mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
[adm5120] add 2.6.26 specific files
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12239 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
268
target/linux/adm5120/files-2.6.26/drivers/ata/pata_rb153_cf.c
Normal file
268
target/linux/adm5120/files-2.6.26/drivers/ata/pata_rb153_cf.c
Normal file
@@ -0,0 +1,268 @@
|
||||
/*
|
||||
* 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);
|
||||
|
||||
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)) {
|
||||
set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW);
|
||||
if (!info->frozen)
|
||||
ata_sff_interrupt(irq, dev_instance);
|
||||
} else {
|
||||
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->flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO;
|
||||
|
||||
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 __devinit 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 __devexit 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 = __devexit_p(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);
|
||||
Reference in New Issue
Block a user