diff options
Diffstat (limited to 'drivers/ide/ide_platform.c')
| -rw-r--r-- | drivers/ide/ide_platform.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/ide/ide_platform.c b/drivers/ide/ide_platform.c new file mode 100644 index 000000000..91639fd6c --- /dev/null +++ b/drivers/ide/ide_platform.c @@ -0,0 +1,133 @@ +// 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"); |