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path: root/drivers/staging/media/solo6x10/solo6x10-gpio.c
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Diffstat (limited to 'drivers/staging/media/solo6x10/solo6x10-gpio.c')
-rw-r--r--drivers/staging/media/solo6x10/solo6x10-gpio.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/staging/media/solo6x10/solo6x10-gpio.c b/drivers/staging/media/solo6x10/solo6x10-gpio.c
new file mode 100644
index 00000000000..73276dc9287
--- /dev/null
+++ b/drivers/staging/media/solo6x10/solo6x10-gpio.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
+ *
+ * Original author:
+ * Ben Collins <bcollins@ubuntu.com>
+ *
+ * Additional work by:
+ * John Brooks <john.brooks@bluecherry.net>
+ *
+ * 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 <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+
+#include "solo6x10.h"
+
+static void solo_gpio_mode(struct solo_dev *solo_dev,
+ unsigned int port_mask, unsigned int mode)
+{
+ int port;
+ unsigned int ret;
+
+ ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
+
+ /* To set gpio */
+ for (port = 0; port < 16; port++) {
+ if (!((1 << port) & port_mask))
+ continue;
+
+ ret &= (~(3 << (port << 1)));
+ ret |= ((mode & 3) << (port << 1));
+ }
+
+ solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret);
+
+ /* To set extended gpio - sensor */
+ ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
+
+ for (port = 0; port < 16; port++) {
+ if (!((1 << (port + 16)) & port_mask))
+ continue;
+
+ if (!mode)
+ ret &= ~(1 << port);
+ else
+ ret |= 1 << port;
+ }
+
+ solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
+}
+
+static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value)
+{
+ solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
+ solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value);
+}
+
+static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value)
+{
+ solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
+ solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value);
+}
+
+static void solo_gpio_config(struct solo_dev *solo_dev)
+{
+ /* Video reset */
+ solo_gpio_mode(solo_dev, 0x30, 1);
+ solo_gpio_clear(solo_dev, 0x30);
+ udelay(100);
+ solo_gpio_set(solo_dev, 0x30);
+ udelay(100);
+
+ /* Warning: Don't touch the next line unless you're sure of what
+ * you're doing: first four gpio [0-3] are used for video. */
+ solo_gpio_mode(solo_dev, 0x0f, 2);
+
+ /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */
+ solo_gpio_mode(solo_dev, 0xff00, 1);
+
+ /* Initially set relay status to 0 */
+ solo_gpio_clear(solo_dev, 0xff00);
+}
+
+int solo_gpio_init(struct solo_dev *solo_dev)
+{
+ solo_gpio_config(solo_dev);
+ return 0;
+}
+
+void solo_gpio_exit(struct solo_dev *solo_dev)
+{
+ solo_gpio_clear(solo_dev, 0x30);
+ solo_gpio_config(solo_dev);
+}