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Diffstat (limited to 'kernel/drivers/usb/musb/blackfin.h')
| -rw-r--r-- | kernel/drivers/usb/musb/blackfin.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/kernel/drivers/usb/musb/blackfin.h b/kernel/drivers/usb/musb/blackfin.h new file mode 100644 index 000000000..c84dae546 --- /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__ */ |