arch/arm/mach-spear/spear6xx.c

   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 <mach/spear.h>
  29 #include <mach/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