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mfd: Fix omap_usbhs_alloc_children error handling
[deliverable/linux.git] / drivers / mfd / asic3.c
1 /*
2 * driver/mfd/asic3.c
3 *
4 * Compaq ASIC3 support.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Copyright 2001 Compaq Computer Corporation.
11 * Copyright 2004-2005 Phil Blundell
12 * Copyright 2007-2008 OpenedHand Ltd.
13 *
14 * Authors: Phil Blundell <pb@handhelds.org>,
15 * Samuel Ortiz <sameo@openedhand.com>
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/delay.h>
21 #include <linux/irq.h>
22 #include <linux/gpio.h>
23 #include <linux/io.h>
24 #include <linux/slab.h>
25 #include <linux/spinlock.h>
26 #include <linux/platform_device.h>
27
28 #include <linux/mfd/asic3.h>
29 #include <linux/mfd/core.h>
30 #include <linux/mfd/ds1wm.h>
31 #include <linux/mfd/tmio.h>
32
33 enum {
34 ASIC3_CLOCK_SPI,
35 ASIC3_CLOCK_OWM,
36 ASIC3_CLOCK_PWM0,
37 ASIC3_CLOCK_PWM1,
38 ASIC3_CLOCK_LED0,
39 ASIC3_CLOCK_LED1,
40 ASIC3_CLOCK_LED2,
41 ASIC3_CLOCK_SD_HOST,
42 ASIC3_CLOCK_SD_BUS,
43 ASIC3_CLOCK_SMBUS,
44 ASIC3_CLOCK_EX0,
45 ASIC3_CLOCK_EX1,
46 };
47
48 struct asic3_clk {
49 int enabled;
50 unsigned int cdex;
51 unsigned long rate;
52 };
53
54 #define INIT_CDEX(_name, _rate) \
55 [ASIC3_CLOCK_##_name] = { \
56 .cdex = CLOCK_CDEX_##_name, \
57 .rate = _rate, \
58 }
59
60 static struct asic3_clk asic3_clk_init[] __initdata = {
61 INIT_CDEX(SPI, 0),
62 INIT_CDEX(OWM, 5000000),
63 INIT_CDEX(PWM0, 0),
64 INIT_CDEX(PWM1, 0),
65 INIT_CDEX(LED0, 0),
66 INIT_CDEX(LED1, 0),
67 INIT_CDEX(LED2, 0),
68 INIT_CDEX(SD_HOST, 24576000),
69 INIT_CDEX(SD_BUS, 12288000),
70 INIT_CDEX(SMBUS, 0),
71 INIT_CDEX(EX0, 32768),
72 INIT_CDEX(EX1, 24576000),
73 };
74
75 struct asic3 {
76 void __iomem *mapping;
77 unsigned int bus_shift;
78 unsigned int irq_nr;
79 unsigned int irq_base;
80 spinlock_t lock;
81 u16 irq_bothedge[4];
82 struct gpio_chip gpio;
83 struct device *dev;
84 void __iomem *tmio_cnf;
85
86 struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)];
87 };
88
89 static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
90
91 void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)
92 {
93 iowrite16(value, asic->mapping +
94 (reg >> asic->bus_shift));
95 }
96 EXPORT_SYMBOL_GPL(asic3_write_register);
97
98 u32 asic3_read_register(struct asic3 *asic, unsigned int reg)
99 {
100 return ioread16(asic->mapping +
101 (reg >> asic->bus_shift));
102 }
103 EXPORT_SYMBOL_GPL(asic3_read_register);
104
105 static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set)
106 {
107 unsigned long flags;
108 u32 val;
109
110 spin_lock_irqsave(&asic->lock, flags);
111 val = asic3_read_register(asic, reg);
112 if (set)
113 val |= bits;
114 else
115 val &= ~bits;
116 asic3_write_register(asic, reg, val);
117 spin_unlock_irqrestore(&asic->lock, flags);
118 }
119
120 /* IRQs */
121 #define MAX_ASIC_ISR_LOOPS 20
122 #define ASIC3_GPIO_BASE_INCR \
123 (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE)
124
125 static void asic3_irq_flip_edge(struct asic3 *asic,
126 u32 base, int bit)
127 {
128 u16 edge;
129 unsigned long flags;
130
131 spin_lock_irqsave(&asic->lock, flags);
132 edge = asic3_read_register(asic,
133 base + ASIC3_GPIO_EDGE_TRIGGER);
134 edge ^= bit;
135 asic3_write_register(asic,
136 base + ASIC3_GPIO_EDGE_TRIGGER, edge);
137 spin_unlock_irqrestore(&asic->lock, flags);
138 }
139
140 static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc)
141 {
142 struct asic3 *asic = irq_desc_get_handler_data(desc);
143 struct irq_data *data = irq_desc_get_irq_data(desc);
144 int iter, i;
145 unsigned long flags;
146
147 data->chip->irq_ack(data);
148
149 for (iter = 0 ; iter < MAX_ASIC_ISR_LOOPS; iter++) {
150 u32 status;
151 int bank;
152
153 spin_lock_irqsave(&asic->lock, flags);
154 status = asic3_read_register(asic,
155 ASIC3_OFFSET(INTR, P_INT_STAT));
156 spin_unlock_irqrestore(&asic->lock, flags);
157
158 /* Check all ten register bits */
159 if ((status & 0x3ff) == 0)
160 break;
161
162 /* Handle GPIO IRQs */
163 for (bank = 0; bank < ASIC3_NUM_GPIO_BANKS; bank++) {
164 if (status & (1 << bank)) {
165 unsigned long base, istat;
166
167 base = ASIC3_GPIO_A_BASE
168 + bank * ASIC3_GPIO_BASE_INCR;
169
170 spin_lock_irqsave(&asic->lock, flags);
171 istat = asic3_read_register(asic,
172 base +
173 ASIC3_GPIO_INT_STATUS);
174 /* Clearing IntStatus */
175 asic3_write_register(asic,
176 base +
177 ASIC3_GPIO_INT_STATUS, 0);
178 spin_unlock_irqrestore(&asic->lock, flags);
179
180 for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) {
181 int bit = (1 << i);
182 unsigned int irqnr;
183
184 if (!(istat & bit))
185 continue;
186
187 irqnr = asic->irq_base +
188 (ASIC3_GPIOS_PER_BANK * bank)
189 + i;
190 generic_handle_irq(irqnr);
191 if (asic->irq_bothedge[bank] & bit)
192 asic3_irq_flip_edge(asic, base,
193 bit);
194 }
195 }
196 }
197
198 /* Handle remaining IRQs in the status register */
199 for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) {
200 /* They start at bit 4 and go up */
201 if (status & (1 << (i - ASIC3_NUM_GPIOS + 4)))
202 generic_handle_irq(asic->irq_base + i);
203 }
204 }
205
206 if (iter >= MAX_ASIC_ISR_LOOPS)
207 dev_err(asic->dev, "interrupt processing overrun\n");
208 }
209
210 static inline int asic3_irq_to_bank(struct asic3 *asic, int irq)
211 {
212 int n;
213
214 n = (irq - asic->irq_base) >> 4;
215
216 return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE));
217 }
218
219 static inline int asic3_irq_to_index(struct asic3 *asic, int irq)
220 {
221 return (irq - asic->irq_base) & 0xf;
222 }
223
224 static void asic3_mask_gpio_irq(struct irq_data *data)
225 {
226 struct asic3 *asic = irq_data_get_irq_chip_data(data);
227 u32 val, bank, index;
228 unsigned long flags;
229
230 bank = asic3_irq_to_bank(asic, data->irq);
231 index = asic3_irq_to_index(asic, data->irq);
232
233 spin_lock_irqsave(&asic->lock, flags);
234 val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
235 val |= 1 << index;
236 asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
237 spin_unlock_irqrestore(&asic->lock, flags);
238 }
239
240 static void asic3_mask_irq(struct irq_data *data)
241 {
242 struct asic3 *asic = irq_data_get_irq_chip_data(data);
243 int regval;
244 unsigned long flags;
245
246 spin_lock_irqsave(&asic->lock, flags);
247 regval = asic3_read_register(asic,
248 ASIC3_INTR_BASE +
249 ASIC3_INTR_INT_MASK);
250
251 regval &= ~(ASIC3_INTMASK_MASK0 <<
252 (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
253
254 asic3_write_register(asic,
255 ASIC3_INTR_BASE +
256 ASIC3_INTR_INT_MASK,
257 regval);
258 spin_unlock_irqrestore(&asic->lock, flags);
259 }
260
261 static void asic3_unmask_gpio_irq(struct irq_data *data)
262 {
263 struct asic3 *asic = irq_data_get_irq_chip_data(data);
264 u32 val, bank, index;
265 unsigned long flags;
266
267 bank = asic3_irq_to_bank(asic, data->irq);
268 index = asic3_irq_to_index(asic, data->irq);
269
270 spin_lock_irqsave(&asic->lock, flags);
271 val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
272 val &= ~(1 << index);
273 asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
274 spin_unlock_irqrestore(&asic->lock, flags);
275 }
276
277 static void asic3_unmask_irq(struct irq_data *data)
278 {
279 struct asic3 *asic = irq_data_get_irq_chip_data(data);
280 int regval;
281 unsigned long flags;
282
283 spin_lock_irqsave(&asic->lock, flags);
284 regval = asic3_read_register(asic,
285 ASIC3_INTR_BASE +
286 ASIC3_INTR_INT_MASK);
287
288 regval |= (ASIC3_INTMASK_MASK0 <<
289 (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
290
291 asic3_write_register(asic,
292 ASIC3_INTR_BASE +
293 ASIC3_INTR_INT_MASK,
294 regval);
295 spin_unlock_irqrestore(&asic->lock, flags);
296 }
297
298 static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type)
299 {
300 struct asic3 *asic = irq_data_get_irq_chip_data(data);
301 u32 bank, index;
302 u16 trigger, level, edge, bit;
303 unsigned long flags;
304
305 bank = asic3_irq_to_bank(asic, data->irq);
306 index = asic3_irq_to_index(asic, data->irq);
307 bit = 1<<index;
308
309 spin_lock_irqsave(&asic->lock, flags);
310 level = asic3_read_register(asic,
311 bank + ASIC3_GPIO_LEVEL_TRIGGER);
312 edge = asic3_read_register(asic,
313 bank + ASIC3_GPIO_EDGE_TRIGGER);
314 trigger = asic3_read_register(asic,
315 bank + ASIC3_GPIO_TRIGGER_TYPE);
316 asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] &= ~bit;
317
318 if (type == IRQ_TYPE_EDGE_RISING) {
319 trigger |= bit;
320 edge |= bit;
321 } else if (type == IRQ_TYPE_EDGE_FALLING) {
322 trigger |= bit;
323 edge &= ~bit;
324 } else if (type == IRQ_TYPE_EDGE_BOTH) {
325 trigger |= bit;
326 if (asic3_gpio_get(&asic->gpio, data->irq - asic->irq_base))
327 edge &= ~bit;
328 else
329 edge |= bit;
330 asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] |= bit;
331 } else if (type == IRQ_TYPE_LEVEL_LOW) {
332 trigger &= ~bit;
333 level &= ~bit;
334 } else if (type == IRQ_TYPE_LEVEL_HIGH) {
335 trigger &= ~bit;
336 level |= bit;
337 } else {
338 /*
339 * if type == IRQ_TYPE_NONE, we should mask interrupts, but
340 * be careful to not unmask them if mask was also called.
341 * Probably need internal state for mask.
342 */
343 dev_notice(asic->dev, "irq type not changed\n");
344 }
345 asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER,
346 level);
347 asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER,
348 edge);
349 asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE,
350 trigger);
351 spin_unlock_irqrestore(&asic->lock, flags);
352 return 0;
353 }
354
355 static struct irq_chip asic3_gpio_irq_chip = {
356 .name = "ASIC3-GPIO",
357 .irq_ack = asic3_mask_gpio_irq,
358 .irq_mask = asic3_mask_gpio_irq,
359 .irq_unmask = asic3_unmask_gpio_irq,
360 .irq_set_type = asic3_gpio_irq_type,
361 };
362
363 static struct irq_chip asic3_irq_chip = {
364 .name = "ASIC3",
365 .irq_ack = asic3_mask_irq,
366 .irq_mask = asic3_mask_irq,
367 .irq_unmask = asic3_unmask_irq,
368 };
369
370 static int __init asic3_irq_probe(struct platform_device *pdev)
371 {
372 struct asic3 *asic = platform_get_drvdata(pdev);
373 unsigned long clksel = 0;
374 unsigned int irq, irq_base;
375 int ret;
376
377 ret = platform_get_irq(pdev, 0);
378 if (ret < 0)
379 return ret;
380 asic->irq_nr = ret;
381
382 /* turn on clock to IRQ controller */
383 clksel |= CLOCK_SEL_CX;
384 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
385 clksel);
386
387 irq_base = asic->irq_base;
388
389 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
390 if (irq < asic->irq_base + ASIC3_NUM_GPIOS)
391 irq_set_chip(irq, &asic3_gpio_irq_chip);
392 else
393 irq_set_chip(irq, &asic3_irq_chip);
394
395 irq_set_chip_data(irq, asic);
396 irq_set_handler(irq, handle_level_irq);
397 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
398 }
399
400 asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
401 ASIC3_INTMASK_GINTMASK);
402
403 irq_set_chained_handler(asic->irq_nr, asic3_irq_demux);
404 irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING);
405 irq_set_handler_data(asic->irq_nr, asic);
406
407 return 0;
408 }
409
410 static void asic3_irq_remove(struct platform_device *pdev)
411 {
412 struct asic3 *asic = platform_get_drvdata(pdev);
413 unsigned int irq, irq_base;
414
415 irq_base = asic->irq_base;
416
417 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
418 set_irq_flags(irq, 0);
419 irq_set_chip_and_handler(irq, NULL, NULL);
420 irq_set_chip_data(irq, NULL);
421 }
422 irq_set_chained_handler(asic->irq_nr, NULL);
423 }
424
425 /* GPIOs */
426 static int asic3_gpio_direction(struct gpio_chip *chip,
427 unsigned offset, int out)
428 {
429 u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg;
430 unsigned int gpio_base;
431 unsigned long flags;
432 struct asic3 *asic;
433
434 asic = container_of(chip, struct asic3, gpio);
435 gpio_base = ASIC3_GPIO_TO_BASE(offset);
436
437 if (gpio_base > ASIC3_GPIO_D_BASE) {
438 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
439 gpio_base, offset);
440 return -EINVAL;
441 }
442
443 spin_lock_irqsave(&asic->lock, flags);
444
445 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION);
446
447 /* Input is 0, Output is 1 */
448 if (out)
449 out_reg |= mask;
450 else
451 out_reg &= ~mask;
452
453 asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg);
454
455 spin_unlock_irqrestore(&asic->lock, flags);
456
457 return 0;
458
459 }
460
461 static int asic3_gpio_direction_input(struct gpio_chip *chip,
462 unsigned offset)
463 {
464 return asic3_gpio_direction(chip, offset, 0);
465 }
466
467 static int asic3_gpio_direction_output(struct gpio_chip *chip,
468 unsigned offset, int value)
469 {
470 return asic3_gpio_direction(chip, offset, 1);
471 }
472
473 static int asic3_gpio_get(struct gpio_chip *chip,
474 unsigned offset)
475 {
476 unsigned int gpio_base;
477 u32 mask = ASIC3_GPIO_TO_MASK(offset);
478 struct asic3 *asic;
479
480 asic = container_of(chip, struct asic3, gpio);
481 gpio_base = ASIC3_GPIO_TO_BASE(offset);
482
483 if (gpio_base > ASIC3_GPIO_D_BASE) {
484 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
485 gpio_base, offset);
486 return -EINVAL;
487 }
488
489 return asic3_read_register(asic, gpio_base + ASIC3_GPIO_STATUS) & mask;
490 }
491
492 static void asic3_gpio_set(struct gpio_chip *chip,
493 unsigned offset, int value)
494 {
495 u32 mask, out_reg;
496 unsigned int gpio_base;
497 unsigned long flags;
498 struct asic3 *asic;
499
500 asic = container_of(chip, struct asic3, gpio);
501 gpio_base = ASIC3_GPIO_TO_BASE(offset);
502
503 if (gpio_base > ASIC3_GPIO_D_BASE) {
504 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
505 gpio_base, offset);
506 return;
507 }
508
509 mask = ASIC3_GPIO_TO_MASK(offset);
510
511 spin_lock_irqsave(&asic->lock, flags);
512
513 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT);
514
515 if (value)
516 out_reg |= mask;
517 else
518 out_reg &= ~mask;
519
520 asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg);
521
522 spin_unlock_irqrestore(&asic->lock, flags);
523
524 return;
525 }
526
527 static __init int asic3_gpio_probe(struct platform_device *pdev,
528 u16 *gpio_config, int num)
529 {
530 struct asic3 *asic = platform_get_drvdata(pdev);
531 u16 alt_reg[ASIC3_NUM_GPIO_BANKS];
532 u16 out_reg[ASIC3_NUM_GPIO_BANKS];
533 u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
534 int i;
535
536 memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
537 memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
538 memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
539
540 /* Enable all GPIOs */
541 asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);
542 asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff);
543 asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff);
544 asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff);
545
546 for (i = 0; i < num; i++) {
547 u8 alt, pin, dir, init, bank_num, bit_num;
548 u16 config = gpio_config[i];
549
550 pin = ASIC3_CONFIG_GPIO_PIN(config);
551 alt = ASIC3_CONFIG_GPIO_ALT(config);
552 dir = ASIC3_CONFIG_GPIO_DIR(config);
553 init = ASIC3_CONFIG_GPIO_INIT(config);
554
555 bank_num = ASIC3_GPIO_TO_BANK(pin);
556 bit_num = ASIC3_GPIO_TO_BIT(pin);
557
558 alt_reg[bank_num] |= (alt << bit_num);
559 out_reg[bank_num] |= (init << bit_num);
560 dir_reg[bank_num] |= (dir << bit_num);
561 }
562
563 for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) {
564 asic3_write_register(asic,
565 ASIC3_BANK_TO_BASE(i) +
566 ASIC3_GPIO_DIRECTION,
567 dir_reg[i]);
568 asic3_write_register(asic,
569 ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT,
570 out_reg[i]);
571 asic3_write_register(asic,
572 ASIC3_BANK_TO_BASE(i) +
573 ASIC3_GPIO_ALT_FUNCTION,
574 alt_reg[i]);
575 }
576
577 return gpiochip_add(&asic->gpio);
578 }
579
580 static int asic3_gpio_remove(struct platform_device *pdev)
581 {
582 struct asic3 *asic = platform_get_drvdata(pdev);
583
584 return gpiochip_remove(&asic->gpio);
585 }
586
587 static int asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk)
588 {
589 unsigned long flags;
590 u32 cdex;
591
592 spin_lock_irqsave(&asic->lock, flags);
593 if (clk->enabled++ == 0) {
594 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
595 cdex |= clk->cdex;
596 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
597 }
598 spin_unlock_irqrestore(&asic->lock, flags);
599
600 return 0;
601 }
602
603 static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
604 {
605 unsigned long flags;
606 u32 cdex;
607
608 WARN_ON(clk->enabled == 0);
609
610 spin_lock_irqsave(&asic->lock, flags);
611 if (--clk->enabled == 0) {
612 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
613 cdex &= ~clk->cdex;
614 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
615 }
616 spin_unlock_irqrestore(&asic->lock, flags);
617 }
618
619 /* MFD cells (SPI, PWM, LED, DS1WM, MMC) */
620 static struct ds1wm_driver_data ds1wm_pdata = {
621 .active_high = 1,
622 };
623
624 static struct resource ds1wm_resources[] = {
625 {
626 .start = ASIC3_OWM_BASE,
627 .end = ASIC3_OWM_BASE + 0x13,
628 .flags = IORESOURCE_MEM,
629 },
630 {
631 .start = ASIC3_IRQ_OWM,
632 .end = ASIC3_IRQ_OWM,
633 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
634 },
635 };
636
637 static int ds1wm_enable(struct platform_device *pdev)
638 {
639 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
640
641 /* Turn on external clocks and the OWM clock */
642 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
643 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
644 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
645 msleep(1);
646
647 /* Reset and enable DS1WM */
648 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
649 ASIC3_EXTCF_OWM_RESET, 1);
650 msleep(1);
651 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
652 ASIC3_EXTCF_OWM_RESET, 0);
653 msleep(1);
654 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
655 ASIC3_EXTCF_OWM_EN, 1);
656 msleep(1);
657
658 return 0;
659 }
660
661 static int ds1wm_disable(struct platform_device *pdev)
662 {
663 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
664
665 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
666 ASIC3_EXTCF_OWM_EN, 0);
667
668 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
669 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
670 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
671
672 return 0;
673 }
674
675 static struct mfd_cell asic3_cell_ds1wm = {
676 .name = "ds1wm",
677 .enable = ds1wm_enable,
678 .disable = ds1wm_disable,
679 .platform_data = &ds1wm_pdata,
680 .pdata_size = sizeof(ds1wm_pdata),
681 .num_resources = ARRAY_SIZE(ds1wm_resources),
682 .resources = ds1wm_resources,
683 };
684
685 static void asic3_mmc_pwr(struct platform_device *pdev, int state)
686 {
687 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
688
689 tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state);
690 }
691
692 static void asic3_mmc_clk_div(struct platform_device *pdev, int state)
693 {
694 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
695
696 tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state);
697 }
698
699 static struct tmio_mmc_data asic3_mmc_data = {
700 .hclk = 24576000,
701 .set_pwr = asic3_mmc_pwr,
702 .set_clk_div = asic3_mmc_clk_div,
703 };
704
705 static struct resource asic3_mmc_resources[] = {
706 {
707 .start = ASIC3_SD_CTRL_BASE,
708 .end = ASIC3_SD_CTRL_BASE + 0x3ff,
709 .flags = IORESOURCE_MEM,
710 },
711 {
712 .start = 0,
713 .end = 0,
714 .flags = IORESOURCE_IRQ,
715 },
716 };
717
718 static int asic3_mmc_enable(struct platform_device *pdev)
719 {
720 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
721
722 /* Not sure if it must be done bit by bit, but leaving as-is */
723 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
724 ASIC3_SDHWCTRL_LEVCD, 1);
725 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
726 ASIC3_SDHWCTRL_LEVWP, 1);
727 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
728 ASIC3_SDHWCTRL_SUSPEND, 0);
729 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
730 ASIC3_SDHWCTRL_PCLR, 0);
731
732 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
733 /* CLK32 used for card detection and for interruption detection
734 * when HCLK is stopped.
735 */
736 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
737 msleep(1);
738
739 /* HCLK 24.576 MHz, BCLK 12.288 MHz: */
740 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
741 CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL);
742
743 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
744 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
745 msleep(1);
746
747 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
748 ASIC3_EXTCF_SD_MEM_ENABLE, 1);
749
750 /* Enable SD card slot 3.3V power supply */
751 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
752 ASIC3_SDHWCTRL_SDPWR, 1);
753
754 /* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */
755 tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift,
756 ASIC3_SD_CTRL_BASE >> 1);
757
758 return 0;
759 }
760
761 static int asic3_mmc_disable(struct platform_device *pdev)
762 {
763 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
764
765 /* Put in suspend mode */
766 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
767 ASIC3_SDHWCTRL_SUSPEND, 1);
768
769 /* Disable clocks */
770 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
771 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
772 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
773 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
774 return 0;
775 }
776
777 static struct mfd_cell asic3_cell_mmc = {
778 .name = "tmio-mmc",
779 .enable = asic3_mmc_enable,
780 .disable = asic3_mmc_disable,
781 .platform_data = &asic3_mmc_data,
782 .pdata_size = sizeof(asic3_mmc_data),
783 .num_resources = ARRAY_SIZE(asic3_mmc_resources),
784 .resources = asic3_mmc_resources,
785 };
786
787 static const int clock_ledn[ASIC3_NUM_LEDS] = {
788 [0] = ASIC3_CLOCK_LED0,
789 [1] = ASIC3_CLOCK_LED1,
790 [2] = ASIC3_CLOCK_LED2,
791 };
792
793 static int asic3_leds_enable(struct platform_device *pdev)
794 {
795 const struct mfd_cell *cell = mfd_get_cell(pdev);
796 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
797
798 asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]);
799
800 return 0;
801 }
802
803 static int asic3_leds_disable(struct platform_device *pdev)
804 {
805 const struct mfd_cell *cell = mfd_get_cell(pdev);
806 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
807
808 asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
809
810 return 0;
811 }
812
813 static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
814 [0] = {
815 .name = "leds-asic3",
816 .id = 0,
817 .enable = asic3_leds_enable,
818 .disable = asic3_leds_disable,
819 },
820 [1] = {
821 .name = "leds-asic3",
822 .id = 1,
823 .enable = asic3_leds_enable,
824 .disable = asic3_leds_disable,
825 },
826 [2] = {
827 .name = "leds-asic3",
828 .id = 2,
829 .enable = asic3_leds_enable,
830 .disable = asic3_leds_disable,
831 },
832 };
833
834 static int __init asic3_mfd_probe(struct platform_device *pdev,
835 struct asic3_platform_data *pdata,
836 struct resource *mem)
837 {
838 struct asic3 *asic = platform_get_drvdata(pdev);
839 struct resource *mem_sdio;
840 int irq, ret;
841
842 mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1);
843 if (!mem_sdio)
844 dev_dbg(asic->dev, "no SDIO MEM resource\n");
845
846 irq = platform_get_irq(pdev, 1);
847 if (irq < 0)
848 dev_dbg(asic->dev, "no SDIO IRQ resource\n");
849
850 /* DS1WM */
851 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
852 ASIC3_EXTCF_OWM_SMB, 0);
853
854 ds1wm_resources[0].start >>= asic->bus_shift;
855 ds1wm_resources[0].end >>= asic->bus_shift;
856
857 /* MMC */
858 asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) +
859 mem_sdio->start, 0x400 >> asic->bus_shift);
860 if (!asic->tmio_cnf) {
861 ret = -ENOMEM;
862 dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n");
863 goto out;
864 }
865 asic3_mmc_resources[0].start >>= asic->bus_shift;
866 asic3_mmc_resources[0].end >>= asic->bus_shift;
867
868 ret = mfd_add_devices(&pdev->dev, pdev->id,
869 &asic3_cell_ds1wm, 1, mem, asic->irq_base);
870 if (ret < 0)
871 goto out;
872
873 if (mem_sdio && (irq >= 0)) {
874 ret = mfd_add_devices(&pdev->dev, pdev->id,
875 &asic3_cell_mmc, 1, mem_sdio, irq);
876 if (ret < 0)
877 goto out;
878 }
879
880 if (pdata->leds) {
881 int i;
882
883 for (i = 0; i < ASIC3_NUM_LEDS; ++i) {
884 asic3_cell_leds[i].platform_data = &pdata->leds[i];
885 asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]);
886 }
887 ret = mfd_add_devices(&pdev->dev, 0,
888 asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0);
889 }
890
891 out:
892 return ret;
893 }
894
895 static void asic3_mfd_remove(struct platform_device *pdev)
896 {
897 struct asic3 *asic = platform_get_drvdata(pdev);
898
899 mfd_remove_devices(&pdev->dev);
900 iounmap(asic->tmio_cnf);
901 }
902
903 /* Core */
904 static int __init asic3_probe(struct platform_device *pdev)
905 {
906 struct asic3_platform_data *pdata = pdev->dev.platform_data;
907 struct asic3 *asic;
908 struct resource *mem;
909 unsigned long clksel;
910 int ret = 0;
911
912 asic = kzalloc(sizeof(struct asic3), GFP_KERNEL);
913 if (asic == NULL) {
914 printk(KERN_ERR "kzalloc failed\n");
915 return -ENOMEM;
916 }
917
918 spin_lock_init(&asic->lock);
919 platform_set_drvdata(pdev, asic);
920 asic->dev = &pdev->dev;
921
922 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
923 if (!mem) {
924 ret = -ENOMEM;
925 dev_err(asic->dev, "no MEM resource\n");
926 goto out_free;
927 }
928
929 asic->mapping = ioremap(mem->start, resource_size(mem));
930 if (!asic->mapping) {
931 ret = -ENOMEM;
932 dev_err(asic->dev, "Couldn't ioremap\n");
933 goto out_free;
934 }
935
936 asic->irq_base = pdata->irq_base;
937
938 /* calculate bus shift from mem resource */
939 asic->bus_shift = 2 - (resource_size(mem) >> 12);
940
941 clksel = 0;
942 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);
943
944 ret = asic3_irq_probe(pdev);
945 if (ret < 0) {
946 dev_err(asic->dev, "Couldn't probe IRQs\n");
947 goto out_unmap;
948 }
949
950 asic->gpio.base = pdata->gpio_base;
951 asic->gpio.ngpio = ASIC3_NUM_GPIOS;
952 asic->gpio.get = asic3_gpio_get;
953 asic->gpio.set = asic3_gpio_set;
954 asic->gpio.direction_input = asic3_gpio_direction_input;
955 asic->gpio.direction_output = asic3_gpio_direction_output;
956
957 ret = asic3_gpio_probe(pdev,
958 pdata->gpio_config,
959 pdata->gpio_config_num);
960 if (ret < 0) {
961 dev_err(asic->dev, "GPIO probe failed\n");
962 goto out_irq;
963 }
964
965 /* Making a per-device copy is only needed for the
966 * theoretical case of multiple ASIC3s on one board:
967 */
968 memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
969
970 asic3_mfd_probe(pdev, pdata, mem);
971
972 dev_info(asic->dev, "ASIC3 Core driver\n");
973
974 return 0;
975
976 out_irq:
977 asic3_irq_remove(pdev);
978
979 out_unmap:
980 iounmap(asic->mapping);
981
982 out_free:
983 kfree(asic);
984
985 return ret;
986 }
987
988 static int __devexit asic3_remove(struct platform_device *pdev)
989 {
990 int ret;
991 struct asic3 *asic = platform_get_drvdata(pdev);
992
993 asic3_mfd_remove(pdev);
994
995 ret = asic3_gpio_remove(pdev);
996 if (ret < 0)
997 return ret;
998 asic3_irq_remove(pdev);
999
1000 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0);
1001
1002 iounmap(asic->mapping);
1003
1004 kfree(asic);
1005
1006 return 0;
1007 }
1008
1009 static void asic3_shutdown(struct platform_device *pdev)
1010 {
1011 }
1012
1013 static struct platform_driver asic3_device_driver = {
1014 .driver = {
1015 .name = "asic3",
1016 },
1017 .remove = __devexit_p(asic3_remove),
1018 .shutdown = asic3_shutdown,
1019 };
1020
1021 static int __init asic3_init(void)
1022 {
1023 int retval = 0;
1024 retval = platform_driver_probe(&asic3_device_driver, asic3_probe);
1025 return retval;
1026 }
1027
1028 subsys_initcall(asic3_init);
Linux kernel - Deliverables
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