Loading...
1/*
2 * Driver for the Auvitek AU0828 USB bridge
3 *
4 * Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
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#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/init.h>
25#include <linux/delay.h>
26#include <linux/io.h>
27
28#include "au0828.h"
29#include "media/tuner.h"
30#include <media/v4l2-common.h>
31
32static int i2c_scan;
33module_param(i2c_scan, int, 0444);
34MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
35
36#define I2C_WAIT_DELAY 25
37#define I2C_WAIT_RETRY 1000
38
39static inline int i2c_slave_did_write_ack(struct i2c_adapter *i2c_adap)
40{
41 struct au0828_dev *dev = i2c_adap->algo_data;
42 return au0828_read(dev, AU0828_I2C_STATUS_201) &
43 AU0828_I2C_STATUS_NO_WRITE_ACK ? 0 : 1;
44}
45
46static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap)
47{
48 struct au0828_dev *dev = i2c_adap->algo_data;
49 return au0828_read(dev, AU0828_I2C_STATUS_201) &
50 AU0828_I2C_STATUS_NO_READ_ACK ? 0 : 1;
51}
52
53static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
54{
55 int count;
56
57 for (count = 0; count < I2C_WAIT_RETRY; count++) {
58 if (!i2c_slave_did_read_ack(i2c_adap))
59 break;
60 udelay(I2C_WAIT_DELAY);
61 }
62
63 if (I2C_WAIT_RETRY == count)
64 return 0;
65
66 return 1;
67}
68
69static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap)
70{
71 struct au0828_dev *dev = i2c_adap->algo_data;
72 return au0828_read(dev, AU0828_I2C_STATUS_201) &
73 AU0828_I2C_STATUS_READ_DONE ? 0 : 1;
74}
75
76static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
77{
78 int count;
79
80 for (count = 0; count < I2C_WAIT_RETRY; count++) {
81 if (!i2c_is_read_busy(i2c_adap))
82 break;
83 udelay(I2C_WAIT_DELAY);
84 }
85
86 if (I2C_WAIT_RETRY == count)
87 return 0;
88
89 return 1;
90}
91
92static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap)
93{
94 struct au0828_dev *dev = i2c_adap->algo_data;
95 return au0828_read(dev, AU0828_I2C_STATUS_201) &
96 AU0828_I2C_STATUS_WRITE_DONE ? 1 : 0;
97}
98
99static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
100{
101 int count;
102
103 for (count = 0; count < I2C_WAIT_RETRY; count++) {
104 if (i2c_is_write_done(i2c_adap))
105 break;
106 udelay(I2C_WAIT_DELAY);
107 }
108
109 if (I2C_WAIT_RETRY == count)
110 return 0;
111
112 return 1;
113}
114
115static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
116{
117 struct au0828_dev *dev = i2c_adap->algo_data;
118 return au0828_read(dev, AU0828_I2C_STATUS_201) &
119 AU0828_I2C_STATUS_BUSY ? 1 : 0;
120}
121
122static int i2c_wait_done(struct i2c_adapter *i2c_adap)
123{
124 int count;
125
126 for (count = 0; count < I2C_WAIT_RETRY; count++) {
127 if (!i2c_is_busy(i2c_adap))
128 break;
129 udelay(I2C_WAIT_DELAY);
130 }
131
132 if (I2C_WAIT_RETRY == count)
133 return 0;
134
135 return 1;
136}
137
138/* FIXME: Implement join handling correctly */
139static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
140 const struct i2c_msg *msg, int joined_rlen)
141{
142 int i, strobe = 0;
143 struct au0828_dev *dev = i2c_adap->algo_data;
144
145 dprintk(4, "%s()\n", __func__);
146
147 au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
148
149 /* Set the I2C clock */
150 if (((dev->board.tuner_type == TUNER_XC5000) ||
151 (dev->board.tuner_type == TUNER_XC5000C)) &&
152 (dev->board.tuner_addr == msg->addr) &&
153 (msg->len == 64)) {
154 /* Hack to speed up firmware load. The xc5000 lets us do up
155 to 400 KHz when in firmware download mode */
156 au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
157 AU0828_I2C_CLK_250KHZ);
158 } else {
159 /* Use the i2c clock speed in the board configuration */
160 au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
161 dev->board.i2c_clk_divider);
162 }
163
164 /* Hardware needs 8 bit addresses */
165 au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
166
167 dprintk(4, "SEND: %02x\n", msg->addr);
168
169 /* Deal with i2c_scan */
170 if (msg->len == 0) {
171 /* The analog tuner detection code makes use of the SMBUS_QUICK
172 message (which involves a zero length i2c write). To avoid
173 checking the status register when we didn't strobe out any
174 actual bytes to the bus, just do a read check. This is
175 consistent with how I saw i2c device checking done in the
176 USB trace of the Windows driver */
177 au0828_write(dev, AU0828_I2C_TRIGGER_200,
178 AU0828_I2C_TRIGGER_READ);
179
180 if (!i2c_wait_done(i2c_adap))
181 return -EIO;
182
183 if (i2c_wait_read_ack(i2c_adap))
184 return -EIO;
185
186 return 0;
187 }
188
189 for (i = 0; i < msg->len;) {
190
191 dprintk(4, " %02x\n", msg->buf[i]);
192
193 au0828_write(dev, AU0828_I2C_WRITE_FIFO_205, msg->buf[i]);
194
195 strobe++;
196 i++;
197
198 if ((strobe >= 4) || (i >= msg->len)) {
199
200 /* Strobe the byte into the bus */
201 if (i < msg->len)
202 au0828_write(dev, AU0828_I2C_TRIGGER_200,
203 AU0828_I2C_TRIGGER_WRITE |
204 AU0828_I2C_TRIGGER_HOLD);
205 else
206 au0828_write(dev, AU0828_I2C_TRIGGER_200,
207 AU0828_I2C_TRIGGER_WRITE);
208
209 /* Reset strobe trigger */
210 strobe = 0;
211
212 if (!i2c_wait_write_done(i2c_adap))
213 return -EIO;
214
215 }
216
217 }
218 if (!i2c_wait_done(i2c_adap))
219 return -EIO;
220
221 dprintk(4, "\n");
222
223 return msg->len;
224}
225
226/* FIXME: Implement join handling correctly */
227static int i2c_readbytes(struct i2c_adapter *i2c_adap,
228 const struct i2c_msg *msg, int joined)
229{
230 struct au0828_dev *dev = i2c_adap->algo_data;
231 int i;
232
233 dprintk(4, "%s()\n", __func__);
234
235 au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
236
237 /* Set the I2C clock */
238 au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
239 dev->board.i2c_clk_divider);
240
241 /* Hardware needs 8 bit addresses */
242 au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
243
244 dprintk(4, " RECV:\n");
245
246 /* Deal with i2c_scan */
247 if (msg->len == 0) {
248 au0828_write(dev, AU0828_I2C_TRIGGER_200,
249 AU0828_I2C_TRIGGER_READ);
250
251 if (i2c_wait_read_ack(i2c_adap))
252 return -EIO;
253 return 0;
254 }
255
256 for (i = 0; i < msg->len;) {
257
258 i++;
259
260 if (i < msg->len)
261 au0828_write(dev, AU0828_I2C_TRIGGER_200,
262 AU0828_I2C_TRIGGER_READ |
263 AU0828_I2C_TRIGGER_HOLD);
264 else
265 au0828_write(dev, AU0828_I2C_TRIGGER_200,
266 AU0828_I2C_TRIGGER_READ);
267
268 if (!i2c_wait_read_done(i2c_adap))
269 return -EIO;
270
271 msg->buf[i-1] = au0828_read(dev, AU0828_I2C_READ_FIFO_209) &
272 0xff;
273
274 dprintk(4, " %02x\n", msg->buf[i-1]);
275 }
276 if (!i2c_wait_done(i2c_adap))
277 return -EIO;
278
279 dprintk(4, "\n");
280
281 return msg->len;
282}
283
284static int i2c_xfer(struct i2c_adapter *i2c_adap,
285 struct i2c_msg *msgs, int num)
286{
287 int i, retval = 0;
288
289 dprintk(4, "%s(num = %d)\n", __func__, num);
290
291 for (i = 0; i < num; i++) {
292 dprintk(4, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
293 __func__, num, msgs[i].addr, msgs[i].len);
294 if (msgs[i].flags & I2C_M_RD) {
295 /* read */
296 retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
297 } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
298 msgs[i].addr == msgs[i + 1].addr) {
299 /* write then read from same address */
300 retval = i2c_sendbytes(i2c_adap, &msgs[i],
301 msgs[i + 1].len);
302 if (retval < 0)
303 goto err;
304 i++;
305 retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
306 } else {
307 /* write */
308 retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
309 }
310 if (retval < 0)
311 goto err;
312 }
313 return num;
314
315err:
316 return retval;
317}
318
319static u32 au0828_functionality(struct i2c_adapter *adap)
320{
321 return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
322}
323
324static struct i2c_algorithm au0828_i2c_algo_template = {
325 .master_xfer = i2c_xfer,
326 .functionality = au0828_functionality,
327};
328
329/* ----------------------------------------------------------------------- */
330
331static struct i2c_adapter au0828_i2c_adap_template = {
332 .name = DRIVER_NAME,
333 .owner = THIS_MODULE,
334 .algo = &au0828_i2c_algo_template,
335};
336
337static struct i2c_client au0828_i2c_client_template = {
338 .name = "au0828 internal",
339};
340
341static char *i2c_devs[128] = {
342 [0x8e >> 1] = "au8522",
343 [0xa0 >> 1] = "eeprom",
344 [0xc2 >> 1] = "tuner/xc5000",
345};
346
347static void do_i2c_scan(char *name, struct i2c_client *c)
348{
349 unsigned char buf;
350 int i, rc;
351
352 for (i = 0; i < 128; i++) {
353 c->addr = i;
354 rc = i2c_master_recv(c, &buf, 0);
355 if (rc < 0)
356 continue;
357 printk(KERN_INFO "%s: i2c scan: found device @ 0x%x [%s]\n",
358 name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
359 }
360}
361
362/* init + register i2c adapter */
363int au0828_i2c_register(struct au0828_dev *dev)
364{
365 dprintk(1, "%s()\n", __func__);
366
367 dev->i2c_adap = au0828_i2c_adap_template;
368 dev->i2c_algo = au0828_i2c_algo_template;
369 dev->i2c_client = au0828_i2c_client_template;
370
371 dev->i2c_adap.dev.parent = &dev->usbdev->dev;
372
373 strlcpy(dev->i2c_adap.name, DRIVER_NAME,
374 sizeof(dev->i2c_adap.name));
375
376 dev->i2c_adap.algo = &dev->i2c_algo;
377 dev->i2c_adap.algo_data = dev;
378#ifdef CONFIG_VIDEO_AU0828_V4L2
379 i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
380#else
381 i2c_set_adapdata(&dev->i2c_adap, dev);
382#endif
383 i2c_add_adapter(&dev->i2c_adap);
384
385 dev->i2c_client.adapter = &dev->i2c_adap;
386
387 if (0 == dev->i2c_rc) {
388 printk(KERN_INFO "%s: i2c bus registered\n", DRIVER_NAME);
389 if (i2c_scan)
390 do_i2c_scan(DRIVER_NAME, &dev->i2c_client);
391 } else
392 printk(KERN_INFO "%s: i2c bus register FAILED\n", DRIVER_NAME);
393
394 return dev->i2c_rc;
395}
396
397int au0828_i2c_unregister(struct au0828_dev *dev)
398{
399 i2c_del_adapter(&dev->i2c_adap);
400 return 0;
401}
402
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for the Auvitek AU0828 USB bridge
4 *
5 * Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
6 */
7
8#include "au0828.h"
9
10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/io.h>
15
16#include "media/tuner.h"
17#include <media/v4l2-common.h>
18
19static int i2c_scan;
20module_param(i2c_scan, int, 0444);
21MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
22
23#define I2C_WAIT_DELAY 25
24#define I2C_WAIT_RETRY 1000
25
26static inline int i2c_slave_did_write_ack(struct i2c_adapter *i2c_adap)
27{
28 struct au0828_dev *dev = i2c_adap->algo_data;
29 return au0828_read(dev, AU0828_I2C_STATUS_201) &
30 AU0828_I2C_STATUS_NO_WRITE_ACK ? 0 : 1;
31}
32
33static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap)
34{
35 struct au0828_dev *dev = i2c_adap->algo_data;
36 return au0828_read(dev, AU0828_I2C_STATUS_201) &
37 AU0828_I2C_STATUS_NO_READ_ACK ? 0 : 1;
38}
39
40static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
41{
42 int count;
43
44 for (count = 0; count < I2C_WAIT_RETRY; count++) {
45 if (!i2c_slave_did_read_ack(i2c_adap))
46 break;
47 udelay(I2C_WAIT_DELAY);
48 }
49
50 if (I2C_WAIT_RETRY == count)
51 return 0;
52
53 return 1;
54}
55
56static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap)
57{
58 struct au0828_dev *dev = i2c_adap->algo_data;
59 return au0828_read(dev, AU0828_I2C_STATUS_201) &
60 AU0828_I2C_STATUS_READ_DONE ? 0 : 1;
61}
62
63static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
64{
65 int count;
66
67 for (count = 0; count < I2C_WAIT_RETRY; count++) {
68 if (!i2c_is_read_busy(i2c_adap))
69 break;
70 udelay(I2C_WAIT_DELAY);
71 }
72
73 if (I2C_WAIT_RETRY == count)
74 return 0;
75
76 return 1;
77}
78
79static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap)
80{
81 struct au0828_dev *dev = i2c_adap->algo_data;
82 return au0828_read(dev, AU0828_I2C_STATUS_201) &
83 AU0828_I2C_STATUS_WRITE_DONE ? 1 : 0;
84}
85
86static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
87{
88 int count;
89
90 for (count = 0; count < I2C_WAIT_RETRY; count++) {
91 if (i2c_is_write_done(i2c_adap))
92 break;
93 udelay(I2C_WAIT_DELAY);
94 }
95
96 if (I2C_WAIT_RETRY == count)
97 return 0;
98
99 return 1;
100}
101
102static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
103{
104 struct au0828_dev *dev = i2c_adap->algo_data;
105 return au0828_read(dev, AU0828_I2C_STATUS_201) &
106 AU0828_I2C_STATUS_BUSY ? 1 : 0;
107}
108
109static int i2c_wait_done(struct i2c_adapter *i2c_adap)
110{
111 int count;
112
113 for (count = 0; count < I2C_WAIT_RETRY; count++) {
114 if (!i2c_is_busy(i2c_adap))
115 break;
116 udelay(I2C_WAIT_DELAY);
117 }
118
119 if (I2C_WAIT_RETRY == count)
120 return 0;
121
122 return 1;
123}
124
125/* FIXME: Implement join handling correctly */
126static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
127 const struct i2c_msg *msg, int joined_rlen)
128{
129 int i, strobe = 0;
130 struct au0828_dev *dev = i2c_adap->algo_data;
131 u8 i2c_speed = dev->board.i2c_clk_divider;
132
133 dprintk(4, "%s()\n", __func__);
134
135 au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
136
137 if (((dev->board.tuner_type == TUNER_XC5000) ||
138 (dev->board.tuner_type == TUNER_XC5000C)) &&
139 (dev->board.tuner_addr == msg->addr)) {
140 /*
141 * Due to I2C clock stretch, we need to use a lower speed
142 * on xc5000 for commands. However, firmware transfer can
143 * speed up to 400 KHz.
144 */
145 if (msg->len == 64)
146 i2c_speed = AU0828_I2C_CLK_250KHZ;
147 else
148 i2c_speed = AU0828_I2C_CLK_20KHZ;
149 }
150 /* Set the I2C clock */
151 au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202, i2c_speed);
152
153 /* Hardware needs 8 bit addresses */
154 au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
155
156 dprintk(4, "SEND: %02x\n", msg->addr);
157
158 /* Deal with i2c_scan */
159 if (msg->len == 0) {
160 /* The analog tuner detection code makes use of the SMBUS_QUICK
161 message (which involves a zero length i2c write). To avoid
162 checking the status register when we didn't strobe out any
163 actual bytes to the bus, just do a read check. This is
164 consistent with how I saw i2c device checking done in the
165 USB trace of the Windows driver */
166 au0828_write(dev, AU0828_I2C_TRIGGER_200,
167 AU0828_I2C_TRIGGER_READ);
168
169 if (!i2c_wait_done(i2c_adap))
170 return -EIO;
171
172 if (i2c_wait_read_ack(i2c_adap))
173 return -EIO;
174
175 return 0;
176 }
177
178 for (i = 0; i < msg->len;) {
179
180 dprintk(4, " %02x\n", msg->buf[i]);
181
182 au0828_write(dev, AU0828_I2C_WRITE_FIFO_205, msg->buf[i]);
183
184 strobe++;
185 i++;
186
187 if ((strobe >= 4) || (i >= msg->len)) {
188
189 /* Strobe the byte into the bus */
190 if (i < msg->len)
191 au0828_write(dev, AU0828_I2C_TRIGGER_200,
192 AU0828_I2C_TRIGGER_WRITE |
193 AU0828_I2C_TRIGGER_HOLD);
194 else
195 au0828_write(dev, AU0828_I2C_TRIGGER_200,
196 AU0828_I2C_TRIGGER_WRITE);
197
198 /* Reset strobe trigger */
199 strobe = 0;
200
201 if (!i2c_wait_write_done(i2c_adap))
202 return -EIO;
203
204 }
205
206 }
207 if (!i2c_wait_done(i2c_adap))
208 return -EIO;
209
210 dprintk(4, "\n");
211
212 return msg->len;
213}
214
215/* FIXME: Implement join handling correctly */
216static int i2c_readbytes(struct i2c_adapter *i2c_adap,
217 const struct i2c_msg *msg, int joined)
218{
219 struct au0828_dev *dev = i2c_adap->algo_data;
220 u8 i2c_speed = dev->board.i2c_clk_divider;
221 int i;
222
223 dprintk(4, "%s()\n", __func__);
224
225 au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
226
227 /*
228 * Due to xc5000c clock stretch, we cannot use full speed at
229 * readings from xc5000, as otherwise they'll fail.
230 */
231 if (((dev->board.tuner_type == TUNER_XC5000) ||
232 (dev->board.tuner_type == TUNER_XC5000C)) &&
233 (dev->board.tuner_addr == msg->addr))
234 i2c_speed = AU0828_I2C_CLK_20KHZ;
235
236 /* Set the I2C clock */
237 au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202, i2c_speed);
238
239 /* Hardware needs 8 bit addresses */
240 au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
241
242 dprintk(4, " RECV:\n");
243
244 /* Deal with i2c_scan */
245 if (msg->len == 0) {
246 au0828_write(dev, AU0828_I2C_TRIGGER_200,
247 AU0828_I2C_TRIGGER_READ);
248
249 if (i2c_wait_read_ack(i2c_adap))
250 return -EIO;
251 return 0;
252 }
253
254 for (i = 0; i < msg->len;) {
255
256 i++;
257
258 if (i < msg->len)
259 au0828_write(dev, AU0828_I2C_TRIGGER_200,
260 AU0828_I2C_TRIGGER_READ |
261 AU0828_I2C_TRIGGER_HOLD);
262 else
263 au0828_write(dev, AU0828_I2C_TRIGGER_200,
264 AU0828_I2C_TRIGGER_READ);
265
266 if (!i2c_wait_read_done(i2c_adap))
267 return -EIO;
268
269 msg->buf[i-1] = au0828_read(dev, AU0828_I2C_READ_FIFO_209) &
270 0xff;
271
272 dprintk(4, " %02x\n", msg->buf[i-1]);
273 }
274 if (!i2c_wait_done(i2c_adap))
275 return -EIO;
276
277 dprintk(4, "\n");
278
279 return msg->len;
280}
281
282static int i2c_xfer(struct i2c_adapter *i2c_adap,
283 struct i2c_msg *msgs, int num)
284{
285 int i, retval = 0;
286
287 dprintk(4, "%s(num = %d)\n", __func__, num);
288
289 for (i = 0; i < num; i++) {
290 dprintk(4, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
291 __func__, num, msgs[i].addr, msgs[i].len);
292 if (msgs[i].flags & I2C_M_RD) {
293 /* read */
294 retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
295 } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
296 msgs[i].addr == msgs[i + 1].addr) {
297 /* write then read from same address */
298 retval = i2c_sendbytes(i2c_adap, &msgs[i],
299 msgs[i + 1].len);
300 if (retval < 0)
301 goto err;
302 i++;
303 retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
304 } else {
305 /* write */
306 retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
307 }
308 if (retval < 0)
309 goto err;
310 }
311 return num;
312
313err:
314 return retval;
315}
316
317static u32 au0828_functionality(struct i2c_adapter *adap)
318{
319 return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
320}
321
322static const struct i2c_algorithm au0828_i2c_algo_template = {
323 .master_xfer = i2c_xfer,
324 .functionality = au0828_functionality,
325};
326
327/* ----------------------------------------------------------------------- */
328
329static const struct i2c_adapter au0828_i2c_adap_template = {
330 .name = KBUILD_MODNAME,
331 .owner = THIS_MODULE,
332 .algo = &au0828_i2c_algo_template,
333};
334
335static const struct i2c_client au0828_i2c_client_template = {
336 .name = "au0828 internal",
337};
338
339static char *i2c_devs[128] = {
340 [0x8e >> 1] = "au8522",
341 [0xa0 >> 1] = "eeprom",
342 [0xc2 >> 1] = "tuner/xc5000",
343};
344
345static void do_i2c_scan(char *name, struct i2c_client *c)
346{
347 unsigned char buf;
348 int i, rc;
349
350 for (i = 0; i < 128; i++) {
351 c->addr = i;
352 rc = i2c_master_recv(c, &buf, 0);
353 if (rc < 0)
354 continue;
355 pr_info("%s: i2c scan: found device @ 0x%x [%s]\n",
356 name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
357 }
358}
359
360/* init + register i2c adapter */
361int au0828_i2c_register(struct au0828_dev *dev)
362{
363 dprintk(1, "%s()\n", __func__);
364
365 dev->i2c_adap = au0828_i2c_adap_template;
366 dev->i2c_algo = au0828_i2c_algo_template;
367 dev->i2c_client = au0828_i2c_client_template;
368
369 dev->i2c_adap.dev.parent = &dev->usbdev->dev;
370
371 strscpy(dev->i2c_adap.name, KBUILD_MODNAME,
372 sizeof(dev->i2c_adap.name));
373
374 dev->i2c_adap.algo = &dev->i2c_algo;
375 dev->i2c_adap.algo_data = dev;
376#ifdef CONFIG_VIDEO_AU0828_V4L2
377 i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
378#else
379 i2c_set_adapdata(&dev->i2c_adap, dev);
380#endif
381 i2c_add_adapter(&dev->i2c_adap);
382
383 dev->i2c_client.adapter = &dev->i2c_adap;
384
385 if (0 == dev->i2c_rc) {
386 pr_info("i2c bus registered\n");
387 if (i2c_scan)
388 do_i2c_scan(KBUILD_MODNAME, &dev->i2c_client);
389 } else
390 pr_info("i2c bus register FAILED\n");
391
392 return dev->i2c_rc;
393}
394
395int au0828_i2c_unregister(struct au0828_dev *dev)
396{
397 i2c_del_adapter(&dev->i2c_adap);
398 return 0;
399}
400