diff options
Diffstat (limited to 'board/nvidia/common/uart-spi-switch.c')
| -rw-r--r-- | board/nvidia/common/uart-spi-switch.c | 125 | 
1 files changed, 0 insertions, 125 deletions
| diff --git a/board/nvidia/common/uart-spi-switch.c b/board/nvidia/common/uart-spi-switch.c deleted file mode 100644 index e9d445d9e..000000000 --- a/board/nvidia/common/uart-spi-switch.c +++ /dev/null @@ -1,125 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * - * 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/gpio.h> -#include <asm/arch/pinmux.h> -#include <asm/arch/uart-spi-switch.h> -#include <asm/arch/tegra.h> -#include <asm/arch-tegra/tegra_spi.h> -#include <asm/arch-tegra/board.h> - -/* position of the UART/SPI select switch */ -enum spi_uart_switch { -	SWITCH_UNKNOWN, -	SWITCH_SPI, -	SWITCH_UART, -	SWITCH_BOTH -}; - -/* Information about the spi/uart switch */ -struct spi_uart { -	int gpio;                       /* GPIO to control switch */ -	u32 port;                       /* Port number of UART affected */ -}; - -static struct spi_uart local; -static enum spi_uart_switch switch_pos; /* Current switch position */ - - -static void get_config(struct spi_uart *config) -{ -#if defined CONFIG_SPI_CORRUPTS_UART -	config->gpio = CONFIG_UART_DISABLE_GPIO; -	config->port = CONFIG_SPI_CORRUPTS_UART_NR; -#else -	config->gpio = -1; -#endif -} - -/* - * Init the UART / SPI switch. This can be called before relocation so we must - * not access BSS. - */ -void gpio_early_init_uart(void) -{ -	struct spi_uart config; - -	get_config(&config); -	if (config.gpio != -1) { -		/* Cannot provide a label prior to relocation */ -		gpio_request(config.gpio, NULL); -		gpio_direction_output(config.gpio, 0); -	} -} - -/* - * Configure the UART / SPI switch. - */ -void gpio_config_uart(void) -{ -	get_config(&local); -	if (local.gpio != -1) { -		gpio_direction_output(local.gpio, 0); -		switch_pos = SWITCH_UART; -	} else { -		/* -		 * If we're here we don't have a SPI switch; go ahead and -		 * enable the SPI now.  We didn't in spi_init() so we wouldn't -		 * kill the UART. -		 */ -		pinmux_set_func(PINGRP_GMC, PMUX_FUNC_SFLASH); -		switch_pos = SWITCH_BOTH; -	} -} - -static void spi_uart_switch(struct spi_uart *config, -			      enum spi_uart_switch new_pos) -{ -	if (switch_pos == SWITCH_BOTH || new_pos == switch_pos) -		return; - -	/* pre-delay, allow SPI/UART to settle, FIFO to empty, etc. */ -	udelay(CONFIG_SPI_CORRUPTS_UART_DLY); - -	/* We need to dynamically change the pinmux, shared w/UART RXD/CTS */ -	pinmux_set_func(PINGRP_GMC, new_pos == SWITCH_SPI ? -				PMUX_FUNC_SFLASH : PMUX_FUNC_UARTD); - -	/* -	 * On Seaboard, MOSI/MISO are shared w/UART. -	 * Use GPIO I3 (UART_DISABLE) to tristate UART during SPI activity. -	 * Enable UART later (cs_deactivate) so we can use it for U-Boot comms. -	 */ -	gpio_direction_output(config->gpio, new_pos == SWITCH_SPI); -	switch_pos = new_pos; -} - -void pinmux_select_uart(void) -{ -		spi_uart_switch(&local, SWITCH_UART); -} - -void pinmux_select_spi(void) -{ -	spi_uart_switch(&local, SWITCH_SPI); -} |