uart8250io: Unify calls with generic UART

Change-Id: I6d56648e56f2177e1d5332497321e718df18300c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5234
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/arch/x86/lib/romcc_console.c

@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <console/loglevel.h>
 #include <console/post_codes.h>
+#include <console/uart.h>
 #include <console/ne2k.h>
 
 /* __PRE_RAM__ */
@@ -28,9 +29,6 @@
  * we could use the same code on all architectures.
  */
 #define console_loglevel CONFIG_DEFAULT_CONSOLE_LOGLEVEL
-#if CONFIG_CONSOLE_SERIAL8250
-#include <uart8250.h>
-#endif
 
 #if CONFIG_CONSOLE_SERIAL8250
 #include "drivers/uart/util.c"
@@ -43,7 +41,7 @@
 static void __console_tx_byte(unsigned char byte)
 {
 #if CONFIG_CONSOLE_SERIAL8250
-	uart8250_tx_byte(CONFIG_TTYS0_BASE, byte);
+	uart_tx_byte(byte);
 #endif
 #if CONFIG_CONSOLE_NE2K
 	ne2k_append_data_byte(byte, CONFIG_CONSOLE_NE2K_IO_PORT);
@@ -64,7 +62,7 @@ static void __console_tx_char(int loglevel, unsigned char byte)
 {
 	if (console_loglevel >= loglevel) {
 #if CONFIG_CONSOLE_SERIAL8250
-		uart8250_tx_byte(CONFIG_TTYS0_BASE, byte);
+		uart_tx_byte(byte);
 #endif
 #if CONFIG_CONSOLE_NE2K
 		ne2k_append_data_byte(byte, CONFIG_CONSOLE_NE2K_IO_PORT);

src/arch/x86/lib/romstage_console.c

@@ -26,7 +26,7 @@
 #include <console/spkmodem.h>
 #include <console/vtxprintf.h>
 
-#if CONFIG_CONSOLE_SERIAL8250 || CONFIG_CONSOLE_SERIAL8250MEM
+#if CONFIG_CONSOLE_SERIAL8250MEM
 #include <uart8250.h>
 #endif
 
@@ -42,7 +42,7 @@ void console_tx_byte(unsigned char byte)
 	}
 #endif
 #if CONFIG_CONSOLE_SERIAL8250
-	uart8250_tx_byte(CONFIG_TTYS0_BASE, byte);
+	uart_tx_byte(byte);
 #endif
 #if CONFIG_USBDEBUG && (CONFIG_USBDEBUG_IN_ROMSTAGE || !defined(__PRE_RAM__))
 	usb_tx_byte(0, byte);
@@ -64,7 +64,7 @@ void console_tx_flush(void)
 	uart8250_mem_tx_flush(CONFIG_OXFORD_OXPCIE_BASE_ADDRESS + 0x1000);
 #endif
 #if CONFIG_CONSOLE_SERIAL8250
-	uart8250_tx_flush(CONFIG_TTYS0_BASE);
+	uart_tx_flush();
 #endif
 #if CONFIG_CONSOLE_NE2K
 	ne2k_transmit(CONFIG_CONSOLE_NE2K_IO_PORT);

src/console/uart8250_console.c

@@ -19,7 +19,6 @@
 
 #include <console/console.h>
 #include <console/uart.h>
-#include <uart8250.h>
 
 static void ttyS0_init(void)
 {
@@ -28,22 +27,22 @@ static void ttyS0_init(void)
 
 static void ttyS0_tx_byte(unsigned char data)
 {
-	uart8250_tx_byte(CONFIG_TTYS0_BASE, data);
+	uart_tx_byte(data);
 }
 
 static void ttyS0_tx_flush(void)
 {
-	uart8250_tx_flush(CONFIG_TTYS0_BASE);
+	uart_tx_flush();
 }
 
 static unsigned char ttyS0_rx_byte(void)
 {
-	return uart8250_rx_byte(CONFIG_TTYS0_BASE);
+	return uart_rx_byte();
 }
 
 static int ttyS0_tst_byte(void)
 {
-	return uart8250_can_rx_byte(CONFIG_TTYS0_BASE);
+	return uart_can_rx_byte();
 }
 
 static const struct console_driver uart8250_console __console = {

src/cpu/x86/smm/smiutil.c

@@ -45,7 +45,7 @@ void console_tx_byte(unsigned char byte)
 		uart8250_mem_tx_byte(serial8250mem_base_address, byte);
 #endif
 #if CONFIG_CONSOLE_SERIAL8250
-	uart8250_tx_byte(CONFIG_TTYS0_BASE, byte);
+	uart_tx_byte(byte);
 #endif
 }
 

src/include/console/uart.h

@@ -37,10 +37,11 @@ unsigned int uart_baudrate_divisor(unsigned int baudrate,
 	unsigned int refclk, unsigned int oversample);
 
 
-unsigned char uart_rx_byte(void);
+void uart_init(void);
 void uart_tx_byte(unsigned char data);
 void uart_tx_flush(void);
-void uart_init(void);
+unsigned char uart_rx_byte(void);
+int uart_can_rx_byte(void);
 
 uint32_t uartmem_getbaseaddr(void);
 

src/include/uart8250.h

@@ -105,16 +105,6 @@
 #define UART_SCR 0x07
 #define UART_SPR 0x07
 
-#if CONFIG_CONSOLE_SERIAL8250
-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_tx_flush(unsigned base_port);
-/* 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);
-#endif
 #if CONFIG_CONSOLE_SERIAL8250MEM
 void uartmem_init(void);
 

src/lib/uart8250.c

@@ -40,40 +40,30 @@
 #define SINGLE_CHAR_TIMEOUT	(50 * 1000)
 #define FIFO_TIMEOUT		(16 * SINGLE_CHAR_TIMEOUT)
 
-static inline int uart8250_can_tx_byte(unsigned base_port)
+static 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)
+static void uart8250_tx_byte(unsigned base_port, unsigned char data)
 {
 	unsigned long int i = SINGLE_CHAR_TIMEOUT;
 	while (i-- && !uart8250_can_tx_byte(base_port));
+	outb(data, base_port + UART_TBR);
 }
 
-static inline void uart8250_wait_until_sent(unsigned base_port)
+static void uart8250_tx_flush(unsigned base_port)
 {
 	unsigned long int i = FIFO_TIMEOUT;
 	while (i-- && !(inb(base_port + UART_LSR) & UART_LSR_TEMT));
 }
 
-void uart8250_tx_byte(unsigned base_port, unsigned char data)
+static int uart8250_can_rx_byte(unsigned base_port)
-{
-	uart8250_wait_to_tx_byte(base_port);
-	outb(data, base_port + UART_TBR);
-}
-
-void uart8250_tx_flush(unsigned base_port)
-{
-	uart8250_wait_until_sent(base_port);
-}
-
-int uart8250_can_rx_byte(unsigned base_port)
 {
 	return inb(base_port + UART_LSR) & UART_LSR_DR;
 }
 
-unsigned char uart8250_rx_byte(unsigned base_port)
+static unsigned char uart8250_rx_byte(unsigned base_port)
 {
 	unsigned long int i = SINGLE_CHAR_TIMEOUT;
 	while (i-- && !uart8250_can_rx_byte(base_port));
@@ -84,7 +74,7 @@ unsigned char uart8250_rx_byte(unsigned base_port)
 		return 0x0;
 }
 
-void uart8250_init(unsigned base_port, unsigned divisor)
+static void uart8250_init(unsigned base_port, unsigned divisor)
 {
 	DISABLE_TRACE;
 	/* Disable interrupts */
@@ -107,10 +97,35 @@ void uart8250_init(unsigned base_port, unsigned divisor)
 	ENABLE_TRACE;
 }
 
+/* FIXME: Needs uart index from Kconfig.
+ * Already use array as a work-around for ROMCC.
+ */
+static const unsigned bases[1] = { CONFIG_TTYS0_BASE };
+
 void uart_init(void)
 {
 	unsigned int div;
 	div = uart_baudrate_divisor(default_baudrate(), BAUDRATE_REFCLK,
 		BAUDRATE_OVERSAMPLE);
-	uart8250_init(CONFIG_TTYS0_BASE, div);
+	uart8250_init(bases[0], div);
+}
+
+void uart_tx_byte(unsigned char data)
+{
+	uart8250_tx_byte(bases[0], data);
+}
+
+unsigned char uart_rx_byte(void)
+{
+	return uart8250_rx_byte(bases[0]);
+}
+
+int uart_can_rx_byte(void)
+{
+	return uart8250_can_rx_byte(bases[0]);
+}
+
+void uart_tx_flush(void)
+{
+	uart8250_tx_flush(bases[0]);
 }