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90 lines
2.2 KiB
90 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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 <[email protected]> |
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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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#define DRV_NAME "pata_of_platform" |
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static struct scsi_host_template pata_platform_sht = { |
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ATA_PIO_SHT(DRV_NAME), |
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}; |
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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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bool use16bit; |
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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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of_property_read_u32(dn, "reg-shift", ®_shift); |
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if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) { |
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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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use16bit = of_property_read_bool(dn, "ata-generic,use16bit"); |
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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, &pata_platform_sht, |
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use16bit); |
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} |
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static const 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 = DRV_NAME, |
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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 <[email protected]>"); |
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MODULE_LICENSE("GPL");
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