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
  36 /* NOR Flash base address set to CS0 by default */
  37 #define NOR_FLASH_PHYS 0x02000000
  38
  39 static struct mtd_partition davinci_evm_partitions[] = {
  40         /* bootloader (U-Boot, etc) in first 4 sectors */
  41         {
  42                 .name           = "bootloader",
  43                 .offset         = 0,
  44                 .size           = 4 * SZ_64K,
  45                 .mask_flags     = MTD_WRITEABLE, /* force read-only */
  46         },
  47         /* bootloader params in the next 1 sectors */
  48         {
  49                 .name           = "params",
  50                 .offset         = MTDPART_OFS_APPEND,
  51                 .size           = SZ_64K,
  52                 .mask_flags     = 0,
  53         },
  54         /* kernel */
  55         {
  56                 .name           = "kernel",
  57                 .offset         = MTDPART_OFS_APPEND,
  58                 .size           = SZ_2M,
  59                 .mask_flags     = 0
  60         },
  61         /* file system */
  62         {
  63                 .name           = "filesystem",
  64                 .offset         = MTDPART_OFS_APPEND,
  65                 .size           = MTDPART_SIZ_FULL,
  66                 .mask_flags     = 0
  67         }
  68 };
  69
  70 static struct physmap_flash_data davinci_evm_flash_data = {
  71         .width          = 2,
  72         .parts          = davinci_evm_partitions,
  73         .nr_parts       = ARRAY_SIZE(davinci_evm_partitions),
  74 };
  75
  76 /* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
  77  * limits addresses to 16M, so using addresses past 16M will wrap */
  78 static struct resource davinci_evm_flash_resource = {
  79         .start          = NOR_FLASH_PHYS,
  80         .end            = NOR_FLASH_PHYS + SZ_16M - 1,
  81         .flags          = IORESOURCE_MEM,
  82 };
  83
  84 static struct platform_device davinci_evm_flash_device = {
  85         .name           = "physmap-flash",
  86         .id             = 0,
  87         .dev            = {
  88                 .platform_data  = &davinci_evm_flash_data,
  89         },
  90         .num_resources  = 1,
  91         .resource       = &davinci_evm_flash_resource,
  92 };
  93
  94 static struct platform_device *davinci_evm_devices[] __initdata = {
  95         &davinci_evm_flash_device,
  96 };
  97
  98 static void __init
  99 davinci_evm_map_io(void)
 100 {
 101         davinci_map_common_io();
 102 }
 103
 104 static __init void davinci_evm_init(void)
 105 {
 106         davinci_psc_init();
 107
 108 #if defined(CONFIG_BLK_DEV_DAVINCI) || defined(CONFIG_BLK_DEV_DAVINCI_MODULE)
 109         printk(KERN_WARNING "WARNING: both IDE and NOR flash are enabled, "
 110                "but share pins.\n\t Disable IDE for NOR support.\n");
 111 #endif
 112
 113         platform_add_devices(davinci_evm_devices,
 114                              ARRAY_SIZE(davinci_evm_devices));
 115 }
 116
 117 static __init void davinci_evm_irq_init(void)
 118 {
 119         davinci_irq_init();
 120 }
 121
 122 MACHINE_START(DAVINCI_EVM, "DaVinci EVM")
 123         /* Maintainer: MontaVista Software <source@mvista.com> */
 124         .phys_io      = IO_PHYS,
 125         .io_pg_offst  = (io_p2v(IO_PHYS) >> 18) & 0xfffc,
 126         .boot_params  = (DAVINCI_DDR_BASE + 0x100),
 127         .map_io       = davinci_evm_map_io,
 128         .init_irq     = davinci_evm_irq_init,
 129         .timer        = &davinci_timer,
 130         .init_machine = davinci_evm_init,
 131 MACHINE_END