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/driver.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 raw_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 raw_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 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
136
137 return 0;
138 }
139
140 static struct resource 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 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 raw_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 raw_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 raw_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 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
262
263 return 0;
264 }
265
tc6393xb_ohci_suspend(struct platform_device * dev)266 static int tc6393xb_ohci_suspend(struct platform_device *dev)
267 {
268 struct tc6393xb_platform_data *tcpd = dev_get_platdata(dev->dev.parent);
269
270 /* We can't properly store/restore OHCI state, so fail here */
271 if (tcpd->resume_restore)
272 return -EBUSY;
273
274 return tc6393xb_ohci_disable(dev);
275 }
276
tc6393xb_fb_enable(struct platform_device * dev)277 static int tc6393xb_fb_enable(struct platform_device *dev)
278 {
279 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
280 unsigned long flags;
281 u16 ccr;
282
283 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
284
285 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
286 ccr &= ~SCR_CCR_MCLK_MASK;
287 ccr |= SCR_CCR_MCLK_48;
288 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
289
290 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
291
292 return 0;
293 }
294
tc6393xb_fb_disable(struct platform_device * dev)295 static int tc6393xb_fb_disable(struct platform_device *dev)
296 {
297 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
298 unsigned long flags;
299 u16 ccr;
300
301 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
302
303 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
304 ccr &= ~SCR_CCR_MCLK_MASK;
305 ccr |= SCR_CCR_MCLK_OFF;
306 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
307
308 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
309
310 return 0;
311 }
312
tc6393xb_lcd_set_power(struct platform_device * fb,bool on)313 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
314 {
315 struct platform_device *dev = to_platform_device(fb->dev.parent);
316 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
317 u8 fer;
318 unsigned long flags;
319
320 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
321
322 fer = ioread8(tc6393xb->scr + SCR_FER);
323 if (on)
324 fer |= SCR_FER_SLCDEN;
325 else
326 fer &= ~SCR_FER_SLCDEN;
327 iowrite8(fer, tc6393xb->scr + SCR_FER);
328
329 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
330
331 return 0;
332 }
333 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
334
tc6393xb_lcd_mode(struct platform_device * fb,const struct fb_videomode * mode)335 int tc6393xb_lcd_mode(struct platform_device *fb,
336 const struct fb_videomode *mode) {
337 struct platform_device *dev = to_platform_device(fb->dev.parent);
338 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
339 unsigned long flags;
340
341 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
342
343 iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
344 iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
345
346 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
347
348 return 0;
349 }
350 EXPORT_SYMBOL(tc6393xb_lcd_mode);
351
tc6393xb_mmc_enable(struct platform_device * mmc)352 static int tc6393xb_mmc_enable(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_enable(tc6393xb->scr + 0x200, 0,
358 tc6393xb_mmc_resources[0].start & 0xfffe);
359
360 return 0;
361 }
362
tc6393xb_mmc_resume(struct platform_device * mmc)363 static int tc6393xb_mmc_resume(struct platform_device *mmc)
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_resume(tc6393xb->scr + 0x200, 0,
369 tc6393xb_mmc_resources[0].start & 0xfffe);
370
371 return 0;
372 }
373
tc6393xb_mmc_pwr(struct platform_device * mmc,int state)374 static void tc6393xb_mmc_pwr(struct platform_device *mmc, int state)
375 {
376 struct platform_device *dev = to_platform_device(mmc->dev.parent);
377 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
378
379 tmio_core_mmc_pwr(tc6393xb->scr + 0x200, 0, state);
380 }
381
tc6393xb_mmc_clk_div(struct platform_device * mmc,int state)382 static void tc6393xb_mmc_clk_div(struct platform_device *mmc, int state)
383 {
384 struct platform_device *dev = to_platform_device(mmc->dev.parent);
385 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
386
387 tmio_core_mmc_clk_div(tc6393xb->scr + 0x200, 0, state);
388 }
389
390 static struct tmio_mmc_data tc6393xb_mmc_data = {
391 .hclk = 24000000,
392 .set_pwr = tc6393xb_mmc_pwr,
393 .set_clk_div = tc6393xb_mmc_clk_div,
394 };
395
396 static struct mfd_cell tc6393xb_cells[] = {
397 [TC6393XB_CELL_NAND] = {
398 .name = "tmio-nand",
399 .enable = tc6393xb_nand_enable,
400 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
401 .resources = tc6393xb_nand_resources,
402 },
403 [TC6393XB_CELL_MMC] = {
404 .name = "tmio-mmc",
405 .enable = tc6393xb_mmc_enable,
406 .resume = tc6393xb_mmc_resume,
407 .platform_data = &tc6393xb_mmc_data,
408 .pdata_size = sizeof(tc6393xb_mmc_data),
409 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
410 .resources = tc6393xb_mmc_resources,
411 },
412 [TC6393XB_CELL_OHCI] = {
413 .name = "tmio-ohci",
414 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
415 .resources = tc6393xb_ohci_resources,
416 .enable = tc6393xb_ohci_enable,
417 .suspend = tc6393xb_ohci_suspend,
418 .resume = tc6393xb_ohci_enable,
419 .disable = tc6393xb_ohci_disable,
420 },
421 [TC6393XB_CELL_FB] = {
422 .name = "tmio-fb",
423 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
424 .resources = tc6393xb_fb_resources,
425 .enable = tc6393xb_fb_enable,
426 .suspend = tc6393xb_fb_disable,
427 .resume = tc6393xb_fb_enable,
428 .disable = tc6393xb_fb_disable,
429 },
430 };
431
432 /*--------------------------------------------------------------------------*/
433
tc6393xb_gpio_get(struct gpio_chip * chip,unsigned offset)434 static int tc6393xb_gpio_get(struct gpio_chip *chip,
435 unsigned offset)
436 {
437 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
438
439 /* XXX: does dsr also represent inputs? */
440 return !!(tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
441 & TC_GPIO_BIT(offset));
442 }
443
__tc6393xb_gpio_set(struct gpio_chip * chip,unsigned offset,int value)444 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
445 unsigned offset, int value)
446 {
447 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
448 u8 dsr;
449
450 dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
451 if (value)
452 dsr |= TC_GPIO_BIT(offset);
453 else
454 dsr &= ~TC_GPIO_BIT(offset);
455
456 tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
457 }
458
tc6393xb_gpio_set(struct gpio_chip * chip,unsigned offset,int value)459 static void tc6393xb_gpio_set(struct gpio_chip *chip,
460 unsigned offset, int value)
461 {
462 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
463 unsigned long flags;
464
465 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
466
467 __tc6393xb_gpio_set(chip, offset, value);
468
469 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
470 }
471
tc6393xb_gpio_direction_input(struct gpio_chip * chip,unsigned offset)472 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
473 unsigned offset)
474 {
475 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
476 unsigned long flags;
477 u8 doecr;
478
479 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
480
481 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
482 doecr &= ~TC_GPIO_BIT(offset);
483 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
484
485 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
486
487 return 0;
488 }
489
tc6393xb_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)490 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
491 unsigned offset, int value)
492 {
493 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
494 unsigned long flags;
495 u8 doecr;
496
497 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
498
499 __tc6393xb_gpio_set(chip, offset, value);
500
501 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
502 doecr |= TC_GPIO_BIT(offset);
503 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
504
505 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
506
507 return 0;
508 }
509
tc6393xb_register_gpio(struct tc6393xb * tc6393xb,int gpio_base)510 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
511 {
512 tc6393xb->gpio.label = "tc6393xb";
513 tc6393xb->gpio.base = gpio_base;
514 tc6393xb->gpio.ngpio = 16;
515 tc6393xb->gpio.set = tc6393xb_gpio_set;
516 tc6393xb->gpio.get = tc6393xb_gpio_get;
517 tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
518 tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
519
520 return gpiochip_add_data(&tc6393xb->gpio, tc6393xb);
521 }
522
523 /*--------------------------------------------------------------------------*/
524
tc6393xb_irq(struct irq_desc * desc)525 static void tc6393xb_irq(struct irq_desc *desc)
526 {
527 struct tc6393xb *tc6393xb = irq_desc_get_handler_data(desc);
528 unsigned int isr;
529 unsigned int i, irq_base;
530
531 irq_base = tc6393xb->irq_base;
532
533 while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
534 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
535 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
536 if (isr & (1 << i))
537 generic_handle_irq(irq_base + i);
538 }
539 }
540
tc6393xb_irq_ack(struct irq_data * data)541 static void tc6393xb_irq_ack(struct irq_data *data)
542 {
543 }
544
tc6393xb_irq_mask(struct irq_data * data)545 static void tc6393xb_irq_mask(struct irq_data *data)
546 {
547 struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
548 unsigned long flags;
549 u8 imr;
550
551 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
552 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
553 imr |= 1 << (data->irq - tc6393xb->irq_base);
554 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
555 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
556 }
557
tc6393xb_irq_unmask(struct irq_data * data)558 static void tc6393xb_irq_unmask(struct irq_data *data)
559 {
560 struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
561 unsigned long flags;
562 u8 imr;
563
564 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
565 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
566 imr &= ~(1 << (data->irq - tc6393xb->irq_base));
567 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
568 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
569 }
570
571 static struct irq_chip tc6393xb_chip = {
572 .name = "tc6393xb",
573 .irq_ack = tc6393xb_irq_ack,
574 .irq_mask = tc6393xb_irq_mask,
575 .irq_unmask = tc6393xb_irq_unmask,
576 };
577
tc6393xb_attach_irq(struct platform_device * dev)578 static void tc6393xb_attach_irq(struct platform_device *dev)
579 {
580 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
581 unsigned int irq, irq_base;
582
583 irq_base = tc6393xb->irq_base;
584
585 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
586 irq_set_chip_and_handler(irq, &tc6393xb_chip, handle_edge_irq);
587 irq_set_chip_data(irq, tc6393xb);
588 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
589 }
590
591 irq_set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
592 irq_set_chained_handler_and_data(tc6393xb->irq, tc6393xb_irq,
593 tc6393xb);
594 }
595
tc6393xb_detach_irq(struct platform_device * dev)596 static void tc6393xb_detach_irq(struct platform_device *dev)
597 {
598 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
599 unsigned int irq, irq_base;
600
601 irq_set_chained_handler_and_data(tc6393xb->irq, NULL, NULL);
602
603 irq_base = tc6393xb->irq_base;
604
605 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
606 irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
607 irq_set_chip(irq, NULL);
608 irq_set_chip_data(irq, NULL);
609 }
610 }
611
612 /*--------------------------------------------------------------------------*/
613
tc6393xb_probe(struct platform_device * dev)614 static int tc6393xb_probe(struct platform_device *dev)
615 {
616 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
617 struct tc6393xb *tc6393xb;
618 struct resource *iomem, *rscr;
619 int ret;
620
621 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
622 if (!iomem)
623 return -EINVAL;
624
625 tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
626 if (!tc6393xb) {
627 ret = -ENOMEM;
628 goto err_kzalloc;
629 }
630
631 raw_spin_lock_init(&tc6393xb->lock);
632
633 platform_set_drvdata(dev, tc6393xb);
634
635 ret = platform_get_irq(dev, 0);
636 if (ret >= 0)
637 tc6393xb->irq = ret;
638 else
639 goto err_noirq;
640
641 tc6393xb->iomem = iomem;
642 tc6393xb->irq_base = tcpd->irq_base;
643
644 tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
645 if (IS_ERR(tc6393xb->clk)) {
646 ret = PTR_ERR(tc6393xb->clk);
647 goto err_clk_get;
648 }
649
650 rscr = &tc6393xb->rscr;
651 rscr->name = "tc6393xb-core";
652 rscr->start = iomem->start;
653 rscr->end = iomem->start + 0xff;
654 rscr->flags = IORESOURCE_MEM;
655
656 ret = request_resource(iomem, rscr);
657 if (ret)
658 goto err_request_scr;
659
660 tc6393xb->scr = ioremap(rscr->start, resource_size(rscr));
661 if (!tc6393xb->scr) {
662 ret = -ENOMEM;
663 goto err_ioremap;
664 }
665
666 ret = clk_prepare_enable(tc6393xb->clk);
667 if (ret)
668 goto err_clk_enable;
669
670 ret = tcpd->enable(dev);
671 if (ret)
672 goto err_enable;
673
674 iowrite8(0, tc6393xb->scr + SCR_FER);
675 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
676 iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
677 tc6393xb->scr + SCR_CCR);
678 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
679 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
680 BIT(15), tc6393xb->scr + SCR_MCR);
681 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
682 iowrite8(0, tc6393xb->scr + SCR_IRR);
683 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
684
685 printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
686 tmio_ioread8(tc6393xb->scr + SCR_REVID),
687 (unsigned long) iomem->start, tc6393xb->irq);
688
689 tc6393xb->gpio.base = -1;
690
691 if (tcpd->gpio_base >= 0) {
692 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
693 if (ret)
694 goto err_gpio_add;
695 }
696
697 tc6393xb_attach_irq(dev);
698
699 if (tcpd->setup) {
700 ret = tcpd->setup(dev);
701 if (ret)
702 goto err_setup;
703 }
704
705 tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = tcpd->nand_data;
706 tc6393xb_cells[TC6393XB_CELL_NAND].pdata_size =
707 sizeof(*tcpd->nand_data);
708 tc6393xb_cells[TC6393XB_CELL_FB].platform_data = tcpd->fb_data;
709 tc6393xb_cells[TC6393XB_CELL_FB].pdata_size = sizeof(*tcpd->fb_data);
710
711 ret = mfd_add_devices(&dev->dev, dev->id,
712 tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
713 iomem, tcpd->irq_base, NULL);
714
715 if (!ret)
716 return 0;
717
718 if (tcpd->teardown)
719 tcpd->teardown(dev);
720
721 err_setup:
722 tc6393xb_detach_irq(dev);
723
724 err_gpio_add:
725 if (tc6393xb->gpio.base != -1)
726 gpiochip_remove(&tc6393xb->gpio);
727 tcpd->disable(dev);
728 err_enable:
729 clk_disable_unprepare(tc6393xb->clk);
730 err_clk_enable:
731 iounmap(tc6393xb->scr);
732 err_ioremap:
733 release_resource(&tc6393xb->rscr);
734 err_request_scr:
735 clk_put(tc6393xb->clk);
736 err_noirq:
737 err_clk_get:
738 kfree(tc6393xb);
739 err_kzalloc:
740 return ret;
741 }
742
tc6393xb_remove(struct platform_device * dev)743 static int tc6393xb_remove(struct platform_device *dev)
744 {
745 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
746 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
747 int ret;
748
749 mfd_remove_devices(&dev->dev);
750
751 if (tcpd->teardown)
752 tcpd->teardown(dev);
753
754 tc6393xb_detach_irq(dev);
755
756 if (tc6393xb->gpio.base != -1)
757 gpiochip_remove(&tc6393xb->gpio);
758
759 ret = tcpd->disable(dev);
760 clk_disable_unprepare(tc6393xb->clk);
761 iounmap(tc6393xb->scr);
762 release_resource(&tc6393xb->rscr);
763 clk_put(tc6393xb->clk);
764 kfree(tc6393xb);
765
766 return ret;
767 }
768
769 #ifdef CONFIG_PM
tc6393xb_suspend(struct platform_device * dev,pm_message_t state)770 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
771 {
772 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
773 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
774 int i, ret;
775
776 tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
777 tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
778
779 for (i = 0; i < 3; i++) {
780 tc6393xb->suspend_state.gpo_dsr[i] =
781 ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
782 tc6393xb->suspend_state.gpo_doecr[i] =
783 ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
784 tc6393xb->suspend_state.gpi_bcr[i] =
785 ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
786 }
787 ret = tcpd->suspend(dev);
788 clk_disable_unprepare(tc6393xb->clk);
789
790 return ret;
791 }
792
tc6393xb_resume(struct platform_device * dev)793 static int tc6393xb_resume(struct platform_device *dev)
794 {
795 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
796 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
797 int ret;
798 int i;
799
800 ret = clk_prepare_enable(tc6393xb->clk);
801 if (ret)
802 return ret;
803
804 ret = tcpd->resume(dev);
805 if (ret)
806 return ret;
807
808 if (!tcpd->resume_restore)
809 return 0;
810
811 iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER);
812 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
813 iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR);
814 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
815 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
816 BIT(15), tc6393xb->scr + SCR_MCR);
817 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
818 iowrite8(0, tc6393xb->scr + SCR_IRR);
819 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
820
821 for (i = 0; i < 3; i++) {
822 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
823 tc6393xb->scr + SCR_GPO_DSR(i));
824 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
825 tc6393xb->scr + SCR_GPO_DOECR(i));
826 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
827 tc6393xb->scr + SCR_GPI_BCR(i));
828 }
829
830 return 0;
831 }
832 #else
833 #define tc6393xb_suspend NULL
834 #define tc6393xb_resume NULL
835 #endif
836
837 static struct platform_driver tc6393xb_driver = {
838 .probe = tc6393xb_probe,
839 .remove = tc6393xb_remove,
840 .suspend = tc6393xb_suspend,
841 .resume = tc6393xb_resume,
842
843 .driver = {
844 .name = "tc6393xb",
845 },
846 };
847
tc6393xb_init(void)848 static int __init tc6393xb_init(void)
849 {
850 return platform_driver_register(&tc6393xb_driver);
851 }
852
tc6393xb_exit(void)853 static void __exit tc6393xb_exit(void)
854 {
855 platform_driver_unregister(&tc6393xb_driver);
856 }
857
858 subsys_initcall(tc6393xb_init);
859 module_exit(tc6393xb_exit);
860
861 MODULE_LICENSE("GPL v2");
862 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
863 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
864 MODULE_ALIAS("platform:tc6393xb");
865
866
