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icE1usb fw/misc: Add support for GPIO special function 

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: If694fc94fd0bdedc87f00fbf1e13eb517fed67f6
This commit is contained in:
Sylvain Munaut 2022-09-01 17:53:19 +02:00
parent 5398910555
commit f5e51f5d9f
2 changed files with 26 additions and 10 deletions
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35
firmware/ice40-riscv/icE1usb/misc.c
View File

@ -15,10 +15,14 @@
struct misc {
uint32_t warmboot;
struct {
uint16_t oe_out;
uint8_t in;
uint8_t _rsvd;
union {
struct {
uint8_t out;
uint8_t oe;
uint8_t in;
uint8_t sfn;
};
uint32_t reg;
} gpio;
uint32_t e1_led;
uint32_t _rsvd;
@ -50,26 +54,37 @@ pdm_set(int chan, bool enable, unsigned value, bool normalize)
}
void
gpio_sfn(int n, bool sfn)
{
uint32_t mask = 0x01000000 << n;
if (sfn)
misc_regs->gpio.reg |= mask;
else
misc_regs->gpio.reg &= ~mask;
}
void
gpio_dir(int n, bool output)
{
uint16_t mask = 256 << n;
uint32_t mask = 0x00000100 << n;
if (output)
misc_regs->gpio.oe_out |= mask;
misc_regs->gpio.reg |= mask;
else
misc_regs->gpio.oe_out &= ~mask;
misc_regs->gpio.reg &= ~mask;
}
void
gpio_out(int n, bool val)
{
uint16_t mask = 1 << n;
uint32_t mask = 0x00000001 << n;
if (val)
misc_regs->gpio.oe_out |= mask;
misc_regs->gpio.reg |= mask;
else
misc_regs->gpio.oe_out &= ~mask;
misc_regs->gpio.reg &= ~mask;
}
bool

1
firmware/ice40-riscv/icE1usb/misc.h
View File

@ -26,6 +26,7 @@ enum pdm_chan {
void pdm_set(int chan, bool enable, unsigned value, bool normalize);
void gpio_sfn(int n, bool sfn);
void gpio_dir(int n, bool output);
void gpio_out(int n, bool val);
bool gpio_in(int n);