1 files changed, 77 insertions, 0 deletions

diff --git a/firmware/drivers/synaptics-rmi.c b/firmware/drivers/synaptics-rmi.c
new file mode 100644
index 0000000000..c6a1bae168
--- /dev/null
+++ b/firmware/drivers/synaptics-rmi.c
@@ -0,0 +1,77 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by Amaury Pouly
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "system.h"
+#include "generic_i2c.h"
+#include "synaptics-rmi.h"
+
+static int rmi_cur_page;
+static int rmi_i2c_addr;
+static int rmi_i2c_bus;
+
+/* NOTE:
+ * RMI over i2c supports some special aliases on page 0x2 but this driver don't
+ * use them */
+
+int rmi_init(int i2c_bus_index, int i2c_dev_addr)
+{
+    rmi_i2c_bus = i2c_bus_index;
+    rmi_i2c_addr = i2c_dev_addr;
+    rmi_cur_page = 0x4;
+    return 0;
+}
+
+static int rmi_select_page(unsigned char page)
+{
+    /* Lazy page select */
+    if(page != rmi_cur_page)
+    {
+        rmi_cur_page = page;
+        return i2c_write_data(rmi_i2c_bus, rmi_i2c_addr, RMI_PAGE_SELECT, &page, 1);
+    }
+    else
+        return 0;
+}
+
+int rmi_read(int address, int byte_count, unsigned char *buffer)
+{
+    if(rmi_select_page(address >> 8) < 0)
+        return -1;
+    return i2c_read_data(rmi_i2c_bus, rmi_i2c_addr, address & 0xff, buffer, byte_count);
+}
+
+int rmi_read_single(int address)
+{
+    unsigned char c;
+    int ret = rmi_read(address, 1, &c);
+    return ret < 0 ? ret : c;
+}
+
+int rmi_write(int address, int byte_count, const unsigned char *buffer)
+{
+    if(rmi_select_page(address >> 8) < 0)
+        return -1;
+    return i2c_write_data(rmi_i2c_bus, rmi_i2c_addr, address & 0xff, buffer, byte_count);
+}
+
+int rmi_write_single(int address, unsigned char byte)
+{
+    return rmi_write(address, 1, &byte);
+}