mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* drivers/ata/pata_palmld.c
|
|
*
|
|
* Driver for IDE channel in Palm LifeDrive
|
|
*
|
|
* Based on research of:
|
|
* Alex Osborne <ato@meshy.org>
|
|
*
|
|
* Rewrite for mainline:
|
|
* Marek Vasut <marek.vasut@gmail.com>
|
|
*
|
|
* Rewritten version based on pata_ixp4xx_cf.c:
|
|
* ixp4xx PATA/Compact Flash driver
|
|
* Copyright (C) 2006-07 Tower Technologies
|
|
* Author: Alessandro Zummo <a.zummo@towertech.it>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/libata.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
#include <scsi/scsi_host.h>
|
|
#include <mach/palmld.h>
|
|
|
|
#define DRV_NAME "pata_palmld"
|
|
|
|
struct palmld_pata {
|
|
struct ata_host *host;
|
|
struct gpio_desc *power;
|
|
struct gpio_desc *reset;
|
|
};
|
|
|
|
static struct scsi_host_template palmld_sht = {
|
|
ATA_PIO_SHT(DRV_NAME),
|
|
};
|
|
|
|
static struct ata_port_operations palmld_port_ops = {
|
|
.inherits = &ata_sff_port_ops,
|
|
.sff_data_xfer = ata_sff_data_xfer32,
|
|
.cable_detect = ata_cable_40wire,
|
|
};
|
|
|
|
static int palmld_pata_probe(struct platform_device *pdev)
|
|
{
|
|
struct palmld_pata *lda;
|
|
struct ata_port *ap;
|
|
void __iomem *mem;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
|
|
if (!lda)
|
|
return -ENOMEM;
|
|
|
|
/* allocate host */
|
|
lda->host = ata_host_alloc(dev, 1);
|
|
if (!lda->host)
|
|
return -ENOMEM;
|
|
|
|
/* remap drive's physical memory address */
|
|
mem = devm_ioremap(dev, PALMLD_IDE_PHYS, 0x1000);
|
|
if (!mem)
|
|
return -ENOMEM;
|
|
|
|
/* request and activate power and reset GPIOs */
|
|
lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
|
|
if (IS_ERR(lda->power))
|
|
return PTR_ERR(lda->power);
|
|
lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
|
|
if (IS_ERR(lda->reset)) {
|
|
gpiod_set_value(lda->power, 0);
|
|
return PTR_ERR(lda->reset);
|
|
}
|
|
|
|
/* Assert reset to reset the drive */
|
|
gpiod_set_value(lda->reset, 1);
|
|
msleep(30);
|
|
gpiod_set_value(lda->reset, 0);
|
|
msleep(30);
|
|
|
|
/* setup the ata port */
|
|
ap = lda->host->ports[0];
|
|
ap->ops = &palmld_port_ops;
|
|
ap->pio_mask = ATA_PIO4;
|
|
ap->flags |= ATA_FLAG_PIO_POLLING;
|
|
|
|
/* memory mapping voodoo */
|
|
ap->ioaddr.cmd_addr = mem + 0x10;
|
|
ap->ioaddr.altstatus_addr = mem + 0xe;
|
|
ap->ioaddr.ctl_addr = mem + 0xe;
|
|
|
|
/* start the port */
|
|
ata_sff_std_ports(&ap->ioaddr);
|
|
|
|
/* activate host */
|
|
ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
|
|
&palmld_sht);
|
|
/* power down on failure */
|
|
if (ret) {
|
|
gpiod_set_value(lda->power, 0);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, lda);
|
|
return 0;
|
|
}
|
|
|
|
static int palmld_pata_remove(struct platform_device *pdev)
|
|
{
|
|
struct palmld_pata *lda = platform_get_drvdata(pdev);
|
|
|
|
ata_platform_remove_one(pdev);
|
|
|
|
/* power down the HDD */
|
|
gpiod_set_value(lda->power, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver palmld_pata_platform_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
.probe = palmld_pata_probe,
|
|
.remove = palmld_pata_remove,
|
|
};
|
|
|
|
module_platform_driver(palmld_pata_platform_driver);
|
|
|
|
MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
|
|
MODULE_DESCRIPTION("PalmLD PATA driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|