| 1 | /* |
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| 2 | * This file is subject to the terms and conditions of the GNU General Public |
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| 3 | * License. See the file "COPYING" in the main directory of this archive |
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| 4 | * for more details. |
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| 5 | * |
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| 6 | * hpc3.h: Definitions for SGI HPC3 controller |
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| 7 | * |
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| 8 | * Copyright (C) 1996 David S. Miller |
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| 9 | * Copyright (C) 1998 Ralf Baechle |
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| 10 | */ |
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| 11 | |
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| 12 | #ifndef _SGI_HPC3_H |
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| 13 | #define _SGI_HPC3_H |
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| 14 | |
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| 15 | #include <linux/types.h> |
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| 16 | #include <asm/page.h> |
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| 17 | |
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| 18 | /* An HPC DMA descriptor. */ |
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| 19 | struct hpc_dma_desc { |
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| 20 | __u32 pbuf; /* physical address of data buffer */ |
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| 21 | __u32 cntinfo; /* counter and info bits */ |
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| 22 | #define HPCDMA_EOX 0x80000000 /* last desc in chain for tx */ |
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| 23 | #define HPCDMA_EOR 0x80000000 /* last desc in chain for rx */ |
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| 24 | #define HPCDMA_EOXP 0x40000000 /* end of packet for tx */ |
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| 25 | #define HPCDMA_EORP 0x40000000 /* end of packet for rx */ |
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| 26 | #define HPCDMA_XIE 0x20000000 /* irq generated when at end of this desc */ |
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| 27 | #define HPCDMA_XIU 0x01000000 /* Tx buffer in use by CPU. */ |
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| 28 | #define HPCDMA_EIPC 0x00ff0000 /* SEEQ ethernet special xternal bytecount */ |
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| 29 | #define HPCDMA_ETXD 0x00008000 /* set to one by HPC when packet tx'd */ |
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| 30 | #define HPCDMA_OWN 0x00004000 /* Denotes ring buffer ownership on rx */ |
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| 31 | #define HPCDMA_BCNT 0x00003fff /* size in bytes of this dma buffer */ |
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| 32 | |
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| 33 | __u32 pnext; /* paddr of next hpc_dma_desc if any */ |
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| 34 | }; |
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| 35 | |
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| 36 | /* The set of regs for each HPC3 PBUS DMA channel. */ |
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| 37 | struct hpc3_pbus_dmacregs { |
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| 38 | volatile __u32 pbdma_bptr; /* pbus dma channel buffer ptr */ |
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| 39 | volatile __u32 pbdma_dptr; /* pbus dma channel desc ptr */ |
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| 40 | __u32 _unused0[0x1000/4 - 2]; /* padding */ |
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| 41 | volatile __u32 pbdma_ctrl; /* pbus dma channel control register has |
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| 42 | * copletely different meaning for read |
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| 43 | * compared with write */ |
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| 44 | /* read */ |
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| 45 | #define HPC3_PDMACTRL_INT 0x00000001 /* interrupt (cleared after read) */ |
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| 46 | #define HPC3_PDMACTRL_ISACT 0x00000002 /* channel active */ |
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| 47 | /* write */ |
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| 48 | #define HPC3_PDMACTRL_SEL 0x00000002 /* little endian transfer */ |
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| 49 | #define HPC3_PDMACTRL_RCV 0x00000004 /* direction is receive */ |
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| 50 | #define HPC3_PDMACTRL_FLSH 0x00000008 /* enable flush for receive DMA */ |
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| 51 | #define HPC3_PDMACTRL_ACT 0x00000010 /* start dma transfer */ |
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| 52 | #define HPC3_PDMACTRL_LD 0x00000020 /* load enable for ACT */ |
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| 53 | #define HPC3_PDMACTRL_RT 0x00000040 /* Use realtime GIO bus servicing */ |
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| 54 | #define HPC3_PDMACTRL_HW 0x0000ff00 /* DMA High-water mark */ |
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| 55 | #define HPC3_PDMACTRL_FB 0x003f0000 /* Ptr to beginning of fifo */ |
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| 56 | #define HPC3_PDMACTRL_FE 0x3f000000 /* Ptr to end of fifo */ |
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| 57 | |
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| 58 | __u32 _unused1[0x1000/4 - 1]; /* padding */ |
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| 59 | }; |
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| 60 | |
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| 61 | /* The HPC3 SCSI registers, this does not include external ones. */ |
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| 62 | struct hpc3_scsiregs { |
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| 63 | volatile __u32 cbptr; /* current dma buffer ptr, diagnostic use only */ |
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| 64 | volatile __u32 ndptr; /* next dma descriptor ptr */ |
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| 65 | __u32 _unused0[0x1000/4 - 2]; /* padding */ |
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| 66 | volatile __u32 bcd; /* byte count info */ |
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| 67 | #define HPC3_SBCD_BCNTMSK 0x00003fff /* bytes to transfer from/to memory */ |
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| 68 | #define HPC3_SBCD_XIE 0x00004000 /* Send IRQ when done with cur buf */ |
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| 69 | #define HPC3_SBCD_EOX 0x00008000 /* Indicates this is last buf in chain */ |
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| 70 | |
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| 71 | volatile __u32 ctrl; /* control register */ |
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| 72 | #define HPC3_SCTRL_IRQ 0x01 /* IRQ asserted, either dma done or parity */ |
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| 73 | #define HPC3_SCTRL_ENDIAN 0x02 /* DMA endian mode, 0=big 1=little */ |
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| 74 | #define HPC3_SCTRL_DIR 0x04 /* DMA direction, 1=dev2mem 0=mem2dev */ |
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| 75 | #define HPC3_SCTRL_FLUSH 0x08 /* Tells HPC3 to flush scsi fifos */ |
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| 76 | #define HPC3_SCTRL_ACTIVE 0x10 /* SCSI DMA channel is active */ |
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| 77 | #define HPC3_SCTRL_AMASK 0x20 /* DMA active inhibits PIO */ |
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| 78 | #define HPC3_SCTRL_CRESET 0x40 /* Resets dma channel and external controller */ |
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| 79 | #define HPC3_SCTRL_PERR 0x80 /* Bad parity on HPC3 iface to scsi controller */ |
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| 80 | |
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| 81 | volatile __u32 gfptr; /* current GIO fifo ptr */ |
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| 82 | volatile __u32 dfptr; /* current device fifo ptr */ |
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| 83 | volatile __u32 dconfig; /* DMA configuration register */ |
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| 84 | #define HPC3_SDCFG_HCLK 0x00001 /* Enable DMA half clock mode */ |
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| 85 | #define HPC3_SDCFG_D1 0x00006 /* Cycles to spend in D1 state */ |
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| 86 | #define HPC3_SDCFG_D2 0x00038 /* Cycles to spend in D2 state */ |
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| 87 | #define HPC3_SDCFG_D3 0x001c0 /* Cycles to spend in D3 state */ |
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| 88 | #define HPC3_SDCFG_HWAT 0x00e00 /* DMA high water mark */ |
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| 89 | #define HPC3_SDCFG_HW 0x01000 /* Enable 16-bit halfword DMA accesses to scsi */ |
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| 90 | #define HPC3_SDCFG_SWAP 0x02000 /* Byte swap all DMA accesses */ |
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| 91 | #define HPC3_SDCFG_EPAR 0x04000 /* Enable parity checking for DMA */ |
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| 92 | #define HPC3_SDCFG_POLL 0x08000 /* hd_dreq polarity control */ |
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| 93 | #define HPC3_SDCFG_ERLY 0x30000 /* hd_dreq behavior control bits */ |
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| 94 | |
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| 95 | volatile __u32 pconfig; /* PIO configuration register */ |
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| 96 | #define HPC3_SPCFG_P3 0x0003 /* Cycles to spend in P3 state */ |
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| 97 | #define HPC3_SPCFG_P2W 0x001c /* Cycles to spend in P2 state for writes */ |
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| 98 | #define HPC3_SPCFG_P2R 0x01e0 /* Cycles to spend in P2 state for reads */ |
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| 99 | #define HPC3_SPCFG_P1 0x0e00 /* Cycles to spend in P1 state */ |
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| 100 | #define HPC3_SPCFG_HW 0x1000 /* Enable 16-bit halfword PIO accesses to scsi */ |
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| 101 | #define HPC3_SPCFG_SWAP 0x2000 /* Byte swap all PIO accesses */ |
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| 102 | #define HPC3_SPCFG_EPAR 0x4000 /* Enable parity checking for PIO */ |
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| 103 | #define HPC3_SPCFG_FUJI 0x8000 /* Fujitsu scsi controller mode for faster dma/pio */ |
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| 104 | |
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| 105 | __u32 _unused1[0x1000/4 - 6]; /* padding */ |
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| 106 | }; |
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| 107 | |
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| 108 | /* SEEQ ethernet HPC3 registers, only one seeq per HPC3. */ |
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| 109 | struct hpc3_ethregs { |
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| 110 | /* Receiver registers. */ |
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| 111 | volatile __u32 rx_cbptr; /* current dma buffer ptr, diagnostic use only */ |
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| 112 | volatile __u32 rx_ndptr; /* next dma descriptor ptr */ |
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| 113 | __u32 _unused0[0x1000/4 - 2]; /* padding */ |
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| 114 | volatile __u32 rx_bcd; /* byte count info */ |
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| 115 | #define HPC3_ERXBCD_BCNTMSK 0x00003fff /* bytes to be sent to memory */ |
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| 116 | #define HPC3_ERXBCD_XIE 0x20000000 /* HPC3 interrupts cpu at end of this buf */ |
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| 117 | #define HPC3_ERXBCD_EOX 0x80000000 /* flags this as end of descriptor chain */ |
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| 118 | |
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| 119 | volatile __u32 rx_ctrl; /* control register */ |
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| 120 | #define HPC3_ERXCTRL_STAT50 0x0000003f /* Receive status reg bits of Seeq8003 */ |
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| 121 | #define HPC3_ERXCTRL_STAT6 0x00000040 /* Rdonly irq status */ |
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| 122 | #define HPC3_ERXCTRL_STAT7 0x00000080 /* Rdonlt old/new status bit from Seeq */ |
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| 123 | #define HPC3_ERXCTRL_ENDIAN 0x00000100 /* Endian for dma channel, little=1 big=0 */ |
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| 124 | #define HPC3_ERXCTRL_ACTIVE 0x00000200 /* Tells if DMA transfer is in progress */ |
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| 125 | #define HPC3_ERXCTRL_AMASK 0x00000400 /* Tells if ACTIVE inhibits PIO's to hpc3 */ |
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| 126 | #define HPC3_ERXCTRL_RBO 0x00000800 /* Receive buffer overflow if set to 1 */ |
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| 127 | |
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| 128 | volatile __u32 rx_gfptr; /* current GIO fifo ptr */ |
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| 129 | volatile __u32 rx_dfptr; /* current device fifo ptr */ |
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| 130 | __u32 _unused1; /* padding */ |
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| 131 | volatile __u32 rx_reset; /* reset register */ |
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| 132 | #define HPC3_ERXRST_CRESET 0x1 /* Reset dma channel and external controller */ |
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| 133 | #define HPC3_ERXRST_CLRIRQ 0x2 /* Clear channel interrupt */ |
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| 134 | #define HPC3_ERXRST_LBACK 0x4 /* Enable diagnostic loopback mode of Seeq8003 */ |
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| 135 | |
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| 136 | volatile __u32 rx_dconfig; /* DMA configuration register */ |
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| 137 | #define HPC3_ERXDCFG_D1 0x0000f /* Cycles to spend in D1 state for PIO */ |
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| 138 | #define HPC3_ERXDCFG_D2 0x000f0 /* Cycles to spend in D2 state for PIO */ |
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| 139 | #define HPC3_ERXDCFG_D3 0x00f00 /* Cycles to spend in D3 state for PIO */ |
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| 140 | #define HPC3_ERXDCFG_WCTRL 0x01000 /* Enable writes of desc into ex ctrl port */ |
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| 141 | #define HPC3_ERXDCFG_FRXDC 0x02000 /* Clear eop stat bits upon rxdc, hw seeq fix */ |
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| 142 | #define HPC3_ERXDCFG_FEOP 0x04000 /* Bad packet marker timeout enable */ |
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| 143 | #define HPC3_ERXDCFG_FIRQ 0x08000 /* Another bad packet timeout enable */ |
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| 144 | #define HPC3_ERXDCFG_PTO 0x30000 /* Programmed timeout value for above two */ |
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| 145 | |
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| 146 | volatile __u32 rx_pconfig; /* PIO configuration register */ |
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| 147 | #define HPC3_ERXPCFG_P1 0x000f /* Cycles to spend in P1 state for PIO */ |
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| 148 | #define HPC3_ERXPCFG_P2 0x00f0 /* Cycles to spend in P2 state for PIO */ |
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| 149 | #define HPC3_ERXPCFG_P3 0x0f00 /* Cycles to spend in P3 state for PIO */ |
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| 150 | #define HPC3_ERXPCFG_TST 0x1000 /* Diagnistic ram test feature bit */ |
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| 151 | |
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| 152 | __u32 _unused2[0x1000/4 - 8]; /* padding */ |
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| 153 | |
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| 154 | /* Transmitter registers. */ |
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| 155 | volatile __u32 tx_cbptr; /* current dma buffer ptr, diagnostic use only */ |
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| 156 | volatile __u32 tx_ndptr; /* next dma descriptor ptr */ |
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| 157 | __u32 _unused3[0x1000/4 - 2]; /* padding */ |
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| 158 | volatile __u32 tx_bcd; /* byte count info */ |
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| 159 | #define HPC3_ETXBCD_BCNTMSK 0x00003fff /* bytes to be read from memory */ |
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| 160 | #define HPC3_ETXBCD_ESAMP 0x10000000 /* if set, too late to add descriptor */ |
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| 161 | #define HPC3_ETXBCD_XIE 0x20000000 /* Interrupt cpu at end of cur desc */ |
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| 162 | #define HPC3_ETXBCD_EOP 0x40000000 /* Last byte of cur buf is end of packet */ |
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| 163 | #define HPC3_ETXBCD_EOX 0x80000000 /* This buf is the end of desc chain */ |
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| 164 | |
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| 165 | volatile __u32 tx_ctrl; /* control register */ |
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| 166 | #define HPC3_ETXCTRL_STAT30 0x0000000f /* Rdonly copy of seeq tx stat reg */ |
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| 167 | #define HPC3_ETXCTRL_STAT4 0x00000010 /* Indicate late collision occurred */ |
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| 168 | #define HPC3_ETXCTRL_STAT75 0x000000e0 /* Rdonly irq status from seeq */ |
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| 169 | #define HPC3_ETXCTRL_ENDIAN 0x00000100 /* DMA channel endian mode, 1=little 0=big */ |
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| 170 | #define HPC3_ETXCTRL_ACTIVE 0x00000200 /* DMA tx channel is active */ |
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| 171 | #define HPC3_ETXCTRL_AMASK 0x00000400 /* Indicates ACTIVE inhibits PIO's */ |
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| 172 | |
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| 173 | volatile __u32 tx_gfptr; /* current GIO fifo ptr */ |
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| 174 | volatile __u32 tx_dfptr; /* current device fifo ptr */ |
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| 175 | __u32 _unused4[0x1000/4 - 4]; /* padding */ |
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| 176 | }; |
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| 177 | |
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| 178 | struct hpc3_regs { |
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| 179 | /* First regs for the PBUS 8 dma channels. */ |
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| 180 | struct hpc3_pbus_dmacregs pbdma[8]; |
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| 181 | |
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| 182 | /* Now the HPC scsi registers, we get two scsi reg sets. */ |
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| 183 | struct hpc3_scsiregs scsi_chan0, scsi_chan1; |
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| 184 | |
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| 185 | /* The SEEQ hpc3 ethernet dma/control registers. */ |
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| 186 | struct hpc3_ethregs ethregs; |
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| 187 | |
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| 188 | /* Here are where the hpc3 fifo's can be directly accessed |
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| 189 | * via PIO accesses. Under normal operation we never stick |
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| 190 | * our grubby paws in here so it's just padding. */ |
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| 191 | __u32 _unused0[0x18000/4]; |
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| 192 | |
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| 193 | /* HPC3 irq status regs. Due to a peculiar bug you need to |
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| 194 | * look at two different register addresses to get at all of |
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| 195 | * the status bits. The first reg can only reliably report |
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| 196 | * bits 4:0 of the status, and the second reg can only |
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| 197 | * reliably report bits 9:5 of the hpc3 irq status. I told |
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| 198 | * you it was a peculiar bug. ;-) |
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| 199 | */ |
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| 200 | volatile __u32 istat0; /* Irq status, only bits <4:0> reliable. */ |
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| 201 | #define HPC3_ISTAT_PBIMASK 0x0ff /* irq bits for pbus devs 0 --> 7 */ |
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| 202 | #define HPC3_ISTAT_SC0MASK 0x100 /* irq bit for scsi channel 0 */ |
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| 203 | #define HPC3_ISTAT_SC1MASK 0x200 /* irq bit for scsi channel 1 */ |
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| 204 | |
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| 205 | volatile __u32 gio_misc; /* GIO misc control bits. */ |
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| 206 | #define HPC3_GIOMISC_ERTIME 0x1 /* Enable external timer real time. */ |
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| 207 | #define HPC3_GIOMISC_DENDIAN 0x2 /* dma descriptor endian, 1=lit 0=big */ |
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| 208 | |
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| 209 | volatile __u32 eeprom; /* EEPROM data reg. */ |
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| 210 | #define HPC3_EEPROM_EPROT 0x01 /* Protect register enable */ |
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| 211 | #define HPC3_EEPROM_CSEL 0x02 /* Chip select */ |
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| 212 | #define HPC3_EEPROM_ECLK 0x04 /* EEPROM clock */ |
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| 213 | #define HPC3_EEPROM_DATO 0x08 /* Data out */ |
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| 214 | #define HPC3_EEPROM_DATI 0x10 /* Data in */ |
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| 215 | |
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| 216 | volatile __u32 istat1; /* Irq status, only bits <9:5> reliable. */ |
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| 217 | volatile __u32 bestat; /* Bus error interrupt status reg. */ |
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| 218 | #define HPC3_BESTAT_BLMASK 0x000ff /* Bus lane where bad parity occurred */ |
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| 219 | #define HPC3_BESTAT_CTYPE 0x00100 /* Bus cycle type, 0=PIO 1=DMA */ |
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| 220 | #define HPC3_BESTAT_PIDSHIFT 9 |
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| 221 | #define HPC3_BESTAT_PIDMASK 0x3f700 /* DMA channel parity identifier */ |
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| 222 | |
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| 223 | __u32 _unused1[0x14000/4 - 5]; /* padding */ |
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| 224 | |
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| 225 | /* Now direct PIO per-HPC3 peripheral access to external regs. */ |
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| 226 | volatile __u32 scsi0_ext[256]; /* SCSI channel 0 external regs */ |
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| 227 | __u32 _unused2[0x7c00/4]; |
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| 228 | volatile __u32 scsi1_ext[256]; /* SCSI channel 1 external regs */ |
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| 229 | __u32 _unused3[0x7c00/4]; |
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| 230 | volatile __u32 eth_ext[320]; /* Ethernet external registers */ |
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| 231 | __u32 _unused4[0x3b00/4]; |
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| 232 | |
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| 233 | /* Per-peripheral device external registers and DMA/PIO control. */ |
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| 234 | volatile __u32 pbus_extregs[16][256]; |
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| 235 | volatile __u32 pbus_dmacfg[8][128]; |
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| 236 | /* Cycles to spend in D3 for reads */ |
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| 237 | #define HPC3_DMACFG_D3R_MASK 0x00000001 |
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| 238 | #define HPC3_DMACFG_D3R_SHIFT 0 |
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| 239 | /* Cycles to spend in D4 for reads */ |
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| 240 | #define HPC3_DMACFG_D4R_MASK 0x0000001e |
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| 241 | #define HPC3_DMACFG_D4R_SHIFT 1 |
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| 242 | /* Cycles to spend in D5 for reads */ |
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| 243 | #define HPC3_DMACFG_D5R_MASK 0x000001e0 |
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| 244 | #define HPC3_DMACFG_D5R_SHIFT 5 |
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| 245 | /* Cycles to spend in D3 for writes */ |
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| 246 | #define HPC3_DMACFG_D3W_MASK 0x00000200 |
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| 247 | #define HPC3_DMACFG_D3W_SHIFT 9 |
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| 248 | /* Cycles to spend in D4 for writes */ |
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| 249 | #define HPC3_DMACFG_D4W_MASK 0x00003c00 |
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| 250 | #define HPC3_DMACFG_D4W_SHIFT 10 |
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| 251 | /* Cycles to spend in D5 for writes */ |
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| 252 | #define HPC3_DMACFG_D5W_MASK 0x0003c000 |
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| 253 | #define HPC3_DMACFG_D5W_SHIFT 14 |
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| 254 | /* Enable 16-bit DMA access mode */ |
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| 255 | #define HPC3_DMACFG_DS16 0x00040000 |
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| 256 | /* Places halfwords on high 16 bits of bus */ |
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| 257 | #define HPC3_DMACFG_EVENHI 0x00080000 |
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| 258 | /* Make this device real time */ |
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| 259 | #define HPC3_DMACFG_RTIME 0x00200000 |
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| 260 | /* 5 bit burst count for DMA device */ |
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| 261 | #define HPC3_DMACFG_BURST_MASK 0x07c00000 |
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| 262 | #define HPC3_DMACFG_BURST_SHIFT 22 |
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| 263 | /* Use live pbus_dreq unsynchronized signal */ |
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| 264 | #define HPC3_DMACFG_DRQLIVE 0x08000000 |
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| 265 | volatile __u32 pbus_piocfg[16][64]; |
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| 266 | /* Cycles to spend in P2 state for reads */ |
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| 267 | #define HPC3_PIOCFG_P2R_MASK 0x00001 |
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| 268 | #define HPC3_PIOCFG_P2R_SHIFT 0 |
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| 269 | /* Cycles to spend in P3 state for reads */ |
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| 270 | #define HPC3_PIOCFG_P3R_MASK 0x0001e |
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| 271 | #define HPC3_PIOCFG_P3R_SHIFT 1 |
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| 272 | /* Cycles to spend in P4 state for reads */ |
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| 273 | #define HPC3_PIOCFG_P4R_MASK 0x001e0 |
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| 274 | #define HPC3_PIOCFG_P4R_SHIFT 5 |
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| 275 | /* Cycles to spend in P2 state for writes */ |
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| 276 | #define HPC3_PIOCFG_P2W_MASK 0x00200 |
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| 277 | #define HPC3_PIOCFG_P2W_SHIFT 9 |
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| 278 | /* Cycles to spend in P3 state for writes */ |
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| 279 | #define HPC3_PIOCFG_P3W_MASK 0x03c00 |
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| 280 | #define HPC3_PIOCFG_P3W_SHIFT 10 |
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| 281 | /* Cycles to spend in P4 state for writes */ |
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| 282 | #define HPC3_PIOCFG_P4W_MASK 0x3c000 |
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| 283 | #define HPC3_PIOCFG_P4W_SHIFT 14 |
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| 284 | /* Enable 16-bit PIO accesses */ |
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| 285 | #define HPC3_PIOCFG_DS16 0x40000 |
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| 286 | /* Place even address bits in bits <15:8> */ |
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| 287 | #define HPC3_PIOCFG_EVENHI 0x80000 |
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| 288 | |
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| 289 | /* PBUS PROM control regs. */ |
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| 290 | volatile __u32 pbus_promwe; /* PROM write enable register */ |
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| 291 | #define HPC3_PROM_WENAB 0x1 /* Enable writes to the PROM */ |
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| 292 | |
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| 293 | __u32 _unused5[0x0800/4 - 1]; |
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| 294 | volatile __u32 pbus_promswap; /* Chip select swap reg */ |
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| 295 | #define HPC3_PROM_SWAP 0x1 /* invert GIO addr bit to select prom0 or prom1 */ |
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| 296 | |
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| 297 | __u32 _unused6[0x0800/4 - 1]; |
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| 298 | volatile __u32 pbus_gout; /* PROM general purpose output reg */ |
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| 299 | #define HPC3_PROM_STAT 0x1 /* General purpose status bit in gout */ |
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| 300 | |
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| 301 | __u32 _unused7[0x1000/4 - 1]; |
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| 302 | volatile __u32 rtcregs[14]; /* Dallas clock registers */ |
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| 303 | __u32 _unused8[50]; |
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| 304 | volatile __u32 bbram[8192-50-14]; /* Battery backed ram */ |
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| 305 | }; |
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| 306 | |
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| 307 | /* |
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| 308 | * It is possible to have two HPC3's within the address space on |
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| 309 | * one machine, though only having one is more likely on an Indy. |
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| 310 | */ |
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| 311 | extern struct hpc3_regs *hpc3c0, *hpc3c1; |
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| 312 | #define HPC3_CHIP0_BASE 0x1fb80000 /* physical */ |
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| 313 | #define HPC3_CHIP1_BASE 0x1fb00000 /* physical */ |
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| 314 | |
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| 315 | extern void sgihpc_init(void); |
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| 316 | |
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| 317 | #endif /* _SGI_HPC3_H */ |
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