Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / serial / serial_ks8695.c

diff --git a/qemu/roms/u-boot/drivers/serial/serial_ks8695.c b/qemu/roms/u-boot/drivers/serial/serial_ks8695.c
new file mode 100644 (file)
index 0000000..13adabd
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/serial/serial_ks8695.c
@@ -0,0 +1,121 @@
+/*
+ * serial.c -- KS8695 serial driver
+ *
+ * (C) Copyright 2004, Greg Ungerer <greg.ungerer@opengear.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/platform.h>
+#include <serial.h>
+#include <linux/compiler.h>
+
+#ifndef CONFIG_SERIAL1
+#error "Bad: you didn't configure serial ..."
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ *     Define the UART hardware register access structure.
+ */
+struct ks8695uart {
+       unsigned int    RX;             /* 0x00 - Receive data (r) */
+       unsigned int    TX;             /* 0x04 - Transmit data (w) */
+       unsigned int    FCR;            /* 0x08 - Fifo Control (r/w) */
+       unsigned int    LCR;            /* 0x0c - Line Control (r/w) */
+       unsigned int    MCR;            /* 0x10 - Modem Control (r/w) */
+       unsigned int    LSR;            /* 0x14 - Line Status (r/w) */
+       unsigned int    MSR;            /* 0x18 - Modem Status (r/w) */
+       unsigned int    BD;             /* 0x1c - Baud Rate (r/w) */
+       unsigned int    SR;             /* 0x20 - Status (r/w) */
+};
+
+#define        KS8695_UART_ADDR        ((void *) (KS8695_IO_BASE + KS8695_UART_RX_BUFFER))
+#define        KS8695_UART_CLK         25000000
+
+
+/*
+ * Under some circumstances we want to be "quiet" and not issue any
+ * serial output - though we want u-boot to otherwise work and behave
+ * the same. By default be noisy.
+ */
+int serial_console = 1;
+
+
+static void ks8695_serial_setbrg(void)
+{
+       volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+
+       /* Set to global baud rate and 8 data bits, no parity, 1 stop bit*/
+       uartp->BD = KS8695_UART_CLK / gd->baudrate;
+       uartp->LCR = KS8695_UART_LINEC_WLEN8;
+}
+
+static int ks8695_serial_init(void)
+{
+       serial_console = 1;
+       serial_setbrg();
+       return 0;
+}
+
+static void ks8695_serial_raw_putc(const char c)
+{
+       volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+       int i;
+
+       for (i = 0; (i < 0x100000); i++) {
+               if (uartp->LSR & KS8695_UART_LINES_TXFE)
+                       break;
+       }
+
+       uartp->TX = c;
+}
+
+static void ks8695_serial_putc(const char c)
+{
+       if (serial_console) {
+               ks8695_serial_raw_putc(c);
+               if (c == '\n')
+                       ks8695_serial_raw_putc('\r');
+       }
+}
+
+static int ks8695_serial_tstc(void)
+{
+       volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+       if (serial_console)
+               return ((uartp->LSR & KS8695_UART_LINES_RXFE) ? 1 : 0);
+       return 0;
+}
+
+static int ks8695_serial_getc(void)
+{
+       volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+
+       while ((uartp->LSR & KS8695_UART_LINES_RXFE) == 0)
+               ;
+       return (uartp->RX);
+}
+
+static struct serial_device ks8695_serial_drv = {
+       .name   = "ks8695_serial",
+       .start  = ks8695_serial_init,
+       .stop   = NULL,
+       .setbrg = ks8695_serial_setbrg,
+       .putc   = ks8695_serial_putc,
+       .puts   = default_serial_puts,
+       .getc   = ks8695_serial_getc,
+       .tstc   = ks8695_serial_tstc,
+};
+
+void ks8695_serial_initialize(void)
+{
+       serial_register(&ks8695_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+       return &ks8695_serial_drv;
+}