2 * linux/arch/arm/common/locomo.c
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.
10 * This file contains all generic LoCoMo support.
12 * All initialization functions provided here are intended to be called
13 * from machine specific code with proper arguments when required.
18 #include <linux/config.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/delay.h>
23 #include <linux/errno.h>
24 #include <linux/ioport.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/spinlock.h>
29 #include <asm/hardware.h>
32 #include <asm/mach/irq.h>
34 #include <asm/hardware/locomo.h>
36 /* M62332 output channel selection */
37 #define M62332_EVR_CH 1 /* M62332 volume channel number */
38 /* 0 : CH.1 , 1 : CH. 2 */
40 #define M62332_SLAVE_ADDR 0x4e /* Slave address */
41 #define M62332_W_BIT 0x00 /* W bit (0 only) */
42 #define M62332_SUB_ADDR 0x00 /* Sub address */
43 #define M62332_A_BIT 0x00 /* A bit (0 only) */
45 /* DAC setup and hold times (expressed in us) */
46 #define DAC_BUS_FREE_TIME 5 /* 4.7 us */
47 #define DAC_START_SETUP_TIME 5 /* 4.7 us */
48 #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
49 #define DAC_START_HOLD_TIME 5 /* 4.7 us */
50 #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
51 #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
52 #define DAC_DATA_SETUP_TIME 1 /* 250 ns */
53 #define DAC_DATA_HOLD_TIME 1 /* 300 ns */
54 #define DAC_LOW_SETUP_TIME 1 /* 300 ns */
55 #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
57 /* the following is the overall data for the locomo chip */
66 struct locomo_dev_info
{
74 /* All the locomo devices. If offset is non-zero, the mapbase for the
75 * locomo_dev will be set to the chip base plus offset. If offset is
76 * zero, then the mapbase for the locomo_dev will be set to zero. An
77 * offset of zero means the device only uses GPIOs or other helper
78 * functions inside this file */
79 static struct locomo_dev_info locomo_devices
[] = {
81 .devid
= LOCOMO_DEVID_KEYBOARD
,
85 .name
= "locomo-keyboard",
86 .offset
= LOCOMO_KEYBOARD
,
90 .devid
= LOCOMO_DEVID_FRONTLIGHT
,
92 .name
= "locomo-frontlight",
93 .offset
= LOCOMO_FRONTLIGHT
,
98 .devid
= LOCOMO_DEVID_BACKLIGHT
,
100 .name
= "locomo-backlight",
101 .offset
= LOCOMO_BACKLIGHT
,
105 .devid
= LOCOMO_DEVID_AUDIO
,
107 .name
= "locomo-audio",
108 .offset
= LOCOMO_AUDIO
,
112 .devid
= LOCOMO_DEVID_LED
,
114 .name
= "locomo-led",
115 .offset
= LOCOMO_LED
,
119 .devid
= LOCOMO_DEVID_UART
,
121 .name
= "locomo-uart",
128 /** LoCoMo interrupt handling stuff.
129 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
130 * that is, there is only one real hardware interrupt
131 * we determine which interrupt it is by reading some IO memory.
132 * We have two levels of expansion, first in the handler for the
133 * hardware interrupt we generate an interrupt
134 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
136 * hardware irq reads LOCOMO_ICR & 0x0f00
137 * IRQ_LOCOMO_KEY_BASE
138 * IRQ_LOCOMO_GPIO_BASE
140 * IRQ_LOCOMO_SPI_BASE
141 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
143 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
144 * IRQ_LOCOMO_GPIO[0-15]
145 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
147 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
150 * IRQ_LOCOMO_SPI_OVRN
151 * IRQ_LOCOMO_SPI_TEND
154 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
155 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
156 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
157 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
158 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
160 static void locomo_handler(unsigned int irq
, struct irqdesc
*desc
,
161 struct pt_regs
*regs
)
165 void __iomem
*mapbase
= get_irq_chipdata(irq
);
167 /* Acknowledge the parent IRQ */
168 desc
->chip
->ack(irq
);
170 /* check why this interrupt was generated */
171 req
= locomo_readl(mapbase
+ LOCOMO_ICR
) & 0x0f00;
174 /* generate the next interrupt(s) */
175 irq
= LOCOMO_IRQ_START
;
177 for (i
= 0; i
<= 3; i
++, d
++, irq
++) {
178 if (req
& (0x0100 << i
)) {
179 desc_handle_irq(irq
, d
, regs
);
186 static void locomo_ack_irq(unsigned int irq
)
190 static void locomo_mask_irq(unsigned int irq
)
192 void __iomem
*mapbase
= get_irq_chipdata(irq
);
194 r
= locomo_readl(mapbase
+ LOCOMO_ICR
);
195 r
&= ~(0x0010 << (irq
- LOCOMO_IRQ_START
));
196 locomo_writel(r
, mapbase
+ LOCOMO_ICR
);
199 static void locomo_unmask_irq(unsigned int irq
)
201 void __iomem
*mapbase
= get_irq_chipdata(irq
);
203 r
= locomo_readl(mapbase
+ LOCOMO_ICR
);
204 r
|= (0x0010 << (irq
- LOCOMO_IRQ_START
));
205 locomo_writel(r
, mapbase
+ LOCOMO_ICR
);
208 static struct irqchip locomo_chip
= {
209 .ack
= locomo_ack_irq
,
210 .mask
= locomo_mask_irq
,
211 .unmask
= locomo_unmask_irq
,
214 static void locomo_key_handler(unsigned int irq
, struct irqdesc
*desc
,
215 struct pt_regs
*regs
)
218 void __iomem
*mapbase
= get_irq_chipdata(irq
);
220 if (locomo_readl(mapbase
+ LOCOMO_KEYBOARD
+ LOCOMO_KIC
) & 0x0001) {
221 d
= irq_desc
+ LOCOMO_IRQ_KEY_START
;
222 desc_handle_irq(LOCOMO_IRQ_KEY_START
, d
, regs
);
226 static void locomo_key_ack_irq(unsigned int irq
)
228 void __iomem
*mapbase
= get_irq_chipdata(irq
);
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
);
235 static void locomo_key_mask_irq(unsigned int irq
)
237 void __iomem
*mapbase
= get_irq_chipdata(irq
);
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
);
244 static void locomo_key_unmask_irq(unsigned int irq
)
246 void __iomem
*mapbase
= get_irq_chipdata(irq
);
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
);
253 static struct irqchip locomo_key_chip
= {
254 .ack
= locomo_key_ack_irq
,
255 .mask
= locomo_key_mask_irq
,
256 .unmask
= locomo_key_unmask_irq
,
259 static void locomo_gpio_handler(unsigned int irq
, struct irqdesc
*desc
,
260 struct pt_regs
*regs
)
264 void __iomem
*mapbase
= get_irq_chipdata(irq
);
266 req
= locomo_readl(mapbase
+ LOCOMO_GIR
) &
267 locomo_readl(mapbase
+ LOCOMO_GPD
) &
271 irq
= LOCOMO_IRQ_GPIO_START
;
272 d
= irq_desc
+ LOCOMO_IRQ_GPIO_START
;
273 for (i
= 0; i
<= 15; i
++, irq
++, d
++) {
274 if (req
& (0x0001 << i
)) {
275 desc_handle_irq(irq
, d
, regs
);
281 static void locomo_gpio_ack_irq(unsigned int irq
)
283 void __iomem
*mapbase
= get_irq_chipdata(irq
);
285 r
= locomo_readl(mapbase
+ LOCOMO_GWE
);
286 r
|= (0x0001 << (irq
- LOCOMO_IRQ_GPIO_START
));
287 locomo_writel(r
, mapbase
+ LOCOMO_GWE
);
289 r
= locomo_readl(mapbase
+ LOCOMO_GIS
);
290 r
&= ~(0x0001 << (irq
- LOCOMO_IRQ_GPIO_START
));
291 locomo_writel(r
, mapbase
+ LOCOMO_GIS
);
293 r
= locomo_readl(mapbase
+ LOCOMO_GWE
);
294 r
&= ~(0x0001 << (irq
- LOCOMO_IRQ_GPIO_START
));
295 locomo_writel(r
, mapbase
+ LOCOMO_GWE
);
298 static void locomo_gpio_mask_irq(unsigned int irq
)
300 void __iomem
*mapbase
= get_irq_chipdata(irq
);
302 r
= locomo_readl(mapbase
+ LOCOMO_GIE
);
303 r
&= ~(0x0001 << (irq
- LOCOMO_IRQ_GPIO_START
));
304 locomo_writel(r
, mapbase
+ LOCOMO_GIE
);
307 static void locomo_gpio_unmask_irq(unsigned int irq
)
309 void __iomem
*mapbase
= get_irq_chipdata(irq
);
311 r
= locomo_readl(mapbase
+ LOCOMO_GIE
);
312 r
|= (0x0001 << (irq
- LOCOMO_IRQ_GPIO_START
));
313 locomo_writel(r
, mapbase
+ LOCOMO_GIE
);
316 static struct irqchip locomo_gpio_chip
= {
317 .ack
= locomo_gpio_ack_irq
,
318 .mask
= locomo_gpio_mask_irq
,
319 .unmask
= locomo_gpio_unmask_irq
,
322 static void locomo_lt_handler(unsigned int irq
, struct irqdesc
*desc
,
323 struct pt_regs
*regs
)
326 void __iomem
*mapbase
= get_irq_chipdata(irq
);
328 if (locomo_readl(mapbase
+ LOCOMO_LTINT
) & 0x0001) {
329 d
= irq_desc
+ LOCOMO_IRQ_LT_START
;
330 desc_handle_irq(LOCOMO_IRQ_LT_START
, d
, regs
);
334 static void locomo_lt_ack_irq(unsigned int irq
)
336 void __iomem
*mapbase
= get_irq_chipdata(irq
);
338 r
= locomo_readl(mapbase
+ LOCOMO_LTINT
);
339 r
&= ~(0x0100 << (irq
- LOCOMO_IRQ_LT_START
));
340 locomo_writel(r
, mapbase
+ LOCOMO_LTINT
);
343 static void locomo_lt_mask_irq(unsigned int irq
)
345 void __iomem
*mapbase
= get_irq_chipdata(irq
);
347 r
= locomo_readl(mapbase
+ LOCOMO_LTINT
);
348 r
&= ~(0x0010 << (irq
- LOCOMO_IRQ_LT_START
));
349 locomo_writel(r
, mapbase
+ LOCOMO_LTINT
);
352 static void locomo_lt_unmask_irq(unsigned int irq
)
354 void __iomem
*mapbase
= get_irq_chipdata(irq
);
356 r
= locomo_readl(mapbase
+ LOCOMO_LTINT
);
357 r
|= (0x0010 << (irq
- LOCOMO_IRQ_LT_START
));
358 locomo_writel(r
, mapbase
+ LOCOMO_LTINT
);
361 static struct irqchip locomo_lt_chip
= {
362 .ack
= locomo_lt_ack_irq
,
363 .mask
= locomo_lt_mask_irq
,
364 .unmask
= locomo_lt_unmask_irq
,
367 static void locomo_spi_handler(unsigned int irq
, struct irqdesc
*desc
,
368 struct pt_regs
*regs
)
372 void __iomem
*mapbase
= get_irq_chipdata(irq
);
374 req
= locomo_readl(mapbase
+ LOCOMO_SPIIR
) & 0x000F;
376 irq
= LOCOMO_IRQ_SPI_START
;
379 for (i
= 0; i
<= 3; i
++, irq
++, d
++) {
380 if (req
& (0x0001 << i
)) {
381 desc_handle_irq(irq
, d
, regs
);
387 static void locomo_spi_ack_irq(unsigned int irq
)
389 void __iomem
*mapbase
= get_irq_chipdata(irq
);
391 r
= locomo_readl(mapbase
+ LOCOMO_SPIWE
);
392 r
|= (0x0001 << (irq
- LOCOMO_IRQ_SPI_START
));
393 locomo_writel(r
, mapbase
+ LOCOMO_SPIWE
);
395 r
= locomo_readl(mapbase
+ LOCOMO_SPIIS
);
396 r
&= ~(0x0001 << (irq
- LOCOMO_IRQ_SPI_START
));
397 locomo_writel(r
, mapbase
+ LOCOMO_SPIIS
);
399 r
= locomo_readl(mapbase
+ LOCOMO_SPIWE
);
400 r
&= ~(0x0001 << (irq
- LOCOMO_IRQ_SPI_START
));
401 locomo_writel(r
, mapbase
+ LOCOMO_SPIWE
);
404 static void locomo_spi_mask_irq(unsigned int irq
)
406 void __iomem
*mapbase
= get_irq_chipdata(irq
);
408 r
= locomo_readl(mapbase
+ LOCOMO_SPIIE
);
409 r
&= ~(0x0001 << (irq
- LOCOMO_IRQ_SPI_START
));
410 locomo_writel(r
, mapbase
+ LOCOMO_SPIIE
);
413 static void locomo_spi_unmask_irq(unsigned int irq
)
415 void __iomem
*mapbase
= get_irq_chipdata(irq
);
417 r
= locomo_readl(mapbase
+ LOCOMO_SPIIE
);
418 r
|= (0x0001 << (irq
- LOCOMO_IRQ_SPI_START
));
419 locomo_writel(r
, mapbase
+ LOCOMO_SPIIE
);
422 static struct irqchip locomo_spi_chip
= {
423 .ack
= locomo_spi_ack_irq
,
424 .mask
= locomo_spi_mask_irq
,
425 .unmask
= locomo_spi_unmask_irq
,
428 static void locomo_setup_irq(struct locomo
*lchip
)
431 void __iomem
*irqbase
= lchip
->base
;
434 * Install handler for IRQ_LOCOMO_HW.
436 set_irq_type(lchip
->irq
, IRQT_FALLING
);
437 set_irq_chipdata(lchip
->irq
, irqbase
);
438 set_irq_chained_handler(lchip
->irq
, locomo_handler
);
440 /* Install handlers for IRQ_LOCOMO_*_BASE */
441 set_irq_chip(IRQ_LOCOMO_KEY_BASE
, &locomo_chip
);
442 set_irq_chipdata(IRQ_LOCOMO_KEY_BASE
, irqbase
);
443 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE
, locomo_key_handler
);
444 set_irq_flags(IRQ_LOCOMO_KEY_BASE
, IRQF_VALID
| IRQF_PROBE
);
446 set_irq_chip(IRQ_LOCOMO_GPIO_BASE
, &locomo_chip
);
447 set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE
, irqbase
);
448 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE
, locomo_gpio_handler
);
449 set_irq_flags(IRQ_LOCOMO_GPIO_BASE
, IRQF_VALID
| IRQF_PROBE
);
451 set_irq_chip(IRQ_LOCOMO_LT_BASE
, &locomo_chip
);
452 set_irq_chipdata(IRQ_LOCOMO_LT_BASE
, irqbase
);
453 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE
, locomo_lt_handler
);
454 set_irq_flags(IRQ_LOCOMO_LT_BASE
, IRQF_VALID
| IRQF_PROBE
);
456 set_irq_chip(IRQ_LOCOMO_SPI_BASE
, &locomo_chip
);
457 set_irq_chipdata(IRQ_LOCOMO_SPI_BASE
, irqbase
);
458 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE
, locomo_spi_handler
);
459 set_irq_flags(IRQ_LOCOMO_SPI_BASE
, IRQF_VALID
| IRQF_PROBE
);
461 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
462 set_irq_chip(LOCOMO_IRQ_KEY_START
, &locomo_key_chip
);
463 set_irq_chipdata(LOCOMO_IRQ_KEY_START
, irqbase
);
464 set_irq_handler(LOCOMO_IRQ_KEY_START
, do_edge_IRQ
);
465 set_irq_flags(LOCOMO_IRQ_KEY_START
, IRQF_VALID
| IRQF_PROBE
);
467 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
468 for (irq
= LOCOMO_IRQ_GPIO_START
; irq
< LOCOMO_IRQ_GPIO_START
+ 16; irq
++) {
469 set_irq_chip(irq
, &locomo_gpio_chip
);
470 set_irq_chipdata(irq
, irqbase
);
471 set_irq_handler(irq
, do_edge_IRQ
);
472 set_irq_flags(irq
, IRQF_VALID
| IRQF_PROBE
);
475 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
476 set_irq_chip(LOCOMO_IRQ_LT_START
, &locomo_lt_chip
);
477 set_irq_chipdata(LOCOMO_IRQ_LT_START
, irqbase
);
478 set_irq_handler(LOCOMO_IRQ_LT_START
, do_edge_IRQ
);
479 set_irq_flags(LOCOMO_IRQ_LT_START
, IRQF_VALID
| IRQF_PROBE
);
481 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
482 for (irq
= LOCOMO_IRQ_SPI_START
; irq
< LOCOMO_IRQ_SPI_START
+ 3; irq
++) {
483 set_irq_chip(irq
, &locomo_spi_chip
);
484 set_irq_chipdata(irq
, irqbase
);
485 set_irq_handler(irq
, do_edge_IRQ
);
486 set_irq_flags(irq
, IRQF_VALID
| IRQF_PROBE
);
491 static void locomo_dev_release(struct device
*_dev
)
493 struct locomo_dev
*dev
= LOCOMO_DEV(_dev
);
499 locomo_init_one_child(struct locomo
*lchip
, struct locomo_dev_info
*info
)
501 struct locomo_dev
*dev
;
504 dev
= kzalloc(sizeof(struct locomo_dev
), GFP_KERNEL
);
510 strncpy(dev
->dev
.bus_id
,info
->name
,sizeof(dev
->dev
.bus_id
));
512 * If the parent device has a DMA mask associated with it,
513 * propagate it down to the children.
515 if (lchip
->dev
->dma_mask
) {
516 dev
->dma_mask
= *lchip
->dev
->dma_mask
;
517 dev
->dev
.dma_mask
= &dev
->dma_mask
;
520 dev
->devid
= info
->devid
;
521 dev
->dev
.parent
= lchip
->dev
;
522 dev
->dev
.bus
= &locomo_bus_type
;
523 dev
->dev
.release
= locomo_dev_release
;
524 dev
->dev
.coherent_dma_mask
= lchip
->dev
->coherent_dma_mask
;
527 dev
->mapbase
= lchip
->base
+ info
->offset
;
530 dev
->length
= info
->length
;
532 memmove(dev
->irq
, info
->irq
, sizeof(dev
->irq
));
534 ret
= device_register(&dev
->dev
);
544 struct locomo_save_data
{
552 static int locomo_suspend(struct platform_device
*dev
, pm_message_t state
)
554 struct locomo
*lchip
= platform_get_drvdata(dev
);
555 struct locomo_save_data
*save
;
558 save
= kmalloc(sizeof(struct locomo_save_data
), GFP_KERNEL
);
562 dev
->dev
.power
.saved_state
= (void *) save
;
564 spin_lock_irqsave(&lchip
->lock
, flags
);
566 save
->LCM_GPO
= locomo_readl(lchip
->base
+ LOCOMO_GPO
); /* GPIO */
567 locomo_writel(0x00, lchip
->base
+ LOCOMO_GPO
);
568 save
->LCM_SPICT
= locomo_readl(lchip
->base
+ LOCOMO_SPICT
); /* SPI */
569 locomo_writel(0x40, lchip
->base
+ LOCOMO_SPICT
);
570 save
->LCM_GPE
= locomo_readl(lchip
->base
+ LOCOMO_GPE
); /* GPIO */
571 locomo_writel(0x00, lchip
->base
+ LOCOMO_GPE
);
572 save
->LCM_ASD
= locomo_readl(lchip
->base
+ LOCOMO_ASD
); /* ADSTART */
573 locomo_writel(0x00, lchip
->base
+ LOCOMO_ASD
);
574 save
->LCM_SPIMD
= locomo_readl(lchip
->base
+ LOCOMO_SPIMD
); /* SPI */
575 locomo_writel(0x3C14, lchip
->base
+ LOCOMO_SPIMD
);
577 locomo_writel(0x00, lchip
->base
+ LOCOMO_PAIF
);
578 locomo_writel(0x00, lchip
->base
+ LOCOMO_DAC
);
579 locomo_writel(0x00, lchip
->base
+ LOCOMO_BACKLIGHT
+ LOCOMO_TC
);
581 if ( (locomo_readl(lchip
->base
+ LOCOMO_LED
+ LOCOMO_LPT0
) & 0x88) && (locomo_readl(lchip
->base
+ LOCOMO_LED
+ LOCOMO_LPT1
) & 0x88) )
582 locomo_writel(0x00, lchip
->base
+ LOCOMO_C32K
); /* CLK32 off */
584 /* 18MHz already enabled, so no wait */
585 locomo_writel(0xc1, lchip
->base
+ LOCOMO_C32K
); /* CLK32 on */
587 locomo_writel(0x00, lchip
->base
+ LOCOMO_TADC
); /* 18MHz clock off*/
588 locomo_writel(0x00, lchip
->base
+ LOCOMO_AUDIO
+ LOCOMO_ACC
); /* 22MHz/24MHz clock off */
589 locomo_writel(0x00, lchip
->base
+ LOCOMO_FRONTLIGHT
+ LOCOMO_ALS
); /* FL */
591 spin_unlock_irqrestore(&lchip
->lock
, flags
);
596 static int locomo_resume(struct platform_device
*dev
)
598 struct locomo
*lchip
= platform_get_drvdata(dev
);
599 struct locomo_save_data
*save
;
603 save
= (struct locomo_save_data
*) dev
->dev
.power
.saved_state
;
607 spin_lock_irqsave(&lchip
->lock
, flags
);
609 locomo_writel(save
->LCM_GPO
, lchip
->base
+ LOCOMO_GPO
);
610 locomo_writel(save
->LCM_SPICT
, lchip
->base
+ LOCOMO_SPICT
);
611 locomo_writel(save
->LCM_GPE
, lchip
->base
+ LOCOMO_GPE
);
612 locomo_writel(save
->LCM_ASD
, lchip
->base
+ LOCOMO_ASD
);
613 locomo_writel(save
->LCM_SPIMD
, lchip
->base
+ LOCOMO_SPIMD
);
615 locomo_writel(0x00, lchip
->base
+ LOCOMO_C32K
);
616 locomo_writel(0x90, lchip
->base
+ LOCOMO_TADC
);
618 locomo_writel(0, lchip
->base
+ LOCOMO_KEYBOARD
+ LOCOMO_KSC
);
619 r
= locomo_readl(lchip
->base
+ LOCOMO_KEYBOARD
+ LOCOMO_KIC
);
621 locomo_writel(r
, lchip
->base
+ LOCOMO_KEYBOARD
+ LOCOMO_KIC
);
622 locomo_writel(0x1, lchip
->base
+ LOCOMO_KEYBOARD
+ LOCOMO_KCMD
);
624 spin_unlock_irqrestore(&lchip
->lock
, flags
);
632 #define LCM_ALC_EN 0x8000
634 void frontlight_set(struct locomo
*lchip
, int duty
, int vr
, int bpwf
)
638 spin_lock_irqsave(&lchip
->lock
, flags
);
639 locomo_writel(bpwf
, lchip
->base
+ LOCOMO_FRONTLIGHT
+ LOCOMO_ALS
);
641 locomo_writel(duty
, lchip
->base
+ LOCOMO_FRONTLIGHT
+ LOCOMO_ALD
);
642 locomo_writel(bpwf
| LCM_ALC_EN
, lchip
->base
+ LOCOMO_FRONTLIGHT
+ LOCOMO_ALS
);
643 spin_unlock_irqrestore(&lchip
->lock
, flags
);
648 * locomo_probe - probe for a single LoCoMo chip.
649 * @phys_addr: physical address of device.
651 * Probe for a LoCoMo chip. This must be called
652 * before any other locomo-specific code.
655 * %-ENODEV device not found.
656 * %-EBUSY physical address already marked in-use.
660 __locomo_probe(struct device
*me
, struct resource
*mem
, int irq
)
662 struct locomo
*lchip
;
664 int i
, ret
= -ENODEV
;
666 lchip
= kzalloc(sizeof(struct locomo
), GFP_KERNEL
);
670 spin_lock_init(&lchip
->lock
);
673 dev_set_drvdata(lchip
->dev
, lchip
);
675 lchip
->phys
= mem
->start
;
679 * Map the whole region. This also maps the
680 * registers for our children.
682 lchip
->base
= ioremap(mem
->start
, PAGE_SIZE
);
688 /* locomo initialize */
689 locomo_writel(0, lchip
->base
+ LOCOMO_ICR
);
691 locomo_writel(0, lchip
->base
+ LOCOMO_KEYBOARD
+ LOCOMO_KIC
);
694 locomo_writel(0, lchip
->base
+ LOCOMO_GPO
);
695 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
696 , lchip
->base
+ LOCOMO_GPE
);
697 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
698 , lchip
->base
+ LOCOMO_GPD
);
699 locomo_writel(0, lchip
->base
+ LOCOMO_GIE
);
702 locomo_writel(0, lchip
->base
+ LOCOMO_FRONTLIGHT
+ LOCOMO_ALS
);
703 locomo_writel(0, lchip
->base
+ LOCOMO_FRONTLIGHT
+ LOCOMO_ALD
);
705 /* Same constants can be used for collie and poodle
706 (depending on CONFIG options in original sharp code)? */
707 frontlight_set(lchip
, 163, 0, 148);
710 locomo_writel(0, lchip
->base
+ LOCOMO_LTINT
);
712 locomo_writel(0, lchip
->base
+ LOCOMO_SPIIE
);
714 locomo_writel(6 + 8 + 320 + 30 - 10, lchip
->base
+ LOCOMO_ASD
);
715 r
= locomo_readl(lchip
->base
+ LOCOMO_ASD
);
717 locomo_writel(r
, lchip
->base
+ LOCOMO_ASD
);
719 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip
->base
+ LOCOMO_HSD
);
720 r
= locomo_readl(lchip
->base
+ LOCOMO_HSD
);
722 locomo_writel(r
, lchip
->base
+ LOCOMO_HSD
);
724 locomo_writel(128 / 8, lchip
->base
+ LOCOMO_HSC
);
727 locomo_writel(0x80, lchip
->base
+ LOCOMO_TADC
);
730 r
= locomo_readl(lchip
->base
+ LOCOMO_TADC
);
732 locomo_writel(r
, lchip
->base
+ LOCOMO_TADC
);
736 r
= locomo_readl(lchip
->base
+ LOCOMO_DAC
);
737 r
|= LOCOMO_DAC_SCLOEB
| LOCOMO_DAC_SDAOEB
;
738 locomo_writel(r
, lchip
->base
+ LOCOMO_DAC
);
740 r
= locomo_readl(lchip
->base
+ LOCOMO_VER
);
741 printk(KERN_INFO
"LoCoMo Chip: %lu%lu\n", (r
>> 8), (r
& 0xff));
744 * The interrupt controller must be initialised before any
745 * other device to ensure that the interrupts are available.
747 if (lchip
->irq
!= NO_IRQ
)
748 locomo_setup_irq(lchip
);
750 for (i
= 0; i
< ARRAY_SIZE(locomo_devices
); i
++)
751 locomo_init_one_child(lchip
, &locomo_devices
[i
]);
760 static int locomo_remove_child(struct device
*dev
, void *data
)
762 device_unregister(dev
);
766 static void __locomo_remove(struct locomo
*lchip
)
768 device_for_each_child(lchip
->dev
, NULL
, locomo_remove_child
);
770 if (lchip
->irq
!= NO_IRQ
) {
771 set_irq_chained_handler(lchip
->irq
, NULL
);
772 set_irq_data(lchip
->irq
, NULL
);
775 iounmap(lchip
->base
);
779 static int locomo_probe(struct platform_device
*dev
)
781 struct resource
*mem
;
784 mem
= platform_get_resource(dev
, IORESOURCE_MEM
, 0);
787 irq
= platform_get_irq(dev
, 0);
791 return __locomo_probe(&dev
->dev
, mem
, irq
);
794 static int locomo_remove(struct platform_device
*dev
)
796 struct locomo
*lchip
= platform_get_drvdata(dev
);
799 __locomo_remove(lchip
);
800 platform_set_drvdata(dev
, NULL
);
807 * Not sure if this should be on the system bus or not yet.
808 * We really want some way to register a system device at
809 * the per-machine level, and then have this driver pick
810 * up the registered devices.
812 static struct platform_driver locomo_device_driver
= {
813 .probe
= locomo_probe
,
814 .remove
= locomo_remove
,
816 .suspend
= locomo_suspend
,
817 .resume
= locomo_resume
,
825 * Get the parent device driver (us) structure
826 * from a child function device
828 static inline struct locomo
*locomo_chip_driver(struct locomo_dev
*ldev
)
830 return (struct locomo
*)dev_get_drvdata(ldev
->dev
.parent
);
833 void locomo_gpio_set_dir(struct locomo_dev
*ldev
, unsigned int bits
, unsigned int dir
)
835 struct locomo
*lchip
= locomo_chip_driver(ldev
);
839 spin_lock_irqsave(&lchip
->lock
, flags
);
841 r
= locomo_readl(lchip
->base
+ LOCOMO_GPD
);
843 locomo_writel(r
, lchip
->base
+ LOCOMO_GPD
);
845 r
= locomo_readl(lchip
->base
+ LOCOMO_GPE
);
850 locomo_writel(r
, lchip
->base
+ LOCOMO_GPE
);
852 spin_unlock_irqrestore(&lchip
->lock
, flags
);
855 unsigned int locomo_gpio_read_level(struct locomo_dev
*ldev
, unsigned int bits
)
857 struct locomo
*lchip
= locomo_chip_driver(ldev
);
861 spin_lock_irqsave(&lchip
->lock
, flags
);
862 ret
= locomo_readl(lchip
->base
+ LOCOMO_GPL
);
863 spin_unlock_irqrestore(&lchip
->lock
, flags
);
869 unsigned int locomo_gpio_read_output(struct locomo_dev
*ldev
, unsigned int bits
)
871 struct locomo
*lchip
= locomo_chip_driver(ldev
);
875 spin_lock_irqsave(&lchip
->lock
, flags
);
876 ret
= locomo_readl(lchip
->base
+ LOCOMO_GPO
);
877 spin_unlock_irqrestore(&lchip
->lock
, flags
);
883 void locomo_gpio_write(struct locomo_dev
*ldev
, unsigned int bits
, unsigned int set
)
885 struct locomo
*lchip
= locomo_chip_driver(ldev
);
889 spin_lock_irqsave(&lchip
->lock
, flags
);
891 r
= locomo_readl(lchip
->base
+ LOCOMO_GPO
);
896 locomo_writel(r
, lchip
->base
+ LOCOMO_GPO
);
898 spin_unlock_irqrestore(&lchip
->lock
, flags
);
901 static void locomo_m62332_sendbit(void *mapbase
, int bit
)
905 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
906 r
&= ~(LOCOMO_DAC_SCLOEB
);
907 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
908 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
909 udelay(DAC_DATA_HOLD_TIME
); /* 300 nsec */
910 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
911 r
&= ~(LOCOMO_DAC_SCLOEB
);
912 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
913 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
914 udelay(DAC_SCL_LOW_HOLD_TIME
); /* 4.7 usec */
917 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
918 r
|= LOCOMO_DAC_SDAOEB
;
919 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
920 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
922 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
923 r
&= ~(LOCOMO_DAC_SDAOEB
);
924 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
925 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
928 udelay(DAC_DATA_SETUP_TIME
); /* 250 nsec */
929 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
930 r
|= LOCOMO_DAC_SCLOEB
;
931 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
932 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
933 udelay(DAC_SCL_HIGH_HOLD_TIME
); /* 4.0 usec */
936 void locomo_m62332_senddata(struct locomo_dev
*ldev
, unsigned int dac_data
, int channel
)
938 struct locomo
*lchip
= locomo_chip_driver(ldev
);
942 void *mapbase
= lchip
->base
;
945 spin_lock_irqsave(&lchip
->lock
, flags
);
948 udelay(DAC_BUS_FREE_TIME
); /* 5.0 usec */
949 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
950 r
|= LOCOMO_DAC_SCLOEB
| LOCOMO_DAC_SDAOEB
;
951 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
952 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
953 udelay(DAC_SCL_HIGH_HOLD_TIME
); /* 4.0 usec */
954 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
955 r
&= ~(LOCOMO_DAC_SDAOEB
);
956 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
957 udelay(DAC_START_HOLD_TIME
); /* 5.0 usec */
958 udelay(DAC_DATA_HOLD_TIME
); /* 300 nsec */
960 /* Send slave address and W bit (LSB is W bit) */
961 data
= (M62332_SLAVE_ADDR
<< 1) | M62332_W_BIT
;
962 for (i
= 1; i
<= 8; i
++) {
963 locomo_m62332_sendbit(mapbase
, data
>> (8 - i
));
967 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
968 r
&= ~(LOCOMO_DAC_SCLOEB
);
969 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
970 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
971 udelay(DAC_SCL_LOW_HOLD_TIME
); /* 4.7 usec */
972 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
973 r
&= ~(LOCOMO_DAC_SDAOEB
);
974 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
975 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
976 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
977 r
|= LOCOMO_DAC_SCLOEB
;
978 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
979 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
980 udelay(DAC_SCL_HIGH_HOLD_TIME
); /* 4.7 usec */
981 if (locomo_readl(mapbase
+ LOCOMO_DAC
) & LOCOMO_DAC_SDAOEB
) { /* High is error */
982 printk(KERN_WARNING
"locomo: m62332_senddata Error 1\n");
986 /* Send Sub address (LSB is channel select) */
987 /* channel = 0 : ch1 select */
988 /* = 1 : ch2 select */
989 data
= M62332_SUB_ADDR
+ channel
;
990 for (i
= 1; i
<= 8; i
++) {
991 locomo_m62332_sendbit(mapbase
, data
>> (8 - i
));
995 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
996 r
&= ~(LOCOMO_DAC_SCLOEB
);
997 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
998 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
999 udelay(DAC_SCL_LOW_HOLD_TIME
); /* 4.7 usec */
1000 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1001 r
&= ~(LOCOMO_DAC_SDAOEB
);
1002 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1003 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
1004 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1005 r
|= LOCOMO_DAC_SCLOEB
;
1006 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1007 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
1008 udelay(DAC_SCL_HIGH_HOLD_TIME
); /* 4.7 usec */
1009 if (locomo_readl(mapbase
+ LOCOMO_DAC
) & LOCOMO_DAC_SDAOEB
) { /* High is error */
1010 printk(KERN_WARNING
"locomo: m62332_senddata Error 2\n");
1015 for (i
= 1; i
<= 8; i
++) {
1016 locomo_m62332_sendbit(mapbase
, dac_data
>> (8 - i
));
1020 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1021 r
&= ~(LOCOMO_DAC_SCLOEB
);
1022 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1023 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
1024 udelay(DAC_SCL_LOW_HOLD_TIME
); /* 4.7 usec */
1025 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1026 r
&= ~(LOCOMO_DAC_SDAOEB
);
1027 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1028 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
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
); /* 4.7 usec */
1034 if (locomo_readl(mapbase
+ LOCOMO_DAC
) & LOCOMO_DAC_SDAOEB
) { /* High is error */
1035 printk(KERN_WARNING
"locomo: m62332_senddata Error 3\n");
1040 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1041 r
&= ~(LOCOMO_DAC_SCLOEB
);
1042 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1043 udelay(DAC_LOW_SETUP_TIME
); /* 300 nsec */
1044 udelay(DAC_SCL_LOW_HOLD_TIME
); /* 4.7 usec */
1045 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1046 r
|= LOCOMO_DAC_SCLOEB
;
1047 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1048 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
1049 udelay(DAC_SCL_HIGH_HOLD_TIME
); /* 4 usec */
1050 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1051 r
|= LOCOMO_DAC_SDAOEB
;
1052 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1053 udelay(DAC_HIGH_SETUP_TIME
); /* 1000 nsec */
1054 udelay(DAC_SCL_HIGH_HOLD_TIME
); /* 4 usec */
1056 r
= locomo_readl(mapbase
+ LOCOMO_DAC
);
1057 r
|= LOCOMO_DAC_SCLOEB
| LOCOMO_DAC_SDAOEB
;
1058 locomo_writel(r
, mapbase
+ LOCOMO_DAC
);
1059 udelay(DAC_LOW_SETUP_TIME
); /* 1000 nsec */
1060 udelay(DAC_SCL_LOW_HOLD_TIME
); /* 4.7 usec */
1062 spin_unlock_irqrestore(&lchip
->lock
, flags
);
1066 * LoCoMo "Register Access Bus."
1068 * We model this as a regular bus type, and hang devices directly
1071 static int locomo_match(struct device
*_dev
, struct device_driver
*_drv
)
1073 struct locomo_dev
*dev
= LOCOMO_DEV(_dev
);
1074 struct locomo_driver
*drv
= LOCOMO_DRV(_drv
);
1076 return dev
->devid
== drv
->devid
;
1079 static int locomo_bus_suspend(struct device
*dev
, pm_message_t state
)
1081 struct locomo_dev
*ldev
= LOCOMO_DEV(dev
);
1082 struct locomo_driver
*drv
= LOCOMO_DRV(dev
->driver
);
1085 if (drv
&& drv
->suspend
)
1086 ret
= drv
->suspend(ldev
, state
);
1090 static int locomo_bus_resume(struct device
*dev
)
1092 struct locomo_dev
*ldev
= LOCOMO_DEV(dev
);
1093 struct locomo_driver
*drv
= LOCOMO_DRV(dev
->driver
);
1096 if (drv
&& drv
->resume
)
1097 ret
= drv
->resume(ldev
);
1101 static int locomo_bus_probe(struct device
*dev
)
1103 struct locomo_dev
*ldev
= LOCOMO_DEV(dev
);
1104 struct locomo_driver
*drv
= LOCOMO_DRV(dev
->driver
);
1108 ret
= drv
->probe(ldev
);
1112 static int locomo_bus_remove(struct device
*dev
)
1114 struct locomo_dev
*ldev
= LOCOMO_DEV(dev
);
1115 struct locomo_driver
*drv
= LOCOMO_DRV(dev
->driver
);
1119 ret
= drv
->remove(ldev
);
1123 struct bus_type locomo_bus_type
= {
1124 .name
= "locomo-bus",
1125 .match
= locomo_match
,
1126 .probe
= locomo_bus_probe
,
1127 .remove
= locomo_bus_remove
,
1128 .suspend
= locomo_bus_suspend
,
1129 .resume
= locomo_bus_resume
,
1132 int locomo_driver_register(struct locomo_driver
*driver
)
1134 driver
->drv
.bus
= &locomo_bus_type
;
1135 return driver_register(&driver
->drv
);
1138 void locomo_driver_unregister(struct locomo_driver
*driver
)
1140 driver_unregister(&driver
->drv
);
1143 static int __init
locomo_init(void)
1145 int ret
= bus_register(&locomo_bus_type
);
1147 platform_driver_register(&locomo_device_driver
);
1151 static void __exit
locomo_exit(void)
1153 platform_driver_unregister(&locomo_device_driver
);
1154 bus_unregister(&locomo_bus_type
);
1157 module_init(locomo_init
);
1158 module_exit(locomo_exit
);
1160 MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1161 MODULE_LICENSE("GPL");
1162 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1164 EXPORT_SYMBOL(locomo_driver_register
);
1165 EXPORT_SYMBOL(locomo_driver_unregister
);
1166 EXPORT_SYMBOL(locomo_gpio_set_dir
);
1167 EXPORT_SYMBOL(locomo_gpio_read_level
);
1168 EXPORT_SYMBOL(locomo_gpio_read_output
);
1169 EXPORT_SYMBOL(locomo_gpio_write
);
1170 EXPORT_SYMBOL(locomo_m62332_senddata
);