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