diff options
author | Marek VaĊĦut <marek.vasut@gmail.com> | 2009-05-21 08:11:05 -0400 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-05-31 09:50:40 -0400 |
commit | 5a9d25150c01bd140ca647b5e7ee75ae18a369a8 (patch) | |
tree | 7fab6032b8de678bfbb410561de25ba3d8ce9db5 /drivers/ata/pata_palmld.c | |
parent | 949abd84cd54ff864efca9df822d1e02a56694ec (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.c | 150 |
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 | |||
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); | ||