diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/fsp_baytrail/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/fsp_baytrail/baytrail/gpio.h | 4 | ||||
| -rw-r--r-- | src/soc/intel/fsp_baytrail/gpio.c | 111 |
3 files changed, 115 insertions, 1 deletions
diff --git a/src/soc/intel/fsp_baytrail/Makefile.inc b/src/soc/intel/fsp_baytrail/Makefile.inc index 598deb4b33..fcbe6e7e9e 100644 --- a/src/soc/intel/fsp_baytrail/Makefile.inc +++ b/src/soc/intel/fsp_baytrail/Makefile.inc @@ -42,6 +42,7 @@ romstage-y += iosf.c ramstage-y += northcluster.c ramstage-y += ramstage.c ramstage-y += gpio.c +romstage-y += gpio.c ramstage-y += pmutil.c romstage-y += raminit.c ramstage-y += raminit.c diff --git a/src/soc/intel/fsp_baytrail/baytrail/gpio.h b/src/soc/intel/fsp_baytrail/baytrail/gpio.h index 957b0defd8..e15aeb886c 100644 --- a/src/soc/intel/fsp_baytrail/baytrail/gpio.h +++ b/src/soc/intel/fsp_baytrail/baytrail/gpio.h @@ -324,6 +324,10 @@ struct gpio_bank { void setup_soc_gpios(struct soc_gpio_config *config); /* This function is weak and can be overridden by a mainboard function. */ struct soc_gpio_config* mainboard_get_gpios(void); +uint8_t read_score_gpio(uint8_t gpio_num); +uint8_t read_ssus_gpio(uint8_t gpio_num); +void configure_ssus_gpio(uint8_t gpio_num, uint32_t pconf0, uint32_t pad_val); +void configure_score_gpio(uint8_t gpio_num, uint32_t pconf0, uint32_t pad_val); /* Functions / defines for changing GPIOs in romstage */ /* SCORE Pad definitions. */ diff --git a/src/soc/intel/fsp_baytrail/gpio.c b/src/soc/intel/fsp_baytrail/gpio.c index c12c937c1b..aeb0998a40 100644 --- a/src/soc/intel/fsp_baytrail/gpio.c +++ b/src/soc/intel/fsp_baytrail/gpio.c @@ -23,7 +23,15 @@ #include <baytrail/pmc.h> #include <baytrail/smm.h> -/* GPIO-to-Pad LUTs */ +/* + * GPIO-to-Pad LUTs + * + * These tables translate the GPIO number to the pad configuration register + * for that GPIO in the memory-mapped pad configuration registers. + * See the tables: + * PCU iLB GPIO CFIO_SCORE Address Map + * PCU iLB GPIO CFIO_SSUS Address Map + */ static const u8 gpncore_gpio_to_pad[GPNCORE_COUNT] = { 19, 18, 17, 20, 21, 22, 24, 25, /* [ 0: 7] */ 23, 16, 14, 15, 12, 26, 27, 1, /* [ 8:15] */ @@ -84,6 +92,8 @@ static const struct gpio_bank gpssus_bank = { .gpio_f1_range_end = GPSSUS_GPIO_F1_RANGE_END, }; +#ifndef __PRE_RAM__ + static void setup_gpios(const struct soc_gpio_map *gpios, const struct gpio_bank *bank) { @@ -238,3 +248,102 @@ struct soc_gpio_config* __attribute__((weak)) mainboard_get_gpios(void) printk(BIOS_DEBUG, "Default/empty GPIO config\n"); return NULL; } +#endif /* #ifndef __PRE_RAM__ */ + +/** \brief returns the input / output value from an SCORE GPIO + * + * @param gpio_num The GPIO number being read + * @return The current input or output value of the GPIO + */ +uint8_t read_score_gpio(uint8_t gpio_num) +{ + uint8_t retval = 0; + if (gpio_num < GPSCORE_COUNT) + retval = score_get_gpio(gpscore_gpio_to_pad[gpio_num]); + + return retval; +} + +/** \brief returns the input / output value from an SSUS GPIO + * + * @param gpio_num The GPIO number being read + * @return The current input or output value of the GPIO + */ +uint8_t read_ssus_gpio(uint8_t gpio_num) +{ + uint8_t retval = 0; + if (gpio_num < GPSSUS_COUNT) + retval = ssus_get_gpio(gpssus_gpio_to_pad[gpio_num]); + + return retval; +} + +/** \brief Sets up the function, pulls, and Input/Output of a Baytrail + * SSUS (S5) or SCORE (S0) GPIO + * + * @param ssus_gpio 1 if SSUS GPIO is being configured 0 if SCORE GPIO + * @param gpio_num The GPIO number being configured + * @param pconf0 function, pull direction, and pull value + * function: PAD_FUNC0 - PAD_FUNC7 + * pull assign: PAD_PULL_DISABLE / PAD_PULL_UP / PAD_PULL_DOWN + * pull_value: PAD_PU_2K / PAD_PU_10K / PAD_PU_20K / PAD_PU_40K + * @param pad_val input / output state and pad value + * io state: PAD_VAL_INPUT / PAD_VAL_OUTPUT + * pad value: PAD_VAL_HIGH / PAD_VAL_LOW + */ +static void configure_ssus_score_gpio(uint8_t ssus_gpio, uint8_t gpio_num, + uint32_t pconf0, uint32_t pad_val) +{ + uint32_t reg; + uint32_t pad_addr; + if (ssus_gpio) + pad_addr = ssus_pconf0(gpssus_gpio_to_pad[gpio_num]); + else + pad_addr = score_pconf0(gpscore_gpio_to_pad[gpio_num]); + + if ((ssus_gpio && gpio_num >= GPSSUS_COUNT) || + (gpio_num >= GPSCORE_COUNT)){ + printk(BIOS_WARNING,"Warning: Invalid %s GPIO specified (%d)\n", + ssus_gpio ? "SSUS" : "SCORE", gpio_num); + return; + } + + /* + * Pad Configuration 0 Register + * 2:0 - func_pin_mux + * 8:7 - Pull assignment: 00 - Non pull 01 - Pull Up 10 - Pull down + * 11 - reserved + * 10:9 - Pull strength: 00 - 2K 01 - 10K 10 - 20K 11 - 40K + */ + reg = PAD_CONFIG0_DEFAULT; + reg |= pconf0 & 0x787; + write32(pad_addr + PAD_CONF0_REG, reg); + + /* + * Pad Value Register + * 0: Pad value + * 1: output enable (0 is enabled) + * 2: input enable (0 is enabled) + */ + reg = read32(pad_addr + PAD_VAL_REG); + reg &= ~0x7; + reg |= pad_val & 0x7; + write32(pad_addr + PAD_VAL_REG, reg); +} + +/** \brief Sets up the function, pulls, and Input/Output of a Baytrail S5 GPIO + * + */ +void configure_ssus_gpio(uint8_t gpio_num, uint32_t pconf0, uint32_t pad_val) +{ + configure_ssus_score_gpio(1, gpio_num, pconf0, pad_val); +} + +/** \brief Sets up the function, pulls, and Input/Output of a Baytrail S5 GPIO + * + */ +void configure_score_gpio(uint8_t gpio_num, uint32_t pconf0, uint32_t pad_val) +{ + configure_ssus_score_gpio(0, gpio_num, pconf0, pad_val); +} + |