+++ /dev/null
-/*
- * A low-level PATA driver to handle a Compact Flash connected on the
- * Mikrotik's RouterBoard 153 board.
- *
- * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
- *
- * This file was based on: drivers/ata/pata_ixp4xx_cf.c
- * Copyright (C) 2006-07 Tower Technologies
- * Author: Alessandro Zummo <a.zummo@towertech.it>
- *
- * Also was based on the driver for Linux 2.4.xx published by Mikrotik for
- * their RouterBoard 1xx and 5xx series devices. The original Mikrotik code
- * seems not to have a license.
- *
- * 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.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/gpio.h>
-#include <linux/platform_device.h>
-
-#include <linux/libata.h>
-#include <scsi/scsi_host.h>
-
-#define DRV_NAME "pata-rb153-cf"
-#define DRV_VERSION "0.5.0"
-#define DRV_DESC "PATA driver for RouterBOARD 153 Compact Flash"
-
-#define RB153_CF_MAXPORTS 1
-#define RB153_CF_IO_DELAY 100
-
-#define RB153_CF_REG_CMD 0x0800
-#define RB153_CF_REG_CTRL 0x080E
-#define RB153_CF_REG_DATA 0x0C00
-
-struct rb153_cf_info {
- void __iomem *iobase;
- unsigned int gpio_line;
- int frozen;
- unsigned int irq;
-};
-
-static inline void rb153_pata_finish_io(struct ata_port *ap)
-{
- struct rb153_cf_info *info = ap->host->private_data;
-
- /* FIXME: Keep previous delay. If this is merely a fence then
- * ata_sff_sync might be sufficient. */
- ata_sff_dma_pause(ap);
- ndelay(RB153_CF_IO_DELAY);
-
- irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH);
-}
-
-static void rb153_pata_exec_command(struct ata_port *ap,
- const struct ata_taskfile *tf)
-{
- writeb(tf->command, ap->ioaddr.command_addr);
- rb153_pata_finish_io(ap);
-}
-
-static unsigned int rb153_pata_data_xfer(struct ata_device *adev,
- unsigned char *buf,
- unsigned int buflen,
- int write_data)
-{
- void __iomem *ioaddr = adev->link->ap->ioaddr.data_addr;
- unsigned int t;
-
- t = buflen;
- if (write_data) {
- for (; t > 0; t--, buf++)
- writeb(*buf, ioaddr);
- } else {
- for (; t > 0; t--, buf++)
- *buf = readb(ioaddr);
- }
-
- rb153_pata_finish_io(adev->link->ap);
- return buflen;
-}
-
-static void rb153_pata_freeze(struct ata_port *ap)
-{
- struct rb153_cf_info *info = ap->host->private_data;
-
- info->frozen = 1;
-}
-
-static void rb153_pata_thaw(struct ata_port *ap)
-{
- struct rb153_cf_info *info = ap->host->private_data;
-
- info->frozen = 0;
-}
-
-static irqreturn_t rb153_pata_irq_handler(int irq, void *dev_instance)
-{
- struct ata_host *ah = dev_instance;
- struct rb153_cf_info *info = ah->private_data;
-
- if (gpio_get_value(info->gpio_line)) {
- irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW);
- if (!info->frozen)
- ata_sff_interrupt(irq, dev_instance);
- } else {
- irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH);
- }
-
- return IRQ_HANDLED;
-}
-
-static struct ata_port_operations rb153_pata_port_ops = {
- .inherits = &ata_sff_port_ops,
- .sff_exec_command = rb153_pata_exec_command,
- .sff_data_xfer = rb153_pata_data_xfer,
- .freeze = rb153_pata_freeze,
- .thaw = rb153_pata_thaw,
-};
-
-static struct scsi_host_template rb153_pata_sht = {
- ATA_PIO_SHT(DRV_NAME),
-};
-
-static void rb153_pata_setup_port(struct ata_host *ah)
-{
- struct rb153_cf_info *info = ah->private_data;
- struct ata_port *ap;
-
- ap = ah->ports[0];
-
- ap->ops = &rb153_pata_port_ops;
- ap->pio_mask = 0x1f; /* PIO4 */
-
- ap->ioaddr.cmd_addr = info->iobase + RB153_CF_REG_CMD;
- ap->ioaddr.ctl_addr = info->iobase + RB153_CF_REG_CTRL;
- ap->ioaddr.altstatus_addr = info->iobase + RB153_CF_REG_CTRL;
-
- ata_sff_std_ports(&ap->ioaddr);
-
- ap->ioaddr.data_addr = info->iobase + RB153_CF_REG_DATA;
-}
-
-static int rb153_pata_driver_probe(struct platform_device *pdev)
-{
- unsigned int irq;
- int gpio;
- struct resource *res;
- struct ata_host *ah;
- struct rb153_cf_info *info;
- int ret;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no IOMEM resource found\n");
- return -EINVAL;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
- dev_err(&pdev->dev, "no IRQ resource found\n");
- return -ENOENT;
- }
-
- gpio = irq_to_gpio(irq);
- if (gpio < 0) {
- dev_err(&pdev->dev, "no GPIO found for irq%d\n", irq);
- return -ENOENT;
- }
-
- ret = gpio_request(gpio, DRV_NAME);
- if (ret) {
- dev_err(&pdev->dev, "GPIO request failed\n");
- return ret;
- }
-
- ah = ata_host_alloc(&pdev->dev, RB153_CF_MAXPORTS);
- if (!ah)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, ah);
-
- info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- ah->private_data = info;
- info->gpio_line = gpio;
- info->irq = irq;
-
- info->iobase = devm_ioremap_nocache(&pdev->dev, res->start,
- res->end - res->start + 1);
- if (!info->iobase)
- return -ENOMEM;
-
- ret = gpio_direction_input(gpio);
- if (ret) {
- dev_err(&pdev->dev, "unable to set GPIO direction, err=%d\n",
- ret);
- goto err_free_gpio;
- }
-
- rb153_pata_setup_port(ah);
-
- ret = ata_host_activate(ah, irq, rb153_pata_irq_handler,
- IRQF_TRIGGER_LOW, &rb153_pata_sht);
- if (ret)
- goto err_free_gpio;
-
- return 0;
-
-err_free_gpio:
- gpio_free(gpio);
-
- return ret;
-}
-
-static int rb153_pata_driver_remove(struct platform_device *pdev)
-{
- struct ata_host *ah = platform_get_drvdata(pdev);
- struct rb153_cf_info *info = ah->private_data;
-
- ata_host_detach(ah);
- gpio_free(info->gpio_line);
-
- return 0;
-}
-
-static struct platform_driver rb153_pata_platform_driver = {
- .probe = rb153_pata_driver_probe,
- .remove = rb153_pata_driver_remove,
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-/* ------------------------------------------------------------------------ */
-
-#define DRV_INFO DRV_DESC " version " DRV_VERSION
-
-static int __init rb153_pata_module_init(void)
-{
- printk(KERN_INFO DRV_INFO "\n");
-
- return platform_driver_register(&rb153_pata_platform_driver);
-}
-
-static void __exit rb153_pata_module_exit(void)
-{
- platform_driver_unregister(&rb153_pata_platform_driver);
-}
-
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_DESCRIPTION(DRV_DESC);
-MODULE_VERSION(DRV_VERSION);
-MODULE_LICENSE("GPL v2");
-
-module_init(rb153_pata_module_init);
-module_exit(rb153_pata_module_exit);
projects / openwrt / svn-archive / archive.git / blobdiff