diff options
Diffstat (limited to 'board/nvidia')
| -rw-r--r-- | board/nvidia/common/uart-spi-switch.c | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/board/nvidia/common/uart-spi-switch.c b/board/nvidia/common/uart-spi-switch.c index 23aa0b9..1ba1afd 100644 --- a/board/nvidia/common/uart-spi-switch.c +++ b/board/nvidia/common/uart-spi-switch.c @@ -21,7 +21,6 @@ */ #include <common.h> -#include <ns16550.h> #include <asm/gpio.h> #include <asm/arch/pinmux.h> #include <asm/arch/uart-spi-switch.h> @@ -40,7 +39,6 @@ enum spi_uart_switch { /* Information about the spi/uart switch */ struct spi_uart { int gpio; /* GPIO to control switch */ - NS16550_t regs; /* Address of UART affected */ u32 port; /* Port number of UART affected */ }; @@ -52,7 +50,6 @@ static void get_config(struct spi_uart *config) { #if defined CONFIG_SPI_CORRUPTS_UART config->gpio = CONFIG_UART_DISABLE_GPIO; - config->regs = (NS16550_t)CONFIG_SPI_CORRUPTS_UART; config->port = CONFIG_SPI_CORRUPTS_UART_NR; #else config->gpio = -1; @@ -101,34 +98,24 @@ static void spi_uart_switch(struct spi_uart *config, if (switch_pos == SWITCH_BOTH || new_pos == switch_pos) return; - /* if the UART was selected, allow it to drain */ - if (switch_pos == SWITCH_UART) - NS16550_drain(config->regs, config->port); + /* 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. - */ + * 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; - - /* if the SPI was selected, clear any junk bytes in the UART */ - if (switch_pos == SWITCH_UART) { - /* TODO: What if it is part-way through clocking in junk? */ - udelay(100); - NS16550_clear(config->regs, config->port); - } } -void pinmux_select_uart(NS16550_t regs) +void pinmux_select_uart(void) { - /* Also prevents calling spi_uart_switch() before relocation */ - if (regs == local.regs) spi_uart_switch(&local, SWITCH_UART); } |