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