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include: replace linux/module.h with "struct module" wherever possible
[linux-2.6/next.git] / drivers / mfd / asic3.c
blob7d5497388a302a5d083641b1816b2d27946edc06
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/export.h>
24 #include <linux/io.h>
25 #include <linux/slab.h>
26 #include <linux/spinlock.h>
27 #include <linux/platform_device.h>
28
29 #include <linux/mfd/asic3.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/ds1wm.h>
32 #include <linux/mfd/tmio.h>
33
34 enum {
35 ASIC3_CLOCK_SPI,
36 ASIC3_CLOCK_OWM,
37 ASIC3_CLOCK_PWM0,
38 ASIC3_CLOCK_PWM1,
39 ASIC3_CLOCK_LED0,
40 ASIC3_CLOCK_LED1,
41 ASIC3_CLOCK_LED2,
42 ASIC3_CLOCK_SD_HOST,
43 ASIC3_CLOCK_SD_BUS,
44 ASIC3_CLOCK_SMBUS,
45 ASIC3_CLOCK_EX0,
46 ASIC3_CLOCK_EX1,
47 };
48
49 struct asic3_clk {
50 int enabled;
51 unsigned int cdex;
52 unsigned long rate;
53 };
54
55 #define INIT_CDEX(_name, _rate) \
56 [ASIC3_CLOCK_##_name] = { \
57 .cdex = CLOCK_CDEX_##_name, \
58 .rate = _rate, \
59 }
60
61 static struct asic3_clk asic3_clk_init[] __initdata = {
62 INIT_CDEX(SPI, 0),
63 INIT_CDEX(OWM, 5000000),
64 INIT_CDEX(PWM0, 0),
65 INIT_CDEX(PWM1, 0),
66 INIT_CDEX(LED0, 0),
67 INIT_CDEX(LED1, 0),
68 INIT_CDEX(LED2, 0),
69 INIT_CDEX(SD_HOST, 24576000),
70 INIT_CDEX(SD_BUS, 12288000),
71 INIT_CDEX(SMBUS, 0),
72 INIT_CDEX(EX0, 32768),
73 INIT_CDEX(EX1, 24576000),
74 };
75
76 struct asic3 {
77 void __iomem *mapping;
78 unsigned int bus_shift;
79 unsigned int irq_nr;
80 unsigned int irq_base;
81 spinlock_t lock;
82 u16 irq_bothedge[4];
83 struct gpio_chip gpio;
84 struct device *dev;
85 void __iomem *tmio_cnf;
86
87 struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)];
88 };
89
90 static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
91
92 void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)
93 {
94 iowrite16(value, asic->mapping +
95 (reg >> asic->bus_shift));
96 }
97 EXPORT_SYMBOL_GPL(asic3_write_register);
98
99 u32 asic3_read_register(struct asic3 *asic, unsigned int reg)
100 {
101 return ioread16(asic->mapping +
102 (reg >> asic->bus_shift));
103 }
104 EXPORT_SYMBOL_GPL(asic3_read_register);
105
106 static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set)
107 {
108 unsigned long flags;
109 u32 val;
110
111 spin_lock_irqsave(&asic->lock, flags);
112 val = asic3_read_register(asic, reg);
113 if (set)
114 val |= bits;
115 else
116 val &= ~bits;
117 asic3_write_register(asic, reg, val);
118 spin_unlock_irqrestore(&asic->lock, flags);
119 }
120
121 /* IRQs */
122 #define MAX_ASIC_ISR_LOOPS 20
123 #define ASIC3_GPIO_BASE_INCR \
124 (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE)
125
126 static void asic3_irq_flip_edge(struct asic3 *asic,
127 u32 base, int bit)
128 {
129 u16 edge;
130 unsigned long flags;
131
132 spin_lock_irqsave(&asic->lock, flags);
133 edge = asic3_read_register(asic,
134 base + ASIC3_GPIO_EDGE_TRIGGER);
135 edge ^= bit;
136 asic3_write_register(asic,
137 base + ASIC3_GPIO_EDGE_TRIGGER, edge);
138 spin_unlock_irqrestore(&asic->lock, flags);
139 }
140
141 static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc)
142 {
143 struct asic3 *asic = irq_desc_get_handler_data(desc);
144 struct irq_data *data = irq_desc_get_irq_data(desc);
145 int iter, i;
146 unsigned long flags;
147
148 data->chip->irq_ack(data);
149
150 for (iter = 0 ; iter < MAX_ASIC_ISR_LOOPS; iter++) {
151 u32 status;
152 int bank;
153
154 spin_lock_irqsave(&asic->lock, flags);
155 status = asic3_read_register(asic,
156 ASIC3_OFFSET(INTR, P_INT_STAT));
157 spin_unlock_irqrestore(&asic->lock, flags);
158
159 /* Check all ten register bits */
160 if ((status & 0x3ff) == 0)
161 break;
162
163 /* Handle GPIO IRQs */
164 for (bank = 0; bank < ASIC3_NUM_GPIO_BANKS; bank++) {
165 if (status & (1 << bank)) {
166 unsigned long base, istat;
167
168 base = ASIC3_GPIO_A_BASE
169 + bank * ASIC3_GPIO_BASE_INCR;
170
171 spin_lock_irqsave(&asic->lock, flags);
172 istat = asic3_read_register(asic,
173 base +
174 ASIC3_GPIO_INT_STATUS);
175 /* Clearing IntStatus */
176 asic3_write_register(asic,
177 base +
178 ASIC3_GPIO_INT_STATUS, 0);
179 spin_unlock_irqrestore(&asic->lock, flags);
180
181 for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) {
182 int bit = (1 << i);
183 unsigned int irqnr;
184
185 if (!(istat & bit))
186 continue;
187
188 irqnr = asic->irq_base +
189 (ASIC3_GPIOS_PER_BANK * bank)
190 + i;
191 generic_handle_irq(irqnr);
192 if (asic->irq_bothedge[bank] & bit)
193 asic3_irq_flip_edge(asic, base,
194 bit);
195 }
196 }
197 }
198
199 /* Handle remaining IRQs in the status register */
200 for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) {
201 /* They start at bit 4 and go up */
202 if (status & (1 << (i - ASIC3_NUM_GPIOS + 4)))
203 generic_handle_irq(asic->irq_base + i);
204 }
205 }
206
207 if (iter >= MAX_ASIC_ISR_LOOPS)
208 dev_err(asic->dev, "interrupt processing overrun\n");
209 }
210
211 static inline int asic3_irq_to_bank(struct asic3 *asic, int irq)
212 {
213 int n;
214
215 n = (irq - asic->irq_base) >> 4;
216
217 return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE));
218 }
219
220 static inline int asic3_irq_to_index(struct asic3 *asic, int irq)
221 {
222 return (irq - asic->irq_base) & 0xf;
223 }
224
225 static void asic3_mask_gpio_irq(struct irq_data *data)
226 {
227 struct asic3 *asic = irq_data_get_irq_chip_data(data);
228 u32 val, bank, index;
229 unsigned long flags;
230
231 bank = asic3_irq_to_bank(asic, data->irq);
232 index = asic3_irq_to_index(asic, data->irq);
233
234 spin_lock_irqsave(&asic->lock, flags);
235 val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
236 val |= 1 << index;
237 asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
238 spin_unlock_irqrestore(&asic->lock, flags);
239 }
240
241 static void asic3_mask_irq(struct irq_data *data)
242 {
243 struct asic3 *asic = irq_data_get_irq_chip_data(data);
244 int regval;
245 unsigned long flags;
246
247 spin_lock_irqsave(&asic->lock, flags);
248 regval = asic3_read_register(asic,
249 ASIC3_INTR_BASE +
250 ASIC3_INTR_INT_MASK);
251
252 regval &= ~(ASIC3_INTMASK_MASK0 <<
253 (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
254
255 asic3_write_register(asic,
256 ASIC3_INTR_BASE +
257 ASIC3_INTR_INT_MASK,
258 regval);
259 spin_unlock_irqrestore(&asic->lock, flags);
260 }
261
262 static void asic3_unmask_gpio_irq(struct irq_data *data)
263 {
264 struct asic3 *asic = irq_data_get_irq_chip_data(data);
265 u32 val, bank, index;
266 unsigned long flags;
267
268 bank = asic3_irq_to_bank(asic, data->irq);
269 index = asic3_irq_to_index(asic, data->irq);
270
271 spin_lock_irqsave(&asic->lock, flags);
272 val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
273 val &= ~(1 << index);
274 asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
275 spin_unlock_irqrestore(&asic->lock, flags);
276 }
277
278 static void asic3_unmask_irq(struct irq_data *data)
279 {
280 struct asic3 *asic = irq_data_get_irq_chip_data(data);
281 int regval;
282 unsigned long flags;
283
284 spin_lock_irqsave(&asic->lock, flags);
285 regval = asic3_read_register(asic,
286 ASIC3_INTR_BASE +
287 ASIC3_INTR_INT_MASK);
288
289 regval |= (ASIC3_INTMASK_MASK0 <<
290 (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
291
292 asic3_write_register(asic,
293 ASIC3_INTR_BASE +
294 ASIC3_INTR_INT_MASK,
295 regval);
296 spin_unlock_irqrestore(&asic->lock, flags);
297 }
298
299 static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type)
300 {
301 struct asic3 *asic = irq_data_get_irq_chip_data(data);
302 u32 bank, index;
303 u16 trigger, level, edge, bit;
304 unsigned long flags;
305
306 bank = asic3_irq_to_bank(asic, data->irq);
307 index = asic3_irq_to_index(asic, data->irq);
308 bit = 1<<index;
309
310 spin_lock_irqsave(&asic->lock, flags);
311 level = asic3_read_register(asic,
312 bank + ASIC3_GPIO_LEVEL_TRIGGER);
313 edge = asic3_read_register(asic,
314 bank + ASIC3_GPIO_EDGE_TRIGGER);
315 trigger = asic3_read_register(asic,
316 bank + ASIC3_GPIO_TRIGGER_TYPE);
317 asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] &= ~bit;
318
319 if (type == IRQ_TYPE_EDGE_RISING) {
320 trigger |= bit;
321 edge |= bit;
322 } else if (type == IRQ_TYPE_EDGE_FALLING) {
323 trigger |= bit;
324 edge &= ~bit;
325 } else if (type == IRQ_TYPE_EDGE_BOTH) {
326 trigger |= bit;
327 if (asic3_gpio_get(&asic->gpio, data->irq - asic->irq_base))
328 edge &= ~bit;
329 else
330 edge |= bit;
331 asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] |= bit;
332 } else if (type == IRQ_TYPE_LEVEL_LOW) {
333 trigger &= ~bit;
334 level &= ~bit;
335 } else if (type == IRQ_TYPE_LEVEL_HIGH) {
336 trigger &= ~bit;
337 level |= bit;
338 } else {
339 /*
340 * if type == IRQ_TYPE_NONE, we should mask interrupts, but
341 * be careful to not unmask them if mask was also called.
342 * Probably need internal state for mask.
343 */
344 dev_notice(asic->dev, "irq type not changed\n");
345 }
346 asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER,
347 level);
348 asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER,
349 edge);
350 asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE,
351 trigger);
352 spin_unlock_irqrestore(&asic->lock, flags);
353 return 0;
354 }
355
356 static struct irq_chip asic3_gpio_irq_chip = {
357 .name = "ASIC3-GPIO",
358 .irq_ack = asic3_mask_gpio_irq,
359 .irq_mask = asic3_mask_gpio_irq,
360 .irq_unmask = asic3_unmask_gpio_irq,
361 .irq_set_type = asic3_gpio_irq_type,
362 };
363
364 static struct irq_chip asic3_irq_chip = {
365 .name = "ASIC3",
366 .irq_ack = asic3_mask_irq,
367 .irq_mask = asic3_mask_irq,
368 .irq_unmask = asic3_unmask_irq,
369 };
370
371 static int __init asic3_irq_probe(struct platform_device *pdev)
372 {
373 struct asic3 *asic = platform_get_drvdata(pdev);
374 unsigned long clksel = 0;
375 unsigned int irq, irq_base;
376 int ret;
377
378 ret = platform_get_irq(pdev, 0);
379 if (ret < 0)
380 return ret;
381 asic->irq_nr = ret;
382
383 /* turn on clock to IRQ controller */
384 clksel |= CLOCK_SEL_CX;
385 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
386 clksel);
387
388 irq_base = asic->irq_base;
389
390 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
391 if (irq < asic->irq_base + ASIC3_NUM_GPIOS)
392 irq_set_chip(irq, &asic3_gpio_irq_chip);
393 else
394 irq_set_chip(irq, &asic3_irq_chip);
395
396 irq_set_chip_data(irq, asic);
397 irq_set_handler(irq, handle_level_irq);
398 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
399 }
400
401 asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
402 ASIC3_INTMASK_GINTMASK);
403
404 irq_set_chained_handler(asic->irq_nr, asic3_irq_demux);
405 irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING);
406 irq_set_handler_data(asic->irq_nr, asic);
407
408 return 0;
409 }
410
411 static void asic3_irq_remove(struct platform_device *pdev)
412 {
413 struct asic3 *asic = platform_get_drvdata(pdev);
414 unsigned int irq, irq_base;
415
416 irq_base = asic->irq_base;
417
418 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
419 set_irq_flags(irq, 0);
420 irq_set_chip_and_handler(irq, NULL, NULL);
421 irq_set_chip_data(irq, NULL);
422 }
423 irq_set_chained_handler(asic->irq_nr, NULL);
424 }
425
426 /* GPIOs */
427 static int asic3_gpio_direction(struct gpio_chip *chip,
428 unsigned offset, int out)
429 {
430 u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg;
431 unsigned int gpio_base;
432 unsigned long flags;
433 struct asic3 *asic;
434
435 asic = container_of(chip, struct asic3, gpio);
436 gpio_base = ASIC3_GPIO_TO_BASE(offset);
437
438 if (gpio_base > ASIC3_GPIO_D_BASE) {
439 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
440 gpio_base, offset);
441 return -EINVAL;
442 }
443
444 spin_lock_irqsave(&asic->lock, flags);
445
446 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION);
447
448 /* Input is 0, Output is 1 */
449 if (out)
450 out_reg |= mask;
451 else
452 out_reg &= ~mask;
453
454 asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg);
455
456 spin_unlock_irqrestore(&asic->lock, flags);
457
458 return 0;
459
460 }
461
462 static int asic3_gpio_direction_input(struct gpio_chip *chip,
463 unsigned offset)
464 {
465 return asic3_gpio_direction(chip, offset, 0);
466 }
467
468 static int asic3_gpio_direction_output(struct gpio_chip *chip,
469 unsigned offset, int value)
470 {
471 return asic3_gpio_direction(chip, offset, 1);
472 }
473
474 static int asic3_gpio_get(struct gpio_chip *chip,
475 unsigned offset)
476 {
477 unsigned int gpio_base;
478 u32 mask = ASIC3_GPIO_TO_MASK(offset);
479 struct asic3 *asic;
480
481 asic = container_of(chip, struct asic3, gpio);
482 gpio_base = ASIC3_GPIO_TO_BASE(offset);
483
484 if (gpio_base > ASIC3_GPIO_D_BASE) {
485 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
486 gpio_base, offset);
487 return -EINVAL;
488 }
489
490 return asic3_read_register(asic, gpio_base + ASIC3_GPIO_STATUS) & mask;
491 }
492
493 static void asic3_gpio_set(struct gpio_chip *chip,
494 unsigned offset, int value)
495 {
496 u32 mask, out_reg;
497 unsigned int gpio_base;
498 unsigned long flags;
499 struct asic3 *asic;
500
501 asic = container_of(chip, struct asic3, gpio);
502 gpio_base = ASIC3_GPIO_TO_BASE(offset);
503
504 if (gpio_base > ASIC3_GPIO_D_BASE) {
505 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
506 gpio_base, offset);
507 return;
508 }
509
510 mask = ASIC3_GPIO_TO_MASK(offset);
511
512 spin_lock_irqsave(&asic->lock, flags);
513
514 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT);
515
516 if (value)
517 out_reg |= mask;
518 else
519 out_reg &= ~mask;
520
521 asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg);
522
523 spin_unlock_irqrestore(&asic->lock, flags);
524
525 return;
526 }
527
528 static __init int asic3_gpio_probe(struct platform_device *pdev,
529 u16 *gpio_config, int num)
530 {
531 struct asic3 *asic = platform_get_drvdata(pdev);
532 u16 alt_reg[ASIC3_NUM_GPIO_BANKS];
533 u16 out_reg[ASIC3_NUM_GPIO_BANKS];
534 u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
535 int i;
536
537 memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
538 memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
539 memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
540
541 /* Enable all GPIOs */
542 asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);
543 asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff);
544 asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff);
545 asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff);
546
547 for (i = 0; i < num; i++) {
548 u8 alt, pin, dir, init, bank_num, bit_num;
549 u16 config = gpio_config[i];
550
551 pin = ASIC3_CONFIG_GPIO_PIN(config);
552 alt = ASIC3_CONFIG_GPIO_ALT(config);
553 dir = ASIC3_CONFIG_GPIO_DIR(config);
554 init = ASIC3_CONFIG_GPIO_INIT(config);
555
556 bank_num = ASIC3_GPIO_TO_BANK(pin);
557 bit_num = ASIC3_GPIO_TO_BIT(pin);
558
559 alt_reg[bank_num] |= (alt << bit_num);
560 out_reg[bank_num] |= (init << bit_num);
561 dir_reg[bank_num] |= (dir << bit_num);
562 }
563
564 for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) {
565 asic3_write_register(asic,
566 ASIC3_BANK_TO_BASE(i) +
567 ASIC3_GPIO_DIRECTION,
568 dir_reg[i]);
569 asic3_write_register(asic,
570 ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT,
571 out_reg[i]);
572 asic3_write_register(asic,
573 ASIC3_BANK_TO_BASE(i) +
574 ASIC3_GPIO_ALT_FUNCTION,
575 alt_reg[i]);
576 }
577
578 return gpiochip_add(&asic->gpio);
579 }
580
581 static int asic3_gpio_remove(struct platform_device *pdev)
582 {
583 struct asic3 *asic = platform_get_drvdata(pdev);
584
585 return gpiochip_remove(&asic->gpio);
586 }
587
588 static int asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk)
589 {
590 unsigned long flags;
591 u32 cdex;
592
593 spin_lock_irqsave(&asic->lock, flags);
594 if (clk->enabled++ == 0) {
595 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
596 cdex |= clk->cdex;
597 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
598 }
599 spin_unlock_irqrestore(&asic->lock, flags);
600
601 return 0;
602 }
603
604 static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
605 {
606 unsigned long flags;
607 u32 cdex;
608
609 WARN_ON(clk->enabled == 0);
610
611 spin_lock_irqsave(&asic->lock, flags);
612 if (--clk->enabled == 0) {
613 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
614 cdex &= ~clk->cdex;
615 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
616 }
617 spin_unlock_irqrestore(&asic->lock, flags);
618 }
619
620 /* MFD cells (SPI, PWM, LED, DS1WM, MMC) */
621 static struct ds1wm_driver_data ds1wm_pdata = {
622 .active_high = 1,
623 .reset_recover_delay = 1,
624 };
625
626 static struct resource ds1wm_resources[] = {
627 {
628 .start = ASIC3_OWM_BASE,
629 .end = ASIC3_OWM_BASE + 0x13,
630 .flags = IORESOURCE_MEM,
631 },
632 {
633 .start = ASIC3_IRQ_OWM,
634 .end = ASIC3_IRQ_OWM,
635 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
636 },
637 };
638
639 static int ds1wm_enable(struct platform_device *pdev)
640 {
641 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
642
643 /* Turn on external clocks and the OWM clock */
644 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
645 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
646 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
647 msleep(1);
648
649 /* Reset and enable DS1WM */
650 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
651 ASIC3_EXTCF_OWM_RESET, 1);
652 msleep(1);
653 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
654 ASIC3_EXTCF_OWM_RESET, 0);
655 msleep(1);
656 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
657 ASIC3_EXTCF_OWM_EN, 1);
658 msleep(1);
659
660 return 0;
661 }
662
663 static int ds1wm_disable(struct platform_device *pdev)
664 {
665 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
666
667 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
668 ASIC3_EXTCF_OWM_EN, 0);
669
670 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
671 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
672 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
673
674 return 0;
675 }
676
677 static struct mfd_cell asic3_cell_ds1wm = {
678 .name = "ds1wm",
679 .enable = ds1wm_enable,
680 .disable = ds1wm_disable,
681 .platform_data = &ds1wm_pdata,
682 .pdata_size = sizeof(ds1wm_pdata),
683 .num_resources = ARRAY_SIZE(ds1wm_resources),
684 .resources = ds1wm_resources,
685 };
686
687 static void asic3_mmc_pwr(struct platform_device *pdev, int state)
688 {
689 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
690
691 tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state);
692 }
693
694 static void asic3_mmc_clk_div(struct platform_device *pdev, int state)
695 {
696 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
697
698 tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state);
699 }
700
701 static struct tmio_mmc_data asic3_mmc_data = {
702 .hclk = 24576000,
703 .set_pwr = asic3_mmc_pwr,
704 .set_clk_div = asic3_mmc_clk_div,
705 };
706
707 static struct resource asic3_mmc_resources[] = {
708 {
709 .start = ASIC3_SD_CTRL_BASE,
710 .end = ASIC3_SD_CTRL_BASE + 0x3ff,
711 .flags = IORESOURCE_MEM,
712 },
713 {
714 .start = 0,
715 .end = 0,
716 .flags = IORESOURCE_IRQ,
717 },
718 };
719
720 static int asic3_mmc_enable(struct platform_device *pdev)
721 {
722 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
723
724 /* Not sure if it must be done bit by bit, but leaving as-is */
725 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
726 ASIC3_SDHWCTRL_LEVCD, 1);
727 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
728 ASIC3_SDHWCTRL_LEVWP, 1);
729 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
730 ASIC3_SDHWCTRL_SUSPEND, 0);
731 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
732 ASIC3_SDHWCTRL_PCLR, 0);
733
734 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
735 /* CLK32 used for card detection and for interruption detection
736 * when HCLK is stopped.
737 */
738 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
739 msleep(1);
740
741 /* HCLK 24.576 MHz, BCLK 12.288 MHz: */
742 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
743 CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL);
744
745 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
746 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
747 msleep(1);
748
749 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
750 ASIC3_EXTCF_SD_MEM_ENABLE, 1);
751
752 /* Enable SD card slot 3.3V power supply */
753 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
754 ASIC3_SDHWCTRL_SDPWR, 1);
755
756 /* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */
757 tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift,
758 ASIC3_SD_CTRL_BASE >> 1);
759
760 return 0;
761 }
762
763 static int asic3_mmc_disable(struct platform_device *pdev)
764 {
765 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
766
767 /* Put in suspend mode */
768 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
769 ASIC3_SDHWCTRL_SUSPEND, 1);
770
771 /* Disable clocks */
772 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
773 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
774 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
775 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
776 return 0;
777 }
778
779 static struct mfd_cell asic3_cell_mmc = {
780 .name = "tmio-mmc",
781 .enable = asic3_mmc_enable,
782 .disable = asic3_mmc_disable,
783 .platform_data = &asic3_mmc_data,
784 .pdata_size = sizeof(asic3_mmc_data),
785 .num_resources = ARRAY_SIZE(asic3_mmc_resources),
786 .resources = asic3_mmc_resources,
787 };
788
789 static const int clock_ledn[ASIC3_NUM_LEDS] = {
790 [0] = ASIC3_CLOCK_LED0,
791 [1] = ASIC3_CLOCK_LED1,
792 [2] = ASIC3_CLOCK_LED2,
793 };
794
795 static int asic3_leds_enable(struct platform_device *pdev)
796 {
797 const struct mfd_cell *cell = mfd_get_cell(pdev);
798 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
799
800 asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]);
801
802 return 0;
803 }
804
805 static int asic3_leds_disable(struct platform_device *pdev)
806 {
807 const struct mfd_cell *cell = mfd_get_cell(pdev);
808 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
809
810 asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
811
812 return 0;
813 }
814
815 static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
816 [0] = {
817 .name = "leds-asic3",
818 .id = 0,
819 .enable = asic3_leds_enable,
820 .disable = asic3_leds_disable,
821 },
822 [1] = {
823 .name = "leds-asic3",
824 .id = 1,
825 .enable = asic3_leds_enable,
826 .disable = asic3_leds_disable,
827 },
828 [2] = {
829 .name = "leds-asic3",
830 .id = 2,
831 .enable = asic3_leds_enable,
832 .disable = asic3_leds_disable,
833 },
834 };
835
836 static int __init asic3_mfd_probe(struct platform_device *pdev,
837 struct asic3_platform_data *pdata,
838 struct resource *mem)
839 {
840 struct asic3 *asic = platform_get_drvdata(pdev);
841 struct resource *mem_sdio;
842 int irq, ret;
843
844 mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1);
845 if (!mem_sdio)
846 dev_dbg(asic->dev, "no SDIO MEM resource\n");
847
848 irq = platform_get_irq(pdev, 1);
849 if (irq < 0)
850 dev_dbg(asic->dev, "no SDIO IRQ resource\n");
851
852 /* DS1WM */
853 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
854 ASIC3_EXTCF_OWM_SMB, 0);
855
856 ds1wm_resources[0].start >>= asic->bus_shift;
857 ds1wm_resources[0].end >>= asic->bus_shift;
858
859 /* MMC */
860 asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) +
861 mem_sdio->start,
862 ASIC3_SD_CONFIG_SIZE >> asic->bus_shift);
863 if (!asic->tmio_cnf) {
864 ret = -ENOMEM;
865 dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n");
866 goto out;
867 }
868 asic3_mmc_resources[0].start >>= asic->bus_shift;
869 asic3_mmc_resources[0].end >>= asic->bus_shift;
870
871 ret = mfd_add_devices(&pdev->dev, pdev->id,
872 &asic3_cell_ds1wm, 1, mem, asic->irq_base);
873 if (ret < 0)
874 goto out;
875
876 if (mem_sdio && (irq >= 0)) {
877 ret = mfd_add_devices(&pdev->dev, pdev->id,
878 &asic3_cell_mmc, 1, mem_sdio, irq);
879 if (ret < 0)
880 goto out;
881 }
882
883 if (pdata->leds) {
884 int i;
885
886 for (i = 0; i < ASIC3_NUM_LEDS; ++i) {
887 asic3_cell_leds[i].platform_data = &pdata->leds[i];
888 asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]);
889 }
890 ret = mfd_add_devices(&pdev->dev, 0,
891 asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0);
892 }
893
894 out:
895 return ret;
896 }
897
898 static void asic3_mfd_remove(struct platform_device *pdev)
899 {
900 struct asic3 *asic = platform_get_drvdata(pdev);
901
902 mfd_remove_devices(&pdev->dev);
903 iounmap(asic->tmio_cnf);
904 }
905
906 /* Core */
907 static int __init asic3_probe(struct platform_device *pdev)
908 {
909 struct asic3_platform_data *pdata = pdev->dev.platform_data;
910 struct asic3 *asic;
911 struct resource *mem;
912 unsigned long clksel;
913 int ret = 0;
914
915 asic = kzalloc(sizeof(struct asic3), GFP_KERNEL);
916 if (asic == NULL) {
917 printk(KERN_ERR "kzalloc failed\n");
918 return -ENOMEM;
919 }
920
921 spin_lock_init(&asic->lock);
922 platform_set_drvdata(pdev, asic);
923 asic->dev = &pdev->dev;
924
925 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
926 if (!mem) {
927 ret = -ENOMEM;
928 dev_err(asic->dev, "no MEM resource\n");
929 goto out_free;
930 }
931
932 asic->mapping = ioremap(mem->start, resource_size(mem));
933 if (!asic->mapping) {
934 ret = -ENOMEM;
935 dev_err(asic->dev, "Couldn't ioremap\n");
936 goto out_free;
937 }
938
939 asic->irq_base = pdata->irq_base;
940
941 /* calculate bus shift from mem resource */
942 asic->bus_shift = 2 - (resource_size(mem) >> 12);
943
944 clksel = 0;
945 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);
946
947 ret = asic3_irq_probe(pdev);
948 if (ret < 0) {
949 dev_err(asic->dev, "Couldn't probe IRQs\n");
950 goto out_unmap;
951 }
952
953 asic->gpio.base = pdata->gpio_base;
954 asic->gpio.ngpio = ASIC3_NUM_GPIOS;
955 asic->gpio.get = asic3_gpio_get;
956 asic->gpio.set = asic3_gpio_set;
957 asic->gpio.direction_input = asic3_gpio_direction_input;
958 asic->gpio.direction_output = asic3_gpio_direction_output;
959
960 ret = asic3_gpio_probe(pdev,
961 pdata->gpio_config,
962 pdata->gpio_config_num);
963 if (ret < 0) {
964 dev_err(asic->dev, "GPIO probe failed\n");
965 goto out_irq;
966 }
967
968 /* Making a per-device copy is only needed for the
969 * theoretical case of multiple ASIC3s on one board:
970 */
971 memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
972
973 asic3_mfd_probe(pdev, pdata, mem);
974
975 dev_info(asic->dev, "ASIC3 Core driver\n");
976
977 return 0;
978
979 out_irq:
980 asic3_irq_remove(pdev);
981
982 out_unmap:
983 iounmap(asic->mapping);
984
985 out_free:
986 kfree(asic);
987
988 return ret;
989 }
990
991 static int __devexit asic3_remove(struct platform_device *pdev)
992 {
993 int ret;
994 struct asic3 *asic = platform_get_drvdata(pdev);
995
996 asic3_mfd_remove(pdev);
997
998 ret = asic3_gpio_remove(pdev);
999 if (ret < 0)
1000 return ret;
1001 asic3_irq_remove(pdev);
1002
1003 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0);
1004
1005 iounmap(asic->mapping);
1006
1007 kfree(asic);
1008
1009 return 0;
1010 }
1011
1012 static void asic3_shutdown(struct platform_device *pdev)
1013 {
1014 }
1015
1016 static struct platform_driver asic3_device_driver = {
1017 .driver = {
1018 .name = "asic3",
1019 },
1020 .remove = __devexit_p(asic3_remove),
1021 .shutdown = asic3_shutdown,
1022 };
1023
1024 static int __init asic3_init(void)
1025 {
1026 int retval = 0;
1027 retval = platform_driver_probe(&asic3_device_driver, asic3_probe);
1028 return retval;
1029 }
1030
1031 subsys_initcall(asic3_init);
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