Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/plat-omap/sram.c |
| 3 | * |
| 4 | * OMAP SRAM detection and management |
| 5 | * |
| 6 | * Copyright (C) 2005 Nokia Corporation |
| 7 | * Written by Tony Lindgren <tony@atomide.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | |
Tony Lindgren | 53d9cc7 | 2006-02-08 22:06:45 +0000 | [diff] [blame] | 18 | #include <asm/tlb.h> |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 19 | #include <asm/io.h> |
| 20 | #include <asm/cacheflush.h> |
| 21 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 22 | #include <asm/mach/map.h> |
| 23 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 24 | #include <asm/arch/sram.h> |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 25 | #include <asm/arch/board.h> |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 26 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 27 | #define OMAP1_SRAM_PA 0x20000000 |
| 28 | #define OMAP1_SRAM_VA 0xd0000000 |
| 29 | #define OMAP2_SRAM_PA 0x40200000 |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 30 | #define OMAP2_SRAM_PUB_PA 0x4020f800 |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 31 | #define OMAP2_SRAM_VA 0xd0000000 |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 32 | #define OMAP2_SRAM_PUB_VA 0xd0000800 |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 33 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 34 | #if defined(CONFIG_ARCH_OMAP24XX) |
| 35 | #define SRAM_BOOTLOADER_SZ 0x00 |
| 36 | #else |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 37 | #define SRAM_BOOTLOADER_SZ 0x80 |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 38 | #endif |
| 39 | |
| 40 | #define VA_REQINFOPERM0 IO_ADDRESS(0x68005048) |
| 41 | #define VA_READPERM0 IO_ADDRESS(0x68005050) |
| 42 | #define VA_WRITEPERM0 IO_ADDRESS(0x68005058) |
| 43 | #define VA_CONTROL_STAT IO_ADDRESS(0x480002F8) |
| 44 | #define GP_DEVICE 0x300 |
| 45 | #define TYPE_MASK 0x700 |
| 46 | |
| 47 | #define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1))) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 48 | |
Tony Lindgren | c40fae95 | 2006-12-07 13:58:10 -0800 | [diff] [blame] | 49 | static unsigned long omap_sram_start; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 50 | static unsigned long omap_sram_base; |
| 51 | static unsigned long omap_sram_size; |
| 52 | static unsigned long omap_sram_ceil; |
| 53 | |
Imre Deak | b7cc6d4 | 2007-03-06 03:16:36 -0800 | [diff] [blame] | 54 | extern unsigned long omapfb_reserve_sram(unsigned long sram_pstart, |
| 55 | unsigned long sram_vstart, |
| 56 | unsigned long sram_size, |
| 57 | unsigned long pstart_avail, |
| 58 | unsigned long size_avail); |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 59 | |
Imre Deak | b7cc6d4 | 2007-03-06 03:16:36 -0800 | [diff] [blame] | 60 | /* |
| 61 | * Depending on the target RAMFS firewall setup, the public usable amount of |
Simon Arlott | 6cbdc8c | 2007-05-11 20:40:30 +0100 | [diff] [blame] | 62 | * SRAM varies. The default accessible size for all device types is 2k. A GP |
| 63 | * device allows ARM11 but not other initiators for full size. This |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 64 | * functionality seems ok until some nice security API happens. |
| 65 | */ |
| 66 | static int is_sram_locked(void) |
| 67 | { |
| 68 | int type = 0; |
| 69 | |
| 70 | if (cpu_is_omap242x()) |
| 71 | type = __raw_readl(VA_CONTROL_STAT) & TYPE_MASK; |
| 72 | |
| 73 | if (type == GP_DEVICE) { |
Simon Arlott | 6cbdc8c | 2007-05-11 20:40:30 +0100 | [diff] [blame] | 74 | /* RAMFW: R/W access to all initiators for all qualifier sets */ |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 75 | if (cpu_is_omap242x()) { |
| 76 | __raw_writel(0xFF, VA_REQINFOPERM0); /* all q-vects */ |
| 77 | __raw_writel(0xCFDE, VA_READPERM0); /* all i-read */ |
| 78 | __raw_writel(0xCFDE, VA_WRITEPERM0); /* all i-write */ |
| 79 | } |
| 80 | return 0; |
| 81 | } else |
| 82 | return 1; /* assume locked with no PPA or security driver */ |
| 83 | } |
| 84 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 85 | /* |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 86 | * The amount of SRAM depends on the core type. |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 87 | * Note that we cannot try to test for SRAM here because writes |
| 88 | * to secure SRAM will hang the system. Also the SRAM is not |
| 89 | * yet mapped at this point. |
| 90 | */ |
| 91 | void __init omap_detect_sram(void) |
| 92 | { |
Imre Deak | b7cc6d4 | 2007-03-06 03:16:36 -0800 | [diff] [blame] | 93 | unsigned long reserved; |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 94 | |
| 95 | if (cpu_is_omap24xx()) { |
| 96 | if (is_sram_locked()) { |
| 97 | omap_sram_base = OMAP2_SRAM_PUB_VA; |
Tony Lindgren | c40fae95 | 2006-12-07 13:58:10 -0800 | [diff] [blame] | 98 | omap_sram_start = OMAP2_SRAM_PUB_PA; |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 99 | omap_sram_size = 0x800; /* 2K */ |
| 100 | } else { |
| 101 | omap_sram_base = OMAP2_SRAM_VA; |
Tony Lindgren | c40fae95 | 2006-12-07 13:58:10 -0800 | [diff] [blame] | 102 | omap_sram_start = OMAP2_SRAM_PA; |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 103 | if (cpu_is_omap242x()) |
| 104 | omap_sram_size = 0xa0000; /* 640K */ |
| 105 | else if (cpu_is_omap243x()) |
| 106 | omap_sram_size = 0x10000; /* 64K */ |
| 107 | } |
| 108 | } else { |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 109 | omap_sram_base = OMAP1_SRAM_VA; |
Tony Lindgren | c40fae95 | 2006-12-07 13:58:10 -0800 | [diff] [blame] | 110 | omap_sram_start = OMAP1_SRAM_PA; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 111 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 112 | if (cpu_is_omap730()) |
| 113 | omap_sram_size = 0x32000; /* 200K */ |
| 114 | else if (cpu_is_omap15xx()) |
| 115 | omap_sram_size = 0x30000; /* 192K */ |
| 116 | else if (cpu_is_omap1610() || cpu_is_omap1621() || |
| 117 | cpu_is_omap1710()) |
| 118 | omap_sram_size = 0x4000; /* 16K */ |
| 119 | else if (cpu_is_omap1611()) |
| 120 | omap_sram_size = 0x3e800; /* 250K */ |
| 121 | else { |
| 122 | printk(KERN_ERR "Could not detect SRAM size\n"); |
| 123 | omap_sram_size = 0x4000; |
| 124 | } |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 125 | } |
Imre Deak | b7cc6d4 | 2007-03-06 03:16:36 -0800 | [diff] [blame] | 126 | reserved = omapfb_reserve_sram(omap_sram_start, omap_sram_base, |
| 127 | omap_sram_size, |
| 128 | omap_sram_start + SRAM_BOOTLOADER_SZ, |
| 129 | omap_sram_size - SRAM_BOOTLOADER_SZ); |
| 130 | omap_sram_size -= reserved; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 131 | omap_sram_ceil = omap_sram_base + omap_sram_size; |
| 132 | } |
| 133 | |
| 134 | static struct map_desc omap_sram_io_desc[] __initdata = { |
Deepak Saxena | 9fe133b | 2005-10-28 15:19:00 +0100 | [diff] [blame] | 135 | { /* .length gets filled in at runtime */ |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 136 | .virtual = OMAP1_SRAM_VA, |
| 137 | .pfn = __phys_to_pfn(OMAP1_SRAM_PA), |
Tony Lindgren | ce2deca | 2006-06-26 16:16:24 -0700 | [diff] [blame] | 138 | .type = MT_MEMORY |
Deepak Saxena | 9fe133b | 2005-10-28 15:19:00 +0100 | [diff] [blame] | 139 | } |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | /* |
Tony Lindgren | ce2deca | 2006-06-26 16:16:24 -0700 | [diff] [blame] | 143 | * Note that we cannot use ioremap for SRAM, as clock init needs SRAM early. |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 144 | */ |
| 145 | void __init omap_map_sram(void) |
| 146 | { |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 147 | unsigned long base; |
| 148 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 149 | if (omap_sram_size == 0) |
| 150 | return; |
| 151 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 152 | if (cpu_is_omap24xx()) { |
| 153 | omap_sram_io_desc[0].virtual = OMAP2_SRAM_VA; |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 154 | |
Kevin Hilman | d1284b5 | 2006-09-25 12:41:24 +0300 | [diff] [blame] | 155 | base = OMAP2_SRAM_PA; |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 156 | base = ROUND_DOWN(base, PAGE_SIZE); |
| 157 | omap_sram_io_desc[0].pfn = __phys_to_pfn(base); |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 158 | } |
| 159 | |
Tony Lindgren | ce2deca | 2006-06-26 16:16:24 -0700 | [diff] [blame] | 160 | omap_sram_io_desc[0].length = 1024 * 1024; /* Use section desc */ |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 161 | iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc)); |
| 162 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 163 | printk(KERN_INFO "SRAM: Mapped pa 0x%08lx to va 0x%08lx size: 0x%lx\n", |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 164 | __pfn_to_phys(omap_sram_io_desc[0].pfn), |
| 165 | omap_sram_io_desc[0].virtual, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 166 | omap_sram_io_desc[0].length); |
| 167 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 168 | /* |
Tony Lindgren | 53d9cc7 | 2006-02-08 22:06:45 +0000 | [diff] [blame] | 169 | * Normally devicemaps_init() would flush caches and tlb after |
| 170 | * mdesc->map_io(), but since we're called from map_io(), we |
| 171 | * must do it here. |
| 172 | */ |
| 173 | local_flush_tlb_all(); |
| 174 | flush_cache_all(); |
| 175 | |
| 176 | /* |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 177 | * Looks like we need to preserve some bootloader code at the |
| 178 | * beginning of SRAM for jumping to flash for reboot to work... |
| 179 | */ |
| 180 | memset((void *)omap_sram_base + SRAM_BOOTLOADER_SZ, 0, |
| 181 | omap_sram_size - SRAM_BOOTLOADER_SZ); |
| 182 | } |
| 183 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 184 | void * omap_sram_push(void * start, unsigned long size) |
| 185 | { |
| 186 | if (size > (omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ))) { |
| 187 | printk(KERN_ERR "Not enough space in SRAM\n"); |
| 188 | return NULL; |
| 189 | } |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 190 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 191 | omap_sram_ceil -= size; |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 192 | omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, sizeof(void *)); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 193 | memcpy((void *)omap_sram_ceil, start, size); |
| 194 | |
| 195 | return (void *)omap_sram_ceil; |
| 196 | } |
| 197 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 198 | static void omap_sram_error(void) |
| 199 | { |
| 200 | panic("Uninitialized SRAM function\n"); |
| 201 | } |
| 202 | |
| 203 | #ifdef CONFIG_ARCH_OMAP1 |
| 204 | |
| 205 | static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl); |
| 206 | |
| 207 | void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl) |
| 208 | { |
| 209 | if (!_omap_sram_reprogram_clock) |
| 210 | omap_sram_error(); |
| 211 | |
| 212 | return _omap_sram_reprogram_clock(dpllctl, ckctl); |
| 213 | } |
| 214 | |
| 215 | int __init omap1_sram_init(void) |
| 216 | { |
| 217 | _omap_sram_reprogram_clock = omap_sram_push(sram_reprogram_clock, |
| 218 | sram_reprogram_clock_sz); |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | #else |
| 224 | #define omap1_sram_init() do {} while (0) |
| 225 | #endif |
| 226 | |
| 227 | #ifdef CONFIG_ARCH_OMAP2 |
| 228 | |
| 229 | static void (*_omap2_sram_ddr_init)(u32 *slow_dll_ctrl, u32 fast_dll_ctrl, |
| 230 | u32 base_cs, u32 force_unlock); |
| 231 | |
| 232 | void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl, |
| 233 | u32 base_cs, u32 force_unlock) |
| 234 | { |
| 235 | if (!_omap2_sram_ddr_init) |
| 236 | omap_sram_error(); |
| 237 | |
| 238 | return _omap2_sram_ddr_init(slow_dll_ctrl, fast_dll_ctrl, |
| 239 | base_cs, force_unlock); |
| 240 | } |
| 241 | |
| 242 | static void (*_omap2_sram_reprogram_sdrc)(u32 perf_level, u32 dll_val, |
| 243 | u32 mem_type); |
| 244 | |
| 245 | void omap2_sram_reprogram_sdrc(u32 perf_level, u32 dll_val, u32 mem_type) |
| 246 | { |
| 247 | if (!_omap2_sram_reprogram_sdrc) |
| 248 | omap_sram_error(); |
| 249 | |
| 250 | return _omap2_sram_reprogram_sdrc(perf_level, dll_val, mem_type); |
| 251 | } |
| 252 | |
| 253 | static u32 (*_omap2_set_prcm)(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass); |
| 254 | |
| 255 | u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass) |
| 256 | { |
| 257 | if (!_omap2_set_prcm) |
| 258 | omap_sram_error(); |
| 259 | |
| 260 | return _omap2_set_prcm(dpll_ctrl_val, sdrc_rfr_val, bypass); |
| 261 | } |
| 262 | |
| 263 | int __init omap2_sram_init(void) |
| 264 | { |
| 265 | _omap2_sram_ddr_init = omap_sram_push(sram_ddr_init, sram_ddr_init_sz); |
| 266 | |
| 267 | _omap2_sram_reprogram_sdrc = omap_sram_push(sram_reprogram_sdrc, |
| 268 | sram_reprogram_sdrc_sz); |
| 269 | _omap2_set_prcm = omap_sram_push(sram_set_prcm, sram_set_prcm_sz); |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | #else |
| 274 | #define omap2_sram_init() do {} while (0) |
| 275 | #endif |
| 276 | |
| 277 | int __init omap_sram_init(void) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 278 | { |
| 279 | omap_detect_sram(); |
| 280 | omap_map_sram(); |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 281 | |
| 282 | if (!cpu_is_omap24xx()) |
| 283 | omap1_sram_init(); |
| 284 | else |
| 285 | omap2_sram_init(); |
| 286 | |
| 287 | return 0; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 288 | } |