pf0100.c 6.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2014-2019, Toradex AG
  4. */
  5. /*
  6. * Helpers for Freescale PMIC PF0100
  7. */
  8. #include <common.h>
  9. #include <i2c.h>
  10. #include <asm/arch/imx-regs.h>
  11. #include <asm/arch/iomux.h>
  12. #include <asm/arch/mx6-pins.h>
  13. #include <asm/gpio.h>
  14. #include <asm/mach-imx/iomux-v3.h>
  15. #include "pf0100_otp.inc"
  16. #include "pf0100.h"
  17. /* define for PMIC register dump */
  18. /*#define DEBUG */
  19. #define WARNBAR "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n"
  20. /* use Apalis GPIO1 to switch on VPGM, ON: 1 */
  21. static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
  22. MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
  23. # define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
  24. };
  25. unsigned pmic_init(void)
  26. {
  27. int rc;
  28. struct udevice *dev = NULL;
  29. unsigned programmed = 0;
  30. uchar bus = 1;
  31. uchar devid, revid, val;
  32. puts("PMIC: ");
  33. rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
  34. if (rc) {
  35. printf("failed to get device for PMIC at address 0x%x\n",
  36. PFUZE100_I2C_ADDR);
  37. return 0;
  38. }
  39. /* check for errors in PMIC fuses */
  40. if (dm_i2c_read(dev, PFUZE100_INTSTAT3, &val, 1) < 0) {
  41. puts("i2c pmic INTSTAT3 register read failed\n");
  42. return 0;
  43. }
  44. if (val & PFUZE100_BIT_OTP_ECCI) {
  45. puts("\n" WARNBAR);
  46. puts("WARNING: ecc errors found in pmic fuse banks\n");
  47. puts(WARNBAR);
  48. }
  49. if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE1, &val, 1) < 0) {
  50. puts("i2c pmic ECC_SE1 register read failed\n");
  51. return 0;
  52. }
  53. if (val & PFUZE100_BITS_ECC_SE1) {
  54. puts(WARNBAR);
  55. puts("WARNING: ecc has made bit corrections in banks 1 to 5\n");
  56. puts(WARNBAR);
  57. }
  58. if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE2, &val, 1) < 0) {
  59. puts("i2c pmic ECC_SE2 register read failed\n");
  60. return 0;
  61. }
  62. if (val & PFUZE100_BITS_ECC_SE2) {
  63. puts(WARNBAR);
  64. puts("WARNING: ecc has made bit corrections in banks 6 to 10\n"
  65. );
  66. puts(WARNBAR);
  67. }
  68. if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE1, &val, 1) < 0) {
  69. puts("i2c pmic ECC_DE register read failed\n");
  70. return 0;
  71. }
  72. if (val & PFUZE100_BITS_ECC_DE1) {
  73. puts(WARNBAR);
  74. puts("ERROR: banks 1 to 5 have uncorrectable bits\n");
  75. puts(WARNBAR);
  76. }
  77. if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE2, &val, 1) < 0) {
  78. puts("i2c pmic ECC_DE register read failed\n");
  79. return 0;
  80. }
  81. if (val & PFUZE100_BITS_ECC_DE2) {
  82. puts(WARNBAR);
  83. puts("ERROR: banks 6 to 10 have uncorrectable bits\n");
  84. puts(WARNBAR);
  85. }
  86. /* get device ident */
  87. if (dm_i2c_read(dev, PFUZE100_DEVICEID, &devid, 1) < 0) {
  88. puts("i2c pmic devid read failed\n");
  89. return 0;
  90. }
  91. if (dm_i2c_read(dev, PFUZE100_REVID, &revid, 1) < 0) {
  92. puts("i2c pmic revid read failed\n");
  93. return 0;
  94. }
  95. printf("device id: 0x%.2x, revision id: 0x%.2x, ", devid, revid);
  96. /* get device programmed state */
  97. val = PFUZE100_PAGE_REGISTER_PAGE1;
  98. if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
  99. puts("i2c write failed\n");
  100. return 0;
  101. }
  102. if (dm_i2c_read(dev, PFUZE100_FUSE_POR1, &val, 1) < 0) {
  103. puts("i2c fuse_por read failed\n");
  104. return 0;
  105. }
  106. if (val & PFUZE100_FUSE_POR_M)
  107. programmed++;
  108. if (dm_i2c_read(dev, PFUZE100_FUSE_POR2, &val, 1) < 0) {
  109. puts("i2c fuse_por read failed\n");
  110. return programmed;
  111. }
  112. if (val & PFUZE100_FUSE_POR_M)
  113. programmed++;
  114. if (dm_i2c_read(dev, PFUZE100_FUSE_POR3, &val, 1) < 0) {
  115. puts("i2c fuse_por read failed\n");
  116. return programmed;
  117. }
  118. if (val & PFUZE100_FUSE_POR_M)
  119. programmed++;
  120. switch (programmed) {
  121. case 0:
  122. puts("not programmed\n");
  123. break;
  124. case 3:
  125. puts("programmed\n");
  126. break;
  127. default:
  128. puts("undefined programming state\n");
  129. break;
  130. }
  131. /* The following is needed during production */
  132. if (programmed != 3) {
  133. /* set VGEN1 to 1.2V */
  134. val = PFUZE100_VGEN1_VAL;
  135. if (dm_i2c_write(dev, PFUZE100_VGEN1CTL, &val, 1)) {
  136. puts("i2c write failed\n");
  137. return programmed;
  138. }
  139. /* set SWBST to 5.0V */
  140. val = PFUZE100_SWBST_VAL;
  141. if (dm_i2c_write(dev, PFUZE100_SWBSTCTL, &val, 1))
  142. puts("i2c write failed\n");
  143. }
  144. #ifdef DEBUG
  145. {
  146. unsigned int i, j;
  147. for (i = 0; i < 16; i++)
  148. printf("\t%x", i);
  149. for (j = 0; j < 0x80; ) {
  150. printf("\n%2x", j);
  151. for (i = 0; i < 16; i++) {
  152. dm_i2c_read(dev, j + i, &val, 1);
  153. printf("\t%2x", val);
  154. }
  155. j += 0x10;
  156. }
  157. printf("\nEXT Page 1");
  158. val = PFUZE100_PAGE_REGISTER_PAGE1;
  159. if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
  160. puts("i2c write failed\n");
  161. return 0;
  162. }
  163. for (j = 0x80; j < 0x100; ) {
  164. printf("\n%2x", j);
  165. for (i = 0; i < 16; i++) {
  166. dm_i2c_read(dev, j + i, &val, 1);
  167. printf("\t%2x", val);
  168. }
  169. j += 0x10;
  170. }
  171. printf("\nEXT Page 2");
  172. val = PFUZE100_PAGE_REGISTER_PAGE2;
  173. if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
  174. puts("i2c write failed\n");
  175. return 0;
  176. }
  177. for (j = 0x80; j < 0x100; ) {
  178. printf("\n%2x", j);
  179. for (i = 0; i < 16; i++) {
  180. dm_i2c_read(dev, j + i, &val, 1);
  181. printf("\t%2x", val);
  182. }
  183. j += 0x10;
  184. }
  185. printf("\n");
  186. }
  187. #endif /* DEBUG */
  188. return programmed;
  189. }
  190. #ifndef CONFIG_SPL_BUILD
  191. static int pf0100_prog(void)
  192. {
  193. int rc;
  194. struct udevice *dev = NULL;
  195. unsigned char bus = 1;
  196. unsigned char val;
  197. unsigned int i;
  198. if (pmic_init() == 3) {
  199. puts("PMIC already programmed, exiting\n");
  200. return CMD_RET_FAILURE;
  201. }
  202. /* set up gpio to manipulate vprog, initially off */
  203. imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
  204. ARRAY_SIZE(pmic_prog_pads));
  205. gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
  206. rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
  207. if (rc) {
  208. printf("failed to get device for PMIC at address 0x%x\n",
  209. PFUZE100_I2C_ADDR);
  210. return CMD_RET_FAILURE;
  211. }
  212. for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
  213. switch (pmic_otp_prog[i].cmd) {
  214. case pmic_i2c:
  215. val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
  216. if (dm_i2c_write(dev, pmic_otp_prog[i].reg, &val, 1)) {
  217. printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
  218. pmic_otp_prog[i].reg, val);
  219. return CMD_RET_FAILURE;
  220. }
  221. break;
  222. case pmic_delay:
  223. udelay(pmic_otp_prog[i].value * 1000);
  224. break;
  225. case pmic_vpgm:
  226. gpio_direction_output(PMIC_PROG_VOLTAGE,
  227. pmic_otp_prog[i].value);
  228. break;
  229. case pmic_pwr:
  230. /* TODO */
  231. break;
  232. }
  233. }
  234. return CMD_RET_SUCCESS;
  235. }
  236. static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
  237. char * const argv[])
  238. {
  239. int ret;
  240. puts("Programming PMIC OTP...");
  241. ret = pf0100_prog();
  242. if (ret == CMD_RET_SUCCESS)
  243. puts("done.\n");
  244. else
  245. puts("failed.\n");
  246. return ret;
  247. }
  248. U_BOOT_CMD(
  249. pf0100_otp_prog, 1, 0, do_pf0100_prog,
  250. "Program the OTP fuses on the PMIC PF0100",
  251. ""
  252. );
  253. #endif /* CONFIG_SPL_BUILD */