| Marek VaĊĦut | 5a9d251 | 2009-05-21 13:11:05 +0100 | [diff] [blame] | 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 | |
| 36 | static struct scsi_host_template palmld_sht = { |
| 37 | ATA_PIO_SHT(DRV_NAME), |
| 38 | }; |
| 39 | |
| 40 | static struct ata_port_operations palmld_port_ops = { |
| 41 | .inherits = &ata_sff_port_ops, |
| 42 | .sff_data_xfer = ata_sff_data_xfer_noirq, |
| 43 | .cable_detect = ata_cable_40wire, |
| 44 | }; |
| 45 | |
| 46 | static __devinit int palmld_pata_probe(struct platform_device *pdev) |
| 47 | { |
| 48 | struct ata_host *host; |
| 49 | struct ata_port *ap; |
| 50 | void __iomem *mem; |
| 51 | int ret; |
| 52 | |
| 53 | /* allocate host */ |
| 54 | host = ata_host_alloc(&pdev->dev, 1); |
| 55 | if (!host) |
| 56 | return -ENOMEM; |
| 57 | |
| 58 | /* remap drive's physical memory address */ |
| 59 | mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000); |
| 60 | if (!mem) |
| 61 | return -ENOMEM; |
| 62 | |
| 63 | /* request and activate power GPIO, IRQ GPIO */ |
| 64 | ret = gpio_request(GPIO_NR_PALMLD_IDE_PWEN, "HDD PWR"); |
| 65 | if (ret) |
| 66 | goto err1; |
| 67 | ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_PWEN, 1); |
| 68 | if (ret) |
| 69 | goto err2; |
| 70 | |
| 71 | ret = gpio_request(GPIO_NR_PALMLD_IDE_RESET, "HDD RST"); |
| 72 | if (ret) |
| 73 | goto err2; |
| 74 | ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_RESET, 0); |
| 75 | if (ret) |
| 76 | goto err3; |
| 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_MMIO | ATA_FLAG_NO_LEGACY | 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 | return ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING, |
| 100 | &palmld_sht); |
| 101 | |
| 102 | err3: |
| 103 | gpio_free(GPIO_NR_PALMLD_IDE_RESET); |
| 104 | err2: |
| 105 | gpio_free(GPIO_NR_PALMLD_IDE_PWEN); |
| 106 | err1: |
| 107 | return ret; |
| 108 | } |
| 109 | |
| 110 | static __devexit int palmld_pata_remove(struct platform_device *dev) |
| 111 | { |
| 112 | struct ata_host *host = platform_get_drvdata(dev); |
| 113 | |
| 114 | ata_host_detach(host); |
| 115 | |
| 116 | /* power down the HDD */ |
| 117 | gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0); |
| 118 | |
| 119 | gpio_free(GPIO_NR_PALMLD_IDE_RESET); |
| 120 | gpio_free(GPIO_NR_PALMLD_IDE_PWEN); |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static struct platform_driver palmld_pata_platform_driver = { |
| 126 | .driver = { |
| 127 | .name = DRV_NAME, |
| 128 | .owner = THIS_MODULE, |
| 129 | }, |
| 130 | .probe = palmld_pata_probe, |
| 131 | .remove = __devexit_p(palmld_pata_remove), |
| 132 | }; |
| 133 | |
| 134 | static int __init palmld_pata_init(void) |
| 135 | { |
| 136 | return platform_driver_register(&palmld_pata_platform_driver); |
| 137 | } |
| 138 | |
| 139 | static void __exit palmld_pata_exit(void) |
| 140 | { |
| 141 | platform_driver_unregister(&palmld_pata_platform_driver); |
| 142 | } |
| 143 | |
| 144 | MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); |
| 145 | MODULE_DESCRIPTION("PalmLD PATA driver"); |
| 146 | MODULE_LICENSE("GPL"); |
| 147 | MODULE_ALIAS("platform:" DRV_NAME); |
| 148 | |
| 149 | module_init(palmld_pata_init); |
| 150 | module_exit(palmld_pata_exit); |