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mm: fix dubious code in __count_immobile_pages()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / mfd / sm501.c
blob5de3a760ea1ef946075c1de485a645bb8121ae0d
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/i2c-gpio.h>
23 #include <linux/slab.h>
24
25 #include <linux/sm501.h>
26 #include <linux/sm501-regs.h>
27 #include <linux/serial_8250.h>
28
29 #include <linux/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 #ifdef CONFIG_MFD_SM501_GPIO
39 #include <linux/gpio.h>
40
41 struct sm501_gpio_chip {
42 struct gpio_chip gpio;
43 struct sm501_gpio *ourgpio; /* to get back to parent. */
44 void __iomem *regbase;
45 void __iomem *control; /* address of control reg. */
46 };
47
48 struct sm501_gpio {
49 struct sm501_gpio_chip low;
50 struct sm501_gpio_chip high;
51 spinlock_t lock;
52
53 unsigned int registered : 1;
54 void __iomem *regs;
55 struct resource *regs_res;
56 };
57 #else
58 struct sm501_gpio {
59 /* no gpio support, empty definition for sm501_devdata. */
60 };
61 #endif
62
63 struct sm501_devdata {
64 spinlock_t reg_lock;
65 struct mutex clock_lock;
66 struct list_head devices;
67 struct sm501_gpio gpio;
68
69 struct device *dev;
70 struct resource *io_res;
71 struct resource *mem_res;
72 struct resource *regs_claim;
73 struct sm501_platdata *platdata;
74
75
76 unsigned int in_suspend;
77 unsigned long pm_misc;
78
79 int unit_power[20];
80 unsigned int pdev_id;
81 unsigned int irq;
82 void __iomem *regs;
83 unsigned int rev;
84 };
85
86
87 #define MHZ (1000 * 1000)
88
89 #ifdef DEBUG
90 static const unsigned int div_tab[] = {
91 [0] = 1,
92 [1] = 2,
93 [2] = 4,
94 [3] = 8,
95 [4] = 16,
96 [5] = 32,
97 [6] = 64,
98 [7] = 128,
99 [8] = 3,
100 [9] = 6,
101 [10] = 12,
102 [11] = 24,
103 [12] = 48,
104 [13] = 96,
105 [14] = 192,
106 [15] = 384,
107 [16] = 5,
108 [17] = 10,
109 [18] = 20,
110 [19] = 40,
111 [20] = 80,
112 [21] = 160,
113 [22] = 320,
114 [23] = 604,
115 };
116
117 static unsigned long decode_div(unsigned long pll2, unsigned long val,
118 unsigned int lshft, unsigned int selbit,
119 unsigned long mask)
120 {
121 if (val & selbit)
122 pll2 = 288 * MHZ;
123
124 return pll2 / div_tab[(val >> lshft) & mask];
125 }
126
127 #define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
128
129 /* sm501_dump_clk
130 *
131 * Print out the current clock configuration for the device
132 */
133
134 static void sm501_dump_clk(struct sm501_devdata *sm)
135 {
136 unsigned long misct = readl(sm->regs + SM501_MISC_TIMING);
137 unsigned long pm0 = readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
138 unsigned long pm1 = readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
139 unsigned long pmc = readl(sm->regs + SM501_POWER_MODE_CONTROL);
140 unsigned long sdclk0, sdclk1;
141 unsigned long pll2 = 0;
142
143 switch (misct & 0x30) {
144 case 0x00:
145 pll2 = 336 * MHZ;
146 break;
147 case 0x10:
148 pll2 = 288 * MHZ;
149 break;
150 case 0x20:
151 pll2 = 240 * MHZ;
152 break;
153 case 0x30:
154 pll2 = 192 * MHZ;
155 break;
156 }
157
158 sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ;
159 sdclk0 /= div_tab[((misct >> 8) & 0xf)];
160
161 sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ;
162 sdclk1 /= div_tab[((misct >> 16) & 0xf)];
163
164 dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n",
165 misct, pm0, pm1);
166
167 dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n",
168 fmt_freq(pll2), sdclk0, sdclk1);
169
170 dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1);
171
172 dev_dbg(sm->dev, "PM0[%c]: "
173 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
174 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
175 (pmc & 3 ) == 0 ? '*' : '-',
176 fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)),
177 fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)),
178 fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)),
179 fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15)));
180
181 dev_dbg(sm->dev, "PM1[%c]: "
182 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
183 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
184 (pmc & 3 ) == 1 ? '*' : '-',
185 fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)),
186 fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)),
187 fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)),
188 fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15)));
189 }
190
191 static void sm501_dump_regs(struct sm501_devdata *sm)
192 {
193 void __iomem *regs = sm->regs;
194
195 dev_info(sm->dev, "System Control %08x\n",
196 readl(regs + SM501_SYSTEM_CONTROL));
197 dev_info(sm->dev, "Misc Control %08x\n",
198 readl(regs + SM501_MISC_CONTROL));
199 dev_info(sm->dev, "GPIO Control Low %08x\n",
200 readl(regs + SM501_GPIO31_0_CONTROL));
201 dev_info(sm->dev, "GPIO Control Hi %08x\n",
202 readl(regs + SM501_GPIO63_32_CONTROL));
203 dev_info(sm->dev, "DRAM Control %08x\n",
204 readl(regs + SM501_DRAM_CONTROL));
205 dev_info(sm->dev, "Arbitration Ctrl %08x\n",
206 readl(regs + SM501_ARBTRTN_CONTROL));
207 dev_info(sm->dev, "Misc Timing %08x\n",
208 readl(regs + SM501_MISC_TIMING));
209 }
210
211 static void sm501_dump_gate(struct sm501_devdata *sm)
212 {
213 dev_info(sm->dev, "CurrentGate %08x\n",
214 readl(sm->regs + SM501_CURRENT_GATE));
215 dev_info(sm->dev, "CurrentClock %08x\n",
216 readl(sm->regs + SM501_CURRENT_CLOCK));
217 dev_info(sm->dev, "PowerModeControl %08x\n",
218 readl(sm->regs + SM501_POWER_MODE_CONTROL));
219 }
220
221 #else
222 static inline void sm501_dump_gate(struct sm501_devdata *sm) { }
223 static inline void sm501_dump_regs(struct sm501_devdata *sm) { }
224 static inline void sm501_dump_clk(struct sm501_devdata *sm) { }
225 #endif
226
227 /* sm501_sync_regs
228 *
229 * ensure the
230 */
231
232 static void sm501_sync_regs(struct sm501_devdata *sm)
233 {
234 readl(sm->regs);
235 }
236
237 static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay)
238 {
239 /* during suspend/resume, we are currently not allowed to sleep,
240 * so change to using mdelay() instead of msleep() if we
241 * are in one of these paths */
242
243 if (sm->in_suspend)
244 mdelay(delay);
245 else
246 msleep(delay);
247 }
248
249 /* sm501_misc_control
250 *
251 * alters the miscellaneous control parameters
252 */
253
254 int sm501_misc_control(struct device *dev,
255 unsigned long set, unsigned long clear)
256 {
257 struct sm501_devdata *sm = dev_get_drvdata(dev);
258 unsigned long misc;
259 unsigned long save;
260 unsigned long to;
261
262 spin_lock_irqsave(&sm->reg_lock, save);
263
264 misc = readl(sm->regs + SM501_MISC_CONTROL);
265 to = (misc & ~clear) | set;
266
267 if (to != misc) {
268 writel(to, sm->regs + SM501_MISC_CONTROL);
269 sm501_sync_regs(sm);
270
271 dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc);
272 }
273
274 spin_unlock_irqrestore(&sm->reg_lock, save);
275 return to;
276 }
277
278 EXPORT_SYMBOL_GPL(sm501_misc_control);
279
280 /* sm501_modify_reg
281 *
282 * Modify a register in the SM501 which may be shared with other
283 * drivers.
284 */
285
286 unsigned long sm501_modify_reg(struct device *dev,
287 unsigned long reg,
288 unsigned long set,
289 unsigned long clear)
290 {
291 struct sm501_devdata *sm = dev_get_drvdata(dev);
292 unsigned long data;
293 unsigned long save;
294
295 spin_lock_irqsave(&sm->reg_lock, save);
296
297 data = readl(sm->regs + reg);
298 data |= set;
299 data &= ~clear;
300
301 writel(data, sm->regs + reg);
302 sm501_sync_regs(sm);
303
304 spin_unlock_irqrestore(&sm->reg_lock, save);
305
306 return data;
307 }
308
309 EXPORT_SYMBOL_GPL(sm501_modify_reg);
310
311 /* sm501_unit_power
312 *
313 * alters the power active gate to set specific units on or off
314 */
315
316 int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
317 {
318 struct sm501_devdata *sm = dev_get_drvdata(dev);
319 unsigned long mode;
320 unsigned long gate;
321 unsigned long clock;
322
323 mutex_lock(&sm->clock_lock);
324
325 mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
326 gate = readl(sm->regs + SM501_CURRENT_GATE);
327 clock = readl(sm->regs + SM501_CURRENT_CLOCK);
328
329 mode &= 3; /* get current power mode */
330
331 if (unit >= ARRAY_SIZE(sm->unit_power)) {
332 dev_err(dev, "%s: bad unit %d\n", __func__, unit);
333 goto already;
334 }
335
336 dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit,
337 sm->unit_power[unit], to);
338
339 if (to == 0 && sm->unit_power[unit] == 0) {
340 dev_err(sm->dev, "unit %d is already shutdown\n", unit);
341 goto already;
342 }
343
344 sm->unit_power[unit] += to ? 1 : -1;
345 to = sm->unit_power[unit] ? 1 : 0;
346
347 if (to) {
348 if (gate & (1 << unit))
349 goto already;
350 gate |= (1 << unit);
351 } else {
352 if (!(gate & (1 << unit)))
353 goto already;
354 gate &= ~(1 << unit);
355 }
356
357 switch (mode) {
358 case 1:
359 writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
360 writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
361 mode = 0;
362 break;
363 case 2:
364 case 0:
365 writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
366 writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
367 mode = 1;
368 break;
369
370 default:
371 gate = -1;
372 goto already;
373 }
374
375 writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
376 sm501_sync_regs(sm);
377
378 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
379 gate, clock, mode);
380
381 sm501_mdelay(sm, 16);
382
383 already:
384 mutex_unlock(&sm->clock_lock);
385 return gate;
386 }
387
388 EXPORT_SYMBOL_GPL(sm501_unit_power);
389
390
391 /* Perform a rounded division. */
392 static long sm501fb_round_div(long num, long denom)
393 {
394 /* n / d + 1 / 2 = (2n + d) / 2d */
395 return (2 * num + denom) / (2 * denom);
396 }
397
398 /* clock value structure. */
399 struct sm501_clock {
400 unsigned long mclk;
401 int divider;
402 int shift;
403 unsigned int m, n, k;
404 };
405
406 /* sm501_calc_clock
407 *
408 * Calculates the nearest discrete clock frequency that
409 * can be achieved with the specified input clock.
410 * the maximum divisor is 3 or 5
411 */
412
413 static int sm501_calc_clock(unsigned long freq,
414 struct sm501_clock *clock,
415 int max_div,
416 unsigned long mclk,
417 long *best_diff)
418 {
419 int ret = 0;
420 int divider;
421 int shift;
422 long diff;
423
424 /* try dividers 1 and 3 for CRT and for panel,
425 try divider 5 for panel only.*/
426
427 for (divider = 1; divider <= max_div; divider += 2) {
428 /* try all 8 shift values.*/
429 for (shift = 0; shift < 8; shift++) {
430 /* Calculate difference to requested clock */
431 diff = sm501fb_round_div(mclk, divider << shift) - freq;
432 if (diff < 0)
433 diff = -diff;
434
435 /* If it is less than the current, use it */
436 if (diff < *best_diff) {
437 *best_diff = diff;
438
439 clock->mclk = mclk;
440 clock->divider = divider;
441 clock->shift = shift;
442 ret = 1;
443 }
444 }
445 }
446
447 return ret;
448 }
449
450 /* sm501_calc_pll
451 *
452 * Calculates the nearest discrete clock frequency that can be
453 * achieved using the programmable PLL.
454 * the maximum divisor is 3 or 5
455 */
456
457 static unsigned long sm501_calc_pll(unsigned long freq,
458 struct sm501_clock *clock,
459 int max_div)
460 {
461 unsigned long mclk;
462 unsigned int m, n, k;
463 long best_diff = 999999999;
464
465 /*
466 * The SM502 datasheet doesn't specify the min/max values for M and N.
467 * N = 1 at least doesn't work in practice.
468 */
469 for (m = 2; m <= 255; m++) {
470 for (n = 2; n <= 127; n++) {
471 for (k = 0; k <= 1; k++) {
472 mclk = (24000000UL * m / n) >> k;
473
474 if (sm501_calc_clock(freq, clock, max_div,
475 mclk, &best_diff)) {
476 clock->m = m;
477 clock->n = n;
478 clock->k = k;
479 }
480 }
481 }
482 }
483
484 /* Return best clock. */
485 return clock->mclk / (clock->divider << clock->shift);
486 }
487
488 /* sm501_select_clock
489 *
490 * Calculates the nearest discrete clock frequency that can be
491 * achieved using the 288MHz and 336MHz PLLs.
492 * the maximum divisor is 3 or 5
493 */
494
495 static unsigned long sm501_select_clock(unsigned long freq,
496 struct sm501_clock *clock,
497 int max_div)
498 {
499 unsigned long mclk;
500 long best_diff = 999999999;
501
502 /* Try 288MHz and 336MHz clocks. */
503 for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) {
504 sm501_calc_clock(freq, clock, max_div, mclk, &best_diff);
505 }
506
507 /* Return best clock. */
508 return clock->mclk / (clock->divider << clock->shift);
509 }
510
511 /* sm501_set_clock
512 *
513 * set one of the four clock sources to the closest available frequency to
514 * the one specified
515 */
516
517 unsigned long sm501_set_clock(struct device *dev,
518 int clksrc,
519 unsigned long req_freq)
520 {
521 struct sm501_devdata *sm = dev_get_drvdata(dev);
522 unsigned long mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
523 unsigned long gate = readl(sm->regs + SM501_CURRENT_GATE);
524 unsigned long clock = readl(sm->regs + SM501_CURRENT_CLOCK);
525 unsigned char reg;
526 unsigned int pll_reg = 0;
527 unsigned long sm501_freq; /* the actual frequency achieved */
528
529 struct sm501_clock to;
530
531 /* find achivable discrete frequency and setup register value
532 * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK
533 * has an extra bit for the divider */
534
535 switch (clksrc) {
536 case SM501_CLOCK_P2XCLK:
537 /* This clock is divided in half so to achieve the
538 * requested frequency the value must be multiplied by
539 * 2. This clock also has an additional pre divisor */
540
541 if (sm->rev >= 0xC0) {
542 /* SM502 -> use the programmable PLL */
543 sm501_freq = (sm501_calc_pll(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 reg |= 0x40; /* select the programmable PLL */
551 pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m;
552 } else {
553 sm501_freq = (sm501_select_clock(2 * req_freq,
554 &to, 5) / 2);
555 reg = to.shift & 0x07;/* bottom 3 bits are shift */
556 if (to.divider == 3)
557 reg |= 0x08; /* /3 divider required */
558 else if (to.divider == 5)
559 reg |= 0x10; /* /5 divider required */
560 if (to.mclk != 288000000)
561 reg |= 0x20; /* which mclk pll is source */
562 }
563 break;
564
565 case SM501_CLOCK_V2XCLK:
566 /* This clock is divided in half so to achieve the
567 * requested frequency the value must be multiplied by 2. */
568
569 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
570 reg=to.shift & 0x07; /* bottom 3 bits are shift */
571 if (to.divider == 3)
572 reg |= 0x08; /* /3 divider required */
573 if (to.mclk != 288000000)
574 reg |= 0x10; /* which mclk pll is source */
575 break;
576
577 case SM501_CLOCK_MCLK:
578 case SM501_CLOCK_M1XCLK:
579 /* These clocks are the same and not further divided */
580
581 sm501_freq = sm501_select_clock( req_freq, &to, 3);
582 reg=to.shift & 0x07; /* bottom 3 bits are shift */
583 if (to.divider == 3)
584 reg |= 0x08; /* /3 divider required */
585 if (to.mclk != 288000000)
586 reg |= 0x10; /* which mclk pll is source */
587 break;
588
589 default:
590 return 0; /* this is bad */
591 }
592
593 mutex_lock(&sm->clock_lock);
594
595 mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
596 gate = readl(sm->regs + SM501_CURRENT_GATE);
597 clock = readl(sm->regs + SM501_CURRENT_CLOCK);
598
599 clock = clock & ~(0xFF << clksrc);
600 clock |= reg<<clksrc;
601
602 mode &= 3; /* find current mode */
603
604 switch (mode) {
605 case 1:
606 writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
607 writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
608 mode = 0;
609 break;
610 case 2:
611 case 0:
612 writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
613 writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
614 mode = 1;
615 break;
616
617 default:
618 mutex_unlock(&sm->clock_lock);
619 return -1;
620 }
621
622 writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
623
624 if (pll_reg)
625 writel(pll_reg, sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
626
627 sm501_sync_regs(sm);
628
629 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
630 gate, clock, mode);
631
632 sm501_mdelay(sm, 16);
633 mutex_unlock(&sm->clock_lock);
634
635 sm501_dump_clk(sm);
636
637 return sm501_freq;
638 }
639
640 EXPORT_SYMBOL_GPL(sm501_set_clock);
641
642 /* sm501_find_clock
643 *
644 * finds the closest available frequency for a given clock
645 */
646
647 unsigned long sm501_find_clock(struct device *dev,
648 int clksrc,
649 unsigned long req_freq)
650 {
651 struct sm501_devdata *sm = dev_get_drvdata(dev);
652 unsigned long sm501_freq; /* the frequency achieveable by the 501 */
653 struct sm501_clock to;
654
655 switch (clksrc) {
656 case SM501_CLOCK_P2XCLK:
657 if (sm->rev >= 0xC0) {
658 /* SM502 -> use the programmable PLL */
659 sm501_freq = (sm501_calc_pll(2 * req_freq,
660 &to, 5) / 2);
661 } else {
662 sm501_freq = (sm501_select_clock(2 * req_freq,
663 &to, 5) / 2);
664 }
665 break;
666
667 case SM501_CLOCK_V2XCLK:
668 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
669 break;
670
671 case SM501_CLOCK_MCLK:
672 case SM501_CLOCK_M1XCLK:
673 sm501_freq = sm501_select_clock(req_freq, &to, 3);
674 break;
675
676 default:
677 sm501_freq = 0; /* error */
678 }
679
680 return sm501_freq;
681 }
682
683 EXPORT_SYMBOL_GPL(sm501_find_clock);
684
685 static struct sm501_device *to_sm_device(struct platform_device *pdev)
686 {
687 return container_of(pdev, struct sm501_device, pdev);
688 }
689
690 /* sm501_device_release
691 *
692 * A release function for the platform devices we create to allow us to
693 * free any items we allocated
694 */
695
696 static void sm501_device_release(struct device *dev)
697 {
698 kfree(to_sm_device(to_platform_device(dev)));
699 }
700
701 /* sm501_create_subdev
702 *
703 * Create a skeleton platform device with resources for passing to a
704 * sub-driver
705 */
706
707 static struct platform_device *
708 sm501_create_subdev(struct sm501_devdata *sm, char *name,
709 unsigned int res_count, unsigned int platform_data_size)
710 {
711 struct sm501_device *smdev;
712
713 smdev = kzalloc(sizeof(struct sm501_device) +
714 (sizeof(struct resource) * res_count) +
715 platform_data_size, GFP_KERNEL);
716 if (!smdev)
717 return NULL;
718
719 smdev->pdev.dev.release = sm501_device_release;
720
721 smdev->pdev.name = name;
722 smdev->pdev.id = sm->pdev_id;
723 smdev->pdev.dev.parent = sm->dev;
724
725 if (res_count) {
726 smdev->pdev.resource = (struct resource *)(smdev+1);
727 smdev->pdev.num_resources = res_count;
728 }
729 if (platform_data_size)
730 smdev->pdev.dev.platform_data = (void *)(smdev+1);
731
732 return &smdev->pdev;
733 }
734
735 /* sm501_register_device
736 *
737 * Register a platform device created with sm501_create_subdev()
738 */
739
740 static int sm501_register_device(struct sm501_devdata *sm,
741 struct platform_device *pdev)
742 {
743 struct sm501_device *smdev = to_sm_device(pdev);
744 int ptr;
745 int ret;
746
747 for (ptr = 0; ptr < pdev->num_resources; ptr++) {
748 printk(KERN_DEBUG "%s[%d] %pR\n",
749 pdev->name, ptr, &pdev->resource[ptr]);
750 }
751
752 ret = platform_device_register(pdev);
753
754 if (ret >= 0) {
755 dev_dbg(sm->dev, "registered %s\n", pdev->name);
756 list_add_tail(&smdev->list, &sm->devices);
757 } else
758 dev_err(sm->dev, "error registering %s (%d)\n",
759 pdev->name, ret);
760
761 return ret;
762 }
763
764 /* sm501_create_subio
765 *
766 * Fill in an IO resource for a sub device
767 */
768
769 static void sm501_create_subio(struct sm501_devdata *sm,
770 struct resource *res,
771 resource_size_t offs,
772 resource_size_t size)
773 {
774 res->flags = IORESOURCE_MEM;
775 res->parent = sm->io_res;
776 res->start = sm->io_res->start + offs;
777 res->end = res->start + size - 1;
778 }
779
780 /* sm501_create_mem
781 *
782 * Fill in an MEM resource for a sub device
783 */
784
785 static void sm501_create_mem(struct sm501_devdata *sm,
786 struct resource *res,
787 resource_size_t *offs,
788 resource_size_t size)
789 {
790 *offs -= size; /* adjust memory size */
791
792 res->flags = IORESOURCE_MEM;
793 res->parent = sm->mem_res;
794 res->start = sm->mem_res->start + *offs;
795 res->end = res->start + size - 1;
796 }
797
798 /* sm501_create_irq
799 *
800 * Fill in an IRQ resource for a sub device
801 */
802
803 static void sm501_create_irq(struct sm501_devdata *sm,
804 struct resource *res)
805 {
806 res->flags = IORESOURCE_IRQ;
807 res->parent = NULL;
808 res->start = res->end = sm->irq;
809 }
810
811 static int sm501_register_usbhost(struct sm501_devdata *sm,
812 resource_size_t *mem_avail)
813 {
814 struct platform_device *pdev;
815
816 pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0);
817 if (!pdev)
818 return -ENOMEM;
819
820 sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000);
821 sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024);
822 sm501_create_irq(sm, &pdev->resource[2]);
823
824 return sm501_register_device(sm, pdev);
825 }
826
827 static void sm501_setup_uart_data(struct sm501_devdata *sm,
828 struct plat_serial8250_port *uart_data,
829 unsigned int offset)
830 {
831 uart_data->membase = sm->regs + offset;
832 uart_data->mapbase = sm->io_res->start + offset;
833 uart_data->iotype = UPIO_MEM;
834 uart_data->irq = sm->irq;
835 uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ;
836 uart_data->regshift = 2;
837 uart_data->uartclk = (9600 * 16);
838 }
839
840 static int sm501_register_uart(struct sm501_devdata *sm, int devices)
841 {
842 struct platform_device *pdev;
843 struct plat_serial8250_port *uart_data;
844
845 pdev = sm501_create_subdev(sm, "serial8250", 0,
846 sizeof(struct plat_serial8250_port) * 3);
847 if (!pdev)
848 return -ENOMEM;
849
850 uart_data = pdev->dev.platform_data;
851
852 if (devices & SM501_USE_UART0) {
853 sm501_setup_uart_data(sm, uart_data++, 0x30000);
854 sm501_unit_power(sm->dev, SM501_GATE_UART0, 1);
855 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0);
856 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0);
857 }
858 if (devices & SM501_USE_UART1) {
859 sm501_setup_uart_data(sm, uart_data++, 0x30020);
860 sm501_unit_power(sm->dev, SM501_GATE_UART1, 1);
861 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0);
862 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0);
863 }
864
865 pdev->id = PLAT8250_DEV_SM501;
866
867 return sm501_register_device(sm, pdev);
868 }
869
870 static int sm501_register_display(struct sm501_devdata *sm,
871 resource_size_t *mem_avail)
872 {
873 struct platform_device *pdev;
874
875 pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0);
876 if (!pdev)
877 return -ENOMEM;
878
879 sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000);
880 sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000);
881 sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail);
882 sm501_create_irq(sm, &pdev->resource[3]);
883
884 return sm501_register_device(sm, pdev);
885 }
886
887 #ifdef CONFIG_MFD_SM501_GPIO
888
889 static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc)
890 {
891 return container_of(gc, struct sm501_gpio_chip, gpio);
892 }
893
894 static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio)
895 {
896 return container_of(gpio, struct sm501_devdata, gpio);
897 }
898
899 static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset)
900
901 {
902 struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip);
903 unsigned long result;
904
905 result = readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
906 result >>= offset;
907
908 return result & 1UL;
909 }
910
911 static void sm501_gpio_ensure_gpio(struct sm501_gpio_chip *smchip,
912 unsigned long bit)
913 {
914 unsigned long ctrl;
915
916 /* check and modify if this pin is not set as gpio. */
917
918 if (readl(smchip->control) & bit) {
919 dev_info(sm501_gpio_to_dev(smchip->ourgpio)->dev,
920 "changing mode of gpio, bit %08lx\n", bit);
921
922 ctrl = readl(smchip->control);
923 ctrl &= ~bit;
924 writel(ctrl, smchip->control);
925
926 sm501_sync_regs(sm501_gpio_to_dev(smchip->ourgpio));
927 }
928 }
929
930 static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
931
932 {
933 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
934 struct sm501_gpio *smgpio = smchip->ourgpio;
935 unsigned long bit = 1 << offset;
936 void __iomem *regs = smchip->regbase;
937 unsigned long save;
938 unsigned long val;
939
940 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
941 __func__, chip, offset);
942
943 spin_lock_irqsave(&smgpio->lock, save);
944
945 val = readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
946 if (value)
947 val |= bit;
948 writel(val, regs);
949
950 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
951 sm501_gpio_ensure_gpio(smchip, bit);
952
953 spin_unlock_irqrestore(&smgpio->lock, save);
954 }
955
956 static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
957 {
958 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
959 struct sm501_gpio *smgpio = smchip->ourgpio;
960 void __iomem *regs = smchip->regbase;
961 unsigned long bit = 1 << offset;
962 unsigned long save;
963 unsigned long ddr;
964
965 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
966 __func__, chip, offset);
967
968 spin_lock_irqsave(&smgpio->lock, save);
969
970 ddr = readl(regs + SM501_GPIO_DDR_LOW);
971 writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
972
973 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
974 sm501_gpio_ensure_gpio(smchip, bit);
975
976 spin_unlock_irqrestore(&smgpio->lock, save);
977
978 return 0;
979 }
980
981 static int sm501_gpio_output(struct gpio_chip *chip,
982 unsigned offset, int value)
983 {
984 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
985 struct sm501_gpio *smgpio = smchip->ourgpio;
986 unsigned long bit = 1 << offset;
987 void __iomem *regs = smchip->regbase;
988 unsigned long save;
989 unsigned long val;
990 unsigned long ddr;
991
992 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n",
993 __func__, chip, offset, value);
994
995 spin_lock_irqsave(&smgpio->lock, save);
996
997 val = readl(regs + SM501_GPIO_DATA_LOW);
998 if (value)
999 val |= bit;
1000 else
1001 val &= ~bit;
1002 writel(val, regs);
1003
1004 ddr = readl(regs + SM501_GPIO_DDR_LOW);
1005 writel(ddr | bit, regs + SM501_GPIO_DDR_LOW);
1006
1007 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
1008 writel(val, regs + SM501_GPIO_DATA_LOW);
1009
1010 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
1011 spin_unlock_irqrestore(&smgpio->lock, save);
1012
1013 return 0;
1014 }
1015
1016 static struct gpio_chip gpio_chip_template = {
1017 .ngpio = 32,
1018 .direction_input = sm501_gpio_input,
1019 .direction_output = sm501_gpio_output,
1020 .set = sm501_gpio_set,
1021 .get = sm501_gpio_get,
1022 };
1023
1024 static int __devinit sm501_gpio_register_chip(struct sm501_devdata *sm,
1025 struct sm501_gpio *gpio,
1026 struct sm501_gpio_chip *chip)
1027 {
1028 struct sm501_platdata *pdata = sm->platdata;
1029 struct gpio_chip *gchip = &chip->gpio;
1030 int base = pdata->gpio_base;
1031
1032 chip->gpio = gpio_chip_template;
1033
1034 if (chip == &gpio->high) {
1035 if (base > 0)
1036 base += 32;
1037 chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH;
1038 chip->control = sm->regs + SM501_GPIO63_32_CONTROL;
1039 gchip->label = "SM501-HIGH";
1040 } else {
1041 chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW;
1042 chip->control = sm->regs + SM501_GPIO31_0_CONTROL;
1043 gchip->label = "SM501-LOW";
1044 }
1045
1046 gchip->base = base;
1047 chip->ourgpio = gpio;
1048
1049 return gpiochip_add(gchip);
1050 }
1051
1052 static int __devinit sm501_register_gpio(struct sm501_devdata *sm)
1053 {
1054 struct sm501_gpio *gpio = &sm->gpio;
1055 resource_size_t iobase = sm->io_res->start + SM501_GPIO;
1056 int ret;
1057 int tmp;
1058
1059 dev_dbg(sm->dev, "registering gpio block %08llx\n",
1060 (unsigned long long)iobase);
1061
1062 spin_lock_init(&gpio->lock);
1063
1064 gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio");
1065 if (gpio->regs_res == NULL) {
1066 dev_err(sm->dev, "gpio: failed to request region\n");
1067 return -ENXIO;
1068 }
1069
1070 gpio->regs = ioremap(iobase, 0x20);
1071 if (gpio->regs == NULL) {
1072 dev_err(sm->dev, "gpio: failed to remap registers\n");
1073 ret = -ENXIO;
1074 goto err_claimed;
1075 }
1076
1077 /* Register both our chips. */
1078
1079 ret = sm501_gpio_register_chip(sm, gpio, &gpio->low);
1080 if (ret) {
1081 dev_err(sm->dev, "failed to add low chip\n");
1082 goto err_mapped;
1083 }
1084
1085 ret = sm501_gpio_register_chip(sm, gpio, &gpio->high);
1086 if (ret) {
1087 dev_err(sm->dev, "failed to add high chip\n");
1088 goto err_low_chip;
1089 }
1090
1091 gpio->registered = 1;
1092
1093 return 0;
1094
1095 err_low_chip:
1096 tmp = gpiochip_remove(&gpio->low.gpio);
1097 if (tmp) {
1098 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1099 return ret;
1100 }
1101
1102 err_mapped:
1103 iounmap(gpio->regs);
1104
1105 err_claimed:
1106 release_resource(gpio->regs_res);
1107 kfree(gpio->regs_res);
1108
1109 return ret;
1110 }
1111
1112 static void sm501_gpio_remove(struct sm501_devdata *sm)
1113 {
1114 struct sm501_gpio *gpio = &sm->gpio;
1115 int ret;
1116
1117 if (!sm->gpio.registered)
1118 return;
1119
1120 ret = gpiochip_remove(&gpio->low.gpio);
1121 if (ret)
1122 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1123
1124 ret = gpiochip_remove(&gpio->high.gpio);
1125 if (ret)
1126 dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n");
1127
1128 iounmap(gpio->regs);
1129 release_resource(gpio->regs_res);
1130 kfree(gpio->regs_res);
1131 }
1132
1133 static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
1134 {
1135 struct sm501_gpio *gpio = &sm->gpio;
1136 int base = (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base;
1137
1138 return (pin % 32) + base;
1139 }
1140
1141 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
1142 {
1143 return sm->gpio.registered;
1144 }
1145 #else
1146 static inline int sm501_register_gpio(struct sm501_devdata *sm)
1147 {
1148 return 0;
1149 }
1150
1151 static inline void sm501_gpio_remove(struct sm501_devdata *sm)
1152 {
1153 }
1154
1155 static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
1156 {
1157 return -1;
1158 }
1159
1160 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
1161 {
1162 return 0;
1163 }
1164 #endif
1165
1166 static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
1167 struct sm501_platdata_gpio_i2c *iic)
1168 {
1169 struct i2c_gpio_platform_data *icd;
1170 struct platform_device *pdev;
1171
1172 pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
1173 sizeof(struct i2c_gpio_platform_data));
1174 if (!pdev)
1175 return -ENOMEM;
1176
1177 icd = pdev->dev.platform_data;
1178
1179 /* We keep the pin_sda and pin_scl fields relative in case the
1180 * same platform data is passed to >1 SM501.
1181 */
1182
1183 icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda);
1184 icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl);
1185 icd->timeout = iic->timeout;
1186 icd->udelay = iic->udelay;
1187
1188 /* note, we can't use either of the pin numbers, as the i2c-gpio
1189 * driver uses the platform.id field to generate the bus number
1190 * to register with the i2c core; The i2c core doesn't have enough
1191 * entries to deal with anything we currently use.
1192 */
1193
1194 pdev->id = iic->bus_num;
1195
1196 dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n",
1197 iic->bus_num,
1198 icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl);
1199
1200 return sm501_register_device(sm, pdev);
1201 }
1202
1203 static int sm501_register_gpio_i2c(struct sm501_devdata *sm,
1204 struct sm501_platdata *pdata)
1205 {
1206 struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c;
1207 int index;
1208 int ret;
1209
1210 for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) {
1211 ret = sm501_register_gpio_i2c_instance(sm, iic);
1212 if (ret < 0)
1213 return ret;
1214 }
1215
1216 return 0;
1217 }
1218
1219 /* sm501_dbg_regs
1220 *
1221 * Debug attribute to attach to parent device to show core registers
1222 */
1223
1224 static ssize_t sm501_dbg_regs(struct device *dev,
1225 struct device_attribute *attr, char *buff)
1226 {
1227 struct sm501_devdata *sm = dev_get_drvdata(dev) ;
1228 unsigned int reg;
1229 char *ptr = buff;
1230 int ret;
1231
1232 for (reg = 0x00; reg < 0x70; reg += 4) {
1233 ret = sprintf(ptr, "%08x = %08x\n",
1234 reg, readl(sm->regs + reg));
1235 ptr += ret;
1236 }
1237
1238 return ptr - buff;
1239 }
1240
1241
1242 static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL);
1243
1244 /* sm501_init_reg
1245 *
1246 * Helper function for the init code to setup a register
1247 *
1248 * clear the bits which are set in r->mask, and then set
1249 * the bits set in r->set.
1250 */
1251
1252 static inline void sm501_init_reg(struct sm501_devdata *sm,
1253 unsigned long reg,
1254 struct sm501_reg_init *r)
1255 {
1256 unsigned long tmp;
1257
1258 tmp = readl(sm->regs + reg);
1259 tmp &= ~r->mask;
1260 tmp |= r->set;
1261 writel(tmp, sm->regs + reg);
1262 }
1263
1264 /* sm501_init_regs
1265 *
1266 * Setup core register values
1267 */
1268
1269 static void sm501_init_regs(struct sm501_devdata *sm,
1270 struct sm501_initdata *init)
1271 {
1272 sm501_misc_control(sm->dev,
1273 init->misc_control.set,
1274 init->misc_control.mask);
1275
1276 sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing);
1277 sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low);
1278 sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high);
1279
1280 if (init->m1xclk) {
1281 dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk);
1282 sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk);
1283 }
1284
1285 if (init->mclk) {
1286 dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
1287 sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
1288 }
1289
1290 }
1291
1292 /* Check the PLL sources for the M1CLK and M1XCLK
1293 *
1294 * If the M1CLK and M1XCLKs are not sourced from the same PLL, then
1295 * there is a risk (see errata AB-5) that the SM501 will cease proper
1296 * function. If this happens, then it is likely the SM501 will
1297 * hang the system.
1298 */
1299
1300 static int sm501_check_clocks(struct sm501_devdata *sm)
1301 {
1302 unsigned long pwrmode = readl(sm->regs + SM501_CURRENT_CLOCK);
1303 unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC);
1304 unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC);
1305
1306 return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0));
1307 }
1308
1309 static unsigned int sm501_mem_local[] = {
1310 [0] = 4*1024*1024,
1311 [1] = 8*1024*1024,
1312 [2] = 16*1024*1024,
1313 [3] = 32*1024*1024,
1314 [4] = 64*1024*1024,
1315 [5] = 2*1024*1024,
1316 };
1317
1318 /* sm501_init_dev
1319 *
1320 * Common init code for an SM501
1321 */
1322
1323 static int __devinit sm501_init_dev(struct sm501_devdata *sm)
1324 {
1325 struct sm501_initdata *idata;
1326 struct sm501_platdata *pdata;
1327 resource_size_t mem_avail;
1328 unsigned long dramctrl;
1329 unsigned long devid;
1330 int ret;
1331
1332 mutex_init(&sm->clock_lock);
1333 spin_lock_init(&sm->reg_lock);
1334
1335 INIT_LIST_HEAD(&sm->devices);
1336
1337 devid = readl(sm->regs + SM501_DEVICEID);
1338
1339 if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) {
1340 dev_err(sm->dev, "incorrect device id %08lx\n", devid);
1341 return -EINVAL;
1342 }
1343
1344 /* disable irqs */
1345 writel(0, sm->regs + SM501_IRQ_MASK);
1346
1347 dramctrl = readl(sm->regs + SM501_DRAM_CONTROL);
1348 mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7];
1349
1350 dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n",
1351 sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq);
1352
1353 sm->rev = devid & SM501_DEVICEID_REVMASK;
1354
1355 sm501_dump_gate(sm);
1356
1357 ret = device_create_file(sm->dev, &dev_attr_dbg_regs);
1358 if (ret)
1359 dev_err(sm->dev, "failed to create debug regs file\n");
1360
1361 sm501_dump_clk(sm);
1362
1363 /* check to see if we have some device initialisation */
1364
1365 pdata = sm->platdata;
1366 idata = pdata ? pdata->init : NULL;
1367
1368 if (idata) {
1369 sm501_init_regs(sm, idata);
1370
1371 if (idata->devices & SM501_USE_USB_HOST)
1372 sm501_register_usbhost(sm, &mem_avail);
1373 if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1))
1374 sm501_register_uart(sm, idata->devices);
1375 if (idata->devices & SM501_USE_GPIO)
1376 sm501_register_gpio(sm);
1377 }
1378
1379 if (pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
1380 if (!sm501_gpio_isregistered(sm))
1381 dev_err(sm->dev, "no gpio available for i2c gpio.\n");
1382 else
1383 sm501_register_gpio_i2c(sm, pdata);
1384 }
1385
1386 ret = sm501_check_clocks(sm);
1387 if (ret) {
1388 dev_err(sm->dev, "M1X and M clocks sourced from different "
1389 "PLLs\n");
1390 return -EINVAL;
1391 }
1392
1393 /* always create a framebuffer */
1394 sm501_register_display(sm, &mem_avail);
1395
1396 return 0;
1397 }
1398
1399 static int __devinit sm501_plat_probe(struct platform_device *dev)
1400 {
1401 struct sm501_devdata *sm;
1402 int ret;
1403
1404 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1405 if (sm == NULL) {
1406 dev_err(&dev->dev, "no memory for device data\n");
1407 ret = -ENOMEM;
1408 goto err1;
1409 }
1410
1411 sm->dev = &dev->dev;
1412 sm->pdev_id = dev->id;
1413 sm->platdata = dev->dev.platform_data;
1414
1415 ret = platform_get_irq(dev, 0);
1416 if (ret < 0) {
1417 dev_err(&dev->dev, "failed to get irq resource\n");
1418 goto err_res;
1419 }
1420 sm->irq = ret;
1421
1422 sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1423 sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1424 if (sm->io_res == NULL || sm->mem_res == NULL) {
1425 dev_err(&dev->dev, "failed to get IO resource\n");
1426 ret = -ENOENT;
1427 goto err_res;
1428 }
1429
1430 sm->regs_claim = request_mem_region(sm->io_res->start,
1431 0x100, "sm501");
1432
1433 if (sm->regs_claim == NULL) {
1434 dev_err(&dev->dev, "cannot claim registers\n");
1435 ret = -EBUSY;
1436 goto err_res;
1437 }
1438
1439 platform_set_drvdata(dev, sm);
1440
1441 sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
1442
1443 if (sm->regs == NULL) {
1444 dev_err(&dev->dev, "cannot remap registers\n");
1445 ret = -EIO;
1446 goto err_claim;
1447 }
1448
1449 return sm501_init_dev(sm);
1450
1451 err_claim:
1452 release_resource(sm->regs_claim);
1453 kfree(sm->regs_claim);
1454 err_res:
1455 kfree(sm);
1456 err1:
1457 return ret;
1458
1459 }
1460
1461 #ifdef CONFIG_PM
1462
1463 /* power management support */
1464
1465 static void sm501_set_power(struct sm501_devdata *sm, int on)
1466 {
1467 struct sm501_platdata *pd = sm->platdata;
1468
1469 if (pd == NULL)
1470 return;
1471
1472 if (pd->get_power) {
1473 if (pd->get_power(sm->dev) == on) {
1474 dev_dbg(sm->dev, "is already %d\n", on);
1475 return;
1476 }
1477 }
1478
1479 if (pd->set_power) {
1480 dev_dbg(sm->dev, "setting power to %d\n", on);
1481
1482 pd->set_power(sm->dev, on);
1483 sm501_mdelay(sm, 10);
1484 }
1485 }
1486
1487 static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
1488 {
1489 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1490
1491 sm->in_suspend = 1;
1492 sm->pm_misc = readl(sm->regs + SM501_MISC_CONTROL);
1493
1494 sm501_dump_regs(sm);
1495
1496 if (sm->platdata) {
1497 if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF)
1498 sm501_set_power(sm, 0);
1499 }
1500
1501 return 0;
1502 }
1503
1504 static int sm501_plat_resume(struct platform_device *pdev)
1505 {
1506 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1507
1508 sm501_set_power(sm, 1);
1509
1510 sm501_dump_regs(sm);
1511 sm501_dump_gate(sm);
1512 sm501_dump_clk(sm);
1513
1514 /* check to see if we are in the same state as when suspended */
1515
1516 if (readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) {
1517 dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n");
1518 writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL);
1519
1520 /* our suspend causes the controller state to change,
1521 * either by something attempting setup, power loss,
1522 * or an external reset event on power change */
1523
1524 if (sm->platdata && sm->platdata->init) {
1525 sm501_init_regs(sm, sm->platdata->init);
1526 }
1527 }
1528
1529 /* dump our state from resume */
1530
1531 sm501_dump_regs(sm);
1532 sm501_dump_clk(sm);
1533
1534 sm->in_suspend = 0;
1535
1536 return 0;
1537 }
1538 #else
1539 #define sm501_plat_suspend NULL
1540 #define sm501_plat_resume NULL
1541 #endif
1542
1543 /* Initialisation data for PCI devices */
1544
1545 static struct sm501_initdata sm501_pci_initdata = {
1546 .gpio_high = {
1547 .set = 0x3F000000, /* 24bit panel */
1548 .mask = 0x0,
1549 },
1550 .misc_timing = {
1551 .set = 0x010100, /* SDRAM timing */
1552 .mask = 0x1F1F00,
1553 },
1554 .misc_control = {
1555 .set = SM501_MISC_PNL_24BIT,
1556 .mask = 0,
1557 },
1558
1559 .devices = SM501_USE_ALL,
1560
1561 /* Errata AB-3 says that 72MHz is the fastest available
1562 * for 33MHZ PCI with proper bus-mastering operation */
1563
1564 .mclk = 72 * MHZ,
1565 .m1xclk = 144 * MHZ,
1566 };
1567
1568 static struct sm501_platdata_fbsub sm501_pdata_fbsub = {
1569 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1570 SM501FB_FLAG_USE_HWCURSOR |
1571 SM501FB_FLAG_USE_HWACCEL |
1572 SM501FB_FLAG_DISABLE_AT_EXIT),
1573 };
1574
1575 static struct sm501_platdata_fb sm501_fb_pdata = {
1576 .fb_route = SM501_FB_OWN,
1577 .fb_crt = &sm501_pdata_fbsub,
1578 .fb_pnl = &sm501_pdata_fbsub,
1579 };
1580
1581 static struct sm501_platdata sm501_pci_platdata = {
1582 .init = &sm501_pci_initdata,
1583 .fb = &sm501_fb_pdata,
1584 .gpio_base = -1,
1585 };
1586
1587 static int __devinit sm501_pci_probe(struct pci_dev *dev,
1588 const struct pci_device_id *id)
1589 {
1590 struct sm501_devdata *sm;
1591 int err;
1592
1593 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1594 if (sm == NULL) {
1595 dev_err(&dev->dev, "no memory for device data\n");
1596 err = -ENOMEM;
1597 goto err1;
1598 }
1599
1600 /* set a default set of platform data */
1601 dev->dev.platform_data = sm->platdata = &sm501_pci_platdata;
1602
1603 /* set a hopefully unique id for our child platform devices */
1604 sm->pdev_id = 32 + dev->devfn;
1605
1606 pci_set_drvdata(dev, sm);
1607
1608 err = pci_enable_device(dev);
1609 if (err) {
1610 dev_err(&dev->dev, "cannot enable device\n");
1611 goto err2;
1612 }
1613
1614 sm->dev = &dev->dev;
1615 sm->irq = dev->irq;
1616
1617 #ifdef __BIG_ENDIAN
1618 /* if the system is big-endian, we most probably have a
1619 * translation in the IO layer making the PCI bus little endian
1620 * so make the framebuffer swapped pixels */
1621
1622 sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN;
1623 #endif
1624
1625 /* check our resources */
1626
1627 if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) {
1628 dev_err(&dev->dev, "region #0 is not memory?\n");
1629 err = -EINVAL;
1630 goto err3;
1631 }
1632
1633 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) {
1634 dev_err(&dev->dev, "region #1 is not memory?\n");
1635 err = -EINVAL;
1636 goto err3;
1637 }
1638
1639 /* make our resources ready for sharing */
1640
1641 sm->io_res = &dev->resource[1];
1642 sm->mem_res = &dev->resource[0];
1643
1644 sm->regs_claim = request_mem_region(sm->io_res->start,
1645 0x100, "sm501");
1646 if (sm->regs_claim == NULL) {
1647 dev_err(&dev->dev, "cannot claim registers\n");
1648 err= -EBUSY;
1649 goto err3;
1650 }
1651
1652 sm->regs = pci_ioremap_bar(dev, 1);
1653
1654 if (sm->regs == NULL) {
1655 dev_err(&dev->dev, "cannot remap registers\n");
1656 err = -EIO;
1657 goto err4;
1658 }
1659
1660 sm501_init_dev(sm);
1661 return 0;
1662
1663 err4:
1664 release_resource(sm->regs_claim);
1665 kfree(sm->regs_claim);
1666 err3:
1667 pci_disable_device(dev);
1668 err2:
1669 pci_set_drvdata(dev, NULL);
1670 kfree(sm);
1671 err1:
1672 return err;
1673 }
1674
1675 static void sm501_remove_sub(struct sm501_devdata *sm,
1676 struct sm501_device *smdev)
1677 {
1678 list_del(&smdev->list);
1679 platform_device_unregister(&smdev->pdev);
1680 }
1681
1682 static void sm501_dev_remove(struct sm501_devdata *sm)
1683 {
1684 struct sm501_device *smdev, *tmp;
1685
1686 list_for_each_entry_safe(smdev, tmp, &sm->devices, list)
1687 sm501_remove_sub(sm, smdev);
1688
1689 device_remove_file(sm->dev, &dev_attr_dbg_regs);
1690
1691 sm501_gpio_remove(sm);
1692 }
1693
1694 static void __devexit sm501_pci_remove(struct pci_dev *dev)
1695 {
1696 struct sm501_devdata *sm = pci_get_drvdata(dev);
1697
1698 sm501_dev_remove(sm);
1699 iounmap(sm->regs);
1700
1701 release_resource(sm->regs_claim);
1702 kfree(sm->regs_claim);
1703
1704 pci_set_drvdata(dev, NULL);
1705 pci_disable_device(dev);
1706 }
1707
1708 static int sm501_plat_remove(struct platform_device *dev)
1709 {
1710 struct sm501_devdata *sm = platform_get_drvdata(dev);
1711
1712 sm501_dev_remove(sm);
1713 iounmap(sm->regs);
1714
1715 release_resource(sm->regs_claim);
1716 kfree(sm->regs_claim);
1717
1718 return 0;
1719 }
1720
1721 static struct pci_device_id sm501_pci_tbl[] = {
1722 { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1723 { 0, },
1724 };
1725
1726 MODULE_DEVICE_TABLE(pci, sm501_pci_tbl);
1727
1728 static struct pci_driver sm501_pci_driver = {
1729 .name = "sm501",
1730 .id_table = sm501_pci_tbl,
1731 .probe = sm501_pci_probe,
1732 .remove = __devexit_p(sm501_pci_remove),
1733 };
1734
1735 MODULE_ALIAS("platform:sm501");
1736
1737 static struct platform_driver sm501_plat_driver = {
1738 .driver = {
1739 .name = "sm501",
1740 .owner = THIS_MODULE,
1741 },
1742 .probe = sm501_plat_probe,
1743 .remove = sm501_plat_remove,
1744 .suspend = sm501_plat_suspend,
1745 .resume = sm501_plat_resume,
1746 };
1747
1748 static int __init sm501_base_init(void)
1749 {
1750 platform_driver_register(&sm501_plat_driver);
1751 return pci_register_driver(&sm501_pci_driver);
1752 }
1753
1754 static void __exit sm501_base_exit(void)
1755 {
1756 platform_driver_unregister(&sm501_plat_driver);
1757 pci_unregister_driver(&sm501_pci_driver);
1758 }
1759
1760 module_init(sm501_base_init);
1761 module_exit(sm501_base_exit);
1762
1763 MODULE_DESCRIPTION("SM501 Core Driver");
1764 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders");
1765 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree