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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); |
151 |
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