1 files changed, 93 insertions, 0 deletions

diff --git a/drivers/video/fbdev/via/via_aux.h b/drivers/video/fbdev/via/via_aux.h
new file mode 100644
index 000000000000..a8de3f038cea
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ *
+ * 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, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; 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.
+ */
+/*
+ * infrastructure for devices connected via I2C
+ */
+
+#ifndef __VIA_AUX_H__
+#define __VIA_AUX_H__
+
+
+#include <linux/list.h>
+#include <linux/i2c.h>
+#include <linux/fb.h>
+
+
+struct via_aux_bus {
+        struct i2c_adapter *adap;       /* the I2C device to access the bus */
+        struct list_head drivers;       /* drivers for devices on this bus */
+};
+
+struct via_aux_drv {
+        struct list_head chain;         /* chain to support multiple drivers */
+
+        struct via_aux_bus *bus;        /* the I2C bus used */
+        u8 addr;                        /* the I2C slave address */
+
+        const char *name;       /* human readable name of the driver */
+        void *data;             /* private data of this driver */
+
+        void (*cleanup)(struct via_aux_drv *drv);
+        const struct fb_videomode* (*get_preferred_mode)
+                (struct via_aux_drv *drv);
+};
+
+
+struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap);
+void via_aux_free(struct via_aux_bus *bus);
+const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus);
+
+
+static inline bool via_aux_add(struct via_aux_drv *drv)
+{
+        struct via_aux_drv *data = kmalloc(sizeof(*data), GFP_KERNEL);
+
+        if (!data)
+                return false;
+
+        *data = *drv;
+        list_add_tail(&data->chain, &data->bus->drivers);
+        return true;
+}
+
+static inline bool via_aux_read(struct via_aux_drv *drv, u8 start, u8 *buf,
+        u8 len)
+{
+        struct i2c_msg msg[2] = {
+                {.addr = drv->addr, .flags = 0, .len = 1, .buf = &start},
+                {.addr = drv->addr, .flags = I2C_M_RD, .len = len, .buf = buf} };
+
+        return i2c_transfer(drv->bus->adap, msg, 2) == 2;
+}
+
+
+/* probe functions of existing drivers - should only be called in via_aux.c */
+void via_aux_ch7301_probe(struct via_aux_bus *bus);
+void via_aux_edid_probe(struct via_aux_bus *bus);
+void via_aux_sii164_probe(struct via_aux_bus *bus);
+void via_aux_vt1636_probe(struct via_aux_bus *bus);
+void via_aux_vt1632_probe(struct via_aux_bus *bus);
+void via_aux_vt1631_probe(struct via_aux_bus *bus);
+void via_aux_vt1625_probe(struct via_aux_bus *bus);
+void via_aux_vt1622_probe(struct via_aux_bus *bus);
+void via_aux_vt1621_probe(struct via_aux_bus *bus);
+
+
+#endif /* __VIA_AUX_H__ */