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authorMarek VaĊĦut <marek.vasut@gmail.com>2009-05-21 08:11:05 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-05-31 09:50:40 -0400
commit5a9d25150c01bd140ca647b5e7ee75ae18a369a8 (patch)
tree7fab6032b8de678bfbb410561de25ba3d8ce9db5 /drivers/ata/pata_palmld.c
parent949abd84cd54ff864efca9df822d1e02a56694ec (diff)
[ARM] 5522/1: PalmLD: IDE support
Support for Palm LifeDrive's internal harddrive. Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Acked-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/ata/pata_palmld.c')
-rw-r--r--drivers/ata/pata_palmld.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
new file mode 100644
index 00000000000..11fb4ccc74b
--- /dev/null
+++ b/drivers/ata/pata_palmld.c
@@ -0,0 +1,150 @@
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 scsi_host_template palmld_sht = {
37 ATA_PIO_SHT(DRV_NAME),
38};
39
40static 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
46static __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
102err3:
103 gpio_free(GPIO_NR_PALMLD_IDE_RESET);
104err2:
105 gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
106err1:
107 return ret;
108}
109
110static __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
125static 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
134static int __init palmld_pata_init(void)
135{
136 return platform_driver_register(&palmld_pata_platform_driver);
137}
138
139static void __exit palmld_pata_exit(void)
140{
141 platform_driver_unregister(&palmld_pata_platform_driver);
142}
143
144MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
145MODULE_DESCRIPTION("PalmLD PATA driver");
146MODULE_LICENSE("GPL");
147MODULE_ALIAS("platform:" DRV_NAME);
148
149module_init(palmld_pata_init);
150module_exit(palmld_pata_exit);