drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c

   1 /*
   2  * linux/drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c
   3  *
   4  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com/
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/err.h>
  15 #include <linux/firmware.h>
  16 #include <linux/jiffies.h>
  17 #include <linux/sched.h>
  18 #include "regs-mfc.h"
  19 #include "s5p_mfc_cmd.h"
  20 #include "s5p_mfc_common.h"
  21 #include "s5p_mfc_debug.h"
  22 #include "s5p_mfc_intr.h"
  23 #include "s5p_mfc_pm.h"
  24
  25 static void *s5p_mfc_bitproc_buf;
  26 static size_t s5p_mfc_bitproc_phys;
  27 static unsigned char *s5p_mfc_bitproc_virt;
  28
  29 /* Allocate and load firmware */
  30 int s5p_mfc_alloc_and_load_firmware(struct s5p_mfc_dev *dev)
  31 {
  32         struct firmware *fw_blob;
  33         size_t bank2_base_phys;
  34         void *b_base;
  35         int err;
  36
  37         /* Firmare has to be present as a separate file or compiled
  38          * into kernel. */
  39         mfc_debug_enter();
  40         err = request_firmware((const struct firmware **)&fw_blob,
  41                                      "s5p-mfc.fw", dev->v4l2_dev.dev);
  42         if (err != 0) {
  43                 mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n");
  44                 return -EINVAL;
  45         }
  46         dev->fw_size = ALIGN(fw_blob->size, FIRMWARE_ALIGN);
  47         if (s5p_mfc_bitproc_buf) {
  48                 mfc_err("Attempting to allocate firmware when it seems that it is already loaded\n");
  49                 release_firmware(fw_blob);
  50                 return -ENOMEM;
  51         }
  52         s5p_mfc_bitproc_buf = vb2_dma_contig_memops.alloc(
  53                 dev->alloc_ctx[MFC_BANK1_ALLOC_CTX], dev->fw_size);
  54         if (IS_ERR(s5p_mfc_bitproc_buf)) {
  55                 s5p_mfc_bitproc_buf = 0;
  56                 mfc_err("Allocating bitprocessor buffer failed\n");
  57                 release_firmware(fw_blob);
  58                 return -ENOMEM;
  59         }
  60         s5p_mfc_bitproc_phys = s5p_mfc_mem_cookie(
  61                 dev->alloc_ctx[MFC_BANK1_ALLOC_CTX], s5p_mfc_bitproc_buf);
  62         if (s5p_mfc_bitproc_phys & ((1 << MFC_BASE_ALIGN_ORDER) - 1)) {
  63                 mfc_err("The base memory for bank 1 is not aligned to 128KB\n");
  64                 vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf);
  65                 s5p_mfc_bitproc_phys = 0;
  66                 s5p_mfc_bitproc_buf = 0;
  67                 release_firmware(fw_blob);
  68                 return -EIO;
  69         }
  70         s5p_mfc_bitproc_virt = vb2_dma_contig_memops.vaddr(s5p_mfc_bitproc_buf);
  71         if (!s5p_mfc_bitproc_virt) {
  72                 mfc_err("Bitprocessor memory remap failed\n");
  73                 vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf);
  74                 s5p_mfc_bitproc_phys = 0;
  75                 s5p_mfc_bitproc_buf = 0;
  76                 release_firmware(fw_blob);
  77                 return -EIO;
  78         }
  79         dev->bank1 = s5p_mfc_bitproc_phys;
  80         b_base = vb2_dma_contig_memops.alloc(
  81                 dev->alloc_ctx[MFC_BANK2_ALLOC_CTX], 1 << MFC_BANK2_ALIGN_ORDER);
  82         if (IS_ERR(b_base)) {
  83                 vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf);
  84                 s5p_mfc_bitproc_phys = 0;
  85                 s5p_mfc_bitproc_buf = 0;
  86                 mfc_err("Allocating bank2 base failed\n");
  87         release_firmware(fw_blob);
  88                 return -ENOMEM;
  89         }
  90         bank2_base_phys = s5p_mfc_mem_cookie(
  91                 dev->alloc_ctx[MFC_BANK2_ALLOC_CTX], b_base);
  92         vb2_dma_contig_memops.put(b_base);
  93         if (bank2_base_phys & ((1 << MFC_BASE_ALIGN_ORDER) - 1)) {
  94                 mfc_err("The base memory for bank 2 is not aligned to 128KB\n");
  95                 vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf);
  96                 s5p_mfc_bitproc_phys = 0;
  97                 s5p_mfc_bitproc_buf = 0;
  98                 release_firmware(fw_blob);
  99                 return -EIO;
 100         }
 101         dev->bank2 = bank2_base_phys;
 102         memcpy(s5p_mfc_bitproc_virt, fw_blob->data, fw_blob->size);
 103         wmb();
 104         release_firmware(fw_blob);
 105         mfc_debug_leave();
 106         return 0;
 107 }
 108
 109 /* Reload firmware to MFC */
 110 int s5p_mfc_reload_firmware(struct s5p_mfc_dev *dev)
 111 {
 112         struct firmware *fw_blob;
 113         int err;
 114
 115         /* Firmare has to be present as a separate file or compiled
 116          * into kernel. */
 117         mfc_debug_enter();
 118         err = request_firmware((const struct firmware **)&fw_blob,
 119                                      "s5p-mfc.fw", dev->v4l2_dev.dev);
 120         if (err != 0) {
 121                 mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n");
 122                 return -EINVAL;
 123         }
 124         if (fw_blob->size > dev->fw_size) {
 125                 mfc_err("MFC firmware is too big to be loaded\n");
 126                 release_firmware(fw_blob);
 127                 return -ENOMEM;
 128         }
 129         if (s5p_mfc_bitproc_buf == 0 || s5p_mfc_bitproc_phys == 0) {
 130                 mfc_err("MFC firmware is not allocated or was not mapped correctly\n");
 131                 release_firmware(fw_blob);
 132                 return -EINVAL;
 133         }
 134         memcpy(s5p_mfc_bitproc_virt, fw_blob->data, fw_blob->size);
 135         wmb();
 136         release_firmware(fw_blob);
 137         mfc_debug_leave();
 138         return 0;
 139 }
 140
 141 /* Release firmware memory */
 142 int s5p_mfc_release_firmware(struct s5p_mfc_dev *dev)
 143 {
 144         /* Before calling this function one has to make sure
 145          * that MFC is no longer processing */
 146         if (!s5p_mfc_bitproc_buf)
 147                 return -EINVAL;
 148         vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf);
 149         s5p_mfc_bitproc_virt =  0;
 150         s5p_mfc_bitproc_phys = 0;
 151         s5p_mfc_bitproc_buf = 0;
 152         return 0;
 153 }
 154
 155 /* Reset the device */
 156 int s5p_mfc_reset(struct s5p_mfc_dev *dev)
 157 {
 158         unsigned int mc_status;
 159         unsigned long timeout;
 160
 161         mfc_debug_enter();
 162         /* Stop procedure */
 163         /*  reset RISC */
 164         mfc_write(dev, 0x3f6, S5P_FIMV_SW_RESET);
 165         /*  All reset except for MC */
 166         mfc_write(dev, 0x3e2, S5P_FIMV_SW_RESET);
 167         mdelay(10);
 168
 169         timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT);
 170         /* Check MC status */
 171         do {
 172                 if (time_after(jiffies, timeout)) {
 173                         mfc_err("Timeout while resetting MFC\n");
 174                         return -EIO;
 175                 }
 176
 177                 mc_status = mfc_read(dev, S5P_FIMV_MC_STATUS);
 178
 179         } while (mc_status & 0x3);
 180
 181         mfc_write(dev, 0x0, S5P_FIMV_SW_RESET);
 182         mfc_write(dev, 0x3fe, S5P_FIMV_SW_RESET);
 183         mfc_debug_leave();
 184         return 0;
 185 }
 186
 187 static inline void s5p_mfc_init_memctrl(struct s5p_mfc_dev *dev)
 188 {
 189         mfc_write(dev, dev->bank1, S5P_FIMV_MC_DRAMBASE_ADR_A);
 190         mfc_write(dev, dev->bank2, S5P_FIMV_MC_DRAMBASE_ADR_B);
 191         mfc_debug(2, "Bank1: %08x, Bank2: %08x\n", dev->bank1, dev->bank2);
 192 }
 193
 194 static inline void s5p_mfc_clear_cmds(struct s5p_mfc_dev *dev)
 195 {
 196         mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH0_INST_ID);
 197         mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH1_INST_ID);
 198         mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD);
 199         mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD);
 200 }
 201
 202 /* Initialize hardware */
 203 int s5p_mfc_init_hw(struct s5p_mfc_dev *dev)
 204 {
 205         unsigned int ver;
 206         int ret;
 207
 208         mfc_debug_enter();
 209         if (!s5p_mfc_bitproc_buf)
 210                 return -EINVAL;
 211
 212         /* 0. MFC reset */
 213         mfc_debug(2, "MFC reset..\n");
 214         s5p_mfc_clock_on();
 215         ret = s5p_mfc_reset(dev);
 216         if (ret) {
 217                 mfc_err("Failed to reset MFC - timeout\n");
 218                 return ret;
 219         }
 220         mfc_debug(2, "Done MFC reset..\n");
 221         /* 1. Set DRAM base Addr */
 222         s5p_mfc_init_memctrl(dev);
 223         /* 2. Initialize registers of channel I/F */
 224         s5p_mfc_clear_cmds(dev);
 225         /* 3. Release reset signal to the RISC */
 226         s5p_mfc_clean_dev_int_flags(dev);
 227         mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET);
 228         mfc_debug(2, "Will now wait for completion of firmware transfer\n");
 229         if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_FW_STATUS_RET)) {
 230                 mfc_err("Failed to load firmware\n");
 231                 s5p_mfc_reset(dev);
 232                 s5p_mfc_clock_off();
 233                 return -EIO;
 234         }
 235         s5p_mfc_clean_dev_int_flags(dev);
 236         /* 4. Initialize firmware */
 237         ret = s5p_mfc_sys_init_cmd(dev);
 238         if (ret) {
 239                 mfc_err("Failed to send command to MFC - timeout\n");
 240                 s5p_mfc_reset(dev);
 241                 s5p_mfc_clock_off();
 242                 return ret;
 243         }
 244         mfc_debug(2, "Ok, now will write a command to init the system\n");
 245         if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_SYS_INIT_RET)) {
 246                 mfc_err("Failed to load firmware\n");
 247                 s5p_mfc_reset(dev);
 248                 s5p_mfc_clock_off();
 249                 return -EIO;
 250         }
 251         dev->int_cond = 0;
 252         if (dev->int_err != 0 || dev->int_type !=
 253                                         S5P_FIMV_R2H_CMD_SYS_INIT_RET) {
 254                 /* Failure. */
 255                 mfc_err("Failed to init firmware - error: %d int: %d\n",
 256                                                 dev->int_err, dev->int_type);
 257                 s5p_mfc_reset(dev);
 258                 s5p_mfc_clock_off();
 259                 return -EIO;
 260         }
 261         ver = mfc_read(dev, S5P_FIMV_FW_VERSION);
 262         mfc_debug(2, "MFC F/W version : %02xyy, %02xmm, %02xdd\n",
 263                 (ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF);
 264         s5p_mfc_clock_off();
 265         mfc_debug_leave();
 266         return 0;
 267 }
 268
 269
 270 int s5p_mfc_sleep(struct s5p_mfc_dev *dev)
 271 {
 272         int ret;
 273
 274         mfc_debug_enter();
 275         s5p_mfc_clock_on();
 276         s5p_mfc_clean_dev_int_flags(dev);
 277         ret = s5p_mfc_sleep_cmd(dev);
 278         if (ret) {
 279                 mfc_err("Failed to send command to MFC - timeout\n");
 280                 return ret;
 281         }
 282         if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_SLEEP_RET)) {
 283                 mfc_err("Failed to sleep\n");
 284                 return -EIO;
 285         }
 286         s5p_mfc_clock_off();
 287         dev->int_cond = 0;
 288         if (dev->int_err != 0 || dev->int_type !=
 289                                                 S5P_FIMV_R2H_CMD_SLEEP_RET) {
 290                 /* Failure. */
 291                 mfc_err("Failed to sleep - error: %d int: %d\n", dev->int_err,
 292                                                                 dev->int_type);
 293                 return -EIO;
 294         }
 295         mfc_debug_leave();
 296         return ret;
 297 }
 298
 299 int s5p_mfc_wakeup(struct s5p_mfc_dev *dev)
 300 {
 301         int ret;
 302
 303         mfc_debug_enter();
 304         /* 0. MFC reset */
 305         mfc_debug(2, "MFC reset..\n");
 306         s5p_mfc_clock_on();
 307         ret = s5p_mfc_reset(dev);
 308         if (ret) {
 309                 mfc_err("Failed to reset MFC - timeout\n");
 310                 return ret;
 311         }
 312         mfc_debug(2, "Done MFC reset..\n");
 313         /* 1. Set DRAM base Addr */
 314         s5p_mfc_init_memctrl(dev);
 315         /* 2. Initialize registers of channel I/F */
 316         s5p_mfc_clear_cmds(dev);
 317         s5p_mfc_clean_dev_int_flags(dev);
 318         /* 3. Initialize firmware */
 319         ret = s5p_mfc_wakeup_cmd(dev);
 320         if (ret) {
 321                 mfc_err("Failed to send command to MFC - timeout\n");
 322                 return ret;
 323         }
 324         /* 4. Release reset signal to the RISC */
 325         mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET);
 326         mfc_debug(2, "Ok, now will write a command to wakeup the system\n");
 327         if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_WAKEUP_RET)) {
 328                 mfc_err("Failed to load firmware\n");
 329                 return -EIO;
 330         }
 331         s5p_mfc_clock_off();
 332         dev->int_cond = 0;
 333         if (dev->int_err != 0 || dev->int_type !=
 334                                                 S5P_FIMV_R2H_CMD_WAKEUP_RET) {
 335                 /* Failure. */
 336                 mfc_err("Failed to wakeup - error: %d int: %d\n", dev->int_err,
 337                                                                 dev->int_type);
 338                 return -EIO;
 339         }
 340         mfc_debug_leave();
 341         return 0;
 342 }
 343