arch/arm/mach-davinci/board-evm.c

   1 /*
   2  * TI DaVinci EVM board support
   3  *
   4  * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/mtd/mtd.h>
  17 #include <linux/mtd/partitions.h>
  18 #include <linux/mtd/physmap.h>
  19
  20 #include <asm/setup.h>
  21 #include <asm/io.h>
  22 #include <asm/mach-types.h>
  23 #include <asm/hardware.h>
  24
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/map.h>
  27 #include <asm/mach/flash.h>
  28
  29 #include <asm/arch/common.h>
  30
  31 /* other misc. init functions */
  32 void __init davinci_psc_init(void);
  33 void __init davinci_irq_init(void);
  34 void __init davinci_map_common_io(void);
  35 void __init davinci_init_common_hw(void);
  36
  37 /* NOR Flash base address set to CS0 by default */
  38 #define NOR_FLASH_PHYS 0x02000000
  39
  40 static struct mtd_partition davinci_evm_partitions[] = {
  41         /* bootloader (U-Boot, etc) in first 4 sectors */
  42         {
  43                 .name           = "bootloader",
  44                 .offset         = 0,
  45                 .size           = 4 * SZ_64K,
  46                 .mask_flags     = MTD_WRITEABLE, /* force read-only */
  47         },
  48         /* bootloader params in the next 1 sectors */
  49         {
  50                 .name           = "params",
  51                 .offset         = MTDPART_OFS_APPEND,
  52                 .size           = SZ_64K,
  53                 .mask_flags     = 0,
  54         },
  55         /* kernel */
  56         {
  57                 .name           = "kernel",
  58                 .offset         = MTDPART_OFS_APPEND,
  59                 .size           = SZ_2M,
  60                 .mask_flags     = 0
  61         },
  62         /* file system */
  63         {
  64                 .name           = "filesystem",
  65                 .offset         = MTDPART_OFS_APPEND,
  66                 .size           = MTDPART_SIZ_FULL,
  67                 .mask_flags     = 0
  68         }
  69 };
  70
  71 static struct physmap_flash_data davinci_evm_flash_data = {
  72         .width          = 2,
  73         .parts          = davinci_evm_partitions,
  74         .nr_parts       = ARRAY_SIZE(davinci_evm_partitions),
  75 };
  76
  77 /* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
  78  * limits addresses to 16M, so using addresses past 16M will wrap */
  79 static struct resource davinci_evm_flash_resource = {
  80         .start          = NOR_FLASH_PHYS,
  81         .end            = NOR_FLASH_PHYS + SZ_16M - 1,
  82         .flags          = IORESOURCE_MEM,
  83 };
  84
  85 static struct platform_device davinci_evm_flash_device = {
  86         .name           = "physmap-flash",
  87         .id             = 0,
  88         .dev            = {
  89                 .platform_data  = &davinci_evm_flash_data,
  90         },
  91         .num_resources  = 1,
  92         .resource       = &davinci_evm_flash_resource,
  93 };
  94
  95 static struct platform_device *davinci_evm_devices[] __initdata = {
  96         &davinci_evm_flash_device,
  97 };
  98
  99 static void __init
 100 davinci_evm_map_io(void)
 101 {
 102         davinci_map_common_io();
 103 }
 104
 105 static __init void davinci_evm_init(void)
 106 {
 107         davinci_psc_init();
 108
 109 #if defined(CONFIG_BLK_DEV_DAVINCI) || defined(CONFIG_BLK_DEV_DAVINCI_MODULE)
 110         printk(KERN_WARNING "WARNING: both IDE and NOR flash are enabled, "
 111                "but share pins.\n\t Disable IDE for NOR support.\n");
 112 #endif
 113
 114         platform_add_devices(davinci_evm_devices,
 115                              ARRAY_SIZE(davinci_evm_devices));
 116 }
 117
 118 static __init void davinci_evm_irq_init(void)
 119 {
 120         davinci_init_common_hw();
 121         davinci_irq_init();
 122 }
 123
 124 MACHINE_START(DAVINCI_EVM, "DaVinci EVM")
 125         /* Maintainer: MontaVista Software <source@mvista.com> */
 126         .phys_io      = IO_PHYS,
 127         .io_pg_offst  = (io_p2v(IO_PHYS) >> 18) & 0xfffc,
 128         .boot_params  = (DAVINCI_DDR_BASE + 0x100),
 129         .map_io       = davinci_evm_map_io,
 130         .init_irq     = davinci_evm_irq_init,
 131         .timer        = &davinci_timer,
 132         .init_machine = davinci_evm_init,
 133 MACHINE_END