pata_palmld.c
3.45 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/*
* 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 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_xfer_noirq,
.cable_detect = ata_cable_40wire,
};
static __devinit 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)
return -ENOMEM;
/* remap drive's physical memory address */
mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
if (!mem)
return -ENOMEM;
/* request and activate power GPIO, IRQ GPIO */
ret = gpio_request(GPIO_NR_PALMLD_IDE_PWEN, "HDD PWR");
if (ret)
goto err1;
ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_PWEN, 1);
if (ret)
goto err2;
ret = gpio_request(GPIO_NR_PALMLD_IDE_RESET, "HDD RST");
if (ret)
goto err2;
ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_RESET, 0);
if (ret)
goto err3;
/* 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_MMIO | ATA_FLAG_NO_LEGACY | 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 */
return ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
&palmld_sht);
err3:
gpio_free(GPIO_NR_PALMLD_IDE_RESET);
err2:
gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
err1:
return ret;
}
static __devexit int palmld_pata_remove(struct platform_device *dev)
{
struct ata_host *host = platform_get_drvdata(dev);
ata_host_detach(host);
/* power down the HDD */
gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
gpio_free(GPIO_NR_PALMLD_IDE_RESET);
gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
return 0;
}
static struct platform_driver palmld_pata_platform_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = palmld_pata_probe,
.remove = __devexit_p(palmld_pata_remove),
};
static int __init palmld_pata_init(void)
{
return platform_driver_register(&palmld_pata_platform_driver);
}
static void __exit palmld_pata_exit(void)
{
platform_driver_unregister(&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);
module_init(palmld_pata_init);
module_exit(palmld_pata_exit);