Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-integrator/integrator_cp.c |
| 3 | * |
| 4 | * Copyright (C) 2003 Deep Blue Solutions Ltd |
| 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. |
| 9 | */ |
| 10 | #include <linux/types.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/list.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 14 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/string.h> |
Kay Sievers | edbaa60 | 2011-12-21 16:26:03 -0800 | [diff] [blame] | 17 | #include <linux/device.h> |
Russell King | a62c80e | 2006-01-07 13:52:45 +0000 | [diff] [blame] | 18 | #include <linux/amba/bus.h> |
| 19 | #include <linux/amba/kmi.h> |
| 20 | #include <linux/amba/clcd.h> |
Linus Walleij | 11c32d7 | 2014-05-22 23:25:14 +0200 | [diff] [blame] | 21 | #include <linux/platform_data/video-clcd-versatile.h> |
Linus Walleij | 6ef297f | 2009-09-22 14:29:36 +0100 | [diff] [blame] | 22 | #include <linux/amba/mmci.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 23 | #include <linux/io.h> |
Rob Herring | 44fa72d | 2014-05-29 16:44:27 -0500 | [diff] [blame] | 24 | #include <linux/irqchip.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/gfp.h> |
Linus Walleij | 4980f9b | 2012-09-06 09:08:24 +0100 | [diff] [blame] | 26 | #include <linux/of_irq.h> |
| 27 | #include <linux/of_address.h> |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 28 | #include <linux/of_platform.h> |
Linus Walleij | a79528e | 2014-02-13 21:35:07 +0100 | [diff] [blame] | 29 | #include <linux/sched_clock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/setup.h> |
| 32 | #include <asm/mach-types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/mach/arch.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <asm/mach/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/mach/map.h> |
| 36 | #include <asm/mach/time.h> |
| 37 | |
Linus Walleij | 1b1ef75 | 2014-02-13 21:26:24 +0100 | [diff] [blame] | 38 | #include "hardware.h" |
Linus Walleij | bb4dbef | 2013-06-16 02:44:27 +0200 | [diff] [blame] | 39 | #include "cm.h" |
Russell King | 98c672c | 2010-05-22 18:18:57 +0100 | [diff] [blame] | 40 | #include "common.h" |
| 41 | |
Linus Walleij | e6fae08 | 2012-11-04 21:03:02 +0100 | [diff] [blame] | 42 | /* Base address to the CP controller */ |
| 43 | static void __iomem *intcp_con_base; |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define INTCP_PA_CLCD_BASE 0xc0000000 |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | /* |
| 48 | * Logical Physical |
Linus Walleij | 608914b | 2014-01-24 14:04:28 +0100 | [diff] [blame] | 49 | * f1000000 10000000 Core module registers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | * f1300000 13000000 Counter/Timer |
| 51 | * f1400000 14000000 Interrupt controller |
| 52 | * f1600000 16000000 UART 0 |
| 53 | * f1700000 17000000 UART 1 |
| 54 | * f1a00000 1a000000 Debug LEDs |
Russell King | da7ba95 | 2010-01-17 19:59:58 +0000 | [diff] [blame] | 55 | * fc900000 c9000000 GPIO |
| 56 | * fca00000 ca000000 SIC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | */ |
| 58 | |
Arnd Bergmann | 060fd1b | 2013-02-14 13:50:57 +0100 | [diff] [blame] | 59 | static struct map_desc intcp_io_desc[] __initdata __maybe_unused = { |
Deepak Saxena | c8d2729 | 2005-10-28 15:19:10 +0100 | [diff] [blame] | 60 | { |
Linus Walleij | 608914b | 2014-01-24 14:04:28 +0100 | [diff] [blame] | 61 | .virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE), |
| 62 | .pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE), |
| 63 | .length = SZ_4K, |
| 64 | .type = MT_DEVICE |
| 65 | }, { |
Deepak Saxena | c8d2729 | 2005-10-28 15:19:10 +0100 | [diff] [blame] | 66 | .virtual = IO_ADDRESS(INTEGRATOR_CT_BASE), |
| 67 | .pfn = __phys_to_pfn(INTEGRATOR_CT_BASE), |
| 68 | .length = SZ_4K, |
| 69 | .type = MT_DEVICE |
| 70 | }, { |
| 71 | .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE), |
| 72 | .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE), |
| 73 | .length = SZ_4K, |
| 74 | .type = MT_DEVICE |
| 75 | }, { |
| 76 | .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE), |
| 77 | .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE), |
| 78 | .length = SZ_4K, |
| 79 | .type = MT_DEVICE |
| 80 | }, { |
Deepak Saxena | c8d2729 | 2005-10-28 15:19:10 +0100 | [diff] [blame] | 81 | .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE), |
| 82 | .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE), |
| 83 | .length = SZ_4K, |
| 84 | .type = MT_DEVICE |
| 85 | }, { |
Russell King | da7ba95 | 2010-01-17 19:59:58 +0000 | [diff] [blame] | 86 | .virtual = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE), |
| 87 | .pfn = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE), |
Deepak Saxena | c8d2729 | 2005-10-28 15:19:10 +0100 | [diff] [blame] | 88 | .length = SZ_4K, |
| 89 | .type = MT_DEVICE |
| 90 | }, { |
Russell King | da7ba95 | 2010-01-17 19:59:58 +0000 | [diff] [blame] | 91 | .virtual = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE), |
| 92 | .pfn = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE), |
Deepak Saxena | c8d2729 | 2005-10-28 15:19:10 +0100 | [diff] [blame] | 93 | .length = SZ_4K, |
| 94 | .type = MT_DEVICE |
Deepak Saxena | c8d2729 | 2005-10-28 15:19:10 +0100 | [diff] [blame] | 95 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | }; |
| 97 | |
| 98 | static void __init intcp_map_io(void) |
| 99 | { |
| 100 | iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc)); |
| 101 | } |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | * It seems that the card insertion interrupt remains active after |
| 105 | * we've acknowledged it. We therefore ignore the interrupt, and |
| 106 | * rely on reading it from the SIC. This also means that we must |
| 107 | * clear the latched interrupt. |
| 108 | */ |
| 109 | static unsigned int mmc_status(struct device *dev) |
| 110 | { |
Arnd Bergmann | b7a3f8d | 2012-09-14 20:16:39 +0000 | [diff] [blame] | 111 | unsigned int status = readl(__io_address(0xca000000 + 4)); |
Linus Walleij | e6fae08 | 2012-11-04 21:03:02 +0100 | [diff] [blame] | 112 | writel(8, intcp_con_base + 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | return status & 8; |
| 115 | } |
| 116 | |
Linus Walleij | 6ef297f | 2009-09-22 14:29:36 +0100 | [diff] [blame] | 117 | static struct mmci_platform_data mmc_data = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, |
| 119 | .status = mmc_status, |
Russell King | 7fb2bbf | 2009-07-09 15:15:12 +0100 | [diff] [blame] | 120 | .gpio_wp = -1, |
| 121 | .gpio_cd = -1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | /* |
| 125 | * CLCD support |
| 126 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | /* |
| 128 | * Ensure VGA is selected. |
| 129 | */ |
| 130 | static void cp_clcd_enable(struct clcd_fb *fb) |
| 131 | { |
Russell King | e6b9c1f | 2011-01-22 11:02:10 +0000 | [diff] [blame] | 132 | struct fb_var_screeninfo *var = &fb->fb.var; |
Jonathan Austin | 30aeadd | 2013-08-29 18:41:11 +0100 | [diff] [blame] | 133 | u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2 |
| 134 | | CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1; |
Russell King | 4774e22 | 2005-04-30 23:32:38 +0100 | [diff] [blame] | 135 | |
Russell King | e6b9c1f | 2011-01-22 11:02:10 +0000 | [diff] [blame] | 136 | if (var->bits_per_pixel <= 8 || |
| 137 | (var->bits_per_pixel == 16 && var->green.length == 5)) |
| 138 | /* Pseudocolor, RGB555, BGR555 */ |
| 139 | val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555; |
Russell King | 4774e22 | 2005-04-30 23:32:38 +0100 | [diff] [blame] | 140 | else if (fb->fb.var.bits_per_pixel <= 16) |
Russell King | e6b9c1f | 2011-01-22 11:02:10 +0000 | [diff] [blame] | 141 | /* truecolor RGB565 */ |
| 142 | val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555; |
Russell King | 4774e22 | 2005-04-30 23:32:38 +0100 | [diff] [blame] | 143 | else |
| 144 | val = 0; /* no idea for this, don't trust the docs */ |
| 145 | |
| 146 | cm_control(CM_CTRL_LCDMUXSEL_MASK| |
| 147 | CM_CTRL_LCDEN0| |
| 148 | CM_CTRL_LCDEN1| |
| 149 | CM_CTRL_STATIC1| |
| 150 | CM_CTRL_STATIC2| |
| 151 | CM_CTRL_STATIC| |
| 152 | CM_CTRL_n24BITEN, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | static int cp_clcd_setup(struct clcd_fb *fb) |
| 156 | { |
Russell King | 9dfec4f | 2011-01-18 20:10:10 +0000 | [diff] [blame] | 157 | fb->panel = versatile_clcd_get_panel("VGA"); |
| 158 | if (!fb->panel) |
| 159 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
Russell King | 9dfec4f | 2011-01-18 20:10:10 +0000 | [diff] [blame] | 161 | return versatile_clcd_setup_dma(fb, SZ_1M); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | static struct clcd_board clcd_data = { |
| 165 | .name = "Integrator/CP", |
Russell King | 9dfec4f | 2011-01-18 20:10:10 +0000 | [diff] [blame] | 166 | .caps = CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | .check = clcdfb_check, |
| 168 | .decode = clcdfb_decode, |
| 169 | .enable = cp_clcd_enable, |
| 170 | .setup = cp_clcd_setup, |
Russell King | 9dfec4f | 2011-01-18 20:10:10 +0000 | [diff] [blame] | 171 | .mmap = versatile_clcd_mmap_dma, |
| 172 | .remove = versatile_clcd_remove_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | }; |
| 174 | |
Russell King | d77e270 | 2011-01-22 11:37:54 +0000 | [diff] [blame] | 175 | #define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28) |
| 176 | |
Linus Walleij | a79528e | 2014-02-13 21:35:07 +0100 | [diff] [blame] | 177 | static u64 notrace intcp_read_sched_clock(void) |
| 178 | { |
| 179 | return readl(REFCOUNTER); |
| 180 | } |
| 181 | |
Russell King | c735c98 | 2011-01-11 13:00:04 +0000 | [diff] [blame] | 182 | static void __init intcp_init_early(void) |
| 183 | { |
Linus Walleij | a79528e | 2014-02-13 21:35:07 +0100 | [diff] [blame] | 184 | sched_clock_register(intcp_read_sched_clock, 32, 24000000); |
Russell King | c735c98 | 2011-01-11 13:00:04 +0000 | [diff] [blame] | 185 | } |
| 186 | |
Linus Walleij | 4980f9b | 2012-09-06 09:08:24 +0100 | [diff] [blame] | 187 | static void __init intcp_init_irq_of(void) |
| 188 | { |
Linus Walleij | bb4dbef | 2013-06-16 02:44:27 +0200 | [diff] [blame] | 189 | cm_init(); |
Rob Herring | 44fa72d | 2014-05-29 16:44:27 -0500 | [diff] [blame] | 190 | irqchip_init(); |
Linus Walleij | 4980f9b | 2012-09-06 09:08:24 +0100 | [diff] [blame] | 191 | } |
| 192 | |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 193 | /* |
| 194 | * For the Device Tree, add in the UART, MMC and CLCD specifics as AUXDATA |
| 195 | * and enforce the bus names since these are used for clock lookups. |
| 196 | */ |
| 197 | static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = { |
| 198 | OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE, |
| 199 | "rtc", NULL), |
| 200 | OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE, |
Linus Walleij | 379df27 | 2012-11-17 19:24:23 +0100 | [diff] [blame] | 201 | "uart0", NULL), |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 202 | OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE, |
Linus Walleij | 379df27 | 2012-11-17 19:24:23 +0100 | [diff] [blame] | 203 | "uart1", NULL), |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 204 | OF_DEV_AUXDATA("arm,primecell", KMI0_BASE, |
| 205 | "kmi0", NULL), |
| 206 | OF_DEV_AUXDATA("arm,primecell", KMI1_BASE, |
| 207 | "kmi1", NULL), |
| 208 | OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_MMC_BASE, |
| 209 | "mmci", &mmc_data), |
| 210 | OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_AACI_BASE, |
| 211 | "aaci", &mmc_data), |
| 212 | OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE, |
| 213 | "clcd", &clcd_data), |
| 214 | { /* sentinel */ }, |
| 215 | }; |
| 216 | |
Linus Walleij | df36680 | 2013-10-10 18:24:58 +0200 | [diff] [blame] | 217 | static const struct of_device_id intcp_syscon_match[] = { |
| 218 | { .compatible = "arm,integrator-cp-syscon"}, |
| 219 | { }, |
| 220 | }; |
| 221 | |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 222 | static void __init intcp_init_of(void) |
| 223 | { |
Linus Walleij | 64100a0 | 2012-11-02 01:20:43 +0100 | [diff] [blame] | 224 | struct device_node *cpcon; |
Linus Walleij | 64100a0 | 2012-11-02 01:20:43 +0100 | [diff] [blame] | 225 | |
Linus Walleij | 11f9323 | 2014-06-24 14:08:07 +0200 | [diff] [blame] | 226 | cpcon = of_find_matching_node(NULL, intcp_syscon_match); |
Linus Walleij | 64100a0 | 2012-11-02 01:20:43 +0100 | [diff] [blame] | 227 | if (!cpcon) |
| 228 | return; |
| 229 | |
| 230 | intcp_con_base = of_iomap(cpcon, 0); |
| 231 | if (!intcp_con_base) |
| 232 | return; |
| 233 | |
Kefeng Wang | 435ebcb | 2016-06-01 14:53:05 +0800 | [diff] [blame^] | 234 | of_platform_default_populate(NULL, intcp_auxdata_lookup, NULL); |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 235 | } |
| 236 | |
Linus Walleij | 4980f9b | 2012-09-06 09:08:24 +0100 | [diff] [blame] | 237 | static const char * intcp_dt_board_compat[] = { |
| 238 | "arm,integrator-cp", |
| 239 | NULL, |
| 240 | }; |
| 241 | |
| 242 | DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)") |
| 243 | .reserve = integrator_reserve, |
| 244 | .map_io = intcp_map_io, |
Linus Walleij | 4980f9b | 2012-09-06 09:08:24 +0100 | [diff] [blame] | 245 | .init_early = intcp_init_early, |
| 246 | .init_irq = intcp_init_irq_of, |
Linus Walleij | 4672cdd | 2012-09-06 09:08:47 +0100 | [diff] [blame] | 247 | .init_machine = intcp_init_of, |
Linus Walleij | 4980f9b | 2012-09-06 09:08:24 +0100 | [diff] [blame] | 248 | .dt_compat = intcp_dt_board_compat, |
| 249 | MACHINE_END |