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sm501: gpio I2C support
[linux-2.6/mini2440.git] / drivers / mfd / sm501.c
blob107215b28805b9e6b500615e007947a7e09b737f
1 /* linux/drivers/mfd/sm501.c
2 *
3 * Copyright (C) 2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 * Vincent Sanders <vince@simtec.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * SM501 MFD driver
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/delay.h>
17 #include <linux/init.h>
18 #include <linux/list.h>
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/pci.h>
22 #include <linux/gpio.h>
23 #include <linux/i2c-gpio.h>
24
25 #include <linux/sm501.h>
26 #include <linux/sm501-regs.h>
27 #include <linux/serial_8250.h>
28
29 #include <asm/io.h>
30
31 struct sm501_device {
32 struct list_head list;
33 struct platform_device pdev;
34 };
35
36 struct sm501_gpio;
37
38 struct sm501_gpio_chip {
39 struct gpio_chip gpio;
40 struct sm501_gpio *ourgpio; /* to get back to parent. */
41 void __iomem *regbase;
42 };
43
44 struct sm501_gpio {
45 struct sm501_gpio_chip low;
46 struct sm501_gpio_chip high;
47 spinlock_t lock;
48
49 unsigned int registered : 1;
50 void __iomem *regs;
51 struct resource *regs_res;
52 };
53
54 struct sm501_devdata {
55 spinlock_t reg_lock;
56 struct mutex clock_lock;
57 struct list_head devices;
58 struct sm501_gpio gpio;
59
60 struct device *dev;
61 struct resource *io_res;
62 struct resource *mem_res;
63 struct resource *regs_claim;
64 struct sm501_platdata *platdata;
65
66
67 unsigned int in_suspend;
68 unsigned long pm_misc;
69
70 int unit_power[20];
71 unsigned int pdev_id;
72 unsigned int irq;
73 void __iomem *regs;
74 unsigned int rev;
75 };
76
77
78 #define MHZ (1000 * 1000)
79
80 #ifdef DEBUG
81 static const unsigned int div_tab[] = {
82 [0] = 1,
83 [1] = 2,
84 [2] = 4,
85 [3] = 8,
86 [4] = 16,
87 [5] = 32,
88 [6] = 64,
89 [7] = 128,
90 [8] = 3,
91 [9] = 6,
92 [10] = 12,
93 [11] = 24,
94 [12] = 48,
95 [13] = 96,
96 [14] = 192,
97 [15] = 384,
98 [16] = 5,
99 [17] = 10,
100 [18] = 20,
101 [19] = 40,
102 [20] = 80,
103 [21] = 160,
104 [22] = 320,
105 [23] = 604,
106 };
107
108 static unsigned long decode_div(unsigned long pll2, unsigned long val,
109 unsigned int lshft, unsigned int selbit,
110 unsigned long mask)
111 {
112 if (val & selbit)
113 pll2 = 288 * MHZ;
114
115 return pll2 / div_tab[(val >> lshft) & mask];
116 }
117
118 #define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
119
120 /* sm501_dump_clk
121 *
122 * Print out the current clock configuration for the device
123 */
124
125 static void sm501_dump_clk(struct sm501_devdata *sm)
126 {
127 unsigned long misct = readl(sm->regs + SM501_MISC_TIMING);
128 unsigned long pm0 = readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
129 unsigned long pm1 = readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
130 unsigned long pmc = readl(sm->regs + SM501_POWER_MODE_CONTROL);
131 unsigned long sdclk0, sdclk1;
132 unsigned long pll2 = 0;
133
134 switch (misct & 0x30) {
135 case 0x00:
136 pll2 = 336 * MHZ;
137 break;
138 case 0x10:
139 pll2 = 288 * MHZ;
140 break;
141 case 0x20:
142 pll2 = 240 * MHZ;
143 break;
144 case 0x30:
145 pll2 = 192 * MHZ;
146 break;
147 }
148
149 sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ;
150 sdclk0 /= div_tab[((misct >> 8) & 0xf)];
151
152 sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ;
153 sdclk1 /= div_tab[((misct >> 16) & 0xf)];
154
155 dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n",
156 misct, pm0, pm1);
157
158 dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n",
159 fmt_freq(pll2), sdclk0, sdclk1);
160
161 dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1);
162
163 dev_dbg(sm->dev, "PM0[%c]: "
164 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
165 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
166 (pmc & 3 ) == 0 ? '*' : '-',
167 fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)),
168 fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)),
169 fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)),
170 fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15)));
171
172 dev_dbg(sm->dev, "PM1[%c]: "
173 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
174 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
175 (pmc & 3 ) == 1 ? '*' : '-',
176 fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)),
177 fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)),
178 fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)),
179 fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15)));
180 }
181
182 static void sm501_dump_regs(struct sm501_devdata *sm)
183 {
184 void __iomem *regs = sm->regs;
185
186 dev_info(sm->dev, "System Control %08x\n",
187 readl(regs + SM501_SYSTEM_CONTROL));
188 dev_info(sm->dev, "Misc Control %08x\n",
189 readl(regs + SM501_MISC_CONTROL));
190 dev_info(sm->dev, "GPIO Control Low %08x\n",
191 readl(regs + SM501_GPIO31_0_CONTROL));
192 dev_info(sm->dev, "GPIO Control Hi %08x\n",
193 readl(regs + SM501_GPIO63_32_CONTROL));
194 dev_info(sm->dev, "DRAM Control %08x\n",
195 readl(regs + SM501_DRAM_CONTROL));
196 dev_info(sm->dev, "Arbitration Ctrl %08x\n",
197 readl(regs + SM501_ARBTRTN_CONTROL));
198 dev_info(sm->dev, "Misc Timing %08x\n",
199 readl(regs + SM501_MISC_TIMING));
200 }
201
202 static void sm501_dump_gate(struct sm501_devdata *sm)
203 {
204 dev_info(sm->dev, "CurrentGate %08x\n",
205 readl(sm->regs + SM501_CURRENT_GATE));
206 dev_info(sm->dev, "CurrentClock %08x\n",
207 readl(sm->regs + SM501_CURRENT_CLOCK));
208 dev_info(sm->dev, "PowerModeControl %08x\n",
209 readl(sm->regs + SM501_POWER_MODE_CONTROL));
210 }
211
212 #else
213 static inline void sm501_dump_gate(struct sm501_devdata *sm) { }
214 static inline void sm501_dump_regs(struct sm501_devdata *sm) { }
215 static inline void sm501_dump_clk(struct sm501_devdata *sm) { }
216 #endif
217
218 /* sm501_sync_regs
219 *
220 * ensure the
221 */
222
223 static void sm501_sync_regs(struct sm501_devdata *sm)
224 {
225 readl(sm->regs);
226 }
227
228 static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay)
229 {
230 /* during suspend/resume, we are currently not allowed to sleep,
231 * so change to using mdelay() instead of msleep() if we
232 * are in one of these paths */
233
234 if (sm->in_suspend)
235 mdelay(delay);
236 else
237 msleep(delay);
238 }
239
240 /* sm501_misc_control
241 *
242 * alters the miscellaneous control parameters
243 */
244
245 int sm501_misc_control(struct device *dev,
246 unsigned long set, unsigned long clear)
247 {
248 struct sm501_devdata *sm = dev_get_drvdata(dev);
249 unsigned long misc;
250 unsigned long save;
251 unsigned long to;
252
253 spin_lock_irqsave(&sm->reg_lock, save);
254
255 misc = readl(sm->regs + SM501_MISC_CONTROL);
256 to = (misc & ~clear) | set;
257
258 if (to != misc) {
259 writel(to, sm->regs + SM501_MISC_CONTROL);
260 sm501_sync_regs(sm);
261
262 dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc);
263 }
264
265 spin_unlock_irqrestore(&sm->reg_lock, save);
266 return to;
267 }
268
269 EXPORT_SYMBOL_GPL(sm501_misc_control);
270
271 /* sm501_modify_reg
272 *
273 * Modify a register in the SM501 which may be shared with other
274 * drivers.
275 */
276
277 unsigned long sm501_modify_reg(struct device *dev,
278 unsigned long reg,
279 unsigned long set,
280 unsigned long clear)
281 {
282 struct sm501_devdata *sm = dev_get_drvdata(dev);
283 unsigned long data;
284 unsigned long save;
285
286 spin_lock_irqsave(&sm->reg_lock, save);
287
288 data = readl(sm->regs + reg);
289 data |= set;
290 data &= ~clear;
291
292 writel(data, sm->regs + reg);
293 sm501_sync_regs(sm);
294
295 spin_unlock_irqrestore(&sm->reg_lock, save);
296
297 return data;
298 }
299
300 EXPORT_SYMBOL_GPL(sm501_modify_reg);
301
302 /* sm501_unit_power
303 *
304 * alters the power active gate to set specific units on or off
305 */
306
307 int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
308 {
309 struct sm501_devdata *sm = dev_get_drvdata(dev);
310 unsigned long mode;
311 unsigned long gate;
312 unsigned long clock;
313
314 mutex_lock(&sm->clock_lock);
315
316 mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
317 gate = readl(sm->regs + SM501_CURRENT_GATE);
318 clock = readl(sm->regs + SM501_CURRENT_CLOCK);
319
320 mode &= 3; /* get current power mode */
321
322 if (unit >= ARRAY_SIZE(sm->unit_power)) {
323 dev_err(dev, "%s: bad unit %d\n", __func__, unit);
324 goto already;
325 }
326
327 dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit,
328 sm->unit_power[unit], to);
329
330 if (to == 0 && sm->unit_power[unit] == 0) {
331 dev_err(sm->dev, "unit %d is already shutdown\n", unit);
332 goto already;
333 }
334
335 sm->unit_power[unit] += to ? 1 : -1;
336 to = sm->unit_power[unit] ? 1 : 0;
337
338 if (to) {
339 if (gate & (1 << unit))
340 goto already;
341 gate |= (1 << unit);
342 } else {
343 if (!(gate & (1 << unit)))
344 goto already;
345 gate &= ~(1 << unit);
346 }
347
348 switch (mode) {
349 case 1:
350 writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
351 writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
352 mode = 0;
353 break;
354 case 2:
355 case 0:
356 writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
357 writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
358 mode = 1;
359 break;
360
361 default:
362 return -1;
363 }
364
365 writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
366 sm501_sync_regs(sm);
367
368 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
369 gate, clock, mode);
370
371 sm501_mdelay(sm, 16);
372
373 already:
374 mutex_unlock(&sm->clock_lock);
375 return gate;
376 }
377
378 EXPORT_SYMBOL_GPL(sm501_unit_power);
379
380
381 /* Perform a rounded division. */
382 static long sm501fb_round_div(long num, long denom)
383 {
384 /* n / d + 1 / 2 = (2n + d) / 2d */
385 return (2 * num + denom) / (2 * denom);
386 }
387
388 /* clock value structure. */
389 struct sm501_clock {
390 unsigned long mclk;
391 int divider;
392 int shift;
393 unsigned int m, n, k;
394 };
395
396 /* sm501_calc_clock
397 *
398 * Calculates the nearest discrete clock frequency that
399 * can be achieved with the specified input clock.
400 * the maximum divisor is 3 or 5
401 */
402
403 static int sm501_calc_clock(unsigned long freq,
404 struct sm501_clock *clock,
405 int max_div,
406 unsigned long mclk,
407 long *best_diff)
408 {
409 int ret = 0;
410 int divider;
411 int shift;
412 long diff;
413
414 /* try dividers 1 and 3 for CRT and for panel,
415 try divider 5 for panel only.*/
416
417 for (divider = 1; divider <= max_div; divider += 2) {
418 /* try all 8 shift values.*/
419 for (shift = 0; shift < 8; shift++) {
420 /* Calculate difference to requested clock */
421 diff = sm501fb_round_div(mclk, divider << shift) - freq;
422 if (diff < 0)
423 diff = -diff;
424
425 /* If it is less than the current, use it */
426 if (diff < *best_diff) {
427 *best_diff = diff;
428
429 clock->mclk = mclk;
430 clock->divider = divider;
431 clock->shift = shift;
432 ret = 1;
433 }
434 }
435 }
436
437 return ret;
438 }
439
440 /* sm501_calc_pll
441 *
442 * Calculates the nearest discrete clock frequency that can be
443 * achieved using the programmable PLL.
444 * the maximum divisor is 3 or 5
445 */
446
447 static unsigned long sm501_calc_pll(unsigned long freq,
448 struct sm501_clock *clock,
449 int max_div)
450 {
451 unsigned long mclk;
452 unsigned int m, n, k;
453 long best_diff = 999999999;
454
455 /*
456 * The SM502 datasheet doesn't specify the min/max values for M and N.
457 * N = 1 at least doesn't work in practice.
458 */
459 for (m = 2; m <= 255; m++) {
460 for (n = 2; n <= 127; n++) {
461 for (k = 0; k <= 1; k++) {
462 mclk = (24000000UL * m / n) >> k;
463
464 if (sm501_calc_clock(freq, clock, max_div,
465 mclk, &best_diff)) {
466 clock->m = m;
467 clock->n = n;
468 clock->k = k;
469 }
470 }
471 }
472 }
473
474 /* Return best clock. */
475 return clock->mclk / (clock->divider << clock->shift);
476 }
477
478 /* sm501_select_clock
479 *
480 * Calculates the nearest discrete clock frequency that can be
481 * achieved using the 288MHz and 336MHz PLLs.
482 * the maximum divisor is 3 or 5
483 */
484
485 static unsigned long sm501_select_clock(unsigned long freq,
486 struct sm501_clock *clock,
487 int max_div)
488 {
489 unsigned long mclk;
490 long best_diff = 999999999;
491
492 /* Try 288MHz and 336MHz clocks. */
493 for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) {
494 sm501_calc_clock(freq, clock, max_div, mclk, &best_diff);
495 }
496
497 /* Return best clock. */
498 return clock->mclk / (clock->divider << clock->shift);
499 }
500
501 /* sm501_set_clock
502 *
503 * set one of the four clock sources to the closest available frequency to
504 * the one specified
505 */
506
507 unsigned long sm501_set_clock(struct device *dev,
508 int clksrc,
509 unsigned long req_freq)
510 {
511 struct sm501_devdata *sm = dev_get_drvdata(dev);
512 unsigned long mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
513 unsigned long gate = readl(sm->regs + SM501_CURRENT_GATE);
514 unsigned long clock = readl(sm->regs + SM501_CURRENT_CLOCK);
515 unsigned char reg;
516 unsigned int pll_reg = 0;
517 unsigned long sm501_freq; /* the actual frequency acheived */
518
519 struct sm501_clock to;
520
521 /* find achivable discrete frequency and setup register value
522 * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK
523 * has an extra bit for the divider */
524
525 switch (clksrc) {
526 case SM501_CLOCK_P2XCLK:
527 /* This clock is divided in half so to achive the
528 * requested frequency the value must be multiplied by
529 * 2. This clock also has an additional pre divisor */
530
531 if (sm->rev >= 0xC0) {
532 /* SM502 -> use the programmable PLL */
533 sm501_freq = (sm501_calc_pll(2 * req_freq,
534 &to, 5) / 2);
535 reg = to.shift & 0x07;/* bottom 3 bits are shift */
536 if (to.divider == 3)
537 reg |= 0x08; /* /3 divider required */
538 else if (to.divider == 5)
539 reg |= 0x10; /* /5 divider required */
540 reg |= 0x40; /* select the programmable PLL */
541 pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m;
542 } else {
543 sm501_freq = (sm501_select_clock(2 * req_freq,
544 &to, 5) / 2);
545 reg = to.shift & 0x07;/* bottom 3 bits are shift */
546 if (to.divider == 3)
547 reg |= 0x08; /* /3 divider required */
548 else if (to.divider == 5)
549 reg |= 0x10; /* /5 divider required */
550 if (to.mclk != 288000000)
551 reg |= 0x20; /* which mclk pll is source */
552 }
553 break;
554
555 case SM501_CLOCK_V2XCLK:
556 /* This clock is divided in half so to achive the
557 * requested frequency the value must be multiplied by 2. */
558
559 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
560 reg=to.shift & 0x07; /* bottom 3 bits are shift */
561 if (to.divider == 3)
562 reg |= 0x08; /* /3 divider required */
563 if (to.mclk != 288000000)
564 reg |= 0x10; /* which mclk pll is source */
565 break;
566
567 case SM501_CLOCK_MCLK:
568 case SM501_CLOCK_M1XCLK:
569 /* These clocks are the same and not further divided */
570
571 sm501_freq = sm501_select_clock( req_freq, &to, 3);
572 reg=to.shift & 0x07; /* bottom 3 bits are shift */
573 if (to.divider == 3)
574 reg |= 0x08; /* /3 divider required */
575 if (to.mclk != 288000000)
576 reg |= 0x10; /* which mclk pll is source */
577 break;
578
579 default:
580 return 0; /* this is bad */
581 }
582
583 mutex_lock(&sm->clock_lock);
584
585 mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
586 gate = readl(sm->regs + SM501_CURRENT_GATE);
587 clock = readl(sm->regs + SM501_CURRENT_CLOCK);
588
589 clock = clock & ~(0xFF << clksrc);
590 clock |= reg<<clksrc;
591
592 mode &= 3; /* find current mode */
593
594 switch (mode) {
595 case 1:
596 writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
597 writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
598 mode = 0;
599 break;
600 case 2:
601 case 0:
602 writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
603 writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
604 mode = 1;
605 break;
606
607 default:
608 mutex_unlock(&sm->clock_lock);
609 return -1;
610 }
611
612 writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
613
614 if (pll_reg)
615 writel(pll_reg, sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
616
617 sm501_sync_regs(sm);
618
619 dev_info(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
620 gate, clock, mode);
621
622 sm501_mdelay(sm, 16);
623 mutex_unlock(&sm->clock_lock);
624
625 sm501_dump_clk(sm);
626
627 return sm501_freq;
628 }
629
630 EXPORT_SYMBOL_GPL(sm501_set_clock);
631
632 /* sm501_find_clock
633 *
634 * finds the closest available frequency for a given clock
635 */
636
637 unsigned long sm501_find_clock(struct device *dev,
638 int clksrc,
639 unsigned long req_freq)
640 {
641 struct sm501_devdata *sm = dev_get_drvdata(dev);
642 unsigned long sm501_freq; /* the frequency achiveable by the 501 */
643 struct sm501_clock to;
644
645 switch (clksrc) {
646 case SM501_CLOCK_P2XCLK:
647 if (sm->rev >= 0xC0) {
648 /* SM502 -> use the programmable PLL */
649 sm501_freq = (sm501_calc_pll(2 * req_freq,
650 &to, 5) / 2);
651 } else {
652 sm501_freq = (sm501_select_clock(2 * req_freq,
653 &to, 5) / 2);
654 }
655 break;
656
657 case SM501_CLOCK_V2XCLK:
658 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
659 break;
660
661 case SM501_CLOCK_MCLK:
662 case SM501_CLOCK_M1XCLK:
663 sm501_freq = sm501_select_clock(req_freq, &to, 3);
664 break;
665
666 default:
667 sm501_freq = 0; /* error */
668 }
669
670 return sm501_freq;
671 }
672
673 EXPORT_SYMBOL_GPL(sm501_find_clock);
674
675 static struct sm501_device *to_sm_device(struct platform_device *pdev)
676 {
677 return container_of(pdev, struct sm501_device, pdev);
678 }
679
680 /* sm501_device_release
681 *
682 * A release function for the platform devices we create to allow us to
683 * free any items we allocated
684 */
685
686 static void sm501_device_release(struct device *dev)
687 {
688 kfree(to_sm_device(to_platform_device(dev)));
689 }
690
691 /* sm501_create_subdev
692 *
693 * Create a skeleton platform device with resources for passing to a
694 * sub-driver
695 */
696
697 static struct platform_device *
698 sm501_create_subdev(struct sm501_devdata *sm, char *name,
699 unsigned int res_count, unsigned int platform_data_size)
700 {
701 struct sm501_device *smdev;
702
703 smdev = kzalloc(sizeof(struct sm501_device) +
704 (sizeof(struct resource) * res_count) +
705 platform_data_size, GFP_KERNEL);
706 if (!smdev)
707 return NULL;
708
709 smdev->pdev.dev.release = sm501_device_release;
710
711 smdev->pdev.name = name;
712 smdev->pdev.id = sm->pdev_id;
713 smdev->pdev.dev.parent = sm->dev;
714
715 if (res_count) {
716 smdev->pdev.resource = (struct resource *)(smdev+1);
717 smdev->pdev.num_resources = res_count;
718 }
719 if (platform_data_size)
720 smdev->pdev.dev.platform_data = (void *)(smdev+1);
721
722 return &smdev->pdev;
723 }
724
725 /* sm501_register_device
726 *
727 * Register a platform device created with sm501_create_subdev()
728 */
729
730 static int sm501_register_device(struct sm501_devdata *sm,
731 struct platform_device *pdev)
732 {
733 struct sm501_device *smdev = to_sm_device(pdev);
734 int ptr;
735 int ret;
736
737 for (ptr = 0; ptr < pdev->num_resources; ptr++) {
738 printk("%s[%d] flags %08lx: %08llx..%08llx\n",
739 pdev->name, ptr,
740 pdev->resource[ptr].flags,
741 (unsigned long long)pdev->resource[ptr].start,
742 (unsigned long long)pdev->resource[ptr].end);
743 }
744
745 ret = platform_device_register(pdev);
746
747 if (ret >= 0) {
748 dev_dbg(sm->dev, "registered %s\n", pdev->name);
749 list_add_tail(&smdev->list, &sm->devices);
750 } else
751 dev_err(sm->dev, "error registering %s (%d)\n",
752 pdev->name, ret);
753
754 return ret;
755 }
756
757 /* sm501_create_subio
758 *
759 * Fill in an IO resource for a sub device
760 */
761
762 static void sm501_create_subio(struct sm501_devdata *sm,
763 struct resource *res,
764 resource_size_t offs,
765 resource_size_t size)
766 {
767 res->flags = IORESOURCE_MEM;
768 res->parent = sm->io_res;
769 res->start = sm->io_res->start + offs;
770 res->end = res->start + size - 1;
771 }
772
773 /* sm501_create_mem
774 *
775 * Fill in an MEM resource for a sub device
776 */
777
778 static void sm501_create_mem(struct sm501_devdata *sm,
779 struct resource *res,
780 resource_size_t *offs,
781 resource_size_t size)
782 {
783 *offs -= size; /* adjust memory size */
784
785 res->flags = IORESOURCE_MEM;
786 res->parent = sm->mem_res;
787 res->start = sm->mem_res->start + *offs;
788 res->end = res->start + size - 1;
789 }
790
791 /* sm501_create_irq
792 *
793 * Fill in an IRQ resource for a sub device
794 */
795
796 static void sm501_create_irq(struct sm501_devdata *sm,
797 struct resource *res)
798 {
799 res->flags = IORESOURCE_IRQ;
800 res->parent = NULL;
801 res->start = res->end = sm->irq;
802 }
803
804 static int sm501_register_usbhost(struct sm501_devdata *sm,
805 resource_size_t *mem_avail)
806 {
807 struct platform_device *pdev;
808
809 pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0);
810 if (!pdev)
811 return -ENOMEM;
812
813 sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000);
814 sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024);
815 sm501_create_irq(sm, &pdev->resource[2]);
816
817 return sm501_register_device(sm, pdev);
818 }
819
820 static void sm501_setup_uart_data(struct sm501_devdata *sm,
821 struct plat_serial8250_port *uart_data,
822 unsigned int offset)
823 {
824 uart_data->membase = sm->regs + offset;
825 uart_data->mapbase = sm->io_res->start + offset;
826 uart_data->iotype = UPIO_MEM;
827 uart_data->irq = sm->irq;
828 uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ;
829 uart_data->regshift = 2;
830 uart_data->uartclk = (9600 * 16);
831 }
832
833 static int sm501_register_uart(struct sm501_devdata *sm, int devices)
834 {
835 struct platform_device *pdev;
836 struct plat_serial8250_port *uart_data;
837
838 pdev = sm501_create_subdev(sm, "serial8250", 0,
839 sizeof(struct plat_serial8250_port) * 3);
840 if (!pdev)
841 return -ENOMEM;
842
843 uart_data = pdev->dev.platform_data;
844
845 if (devices & SM501_USE_UART0) {
846 sm501_setup_uart_data(sm, uart_data++, 0x30000);
847 sm501_unit_power(sm->dev, SM501_GATE_UART0, 1);
848 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0);
849 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0);
850 }
851 if (devices & SM501_USE_UART1) {
852 sm501_setup_uart_data(sm, uart_data++, 0x30020);
853 sm501_unit_power(sm->dev, SM501_GATE_UART1, 1);
854 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0);
855 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0);
856 }
857
858 pdev->id = PLAT8250_DEV_SM501;
859
860 return sm501_register_device(sm, pdev);
861 }
862
863 static int sm501_register_display(struct sm501_devdata *sm,
864 resource_size_t *mem_avail)
865 {
866 struct platform_device *pdev;
867
868 pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0);
869 if (!pdev)
870 return -ENOMEM;
871
872 sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000);
873 sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000);
874 sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail);
875 sm501_create_irq(sm, &pdev->resource[3]);
876
877 return sm501_register_device(sm, pdev);
878 }
879
880 #ifdef CONFIG_MFD_SM501_GPIO
881
882 static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc)
883 {
884 return container_of(gc, struct sm501_gpio_chip, gpio);
885 }
886
887 static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio)
888 {
889 return container_of(gpio, struct sm501_devdata, gpio);
890 }
891
892 static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset)
893
894 {
895 struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip);
896 unsigned long result;
897
898 result = readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
899 result >>= offset;
900
901 return result & 1UL;
902 }
903
904 static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
905
906 {
907 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
908 struct sm501_gpio *smgpio = smchip->ourgpio;
909 unsigned long bit = 1 << offset;
910 void __iomem *regs = smchip->regbase;
911 unsigned long save;
912 unsigned long val;
913
914 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
915 __func__, chip, offset);
916
917 spin_lock_irqsave(&smgpio->lock, save);
918
919 val = readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
920 if (value)
921 val |= bit;
922 writel(val, regs);
923
924 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
925 spin_unlock_irqrestore(&smgpio->lock, save);
926 }
927
928 static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
929 {
930 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
931 struct sm501_gpio *smgpio = smchip->ourgpio;
932 void __iomem *regs = smchip->regbase;
933 unsigned long bit = 1 << offset;
934 unsigned long save;
935 unsigned long ddr;
936
937 dev_info(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
938 __func__, chip, offset);
939
940 spin_lock_irqsave(&smgpio->lock, save);
941
942 ddr = readl(regs + SM501_GPIO_DDR_LOW);
943 writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
944
945 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
946 spin_unlock_irqrestore(&smgpio->lock, save);
947
948 return 0;
949 }
950
951 static int sm501_gpio_output(struct gpio_chip *chip,
952 unsigned offset, int value)
953 {
954 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
955 struct sm501_gpio *smgpio = smchip->ourgpio;
956 unsigned long bit = 1 << offset;
957 void __iomem *regs = smchip->regbase;
958 unsigned long save;
959 unsigned long val;
960 unsigned long ddr;
961
962 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n",
963 __func__, chip, offset, value);
964
965 spin_lock_irqsave(&smgpio->lock, save);
966
967 val = readl(regs + SM501_GPIO_DATA_LOW);
968 if (value)
969 val |= bit;
970 else
971 val &= ~bit;
972 writel(val, regs);
973
974 ddr = readl(regs + SM501_GPIO_DDR_LOW);
975 writel(ddr | bit, regs + SM501_GPIO_DDR_LOW);
976
977 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
978 writel(val, regs + SM501_GPIO_DATA_LOW);
979
980 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
981 spin_unlock_irqrestore(&smgpio->lock, save);
982
983 return 0;
984 }
985
986 static struct gpio_chip gpio_chip_template = {
987 .ngpio = 32,
988 .direction_input = sm501_gpio_input,
989 .direction_output = sm501_gpio_output,
990 .set = sm501_gpio_set,
991 .get = sm501_gpio_get,
992 };
993
994 static int __devinit sm501_gpio_register_chip(struct sm501_devdata *sm,
995 struct sm501_gpio *gpio,
996 struct sm501_gpio_chip *chip)
997 {
998 struct sm501_platdata *pdata = sm->platdata;
999 struct gpio_chip *gchip = &chip->gpio;
1000 int base = pdata->gpio_base;
1001
1002 memcpy(chip, &gpio_chip_template, sizeof(struct gpio_chip));
1003
1004 if (chip == &gpio->high) {
1005 if (base > 0)
1006 base += 32;
1007 chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH;
1008 gchip->label = "SM501-HIGH";
1009 } else {
1010 chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW;
1011 gchip->label = "SM501-LOW";
1012 }
1013
1014 gchip->base = base;
1015 chip->ourgpio = gpio;
1016
1017 return gpiochip_add(gchip);
1018 }
1019
1020 static int sm501_register_gpio(struct sm501_devdata *sm)
1021 {
1022 struct sm501_gpio *gpio = &sm->gpio;
1023 resource_size_t iobase = sm->io_res->start + SM501_GPIO;
1024 int ret;
1025 int tmp;
1026
1027 dev_dbg(sm->dev, "registering gpio block %08llx\n",
1028 (unsigned long long)iobase);
1029
1030 spin_lock_init(&gpio->lock);
1031
1032 gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio");
1033 if (gpio->regs_res == NULL) {
1034 dev_err(sm->dev, "gpio: failed to request region\n");
1035 return -ENXIO;
1036 }
1037
1038 gpio->regs = ioremap(iobase, 0x20);
1039 if (gpio->regs == NULL) {
1040 dev_err(sm->dev, "gpio: failed to remap registers\n");
1041 ret = -ENXIO;
1042 goto err_mapped;
1043 }
1044
1045 /* Register both our chips. */
1046
1047 ret = sm501_gpio_register_chip(sm, gpio, &gpio->low);
1048 if (ret) {
1049 dev_err(sm->dev, "failed to add low chip\n");
1050 goto err_mapped;
1051 }
1052
1053 ret = sm501_gpio_register_chip(sm, gpio, &gpio->high);
1054 if (ret) {
1055 dev_err(sm->dev, "failed to add high chip\n");
1056 goto err_low_chip;
1057 }
1058
1059 gpio->registered = 1;
1060
1061 return 0;
1062
1063 err_low_chip:
1064 tmp = gpiochip_remove(&gpio->low.gpio);
1065 if (tmp) {
1066 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1067 return ret;
1068 }
1069
1070 err_mapped:
1071 release_resource(gpio->regs_res);
1072 kfree(gpio->regs_res);
1073
1074 return ret;
1075 }
1076
1077 static void sm501_gpio_remove(struct sm501_devdata *sm)
1078 {
1079 int ret;
1080
1081 ret = gpiochip_remove(&sm->gpio.low.gpio);
1082 if (ret)
1083 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1084
1085 ret = gpiochip_remove(&sm->gpio.high.gpio);
1086 if (ret)
1087 dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n");
1088 }
1089
1090 static int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
1091 {
1092 struct sm501_gpio *gpio = &sm->gpio;
1093 return pin + (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base;
1094 }
1095 #else
1096 static int sm501_register_gpio(struct sm501_devdata *sm)
1097 {
1098 return 0;
1099 }
1100
1101 static void sm501_gpio_remove(struct sm501_devdata *sm)
1102 {
1103 }
1104
1105 static int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
1106 {
1107 return -1;
1108 }
1109 #endif
1110
1111 static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
1112 struct sm501_platdata_gpio_i2c *iic)
1113 {
1114 struct i2c_gpio_platform_data *icd;
1115 struct platform_device *pdev;
1116
1117 pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
1118 sizeof(struct i2c_gpio_platform_data));
1119 if (!pdev)
1120 return -ENOMEM;
1121
1122 icd = pdev->dev.platform_data;
1123
1124 /* We keep the pin_sda and pin_scl fields relative in case the
1125 * same platform data is passed to >1 SM501.
1126 */
1127
1128 icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda);
1129 icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl);
1130 icd->timeout = iic->timeout;
1131 icd->udelay = iic->udelay;
1132
1133 /* note, we can't use either of the pin numbers, as the i2c-gpio
1134 * driver uses the platform.id field to generate the bus number
1135 * to register with the i2c core; The i2c core doesn't have enough
1136 * entries to deal with anything we currently use.
1137 */
1138
1139 pdev->id = iic->bus_num;
1140
1141 dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n",
1142 iic->bus_num,
1143 icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl);
1144
1145 return sm501_register_device(sm, pdev);
1146 }
1147
1148 static int sm501_register_gpio_i2c(struct sm501_devdata *sm,
1149 struct sm501_platdata *pdata)
1150 {
1151 struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c;
1152 int index;
1153 int ret;
1154
1155 for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) {
1156 ret = sm501_register_gpio_i2c_instance(sm, iic);
1157 if (ret < 0)
1158 return ret;
1159 }
1160
1161 return 0;
1162 }
1163
1164 /* sm501_dbg_regs
1165 *
1166 * Debug attribute to attach to parent device to show core registers
1167 */
1168
1169 static ssize_t sm501_dbg_regs(struct device *dev,
1170 struct device_attribute *attr, char *buff)
1171 {
1172 struct sm501_devdata *sm = dev_get_drvdata(dev) ;
1173 unsigned int reg;
1174 char *ptr = buff;
1175 int ret;
1176
1177 for (reg = 0x00; reg < 0x70; reg += 4) {
1178 ret = sprintf(ptr, "%08x = %08x\n",
1179 reg, readl(sm->regs + reg));
1180 ptr += ret;
1181 }
1182
1183 return ptr - buff;
1184 }
1185
1186
1187 static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL);
1188
1189 /* sm501_init_reg
1190 *
1191 * Helper function for the init code to setup a register
1192 *
1193 * clear the bits which are set in r->mask, and then set
1194 * the bits set in r->set.
1195 */
1196
1197 static inline void sm501_init_reg(struct sm501_devdata *sm,
1198 unsigned long reg,
1199 struct sm501_reg_init *r)
1200 {
1201 unsigned long tmp;
1202
1203 tmp = readl(sm->regs + reg);
1204 tmp &= ~r->mask;
1205 tmp |= r->set;
1206 writel(tmp, sm->regs + reg);
1207 }
1208
1209 /* sm501_init_regs
1210 *
1211 * Setup core register values
1212 */
1213
1214 static void sm501_init_regs(struct sm501_devdata *sm,
1215 struct sm501_initdata *init)
1216 {
1217 sm501_misc_control(sm->dev,
1218 init->misc_control.set,
1219 init->misc_control.mask);
1220
1221 sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing);
1222 sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low);
1223 sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high);
1224
1225 if (init->m1xclk) {
1226 dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk);
1227 sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk);
1228 }
1229
1230 if (init->mclk) {
1231 dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
1232 sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
1233 }
1234
1235 }
1236
1237 /* Check the PLL sources for the M1CLK and M1XCLK
1238 *
1239 * If the M1CLK and M1XCLKs are not sourced from the same PLL, then
1240 * there is a risk (see errata AB-5) that the SM501 will cease proper
1241 * function. If this happens, then it is likely the SM501 will
1242 * hang the system.
1243 */
1244
1245 static int sm501_check_clocks(struct sm501_devdata *sm)
1246 {
1247 unsigned long pwrmode = readl(sm->regs + SM501_CURRENT_CLOCK);
1248 unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC);
1249 unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC);
1250
1251 return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0));
1252 }
1253
1254 static unsigned int sm501_mem_local[] = {
1255 [0] = 4*1024*1024,
1256 [1] = 8*1024*1024,
1257 [2] = 16*1024*1024,
1258 [3] = 32*1024*1024,
1259 [4] = 64*1024*1024,
1260 [5] = 2*1024*1024,
1261 };
1262
1263 /* sm501_init_dev
1264 *
1265 * Common init code for an SM501
1266 */
1267
1268 static int sm501_init_dev(struct sm501_devdata *sm)
1269 {
1270 struct sm501_initdata *idata;
1271 struct sm501_platdata *pdata;
1272 resource_size_t mem_avail;
1273 unsigned long dramctrl;
1274 unsigned long devid;
1275 int ret;
1276
1277 mutex_init(&sm->clock_lock);
1278 spin_lock_init(&sm->reg_lock);
1279
1280 INIT_LIST_HEAD(&sm->devices);
1281
1282 devid = readl(sm->regs + SM501_DEVICEID);
1283
1284 if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) {
1285 dev_err(sm->dev, "incorrect device id %08lx\n", devid);
1286 return -EINVAL;
1287 }
1288
1289 /* disable irqs */
1290 writel(0, sm->regs + SM501_IRQ_MASK);
1291
1292 dramctrl = readl(sm->regs + SM501_DRAM_CONTROL);
1293 mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7];
1294
1295 dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n",
1296 sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq);
1297
1298 sm->rev = devid & SM501_DEVICEID_REVMASK;
1299
1300 sm501_dump_gate(sm);
1301
1302 ret = device_create_file(sm->dev, &dev_attr_dbg_regs);
1303 if (ret)
1304 dev_err(sm->dev, "failed to create debug regs file\n");
1305
1306 sm501_dump_clk(sm);
1307
1308 /* check to see if we have some device initialisation */
1309
1310 pdata = sm->platdata;
1311 idata = pdata ? pdata->init : NULL;
1312
1313 if (idata) {
1314 sm501_init_regs(sm, idata);
1315
1316 if (idata->devices & SM501_USE_USB_HOST)
1317 sm501_register_usbhost(sm, &mem_avail);
1318 if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1))
1319 sm501_register_uart(sm, idata->devices);
1320 if (idata->devices & SM501_USE_GPIO)
1321 sm501_register_gpio(sm);
1322 }
1323
1324 if (pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
1325 if (!sm->gpio.registered)
1326 dev_err(sm->dev, "no gpio registered for i2c gpio.\n");
1327 else
1328 sm501_register_gpio_i2c(sm, pdata);
1329 }
1330
1331 ret = sm501_check_clocks(sm);
1332 if (ret) {
1333 dev_err(sm->dev, "M1X and M clocks sourced from different "
1334 "PLLs\n");
1335 return -EINVAL;
1336 }
1337
1338 /* always create a framebuffer */
1339 sm501_register_display(sm, &mem_avail);
1340
1341 return 0;
1342 }
1343
1344 static int sm501_plat_probe(struct platform_device *dev)
1345 {
1346 struct sm501_devdata *sm;
1347 int err;
1348
1349 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1350 if (sm == NULL) {
1351 dev_err(&dev->dev, "no memory for device data\n");
1352 err = -ENOMEM;
1353 goto err1;
1354 }
1355
1356 sm->dev = &dev->dev;
1357 sm->pdev_id = dev->id;
1358 sm->irq = platform_get_irq(dev, 0);
1359 sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1360 sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1361 sm->platdata = dev->dev.platform_data;
1362
1363 if (sm->irq < 0) {
1364 dev_err(&dev->dev, "failed to get irq resource\n");
1365 err = sm->irq;
1366 goto err_res;
1367 }
1368
1369 if (sm->io_res == NULL || sm->mem_res == NULL) {
1370 dev_err(&dev->dev, "failed to get IO resource\n");
1371 err = -ENOENT;
1372 goto err_res;
1373 }
1374
1375 sm->regs_claim = request_mem_region(sm->io_res->start,
1376 0x100, "sm501");
1377
1378 if (sm->regs_claim == NULL) {
1379 dev_err(&dev->dev, "cannot claim registers\n");
1380 err= -EBUSY;
1381 goto err_res;
1382 }
1383
1384 platform_set_drvdata(dev, sm);
1385
1386 sm->regs = ioremap(sm->io_res->start,
1387 (sm->io_res->end - sm->io_res->start) - 1);
1388
1389 if (sm->regs == NULL) {
1390 dev_err(&dev->dev, "cannot remap registers\n");
1391 err = -EIO;
1392 goto err_claim;
1393 }
1394
1395 return sm501_init_dev(sm);
1396
1397 err_claim:
1398 release_resource(sm->regs_claim);
1399 kfree(sm->regs_claim);
1400 err_res:
1401 kfree(sm);
1402 err1:
1403 return err;
1404
1405 }
1406
1407 #ifdef CONFIG_PM
1408
1409 /* power management support */
1410
1411 static void sm501_set_power(struct sm501_devdata *sm, int on)
1412 {
1413 struct sm501_platdata *pd = sm->platdata;
1414
1415 if (pd == NULL)
1416 return;
1417
1418 if (pd->get_power) {
1419 if (pd->get_power(sm->dev) == on) {
1420 dev_dbg(sm->dev, "is already %d\n", on);
1421 return;
1422 }
1423 }
1424
1425 if (pd->set_power) {
1426 dev_dbg(sm->dev, "setting power to %d\n", on);
1427
1428 pd->set_power(sm->dev, on);
1429 sm501_mdelay(sm, 10);
1430 }
1431 }
1432
1433 static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
1434 {
1435 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1436
1437 sm->in_suspend = 1;
1438 sm->pm_misc = readl(sm->regs + SM501_MISC_CONTROL);
1439
1440 sm501_dump_regs(sm);
1441
1442 if (sm->platdata) {
1443 if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF)
1444 sm501_set_power(sm, 0);
1445 }
1446
1447 return 0;
1448 }
1449
1450 static int sm501_plat_resume(struct platform_device *pdev)
1451 {
1452 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1453
1454 sm501_set_power(sm, 1);
1455
1456 sm501_dump_regs(sm);
1457 sm501_dump_gate(sm);
1458 sm501_dump_clk(sm);
1459
1460 /* check to see if we are in the same state as when suspended */
1461
1462 if (readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) {
1463 dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n");
1464 writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL);
1465
1466 /* our suspend causes the controller state to change,
1467 * either by something attempting setup, power loss,
1468 * or an external reset event on power change */
1469
1470 if (sm->platdata && sm->platdata->init) {
1471 sm501_init_regs(sm, sm->platdata->init);
1472 }
1473 }
1474
1475 /* dump our state from resume */
1476
1477 sm501_dump_regs(sm);
1478 sm501_dump_clk(sm);
1479
1480 sm->in_suspend = 0;
1481
1482 return 0;
1483 }
1484 #else
1485 #define sm501_plat_suspend NULL
1486 #define sm501_plat_resume NULL
1487 #endif
1488
1489 /* Initialisation data for PCI devices */
1490
1491 static struct sm501_initdata sm501_pci_initdata = {
1492 .gpio_high = {
1493 .set = 0x3F000000, /* 24bit panel */
1494 .mask = 0x0,
1495 },
1496 .misc_timing = {
1497 .set = 0x010100, /* SDRAM timing */
1498 .mask = 0x1F1F00,
1499 },
1500 .misc_control = {
1501 .set = SM501_MISC_PNL_24BIT,
1502 .mask = 0,
1503 },
1504
1505 .devices = SM501_USE_ALL,
1506
1507 /* Errata AB-3 says that 72MHz is the fastest available
1508 * for 33MHZ PCI with proper bus-mastering operation */
1509
1510 .mclk = 72 * MHZ,
1511 .m1xclk = 144 * MHZ,
1512 };
1513
1514 static struct sm501_platdata_fbsub sm501_pdata_fbsub = {
1515 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1516 SM501FB_FLAG_USE_HWCURSOR |
1517 SM501FB_FLAG_USE_HWACCEL |
1518 SM501FB_FLAG_DISABLE_AT_EXIT),
1519 };
1520
1521 static struct sm501_platdata_fb sm501_fb_pdata = {
1522 .fb_route = SM501_FB_OWN,
1523 .fb_crt = &sm501_pdata_fbsub,
1524 .fb_pnl = &sm501_pdata_fbsub,
1525 };
1526
1527 static struct sm501_platdata sm501_pci_platdata = {
1528 .init = &sm501_pci_initdata,
1529 .fb = &sm501_fb_pdata,
1530 .gpio_base = -1,
1531 };
1532
1533 static int sm501_pci_probe(struct pci_dev *dev,
1534 const struct pci_device_id *id)
1535 {
1536 struct sm501_devdata *sm;
1537 int err;
1538
1539 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1540 if (sm == NULL) {
1541 dev_err(&dev->dev, "no memory for device data\n");
1542 err = -ENOMEM;
1543 goto err1;
1544 }
1545
1546 /* set a default set of platform data */
1547 dev->dev.platform_data = sm->platdata = &sm501_pci_platdata;
1548
1549 /* set a hopefully unique id for our child platform devices */
1550 sm->pdev_id = 32 + dev->devfn;
1551
1552 pci_set_drvdata(dev, sm);
1553
1554 err = pci_enable_device(dev);
1555 if (err) {
1556 dev_err(&dev->dev, "cannot enable device\n");
1557 goto err2;
1558 }
1559
1560 sm->dev = &dev->dev;
1561 sm->irq = dev->irq;
1562
1563 #ifdef __BIG_ENDIAN
1564 /* if the system is big-endian, we most probably have a
1565 * translation in the IO layer making the PCI bus little endian
1566 * so make the framebuffer swapped pixels */
1567
1568 sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN;
1569 #endif
1570
1571 /* check our resources */
1572
1573 if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) {
1574 dev_err(&dev->dev, "region #0 is not memory?\n");
1575 err = -EINVAL;
1576 goto err3;
1577 }
1578
1579 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) {
1580 dev_err(&dev->dev, "region #1 is not memory?\n");
1581 err = -EINVAL;
1582 goto err3;
1583 }
1584
1585 /* make our resources ready for sharing */
1586
1587 sm->io_res = &dev->resource[1];
1588 sm->mem_res = &dev->resource[0];
1589
1590 sm->regs_claim = request_mem_region(sm->io_res->start,
1591 0x100, "sm501");
1592 if (sm->regs_claim == NULL) {
1593 dev_err(&dev->dev, "cannot claim registers\n");
1594 err= -EBUSY;
1595 goto err3;
1596 }
1597
1598 sm->regs = ioremap(pci_resource_start(dev, 1),
1599 pci_resource_len(dev, 1));
1600
1601 if (sm->regs == NULL) {
1602 dev_err(&dev->dev, "cannot remap registers\n");
1603 err = -EIO;
1604 goto err4;
1605 }
1606
1607 sm501_init_dev(sm);
1608 return 0;
1609
1610 err4:
1611 release_resource(sm->regs_claim);
1612 kfree(sm->regs_claim);
1613 err3:
1614 pci_disable_device(dev);
1615 err2:
1616 pci_set_drvdata(dev, NULL);
1617 kfree(sm);
1618 err1:
1619 return err;
1620 }
1621
1622 static void sm501_remove_sub(struct sm501_devdata *sm,
1623 struct sm501_device *smdev)
1624 {
1625 list_del(&smdev->list);
1626 platform_device_unregister(&smdev->pdev);
1627 }
1628
1629 static void sm501_dev_remove(struct sm501_devdata *sm)
1630 {
1631 struct sm501_device *smdev, *tmp;
1632
1633 list_for_each_entry_safe(smdev, tmp, &sm->devices, list)
1634 sm501_remove_sub(sm, smdev);
1635
1636 device_remove_file(sm->dev, &dev_attr_dbg_regs);
1637
1638 if (sm->gpio.registered)
1639 sm501_gpio_remove(sm);
1640 }
1641
1642 static void sm501_pci_remove(struct pci_dev *dev)
1643 {
1644 struct sm501_devdata *sm = pci_get_drvdata(dev);
1645
1646 sm501_dev_remove(sm);
1647 iounmap(sm->regs);
1648
1649 release_resource(sm->regs_claim);
1650 kfree(sm->regs_claim);
1651
1652 pci_set_drvdata(dev, NULL);
1653 pci_disable_device(dev);
1654 }
1655
1656 static int sm501_plat_remove(struct platform_device *dev)
1657 {
1658 struct sm501_devdata *sm = platform_get_drvdata(dev);
1659
1660 sm501_dev_remove(sm);
1661 iounmap(sm->regs);
1662
1663 release_resource(sm->regs_claim);
1664 kfree(sm->regs_claim);
1665
1666 return 0;
1667 }
1668
1669 static struct pci_device_id sm501_pci_tbl[] = {
1670 { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1671 { 0, },
1672 };
1673
1674 MODULE_DEVICE_TABLE(pci, sm501_pci_tbl);
1675
1676 static struct pci_driver sm501_pci_drv = {
1677 .name = "sm501",
1678 .id_table = sm501_pci_tbl,
1679 .probe = sm501_pci_probe,
1680 .remove = sm501_pci_remove,
1681 };
1682
1683 MODULE_ALIAS("platform:sm501");
1684
1685 static struct platform_driver sm501_plat_drv = {
1686 .driver = {
1687 .name = "sm501",
1688 .owner = THIS_MODULE,
1689 },
1690 .probe = sm501_plat_probe,
1691 .remove = sm501_plat_remove,
1692 .suspend = sm501_plat_suspend,
1693 .resume = sm501_plat_resume,
1694 };
1695
1696 static int __init sm501_base_init(void)
1697 {
1698 platform_driver_register(&sm501_plat_drv);
1699 return pci_register_driver(&sm501_pci_drv);
1700 }
1701
1702 static void __exit sm501_base_exit(void)
1703 {
1704 platform_driver_unregister(&sm501_plat_drv);
1705 pci_unregister_driver(&sm501_pci_drv);
1706 }
1707
1708 module_init(sm501_base_init);
1709 module_exit(sm501_base_exit);
1710
1711 MODULE_DESCRIPTION("SM501 Core Driver");
1712 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders");
1713 MODULE_LICENSE("GPL v2");
Support for the Chinese Samsung S3C2440 based development boards