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1  /* SPDX-License-Identifier: GPL-2.0-or-later */
2  /*
3   *  Driver for the NXP SAA7164 PCIe bridge
4   *
5   *  Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
6   */
7  
8  /*
9  	Driver architecture
10  	*******************
11  
12  	saa7164_core.c/buffer.c/cards.c/i2c.c/dvb.c
13  		|	: Standard Linux driver framework for creating
14  		|	: exposing and managing interfaces to the rest
15  		|	: of the kernel or userland. Also uses _fw.c to load
16  		|	: firmware direct into the PCIe bus, bypassing layers.
17  		V
18  	saa7164_api..()	: Translate kernel specific functions/features
19  		|	: into command buffers.
20  		V
21  	saa7164_cmd..()	: Manages the flow of command packets on/off,
22  		|	: the bus. Deal with bus errors, timeouts etc.
23  		V
24  	saa7164_bus..() : Manage a read/write memory ring buffer in the
25  		|	: PCIe Address space.
26  		|
27  		|		saa7164_fw...()	: Load any frimware
28  		|			|	: direct into the device
29  		V			V
30  	<- ----------------- PCIe address space -------------------- ->
31  */
32  
33  #include <linux/pci.h>
34  #include <linux/i2c.h>
35  #include <linux/kdev_t.h>
36  #include <linux/mutex.h>
37  #include <linux/crc32.h>
38  #include <linux/kthread.h>
39  #include <linux/freezer.h>
40  
41  #include <media/tuner.h>
42  #include <media/tveeprom.h>
43  #include <media/dvb_demux.h>
44  #include <media/dvb_frontend.h>
45  #include <media/dvb_net.h>
46  #include <media/dvbdev.h>
47  #include <media/dmxdev.h>
48  #include <media/v4l2-common.h>
49  #include <media/v4l2-ioctl.h>
50  #include <media/v4l2-device.h>
51  #include <media/v4l2-ctrls.h>
52  #include <media/v4l2-event.h>
53  
54  #include "saa7164-reg.h"
55  #include "saa7164-types.h"
56  
57  #define SAA7164_MAXBOARDS 8
58  
59  #define UNSET (-1U)
60  #define SAA7164_BOARD_NOAUTO			UNSET
61  #define SAA7164_BOARD_UNKNOWN			0
62  #define SAA7164_BOARD_UNKNOWN_REV2		1
63  #define SAA7164_BOARD_UNKNOWN_REV3		2
64  #define SAA7164_BOARD_HAUPPAUGE_HVR2250		3
65  #define SAA7164_BOARD_HAUPPAUGE_HVR2200		4
66  #define SAA7164_BOARD_HAUPPAUGE_HVR2200_2	5
67  #define SAA7164_BOARD_HAUPPAUGE_HVR2200_3	6
68  #define SAA7164_BOARD_HAUPPAUGE_HVR2250_2	7
69  #define SAA7164_BOARD_HAUPPAUGE_HVR2250_3	8
70  #define SAA7164_BOARD_HAUPPAUGE_HVR2200_4	9
71  #define SAA7164_BOARD_HAUPPAUGE_HVR2200_5	10
72  #define SAA7164_BOARD_HAUPPAUGE_HVR2255proto	11
73  #define SAA7164_BOARD_HAUPPAUGE_HVR2255		12
74  #define SAA7164_BOARD_HAUPPAUGE_HVR2205		13
75  
76  #define SAA7164_MAX_UNITS		8
77  #define SAA7164_TS_NUMBER_OF_LINES	312
78  #define SAA7164_PS_NUMBER_OF_LINES	256
79  #define SAA7164_PT_ENTRIES		16 /* (312 * 188) / 4096 */
80  #define SAA7164_MAX_ENCODER_BUFFERS	64 /* max 5secs of latency at 6Mbps */
81  #define SAA7164_MAX_VBI_BUFFERS		64
82  
83  /* Port related defines */
84  #define SAA7164_PORT_TS1	(0)
85  #define SAA7164_PORT_TS2	(SAA7164_PORT_TS1 + 1)
86  #define SAA7164_PORT_ENC1	(SAA7164_PORT_TS2 + 1)
87  #define SAA7164_PORT_ENC2	(SAA7164_PORT_ENC1 + 1)
88  #define SAA7164_PORT_VBI1	(SAA7164_PORT_ENC2 + 1)
89  #define SAA7164_PORT_VBI2	(SAA7164_PORT_VBI1 + 1)
90  #define SAA7164_MAX_PORTS	(SAA7164_PORT_VBI2 + 1)
91  
92  #define DBGLVL_FW    4
93  #define DBGLVL_DVB   8
94  #define DBGLVL_I2C  16
95  #define DBGLVL_API  32
96  #define DBGLVL_CMD  64
97  #define DBGLVL_BUS 128
98  #define DBGLVL_IRQ 256
99  #define DBGLVL_BUF 512
100  #define DBGLVL_ENC 1024
101  #define DBGLVL_VBI 2048
102  #define DBGLVL_THR 4096
103  #define DBGLVL_CPU 8192
104  
105  #define SAA7164_NORMS \
106  	(V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_JP)
107  
108  /* TV frequency range copied from tuner-core.c */
109  #define SAA7164_TV_MIN_FREQ (44U * 16U)
110  #define SAA7164_TV_MAX_FREQ (958U * 16U)
111  
112  enum port_t {
113  	SAA7164_MPEG_UNDEFINED = 0,
114  	SAA7164_MPEG_DVB,
115  	SAA7164_MPEG_ENCODER,
116  	SAA7164_MPEG_VBI,
117  };
118  
119  enum saa7164_i2c_bus_nr {
120  	SAA7164_I2C_BUS_0 = 0,
121  	SAA7164_I2C_BUS_1,
122  	SAA7164_I2C_BUS_2,
123  };
124  
125  enum saa7164_buffer_flags {
126  	SAA7164_BUFFER_UNDEFINED = 0,
127  	SAA7164_BUFFER_FREE,
128  	SAA7164_BUFFER_BUSY,
129  	SAA7164_BUFFER_FULL
130  };
131  
132  enum saa7164_unit_type {
133  	SAA7164_UNIT_UNDEFINED = 0,
134  	SAA7164_UNIT_DIGITAL_DEMODULATOR,
135  	SAA7164_UNIT_ANALOG_DEMODULATOR,
136  	SAA7164_UNIT_TUNER,
137  	SAA7164_UNIT_EEPROM,
138  	SAA7164_UNIT_ZILOG_IRBLASTER,
139  	SAA7164_UNIT_ENCODER,
140  };
141  
142  /* The PCIe bridge doesn't grant direct access to i2c.
143   * Instead, you address i2c devices using a uniqely
144   * allocated 'unitid' value via a messaging API. This
145   * is a problem. The kernel and existing demod/tuner
146   * drivers expect to talk 'i2c', so we have to maintain
147   * a translation layer, and a series of functions to
148   * convert i2c bus + device address into a unit id.
149   */
150  struct saa7164_unit {
151  	enum saa7164_unit_type type;
152  	u8	id;
153  	char	*name;
154  	enum saa7164_i2c_bus_nr i2c_bus_nr;
155  	u8	i2c_bus_addr;
156  	u8	i2c_reg_len;
157  };
158  
159  struct saa7164_board {
160  	char	*name;
161  	enum port_t porta, portb, portc,
162  		portd, porte, portf;
163  	enum {
164  		SAA7164_CHIP_UNDEFINED = 0,
165  		SAA7164_CHIP_REV2,
166  		SAA7164_CHIP_REV3,
167  	} chiprev;
168  	struct	saa7164_unit unit[SAA7164_MAX_UNITS];
169  };
170  
171  struct saa7164_subid {
172  	u16     subvendor;
173  	u16     subdevice;
174  	u32     card;
175  };
176  
177  struct saa7164_encoder_fh {
178  	struct v4l2_fh fh;
179  	struct saa7164_port *port;
180  	atomic_t v4l_reading;
181  };
182  
183  struct saa7164_vbi_fh {
184  	struct v4l2_fh fh;
185  	struct saa7164_port *port;
186  	atomic_t v4l_reading;
187  };
188  
189  struct saa7164_histogram_bucket {
190  	u32 val;
191  	u32 count;
192  	u64 update_time;
193  };
194  
195  struct saa7164_histogram {
196  	char name[32];
197  	struct saa7164_histogram_bucket counter1[64];
198  };
199  
200  struct saa7164_user_buffer {
201  	struct list_head list;
202  
203  	/* Attributes */
204  	u8  *data;
205  	u32 pos;
206  	u32 actual_size;
207  
208  	u32 crc;
209  };
210  
211  struct saa7164_fw_status {
212  
213  	/* RISC Core details */
214  	u32	status;
215  	u32	mode;
216  	u32	spec;
217  	u32	inst;
218  	u32	cpuload;
219  	u32	remainheap;
220  
221  	/* Firmware version */
222  	u32	version;
223  	u32	major;
224  	u32	sub;
225  	u32	rel;
226  	u32	buildnr;
227  };
228  
229  struct saa7164_dvb {
230  	struct mutex lock;
231  	struct dvb_adapter adapter;
232  	struct dvb_frontend *frontend;
233  	struct dvb_demux demux;
234  	struct dmxdev dmxdev;
235  	struct dmx_frontend fe_hw;
236  	struct dmx_frontend fe_mem;
237  	struct dvb_net net;
238  	int feeding;
239  };
240  
241  struct saa7164_i2c {
242  	struct saa7164_dev		*dev;
243  
244  	enum saa7164_i2c_bus_nr		nr;
245  
246  	/* I2C I/O */
247  	struct i2c_adapter		i2c_adap;
248  	struct i2c_client		i2c_client;
249  	u32				i2c_rc;
250  };
251  
252  struct saa7164_tvnorm {
253  	char		*name;
254  	v4l2_std_id	id;
255  };
256  
257  struct saa7164_encoder_params {
258  	struct saa7164_tvnorm encodernorm;
259  	u32 height;
260  	u32 width;
261  	u32 is_50hz;
262  	u32 bitrate; /* bps */
263  	u32 bitrate_peak; /* bps */
264  	u32 bitrate_mode;
265  	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */
266  
267  	u32 audio_sampling_freq;
268  	u32 ctl_mute;
269  	u32 ctl_aspect;
270  	u32 refdist;
271  	u32 gop_size;
272  };
273  
274  struct saa7164_vbi_params {
275  	struct saa7164_tvnorm encodernorm;
276  	u32 height;
277  	u32 width;
278  	u32 is_50hz;
279  	u32 bitrate; /* bps */
280  	u32 bitrate_peak; /* bps */
281  	u32 bitrate_mode;
282  	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */
283  
284  	u32 audio_sampling_freq;
285  	u32 ctl_mute;
286  	u32 ctl_aspect;
287  	u32 refdist;
288  	u32 gop_size;
289  };
290  
291  struct saa7164_port;
292  
293  struct saa7164_buffer {
294  	struct list_head list;
295  
296  	/* Note of which h/w buffer list index position we occupy */
297  	int idx;
298  
299  	struct saa7164_port *port;
300  
301  	/* Hardware Specific */
302  	/* PCI Memory allocations */
303  	enum saa7164_buffer_flags flags; /* Free, Busy, Full */
304  
305  	/* A block of page align PCI memory */
306  	u32 pci_size;	/* PCI allocation size in bytes */
307  	u64 *cpu;	/* Virtual address */
308  	dma_addr_t dma;	/* Physical address */
309  	u32 crc;	/* Checksum for the entire buffer data */
310  
311  	/* A page table that splits the block into a number of entries */
312  	u32 pt_size;		/* PCI allocation size in bytes */
313  	u64 *pt_cpu;		/* Virtual address */
314  	dma_addr_t pt_dma;	/* Physical address */
315  
316  	/* Encoder fops */
317  	u32 pos;
318  	u32 actual_size;
319  };
320  
321  struct saa7164_port {
322  
323  	struct saa7164_dev *dev;
324  	enum port_t type;
325  	int nr;
326  
327  	/* --- Generic port attributes --- */
328  
329  	/* HW stream parameters */
330  	struct tmHWStreamParameters hw_streamingparams;
331  
332  	/* DMA configuration values, is seeded during initialization */
333  	struct tmComResDMATermDescrHeader hwcfg;
334  
335  	/* hardware specific registers */
336  	u32 bufcounter;
337  	u32 pitch;
338  	u32 bufsize;
339  	u32 bufoffset;
340  	u32 bufptr32l;
341  	u32 bufptr32h;
342  	u64 bufptr64;
343  
344  	u32 numpte;	/* Number of entries in array, only valid in head */
345  
346  	struct mutex dmaqueue_lock;
347  	struct saa7164_buffer dmaqueue;
348  
349  	u64 last_irq_msecs, last_svc_msecs;
350  	u64 last_irq_msecs_diff, last_svc_msecs_diff;
351  	u32 last_svc_wp;
352  	u32 last_svc_rp;
353  	u64 last_irq_svc_msecs_diff;
354  	u64 last_read_msecs, last_read_msecs_diff;
355  	u64 last_poll_msecs, last_poll_msecs_diff;
356  
357  	struct saa7164_histogram irq_interval;
358  	struct saa7164_histogram svc_interval;
359  	struct saa7164_histogram irq_svc_interval;
360  	struct saa7164_histogram read_interval;
361  	struct saa7164_histogram poll_interval;
362  
363  	/* --- DVB Transport Specific --- */
364  	struct saa7164_dvb dvb;
365  	struct i2c_client *i2c_client_demod;
366  	struct i2c_client *i2c_client_tuner;
367  
368  	/* --- Encoder/V4L related attributes --- */
369  	/* Encoder */
370  	/* Defaults established in saa7164-encoder.c */
371  	struct saa7164_tvnorm encodernorm;
372  	struct v4l2_ctrl_handler ctrl_handler;
373  	v4l2_std_id std;
374  	u32 height;
375  	u32 width;
376  	u32 freq;
377  	u8 mux_input;
378  	u8 encoder_profile;
379  	u8 video_format;
380  	u8 audio_format;
381  	u8 video_resolution;
382  	u16 ctl_brightness;
383  	u16 ctl_contrast;
384  	u16 ctl_hue;
385  	u16 ctl_saturation;
386  	u16 ctl_sharpness;
387  	s8 ctl_volume;
388  
389  	struct tmComResAFeatureDescrHeader audfeat;
390  	struct tmComResEncoderDescrHeader encunit;
391  	struct tmComResProcDescrHeader vidproc;
392  	struct tmComResExtDevDescrHeader ifunit;
393  	struct tmComResTunerDescrHeader tunerunit;
394  
395  	struct work_struct workenc;
396  
397  	/* V4L Encoder Video */
398  	struct saa7164_encoder_params encoder_params;
399  	struct video_device *v4l_device;
400  	atomic_t v4l_reader_count;
401  
402  	struct saa7164_buffer list_buf_used;
403  	struct saa7164_buffer list_buf_free;
404  	wait_queue_head_t wait_read;
405  
406  	/* V4L VBI */
407  	struct tmComResVBIFormatDescrHeader vbi_fmt_ntsc;
408  	struct saa7164_vbi_params vbi_params;
409  	struct saa7164_port *enc_port;
410  
411  	/* Debug */
412  	u32 sync_errors;
413  	u32 v_cc_errors;
414  	u32 a_cc_errors;
415  	u8 last_v_cc;
416  	u8 last_a_cc;
417  	u32 done_first_interrupt;
418  };
419  
420  struct saa7164_dev {
421  	struct list_head	devlist;
422  	atomic_t		refcount;
423  
424  	struct v4l2_device v4l2_dev;
425  
426  	/* pci stuff */
427  	struct pci_dev	*pci;
428  	unsigned char	pci_rev, pci_lat;
429  	int		pci_bus, pci_slot;
430  	u32		__iomem *lmmio;
431  	u8		__iomem *bmmio;
432  	u32		__iomem *lmmio2;
433  	u8		__iomem *bmmio2;
434  	int		pci_irqmask;
435  
436  	/* board details */
437  	int	nr;
438  	int	hwrevision;
439  	u32	board;
440  	char	name[16];
441  
442  	/* firmware status */
443  	struct saa7164_fw_status	fw_status;
444  	u32				firmwareloaded;
445  
446  	struct tmComResHWDescr		hwdesc;
447  	struct tmComResInterfaceDescr	intfdesc;
448  	struct tmComResBusDescr		busdesc;
449  
450  	struct tmComResBusInfo		bus;
451  
452  	/* Interrupt status and ack registers */
453  	u32 int_status;
454  	u32 int_ack;
455  	bool msi;
456  
457  	struct cmd			cmds[SAA_CMD_MAX_MSG_UNITS];
458  	struct mutex			lock;
459  
460  	/* I2c related */
461  	struct saa7164_i2c i2c_bus[3];
462  
463  	/* Transport related */
464  	struct saa7164_port ports[SAA7164_MAX_PORTS];
465  
466  	/* Deferred command/api interrupts handling */
467  	struct work_struct workcmd;
468  
469  	/* A kernel thread to monitor the firmware log, used
470  	 * only in debug mode.
471  	 */
472  	struct task_struct *kthread;
473  
474  };
475  
476  extern struct list_head saa7164_devlist;
477  extern unsigned int waitsecs;
478  extern unsigned int encoder_buffers;
479  extern unsigned int vbi_buffers;
480  
481  /* ----------------------------------------------------------- */
482  /* saa7164-core.c                                              */
483  void saa7164_dumpregs(struct saa7164_dev *dev, u32 addr);
484  void saa7164_getfirmwarestatus(struct saa7164_dev *dev);
485  u32 saa7164_getcurrentfirmwareversion(struct saa7164_dev *dev);
486  void saa7164_histogram_update(struct saa7164_histogram *hg, u32 val);
487  
488  /* ----------------------------------------------------------- */
489  /* saa7164-fw.c                                                */
490  int saa7164_downloadfirmware(struct saa7164_dev *dev);
491  
492  /* ----------------------------------------------------------- */
493  /* saa7164-i2c.c                                               */
494  extern int saa7164_i2c_register(struct saa7164_i2c *bus);
495  extern int saa7164_i2c_unregister(struct saa7164_i2c *bus);
496  extern void saa7164_call_i2c_clients(struct saa7164_i2c *bus,
497  	unsigned int cmd, void *arg);
498  
499  /* ----------------------------------------------------------- */
500  /* saa7164-bus.c                                               */
501  int saa7164_bus_setup(struct saa7164_dev *dev);
502  void saa7164_bus_dump(struct saa7164_dev *dev);
503  int saa7164_bus_set(struct saa7164_dev *dev, struct tmComResInfo* msg,
504  	void *buf);
505  int saa7164_bus_get(struct saa7164_dev *dev, struct tmComResInfo* msg,
506  	void *buf, int peekonly);
507  
508  /* ----------------------------------------------------------- */
509  /* saa7164-cmd.c                                               */
510  int saa7164_cmd_send(struct saa7164_dev *dev,
511  	u8 id, enum tmComResCmd command, u16 controlselector,
512  	u16 size, void *buf);
513  void saa7164_cmd_signal(struct saa7164_dev *dev, u8 seqno);
514  int saa7164_irq_dequeue(struct saa7164_dev *dev);
515  
516  /* ----------------------------------------------------------- */
517  /* saa7164-api.c                                               */
518  int saa7164_api_get_fw_version(struct saa7164_dev *dev, u32 *version);
519  int saa7164_api_enum_subdevs(struct saa7164_dev *dev);
520  int saa7164_api_i2c_read(struct saa7164_i2c *bus, u8 addr, u32 reglen, u8 *reg,
521  	u32 datalen, u8 *data);
522  int saa7164_api_i2c_write(struct saa7164_i2c *bus, u8 addr,
523  	u32 datalen, u8 *data);
524  int saa7164_api_dif_write(struct saa7164_i2c *bus, u8 addr,
525  	u32 datalen, u8 *data);
526  int saa7164_api_read_eeprom(struct saa7164_dev *dev, u8 *buf, int buflen);
527  int saa7164_api_set_gpiobit(struct saa7164_dev *dev, u8 unitid, u8 pin);
528  int saa7164_api_clear_gpiobit(struct saa7164_dev *dev, u8 unitid, u8 pin);
529  int saa7164_api_transition_port(struct saa7164_port *port, u8 mode);
530  int saa7164_api_initialize_dif(struct saa7164_port *port);
531  int saa7164_api_configure_dif(struct saa7164_port *port, u32 std);
532  int saa7164_api_set_encoder(struct saa7164_port *port);
533  int saa7164_api_get_encoder(struct saa7164_port *port);
534  int saa7164_api_set_aspect_ratio(struct saa7164_port *port);
535  int saa7164_api_set_usercontrol(struct saa7164_port *port, u8 ctl);
536  int saa7164_api_get_usercontrol(struct saa7164_port *port, u8 ctl);
537  int saa7164_api_set_videomux(struct saa7164_port *port);
538  int saa7164_api_audio_mute(struct saa7164_port *port, int mute);
539  int saa7164_api_set_audio_volume(struct saa7164_port *port, s8 level);
540  int saa7164_api_set_audio_std(struct saa7164_port *port);
541  int saa7164_api_set_audio_detection(struct saa7164_port *port, int autodetect);
542  int saa7164_api_get_videomux(struct saa7164_port *port);
543  int saa7164_api_set_vbi_format(struct saa7164_port *port);
544  int saa7164_api_set_debug(struct saa7164_dev *dev, u8 level);
545  int saa7164_api_collect_debug(struct saa7164_dev *dev);
546  int saa7164_api_get_load_info(struct saa7164_dev *dev,
547  	struct tmFwInfoStruct *i);
548  
549  /* ----------------------------------------------------------- */
550  /* saa7164-cards.c                                             */
551  extern struct saa7164_board saa7164_boards[];
552  extern const unsigned int saa7164_bcount;
553  
554  extern struct saa7164_subid saa7164_subids[];
555  extern const unsigned int saa7164_idcount;
556  
557  extern void saa7164_card_list(struct saa7164_dev *dev);
558  extern void saa7164_gpio_setup(struct saa7164_dev *dev);
559  extern void saa7164_card_setup(struct saa7164_dev *dev);
560  
561  extern int saa7164_i2caddr_to_reglen(struct saa7164_i2c *bus, int addr);
562  extern int saa7164_i2caddr_to_unitid(struct saa7164_i2c *bus, int addr);
563  extern char *saa7164_unitid_name(struct saa7164_dev *dev, u8 unitid);
564  
565  /* ----------------------------------------------------------- */
566  /* saa7164-dvb.c                                               */
567  extern int saa7164_dvb_register(struct saa7164_port *port);
568  extern int saa7164_dvb_unregister(struct saa7164_port *port);
569  
570  /* ----------------------------------------------------------- */
571  /* saa7164-buffer.c                                            */
572  extern struct saa7164_buffer *saa7164_buffer_alloc(
573  	struct saa7164_port *port, u32 len);
574  extern int saa7164_buffer_dealloc(struct saa7164_buffer *buf);
575  extern void saa7164_buffer_display(struct saa7164_buffer *buf);
576  extern int saa7164_buffer_activate(struct saa7164_buffer *buf, int i);
577  extern int saa7164_buffer_cfg_port(struct saa7164_port *port);
578  extern struct saa7164_user_buffer *saa7164_buffer_alloc_user(
579  	struct saa7164_dev *dev, u32 len);
580  extern void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf);
581  extern int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i);
582  
583  /* ----------------------------------------------------------- */
584  /* saa7164-encoder.c                                            */
585  int saa7164_s_std(struct saa7164_port *port, v4l2_std_id id);
586  int saa7164_g_std(struct saa7164_port *port, v4l2_std_id *id);
587  int saa7164_enum_input(struct file *file, void *priv, struct v4l2_input *i);
588  int saa7164_g_input(struct saa7164_port *port, unsigned int *i);
589  int saa7164_s_input(struct saa7164_port *port, unsigned int i);
590  int saa7164_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t);
591  int saa7164_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t);
592  int saa7164_g_frequency(struct saa7164_port *port, struct v4l2_frequency *f);
593  int saa7164_s_frequency(struct saa7164_port *port,
594  			const struct v4l2_frequency *f);
595  int saa7164_encoder_register(struct saa7164_port *port);
596  void saa7164_encoder_unregister(struct saa7164_port *port);
597  
598  /* ----------------------------------------------------------- */
599  /* saa7164-vbi.c                                            */
600  int saa7164_vbi_register(struct saa7164_port *port);
601  void saa7164_vbi_unregister(struct saa7164_port *port);
602  
603  /* ----------------------------------------------------------- */
604  
605  extern unsigned int crc_checking;
606  
607  extern unsigned int saa_debug;
608  #define dprintk(level, fmt, arg...)\
609  	do { if (saa_debug & level)\
610  		printk(KERN_DEBUG "%s: " fmt, dev->name, ## arg);\
611  	} while (0)
612  
613  #define log_warn(fmt, arg...)\
614  	do { \
615  		printk(KERN_WARNING "%s: " fmt, dev->name, ## arg);\
616  	} while (0)
617  
618  #define saa7164_readl(reg) readl(dev->lmmio + ((reg) >> 2))
619  #define saa7164_writel(reg, value) writel((value), dev->lmmio + ((reg) >> 2))
620  
621  #define saa7164_readb(reg)             readl(dev->bmmio + (reg))
622  #define saa7164_writeb(reg, value)     writel((value), dev->bmmio + (reg))
623  
624