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Commit | Line | Data |
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d19770e5 ST |
1 | /* |
2 | * Driver for the Conexant CX23885 PCIe bridge | |
3 | * | |
6d897616 | 4 | * Copyright (c) 2006 Steven Toth <stoth@linuxtv.org> |
d19770e5 ST |
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 <asm/io.h> | |
27 | ||
28 | #include "cx23885.h" | |
29 | ||
30 | #include <media/v4l2-common.h> | |
31 | ||
4513fc69 | 32 | static unsigned int i2c_debug; |
d19770e5 | 33 | module_param(i2c_debug, int, 0644); |
44a6481d | 34 | MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); |
d19770e5 | 35 | |
ff699e6b | 36 | static unsigned int i2c_scan; |
d19770e5 | 37 | module_param(i2c_scan, int, 0444); |
44a6481d | 38 | MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time"); |
d19770e5 | 39 | |
4513fc69 ST |
40 | #define dprintk(level, fmt, arg...)\ |
41 | do { if (i2c_debug >= level)\ | |
42 | printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\ | |
5e3c5967 | 43 | } while (0) |
d19770e5 ST |
44 | |
45 | #define I2C_WAIT_DELAY 32 | |
46 | #define I2C_WAIT_RETRY 64 | |
47 | ||
48 | #define I2C_EXTEND (1 << 3) | |
49 | #define I2C_NOSTOP (1 << 4) | |
50 | ||
51 | static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap) | |
52 | { | |
53 | struct cx23885_i2c *bus = i2c_adap->algo_data; | |
54 | struct cx23885_dev *dev = bus->dev; | |
55 | return cx_read(bus->reg_stat) & 0x01; | |
56 | } | |
57 | ||
58 | static inline int i2c_is_busy(struct i2c_adapter *i2c_adap) | |
59 | { | |
60 | struct cx23885_i2c *bus = i2c_adap->algo_data; | |
61 | struct cx23885_dev *dev = bus->dev; | |
62 | return cx_read(bus->reg_stat) & 0x02 ? 1 : 0; | |
63 | } | |
64 | ||
65 | static int i2c_wait_done(struct i2c_adapter *i2c_adap) | |
66 | { | |
67 | int count; | |
68 | ||
69 | for (count = 0; count < I2C_WAIT_RETRY; count++) { | |
70 | if (!i2c_is_busy(i2c_adap)) | |
71 | break; | |
72 | udelay(I2C_WAIT_DELAY); | |
73 | } | |
74 | ||
75 | if (I2C_WAIT_RETRY == count) | |
76 | return 0; | |
77 | ||
78 | return 1; | |
79 | } | |
80 | ||
44a6481d | 81 | static int i2c_sendbytes(struct i2c_adapter *i2c_adap, |
5e3c5967 | 82 | const struct i2c_msg *msg, int joined_rlen) |
d19770e5 ST |
83 | { |
84 | struct cx23885_i2c *bus = i2c_adap->algo_data; | |
85 | struct cx23885_dev *dev = bus->dev; | |
86 | u32 wdata, addr, ctrl; | |
87 | int retval, cnt; | |
88 | ||
5e3c5967 | 89 | if (joined_rlen) |
22b4e64f | 90 | dprintk(1, "%s(msg->wlen=%d, nextmsg->rlen=%d)\n", __func__, |
5e3c5967 CP |
91 | msg->len, joined_rlen); |
92 | else | |
22b4e64f | 93 | dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len); |
e92adc2c | 94 | |
d19770e5 ST |
95 | /* Deal with i2c probe functions with zero payload */ |
96 | if (msg->len == 0) { | |
97 | cx_write(bus->reg_addr, msg->addr << 25); | |
98 | cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2)); | |
99 | if (!i2c_wait_done(i2c_adap)) | |
100 | return -EIO; | |
101 | if (!i2c_slave_did_ack(i2c_adap)) | |
102 | return -EIO; | |
103 | ||
22b4e64f | 104 | dprintk(1, "%s() returns 0\n", __func__); |
d19770e5 ST |
105 | return 0; |
106 | } | |
107 | ||
108 | ||
109 | /* dev, reg + first byte */ | |
110 | addr = (msg->addr << 25) | msg->buf[0]; | |
111 | wdata = msg->buf[0]; | |
112 | ctrl = bus->i2c_period | (1 << 12) | (1 << 2); | |
113 | ||
114 | if (msg->len > 1) | |
115 | ctrl |= I2C_NOSTOP | I2C_EXTEND; | |
5e3c5967 CP |
116 | else if (joined_rlen) |
117 | ctrl |= I2C_NOSTOP; | |
d19770e5 ST |
118 | |
119 | cx_write(bus->reg_addr, addr); | |
120 | cx_write(bus->reg_wdata, wdata); | |
121 | cx_write(bus->reg_ctrl, ctrl); | |
122 | ||
123 | retval = i2c_wait_done(i2c_adap); | |
124 | if (retval < 0) | |
125 | goto err; | |
126 | if (retval == 0) | |
127 | goto eio; | |
128 | if (i2c_debug) { | |
129 | printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]); | |
130 | if (!(ctrl & I2C_NOSTOP)) | |
131 | printk(" >\n"); | |
132 | } | |
133 | ||
9c8ced51 | 134 | for (cnt = 1; cnt < msg->len; cnt++) { |
d19770e5 ST |
135 | /* following bytes */ |
136 | wdata = msg->buf[cnt]; | |
137 | ctrl = bus->i2c_period | (1 << 12) | (1 << 2); | |
138 | ||
e92adc2c | 139 | if (cnt < msg->len - 1) |
d19770e5 | 140 | ctrl |= I2C_NOSTOP | I2C_EXTEND; |
5e3c5967 CP |
141 | else if (joined_rlen) |
142 | ctrl |= I2C_NOSTOP; | |
d19770e5 | 143 | |
d19770e5 ST |
144 | cx_write(bus->reg_addr, addr); |
145 | cx_write(bus->reg_wdata, wdata); | |
146 | cx_write(bus->reg_ctrl, ctrl); | |
147 | ||
148 | retval = i2c_wait_done(i2c_adap); | |
149 | if (retval < 0) | |
150 | goto err; | |
151 | if (retval == 0) | |
152 | goto eio; | |
153 | if (i2c_debug) { | |
9c8ced51 | 154 | dprintk(1, " %02x", msg->buf[cnt]); |
d19770e5 | 155 | if (!(ctrl & I2C_NOSTOP)) |
9c8ced51 | 156 | dprintk(1, " >\n"); |
d19770e5 ST |
157 | } |
158 | } | |
159 | return msg->len; | |
160 | ||
161 | eio: | |
162 | retval = -EIO; | |
163 | err: | |
5e3c5967 | 164 | if (i2c_debug) |
9c8ced51 | 165 | printk(KERN_ERR " ERR: %d\n", retval); |
d19770e5 ST |
166 | return retval; |
167 | } | |
168 | ||
44a6481d | 169 | static int i2c_readbytes(struct i2c_adapter *i2c_adap, |
5e3c5967 | 170 | const struct i2c_msg *msg, int joined) |
d19770e5 ST |
171 | { |
172 | struct cx23885_i2c *bus = i2c_adap->algo_data; | |
173 | struct cx23885_dev *dev = bus->dev; | |
174 | u32 ctrl, cnt; | |
175 | int retval; | |
176 | ||
5e3c5967 CP |
177 | |
178 | if (i2c_debug && !joined) | |
22b4e64f | 179 | dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len); |
d19770e5 ST |
180 | |
181 | /* Deal with i2c probe functions with zero payload */ | |
182 | if (msg->len == 0) { | |
183 | cx_write(bus->reg_addr, msg->addr << 25); | |
184 | cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2) | 1); | |
185 | if (!i2c_wait_done(i2c_adap)) | |
186 | return -EIO; | |
187 | if (!i2c_slave_did_ack(i2c_adap)) | |
188 | return -EIO; | |
189 | ||
190 | ||
22b4e64f | 191 | dprintk(1, "%s() returns 0\n", __func__); |
d19770e5 ST |
192 | return 0; |
193 | } | |
194 | ||
5e3c5967 CP |
195 | if (i2c_debug) { |
196 | if (joined) | |
9c8ced51 | 197 | dprintk(1, " R"); |
5e3c5967 | 198 | else |
9c8ced51 | 199 | dprintk(1, " <R %02x", (msg->addr << 1) + 1); |
5e3c5967 | 200 | } |
e92adc2c | 201 | |
9c8ced51 | 202 | for (cnt = 0; cnt < msg->len; cnt++) { |
d19770e5 ST |
203 | |
204 | ctrl = bus->i2c_period | (1 << 12) | (1 << 2) | 1; | |
205 | ||
e92adc2c | 206 | if (cnt < msg->len - 1) |
d19770e5 ST |
207 | ctrl |= I2C_NOSTOP | I2C_EXTEND; |
208 | ||
209 | cx_write(bus->reg_addr, msg->addr << 25); | |
210 | cx_write(bus->reg_ctrl, ctrl); | |
211 | ||
212 | retval = i2c_wait_done(i2c_adap); | |
213 | if (retval < 0) | |
214 | goto err; | |
215 | if (retval == 0) | |
216 | goto eio; | |
217 | msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff; | |
218 | if (i2c_debug) { | |
9c8ced51 | 219 | dprintk(1, " %02x", msg->buf[cnt]); |
d19770e5 | 220 | if (!(ctrl & I2C_NOSTOP)) |
9c8ced51 | 221 | dprintk(1, " >\n"); |
d19770e5 ST |
222 | } |
223 | } | |
224 | return msg->len; | |
225 | ||
226 | eio: | |
227 | retval = -EIO; | |
228 | err: | |
5e3c5967 | 229 | if (i2c_debug) |
9c8ced51 | 230 | printk(KERN_ERR " ERR: %d\n", retval); |
d19770e5 ST |
231 | return retval; |
232 | } | |
233 | ||
44a6481d MK |
234 | static int i2c_xfer(struct i2c_adapter *i2c_adap, |
235 | struct i2c_msg *msgs, int num) | |
d19770e5 ST |
236 | { |
237 | struct cx23885_i2c *bus = i2c_adap->algo_data; | |
238 | struct cx23885_dev *dev = bus->dev; | |
239 | int i, retval = 0; | |
240 | ||
22b4e64f | 241 | dprintk(1, "%s(num = %d)\n", __func__, num); |
d19770e5 ST |
242 | |
243 | for (i = 0 ; i < num; i++) { | |
44a6481d | 244 | dprintk(1, "%s(num = %d) addr = 0x%02x len = 0x%x\n", |
22b4e64f | 245 | __func__, num, msgs[i].addr, msgs[i].len); |
d19770e5 ST |
246 | if (msgs[i].flags & I2C_M_RD) { |
247 | /* read */ | |
5e3c5967 CP |
248 | retval = i2c_readbytes(i2c_adap, &msgs[i], 0); |
249 | } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) && | |
250 | msgs[i].addr == msgs[i + 1].addr) { | |
251 | /* write then read from same address */ | |
252 | retval = i2c_sendbytes(i2c_adap, &msgs[i], | |
253 | msgs[i + 1].len); | |
d19770e5 ST |
254 | if (retval < 0) |
255 | goto err; | |
5e3c5967 CP |
256 | i++; |
257 | retval = i2c_readbytes(i2c_adap, &msgs[i], 1); | |
d19770e5 ST |
258 | } else { |
259 | /* write */ | |
5e3c5967 | 260 | retval = i2c_sendbytes(i2c_adap, &msgs[i], 0); |
d19770e5 | 261 | } |
5e3c5967 CP |
262 | if (retval < 0) |
263 | goto err; | |
d19770e5 ST |
264 | } |
265 | return num; | |
266 | ||
267 | err: | |
268 | return retval; | |
269 | } | |
270 | ||
d19770e5 ST |
271 | static u32 cx23885_functionality(struct i2c_adapter *adap) |
272 | { | |
0fc0739b | 273 | return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C; |
d19770e5 ST |
274 | } |
275 | ||
276 | static struct i2c_algorithm cx23885_i2c_algo_template = { | |
277 | .master_xfer = i2c_xfer, | |
d19770e5 ST |
278 | .functionality = cx23885_functionality, |
279 | }; | |
280 | ||
281 | /* ----------------------------------------------------------------------- */ | |
282 | ||
283 | static struct i2c_adapter cx23885_i2c_adap_template = { | |
284 | .name = "cx23885", | |
285 | .owner = THIS_MODULE, | |
286 | .id = I2C_HW_B_CX23885, | |
287 | .algo = &cx23885_i2c_algo_template, | |
d19770e5 ST |
288 | }; |
289 | ||
290 | static struct i2c_client cx23885_i2c_client_template = { | |
291 | .name = "cx23885 internal", | |
292 | }; | |
293 | ||
294 | static char *i2c_devs[128] = { | |
9c8ced51 ST |
295 | [0x10 >> 1] = "tda10048", |
296 | [0x12 >> 1] = "dib7000pc", | |
297 | [0x1c >> 1] = "lgdt3303", | |
298 | [0x86 >> 1] = "tda9887", | |
299 | [0x32 >> 1] = "cx24227", | |
300 | [0x88 >> 1] = "cx25837", | |
301 | [0x84 >> 1] = "tda8295", | |
302 | [0xa0 >> 1] = "eeprom", | |
303 | [0xc0 >> 1] = "tuner/mt2131/tda8275", | |
66762373 | 304 | [0xc2 >> 1] = "tuner/mt2131/tda8275/xc5000/xc3028", |
9c8ced51 | 305 | [0xc8 >> 1] = "tuner/xc3028L", |
d19770e5 ST |
306 | }; |
307 | ||
308 | static void do_i2c_scan(char *name, struct i2c_client *c) | |
309 | { | |
310 | unsigned char buf; | |
44a6481d | 311 | int i, rc; |
d19770e5 ST |
312 | |
313 | for (i = 0; i < 128; i++) { | |
314 | c->addr = i; | |
44a6481d | 315 | rc = i2c_master_recv(c, &buf, 0); |
d19770e5 ST |
316 | if (rc < 0) |
317 | continue; | |
9c8ced51 | 318 | printk(KERN_INFO "%s: i2c scan: found device @ 0x%x [%s]\n", |
d19770e5 ST |
319 | name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); |
320 | } | |
321 | } | |
322 | ||
323 | /* init + register i2c algo-bit adapter */ | |
324 | int cx23885_i2c_register(struct cx23885_i2c *bus) | |
325 | { | |
326 | struct cx23885_dev *dev = bus->dev; | |
327 | ||
22b4e64f | 328 | dprintk(1, "%s(bus = %d)\n", __func__, bus->nr); |
d19770e5 | 329 | |
44a6481d MK |
330 | memcpy(&bus->i2c_adap, &cx23885_i2c_adap_template, |
331 | sizeof(bus->i2c_adap)); | |
332 | memcpy(&bus->i2c_algo, &cx23885_i2c_algo_template, | |
333 | sizeof(bus->i2c_algo)); | |
334 | memcpy(&bus->i2c_client, &cx23885_i2c_client_template, | |
335 | sizeof(bus->i2c_client)); | |
d19770e5 ST |
336 | |
337 | bus->i2c_adap.dev.parent = &dev->pci->dev; | |
338 | ||
44a6481d MK |
339 | strlcpy(bus->i2c_adap.name, bus->dev->name, |
340 | sizeof(bus->i2c_adap.name)); | |
2e52f215 | 341 | |
d19770e5 ST |
342 | bus->i2c_algo.data = bus; |
343 | bus->i2c_adap.algo_data = bus; | |
c0714f6c | 344 | i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev); |
d19770e5 ST |
345 | i2c_add_adapter(&bus->i2c_adap); |
346 | ||
347 | bus->i2c_client.adapter = &bus->i2c_adap; | |
348 | ||
349 | if (0 == bus->i2c_rc) { | |
9c8ced51 | 350 | dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr); |
0d5a19f1 HV |
351 | if (i2c_scan) { |
352 | printk(KERN_INFO "%s: scan bus %d:\n", | |
353 | dev->name, bus->nr); | |
d19770e5 | 354 | do_i2c_scan(dev->name, &bus->i2c_client); |
0d5a19f1 | 355 | } |
d19770e5 | 356 | } else |
9c8ced51 ST |
357 | printk(KERN_WARNING "%s: i2c bus %d register FAILED\n", |
358 | dev->name, bus->nr); | |
d19770e5 | 359 | |
c668f32d JD |
360 | /* Instantiate the IR receiver device, if present */ |
361 | if (0 == bus->i2c_rc) { | |
362 | struct i2c_board_info info; | |
363 | const unsigned short addr_list[] = { | |
364 | 0x6b, I2C_CLIENT_END | |
365 | }; | |
366 | ||
367 | memset(&info, 0, sizeof(struct i2c_board_info)); | |
368 | strlcpy(info.type, "ir_video", I2C_NAME_SIZE); | |
369 | i2c_new_probed_device(&bus->i2c_adap, &info, addr_list); | |
370 | } | |
371 | ||
d19770e5 ST |
372 | return bus->i2c_rc; |
373 | } | |
374 | ||
375 | int cx23885_i2c_unregister(struct cx23885_i2c *bus) | |
376 | { | |
377 | i2c_del_adapter(&bus->i2c_adap); | |
378 | return 0; | |
379 | } | |
380 | ||
a589b665 ST |
381 | void cx23885_av_clk(struct cx23885_dev *dev, int enable) |
382 | { | |
383 | /* write 0 to bus 2 addr 0x144 via i2x_xfer() */ | |
384 | char buffer[3]; | |
385 | struct i2c_msg msg; | |
386 | dprintk(1, "%s(enabled = %d)\n", __func__, enable); | |
387 | ||
388 | /* Register 0x144 */ | |
389 | buffer[0] = 0x01; | |
390 | buffer[1] = 0x44; | |
391 | if (enable == 1) | |
392 | buffer[2] = 0x05; | |
393 | else | |
394 | buffer[2] = 0x00; | |
395 | ||
396 | msg.addr = 0x44; | |
397 | msg.flags = I2C_M_TEN; | |
398 | msg.len = 3; | |
399 | msg.buf = buffer; | |
400 | ||
401 | i2c_xfer(&dev->i2c_bus[2].i2c_adap, &msg, 1); | |
402 | } | |
403 | ||
d19770e5 ST |
404 | /* ----------------------------------------------------------------------- */ |
405 | ||
d19770e5 ST |
406 | /* |
407 | * Local variables: | |
408 | * c-basic-offset: 8 | |
409 | * End: | |
410 | */ |