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
plat_ide_setup_ports(struct ide_hw * hw,void __iomem * base,void __iomem * ctrl,struct pata_platform_info * pdata,int irq)25 static void __devinit plat_ide_setup_ports(struct ide_hw *hw,
26 void __iomem *base,
27 void __iomem *ctrl,
28 struct pata_platform_info *pdata,
29 int irq)
30 {
31 unsigned long port = (unsigned long)base;
32 int i;
33
34 hw->io_ports.data_addr = port;
35
36 port += (1 << pdata->ioport_shift);
37 for (i = 1; i <= 7;
38 i++, port += (1 << pdata->ioport_shift))
39 hw->io_ports_array[i] = port;
40
41 hw->io_ports.ctl_addr = (unsigned long)ctrl;
42
43 hw->irq = irq;
44 }
45
46 static const struct ide_port_info platform_ide_port_info = {
47 .host_flags = IDE_HFLAG_NO_DMA,
48 .chipset = ide_generic,
49 };
50
plat_ide_probe(struct platform_device * pdev)51 static int __devinit plat_ide_probe(struct platform_device *pdev)
52 {
53 struct resource *res_base, *res_alt, *res_irq;
54 void __iomem *base, *alt_base;
55 struct pata_platform_info *pdata;
56 struct ide_host *host;
57 int ret = 0, mmio = 0;
58 struct ide_hw hw, *hws[] = { &hw };
59 struct ide_port_info d = platform_ide_port_info;
60
61 pdata = pdev->dev.platform_data;
62
63 /* get a pointer to the register memory */
64 res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
65 res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
66
67 if (!res_base || !res_alt) {
68 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
69 res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
70 if (!res_base || !res_alt) {
71 ret = -ENOMEM;
72 goto out;
73 }
74 mmio = 1;
75 }
76
77 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
78 if (!res_irq) {
79 ret = -EINVAL;
80 goto out;
81 }
82
83 if (mmio) {
84 base = devm_ioremap(&pdev->dev,
85 res_base->start, resource_size(res_base));
86 alt_base = devm_ioremap(&pdev->dev,
87 res_alt->start, resource_size(res_alt));
88 } else {
89 base = devm_ioport_map(&pdev->dev,
90 res_base->start, resource_size(res_base));
91 alt_base = devm_ioport_map(&pdev->dev,
92 res_alt->start, resource_size(res_alt));
93 }
94
95 memset(&hw, 0, sizeof(hw));
96 plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
97 hw.dev = &pdev->dev;
98
99 d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
100 if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
101 d.irq_flags |= IRQF_SHARED;
102
103 if (mmio)
104 d.host_flags |= IDE_HFLAG_MMIO;
105
106 ret = ide_host_add(&d, hws, 1, &host);
107 if (ret)
108 goto out;
109
110 platform_set_drvdata(pdev, host);
111
112 return 0;
113
114 out:
115 return ret;
116 }
117
plat_ide_remove(struct platform_device * pdev)118 static int __devexit plat_ide_remove(struct platform_device *pdev)
119 {
120 struct ide_host *host = dev_get_drvdata(&pdev->dev);
121
122 ide_host_remove(host);
123
124 return 0;
125 }
126
127 static struct platform_driver platform_ide_driver = {
128 .driver = {
129 .name = "pata_platform",
130 .owner = THIS_MODULE,
131 },
132 .probe = plat_ide_probe,
133 .remove = __devexit_p(plat_ide_remove),
134 };
135
platform_ide_init(void)136 static int __init platform_ide_init(void)
137 {
138 return platform_driver_register(&platform_ide_driver);
139 }
140
platform_ide_exit(void)141 static void __exit platform_ide_exit(void)
142 {
143 platform_driver_unregister(&platform_ide_driver);
144 }
145
146 MODULE_DESCRIPTION("Platform IDE driver");
147 MODULE_LICENSE("GPL");
148 MODULE_ALIAS("platform:pata_platform");
149
150 module_init(platform_ide_init);
151 module_exit(platform_ide_exit);
152