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path: root/drivers/net/wireless/ti/wl18xx/io.c
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Diffstat (limited to 'drivers/net/wireless/ti/wl18xx/io.c')
-rw-r--r--drivers/net/wireless/ti/wl18xx/io.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/net/wireless/ti/wl18xx/io.c b/drivers/net/wireless/ti/wl18xx/io.c
new file mode 100644
index 0000000..ce61b4b
--- /dev/null
+++ b/drivers/net/wireless/ti/wl18xx/io.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This file is part of wl18xx
+ *
+ * Copyright (C) 2011 Texas Instruments
+ */
+
+#include "../wlcore/wlcore.h"
+#include "../wlcore/io.h"
+
+#include "io.h"
+
+int wl18xx_top_reg_write(struct wl1271 *wl, int addr, u16 val)
+{
+ u32 tmp;
+ int ret;
+
+ if (WARN_ON(addr % 2))
+ return -EINVAL;
+
+ if ((addr % 4) == 0) {
+ ret = wlcore_read32(wl, addr, &tmp);
+ if (ret < 0)
+ goto out;
+
+ tmp = (tmp & 0xffff0000) | val;
+ ret = wlcore_write32(wl, addr, tmp);
+ } else {
+ ret = wlcore_read32(wl, addr - 2, &tmp);
+ if (ret < 0)
+ goto out;
+
+ tmp = (tmp & 0xffff) | (val << 16);
+ ret = wlcore_write32(wl, addr - 2, tmp);
+ }
+
+out:
+ return ret;
+}
+
+int wl18xx_top_reg_read(struct wl1271 *wl, int addr, u16 *out)
+{
+ u32 val = 0;
+ int ret;
+
+ if (WARN_ON(addr % 2))
+ return -EINVAL;
+
+ if ((addr % 4) == 0) {
+ /* address is 4-bytes aligned */
+ ret = wlcore_read32(wl, addr, &val);
+ if (ret >= 0 && out)
+ *out = val & 0xffff;
+ } else {
+ ret = wlcore_read32(wl, addr - 2, &val);
+ if (ret >= 0 && out)
+ *out = (val & 0xffff0000) >> 16;
+ }
+
+ return ret;
+}