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/platform_device.h> 24 #include <linux/io.h> 25 26 #include <plat/gpio-nomadik.h> 27 #include <mach/hardware.h> 28 #include <mach/irqs.h> 29 #include <asm/mach/map.h> 30 #include <asm/hardware/vic.h> 31 32 #include <asm/cacheflush.h> 33 #include <asm/hardware/cache-l2x0.h> 34 35 #include "clock.h" 36 #include "cpu-8815.h" 37 38 #define __MEM_4K_RESOURCE(x) \ 39 .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM} 40 41 /* The 8815 has 4 GPIO blocks, let's register them immediately */ 42 43 #define GPIO_RESOURCE(block) \ 44 { \ 45 .start = NOMADIK_GPIO##block##_BASE, \ 46 .end = NOMADIK_GPIO##block##_BASE + SZ_4K - 1, \ 47 .flags = IORESOURCE_MEM, \ 48 }, \ 49 { \ 50 .start = IRQ_GPIO##block, \ 51 .end = IRQ_GPIO##block, \ 52 .flags = IORESOURCE_IRQ, \ 53 } 54 55 #define GPIO_DEVICE(block) \ 56 { \ 57 .name = "gpio", \ 58 .id = block, \ 59 .num_resources = 2, \ 60 .resource = &cpu8815_gpio_resources[block * 2], \ 61 .dev = { \ 62 .platform_data = &cpu8815_gpio[block], \ 63 }, \ 64 } 65 66 static struct nmk_gpio_platform_data cpu8815_gpio[] = { 67 { 68 .name = "GPIO-0-31", 69 .first_gpio = 0, 70 .first_irq = NOMADIK_GPIO_TO_IRQ(0), 71 }, { 72 .name = "GPIO-32-63", 73 .first_gpio = 32, 74 .first_irq = NOMADIK_GPIO_TO_IRQ(32), 75 }, { 76 .name = "GPIO-64-95", 77 .first_gpio = 64, 78 .first_irq = NOMADIK_GPIO_TO_IRQ(64), 79 }, { 80 .name = "GPIO-96-127", /* 124..127 not routed to pin */ 81 .first_gpio = 96, 82 .first_irq = NOMADIK_GPIO_TO_IRQ(96), 83 } 84 }; 85 86 static struct resource cpu8815_gpio_resources[] = { 87 GPIO_RESOURCE(0), 88 GPIO_RESOURCE(1), 89 GPIO_RESOURCE(2), 90 GPIO_RESOURCE(3), 91 }; 92 93 static struct platform_device cpu8815_platform_gpio[] = { 94 GPIO_DEVICE(0), 95 GPIO_DEVICE(1), 96 GPIO_DEVICE(2), 97 GPIO_DEVICE(3), 98 }; 99 100 static AMBA_APB_DEVICE(cpu8815_amba_rng, "rng", 0, NOMADIK_RNG_BASE, { }, NULL); 101 102 static struct platform_device *platform_devs[] __initdata = { 103 cpu8815_platform_gpio + 0, 104 cpu8815_platform_gpio + 1, 105 cpu8815_platform_gpio + 2, 106 cpu8815_platform_gpio + 3, 107 }; 108 109 static struct amba_device *amba_devs[] __initdata = { 110 &cpu8815_amba_rng_device 111 }; 112 113 static int __init cpu8815_init(void) 114 { 115 int i; 116 117 platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs)); 118 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) 119 amba_device_register(amba_devs[i], &iomem_resource); 120 return 0; 121 } 122 arch_initcall(cpu8815_init); 123 124 /* All SoC devices live in the same area (see hardware.h) */ 125 static struct map_desc nomadik_io_desc[] __initdata = { 126 { 127 .virtual = NOMADIK_IO_VIRTUAL, 128 .pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL), 129 .length = NOMADIK_IO_SIZE, 130 .type = MT_DEVICE, 131 } 132 /* static ram and secured ram may be added later */ 133 }; 134 135 void __init cpu8815_map_io(void) 136 { 137 iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc)); 138 } 139 140 void __init cpu8815_init_irq(void) 141 { 142 /* This modified VIC cell has two register blocks, at 0 and 0x20 */ 143 vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0); 144 vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0); 145 146 /* 147 * Init clocks here so that they are available for system timer 148 * initialization. 149 */ 150 clk_init(); 151 } 152 153 /* 154 * This function is called from the board init ("init_machine"). 155 */ 156 void __init cpu8815_platform_init(void) 157 { 158 #ifdef CONFIG_CACHE_L2X0 159 /* At full speed latency must be >=2, so 0x249 in low bits */ 160 l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff); 161 #endif 162 return; 163 } 164 165 void cpu8815_restart(char mode, const char *cmd) 166 { 167 void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18); 168 169 /* FIXME: use egpio when implemented */ 170 171 /* Write anything to Reset status register */ 172 writel(1, src_rstsr); 173 } 174