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1 | /* |
2 | * linux/drivers/media/video/s5p-mfc/s5p_mfc_cmd.c | |
3 | * | |
4 | * Copyright (C) 2011 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 "regs-mfc.h" | |
14 | #include "s5p_mfc_cmd.h" | |
15 | #include "s5p_mfc_common.h" | |
16 | #include "s5p_mfc_debug.h" | |
17 | ||
18 | /* This function is used to send a command to the MFC */ | |
19 | static int s5p_mfc_cmd_host2risc(struct s5p_mfc_dev *dev, int cmd, | |
20 | struct s5p_mfc_cmd_args *args) | |
21 | { | |
22 | int cur_cmd; | |
23 | unsigned long timeout; | |
24 | ||
25 | timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT); | |
26 | /* wait until host to risc command register becomes 'H2R_CMD_EMPTY' */ | |
27 | do { | |
28 | if (time_after(jiffies, timeout)) { | |
29 | mfc_err("Timeout while waiting for hardware\n"); | |
30 | return -EIO; | |
31 | } | |
32 | cur_cmd = mfc_read(dev, S5P_FIMV_HOST2RISC_CMD); | |
33 | } while (cur_cmd != S5P_FIMV_H2R_CMD_EMPTY); | |
34 | mfc_write(dev, args->arg[0], S5P_FIMV_HOST2RISC_ARG1); | |
35 | mfc_write(dev, args->arg[1], S5P_FIMV_HOST2RISC_ARG2); | |
36 | mfc_write(dev, args->arg[2], S5P_FIMV_HOST2RISC_ARG3); | |
37 | mfc_write(dev, args->arg[3], S5P_FIMV_HOST2RISC_ARG4); | |
38 | /* Issue the command */ | |
39 | mfc_write(dev, cmd, S5P_FIMV_HOST2RISC_CMD); | |
40 | return 0; | |
41 | } | |
42 | ||
43 | /* Initialize the MFC */ | |
44 | int s5p_mfc_sys_init_cmd(struct s5p_mfc_dev *dev) | |
45 | { | |
46 | struct s5p_mfc_cmd_args h2r_args; | |
47 | ||
48 | memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args)); | |
49 | h2r_args.arg[0] = dev->fw_size; | |
50 | return s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_SYS_INIT, &h2r_args); | |
51 | } | |
52 | ||
53 | /* Suspend the MFC hardware */ | |
54 | int s5p_mfc_sleep_cmd(struct s5p_mfc_dev *dev) | |
55 | { | |
56 | struct s5p_mfc_cmd_args h2r_args; | |
57 | ||
58 | memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args)); | |
59 | return s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_SLEEP, &h2r_args); | |
60 | } | |
61 | ||
62 | /* Wake up the MFC hardware */ | |
63 | int s5p_mfc_wakeup_cmd(struct s5p_mfc_dev *dev) | |
64 | { | |
65 | struct s5p_mfc_cmd_args h2r_args; | |
66 | ||
67 | memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args)); | |
68 | return s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_WAKEUP, &h2r_args); | |
69 | } | |
70 | ||
71 | ||
72 | int s5p_mfc_open_inst_cmd(struct s5p_mfc_ctx *ctx) | |
73 | { | |
74 | struct s5p_mfc_dev *dev = ctx->dev; | |
75 | struct s5p_mfc_cmd_args h2r_args; | |
76 | int ret; | |
77 | ||
78 | /* Preparing decoding - getting instance number */ | |
79 | mfc_debug(2, "Getting instance number (codec: %d)\n", ctx->codec_mode); | |
80 | dev->curr_ctx = ctx->num; | |
81 | memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args)); | |
82 | h2r_args.arg[0] = ctx->codec_mode; | |
83 | h2r_args.arg[1] = 0; /* no crc & no pixelcache */ | |
84 | h2r_args.arg[2] = ctx->ctx_ofs; | |
85 | h2r_args.arg[3] = ctx->ctx_size; | |
86 | ret = s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_OPEN_INSTANCE, | |
87 | &h2r_args); | |
88 | if (ret) { | |
89 | mfc_err("Failed to create a new instance\n"); | |
90 | ctx->state = MFCINST_ERROR; | |
91 | } | |
92 | return ret; | |
93 | } | |
94 | ||
95 | int s5p_mfc_close_inst_cmd(struct s5p_mfc_ctx *ctx) | |
96 | { | |
97 | struct s5p_mfc_dev *dev = ctx->dev; | |
98 | struct s5p_mfc_cmd_args h2r_args; | |
99 | int ret; | |
100 | ||
101 | if (ctx->state == MFCINST_FREE) { | |
102 | mfc_err("Instance already returned\n"); | |
103 | ctx->state = MFCINST_ERROR; | |
104 | return -EINVAL; | |
105 | } | |
106 | /* Closing decoding instance */ | |
107 | mfc_debug(2, "Returning instance number %d\n", ctx->inst_no); | |
108 | dev->curr_ctx = ctx->num; | |
109 | memset(&h2r_args, 0, sizeof(struct s5p_mfc_cmd_args)); | |
110 | h2r_args.arg[0] = ctx->inst_no; | |
111 | ret = s5p_mfc_cmd_host2risc(dev, S5P_FIMV_H2R_CMD_CLOSE_INSTANCE, | |
112 | &h2r_args); | |
113 | if (ret) { | |
114 | mfc_err("Failed to return an instance\n"); | |
115 | ctx->state = MFCINST_ERROR; | |
116 | return -EINVAL; | |
117 | } | |
118 | return 0; | |
119 | } | |
120 |