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authorBo Shen <voice.shen@atmel.com>2012-05-20 15:50:00 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-07-07 14:07:30 +0200
commit2b3b1c668be539d897d2a9352bc8dca54467f425 (patch)
tree52510f9161b017f898b984ea86c5ad0ebc4bde78 /drivers/gpio
parent81f40345d1d5c5ba04620873e3ca0bc60b6b2fe0 (diff)
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ATMEL/PIO: Enable new feature of PIO on Atmel device
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>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/at91_gpio.c125
1 files changed, 123 insertions, 2 deletions
diff --git a/drivers/gpio/at91_gpio.c b/drivers/gpio/at91_gpio.c
index be2a026..ac3b322 100644
--- a/drivers/gpio/at91_gpio.c
+++ b/drivers/gpio/at91_gpio.c
@@ -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.
@@ -162,13 +220,76 @@ 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