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sunhme.h
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1 /* $Id: sunhme.h,v 1.33 2001/08/03 06:23:04 davem Exp $
2  * sunhme.h: Definitions for Sparc HME/BigMac 10/100baseT ethernet driver.
3  * Also known as the "Happy Meal".
4  *
5  * Copyright (C) 1996, 1999 David S. Miller ([email protected])
6  */
7 
8 #ifndef _SUNHME_H
9 #define _SUNHME_H
10 
11 #include <linux/pci.h>
12 
13 /* Happy Meal global registers. */
14 #define GREG_SWRESET 0x000UL /* Software Reset */
15 #define GREG_CFG 0x004UL /* Config Register */
16 #define GREG_STAT 0x108UL /* Status */
17 #define GREG_IMASK 0x10cUL /* Interrupt Mask */
18 #define GREG_REG_SIZE 0x110UL
19 
20 /* Global reset register. */
21 #define GREG_RESET_ETX 0x01
22 #define GREG_RESET_ERX 0x02
23 #define GREG_RESET_ALL 0x03
24 
25 /* Global config register. */
26 #define GREG_CFG_BURSTMSK 0x03
27 #define GREG_CFG_BURST16 0x00
28 #define GREG_CFG_BURST32 0x01
29 #define GREG_CFG_BURST64 0x02
30 #define GREG_CFG_64BIT 0x04
31 #define GREG_CFG_PARITY 0x08
32 #define GREG_CFG_RESV 0x10
33 
34 /* Global status register. */
35 #define GREG_STAT_GOTFRAME 0x00000001 /* Received a frame */
36 #define GREG_STAT_RCNTEXP 0x00000002 /* Receive frame counter expired */
37 #define GREG_STAT_ACNTEXP 0x00000004 /* Align-error counter expired */
38 #define GREG_STAT_CCNTEXP 0x00000008 /* CRC-error counter expired */
39 #define GREG_STAT_LCNTEXP 0x00000010 /* Length-error counter expired */
40 #define GREG_STAT_RFIFOVF 0x00000020 /* Receive FIFO overflow */
41 #define GREG_STAT_CVCNTEXP 0x00000040 /* Code-violation counter expired */
42 #define GREG_STAT_STSTERR 0x00000080 /* Test error in XIF for SQE */
43 #define GREG_STAT_SENTFRAME 0x00000100 /* Transmitted a frame */
44 #define GREG_STAT_TFIFO_UND 0x00000200 /* Transmit FIFO underrun */
45 #define GREG_STAT_MAXPKTERR 0x00000400 /* Max-packet size error */
46 #define GREG_STAT_NCNTEXP 0x00000800 /* Normal-collision counter expired */
47 #define GREG_STAT_ECNTEXP 0x00001000 /* Excess-collision counter expired */
48 #define GREG_STAT_LCCNTEXP 0x00002000 /* Late-collision counter expired */
49 #define GREG_STAT_FCNTEXP 0x00004000 /* First-collision counter expired */
50 #define GREG_STAT_DTIMEXP 0x00008000 /* Defer-timer expired */
51 #define GREG_STAT_RXTOHOST 0x00010000 /* Moved from receive-FIFO to host memory */
52 #define GREG_STAT_NORXD 0x00020000 /* No more receive descriptors */
53 #define GREG_STAT_RXERR 0x00040000 /* Error during receive dma */
54 #define GREG_STAT_RXLATERR 0x00080000 /* Late error during receive dma */
55 #define GREG_STAT_RXPERR 0x00100000 /* Parity error during receive dma */
56 #define GREG_STAT_RXTERR 0x00200000 /* Tag error during receive dma */
57 #define GREG_STAT_EOPERR 0x00400000 /* Transmit descriptor did not have EOP set */
58 #define GREG_STAT_MIFIRQ 0x00800000 /* MIF is signaling an interrupt condition */
59 #define GREG_STAT_HOSTTOTX 0x01000000 /* Moved from host memory to transmit-FIFO */
60 #define GREG_STAT_TXALL 0x02000000 /* Transmitted all packets in the tx-fifo */
61 #define GREG_STAT_TXEACK 0x04000000 /* Error during transmit dma */
62 #define GREG_STAT_TXLERR 0x08000000 /* Late error during transmit dma */
63 #define GREG_STAT_TXPERR 0x10000000 /* Parity error during transmit dma */
64 #define GREG_STAT_TXTERR 0x20000000 /* Tag error during transmit dma */
65 #define GREG_STAT_SLVERR 0x40000000 /* PIO access got an error */
66 #define GREG_STAT_SLVPERR 0x80000000 /* PIO access got a parity error */
67 
68 /* All interesting error conditions. */
69 #define GREG_STAT_ERRORS 0xfc7efefc
70 
71 /* Global interrupt mask register. */
72 #define GREG_IMASK_GOTFRAME 0x00000001 /* Received a frame */
73 #define GREG_IMASK_RCNTEXP 0x00000002 /* Receive frame counter expired */
74 #define GREG_IMASK_ACNTEXP 0x00000004 /* Align-error counter expired */
75 #define GREG_IMASK_CCNTEXP 0x00000008 /* CRC-error counter expired */
76 #define GREG_IMASK_LCNTEXP 0x00000010 /* Length-error counter expired */
77 #define GREG_IMASK_RFIFOVF 0x00000020 /* Receive FIFO overflow */
78 #define GREG_IMASK_CVCNTEXP 0x00000040 /* Code-violation counter expired */
79 #define GREG_IMASK_STSTERR 0x00000080 /* Test error in XIF for SQE */
80 #define GREG_IMASK_SENTFRAME 0x00000100 /* Transmitted a frame */
81 #define GREG_IMASK_TFIFO_UND 0x00000200 /* Transmit FIFO underrun */
82 #define GREG_IMASK_MAXPKTERR 0x00000400 /* Max-packet size error */
83 #define GREG_IMASK_NCNTEXP 0x00000800 /* Normal-collision counter expired */
84 #define GREG_IMASK_ECNTEXP 0x00001000 /* Excess-collision counter expired */
85 #define GREG_IMASK_LCCNTEXP 0x00002000 /* Late-collision counter expired */
86 #define GREG_IMASK_FCNTEXP 0x00004000 /* First-collision counter expired */
87 #define GREG_IMASK_DTIMEXP 0x00008000 /* Defer-timer expired */
88 #define GREG_IMASK_RXTOHOST 0x00010000 /* Moved from receive-FIFO to host memory */
89 #define GREG_IMASK_NORXD 0x00020000 /* No more receive descriptors */
90 #define GREG_IMASK_RXERR 0x00040000 /* Error during receive dma */
91 #define GREG_IMASK_RXLATERR 0x00080000 /* Late error during receive dma */
92 #define GREG_IMASK_RXPERR 0x00100000 /* Parity error during receive dma */
93 #define GREG_IMASK_RXTERR 0x00200000 /* Tag error during receive dma */
94 #define GREG_IMASK_EOPERR 0x00400000 /* Transmit descriptor did not have EOP set */
95 #define GREG_IMASK_MIFIRQ 0x00800000 /* MIF is signaling an interrupt condition */
96 #define GREG_IMASK_HOSTTOTX 0x01000000 /* Moved from host memory to transmit-FIFO */
97 #define GREG_IMASK_TXALL 0x02000000 /* Transmitted all packets in the tx-fifo */
98 #define GREG_IMASK_TXEACK 0x04000000 /* Error during transmit dma */
99 #define GREG_IMASK_TXLERR 0x08000000 /* Late error during transmit dma */
100 #define GREG_IMASK_TXPERR 0x10000000 /* Parity error during transmit dma */
101 #define GREG_IMASK_TXTERR 0x20000000 /* Tag error during transmit dma */
102 #define GREG_IMASK_SLVERR 0x40000000 /* PIO access got an error */
103 #define GREG_IMASK_SLVPERR 0x80000000 /* PIO access got a parity error */
104 
105 /* Happy Meal external transmitter registers. */
106 #define ETX_PENDING 0x00UL /* Transmit pending/wakeup register */
107 #define ETX_CFG 0x04UL /* Transmit config register */
108 #define ETX_RING 0x08UL /* Transmit ring pointer */
109 #define ETX_BBASE 0x0cUL /* Transmit buffer base */
110 #define ETX_BDISP 0x10UL /* Transmit buffer displacement */
111 #define ETX_FIFOWPTR 0x14UL /* FIFO write ptr */
112 #define ETX_FIFOSWPTR 0x18UL /* FIFO write ptr (shadow register) */
113 #define ETX_FIFORPTR 0x1cUL /* FIFO read ptr */
114 #define ETX_FIFOSRPTR 0x20UL /* FIFO read ptr (shadow register) */
115 #define ETX_FIFOPCNT 0x24UL /* FIFO packet counter */
116 #define ETX_SMACHINE 0x28UL /* Transmitter state machine */
117 #define ETX_RSIZE 0x2cUL /* Ring descriptor size */
118 #define ETX_BPTR 0x30UL /* Transmit data buffer ptr */
119 #define ETX_REG_SIZE 0x34UL
120 
121 /* ETX transmit pending register. */
122 #define ETX_TP_DMAWAKEUP 0x00000001 /* Restart transmit dma */
123 
124 /* ETX config register. */
125 #define ETX_CFG_DMAENABLE 0x00000001 /* Enable transmit dma */
126 #define ETX_CFG_FIFOTHRESH 0x000003fe /* Transmit FIFO threshold */
127 #define ETX_CFG_IRQDAFTER 0x00000400 /* Interrupt after TX-FIFO drained */
128 #define ETX_CFG_IRQDBEFORE 0x00000000 /* Interrupt before TX-FIFO drained */
129 
130 #define ETX_RSIZE_SHIFT 4
131 
132 /* Happy Meal external receiver registers. */
133 #define ERX_CFG 0x00UL /* Receiver config register */
134 #define ERX_RING 0x04UL /* Receiver ring ptr */
135 #define ERX_BPTR 0x08UL /* Receiver buffer ptr */
136 #define ERX_FIFOWPTR 0x0cUL /* FIFO write ptr */
137 #define ERX_FIFOSWPTR 0x10UL /* FIFO write ptr (shadow register) */
138 #define ERX_FIFORPTR 0x14UL /* FIFO read ptr */
139 #define ERX_FIFOSRPTR 0x18UL /* FIFO read ptr (shadow register) */
140 #define ERX_SMACHINE 0x1cUL /* Receiver state machine */
141 #define ERX_REG_SIZE 0x20UL
142 
143 /* ERX config register. */
144 #define ERX_CFG_DMAENABLE 0x00000001 /* Enable receive DMA */
145 #define ERX_CFG_RESV1 0x00000006 /* Unused... */
146 #define ERX_CFG_BYTEOFFSET 0x00000038 /* Receive first byte offset */
147 #define ERX_CFG_RESV2 0x000001c0 /* Unused... */
148 #define ERX_CFG_SIZE32 0x00000000 /* Receive ring size == 32 */
149 #define ERX_CFG_SIZE64 0x00000200 /* Receive ring size == 64 */
150 #define ERX_CFG_SIZE128 0x00000400 /* Receive ring size == 128 */
151 #define ERX_CFG_SIZE256 0x00000600 /* Receive ring size == 256 */
152 #define ERX_CFG_RESV3 0x0000f800 /* Unused... */
153 #define ERX_CFG_CSUMSTART 0x007f0000 /* Offset of checksum start,
154  * in halfwords. */
155 
156 /* I'd like a Big Mac, small fries, small coke, and SparcLinux please. */
157 #define BMAC_XIFCFG 0x0000UL /* XIF config register */
158  /* 0x4-->0x204, reserved */
159 #define BMAC_TXSWRESET 0x208UL /* Transmitter software reset */
160 #define BMAC_TXCFG 0x20cUL /* Transmitter config register */
161 #define BMAC_IGAP1 0x210UL /* Inter-packet gap 1 */
162 #define BMAC_IGAP2 0x214UL /* Inter-packet gap 2 */
163 #define BMAC_ALIMIT 0x218UL /* Transmit attempt limit */
164 #define BMAC_STIME 0x21cUL /* Transmit slot time */
165 #define BMAC_PLEN 0x220UL /* Size of transmit preamble */
166 #define BMAC_PPAT 0x224UL /* Pattern for transmit preamble */
167 #define BMAC_TXSDELIM 0x228UL /* Transmit delimiter */
168 #define BMAC_JSIZE 0x22cUL /* Jam size */
169 #define BMAC_TXMAX 0x230UL /* Transmit max pkt size */
170 #define BMAC_TXMIN 0x234UL /* Transmit min pkt size */
171 #define BMAC_PATTEMPT 0x238UL /* Count of transmit peak attempts */
172 #define BMAC_DTCTR 0x23cUL /* Transmit defer timer */
173 #define BMAC_NCCTR 0x240UL /* Transmit normal-collision counter */
174 #define BMAC_FCCTR 0x244UL /* Transmit first-collision counter */
175 #define BMAC_EXCTR 0x248UL /* Transmit excess-collision counter */
176 #define BMAC_LTCTR 0x24cUL /* Transmit late-collision counter */
177 #define BMAC_RSEED 0x250UL /* Transmit random number seed */
178 #define BMAC_TXSMACHINE 0x254UL /* Transmit state machine */
179  /* 0x258-->0x304, reserved */
180 #define BMAC_RXSWRESET 0x308UL /* Receiver software reset */
181 #define BMAC_RXCFG 0x30cUL /* Receiver config register */
182 #define BMAC_RXMAX 0x310UL /* Receive max pkt size */
183 #define BMAC_RXMIN 0x314UL /* Receive min pkt size */
184 #define BMAC_MACADDR2 0x318UL /* Ether address register 2 */
185 #define BMAC_MACADDR1 0x31cUL /* Ether address register 1 */
186 #define BMAC_MACADDR0 0x320UL /* Ether address register 0 */
187 #define BMAC_FRCTR 0x324UL /* Receive frame receive counter */
188 #define BMAC_GLECTR 0x328UL /* Receive giant-length error counter */
189 #define BMAC_UNALECTR 0x32cUL /* Receive unaligned error counter */
190 #define BMAC_RCRCECTR 0x330UL /* Receive CRC error counter */
191 #define BMAC_RXSMACHINE 0x334UL /* Receiver state machine */
192 #define BMAC_RXCVALID 0x338UL /* Receiver code violation */
193  /* 0x33c, reserved */
194 #define BMAC_HTABLE3 0x340UL /* Hash table 3 */
195 #define BMAC_HTABLE2 0x344UL /* Hash table 2 */
196 #define BMAC_HTABLE1 0x348UL /* Hash table 1 */
197 #define BMAC_HTABLE0 0x34cUL /* Hash table 0 */
198 #define BMAC_AFILTER2 0x350UL /* Address filter 2 */
199 #define BMAC_AFILTER1 0x354UL /* Address filter 1 */
200 #define BMAC_AFILTER0 0x358UL /* Address filter 0 */
201 #define BMAC_AFMASK 0x35cUL /* Address filter mask */
202 #define BMAC_REG_SIZE 0x360UL
203 
204 /* BigMac XIF config register. */
205 #define BIGMAC_XCFG_ODENABLE 0x00000001 /* Output driver enable */
206 #define BIGMAC_XCFG_XLBACK 0x00000002 /* Loopback-mode XIF enable */
207 #define BIGMAC_XCFG_MLBACK 0x00000004 /* Loopback-mode MII enable */
208 #define BIGMAC_XCFG_MIIDISAB 0x00000008 /* MII receive buffer disable */
209 #define BIGMAC_XCFG_SQENABLE 0x00000010 /* SQE test enable */
210 #define BIGMAC_XCFG_SQETWIN 0x000003e0 /* SQE time window */
211 #define BIGMAC_XCFG_LANCE 0x00000010 /* Lance mode enable */
212 #define BIGMAC_XCFG_LIPG0 0x000003e0 /* Lance mode IPG0 */
213 
214 /* BigMac transmit config register. */
215 #define BIGMAC_TXCFG_ENABLE 0x00000001 /* Enable the transmitter */
216 #define BIGMAC_TXCFG_SMODE 0x00000020 /* Enable slow transmit mode */
217 #define BIGMAC_TXCFG_CIGN 0x00000040 /* Ignore transmit collisions */
218 #define BIGMAC_TXCFG_FCSOFF 0x00000080 /* Do not emit FCS */
219 #define BIGMAC_TXCFG_DBACKOFF 0x00000100 /* Disable backoff */
220 #define BIGMAC_TXCFG_FULLDPLX 0x00000200 /* Enable full-duplex */
221 #define BIGMAC_TXCFG_DGIVEUP 0x00000400 /* Don't give up on transmits */
222 
223 /* BigMac receive config register. */
224 #define BIGMAC_RXCFG_ENABLE 0x00000001 /* Enable the receiver */
225 #define BIGMAC_RXCFG_PSTRIP 0x00000020 /* Pad byte strip enable */
226 #define BIGMAC_RXCFG_PMISC 0x00000040 /* Enable promiscuous mode */
227 #define BIGMAC_RXCFG_DERR 0x00000080 /* Disable error checking */
228 #define BIGMAC_RXCFG_DCRCS 0x00000100 /* Disable CRC stripping */
229 #define BIGMAC_RXCFG_REJME 0x00000200 /* Reject packets addressed to me */
230 #define BIGMAC_RXCFG_PGRP 0x00000400 /* Enable promisc group mode */
231 #define BIGMAC_RXCFG_HENABLE 0x00000800 /* Enable the hash filter */
232 #define BIGMAC_RXCFG_AENABLE 0x00001000 /* Enable the address filter */
233 
234 /* These are the "Management Interface" (ie. MIF) registers of the transceiver. */
235 #define TCVR_BBCLOCK 0x00UL /* Bit bang clock register */
236 #define TCVR_BBDATA 0x04UL /* Bit bang data register */
237 #define TCVR_BBOENAB 0x08UL /* Bit bang output enable */
238 #define TCVR_FRAME 0x0cUL /* Frame control/data register */
239 #define TCVR_CFG 0x10UL /* MIF config register */
240 #define TCVR_IMASK 0x14UL /* MIF interrupt mask */
241 #define TCVR_STATUS 0x18UL /* MIF status */
242 #define TCVR_SMACHINE 0x1cUL /* MIF state machine */
243 #define TCVR_REG_SIZE 0x20UL
244 
245 /* Frame commands. */
246 #define FRAME_WRITE 0x50020000
247 #define FRAME_READ 0x60020000
248 
249 /* Transceiver config register */
250 #define TCV_CFG_PSELECT 0x00000001 /* Select PHY */
251 #define TCV_CFG_PENABLE 0x00000002 /* Enable MIF polling */
252 #define TCV_CFG_BENABLE 0x00000004 /* Enable the "bit banger" oh baby */
253 #define TCV_CFG_PREGADDR 0x000000f8 /* Address of poll register */
254 #define TCV_CFG_MDIO0 0x00000100 /* MDIO zero, data/attached */
255 #define TCV_CFG_MDIO1 0x00000200 /* MDIO one, data/attached */
256 #define TCV_CFG_PDADDR 0x00007c00 /* Device PHY address polling */
257 
258 /* Here are some PHY addresses. */
259 #define TCV_PADDR_ETX 0 /* Internal transceiver */
260 #define TCV_PADDR_ITX 1 /* External transceiver */
261 
262 /* Transceiver status register */
263 #define TCV_STAT_BASIC 0xffff0000 /* The "basic" part */
264 #define TCV_STAT_NORMAL 0x0000ffff /* The "non-basic" part */
265 
266 /* Inside the Happy Meal transceiver is the physical layer, they use an
267  * implementations for National Semiconductor, part number DP83840VCE.
268  * You can retrieve the data sheets and programming docs for this beast
269  * from http://www.national.com/
270  *
271  * The DP83840 is capable of both 10 and 100Mbps ethernet, in both
272  * half and full duplex mode. It also supports auto negotiation.
273  *
274  * But.... THIS THING IS A PAIN IN THE ASS TO PROGRAM!
275  * Debugging eeprom burnt code is more fun than programming this chip!
276  */
277 
278 /* Generic MII registers defined in linux/mii.h, these below
279  * are DP83840 specific.
280  */
281 #define DP83840_CSCONFIG 0x17 /* CS configuration */
282 
283 /* The Carrier Sense config register. */
284 #define CSCONFIG_RESV1 0x0001 /* Unused... */
285 #define CSCONFIG_LED4 0x0002 /* Pin for full-dplx LED4 */
286 #define CSCONFIG_LED1 0x0004 /* Pin for conn-status LED1 */
287 #define CSCONFIG_RESV2 0x0008 /* Unused... */
288 #define CSCONFIG_TCVDISAB 0x0010 /* Turns off the transceiver */
289 #define CSCONFIG_DFBYPASS 0x0020 /* Bypass disconnect function */
290 #define CSCONFIG_GLFORCE 0x0040 /* Good link force for 100mbps */
291 #define CSCONFIG_CLKTRISTATE 0x0080 /* Tristate 25m clock */
292 #define CSCONFIG_RESV3 0x0700 /* Unused... */
293 #define CSCONFIG_ENCODE 0x0800 /* 1=MLT-3, 0=binary */
294 #define CSCONFIG_RENABLE 0x1000 /* Repeater mode enable */
295 #define CSCONFIG_TCDISABLE 0x2000 /* Disable timeout counter */
296 #define CSCONFIG_RESV4 0x4000 /* Unused... */
297 #define CSCONFIG_NDISABLE 0x8000 /* Disable NRZI */
298 
299 /* Happy Meal descriptor rings and such.
300  * All descriptor rings must be aligned on a 2K boundary.
301  * All receive buffers must be 64 byte aligned.
302  * Always write the address first before setting the ownership
303  * bits to avoid races with the hardware scanning the ring.
304  */
305 typedef u32 __bitwise__ hme32;
306 
307 struct happy_meal_rxd {
308  hme32 rx_flags;
309  hme32 rx_addr;
310 };
311 
312 #define RXFLAG_OWN 0x80000000 /* 1 = hardware, 0 = software */
313 #define RXFLAG_OVERFLOW 0x40000000 /* 1 = buffer overflow */
314 #define RXFLAG_SIZE 0x3fff0000 /* Size of the buffer */
315 #define RXFLAG_CSUM 0x0000ffff /* HW computed checksum */
316 
317 struct happy_meal_txd {
318  hme32 tx_flags;
319  hme32 tx_addr;
320 };
321 
322 #define TXFLAG_OWN 0x80000000 /* 1 = hardware, 0 = software */
323 #define TXFLAG_SOP 0x40000000 /* 1 = start of packet */
324 #define TXFLAG_EOP 0x20000000 /* 1 = end of packet */
325 #define TXFLAG_CSENABLE 0x10000000 /* 1 = enable hw-checksums */
326 #define TXFLAG_CSLOCATION 0x0ff00000 /* Where to stick the csum */
327 #define TXFLAG_CSBUFBEGIN 0x000fc000 /* Where to begin checksum */
328 #define TXFLAG_SIZE 0x00003fff /* Size of the packet */
329 
330 #define TX_RING_SIZE 32 /* Must be >16 and <255, multiple of 16 */
331 #define RX_RING_SIZE 32 /* see ERX_CFG_SIZE* for possible values */
332 
333 #if (TX_RING_SIZE < 16 || TX_RING_SIZE > 256 || (TX_RING_SIZE % 16) != 0)
334 #error TX_RING_SIZE holds illegal value
335 #endif
336 
337 #define TX_RING_MAXSIZE 256
338 #define RX_RING_MAXSIZE 256
339 
340 /* We use a 14 byte offset for checksum computation. */
341 #if (RX_RING_SIZE == 32)
342 #define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE32|((14/2)<<16))
343 #else
344 #if (RX_RING_SIZE == 64)
345 #define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE64|((14/2)<<16))
346 #else
347 #if (RX_RING_SIZE == 128)
348 #define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE128|((14/2)<<16))
349 #else
350 #if (RX_RING_SIZE == 256)
351 #define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE256|((14/2)<<16))
352 #else
353 #error RX_RING_SIZE holds illegal value
354 #endif
355 #endif
356 #endif
357 #endif
358 
359 #define NEXT_RX(num) (((num) + 1) & (RX_RING_SIZE - 1))
360 #define NEXT_TX(num) (((num) + 1) & (TX_RING_SIZE - 1))
361 #define PREV_RX(num) (((num) - 1) & (RX_RING_SIZE - 1))
362 #define PREV_TX(num) (((num) - 1) & (TX_RING_SIZE - 1))
363 
364 #define TX_BUFFS_AVAIL(hp) \
365  (((hp)->tx_old <= (hp)->tx_new) ? \
366  (hp)->tx_old + (TX_RING_SIZE - 1) - (hp)->tx_new : \
367  (hp)->tx_old - (hp)->tx_new - 1)
368 
369 #define RX_OFFSET 2
370 #define RX_BUF_ALLOC_SIZE (1546 + RX_OFFSET + 64)
371 
372 #define RX_COPY_THRESHOLD 256
373 
374 struct hmeal_init_block {
375  struct happy_meal_rxd happy_meal_rxd[RX_RING_MAXSIZE];
376  struct happy_meal_txd happy_meal_txd[TX_RING_MAXSIZE];
377 };
378 
379 #define hblock_offset(mem, elem) \
380 ((__u32)((unsigned long)(&(((struct hmeal_init_block *)0)->mem[elem]))))
381 
382 /* Now software state stuff. */
383 enum happy_transceiver {
384  external = 0,
385  internal = 1,
386  none = 2,
387 };
388 
389 /* Timer state engine. */
390 enum happy_timer_state {
391  arbwait = 0, /* Waiting for auto negotiation to complete. */
392  lupwait = 1, /* Auto-neg complete, awaiting link-up status. */
393  ltrywait = 2, /* Forcing try of all modes, from fastest to slowest. */
394  asleep = 3, /* Time inactive. */
395 };
396 
397 struct quattro;
398 
399 /* Happy happy, joy joy! */
400 struct happy_meal {
401  void __iomem *gregs; /* Happy meal global registers */
402  struct hmeal_init_block *happy_block; /* RX and TX descriptors (CPU addr) */
403 
404 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
405  u32 (*read_desc32)(hme32 *);
406  void (*write_txd)(struct happy_meal_txd *, u32, u32);
407  void (*write_rxd)(struct happy_meal_rxd *, u32, u32);
408 #endif
409 
410  /* This is either an platform_device or a pci_dev. */
411  void *happy_dev;
412  struct device *dma_dev;
413 
414  spinlock_t happy_lock;
415 
416  struct sk_buff *rx_skbs[RX_RING_SIZE];
417  struct sk_buff *tx_skbs[TX_RING_SIZE];
418 
419  int rx_new, tx_new, rx_old, tx_old;
420 
421  struct net_device_stats net_stats; /* Statistical counters */
422 
423 #if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
424  u32 (*read32)(void __iomem *);
425  void (*write32)(void __iomem *, u32);
426 #endif
427 
428  void __iomem *etxregs; /* External transmitter regs */
429  void __iomem *erxregs; /* External receiver regs */
430  void __iomem *bigmacregs; /* BIGMAC core regs */
431  void __iomem *tcvregs; /* MIF transceiver regs */
432 
433  dma_addr_t hblock_dvma; /* DVMA visible address happy block */
434  unsigned int happy_flags; /* Driver state flags */
435  int irq;
436  enum happy_transceiver tcvr_type; /* Kind of transceiver in use */
437  unsigned int happy_bursts; /* Get your mind out of the gutter */
438  unsigned int paddr; /* PHY address for transceiver */
439  unsigned short hm_revision; /* Happy meal revision */
440  unsigned short sw_bmcr; /* SW copy of BMCR */
441  unsigned short sw_bmsr; /* SW copy of BMSR */
442  unsigned short sw_physid1; /* SW copy of PHYSID1 */
443  unsigned short sw_physid2; /* SW copy of PHYSID2 */
444  unsigned short sw_advertise; /* SW copy of ADVERTISE */
445  unsigned short sw_lpa; /* SW copy of LPA */
446  unsigned short sw_expansion; /* SW copy of EXPANSION */
447  unsigned short sw_csconfig; /* SW copy of CSCONFIG */
448  unsigned int auto_speed; /* Auto-nego link speed */
449  unsigned int forced_speed; /* Force mode link speed */
450  unsigned int poll_data; /* MIF poll data */
451  unsigned int poll_flag; /* MIF poll flag */
452  unsigned int linkcheck; /* Have we checked the link yet? */
453  unsigned int lnkup; /* Is the link up as far as we know? */
454  unsigned int lnkdown; /* Trying to force the link down? */
455  unsigned int lnkcnt; /* Counter for link-up attempts. */
456  struct timer_list happy_timer; /* To watch the link when coming up. */
457  enum happy_timer_state timer_state; /* State of the auto-neg timer. */
458  unsigned int timer_ticks; /* Number of clicks at each state. */
459 
460  struct net_device *dev; /* Backpointer */
461  struct quattro *qfe_parent; /* For Quattro cards */
462  int qfe_ent; /* Which instance on quattro */
463 };
464 
465 /* Here are the happy flags. */
466 #define HFLAG_POLL 0x00000001 /* We are doing MIF polling */
467 #define HFLAG_FENABLE 0x00000002 /* The MII frame is enabled */
468 #define HFLAG_LANCE 0x00000004 /* We are using lance-mode */
469 #define HFLAG_RXENABLE 0x00000008 /* Receiver is enabled */
470 #define HFLAG_AUTO 0x00000010 /* Using auto-negotiation, 0 = force */
471 #define HFLAG_FULL 0x00000020 /* Full duplex enable */
472 #define HFLAG_MACFULL 0x00000040 /* Using full duplex in the MAC */
473 #define HFLAG_POLLENABLE 0x00000080 /* Actually try MIF polling */
474 #define HFLAG_RXCV 0x00000100 /* XXX RXCV ENABLE */
475 #define HFLAG_INIT 0x00000200 /* Init called at least once */
476 #define HFLAG_LINKUP 0x00000400 /* 1 = Link is up */
477 #define HFLAG_PCI 0x00000800 /* PCI based Happy Meal */
478 #define HFLAG_QUATTRO 0x00001000 /* On QFE/Quattro card */
479 
480 #define HFLAG_20_21 (HFLAG_POLLENABLE | HFLAG_FENABLE)
481 #define HFLAG_NOT_A0 (HFLAG_POLLENABLE | HFLAG_FENABLE | HFLAG_LANCE | HFLAG_RXCV)
482 
483 /* Support for QFE/Quattro cards. */
484 struct quattro {
485  struct net_device *happy_meals[4];
486 
487  /* This is either a sbus_dev or a pci_dev. */
488  void *quattro_dev;
489 
490  struct quattro *next;
491 
492  /* PROM ranges, if any. */
493 #ifdef CONFIG_SBUS
494  struct linux_prom_ranges ranges[8];
495 #endif
496  int nranges;
497 };
498 
499 /* We use this to acquire receive skb's that we can DMA directly into. */
500 #define ALIGNED_RX_SKB_ADDR(addr) \
501  ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr))
502 #define happy_meal_alloc_skb(__length, __gfp_flags) \
503 ({ struct sk_buff *__skb; \
504  __skb = alloc_skb((__length) + 64, (__gfp_flags)); \
505  if(__skb) { \
506  int __offset = (int) ALIGNED_RX_SKB_ADDR(__skb->data); \
507  if(__offset) \
508  skb_reserve(__skb, __offset); \
509  } \
510  __skb; \
511 })
512 
513 #endif /* !(_SUNHME_H) */
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