u-boot-brain/arch/avr32/cpu/portmux-pio.c

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avr32: refactor the portmux/gpio code - Separate the portmux configuration functionality from the GPIO pin control API. - Separate the controller-specific code from the chip-specific code. - Allow "ganged" port configuration (multiple pins at once). - Add more flexibility to the "canned" peripheral select functions: - Allow using more than 23 address bits, more chip selects, as well as NAND- and CF-specific pins. - Make the MACB SPEED pin optional, and choose between MII/RMII using a parameter instead of an #ifdef. - Make it possible to use other MMC slots than slot 0, and support different MMC/SDCard data bus widths. - Use more reasonable pull-up defaults; floating pins may consume a lot of power. - Get rid of some custom portmux code from the mimc200 board code. The old gpio/portmux API couldn't really handle its requirements, but the new one can. - Add documentation. The end result is slightly smaller code for all boards. Which isn't really the point, but at least it isn't any larger. This has been verified on ATSTK1002 and ATNGW100. I'd appreciate if the board maintainers could help me test this on their boards. In particular, the mimc200 port has lost a lot of code, so I'm hoping Mark can help me out. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Cc: Mark Jackson <mpfj@mimc.co.uk> Cc: Alex Raimondi <alex.raimondi@miromico.ch> Cc: Julien May <julien.may@miromico.ch> Changes since v1: * Enable pullup on NWAIT * Add missing include to portmux-pio.h * Rename CONFIG_PIO2 -> CONFIG_PORTMUX_PIO to match docs
2008-08-30 04:09:49 +09:00
/*
* Copyright (C) 2006, 2008 Atmel Corporation
*
* SPDX-License-Identifier: GPL-2.0+
avr32: refactor the portmux/gpio code - Separate the portmux configuration functionality from the GPIO pin control API. - Separate the controller-specific code from the chip-specific code. - Allow "ganged" port configuration (multiple pins at once). - Add more flexibility to the "canned" peripheral select functions: - Allow using more than 23 address bits, more chip selects, as well as NAND- and CF-specific pins. - Make the MACB SPEED pin optional, and choose between MII/RMII using a parameter instead of an #ifdef. - Make it possible to use other MMC slots than slot 0, and support different MMC/SDCard data bus widths. - Use more reasonable pull-up defaults; floating pins may consume a lot of power. - Get rid of some custom portmux code from the mimc200 board code. The old gpio/portmux API couldn't really handle its requirements, but the new one can. - Add documentation. The end result is slightly smaller code for all boards. Which isn't really the point, but at least it isn't any larger. This has been verified on ATSTK1002 and ATNGW100. I'd appreciate if the board maintainers could help me test this on their boards. In particular, the mimc200 port has lost a lot of code, so I'm hoping Mark can help me out. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Cc: Mark Jackson <mpfj@mimc.co.uk> Cc: Alex Raimondi <alex.raimondi@miromico.ch> Cc: Julien May <julien.may@miromico.ch> Changes since v1: * Enable pullup on NWAIT * Add missing include to portmux-pio.h * Rename CONFIG_PIO2 -> CONFIG_PORTMUX_PIO to match docs
2008-08-30 04:09:49 +09:00
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
avr32: refactor the portmux/gpio code - Separate the portmux configuration functionality from the GPIO pin control API. - Separate the controller-specific code from the chip-specific code. - Allow "ganged" port configuration (multiple pins at once). - Add more flexibility to the "canned" peripheral select functions: - Allow using more than 23 address bits, more chip selects, as well as NAND- and CF-specific pins. - Make the MACB SPEED pin optional, and choose between MII/RMII using a parameter instead of an #ifdef. - Make it possible to use other MMC slots than slot 0, and support different MMC/SDCard data bus widths. - Use more reasonable pull-up defaults; floating pins may consume a lot of power. - Get rid of some custom portmux code from the mimc200 board code. The old gpio/portmux API couldn't really handle its requirements, but the new one can. - Add documentation. The end result is slightly smaller code for all boards. Which isn't really the point, but at least it isn't any larger. This has been verified on ATSTK1002 and ATNGW100. I'd appreciate if the board maintainers could help me test this on their boards. In particular, the mimc200 port has lost a lot of code, so I'm hoping Mark can help me out. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Cc: Mark Jackson <mpfj@mimc.co.uk> Cc: Alex Raimondi <alex.raimondi@miromico.ch> Cc: Julien May <julien.may@miromico.ch> Changes since v1: * Enable pullup on NWAIT * Add missing include to portmux-pio.h * Rename CONFIG_PIO2 -> CONFIG_PORTMUX_PIO to match docs
2008-08-30 04:09:49 +09:00
#include <asm/arch/gpio.h>
void portmux_select_peripheral(void *port, unsigned long pin_mask,
enum portmux_function func, unsigned long flags)
{
if (flags & PORTMUX_PULL_UP)
pio_writel(port, PUER, pin_mask);
else
pio_writel(port, PUDR, pin_mask);
switch (func) {
case PORTMUX_FUNC_A:
pio_writel(port, ASR, pin_mask);
break;
case PORTMUX_FUNC_B:
pio_writel(port, BSR, pin_mask);
break;
}
pio_writel(port, PDR, pin_mask);
}
void portmux_select_gpio(void *port, unsigned long pin_mask,
unsigned long flags)
{
if (flags & PORTMUX_PULL_UP)
pio_writel(port, PUER, pin_mask);
else
pio_writel(port, PUDR, pin_mask);
if (flags & PORTMUX_OPEN_DRAIN)
pio_writel(port, MDER, pin_mask);
else
pio_writel(port, MDDR, pin_mask);
if (flags & PORTMUX_DIR_OUTPUT) {
if (flags & PORTMUX_INIT_HIGH)
pio_writel(port, SODR, pin_mask);
else
pio_writel(port, CODR, pin_mask);
pio_writel(port, OER, pin_mask);
} else {
pio_writel(port, ODR, pin_mask);
}
pio_writel(port, PER, pin_mask);
}
void pio_set_output_value(unsigned int pin, int value)
{
void *port = pio_pin_to_port(pin);
if (!port)
panic("Invalid GPIO pin %u\n", pin);
__pio_set_output_value(port, pin & 0x1f, value);
}
int pio_get_input_value(unsigned int pin)
{
void *port = pio_pin_to_port(pin);
if (!port)
panic("Invalid GPIO pin %u\n", pin);
return __pio_get_input_value(port, pin & 0x1f);
}