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