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Commit | Line | Data |
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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 | ||
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> | |
fced80c7 | 27 | #include <linux/io.h> |
1da177e4 | 28 | |
a09e64fb | 29 | #include <mach/hardware.h> |
1da177e4 LT |
30 | #include <asm/irq.h> |
31 | #include <asm/mach/irq.h> | |
32 | ||
33 | #include <asm/hardware/locomo.h> | |
34 | ||
ac609d26 EM |
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 | ||
1da177e4 LT |
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; | |
ac609d26 | 67 | int irq_base; |
1da177e4 | 68 | spinlock_t lock; |
54815366 | 69 | void __iomem *base; |
93160c63 RW |
70 | #ifdef CONFIG_PM |
71 | void *saved_state; | |
72 | #endif | |
1da177e4 LT |
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, | |
ac609d26 | 91 | .irq = { IRQ_LOCOMO_KEY }, |
1da177e4 LT |
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 | }, | |
a2025e7f DO |
132 | { |
133 | .devid = LOCOMO_DEVID_SPI, | |
134 | .irq = {}, | |
135 | .name = "locomo-spi", | |
136 | .offset = LOCOMO_SPI, | |
137 | .length = 0x30, | |
138 | }, | |
1da177e4 LT |
139 | }; |
140 | ||
bd0b9ac4 | 141 | static void locomo_handler(struct irq_desc *desc) |
1da177e4 | 142 | { |
07f56e66 | 143 | struct locomo *lchip = irq_desc_get_handler_data(desc); |
1da177e4 | 144 | int req, i; |
1da177e4 LT |
145 | |
146 | /* Acknowledge the parent IRQ */ | |
680244df | 147 | desc->irq_data.chip->irq_ack(&desc->irq_data); |
1da177e4 LT |
148 | |
149 | /* check why this interrupt was generated */ | |
ac609d26 | 150 | req = locomo_readl(lchip->base + LOCOMO_ICR) & 0x0f00; |
1da177e4 LT |
151 | |
152 | if (req) { | |
6bf9e97b TG |
153 | unsigned int irq; |
154 | ||
1da177e4 | 155 | /* generate the next interrupt(s) */ |
ac609d26 | 156 | irq = lchip->irq_base; |
d8aa0251 | 157 | for (i = 0; i <= 3; i++, irq++) { |
1da177e4 | 158 | if (req & (0x0100 << i)) { |
d8aa0251 | 159 | generic_handle_irq(irq); |
1da177e4 LT |
160 | } |
161 | ||
162 | } | |
163 | } | |
164 | } | |
165 | ||
680244df | 166 | static void locomo_ack_irq(struct irq_data *d) |
1da177e4 LT |
167 | { |
168 | } | |
169 | ||
680244df | 170 | static void locomo_mask_irq(struct irq_data *d) |
1da177e4 | 171 | { |
680244df | 172 | struct locomo *lchip = irq_data_get_irq_chip_data(d); |
1da177e4 | 173 | unsigned int r; |
ac609d26 | 174 | r = locomo_readl(lchip->base + LOCOMO_ICR); |
680244df | 175 | r &= ~(0x0010 << (d->irq - lchip->irq_base)); |
ac609d26 | 176 | locomo_writel(r, lchip->base + LOCOMO_ICR); |
1da177e4 LT |
177 | } |
178 | ||
680244df | 179 | static void locomo_unmask_irq(struct irq_data *d) |
1da177e4 | 180 | { |
680244df | 181 | struct locomo *lchip = irq_data_get_irq_chip_data(d); |
1da177e4 | 182 | unsigned int r; |
ac609d26 | 183 | r = locomo_readl(lchip->base + LOCOMO_ICR); |
680244df | 184 | r |= (0x0010 << (d->irq - lchip->irq_base)); |
ac609d26 | 185 | locomo_writel(r, lchip->base + LOCOMO_ICR); |
1da177e4 LT |
186 | } |
187 | ||
38c677cb | 188 | static struct irq_chip locomo_chip = { |
680244df LB |
189 | .name = "LOCOMO", |
190 | .irq_ack = locomo_ack_irq, | |
191 | .irq_mask = locomo_mask_irq, | |
192 | .irq_unmask = locomo_unmask_irq, | |
1da177e4 LT |
193 | }; |
194 | ||
1da177e4 LT |
195 | static void locomo_setup_irq(struct locomo *lchip) |
196 | { | |
ac609d26 | 197 | int irq = lchip->irq_base; |
1da177e4 LT |
198 | |
199 | /* | |
200 | * Install handler for IRQ_LOCOMO_HW. | |
201 | */ | |
6845664a | 202 | irq_set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING); |
07f56e66 | 203 | irq_set_chained_handler_and_data(lchip->irq, locomo_handler, lchip); |
1da177e4 | 204 | |
ac609d26 EM |
205 | /* Install handlers for IRQ_LOCOMO_* */ |
206 | for ( ; irq <= lchip->irq_base + 3; irq++) { | |
f38c02f3 | 207 | irq_set_chip_and_handler(irq, &locomo_chip, handle_level_irq); |
9323f261 | 208 | irq_set_chip_data(irq, lchip); |
e8d36d5d | 209 | irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); |
1da177e4 LT |
210 | } |
211 | } | |
212 | ||
213 | ||
214 | static void locomo_dev_release(struct device *_dev) | |
215 | { | |
216 | struct locomo_dev *dev = LOCOMO_DEV(_dev); | |
217 | ||
218 | kfree(dev); | |
219 | } | |
220 | ||
221 | static int | |
222 | locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) | |
223 | { | |
224 | struct locomo_dev *dev; | |
225 | int ret; | |
226 | ||
d2a02b93 | 227 | dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL); |
1da177e4 LT |
228 | if (!dev) { |
229 | ret = -ENOMEM; | |
230 | goto out; | |
231 | } | |
1da177e4 | 232 | |
1da177e4 LT |
233 | /* |
234 | * If the parent device has a DMA mask associated with it, | |
235 | * propagate it down to the children. | |
236 | */ | |
237 | if (lchip->dev->dma_mask) { | |
238 | dev->dma_mask = *lchip->dev->dma_mask; | |
239 | dev->dev.dma_mask = &dev->dma_mask; | |
240 | } | |
241 | ||
3f978704 | 242 | dev_set_name(&dev->dev, "%s", info->name); |
1da177e4 LT |
243 | dev->devid = info->devid; |
244 | dev->dev.parent = lchip->dev; | |
245 | dev->dev.bus = &locomo_bus_type; | |
246 | dev->dev.release = locomo_dev_release; | |
247 | dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask; | |
248 | ||
249 | if (info->offset) | |
250 | dev->mapbase = lchip->base + info->offset; | |
251 | else | |
252 | dev->mapbase = 0; | |
253 | dev->length = info->length; | |
254 | ||
ac609d26 EM |
255 | dev->irq[0] = (lchip->irq_base == NO_IRQ) ? |
256 | NO_IRQ : lchip->irq_base + info->irq[0]; | |
1da177e4 LT |
257 | |
258 | ret = device_register(&dev->dev); | |
259 | if (ret) { | |
260 | out: | |
261 | kfree(dev); | |
262 | } | |
263 | return ret; | |
264 | } | |
265 | ||
b38d950d JL |
266 | #ifdef CONFIG_PM |
267 | ||
268 | struct locomo_save_data { | |
269 | u16 LCM_GPO; | |
270 | u16 LCM_SPICT; | |
271 | u16 LCM_GPE; | |
272 | u16 LCM_ASD; | |
273 | u16 LCM_SPIMD; | |
274 | }; | |
275 | ||
3ae5eaec | 276 | static int locomo_suspend(struct platform_device *dev, pm_message_t state) |
b38d950d | 277 | { |
3ae5eaec | 278 | struct locomo *lchip = platform_get_drvdata(dev); |
b38d950d JL |
279 | struct locomo_save_data *save; |
280 | unsigned long flags; | |
281 | ||
b38d950d JL |
282 | save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL); |
283 | if (!save) | |
284 | return -ENOMEM; | |
285 | ||
93160c63 | 286 | lchip->saved_state = save; |
b38d950d JL |
287 | |
288 | spin_lock_irqsave(&lchip->lock, flags); | |
289 | ||
290 | save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */ | |
291 | locomo_writel(0x00, lchip->base + LOCOMO_GPO); | |
2a52efb2 | 292 | save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */ |
1b0d76cb | 293 | locomo_writel(0x40, lchip->base + LOCOMO_SPI + LOCOMO_SPICT); |
b38d950d JL |
294 | save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */ |
295 | locomo_writel(0x00, lchip->base + LOCOMO_GPE); | |
296 | save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */ | |
297 | locomo_writel(0x00, lchip->base + LOCOMO_ASD); | |
2a52efb2 TK |
298 | save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */ |
299 | locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); | |
b38d950d JL |
300 | |
301 | locomo_writel(0x00, lchip->base + LOCOMO_PAIF); | |
302 | locomo_writel(0x00, lchip->base + LOCOMO_DAC); | |
303 | locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC); | |
304 | ||
2a52efb2 | 305 | if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88)) |
b38d950d JL |
306 | locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */ |
307 | else | |
308 | /* 18MHz already enabled, so no wait */ | |
309 | locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */ | |
310 | ||
311 | locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/ | |
312 | locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */ | |
313 | locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */ | |
314 | ||
315 | spin_unlock_irqrestore(&lchip->lock, flags); | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
3ae5eaec | 320 | static int locomo_resume(struct platform_device *dev) |
b38d950d | 321 | { |
3ae5eaec | 322 | struct locomo *lchip = platform_get_drvdata(dev); |
b38d950d JL |
323 | struct locomo_save_data *save; |
324 | unsigned long r; | |
325 | unsigned long flags; | |
93160c63 RW |
326 | |
327 | save = lchip->saved_state; | |
b38d950d JL |
328 | if (!save) |
329 | return 0; | |
330 | ||
331 | spin_lock_irqsave(&lchip->lock, flags); | |
332 | ||
333 | locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO); | |
2a52efb2 | 334 | locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT); |
b38d950d JL |
335 | locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE); |
336 | locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD); | |
2a52efb2 | 337 | locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); |
b38d950d JL |
338 | |
339 | locomo_writel(0x00, lchip->base + LOCOMO_C32K); | |
340 | locomo_writel(0x90, lchip->base + LOCOMO_TADC); | |
341 | ||
342 | locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC); | |
343 | r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); | |
344 | r &= 0xFEFF; | |
345 | locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); | |
346 | locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD); | |
347 | ||
348 | spin_unlock_irqrestore(&lchip->lock, flags); | |
93160c63 RW |
349 | |
350 | lchip->saved_state = NULL; | |
b38d950d JL |
351 | kfree(save); |
352 | ||
353 | return 0; | |
354 | } | |
355 | #endif | |
356 | ||
4ebf2d00 | 357 | |
1da177e4 LT |
358 | /** |
359 | * locomo_probe - probe for a single LoCoMo chip. | |
360 | * @phys_addr: physical address of device. | |
361 | * | |
362 | * Probe for a LoCoMo chip. This must be called | |
363 | * before any other locomo-specific code. | |
364 | * | |
365 | * Returns: | |
366 | * %-ENODEV device not found. | |
367 | * %-EBUSY physical address already marked in-use. | |
368 | * %0 successful. | |
369 | */ | |
370 | static int | |
371 | __locomo_probe(struct device *me, struct resource *mem, int irq) | |
372 | { | |
ac609d26 | 373 | struct locomo_platform_data *pdata = me->platform_data; |
1da177e4 LT |
374 | struct locomo *lchip; |
375 | unsigned long r; | |
376 | int i, ret = -ENODEV; | |
377 | ||
d2a02b93 | 378 | lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL); |
1da177e4 LT |
379 | if (!lchip) |
380 | return -ENOMEM; | |
381 | ||
1da177e4 LT |
382 | spin_lock_init(&lchip->lock); |
383 | ||
384 | lchip->dev = me; | |
385 | dev_set_drvdata(lchip->dev, lchip); | |
386 | ||
387 | lchip->phys = mem->start; | |
388 | lchip->irq = irq; | |
ac609d26 | 389 | lchip->irq_base = (pdata) ? pdata->irq_base : NO_IRQ; |
1da177e4 LT |
390 | |
391 | /* | |
392 | * Map the whole region. This also maps the | |
393 | * registers for our children. | |
394 | */ | |
395 | lchip->base = ioremap(mem->start, PAGE_SIZE); | |
396 | if (!lchip->base) { | |
397 | ret = -ENOMEM; | |
398 | goto out; | |
399 | } | |
400 | ||
401 | /* locomo initialize */ | |
402 | locomo_writel(0, lchip->base + LOCOMO_ICR); | |
403 | /* KEYBOARD */ | |
404 | locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); | |
405 | ||
406 | /* GPIO */ | |
407 | locomo_writel(0, lchip->base + LOCOMO_GPO); | |
2a52efb2 | 408 | locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) |
1da177e4 | 409 | , lchip->base + LOCOMO_GPE); |
2a52efb2 | 410 | locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) |
1da177e4 LT |
411 | , lchip->base + LOCOMO_GPD); |
412 | locomo_writel(0, lchip->base + LOCOMO_GIE); | |
413 | ||
e4423781 | 414 | /* Frontlight */ |
1da177e4 LT |
415 | locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); |
416 | locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); | |
4ebf2d00 | 417 | |
1da177e4 LT |
418 | /* Longtime timer */ |
419 | locomo_writel(0, lchip->base + LOCOMO_LTINT); | |
420 | /* SPI */ | |
1b0d76cb | 421 | locomo_writel(0, lchip->base + LOCOMO_SPI + LOCOMO_SPIIE); |
1da177e4 LT |
422 | |
423 | locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); | |
424 | r = locomo_readl(lchip->base + LOCOMO_ASD); | |
425 | r |= 0x8000; | |
426 | locomo_writel(r, lchip->base + LOCOMO_ASD); | |
427 | ||
428 | locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); | |
429 | r = locomo_readl(lchip->base + LOCOMO_HSD); | |
430 | r |= 0x8000; | |
431 | locomo_writel(r, lchip->base + LOCOMO_HSD); | |
432 | ||
433 | locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); | |
434 | ||
435 | /* XON */ | |
436 | locomo_writel(0x80, lchip->base + LOCOMO_TADC); | |
437 | udelay(1000); | |
438 | /* CLK9MEN */ | |
439 | r = locomo_readl(lchip->base + LOCOMO_TADC); | |
440 | r |= 0x10; | |
441 | locomo_writel(r, lchip->base + LOCOMO_TADC); | |
442 | udelay(100); | |
443 | ||
444 | /* init DAC */ | |
445 | r = locomo_readl(lchip->base + LOCOMO_DAC); | |
446 | r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; | |
447 | locomo_writel(r, lchip->base + LOCOMO_DAC); | |
448 | ||
449 | r = locomo_readl(lchip->base + LOCOMO_VER); | |
450 | printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); | |
451 | ||
452 | /* | |
453 | * The interrupt controller must be initialised before any | |
454 | * other device to ensure that the interrupts are available. | |
455 | */ | |
ac609d26 | 456 | if (lchip->irq != NO_IRQ && lchip->irq_base != NO_IRQ) |
1da177e4 LT |
457 | locomo_setup_irq(lchip); |
458 | ||
459 | for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) | |
460 | locomo_init_one_child(lchip, &locomo_devices[i]); | |
1da177e4 LT |
461 | return 0; |
462 | ||
463 | out: | |
464 | kfree(lchip); | |
465 | return ret; | |
466 | } | |
467 | ||
e24da5d3 | 468 | static int locomo_remove_child(struct device *dev, void *data) |
1da177e4 | 469 | { |
e24da5d3 PM |
470 | device_unregister(dev); |
471 | return 0; | |
472 | } | |
1da177e4 | 473 | |
e24da5d3 PM |
474 | static void __locomo_remove(struct locomo *lchip) |
475 | { | |
476 | device_for_each_child(lchip->dev, NULL, locomo_remove_child); | |
1da177e4 LT |
477 | |
478 | if (lchip->irq != NO_IRQ) { | |
6d0786ac | 479 | irq_set_chained_handler_and_data(lchip->irq, NULL, NULL); |
1da177e4 LT |
480 | } |
481 | ||
482 | iounmap(lchip->base); | |
483 | kfree(lchip); | |
484 | } | |
485 | ||
3ae5eaec | 486 | static int locomo_probe(struct platform_device *dev) |
1da177e4 | 487 | { |
1da177e4 LT |
488 | struct resource *mem; |
489 | int irq; | |
490 | ||
3ae5eaec | 491 | mem = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1da177e4 LT |
492 | if (!mem) |
493 | return -EINVAL; | |
3ae5eaec | 494 | irq = platform_get_irq(dev, 0); |
48944738 DV |
495 | if (irq < 0) |
496 | return -ENXIO; | |
1da177e4 | 497 | |
3ae5eaec | 498 | return __locomo_probe(&dev->dev, mem, irq); |
1da177e4 LT |
499 | } |
500 | ||
3ae5eaec | 501 | static int locomo_remove(struct platform_device *dev) |
1da177e4 | 502 | { |
c35bf4a5 | 503 | struct locomo *lchip = platform_get_drvdata(dev); |
1da177e4 LT |
504 | |
505 | if (lchip) { | |
506 | __locomo_remove(lchip); | |
3ae5eaec | 507 | platform_set_drvdata(dev, NULL); |
1da177e4 LT |
508 | } |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Not sure if this should be on the system bus or not yet. | |
515 | * We really want some way to register a system device at | |
516 | * the per-machine level, and then have this driver pick | |
517 | * up the registered devices. | |
518 | */ | |
3ae5eaec | 519 | static struct platform_driver locomo_device_driver = { |
1da177e4 LT |
520 | .probe = locomo_probe, |
521 | .remove = locomo_remove, | |
b38d950d JL |
522 | #ifdef CONFIG_PM |
523 | .suspend = locomo_suspend, | |
524 | .resume = locomo_resume, | |
525 | #endif | |
3ae5eaec RK |
526 | .driver = { |
527 | .name = "locomo", | |
528 | }, | |
1da177e4 LT |
529 | }; |
530 | ||
531 | /* | |
532 | * Get the parent device driver (us) structure | |
533 | * from a child function device | |
534 | */ | |
535 | static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) | |
536 | { | |
537 | return (struct locomo *)dev_get_drvdata(ldev->dev.parent); | |
538 | } | |
539 | ||
8d48427e | 540 | void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir) |
1da177e4 | 541 | { |
8d48427e | 542 | struct locomo *lchip = dev_get_drvdata(dev); |
1da177e4 LT |
543 | unsigned long flags; |
544 | unsigned int r; | |
545 | ||
8d48427e RP |
546 | if (!lchip) |
547 | return; | |
548 | ||
1da177e4 LT |
549 | spin_lock_irqsave(&lchip->lock, flags); |
550 | ||
551 | r = locomo_readl(lchip->base + LOCOMO_GPD); | |
2a52efb2 TK |
552 | if (dir) |
553 | r |= bits; | |
554 | else | |
555 | r &= ~bits; | |
1da177e4 LT |
556 | locomo_writel(r, lchip->base + LOCOMO_GPD); |
557 | ||
558 | r = locomo_readl(lchip->base + LOCOMO_GPE); | |
559 | if (dir) | |
560 | r |= bits; | |
561 | else | |
562 | r &= ~bits; | |
563 | locomo_writel(r, lchip->base + LOCOMO_GPE); | |
564 | ||
565 | spin_unlock_irqrestore(&lchip->lock, flags); | |
566 | } | |
9c5e8fec | 567 | EXPORT_SYMBOL(locomo_gpio_set_dir); |
1da177e4 | 568 | |
8d48427e | 569 | int locomo_gpio_read_level(struct device *dev, unsigned int bits) |
1da177e4 | 570 | { |
8d48427e | 571 | struct locomo *lchip = dev_get_drvdata(dev); |
1da177e4 LT |
572 | unsigned long flags; |
573 | unsigned int ret; | |
574 | ||
8d48427e RP |
575 | if (!lchip) |
576 | return -ENODEV; | |
577 | ||
1da177e4 LT |
578 | spin_lock_irqsave(&lchip->lock, flags); |
579 | ret = locomo_readl(lchip->base + LOCOMO_GPL); | |
580 | spin_unlock_irqrestore(&lchip->lock, flags); | |
581 | ||
582 | ret &= bits; | |
583 | return ret; | |
584 | } | |
9c5e8fec | 585 | EXPORT_SYMBOL(locomo_gpio_read_level); |
1da177e4 | 586 | |
8d48427e | 587 | int locomo_gpio_read_output(struct device *dev, unsigned int bits) |
1da177e4 | 588 | { |
8d48427e | 589 | struct locomo *lchip = dev_get_drvdata(dev); |
1da177e4 LT |
590 | unsigned long flags; |
591 | unsigned int ret; | |
592 | ||
8d48427e RP |
593 | if (!lchip) |
594 | return -ENODEV; | |
595 | ||
1da177e4 LT |
596 | spin_lock_irqsave(&lchip->lock, flags); |
597 | ret = locomo_readl(lchip->base + LOCOMO_GPO); | |
598 | spin_unlock_irqrestore(&lchip->lock, flags); | |
599 | ||
600 | ret &= bits; | |
601 | return ret; | |
602 | } | |
9c5e8fec | 603 | EXPORT_SYMBOL(locomo_gpio_read_output); |
1da177e4 | 604 | |
8d48427e | 605 | void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set) |
1da177e4 | 606 | { |
8d48427e | 607 | struct locomo *lchip = dev_get_drvdata(dev); |
1da177e4 LT |
608 | unsigned long flags; |
609 | unsigned int r; | |
610 | ||
8d48427e RP |
611 | if (!lchip) |
612 | return; | |
613 | ||
1da177e4 LT |
614 | spin_lock_irqsave(&lchip->lock, flags); |
615 | ||
616 | r = locomo_readl(lchip->base + LOCOMO_GPO); | |
617 | if (set) | |
618 | r |= bits; | |
619 | else | |
620 | r &= ~bits; | |
621 | locomo_writel(r, lchip->base + LOCOMO_GPO); | |
622 | ||
623 | spin_unlock_irqrestore(&lchip->lock, flags); | |
624 | } | |
9c5e8fec | 625 | EXPORT_SYMBOL(locomo_gpio_write); |
1da177e4 LT |
626 | |
627 | static void locomo_m62332_sendbit(void *mapbase, int bit) | |
628 | { | |
629 | unsigned int r; | |
630 | ||
631 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
632 | r &= ~(LOCOMO_DAC_SCLOEB); | |
633 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
634 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
635 | udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ | |
636 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
637 | r &= ~(LOCOMO_DAC_SCLOEB); | |
638 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
639 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
640 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
641 | ||
642 | if (bit & 1) { | |
643 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
644 | r |= LOCOMO_DAC_SDAOEB; | |
645 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
646 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
647 | } else { | |
648 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
649 | r &= ~(LOCOMO_DAC_SDAOEB); | |
650 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
651 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
652 | } | |
653 | ||
654 | udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */ | |
655 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
656 | r |= LOCOMO_DAC_SCLOEB; | |
657 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
658 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
659 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ | |
660 | } | |
661 | ||
662 | void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) | |
663 | { | |
664 | struct locomo *lchip = locomo_chip_driver(ldev); | |
665 | int i; | |
666 | unsigned char data; | |
667 | unsigned int r; | |
668 | void *mapbase = lchip->base; | |
669 | unsigned long flags; | |
670 | ||
671 | spin_lock_irqsave(&lchip->lock, flags); | |
672 | ||
673 | /* Start */ | |
674 | udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ | |
675 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
676 | r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; | |
677 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
678 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
679 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ | |
680 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
681 | r &= ~(LOCOMO_DAC_SDAOEB); | |
682 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
683 | udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ | |
684 | udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ | |
685 | ||
686 | /* Send slave address and W bit (LSB is W bit) */ | |
687 | data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; | |
688 | for (i = 1; i <= 8; i++) { | |
689 | locomo_m62332_sendbit(mapbase, data >> (8 - i)); | |
690 | } | |
691 | ||
692 | /* Check A bit */ | |
693 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
694 | r &= ~(LOCOMO_DAC_SCLOEB); | |
695 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
696 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
697 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
698 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
699 | r &= ~(LOCOMO_DAC_SDAOEB); | |
700 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
701 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
702 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
703 | r |= LOCOMO_DAC_SCLOEB; | |
704 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
705 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
706 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ | |
707 | if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ | |
708 | printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); | |
c8c3dcb9 | 709 | goto out; |
1da177e4 LT |
710 | } |
711 | ||
712 | /* Send Sub address (LSB is channel select) */ | |
713 | /* channel = 0 : ch1 select */ | |
714 | /* = 1 : ch2 select */ | |
715 | data = M62332_SUB_ADDR + channel; | |
716 | for (i = 1; i <= 8; i++) { | |
717 | locomo_m62332_sendbit(mapbase, data >> (8 - i)); | |
718 | } | |
719 | ||
720 | /* Check A bit */ | |
721 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
722 | r &= ~(LOCOMO_DAC_SCLOEB); | |
723 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
724 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
725 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
726 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
727 | r &= ~(LOCOMO_DAC_SDAOEB); | |
728 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
729 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
730 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
731 | r |= LOCOMO_DAC_SCLOEB; | |
732 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
733 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
734 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ | |
735 | if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ | |
736 | printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); | |
c8c3dcb9 | 737 | goto out; |
1da177e4 LT |
738 | } |
739 | ||
740 | /* Send DAC data */ | |
741 | for (i = 1; i <= 8; i++) { | |
742 | locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); | |
743 | } | |
744 | ||
745 | /* Check A bit */ | |
746 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
747 | r &= ~(LOCOMO_DAC_SCLOEB); | |
748 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
749 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
750 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
751 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
752 | r &= ~(LOCOMO_DAC_SDAOEB); | |
753 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
754 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
755 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
756 | r |= LOCOMO_DAC_SCLOEB; | |
757 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
758 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
759 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ | |
760 | if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ | |
761 | printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); | |
1da177e4 LT |
762 | } |
763 | ||
c8c3dcb9 | 764 | out: |
1da177e4 LT |
765 | /* stop */ |
766 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
767 | r &= ~(LOCOMO_DAC_SCLOEB); | |
768 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
769 | udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ | |
770 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
771 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
772 | r |= LOCOMO_DAC_SCLOEB; | |
773 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
774 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
775 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ | |
776 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
777 | r |= LOCOMO_DAC_SDAOEB; | |
778 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
779 | udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ | |
780 | udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ | |
781 | ||
782 | r = locomo_readl(mapbase + LOCOMO_DAC); | |
783 | r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; | |
784 | locomo_writel(r, mapbase + LOCOMO_DAC); | |
785 | udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ | |
786 | udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ | |
787 | ||
788 | spin_unlock_irqrestore(&lchip->lock, flags); | |
789 | } | |
9c5e8fec | 790 | EXPORT_SYMBOL(locomo_m62332_senddata); |
1da177e4 | 791 | |
e4423781 RP |
792 | /* |
793 | * Frontlight control | |
794 | */ | |
795 | ||
e4423781 RP |
796 | void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf) |
797 | { | |
798 | unsigned long flags; | |
799 | struct locomo *lchip = locomo_chip_driver(dev); | |
800 | ||
801 | if (vr) | |
8d48427e | 802 | locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1); |
e4423781 | 803 | else |
8d48427e | 804 | locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0); |
e4423781 RP |
805 | |
806 | spin_lock_irqsave(&lchip->lock, flags); | |
807 | locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); | |
808 | udelay(100); | |
809 | locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); | |
810 | locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); | |
811 | spin_unlock_irqrestore(&lchip->lock, flags); | |
812 | } | |
9179825c | 813 | EXPORT_SYMBOL(locomo_frontlight_set); |
e4423781 | 814 | |
1da177e4 LT |
815 | /* |
816 | * LoCoMo "Register Access Bus." | |
817 | * | |
818 | * We model this as a regular bus type, and hang devices directly | |
819 | * off this. | |
820 | */ | |
821 | static int locomo_match(struct device *_dev, struct device_driver *_drv) | |
822 | { | |
823 | struct locomo_dev *dev = LOCOMO_DEV(_dev); | |
824 | struct locomo_driver *drv = LOCOMO_DRV(_drv); | |
825 | ||
826 | return dev->devid == drv->devid; | |
827 | } | |
828 | ||
829 | static int locomo_bus_suspend(struct device *dev, pm_message_t state) | |
830 | { | |
831 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
832 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
833 | int ret = 0; | |
834 | ||
835 | if (drv && drv->suspend) | |
836 | ret = drv->suspend(ldev, state); | |
837 | return ret; | |
838 | } | |
839 | ||
840 | static int locomo_bus_resume(struct device *dev) | |
841 | { | |
842 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
843 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
844 | int ret = 0; | |
845 | ||
846 | if (drv && drv->resume) | |
847 | ret = drv->resume(ldev); | |
848 | return ret; | |
849 | } | |
850 | ||
851 | static int locomo_bus_probe(struct device *dev) | |
852 | { | |
853 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
854 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
855 | int ret = -ENODEV; | |
856 | ||
857 | if (drv->probe) | |
858 | ret = drv->probe(ldev); | |
859 | return ret; | |
860 | } | |
861 | ||
862 | static int locomo_bus_remove(struct device *dev) | |
863 | { | |
864 | struct locomo_dev *ldev = LOCOMO_DEV(dev); | |
865 | struct locomo_driver *drv = LOCOMO_DRV(dev->driver); | |
866 | int ret = 0; | |
867 | ||
868 | if (drv->remove) | |
869 | ret = drv->remove(ldev); | |
870 | return ret; | |
871 | } | |
872 | ||
873 | struct bus_type locomo_bus_type = { | |
874 | .name = "locomo-bus", | |
875 | .match = locomo_match, | |
306955be RK |
876 | .probe = locomo_bus_probe, |
877 | .remove = locomo_bus_remove, | |
1da177e4 LT |
878 | .suspend = locomo_bus_suspend, |
879 | .resume = locomo_bus_resume, | |
880 | }; | |
881 | ||
882 | int locomo_driver_register(struct locomo_driver *driver) | |
883 | { | |
1da177e4 LT |
884 | driver->drv.bus = &locomo_bus_type; |
885 | return driver_register(&driver->drv); | |
886 | } | |
9c5e8fec | 887 | EXPORT_SYMBOL(locomo_driver_register); |
1da177e4 LT |
888 | |
889 | void locomo_driver_unregister(struct locomo_driver *driver) | |
890 | { | |
891 | driver_unregister(&driver->drv); | |
892 | } | |
9c5e8fec | 893 | EXPORT_SYMBOL(locomo_driver_unregister); |
1da177e4 LT |
894 | |
895 | static int __init locomo_init(void) | |
896 | { | |
897 | int ret = bus_register(&locomo_bus_type); | |
898 | if (ret == 0) | |
3ae5eaec | 899 | platform_driver_register(&locomo_device_driver); |
1da177e4 LT |
900 | return ret; |
901 | } | |
902 | ||
903 | static void __exit locomo_exit(void) | |
904 | { | |
3ae5eaec | 905 | platform_driver_unregister(&locomo_device_driver); |
1da177e4 LT |
906 | bus_unregister(&locomo_bus_type); |
907 | } | |
908 | ||
909 | module_init(locomo_init); | |
910 | module_exit(locomo_exit); | |
911 | ||
912 | MODULE_DESCRIPTION("Sharp LoCoMo core driver"); | |
913 | MODULE_LICENSE("GPL"); | |
914 | MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); |