21b650c236
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Acked-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2007 by Analog Devices, Inc.
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*/
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#ifndef __MUSB_BLACKFIN_H__
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#define __MUSB_BLACKFIN_H__
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/*
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* Blackfin specific definitions
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*/
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/* Anomalies notes:
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*
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* 05000450 - USB DMA Mode 1 Short Packet Data Corruption:
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* MUSB driver is designed to transfer buffer of N * maxpacket size
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* in DMA mode 1 and leave the rest of the data to the next
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* transfer in DMA mode 0, so we never transmit a short packet in
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* DMA mode 1.
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*
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* 05000463 - This anomaly doesn't affect this driver since it
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* never uses L1 or L2 memory as data destination.
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*
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* 05000464 - This anomaly doesn't affect this driver since it
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* never uses L1 or L2 memory as data source.
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*
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* 05000465 - The anomaly can be seen when SCLK is over 100 MHz, and there is
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* no way to workaround for bulk endpoints. Since the wMaxPackSize
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* of bulk is less than or equal to 512, while the fifo size of
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* endpoint 5, 6, 7 is 1024, the double buffer mode is enabled
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* automatically when these endpoints are used for bulk OUT.
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*
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* 05000466 - This anomaly doesn't affect this driver since it never mixes
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* concurrent DMA and core accesses to the TX endpoint FIFOs.
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*
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* 05000467 - The workaround for this anomaly will introduce another
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* anomaly - 05000465.
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*/
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/* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be
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* unstable in host mode. This may be caused by Anomaly 05000380. After
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* digging out the root cause, we will change this number accordingly.
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* So, need to either use silicon v0.2+ or disable DMA mode in MUSB.
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*/
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#if ANOMALY_05000380 && defined(CONFIG_BF52x) && \
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!defined(CONFIG_MUSB_PIO_ONLY)
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# error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
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#endif
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#undef DUMP_FIFO_DATA
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#ifdef DUMP_FIFO_DATA
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static void dump_fifo_data(u8 *buf, u16 len)
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{
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u8 *tmp = buf;
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int i;
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for (i = 0; i < len; i++) {
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if (!(i % 16) && i)
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pr_debug("\n");
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pr_debug("%02x ", *tmp++);
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}
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pr_debug("\n");
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}
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#else
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#define dump_fifo_data(buf, len) do {} while (0)
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#endif
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#define USB_DMA_BASE USB_DMA_INTERRUPT
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#define USB_DMAx_CTRL 0x04
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#define USB_DMAx_ADDR_LOW 0x08
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#define USB_DMAx_ADDR_HIGH 0x0C
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#define USB_DMAx_COUNT_LOW 0x10
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#define USB_DMAx_COUNT_HIGH 0x14
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#define USB_DMA_REG(ep, reg) (USB_DMA_BASE + 0x20 * ep + reg)
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/* Almost 1 second */
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#define TIMER_DELAY (1 * HZ)
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#endif /* __MUSB_BLACKFIN_H__ */
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