diff options
Diffstat (limited to 'drivers/ata/pata_palmld.c')
| -rw-r--r-- | drivers/ata/pata_palmld.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c new file mode 100644 index 000000000..d071ab686 --- /dev/null +++ b/drivers/ata/pata_palmld.c @@ -0,0 +1,137 @@ +/* + * 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> + * + * 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 <linux/delay.h> +#include <linux/gpio.h> + +#include <scsi/scsi_host.h> +#include <mach/palmld.h> + +#define DRV_NAME "pata_palmld" + +static struct gpio palmld_hdd_gpios[] = { + { GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" }, + { GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD 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 ata_host *host; + struct ata_port *ap; + void __iomem *mem; + int ret; + + /* allocate host */ + host = ata_host_alloc(&pdev->dev, 1); + if (!host) { + ret = -ENOMEM; + goto err1; + } + + /* remap drive's physical memory address */ + mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000); + if (!mem) { + ret = -ENOMEM; + goto err1; + } + + /* request and activate power GPIO, IRQ GPIO */ + ret = gpio_request_array(palmld_hdd_gpios, + ARRAY_SIZE(palmld_hdd_gpios)); + if (ret) + goto err1; + + /* reset the drive */ + gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 0); + msleep(30); + gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 1); + msleep(30); + + /* setup the ata port */ + ap = 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(host, 0, NULL, IRQF_TRIGGER_RISING, + &palmld_sht); + if (ret) + goto err2; + + return ret; + +err2: + gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios)); +err1: + return ret; +} + +static int palmld_pata_remove(struct platform_device *dev) +{ + ata_platform_remove_one(dev); + + /* power down the HDD */ + gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0); + + gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios)); + + 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); |