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- /*
- * linux/drivers/media/video/s5p-mfc/s5p_mfc_cmd.c
- *
- * Copyright (C) 2011 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 "regs-mfc.h"
- #include "s5p_mfc_cmd.h"
- #include "s5p_mfc_common.h"
- #include "s5p_mfc_debug.h"
- /* This function is used to send a command to the MFC */
- static int s5p_mfc_cmd_host2risc(struct s5p_mfc_dev *dev, int cmd,
- struct s5p_mfc_cmd_args *args)
- {
- int cur_cmd;
- unsigned long timeout;
- timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT);
- /* wait until host to risc command register becomes 'H2R_CMD_EMPTY' */
- do {
- if (time_after(jiffies, timeout)) {
- mfc_err("Timeout while waiting for hardware\n");
- return -EIO;
- }
- cur_cmd = mfc_read(dev, S5P_FIMV_HOST2RISC_CMD);
- } while (cur_cmd != S5P_FIMV_H2R_CMD_EMPTY);
- mfc_write(dev, args->arg[0], S5P_FIMV_HOST2RISC_ARG1);
- mfc_write(dev, args->arg[1], S5P_FIMV_HOST2RISC_ARG2);
- mfc_write(dev, args->arg[2], S5P_FIMV_HOST2RISC_ARG3);
- mfc_write(dev, args->arg[3], S5P_FIMV_HOST2RISC_ARG4);
- /* Issue the command */
- mfc_write(dev, cmd, S5P_FIMV_HOST2RISC_CMD);
- return 0;
- }
- /* Initialize the MFC */
- int s5p_mfc_sys_init_cmd(struct s5p_mfc_dev *dev)
- {
- struct s5p_mfc_cmd_args h2r_args;
- memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args));
- h2r_args.arg[0] = dev->fw_size;
- return s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_SYS_INIT, &h2r_args);
- }
- /* Suspend the MFC hardware */
- int s5p_mfc_sleep_cmd(struct s5p_mfc_dev *dev)
- {
- struct s5p_mfc_cmd_args h2r_args;
- memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args));
- return s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_SLEEP, &h2r_args);
- }
- /* Wake up the MFC hardware */
- int s5p_mfc_wakeup_cmd(struct s5p_mfc_dev *dev)
- {
- struct s5p_mfc_cmd_args h2r_args;
- memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args));
- return s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_WAKEUP, &h2r_args);
- }
- int s5p_mfc_open_inst_cmd(struct s5p_mfc_ctx *ctx)
- {
- struct s5p_mfc_dev *dev = ctx->dev;
- struct s5p_mfc_cmd_args h2r_args;
- int ret;
- /* Preparing decoding - getting instance number */
- mfc_debug(2, "Getting instance number (codec: %d)\n", ctx->codec_mode);
- dev->curr_ctx = ctx->num;
- memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args));
- h2r_args.arg[0] = ctx->codec_mode;
- h2r_args.arg[1] = 0; /* no crc & no pixelcache */
- h2r_args.arg[2] = ctx->ctx_ofs;
- h2r_args.arg[3] = ctx->ctx_size;
- ret = s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_OPEN_INSTANCE,
- &h2r_args);
- if (ret) {
- mfc_err("Failed to create a new instance\n");
- ctx->state = MFCINST_ERROR;
- }
- return ret;
- }
- int s5p_mfc_close_inst_cmd(struct s5p_mfc_ctx *ctx)
- {
- struct s5p_mfc_dev *dev = ctx->dev;
- struct s5p_mfc_cmd_args h2r_args;
- int ret;
- if (ctx->state == MFCINST_FREE) {
- mfc_err("Instance already returned\n");
- ctx->state = MFCINST_ERROR;
- return -EINVAL;
- }
- /* Closing decoding instance */
- mfc_debug(2, "Returning instance number %d\n", ctx->inst_no);
- dev->curr_ctx = ctx->num;
- memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args));
- h2r_args.arg[0] = ctx->inst_no;
- ret = s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_CLOSE_INSTANCE,
- &h2r_args);
- if (ret) {
- mfc_err("Failed to return an instance\n");
- ctx->state = MFCINST_ERROR;
- return -EINVAL;
- }
- return 0;
- }
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