Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / serial / altera_uart.c

diff --git a/qemu/roms/u-boot/drivers/serial/altera_uart.c b/qemu/roms/u-boot/drivers/serial/altera_uart.c
new file mode 100644 (file)
index 0000000..d620528
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/serial/altera_uart.c
@@ -0,0 +1,100 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <watchdog.h>
+#include <asm/io.h>
+#include <nios2-io.h>
+#include <linux/compiler.h>
+#include <serial.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*------------------------------------------------------------------
+ * UART the serial port
+ *-----------------------------------------------------------------*/
+
+static nios_uart_t *uart = (nios_uart_t *) CONFIG_SYS_NIOS_CONSOLE;
+
+#if defined(CONFIG_SYS_NIOS_FIXEDBAUD)
+
+/*
+ * Everything's already setup for fixed-baud PTF
+ * assignment
+ */
+static void altera_serial_setbrg(void)
+{
+}
+
+static int altera_serial_init(void)
+{
+       return 0;
+}
+
+#else
+
+static void altera_serial_setbrg(void)
+{
+       unsigned div;
+
+       div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
+       writel (div, &uart->divisor);
+}
+
+static int altera_serial_init(void)
+{
+       serial_setbrg();
+       return 0;
+}
+
+#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */
+
+/*-----------------------------------------------------------------------
+ * UART CONSOLE
+ *---------------------------------------------------------------------*/
+static void altera_serial_putc(char c)
+{
+       if (c == '\n')
+               serial_putc ('\r');
+       while ((readl (&uart->status) & NIOS_UART_TRDY) == 0)
+               WATCHDOG_RESET ();
+       writel ((unsigned char)c, &uart->txdata);
+}
+
+static int altera_serial_tstc(void)
+{
+       return (readl (&uart->status) & NIOS_UART_RRDY);
+}
+
+static int altera_serial_getc(void)
+{
+       while (serial_tstc () == 0)
+               WATCHDOG_RESET ();
+       return (readl (&uart->rxdata) & 0x00ff );
+}
+
+static struct serial_device altera_serial_drv = {
+       .name   = "altera_serial",
+       .start  = altera_serial_init,
+       .stop   = NULL,
+       .setbrg = altera_serial_setbrg,
+       .putc   = altera_serial_putc,
+       .puts   = default_serial_puts,
+       .getc   = altera_serial_getc,
+       .tstc   = altera_serial_tstc,
+};
+
+void altera_serial_initialize(void)
+{
+       serial_register(&altera_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+       return &altera_serial_drv;
+}