arch/arm/mach-nomadik/cpu-8815.c

   1 /*
   2  * Copyright STMicroelectronics, 2007.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <linux/types.h>
  20 #include <linux/init.h>
  21 #include <linux/device.h>
  22 #include <linux/amba/bus.h>
  23 #include <linux/gpio.h>
  24
  25 #include <mach/hardware.h>
  26 #include <mach/irqs.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/hardware/vic.h>
  29
  30 #include <asm/cacheflush.h>
  31 #include <asm/hardware/cache-l2x0.h>
  32
  33 /* The 8815 has 4 GPIO blocks, let's register them immediately */
  34 static struct nmk_gpio_platform_data cpu8815_gpio[] = {
  35         {
  36                 .name = "GPIO-0-31",
  37                 .first_gpio = 0,
  38                 .first_irq = NOMADIK_GPIO_TO_IRQ(0),
  39                 .parent_irq = IRQ_GPIO0,
  40         }, {
  41                 .name = "GPIO-32-63",
  42                 .first_gpio = 32,
  43                 .first_irq = NOMADIK_GPIO_TO_IRQ(32),
  44                 .parent_irq = IRQ_GPIO1,
  45         }, {
  46                 .name = "GPIO-64-95",
  47                 .first_gpio = 64,
  48                 .first_irq = NOMADIK_GPIO_TO_IRQ(64),
  49                 .parent_irq = IRQ_GPIO2,
  50         }, {
  51                 .name = "GPIO-96-127", /* 124..127 not routed to pin */
  52                 .first_gpio = 96,
  53                 .first_irq = NOMADIK_GPIO_TO_IRQ(96),
  54                 .parent_irq = IRQ_GPIO3,
  55         }
  56 };
  57
  58 #define __MEM_4K_RESOURCE(x) \
  59         .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
  60
  61 static struct amba_device cpu8815_amba_gpio[] = {
  62         {
  63                 .dev = {
  64                         .init_name = "gpio0",
  65                         .platform_data = cpu8815_gpio + 0,
  66                 },
  67                 __MEM_4K_RESOURCE(NOMADIK_GPIO0_BASE),
  68         }, {
  69                 .dev = {
  70                         .init_name = "gpio1",
  71                         .platform_data = cpu8815_gpio + 1,
  72                 },
  73                 __MEM_4K_RESOURCE(NOMADIK_GPIO1_BASE),
  74         }, {
  75                 .dev = {
  76                         .init_name = "gpio2",
  77                         .platform_data = cpu8815_gpio + 2,
  78                 },
  79                 __MEM_4K_RESOURCE(NOMADIK_GPIO2_BASE),
  80         }, {
  81                 .dev = {
  82                         .init_name = "gpio3",
  83                         .platform_data = cpu8815_gpio + 3,
  84                 },
  85                 __MEM_4K_RESOURCE(NOMADIK_GPIO3_BASE),
  86         },
  87 };
  88
  89 static struct amba_device *amba_devs[] __initdata = {
  90         cpu8815_amba_gpio + 0,
  91         cpu8815_amba_gpio + 1,
  92         cpu8815_amba_gpio + 2,
  93         cpu8815_amba_gpio + 3,
  94 };
  95
  96 static int __init cpu8815_init(void)
  97 {
  98         int i;
  99
 100         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 101                 amba_device_register(amba_devs[i], &iomem_resource);
 102         return 0;
 103 }
 104 arch_initcall(cpu8815_init);
 105
 106 /* All SoC devices live in the same area (see hardware.h) */
 107 static struct map_desc nomadik_io_desc[] __initdata = {
 108         {
 109                 .virtual =      NOMADIK_IO_VIRTUAL,
 110                 .pfn =          __phys_to_pfn(NOMADIK_IO_PHYSICAL),
 111                 .length =       NOMADIK_IO_SIZE,
 112                 .type =         MT_DEVICE,
 113         }
 114         /* static ram and secured ram may be added later */
 115 };
 116
 117 void __init cpu8815_map_io(void)
 118 {
 119         iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
 120 }
 121
 122 void __init cpu8815_init_irq(void)
 123 {
 124         /* This modified VIC cell has two register blocks, at 0 and 0x20 */
 125         vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
 126         vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
 127 }
 128
 129 /*
 130  * This function is called from the board init ("init_machine").
 131  */
 132  void __init cpu8815_platform_init(void)
 133 {
 134 #ifdef CONFIG_CACHE_L2X0
 135         /* At full speed latency must be >=2, so 0x249 in low bits */
 136         l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
 137 #endif
 138          return;
 139 }