Commit | Line | Data |
---|---|---|
9701dc94 | 1 | /* |
d0058645 RP |
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. | |
9701dc94 MCC |
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 | ||
9701dc94 MCC |
35 | /* ----------------------------------------------------------- */ |
36 | ||
d7fe4a60 | 37 | static unsigned int i2c_debug; |
9701dc94 MCC |
38 | module_param(i2c_debug, int, 0644); |
39 | MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); | |
40 | ||
52e0a72a | 41 | #define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \ |
9701dc94 | 42 | printk(KERN_DEBUG "%s at %s: " fmt, \ |
0f063c68 | 43 | dev->name, __func__, ##args); } while (0) |
9701dc94 | 44 | |
4e11502d SR |
45 | static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr, |
46 | __u8 reg, char *buf, int len) | |
47 | { | |
20dead8d | 48 | int rc; |
20dead8d DB |
49 | unsigned int i2c_packet_limit = 16; |
50 | ||
51 | if (dev->dev_type == TM6010) | |
3874cd77 | 52 | i2c_packet_limit = 80; |
20dead8d DB |
53 | |
54 | if (!buf) | |
55 | return -1; | |
56 | ||
57 | if (len < 1 || len > i2c_packet_limit) { | |
58 | printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n", | |
59 | len, i2c_packet_limit); | |
60 | return -1; | |
61 | } | |
62 | ||
63 | /* capture mutex */ | |
64 | rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR | | |
65 | USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN, | |
66 | addr | reg << 8, 0, buf, len); | |
67 | ||
68 | if (rc < 0) { | |
69 | /* release mutex */ | |
70 | return rc; | |
71 | } | |
72 | ||
20dead8d DB |
73 | /* release mutex */ |
74 | return rc; | |
4e11502d SR |
75 | } |
76 | ||
77 | /* Generic read - doesn't work fine with 16bit registers */ | |
78 | static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr, | |
79 | __u8 reg, char *buf, int len) | |
80 | { | |
81 | int rc; | |
02512fe3 | 82 | u8 b[2]; |
20dead8d DB |
83 | unsigned int i2c_packet_limit = 16; |
84 | ||
85 | if (dev->dev_type == TM6010) | |
86 | i2c_packet_limit = 64; | |
87 | ||
88 | if (!buf) | |
89 | return -1; | |
90 | ||
91 | if (len < 1 || len > i2c_packet_limit) { | |
92 | printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n", | |
93 | len, i2c_packet_limit); | |
94 | return -1; | |
95 | } | |
4e11502d | 96 | |
20dead8d | 97 | /* capture mutex */ |
02512fe3 SR |
98 | if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) { |
99 | /* | |
100 | * Workaround an I2C bug when reading from zl10353 | |
101 | */ | |
102 | reg -= 1; | |
103 | len += 1; | |
104 | ||
105 | rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
106 | REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len); | |
107 | ||
108 | *buf = b[1]; | |
109 | } else { | |
110 | rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
4e11502d | 111 | REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len); |
02512fe3 | 112 | } |
4e11502d | 113 | |
20dead8d | 114 | /* release mutex */ |
4e11502d SR |
115 | return rc; |
116 | } | |
117 | ||
118 | /* | |
119 | * read from a 16bit register | |
120 | * for example xc2028, xc3028 or xc3028L | |
121 | */ | |
122 | static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr, | |
123 | __u16 reg, char *buf, int len) | |
124 | { | |
20dead8d DB |
125 | int rc; |
126 | unsigned char ureg; | |
127 | ||
128 | if (!buf || len != 2) | |
129 | return -1; | |
130 | ||
131 | /* capture mutex */ | |
132 | if (dev->dev_type == TM6010) { | |
133 | ureg = reg & 0xFF; | |
134 | rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR | | |
135 | USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN, | |
136 | addr | (reg & 0xFF00), 0, &ureg, 1); | |
137 | ||
138 | if (rc < 0) { | |
139 | /* release mutex */ | |
140 | return rc; | |
141 | } | |
142 | ||
20dead8d DB |
143 | rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | |
144 | USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ, | |
145 | reg, 0, buf, len); | |
146 | } else { | |
147 | rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | | |
148 | USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN, | |
149 | addr, reg, buf, len); | |
150 | } | |
151 | ||
152 | /* release mutex */ | |
153 | return rc; | |
4e11502d SR |
154 | } |
155 | ||
9701dc94 MCC |
156 | static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap, |
157 | struct i2c_msg msgs[], int num) | |
158 | { | |
159 | struct tm6000_core *dev = i2c_adap->algo_data; | |
160 | int addr, rc, i, byte; | |
161 | ||
162 | if (num <= 0) | |
163 | return 0; | |
164 | for (i = 0; i < num; i++) { | |
e30b9d6c | 165 | addr = (msgs[i].addr << 1) & 0xff; |
52e0a72a | 166 | i2c_dprintk(2, "%s %s addr=0x%x len=%d:", |
9701dc94 MCC |
167 | (msgs[i].flags & I2C_M_RD) ? "read" : "write", |
168 | i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len); | |
427f7fac | 169 | if (msgs[i].flags & I2C_M_RD) { |
e30b9d6c CP |
170 | /* read request without preceding register selection */ |
171 | /* | |
172 | * The TM6000 only supports a read transaction | |
173 | * immediately after a 1 or 2 byte write to select | |
174 | * a register. We cannot fulfil this request. | |
175 | */ | |
176 | i2c_dprintk(2, " read without preceding write not" | |
177 | " supported"); | |
178 | rc = -EOPNOTSUPP; | |
179 | goto err; | |
180 | } else if (i + 1 < num && msgs[i].len <= 2 && | |
181 | (msgs[i + 1].flags & I2C_M_RD) && | |
182 | msgs[i].addr == msgs[i + 1].addr) { | |
183 | /* 1 or 2 byte write followed by a read */ | |
184 | if (i2c_debug >= 2) | |
185 | for (byte = 0; byte < msgs[i].len; byte++) | |
45dbf0db | 186 | printk(KERN_CONT " %02x", msgs[i].buf[byte]); |
e30b9d6c CP |
187 | i2c_dprintk(2, "; joined to read %s len=%d:", |
188 | i == num - 2 ? "stop" : "nonstop", | |
189 | msgs[i + 1].len); | |
4e11502d SR |
190 | |
191 | if (msgs[i].len == 2) { | |
192 | rc = tm6000_i2c_recv_regs16(dev, addr, | |
193 | msgs[i].buf[0] << 8 | msgs[i].buf[1], | |
194 | msgs[i + 1].buf, msgs[i + 1].len); | |
195 | } else { | |
196 | rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0], | |
197 | msgs[i + 1].buf, msgs[i + 1].len); | |
198 | } | |
199 | ||
cf9e1509 | 200 | i++; |
20cabed4 | 201 | |
685b1229 | 202 | if (addr == dev->tuner_addr << 1) { |
f1434f4e SR |
203 | tm6000_set_reg(dev, REQ_50_SET_START, 0, 0); |
204 | tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0); | |
20cabed4 | 205 | } |
e30b9d6c CP |
206 | if (i2c_debug >= 2) |
207 | for (byte = 0; byte < msgs[i].len; byte++) | |
45dbf0db | 208 | printk(KERN_CONT " %02x", msgs[i].buf[byte]); |
9701dc94 MCC |
209 | } else { |
210 | /* write bytes */ | |
e30b9d6c | 211 | if (i2c_debug >= 2) |
9701dc94 | 212 | for (byte = 0; byte < msgs[i].len; byte++) |
45dbf0db | 213 | printk(KERN_CONT " %02x", msgs[i].buf[byte]); |
4e11502d | 214 | rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0], |
e30b9d6c | 215 | msgs[i].buf + 1, msgs[i].len - 1); |
9701dc94 | 216 | } |
e30b9d6c | 217 | if (i2c_debug >= 2) |
45dbf0db | 218 | printk(KERN_CONT "\n"); |
9701dc94 MCC |
219 | if (rc < 0) |
220 | goto err; | |
221 | } | |
222 | ||
223 | return num; | |
224 | err: | |
52e0a72a | 225 | i2c_dprintk(2, " ERROR: %i\n", rc); |
9701dc94 MCC |
226 | return rc; |
227 | } | |
228 | ||
792bc09a | 229 | static int tm6000_i2c_eeprom(struct tm6000_core *dev) |
9701dc94 MCC |
230 | { |
231 | int i, rc; | |
792bc09a | 232 | unsigned char *p = dev->eedata; |
9701dc94 MCC |
233 | unsigned char bytes[17]; |
234 | ||
235 | dev->i2c_client.addr = 0xa0 >> 1; | |
792bc09a | 236 | dev->eedata_size = 0; |
9701dc94 | 237 | |
d4e15bcd | 238 | bytes[16] = '\0'; |
792bc09a MCC |
239 | for (i = 0; i < sizeof(dev->eedata); ) { |
240 | *p = i; | |
241 | rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1); | |
d4e15bcd | 242 | if (rc < 1) { |
792bc09a | 243 | if (p == dev->eedata) |
d4e15bcd MCC |
244 | goto noeeprom; |
245 | else { | |
9701dc94 MCC |
246 | printk(KERN_WARNING |
247 | "%s: i2c eeprom read error (err=%d)\n", | |
248 | dev->name, rc); | |
249 | } | |
792bc09a | 250 | return -EINVAL; |
9701dc94 | 251 | } |
792bc09a | 252 | dev->eedata_size++; |
9701dc94 MCC |
253 | p++; |
254 | if (0 == (i % 16)) | |
255 | printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i); | |
45dbf0db | 256 | printk(KERN_CONT " %02x", dev->eedata[i]); |
792bc09a MCC |
257 | if ((dev->eedata[i] >= ' ') && (dev->eedata[i] <= 'z')) |
258 | bytes[i%16] = dev->eedata[i]; | |
52e0a72a TT |
259 | else |
260 | bytes[i%16] = '.'; | |
d4e15bcd MCC |
261 | |
262 | i++; | |
263 | ||
264 | if (0 == (i % 16)) { | |
265 | bytes[16] = '\0'; | |
45dbf0db | 266 | printk(KERN_CONT " %s\n", bytes); |
9701dc94 MCC |
267 | } |
268 | } | |
d4e15bcd MCC |
269 | if (0 != (i%16)) { |
270 | bytes[i%16] = '\0'; | |
271 | for (i %= 16; i < 16; i++) | |
45dbf0db MCC |
272 | printk(KERN_CONT " "); |
273 | printk(KERN_CONT " %s\n", bytes); | |
9701dc94 | 274 | } |
d4e15bcd | 275 | |
9701dc94 | 276 | return 0; |
d4e15bcd MCC |
277 | |
278 | noeeprom: | |
279 | printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n", | |
792bc09a MCC |
280 | dev->name, rc); |
281 | return -EINVAL; | |
9701dc94 MCC |
282 | } |
283 | ||
284 | /* ----------------------------------------------------------- */ | |
285 | ||
9701dc94 MCC |
286 | /* |
287 | * functionality() | |
288 | */ | |
289 | static u32 functionality(struct i2c_adapter *adap) | |
290 | { | |
291 | return I2C_FUNC_SMBUS_EMUL; | |
292 | } | |
293 | ||
7bd444ed | 294 | static const struct i2c_algorithm tm6000_algo = { |
9701dc94 | 295 | .master_xfer = tm6000_i2c_xfer, |
9701dc94 MCC |
296 | .functionality = functionality, |
297 | }; | |
298 | ||
9701dc94 MCC |
299 | /* ----------------------------------------------------------- */ |
300 | ||
9701dc94 MCC |
301 | /* |
302 | * tm6000_i2c_register() | |
303 | * register i2c bus | |
304 | */ | |
305 | int tm6000_i2c_register(struct tm6000_core *dev) | |
306 | { | |
7bd444ed | 307 | int rc; |
d4e15bcd | 308 | |
7bd444ed JD |
309 | dev->i2c_adap.owner = THIS_MODULE; |
310 | dev->i2c_adap.algo = &tm6000_algo; | |
9701dc94 | 311 | dev->i2c_adap.dev.parent = &dev->udev->dev; |
7bd444ed | 312 | strlcpy(dev->i2c_adap.name, dev->name, sizeof(dev->i2c_adap.name)); |
9701dc94 | 313 | dev->i2c_adap.algo_data = dev; |
7bd444ed JD |
314 | i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev); |
315 | rc = i2c_add_adapter(&dev->i2c_adap); | |
316 | if (rc) | |
317 | return rc; | |
9701dc94 | 318 | |
9701dc94 | 319 | dev->i2c_client.adapter = &dev->i2c_adap; |
7bd444ed | 320 | strlcpy(dev->i2c_client.name, "tm6000 internal", I2C_NAME_SIZE); |
792bc09a | 321 | tm6000_i2c_eeprom(dev); |
d4e15bcd | 322 | |
9701dc94 MCC |
323 | return 0; |
324 | } | |
325 | ||
326 | /* | |
327 | * tm6000_i2c_unregister() | |
328 | * unregister i2c_bus | |
329 | */ | |
330 | int tm6000_i2c_unregister(struct tm6000_core *dev) | |
331 | { | |
332 | i2c_del_adapter(&dev->i2c_adap); | |
333 | return 0; | |
334 | } |