1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/staging/solo6x10/gpio.c b/drivers/staging/solo6x10/gpio.c
new file mode 100644
index 00000000000..0925e6f33a9
--- /dev/null
+++ b/drivers/staging/solo6x10/gpio.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
+ * Copyright (C) 2010 Ben Collins <bcollins@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 <asm/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);
+}