cx88-i2c.c 6.5 KB

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  1. /*
  2. cx88-i2c.c -- all the i2c code is here
  3. Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
  4. & Marcus Metzler (mocm@thp.uni-koeln.de)
  5. (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
  6. (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
  7. (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
  8. - Multituner support and i2c address binding
  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; either version 2 of the License, or
  12. (at your option) any later version.
  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. 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. #include <linux/module.h>
  22. #include <linux/moduleparam.h>
  23. #include <linux/init.h>
  24. #include <asm/io.h>
  25. #include "cx88.h"
  26. #include <media/v4l2-common.h>
  27. static unsigned int i2c_debug = 0;
  28. module_param(i2c_debug, int, 0644);
  29. MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
  30. static unsigned int i2c_scan = 0;
  31. module_param(i2c_scan, int, 0444);
  32. MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
  33. #define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
  34. printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
  35. /* ----------------------------------------------------------------------- */
  36. static void cx8800_bit_setscl(void *data, int state)
  37. {
  38. struct cx88_core *core = data;
  39. if (state)
  40. core->i2c_state |= 0x02;
  41. else
  42. core->i2c_state &= ~0x02;
  43. cx_write(MO_I2C, core->i2c_state);
  44. cx_read(MO_I2C);
  45. }
  46. static void cx8800_bit_setsda(void *data, int state)
  47. {
  48. struct cx88_core *core = data;
  49. if (state)
  50. core->i2c_state |= 0x01;
  51. else
  52. core->i2c_state &= ~0x01;
  53. cx_write(MO_I2C, core->i2c_state);
  54. cx_read(MO_I2C);
  55. }
  56. static int cx8800_bit_getscl(void *data)
  57. {
  58. struct cx88_core *core = data;
  59. u32 state;
  60. state = cx_read(MO_I2C);
  61. return state & 0x02 ? 1 : 0;
  62. }
  63. static int cx8800_bit_getsda(void *data)
  64. {
  65. struct cx88_core *core = data;
  66. u32 state;
  67. state = cx_read(MO_I2C);
  68. return state & 0x01;
  69. }
  70. /* ----------------------------------------------------------------------- */
  71. static int attach_inform(struct i2c_client *client)
  72. {
  73. struct tuner_setup tun_setup;
  74. struct cx88_core *core = i2c_get_adapdata(client->adapter);
  75. dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
  76. client->driver->driver.name, client->addr, client->name);
  77. if (!client->driver->command)
  78. return 0;
  79. if (core->radio_type != UNSET) {
  80. if ((core->radio_addr==ADDR_UNSET)||(core->radio_addr==client->addr)) {
  81. tun_setup.mode_mask = T_RADIO;
  82. tun_setup.type = core->radio_type;
  83. tun_setup.addr = core->radio_addr;
  84. client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
  85. }
  86. }
  87. if (core->tuner_type != UNSET) {
  88. if ((core->tuner_addr==ADDR_UNSET)||(core->tuner_addr==client->addr)) {
  89. tun_setup.mode_mask = T_ANALOG_TV;
  90. tun_setup.type = core->tuner_type;
  91. tun_setup.addr = core->tuner_addr;
  92. client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
  93. }
  94. }
  95. if (core->tda9887_conf)
  96. client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
  97. return 0;
  98. }
  99. static int detach_inform(struct i2c_client *client)
  100. {
  101. struct cx88_core *core = i2c_get_adapdata(client->adapter);
  102. dprintk(1, "i2c detach [client=%s]\n", client->name);
  103. return 0;
  104. }
  105. void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
  106. {
  107. if (0 != core->i2c_rc)
  108. return;
  109. if (core->dvbdev) {
  110. if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
  111. core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
  112. i2c_clients_command(&core->i2c_adap, cmd, arg);
  113. if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
  114. core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
  115. } else
  116. i2c_clients_command(&core->i2c_adap, cmd, arg);
  117. }
  118. static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
  119. .setsda = cx8800_bit_setsda,
  120. .setscl = cx8800_bit_setscl,
  121. .getsda = cx8800_bit_getsda,
  122. .getscl = cx8800_bit_getscl,
  123. .udelay = 16,
  124. .mdelay = 10,
  125. .timeout = 200,
  126. };
  127. /* ----------------------------------------------------------------------- */
  128. static struct i2c_adapter cx8800_i2c_adap_template = {
  129. .name = "cx2388x",
  130. .owner = THIS_MODULE,
  131. .id = I2C_HW_B_CX2388x,
  132. .client_register = attach_inform,
  133. .client_unregister = detach_inform,
  134. };
  135. static struct i2c_client cx8800_i2c_client_template = {
  136. .name = "cx88xx internal",
  137. };
  138. static char *i2c_devs[128] = {
  139. [ 0x1c >> 1 ] = "lgdt330x",
  140. [ 0x86 >> 1 ] = "tda9887/cx22702",
  141. [ 0xa0 >> 1 ] = "eeprom",
  142. [ 0xc0 >> 1 ] = "tuner (analog)",
  143. [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
  144. };
  145. static void do_i2c_scan(char *name, struct i2c_client *c)
  146. {
  147. unsigned char buf;
  148. int i,rc;
  149. for (i = 0; i < 128; i++) {
  150. c->addr = i;
  151. rc = i2c_master_recv(c,&buf,0);
  152. if (rc < 0)
  153. continue;
  154. printk("%s: i2c scan: found device @ 0x%x [%s]\n",
  155. name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
  156. }
  157. }
  158. /* init + register i2c algo-bit adapter */
  159. int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
  160. {
  161. memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
  162. sizeof(core->i2c_adap));
  163. memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
  164. sizeof(core->i2c_algo));
  165. memcpy(&core->i2c_client, &cx8800_i2c_client_template,
  166. sizeof(core->i2c_client));
  167. if (core->tuner_type != TUNER_ABSENT)
  168. core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
  169. if (cx88_boards[core->board].dvb)
  170. core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
  171. core->i2c_adap.dev.parent = &pci->dev;
  172. strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
  173. core->i2c_algo.data = core;
  174. i2c_set_adapdata(&core->i2c_adap,core);
  175. core->i2c_adap.algo_data = &core->i2c_algo;
  176. core->i2c_client.adapter = &core->i2c_adap;
  177. cx8800_bit_setscl(core,1);
  178. cx8800_bit_setsda(core,1);
  179. core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
  180. if (0 == core->i2c_rc) {
  181. dprintk(1, "i2c register ok\n");
  182. if (i2c_scan)
  183. do_i2c_scan(core->name,&core->i2c_client);
  184. } else
  185. printk("%s: i2c register FAILED\n", core->name);
  186. return core->i2c_rc;
  187. }
  188. /* ----------------------------------------------------------------------- */
  189. EXPORT_SYMBOL(cx88_call_i2c_clients);
  190. /*
  191. * Local variables:
  192. * c-basic-offset: 8
  193. * End:
  194. */