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Diffstat (limited to 'qemu/roms/u-boot/drivers/serial/serial_ks8695.c')
-rw-r--r--qemu/roms/u-boot/drivers/serial/serial_ks8695.c121
1 files changed, 121 insertions, 0 deletions
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
index 000000000..13adabd11
--- /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;
+}