1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/media/video/cx25821/cx25821-gpio.c b/drivers/media/video/cx25821/cx25821-gpio.c
new file mode 100644
index 00000000000..29e43b03c85
--- /dev/null
+++ b/drivers/media/video/cx25821/cx25821-gpio.c
@@ -0,0 +1,98 @@
+/*
+ *  Driver for the Conexant CX25821 PCIe bridge
+ *
+ *  Copyright (C) 2009 Conexant Systems Inc.
+ *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "cx25821.h"
+
+/********************* GPIO stuffs *********************/
+void cx25821_set_gpiopin_direction(struct cx25821_dev *dev,
+				   int pin_number, int pin_logic_value)
+{
+	int bit = pin_number;
+	u32 gpio_oe_reg = GPIO_LO_OE;
+	u32 gpio_register = 0;
+	u32 value = 0;
+
+	/* Check for valid pinNumber */
+	if (pin_number >= 47)
+		return;
+
+	if (pin_number > 31) {
+		bit = pin_number - 31;
+		gpio_oe_reg = GPIO_HI_OE;
+	}
+	/* Here we will make sure that the GPIOs 0 and 1 are output. keep the
+	 * rest as is */
+	gpio_register = cx_read(gpio_oe_reg);
+
+	if (pin_logic_value == 1)
+		value = gpio_register | Set_GPIO_Bit(bit);
+	else
+		value = gpio_register & Clear_GPIO_Bit(bit);
+
+	cx_write(gpio_oe_reg, value);
+}
+EXPORT_SYMBOL(cx25821_set_gpiopin_direction);
+
+static void cx25821_set_gpiopin_logicvalue(struct cx25821_dev *dev,
+					   int pin_number, int pin_logic_value)
+{
+	int bit = pin_number;
+	u32 gpio_reg = GPIO_LO;
+	u32 value = 0;
+
+	/* Check for valid pinNumber */
+	if (pin_number >= 47)
+		return;
+
+	/* change to output direction */
+	cx25821_set_gpiopin_direction(dev, pin_number, 0);
+
+	if (pin_number > 31) {
+		bit = pin_number - 31;
+		gpio_reg = GPIO_HI;
+	}
+
+	value = cx_read(gpio_reg);
+
+	if (pin_logic_value == 0)
+		value &= Clear_GPIO_Bit(bit);
+	else
+		value |= Set_GPIO_Bit(bit);
+
+	cx_write(gpio_reg, value);
+}
+
+void cx25821_gpio_init(struct cx25821_dev *dev)
+{
+	if (dev == NULL)
+		return;
+
+	switch (dev->board) {
+	case CX25821_BOARD_CONEXANT_ATHENA10:
+	default:
+		/* set GPIO 5 to select the path for Medusa/Athena */
+		cx25821_set_gpiopin_logicvalue(dev, 5, 1);
+		mdelay(20);
+		break;
+	}
+
+}