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drivers/ata/pata_of_platform.c
2.7 KB
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/* * OF-platform PATA driver * * Copyright (c) 2007 MontaVista Software, Inc. * Anton Vorontsov <avorontsov@ru.mvista.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. */ #include <linux/kernel.h> #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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static int __devinit pata_of_platform_probe(struct platform_device *ofdev) |
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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; struct resource ctl_res; |
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struct resource *irq_res; |
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unsigned int reg_shift = 0; int pio_mode = 0; int pio_mask; const u32 *prop; ret = of_address_to_resource(dn, 0, &io_res); if (ret) { dev_err(&ofdev->dev, "can't get IO address from " "device tree "); return -EINVAL; } |
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if (of_device_is_compatible(dn, "electra-ide")) { /* Altstatus is really at offset 0x3f6 from the primary window * on electra-ide. Adjust ctl_res and io_res accordingly. */ ctl_res = io_res; ctl_res.start = ctl_res.start+0x3f6; io_res.end = ctl_res.start-1; } else { ret = of_address_to_resource(dn, 1, &ctl_res); if (ret) { dev_err(&ofdev->dev, "can't get CTL address from " "device tree "); return -EINVAL; } |
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} |
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irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0); if (irq_res) irq_res->flags = 0; |
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prop = of_get_property(dn, "reg-shift", NULL); if (prop) |
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reg_shift = be32_to_cpup(prop); |
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prop = of_get_property(dn, "pio-mode", NULL); if (prop) { |
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pio_mode = be32_to_cpup(prop); |
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if (pio_mode > 6) { dev_err(&ofdev->dev, "invalid pio-mode "); return -EINVAL; } } else { dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0 "); } pio_mask = 1 << pio_mode; 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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static int __devexit pata_of_platform_remove(struct platform_device *ofdev) |
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{ return __pata_platform_remove(&ofdev->dev); } static struct of_device_id pata_of_platform_match[] = { { .compatible = "ata-generic", }, |
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{ .compatible = "electra-ide", }, |
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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 = { .name = "pata_of_platform", .owner = THIS_MODULE, .of_match_table = pata_of_platform_match, }, |
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.probe = pata_of_platform_probe, .remove = __devexit_p(pata_of_platform_remove), }; |
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module_platform_driver(pata_of_platform_driver); |
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MODULE_DESCRIPTION("OF-platform PATA driver"); MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); MODULE_LICENSE("GPL"); |