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authorMagnus Damm <damm@opensource.se>2009-11-27 09:28:03 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-11-30 12:02:55 +0900
commite6d8460aca6311d7ab5371b59dc999bb4d714444 (patch)
treef06e509b47d6b02f4b0ef362491c887bca8d69ae /arch/sh/boards
parentfae4339919c741f89f7e293b8c646207e1df28e1 (diff)
sh: Improve kfr2r09 serial port setup code
This patch improves the serial port communication quality of port YC401 on the KFR2R09 board. With this fix serial console is fine at 115200 - up and down keys now work as expected. Thanks to Hirohide Yamasaki for this fix. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boards')
-rw-r--r--arch/sh/boards/mach-kfr2r09/setup.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index e755bad6dc1..87438d6603d 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -414,11 +414,59 @@ static int kfr2r09_usb0_gadget_i2c_setup(void)
return 0;
}
+
+static int kfr2r09_serial_i2c_setup(void)
+{
+ struct i2c_adapter *a;
+ struct i2c_msg msg;
+ unsigned char buf[2];
+ int ret;
+
+ a = i2c_get_adapter(0);
+ if (!a)
+ return -ENODEV;
+
+ /* set bit 6 (the 7th bit) of chip at 0x09, register 0x13 */
+ buf[0] = 0x13;
+ msg.addr = 0x09;
+ msg.buf = buf;
+ msg.len = 1;
+ msg.flags = 0;
+ ret = i2c_transfer(a, &msg, 1);
+ if (ret != 1)
+ return -ENODEV;
+
+ buf[0] = 0;
+ msg.addr = 0x09;
+ msg.buf = buf;
+ msg.len = 1;
+ msg.flags = I2C_M_RD;
+ ret = i2c_transfer(a, &msg, 1);
+ if (ret != 1)
+ return -ENODEV;
+
+ buf[1] = buf[0] | (1 << 6);
+ buf[0] = 0x13;
+ msg.addr = 0x09;
+ msg.buf = buf;
+ msg.len = 2;
+ msg.flags = 0;
+ ret = i2c_transfer(a, &msg, 1);
+ if (ret != 1)
+ return -ENODEV;
+
+ return 0;
+}
#else
static int kfr2r09_usb0_gadget_i2c_setup(void)
{
return -ENODEV;
}
+
+static int kfr2r09_serial_i2c_setup(void)
+{
+ return -ENODEV;
+}
#endif
static int kfr2r09_usb0_gadget_setup(void)
@@ -463,6 +511,9 @@ static int __init kfr2r09_devices_setup(void)
/* enable SCIF1 serial port for YC401 console support */
gpio_request(GPIO_FN_SCIF1_RXD, NULL);
gpio_request(GPIO_FN_SCIF1_TXD, NULL);
+ kfr2r09_serial_i2c_setup(); /* ECONTMSK(bit6=L10ONEN) set 1 */
+ gpio_request(GPIO_PTG3, NULL); /* HPON_ON */
+ gpio_direction_output(GPIO_PTG3, 1); /* HPON_ON = H */
/* setup NOR flash at CS0 */
ctrl_outl(0x36db0400, BSC_CS0BCR);