Commit | Line | Data |
---|---|---|
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 | */ | |
fd1dc87d PW |
15 | #undef DEBUG |
16 | ||
db97eb7d | 17 | #include <linux/irq.h> |
4bbbc1ad JY |
18 | #include <linux/kernel.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/clk.h> | |
f37e4580 ID |
22 | #include <linux/ioport.h> |
23 | #include <linux/spinlock.h> | |
fced80c7 | 24 | #include <linux/io.h> |
fd1dc87d | 25 | #include <linux/module.h> |
db97eb7d | 26 | #include <linux/interrupt.h> |
da496873 | 27 | #include <linux/platform_device.h> |
bc6b1e7b | 28 | #include <linux/of.h> |
cdd6928c | 29 | #include <linux/of_address.h> |
bc6b1e7b DM |
30 | #include <linux/of_mtd.h> |
31 | #include <linux/of_device.h> | |
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> |
4bbbc1ad | 36 | |
7f245162 | 37 | #include <asm/mach-types.h> |
72d0f1c3 | 38 | |
dbc04161 | 39 | #include "soc.h" |
7d7e1eba | 40 | #include "common.h" |
25c7d49e | 41 | #include "omap_device.h" |
3ef5d007 | 42 | #include "gpmc.h" |
bc6b1e7b | 43 | #include "gpmc-nand.h" |
75d3625e | 44 | #include "gpmc-onenand.h" |
7d7e1eba | 45 | |
4be48fd5 AM |
46 | #define DEVICE_NAME "omap-gpmc" |
47 | ||
fd1dc87d | 48 | /* GPMC register offsets */ |
4bbbc1ad JY |
49 | #define GPMC_REVISION 0x00 |
50 | #define GPMC_SYSCONFIG 0x10 | |
51 | #define GPMC_SYSSTATUS 0x14 | |
52 | #define GPMC_IRQSTATUS 0x18 | |
53 | #define GPMC_IRQENABLE 0x1c | |
54 | #define GPMC_TIMEOUT_CONTROL 0x40 | |
55 | #define GPMC_ERR_ADDRESS 0x44 | |
56 | #define GPMC_ERR_TYPE 0x48 | |
57 | #define GPMC_CONFIG 0x50 | |
58 | #define GPMC_STATUS 0x54 | |
59 | #define GPMC_PREFETCH_CONFIG1 0x1e0 | |
60 | #define GPMC_PREFETCH_CONFIG2 0x1e4 | |
15e02a3b | 61 | #define GPMC_PREFETCH_CONTROL 0x1ec |
4bbbc1ad JY |
62 | #define GPMC_PREFETCH_STATUS 0x1f0 |
63 | #define GPMC_ECC_CONFIG 0x1f4 | |
64 | #define GPMC_ECC_CONTROL 0x1f8 | |
65 | #define GPMC_ECC_SIZE_CONFIG 0x1fc | |
948d38e7 | 66 | #define GPMC_ECC1_RESULT 0x200 |
8d602cf5 | 67 | #define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */ |
2fdf0c98 AM |
68 | #define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */ |
69 | #define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */ | |
70 | #define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */ | |
27c9fd60 | 71 | #define GPMC_ECC_BCH_RESULT_4 0x300 /* not available on OMAP2 */ |
72 | #define GPMC_ECC_BCH_RESULT_5 0x304 /* not available on OMAP2 */ | |
73 | #define GPMC_ECC_BCH_RESULT_6 0x308 /* not available on OMAP2 */ | |
4bbbc1ad | 74 | |
2c65e744 YY |
75 | /* GPMC ECC control settings */ |
76 | #define GPMC_ECC_CTRL_ECCCLEAR 0x100 | |
77 | #define GPMC_ECC_CTRL_ECCDISABLE 0x000 | |
78 | #define GPMC_ECC_CTRL_ECCREG1 0x001 | |
79 | #define GPMC_ECC_CTRL_ECCREG2 0x002 | |
80 | #define GPMC_ECC_CTRL_ECCREG3 0x003 | |
81 | #define GPMC_ECC_CTRL_ECCREG4 0x004 | |
82 | #define GPMC_ECC_CTRL_ECCREG5 0x005 | |
83 | #define GPMC_ECC_CTRL_ECCREG6 0x006 | |
84 | #define GPMC_ECC_CTRL_ECCREG7 0x007 | |
85 | #define GPMC_ECC_CTRL_ECCREG8 0x008 | |
86 | #define GPMC_ECC_CTRL_ECCREG9 0x009 | |
87 | ||
559d94b0 AM |
88 | #define GPMC_CONFIG2_CSEXTRADELAY BIT(7) |
89 | #define GPMC_CONFIG3_ADVEXTRADELAY BIT(7) | |
90 | #define GPMC_CONFIG4_OEEXTRADELAY BIT(7) | |
91 | #define GPMC_CONFIG4_WEEXTRADELAY BIT(23) | |
92 | #define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6) | |
93 | #define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7) | |
94 | ||
948d38e7 | 95 | #define GPMC_CS0_OFFSET 0x60 |
4bbbc1ad | 96 | #define GPMC_CS_SIZE 0x30 |
2fdf0c98 | 97 | #define GPMC_BCH_SIZE 0x10 |
4bbbc1ad | 98 | |
f37e4580 | 99 | #define GPMC_MEM_END 0x3FFFFFFF |
f37e4580 ID |
100 | |
101 | #define GPMC_CHUNK_SHIFT 24 /* 16 MB */ | |
102 | #define GPMC_SECTION_SHIFT 28 /* 128 MB */ | |
103 | ||
59e9c5ae | 104 | #define CS_NUM_SHIFT 24 |
105 | #define ENABLE_PREFETCH (0x1 << 7) | |
106 | #define DMA_MPU_MODE 2 | |
107 | ||
da496873 AM |
108 | #define GPMC_REVISION_MAJOR(l) ((l >> 4) & 0xf) |
109 | #define GPMC_REVISION_MINOR(l) (l & 0xf) | |
110 | ||
111 | #define GPMC_HAS_WR_ACCESS 0x1 | |
112 | #define GPMC_HAS_WR_DATA_MUX_BUS 0x2 | |
aa8d4767 | 113 | #define GPMC_HAS_MUX_AAD 0x4 |
da496873 | 114 | |
9f833156 JH |
115 | #define GPMC_NR_WAITPINS 4 |
116 | ||
6b6c32fc AM |
117 | /* XXX: Only NAND irq has been considered,currently these are the only ones used |
118 | */ | |
119 | #define GPMC_NR_IRQ 2 | |
120 | ||
121 | struct gpmc_client_irq { | |
122 | unsigned irq; | |
123 | u32 bitmask; | |
124 | }; | |
125 | ||
a2d3e7ba RN |
126 | /* Structure to save gpmc cs context */ |
127 | struct gpmc_cs_config { | |
128 | u32 config1; | |
129 | u32 config2; | |
130 | u32 config3; | |
131 | u32 config4; | |
132 | u32 config5; | |
133 | u32 config6; | |
134 | u32 config7; | |
135 | int is_valid; | |
136 | }; | |
137 | ||
138 | /* | |
139 | * Structure to save/restore gpmc context | |
140 | * to support core off on OMAP3 | |
141 | */ | |
142 | struct omap3_gpmc_regs { | |
143 | u32 sysconfig; | |
144 | u32 irqenable; | |
145 | u32 timeout_ctrl; | |
146 | u32 config; | |
147 | u32 prefetch_config1; | |
148 | u32 prefetch_config2; | |
149 | u32 prefetch_control; | |
150 | struct gpmc_cs_config cs_context[GPMC_CS_NUM]; | |
151 | }; | |
152 | ||
6b6c32fc AM |
153 | static struct gpmc_client_irq gpmc_client_irq[GPMC_NR_IRQ]; |
154 | static struct irq_chip gpmc_irq_chip; | |
af072196 | 155 | static int gpmc_irq_start; |
6b6c32fc | 156 | |
f37e4580 ID |
157 | static struct resource gpmc_mem_root; |
158 | static struct resource gpmc_cs_mem[GPMC_CS_NUM]; | |
87b247c4 | 159 | static DEFINE_SPINLOCK(gpmc_mem_lock); |
6797b4fe JH |
160 | /* Define chip-selects as reserved by default until probe completes */ |
161 | static unsigned int gpmc_cs_map = ((1 << GPMC_CS_NUM) - 1); | |
f34f3716 | 162 | static unsigned int gpmc_cs_num = GPMC_CS_NUM; |
9f833156 | 163 | static unsigned int gpmc_nr_waitpins; |
da496873 AM |
164 | static struct device *gpmc_dev; |
165 | static int gpmc_irq; | |
166 | static resource_size_t phys_base, mem_size; | |
167 | static unsigned gpmc_capability; | |
fd1dc87d | 168 | static void __iomem *gpmc_base; |
4bbbc1ad | 169 | |
fd1dc87d | 170 | static struct clk *gpmc_l3_clk; |
4bbbc1ad | 171 | |
db97eb7d SG |
172 | static irqreturn_t gpmc_handle_irq(int irq, void *dev); |
173 | ||
4bbbc1ad JY |
174 | static void gpmc_write_reg(int idx, u32 val) |
175 | { | |
edfaf05c | 176 | writel_relaxed(val, gpmc_base + idx); |
4bbbc1ad JY |
177 | } |
178 | ||
179 | static u32 gpmc_read_reg(int idx) | |
180 | { | |
edfaf05c | 181 | return readl_relaxed(gpmc_base + idx); |
4bbbc1ad JY |
182 | } |
183 | ||
184 | void gpmc_cs_write_reg(int cs, int idx, u32 val) | |
185 | { | |
186 | void __iomem *reg_addr; | |
187 | ||
948d38e7 | 188 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 189 | writel_relaxed(val, reg_addr); |
4bbbc1ad JY |
190 | } |
191 | ||
3fc089e7 | 192 | static u32 gpmc_cs_read_reg(int cs, int idx) |
4bbbc1ad | 193 | { |
fd1dc87d PW |
194 | void __iomem *reg_addr; |
195 | ||
948d38e7 | 196 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 197 | return readl_relaxed(reg_addr); |
4bbbc1ad JY |
198 | } |
199 | ||
fd1dc87d | 200 | /* TODO: Add support for gpmc_fck to clock framework and use it */ |
3fc089e7 | 201 | static unsigned long gpmc_get_fclk_period(void) |
4bbbc1ad | 202 | { |
fd1dc87d PW |
203 | unsigned long rate = clk_get_rate(gpmc_l3_clk); |
204 | ||
205 | if (rate == 0) { | |
206 | printk(KERN_WARNING "gpmc_l3_clk not enabled\n"); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | rate /= 1000; | |
211 | rate = 1000000000 / rate; /* In picoseconds */ | |
212 | ||
213 | return rate; | |
4bbbc1ad JY |
214 | } |
215 | ||
3fc089e7 | 216 | static unsigned int gpmc_ns_to_ticks(unsigned int time_ns) |
4bbbc1ad JY |
217 | { |
218 | unsigned long tick_ps; | |
219 | ||
220 | /* Calculate in picosecs to yield more exact results */ | |
221 | tick_ps = gpmc_get_fclk_period(); | |
222 | ||
223 | return (time_ns * 1000 + tick_ps - 1) / tick_ps; | |
224 | } | |
225 | ||
3fc089e7 | 226 | static unsigned int gpmc_ps_to_ticks(unsigned int time_ps) |
a3551f5b AH |
227 | { |
228 | unsigned long tick_ps; | |
229 | ||
230 | /* Calculate in picosecs to yield more exact results */ | |
231 | tick_ps = gpmc_get_fclk_period(); | |
232 | ||
233 | return (time_ps + tick_ps - 1) / tick_ps; | |
234 | } | |
235 | ||
fd1dc87d PW |
236 | unsigned int gpmc_ticks_to_ns(unsigned int ticks) |
237 | { | |
238 | return ticks * gpmc_get_fclk_period() / 1000; | |
239 | } | |
240 | ||
246da26d AM |
241 | static unsigned int gpmc_ticks_to_ps(unsigned int ticks) |
242 | { | |
243 | return ticks * gpmc_get_fclk_period(); | |
244 | } | |
245 | ||
246 | static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps) | |
247 | { | |
248 | unsigned long ticks = gpmc_ps_to_ticks(time_ps); | |
249 | ||
250 | return ticks * gpmc_get_fclk_period(); | |
251 | } | |
252 | ||
559d94b0 AM |
253 | static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value) |
254 | { | |
255 | u32 l; | |
256 | ||
257 | l = gpmc_cs_read_reg(cs, reg); | |
258 | if (value) | |
259 | l |= mask; | |
260 | else | |
261 | l &= ~mask; | |
262 | gpmc_cs_write_reg(cs, reg, l); | |
263 | } | |
264 | ||
265 | static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p) | |
266 | { | |
267 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1, | |
268 | GPMC_CONFIG1_TIME_PARA_GRAN, | |
269 | p->time_para_granularity); | |
270 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2, | |
271 | GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay); | |
272 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3, | |
273 | GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay); | |
274 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
275 | GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay); | |
276 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
277 | GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay); | |
278 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, | |
279 | GPMC_CONFIG6_CYCLE2CYCLESAMECSEN, | |
280 | p->cycle2cyclesamecsen); | |
281 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, | |
282 | GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN, | |
283 | p->cycle2cyclediffcsen); | |
284 | } | |
285 | ||
4bbbc1ad JY |
286 | #ifdef DEBUG |
287 | static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, | |
2aab6468 | 288 | int time, const char *name) |
4bbbc1ad JY |
289 | #else |
290 | static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, | |
291 | int time) | |
292 | #endif | |
293 | { | |
294 | u32 l; | |
295 | int ticks, mask, nr_bits; | |
296 | ||
297 | if (time == 0) | |
298 | ticks = 0; | |
299 | else | |
300 | ticks = gpmc_ns_to_ticks(time); | |
301 | nr_bits = end_bit - st_bit + 1; | |
1c22cc13 DB |
302 | if (ticks >= 1 << nr_bits) { |
303 | #ifdef DEBUG | |
304 | printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n", | |
305 | cs, name, time, ticks, 1 << nr_bits); | |
306 | #endif | |
4bbbc1ad | 307 | return -1; |
1c22cc13 | 308 | } |
4bbbc1ad JY |
309 | |
310 | mask = (1 << nr_bits) - 1; | |
311 | l = gpmc_cs_read_reg(cs, reg); | |
312 | #ifdef DEBUG | |
1c22cc13 DB |
313 | printk(KERN_INFO |
314 | "GPMC CS%d: %-10s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n", | |
2aab6468 | 315 | cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000, |
1c22cc13 | 316 | (l >> st_bit) & mask, time); |
4bbbc1ad JY |
317 | #endif |
318 | l &= ~(mask << st_bit); | |
319 | l |= ticks << st_bit; | |
320 | gpmc_cs_write_reg(cs, reg, l); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | #ifdef DEBUG | |
326 | #define GPMC_SET_ONE(reg, st, end, field) \ | |
327 | if (set_gpmc_timing_reg(cs, (reg), (st), (end), \ | |
328 | t->field, #field) < 0) \ | |
329 | return -1 | |
330 | #else | |
331 | #define GPMC_SET_ONE(reg, st, end, field) \ | |
332 | if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \ | |
333 | return -1 | |
334 | #endif | |
335 | ||
1b47ca1a | 336 | int gpmc_calc_divider(unsigned int sync_clk) |
4bbbc1ad JY |
337 | { |
338 | int div; | |
339 | u32 l; | |
340 | ||
a3551f5b | 341 | l = sync_clk + (gpmc_get_fclk_period() - 1); |
4bbbc1ad JY |
342 | div = l / gpmc_get_fclk_period(); |
343 | if (div > 4) | |
344 | return -1; | |
1c22cc13 | 345 | if (div <= 0) |
4bbbc1ad JY |
346 | div = 1; |
347 | ||
348 | return div; | |
349 | } | |
350 | ||
351 | int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t) | |
352 | { | |
353 | int div; | |
354 | u32 l; | |
355 | ||
1b47ca1a | 356 | div = gpmc_calc_divider(t->sync_clk); |
4bbbc1ad | 357 | if (div < 0) |
a032d33b | 358 | return div; |
4bbbc1ad JY |
359 | |
360 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on); | |
361 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off); | |
362 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off); | |
363 | ||
364 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on); | |
365 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off); | |
366 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off); | |
367 | ||
368 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on); | |
369 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off); | |
370 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on); | |
371 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off); | |
372 | ||
373 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle); | |
374 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle); | |
375 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access); | |
376 | ||
377 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access); | |
378 | ||
559d94b0 AM |
379 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround); |
380 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay); | |
381 | ||
382 | GPMC_SET_ONE(GPMC_CS_CONFIG1, 18, 19, wait_monitoring); | |
383 | GPMC_SET_ONE(GPMC_CS_CONFIG1, 25, 26, clk_activation); | |
384 | ||
da496873 | 385 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) |
cc26b3b0 | 386 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus); |
da496873 | 387 | if (gpmc_capability & GPMC_HAS_WR_ACCESS) |
cc26b3b0 | 388 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access); |
cc26b3b0 | 389 | |
1c22cc13 DB |
390 | /* caller is expected to have initialized CONFIG1 to cover |
391 | * at least sync vs async | |
392 | */ | |
393 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); | |
394 | if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) { | |
4bbbc1ad | 395 | #ifdef DEBUG |
1c22cc13 DB |
396 | printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n", |
397 | cs, (div * gpmc_get_fclk_period()) / 1000, div); | |
4bbbc1ad | 398 | #endif |
1c22cc13 DB |
399 | l &= ~0x03; |
400 | l |= (div - 1); | |
401 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); | |
402 | } | |
4bbbc1ad | 403 | |
559d94b0 AM |
404 | gpmc_cs_bool_timings(cs, &t->bool_timings); |
405 | ||
4bbbc1ad JY |
406 | return 0; |
407 | } | |
408 | ||
c71f8e9b | 409 | static int gpmc_cs_enable_mem(int cs, u32 base, u32 size) |
f37e4580 ID |
410 | { |
411 | u32 l; | |
412 | u32 mask; | |
413 | ||
c71f8e9b JH |
414 | /* |
415 | * Ensure that base address is aligned on a | |
416 | * boundary equal to or greater than size. | |
417 | */ | |
418 | if (base & (size - 1)) | |
419 | return -EINVAL; | |
420 | ||
f37e4580 ID |
421 | mask = (1 << GPMC_SECTION_SHIFT) - size; |
422 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
423 | l &= ~0x3f; | |
424 | l = (base >> GPMC_CHUNK_SHIFT) & 0x3f; | |
425 | l &= ~(0x0f << 8); | |
426 | l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8; | |
a2d3e7ba | 427 | l |= GPMC_CONFIG7_CSVALID; |
f37e4580 | 428 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
c71f8e9b JH |
429 | |
430 | return 0; | |
f37e4580 ID |
431 | } |
432 | ||
433 | static void gpmc_cs_disable_mem(int cs) | |
434 | { | |
435 | u32 l; | |
436 | ||
437 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 438 | l &= ~GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
439 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
440 | } | |
441 | ||
442 | static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size) | |
443 | { | |
444 | u32 l; | |
445 | u32 mask; | |
446 | ||
447 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
448 | *base = (l & 0x3f) << GPMC_CHUNK_SHIFT; | |
449 | mask = (l >> 8) & 0x0f; | |
450 | *size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT); | |
451 | } | |
452 | ||
453 | static int gpmc_cs_mem_enabled(int cs) | |
454 | { | |
455 | u32 l; | |
456 | ||
457 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 458 | return l & GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
459 | } |
460 | ||
f5d8edaf | 461 | static void gpmc_cs_set_reserved(int cs, int reserved) |
4bbbc1ad | 462 | { |
f37e4580 ID |
463 | gpmc_cs_map &= ~(1 << cs); |
464 | gpmc_cs_map |= (reserved ? 1 : 0) << cs; | |
465 | } | |
466 | ||
ae9d908a | 467 | static bool gpmc_cs_reserved(int cs) |
f37e4580 ID |
468 | { |
469 | return gpmc_cs_map & (1 << cs); | |
470 | } | |
471 | ||
472 | static unsigned long gpmc_mem_align(unsigned long size) | |
473 | { | |
474 | int order; | |
475 | ||
476 | size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1); | |
477 | order = GPMC_CHUNK_SHIFT - 1; | |
478 | do { | |
479 | size >>= 1; | |
480 | order++; | |
481 | } while (size); | |
482 | size = 1 << order; | |
483 | return size; | |
484 | } | |
485 | ||
486 | static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size) | |
487 | { | |
488 | struct resource *res = &gpmc_cs_mem[cs]; | |
489 | int r; | |
490 | ||
491 | size = gpmc_mem_align(size); | |
492 | spin_lock(&gpmc_mem_lock); | |
493 | res->start = base; | |
494 | res->end = base + size - 1; | |
495 | r = request_resource(&gpmc_mem_root, res); | |
496 | spin_unlock(&gpmc_mem_lock); | |
497 | ||
498 | return r; | |
499 | } | |
500 | ||
da496873 AM |
501 | static int gpmc_cs_delete_mem(int cs) |
502 | { | |
503 | struct resource *res = &gpmc_cs_mem[cs]; | |
504 | int r; | |
505 | ||
506 | spin_lock(&gpmc_mem_lock); | |
efe80723 | 507 | r = release_resource(res); |
da496873 AM |
508 | res->start = 0; |
509 | res->end = 0; | |
510 | spin_unlock(&gpmc_mem_lock); | |
511 | ||
512 | return r; | |
513 | } | |
514 | ||
cdd6928c JH |
515 | /** |
516 | * gpmc_cs_remap - remaps a chip-select physical base address | |
517 | * @cs: chip-select to remap | |
518 | * @base: physical base address to re-map chip-select to | |
519 | * | |
520 | * Re-maps a chip-select to a new physical base address specified by | |
521 | * "base". Returns 0 on success and appropriate negative error code | |
522 | * on failure. | |
523 | */ | |
524 | static int gpmc_cs_remap(int cs, u32 base) | |
525 | { | |
526 | int ret; | |
527 | u32 old_base, size; | |
528 | ||
f34f3716 GP |
529 | if (cs > gpmc_cs_num) { |
530 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
cdd6928c | 531 | return -ENODEV; |
f34f3716 | 532 | } |
fb677ef7 TL |
533 | |
534 | /* | |
535 | * Make sure we ignore any device offsets from the GPMC partition | |
536 | * allocated for the chip select and that the new base confirms | |
537 | * to the GPMC 16MB minimum granularity. | |
538 | */ | |
539 | base &= ~(SZ_16M - 1); | |
540 | ||
cdd6928c JH |
541 | gpmc_cs_get_memconf(cs, &old_base, &size); |
542 | if (base == old_base) | |
543 | return 0; | |
544 | gpmc_cs_disable_mem(cs); | |
545 | ret = gpmc_cs_delete_mem(cs); | |
546 | if (ret < 0) | |
547 | return ret; | |
548 | ret = gpmc_cs_insert_mem(cs, base, size); | |
549 | if (ret < 0) | |
550 | return ret; | |
c71f8e9b JH |
551 | ret = gpmc_cs_enable_mem(cs, base, size); |
552 | if (ret < 0) | |
553 | return ret; | |
cdd6928c JH |
554 | |
555 | return 0; | |
556 | } | |
557 | ||
f37e4580 ID |
558 | int gpmc_cs_request(int cs, unsigned long size, unsigned long *base) |
559 | { | |
560 | struct resource *res = &gpmc_cs_mem[cs]; | |
561 | int r = -1; | |
562 | ||
f34f3716 GP |
563 | if (cs > gpmc_cs_num) { |
564 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
f37e4580 | 565 | return -ENODEV; |
f34f3716 | 566 | } |
f37e4580 ID |
567 | size = gpmc_mem_align(size); |
568 | if (size > (1 << GPMC_SECTION_SHIFT)) | |
569 | return -ENOMEM; | |
570 | ||
571 | spin_lock(&gpmc_mem_lock); | |
572 | if (gpmc_cs_reserved(cs)) { | |
573 | r = -EBUSY; | |
574 | goto out; | |
575 | } | |
576 | if (gpmc_cs_mem_enabled(cs)) | |
577 | r = adjust_resource(res, res->start & ~(size - 1), size); | |
578 | if (r < 0) | |
579 | r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0, | |
580 | size, NULL, NULL); | |
581 | if (r < 0) | |
582 | goto out; | |
583 | ||
c71f8e9b JH |
584 | r = gpmc_cs_enable_mem(cs, res->start, resource_size(res)); |
585 | if (r < 0) { | |
586 | release_resource(res); | |
587 | goto out; | |
588 | } | |
589 | ||
f37e4580 ID |
590 | *base = res->start; |
591 | gpmc_cs_set_reserved(cs, 1); | |
592 | out: | |
593 | spin_unlock(&gpmc_mem_lock); | |
594 | return r; | |
595 | } | |
fd1dc87d | 596 | EXPORT_SYMBOL(gpmc_cs_request); |
f37e4580 ID |
597 | |
598 | void gpmc_cs_free(int cs) | |
599 | { | |
efe80723 TL |
600 | struct resource *res = &gpmc_cs_mem[cs]; |
601 | ||
f37e4580 | 602 | spin_lock(&gpmc_mem_lock); |
f34f3716 | 603 | if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) { |
f37e4580 ID |
604 | printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs); |
605 | BUG(); | |
606 | spin_unlock(&gpmc_mem_lock); | |
607 | return; | |
608 | } | |
609 | gpmc_cs_disable_mem(cs); | |
efe80723 TL |
610 | if (res->flags) |
611 | release_resource(res); | |
f37e4580 ID |
612 | gpmc_cs_set_reserved(cs, 0); |
613 | spin_unlock(&gpmc_mem_lock); | |
614 | } | |
fd1dc87d | 615 | EXPORT_SYMBOL(gpmc_cs_free); |
f37e4580 | 616 | |
948d38e7 | 617 | /** |
3a544354 | 618 | * gpmc_configure - write request to configure gpmc |
948d38e7 SG |
619 | * @cmd: command type |
620 | * @wval: value to write | |
621 | * @return status of the operation | |
622 | */ | |
3a544354 | 623 | int gpmc_configure(int cmd, int wval) |
948d38e7 | 624 | { |
3a544354 | 625 | u32 regval; |
948d38e7 SG |
626 | |
627 | switch (cmd) { | |
db97eb7d SG |
628 | case GPMC_ENABLE_IRQ: |
629 | gpmc_write_reg(GPMC_IRQENABLE, wval); | |
630 | break; | |
631 | ||
948d38e7 SG |
632 | case GPMC_SET_IRQ_STATUS: |
633 | gpmc_write_reg(GPMC_IRQSTATUS, wval); | |
634 | break; | |
635 | ||
636 | case GPMC_CONFIG_WP: | |
637 | regval = gpmc_read_reg(GPMC_CONFIG); | |
638 | if (wval) | |
639 | regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */ | |
640 | else | |
641 | regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */ | |
642 | gpmc_write_reg(GPMC_CONFIG, regval); | |
643 | break; | |
644 | ||
948d38e7 | 645 | default: |
3a544354 JH |
646 | pr_err("%s: command not supported\n", __func__); |
647 | return -EINVAL; | |
948d38e7 SG |
648 | } |
649 | ||
3a544354 | 650 | return 0; |
948d38e7 | 651 | } |
3a544354 | 652 | EXPORT_SYMBOL(gpmc_configure); |
948d38e7 | 653 | |
52bd138d AM |
654 | void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs) |
655 | { | |
2fdf0c98 AM |
656 | int i; |
657 | ||
52bd138d AM |
658 | reg->gpmc_status = gpmc_base + GPMC_STATUS; |
659 | reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET + | |
660 | GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs; | |
661 | reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET + | |
662 | GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs; | |
663 | reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET + | |
664 | GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs; | |
665 | reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1; | |
666 | reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2; | |
667 | reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL; | |
668 | reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS; | |
669 | reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG; | |
670 | reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL; | |
671 | reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG; | |
672 | reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT; | |
2fdf0c98 AM |
673 | |
674 | for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) { | |
675 | reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 + | |
676 | GPMC_BCH_SIZE * i; | |
677 | reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 + | |
678 | GPMC_BCH_SIZE * i; | |
679 | reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 + | |
680 | GPMC_BCH_SIZE * i; | |
681 | reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 + | |
682 | GPMC_BCH_SIZE * i; | |
27c9fd60 | 683 | reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 + |
684 | i * GPMC_BCH_SIZE; | |
685 | reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 + | |
686 | i * GPMC_BCH_SIZE; | |
687 | reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 + | |
688 | i * GPMC_BCH_SIZE; | |
2fdf0c98 | 689 | } |
52bd138d AM |
690 | } |
691 | ||
6b6c32fc AM |
692 | int gpmc_get_client_irq(unsigned irq_config) |
693 | { | |
694 | int i; | |
695 | ||
696 | if (hweight32(irq_config) > 1) | |
697 | return 0; | |
698 | ||
699 | for (i = 0; i < GPMC_NR_IRQ; i++) | |
700 | if (gpmc_client_irq[i].bitmask & irq_config) | |
701 | return gpmc_client_irq[i].irq; | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
706 | static int gpmc_irq_endis(unsigned irq, bool endis) | |
707 | { | |
708 | int i; | |
709 | u32 regval; | |
710 | ||
711 | for (i = 0; i < GPMC_NR_IRQ; i++) | |
712 | if (irq == gpmc_client_irq[i].irq) { | |
713 | regval = gpmc_read_reg(GPMC_IRQENABLE); | |
714 | if (endis) | |
715 | regval |= gpmc_client_irq[i].bitmask; | |
716 | else | |
717 | regval &= ~gpmc_client_irq[i].bitmask; | |
718 | gpmc_write_reg(GPMC_IRQENABLE, regval); | |
719 | break; | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static void gpmc_irq_disable(struct irq_data *p) | |
726 | { | |
727 | gpmc_irq_endis(p->irq, false); | |
728 | } | |
729 | ||
730 | static void gpmc_irq_enable(struct irq_data *p) | |
731 | { | |
732 | gpmc_irq_endis(p->irq, true); | |
733 | } | |
734 | ||
735 | static void gpmc_irq_noop(struct irq_data *data) { } | |
736 | ||
737 | static unsigned int gpmc_irq_noop_ret(struct irq_data *data) { return 0; } | |
738 | ||
da496873 | 739 | static int gpmc_setup_irq(void) |
6b6c32fc AM |
740 | { |
741 | int i; | |
742 | u32 regval; | |
743 | ||
744 | if (!gpmc_irq) | |
745 | return -EINVAL; | |
746 | ||
747 | gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0); | |
71856843 | 748 | if (gpmc_irq_start < 0) { |
6b6c32fc AM |
749 | pr_err("irq_alloc_descs failed\n"); |
750 | return gpmc_irq_start; | |
751 | } | |
752 | ||
753 | gpmc_irq_chip.name = "gpmc"; | |
754 | gpmc_irq_chip.irq_startup = gpmc_irq_noop_ret; | |
755 | gpmc_irq_chip.irq_enable = gpmc_irq_enable; | |
756 | gpmc_irq_chip.irq_disable = gpmc_irq_disable; | |
757 | gpmc_irq_chip.irq_shutdown = gpmc_irq_noop; | |
758 | gpmc_irq_chip.irq_ack = gpmc_irq_noop; | |
759 | gpmc_irq_chip.irq_mask = gpmc_irq_noop; | |
760 | gpmc_irq_chip.irq_unmask = gpmc_irq_noop; | |
761 | ||
762 | gpmc_client_irq[0].bitmask = GPMC_IRQ_FIFOEVENTENABLE; | |
763 | gpmc_client_irq[1].bitmask = GPMC_IRQ_COUNT_EVENT; | |
764 | ||
765 | for (i = 0; i < GPMC_NR_IRQ; i++) { | |
766 | gpmc_client_irq[i].irq = gpmc_irq_start + i; | |
767 | irq_set_chip_and_handler(gpmc_client_irq[i].irq, | |
768 | &gpmc_irq_chip, handle_simple_irq); | |
769 | set_irq_flags(gpmc_client_irq[i].irq, | |
770 | IRQF_VALID | IRQF_NOAUTOEN); | |
771 | } | |
772 | ||
773 | /* Disable interrupts */ | |
774 | gpmc_write_reg(GPMC_IRQENABLE, 0); | |
775 | ||
776 | /* clear interrupts */ | |
777 | regval = gpmc_read_reg(GPMC_IRQSTATUS); | |
778 | gpmc_write_reg(GPMC_IRQSTATUS, regval); | |
779 | ||
780 | return request_irq(gpmc_irq, gpmc_handle_irq, 0, "gpmc", NULL); | |
781 | } | |
782 | ||
351a102d | 783 | static int gpmc_free_irq(void) |
da496873 AM |
784 | { |
785 | int i; | |
786 | ||
787 | if (gpmc_irq) | |
788 | free_irq(gpmc_irq, NULL); | |
789 | ||
790 | for (i = 0; i < GPMC_NR_IRQ; i++) { | |
791 | irq_set_handler(gpmc_client_irq[i].irq, NULL); | |
792 | irq_set_chip(gpmc_client_irq[i].irq, &no_irq_chip); | |
793 | irq_modify_status(gpmc_client_irq[i].irq, 0, 0); | |
794 | } | |
795 | ||
796 | irq_free_descs(gpmc_irq_start, GPMC_NR_IRQ); | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
351a102d | 801 | static void gpmc_mem_exit(void) |
da496873 AM |
802 | { |
803 | int cs; | |
804 | ||
f34f3716 | 805 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
da496873 AM |
806 | if (!gpmc_cs_mem_enabled(cs)) |
807 | continue; | |
808 | gpmc_cs_delete_mem(cs); | |
809 | } | |
810 | ||
811 | } | |
812 | ||
84b00f0e | 813 | static void gpmc_mem_init(void) |
f37e4580 | 814 | { |
84b00f0e | 815 | int cs; |
f37e4580 | 816 | |
bf234397 JH |
817 | /* |
818 | * The first 1MB of GPMC address space is typically mapped to | |
819 | * the internal ROM. Never allocate the first page, to | |
820 | * facilitate bug detection; even if we didn't boot from ROM. | |
7f245162 | 821 | */ |
bf234397 | 822 | gpmc_mem_root.start = SZ_1M; |
f37e4580 ID |
823 | gpmc_mem_root.end = GPMC_MEM_END; |
824 | ||
825 | /* Reserve all regions that has been set up by bootloader */ | |
f34f3716 | 826 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
f37e4580 ID |
827 | u32 base, size; |
828 | ||
829 | if (!gpmc_cs_mem_enabled(cs)) | |
830 | continue; | |
831 | gpmc_cs_get_memconf(cs, &base, &size); | |
84b00f0e JH |
832 | if (gpmc_cs_insert_mem(cs, base, size)) { |
833 | pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n", | |
834 | __func__, cs, base, base + size); | |
835 | gpmc_cs_disable_mem(cs); | |
8119024e | 836 | } |
f37e4580 | 837 | } |
4bbbc1ad JY |
838 | } |
839 | ||
246da26d AM |
840 | static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk) |
841 | { | |
842 | u32 temp; | |
843 | int div; | |
844 | ||
845 | div = gpmc_calc_divider(sync_clk); | |
846 | temp = gpmc_ps_to_ticks(time_ps); | |
847 | temp = (temp + div - 1) / div; | |
848 | return gpmc_ticks_to_ps(temp * div); | |
849 | } | |
850 | ||
851 | /* XXX: can the cycles be avoided ? */ | |
852 | static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
853 | struct gpmc_device_timings *dev_t, |
854 | bool mux) | |
246da26d | 855 | { |
246da26d AM |
856 | u32 temp; |
857 | ||
858 | /* adv_rd_off */ | |
859 | temp = dev_t->t_avdp_r; | |
860 | /* XXX: mux check required ? */ | |
861 | if (mux) { | |
862 | /* XXX: t_avdp not to be required for sync, only added for tusb | |
863 | * this indirectly necessitates requirement of t_avdp_r and | |
864 | * t_avdp_w instead of having a single t_avdp | |
865 | */ | |
866 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh); | |
867 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
868 | } | |
869 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
870 | ||
871 | /* oe_on */ | |
872 | temp = dev_t->t_oeasu; /* XXX: remove this ? */ | |
873 | if (mux) { | |
874 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach); | |
875 | temp = max_t(u32, temp, gpmc_t->adv_rd_off + | |
876 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe)); | |
877 | } | |
878 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); | |
879 | ||
880 | /* access */ | |
881 | /* XXX: any scope for improvement ?, by combining oe_on | |
882 | * and clk_activation, need to check whether | |
883 | * access = clk_activation + round to sync clk ? | |
884 | */ | |
885 | temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk); | |
886 | temp += gpmc_t->clk_activation; | |
887 | if (dev_t->cyc_oe) | |
888 | temp = max_t(u32, temp, gpmc_t->oe_on + | |
889 | gpmc_ticks_to_ps(dev_t->cyc_oe)); | |
890 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); | |
891 | ||
892 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
893 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
894 | ||
895 | /* rd_cycle */ | |
896 | temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez); | |
897 | temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) + | |
898 | gpmc_t->access; | |
899 | /* XXX: barter t_ce_rdyz with t_cez_r ? */ | |
900 | if (dev_t->t_ce_rdyz) | |
901 | temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz); | |
902 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
908 | struct gpmc_device_timings *dev_t, |
909 | bool mux) | |
246da26d | 910 | { |
246da26d AM |
911 | u32 temp; |
912 | ||
913 | /* adv_wr_off */ | |
914 | temp = dev_t->t_avdp_w; | |
915 | if (mux) { | |
916 | temp = max_t(u32, temp, | |
917 | gpmc_t->clk_activation + dev_t->t_avdh); | |
918 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
919 | } | |
920 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
921 | ||
922 | /* wr_data_mux_bus */ | |
923 | temp = max_t(u32, dev_t->t_weasu, | |
924 | gpmc_t->clk_activation + dev_t->t_rdyo); | |
925 | /* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?, | |
926 | * and in that case remember to handle we_on properly | |
927 | */ | |
928 | if (mux) { | |
929 | temp = max_t(u32, temp, | |
930 | gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
931 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
932 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
933 | } | |
934 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
935 | ||
936 | /* we_on */ | |
937 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
938 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
939 | else | |
940 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
941 | ||
942 | /* wr_access */ | |
943 | /* XXX: gpmc_capability check reqd ? , even if not, will not harm */ | |
944 | gpmc_t->wr_access = gpmc_t->access; | |
945 | ||
946 | /* we_off */ | |
947 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
948 | temp = max_t(u32, temp, | |
949 | gpmc_t->wr_access + gpmc_ticks_to_ps(1)); | |
950 | temp = max_t(u32, temp, | |
951 | gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl)); | |
952 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
953 | ||
954 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
955 | dev_t->t_wph); | |
956 | ||
957 | /* wr_cycle */ | |
958 | temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk); | |
959 | temp += gpmc_t->wr_access; | |
960 | /* XXX: barter t_ce_rdyz with t_cez_w ? */ | |
961 | if (dev_t->t_ce_rdyz) | |
962 | temp = max_t(u32, temp, | |
963 | gpmc_t->cs_wr_off + dev_t->t_ce_rdyz); | |
964 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
969 | static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
970 | struct gpmc_device_timings *dev_t, |
971 | bool mux) | |
246da26d | 972 | { |
246da26d AM |
973 | u32 temp; |
974 | ||
975 | /* adv_rd_off */ | |
976 | temp = dev_t->t_avdp_r; | |
977 | if (mux) | |
978 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
979 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
980 | ||
981 | /* oe_on */ | |
982 | temp = dev_t->t_oeasu; | |
983 | if (mux) | |
984 | temp = max_t(u32, temp, | |
985 | gpmc_t->adv_rd_off + dev_t->t_aavdh); | |
986 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); | |
987 | ||
988 | /* access */ | |
989 | temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */ | |
990 | gpmc_t->oe_on + dev_t->t_oe); | |
991 | temp = max_t(u32, temp, | |
992 | gpmc_t->cs_on + dev_t->t_ce); | |
993 | temp = max_t(u32, temp, | |
994 | gpmc_t->adv_on + dev_t->t_aa); | |
995 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); | |
996 | ||
997 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
998 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
999 | ||
1000 | /* rd_cycle */ | |
1001 | temp = max_t(u32, dev_t->t_rd_cycle, | |
1002 | gpmc_t->cs_rd_off + dev_t->t_cez_r); | |
1003 | temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez); | |
1004 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1010 | struct gpmc_device_timings *dev_t, |
1011 | bool mux) | |
246da26d | 1012 | { |
246da26d AM |
1013 | u32 temp; |
1014 | ||
1015 | /* adv_wr_off */ | |
1016 | temp = dev_t->t_avdp_w; | |
1017 | if (mux) | |
1018 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1019 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1020 | ||
1021 | /* wr_data_mux_bus */ | |
1022 | temp = dev_t->t_weasu; | |
1023 | if (mux) { | |
1024 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1025 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1026 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1027 | } | |
1028 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1029 | ||
1030 | /* we_on */ | |
1031 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1032 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1033 | else | |
1034 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1035 | ||
1036 | /* we_off */ | |
1037 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1038 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1039 | ||
1040 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1041 | dev_t->t_wph); | |
1042 | ||
1043 | /* wr_cycle */ | |
1044 | temp = max_t(u32, dev_t->t_wr_cycle, | |
1045 | gpmc_t->cs_wr_off + dev_t->t_cez_w); | |
1046 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t, | |
1052 | struct gpmc_device_timings *dev_t) | |
1053 | { | |
1054 | u32 temp; | |
1055 | ||
1056 | gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) * | |
1057 | gpmc_get_fclk_period(); | |
1058 | ||
1059 | gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk( | |
1060 | dev_t->t_bacc, | |
1061 | gpmc_t->sync_clk); | |
1062 | ||
1063 | temp = max_t(u32, dev_t->t_ces, dev_t->t_avds); | |
1064 | gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp); | |
1065 | ||
1066 | if (gpmc_calc_divider(gpmc_t->sync_clk) != 1) | |
1067 | return 0; | |
1068 | ||
1069 | if (dev_t->ce_xdelay) | |
1070 | gpmc_t->bool_timings.cs_extra_delay = true; | |
1071 | if (dev_t->avd_xdelay) | |
1072 | gpmc_t->bool_timings.adv_extra_delay = true; | |
1073 | if (dev_t->oe_xdelay) | |
1074 | gpmc_t->bool_timings.oe_extra_delay = true; | |
1075 | if (dev_t->we_xdelay) | |
1076 | gpmc_t->bool_timings.we_extra_delay = true; | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1082 | struct gpmc_device_timings *dev_t, |
1083 | bool sync) | |
246da26d AM |
1084 | { |
1085 | u32 temp; | |
1086 | ||
1087 | /* cs_on */ | |
1088 | gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu); | |
1089 | ||
1090 | /* adv_on */ | |
1091 | temp = dev_t->t_avdasu; | |
1092 | if (dev_t->t_ce_avd) | |
1093 | temp = max_t(u32, temp, | |
1094 | gpmc_t->cs_on + dev_t->t_ce_avd); | |
1095 | gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp); | |
1096 | ||
c3be5b45 | 1097 | if (sync) |
246da26d AM |
1098 | gpmc_calc_sync_common_timings(gpmc_t, dev_t); |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | /* TODO: remove this function once all peripherals are confirmed to | |
1104 | * work with generic timing. Simultaneously gpmc_cs_set_timings() | |
1105 | * has to be modified to handle timings in ps instead of ns | |
1106 | */ | |
1107 | static void gpmc_convert_ps_to_ns(struct gpmc_timings *t) | |
1108 | { | |
1109 | t->cs_on /= 1000; | |
1110 | t->cs_rd_off /= 1000; | |
1111 | t->cs_wr_off /= 1000; | |
1112 | t->adv_on /= 1000; | |
1113 | t->adv_rd_off /= 1000; | |
1114 | t->adv_wr_off /= 1000; | |
1115 | t->we_on /= 1000; | |
1116 | t->we_off /= 1000; | |
1117 | t->oe_on /= 1000; | |
1118 | t->oe_off /= 1000; | |
1119 | t->page_burst_access /= 1000; | |
1120 | t->access /= 1000; | |
1121 | t->rd_cycle /= 1000; | |
1122 | t->wr_cycle /= 1000; | |
1123 | t->bus_turnaround /= 1000; | |
1124 | t->cycle2cycle_delay /= 1000; | |
1125 | t->wait_monitoring /= 1000; | |
1126 | t->clk_activation /= 1000; | |
1127 | t->wr_access /= 1000; | |
1128 | t->wr_data_mux_bus /= 1000; | |
1129 | } | |
1130 | ||
1131 | int gpmc_calc_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1132 | struct gpmc_settings *gpmc_s, |
1133 | struct gpmc_device_timings *dev_t) | |
246da26d | 1134 | { |
c3be5b45 JH |
1135 | bool mux = false, sync = false; |
1136 | ||
1137 | if (gpmc_s) { | |
1138 | mux = gpmc_s->mux_add_data ? true : false; | |
1139 | sync = (gpmc_s->sync_read || gpmc_s->sync_write); | |
1140 | } | |
1141 | ||
246da26d AM |
1142 | memset(gpmc_t, 0, sizeof(*gpmc_t)); |
1143 | ||
c3be5b45 | 1144 | gpmc_calc_common_timings(gpmc_t, dev_t, sync); |
246da26d | 1145 | |
c3be5b45 JH |
1146 | if (gpmc_s && gpmc_s->sync_read) |
1147 | gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux); | |
246da26d | 1148 | else |
c3be5b45 | 1149 | gpmc_calc_async_read_timings(gpmc_t, dev_t, mux); |
246da26d | 1150 | |
c3be5b45 JH |
1151 | if (gpmc_s && gpmc_s->sync_write) |
1152 | gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux); | |
246da26d | 1153 | else |
c3be5b45 | 1154 | gpmc_calc_async_write_timings(gpmc_t, dev_t, mux); |
246da26d AM |
1155 | |
1156 | /* TODO: remove, see function definition */ | |
1157 | gpmc_convert_ps_to_ns(gpmc_t); | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
aa8d4767 JH |
1162 | /** |
1163 | * gpmc_cs_program_settings - programs non-timing related settings | |
1164 | * @cs: GPMC chip-select to program | |
1165 | * @p: pointer to GPMC settings structure | |
1166 | * | |
1167 | * Programs non-timing related settings for a GPMC chip-select, such as | |
1168 | * bus-width, burst configuration, etc. Function should be called once | |
1169 | * for each chip-select that is being used and must be called before | |
1170 | * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1 | |
1171 | * register will be initialised to zero by this function. Returns 0 on | |
1172 | * success and appropriate negative error code on failure. | |
1173 | */ | |
1174 | int gpmc_cs_program_settings(int cs, struct gpmc_settings *p) | |
1175 | { | |
1176 | u32 config1; | |
1177 | ||
1178 | if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) { | |
1179 | pr_err("%s: invalid width %d!", __func__, p->device_width); | |
1180 | return -EINVAL; | |
1181 | } | |
1182 | ||
1183 | /* Address-data multiplexing not supported for NAND devices */ | |
1184 | if (p->device_nand && p->mux_add_data) { | |
1185 | pr_err("%s: invalid configuration!\n", __func__); | |
1186 | return -EINVAL; | |
1187 | } | |
1188 | ||
1189 | if ((p->mux_add_data > GPMC_MUX_AD) || | |
1190 | ((p->mux_add_data == GPMC_MUX_AAD) && | |
1191 | !(gpmc_capability & GPMC_HAS_MUX_AAD))) { | |
1192 | pr_err("%s: invalid multiplex configuration!\n", __func__); | |
1193 | return -EINVAL; | |
1194 | } | |
1195 | ||
1196 | /* Page/burst mode supports lengths of 4, 8 and 16 bytes */ | |
1197 | if (p->burst_read || p->burst_write) { | |
1198 | switch (p->burst_len) { | |
1199 | case GPMC_BURST_4: | |
1200 | case GPMC_BURST_8: | |
1201 | case GPMC_BURST_16: | |
1202 | break; | |
1203 | default: | |
1204 | pr_err("%s: invalid page/burst-length (%d)\n", | |
1205 | __func__, p->burst_len); | |
1206 | return -EINVAL; | |
1207 | } | |
1208 | } | |
1209 | ||
2b54057c | 1210 | if (p->wait_pin > gpmc_nr_waitpins) { |
aa8d4767 JH |
1211 | pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin); |
1212 | return -EINVAL; | |
1213 | } | |
1214 | ||
1215 | config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1)); | |
1216 | ||
1217 | if (p->sync_read) | |
1218 | config1 |= GPMC_CONFIG1_READTYPE_SYNC; | |
1219 | if (p->sync_write) | |
1220 | config1 |= GPMC_CONFIG1_WRITETYPE_SYNC; | |
1221 | if (p->wait_on_read) | |
1222 | config1 |= GPMC_CONFIG1_WAIT_READ_MON; | |
1223 | if (p->wait_on_write) | |
1224 | config1 |= GPMC_CONFIG1_WAIT_WRITE_MON; | |
1225 | if (p->wait_on_read || p->wait_on_write) | |
1226 | config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin); | |
1227 | if (p->device_nand) | |
1228 | config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND); | |
1229 | if (p->mux_add_data) | |
1230 | config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data); | |
1231 | if (p->burst_read) | |
1232 | config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP; | |
1233 | if (p->burst_write) | |
1234 | config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP; | |
1235 | if (p->burst_read || p->burst_write) { | |
1236 | config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3); | |
1237 | config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0; | |
1238 | } | |
1239 | ||
1240 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1); | |
1241 | ||
1242 | return 0; | |
1243 | } | |
1244 | ||
bc6b1e7b | 1245 | #ifdef CONFIG_OF |
31957609 | 1246 | static const struct of_device_id gpmc_dt_ids[] = { |
bc6b1e7b DM |
1247 | { .compatible = "ti,omap2420-gpmc" }, |
1248 | { .compatible = "ti,omap2430-gpmc" }, | |
1249 | { .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */ | |
1250 | { .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */ | |
1251 | { .compatible = "ti,am3352-gpmc" }, /* am335x devices */ | |
1252 | { } | |
1253 | }; | |
1254 | MODULE_DEVICE_TABLE(of, gpmc_dt_ids); | |
1255 | ||
8c8a7771 JH |
1256 | /** |
1257 | * gpmc_read_settings_dt - read gpmc settings from device-tree | |
1258 | * @np: pointer to device-tree node for a gpmc child device | |
1259 | * @p: pointer to gpmc settings structure | |
1260 | * | |
1261 | * Reads the GPMC settings for a GPMC child device from device-tree and | |
1262 | * stores them in the GPMC settings structure passed. The GPMC settings | |
1263 | * structure is initialised to zero by this function and so any | |
1264 | * previously stored settings will be cleared. | |
1265 | */ | |
1266 | void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) | |
1267 | { | |
1268 | memset(p, 0, sizeof(struct gpmc_settings)); | |
1269 | ||
1270 | p->sync_read = of_property_read_bool(np, "gpmc,sync-read"); | |
1271 | p->sync_write = of_property_read_bool(np, "gpmc,sync-write"); | |
8c8a7771 JH |
1272 | of_property_read_u32(np, "gpmc,device-width", &p->device_width); |
1273 | of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data); | |
1274 | ||
1275 | if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) { | |
1276 | p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap"); | |
1277 | p->burst_read = of_property_read_bool(np, "gpmc,burst-read"); | |
1278 | p->burst_write = of_property_read_bool(np, "gpmc,burst-write"); | |
1279 | if (!p->burst_read && !p->burst_write) | |
1280 | pr_warn("%s: page/burst-length set but not used!\n", | |
1281 | __func__); | |
1282 | } | |
1283 | ||
1284 | if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) { | |
1285 | p->wait_on_read = of_property_read_bool(np, | |
1286 | "gpmc,wait-on-read"); | |
1287 | p->wait_on_write = of_property_read_bool(np, | |
1288 | "gpmc,wait-on-write"); | |
1289 | if (!p->wait_on_read && !p->wait_on_write) | |
2b54057c RQ |
1290 | pr_debug("%s: rd/wr wait monitoring not enabled!\n", |
1291 | __func__); | |
8c8a7771 JH |
1292 | } |
1293 | } | |
1294 | ||
bc6b1e7b DM |
1295 | static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, |
1296 | struct gpmc_timings *gpmc_t) | |
1297 | { | |
d36b4cd4 JH |
1298 | struct gpmc_bool_timings *p; |
1299 | ||
1300 | if (!np || !gpmc_t) | |
1301 | return; | |
bc6b1e7b DM |
1302 | |
1303 | memset(gpmc_t, 0, sizeof(*gpmc_t)); | |
1304 | ||
1305 | /* minimum clock period for syncronous mode */ | |
d36b4cd4 | 1306 | of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk); |
bc6b1e7b DM |
1307 | |
1308 | /* chip select timtings */ | |
d36b4cd4 JH |
1309 | of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on); |
1310 | of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off); | |
1311 | of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off); | |
bc6b1e7b DM |
1312 | |
1313 | /* ADV signal timings */ | |
d36b4cd4 JH |
1314 | of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on); |
1315 | of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off); | |
1316 | of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off); | |
bc6b1e7b DM |
1317 | |
1318 | /* WE signal timings */ | |
d36b4cd4 JH |
1319 | of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on); |
1320 | of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off); | |
bc6b1e7b DM |
1321 | |
1322 | /* OE signal timings */ | |
d36b4cd4 JH |
1323 | of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on); |
1324 | of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off); | |
bc6b1e7b DM |
1325 | |
1326 | /* access and cycle timings */ | |
d36b4cd4 JH |
1327 | of_property_read_u32(np, "gpmc,page-burst-access-ns", |
1328 | &gpmc_t->page_burst_access); | |
1329 | of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access); | |
1330 | of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle); | |
1331 | of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle); | |
1332 | of_property_read_u32(np, "gpmc,bus-turnaround-ns", | |
1333 | &gpmc_t->bus_turnaround); | |
1334 | of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns", | |
1335 | &gpmc_t->cycle2cycle_delay); | |
1336 | of_property_read_u32(np, "gpmc,wait-monitoring-ns", | |
1337 | &gpmc_t->wait_monitoring); | |
1338 | of_property_read_u32(np, "gpmc,clk-activation-ns", | |
1339 | &gpmc_t->clk_activation); | |
1340 | ||
1341 | /* only applicable to OMAP3+ */ | |
1342 | of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access); | |
1343 | of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns", | |
1344 | &gpmc_t->wr_data_mux_bus); | |
1345 | ||
1346 | /* bool timing parameters */ | |
1347 | p = &gpmc_t->bool_timings; | |
1348 | ||
1349 | p->cycle2cyclediffcsen = | |
1350 | of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen"); | |
1351 | p->cycle2cyclesamecsen = | |
1352 | of_property_read_bool(np, "gpmc,cycle2cycle-samecsen"); | |
1353 | p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay"); | |
1354 | p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay"); | |
1355 | p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay"); | |
1356 | p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay"); | |
1357 | p->time_para_granularity = | |
1358 | of_property_read_bool(np, "gpmc,time-para-granularity"); | |
bc6b1e7b DM |
1359 | } |
1360 | ||
6b187b21 | 1361 | #if IS_ENABLED(CONFIG_MTD_NAND) |
bc6b1e7b | 1362 | |
496c8a0b MJ |
1363 | static const char * const nand_xfer_types[] = { |
1364 | [NAND_OMAP_PREFETCH_POLLED] = "prefetch-polled", | |
1365 | [NAND_OMAP_POLLED] = "polled", | |
1366 | [NAND_OMAP_PREFETCH_DMA] = "prefetch-dma", | |
1367 | [NAND_OMAP_PREFETCH_IRQ] = "prefetch-irq", | |
1368 | }; | |
1369 | ||
bc6b1e7b DM |
1370 | static int gpmc_probe_nand_child(struct platform_device *pdev, |
1371 | struct device_node *child) | |
1372 | { | |
1373 | u32 val; | |
1374 | const char *s; | |
1375 | struct gpmc_timings gpmc_t; | |
1376 | struct omap_nand_platform_data *gpmc_nand_data; | |
1377 | ||
1378 | if (of_property_read_u32(child, "reg", &val) < 0) { | |
1379 | dev_err(&pdev->dev, "%s has no 'reg' property\n", | |
1380 | child->full_name); | |
1381 | return -ENODEV; | |
1382 | } | |
1383 | ||
1384 | gpmc_nand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_nand_data), | |
1385 | GFP_KERNEL); | |
1386 | if (!gpmc_nand_data) | |
1387 | return -ENOMEM; | |
1388 | ||
1389 | gpmc_nand_data->cs = val; | |
1390 | gpmc_nand_data->of_node = child; | |
1391 | ||
ac65caf5 PG |
1392 | /* Detect availability of ELM module */ |
1393 | gpmc_nand_data->elm_of_node = of_parse_phandle(child, "ti,elm-id", 0); | |
1394 | if (gpmc_nand_data->elm_of_node == NULL) | |
1395 | gpmc_nand_data->elm_of_node = | |
1396 | of_parse_phandle(child, "elm_id", 0); | |
1397 | if (gpmc_nand_data->elm_of_node == NULL) | |
1398 | pr_warn("%s: ti,elm-id property not found\n", __func__); | |
1399 | ||
1400 | /* select ecc-scheme for NAND */ | |
1401 | if (of_property_read_string(child, "ti,nand-ecc-opt", &s)) { | |
1402 | pr_err("%s: ti,nand-ecc-opt not found\n", __func__); | |
1403 | return -ENODEV; | |
1404 | } | |
a3e83f05 RQ |
1405 | |
1406 | if (!strcmp(s, "sw")) | |
1407 | gpmc_nand_data->ecc_opt = OMAP_ECC_HAM1_CODE_SW; | |
1408 | else if (!strcmp(s, "ham1") || | |
1409 | !strcmp(s, "hw") || !strcmp(s, "hw-romcode")) | |
ac65caf5 PG |
1410 | gpmc_nand_data->ecc_opt = |
1411 | OMAP_ECC_HAM1_CODE_HW; | |
1412 | else if (!strcmp(s, "bch4")) | |
1413 | if (gpmc_nand_data->elm_of_node) | |
1414 | gpmc_nand_data->ecc_opt = | |
1415 | OMAP_ECC_BCH4_CODE_HW; | |
1416 | else | |
1417 | gpmc_nand_data->ecc_opt = | |
1418 | OMAP_ECC_BCH4_CODE_HW_DETECTION_SW; | |
1419 | else if (!strcmp(s, "bch8")) | |
1420 | if (gpmc_nand_data->elm_of_node) | |
1421 | gpmc_nand_data->ecc_opt = | |
1422 | OMAP_ECC_BCH8_CODE_HW; | |
1423 | else | |
1424 | gpmc_nand_data->ecc_opt = | |
1425 | OMAP_ECC_BCH8_CODE_HW_DETECTION_SW; | |
27c9fd60 | 1426 | else if (!strcmp(s, "bch16")) |
1427 | if (gpmc_nand_data->elm_of_node) | |
1428 | gpmc_nand_data->ecc_opt = | |
1429 | OMAP_ECC_BCH16_CODE_HW; | |
1430 | else | |
1431 | pr_err("%s: BCH16 requires ELM support\n", __func__); | |
ac65caf5 PG |
1432 | else |
1433 | pr_err("%s: ti,nand-ecc-opt invalid value\n", __func__); | |
bc6b1e7b | 1434 | |
ac65caf5 | 1435 | /* select data transfer mode for NAND controller */ |
496c8a0b MJ |
1436 | if (!of_property_read_string(child, "ti,nand-xfer-type", &s)) |
1437 | for (val = 0; val < ARRAY_SIZE(nand_xfer_types); val++) | |
1438 | if (!strcasecmp(s, nand_xfer_types[val])) { | |
1439 | gpmc_nand_data->xfer_type = val; | |
1440 | break; | |
1441 | } | |
1442 | ||
fef775ca EG |
1443 | gpmc_nand_data->flash_bbt = of_get_nand_on_flash_bbt(child); |
1444 | ||
bc6b1e7b DM |
1445 | val = of_get_nand_bus_width(child); |
1446 | if (val == 16) | |
1447 | gpmc_nand_data->devsize = NAND_BUSWIDTH_16; | |
1448 | ||
1449 | gpmc_read_timings_dt(child, &gpmc_t); | |
1450 | gpmc_nand_init(gpmc_nand_data, &gpmc_t); | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | #else | |
1455 | static int gpmc_probe_nand_child(struct platform_device *pdev, | |
1456 | struct device_node *child) | |
1457 | { | |
1458 | return 0; | |
1459 | } | |
1460 | #endif | |
1461 | ||
980386d2 | 1462 | #if IS_ENABLED(CONFIG_MTD_ONENAND) |
75d3625e EG |
1463 | static int gpmc_probe_onenand_child(struct platform_device *pdev, |
1464 | struct device_node *child) | |
1465 | { | |
1466 | u32 val; | |
1467 | struct omap_onenand_platform_data *gpmc_onenand_data; | |
1468 | ||
1469 | if (of_property_read_u32(child, "reg", &val) < 0) { | |
1470 | dev_err(&pdev->dev, "%s has no 'reg' property\n", | |
1471 | child->full_name); | |
1472 | return -ENODEV; | |
1473 | } | |
1474 | ||
1475 | gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data), | |
1476 | GFP_KERNEL); | |
1477 | if (!gpmc_onenand_data) | |
1478 | return -ENOMEM; | |
1479 | ||
1480 | gpmc_onenand_data->cs = val; | |
1481 | gpmc_onenand_data->of_node = child; | |
1482 | gpmc_onenand_data->dma_channel = -1; | |
1483 | ||
1484 | if (!of_property_read_u32(child, "dma-channel", &val)) | |
1485 | gpmc_onenand_data->dma_channel = val; | |
1486 | ||
1487 | gpmc_onenand_init(gpmc_onenand_data); | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | #else | |
1492 | static int gpmc_probe_onenand_child(struct platform_device *pdev, | |
1493 | struct device_node *child) | |
1494 | { | |
1495 | return 0; | |
1496 | } | |
1497 | #endif | |
1498 | ||
cdd6928c | 1499 | /** |
3af91cf7 | 1500 | * gpmc_probe_generic_child - configures the gpmc for a child device |
cdd6928c | 1501 | * @pdev: pointer to gpmc platform device |
3af91cf7 | 1502 | * @child: pointer to device-tree node for child device |
cdd6928c | 1503 | * |
3af91cf7 | 1504 | * Allocates and configures a GPMC chip-select for a child device. |
cdd6928c JH |
1505 | * Returns 0 on success and appropriate negative error code on failure. |
1506 | */ | |
3af91cf7 | 1507 | static int gpmc_probe_generic_child(struct platform_device *pdev, |
cdd6928c JH |
1508 | struct device_node *child) |
1509 | { | |
1510 | struct gpmc_settings gpmc_s; | |
1511 | struct gpmc_timings gpmc_t; | |
1512 | struct resource res; | |
1513 | unsigned long base; | |
1514 | int ret, cs; | |
1515 | ||
1516 | if (of_property_read_u32(child, "reg", &cs) < 0) { | |
1517 | dev_err(&pdev->dev, "%s has no 'reg' property\n", | |
1518 | child->full_name); | |
1519 | return -ENODEV; | |
1520 | } | |
1521 | ||
1522 | if (of_address_to_resource(child, 0, &res) < 0) { | |
1523 | dev_err(&pdev->dev, "%s has malformed 'reg' property\n", | |
1524 | child->full_name); | |
1525 | return -ENODEV; | |
1526 | } | |
1527 | ||
1528 | ret = gpmc_cs_request(cs, resource_size(&res), &base); | |
1529 | if (ret < 0) { | |
1530 | dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs); | |
1531 | return ret; | |
1532 | } | |
1533 | ||
fd4446f2 TL |
1534 | /* |
1535 | * For some GPMC devices we still need to rely on the bootloader | |
1536 | * timings because the devices can be connected via FPGA. So far | |
1537 | * the list is smc91x on the omap2 SDP boards, and 8250 on zooms. | |
1538 | * REVISIT: Add timing support from slls644g.pdf and from the | |
1539 | * lan91c96 manual. | |
1540 | */ | |
1541 | if (of_device_is_compatible(child, "ns16550a") || | |
1542 | of_device_is_compatible(child, "smsc,lan91c94") || | |
1543 | of_device_is_compatible(child, "smsc,lan91c111")) { | |
1544 | dev_warn(&pdev->dev, | |
1545 | "%s using bootloader timings on CS%d\n", | |
1546 | child->name, cs); | |
1547 | goto no_timings; | |
1548 | } | |
1549 | ||
cdd6928c JH |
1550 | /* |
1551 | * FIXME: gpmc_cs_request() will map the CS to an arbitary | |
1552 | * location in the gpmc address space. When booting with | |
1553 | * device-tree we want the NOR flash to be mapped to the | |
1554 | * location specified in the device-tree blob. So remap the | |
1555 | * CS to this location. Once DT migration is complete should | |
1556 | * just make gpmc_cs_request() map a specific address. | |
1557 | */ | |
1558 | ret = gpmc_cs_remap(cs, res.start); | |
1559 | if (ret < 0) { | |
f70bf2a3 FE |
1560 | dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n", |
1561 | cs, &res.start); | |
cdd6928c JH |
1562 | goto err; |
1563 | } | |
1564 | ||
1565 | gpmc_read_settings_dt(child, &gpmc_s); | |
1566 | ||
1567 | ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width); | |
1568 | if (ret < 0) | |
1569 | goto err; | |
1570 | ||
1571 | ret = gpmc_cs_program_settings(cs, &gpmc_s); | |
1572 | if (ret < 0) | |
1573 | goto err; | |
1574 | ||
1575 | gpmc_read_timings_dt(child, &gpmc_t); | |
1576 | gpmc_cs_set_timings(cs, &gpmc_t); | |
1577 | ||
fd4446f2 | 1578 | no_timings: |
cdd6928c JH |
1579 | if (of_platform_device_create(child, NULL, &pdev->dev)) |
1580 | return 0; | |
1581 | ||
1582 | dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name); | |
e8ffd6fd | 1583 | ret = -ENODEV; |
cdd6928c JH |
1584 | |
1585 | err: | |
1586 | gpmc_cs_free(cs); | |
1587 | ||
1588 | return ret; | |
1589 | } | |
1590 | ||
bc6b1e7b DM |
1591 | static int gpmc_probe_dt(struct platform_device *pdev) |
1592 | { | |
1593 | int ret; | |
1594 | struct device_node *child; | |
1595 | const struct of_device_id *of_id = | |
1596 | of_match_device(gpmc_dt_ids, &pdev->dev); | |
1597 | ||
1598 | if (!of_id) | |
1599 | return 0; | |
1600 | ||
f34f3716 GP |
1601 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs", |
1602 | &gpmc_cs_num); | |
1603 | if (ret < 0) { | |
1604 | pr_err("%s: number of chip-selects not defined\n", __func__); | |
1605 | return ret; | |
1606 | } else if (gpmc_cs_num < 1) { | |
1607 | pr_err("%s: all chip-selects are disabled\n", __func__); | |
1608 | return -EINVAL; | |
1609 | } else if (gpmc_cs_num > GPMC_CS_NUM) { | |
1610 | pr_err("%s: number of supported chip-selects cannot be > %d\n", | |
1611 | __func__, GPMC_CS_NUM); | |
1612 | return -EINVAL; | |
1613 | } | |
1614 | ||
9f833156 JH |
1615 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins", |
1616 | &gpmc_nr_waitpins); | |
1617 | if (ret < 0) { | |
1618 | pr_err("%s: number of wait pins not found!\n", __func__); | |
1619 | return ret; | |
1620 | } | |
1621 | ||
68e2eb53 | 1622 | for_each_available_child_of_node(pdev->dev.of_node, child) { |
bc6b1e7b | 1623 | |
f2b09f67 JMC |
1624 | if (!child->name) |
1625 | continue; | |
cdd6928c | 1626 | |
f2b09f67 JMC |
1627 | if (of_node_cmp(child->name, "nand") == 0) |
1628 | ret = gpmc_probe_nand_child(pdev, child); | |
1629 | else if (of_node_cmp(child->name, "onenand") == 0) | |
1630 | ret = gpmc_probe_onenand_child(pdev, child); | |
1631 | else if (of_node_cmp(child->name, "ethernet") == 0 || | |
fd4446f2 TL |
1632 | of_node_cmp(child->name, "nor") == 0 || |
1633 | of_node_cmp(child->name, "uart") == 0) | |
f2b09f67 | 1634 | ret = gpmc_probe_generic_child(pdev, child); |
cdd6928c | 1635 | |
b327b362 JMC |
1636 | if (WARN(ret < 0, "%s: probing gpmc child %s failed\n", |
1637 | __func__, child->full_name)) | |
5330dc16 | 1638 | of_node_put(child); |
5330dc16 JMC |
1639 | } |
1640 | ||
bc6b1e7b DM |
1641 | return 0; |
1642 | } | |
1643 | #else | |
1644 | static int gpmc_probe_dt(struct platform_device *pdev) | |
1645 | { | |
1646 | return 0; | |
1647 | } | |
1648 | #endif | |
1649 | ||
351a102d | 1650 | static int gpmc_probe(struct platform_device *pdev) |
4bbbc1ad | 1651 | { |
8119024e | 1652 | int rc; |
6b6c32fc | 1653 | u32 l; |
da496873 | 1654 | struct resource *res; |
4bbbc1ad | 1655 | |
da496873 AM |
1656 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1657 | if (res == NULL) | |
1658 | return -ENOENT; | |
8d08436d | 1659 | |
da496873 AM |
1660 | phys_base = res->start; |
1661 | mem_size = resource_size(res); | |
fd1dc87d | 1662 | |
5857bd98 TR |
1663 | gpmc_base = devm_ioremap_resource(&pdev->dev, res); |
1664 | if (IS_ERR(gpmc_base)) | |
1665 | return PTR_ERR(gpmc_base); | |
da496873 AM |
1666 | |
1667 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1668 | if (res == NULL) | |
1669 | dev_warn(&pdev->dev, "Failed to get resource: irq\n"); | |
1670 | else | |
1671 | gpmc_irq = res->start; | |
1672 | ||
1673 | gpmc_l3_clk = clk_get(&pdev->dev, "fck"); | |
1674 | if (IS_ERR(gpmc_l3_clk)) { | |
1675 | dev_err(&pdev->dev, "error: clk_get\n"); | |
1676 | gpmc_irq = 0; | |
1677 | return PTR_ERR(gpmc_l3_clk); | |
fd1dc87d PW |
1678 | } |
1679 | ||
b3f5525c | 1680 | pm_runtime_enable(&pdev->dev); |
1681 | pm_runtime_get_sync(&pdev->dev); | |
1daa8c1d | 1682 | |
da496873 AM |
1683 | gpmc_dev = &pdev->dev; |
1684 | ||
4bbbc1ad | 1685 | l = gpmc_read_reg(GPMC_REVISION); |
aa8d4767 JH |
1686 | |
1687 | /* | |
1688 | * FIXME: Once device-tree migration is complete the below flags | |
1689 | * should be populated based upon the device-tree compatible | |
1690 | * string. For now just use the IP revision. OMAP3+ devices have | |
1691 | * the wr_access and wr_data_mux_bus register fields. OMAP4+ | |
1692 | * devices support the addr-addr-data multiplex protocol. | |
1693 | * | |
1694 | * GPMC IP revisions: | |
1695 | * - OMAP24xx = 2.0 | |
1696 | * - OMAP3xxx = 5.0 | |
1697 | * - OMAP44xx/54xx/AM335x = 6.0 | |
1698 | */ | |
da496873 AM |
1699 | if (GPMC_REVISION_MAJOR(l) > 0x4) |
1700 | gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS; | |
aa8d4767 JH |
1701 | if (GPMC_REVISION_MAJOR(l) > 0x5) |
1702 | gpmc_capability |= GPMC_HAS_MUX_AAD; | |
da496873 AM |
1703 | dev_info(gpmc_dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l), |
1704 | GPMC_REVISION_MINOR(l)); | |
1705 | ||
84b00f0e | 1706 | gpmc_mem_init(); |
db97eb7d | 1707 | |
71856843 | 1708 | if (gpmc_setup_irq() < 0) |
da496873 AM |
1709 | dev_warn(gpmc_dev, "gpmc_setup_irq failed\n"); |
1710 | ||
31d9adca JH |
1711 | /* Now the GPMC is initialised, unreserve the chip-selects */ |
1712 | gpmc_cs_map = 0; | |
1713 | ||
f34f3716 GP |
1714 | if (!pdev->dev.of_node) { |
1715 | gpmc_cs_num = GPMC_CS_NUM; | |
9f833156 | 1716 | gpmc_nr_waitpins = GPMC_NR_WAITPINS; |
f34f3716 | 1717 | } |
9f833156 | 1718 | |
bc6b1e7b DM |
1719 | rc = gpmc_probe_dt(pdev); |
1720 | if (rc < 0) { | |
b3f5525c | 1721 | pm_runtime_put_sync(&pdev->dev); |
bc6b1e7b DM |
1722 | clk_put(gpmc_l3_clk); |
1723 | dev_err(gpmc_dev, "failed to probe DT parameters\n"); | |
1724 | return rc; | |
1725 | } | |
1726 | ||
da496873 AM |
1727 | return 0; |
1728 | } | |
1729 | ||
351a102d | 1730 | static int gpmc_remove(struct platform_device *pdev) |
da496873 AM |
1731 | { |
1732 | gpmc_free_irq(); | |
1733 | gpmc_mem_exit(); | |
b3f5525c | 1734 | pm_runtime_put_sync(&pdev->dev); |
1735 | pm_runtime_disable(&pdev->dev); | |
da496873 AM |
1736 | gpmc_dev = NULL; |
1737 | return 0; | |
1738 | } | |
1739 | ||
b536dd41 | 1740 | #ifdef CONFIG_PM_SLEEP |
1741 | static int gpmc_suspend(struct device *dev) | |
1742 | { | |
1743 | omap3_gpmc_save_context(); | |
1744 | pm_runtime_put_sync(dev); | |
1745 | return 0; | |
1746 | } | |
1747 | ||
1748 | static int gpmc_resume(struct device *dev) | |
1749 | { | |
1750 | pm_runtime_get_sync(dev); | |
1751 | omap3_gpmc_restore_context(); | |
1752 | return 0; | |
1753 | } | |
1754 | #endif | |
1755 | ||
1756 | static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume); | |
1757 | ||
da496873 AM |
1758 | static struct platform_driver gpmc_driver = { |
1759 | .probe = gpmc_probe, | |
351a102d | 1760 | .remove = gpmc_remove, |
da496873 AM |
1761 | .driver = { |
1762 | .name = DEVICE_NAME, | |
1763 | .owner = THIS_MODULE, | |
bc6b1e7b | 1764 | .of_match_table = of_match_ptr(gpmc_dt_ids), |
b536dd41 | 1765 | .pm = &gpmc_pm_ops, |
da496873 AM |
1766 | }, |
1767 | }; | |
1768 | ||
1769 | static __init int gpmc_init(void) | |
1770 | { | |
1771 | return platform_driver_register(&gpmc_driver); | |
1772 | } | |
1773 | ||
1774 | static __exit void gpmc_exit(void) | |
1775 | { | |
1776 | platform_driver_unregister(&gpmc_driver); | |
1777 | ||
db97eb7d | 1778 | } |
da496873 | 1779 | |
b76c8b19 | 1780 | omap_postcore_initcall(gpmc_init); |
da496873 | 1781 | module_exit(gpmc_exit); |
db97eb7d | 1782 | |
4be48fd5 AM |
1783 | static int __init omap_gpmc_init(void) |
1784 | { | |
1785 | struct omap_hwmod *oh; | |
1786 | struct platform_device *pdev; | |
1787 | char *oh_name = "gpmc"; | |
1788 | ||
2f98ca89 DM |
1789 | /* |
1790 | * if the board boots up with a populated DT, do not | |
1791 | * manually add the device from this initcall | |
1792 | */ | |
1793 | if (of_have_populated_dt()) | |
1794 | return -ENODEV; | |
1795 | ||
4be48fd5 AM |
1796 | oh = omap_hwmod_lookup(oh_name); |
1797 | if (!oh) { | |
1798 | pr_err("Could not look up %s\n", oh_name); | |
1799 | return -ENODEV; | |
1800 | } | |
1801 | ||
c1d1cd59 | 1802 | pdev = omap_device_build(DEVICE_NAME, -1, oh, NULL, 0); |
4be48fd5 AM |
1803 | WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name); |
1804 | ||
1261674a | 1805 | return PTR_RET(pdev); |
4be48fd5 | 1806 | } |
b76c8b19 | 1807 | omap_postcore_initcall(omap_gpmc_init); |
4be48fd5 | 1808 | |
db97eb7d SG |
1809 | static irqreturn_t gpmc_handle_irq(int irq, void *dev) |
1810 | { | |
6b6c32fc AM |
1811 | int i; |
1812 | u32 regval; | |
1813 | ||
1814 | regval = gpmc_read_reg(GPMC_IRQSTATUS); | |
1815 | ||
1816 | if (!regval) | |
1817 | return IRQ_NONE; | |
1818 | ||
1819 | for (i = 0; i < GPMC_NR_IRQ; i++) | |
1820 | if (regval & gpmc_client_irq[i].bitmask) | |
1821 | generic_handle_irq(gpmc_client_irq[i].irq); | |
db97eb7d | 1822 | |
6b6c32fc | 1823 | gpmc_write_reg(GPMC_IRQSTATUS, regval); |
db97eb7d SG |
1824 | |
1825 | return IRQ_HANDLED; | |
4bbbc1ad | 1826 | } |
a2d3e7ba | 1827 | |
a2d3e7ba RN |
1828 | static struct omap3_gpmc_regs gpmc_context; |
1829 | ||
b2fa3b7c | 1830 | void omap3_gpmc_save_context(void) |
a2d3e7ba RN |
1831 | { |
1832 | int i; | |
b2fa3b7c | 1833 | |
a2d3e7ba RN |
1834 | gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG); |
1835 | gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE); | |
1836 | gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL); | |
1837 | gpmc_context.config = gpmc_read_reg(GPMC_CONFIG); | |
1838 | gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1); | |
1839 | gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2); | |
1840 | gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL); | |
f34f3716 | 1841 | for (i = 0; i < gpmc_cs_num; i++) { |
a2d3e7ba RN |
1842 | gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i); |
1843 | if (gpmc_context.cs_context[i].is_valid) { | |
1844 | gpmc_context.cs_context[i].config1 = | |
1845 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG1); | |
1846 | gpmc_context.cs_context[i].config2 = | |
1847 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG2); | |
1848 | gpmc_context.cs_context[i].config3 = | |
1849 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG3); | |
1850 | gpmc_context.cs_context[i].config4 = | |
1851 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG4); | |
1852 | gpmc_context.cs_context[i].config5 = | |
1853 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG5); | |
1854 | gpmc_context.cs_context[i].config6 = | |
1855 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG6); | |
1856 | gpmc_context.cs_context[i].config7 = | |
1857 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG7); | |
1858 | } | |
1859 | } | |
1860 | } | |
1861 | ||
b2fa3b7c | 1862 | void omap3_gpmc_restore_context(void) |
a2d3e7ba RN |
1863 | { |
1864 | int i; | |
b2fa3b7c | 1865 | |
a2d3e7ba RN |
1866 | gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig); |
1867 | gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable); | |
1868 | gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl); | |
1869 | gpmc_write_reg(GPMC_CONFIG, gpmc_context.config); | |
1870 | gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1); | |
1871 | gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2); | |
1872 | gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control); | |
f34f3716 | 1873 | for (i = 0; i < gpmc_cs_num; i++) { |
a2d3e7ba RN |
1874 | if (gpmc_context.cs_context[i].is_valid) { |
1875 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG1, | |
1876 | gpmc_context.cs_context[i].config1); | |
1877 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG2, | |
1878 | gpmc_context.cs_context[i].config2); | |
1879 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG3, | |
1880 | gpmc_context.cs_context[i].config3); | |
1881 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG4, | |
1882 | gpmc_context.cs_context[i].config4); | |
1883 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG5, | |
1884 | gpmc_context.cs_context[i].config5); | |
1885 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG6, | |
1886 | gpmc_context.cs_context[i].config6); | |
1887 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG7, | |
1888 | gpmc_context.cs_context[i].config7); | |
1889 | } | |
1890 | } | |
1891 | } |