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 } 203