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/module.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/errno.h>
23 #include <linux/ioport.h>
24 #include <linux/platform_device.h>
25 #include <linux/slab.h>
26 #include <linux/spinlock.h>
29 #include <mach/hardware.h>
31 #include <asm/mach/irq.h>
33 #include <asm/hardware/locomo.h>
35 /* M62332 output channel selection */
36 #define M62332_EVR_CH 1 /* M62332 volume channel number */
37 /* 0 : CH.1 , 1 : CH. 2 */
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) */
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 */
56 /* the following is the overall data for the locomo chip */
68 struct locomo_dev_info {
76 /* All the locomo devices. If offset is non-zero, the mapbase for the
77 * locomo_dev will be set to the chip base plus offset. If offset is
78 * zero, then the mapbase for the locomo_dev will be set to zero. An
79 * offset of zero means the device only uses GPIOs or other helper
80 * functions inside this file */
81 static struct locomo_dev_info locomo_devices[] = {
83 .devid = LOCOMO_DEVID_KEYBOARD,
87 .name = "locomo-keyboard",
88 .offset = LOCOMO_KEYBOARD,
92 .devid = LOCOMO_DEVID_FRONTLIGHT,
94 .name = "locomo-frontlight",
95 .offset = LOCOMO_FRONTLIGHT,
100 .devid = LOCOMO_DEVID_BACKLIGHT,
102 .name = "locomo-backlight",
103 .offset = LOCOMO_BACKLIGHT,
107 .devid = LOCOMO_DEVID_AUDIO,
109 .name = "locomo-audio",
110 .offset = LOCOMO_AUDIO,
114 .devid = LOCOMO_DEVID_LED,
116 .name = "locomo-led",
117 .offset = LOCOMO_LED,
121 .devid = LOCOMO_DEVID_UART,
123 .name = "locomo-uart",
128 .devid = LOCOMO_DEVID_SPI,
130 .name = "locomo-spi",
131 .offset = LOCOMO_SPI,
137 /** LoCoMo interrupt handling stuff.
138 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
139 * that is, there is only one real hardware interrupt
140 * we determine which interrupt it is by reading some IO memory.
141 * We have two levels of expansion, first in the handler for the
142 * hardware interrupt we generate an interrupt
143 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
145 * hardware irq reads LOCOMO_ICR & 0x0f00
146 * IRQ_LOCOMO_KEY_BASE
147 * IRQ_LOCOMO_GPIO_BASE
149 * IRQ_LOCOMO_SPI_BASE
150 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
152 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
153 * IRQ_LOCOMO_GPIO[0-15]
154 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
156 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
159 * IRQ_LOCOMO_SPI_OVRN
160 * IRQ_LOCOMO_SPI_TEND
163 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
164 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
165 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
166 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
167 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
169 static void locomo_handler(unsigned int irq, struct irq_desc *desc)
172 void __iomem *mapbase = get_irq_chip_data(irq);
174 /* Acknowledge the parent IRQ */
175 desc->chip->ack(irq);
177 /* check why this interrupt was generated */
178 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
181 /* generate the next interrupt(s) */
182 irq = LOCOMO_IRQ_START;
183 for (i = 0; i <= 3; i++, irq++) {
184 if (req & (0x0100 << i)) {
185 generic_handle_irq(irq);
192 static void locomo_ack_irq(unsigned int irq)
196 static void locomo_mask_irq(unsigned int irq)
198 void __iomem *mapbase = get_irq_chip_data(irq);
200 r = locomo_readl(mapbase + LOCOMO_ICR);
201 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START));
202 locomo_writel(r, mapbase + LOCOMO_ICR);
205 static void locomo_unmask_irq(unsigned int irq)
207 void __iomem *mapbase = get_irq_chip_data(irq);
209 r = locomo_readl(mapbase + LOCOMO_ICR);
210 r |= (0x0010 << (irq - LOCOMO_IRQ_START));
211 locomo_writel(r, mapbase + LOCOMO_ICR);
214 static struct irq_chip locomo_chip = {
216 .ack = locomo_ack_irq,
217 .mask = locomo_mask_irq,
218 .unmask = locomo_unmask_irq,
221 static void locomo_key_handler(unsigned int irq, struct irq_desc *desc)
223 void __iomem *mapbase = get_irq_chip_data(irq);
225 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
226 generic_handle_irq(LOCOMO_IRQ_KEY_START);
230 static void locomo_key_ack_irq(unsigned int irq)
232 void __iomem *mapbase = get_irq_chip_data(irq);
234 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
235 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
236 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
239 static void locomo_key_mask_irq(unsigned int irq)
241 void __iomem *mapbase = get_irq_chip_data(irq);
243 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
244 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
245 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
248 static void locomo_key_unmask_irq(unsigned int irq)
250 void __iomem *mapbase = get_irq_chip_data(irq);
252 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
253 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
254 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
257 static struct irq_chip locomo_key_chip = {
258 .name = "LOCOMO-key",
259 .ack = locomo_key_ack_irq,
260 .mask = locomo_key_mask_irq,
261 .unmask = locomo_key_unmask_irq,
264 static void locomo_gpio_handler(unsigned int irq, struct irq_desc *desc)
267 void __iomem *mapbase = get_irq_chip_data(irq);
269 req = locomo_readl(mapbase + LOCOMO_GIR) &
270 locomo_readl(mapbase + LOCOMO_GPD) &
274 irq = LOCOMO_IRQ_GPIO_START;
275 for (i = 0; i <= 15; i++, irq++) {
276 if (req & (0x0001 << i)) {
277 generic_handle_irq(irq);
283 static void locomo_gpio_ack_irq(unsigned int irq)
285 void __iomem *mapbase = get_irq_chip_data(irq);
287 r = locomo_readl(mapbase + LOCOMO_GWE);
288 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
289 locomo_writel(r, mapbase + LOCOMO_GWE);
291 r = locomo_readl(mapbase + LOCOMO_GIS);
292 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
293 locomo_writel(r, mapbase + LOCOMO_GIS);
295 r = locomo_readl(mapbase + LOCOMO_GWE);
296 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
297 locomo_writel(r, mapbase + LOCOMO_GWE);
300 static void locomo_gpio_mask_irq(unsigned int irq)
302 void __iomem *mapbase = get_irq_chip_data(irq);
304 r = locomo_readl(mapbase + LOCOMO_GIE);
305 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
306 locomo_writel(r, mapbase + LOCOMO_GIE);
309 static void locomo_gpio_unmask_irq(unsigned int irq)
311 void __iomem *mapbase = get_irq_chip_data(irq);
313 r = locomo_readl(mapbase + LOCOMO_GIE);
314 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
315 locomo_writel(r, mapbase + LOCOMO_GIE);
318 static int GPIO_IRQ_rising_edge;
319 static int GPIO_IRQ_falling_edge;
321 static int locomo_gpio_type(unsigned int irq, unsigned int type)
324 void __iomem *mapbase = get_irq_chip_data(irq);
326 mask = 1 << (irq - LOCOMO_IRQ_GPIO_START);
328 if (type == IRQ_TYPE_PROBE) {
329 if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask)
331 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
334 if (type & IRQ_TYPE_EDGE_RISING)
335 GPIO_IRQ_rising_edge |= mask;
337 GPIO_IRQ_rising_edge &= ~mask;
338 if (type & IRQ_TYPE_EDGE_FALLING)
339 GPIO_IRQ_falling_edge |= mask;
341 GPIO_IRQ_falling_edge &= ~mask;
342 locomo_writel(GPIO_IRQ_rising_edge, mapbase + LOCOMO_GRIE);
343 locomo_writel(GPIO_IRQ_falling_edge, mapbase + LOCOMO_GFIE);
348 static struct irq_chip locomo_gpio_chip = {
349 .name = "LOCOMO-gpio",
350 .ack = locomo_gpio_ack_irq,
351 .mask = locomo_gpio_mask_irq,
352 .unmask = locomo_gpio_unmask_irq,
353 .set_type = locomo_gpio_type,
356 static void locomo_lt_handler(unsigned int irq, struct irq_desc *desc)
358 void __iomem *mapbase = get_irq_chip_data(irq);
360 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
361 generic_handle_irq(LOCOMO_IRQ_LT_START);
365 static void locomo_lt_ack_irq(unsigned int irq)
367 void __iomem *mapbase = get_irq_chip_data(irq);
369 r = locomo_readl(mapbase + LOCOMO_LTINT);
370 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
371 locomo_writel(r, mapbase + LOCOMO_LTINT);
374 static void locomo_lt_mask_irq(unsigned int irq)
376 void __iomem *mapbase = get_irq_chip_data(irq);
378 r = locomo_readl(mapbase + LOCOMO_LTINT);
379 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START));
380 locomo_writel(r, mapbase + LOCOMO_LTINT);
383 static void locomo_lt_unmask_irq(unsigned int irq)
385 void __iomem *mapbase = get_irq_chip_data(irq);
387 r = locomo_readl(mapbase + LOCOMO_LTINT);
388 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
389 locomo_writel(r, mapbase + LOCOMO_LTINT);
392 static struct irq_chip locomo_lt_chip = {
394 .ack = locomo_lt_ack_irq,
395 .mask = locomo_lt_mask_irq,
396 .unmask = locomo_lt_unmask_irq,
399 static void locomo_spi_handler(unsigned int irq, struct irq_desc *desc)
402 void __iomem *mapbase = get_irq_chip_data(irq);
404 req = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIR) & 0x000F;
406 irq = LOCOMO_IRQ_SPI_START;
408 for (i = 0; i <= 3; i++, irq++) {
409 if (req & (0x0001 << i)) {
410 generic_handle_irq(irq);
416 static void locomo_spi_ack_irq(unsigned int irq)
418 void __iomem *mapbase = get_irq_chip_data(irq);
420 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
421 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
422 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
424 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
425 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
426 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
428 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
429 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
430 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
433 static void locomo_spi_mask_irq(unsigned int irq)
435 void __iomem *mapbase = get_irq_chip_data(irq);
437 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
438 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
439 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
442 static void locomo_spi_unmask_irq(unsigned int irq)
444 void __iomem *mapbase = get_irq_chip_data(irq);
446 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
447 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
448 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
451 static struct irq_chip locomo_spi_chip = {
452 .name = "LOCOMO-spi",
453 .ack = locomo_spi_ack_irq,
454 .mask = locomo_spi_mask_irq,
455 .unmask = locomo_spi_unmask_irq,
458 static void locomo_setup_irq(struct locomo *lchip)
461 void __iomem *irqbase = lchip->base;
464 * Install handler for IRQ_LOCOMO_HW.
466 set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
467 set_irq_chip_data(lchip->irq, irqbase);
468 set_irq_chained_handler(lchip->irq, locomo_handler);
470 /* Install handlers for IRQ_LOCOMO_*_BASE */
471 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
472 set_irq_chip_data(IRQ_LOCOMO_KEY_BASE, irqbase);
473 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
475 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
476 set_irq_chip_data(IRQ_LOCOMO_GPIO_BASE, irqbase);
477 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
479 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
480 set_irq_chip_data(IRQ_LOCOMO_LT_BASE, irqbase);
481 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
483 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
484 set_irq_chip_data(IRQ_LOCOMO_SPI_BASE, irqbase);
485 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
487 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
488 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
489 set_irq_chip_data(LOCOMO_IRQ_KEY_START, irqbase);
490 set_irq_handler(LOCOMO_IRQ_KEY_START, handle_edge_irq);
491 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
493 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
494 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
495 set_irq_chip(irq, &locomo_gpio_chip);
496 set_irq_chip_data(irq, irqbase);
497 set_irq_handler(irq, handle_edge_irq);
498 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
501 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
502 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
503 set_irq_chip_data(LOCOMO_IRQ_LT_START, irqbase);
504 set_irq_handler(LOCOMO_IRQ_LT_START, handle_edge_irq);
505 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
507 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
508 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 4; irq++) {
509 set_irq_chip(irq, &locomo_spi_chip);
510 set_irq_chip_data(irq, irqbase);
511 set_irq_handler(irq, handle_edge_irq);
512 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
517 static void locomo_dev_release(struct device *_dev)
519 struct locomo_dev *dev = LOCOMO_DEV(_dev);
525 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
527 struct locomo_dev *dev;
530 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
537 * If the parent device has a DMA mask associated with it,
538 * propagate it down to the children.
540 if (lchip->dev->dma_mask) {
541 dev->dma_mask = *lchip->dev->dma_mask;
542 dev->dev.dma_mask = &dev->dma_mask;
545 dev_set_name(&dev->dev, "%s", info->name);
546 dev->devid = info->devid;
547 dev->dev.parent = lchip->dev;
548 dev->dev.bus = &locomo_bus_type;
549 dev->dev.release = locomo_dev_release;
550 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
553 dev->mapbase = lchip->base + info->offset;
556 dev->length = info->length;
558 memmove(dev->irq, info->irq, sizeof(dev->irq));
560 ret = device_register(&dev->dev);
570 struct locomo_save_data {
578 static int locomo_suspend(struct platform_device *dev, pm_message_t state)
580 struct locomo *lchip = platform_get_drvdata(dev);
581 struct locomo_save_data *save;
584 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
588 lchip->saved_state = save;
590 spin_lock_irqsave(&lchip->lock, flags);
592 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
593 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
594 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */
595 locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
596 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
597 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
598 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
599 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
600 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */
601 locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
603 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
604 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
605 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
607 if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
608 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
610 /* 18MHz already enabled, so no wait */
611 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
613 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
614 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
615 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
617 spin_unlock_irqrestore(&lchip->lock, flags);
622 static int locomo_resume(struct platform_device *dev)
624 struct locomo *lchip = platform_get_drvdata(dev);
625 struct locomo_save_data *save;
629 save = lchip->saved_state;
633 spin_lock_irqsave(&lchip->lock, flags);
635 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
636 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
637 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
638 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
639 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
641 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
642 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
644 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
645 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
647 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
648 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
650 spin_unlock_irqrestore(&lchip->lock, flags);
652 lchip->saved_state = NULL;
661 * locomo_probe - probe for a single LoCoMo chip.
662 * @phys_addr: physical address of device.
664 * Probe for a LoCoMo chip. This must be called
665 * before any other locomo-specific code.
668 * %-ENODEV device not found.
669 * %-EBUSY physical address already marked in-use.
673 __locomo_probe(struct device *me, struct resource *mem, int irq)
675 struct locomo *lchip;
677 int i, ret = -ENODEV;
679 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
683 spin_lock_init(&lchip->lock);
686 dev_set_drvdata(lchip->dev, lchip);
688 lchip->phys = mem->start;
692 * Map the whole region. This also maps the
693 * registers for our children.
695 lchip->base = ioremap(mem->start, PAGE_SIZE);
701 /* locomo initialize */
702 locomo_writel(0, lchip->base + LOCOMO_ICR);
704 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
707 locomo_writel(0, lchip->base + LOCOMO_GPO);
708 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
709 , lchip->base + LOCOMO_GPE);
710 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
711 , lchip->base + LOCOMO_GPD);
712 locomo_writel(0, lchip->base + LOCOMO_GIE);
715 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
716 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
719 locomo_writel(0, lchip->base + LOCOMO_LTINT);
721 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
723 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
724 r = locomo_readl(lchip->base + LOCOMO_ASD);
726 locomo_writel(r, lchip->base + LOCOMO_ASD);
728 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
729 r = locomo_readl(lchip->base + LOCOMO_HSD);
731 locomo_writel(r, lchip->base + LOCOMO_HSD);
733 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
736 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
739 r = locomo_readl(lchip->base + LOCOMO_TADC);
741 locomo_writel(r, lchip->base + LOCOMO_TADC);
745 r = locomo_readl(lchip->base + LOCOMO_DAC);
746 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
747 locomo_writel(r, lchip->base + LOCOMO_DAC);
749 r = locomo_readl(lchip->base + LOCOMO_VER);
750 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
753 * The interrupt controller must be initialised before any
754 * other device to ensure that the interrupts are available.
756 if (lchip->irq != NO_IRQ)
757 locomo_setup_irq(lchip);
759 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
760 locomo_init_one_child(lchip, &locomo_devices[i]);
768 static int locomo_remove_child(struct device *dev, void *data)
770 device_unregister(dev);
774 static void __locomo_remove(struct locomo *lchip)
776 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
778 if (lchip->irq != NO_IRQ) {
779 set_irq_chained_handler(lchip->irq, NULL);
780 set_irq_data(lchip->irq, NULL);
783 iounmap(lchip->base);
787 static int locomo_probe(struct platform_device *dev)
789 struct resource *mem;
792 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
795 irq = platform_get_irq(dev, 0);
799 return __locomo_probe(&dev->dev, mem, irq);
802 static int locomo_remove(struct platform_device *dev)
804 struct locomo *lchip = platform_get_drvdata(dev);
807 __locomo_remove(lchip);
808 platform_set_drvdata(dev, NULL);
815 * Not sure if this should be on the system bus or not yet.
816 * We really want some way to register a system device at
817 * the per-machine level, and then have this driver pick
818 * up the registered devices.
820 static struct platform_driver locomo_device_driver = {
821 .probe = locomo_probe,
822 .remove = locomo_remove,
824 .suspend = locomo_suspend,
825 .resume = locomo_resume,
833 * Get the parent device driver (us) structure
834 * from a child function device
836 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
838 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
841 void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
843 struct locomo *lchip = dev_get_drvdata(dev);
850 spin_lock_irqsave(&lchip->lock, flags);
852 r = locomo_readl(lchip->base + LOCOMO_GPD);
857 locomo_writel(r, lchip->base + LOCOMO_GPD);
859 r = locomo_readl(lchip->base + LOCOMO_GPE);
864 locomo_writel(r, lchip->base + LOCOMO_GPE);
866 spin_unlock_irqrestore(&lchip->lock, flags);
869 int locomo_gpio_read_level(struct device *dev, unsigned int bits)
871 struct locomo *lchip = dev_get_drvdata(dev);
878 spin_lock_irqsave(&lchip->lock, flags);
879 ret = locomo_readl(lchip->base + LOCOMO_GPL);
880 spin_unlock_irqrestore(&lchip->lock, flags);
886 int locomo_gpio_read_output(struct device *dev, unsigned int bits)
888 struct locomo *lchip = dev_get_drvdata(dev);
895 spin_lock_irqsave(&lchip->lock, flags);
896 ret = locomo_readl(lchip->base + LOCOMO_GPO);
897 spin_unlock_irqrestore(&lchip->lock, flags);
903 void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set)
905 struct locomo *lchip = dev_get_drvdata(dev);
912 spin_lock_irqsave(&lchip->lock, flags);
914 r = locomo_readl(lchip->base + LOCOMO_GPO);
919 locomo_writel(r, lchip->base + LOCOMO_GPO);
921 spin_unlock_irqrestore(&lchip->lock, flags);
924 static void locomo_m62332_sendbit(void *mapbase, int bit)
928 r = locomo_readl(mapbase + LOCOMO_DAC);
929 r &= ~(LOCOMO_DAC_SCLOEB);
930 locomo_writel(r, mapbase + LOCOMO_DAC);
931 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
932 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
933 r = locomo_readl(mapbase + LOCOMO_DAC);
934 r &= ~(LOCOMO_DAC_SCLOEB);
935 locomo_writel(r, mapbase + LOCOMO_DAC);
936 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
937 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
940 r = locomo_readl(mapbase + LOCOMO_DAC);
941 r |= LOCOMO_DAC_SDAOEB;
942 locomo_writel(r, mapbase + LOCOMO_DAC);
943 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
945 r = locomo_readl(mapbase + LOCOMO_DAC);
946 r &= ~(LOCOMO_DAC_SDAOEB);
947 locomo_writel(r, mapbase + LOCOMO_DAC);
948 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
951 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
952 r = locomo_readl(mapbase + LOCOMO_DAC);
953 r |= LOCOMO_DAC_SCLOEB;
954 locomo_writel(r, mapbase + LOCOMO_DAC);
955 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
956 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
959 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
961 struct locomo *lchip = locomo_chip_driver(ldev);
965 void *mapbase = lchip->base;
968 spin_lock_irqsave(&lchip->lock, flags);
971 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
972 r = locomo_readl(mapbase + LOCOMO_DAC);
973 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
974 locomo_writel(r, mapbase + LOCOMO_DAC);
975 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
976 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
977 r = locomo_readl(mapbase + LOCOMO_DAC);
978 r &= ~(LOCOMO_DAC_SDAOEB);
979 locomo_writel(r, mapbase + LOCOMO_DAC);
980 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
981 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
983 /* Send slave address and W bit (LSB is W bit) */
984 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
985 for (i = 1; i <= 8; i++) {
986 locomo_m62332_sendbit(mapbase, data >> (8 - i));
990 r = locomo_readl(mapbase + LOCOMO_DAC);
991 r &= ~(LOCOMO_DAC_SCLOEB);
992 locomo_writel(r, mapbase + LOCOMO_DAC);
993 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
994 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
995 r = locomo_readl(mapbase + LOCOMO_DAC);
996 r &= ~(LOCOMO_DAC_SDAOEB);
997 locomo_writel(r, mapbase + LOCOMO_DAC);
998 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
999 r = locomo_readl(mapbase + LOCOMO_DAC);
1000 r |= LOCOMO_DAC_SCLOEB;
1001 locomo_writel(r, mapbase + LOCOMO_DAC);
1002 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1003 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1004 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1005 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
1009 /* Send Sub address (LSB is channel select) */
1010 /* channel = 0 : ch1 select */
1011 /* = 1 : ch2 select */
1012 data = M62332_SUB_ADDR + channel;
1013 for (i = 1; i <= 8; i++) {
1014 locomo_m62332_sendbit(mapbase, data >> (8 - i));
1018 r = locomo_readl(mapbase + LOCOMO_DAC);
1019 r &= ~(LOCOMO_DAC_SCLOEB);
1020 locomo_writel(r, mapbase + LOCOMO_DAC);
1021 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1022 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1023 r = locomo_readl(mapbase + LOCOMO_DAC);
1024 r &= ~(LOCOMO_DAC_SDAOEB);
1025 locomo_writel(r, mapbase + LOCOMO_DAC);
1026 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1027 r = locomo_readl(mapbase + LOCOMO_DAC);
1028 r |= LOCOMO_DAC_SCLOEB;
1029 locomo_writel(r, mapbase + LOCOMO_DAC);
1030 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1031 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1032 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1033 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
1038 for (i = 1; i <= 8; i++) {
1039 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
1043 r = locomo_readl(mapbase + LOCOMO_DAC);
1044 r &= ~(LOCOMO_DAC_SCLOEB);
1045 locomo_writel(r, mapbase + LOCOMO_DAC);
1046 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1047 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1048 r = locomo_readl(mapbase + LOCOMO_DAC);
1049 r &= ~(LOCOMO_DAC_SDAOEB);
1050 locomo_writel(r, mapbase + LOCOMO_DAC);
1051 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1052 r = locomo_readl(mapbase + LOCOMO_DAC);
1053 r |= LOCOMO_DAC_SCLOEB;
1054 locomo_writel(r, mapbase + LOCOMO_DAC);
1055 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1056 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1057 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1058 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
1063 r = locomo_readl(mapbase + LOCOMO_DAC);
1064 r &= ~(LOCOMO_DAC_SCLOEB);
1065 locomo_writel(r, mapbase + LOCOMO_DAC);
1066 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1067 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1068 r = locomo_readl(mapbase + LOCOMO_DAC);
1069 r |= LOCOMO_DAC_SCLOEB;
1070 locomo_writel(r, mapbase + LOCOMO_DAC);
1071 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1072 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1073 r = locomo_readl(mapbase + LOCOMO_DAC);
1074 r |= LOCOMO_DAC_SDAOEB;
1075 locomo_writel(r, mapbase + LOCOMO_DAC);
1076 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1077 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1079 r = locomo_readl(mapbase + LOCOMO_DAC);
1080 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1081 locomo_writel(r, mapbase + LOCOMO_DAC);
1082 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1083 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1085 spin_unlock_irqrestore(&lchip->lock, flags);
1089 * Frontlight control
1092 static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
1094 void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
1096 unsigned long flags;
1097 struct locomo *lchip = locomo_chip_driver(dev);
1100 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
1102 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
1104 spin_lock_irqsave(&lchip->lock, flags);
1105 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1107 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
1108 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1109 spin_unlock_irqrestore(&lchip->lock, flags);
1111 EXPORT_SYMBOL(locomo_frontlight_set);
1114 * LoCoMo "Register Access Bus."
1116 * We model this as a regular bus type, and hang devices directly
1119 static int locomo_match(struct device *_dev, struct device_driver *_drv)
1121 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1122 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1124 return dev->devid == drv->devid;
1127 static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1129 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1130 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1133 if (drv && drv->suspend)
1134 ret = drv->suspend(ldev, state);
1138 static int locomo_bus_resume(struct device *dev)
1140 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1141 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1144 if (drv && drv->resume)
1145 ret = drv->resume(ldev);
1149 static int locomo_bus_probe(struct device *dev)
1151 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1152 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1156 ret = drv->probe(ldev);
1160 static int locomo_bus_remove(struct device *dev)
1162 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1163 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1167 ret = drv->remove(ldev);
1171 struct bus_type locomo_bus_type = {
1172 .name = "locomo-bus",
1173 .match = locomo_match,
1174 .probe = locomo_bus_probe,
1175 .remove = locomo_bus_remove,
1176 .suspend = locomo_bus_suspend,
1177 .resume = locomo_bus_resume,
1180 int locomo_driver_register(struct locomo_driver *driver)
1182 driver->drv.bus = &locomo_bus_type;
1183 return driver_register(&driver->drv);
1186 void locomo_driver_unregister(struct locomo_driver *driver)
1188 driver_unregister(&driver->drv);
1191 static int __init locomo_init(void)
1193 int ret = bus_register(&locomo_bus_type);
1195 platform_driver_register(&locomo_device_driver);
1199 static void __exit locomo_exit(void)
1201 platform_driver_unregister(&locomo_device_driver);
1202 bus_unregister(&locomo_bus_type);
1205 module_init(locomo_init);
1206 module_exit(locomo_exit);
1208 MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1209 MODULE_LICENSE("GPL");
1210 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1212 EXPORT_SYMBOL(locomo_driver_register);
1213 EXPORT_SYMBOL(locomo_driver_unregister);
1214 EXPORT_SYMBOL(locomo_gpio_set_dir);
1215 EXPORT_SYMBOL(locomo_gpio_read_level);
1216 EXPORT_SYMBOL(locomo_gpio_read_output);
1217 EXPORT_SYMBOL(locomo_gpio_write);
1218 EXPORT_SYMBOL(locomo_m62332_senddata);