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Merge commit 'v2.6.32.11' into mini2440-stable-v2.6.32
[linux-2.6/mini2440.git] / drivers / mfd / tc6393xb.c
blob1429a7341a9a976481b2ba11ad29258ba2cc6ac2
1 /*
2 * Toshiba TC6393XB SoC support
3 *
4 * Copyright(c) 2005-2006 Chris Humbert
5 * Copyright(c) 2005 Dirk Opfer
6 * Copyright(c) 2005 Ian Molton <spyro@f2s.com>
7 * Copyright(c) 2007 Dmitry Baryshkov
8 *
9 * Based on code written by Sharp/Lineo for 2.4 kernels
10 * Based on locomo.c
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/io.h>
20 #include <linux/irq.h>
21 #include <linux/platform_device.h>
22 #include <linux/clk.h>
23 #include <linux/err.h>
24 #include <linux/mfd/core.h>
25 #include <linux/mfd/tmio.h>
26 #include <linux/mfd/tc6393xb.h>
27 #include <linux/gpio.h>
28
29 #define SCR_REVID 0x08 /* b Revision ID */
30 #define SCR_ISR 0x50 /* b Interrupt Status */
31 #define SCR_IMR 0x52 /* b Interrupt Mask */
32 #define SCR_IRR 0x54 /* b Interrupt Routing */
33 #define SCR_GPER 0x60 /* w GP Enable */
34 #define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */
35 #define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */
36 #define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */
37 #define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */
38 #define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */
39 #define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */
40 #define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */
41 #define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */
42 #define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */
43 #define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */
44 #define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */
45 #define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */
46 #define SCR_CCR 0x98 /* w Clock Control */
47 #define SCR_PLL2CR 0x9a /* w PLL2 Control */
48 #define SCR_PLL1CR 0x9c /* l PLL1 Control */
49 #define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */
50 #define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */
51 #define SCR_FER 0xe0 /* b Function Enable */
52 #define SCR_MCR 0xe4 /* w Mode Control */
53 #define SCR_CONFIG 0xfc /* b Configuration Control */
54 #define SCR_DEBUG 0xff /* b Debug */
55
56 #define SCR_CCR_CK32K BIT(0)
57 #define SCR_CCR_USBCK BIT(1)
58 #define SCR_CCR_UNK1 BIT(4)
59 #define SCR_CCR_MCLK_MASK (7 << 8)
60 #define SCR_CCR_MCLK_OFF (0 << 8)
61 #define SCR_CCR_MCLK_12 (1 << 8)
62 #define SCR_CCR_MCLK_24 (2 << 8)
63 #define SCR_CCR_MCLK_48 (3 << 8)
64 #define SCR_CCR_HCLK_MASK (3 << 12)
65 #define SCR_CCR_HCLK_24 (0 << 12)
66 #define SCR_CCR_HCLK_48 (1 << 12)
67
68 #define SCR_FER_USBEN BIT(0) /* USB host enable */
69 #define SCR_FER_LCDCVEN BIT(1) /* polysilicon TFT enable */
70 #define SCR_FER_SLCDEN BIT(2) /* SLCD enable */
71
72 #define SCR_MCR_RDY_MASK (3 << 0)
73 #define SCR_MCR_RDY_OPENDRAIN (0 << 0)
74 #define SCR_MCR_RDY_TRISTATE (1 << 0)
75 #define SCR_MCR_RDY_PUSHPULL (2 << 0)
76 #define SCR_MCR_RDY_UNK BIT(2)
77 #define SCR_MCR_RDY_EN BIT(3)
78 #define SCR_MCR_INT_MASK (3 << 4)
79 #define SCR_MCR_INT_OPENDRAIN (0 << 4)
80 #define SCR_MCR_INT_TRISTATE (1 << 4)
81 #define SCR_MCR_INT_PUSHPULL (2 << 4)
82 #define SCR_MCR_INT_UNK BIT(6)
83 #define SCR_MCR_INT_EN BIT(7)
84 /* bits 8 - 16 are unknown */
85
86 #define TC_GPIO_BIT(i) (1 << (i & 0x7))
87
88 /*--------------------------------------------------------------------------*/
89
90 struct tc6393xb {
91 void __iomem *scr;
92
93 struct gpio_chip gpio;
94
95 struct clk *clk; /* 3,6 Mhz */
96
97 spinlock_t lock; /* protects RMW cycles */
98
99 struct {
100 u8 fer;
101 u16 ccr;
102 u8 gpi_bcr[3];
103 u8 gpo_dsr[3];
104 u8 gpo_doecr[3];
105 } suspend_state;
106
107 struct resource rscr;
108 struct resource *iomem;
109 int irq;
110 int irq_base;
111 };
112
113 enum {
114 TC6393XB_CELL_NAND,
115 TC6393XB_CELL_MMC,
116 TC6393XB_CELL_OHCI,
117 TC6393XB_CELL_FB,
118 };
119
120 /*--------------------------------------------------------------------------*/
121
122 static int tc6393xb_nand_enable(struct platform_device *nand)
123 {
124 struct platform_device *dev = to_platform_device(nand->dev.parent);
125 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
126 unsigned long flags;
127
128 spin_lock_irqsave(&tc6393xb->lock, flags);
129
130 /* SMD buffer on */
131 dev_dbg(&dev->dev, "SMD buffer on\n");
132 tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
133
134 spin_unlock_irqrestore(&tc6393xb->lock, flags);
135
136 return 0;
137 }
138
139 static struct tmio_mmc_data tc6393xb_mmc_data = {
140 .hclk = 24000000,
141 };
142
143 static struct resource __devinitdata tc6393xb_nand_resources[] = {
144 {
145 .start = 0x1000,
146 .end = 0x1007,
147 .flags = IORESOURCE_MEM,
148 },
149 {
150 .start = 0x0100,
151 .end = 0x01ff,
152 .flags = IORESOURCE_MEM,
153 },
154 {
155 .start = IRQ_TC6393_NAND,
156 .end = IRQ_TC6393_NAND,
157 .flags = IORESOURCE_IRQ,
158 },
159 };
160
161 static struct resource __devinitdata tc6393xb_mmc_resources[] = {
162 {
163 .start = 0x800,
164 .end = 0x9ff,
165 .flags = IORESOURCE_MEM,
166 },
167 {
168 .start = 0x200,
169 .end = 0x2ff,
170 .flags = IORESOURCE_MEM,
171 },
172 {
173 .start = IRQ_TC6393_MMC,
174 .end = IRQ_TC6393_MMC,
175 .flags = IORESOURCE_IRQ,
176 },
177 };
178
179 static const struct resource tc6393xb_ohci_resources[] = {
180 {
181 .start = 0x3000,
182 .end = 0x31ff,
183 .flags = IORESOURCE_MEM,
184 },
185 {
186 .start = 0x0300,
187 .end = 0x03ff,
188 .flags = IORESOURCE_MEM,
189 },
190 {
191 .start = 0x010000,
192 .end = 0x017fff,
193 .flags = IORESOURCE_MEM,
194 },
195 {
196 .start = 0x018000,
197 .end = 0x01ffff,
198 .flags = IORESOURCE_MEM,
199 },
200 {
201 .start = IRQ_TC6393_OHCI,
202 .end = IRQ_TC6393_OHCI,
203 .flags = IORESOURCE_IRQ,
204 },
205 };
206
207 static struct resource __devinitdata tc6393xb_fb_resources[] = {
208 {
209 .start = 0x5000,
210 .end = 0x51ff,
211 .flags = IORESOURCE_MEM,
212 },
213 {
214 .start = 0x0500,
215 .end = 0x05ff,
216 .flags = IORESOURCE_MEM,
217 },
218 {
219 .start = 0x100000,
220 .end = 0x1fffff,
221 .flags = IORESOURCE_MEM,
222 },
223 {
224 .start = IRQ_TC6393_FB,
225 .end = IRQ_TC6393_FB,
226 .flags = IORESOURCE_IRQ,
227 },
228 };
229
230 static int tc6393xb_ohci_enable(struct platform_device *dev)
231 {
232 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
233 unsigned long flags;
234 u16 ccr;
235 u8 fer;
236
237 spin_lock_irqsave(&tc6393xb->lock, flags);
238
239 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
240 ccr |= SCR_CCR_USBCK;
241 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
242
243 fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
244 fer |= SCR_FER_USBEN;
245 tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
246
247 spin_unlock_irqrestore(&tc6393xb->lock, flags);
248
249 return 0;
250 }
251
252 static int tc6393xb_ohci_disable(struct platform_device *dev)
253 {
254 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
255 unsigned long flags;
256 u16 ccr;
257 u8 fer;
258
259 spin_lock_irqsave(&tc6393xb->lock, flags);
260
261 fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
262 fer &= ~SCR_FER_USBEN;
263 tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
264
265 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
266 ccr &= ~SCR_CCR_USBCK;
267 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
268
269 spin_unlock_irqrestore(&tc6393xb->lock, flags);
270
271 return 0;
272 }
273
274 static int tc6393xb_fb_enable(struct platform_device *dev)
275 {
276 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
277 unsigned long flags;
278 u16 ccr;
279
280 spin_lock_irqsave(&tc6393xb->lock, flags);
281
282 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
283 ccr &= ~SCR_CCR_MCLK_MASK;
284 ccr |= SCR_CCR_MCLK_48;
285 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
286
287 spin_unlock_irqrestore(&tc6393xb->lock, flags);
288
289 return 0;
290 }
291
292 static int tc6393xb_fb_disable(struct platform_device *dev)
293 {
294 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
295 unsigned long flags;
296 u16 ccr;
297
298 spin_lock_irqsave(&tc6393xb->lock, flags);
299
300 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
301 ccr &= ~SCR_CCR_MCLK_MASK;
302 ccr |= SCR_CCR_MCLK_OFF;
303 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
304
305 spin_unlock_irqrestore(&tc6393xb->lock, flags);
306
307 return 0;
308 }
309
310 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
311 {
312 struct platform_device *dev = to_platform_device(fb->dev.parent);
313 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
314 u8 fer;
315 unsigned long flags;
316
317 spin_lock_irqsave(&tc6393xb->lock, flags);
318
319 fer = ioread8(tc6393xb->scr + SCR_FER);
320 if (on)
321 fer |= SCR_FER_SLCDEN;
322 else
323 fer &= ~SCR_FER_SLCDEN;
324 iowrite8(fer, tc6393xb->scr + SCR_FER);
325
326 spin_unlock_irqrestore(&tc6393xb->lock, flags);
327
328 return 0;
329 }
330 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
331
332 int tc6393xb_lcd_mode(struct platform_device *fb,
333 const struct fb_videomode *mode) {
334 struct platform_device *dev = to_platform_device(fb->dev.parent);
335 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
336 unsigned long flags;
337
338 spin_lock_irqsave(&tc6393xb->lock, flags);
339
340 iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
341 iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
342
343 spin_unlock_irqrestore(&tc6393xb->lock, flags);
344
345 return 0;
346 }
347 EXPORT_SYMBOL(tc6393xb_lcd_mode);
348
349 static struct mfd_cell __devinitdata tc6393xb_cells[] = {
350 [TC6393XB_CELL_NAND] = {
351 .name = "tmio-nand",
352 .enable = tc6393xb_nand_enable,
353 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
354 .resources = tc6393xb_nand_resources,
355 },
356 [TC6393XB_CELL_MMC] = {
357 .name = "tmio-mmc",
358 .driver_data = &tc6393xb_mmc_data,
359 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
360 .resources = tc6393xb_mmc_resources,
361 },
362 [TC6393XB_CELL_OHCI] = {
363 .name = "tmio-ohci",
364 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
365 .resources = tc6393xb_ohci_resources,
366 .enable = tc6393xb_ohci_enable,
367 .suspend = tc6393xb_ohci_disable,
368 .resume = tc6393xb_ohci_enable,
369 .disable = tc6393xb_ohci_disable,
370 },
371 [TC6393XB_CELL_FB] = {
372 .name = "tmio-fb",
373 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
374 .resources = tc6393xb_fb_resources,
375 .enable = tc6393xb_fb_enable,
376 .suspend = tc6393xb_fb_disable,
377 .resume = tc6393xb_fb_enable,
378 .disable = tc6393xb_fb_disable,
379 },
380 };
381
382 /*--------------------------------------------------------------------------*/
383
384 static int tc6393xb_gpio_get(struct gpio_chip *chip,
385 unsigned offset)
386 {
387 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
388
389 /* XXX: does dsr also represent inputs? */
390 return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
391 & TC_GPIO_BIT(offset);
392 }
393
394 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
395 unsigned offset, int value)
396 {
397 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
398 u8 dsr;
399
400 dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
401 if (value)
402 dsr |= TC_GPIO_BIT(offset);
403 else
404 dsr &= ~TC_GPIO_BIT(offset);
405
406 tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
407 }
408
409 static void tc6393xb_gpio_set(struct gpio_chip *chip,
410 unsigned offset, int value)
411 {
412 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
413 unsigned long flags;
414
415 spin_lock_irqsave(&tc6393xb->lock, flags);
416
417 __tc6393xb_gpio_set(chip, offset, value);
418
419 spin_unlock_irqrestore(&tc6393xb->lock, flags);
420 }
421
422 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
423 unsigned offset)
424 {
425 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
426 unsigned long flags;
427 u8 doecr;
428
429 spin_lock_irqsave(&tc6393xb->lock, flags);
430
431 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
432 doecr &= ~TC_GPIO_BIT(offset);
433 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
434
435 spin_unlock_irqrestore(&tc6393xb->lock, flags);
436
437 return 0;
438 }
439
440 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
441 unsigned offset, int value)
442 {
443 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
444 unsigned long flags;
445 u8 doecr;
446
447 spin_lock_irqsave(&tc6393xb->lock, flags);
448
449 __tc6393xb_gpio_set(chip, offset, value);
450
451 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
452 doecr |= TC_GPIO_BIT(offset);
453 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
454
455 spin_unlock_irqrestore(&tc6393xb->lock, flags);
456
457 return 0;
458 }
459
460 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
461 {
462 tc6393xb->gpio.label = "tc6393xb";
463 tc6393xb->gpio.base = gpio_base;
464 tc6393xb->gpio.ngpio = 16;
465 tc6393xb->gpio.set = tc6393xb_gpio_set;
466 tc6393xb->gpio.get = tc6393xb_gpio_get;
467 tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
468 tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
469
470 return gpiochip_add(&tc6393xb->gpio);
471 }
472
473 /*--------------------------------------------------------------------------*/
474
475 static void
476 tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
477 {
478 struct tc6393xb *tc6393xb = get_irq_data(irq);
479 unsigned int isr;
480 unsigned int i, irq_base;
481
482 irq_base = tc6393xb->irq_base;
483
484 while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
485 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
486 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
487 if (isr & (1 << i))
488 generic_handle_irq(irq_base + i);
489 }
490 }
491
492 static void tc6393xb_irq_ack(unsigned int irq)
493 {
494 }
495
496 static void tc6393xb_irq_mask(unsigned int irq)
497 {
498 struct tc6393xb *tc6393xb = get_irq_chip_data(irq);
499 unsigned long flags;
500 u8 imr;
501
502 spin_lock_irqsave(&tc6393xb->lock, flags);
503 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
504 imr |= 1 << (irq - tc6393xb->irq_base);
505 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
506 spin_unlock_irqrestore(&tc6393xb->lock, flags);
507 }
508
509 static void tc6393xb_irq_unmask(unsigned int irq)
510 {
511 struct tc6393xb *tc6393xb = get_irq_chip_data(irq);
512 unsigned long flags;
513 u8 imr;
514
515 spin_lock_irqsave(&tc6393xb->lock, flags);
516 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
517 imr &= ~(1 << (irq - tc6393xb->irq_base));
518 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
519 spin_unlock_irqrestore(&tc6393xb->lock, flags);
520 }
521
522 static struct irq_chip tc6393xb_chip = {
523 .name = "tc6393xb",
524 .ack = tc6393xb_irq_ack,
525 .mask = tc6393xb_irq_mask,
526 .unmask = tc6393xb_irq_unmask,
527 };
528
529 static void tc6393xb_attach_irq(struct platform_device *dev)
530 {
531 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
532 unsigned int irq, irq_base;
533
534 irq_base = tc6393xb->irq_base;
535
536 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
537 set_irq_chip(irq, &tc6393xb_chip);
538 set_irq_chip_data(irq, tc6393xb);
539 set_irq_handler(irq, handle_edge_irq);
540 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
541 }
542
543 set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
544 set_irq_data(tc6393xb->irq, tc6393xb);
545 set_irq_chained_handler(tc6393xb->irq, tc6393xb_irq);
546 }
547
548 static void tc6393xb_detach_irq(struct platform_device *dev)
549 {
550 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
551 unsigned int irq, irq_base;
552
553 set_irq_chained_handler(tc6393xb->irq, NULL);
554 set_irq_data(tc6393xb->irq, NULL);
555
556 irq_base = tc6393xb->irq_base;
557
558 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
559 set_irq_flags(irq, 0);
560 set_irq_chip(irq, NULL);
561 set_irq_chip_data(irq, NULL);
562 }
563 }
564
565 /*--------------------------------------------------------------------------*/
566
567 static int __devinit tc6393xb_probe(struct platform_device *dev)
568 {
569 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
570 struct tc6393xb *tc6393xb;
571 struct resource *iomem, *rscr;
572 int ret, temp;
573
574 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
575 if (!iomem)
576 return -EINVAL;
577
578 tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
579 if (!tc6393xb) {
580 ret = -ENOMEM;
581 goto err_kzalloc;
582 }
583
584 spin_lock_init(&tc6393xb->lock);
585
586 platform_set_drvdata(dev, tc6393xb);
587
588 ret = platform_get_irq(dev, 0);
589 if (ret >= 0)
590 tc6393xb->irq = ret;
591 else
592 goto err_noirq;
593
594 tc6393xb->iomem = iomem;
595 tc6393xb->irq_base = tcpd->irq_base;
596
597 tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
598 if (IS_ERR(tc6393xb->clk)) {
599 ret = PTR_ERR(tc6393xb->clk);
600 goto err_clk_get;
601 }
602
603 rscr = &tc6393xb->rscr;
604 rscr->name = "tc6393xb-core";
605 rscr->start = iomem->start;
606 rscr->end = iomem->start + 0xff;
607 rscr->flags = IORESOURCE_MEM;
608
609 ret = request_resource(iomem, rscr);
610 if (ret)
611 goto err_request_scr;
612
613 tc6393xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
614 if (!tc6393xb->scr) {
615 ret = -ENOMEM;
616 goto err_ioremap;
617 }
618
619 ret = clk_enable(tc6393xb->clk);
620 if (ret)
621 goto err_clk_enable;
622
623 ret = tcpd->enable(dev);
624 if (ret)
625 goto err_enable;
626
627 iowrite8(0, tc6393xb->scr + SCR_FER);
628 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
629 iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
630 tc6393xb->scr + SCR_CCR);
631 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
632 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
633 BIT(15), tc6393xb->scr + SCR_MCR);
634 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
635 iowrite8(0, tc6393xb->scr + SCR_IRR);
636 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
637
638 printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
639 tmio_ioread8(tc6393xb->scr + SCR_REVID),
640 (unsigned long) iomem->start, tc6393xb->irq);
641
642 tc6393xb->gpio.base = -1;
643
644 if (tcpd->gpio_base >= 0) {
645 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
646 if (ret)
647 goto err_gpio_add;
648 }
649
650 tc6393xb_attach_irq(dev);
651
652 if (tcpd->setup) {
653 ret = tcpd->setup(dev);
654 if (ret)
655 goto err_setup;
656 }
657
658 tc6393xb_cells[TC6393XB_CELL_NAND].driver_data = tcpd->nand_data;
659 tc6393xb_cells[TC6393XB_CELL_NAND].platform_data =
660 &tc6393xb_cells[TC6393XB_CELL_NAND];
661 tc6393xb_cells[TC6393XB_CELL_NAND].data_size =
662 sizeof(tc6393xb_cells[TC6393XB_CELL_NAND]);
663
664 tc6393xb_cells[TC6393XB_CELL_MMC].platform_data =
665 &tc6393xb_cells[TC6393XB_CELL_MMC];
666 tc6393xb_cells[TC6393XB_CELL_MMC].data_size =
667 sizeof(tc6393xb_cells[TC6393XB_CELL_MMC]);
668
669 tc6393xb_cells[TC6393XB_CELL_OHCI].platform_data =
670 &tc6393xb_cells[TC6393XB_CELL_OHCI];
671 tc6393xb_cells[TC6393XB_CELL_OHCI].data_size =
672 sizeof(tc6393xb_cells[TC6393XB_CELL_OHCI]);
673
674 tc6393xb_cells[TC6393XB_CELL_FB].driver_data = tcpd->fb_data;
675 tc6393xb_cells[TC6393XB_CELL_FB].platform_data =
676 &tc6393xb_cells[TC6393XB_CELL_FB];
677 tc6393xb_cells[TC6393XB_CELL_FB].data_size =
678 sizeof(tc6393xb_cells[TC6393XB_CELL_FB]);
679
680 ret = mfd_add_devices(&dev->dev, dev->id,
681 tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
682 iomem, tcpd->irq_base);
683
684 if (!ret)
685 return 0;
686
687 if (tcpd->teardown)
688 tcpd->teardown(dev);
689
690 err_setup:
691 tc6393xb_detach_irq(dev);
692
693 err_gpio_add:
694 if (tc6393xb->gpio.base != -1)
695 temp = gpiochip_remove(&tc6393xb->gpio);
696 tcpd->disable(dev);
697 err_clk_enable:
698 clk_disable(tc6393xb->clk);
699 err_enable:
700 iounmap(tc6393xb->scr);
701 err_ioremap:
702 release_resource(&tc6393xb->rscr);
703 err_request_scr:
704 clk_put(tc6393xb->clk);
705 err_noirq:
706 err_clk_get:
707 kfree(tc6393xb);
708 err_kzalloc:
709 return ret;
710 }
711
712 static int __devexit tc6393xb_remove(struct platform_device *dev)
713 {
714 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
715 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
716 int ret;
717
718 mfd_remove_devices(&dev->dev);
719
720 if (tcpd->teardown)
721 tcpd->teardown(dev);
722
723 tc6393xb_detach_irq(dev);
724
725 if (tc6393xb->gpio.base != -1) {
726 ret = gpiochip_remove(&tc6393xb->gpio);
727 if (ret) {
728 dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
729 return ret;
730 }
731 }
732
733 ret = tcpd->disable(dev);
734 clk_disable(tc6393xb->clk);
735 iounmap(tc6393xb->scr);
736 release_resource(&tc6393xb->rscr);
737 platform_set_drvdata(dev, NULL);
738 clk_put(tc6393xb->clk);
739 kfree(tc6393xb);
740
741 return ret;
742 }
743
744 #ifdef CONFIG_PM
745 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
746 {
747 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
748 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
749 int i, ret;
750
751 tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
752 tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
753
754 for (i = 0; i < 3; i++) {
755 tc6393xb->suspend_state.gpo_dsr[i] =
756 ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
757 tc6393xb->suspend_state.gpo_doecr[i] =
758 ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
759 tc6393xb->suspend_state.gpi_bcr[i] =
760 ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
761 }
762 ret = tcpd->suspend(dev);
763 clk_disable(tc6393xb->clk);
764
765 return ret;
766 }
767
768 static int tc6393xb_resume(struct platform_device *dev)
769 {
770 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
771 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
772 int ret;
773 int i;
774
775 clk_enable(tc6393xb->clk);
776
777 ret = tcpd->resume(dev);
778 if (ret)
779 return ret;
780
781 if (!tcpd->resume_restore)
782 return 0;
783
784 iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER);
785 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
786 iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR);
787 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
788 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
789 BIT(15), tc6393xb->scr + SCR_MCR);
790 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
791 iowrite8(0, tc6393xb->scr + SCR_IRR);
792 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
793
794 for (i = 0; i < 3; i++) {
795 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
796 tc6393xb->scr + SCR_GPO_DSR(i));
797 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
798 tc6393xb->scr + SCR_GPO_DOECR(i));
799 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
800 tc6393xb->scr + SCR_GPI_BCR(i));
801 }
802
803 return 0;
804 }
805 #else
806 #define tc6393xb_suspend NULL
807 #define tc6393xb_resume NULL
808 #endif
809
810 static struct platform_driver tc6393xb_driver = {
811 .probe = tc6393xb_probe,
812 .remove = __devexit_p(tc6393xb_remove),
813 .suspend = tc6393xb_suspend,
814 .resume = tc6393xb_resume,
815
816 .driver = {
817 .name = "tc6393xb",
818 .owner = THIS_MODULE,
819 },
820 };
821
822 static int __init tc6393xb_init(void)
823 {
824 return platform_driver_register(&tc6393xb_driver);
825 }
826
827 static void __exit tc6393xb_exit(void)
828 {
829 platform_driver_unregister(&tc6393xb_driver);
830 }
831
832 subsys_initcall(tc6393xb_init);
833 module_exit(tc6393xb_exit);
834
835 MODULE_LICENSE("GPL v2");
836 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
837 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
838 MODULE_ALIAS("platform:tc6393xb");
Support for the Chinese Samsung S3C2440 based development boards