board.c 6.9 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * board.c
  4. *
  5. * Board functions for EETS PDU001 board
  6. *
  7. * Copyright (C) 2018, EETS GmbH, http://www.eets.ch/
  8. *
  9. * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
  10. */
  11. #include <common.h>
  12. #include <env.h>
  13. #include <errno.h>
  14. #include <init.h>
  15. #include <spl.h>
  16. #include <i2c.h>
  17. #include <watchdog.h>
  18. #include <debug_uart.h>
  19. #include <dm/ofnode.h>
  20. #include <power/pmic.h>
  21. #include <power/regulator.h>
  22. #include <asm/arch/cpu.h>
  23. #include <asm/arch/hardware.h>
  24. #include <asm/arch/omap.h>
  25. #include <asm/arch/ddr_defs.h>
  26. #include <asm/arch/clock.h>
  27. #include <asm/arch/gpio.h>
  28. #include <asm/arch/mmc_host_def.h>
  29. #include <asm/arch/sys_proto.h>
  30. #include <asm/arch/mem.h>
  31. #include <asm/io.h>
  32. #include <asm/emif.h>
  33. #include <asm/gpio.h>
  34. #include "board.h"
  35. DECLARE_GLOBAL_DATA_PTR;
  36. #define I2C_ADDR_NODE_ID 0x50
  37. #define I2C_REG_NODE_ID_BASE 0xfa
  38. #define NODE_ID_BYTE_COUNT 6
  39. #define I2C_ADDR_LEDS 0x60
  40. #define I2C_REG_RUN_LED 0x06
  41. #define RUN_LED_OFF 0x0
  42. #define RUN_LED_RED 0x1
  43. #define RUN_LED_GREEN (0x1 << 2)
  44. #define VDD_MPU_REGULATOR "regulator@2"
  45. #define VDD_CORE_REGULATOR "regulator@3"
  46. #define DEFAULT_CORE_VOLTAGE 1137500
  47. /*
  48. * boot device save register
  49. * -------------------------
  50. * The boot device can be quired by 'spl_boot_device()' in
  51. * 'am33xx_spl_board_init'. However it can't be saved in the u-boot
  52. * environment here. In turn 'spl_boot_device' can't be called in
  53. * 'board_late_init' which allows writing to u-boot environment.
  54. * To get the boot device from 'am33xx_spl_board_init' to
  55. * 'board_late_init' we therefore use a scratch register from the RTC.
  56. */
  57. #define CONFIG_SYS_RTC_SCRATCH0 0x60
  58. #define BOOT_DEVICE_SAVE_REGISTER (RTC_BASE + CONFIG_SYS_RTC_SCRATCH0)
  59. #ifdef CONFIG_SPL_BUILD
  60. static void save_boot_device(void)
  61. {
  62. *((u32 *)(BOOT_DEVICE_SAVE_REGISTER)) = spl_boot_device();
  63. }
  64. #endif
  65. u32 boot_device(void)
  66. {
  67. return *((u32 *)(BOOT_DEVICE_SAVE_REGISTER));
  68. }
  69. /* Store the boot device in the environment variable 'boot_device' */
  70. static void env_set_boot_device(void)
  71. {
  72. switch (boot_device()) {
  73. case BOOT_DEVICE_MMC1: {
  74. env_set("boot_device", "emmc");
  75. break;
  76. }
  77. case BOOT_DEVICE_MMC2: {
  78. env_set("boot_device", "sdcard");
  79. break;
  80. }
  81. default: {
  82. env_set("boot_device", "unknown");
  83. break;
  84. }
  85. }
  86. }
  87. static void set_run_led(struct udevice *dev)
  88. {
  89. int val = RUN_LED_OFF;
  90. if (IS_ENABLED(CONFIG_RUN_LED_RED))
  91. val = RUN_LED_RED;
  92. else if (IS_ENABLED(CONFIG_RUN_LED_GREEN))
  93. val = RUN_LED_GREEN;
  94. dm_i2c_reg_write(dev, I2C_REG_RUN_LED, val);
  95. }
  96. /* Set 'serial#' to the EUI-48 value of board node ID chip */
  97. static void env_set_serial(struct udevice *dev)
  98. {
  99. int val;
  100. char serial[2 * NODE_ID_BYTE_COUNT + 1];
  101. int n;
  102. for (n = 0; n < sizeof(serial); n += 2) {
  103. val = dm_i2c_reg_read(dev, I2C_REG_NODE_ID_BASE + n / 2);
  104. sprintf(serial + n, "%02X", val);
  105. }
  106. serial[2 * NODE_ID_BYTE_COUNT] = '\0';
  107. env_set("serial#", serial);
  108. }
  109. static void set_mpu_and_core_voltage(void)
  110. {
  111. int mpu_vdd;
  112. int sil_rev;
  113. struct udevice *dev;
  114. struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
  115. /*
  116. * The PDU001 (more precisely the computing module m2) uses a
  117. * TPS65910 PMIC. For all MPU frequencies we support we use a CORE
  118. * voltage of 1.1375V. For MPU voltage we need to switch based on
  119. * the frequency we are running at.
  120. */
  121. /*
  122. * Depending on MPU clock and PG we will need a different VDD
  123. * to drive at that speed.
  124. */
  125. sil_rev = readl(&cdev->deviceid) >> 28;
  126. mpu_vdd = am335x_get_mpu_vdd(sil_rev, dpll_mpu_opp100.m);
  127. /* first update the MPU voltage */
  128. if (!regulator_get_by_devname(VDD_MPU_REGULATOR, &dev)) {
  129. if (regulator_set_value(dev, mpu_vdd))
  130. debug("failed to set MPU voltage\n");
  131. } else {
  132. debug("invalid MPU voltage ragulator %s\n", VDD_MPU_REGULATOR);
  133. }
  134. /* second update the CORE voltage */
  135. if (!regulator_get_by_devname(VDD_CORE_REGULATOR, &dev)) {
  136. if (regulator_set_value(dev, DEFAULT_CORE_VOLTAGE))
  137. debug("failed to set CORE voltage\n");
  138. } else {
  139. debug("invalid CORE voltage ragulator %s\n",
  140. VDD_CORE_REGULATOR);
  141. }
  142. }
  143. #ifndef CONFIG_SKIP_LOWLEVEL_INIT
  144. static const struct ddr_data ddr2_data = {
  145. .datardsratio0 = MT47H128M16RT25E_RD_DQS,
  146. .datafwsratio0 = MT47H128M16RT25E_PHY_FIFO_WE,
  147. .datawrsratio0 = MT47H128M16RT25E_PHY_WR_DATA,
  148. };
  149. static const struct cmd_control ddr2_cmd_ctrl_data = {
  150. .cmd0csratio = MT47H128M16RT25E_RATIO,
  151. .cmd1csratio = MT47H128M16RT25E_RATIO,
  152. .cmd2csratio = MT47H128M16RT25E_RATIO,
  153. };
  154. static const struct emif_regs ddr2_emif_reg_data = {
  155. .sdram_config = MT47H128M16RT25E_EMIF_SDCFG,
  156. .ref_ctrl = MT47H128M16RT25E_EMIF_SDREF,
  157. .sdram_tim1 = MT47H128M16RT25E_EMIF_TIM1,
  158. .sdram_tim2 = MT47H128M16RT25E_EMIF_TIM2,
  159. .sdram_tim3 = MT47H128M16RT25E_EMIF_TIM3,
  160. .emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY,
  161. };
  162. #define OSC (V_OSCK / 1000000)
  163. const struct dpll_params dpll_ddr = {
  164. 266, OSC - 1, 1, -1, -1, -1, -1};
  165. const struct dpll_params dpll_ddr_evm_sk = {
  166. 303, OSC - 1, 1, -1, -1, -1, -1};
  167. const struct dpll_params dpll_ddr_bone_black = {
  168. 400, OSC - 1, 1, -1, -1, -1, -1};
  169. void am33xx_spl_board_init(void)
  170. {
  171. struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
  172. /* Get the frequency */
  173. dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
  174. /* Set CORE Frequencies to OPP100 */
  175. do_setup_dpll(&dpll_core_regs, &dpll_core_opp100);
  176. /* Set MPU Frequency to what we detected now that voltages are set */
  177. do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100);
  178. /* save boot device for later use by 'board_late_init' */
  179. save_boot_device();
  180. }
  181. const struct dpll_params *get_dpll_ddr_params(void)
  182. {
  183. enable_i2c0_pin_mux();
  184. return &dpll_ddr;
  185. }
  186. void set_mux_conf_regs(void)
  187. {
  188. /* done first by the ROM and afterwards by the pin controller driver */
  189. enable_i2c0_pin_mux();
  190. }
  191. const struct ctrl_ioregs ioregs = {
  192. .cm0ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
  193. .cm1ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
  194. .cm2ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
  195. .dt0ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
  196. .dt1ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
  197. };
  198. void sdram_init(void)
  199. {
  200. config_ddr(266, &ioregs, &ddr2_data,
  201. &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data, 0);
  202. }
  203. #endif /* CONFIG_SKIP_LOWLEVEL_INIT */
  204. #ifdef CONFIG_DEBUG_UART
  205. void board_debug_uart_init(void)
  206. {
  207. /* done by pin controller driver if not debugging */
  208. enable_uart_pin_mux(CONFIG_DEBUG_UART_BASE);
  209. }
  210. #endif
  211. /*
  212. * Basic board specific setup. Pinmux has been handled already.
  213. */
  214. int board_init(void)
  215. {
  216. #ifdef CONFIG_HW_WATCHDOG
  217. hw_watchdog_init();
  218. #endif
  219. gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
  220. return 0;
  221. }
  222. #ifdef CONFIG_BOARD_LATE_INIT
  223. int board_late_init(void)
  224. {
  225. struct udevice *dev;
  226. set_mpu_and_core_voltage();
  227. env_set_boot_device();
  228. /* second I2C bus connects to node ID and front panel LED chip */
  229. if (!i2c_get_chip_for_busnum(1, I2C_ADDR_LEDS, 1, &dev))
  230. set_run_led(dev);
  231. if (!i2c_get_chip_for_busnum(1, I2C_ADDR_NODE_ID, 1, &dev))
  232. env_set_serial(dev);
  233. return 0;
  234. }
  235. #endif