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>
28 #include <asm/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)
173 void __iomem *mapbase = get_irq_chip_data(irq);
175 /* Acknowledge the parent IRQ */
176 desc->chip->ack(irq);
178 /* check why this interrupt was generated */
179 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
182 /* generate the next interrupt(s) */
183 irq = LOCOMO_IRQ_START;
185 for (i = 0; i <= 3; i++, d++, irq++) {
186 if (req & (0x0100 << i)) {
187 desc_handle_irq(irq, d);
194 static void locomo_ack_irq(unsigned int irq)
198 static void locomo_mask_irq(unsigned int irq)
200 void __iomem *mapbase = get_irq_chip_data(irq);
202 r = locomo_readl(mapbase + LOCOMO_ICR);
203 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START));
204 locomo_writel(r, mapbase + LOCOMO_ICR);
207 static void locomo_unmask_irq(unsigned int irq)
209 void __iomem *mapbase = get_irq_chip_data(irq);
211 r = locomo_readl(mapbase + LOCOMO_ICR);
212 r |= (0x0010 << (irq - LOCOMO_IRQ_START));
213 locomo_writel(r, mapbase + LOCOMO_ICR);
216 static struct irq_chip locomo_chip = {
218 .ack = locomo_ack_irq,
219 .mask = locomo_mask_irq,
220 .unmask = locomo_unmask_irq,
223 static void locomo_key_handler(unsigned int irq, struct irq_desc *desc)
226 void __iomem *mapbase = get_irq_chip_data(irq);
228 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
229 d = irq_desc + LOCOMO_IRQ_KEY_START;
230 desc_handle_irq(LOCOMO_IRQ_KEY_START, d);
234 static void locomo_key_ack_irq(unsigned int irq)
236 void __iomem *mapbase = get_irq_chip_data(irq);
238 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
239 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
240 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
243 static void locomo_key_mask_irq(unsigned int irq)
245 void __iomem *mapbase = get_irq_chip_data(irq);
247 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
248 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
249 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
252 static void locomo_key_unmask_irq(unsigned int irq)
254 void __iomem *mapbase = get_irq_chip_data(irq);
256 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
257 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
258 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
261 static struct irq_chip locomo_key_chip = {
262 .name = "LOCOMO-key",
263 .ack = locomo_key_ack_irq,
264 .mask = locomo_key_mask_irq,
265 .unmask = locomo_key_unmask_irq,
268 static void locomo_gpio_handler(unsigned int irq, struct irq_desc *desc)
272 void __iomem *mapbase = get_irq_chip_data(irq);
274 req = locomo_readl(mapbase + LOCOMO_GIR) &
275 locomo_readl(mapbase + LOCOMO_GPD) &
279 irq = LOCOMO_IRQ_GPIO_START;
280 d = irq_desc + LOCOMO_IRQ_GPIO_START;
281 for (i = 0; i <= 15; i++, irq++, d++) {
282 if (req & (0x0001 << i)) {
283 desc_handle_irq(irq, d);
289 static void locomo_gpio_ack_irq(unsigned int irq)
291 void __iomem *mapbase = get_irq_chip_data(irq);
293 r = locomo_readl(mapbase + LOCOMO_GWE);
294 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
295 locomo_writel(r, mapbase + LOCOMO_GWE);
297 r = locomo_readl(mapbase + LOCOMO_GIS);
298 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
299 locomo_writel(r, mapbase + LOCOMO_GIS);
301 r = locomo_readl(mapbase + LOCOMO_GWE);
302 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
303 locomo_writel(r, mapbase + LOCOMO_GWE);
306 static void locomo_gpio_mask_irq(unsigned int irq)
308 void __iomem *mapbase = get_irq_chip_data(irq);
310 r = locomo_readl(mapbase + LOCOMO_GIE);
311 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
312 locomo_writel(r, mapbase + LOCOMO_GIE);
315 static void locomo_gpio_unmask_irq(unsigned int irq)
317 void __iomem *mapbase = get_irq_chip_data(irq);
319 r = locomo_readl(mapbase + LOCOMO_GIE);
320 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
321 locomo_writel(r, mapbase + LOCOMO_GIE);
324 static int GPIO_IRQ_rising_edge;
325 static int GPIO_IRQ_falling_edge;
327 static int locomo_gpio_type(unsigned int irq, unsigned int type)
330 void __iomem *mapbase = get_irq_chip_data(irq);
332 mask = 1 << (irq - LOCOMO_IRQ_GPIO_START);
334 if (type == IRQT_PROBE) {
335 if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask)
337 type = __IRQT_RISEDGE | __IRQT_FALEDGE;
340 if (type & __IRQT_RISEDGE)
341 GPIO_IRQ_rising_edge |= mask;
343 GPIO_IRQ_rising_edge &= ~mask;
344 if (type & __IRQT_FALEDGE)
345 GPIO_IRQ_falling_edge |= mask;
347 GPIO_IRQ_falling_edge &= ~mask;
348 locomo_writel(GPIO_IRQ_rising_edge, mapbase + LOCOMO_GRIE);
349 locomo_writel(GPIO_IRQ_falling_edge, mapbase + LOCOMO_GFIE);
354 static struct irq_chip locomo_gpio_chip = {
355 .name = "LOCOMO-gpio",
356 .ack = locomo_gpio_ack_irq,
357 .mask = locomo_gpio_mask_irq,
358 .unmask = locomo_gpio_unmask_irq,
359 .set_type = locomo_gpio_type,
362 static void locomo_lt_handler(unsigned int irq, struct irq_desc *desc)
365 void __iomem *mapbase = get_irq_chip_data(irq);
367 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
368 d = irq_desc + LOCOMO_IRQ_LT_START;
369 desc_handle_irq(LOCOMO_IRQ_LT_START, d);
373 static void locomo_lt_ack_irq(unsigned int irq)
375 void __iomem *mapbase = get_irq_chip_data(irq);
377 r = locomo_readl(mapbase + LOCOMO_LTINT);
378 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
379 locomo_writel(r, mapbase + LOCOMO_LTINT);
382 static void locomo_lt_mask_irq(unsigned int irq)
384 void __iomem *mapbase = get_irq_chip_data(irq);
386 r = locomo_readl(mapbase + LOCOMO_LTINT);
387 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START));
388 locomo_writel(r, mapbase + LOCOMO_LTINT);
391 static void locomo_lt_unmask_irq(unsigned int irq)
393 void __iomem *mapbase = get_irq_chip_data(irq);
395 r = locomo_readl(mapbase + LOCOMO_LTINT);
396 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
397 locomo_writel(r, mapbase + LOCOMO_LTINT);
400 static struct irq_chip locomo_lt_chip = {
402 .ack = locomo_lt_ack_irq,
403 .mask = locomo_lt_mask_irq,
404 .unmask = locomo_lt_unmask_irq,
407 static void locomo_spi_handler(unsigned int irq, struct irq_desc *desc)
411 void __iomem *mapbase = get_irq_chip_data(irq);
413 req = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIR) & 0x000F;
415 irq = LOCOMO_IRQ_SPI_START;
418 for (i = 0; i <= 3; i++, irq++, d++) {
419 if (req & (0x0001 << i)) {
420 desc_handle_irq(irq, d);
426 static void locomo_spi_ack_irq(unsigned int irq)
428 void __iomem *mapbase = get_irq_chip_data(irq);
430 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
431 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
432 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
434 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
435 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
436 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
438 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
439 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
440 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
443 static void locomo_spi_mask_irq(unsigned int irq)
445 void __iomem *mapbase = get_irq_chip_data(irq);
447 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
448 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
449 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
452 static void locomo_spi_unmask_irq(unsigned int irq)
454 void __iomem *mapbase = get_irq_chip_data(irq);
456 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
457 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
458 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
461 static struct irq_chip locomo_spi_chip = {
462 .name = "LOCOMO-spi",
463 .ack = locomo_spi_ack_irq,
464 .mask = locomo_spi_mask_irq,
465 .unmask = locomo_spi_unmask_irq,
468 static void locomo_setup_irq(struct locomo *lchip)
471 void __iomem *irqbase = lchip->base;
474 * Install handler for IRQ_LOCOMO_HW.
476 set_irq_type(lchip->irq, IRQT_FALLING);
477 set_irq_chip_data(lchip->irq, irqbase);
478 set_irq_chained_handler(lchip->irq, locomo_handler);
480 /* Install handlers for IRQ_LOCOMO_*_BASE */
481 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
482 set_irq_chip_data(IRQ_LOCOMO_KEY_BASE, irqbase);
483 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
485 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
486 set_irq_chip_data(IRQ_LOCOMO_GPIO_BASE, irqbase);
487 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
489 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
490 set_irq_chip_data(IRQ_LOCOMO_LT_BASE, irqbase);
491 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
493 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
494 set_irq_chip_data(IRQ_LOCOMO_SPI_BASE, irqbase);
495 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
497 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
498 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
499 set_irq_chip_data(LOCOMO_IRQ_KEY_START, irqbase);
500 set_irq_handler(LOCOMO_IRQ_KEY_START, handle_edge_irq);
501 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
503 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
504 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
505 set_irq_chip(irq, &locomo_gpio_chip);
506 set_irq_chip_data(irq, irqbase);
507 set_irq_handler(irq, handle_edge_irq);
508 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
511 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
512 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
513 set_irq_chip_data(LOCOMO_IRQ_LT_START, irqbase);
514 set_irq_handler(LOCOMO_IRQ_LT_START, handle_edge_irq);
515 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
517 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
518 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 4; irq++) {
519 set_irq_chip(irq, &locomo_spi_chip);
520 set_irq_chip_data(irq, irqbase);
521 set_irq_handler(irq, handle_edge_irq);
522 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
527 static void locomo_dev_release(struct device *_dev)
529 struct locomo_dev *dev = LOCOMO_DEV(_dev);
535 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
537 struct locomo_dev *dev;
540 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
546 strncpy(dev->dev.bus_id, info->name, sizeof(dev->dev.bus_id));
548 * If the parent device has a DMA mask associated with it,
549 * propagate it down to the children.
551 if (lchip->dev->dma_mask) {
552 dev->dma_mask = *lchip->dev->dma_mask;
553 dev->dev.dma_mask = &dev->dma_mask;
556 dev->devid = info->devid;
557 dev->dev.parent = lchip->dev;
558 dev->dev.bus = &locomo_bus_type;
559 dev->dev.release = locomo_dev_release;
560 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
563 dev->mapbase = lchip->base + info->offset;
566 dev->length = info->length;
568 memmove(dev->irq, info->irq, sizeof(dev->irq));
570 ret = device_register(&dev->dev);
580 struct locomo_save_data {
588 static int locomo_suspend(struct platform_device *dev, pm_message_t state)
590 struct locomo *lchip = platform_get_drvdata(dev);
591 struct locomo_save_data *save;
594 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
598 lchip->saved_state = save;
600 spin_lock_irqsave(&lchip->lock, flags);
602 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
603 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
604 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */
605 locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
606 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
607 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
608 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
609 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
610 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */
611 locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
613 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
614 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
615 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
617 if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
618 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
620 /* 18MHz already enabled, so no wait */
621 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
623 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
624 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
625 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
627 spin_unlock_irqrestore(&lchip->lock, flags);
632 static int locomo_resume(struct platform_device *dev)
634 struct locomo *lchip = platform_get_drvdata(dev);
635 struct locomo_save_data *save;
639 save = lchip->saved_state;
643 spin_lock_irqsave(&lchip->lock, flags);
645 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
646 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
647 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
648 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
649 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
651 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
652 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
654 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
655 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
657 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
658 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
660 spin_unlock_irqrestore(&lchip->lock, flags);
662 lchip->saved_state = NULL;
671 * locomo_probe - probe for a single LoCoMo chip.
672 * @phys_addr: physical address of device.
674 * Probe for a LoCoMo chip. This must be called
675 * before any other locomo-specific code.
678 * %-ENODEV device not found.
679 * %-EBUSY physical address already marked in-use.
683 __locomo_probe(struct device *me, struct resource *mem, int irq)
685 struct locomo *lchip;
687 int i, ret = -ENODEV;
689 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
693 spin_lock_init(&lchip->lock);
696 dev_set_drvdata(lchip->dev, lchip);
698 lchip->phys = mem->start;
702 * Map the whole region. This also maps the
703 * registers for our children.
705 lchip->base = ioremap(mem->start, PAGE_SIZE);
711 /* locomo initialize */
712 locomo_writel(0, lchip->base + LOCOMO_ICR);
714 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
717 locomo_writel(0, lchip->base + LOCOMO_GPO);
718 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
719 , lchip->base + LOCOMO_GPE);
720 locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
721 , lchip->base + LOCOMO_GPD);
722 locomo_writel(0, lchip->base + LOCOMO_GIE);
725 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
726 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
729 locomo_writel(0, lchip->base + LOCOMO_LTINT);
731 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
733 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
734 r = locomo_readl(lchip->base + LOCOMO_ASD);
736 locomo_writel(r, lchip->base + LOCOMO_ASD);
738 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
739 r = locomo_readl(lchip->base + LOCOMO_HSD);
741 locomo_writel(r, lchip->base + LOCOMO_HSD);
743 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
746 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
749 r = locomo_readl(lchip->base + LOCOMO_TADC);
751 locomo_writel(r, lchip->base + LOCOMO_TADC);
755 r = locomo_readl(lchip->base + LOCOMO_DAC);
756 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
757 locomo_writel(r, lchip->base + LOCOMO_DAC);
759 r = locomo_readl(lchip->base + LOCOMO_VER);
760 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
763 * The interrupt controller must be initialised before any
764 * other device to ensure that the interrupts are available.
766 if (lchip->irq != NO_IRQ)
767 locomo_setup_irq(lchip);
769 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
770 locomo_init_one_child(lchip, &locomo_devices[i]);
778 static int locomo_remove_child(struct device *dev, void *data)
780 device_unregister(dev);
784 static void __locomo_remove(struct locomo *lchip)
786 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
788 if (lchip->irq != NO_IRQ) {
789 set_irq_chained_handler(lchip->irq, NULL);
790 set_irq_data(lchip->irq, NULL);
793 iounmap(lchip->base);
797 static int locomo_probe(struct platform_device *dev)
799 struct resource *mem;
802 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
805 irq = platform_get_irq(dev, 0);
809 return __locomo_probe(&dev->dev, mem, irq);
812 static int locomo_remove(struct platform_device *dev)
814 struct locomo *lchip = platform_get_drvdata(dev);
817 __locomo_remove(lchip);
818 platform_set_drvdata(dev, NULL);
825 * Not sure if this should be on the system bus or not yet.
826 * We really want some way to register a system device at
827 * the per-machine level, and then have this driver pick
828 * up the registered devices.
830 static struct platform_driver locomo_device_driver = {
831 .probe = locomo_probe,
832 .remove = locomo_remove,
834 .suspend = locomo_suspend,
835 .resume = locomo_resume,
843 * Get the parent device driver (us) structure
844 * from a child function device
846 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
848 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
851 void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
853 struct locomo *lchip = dev_get_drvdata(dev);
860 spin_lock_irqsave(&lchip->lock, flags);
862 r = locomo_readl(lchip->base + LOCOMO_GPD);
867 locomo_writel(r, lchip->base + LOCOMO_GPD);
869 r = locomo_readl(lchip->base + LOCOMO_GPE);
874 locomo_writel(r, lchip->base + LOCOMO_GPE);
876 spin_unlock_irqrestore(&lchip->lock, flags);
879 int locomo_gpio_read_level(struct device *dev, unsigned int bits)
881 struct locomo *lchip = dev_get_drvdata(dev);
888 spin_lock_irqsave(&lchip->lock, flags);
889 ret = locomo_readl(lchip->base + LOCOMO_GPL);
890 spin_unlock_irqrestore(&lchip->lock, flags);
896 int locomo_gpio_read_output(struct device *dev, unsigned int bits)
898 struct locomo *lchip = dev_get_drvdata(dev);
905 spin_lock_irqsave(&lchip->lock, flags);
906 ret = locomo_readl(lchip->base + LOCOMO_GPO);
907 spin_unlock_irqrestore(&lchip->lock, flags);
913 void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set)
915 struct locomo *lchip = dev_get_drvdata(dev);
922 spin_lock_irqsave(&lchip->lock, flags);
924 r = locomo_readl(lchip->base + LOCOMO_GPO);
929 locomo_writel(r, lchip->base + LOCOMO_GPO);
931 spin_unlock_irqrestore(&lchip->lock, flags);
934 static void locomo_m62332_sendbit(void *mapbase, int bit)
938 r = locomo_readl(mapbase + LOCOMO_DAC);
939 r &= ~(LOCOMO_DAC_SCLOEB);
940 locomo_writel(r, mapbase + LOCOMO_DAC);
941 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
942 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
943 r = locomo_readl(mapbase + LOCOMO_DAC);
944 r &= ~(LOCOMO_DAC_SCLOEB);
945 locomo_writel(r, mapbase + LOCOMO_DAC);
946 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
947 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
950 r = locomo_readl(mapbase + LOCOMO_DAC);
951 r |= LOCOMO_DAC_SDAOEB;
952 locomo_writel(r, mapbase + LOCOMO_DAC);
953 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
955 r = locomo_readl(mapbase + LOCOMO_DAC);
956 r &= ~(LOCOMO_DAC_SDAOEB);
957 locomo_writel(r, mapbase + LOCOMO_DAC);
958 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
961 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
962 r = locomo_readl(mapbase + LOCOMO_DAC);
963 r |= LOCOMO_DAC_SCLOEB;
964 locomo_writel(r, mapbase + LOCOMO_DAC);
965 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
966 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
969 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
971 struct locomo *lchip = locomo_chip_driver(ldev);
975 void *mapbase = lchip->base;
978 spin_lock_irqsave(&lchip->lock, flags);
981 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
982 r = locomo_readl(mapbase + LOCOMO_DAC);
983 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
984 locomo_writel(r, mapbase + LOCOMO_DAC);
985 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
986 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
987 r = locomo_readl(mapbase + LOCOMO_DAC);
988 r &= ~(LOCOMO_DAC_SDAOEB);
989 locomo_writel(r, mapbase + LOCOMO_DAC);
990 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
991 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
993 /* Send slave address and W bit (LSB is W bit) */
994 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
995 for (i = 1; i <= 8; i++) {
996 locomo_m62332_sendbit(mapbase, data >> (8 - i));
1000 r = locomo_readl(mapbase + LOCOMO_DAC);
1001 r &= ~(LOCOMO_DAC_SCLOEB);
1002 locomo_writel(r, mapbase + LOCOMO_DAC);
1003 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1004 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1005 r = locomo_readl(mapbase + LOCOMO_DAC);
1006 r &= ~(LOCOMO_DAC_SDAOEB);
1007 locomo_writel(r, mapbase + LOCOMO_DAC);
1008 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1009 r = locomo_readl(mapbase + LOCOMO_DAC);
1010 r |= LOCOMO_DAC_SCLOEB;
1011 locomo_writel(r, mapbase + LOCOMO_DAC);
1012 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1013 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1014 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1015 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
1019 /* Send Sub address (LSB is channel select) */
1020 /* channel = 0 : ch1 select */
1021 /* = 1 : ch2 select */
1022 data = M62332_SUB_ADDR + channel;
1023 for (i = 1; i <= 8; i++) {
1024 locomo_m62332_sendbit(mapbase, data >> (8 - i));
1028 r = locomo_readl(mapbase + LOCOMO_DAC);
1029 r &= ~(LOCOMO_DAC_SCLOEB);
1030 locomo_writel(r, mapbase + LOCOMO_DAC);
1031 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1032 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1033 r = locomo_readl(mapbase + LOCOMO_DAC);
1034 r &= ~(LOCOMO_DAC_SDAOEB);
1035 locomo_writel(r, mapbase + LOCOMO_DAC);
1036 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1037 r = locomo_readl(mapbase + LOCOMO_DAC);
1038 r |= LOCOMO_DAC_SCLOEB;
1039 locomo_writel(r, mapbase + LOCOMO_DAC);
1040 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1041 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1042 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1043 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
1048 for (i = 1; i <= 8; i++) {
1049 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
1053 r = locomo_readl(mapbase + LOCOMO_DAC);
1054 r &= ~(LOCOMO_DAC_SCLOEB);
1055 locomo_writel(r, mapbase + LOCOMO_DAC);
1056 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1057 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1058 r = locomo_readl(mapbase + LOCOMO_DAC);
1059 r &= ~(LOCOMO_DAC_SDAOEB);
1060 locomo_writel(r, mapbase + LOCOMO_DAC);
1061 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1062 r = locomo_readl(mapbase + LOCOMO_DAC);
1063 r |= LOCOMO_DAC_SCLOEB;
1064 locomo_writel(r, mapbase + LOCOMO_DAC);
1065 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1066 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1067 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1068 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
1073 r = locomo_readl(mapbase + LOCOMO_DAC);
1074 r &= ~(LOCOMO_DAC_SCLOEB);
1075 locomo_writel(r, mapbase + LOCOMO_DAC);
1076 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1077 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1078 r = locomo_readl(mapbase + LOCOMO_DAC);
1079 r |= LOCOMO_DAC_SCLOEB;
1080 locomo_writel(r, mapbase + LOCOMO_DAC);
1081 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1082 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1083 r = locomo_readl(mapbase + LOCOMO_DAC);
1084 r |= LOCOMO_DAC_SDAOEB;
1085 locomo_writel(r, mapbase + LOCOMO_DAC);
1086 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1087 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1089 r = locomo_readl(mapbase + LOCOMO_DAC);
1090 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1091 locomo_writel(r, mapbase + LOCOMO_DAC);
1092 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1093 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1095 spin_unlock_irqrestore(&lchip->lock, flags);
1099 * Frontlight control
1102 static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
1104 void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
1106 unsigned long flags;
1107 struct locomo *lchip = locomo_chip_driver(dev);
1110 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
1112 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
1114 spin_lock_irqsave(&lchip->lock, flags);
1115 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1117 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
1118 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1119 spin_unlock_irqrestore(&lchip->lock, flags);
1123 * LoCoMo "Register Access Bus."
1125 * We model this as a regular bus type, and hang devices directly
1128 static int locomo_match(struct device *_dev, struct device_driver *_drv)
1130 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1131 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1133 return dev->devid == drv->devid;
1136 static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1138 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1139 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1142 if (drv && drv->suspend)
1143 ret = drv->suspend(ldev, state);
1147 static int locomo_bus_resume(struct device *dev)
1149 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1150 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1153 if (drv && drv->resume)
1154 ret = drv->resume(ldev);
1158 static int locomo_bus_probe(struct device *dev)
1160 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1161 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1165 ret = drv->probe(ldev);
1169 static int locomo_bus_remove(struct device *dev)
1171 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1172 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1176 ret = drv->remove(ldev);
1180 struct bus_type locomo_bus_type = {
1181 .name = "locomo-bus",
1182 .match = locomo_match,
1183 .probe = locomo_bus_probe,
1184 .remove = locomo_bus_remove,
1185 .suspend = locomo_bus_suspend,
1186 .resume = locomo_bus_resume,
1189 int locomo_driver_register(struct locomo_driver *driver)
1191 driver->drv.bus = &locomo_bus_type;
1192 return driver_register(&driver->drv);
1195 void locomo_driver_unregister(struct locomo_driver *driver)
1197 driver_unregister(&driver->drv);
1200 static int __init locomo_init(void)
1202 int ret = bus_register(&locomo_bus_type);
1204 platform_driver_register(&locomo_device_driver);
1208 static void __exit locomo_exit(void)
1210 platform_driver_unregister(&locomo_device_driver);
1211 bus_unregister(&locomo_bus_type);
1214 module_init(locomo_init);
1215 module_exit(locomo_exit);
1217 MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1218 MODULE_LICENSE("GPL");
1219 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1221 EXPORT_SYMBOL(locomo_driver_register);
1222 EXPORT_SYMBOL(locomo_driver_unregister);
1223 EXPORT_SYMBOL(locomo_gpio_set_dir);
1224 EXPORT_SYMBOL(locomo_gpio_read_level);
1225 EXPORT_SYMBOL(locomo_gpio_read_output);
1226 EXPORT_SYMBOL(locomo_gpio_write);
1227 EXPORT_SYMBOL(locomo_m62332_senddata);