Commit | Line | Data |
---|---|---|
1c1e45d1 HV |
1 | /* |
2 | * cx18 I2C functions | |
3 | * | |
4 | * Derived from ivtv-i2c.c | |
5 | * | |
6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
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., 59 Temple Place, Suite 330, Boston, MA | |
21 | * 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include "cx18-driver.h" | |
b1526421 | 25 | #include "cx18-io.h" |
1c1e45d1 HV |
26 | #include "cx18-cards.h" |
27 | #include "cx18-gpio.h" | |
28 | #include "cx18-av-core.h" | |
50510993 | 29 | #include "cx18-i2c.h" |
ced07371 | 30 | #include "cx18-irq.h" |
1c1e45d1 | 31 | |
1c1e45d1 HV |
32 | #define CX18_REG_I2C_1_WR 0xf15000 |
33 | #define CX18_REG_I2C_1_RD 0xf15008 | |
34 | #define CX18_REG_I2C_2_WR 0xf25100 | |
35 | #define CX18_REG_I2C_2_RD 0xf25108 | |
36 | ||
37 | #define SETSCL_BIT 0x0001 | |
38 | #define SETSDL_BIT 0x0002 | |
39 | #define GETSCL_BIT 0x0004 | |
40 | #define GETSDL_BIT 0x0008 | |
41 | ||
1c1e45d1 HV |
42 | #define CX18_CS5345_I2C_ADDR 0x4c |
43 | ||
44 | /* This array should match the CX18_HW_ defines */ | |
45 | static const u8 hw_driverids[] = { | |
46 | I2C_DRIVERID_TUNER, | |
47 | I2C_DRIVERID_TVEEPROM, | |
48 | I2C_DRIVERID_CS5345, | |
49 | 0, /* CX18_HW_GPIO dummy driver ID */ | |
50 | 0 /* CX18_HW_CX23418 dummy driver ID */ | |
51 | }; | |
52 | ||
53 | /* This array should match the CX18_HW_ defines */ | |
54 | static const u8 hw_addrs[] = { | |
55 | 0, | |
56 | 0, | |
57 | CX18_CS5345_I2C_ADDR, | |
58 | 0, /* CX18_HW_GPIO dummy driver ID */ | |
59 | 0, /* CX18_HW_CX23418 dummy driver ID */ | |
60 | }; | |
61 | ||
62 | /* This array should match the CX18_HW_ defines */ | |
63 | /* This might well become a card-specific array */ | |
64 | static const u8 hw_bus[] = { | |
65 | 0, | |
66 | 0, | |
67 | 0, | |
68 | 0, /* CX18_HW_GPIO dummy driver ID */ | |
69 | 0, /* CX18_HW_CX23418 dummy driver ID */ | |
70 | }; | |
71 | ||
72 | /* This array should match the CX18_HW_ defines */ | |
af294867 | 73 | static const char * const hw_devicenames[] = { |
1c1e45d1 HV |
74 | "tuner", |
75 | "tveeprom", | |
76 | "cs5345", | |
77 | "gpio", | |
78 | "cx23418", | |
79 | }; | |
80 | ||
81 | int cx18_i2c_register(struct cx18 *cx, unsigned idx) | |
82 | { | |
83 | struct i2c_board_info info; | |
84 | struct i2c_client *c; | |
85 | u8 id, bus; | |
86 | int i; | |
87 | ||
88 | CX18_DEBUG_I2C("i2c client register\n"); | |
89 | if (idx >= ARRAY_SIZE(hw_driverids) || hw_driverids[idx] == 0) | |
90 | return -1; | |
91 | id = hw_driverids[idx]; | |
92 | bus = hw_bus[idx]; | |
93 | memset(&info, 0, sizeof(info)); | |
af294867 | 94 | strlcpy(info.type, hw_devicenames[idx], sizeof(info.type)); |
1c1e45d1 HV |
95 | info.addr = hw_addrs[idx]; |
96 | for (i = 0; i < I2C_CLIENTS_MAX; i++) | |
97 | if (cx->i2c_clients[i] == NULL) | |
98 | break; | |
99 | ||
100 | if (i == I2C_CLIENTS_MAX) { | |
101 | CX18_ERR("insufficient room for new I2C client!\n"); | |
102 | return -ENOMEM; | |
103 | } | |
104 | ||
105 | if (id != I2C_DRIVERID_TUNER) { | |
106 | c = i2c_new_device(&cx->i2c_adap[bus], &info); | |
107 | if (c->driver == NULL) | |
108 | i2c_unregister_device(c); | |
109 | else | |
110 | cx->i2c_clients[i] = c; | |
111 | return cx->i2c_clients[i] ? 0 : -ENODEV; | |
112 | } | |
113 | ||
114 | /* special tuner handling */ | |
115 | c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->radio); | |
116 | if (c && c->driver == NULL) | |
117 | i2c_unregister_device(c); | |
118 | else if (c) | |
119 | cx->i2c_clients[i++] = c; | |
120 | c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->demod); | |
121 | if (c && c->driver == NULL) | |
122 | i2c_unregister_device(c); | |
123 | else if (c) | |
124 | cx->i2c_clients[i++] = c; | |
125 | c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->tv); | |
126 | if (c && c->driver == NULL) | |
127 | i2c_unregister_device(c); | |
128 | else if (c) | |
129 | cx->i2c_clients[i++] = c; | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int attach_inform(struct i2c_client *client) | |
134 | { | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int detach_inform(struct i2c_client *client) | |
139 | { | |
140 | int i; | |
141 | struct cx18 *cx = (struct cx18 *)i2c_get_adapdata(client->adapter); | |
142 | ||
143 | CX18_DEBUG_I2C("i2c client detach\n"); | |
144 | for (i = 0; i < I2C_CLIENTS_MAX; i++) { | |
145 | if (cx->i2c_clients[i] == client) { | |
146 | cx->i2c_clients[i] = NULL; | |
147 | break; | |
148 | } | |
149 | } | |
150 | CX18_DEBUG_I2C("i2c detach [client=%s,%s]\n", | |
151 | client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed"); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static void cx18_setscl(void *data, int state) | |
157 | { | |
158 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
159 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
160 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; | |
b1526421 | 161 | u32 r = cx18_read_reg(cx, addr); |
1c1e45d1 HV |
162 | |
163 | if (state) | |
b1526421 | 164 | cx18_write_reg_sync(cx, r | SETSCL_BIT, addr); |
1c1e45d1 | 165 | else |
b1526421 | 166 | cx18_write_reg_sync(cx, r & ~SETSCL_BIT, addr); |
1c1e45d1 HV |
167 | } |
168 | ||
169 | static void cx18_setsda(void *data, int state) | |
170 | { | |
171 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
172 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
173 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; | |
b1526421 | 174 | u32 r = cx18_read_reg(cx, addr); |
1c1e45d1 HV |
175 | |
176 | if (state) | |
b1526421 | 177 | cx18_write_reg_sync(cx, r | SETSDL_BIT, addr); |
1c1e45d1 | 178 | else |
b1526421 | 179 | cx18_write_reg_sync(cx, r & ~SETSDL_BIT, addr); |
1c1e45d1 HV |
180 | } |
181 | ||
182 | static int cx18_getscl(void *data) | |
183 | { | |
184 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
185 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
186 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; | |
187 | ||
b1526421 | 188 | return cx18_read_reg(cx, addr) & GETSCL_BIT; |
1c1e45d1 HV |
189 | } |
190 | ||
191 | static int cx18_getsda(void *data) | |
192 | { | |
193 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
194 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
195 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; | |
196 | ||
b1526421 | 197 | return cx18_read_reg(cx, addr) & GETSDL_BIT; |
1c1e45d1 HV |
198 | } |
199 | ||
200 | /* template for i2c-bit-algo */ | |
201 | static struct i2c_adapter cx18_i2c_adap_template = { | |
202 | .name = "cx18 i2c driver", | |
203 | .id = I2C_HW_B_CX2341X, | |
204 | .algo = NULL, /* set by i2c-algo-bit */ | |
205 | .algo_data = NULL, /* filled from template */ | |
206 | .client_register = attach_inform, | |
207 | .client_unregister = detach_inform, | |
208 | .owner = THIS_MODULE, | |
209 | }; | |
210 | ||
211 | #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ | |
212 | #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ | |
213 | ||
214 | static struct i2c_algo_bit_data cx18_i2c_algo_template = { | |
215 | .setsda = cx18_setsda, | |
216 | .setscl = cx18_setscl, | |
217 | .getsda = cx18_getsda, | |
218 | .getscl = cx18_getscl, | |
219 | .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ | |
220 | .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ | |
221 | }; | |
222 | ||
223 | static struct i2c_client cx18_i2c_client_template = { | |
224 | .name = "cx18 internal", | |
225 | }; | |
226 | ||
227 | int cx18_call_i2c_client(struct cx18 *cx, int addr, unsigned cmd, void *arg) | |
228 | { | |
229 | struct i2c_client *client; | |
230 | int retval; | |
231 | int i; | |
232 | ||
233 | CX18_DEBUG_I2C("call_i2c_client addr=%02x\n", addr); | |
234 | for (i = 0; i < I2C_CLIENTS_MAX; i++) { | |
235 | client = cx->i2c_clients[i]; | |
236 | if (client == NULL || client->driver == NULL || | |
237 | client->driver->command == NULL) | |
238 | continue; | |
239 | if (addr == client->addr) { | |
240 | retval = client->driver->command(client, cmd, arg); | |
241 | return retval; | |
242 | } | |
243 | } | |
244 | if (cmd != VIDIOC_G_CHIP_IDENT) | |
245 | CX18_ERR("i2c addr 0x%02x not found for cmd 0x%x!\n", | |
246 | addr, cmd); | |
247 | return -ENODEV; | |
248 | } | |
249 | ||
250 | /* Find the i2c device based on the driver ID and return | |
251 | its i2c address or -ENODEV if no matching device was found. */ | |
252 | static int cx18_i2c_id_addr(struct cx18 *cx, u32 id) | |
253 | { | |
254 | struct i2c_client *client; | |
255 | int retval = -ENODEV; | |
256 | int i; | |
257 | ||
258 | for (i = 0; i < I2C_CLIENTS_MAX; i++) { | |
259 | client = cx->i2c_clients[i]; | |
260 | if (client == NULL || client->driver == NULL) | |
261 | continue; | |
262 | if (id == client->driver->id) { | |
263 | retval = client->addr; | |
264 | break; | |
265 | } | |
266 | } | |
267 | return retval; | |
268 | } | |
269 | ||
270 | /* Find the i2c device name matching the DRIVERID */ | |
271 | static const char *cx18_i2c_id_name(u32 id) | |
272 | { | |
273 | int i; | |
274 | ||
275 | for (i = 0; i < ARRAY_SIZE(hw_driverids); i++) | |
276 | if (hw_driverids[i] == id) | |
af294867 | 277 | return hw_devicenames[i]; |
1c1e45d1 HV |
278 | return "unknown device"; |
279 | } | |
280 | ||
281 | /* Find the i2c device name matching the CX18_HW_ flag */ | |
282 | static const char *cx18_i2c_hw_name(u32 hw) | |
283 | { | |
284 | int i; | |
285 | ||
286 | for (i = 0; i < ARRAY_SIZE(hw_driverids); i++) | |
287 | if (1 << i == hw) | |
af294867 | 288 | return hw_devicenames[i]; |
1c1e45d1 HV |
289 | return "unknown device"; |
290 | } | |
291 | ||
292 | /* Find the i2c device matching the CX18_HW_ flag and return | |
293 | its i2c address or -ENODEV if no matching device was found. */ | |
294 | int cx18_i2c_hw_addr(struct cx18 *cx, u32 hw) | |
295 | { | |
296 | int i; | |
297 | ||
298 | for (i = 0; i < ARRAY_SIZE(hw_driverids); i++) | |
299 | if (1 << i == hw) | |
300 | return cx18_i2c_id_addr(cx, hw_driverids[i]); | |
301 | return -ENODEV; | |
302 | } | |
303 | ||
304 | /* Calls i2c device based on CX18_HW_ flag. If hw == 0, then do nothing. | |
305 | If hw == CX18_HW_GPIO then call the gpio handler. */ | |
306 | int cx18_i2c_hw(struct cx18 *cx, u32 hw, unsigned int cmd, void *arg) | |
307 | { | |
308 | int addr; | |
309 | ||
03c28085 | 310 | if (hw == 0) |
1c1e45d1 | 311 | return 0; |
03c28085 SD |
312 | |
313 | if (hw == CX18_HW_GPIO) | |
314 | return cx18_gpio(cx, cmd, arg); | |
315 | ||
1c1e45d1 HV |
316 | if (hw == CX18_HW_CX23418) |
317 | return cx18_av_cmd(cx, cmd, arg); | |
318 | ||
319 | addr = cx18_i2c_hw_addr(cx, hw); | |
320 | if (addr < 0) { | |
321 | CX18_ERR("i2c hardware 0x%08x (%s) not found for cmd 0x%x!\n", | |
322 | hw, cx18_i2c_hw_name(hw), cmd); | |
323 | return addr; | |
324 | } | |
325 | return cx18_call_i2c_client(cx, addr, cmd, arg); | |
326 | } | |
327 | ||
328 | /* Calls i2c device based on I2C driver ID. */ | |
329 | int cx18_i2c_id(struct cx18 *cx, u32 id, unsigned int cmd, void *arg) | |
330 | { | |
331 | int addr; | |
332 | ||
333 | addr = cx18_i2c_id_addr(cx, id); | |
334 | if (addr < 0) { | |
335 | if (cmd != VIDIOC_G_CHIP_IDENT) | |
336 | CX18_ERR("i2c ID 0x%08x (%s) not found for cmd 0x%x!\n", | |
337 | id, cx18_i2c_id_name(id), cmd); | |
338 | return addr; | |
339 | } | |
340 | return cx18_call_i2c_client(cx, addr, cmd, arg); | |
341 | } | |
342 | ||
343 | /* broadcast cmd for all I2C clients and for the gpio subsystem */ | |
344 | void cx18_call_i2c_clients(struct cx18 *cx, unsigned int cmd, void *arg) | |
345 | { | |
346 | if (cx->i2c_adap[0].algo == NULL || cx->i2c_adap[1].algo == NULL) { | |
347 | CX18_ERR("adapter is not set\n"); | |
348 | return; | |
349 | } | |
350 | cx18_av_cmd(cx, cmd, arg); | |
351 | i2c_clients_command(&cx->i2c_adap[0], cmd, arg); | |
352 | i2c_clients_command(&cx->i2c_adap[1], cmd, arg); | |
03c28085 SD |
353 | if (cx->hw_flags & CX18_HW_GPIO) |
354 | cx18_gpio(cx, cmd, arg); | |
1c1e45d1 HV |
355 | } |
356 | ||
357 | /* init + register i2c algo-bit adapter */ | |
358 | int init_cx18_i2c(struct cx18 *cx) | |
359 | { | |
360 | int i; | |
361 | CX18_DEBUG_I2C("i2c init\n"); | |
362 | ||
03c28085 SD |
363 | /* Sanity checks for the I2C hardware arrays. They must be the |
364 | * same size and GPIO/CX23418 must be the last entries. | |
365 | */ | |
366 | if (ARRAY_SIZE(hw_driverids) != ARRAY_SIZE(hw_addrs) || | |
367 | ARRAY_SIZE(hw_devicenames) != ARRAY_SIZE(hw_addrs) || | |
368 | CX18_HW_GPIO != (1 << (ARRAY_SIZE(hw_addrs) - 2)) || | |
369 | CX18_HW_CX23418 != (1 << (ARRAY_SIZE(hw_addrs) - 1)) || | |
370 | hw_driverids[ARRAY_SIZE(hw_addrs) - 1]) { | |
371 | CX18_ERR("Mismatched I2C hardware arrays\n"); | |
372 | return -ENODEV; | |
373 | } | |
374 | ||
1c1e45d1 HV |
375 | for (i = 0; i < 2; i++) { |
376 | memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template, | |
377 | sizeof(struct i2c_adapter)); | |
378 | memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template, | |
379 | sizeof(struct i2c_algo_bit_data)); | |
380 | cx->i2c_algo_cb_data[i].cx = cx; | |
381 | cx->i2c_algo_cb_data[i].bus_index = i; | |
382 | cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; | |
383 | cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; | |
384 | ||
385 | sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), | |
386 | " #%d-%d", cx->num, i); | |
387 | i2c_set_adapdata(&cx->i2c_adap[i], cx); | |
388 | ||
389 | memcpy(&cx->i2c_client[i], &cx18_i2c_client_template, | |
390 | sizeof(struct i2c_client)); | |
391 | sprintf(cx->i2c_client[i].name + | |
392 | strlen(cx->i2c_client[i].name), "%d", i); | |
393 | cx->i2c_client[i].adapter = &cx->i2c_adap[i]; | |
394 | cx->i2c_adap[i].dev.parent = &cx->dev->dev; | |
395 | } | |
396 | ||
b1526421 | 397 | if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { |
1c1e45d1 | 398 | /* Reset/Unreset I2C hardware block */ |
b1526421 | 399 | /* Clock select 220MHz */ |
ced07371 AW |
400 | cx18_write_reg_expect(cx, 0x10000000, 0xc71004, |
401 | 0x00000000, 0x10001000); | |
b1526421 | 402 | /* Clock Enable */ |
ced07371 AW |
403 | cx18_write_reg_expect(cx, 0x10001000, 0xc71024, |
404 | 0x00001000, 0x10001000); | |
1c1e45d1 HV |
405 | } |
406 | /* courtesy of Steven Toth <stoth@hauppauge.com> */ | |
ced07371 AW |
407 | cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); |
408 | if (!cx18_retry_mmio) | |
409 | (void) cx18_read_reg(cx, 0xc7001c); /* sync */ | |
1c1e45d1 | 410 | mdelay(10); |
ced07371 AW |
411 | cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); |
412 | if (!cx18_retry_mmio) | |
413 | (void) cx18_read_reg(cx, 0xc7001c); /* sync */ | |
1c1e45d1 | 414 | mdelay(10); |
ced07371 AW |
415 | cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); |
416 | if (!cx18_retry_mmio) | |
417 | (void) cx18_read_reg(cx, 0xc7001c); /* sync */ | |
53ad02ef | 418 | mdelay(10); |
1c1e45d1 | 419 | |
b1526421 | 420 | /* Set to edge-triggered intrs. */ |
ced07371 | 421 | cx18_write_reg(cx, 0x00c00000, 0xc730c8); |
b1526421 | 422 | /* Clear any stale intrs */ |
ced07371 AW |
423 | cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, |
424 | ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); | |
1c1e45d1 HV |
425 | |
426 | /* Hw I2C1 Clock Freq ~100kHz */ | |
b1526421 | 427 | cx18_write_reg_sync(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); |
1c1e45d1 HV |
428 | cx18_setscl(&cx->i2c_algo_cb_data[0], 1); |
429 | cx18_setsda(&cx->i2c_algo_cb_data[0], 1); | |
430 | ||
431 | /* Hw I2C2 Clock Freq ~100kHz */ | |
b1526421 | 432 | cx18_write_reg_sync(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); |
1c1e45d1 HV |
433 | cx18_setscl(&cx->i2c_algo_cb_data[1], 1); |
434 | cx18_setsda(&cx->i2c_algo_cb_data[1], 1); | |
435 | ||
1f09e8a2 AW |
436 | cx18_reset_i2c_slaves_gpio(cx); |
437 | ||
1c1e45d1 HV |
438 | return i2c_bit_add_bus(&cx->i2c_adap[0]) || |
439 | i2c_bit_add_bus(&cx->i2c_adap[1]); | |
440 | } | |
441 | ||
442 | void exit_cx18_i2c(struct cx18 *cx) | |
443 | { | |
444 | int i; | |
445 | CX18_DEBUG_I2C("i2c exit\n"); | |
b1526421 AW |
446 | cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, |
447 | CX18_REG_I2C_1_WR); | |
448 | cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, | |
449 | CX18_REG_I2C_2_WR); | |
1c1e45d1 HV |
450 | |
451 | for (i = 0; i < 2; i++) { | |
452 | i2c_del_adapter(&cx->i2c_adap[i]); | |
453 | } | |
454 | } | |
455 | ||
456 | /* | |
457 | Hauppauge HVR1600 should have: | |
458 | 32 cx24227 | |
459 | 98 unknown | |
460 | a0 eeprom | |
461 | c2 tuner | |
462 | e? zilog ir | |
463 | */ |