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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 | }, | |
129 | .probe = plat_ide_probe, | |
130 | .remove = plat_ide_remove, | |
131 | }; | |
132 | ||
133 | module_platform_driver(platform_ide_driver); | |
134 | ||
135 | MODULE_DESCRIPTION("Platform IDE driver"); | |
136 | MODULE_LICENSE("GPL"); | |
137 | MODULE_ALIAS("platform:pata_platform"); |