laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-e1-hardware/+/26907 ) Change subject: icE1usb fw: Add GPIO access functions ...................................................................... icE1usb fw: Add GPIO access functions The 32 bit register is split in different fields to speed up access to the 'in' field. The oe/out fields can't be split because all writes are 32 bit wide (i.e. no support for byte enable in the gateware) Signed-off-by: Sylvain Munaut &lt;tnt(a)246tNt.com&gt; Change-Id: Ic25377bb777e5d25939f0e8cfe6b7c6ef8641f6d --- M firmware/ice40-riscv/icE1usb/misc.c M firmware/ice40-riscv/icE1usb/misc.h 2 files changed, 38 insertions(+), 1 deletion(-) Approvals: laforge: Looks good to me, approved Jenkins Builder: Verified diff --git a/firmware/ice40-riscv/icE1usb/misc.c b/firmware/ice40-riscv/icE1usb/misc.c index bd9198a..50aec43 100644 --- a/firmware/ice40-riscv/icE1usb/misc.c +++ b/firmware/ice40-riscv/icE1usb/misc.c @@ -15,7 +15,11 @@ struct misc { uint32_t warmboot; - uint32_t gpio; + struct { + uint16_t oe_out; + uint8_t in; + uint8_t _rsvd; + } gpio; uint32_t e1_led; uint32_t _rsvd; struct { @@ -47,6 +51,35 @@ void +gpio_dir(int n, bool output) +{ + uint16_t mask = 256 << n; + + if (output) + misc_regs->gpio.oe_out |= mask; + else + misc_regs->gpio.oe_out &= ~mask; +} + +void +gpio_out(int n, bool val) +{ + uint16_t mask = 1 << n; + + if (val) + misc_regs->gpio.oe_out |= mask; + else + misc_regs->gpio.oe_out &= ~mask; +} + +bool +gpio_in(int n) +{ + return (misc_regs->gpio.in & (1 << n)) != 0; +} + + +void e1_led_run(void) { misc_regs->e1_led |= 0x100; diff --git a/firmware/ice40-riscv/icE1usb/misc.h b/firmware/ice40-riscv/icE1usb/misc.h index b4baef1..76d5a7d 100644 --- a/firmware/ice40-riscv/icE1usb/misc.h +++ b/firmware/ice40-riscv/icE1usb/misc.h @@ -26,6 +26,10 @@ void pdm_set(int chan, bool enable, unsigned value, bool normalize); +void gpio_dir(int n, bool output); +void gpio_out(int n, bool val); +bool gpio_in(int n); + void e1_led_run(void); void e1_led_pause(void); void e1_led_set(bool enable, uint8_t cfg); -- To view, visit https://gerrit.osmocom.org/c/osmo-e1-hardware/+/26907 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-e1-hardware Gerrit-Branch: master Gerrit-Change-Id: Ic25377bb777e5d25939f0e8cfe6b7c6ef8641f6d Gerrit-Change-Number: 26907 Gerrit-PatchSet: 2 Gerrit-Owner: tnt &lt;tnt(a)246tNt.com&gt; Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: laforge &lt;laforge(a)osmocom.org&gt; Gerrit-MessageType: merged