Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-vt8500/vt8500.c |
| 3 | * |
| 4 | * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
Tony Prisk | 41d1651 | 2013-01-15 19:50:49 +1300 | [diff] [blame] | 21 | #include <linux/clocksource.h> |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 22 | #include <linux/io.h> |
| 23 | #include <linux/pm.h> |
| 24 | |
| 25 | #include <asm/mach-types.h> |
| 26 | #include <asm/mach/arch.h> |
| 27 | #include <asm/mach/time.h> |
| 28 | #include <asm/mach/map.h> |
| 29 | |
| 30 | #include <linux/of.h> |
| 31 | #include <linux/of_address.h> |
| 32 | #include <linux/of_irq.h> |
| 33 | #include <linux/of_platform.h> |
| 34 | |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 35 | #include "common.h" |
| 36 | |
| 37 | #define LEGACY_GPIO_BASE 0xD8110000 |
| 38 | #define LEGACY_PMC_BASE 0xD8130000 |
| 39 | |
| 40 | /* Registers in GPIO Controller */ |
| 41 | #define VT8500_GPIO_MUX_REG 0x200 |
| 42 | |
| 43 | /* Registers in Power Management Controller */ |
| 44 | #define VT8500_HCR_REG 0x12 |
| 45 | #define VT8500_PMSR_REG 0x60 |
| 46 | |
| 47 | static void __iomem *pmc_base; |
| 48 | |
| 49 | void vt8500_restart(char mode, const char *cmd) |
| 50 | { |
| 51 | if (pmc_base) |
| 52 | writel(1, pmc_base + VT8500_PMSR_REG); |
| 53 | } |
| 54 | |
| 55 | static struct map_desc vt8500_io_desc[] __initdata = { |
| 56 | /* SoC MMIO registers */ |
| 57 | [0] = { |
| 58 | .virtual = 0xf8000000, |
| 59 | .pfn = __phys_to_pfn(0xd8000000), |
| 60 | .length = 0x00390000, /* max of all chip variants */ |
| 61 | .type = MT_DEVICE |
| 62 | }, |
| 63 | }; |
| 64 | |
| 65 | void __init vt8500_map_io(void) |
| 66 | { |
| 67 | iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc)); |
| 68 | } |
| 69 | |
| 70 | static void vt8500_power_off(void) |
| 71 | { |
| 72 | local_irq_disable(); |
| 73 | writew(5, pmc_base + VT8500_HCR_REG); |
| 74 | asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0)); |
| 75 | } |
| 76 | |
| 77 | void __init vt8500_init(void) |
| 78 | { |
Tony Prisk | a4ee777 | 2012-10-07 14:02:14 +1300 | [diff] [blame] | 79 | struct device_node *np; |
| 80 | #if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505) |
| 81 | struct device_node *fb; |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 82 | void __iomem *gpio_base; |
Tony Prisk | a4ee777 | 2012-10-07 14:02:14 +1300 | [diff] [blame] | 83 | #endif |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 84 | |
| 85 | #ifdef CONFIG_FB_VT8500 |
| 86 | fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb"); |
| 87 | if (fb) { |
| 88 | np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio"); |
| 89 | if (np) { |
| 90 | gpio_base = of_iomap(np, 0); |
| 91 | |
| 92 | if (!gpio_base) |
| 93 | pr_err("%s: of_iomap(gpio_mux) failed\n", |
| 94 | __func__); |
| 95 | |
| 96 | of_node_put(np); |
| 97 | } else { |
| 98 | gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000); |
| 99 | if (!gpio_base) |
| 100 | pr_err("%s: ioremap(legacy_gpio_mux) failed\n", |
| 101 | __func__); |
| 102 | } |
| 103 | if (gpio_base) { |
| 104 | writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1, |
| 105 | gpio_base + VT8500_GPIO_MUX_REG); |
| 106 | iounmap(gpio_base); |
| 107 | } else |
| 108 | pr_err("%s: Could not remap GPIO mux\n", __func__); |
| 109 | |
| 110 | of_node_put(fb); |
| 111 | } |
| 112 | #endif |
| 113 | |
| 114 | #ifdef CONFIG_FB_WM8505 |
| 115 | fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb"); |
| 116 | if (fb) { |
| 117 | np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio"); |
| 118 | if (!np) |
| 119 | np = of_find_compatible_node(NULL, NULL, |
| 120 | "wm,wm8650-gpio"); |
| 121 | if (np) { |
| 122 | gpio_base = of_iomap(np, 0); |
| 123 | |
| 124 | if (!gpio_base) |
| 125 | pr_err("%s: of_iomap(gpio_mux) failed\n", |
| 126 | __func__); |
| 127 | |
| 128 | of_node_put(np); |
| 129 | } else { |
| 130 | gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000); |
| 131 | if (!gpio_base) |
| 132 | pr_err("%s: ioremap(legacy_gpio_mux) failed\n", |
| 133 | __func__); |
| 134 | } |
| 135 | if (gpio_base) { |
| 136 | writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | |
| 137 | 0x80000000, gpio_base + VT8500_GPIO_MUX_REG); |
| 138 | iounmap(gpio_base); |
| 139 | } else |
| 140 | pr_err("%s: Could not remap GPIO mux\n", __func__); |
| 141 | |
| 142 | of_node_put(fb); |
| 143 | } |
| 144 | #endif |
| 145 | |
| 146 | np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc"); |
| 147 | if (np) { |
| 148 | pmc_base = of_iomap(np, 0); |
| 149 | |
| 150 | if (!pmc_base) |
| 151 | pr_err("%s:of_iomap(pmc) failed\n", __func__); |
| 152 | |
| 153 | of_node_put(np); |
| 154 | } else { |
| 155 | pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000); |
| 156 | if (!pmc_base) |
| 157 | pr_err("%s:ioremap(power_off) failed\n", __func__); |
| 158 | } |
| 159 | if (pmc_base) |
| 160 | pm_power_off = &vt8500_power_off; |
| 161 | else |
| 162 | pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__); |
| 163 | |
| 164 | vtwm_clk_init(pmc_base); |
| 165 | |
| 166 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
| 167 | } |
| 168 | |
| 169 | static const struct of_device_id vt8500_irq_match[] __initconst = { |
| 170 | { .compatible = "via,vt8500-intc", .data = vt8500_irq_init, }, |
| 171 | { /* sentinel */ }, |
| 172 | }; |
| 173 | |
| 174 | static void __init vt8500_init_irq(void) |
| 175 | { |
| 176 | of_irq_init(vt8500_irq_match); |
| 177 | }; |
| 178 | |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 179 | static const char * const vt8500_dt_compat[] = { |
| 180 | "via,vt8500", |
| 181 | "wm,wm8650", |
| 182 | "wm,wm8505", |
Tony Prisk | 8d31bfa | 2013-01-12 15:51:24 +1300 | [diff] [blame] | 183 | "wm,wm8750", |
| 184 | "wm,wm8850", |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 185 | }; |
| 186 | |
| 187 | DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)") |
| 188 | .dt_compat = vt8500_dt_compat, |
| 189 | .map_io = vt8500_map_io, |
| 190 | .init_irq = vt8500_init_irq, |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 191 | .init_machine = vt8500_init, |
Tony Prisk | 41d1651 | 2013-01-15 19:50:49 +1300 | [diff] [blame] | 192 | .init_time = clocksource_of_init, |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 193 | .restart = vt8500_restart, |
Tony Prisk | 0c464d5 | 2012-10-10 20:59:32 +1300 | [diff] [blame] | 194 | .handle_irq = vt8500_handle_irq, |
Tony Prisk | e9a91de | 2012-08-03 21:00:06 +1200 | [diff] [blame] | 195 | MACHINE_END |
| 196 | |