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authorMarek Vasut <marex@denx.de>2012-09-13 16:48:50 +0200
committerTom Rini <trini@ti.com>2012-10-15 11:53:54 -0700
commit8c085757498281aed461979518401179d3e9942f (patch)
tree5e258888503f5eb81afa7f987bbd0ea8656ae742 /drivers/serial
parent088a4f3cdfcf5f194768f6fc54c96d01ba128d50 (diff)
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serial: arm: Implement CONFIG_SERIAL_MULTI into altera_jtag serial driver
Implement support for CONFIG_SERIAL_MULTI into altera_jtag 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 altera_jtag 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: Thomas Chou <thomas@wytron.com.tw>
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/altera_jtag_uart.c73
1 files changed, 67 insertions, 6 deletions
diff --git a/drivers/serial/altera_jtag_uart.c b/drivers/serial/altera_jtag_uart.c
index 2980e4d..8cb4606 100644
--- a/drivers/serial/altera_jtag_uart.c
+++ b/drivers/serial/altera_jtag_uart.c
@@ -25,6 +25,8 @@
#include <watchdog.h>
#include <asm/io.h>
#include <nios2-io.h>
+#include <linux/compiler.h>
+#include <serial.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -33,10 +35,16 @@ DECLARE_GLOBAL_DATA_PTR;
*-----------------------------------------------------------------*/
static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE;
-void serial_setbrg( void ){ return; }
-int serial_init( void ) { return(0);}
+static void altera_jtag_serial_setbrg(void)
+{
+}
+
+static int altera_jtag_serial_init(void)
+{
+ return 0;
+}
-void serial_putc (char c)
+static void altera_jtag_serial_putc(char c)
{
while (1) {
unsigned st = readl(&jtag->control);
@@ -51,18 +59,18 @@ void serial_putc (char c)
writel ((unsigned char)c, &jtag->data);
}
-void serial_puts (const char *s)
+static void altera_jtag_serial_puts(const char *s)
{
while (*s != 0)
serial_putc (*s++);
}
-int serial_tstc (void)
+static int altera_jtag_serial_tstc(void)
{
return ( readl (&jtag->control) & NIOS_JTAG_RRDY);
}
-int serial_getc (void)
+static int altera_jtag_serial_getc(void)
{
int c;
unsigned val;
@@ -76,3 +84,56 @@ int serial_getc (void)
c = val & 0x0ff;
return (c);
}
+
+#ifdef CONFIG_SERIAL_MULTI
+static struct serial_device altera_jtag_serial_drv = {
+ .name = "altera_jtag_uart",
+ .start = altera_jtag_serial_init,
+ .stop = NULL,
+ .setbrg = altera_jtag_serial_setbrg,
+ .putc = altera_jtag_serial_putc,
+ .puts = altera_jtag_serial_puts,
+ .getc = altera_jtag_serial_getc,
+ .tstc = altera_jtag_serial_tstc,
+};
+
+void altera_jtag_serial_initialize(void)
+{
+ serial_register(&altera_jtag_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+ return &altera_jtag_serial_drv;
+}
+#else
+int serial_init(void)
+{
+ return altera_jtag_serial_init();
+}
+
+void serial_setbrg(void)
+{
+ altera_jtag_serial_setbrg();
+}
+
+void serial_putc(const char c)
+{
+ altera_jtag_serial_putc(c);
+}
+
+void serial_puts(const char *s)
+{
+ altera_jtag_serial_puts(s);
+}
+
+int serial_getc(void)
+{
+ return altera_jtag_serial_getc();
+}
+
+int serial_tstc(void)
+{
+ return altera_jtag_serial_tstc();
+}
+#endif