2 * OF-platform PATA driver
4 * Copyright (c) 2007 MontaVista Software, Inc.
5 * Anton Vorontsov <avorontsov@ru.mvista.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License (Version 2) as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/of_address.h>
15 #include <linux/platform_device.h>
16 #include <linux/ata_platform.h>
17 #include <linux/libata.h>
19 static int pata_of_platform_probe(struct platform_device *ofdev)
22 struct device_node *dn = ofdev->dev.of_node;
23 struct resource io_res;
24 struct resource ctl_res;
25 struct resource *irq_res;
26 unsigned int reg_shift = 0;
31 ret = of_address_to_resource(dn, 0, &io_res);
33 dev_err(&ofdev->dev, "can't get IO address from "
38 if (of_device_is_compatible(dn, "electra-ide")) {
39 /* Altstatus is really at offset 0x3f6 from the primary window
40 * on electra-ide. Adjust ctl_res and io_res accordingly.
43 ctl_res.start = ctl_res.start+0x3f6;
44 io_res.end = ctl_res.start-1;
46 ret = of_address_to_resource(dn, 1, &ctl_res);
48 dev_err(&ofdev->dev, "can't get CTL address from "
54 irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0);
58 prop = of_get_property(dn, "reg-shift", NULL);
60 reg_shift = be32_to_cpup(prop);
62 prop = of_get_property(dn, "pio-mode", NULL);
64 pio_mode = be32_to_cpup(prop);
66 dev_err(&ofdev->dev, "invalid pio-mode\n");
70 dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n");
73 pio_mask = 1 << pio_mode;
74 pio_mask |= (1 << pio_mode) - 1;
76 return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res,
80 static struct of_device_id pata_of_platform_match[] = {
81 { .compatible = "ata-generic", },
82 { .compatible = "electra-ide", },
85 MODULE_DEVICE_TABLE(of, pata_of_platform_match);
87 static struct platform_driver pata_of_platform_driver = {
89 .name = "pata_of_platform",
91 .of_match_table = pata_of_platform_match,
93 .probe = pata_of_platform_probe,
94 .remove = ata_platform_remove_one,
97 module_platform_driver(pata_of_platform_driver);
99 MODULE_DESCRIPTION("OF-platform PATA driver");
100 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
101 MODULE_LICENSE("GPL");