--- /dev/null
+/*
+ * 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 <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+#include <asm/hardware/locomo.h>
+
+/* the following is the overall data for the locomo chip */
+struct locomo {
+ struct device *dev;
+ unsigned long phys;
+ unsigned int irq;
+ void *base;
+};
+
+struct locomo_dev_info {
+ unsigned long offset;
+ unsigned long length;
+ unsigned int devid;
+ unsigned int irq[1];
+ const char * name;
+};
+
+static struct locomo_dev_info locomo_devices[] = {
+};
+
+
+/** 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_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_KIC);
+ r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
+ locomo_writel(r, mapbase + 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_KIC);
+ r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
+ locomo_writel(r, mapbase + 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_KIC);
+ r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
+ locomo_writel(r, mapbase + 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);
+
+ release_resource(&dev->res);
+ kfree(dev);
+}
+
+static int
+locomo_init_one_child(struct locomo *lchip, struct resource *parent,
+ 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;
+ dev->res.start = lchip->phys + info->offset;
+ dev->res.end = dev->res.start + info->length;
+ dev->res.name = dev->dev.bus_id;
+ dev->res.flags = IORESOURCE_MEM;
+ dev->mapbase = lchip->base + info->offset;
+ memmove(dev->irq, info->irq, sizeof(dev->irq));
+
+ if (info->length) {
+ ret = request_resource(parent, &dev->res);
+ if (ret) {
+ printk("LoCoMo: failed to allocate resource for %s\n",
+ dev->res.name);
+ goto out;
+ }
+ }
+
+ ret = device_register(&dev->dev);
+ if (ret) {
+ release_resource(&dev->res);
+ 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));
+
+ 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_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_ALS);
+ locomo_writel(0, lchip->base + 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, mem, &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 = NULL, *irq = NULL;
+ int i;
+
+ for (i = 0; i < pdev->num_resources; i++) {
+ if (pdev->resource[i].flags & IORESOURCE_MEM)
+ mem = &pdev->resource[i];
+ if (pdev->resource[i].flags & IORESOURCE_IRQ)
+ irq = &pdev->resource[i];
+ }
+
+ return __locomo_probe(dev, mem, irq ? irq->start : NO_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);
+
+ kfree(dev->saved_state);
+ dev->saved_state = 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);
+}
+
+/*
+ * 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, u32 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 <jelenz@students.wisc.edu>");
+
+EXPORT_SYMBOL(locomo_driver_register);
+EXPORT_SYMBOL(locomo_driver_unregister);
git://git.onelab.eu / linux-2.6.git / blobdiff