drop one more version of doing serial uart output differently.

coreboot made it kind of complicated to print a character on serial. Not quite
as complicated as UEFI, but too much for a good design. Fix it.

Signed-off-by: Stefan Reinauer <stepan@coreboot.org>
Acked-by: Stefan Reinauer <stepan@coreboot.org>




git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6191 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 138 insertions, 2 deletions

diff --git a/src/include/uart8250.h b/src/include/uart8250.h
index dc09315dea..47cc88ed01 100644
--- a/src/include/uart8250.h
+++ b/src/include/uart8250.h
@@ -1,15 +1,151 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2003 Eric Biederman
+ *
+ * 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
+ */
+
 #ifndef UART8250_H
 #define UART8250_H
 
+/* Base Address */
+#ifndef CONFIG_TTYS0_BASE
+#define CONFIG_TTYS0_BASE 0x3f8
+#endif
+
+#ifndef CONFIG_TTYS0_BAUD
+#define CONFIG_TTYS0_BAUD 115200
+#endif
+
+#ifndef CONFIG_TTYS0_DIV
+#if ((115200%CONFIG_TTYS0_BAUD) != 0)
+#error Bad ttys0 baud rate
+#endif
+#define CONFIG_TTYS0_DIV	(115200/CONFIG_TTYS0_BAUD)
+#endif
+
+/* Line Control Settings */
+#ifndef CONFIG_TTYS0_LCS
+/* Set 8bit, 1 stop bit, no parity */
+#define CONFIG_TTYS0_LCS	0x3
+#endif
+
+#define UART_LCS	CONFIG_TTYS0_LCS
+
+
+/* Data */
+#define UART_RBR 0x00
+#define UART_TBR 0x00
+
+/* Control */
+#define UART_IER 0x01
+#define   UART_IER_MSI		0x08 /* Enable Modem status interrupt */
+#define   UART_IER_RLSI		0x04 /* Enable receiver line status interrupt */
+#define   UART_IER_THRI		0x02 /* Enable Transmitter holding register int. */
+#define   UART_IER_RDI		0x01 /* Enable receiver data interrupt */
+
+#define UART_IIR 0x02
+#define   UART_IIR_NO_INT	0x01 /* No interrupts pending */
+#define   UART_IIR_ID		0x06 /* Mask for the interrupt ID */
+
+#define   UART_IIR_MSI		0x00 /* Modem status interrupt */
+#define   UART_IIR_THRI		0x02 /* Transmitter holding register empty */
+#define   UART_IIR_RDI		0x04 /* Receiver data interrupt */
+#define   UART_IIR_RLSI		0x06 /* Receiver line status interrupt */
+
+#define UART_FCR 0x02
+#define   UART_FCR_FIFO_EN	0x01 /* Fifo enable */
+#define   UART_FCR_CLEAR_RCVR	0x02 /* Clear the RCVR FIFO */
+#define   UART_FCR_CLEAR_XMIT	0x04 /* Clear the XMIT FIFO */
+#define   UART_FCR_DMA_SELECT	0x08 /* For DMA applications */
+#define   UART_FCR_TRIGGER_MASK	0xC0 /* Mask for the FIFO trigger range */
+#define   UART_FCR_TRIGGER_1	0x00 /* Mask for trigger set at 1 */
+#define   UART_FCR_TRIGGER_4	0x40 /* Mask for trigger set at 4 */
+#define   UART_FCR_TRIGGER_8	0x80 /* Mask for trigger set at 8 */
+#define   UART_FCR_TRIGGER_14	0xC0 /* Mask for trigger set at 14 */
+
+#define   UART_FCR_RXSR		0x02 /* Receiver soft reset */
+#define   UART_FCR_TXSR		0x04 /* Transmitter soft reset */
+
+#define UART_LCR 0x03
+#define   UART_LCR_WLS_MSK	0x03 /* character length select mask */
+#define   UART_LCR_WLS_5	0x00 /* 5 bit character length */
+#define   UART_LCR_WLS_6	0x01 /* 6 bit character length */
+#define   UART_LCR_WLS_7	0x02 /* 7 bit character length */
+#define   UART_LCR_WLS_8	0x03 /* 8 bit character length */
+#define   UART_LCR_STB		0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
+#define   UART_LCR_PEN		0x08 /* Parity eneble */
+#define   UART_LCR_EPS		0x10 /* Even Parity Select */
+#define   UART_LCR_STKP		0x20 /* Stick Parity */
+#define   UART_LCR_SBRK		0x40 /* Set Break */
+#define   UART_LCR_BKSE		0x80 /* Bank select enable */
+#define   UART_LCR_DLAB		0x80 /* Divisor latch access bit */
+
+#define UART_MCR 0x04
+#define   UART_MCR_DTR		0x01 /* DTR   */
+#define   UART_MCR_RTS		0x02 /* RTS   */
+#define   UART_MCR_OUT1		0x04 /* Out 1 */
+#define   UART_MCR_OUT2		0x08 /* Out 2 */
+#define   UART_MCR_LOOP		0x10 /* Enable loopback test mode */
+
+#define UART_MCR_DMA_EN		0x04
+#define UART_MCR_TX_DFR		0x08
+
+#define UART_DLL 0x00
+#define UART_DLM 0x01
+
+/* Status */
+#define UART_LSR 0x05
+#define   UART_LSR_DR		0x01 /* Data ready */
+#define   UART_LSR_OE		0x02 /* Overrun */
+#define   UART_LSR_PE		0x04 /* Parity error */
+#define   UART_LSR_FE		0x08 /* Framing error */
+#define   UART_LSR_BI		0x10 /* Break */
+#define   UART_LSR_THRE		0x20 /* Xmit holding register empty */
+#define   UART_LSR_TEMT		0x40 /* Xmitter empty */
+#define   UART_LSR_ERR		0x80 /* Error */
+
+#define UART_MSR 0x06
+#define   UART_MSR_DCD		0x80 /* Data Carrier Detect */
+#define   UART_MSR_RI		0x40 /* Ring Indicator */
+#define   UART_MSR_DSR		0x20 /* Data Set Ready */
+#define   UART_MSR_CTS		0x10 /* Clear to Send */
+#define   UART_MSR_DDCD		0x08 /* Delta DCD */
+#define   UART_MSR_TERI		0x04 /* Trailing edge ring indicator */
+#define   UART_MSR_DDSR		0x02 /* Delta DSR */
+#define   UART_MSR_DCTS		0x01 /* Delta CTS */
+
+#define UART_SCR 0x07
+
+
+#ifndef __ROMCC__
+// Can't we just drop this? It seems silly.
 struct uart8250 {
 	unsigned int baud;
-	/* Do I need an lcs parameter here? */
 };
 
 unsigned char uart8250_rx_byte(unsigned base_port);
 int uart8250_can_rx_byte(unsigned base_port);
 void uart8250_tx_byte(unsigned base_port, unsigned char data);
-void uart8250_init(unsigned base_port, unsigned divisor, unsigned lcs);
+
+/* Yes it is silly to have three different uart init functions. But we used to
+ * have three different sets of uart code, so it's an improvement.
+ */
+void uart8250_init(unsigned base_port, unsigned divisor);
 void init_uart8250(unsigned base_port, struct uart8250 *uart);
+void uart_init(void);
+#endif
 
 #endif /* UART8250_H */