2007-03-24 14:45:34 +00:00
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/*
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2008-06-23 09:15:09 +00:00
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* (C) Copyright 2007-2008
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2007-03-24 14:45:34 +00:00
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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*
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2013-07-08 07:37:19 +00:00
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* SPDX-License-Identifier: GPL-2.0+
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2007-03-24 14:45:34 +00:00
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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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2010-09-16 12:30:37 +00:00
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#include <asm/ppc4xx-gpio.h>
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2007-03-24 14:45:34 +00:00
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2010-09-12 04:21:37 +00:00
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/* Only compile this file for boards with GPIO support */
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#if defined(GPIO0_BASE)
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2008-10-16 13:01:15 +00:00
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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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2007-03-24 14:45:34 +00:00
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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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2007-12-11 12:38:19 +00:00
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offs2 = 0x4;
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2007-03-24 14:45:34 +00:00
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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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2008-06-23 09:15:09 +00:00
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mask2 = 0xc0000000 >> pin2;
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2007-03-24 14:45:34 +00:00
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/* first set TCR to 0 */
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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO0_TCR + offs, in_be32((void *)GPIO0_TCR + offs) & ~mask);
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2007-03-24 14:45:34 +00:00
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if (in_out == GPIO_OUT) {
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2007-11-15 13:23:55 +00:00
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val = in_be32((void *)GPIO0_OSRL + offs + offs2) & ~mask2;
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2007-03-24 14:45:34 +00:00
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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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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO0_OSRL + offs + offs2, val);
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2007-03-24 14:45:34 +00:00
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/* setup requested output value */
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if (out_val == GPIO_OUT_0)
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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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else if (out_val == GPIO_OUT_1)
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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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/* now configure TCR to drive output if selected */
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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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} else {
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2007-11-15 13:23:55 +00:00
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val = in_be32((void *)GPIO0_ISR1L + offs + offs2) & ~mask2;
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2007-03-24 14:45:34 +00:00
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val |= GPIO_IN_SEL >> pin2;
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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO0_ISR1L + offs + offs2, val);
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2007-03-24 14:45:34 +00:00
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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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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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else
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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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}
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2007-06-15 05:39:43 +00:00
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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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2007-11-15 13:23:55 +00:00
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return (in_be32((void *)GPIO0_OR + offs) & GPIO_VAL(pin) ? 1 : 0);
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2007-06-15 05:39:43 +00:00
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}
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ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
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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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2008-10-16 13:01:15 +00:00
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#if defined(CONFIG_SYS_4xx_GPIO_TABLE)
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2007-03-24 14:45:34 +00:00
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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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2007-11-15 13:23:55 +00:00
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reg = in_be32((void *)GPIO_IS1(core_add+offs))
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2007-03-24 14:45:34 +00:00
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (GPIO_IN_SEL >> (j*2));
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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO_IS1(core_add+offs), reg);
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2007-03-24 14:45:34 +00:00
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break;
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case GPIO_ALT2:
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2007-11-15 13:23:55 +00:00
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reg = in_be32((void *)GPIO_IS2(core_add+offs))
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2007-03-24 14:45:34 +00:00
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (GPIO_IN_SEL >> (j*2));
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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO_IS2(core_add+offs), reg);
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2007-03-24 14:45:34 +00:00
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break;
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case GPIO_ALT3:
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2007-11-15 13:23:55 +00:00
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reg = in_be32((void *)GPIO_IS3(core_add+offs))
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2007-03-24 14:45:34 +00:00
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& ~(GPIO_MASK >> (j*2));
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reg = reg | (GPIO_IN_SEL >> (j*2));
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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO_IS3(core_add+offs), reg);
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2007-03-24 14:45:34 +00:00
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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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ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
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u32 gpio_alt_sel = 0;
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2007-03-24 14:45:34 +00:00
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switch (gpio_tab[gpio_core][i].alt_nb) {
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case GPIO_SEL:
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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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& ~(GPIO_MASK >> (j*2));
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2007-11-15 13:23:55 +00:00
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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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2007-03-24 14:45:34 +00:00
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& ~(GPIO_MASK >> (j*2));
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2007-11-15 13:23:55 +00:00
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out_be32((void *)GPIO_TS(core_add+offs), reg);
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2007-03-24 14:45:34 +00:00
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break;
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case GPIO_ALT1:
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ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
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gpio_alt_sel = GPIO_ALT1_SEL;
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2007-03-24 14:45:34 +00:00
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break;
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case GPIO_ALT2:
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ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
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gpio_alt_sel = GPIO_ALT2_SEL;
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2007-03-24 14:45:34 +00:00
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break;
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case GPIO_ALT3:
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ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
|
|
|
gpio_alt_sel = GPIO_ALT3_SEL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (0 != gpio_alt_sel) {
|
2007-11-15 13:23:55 +00:00
|
|
|
reg = in_be32((void *)GPIO_OS(core_add+offs))
|
2007-03-24 14:45:34 +00:00
|
|
|
& ~(GPIO_MASK >> (j*2));
|
ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
|
|
|
reg = reg | (gpio_alt_sel >> (j*2));
|
2007-11-15 13:23:55 +00:00
|
|
|
out_be32((void *)GPIO_OS(core_add+offs), reg);
|
ppc4xx: Add functionality to GPIO support
This patch makes two additions to GPIO support:
First, it adds function gpio_read_in_bit() to read the a bit from the
GPIO Input Register (GPIOx_IR) in the same way that function
gpio_read_out_bit() reads a bit from the GPIO Output Register
(GPIOx_OR).
Second, it modifies function gpio_set_chip_configuration() to provide
an additional option for configuring the GPIO from the
"CFG_4xx_GPIO_TABLE".
According to the 440EPx User's Manual, when an alternate output is used,
the three-state control is configured in one of two ways, depending on
the particular output. The first option is to select the corresponding
alternate three-state control in the GPIOx_TRSH/L registers. The second
option is to select the GPIO Three-State Control Register (GPIOx_TCR) in
the GPIOx_TRSH/L registers, and set the corresponding bit in the
GPIOx_TCR register to enable the output. For example, the Manual
specifies configuring the GPIO00 Alternate 1 Signal (PreAddr07) to use
the alternate three-state control (first option), and specifies
configuring the GPIO32 Alternate 1 Signal (USB2OM0) with the output
enabled in the GPIOx_TCR register (second option).
Currently, gpio_set_chip_configuration() configures all alternate signal
outputs to use the first option. This patch allow the second option to
be selected by setting the "out_val" element in the table entry to
"GPIO_OUT_1". The first option is used when the "out_val" element is
set to "GPIO_OUT_0". Because "out_val" is not currently used when an
alternate signal is selected, and because all current GPIO tables set
"out_val" to "GPIO_OUT_0" for all alternate signals, this patch should
not change any existing configurations.
Signed-off-by: Larry Johnson <lrj@acm.org>
2008-01-03 23:54:00 +00:00
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
2007-03-24 14:45:34 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2010-09-12 04:21:37 +00:00
|
|
|
|
|
|
|
#endif /* GPIO0_BASE */
|
2008-10-16 13:01:15 +00:00
|
|
|
#endif /* CONFIG_SYS_4xx_GPIO_TABLE */
|