forked from Minki/linux
[libata] ARM: add ixp4xx PATA driver
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alessandro Zummo
Jeff Garzik
parent
4adccf6f44
commit
0df0d0a0ea
@ -508,6 +508,16 @@ config PATA_PLATFORM
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config PATA_IXP4XX_CF
|
||||
tristate "IXP4XX Compact Flash support"
|
||||
depends on ARCH_IXP4XX
|
||||
help
|
||||
This option enables support for a Compact Flash connected on
|
||||
the ixp4xx expansion bus. This driver had been written for
|
||||
Loft/Avila boards in mind but can work with others.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
endif
|
||||
endmenu
|
||||
|
||||
|
||||
@ -55,6 +55,7 @@ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
|
||||
obj-$(CONFIG_PATA_WINBOND_VLB) += pata_winbond.o
|
||||
obj-$(CONFIG_PATA_SIS) += pata_sis.o
|
||||
obj-$(CONFIG_PATA_TRIFLEX) += pata_triflex.o
|
||||
obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
|
||||
obj-$(CONFIG_PATA_PLATFORM) += pata_platform.o
|
||||
# Should be last but one libata driver
|
||||
obj-$(CONFIG_ATA_GENERIC) += ata_generic.o
|
||||
|
||||
271
drivers/ata/pata_ixp4xx_cf.c
Normal file
271
drivers/ata/pata_ixp4xx_cf.c
Normal file
@ -0,0 +1,271 @@
|
||||
/*
|
||||
* ixp4xx PATA/Compact Flash driver
|
||||
* Copyright (c) 2006 Tower Technologies
|
||||
* Author: Alessandro Zummo <a.zummo@towertech.it>
|
||||
*
|
||||
* An ATA driver to handle a Compact Flash connected
|
||||
* to the ixp4xx expansion bus in TrueIDE mode. The CF
|
||||
* must have it chip selects connected to two CS lines
|
||||
* on the ixp4xx. The interrupt line is optional, if not
|
||||
* specified the driver will run in polling mode.
|
||||
*
|
||||
* 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/libata.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <scsi/scsi_host.h>
|
||||
|
||||
#define DRV_NAME "pata_ixp4xx_cf"
|
||||
#define DRV_VERSION "0.1.1"
|
||||
|
||||
static void ixp4xx_set_mode(struct ata_port *ap)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
||||
struct ata_device *dev = &ap->device[i];
|
||||
if (ata_dev_enabled(dev)) {
|
||||
dev->pio_mode = XFER_PIO_0;
|
||||
dev->xfer_mode = XFER_PIO_0;
|
||||
dev->xfer_shift = ATA_SHIFT_PIO;
|
||||
dev->flags |= ATA_DFLAG_PIO;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void ixp4xx_phy_reset(struct ata_port *ap)
|
||||
{
|
||||
ap->cbl = ATA_CBL_PATA40;
|
||||
ata_port_probe(ap);
|
||||
ata_bus_reset(ap);
|
||||
}
|
||||
|
||||
static void ixp4xx_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
|
||||
unsigned int buflen, int write_data)
|
||||
{
|
||||
unsigned int i;
|
||||
unsigned int words = buflen >> 1;
|
||||
u16 *buf16 = (u16 *) buf;
|
||||
struct ata_port *ap = adev->ap;
|
||||
void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
|
||||
struct ixp4xx_pata_data *data = ap->host->dev->platform_data;
|
||||
|
||||
/* set the expansion bus in 16bit mode and restore
|
||||
* 8 bit mode after the transaction.
|
||||
*/
|
||||
*data->cs0_cfg &= ~(0x01);
|
||||
udelay(100);
|
||||
|
||||
/* Transfer multiple of 2 bytes */
|
||||
if (write_data) {
|
||||
for (i = 0; i < words; i++)
|
||||
writew(buf16[i], mmio);
|
||||
} else {
|
||||
for (i = 0; i < words; i++)
|
||||
buf16[i] = readw(mmio);
|
||||
}
|
||||
|
||||
/* Transfer trailing 1 byte, if any. */
|
||||
if (unlikely(buflen & 0x01)) {
|
||||
u16 align_buf[1] = { 0 };
|
||||
unsigned char *trailing_buf = buf + buflen - 1;
|
||||
|
||||
if (write_data) {
|
||||
memcpy(align_buf, trailing_buf, 1);
|
||||
writew(align_buf[0], mmio);
|
||||
} else {
|
||||
align_buf[0] = readw(mmio);
|
||||
memcpy(trailing_buf, align_buf, 1);
|
||||
}
|
||||
}
|
||||
|
||||
udelay(100);
|
||||
*data->cs0_cfg |= 0x01;
|
||||
}
|
||||
|
||||
static void ixp4xx_irq_clear(struct ata_port *ap)
|
||||
{
|
||||
}
|
||||
|
||||
static void ixp4xx_host_stop (struct ata_host *host)
|
||||
{
|
||||
struct ixp4xx_pata_data *data = host->dev->platform_data;
|
||||
|
||||
iounmap(data->cs0);
|
||||
iounmap(data->cs1);
|
||||
}
|
||||
|
||||
static struct scsi_host_template ixp4xx_sht = {
|
||||
.module = THIS_MODULE,
|
||||
.name = DRV_NAME,
|
||||
.ioctl = ata_scsi_ioctl,
|
||||
.queuecommand = ata_scsi_queuecmd,
|
||||
.can_queue = ATA_DEF_QUEUE,
|
||||
.this_id = ATA_SHT_THIS_ID,
|
||||
.sg_tablesize = LIBATA_MAX_PRD,
|
||||
.max_sectors = ATA_MAX_SECTORS,
|
||||
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
|
||||
.emulated = ATA_SHT_EMULATED,
|
||||
.use_clustering = ATA_SHT_USE_CLUSTERING,
|
||||
.proc_name = DRV_NAME,
|
||||
.dma_boundary = ATA_DMA_BOUNDARY,
|
||||
.slave_configure = ata_scsi_slave_config,
|
||||
.bios_param = ata_std_bios_param,
|
||||
};
|
||||
|
||||
static struct ata_port_operations ixp4xx_port_ops = {
|
||||
.set_mode = ixp4xx_set_mode,
|
||||
.mode_filter = ata_pci_default_filter,
|
||||
|
||||
.port_disable = ata_port_disable,
|
||||
.tf_load = ata_tf_load,
|
||||
.tf_read = ata_tf_read,
|
||||
.check_status = ata_check_status,
|
||||
.exec_command = ata_exec_command,
|
||||
.dev_select = ata_std_dev_select,
|
||||
|
||||
.qc_prep = ata_qc_prep,
|
||||
.qc_issue = ata_qc_issue_prot,
|
||||
.eng_timeout = ata_eng_timeout,
|
||||
.data_xfer = ixp4xx_mmio_data_xfer,
|
||||
|
||||
.irq_handler = ata_interrupt,
|
||||
.irq_clear = ixp4xx_irq_clear,
|
||||
|
||||
.port_start = ata_port_start,
|
||||
.port_stop = ata_port_stop,
|
||||
.host_stop = ixp4xx_host_stop,
|
||||
|
||||
.phy_reset = ixp4xx_phy_reset,
|
||||
};
|
||||
|
||||
static void ixp4xx_setup_port(struct ata_ioports *ioaddr,
|
||||
struct ixp4xx_pata_data *data)
|
||||
{
|
||||
ioaddr->cmd_addr = (unsigned long) data->cs0;
|
||||
ioaddr->altstatus_addr = (unsigned long) data->cs1 + 0x06;
|
||||
ioaddr->ctl_addr = (unsigned long) data->cs1 + 0x06;
|
||||
|
||||
ata_std_ports(ioaddr);
|
||||
|
||||
#ifndef __ARMEB__
|
||||
|
||||
/* adjust the addresses to handle the address swizzling of the
|
||||
* ixp4xx in little endian mode.
|
||||
*/
|
||||
|
||||
ioaddr->data_addr ^= 0x02;
|
||||
ioaddr->cmd_addr ^= 0x03;
|
||||
ioaddr->altstatus_addr ^= 0x03;
|
||||
ioaddr->ctl_addr ^= 0x03;
|
||||
ioaddr->error_addr ^= 0x03;
|
||||
ioaddr->feature_addr ^= 0x03;
|
||||
ioaddr->nsect_addr ^= 0x03;
|
||||
ioaddr->lbal_addr ^= 0x03;
|
||||
ioaddr->lbam_addr ^= 0x03;
|
||||
ioaddr->lbah_addr ^= 0x03;
|
||||
ioaddr->device_addr ^= 0x03;
|
||||
ioaddr->status_addr ^= 0x03;
|
||||
ioaddr->command_addr ^= 0x03;
|
||||
#endif
|
||||
}
|
||||
|
||||
static __devinit int ixp4xx_pata_probe(struct platform_device *pdev)
|
||||
{
|
||||
int ret;
|
||||
unsigned int irq;
|
||||
struct resource *cs0, *cs1;
|
||||
struct ata_probe_ent ae;
|
||||
|
||||
struct ixp4xx_pata_data *data = pdev->dev.platform_data;
|
||||
|
||||
cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
||||
|
||||
if (!cs0 || !cs1)
|
||||
return -EINVAL;
|
||||
|
||||
pdev->dev.coherent_dma_mask = DMA_32BIT_MASK;
|
||||
|
||||
data->cs0 = ioremap(cs0->start, 0x1000);
|
||||
data->cs1 = ioremap(cs1->start, 0x1000);
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq)
|
||||
set_irq_type(irq, IRQT_HIGH);
|
||||
|
||||
/* Setup expansion bus chip selects */
|
||||
*data->cs0_cfg = data->cs0_bits;
|
||||
*data->cs1_cfg = data->cs1_bits;
|
||||
|
||||
memset(&ae, 0, sizeof(struct ata_probe_ent));
|
||||
INIT_LIST_HEAD(&ae.node);
|
||||
|
||||
ae.dev = &pdev->dev;
|
||||
ae.port_ops = &ixp4xx_port_ops;
|
||||
ae.sht = &ixp4xx_sht;
|
||||
ae.n_ports = 1;
|
||||
ae.pio_mask = 0x1f; /* PIO4 */
|
||||
ae.irq = irq;
|
||||
ae.irq_flags = 0;
|
||||
ae.port_flags = ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY
|
||||
| ATA_FLAG_NO_ATAPI | ATA_FLAG_SRST;
|
||||
|
||||
/* run in polling mode if no irq has been assigned */
|
||||
if (!irq)
|
||||
ae.port_flags |= ATA_FLAG_PIO_POLLING;
|
||||
|
||||
ixp4xx_setup_port(&ae.port[0], data);
|
||||
|
||||
dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
|
||||
|
||||
ret = ata_device_add(&ae);
|
||||
if (ret == 0)
|
||||
return -ENODEV;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __devexit int ixp4xx_pata_remove(struct platform_device *dev)
|
||||
{
|
||||
struct ata_host *host = platform_get_drvdata(dev);
|
||||
|
||||
ata_host_remove(host);
|
||||
platform_set_drvdata(dev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver ixp4xx_pata_platform_driver = {
|
||||
.driver = {
|
||||
.name = DRV_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = ixp4xx_pata_probe,
|
||||
.remove = __devexit_p(ixp4xx_pata_remove),
|
||||
};
|
||||
|
||||
static int __init ixp4xx_pata_init(void)
|
||||
{
|
||||
return platform_driver_register(&ixp4xx_pata_platform_driver);
|
||||
}
|
||||
|
||||
static void __exit ixp4xx_pata_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&ixp4xx_pata_platform_driver);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
|
||||
MODULE_DESCRIPTION("low-level driver for ixp4xx Compact Flash PATA");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_VERSION(DRV_VERSION);
|
||||
|
||||
module_init(ixp4xx_pata_init);
|
||||
module_exit(ixp4xx_pata_exit);
|
||||
@ -86,6 +86,19 @@ struct ixp4xx_i2c_pins {
|
||||
unsigned long scl_pin;
|
||||
};
|
||||
|
||||
/*
|
||||
* This structure provide a means for the board setup code
|
||||
* to give information to th pata_ixp4xx driver. It is
|
||||
* passed as platform_data.
|
||||
*/
|
||||
struct ixp4xx_pata_data {
|
||||
volatile u32 *cs0_cfg;
|
||||
volatile u32 *cs1_cfg;
|
||||
unsigned long cs0_bits;
|
||||
unsigned long cs1_bits;
|
||||
void __iomem *cs0;
|
||||
void __iomem *cs1;
|
||||
};
|
||||
|
||||
struct sys_timer;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user