/drivers/ata/pata_palmld.c
C | 151 lines | 94 code | 27 blank | 30 comment | 4 complexity | 5dd7b5e64ed01d56e9924c47edf9242c MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
1/* 2 * drivers/ata/pata_palmld.c 3 * 4 * Driver for IDE channel in Palm LifeDrive 5 * 6 * Based on research of: 7 * Alex Osborne <ato@meshy.org> 8 * 9 * Rewrite for mainline: 10 * Marek Vasut <marek.vasut@gmail.com> 11 * 12 * Rewritten version based on pata_ixp4xx_cf.c: 13 * ixp4xx PATA/Compact Flash driver 14 * Copyright (C) 2006-07 Tower Technologies 15 * Author: Alessandro Zummo <a.zummo@towertech.it> 16 * 17 * This program is free software; you can redistribute it and/or modify 18 * it under the terms of the GNU General Public License version 2 as 19 * published by the Free Software Foundation. 20 * 21 */ 22 23#include <linux/kernel.h> 24#include <linux/module.h> 25#include <linux/libata.h> 26#include <linux/irq.h> 27#include <linux/platform_device.h> 28#include <linux/delay.h> 29#include <linux/gpio.h> 30 31#include <scsi/scsi_host.h> 32#include <mach/palmld.h> 33 34#define DRV_NAME "pata_palmld" 35 36static struct gpio palmld_hdd_gpios[] = { 37 { GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" }, 38 { GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD Reset" }, 39}; 40 41static struct scsi_host_template palmld_sht = { 42 ATA_PIO_SHT(DRV_NAME), 43}; 44 45static struct ata_port_operations palmld_port_ops = { 46 .inherits = &ata_sff_port_ops, 47 .sff_data_xfer = ata_sff_data_xfer_noirq, 48 .cable_detect = ata_cable_40wire, 49}; 50 51static __devinit int palmld_pata_probe(struct platform_device *pdev) 52{ 53 struct ata_host *host; 54 struct ata_port *ap; 55 void __iomem *mem; 56 int ret; 57 58 /* allocate host */ 59 host = ata_host_alloc(&pdev->dev, 1); 60 if (!host) { 61 ret = -ENOMEM; 62 goto err1; 63 } 64 65 /* remap drive's physical memory address */ 66 mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000); 67 if (!mem) { 68 ret = -ENOMEM; 69 goto err1; 70 } 71 72 /* request and activate power GPIO, IRQ GPIO */ 73 ret = gpio_request_array(palmld_hdd_gpios, 74 ARRAY_SIZE(palmld_hdd_gpios)); 75 if (ret) 76 goto err1; 77 78 /* reset the drive */ 79 gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 0); 80 msleep(30); 81 gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 1); 82 msleep(30); 83 84 /* setup the ata port */ 85 ap = host->ports[0]; 86 ap->ops = &palmld_port_ops; 87 ap->pio_mask = ATA_PIO4; 88 ap->flags |= ATA_FLAG_PIO_POLLING; 89 90 /* memory mapping voodoo */ 91 ap->ioaddr.cmd_addr = mem + 0x10; 92 ap->ioaddr.altstatus_addr = mem + 0xe; 93 ap->ioaddr.ctl_addr = mem + 0xe; 94 95 /* start the port */ 96 ata_sff_std_ports(&ap->ioaddr); 97 98 /* activate host */ 99 ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING, 100 &palmld_sht); 101 if (ret) 102 goto err2; 103 104 return ret; 105 106err2: 107 gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios)); 108err1: 109 return ret; 110} 111 112static __devexit int palmld_pata_remove(struct platform_device *dev) 113{ 114 struct ata_host *host = platform_get_drvdata(dev); 115 116 ata_host_detach(host); 117 118 /* power down the HDD */ 119 gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0); 120 121 gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios)); 122 123 return 0; 124} 125 126static struct platform_driver palmld_pata_platform_driver = { 127 .driver = { 128 .name = DRV_NAME, 129 .owner = THIS_MODULE, 130 }, 131 .probe = palmld_pata_probe, 132 .remove = __devexit_p(palmld_pata_remove), 133}; 134 135static int __init palmld_pata_init(void) 136{ 137 return platform_driver_register(&palmld_pata_platform_driver); 138} 139 140static void __exit palmld_pata_exit(void) 141{ 142 platform_driver_unregister(&palmld_pata_platform_driver); 143} 144 145MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); 146MODULE_DESCRIPTION("PalmLD PATA driver"); 147MODULE_LICENSE("GPL"); 148MODULE_ALIAS("platform:" DRV_NAME); 149 150module_init(palmld_pata_init); 151module_exit(palmld_pata_exit);