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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * driver/mfd/asic3.c
4 *
5 * Compaq ASIC3 support.
6 *
7 * Copyright 2001 Compaq Computer Corporation.
8 * Copyright 2004-2005 Phil Blundell
9 * Copyright 2007-2008 OpenedHand Ltd.
10 *
11 * Authors: Phil Blundell <pb@handhelds.org>,
12 * Samuel Ortiz <sameo@openedhand.com>
13 */
14
15#include <linux/kernel.h>
16#include <linux/delay.h>
17#include <linux/irq.h>
18#include <linux/gpio/driver.h>
19#include <linux/export.h>
20#include <linux/io.h>
21#include <linux/slab.h>
22#include <linux/spinlock.h>
23#include <linux/platform_device.h>
24
25#include <linux/mfd/asic3.h>
26#include <linux/mfd/core.h>
27#include <linux/mfd/ds1wm.h>
28#include <linux/mfd/tmio.h>
29
30#include <linux/mmc/host.h>
31
32enum {
33 ASIC3_CLOCK_SPI,
34 ASIC3_CLOCK_OWM,
35 ASIC3_CLOCK_PWM0,
36 ASIC3_CLOCK_PWM1,
37 ASIC3_CLOCK_LED0,
38 ASIC3_CLOCK_LED1,
39 ASIC3_CLOCK_LED2,
40 ASIC3_CLOCK_SD_HOST,
41 ASIC3_CLOCK_SD_BUS,
42 ASIC3_CLOCK_SMBUS,
43 ASIC3_CLOCK_EX0,
44 ASIC3_CLOCK_EX1,
45};
46
47struct asic3_clk {
48 int enabled;
49 unsigned int cdex;
50 unsigned long rate;
51};
52
53#define INIT_CDEX(_name, _rate) \
54 [ASIC3_CLOCK_##_name] = { \
55 .cdex = CLOCK_CDEX_##_name, \
56 .rate = _rate, \
57 }
58
59static struct asic3_clk asic3_clk_init[] __initdata = {
60 INIT_CDEX(SPI, 0),
61 INIT_CDEX(OWM, 5000000),
62 INIT_CDEX(PWM0, 0),
63 INIT_CDEX(PWM1, 0),
64 INIT_CDEX(LED0, 0),
65 INIT_CDEX(LED1, 0),
66 INIT_CDEX(LED2, 0),
67 INIT_CDEX(SD_HOST, 24576000),
68 INIT_CDEX(SD_BUS, 12288000),
69 INIT_CDEX(SMBUS, 0),
70 INIT_CDEX(EX0, 32768),
71 INIT_CDEX(EX1, 24576000),
72};
73
74struct asic3 {
75 void __iomem *mapping;
76 unsigned int bus_shift;
77 unsigned int irq_nr;
78 unsigned int irq_base;
79 raw_spinlock_t lock;
80 u16 irq_bothedge[4];
81 struct gpio_chip gpio;
82 struct device *dev;
83 void __iomem *tmio_cnf;
84
85 struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)];
86};
87
88static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
89
90void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)
91{
92 iowrite16(value, asic->mapping +
93 (reg >> asic->bus_shift));
94}
95EXPORT_SYMBOL_GPL(asic3_write_register);
96
97u32 asic3_read_register(struct asic3 *asic, unsigned int reg)
98{
99 return ioread16(asic->mapping +
100 (reg >> asic->bus_shift));
101}
102EXPORT_SYMBOL_GPL(asic3_read_register);
103
104static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set)
105{
106 unsigned long flags;
107 u32 val;
108
109 raw_spin_lock_irqsave(&asic->lock, flags);
110 val = asic3_read_register(asic, reg);
111 if (set)
112 val |= bits;
113 else
114 val &= ~bits;
115 asic3_write_register(asic, reg, val);
116 raw_spin_unlock_irqrestore(&asic->lock, flags);
117}
118
119/* IRQs */
120#define MAX_ASIC_ISR_LOOPS 20
121#define ASIC3_GPIO_BASE_INCR \
122 (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE)
123
124static void asic3_irq_flip_edge(struct asic3 *asic,
125 u32 base, int bit)
126{
127 u16 edge;
128 unsigned long flags;
129
130 raw_spin_lock_irqsave(&asic->lock, flags);
131 edge = asic3_read_register(asic,
132 base + ASIC3_GPIO_EDGE_TRIGGER);
133 edge ^= bit;
134 asic3_write_register(asic,
135 base + ASIC3_GPIO_EDGE_TRIGGER, edge);
136 raw_spin_unlock_irqrestore(&asic->lock, flags);
137}
138
139static void asic3_irq_demux(struct irq_desc *desc)
140{
141 struct asic3 *asic = irq_desc_get_handler_data(desc);
142 struct irq_data *data = irq_desc_get_irq_data(desc);
143 int iter, i;
144 unsigned long flags;
145
146 data->chip->irq_ack(data);
147
148 for (iter = 0 ; iter < MAX_ASIC_ISR_LOOPS; iter++) {
149 u32 status;
150 int bank;
151
152 raw_spin_lock_irqsave(&asic->lock, flags);
153 status = asic3_read_register(asic,
154 ASIC3_OFFSET(INTR, P_INT_STAT));
155 raw_spin_unlock_irqrestore(&asic->lock, flags);
156
157 /* Check all ten register bits */
158 if ((status & 0x3ff) == 0)
159 break;
160
161 /* Handle GPIO IRQs */
162 for (bank = 0; bank < ASIC3_NUM_GPIO_BANKS; bank++) {
163 if (status & (1 << bank)) {
164 unsigned long base, istat;
165
166 base = ASIC3_GPIO_A_BASE
167 + bank * ASIC3_GPIO_BASE_INCR;
168 raw_spin_lock_irqsave(&asic->lock, flags);
169 istat = asic3_read_register(asic,
170 base +
171 ASIC3_GPIO_INT_STATUS);
172 /* Clearing IntStatus */
173 asic3_write_register(asic,
174 base +
175 ASIC3_GPIO_INT_STATUS, 0);
176 raw_spin_unlock_irqrestore(&asic->lock, flags);
177
178 for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) {
179 int bit = (1 << i);
180 unsigned int irqnr;
181
182 if (!(istat & bit))
183 continue;
184
185 irqnr = asic->irq_base +
186 (ASIC3_GPIOS_PER_BANK * bank)
187 + i;
188 generic_handle_irq(irqnr);
189 if (asic->irq_bothedge[bank] & bit)
190 asic3_irq_flip_edge(asic, base,
191 bit);
192 }
193 }
194 }
195
196 /* Handle remaining IRQs in the status register */
197 for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) {
198 /* They start at bit 4 and go up */
199 if (status & (1 << (i - ASIC3_NUM_GPIOS + 4)))
200 generic_handle_irq(asic->irq_base + i);
201 }
202 }
203
204 if (iter >= MAX_ASIC_ISR_LOOPS)
205 dev_err(asic->dev, "interrupt processing overrun\n");
206}
207
208static inline int asic3_irq_to_bank(struct asic3 *asic, int irq)
209{
210 int n;
211
212 n = (irq - asic->irq_base) >> 4;
213
214 return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE));
215}
216
217static inline int asic3_irq_to_index(struct asic3 *asic, int irq)
218{
219 return (irq - asic->irq_base) & 0xf;
220}
221
222static void asic3_mask_gpio_irq(struct irq_data *data)
223{
224 struct asic3 *asic = irq_data_get_irq_chip_data(data);
225 u32 val, bank, index;
226 unsigned long flags;
227
228 bank = asic3_irq_to_bank(asic, data->irq);
229 index = asic3_irq_to_index(asic, data->irq);
230
231 raw_spin_lock_irqsave(&asic->lock, flags);
232 val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
233 val |= 1 << index;
234 asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
235 raw_spin_unlock_irqrestore(&asic->lock, flags);
236}
237
238static void asic3_mask_irq(struct irq_data *data)
239{
240 struct asic3 *asic = irq_data_get_irq_chip_data(data);
241 int regval;
242 unsigned long flags;
243
244 raw_spin_lock_irqsave(&asic->lock, flags);
245 regval = asic3_read_register(asic,
246 ASIC3_INTR_BASE +
247 ASIC3_INTR_INT_MASK);
248
249 regval &= ~(ASIC3_INTMASK_MASK0 <<
250 (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
251
252 asic3_write_register(asic,
253 ASIC3_INTR_BASE +
254 ASIC3_INTR_INT_MASK,
255 regval);
256 raw_spin_unlock_irqrestore(&asic->lock, flags);
257}
258
259static void asic3_unmask_gpio_irq(struct irq_data *data)
260{
261 struct asic3 *asic = irq_data_get_irq_chip_data(data);
262 u32 val, bank, index;
263 unsigned long flags;
264
265 bank = asic3_irq_to_bank(asic, data->irq);
266 index = asic3_irq_to_index(asic, data->irq);
267
268 raw_spin_lock_irqsave(&asic->lock, flags);
269 val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
270 val &= ~(1 << index);
271 asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
272 raw_spin_unlock_irqrestore(&asic->lock, flags);
273}
274
275static void asic3_unmask_irq(struct irq_data *data)
276{
277 struct asic3 *asic = irq_data_get_irq_chip_data(data);
278 int regval;
279 unsigned long flags;
280
281 raw_spin_lock_irqsave(&asic->lock, flags);
282 regval = asic3_read_register(asic,
283 ASIC3_INTR_BASE +
284 ASIC3_INTR_INT_MASK);
285
286 regval |= (ASIC3_INTMASK_MASK0 <<
287 (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
288
289 asic3_write_register(asic,
290 ASIC3_INTR_BASE +
291 ASIC3_INTR_INT_MASK,
292 regval);
293 raw_spin_unlock_irqrestore(&asic->lock, flags);
294}
295
296static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type)
297{
298 struct asic3 *asic = irq_data_get_irq_chip_data(data);
299 u32 bank, index;
300 u16 trigger, level, edge, bit;
301 unsigned long flags;
302
303 bank = asic3_irq_to_bank(asic, data->irq);
304 index = asic3_irq_to_index(asic, data->irq);
305 bit = 1<<index;
306
307 raw_spin_lock_irqsave(&asic->lock, flags);
308 level = asic3_read_register(asic,
309 bank + ASIC3_GPIO_LEVEL_TRIGGER);
310 edge = asic3_read_register(asic,
311 bank + ASIC3_GPIO_EDGE_TRIGGER);
312 trigger = asic3_read_register(asic,
313 bank + ASIC3_GPIO_TRIGGER_TYPE);
314 asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] &= ~bit;
315
316 if (type == IRQ_TYPE_EDGE_RISING) {
317 trigger |= bit;
318 edge |= bit;
319 } else if (type == IRQ_TYPE_EDGE_FALLING) {
320 trigger |= bit;
321 edge &= ~bit;
322 } else if (type == IRQ_TYPE_EDGE_BOTH) {
323 trigger |= bit;
324 if (asic3_gpio_get(&asic->gpio, data->irq - asic->irq_base))
325 edge &= ~bit;
326 else
327 edge |= bit;
328 asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] |= bit;
329 } else if (type == IRQ_TYPE_LEVEL_LOW) {
330 trigger &= ~bit;
331 level &= ~bit;
332 } else if (type == IRQ_TYPE_LEVEL_HIGH) {
333 trigger &= ~bit;
334 level |= bit;
335 } else {
336 /*
337 * if type == IRQ_TYPE_NONE, we should mask interrupts, but
338 * be careful to not unmask them if mask was also called.
339 * Probably need internal state for mask.
340 */
341 dev_notice(asic->dev, "irq type not changed\n");
342 }
343 asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER,
344 level);
345 asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER,
346 edge);
347 asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE,
348 trigger);
349 raw_spin_unlock_irqrestore(&asic->lock, flags);
350 return 0;
351}
352
353static int asic3_gpio_irq_set_wake(struct irq_data *data, unsigned int on)
354{
355 struct asic3 *asic = irq_data_get_irq_chip_data(data);
356 u32 bank, index;
357 u16 bit;
358
359 bank = asic3_irq_to_bank(asic, data->irq);
360 index = asic3_irq_to_index(asic, data->irq);
361 bit = 1<<index;
362
363 asic3_set_register(asic, bank + ASIC3_GPIO_SLEEP_MASK, bit, !on);
364
365 return 0;
366}
367
368static struct irq_chip asic3_gpio_irq_chip = {
369 .name = "ASIC3-GPIO",
370 .irq_ack = asic3_mask_gpio_irq,
371 .irq_mask = asic3_mask_gpio_irq,
372 .irq_unmask = asic3_unmask_gpio_irq,
373 .irq_set_type = asic3_gpio_irq_type,
374 .irq_set_wake = asic3_gpio_irq_set_wake,
375};
376
377static struct irq_chip asic3_irq_chip = {
378 .name = "ASIC3",
379 .irq_ack = asic3_mask_irq,
380 .irq_mask = asic3_mask_irq,
381 .irq_unmask = asic3_unmask_irq,
382};
383
384static int __init asic3_irq_probe(struct platform_device *pdev)
385{
386 struct asic3 *asic = platform_get_drvdata(pdev);
387 unsigned long clksel = 0;
388 unsigned int irq, irq_base;
389 int ret;
390
391 ret = platform_get_irq(pdev, 0);
392 if (ret < 0)
393 return ret;
394 asic->irq_nr = ret;
395
396 /* turn on clock to IRQ controller */
397 clksel |= CLOCK_SEL_CX;
398 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
399 clksel);
400
401 irq_base = asic->irq_base;
402
403 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
404 if (irq < asic->irq_base + ASIC3_NUM_GPIOS)
405 irq_set_chip(irq, &asic3_gpio_irq_chip);
406 else
407 irq_set_chip(irq, &asic3_irq_chip);
408
409 irq_set_chip_data(irq, asic);
410 irq_set_handler(irq, handle_level_irq);
411 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
412 }
413
414 asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
415 ASIC3_INTMASK_GINTMASK);
416
417 irq_set_chained_handler_and_data(asic->irq_nr, asic3_irq_demux, asic);
418 irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING);
419
420 return 0;
421}
422
423static void asic3_irq_remove(struct platform_device *pdev)
424{
425 struct asic3 *asic = platform_get_drvdata(pdev);
426 unsigned int irq, irq_base;
427
428 irq_base = asic->irq_base;
429
430 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
431 irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
432 irq_set_chip_and_handler(irq, NULL, NULL);
433 irq_set_chip_data(irq, NULL);
434 }
435 irq_set_chained_handler(asic->irq_nr, NULL);
436}
437
438/* GPIOs */
439static int asic3_gpio_direction(struct gpio_chip *chip,
440 unsigned offset, int out)
441{
442 u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg;
443 unsigned int gpio_base;
444 unsigned long flags;
445 struct asic3 *asic;
446
447 asic = gpiochip_get_data(chip);
448 gpio_base = ASIC3_GPIO_TO_BASE(offset);
449
450 if (gpio_base > ASIC3_GPIO_D_BASE) {
451 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
452 gpio_base, offset);
453 return -EINVAL;
454 }
455
456 raw_spin_lock_irqsave(&asic->lock, flags);
457
458 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION);
459
460 /* Input is 0, Output is 1 */
461 if (out)
462 out_reg |= mask;
463 else
464 out_reg &= ~mask;
465
466 asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg);
467
468 raw_spin_unlock_irqrestore(&asic->lock, flags);
469
470 return 0;
471
472}
473
474static int asic3_gpio_direction_input(struct gpio_chip *chip,
475 unsigned offset)
476{
477 return asic3_gpio_direction(chip, offset, 0);
478}
479
480static int asic3_gpio_direction_output(struct gpio_chip *chip,
481 unsigned offset, int value)
482{
483 return asic3_gpio_direction(chip, offset, 1);
484}
485
486static int asic3_gpio_get(struct gpio_chip *chip,
487 unsigned offset)
488{
489 unsigned int gpio_base;
490 u32 mask = ASIC3_GPIO_TO_MASK(offset);
491 struct asic3 *asic;
492
493 asic = gpiochip_get_data(chip);
494 gpio_base = ASIC3_GPIO_TO_BASE(offset);
495
496 if (gpio_base > ASIC3_GPIO_D_BASE) {
497 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
498 gpio_base, offset);
499 return -EINVAL;
500 }
501
502 return !!(asic3_read_register(asic,
503 gpio_base + ASIC3_GPIO_STATUS) & mask);
504}
505
506static void asic3_gpio_set(struct gpio_chip *chip,
507 unsigned offset, int value)
508{
509 u32 mask, out_reg;
510 unsigned int gpio_base;
511 unsigned long flags;
512 struct asic3 *asic;
513
514 asic = gpiochip_get_data(chip);
515 gpio_base = ASIC3_GPIO_TO_BASE(offset);
516
517 if (gpio_base > ASIC3_GPIO_D_BASE) {
518 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
519 gpio_base, offset);
520 return;
521 }
522
523 mask = ASIC3_GPIO_TO_MASK(offset);
524
525 raw_spin_lock_irqsave(&asic->lock, flags);
526
527 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT);
528
529 if (value)
530 out_reg |= mask;
531 else
532 out_reg &= ~mask;
533
534 asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg);
535
536 raw_spin_unlock_irqrestore(&asic->lock, flags);
537}
538
539static int asic3_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
540{
541 struct asic3 *asic = gpiochip_get_data(chip);
542
543 return asic->irq_base + offset;
544}
545
546static __init int asic3_gpio_probe(struct platform_device *pdev,
547 u16 *gpio_config, int num)
548{
549 struct asic3 *asic = platform_get_drvdata(pdev);
550 u16 alt_reg[ASIC3_NUM_GPIO_BANKS];
551 u16 out_reg[ASIC3_NUM_GPIO_BANKS];
552 u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
553 int i;
554
555 memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
556 memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
557 memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
558
559 /* Enable all GPIOs */
560 asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);
561 asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff);
562 asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff);
563 asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff);
564
565 for (i = 0; i < num; i++) {
566 u8 alt, pin, dir, init, bank_num, bit_num;
567 u16 config = gpio_config[i];
568
569 pin = ASIC3_CONFIG_GPIO_PIN(config);
570 alt = ASIC3_CONFIG_GPIO_ALT(config);
571 dir = ASIC3_CONFIG_GPIO_DIR(config);
572 init = ASIC3_CONFIG_GPIO_INIT(config);
573
574 bank_num = ASIC3_GPIO_TO_BANK(pin);
575 bit_num = ASIC3_GPIO_TO_BIT(pin);
576
577 alt_reg[bank_num] |= (alt << bit_num);
578 out_reg[bank_num] |= (init << bit_num);
579 dir_reg[bank_num] |= (dir << bit_num);
580 }
581
582 for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) {
583 asic3_write_register(asic,
584 ASIC3_BANK_TO_BASE(i) +
585 ASIC3_GPIO_DIRECTION,
586 dir_reg[i]);
587 asic3_write_register(asic,
588 ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT,
589 out_reg[i]);
590 asic3_write_register(asic,
591 ASIC3_BANK_TO_BASE(i) +
592 ASIC3_GPIO_ALT_FUNCTION,
593 alt_reg[i]);
594 }
595
596 return gpiochip_add_data(&asic->gpio, asic);
597}
598
599static void asic3_gpio_remove(struct platform_device *pdev)
600{
601 struct asic3 *asic = platform_get_drvdata(pdev);
602
603 gpiochip_remove(&asic->gpio);
604}
605
606static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk)
607{
608 unsigned long flags;
609 u32 cdex;
610
611 raw_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 raw_spin_unlock_irqrestore(&asic->lock, flags);
618}
619
620static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
621{
622 unsigned long flags;
623 u32 cdex;
624
625 WARN_ON(clk->enabled == 0);
626
627 raw_spin_lock_irqsave(&asic->lock, flags);
628 if (--clk->enabled == 0) {
629 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
630 cdex &= ~clk->cdex;
631 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
632 }
633 raw_spin_unlock_irqrestore(&asic->lock, flags);
634}
635
636/* MFD cells (SPI, PWM, LED, DS1WM, MMC) */
637static struct ds1wm_driver_data ds1wm_pdata = {
638 .active_high = 1,
639 .reset_recover_delay = 1,
640};
641
642static struct resource ds1wm_resources[] = {
643 {
644 .start = ASIC3_OWM_BASE,
645 .end = ASIC3_OWM_BASE + 0x13,
646 .flags = IORESOURCE_MEM,
647 },
648 {
649 .start = ASIC3_IRQ_OWM,
650 .end = ASIC3_IRQ_OWM,
651 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
652 },
653};
654
655static int ds1wm_enable(struct platform_device *pdev)
656{
657 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
658
659 /* Turn on external clocks and the OWM clock */
660 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
661 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
662 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
663 usleep_range(1000, 5000);
664
665 /* Reset and enable DS1WM */
666 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
667 ASIC3_EXTCF_OWM_RESET, 1);
668 usleep_range(1000, 5000);
669 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
670 ASIC3_EXTCF_OWM_RESET, 0);
671 usleep_range(1000, 5000);
672 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
673 ASIC3_EXTCF_OWM_EN, 1);
674 usleep_range(1000, 5000);
675
676 return 0;
677}
678
679static int ds1wm_disable(struct platform_device *pdev)
680{
681 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
682
683 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
684 ASIC3_EXTCF_OWM_EN, 0);
685
686 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
687 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
688 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
689
690 return 0;
691}
692
693static const struct mfd_cell asic3_cell_ds1wm = {
694 .name = "ds1wm",
695 .enable = ds1wm_enable,
696 .disable = ds1wm_disable,
697 .platform_data = &ds1wm_pdata,
698 .pdata_size = sizeof(ds1wm_pdata),
699 .num_resources = ARRAY_SIZE(ds1wm_resources),
700 .resources = ds1wm_resources,
701};
702
703static void asic3_mmc_pwr(struct platform_device *pdev, int state)
704{
705 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
706
707 tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state);
708}
709
710static void asic3_mmc_clk_div(struct platform_device *pdev, int state)
711{
712 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
713
714 tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state);
715}
716
717static struct tmio_mmc_data asic3_mmc_data = {
718 .hclk = 24576000,
719 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
720 .set_pwr = asic3_mmc_pwr,
721 .set_clk_div = asic3_mmc_clk_div,
722};
723
724static struct resource asic3_mmc_resources[] = {
725 DEFINE_RES_MEM(ASIC3_SD_CTRL_BASE, 0x400),
726 DEFINE_RES_IRQ(0)
727};
728
729static int asic3_mmc_enable(struct platform_device *pdev)
730{
731 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
732
733 /* Not sure if it must be done bit by bit, but leaving as-is */
734 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
735 ASIC3_SDHWCTRL_LEVCD, 1);
736 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
737 ASIC3_SDHWCTRL_LEVWP, 1);
738 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
739 ASIC3_SDHWCTRL_SUSPEND, 0);
740 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
741 ASIC3_SDHWCTRL_PCLR, 0);
742
743 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
744 /* CLK32 used for card detection and for interruption detection
745 * when HCLK is stopped.
746 */
747 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
748 usleep_range(1000, 5000);
749
750 /* HCLK 24.576 MHz, BCLK 12.288 MHz: */
751 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
752 CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL);
753
754 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
755 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
756 usleep_range(1000, 5000);
757
758 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
759 ASIC3_EXTCF_SD_MEM_ENABLE, 1);
760
761 /* Enable SD card slot 3.3V power supply */
762 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
763 ASIC3_SDHWCTRL_SDPWR, 1);
764
765 /* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */
766 tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift,
767 ASIC3_SD_CTRL_BASE >> 1);
768
769 return 0;
770}
771
772static int asic3_mmc_disable(struct platform_device *pdev)
773{
774 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
775
776 /* Put in suspend mode */
777 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
778 ASIC3_SDHWCTRL_SUSPEND, 1);
779
780 /* Disable clocks */
781 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
782 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
783 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
784 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
785 return 0;
786}
787
788static const struct mfd_cell asic3_cell_mmc = {
789 .name = "tmio-mmc",
790 .enable = asic3_mmc_enable,
791 .disable = asic3_mmc_disable,
792 .suspend = asic3_mmc_disable,
793 .resume = asic3_mmc_enable,
794 .platform_data = &asic3_mmc_data,
795 .pdata_size = sizeof(asic3_mmc_data),
796 .num_resources = ARRAY_SIZE(asic3_mmc_resources),
797 .resources = asic3_mmc_resources,
798};
799
800static const int clock_ledn[ASIC3_NUM_LEDS] = {
801 [0] = ASIC3_CLOCK_LED0,
802 [1] = ASIC3_CLOCK_LED1,
803 [2] = ASIC3_CLOCK_LED2,
804};
805
806static int asic3_leds_enable(struct platform_device *pdev)
807{
808 const struct mfd_cell *cell = mfd_get_cell(pdev);
809 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
810
811 asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]);
812
813 return 0;
814}
815
816static int asic3_leds_disable(struct platform_device *pdev)
817{
818 const struct mfd_cell *cell = mfd_get_cell(pdev);
819 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
820
821 asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
822
823 return 0;
824}
825
826static int asic3_leds_suspend(struct platform_device *pdev)
827{
828 const struct mfd_cell *cell = mfd_get_cell(pdev);
829 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
830
831 while (asic3_gpio_get(&asic->gpio, ASIC3_GPIO(C, cell->id)) != 0)
832 usleep_range(1000, 5000);
833
834 asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
835
836 return 0;
837}
838
839static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
840 [0] = {
841 .name = "leds-asic3",
842 .id = 0,
843 .enable = asic3_leds_enable,
844 .disable = asic3_leds_disable,
845 .suspend = asic3_leds_suspend,
846 .resume = asic3_leds_enable,
847 },
848 [1] = {
849 .name = "leds-asic3",
850 .id = 1,
851 .enable = asic3_leds_enable,
852 .disable = asic3_leds_disable,
853 .suspend = asic3_leds_suspend,
854 .resume = asic3_leds_enable,
855 },
856 [2] = {
857 .name = "leds-asic3",
858 .id = 2,
859 .enable = asic3_leds_enable,
860 .disable = asic3_leds_disable,
861 .suspend = asic3_leds_suspend,
862 .resume = asic3_leds_enable,
863 },
864};
865
866static int __init asic3_mfd_probe(struct platform_device *pdev,
867 struct asic3_platform_data *pdata,
868 struct resource *mem)
869{
870 struct asic3 *asic = platform_get_drvdata(pdev);
871 struct resource *mem_sdio;
872 int irq, ret;
873
874 mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1);
875 if (!mem_sdio)
876 dev_dbg(asic->dev, "no SDIO MEM resource\n");
877
878 irq = platform_get_irq(pdev, 1);
879 if (irq < 0)
880 dev_dbg(asic->dev, "no SDIO IRQ resource\n");
881
882 /* DS1WM */
883 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
884 ASIC3_EXTCF_OWM_SMB, 0);
885
886 ds1wm_resources[0].start >>= asic->bus_shift;
887 ds1wm_resources[0].end >>= asic->bus_shift;
888
889 /* MMC */
890 if (mem_sdio) {
891 asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >>
892 asic->bus_shift) + mem_sdio->start,
893 ASIC3_SD_CONFIG_SIZE >> asic->bus_shift);
894 if (!asic->tmio_cnf) {
895 ret = -ENOMEM;
896 dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n");
897 goto out;
898 }
899 }
900 asic3_mmc_resources[0].start >>= asic->bus_shift;
901 asic3_mmc_resources[0].end >>= asic->bus_shift;
902
903 if (pdata->clock_rate) {
904 ds1wm_pdata.clock_rate = pdata->clock_rate;
905 ret = mfd_add_devices(&pdev->dev, pdev->id,
906 &asic3_cell_ds1wm, 1, mem, asic->irq_base, NULL);
907 if (ret < 0)
908 goto out_unmap;
909 }
910
911 if (mem_sdio && (irq >= 0)) {
912 ret = mfd_add_devices(&pdev->dev, pdev->id,
913 &asic3_cell_mmc, 1, mem_sdio, irq, NULL);
914 if (ret < 0)
915 goto out_unmap;
916 }
917
918 ret = 0;
919 if (pdata->leds) {
920 int i;
921
922 for (i = 0; i < ASIC3_NUM_LEDS; ++i) {
923 asic3_cell_leds[i].platform_data = &pdata->leds[i];
924 asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]);
925 }
926 ret = mfd_add_devices(&pdev->dev, 0,
927 asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0, NULL);
928 }
929 return ret;
930
931out_unmap:
932 if (asic->tmio_cnf)
933 iounmap(asic->tmio_cnf);
934out:
935 return ret;
936}
937
938static void asic3_mfd_remove(struct platform_device *pdev)
939{
940 struct asic3 *asic = platform_get_drvdata(pdev);
941
942 mfd_remove_devices(&pdev->dev);
943 iounmap(asic->tmio_cnf);
944}
945
946/* Core */
947static int __init asic3_probe(struct platform_device *pdev)
948{
949 struct asic3_platform_data *pdata = dev_get_platdata(&pdev->dev);
950 struct asic3 *asic;
951 struct resource *mem;
952 unsigned long clksel;
953 int ret = 0;
954
955 asic = devm_kzalloc(&pdev->dev,
956 sizeof(struct asic3), GFP_KERNEL);
957 if (!asic)
958 return -ENOMEM;
959
960 raw_spin_lock_init(&asic->lock);
961 platform_set_drvdata(pdev, asic);
962 asic->dev = &pdev->dev;
963
964 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
965 if (!mem) {
966 dev_err(asic->dev, "no MEM resource\n");
967 return -ENOMEM;
968 }
969
970 asic->mapping = ioremap(mem->start, resource_size(mem));
971 if (!asic->mapping) {
972 dev_err(asic->dev, "Couldn't ioremap\n");
973 return -ENOMEM;
974 }
975
976 asic->irq_base = pdata->irq_base;
977
978 /* calculate bus shift from mem resource */
979 asic->bus_shift = 2 - (resource_size(mem) >> 12);
980
981 clksel = 0;
982 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);
983
984 ret = asic3_irq_probe(pdev);
985 if (ret < 0) {
986 dev_err(asic->dev, "Couldn't probe IRQs\n");
987 goto out_unmap;
988 }
989
990 asic->gpio.label = "asic3";
991 asic->gpio.base = pdata->gpio_base;
992 asic->gpio.ngpio = ASIC3_NUM_GPIOS;
993 asic->gpio.get = asic3_gpio_get;
994 asic->gpio.set = asic3_gpio_set;
995 asic->gpio.direction_input = asic3_gpio_direction_input;
996 asic->gpio.direction_output = asic3_gpio_direction_output;
997 asic->gpio.to_irq = asic3_gpio_to_irq;
998
999 ret = asic3_gpio_probe(pdev,
1000 pdata->gpio_config,
1001 pdata->gpio_config_num);
1002 if (ret < 0) {
1003 dev_err(asic->dev, "GPIO probe failed\n");
1004 goto out_irq;
1005 }
1006
1007 /* Making a per-device copy is only needed for the
1008 * theoretical case of multiple ASIC3s on one board:
1009 */
1010 memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
1011
1012 asic3_mfd_probe(pdev, pdata, mem);
1013
1014 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
1015 (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 1);
1016
1017 dev_info(asic->dev, "ASIC3 Core driver\n");
1018
1019 return 0;
1020
1021 out_irq:
1022 asic3_irq_remove(pdev);
1023
1024 out_unmap:
1025 iounmap(asic->mapping);
1026
1027 return ret;
1028}
1029
1030static int asic3_remove(struct platform_device *pdev)
1031{
1032 struct asic3 *asic = platform_get_drvdata(pdev);
1033
1034 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
1035 (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 0);
1036
1037 asic3_mfd_remove(pdev);
1038
1039 asic3_gpio_remove(pdev);
1040
1041 asic3_irq_remove(pdev);
1042
1043 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0);
1044
1045 iounmap(asic->mapping);
1046
1047 return 0;
1048}
1049
1050static void asic3_shutdown(struct platform_device *pdev)
1051{
1052}
1053
1054static struct platform_driver asic3_device_driver = {
1055 .driver = {
1056 .name = "asic3",
1057 },
1058 .remove = asic3_remove,
1059 .shutdown = asic3_shutdown,
1060};
1061
1062static int __init asic3_init(void)
1063{
1064 int retval = 0;
1065
1066 retval = platform_driver_probe(&asic3_device_driver, asic3_probe);
1067
1068 return retval;
1069}
1070
1071subsys_initcall(asic3_init);
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
34enum {
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
49struct 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
61static 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
76struct 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
90static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
91
92void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)
93{
94 iowrite16(value, asic->mapping +
95 (reg >> asic->bus_shift));
96}
97EXPORT_SYMBOL_GPL(asic3_write_register);
98
99u32 asic3_read_register(struct asic3 *asic, unsigned int reg)
100{
101 return ioread16(asic->mapping +
102 (reg >> asic->bus_shift));
103}
104EXPORT_SYMBOL_GPL(asic3_read_register);
105
106static 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
126static 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
141static 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
211static 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
220static inline int asic3_irq_to_index(struct asic3 *asic, int irq)
221{
222 return (irq - asic->irq_base) & 0xf;
223}
224
225static 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
241static 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
262static 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
278static 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
299static 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
356static int asic3_gpio_irq_set_wake(struct irq_data *data, unsigned int on)
357{
358 struct asic3 *asic = irq_data_get_irq_chip_data(data);
359 u32 bank, index;
360 u16 bit;
361
362 bank = asic3_irq_to_bank(asic, data->irq);
363 index = asic3_irq_to_index(asic, data->irq);
364 bit = 1<<index;
365
366 asic3_set_register(asic, bank + ASIC3_GPIO_SLEEP_MASK, bit, !on);
367
368 return 0;
369}
370
371static struct irq_chip asic3_gpio_irq_chip = {
372 .name = "ASIC3-GPIO",
373 .irq_ack = asic3_mask_gpio_irq,
374 .irq_mask = asic3_mask_gpio_irq,
375 .irq_unmask = asic3_unmask_gpio_irq,
376 .irq_set_type = asic3_gpio_irq_type,
377 .irq_set_wake = asic3_gpio_irq_set_wake,
378};
379
380static struct irq_chip asic3_irq_chip = {
381 .name = "ASIC3",
382 .irq_ack = asic3_mask_irq,
383 .irq_mask = asic3_mask_irq,
384 .irq_unmask = asic3_unmask_irq,
385};
386
387static int __init asic3_irq_probe(struct platform_device *pdev)
388{
389 struct asic3 *asic = platform_get_drvdata(pdev);
390 unsigned long clksel = 0;
391 unsigned int irq, irq_base;
392 int ret;
393
394 ret = platform_get_irq(pdev, 0);
395 if (ret < 0)
396 return ret;
397 asic->irq_nr = ret;
398
399 /* turn on clock to IRQ controller */
400 clksel |= CLOCK_SEL_CX;
401 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
402 clksel);
403
404 irq_base = asic->irq_base;
405
406 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
407 if (irq < asic->irq_base + ASIC3_NUM_GPIOS)
408 irq_set_chip(irq, &asic3_gpio_irq_chip);
409 else
410 irq_set_chip(irq, &asic3_irq_chip);
411
412 irq_set_chip_data(irq, asic);
413 irq_set_handler(irq, handle_level_irq);
414 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
415 }
416
417 asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
418 ASIC3_INTMASK_GINTMASK);
419
420 irq_set_chained_handler(asic->irq_nr, asic3_irq_demux);
421 irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING);
422 irq_set_handler_data(asic->irq_nr, asic);
423
424 return 0;
425}
426
427static void asic3_irq_remove(struct platform_device *pdev)
428{
429 struct asic3 *asic = platform_get_drvdata(pdev);
430 unsigned int irq, irq_base;
431
432 irq_base = asic->irq_base;
433
434 for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
435 set_irq_flags(irq, 0);
436 irq_set_chip_and_handler(irq, NULL, NULL);
437 irq_set_chip_data(irq, NULL);
438 }
439 irq_set_chained_handler(asic->irq_nr, NULL);
440}
441
442/* GPIOs */
443static int asic3_gpio_direction(struct gpio_chip *chip,
444 unsigned offset, int out)
445{
446 u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg;
447 unsigned int gpio_base;
448 unsigned long flags;
449 struct asic3 *asic;
450
451 asic = container_of(chip, struct asic3, gpio);
452 gpio_base = ASIC3_GPIO_TO_BASE(offset);
453
454 if (gpio_base > ASIC3_GPIO_D_BASE) {
455 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
456 gpio_base, offset);
457 return -EINVAL;
458 }
459
460 spin_lock_irqsave(&asic->lock, flags);
461
462 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION);
463
464 /* Input is 0, Output is 1 */
465 if (out)
466 out_reg |= mask;
467 else
468 out_reg &= ~mask;
469
470 asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg);
471
472 spin_unlock_irqrestore(&asic->lock, flags);
473
474 return 0;
475
476}
477
478static int asic3_gpio_direction_input(struct gpio_chip *chip,
479 unsigned offset)
480{
481 return asic3_gpio_direction(chip, offset, 0);
482}
483
484static int asic3_gpio_direction_output(struct gpio_chip *chip,
485 unsigned offset, int value)
486{
487 return asic3_gpio_direction(chip, offset, 1);
488}
489
490static int asic3_gpio_get(struct gpio_chip *chip,
491 unsigned offset)
492{
493 unsigned int gpio_base;
494 u32 mask = ASIC3_GPIO_TO_MASK(offset);
495 struct asic3 *asic;
496
497 asic = container_of(chip, struct asic3, gpio);
498 gpio_base = ASIC3_GPIO_TO_BASE(offset);
499
500 if (gpio_base > ASIC3_GPIO_D_BASE) {
501 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
502 gpio_base, offset);
503 return -EINVAL;
504 }
505
506 return asic3_read_register(asic, gpio_base + ASIC3_GPIO_STATUS) & mask;
507}
508
509static void asic3_gpio_set(struct gpio_chip *chip,
510 unsigned offset, int value)
511{
512 u32 mask, out_reg;
513 unsigned int gpio_base;
514 unsigned long flags;
515 struct asic3 *asic;
516
517 asic = container_of(chip, struct asic3, gpio);
518 gpio_base = ASIC3_GPIO_TO_BASE(offset);
519
520 if (gpio_base > ASIC3_GPIO_D_BASE) {
521 dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
522 gpio_base, offset);
523 return;
524 }
525
526 mask = ASIC3_GPIO_TO_MASK(offset);
527
528 spin_lock_irqsave(&asic->lock, flags);
529
530 out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT);
531
532 if (value)
533 out_reg |= mask;
534 else
535 out_reg &= ~mask;
536
537 asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg);
538
539 spin_unlock_irqrestore(&asic->lock, flags);
540
541 return;
542}
543
544static int asic3_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
545{
546 struct asic3 *asic = container_of(chip, struct asic3, gpio);
547
548 return asic->irq_base + offset;
549}
550
551static __init int asic3_gpio_probe(struct platform_device *pdev,
552 u16 *gpio_config, int num)
553{
554 struct asic3 *asic = platform_get_drvdata(pdev);
555 u16 alt_reg[ASIC3_NUM_GPIO_BANKS];
556 u16 out_reg[ASIC3_NUM_GPIO_BANKS];
557 u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
558 int i;
559
560 memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
561 memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
562 memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
563
564 /* Enable all GPIOs */
565 asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);
566 asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff);
567 asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff);
568 asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff);
569
570 for (i = 0; i < num; i++) {
571 u8 alt, pin, dir, init, bank_num, bit_num;
572 u16 config = gpio_config[i];
573
574 pin = ASIC3_CONFIG_GPIO_PIN(config);
575 alt = ASIC3_CONFIG_GPIO_ALT(config);
576 dir = ASIC3_CONFIG_GPIO_DIR(config);
577 init = ASIC3_CONFIG_GPIO_INIT(config);
578
579 bank_num = ASIC3_GPIO_TO_BANK(pin);
580 bit_num = ASIC3_GPIO_TO_BIT(pin);
581
582 alt_reg[bank_num] |= (alt << bit_num);
583 out_reg[bank_num] |= (init << bit_num);
584 dir_reg[bank_num] |= (dir << bit_num);
585 }
586
587 for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) {
588 asic3_write_register(asic,
589 ASIC3_BANK_TO_BASE(i) +
590 ASIC3_GPIO_DIRECTION,
591 dir_reg[i]);
592 asic3_write_register(asic,
593 ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT,
594 out_reg[i]);
595 asic3_write_register(asic,
596 ASIC3_BANK_TO_BASE(i) +
597 ASIC3_GPIO_ALT_FUNCTION,
598 alt_reg[i]);
599 }
600
601 return gpiochip_add(&asic->gpio);
602}
603
604static int asic3_gpio_remove(struct platform_device *pdev)
605{
606 struct asic3 *asic = platform_get_drvdata(pdev);
607
608 return gpiochip_remove(&asic->gpio);
609}
610
611static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk)
612{
613 unsigned long flags;
614 u32 cdex;
615
616 spin_lock_irqsave(&asic->lock, flags);
617 if (clk->enabled++ == 0) {
618 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
619 cdex |= clk->cdex;
620 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
621 }
622 spin_unlock_irqrestore(&asic->lock, flags);
623}
624
625static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
626{
627 unsigned long flags;
628 u32 cdex;
629
630 WARN_ON(clk->enabled == 0);
631
632 spin_lock_irqsave(&asic->lock, flags);
633 if (--clk->enabled == 0) {
634 cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
635 cdex &= ~clk->cdex;
636 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
637 }
638 spin_unlock_irqrestore(&asic->lock, flags);
639}
640
641/* MFD cells (SPI, PWM, LED, DS1WM, MMC) */
642static struct ds1wm_driver_data ds1wm_pdata = {
643 .active_high = 1,
644 .reset_recover_delay = 1,
645};
646
647static struct resource ds1wm_resources[] = {
648 {
649 .start = ASIC3_OWM_BASE,
650 .end = ASIC3_OWM_BASE + 0x13,
651 .flags = IORESOURCE_MEM,
652 },
653 {
654 .start = ASIC3_IRQ_OWM,
655 .end = ASIC3_IRQ_OWM,
656 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
657 },
658};
659
660static int ds1wm_enable(struct platform_device *pdev)
661{
662 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
663
664 /* Turn on external clocks and the OWM clock */
665 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
666 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
667 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
668 msleep(1);
669
670 /* Reset and enable DS1WM */
671 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
672 ASIC3_EXTCF_OWM_RESET, 1);
673 msleep(1);
674 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
675 ASIC3_EXTCF_OWM_RESET, 0);
676 msleep(1);
677 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
678 ASIC3_EXTCF_OWM_EN, 1);
679 msleep(1);
680
681 return 0;
682}
683
684static int ds1wm_disable(struct platform_device *pdev)
685{
686 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
687
688 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
689 ASIC3_EXTCF_OWM_EN, 0);
690
691 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
692 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
693 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
694
695 return 0;
696}
697
698static const struct mfd_cell asic3_cell_ds1wm = {
699 .name = "ds1wm",
700 .enable = ds1wm_enable,
701 .disable = ds1wm_disable,
702 .platform_data = &ds1wm_pdata,
703 .pdata_size = sizeof(ds1wm_pdata),
704 .num_resources = ARRAY_SIZE(ds1wm_resources),
705 .resources = ds1wm_resources,
706};
707
708static void asic3_mmc_pwr(struct platform_device *pdev, int state)
709{
710 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
711
712 tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state);
713}
714
715static void asic3_mmc_clk_div(struct platform_device *pdev, int state)
716{
717 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
718
719 tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state);
720}
721
722static struct tmio_mmc_data asic3_mmc_data = {
723 .hclk = 24576000,
724 .set_pwr = asic3_mmc_pwr,
725 .set_clk_div = asic3_mmc_clk_div,
726};
727
728static struct resource asic3_mmc_resources[] = {
729 {
730 .start = ASIC3_SD_CTRL_BASE,
731 .end = ASIC3_SD_CTRL_BASE + 0x3ff,
732 .flags = IORESOURCE_MEM,
733 },
734 {
735 .start = 0,
736 .end = 0,
737 .flags = IORESOURCE_IRQ,
738 },
739};
740
741static int asic3_mmc_enable(struct platform_device *pdev)
742{
743 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
744
745 /* Not sure if it must be done bit by bit, but leaving as-is */
746 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
747 ASIC3_SDHWCTRL_LEVCD, 1);
748 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
749 ASIC3_SDHWCTRL_LEVWP, 1);
750 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
751 ASIC3_SDHWCTRL_SUSPEND, 0);
752 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
753 ASIC3_SDHWCTRL_PCLR, 0);
754
755 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
756 /* CLK32 used for card detection and for interruption detection
757 * when HCLK is stopped.
758 */
759 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
760 msleep(1);
761
762 /* HCLK 24.576 MHz, BCLK 12.288 MHz: */
763 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
764 CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL);
765
766 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
767 asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
768 msleep(1);
769
770 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
771 ASIC3_EXTCF_SD_MEM_ENABLE, 1);
772
773 /* Enable SD card slot 3.3V power supply */
774 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
775 ASIC3_SDHWCTRL_SDPWR, 1);
776
777 /* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */
778 tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift,
779 ASIC3_SD_CTRL_BASE >> 1);
780
781 return 0;
782}
783
784static int asic3_mmc_disable(struct platform_device *pdev)
785{
786 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
787
788 /* Put in suspend mode */
789 asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
790 ASIC3_SDHWCTRL_SUSPEND, 1);
791
792 /* Disable clocks */
793 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
794 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
795 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
796 asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
797 return 0;
798}
799
800static const struct mfd_cell asic3_cell_mmc = {
801 .name = "tmio-mmc",
802 .enable = asic3_mmc_enable,
803 .disable = asic3_mmc_disable,
804 .suspend = asic3_mmc_disable,
805 .resume = asic3_mmc_enable,
806 .platform_data = &asic3_mmc_data,
807 .pdata_size = sizeof(asic3_mmc_data),
808 .num_resources = ARRAY_SIZE(asic3_mmc_resources),
809 .resources = asic3_mmc_resources,
810};
811
812static const int clock_ledn[ASIC3_NUM_LEDS] = {
813 [0] = ASIC3_CLOCK_LED0,
814 [1] = ASIC3_CLOCK_LED1,
815 [2] = ASIC3_CLOCK_LED2,
816};
817
818static int asic3_leds_enable(struct platform_device *pdev)
819{
820 const struct mfd_cell *cell = mfd_get_cell(pdev);
821 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
822
823 asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]);
824
825 return 0;
826}
827
828static int asic3_leds_disable(struct platform_device *pdev)
829{
830 const struct mfd_cell *cell = mfd_get_cell(pdev);
831 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
832
833 asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
834
835 return 0;
836}
837
838static int asic3_leds_suspend(struct platform_device *pdev)
839{
840 const struct mfd_cell *cell = mfd_get_cell(pdev);
841 struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
842
843 while (asic3_gpio_get(&asic->gpio, ASIC3_GPIO(C, cell->id)) != 0)
844 msleep(1);
845
846 asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
847
848 return 0;
849}
850
851static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
852 [0] = {
853 .name = "leds-asic3",
854 .id = 0,
855 .enable = asic3_leds_enable,
856 .disable = asic3_leds_disable,
857 .suspend = asic3_leds_suspend,
858 .resume = asic3_leds_enable,
859 },
860 [1] = {
861 .name = "leds-asic3",
862 .id = 1,
863 .enable = asic3_leds_enable,
864 .disable = asic3_leds_disable,
865 .suspend = asic3_leds_suspend,
866 .resume = asic3_leds_enable,
867 },
868 [2] = {
869 .name = "leds-asic3",
870 .id = 2,
871 .enable = asic3_leds_enable,
872 .disable = asic3_leds_disable,
873 .suspend = asic3_leds_suspend,
874 .resume = asic3_leds_enable,
875 },
876};
877
878static int __init asic3_mfd_probe(struct platform_device *pdev,
879 struct asic3_platform_data *pdata,
880 struct resource *mem)
881{
882 struct asic3 *asic = platform_get_drvdata(pdev);
883 struct resource *mem_sdio;
884 int irq, ret;
885
886 mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1);
887 if (!mem_sdio)
888 dev_dbg(asic->dev, "no SDIO MEM resource\n");
889
890 irq = platform_get_irq(pdev, 1);
891 if (irq < 0)
892 dev_dbg(asic->dev, "no SDIO IRQ resource\n");
893
894 /* DS1WM */
895 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
896 ASIC3_EXTCF_OWM_SMB, 0);
897
898 ds1wm_resources[0].start >>= asic->bus_shift;
899 ds1wm_resources[0].end >>= asic->bus_shift;
900
901 /* MMC */
902 asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) +
903 mem_sdio->start,
904 ASIC3_SD_CONFIG_SIZE >> asic->bus_shift);
905 if (!asic->tmio_cnf) {
906 ret = -ENOMEM;
907 dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n");
908 goto out;
909 }
910 asic3_mmc_resources[0].start >>= asic->bus_shift;
911 asic3_mmc_resources[0].end >>= asic->bus_shift;
912
913 if (pdata->clock_rate) {
914 ds1wm_pdata.clock_rate = pdata->clock_rate;
915 ret = mfd_add_devices(&pdev->dev, pdev->id,
916 &asic3_cell_ds1wm, 1, mem, asic->irq_base, NULL);
917 if (ret < 0)
918 goto out;
919 }
920
921 if (mem_sdio && (irq >= 0)) {
922 ret = mfd_add_devices(&pdev->dev, pdev->id,
923 &asic3_cell_mmc, 1, mem_sdio, irq, NULL);
924 if (ret < 0)
925 goto out;
926 }
927
928 ret = 0;
929 if (pdata->leds) {
930 int i;
931
932 for (i = 0; i < ASIC3_NUM_LEDS; ++i) {
933 asic3_cell_leds[i].platform_data = &pdata->leds[i];
934 asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]);
935 }
936 ret = mfd_add_devices(&pdev->dev, 0,
937 asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0, NULL);
938 }
939
940 out:
941 return ret;
942}
943
944static void asic3_mfd_remove(struct platform_device *pdev)
945{
946 struct asic3 *asic = platform_get_drvdata(pdev);
947
948 mfd_remove_devices(&pdev->dev);
949 iounmap(asic->tmio_cnf);
950}
951
952/* Core */
953static int __init asic3_probe(struct platform_device *pdev)
954{
955 struct asic3_platform_data *pdata = dev_get_platdata(&pdev->dev);
956 struct asic3 *asic;
957 struct resource *mem;
958 unsigned long clksel;
959 int ret = 0;
960
961 asic = devm_kzalloc(&pdev->dev,
962 sizeof(struct asic3), GFP_KERNEL);
963 if (asic == NULL) {
964 printk(KERN_ERR "kzalloc failed\n");
965 return -ENOMEM;
966 }
967
968 spin_lock_init(&asic->lock);
969 platform_set_drvdata(pdev, asic);
970 asic->dev = &pdev->dev;
971
972 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
973 if (!mem) {
974 dev_err(asic->dev, "no MEM resource\n");
975 return -ENOMEM;
976 }
977
978 asic->mapping = ioremap(mem->start, resource_size(mem));
979 if (!asic->mapping) {
980 dev_err(asic->dev, "Couldn't ioremap\n");
981 return -ENOMEM;
982 }
983
984 asic->irq_base = pdata->irq_base;
985
986 /* calculate bus shift from mem resource */
987 asic->bus_shift = 2 - (resource_size(mem) >> 12);
988
989 clksel = 0;
990 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);
991
992 ret = asic3_irq_probe(pdev);
993 if (ret < 0) {
994 dev_err(asic->dev, "Couldn't probe IRQs\n");
995 goto out_unmap;
996 }
997
998 asic->gpio.label = "asic3";
999 asic->gpio.base = pdata->gpio_base;
1000 asic->gpio.ngpio = ASIC3_NUM_GPIOS;
1001 asic->gpio.get = asic3_gpio_get;
1002 asic->gpio.set = asic3_gpio_set;
1003 asic->gpio.direction_input = asic3_gpio_direction_input;
1004 asic->gpio.direction_output = asic3_gpio_direction_output;
1005 asic->gpio.to_irq = asic3_gpio_to_irq;
1006
1007 ret = asic3_gpio_probe(pdev,
1008 pdata->gpio_config,
1009 pdata->gpio_config_num);
1010 if (ret < 0) {
1011 dev_err(asic->dev, "GPIO probe failed\n");
1012 goto out_irq;
1013 }
1014
1015 /* Making a per-device copy is only needed for the
1016 * theoretical case of multiple ASIC3s on one board:
1017 */
1018 memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
1019
1020 asic3_mfd_probe(pdev, pdata, mem);
1021
1022 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
1023 (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 1);
1024
1025 dev_info(asic->dev, "ASIC3 Core driver\n");
1026
1027 return 0;
1028
1029 out_irq:
1030 asic3_irq_remove(pdev);
1031
1032 out_unmap:
1033 iounmap(asic->mapping);
1034
1035 return ret;
1036}
1037
1038static int asic3_remove(struct platform_device *pdev)
1039{
1040 int ret;
1041 struct asic3 *asic = platform_get_drvdata(pdev);
1042
1043 asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
1044 (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 0);
1045
1046 asic3_mfd_remove(pdev);
1047
1048 ret = asic3_gpio_remove(pdev);
1049 if (ret < 0)
1050 return ret;
1051 asic3_irq_remove(pdev);
1052
1053 asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0);
1054
1055 iounmap(asic->mapping);
1056
1057 return 0;
1058}
1059
1060static void asic3_shutdown(struct platform_device *pdev)
1061{
1062}
1063
1064static struct platform_driver asic3_device_driver = {
1065 .driver = {
1066 .name = "asic3",
1067 },
1068 .remove = asic3_remove,
1069 .shutdown = asic3_shutdown,
1070};
1071
1072static int __init asic3_init(void)
1073{
1074 int retval = 0;
1075 retval = platform_driver_probe(&asic3_device_driver, asic3_probe);
1076 return retval;
1077}
1078
1079subsys_initcall(asic3_init);