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_urb { 88 struct urb *urb; 89 char *transfer_buffer; 90 struct sg_table *sgt; 91 struct stk1160 *dev; 92 dma_addr_t dma; 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 struct stk1160_urb urb_ctl[STK1160_NUM_BUFS]; 103 104 /* current buffer */ 105 struct stk1160_buffer *buf; 106 }; 107 108 struct stk1160_fmt { 109 u32 fourcc; /* v4l2 format id */ 110 int depth; 111 }; 112 113 struct stk1160 { 114 struct v4l2_device v4l2_dev; 115 struct video_device vdev; 116 struct v4l2_ctrl_handler ctrl_handler; 117 118 struct device *dev; 119 struct usb_device *udev; 120 121 /* saa7115 subdev */ 122 struct v4l2_subdev *sd_saa7115; 123 124 /* isoc control struct */ 125 struct list_head avail_bufs; 126 127 /* video capture */ 128 struct vb2_queue vb_vidq; 129 130 /* max packet size of isoc transaction */ 131 int max_pkt_size; 132 /* array of wMaxPacketSize */ 133 unsigned int *alt_max_pkt_size; 134 /* alternate */ 135 int alt; 136 /* Number of alternative settings */ 137 int num_alt; 138 139 struct stk1160_isoc_ctl isoc_ctl; 140 141 /* frame properties */ 142 int width; /* current frame width */ 143 int height; /* current frame height */ 144 unsigned int ctl_input; /* selected input */ 145 v4l2_std_id norm; /* current norm */ 146 struct stk1160_fmt *fmt; /* selected format */ 147 148 unsigned int sequence; 149 150 /* i2c i/o */ 151 struct i2c_adapter i2c_adap; 152 struct i2c_client i2c_client; 153 154 struct mutex v4l_lock; 155 struct mutex vb_queue_lock; 156 spinlock_t buf_lock; 157 158 struct file *fh_owner; /* filehandle ownership */ 159 160 /* EXPERIMENTAL */ 161 struct snd_card *snd_card; 162 }; 163 164 struct regval { 165 u16 reg; 166 u16 val; 167 }; 168 169 /* Provided by stk1160-v4l.c */ 170 int stk1160_vb2_setup(struct stk1160 *dev); 171 int stk1160_video_register(struct stk1160 *dev); 172 void stk1160_video_unregister(struct stk1160 *dev); 173 void stk1160_clear_queue(struct stk1160 *dev, enum vb2_buffer_state vb2_state); 174 175 /* Provided by stk1160-video.c */ 176 int stk1160_alloc_isoc(struct stk1160 *dev); 177 void stk1160_free_isoc(struct stk1160 *dev); 178 void stk1160_cancel_isoc(struct stk1160 *dev); 179 void stk1160_uninit_isoc(struct stk1160 *dev); 180 181 /* Provided by stk1160-i2c.c */ 182 int stk1160_i2c_register(struct stk1160 *dev); 183 int stk1160_i2c_unregister(struct stk1160 *dev); 184 185 /* Provided by stk1160-core.c */ 186 int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value); 187 int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value); 188 int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg, 189 char *buf, int len); 190 int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg, 191 char *buf, int len); 192 void stk1160_select_input(struct stk1160 *dev); 193 194 /* Provided by stk1160-ac97.c */ 195 void stk1160_ac97_setup(struct stk1160 *dev); 196