git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 5a9d2515 MV |
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); |