serial: mips: Implement CONFIG_SERIAL_MULTI into JZ serial driver

Implement support for CONFIG_SERIAL_MULTI into JZ 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 JZ 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: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>

2 files changed, 63 insertions, 6 deletions

diff --git a/arch/mips/cpu/xburst/jz_serial.c b/arch/mips/cpu/xburst/jz_serial.c
index e6c48e089..b1e1d276e 100644
--- a/arch/mips/cpu/xburst/jz_serial.c
+++ b/arch/mips/cpu/xburst/jz_serial.c
@@ -23,6 +23,8 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/jz4740.h>
+#include <serial.h>
+#include <linux/compiler.h>
 
 /*
  * serial_init - initialize a channel
@@ -35,7 +37,7 @@
  */
 struct jz4740_uart *uart = (struct jz4740_uart *)CONFIG_SYS_UART_BASE;
 
-int serial_init(void)
+static int jz_serial_init(void)
 {
 	/* Disable port interrupts while changing hardware */
 	writeb(0, &uart->dlhr_ier);
@@ -62,7 +64,7 @@ int serial_init(void)
 	return 0;
 }
 
-void serial_setbrg(void)
+static void jz_serial_setbrg(void)
 {
 	u32 baud_div, tmp;
 
@@ -79,7 +81,7 @@ void serial_setbrg(void)
 	writeb(tmp, &uart->lcr);
 }
 
-int serial_tstc(void)
+static int jz_serial_tstc(void)
 {
 	if (readb(&uart->lsr) & UART_LSR_DR)
 		return 1;
@@ -87,7 +89,7 @@ int serial_tstc(void)
 	return 0;
 }
 
-void serial_putc(const char c)
+static void jz_serial_putc(const char c)
 {
 	if (c == '\n')
 		serial_putc('\r');
@@ -99,7 +101,7 @@ void serial_putc(const char c)
 	writeb((u8)c, &uart->rbr_thr_dllr);
 }
 
-int serial_getc(void)
+static int jz_serial_getc(void)
 {
 	while (!serial_tstc())
 		;
@@ -107,8 +109,61 @@ int serial_getc(void)
 	return readb(&uart->rbr_thr_dllr);
 }
 
-void serial_puts(const char *s)
+static void jz_serial_puts(const char *s)
 {
 	while (*s)
 		serial_putc(*s++);
 }
+
+#ifdef CONFIG_SERIAL_MULTI
+static struct serial_device jz_serial_drv = {
+	.name	= "jz_serial",
+	.start	= jz_serial_init,
+	.stop	= NULL,
+	.setbrg	= jz_serial_setbrg,
+	.putc	= jz_serial_putc,
+	.puts	= jz_serial_puts,
+	.getc	= jz_serial_getc,
+	.tstc	= jz_serial_tstc,
+};
+
+void jz_serial_initialize(void)
+{
+	serial_register(&jz_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &jz_serial_drv;
+}
+#else
+int serial_init(void)
+{
+	return jz_serial_init();
+}
+
+void serial_setbrg(void)
+{
+	jz_serial_setbrg();
+}
+
+void serial_putc(const char c)
+{
+	jz_serial_putc(c);
+}
+
+void serial_puts(const char *s)
+{
+	jz_serial_puts(s);
+}
+
+int serial_getc(void)
+{
+	return jz_serial_getc();
+}
+
+int serial_tstc(void)
+{
+	return jz_serial_tstc();
+}
+#endif
diff --git a/common/serial.c b/common/serial.c
index a5996fe6c..7f5d45577 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -52,6 +52,7 @@ serial_initfunc(mpc512x_serial_initialize);
 serial_initfunc(uartlite_serial_initialize);
 serial_initfunc(au1x00_serial_initialize);
 serial_initfunc(asc_serial_initialize);
+serial_initfunc(jz_serial_initialize);
 
 void serial_register(struct serial_device *dev)
 {
@@ -82,6 +83,7 @@ void serial_initialize(void)
 	zynq_serial_initalize();
 	au1x00_serial_initialize();
 	asc_serial_initialize();
+	jz_serial_initialize();
 
 	serial_assign(default_serial_console()->name);
 }