Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / musb / blackfin.h

diff --git a/kernel/drivers/usb/musb/blackfin.h b/kernel/drivers/usb/musb/blackfin.h
new file mode 100644 (file)
index 0000000..c84dae5
--- /dev/null
+++ b/kernel/drivers/usb/musb/blackfin.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2007 by Analog Devices, Inc.
+ *
+ * The Inventra Controller Driver for Linux 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.
+ */
+
+#ifndef __MUSB_BLACKFIN_H__
+#define __MUSB_BLACKFIN_H__
+
+/*
+ * Blackfin specific definitions
+ */
+
+/* Anomalies notes:
+ *
+ *  05000450 - USB DMA Mode 1 Short Packet Data Corruption:
+ *             MUSB driver is designed to transfer buffer of N * maxpacket size
+ *             in DMA mode 1 and leave the rest of the data to the next
+ *             transfer in DMA mode 0, so we never transmit a short packet in
+ *             DMA mode 1.
+ *
+ *  05000463 - This anomaly doesn't affect this driver since it
+ *             never uses L1 or L2 memory as data destination.
+ *
+ *  05000464 - This anomaly doesn't affect this driver since it
+ *             never uses L1 or L2 memory as data source.
+ *
+ *  05000465 - The anomaly can be seen when SCLK is over 100 MHz, and there is
+ *             no way to workaround for bulk endpoints.  Since the wMaxPackSize
+ *             of bulk is less than or equal to 512, while the fifo size of
+ *             endpoint 5, 6, 7 is 1024, the double buffer mode is enabled
+ *             automatically when these endpoints are used for bulk OUT.
+ *
+ *  05000466 - This anomaly doesn't affect this driver since it never mixes
+ *             concurrent DMA and core accesses to the TX endpoint FIFOs.
+ *
+ *  05000467 - The workaround for this anomaly will introduce another
+ *             anomaly - 05000465.
+ */
+
+/* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be
+ * unstable in host mode.  This may be caused by Anomaly 05000380.  After
+ * digging out the root cause, we will change this number accordingly.
+ * So, need to either use silicon v0.2+ or disable DMA mode in MUSB.
+ */
+#if ANOMALY_05000380 && defined(CONFIG_BF52x) && \
+       !defined(CONFIG_MUSB_PIO_ONLY)
+# error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
+#endif
+
+#undef DUMP_FIFO_DATA
+#ifdef DUMP_FIFO_DATA
+static void dump_fifo_data(u8 *buf, u16 len)
+{
+       u8 *tmp = buf;
+       int i;
+
+       for (i = 0; i < len; i++) {
+               if (!(i % 16) && i)
+                       pr_debug("\n");
+               pr_debug("%02x ", *tmp++);
+       }
+       pr_debug("\n");
+}
+#else
+#define dump_fifo_data(buf, len)       do {} while (0)
+#endif
+
+
+#define USB_DMA_BASE           USB_DMA_INTERRUPT
+#define USB_DMAx_CTRL          0x04
+#define USB_DMAx_ADDR_LOW      0x08
+#define USB_DMAx_ADDR_HIGH     0x0C
+#define USB_DMAx_COUNT_LOW     0x10
+#define USB_DMAx_COUNT_HIGH    0x14
+
+#define USB_DMA_REG(ep, reg)   (USB_DMA_BASE + 0x20 * ep + reg)
+
+/* Almost 1 second */
+#define TIMER_DELAY    (1 * HZ)
+
+static struct timer_list musb_conn_timer;
+
+#endif /* __MUSB_BLACKFIN_H__ */