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Diffstat (limited to 'src/soc/broadcom/cygnus/ns16550.c')
-rw-r--r--src/soc/broadcom/cygnus/ns16550.c128
1 files changed, 0 insertions, 128 deletions
diff --git a/src/soc/broadcom/cygnus/ns16550.c b/src/soc/broadcom/cygnus/ns16550.c
deleted file mode 100644
index 0223278b04..0000000000
--- a/src/soc/broadcom/cygnus/ns16550.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2000 Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
- * Copyright (C) Broadcom Corporation
- * Copyright (C) 2015 Google Inc.
- *
- * 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.
- */
-
-#include <arch/io.h>
-#include <boot/coreboot_tables.h>
-#include <console/uart.h>
-#include <delay.h>
-#include <soc/ns16550.h>
-
-#define SYS_NS16550_CLK 100000000
-#define SYS_NS16550_BAUDRATE 115200
-#define MODE_X_DIV 16
-#define SINGLE_CHAR_TIMEOUT (50 * 1000)
-
-static struct ns16550 * const regs =
- (void *)CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
-
-static int calc_divisor(void)
-{
- /* Compute divisor value. Normally, we should simply return:
- * ns16550_clk / MODE_X_DIV / baudrate
- * but we need to round that value by adding 0.5.
- * Rounding is especially important at high baud rates.
- */
- int div = MODE_X_DIV * SYS_NS16550_BAUDRATE;
- return (SYS_NS16550_CLK + div / 2) / div;
-}
-
-static void ns16550_init(void)
-{
- int baud_divisor = calc_divisor();
-
- while (!(read32(&regs->lsr) & UART_LSR_TEMT))
- ;
-
- write32(&regs->ier, 0);
- write32(&regs->lcr, UART_LCR_BKSE | UART_LCR_8N1);
- write32(&regs->dll, 0);
- write32(&regs->dlm, 0);
- write32(&regs->lcr, UART_LCR_8N1);
- write32(&regs->mcr, UART_MCR_DTR | UART_MCR_RTS);
- /* clear & enable FIFOs */
- write32(&regs->fcr, UART_FCR_FIFO_EN | UART_FCR_RXSR | UART_FCR_TXSR);
- write32(&regs->lcr, UART_LCR_BKSE | UART_LCR_8N1);
- write32(&regs->dll, baud_divisor & 0xff);
- write32(&regs->dlm, (baud_divisor >> 8) & 0xff);
- write32(&regs->lcr, UART_LCR_8N1);
-}
-
-static void ns16550_tx_byte(unsigned char data)
-{
- while ((read32(&regs->lsr) & UART_LSR_THRE) == 0)
- ;
- write32(&regs->thr, data);
-}
-
-static void ns16550_tx_flush(void)
-{
- while (!(read32(&regs->lsr) & UART_LSR_TEMT))
- ;
-}
-
-static int ns16550_tst_byte(void)
-{
- return (read32(&regs->lsr) & UART_LSR_DR) != 0;
-}
-
-static unsigned char ns16550_rx_byte(void)
-{
- unsigned long int i = SINGLE_CHAR_TIMEOUT;
- while (i && !ns16550_tst_byte()) {
- udelay(1);
- i--;
- }
- if (i)
- return read32(&regs->rbr);
- else
- return 0x0;
-}
-
-void uart_init(int idx)
-{
- ns16550_init();
-}
-
-void uart_tx_byte(int idx, unsigned char data)
-{
- ns16550_tx_byte(data);
-}
-
-void uart_tx_flush(int idx)
-{
- ns16550_tx_flush();
-}
-
-unsigned char uart_rx_byte(int idx)
-{
- return ns16550_rx_byte();
-}
-
-#ifndef __PRE_RAM__
-void uart_fill_lb(void *data)
-{
- struct lb_serial serial;
- serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
- serial.baseaddr = (uintptr_t)regs;
- serial.baud = get_uart_baudrate();
- serial.regwidth = 4;
- lb_add_serial(&serial, data);
-
- lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
-}
-#endif