Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / serial / lpc32xx_hsuart.c

diff --git a/qemu/roms/u-boot/drivers/serial/lpc32xx_hsuart.c b/qemu/roms/u-boot/drivers/serial/lpc32xx_hsuart.c
new file mode 100644 (file)
index 0000000..c8926a8
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/serial/lpc32xx_hsuart.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2011 Vladimir Zapolskiy <vz@mleia.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/uart.h>
+#include <asm/io.h>
+#include <serial.h>
+#include <linux/compiler.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct hsuart_regs *hsuart = (struct hsuart_regs *)HS_UART_BASE;
+
+static void lpc32xx_serial_setbrg(void)
+{
+       u32 div;
+
+       /* UART rate = PERIPH_CLK / ((HSU_RATE + 1) x 14) */
+       div = (get_serial_clock() / 14 + gd->baudrate / 2) / gd->baudrate - 1;
+       if (div > 255)
+               div = 255;
+
+       writel(div, &hsuart->rate);
+}
+
+static int lpc32xx_serial_getc(void)
+{
+       while (!(readl(&hsuart->level) & HSUART_LEVEL_RX))
+               /* NOP */;
+
+       return readl(&hsuart->rx) & HSUART_RX_DATA;
+}
+
+static void lpc32xx_serial_putc(const char c)
+{
+       if (c == '\n')
+               serial_putc('\r');
+
+       writel(c, &hsuart->tx);
+
+       /* Wait for character to be sent */
+       while (readl(&hsuart->level) & HSUART_LEVEL_TX)
+               /* NOP */;
+}
+
+static int lpc32xx_serial_tstc(void)
+{
+       if (readl(&hsuart->level) & HSUART_LEVEL_RX)
+               return 1;
+
+       return 0;
+}
+
+static int lpc32xx_serial_init(void)
+{
+       lpc32xx_serial_setbrg();
+
+       /* Disable hardware RTS and CTS flow control, set up RX and TX FIFO */
+       writel(HSUART_CTRL_TMO_16 | HSUART_CTRL_HSU_OFFSET(20) |
+              HSUART_CTRL_HSU_RX_TRIG_32 | HSUART_CTRL_HSU_TX_TRIG_0,
+              &hsuart->ctrl);
+       return 0;
+}
+
+static struct serial_device lpc32xx_serial_drv = {
+       .name   = "lpc32xx_serial",
+       .start  = lpc32xx_serial_init,
+       .stop   = NULL,
+       .setbrg = lpc32xx_serial_setbrg,
+       .putc   = lpc32xx_serial_putc,
+       .puts   = default_serial_puts,
+       .getc   = lpc32xx_serial_getc,
+       .tstc   = lpc32xx_serial_tstc,
+};
+
+void lpc32xx_serial_initialize(void)
+{
+       serial_register(&lpc32xx_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+       return &lpc32xx_serial_drv;
+}