arch/arm/mach-spear/spear6xx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arch/arm/mach-spear6xx/spear6xx.c
   4  *
   5  * SPEAr6XX machines common source file
   6  *
   7  * Copyright (C) 2009 ST Microelectronics
   8  * Rajeev Kumar<rajeev-dlh.kumar@st.com>
   9  *
  10  * Copyright 2012 Stefan Roese <sr@denx.de>
  11  */
  12
  13 #include <linux/amba/pl08x.h>
  14 #include <linux/clk.h>
  15 #include <linux/clk/spear.h>
  16 #include <linux/err.h>
  17 #include <linux/of.h>
  18 #include <linux/of_address.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/amba/pl080.h>
  21 #include <asm/mach/arch.h>
  22 #include <asm/mach/time.h>
  23 #include <asm/mach/map.h>
  24 #include "pl080.h"
  25 #include "generic.h"
  26 #include "spear.h"
  27 #include "misc_regs.h"
  28
  29 /* dmac device registration */
  30 static struct pl08x_channel_data spear600_dma_info[] = {
  31         {
  32                 .bus_id = "ssp1_rx",
  33                 .min_signal = 0,
  34                 .max_signal = 0,
  35                 .muxval = 0,
  36                 .periph_buses = PL08X_AHB1,
  37         }, {
  38                 .bus_id = "ssp1_tx",
  39                 .min_signal = 1,
  40                 .max_signal = 1,
  41                 .muxval = 0,
  42                 .periph_buses = PL08X_AHB1,
  43         }, {
  44                 .bus_id = "uart0_rx",
  45                 .min_signal = 2,
  46                 .max_signal = 2,
  47                 .muxval = 0,
  48                 .periph_buses = PL08X_AHB1,
  49         }, {
  50                 .bus_id = "uart0_tx",
  51                 .min_signal = 3,
  52                 .max_signal = 3,
  53                 .muxval = 0,
  54                 .periph_buses = PL08X_AHB1,
  55         }, {
  56                 .bus_id = "uart1_rx",
  57                 .min_signal = 4,
  58                 .max_signal = 4,
  59                 .muxval = 0,
  60                 .periph_buses = PL08X_AHB1,
  61         }, {
  62                 .bus_id = "uart1_tx",
  63                 .min_signal = 5,
  64                 .max_signal = 5,
  65                 .muxval = 0,
  66                 .periph_buses = PL08X_AHB1,
  67         }, {
  68                 .bus_id = "ssp2_rx",
  69                 .min_signal = 6,
  70                 .max_signal = 6,
  71                 .muxval = 0,
  72                 .periph_buses = PL08X_AHB2,
  73         }, {
  74                 .bus_id = "ssp2_tx",
  75                 .min_signal = 7,
  76                 .max_signal = 7,
  77                 .muxval = 0,
  78                 .periph_buses = PL08X_AHB2,
  79         }, {
  80                 .bus_id = "ssp0_rx",
  81                 .min_signal = 8,
  82                 .max_signal = 8,
  83                 .muxval = 0,
  84                 .periph_buses = PL08X_AHB1,
  85         }, {
  86                 .bus_id = "ssp0_tx",
  87                 .min_signal = 9,
  88                 .max_signal = 9,
  89                 .muxval = 0,
  90                 .periph_buses = PL08X_AHB1,
  91         }, {
  92                 .bus_id = "i2c_rx",
  93                 .min_signal = 10,
  94                 .max_signal = 10,
  95                 .muxval = 0,
  96                 .periph_buses = PL08X_AHB1,
  97         }, {
  98                 .bus_id = "i2c_tx",
  99                 .min_signal = 11,
 100                 .max_signal = 11,
 101                 .muxval = 0,
 102                 .periph_buses = PL08X_AHB1,
 103         }, {
 104                 .bus_id = "irda",
 105                 .min_signal = 12,
 106                 .max_signal = 12,
 107                 .muxval = 0,
 108                 .periph_buses = PL08X_AHB1,
 109         }, {
 110                 .bus_id = "adc",
 111                 .min_signal = 13,
 112                 .max_signal = 13,
 113                 .muxval = 0,
 114                 .periph_buses = PL08X_AHB2,
 115         }, {
 116                 .bus_id = "to_jpeg",
 117                 .min_signal = 14,
 118                 .max_signal = 14,
 119                 .muxval = 0,
 120                 .periph_buses = PL08X_AHB1,
 121         }, {
 122                 .bus_id = "from_jpeg",
 123                 .min_signal = 15,
 124                 .max_signal = 15,
 125                 .muxval = 0,
 126                 .periph_buses = PL08X_AHB1,
 127         }, {
 128                 .bus_id = "ras0_rx",
 129                 .min_signal = 0,
 130                 .max_signal = 0,
 131                 .muxval = 1,
 132                 .periph_buses = PL08X_AHB1,
 133         }, {
 134                 .bus_id = "ras0_tx",
 135                 .min_signal = 1,
 136                 .max_signal = 1,
 137                 .muxval = 1,
 138                 .periph_buses = PL08X_AHB1,
 139         }, {
 140                 .bus_id = "ras1_rx",
 141                 .min_signal = 2,
 142                 .max_signal = 2,
 143                 .muxval = 1,
 144                 .periph_buses = PL08X_AHB1,
 145         }, {
 146                 .bus_id = "ras1_tx",
 147                 .min_signal = 3,
 148                 .max_signal = 3,
 149                 .muxval = 1,
 150                 .periph_buses = PL08X_AHB1,
 151         }, {
 152                 .bus_id = "ras2_rx",
 153                 .min_signal = 4,
 154                 .max_signal = 4,
 155                 .muxval = 1,
 156                 .periph_buses = PL08X_AHB1,
 157         }, {
 158                 .bus_id = "ras2_tx",
 159                 .min_signal = 5,
 160                 .max_signal = 5,
 161                 .muxval = 1,
 162                 .periph_buses = PL08X_AHB1,
 163         }, {
 164                 .bus_id = "ras3_rx",
 165                 .min_signal = 6,
 166                 .max_signal = 6,
 167                 .muxval = 1,
 168                 .periph_buses = PL08X_AHB1,
 169         }, {
 170                 .bus_id = "ras3_tx",
 171                 .min_signal = 7,
 172                 .max_signal = 7,
 173                 .muxval = 1,
 174                 .periph_buses = PL08X_AHB1,
 175         }, {
 176                 .bus_id = "ras4_rx",
 177                 .min_signal = 8,
 178                 .max_signal = 8,
 179                 .muxval = 1,
 180                 .periph_buses = PL08X_AHB1,
 181         }, {
 182                 .bus_id = "ras4_tx",
 183                 .min_signal = 9,
 184                 .max_signal = 9,
 185                 .muxval = 1,
 186                 .periph_buses = PL08X_AHB1,
 187         }, {
 188                 .bus_id = "ras5_rx",
 189                 .min_signal = 10,
 190                 .max_signal = 10,
 191                 .muxval = 1,
 192                 .periph_buses = PL08X_AHB1,
 193         }, {
 194                 .bus_id = "ras5_tx",
 195                 .min_signal = 11,
 196                 .max_signal = 11,
 197                 .muxval = 1,
 198                 .periph_buses = PL08X_AHB1,
 199         }, {
 200                 .bus_id = "ras6_rx",
 201                 .min_signal = 12,
 202                 .max_signal = 12,
 203                 .muxval = 1,
 204                 .periph_buses = PL08X_AHB1,
 205         }, {
 206                 .bus_id = "ras6_tx",
 207                 .min_signal = 13,
 208                 .max_signal = 13,
 209                 .muxval = 1,
 210                 .periph_buses = PL08X_AHB1,
 211         }, {
 212                 .bus_id = "ras7_rx",
 213                 .min_signal = 14,
 214                 .max_signal = 14,
 215                 .muxval = 1,
 216                 .periph_buses = PL08X_AHB1,
 217         }, {
 218                 .bus_id = "ras7_tx",
 219                 .min_signal = 15,
 220                 .max_signal = 15,
 221                 .muxval = 1,
 222                 .periph_buses = PL08X_AHB1,
 223         }, {
 224                 .bus_id = "ext0_rx",
 225                 .min_signal = 0,
 226                 .max_signal = 0,
 227                 .muxval = 2,
 228                 .periph_buses = PL08X_AHB2,
 229         }, {
 230                 .bus_id = "ext0_tx",
 231                 .min_signal = 1,
 232                 .max_signal = 1,
 233                 .muxval = 2,
 234                 .periph_buses = PL08X_AHB2,
 235         }, {
 236                 .bus_id = "ext1_rx",
 237                 .min_signal = 2,
 238                 .max_signal = 2,
 239                 .muxval = 2,
 240                 .periph_buses = PL08X_AHB2,
 241         }, {
 242                 .bus_id = "ext1_tx",
 243                 .min_signal = 3,
 244                 .max_signal = 3,
 245                 .muxval = 2,
 246                 .periph_buses = PL08X_AHB2,
 247         }, {
 248                 .bus_id = "ext2_rx",
 249                 .min_signal = 4,
 250                 .max_signal = 4,
 251                 .muxval = 2,
 252                 .periph_buses = PL08X_AHB2,
 253         }, {
 254                 .bus_id = "ext2_tx",
 255                 .min_signal = 5,
 256                 .max_signal = 5,
 257                 .muxval = 2,
 258                 .periph_buses = PL08X_AHB2,
 259         }, {
 260                 .bus_id = "ext3_rx",
 261                 .min_signal = 6,
 262                 .max_signal = 6,
 263                 .muxval = 2,
 264                 .periph_buses = PL08X_AHB2,
 265         }, {
 266                 .bus_id = "ext3_tx",
 267                 .min_signal = 7,
 268                 .max_signal = 7,
 269                 .muxval = 2,
 270                 .periph_buses = PL08X_AHB2,
 271         }, {
 272                 .bus_id = "ext4_rx",
 273                 .min_signal = 8,
 274                 .max_signal = 8,
 275                 .muxval = 2,
 276                 .periph_buses = PL08X_AHB2,
 277         }, {
 278                 .bus_id = "ext4_tx",
 279                 .min_signal = 9,
 280                 .max_signal = 9,
 281                 .muxval = 2,
 282                 .periph_buses = PL08X_AHB2,
 283         }, {
 284                 .bus_id = "ext5_rx",
 285                 .min_signal = 10,
 286                 .max_signal = 10,
 287                 .muxval = 2,
 288                 .periph_buses = PL08X_AHB2,
 289         }, {
 290                 .bus_id = "ext5_tx",
 291                 .min_signal = 11,
 292                 .max_signal = 11,
 293                 .muxval = 2,
 294                 .periph_buses = PL08X_AHB2,
 295         }, {
 296                 .bus_id = "ext6_rx",
 297                 .min_signal = 12,
 298                 .max_signal = 12,
 299                 .muxval = 2,
 300                 .periph_buses = PL08X_AHB2,
 301         }, {
 302                 .bus_id = "ext6_tx",
 303                 .min_signal = 13,
 304                 .max_signal = 13,
 305                 .muxval = 2,
 306                 .periph_buses = PL08X_AHB2,
 307         }, {
 308                 .bus_id = "ext7_rx",
 309                 .min_signal = 14,
 310                 .max_signal = 14,
 311                 .muxval = 2,
 312                 .periph_buses = PL08X_AHB2,
 313         }, {
 314                 .bus_id = "ext7_tx",
 315                 .min_signal = 15,
 316                 .max_signal = 15,
 317                 .muxval = 2,
 318                 .periph_buses = PL08X_AHB2,
 319         },
 320 };
 321
 322 static struct pl08x_platform_data spear6xx_pl080_plat_data = {
 323         .memcpy_burst_size = PL08X_BURST_SZ_16,
 324         .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
 325         .memcpy_prot_buff = true,
 326         .memcpy_prot_cache = true,
 327         .lli_buses = PL08X_AHB1,
 328         .mem_buses = PL08X_AHB1,
 329         .get_xfer_signal = pl080_get_signal,
 330         .put_xfer_signal = pl080_put_signal,
 331         .slave_channels = spear600_dma_info,
 332         .num_slave_channels = ARRAY_SIZE(spear600_dma_info),
 333 };
 334
 335 /*
 336  * Following will create 16MB static virtual/physical mappings
 337  * PHYSICAL             VIRTUAL
 338  * 0xF0000000           0xF0000000
 339  * 0xF1000000           0xF1000000
 340  * 0xD0000000           0xFD000000
 341  * 0xFC000000           0xFC000000
 342  */
 343 static struct map_desc spear6xx_io_desc[] __initdata = {
 344         {
 345                 .virtual        = (unsigned long)VA_SPEAR6XX_ML_CPU_BASE,
 346                 .pfn            = __phys_to_pfn(SPEAR_ICM3_ML1_2_BASE),
 347                 .length         = 2 * SZ_16M,
 348                 .type           = MT_DEVICE
 349         },      {
 350                 .virtual        = (unsigned long)VA_SPEAR_ICM1_2_BASE,
 351                 .pfn            = __phys_to_pfn(SPEAR_ICM1_2_BASE),
 352                 .length         = SZ_16M,
 353                 .type           = MT_DEVICE
 354         }, {
 355                 .virtual        = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
 356                 .pfn            = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
 357                 .length         = SZ_16M,
 358                 .type           = MT_DEVICE
 359         },
 360 };
 361
 362 /* This will create static memory mapping for selected devices */
 363 static void __init spear6xx_map_io(void)
 364 {
 365         iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
 366 }
 367
 368 static void __init spear6xx_timer_init(void)
 369 {
 370         char pclk_name[] = "pll3_clk";
 371         struct clk *gpt_clk, *pclk;
 372
 373         spear6xx_clk_init(MISC_BASE);
 374
 375         /* get the system timer clock */
 376         gpt_clk = clk_get_sys("gpt0", NULL);
 377         if (IS_ERR(gpt_clk)) {
 378                 pr_err("%s:couldn't get clk for gpt\n", __func__);
 379                 BUG();
 380         }
 381
 382         /* get the suitable parent clock for timer*/
 383         pclk = clk_get(NULL, pclk_name);
 384         if (IS_ERR(pclk)) {
 385                 pr_err("%s:couldn't get %s as parent for gpt\n",
 386                                 __func__, pclk_name);
 387                 BUG();
 388         }
 389
 390         clk_set_parent(gpt_clk, pclk);
 391         clk_put(gpt_clk);
 392         clk_put(pclk);
 393
 394         spear_setup_of_timer();
 395 }
 396
 397 /* Add auxdata to pass platform data */
 398 static struct of_dev_auxdata spear6xx_auxdata_lookup[] __initdata = {
 399         OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL,
 400                         &spear6xx_pl080_plat_data),
 401         {}
 402 };
 403
 404 static void __init spear600_dt_init(void)
 405 {
 406         of_platform_default_populate(NULL, spear6xx_auxdata_lookup, NULL);
 407 }
 408
 409 static const char *spear600_dt_board_compat[] = {
 410         "st,spear600",
 411         NULL
 412 };
 413
 414 DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)")
 415         .map_io         =       spear6xx_map_io,
 416         .init_time      =       spear6xx_timer_init,
 417         .init_machine   =       spear600_dt_init,
 418         .restart        =       spear_restart,
 419         .dt_compat      =       spear600_dt_board_compat,
 420 MACHINE_END