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Diffstat (limited to 'arch/powerpc/cpu/ppc4xx/gpio.c')
-rw-r--r--arch/powerpc/cpu/ppc4xx/gpio.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/ppc4xx/gpio.c b/arch/powerpc/cpu/ppc4xx/gpio.c
new file mode 100644
index 0000000..c0d351a
--- /dev/null
+++ b/arch/powerpc/cpu/ppc4xx/gpio.c
@@ -0,0 +1,255 @@
+/*
+ * (C) Copyright 2007-2008
+ * 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(CONFIG_SYS_4xx_GPIO_TABLE)
+gpio_param_s const gpio_tab[GPIO_GROUP_MAX][GPIO_MAX] = CONFIG_SYS_4xx_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 = 0x4;
+ pin2 = (pin - GPIO_MAX/2) << 1;
+ }
+
+ mask = 0x80000000 >> pin;
+ mask2 = 0xc0000000 >> pin2;
+
+ /* first set TCR to 0 */
+ out_be32((void *)GPIO0_TCR + offs, in_be32((void *)GPIO0_TCR + offs) & ~mask);
+
+ if (in_out == GPIO_OUT) {
+ val = in_be32((void *)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;
+ }
+ out_be32((void *)GPIO0_OSRL + offs + offs2, val);
+
+ /* setup requested output value */
+ if (out_val == GPIO_OUT_0)
+ out_be32((void *)GPIO0_OR + offs,
+ in_be32((void *)GPIO0_OR + offs) & ~mask);
+ else if (out_val == GPIO_OUT_1)
+ out_be32((void *)GPIO0_OR + offs,
+ in_be32((void *)GPIO0_OR + offs) | mask);
+
+ /* now configure TCR to drive output if selected */
+ out_be32((void *)GPIO0_TCR + offs,
+ in_be32((void *)GPIO0_TCR + offs) | mask);
+ } else {
+ val = in_be32((void *)GPIO0_ISR1L + offs + offs2) & ~mask2;
+ val |= GPIO_IN_SEL >> pin2;
+ out_be32((void *)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)
+ out_be32((void *)GPIO0_OR + offs,
+ in_be32((void *)GPIO0_OR + offs) | GPIO_VAL(pin));
+ else
+ out_be32((void *)GPIO0_OR + offs,
+ in_be32((void *)GPIO0_OR + offs) & ~GPIO_VAL(pin));
+}
+
+int gpio_read_out_bit(int pin)
+{
+ u32 offs = 0;
+
+ if (pin >= GPIO_MAX) {
+ offs = 0x100;
+ pin -= GPIO_MAX;
+ }
+
+ return (in_be32((void *)GPIO0_OR + offs) & GPIO_VAL(pin) ? 1 : 0);
+}
+
+int gpio_read_in_bit(int pin)
+{
+ u32 offs = 0;
+
+ if (pin >= GPIO_MAX) {
+ offs = 0x100;
+ pin -= GPIO_MAX;
+ }
+
+ return (in_be32((void *)GPIO0_IR + offs) & GPIO_VAL(pin) ? 1 : 0);
+}
+
+#if defined(CONFIG_SYS_4xx_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 = in_be32((void *)GPIO_IS1(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ reg = reg | (GPIO_IN_SEL >> (j*2));
+ out_be32((void *)GPIO_IS1(core_add+offs), reg);
+ break;
+
+ case GPIO_ALT2:
+ reg = in_be32((void *)GPIO_IS2(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ reg = reg | (GPIO_IN_SEL >> (j*2));
+ out_be32((void *)GPIO_IS2(core_add+offs), reg);
+ break;
+
+ case GPIO_ALT3:
+ reg = in_be32((void *)GPIO_IS3(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ reg = reg | (GPIO_IN_SEL >> (j*2));
+ out_be32((void *)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)) {
+
+ u32 gpio_alt_sel = 0;
+
+ switch (gpio_tab[gpio_core][i].alt_nb) {
+ case GPIO_SEL:
+ /*
+ * Setup output value
+ * 1 -> high level
+ * 0 -> low level
+ * else -> don't touch
+ */
+ reg = in_be32((void *)GPIO_OR(core_add));
+ if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_1)
+ reg |= (0x80000000 >> (i));
+ else if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_0)
+ reg &= ~(0x80000000 >> (i));
+ out_be32((void *)GPIO_OR(core_add), reg);
+
+ reg = in_be32((void *)GPIO_TCR(core_add)) |
+ (0x80000000 >> (i));
+ out_be32((void *)GPIO_TCR(core_add), reg);
+
+ reg = in_be32((void *)GPIO_OS(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ out_be32((void *)GPIO_OS(core_add+offs), reg);
+ reg = in_be32((void *)GPIO_TS(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ out_be32((void *)GPIO_TS(core_add+offs), reg);
+ break;
+
+ case GPIO_ALT1:
+ gpio_alt_sel = GPIO_ALT1_SEL;
+ break;
+
+ case GPIO_ALT2:
+ gpio_alt_sel = GPIO_ALT2_SEL;
+ break;
+
+ case GPIO_ALT3:
+ gpio_alt_sel = GPIO_ALT3_SEL;
+ break;
+ }
+
+ if (0 != gpio_alt_sel) {
+ reg = in_be32((void *)GPIO_OS(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ reg = reg | (gpio_alt_sel >> (j*2));
+ out_be32((void *)GPIO_OS(core_add+offs), reg);
+
+ if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_1) {
+ reg = in_be32((void *)GPIO_TCR(core_add))
+ | (0x80000000 >> (i));
+ out_be32((void *)GPIO_TCR(core_add), reg);
+ reg = in_be32((void *)GPIO_TS(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ out_be32((void *)GPIO_TS(core_add+offs), reg);
+ } else {
+ reg = in_be32((void *)GPIO_TCR(core_add))
+ & ~(0x80000000 >> (i));
+ out_be32((void *)GPIO_TCR(core_add), reg);
+ reg = in_be32((void *)GPIO_TS(core_add+offs))
+ & ~(GPIO_MASK >> (j*2));
+ reg = reg | (gpio_alt_sel >> (j*2));
+ out_be32((void *)GPIO_TS(core_add+offs), reg);
+ }
+ }
+ }
+ }
+ }
+}
+#endif /* CONFIG_SYS_4xx_GPIO_TABLE */
generated by cgit v1.1 at 2024-11-25 20:03:24 +0000