Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5236
-gerrit
commit 888cc0b821d7f5d21d311b07bf0591baa1c3a157 Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Thu Jan 30 15:45:16 2014 +0200
uart8250: Move under drivers/uart
Change-Id: Ic65ffaaa092330ed68d891e4a09a8b86cdc04a3a Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- src/arch/x86/lib/romcc_console.c | 2 +- src/drivers/uart/Makefile.inc | 12 ++++ src/drivers/uart/uart8250io.c | 125 ++++++++++++++++++++++++++++++++++++ src/drivers/uart/uart8250mem.c | 135 +++++++++++++++++++++++++++++++++++++++ src/lib/Makefile.inc | 4 -- src/lib/uart8250.c | 125 ------------------------------------ src/lib/uart8250mem.c | 135 --------------------------------------- 7 files changed, 273 insertions(+), 265 deletions(-)
diff --git a/src/arch/x86/lib/romcc_console.c b/src/arch/x86/lib/romcc_console.c index 5a88146..5b88a98 100644 --- a/src/arch/x86/lib/romcc_console.c +++ b/src/arch/x86/lib/romcc_console.c @@ -33,7 +33,7 @@ #include <console/util.c>
#if CONFIG_CONSOLE_SERIAL8250 -#include "lib/uart8250.c" +#include "drivers/uart/uart8250io.c" #endif #if CONFIG_CONSOLE_NE2K #include "drivers/net/ne2k.c" diff --git a/src/drivers/uart/Makefile.inc b/src/drivers/uart/Makefile.inc index 9a8121e..aec6a58 100644 --- a/src/drivers/uart/Makefile.inc +++ b/src/drivers/uart/Makefile.inc @@ -1,3 +1,15 @@ +ifeq ($(CONFIG_CONSOLE_SERIAL8250),y) +romstage-y += uart8250io.c +ramstage-y += uart8250io.c +smm-$(CONFIG_DEBUG_SMI) += uart8250io.c +endif + +ifeq ($(CONFIG_CONSOLE_SERIAL8250MEM),y) +romstage-y += uart8250mem.c +ramstage-y += uart8250mem.c +smm-$(CONFIG_DEBUG_SMI) += uart8250mem.c +endif + ifeq ($(CONFIG_CONSOLE_SERIAL_UART),y)
ifeq ($(CONFIG_DRIVERS_UART_PL011),y) diff --git a/src/drivers/uart/uart8250io.c b/src/drivers/uart/uart8250io.c new file mode 100644 index 0000000..ecd77b7 --- /dev/null +++ b/src/drivers/uart/uart8250io.c @@ -0,0 +1,125 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2003 Eric Biederman + * Copyright (C) 2006-2010 coresystems GmbH + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <console/uart.h> +#include <trace.h> +#include "uart8250reg.h" + +/* Should support 8250, 16450, 16550, 16550A type UARTs */ + +/* Expected character delay at 1200bps is 9ms for a working UART + * and no flow-control. Assume UART as stuck if shift register + * or FIFO takes more than 50ms per character to appear empty. + * + * Estimated that inb() from UART takes 1 microsecond. + */ +#define SINGLE_CHAR_TIMEOUT (50 * 1000) +#define FIFO_TIMEOUT (16 * SINGLE_CHAR_TIMEOUT) + +static inline int uart8250_can_tx_byte(unsigned base_port) +{ + return inb(base_port + UART_LSR) & UART_LSR_THRE; +} + +static inline void uart8250_wait_to_tx_byte(unsigned base_port) +{ + unsigned long int i = SINGLE_CHAR_TIMEOUT; + while (i-- && !uart8250_can_tx_byte(base_port)); +} + +static inline void uart8250_wait_until_sent(unsigned base_port) +{ + unsigned long int i = FIFO_TIMEOUT; + while (i-- && !(inb(base_port + UART_LSR) & UART_LSR_TEMT)); +} + +static void uart8250_tx_byte(unsigned base_port, unsigned char data) +{ + uart8250_wait_to_tx_byte(base_port); + outb(data, base_port + UART_TBR); +} + +static void uart8250_tx_flush(unsigned base_port) +{ + uart8250_wait_until_sent(base_port); +} + +static int uart8250_can_rx_byte(unsigned base_port) +{ + return inb(base_port + UART_LSR) & UART_LSR_DR; +} + +static unsigned char uart8250_rx_byte(unsigned base_port) +{ + unsigned long int i = SINGLE_CHAR_TIMEOUT; + while (i-- && !uart8250_can_rx_byte(base_port)); + + if (i) + return inb(base_port + UART_RBR); + else + return 0x0; +} + +static void uart8250_init(unsigned base_port, unsigned divisor) +{ + DISABLE_TRACE; + /* Disable interrupts */ + outb(0x0, base_port + UART_IER); + /* Enable FIFOs */ + outb(UART_FCR_FIFO_EN, base_port + UART_FCR); + + /* assert DTR and RTS so the other end is happy */ + outb(UART_MCR_DTR | UART_MCR_RTS, base_port + UART_MCR); + + /* DLAB on */ + outb(UART_LCR_DLAB | CONFIG_TTYS0_LCS, base_port + UART_LCR); + + /* Set Baud Rate Divisor. 12 ==> 9600 Baud */ + outb(divisor & 0xFF, base_port + UART_DLL); + outb((divisor >> 8) & 0xFF, base_port + UART_DLM); + + /* Set to 3 for 8N1 */ + outb(CONFIG_TTYS0_LCS, base_port + UART_LCR); + ENABLE_TRACE; +} + +static const unsigned base = CONFIG_TTYS0_BASE; + +void uart_init(void) +{ + unsigned int div = uart_divisor(115200); + uart8250_init(base, div); +} + +void uart_tx_byte(unsigned char data) +{ + uart8250_tx_byte(base, data); +} + +unsigned char uart_rx_byte(void) +{ + return uart8250_rx_byte(base); +} + +void uart_tx_flush(void) +{ + uart8250_tx_flush(base); +} diff --git a/src/drivers/uart/uart8250mem.c b/src/drivers/uart/uart8250mem.c new file mode 100644 index 0000000..210b9a8 --- /dev/null +++ b/src/drivers/uart/uart8250mem.c @@ -0,0 +1,135 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2003 Eric Biederman + * Copyright (C) 2006-2010 coresystems GmbH + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <console/uart.h> +#include <delay.h> +#include "uart8250reg.h" + +/* Should support 8250, 16450, 16550, 16550A type UARTs */ + +/* Expected character delay at 1200bps is 9ms for a working UART + * and no flow-control. Assume UART as stuck if shift register + * or FIFO takes more than 50ms per character to appear empty. + */ +#define SINGLE_CHAR_TIMEOUT (50 * 1000) +#define FIFO_TIMEOUT (16 * SINGLE_CHAR_TIMEOUT) + +static inline int uart8250_mem_can_tx_byte(unsigned base_port) +{ + return read8(base_port + UART_LSR) & UART_LSR_THRE; +} + +static inline void uart8250_mem_wait_to_tx_byte(unsigned base_port) +{ + unsigned long int i = SINGLE_CHAR_TIMEOUT; + while(i-- && !uart8250_mem_can_tx_byte(base_port)) + udelay(1); +} + +static inline void uart8250_mem_wait_until_sent(unsigned base_port) +{ + unsigned long int i = FIFO_TIMEOUT; + while(i-- && !(read8(base_port + UART_LSR) & UART_LSR_TEMT)) + udelay(1); +} + +static void uart8250_mem_tx_byte(unsigned base_port, unsigned char data) +{ + uart8250_mem_wait_to_tx_byte(base_port); + write8(base_port + UART_TBR, data); +} + +static void uart8250_mem_tx_flush(unsigned base_port) +{ + uart8250_mem_wait_until_sent(base_port); +} + +static int uart8250_mem_can_rx_byte(unsigned base_port) +{ + return read8(base_port + UART_LSR) & UART_LSR_DR; +} + +static unsigned char uart8250_mem_rx_byte(unsigned base_port) +{ + unsigned long int i = SINGLE_CHAR_TIMEOUT; + while(i-- && !uart8250_mem_can_rx_byte(base_port)) + udelay(1); + if (i) + return read8(base_port + UART_RBR); + else + return 0x0; +} + +static void uart8250_mem_init(unsigned base_port, unsigned divisor) +{ + /* Disable interrupts */ + write8(base_port + UART_IER, 0x0); + /* Enable FIFOs */ + write8(base_port + UART_FCR, UART_FCR_FIFO_EN); + + /* Assert DTR and RTS so the other end is happy */ + write8(base_port + UART_MCR, UART_MCR_DTR | UART_MCR_RTS); + + /* DLAB on */ + write8(base_port + UART_LCR, UART_LCR_DLAB | CONFIG_TTYS0_LCS); + + /* Set Baud Rate Divisor. 12 ==> 9600 Baud */ + write8(base_port + UART_DLL, divisor & 0xFF); + write8(base_port + UART_DLM, (divisor >> 8) & 0xFF); + + /* Set to 3 for 8N1 */ + write8(base_port + UART_LCR, CONFIG_TTYS0_LCS); +} + + +void uart_init(void) +{ + u32 base = uart_platform_base(0); + if (!base) + return; + + unsigned div = uart_platform_divisor(); + uart8250_mem_init(base, div); +} + +void uart_tx_byte(unsigned char data) +{ + u32 base = uart_platform_base(0); + if (!base) + return; + uart8250_mem_tx_byte(base, data); +} + +unsigned char uart_rx_byte(void) +{ + u32 base = uart_platform_base(0); + if (!base) + return 0xff; + return uart8250_mem_rx_byte(base); +} + +void uart_tx_flush(void) +{ + u32 base = uart_platform_base(0); + if (!base) + return; + uart8250_mem_tx_flush(base); +} diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc index 076bdd7..941c0ba 100644 --- a/src/lib/Makefile.inc +++ b/src/lib/Makefile.inc @@ -45,8 +45,6 @@ romstage-y += cbfs.c romstage-$(CONFIG_COMPRESS_RAMSTAGE) += lzma.c #romstage-y += lzmadecode.c romstage-$(CONFIG_CACHE_AS_RAM) += ramtest.c -romstage-$(CONFIG_CONSOLE_SERIAL8250) += uart8250.c -romstage-$(CONFIG_CONSOLE_SERIAL8250MEM) += uart8250mem.c
ifeq ($(CONFIG_EARLY_CBMEM_INIT),y) romstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c @@ -86,8 +84,6 @@ ramstage-y += stack.c ramstage-$(CONFIG_ARCH_X86) += gcc.c ramstage-y += clog2.c romstage-y += clog2.c -ramstage-$(CONFIG_CONSOLE_SERIAL8250) += uart8250.c -ramstage-$(CONFIG_CONSOLE_SERIAL8250MEM) += uart8250mem.c ramstage-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c ramstage-$(CONFIG_BOOTSPLASH) += jpeg.c ramstage-$(CONFIG_TRACE) += trace.c diff --git a/src/lib/uart8250.c b/src/lib/uart8250.c deleted file mode 100644 index 75caa06..0000000 --- a/src/lib/uart8250.c +++ /dev/null @@ -1,125 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2003 Eric Biederman - * Copyright (C) 2006-2010 coresystems GmbH - * - * 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; version 2 of the License. - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <arch/io.h> -#include <console/uart.h> -#include <trace.h> -#include "drivers/uart/uart8250reg.h" - -/* Should support 8250, 16450, 16550, 16550A type UARTs */ - -/* Expected character delay at 1200bps is 9ms for a working UART - * and no flow-control. Assume UART as stuck if shift register - * or FIFO takes more than 50ms per character to appear empty. - * - * Estimated that inb() from UART takes 1 microsecond. - */ -#define SINGLE_CHAR_TIMEOUT (50 * 1000) -#define FIFO_TIMEOUT (16 * SINGLE_CHAR_TIMEOUT) - -static inline int uart8250_can_tx_byte(unsigned base_port) -{ - return inb(base_port + UART_LSR) & UART_LSR_THRE; -} - -static inline void uart8250_wait_to_tx_byte(unsigned base_port) -{ - unsigned long int i = SINGLE_CHAR_TIMEOUT; - while (i-- && !uart8250_can_tx_byte(base_port)); -} - -static inline void uart8250_wait_until_sent(unsigned base_port) -{ - unsigned long int i = FIFO_TIMEOUT; - while (i-- && !(inb(base_port + UART_LSR) & UART_LSR_TEMT)); -} - -static void uart8250_tx_byte(unsigned base_port, unsigned char data) -{ - uart8250_wait_to_tx_byte(base_port); - outb(data, base_port + UART_TBR); -} - -static void uart8250_tx_flush(unsigned base_port) -{ - uart8250_wait_until_sent(base_port); -} - -static int uart8250_can_rx_byte(unsigned base_port) -{ - return inb(base_port + UART_LSR) & UART_LSR_DR; -} - -static unsigned char uart8250_rx_byte(unsigned base_port) -{ - unsigned long int i = SINGLE_CHAR_TIMEOUT; - while (i-- && !uart8250_can_rx_byte(base_port)); - - if (i) - return inb(base_port + UART_RBR); - else - return 0x0; -} - -static void uart8250_init(unsigned base_port, unsigned divisor) -{ - DISABLE_TRACE; - /* Disable interrupts */ - outb(0x0, base_port + UART_IER); - /* Enable FIFOs */ - outb(UART_FCR_FIFO_EN, base_port + UART_FCR); - - /* assert DTR and RTS so the other end is happy */ - outb(UART_MCR_DTR | UART_MCR_RTS, base_port + UART_MCR); - - /* DLAB on */ - outb(UART_LCR_DLAB | CONFIG_TTYS0_LCS, base_port + UART_LCR); - - /* Set Baud Rate Divisor. 12 ==> 9600 Baud */ - outb(divisor & 0xFF, base_port + UART_DLL); - outb((divisor >> 8) & 0xFF, base_port + UART_DLM); - - /* Set to 3 for 8N1 */ - outb(CONFIG_TTYS0_LCS, base_port + UART_LCR); - ENABLE_TRACE; -} - -static const unsigned base = CONFIG_TTYS0_BASE; - -void uart_init(void) -{ - unsigned int div = uart_divisor(115200); - uart8250_init(base, div); -} - -void uart_tx_byte(unsigned char data) -{ - uart8250_tx_byte(base, data); -} - -unsigned char uart_rx_byte(void) -{ - return uart8250_rx_byte(base); -} - -void uart_tx_flush(void) -{ - uart8250_tx_flush(base); -} diff --git a/src/lib/uart8250mem.c b/src/lib/uart8250mem.c deleted file mode 100644 index 3540c4b..0000000 --- a/src/lib/uart8250mem.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2003 Eric Biederman - * Copyright (C) 2006-2010 coresystems GmbH - * - * 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; version 2 of the License. - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <arch/io.h> -#include <console/uart.h> -#include <delay.h> -#include "drivers/uart/uart8250reg.h" - -/* Should support 8250, 16450, 16550, 16550A type UARTs */ - -/* Expected character delay at 1200bps is 9ms for a working UART - * and no flow-control. Assume UART as stuck if shift register - * or FIFO takes more than 50ms per character to appear empty. - */ -#define SINGLE_CHAR_TIMEOUT (50 * 1000) -#define FIFO_TIMEOUT (16 * SINGLE_CHAR_TIMEOUT) - -static inline int uart8250_mem_can_tx_byte(unsigned base_port) -{ - return read8(base_port + UART_LSR) & UART_LSR_THRE; -} - -static inline void uart8250_mem_wait_to_tx_byte(unsigned base_port) -{ - unsigned long int i = SINGLE_CHAR_TIMEOUT; - while(i-- && !uart8250_mem_can_tx_byte(base_port)) - udelay(1); -} - -static inline void uart8250_mem_wait_until_sent(unsigned base_port) -{ - unsigned long int i = FIFO_TIMEOUT; - while(i-- && !(read8(base_port + UART_LSR) & UART_LSR_TEMT)) - udelay(1); -} - -static void uart8250_mem_tx_byte(unsigned base_port, unsigned char data) -{ - uart8250_mem_wait_to_tx_byte(base_port); - write8(base_port + UART_TBR, data); -} - -static void uart8250_mem_tx_flush(unsigned base_port) -{ - uart8250_mem_wait_until_sent(base_port); -} - -static int uart8250_mem_can_rx_byte(unsigned base_port) -{ - return read8(base_port + UART_LSR) & UART_LSR_DR; -} - -static unsigned char uart8250_mem_rx_byte(unsigned base_port) -{ - unsigned long int i = SINGLE_CHAR_TIMEOUT; - while(i-- && !uart8250_mem_can_rx_byte(base_port)) - udelay(1); - if (i) - return read8(base_port + UART_RBR); - else - return 0x0; -} - -static void uart8250_mem_init(unsigned base_port, unsigned divisor) -{ - /* Disable interrupts */ - write8(base_port + UART_IER, 0x0); - /* Enable FIFOs */ - write8(base_port + UART_FCR, UART_FCR_FIFO_EN); - - /* Assert DTR and RTS so the other end is happy */ - write8(base_port + UART_MCR, UART_MCR_DTR | UART_MCR_RTS); - - /* DLAB on */ - write8(base_port + UART_LCR, UART_LCR_DLAB | CONFIG_TTYS0_LCS); - - /* Set Baud Rate Divisor. 12 ==> 9600 Baud */ - write8(base_port + UART_DLL, divisor & 0xFF); - write8(base_port + UART_DLM, (divisor >> 8) & 0xFF); - - /* Set to 3 for 8N1 */ - write8(base_port + UART_LCR, CONFIG_TTYS0_LCS); -} - - -void uart_init(void) -{ - u32 base = uart_platform_base(0); - if (!base) - return; - - unsigned div = uart_platform_divisor(); - uart8250_mem_init(base, div); -} - -void uart_tx_byte(unsigned char data) -{ - u32 base = uart_platform_base(0); - if (!base) - return; - uart8250_mem_tx_byte(base, data); -} - -unsigned char uart_rx_byte(void) -{ - u32 base = uart_platform_base(0); - if (!base) - return 0xff; - return uart8250_mem_rx_byte(base); -} - -void uart_tx_flush(void) -{ - u32 base = uart_platform_base(0); - if (!base) - return; - uart8250_mem_tx_flush(base); -}
-
Kyösti Mälkki