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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/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> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/io.h> | |
28 | ||
29 | #include <mach/hardware.h> | |
30 | #include <asm/irq.h> | |
31 | #include <asm/mach/irq.h> | |
32 | ||
33 | #include <asm/hardware/locomo.h> | |
34 | ||
35 | /* LoCoMo Interrupts */ | |
36 | #define IRQ_LOCOMO_KEY (0) | |
37 | #define IRQ_LOCOMO_GPIO (1) | |
38 | #define IRQ_LOCOMO_LT (2) | |
39 | #define IRQ_LOCOMO_SPI (3) | |
40 | ||
41 | /* M62332 output channel selection */ | |
42 | #define M62332_EVR_CH 1 /* M62332 volume channel number */ | |
43 | /* 0 : CH.1 , 1 : CH. 2 */ | |
44 | /* DAC send data */ | |
45 | #define M62332_SLAVE_ADDR 0x4e /* Slave address */ | |
46 | #define M62332_W_BIT 0x00 /* W bit (0 only) */ | |
47 | #define M62332_SUB_ADDR 0x00 /* Sub address */ | |
48 | #define M62332_A_BIT 0x00 /* A bit (0 only) */ | |
49 | ||
50 | /* DAC setup and hold times (expressed in us) */ | |
51 | #define DAC_BUS_FREE_TIME 5 /* 4.7 us */ | |
52 | #define DAC_START_SETUP_TIME 5 /* 4.7 us */ | |
53 | #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */ | |
54 | #define DAC_START_HOLD_TIME 5 /* 4.7 us */ | |
55 | #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */ | |
56 | #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */ | |
57 | #define DAC_DATA_SETUP_TIME 1 /* 250 ns */ | |
58 | #define DAC_DATA_HOLD_TIME 1 /* 300 ns */ | |
59 | #define DAC_LOW_SETUP_TIME 1 /* 300 ns */ | |
60 | #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */ | |
61 | ||
62 | /* the following is the overall data for the locomo chip */ | |
63 | struct locomo { | |
64 | struct device *dev; | |
65 | unsigned long phys; | |
66 | unsigned int irq; | |
67 | int irq_base; | |
68 | spinlock_t lock; | |
69 | void __iomem *base; | |
70 | #ifdef CONFIG_PM | |
71 | void *saved_state; | |
72 | #endif | |
73 | }; | |
74 | ||
75 | struct locomo_dev_info { | |
76 | unsigned long offset; | |
77 | unsigned long length; | |
78 | unsigned int devid; | |
79 | unsigned int irq[1]; | |
80 | const char * name; | |
81 | }; | |
82 | ||
83 | /* All the locomo devices. If offset is non-zero, the mapbase for the | |
84 | * locomo_dev will be set to the chip base plus offset. If offset is | |
85 | * zero, then the mapbase for the locomo_dev will be set to zero. An | |
86 | * offset of zero means the device only uses GPIOs or other helper | |
87 | * functions inside this file */ | |
88 | static struct locomo_dev_info locomo_devices[] = { | |
89 | { | |
90 | .devid = LOCOMO_DEVID_KEYBOARD, | |
91 | .irq = { IRQ_LOCOMO_KEY }, | |
92 | .name = "locomo-keyboard", | |
93 | .offset = LOCOMO_KEYBOARD, | |
94 | .length = 16, | |
95 | }, | |
96 | { | |
97 | .devid = LOCOMO_DEVID_FRONTLIGHT, | |
98 | .irq = {}, | |
99 | .name = "locomo-frontlight", | |
100 | .offset = LOCOMO_FRONTLIGHT, | |
101 | .length = 8, | |
102 | ||
103 | }, | |
104 | { | |
105 | .devid = LOCOMO_DEVID_BACKLIGHT, | |
106 | .irq = {}, | |
107 | .name = "locomo-backlight", | |
108 | .offset = LOCOMO_BACKLIGHT, | |
109 | .length = 8, | |
110 | }, | |
111 | { | |
112 | .devid = LOCOMO_DEVID_AUDIO, | |
113 | .irq = {}, | |
114 | .name = "locomo-audio", | |
115 | .offset = LOCOMO_AUDIO, | |
116 | .length = 4, | |
117 | }, | |
118 | { | |
119 | .devid = LOCOMO_DEVID_LED, | |
120 | .irq = {}, | |
121 | .name = "locomo-led", | |
122 | .offset = LOCOMO_LED, | |
123 | .length = 8, | |
124 | }, | |
125 | { | |
126 | .devid = LOCOMO_DEVID_UART, | |
127 | .irq = {}, | |
128 | .name = "locomo-uart", | |
129 | .offset = 0, | |
130 | .length = 0, | |
131 | }, | |
132 | { | |
133 | .devid = LOCOMO_DEVID_SPI, | |
134 | .irq = {}, | |
135 | .name = "locomo-spi", | |
136 | .offset = LOCOMO_SPI, | |
137 | .length = 0x30, | |
138 | }, | |
139 | }; | |
140 | ||
141 | static void locomo_handler(struct irq_desc *desc) | |
142 | { | |
143 | struct locomo *lchip = irq_desc_get_chip_data(desc); | |
144 | int req, i; | |
145 | ||
146 | /* Acknowledge the parent IRQ */ | |
147 | desc->irq_data.chip->irq_ack(&desc->irq_data); | |
148 | ||
149 | /* check why this interrupt was generated */ | |
150 | req = locomo_readl(lchip->base + LOCOMO_ICR) & 0x0f00; | |
151 | ||
152 | if (req) { | |
153 | unsigned int irq; | |
154 | ||
155 | /* generate the next interrupt(s) */ | |
156 | irq = lchip->irq_base; | |
157 | for (i = 0; i <= 3; i++, irq++) { | |
158 | if (req & (0x0100 << i)) { | |
159 | generic_handle_irq(irq); | |
160 | } | |
161 | ||
162 | } | |
163 | } | |
164 | } | |
165 | ||
166 | static void locomo_ack_irq(struct irq_data *d) | |
167 | { | |
168 | } | |
169 | ||
170 | static void locomo_mask_irq(struct irq_data *d) | |
171 | { | |
172 | struct locomo *lchip = irq_data_get_irq_chip_data(d); | |
173 | unsigned int r; | |
174 | r = locomo_readl(lchip->base + LOCOMO_ICR); | |
175 | r &= ~(0x0010 << (d->irq - lchip->irq_base)); | |
176 | locomo_writel(r, lchip->base + LOCOMO_ICR); | |
177 | } | |
178 | ||
179 | static void locomo_unmask_irq(struct irq_data *d) | |
180 | { | |
181 | struct locomo *lchip = irq_data_get_irq_chip_data(d); | |
182 | unsigned int r; | |
183 | r = locomo_readl(lchip->base + LOCOMO_ICR); | |
184 | r |= (0x0010 << (d->irq - lchip->irq_base)); | |
185 | locomo_writel(r, lchip->base + LOCOMO_ICR); | |
186 | } | |
187 | ||
188 | static struct irq_chip locomo_chip = { | |
189 | .name = "LOCOMO", | |
190 | .irq_ack = locomo_ack_irq, | |
191 | .irq_mask = locomo_mask_irq, | |
192 | .irq_unmask = locomo_unmask_irq, | |
193 | }; | |
194 | ||
195 | static void locomo_setup_irq(struct locomo *lchip) | |
196 | { | |
197 | int irq = lchip->irq_base; | |
198 | ||
199 | /* | |
200 | * Install handler for IRQ_LOCOMO_HW. | |
201 | */ | |
202 | irq_set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING); | |
203 | irq_set_chip_data(lchip->irq, lchip); | |
204 | irq_set_chained_handler(lchip->irq, locomo_handler); | |
205 | ||
206 | /* Install handlers for IRQ_LOCOMO_* */ | |
207 | for ( ; irq <= lchip->irq_base + 3; irq++) { | |
208 | irq_set_chip_and_handler(irq, &locomo_chip, handle_level_irq); | |
209 | irq_set_chip_data(irq, lchip); | |
210 | irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); | |
211 | } | |
212 | } | |
213 | ||
214 | ||
215 | static void locomo_dev_release(struct device *_dev) | |
216 | { | |
217 | struct locomo_dev *dev = LOCOMO_DEV(_dev); | |
218 | ||
219 | kfree(dev); | |
220 | } | |
221 | ||
222 | static int | |
223 | locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) | |
224 | { | |
225 | struct locomo_dev *dev; | |
226 | int ret; | |
227 | ||
228 | dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL); | |
229 | if (!dev) { | |
230 | ret = -ENOMEM; | |
231 | goto out; | |
232 | } | |
233 | ||
234 | /* | |
235 | * If the parent device has a DMA mask associated with it, | |
236 | * propagate it down to the children. | |
237 | */ | |
238 | if (lchip->dev->dma_mask) { | |
239 | dev->dma_mask = *lchip->dev->dma_mask; | |
240 | dev->dev.dma_mask = &dev->dma_mask; | |
241 | } | |
242 | ||
243 | dev_set_name(&dev->dev, "%s", info->name); | |
244 | dev->devid = info->devid; | |
245 | dev->dev.parent = lchip->dev; | |
246 | dev->dev.bus = &locomo_bus_type; | |
247 | dev->dev.release = locomo_dev_release; | |
248 | dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask; | |
249 | ||
250 | if (info->offset) | |
251 | dev->mapbase = lchip->base + info->offset; | |
252 | else | |
253 | dev->mapbase = 0; | |
254 | dev->length = info->length; | |
255 | ||
256 | dev->irq[0] = (lchip->irq_base == NO_IRQ) ? | |
257 | NO_IRQ : lchip->irq_base + info->irq[0]; | |
258 | ||
259 | ret = device_register(&dev->dev); | |
260 | if (ret) { | |
261 | out: | |
262 | kfree(dev); | |
263 | } | |
264 | return ret; | |
265 | } | |
266 | ||
267 | #ifdef CONFIG_PM | |
268 | ||
269 | struct locomo_save_data { | |
270 | u16 LCM_GPO; | |
271 | u16 LCM_SPICT; | |
272 | u16 LCM_GPE; | |
273 | u16 LCM_ASD; | |
274 | u16 LCM_SPIMD; | |
275 | }; | |
276 | ||
277 | static int locomo_suspend(struct platform_device *dev, pm_message_t state) | |
278 | { | |
279 | struct locomo *lchip = platform_get_drvdata(dev); | |
280 | struct locomo_save_data *save; | |
281 | unsigned long flags; | |
282 | ||
283 | save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL); | |
284 | if (!save) | |
285 | return -ENOMEM; | |
286 | ||
287 | lchip->saved_state = save; | |
288 | ||
289 | spin_lock_irqsave(&lchip->lock, flags); | |
290 | ||
291 | save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */ | |
292 | locomo_writel(0x00, lchip->base + LOCOMO_GPO); | |
293 | save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */ | |
294 | locomo_writel(0x40, lchip->base + LOCOMO_SPI + LOCOMO_SPICT); | |
295 | save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */ | |
296 | locomo_writel(0x00, lchip->base + LOCOMO_GPE); | |
297 | save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */ | |
298 | locomo_writel(0x00, lchip->base + LOCOMO_ASD); | |
299 | save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */ | |
300 | locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); | |
301 | ||
302 | locomo_writel(0x00, lchip->base + LOCOMO_PAIF); | |
303 | locomo_writel(0x00, lchip->base + LOCOMO_DAC); | |
304 | locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC); | |
305 | ||
306 | if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88)) | |
307 | locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */ | |
308 | else | |
309 | /* 18MHz already enabled, so no wait */ | |
310 | locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */ | |
311 | ||
312 | locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/ | |
313 | locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */ | |
314 | locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */ | |
315 | ||
316 | spin_unlock_irqrestore(&lchip->lock, flags); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | static int locomo_resume(struct platform_device *dev) | |
322 | { | |
323 | struct locomo *lchip = platform_get_drvdata(dev); | |
324 | struct locomo_save_data *save; | |
325 | unsigned long r; | |
326 | unsigned long flags; | |
327 | ||
328 | save = lchip->saved_state; | |
329 | if (!save) | |
330 | return 0; | |
331 | ||
332 | spin_lock_irqsave(&lchip->lock, flags); | |
333 | ||
334 | locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO); | |
335 | locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT); | |
336 | locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE); | |
337 | locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD); | |
338 | locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); | |
339 | ||
340 | locomo_writel(0x00, lchip->base + LOCOMO_C32K); | |
341 | locomo_writel(0x90, lchip->base + LOCOMO_TADC); | |
342 | ||
343 | locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC); | |
344 | r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); | |
345 | r &= 0xFEFF; | |
346 | locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); | |
347 | locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD); | |
348 | ||
349 | spin_unlock_irqrestore(&lchip->lock, flags); | |
350 | ||
351 | lchip->saved_state = NULL; | |
352 | kfree(save); | |
353 | ||
354 | return 0; | |
355 | } | |
356 | #endif | |
357 | ||
358 | ||
359 | /** | |
360 | * locomo_probe - probe for a single LoCoMo chip. | |
361 | * @phys_addr: physical address of device. | |
362 | * | |
363 | * Probe for a LoCoMo chip. This must be called | |
364 | * before any other locomo-specific code. | |
365 | * | |
366 | * Returns: | |
367 | * %-ENODEV device not found. | |
368 | * %-EBUSY physical address already marked in-use. | |
369 | * %0 successful. | |
370 | */ | |
371 | static int | |
372 | __locomo_probe(struct device *me, struct resource *mem, int irq) | |
373 | { | |
374 | struct locomo_platform_data *pdata = me->platform_data; | |
375 | struct locomo *lchip; | |
376 | unsigned long r; | |
377 | int i, ret = -ENODEV; | |
378 | ||
379 | lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL); | |
380 | if (!lchip) | |
381 | return -ENOMEM; | |
382 | ||
383 | spin_lock_init(&lchip->lock); | |
384 | ||
385 | lchip->dev = me; | |
386 | dev_set_drvdata(lchip->dev, lchip); | |
387 | ||
388 | lchip->phys = mem->start; | |
389 | lchip->irq = irq; | |
390 | lchip->irq_base = (pdata) ? pdata->irq_base : NO_IRQ; | |
391 | ||
392 | /* | |
393 | * Map the whole region. This also maps the | |
394 | * registers for our children. | |
395 | */ | |
396 | lchip->base = ioremap(mem->start, PAGE_SIZE); | |
397 | if (!lchip->base) { | |
398 | ret = -ENOMEM; | |
399 | goto out; | |
400 | } | |
401 | ||
402 | /* locomo initialize */ | |
403 | locomo_writel(0, lchip->base + LOCOMO_ICR); | |
404 | /* KEYBOARD */ | |
405 | locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); | |
406 | ||
407 | /* GPIO */ | |
408 | locomo_writel(0, lchip->base + LOCOMO_GPO); | |
409 | locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) | |
410 | , lchip->base + LOCOMO_GPE); | |
411 | locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) | |
412 | , lchip->base + LOCOMO_GPD); | |
413 | locomo_writel(0, lchip->base + LOCOMO_GIE); | |
414 | ||
415 | /* Frontlight */ | |
416 | locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); | |
417 | locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); | |
418 | ||
419 | /* Longtime timer */ | |
420 | locomo_writel(0, lchip->base + LOCOMO_LTINT); | |
421 | /* SPI */ | |
422 | locomo_writel(0, lchip->base + LOCOMO_SPI + LOCOMO_SPIIE); | |
423 | ||
424 | locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); | |
425 | r = locomo_readl(lchip->base + LOCOMO_ASD); | |
426 | r |= 0x8000; | |
427 | locomo_writel(r, lchip->base + LOCOMO_ASD); | |
428 | ||
429 | locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); | |
430 | r = locomo_readl(lchip->base + LOCOMO_HSD); | |
431 | r |= 0x8000; | |
432 | locomo_writel(r, lchip->base + LOCOMO_HSD); | |
433 | ||
434 | locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); | |
435 | ||
436 | /* XON */ | |
437 | locomo_writel(0x80, lchip->base + LOCOMO_TADC); | |
438 | udelay(1000); | |
439 | /* CLK9MEN */ | |
440 | r = locomo_readl(lchip->base + LOCOMO_TADC); | |
441 | r |= 0x10; | |
442 | locomo_writel(r, lchip->base + LOCOMO_TADC); | |
443 | udelay(100); | |
444 | ||
445 | /* init DAC */ | |
446 | r = locomo_readl(lchip->base + LOCOMO_DAC); | |
447 | r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; | |
448 | locomo_writel(r, lchip->base + LOCOMO_DAC); | |
449 | ||
450 | r = locomo_readl(lchip->base + LOCOMO_VER); | |
451 | printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); | |
452 | ||
453 | /* | |
454 | * The interrupt controller must be initialised before any | |
455 | * other device to ensure that the interrupts are available. | |
456 | */ | |
457 | if (lchip->irq != NO_IRQ && lchip->irq_base != NO_IRQ) | |
458 | locomo_setup_irq(lchip); | |
459 | ||
460 | for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) | |
461 | locomo_init_one_child(lchip, &locomo_devices[i]); | |
462 | return 0; | |
463 | ||
464 | out: | |
465 | kfree(lchip); | |
466 | return ret; | |
467 | } | |
468 | ||
469 | static int locomo_remove_child(struct device *dev, void *data) | |
470 | { | |
471 | device_unregister(dev); | |
472 | return 0; | |
473 | } | |
474 | ||
475 | static void __locomo_remove(struct locomo *lchip) | |
476 | { | |
477 | device_for_each_child(lchip->dev, NULL, locomo_remove_child); | |
478 | ||
479 | if (lchip->irq != NO_IRQ) { | |
480 | irq_set_chained_handler_and_data(lchip->irq, NULL, NULL); | |
481 | } | |
482 | ||
483 | iounmap(lchip->base); | |
484 | kfree(lchip); | |
485 | } | |
486 | ||
487 | static int locomo_probe(struct platform_device *dev) | |
488 | { | |
489 | struct resource *mem; | |
490 | int irq; | |
491 | ||
492 | mem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
493 | if (!mem) | |
494 | return -EINVAL; | |
495 | irq = platform_get_irq(dev, 0); | |
496 | if (irq < 0) | |
497 | return -ENXIO; | |
498 | ||
499 | return __locomo_probe(&dev->dev, mem, irq); | |
500 | } | |
501 | ||
502 | static int locomo_remove(struct platform_device *dev) | |
503 | { | |
504 | struct locomo *lchip = platform_get_drvdata(dev); | |
505 | ||
506 | if (lchip) { | |
507 | __locomo_remove(lchip); | |
508 | platform_set_drvdata(dev, NULL); | |
509 | } | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
514 | /* | |
515 | * Not sure if this should be on the system bus or not yet. | |
516 | * We really want some way to register a system device at | |
517 | * the per-machine level, and then have this driver pick | |
518 | * up the registered devices. | |
519 | */ | |
520 | static struct platform_driver locomo_device_driver = { | |
521 | .probe = locomo_probe, | |
522 | .remove = locomo_remove, | |
523 | #ifdef CONFIG_PM | |
524 | .suspend = locomo_suspend, | |
525 | .resume = locomo_resume, | |
526 | #endif | |
527 | .driver = { | |
528 | .name = "locomo", | |
529 | }, | |
530 | }; | |
531 | ||
532 | /* | |
533 | * Get the parent device driver (us) structure | |
534 | * from a child function device | |
535 | */ | |
536 | static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) | |
537 | { | |
538 | return (struct locomo *)dev_get_drvdata(ldev->dev.parent); | |
539 | } | |
540 | ||
541 | void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir) | |
542 | { | |
543 | struct locomo *lchip = dev_get_drvdata(dev); | |
544 | unsigned long flags; | |
545 | unsigned int r; | |
546 | ||
547 | if (!lchip) | |
548 | return; | |
549 | ||
550 | spin_lock_irqsave(&lchip->lock, flags); | |
551 | ||
552 | r = locomo_readl(lchip->base + LOCOMO_GPD); | |
553 | if (dir) | |
554 | r |= bits; | |
555 | else | |
556 | r &= ~bits; | |
557 | locomo_writel(r, lchip->base + LOCOMO_GPD); | |
558 | ||
559 | r = locomo_readl(lchip->base + LOCOMO_GPE); | |
560 | if (dir) | |
561 | r |= bits; | |
562 | else | |
563 | r &= ~bits; | |
564 | locomo_writel(r, lchip->base + LOCOMO_GPE); | |
565 | ||
566 | spin_unlock_irqrestore(&lchip->lock, flags); | |
567 | } | |
568 | EXPORT_SYMBOL(locomo_gpio_set_dir); | |
569 | ||
570 | int locomo_gpio_read_level(struct device *dev, unsigned int bits) | |
571 | { | |
572 | struct locomo *lchip = dev_get_drvdata(dev); | |
573 | unsigned long flags; | |
574 | unsigned int ret; | |
575 | ||
576 | if (!lchip) | |
577 | return -ENODEV; | |
578 | ||
579 | spin_lock_irqsave(&lchip->lock, flags); | |
580 | ret = locomo_readl(lchip->base + LOCOMO_GPL); | |
581 | spin_unlock_irqrestore(&lchip->lock, flags); | |
582 | ||
583 | ret &= bits; | |
584 | return ret; | |
585 | } | |
586 | EXPORT_SYMBOL(locomo_gpio_read_level); | |
587 | ||
588 | int locomo_gpio_read_output(struct device *dev, unsigned int bits) | |
589 | { | |
590 | struct locomo *lchip = dev_get_drvdata(dev); | |
591 | unsigned long flags; | |
592 | unsigned int ret; | |
593 | ||
594 | if (!lchip) | |
595 | return -ENODEV; | |
596 | ||
597 | spin_lock_irqsave(&lchip->lock, flags); | |
598 | ret = locomo_readl(lchip->base + LOCOMO_GPO); | |
599 | spin_unlock_irqrestore(&lchip->lock, flags); | |
600 | ||
601 | ret &= bits; | |
602 | return ret; | |
603 | } | |
604 | EXPORT_SYMBOL(locomo_gpio_read_output); | |
605 | ||
606 | void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set) | |
607 | { | |
608 | struct locomo *lchip = dev_get_drvdata(dev); | |
609 | unsigned long flags; | |
610 | unsigned int r; | |
611 | ||
612 | if (!lchip) | |
613 | return; | |
614 | ||
615 | spin_lock_irqsave(&lchip->lock, flags); | |
616 | ||
617 | r = locomo_readl(lchip->base + LOCOMO_GPO); | |
618 | if (set) | |
619 | r |= bits; | |
620 | else | |
621 | r &= ~bits; | |
622 | locomo_writel(r, lchip->base + LOCOMO_GPO); | |
623 | ||
624 | spin_unlock_irqrestore(&lchip->lock, flags); | |
625 | } | |
626 | EXPORT_SYMBOL(locomo_gpio_write); | |
627 | ||
628 | static void locomo_m62332_sendbit(void *mapbase, int bit) | |
629 | { | |
630 | unsigned int r; | |
631 | ||
632 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
633 | r &= ~(LOCOMO_DAC_SCLOEB); | |
634 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
635 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
636 | udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ | |
637 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
638 | r &= ~(LOCOMO_DAC_SCLOEB); | |
639 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
640 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
641 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
642 | ||
643 | if (bit & 1) { | |
644 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
645 | r |= LOCOMO_DAC_SDAOEB; | |
646 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
647 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
648 | } else { | |
649 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
650 | r &= ~(LOCOMO_DAC_SDAOEB); | |
651 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
652 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
653 | } | |
654 | ||
655 | udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */ | |
656 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
657 | r |= LOCOMO_DAC_SCLOEB; | |
658 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
659 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
660 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ | |
661 | } | |
662 | ||
663 | void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) | |
664 | { | |
665 | struct locomo *lchip = locomo_chip_driver(ldev); | |
666 | int i; | |
667 | unsigned char data; | |
668 | unsigned int r; | |
669 | void *mapbase = lchip->base; | |
670 | unsigned long flags; | |
671 | ||
672 | spin_lock_irqsave(&lchip->lock, flags); | |
673 | ||
674 | /* Start */ | |
675 | udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ | |
676 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
677 | r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; | |
678 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
679 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
680 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ | |
681 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
682 | r &= ~(LOCOMO_DAC_SDAOEB); | |
683 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
684 | udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ | |
685 | udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ | |
686 | ||
687 | /* Send slave address and W bit (LSB is W bit) */ | |
688 | data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; | |
689 | for (i = 1; i <= 8; i++) { | |
690 | locomo_m62332_sendbit(mapbase, data >> (8 - i)); | |
691 | } | |
692 | ||
693 | /* Check A bit */ | |
694 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
695 | r &= ~(LOCOMO_DAC_SCLOEB); | |
696 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
697 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
698 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
699 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
700 | r &= ~(LOCOMO_DAC_SDAOEB); | |
701 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
702 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
703 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
704 | r |= LOCOMO_DAC_SCLOEB; | |
705 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
706 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
707 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ | |
708 | if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ | |
709 | printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); | |
710 | goto out; | |
711 | } | |
712 | ||
713 | /* Send Sub address (LSB is channel select) */ | |
714 | /* channel = 0 : ch1 select */ | |
715 | /* = 1 : ch2 select */ | |
716 | data = M62332_SUB_ADDR + channel; | |
717 | for (i = 1; i <= 8; i++) { | |
718 | locomo_m62332_sendbit(mapbase, data >> (8 - i)); | |
719 | } | |
720 | ||
721 | /* Check A bit */ | |
722 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
723 | r &= ~(LOCOMO_DAC_SCLOEB); | |
724 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
725 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
726 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
727 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
728 | r &= ~(LOCOMO_DAC_SDAOEB); | |
729 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
730 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
731 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
732 | r |= LOCOMO_DAC_SCLOEB; | |
733 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
734 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
735 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ | |
736 | if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ | |
737 | printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); | |
738 | goto out; | |
739 | } | |
740 | ||
741 | /* Send DAC data */ | |
742 | for (i = 1; i <= 8; i++) { | |
743 | locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); | |
744 | } | |
745 | ||
746 | /* Check A bit */ | |
747 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
748 | r &= ~(LOCOMO_DAC_SCLOEB); | |
749 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
750 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
751 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
752 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
753 | r &= ~(LOCOMO_DAC_SDAOEB); | |
754 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
755 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
756 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
757 | r |= LOCOMO_DAC_SCLOEB; | |
758 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
759 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
760 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ | |
761 | if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ | |
762 | printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); | |
763 | } | |
764 | ||
765 | out: | |
766 | /* stop */ | |
767 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
768 | r &= ~(LOCOMO_DAC_SCLOEB); | |
769 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
770 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
771 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
772 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
773 | r |= LOCOMO_DAC_SCLOEB; | |
774 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
775 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
776 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ | |
777 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
778 | r |= LOCOMO_DAC_SDAOEB; | |
779 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
780 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
781 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ | |
782 | ||
783 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
784 | r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; | |
785 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
786 | udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ | |
787 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
788 | ||
789 | spin_unlock_irqrestore(&lchip->lock, flags); | |
790 | } | |
791 | EXPORT_SYMBOL(locomo_m62332_senddata); | |
792 | ||
793 | /* | |
794 | * Frontlight control | |
795 | */ | |
796 | ||
797 | void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf) | |
798 | { | |
799 | unsigned long flags; | |
800 | struct locomo *lchip = locomo_chip_driver(dev); | |
801 | ||
802 | if (vr) | |
803 | locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1); | |
804 | else | |
805 | locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0); | |
806 | ||
807 | spin_lock_irqsave(&lchip->lock, flags); | |
808 | locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); | |
809 | udelay(100); | |
810 | locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); | |
811 | locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); | |
812 | spin_unlock_irqrestore(&lchip->lock, flags); | |
813 | } | |
814 | EXPORT_SYMBOL(locomo_frontlight_set); | |
815 | ||
816 | /* | |
817 | * LoCoMo "Register Access Bus." | |
818 | * | |
819 | * We model this as a regular bus type, and hang devices directly | |
820 | * off this. | |
821 | */ | |
822 | static int locomo_match(struct device *_dev, struct device_driver *_drv) | |
823 | { | |
824 | struct locomo_dev *dev = LOCOMO_DEV(_dev); | |
825 | struct locomo_driver *drv = LOCOMO_DRV(_drv); | |
826 | ||
827 | return dev->devid == drv->devid; | |
828 | } | |
829 | ||
830 | static int locomo_bus_suspend(struct device *dev, pm_message_t state) | |
831 | { | |
832 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
833 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
834 | int ret = 0; | |
835 | ||
836 | if (drv && drv->suspend) | |
837 | ret = drv->suspend(ldev, state); | |
838 | return ret; | |
839 | } | |
840 | ||
841 | static int locomo_bus_resume(struct device *dev) | |
842 | { | |
843 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
844 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
845 | int ret = 0; | |
846 | ||
847 | if (drv && drv->resume) | |
848 | ret = drv->resume(ldev); | |
849 | return ret; | |
850 | } | |
851 | ||
852 | static int locomo_bus_probe(struct device *dev) | |
853 | { | |
854 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
855 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
856 | int ret = -ENODEV; | |
857 | ||
858 | if (drv->probe) | |
859 | ret = drv->probe(ldev); | |
860 | return ret; | |
861 | } | |
862 | ||
863 | static int locomo_bus_remove(struct device *dev) | |
864 | { | |
865 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
866 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
867 | int ret = 0; | |
868 | ||
869 | if (drv->remove) | |
870 | ret = drv->remove(ldev); | |
871 | return ret; | |
872 | } | |
873 | ||
874 | struct bus_type locomo_bus_type = { | |
875 | .name = "locomo-bus", | |
876 | .match = locomo_match, | |
877 | .probe = locomo_bus_probe, | |
878 | .remove = locomo_bus_remove, | |
879 | .suspend = locomo_bus_suspend, | |
880 | .resume = locomo_bus_resume, | |
881 | }; | |
882 | ||
883 | int locomo_driver_register(struct locomo_driver *driver) | |
884 | { | |
885 | driver->drv.bus = &locomo_bus_type; | |
886 | return driver_register(&driver->drv); | |
887 | } | |
888 | EXPORT_SYMBOL(locomo_driver_register); | |
889 | ||
890 | void locomo_driver_unregister(struct locomo_driver *driver) | |
891 | { | |
892 | driver_unregister(&driver->drv); | |
893 | } | |
894 | EXPORT_SYMBOL(locomo_driver_unregister); | |
895 | ||
896 | static int __init locomo_init(void) | |
897 | { | |
898 | int ret = bus_register(&locomo_bus_type); | |
899 | if (ret == 0) | |
900 | platform_driver_register(&locomo_device_driver); | |
901 | return ret; | |
902 | } | |
903 | ||
904 | static void __exit locomo_exit(void) | |
905 | { | |
906 | platform_driver_unregister(&locomo_device_driver); | |
907 | bus_unregister(&locomo_bus_type); | |
908 | } | |
909 | ||
910 | module_init(locomo_init); | |
911 | module_exit(locomo_exit); | |
912 | ||
913 | MODULE_DESCRIPTION("Sharp LoCoMo core driver"); | |
914 | MODULE_LICENSE("GPL"); | |
915 | MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); |