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ARM: omap2: gpmc: Mark local scoped functions static
[linux-2.6-block.git] / arch / arm / mach-omap2 / gpmc.c
CommitLineData
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
DM		 28#include <linux/of.h>
29#include <linux/of_mtd.h>
30#include <linux/of_device.h>
31#include <linux/mtd/nand.h>
4bbbc1ad 32
bc3668ea 33#include <linux/platform_data/mtd-nand-omap2.h>
4bbbc1ad 34
7f245162 35#include <asm/mach-types.h>
72d0f1c3 36
dbc04161 37#include "soc.h"
7d7e1eba 38#include "common.h"
25c7d49e 39#include "omap_device.h"
3ef5d007 40#include "gpmc.h"
bc6b1e7b 41#include "gpmc-nand.h"
75d3625e 42#include "gpmc-onenand.h"
7d7e1eba 43
4be48fd5
AM		 44#define DEVICE_NAME "omap-gpmc"
45
fd1dc87d 46/* GPMC register offsets */
4bbbc1ad
JY		 47#define GPMC_REVISION 0x00
48#define GPMC_SYSCONFIG 0x10
49#define GPMC_SYSSTATUS 0x14
50#define GPMC_IRQSTATUS 0x18
51#define GPMC_IRQENABLE 0x1c
52#define GPMC_TIMEOUT_CONTROL 0x40
53#define GPMC_ERR_ADDRESS 0x44
54#define GPMC_ERR_TYPE 0x48
55#define GPMC_CONFIG 0x50
56#define GPMC_STATUS 0x54
57#define GPMC_PREFETCH_CONFIG1 0x1e0
58#define GPMC_PREFETCH_CONFIG2 0x1e4
15e02a3b 59#define GPMC_PREFETCH_CONTROL 0x1ec
4bbbc1ad
JY		 60#define GPMC_PREFETCH_STATUS 0x1f0
61#define GPMC_ECC_CONFIG 0x1f4
62#define GPMC_ECC_CONTROL 0x1f8
63#define GPMC_ECC_SIZE_CONFIG 0x1fc
948d38e7 64#define GPMC_ECC1_RESULT 0x200
8d602cf5 65#define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */
2fdf0c98
AM		 66#define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */
67#define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */
68#define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */
4bbbc1ad 69
2c65e744
YY		 70/* GPMC ECC control settings */
71#define GPMC_ECC_CTRL_ECCCLEAR 0x100
72#define GPMC_ECC_CTRL_ECCDISABLE 0x000
73#define GPMC_ECC_CTRL_ECCREG1 0x001
74#define GPMC_ECC_CTRL_ECCREG2 0x002
75#define GPMC_ECC_CTRL_ECCREG3 0x003
76#define GPMC_ECC_CTRL_ECCREG4 0x004
77#define GPMC_ECC_CTRL_ECCREG5 0x005
78#define GPMC_ECC_CTRL_ECCREG6 0x006
79#define GPMC_ECC_CTRL_ECCREG7 0x007
80#define GPMC_ECC_CTRL_ECCREG8 0x008
81#define GPMC_ECC_CTRL_ECCREG9 0x009
82
559d94b0
AM		 83#define GPMC_CONFIG2_CSEXTRADELAY BIT(7)
84#define GPMC_CONFIG3_ADVEXTRADELAY BIT(7)
85#define GPMC_CONFIG4_OEEXTRADELAY BIT(7)
86#define GPMC_CONFIG4_WEEXTRADELAY BIT(23)
87#define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6)
88#define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7)
89
948d38e7 90#define GPMC_CS0_OFFSET 0x60
4bbbc1ad 91#define GPMC_CS_SIZE 0x30
2fdf0c98 92#define GPMC_BCH_SIZE 0x10
4bbbc1ad 93
f37e4580
ID		 94#define GPMC_MEM_START 0x00000000
95#define GPMC_MEM_END 0x3FFFFFFF
96#define BOOT_ROM_SPACE 0x100000 /* 1MB */
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
110
6b6c32fc
AM		 111/* XXX: Only NAND irq has been considered,currently these are the only ones used
112 */
113#define GPMC_NR_IRQ 2
114
115struct gpmc_client_irq {
116 unsigned irq;
117 u32 bitmask;
118};
119
a2d3e7ba
RN		 120/* Structure to save gpmc cs context */
121struct gpmc_cs_config {
122 u32 config1;
123 u32 config2;
124 u32 config3;
125 u32 config4;
126 u32 config5;
127 u32 config6;
128 u32 config7;
129 int is_valid;
130};
131
132/*
133 * Structure to save/restore gpmc context
134 * to support core off on OMAP3
135 */
136struct omap3_gpmc_regs {
137 u32 sysconfig;
138 u32 irqenable;
139 u32 timeout_ctrl;
140 u32 config;
141 u32 prefetch_config1;
142 u32 prefetch_config2;
143 u32 prefetch_control;
144 struct gpmc_cs_config cs_context[GPMC_CS_NUM];
145};
146
6b6c32fc
AM		 147static struct gpmc_client_irq gpmc_client_irq[GPMC_NR_IRQ];
148static struct irq_chip gpmc_irq_chip;
149static unsigned gpmc_irq_start;
150
f37e4580
ID		 151static struct resource gpmc_mem_root;
152static struct resource gpmc_cs_mem[GPMC_CS_NUM];
87b247c4 153static DEFINE_SPINLOCK(gpmc_mem_lock);
6797b4fe
JH		 154/* Define chip-selects as reserved by default until probe completes */
155static unsigned int gpmc_cs_map = ((1 << GPMC_CS_NUM) - 1);
da496873
AM		 156static struct device *gpmc_dev;
157static int gpmc_irq;
158static resource_size_t phys_base, mem_size;
159static unsigned gpmc_capability;
fd1dc87d 160static void __iomem *gpmc_base;
4bbbc1ad 161
fd1dc87d 162static struct clk *gpmc_l3_clk;
4bbbc1ad 163
db97eb7d
SG		 164static irqreturn_t gpmc_handle_irq(int irq, void *dev);
165
4bbbc1ad
JY		 166static void gpmc_write_reg(int idx, u32 val)
167{
168 __raw_writel(val, gpmc_base + idx);
169}
170
171static u32 gpmc_read_reg(int idx)
172{
173 return __raw_readl(gpmc_base + idx);
174}
175
176void gpmc_cs_write_reg(int cs, int idx, u32 val)
177{
178 void __iomem *reg_addr;
179
948d38e7 180 reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx;
4bbbc1ad
JY		 181 __raw_writel(val, reg_addr);
182}
183
3fc089e7 184static u32 gpmc_cs_read_reg(int cs, int idx)
4bbbc1ad 185{
fd1dc87d
PW		 186 void __iomem *reg_addr;
187
948d38e7 188 reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx;
fd1dc87d 189 return __raw_readl(reg_addr);
4bbbc1ad
JY		 190}
191
fd1dc87d 192/* TODO: Add support for gpmc_fck to clock framework and use it */
3fc089e7 193static unsigned long gpmc_get_fclk_period(void)
4bbbc1ad 194{
fd1dc87d
PW		 195 unsigned long rate = clk_get_rate(gpmc_l3_clk);
196
197 if (rate == 0) {
198 printk(KERN_WARNING "gpmc_l3_clk not enabled\n");
199 return 0;
200 }
201
202 rate /= 1000;
203 rate = 1000000000 / rate; /* In picoseconds */
204
205 return rate;
4bbbc1ad
JY		 206}
207
3fc089e7 208static unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
4bbbc1ad
JY		 209{
210 unsigned long tick_ps;
211
212 /* Calculate in picosecs to yield more exact results */
213 tick_ps = gpmc_get_fclk_period();
214
215 return (time_ns * 1000 + tick_ps - 1) / tick_ps;
216}
217
3fc089e7 218static unsigned int gpmc_ps_to_ticks(unsigned int time_ps)
a3551f5b
AH		 219{
220 unsigned long tick_ps;
221
222 /* Calculate in picosecs to yield more exact results */
223 tick_ps = gpmc_get_fclk_period();
224
225 return (time_ps + tick_ps - 1) / tick_ps;
226}
227
fd1dc87d
PW		 228unsigned int gpmc_ticks_to_ns(unsigned int ticks)
229{
230 return ticks * gpmc_get_fclk_period() / 1000;
231}
232
3fc089e7 233static unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns)
23300597
KS		 234{
235 unsigned long ticks = gpmc_ns_to_ticks(time_ns);
236
237 return ticks * gpmc_get_fclk_period() / 1000;
238}
239
246da26d
AM		 240static unsigned int gpmc_ticks_to_ps(unsigned int ticks)
241{
242 return ticks * gpmc_get_fclk_period();
243}
244
245static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps)
246{
247 unsigned long ticks = gpmc_ps_to_ticks(time_ps);
248
249 return ticks * gpmc_get_fclk_period();
250}
251
559d94b0
AM		 252static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value)
253{
254 u32 l;
255
256 l = gpmc_cs_read_reg(cs, reg);
257 if (value)
258 l |= mask;
259 else
260 l &= ~mask;
261 gpmc_cs_write_reg(cs, reg, l);
262}
263
264static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p)
265{
266 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1,
267 GPMC_CONFIG1_TIME_PARA_GRAN,
268 p->time_para_granularity);
269 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2,
270 GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay);
271 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3,
272 GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay);
273 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
274 GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay);
275 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
276 GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay);
277 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
278 GPMC_CONFIG6_CYCLE2CYCLESAMECSEN,
279 p->cycle2cyclesamecsen);
280 gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
281 GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN,
282 p->cycle2cyclediffcsen);
283}
284
4bbbc1ad
JY		 285#ifdef DEBUG
286static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
2aab6468 287 int time, const char *name)
4bbbc1ad
JY		 288#else
289static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
290 int time)
291#endif
292{
293 u32 l;
294 int ticks, mask, nr_bits;
295
296 if (time == 0)
297 ticks = 0;
298 else
299 ticks = gpmc_ns_to_ticks(time);
300 nr_bits = end_bit - st_bit + 1;
1c22cc13
DB		 301 if (ticks >= 1 << nr_bits) {
302#ifdef DEBUG
303 printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n",
304 cs, name, time, ticks, 1 << nr_bits);
305#endif
4bbbc1ad 306 return -1;
1c22cc13 307 }
4bbbc1ad
JY		 308
309 mask = (1 << nr_bits) - 1;
310 l = gpmc_cs_read_reg(cs, reg);
311#ifdef DEBUG
1c22cc13
DB		 312 printk(KERN_INFO
313 "GPMC CS%d: %-10s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n",
2aab6468 314 cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000,
1c22cc13 315 (l >> st_bit) & mask, time);
4bbbc1ad
JY		 316#endif
317 l &= ~(mask << st_bit);
318 l |= ticks << st_bit;
319 gpmc_cs_write_reg(cs, reg, l);
320
321 return 0;
322}
323
324#ifdef DEBUG
325#define GPMC_SET_ONE(reg, st, end, field) \
326 if (set_gpmc_timing_reg(cs, (reg), (st), (end), \
327 t->field, #field) < 0) \
328 return -1
329#else
330#define GPMC_SET_ONE(reg, st, end, field) \
331 if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \
332 return -1
333#endif
334
1b47ca1a 335int gpmc_calc_divider(unsigned int sync_clk)
4bbbc1ad
JY		 336{
337 int div;
338 u32 l;
339
a3551f5b 340 l = sync_clk + (gpmc_get_fclk_period() - 1);
4bbbc1ad
JY		 341 div = l / gpmc_get_fclk_period();
342 if (div > 4)
343 return -1;
1c22cc13 344 if (div <= 0)
4bbbc1ad
JY		 345 div = 1;
346
347 return div;
348}
349
350int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
351{
352 int div;
353 u32 l;
354
1b47ca1a 355 div = gpmc_calc_divider(t->sync_clk);
4bbbc1ad 356 if (div < 0)
a032d33b 357 return div;
4bbbc1ad
JY		 358
359 GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on);
360 GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off);
361 GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off);
362
363 GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on);
364 GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off);
365 GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off);
366
367 GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on);
368 GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off);
369 GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on);
370 GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off);
371
372 GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle);
373 GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle);
374 GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access);
375
376 GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);
377
559d94b0
AM		 378 GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround);
379 GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay);
380
381 GPMC_SET_ONE(GPMC_CS_CONFIG1, 18, 19, wait_monitoring);
382 GPMC_SET_ONE(GPMC_CS_CONFIG1, 25, 26, clk_activation);
383
da496873 384 if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
cc26b3b0 385 GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
da496873 386 if (gpmc_capability & GPMC_HAS_WR_ACCESS)
cc26b3b0 387 GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);
cc26b3b0 388
1c22cc13
DB		 389 /* caller is expected to have initialized CONFIG1 to cover
390 * at least sync vs async
391 */
392 l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
393 if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) {
4bbbc1ad 394#ifdef DEBUG
1c22cc13
DB		 395 printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n",
396 cs, (div * gpmc_get_fclk_period()) / 1000, div);
4bbbc1ad 397#endif
1c22cc13
DB		 398 l &= ~0x03;
399 l |= (div - 1);
400 gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
401 }
4bbbc1ad 402
559d94b0
AM		 403 gpmc_cs_bool_timings(cs, &t->bool_timings);
404
4bbbc1ad
JY		 405 return 0;
406}
407
f37e4580
ID		 408static void gpmc_cs_enable_mem(int cs, u32 base, u32 size)
409{
410 u32 l;
411 u32 mask;
412
413 mask = (1 << GPMC_SECTION_SHIFT) - size;
414 l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
415 l &= ~0x3f;
416 l = (base >> GPMC_CHUNK_SHIFT) & 0x3f;
417 l &= ~(0x0f << 8);
418 l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8;
a2d3e7ba 419 l |= GPMC_CONFIG7_CSVALID;
f37e4580
ID		 420 gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
421}
422
423static void gpmc_cs_disable_mem(int cs)
424{
425 u32 l;
426
427 l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
a2d3e7ba 428 l &= ~GPMC_CONFIG7_CSVALID;
f37e4580
ID		 429 gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
430}
431
432static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size)
433{
434 u32 l;
435 u32 mask;
436
437 l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
438 *base = (l & 0x3f) << GPMC_CHUNK_SHIFT;
439 mask = (l >> 8) & 0x0f;
440 *size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT);
441}
442
443static int gpmc_cs_mem_enabled(int cs)
444{
445 u32 l;
446
447 l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
a2d3e7ba 448 return l & GPMC_CONFIG7_CSVALID;
f37e4580
ID		 449}
450
3fc089e7 451static int gpmc_cs_set_reserved(int cs, int reserved)
4bbbc1ad 452{
c40fae95
TL		 453 if (cs > GPMC_CS_NUM)
454 return -ENODEV;
455
f37e4580
ID		 456 gpmc_cs_map &= ~(1 << cs);
457 gpmc_cs_map |= (reserved ? 1 : 0) << cs;
c40fae95
TL		 458
459 return 0;
f37e4580
ID		 460}
461
3fc089e7 462static int gpmc_cs_reserved(int cs)
f37e4580 463{
c40fae95
TL		 464 if (cs > GPMC_CS_NUM)
465 return -ENODEV;
466
f37e4580
ID		 467 return gpmc_cs_map & (1 << cs);
468}
469
470static unsigned long gpmc_mem_align(unsigned long size)
471{
472 int order;
473
474 size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1);
475 order = GPMC_CHUNK_SHIFT - 1;
476 do {
477 size >>= 1;
478 order++;
479 } while (size);
480 size = 1 << order;
481 return size;
482}
483
484static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size)
485{
486 struct resource *res = &gpmc_cs_mem[cs];
487 int r;
488
489 size = gpmc_mem_align(size);
490 spin_lock(&gpmc_mem_lock);
491 res->start = base;
492 res->end = base + size - 1;
493 r = request_resource(&gpmc_mem_root, res);
494 spin_unlock(&gpmc_mem_lock);
495
496 return r;
497}
498
da496873
AM		 499static int gpmc_cs_delete_mem(int cs)
500{
501 struct resource *res = &gpmc_cs_mem[cs];
502 int r;
503
504 spin_lock(&gpmc_mem_lock);
505 r = release_resource(&gpmc_cs_mem[cs]);
506 res->start = 0;
507 res->end = 0;
508 spin_unlock(&gpmc_mem_lock);
509
510 return r;
511}
512
f37e4580
ID		 513int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
514{
515 struct resource *res = &gpmc_cs_mem[cs];
516 int r = -1;
517
518 if (cs > GPMC_CS_NUM)
519 return -ENODEV;
520
521 size = gpmc_mem_align(size);
522 if (size > (1 << GPMC_SECTION_SHIFT))
523 return -ENOMEM;
524
525 spin_lock(&gpmc_mem_lock);
526 if (gpmc_cs_reserved(cs)) {
527 r = -EBUSY;
528 goto out;
529 }
530 if (gpmc_cs_mem_enabled(cs))
531 r = adjust_resource(res, res->start & ~(size - 1), size);
532 if (r < 0)
533 r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0,
534 size, NULL, NULL);
535 if (r < 0)
536 goto out;
537
6d135242 538 gpmc_cs_enable_mem(cs, res->start, resource_size(res));
f37e4580
ID		 539 *base = res->start;
540 gpmc_cs_set_reserved(cs, 1);
541out:
542 spin_unlock(&gpmc_mem_lock);
543 return r;
544}
fd1dc87d 545EXPORT_SYMBOL(gpmc_cs_request);
f37e4580
ID		 546
547void gpmc_cs_free(int cs)
548{
549 spin_lock(&gpmc_mem_lock);
e7fdc605 550 if (cs >= GPMC_CS_NUM || cs < 0 || !gpmc_cs_reserved(cs)) {
f37e4580
ID		 551 printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs);
552 BUG();
553 spin_unlock(&gpmc_mem_lock);
554 return;
555 }
556 gpmc_cs_disable_mem(cs);
557 release_resource(&gpmc_cs_mem[cs]);
558 gpmc_cs_set_reserved(cs, 0);
559 spin_unlock(&gpmc_mem_lock);
560}
fd1dc87d 561EXPORT_SYMBOL(gpmc_cs_free);
f37e4580 562
948d38e7
SG		 563/**
564 * gpmc_cs_configure - write request to configure gpmc
565 * @cs: chip select number
566 * @cmd: command type
567 * @wval: value to write
568 * @return status of the operation
569 */
570int gpmc_cs_configure(int cs, int cmd, int wval)
571{
572 int err = 0;
573 u32 regval = 0;
574
575 switch (cmd) {
db97eb7d
SG		 576 case GPMC_ENABLE_IRQ:
577 gpmc_write_reg(GPMC_IRQENABLE, wval);
578 break;
579
948d38e7
SG		 580 case GPMC_SET_IRQ_STATUS:
581 gpmc_write_reg(GPMC_IRQSTATUS, wval);
582 break;
583
584 case GPMC_CONFIG_WP:
585 regval = gpmc_read_reg(GPMC_CONFIG);
586 if (wval)
587 regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */
588 else
589 regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */
590 gpmc_write_reg(GPMC_CONFIG, regval);
591 break;
592
593 case GPMC_CONFIG_RDY_BSY:
594 regval = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
595 if (wval)
596 regval |= WR_RD_PIN_MONITORING;
597 else
598 regval &= ~WR_RD_PIN_MONITORING;
599 gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
600 break;
601
602 case GPMC_CONFIG_DEV_SIZE:
603 regval = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
8ef5d844
YY		 604
605 /* clear 2 target bits */
606 regval &= ~GPMC_CONFIG1_DEVICESIZE(3);
607
608 /* set the proper value */
948d38e7 609 regval |= GPMC_CONFIG1_DEVICESIZE(wval);
8ef5d844 610
948d38e7
SG		 611 gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
612 break;
613
614 case GPMC_CONFIG_DEV_TYPE:
615 regval = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
c9fb8094
MJ		 616 /* clear 4 target bits */
617 regval &= ~(GPMC_CONFIG1_DEVICETYPE(3) |
618 GPMC_CONFIG1_MUXTYPE(3));
619 /* set the proper value */
948d38e7
SG		 620 regval |= GPMC_CONFIG1_DEVICETYPE(wval);
621 if (wval == GPMC_DEVICETYPE_NOR)
622 regval |= GPMC_CONFIG1_MUXADDDATA;
623 gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
624 break;
625
626 default:
627 printk(KERN_ERR "gpmc_configure_cs: Not supported\n");
628 err = -EINVAL;
629 }
630
631 return err;
632}
633EXPORT_SYMBOL(gpmc_cs_configure);
634
52bd138d
AM		 635void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
636{
2fdf0c98
AM		 637 int i;
638
52bd138d
AM		 639 reg->gpmc_status = gpmc_base + GPMC_STATUS;
640 reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET +
641 GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
642 reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET +
643 GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
644 reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET +
645 GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
646 reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
647 reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2;
648 reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL;
649 reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS;
650 reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG;
651 reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL;
652 reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG;
653 reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT;
2fdf0c98
AM		 654
655 for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) {
656 reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 +
657 GPMC_BCH_SIZE * i;
658 reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 +
659 GPMC_BCH_SIZE * i;
660 reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 +
661 GPMC_BCH_SIZE * i;
662 reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 +
663 GPMC_BCH_SIZE * i;
664 }
52bd138d
AM		 665}
666
6b6c32fc
AM		 667int gpmc_get_client_irq(unsigned irq_config)
668{
669 int i;
670
671 if (hweight32(irq_config) > 1)
672 return 0;
673
674 for (i = 0; i < GPMC_NR_IRQ; i++)
675 if (gpmc_client_irq[i].bitmask & irq_config)
676 return gpmc_client_irq[i].irq;
677
678 return 0;
679}
680
681static int gpmc_irq_endis(unsigned irq, bool endis)
682{
683 int i;
684 u32 regval;
685
686 for (i = 0; i < GPMC_NR_IRQ; i++)
687 if (irq == gpmc_client_irq[i].irq) {
688 regval = gpmc_read_reg(GPMC_IRQENABLE);
689 if (endis)
690 regval |= gpmc_client_irq[i].bitmask;
691 else
692 regval &= ~gpmc_client_irq[i].bitmask;
693 gpmc_write_reg(GPMC_IRQENABLE, regval);
694 break;
695 }
696
697 return 0;
698}
699
700static void gpmc_irq_disable(struct irq_data *p)
701{
702 gpmc_irq_endis(p->irq, false);
703}
704
705static void gpmc_irq_enable(struct irq_data *p)
706{
707 gpmc_irq_endis(p->irq, true);
708}
709
710static void gpmc_irq_noop(struct irq_data *data) { }
711
712static unsigned int gpmc_irq_noop_ret(struct irq_data *data) { return 0; }
713
da496873 714static int gpmc_setup_irq(void)
6b6c32fc
AM		 715{
716 int i;
717 u32 regval;
718
719 if (!gpmc_irq)
720 return -EINVAL;
721
722 gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0);
71856843 723 if (gpmc_irq_start < 0) {
6b6c32fc
AM		 724 pr_err("irq_alloc_descs failed\n");
725 return gpmc_irq_start;
726 }
727
728 gpmc_irq_chip.name = "gpmc";
729 gpmc_irq_chip.irq_startup = gpmc_irq_noop_ret;
730 gpmc_irq_chip.irq_enable = gpmc_irq_enable;
731 gpmc_irq_chip.irq_disable = gpmc_irq_disable;
732 gpmc_irq_chip.irq_shutdown = gpmc_irq_noop;
733 gpmc_irq_chip.irq_ack = gpmc_irq_noop;
734 gpmc_irq_chip.irq_mask = gpmc_irq_noop;
735 gpmc_irq_chip.irq_unmask = gpmc_irq_noop;
736
737 gpmc_client_irq[0].bitmask = GPMC_IRQ_FIFOEVENTENABLE;
738 gpmc_client_irq[1].bitmask = GPMC_IRQ_COUNT_EVENT;
739
740 for (i = 0; i < GPMC_NR_IRQ; i++) {
741 gpmc_client_irq[i].irq = gpmc_irq_start + i;
742 irq_set_chip_and_handler(gpmc_client_irq[i].irq,
743 &gpmc_irq_chip, handle_simple_irq);
744 set_irq_flags(gpmc_client_irq[i].irq,
745 IRQF_VALID | IRQF_NOAUTOEN);
746 }
747
748 /* Disable interrupts */
749 gpmc_write_reg(GPMC_IRQENABLE, 0);
750
751 /* clear interrupts */
752 regval = gpmc_read_reg(GPMC_IRQSTATUS);
753 gpmc_write_reg(GPMC_IRQSTATUS, regval);
754
755 return request_irq(gpmc_irq, gpmc_handle_irq, 0, "gpmc", NULL);
756}
757
351a102d 758static int gpmc_free_irq(void)
da496873
AM		 759{
760 int i;
761
762 if (gpmc_irq)
763 free_irq(gpmc_irq, NULL);
764
765 for (i = 0; i < GPMC_NR_IRQ; i++) {
766 irq_set_handler(gpmc_client_irq[i].irq, NULL);
767 irq_set_chip(gpmc_client_irq[i].irq, &no_irq_chip);
768 irq_modify_status(gpmc_client_irq[i].irq, 0, 0);
769 }
770
771 irq_free_descs(gpmc_irq_start, GPMC_NR_IRQ);
772
773 return 0;
774}
775
351a102d 776static void gpmc_mem_exit(void)
da496873
AM		 777{
778 int cs;
779
780 for (cs = 0; cs < GPMC_CS_NUM; cs++) {
781 if (!gpmc_cs_mem_enabled(cs))
782 continue;
783 gpmc_cs_delete_mem(cs);
784 }
785
786}
787
351a102d 788static int gpmc_mem_init(void)
f37e4580 789{
8119024e 790 int cs, rc;
f37e4580
ID		 791 unsigned long boot_rom_space = 0;
792
7f245162
KP		 793 /* never allocate the first page, to facilitate bug detection;
794 * even if we didn't boot from ROM.
795 */
796 boot_rom_space = BOOT_ROM_SPACE;
f37e4580
ID		 797 gpmc_mem_root.start = GPMC_MEM_START + boot_rom_space;
798 gpmc_mem_root.end = GPMC_MEM_END;
799
800 /* Reserve all regions that has been set up by bootloader */
801 for (cs = 0; cs < GPMC_CS_NUM; cs++) {
802 u32 base, size;
803
804 if (!gpmc_cs_mem_enabled(cs))
805 continue;
806 gpmc_cs_get_memconf(cs, &base, &size);
8119024e 807 rc = gpmc_cs_insert_mem(cs, base, size);
71856843 808 if (rc < 0) {
8119024e
JH		 809 while (--cs >= 0)
810 if (gpmc_cs_mem_enabled(cs))
811 gpmc_cs_delete_mem(cs);
812 return rc;
813 }
f37e4580 814 }
8119024e
JH		 815
816 return 0;
4bbbc1ad
JY		 817}
818
246da26d
AM		 819static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk)
820{
821 u32 temp;
822 int div;
823
824 div = gpmc_calc_divider(sync_clk);
825 temp = gpmc_ps_to_ticks(time_ps);
826 temp = (temp + div - 1) / div;
827 return gpmc_ticks_to_ps(temp * div);
828}
829
830/* XXX: can the cycles be avoided ? */
831static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t,
832 struct gpmc_device_timings *dev_t)
833{
834 bool mux = dev_t->mux;
835 u32 temp;
836
837 /* adv_rd_off */
838 temp = dev_t->t_avdp_r;
839 /* XXX: mux check required ? */
840 if (mux) {
841 /* XXX: t_avdp not to be required for sync, only added for tusb
842 * this indirectly necessitates requirement of t_avdp_r and
843 * t_avdp_w instead of having a single t_avdp
844 */
845 temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh);
846 temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
847 }
848 gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp);
849
850 /* oe_on */
851 temp = dev_t->t_oeasu; /* XXX: remove this ? */
852 if (mux) {
853 temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach);
854 temp = max_t(u32, temp, gpmc_t->adv_rd_off +
855 gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe));
856 }
857 gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp);
858
859 /* access */
860 /* XXX: any scope for improvement ?, by combining oe_on
861 * and clk_activation, need to check whether
862 * access = clk_activation + round to sync clk ?
863 */
864 temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk);
865 temp += gpmc_t->clk_activation;
866 if (dev_t->cyc_oe)
867 temp = max_t(u32, temp, gpmc_t->oe_on +
868 gpmc_ticks_to_ps(dev_t->cyc_oe));
869 gpmc_t->access = gpmc_round_ps_to_ticks(temp);
870
871 gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1);
872 gpmc_t->cs_rd_off = gpmc_t->oe_off;
873
874 /* rd_cycle */
875 temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez);
876 temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) +
877 gpmc_t->access;
878 /* XXX: barter t_ce_rdyz with t_cez_r ? */
879 if (dev_t->t_ce_rdyz)
880 temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz);
881 gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp);
882
883 return 0;
884}
885
886static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t,
887 struct gpmc_device_timings *dev_t)
888{
889 bool mux = dev_t->mux;
890 u32 temp;
891
892 /* adv_wr_off */
893 temp = dev_t->t_avdp_w;
894 if (mux) {
895 temp = max_t(u32, temp,
896 gpmc_t->clk_activation + dev_t->t_avdh);
897 temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
898 }
899 gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp);
900
901 /* wr_data_mux_bus */
902 temp = max_t(u32, dev_t->t_weasu,
903 gpmc_t->clk_activation + dev_t->t_rdyo);
904 /* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?,
905 * and in that case remember to handle we_on properly
906 */
907 if (mux) {
908 temp = max_t(u32, temp,
909 gpmc_t->adv_wr_off + dev_t->t_aavdh);
910 temp = max_t(u32, temp, gpmc_t->adv_wr_off +
911 gpmc_ticks_to_ps(dev_t->cyc_aavdh_we));
912 }
913 gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp);
914
915 /* we_on */
916 if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
917 gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu);
918 else
919 gpmc_t->we_on = gpmc_t->wr_data_mux_bus;
920
921 /* wr_access */
922 /* XXX: gpmc_capability check reqd ? , even if not, will not harm */
923 gpmc_t->wr_access = gpmc_t->access;
924
925 /* we_off */
926 temp = gpmc_t->we_on + dev_t->t_wpl;
927 temp = max_t(u32, temp,
928 gpmc_t->wr_access + gpmc_ticks_to_ps(1));
929 temp = max_t(u32, temp,
930 gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl));
931 gpmc_t->we_off = gpmc_round_ps_to_ticks(temp);
932
933 gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off +
934 dev_t->t_wph);
935
936 /* wr_cycle */
937 temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk);
938 temp += gpmc_t->wr_access;
939 /* XXX: barter t_ce_rdyz with t_cez_w ? */
940 if (dev_t->t_ce_rdyz)
941 temp = max_t(u32, temp,
942 gpmc_t->cs_wr_off + dev_t->t_ce_rdyz);
943 gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp);
944
945 return 0;
946}
947
948static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t,
949 struct gpmc_device_timings *dev_t)
950{
951 bool mux = dev_t->mux;
952 u32 temp;
953
954 /* adv_rd_off */
955 temp = dev_t->t_avdp_r;
956 if (mux)
957 temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
958 gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp);
959
960 /* oe_on */
961 temp = dev_t->t_oeasu;
962 if (mux)
963 temp = max_t(u32, temp,
964 gpmc_t->adv_rd_off + dev_t->t_aavdh);
965 gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp);
966
967 /* access */
968 temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */
969 gpmc_t->oe_on + dev_t->t_oe);
970 temp = max_t(u32, temp,
971 gpmc_t->cs_on + dev_t->t_ce);
972 temp = max_t(u32, temp,
973 gpmc_t->adv_on + dev_t->t_aa);
974 gpmc_t->access = gpmc_round_ps_to_ticks(temp);
975
976 gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1);
977 gpmc_t->cs_rd_off = gpmc_t->oe_off;
978
979 /* rd_cycle */
980 temp = max_t(u32, dev_t->t_rd_cycle,
981 gpmc_t->cs_rd_off + dev_t->t_cez_r);
982 temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez);
983 gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp);
984
985 return 0;
986}
987
988static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t,
989 struct gpmc_device_timings *dev_t)
990{
991 bool mux = dev_t->mux;
992 u32 temp;
993
994 /* adv_wr_off */
995 temp = dev_t->t_avdp_w;
996 if (mux)
997 temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
998 gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp);
999
1000 /* wr_data_mux_bus */
1001 temp = dev_t->t_weasu;
1002 if (mux) {
1003 temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh);
1004 temp = max_t(u32, temp, gpmc_t->adv_wr_off +
1005 gpmc_ticks_to_ps(dev_t->cyc_aavdh_we));
1006 }
1007 gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp);
1008
1009 /* we_on */
1010 if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
1011 gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu);
1012 else
1013 gpmc_t->we_on = gpmc_t->wr_data_mux_bus;
1014
1015 /* we_off */
1016 temp = gpmc_t->we_on + dev_t->t_wpl;
1017 gpmc_t->we_off = gpmc_round_ps_to_ticks(temp);
1018
1019 gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off +
1020 dev_t->t_wph);
1021
1022 /* wr_cycle */
1023 temp = max_t(u32, dev_t->t_wr_cycle,
1024 gpmc_t->cs_wr_off + dev_t->t_cez_w);
1025 gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp);
1026
1027 return 0;
1028}
1029
1030static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t,
1031 struct gpmc_device_timings *dev_t)
1032{
1033 u32 temp;
1034
1035 gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) *
1036 gpmc_get_fclk_period();
1037
1038 gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk(
1039 dev_t->t_bacc,
1040 gpmc_t->sync_clk);
1041
1042 temp = max_t(u32, dev_t->t_ces, dev_t->t_avds);
1043 gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp);
1044
1045 if (gpmc_calc_divider(gpmc_t->sync_clk) != 1)
1046 return 0;
1047
1048 if (dev_t->ce_xdelay)
1049 gpmc_t->bool_timings.cs_extra_delay = true;
1050 if (dev_t->avd_xdelay)
1051 gpmc_t->bool_timings.adv_extra_delay = true;
1052 if (dev_t->oe_xdelay)
1053 gpmc_t->bool_timings.oe_extra_delay = true;
1054 if (dev_t->we_xdelay)
1055 gpmc_t->bool_timings.we_extra_delay = true;
1056
1057 return 0;
1058}
1059
1060static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t,
1061 struct gpmc_device_timings *dev_t)
1062{
1063 u32 temp;
1064
1065 /* cs_on */
1066 gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu);
1067
1068 /* adv_on */
1069 temp = dev_t->t_avdasu;
1070 if (dev_t->t_ce_avd)
1071 temp = max_t(u32, temp,
1072 gpmc_t->cs_on + dev_t->t_ce_avd);
1073 gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp);
1074
1075 if (dev_t->sync_write || dev_t->sync_read)
1076 gpmc_calc_sync_common_timings(gpmc_t, dev_t);
1077
1078 return 0;
1079}
1080
1081/* TODO: remove this function once all peripherals are confirmed to
1082 * work with generic timing. Simultaneously gpmc_cs_set_timings()
1083 * has to be modified to handle timings in ps instead of ns
1084*/
1085static void gpmc_convert_ps_to_ns(struct gpmc_timings *t)
1086{
1087 t->cs_on /= 1000;
1088 t->cs_rd_off /= 1000;
1089 t->cs_wr_off /= 1000;
1090 t->adv_on /= 1000;
1091 t->adv_rd_off /= 1000;
1092 t->adv_wr_off /= 1000;
1093 t->we_on /= 1000;
1094 t->we_off /= 1000;
1095 t->oe_on /= 1000;
1096 t->oe_off /= 1000;
1097 t->page_burst_access /= 1000;
1098 t->access /= 1000;
1099 t->rd_cycle /= 1000;
1100 t->wr_cycle /= 1000;
1101 t->bus_turnaround /= 1000;
1102 t->cycle2cycle_delay /= 1000;
1103 t->wait_monitoring /= 1000;
1104 t->clk_activation /= 1000;
1105 t->wr_access /= 1000;
1106 t->wr_data_mux_bus /= 1000;
1107}
1108
1109int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
1110 struct gpmc_device_timings *dev_t)
1111{
1112 memset(gpmc_t, 0, sizeof(*gpmc_t));
1113
1114 gpmc_calc_common_timings(gpmc_t, dev_t);
1115
1116 if (dev_t->sync_read)
1117 gpmc_calc_sync_read_timings(gpmc_t, dev_t);
1118 else
1119 gpmc_calc_async_read_timings(gpmc_t, dev_t);
1120
1121 if (dev_t->sync_write)
1122 gpmc_calc_sync_write_timings(gpmc_t, dev_t);
1123 else
1124 gpmc_calc_async_write_timings(gpmc_t, dev_t);
1125
1126 /* TODO: remove, see function definition */
1127 gpmc_convert_ps_to_ns(gpmc_t);
1128
1129 return 0;
1130}
1131
bc6b1e7b
DM		 1132#ifdef CONFIG_OF
1133static struct of_device_id gpmc_dt_ids[] = {
1134 { .compatible = "ti,omap2420-gpmc" },
1135 { .compatible = "ti,omap2430-gpmc" },
1136 { .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */
1137 { .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */
1138 { .compatible = "ti,am3352-gpmc" }, /* am335x devices */
1139 { }
1140};
1141MODULE_DEVICE_TABLE(of, gpmc_dt_ids);
1142
1143static void __maybe_unused gpmc_read_timings_dt(struct device_node *np,
1144 struct gpmc_timings *gpmc_t)
1145{
1146 u32 val;
1147
1148 memset(gpmc_t, 0, sizeof(*gpmc_t));
1149
1150 /* minimum clock period for syncronous mode */
1151 if (!of_property_read_u32(np, "gpmc,sync-clk", &val))
1152 gpmc_t->sync_clk = val;
1153
1154 /* chip select timtings */
1155 if (!of_property_read_u32(np, "gpmc,cs-on", &val))
1156 gpmc_t->cs_on = val;
1157
1158 if (!of_property_read_u32(np, "gpmc,cs-rd-off", &val))
1159 gpmc_t->cs_rd_off = val;
1160
1161 if (!of_property_read_u32(np, "gpmc,cs-wr-off", &val))
1162 gpmc_t->cs_wr_off = val;
1163
1164 /* ADV signal timings */
1165 if (!of_property_read_u32(np, "gpmc,adv-on", &val))
1166 gpmc_t->adv_on = val;
1167
1168 if (!of_property_read_u32(np, "gpmc,adv-rd-off", &val))
1169 gpmc_t->adv_rd_off = val;
1170
1171 if (!of_property_read_u32(np, "gpmc,adv-wr-off", &val))
1172 gpmc_t->adv_wr_off = val;
1173
1174 /* WE signal timings */
1175 if (!of_property_read_u32(np, "gpmc,we-on", &val))
1176 gpmc_t->we_on = val;
1177
1178 if (!of_property_read_u32(np, "gpmc,we-off", &val))
1179 gpmc_t->we_off = val;
1180
1181 /* OE signal timings */
1182 if (!of_property_read_u32(np, "gpmc,oe-on", &val))
1183 gpmc_t->oe_on = val;
1184
1185 if (!of_property_read_u32(np, "gpmc,oe-off", &val))
1186 gpmc_t->oe_off = val;
1187
1188 /* access and cycle timings */
1189 if (!of_property_read_u32(np, "gpmc,page-burst-access", &val))
1190 gpmc_t->page_burst_access = val;
1191
1192 if (!of_property_read_u32(np, "gpmc,access", &val))
1193 gpmc_t->access = val;
1194
1195 if (!of_property_read_u32(np, "gpmc,rd-cycle", &val))
1196 gpmc_t->rd_cycle = val;
1197
1198 if (!of_property_read_u32(np, "gpmc,wr-cycle", &val))
1199 gpmc_t->wr_cycle = val;
1200
1201 /* only for OMAP3430 */
1202 if (!of_property_read_u32(np, "gpmc,wr-access", &val))
1203 gpmc_t->wr_access = val;
1204
1205 if (!of_property_read_u32(np, "gpmc,wr-data-mux-bus", &val))
1206 gpmc_t->wr_data_mux_bus = val;
1207}
1208
1209#ifdef CONFIG_MTD_NAND
1210
1211static const char * const nand_ecc_opts[] = {
1212 [OMAP_ECC_HAMMING_CODE_DEFAULT] = "sw",
1213 [OMAP_ECC_HAMMING_CODE_HW] = "hw",
1214 [OMAP_ECC_HAMMING_CODE_HW_ROMCODE] = "hw-romcode",
1215 [OMAP_ECC_BCH4_CODE_HW] = "bch4",
1216 [OMAP_ECC_BCH8_CODE_HW] = "bch8",
1217};
1218
1219static int gpmc_probe_nand_child(struct platform_device *pdev,
1220 struct device_node *child)
1221{
1222 u32 val;
1223 const char *s;
1224 struct gpmc_timings gpmc_t;
1225 struct omap_nand_platform_data *gpmc_nand_data;
1226
1227 if (of_property_read_u32(child, "reg", &val) < 0) {
1228 dev_err(&pdev->dev, "%s has no 'reg' property\n",
1229 child->full_name);
1230 return -ENODEV;
1231 }
1232
1233 gpmc_nand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_nand_data),
1234 GFP_KERNEL);
1235 if (!gpmc_nand_data)
1236 return -ENOMEM;
1237
1238 gpmc_nand_data->cs = val;
1239 gpmc_nand_data->of_node = child;
1240
1241 if (!of_property_read_string(child, "ti,nand-ecc-opt", &s))
1242 for (val = 0; val < ARRAY_SIZE(nand_ecc_opts); val++)
1243 if (!strcasecmp(s, nand_ecc_opts[val])) {
1244 gpmc_nand_data->ecc_opt = val;
1245 break;
1246 }
1247
1248 val = of_get_nand_bus_width(child);
1249 if (val == 16)
1250 gpmc_nand_data->devsize = NAND_BUSWIDTH_16;
1251
1252 gpmc_read_timings_dt(child, &gpmc_t);
1253 gpmc_nand_init(gpmc_nand_data, &gpmc_t);
1254
1255 return 0;
1256}
1257#else
1258static int gpmc_probe_nand_child(struct platform_device *pdev,
1259 struct device_node *child)
1260{
1261 return 0;
1262}
1263#endif
1264
75d3625e
EG		 1265#ifdef CONFIG_MTD_ONENAND
1266static int gpmc_probe_onenand_child(struct platform_device *pdev,
1267 struct device_node *child)
1268{
1269 u32 val;
1270 struct omap_onenand_platform_data *gpmc_onenand_data;
1271
1272 if (of_property_read_u32(child, "reg", &val) < 0) {
1273 dev_err(&pdev->dev, "%s has no 'reg' property\n",
1274 child->full_name);
1275 return -ENODEV;
1276 }
1277
1278 gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data),
1279 GFP_KERNEL);
1280 if (!gpmc_onenand_data)
1281 return -ENOMEM;
1282
1283 gpmc_onenand_data->cs = val;
1284 gpmc_onenand_data->of_node = child;
1285 gpmc_onenand_data->dma_channel = -1;
1286
1287 if (!of_property_read_u32(child, "dma-channel", &val))
1288 gpmc_onenand_data->dma_channel = val;
1289
1290 gpmc_onenand_init(gpmc_onenand_data);
1291
1292 return 0;
1293}
1294#else
1295static int gpmc_probe_onenand_child(struct platform_device *pdev,
1296 struct device_node *child)
1297{
1298 return 0;
1299}
1300#endif
1301
bc6b1e7b
DM		 1302static int gpmc_probe_dt(struct platform_device *pdev)
1303{
1304 int ret;
1305 struct device_node *child;
1306 const struct of_device_id *of_id =
1307 of_match_device(gpmc_dt_ids, &pdev->dev);
1308
1309 if (!of_id)
1310 return 0;
1311
1312 for_each_node_by_name(child, "nand") {
1313 ret = gpmc_probe_nand_child(pdev, child);
a1672370
EG		 1314 if (ret < 0) {
1315 of_node_put(child);
bc6b1e7b 1316 return ret;
a1672370 1317 }
bc6b1e7b
DM		 1318 }
1319
75d3625e
EG		 1320 for_each_node_by_name(child, "onenand") {
1321 ret = gpmc_probe_onenand_child(pdev, child);
1322 if (ret < 0) {
1323 of_node_put(child);
1324 return ret;
1325 }
1326 }
bc6b1e7b
DM		 1327 return 0;
1328}
1329#else
1330static int gpmc_probe_dt(struct platform_device *pdev)
1331{
1332 return 0;
1333}
1334#endif
1335
351a102d 1336static int gpmc_probe(struct platform_device *pdev)
4bbbc1ad 1337{
8119024e 1338 int rc;
6b6c32fc 1339 u32 l;
da496873 1340 struct resource *res;
4bbbc1ad 1341
da496873
AM		 1342 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1343 if (res == NULL)
1344 return -ENOENT;
8d08436d 1345
da496873
AM		 1346 phys_base = res->start;
1347 mem_size = resource_size(res);
fd1dc87d 1348
5857bd98
TR		 1349 gpmc_base = devm_ioremap_resource(&pdev->dev, res);
1350 if (IS_ERR(gpmc_base))
1351 return PTR_ERR(gpmc_base);
da496873
AM		 1352
1353 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1354 if (res == NULL)
1355 dev_warn(&pdev->dev, "Failed to get resource: irq\n");
1356 else
1357 gpmc_irq = res->start;
1358
1359 gpmc_l3_clk = clk_get(&pdev->dev, "fck");
1360 if (IS_ERR(gpmc_l3_clk)) {
1361 dev_err(&pdev->dev, "error: clk_get\n");
1362 gpmc_irq = 0;
1363 return PTR_ERR(gpmc_l3_clk);
fd1dc87d
PW		 1364 }
1365
4d7cb45e 1366 clk_prepare_enable(gpmc_l3_clk);
1daa8c1d 1367
da496873
AM		 1368 gpmc_dev = &pdev->dev;
1369
4bbbc1ad 1370 l = gpmc_read_reg(GPMC_REVISION);
da496873
AM		 1371 if (GPMC_REVISION_MAJOR(l) > 0x4)
1372 gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS;
1373 dev_info(gpmc_dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l),
1374 GPMC_REVISION_MINOR(l));
1375
8119024e 1376 rc = gpmc_mem_init();
71856843 1377 if (rc < 0) {
8119024e
JH		 1378 clk_disable_unprepare(gpmc_l3_clk);
1379 clk_put(gpmc_l3_clk);
1380 dev_err(gpmc_dev, "failed to reserve memory\n");
1381 return rc;
1382 }
db97eb7d 1383
71856843 1384 if (gpmc_setup_irq() < 0)
da496873
AM		 1385 dev_warn(gpmc_dev, "gpmc_setup_irq failed\n");
1386
31d9adca
JH		 1387 /* Now the GPMC is initialised, unreserve the chip-selects */
1388 gpmc_cs_map = 0;
1389
bc6b1e7b
DM		 1390 rc = gpmc_probe_dt(pdev);
1391 if (rc < 0) {
1392 clk_disable_unprepare(gpmc_l3_clk);
1393 clk_put(gpmc_l3_clk);
1394 dev_err(gpmc_dev, "failed to probe DT parameters\n");
1395 return rc;
1396 }
1397
da496873
AM		 1398 return 0;
1399}
1400
351a102d 1401static int gpmc_remove(struct platform_device *pdev)
da496873
AM		 1402{
1403 gpmc_free_irq();
1404 gpmc_mem_exit();
1405 gpmc_dev = NULL;
1406 return 0;
1407}
1408
1409static struct platform_driver gpmc_driver = {
1410 .probe = gpmc_probe,
351a102d 1411 .remove = gpmc_remove,
da496873
AM		 1412 .driver = {
1413 .name = DEVICE_NAME,
1414 .owner = THIS_MODULE,
bc6b1e7b 1415 .of_match_table = of_match_ptr(gpmc_dt_ids),
da496873
AM		 1416 },
1417};
1418
1419static __init int gpmc_init(void)
1420{
1421 return platform_driver_register(&gpmc_driver);
1422}
1423
1424static __exit void gpmc_exit(void)
1425{
1426 platform_driver_unregister(&gpmc_driver);
1427
db97eb7d 1428}
da496873 1429
b76c8b19 1430omap_postcore_initcall(gpmc_init);
da496873 1431module_exit(gpmc_exit);
db97eb7d 1432
4be48fd5
AM		 1433static int __init omap_gpmc_init(void)
1434{
1435 struct omap_hwmod *oh;
1436 struct platform_device *pdev;
1437 char *oh_name = "gpmc";
1438
2f98ca89
DM		 1439 /*
1440 * if the board boots up with a populated DT, do not
1441 * manually add the device from this initcall
1442 */
1443 if (of_have_populated_dt())
1444 return -ENODEV;
1445
4be48fd5
AM		 1446 oh = omap_hwmod_lookup(oh_name);
1447 if (!oh) {
1448 pr_err("Could not look up %s\n", oh_name);
1449 return -ENODEV;
1450 }
1451
c1d1cd59 1452 pdev = omap_device_build(DEVICE_NAME, -1, oh, NULL, 0);
4be48fd5
AM		 1453 WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
1454
1455 return IS_ERR(pdev) ? PTR_ERR(pdev) : 0;
1456}
b76c8b19 1457omap_postcore_initcall(omap_gpmc_init);
4be48fd5 1458
db97eb7d
SG		 1459static irqreturn_t gpmc_handle_irq(int irq, void *dev)
1460{
6b6c32fc
AM		 1461 int i;
1462 u32 regval;
1463
1464 regval = gpmc_read_reg(GPMC_IRQSTATUS);
1465
1466 if (!regval)
1467 return IRQ_NONE;
1468
1469 for (i = 0; i < GPMC_NR_IRQ; i++)
1470 if (regval & gpmc_client_irq[i].bitmask)
1471 generic_handle_irq(gpmc_client_irq[i].irq);
db97eb7d 1472
6b6c32fc 1473 gpmc_write_reg(GPMC_IRQSTATUS, regval);
db97eb7d
SG		 1474
1475 return IRQ_HANDLED;
4bbbc1ad 1476}
a2d3e7ba
RN		 1477
1478#ifdef CONFIG_ARCH_OMAP3
1479static struct omap3_gpmc_regs gpmc_context;
1480
b2fa3b7c 1481void omap3_gpmc_save_context(void)
a2d3e7ba
RN		 1482{
1483 int i;
b2fa3b7c 1484
a2d3e7ba
RN		 1485 gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG);
1486 gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE);
1487 gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL);
1488 gpmc_context.config = gpmc_read_reg(GPMC_CONFIG);
1489 gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1);
1490 gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2);
1491 gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL);
1492 for (i = 0; i < GPMC_CS_NUM; i++) {
1493 gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i);
1494 if (gpmc_context.cs_context[i].is_valid) {
1495 gpmc_context.cs_context[i].config1 =
1496 gpmc_cs_read_reg(i, GPMC_CS_CONFIG1);
1497 gpmc_context.cs_context[i].config2 =
1498 gpmc_cs_read_reg(i, GPMC_CS_CONFIG2);
1499 gpmc_context.cs_context[i].config3 =
1500 gpmc_cs_read_reg(i, GPMC_CS_CONFIG3);
1501 gpmc_context.cs_context[i].config4 =
1502 gpmc_cs_read_reg(i, GPMC_CS_CONFIG4);
1503 gpmc_context.cs_context[i].config5 =
1504 gpmc_cs_read_reg(i, GPMC_CS_CONFIG5);
1505 gpmc_context.cs_context[i].config6 =
1506 gpmc_cs_read_reg(i, GPMC_CS_CONFIG6);
1507 gpmc_context.cs_context[i].config7 =
1508 gpmc_cs_read_reg(i, GPMC_CS_CONFIG7);
1509 }
1510 }
1511}
1512
b2fa3b7c 1513void omap3_gpmc_restore_context(void)
a2d3e7ba
RN		 1514{
1515 int i;
b2fa3b7c 1516
a2d3e7ba
RN		 1517 gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig);
1518 gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable);
1519 gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl);
1520 gpmc_write_reg(GPMC_CONFIG, gpmc_context.config);
1521 gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1);
1522 gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2);
1523 gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control);
1524 for (i = 0; i < GPMC_CS_NUM; i++) {
1525 if (gpmc_context.cs_context[i].is_valid) {
1526 gpmc_cs_write_reg(i, GPMC_CS_CONFIG1,
1527 gpmc_context.cs_context[i].config1);
1528 gpmc_cs_write_reg(i, GPMC_CS_CONFIG2,
1529 gpmc_context.cs_context[i].config2);
1530 gpmc_cs_write_reg(i, GPMC_CS_CONFIG3,
1531 gpmc_context.cs_context[i].config3);
1532 gpmc_cs_write_reg(i, GPMC_CS_CONFIG4,
1533 gpmc_context.cs_context[i].config4);
1534 gpmc_cs_write_reg(i, GPMC_CS_CONFIG5,
1535 gpmc_context.cs_context[i].config5);
1536 gpmc_cs_write_reg(i, GPMC_CS_CONFIG6,
1537 gpmc_context.cs_context[i].config6);
1538 gpmc_cs_write_reg(i, GPMC_CS_CONFIG7,
1539 gpmc_context.cs_context[i].config7);
1540 }
1541 }
1542}
1543#endif /* CONFIG_ARCH_OMAP3 */
Linux 6.x block layer and io_uring tree(s)