137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* MUSB OTG driver - support for Mentor's DMA controller
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*
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* Copyright 2005 Mentor Graphics Corporation
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* Copyright (C) 2005-2007 by Texas Instruments
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*/
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#ifndef CONFIG_BLACKFIN
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#define MUSB_HSDMA_BASE 0x200
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#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
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#define MUSB_HSDMA_CONTROL 0x4
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#define MUSB_HSDMA_ADDRESS 0x8
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#define MUSB_HSDMA_COUNT 0xc
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#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
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(MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
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#define musb_read_hsdma_addr(mbase, bchannel) \
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musb_readl(mbase, \
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS))
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#define musb_write_hsdma_addr(mbase, bchannel, addr) \
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musb_writel(mbase, \
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \
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addr)
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#define musb_read_hsdma_count(mbase, bchannel) \
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musb_readl(mbase, \
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT))
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#define musb_write_hsdma_count(mbase, bchannel, len) \
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musb_writel(mbase, \
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \
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len)
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#else
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#define MUSB_HSDMA_BASE 0x400
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#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
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#define MUSB_HSDMA_CONTROL 0x04
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#define MUSB_HSDMA_ADDR_LOW 0x08
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#define MUSB_HSDMA_ADDR_HIGH 0x0C
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#define MUSB_HSDMA_COUNT_LOW 0x10
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#define MUSB_HSDMA_COUNT_HIGH 0x14
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#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
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(MUSB_HSDMA_BASE + (_bchannel * 0x20) + _offset)
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static inline u32 musb_read_hsdma_addr(void __iomem *mbase, u8 bchannel)
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{
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u32 addr = musb_readw(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH));
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addr = addr << 16;
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addr |= musb_readw(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW));
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return addr;
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}
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static inline void musb_write_hsdma_addr(void __iomem *mbase,
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u8 bchannel, dma_addr_t dma_addr)
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{
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musb_writew(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW),
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dma_addr);
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musb_writew(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH),
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(dma_addr >> 16));
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}
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static inline u32 musb_read_hsdma_count(void __iomem *mbase, u8 bchannel)
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{
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u32 count = musb_readw(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH));
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count = count << 16;
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count |= musb_readw(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW));
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return count;
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}
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static inline void musb_write_hsdma_count(void __iomem *mbase,
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u8 bchannel, u32 len)
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{
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musb_writew(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW),len);
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musb_writew(mbase,
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MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH),
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(len >> 16));
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}
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#endif /* CONFIG_BLACKFIN */
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/* control register (16-bit): */
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#define MUSB_HSDMA_ENABLE_SHIFT 0
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#define MUSB_HSDMA_TRANSMIT_SHIFT 1
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#define MUSB_HSDMA_MODE1_SHIFT 2
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#define MUSB_HSDMA_IRQENABLE_SHIFT 3
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#define MUSB_HSDMA_ENDPOINT_SHIFT 4
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#define MUSB_HSDMA_BUSERROR_SHIFT 8
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#define MUSB_HSDMA_BURSTMODE_SHIFT 9
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#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT)
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#define MUSB_HSDMA_BURSTMODE_UNSPEC 0
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#define MUSB_HSDMA_BURSTMODE_INCR4 1
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#define MUSB_HSDMA_BURSTMODE_INCR8 2
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#define MUSB_HSDMA_BURSTMODE_INCR16 3
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#define MUSB_HSDMA_CHANNELS 8
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struct musb_dma_controller;
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struct musb_dma_channel {
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struct dma_channel channel;
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struct musb_dma_controller *controller;
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u32 start_addr;
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u32 len;
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u16 max_packet_sz;
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u8 idx;
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u8 epnum;
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u8 transmit;
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};
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struct musb_dma_controller {
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struct dma_controller controller;
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struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS];
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void *private_data;
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void __iomem *base;
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u8 channel_count;
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u8 used_channels;
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int irq;
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};
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