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1 | /* |
2 | * Platform IDE driver |
3 | * |
4 | * Copyright (C) 2007 MontaVista Software |
5 | * |
6 | * Maintainer: Kumar Gala <galak@kernel.crashing.org> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU General Public License as published by the |
10 | * Free Software Foundation; either version 2 of the License, or (at your |
11 | * option) any later version. |
12 | */ |
13 | |
14 | #include <linux/types.h> |
15 | #include <linux/init.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/ide.h> |
18 | #include <linux/ioport.h> |
19 | #include <linux/module.h> |
20 | #include <linux/ata_platform.h> |
21 | #include <linux/platform_device.h> |
22 | #include <linux/interrupt.h> |
23 | #include <linux/io.h> |
24 | |
25 | static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base, |
26 | void __iomem *ctrl, |
27 | struct pata_platform_info *pdata, int irq) |
28 | { |
29 | unsigned long port = (unsigned long)base; |
30 | int i; |
31 | |
32 | hw->io_ports.data_addr = port; |
33 | |
34 | port += (1 << pdata->ioport_shift); |
35 | for (i = 1; i <= 7; |
36 | i++, port += (1 << pdata->ioport_shift)) |
37 | hw->io_ports_array[i] = port; |
38 | |
39 | hw->io_ports.ctl_addr = (unsigned long)ctrl; |
40 | |
41 | hw->irq = irq; |
42 | } |
43 | |
44 | static const struct ide_port_info platform_ide_port_info = { |
45 | .host_flags = IDE_HFLAG_NO_DMA, |
46 | .chipset = ide_generic, |
47 | }; |
48 | |
49 | static int plat_ide_probe(struct platform_device *pdev) |
50 | { |
51 | struct resource *res_base, *res_alt, *res_irq; |
52 | void __iomem *base, *alt_base; |
53 | struct pata_platform_info *pdata; |
54 | struct ide_host *host; |
55 | int ret = 0, mmio = 0; |
56 | struct ide_hw hw, *hws[] = { &hw }; |
57 | struct ide_port_info d = platform_ide_port_info; |
58 | |
59 | pdata = dev_get_platdata(&pdev->dev); |
60 | |
61 | /* get a pointer to the register memory */ |
62 | res_base = platform_get_resource(pdev, IORESOURCE_IO, 0); |
63 | res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1); |
64 | |
65 | if (!res_base || !res_alt) { |
66 | res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
67 | res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
68 | if (!res_base || !res_alt) { |
69 | ret = -ENOMEM; |
70 | goto out; |
71 | } |
72 | mmio = 1; |
73 | } |
74 | |
75 | res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
76 | if (!res_irq) { |
77 | ret = -EINVAL; |
78 | goto out; |
79 | } |
80 | |
81 | if (mmio) { |
82 | base = devm_ioremap(&pdev->dev, |
83 | res_base->start, resource_size(res_base)); |
84 | alt_base = devm_ioremap(&pdev->dev, |
85 | res_alt->start, resource_size(res_alt)); |
86 | } else { |
87 | base = devm_ioport_map(&pdev->dev, |
88 | res_base->start, resource_size(res_base)); |
89 | alt_base = devm_ioport_map(&pdev->dev, |
90 | res_alt->start, resource_size(res_alt)); |
91 | } |
92 | |
93 | memset(&hw, 0, sizeof(hw)); |
94 | plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start); |
95 | hw.dev = &pdev->dev; |
96 | |
97 | d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK; |
98 | if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE) |
99 | d.irq_flags |= IRQF_SHARED; |
100 | |
101 | if (mmio) |
102 | d.host_flags |= IDE_HFLAG_MMIO; |
103 | |
104 | ret = ide_host_add(&d, hws, 1, &host); |
105 | if (ret) |
106 | goto out; |
107 | |
108 | platform_set_drvdata(pdev, host); |
109 | |
110 | return 0; |
111 | |
112 | out: |
113 | return ret; |
114 | } |
115 | |
116 | static int plat_ide_remove(struct platform_device *pdev) |
117 | { |
118 | struct ide_host *host = dev_get_drvdata(&pdev->dev); |
119 | |
120 | ide_host_remove(host); |
121 | |
122 | return 0; |
123 | } |
124 | |
125 | static struct platform_driver platform_ide_driver = { |
126 | .driver = { |
127 | .name = "pata_platform", |
128 | .owner = THIS_MODULE, |
129 | }, |
130 | .probe = plat_ide_probe, |
131 | .remove = plat_ide_remove, |
132 | }; |
133 | |
134 | static int __init platform_ide_init(void) |
135 | { |
136 | return platform_driver_register(&platform_ide_driver); |
137 | } |
138 | |
139 | static void __exit platform_ide_exit(void) |
140 | { |
141 | platform_driver_unregister(&platform_ide_driver); |
142 | } |
143 | |
144 | MODULE_DESCRIPTION("Platform IDE driver"); |
145 | MODULE_LICENSE("GPL"); |
146 | MODULE_ALIAS("platform:pata_platform"); |
147 | |
148 | module_init(platform_ide_init); |
149 | module_exit(platform_ide_exit); |
150 |
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