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0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  *  Driver for the Auvitek AU0828 USB bridge
0004  *
0005  *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
0006  */
0007 
0008 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0009 
0010 #include <linux/bitops.h>
0011 #include <linux/usb.h>
0012 #include <linux/i2c.h>
0013 #include <linux/i2c-algo-bit.h>
0014 #include <media/tveeprom.h>
0015 
0016 /* Analog */
0017 #include <linux/videodev2.h>
0018 #include <media/videobuf2-v4l2.h>
0019 #include <media/videobuf2-vmalloc.h>
0020 #include <media/v4l2-device.h>
0021 #include <media/v4l2-ctrls.h>
0022 #include <media/v4l2-fh.h>
0023 #include <media/media-device.h>
0024 #include <media/media-dev-allocator.h>
0025 
0026 /* DVB */
0027 #include <media/demux.h>
0028 #include <media/dmxdev.h>
0029 #include <media/dvb_demux.h>
0030 #include <media/dvb_frontend.h>
0031 #include <media/dvb_net.h>
0032 #include <media/dvbdev.h>
0033 
0034 #include "au0828-reg.h"
0035 #include "au0828-cards.h"
0036 
0037 #define URB_COUNT   16
0038 #define URB_BUFSIZE (0xe522)
0039 
0040 /* Analog constants */
0041 #define NTSC_STD_W      720
0042 #define NTSC_STD_H      480
0043 
0044 #define AU0828_INTERLACED_DEFAULT       1
0045 
0046 /* Definition for AU0828 USB transfer */
0047 #define AU0828_MAX_ISO_BUFS    12  /* maybe resize this value in the future */
0048 #define AU0828_ISO_PACKETS_PER_URB      128
0049 
0050 #define AU0828_MIN_BUF 4
0051 #define AU0828_DEF_BUF 8
0052 
0053 #define AU0828_MAX_INPUT        4
0054 
0055 /* au0828 resource types (used for res_get/res_lock etc */
0056 #define AU0828_RESOURCE_VIDEO 0x01
0057 #define AU0828_RESOURCE_VBI   0x02
0058 
0059 enum au0828_itype {
0060     AU0828_VMUX_UNDEFINED = 0,
0061     AU0828_VMUX_COMPOSITE,
0062     AU0828_VMUX_SVIDEO,
0063     AU0828_VMUX_CABLE,
0064     AU0828_VMUX_TELEVISION,
0065     AU0828_VMUX_DVB,
0066 };
0067 
0068 struct au0828_input {
0069     enum au0828_itype type;
0070     unsigned int vmux;
0071     unsigned int amux;
0072     void (*audio_setup) (void *priv, int enable);
0073 };
0074 
0075 struct au0828_board {
0076     char *name;
0077     unsigned int tuner_type;
0078     unsigned char tuner_addr;
0079     unsigned char i2c_clk_divider;
0080     unsigned char has_ir_i2c:1;
0081     unsigned char has_analog:1;
0082     struct au0828_input input[AU0828_MAX_INPUT];
0083 };
0084 
0085 struct au0828_dvb {
0086     struct mutex lock;
0087     struct dvb_adapter adapter;
0088     struct dvb_frontend *frontend;
0089     struct dvb_demux demux;
0090     struct dmxdev dmxdev;
0091     struct dmx_frontend fe_hw;
0092     struct dmx_frontend fe_mem;
0093     struct dvb_net net;
0094     int feeding;
0095     int start_count;
0096     int stop_count;
0097 
0098     int (*set_frontend)(struct dvb_frontend *fe);
0099 };
0100 
0101 enum au0828_stream_state {
0102     STREAM_OFF,
0103     STREAM_INTERRUPT,
0104     STREAM_ON
0105 };
0106 
0107 #define AUVI_INPUT(nr) (dev->board.input[nr])
0108 
0109 /* device state */
0110 enum au0828_dev_state {
0111     DEV_INITIALIZED = 0,
0112     DEV_DISCONNECTED = 1,
0113     DEV_MISCONFIGURED = 2
0114 };
0115 
0116 struct au0828_dev;
0117 
0118 struct au0828_usb_isoc_ctl {
0119         /* max packet size of isoc transaction */
0120     int             max_pkt_size;
0121 
0122         /* number of allocated urbs */
0123     int             num_bufs;
0124 
0125         /* urb for isoc transfers */
0126     struct urb          **urb;
0127 
0128         /* transfer buffers for isoc transfer */
0129     char                **transfer_buffer;
0130 
0131         /* Last buffer command and region */
0132     u8              cmd;
0133     int             pos, size, pktsize;
0134 
0135         /* Last field: ODD or EVEN? */
0136     int             field;
0137 
0138         /* Stores incomplete commands */
0139     u32             tmp_buf;
0140     int             tmp_buf_len;
0141 
0142         /* Stores already requested buffers */
0143     struct au0828_buffer        *buf;
0144     struct au0828_buffer        *vbi_buf;
0145 
0146         /* Stores the number of received fields */
0147     int             nfields;
0148 
0149         /* isoc urb callback */
0150     int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb);
0151 
0152 };
0153 
0154 /* buffer for one video frame */
0155 struct au0828_buffer {
0156     /* common v4l buffer stuff -- must be first */
0157     struct vb2_v4l2_buffer vb;
0158     struct list_head list;
0159 
0160     void *mem;
0161     unsigned long length;
0162     int top_field;
0163     /* pointer to vmalloc memory address in vb */
0164     char *vb_buf;
0165 };
0166 
0167 struct au0828_dmaqueue {
0168     struct list_head       active;
0169     /* Counters to control buffer fill */
0170     int                    pos;
0171 };
0172 
0173 struct au0828_dev {
0174     struct mutex mutex;
0175     struct usb_device   *usbdev;
0176     int         boardnr;
0177     struct au0828_board board;
0178     u8          ctrlmsg[64];
0179 
0180     /* I2C */
0181     struct i2c_adapter      i2c_adap;
0182     struct i2c_algorithm        i2c_algo;
0183     struct i2c_client       i2c_client;
0184     u32             i2c_rc;
0185 
0186     /* Digital */
0187     struct au0828_dvb       dvb;
0188     struct work_struct              restart_streaming;
0189     struct timer_list               bulk_timeout;
0190     int                             bulk_timeout_running;
0191 
0192 #ifdef CONFIG_VIDEO_AU0828_V4L2
0193     /* Analog */
0194     struct v4l2_device v4l2_dev;
0195     struct v4l2_ctrl_handler v4l2_ctrl_hdl;
0196 #endif
0197 #ifdef CONFIG_VIDEO_AU0828_RC
0198     struct au0828_rc *ir;
0199 #endif
0200 
0201     struct video_device vdev;
0202     struct video_device vbi_dev;
0203 
0204     /* Videobuf2 */
0205     struct vb2_queue vb_vidq;
0206     struct vb2_queue vb_vbiq;
0207     struct mutex vb_queue_lock;
0208     struct mutex vb_vbi_queue_lock;
0209 
0210     unsigned int frame_count;
0211     unsigned int vbi_frame_count;
0212 
0213     struct timer_list vid_timeout;
0214     int vid_timeout_running;
0215     struct timer_list vbi_timeout;
0216     int vbi_timeout_running;
0217 
0218     int users;
0219     int streaming_users;
0220 
0221     int width;
0222     int height;
0223     int vbi_width;
0224     int vbi_height;
0225     u32 vbi_read;
0226     v4l2_std_id std;
0227     u32 field_size;
0228     u32 frame_size;
0229     u32 bytesperline;
0230     int type;
0231     u8 ctrl_ainput;
0232     __u8 isoc_in_endpointaddr;
0233     u8 isoc_init_ok;
0234     int greenscreen_detected;
0235     int ctrl_freq;
0236     int input_type;
0237     int std_set_in_tuner_core;
0238     unsigned int ctrl_input;
0239     long unsigned int dev_state; /* defined at enum au0828_dev_state */;
0240     enum au0828_stream_state stream_state;
0241     wait_queue_head_t open;
0242 
0243     struct mutex lock;
0244 
0245     /* Isoc control struct */
0246     struct au0828_dmaqueue vidq;
0247     struct au0828_dmaqueue vbiq;
0248     struct au0828_usb_isoc_ctl isoc_ctl;
0249     spinlock_t slock;
0250 
0251     /* usb transfer */
0252     int alt;        /* alternate */
0253     int max_pkt_size;   /* max packet size of isoc transaction */
0254     int num_alt;        /* Number of alternative settings */
0255     unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
0256     struct urb *urb[AU0828_MAX_ISO_BUFS];   /* urb for isoc transfers */
0257     char *transfer_buffer[AU0828_MAX_ISO_BUFS];/* transfer buffers for isoc
0258                            transfer */
0259 
0260     /* DVB USB / URB Related */
0261     bool        urb_streaming, need_urb_start;
0262     struct urb  *urbs[URB_COUNT];
0263 
0264     /* Preallocated transfer digital transfer buffers */
0265 
0266     char *dig_transfer_buffer[URB_COUNT];
0267 
0268 #ifdef CONFIG_MEDIA_CONTROLLER
0269     struct media_device *media_dev;
0270     struct media_pad video_pad, vbi_pad;
0271     struct media_entity *decoder;
0272     struct media_entity input_ent[AU0828_MAX_INPUT];
0273     struct media_pad input_pad[AU0828_MAX_INPUT];
0274     struct media_entity_notify entity_notify;
0275     struct media_entity *tuner;
0276     struct media_link *active_link;
0277     struct media_entity *active_source;
0278     struct media_entity *active_sink;
0279     struct media_entity *active_link_owner;
0280     struct media_entity *active_link_user;
0281     struct media_pipeline *active_link_user_pipe;
0282     bool active_link_shared;
0283 #endif
0284 };
0285 
0286 
0287 /* ----------------------------------------------------------- */
0288 #define au0828_read(dev, reg) au0828_readreg(dev, reg)
0289 #define au0828_write(dev, reg, value) au0828_writereg(dev, reg, value)
0290 #define au0828_andor(dev, reg, mask, value)             \
0291      au0828_writereg(dev, reg,                  \
0292     (au0828_readreg(dev, reg) & ~(mask)) | ((value) & (mask)))
0293 
0294 #define au0828_set(dev, reg, bit) au0828_andor(dev, (reg), (bit), (bit))
0295 #define au0828_clear(dev, reg, bit) au0828_andor(dev, (reg), (bit), 0)
0296 
0297 /* ----------------------------------------------------------- */
0298 /* au0828-core.c */
0299 extern u32 au0828_read(struct au0828_dev *dev, u16 reg);
0300 extern u32 au0828_write(struct au0828_dev *dev, u16 reg, u32 val);
0301 extern void au0828_usb_release(struct au0828_dev *dev);
0302 extern int au0828_debug;
0303 
0304 /* ----------------------------------------------------------- */
0305 /* au0828-cards.c */
0306 extern struct au0828_board au0828_boards[];
0307 extern struct usb_device_id au0828_usb_id_table[];
0308 extern void au0828_gpio_setup(struct au0828_dev *dev);
0309 extern int au0828_tuner_callback(void *priv, int component,
0310                  int command, int arg);
0311 extern void au0828_card_setup(struct au0828_dev *dev);
0312 
0313 /* ----------------------------------------------------------- */
0314 /* au0828-i2c.c */
0315 extern int au0828_i2c_register(struct au0828_dev *dev);
0316 extern int au0828_i2c_unregister(struct au0828_dev *dev);
0317 
0318 /* ----------------------------------------------------------- */
0319 /* au0828-video.c */
0320 extern int au0828_start_analog_streaming(struct vb2_queue *vq,
0321                         unsigned int count);
0322 extern void au0828_stop_vbi_streaming(struct vb2_queue *vq);
0323 #ifdef CONFIG_VIDEO_AU0828_V4L2
0324 extern int au0828_v4l2_device_register(struct usb_interface *interface,
0325                       struct au0828_dev *dev);
0326 
0327 extern int au0828_analog_register(struct au0828_dev *dev,
0328                struct usb_interface *interface);
0329 extern int au0828_analog_unregister(struct au0828_dev *dev);
0330 extern void au0828_usb_v4l2_media_release(struct au0828_dev *dev);
0331 extern void au0828_v4l2_suspend(struct au0828_dev *dev);
0332 extern void au0828_v4l2_resume(struct au0828_dev *dev);
0333 #else
0334 static inline int au0828_v4l2_device_register(struct usb_interface *interface,
0335                           struct au0828_dev *dev)
0336 { return 0; };
0337 static inline int au0828_analog_register(struct au0828_dev *dev,
0338                      struct usb_interface *interface)
0339 { return 0; };
0340 static inline int au0828_analog_unregister(struct au0828_dev *dev)
0341 { return 0; };
0342 static inline void au0828_usb_v4l2_media_release(struct au0828_dev *dev) { };
0343 static inline void au0828_v4l2_suspend(struct au0828_dev *dev) { };
0344 static inline void au0828_v4l2_resume(struct au0828_dev *dev) { };
0345 #endif
0346 
0347 /* ----------------------------------------------------------- */
0348 /* au0828-dvb.c */
0349 extern int au0828_dvb_register(struct au0828_dev *dev);
0350 extern void au0828_dvb_unregister(struct au0828_dev *dev);
0351 void au0828_dvb_suspend(struct au0828_dev *dev);
0352 void au0828_dvb_resume(struct au0828_dev *dev);
0353 
0354 /* au0828-vbi.c */
0355 extern const struct vb2_ops au0828_vbi_qops;
0356 
0357 #define dprintk(level, fmt, arg...)\
0358     do { if (au0828_debug & level)\
0359         printk(KERN_DEBUG pr_fmt(fmt), ## arg);\
0360     } while (0)
0361 
0362 /* au0828-input.c */
0363 #ifdef CONFIG_VIDEO_AU0828_RC
0364 extern int au0828_rc_register(struct au0828_dev *dev);
0365 extern void au0828_rc_unregister(struct au0828_dev *dev);
0366 extern int au0828_rc_suspend(struct au0828_dev *dev);
0367 extern int au0828_rc_resume(struct au0828_dev *dev);
0368 #else
0369 static inline int au0828_rc_register(struct au0828_dev *dev) { return 0; }
0370 static inline void au0828_rc_unregister(struct au0828_dev *dev) { }
0371 static inline int au0828_rc_suspend(struct au0828_dev *dev) { return 0; }
0372 static inline int au0828_rc_resume(struct au0828_dev *dev) { return 0; }
0373 #endif
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