/* * linux/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c * * Copyright (c) 2010 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/delay.h> #include <linux/err.h> #include <linux/firmware.h> #include <linux/jiffies.h> #include <linux/sched.h> #include "s5p_mfc_cmd.h" #include "s5p_mfc_common.h" #include "s5p_mfc_debug.h" #include "s5p_mfc_intr.h" #include "s5p_mfc_opr.h" #include "s5p_mfc_pm.h" #include "s5p_mfc_ctrl.h" /* Allocate memory for firmware */ int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev) { void *bank2_virt; dma_addr_t bank2_dma_addr; dev->fw_size = dev->variant->buf_size->fw; if (dev->fw_virt_addr) { mfc_err("Attempting to allocate firmware when it seems that it is already loaded\n"); return -ENOMEM; } dev->fw_virt_addr = dma_alloc_coherent(dev->mem_dev_l, dev->fw_size, &dev->bank1, GFP_KERNEL); if (!dev->fw_virt_addr) { mfc_err("Allocating bitprocessor buffer failed\n"); return -ENOMEM; } if (HAS_PORTNUM(dev) && IS_TWOPORT(dev)) { bank2_virt = dma_alloc_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER, &bank2_dma_addr, GFP_KERNEL); if (!bank2_virt) { mfc_err("Allocating bank2 base failed\n"); dma_free_coherent(dev->mem_dev_l, dev->fw_size, dev->fw_virt_addr, dev->bank1); dev->fw_virt_addr = NULL; return -ENOMEM; } /* Valid buffers passed to MFC encoder with LAST_FRAME command * should not have address of bank2 - MFC will treat it as a null frame. * To avoid such situation we set bank2 address below the pool address. */ dev->bank2 = bank2_dma_addr - (1 << MFC_BASE_ALIGN_ORDER); dma_free_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER, bank2_virt, bank2_dma_addr); } else { /* In this case bank2 can point to the same address as bank1. * Firmware will always occupy the beginning of this area so it is * impossible having a video frame buffer with zero address. */ dev->bank2 = dev->bank1; } return 0; } /* Load firmware */ int s5p_mfc_load_firmware(struct s5p_mfc_dev *dev) { struct firmware *fw_blob; int i, err = -EINVAL; /* Firmare has to be present as a separate file or compiled * into kernel. */ mfc_debug_enter(); for (i = MFC_FW_MAX_VERSIONS - 1; i >= 0; i--) { if (!dev->variant->fw_name[i]) continue; err = request_firmware((const struct firmware **)&fw_blob, dev->variant->fw_name[i], dev->v4l2_dev.dev); if (!err) { dev->fw_ver = (enum s5p_mfc_fw_ver) i; break; } } if (err != 0) { mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n"); return -EINVAL; } if (fw_blob->size > dev->fw_size) { mfc_err("MFC firmware is too big to be loaded\n"); release_firmware(fw_blob); return -ENOMEM; } if (!dev->fw_virt_addr) { mfc_err("MFC firmware is not allocated\n"); release_firmware(fw_blob); return -EINVAL; } memcpy(dev->fw_virt_addr, fw_blob->data, fw_blob->size); wmb(); release_firmware(fw_blob); mfc_debug_leave(); return 0; } /* Release firmware memory */ int s5p_mfc_release_firmware(struct s5p_mfc_dev *dev) { /* Before calling this function one has to make sure * that MFC is no longer processing */ if (!dev->fw_virt_addr) return -EINVAL; dma_free_coherent(dev->mem_dev_l, dev->fw_size, dev->fw_virt_addr, dev->bank1); dev->fw_virt_addr = NULL; return 0; } /* Reset the device */ int s5p_mfc_reset(struct s5p_mfc_dev *dev) { unsigned int mc_status; unsigned long timeout; int i; mfc_debug_enter(); if (IS_MFCV6_PLUS(dev)) { /* Reset IP */ /* except RISC, reset */ mfc_write(dev, 0xFEE, S5P_FIMV_MFC_RESET_V6); /* reset release */ mfc_write(dev, 0x0, S5P_FIMV_MFC_RESET_V6); /* Zero Initialization of MFC registers */ mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD_V6); mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD_V6); mfc_write(dev, 0, S5P_FIMV_FW_VERSION_V6); for (i = 0; i < S5P_FIMV_REG_CLEAR_COUNT_V6; i++) mfc_write(dev, 0, S5P_FIMV_REG_CLEAR_BEGIN_V6 + (i*4)); /* Reset */ mfc_write(dev, 0, S5P_FIMV_RISC_ON_V6); mfc_write(dev, 0x1FFF, S5P_FIMV_MFC_RESET_V6); mfc_write(dev, 0, S5P_FIMV_MFC_RESET_V6); } else { /* Stop procedure */ /* reset RISC */ mfc_write(dev, 0x3f6, S5P_FIMV_SW_RESET); /* All reset except for MC */ mfc_write(dev, 0x3e2, S5P_FIMV_SW_RESET); mdelay(10); timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT); /* Check MC status */ do { if (time_after(jiffies, timeout)) { mfc_err("Timeout while resetting MFC\n"); return -EIO; } mc_status = mfc_read(dev, S5P_FIMV_MC_STATUS); } while (mc_status & 0x3); mfc_write(dev, 0x0, S5P_FIMV_SW_RESET); mfc_write(dev, 0x3fe, S5P_FIMV_SW_RESET); } mfc_debug_leave(); return 0; } static inline void s5p_mfc_init_memctrl(struct s5p_mfc_dev *dev) { if (IS_MFCV6_PLUS(dev)) { mfc_write(dev, dev->bank1, S5P_FIMV_RISC_BASE_ADDRESS_V6); mfc_debug(2, "Base Address : %pad\n", &dev->bank1); } else { mfc_write(dev, dev->bank1, S5P_FIMV_MC_DRAMBASE_ADR_A); mfc_write(dev, dev->bank2, S5P_FIMV_MC_DRAMBASE_ADR_B); mfc_debug(2, "Bank1: %pad, Bank2: %pad\n", &dev->bank1, &dev->bank2); } } static inline void s5p_mfc_clear_cmds(struct s5p_mfc_dev *dev) { if (IS_MFCV6_PLUS(dev)) { /* Zero initialization should be done before RESET. * Nothing to do here. */ } else { mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH0_INST_ID); mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH1_INST_ID); mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD); mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD); } } /* Initialize hardware */ int s5p_mfc_init_hw(struct s5p_mfc_dev *dev) { unsigned int ver; int ret; mfc_debug_enter(); if (!dev->fw_virt_addr) { mfc_err("Firmware memory is not allocated.\n"); return -EINVAL; } /* 0. MFC reset */ mfc_debug(2, "MFC reset..\n"); s5p_mfc_clock_on(); ret = s5p_mfc_reset(dev); if (ret) { mfc_err("Failed to reset MFC - timeout\n"); return ret; } mfc_debug(2, "Done MFC reset..\n"); /* 1. Set DRAM base Addr */ s5p_mfc_init_memctrl(dev); /* 2. Initialize registers of channel I/F */ s5p_mfc_clear_cmds(dev); /* 3. Release reset signal to the RISC */ s5p_mfc_clean_dev_int_flags(dev); if (IS_MFCV6_PLUS(dev)) mfc_write(dev, 0x1, S5P_FIMV_RISC_ON_V6); else mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET); mfc_debug(2, "Will now wait for completion of firmware transfer\n"); if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_FW_STATUS_RET)) { mfc_err("Failed to load firmware\n"); s5p_mfc_reset(dev); s5p_mfc_clock_off(); return -EIO; } s5p_mfc_clean_dev_int_flags(dev); /* 4. Initialize firmware */ ret = s5p_mfc_hw_call(dev->mfc_cmds, sys_init_cmd, dev); if (ret) { mfc_err("Failed to send command to MFC - timeout\n"); s5p_mfc_reset(dev); s5p_mfc_clock_off(); return ret; } mfc_debug(2, "Ok, now will wait for completion of hardware init\n"); if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_SYS_INIT_RET)) { mfc_err("Failed to init hardware\n"); s5p_mfc_reset(dev); s5p_mfc_clock_off(); return -EIO; } dev->int_cond = 0; if (dev->int_err != 0 || dev->int_type != S5P_MFC_R2H_CMD_SYS_INIT_RET) { /* Failure. */ mfc_err("Failed to init firmware - error: %d int: %d\n", dev->int_err, dev->int_type); s5p_mfc_reset(dev); s5p_mfc_clock_off(); return -EIO; } if (IS_MFCV6_PLUS(dev)) ver = mfc_read(dev, S5P_FIMV_FW_VERSION_V6); else ver = mfc_read(dev, S5P_FIMV_FW_VERSION); mfc_debug(2, "MFC F/W version : %02xyy, %02xmm, %02xdd\n", (ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF); s5p_mfc_clock_off(); mfc_debug_leave(); return 0; } /* Deinitialize hardware */ void s5p_mfc_deinit_hw(struct s5p_mfc_dev *dev) { s5p_mfc_clock_on(); s5p_mfc_reset(dev); s5p_mfc_hw_call_void(dev->mfc_ops, release_dev_context_buffer, dev); s5p_mfc_clock_off(); } int s5p_mfc_sleep(struct s5p_mfc_dev *dev) { int ret; mfc_debug_enter(); s5p_mfc_clock_on(); s5p_mfc_clean_dev_int_flags(dev); ret = s5p_mfc_hw_call(dev->mfc_cmds, sleep_cmd, dev); if (ret) { mfc_err("Failed to send command to MFC - timeout\n"); return ret; } if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_SLEEP_RET)) { mfc_err("Failed to sleep\n"); return -EIO; } s5p_mfc_clock_off(); dev->int_cond = 0; if (dev->int_err != 0 || dev->int_type != S5P_MFC_R2H_CMD_SLEEP_RET) { /* Failure. */ mfc_err("Failed to sleep - error: %d int: %d\n", dev->int_err, dev->int_type); return -EIO; } mfc_debug_leave(); return ret; } int s5p_mfc_wakeup(struct s5p_mfc_dev *dev) { int ret; mfc_debug_enter(); /* 0. MFC reset */ mfc_debug(2, "MFC reset..\n"); s5p_mfc_clock_on(); ret = s5p_mfc_reset(dev); if (ret) { mfc_err("Failed to reset MFC - timeout\n"); return ret; } mfc_debug(2, "Done MFC reset..\n"); /* 1. Set DRAM base Addr */ s5p_mfc_init_memctrl(dev); /* 2. Initialize registers of channel I/F */ s5p_mfc_clear_cmds(dev); s5p_mfc_clean_dev_int_flags(dev); /* 3. Initialize firmware */ ret = s5p_mfc_hw_call(dev->mfc_cmds, wakeup_cmd, dev); if (ret) { mfc_err("Failed to send command to MFC - timeout\n"); return ret; } /* 4. Release reset signal to the RISC */ if (IS_MFCV6_PLUS(dev)) mfc_write(dev, 0x1, S5P_FIMV_RISC_ON_V6); else mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET); mfc_debug(2, "Ok, now will write a command to wakeup the system\n"); if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_WAKEUP_RET)) { mfc_err("Failed to load firmware\n"); return -EIO; } s5p_mfc_clock_off(); dev->int_cond = 0; if (dev->int_err != 0 || dev->int_type != S5P_MFC_R2H_CMD_WAKEUP_RET) { /* Failure. */ mfc_err("Failed to wakeup - error: %d int: %d\n", dev->int_err, dev->int_type); return -EIO; } mfc_debug_leave(); return 0; } int s5p_mfc_open_mfc_inst(struct s5p_mfc_dev *dev, struct s5p_mfc_ctx *ctx) { int ret = 0; ret = s5p_mfc_hw_call(dev->mfc_ops, alloc_instance_buffer, ctx); if (ret) { mfc_err("Failed allocating instance buffer\n"); goto err; } if (ctx->type == MFCINST_DECODER) { ret = s5p_mfc_hw_call(dev->mfc_ops, alloc_dec_temp_buffers, ctx); if (ret) { mfc_err("Failed allocating temporary buffers\n"); goto err_free_inst_buf; } } set_work_bit_irqsave(ctx); s5p_mfc_clean_ctx_int_flags(ctx); s5p_mfc_hw_call_void(dev->mfc_ops, try_run, dev); if (s5p_mfc_wait_for_done_ctx(ctx, S5P_MFC_R2H_CMD_OPEN_INSTANCE_RET, 0)) { /* Error or timeout */ mfc_err("Error getting instance from hardware\n"); ret = -EIO; goto err_free_desc_buf; } mfc_debug(2, "Got instance number: %d\n", ctx->inst_no); return ret; err_free_desc_buf: if (ctx->type == MFCINST_DECODER) s5p_mfc_hw_call_void(dev->mfc_ops, release_dec_desc_buffer, ctx); err_free_inst_buf: s5p_mfc_hw_call_void(dev->mfc_ops, release_instance_buffer, ctx); err: return ret; } void s5p_mfc_close_mfc_inst(struct s5p_mfc_dev *dev, struct s5p_mfc_ctx *ctx) { ctx->state = MFCINST_RETURN_INST; set_work_bit_irqsave(ctx); s5p_mfc_clean_ctx_int_flags(ctx); s5p_mfc_hw_call_void(dev->mfc_ops, try_run, dev); /* Wait until instance is returned or timeout occurred */ if (s5p_mfc_wait_for_done_ctx(ctx, S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET, 0)) mfc_err("Err returning instance\n"); /* Free resources */ s5p_mfc_hw_call_void(dev->mfc_ops, release_codec_buffers, ctx); s5p_mfc_hw_call_void(dev->mfc_ops, release_instance_buffer, ctx); if (ctx->type == MFCINST_DECODER) s5p_mfc_hw_call_void(dev->mfc_ops, release_dec_desc_buffer, ctx); ctx->inst_no = MFC_NO_INSTANCE_SET; ctx->state = MFCINST_FREE; }