Merge with git://www.denx.de/git/u-boot.git

1 files changed, 214 insertions, 0 deletions

diff --git a/cpu/ppc4xx/gpio.c b/cpu/ppc4xx/gpio.c
new file mode 100644
index 0000000..dd84e58
--- /dev/null
+++ b/cpu/ppc4xx/gpio.c
@@ -0,0 +1,214 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+
+#if defined(CFG_440_GPIO_TABLE)
+gpio_param_s gpio_tab[GPIO_GROUP_MAX][GPIO_MAX] = CFG_440_GPIO_TABLE;
+#endif
+
+#if defined(GPIO0_OSRL)
+/* Only some 4xx variants support alternate funtions on the GPIO's */
+void gpio_config(int pin, int in_out, int gpio_alt, int out_val)
+{
+	u32 mask;
+	u32 mask2;
+	u32 val;
+	u32 offs = 0;
+	u32 offs2 = 0;
+	int pin2 = pin << 1;
+
+	if (pin >= GPIO_MAX) {
+		offs = 0x100;
+		pin -= GPIO_MAX;
+	}
+
+	if (pin >= GPIO_MAX/2) {
+		offs2 = 0x100;
+		pin2 = (pin - GPIO_MAX/2) << 1;
+	}
+
+	mask = 0x80000000 >> pin;
+	mask2 = 0xc0000000 >> (pin2 << 1);
+
+	/* first set TCR to 0 */
+	out32(GPIO0_TCR + offs, in32(GPIO0_TCR + offs) & ~mask);
+
+	if (in_out == GPIO_OUT) {
+		val = in32(GPIO0_OSRL + offs + offs2) & ~mask2;
+		switch (gpio_alt) {
+		case GPIO_ALT1:
+			val |= GPIO_ALT1_SEL >> pin2;
+			break;
+		case GPIO_ALT2:
+			val |= GPIO_ALT2_SEL >> pin2;
+			break;
+		case GPIO_ALT3:
+			val |= GPIO_ALT3_SEL >> pin2;
+			break;
+		}
+		out32(GPIO0_OSRL + offs + offs2, val);
+
+		/* setup requested output value */
+		if (out_val == GPIO_OUT_0)
+			out32(GPIO0_OR + offs, in32(GPIO0_OR + offs) & ~mask);
+		else if (out_val == GPIO_OUT_1)
+			out32(GPIO0_OR + offs, in32(GPIO0_OR + offs) | mask);
+
+		/* now configure TCR to drive output if selected */
+		out32(GPIO0_TCR + offs, in32(GPIO0_TCR + offs) | mask);
+	} else {
+		val = in32(GPIO0_ISR1L + offs + offs2) & ~mask2;
+		val |= GPIO_IN_SEL >> pin2;
+		out32(GPIO0_ISR1L + offs + offs2, val);
+	}
+}
+#endif /* GPIO_OSRL */
+
+void gpio_write_bit(int pin, int val)
+{
+	u32 offs = 0;
+
+	if (pin >= GPIO_MAX) {
+		offs = 0x100;
+		pin -= GPIO_MAX;
+	}
+
+	if (val)
+		out32(GPIO0_OR + offs, in32(GPIO0_OR + offs) | GPIO_VAL(pin));
+	else
+		out32(GPIO0_OR + offs, in32(GPIO0_OR + offs) & ~GPIO_VAL(pin));
+}
+
+#if defined(CFG_440_GPIO_TABLE)
+void gpio_set_chip_configuration(void)
+{
+	unsigned char i=0, j=0, offs=0, gpio_core;
+	unsigned long reg, core_add;
+
+	for (gpio_core=0; gpio_core<GPIO_GROUP_MAX; gpio_core++) {
+		j = 0;
+		offs = 0;
+		/* GPIO config of the GPIOs 0 to 31 */
+		for (i=0; i<GPIO_MAX; i++, j++) {
+			if (i == GPIO_MAX/2) {
+				offs = 4;
+				j = i-16;
+			}
+
+			core_add = gpio_tab[gpio_core][i].add;
+
+			if ((gpio_tab[gpio_core][i].in_out == GPIO_IN) ||
+			    (gpio_tab[gpio_core][i].in_out == GPIO_BI)) {
+
+				switch (gpio_tab[gpio_core][i].alt_nb) {
+				case GPIO_SEL:
+					break;
+
+				case GPIO_ALT1:
+					reg = in32(GPIO_IS1(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_IN_SEL >> (j*2));
+					out32(GPIO_IS1(core_add+offs), reg);
+					break;
+
+				case GPIO_ALT2:
+					reg = in32(GPIO_IS2(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_IN_SEL >> (j*2));
+					out32(GPIO_IS2(core_add+offs), reg);
+					break;
+
+				case GPIO_ALT3:
+					reg = in32(GPIO_IS3(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_IN_SEL >> (j*2));
+					out32(GPIO_IS3(core_add+offs), reg);
+					break;
+				}
+			}
+
+			if ((gpio_tab[gpio_core][i].in_out == GPIO_OUT) ||
+			    (gpio_tab[gpio_core][i].in_out == GPIO_BI)) {
+
+				switch (gpio_tab[gpio_core][i].alt_nb) {
+				case GPIO_SEL:
+					if (gpio_core == GPIO0) {
+						reg = in32(GPIO0_TCR) | (0x80000000 >> (j));
+						out32(GPIO0_TCR, reg);
+					}
+
+					if (gpio_core == GPIO1) {
+						reg = in32(GPIO1_TCR) | (0x80000000 >> (j));
+						out32(GPIO1_TCR, reg);
+					}
+
+					reg = in32(GPIO_OS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					out32(GPIO_OS(core_add+offs), reg);
+					reg = in32(GPIO_TS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					out32(GPIO_TS(core_add+offs), reg);
+					break;
+
+				case GPIO_ALT1:
+					reg = in32(GPIO_OS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_ALT1_SEL >> (j*2));
+					out32(GPIO_OS(core_add+offs), reg);
+					reg = in32(GPIO_TS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_ALT1_SEL >> (j*2));
+					out32(GPIO_TS(core_add+offs), reg);
+					break;
+
+				case GPIO_ALT2:
+					reg = in32(GPIO_OS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_ALT2_SEL >> (j*2));
+					out32(GPIO_OS(core_add+offs), reg);
+					reg = in32(GPIO_TS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_ALT2_SEL >> (j*2));
+					out32(GPIO_TS(core_add+offs), reg);
+					break;
+
+				case GPIO_ALT3:
+					reg = in32(GPIO_OS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_ALT3_SEL >> (j*2));
+					out32(GPIO_OS(core_add+offs), reg);
+					reg = in32(GPIO_TS(core_add+offs))
+						& ~(GPIO_MASK >> (j*2));
+					reg = reg | (GPIO_ALT3_SEL >> (j*2));
+					out32(GPIO_TS(core_add+offs), reg);
+					break;
+				}
+			}
+		}
+	}
+}
+#endif /* CFG_440_GPIO_TABLE */