5  * epia.c is a low-level protocol driver for Shuttle Technologies
26  *		4  16-bit EPP
30 #define j44(a, b)	(((a >> 4) & 0x0f) + (b & 0xf0))  argument
31 #define j53(a, b)	(((a >> 3) & 0x1f) + ((b << 4) & 0xe0))  argument
41 	int a, b, r;  in epia_read_regr()  local
49 		a = r1(); w2(1); b = r1(); w2(4);  in epia_read_regr()
50 		return j44(a, b);  in epia_read_regr()
55 		a = r1(); b = r2(); w2(4);  in epia_read_regr()
56 		return j53(a, b);  in epia_read_regr()
60 		a = r0(); w2(4);  in epia_read_regr()
61 		return a;  in epia_read_regr()
63 	case 4:  in epia_read_regr()
65 		w3(regr); w2(0x24); a = r4(); w2(4);  in epia_read_regr()
66 		return a;  in epia_read_regr()
83 		w0(r); w2(1); w0(val); w2(3); w2(4);  in epia_write_regr()
86 	case 4:  in epia_write_regr()
89 		w3(r); w4(val); w2(4);  in epia_write_regr()
108 	w2(4); w0(0xa0); w0(0x50); w0(0xc0); w0(0x30); w0(0xa0); w0(0);  in epia_connect()
109 	w2(1); w2(4);  in epia_connect()
111 		w0(0xa); w2(1); w2(4); w0(0x82); w2(4); w2(0xc); w2(4);  in epia_connect()
112 		w2(0x24); w2(0x26); w2(4);  in epia_connect()
121 	w2(1); w2(4);  in epia_disconnect()
129 	int k, ph, a, b;  in epia_read_block()  local
136 			w2(2+ph); a = r1();  in epia_read_block()
137 			w2(4+ph); b = r1();  in epia_read_block()
138 			buf[k] = j44(a, b);  in epia_read_block()
141 		w0(0); w2(4);  in epia_read_block()
148 			w2(4 + ph);  in epia_read_block()
149 			a = r1(); b = r2();  in epia_read_block()
150 			buf[k] = j53(a, b);  in epia_read_block()
153 		w0(0); w2(4);  in epia_read_block()
163 		w2(6); w2(4);  in epia_read_block()
171 		w2(4); WR(0x84, 0);  in epia_read_block()
173 	case 4:  in epia_read_block()
179 		w2(4); WR(0x84, 0);  in epia_read_block()
185 		for (k = 0; k < count / 4; k++)  in epia_read_block()
187 		w2(4); WR(0x84, 0);  in epia_read_block()
208 			w2(4 + ph);  in epia_write_block()
211 		w2(7); w2(4);  in epia_write_block()
222 	case 4:  in epia_write_block()
235 		for (k = 0; k < count / 4; k++)  in epia_write_block()
284 	char *mode[6] = { "4-bit", "5/3", "8-bit", "EPP-8", "EPP-16", "EPP-32"};  in epia_log_adapter()