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authorAllen Martin <amartin@nvidia.com>2013-03-16 18:58:02 +0000
committerTom Warren <twarren@nvidia.com>2013-03-25 09:56:05 -0700
commit9000652da0893af8a07f81622b3ef8de6c8725bb (patch)
tree00835e8986dfd8b85470042bf74361cf51b6115a /board/nvidia
parentb6379e15a70cc2e22486e5962927d9de374d877b (diff)
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tegra: remove support for UART SPI switch
This feature was only used for tegra20 seaboard that had a pinmux conflict on the SPI pins. These boards were never manufactured, so remove this support to clean up SPI driver. Signed-off-by: Allen Martin <amartin@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'board/nvidia')
-rw-r--r--board/nvidia/common/board.c3
-rw-r--r--board/nvidia/common/common.mk1
-rw-r--r--board/nvidia/common/uart-spi-switch.c125
-rw-r--r--board/nvidia/seaboard/seaboard.c2
4 files changed, 1 insertions, 130 deletions
diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index 7d9f361..b6e6566 100644
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -132,9 +132,6 @@ int board_init(void)
clock_init();
clock_verify();
-#ifdef CONFIG_SPI_UART_SWITCH
- gpio_config_uart();
-#endif
#if defined(CONFIG_TEGRA_SPI) || defined(CONFIG_TEGRA_SLINK)
pin_mux_spi();
spi_init();
diff --git a/board/nvidia/common/common.mk b/board/nvidia/common/common.mk
index bd6202c..d9bcb85 100644
--- a/board/nvidia/common/common.mk
+++ b/board/nvidia/common/common.mk
@@ -1,4 +1,3 @@
# common options for all tegra boards
COBJS-y += ../../nvidia/common/board.o
-COBJS-$(CONFIG_SPI_UART_SWITCH) += ../../nvidia/common/uart-spi-switch.o
COBJS-$(CONFIG_TEGRA_CLOCK_SCALING) += ../../nvidia/common/emc.o
diff --git a/board/nvidia/common/uart-spi-switch.c b/board/nvidia/common/uart-spi-switch.c
deleted file mode 100644
index e9d445d..0000000
--- 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);
-}
diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c
index e581fdd..498e513 100644
--- a/board/nvidia/seaboard/seaboard.c
+++ b/board/nvidia/seaboard/seaboard.c
@@ -31,7 +31,7 @@
#include <asm/gpio.h>
/* TODO: Remove this code when the SPI switch is working */
-#if !defined(CONFIG_SPI_UART_SWITCH) && (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA)
+#if (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA)
void gpio_early_init_uart(void)
{
/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */