| /* |
| * 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; |
| bool use16bit; |
| |
| 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"); |
| } |
| |
| use16bit = of_property_read_bool(dn, "ata-generic,use16bit"); |
| |
| 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, |
| use16bit); |
| } |
| |
| 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"); |