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-rw-r--r--arch/mips/sibyte/swarm/platform.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/mips/sibyte/swarm/platform.c b/arch/mips/sibyte/swarm/platform.c
new file mode 100644
index 00000000000..54847fe1e56
--- /dev/null
+++ b/arch/mips/sibyte/swarm/platform.c
@@ -0,0 +1,85 @@
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+
+#include <asm/sibyte/board.h>
+#include <asm/sibyte/sb1250_genbus.h>
+#include <asm/sibyte/sb1250_regs.h>
+
+#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)
+
+#define DRV_NAME "pata-swarm"
+
+#define SWARM_IDE_SHIFT 5
+#define SWARM_IDE_BASE 0x1f0
+#define SWARM_IDE_CTRL 0x3f6
+
+static struct resource swarm_pata_resource[] = {
+ {
+ .name = "Swarm GenBus IDE",
+ .flags = IORESOURCE_MEM,
+ }, {
+ .name = "Swarm GenBus IDE",
+ .flags = IORESOURCE_MEM,
+ }, {
+ .name = "Swarm GenBus IDE",
+ .flags = IORESOURCE_IRQ,
+ .start = K_INT_GB_IDE,
+ .end = K_INT_GB_IDE,
+ },
+};
+
+static struct pata_platform_info pata_platform_data = {
+ .ioport_shift = SWARM_IDE_SHIFT,
+};
+
+static struct platform_device swarm_pata_device = {
+ .name = "pata_platform",
+ .id = -1,
+ .resource = swarm_pata_resource,
+ .num_resources = ARRAY_SIZE(swarm_pata_resource),
+ .dev = {
+ .platform_data = &pata_platform_data,
+ .coherent_dma_mask = ~0, /* grumble */
+ },
+};
+
+static int __init swarm_pata_init(void)
+{
+ u8 __iomem *base;
+ phys_t offset, size;
+ struct resource *r;
+
+ if (!SIBYTE_HAVE_IDE)
+ return -ENODEV;
+
+ base = ioremap(A_IO_EXT_BASE, 0x800);
+ offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
+ size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
+ iounmap(base);
+
+ offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
+ size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
+ if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
+ pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");
+
+ return -EBUSY;
+ }
+
+ pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);
+
+ r = swarm_pata_resource;
+ r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
+ r[0].end = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
+ r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
+ r[1].end = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;
+
+ return platform_device_register(&swarm_pata_device);
+}
+
+device_initcall(swarm_pata_init);
+
+#endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */