diff options
Diffstat (limited to 'board/toradex/apalis_imx6/pf0100.c')
| -rw-r--r-- | board/toradex/apalis_imx6/pf0100.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/board/toradex/apalis_imx6/pf0100.c b/board/toradex/apalis_imx6/pf0100.c new file mode 100644 index 0000000000..0b424384b9 --- /dev/null +++ b/board/toradex/apalis_imx6/pf0100.c @@ -0,0 +1,228 @@ +/* + * Copyright (C) 2014-2016, Toradex AG + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * Helpers for Freescale PMIC PF0100 +*/ + +#include <common.h> +#include <i2c.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/iomux.h> +#include <asm/arch/mx6-pins.h> +#include <asm/gpio.h> +#include <asm/imx-common/iomux-v3.h> + +#include "pf0100_otp.inc" +#include "pf0100.h" + +/* define for PMIC register dump */ +/*#define DEBUG */ + +/* use Apalis GPIO1 to switch on VPGM, ON: 1 */ +static iomux_v3_cfg_t const pmic_prog_pads[] = { + MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL), +# define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4) +}; + +unsigned pmic_init(void) +{ + unsigned programmed = 0; + uchar bus = 1; + uchar devid, revid, val; + + puts("PMIC: "); + if (!((0 == i2c_set_bus_num(bus)) && + (0 == i2c_probe(PFUZE100_I2C_ADDR)))) { + puts("i2c bus failed\n"); + return 0; + } + /* get device ident */ + if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) { + puts("i2c pmic devid read failed\n"); + return 0; + } + if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) { + puts("i2c pmic revid read failed\n"); + return 0; + } + printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid); + +#ifdef DEBUG + { + unsigned i, j; + + for (i = 0; i < 16; i++) + printf("\t%x", i); + for (j = 0; j < 0x80; ) { + printf("\n%2x", j); + for (i = 0; i < 16; i++) { + i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1); + printf("\t%2x", val); + } + j += 0x10; + } + printf("\nEXT Page 1"); + + val = PFUZE100_PAGE_REGISTER_PAGE1; + if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, + &val, 1)) { + puts("i2c write failed\n"); + return 0; + } + + for (j = 0x80; j < 0x100; ) { + printf("\n%2x", j); + for (i = 0; i < 16; i++) { + i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1); + printf("\t%2x", val); + } + j += 0x10; + } + printf("\nEXT Page 2"); + + val = PFUZE100_PAGE_REGISTER_PAGE2; + if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, + &val, 1)) { + puts("i2c write failed\n"); + return 0; + } + + for (j = 0x80; j < 0x100; ) { + printf("\n%2x", j); + for (i = 0; i < 16; i++) { + i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1); + printf("\t%2x", val); + } + j += 0x10; + } + printf("\n"); + } +#endif + /* get device programmed state */ + val = PFUZE100_PAGE_REGISTER_PAGE1; + if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) { + puts("i2c write failed\n"); + return 0; + } + if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) { + puts("i2c fuse_por read failed\n"); + return 0; + } + if (val & PFUZE100_FUSE_POR_M) + programmed++; + + if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) { + puts("i2c fuse_por read failed\n"); + return programmed; + } + if (val & PFUZE100_FUSE_POR_M) + programmed++; + + if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) { + puts("i2c fuse_por read failed\n"); + return programmed; + } + if (val & PFUZE100_FUSE_POR_M) + programmed++; + + switch (programmed) { + case 0: + printf("PMIC: not programmed\n"); + break; + case 3: + printf("PMIC: programmed\n"); + break; + default: + printf("PMIC: undefined programming state\n"); + break; + } + + /* The following is needed during production */ + if (programmed != 3) { + /* set VGEN1 to 1.2V */ + val = PFUZE100_VGEN1_VAL; + if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_VGEN1CTL, 1, + &val, 1)) { + puts("i2c write failed\n"); + return programmed; + } + + /* set SWBST to 5.0V */ + val = PFUZE100_SWBST_VAL; + if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_SWBSTCTL, 1, + &val, 1)) { + puts("i2c write failed\n"); + } + } + return programmed; +} + +int pf0100_prog(void) +{ + unsigned char bus = 1; + unsigned char val; + unsigned int i; + + if (pmic_init() == 3) { + puts("PMIC already programmed, exiting\n"); + return CMD_RET_FAILURE; + } + /* set up gpio to manipulate vprog, initially off */ + imx_iomux_v3_setup_multiple_pads(pmic_prog_pads, + ARRAY_SIZE(pmic_prog_pads)); + gpio_direction_output(PMIC_PROG_VOLTAGE, 0); + + if (!((0 == i2c_set_bus_num(bus)) && + (0 == i2c_probe(PFUZE100_I2C_ADDR)))) { + puts("i2c bus failed\n"); + return CMD_RET_FAILURE; + } + + for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) { + switch (pmic_otp_prog[i].cmd) { + case pmic_i2c: + val = (unsigned char) (pmic_otp_prog[i].value & 0xff); + if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg, + 1, &val, 1)) { + printf("i2c write failed, reg 0x%2x, value 0x%2x\n", + pmic_otp_prog[i].reg, val); + return CMD_RET_FAILURE; + } + break; + case pmic_delay: + udelay(pmic_otp_prog[i].value * 1000); + break; + case pmic_vpgm: + gpio_direction_output(PMIC_PROG_VOLTAGE, + pmic_otp_prog[i].value); + break; + case pmic_pwr: + /* TODO */ + break; + } + } + return CMD_RET_SUCCESS; +} + +int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + int ret; + puts("Programming PMIC OTP..."); + ret = pf0100_prog(); + if (ret == CMD_RET_SUCCESS) + puts("done.\n"); + else + puts("failed.\n"); + return ret; +} + +U_BOOT_CMD( + pf0100_otp_prog, 1, 0, do_pf0100_prog, + "Program the OTP fuses on the PMIC PF0100", + "" +); |