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authorKyösti Mälkki <kyosti.malkki@gmail.com>2015-05-11 20:58:18 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2015-05-14 16:41:57 +0200
commitd22206ac796b747ad1e790e2dc44cdf8832d66e8 (patch)
treeca3843e7b012f6cbcd21f9bcf3e7632a2d7655eb /src/superio
parent0430c69918ea463d601a40aa3865245e56e8fa9c (diff)
downloadcoreboot-d22206ac796b747ad1e790e2dc44cdf8832d66e8.tar.xz
superio/nct5104d: Handle shared GPIO/UART pins
Routing is decided based on enabled logical/virtual devices. For a valid devicetree, one should have only one of SP3 and GPIO0, and only one of SP4 and GPIO1, enabled at a time in configuration. Change-Id: I02017786aba9dd22d12403aaa71d7641f5bbf997 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/10177 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Diffstat (limited to 'src/superio')
-rw-r--r--src/superio/nuvoton/nct5104d/superio.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/superio/nuvoton/nct5104d/superio.c b/src/superio/nuvoton/nct5104d/superio.c
index f382c2c6be..01c1c2766d 100644
--- a/src/superio/nuvoton/nct5104d/superio.c
+++ b/src/superio/nuvoton/nct5104d/superio.c
@@ -81,6 +81,36 @@ static void set_irq_trigger_type(struct device *dev, bool trig_level)
pnp_write_config(dev, GLOBAL_OPTION_CR26, reg26);
}
+static void route_pins_to_uart(struct device *dev, bool to_uart)
+{
+ u8 reg;
+
+ reg = pnp_read_config(dev, 0x1c);
+
+ switch (dev->path.pnp.device) {
+ case NCT5104D_SP3:
+ case NCT5104D_GPIO0:
+ /* Route pins 33 - 40. */
+ if (to_uart)
+ reg |= (1 << 3);
+ else
+ reg &= ~(1 << 3);
+ break;
+ case NCT5104D_SP4:
+ case NCT5104D_GPIO1:
+ /* Route pins 41 - 48. */
+ if (to_uart)
+ reg |= (1 << 2);
+ else
+ reg &= ~(1 << 2);
+ break;
+ default:
+ break;
+ }
+
+ pnp_write_config(dev, 0x1c, reg);
+}
+
static void nct5104d_init(struct device *dev)
{
struct superio_nuvoton_nct5104d_config *conf = dev->chip_info;
@@ -93,10 +123,17 @@ static void nct5104d_init(struct device *dev)
switch(dev->path.pnp.device) {
case NCT5104D_SP1:
case NCT5104D_SP2:
+ set_irq_trigger_type(dev, conf->irq_trigger_type != 0);
+ break;
case NCT5104D_SP3:
case NCT5104D_SP4:
+ route_pins_to_uart(dev, true);
set_irq_trigger_type(dev, conf->irq_trigger_type != 0);
break;
+ case NCT5104D_GPIO0:
+ case NCT5104D_GPIO1:
+ route_pins_to_uart(dev, false);
+ break;
default:
break;
}