Signed-off-by: Alexander Shiyan <[email protected]>
---
drivers/serial/Kconfig | 5 ++
drivers/serial/Makefile | 1 +
drivers/serial/serial_clps711x.c | 118 ++++++++++++++++++++++++++++++++++++++
3 files changed, 124 insertions(+), 0 deletions(-)
create mode 100644 drivers/serial/serial_clps711x.c
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 7eb96ed..02bc8bf 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -43,6 +43,11 @@ config DRIVER_SERIAL_BLACKFIN
default y
bool "Blackfin serial driver"
+config DRIVER_SERIAL_CLPS711X
+ depends on ARCH_CLPS711X
+ default y
+ bool "CLPS711X serial driver"
+
config DRIVER_SERIAL_ALTERA
depends on NIOS2
default y
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index e2d56b9..e6f1e22 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_DRIVER_SERIAL_NETX) += serial_netx.o
obj-$(CONFIG_DRIVER_SERIAL_LINUX_CONSOLE) += linux_console.o
obj-$(CONFIG_DRIVER_SERIAL_MPC5XXX) += serial_mpc5xxx.o
obj-$(CONFIG_DRIVER_SERIAL_BLACKFIN) += serial_blackfin.o
+obj-$(CONFIG_DRIVER_SERIAL_CLPS711X) += serial_clps711x.o
obj-$(CONFIG_DRIVER_SERIAL_NS16550) += serial_ns16550.o
obj-$(CONFIG_DRIVER_SERIAL_PL010) += serial_pl010.o
obj-$(CONFIG_DRIVER_SERIAL_S3C) += serial_s3c.o
diff --git a/drivers/serial/serial_clps711x.c b/drivers/serial/serial_clps711x.c
new file mode 100644
index 0000000..462ba9f
--- /dev/null
+++ b/drivers/serial/serial_clps711x.c
@@ -0,0 +1,118 @@
+/*
+ * Simple CLPS711X serial driver
+ *
+ * (C) Copyright 2012 Alexander Shiyan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+#include <linux/clk.h>
+
+#include <mach/clps711x.h>
+
+#define UBRLCR(x) (UBRLCR1 + (x) * 0x1000)
+#define SYSCON(x) (SYSCON1 + (x) * 0x1000)
+#define SYSFLG(x) (SYSFLG1 + (x) * 0x1000)
+#define UARTDR(x) (UARTDR1 + (x) * 0x1000)
+
+static int clps711x_setbaudrate(struct console_device *cdev, int baudrate)
+{
+ int divisor;
+ u32 tmp;
+
+ divisor = (clk_get_rate(cdev->dev->priv) / 16) / baudrate;
+
+ tmp = readl(UBRLCR(cdev->dev->id)) & ~UBRLCR_BAUD_MASK;
+ tmp |= divisor - 1;
+ writel(tmp, UBRLCR(cdev->dev->id));
+
+ return 0;
+}
+
+static void clps711x_init_port(struct console_device *cdev)
+{
+ u32 tmp;
+
+ /* Disable the UART */
+ writel(readl(SYSCON(cdev->dev->id)) & ~SYSCON_UARTEN,
+ SYSCON(cdev->dev->id));
+
+ /* Setup Line Control Register */
+ tmp = readl(UBRLCR(cdev->dev->id)) & UBRLCR_BAUD_MASK;
+ tmp |= UBRLCR_FIFOEN | UBRLCR_WRDLEN8; /* FIFO on, 8N1 mode */
+ writel(tmp, UBRLCR(cdev->dev->id));
+
+ /* Set default baudrate on initialization */
+ clps711x_setbaudrate(cdev, CONFIG_BAUDRATE);
+
+ /* Enable the UART */
+ writel(readl(SYSCON(cdev->dev->id)) | SYSCON_UARTEN,
+ SYSCON(cdev->dev->id));
+}
+
+static void clps711x_putc(struct console_device *cdev, char c)
+{
+ /* Wait until there is space in the FIFO */
+ while (readl(SYSFLG(cdev->dev->id)) & SYSFLG_UTXFF) {
+ }
+
+ /* Send the character */
+ writew(c, UARTDR(cdev->dev->id));
+}
+
+static int clps711x_getc(struct console_device *cdev)
+{
+ u16 data;
+
+ /* Wait until there is data in the FIFO */
+ while (readl(SYSFLG(cdev->dev->id)) & SYSFLG_URXFE) {
+ }
+
+ data = readw(UARTDR(cdev->dev->id));
+
+ /* Check for an error flag */
+ if (data & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR))
+ return -1;
+
+ return (int)data;
+}
+
+static int clps711x_tstc(struct console_device *cdev)
+{
+ return !(readl(SYSFLG(cdev->dev->id)) & SYSFLG_URXFE);
+}
+
+static int clps711x_probe(struct device_d *dev)
+{
+ struct console_device *cdev = xzalloc(sizeof(struct console_device));
+
+ dev->priv = clk_get(dev, NULL);
+ BUG_ON(!dev->priv);
+
+ cdev->dev = dev;
+ cdev->f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR;
+ cdev->tstc = clps711x_tstc;
+ cdev->putc = clps711x_putc;
+ cdev->getc = clps711x_getc;
+ cdev->setbrg = clps711x_setbaudrate;
+ clps711x_init_port(cdev);
+
+ return console_register(cdev);
+}
+
+static struct driver_d clps711x_driver = {
+ .name = "clps711x_serial",
+ .probe = clps711x_probe,
+};
+
+static int clps711x_init(void)
+{
+ return platform_driver_register(&clps711x_driver);
+}
+console_initcall(clps711x_init);
--
1.7.8.6
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