1 /* 2 * arch/arm/mach-spear6xx/spear6xx.c 3 * 4 * SPEAr6XX machines common source file 5 * 6 * Copyright (C) 2009 ST Microelectronics 7 * Rajeev Kumar<rajeev-dlh.kumar@st.com> 8 * 9 * Copyright 2012 Stefan Roese <sr@denx.de> 10 * 11 * This file is licensed under the terms of the GNU General Public 12 * License version 2. This program is licensed "as is" without any 13 * warranty of any kind, whether express or implied. 14 */ 15 16 #include <linux/amba/pl08x.h> 17 #include <linux/clk.h> 18 #include <linux/err.h> 19 #include <linux/of.h> 20 #include <linux/of_address.h> 21 #include <linux/of_platform.h> 22 #include <linux/amba/pl080.h> 23 #include <asm/mach/arch.h> 24 #include <asm/mach/time.h> 25 #include <asm/mach/map.h> 26 #include "pl080.h" 27 #include "generic.h" 28 #include "spear.h" 29 #include "misc_regs.h" 30 31 /* dmac device registration */ 32 static struct pl08x_channel_data spear600_dma_info[] = { 33 { 34 .bus_id = "ssp1_rx", 35 .min_signal = 0, 36 .max_signal = 0, 37 .muxval = 0, 38 .periph_buses = PL08X_AHB1, 39 }, { 40 .bus_id = "ssp1_tx", 41 .min_signal = 1, 42 .max_signal = 1, 43 .muxval = 0, 44 .periph_buses = PL08X_AHB1, 45 }, { 46 .bus_id = "uart0_rx", 47 .min_signal = 2, 48 .max_signal = 2, 49 .muxval = 0, 50 .periph_buses = PL08X_AHB1, 51 }, { 52 .bus_id = "uart0_tx", 53 .min_signal = 3, 54 .max_signal = 3, 55 .muxval = 0, 56 .periph_buses = PL08X_AHB1, 57 }, { 58 .bus_id = "uart1_rx", 59 .min_signal = 4, 60 .max_signal = 4, 61 .muxval = 0, 62 .periph_buses = PL08X_AHB1, 63 }, { 64 .bus_id = "uart1_tx", 65 .min_signal = 5, 66 .max_signal = 5, 67 .muxval = 0, 68 .periph_buses = PL08X_AHB1, 69 }, { 70 .bus_id = "ssp2_rx", 71 .min_signal = 6, 72 .max_signal = 6, 73 .muxval = 0, 74 .periph_buses = PL08X_AHB2, 75 }, { 76 .bus_id = "ssp2_tx", 77 .min_signal = 7, 78 .max_signal = 7, 79 .muxval = 0, 80 .periph_buses = PL08X_AHB2, 81 }, { 82 .bus_id = "ssp0_rx", 83 .min_signal = 8, 84 .max_signal = 8, 85 .muxval = 0, 86 .periph_buses = PL08X_AHB1, 87 }, { 88 .bus_id = "ssp0_tx", 89 .min_signal = 9, 90 .max_signal = 9, 91 .muxval = 0, 92 .periph_buses = PL08X_AHB1, 93 }, { 94 .bus_id = "i2c_rx", 95 .min_signal = 10, 96 .max_signal = 10, 97 .muxval = 0, 98 .periph_buses = PL08X_AHB1, 99 }, { 100 .bus_id = "i2c_tx", 101 .min_signal = 11, 102 .max_signal = 11, 103 .muxval = 0, 104 .periph_buses = PL08X_AHB1, 105 }, { 106 .bus_id = "irda", 107 .min_signal = 12, 108 .max_signal = 12, 109 .muxval = 0, 110 .periph_buses = PL08X_AHB1, 111 }, { 112 .bus_id = "adc", 113 .min_signal = 13, 114 .max_signal = 13, 115 .muxval = 0, 116 .periph_buses = PL08X_AHB2, 117 }, { 118 .bus_id = "to_jpeg", 119 .min_signal = 14, 120 .max_signal = 14, 121 .muxval = 0, 122 .periph_buses = PL08X_AHB1, 123 }, { 124 .bus_id = "from_jpeg", 125 .min_signal = 15, 126 .max_signal = 15, 127 .muxval = 0, 128 .periph_buses = PL08X_AHB1, 129 }, { 130 .bus_id = "ras0_rx", 131 .min_signal = 0, 132 .max_signal = 0, 133 .muxval = 1, 134 .periph_buses = PL08X_AHB1, 135 }, { 136 .bus_id = "ras0_tx", 137 .min_signal = 1, 138 .max_signal = 1, 139 .muxval = 1, 140 .periph_buses = PL08X_AHB1, 141 }, { 142 .bus_id = "ras1_rx", 143 .min_signal = 2, 144 .max_signal = 2, 145 .muxval = 1, 146 .periph_buses = PL08X_AHB1, 147 }, { 148 .bus_id = "ras1_tx", 149 .min_signal = 3, 150 .max_signal = 3, 151 .muxval = 1, 152 .periph_buses = PL08X_AHB1, 153 }, { 154 .bus_id = "ras2_rx", 155 .min_signal = 4, 156 .max_signal = 4, 157 .muxval = 1, 158 .periph_buses = PL08X_AHB1, 159 }, { 160 .bus_id = "ras2_tx", 161 .min_signal = 5, 162 .max_signal = 5, 163 .muxval = 1, 164 .periph_buses = PL08X_AHB1, 165 }, { 166 .bus_id = "ras3_rx", 167 .min_signal = 6, 168 .max_signal = 6, 169 .muxval = 1, 170 .periph_buses = PL08X_AHB1, 171 }, { 172 .bus_id = "ras3_tx", 173 .min_signal = 7, 174 .max_signal = 7, 175 .muxval = 1, 176 .periph_buses = PL08X_AHB1, 177 }, { 178 .bus_id = "ras4_rx", 179 .min_signal = 8, 180 .max_signal = 8, 181 .muxval = 1, 182 .periph_buses = PL08X_AHB1, 183 }, { 184 .bus_id = "ras4_tx", 185 .min_signal = 9, 186 .max_signal = 9, 187 .muxval = 1, 188 .periph_buses = PL08X_AHB1, 189 }, { 190 .bus_id = "ras5_rx", 191 .min_signal = 10, 192 .max_signal = 10, 193 .muxval = 1, 194 .periph_buses = PL08X_AHB1, 195 }, { 196 .bus_id = "ras5_tx", 197 .min_signal = 11, 198 .max_signal = 11, 199 .muxval = 1, 200 .periph_buses = PL08X_AHB1, 201 }, { 202 .bus_id = "ras6_rx", 203 .min_signal = 12, 204 .max_signal = 12, 205 .muxval = 1, 206 .periph_buses = PL08X_AHB1, 207 }, { 208 .bus_id = "ras6_tx", 209 .min_signal = 13, 210 .max_signal = 13, 211 .muxval = 1, 212 .periph_buses = PL08X_AHB1, 213 }, { 214 .bus_id = "ras7_rx", 215 .min_signal = 14, 216 .max_signal = 14, 217 .muxval = 1, 218 .periph_buses = PL08X_AHB1, 219 }, { 220 .bus_id = "ras7_tx", 221 .min_signal = 15, 222 .max_signal = 15, 223 .muxval = 1, 224 .periph_buses = PL08X_AHB1, 225 }, { 226 .bus_id = "ext0_rx", 227 .min_signal = 0, 228 .max_signal = 0, 229 .muxval = 2, 230 .periph_buses = PL08X_AHB2, 231 }, { 232 .bus_id = "ext0_tx", 233 .min_signal = 1, 234 .max_signal = 1, 235 .muxval = 2, 236 .periph_buses = PL08X_AHB2, 237 }, { 238 .bus_id = "ext1_rx", 239 .min_signal = 2, 240 .max_signal = 2, 241 .muxval = 2, 242 .periph_buses = PL08X_AHB2, 243 }, { 244 .bus_id = "ext1_tx", 245 .min_signal = 3, 246 .max_signal = 3, 247 .muxval = 2, 248 .periph_buses = PL08X_AHB2, 249 }, { 250 .bus_id = "ext2_rx", 251 .min_signal = 4, 252 .max_signal = 4, 253 .muxval = 2, 254 .periph_buses = PL08X_AHB2, 255 }, { 256 .bus_id = "ext2_tx", 257 .min_signal = 5, 258 .max_signal = 5, 259 .muxval = 2, 260 .periph_buses = PL08X_AHB2, 261 }, { 262 .bus_id = "ext3_rx", 263 .min_signal = 6, 264 .max_signal = 6, 265 .muxval = 2, 266 .periph_buses = PL08X_AHB2, 267 }, { 268 .bus_id = "ext3_tx", 269 .min_signal = 7, 270 .max_signal = 7, 271 .muxval = 2, 272 .periph_buses = PL08X_AHB2, 273 }, { 274 .bus_id = "ext4_rx", 275 .min_signal = 8, 276 .max_signal = 8, 277 .muxval = 2, 278 .periph_buses = PL08X_AHB2, 279 }, { 280 .bus_id = "ext4_tx", 281 .min_signal = 9, 282 .max_signal = 9, 283 .muxval = 2, 284 .periph_buses = PL08X_AHB2, 285 }, { 286 .bus_id = "ext5_rx", 287 .min_signal = 10, 288 .max_signal = 10, 289 .muxval = 2, 290 .periph_buses = PL08X_AHB2, 291 }, { 292 .bus_id = "ext5_tx", 293 .min_signal = 11, 294 .max_signal = 11, 295 .muxval = 2, 296 .periph_buses = PL08X_AHB2, 297 }, { 298 .bus_id = "ext6_rx", 299 .min_signal = 12, 300 .max_signal = 12, 301 .muxval = 2, 302 .periph_buses = PL08X_AHB2, 303 }, { 304 .bus_id = "ext6_tx", 305 .min_signal = 13, 306 .max_signal = 13, 307 .muxval = 2, 308 .periph_buses = PL08X_AHB2, 309 }, { 310 .bus_id = "ext7_rx", 311 .min_signal = 14, 312 .max_signal = 14, 313 .muxval = 2, 314 .periph_buses = PL08X_AHB2, 315 }, { 316 .bus_id = "ext7_tx", 317 .min_signal = 15, 318 .max_signal = 15, 319 .muxval = 2, 320 .periph_buses = PL08X_AHB2, 321 }, 322 }; 323 324 static struct pl08x_platform_data spear6xx_pl080_plat_data = { 325 .memcpy_burst_size = PL08X_BURST_SZ_16, 326 .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS, 327 .memcpy_prot_buff = true, 328 .memcpy_prot_cache = true, 329 .lli_buses = PL08X_AHB1, 330 .mem_buses = PL08X_AHB1, 331 .get_xfer_signal = pl080_get_signal, 332 .put_xfer_signal = pl080_put_signal, 333 .slave_channels = spear600_dma_info, 334 .num_slave_channels = ARRAY_SIZE(spear600_dma_info), 335 }; 336 337 /* 338 * Following will create 16MB static virtual/physical mappings 339 * PHYSICAL VIRTUAL 340 * 0xF0000000 0xF0000000 341 * 0xF1000000 0xF1000000 342 * 0xD0000000 0xFD000000 343 * 0xFC000000 0xFC000000 344 */ 345 struct map_desc spear6xx_io_desc[] __initdata = { 346 { 347 .virtual = (unsigned long)VA_SPEAR6XX_ML_CPU_BASE, 348 .pfn = __phys_to_pfn(SPEAR_ICM3_ML1_2_BASE), 349 .length = 2 * SZ_16M, 350 .type = MT_DEVICE 351 }, { 352 .virtual = (unsigned long)VA_SPEAR_ICM1_2_BASE, 353 .pfn = __phys_to_pfn(SPEAR_ICM1_2_BASE), 354 .length = SZ_16M, 355 .type = MT_DEVICE 356 }, { 357 .virtual = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE, 358 .pfn = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE), 359 .length = SZ_16M, 360 .type = MT_DEVICE 361 }, 362 }; 363 364 /* This will create static memory mapping for selected devices */ 365 void __init spear6xx_map_io(void) 366 { 367 iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc)); 368 } 369 370 void __init spear6xx_timer_init(void) 371 { 372 char pclk_name[] = "pll3_clk"; 373 struct clk *gpt_clk, *pclk; 374 375 spear6xx_clk_init(MISC_BASE); 376 377 /* get the system timer clock */ 378 gpt_clk = clk_get_sys("gpt0", NULL); 379 if (IS_ERR(gpt_clk)) { 380 pr_err("%s:couldn't get clk for gpt\n", __func__); 381 BUG(); 382 } 383 384 /* get the suitable parent clock for timer*/ 385 pclk = clk_get(NULL, pclk_name); 386 if (IS_ERR(pclk)) { 387 pr_err("%s:couldn't get %s as parent for gpt\n", 388 __func__, pclk_name); 389 BUG(); 390 } 391 392 clk_set_parent(gpt_clk, pclk); 393 clk_put(gpt_clk); 394 clk_put(pclk); 395 396 spear_setup_of_timer(); 397 } 398 399 /* Add auxdata to pass platform data */ 400 struct of_dev_auxdata spear6xx_auxdata_lookup[] __initdata = { 401 OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL, 402 &spear6xx_pl080_plat_data), 403 {} 404 }; 405 406 static void __init spear600_dt_init(void) 407 { 408 of_platform_default_populate(NULL, spear6xx_auxdata_lookup, NULL); 409 } 410 411 static const char *spear600_dt_board_compat[] = { 412 "st,spear600", 413 NULL 414 }; 415 416 DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)") 417 .map_io = spear6xx_map_io, 418 .init_time = spear6xx_timer_init, 419 .init_machine = spear600_dt_init, 420 .restart = spear_restart, 421 .dt_compat = spear600_dt_board_compat, 422 MACHINE_END 423