Merge branch 'upstream/wm8974' into for-2.6.33

[pandora-kernel.git] / arch / arm / mach-omap2 / io.c

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 916fcd3..3a86b0f 100644 (file)
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -4,12 +4,14 @@
  * OMAP2 I/O mapping code
  *
  * Copyright (C) 2005 Nokia Corporation
- * Copyright (C) 2007 Texas Instruments
+ * Copyright (C) 2007-2009 Texas Instruments
  *
  * Author:
  *     Juha Yrjola <juha.yrjola@nokia.com>
  *     Syed Khasim <x0khasim@ti.com>
  *
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.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.
@@ -19,6 +21,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/clk.h>
 
 #include <asm/tlb.h>
 
@@ -30,6 +33,7 @@
 #include <mach/sdrc.h>
 #include <mach/gpmc.h>
 
+#ifndef CONFIG_ARCH_OMAP4      /* FIXME: Remove this once clkdev is ready */
 #include "clock.h"
 
 #include <mach/powerdomain.h>
@@ -38,7 +42,7 @@
 
 #include <mach/clockdomain.h>
 #include "clockdomains.h"
-
+#endif
 /*
  * The machine specific code may provide the extra mapping besides the
  * default mapping provided here.
@@ -166,6 +170,46 @@ static struct map_desc omap34xx_io_desc[] __initdata = {
        },
 };
 #endif
+#ifdef CONFIG_ARCH_OMAP4
+static struct map_desc omap44xx_io_desc[] __initdata = {
+       {
+               .virtual        = L3_44XX_VIRT,
+               .pfn            = __phys_to_pfn(L3_44XX_PHYS),
+               .length         = L3_44XX_SIZE,
+               .type           = MT_DEVICE,
+       },
+       {
+               .virtual        = L4_44XX_VIRT,
+               .pfn            = __phys_to_pfn(L4_44XX_PHYS),
+               .length         = L4_44XX_SIZE,
+               .type           = MT_DEVICE,
+       },
+       {
+               .virtual        = L4_WK_44XX_VIRT,
+               .pfn            = __phys_to_pfn(L4_WK_44XX_PHYS),
+               .length         = L4_WK_44XX_SIZE,
+               .type           = MT_DEVICE,
+       },
+       {
+               .virtual        = OMAP44XX_GPMC_VIRT,
+               .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
+               .length         = OMAP44XX_GPMC_SIZE,
+               .type           = MT_DEVICE,
+       },
+       {
+               .virtual        = L4_PER_44XX_VIRT,
+               .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
+               .length         = L4_PER_44XX_SIZE,
+               .type           = MT_DEVICE,
+       },
+       {
+               .virtual        = L4_EMU_44XX_VIRT,
+               .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
+               .length         = L4_EMU_44XX_SIZE,
+               .type           = MT_DEVICE,
+       },
+};
+#endif
 
 void __init omap2_map_common_io(void)
 {
@@ -183,6 +227,9 @@ void __init omap2_map_common_io(void)
        iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 #endif
 
+#if defined(CONFIG_ARCH_OMAP4)
+       iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
+#endif
        /* Normally devicemaps_init() would flush caches and tlb after
         * mdesc->map_io(), but we must also do it here because of the CPU
         * revision check below.
@@ -195,12 +242,49 @@ void __init omap2_map_common_io(void)
        omapfb_reserve_sdram();
 }
 
+/*
+ * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
+ *
+ * Sets the CORE DPLL3 M2 divider to the same value that it's at
+ * currently.  This has the effect of setting the SDRC SDRAM AC timing
+ * registers to the values currently defined by the kernel.  Currently
+ * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
+ * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
+ * or passes along the return value of clk_set_rate().
+ */
+static int __init _omap2_init_reprogram_sdrc(void)
+{
+       struct clk *dpll3_m2_ck;
+       int v = -EINVAL;
+       long rate;
+
+       if (!cpu_is_omap34xx())
+               return 0;
+
+       dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
+       if (!dpll3_m2_ck)
+               return -EINVAL;
+
+       rate = clk_get_rate(dpll3_m2_ck);
+       pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
+       v = clk_set_rate(dpll3_m2_ck, rate);
+       if (v)
+               pr_err("dpll3_m2_clk rate change failed: %d\n", v);
+
+       clk_put(dpll3_m2_ck);
+
+       return v;
+}
+
 void __init omap2_init_common_hw(struct omap_sdrc_params *sp)
 {
        omap2_mux_init();
+#ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
        pwrdm_init(powerdomains_omap);
        clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
        omap2_clk_init();
        omap2_sdrc_init(sp);
+       _omap2_init_reprogram_sdrc();
+#endif
        gpmc_init();
 }