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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / staging / tm6000 / tm6000-i2c.c
blobc69808e460e01ed8c8ef75b1bca2e57ec75dd83b
1 /*
2 tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
3
4 Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
5
6 Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
7 - Fix SMBus Read Byte command
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation version 2
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/usb.h>
26 #include <linux/i2c.h>
27
28 #include "tm6000.h"
29 #include "tm6000-regs.h"
30 #include <media/v4l2-common.h>
31 #include <media/tuner.h>
32 #include "tuner-xc2028.h"
33
34
35 #define I2C_HW_B_TM6000 I2C_HW_B_EM28XX
36 /* ----------------------------------------------------------- */
37
38 static unsigned int i2c_debug = 0;
39 module_param(i2c_debug, int, 0644);
40 MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
41
42 #define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \
43 printk(KERN_DEBUG "%s at %s: " fmt, \
44 dev->name, __FUNCTION__ , ##args); } while (0)
45
46 static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
47 __u8 reg, char *buf, int len)
48 {
49 int rc;
50 unsigned int tsleep;
51 unsigned int i2c_packet_limit = 16;
52
53 if (dev->dev_type == TM6010)
54 i2c_packet_limit = 64;
55
56 if (!buf)
57 return -1;
58
59 if (len < 1 || len > i2c_packet_limit) {
60 printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
61 len, i2c_packet_limit);
62 return -1;
63 }
64
65 /* capture mutex */
66 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
67 USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
68 addr | reg << 8, 0, buf, len);
69
70 if (rc < 0) {
71 /* release mutex */
72 return rc;
73 }
74
75 /* Calculate delay time, 14000us for 64 bytes */
76 tsleep = ((len * 200) + 200 + 1000) / 1000;
77 msleep(tsleep);
78
79 /* release mutex */
80 return rc;
81 }
82
83 /* Generic read - doesn't work fine with 16bit registers */
84 static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
85 __u8 reg, char *buf, int len)
86 {
87 int rc;
88 u8 b[2];
89 unsigned int i2c_packet_limit = 16;
90
91 if (dev->dev_type == TM6010)
92 i2c_packet_limit = 64;
93
94 if (!buf)
95 return -1;
96
97 if (len < 1 || len > i2c_packet_limit) {
98 printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
99 len, i2c_packet_limit);
100 return -1;
101 }
102
103 /* capture mutex */
104 if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
105 reg -= 1;
106 len += 1;
107
108 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
109 REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len);
110
111 *buf = b[1];
112 } else {
113 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
114 REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
115 }
116
117 /* release mutex */
118 return rc;
119 }
120
121 /*
122 * read from a 16bit register
123 * for example xc2028, xc3028 or xc3028L
124 */
125 static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
126 __u16 reg, char *buf, int len)
127 {
128 int rc;
129 unsigned char ureg;
130
131 if (!buf || len != 2)
132 return -1;
133
134 /* capture mutex */
135 if (dev->dev_type == TM6010) {
136 ureg = reg & 0xFF;
137 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
138 USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
139 addr | (reg & 0xFF00), 0, &ureg, 1);
140
141 if (rc < 0) {
142 /* release mutex */
143 return rc;
144 }
145
146 msleep(1400 / 1000);
147 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
148 USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
149 reg, 0, buf, len);
150 } else {
151 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
152 USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
153 addr, reg, buf, len);
154 }
155
156 /* release mutex */
157 return rc;
158 }
159
160 static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
161 struct i2c_msg msgs[], int num)
162 {
163 struct tm6000_core *dev = i2c_adap->algo_data;
164 int addr, rc, i, byte;
165
166 if (num <= 0)
167 return 0;
168 for (i = 0; i < num; i++) {
169 addr = (msgs[i].addr << 1) & 0xff;
170 i2c_dprintk(2, "%s %s addr=0x%x len=%d:",
171 (msgs[i].flags & I2C_M_RD) ? "read" : "write",
172 i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
173 if (msgs[i].flags & I2C_M_RD) {
174 /* read request without preceding register selection */
175 /*
176 * The TM6000 only supports a read transaction
177 * immediately after a 1 or 2 byte write to select
178 * a register. We cannot fulfil this request.
179 */
180 i2c_dprintk(2, " read without preceding write not"
181 " supported");
182 rc = -EOPNOTSUPP;
183 goto err;
184 } else if (i + 1 < num && msgs[i].len <= 2 &&
185 (msgs[i + 1].flags & I2C_M_RD) &&
186 msgs[i].addr == msgs[i + 1].addr) {
187 /* 1 or 2 byte write followed by a read */
188 if (i2c_debug >= 2)
189 for (byte = 0; byte < msgs[i].len; byte++)
190 printk(" %02x", msgs[i].buf[byte]);
191 i2c_dprintk(2, "; joined to read %s len=%d:",
192 i == num - 2 ? "stop" : "nonstop",
193 msgs[i + 1].len);
194
195 if (msgs[i].len == 2) {
196 rc = tm6000_i2c_recv_regs16(dev, addr,
197 msgs[i].buf[0] << 8 | msgs[i].buf[1],
198 msgs[i + 1].buf, msgs[i + 1].len);
199 } else {
200 rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
201 msgs[i + 1].buf, msgs[i + 1].len);
202 }
203
204 i++;
205
206 if (addr == dev->tuner_addr << 1) {
207 tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
208 tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
209 }
210 if (i2c_debug >= 2)
211 for (byte = 0; byte < msgs[i].len; byte++)
212 printk(" %02x", msgs[i].buf[byte]);
213 } else {
214 /* write bytes */
215 if (i2c_debug >= 2)
216 for (byte = 0; byte < msgs[i].len; byte++)
217 printk(" %02x", msgs[i].buf[byte]);
218 rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
219 msgs[i].buf + 1, msgs[i].len - 1);
220
221 if (addr == dev->tuner_addr << 1) {
222 tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
223 tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
224 }
225 }
226 if (i2c_debug >= 2)
227 printk("\n");
228 if (rc < 0)
229 goto err;
230 }
231
232 return num;
233 err:
234 i2c_dprintk(2, " ERROR: %i\n", rc);
235 return rc;
236 }
237
238 static int tm6000_i2c_eeprom(struct tm6000_core *dev,
239 unsigned char *eedata, int len)
240 {
241 int i, rc;
242 unsigned char *p = eedata;
243 unsigned char bytes[17];
244
245 dev->i2c_client.addr = 0xa0 >> 1;
246
247 bytes[16] = '\0';
248 for (i = 0; i < len; ) {
249 *p = i;
250 rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
251 if (rc < 1) {
252 if (p == eedata)
253 goto noeeprom;
254 else {
255 printk(KERN_WARNING
256 "%s: i2c eeprom read error (err=%d)\n",
257 dev->name, rc);
258 }
259 return -1;
260 }
261 p++;
262 if (0 == (i % 16))
263 printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
264 printk(" %02x", eedata[i]);
265 if ((eedata[i] >= ' ') && (eedata[i] <= 'z'))
266 bytes[i%16] = eedata[i];
267 else
268 bytes[i%16] = '.';
269
270 i++;
271
272 if (0 == (i % 16)) {
273 bytes[16] = '\0';
274 printk(" %s\n", bytes);
275 }
276 }
277 if (0 != (i%16)) {
278 bytes[i%16] = '\0';
279 for (i %= 16; i < 16; i++)
280 printk(" ");
281 }
282 printk(" %s\n", bytes);
283
284 return 0;
285
286 noeeprom:
287 printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
288 dev->name, rc);
289 return rc;
290 }
291
292 /* ----------------------------------------------------------- */
293
294 /*
295 * functionality()
296 */
297 static u32 functionality(struct i2c_adapter *adap)
298 {
299 return I2C_FUNC_SMBUS_EMUL;
300 }
301
302 #define mass_write(addr, reg, data...) \
303 { static const u8 _val[] = data; \
304 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR, \
305 REQ_16_SET_GET_I2C_WR1_RDN, (reg<<8)+addr, 0x00, (u8 *) _val, \
306 ARRAY_SIZE(_val)); \
307 if (rc < 0) { \
308 printk(KERN_ERR "Error on line %d: %d\n", __LINE__, rc); \
309 return rc; \
310 } \
311 msleep(10); \
312 }
313
314 static struct i2c_algorithm tm6000_algo = {
315 .master_xfer = tm6000_i2c_xfer,
316 .functionality = functionality,
317 };
318
319 static struct i2c_adapter tm6000_adap_template = {
320 .owner = THIS_MODULE,
321 .class = I2C_CLASS_TV_ANALOG | I2C_CLASS_TV_DIGITAL,
322 .name = "tm6000",
323 .id = I2C_HW_B_TM6000,
324 .algo = &tm6000_algo,
325 };
326
327 static struct i2c_client tm6000_client_template = {
328 .name = "tm6000 internal",
329 };
330
331 /* ----------------------------------------------------------- */
332
333 /*
334 * tm6000_i2c_register()
335 * register i2c bus
336 */
337 int tm6000_i2c_register(struct tm6000_core *dev)
338 {
339 unsigned char eedata[256];
340
341 dev->i2c_adap = tm6000_adap_template;
342 dev->i2c_adap.dev.parent = &dev->udev->dev;
343 strcpy(dev->i2c_adap.name, dev->name);
344 dev->i2c_adap.algo_data = dev;
345 i2c_add_adapter(&dev->i2c_adap);
346
347 dev->i2c_client = tm6000_client_template;
348 dev->i2c_client.adapter = &dev->i2c_adap;
349
350 i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
351
352 tm6000_i2c_eeprom(dev, eedata, sizeof(eedata));
353
354 return 0;
355 }
356
357 /*
358 * tm6000_i2c_unregister()
359 * unregister i2c_bus
360 */
361 int tm6000_i2c_unregister(struct tm6000_core *dev)
362 {
363 i2c_del_adapter(&dev->i2c_adap);
364 return 0;
365 }
Tomato firmware and modifications.