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/*
2 
 * 3C589 and 3C562.
3 
 * To do:
4 
 *	check xcvr10Base2 still works (is GlobalReset necessary?).
5 
 */
6 
#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "../port/error.h"
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#include "../port/netif.h"
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15 
#include "etherif.h"
16 
 
17 
enum {						/* all windows */
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	CommandR		= 0x000E,
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	IntStatusR		= 0x000E,
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};
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enum {						/* Commands */
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	GlobalReset		= 0x0000,
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	SelectRegisterWindow	= 0x0001,
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	RxReset			= 0x0005,
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	TxReset			= 0x000B,
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	AcknowledgeInterrupt	= 0x000D,
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};
29 
 
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enum {						/* IntStatus bits */
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	commandInProgress	= 0x1000,
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};
33 
 
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#define COMMAND(port, cmd, a)	outs((port)+CommandR, ((cmd)<<11)|(a))
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#define STATUS(port)		ins((port)+IntStatusR)
36 
 
37 
enum {						/* Window 0 - setup */
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	Wsetup			= 0x0000,
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						/* registers */
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	ManufacturerID		= 0x0000,	/* 3C5[08]*, 3C59[27] */
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	ProductID		= 0x0002,	/* 3C5[08]*, 3C59[27] */
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	ConfigControl		= 0x0004,	/* 3C5[08]*, 3C59[27] */
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	AddressConfig		= 0x0006,	/* 3C5[08]*, 3C59[27] */
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	ResourceConfig		= 0x0008,	/* 3C5[08]*, 3C59[27] */
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	EepromCommand		= 0x000A,
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	EepromData		= 0x000C,
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						/* AddressConfig Bits */
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	autoSelect9		= 0x0080,
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	xcvrMask9		= 0xC000,
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						/* ConfigControl bits */
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	Ena			= 0x0001,
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	base10TAvailable9	= 0x0200,
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	coaxAvailable9		= 0x1000,
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	auiAvailable9		= 0x2000,
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						/* EepromCommand bits */
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	EepromReadRegister	= 0x0080,
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	EepromBusy		= 0x8000,
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};
59 
 
60 
enum {						/* Window 1 - operating set */
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	Wop			= 0x0001,
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};
63 
 
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enum {						/* Window 3 - FIFO management */
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	Wfifo			= 0x0003,
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						/* registers */
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	InternalConfig		= 0x0000,	/* 3C509B, 3C589, 3C59[0257] */
68 
						/* InternalConfig bits */
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	xcvr10BaseT		= 0x00000000,
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	xcvr10Base2		= 0x00300000,
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};
72 
 
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enum {						/* Window 4 - diagnostic */
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	Wdiagnostic		= 0x0004,
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						/* registers */
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	MediaStatus		= 0x000A,
77 
						/* MediaStatus bits */
78 
	linkBeatDetect		= 0x0800,
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};
80 
 
81 
extern int etherelnk3reset(Ether*);
82 
 
83 
static char *tcmpcmcia[] = {
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	"3C589",			/* 3COM 589[ABCD] */
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	"3C562",			/* 3COM 562 */
86 
	"589E",				/* 3COM Megahertz 589E */
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	nil,
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};
89 
 
90 
static int
91 
configASIC(Ether* ether, int port, int xcvr)
92 
{
93 
	int x;
94 
 
95 
	/* set Window 0 configuration registers */
96 
	COMMAND(port, SelectRegisterWindow, Wsetup);
97 
	outs(port+ConfigControl, Ena);
98 
 
99 
	/* IRQ must be 3 on 3C589/3C562 */
100 
	outs(port + ResourceConfig, 0x3F00);
101 
 
102 
	x = ins(port+AddressConfig) & ~xcvrMask9;
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	x |= (xcvr>>20)<<14;
104 
	outs(port+AddressConfig, x);
105 
 
106 
	COMMAND(port, TxReset, 0);
107 
	while(STATUS(port) & commandInProgress)
108 
		;
109 
	COMMAND(port, RxReset, 0);
110 
	while(STATUS(port) & commandInProgress)
111 
		;
112 
 
113 
	return etherelnk3reset(ether);
114 
}
115 
 
116 
static int
117 
reset(Ether* ether)
118 
{
119 
	int i, t, slot;
120 
	char *type;
121 
	int port;
122 
	enum { WantAny, Want10BT, Want10B2 };
123 
	int want;
124 
	uchar ea[6];
125 
	char *p;
126 
 
127 
	if(ether->irq == 0)
128 
		ether->irq = 10;
129 
	if(ether->port == 0)
130 
		ether->port = 0x240;
131 
	port = ether->port;
132 
 
133 
	if(ioalloc(port, 0x10, 0, "3C589") < 0)
134 
		return -1;
135 
 
136 
	type = nil;
137 
	slot = -1;
138 
	for(i = 0; tcmpcmcia[i] != nil; i++){
139 
		type = tcmpcmcia[i];
140 
		if((slot = pcmspecial(type, ether)) >= 0)
141 
			break;
142 
	}
143 
	ether->type = type;	/* must be set before calling configASIC */
144 
	if(slot < 0){
145 
		iofree(port);
146 
		return -1;
147 
	}
148 
 
149 
	/*
150 
	 * Read Ethernet address from card memory
151 
	 * on 3C562, but only if the user has not
152 
	 * overridden it.
153 
	 */
154 
	memset(ea, 0, sizeof ea);
155 
	if(memcmp(ea, ether->ea, 6) == 0 && strcmp(type, "3C562") == 0) {
156 
		if(pcmcistuple(slot, 0x88, -1, ea, 6) == 6) {
157 
			for(i = 0; i < 6; i += 2){
158 
				t = ea[i];
159 
				ea[i] = ea[i+1];
160 
				ea[i+1] = t;
161 
			}
162 
			memmove(ether->ea, ea, 6);
163 
		}
164 
	}
165 
	/*
166 
	 * Allow user to specify desired media in plan9.ini
167 
	 */
168 
	want = WantAny;
169 
	for(i = 0; i < ether->nopt; i++){
170 
		if(cistrncmp(ether->opt[i], "media=", 6) != 0)
171 
			continue;
172 
		p = ether->opt[i]+6;
173 
		if(cistrcmp(p, "10base2") == 0)
174 
			want = Want10B2;
175 
		else if(cistrcmp(p, "10baseT") == 0)
176 
			want = Want10BT;
177 
	}
178 
 
179 
	/* try configuring as a 10BaseT */
180 
	if(want==WantAny || want==Want10BT){
181 
		if(configASIC(ether, port, xcvr10BaseT) < 0){
182 
			pcmspecialclose(slot);
183 
			iofree(port);
184 
			return -1;
185 
		}
186 
		delay(100);
187 
		COMMAND(port, SelectRegisterWindow, Wdiagnostic);
188 
		if((ins(port+MediaStatus)&linkBeatDetect) || want==Want10BT){
189 
			COMMAND(port, SelectRegisterWindow, Wop);
190 
			print("#l%d: xcvr10BaseT %s\n", ether->ctlrno, type);
191 
			return 0;
192 
		}
193 
	}
194 
 
195 
	/* try configuring as a 10base2 */
196 
	if(want==WantAny || want==Want10B2){
197 
		COMMAND(port, GlobalReset, 0);
198 
		if(configASIC(ether, port, xcvr10Base2) < 0){
199 
			pcmspecialclose(slot);
200 
			iofree(port);
201 
			return -1;
202 
		}
203 
		print("#l%d: xcvr10Base2 %s\n", ether->ctlrno, type);
204 
		return 0;
205 
	}
206 
	return -1;		/* not reached */
207 
}
208 
 
209 
void
210 
ether589link(void)
211 
{
212 
	addethercard("3C589", reset);
213 
	addethercard("3C562", reset);
214 
	addethercard("589E", reset);
215 
}