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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 | ||
6b1e3fca MV |
36 | static struct gpio palmld_hdd_gpios[] = { |
37 | { GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" }, | |
38 | { GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD Reset" }, | |
39 | }; | |
40 | ||
5a9d2515 MV |
41 | static struct scsi_host_template palmld_sht = { |
42 | ATA_PIO_SHT(DRV_NAME), | |
43 | }; | |
44 | ||
45 | static struct ata_port_operations palmld_port_ops = { | |
46 | .inherits = &ata_sff_port_ops, | |
47 | .sff_data_xfer = ata_sff_data_xfer_noirq, | |
48 | .cable_detect = ata_cable_40wire, | |
49 | }; | |
50 | ||
0ec24914 | 51 | static int palmld_pata_probe(struct platform_device *pdev) |
5a9d2515 MV |
52 | { |
53 | struct ata_host *host; | |
54 | struct ata_port *ap; | |
55 | void __iomem *mem; | |
56 | int ret; | |
57 | ||
58 | /* allocate host */ | |
59 | host = ata_host_alloc(&pdev->dev, 1); | |
6b1e3fca MV |
60 | if (!host) { |
61 | ret = -ENOMEM; | |
62 | goto err1; | |
63 | } | |
5a9d2515 MV |
64 | |
65 | /* remap drive's physical memory address */ | |
66 | mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000); | |
6b1e3fca MV |
67 | if (!mem) { |
68 | ret = -ENOMEM; | |
69 | goto err1; | |
70 | } | |
5a9d2515 MV |
71 | |
72 | /* request and activate power GPIO, IRQ GPIO */ | |
6b1e3fca MV |
73 | ret = gpio_request_array(palmld_hdd_gpios, |
74 | ARRAY_SIZE(palmld_hdd_gpios)); | |
5a9d2515 MV |
75 | if (ret) |
76 | goto err1; | |
5a9d2515 MV |
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; | |
9cbe056f | 88 | ap->flags |= ATA_FLAG_PIO_POLLING; |
5a9d2515 MV |
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 */ | |
6b1e3fca | 99 | ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING, |
5a9d2515 | 100 | &palmld_sht); |
6b1e3fca MV |
101 | if (ret) |
102 | goto err2; | |
103 | ||
104 | return ret; | |
5a9d2515 | 105 | |
5a9d2515 | 106 | err2: |
6b1e3fca | 107 | gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios)); |
5a9d2515 MV |
108 | err1: |
109 | return ret; | |
110 | } | |
111 | ||
0ec24914 | 112 | static int palmld_pata_remove(struct platform_device *dev) |
5a9d2515 | 113 | { |
56c1d3b7 | 114 | ata_platform_remove_one(dev); |
5a9d2515 MV |
115 | |
116 | /* power down the HDD */ | |
117 | gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0); | |
118 | ||
6b1e3fca | 119 | gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios)); |
5a9d2515 MV |
120 | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static struct platform_driver palmld_pata_platform_driver = { | |
125 | .driver = { | |
126 | .name = DRV_NAME, | |
127 | .owner = THIS_MODULE, | |
128 | }, | |
129 | .probe = palmld_pata_probe, | |
0ec24914 | 130 | .remove = palmld_pata_remove, |
5a9d2515 MV |
131 | }; |
132 | ||
99c8ea3e | 133 | module_platform_driver(palmld_pata_platform_driver); |
5a9d2515 MV |
134 | |
135 | MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); | |
136 | MODULE_DESCRIPTION("PalmLD PATA driver"); | |
137 | MODULE_LICENSE("GPL"); | |
138 | MODULE_ALIAS("platform:" DRV_NAME); |