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[ARM] 3739/1: genirq updates: irq_chip, add and use irq_chip.name
[mirror_ubuntu-bionic-kernel.git] / arch / arm / common / locomo.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/arch/arm/common/locomo.c
3 *
4 * Sharp LoCoMo 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 * This file contains all generic LoCoMo support.
11 *
12 * All initialization functions provided here are intended to be called
13 * from machine specific code with proper arguments when required.
14 *
15 * Based on sa1111.c
16 */
17
1da177e4
LT		 18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/delay.h>
22#include <linux/errno.h>
23#include <linux/ioport.h>
d052d1be 24#include <linux/platform_device.h>
1da177e4
LT		 25#include <linux/slab.h>
26#include <linux/spinlock.h>
27
28#include <asm/hardware.h>
1da177e4
LT		 29#include <asm/io.h>
30#include <asm/irq.h>
31#include <asm/mach/irq.h>
32
33#include <asm/hardware/locomo.h>
34
35/* M62332 output channel selection */
36#define M62332_EVR_CH 1 /* M62332 volume channel number */
37 /* 0 : CH.1 , 1 : CH. 2 */
38/* DAC send data */
39#define M62332_SLAVE_ADDR 0x4e /* Slave address */
40#define M62332_W_BIT 0x00 /* W bit (0 only) */
41#define M62332_SUB_ADDR 0x00 /* Sub address */
42#define M62332_A_BIT 0x00 /* A bit (0 only) */
43
44/* DAC setup and hold times (expressed in us) */
45#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
46#define DAC_START_SETUP_TIME 5 /* 4.7 us */
47#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
48#define DAC_START_HOLD_TIME 5 /* 4.7 us */
49#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
50#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
51#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
52#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
53#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
54#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
55
56/* the following is the overall data for the locomo chip */
57struct locomo {
58 struct device *dev;
59 unsigned long phys;
60 unsigned int irq;
61 spinlock_t lock;
54815366 62 void __iomem *base;
1da177e4
LT		 63};
64
65struct locomo_dev_info {
66 unsigned long offset;
67 unsigned long length;
68 unsigned int devid;
69 unsigned int irq[1];
70 const char * name;
71};
72
73/* All the locomo devices. If offset is non-zero, the mapbase for the
74 * locomo_dev will be set to the chip base plus offset. If offset is
75 * zero, then the mapbase for the locomo_dev will be set to zero. An
76 * offset of zero means the device only uses GPIOs or other helper
77 * functions inside this file */
78static struct locomo_dev_info locomo_devices[] = {
79 {
80 .devid = LOCOMO_DEVID_KEYBOARD,
81 .irq = {
82 IRQ_LOCOMO_KEY,
83 },
84 .name = "locomo-keyboard",
85 .offset = LOCOMO_KEYBOARD,
86 .length = 16,
87 },
88 {
89 .devid = LOCOMO_DEVID_FRONTLIGHT,
90 .irq = {},
91 .name = "locomo-frontlight",
92 .offset = LOCOMO_FRONTLIGHT,
93 .length = 8,
94
95 },
96 {
97 .devid = LOCOMO_DEVID_BACKLIGHT,
98 .irq = {},
99 .name = "locomo-backlight",
100 .offset = LOCOMO_BACKLIGHT,
101 .length = 8,
102 },
103 {
104 .devid = LOCOMO_DEVID_AUDIO,
105 .irq = {},
106 .name = "locomo-audio",
107 .offset = LOCOMO_AUDIO,
108 .length = 4,
109 },
110 {
111 .devid = LOCOMO_DEVID_LED,
112 .irq = {},
113 .name = "locomo-led",
114 .offset = LOCOMO_LED,
115 .length = 8,
116 },
117 {
118 .devid = LOCOMO_DEVID_UART,
119 .irq = {},
120 .name = "locomo-uart",
121 .offset = 0,
122 .length = 0,
123 },
124};
125
126
127/** LoCoMo interrupt handling stuff.
128 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
129 * that is, there is only one real hardware interrupt
130 * we determine which interrupt it is by reading some IO memory.
131 * We have two levels of expansion, first in the handler for the
132 * hardware interrupt we generate an interrupt
133 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
134 *
135 * hardware irq reads LOCOMO_ICR & 0x0f00
136 * IRQ_LOCOMO_KEY_BASE
137 * IRQ_LOCOMO_GPIO_BASE
138 * IRQ_LOCOMO_LT_BASE
139 * IRQ_LOCOMO_SPI_BASE
140 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
141 * IRQ_LOCOMO_KEY
142 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
143 * IRQ_LOCOMO_GPIO[0-15]
144 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
145 * IRQ_LOCOMO_LT
146 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
147 * IRQ_LOCOMO_SPI_RFR
148 * IRQ_LOCOMO_SPI_RFW
149 * IRQ_LOCOMO_SPI_OVRN
150 * IRQ_LOCOMO_SPI_TEND
151 */
152
153#define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
154#define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
155#define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
156#define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
157#define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
158
159static void locomo_handler(unsigned int irq, struct irqdesc *desc,
160 struct pt_regs *regs)
161{
162 int req, i;
163 struct irqdesc *d;
54815366 164 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 165
166 /* Acknowledge the parent IRQ */
167 desc->chip->ack(irq);
168
169 /* check why this interrupt was generated */
170 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
171
172 if (req) {
173 /* generate the next interrupt(s) */
174 irq = LOCOMO_IRQ_START;
175 d = irq_desc + irq;
176 for (i = 0; i <= 3; i++, d++, irq++) {
177 if (req & (0x0100 << i)) {
664399e1 178 desc_handle_irq(irq, d, regs);
1da177e4
LT		 179 }
180
181 }
182 }
183}
184
185static void locomo_ack_irq(unsigned int irq)
186{
187}
188
189static void locomo_mask_irq(unsigned int irq)
190{
54815366 191 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 192 unsigned int r;
193 r = locomo_readl(mapbase + LOCOMO_ICR);
194 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START));
195 locomo_writel(r, mapbase + LOCOMO_ICR);
196}
197
198static void locomo_unmask_irq(unsigned int irq)
199{
54815366 200 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 201 unsigned int r;
202 r = locomo_readl(mapbase + LOCOMO_ICR);
203 r |= (0x0010 << (irq - LOCOMO_IRQ_START));
204 locomo_writel(r, mapbase + LOCOMO_ICR);
205}
206
38c677cb
DB		 207static struct irq_chip locomo_chip = {
208 .name = "LOCOMO",
1da177e4
LT		 209 .ack = locomo_ack_irq,
210 .mask = locomo_mask_irq,
211 .unmask = locomo_unmask_irq,
212};
213
214static void locomo_key_handler(unsigned int irq, struct irqdesc *desc,
215 struct pt_regs *regs)
216{
217 struct irqdesc *d;
54815366 218 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 219
220 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
221 d = irq_desc + LOCOMO_IRQ_KEY_START;
664399e1 222 desc_handle_irq(LOCOMO_IRQ_KEY_START, d, regs);
1da177e4
LT		 223 }
224}
225
226static void locomo_key_ack_irq(unsigned int irq)
227{
54815366 228 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 229 unsigned int r;
230 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
231 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
232 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
233}
234
235static void locomo_key_mask_irq(unsigned int irq)
236{
54815366 237 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 238 unsigned int r;
239 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
240 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
241 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
242}
243
244static void locomo_key_unmask_irq(unsigned int irq)
245{
54815366 246 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 247 unsigned int r;
248 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
249 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
250 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
251}
252
38c677cb
DB		 253static struct irq_chip locomo_key_chip = {
254 .name = "LOCOMO-key",
1da177e4
LT		 255 .ack = locomo_key_ack_irq,
256 .mask = locomo_key_mask_irq,
257 .unmask = locomo_key_unmask_irq,
258};
259
260static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc,
261 struct pt_regs *regs)
262{
263 int req, i;
264 struct irqdesc *d;
54815366 265 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 266
267 req = locomo_readl(mapbase + LOCOMO_GIR) &
268 locomo_readl(mapbase + LOCOMO_GPD) &
269 0xffff;
270
271 if (req) {
272 irq = LOCOMO_IRQ_GPIO_START;
273 d = irq_desc + LOCOMO_IRQ_GPIO_START;
274 for (i = 0; i <= 15; i++, irq++, d++) {
275 if (req & (0x0001 << i)) {
664399e1 276 desc_handle_irq(irq, d, regs);
1da177e4
LT		 277 }
278 }
279 }
280}
281
282static void locomo_gpio_ack_irq(unsigned int irq)
283{
54815366 284 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 285 unsigned int r;
286 r = locomo_readl(mapbase + LOCOMO_GWE);
287 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
288 locomo_writel(r, mapbase + LOCOMO_GWE);
289
290 r = locomo_readl(mapbase + LOCOMO_GIS);
291 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
292 locomo_writel(r, mapbase + LOCOMO_GIS);
293
294 r = locomo_readl(mapbase + LOCOMO_GWE);
295 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
296 locomo_writel(r, mapbase + LOCOMO_GWE);
297}
298
299static void locomo_gpio_mask_irq(unsigned int irq)
300{
54815366 301 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 302 unsigned int r;
303 r = locomo_readl(mapbase + LOCOMO_GIE);
304 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
305 locomo_writel(r, mapbase + LOCOMO_GIE);
306}
307
308static void locomo_gpio_unmask_irq(unsigned int irq)
309{
54815366 310 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 311 unsigned int r;
312 r = locomo_readl(mapbase + LOCOMO_GIE);
313 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
314 locomo_writel(r, mapbase + LOCOMO_GIE);
315}
316
38c677cb
DB		 317static struct irq_chip locomo_gpio_chip = {
318 .name = "LOCOMO-gpio",
1da177e4
LT		 319 .ack = locomo_gpio_ack_irq,
320 .mask = locomo_gpio_mask_irq,
321 .unmask = locomo_gpio_unmask_irq,
322};
323
324static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc,
325 struct pt_regs *regs)
326{
327 struct irqdesc *d;
54815366 328 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 329
330 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
331 d = irq_desc + LOCOMO_IRQ_LT_START;
664399e1 332 desc_handle_irq(LOCOMO_IRQ_LT_START, d, regs);
1da177e4
LT		 333 }
334}
335
336static void locomo_lt_ack_irq(unsigned int irq)
337{
54815366 338 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 339 unsigned int r;
340 r = locomo_readl(mapbase + LOCOMO_LTINT);
341 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
342 locomo_writel(r, mapbase + LOCOMO_LTINT);
343}
344
345static void locomo_lt_mask_irq(unsigned int irq)
346{
54815366 347 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 348 unsigned int r;
349 r = locomo_readl(mapbase + LOCOMO_LTINT);
350 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START));
351 locomo_writel(r, mapbase + LOCOMO_LTINT);
352}
353
354static void locomo_lt_unmask_irq(unsigned int irq)
355{
54815366 356 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 357 unsigned int r;
358 r = locomo_readl(mapbase + LOCOMO_LTINT);
359 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
360 locomo_writel(r, mapbase + LOCOMO_LTINT);
361}
362
38c677cb
DB		 363static struct irq_chip locomo_lt_chip = {
364 .name = "LOCOMO-lt",
1da177e4
LT		 365 .ack = locomo_lt_ack_irq,
366 .mask = locomo_lt_mask_irq,
367 .unmask = locomo_lt_unmask_irq,
368};
369
370static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc,
371 struct pt_regs *regs)
372{
373 int req, i;
374 struct irqdesc *d;
54815366 375 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 376
377 req = locomo_readl(mapbase + LOCOMO_SPIIR) & 0x000F;
378 if (req) {
379 irq = LOCOMO_IRQ_SPI_START;
380 d = irq_desc + irq;
381
382 for (i = 0; i <= 3; i++, irq++, d++) {
383 if (req & (0x0001 << i)) {
664399e1 384 desc_handle_irq(irq, d, regs);
1da177e4
LT		 385 }
386 }
387 }
388}
389
390static void locomo_spi_ack_irq(unsigned int irq)
391{
54815366 392 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 393 unsigned int r;
394 r = locomo_readl(mapbase + LOCOMO_SPIWE);
395 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
396 locomo_writel(r, mapbase + LOCOMO_SPIWE);
397
398 r = locomo_readl(mapbase + LOCOMO_SPIIS);
399 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
400 locomo_writel(r, mapbase + LOCOMO_SPIIS);
401
402 r = locomo_readl(mapbase + LOCOMO_SPIWE);
403 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
404 locomo_writel(r, mapbase + LOCOMO_SPIWE);
405}
406
407static void locomo_spi_mask_irq(unsigned int irq)
408{
54815366 409 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 410 unsigned int r;
411 r = locomo_readl(mapbase + LOCOMO_SPIIE);
412 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
413 locomo_writel(r, mapbase + LOCOMO_SPIIE);
414}
415
416static void locomo_spi_unmask_irq(unsigned int irq)
417{
54815366 418 void __iomem *mapbase = get_irq_chipdata(irq);
1da177e4
LT		 419 unsigned int r;
420 r = locomo_readl(mapbase + LOCOMO_SPIIE);
421 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
422 locomo_writel(r, mapbase + LOCOMO_SPIIE);
423}
424
38c677cb
DB		 425static struct irq_chip locomo_spi_chip = {
426 .name = "LOCOMO-spi",
1da177e4
LT		 427 .ack = locomo_spi_ack_irq,
428 .mask = locomo_spi_mask_irq,
429 .unmask = locomo_spi_unmask_irq,
430};
431
432static void locomo_setup_irq(struct locomo *lchip)
433{
434 int irq;
54815366 435 void __iomem *irqbase = lchip->base;
1da177e4
LT		 436
437 /*
438 * Install handler for IRQ_LOCOMO_HW.
439 */
440 set_irq_type(lchip->irq, IRQT_FALLING);
441 set_irq_chipdata(lchip->irq, irqbase);
442 set_irq_chained_handler(lchip->irq, locomo_handler);
443
444 /* Install handlers for IRQ_LOCOMO_*_BASE */
445 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
446 set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase);
447 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
448 set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE);
449
450 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
451 set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase);
452 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
453 set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE);
454
455 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
456 set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase);
457 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
458 set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE);
459
460 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
461 set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase);
462 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
463 set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE);
464
465 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
466 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
467 set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase);
468 set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ);
469 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
470
471 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
472 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
473 set_irq_chip(irq, &locomo_gpio_chip);
474 set_irq_chipdata(irq, irqbase);
475 set_irq_handler(irq, do_edge_IRQ);
476 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
477 }
478
479 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
480 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
481 set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase);
482 set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ);
483 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
484
485 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
486 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) {
487 set_irq_chip(irq, &locomo_spi_chip);
488 set_irq_chipdata(irq, irqbase);
489 set_irq_handler(irq, do_edge_IRQ);
490 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
491 }
492}
493
494
495static void locomo_dev_release(struct device *_dev)
496{
497 struct locomo_dev *dev = LOCOMO_DEV(_dev);
498
499 kfree(dev);
500}
501
502static int
503locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
504{
505 struct locomo_dev *dev;
506 int ret;
507
d2a02b93 508 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
1da177e4
LT		 509 if (!dev) {
510 ret = -ENOMEM;
511 goto out;
512 }
1da177e4 513
7a2c3029 514 strncpy(dev->dev.bus_id, info->name, sizeof(dev->dev.bus_id));
1da177e4
LT		 515 /*
516 * If the parent device has a DMA mask associated with it,
517 * propagate it down to the children.
518 */
519 if (lchip->dev->dma_mask) {
520 dev->dma_mask = *lchip->dev->dma_mask;
521 dev->dev.dma_mask = &dev->dma_mask;
522 }
523
524 dev->devid = info->devid;
525 dev->dev.parent = lchip->dev;
526 dev->dev.bus = &locomo_bus_type;
527 dev->dev.release = locomo_dev_release;
528 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
529
530 if (info->offset)
531 dev->mapbase = lchip->base + info->offset;
532 else
533 dev->mapbase = 0;
534 dev->length = info->length;
535
536 memmove(dev->irq, info->irq, sizeof(dev->irq));
537
538 ret = device_register(&dev->dev);
539 if (ret) {
540 out:
541 kfree(dev);
542 }
543 return ret;
544}
545
b38d950d
JL		 546#ifdef CONFIG_PM
547
548struct locomo_save_data {
549 u16 LCM_GPO;
550 u16 LCM_SPICT;
551 u16 LCM_GPE;
552 u16 LCM_ASD;
553 u16 LCM_SPIMD;
554};
555
3ae5eaec 556static int locomo_suspend(struct platform_device *dev, pm_message_t state)
b38d950d 557{
3ae5eaec 558 struct locomo *lchip = platform_get_drvdata(dev);
b38d950d
JL		 559 struct locomo_save_data *save;
560 unsigned long flags;
561
b38d950d
JL		 562 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
563 if (!save)
564 return -ENOMEM;
565
3ae5eaec 566 dev->dev.power.saved_state = (void *) save;
b38d950d
JL		 567
568 spin_lock_irqsave(&lchip->lock, flags);
569
570 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
571 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
572 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */
573 locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
574 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
575 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
576 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
577 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
578 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */
579 locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD);
580
581 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
582 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
583 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
584
585 if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) )
586 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
587 else
588 /* 18MHz already enabled, so no wait */
589 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
590
591 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
592 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
593 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
594
595 spin_unlock_irqrestore(&lchip->lock, flags);
596
597 return 0;
598}
599
3ae5eaec 600static int locomo_resume(struct platform_device *dev)
b38d950d 601{
3ae5eaec 602 struct locomo *lchip = platform_get_drvdata(dev);
b38d950d
JL		 603 struct locomo_save_data *save;
604 unsigned long r;
605 unsigned long flags;
606
3ae5eaec 607 save = (struct locomo_save_data *) dev->dev.power.saved_state;
b38d950d
JL		 608 if (!save)
609 return 0;
610
611 spin_lock_irqsave(&lchip->lock, flags);
612
613 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
614 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT);
615 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
616 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
617 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD);
618
619 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
620 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
621
622 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
623 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
624 r &= 0xFEFF;
625 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
626 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
627
628 spin_unlock_irqrestore(&lchip->lock, flags);
b38d950d
JL		 629 kfree(save);
630
631 return 0;
632}
633#endif
634
4ebf2d00 635
1da177e4
LT		 636/**
637 * locomo_probe - probe for a single LoCoMo chip.
638 * @phys_addr: physical address of device.
639 *
640 * Probe for a LoCoMo chip. This must be called
641 * before any other locomo-specific code.
642 *
643 * Returns:
644 * %-ENODEV device not found.
645 * %-EBUSY physical address already marked in-use.
646 * %0 successful.
647 */
648static int
649__locomo_probe(struct device *me, struct resource *mem, int irq)
650{
651 struct locomo *lchip;
652 unsigned long r;
653 int i, ret = -ENODEV;
654
d2a02b93 655 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
1da177e4
LT		 656 if (!lchip)
657 return -ENOMEM;
658
1da177e4
LT		 659 spin_lock_init(&lchip->lock);
660
661 lchip->dev = me;
662 dev_set_drvdata(lchip->dev, lchip);
663
664 lchip->phys = mem->start;
665 lchip->irq = irq;
666
667 /*
668 * Map the whole region. This also maps the
669 * registers for our children.
670 */
671 lchip->base = ioremap(mem->start, PAGE_SIZE);
672 if (!lchip->base) {
673 ret = -ENOMEM;
674 goto out;
675 }
676
677 /* locomo initialize */
678 locomo_writel(0, lchip->base + LOCOMO_ICR);
679 /* KEYBOARD */
680 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
681
682 /* GPIO */
683 locomo_writel(0, lchip->base + LOCOMO_GPO);
684 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
685 , lchip->base + LOCOMO_GPE);
686 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
687 , lchip->base + LOCOMO_GPD);
688 locomo_writel(0, lchip->base + LOCOMO_GIE);
689
e4423781 690 /* Frontlight */
1da177e4
LT		 691 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
692 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
4ebf2d00 693
1da177e4
LT		 694 /* Longtime timer */
695 locomo_writel(0, lchip->base + LOCOMO_LTINT);
696 /* SPI */
697 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
698
699 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
700 r = locomo_readl(lchip->base + LOCOMO_ASD);
701 r |= 0x8000;
702 locomo_writel(r, lchip->base + LOCOMO_ASD);
703
704 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
705 r = locomo_readl(lchip->base + LOCOMO_HSD);
706 r |= 0x8000;
707 locomo_writel(r, lchip->base + LOCOMO_HSD);
708
709 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
710
711 /* XON */
712 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
713 udelay(1000);
714 /* CLK9MEN */
715 r = locomo_readl(lchip->base + LOCOMO_TADC);
716 r |= 0x10;
717 locomo_writel(r, lchip->base + LOCOMO_TADC);
718 udelay(100);
719
720 /* init DAC */
721 r = locomo_readl(lchip->base + LOCOMO_DAC);
722 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
723 locomo_writel(r, lchip->base + LOCOMO_DAC);
724
725 r = locomo_readl(lchip->base + LOCOMO_VER);
726 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
727
728 /*
729 * The interrupt controller must be initialised before any
730 * other device to ensure that the interrupts are available.
731 */
732 if (lchip->irq != NO_IRQ)
733 locomo_setup_irq(lchip);
734
735 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
736 locomo_init_one_child(lchip, &locomo_devices[i]);
1da177e4
LT		 737 return 0;
738
739 out:
740 kfree(lchip);
741 return ret;
742}
743
e24da5d3 744static int locomo_remove_child(struct device *dev, void *data)
1da177e4 745{
e24da5d3
PM		 746 device_unregister(dev);
747 return 0;
748}
1da177e4 749
e24da5d3
PM		 750static void __locomo_remove(struct locomo *lchip)
751{
752 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
1da177e4
LT		 753
754 if (lchip->irq != NO_IRQ) {
755 set_irq_chained_handler(lchip->irq, NULL);
756 set_irq_data(lchip->irq, NULL);
757 }
758
759 iounmap(lchip->base);
760 kfree(lchip);
761}
762
3ae5eaec 763static int locomo_probe(struct platform_device *dev)
1da177e4 764{
1da177e4
LT		 765 struct resource *mem;
766 int irq;
767
3ae5eaec 768 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
1da177e4
LT		 769 if (!mem)
770 return -EINVAL;
3ae5eaec 771 irq = platform_get_irq(dev, 0);
48944738
DV		 772 if (irq < 0)
773 return -ENXIO;
1da177e4 774
3ae5eaec 775 return __locomo_probe(&dev->dev, mem, irq);
1da177e4
LT		 776}
777
3ae5eaec 778static int locomo_remove(struct platform_device *dev)
1da177e4 779{
c35bf4a5 780 struct locomo *lchip = platform_get_drvdata(dev);
1da177e4
LT		 781
782 if (lchip) {
783 __locomo_remove(lchip);
3ae5eaec 784 platform_set_drvdata(dev, NULL);
1da177e4
LT		 785 }
786
787 return 0;
788}
789
790/*
791 * Not sure if this should be on the system bus or not yet.
792 * We really want some way to register a system device at
793 * the per-machine level, and then have this driver pick
794 * up the registered devices.
795 */
3ae5eaec 796static struct platform_driver locomo_device_driver = {
1da177e4
LT		 797 .probe = locomo_probe,
798 .remove = locomo_remove,
b38d950d
JL		 799#ifdef CONFIG_PM
800 .suspend = locomo_suspend,
801 .resume = locomo_resume,
802#endif
3ae5eaec
RK		 803 .driver = {
804 .name = "locomo",
805 },
1da177e4
LT		 806};
807
808/*
809 * Get the parent device driver (us) structure
810 * from a child function device
811 */
812static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
813{
814 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
815}
816
817void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir)
818{
819 struct locomo *lchip = locomo_chip_driver(ldev);
820 unsigned long flags;
821 unsigned int r;
822
823 spin_lock_irqsave(&lchip->lock, flags);
824
825 r = locomo_readl(lchip->base + LOCOMO_GPD);
826 r &= ~bits;
827 locomo_writel(r, lchip->base + LOCOMO_GPD);
828
829 r = locomo_readl(lchip->base + LOCOMO_GPE);
830 if (dir)
831 r |= bits;
832 else
833 r &= ~bits;
834 locomo_writel(r, lchip->base + LOCOMO_GPE);
835
836 spin_unlock_irqrestore(&lchip->lock, flags);
837}
838
839unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits)
840{
841 struct locomo *lchip = locomo_chip_driver(ldev);
842 unsigned long flags;
843 unsigned int ret;
844
845 spin_lock_irqsave(&lchip->lock, flags);
846 ret = locomo_readl(lchip->base + LOCOMO_GPL);
847 spin_unlock_irqrestore(&lchip->lock, flags);
848
849 ret &= bits;
850 return ret;
851}
852
853unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits)
854{
855 struct locomo *lchip = locomo_chip_driver(ldev);
856 unsigned long flags;
857 unsigned int ret;
858
859 spin_lock_irqsave(&lchip->lock, flags);
860 ret = locomo_readl(lchip->base + LOCOMO_GPO);
861 spin_unlock_irqrestore(&lchip->lock, flags);
862
863 ret &= bits;
864 return ret;
865}
866
867void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set)
868{
869 struct locomo *lchip = locomo_chip_driver(ldev);
870 unsigned long flags;
871 unsigned int r;
872
873 spin_lock_irqsave(&lchip->lock, flags);
874
875 r = locomo_readl(lchip->base + LOCOMO_GPO);
876 if (set)
877 r |= bits;
878 else
879 r &= ~bits;
880 locomo_writel(r, lchip->base + LOCOMO_GPO);
881
882 spin_unlock_irqrestore(&lchip->lock, flags);
883}
884
885static void locomo_m62332_sendbit(void *mapbase, int bit)
886{
887 unsigned int r;
888
889 r = locomo_readl(mapbase + LOCOMO_DAC);
890 r &= ~(LOCOMO_DAC_SCLOEB);
891 locomo_writel(r, mapbase + LOCOMO_DAC);
892 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
893 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
894 r = locomo_readl(mapbase + LOCOMO_DAC);
895 r &= ~(LOCOMO_DAC_SCLOEB);
896 locomo_writel(r, mapbase + LOCOMO_DAC);
897 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
898 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
899
900 if (bit & 1) {
901 r = locomo_readl(mapbase + LOCOMO_DAC);
902 r |= LOCOMO_DAC_SDAOEB;
903 locomo_writel(r, mapbase + LOCOMO_DAC);
904 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
905 } else {
906 r = locomo_readl(mapbase + LOCOMO_DAC);
907 r &= ~(LOCOMO_DAC_SDAOEB);
908 locomo_writel(r, mapbase + LOCOMO_DAC);
909 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
910 }
911
912 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
913 r = locomo_readl(mapbase + LOCOMO_DAC);
914 r |= LOCOMO_DAC_SCLOEB;
915 locomo_writel(r, mapbase + LOCOMO_DAC);
916 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
917 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
918}
919
920void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
921{
922 struct locomo *lchip = locomo_chip_driver(ldev);
923 int i;
924 unsigned char data;
925 unsigned int r;
926 void *mapbase = lchip->base;
927 unsigned long flags;
928
929 spin_lock_irqsave(&lchip->lock, flags);
930
931 /* Start */
932 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
933 r = locomo_readl(mapbase + LOCOMO_DAC);
934 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
935 locomo_writel(r, mapbase + LOCOMO_DAC);
936 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
937 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
938 r = locomo_readl(mapbase + LOCOMO_DAC);
939 r &= ~(LOCOMO_DAC_SDAOEB);
940 locomo_writel(r, mapbase + LOCOMO_DAC);
941 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
942 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
943
944 /* Send slave address and W bit (LSB is W bit) */
945 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
946 for (i = 1; i <= 8; i++) {
947 locomo_m62332_sendbit(mapbase, data >> (8 - i));
948 }
949
950 /* Check A bit */
951 r = locomo_readl(mapbase + LOCOMO_DAC);
952 r &= ~(LOCOMO_DAC_SCLOEB);
953 locomo_writel(r, mapbase + LOCOMO_DAC);
954 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
955 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
956 r = locomo_readl(mapbase + LOCOMO_DAC);
957 r &= ~(LOCOMO_DAC_SDAOEB);
958 locomo_writel(r, mapbase + LOCOMO_DAC);
959 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
960 r = locomo_readl(mapbase + LOCOMO_DAC);
961 r |= LOCOMO_DAC_SCLOEB;
962 locomo_writel(r, mapbase + LOCOMO_DAC);
963 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
964 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
965 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
966 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
967 return;
968 }
969
970 /* Send Sub address (LSB is channel select) */
971 /* channel = 0 : ch1 select */
972 /* = 1 : ch2 select */
973 data = M62332_SUB_ADDR + channel;
974 for (i = 1; i <= 8; i++) {
975 locomo_m62332_sendbit(mapbase, data >> (8 - i));
976 }
977
978 /* Check A bit */
979 r = locomo_readl(mapbase + LOCOMO_DAC);
980 r &= ~(LOCOMO_DAC_SCLOEB);
981 locomo_writel(r, mapbase + LOCOMO_DAC);
982 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
983 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
984 r = locomo_readl(mapbase + LOCOMO_DAC);
985 r &= ~(LOCOMO_DAC_SDAOEB);
986 locomo_writel(r, mapbase + LOCOMO_DAC);
987 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
988 r = locomo_readl(mapbase + LOCOMO_DAC);
989 r |= LOCOMO_DAC_SCLOEB;
990 locomo_writel(r, mapbase + LOCOMO_DAC);
991 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
992 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
993 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
994 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
995 return;
996 }
997
998 /* Send DAC data */
999 for (i = 1; i <= 8; i++) {
1000 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
1001 }
1002
1003 /* Check A bit */
1004 r = locomo_readl(mapbase + LOCOMO_DAC);
1005 r &= ~(LOCOMO_DAC_SCLOEB);
1006 locomo_writel(r, mapbase + LOCOMO_DAC);
1007 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1008 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1009 r = locomo_readl(mapbase + LOCOMO_DAC);
1010 r &= ~(LOCOMO_DAC_SDAOEB);
1011 locomo_writel(r, mapbase + LOCOMO_DAC);
1012 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1013 r = locomo_readl(mapbase + LOCOMO_DAC);
1014 r |= LOCOMO_DAC_SCLOEB;
1015 locomo_writel(r, mapbase + LOCOMO_DAC);
1016 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1017 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1018 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1019 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
1020 return;
1021 }
1022
1023 /* stop */
1024 r = locomo_readl(mapbase + LOCOMO_DAC);
1025 r &= ~(LOCOMO_DAC_SCLOEB);
1026 locomo_writel(r, mapbase + LOCOMO_DAC);
1027 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1028 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1029 r = locomo_readl(mapbase + LOCOMO_DAC);
1030 r |= LOCOMO_DAC_SCLOEB;
1031 locomo_writel(r, mapbase + LOCOMO_DAC);
1032 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1033 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1034 r = locomo_readl(mapbase + LOCOMO_DAC);
1035 r |= LOCOMO_DAC_SDAOEB;
1036 locomo_writel(r, mapbase + LOCOMO_DAC);
1037 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1038 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1039
1040 r = locomo_readl(mapbase + LOCOMO_DAC);
1041 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1042 locomo_writel(r, mapbase + LOCOMO_DAC);
1043 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1044 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1045
1046 spin_unlock_irqrestore(&lchip->lock, flags);
1047}
1048
e4423781
RP		 1049/*
1050 * Frontlight control
1051 */
1052
1053static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
1054
1055void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
1056{
1057 unsigned long flags;
1058 struct locomo *lchip = locomo_chip_driver(dev);
1059
1060 if (vr)
1061 locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 1);
1062 else
1063 locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 0);
1064
1065 spin_lock_irqsave(&lchip->lock, flags);
1066 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1067 udelay(100);
1068 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
1069 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1070 spin_unlock_irqrestore(&lchip->lock, flags);
1071}
1072
1da177e4
LT		 1073/*
1074 * LoCoMo "Register Access Bus."
1075 *
1076 * We model this as a regular bus type, and hang devices directly
1077 * off this.
1078 */
1079static int locomo_match(struct device *_dev, struct device_driver *_drv)
1080{
1081 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1082 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1083
1084 return dev->devid == drv->devid;
1085}
1086
1087static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1088{
1089 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1090 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1091 int ret = 0;
1092
1093 if (drv && drv->suspend)
1094 ret = drv->suspend(ldev, state);
1095 return ret;
1096}
1097
1098static int locomo_bus_resume(struct device *dev)
1099{
1100 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1101 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1102 int ret = 0;
1103
1104 if (drv && drv->resume)
1105 ret = drv->resume(ldev);
1106 return ret;
1107}
1108
1109static int locomo_bus_probe(struct device *dev)
1110{
1111 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1112 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1113 int ret = -ENODEV;
1114
1115 if (drv->probe)
1116 ret = drv->probe(ldev);
1117 return ret;
1118}
1119
1120static int locomo_bus_remove(struct device *dev)
1121{
1122 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1123 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1124 int ret = 0;
1125
1126 if (drv->remove)
1127 ret = drv->remove(ldev);
1128 return ret;
1129}
1130
1131struct bus_type locomo_bus_type = {
1132 .name = "locomo-bus",
1133 .match = locomo_match,
306955be
RK		 1134 .probe = locomo_bus_probe,
1135 .remove = locomo_bus_remove,
1da177e4
LT		 1136 .suspend = locomo_bus_suspend,
1137 .resume = locomo_bus_resume,
1138};
1139
1140int locomo_driver_register(struct locomo_driver *driver)
1141{
1da177e4
LT		 1142 driver->drv.bus = &locomo_bus_type;
1143 return driver_register(&driver->drv);
1144}
1145
1146void locomo_driver_unregister(struct locomo_driver *driver)
1147{
1148 driver_unregister(&driver->drv);
1149}
1150
1151static int __init locomo_init(void)
1152{
1153 int ret = bus_register(&locomo_bus_type);
1154 if (ret == 0)
3ae5eaec 1155 platform_driver_register(&locomo_device_driver);
1da177e4
LT		 1156 return ret;
1157}
1158
1159static void __exit locomo_exit(void)
1160{
3ae5eaec 1161 platform_driver_unregister(&locomo_device_driver);
1da177e4
LT		 1162 bus_unregister(&locomo_bus_type);
1163}
1164
1165module_init(locomo_init);
1166module_exit(locomo_exit);
1167
1168MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1169MODULE_LICENSE("GPL");
1170MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1171
1172EXPORT_SYMBOL(locomo_driver_register);
1173EXPORT_SYMBOL(locomo_driver_unregister);
1174EXPORT_SYMBOL(locomo_gpio_set_dir);
1175EXPORT_SYMBOL(locomo_gpio_read_level);
1176EXPORT_SYMBOL(locomo_gpio_read_output);
1177EXPORT_SYMBOL(locomo_gpio_write);
1178EXPORT_SYMBOL(locomo_m62332_senddata);
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