1 /*
2  *  Driver for the NXP SAA7164 PCIe bridge
3  *
4  *  Copyright (c) 2010 Steven Toth <stoth@kernellabs.com>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21 
22 /*
23 	Driver architecture
24 	*******************
25 
26 	saa7164_core.c/buffer.c/cards.c/i2c.c/dvb.c
27 		|	: Standard Linux driver framework for creating
28 		|	: exposing and managing interfaces to the rest
29 		|	: of the kernel or userland. Also uses _fw.c to load
30 		|	: firmware direct into the PCIe bus, bypassing layers.
31 		V
32 	saa7164_api..()	: Translate kernel specific functions/features
33 		|	: into command buffers.
34 		V
35 	saa7164_cmd..()	: Manages the flow of command packets on/off,
36 		|	: the bus. Deal with bus errors, timeouts etc.
37 		V
38 	saa7164_bus..() : Manage a read/write memory ring buffer in the
39 		|	: PCIe Address space.
40 		|
41 		|		saa7164_fw...()	: Load any frimware
42 		|			|	: direct into the device
43 		V			V
44 	<- ----------------- PCIe address space -------------------- ->
45 */
46 
47 #include <linux/pci.h>
48 #include <linux/i2c.h>
49 #include <linux/kdev_t.h>
50 #include <linux/mutex.h>
51 #include <linux/crc32.h>
52 #include <linux/kthread.h>
53 #include <linux/freezer.h>
54 
55 #include <media/tuner.h>
56 #include <media/tveeprom.h>
57 #include <media/videobuf-dma-sg.h>
58 #include <media/videobuf-dvb.h>
59 #include <dvb_demux.h>
60 #include <dvb_frontend.h>
61 #include <dvb_net.h>
62 #include <dvbdev.h>
63 #include <dmxdev.h>
64 #include <media/v4l2-common.h>
65 #include <media/v4l2-ioctl.h>
66 #include <media/v4l2-device.h>
67 
68 #include "saa7164-reg.h"
69 #include "saa7164-types.h"
70 
71 #define SAA7164_MAXBOARDS 8
72 
73 #define UNSET (-1U)
74 #define SAA7164_BOARD_NOAUTO			UNSET
75 #define SAA7164_BOARD_UNKNOWN			0
76 #define SAA7164_BOARD_UNKNOWN_REV2		1
77 #define SAA7164_BOARD_UNKNOWN_REV3		2
78 #define SAA7164_BOARD_HAUPPAUGE_HVR2250		3
79 #define SAA7164_BOARD_HAUPPAUGE_HVR2200		4
80 #define SAA7164_BOARD_HAUPPAUGE_HVR2200_2	5
81 #define SAA7164_BOARD_HAUPPAUGE_HVR2200_3	6
82 #define SAA7164_BOARD_HAUPPAUGE_HVR2250_2	7
83 #define SAA7164_BOARD_HAUPPAUGE_HVR2250_3	8
84 #define SAA7164_BOARD_HAUPPAUGE_HVR2200_4	9
85 #define SAA7164_BOARD_HAUPPAUGE_HVR2200_5	10
86 
87 #define SAA7164_MAX_UNITS		8
88 #define SAA7164_TS_NUMBER_OF_LINES	312
89 #define SAA7164_PS_NUMBER_OF_LINES	256
90 #define SAA7164_PT_ENTRIES		16 /* (312 * 188) / 4096 */
91 #define SAA7164_MAX_ENCODER_BUFFERS	64 /* max 5secs of latency at 6Mbps */
92 #define SAA7164_MAX_VBI_BUFFERS		64
93 
94 /* Port related defines */
95 #define SAA7164_PORT_TS1	(0)
96 #define SAA7164_PORT_TS2	(SAA7164_PORT_TS1 + 1)
97 #define SAA7164_PORT_ENC1	(SAA7164_PORT_TS2 + 1)
98 #define SAA7164_PORT_ENC2	(SAA7164_PORT_ENC1 + 1)
99 #define SAA7164_PORT_VBI1	(SAA7164_PORT_ENC2 + 1)
100 #define SAA7164_PORT_VBI2	(SAA7164_PORT_VBI1 + 1)
101 #define SAA7164_MAX_PORTS	(SAA7164_PORT_VBI2 + 1)
102 
103 #define DBGLVL_FW    4
104 #define DBGLVL_DVB   8
105 #define DBGLVL_I2C  16
106 #define DBGLVL_API  32
107 #define DBGLVL_CMD  64
108 #define DBGLVL_BUS 128
109 #define DBGLVL_IRQ 256
110 #define DBGLVL_BUF 512
111 #define DBGLVL_ENC 1024
112 #define DBGLVL_VBI 2048
113 #define DBGLVL_THR 4096
114 #define DBGLVL_CPU 8192
115 
116 #define SAA7164_NORMS \
117 	(V4L2_STD_NTSC_M |  V4L2_STD_NTSC_M_JP |  V4L2_STD_NTSC_443)
118 
119 enum port_t {
120 	SAA7164_MPEG_UNDEFINED = 0,
121 	SAA7164_MPEG_DVB,
122 	SAA7164_MPEG_ENCODER,
123 	SAA7164_MPEG_VBI,
124 };
125 
126 enum saa7164_i2c_bus_nr {
127 	SAA7164_I2C_BUS_0 = 0,
128 	SAA7164_I2C_BUS_1,
129 	SAA7164_I2C_BUS_2,
130 };
131 
132 enum saa7164_buffer_flags {
133 	SAA7164_BUFFER_UNDEFINED = 0,
134 	SAA7164_BUFFER_FREE,
135 	SAA7164_BUFFER_BUSY,
136 	SAA7164_BUFFER_FULL
137 };
138 
139 enum saa7164_unit_type {
140 	SAA7164_UNIT_UNDEFINED = 0,
141 	SAA7164_UNIT_DIGITAL_DEMODULATOR,
142 	SAA7164_UNIT_ANALOG_DEMODULATOR,
143 	SAA7164_UNIT_TUNER,
144 	SAA7164_UNIT_EEPROM,
145 	SAA7164_UNIT_ZILOG_IRBLASTER,
146 	SAA7164_UNIT_ENCODER,
147 };
148 
149 /* The PCIe bridge doesn't grant direct access to i2c.
150  * Instead, you address i2c devices using a uniqely
151  * allocated 'unitid' value via a messaging API. This
152  * is a problem. The kernel and existing demod/tuner
153  * drivers expect to talk 'i2c', so we have to maintain
154  * a translation layer, and a series of functions to
155  * convert i2c bus + device address into a unit id.
156  */
157 struct saa7164_unit {
158 	enum saa7164_unit_type type;
159 	u8	id;
160 	char	*name;
161 	enum saa7164_i2c_bus_nr i2c_bus_nr;
162 	u8	i2c_bus_addr;
163 	u8	i2c_reg_len;
164 };
165 
166 struct saa7164_board {
167 	char	*name;
168 	enum port_t porta, portb, portc,
169 		portd, porte, portf;
170 	enum {
171 		SAA7164_CHIP_UNDEFINED = 0,
172 		SAA7164_CHIP_REV2,
173 		SAA7164_CHIP_REV3,
174 	} chiprev;
175 	struct	saa7164_unit unit[SAA7164_MAX_UNITS];
176 };
177 
178 struct saa7164_subid {
179 	u16     subvendor;
180 	u16     subdevice;
181 	u32     card;
182 };
183 
184 struct saa7164_encoder_fh {
185 	struct saa7164_port *port;
186 	atomic_t v4l_reading;
187 };
188 
189 struct saa7164_vbi_fh {
190 	struct saa7164_port *port;
191 	atomic_t v4l_reading;
192 };
193 
194 struct saa7164_histogram_bucket {
195 	u32 val;
196 	u32 count;
197 	u64 update_time;
198 };
199 
200 struct saa7164_histogram {
201 	char name[32];
202 	struct saa7164_histogram_bucket counter1[64];
203 };
204 
205 struct saa7164_user_buffer {
206 	struct list_head list;
207 
208 	/* Attributes */
209 	u8  *data;
210 	u32 pos;
211 	u32 actual_size;
212 
213 	u32 crc;
214 };
215 
216 struct saa7164_fw_status {
217 
218 	/* RISC Core details */
219 	u32	status;
220 	u32	mode;
221 	u32	spec;
222 	u32	inst;
223 	u32	cpuload;
224 	u32	remainheap;
225 
226 	/* Firmware version */
227 	u32	version;
228 	u32	major;
229 	u32	sub;
230 	u32	rel;
231 	u32	buildnr;
232 };
233 
234 struct saa7164_dvb {
235 	struct mutex lock;
236 	struct dvb_adapter adapter;
237 	struct dvb_frontend *frontend;
238 	struct dvb_demux demux;
239 	struct dmxdev dmxdev;
240 	struct dmx_frontend fe_hw;
241 	struct dmx_frontend fe_mem;
242 	struct dvb_net net;
243 	int feeding;
244 };
245 
246 struct saa7164_i2c {
247 	struct saa7164_dev		*dev;
248 
249 	enum saa7164_i2c_bus_nr		nr;
250 
251 	/* I2C I/O */
252 	struct i2c_adapter		i2c_adap;
253 	struct i2c_client		i2c_client;
254 	u32				i2c_rc;
255 };
256 
257 struct saa7164_ctrl {
258 	struct v4l2_queryctrl v;
259 };
260 
261 struct saa7164_tvnorm {
262 	char		*name;
263 	v4l2_std_id	id;
264 };
265 
266 struct saa7164_encoder_params {
267 	struct saa7164_tvnorm encodernorm;
268 	u32 height;
269 	u32 width;
270 	u32 is_50hz;
271 	u32 bitrate; /* bps */
272 	u32 bitrate_peak; /* bps */
273 	u32 bitrate_mode;
274 	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */
275 
276 	u32 audio_sampling_freq;
277 	u32 ctl_mute;
278 	u32 ctl_aspect;
279 	u32 refdist;
280 	u32 gop_size;
281 };
282 
283 struct saa7164_vbi_params {
284 	struct saa7164_tvnorm encodernorm;
285 	u32 height;
286 	u32 width;
287 	u32 is_50hz;
288 	u32 bitrate; /* bps */
289 	u32 bitrate_peak; /* bps */
290 	u32 bitrate_mode;
291 	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */
292 
293 	u32 audio_sampling_freq;
294 	u32 ctl_mute;
295 	u32 ctl_aspect;
296 	u32 refdist;
297 	u32 gop_size;
298 };
299 
300 struct saa7164_port;
301 
302 struct saa7164_buffer {
303 	struct list_head list;
304 
305 	/* Note of which h/w buffer list index position we occupy */
306 	int idx;
307 
308 	struct saa7164_port *port;
309 
310 	/* Hardware Specific */
311 	/* PCI Memory allocations */
312 	enum saa7164_buffer_flags flags; /* Free, Busy, Full */
313 
314 	/* A block of page align PCI memory */
315 	u32 pci_size;	/* PCI allocation size in bytes */
316 	u64 __iomem *cpu;	/* Virtual address */
317 	dma_addr_t dma;	/* Physical address */
318 	u32 crc;	/* Checksum for the entire buffer data */
319 
320 	/* A page table that splits the block into a number of entries */
321 	u32 pt_size;		/* PCI allocation size in bytes */
322 	u64 __iomem *pt_cpu;		/* Virtual address */
323 	dma_addr_t pt_dma;	/* Physical address */
324 
325 	/* Encoder fops */
326 	u32 pos;
327 	u32 actual_size;
328 };
329 
330 struct saa7164_port {
331 
332 	struct saa7164_dev *dev;
333 	enum port_t type;
334 	int nr;
335 
336 	/* --- Generic port attributes --- */
337 
338 	/* HW stream parameters */
339 	struct tmHWStreamParameters hw_streamingparams;
340 
341 	/* DMA configuration values, is seeded during initialization */
342 	struct tmComResDMATermDescrHeader hwcfg;
343 
344 	/* hardware specific registers */
345 	u32 bufcounter;
346 	u32 pitch;
347 	u32 bufsize;
348 	u32 bufoffset;
349 	u32 bufptr32l;
350 	u32 bufptr32h;
351 	u64 bufptr64;
352 
353 	u32 numpte;	/* Number of entries in array, only valid in head */
354 
355 	struct mutex dmaqueue_lock;
356 	struct saa7164_buffer dmaqueue;
357 
358 	u64 last_irq_msecs, last_svc_msecs;
359 	u64 last_irq_msecs_diff, last_svc_msecs_diff;
360 	u32 last_svc_wp;
361 	u32 last_svc_rp;
362 	u64 last_irq_svc_msecs_diff;
363 	u64 last_read_msecs, last_read_msecs_diff;
364 	u64 last_poll_msecs, last_poll_msecs_diff;
365 
366 	struct saa7164_histogram irq_interval;
367 	struct saa7164_histogram svc_interval;
368 	struct saa7164_histogram irq_svc_interval;
369 	struct saa7164_histogram read_interval;
370 	struct saa7164_histogram poll_interval;
371 
372 	/* --- DVB Transport Specific --- */
373 	struct saa7164_dvb dvb;
374 
375 	/* --- Encoder/V4L related attributes --- */
376 	/* Encoder */
377 	/* Defaults established in saa7164-encoder.c */
378 	struct saa7164_tvnorm encodernorm;
379 	v4l2_std_id std;
380 	u32 height;
381 	u32 width;
382 	u32 freq;
383 	u32 ts_packet_size;
384 	u32 ts_packet_count;
385 	u8 mux_input;
386 	u8 encoder_profile;
387 	u8 video_format;
388 	u8 audio_format;
389 	u8 video_resolution;
390 	u16 ctl_brightness;
391 	u16 ctl_contrast;
392 	u16 ctl_hue;
393 	u16 ctl_saturation;
394 	u16 ctl_sharpness;
395 	s8 ctl_volume;
396 
397 	struct tmComResAFeatureDescrHeader audfeat;
398 	struct tmComResEncoderDescrHeader encunit;
399 	struct tmComResProcDescrHeader vidproc;
400 	struct tmComResExtDevDescrHeader ifunit;
401 	struct tmComResTunerDescrHeader tunerunit;
402 
403 	struct work_struct workenc;
404 
405 	/* V4L Encoder Video */
406 	struct saa7164_encoder_params encoder_params;
407 	struct video_device *v4l_device;
408 	atomic_t v4l_reader_count;
409 
410 	struct saa7164_buffer list_buf_used;
411 	struct saa7164_buffer list_buf_free;
412 	wait_queue_head_t wait_read;
413 
414 	/* V4L VBI */
415 	struct tmComResVBIFormatDescrHeader vbi_fmt_ntsc;
416 	struct saa7164_vbi_params vbi_params;
417 
418 	/* Debug */
419 	u32 sync_errors;
420 	u32 v_cc_errors;
421 	u32 a_cc_errors;
422 	u8 last_v_cc;
423 	u8 last_a_cc;
424 	u32 done_first_interrupt;
425 };
426 
427 struct saa7164_dev {
428 	struct list_head	devlist;
429 	atomic_t		refcount;
430 
431 	struct v4l2_device v4l2_dev;
432 
433 	/* pci stuff */
434 	struct pci_dev	*pci;
435 	unsigned char	pci_rev, pci_lat;
436 	int		pci_bus, pci_slot;
437 	u32		__iomem *lmmio;
438 	u8		__iomem *bmmio;
439 	u32		__iomem *lmmio2;
440 	u8		__iomem *bmmio2;
441 	int		pci_irqmask;
442 
443 	/* board details */
444 	int	nr;
445 	int	hwrevision;
446 	u32	board;
447 	char	name[16];
448 
449 	/* firmware status */
450 	struct saa7164_fw_status	fw_status;
451 	u32				firmwareloaded;
452 
453 	struct tmComResHWDescr		hwdesc;
454 	struct tmComResInterfaceDescr	intfdesc;
455 	struct tmComResBusDescr		busdesc;
456 
457 	struct tmComResBusInfo		bus;
458 
459 	/* Interrupt status and ack registers */
460 	u32 int_status;
461 	u32 int_ack;
462 
463 	struct cmd			cmds[SAA_CMD_MAX_MSG_UNITS];
464 	struct mutex			lock;
465 
466 	/* I2c related */
467 	struct saa7164_i2c i2c_bus[3];
468 
469 	/* Transport related */
470 	struct saa7164_port ports[SAA7164_MAX_PORTS];
471 
472 	/* Deferred command/api interrupts handling */
473 	struct work_struct workcmd;
474 
475 	/* A kernel thread to monitor the firmware log, used
476 	 * only in debug mode.
477 	 */
478 	struct task_struct *kthread;
479 
480 };
481 
482 extern struct list_head saa7164_devlist;
483 extern unsigned int waitsecs;
484 extern unsigned int encoder_buffers;
485 extern unsigned int vbi_buffers;
486 
487 /* ----------------------------------------------------------- */
488 /* saa7164-core.c                                              */
489 void saa7164_dumpregs(struct saa7164_dev *dev, u32 addr);
490 void saa7164_getfirmwarestatus(struct saa7164_dev *dev);
491 u32 saa7164_getcurrentfirmwareversion(struct saa7164_dev *dev);
492 void saa7164_histogram_update(struct saa7164_histogram *hg, u32 val);
493 
494 /* ----------------------------------------------------------- */
495 /* saa7164-fw.c                                                */
496 int saa7164_downloadfirmware(struct saa7164_dev *dev);
497 
498 /* ----------------------------------------------------------- */
499 /* saa7164-i2c.c                                               */
500 extern int saa7164_i2c_register(struct saa7164_i2c *bus);
501 extern int saa7164_i2c_unregister(struct saa7164_i2c *bus);
502 extern void saa7164_call_i2c_clients(struct saa7164_i2c *bus,
503 	unsigned int cmd, void *arg);
504 
505 /* ----------------------------------------------------------- */
506 /* saa7164-bus.c                                               */
507 int saa7164_bus_setup(struct saa7164_dev *dev);
508 void saa7164_bus_dump(struct saa7164_dev *dev);
509 int saa7164_bus_set(struct saa7164_dev *dev, struct tmComResInfo* msg,
510 	void *buf);
511 int saa7164_bus_get(struct saa7164_dev *dev, struct tmComResInfo* msg,
512 	void *buf, int peekonly);
513 
514 /* ----------------------------------------------------------- */
515 /* saa7164-cmd.c                                               */
516 int saa7164_cmd_send(struct saa7164_dev *dev,
517 	u8 id, enum tmComResCmd command, u16 controlselector,
518 	u16 size, void *buf);
519 void saa7164_cmd_signal(struct saa7164_dev *dev, u8 seqno);
520 int saa7164_irq_dequeue(struct saa7164_dev *dev);
521 
522 /* ----------------------------------------------------------- */
523 /* saa7164-api.c                                               */
524 int saa7164_api_get_fw_version(struct saa7164_dev *dev, u32 *version);
525 int saa7164_api_enum_subdevs(struct saa7164_dev *dev);
526 int saa7164_api_i2c_read(struct saa7164_i2c *bus, u8 addr, u32 reglen, u8 *reg,
527 	u32 datalen, u8 *data);
528 int saa7164_api_i2c_write(struct saa7164_i2c *bus, u8 addr,
529 	u32 datalen, u8 *data);
530 int saa7164_api_dif_write(struct saa7164_i2c *bus, u8 addr,
531 	u32 datalen, u8 *data);
532 int saa7164_api_read_eeprom(struct saa7164_dev *dev, u8 *buf, int buflen);
533 int saa7164_api_set_gpiobit(struct saa7164_dev *dev, u8 unitid, u8 pin);
534 int saa7164_api_clear_gpiobit(struct saa7164_dev *dev, u8 unitid, u8 pin);
535 int saa7164_api_transition_port(struct saa7164_port *port, u8 mode);
536 int saa7164_api_initialize_dif(struct saa7164_port *port);
537 int saa7164_api_configure_dif(struct saa7164_port *port, u32 std);
538 int saa7164_api_set_encoder(struct saa7164_port *port);
539 int saa7164_api_get_encoder(struct saa7164_port *port);
540 int saa7164_api_set_aspect_ratio(struct saa7164_port *port);
541 int saa7164_api_set_usercontrol(struct saa7164_port *port, u8 ctl);
542 int saa7164_api_get_usercontrol(struct saa7164_port *port, u8 ctl);
543 int saa7164_api_set_videomux(struct saa7164_port *port);
544 int saa7164_api_audio_mute(struct saa7164_port *port, int mute);
545 int saa7164_api_set_audio_volume(struct saa7164_port *port, s8 level);
546 int saa7164_api_set_audio_std(struct saa7164_port *port);
547 int saa7164_api_set_audio_detection(struct saa7164_port *port, int autodetect);
548 int saa7164_api_get_videomux(struct saa7164_port *port);
549 int saa7164_api_set_vbi_format(struct saa7164_port *port);
550 int saa7164_api_set_debug(struct saa7164_dev *dev, u8 level);
551 int saa7164_api_collect_debug(struct saa7164_dev *dev);
552 int saa7164_api_get_load_info(struct saa7164_dev *dev,
553 	struct tmFwInfoStruct *i);
554 
555 /* ----------------------------------------------------------- */
556 /* saa7164-cards.c                                             */
557 extern struct saa7164_board saa7164_boards[];
558 extern const unsigned int saa7164_bcount;
559 
560 extern struct saa7164_subid saa7164_subids[];
561 extern const unsigned int saa7164_idcount;
562 
563 extern void saa7164_card_list(struct saa7164_dev *dev);
564 extern void saa7164_gpio_setup(struct saa7164_dev *dev);
565 extern void saa7164_card_setup(struct saa7164_dev *dev);
566 
567 extern int saa7164_i2caddr_to_reglen(struct saa7164_i2c *bus, int addr);
568 extern int saa7164_i2caddr_to_unitid(struct saa7164_i2c *bus, int addr);
569 extern char *saa7164_unitid_name(struct saa7164_dev *dev, u8 unitid);
570 
571 /* ----------------------------------------------------------- */
572 /* saa7164-dvb.c                                               */
573 extern int saa7164_dvb_register(struct saa7164_port *port);
574 extern int saa7164_dvb_unregister(struct saa7164_port *port);
575 
576 /* ----------------------------------------------------------- */
577 /* saa7164-buffer.c                                            */
578 extern struct saa7164_buffer *saa7164_buffer_alloc(
579 	struct saa7164_port *port, u32 len);
580 extern int saa7164_buffer_dealloc(struct saa7164_buffer *buf);
581 extern void saa7164_buffer_display(struct saa7164_buffer *buf);
582 extern int saa7164_buffer_activate(struct saa7164_buffer *buf, int i);
583 extern int saa7164_buffer_cfg_port(struct saa7164_port *port);
584 extern struct saa7164_user_buffer *saa7164_buffer_alloc_user(
585 	struct saa7164_dev *dev, u32 len);
586 extern void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf);
587 extern int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i);
588 
589 /* ----------------------------------------------------------- */
590 /* saa7164-encoder.c                                            */
591 int saa7164_encoder_register(struct saa7164_port *port);
592 void saa7164_encoder_unregister(struct saa7164_port *port);
593 
594 /* ----------------------------------------------------------- */
595 /* saa7164-vbi.c                                            */
596 int saa7164_vbi_register(struct saa7164_port *port);
597 void saa7164_vbi_unregister(struct saa7164_port *port);
598 
599 /* ----------------------------------------------------------- */
600 
601 extern unsigned int crc_checking;
602 
603 extern unsigned int saa_debug;
604 #define dprintk(level, fmt, arg...)\
605 	do { if (saa_debug & level)\
606 		printk(KERN_DEBUG "%s: " fmt, dev->name, ## arg);\
607 	} while (0)
608 
609 #define log_warn(fmt, arg...)\
610 	do { \
611 		printk(KERN_WARNING "%s: " fmt, dev->name, ## arg);\
612 	} while (0)
613 
614 #define saa7164_readl(reg) readl(dev->lmmio + ((reg) >> 2))
615 #define saa7164_writel(reg, value) writel((value), dev->lmmio + ((reg) >> 2))
616 
617 #define saa7164_readb(reg)             readl(dev->bmmio + (reg))
618 #define saa7164_writeb(reg, value)     writel((value), dev->bmmio + (reg))
619 
620