1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * friq.c is a low-level protocol driver for the Freecom "IQ"
10  * CD-ROM drive.  It is also used in LS-120 drives by
13  * The battery powered drive requires software support to
14  * control the power to the drive.  This module enables the
17  * the friq module is built in to the kernel, the power
19  * used to conserve battery power.
41  * cont = 0 - access the IDE register file
42  * cont = 1 - access the IDE command set
71 	int h, l, k, ph;  in friq_read_block_int()  local
73 	switch (pi->mode) {  in friq_read_block_int()
76 		for (k = 0; k < count; k++) {  in friq_read_block_int()
79 			buf[k] = j44(l, h);  in friq_read_block_int()
87 		for (k = 0; k < count; k++) {  in friq_read_block_int()
89 			buf[k] = r0();  in friq_read_block_int()
90 			ph = 2 - ph;  in friq_read_block_int()
96 		for (k = 0; k < count - 2; k++)  in friq_read_block_int()
97 			buf[k] = r4();  in friq_read_block_int()
99 		buf[count - 2] = r4();  in friq_read_block_int()
100 		buf[count - 1] = r4();  in friq_read_block_int()
105 		for (k = 0; k < count / 2 - 1; k++)  in friq_read_block_int()
106 			((u16 *)buf)[k] = r4w();  in friq_read_block_int()
108 		buf[count - 2] = r4();  in friq_read_block_int()
109 		buf[count - 1] = r4();  in friq_read_block_int()
114 		for (k = 0; k < count / 4 - 1; k++)  in friq_read_block_int()
115 			((u32 *)buf)[k] = r4l();  in friq_read_block_int()
116 		buf[count - 4] = r4();  in friq_read_block_int()
117 		buf[count - 3] = r4();  in friq_read_block_int()
119 		buf[count - 2] = r4();  in friq_read_block_int()
120 		buf[count - 1] = r4();  in friq_read_block_int()
133 	int k;  in friq_write_block()  local
135 	switch (pi->mode) {  in friq_write_block()
139 		for (k = 0; k < count; k++) {  in friq_write_block()
140 			w0(buf[k]);  in friq_write_block()
147 		for (k = 0; k < count; k++)  in friq_write_block()
148 			w4(buf[k]);  in friq_write_block()
153 		for (k = 0; k < count / 2; k++)  in friq_write_block()
154 			w4w(((u16 *)buf)[k]);  in friq_write_block()
159 		for (k = 0; k < count / 4; k++)  in friq_write_block()
160 			w4l(((u32 *)buf)[k]);  in friq_write_block()
168 	pi->saved_r0 = r0();  in friq_connect()
169 	pi->saved_r2 = r2();  in friq_connect()
176 	w0(pi->saved_r0);  in friq_disconnect()
177 	w2(pi->saved_r2);  in friq_disconnect()
182 	int j, k, r;  in friq_test_proto()  local
186 	pi->saved_r0 = r0();  in friq_test_proto()
189 	w0(pi->saved_r0);  in friq_test_proto()
192 	for (j = 0; j < 2; j++) {  in friq_test_proto()
193 		friq_write_regr(pi, 0, 6, 0xa0 + j * 0x10);  in friq_test_proto()
194 		for (k = 0; k < 256; k++) {  in friq_test_proto()
195 			friq_write_regr(pi, 0, 2, k ^ 0xaa);  in friq_test_proto()
196 			friq_write_regr(pi, 0, 3, k ^ 0x55);  in friq_test_proto()
197 			if (friq_read_regr(pi, 0, 2) != (k ^ 0xaa))  in friq_test_proto()
198 				e[j]++;  in friq_test_proto()
206 	for (k = 0; k < 128; k++) {  in friq_test_proto()
207 		if (scratch[k] != k)  in friq_test_proto()
212 	dev_dbg(&pi->dev,  in friq_test_proto()
214 		pi->port, pi->mode, e[0], e[1], r);  in friq_test_proto()
221 	char *mode_string[6] = { "4-bit", "8-bit", "EPP-8", "EPP-16", "EPP-32"};  in friq_log_adapter()
223 	dev_info(&pi->dev,  in friq_log_adapter()
224 		 "Freecom IQ ASIC-2 adapter at 0x%x, mode %d (%s), delay %d\n",  in friq_log_adapter()
225 		 pi->port, pi->mode, mode_string[pi->mode], pi->delay);  in friq_log_adapter()
227 	pi->private = 1;  in friq_log_adapter()
235 	if (pi->private) {		/* turn off the power */  in friq_release_proto()
239 		pi->private = 0;  in friq_release_proto()