drivers/media/usb/stk1160/stk1160.h

   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 #include <linux/usb.h>
  20 #include <linux/usb/hcd.h>
  21
  22 #define STK1160_VERSION         "0.9.5"
  23 #define STK1160_VERSION_NUM     0x000905
  24
  25 /* Decide on number of packets for each buffer */
  26 #define STK1160_NUM_PACKETS 64
  27
  28 /* Number of buffers for isoc transfers */
  29 #define STK1160_NUM_BUFS 16
  30 #define STK1160_MIN_BUFS 1
  31
  32 /* TODO: This endpoint address should be retrieved */
  33 #define STK1160_EP_VIDEO 0x82
  34 #define STK1160_EP_AUDIO 0x81
  35
  36 /* Max and min video buffers */
  37 #define STK1160_MIN_VIDEO_BUFFERS 8
  38 #define STK1160_MAX_VIDEO_BUFFERS 32
  39
  40 #define STK1160_MIN_PKT_SIZE 3072
  41
  42 #define STK1160_MAX_INPUT 4
  43 #define STK1160_SVIDEO_INPUT 4
  44
  45 #define STK1160_AC97_TIMEOUT 50
  46
  47 #define STK1160_I2C_TIMEOUT 100
  48
  49 /* TODO: Print helpers
  50  * I could use dev_xxx, pr_xxx, v4l2_xxx or printk.
  51  * However, there isn't a solid consensus on which
  52  * new drivers should use.
  53  *
  54  */
  55 #ifdef DEBUG
  56 #define stk1160_dbg(fmt, args...) \
  57         printk(KERN_DEBUG "stk1160: " fmt,  ## args)
  58 #else
  59 #define stk1160_dbg(fmt, args...)
  60 #endif
  61
  62 #define stk1160_info(fmt, args...) \
  63         pr_info("stk1160: " fmt, ## args)
  64
  65 #define stk1160_warn(fmt, args...) \
  66         pr_warn("stk1160: " fmt, ## args)
  67
  68 #define stk1160_err(fmt, args...) \
  69         pr_err("stk1160: " fmt, ## args)
  70
  71 /* Buffer for one video frame */
  72 struct stk1160_buffer {
  73         /* common v4l buffer stuff -- must be first */
  74         struct vb2_v4l2_buffer vb;
  75         struct list_head list;
  76
  77         void *mem;
  78         unsigned int length;            /* buffer length */
  79         unsigned int bytesused;         /* bytes written */
  80         int odd;                        /* current oddity */
  81
  82         /*
  83          * Since we interlace two fields per frame,
  84          * this is different from bytesused.
  85          */
  86         unsigned int pos;               /* current pos inside buffer */
  87 };
  88
  89 struct stk1160_urb {
  90         struct urb *urb;
  91         char *transfer_buffer;
  92         struct sg_table *sgt;
  93         struct stk1160 *dev;
  94         dma_addr_t dma;
  95 };
  96
  97 struct stk1160_isoc_ctl {
  98         /* max packet size of isoc transaction */
  99         int max_pkt_size;
 100
 101         /* number of allocated urbs */
 102         int num_bufs;
 103
 104         struct stk1160_urb urb_ctl[STK1160_NUM_BUFS];
 105
 106         /* current buffer */
 107         struct stk1160_buffer *buf;
 108 };
 109
 110 struct stk1160_fmt {
 111         u32   fourcc;          /* v4l2 format id */
 112         int   depth;
 113 };
 114
 115 struct stk1160 {
 116         struct v4l2_device v4l2_dev;
 117         struct video_device vdev;
 118         struct v4l2_ctrl_handler ctrl_handler;
 119
 120         struct device *dev;
 121         struct usb_device *udev;
 122
 123         /* saa7115 subdev */
 124         struct v4l2_subdev *sd_saa7115;
 125
 126         /* isoc control struct */
 127         struct list_head avail_bufs;
 128
 129         /* video capture */
 130         struct vb2_queue vb_vidq;
 131
 132         /* max packet size of isoc transaction */
 133         int max_pkt_size;
 134         /* array of wMaxPacketSize */
 135         unsigned int *alt_max_pkt_size;
 136         /* alternate */
 137         int alt;
 138         /* Number of alternative settings */
 139         int num_alt;
 140
 141         struct stk1160_isoc_ctl isoc_ctl;
 142
 143         /* frame properties */
 144         int width;                /* current frame width */
 145         int height;               /* current frame height */
 146         unsigned int ctl_input;   /* selected input */
 147         v4l2_std_id norm;         /* current norm */
 148         struct stk1160_fmt *fmt;  /* selected format */
 149
 150         unsigned int sequence;
 151
 152         /* i2c i/o */
 153         struct i2c_adapter i2c_adap;
 154         struct i2c_client i2c_client;
 155
 156         struct mutex v4l_lock;
 157         struct mutex vb_queue_lock;
 158         spinlock_t buf_lock;
 159
 160         struct file *fh_owner;  /* filehandle ownership */
 161
 162         /* EXPERIMENTAL */
 163         struct snd_card *snd_card;
 164 };
 165
 166 struct regval {
 167         u16 reg;
 168         u16 val;
 169 };
 170
 171 /* Provided by stk1160-v4l.c */
 172 int stk1160_vb2_setup(struct stk1160 *dev);
 173 int stk1160_video_register(struct stk1160 *dev);
 174 void stk1160_video_unregister(struct stk1160 *dev);
 175 void stk1160_clear_queue(struct stk1160 *dev, enum vb2_buffer_state vb2_state);
 176
 177 /* Provided by stk1160-video.c */
 178 int stk1160_alloc_isoc(struct stk1160 *dev);
 179 void stk1160_free_isoc(struct stk1160 *dev);
 180 void stk1160_cancel_isoc(struct stk1160 *dev);
 181 void stk1160_uninit_isoc(struct stk1160 *dev);
 182
 183 /* Provided by stk1160-i2c.c */
 184 int stk1160_i2c_register(struct stk1160 *dev);
 185 int stk1160_i2c_unregister(struct stk1160 *dev);
 186
 187 /* Provided by stk1160-core.c */
 188 int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value);
 189 int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value);
 190 int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg,
 191                 char *buf, int len);
 192 int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg,
 193                 char *buf, int len);
 194 void stk1160_select_input(struct stk1160 *dev);
 195
 196 /* Provided by stk1160-ac97.c */
 197 void stk1160_ac97_setup(struct stk1160 *dev);
 198
 199 static inline struct device *stk1160_get_dmadev(struct stk1160 *dev)
 200 {
 201         return bus_to_hcd(dev->udev->bus)->self.sysdev;
 202 }