commit cfba4573f6cc2a888ae7ceab6bba3c3dab04f3dd
author Marek Vasut <marex@denx.de> Thu Sep 13 16:50:30 2012 +0200
committer Tom Rini <trini@ti.com> Mon Oct 15 11:53:54 2012 -0700
tree 680076dc220ed1731d08552118c9cfc4d44fb05b
parent b207d6455b123b08ad8d2d29dec76c6cd6fee87a

serial: arm: Implement CONFIG_SERIAL_MULTI into atmel serial driver

Implement support for CONFIG_SERIAL_MULTI into atmel serial driver.
This driver was so far only usable directly, but this patch also adds
support for the multi method. This allows using more than one serial
driver alongside the atmel driver. Also, add a weak implementation
of default_serial_console() returning this driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
Cc: Xu, Hong <Hong.Xu@atmel.com>

common/serial.c

diff --git a/common/serial.c b/common/serial.c
index 71985fd..7b20306 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -72,6 +72,7 @@
 serial_initfunc(p3mx_serial_initialize);
 serial_initfunc(altera_jtag_serial_initialize);
 serial_initfunc(altera_serial_initialize);
+serial_initfunc(atmel_serial_initialize);
 
 void serial_register(struct serial_device *dev)
 {
@@ -122,6 +123,7 @@
 	p3mx_serial_initialize();
 	altera_jtag_serial_initialize();
 	altera_serial_initialize();
+	atmel_serial_initialize();
 
 	serial_assign(default_serial_console()->name);
 }

drivers/serial/atmel_usart.c

diff --git a/drivers/serial/atmel_usart.c b/drivers/serial/atmel_usart.c
index 943ef70..d49d5d4 100644
--- a/drivers/serial/atmel_usart.c
+++ b/drivers/serial/atmel_usart.c
@@ -20,6 +20,8 @@
  */
 #include <common.h>
 #include <watchdog.h>
+#include <serial.h>
+#include <linux/compiler.h>
 
 #include <asm/io.h>
 #include <asm/arch/clk.h>
@@ -29,7 +31,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-void serial_setbrg(void)
+static void atmel_serial_setbrg(void)
 {
 	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 	unsigned long divisor;
@@ -45,7 +47,7 @@
 	writel(USART3_BF(CD, divisor), &usart->brgr);
 }
 
-int serial_init(void)
+static int atmel_serial_init(void)
 {
 	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 
@@ -73,7 +75,7 @@
 	return 0;
 }
 
-void serial_putc(char c)
+static void atmel_serial_putc(char c)
 {
 	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 
@@ -84,13 +86,13 @@
 	writel(c, &usart->thr);
 }
 
-void serial_puts(const char *s)
+static void atmel_serial_puts(const char *s)
 {
 	while (*s)
 		serial_putc(*s++);
 }
 
-int serial_getc(void)
+static int atmel_serial_getc(void)
 {
 	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 
@@ -99,8 +101,61 @@
 	return readl(&usart->rhr);
 }
 
-int serial_tstc(void)
+static int atmel_serial_tstc(void)
 {
 	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 	return (readl(&usart->csr) & USART3_BIT(RXRDY)) != 0;
 }
+
+#ifdef CONFIG_SERIAL_MULTI
+static struct serial_device atmel_serial_drv = {
+	.name	= "atmel_serial",
+	.start	= atmel_serial_init,
+	.stop	= NULL,
+	.setbrg	= atmel_serial_setbrg,
+	.putc	= atmel_serial_putc,
+	.puts	= atmel_serial_puts,
+	.getc	= atmel_serial_getc,
+	.tstc	= atmel_serial_tstc,
+};
+
+void atmel_serial_initialize(void)
+{
+	serial_register(&atmel_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &atmel_serial_drv;
+}
+#else
+int serial_init(void)
+{
+	return atmel_serial_init();
+}
+
+void serial_setbrg(void)
+{
+	atmel_serial_setbrg();
+}
+
+void serial_putc(const char c)
+{
+	atmel_serial_putc(c);
+}
+
+void serial_puts(const char *s)
+{
+	atmel_serial_puts(s);
+}
+
+int serial_getc(void)
+{
+	return atmel_serial_getc();
+}
+
+int serial_tstc(void)
+{
+	return atmel_serial_tstc();
+}
+#endif