/* * linux/arch/arm/common/locomo.c * * Sharp LoCoMo support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This file contains all generic LoCoMo support. * * All initialization functions provided here are intended to be called * from machine specific code with proper arguments when required. * * Based on sa1111.c */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* M62332 output channel selection */ #define M62332_EVR_CH 1 /* M62332 volume channel number */ /* 0 : CH.1 , 1 : CH. 2 */ /* DAC send data */ #define M62332_SLAVE_ADDR 0x4e /* Slave address */ #define M62332_W_BIT 0x00 /* W bit (0 only) */ #define M62332_SUB_ADDR 0x00 /* Sub address */ #define M62332_A_BIT 0x00 /* A bit (0 only) */ /* DAC setup and hold times (expressed in us) */ #define DAC_BUS_FREE_TIME 5 /* 4.7 us */ #define DAC_START_SETUP_TIME 5 /* 4.7 us */ #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */ #define DAC_START_HOLD_TIME 5 /* 4.7 us */ #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */ #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */ #define DAC_DATA_SETUP_TIME 1 /* 250 ns */ #define DAC_DATA_HOLD_TIME 1 /* 300 ns */ #define DAC_LOW_SETUP_TIME 1 /* 300 ns */ #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */ /* the following is the overall data for the locomo chip */ struct locomo { struct device *dev; unsigned long phys; unsigned int irq; spinlock_t lock; void *base; }; struct locomo_dev_info { unsigned long offset; unsigned long length; unsigned int devid; unsigned int irq[1]; const char * name; }; /* All the locomo devices. If offset is non-zero, the mapbase for the * locomo_dev will be set to the chip base plus offset. If offset is * zero, then the mapbase for the locomo_dev will be set to zero. An * offset of zero means the device only uses GPIOs or other helper * functions inside this file */ static struct locomo_dev_info locomo_devices[] = { { .devid = LOCOMO_DEVID_KEYBOARD, .irq = { IRQ_LOCOMO_KEY, }, .name = "locomo-keyboard", .offset = LOCOMO_KEYBOARD, .length = 16, }, { .devid = LOCOMO_DEVID_FRONTLIGHT, .irq = {}, .name = "locomo-frontlight", .offset = LOCOMO_FRONTLIGHT, .length = 8, }, { .devid = LOCOMO_DEVID_BACKLIGHT, .irq = {}, .name = "locomo-backlight", .offset = LOCOMO_BACKLIGHT, .length = 8, }, { .devid = LOCOMO_DEVID_AUDIO, .irq = {}, .name = "locomo-audio", .offset = LOCOMO_AUDIO, .length = 4, }, { .devid = LOCOMO_DEVID_LED, .irq = {}, .name = "locomo-led", .offset = LOCOMO_LED, .length = 8, }, { .devid = LOCOMO_DEVID_UART, .irq = {}, .name = "locomo-uart", .offset = 0, .length = 0, }, }; /** LoCoMo interrupt handling stuff. * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs. * that is, there is only one real hardware interrupt * we determine which interrupt it is by reading some IO memory. * We have two levels of expansion, first in the handler for the * hardware interrupt we generate an interrupt * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts * * hardware irq reads LOCOMO_ICR & 0x0f00 * IRQ_LOCOMO_KEY_BASE * IRQ_LOCOMO_GPIO_BASE * IRQ_LOCOMO_LT_BASE * IRQ_LOCOMO_SPI_BASE * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001 * IRQ_LOCOMO_KEY * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff * IRQ_LOCOMO_GPIO[0-15] * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001 * IRQ_LOCOMO_LT * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F * IRQ_LOCOMO_SPI_RFR * IRQ_LOCOMO_SPI_RFW * IRQ_LOCOMO_SPI_OVRN * IRQ_LOCOMO_SPI_TEND */ #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE) #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY) #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0) #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT) #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR) static void locomo_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) { int req, i; struct irqdesc *d; void *mapbase = get_irq_chipdata(irq); /* Acknowledge the parent IRQ */ desc->chip->ack(irq); /* check why this interrupt was generated */ req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00; if (req) { /* generate the next interrupt(s) */ irq = LOCOMO_IRQ_START; d = irq_desc + irq; for (i = 0; i <= 3; i++, d++, irq++) { if (req & (0x0100 << i)) { d->handle(irq, d, regs); } } } } static void locomo_ack_irq(unsigned int irq) { } static void locomo_mask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_ICR); r &= ~(0x0010 << (irq - LOCOMO_IRQ_START)); locomo_writel(r, mapbase + LOCOMO_ICR); } static void locomo_unmask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_ICR); r |= (0x0010 << (irq - LOCOMO_IRQ_START)); locomo_writel(r, mapbase + LOCOMO_ICR); } static struct irqchip locomo_chip = { .ack = locomo_ack_irq, .mask = locomo_mask_irq, .unmask = locomo_unmask_irq, }; static void locomo_key_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) { struct irqdesc *d; void *mapbase = get_irq_chipdata(irq); if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) { d = irq_desc + LOCOMO_IRQ_KEY_START; d->handle(LOCOMO_IRQ_KEY_START, d, regs); } } static void locomo_key_ack_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START)); locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); } static void locomo_key_mask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START)); locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); } static void locomo_key_unmask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START)); locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); } static struct irqchip locomo_key_chip = { .ack = locomo_key_ack_irq, .mask = locomo_key_mask_irq, .unmask = locomo_key_unmask_irq, }; static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) { int req, i; struct irqdesc *d; void *mapbase = get_irq_chipdata(irq); req = locomo_readl(mapbase + LOCOMO_GIR) & locomo_readl(mapbase + LOCOMO_GPD) & 0xffff; if (req) { irq = LOCOMO_IRQ_GPIO_START; d = irq_desc + LOCOMO_IRQ_GPIO_START; for (i = 0; i <= 15; i++, irq++, d++) { if (req & (0x0001 << i)) { d->handle(irq, d, regs); } } } } static void locomo_gpio_ack_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_GWE); r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); locomo_writel(r, mapbase + LOCOMO_GWE); r = locomo_readl(mapbase + LOCOMO_GIS); r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); locomo_writel(r, mapbase + LOCOMO_GIS); r = locomo_readl(mapbase + LOCOMO_GWE); r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); locomo_writel(r, mapbase + LOCOMO_GWE); } static void locomo_gpio_mask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_GIE); r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); locomo_writel(r, mapbase + LOCOMO_GIE); } static void locomo_gpio_unmask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_GIE); r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); locomo_writel(r, mapbase + LOCOMO_GIE); } static struct irqchip locomo_gpio_chip = { .ack = locomo_gpio_ack_irq, .mask = locomo_gpio_mask_irq, .unmask = locomo_gpio_unmask_irq, }; static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) { struct irqdesc *d; void *mapbase = get_irq_chipdata(irq); if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) { d = irq_desc + LOCOMO_IRQ_LT_START; d->handle(LOCOMO_IRQ_LT_START, d, regs); } } static void locomo_lt_ack_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_LTINT); r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START)); locomo_writel(r, mapbase + LOCOMO_LTINT); } static void locomo_lt_mask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_LTINT); r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START)); locomo_writel(r, mapbase + LOCOMO_LTINT); } static void locomo_lt_unmask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_LTINT); r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START)); locomo_writel(r, mapbase + LOCOMO_LTINT); } static struct irqchip locomo_lt_chip = { .ack = locomo_lt_ack_irq, .mask = locomo_lt_mask_irq, .unmask = locomo_lt_unmask_irq, }; static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) { int req, i; struct irqdesc *d; void *mapbase = get_irq_chipdata(irq); req = locomo_readl(mapbase + LOCOMO_SPIIR) & 0x000F; if (req) { irq = LOCOMO_IRQ_SPI_START; d = irq_desc + irq; for (i = 0; i <= 3; i++, irq++, d++) { if (req & (0x0001 << i)) { d->handle(irq, d, regs); } } } } static void locomo_spi_ack_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_SPIWE); r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); locomo_writel(r, mapbase + LOCOMO_SPIWE); r = locomo_readl(mapbase + LOCOMO_SPIIS); r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); locomo_writel(r, mapbase + LOCOMO_SPIIS); r = locomo_readl(mapbase + LOCOMO_SPIWE); r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); locomo_writel(r, mapbase + LOCOMO_SPIWE); } static void locomo_spi_mask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_SPIIE); r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); locomo_writel(r, mapbase + LOCOMO_SPIIE); } static void locomo_spi_unmask_irq(unsigned int irq) { void *mapbase = get_irq_chipdata(irq); unsigned int r; r = locomo_readl(mapbase + LOCOMO_SPIIE); r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); locomo_writel(r, mapbase + LOCOMO_SPIIE); } static struct irqchip locomo_spi_chip = { .ack = locomo_spi_ack_irq, .mask = locomo_spi_mask_irq, .unmask = locomo_spi_unmask_irq, }; static void locomo_setup_irq(struct locomo *lchip) { int irq; void *irqbase = lchip->base; /* * Install handler for IRQ_LOCOMO_HW. */ set_irq_type(lchip->irq, IRQT_FALLING); set_irq_chipdata(lchip->irq, irqbase); set_irq_chained_handler(lchip->irq, locomo_handler); /* Install handlers for IRQ_LOCOMO_*_BASE */ set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip); set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase); set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler); set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE); set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip); set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase); set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler); set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE); set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip); set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase); set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler); set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE); set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip); set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase); set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler); set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE); /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */ set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip); set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase); set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ); set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE); /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */ for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) { set_irq_chip(irq, &locomo_gpio_chip); set_irq_chipdata(irq, irqbase); set_irq_handler(irq, do_edge_IRQ); set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); } /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */ set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip); set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase); set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ); set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE); /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */ for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) { set_irq_chip(irq, &locomo_spi_chip); set_irq_chipdata(irq, irqbase); set_irq_handler(irq, do_edge_IRQ); set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); } } static void locomo_dev_release(struct device *_dev) { struct locomo_dev *dev = LOCOMO_DEV(_dev); kfree(dev); } static int locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) { struct locomo_dev *dev; int ret; dev = kmalloc(sizeof(struct locomo_dev), GFP_KERNEL); if (!dev) { ret = -ENOMEM; goto out; } memset(dev, 0, sizeof(struct locomo_dev)); strncpy(dev->dev.bus_id,info->name,sizeof(dev->dev.bus_id)); /* * If the parent device has a DMA mask associated with it, * propagate it down to the children. */ if (lchip->dev->dma_mask) { dev->dma_mask = *lchip->dev->dma_mask; dev->dev.dma_mask = &dev->dma_mask; } dev->devid = info->devid; dev->dev.parent = lchip->dev; dev->dev.bus = &locomo_bus_type; dev->dev.release = locomo_dev_release; dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask; if (info->offset) dev->mapbase = lchip->base + info->offset; else dev->mapbase = 0; dev->length = info->length; memmove(dev->irq, info->irq, sizeof(dev->irq)); ret = device_register(&dev->dev); if (ret) { out: kfree(dev); } return ret; } /** * locomo_probe - probe for a single LoCoMo chip. * @phys_addr: physical address of device. * * Probe for a LoCoMo chip. This must be called * before any other locomo-specific code. * * Returns: * %-ENODEV device not found. * %-EBUSY physical address already marked in-use. * %0 successful. */ static int __locomo_probe(struct device *me, struct resource *mem, int irq) { struct locomo *lchip; unsigned long r; int i, ret = -ENODEV; lchip = kmalloc(sizeof(struct locomo), GFP_KERNEL); if (!lchip) return -ENOMEM; memset(lchip, 0, sizeof(struct locomo)); spin_lock_init(&lchip->lock); lchip->dev = me; dev_set_drvdata(lchip->dev, lchip); lchip->phys = mem->start; lchip->irq = irq; /* * Map the whole region. This also maps the * registers for our children. */ lchip->base = ioremap(mem->start, PAGE_SIZE); if (!lchip->base) { ret = -ENOMEM; goto out; } /* locomo initialize */ locomo_writel(0, lchip->base + LOCOMO_ICR); /* KEYBOARD */ locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); /* GPIO */ locomo_writel(0, lchip->base + LOCOMO_GPO); locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) , lchip->base + LOCOMO_GPE); locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) , lchip->base + LOCOMO_GPD); locomo_writel(0, lchip->base + LOCOMO_GIE); /* FrontLight */ locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); /* Longtime timer */ locomo_writel(0, lchip->base + LOCOMO_LTINT); /* SPI */ locomo_writel(0, lchip->base + LOCOMO_SPIIE); locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); r = locomo_readl(lchip->base + LOCOMO_ASD); r |= 0x8000; locomo_writel(r, lchip->base + LOCOMO_ASD); locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); r = locomo_readl(lchip->base + LOCOMO_HSD); r |= 0x8000; locomo_writel(r, lchip->base + LOCOMO_HSD); locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); /* XON */ locomo_writel(0x80, lchip->base + LOCOMO_TADC); udelay(1000); /* CLK9MEN */ r = locomo_readl(lchip->base + LOCOMO_TADC); r |= 0x10; locomo_writel(r, lchip->base + LOCOMO_TADC); udelay(100); /* init DAC */ r = locomo_readl(lchip->base + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; locomo_writel(r, lchip->base + LOCOMO_DAC); r = locomo_readl(lchip->base + LOCOMO_VER); printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); /* * The interrupt controller must be initialised before any * other device to ensure that the interrupts are available. */ if (lchip->irq != NO_IRQ) locomo_setup_irq(lchip); for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) locomo_init_one_child(lchip, &locomo_devices[i]); return 0; out: kfree(lchip); return ret; } static void __locomo_remove(struct locomo *lchip) { struct list_head *l, *n; list_for_each_safe(l, n, &lchip->dev->children) { struct device *d = list_to_dev(l); device_unregister(d); } if (lchip->irq != NO_IRQ) { set_irq_chained_handler(lchip->irq, NULL); set_irq_data(lchip->irq, NULL); } iounmap(lchip->base); kfree(lchip); } static int locomo_probe(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct resource *mem; int irq; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) return -EINVAL; irq = platform_get_irq(pdev, 0); return __locomo_probe(dev, mem, irq); } static int locomo_remove(struct device *dev) { struct locomo *lchip = dev_get_drvdata(dev); if (lchip) { __locomo_remove(lchip); dev_set_drvdata(dev, NULL); } return 0; } /* * Not sure if this should be on the system bus or not yet. * We really want some way to register a system device at * the per-machine level, and then have this driver pick * up the registered devices. */ static struct device_driver locomo_device_driver = { .name = "locomo", .bus = &platform_bus_type, .probe = locomo_probe, .remove = locomo_remove, }; /* * Get the parent device driver (us) structure * from a child function device */ static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) { return (struct locomo *)dev_get_drvdata(ldev->dev.parent); } void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir) { struct locomo *lchip = locomo_chip_driver(ldev); unsigned long flags; unsigned int r; spin_lock_irqsave(&lchip->lock, flags); r = locomo_readl(lchip->base + LOCOMO_GPD); r &= ~bits; locomo_writel(r, lchip->base + LOCOMO_GPD); r = locomo_readl(lchip->base + LOCOMO_GPE); if (dir) r |= bits; else r &= ~bits; locomo_writel(r, lchip->base + LOCOMO_GPE); spin_unlock_irqrestore(&lchip->lock, flags); } unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits) { struct locomo *lchip = locomo_chip_driver(ldev); unsigned long flags; unsigned int ret; spin_lock_irqsave(&lchip->lock, flags); ret = locomo_readl(lchip->base + LOCOMO_GPL); spin_unlock_irqrestore(&lchip->lock, flags); ret &= bits; return ret; } unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits) { struct locomo *lchip = locomo_chip_driver(ldev); unsigned long flags; unsigned int ret; spin_lock_irqsave(&lchip->lock, flags); ret = locomo_readl(lchip->base + LOCOMO_GPO); spin_unlock_irqrestore(&lchip->lock, flags); ret &= bits; return ret; } void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set) { struct locomo *lchip = locomo_chip_driver(ldev); unsigned long flags; unsigned int r; spin_lock_irqsave(&lchip->lock, flags); r = locomo_readl(lchip->base + LOCOMO_GPO); if (set) r |= bits; else r &= ~bits; locomo_writel(r, lchip->base + LOCOMO_GPO); spin_unlock_irqrestore(&lchip->lock, flags); } static void locomo_m62332_sendbit(void *mapbase, int bit) { unsigned int r; r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SCLOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SCLOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ if (bit & 1) { r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SDAOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ } else { r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SDAOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ } udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ } void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) { struct locomo *lchip = locomo_chip_driver(ldev); int i; unsigned char data; unsigned int r; void *mapbase = lchip->base; unsigned long flags; spin_lock_irqsave(&lchip->lock, flags); /* Start */ udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SDAOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ /* Send slave address and W bit (LSB is W bit) */ data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; for (i = 1; i <= 8; i++) { locomo_m62332_sendbit(mapbase, data >> (8 - i)); } /* Check A bit */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SCLOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SDAOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); return; } /* Send Sub address (LSB is channel select) */ /* channel = 0 : ch1 select */ /* = 1 : ch2 select */ data = M62332_SUB_ADDR + channel; for (i = 1; i <= 8; i++) { locomo_m62332_sendbit(mapbase, data >> (8 - i)); } /* Check A bit */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SCLOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SDAOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); return; } /* Send DAC data */ for (i = 1; i <= 8; i++) { locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); } /* Check A bit */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SCLOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SDAOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); return; } /* stop */ r = locomo_readl(mapbase + LOCOMO_DAC); r &= ~(LOCOMO_DAC_SCLOEB); locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SDAOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ r = locomo_readl(mapbase + LOCOMO_DAC); r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; locomo_writel(r, mapbase + LOCOMO_DAC); udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ spin_unlock_irqrestore(&lchip->lock, flags); } /* * LoCoMo "Register Access Bus." * * We model this as a regular bus type, and hang devices directly * off this. */ static int locomo_match(struct device *_dev, struct device_driver *_drv) { struct locomo_dev *dev = LOCOMO_DEV(_dev); struct locomo_driver *drv = LOCOMO_DRV(_drv); return dev->devid == drv->devid; } static int locomo_bus_suspend(struct device *dev, pm_message_t state) { struct locomo_dev *ldev = LOCOMO_DEV(dev); struct locomo_driver *drv = LOCOMO_DRV(dev->driver); int ret = 0; if (drv && drv->suspend) ret = drv->suspend(ldev, state); return ret; } static int locomo_bus_resume(struct device *dev) { struct locomo_dev *ldev = LOCOMO_DEV(dev); struct locomo_driver *drv = LOCOMO_DRV(dev->driver); int ret = 0; if (drv && drv->resume) ret = drv->resume(ldev); return ret; } static int locomo_bus_probe(struct device *dev) { struct locomo_dev *ldev = LOCOMO_DEV(dev); struct locomo_driver *drv = LOCOMO_DRV(dev->driver); int ret = -ENODEV; if (drv->probe) ret = drv->probe(ldev); return ret; } static int locomo_bus_remove(struct device *dev) { struct locomo_dev *ldev = LOCOMO_DEV(dev); struct locomo_driver *drv = LOCOMO_DRV(dev->driver); int ret = 0; if (drv->remove) ret = drv->remove(ldev); return ret; } struct bus_type locomo_bus_type = { .name = "locomo-bus", .match = locomo_match, .suspend = locomo_bus_suspend, .resume = locomo_bus_resume, }; int locomo_driver_register(struct locomo_driver *driver) { driver->drv.probe = locomo_bus_probe; driver->drv.remove = locomo_bus_remove; driver->drv.bus = &locomo_bus_type; return driver_register(&driver->drv); } void locomo_driver_unregister(struct locomo_driver *driver) { driver_unregister(&driver->drv); } static int __init locomo_init(void) { int ret = bus_register(&locomo_bus_type); if (ret == 0) driver_register(&locomo_device_driver); return ret; } static void __exit locomo_exit(void) { driver_unregister(&locomo_device_driver); bus_unregister(&locomo_bus_type); } module_init(locomo_init); module_exit(locomo_exit); MODULE_DESCRIPTION("Sharp LoCoMo core driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("John Lenz "); EXPORT_SYMBOL(locomo_driver_register); EXPORT_SYMBOL(locomo_driver_unregister); EXPORT_SYMBOL(locomo_gpio_set_dir); EXPORT_SYMBOL(locomo_gpio_read_level); EXPORT_SYMBOL(locomo_gpio_read_output); EXPORT_SYMBOL(locomo_gpio_write); EXPORT_SYMBOL(locomo_m62332_senddata);