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path: root/drivers/ide/ide_platform.c
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Diffstat (limited to 'drivers/ide/ide_platform.c')
-rw-r--r--drivers/ide/ide_platform.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/ide/ide_platform.c b/drivers/ide/ide_platform.c
new file mode 100644
index 0000000..051b4ab
--- /dev/null
+++ b/drivers/ide/ide_platform.c
@@ -0,0 +1,147 @@
+/*
+ * Platform IDE driver
+ *
+ * Copyright (C) 2007 MontaVista Software
+ *
+ * Maintainer: Kumar Gala <galak@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#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/io.h>
+
+static void __devinit plat_ide_setup_ports(hw_regs_t *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;
+
+ hw->chipset = ide_generic;
+}
+
+static const struct ide_port_info platform_ide_port_info = {
+ .host_flags = IDE_HFLAG_NO_DMA,
+};
+
+static int __devinit 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;
+ hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+ struct ide_port_info d = platform_ide_port_info;
+
+ pdata = pdev->dev.platform_data;
+
+ /* 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, res_base->end - res_base->start + 1);
+ alt_base = devm_ioremap(&pdev->dev,
+ res_alt->start, res_alt->end - res_alt->start + 1);
+ } else {
+ base = devm_ioport_map(&pdev->dev,
+ res_base->start, res_base->end - res_base->start + 1);
+ alt_base = devm_ioport_map(&pdev->dev,
+ res_alt->start, res_alt->end - res_alt->start + 1);
+ }
+
+ memset(&hw, 0, sizeof(hw));
+ plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
+ hw.dev = &pdev->dev;
+
+ if (mmio)
+ d.host_flags |= IDE_HFLAG_MMIO;
+
+ ret = ide_host_add(&d, hws, &host);
+ if (ret)
+ goto out;
+
+ platform_set_drvdata(pdev, host);
+
+ return 0;
+
+out:
+ return ret;
+}
+
+static int __devexit plat_ide_remove(struct platform_device *pdev)
+{
+ struct ide_host *host = pdev->dev.driver_data;
+
+ ide_host_remove(host);
+
+ return 0;
+}
+
+static struct platform_driver platform_ide_driver = {
+ .driver = {
+ .name = "pata_platform",
+ .owner = THIS_MODULE,
+ },
+ .probe = plat_ide_probe,
+ .remove = __devexit_p(plat_ide_remove),
+};
+
+static int __init platform_ide_init(void)
+{
+ return platform_driver_register(&platform_ide_driver);
+}
+
+static void __exit platform_ide_exit(void)
+{
+ platform_driver_unregister(&platform_ide_driver);
+}
+
+MODULE_DESCRIPTION("Platform IDE driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pata_platform");
+
+module_init(platform_ide_init);
+module_exit(platform_ide_exit);