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89 lines
2.2 KiB
89 lines
2.2 KiB
/* |
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* OF-platform PATA driver |
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* |
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* Copyright (c) 2007 MontaVista Software, Inc. |
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* Anton Vorontsov <avorontsov@ru.mvista.com> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License (Version 2) as |
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* published by the Free Software Foundation. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/of_address.h> |
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#include <linux/platform_device.h> |
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#include <linux/ata_platform.h> |
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#include <linux/libata.h> |
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static int pata_of_platform_probe(struct platform_device *ofdev) |
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{ |
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int ret; |
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struct device_node *dn = ofdev->dev.of_node; |
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struct resource io_res; |
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struct resource ctl_res; |
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struct resource *irq_res; |
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unsigned int reg_shift = 0; |
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int pio_mode = 0; |
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int pio_mask; |
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const u32 *prop; |
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ret = of_address_to_resource(dn, 0, &io_res); |
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if (ret) { |
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dev_err(&ofdev->dev, "can't get IO address from " |
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"device tree\n"); |
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return -EINVAL; |
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} |
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ret = of_address_to_resource(dn, 1, &ctl_res); |
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if (ret) { |
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dev_err(&ofdev->dev, "can't get CTL address from " |
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"device tree\n"); |
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return -EINVAL; |
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} |
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irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0); |
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prop = of_get_property(dn, "reg-shift", NULL); |
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if (prop) |
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reg_shift = be32_to_cpup(prop); |
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prop = of_get_property(dn, "pio-mode", NULL); |
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if (prop) { |
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pio_mode = be32_to_cpup(prop); |
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if (pio_mode > 6) { |
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dev_err(&ofdev->dev, "invalid pio-mode\n"); |
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return -EINVAL; |
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} |
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} else { |
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dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); |
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} |
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pio_mask = 1 << pio_mode; |
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pio_mask |= (1 << pio_mode) - 1; |
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return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res, |
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reg_shift, pio_mask); |
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} |
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static struct of_device_id pata_of_platform_match[] = { |
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{ .compatible = "ata-generic", }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, pata_of_platform_match); |
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static struct platform_driver pata_of_platform_driver = { |
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.driver = { |
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.name = "pata_of_platform", |
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.owner = THIS_MODULE, |
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.of_match_table = pata_of_platform_match, |
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}, |
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.probe = pata_of_platform_probe, |
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.remove = ata_platform_remove_one, |
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}; |
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module_platform_driver(pata_of_platform_driver); |
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MODULE_DESCRIPTION("OF-platform PATA driver"); |
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MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); |
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MODULE_LICENSE("GPL");
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