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kernel: rename is_single_threaded(task) to current_is_single_threaded(void)
[linux-2.6/mini2440.git] / drivers / mfd / sm501.c
blob0cc5eeff5ee8bf7cd5568eabfcc31e82b05675b3
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
24 #include <linux/sm501.h>
25 #include <linux/sm501-regs.h>
26 #include <linux/serial_8250.h>
27
28 #include <asm/io.h>
29
30 struct sm501_device {
31 struct list_head list;
32 struct platform_device pdev;
33 };
34
35 struct sm501_gpio;
36
37 #ifdef CONFIG_MFD_SM501_GPIO
38 #include <linux/gpio.h>
39
40 struct sm501_gpio_chip {
41 struct gpio_chip gpio;
42 struct sm501_gpio *ourgpio; /* to get back to parent. */
43 void __iomem *regbase;
44 void __iomem *control; /* address of control reg. */
45 };
46
47 struct sm501_gpio {
48 struct sm501_gpio_chip low;
49 struct sm501_gpio_chip high;
50 spinlock_t lock;
51
52 unsigned int registered : 1;
53 void __iomem *regs;
54 struct resource *regs_res;
55 };
56 #else
57 struct sm501_gpio {
58 /* no gpio support, empty definition for sm501_devdata. */
59 };
60 #endif
61
62 struct sm501_devdata {
63 spinlock_t reg_lock;
64 struct mutex clock_lock;
65 struct list_head devices;
66 struct sm501_gpio gpio;
67
68 struct device *dev;
69 struct resource *io_res;
70 struct resource *mem_res;
71 struct resource *regs_claim;
72 struct sm501_platdata *platdata;
73
74
75 unsigned int in_suspend;
76 unsigned long pm_misc;
77
78 int unit_power[20];
79 unsigned int pdev_id;
80 unsigned int irq;
81 void __iomem *regs;
82 unsigned int rev;
83 };
84
85
86 #define MHZ (1000 * 1000)
87
88 #ifdef DEBUG
89 static const unsigned int div_tab[] = {
90 [0] = 1,
91 [1] = 2,
92 [2] = 4,
93 [3] = 8,
94 [4] = 16,
95 [5] = 32,
96 [6] = 64,
97 [7] = 128,
98 [8] = 3,
99 [9] = 6,
100 [10] = 12,
101 [11] = 24,
102 [12] = 48,
103 [13] = 96,
104 [14] = 192,
105 [15] = 384,
106 [16] = 5,
107 [17] = 10,
108 [18] = 20,
109 [19] = 40,
110 [20] = 80,
111 [21] = 160,
112 [22] = 320,
113 [23] = 604,
114 };
115
116 static unsigned long decode_div(unsigned long pll2, unsigned long val,
117 unsigned int lshft, unsigned int selbit,
118 unsigned long mask)
119 {
120 if (val & selbit)
121 pll2 = 288 * MHZ;
122
123 return pll2 / div_tab[(val >> lshft) & mask];
124 }
125
126 #define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
127
128 /* sm501_dump_clk
129 *
130 * Print out the current clock configuration for the device
131 */
132
133 static void sm501_dump_clk(struct sm501_devdata *sm)
134 {
135 unsigned long misct = readl(sm->regs + SM501_MISC_TIMING);
136 unsigned long pm0 = readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
137 unsigned long pm1 = readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
138 unsigned long pmc = readl(sm->regs + SM501_POWER_MODE_CONTROL);
139 unsigned long sdclk0, sdclk1;
140 unsigned long pll2 = 0;
141
142 switch (misct & 0x30) {
143 case 0x00:
144 pll2 = 336 * MHZ;
145 break;
146 case 0x10:
147 pll2 = 288 * MHZ;
148 break;
149 case 0x20:
150 pll2 = 240 * MHZ;
151 break;
152 case 0x30:
153 pll2 = 192 * MHZ;
154 break;
155 }
156
157 sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ;
158 sdclk0 /= div_tab[((misct >> 8) & 0xf)];
159
160 sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ;
161 sdclk1 /= div_tab[((misct >> 16) & 0xf)];
162
163 dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n",
164 misct, pm0, pm1);
165
166 dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n",
167 fmt_freq(pll2), sdclk0, sdclk1);
168
169 dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1);
170
171 dev_dbg(sm->dev, "PM0[%c]: "
172 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
173 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
174 (pmc & 3 ) == 0 ? '*' : '-',
175 fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)),
176 fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)),
177 fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)),
178 fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15)));
179
180 dev_dbg(sm->dev, "PM1[%c]: "
181 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
182 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
183 (pmc & 3 ) == 1 ? '*' : '-',
184 fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)),
185 fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)),
186 fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)),
187 fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15)));
188 }
189
190 static void sm501_dump_regs(struct sm501_devdata *sm)
191 {
192 void __iomem *regs = sm->regs;
193
194 dev_info(sm->dev, "System Control %08x\n",
195 readl(regs + SM501_SYSTEM_CONTROL));
196 dev_info(sm->dev, "Misc Control %08x\n",
197 readl(regs + SM501_MISC_CONTROL));
198 dev_info(sm->dev, "GPIO Control Low %08x\n",
199 readl(regs + SM501_GPIO31_0_CONTROL));
200 dev_info(sm->dev, "GPIO Control Hi %08x\n",
201 readl(regs + SM501_GPIO63_32_CONTROL));
202 dev_info(sm->dev, "DRAM Control %08x\n",
203 readl(regs + SM501_DRAM_CONTROL));
204 dev_info(sm->dev, "Arbitration Ctrl %08x\n",
205 readl(regs + SM501_ARBTRTN_CONTROL));
206 dev_info(sm->dev, "Misc Timing %08x\n",
207 readl(regs + SM501_MISC_TIMING));
208 }
209
210 static void sm501_dump_gate(struct sm501_devdata *sm)
211 {
212 dev_info(sm->dev, "CurrentGate %08x\n",
213 readl(sm->regs + SM501_CURRENT_GATE));
214 dev_info(sm->dev, "CurrentClock %08x\n",
215 readl(sm->regs + SM501_CURRENT_CLOCK));
216 dev_info(sm->dev, "PowerModeControl %08x\n",
217 readl(sm->regs + SM501_POWER_MODE_CONTROL));
218 }
219
220 #else
221 static inline void sm501_dump_gate(struct sm501_devdata *sm) { }
222 static inline void sm501_dump_regs(struct sm501_devdata *sm) { }
223 static inline void sm501_dump_clk(struct sm501_devdata *sm) { }
224 #endif
225
226 /* sm501_sync_regs
227 *
228 * ensure the
229 */
230
231 static void sm501_sync_regs(struct sm501_devdata *sm)
232 {
233 readl(sm->regs);
234 }
235
236 static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay)
237 {
238 /* during suspend/resume, we are currently not allowed to sleep,
239 * so change to using mdelay() instead of msleep() if we
240 * are in one of these paths */
241
242 if (sm->in_suspend)
243 mdelay(delay);
244 else
245 msleep(delay);
246 }
247
248 /* sm501_misc_control
249 *
250 * alters the miscellaneous control parameters
251 */
252
253 int sm501_misc_control(struct device *dev,
254 unsigned long set, unsigned long clear)
255 {
256 struct sm501_devdata *sm = dev_get_drvdata(dev);
257 unsigned long misc;
258 unsigned long save;
259 unsigned long to;
260
261 spin_lock_irqsave(&sm->reg_lock, save);
262
263 misc = readl(sm->regs + SM501_MISC_CONTROL);
264 to = (misc & ~clear) | set;
265
266 if (to != misc) {
267 writel(to, sm->regs + SM501_MISC_CONTROL);
268 sm501_sync_regs(sm);
269
270 dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc);
271 }
272
273 spin_unlock_irqrestore(&sm->reg_lock, save);
274 return to;
275 }
276
277 EXPORT_SYMBOL_GPL(sm501_misc_control);
278
279 /* sm501_modify_reg
280 *
281 * Modify a register in the SM501 which may be shared with other
282 * drivers.
283 */
284
285 unsigned long sm501_modify_reg(struct device *dev,
286 unsigned long reg,
287 unsigned long set,
288 unsigned long clear)
289 {
290 struct sm501_devdata *sm = dev_get_drvdata(dev);
291 unsigned long data;
292 unsigned long save;
293
294 spin_lock_irqsave(&sm->reg_lock, save);
295
296 data = readl(sm->regs + reg);
297 data |= set;
298 data &= ~clear;
299
300 writel(data, sm->regs + reg);
301 sm501_sync_regs(sm);
302
303 spin_unlock_irqrestore(&sm->reg_lock, save);
304
305 return data;
306 }
307
308 EXPORT_SYMBOL_GPL(sm501_modify_reg);
309
310 /* sm501_unit_power
311 *
312 * alters the power active gate to set specific units on or off
313 */
314
315 int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
316 {
317 struct sm501_devdata *sm = dev_get_drvdata(dev);
318 unsigned long mode;
319 unsigned long gate;
320 unsigned long clock;
321
322 mutex_lock(&sm->clock_lock);
323
324 mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
325 gate = readl(sm->regs + SM501_CURRENT_GATE);
326 clock = readl(sm->regs + SM501_CURRENT_CLOCK);
327
328 mode &= 3; /* get current power mode */
329
330 if (unit >= ARRAY_SIZE(sm->unit_power)) {
331 dev_err(dev, "%s: bad unit %d\n", __func__, unit);
332 goto already;
333 }
334
335 dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit,
336 sm->unit_power[unit], to);
337
338 if (to == 0 && sm->unit_power[unit] == 0) {
339 dev_err(sm->dev, "unit %d is already shutdown\n", unit);
340 goto already;
341 }
342
343 sm->unit_power[unit] += to ? 1 : -1;
344 to = sm->unit_power[unit] ? 1 : 0;
345
346 if (to) {
347 if (gate & (1 << unit))
348 goto already;
349 gate |= (1 << unit);
350 } else {
351 if (!(gate & (1 << unit)))
352 goto already;
353 gate &= ~(1 << unit);
354 }
355
356 switch (mode) {
357 case 1:
358 writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
359 writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
360 mode = 0;
361 break;
362 case 2:
363 case 0:
364 writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
365 writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
366 mode = 1;
367 break;
368
369 default:
370 gate = -1;
371 goto already;
372 }
373
374 writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
375 sm501_sync_regs(sm);
376
377 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
378 gate, clock, mode);
379
380 sm501_mdelay(sm, 16);
381
382 already:
383 mutex_unlock(&sm->clock_lock);
384 return gate;
385 }
386
387 EXPORT_SYMBOL_GPL(sm501_unit_power);
388
389
390 /* Perform a rounded division. */
391 static long sm501fb_round_div(long num, long denom)
392 {
393 /* n / d + 1 / 2 = (2n + d) / 2d */
394 return (2 * num + denom) / (2 * denom);
395 }
396
397 /* clock value structure. */
398 struct sm501_clock {
399 unsigned long mclk;
400 int divider;
401 int shift;
402 unsigned int m, n, k;
403 };
404
405 /* sm501_calc_clock
406 *
407 * Calculates the nearest discrete clock frequency that
408 * can be achieved with the specified input clock.
409 * the maximum divisor is 3 or 5
410 */
411
412 static int sm501_calc_clock(unsigned long freq,
413 struct sm501_clock *clock,
414 int max_div,
415 unsigned long mclk,
416 long *best_diff)
417 {
418 int ret = 0;
419 int divider;
420 int shift;
421 long diff;
422
423 /* try dividers 1 and 3 for CRT and for panel,
424 try divider 5 for panel only.*/
425
426 for (divider = 1; divider <= max_div; divider += 2) {
427 /* try all 8 shift values.*/
428 for (shift = 0; shift < 8; shift++) {
429 /* Calculate difference to requested clock */
430 diff = sm501fb_round_div(mclk, divider << shift) - freq;
431 if (diff < 0)
432 diff = -diff;
433
434 /* If it is less than the current, use it */
435 if (diff < *best_diff) {
436 *best_diff = diff;
437
438 clock->mclk = mclk;
439 clock->divider = divider;
440 clock->shift = shift;
441 ret = 1;
442 }
443 }
444 }
445
446 return ret;
447 }
448
449 /* sm501_calc_pll
450 *
451 * Calculates the nearest discrete clock frequency that can be
452 * achieved using the programmable PLL.
453 * the maximum divisor is 3 or 5
454 */
455
456 static unsigned long sm501_calc_pll(unsigned long freq,
457 struct sm501_clock *clock,
458 int max_div)
459 {
460 unsigned long mclk;
461 unsigned int m, n, k;
462 long best_diff = 999999999;
463
464 /*
465 * The SM502 datasheet doesn't specify the min/max values for M and N.
466 * N = 1 at least doesn't work in practice.
467 */
468 for (m = 2; m <= 255; m++) {
469 for (n = 2; n <= 127; n++) {
470 for (k = 0; k <= 1; k++) {
471 mclk = (24000000UL * m / n) >> k;
472
473 if (sm501_calc_clock(freq, clock, max_div,
474 mclk, &best_diff)) {
475 clock->m = m;
476 clock->n = n;
477 clock->k = k;
478 }
479 }
480 }
481 }
482
483 /* Return best clock. */
484 return clock->mclk / (clock->divider << clock->shift);
485 }
486
487 /* sm501_select_clock
488 *
489 * Calculates the nearest discrete clock frequency that can be
490 * achieved using the 288MHz and 336MHz PLLs.
491 * the maximum divisor is 3 or 5
492 */
493
494 static unsigned long sm501_select_clock(unsigned long freq,
495 struct sm501_clock *clock,
496 int max_div)
497 {
498 unsigned long mclk;
499 long best_diff = 999999999;
500
501 /* Try 288MHz and 336MHz clocks. */
502 for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) {
503 sm501_calc_clock(freq, clock, max_div, mclk, &best_diff);
504 }
505
506 /* Return best clock. */
507 return clock->mclk / (clock->divider << clock->shift);
508 }
509
510 /* sm501_set_clock
511 *
512 * set one of the four clock sources to the closest available frequency to
513 * the one specified
514 */
515
516 unsigned long sm501_set_clock(struct device *dev,
517 int clksrc,
518 unsigned long req_freq)
519 {
520 struct sm501_devdata *sm = dev_get_drvdata(dev);
521 unsigned long mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
522 unsigned long gate = readl(sm->regs + SM501_CURRENT_GATE);
523 unsigned long clock = readl(sm->regs + SM501_CURRENT_CLOCK);
524 unsigned char reg;
525 unsigned int pll_reg = 0;
526 unsigned long sm501_freq; /* the actual frequency acheived */
527
528 struct sm501_clock to;
529
530 /* find achivable discrete frequency and setup register value
531 * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK
532 * has an extra bit for the divider */
533
534 switch (clksrc) {
535 case SM501_CLOCK_P2XCLK:
536 /* This clock is divided in half so to achive the
537 * requested frequency the value must be multiplied by
538 * 2. This clock also has an additional pre divisor */
539
540 if (sm->rev >= 0xC0) {
541 /* SM502 -> use the programmable PLL */
542 sm501_freq = (sm501_calc_pll(2 * req_freq,
543 &to, 5) / 2);
544 reg = to.shift & 0x07;/* bottom 3 bits are shift */
545 if (to.divider == 3)
546 reg |= 0x08; /* /3 divider required */
547 else if (to.divider == 5)
548 reg |= 0x10; /* /5 divider required */
549 reg |= 0x40; /* select the programmable PLL */
550 pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m;
551 } else {
552 sm501_freq = (sm501_select_clock(2 * req_freq,
553 &to, 5) / 2);
554 reg = to.shift & 0x07;/* bottom 3 bits are shift */
555 if (to.divider == 3)
556 reg |= 0x08; /* /3 divider required */
557 else if (to.divider == 5)
558 reg |= 0x10; /* /5 divider required */
559 if (to.mclk != 288000000)
560 reg |= 0x20; /* which mclk pll is source */
561 }
562 break;
563
564 case SM501_CLOCK_V2XCLK:
565 /* This clock is divided in half so to achive the
566 * requested frequency the value must be multiplied by 2. */
567
568 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
569 reg=to.shift & 0x07; /* bottom 3 bits are shift */
570 if (to.divider == 3)
571 reg |= 0x08; /* /3 divider required */
572 if (to.mclk != 288000000)
573 reg |= 0x10; /* which mclk pll is source */
574 break;
575
576 case SM501_CLOCK_MCLK:
577 case SM501_CLOCK_M1XCLK:
578 /* These clocks are the same and not further divided */
579
580 sm501_freq = sm501_select_clock( req_freq, &to, 3);
581 reg=to.shift & 0x07; /* bottom 3 bits are shift */
582 if (to.divider == 3)
583 reg |= 0x08; /* /3 divider required */
584 if (to.mclk != 288000000)
585 reg |= 0x10; /* which mclk pll is source */
586 break;
587
588 default:
589 return 0; /* this is bad */
590 }
591
592 mutex_lock(&sm->clock_lock);
593
594 mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
595 gate = readl(sm->regs + SM501_CURRENT_GATE);
596 clock = readl(sm->regs + SM501_CURRENT_CLOCK);
597
598 clock = clock & ~(0xFF << clksrc);
599 clock |= reg<<clksrc;
600
601 mode &= 3; /* find current mode */
602
603 switch (mode) {
604 case 1:
605 writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
606 writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
607 mode = 0;
608 break;
609 case 2:
610 case 0:
611 writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
612 writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
613 mode = 1;
614 break;
615
616 default:
617 mutex_unlock(&sm->clock_lock);
618 return -1;
619 }
620
621 writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
622
623 if (pll_reg)
624 writel(pll_reg, sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
625
626 sm501_sync_regs(sm);
627
628 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
629 gate, clock, mode);
630
631 sm501_mdelay(sm, 16);
632 mutex_unlock(&sm->clock_lock);
633
634 sm501_dump_clk(sm);
635
636 return sm501_freq;
637 }
638
639 EXPORT_SYMBOL_GPL(sm501_set_clock);
640
641 /* sm501_find_clock
642 *
643 * finds the closest available frequency for a given clock
644 */
645
646 unsigned long sm501_find_clock(struct device *dev,
647 int clksrc,
648 unsigned long req_freq)
649 {
650 struct sm501_devdata *sm = dev_get_drvdata(dev);
651 unsigned long sm501_freq; /* the frequency achiveable by the 501 */
652 struct sm501_clock to;
653
654 switch (clksrc) {
655 case SM501_CLOCK_P2XCLK:
656 if (sm->rev >= 0xC0) {
657 /* SM502 -> use the programmable PLL */
658 sm501_freq = (sm501_calc_pll(2 * req_freq,
659 &to, 5) / 2);
660 } else {
661 sm501_freq = (sm501_select_clock(2 * req_freq,
662 &to, 5) / 2);
663 }
664 break;
665
666 case SM501_CLOCK_V2XCLK:
667 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
668 break;
669
670 case SM501_CLOCK_MCLK:
671 case SM501_CLOCK_M1XCLK:
672 sm501_freq = sm501_select_clock(req_freq, &to, 3);
673 break;
674
675 default:
676 sm501_freq = 0; /* error */
677 }
678
679 return sm501_freq;
680 }
681
682 EXPORT_SYMBOL_GPL(sm501_find_clock);
683
684 static struct sm501_device *to_sm_device(struct platform_device *pdev)
685 {
686 return container_of(pdev, struct sm501_device, pdev);
687 }
688
689 /* sm501_device_release
690 *
691 * A release function for the platform devices we create to allow us to
692 * free any items we allocated
693 */
694
695 static void sm501_device_release(struct device *dev)
696 {
697 kfree(to_sm_device(to_platform_device(dev)));
698 }
699
700 /* sm501_create_subdev
701 *
702 * Create a skeleton platform device with resources for passing to a
703 * sub-driver
704 */
705
706 static struct platform_device *
707 sm501_create_subdev(struct sm501_devdata *sm, char *name,
708 unsigned int res_count, unsigned int platform_data_size)
709 {
710 struct sm501_device *smdev;
711
712 smdev = kzalloc(sizeof(struct sm501_device) +
713 (sizeof(struct resource) * res_count) +
714 platform_data_size, GFP_KERNEL);
715 if (!smdev)
716 return NULL;
717
718 smdev->pdev.dev.release = sm501_device_release;
719
720 smdev->pdev.name = name;
721 smdev->pdev.id = sm->pdev_id;
722 smdev->pdev.dev.parent = sm->dev;
723
724 if (res_count) {
725 smdev->pdev.resource = (struct resource *)(smdev+1);
726 smdev->pdev.num_resources = res_count;
727 }
728 if (platform_data_size)
729 smdev->pdev.dev.platform_data = (void *)(smdev+1);
730
731 return &smdev->pdev;
732 }
733
734 /* sm501_register_device
735 *
736 * Register a platform device created with sm501_create_subdev()
737 */
738
739 static int sm501_register_device(struct sm501_devdata *sm,
740 struct platform_device *pdev)
741 {
742 struct sm501_device *smdev = to_sm_device(pdev);
743 int ptr;
744 int ret;
745
746 for (ptr = 0; ptr < pdev->num_resources; ptr++) {
747 printk(KERN_DEBUG "%s[%d] flags %08lx: %08llx..%08llx\n",
748 pdev->name, ptr,
749 pdev->resource[ptr].flags,
750 (unsigned long long)pdev->resource[ptr].start,
751 (unsigned long long)pdev->resource[ptr].end);
752 }
753
754 ret = platform_device_register(pdev);
755
756 if (ret >= 0) {
757 dev_dbg(sm->dev, "registered %s\n", pdev->name);
758 list_add_tail(&smdev->list, &sm->devices);
759 } else
760 dev_err(sm->dev, "error registering %s (%d)\n",
761 pdev->name, ret);
762
763 return ret;
764 }
765
766 /* sm501_create_subio
767 *
768 * Fill in an IO resource for a sub device
769 */
770
771 static void sm501_create_subio(struct sm501_devdata *sm,
772 struct resource *res,
773 resource_size_t offs,
774 resource_size_t size)
775 {
776 res->flags = IORESOURCE_MEM;
777 res->parent = sm->io_res;
778 res->start = sm->io_res->start + offs;
779 res->end = res->start + size - 1;
780 }
781
782 /* sm501_create_mem
783 *
784 * Fill in an MEM resource for a sub device
785 */
786
787 static void sm501_create_mem(struct sm501_devdata *sm,
788 struct resource *res,
789 resource_size_t *offs,
790 resource_size_t size)
791 {
792 *offs -= size; /* adjust memory size */
793
794 res->flags = IORESOURCE_MEM;
795 res->parent = sm->mem_res;
796 res->start = sm->mem_res->start + *offs;
797 res->end = res->start + size - 1;
798 }
799
800 /* sm501_create_irq
801 *
802 * Fill in an IRQ resource for a sub device
803 */
804
805 static void sm501_create_irq(struct sm501_devdata *sm,
806 struct resource *res)
807 {
808 res->flags = IORESOURCE_IRQ;
809 res->parent = NULL;
810 res->start = res->end = sm->irq;
811 }
812
813 static int sm501_register_usbhost(struct sm501_devdata *sm,
814 resource_size_t *mem_avail)
815 {
816 struct platform_device *pdev;
817
818 pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0);
819 if (!pdev)
820 return -ENOMEM;
821
822 sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000);
823 sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024);
824 sm501_create_irq(sm, &pdev->resource[2]);
825
826 return sm501_register_device(sm, pdev);
827 }
828
829 static void sm501_setup_uart_data(struct sm501_devdata *sm,
830 struct plat_serial8250_port *uart_data,
831 unsigned int offset)
832 {
833 uart_data->membase = sm->regs + offset;
834 uart_data->mapbase = sm->io_res->start + offset;
835 uart_data->iotype = UPIO_MEM;
836 uart_data->irq = sm->irq;
837 uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ;
838 uart_data->regshift = 2;
839 uart_data->uartclk = (9600 * 16);
840 }
841
842 static int sm501_register_uart(struct sm501_devdata *sm, int devices)
843 {
844 struct platform_device *pdev;
845 struct plat_serial8250_port *uart_data;
846
847 pdev = sm501_create_subdev(sm, "serial8250", 0,
848 sizeof(struct plat_serial8250_port) * 3);
849 if (!pdev)
850 return -ENOMEM;
851
852 uart_data = pdev->dev.platform_data;
853
854 if (devices & SM501_USE_UART0) {
855 sm501_setup_uart_data(sm, uart_data++, 0x30000);
856 sm501_unit_power(sm->dev, SM501_GATE_UART0, 1);
857 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0);
858 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0);
859 }
860 if (devices & SM501_USE_UART1) {
861 sm501_setup_uart_data(sm, uart_data++, 0x30020);
862 sm501_unit_power(sm->dev, SM501_GATE_UART1, 1);
863 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0);
864 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0);
865 }
866
867 pdev->id = PLAT8250_DEV_SM501;
868
869 return sm501_register_device(sm, pdev);
870 }
871
872 static int sm501_register_display(struct sm501_devdata *sm,
873 resource_size_t *mem_avail)
874 {
875 struct platform_device *pdev;
876
877 pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0);
878 if (!pdev)
879 return -ENOMEM;
880
881 sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000);
882 sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000);
883 sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail);
884 sm501_create_irq(sm, &pdev->resource[3]);
885
886 return sm501_register_device(sm, pdev);
887 }
888
889 #ifdef CONFIG_MFD_SM501_GPIO
890
891 static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc)
892 {
893 return container_of(gc, struct sm501_gpio_chip, gpio);
894 }
895
896 static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio)
897 {
898 return container_of(gpio, struct sm501_devdata, gpio);
899 }
900
901 static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset)
902
903 {
904 struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip);
905 unsigned long result;
906
907 result = readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
908 result >>= offset;
909
910 return result & 1UL;
911 }
912
913 static void sm501_gpio_ensure_gpio(struct sm501_gpio_chip *smchip,
914 unsigned long bit)
915 {
916 unsigned long ctrl;
917
918 /* check and modify if this pin is not set as gpio. */
919
920 if (readl(smchip->control) & bit) {
921 dev_info(sm501_gpio_to_dev(smchip->ourgpio)->dev,
922 "changing mode of gpio, bit %08lx\n", bit);
923
924 ctrl = readl(smchip->control);
925 ctrl &= ~bit;
926 writel(ctrl, smchip->control);
927
928 sm501_sync_regs(sm501_gpio_to_dev(smchip->ourgpio));
929 }
930 }
931
932 static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
933
934 {
935 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
936 struct sm501_gpio *smgpio = smchip->ourgpio;
937 unsigned long bit = 1 << offset;
938 void __iomem *regs = smchip->regbase;
939 unsigned long save;
940 unsigned long val;
941
942 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
943 __func__, chip, offset);
944
945 spin_lock_irqsave(&smgpio->lock, save);
946
947 val = readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
948 if (value)
949 val |= bit;
950 writel(val, regs);
951
952 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
953 sm501_gpio_ensure_gpio(smchip, bit);
954
955 spin_unlock_irqrestore(&smgpio->lock, save);
956 }
957
958 static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
959 {
960 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
961 struct sm501_gpio *smgpio = smchip->ourgpio;
962 void __iomem *regs = smchip->regbase;
963 unsigned long bit = 1 << offset;
964 unsigned long save;
965 unsigned long ddr;
966
967 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
968 __func__, chip, offset);
969
970 spin_lock_irqsave(&smgpio->lock, save);
971
972 ddr = readl(regs + SM501_GPIO_DDR_LOW);
973 writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
974
975 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
976 sm501_gpio_ensure_gpio(smchip, bit);
977
978 spin_unlock_irqrestore(&smgpio->lock, save);
979
980 return 0;
981 }
982
983 static int sm501_gpio_output(struct gpio_chip *chip,
984 unsigned offset, int value)
985 {
986 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
987 struct sm501_gpio *smgpio = smchip->ourgpio;
988 unsigned long bit = 1 << offset;
989 void __iomem *regs = smchip->regbase;
990 unsigned long save;
991 unsigned long val;
992 unsigned long ddr;
993
994 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n",
995 __func__, chip, offset, value);
996
997 spin_lock_irqsave(&smgpio->lock, save);
998
999 val = readl(regs + SM501_GPIO_DATA_LOW);
1000 if (value)
1001 val |= bit;
1002 else
1003 val &= ~bit;
1004 writel(val, regs);
1005
1006 ddr = readl(regs + SM501_GPIO_DDR_LOW);
1007 writel(ddr | bit, regs + SM501_GPIO_DDR_LOW);
1008
1009 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
1010 writel(val, regs + SM501_GPIO_DATA_LOW);
1011
1012 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
1013 spin_unlock_irqrestore(&smgpio->lock, save);
1014
1015 return 0;
1016 }
1017
1018 static struct gpio_chip gpio_chip_template = {
1019 .ngpio = 32,
1020 .direction_input = sm501_gpio_input,
1021 .direction_output = sm501_gpio_output,
1022 .set = sm501_gpio_set,
1023 .get = sm501_gpio_get,
1024 };
1025
1026 static int __devinit sm501_gpio_register_chip(struct sm501_devdata *sm,
1027 struct sm501_gpio *gpio,
1028 struct sm501_gpio_chip *chip)
1029 {
1030 struct sm501_platdata *pdata = sm->platdata;
1031 struct gpio_chip *gchip = &chip->gpio;
1032 int base = pdata->gpio_base;
1033
1034 chip->gpio = gpio_chip_template;
1035
1036 if (chip == &gpio->high) {
1037 if (base > 0)
1038 base += 32;
1039 chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH;
1040 chip->control = sm->regs + SM501_GPIO63_32_CONTROL;
1041 gchip->label = "SM501-HIGH";
1042 } else {
1043 chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW;
1044 chip->control = sm->regs + SM501_GPIO31_0_CONTROL;
1045 gchip->label = "SM501-LOW";
1046 }
1047
1048 gchip->base = base;
1049 chip->ourgpio = gpio;
1050
1051 return gpiochip_add(gchip);
1052 }
1053
1054 static int __devinit sm501_register_gpio(struct sm501_devdata *sm)
1055 {
1056 struct sm501_gpio *gpio = &sm->gpio;
1057 resource_size_t iobase = sm->io_res->start + SM501_GPIO;
1058 int ret;
1059 int tmp;
1060
1061 dev_dbg(sm->dev, "registering gpio block %08llx\n",
1062 (unsigned long long)iobase);
1063
1064 spin_lock_init(&gpio->lock);
1065
1066 gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio");
1067 if (gpio->regs_res == NULL) {
1068 dev_err(sm->dev, "gpio: failed to request region\n");
1069 return -ENXIO;
1070 }
1071
1072 gpio->regs = ioremap(iobase, 0x20);
1073 if (gpio->regs == NULL) {
1074 dev_err(sm->dev, "gpio: failed to remap registers\n");
1075 ret = -ENXIO;
1076 goto err_claimed;
1077 }
1078
1079 /* Register both our chips. */
1080
1081 ret = sm501_gpio_register_chip(sm, gpio, &gpio->low);
1082 if (ret) {
1083 dev_err(sm->dev, "failed to add low chip\n");
1084 goto err_mapped;
1085 }
1086
1087 ret = sm501_gpio_register_chip(sm, gpio, &gpio->high);
1088 if (ret) {
1089 dev_err(sm->dev, "failed to add high chip\n");
1090 goto err_low_chip;
1091 }
1092
1093 gpio->registered = 1;
1094
1095 return 0;
1096
1097 err_low_chip:
1098 tmp = gpiochip_remove(&gpio->low.gpio);
1099 if (tmp) {
1100 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1101 return ret;
1102 }
1103
1104 err_mapped:
1105 iounmap(gpio->regs);
1106
1107 err_claimed:
1108 release_resource(gpio->regs_res);
1109 kfree(gpio->regs_res);
1110
1111 return ret;
1112 }
1113
1114 static void sm501_gpio_remove(struct sm501_devdata *sm)
1115 {
1116 struct sm501_gpio *gpio = &sm->gpio;
1117 int ret;
1118
1119 if (!sm->gpio.registered)
1120 return;
1121
1122 ret = gpiochip_remove(&gpio->low.gpio);
1123 if (ret)
1124 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1125
1126 ret = gpiochip_remove(&gpio->high.gpio);
1127 if (ret)
1128 dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n");
1129
1130 iounmap(gpio->regs);
1131 release_resource(gpio->regs_res);
1132 kfree(gpio->regs_res);
1133 }
1134
1135 static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
1136 {
1137 struct sm501_gpio *gpio = &sm->gpio;
1138 int base = (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base;
1139
1140 return (pin % 32) + base;
1141 }
1142
1143 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
1144 {
1145 return sm->gpio.registered;
1146 }
1147 #else
1148 static inline int sm501_register_gpio(struct sm501_devdata *sm)
1149 {
1150 return 0;
1151 }
1152
1153 static inline void sm501_gpio_remove(struct sm501_devdata *sm)
1154 {
1155 }
1156
1157 static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
1158 {
1159 return -1;
1160 }
1161
1162 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
1163 {
1164 return 0;
1165 }
1166 #endif
1167
1168 static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
1169 struct sm501_platdata_gpio_i2c *iic)
1170 {
1171 struct i2c_gpio_platform_data *icd;
1172 struct platform_device *pdev;
1173
1174 pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
1175 sizeof(struct i2c_gpio_platform_data));
1176 if (!pdev)
1177 return -ENOMEM;
1178
1179 icd = pdev->dev.platform_data;
1180
1181 /* We keep the pin_sda and pin_scl fields relative in case the
1182 * same platform data is passed to >1 SM501.
1183 */
1184
1185 icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda);
1186 icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl);
1187 icd->timeout = iic->timeout;
1188 icd->udelay = iic->udelay;
1189
1190 /* note, we can't use either of the pin numbers, as the i2c-gpio
1191 * driver uses the platform.id field to generate the bus number
1192 * to register with the i2c core; The i2c core doesn't have enough
1193 * entries to deal with anything we currently use.
1194 */
1195
1196 pdev->id = iic->bus_num;
1197
1198 dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n",
1199 iic->bus_num,
1200 icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl);
1201
1202 return sm501_register_device(sm, pdev);
1203 }
1204
1205 static int sm501_register_gpio_i2c(struct sm501_devdata *sm,
1206 struct sm501_platdata *pdata)
1207 {
1208 struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c;
1209 int index;
1210 int ret;
1211
1212 for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) {
1213 ret = sm501_register_gpio_i2c_instance(sm, iic);
1214 if (ret < 0)
1215 return ret;
1216 }
1217
1218 return 0;
1219 }
1220
1221 /* sm501_dbg_regs
1222 *
1223 * Debug attribute to attach to parent device to show core registers
1224 */
1225
1226 static ssize_t sm501_dbg_regs(struct device *dev,
1227 struct device_attribute *attr, char *buff)
1228 {
1229 struct sm501_devdata *sm = dev_get_drvdata(dev) ;
1230 unsigned int reg;
1231 char *ptr = buff;
1232 int ret;
1233
1234 for (reg = 0x00; reg < 0x70; reg += 4) {
1235 ret = sprintf(ptr, "%08x = %08x\n",
1236 reg, readl(sm->regs + reg));
1237 ptr += ret;
1238 }
1239
1240 return ptr - buff;
1241 }
1242
1243
1244 static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL);
1245
1246 /* sm501_init_reg
1247 *
1248 * Helper function for the init code to setup a register
1249 *
1250 * clear the bits which are set in r->mask, and then set
1251 * the bits set in r->set.
1252 */
1253
1254 static inline void sm501_init_reg(struct sm501_devdata *sm,
1255 unsigned long reg,
1256 struct sm501_reg_init *r)
1257 {
1258 unsigned long tmp;
1259
1260 tmp = readl(sm->regs + reg);
1261 tmp &= ~r->mask;
1262 tmp |= r->set;
1263 writel(tmp, sm->regs + reg);
1264 }
1265
1266 /* sm501_init_regs
1267 *
1268 * Setup core register values
1269 */
1270
1271 static void sm501_init_regs(struct sm501_devdata *sm,
1272 struct sm501_initdata *init)
1273 {
1274 sm501_misc_control(sm->dev,
1275 init->misc_control.set,
1276 init->misc_control.mask);
1277
1278 sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing);
1279 sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low);
1280 sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high);
1281
1282 if (init->m1xclk) {
1283 dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk);
1284 sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk);
1285 }
1286
1287 if (init->mclk) {
1288 dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
1289 sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
1290 }
1291
1292 }
1293
1294 /* Check the PLL sources for the M1CLK and M1XCLK
1295 *
1296 * If the M1CLK and M1XCLKs are not sourced from the same PLL, then
1297 * there is a risk (see errata AB-5) that the SM501 will cease proper
1298 * function. If this happens, then it is likely the SM501 will
1299 * hang the system.
1300 */
1301
1302 static int sm501_check_clocks(struct sm501_devdata *sm)
1303 {
1304 unsigned long pwrmode = readl(sm->regs + SM501_CURRENT_CLOCK);
1305 unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC);
1306 unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC);
1307
1308 return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0));
1309 }
1310
1311 static unsigned int sm501_mem_local[] = {
1312 [0] = 4*1024*1024,
1313 [1] = 8*1024*1024,
1314 [2] = 16*1024*1024,
1315 [3] = 32*1024*1024,
1316 [4] = 64*1024*1024,
1317 [5] = 2*1024*1024,
1318 };
1319
1320 /* sm501_init_dev
1321 *
1322 * Common init code for an SM501
1323 */
1324
1325 static int __devinit sm501_init_dev(struct sm501_devdata *sm)
1326 {
1327 struct sm501_initdata *idata;
1328 struct sm501_platdata *pdata;
1329 resource_size_t mem_avail;
1330 unsigned long dramctrl;
1331 unsigned long devid;
1332 int ret;
1333
1334 mutex_init(&sm->clock_lock);
1335 spin_lock_init(&sm->reg_lock);
1336
1337 INIT_LIST_HEAD(&sm->devices);
1338
1339 devid = readl(sm->regs + SM501_DEVICEID);
1340
1341 if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) {
1342 dev_err(sm->dev, "incorrect device id %08lx\n", devid);
1343 return -EINVAL;
1344 }
1345
1346 /* disable irqs */
1347 writel(0, sm->regs + SM501_IRQ_MASK);
1348
1349 dramctrl = readl(sm->regs + SM501_DRAM_CONTROL);
1350 mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7];
1351
1352 dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n",
1353 sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq);
1354
1355 sm->rev = devid & SM501_DEVICEID_REVMASK;
1356
1357 sm501_dump_gate(sm);
1358
1359 ret = device_create_file(sm->dev, &dev_attr_dbg_regs);
1360 if (ret)
1361 dev_err(sm->dev, "failed to create debug regs file\n");
1362
1363 sm501_dump_clk(sm);
1364
1365 /* check to see if we have some device initialisation */
1366
1367 pdata = sm->platdata;
1368 idata = pdata ? pdata->init : NULL;
1369
1370 if (idata) {
1371 sm501_init_regs(sm, idata);
1372
1373 if (idata->devices & SM501_USE_USB_HOST)
1374 sm501_register_usbhost(sm, &mem_avail);
1375 if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1))
1376 sm501_register_uart(sm, idata->devices);
1377 if (idata->devices & SM501_USE_GPIO)
1378 sm501_register_gpio(sm);
1379 }
1380
1381 if (pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
1382 if (!sm501_gpio_isregistered(sm))
1383 dev_err(sm->dev, "no gpio available for i2c gpio.\n");
1384 else
1385 sm501_register_gpio_i2c(sm, pdata);
1386 }
1387
1388 ret = sm501_check_clocks(sm);
1389 if (ret) {
1390 dev_err(sm->dev, "M1X and M clocks sourced from different "
1391 "PLLs\n");
1392 return -EINVAL;
1393 }
1394
1395 /* always create a framebuffer */
1396 sm501_register_display(sm, &mem_avail);
1397
1398 return 0;
1399 }
1400
1401 static int __devinit sm501_plat_probe(struct platform_device *dev)
1402 {
1403 struct sm501_devdata *sm;
1404 int ret;
1405
1406 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1407 if (sm == NULL) {
1408 dev_err(&dev->dev, "no memory for device data\n");
1409 ret = -ENOMEM;
1410 goto err1;
1411 }
1412
1413 sm->dev = &dev->dev;
1414 sm->pdev_id = dev->id;
1415 sm->platdata = dev->dev.platform_data;
1416
1417 ret = platform_get_irq(dev, 0);
1418 if (ret < 0) {
1419 dev_err(&dev->dev, "failed to get irq resource\n");
1420 goto err_res;
1421 }
1422 sm->irq = ret;
1423
1424 sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1425 sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1426 if (sm->io_res == NULL || sm->mem_res == NULL) {
1427 dev_err(&dev->dev, "failed to get IO resource\n");
1428 ret = -ENOENT;
1429 goto err_res;
1430 }
1431
1432 sm->regs_claim = request_mem_region(sm->io_res->start,
1433 0x100, "sm501");
1434
1435 if (sm->regs_claim == NULL) {
1436 dev_err(&dev->dev, "cannot claim registers\n");
1437 ret = -EBUSY;
1438 goto err_res;
1439 }
1440
1441 platform_set_drvdata(dev, sm);
1442
1443 sm->regs = ioremap(sm->io_res->start,
1444 (sm->io_res->end - sm->io_res->start) - 1);
1445
1446 if (sm->regs == NULL) {
1447 dev_err(&dev->dev, "cannot remap registers\n");
1448 ret = -EIO;
1449 goto err_claim;
1450 }
1451
1452 return sm501_init_dev(sm);
1453
1454 err_claim:
1455 release_resource(sm->regs_claim);
1456 kfree(sm->regs_claim);
1457 err_res:
1458 kfree(sm);
1459 err1:
1460 return ret;
1461
1462 }
1463
1464 #ifdef CONFIG_PM
1465
1466 /* power management support */
1467
1468 static void sm501_set_power(struct sm501_devdata *sm, int on)
1469 {
1470 struct sm501_platdata *pd = sm->platdata;
1471
1472 if (pd == NULL)
1473 return;
1474
1475 if (pd->get_power) {
1476 if (pd->get_power(sm->dev) == on) {
1477 dev_dbg(sm->dev, "is already %d\n", on);
1478 return;
1479 }
1480 }
1481
1482 if (pd->set_power) {
1483 dev_dbg(sm->dev, "setting power to %d\n", on);
1484
1485 pd->set_power(sm->dev, on);
1486 sm501_mdelay(sm, 10);
1487 }
1488 }
1489
1490 static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
1491 {
1492 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1493
1494 sm->in_suspend = 1;
1495 sm->pm_misc = readl(sm->regs + SM501_MISC_CONTROL);
1496
1497 sm501_dump_regs(sm);
1498
1499 if (sm->platdata) {
1500 if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF)
1501 sm501_set_power(sm, 0);
1502 }
1503
1504 return 0;
1505 }
1506
1507 static int sm501_plat_resume(struct platform_device *pdev)
1508 {
1509 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1510
1511 sm501_set_power(sm, 1);
1512
1513 sm501_dump_regs(sm);
1514 sm501_dump_gate(sm);
1515 sm501_dump_clk(sm);
1516
1517 /* check to see if we are in the same state as when suspended */
1518
1519 if (readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) {
1520 dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n");
1521 writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL);
1522
1523 /* our suspend causes the controller state to change,
1524 * either by something attempting setup, power loss,
1525 * or an external reset event on power change */
1526
1527 if (sm->platdata && sm->platdata->init) {
1528 sm501_init_regs(sm, sm->platdata->init);
1529 }
1530 }
1531
1532 /* dump our state from resume */
1533
1534 sm501_dump_regs(sm);
1535 sm501_dump_clk(sm);
1536
1537 sm->in_suspend = 0;
1538
1539 return 0;
1540 }
1541 #else
1542 #define sm501_plat_suspend NULL
1543 #define sm501_plat_resume NULL
1544 #endif
1545
1546 /* Initialisation data for PCI devices */
1547
1548 static struct sm501_initdata sm501_pci_initdata = {
1549 .gpio_high = {
1550 .set = 0x3F000000, /* 24bit panel */
1551 .mask = 0x0,
1552 },
1553 .misc_timing = {
1554 .set = 0x010100, /* SDRAM timing */
1555 .mask = 0x1F1F00,
1556 },
1557 .misc_control = {
1558 .set = SM501_MISC_PNL_24BIT,
1559 .mask = 0,
1560 },
1561
1562 .devices = SM501_USE_ALL,
1563
1564 /* Errata AB-3 says that 72MHz is the fastest available
1565 * for 33MHZ PCI with proper bus-mastering operation */
1566
1567 .mclk = 72 * MHZ,
1568 .m1xclk = 144 * MHZ,
1569 };
1570
1571 static struct sm501_platdata_fbsub sm501_pdata_fbsub = {
1572 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1573 SM501FB_FLAG_USE_HWCURSOR |
1574 SM501FB_FLAG_USE_HWACCEL |
1575 SM501FB_FLAG_DISABLE_AT_EXIT),
1576 };
1577
1578 static struct sm501_platdata_fb sm501_fb_pdata = {
1579 .fb_route = SM501_FB_OWN,
1580 .fb_crt = &sm501_pdata_fbsub,
1581 .fb_pnl = &sm501_pdata_fbsub,
1582 };
1583
1584 static struct sm501_platdata sm501_pci_platdata = {
1585 .init = &sm501_pci_initdata,
1586 .fb = &sm501_fb_pdata,
1587 .gpio_base = -1,
1588 };
1589
1590 static int __devinit sm501_pci_probe(struct pci_dev *dev,
1591 const struct pci_device_id *id)
1592 {
1593 struct sm501_devdata *sm;
1594 int err;
1595
1596 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1597 if (sm == NULL) {
1598 dev_err(&dev->dev, "no memory for device data\n");
1599 err = -ENOMEM;
1600 goto err1;
1601 }
1602
1603 /* set a default set of platform data */
1604 dev->dev.platform_data = sm->platdata = &sm501_pci_platdata;
1605
1606 /* set a hopefully unique id for our child platform devices */
1607 sm->pdev_id = 32 + dev->devfn;
1608
1609 pci_set_drvdata(dev, sm);
1610
1611 err = pci_enable_device(dev);
1612 if (err) {
1613 dev_err(&dev->dev, "cannot enable device\n");
1614 goto err2;
1615 }
1616
1617 sm->dev = &dev->dev;
1618 sm->irq = dev->irq;
1619
1620 #ifdef __BIG_ENDIAN
1621 /* if the system is big-endian, we most probably have a
1622 * translation in the IO layer making the PCI bus little endian
1623 * so make the framebuffer swapped pixels */
1624
1625 sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN;
1626 #endif
1627
1628 /* check our resources */
1629
1630 if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) {
1631 dev_err(&dev->dev, "region #0 is not memory?\n");
1632 err = -EINVAL;
1633 goto err3;
1634 }
1635
1636 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) {
1637 dev_err(&dev->dev, "region #1 is not memory?\n");
1638 err = -EINVAL;
1639 goto err3;
1640 }
1641
1642 /* make our resources ready for sharing */
1643
1644 sm->io_res = &dev->resource[1];
1645 sm->mem_res = &dev->resource[0];
1646
1647 sm->regs_claim = request_mem_region(sm->io_res->start,
1648 0x100, "sm501");
1649 if (sm->regs_claim == NULL) {
1650 dev_err(&dev->dev, "cannot claim registers\n");
1651 err= -EBUSY;
1652 goto err3;
1653 }
1654
1655 sm->regs = pci_ioremap_bar(dev, 1);
1656
1657 if (sm->regs == NULL) {
1658 dev_err(&dev->dev, "cannot remap registers\n");
1659 err = -EIO;
1660 goto err4;
1661 }
1662
1663 sm501_init_dev(sm);
1664 return 0;
1665
1666 err4:
1667 release_resource(sm->regs_claim);
1668 kfree(sm->regs_claim);
1669 err3:
1670 pci_disable_device(dev);
1671 err2:
1672 pci_set_drvdata(dev, NULL);
1673 kfree(sm);
1674 err1:
1675 return err;
1676 }
1677
1678 static void sm501_remove_sub(struct sm501_devdata *sm,
1679 struct sm501_device *smdev)
1680 {
1681 list_del(&smdev->list);
1682 platform_device_unregister(&smdev->pdev);
1683 }
1684
1685 static void sm501_dev_remove(struct sm501_devdata *sm)
1686 {
1687 struct sm501_device *smdev, *tmp;
1688
1689 list_for_each_entry_safe(smdev, tmp, &sm->devices, list)
1690 sm501_remove_sub(sm, smdev);
1691
1692 device_remove_file(sm->dev, &dev_attr_dbg_regs);
1693
1694 sm501_gpio_remove(sm);
1695 }
1696
1697 static void __devexit sm501_pci_remove(struct pci_dev *dev)
1698 {
1699 struct sm501_devdata *sm = pci_get_drvdata(dev);
1700
1701 sm501_dev_remove(sm);
1702 iounmap(sm->regs);
1703
1704 release_resource(sm->regs_claim);
1705 kfree(sm->regs_claim);
1706
1707 pci_set_drvdata(dev, NULL);
1708 pci_disable_device(dev);
1709 }
1710
1711 static int sm501_plat_remove(struct platform_device *dev)
1712 {
1713 struct sm501_devdata *sm = platform_get_drvdata(dev);
1714
1715 sm501_dev_remove(sm);
1716 iounmap(sm->regs);
1717
1718 release_resource(sm->regs_claim);
1719 kfree(sm->regs_claim);
1720
1721 return 0;
1722 }
1723
1724 static struct pci_device_id sm501_pci_tbl[] = {
1725 { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1726 { 0, },
1727 };
1728
1729 MODULE_DEVICE_TABLE(pci, sm501_pci_tbl);
1730
1731 static struct pci_driver sm501_pci_driver = {
1732 .name = "sm501",
1733 .id_table = sm501_pci_tbl,
1734 .probe = sm501_pci_probe,
1735 .remove = __devexit_p(sm501_pci_remove),
1736 };
1737
1738 MODULE_ALIAS("platform:sm501");
1739
1740 static struct platform_driver sm501_plat_driver = {
1741 .driver = {
1742 .name = "sm501",
1743 .owner = THIS_MODULE,
1744 },
1745 .probe = sm501_plat_probe,
1746 .remove = sm501_plat_remove,
1747 .suspend = sm501_plat_suspend,
1748 .resume = sm501_plat_resume,
1749 };
1750
1751 static int __init sm501_base_init(void)
1752 {
1753 platform_driver_register(&sm501_plat_driver);
1754 return pci_register_driver(&sm501_pci_driver);
1755 }
1756
1757 static void __exit sm501_base_exit(void)
1758 {
1759 platform_driver_unregister(&sm501_plat_driver);
1760 pci_unregister_driver(&sm501_pci_driver);
1761 }
1762
1763 module_init(sm501_base_init);
1764 module_exit(sm501_base_exit);
1765
1766 MODULE_DESCRIPTION("SM501 Core Driver");
1767 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders");
1768 MODULE_LICENSE("GPL v2");
Support for the Chinese Samsung S3C2440 based development boards