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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / mfd / tc6393xb.c
blob05d5059ca203d775d941bc6f52e2025c778f21e7
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Toshiba TC6393XB SoC support
4 *
5 * Copyright(c) 2005-2006 Chris Humbert
6 * Copyright(c) 2005 Dirk Opfer
7 * Copyright(c) 2005 Ian Molton <spyro@f2s.com>
8 * Copyright(c) 2007 Dmitry Baryshkov
9 *
10 * Based on code written by Sharp/Lineo for 2.4 kernels
11 * Based on locomo.c
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/io.h>
17 #include <linux/irq.h>
18 #include <linux/platform_device.h>
19 #include <linux/clk.h>
20 #include <linux/err.h>
21 #include <linux/mfd/core.h>
22 #include <linux/mfd/tmio.h>
23 #include <linux/mfd/tc6393xb.h>
24 #include <linux/gpio/driver.h>
25 #include <linux/slab.h>
26
27 #define SCR_REVID 0x08 /* b Revision ID */
28 #define SCR_ISR 0x50 /* b Interrupt Status */
29 #define SCR_IMR 0x52 /* b Interrupt Mask */
30 #define SCR_IRR 0x54 /* b Interrupt Routing */
31 #define SCR_GPER 0x60 /* w GP Enable */
32 #define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */
33 #define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */
34 #define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */
35 #define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */
36 #define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */
37 #define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */
38 #define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */
39 #define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */
40 #define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */
41 #define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */
42 #define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */
43 #define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */
44 #define SCR_CCR 0x98 /* w Clock Control */
45 #define SCR_PLL2CR 0x9a /* w PLL2 Control */
46 #define SCR_PLL1CR 0x9c /* l PLL1 Control */
47 #define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */
48 #define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */
49 #define SCR_FER 0xe0 /* b Function Enable */
50 #define SCR_MCR 0xe4 /* w Mode Control */
51 #define SCR_CONFIG 0xfc /* b Configuration Control */
52 #define SCR_DEBUG 0xff /* b Debug */
53
54 #define SCR_CCR_CK32K BIT(0)
55 #define SCR_CCR_USBCK BIT(1)
56 #define SCR_CCR_UNK1 BIT(4)
57 #define SCR_CCR_MCLK_MASK (7 << 8)
58 #define SCR_CCR_MCLK_OFF (0 << 8)
59 #define SCR_CCR_MCLK_12 (1 << 8)
60 #define SCR_CCR_MCLK_24 (2 << 8)
61 #define SCR_CCR_MCLK_48 (3 << 8)
62 #define SCR_CCR_HCLK_MASK (3 << 12)
63 #define SCR_CCR_HCLK_24 (0 << 12)
64 #define SCR_CCR_HCLK_48 (1 << 12)
65
66 #define SCR_FER_USBEN BIT(0) /* USB host enable */
67 #define SCR_FER_LCDCVEN BIT(1) /* polysilicon TFT enable */
68 #define SCR_FER_SLCDEN BIT(2) /* SLCD enable */
69
70 #define SCR_MCR_RDY_MASK (3 << 0)
71 #define SCR_MCR_RDY_OPENDRAIN (0 << 0)
72 #define SCR_MCR_RDY_TRISTATE (1 << 0)
73 #define SCR_MCR_RDY_PUSHPULL (2 << 0)
74 #define SCR_MCR_RDY_UNK BIT(2)
75 #define SCR_MCR_RDY_EN BIT(3)
76 #define SCR_MCR_INT_MASK (3 << 4)
77 #define SCR_MCR_INT_OPENDRAIN (0 << 4)
78 #define SCR_MCR_INT_TRISTATE (1 << 4)
79 #define SCR_MCR_INT_PUSHPULL (2 << 4)
80 #define SCR_MCR_INT_UNK BIT(6)
81 #define SCR_MCR_INT_EN BIT(7)
82 /* bits 8 - 16 are unknown */
83
84 #define TC_GPIO_BIT(i) (1 << (i & 0x7))
85
86 /*--------------------------------------------------------------------------*/
87
88 struct tc6393xb {
89 void __iomem *scr;
90
91 struct gpio_chip gpio;
92
93 struct clk *clk; /* 3,6 Mhz */
94
95 raw_spinlock_t lock; /* protects RMW cycles */
96
97 struct {
98 u8 fer;
99 u16 ccr;
100 u8 gpi_bcr[3];
101 u8 gpo_dsr[3];
102 u8 gpo_doecr[3];
103 } suspend_state;
104
105 struct resource rscr;
106 struct resource *iomem;
107 int irq;
108 int irq_base;
109 };
110
111 enum {
112 TC6393XB_CELL_NAND,
113 TC6393XB_CELL_MMC,
114 TC6393XB_CELL_OHCI,
115 TC6393XB_CELL_FB,
116 };
117
118 /*--------------------------------------------------------------------------*/
119
120 static int tc6393xb_nand_enable(struct platform_device *nand)
121 {
122 struct tc6393xb *tc6393xb = dev_get_drvdata(nand->dev.parent);
123 unsigned long flags;
124
125 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
126
127 /* SMD buffer on */
128 dev_dbg(nand->dev.parent, "SMD buffer on\n");
129 tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
130
131 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
132
133 return 0;
134 }
135
136 static struct resource tc6393xb_nand_resources[] = {
137 {
138 .start = 0x1000,
139 .end = 0x1007,
140 .flags = IORESOURCE_MEM,
141 },
142 {
143 .start = 0x0100,
144 .end = 0x01ff,
145 .flags = IORESOURCE_MEM,
146 },
147 {
148 .start = IRQ_TC6393_NAND,
149 .end = IRQ_TC6393_NAND,
150 .flags = IORESOURCE_IRQ,
151 },
152 };
153
154 static struct resource tc6393xb_mmc_resources[] = {
155 {
156 .start = 0x800,
157 .end = 0x9ff,
158 .flags = IORESOURCE_MEM,
159 },
160 {
161 .start = IRQ_TC6393_MMC,
162 .end = IRQ_TC6393_MMC,
163 .flags = IORESOURCE_IRQ,
164 },
165 };
166
167 static const struct resource tc6393xb_ohci_resources[] = {
168 {
169 .start = 0x3000,
170 .end = 0x31ff,
171 .flags = IORESOURCE_MEM,
172 },
173 {
174 .start = 0x0300,
175 .end = 0x03ff,
176 .flags = IORESOURCE_MEM,
177 },
178 {
179 .start = 0x010000,
180 .end = 0x017fff,
181 .flags = IORESOURCE_MEM,
182 },
183 {
184 .start = 0x018000,
185 .end = 0x01ffff,
186 .flags = IORESOURCE_MEM,
187 },
188 {
189 .start = IRQ_TC6393_OHCI,
190 .end = IRQ_TC6393_OHCI,
191 .flags = IORESOURCE_IRQ,
192 },
193 };
194
195 static struct resource tc6393xb_fb_resources[] = {
196 {
197 .start = 0x5000,
198 .end = 0x51ff,
199 .flags = IORESOURCE_MEM,
200 },
201 {
202 .start = 0x0500,
203 .end = 0x05ff,
204 .flags = IORESOURCE_MEM,
205 },
206 {
207 .start = 0x100000,
208 .end = 0x1fffff,
209 .flags = IORESOURCE_MEM,
210 },
211 {
212 .start = IRQ_TC6393_FB,
213 .end = IRQ_TC6393_FB,
214 .flags = IORESOURCE_IRQ,
215 },
216 };
217
218 static int tc6393xb_ohci_enable(struct platform_device *dev)
219 {
220 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
221 unsigned long flags;
222 u16 ccr;
223 u8 fer;
224
225 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
226
227 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
228 ccr |= SCR_CCR_USBCK;
229 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
230
231 fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
232 fer |= SCR_FER_USBEN;
233 tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
234
235 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
236
237 return 0;
238 }
239
240 static int tc6393xb_ohci_disable(struct platform_device *dev)
241 {
242 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
243 unsigned long flags;
244 u16 ccr;
245 u8 fer;
246
247 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
248
249 fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
250 fer &= ~SCR_FER_USBEN;
251 tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
252
253 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
254 ccr &= ~SCR_CCR_USBCK;
255 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
256
257 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
258
259 return 0;
260 }
261
262 static int tc6393xb_ohci_suspend(struct platform_device *dev)
263 {
264 struct tc6393xb_platform_data *tcpd = dev_get_platdata(dev->dev.parent);
265
266 /* We can't properly store/restore OHCI state, so fail here */
267 if (tcpd->resume_restore)
268 return -EBUSY;
269
270 return tc6393xb_ohci_disable(dev);
271 }
272
273 static int tc6393xb_fb_enable(struct platform_device *dev)
274 {
275 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
276 unsigned long flags;
277 u16 ccr;
278
279 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
280
281 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
282 ccr &= ~SCR_CCR_MCLK_MASK;
283 ccr |= SCR_CCR_MCLK_48;
284 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
285
286 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
287
288 return 0;
289 }
290
291 static int tc6393xb_fb_disable(struct platform_device *dev)
292 {
293 struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
294 unsigned long flags;
295 u16 ccr;
296
297 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
298
299 ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
300 ccr &= ~SCR_CCR_MCLK_MASK;
301 ccr |= SCR_CCR_MCLK_OFF;
302 tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
303
304 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
305
306 return 0;
307 }
308
309 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
310 {
311 struct tc6393xb *tc6393xb = dev_get_drvdata(fb->dev.parent);
312 u8 fer;
313 unsigned long flags;
314
315 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
316
317 fer = ioread8(tc6393xb->scr + SCR_FER);
318 if (on)
319 fer |= SCR_FER_SLCDEN;
320 else
321 fer &= ~SCR_FER_SLCDEN;
322 iowrite8(fer, tc6393xb->scr + SCR_FER);
323
324 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
325
326 return 0;
327 }
328 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
329
330 int tc6393xb_lcd_mode(struct platform_device *fb,
331 const struct fb_videomode *mode) {
332 struct tc6393xb *tc6393xb = dev_get_drvdata(fb->dev.parent);
333 unsigned long flags;
334
335 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
336
337 iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
338 iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
339
340 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
341
342 return 0;
343 }
344 EXPORT_SYMBOL(tc6393xb_lcd_mode);
345
346 static int tc6393xb_mmc_enable(struct platform_device *mmc)
347 {
348 struct tc6393xb *tc6393xb = dev_get_drvdata(mmc->dev.parent);
349
350 tmio_core_mmc_enable(tc6393xb->scr + 0x200, 0,
351 tc6393xb_mmc_resources[0].start & 0xfffe);
352
353 return 0;
354 }
355
356 static int tc6393xb_mmc_resume(struct platform_device *mmc)
357 {
358 struct tc6393xb *tc6393xb = dev_get_drvdata(mmc->dev.parent);
359
360 tmio_core_mmc_resume(tc6393xb->scr + 0x200, 0,
361 tc6393xb_mmc_resources[0].start & 0xfffe);
362
363 return 0;
364 }
365
366 static void tc6393xb_mmc_pwr(struct platform_device *mmc, int state)
367 {
368 struct tc6393xb *tc6393xb = dev_get_drvdata(mmc->dev.parent);
369
370 tmio_core_mmc_pwr(tc6393xb->scr + 0x200, 0, state);
371 }
372
373 static void tc6393xb_mmc_clk_div(struct platform_device *mmc, int state)
374 {
375 struct tc6393xb *tc6393xb = dev_get_drvdata(mmc->dev.parent);
376
377 tmio_core_mmc_clk_div(tc6393xb->scr + 0x200, 0, state);
378 }
379
380 static struct tmio_mmc_data tc6393xb_mmc_data = {
381 .hclk = 24000000,
382 .set_pwr = tc6393xb_mmc_pwr,
383 .set_clk_div = tc6393xb_mmc_clk_div,
384 };
385
386 static struct mfd_cell tc6393xb_cells[] = {
387 [TC6393XB_CELL_NAND] = {
388 .name = "tmio-nand",
389 .enable = tc6393xb_nand_enable,
390 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
391 .resources = tc6393xb_nand_resources,
392 },
393 [TC6393XB_CELL_MMC] = {
394 .name = "tmio-mmc",
395 .enable = tc6393xb_mmc_enable,
396 .resume = tc6393xb_mmc_resume,
397 .platform_data = &tc6393xb_mmc_data,
398 .pdata_size = sizeof(tc6393xb_mmc_data),
399 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
400 .resources = tc6393xb_mmc_resources,
401 },
402 [TC6393XB_CELL_OHCI] = {
403 .name = "tmio-ohci",
404 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
405 .resources = tc6393xb_ohci_resources,
406 .enable = tc6393xb_ohci_enable,
407 .suspend = tc6393xb_ohci_suspend,
408 .resume = tc6393xb_ohci_enable,
409 .disable = tc6393xb_ohci_disable,
410 },
411 [TC6393XB_CELL_FB] = {
412 .name = "tmio-fb",
413 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
414 .resources = tc6393xb_fb_resources,
415 .enable = tc6393xb_fb_enable,
416 .suspend = tc6393xb_fb_disable,
417 .resume = tc6393xb_fb_enable,
418 .disable = tc6393xb_fb_disable,
419 },
420 };
421
422 /*--------------------------------------------------------------------------*/
423
424 static int tc6393xb_gpio_get(struct gpio_chip *chip,
425 unsigned offset)
426 {
427 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
428
429 /* XXX: does dsr also represent inputs? */
430 return !!(tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
431 & TC_GPIO_BIT(offset));
432 }
433
434 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
435 unsigned offset, int value)
436 {
437 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
438 u8 dsr;
439
440 dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
441 if (value)
442 dsr |= TC_GPIO_BIT(offset);
443 else
444 dsr &= ~TC_GPIO_BIT(offset);
445
446 tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
447 }
448
449 static void tc6393xb_gpio_set(struct gpio_chip *chip,
450 unsigned offset, int value)
451 {
452 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
453 unsigned long flags;
454
455 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
456
457 __tc6393xb_gpio_set(chip, offset, value);
458
459 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
460 }
461
462 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
463 unsigned offset)
464 {
465 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
466 unsigned long flags;
467 u8 doecr;
468
469 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
470
471 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
472 doecr &= ~TC_GPIO_BIT(offset);
473 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
474
475 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
476
477 return 0;
478 }
479
480 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
481 unsigned offset, int value)
482 {
483 struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
484 unsigned long flags;
485 u8 doecr;
486
487 raw_spin_lock_irqsave(&tc6393xb->lock, flags);
488
489 __tc6393xb_gpio_set(chip, offset, value);
490
491 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
492 doecr |= TC_GPIO_BIT(offset);
493 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
494
495 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
496
497 return 0;
498 }
499
500 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
501 {
502 tc6393xb->gpio.label = "tc6393xb";
503 tc6393xb->gpio.base = gpio_base;
504 tc6393xb->gpio.ngpio = 16;
505 tc6393xb->gpio.set = tc6393xb_gpio_set;
506 tc6393xb->gpio.get = tc6393xb_gpio_get;
507 tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
508 tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
509
510 return gpiochip_add_data(&tc6393xb->gpio, tc6393xb);
511 }
512
513 /*--------------------------------------------------------------------------*/
514
515 static void tc6393xb_irq(struct irq_desc *desc)
516 {
517 struct tc6393xb *tc6393xb = irq_desc_get_handler_data(desc);
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
531 static void tc6393xb_irq_ack(struct irq_data *data)
532 {
533 }
534
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 raw_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 raw_spin_unlock_irqrestore(&tc6393xb->lock, flags);
546 }
547
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 raw_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 raw_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
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 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
579 }
580
581 irq_set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
582 irq_set_chained_handler_and_data(tc6393xb->irq, tc6393xb_irq,
583 tc6393xb);
584 }
585
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_and_data(tc6393xb->irq, NULL, NULL);
592
593 irq_base = tc6393xb->irq_base;
594
595 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
596 irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
597 irq_set_chip(irq, NULL);
598 irq_set_chip_data(irq, NULL);
599 }
600 }
601
602 /*--------------------------------------------------------------------------*/
603
604 static int tc6393xb_probe(struct platform_device *dev)
605 {
606 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
607 struct tc6393xb *tc6393xb;
608 struct resource *iomem, *rscr;
609 int ret;
610
611 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
612 if (!iomem)
613 return -EINVAL;
614
615 tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
616 if (!tc6393xb) {
617 ret = -ENOMEM;
618 goto err_kzalloc;
619 }
620
621 raw_spin_lock_init(&tc6393xb->lock);
622
623 platform_set_drvdata(dev, tc6393xb);
624
625 ret = platform_get_irq(dev, 0);
626 if (ret >= 0)
627 tc6393xb->irq = ret;
628 else
629 goto err_noirq;
630
631 tc6393xb->iomem = iomem;
632 tc6393xb->irq_base = tcpd->irq_base;
633
634 tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
635 if (IS_ERR(tc6393xb->clk)) {
636 ret = PTR_ERR(tc6393xb->clk);
637 goto err_clk_get;
638 }
639
640 rscr = &tc6393xb->rscr;
641 rscr->name = "tc6393xb-core";
642 rscr->start = iomem->start;
643 rscr->end = iomem->start + 0xff;
644 rscr->flags = IORESOURCE_MEM;
645
646 ret = request_resource(iomem, rscr);
647 if (ret)
648 goto err_request_scr;
649
650 tc6393xb->scr = ioremap(rscr->start, resource_size(rscr));
651 if (!tc6393xb->scr) {
652 ret = -ENOMEM;
653 goto err_ioremap;
654 }
655
656 ret = clk_prepare_enable(tc6393xb->clk);
657 if (ret)
658 goto err_clk_enable;
659
660 ret = tcpd->enable(dev);
661 if (ret)
662 goto err_enable;
663
664 iowrite8(0, tc6393xb->scr + SCR_FER);
665 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
666 iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
667 tc6393xb->scr + SCR_CCR);
668 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
669 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
670 BIT(15), tc6393xb->scr + SCR_MCR);
671 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
672 iowrite8(0, tc6393xb->scr + SCR_IRR);
673 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
674
675 printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
676 tmio_ioread8(tc6393xb->scr + SCR_REVID),
677 (unsigned long) iomem->start, tc6393xb->irq);
678
679 tc6393xb->gpio.base = -1;
680
681 if (tcpd->gpio_base >= 0) {
682 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
683 if (ret)
684 goto err_gpio_add;
685 }
686
687 tc6393xb_attach_irq(dev);
688
689 if (tcpd->setup) {
690 ret = tcpd->setup(dev);
691 if (ret)
692 goto err_setup;
693 }
694
695 tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = tcpd->nand_data;
696 tc6393xb_cells[TC6393XB_CELL_NAND].pdata_size =
697 sizeof(*tcpd->nand_data);
698 tc6393xb_cells[TC6393XB_CELL_FB].platform_data = tcpd->fb_data;
699 tc6393xb_cells[TC6393XB_CELL_FB].pdata_size = sizeof(*tcpd->fb_data);
700
701 ret = mfd_add_devices(&dev->dev, dev->id,
702 tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
703 iomem, tcpd->irq_base, NULL);
704
705 if (!ret)
706 return 0;
707
708 if (tcpd->teardown)
709 tcpd->teardown(dev);
710
711 err_setup:
712 tc6393xb_detach_irq(dev);
713
714 err_gpio_add:
715 if (tc6393xb->gpio.base != -1)
716 gpiochip_remove(&tc6393xb->gpio);
717 tcpd->disable(dev);
718 err_enable:
719 clk_disable_unprepare(tc6393xb->clk);
720 err_clk_enable:
721 iounmap(tc6393xb->scr);
722 err_ioremap:
723 release_resource(&tc6393xb->rscr);
724 err_request_scr:
725 clk_put(tc6393xb->clk);
726 err_noirq:
727 err_clk_get:
728 kfree(tc6393xb);
729 err_kzalloc:
730 return ret;
731 }
732
733 static int tc6393xb_remove(struct platform_device *dev)
734 {
735 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
736 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
737 int ret;
738
739 mfd_remove_devices(&dev->dev);
740
741 if (tcpd->teardown)
742 tcpd->teardown(dev);
743
744 tc6393xb_detach_irq(dev);
745
746 if (tc6393xb->gpio.base != -1)
747 gpiochip_remove(&tc6393xb->gpio);
748
749 ret = tcpd->disable(dev);
750 clk_disable_unprepare(tc6393xb->clk);
751 iounmap(tc6393xb->scr);
752 release_resource(&tc6393xb->rscr);
753 clk_put(tc6393xb->clk);
754 kfree(tc6393xb);
755
756 return ret;
757 }
758
759 #ifdef CONFIG_PM
760 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
761 {
762 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
763 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
764 int i, ret;
765
766 tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
767 tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
768
769 for (i = 0; i < 3; i++) {
770 tc6393xb->suspend_state.gpo_dsr[i] =
771 ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
772 tc6393xb->suspend_state.gpo_doecr[i] =
773 ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
774 tc6393xb->suspend_state.gpi_bcr[i] =
775 ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
776 }
777 ret = tcpd->suspend(dev);
778 clk_disable_unprepare(tc6393xb->clk);
779
780 return ret;
781 }
782
783 static int tc6393xb_resume(struct platform_device *dev)
784 {
785 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
786 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
787 int ret;
788 int i;
789
790 ret = clk_prepare_enable(tc6393xb->clk);
791 if (ret)
792 return ret;
793
794 ret = tcpd->resume(dev);
795 if (ret)
796 return ret;
797
798 if (!tcpd->resume_restore)
799 return 0;
800
801 iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER);
802 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
803 iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR);
804 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
805 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
806 BIT(15), tc6393xb->scr + SCR_MCR);
807 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
808 iowrite8(0, tc6393xb->scr + SCR_IRR);
809 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
810
811 for (i = 0; i < 3; i++) {
812 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
813 tc6393xb->scr + SCR_GPO_DSR(i));
814 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
815 tc6393xb->scr + SCR_GPO_DOECR(i));
816 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
817 tc6393xb->scr + SCR_GPI_BCR(i));
818 }
819
820 return 0;
821 }
822 #else
823 #define tc6393xb_suspend NULL
824 #define tc6393xb_resume NULL
825 #endif
826
827 static struct platform_driver tc6393xb_driver = {
828 .probe = tc6393xb_probe,
829 .remove = tc6393xb_remove,
830 .suspend = tc6393xb_suspend,
831 .resume = tc6393xb_resume,
832
833 .driver = {
834 .name = "tc6393xb",
835 },
836 };
837
838 static int __init tc6393xb_init(void)
839 {
840 return platform_driver_register(&tc6393xb_driver);
841 }
842
843 static void __exit tc6393xb_exit(void)
844 {
845 platform_driver_unregister(&tc6393xb_driver);
846 }
847
848 subsys_initcall(tc6393xb_init);
849 module_exit(tc6393xb_exit);
850
851 MODULE_LICENSE("GPL v2");
852 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
853 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
854 MODULE_ALIAS("platform:tc6393xb");
855
Linux with added FPC-III support