1 files changed, 154 insertions, 0 deletions
diff --git a/roms/u-boot/arch/sparc/cpu/leon2/serial.c b/roms/u-boot/arch/sparc/cpu/leon2/serial.c
new file mode 100644
index 00000000..5cfbb9ed
--- /dev/null
+++ b/roms/u-boot/arch/sparc/cpu/leon2/serial.c
@@ -0,0 +1,154 @@
+/* GRLIB APBUART Serial controller driver
+ *
+ * (C) Copyright 2008
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/leon.h>
+#include <serial.h>
+#include <linux/compiler.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int leon2_serial_init(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+	unsigned int tmp;
+
+	/* Init LEON2 UART
+	 *
+	 * Set scaler / baud rate
+	 *
+	 * Receiver & transmitter enable
+	 */
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	regs->UART_Scaler = CONFIG_SYS_LEON2_UART1_SCALER;
+
+	/* Let bit 11 be unchanged (debug bit for GRMON) */
+	tmp = READ_WORD(regs->UART_Control);
+
+	regs->UART_Control = ((tmp & LEON2_UART_CTRL_DBG) |
+			      (LEON2_UART1_LOOPBACK_ENABLE << 7) |
+			      (LEON2_UART1_FLOWCTRL_ENABLE << 6) |
+			      (LEON2_UART1_PARITY_ENABLE << 5) |
+			      (LEON2_UART1_ODDPAR_ENABLE << 4) |
+			      LEON2_UART_CTRL_RE | LEON2_UART_CTRL_TE);
+
+	return 0;
+}
+
+static void leon2_serial_putc_raw(const char c)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	/* Wait for last character to go. */
+	while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_THE)) ;
+
+	/* Send data */
+	regs->UART_Channel = c;
+
+#ifdef LEON_DEBUG
+	/* Wait for data to be sent */
+	while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_TSE)) ;
+#endif
+}
+
+static void leon2_serial_putc(const char c)
+{
+	if (c == '\n')
+		leon2_serial_putc_raw('\r');
+
+	leon2_serial_putc_raw(c);
+}
+
+static int leon2_serial_getc(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	/* Wait for a character to arrive. */
+	while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_DR)) ;
+
+	/* read data */
+	return READ_WORD(regs->UART_Channel);
+}
+
+static int leon2_serial_tstc(void)
+{
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	return (READ_WORD(regs->UART_Status) & LEON2_UART_STAT_DR);
+}
+
+/* set baud rate for uart */
+static void leon2_serial_setbrg(void)
+{
+	/* update baud rate settings, read it from gd->baudrate */
+	unsigned int scaler;
+	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+	LEON2_Uart_regs *regs;
+
+#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
+#else
+	regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
+#endif
+
+	if (gd->baudrate > 0) {
+		scaler =
+		    (((CONFIG_SYS_CLK_FREQ * 10) / (gd->baudrate * 8)) -
+		     5) / 10;
+		regs->UART_Scaler = scaler;
+	}
+}
+
+static struct serial_device leon2_serial_drv = {
+	.name	= "leon2_serial",
+	.start	= leon2_serial_init,
+	.stop	= NULL,
+	.setbrg	= leon2_serial_setbrg,
+	.putc	= leon2_serial_putc,
+	.puts	= default_serial_puts,
+	.getc	= leon2_serial_getc,
+	.tstc	= leon2_serial_tstc,
+};
+
+void leon2_serial_initialize(void)
+{
+	serial_register(&leon2_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &leon2_serial_drv;
+}