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path: root/drivers/media/video/cx18/cx18-gpio.c
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Diffstat (limited to 'drivers/media/video/cx18/cx18-gpio.c')
-rw-r--r--drivers/media/video/cx18/cx18-gpio.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c
new file mode 100644
index 00000000000..19253e6b867
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-gpio.c
@@ -0,0 +1,74 @@
+/*
+ * cx18 gpio functions
+ *
+ * Derived from ivtv-gpio.c
+ *
+ * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ */
+
+#include "cx18-driver.h"
+#include "cx18-cards.h"
+#include "cx18-gpio.h"
+#include "tuner-xc2028.h"
+
+/********************* GPIO stuffs *********************/
+
+/* GPIO registers */
+#define CX18_REG_GPIO_IN 0xc72010
+#define CX18_REG_GPIO_OUT1 0xc78100
+#define CX18_REG_GPIO_DIR1 0xc78108
+#define CX18_REG_GPIO_OUT2 0xc78104
+#define CX18_REG_GPIO_DIR2 0xc7810c
+
+/*
+ * HVR-1600 GPIO pins, courtesy of Hauppauge:
+ *
+ * gpio0: zilog ir process reset pin
+ * gpio1: zilog programming pin (you should never use this)
+ * gpio12: cx24227 reset pin
+ * gpio13: cs5345 reset pin
+*/
+
+void cx18_gpio_init(struct cx18 *cx)
+{
+ if (cx->card->gpio_init.direction == 0)
+ return;
+
+ CX18_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
+ read_reg(CX18_REG_GPIO_DIR1), read_reg(CX18_REG_GPIO_OUT1));
+
+ /* init output data then direction */
+ write_reg(cx->card->gpio_init.direction << 16, CX18_REG_GPIO_DIR1);
+ write_reg(0, CX18_REG_GPIO_DIR2);
+ write_reg((cx->card->gpio_init.direction << 16) |
+ cx->card->gpio_init.initial_value, CX18_REG_GPIO_OUT1);
+ write_reg(0, CX18_REG_GPIO_OUT2);
+}
+
+/* Xceive tuner reset function */
+int cx18_reset_tuner_gpio(void *dev, int cmd, int value)
+{
+ struct i2c_algo_bit_data *algo = dev;
+ struct cx18 *cx = algo->data;
+/* int curdir, curout;*/
+
+ if (cmd != XC2028_TUNER_RESET)
+ return 0;
+ CX18_DEBUG_INFO("Resetting tuner\n");
+ return 0;
+}