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133 lines
3.0 KiB
133 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Platform IDE driver |
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* |
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* Copyright (C) 2007 MontaVista Software |
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* |
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* Maintainer: Kumar Gala <[email protected]> |
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*/ |
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#include <linux/types.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/ide.h> |
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#include <linux/ioport.h> |
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#include <linux/module.h> |
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#include <linux/ata_platform.h> |
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#include <linux/platform_device.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base, |
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void __iomem *ctrl, |
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struct pata_platform_info *pdata, int irq) |
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{ |
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unsigned long port = (unsigned long)base; |
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int i; |
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hw->io_ports.data_addr = port; |
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port += (1 << pdata->ioport_shift); |
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for (i = 1; i <= 7; |
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i++, port += (1 << pdata->ioport_shift)) |
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hw->io_ports_array[i] = port; |
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hw->io_ports.ctl_addr = (unsigned long)ctrl; |
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hw->irq = irq; |
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} |
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static const struct ide_port_info platform_ide_port_info = { |
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.host_flags = IDE_HFLAG_NO_DMA, |
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.chipset = ide_generic, |
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}; |
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static int plat_ide_probe(struct platform_device *pdev) |
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{ |
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struct resource *res_base, *res_alt, *res_irq; |
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void __iomem *base, *alt_base; |
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struct pata_platform_info *pdata; |
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struct ide_host *host; |
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int ret = 0, mmio = 0; |
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struct ide_hw hw, *hws[] = { &hw }; |
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struct ide_port_info d = platform_ide_port_info; |
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pdata = dev_get_platdata(&pdev->dev); |
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/* get a pointer to the register memory */ |
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res_base = platform_get_resource(pdev, IORESOURCE_IO, 0); |
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res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1); |
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if (!res_base || !res_alt) { |
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res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
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if (!res_base || !res_alt) { |
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ret = -ENOMEM; |
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goto out; |
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} |
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mmio = 1; |
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} |
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res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
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if (!res_irq) { |
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ret = -EINVAL; |
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goto out; |
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} |
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if (mmio) { |
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base = devm_ioremap(&pdev->dev, |
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res_base->start, resource_size(res_base)); |
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alt_base = devm_ioremap(&pdev->dev, |
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res_alt->start, resource_size(res_alt)); |
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} else { |
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base = devm_ioport_map(&pdev->dev, |
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res_base->start, resource_size(res_base)); |
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alt_base = devm_ioport_map(&pdev->dev, |
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res_alt->start, resource_size(res_alt)); |
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} |
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memset(&hw, 0, sizeof(hw)); |
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plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start); |
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hw.dev = &pdev->dev; |
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d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK; |
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if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE) |
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d.irq_flags |= IRQF_SHARED; |
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if (mmio) |
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d.host_flags |= IDE_HFLAG_MMIO; |
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ret = ide_host_add(&d, hws, 1, &host); |
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if (ret) |
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goto out; |
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platform_set_drvdata(pdev, host); |
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return 0; |
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out: |
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return ret; |
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} |
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static int plat_ide_remove(struct platform_device *pdev) |
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{ |
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struct ide_host *host = dev_get_drvdata(&pdev->dev); |
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ide_host_remove(host); |
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return 0; |
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} |
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static struct platform_driver platform_ide_driver = { |
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.driver = { |
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.name = "pata_platform", |
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}, |
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.probe = plat_ide_probe, |
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.remove = plat_ide_remove, |
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}; |
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module_platform_driver(platform_ide_driver); |
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MODULE_DESCRIPTION("Platform IDE driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:pata_platform");
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