2 * sgihpc.h: Various HPC I/O controller defines. The HPC is basically
3 * the approximate functional equivalent of the Sun SYSIO
4 * on SGI INDY machines.
6 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
7 * Copyright (C) 1998 Ralf Baechle (ralf@gnu.org)
9 #ifndef __ASM_SGI_SGIHPC_H
10 #define __ASM_SGI_SGIHPC_H
12 #include <linux/types.h>
15 extern int sgi_has_ioc2; /* to know if we have older ioc1 or ioc2. */
16 extern int sgi_guiness; /* GUINESS or FULLHOUSE machine. */
17 extern int sgi_boardid; /* Board revision. */
19 /* An HPC dma descriptor. */
21 u32 pbuf; /* physical address of data buffer */
22 u32 cntinfo; /* counter and info bits */
23 #define HPCDMA_EOX 0x80000000 /* last desc in chain for tx */
24 #define HPCDMA_EOR 0x80000000 /* last desc in chain for rx */
25 #define HPCDMA_EOXP 0x40000000 /* end of packet for tx */
26 #define HPCDMA_EORP 0x40000000 /* end of packet for rx */
27 #define HPCDMA_XIE 0x20000000 /* irq generated when at end of this desc */
28 #define HPCDMA_XIU 0x01000000 /* Tx buffer in use by CPU. */
29 #define HPCDMA_EIPC 0x00ff0000 /* SEEQ ethernet special xternal bytecount */
30 #define HPCDMA_ETXD 0x00008000 /* set to one by HPC when packet tx'd */
31 #define HPCDMA_OWN 0x00004000 /* Denotes ring buffer ownership on rx */
32 #define HPCDMA_BCNT 0x00003fff /* size in bytes of this dma buffer */
34 u32 pnext; /* paddr of next hpc_dma_desc if any */
37 typedef volatile u32 hpcreg;
43 /* The set of regs for each HPC3 pbus dma channel. */
44 struct hpc3_pbus_dmacregs {
45 hpcreg pbdma_bptr; /* pbus dma channel buffer ptr */
46 hpcreg pbdma_dptr; /* pbus dma channel desc ptr */
47 char _unused1[PAGE_SIZE - (2 * sizeof(hpcreg))]; /* padding */
48 hpcreg pbdma_ctrl; /* pbus dma channel control register has
49 * copletely different meaning for read
50 * compared with write */
52 #define HPC3_PDMACTRL_INT 0x00000001 /* interrupt (cleared after read) */
53 #define HPC3_PDMACTRL_ISACT 0x00000002 /* channel active */
55 #define HPC3_PDMACTRL_SEL 0x00000002 /* little endian transfer */
56 #define HPC3_PDMACTRL_RCV 0x00000004 /* direction is receive */
57 #define HPC3_PDMACTRL_FLSH 0x00000008 /* enable flush for receive DMA */
58 #define HPC3_PDMACTRL_ACT 0x00000010 /* start dma transfer */
59 #define HPC3_PDMACTRL_LD 0x00000020 /* load enable for ACT */
60 #define HPC3_PDMACTRL_RT 0x00000040 /* Use realtime GIO bus servicing */
61 #define HPC3_PDMACTRL_HW 0x0000ff00 /* DMA High-water mark */
62 #define HPC3_PDMACTRL_FB 0x003f0000 /* Ptr to beginning of fifo */
63 #define HPC3_PDMACTRL_FE 0x3f000000 /* Ptr to end of fifo */
65 char _unused2[PAGE_SIZE - (sizeof(hpcreg))]; /* padding */
68 /* The HPC3 scsi registers, this does not include external ones. */
69 struct hpc3_scsiregs {
70 hpcreg cbptr; /* current dma buffer ptr, diagnostic use only */
71 hpcreg ndptr; /* next dma descriptor ptr */
72 char _unused1[PAGE_SIZE - (2 * sizeof(hpcreg))]; /* padding */
73 hpcreg bcd; /* byte count info */
74 #define HPC3_SBCD_BCNTMSK 0x00003fff /* bytes to transfer from/to memory */
75 #define HPC3_SBCD_XIE 0x00004000 /* Send IRQ when done with cur buf */
76 #define HPC3_SBCD_EOX 0x00008000 /* Indicates this is last buf in chain */
78 hpcreg ctrl; /* control register */
79 #define HPC3_SCTRL_IRQ 0x01 /* IRQ asserted, either dma done or parity */
80 #define HPC3_SCTRL_ENDIAN 0x02 /* DMA endian mode, 0=big 1=little */
81 #define HPC3_SCTRL_DIR 0x04 /* DMA direction, 1=dev2mem 0=mem2dev */
82 #define HPC3_SCTRL_FLUSH 0x08 /* Tells HPC3 to flush scsi fifos */
83 #define HPC3_SCTRL_ACTIVE 0x10 /* SCSI DMA channel is active */
84 #define HPC3_SCTRL_AMASK 0x20 /* DMA active inhibits PIO */
85 #define HPC3_SCTRL_CRESET 0x40 /* Resets dma channel and external controller */
86 #define HPC3_SCTRL_PERR 0x80 /* Bad parity on HPC3 iface to scsi controller */
88 hpcreg gfptr; /* current GIO fifo ptr */
89 hpcreg dfptr; /* current device fifo ptr */
90 hpcreg dconfig; /* DMA configuration register */
91 #define HPC3_SDCFG_HCLK 0x00001 /* Enable DMA half clock mode */
92 #define HPC3_SDCFG_D1 0x00006 /* Cycles to spend in D1 state */
93 #define HPC3_SDCFG_D2 0x00038 /* Cycles to spend in D2 state */
94 #define HPC3_SDCFG_D3 0x001c0 /* Cycles to spend in D3 state */
95 #define HPC3_SDCFG_HWAT 0x00e00 /* DMA high water mark */
96 #define HPC3_SDCFG_HW 0x01000 /* Enable 16-bit halfword DMA accesses to scsi */
97 #define HPC3_SDCFG_SWAP 0x02000 /* Byte swap all DMA accesses */
98 #define HPC3_SDCFG_EPAR 0x04000 /* Enable parity checking for DMA */
99 #define HPC3_SDCFG_POLL 0x08000 /* hd_dreq polarity control */
100 #define HPC3_SDCFG_ERLY 0x30000 /* hd_dreq behavior control bits */
102 hpcreg pconfig; /* PIO configuration register */
103 #define HPC3_SPCFG_P3 0x0003 /* Cycles to spend in P3 state */
104 #define HPC3_SPCFG_P2W 0x001c /* Cycles to spend in P2 state for writes */
105 #define HPC3_SPCFG_P2R 0x01e0 /* Cycles to spend in P2 state for reads */
106 #define HPC3_SPCFG_P1 0x0e00 /* Cycles to spend in P1 state */
107 #define HPC3_SPCFG_HW 0x1000 /* Enable 16-bit halfword PIO accesses to scsi */
108 #define HPC3_SPCFG_SWAP 0x2000 /* Byte swap all PIO accesses */
109 #define HPC3_SPCFG_EPAR 0x4000 /* Enable parity checking for PIO */
110 #define HPC3_SPCFG_FUJI 0x8000 /* Fujitsu scsi controller mode for faster dma/pio */
112 char _unused2[PAGE_SIZE - (6 * sizeof(hpcreg))]; /* padding */
115 /* SEEQ ethernet HPC3 registers, only one seeq per HPC3. */
116 struct hpc3_ethregs {
117 /* Receiver registers. */
118 hpcreg rx_cbptr; /* current dma buffer ptr, diagnostic use only */
119 hpcreg rx_ndptr; /* next dma descriptor ptr */
120 char _unused1[PAGE_SIZE - (2 * sizeof(hpcreg))]; /* padding */
121 hpcreg rx_bcd; /* byte count info */
122 #define HPC3_ERXBCD_BCNTMSK 0x00003fff /* bytes to be sent to memory */
123 #define HPC3_ERXBCD_XIE 0x20000000 /* HPC3 interrupts cpu at end of this buf */
124 #define HPC3_ERXBCD_EOX 0x80000000 /* flags this as end of descriptor chain */
126 hpcreg rx_ctrl; /* control register */
127 #define HPC3_ERXCTRL_STAT50 0x0000003f /* Receive status reg bits of Seeq8003 */
128 #define HPC3_ERXCTRL_STAT6 0x00000040 /* Rdonly irq status */
129 #define HPC3_ERXCTRL_STAT7 0x00000080 /* Rdonlt old/new status bit from Seeq */
130 #define HPC3_ERXCTRL_ENDIAN 0x00000100 /* Endian for dma channel, little=1 big=0 */
131 #define HPC3_ERXCTRL_ACTIVE 0x00000200 /* Tells if DMA transfer is in progress */
132 #define HPC3_ERXCTRL_AMASK 0x00000400 /* Tells if ACTIVE inhibits PIO's to hpc3 */
133 #define HPC3_ERXCTRL_RBO 0x00000800 /* Receive buffer overflow if set to 1 */
135 hpcreg rx_gfptr; /* current GIO fifo ptr */
136 hpcreg rx_dfptr; /* current device fifo ptr */
137 hpcreg _unused2; /* padding */
138 hpcreg rx_reset; /* reset register */
139 #define HPC3_ERXRST_CRESET 0x1 /* Reset dma channel and external controller */
140 #define HPC3_ERXRST_CLRIRQ 0x2 /* Clear channel interrupt */
141 #define HPC3_ERXRST_LBACK 0x4 /* Enable diagnostic loopback mode of Seeq8003 */
143 hpcreg rx_dconfig; /* DMA configuration register */
144 #define HPC3_ERXDCFG_D1 0x0000f /* Cycles to spend in D1 state for PIO */
145 #define HPC3_ERXDCFG_D2 0x000f0 /* Cycles to spend in D2 state for PIO */
146 #define HPC3_ERXDCFG_D3 0x00f00 /* Cycles to spend in D3 state for PIO */
147 #define HPC3_ERXDCFG_WCTRL 0x01000 /* Enable writes of desc into ex ctrl port */
148 #define HPC3_ERXDCFG_FRXDC 0x02000 /* Clear eop stat bits upon rxdc, hw seeq fix */
149 #define HPC3_ERXDCFG_FEOP 0x04000 /* Bad packet marker timeout enable */
150 #define HPC3_ERXDCFG_FIRQ 0x08000 /* Another bad packet timeout enable */
151 #define HPC3_ERXDCFG_PTO 0x30000 /* Programmed timeout value for above two */
153 hpcreg rx_pconfig; /* PIO configuration register */
154 #define HPC3_ERXPCFG_P1 0x000f /* Cycles to spend in P1 state for PIO */
155 #define HPC3_ERXPCFG_P2 0x00f0 /* Cycles to spend in P2 state for PIO */
156 #define HPC3_ERXPCFG_P3 0x0f00 /* Cycles to spend in P3 state for PIO */
157 #define HPC3_ERXPCFG_TST 0x1000 /* Diagnistic ram test feature bit */
159 char _unused3[PAGE_SIZE - (8 * sizeof(hpcreg))]; /* padding */
161 /* Transmitter registers. */
162 hpcreg tx_cbptr; /* current dma buffer ptr, diagnostic use only */
163 hpcreg tx_ndptr; /* next dma descriptor ptr */
164 char _unused4[PAGE_SIZE - (2 * sizeof(hpcreg))]; /* padding */
165 hpcreg tx_bcd; /* byte count info */
166 #define HPC3_ETXBCD_BCNTMSK 0x00003fff /* bytes to be read from memory */
167 #define HPC3_ETXBCD_ESAMP 0x10000000 /* if set, too late to add descriptor */
168 #define HPC3_ETXBCD_XIE 0x20000000 /* Interrupt cpu at end of cur desc */
169 #define HPC3_ETXBCD_EOP 0x40000000 /* Last byte of cur buf is end of packet */
170 #define HPC3_ETXBCD_EOX 0x80000000 /* This buf is the end of desc chain */
172 hpcreg tx_ctrl; /* control register */
173 #define HPC3_ETXCTRL_STAT30 0x0000000f /* Rdonly copy of seeq tx stat reg */
174 #define HPC3_ETXCTRL_STAT4 0x00000010 /* Indicate late collision occurred */
175 #define HPC3_ETXCTRL_STAT75 0x000000e0 /* Rdonly irq status from seeq */
176 #define HPC3_ETXCTRL_ENDIAN 0x00000100 /* Dma channel endian mode, 1=little 0=big */
177 #define HPC3_ETXCTRL_ACTIVE 0x00000200 /* DMA tx channel is active */
178 #define HPC3_ETXCTRL_AMASK 0x00000400 /* Indicates ACTIVE inhibits PIO's */
180 hpcreg tx_gfptr; /* current GIO fifo ptr */
181 hpcreg tx_dfptr; /* current device fifo ptr */
182 char _unused5[PAGE_SIZE - (4 * sizeof(hpcreg))]; /* padding */
186 /* First regs for the PBUS 8 dma channels. */
187 struct hpc3_pbus_dmacregs pbdma[8];
189 /* Now the HPC scsi registers, we get two scsi reg sets. */
190 struct hpc3_scsiregs scsi_chan0, scsi_chan1;
192 /* The SEEQ hpc3 ethernet dma/control registers. */
193 struct hpc3_ethregs ethregs;
195 /* Here are where the hpc3 fifo's can be directly accessed
196 * via PIO accesses. Under normal operation we never stick
197 * our grubby paws in here so it's just padding.
199 char _unused1[PAGE_SIZE * 24];
201 /* HPC3 irq status regs. Due to a peculiar bug you need to
202 * look at two different register addresses to get at all of
203 * the status bits. The first reg can only reliably report
204 * bits 4:0 of the status, and the second reg can only
205 * reliably report bits 9:5 of the hpc3 irq status. I told
206 * you it was a peculiar bug. ;-)
208 hpcreg istat0; /* Irq status, only bits <4:0> reliable. */
210 #define HPC3_ISTAT_PBIMASK 0x0ff /* irq bits for pbus devs 0 --> 7 */
211 #define HPC3_ISTAT_SC0MASK 0x100 /* irq bit for scsi channel 0 */
212 #define HPC3_ISTAT_SC1MASK 0x200 /* irq bit for scsi channel 1 */
214 hpcreg gio64_misc; /* GIO64 misc control bits. */
215 #define HPC3_GIOMISC_ERTIME 0x1 /* Enable external timer real time. */
216 #define HPC3_GIOMISC_DENDIAN 0x2 /* dma descriptor endian, 1=lit 0=big */
218 hpcreg eeprom_data; /* EEPROM data reg. */
219 #define HPC3_EEPROM_EPROT 0x01 /* Protect register enable */
220 #define HPC3_EEPROM_CSEL 0x02 /* Chip select */
221 #define HPC3_EEPROM_ECLK 0x04 /* EEPROM clock */
222 #define HPC3_EEPROM_DATO 0x08 /* Data out */
223 #define HPC3_EEPROM_DATI 0x10 /* Data in */
225 hpcreg istat1; /* Irq status, only bits <9:5> reliable. */
226 hpcreg gio64_estat; /* GIO64 error interrupt status reg. */
227 #define HPC3_GIOESTAT_BLMASK 0x000ff /* Bus lane where bad parity occurred */
228 #define HPC3_GIOESTAT_CTYPE 0x00100 /* Bus cycle type, 0=PIO 1=DMA */
229 #define HPC3_GIOESTAT_PIDMSK 0x3f700 /* DMA channel parity identifier */
231 /* Now direct PIO per-HPC3 peripheral access to external regs. */
232 char _unused2[0x13fec]; /* Trust me... */
233 hpcreg scsi0_ext[256]; /* SCSI channel 0 external regs */
234 char _unused3[0x07c00]; /* Trust me... */
235 hpcreg scsi1_ext[256]; /* SCSI channel 1 external regs */
236 char _unused4[0x07c00]; /* It'll only hurt a little... */
238 /* Ethernet external registers. Noone use them so we need some
241 char _unused5[0x04000]; /* It'll hurt a lot if you leave this out */
243 /* Per-peripheral device external registers and dma/pio control. */
244 hpcreg pbus_extregs[16][256]; /* 2nd indice indexes controller */
245 hpcreg pbus_dmacfgs[8][128]; /* 2nd indice indexes controller */
246 #define HPC3_PIODCFG_D3R 0x00000001 /* Cycles to spend in D3 for reads */
247 #define HPC3_PIODCFG_D4R 0x0000001e /* Cycles to spend in D4 for reads */
248 #define HPC3_PIODCFG_D5R 0x000001e0 /* Cycles to spend in D5 for reads */
249 #define HPC3_PIODCFG_D3W 0x00000200 /* Cycles to spend in D3 for writes */
250 #define HPC3_PIODCFG_D4W 0x00003c00 /* Cycles to spend in D4 for writes */
251 #define HPC3_PIODCFG_D5W 0x0003c000 /* Cycles to spend in D5 for writes */
252 #define HPC3_PIODCFG_HWORD 0x00040000 /* Enable 16-bit dma access mode */
253 #define HPC3_PIODCFG_EHI 0x00080000 /* Places halfwords on high 16 bits of bus */
254 #define HPC3_PIODCFG_RTIME 0x00200000 /* Make this device real time on GIO bus */
255 #define HPC3_PIODCFG_BURST 0x07c00000 /* 5 bit burst count for DMA device */
256 #define HPC3_PIODCFG_DRQLV 0x08000000 /* Use live pbus_dreq unsynchronized signal */
258 hpcreg pbus_piocfgs[64][10]; /* 2nd indice indexes controller */
259 #define HPC3_PIOPCFG_RP2 0x00001 /* Cycles to spend in P2 state for reads */
260 #define HPC3_PIOPCFG_RP3 0x0001e /* Cycles to spend in P3 state for reads */
261 #define HPC3_PIOPCFG_RP4 0x001e0 /* Cycles to spend in P4 state for reads */
262 #define HPC3_PIOPCFG_WP2 0x00200 /* Cycles to spend in P2 state for writes */
263 #define HPC3_PIOPCFG_WP3 0x03c00 /* Cycles to spend in P3 state for writes */
264 #define HPC3_PIOPCFG_WP4 0x3c000 /* Cycles to spend in P4 state for writes */
265 #define HPC3_PIOPCFG_HW 0x40000 /* Enable 16-bit PIO accesses */
266 #define HPC3_PIOPCFG_EHI 0x80000 /* Place even address bits in bits <15:8> */
268 /* PBUS PROM control regs. */
269 hpcreg pbus_promwe; /* PROM write enable register */
270 #define HPC3_PROM_WENAB 0x1 /* Enable writes to the PROM */
272 char _unused6[0x800 - sizeof(hpcreg)];
273 hpcreg pbus_promswap; /* Chip select swap reg */
274 #define HPC3_PROM_SWAP 0x1 /* invert GIO addr bit to select prom0 or prom1 */
276 char _unused7[0x800 - sizeof(hpcreg)];
277 hpcreg pbus_gout; /* PROM general purpose output reg */
278 #define HPC3_PROM_STAT 0x1 /* General purpose status bit in gout */
280 char _unused8[0x1000 - sizeof(hpcreg)];
281 hpcreg pbus_promram[16384]; /* 64k of PROM battery backed ram */
284 /* It is possible to have two HPC3's within the address space on
285 * one machine, though only having one is more likely on an INDY.
286 * Controller 0 lives at physical address 0x1fb80000 and the controller
287 * 1 if present lives at address 0x1fb00000.
289 extern struct hpc3_regs *hpc3c0, *hpc3c1;
290 #define HPC3_CHIP0_PBASE 0x1fb80000 /* physical */
291 #define HPC3_CHIP1_PBASE 0x1fb00000 /* physical */
293 /* Control and misc status information, these live in pbus channel 6. */
294 struct hpc3_miscregs {
295 hpcreg pdata, pctrl, pstat, pdmactrl, pistat, pimask;
296 hpcreg ptimer1, ptimer2, ptimer3, ptimer4;
298 hpcreg ser1cmd, ser1data;
299 hpcreg ser0cmd, ser0data;
300 hpcreg kbdmouse0, kbdmouse1;
301 hpcreg gcsel, genctrl, panel;
305 hpcreg read, _unused4;
307 #define HPC3_DSELECT_SCLK10MHZ 0x00 /* use 10MHZ serial clock */
308 #define HPC3_DSELECT_ISDNB 0x01 /* enable isdn B */
309 #define HPC3_DSELECT_ISDNA 0x02 /* enable isdn A */
310 #define HPC3_DSELECT_LPR 0x04 /* use parallel DMA */
311 #define HPC3_DSELECT_SCLK667MHZ 0x10 /* use 6.67MHZ serial clock */
312 #define HPC3_DSELECT_SCLKEXT 0x20 /* use external serial clock */
316 #define HPC3_WRITE1_PRESET 0x01 /* 0=LPR_RESET, 1=NORMAL */
317 #define HPC3_WRITE1_KMRESET 0x02 /* 0=KBDMOUSE_RESET, 1=NORMAL */
318 #define HPC3_WRITE1_ERESET 0x04 /* 0=EISA_RESET, 1=NORMAL */
319 #define HPC3_WRITE1_GRESET 0x08 /* 0=MAGIC_GIO_RESET, 1=NORMAL */
320 #define HPC3_WRITE1_LC0OFF 0x10 /* turn led off (guiness=red, else green) */
321 #define HPC3_WRITE1_LC1OFF 0x20 /* turn led off (guiness=green, else amber) */
325 #define HPC3_WRITE2_NTHRESH 0x01 /* use 4.5db threshhold */
326 #define HPC3_WRITE2_TPSPEED 0x02 /* use 100ohm TP speed */
327 #define HPC3_WRITE2_EPSEL 0x04 /* force cable mode: 1=AUI 0=TP */
328 #define HPC3_WRITE2_EASEL 0x08 /* 1=autoselect 0=manual cable selection */
329 #define HPC3_WRITE2_U1AMODE 0x10 /* 1=PC 0=MAC UART mode */
330 #define HPC3_WRITE2_U0AMODE 0x20 /* 1=PC 0=MAC UART mode */
331 #define HPC3_WRITE2_MLO 0x40 /* 1=4.75V 0=+5V */
332 #define HPC3_WRITE2_MHI 0x80 /* 1=5.25V 0=+5V */
334 extern struct hpc3_miscregs *hpc3mregs;
335 #define HPC3_MREGS_PBASE 0x1fbd9800 /* physical */
337 /* We need software copies of these because they are write only. */
338 extern unsigned int sgi_hpc_write1, sgi_hpc_write2;
342 unsigned char _unused0[3];
343 volatile unsigned char data;
344 unsigned char _unused1[3];
345 volatile unsigned char command;
347 volatile unsigned char data;
348 unsigned char _unused0[3];
349 volatile unsigned char command;
350 unsigned char _unused1[3];
356 /* The layout of registers for the INDY Dallas 1286 clock chipset. */
358 volatile unsigned int hsec;
359 volatile unsigned int sec;
360 volatile unsigned int min;
361 volatile unsigned int malarm;
362 volatile unsigned int hr;
363 volatile unsigned int halarm;
364 volatile unsigned int day;
365 volatile unsigned int dalarm;
366 volatile unsigned int date;
367 volatile unsigned int month;
368 volatile unsigned int year;
369 volatile unsigned int cmd;
370 volatile unsigned int whsec;
371 volatile unsigned int wsec;
372 volatile unsigned int _unused0[50];
375 #define INDY_CLOCK_REGS (KSEG1ADDR(0x1fbe0000))
377 extern void sgihpc_init(void);
379 #endif /* __ASM_SGI_SGIHPC_H */