drivers/gpu/drm/radeon/si_smc.c

   1 /*
   2  * Copyright 2011 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Alex Deucher
  23  */
  24
  25 #include <linux/firmware.h>
  26 #include "drmP.h"
  27 #include "radeon.h"
  28 #include "sid.h"
  29 #include "ppsmc.h"
  30 #include "radeon_ucode.h"
  31 #include "sislands_smc.h"
  32
  33 static int si_set_smc_sram_address(struct radeon_device *rdev,
  34                                    u32 smc_address, u32 limit)
  35 {
  36         if (smc_address & 3)
  37                 return -EINVAL;
  38         if ((smc_address + 3) > limit)
  39                 return -EINVAL;
  40
  41         WREG32(SMC_IND_INDEX_0, smc_address);
  42         WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
  43
  44         return 0;
  45 }
  46
  47 int si_copy_bytes_to_smc(struct radeon_device *rdev,
  48                          u32 smc_start_address,
  49                          const u8 *src, u32 byte_count, u32 limit)
  50 {
  51         unsigned long flags;
  52         int ret = 0;
  53         u32 data, original_data, addr, extra_shift;
  54
  55         if (smc_start_address & 3)
  56                 return -EINVAL;
  57         if ((smc_start_address + byte_count) > limit)
  58                 return -EINVAL;
  59
  60         addr = smc_start_address;
  61
  62         spin_lock_irqsave(&rdev->smc_idx_lock, flags);
  63         while (byte_count >= 4) {
  64                 /* SMC address space is BE */
  65                 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
  66
  67                 ret = si_set_smc_sram_address(rdev, addr, limit);
  68                 if (ret)
  69                         goto done;
  70
  71                 WREG32(SMC_IND_DATA_0, data);
  72
  73                 src += 4;
  74                 byte_count -= 4;
  75                 addr += 4;
  76         }
  77
  78         /* RMW for the final bytes */
  79         if (byte_count > 0) {
  80                 data = 0;
  81
  82                 ret = si_set_smc_sram_address(rdev, addr, limit);
  83                 if (ret)
  84                         goto done;
  85
  86                 original_data = RREG32(SMC_IND_DATA_0);
  87
  88                 extra_shift = 8 * (4 - byte_count);
  89
  90                 while (byte_count > 0) {
  91                         /* SMC address space is BE */
  92                         data = (data << 8) + *src++;
  93                         byte_count--;
  94                 }
  95
  96                 data <<= extra_shift;
  97
  98                 data |= (original_data & ~((~0UL) << extra_shift));
  99
 100                 ret = si_set_smc_sram_address(rdev, addr, limit);
 101                 if (ret)
 102                         goto done;
 103
 104                 WREG32(SMC_IND_DATA_0, data);
 105         }
 106
 107 done:
 108         spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
 109
 110         return ret;
 111 }
 112
 113 void si_start_smc(struct radeon_device *rdev)
 114 {
 115         u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
 116
 117         tmp &= ~RST_REG;
 118
 119         WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
 120 }
 121
 122 void si_reset_smc(struct radeon_device *rdev)
 123 {
 124         u32 tmp;
 125
 126         RREG32(CB_CGTT_SCLK_CTRL);
 127         RREG32(CB_CGTT_SCLK_CTRL);
 128         RREG32(CB_CGTT_SCLK_CTRL);
 129         RREG32(CB_CGTT_SCLK_CTRL);
 130
 131         tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
 132         tmp |= RST_REG;
 133         WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
 134 }
 135
 136 int si_program_jump_on_start(struct radeon_device *rdev)
 137 {
 138         static u8 data[] = { 0x0E, 0x00, 0x40, 0x40 };
 139
 140         return si_copy_bytes_to_smc(rdev, 0x0, data, 4, sizeof(data)+1);
 141 }
 142
 143 void si_stop_smc_clock(struct radeon_device *rdev)
 144 {
 145         u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 146
 147         tmp |= CK_DISABLE;
 148
 149         WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
 150 }
 151
 152 void si_start_smc_clock(struct radeon_device *rdev)
 153 {
 154         u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 155
 156         tmp &= ~CK_DISABLE;
 157
 158         WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
 159 }
 160
 161 bool si_is_smc_running(struct radeon_device *rdev)
 162 {
 163         u32 rst = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
 164         u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 165
 166         if (!(rst & RST_REG) && !(clk & CK_DISABLE))
 167                 return true;
 168
 169         return false;
 170 }
 171
 172 PPSMC_Result si_send_msg_to_smc(struct radeon_device *rdev, PPSMC_Msg msg)
 173 {
 174         u32 tmp;
 175         int i;
 176
 177         if (!si_is_smc_running(rdev))
 178                 return PPSMC_Result_Failed;
 179
 180         WREG32(SMC_MESSAGE_0, msg);
 181
 182         for (i = 0; i < rdev->usec_timeout; i++) {
 183                 tmp = RREG32(SMC_RESP_0);
 184                 if (tmp != 0)
 185                         break;
 186                 udelay(1);
 187         }
 188         tmp = RREG32(SMC_RESP_0);
 189
 190         return (PPSMC_Result)tmp;
 191 }
 192
 193 PPSMC_Result si_wait_for_smc_inactive(struct radeon_device *rdev)
 194 {
 195         u32 tmp;
 196         int i;
 197
 198         if (!si_is_smc_running(rdev))
 199                 return PPSMC_Result_OK;
 200
 201         for (i = 0; i < rdev->usec_timeout; i++) {
 202                 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 203                 if ((tmp & CKEN) == 0)
 204                         break;
 205                 udelay(1);
 206         }
 207
 208         return PPSMC_Result_OK;
 209 }
 210
 211 int si_load_smc_ucode(struct radeon_device *rdev, u32 limit)
 212 {
 213         unsigned long flags;
 214         u32 ucode_start_address;
 215         u32 ucode_size;
 216         const u8 *src;
 217         u32 data;
 218
 219         if (!rdev->smc_fw)
 220                 return -EINVAL;
 221
 222         switch (rdev->family) {
 223         case CHIP_TAHITI:
 224                 ucode_start_address = TAHITI_SMC_UCODE_START;
 225                 ucode_size = TAHITI_SMC_UCODE_SIZE;
 226                 break;
 227         case CHIP_PITCAIRN:
 228                 ucode_start_address = PITCAIRN_SMC_UCODE_START;
 229                 ucode_size = PITCAIRN_SMC_UCODE_SIZE;
 230                 break;
 231         case CHIP_VERDE:
 232                 ucode_start_address = VERDE_SMC_UCODE_START;
 233                 ucode_size = VERDE_SMC_UCODE_SIZE;
 234                 break;
 235         case CHIP_OLAND:
 236                 ucode_start_address = OLAND_SMC_UCODE_START;
 237                 ucode_size = OLAND_SMC_UCODE_SIZE;
 238                 break;
 239         case CHIP_HAINAN:
 240                 ucode_start_address = HAINAN_SMC_UCODE_START;
 241                 ucode_size = HAINAN_SMC_UCODE_SIZE;
 242                 break;
 243         default:
 244                 DRM_ERROR("unknown asic in smc ucode loader\n");
 245                 BUG();
 246         }
 247
 248         if (ucode_size & 3)
 249                 return -EINVAL;
 250
 251         src = (const u8 *)rdev->smc_fw->data;
 252         spin_lock_irqsave(&rdev->smc_idx_lock, flags);
 253         WREG32(SMC_IND_INDEX_0, ucode_start_address);
 254         WREG32_P(SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, ~AUTO_INCREMENT_IND_0);
 255         while (ucode_size >= 4) {
 256                 /* SMC address space is BE */
 257                 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
 258
 259                 WREG32(SMC_IND_DATA_0, data);
 260
 261                 src += 4;
 262                 ucode_size -= 4;
 263         }
 264         WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
 265         spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
 266
 267         return 0;
 268 }
 269
 270 int si_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,
 271                            u32 *value, u32 limit)
 272 {
 273         unsigned long flags;
 274         int ret;
 275
 276         spin_lock_irqsave(&rdev->smc_idx_lock, flags);
 277         ret = si_set_smc_sram_address(rdev, smc_address, limit);
 278         if (ret == 0)
 279                 *value = RREG32(SMC_IND_DATA_0);
 280         spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
 281
 282         return ret;
 283 }
 284
 285 int si_write_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,
 286                             u32 value, u32 limit)
 287 {
 288         unsigned long flags;
 289         int ret;
 290
 291         spin_lock_irqsave(&rdev->smc_idx_lock, flags);
 292         ret = si_set_smc_sram_address(rdev, smc_address, limit);
 293         if (ret == 0)
 294                 WREG32(SMC_IND_DATA_0, value);
 295         spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
 296
 297         return ret;
 298 }