wl18xx: read clock frequency and do top init accordingly

Instead of using hardcoded values for a single frequency, we need to
read the frequency and use the appropriate values for it in the top
initialization.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>

drivers/net/wireless/ti/wl18xx/io.c

@@ -0,0 +1,60 @@
+/*
+ * This file is part of wl18xx
+ *
+ * Copyright (C) 2011 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include "../wlcore/wlcore.h"
+#include "../wlcore/io.h"
+
+#include "io.h"
+
+void wl18xx_top_reg_write(struct wl1271 *wl, int addr, u16 val)
+{
+	u32 tmp;
+
+	if (WARN_ON(addr % 2))
+		return;
+
+	if ((addr % 4) == 0) {
+		tmp = wl1271_read32(wl, addr);
+		tmp = (tmp & 0xffff0000) | val;
+		wl1271_write32(wl, addr, tmp);
+	} else {
+		tmp = wl1271_read32(wl, addr - 2);
+		tmp = (tmp & 0xffff) | (val << 16);
+		wl1271_write32(wl, addr - 2, tmp);
+	}
+}
+
+u16 wl18xx_top_reg_read(struct wl1271 *wl, int addr)
+{
+	u32 val;
+
+	if (WARN_ON(addr % 2))
+		return 0;
+
+	if ((addr % 4) == 0) {
+		/* address is 4-bytes aligned */
+		val = wl1271_read32(wl, addr);
+		return val & 0xffff;
+	} else {
+		val = wl1271_read32(wl, addr - 2);
+		return (val & 0xffff0000) >> 16;
+	}
+}