318 lines
14 KiB
C
318 lines
14 KiB
C
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* hpc3.h: Definitions for SGI HPC3 controller
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*
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* Copyright (C) 1996 David S. Miller
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* Copyright (C) 1998 Ralf Baechle
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*/
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#ifndef _SGI_HPC3_H
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#define _SGI_HPC3_H
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#include <linux/types.h>
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#include <asm/page.h>
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/* An HPC DMA descriptor. */
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struct hpc_dma_desc {
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u32 pbuf; /* physical address of data buffer */
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u32 cntinfo; /* counter and info bits */
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#define HPCDMA_EOX 0x80000000 /* last desc in chain for tx */
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#define HPCDMA_EOR 0x80000000 /* last desc in chain for rx */
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#define HPCDMA_EOXP 0x40000000 /* end of packet for tx */
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#define HPCDMA_EORP 0x40000000 /* end of packet for rx */
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#define HPCDMA_XIE 0x20000000 /* irq generated when at end of this desc */
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#define HPCDMA_XIU 0x01000000 /* Tx buffer in use by CPU. */
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#define HPCDMA_EIPC 0x00ff0000 /* SEEQ ethernet special xternal bytecount */
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#define HPCDMA_ETXD 0x00008000 /* set to one by HPC when packet tx'd */
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#define HPCDMA_OWN 0x00004000 /* Denotes ring buffer ownership on rx */
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#define HPCDMA_BCNT 0x00003fff /* size in bytes of this dma buffer */
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u32 pnext; /* paddr of next hpc_dma_desc if any */
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};
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/* The set of regs for each HPC3 PBUS DMA channel. */
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struct hpc3_pbus_dmacregs {
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volatile u32 pbdma_bptr; /* pbus dma channel buffer ptr */
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volatile u32 pbdma_dptr; /* pbus dma channel desc ptr */
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u32 _unused0[0x1000/4 - 2]; /* padding */
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volatile u32 pbdma_ctrl; /* pbus dma channel control register has
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* completely different meaning for read
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* compared with write */
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/* read */
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#define HPC3_PDMACTRL_INT 0x00000001 /* interrupt (cleared after read) */
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#define HPC3_PDMACTRL_ISACT 0x00000002 /* channel active */
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/* write */
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#define HPC3_PDMACTRL_SEL 0x00000002 /* little endian transfer */
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#define HPC3_PDMACTRL_RCV 0x00000004 /* direction is receive */
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#define HPC3_PDMACTRL_FLSH 0x00000008 /* enable flush for receive DMA */
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#define HPC3_PDMACTRL_ACT 0x00000010 /* start dma transfer */
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#define HPC3_PDMACTRL_LD 0x00000020 /* load enable for ACT */
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#define HPC3_PDMACTRL_RT 0x00000040 /* Use realtime GIO bus servicing */
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#define HPC3_PDMACTRL_HW 0x0000ff00 /* DMA High-water mark */
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#define HPC3_PDMACTRL_FB 0x003f0000 /* Ptr to beginning of fifo */
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#define HPC3_PDMACTRL_FE 0x3f000000 /* Ptr to end of fifo */
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u32 _unused1[0x1000/4 - 1]; /* padding */
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};
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/* The HPC3 SCSI registers, this does not include external ones. */
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struct hpc3_scsiregs {
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volatile u32 cbptr; /* current dma buffer ptr, diagnostic use only */
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volatile u32 ndptr; /* next dma descriptor ptr */
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u32 _unused0[0x1000/4 - 2]; /* padding */
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volatile u32 bcd; /* byte count info */
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#define HPC3_SBCD_BCNTMSK 0x00003fff /* bytes to transfer from/to memory */
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#define HPC3_SBCD_XIE 0x00004000 /* Send IRQ when done with cur buf */
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#define HPC3_SBCD_EOX 0x00008000 /* Indicates this is last buf in chain */
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volatile u32 ctrl; /* control register */
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#define HPC3_SCTRL_IRQ 0x01 /* IRQ asserted, either dma done or parity */
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#define HPC3_SCTRL_ENDIAN 0x02 /* DMA endian mode, 0=big 1=little */
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#define HPC3_SCTRL_DIR 0x04 /* DMA direction, 1=dev2mem 0=mem2dev */
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#define HPC3_SCTRL_FLUSH 0x08 /* Tells HPC3 to flush scsi fifos */
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#define HPC3_SCTRL_ACTIVE 0x10 /* SCSI DMA channel is active */
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#define HPC3_SCTRL_AMASK 0x20 /* DMA active inhibits PIO */
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#define HPC3_SCTRL_CRESET 0x40 /* Resets dma channel and external controller */
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#define HPC3_SCTRL_PERR 0x80 /* Bad parity on HPC3 iface to scsi controller */
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volatile u32 gfptr; /* current GIO fifo ptr */
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volatile u32 dfptr; /* current device fifo ptr */
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volatile u32 dconfig; /* DMA configuration register */
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#define HPC3_SDCFG_HCLK 0x00001 /* Enable DMA half clock mode */
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#define HPC3_SDCFG_D1 0x00006 /* Cycles to spend in D1 state */
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#define HPC3_SDCFG_D2 0x00038 /* Cycles to spend in D2 state */
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#define HPC3_SDCFG_D3 0x001c0 /* Cycles to spend in D3 state */
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#define HPC3_SDCFG_HWAT 0x00e00 /* DMA high water mark */
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#define HPC3_SDCFG_HW 0x01000 /* Enable 16-bit halfword DMA accesses to scsi */
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#define HPC3_SDCFG_SWAP 0x02000 /* Byte swap all DMA accesses */
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#define HPC3_SDCFG_EPAR 0x04000 /* Enable parity checking for DMA */
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#define HPC3_SDCFG_POLL 0x08000 /* hd_dreq polarity control */
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#define HPC3_SDCFG_ERLY 0x30000 /* hd_dreq behavior control bits */
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volatile u32 pconfig; /* PIO configuration register */
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#define HPC3_SPCFG_P3 0x0003 /* Cycles to spend in P3 state */
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#define HPC3_SPCFG_P2W 0x001c /* Cycles to spend in P2 state for writes */
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#define HPC3_SPCFG_P2R 0x01e0 /* Cycles to spend in P2 state for reads */
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#define HPC3_SPCFG_P1 0x0e00 /* Cycles to spend in P1 state */
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#define HPC3_SPCFG_HW 0x1000 /* Enable 16-bit halfword PIO accesses to scsi */
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#define HPC3_SPCFG_SWAP 0x2000 /* Byte swap all PIO accesses */
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#define HPC3_SPCFG_EPAR 0x4000 /* Enable parity checking for PIO */
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#define HPC3_SPCFG_FUJI 0x8000 /* Fujitsu scsi controller mode for faster dma/pio */
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u32 _unused1[0x1000/4 - 6]; /* padding */
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};
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/* SEEQ ethernet HPC3 registers, only one seeq per HPC3. */
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struct hpc3_ethregs {
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/* Receiver registers. */
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volatile u32 rx_cbptr; /* current dma buffer ptr, diagnostic use only */
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volatile u32 rx_ndptr; /* next dma descriptor ptr */
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u32 _unused0[0x1000/4 - 2]; /* padding */
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volatile u32 rx_bcd; /* byte count info */
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#define HPC3_ERXBCD_BCNTMSK 0x00003fff /* bytes to be sent to memory */
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#define HPC3_ERXBCD_XIE 0x20000000 /* HPC3 interrupts cpu at end of this buf */
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#define HPC3_ERXBCD_EOX 0x80000000 /* flags this as end of descriptor chain */
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volatile u32 rx_ctrl; /* control register */
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#define HPC3_ERXCTRL_STAT50 0x0000003f /* Receive status reg bits of Seeq8003 */
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#define HPC3_ERXCTRL_STAT6 0x00000040 /* Rdonly irq status */
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#define HPC3_ERXCTRL_STAT7 0x00000080 /* Rdonlt old/new status bit from Seeq */
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#define HPC3_ERXCTRL_ENDIAN 0x00000100 /* Endian for dma channel, little=1 big=0 */
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#define HPC3_ERXCTRL_ACTIVE 0x00000200 /* Tells if DMA transfer is in progress */
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#define HPC3_ERXCTRL_AMASK 0x00000400 /* Tells if ACTIVE inhibits PIO's to hpc3 */
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#define HPC3_ERXCTRL_RBO 0x00000800 /* Receive buffer overflow if set to 1 */
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volatile u32 rx_gfptr; /* current GIO fifo ptr */
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volatile u32 rx_dfptr; /* current device fifo ptr */
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u32 _unused1; /* padding */
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volatile u32 reset; /* reset register */
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#define HPC3_ERST_CRESET 0x1 /* Reset dma channel and external controller */
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#define HPC3_ERST_CLRIRQ 0x2 /* Clear channel interrupt */
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#define HPC3_ERST_LBACK 0x4 /* Enable diagnostic loopback mode of Seeq8003 */
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volatile u32 dconfig; /* DMA configuration register */
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#define HPC3_EDCFG_D1 0x0000f /* Cycles to spend in D1 state for PIO */
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#define HPC3_EDCFG_D2 0x000f0 /* Cycles to spend in D2 state for PIO */
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#define HPC3_EDCFG_D3 0x00f00 /* Cycles to spend in D3 state for PIO */
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#define HPC3_EDCFG_WCTRL 0x01000 /* Enable writes of desc into ex ctrl port */
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#define HPC3_EDCFG_FRXDC 0x02000 /* Clear eop stat bits upon rxdc, hw seeq fix */
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#define HPC3_EDCFG_FEOP 0x04000 /* Bad packet marker timeout enable */
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#define HPC3_EDCFG_FIRQ 0x08000 /* Another bad packet timeout enable */
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#define HPC3_EDCFG_PTO 0x30000 /* Programmed timeout value for above two */
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volatile u32 pconfig; /* PIO configuration register */
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#define HPC3_EPCFG_P1 0x000f /* Cycles to spend in P1 state for PIO */
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#define HPC3_EPCFG_P2 0x00f0 /* Cycles to spend in P2 state for PIO */
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#define HPC3_EPCFG_P3 0x0f00 /* Cycles to spend in P3 state for PIO */
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#define HPC3_EPCFG_TST 0x1000 /* Diagnostic ram test feature bit */
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u32 _unused2[0x1000/4 - 8]; /* padding */
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/* Transmitter registers. */
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volatile u32 tx_cbptr; /* current dma buffer ptr, diagnostic use only */
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volatile u32 tx_ndptr; /* next dma descriptor ptr */
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u32 _unused3[0x1000/4 - 2]; /* padding */
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volatile u32 tx_bcd; /* byte count info */
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#define HPC3_ETXBCD_BCNTMSK 0x00003fff /* bytes to be read from memory */
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#define HPC3_ETXBCD_ESAMP 0x10000000 /* if set, too late to add descriptor */
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#define HPC3_ETXBCD_XIE 0x20000000 /* Interrupt cpu at end of cur desc */
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#define HPC3_ETXBCD_EOP 0x40000000 /* Last byte of cur buf is end of packet */
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#define HPC3_ETXBCD_EOX 0x80000000 /* This buf is the end of desc chain */
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volatile u32 tx_ctrl; /* control register */
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#define HPC3_ETXCTRL_STAT30 0x0000000f /* Rdonly copy of seeq tx stat reg */
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#define HPC3_ETXCTRL_STAT4 0x00000010 /* Indicate late collision occurred */
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#define HPC3_ETXCTRL_STAT75 0x000000e0 /* Rdonly irq status from seeq */
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#define HPC3_ETXCTRL_ENDIAN 0x00000100 /* DMA channel endian mode, 1=little 0=big */
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#define HPC3_ETXCTRL_ACTIVE 0x00000200 /* DMA tx channel is active */
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#define HPC3_ETXCTRL_AMASK 0x00000400 /* Indicates ACTIVE inhibits PIO's */
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volatile u32 tx_gfptr; /* current GIO fifo ptr */
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volatile u32 tx_dfptr; /* current device fifo ptr */
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u32 _unused4[0x1000/4 - 4]; /* padding */
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};
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struct hpc3_regs {
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/* First regs for the PBUS 8 dma channels. */
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struct hpc3_pbus_dmacregs pbdma[8];
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/* Now the HPC scsi registers, we get two scsi reg sets. */
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struct hpc3_scsiregs scsi_chan0, scsi_chan1;
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/* The SEEQ hpc3 ethernet dma/control registers. */
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struct hpc3_ethregs ethregs;
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/* Here are where the hpc3 fifo's can be directly accessed
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* via PIO accesses. Under normal operation we never stick
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* our grubby paws in here so it's just padding. */
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u32 _unused0[0x18000/4];
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/* HPC3 irq status regs. Due to a peculiar bug you need to
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* look at two different register addresses to get at all of
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* the status bits. The first reg can only reliably report
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* bits 4:0 of the status, and the second reg can only
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* reliably report bits 9:5 of the hpc3 irq status. I told
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* you it was a peculiar bug. ;-)
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*/
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volatile u32 istat0; /* Irq status, only bits <4:0> reliable. */
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#define HPC3_ISTAT_PBIMASK 0x0ff /* irq bits for pbus devs 0 --> 7 */
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#define HPC3_ISTAT_SC0MASK 0x100 /* irq bit for scsi channel 0 */
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#define HPC3_ISTAT_SC1MASK 0x200 /* irq bit for scsi channel 1 */
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volatile u32 gio_misc; /* GIO misc control bits. */
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#define HPC3_GIOMISC_ERTIME 0x1 /* Enable external timer real time. */
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#define HPC3_GIOMISC_DENDIAN 0x2 /* dma descriptor endian, 1=lit 0=big */
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u32 eeprom; /* EEPROM data reg. */
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#define HPC3_EEPROM_EPROT 0x01 /* Protect register enable */
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#define HPC3_EEPROM_CSEL 0x02 /* Chip select */
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#define HPC3_EEPROM_ECLK 0x04 /* EEPROM clock */
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#define HPC3_EEPROM_DATO 0x08 /* Data out */
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#define HPC3_EEPROM_DATI 0x10 /* Data in */
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volatile u32 istat1; /* Irq status, only bits <9:5> reliable. */
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volatile u32 bestat; /* Bus error interrupt status reg. */
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#define HPC3_BESTAT_BLMASK 0x000ff /* Bus lane where bad parity occurred */
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#define HPC3_BESTAT_CTYPE 0x00100 /* Bus cycle type, 0=PIO 1=DMA */
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#define HPC3_BESTAT_PIDSHIFT 9
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#define HPC3_BESTAT_PIDMASK 0x3f700 /* DMA channel parity identifier */
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u32 _unused1[0x14000/4 - 5]; /* padding */
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/* Now direct PIO per-HPC3 peripheral access to external regs. */
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volatile u32 scsi0_ext[256]; /* SCSI channel 0 external regs */
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u32 _unused2[0x7c00/4];
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volatile u32 scsi1_ext[256]; /* SCSI channel 1 external regs */
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u32 _unused3[0x7c00/4];
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volatile u32 eth_ext[320]; /* Ethernet external registers */
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u32 _unused4[0x3b00/4];
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/* Per-peripheral device external registers and DMA/PIO control. */
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volatile u32 pbus_extregs[16][256];
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volatile u32 pbus_dmacfg[8][128];
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/* Cycles to spend in D3 for reads */
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#define HPC3_DMACFG_D3R_MASK 0x00000001
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#define HPC3_DMACFG_D3R_SHIFT 0
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/* Cycles to spend in D4 for reads */
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#define HPC3_DMACFG_D4R_MASK 0x0000001e
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#define HPC3_DMACFG_D4R_SHIFT 1
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/* Cycles to spend in D5 for reads */
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#define HPC3_DMACFG_D5R_MASK 0x000001e0
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#define HPC3_DMACFG_D5R_SHIFT 5
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/* Cycles to spend in D3 for writes */
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#define HPC3_DMACFG_D3W_MASK 0x00000200
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#define HPC3_DMACFG_D3W_SHIFT 9
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/* Cycles to spend in D4 for writes */
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#define HPC3_DMACFG_D4W_MASK 0x00003c00
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#define HPC3_DMACFG_D4W_SHIFT 10
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/* Cycles to spend in D5 for writes */
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#define HPC3_DMACFG_D5W_MASK 0x0003c000
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#define HPC3_DMACFG_D5W_SHIFT 14
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/* Enable 16-bit DMA access mode */
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#define HPC3_DMACFG_DS16 0x00040000
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/* Places halfwords on high 16 bits of bus */
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#define HPC3_DMACFG_EVENHI 0x00080000
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/* Make this device real time */
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#define HPC3_DMACFG_RTIME 0x00200000
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/* 5 bit burst count for DMA device */
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#define HPC3_DMACFG_BURST_MASK 0x07c00000
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#define HPC3_DMACFG_BURST_SHIFT 22
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/* Use live pbus_dreq unsynchronized signal */
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#define HPC3_DMACFG_DRQLIVE 0x08000000
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volatile u32 pbus_piocfg[16][64];
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/* Cycles to spend in P2 state for reads */
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#define HPC3_PIOCFG_P2R_MASK 0x00001
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#define HPC3_PIOCFG_P2R_SHIFT 0
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/* Cycles to spend in P3 state for reads */
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#define HPC3_PIOCFG_P3R_MASK 0x0001e
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#define HPC3_PIOCFG_P3R_SHIFT 1
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/* Cycles to spend in P4 state for reads */
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#define HPC3_PIOCFG_P4R_MASK 0x001e0
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#define HPC3_PIOCFG_P4R_SHIFT 5
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/* Cycles to spend in P2 state for writes */
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||
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#define HPC3_PIOCFG_P2W_MASK 0x00200
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||
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#define HPC3_PIOCFG_P2W_SHIFT 9
|
||
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|
/* Cycles to spend in P3 state for writes */
|
||
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#define HPC3_PIOCFG_P3W_MASK 0x03c00
|
||
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|
#define HPC3_PIOCFG_P3W_SHIFT 10
|
||
|
|
/* Cycles to spend in P4 state for writes */
|
||
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|
#define HPC3_PIOCFG_P4W_MASK 0x3c000
|
||
|
|
#define HPC3_PIOCFG_P4W_SHIFT 14
|
||
|
|
/* Enable 16-bit PIO accesses */
|
||
|
|
#define HPC3_PIOCFG_DS16 0x40000
|
||
|
|
/* Place even address bits in bits <15:8> */
|
||
|
|
#define HPC3_PIOCFG_EVENHI 0x80000
|
||
|
|
|
||
|
|
/* PBUS PROM control regs. */
|
||
|
|
volatile u32 pbus_promwe; /* PROM write enable register */
|
||
|
|
#define HPC3_PROM_WENAB 0x1 /* Enable writes to the PROM */
|
||
|
|
|
||
|
|
u32 _unused5[0x0800/4 - 1];
|
||
|
|
volatile u32 pbus_promswap; /* Chip select swap reg */
|
||
|
|
#define HPC3_PROM_SWAP 0x1 /* invert GIO addr bit to select prom0 or prom1 */
|
||
|
|
|
||
|
|
u32 _unused6[0x0800/4 - 1];
|
||
|
|
volatile u32 pbus_gout; /* PROM general purpose output reg */
|
||
|
|
#define HPC3_PROM_STAT 0x1 /* General purpose status bit in gout */
|
||
|
|
|
||
|
|
u32 _unused7[0x1000/4 - 1];
|
||
|
|
volatile u32 rtcregs[14]; /* Dallas clock registers */
|
||
|
|
u32 _unused8[50];
|
||
|
|
volatile u32 bbram[8192-50-14]; /* Battery backed ram */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* It is possible to have two HPC3's within the address space on
|
||
|
|
* one machine, though only having one is more likely on an Indy.
|
||
|
|
*/
|
||
|
|
extern struct hpc3_regs *hpc3c0, *hpc3c1;
|
||
|
|
#define HPC3_CHIP0_BASE 0x1fb80000 /* physical */
|
||
|
|
#define HPC3_CHIP1_BASE 0x1fb00000 /* physical */
|
||
|
|
|
||
|
|
extern void sgihpc_init(void);
|
||
|
|
|
||
|
|
#endif /* _SGI_HPC3_H */
|