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https://github.com/AsahiLinux/u-boot
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255 lines
6.5 KiB
C
255 lines
6.5 KiB
C
/*
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* (C) Copyright 2007-2008
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#if defined(CONFIG_SYS_4xx_GPIO_TABLE)
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gpio_param_s const gpio_tab[GPIO_GROUP_MAX][GPIO_MAX] = CONFIG_SYS_4xx_GPIO_TABLE;
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#endif
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#if defined(GPIO0_OSRL)
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/* Only some 4xx variants support alternate funtions on the GPIO's */
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void gpio_config(int pin, int in_out, int gpio_alt, int out_val)
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{
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u32 mask;
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u32 mask2;
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u32 val;
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u32 offs = 0;
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u32 offs2 = 0;
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int pin2 = pin << 1;
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if (pin >= GPIO_MAX) {
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offs = 0x100;
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pin -= GPIO_MAX;
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}
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if (pin >= GPIO_MAX/2) {
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offs2 = 0x4;
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pin2 = (pin - GPIO_MAX/2) << 1;
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}
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mask = 0x80000000 >> pin;
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mask2 = 0xc0000000 >> pin2;
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/* first set TCR to 0 */
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out_be32((void *)GPIO0_TCR + offs, in_be32((void *)GPIO0_TCR + offs) & ~mask);
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if (in_out == GPIO_OUT) {
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val = in_be32((void *)GPIO0_OSRL + offs + offs2) & ~mask2;
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switch (gpio_alt) {
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case GPIO_ALT1:
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val |= GPIO_ALT1_SEL >> pin2;
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break;
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case GPIO_ALT2:
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val |= GPIO_ALT2_SEL >> pin2;
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break;
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case GPIO_ALT3:
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val |= GPIO_ALT3_SEL >> pin2;
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break;
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}
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out_be32((void *)GPIO0_OSRL + offs + offs2, val);
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/* setup requested output value */
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if (out_val == GPIO_OUT_0)
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out_be32((void *)GPIO0_OR + offs,
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in_be32((void *)GPIO0_OR + offs) & ~mask);
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else if (out_val == GPIO_OUT_1)
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out_be32((void *)GPIO0_OR + offs,
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in_be32((void *)GPIO0_OR + offs) | mask);
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/* now configure TCR to drive output if selected */
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out_be32((void *)GPIO0_TCR + offs,
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in_be32((void *)GPIO0_TCR + offs) | mask);
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} else {
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val = in_be32((void *)GPIO0_ISR1L + offs + offs2) & ~mask2;
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val |= GPIO_IN_SEL >> pin2;
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out_be32((void *)GPIO0_ISR1L + offs + offs2, val);
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}
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}
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#endif /* GPIO_OSRL */
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void gpio_write_bit(int pin, int val)
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{
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u32 offs = 0;
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if (pin >= GPIO_MAX) {
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offs = 0x100;
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pin -= GPIO_MAX;
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}
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if (val)
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out_be32((void *)GPIO0_OR + offs,
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in_be32((void *)GPIO0_OR + offs) | GPIO_VAL(pin));
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else
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out_be32((void *)GPIO0_OR + offs,
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in_be32((void *)GPIO0_OR + offs) & ~GPIO_VAL(pin));
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}
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int gpio_read_out_bit(int pin)
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{
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u32 offs = 0;
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if (pin >= GPIO_MAX) {
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offs = 0x100;
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pin -= GPIO_MAX;
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}
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return (in_be32((void *)GPIO0_OR + offs) & GPIO_VAL(pin) ? 1 : 0);
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}
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int gpio_read_in_bit(int pin)
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{
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u32 offs = 0;
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if (pin >= GPIO_MAX) {
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offs = 0x100;
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pin -= GPIO_MAX;
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}
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return (in_be32((void *)GPIO0_IR + offs) & GPIO_VAL(pin) ? 1 : 0);
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}
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#if defined(CONFIG_SYS_4xx_GPIO_TABLE)
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void gpio_set_chip_configuration(void)
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{
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unsigned char i=0, j=0, offs=0, gpio_core;
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unsigned long reg, core_add;
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for (gpio_core=0; gpio_core<GPIO_GROUP_MAX; gpio_core++) {
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j = 0;
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offs = 0;
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/* GPIO config of the GPIOs 0 to 31 */
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for (i=0; i<GPIO_MAX; i++, j++) {
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if (i == GPIO_MAX/2) {
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offs = 4;
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j = i-16;
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}
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core_add = gpio_tab[gpio_core][i].add;
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if ((gpio_tab[gpio_core][i].in_out == GPIO_IN) ||
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(gpio_tab[gpio_core][i].in_out == GPIO_BI)) {
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switch (gpio_tab[gpio_core][i].alt_nb) {
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case GPIO_SEL:
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break;
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case GPIO_ALT1:
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reg = in_be32((void *)GPIO_IS1(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (GPIO_IN_SEL >> (j*2));
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out_be32((void *)GPIO_IS1(core_add+offs), reg);
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break;
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case GPIO_ALT2:
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reg = in_be32((void *)GPIO_IS2(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (GPIO_IN_SEL >> (j*2));
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out_be32((void *)GPIO_IS2(core_add+offs), reg);
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break;
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case GPIO_ALT3:
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reg = in_be32((void *)GPIO_IS3(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (GPIO_IN_SEL >> (j*2));
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out_be32((void *)GPIO_IS3(core_add+offs), reg);
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break;
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}
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}
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if ((gpio_tab[gpio_core][i].in_out == GPIO_OUT) ||
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(gpio_tab[gpio_core][i].in_out == GPIO_BI)) {
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u32 gpio_alt_sel = 0;
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switch (gpio_tab[gpio_core][i].alt_nb) {
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case GPIO_SEL:
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/*
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* Setup output value
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* 1 -> high level
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* 0 -> low level
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* else -> don't touch
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*/
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reg = in_be32((void *)GPIO_OR(core_add));
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if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_1)
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reg |= (0x80000000 >> (i));
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else if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_0)
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reg &= ~(0x80000000 >> (i));
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out_be32((void *)GPIO_OR(core_add), reg);
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reg = in_be32((void *)GPIO_TCR(core_add)) |
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(0x80000000 >> (i));
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out_be32((void *)GPIO_TCR(core_add), reg);
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reg = in_be32((void *)GPIO_OS(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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out_be32((void *)GPIO_OS(core_add+offs), reg);
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reg = in_be32((void *)GPIO_TS(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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out_be32((void *)GPIO_TS(core_add+offs), reg);
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break;
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case GPIO_ALT1:
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gpio_alt_sel = GPIO_ALT1_SEL;
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break;
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case GPIO_ALT2:
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gpio_alt_sel = GPIO_ALT2_SEL;
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break;
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case GPIO_ALT3:
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gpio_alt_sel = GPIO_ALT3_SEL;
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break;
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}
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if (0 != gpio_alt_sel) {
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reg = in_be32((void *)GPIO_OS(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (gpio_alt_sel >> (j*2));
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out_be32((void *)GPIO_OS(core_add+offs), reg);
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if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_1) {
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reg = in_be32((void *)GPIO_TCR(core_add))
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| (0x80000000 >> (i));
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out_be32((void *)GPIO_TCR(core_add), reg);
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reg = in_be32((void *)GPIO_TS(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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out_be32((void *)GPIO_TS(core_add+offs), reg);
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} else {
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reg = in_be32((void *)GPIO_TCR(core_add))
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& ~(0x80000000 >> (i));
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out_be32((void *)GPIO_TCR(core_add), reg);
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reg = in_be32((void *)GPIO_TS(core_add+offs))
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (gpio_alt_sel >> (j*2));
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out_be32((void *)GPIO_TS(core_add+offs), reg);
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}
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}
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}
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}
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}
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}
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#endif /* CONFIG_SYS_4xx_GPIO_TABLE */
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