leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ATMEL/PIO: Enable new feature of PIO on Atmel device

Browse Source 
Enable new PIO feature supported by Atmel SoC.
Using CPU_HAS_PIO3 micro to enable PIO new feature.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Bo Shen
2012-05-20 15:50:00 +00:00
committed by Albert ARIBAUD
parent 81f40345d1
commit 2b3b1c668b
2 changed files with 167 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

125
drivers/gpio/at91_gpio.c
View File

@@ -86,7 +86,14 @@ int at91_set_a_periph(unsigned port, unsigned pin, int use_pullup)
mask = 1 << pin;
writel(mask, &pio->port[port].idr);
at91_set_pio_pullup(port, pin, use_pullup);
#if defined(CPU_HAS_PIO3)
writel(readl(&pio->port[port].abcdsr1) & ~mask,
&pio->port[port].abcdsr1);
writel(readl(&pio->port[port].abcdsr2) & ~mask,
&pio->port[port].abcdsr2);
#else
writel(mask, &pio->port[port].asr);
#endif
writel(mask, &pio->port[port].pdr);
}
return 0;
@@ -104,12 +111,63 @@ int at91_set_b_periph(unsigned port, unsigned pin, int use_pullup)
mask = 1 << pin;
writel(mask, &pio->port[port].idr);
at91_set_pio_pullup(port, pin, use_pullup);
#if defined(CPU_HAS_PIO3)
writel(readl(&pio->port[port].abcdsr1) | mask,
&pio->port[port].abcdsr1);
writel(readl(&pio->port[port].abcdsr2) & ~mask,
&pio->port[port].abcdsr2);
#else
writel(mask, &pio->port[port].bsr);
#endif
writel(mask, &pio->port[port].pdr);
}
return 0;
}
#if defined(CPU_HAS_PIO3)
/*
* mux the pin to the "C" internal peripheral role.
*/
int at91_set_c_periph(unsigned port, unsigned pin, int use_pullup)
{
at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
u32 mask;
if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
mask = 1 << pin;
writel(mask, &pio->port[port].idr);
at91_set_pio_pullup(port, pin, use_pullup);
writel(readl(&pio->port[port].abcdsr1) & ~mask,
&pio->port[port].abcdsr1);
writel(readl(&pio->port[port].abcdsr2) | mask,
&pio->port[port].abcdsr2);
writel(mask, &pio->port[port].pdr);
}
return 0;
}
/*
* mux the pin to the "D" internal peripheral role.
*/
int at91_set_d_periph(unsigned port, unsigned pin, int use_pullup)
{
at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
u32 mask;
if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
mask = 1 << pin;
writel(mask, &pio->port[port].idr);
at91_set_pio_pullup(port, pin, use_pullup);
writel(readl(&pio->port[port].abcdsr1) | mask,
&pio->port[port].abcdsr1);
writel(readl(&pio->port[port].abcdsr2) | mask,
&pio->port[port].abcdsr2);
writel(mask, &pio->port[port].pdr);
}
return 0;
}
#endif
/*
* mux the pin to the gpio controller (instead of "A" or "B" peripheral), and
* configure it for an input.
@@ -162,14 +220,77 @@ int at91_set_pio_deglitch(unsigned port, unsigned pin, int is_on)
if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
mask = 1 << pin;
if (is_on)
if (is_on) {
#if defined(CPU_HAS_PIO3)
writel(mask, &pio->port[port].ifscdr);
#endif
writel(mask, &pio->port[port].ifer);
else
} else {
writel(mask, &pio->port[port].ifdr);
}
}
return 0;
}
#if defined(CPU_HAS_PIO3)
/*
* enable/disable the debounce filter.
*/
int at91_set_pio_debounce(unsigned port, unsigned pin, int is_on, int div)
{
at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
u32 mask;
if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
mask = 1 << pin;
if (is_on) {
writel(mask, &pio->port[port].ifscer);
writel(div & PIO_SCDR_DIV, &pio->port[port].scdr);
writel(mask, &pio->port[port].ifer);
} else {
writel(mask, &pio->port[port].ifdr);
}
}
return 0;
}
/*
* enable/disable the pull-down.
* If pull-up already enabled while calling the function, we disable it.
*/
int at91_set_pio_pulldown(unsigned port, unsigned pin, int is_on)
{
at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
u32 mask;
if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
mask = 1 << pin;
writel(mask, &pio->port[port].pudr);
if (is_on)
writel(mask, &pio->port[port].ppder);
else
writel(mask, &pio->port[port].ppddr);
}
return 0;
}
/*
* disable Schmitt trigger
*/
int at91_set_pio_disable_schmitt_trig(unsigned port, unsigned pin)
{
at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
u32 mask;
if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
mask = 1 << pin;
writel(readl(&pio->port[port].schmitt) | mask,
&pio->port[port].schmitt);
}
return 0;
}
#endif
/*
* enable/disable the multi-driver. This is only valid for output and
* allows the output pin to run as an open collector output.