diff options
Diffstat (limited to 'driver/ppc/syv682x.c')
-rw-r--r-- | driver/ppc/syv682x.c | 120 |
1 files changed, 85 insertions, 35 deletions
diff --git a/driver/ppc/syv682x.c b/driver/ppc/syv682x.c index 3d2142e76f..31f6530212 100644 --- a/driver/ppc/syv682x.c +++ b/driver/ppc/syv682x.c @@ -4,6 +4,7 @@ */ /* Silergy SYV682x USB-C Power Path Controller */ +#include "atomic.h" #include "common.h" #include "config.h" #include "console.h" @@ -19,17 +20,20 @@ #include "util.h" #define SYV682X_FLAGS_SOURCE_ENABLED BIT(0) +#define SYV682X_FLAGS_SINK_ENABLED BIT(1) /* 0 -> CC1, 1 -> CC2 */ -#define SYV682X_FLAGS_CC_POLARITY BIT(1) -#define SYV682X_FLAGS_VBUS_PRESENT BIT(2) -#define SYV682X_FLAGS_OCP BIT(3) -#define SYV682X_FLAGS_OVP BIT(4) -#define SYV682X_FLAGS_5V_OC BIT(5) -#define SYV682X_FLAGS_RVS BIT(6) -#define SYV682X_FLAGS_VCONN_OCP BIT(7) +#define SYV682X_FLAGS_CC_POLARITY BIT(2) +#define SYV682X_FLAGS_VBUS_PRESENT BIT(3) +#define SYV682X_FLAGS_TSD BIT(4) +#define SYV682X_FLAGS_OVP BIT(5) +#define SYV682X_FLAGS_5V_OC BIT(6) +#define SYV682X_FLAGS_RVS BIT(7) +#define SYV682X_FLAGS_VCONN_OCP BIT(8) static uint32_t irq_pending; /* Bitmask of ports signaling an interrupt. */ -static uint8_t flags[CONFIG_USB_PD_PORT_MAX_COUNT]; +static uint32_t flags[CONFIG_USB_PD_PORT_MAX_COUNT]; +/* Running count of sink ocp events */ +static uint32_t sink_ocp_count[CONFIG_USB_PD_PORT_MAX_COUNT]; static timestamp_t vbus_oc_timer[CONFIG_USB_PD_PORT_MAX_COUNT]; static timestamp_t vconn_oc_timer[CONFIG_USB_PD_PORT_MAX_COUNT]; @@ -41,6 +45,8 @@ static timestamp_t vconn_oc_timer[CONFIG_USB_PD_PORT_MAX_COUNT]; /* Deglitch in ms of sourcing overcurrent detection */ #define SOURCE_OC_DEGLITCH_MS 100 #define VCONN_OC_DEGLITCH_MS 100 +/* Max. number of OC events allowed before disabling port */ +#define OCP_COUNT_LIMIT 3 #if SOURCE_OC_DEGLITCH_MS < INTERRUPT_DELAY_MS #error "SOURCE_OC_DEGLITCH_MS should be at least INTERRUPT_DELAY_MS" @@ -55,6 +61,8 @@ static timestamp_t vconn_oc_timer[CONFIG_USB_PD_PORT_MAX_COUNT]; #define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) +static int syv682x_vbus_sink_enable(int port, int enable); + static int syv682x_init(int port); static void syv682x_interrupt_delayed(int port, int delay); @@ -172,10 +180,12 @@ static int syv682x_vbus_source_enable(int port, int enable) if (rv) return rv; - if (enable) - flags[port] |= SYV682X_FLAGS_SOURCE_ENABLED; - else - flags[port] &= ~SYV682X_FLAGS_SOURCE_ENABLED; + if (enable) { + atomic_or(&flags[port], SYV682X_FLAGS_SOURCE_ENABLED); + atomic_clear_bits(&flags[port], SYV682X_FLAGS_SINK_ENABLED); + } else { + atomic_clear_bits(&flags[port], SYV682X_FLAGS_SOURCE_ENABLED); + } #if defined(CONFIG_USB_CHARGER) && defined(CONFIG_USB_PD_VBUS_DETECT_PPC) /* @@ -194,11 +204,11 @@ static bool syv682x_interrupt_filter(int port, int regval, int regmask, { if (regval & regmask) { if (!(flags[port] & flagmask)) { - flags[port] |= flagmask; + atomic_or(&flags[port], flagmask); return true; } } else { - flags[port] &= ~flagmask; + atomic_clear_bits(&flags[port], flagmask); } return false; } @@ -215,7 +225,8 @@ static void syv682x_handle_status_interrupt(int port, int regval) /* An FRS will automatically enable the source path */ if (IS_ENABLED(CONFIG_USB_PD_FRS_PPC) && (regval & SYV682X_STATUS_FRS)) { - flags[port] |= SYV682X_FLAGS_SOURCE_ENABLED; + atomic_or(&flags[port], SYV682X_FLAGS_SOURCE_ENABLED); + atomic_clear_bits(&flags[port], SYV682X_FLAGS_SINK_ENABLED); /* * Workaround for bug in SYV692. * @@ -232,10 +243,6 @@ static void syv682x_handle_status_interrupt(int port, int regval) pd_got_frs_signal(port); } - /* These conditions automatically turn off VBUS sourcing */ - if (regval & (SYV682X_STATUS_OVP | SYV682X_STATUS_TSD)) - flags[port] &= ~SYV682X_FLAGS_SOURCE_ENABLED; - /* * 5V OC is actually notifying that it is current limiting * to 3.3A. If this happens for a long time, we will trip TSD @@ -252,22 +259,53 @@ static void syv682x_handle_status_interrupt(int port, int regval) } else if ((regval & SYV682X_STATUS_OC_5V) && (get_time().val > vbus_oc_timer[port].val)) { vbus_oc_timer[port].val = UINT64_MAX; - flags[port] &= ~SYV682X_FLAGS_5V_OC; + atomic_clear_bits(&flags[port], SYV682X_FLAGS_5V_OC); syv682x_vbus_source_enable(port, 0); pd_handle_overcurrent(port); } - if (syv682x_interrupt_filter(port, regval, - SYV682X_STATUS_OC_HV | SYV682X_STATUS_TSD, - SYV682X_FLAGS_OCP)) - pd_handle_overcurrent(port); - - /* No PD handler for VBUS OVP/RVS events */ - + /* + * No PD handling for VBUS OVP or TSD events. + * For TSD, this means we are in danger of burning the device so turn + * everything off and leave it off. The power paths will be + * automatically disabled. + * In the case of OVP, the channels will be + * disabled but don't unset the sink flag, since a sink OCP can + * inadvertently cause an OVP, and we'd want to re-enable the sink + * path in that situation. + */ + if (syv682x_interrupt_filter(port, regval, SYV682X_STATUS_TSD, + SYV682X_FLAGS_TSD)) { + ppc_prints("TSD!", port); + atomic_clear_bits(&flags[port], + SYV682X_FLAGS_SOURCE_ENABLED | + SYV682X_FLAGS_SINK_ENABLED); + } if (syv682x_interrupt_filter(port, regval, SYV682X_STATUS_OVP, SYV682X_FLAGS_OVP)) { ppc_prints("VBUS OVP!", port); + atomic_clear_bits(&flags[port], SYV682X_FLAGS_SOURCE_ENABLED); + } + + /* + * HV OC is a hard limit that will disable the sink path (automatically + * removing this alert condition), so try re-enabling if we hit an OCP. + * If we get multiple OCPs, don't re-enable. The OCP counter is reset on + * the sink path being explicitly disabled or on a PPC init. + */ + if (regval & SYV682X_STATUS_OC_HV) { + ppc_prints("Sink OCP!", port); + atomic_add(&sink_ocp_count[port], 1); + if ((sink_ocp_count[port] < OCP_COUNT_LIMIT) && + (flags[port] & SYV682X_FLAGS_SINK_ENABLED)) { + syv682x_vbus_sink_enable(port, 1); + } else { + ppc_prints("Disable sink", port); + atomic_clear_bits(&flags[port], + SYV682X_FLAGS_SINK_ENABLED); + } } + if (syv682x_interrupt_filter(port, regval, SYV682X_STATUS_RVS, SYV682X_FLAGS_RVS)) { ppc_prints("VBUS Reverse Voltage!", port); @@ -292,7 +330,8 @@ static int syv682x_handle_control_4_interrupt(int port, int regval) } else if ((regval & SYV682X_CONTROL_4_VCONN_OCP) && (get_time().val > vconn_oc_timer[port].val)) { vconn_oc_timer[port].val = UINT64_MAX; - flags[port] &= ~SYV682X_FLAGS_VCONN_OCP; + atomic_clear_bits(&flags[port], SYV682X_FLAGS_VCONN_OCP); + /* Disable VCONN */ regval &= ~(SYV682X_CONTROL_4_VCONN2 | SYV682X_CONTROL_4_VCONN1); @@ -322,11 +361,20 @@ static int syv682x_vbus_sink_enable(int port, int enable) int regval; int rv; - if (!enable && syv682x_is_sourcing_vbus(port)) { + if (!enable) { + atomic_clear(&sink_ocp_count[port]); + atomic_clear_bits(&flags[port], SYV682X_FLAGS_SINK_ENABLED); /* * We're currently a source, so nothing more to do */ - return EC_SUCCESS; + if (syv682x_is_sourcing_vbus(port)) + return EC_SUCCESS; + } else if (sink_ocp_count[port] > OCP_COUNT_LIMIT) { + /* + * Don't re-enable the channel until an explicit sink disable + * resets the ocp counter. + */ + return EC_ERROR_UNKNOWN; } /* @@ -345,7 +393,8 @@ static int syv682x_vbus_sink_enable(int port, int enable) SYV682X_CONTROL_1_PWR_ENB); /* Set sink current limit to the configured value */ regval |= CONFIG_SYV682X_HV_ILIM << SYV682X_HV_ILIM_BIT_SHIFT; - flags[port] &= ~SYV682X_FLAGS_SOURCE_ENABLED; + atomic_clear_bits(&flags[port], SYV682X_FLAGS_SOURCE_ENABLED); + atomic_or(&flags[port], SYV682X_FLAGS_SINK_ENABLED); } else { /* * No need to change the voltage path or channel direction. But, @@ -384,9 +433,9 @@ static int syv682x_is_vbus_present(int port) usb_charger_vbus_change(port, vbus); if (vbus) - flags[port] |= SYV682X_FLAGS_VBUS_PRESENT; + atomic_or(&flags[port], SYV682X_FLAGS_VBUS_PRESENT); else - flags[port] &= ~SYV682X_FLAGS_VBUS_PRESENT; + atomic_clear_bits(&flags[port], SYV682X_FLAGS_VBUS_PRESENT); #endif return vbus; @@ -438,9 +487,9 @@ static int syv682x_set_polarity(int port, int polarity) * polarity = CC1. */ if (polarity) - flags[port] |= SYV682X_FLAGS_CC_POLARITY; + atomic_or(&flags[port], SYV682X_FLAGS_CC_POLARITY); else - flags[port] &= ~SYV682X_FLAGS_CC_POLARITY; + atomic_clear_bits(&flags[port], SYV682X_FLAGS_CC_POLARITY); return EC_SUCCESS; } @@ -670,6 +719,7 @@ static int syv682x_init(int port) rv = read_reg(port, SYV682X_CONTROL_1_REG, &control_1); if (rv) return rv; + atomic_clear(&sink_ocp_count[port]); if (!syv682x_is_sink(control_1) || (status & SYV682X_STATUS_VSAFE_0V)) { |