1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/usb/host/whci/hw.c b/drivers/usb/host/whci/hw.c
new file mode 100644
index 000000000000..22d38f23c3f0
--- /dev/null
+++ b/drivers/usb/host/whci/hw.c
@@ -0,0 +1,80 @@
+/*
+ * Wireless Host Controller (WHC) hardware access helpers.
+ *
+ * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include <linux/uwb/umc.h>
+
+#include "../../wusbcore/wusbhc.h"
+
+#include "whcd.h"
+
+void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val)
+{
+	unsigned long flags;
+	u32 cmd;
+
+	spin_lock_irqsave(&whc->lock, flags);
+
+	cmd = le_readl(whc->base + WUSBCMD);
+	cmd = (cmd & ~mask) | val;
+	le_writel(cmd, whc->base + WUSBCMD);
+
+	spin_unlock_irqrestore(&whc->lock, flags);
+}
+
+int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len)
+{
+	unsigned long flags;
+	dma_addr_t dma_addr;
+	int t, ret = 0;
+
+	if (addr)
+		dma_addr = dma_map_single(&whc->umc->dev, addr, len, DMA_TO_DEVICE);
+	else
+		dma_addr = 0;
+
+	mutex_lock(&whc->mutex);
+
+	/* poke registers to start cmd */
+	spin_lock_irqsave(&whc->lock, flags);
+
+	le_writel(params, whc->base + WUSBGENCMDPARAMS);
+	le_writeq(dma_addr, whc->base + WUSBGENADDR);
+
+	le_writel(WUSBGENCMDSTS_ACTIVE | WUSBGENCMDSTS_IOC | cmd,
+		  whc->base + WUSBGENCMDSTS);
+
+	spin_unlock_irqrestore(&whc->lock, flags);
+
+	/* wait for command to complete */
+	t = wait_event_timeout(whc->cmd_wq,
+			       (le_readl(whc->base + WUSBGENCMDSTS) & WUSBGENCMDSTS_ACTIVE) == 0,
+			       WHC_GENCMD_TIMEOUT_MS);
+	if (t == 0) {
+		ret = -ETIMEDOUT;
+		dev_err(&whc->umc->dev, "generic command timeout (%04x/%04x)\n",
+			cmd, params);
+	}
+
+	mutex_unlock(&whc->mutex);
+
+	if (addr)
+		dma_unmap_single(&whc->umc->dev, dma_addr, len, DMA_TO_DEVICE);
+
+	return ret;
+}