diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Makefile | 1 | ||||
| -rw-r--r-- | drivers/serial/ns16550.c | 18 | ||||
| -rw-r--r-- | drivers/serial/s3c64xx.c | 187 | ||||
| -rw-r--r-- | drivers/serial/serial.c | 2 |
4 files changed, 16 insertions, 192 deletions
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index de3f471996..fbc4e97e98 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -35,7 +35,6 @@ COBJS-$(CONFIG_LPC32XX_HSUART) += lpc32xx_hsuart.o COBJS-$(CONFIG_MCFUART) += mcfuart.o COBJS-$(CONFIG_OPENCORES_YANU) += opencores_yanu.o COBJS-$(CONFIG_SYS_NS16550) += ns16550.o -COBJS-$(CONFIG_S3C64XX) += s3c64xx.o COBJS-$(CONFIG_S5P) += serial_s5p.o COBJS-$(CONFIG_SYS_NS16550_SERIAL) += serial_ns16550.o COBJS-$(CONFIG_IMX_SERIAL) += serial_imx.o diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index ed4e6b3a1f..7f013ab33c 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -36,10 +36,24 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) { -#if (!defined(CONFIG_SYS_NS16550_BROKEN_TEMT)) +#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX)) + /* + * On some OMAP3 devices when UART3 is configured for boot mode before + * SPL starts only THRE bit is set. We have to empty the transmitter + * before initialization starts. + */ + if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE)) + == UART_LSR_THRE) { + serial_out(UART_LCR_DLAB, &com_port->lcr); + serial_out(baud_divisor & 0xff, &com_port->dll); + serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm); + serial_out(UART_LCRVAL, &com_port->lcr); + serial_out(0, &com_port->mdr1); + } +#endif + while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT)) ; -#endif serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier); #if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \ diff --git a/drivers/serial/s3c64xx.c b/drivers/serial/s3c64xx.c deleted file mode 100644 index b590992dc8..0000000000 --- a/drivers/serial/s3c64xx.c +++ /dev/null @@ -1,187 +0,0 @@ -/* - * (C) Copyright 2002 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * (C) Copyright 2008 - * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.de> - * - * 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 <linux/compiler.h> -#include <serial.h> -#include <asm/arch/s3c6400.h> - -DECLARE_GLOBAL_DATA_PTR; - -#ifdef CONFIG_SERIAL1 -#define UART_NR S3C64XX_UART0 - -#elif defined(CONFIG_SERIAL2) -#define UART_NR S3C64XX_UART1 - -#elif defined(CONFIG_SERIAL3) -#define UART_NR S3C64XX_UART2 - -#else -#error "Bad: you didn't configure serial ..." -#endif - -/* - * The coefficient, used to calculate the baudrate on S3C6400 UARTs is - * calculated as - * C = UBRDIV * 16 + number_of_set_bits_in_UDIVSLOT - * however, section 31.6.11 of the datasheet doesn't recomment using 1 for 1, - * 3 for 2, ... (2^n - 1) for n, instead, they suggest using these constants: - */ -static const int udivslot[] = { - 0, - 0x0080, - 0x0808, - 0x0888, - 0x2222, - 0x4924, - 0x4a52, - 0x54aa, - 0x5555, - 0xd555, - 0xd5d5, - 0xddd5, - 0xdddd, - 0xdfdd, - 0xdfdf, - 0xffdf, -}; - -static void s3c64xx_serial_setbrg(void) -{ - s3c64xx_uart *const uart = s3c64xx_get_base_uart(UART_NR); - u32 pclk = get_PCLK(); - u32 baudrate = gd->baudrate; - int i; - - i = (pclk / baudrate) % 16; - - uart->UBRDIV = pclk / baudrate / 16 - 1; - uart->UDIVSLOT = udivslot[i]; - - for (i = 0; i < 100; i++) - barrier(); -} - -/* - * Initialise the serial port with the given baudrate. The settings - * are always 8 data bits, no parity, 1 stop bit, no start bits. - */ -static int s3c64xx_serial_init(void) -{ - s3c64xx_uart *const uart = s3c64xx_get_base_uart(UART_NR); - - /* reset and enable FIFOs, set triggers to the maximum */ - uart->UFCON = 0xff; - uart->UMCON = 0; - /* 8N1 */ - uart->ULCON = 3; - /* No interrupts, no DMA, pure polling */ - uart->UCON = 5; - - serial_setbrg(); - - return 0; -} - -/* - * Read a single byte from the serial port. Returns 1 on success, 0 - * otherwise. When the function is succesfull, the character read is - * written into its argument c. - */ -static int s3c64xx_serial_getc(void) -{ - s3c64xx_uart *const uart = s3c64xx_get_base_uart(UART_NR); - - /* wait for character to arrive */ - while (!(uart->UTRSTAT & 0x1)); - - return uart->URXH & 0xff; -} - -#ifdef CONFIG_MODEM_SUPPORT -static int be_quiet; -void disable_putc(void) -{ - be_quiet = 1; -} - -void enable_putc(void) -{ - be_quiet = 0; -} -#endif - - -/* - * Output a single byte to the serial port. - */ -static void s3c64xx_serial_putc(const char c) -{ - s3c64xx_uart *const uart = s3c64xx_get_base_uart(UART_NR); - -#ifdef CONFIG_MODEM_SUPPORT - if (be_quiet) - return; -#endif - - /* wait for room in the tx FIFO */ - while (!(uart->UTRSTAT & 0x2)); - - uart->UTXH = c; - - /* If \n, also do \r */ - if (c == '\n') - serial_putc('\r'); -} - -/* - * Test whether a character is in the RX buffer - */ -static int s3c64xx_serial_tstc(void) -{ - s3c64xx_uart *const uart = s3c64xx_get_base_uart(UART_NR); - - return uart->UTRSTAT & 0x1; -} - -static struct serial_device s3c64xx_serial_drv = { - .name = "s3c64xx_serial", - .start = s3c64xx_serial_init, - .stop = NULL, - .setbrg = s3c64xx_serial_setbrg, - .putc = s3c64xx_serial_putc, - .puts = default_serial_puts, - .getc = s3c64xx_serial_getc, - .tstc = s3c64xx_serial_tstc, -}; - -void s3c64xx_serial_initialize(void) -{ - serial_register(&s3c64xx_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &s3c64xx_serial_drv; -} diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c index 7922bf0669..9f04643551 100644 --- a/drivers/serial/serial.c +++ b/drivers/serial/serial.c @@ -165,7 +165,6 @@ serial_initfunc(atmel_serial_initialize); serial_initfunc(lpc32xx_serial_initialize); serial_initfunc(mcf_serial_initialize); serial_initfunc(oc_serial_initialize); -serial_initfunc(s3c64xx_serial_initialize); serial_initfunc(sandbox_serial_initialize); serial_initfunc(clps7111_serial_initialize); serial_initfunc(imx_serial_initialize); @@ -259,7 +258,6 @@ void serial_initialize(void) lpc32xx_serial_initialize(); mcf_serial_initialize(); oc_serial_initialize(); - s3c64xx_serial_initialize(); sandbox_serial_initialize(); clps7111_serial_initialize(); imx_serial_initialize(); |
