1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
|
// SPDX-License-Identifier: GPL-2.0
// tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
//
// Copyright (c) 2006-2007 Mauro Carvalho Chehab <mchehab@kernel.org>
//
// Copyright (c) 2007 Michel Ludwig <michel.ludwig@gmail.com>
// - Fix SMBus Read Byte command
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include "tm6000.h"
#include "tm6000-regs.h"
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include "tuner-xc2028.h"
/* ----------------------------------------------------------- */
static unsigned int i2c_debug;
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
#define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \
printk(KERN_DEBUG "%s at %s: " fmt, \
dev->name, __func__, ##args); } while (0)
static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
__u8 reg, char *buf, int len)
{
int rc;
unsigned int i2c_packet_limit = 16;
if (dev->dev_type == TM6010)
i2c_packet_limit = 80;
if (!buf)
return -1;
if (len < 1 || len > i2c_packet_limit) {
printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
len, i2c_packet_limit);
return -1;
}
/* capture mutex */
rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
addr | reg << 8, 0, buf, len);
if (rc < 0) {
/* release mutex */
return rc;
}
/* release mutex */
return rc;
}
/* Generic read - doesn't work fine with 16bit registers */
static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
__u8 reg, char *buf, int len)
{
int rc;
u8 b[2];
unsigned int i2c_packet_limit = 16;
if (dev->dev_type == TM6010)
i2c_packet_limit = 64;
if (!buf)
return -1;
if (len < 1 || len > i2c_packet_limit) {
printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
len, i2c_packet_limit);
return -1;
}
/* capture mutex */
if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
/*
* Workaround an I2C bug when reading from zl10353
*/
reg -= 1;
len += 1;
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len);
*buf = b[1];
} else {
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
}
/* release mutex */
return rc;
}
/*
* read from a 16bit register
* for example xc2028, xc3028 or xc3028L
*/
static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
__u16 reg, char *buf, int len)
{
int rc;
unsigned char ureg;
if (!buf || len != 2)
return -1;
/* capture mutex */
if (dev->dev_type == TM6010) {
ureg = reg & 0xFF;
rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
addr | (reg & 0xFF00), 0, &ureg, 1);
if (rc < 0) {
/* release mutex */
return rc;
}
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
reg, 0, buf, len);
} else {
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
addr, reg, buf, len);
}
/* release mutex */
return rc;
}
static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msgs[], int num)
{
struct tm6000_core *dev = i2c_adap->algo_data;
int addr, rc, i, byte;
for (i = 0; i < num; i++) {
addr = (msgs[i].addr << 1) & 0xff;
i2c_dprintk(2, "%s %s addr=0x%x len=%d:",
(msgs[i].flags & I2C_M_RD) ? "read" : "write",
i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
if (msgs[i].flags & I2C_M_RD) {
/* read request without preceding register selection */
/*
* The TM6000 only supports a read transaction
* immediately after a 1 or 2 byte write to select
* a register. We cannot fulfil this request.
*/
i2c_dprintk(2, " read without preceding write not supported");
rc = -EOPNOTSUPP;
goto err;
} else if (i + 1 < num && msgs[i].len <= 2 &&
(msgs[i + 1].flags & I2C_M_RD) &&
msgs[i].addr == msgs[i + 1].addr) {
/* 1 or 2 byte write followed by a read */
if (i2c_debug >= 2)
for (byte = 0; byte < msgs[i].len; byte++)
printk(KERN_CONT " %02x", msgs[i].buf[byte]);
i2c_dprintk(2, "; joined to read %s len=%d:",
i == num - 2 ? "stop" : "nonstop",
msgs[i + 1].len);
if (msgs[i].len == 2) {
rc = tm6000_i2c_recv_regs16(dev, addr,
msgs[i].buf[0] << 8 | msgs[i].buf[1],
msgs[i + 1].buf, msgs[i + 1].len);
} else {
rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
msgs[i + 1].buf, msgs[i + 1].len);
}
i++;
if (addr == dev->tuner_addr << 1) {
tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
}
if (i2c_debug >= 2)
for (byte = 0; byte < msgs[i].len; byte++)
printk(KERN_CONT " %02x", msgs[i].buf[byte]);
} else {
/* write bytes */
if (i2c_debug >= 2)
for (byte = 0; byte < msgs[i].len; byte++)
printk(KERN_CONT " %02x", msgs[i].buf[byte]);
rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
msgs[i].buf + 1, msgs[i].len - 1);
}
if (i2c_debug >= 2)
printk(KERN_CONT "\n");
if (rc < 0)
goto err;
}
return num;
err:
i2c_dprintk(2, " ERROR: %i\n", rc);
return rc;
}
static int tm6000_i2c_eeprom(struct tm6000_core *dev)
{
int i, rc;
unsigned char *p = dev->eedata;
unsigned char bytes[17];
dev->i2c_client.addr = 0xa0 >> 1;
dev->eedata_size = 0;
bytes[16] = '\0';
for (i = 0; i < sizeof(dev->eedata); ) {
*p = i;
rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
if (rc < 1) {
if (p == dev->eedata)
goto noeeprom;
else {
printk(KERN_WARNING
"%s: i2c eeprom read error (err=%d)\n",
dev->name, rc);
}
return -EINVAL;
}
dev->eedata_size++;
p++;
if (0 == (i % 16))
printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
printk(KERN_CONT " %02x", dev->eedata[i]);
if ((dev->eedata[i] >= ' ') && (dev->eedata[i] <= 'z'))
bytes[i%16] = dev->eedata[i];
else
bytes[i%16] = '.';
i++;
if (0 == (i % 16)) {
bytes[16] = '\0';
printk(KERN_CONT " %s\n", bytes);
}
}
if (0 != (i%16)) {
bytes[i%16] = '\0';
for (i %= 16; i < 16; i++)
printk(KERN_CONT " ");
printk(KERN_CONT " %s\n", bytes);
}
return 0;
noeeprom:
printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
dev->name, rc);
return -EINVAL;
}
/* ----------------------------------------------------------- */
/*
* functionality()
*/
static u32 functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm tm6000_algo = {
.master_xfer = tm6000_i2c_xfer,
.functionality = functionality,
};
/* ----------------------------------------------------------- */
/*
* tm6000_i2c_register()
* register i2c bus
*/
int tm6000_i2c_register(struct tm6000_core *dev)
{
int rc;
dev->i2c_adap.owner = THIS_MODULE;
dev->i2c_adap.algo = &tm6000_algo;
dev->i2c_adap.dev.parent = &dev->udev->dev;
strlcpy(dev->i2c_adap.name, dev->name, sizeof(dev->i2c_adap.name));
dev->i2c_adap.algo_data = dev;
i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
rc = i2c_add_adapter(&dev->i2c_adap);
if (rc)
return rc;
dev->i2c_client.adapter = &dev->i2c_adap;
strlcpy(dev->i2c_client.name, "tm6000 internal", I2C_NAME_SIZE);
tm6000_i2c_eeprom(dev);
return 0;
}
/*
* tm6000_i2c_unregister()
* unregister i2c_bus
*/
int tm6000_i2c_unregister(struct tm6000_core *dev)
{
i2c_del_adapter(&dev->i2c_adap);
return 0;
}
|
