release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-tegra/board-harmony.c

   1 /*
   2  * arch/arm/mach-tegra/board-harmony.c
   3  *
   4  * Copyright (C) 2010 Google, Inc.
   5  *
   6  * This software is licensed under the terms of the GNU General Public
   7  * License version 2, as published by the Free Software Foundation, and
   8  * may be copied, distributed, and modified under those terms.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/serial_8250.h>
  21 #include <linux/clk.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/pda_power.h>
  24 #include <linux/io.h>
  25
  26 #include <asm/mach-types.h>
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/time.h>
  29 #include <asm/setup.h>
  30
  31 #include <mach/iomap.h>
  32 #include <mach/irqs.h>
  33
  34 #include "board.h"
  35 #include "board-harmony.h"
  36 #include "clock.h"
  37
  38 /* NVidia bootloader tags */
  39 #define ATAG_NVIDIA             0x41000801
  40
  41 #define ATAG_NVIDIA_RM                  0x1
  42 #define ATAG_NVIDIA_DISPLAY             0x2
  43 #define ATAG_NVIDIA_FRAMEBUFFER         0x3
  44 #define ATAG_NVIDIA_CHIPSHMOO           0x4
  45 #define ATAG_NVIDIA_CHIPSHMOOPHYS       0x5
  46 #define ATAG_NVIDIA_PRESERVED_MEM_0     0x10000
  47 #define ATAG_NVIDIA_PRESERVED_MEM_N     2
  48 #define ATAG_NVIDIA_FORCE_32            0x7fffffff
  49
  50 struct tag_tegra {
  51         __u32 bootarg_key;
  52         __u32 bootarg_len;
  53         char bootarg[1];
  54 };
  55
  56 static int __init parse_tag_nvidia(const struct tag *tag)
  57 {
  58
  59         return 0;
  60 }
  61 __tagtable(ATAG_NVIDIA, parse_tag_nvidia);
  62
  63 static struct plat_serial8250_port debug_uart_platform_data[] = {
  64         {
  65                 .membase        = IO_ADDRESS(TEGRA_UARTD_BASE),
  66                 .mapbase        = TEGRA_UARTD_BASE,
  67                 .irq            = INT_UARTD,
  68                 .flags          = UPF_BOOT_AUTOCONF,
  69                 .iotype         = UPIO_MEM,
  70                 .regshift       = 2,
  71                 .uartclk        = 216000000,
  72         }, {
  73                 .flags          = 0
  74         }
  75 };
  76
  77 static struct platform_device debug_uart = {
  78         .name = "serial8250",
  79         .id = PLAT8250_DEV_PLATFORM,
  80         .dev = {
  81                 .platform_data = debug_uart_platform_data,
  82         },
  83 };
  84
  85 static struct platform_device *harmony_devices[] __initdata = {
  86         &debug_uart,
  87 };
  88
  89 static void __init tegra_harmony_fixup(struct machine_desc *desc,
  90         struct tag *tags, char **cmdline, struct meminfo *mi)
  91 {
  92         mi->nr_banks = 2;
  93         mi->bank[0].start = PHYS_OFFSET;
  94         mi->bank[0].size = 448 * SZ_1M;
  95         mi->bank[1].start = SZ_512M;
  96         mi->bank[1].size = SZ_512M;
  97 }
  98
  99 static __initdata struct tegra_clk_init_table harmony_clk_init_table[] = {
 100         /* name         parent          rate            enabled */
 101         { "uartd",      "pll_p",        216000000,      true },
 102         { NULL,         NULL,           0,              0},
 103 };
 104
 105 static void __init tegra_harmony_init(void)
 106 {
 107         tegra_common_init();
 108
 109         tegra_clk_init_from_table(harmony_clk_init_table);
 110
 111         harmony_pinmux_init();
 112
 113         platform_add_devices(harmony_devices, ARRAY_SIZE(harmony_devices));
 114 }
 115
 116 MACHINE_START(HARMONY, "harmony")
 117         .boot_params  = 0x00000100,
 118         .phys_io        = IO_APB_PHYS,
 119         .io_pg_offst    = ((IO_APB_VIRT) >> 18) & 0xfffc,
 120         .fixup          = tegra_harmony_fixup,
 121         .init_irq       = tegra_init_irq,
 122         .init_machine   = tegra_harmony_init,
 123         .map_io         = tegra_map_common_io,
 124         .timer          = &tegra_timer,
 125 MACHINE_END