1 files changed, 116 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/io.c b/arch/arm/mach-omap1/io.c
new file mode 100644
index 000000000000..8587b339884f
--- /dev/null
+++ b/arch/arm/mach-omap1/io.c
@@ -0,0 +1,116 @@
+/*
+ * linux/arch/arm/mach-omap1/io.c
+ *
+ * OMAP1 I/O mapping code
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/mach/map.h>
+#include <asm/io.h>
+#include <asm/arch/tc.h>
+
+#include "../clock.h"
+
+extern void omap_check_revision(void);
+
+/*
+ * The machine specific code may provide the extra mapping besides the
+ * default mapping provided here.
+ */
+static struct map_desc omap_io_desc[] __initdata = {
+ { IO_VIRT,             IO_PHYS,             IO_SIZE,              MT_DEVICE },
+};
+
+#ifdef CONFIG_ARCH_OMAP730
+static struct map_desc omap730_io_desc[] __initdata = {
+ { OMAP730_DSP_BASE,    OMAP730_DSP_START,    OMAP730_DSP_SIZE,    MT_DEVICE },
+ { OMAP730_DSPREG_BASE, OMAP730_DSPREG_START, OMAP730_DSPREG_SIZE, MT_DEVICE },
+ { OMAP730_SRAM_BASE,   OMAP730_SRAM_START,   OMAP730_SRAM_SIZE,   MT_DEVICE }
+};
+#endif
+
+#ifdef CONFIG_ARCH_OMAP1510
+static struct map_desc omap1510_io_desc[] __initdata = {
+ { OMAP1510_DSP_BASE,    OMAP1510_DSP_START,    OMAP1510_DSP_SIZE,    MT_DEVICE },
+ { OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_START, OMAP1510_DSPREG_SIZE, MT_DEVICE },
+ { OMAP1510_SRAM_BASE,   OMAP1510_SRAM_START,   OMAP1510_SRAM_SIZE,   MT_DEVICE }
+};
+#endif
+
+#if defined(CONFIG_ARCH_OMAP16XX)
+static struct map_desc omap1610_io_desc[] __initdata = {
+ { OMAP16XX_DSP_BASE,    OMAP16XX_DSP_START,    OMAP16XX_DSP_SIZE,    MT_DEVICE },
+ { OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_START, OMAP16XX_DSPREG_SIZE, MT_DEVICE },
+ { OMAP16XX_SRAM_BASE,   OMAP16XX_SRAM_START,   OMAP1610_SRAM_SIZE,   MT_DEVICE }
+};
+
+static struct map_desc omap5912_io_desc[] __initdata = {
+ { OMAP16XX_DSP_BASE,    OMAP16XX_DSP_START,    OMAP16XX_DSP_SIZE,    MT_DEVICE },
+ { OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_START, OMAP16XX_DSPREG_SIZE, MT_DEVICE },
+/*
+ * The OMAP5912 has 250kByte internal SRAM. Because the mapping is baseed on page
+ * size (4kByte), it seems that the last 2kByte (=0x800) of the 250kByte are not mapped.
+ * Add additional 2kByte (0x800) so that the last page is mapped and the last 2kByte
+ * can be used.
+ */
+ { OMAP16XX_SRAM_BASE,   OMAP16XX_SRAM_START,   OMAP5912_SRAM_SIZE + 0x800,   MT_DEVICE }
+};
+#endif
+
+static int initialized = 0;
+
+static void __init _omap_map_io(void)
+{
+        initialized = 1;
+
+        /* We have to initialize the IO space mapping before we can run
+         * cpu_is_omapxxx() macros. */
+        iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
+        omap_check_revision();
+
+#ifdef CONFIG_ARCH_OMAP730
+        if (cpu_is_omap730()) {
+                iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
+        }
+#endif
+#ifdef CONFIG_ARCH_OMAP1510
+        if (cpu_is_omap1510()) {
+                iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
+        }
+#endif
+#if defined(CONFIG_ARCH_OMAP16XX)
+        if (cpu_is_omap1610() || cpu_is_omap1710()) {
+                iotable_init(omap1610_io_desc, ARRAY_SIZE(omap1610_io_desc));
+        }
+        if (cpu_is_omap5912()) {
+                iotable_init(omap5912_io_desc, ARRAY_SIZE(omap5912_io_desc));
+        }
+#endif
+
+        /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
+         * on a Posted Write in the TIPB Bridge".
+         */
+        omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
+        omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
+
+        /* Must init clocks early to assure that timer interrupt works
+         */
+        clk_init();
+}
+
+/*
+ * This should only get called from board specific init
+ */
+void omap_map_common_io(void)
+{
+        if (!initialized)
+                _omap_map_io();
+}