imgtec/pistachio: Bring uart driver to modern standards

The console interface changed in upstream, and the
driver didn't reflect that yet.
This wasn't obvious because the driver wasn't compiled
at all.

Change-Id: Id18391e62e7ebd8f5fc929838ce27bf414e364f9
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/9165
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/arch/mips/Makefile.inc

@@ -37,7 +37,6 @@ ifeq ($(CONFIG_ARCH_BOOTBLOCK_MIPS),y)
 bootblock-y += boot.c
 bootblock-y += bootblock.S
 bootblock-y += bootblock_simple.c
-bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += early_console.c
 bootblock-y += stages.c
 bootblock-y += timer.c
 bootblock-y += ../../lib/memcpy.c

src/arch/mips/early_console.c

@@ -1,38 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * 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 <console/console.h>
-#include <console/vtxprintf.h>
-
-void console_tx_byte(unsigned char byte)
-{
-	if (byte == '\n')
-		console_tx_byte('\r');
-
-#if CONFIG_CONSOLE_SERIAL_UART
-	uart_tx_byte(byte);
-#endif
-}
-
-void console_tx_flush(void)
-{
-#if CONFIG_CONSOLE_SERIAL_UART
-	uart_tx_flush();
-#endif
-}

src/soc/imgtec/pistachio/Makefile.inc

@@ -24,7 +24,7 @@ bootblock-y += spi.c
 romstage-y += spi.c
 ramstage-y += spi.c
 
-ifeq ($(CONFIG_CONSOLE_SERIAL_UART),y)
+ifeq ($(CONFIG_DRIVERS_UART),y)
 bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
 romstage-y += uart.c
 ramstage-y += uart.c

src/soc/imgtec/pistachio/uart.c

@@ -22,11 +22,12 @@
  */
 
 #include <arch/io.h>
+#include <boot/coreboot_tables.h>
 #include <console/console.h>
+#include <console/uart.h>
 #include <device/device.h>
 #include <delay.h>
-#include <uart.h>
-#include <uart8250.h>
+#include <drivers/uart/uart8250reg.h>
 
 /* Should support 8250, 16450, 16550, 16550A type UARTs */
 
@@ -115,13 +116,13 @@ static void uart8250_mem_init(unsigned base_port, unsigned divisor)
 	write_lcr(base_port, CONFIG_TTYS0_LCS);
 }
 
-static unsigned int uart_platform_refclk(void)
+unsigned int uart_platform_refclk(void)
 {
 	/* TODO: this is entirely arbitrary */
 	return 1000000;
 }
 
-static unsigned int uart_platform_base(int idx)
+uintptr_t uart_platform_base(int idx)
 {
 	switch (idx) {
 	case 0:
@@ -135,16 +136,9 @@ static unsigned int uart_platform_base(int idx)
 	}
 }
 
-/* Calculate divisor. Do not floor but round to nearest integer. */
-static unsigned int uart_baudrate_divisor(unsigned int baudrate,
-	unsigned int refclk, unsigned int oversample)
+void uart_init(int idx)
 {
-	return (1 + (2 * refclk) / (baudrate * oversample)) / 2;
-}
-
-static void pistachio_uart_init(void)
-{
-	u32 base = uart_platform_base(0);
+	u32 base = uart_platform_base(idx);
 	if (!base)
 		return;
 
@@ -154,64 +148,39 @@ static void pistachio_uart_init(void)
 	uart8250_mem_init(base, div);
 }
 
-static void pistachio_uart_tx_byte(unsigned char data)
+void uart_tx_byte(int idx, unsigned char data)
 {
-	u32 base = uart_platform_base(0);
+	u32 base = uart_platform_base(idx);
 	if (!base)
 		return;
 	uart8250_mem_tx_byte(base, data);
 }
 
-static unsigned char pistachio_uart_rx_byte(void)
+unsigned char uart_rx_byte(int idx)
 {
-	u32 base = uart_platform_base(0);
+	u32 base = uart_platform_base(idx);
 	if (!base)
 		return 0xff;
 	return uart8250_mem_rx_byte(base);
 }
 
-static void pistachio_uart_tx_flush(void)
+void uart_tx_flush(int idx)
 {
-	u32 base = uart_platform_base(0);
+	u32 base = uart_platform_base(idx);
 	if (!base)
 		return;
 	uart8250_mem_tx_flush(base);
 }
 
-#if !defined(__PRE_RAM__)
-
-static const struct console_driver pistachio_uart_console __console = {
-	.init     = pistachio_uart_init,
-	.tx_byte  = pistachio_uart_tx_byte,
-	.tx_flush = pistachio_uart_tx_flush,
-	.rx_byte  = pistachio_uart_rx_byte,
-};
-
-uint32_t uartmem_getbaseaddr(void)
+#ifndef __PRE_RAM__
+void uart_fill_lb(void *data)
 {
-	return uart_platform_base(0);
+	struct lb_serial serial;
+	serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
+	serial.baseaddr = uart_platform_base(CONFIG_UART_FOR_CONSOLE);
+	serial.baud = default_baudrate();
+	lb_add_serial(&serial, data);
+
+	lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
 }
-
-#else /* __PRE_RAM__ */
-
-void uart_init(void)
-{
-	pistachio_uart_init();
-}
-
-void uart_tx_byte(unsigned char data)
-{
-	pistachio_uart_tx_byte(data);
-}
-
-unsigned char uart_rx_byte(void)
-{
-	return pistachio_uart_rx_byte();
-}
-
-void uart_tx_flush(void)
-{
-	pistachio_uart_tx_flush();
-}
-
-#endif /* __PRE_RAM__ */
+#endif