1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * STK1160 driver 4 * 5 * Copyright (C) 2012 Ezequiel Garcia 6 * <elezegarcia--a.t--gmail.com> 7 * 8 * Based on Easycap driver by R.M. Thomas 9 * Copyright (C) 2010 R.M. Thomas 10 * <rmthomas--a.t--sciolus.org> 11 */ 12 13 #include <linux/i2c.h> 14 #include <sound/core.h> 15 #include <sound/ac97_codec.h> 16 #include <media/videobuf2-v4l2.h> 17 #include <media/v4l2-device.h> 18 #include <media/v4l2-ctrls.h> 19 20 #define STK1160_VERSION "0.9.5" 21 #define STK1160_VERSION_NUM 0x000905 22 23 /* Decide on number of packets for each buffer */ 24 #define STK1160_NUM_PACKETS 64 25 26 /* Number of buffers for isoc transfers */ 27 #define STK1160_NUM_BUFS 16 28 #define STK1160_MIN_BUFS 1 29 30 /* TODO: This endpoint address should be retrieved */ 31 #define STK1160_EP_VIDEO 0x82 32 #define STK1160_EP_AUDIO 0x81 33 34 /* Max and min video buffers */ 35 #define STK1160_MIN_VIDEO_BUFFERS 8 36 #define STK1160_MAX_VIDEO_BUFFERS 32 37 38 #define STK1160_MIN_PKT_SIZE 3072 39 40 #define STK1160_MAX_INPUT 4 41 #define STK1160_SVIDEO_INPUT 4 42 43 #define STK1160_AC97_TIMEOUT 50 44 45 #define STK1160_I2C_TIMEOUT 100 46 47 /* TODO: Print helpers 48 * I could use dev_xxx, pr_xxx, v4l2_xxx or printk. 49 * However, there isn't a solid consensus on which 50 * new drivers should use. 51 * 52 */ 53 #ifdef DEBUG 54 #define stk1160_dbg(fmt, args...) \ 55 printk(KERN_DEBUG "stk1160: " fmt, ## args) 56 #else 57 #define stk1160_dbg(fmt, args...) 58 #endif 59 60 #define stk1160_info(fmt, args...) \ 61 pr_info("stk1160: " fmt, ## args) 62 63 #define stk1160_warn(fmt, args...) \ 64 pr_warn("stk1160: " fmt, ## args) 65 66 #define stk1160_err(fmt, args...) \ 67 pr_err("stk1160: " fmt, ## args) 68 69 /* Buffer for one video frame */ 70 struct stk1160_buffer { 71 /* common v4l buffer stuff -- must be first */ 72 struct vb2_v4l2_buffer vb; 73 struct list_head list; 74 75 void *mem; 76 unsigned int length; /* buffer length */ 77 unsigned int bytesused; /* bytes written */ 78 int odd; /* current oddity */ 79 80 /* 81 * Since we interlace two fields per frame, 82 * this is different from bytesused. 83 */ 84 unsigned int pos; /* current pos inside buffer */ 85 }; 86 87 struct stk1160_isoc_ctl { 88 /* max packet size of isoc transaction */ 89 int max_pkt_size; 90 91 /* number of allocated urbs */ 92 int num_bufs; 93 94 /* urb for isoc transfers */ 95 struct urb **urb; 96 97 /* transfer buffers for isoc transfer */ 98 char **transfer_buffer; 99 100 /* current buffer */ 101 struct stk1160_buffer *buf; 102 }; 103 104 struct stk1160_fmt { 105 u32 fourcc; /* v4l2 format id */ 106 int depth; 107 }; 108 109 struct stk1160 { 110 struct v4l2_device v4l2_dev; 111 struct video_device vdev; 112 struct v4l2_ctrl_handler ctrl_handler; 113 114 struct device *dev; 115 struct usb_device *udev; 116 117 /* saa7115 subdev */ 118 struct v4l2_subdev *sd_saa7115; 119 120 /* isoc control struct */ 121 struct list_head avail_bufs; 122 123 /* video capture */ 124 struct vb2_queue vb_vidq; 125 126 /* max packet size of isoc transaction */ 127 int max_pkt_size; 128 /* array of wMaxPacketSize */ 129 unsigned int *alt_max_pkt_size; 130 /* alternate */ 131 int alt; 132 /* Number of alternative settings */ 133 int num_alt; 134 135 struct stk1160_isoc_ctl isoc_ctl; 136 137 /* frame properties */ 138 int width; /* current frame width */ 139 int height; /* current frame height */ 140 unsigned int ctl_input; /* selected input */ 141 v4l2_std_id norm; /* current norm */ 142 struct stk1160_fmt *fmt; /* selected format */ 143 144 unsigned int sequence; 145 146 /* i2c i/o */ 147 struct i2c_adapter i2c_adap; 148 struct i2c_client i2c_client; 149 150 struct mutex v4l_lock; 151 struct mutex vb_queue_lock; 152 spinlock_t buf_lock; 153 154 struct file *fh_owner; /* filehandle ownership */ 155 156 /* EXPERIMENTAL */ 157 struct snd_card *snd_card; 158 }; 159 160 struct regval { 161 u16 reg; 162 u16 val; 163 }; 164 165 /* Provided by stk1160-v4l.c */ 166 int stk1160_vb2_setup(struct stk1160 *dev); 167 int stk1160_video_register(struct stk1160 *dev); 168 void stk1160_video_unregister(struct stk1160 *dev); 169 void stk1160_clear_queue(struct stk1160 *dev, enum vb2_buffer_state vb2_state); 170 171 /* Provided by stk1160-video.c */ 172 int stk1160_alloc_isoc(struct stk1160 *dev); 173 void stk1160_free_isoc(struct stk1160 *dev); 174 void stk1160_cancel_isoc(struct stk1160 *dev); 175 void stk1160_uninit_isoc(struct stk1160 *dev); 176 177 /* Provided by stk1160-i2c.c */ 178 int stk1160_i2c_register(struct stk1160 *dev); 179 int stk1160_i2c_unregister(struct stk1160 *dev); 180 181 /* Provided by stk1160-core.c */ 182 int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value); 183 int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value); 184 int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg, 185 char *buf, int len); 186 int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg, 187 char *buf, int len); 188 void stk1160_select_input(struct stk1160 *dev); 189 190 /* Provided by stk1160-ac97.c */ 191 void stk1160_ac97_setup(struct stk1160 *dev); 192