twl6030.c 7.4 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309
  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2010
  4. * Texas Instruments, <www.ti.com>
  5. */
  6. #include <config.h>
  7. #include <twl6030.h>
  8. static struct twl6030_data *twl;
  9. static struct twl6030_data twl6030_info = {
  10. .chip_type = chip_TWL6030,
  11. .adc_rbase = GPCH0_LSB,
  12. .adc_ctrl = CTRL_P2,
  13. .adc_enable = CTRL_P2_SP2,
  14. .vbat_mult = TWL6030_VBAT_MULT,
  15. .vbat_shift = TWL6030_VBAT_SHIFT,
  16. };
  17. static struct twl6030_data twl6032_info = {
  18. .chip_type = chip_TWL6032,
  19. .adc_rbase = TWL6032_GPCH0_LSB,
  20. .adc_ctrl = TWL6032_CTRL_P1,
  21. .adc_enable = CTRL_P1_SP1,
  22. .vbat_mult = TWL6032_VBAT_MULT,
  23. .vbat_shift = TWL6032_VBAT_SHIFT,
  24. };
  25. static int twl6030_gpadc_read_channel(u8 channel_no)
  26. {
  27. u8 lsb = 0;
  28. u8 msb = 0;
  29. int ret = 0;
  30. ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  31. twl->adc_rbase + channel_no * 2, &lsb);
  32. if (ret)
  33. return ret;
  34. ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  35. twl->adc_rbase + 1 + channel_no * 2, &msb);
  36. if (ret)
  37. return ret;
  38. return (msb << 8) | lsb;
  39. }
  40. static int twl6030_gpadc_sw2_trigger(void)
  41. {
  42. u8 val;
  43. int ret = 0;
  44. ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
  45. twl->adc_ctrl, twl->adc_enable);
  46. if (ret)
  47. return ret;
  48. /* Waiting until the SW1 conversion ends*/
  49. val = CTRL_P2_BUSY;
  50. while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
  51. ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  52. twl->adc_ctrl, &val);
  53. if (ret)
  54. return ret;
  55. udelay(1000);
  56. }
  57. return 0;
  58. }
  59. void twl6030_power_off(void)
  60. {
  61. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON,
  62. TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF |
  63. TWL6030_PHOENIX_MOD_DEVOFF);
  64. }
  65. void twl6030_stop_usb_charging(void)
  66. {
  67. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
  68. return;
  69. }
  70. void twl6030_start_usb_charging(void)
  71. {
  72. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  73. CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
  74. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  75. CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
  76. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  77. CONTROLLER_INT_MASK, MBAT_TEMP);
  78. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  79. CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
  80. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  81. CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
  82. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  83. CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
  84. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
  85. /* Enable USB charging */
  86. twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  87. CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
  88. return;
  89. }
  90. int twl6030_get_battery_current(void)
  91. {
  92. int battery_current = 0;
  93. u8 msb = 0;
  94. u8 lsb = 0;
  95. twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
  96. twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
  97. battery_current = ((msb << 8) | lsb);
  98. /* convert 10 bit signed number to 16 bit signed number */
  99. if (battery_current >= 0x2000)
  100. battery_current = (battery_current - 0x4000);
  101. battery_current = battery_current * 3000 / 4096;
  102. printf("Battery Current: %d mA\n", battery_current);
  103. return battery_current;
  104. }
  105. int twl6030_get_battery_voltage(void)
  106. {
  107. int battery_volt = 0;
  108. int ret = 0;
  109. u8 vbatch;
  110. if (twl->chip_type == chip_TWL6030) {
  111. vbatch = TWL6030_GPADC_VBAT_CHNL;
  112. } else {
  113. ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
  114. TWL6032_GPSELECT_ISB,
  115. TWL6032_GPADC_VBAT_CHNL);
  116. if (ret)
  117. return ret;
  118. vbatch = 0;
  119. }
  120. /* Start GPADC SW conversion */
  121. ret = twl6030_gpadc_sw2_trigger();
  122. if (ret) {
  123. printf("Failed to convert battery voltage\n");
  124. return ret;
  125. }
  126. /* measure Vbat voltage */
  127. battery_volt = twl6030_gpadc_read_channel(vbatch);
  128. if (battery_volt < 0) {
  129. printf("Failed to read battery voltage\n");
  130. return ret;
  131. }
  132. battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
  133. printf("Battery Voltage: %d mV\n", battery_volt);
  134. return battery_volt;
  135. }
  136. void twl6030_init_battery_charging(void)
  137. {
  138. u8 val = 0;
  139. int battery_volt = 0;
  140. int ret = 0;
  141. ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val);
  142. if (ret) {
  143. puts("twl6030_init_battery_charging(): could not determine chip!\n");
  144. return;
  145. }
  146. if (val == 0x30) {
  147. twl = &twl6030_info;
  148. } else if (val == 0x32) {
  149. twl = &twl6032_info;
  150. } else {
  151. puts("twl6030_init_battery_charging(): unsupported chip type\n");
  152. return;
  153. }
  154. /* Enable VBAT measurement */
  155. if (twl->chip_type == chip_TWL6030) {
  156. twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
  157. twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
  158. TWL6030_GPADC_CTRL,
  159. GPADC_CTRL_SCALER_DIV4);
  160. } else {
  161. twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
  162. TWL6032_GPADC_CTRL2,
  163. GPADC_CTRL2_CH18_SCALER_EN);
  164. }
  165. /* Enable GPADC module */
  166. ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
  167. if (ret) {
  168. printf("Failed to enable GPADC\n");
  169. return;
  170. }
  171. battery_volt = twl6030_get_battery_voltage();
  172. if (battery_volt < 0)
  173. return;
  174. if (battery_volt < 3000)
  175. printf("Main battery voltage too low!\n");
  176. /* Check for the presence of USB charger */
  177. twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val);
  178. /* check for battery presence indirectly via Fuel gauge */
  179. if ((val & VBUS_DET) && (battery_volt < 3300))
  180. twl6030_start_usb_charging();
  181. return;
  182. }
  183. void twl6030_power_mmc_init(int dev_index)
  184. {
  185. u8 value = 0;
  186. if (dev_index == 0) {
  187. /* 3.0V voltage output for VMMC */
  188. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
  189. TWL6030_CFG_VOLTAGE_30);
  190. /* Enable P1 output for VMMC */
  191. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
  192. TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
  193. } else if (dev_index == 1) {
  194. twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT,
  195. &value);
  196. /* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */
  197. if (value & TWL6030_PH_STS_BOOT2) {
  198. /* 1.8V voltage output for VAUX1 */
  199. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
  200. TWL6030_CFG_VOLTAGE_18);
  201. } else {
  202. /* 2.8V voltage output for VAUX1 */
  203. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
  204. TWL6030_CFG_VOLTAGE_28);
  205. }
  206. /* Enable P1 output for VAUX */
  207. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE,
  208. TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
  209. }
  210. }
  211. void twl6030_usb_device_settings()
  212. {
  213. u8 value = 0;
  214. /* 3.3V voltage output for VUSB */
  215. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
  216. TWL6030_CFG_VOLTAGE_33);
  217. /* Enable P1 output for VUSB */
  218. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
  219. TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
  220. /* Select the input supply for VUSB regulator */
  221. twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
  222. value |= TWL6030_MISC2_VUSB_IN_VSYS;
  223. value &= ~TWL6030_MISC2_VUSB_IN_PMID;
  224. twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
  225. }
  226. #ifdef CONFIG_DM_I2C
  227. int twl6030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
  228. {
  229. struct udevice *dev;
  230. int ret;
  231. ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
  232. if (ret) {
  233. pr_err("unable to get I2C bus. ret %d\n", ret);
  234. return ret;
  235. }
  236. ret = dm_i2c_reg_write(dev, reg, val);
  237. if (ret) {
  238. pr_err("writing to twl6030 failed. ret %d\n", ret);
  239. return ret;
  240. }
  241. return 0;
  242. }
  243. int twl6030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
  244. {
  245. struct udevice *dev;
  246. int ret;
  247. ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
  248. if (ret) {
  249. pr_err("unable to get I2C bus. ret %d\n", ret);
  250. return ret;
  251. }
  252. ret = dm_i2c_reg_read(dev, reg);
  253. if (ret < 0) {
  254. pr_err("reading from twl6030 failed. ret %d\n", ret);
  255. return ret;
  256. }
  257. *valp = (u8)ret;
  258. return 0;
  259. }
  260. #endif