Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / ata / pata_of_platform.c

diff --git a/kernel/drivers/ata/pata_of_platform.c b/kernel/drivers/ata/pata_of_platform.c
new file mode 100644 (file)
index 0000000..b6b7af8
--- /dev/null
+++ b/kernel/drivers/ata/pata_of_platform.c
@@ -0,0 +1,94 @@
+/*
+ * OF-platform PATA driver
+ *
+ * Copyright (c) 2007  MontaVista Software, Inc.
+ *                     Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_of_platform"
+
+static struct scsi_host_template pata_platform_sht = {
+       ATA_PIO_SHT(DRV_NAME),
+};
+
+static int pata_of_platform_probe(struct platform_device *ofdev)
+{
+       int ret;
+       struct device_node *dn = ofdev->dev.of_node;
+       struct resource io_res;
+       struct resource ctl_res;
+       struct resource *irq_res;
+       unsigned int reg_shift = 0;
+       int pio_mode = 0;
+       int pio_mask;
+       const u32 *prop;
+
+       ret = of_address_to_resource(dn, 0, &io_res);
+       if (ret) {
+               dev_err(&ofdev->dev, "can't get IO address from "
+                       "device tree\n");
+               return -EINVAL;
+       }
+
+       ret = of_address_to_resource(dn, 1, &ctl_res);
+       if (ret) {
+               dev_err(&ofdev->dev, "can't get CTL address from "
+                       "device tree\n");
+               return -EINVAL;
+       }
+
+       irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0);
+
+       prop = of_get_property(dn, "reg-shift", NULL);
+       if (prop)
+               reg_shift = be32_to_cpup(prop);
+
+       prop = of_get_property(dn, "pio-mode", NULL);
+       if (prop) {
+               pio_mode = be32_to_cpup(prop);
+               if (pio_mode > 6) {
+                       dev_err(&ofdev->dev, "invalid pio-mode\n");
+                       return -EINVAL;
+               }
+       } else {
+               dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n");
+       }
+
+       pio_mask = 1 << pio_mode;
+       pio_mask |= (1 << pio_mode) - 1;
+
+       return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res,
+                                    reg_shift, pio_mask, &pata_platform_sht);
+}
+
+static struct of_device_id pata_of_platform_match[] = {
+       { .compatible = "ata-generic", },
+       { },
+};
+MODULE_DEVICE_TABLE(of, pata_of_platform_match);
+
+static struct platform_driver pata_of_platform_driver = {
+       .driver = {
+               .name = DRV_NAME,
+               .of_match_table = pata_of_platform_match,
+       },
+       .probe          = pata_of_platform_probe,
+       .remove         = ata_platform_remove_one,
+};
+
+module_platform_driver(pata_of_platform_driver);
+
+MODULE_DESCRIPTION("OF-platform PATA driver");
+MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
+MODULE_LICENSE("GPL");