND */ | |
1870 | if (of_property_read_string(child, "ti,nand-ecc-opt", &s)) { | |
1871 | pr_err("%s: ti,nand-ecc-opt not found\n", __func__); | |
1872 | return -ENODEV; | |
1873 | } | |
a3e83f05 RQ |
1874 | |
1875 | if (!strcmp(s, "sw")) | |
1876 | gpmc_nand_data->ecc_opt = OMAP_ECC_HAM1_CODE_SW; | |
1877 | else if (!strcmp(s, "ham1") || | |
1878 | !strcmp(s, "hw") || !strcmp(s, "hw-romcode")) | |
ac65caf5 PG |
1879 | gpmc_nand_data->ecc_opt = |
1880 | OMAP_ECC_HAM1_CODE_HW; | |
1881 | else if (!strcmp(s, "bch4")) | |
1882 | if (gpmc_nand_data->elm_of_node) | |
1883 | gpmc_nand_data->ecc_opt = | |
1884 | OMAP_ECC_BCH4_CODE_HW; | |
1885 | else | |
1886 | gpmc_nand_data->ecc_opt = | |
1887 | OMAP_ECC_BCH4_CODE_HW_DETECTION_SW; | |
1888 | else if (!strcmp(s, "bch8")) | |
1889 | if (gpmc_nand_data->elm_of_node) | |
1890 | gpmc_nand_data->ecc_opt = | |
1891 | OMAP_ECC_BCH8_CODE_HW; | |
1892 | else | |
1893 | gpmc_nand_data->ecc_opt = | |
1894 | OMAP_ECC_BCH8_CODE_HW_DETECTION_SW; | |
27c9fd60 | 1895 | else if (!strcmp(s, "bch16")) |
1896 | if (gpmc_nand_data->elm_of_node) | |
1897 | gpmc_nand_data->ecc_opt = | |
1898 | OMAP_ECC_BCH16_CODE_HW; | |
1899 | else | |
1900 | pr_err("%s: BCH16 requires ELM support\n", __func__); | |
ac65caf5 PG |
1901 | else |
1902 | pr_err("%s: ti,nand-ecc-opt invalid value\n", __func__); | |
bc6b1e7b | 1903 | |
ac65caf5 | 1904 | /* select data transfer mode for NAND controller */ |
496c8a0b MJ |
1905 | if (!of_property_read_string(child, "ti,nand-xfer-type", &s)) |
1906 | for (val = 0; val < ARRAY_SIZE(nand_xfer_types); val++) | |
1907 | if (!strcasecmp(s, nand_xfer_types[val])) { | |
1908 | gpmc_nand_data->xfer_type = val; | |
1909 | break; | |
1910 | } | |
1911 | ||
fef775ca EG |
1912 | gpmc_nand_data->flash_bbt = of_get_nand_on_flash_bbt(child); |
1913 | ||
bc6b1e7b DM |
1914 | val = of_get_nand_bus_width(child); |
1915 | if (val == 16) | |
1916 | gpmc_nand_data->devsize = NAND_BUSWIDTH_16; | |
1917 | ||
1918 | gpmc_read_timings_dt(child, &gpmc_t); | |
1919 | gpmc_nand_init(gpmc_nand_data, &gpmc_t); | |
1920 | ||
1921 | return 0; | |
1922 | } | |
1923 | #else | |
1924 | static int gpmc_probe_nand_child(struct platform_device *pdev, | |
1925 | struct device_node *child) | |
1926 | { | |
1927 | return 0; | |
1928 | } | |
1929 | #endif | |
1930 | ||
980386d2 | 1931 | #if IS_ENABLED(CONFIG_MTD_ONENAND) |
75d3625e EG |
1932 | static int gpmc_probe_onenand_child(struct platform_device *pdev, |
1933 | struct device_node *child) | |
1934 | { | |
1935 | u32 val; | |
1936 | struct omap_onenand_platform_data *gpmc_onenand_data; | |
1937 | ||
1938 | if (of_property_read_u32(child, "reg", &val) < 0) { | |
1939 | dev_err(&pdev->dev, "%s has no 'reg' property\n", | |
1940 | child->full_name); | |
1941 | return -ENODEV; | |
1942 | } | |
1943 | ||
1944 | gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data), | |
1945 | GFP_KERNEL); | |
1946 | if (!gpmc_onenand_data) | |
1947 | return -ENOMEM; | |
1948 | ||
1949 | gpmc_onenand_data->cs = val; | |
1950 | gpmc_onenand_data->of_node = child; | |
1951 | gpmc_onenand_data->dma_channel = -1; | |
1952 | ||
1953 | if (!of_property_read_u32(child, "dma-channel", &val)) | |
1954 | gpmc_onenand_data->dma_channel = val; | |
1955 | ||
1956 | gpmc_onenand_init(gpmc_onenand_data); | |
1957 | ||
1958 | return 0; | |
1959 | } | |
1960 | #else | |
1961 | static int gpmc_probe_onenand_child(struct platform_device *pdev, | |
1962 | struct device_node *child) | |
1963 | { | |
1964 | return 0; | |
1965 | } | |
1966 | #endif | |
1967 | ||
cdd6928c | 1968 | /** |
3af91cf7 | 1969 | * gpmc_probe_generic_child - configures the gpmc for a child device |
cdd6928c | 1970 | * @pdev: pointer to gpmc platform device |
3af91cf7 | 1971 | * @child: pointer to device-tree node for child device |
cdd6928c | 1972 | * |
3af91cf7 | 1973 | * Allocates and configures a GPMC chip-select for a child device. |
cdd6928c JH |
1974 | * Returns 0 on success and appropriate negative error code on failure. |
1975 | */ | |
3af91cf7 | 1976 | static int gpmc_probe_generic_child(struct platform_device *pdev, |
cdd6928c JH |
1977 | struct device_node *child) |
1978 | { | |
1979 | struct gpmc_settings gpmc_s; | |
1980 | struct gpmc_timings gpmc_t; | |
1981 | struct resource res; | |
1982 | unsigned long base; | |
9ed7a776 | 1983 | const char *name; |
cdd6928c | 1984 | int ret, cs; |
e378d22b | 1985 | u32 val; |
cdd6928c JH |
1986 | |
1987 | if (of_property_read_u32(child, "reg", &cs) < 0) { | |
1988 | dev_err(&pdev->dev, "%s has no 'reg' property\n", | |
1989 | child->full_name); | |
1990 | return -ENODEV; | |
1991 | } | |
1992 | ||
1993 | if (of_address_to_resource(child, 0, &res) < 0) { | |
1994 | dev_err(&pdev->dev, "%s has malformed 'reg' property\n", | |
1995 | child->full_name); | |
1996 | return -ENODEV; | |
1997 | } | |
1998 | ||
9ed7a776 TL |
1999 | /* |
2000 | * Check if we have multiple instances of the same device | |
2001 | * on a single chip select. If so, use the already initialized | |
2002 | * timings. | |
2003 | */ | |
2004 | name = gpmc_cs_get_name(cs); | |
2005 | if (name && child->name && of_node_cmp(child->name, name) == 0) | |
2006 | goto no_timings; | |
2007 | ||
cdd6928c JH |
2008 | ret = gpmc_cs_request(cs, resource_size(&res), &base); |
2009 | if (ret < 0) { | |
2010 | dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs); | |
2011 | return ret; | |
2012 | } | |
9ed7a776 | 2013 | gpmc_cs_set_name(cs, child->name); |
cdd6928c | 2014 | |
35ac051e TL |
2015 | gpmc_read_settings_dt(child, &gpmc_s); |
2016 | gpmc_read_timings_dt(child, &gpmc_t); | |
cdd6928c | 2017 | |
fd4446f2 TL |
2018 | /* |
2019 | * For some GPMC devices we still need to rely on the bootloader | |
35ac051e TL |
2020 | * timings because the devices can be connected via FPGA. |
2021 | * REVISIT: Add timing support from slls644g.pdf. | |
fd4446f2 | 2022 | */ |
35ac051e TL |
2023 | if (!gpmc_t.cs_rd_off) { |
2024 | WARN(1, "enable GPMC debug to configure .dts timings for CS%i\n", | |
2025 | cs); | |
2026 | gpmc_cs_show_timings(cs, | |
2027 | "please add GPMC bootloader timings to .dts"); | |
fd4446f2 TL |
2028 | goto no_timings; |
2029 | } | |
2030 | ||
4cf27d2e RQ |
2031 | /* CS must be disabled while making changes to gpmc configuration */ |
2032 | gpmc_cs_disable_mem(cs); | |
2033 | ||
cdd6928c JH |
2034 | /* |
2035 | * FIXME: gpmc_cs_request() will map the CS to an arbitary | |
2036 | * location in the gpmc address space. When booting with | |
2037 | * device-tree we want the NOR flash to be mapped to the | |
2038 | * location specified in the device-tree blob. So remap the | |
2039 | * CS to this location. Once DT migration is complete should | |
2040 | * just make gpmc_cs_request() map a specific address. | |
2041 | */ | |
2042 | ret = gpmc_cs_remap(cs, res.start); | |
2043 | if (ret < 0) { | |
f70bf2a3 FE |
2044 | dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n", |
2045 | cs, &res.start); | |
cdd6928c JH |
2046 | goto err; |
2047 | } | |
2048 | ||
cdd6928c JH |
2049 | ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width); |
2050 | if (ret < 0) | |
2051 | goto err; | |
2052 | ||
fd820a1e | 2053 | gpmc_cs_show_timings(cs, "before gpmc_cs_program_settings"); |
cdd6928c JH |
2054 | ret = gpmc_cs_program_settings(cs, &gpmc_s); |
2055 | if (ret < 0) | |
2056 | goto err; | |
2057 | ||
2e676901 | 2058 | ret = gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); |
7604baf3 RQ |
2059 | if (ret) { |
2060 | dev_err(&pdev->dev, "failed to set gpmc timings for: %s\n", | |
2061 | child->name); | |
2062 | goto err; | |
2063 | } | |
cdd6928c | 2064 | |
e378d22b RQ |
2065 | /* Clear limited address i.e. enable A26-A11 */ |
2066 | val = gpmc_read_reg(GPMC_CONFIG); | |
2067 | val &= ~GPMC_CONFIG_LIMITEDADDRESS; | |
2068 | gpmc_write_reg(GPMC_CONFIG, val); | |
2069 | ||
4cf27d2e RQ |
2070 | /* Enable CS region */ |
2071 | gpmc_cs_enable_mem(cs); | |
cdd6928c | 2072 | |
fd4446f2 | 2073 | no_timings: |
b1dc1ca9 RA |
2074 | |
2075 | /* create platform device, NULL on error or when disabled */ | |
2076 | if (!of_platform_device_create(child, NULL, &pdev->dev)) | |
2077 | goto err_child_fail; | |
2078 | ||
2079 | /* is child a common bus? */ | |
2080 | if (of_match_node(of_default_bus_match_table, child)) | |
2081 | /* create children and other common bus children */ | |
2082 | if (of_platform_populate(child, of_default_bus_match_table, | |
2083 | NULL, &pdev->dev)) | |
2084 | goto err_child_fail; | |
2085 | ||
2086 | return 0; | |
2087 | ||
2088 | err_child_fail: | |
cdd6928c JH |
2089 | |
2090 | dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name); | |
e8ffd6fd | 2091 | ret = -ENODEV; |
cdd6928c JH |
2092 | |
2093 | err: | |
2094 | gpmc_cs_free(cs); | |
2095 | ||
2096 | return ret; | |
2097 | } | |
2098 | ||
bc6b1e7b DM |
2099 | static int gpmc_probe_dt(struct platform_device *pdev) |
2100 | { | |
2101 | int ret; | |
2102 | struct device_node *child; | |
2103 | const struct of_device_id *of_id = | |
2104 | of_match_device(gpmc_dt_ids, &pdev->dev); | |
2105 | ||
2106 | if (!of_id) | |
2107 | return 0; | |
2108 | ||
f34f3716 GP |
2109 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs", |
2110 | &gpmc_cs_num); | |
2111 | if (ret < 0) { | |
2112 | pr_err("%s: number of chip-selects not defined\n", __func__); | |
2113 | return ret; | |
2114 | } else if (gpmc_cs_num < 1) { | |
2115 | pr_err("%s: all chip-selects are disabled\n", __func__); | |
2116 | return -EINVAL; | |
2117 | } else if (gpmc_cs_num > GPMC_CS_NUM) { | |
2118 | pr_err("%s: number of supported chip-selects cannot be > %d\n", | |
2119 | __func__, GPMC_CS_NUM); | |
2120 | return -EINVAL; | |
2121 | } | |
2122 | ||
9f833156 JH |
2123 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins", |
2124 | &gpmc_nr_waitpins); | |
2125 | if (ret < 0) { | |
2126 | pr_err("%s: number of wait pins not found!\n", __func__); | |
2127 | return ret; | |
2128 | } | |
2129 | ||
68e2eb53 | 2130 | for_each_available_child_of_node(pdev->dev.of_node, child) { |
bc6b1e7b | 2131 | |
f2b09f67 JMC |
2132 | if (!child->name) |
2133 | continue; | |
cdd6928c | 2134 | |
f2b09f67 JMC |
2135 | if (of_node_cmp(child->name, "nand") == 0) |
2136 | ret = gpmc_probe_nand_child(pdev, child); | |
2137 | else if (of_node_cmp(child->name, "onenand") == 0) | |
2138 | ret = gpmc_probe_onenand_child(pdev, child); | |
28a7eedd | 2139 | else |
f2b09f67 | 2140 | ret = gpmc_probe_generic_child(pdev, child); |
5330dc16 JMC |
2141 | } |
2142 | ||
bc6b1e7b DM |
2143 | return 0; |
2144 | } | |
2145 | #else | |
2146 | static int gpmc_probe_dt(struct platform_device *pdev) | |
2147 | { | |
2148 | return 0; | |
2149 | } | |
2150 | #endif | |
2151 | ||
351a102d | 2152 | static int gpmc_probe(struct platform_device *pdev) |
4bbbc1ad | 2153 | { |
8119024e | 2154 | int rc; |
6b6c32fc | 2155 | u32 l; |
da496873 | 2156 | struct resource *res; |
4bbbc1ad | 2157 | |
da496873 AM |
2158 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2159 | if (res == NULL) | |
2160 | return -ENOENT; | |
8d08436d | 2161 | |
da496873 AM |
2162 | phys_base = res->start; |
2163 | mem_size = resource_size(res); | |
fd1dc87d | 2164 | |
5857bd98 TR |
2165 | gpmc_base = devm_ioremap_resource(&pdev->dev, res); |
2166 | if (IS_ERR(gpmc_base)) | |
2167 | return PTR_ERR(gpmc_base); | |
da496873 AM |
2168 | |
2169 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2170 | if (res == NULL) | |
2171 | dev_warn(&pdev->dev, "Failed to get resource: irq\n"); | |
2172 | else | |
2173 | gpmc_irq = res->start; | |
2174 | ||
8bf9be56 | 2175 | gpmc_l3_clk = devm_clk_get(&pdev->dev, "fck"); |
da496873 | 2176 | if (IS_ERR(gpmc_l3_clk)) { |
8bf9be56 | 2177 | dev_err(&pdev->dev, "Failed to get GPMC fck\n"); |
da496873 AM |
2178 | gpmc_irq = 0; |
2179 | return PTR_ERR(gpmc_l3_clk); | |
fd1dc87d PW |
2180 | } |
2181 | ||
8bf9be56 RQ |
2182 | if (!clk_get_rate(gpmc_l3_clk)) { |
2183 | dev_err(&pdev->dev, "Invalid GPMC fck clock rate\n"); | |
2184 | return -EINVAL; | |
2185 | } | |
2186 | ||
b3f5525c | 2187 | pm_runtime_enable(&pdev->dev); |
2188 | pm_runtime_get_sync(&pdev->dev); | |
1daa8c1d | 2189 | |
da496873 AM |
2190 | gpmc_dev = &pdev->dev; |
2191 | ||
4bbbc1ad | 2192 | l = gpmc_read_reg(GPMC_REVISION); |
aa8d4767 JH |
2193 | |
2194 | /* | |
2195 | * FIXME: Once device-tree migration is complete the below flags | |
2196 | * should be populated based upon the device-tree compatible | |
2197 | * string. For now just use the IP revision. OMAP3+ devices have | |
2198 | * the wr_access and wr_data_mux_bus register fields. OMAP4+ | |
2199 | * devices support the addr-addr-data multiplex protocol. | |
2200 | * | |
2201 | * GPMC IP revisions: | |
2202 | * - OMAP24xx = 2.0 | |
2203 | * - OMAP3xxx = 5.0 | |
2204 | * - OMAP44xx/54xx/AM335x = 6.0 | |
2205 | */ | |
da496873 AM |
2206 | if (GPMC_REVISION_MAJOR(l) > 0x4) |
2207 | gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS; | |
aa8d4767 JH |
2208 | if (GPMC_REVISION_MAJOR(l) > 0x5) |
2209 | gpmc_capability |= GPMC_HAS_MUX_AAD; | |
da496873 AM |
2210 | dev_info(gpmc_dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l), |
2211 | GPMC_REVISION_MINOR(l)); | |
2212 | ||
84b00f0e | 2213 | gpmc_mem_init(); |
db97eb7d | 2214 | |
71856843 | 2215 | if (gpmc_setup_irq() < 0) |
da496873 AM |
2216 | dev_warn(gpmc_dev, "gpmc_setup_irq failed\n"); |
2217 | ||
f34f3716 GP |
2218 | if (!pdev->dev.of_node) { |
2219 | gpmc_cs_num = GPMC_CS_NUM; | |
9f833156 | 2220 | gpmc_nr_waitpins = GPMC_NR_WAITPINS; |
f34f3716 | 2221 | } |
9f833156 | 2222 | |
bc6b1e7b DM |
2223 | rc = gpmc_probe_dt(pdev); |
2224 | if (rc < 0) { | |
b3f5525c | 2225 | pm_runtime_put_sync(&pdev->dev); |
bc6b1e7b DM |
2226 | dev_err(gpmc_dev, "failed to probe DT parameters\n"); |
2227 | return rc; | |
2228 | } | |
2229 | ||
da496873 AM |
2230 | return 0; |
2231 | } | |
2232 | ||
351a102d | 2233 | static int gpmc_remove(struct platform_device *pdev) |
da496873 AM |
2234 | { |
2235 | gpmc_free_irq(); | |
2236 | gpmc_mem_exit(); | |
b3f5525c | 2237 | pm_runtime_put_sync(&pdev->dev); |
2238 | pm_runtime_disable(&pdev->dev); | |
da496873 AM |
2239 | gpmc_dev = NULL; |
2240 | return 0; | |
2241 | } | |
2242 | ||
b536dd41 | 2243 | #ifdef CONFIG_PM_SLEEP |
2244 | static int gpmc_suspend(struct device *dev) | |
2245 | { | |
2246 | omap3_gpmc_save_context(); | |
2247 | pm_runtime_put_sync(dev); | |
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | static int gpmc_resume(struct device *dev) | |
2252 | { | |
2253 | pm_runtime_get_sync(dev); | |
2254 | omap3_gpmc_restore_context(); | |
2255 | return 0; | |
2256 | } | |
2257 | #endif | |
2258 | ||
2259 | static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume); | |
2260 | ||
da496873 AM |
2261 | static struct platform_driver gpmc_driver = { |
2262 | .probe = gpmc_probe, | |
351a102d | 2263 | .remove = gpmc_remove, |
da496873 AM |
2264 | .driver = { |
2265 | .name = DEVICE_NAME, | |
bc6b1e7b | 2266 | .of_match_table = of_match_ptr(gpmc_dt_ids), |
b536dd41 | 2267 | .pm = &gpmc_pm_ops, |
da496873 AM |
2268 | }, |
2269 | }; | |
2270 | ||
2271 | static __init int gpmc_init(void) | |
2272 | { | |
2273 | return platform_driver_register(&gpmc_driver); | |
2274 | } | |
2275 | ||
2276 | static __exit void gpmc_exit(void) | |
2277 | { | |
2278 | platform_driver_unregister(&gpmc_driver); | |
2279 | ||
db97eb7d | 2280 | } |
da496873 | 2281 | |
a8612809 | 2282 | postcore_initcall(gpmc_init); |
da496873 | 2283 | module_exit(gpmc_exit); |
db97eb7d SG |
2284 | |
2285 | static irqreturn_t gpmc_handle_irq(int irq, void *dev) | |
2286 | { | |
6b6c32fc AM |
2287 | int i; |
2288 | u32 regval; | |
2289 | ||
2290 | regval = gpmc_read_reg(GPMC_IRQSTATUS); | |
2291 | ||
2292 | if (!regval) | |
2293 | return IRQ_NONE; | |
2294 | ||
2295 | for (i = 0; i < GPMC_NR_IRQ; i++) | |
2296 | if (regval & gpmc_client_irq[i].bitmask) | |
2297 | generic_handle_irq(gpmc_client_irq[i].irq); | |
db97eb7d | 2298 | |
6b6c32fc | 2299 | gpmc_write_reg(GPMC_IRQSTATUS, regval); |
db97eb7d SG |
2300 | |
2301 | return IRQ_HANDLED; | |
4bbbc1ad | 2302 | } |
a2d3e7ba | 2303 | |
a2d3e7ba RN |
2304 | static struct omap3_gpmc_regs gpmc_context; |
2305 | ||
b2fa3b7c | 2306 | void omap3_gpmc_save_context(void) |
a2d3e7ba RN |
2307 | { |
2308 | int i; | |
b2fa3b7c | 2309 | |
e984a179 TV |
2310 | if (!gpmc_base) |
2311 | return; | |
2312 | ||
a2d3e7ba RN |
2313 | gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG); |
2314 | gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE); | |
2315 | gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL); | |
2316 | gpmc_context.config = gpmc_read_reg(GPMC_CONFIG); | |
2317 | gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1); | |
2318 | gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2); | |
2319 | gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL); | |
f34f3716 | 2320 | for (i = 0; i < gpmc_cs_num; i++) { |
a2d3e7ba RN |
2321 | gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i); |
2322 | if (gpmc_context.cs_context[i].is_valid) { | |
2323 | gpmc_context.cs_context[i].config1 = | |
2324 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG1); | |
2325 | gpmc_context.cs_context[i].config2 = | |
2326 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG2); | |
2327 | gpmc_context.cs_context[i].config3 = | |
2328 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG3); | |
2329 | gpmc_context.cs_context[i].config4 = | |
2330 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG4); | |
2331 | gpmc_context.cs_context[i].config5 = | |
2332 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG5); | |
2333 | gpmc_context.cs_context[i].config6 = | |
2334 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG6); | |
2335 | gpmc_context.cs_context[i].config7 = | |
2336 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG7); | |
2337 | } | |
2338 | } | |
2339 | } | |
2340 | ||
b2fa3b7c | 2341 | void omap3_gpmc_restore_context(void) |
a2d3e7ba RN |
2342 | { |
2343 | int i; | |
b2fa3b7c | 2344 | |
e984a179 TV |
2345 | if (!gpmc_base) |
2346 | return; | |
2347 | ||
a2d3e7ba RN |
2348 | gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig); |
2349 | gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable); | |
2350 | gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl); | |
2351 | gpmc_write_reg(GPMC_CONFIG, gpmc_context.config); | |
2352 | gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1); | |
2353 | gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2); | |
2354 | gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control); | |
f34f3716 | 2355 | for (i = 0; i < gpmc_cs_num; i++) { |
a2d3e7ba RN |
2356 | if (gpmc_context.cs_context[i].is_valid) { |
2357 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG1, | |
2358 | gpmc_context.cs_context[i].config1); | |
2359 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG2, | |
2360 | gpmc_context.cs_context[i].config2); | |
2361 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG3, | |
2362 | gpmc_context.cs_context[i].config3); | |
2363 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG4, | |
2364 | gpmc_context.cs_context[i].config4); | |
2365 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG5, | |
2366 | gpmc_context.cs_context[i].config5); | |
2367 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG6, | |
2368 | gpmc_context.cs_context[i].config6); | |
2369 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG7, | |
2370 | gpmc_context.cs_context[i].config7); | |
2371 | } | |
2372 | } | |
2373 | } |