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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> | |
26 | #include <media/videobuf2-core.h> | |
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 | */ | |
61 | #define DEBUG | |
62 | #ifdef DEBUG | |
63 | #define stk1160_dbg(fmt, args...) \ | |
64 | printk(KERN_DEBUG "stk1160: " fmt, ## args) | |
65 | #else | |
66 | #define stk1160_dbg(fmt, args...) | |
67 | #endif | |
68 | ||
69 | #define stk1160_info(fmt, args...) \ | |
70 | pr_info("stk1160: " fmt, ## args) | |
71 | ||
72 | #define stk1160_warn(fmt, args...) \ | |
73 | pr_warn("stk1160: " fmt, ## args) | |
74 | ||
75 | #define stk1160_err(fmt, args...) \ | |
76 | pr_err("stk1160: " fmt, ## args) | |
77 | ||
78 | /* Buffer for one video frame */ | |
79 | struct stk1160_buffer { | |
80 | /* common v4l buffer stuff -- must be first */ | |
81 | struct vb2_buffer vb; | |
82 | struct list_head list; | |
83 | ||
84 | void *mem; | |
85 | unsigned int length; /* buffer length */ | |
86 | unsigned int bytesused; /* bytes written */ | |
87 | int odd; /* current oddity */ | |
88 | ||
89 | /* | |
90 | * Since we interlace two fields per frame, | |
91 | * this is different from bytesused. | |
92 | */ | |
93 | unsigned int pos; /* current pos inside buffer */ | |
94 | }; | |
95 | ||
96 | struct stk1160_isoc_ctl { | |
97 | /* max packet size of isoc transaction */ | |
98 | int max_pkt_size; | |
99 | ||
100 | /* number of allocated urbs */ | |
101 | int num_bufs; | |
102 | ||
103 | /* urb for isoc transfers */ | |
104 | struct urb **urb; | |
105 | ||
106 | /* transfer buffers for isoc transfer */ | |
107 | char **transfer_buffer; | |
108 | ||
109 | /* current buffer */ | |
110 | struct stk1160_buffer *buf; | |
111 | }; | |
112 | ||
113 | struct stk1160_fmt { | |
114 | char *name; | |
115 | u32 fourcc; /* v4l2 format id */ | |
116 | int depth; | |
117 | }; | |
118 | ||
119 | struct stk1160 { | |
120 | struct v4l2_device v4l2_dev; | |
121 | struct video_device vdev; | |
122 | struct v4l2_ctrl_handler ctrl_handler; | |
123 | ||
124 | struct device *dev; | |
125 | struct usb_device *udev; | |
126 | ||
127 | /* saa7115 subdev */ | |
128 | struct v4l2_subdev *sd_saa7115; | |
129 | ||
130 | /* isoc control struct */ | |
131 | struct list_head avail_bufs; | |
132 | ||
133 | /* video capture */ | |
134 | struct vb2_queue vb_vidq; | |
135 | ||
136 | /* max packet size of isoc transaction */ | |
137 | int max_pkt_size; | |
138 | /* array of wMaxPacketSize */ | |
139 | unsigned int *alt_max_pkt_size; | |
140 | /* alternate */ | |
141 | int alt; | |
142 | /* Number of alternative settings */ | |
143 | int num_alt; | |
144 | ||
145 | struct stk1160_isoc_ctl isoc_ctl; | |
146 | char urb_buf[255]; /* urb control msg buffer */ | |
147 | ||
148 | /* frame properties */ | |
149 | int width; /* current frame width */ | |
150 | int height; /* current frame height */ | |
151 | unsigned int ctl_input; /* selected input */ | |
152 | v4l2_std_id norm; /* current norm */ | |
153 | struct stk1160_fmt *fmt; /* selected format */ | |
154 | ||
155 | unsigned int field_count; /* not sure ??? */ | |
156 | enum v4l2_field field; /* also not sure :/ */ | |
157 | ||
158 | /* i2c i/o */ | |
159 | struct i2c_adapter i2c_adap; | |
160 | struct i2c_client i2c_client; | |
161 | ||
162 | struct mutex v4l_lock; | |
163 | struct mutex vb_queue_lock; | |
164 | spinlock_t buf_lock; | |
165 | ||
166 | struct file *fh_owner; /* filehandle ownership */ | |
167 | ||
168 | /* EXPERIMENTAL */ | |
169 | struct snd_card *snd_card; | |
170 | }; | |
171 | ||
172 | struct regval { | |
173 | u16 reg; | |
174 | u16 val; | |
175 | }; | |
176 | ||
177 | /* Provided by stk1160-v4l.c */ | |
178 | int stk1160_vb2_setup(struct stk1160 *dev); | |
179 | int stk1160_video_register(struct stk1160 *dev); | |
180 | void stk1160_video_unregister(struct stk1160 *dev); | |
181 | void stk1160_clear_queue(struct stk1160 *dev); | |
182 | ||
183 | /* Provided by stk1160-video.c */ | |
184 | int stk1160_alloc_isoc(struct stk1160 *dev); | |
185 | void stk1160_free_isoc(struct stk1160 *dev); | |
186 | void stk1160_cancel_isoc(struct stk1160 *dev); | |
187 | void stk1160_uninit_isoc(struct stk1160 *dev); | |
188 | ||
189 | /* Provided by stk1160-i2c.c */ | |
190 | int stk1160_i2c_register(struct stk1160 *dev); | |
191 | int stk1160_i2c_unregister(struct stk1160 *dev); | |
192 | ||
193 | /* Provided by stk1160-core.c */ | |
194 | int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value); | |
195 | int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value); | |
196 | int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg, | |
197 | char *buf, int len); | |
198 | int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg, | |
199 | char *buf, int len); | |
200 | void stk1160_select_input(struct stk1160 *dev); | |
201 | ||
202 | /* Provided by stk1160-ac97.c */ | |
203 | #ifdef CONFIG_VIDEO_STK1160_AC97 | |
204 | int stk1160_ac97_register(struct stk1160 *dev); | |
205 | int stk1160_ac97_unregister(struct stk1160 *dev); | |
206 | #else | |
207 | static inline int stk1160_ac97_register(struct stk1160 *dev) { return 0; } | |
208 | static inline int stk1160_ac97_unregister(struct stk1160 *dev) { return 0; } | |
209 | #endif | |
210 |