1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * hpc3.h: Definitions for SGI HPC3 controller 7 * 8 * Copyright (C) 1996 David S. Miller 9 * Copyright (C) 1998 Ralf Baechle 10 */ 11 12 #ifndef _SGI_HPC3_H 13 #define _SGI_HPC3_H 14 15 #include <linux/types.h> 16 #include <asm/page.h> 17 18 /* An HPC DMA descriptor. */ 19 struct hpc_dma_desc { 20 u32 pbuf; /* physical address of data buffer */ 21 u32 cntinfo; /* counter and info bits */ 22 #define HPCDMA_EOX 0x80000000 /* last desc in chain for tx */ 23 #define HPCDMA_EOR 0x80000000 /* last desc in chain for rx */ 24 #define HPCDMA_EOXP 0x40000000 /* end of packet for tx */ 25 #define HPCDMA_EORP 0x40000000 /* end of packet for rx */ 26 #define HPCDMA_XIE 0x20000000 /* irq generated when at end of this desc */ 27 #define HPCDMA_XIU 0x01000000 /* Tx buffer in use by CPU. */ 28 #define HPCDMA_EIPC 0x00ff0000 /* SEEQ ethernet special xternal bytecount */ 29 #define HPCDMA_ETXD 0x00008000 /* set to one by HPC when packet tx'd */ 30 #define HPCDMA_OWN 0x00004000 /* Denotes ring buffer ownership on rx */ 31 #define HPCDMA_BCNT 0x00003fff /* size in bytes of this dma buffer */ 32 33 u32 pnext; /* paddr of next hpc_dma_desc if any */ 34 }; 35 36 /* The set of regs for each HPC3 PBUS DMA channel. */ 37 struct hpc3_pbus_dmacregs { 38 volatile u32 pbdma_bptr; /* pbus dma channel buffer ptr */ 39 volatile u32 pbdma_dptr; /* pbus dma channel desc ptr */ 40 u32 _unused0[0x1000/4 - 2]; /* padding */ 41 volatile u32 pbdma_ctrl; /* pbus dma channel control register has 42 * completely different meaning for read 43 * compared with write */ 44 /* read */ 45 #define HPC3_PDMACTRL_INT 0x00000001 /* interrupt (cleared after read) */ 46 #define HPC3_PDMACTRL_ISACT 0x00000002 /* channel active */ 47 /* write */ 48 #define HPC3_PDMACTRL_SEL 0x00000002 /* little endian transfer */ 49 #define HPC3_PDMACTRL_RCV 0x00000004 /* direction is receive */ 50 #define HPC3_PDMACTRL_FLSH 0x00000008 /* enable flush for receive DMA */ 51 #define HPC3_PDMACTRL_ACT 0x00000010 /* start dma transfer */ 52 #define HPC3_PDMACTRL_LD 0x00000020 /* load enable for ACT */ 53 #define HPC3_PDMACTRL_RT 0x00000040 /* Use realtime GIO bus servicing */ 54 #define HPC3_PDMACTRL_HW 0x0000ff00 /* DMA High-water mark */ 55 #define HPC3_PDMACTRL_FB 0x003f0000 /* Ptr to beginning of fifo */ 56 #define HPC3_PDMACTRL_FE 0x3f000000 /* Ptr to end of fifo */ 57 58 u32 _unused1[0x1000/4 - 1]; /* padding */ 59 }; 60 61 /* The HPC3 SCSI registers, this does not include external ones. */ 62 struct hpc3_scsiregs { 63 volatile u32 cbptr; /* current dma buffer ptr, diagnostic use only */ 64 volatile u32 ndptr; /* next dma descriptor ptr */ 65 u32 _unused0[0x1000/4 - 2]; /* padding */ 66 volatile u32 bcd; /* byte count info */ 67 #define HPC3_SBCD_BCNTMSK 0x00003fff /* bytes to transfer from/to memory */ 68 #define HPC3_SBCD_XIE 0x00004000 /* Send IRQ when done with cur buf */ 69 #define HPC3_SBCD_EOX 0x00008000 /* Indicates this is last buf in chain */ 70 71 volatile u32 ctrl; /* control register */ 72 #define HPC3_SCTRL_IRQ 0x01 /* IRQ asserted, either dma done or parity */ 73 #define HPC3_SCTRL_ENDIAN 0x02 /* DMA endian mode, 0=big 1=little */ 74 #define HPC3_SCTRL_DIR 0x04 /* DMA direction, 1=dev2mem 0=mem2dev */ 75 #define HPC3_SCTRL_FLUSH 0x08 /* Tells HPC3 to flush scsi fifos */ 76 #define HPC3_SCTRL_ACTIVE 0x10 /* SCSI DMA channel is active */ 77 #define HPC3_SCTRL_AMASK 0x20 /* DMA active inhibits PIO */ 78 #define HPC3_SCTRL_CRESET 0x40 /* Resets dma channel and external controller */ 79 #define HPC3_SCTRL_PERR 0x80 /* Bad parity on HPC3 iface to scsi controller */ 80 81 volatile u32 gfptr; /* current GIO fifo ptr */ 82 volatile u32 dfptr; /* current device fifo ptr */ 83 volatile u32 dconfig; /* DMA configuration register */ 84 #define HPC3_SDCFG_HCLK 0x00001 /* Enable DMA half clock mode */ 85 #define HPC3_SDCFG_D1 0x00006 /* Cycles to spend in D1 state */ 86 #define HPC3_SDCFG_D2 0x00038 /* Cycles to spend in D2 state */ 87 #define HPC3_SDCFG_D3 0x001c0 /* Cycles to spend in D3 state */ 88 #define HPC3_SDCFG_HWAT 0x00e00 /* DMA high water mark */ 89 #define HPC3_SDCFG_HW 0x01000 /* Enable 16-bit halfword DMA accesses to scsi */ 90 #define HPC3_SDCFG_SWAP 0x02000 /* Byte swap all DMA accesses */ 91 #define HPC3_SDCFG_EPAR 0x04000 /* Enable parity checking for DMA */ 92 #define HPC3_SDCFG_POLL 0x08000 /* hd_dreq polarity control */ 93 #define HPC3_SDCFG_ERLY 0x30000 /* hd_dreq behavior control bits */ 94 95 volatile u32 pconfig; /* PIO configuration register */ 96 #define HPC3_SPCFG_P3 0x0003 /* Cycles to spend in P3 state */ 97 #define HPC3_SPCFG_P2W 0x001c /* Cycles to spend in P2 state for writes */ 98 #define HPC3_SPCFG_P2R 0x01e0 /* Cycles to spend in P2 state for reads */ 99 #define HPC3_SPCFG_P1 0x0e00 /* Cycles to spend in P1 state */ 100 #define HPC3_SPCFG_HW 0x1000 /* Enable 16-bit halfword PIO accesses to scsi */ 101 #define HPC3_SPCFG_SWAP 0x2000 /* Byte swap all PIO accesses */ 102 #define HPC3_SPCFG_EPAR 0x4000 /* Enable parity checking for PIO */ 103 #define HPC3_SPCFG_FUJI 0x8000 /* Fujitsu scsi controller mode for faster dma/pio */ 104 105 u32 _unused1[0x1000/4 - 6]; /* padding */ 106 }; 107 108 /* SEEQ ethernet HPC3 registers, only one seeq per HPC3. */ 109 struct hpc3_ethregs { 110 /* Receiver registers. */ 111 volatile u32 rx_cbptr; /* current dma buffer ptr, diagnostic use only */ 112 volatile u32 rx_ndptr; /* next dma descriptor ptr */ 113 u32 _unused0[0x1000/4 - 2]; /* padding */ 114 volatile u32 rx_bcd; /* byte count info */ 115 #define HPC3_ERXBCD_BCNTMSK 0x00003fff /* bytes to be sent to memory */ 116 #define HPC3_ERXBCD_XIE 0x20000000 /* HPC3 interrupts cpu at end of this buf */ 117 #define HPC3_ERXBCD_EOX 0x80000000 /* flags this as end of descriptor chain */ 118 119 volatile u32 rx_ctrl; /* control register */ 120 #define HPC3_ERXCTRL_STAT50 0x0000003f /* Receive status reg bits of Seeq8003 */ 121 #define HPC3_ERXCTRL_STAT6 0x00000040 /* Rdonly irq status */ 122 #define HPC3_ERXCTRL_STAT7 0x00000080 /* Rdonlt old/new status bit from Seeq */ 123 #define HPC3_ERXCTRL_ENDIAN 0x00000100 /* Endian for dma channel, little=1 big=0 */ 124 #define HPC3_ERXCTRL_ACTIVE 0x00000200 /* Tells if DMA transfer is in progress */ 125 #define HPC3_ERXCTRL_AMASK 0x00000400 /* Tells if ACTIVE inhibits PIO's to hpc3 */ 126 #define HPC3_ERXCTRL_RBO 0x00000800 /* Receive buffer overflow if set to 1 */ 127 128 volatile u32 rx_gfptr; /* current GIO fifo ptr */ 129 volatile u32 rx_dfptr; /* current device fifo ptr */ 130 u32 _unused1; /* padding */ 131 volatile u32 reset; /* reset register */ 132 #define HPC3_ERST_CRESET 0x1 /* Reset dma channel and external controller */ 133 #define HPC3_ERST_CLRIRQ 0x2 /* Clear channel interrupt */ 134 #define HPC3_ERST_LBACK 0x4 /* Enable diagnostic loopback mode of Seeq8003 */ 135 136 volatile u32 dconfig; /* DMA configuration register */ 137 #define HPC3_EDCFG_D1 0x0000f /* Cycles to spend in D1 state for PIO */ 138 #define HPC3_EDCFG_D2 0x000f0 /* Cycles to spend in D2 state for PIO */ 139 #define HPC3_EDCFG_D3 0x00f00 /* Cycles to spend in D3 state for PIO */ 140 #define HPC3_EDCFG_WCTRL 0x01000 /* Enable writes of desc into ex ctrl port */ 141 #define HPC3_EDCFG_FRXDC 0x02000 /* Clear eop stat bits upon rxdc, hw seeq fix */ 142 #define HPC3_EDCFG_FEOP 0x04000 /* Bad packet marker timeout enable */ 143 #define HPC3_EDCFG_FIRQ 0x08000 /* Another bad packet timeout enable */ 144 #define HPC3_EDCFG_PTO 0x30000 /* Programmed timeout value for above two */ 145 146 volatile u32 pconfig; /* PIO configuration register */ 147 #define HPC3_EPCFG_P1 0x000f /* Cycles to spend in P1 state for PIO */ 148 #define HPC3_EPCFG_P2 0x00f0 /* Cycles to spend in P2 state for PIO */ 149 #define HPC3_EPCFG_P3 0x0f00 /* Cycles to spend in P3 state for PIO */ 150 #define HPC3_EPCFG_TST 0x1000 /* Diagnostic ram test feature bit */ 151 152 u32 _unused2[0x1000/4 - 8]; /* padding */ 153 154 /* Transmitter registers. */ 155 volatile u32 tx_cbptr; /* current dma buffer ptr, diagnostic use only */ 156 volatile u32 tx_ndptr; /* next dma descriptor ptr */ 157 u32 _unused3[0x1000/4 - 2]; /* padding */ 158 volatile u32 tx_bcd; /* byte count info */ 159 #define HPC3_ETXBCD_BCNTMSK 0x00003fff /* bytes to be read from memory */ 160 #define HPC3_ETXBCD_ESAMP 0x10000000 /* if set, too late to add descriptor */ 161 #define HPC3_ETXBCD_XIE 0x20000000 /* Interrupt cpu at end of cur desc */ 162 #define HPC3_ETXBCD_EOP 0x40000000 /* Last byte of cur buf is end of packet */ 163 #define HPC3_ETXBCD_EOX 0x80000000 /* This buf is the end of desc chain */ 164 165 volatile u32 tx_ctrl; /* control register */ 166 #define HPC3_ETXCTRL_STAT30 0x0000000f /* Rdonly copy of seeq tx stat reg */ 167 #define HPC3_ETXCTRL_STAT4 0x00000010 /* Indicate late collision occurred */ 168 #define HPC3_ETXCTRL_STAT75 0x000000e0 /* Rdonly irq status from seeq */ 169 #define HPC3_ETXCTRL_ENDIAN 0x00000100 /* DMA channel endian mode, 1=little 0=big */ 170 #define HPC3_ETXCTRL_ACTIVE 0x00000200 /* DMA tx channel is active */ 171 #define HPC3_ETXCTRL_AMASK 0x00000400 /* Indicates ACTIVE inhibits PIO's */ 172 173 volatile u32 tx_gfptr; /* current GIO fifo ptr */ 174 volatile u32 tx_dfptr; /* current device fifo ptr */ 175 u32 _unused4[0x1000/4 - 4]; /* padding */ 176 }; 177 178 struct hpc3_regs { 179 /* First regs for the PBUS 8 dma channels. */ 180 struct hpc3_pbus_dmacregs pbdma[8]; 181 182 /* Now the HPC scsi registers, we get two scsi reg sets. */ 183 struct hpc3_scsiregs scsi_chan0, scsi_chan1; 184 185 /* The SEEQ hpc3 ethernet dma/control registers. */ 186 struct hpc3_ethregs ethregs; 187 188 /* Here are where the hpc3 fifo's can be directly accessed 189 * via PIO accesses. Under normal operation we never stick 190 * our grubby paws in here so it's just padding. */ 191 u32 _unused0[0x18000/4]; 192 193 /* HPC3 irq status regs. Due to a peculiar bug you need to 194 * look at two different register addresses to get at all of 195 * the status bits. The first reg can only reliably report 196 * bits 4:0 of the status, and the second reg can only 197 * reliably report bits 9:5 of the hpc3 irq status. I told 198 * you it was a peculiar bug. ;-) 199 */ 200 volatile u32 istat0; /* Irq status, only bits <4:0> reliable. */ 201 #define HPC3_ISTAT_PBIMASK 0x0ff /* irq bits for pbus devs 0 --> 7 */ 202 #define HPC3_ISTAT_SC0MASK 0x100 /* irq bit for scsi channel 0 */ 203 #define HPC3_ISTAT_SC1MASK 0x200 /* irq bit for scsi channel 1 */ 204 205 volatile u32 gio_misc; /* GIO misc control bits. */ 206 #define HPC3_GIOMISC_ERTIME 0x1 /* Enable external timer real time. */ 207 #define HPC3_GIOMISC_DENDIAN 0x2 /* dma descriptor endian, 1=lit 0=big */ 208 209 u32 eeprom; /* EEPROM data reg. */ 210 #define HPC3_EEPROM_EPROT 0x01 /* Protect register enable */ 211 #define HPC3_EEPROM_CSEL 0x02 /* Chip select */ 212 #define HPC3_EEPROM_ECLK 0x04 /* EEPROM clock */ 213 #define HPC3_EEPROM_DATO 0x08 /* Data out */ 214 #define HPC3_EEPROM_DATI 0x10 /* Data in */ 215 216 volatile u32 istat1; /* Irq status, only bits <9:5> reliable. */ 217 volatile u32 bestat; /* Bus error interrupt status reg. */ 218 #define HPC3_BESTAT_BLMASK 0x000ff /* Bus lane where bad parity occurred */ 219 #define HPC3_BESTAT_CTYPE 0x00100 /* Bus cycle type, 0=PIO 1=DMA */ 220 #define HPC3_BESTAT_PIDSHIFT 9 221 #define HPC3_BESTAT_PIDMASK 0x3f700 /* DMA channel parity identifier */ 222 223 u32 _unused1[0x14000/4 - 5]; /* padding */ 224 225 /* Now direct PIO per-HPC3 peripheral access to external regs. */ 226 volatile u32 scsi0_ext[256]; /* SCSI channel 0 external regs */ 227 u32 _unused2[0x7c00/4]; 228 volatile u32 scsi1_ext[256]; /* SCSI channel 1 external regs */ 229 u32 _unused3[0x7c00/4]; 230 volatile u32 eth_ext[320]; /* Ethernet external registers */ 231 u32 _unused4[0x3b00/4]; 232 233 /* Per-peripheral device external registers and DMA/PIO control. */ 234 volatile u32 pbus_extregs[16][256]; 235 volatile u32 pbus_dmacfg[8][128]; 236 /* Cycles to spend in D3 for reads */ 237 #define HPC3_DMACFG_D3R_MASK 0x00000001 238 #define HPC3_DMACFG_D3R_SHIFT 0 239 /* Cycles to spend in D4 for reads */ 240 #define HPC3_DMACFG_D4R_MASK 0x0000001e 241 #define HPC3_DMACFG_D4R_SHIFT 1 242 /* Cycles to spend in D5 for reads */ 243 #define HPC3_DMACFG_D5R_MASK 0x000001e0 244 #define HPC3_DMACFG_D5R_SHIFT 5 245 /* Cycles to spend in D3 for writes */ 246 #define HPC3_DMACFG_D3W_MASK 0x00000200 247 #define HPC3_DMACFG_D3W_SHIFT 9 248 /* Cycles to spend in D4 for writes */ 249 #define HPC3_DMACFG_D4W_MASK 0x00003c00 250 #define HPC3_DMACFG_D4W_SHIFT 10 251 /* Cycles to spend in D5 for writes */ 252 #define HPC3_DMACFG_D5W_MASK 0x0003c000 253 #define HPC3_DMACFG_D5W_SHIFT 14 254 /* Enable 16-bit DMA access mode */ 255 #define HPC3_DMACFG_DS16 0x00040000 256 /* Places halfwords on high 16 bits of bus */ 257 #define HPC3_DMACFG_EVENHI 0x00080000 258 /* Make this device real time */ 259 #define HPC3_DMACFG_RTIME 0x00200000 260 /* 5 bit burst count for DMA device */ 261 #define HPC3_DMACFG_BURST_MASK 0x07c00000 262 #define HPC3_DMACFG_BURST_SHIFT 22 263 /* Use live pbus_dreq unsynchronized signal */ 264 #define HPC3_DMACFG_DRQLIVE 0x08000000 265 volatile u32 pbus_piocfg[16][64]; 266 /* Cycles to spend in P2 state for reads */ 267 #define HPC3_PIOCFG_P2R_MASK 0x00001 268 #define HPC3_PIOCFG_P2R_SHIFT 0 269 /* Cycles to spend in P3 state for reads */ 270 #define HPC3_PIOCFG_P3R_MASK 0x0001e 271 #define HPC3_PIOCFG_P3R_SHIFT 1 272 /* Cycles to spend in P4 state for reads */ 273 #define HPC3_PIOCFG_P4R_MASK 0x001e0 274 #define HPC3_PIOCFG_P4R_SHIFT 5 275 /* Cycles to spend in P2 state for writes */ 276 #define HPC3_PIOCFG_P2W_MASK 0x00200 277 #define HPC3_PIOCFG_P2W_SHIFT 9 278 /* Cycles to spend in P3 state for writes */ 279 #define HPC3_PIOCFG_P3W_MASK 0x03c00 280 #define HPC3_PIOCFG_P3W_SHIFT 10 281 /* Cycles to spend in P4 state for writes */ 282 #define HPC3_PIOCFG_P4W_MASK 0x3c000 283 #define HPC3_PIOCFG_P4W_SHIFT 14 284 /* Enable 16-bit PIO accesses */ 285 #define HPC3_PIOCFG_DS16 0x40000 286 /* Place even address bits in bits <15:8> */ 287 #define HPC3_PIOCFG_EVENHI 0x80000 288 289 /* PBUS PROM control regs. */ 290 volatile u32 pbus_promwe; /* PROM write enable register */ 291 #define HPC3_PROM_WENAB 0x1 /* Enable writes to the PROM */ 292 293 u32 _unused5[0x0800/4 - 1]; 294 volatile u32 pbus_promswap; /* Chip select swap reg */ 295 #define HPC3_PROM_SWAP 0x1 /* invert GIO addr bit to select prom0 or prom1 */ 296 297 u32 _unused6[0x0800/4 - 1]; 298 volatile u32 pbus_gout; /* PROM general purpose output reg */ 299 #define HPC3_PROM_STAT 0x1 /* General purpose status bit in gout */ 300 301 u32 _unused7[0x1000/4 - 1]; 302 volatile u32 rtcregs[14]; /* Dallas clock registers */ 303 u32 _unused8[50]; 304 volatile u32 bbram[8192-50-14]; /* Battery backed ram */ 305 }; 306 307 /* 308 * It is possible to have two HPC3's within the address space on 309 * one machine, though only having one is more likely on an Indy. 310 */ 311 extern struct hpc3_regs *hpc3c0, *hpc3c1; 312 #define HPC3_CHIP0_BASE 0x1fb80000 /* physical */ 313 #define HPC3_CHIP1_BASE 0x1fb00000 /* physical */ 314 315 extern void sgihpc_init(void); 316 317 #endif /* _SGI_HPC3_H */ 318