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* linux/arch/arm/common/locomo.c
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* This file contains all generic LoCoMo support.
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* All initialization functions provided here are intended to be called
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* from machine specific code with proper arguments when required.
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <mach/hardware.h>
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#include <asm/mach/irq.h>
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#include <asm/hardware/locomo.h>
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/* LoCoMo Interrupts */
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#define IRQ_LOCOMO_KEY (0)
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#define IRQ_LOCOMO_GPIO (1)
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#define IRQ_LOCOMO_LT (2)
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#define IRQ_LOCOMO_SPI (3)
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/* M62332 output channel selection */
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#define M62332_EVR_CH 1 /* M62332 volume channel number */
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/* 0 : CH.1 , 1 : CH. 2 */
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#define M62332_SLAVE_ADDR 0x4e /* Slave address */
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#define M62332_W_BIT 0x00 /* W bit (0 only) */
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#define M62332_SUB_ADDR 0x00 /* Sub address */
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#define M62332_A_BIT 0x00 /* A bit (0 only) */
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/* DAC setup and hold times (expressed in us) */
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#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
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#define DAC_START_SETUP_TIME 5 /* 4.7 us */
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#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
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#define DAC_START_HOLD_TIME 5 /* 4.7 us */
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#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
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#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
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#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
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#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
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#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
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#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
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/* the following is the overall data for the locomo chip */
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struct locomo_dev_info {
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/* All the locomo devices. If offset is non-zero, the mapbase for the
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* locomo_dev will be set to the chip base plus offset. If offset is
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* zero, then the mapbase for the locomo_dev will be set to zero. An
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* offset of zero means the device only uses GPIOs or other helper
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* functions inside this file */
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static struct locomo_dev_info locomo_devices[] = {
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.devid = LOCOMO_DEVID_KEYBOARD,
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.irq = { IRQ_LOCOMO_KEY },
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.name = "locomo-keyboard",
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.offset = LOCOMO_KEYBOARD,
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.devid = LOCOMO_DEVID_FRONTLIGHT,
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.name = "locomo-frontlight",
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.offset = LOCOMO_FRONTLIGHT,
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.devid = LOCOMO_DEVID_BACKLIGHT,
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.name = "locomo-backlight",
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.offset = LOCOMO_BACKLIGHT,
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.devid = LOCOMO_DEVID_AUDIO,
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.name = "locomo-audio",
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.offset = LOCOMO_AUDIO,
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.devid = LOCOMO_DEVID_LED,
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.name = "locomo-led",
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.offset = LOCOMO_LED,
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.devid = LOCOMO_DEVID_UART,
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.name = "locomo-uart",
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.devid = LOCOMO_DEVID_SPI,
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.name = "locomo-spi",
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.offset = LOCOMO_SPI,
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static void locomo_handler(unsigned int irq, struct irq_desc *desc)
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struct locomo *lchip = irq_get_chip_data(irq);
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/* Acknowledge the parent IRQ */
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desc->irq_data.chip->irq_ack(&desc->irq_data);
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/* check why this interrupt was generated */
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req = locomo_readl(lchip->base + LOCOMO_ICR) & 0x0f00;
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/* generate the next interrupt(s) */
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irq = lchip->irq_base;
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for (i = 0; i <= 3; i++, irq++) {
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if (req & (0x0100 << i)) {
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generic_handle_irq(irq);
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static void locomo_ack_irq(struct irq_data *d)
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static void locomo_mask_irq(struct irq_data *d)
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struct locomo *lchip = irq_data_get_irq_chip_data(d);
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r = locomo_readl(lchip->base + LOCOMO_ICR);
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r &= ~(0x0010 << (d->irq - lchip->irq_base));
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locomo_writel(r, lchip->base + LOCOMO_ICR);
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static void locomo_unmask_irq(struct irq_data *d)
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struct locomo *lchip = irq_data_get_irq_chip_data(d);
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r = locomo_readl(lchip->base + LOCOMO_ICR);
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r |= (0x0010 << (d->irq - lchip->irq_base));
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locomo_writel(r, lchip->base + LOCOMO_ICR);
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static struct irq_chip locomo_chip = {
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.irq_ack = locomo_ack_irq,
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.irq_mask = locomo_mask_irq,
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.irq_unmask = locomo_unmask_irq,
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static void locomo_setup_irq(struct locomo *lchip)
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int irq = lchip->irq_base;
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* Install handler for IRQ_LOCOMO_HW.
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irq_set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
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irq_set_chip_data(lchip->irq, lchip);
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irq_set_chained_handler(lchip->irq, locomo_handler);
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/* Install handlers for IRQ_LOCOMO_* */
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for ( ; irq <= lchip->irq_base + 3; irq++) {
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irq_set_chip_and_handler(irq, &locomo_chip, handle_level_irq);
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irq_set_chip_data(irq, lchip);
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set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
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static void locomo_dev_release(struct device *_dev)
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struct locomo_dev *dev = LOCOMO_DEV(_dev);
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locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
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struct locomo_dev *dev;
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dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
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* If the parent device has a DMA mask associated with it,
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* propagate it down to the children.
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if (lchip->dev->dma_mask) {
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dev->dma_mask = *lchip->dev->dma_mask;
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dev->dev.dma_mask = &dev->dma_mask;
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dev_set_name(&dev->dev, "%s", info->name);
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dev->devid = info->devid;
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dev->dev.parent = lchip->dev;
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dev->dev.bus = &locomo_bus_type;
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dev->dev.release = locomo_dev_release;
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dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
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dev->mapbase = lchip->base + info->offset;
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dev->length = info->length;
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dev->irq[0] = (lchip->irq_base == NO_IRQ) ?
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NO_IRQ : lchip->irq_base + info->irq[0];
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ret = device_register(&dev->dev);
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struct locomo_save_data {
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static int locomo_suspend(struct platform_device *dev, pm_message_t state)
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struct locomo *lchip = platform_get_drvdata(dev);
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struct locomo_save_data *save;
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save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
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lchip->saved_state = save;
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spin_lock_irqsave(&lchip->lock, flags);
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save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
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locomo_writel(0x00, lchip->base + LOCOMO_GPO);
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save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPICT); /* SPI */
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locomo_writel(0x40, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
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save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
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locomo_writel(0x00, lchip->base + LOCOMO_GPE);
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save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
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locomo_writel(0x00, lchip->base + LOCOMO_ASD);
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save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPI + LOCOMO_SPIMD); /* SPI */
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locomo_writel(0x3C14, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
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locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
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locomo_writel(0x00, lchip->base + LOCOMO_DAC);
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locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
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if ((locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
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locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
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/* 18MHz already enabled, so no wait */
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locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
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locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
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locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
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locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
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spin_unlock_irqrestore(&lchip->lock, flags);
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static int locomo_resume(struct platform_device *dev)
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struct locomo *lchip = platform_get_drvdata(dev);
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struct locomo_save_data *save;
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save = lchip->saved_state;
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spin_lock_irqsave(&lchip->lock, flags);
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locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
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locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPI + LOCOMO_SPICT);
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locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
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locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
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locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPI + LOCOMO_SPIMD);
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locomo_writel(0x00, lchip->base + LOCOMO_C32K);
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locomo_writel(0x90, lchip->base + LOCOMO_TADC);
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locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
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r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
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locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
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locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
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spin_unlock_irqrestore(&lchip->lock, flags);
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lchip->saved_state = NULL;
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* locomo_probe - probe for a single LoCoMo chip.
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* @phys_addr: physical address of device.
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* Probe for a LoCoMo chip. This must be called
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* before any other locomo-specific code.
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* %-ENODEV device not found.
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* %-EBUSY physical address already marked in-use.
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__locomo_probe(struct device *me, struct resource *mem, int irq)
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struct locomo_platform_data *pdata = me->platform_data;
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struct locomo *lchip;
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int i, ret = -ENODEV;
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lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
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spin_lock_init(&lchip->lock);
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dev_set_drvdata(lchip->dev, lchip);
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lchip->phys = mem->start;
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lchip->irq_base = (pdata) ? pdata->irq_base : NO_IRQ;
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* Map the whole region. This also maps the
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* registers for our children.
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lchip->base = ioremap(mem->start, PAGE_SIZE);
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/* locomo initialize */
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locomo_writel(0, lchip->base + LOCOMO_ICR);
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locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
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locomo_writel(0, lchip->base + LOCOMO_GPO);
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locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
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, lchip->base + LOCOMO_GPE);
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locomo_writel((LOCOMO_GPIO(1) | LOCOMO_GPIO(2) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
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, lchip->base + LOCOMO_GPD);
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locomo_writel(0, lchip->base + LOCOMO_GIE);
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locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
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locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
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locomo_writel(0, lchip->base + LOCOMO_LTINT);
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locomo_writel(0, lchip->base + LOCOMO_SPI + LOCOMO_SPIIE);
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locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
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r = locomo_readl(lchip->base + LOCOMO_ASD);
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locomo_writel(r, lchip->base + LOCOMO_ASD);
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locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
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r = locomo_readl(lchip->base + LOCOMO_HSD);
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locomo_writel(r, lchip->base + LOCOMO_HSD);
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locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
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locomo_writel(0x80, lchip->base + LOCOMO_TADC);
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r = locomo_readl(lchip->base + LOCOMO_TADC);
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locomo_writel(r, lchip->base + LOCOMO_TADC);
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r = locomo_readl(lchip->base + LOCOMO_DAC);
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r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
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locomo_writel(r, lchip->base + LOCOMO_DAC);
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r = locomo_readl(lchip->base + LOCOMO_VER);
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printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
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* The interrupt controller must be initialised before any
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* other device to ensure that the interrupts are available.
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if (lchip->irq != NO_IRQ && lchip->irq_base != NO_IRQ)
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locomo_setup_irq(lchip);
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for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
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locomo_init_one_child(lchip, &locomo_devices[i]);
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static int locomo_remove_child(struct device *dev, void *data)
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device_unregister(dev);
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static void __locomo_remove(struct locomo *lchip)
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device_for_each_child(lchip->dev, NULL, locomo_remove_child);
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if (lchip->irq != NO_IRQ) {
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irq_set_chained_handler(lchip->irq, NULL);
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irq_set_handler_data(lchip->irq, NULL);
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iounmap(lchip->base);
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static int locomo_probe(struct platform_device *dev)
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struct resource *mem;
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mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
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irq = platform_get_irq(dev, 0);
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return __locomo_probe(&dev->dev, mem, irq);
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static int locomo_remove(struct platform_device *dev)
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struct locomo *lchip = platform_get_drvdata(dev);
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__locomo_remove(lchip);
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platform_set_drvdata(dev, NULL);
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* Not sure if this should be on the system bus or not yet.
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* We really want some way to register a system device at
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* the per-machine level, and then have this driver pick
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* up the registered devices.
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static struct platform_driver locomo_device_driver = {
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.probe = locomo_probe,
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.remove = locomo_remove,
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.suspend = locomo_suspend,
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.resume = locomo_resume,
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* Get the parent device driver (us) structure
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* from a child function device
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static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
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return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
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void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir)
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struct locomo *lchip = dev_get_drvdata(dev);
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spin_lock_irqsave(&lchip->lock, flags);
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r = locomo_readl(lchip->base + LOCOMO_GPD);
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locomo_writel(r, lchip->base + LOCOMO_GPD);
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r = locomo_readl(lchip->base + LOCOMO_GPE);
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locomo_writel(r, lchip->base + LOCOMO_GPE);
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spin_unlock_irqrestore(&lchip->lock, flags);
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EXPORT_SYMBOL(locomo_gpio_set_dir);
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int locomo_gpio_read_level(struct device *dev, unsigned int bits)
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struct locomo *lchip = dev_get_drvdata(dev);
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spin_lock_irqsave(&lchip->lock, flags);
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ret = locomo_readl(lchip->base + LOCOMO_GPL);
580
spin_unlock_irqrestore(&lchip->lock, flags);
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EXPORT_SYMBOL(locomo_gpio_read_level);
587
int locomo_gpio_read_output(struct device *dev, unsigned int bits)
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struct locomo *lchip = dev_get_drvdata(dev);
596
spin_lock_irqsave(&lchip->lock, flags);
597
ret = locomo_readl(lchip->base + LOCOMO_GPO);
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spin_unlock_irqrestore(&lchip->lock, flags);
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EXPORT_SYMBOL(locomo_gpio_read_output);
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void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set)
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struct locomo *lchip = dev_get_drvdata(dev);
614
spin_lock_irqsave(&lchip->lock, flags);
616
r = locomo_readl(lchip->base + LOCOMO_GPO);
621
locomo_writel(r, lchip->base + LOCOMO_GPO);
623
spin_unlock_irqrestore(&lchip->lock, flags);
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EXPORT_SYMBOL(locomo_gpio_write);
627
static void locomo_m62332_sendbit(void *mapbase, int bit)
631
r = locomo_readl(mapbase + LOCOMO_DAC);
632
r &= ~(LOCOMO_DAC_SCLOEB);
633
locomo_writel(r, mapbase + LOCOMO_DAC);
634
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
635
udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
636
r = locomo_readl(mapbase + LOCOMO_DAC);
637
r &= ~(LOCOMO_DAC_SCLOEB);
638
locomo_writel(r, mapbase + LOCOMO_DAC);
639
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
640
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
643
r = locomo_readl(mapbase + LOCOMO_DAC);
644
r |= LOCOMO_DAC_SDAOEB;
645
locomo_writel(r, mapbase + LOCOMO_DAC);
646
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
648
r = locomo_readl(mapbase + LOCOMO_DAC);
649
r &= ~(LOCOMO_DAC_SDAOEB);
650
locomo_writel(r, mapbase + LOCOMO_DAC);
651
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
654
udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
655
r = locomo_readl(mapbase + LOCOMO_DAC);
656
r |= LOCOMO_DAC_SCLOEB;
657
locomo_writel(r, mapbase + LOCOMO_DAC);
658
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
659
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
662
void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
664
struct locomo *lchip = locomo_chip_driver(ldev);
668
void *mapbase = lchip->base;
671
spin_lock_irqsave(&lchip->lock, flags);
674
udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
675
r = locomo_readl(mapbase + LOCOMO_DAC);
676
r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
677
locomo_writel(r, mapbase + LOCOMO_DAC);
678
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
679
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
680
r = locomo_readl(mapbase + LOCOMO_DAC);
681
r &= ~(LOCOMO_DAC_SDAOEB);
682
locomo_writel(r, mapbase + LOCOMO_DAC);
683
udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
684
udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
686
/* Send slave address and W bit (LSB is W bit) */
687
data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
688
for (i = 1; i <= 8; i++) {
689
locomo_m62332_sendbit(mapbase, data >> (8 - i));
693
r = locomo_readl(mapbase + LOCOMO_DAC);
694
r &= ~(LOCOMO_DAC_SCLOEB);
695
locomo_writel(r, mapbase + LOCOMO_DAC);
696
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
697
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
698
r = locomo_readl(mapbase + LOCOMO_DAC);
699
r &= ~(LOCOMO_DAC_SDAOEB);
700
locomo_writel(r, mapbase + LOCOMO_DAC);
701
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
702
r = locomo_readl(mapbase + LOCOMO_DAC);
703
r |= LOCOMO_DAC_SCLOEB;
704
locomo_writel(r, mapbase + LOCOMO_DAC);
705
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
706
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
707
if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
708
printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
712
/* Send Sub address (LSB is channel select) */
713
/* channel = 0 : ch1 select */
714
/* = 1 : ch2 select */
715
data = M62332_SUB_ADDR + channel;
716
for (i = 1; i <= 8; i++) {
717
locomo_m62332_sendbit(mapbase, data >> (8 - i));
721
r = locomo_readl(mapbase + LOCOMO_DAC);
722
r &= ~(LOCOMO_DAC_SCLOEB);
723
locomo_writel(r, mapbase + LOCOMO_DAC);
724
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
725
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
726
r = locomo_readl(mapbase + LOCOMO_DAC);
727
r &= ~(LOCOMO_DAC_SDAOEB);
728
locomo_writel(r, mapbase + LOCOMO_DAC);
729
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
730
r = locomo_readl(mapbase + LOCOMO_DAC);
731
r |= LOCOMO_DAC_SCLOEB;
732
locomo_writel(r, mapbase + LOCOMO_DAC);
733
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
734
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
735
if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
736
printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
741
for (i = 1; i <= 8; i++) {
742
locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
746
r = locomo_readl(mapbase + LOCOMO_DAC);
747
r &= ~(LOCOMO_DAC_SCLOEB);
748
locomo_writel(r, mapbase + LOCOMO_DAC);
749
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
750
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
751
r = locomo_readl(mapbase + LOCOMO_DAC);
752
r &= ~(LOCOMO_DAC_SDAOEB);
753
locomo_writel(r, mapbase + LOCOMO_DAC);
754
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
755
r = locomo_readl(mapbase + LOCOMO_DAC);
756
r |= LOCOMO_DAC_SCLOEB;
757
locomo_writel(r, mapbase + LOCOMO_DAC);
758
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
759
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
760
if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
761
printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
766
r = locomo_readl(mapbase + LOCOMO_DAC);
767
r &= ~(LOCOMO_DAC_SCLOEB);
768
locomo_writel(r, mapbase + LOCOMO_DAC);
769
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
770
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
771
r = locomo_readl(mapbase + LOCOMO_DAC);
772
r |= LOCOMO_DAC_SCLOEB;
773
locomo_writel(r, mapbase + LOCOMO_DAC);
774
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
775
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
776
r = locomo_readl(mapbase + LOCOMO_DAC);
777
r |= LOCOMO_DAC_SDAOEB;
778
locomo_writel(r, mapbase + LOCOMO_DAC);
779
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
780
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
782
r = locomo_readl(mapbase + LOCOMO_DAC);
783
r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
784
locomo_writel(r, mapbase + LOCOMO_DAC);
785
udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
786
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
788
spin_unlock_irqrestore(&lchip->lock, flags);
790
EXPORT_SYMBOL(locomo_m62332_senddata);
796
void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
799
struct locomo *lchip = locomo_chip_driver(dev);
802
locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1);
804
locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
806
spin_lock_irqsave(&lchip->lock, flags);
807
locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
809
locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
810
locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
811
spin_unlock_irqrestore(&lchip->lock, flags);
813
EXPORT_SYMBOL(locomo_frontlight_set);
816
* LoCoMo "Register Access Bus."
818
* We model this as a regular bus type, and hang devices directly
821
static int locomo_match(struct device *_dev, struct device_driver *_drv)
823
struct locomo_dev *dev = LOCOMO_DEV(_dev);
824
struct locomo_driver *drv = LOCOMO_DRV(_drv);
826
return dev->devid == drv->devid;
829
static int locomo_bus_suspend(struct device *dev, pm_message_t state)
831
struct locomo_dev *ldev = LOCOMO_DEV(dev);
832
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
835
if (drv && drv->suspend)
836
ret = drv->suspend(ldev, state);
840
static int locomo_bus_resume(struct device *dev)
842
struct locomo_dev *ldev = LOCOMO_DEV(dev);
843
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
846
if (drv && drv->resume)
847
ret = drv->resume(ldev);
851
static int locomo_bus_probe(struct device *dev)
853
struct locomo_dev *ldev = LOCOMO_DEV(dev);
854
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
858
ret = drv->probe(ldev);
862
static int locomo_bus_remove(struct device *dev)
864
struct locomo_dev *ldev = LOCOMO_DEV(dev);
865
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
869
ret = drv->remove(ldev);
873
struct bus_type locomo_bus_type = {
874
.name = "locomo-bus",
875
.match = locomo_match,
876
.probe = locomo_bus_probe,
877
.remove = locomo_bus_remove,
878
.suspend = locomo_bus_suspend,
879
.resume = locomo_bus_resume,
882
int locomo_driver_register(struct locomo_driver *driver)
884
driver->drv.bus = &locomo_bus_type;
885
return driver_register(&driver->drv);
887
EXPORT_SYMBOL(locomo_driver_register);
889
void locomo_driver_unregister(struct locomo_driver *driver)
891
driver_unregister(&driver->drv);
893
EXPORT_SYMBOL(locomo_driver_unregister);
895
static int __init locomo_init(void)
897
int ret = bus_register(&locomo_bus_type);
899
platform_driver_register(&locomo_device_driver);
903
static void __exit locomo_exit(void)
905
platform_driver_unregister(&locomo_device_driver);
906
bus_unregister(&locomo_bus_type);
909
module_init(locomo_init);
910
module_exit(locomo_exit);
912
MODULE_DESCRIPTION("Sharp LoCoMo core driver");
913
MODULE_LICENSE("GPL");
914
MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");