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9cb2173e EG |
1 | /* |
2 | * STK1160 driver | |
3 | * | |
4 | * Copyright (C) 2012 Ezequiel Garcia | |
5 | * <elezegarcia--a.t--gmail.com> | |
6 | * | |
7 | * Based on Easycap driver by R.M. Thomas | |
8 | * Copyright (C) 2010 R.M. Thomas | |
9 | * <rmthomas--a.t--sciolus.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/i2c.h> | |
24 | #include <sound/core.h> | |
25 | #include <sound/ac97_codec.h> | |
c139990e | 26 | #include <media/videobuf2-v4l2.h> |
9cb2173e EG |
27 | #include <media/v4l2-device.h> |
28 | #include <media/v4l2-ctrls.h> | |
29 | ||
30 | #define STK1160_VERSION "0.9.5" | |
31 | #define STK1160_VERSION_NUM 0x000905 | |
32 | ||
2902fb7e | 33 | /* Decide on number of packets for each buffer */ |
9cb2173e EG |
34 | #define STK1160_NUM_PACKETS 64 |
35 | ||
36 | /* Number of buffers for isoc transfers */ | |
2902fb7e EG |
37 | #define STK1160_NUM_BUFS 16 |
38 | #define STK1160_MIN_BUFS 1 | |
9cb2173e EG |
39 | |
40 | /* TODO: This endpoint address should be retrieved */ | |
41 | #define STK1160_EP_VIDEO 0x82 | |
42 | #define STK1160_EP_AUDIO 0x81 | |
43 | ||
44 | /* Max and min video buffers */ | |
45 | #define STK1160_MIN_VIDEO_BUFFERS 8 | |
46 | #define STK1160_MAX_VIDEO_BUFFERS 32 | |
47 | ||
48 | #define STK1160_MIN_PKT_SIZE 3072 | |
49 | ||
56a960bf EG |
50 | #define STK1160_MAX_INPUT 4 |
51 | #define STK1160_SVIDEO_INPUT 4 | |
9cb2173e EG |
52 | |
53 | #define STK1160_I2C_TIMEOUT 100 | |
54 | ||
55 | /* TODO: Print helpers | |
56 | * I could use dev_xxx, pr_xxx, v4l2_xxx or printk. | |
57 | * However, there isn't a solid consensus on which | |
58 | * new drivers should use. | |
59 | * | |
60 | */ | |
9cb2173e EG |
61 | #ifdef DEBUG |
62 | #define stk1160_dbg(fmt, args...) \ | |
63 | printk(KERN_DEBUG "stk1160: " fmt, ## args) | |
64 | #else | |
65 | #define stk1160_dbg(fmt, args...) | |
66 | #endif | |
67 | ||
68 | #define stk1160_info(fmt, args...) \ | |
69 | pr_info("stk1160: " fmt, ## args) | |
70 | ||
71 | #define stk1160_warn(fmt, args...) \ | |
72 | pr_warn("stk1160: " fmt, ## args) | |
73 | ||
74 | #define stk1160_err(fmt, args...) \ | |
75 | pr_err("stk1160: " fmt, ## args) | |
76 | ||
77 | /* Buffer for one video frame */ | |
78 | struct stk1160_buffer { | |
79 | /* common v4l buffer stuff -- must be first */ | |
2d700715 | 80 | struct vb2_v4l2_buffer vb; |
9cb2173e EG |
81 | struct list_head list; |
82 | ||
83 | void *mem; | |
84 | unsigned int length; /* buffer length */ | |
85 | unsigned int bytesused; /* bytes written */ | |
86 | int odd; /* current oddity */ | |
87 | ||
88 | /* | |
89 | * Since we interlace two fields per frame, | |
90 | * this is different from bytesused. | |
91 | */ | |
92 | unsigned int pos; /* current pos inside buffer */ | |
93 | }; | |
94 | ||
95 | struct stk1160_isoc_ctl { | |
96 | /* max packet size of isoc transaction */ | |
97 | int max_pkt_size; | |
98 | ||
99 | /* number of allocated urbs */ | |
100 | int num_bufs; | |
101 | ||
102 | /* urb for isoc transfers */ | |
103 | struct urb **urb; | |
104 | ||
105 | /* transfer buffers for isoc transfer */ | |
106 | char **transfer_buffer; | |
107 | ||
108 | /* current buffer */ | |
109 | struct stk1160_buffer *buf; | |
110 | }; | |
111 | ||
112 | struct stk1160_fmt { | |
113 | char *name; | |
114 | u32 fourcc; /* v4l2 format id */ | |
115 | int depth; | |
116 | }; | |
117 | ||
118 | struct stk1160 { | |
119 | struct v4l2_device v4l2_dev; | |
120 | struct video_device vdev; | |
121 | struct v4l2_ctrl_handler ctrl_handler; | |
122 | ||
123 | struct device *dev; | |
124 | struct usb_device *udev; | |
125 | ||
126 | /* saa7115 subdev */ | |
127 | struct v4l2_subdev *sd_saa7115; | |
128 | ||
129 | /* isoc control struct */ | |
130 | struct list_head avail_bufs; | |
131 | ||
132 | /* video capture */ | |
133 | struct vb2_queue vb_vidq; | |
134 | ||
135 | /* max packet size of isoc transaction */ | |
136 | int max_pkt_size; | |
137 | /* array of wMaxPacketSize */ | |
138 | unsigned int *alt_max_pkt_size; | |
139 | /* alternate */ | |
140 | int alt; | |
141 | /* Number of alternative settings */ | |
142 | int num_alt; | |
143 | ||
144 | struct stk1160_isoc_ctl isoc_ctl; | |
9cb2173e EG |
145 | |
146 | /* frame properties */ | |
147 | int width; /* current frame width */ | |
148 | int height; /* current frame height */ | |
149 | unsigned int ctl_input; /* selected input */ | |
150 | v4l2_std_id norm; /* current norm */ | |
151 | struct stk1160_fmt *fmt; /* selected format */ | |
152 | ||
e3e30f63 | 153 | unsigned int sequence; |
9cb2173e EG |
154 | |
155 | /* i2c i/o */ | |
156 | struct i2c_adapter i2c_adap; | |
157 | struct i2c_client i2c_client; | |
158 | ||
159 | struct mutex v4l_lock; | |
160 | struct mutex vb_queue_lock; | |
161 | spinlock_t buf_lock; | |
162 | ||
163 | struct file *fh_owner; /* filehandle ownership */ | |
164 | ||
165 | /* EXPERIMENTAL */ | |
166 | struct snd_card *snd_card; | |
167 | }; | |
168 | ||
169 | struct regval { | |
170 | u16 reg; | |
171 | u16 val; | |
172 | }; | |
173 | ||
174 | /* Provided by stk1160-v4l.c */ | |
175 | int stk1160_vb2_setup(struct stk1160 *dev); | |
176 | int stk1160_video_register(struct stk1160 *dev); | |
177 | void stk1160_video_unregister(struct stk1160 *dev); | |
178 | void stk1160_clear_queue(struct stk1160 *dev); | |
179 | ||
180 | /* Provided by stk1160-video.c */ | |
181 | int stk1160_alloc_isoc(struct stk1160 *dev); | |
182 | void stk1160_free_isoc(struct stk1160 *dev); | |
183 | void stk1160_cancel_isoc(struct stk1160 *dev); | |
184 | void stk1160_uninit_isoc(struct stk1160 *dev); | |
185 | ||
186 | /* Provided by stk1160-i2c.c */ | |
187 | int stk1160_i2c_register(struct stk1160 *dev); | |
188 | int stk1160_i2c_unregister(struct stk1160 *dev); | |
189 | ||
190 | /* Provided by stk1160-core.c */ | |
191 | int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value); | |
192 | int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value); | |
193 | int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg, | |
194 | char *buf, int len); | |
195 | int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg, | |
196 | char *buf, int len); | |
197 | void stk1160_select_input(struct stk1160 *dev); | |
198 | ||
199 | /* Provided by stk1160-ac97.c */ | |
200 | #ifdef CONFIG_VIDEO_STK1160_AC97 | |
201 | int stk1160_ac97_register(struct stk1160 *dev); | |
202 | int stk1160_ac97_unregister(struct stk1160 *dev); | |
203 | #else | |
204 | static inline int stk1160_ac97_register(struct stk1160 *dev) { return 0; } | |
205 | static inline int stk1160_ac97_unregister(struct stk1160 *dev) { return 0; } | |
206 | #endif | |
207 |