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 33 /* Decide on number of packets for each buffer */ 34 #define STK1160_NUM_PACKETS 64 35 36 /* Number of buffers for isoc transfers */ 37 #define STK1160_NUM_BUFS 16 38 #define STK1160_MIN_BUFS 1 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 50 #define STK1160_MAX_INPUT 4 51 #define STK1160_SVIDEO_INPUT 4 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; 146 147 /* frame properties */ 148 int width; /* current frame width */ 149 int height; /* current frame height */ 150 unsigned int ctl_input; /* selected input */ 151 v4l2_std_id norm; /* current norm */ 152 struct stk1160_fmt *fmt; /* selected format */ 153 154 unsigned int field_count; /* not sure ??? */ 155 enum v4l2_field field; /* also not sure :/ */ 156 157 /* i2c i/o */ 158 struct i2c_adapter i2c_adap; 159 struct i2c_client i2c_client; 160 161 struct mutex v4l_lock; 162 struct mutex vb_queue_lock; 163 spinlock_t buf_lock; 164 165 struct file *fh_owner; /* filehandle ownership */ 166 167 /* EXPERIMENTAL */ 168 struct snd_card *snd_card; 169 }; 170 171 struct regval { 172 u16 reg; 173 u16 val; 174 }; 175 176 /* Provided by stk1160-v4l.c */ 177 int stk1160_vb2_setup(struct stk1160 *dev); 178 int stk1160_video_register(struct stk1160 *dev); 179 void stk1160_video_unregister(struct stk1160 *dev); 180 void stk1160_clear_queue(struct stk1160 *dev); 181 182 /* Provided by stk1160-video.c */ 183 int stk1160_alloc_isoc(struct stk1160 *dev); 184 void stk1160_free_isoc(struct stk1160 *dev); 185 void stk1160_cancel_isoc(struct stk1160 *dev); 186 void stk1160_uninit_isoc(struct stk1160 *dev); 187 188 /* Provided by stk1160-i2c.c */ 189 int stk1160_i2c_register(struct stk1160 *dev); 190 int stk1160_i2c_unregister(struct stk1160 *dev); 191 192 /* Provided by stk1160-core.c */ 193 int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value); 194 int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value); 195 int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg, 196 char *buf, int len); 197 int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg, 198 char *buf, int len); 199 void stk1160_select_input(struct stk1160 *dev); 200 201 /* Provided by stk1160-ac97.c */ 202 #ifdef CONFIG_VIDEO_STK1160_AC97 203 int stk1160_ac97_register(struct stk1160 *dev); 204 int stk1160_ac97_unregister(struct stk1160 *dev); 205 #else 206 static inline int stk1160_ac97_register(struct stk1160 *dev) { return 0; } 207 static inline int stk1160_ac97_unregister(struct stk1160 *dev) { return 0; } 208 #endif 209 210