1 files changed, 120 insertions, 0 deletions

diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_cmd.c b/drivers/media/video/s5p-mfc/s5p_mfc_cmd.c
new file mode 100644
index 00000000000..f0665ed1a52
--- /dev/null
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_cmd.c
@@ -0,0 +1,120 @@
+/*
+ * 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;
+}
+