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-rw-r--r--drivers/media/video/saa5246a.c556
1 files changed, 413 insertions, 143 deletions
diff --git a/drivers/media/video/saa5246a.c b/drivers/media/video/saa5246a.c
index 6ee63e69b36c..4a21b8a6a709 100644
--- a/drivers/media/video/saa5246a.c
+++ b/drivers/media/video/saa5246a.c
@@ -43,135 +43,363 @@
43#include <linux/mm.h> 43#include <linux/mm.h>
44#include <linux/init.h> 44#include <linux/init.h>
45#include <linux/i2c.h> 45#include <linux/i2c.h>
46#include <linux/smp_lock.h>
47#include <linux/mutex.h>
46#include <linux/videotext.h> 48#include <linux/videotext.h>
47#include <linux/videodev.h> 49#include <linux/videodev.h>
48#include <media/v4l2-common.h> 50#include <media/v4l2-common.h>
49#include <media/v4l2-ioctl.h> 51#include <media/v4l2-ioctl.h>
50#include <linux/mutex.h> 52#include <media/v4l2-i2c-drv-legacy.h>
51
52#include "saa5246a.h"
53 53
54MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>"); 54MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
55MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver"); 55MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver");
56MODULE_LICENSE("GPL"); 56MODULE_LICENSE("GPL");
57 57
58struct saa5246a_device 58#define MAJOR_VERSION 1 /* driver major version number */
59{ 59#define MINOR_VERSION 8 /* driver minor version number */
60 u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE]; 60
61 int is_searching[NUM_DAUS]; 61/* Number of DAUs = number of pages that can be searched at the same time. */
62 struct i2c_client *client; 62#define NUM_DAUS 4
63 struct mutex lock; 63
64}; 64#define NUM_ROWS_PER_PAGE 40
65
66/* first column is 0 (not 1) */
67#define POS_TIME_START 32
68#define POS_TIME_END 39
69
70#define POS_HEADER_START 7
71#define POS_HEADER_END 31
72
73/* Returns 'true' if the part of the videotext page described with req contains
74 (at least parts of) the time field */
75#define REQ_CONTAINS_TIME(p_req) \
76 ((p_req)->start <= POS_TIME_END && \
77 (p_req)->end >= POS_TIME_START)
78
79/* Returns 'true' if the part of the videotext page described with req contains
80 (at least parts of) the page header */
81#define REQ_CONTAINS_HEADER(p_req) \
82 ((p_req)->start <= POS_HEADER_END && \
83 (p_req)->end >= POS_HEADER_START)
84
85/*****************************************************************************/
86/* Mode register numbers of the SAA5246A */
87/*****************************************************************************/
88#define SAA5246A_REGISTER_R0 0
89#define SAA5246A_REGISTER_R1 1
90#define SAA5246A_REGISTER_R2 2
91#define SAA5246A_REGISTER_R3 3
92#define SAA5246A_REGISTER_R4 4
93#define SAA5246A_REGISTER_R5 5
94#define SAA5246A_REGISTER_R6 6
95#define SAA5246A_REGISTER_R7 7
96#define SAA5246A_REGISTER_R8 8
97#define SAA5246A_REGISTER_R9 9
98#define SAA5246A_REGISTER_R10 10
99#define SAA5246A_REGISTER_R11 11
100#define SAA5246A_REGISTER_R11B 11
101
102/* SAA5246A mode registers often autoincrement to the next register.
103 Therefore we use variable argument lists. The following macro indicates
104 the end of a command list. */
105#define COMMAND_END (-1)
106
107/*****************************************************************************/
108/* Contents of the mode registers of the SAA5246A */
109/*****************************************************************************/
110/* Register R0 (Advanced Control) */
111#define R0_SELECT_R11 0x00
112#define R0_SELECT_R11B 0x01
113
114#define R0_PLL_TIME_CONSTANT_LONG 0x00
115#define R0_PLL_TIME_CONSTANT_SHORT 0x02
116
117#define R0_ENABLE_nODD_EVEN_OUTPUT 0x00
118#define R0_DISABLE_nODD_EVEN_OUTPUT 0x04
119
120#define R0_ENABLE_HDR_POLL 0x00
121#define R0_DISABLE_HDR_POLL 0x10
122
123#define R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x00
124#define R0_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x20
125
126#define R0_NO_FREE_RUN_PLL 0x00
127#define R0_FREE_RUN_PLL 0x40
128
129#define R0_NO_AUTOMATIC_FASTEXT_PROMPT 0x00
130#define R0_AUTOMATIC_FASTEXT_PROMPT 0x80
131
132/* Register R1 (Mode) */
133#define R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES 0x00
134#define R1_NON_INTERLACED_312_313_LINES 0x01
135#define R1_NON_INTERLACED_312_312_LINES 0x02
136#define R1_FFB_LEADING_EDGE_IN_FIRST_BROAD_PULSE 0x03
137#define R1_FFB_LEADING_EDGE_IN_SECOND_BROAD_PULSE 0x07
138
139#define R1_DEW 0x00
140#define R1_FULL_FIELD 0x08
141
142#define R1_EXTENDED_PACKET_DISABLE 0x00
143#define R1_EXTENDED_PACKET_ENABLE 0x10
144
145#define R1_DAUS_ALL_ON 0x00
146#define R1_DAUS_ALL_OFF 0x20
147
148#define R1_7_BITS_PLUS_PARITY 0x00
149#define R1_8_BITS_NO_PARITY 0x40
150
151#define R1_VCS_TO_SCS 0x00
152#define R1_NO_VCS_TO_SCS 0x80
153
154/* Register R2 (Page request address) */
155#define R2_IN_R3_SELECT_PAGE_HUNDREDS 0x00
156#define R2_IN_R3_SELECT_PAGE_TENS 0x01
157#define R2_IN_R3_SELECT_PAGE_UNITS 0x02
158#define R2_IN_R3_SELECT_HOURS_TENS 0x03
159#define R2_IN_R3_SELECT_HOURS_UNITS 0x04
160#define R2_IN_R3_SELECT_MINUTES_TENS 0x05
161#define R2_IN_R3_SELECT_MINUTES_UNITS 0x06
162
163#define R2_DAU_0 0x00
164#define R2_DAU_1 0x10
165#define R2_DAU_2 0x20
166#define R2_DAU_3 0x30
167
168#define R2_BANK_0 0x00
169#define R2_BANK 1 0x40
170
171#define R2_HAMMING_CHECK_ON 0x80
172#define R2_HAMMING_CHECK_OFF 0x00
173
174/* Register R3 (Page request data) */
175#define R3_PAGE_HUNDREDS_0 0x00
176#define R3_PAGE_HUNDREDS_1 0x01
177#define R3_PAGE_HUNDREDS_2 0x02
178#define R3_PAGE_HUNDREDS_3 0x03
179#define R3_PAGE_HUNDREDS_4 0x04
180#define R3_PAGE_HUNDREDS_5 0x05
181#define R3_PAGE_HUNDREDS_6 0x06
182#define R3_PAGE_HUNDREDS_7 0x07
65 183
66static struct video_device saa_template; /* Declared near bottom */ 184#define R3_HOLD_PAGE 0x00
185#define R3_UPDATE_PAGE 0x08
67 186
68/* Addresses to scan */ 187#define R3_PAGE_HUNDREDS_DO_NOT_CARE 0x00
69static unsigned short normal_i2c[] = { I2C_ADDRESS, I2C_CLIENT_END }; 188#define R3_PAGE_HUNDREDS_DO_CARE 0x10
70 189
71I2C_CLIENT_INSMOD; 190#define R3_PAGE_TENS_DO_NOT_CARE 0x00
191#define R3_PAGE_TENS_DO_CARE 0x10
72 192
73static struct i2c_client client_template; 193#define R3_PAGE_UNITS_DO_NOT_CARE 0x00
194#define R3_PAGE_UNITS_DO_CARE 0x10
74 195
75static int saa5246a_attach(struct i2c_adapter *adap, int addr, int kind) 196#define R3_HOURS_TENS_DO_NOT_CARE 0x00
76{ 197#define R3_HOURS_TENS_DO_CARE 0x10
77 int pgbuf;
78 int err;
79 struct i2c_client *client;
80 struct video_device *vd;
81 struct saa5246a_device *t;
82 198
83 printk(KERN_INFO "saa5246a: teletext chip found.\n"); 199#define R3_HOURS_UNITS_DO_NOT_CARE 0x00
84 client=kmalloc(sizeof(*client), GFP_KERNEL); 200#define R3_HOURS_UNITS_DO_CARE 0x10
85 if(client==NULL)
86 return -ENOMEM;
87 client_template.adapter = adap;
88 client_template.addr = addr;
89 memcpy(client, &client_template, sizeof(*client));
90 t = kzalloc(sizeof(*t), GFP_KERNEL);
91 if(t==NULL)
92 {
93 kfree(client);
94 return -ENOMEM;
95 }
96 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
97 mutex_init(&t->lock);
98 201
99 /* 202#define R3_MINUTES_TENS_DO_NOT_CARE 0x00
100 * Now create a video4linux device 203#define R3_MINUTES_TENS_DO_CARE 0x10
101 */
102 204
103 vd = video_device_alloc(); 205#define R3_MINUTES_UNITS_DO_NOT_CARE 0x00
104 if(vd==NULL) 206#define R3_MINUTES_UNITS_DO_CARE 0x10
105 {
106 kfree(t);
107 kfree(client);
108 return -ENOMEM;
109 }
110 i2c_set_clientdata(client, vd);
111 memcpy(vd, &saa_template, sizeof(*vd));
112 207
113 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) 208/* Register R4 (Display chapter) */
114 { 209#define R4_DISPLAY_PAGE_0 0x00
115 memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0])); 210#define R4_DISPLAY_PAGE_1 0x01
116 t->is_searching[pgbuf] = false; 211#define R4_DISPLAY_PAGE_2 0x02
117 } 212#define R4_DISPLAY_PAGE_3 0x03
118 vd->priv=t; 213#define R4_DISPLAY_PAGE_4 0x04
214#define R4_DISPLAY_PAGE_5 0x05
215#define R4_DISPLAY_PAGE_6 0x06
216#define R4_DISPLAY_PAGE_7 0x07
119 217
218/* Register R5 (Normal display control) */
219#define R5_PICTURE_INSIDE_BOXING_OFF 0x00
220#define R5_PICTURE_INSIDE_BOXING_ON 0x01
120 221
121 /* 222#define R5_PICTURE_OUTSIDE_BOXING_OFF 0x00
122 * Register it 223#define R5_PICTURE_OUTSIDE_BOXING_ON 0x02
123 */
124 224
125 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0) 225#define R5_TEXT_INSIDE_BOXING_OFF 0x00
126 { 226#define R5_TEXT_INSIDE_BOXING_ON 0x04
127 kfree(t);
128 kfree(client);
129 video_device_release(vd);
130 return err;
131 }
132 t->client = client;
133 i2c_attach_client(client);
134 return 0;
135}
136 227
137/* 228#define R5_TEXT_OUTSIDE_BOXING_OFF 0x00
138 * We do most of the hard work when we become a device on the i2c. 229#define R5_TEXT_OUTSIDE_BOXING_ON 0x08
139 */
140static int saa5246a_probe(struct i2c_adapter *adap)
141{
142 if (adap->class & I2C_CLASS_TV_ANALOG)
143 return i2c_probe(adap, &addr_data, saa5246a_attach);
144 return 0;
145}
146 230
147static int saa5246a_detach(struct i2c_client *client) 231#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00
148{ 232#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10
149 struct video_device *vd = i2c_get_clientdata(client);
150 i2c_detach_client(client);
151 video_unregister_device(vd);
152 kfree(vd->priv);
153 kfree(client);
154 return 0;
155}
156 233
157/* 234#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00
158 * I2C interfaces 235#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20
159 */ 236
237#define R5_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00
238#define R5_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40
239
240#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00
241#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80
242
243/* Register R6 (Newsflash display) */
244#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_OFF 0x00
245#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_ON 0x01
246
247#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_OFF 0x00
248#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_ON 0x02
249
250#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_OFF 0x00
251#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_ON 0x04
252
253#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_OFF 0x00
254#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_ON 0x08
255
256#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00
257#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10
258
259#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00
260#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20
261
262#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00
263#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40
264
265#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00
266#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80
267
268/* Register R7 (Display mode) */
269#define R7_BOX_OFF_ROW_0 0x00
270#define R7_BOX_ON_ROW_0 0x01
271
272#define R7_BOX_OFF_ROW_1_TO_23 0x00
273#define R7_BOX_ON_ROW_1_TO_23 0x02
274
275#define R7_BOX_OFF_ROW_24 0x00
276#define R7_BOX_ON_ROW_24 0x04
277
278#define R7_SINGLE_HEIGHT 0x00
279#define R7_DOUBLE_HEIGHT 0x08
280
281#define R7_TOP_HALF 0x00
282#define R7_BOTTOM_HALF 0x10
283
284#define R7_REVEAL_OFF 0x00
285#define R7_REVEAL_ON 0x20
286
287#define R7_CURSER_OFF 0x00
288#define R7_CURSER_ON 0x40
289
290#define R7_STATUS_BOTTOM 0x00
291#define R7_STATUS_TOP 0x80
292
293/* Register R8 (Active chapter) */
294#define R8_ACTIVE_CHAPTER_0 0x00
295#define R8_ACTIVE_CHAPTER_1 0x01
296#define R8_ACTIVE_CHAPTER_2 0x02
297#define R8_ACTIVE_CHAPTER_3 0x03
298#define R8_ACTIVE_CHAPTER_4 0x04
299#define R8_ACTIVE_CHAPTER_5 0x05
300#define R8_ACTIVE_CHAPTER_6 0x06
301#define R8_ACTIVE_CHAPTER_7 0x07
302
303#define R8_CLEAR_MEMORY 0x08
304#define R8_DO_NOT_CLEAR_MEMORY 0x00
305
306/* Register R9 (Curser row) */
307#define R9_CURSER_ROW_0 0x00
308#define R9_CURSER_ROW_1 0x01
309#define R9_CURSER_ROW_2 0x02
310#define R9_CURSER_ROW_25 0x19
311
312/* Register R10 (Curser column) */
313#define R10_CURSER_COLUMN_0 0x00
314#define R10_CURSER_COLUMN_6 0x06
315#define R10_CURSER_COLUMN_8 0x08
316
317/*****************************************************************************/
318/* Row 25 control data in column 0 to 9 */
319/*****************************************************************************/
320#define ROW25_COLUMN0_PAGE_UNITS 0x0F
321
322#define ROW25_COLUMN1_PAGE_TENS 0x0F
323
324#define ROW25_COLUMN2_MINUTES_UNITS 0x0F
160 325
161static struct i2c_driver i2c_driver_videotext = 326#define ROW25_COLUMN3_MINUTES_TENS 0x07
327#define ROW25_COLUMN3_DELETE_PAGE 0x08
328
329#define ROW25_COLUMN4_HOUR_UNITS 0x0F
330
331#define ROW25_COLUMN5_HOUR_TENS 0x03
332#define ROW25_COLUMN5_INSERT_HEADLINE 0x04
333#define ROW25_COLUMN5_INSERT_SUBTITLE 0x08
334
335#define ROW25_COLUMN6_SUPPRESS_HEADER 0x01
336#define ROW25_COLUMN6_UPDATE_PAGE 0x02
337#define ROW25_COLUMN6_INTERRUPTED_SEQUENCE 0x04
338#define ROW25_COLUMN6_SUPPRESS_DISPLAY 0x08
339
340#define ROW25_COLUMN7_SERIAL_MODE 0x01
341#define ROW25_COLUMN7_CHARACTER_SET 0x0E
342
343#define ROW25_COLUMN8_PAGE_HUNDREDS 0x07
344#define ROW25_COLUMN8_PAGE_NOT_FOUND 0x10
345
346#define ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR 0x20
347
348#define ROW25_COLUMN0_TO_7_HAMMING_ERROR 0x10
349
350/*****************************************************************************/
351/* Helper macros for extracting page, hour and minute digits */
352/*****************************************************************************/
353/* BYTE_POS 0 is at row 0, column 0,
354 BYTE_POS 1 is at row 0, column 1,
355 BYTE_POS 40 is at row 1, column 0, (with NUM_ROWS_PER_PAGE = 40)
356 BYTE_POS 41 is at row 1, column 1, (with NUM_ROWS_PER_PAGE = 40),
357 ... */
358#define ROW(BYTE_POS) (BYTE_POS / NUM_ROWS_PER_PAGE)
359#define COLUMN(BYTE_POS) (BYTE_POS % NUM_ROWS_PER_PAGE)
360
361/*****************************************************************************/
362/* Helper macros for extracting page, hour and minute digits */
363/*****************************************************************************/
364/* Macros for extracting hundreds, tens and units of a page number which
365 must be in the range 0 ... 0x799.
366 Note that page is coded in hexadecimal, i.e. 0x123 means page 123.
367 page 0x.. means page 8.. */
368#define HUNDREDS_OF_PAGE(page) (((page) / 0x100) & 0x7)
369#define TENS_OF_PAGE(page) (((page) / 0x10) & 0xF)
370#define UNITS_OF_PAGE(page) ((page) & 0xF)
371
372/* Macros for extracting tens and units of a hour information which
373 must be in the range 0 ... 0x24.
374 Note that hour is coded in hexadecimal, i.e. 0x12 means 12 hours */
375#define TENS_OF_HOUR(hour) ((hour) / 0x10)
376#define UNITS_OF_HOUR(hour) ((hour) & 0xF)
377
378/* Macros for extracting tens and units of a minute information which
379 must be in the range 0 ... 0x59.
380 Note that minute is coded in hexadecimal, i.e. 0x12 means 12 minutes */
381#define TENS_OF_MINUTE(minute) ((minute) / 0x10)
382#define UNITS_OF_MINUTE(minute) ((minute) & 0xF)
383
384#define HOUR_MAX 0x23
385#define MINUTE_MAX 0x59
386#define PAGE_MAX 0x8FF
387
388
389struct saa5246a_device
162{ 390{
163 .driver = { 391 u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE];
164 .name = IF_NAME, /* name */ 392 int is_searching[NUM_DAUS];
165 }, 393 struct i2c_client *client;
166 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */ 394 unsigned long in_use;
167 .attach_adapter = saa5246a_probe, 395 struct mutex lock;
168 .detach_client = saa5246a_detach,
169}; 396};
170 397
171static struct i2c_client client_template = { 398static struct video_device saa_template; /* Declared near bottom */
172 .driver = &i2c_driver_videotext, 399
173 .name = "(unset)", 400/*
174}; 401 * I2C interfaces
402 */
175 403
176static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data) 404static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data)
177{ 405{
@@ -579,8 +807,8 @@ static inline int saa5246a_stop_dau(struct saa5246a_device *t,
579static int do_saa5246a_ioctl(struct inode *inode, struct file *file, 807static int do_saa5246a_ioctl(struct inode *inode, struct file *file,
580 unsigned int cmd, void *arg) 808 unsigned int cmd, void *arg)
581{ 809{
582 struct video_device *vd = video_devdata(file); 810 struct saa5246a_device *t = video_drvdata(file);
583 struct saa5246a_device *t=vd->priv; 811
584 switch(cmd) 812 switch(cmd)
585 { 813 {
586 case VTXIOCGETINFO: 814 case VTXIOCGETINFO:
@@ -720,8 +948,7 @@ static inline unsigned int vtx_fix_command(unsigned int cmd)
720static int saa5246a_ioctl(struct inode *inode, struct file *file, 948static int saa5246a_ioctl(struct inode *inode, struct file *file,
721 unsigned int cmd, unsigned long arg) 949 unsigned int cmd, unsigned long arg)
722{ 950{
723 struct video_device *vd = video_devdata(file); 951 struct saa5246a_device *t = video_drvdata(file);
724 struct saa5246a_device *t = vd->priv;
725 int err; 952 int err;
726 953
727 cmd = vtx_fix_command(cmd); 954 cmd = vtx_fix_command(cmd);
@@ -733,21 +960,15 @@ static int saa5246a_ioctl(struct inode *inode, struct file *file,
733 960
734static int saa5246a_open(struct inode *inode, struct file *file) 961static int saa5246a_open(struct inode *inode, struct file *file)
735{ 962{
736 struct video_device *vd = video_devdata(file); 963 struct saa5246a_device *t = video_drvdata(file);
737 struct saa5246a_device *t = vd->priv;
738 int err;
739 964
740 err = video_exclusive_open(inode,file); 965 if (t->client == NULL)
741 if (err < 0) 966 return -ENODEV;
742 return err;
743 967
744 if (t->client==NULL) { 968 if (test_and_set_bit(0, &t->in_use))
745 err = -ENODEV; 969 return -EBUSY;
746 goto fail;
747 }
748 970
749 if (i2c_senddata(t, SAA5246A_REGISTER_R0, 971 if (i2c_senddata(t, SAA5246A_REGISTER_R0,
750
751 R0_SELECT_R11 | 972 R0_SELECT_R11 |
752 R0_PLL_TIME_CONSTANT_LONG | 973 R0_PLL_TIME_CONSTANT_LONG |
753 R0_ENABLE_nODD_EVEN_OUTPUT | 974 R0_ENABLE_nODD_EVEN_OUTPUT |
@@ -773,21 +994,15 @@ static int saa5246a_open(struct inode *inode, struct file *file)
773 994
774 COMMAND_END)) 995 COMMAND_END))
775 { 996 {
776 err = -EIO; 997 clear_bit(0, &t->in_use);
777 goto fail; 998 return -EIO;
778 } 999 }
779
780 return 0; 1000 return 0;
781
782fail:
783 video_exclusive_release(inode,file);
784 return err;
785} 1001}
786 1002
787static int saa5246a_release(struct inode *inode, struct file *file) 1003static int saa5246a_release(struct inode *inode, struct file *file)
788{ 1004{
789 struct video_device *vd = video_devdata(file); 1005 struct saa5246a_device *t = video_drvdata(file);
790 struct saa5246a_device *t = vd->priv;
791 1006
792 /* Stop all acquisition circuits. */ 1007 /* Stop all acquisition circuits. */
793 i2c_senddata(t, SAA5246A_REGISTER_R1, 1008 i2c_senddata(t, SAA5246A_REGISTER_R1,
@@ -800,26 +1015,10 @@ static int saa5246a_release(struct inode *inode, struct file *file)
800 R1_VCS_TO_SCS, 1015 R1_VCS_TO_SCS,
801 1016
802 COMMAND_END); 1017 COMMAND_END);
803 video_exclusive_release(inode,file); 1018 clear_bit(0, &t->in_use);
804 return 0; 1019 return 0;
805} 1020}
806 1021
807static int __init init_saa_5246a (void)
808{
809 printk(KERN_INFO
810 "SAA5246A (or compatible) Teletext decoder driver version %d.%d\n",
811 MAJOR_VERSION, MINOR_VERSION);
812 return i2c_add_driver(&i2c_driver_videotext);
813}
814
815static void __exit cleanup_saa_5246a (void)
816{
817 i2c_del_driver(&i2c_driver_videotext);
818}
819
820module_init(init_saa_5246a);
821module_exit(cleanup_saa_5246a);
822
823static const struct file_operations saa_fops = { 1022static const struct file_operations saa_fops = {
824 .owner = THIS_MODULE, 1023 .owner = THIS_MODULE,
825 .open = saa5246a_open, 1024 .open = saa5246a_open,
@@ -830,8 +1029,79 @@ static const struct file_operations saa_fops = {
830 1029
831static struct video_device saa_template = 1030static struct video_device saa_template =
832{ 1031{
833 .name = IF_NAME, 1032 .name = "saa5246a",
834 .fops = &saa_fops, 1033 .fops = &saa_fops,
835 .release = video_device_release, 1034 .release = video_device_release,
836 .minor = -1, 1035 .minor = -1,
837}; 1036};
1037
1038/* Addresses to scan */
1039static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
1040
1041I2C_CLIENT_INSMOD;
1042
1043static int saa5246a_probe(struct i2c_client *client,
1044 const struct i2c_device_id *id)
1045{
1046 int pgbuf;
1047 int err;
1048 struct video_device *vd;
1049 struct saa5246a_device *t;
1050
1051 v4l_info(client, "chip found @ 0x%x (%s)\n",
1052 client->addr << 1, client->adapter->name);
1053 v4l_info(client, "VideoText version %d.%d\n",
1054 MAJOR_VERSION, MINOR_VERSION);
1055 t = kzalloc(sizeof(*t), GFP_KERNEL);
1056 if (t == NULL)
1057 return -ENOMEM;
1058 mutex_init(&t->lock);
1059
1060 /* Now create a video4linux device */
1061 vd = video_device_alloc();
1062 if (vd == NULL) {
1063 kfree(t);
1064 return -ENOMEM;
1065 }
1066 i2c_set_clientdata(client, vd);
1067 memcpy(vd, &saa_template, sizeof(*vd));
1068
1069 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
1070 memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
1071 t->is_searching[pgbuf] = false;
1072 }
1073 video_set_drvdata(vd, t);
1074
1075 /* Register it */
1076 err = video_register_device(vd, VFL_TYPE_VTX, -1);
1077 if (err < 0) {
1078 kfree(t);
1079 video_device_release(vd);
1080 return err;
1081 }
1082 t->client = client;
1083 return 0;
1084}
1085
1086static int saa5246a_remove(struct i2c_client *client)
1087{
1088 struct video_device *vd = i2c_get_clientdata(client);
1089
1090 video_unregister_device(vd);
1091 kfree(video_get_drvdata(vd));
1092 return 0;
1093}
1094
1095static const struct i2c_device_id saa5246a_id[] = {
1096 { "saa5246a", 0 },
1097 { }
1098};
1099MODULE_DEVICE_TABLE(i2c, saa5246a_id);
1100
1101static struct v4l2_i2c_driver_data v4l2_i2c_data = {
1102 .name = "saa5246a",
1103 .driverid = I2C_DRIVERID_SAA5249,
1104 .probe = saa5246a_probe,
1105 .remove = saa5246a_remove,
1106 .id_table = saa5246a_id,
1107};
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 07:41:37 -0500