diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/apollolake/gpio.c | 32 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/include/soc/gpio_defs.h | 1 |
2 files changed, 33 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/gpio.c b/src/soc/intel/apollolake/gpio.c index 699c8fea28..a3ffb3de0f 100644 --- a/src/soc/intel/apollolake/gpio.c +++ b/src/soc/intel/apollolake/gpio.c @@ -19,6 +19,7 @@ #include <gpio.h> #include <soc/gpio.h> #include <soc/iosf.h> +#include <soc/itss.h> #include <soc/pm.h> /* This list must be in order, from highest pad numbers, to lowest pad numbers*/ @@ -53,12 +54,43 @@ static const struct pad_community *gpio_get_community(uint16_t pad) return map; } +static void gpio_configure_itss(const struct pad_config *cfg, + uint16_t port, uint16_t pad_cfg_offset) +{ + int irq; + + /* Set up ITSS polarity if pad is routed to APIC. + * + * The ITSS takes only active high interrupt signals. Therefore, + * if the pad configuration indicates an inversion assume the + * intent is for the ITSS polarity. Before forwarding on the + * request to the APIC there's an inversion setting for how the + * signal is forwarded to the APIC. Honor the inversion setting + * in the GPIO pad configuration so that a hardware active low + * signal looks that way to the APIC (double inversion). + */ + if (!(cfg->config0 & PAD_CFG0_ROUTE_IOAPIC)) + return; + + irq = iosf_read(port, pad_cfg_offset + sizeof(uint32_t)); + irq &= PAD_CFG1_IRQ_MASK; + if (!irq) { + printk(BIOS_ERR, "GPIO %u doesn't support APIC routing,\n", + cfg->pad); + return; + } + + itss_set_irq_polarity(irq, !!(cfg->config0 & PAD_CFG0_RX_POL_INVERT)); +} + void gpio_configure_pad(const struct pad_config *cfg) { const struct pad_community *comm = gpio_get_community(cfg->pad); uint16_t config_offset = PAD_CFG_OFFSET(cfg->pad - comm->first_pad); iosf_write(comm->port, config_offset, cfg->config0); iosf_write(comm->port, config_offset + sizeof(uint32_t), cfg->config1); + + gpio_configure_itss(cfg, comm->port, config_offset); } void gpio_configure_pads(const struct pad_config *cfg, size_t num_pads) diff --git a/src/soc/intel/apollolake/include/soc/gpio_defs.h b/src/soc/intel/apollolake/include/soc/gpio_defs.h index c6e2c3cf91..48e08e783e 100644 --- a/src/soc/intel/apollolake/include/soc/gpio_defs.h +++ b/src/soc/intel/apollolake/include/soc/gpio_defs.h @@ -75,6 +75,7 @@ #define PAD_CFG0_RESET_PLTRST (2 << 30) #define PAD_CFG0_RESET_RSMRST (3 << 30) +#define PAD_CFG1_IRQ_MASK (0xff << 0) #define PAD_CFG1_PULL_MASK (0xf << 10) #define PAD_CFG1_PULL_NONE (0x0 << 10) #define PAD_CFG1_PULL_DN_5K (0x2 << 10) |