/* * 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> #include <linux/of_address.h> #include <linux/platform_device.h> #include <linux/ata_platform.h> #include <linux/libata.h> #define DRV_NAME "pata_of_platform" static struct scsi_host_template pata_platform_sht = { ATA_PIO_SHT(DRV_NAME), }; static int pata_of_platform_probe(struct platform_device *ofdev) { int ret; struct device_node *dn = ofdev->dev.of_node; struct resource io_res; struct resource ctl_res; struct resource *irq_res; unsigned int reg_shift = 0; int pio_mode = 0; int pio_mask; ret = of_address_to_resource(dn, 0, &io_res); if (ret) { dev_err(&ofdev->dev, "can't get IO address from " "device tree\n"); return -EINVAL; } ret = of_address_to_resource(dn, 1, &ctl_res); if (ret) { dev_err(&ofdev->dev, "can't get CTL address from " "device tree\n"); return -EINVAL; } irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0); of_property_read_u32(dn, "reg-shift", ®_shift); if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) { if (pio_mode > 6) { dev_err(&ofdev->dev, "invalid pio-mode\n"); return -EINVAL; } } else { dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); } pio_mask = 1 << pio_mode; pio_mask |= (1 << pio_mode) - 1; return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res, reg_shift, pio_mask, &pata_platform_sht); } static const struct of_device_id pata_of_platform_match[] = { { .compatible = "ata-generic", }, { }, }; MODULE_DEVICE_TABLE(of, pata_of_platform_match); static struct platform_driver pata_of_platform_driver = { .driver = { .name = DRV_NAME, .of_match_table = pata_of_platform_match, }, .probe = pata_of_platform_probe, .remove = ata_platform_remove_one, }; module_platform_driver(pata_of_platform_driver); MODULE_DESCRIPTION("OF-platform PATA driver"); MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); MODULE_LICENSE("GPL");