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 */
65 struct locomo_dev_info {
73 /* All the locomo devices. If offset is non-zero, the mapbase for the
74 * locomo_dev will be set to the chip base plus offset. If offset is
75 * zero, then the mapbase for the locomo_dev will be set to zero. An
76 * offset of zero means the device only uses GPIOs or other helper
77 * functions inside this file */
78 static struct locomo_dev_info locomo_devices[] = {
80 .devid = LOCOMO_DEVID_KEYBOARD,
84 .name = "locomo-keyboard",
85 .offset = LOCOMO_KEYBOARD,
89 .devid = LOCOMO_DEVID_FRONTLIGHT,
91 .name = "locomo-frontlight",
92 .offset = LOCOMO_FRONTLIGHT,
97 .devid = LOCOMO_DEVID_BACKLIGHT,
99 .name = "locomo-backlight",
100 .offset = LOCOMO_BACKLIGHT,
104 .devid = LOCOMO_DEVID_AUDIO,
106 .name = "locomo-audio",
107 .offset = LOCOMO_AUDIO,
111 .devid = LOCOMO_DEVID_LED,
113 .name = "locomo-led",
114 .offset = LOCOMO_LED,
118 .devid = LOCOMO_DEVID_UART,
120 .name = "locomo-uart",
125 .devid = LOCOMO_DEVID_SPI,
127 .name = "locomo-spi",
128 .offset = LOCOMO_SPI,
134 /** LoCoMo interrupt handling stuff.
135 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
136 * that is, there is only one real hardware interrupt
137 * we determine which interrupt it is by reading some IO memory.
138 * We have two levels of expansion, first in the handler for the
139 * hardware interrupt we generate an interrupt
140 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
142 * hardware irq reads LOCOMO_ICR & 0x0f00
143 * IRQ_LOCOMO_KEY_BASE
144 * IRQ_LOCOMO_GPIO_BASE
146 * IRQ_LOCOMO_SPI_BASE
147 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
149 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
150 * IRQ_LOCOMO_GPIO[0-15]
151 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
153 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
156 * IRQ_LOCOMO_SPI_OVRN
157 * IRQ_LOCOMO_SPI_TEND
160 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
161 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
162 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
163 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
164 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
166 static void locomo_handler(unsigned int irq, struct irqdesc *desc,
167 struct pt_regs *regs)
171 void __iomem *mapbase = get_irq_chipdata(irq);
173 /* Acknowledge the parent IRQ */
174 desc->chip->ack(irq);
176 /* check why this interrupt was generated */
177 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
180 /* generate the next interrupt(s) */
181 irq = LOCOMO_IRQ_START;
183 for (i = 0; i <= 3; i++, d++, irq++) {
184 if (req & (0x0100 << i)) {
185 desc_handle_irq(irq, d, regs);
192 static void locomo_ack_irq(unsigned int irq)
196 static void locomo_mask_irq(unsigned int irq)
198 void __iomem *mapbase = get_irq_chipdata(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_chipdata(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 irqdesc *desc,
222 struct pt_regs *regs)
225 void __iomem *mapbase = get_irq_chipdata(irq);
227 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
228 d = irq_desc + LOCOMO_IRQ_KEY_START;
229 desc_handle_irq(LOCOMO_IRQ_KEY_START, d, regs);
233 static void locomo_key_ack_irq(unsigned int irq)
235 void __iomem *mapbase = get_irq_chipdata(irq);
237 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
238 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
239 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
242 static void locomo_key_mask_irq(unsigned int irq)
244 void __iomem *mapbase = get_irq_chipdata(irq);
246 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
247 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
248 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
251 static void locomo_key_unmask_irq(unsigned int irq)
253 void __iomem *mapbase = get_irq_chipdata(irq);
255 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
256 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
257 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
260 static struct irq_chip locomo_key_chip = {
261 .name = "LOCOMO-key",
262 .ack = locomo_key_ack_irq,
263 .mask = locomo_key_mask_irq,
264 .unmask = locomo_key_unmask_irq,
267 static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc,
268 struct pt_regs *regs)
272 void __iomem *mapbase = get_irq_chipdata(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, regs);
289 static void locomo_gpio_ack_irq(unsigned int irq)
291 void __iomem *mapbase = get_irq_chipdata(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_chipdata(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_chipdata(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 struct irq_chip locomo_gpio_chip = {
325 .name = "LOCOMO-gpio",
326 .ack = locomo_gpio_ack_irq,
327 .mask = locomo_gpio_mask_irq,
328 .unmask = locomo_gpio_unmask_irq,
331 static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc,
332 struct pt_regs *regs)
335 void __iomem *mapbase = get_irq_chipdata(irq);
337 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
338 d = irq_desc + LOCOMO_IRQ_LT_START;
339 desc_handle_irq(LOCOMO_IRQ_LT_START, d, regs);
343 static void locomo_lt_ack_irq(unsigned int irq)
345 void __iomem *mapbase = get_irq_chipdata(irq);
347 r = locomo_readl(mapbase + LOCOMO_LTINT);
348 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
349 locomo_writel(r, mapbase + LOCOMO_LTINT);
352 static void locomo_lt_mask_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 void locomo_lt_unmask_irq(unsigned int irq)
363 void __iomem *mapbase = get_irq_chipdata(irq);
365 r = locomo_readl(mapbase + LOCOMO_LTINT);
366 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
367 locomo_writel(r, mapbase + LOCOMO_LTINT);
370 static struct irq_chip locomo_lt_chip = {
372 .ack = locomo_lt_ack_irq,
373 .mask = locomo_lt_mask_irq,
374 .unmask = locomo_lt_unmask_irq,
377 static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc,
378 struct pt_regs *regs)
382 void __iomem *mapbase = get_irq_chipdata(irq);
384 req = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIR) & 0x000F;
386 irq = LOCOMO_IRQ_SPI_START;
389 for (i = 0; i <= 3; i++, irq++, d++) {
390 if (req & (0x0001 << i)) {
391 desc_handle_irq(irq, d, regs);
397 static void locomo_spi_ack_irq(unsigned int irq)
399 void __iomem *mapbase = get_irq_chipdata(irq);
401 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
402 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
403 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
405 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
406 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
407 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIS);
409 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
410 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
411 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE);
414 static void locomo_spi_mask_irq(unsigned int irq)
416 void __iomem *mapbase = get_irq_chipdata(irq);
418 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
419 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
420 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
423 static void locomo_spi_unmask_irq(unsigned int irq)
425 void __iomem *mapbase = get_irq_chipdata(irq);
427 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
428 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
429 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE);
432 static struct irq_chip locomo_spi_chip = {
433 .name = "LOCOMO-spi",
434 .ack = locomo_spi_ack_irq,
435 .mask = locomo_spi_mask_irq,
436 .unmask = locomo_spi_unmask_irq,
439 static void locomo_setup_irq(struct locomo *lchip)
442 void __iomem *irqbase = lchip->base;
445 * Install handler for IRQ_LOCOMO_HW.
447 set_irq_type(lchip->irq, IRQT_FALLING);
448 set_irq_chipdata(lchip->irq, irqbase);
449 set_irq_chained_handler(lchip->irq, locomo_handler);
451 /* Install handlers for IRQ_LOCOMO_*_BASE */
452 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
453 set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase);
454 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
455 set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE);
457 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
458 set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase);
459 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
460 set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE);
462 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
463 set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase);
464 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
465 set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE);
467 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
468 set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase);
469 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
470 set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE);
472 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
473 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
474 set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase);
475 set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ);
476 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
478 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
479 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
480 set_irq_chip(irq, &locomo_gpio_chip);
481 set_irq_chipdata(irq, irqbase);
482 set_irq_handler(irq, do_edge_IRQ);
483 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
486 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
487 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
488 set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase);
489 set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ);
490 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
492 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
493 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) {
494 set_irq_chip(irq, &locomo_spi_chip);
495 set_irq_chipdata(irq, irqbase);
496 set_irq_handler(irq, do_edge_IRQ);
497 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
502 static void locomo_dev_release(struct device *_dev)
504 struct locomo_dev *dev = LOCOMO_DEV(_dev);
510 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
512 struct locomo_dev *dev;
515 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
521 strncpy(dev->dev.bus_id, info->name, sizeof(dev->dev.bus_id));
523 * If the parent device has a DMA mask associated with it,
524 * propagate it down to the children.
526 if (lchip->dev->dma_mask) {
527 dev->dma_mask = *lchip->dev->dma_mask;
528 dev->dev.dma_mask = &dev->dma_mask;
531 dev->devid = info->devid;
532 dev->dev.parent = lchip->dev;
533 dev->dev.bus = &locomo_bus_type;
534 dev->dev.release = locomo_dev_release;
535 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
538 dev->mapbase = lchip->base + info->offset;
541 dev->length = info->length;
543 memmove(dev->irq, info->irq, sizeof(dev->irq));
545 ret = device_register(&dev->dev);
555 struct locomo_save_data {
563 static int locomo_suspend(struct platform_device *dev, pm_message_t state)
565 struct locomo *lchip = platform_get_drvdata(dev);
566 struct locomo_save_data *save;
569 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
573 dev->dev.power.saved_state = (void *) save;
575 spin_lock_irqsave(&lchip->lock, flags);
577 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
578 locomo_writel(0x00, lchip->base + LOCOMO_GPO);
579 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */
580 locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
581 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
582 locomo_writel(0x00, lchip->base + LOCOMO_GPE);
583 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
584 locomo_writel(0x00, lchip->base + LOCOMO_ASD);
585 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */
586 locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD);
588 locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
589 locomo_writel(0x00, lchip->base + LOCOMO_DAC);
590 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
592 if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) )
593 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
595 /* 18MHz already enabled, so no wait */
596 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
598 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
599 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
600 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
602 spin_unlock_irqrestore(&lchip->lock, flags);
607 static int locomo_resume(struct platform_device *dev)
609 struct locomo *lchip = platform_get_drvdata(dev);
610 struct locomo_save_data *save;
614 save = (struct locomo_save_data *) dev->dev.power.saved_state;
618 spin_lock_irqsave(&lchip->lock, flags);
620 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
621 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT);
622 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
623 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
624 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD);
626 locomo_writel(0x00, lchip->base + LOCOMO_C32K);
627 locomo_writel(0x90, lchip->base + LOCOMO_TADC);
629 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
630 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
632 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
633 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
635 spin_unlock_irqrestore(&lchip->lock, flags);
644 * locomo_probe - probe for a single LoCoMo chip.
645 * @phys_addr: physical address of device.
647 * Probe for a LoCoMo chip. This must be called
648 * before any other locomo-specific code.
651 * %-ENODEV device not found.
652 * %-EBUSY physical address already marked in-use.
656 __locomo_probe(struct device *me, struct resource *mem, int irq)
658 struct locomo *lchip;
660 int i, ret = -ENODEV;
662 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
666 spin_lock_init(&lchip->lock);
669 dev_set_drvdata(lchip->dev, lchip);
671 lchip->phys = mem->start;
675 * Map the whole region. This also maps the
676 * registers for our children.
678 lchip->base = ioremap(mem->start, PAGE_SIZE);
684 /* locomo initialize */
685 locomo_writel(0, lchip->base + LOCOMO_ICR);
687 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
690 locomo_writel(0, lchip->base + LOCOMO_GPO);
691 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
692 , lchip->base + LOCOMO_GPE);
693 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
694 , lchip->base + LOCOMO_GPD);
695 locomo_writel(0, lchip->base + LOCOMO_GIE);
698 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
699 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
702 locomo_writel(0, lchip->base + LOCOMO_LTINT);
704 locomo_writel(0, lchip->base + LOCOMO_SPIIE);
706 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
707 r = locomo_readl(lchip->base + LOCOMO_ASD);
709 locomo_writel(r, lchip->base + LOCOMO_ASD);
711 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
712 r = locomo_readl(lchip->base + LOCOMO_HSD);
714 locomo_writel(r, lchip->base + LOCOMO_HSD);
716 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
719 locomo_writel(0x80, lchip->base + LOCOMO_TADC);
722 r = locomo_readl(lchip->base + LOCOMO_TADC);
724 locomo_writel(r, lchip->base + LOCOMO_TADC);
728 r = locomo_readl(lchip->base + LOCOMO_DAC);
729 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
730 locomo_writel(r, lchip->base + LOCOMO_DAC);
732 r = locomo_readl(lchip->base + LOCOMO_VER);
733 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
736 * The interrupt controller must be initialised before any
737 * other device to ensure that the interrupts are available.
739 if (lchip->irq != NO_IRQ)
740 locomo_setup_irq(lchip);
742 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
743 locomo_init_one_child(lchip, &locomo_devices[i]);
751 static int locomo_remove_child(struct device *dev, void *data)
753 device_unregister(dev);
757 static void __locomo_remove(struct locomo *lchip)
759 device_for_each_child(lchip->dev, NULL, locomo_remove_child);
761 if (lchip->irq != NO_IRQ) {
762 set_irq_chained_handler(lchip->irq, NULL);
763 set_irq_data(lchip->irq, NULL);
766 iounmap(lchip->base);
770 static int locomo_probe(struct platform_device *dev)
772 struct resource *mem;
775 mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
778 irq = platform_get_irq(dev, 0);
782 return __locomo_probe(&dev->dev, mem, irq);
785 static int locomo_remove(struct platform_device *dev)
787 struct locomo *lchip = platform_get_drvdata(dev);
790 __locomo_remove(lchip);
791 platform_set_drvdata(dev, NULL);
798 * Not sure if this should be on the system bus or not yet.
799 * We really want some way to register a system device at
800 * the per-machine level, and then have this driver pick
801 * up the registered devices.
803 static struct platform_driver locomo_device_driver = {
804 .probe = locomo_probe,
805 .remove = locomo_remove,
807 .suspend = locomo_suspend,
808 .resume = locomo_resume,
816 * Get the parent device driver (us) structure
817 * from a child function device
819 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
821 return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
824 void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
826 struct locomo *lchip = dev_get_drvdata(dev);
833 spin_lock_irqsave(&lchip->lock, flags);
835 r = locomo_readl(lchip->base + LOCOMO_GPD);
837 locomo_writel(r, lchip->base + LOCOMO_GPD);
839 r = locomo_readl(lchip->base + LOCOMO_GPE);
844 locomo_writel(r, lchip->base + LOCOMO_GPE);
846 spin_unlock_irqrestore(&lchip->lock, flags);
849 int locomo_gpio_read_level(struct device *dev, unsigned int bits)
851 struct locomo *lchip = dev_get_drvdata(dev);
858 spin_lock_irqsave(&lchip->lock, flags);
859 ret = locomo_readl(lchip->base + LOCOMO_GPL);
860 spin_unlock_irqrestore(&lchip->lock, flags);
866 int locomo_gpio_read_output(struct device *dev, unsigned int bits)
868 struct locomo *lchip = dev_get_drvdata(dev);
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 device *dev, unsigned int bits, unsigned int set)
885 struct locomo *lchip = dev_get_drvdata(dev);
892 spin_lock_irqsave(&lchip->lock, flags);
894 r = locomo_readl(lchip->base + LOCOMO_GPO);
899 locomo_writel(r, lchip->base + LOCOMO_GPO);
901 spin_unlock_irqrestore(&lchip->lock, flags);
904 static void locomo_m62332_sendbit(void *mapbase, int bit)
908 r = locomo_readl(mapbase + LOCOMO_DAC);
909 r &= ~(LOCOMO_DAC_SCLOEB);
910 locomo_writel(r, mapbase + LOCOMO_DAC);
911 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
912 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
913 r = locomo_readl(mapbase + LOCOMO_DAC);
914 r &= ~(LOCOMO_DAC_SCLOEB);
915 locomo_writel(r, mapbase + LOCOMO_DAC);
916 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
917 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
920 r = locomo_readl(mapbase + LOCOMO_DAC);
921 r |= LOCOMO_DAC_SDAOEB;
922 locomo_writel(r, mapbase + LOCOMO_DAC);
923 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
925 r = locomo_readl(mapbase + LOCOMO_DAC);
926 r &= ~(LOCOMO_DAC_SDAOEB);
927 locomo_writel(r, mapbase + LOCOMO_DAC);
928 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
931 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
932 r = locomo_readl(mapbase + LOCOMO_DAC);
933 r |= LOCOMO_DAC_SCLOEB;
934 locomo_writel(r, mapbase + LOCOMO_DAC);
935 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
936 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
939 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
941 struct locomo *lchip = locomo_chip_driver(ldev);
945 void *mapbase = lchip->base;
948 spin_lock_irqsave(&lchip->lock, flags);
951 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
952 r = locomo_readl(mapbase + LOCOMO_DAC);
953 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
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 */
957 r = locomo_readl(mapbase + LOCOMO_DAC);
958 r &= ~(LOCOMO_DAC_SDAOEB);
959 locomo_writel(r, mapbase + LOCOMO_DAC);
960 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
961 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
963 /* Send slave address and W bit (LSB is W bit) */
964 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
965 for (i = 1; i <= 8; i++) {
966 locomo_m62332_sendbit(mapbase, data >> (8 - i));
970 r = locomo_readl(mapbase + LOCOMO_DAC);
971 r &= ~(LOCOMO_DAC_SCLOEB);
972 locomo_writel(r, mapbase + LOCOMO_DAC);
973 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
974 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
975 r = locomo_readl(mapbase + LOCOMO_DAC);
976 r &= ~(LOCOMO_DAC_SDAOEB);
977 locomo_writel(r, mapbase + LOCOMO_DAC);
978 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
979 r = locomo_readl(mapbase + LOCOMO_DAC);
980 r |= LOCOMO_DAC_SCLOEB;
981 locomo_writel(r, mapbase + LOCOMO_DAC);
982 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
983 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
984 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
985 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
989 /* Send Sub address (LSB is channel select) */
990 /* channel = 0 : ch1 select */
991 /* = 1 : ch2 select */
992 data = M62332_SUB_ADDR + channel;
993 for (i = 1; i <= 8; i++) {
994 locomo_m62332_sendbit(mapbase, data >> (8 - i));
998 r = locomo_readl(mapbase + LOCOMO_DAC);
999 r &= ~(LOCOMO_DAC_SCLOEB);
1000 locomo_writel(r, mapbase + LOCOMO_DAC);
1001 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1002 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1003 r = locomo_readl(mapbase + LOCOMO_DAC);
1004 r &= ~(LOCOMO_DAC_SDAOEB);
1005 locomo_writel(r, mapbase + LOCOMO_DAC);
1006 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1007 r = locomo_readl(mapbase + LOCOMO_DAC);
1008 r |= LOCOMO_DAC_SCLOEB;
1009 locomo_writel(r, mapbase + LOCOMO_DAC);
1010 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1011 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1012 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1013 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
1018 for (i = 1; i <= 8; i++) {
1019 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
1023 r = locomo_readl(mapbase + LOCOMO_DAC);
1024 r &= ~(LOCOMO_DAC_SCLOEB);
1025 locomo_writel(r, mapbase + LOCOMO_DAC);
1026 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1027 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1028 r = locomo_readl(mapbase + LOCOMO_DAC);
1029 r &= ~(LOCOMO_DAC_SDAOEB);
1030 locomo_writel(r, mapbase + LOCOMO_DAC);
1031 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
1032 r = locomo_readl(mapbase + LOCOMO_DAC);
1033 r |= LOCOMO_DAC_SCLOEB;
1034 locomo_writel(r, mapbase + LOCOMO_DAC);
1035 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1036 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
1037 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
1038 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
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_SCLOEB;
1050 locomo_writel(r, mapbase + LOCOMO_DAC);
1051 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1052 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1053 r = locomo_readl(mapbase + LOCOMO_DAC);
1054 r |= LOCOMO_DAC_SDAOEB;
1055 locomo_writel(r, mapbase + LOCOMO_DAC);
1056 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
1057 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
1059 r = locomo_readl(mapbase + LOCOMO_DAC);
1060 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
1061 locomo_writel(r, mapbase + LOCOMO_DAC);
1062 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
1063 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
1065 spin_unlock_irqrestore(&lchip->lock, flags);
1069 * Frontlight control
1072 static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
1074 void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
1076 unsigned long flags;
1077 struct locomo *lchip = locomo_chip_driver(dev);
1080 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
1082 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
1084 spin_lock_irqsave(&lchip->lock, flags);
1085 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1087 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
1088 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
1089 spin_unlock_irqrestore(&lchip->lock, flags);
1093 * LoCoMo "Register Access Bus."
1095 * We model this as a regular bus type, and hang devices directly
1098 static int locomo_match(struct device *_dev, struct device_driver *_drv)
1100 struct locomo_dev *dev = LOCOMO_DEV(_dev);
1101 struct locomo_driver *drv = LOCOMO_DRV(_drv);
1103 return dev->devid == drv->devid;
1106 static int locomo_bus_suspend(struct device *dev, pm_message_t state)
1108 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1109 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1112 if (drv && drv->suspend)
1113 ret = drv->suspend(ldev, state);
1117 static int locomo_bus_resume(struct device *dev)
1119 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1120 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1123 if (drv && drv->resume)
1124 ret = drv->resume(ldev);
1128 static int locomo_bus_probe(struct device *dev)
1130 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1131 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1135 ret = drv->probe(ldev);
1139 static int locomo_bus_remove(struct device *dev)
1141 struct locomo_dev *ldev = LOCOMO_DEV(dev);
1142 struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
1146 ret = drv->remove(ldev);
1150 struct bus_type locomo_bus_type = {
1151 .name = "locomo-bus",
1152 .match = locomo_match,
1153 .probe = locomo_bus_probe,
1154 .remove = locomo_bus_remove,
1155 .suspend = locomo_bus_suspend,
1156 .resume = locomo_bus_resume,
1159 int locomo_driver_register(struct locomo_driver *driver)
1161 driver->drv.bus = &locomo_bus_type;
1162 return driver_register(&driver->drv);
1165 void locomo_driver_unregister(struct locomo_driver *driver)
1167 driver_unregister(&driver->drv);
1170 static int __init locomo_init(void)
1172 int ret = bus_register(&locomo_bus_type);
1174 platform_driver_register(&locomo_device_driver);
1178 static void __exit locomo_exit(void)
1180 platform_driver_unregister(&locomo_device_driver);
1181 bus_unregister(&locomo_bus_type);
1184 module_init(locomo_init);
1185 module_exit(locomo_exit);
1187 MODULE_DESCRIPTION("Sharp LoCoMo core driver");
1188 MODULE_LICENSE("GPL");
1189 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
1191 EXPORT_SYMBOL(locomo_driver_register);
1192 EXPORT_SYMBOL(locomo_driver_unregister);
1193 EXPORT_SYMBOL(locomo_gpio_set_dir);
1194 EXPORT_SYMBOL(locomo_gpio_read_level);
1195 EXPORT_SYMBOL(locomo_gpio_read_output);
1196 EXPORT_SYMBOL(locomo_gpio_write);
1197 EXPORT_SYMBOL(locomo_m62332_senddata);