diff options
Diffstat (limited to 'sys/dev/fdt/mvkpcie.c')
| -rw-r--r-- | sys/dev/fdt/mvkpcie.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/sys/dev/fdt/mvkpcie.c b/sys/dev/fdt/mvkpcie.c index b2b5ddd8520..0944d6a1e7e 100644 --- a/sys/dev/fdt/mvkpcie.c +++ b/sys/dev/fdt/mvkpcie.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mvkpcie.c,v 1.2 2020/05/22 18:48:42 kettenis Exp $ */ +/* $OpenBSD: mvkpcie.c,v 1.3 2020/05/22 20:14:04 patrick Exp $ */ /* * Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org> * Copyright (c) 2020 Patrick Wildt <patrick@blueri.se> @@ -262,6 +262,8 @@ mvkpcie_attach(struct device *parent, struct device *self, void *aux) struct mvkpcie_softc *sc = (struct mvkpcie_softc *)self; struct fdt_attach_args *faa = aux; struct pcibus_attach_args pba; + uint32_t *reset_gpio; + ssize_t reset_gpiolen; bus_addr_t iobase, iolimit; bus_addr_t membase, memlimit; uint32_t bus_range[2]; @@ -348,6 +350,24 @@ mvkpcie_attach(struct device *parent, struct device *self, void *aux) clock_set_assigned(sc->sc_node); clock_enable_all(sc->sc_node); + reset_gpiolen = OF_getproplen(sc->sc_node, "reset-gpios"); + if (reset_gpiolen > 0) { + /* Link training needs to be disabled during PCIe reset. */ + HCLR4(sc, PCIE_CORE_CTRL0, PCIE_CORE_CTRL0_LINK_TRAINING); + + reset_gpio = malloc(reset_gpiolen, M_TEMP, M_WAITOK); + OF_getpropintarray(sc->sc_node, "reset-gpios", reset_gpio, + reset_gpiolen); + + /* Issue PCIe reset. */ + gpio_controller_config_pin(reset_gpio, GPIO_CONFIG_OUTPUT); + gpio_controller_set_pin(reset_gpio, 1); + delay(10000); + gpio_controller_set_pin(reset_gpio, 0); + + free(reset_gpio, M_TEMP, reset_gpiolen); + } + reg = HREAD4(sc, CTRL_CORE_CONFIG); reg &= ~CTRL_CORE_CONFIG_MODE_MASK; reg |= CTRL_CORE_CONFIG_MODE_DIRECT; |