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 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
plat_ide_probe(struct platform_device * pdev)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
plat_ide_remove(struct platform_device * pdev)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");
138
