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 #include <linux/slab.h>
29
30 #define SCR_REVID 0x08 /* b Revision ID */
31 #define SCR_ISR 0x50 /* b Interrupt Status */
32 #define SCR_IMR 0x52 /* b Interrupt Mask */
33 #define SCR_IRR 0x54 /* b Interrupt Routing */
34 #define SCR_GPER 0x60 /* w GP Enable */
35 #define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */
36 #define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */
37 #define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */
38 #define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */
39 #define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */
40 #define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */
41 #define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */
42 #define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */
43 #define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */
44 #define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */
45 #define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */
46 #define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */
47 #define SCR_CCR 0x98 /* w Clock Control */
48 #define SCR_PLL2CR 0x9a /* w PLL2 Control */
49 #define SCR_PLL1CR 0x9c /* l PLL1 Control */
50 #define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */
51 #define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */
52 #define SCR_FER 0xe0 /* b Function Enable */
53 #define SCR_MCR 0xe4 /* w Mode Control */
54 #define SCR_CONFIG 0xfc /* b Configuration Control */
55 #define SCR_DEBUG 0xff /* b Debug */
56
57 #define SCR_CCR_CK32K BIT(0)
58 #define SCR_CCR_USBCK BIT(1)
59 #define SCR_CCR_UNK1 BIT(4)
60 #define SCR_CCR_MCLK_MASK (7 << 8)
61 #define SCR_CCR_MCLK_OFF (0 << 8)
62 #define SCR_CCR_MCLK_12 (1 << 8)
63 #define SCR_CCR_MCLK_24 (2 << 8)
64 #define SCR_CCR_MCLK_48 (3 << 8)
65 #define SCR_CCR_HCLK_MASK (3 << 12)
66 #define SCR_CCR_HCLK_24 (0 << 12)
67 #define SCR_CCR_HCLK_48 (1 << 12)
68
69 #define SCR_FER_USBEN BIT(0) /* USB host enable */
70 #define SCR_FER_LCDCVEN BIT(1) /* polysilicon TFT enable */
71 #define SCR_FER_SLCDEN BIT(2) /* SLCD enable */
72
73 #define SCR_MCR_RDY_MASK (3 << 0)
74 #define SCR_MCR_RDY_OPENDRAIN (0 << 0)
75 #define SCR_MCR_RDY_TRISTATE (1 << 0)
76 #define SCR_MCR_RDY_PUSHPULL (2 << 0)
77 #define SCR_MCR_RDY_UNK BIT(2)
78 #define SCR_MCR_RDY_EN BIT(3)
79 #define SCR_MCR_INT_MASK (3 << 4)
80 #define SCR_MCR_INT_OPENDRAIN (0 << 4)
81 #define SCR_MCR_INT_TRISTATE (1 << 4)
82 #define SCR_MCR_INT_PUSHPULL (2 << 4)
83 #define SCR_MCR_INT_UNK BIT(6)
84 #define SCR_MCR_INT_EN BIT(7)
85 /* bits 8 - 16 are unknown */
86
87 #define TC_GPIO_BIT(i) (1 << (i & 0x7))
88
89 /*--------------------------------------------------------------------------*/
90
91 struct tc6393xb {
92 void __iomem *scr;
93
94 struct gpio_chip gpio;
95
96 struct clk *clk; /* 3,6 Mhz */
97
98 spinlock_t lock; /* protects RMW cycles */
99
100 struct {
101 u8 fer;
102 u16 ccr;
103 u8 gpi_bcr[3];
104 u8 gpo_dsr[3];
105 u8 gpo_doecr[3];
106 } suspend_state;
107
108 struct resource rscr;
109 struct resource *iomem;
110 int irq;
111 int irq_base;
112 };
113
114 enum {
115 TC6393XB_CELL_NAND,
116 TC6393XB_CELL_MMC,
117 TC6393XB_CELL_OHCI,
118 TC6393XB_CELL_FB,
119 };
120
121 /*--------------------------------------------------------------------------*/
122
tc6393xb_nand_enable(struct platform_device * nand)123 static int tc6393xb_nand_enable(struct platform_device *nand)
124 {
125 struct platform_device *dev = to_platform_device(nand->dev.parent);
126 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
127 unsigned long flags;
128
129 spin_lock_irqsave(&tc6393xb->lock, flags);
130
131 /* SMD buffer on */
132 dev_dbg(&dev->dev, "SMD buffer on\n");
133 tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
134
135 spin_unlock_irqrestore(&tc6393xb->lock, flags);
136
137 return 0;
138 }
139
140 static struct resource __devinitdata tc6393xb_nand_resources[] = {
141 {
142 .start = 0x1000,
143 .end = 0x1007,
144 .flags = IORESOURCE_MEM,
145 },
146 {
147 .start = 0x0100,
148 .end = 0x01ff,
149 .flags = IORESOURCE_MEM,
150 },
151 {
152 .start = IRQ_TC6393_NAND,
153 .end = IRQ_TC6393_NAND,
154 .flags = IORESOURCE_IRQ,
155 },
156 };
157
158 static struct resource tc6393xb_mmc_resources[] = {
159 {
160 .start = 0x800,
161 .end = 0x9ff,
162 .flags = IORESOURCE_MEM,
163 },
164 {
165 .start = IRQ_TC6393_MMC,
166 .end = IRQ_TC6393_MMC,
167 .flags = IORESOURCE_IRQ,
168 },
169 };
170
171 static const struct resource tc6393xb_ohci_resources[] = {
172 {
173 .start = 0x3000,
174 .end = 0x31ff,
175 .flags = IORESOURCE_MEM,
176 },
177 {
178 .start = 0x0300,
179 .end = 0x03ff,
180 .flags = IORESOURCE_MEM,
181 },
182 {
183 .start = 0x010000,
184 .end = 0x017fff,
185 .flags = IORESOURCE_MEM,
186 },
187 {
188 .start = 0x018000,
189 .end = 0x01ffff,
190 .flags = IORESOURCE_MEM,
191 },
192 {
193 .start = IRQ_TC6393_OHCI,
194 .end = IRQ_TC6393_OHCI,
195 .flags = IORESOURCE_IRQ,
196 },
197 };
198
199 static struct resource __devinitdata tc6393xb_fb_resources[] = {
200 {
201 .start = 0x5000,
202 .end = 0x51ff,
203 .flags = IORESOURCE_MEM,
204 },
205 {
206 .start = 0x0500,
207 .end = 0x05ff,
208 .flags = IORESOURCE_MEM,
209 },
210 {
211 .start = 0x100000,
212 .end = 0x1fffff,
213 .flags = IORESOURCE_MEM,
214 },
215 {
216 .start = IRQ_TC6393_FB,
217 .end = IRQ_TC6393_FB,
218 .flags = IORESOURCE_IRQ,
219 },
220 };
221
tc6393xb_ohci_enable(struct platform_device * dev)222 static int tc6393xb_ohci_enable(struct platform_device *dev)
223 {
224 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
225 unsigned long flags;
226 u16 ccr;
227 u8 fer;
228
229 spin_lock_irqsave(&tc6393xb->lock, flags);
230
231 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
232 ccr |= SCR_CCR_USBCK;
233 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
234
235 fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
236 fer |= SCR_FER_USBEN;
237 tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
238
239 spin_unlock_irqrestore(&tc6393xb->lock, flags);
240
241 return 0;
242 }
243
tc6393xb_ohci_disable(struct platform_device * dev)244 static int tc6393xb_ohci_disable(struct platform_device *dev)
245 {
246 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
247 unsigned long flags;
248 u16 ccr;
249 u8 fer;
250
251 spin_lock_irqsave(&tc6393xb->lock, flags);
252
253 fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
254 fer &= ~SCR_FER_USBEN;
255 tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
256
257 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
258 ccr &= ~SCR_CCR_USBCK;
259 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
260
261 spin_unlock_irqrestore(&tc6393xb->lock, flags);
262
263 return 0;
264 }
265
tc6393xb_fb_enable(struct platform_device * dev)266 static int tc6393xb_fb_enable(struct platform_device *dev)
267 {
268 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
269 unsigned long flags;
270 u16 ccr;
271
272 spin_lock_irqsave(&tc6393xb->lock, flags);
273
274 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
275 ccr &= ~SCR_CCR_MCLK_MASK;
276 ccr |= SCR_CCR_MCLK_48;
277 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
278
279 spin_unlock_irqrestore(&tc6393xb->lock, flags);
280
281 return 0;
282 }
283
tc6393xb_fb_disable(struct platform_device * dev)284 static int tc6393xb_fb_disable(struct platform_device *dev)
285 {
286 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
287 unsigned long flags;
288 u16 ccr;
289
290 spin_lock_irqsave(&tc6393xb->lock, flags);
291
292 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
293 ccr &= ~SCR_CCR_MCLK_MASK;
294 ccr |= SCR_CCR_MCLK_OFF;
295 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
296
297 spin_unlock_irqrestore(&tc6393xb->lock, flags);
298
299 return 0;
300 }
301
tc6393xb_lcd_set_power(struct platform_device * fb,bool on)302 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
303 {
304 struct platform_device *dev = to_platform_device(fb->dev.parent);
305 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
306 u8 fer;
307 unsigned long flags;
308
309 spin_lock_irqsave(&tc6393xb->lock, flags);
310
311 fer = ioread8(tc6393xb->scr + SCR_FER);
312 if (on)
313 fer |= SCR_FER_SLCDEN;
314 else
315 fer &= ~SCR_FER_SLCDEN;
316 iowrite8(fer, tc6393xb->scr + SCR_FER);
317
318 spin_unlock_irqrestore(&tc6393xb->lock, flags);
319
320 return 0;
321 }
322 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
323
tc6393xb_lcd_mode(struct platform_device * fb,const struct fb_videomode * mode)324 int tc6393xb_lcd_mode(struct platform_device *fb,
325 const struct fb_videomode *mode) {
326 struct platform_device *dev = to_platform_device(fb->dev.parent);
327 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
328 unsigned long flags;
329
330 spin_lock_irqsave(&tc6393xb->lock, flags);
331
332 iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
333 iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
334
335 spin_unlock_irqrestore(&tc6393xb->lock, flags);
336
337 return 0;
338 }
339 EXPORT_SYMBOL(tc6393xb_lcd_mode);
340
tc6393xb_mmc_enable(struct platform_device * mmc)341 static int tc6393xb_mmc_enable(struct platform_device *mmc)
342 {
343 struct platform_device *dev = to_platform_device(mmc->dev.parent);
344 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
345
346 tmio_core_mmc_enable(tc6393xb->scr + 0x200, 0,
347 tc6393xb_mmc_resources[0].start & 0xfffe);
348
349 return 0;
350 }
351
tc6393xb_mmc_resume(struct platform_device * mmc)352 static int tc6393xb_mmc_resume(struct platform_device *mmc)
353 {
354 struct platform_device *dev = to_platform_device(mmc->dev.parent);
355 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
356
357 tmio_core_mmc_resume(tc6393xb->scr + 0x200, 0,
358 tc6393xb_mmc_resources[0].start & 0xfffe);
359
360 return 0;
361 }
362
tc6393xb_mmc_pwr(struct platform_device * mmc,int state)363 static void tc6393xb_mmc_pwr(struct platform_device *mmc, int state)
364 {
365 struct platform_device *dev = to_platform_device(mmc->dev.parent);
366 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
367
368 tmio_core_mmc_pwr(tc6393xb->scr + 0x200, 0, state);
369 }
370
tc6393xb_mmc_clk_div(struct platform_device * mmc,int state)371 static void tc6393xb_mmc_clk_div(struct platform_device *mmc, int state)
372 {
373 struct platform_device *dev = to_platform_device(mmc->dev.parent);
374 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
375
376 tmio_core_mmc_clk_div(tc6393xb->scr + 0x200, 0, state);
377 }
378
379 static struct tmio_mmc_data tc6393xb_mmc_data = {
380 .hclk = 24000000,
381 .set_pwr = tc6393xb_mmc_pwr,
382 .set_clk_div = tc6393xb_mmc_clk_div,
383 };
384
385 static struct mfd_cell __devinitdata tc6393xb_cells[] = {
386 [TC6393XB_CELL_NAND] = {
387 .name = "tmio-nand",
388 .enable = tc6393xb_nand_enable,
389 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
390 .resources = tc6393xb_nand_resources,
391 },
392 [TC6393XB_CELL_MMC] = {
393 .name = "tmio-mmc",
394 .enable = tc6393xb_mmc_enable,
395 .resume = tc6393xb_mmc_resume,
396 .platform_data = &tc6393xb_mmc_data,
397 .pdata_size = sizeof(tc6393xb_mmc_data),
398 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
399 .resources = tc6393xb_mmc_resources,
400 },
401 [TC6393XB_CELL_OHCI] = {
402 .name = "tmio-ohci",
403 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
404 .resources = tc6393xb_ohci_resources,
405 .enable = tc6393xb_ohci_enable,
406 .suspend = tc6393xb_ohci_disable,
407 .resume = tc6393xb_ohci_enable,
408 .disable = tc6393xb_ohci_disable,
409 },
410 [TC6393XB_CELL_FB] = {
411 .name = "tmio-fb",
412 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
413 .resources = tc6393xb_fb_resources,
414 .enable = tc6393xb_fb_enable,
415 .suspend = tc6393xb_fb_disable,
416 .resume = tc6393xb_fb_enable,
417 .disable = tc6393xb_fb_disable,
418 },
419 };
420
421 /*--------------------------------------------------------------------------*/
422
tc6393xb_gpio_get(struct gpio_chip * chip,unsigned offset)423 static int tc6393xb_gpio_get(struct gpio_chip *chip,
424 unsigned offset)
425 {
426 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
427
428 /* XXX: does dsr also represent inputs? */
429 return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
430 & TC_GPIO_BIT(offset);
431 }
432
__tc6393xb_gpio_set(struct gpio_chip * chip,unsigned offset,int value)433 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
434 unsigned offset, int value)
435 {
436 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
437 u8 dsr;
438
439 dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
440 if (value)
441 dsr |= TC_GPIO_BIT(offset);
442 else
443 dsr &= ~TC_GPIO_BIT(offset);
444
445 tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
446 }
447
tc6393xb_gpio_set(struct gpio_chip * chip,unsigned offset,int value)448 static void tc6393xb_gpio_set(struct gpio_chip *chip,
449 unsigned offset, int value)
450 {
451 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
452 unsigned long flags;
453
454 spin_lock_irqsave(&tc6393xb->lock, flags);
455
456 __tc6393xb_gpio_set(chip, offset, value);
457
458 spin_unlock_irqrestore(&tc6393xb->lock, flags);
459 }
460
tc6393xb_gpio_direction_input(struct gpio_chip * chip,unsigned offset)461 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
462 unsigned offset)
463 {
464 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
465 unsigned long flags;
466 u8 doecr;
467
468 spin_lock_irqsave(&tc6393xb->lock, flags);
469
470 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
471 doecr &= ~TC_GPIO_BIT(offset);
472 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
473
474 spin_unlock_irqrestore(&tc6393xb->lock, flags);
475
476 return 0;
477 }
478
tc6393xb_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)479 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
480 unsigned offset, int value)
481 {
482 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
483 unsigned long flags;
484 u8 doecr;
485
486 spin_lock_irqsave(&tc6393xb->lock, flags);
487
488 __tc6393xb_gpio_set(chip, offset, value);
489
490 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
491 doecr |= TC_GPIO_BIT(offset);
492 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
493
494 spin_unlock_irqrestore(&tc6393xb->lock, flags);
495
496 return 0;
497 }
498
tc6393xb_register_gpio(struct tc6393xb * tc6393xb,int gpio_base)499 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
500 {
501 tc6393xb->gpio.label = "tc6393xb";
502 tc6393xb->gpio.base = gpio_base;
503 tc6393xb->gpio.ngpio = 16;
504 tc6393xb->gpio.set = tc6393xb_gpio_set;
505 tc6393xb->gpio.get = tc6393xb_gpio_get;
506 tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
507 tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
508
509 return gpiochip_add(&tc6393xb->gpio);
510 }
511
512 /*--------------------------------------------------------------------------*/
513
514 static void
tc6393xb_irq(unsigned int irq,struct irq_desc * desc)515 tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
516 {
517 struct tc6393xb *tc6393xb = irq_get_handler_data(irq);
518 unsigned int isr;
519 unsigned int i, irq_base;
520
521 irq_base = tc6393xb->irq_base;
522
523 while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
524 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
525 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
526 if (isr & (1 << i))
527 generic_handle_irq(irq_base + i);
528 }
529 }
530
tc6393xb_irq_ack(struct irq_data * data)531 static void tc6393xb_irq_ack(struct irq_data *data)
532 {
533 }
534
tc6393xb_irq_mask(struct irq_data * data)535 static void tc6393xb_irq_mask(struct irq_data *data)
536 {
537 struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
538 unsigned long flags;
539 u8 imr;
540
541 spin_lock_irqsave(&tc6393xb->lock, flags);
542 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
543 imr |= 1 << (data->irq - tc6393xb->irq_base);
544 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
545 spin_unlock_irqrestore(&tc6393xb->lock, flags);
546 }
547
tc6393xb_irq_unmask(struct irq_data * data)548 static void tc6393xb_irq_unmask(struct irq_data *data)
549 {
550 struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
551 unsigned long flags;
552 u8 imr;
553
554 spin_lock_irqsave(&tc6393xb->lock, flags);
555 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
556 imr &= ~(1 << (data->irq - tc6393xb->irq_base));
557 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
558 spin_unlock_irqrestore(&tc6393xb->lock, flags);
559 }
560
561 static struct irq_chip tc6393xb_chip = {
562 .name = "tc6393xb",
563 .irq_ack = tc6393xb_irq_ack,
564 .irq_mask = tc6393xb_irq_mask,
565 .irq_unmask = tc6393xb_irq_unmask,
566 };
567
tc6393xb_attach_irq(struct platform_device * dev)568 static void tc6393xb_attach_irq(struct platform_device *dev)
569 {
570 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
571 unsigned int irq, irq_base;
572
573 irq_base = tc6393xb->irq_base;
574
575 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
576 irq_set_chip_and_handler(irq, &tc6393xb_chip, handle_edge_irq);
577 irq_set_chip_data(irq, tc6393xb);
578 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
579 }
580
581 irq_set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
582 irq_set_handler_data(tc6393xb->irq, tc6393xb);
583 irq_set_chained_handler(tc6393xb->irq, tc6393xb_irq);
584 }
585
tc6393xb_detach_irq(struct platform_device * dev)586 static void tc6393xb_detach_irq(struct platform_device *dev)
587 {
588 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
589 unsigned int irq, irq_base;
590
591 irq_set_chained_handler(tc6393xb->irq, NULL);
592 irq_set_handler_data(tc6393xb->irq, NULL);
593
594 irq_base = tc6393xb->irq_base;
595
596 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
597 set_irq_flags(irq, 0);
598 irq_set_chip(irq, NULL);
599 irq_set_chip_data(irq, NULL);
600 }
601 }
602
603 /*--------------------------------------------------------------------------*/
604
tc6393xb_probe(struct platform_device * dev)605 static int __devinit tc6393xb_probe(struct platform_device *dev)
606 {
607 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
608 struct tc6393xb *tc6393xb;
609 struct resource *iomem, *rscr;
610 int ret, temp;
611
612 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
613 if (!iomem)
614 return -EINVAL;
615
616 tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
617 if (!tc6393xb) {
618 ret = -ENOMEM;
619 goto err_kzalloc;
620 }
621
622 spin_lock_init(&tc6393xb->lock);
623
624 platform_set_drvdata(dev, tc6393xb);
625
626 ret = platform_get_irq(dev, 0);
627 if (ret >= 0)
628 tc6393xb->irq = ret;
629 else
630 goto err_noirq;
631
632 tc6393xb->iomem = iomem;
633 tc6393xb->irq_base = tcpd->irq_base;
634
635 tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
636 if (IS_ERR(tc6393xb->clk)) {
637 ret = PTR_ERR(tc6393xb->clk);
638 goto err_clk_get;
639 }
640
641 rscr = &tc6393xb->rscr;
642 rscr->name = "tc6393xb-core";
643 rscr->start = iomem->start;
644 rscr->end = iomem->start + 0xff;
645 rscr->flags = IORESOURCE_MEM;
646
647 ret = request_resource(iomem, rscr);
648 if (ret)
649 goto err_request_scr;
650
651 tc6393xb->scr = ioremap(rscr->start, resource_size(rscr));
652 if (!tc6393xb->scr) {
653 ret = -ENOMEM;
654 goto err_ioremap;
655 }
656
657 ret = clk_enable(tc6393xb->clk);
658 if (ret)
659 goto err_clk_enable;
660
661 ret = tcpd->enable(dev);
662 if (ret)
663 goto err_enable;
664
665 iowrite8(0, tc6393xb->scr + SCR_FER);
666 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
667 iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
668 tc6393xb->scr + SCR_CCR);
669 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
670 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
671 BIT(15), tc6393xb->scr + SCR_MCR);
672 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
673 iowrite8(0, tc6393xb->scr + SCR_IRR);
674 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
675
676 printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
677 tmio_ioread8(tc6393xb->scr + SCR_REVID),
678 (unsigned long) iomem->start, tc6393xb->irq);
679
680 tc6393xb->gpio.base = -1;
681
682 if (tcpd->gpio_base >= 0) {
683 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
684 if (ret)
685 goto err_gpio_add;
686 }
687
688 tc6393xb_attach_irq(dev);
689
690 if (tcpd->setup) {
691 ret = tcpd->setup(dev);
692 if (ret)
693 goto err_setup;
694 }
695
696 tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = tcpd->nand_data;
697 tc6393xb_cells[TC6393XB_CELL_NAND].pdata_size =
698 sizeof(*tcpd->nand_data);
699 tc6393xb_cells[TC6393XB_CELL_FB].platform_data = tcpd->fb_data;
700 tc6393xb_cells[TC6393XB_CELL_FB].pdata_size = sizeof(*tcpd->fb_data);
701
702 ret = mfd_add_devices(&dev->dev, dev->id,
703 tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
704 iomem, tcpd->irq_base);
705
706 if (!ret)
707 return 0;
708
709 if (tcpd->teardown)
710 tcpd->teardown(dev);
711
712 err_setup:
713 tc6393xb_detach_irq(dev);
714
715 err_gpio_add:
716 if (tc6393xb->gpio.base != -1)
717 temp = gpiochip_remove(&tc6393xb->gpio);
718 tcpd->disable(dev);
719 err_enable:
720 clk_disable(tc6393xb->clk);
721 err_clk_enable:
722 iounmap(tc6393xb->scr);
723 err_ioremap:
724 release_resource(&tc6393xb->rscr);
725 err_request_scr:
726 clk_put(tc6393xb->clk);
727 err_noirq:
728 err_clk_get:
729 kfree(tc6393xb);
730 err_kzalloc:
731 return ret;
732 }
733
tc6393xb_remove(struct platform_device * dev)734 static int __devexit tc6393xb_remove(struct platform_device *dev)
735 {
736 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
737 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
738 int ret;
739
740 mfd_remove_devices(&dev->dev);
741
742 if (tcpd->teardown)
743 tcpd->teardown(dev);
744
745 tc6393xb_detach_irq(dev);
746
747 if (tc6393xb->gpio.base != -1) {
748 ret = gpiochip_remove(&tc6393xb->gpio);
749 if (ret) {
750 dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
751 return ret;
752 }
753 }
754
755 ret = tcpd->disable(dev);
756 clk_disable(tc6393xb->clk);
757 iounmap(tc6393xb->scr);
758 release_resource(&tc6393xb->rscr);
759 platform_set_drvdata(dev, NULL);
760 clk_put(tc6393xb->clk);
761 kfree(tc6393xb);
762
763 return ret;
764 }
765
766 #ifdef CONFIG_PM
tc6393xb_suspend(struct platform_device * dev,pm_message_t state)767 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
768 {
769 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
770 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
771 int i, ret;
772
773 tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
774 tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
775
776 for (i = 0; i < 3; i++) {
777 tc6393xb->suspend_state.gpo_dsr[i] =
778 ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
779 tc6393xb->suspend_state.gpo_doecr[i] =
780 ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
781 tc6393xb->suspend_state.gpi_bcr[i] =
782 ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
783 }
784 ret = tcpd->suspend(dev);
785 clk_disable(tc6393xb->clk);
786
787 return ret;
788 }
789
tc6393xb_resume(struct platform_device * dev)790 static int tc6393xb_resume(struct platform_device *dev)
791 {
792 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
793 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
794 int ret;
795 int i;
796
797 clk_enable(tc6393xb->clk);
798
799 ret = tcpd->resume(dev);
800 if (ret)
801 return ret;
802
803 if (!tcpd->resume_restore)
804 return 0;
805
806 iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER);
807 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
808 iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR);
809 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
810 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
811 BIT(15), tc6393xb->scr + SCR_MCR);
812 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
813 iowrite8(0, tc6393xb->scr + SCR_IRR);
814 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
815
816 for (i = 0; i < 3; i++) {
817 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
818 tc6393xb->scr + SCR_GPO_DSR(i));
819 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
820 tc6393xb->scr + SCR_GPO_DOECR(i));
821 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
822 tc6393xb->scr + SCR_GPI_BCR(i));
823 }
824
825 return 0;
826 }
827 #else
828 #define tc6393xb_suspend NULL
829 #define tc6393xb_resume NULL
830 #endif
831
832 static struct platform_driver tc6393xb_driver = {
833 .probe = tc6393xb_probe,
834 .remove = __devexit_p(tc6393xb_remove),
835 .suspend = tc6393xb_suspend,
836 .resume = tc6393xb_resume,
837
838 .driver = {
839 .name = "tc6393xb",
840 .owner = THIS_MODULE,
841 },
842 };
843
tc6393xb_init(void)844 static int __init tc6393xb_init(void)
845 {
846 return platform_driver_register(&tc6393xb_driver);
847 }
848
tc6393xb_exit(void)849 static void __exit tc6393xb_exit(void)
850 {
851 platform_driver_unregister(&tc6393xb_driver);
852 }
853
854 subsys_initcall(tc6393xb_init);
855 module_exit(tc6393xb_exit);
856
857 MODULE_LICENSE("GPL v2");
858 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
859 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
860 MODULE_ALIAS("platform:tc6393xb");
861
862