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