1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * (c) 1996-1998  Grant R. Guenther <[email protected]>
5  * frpw.c is a low-level protocol driver for the Freecom "Power" parallel port
6  * IDE adapter.
27  * cont = 0 - access the IDE register file
28  * cont = 1 - access the IDE command set
61 	switch (pi->mode) {  in frpw_read_block_int()
79 			ph = 2 - ph;  in frpw_read_block_int()
94 		for (k = 0; k < count - 2; k++)  in frpw_read_block_int()
97 		buf[count - 2] = r4();  in frpw_read_block_int()
98 		buf[count - 1] = r4();  in frpw_read_block_int()
104 		for (k = 0; k < count / 2 - 1; k++)  in frpw_read_block_int()
107 		buf[count - 2] = r4();  in frpw_read_block_int()
108 		buf[count - 1] = r4();  in frpw_read_block_int()
114 		for (k = 0; k < count / 4 - 1; k++)  in frpw_read_block_int()
116 		buf[count - 4] = r4();  in frpw_read_block_int()
117 		buf[count - 3] = r4();  in frpw_read_block_int()
119 		buf[count - 2] = r4();  in frpw_read_block_int()
120 		buf[count - 1] = r4();  in frpw_read_block_int()
135 	switch (pi->mode) {  in frpw_write_block()
172 	pi->saved_r0 = r0();  in frpw_connect()
173 	pi->saved_r2 = r2();  in frpw_connect()
180 	w0(pi->saved_r0);  in frpw_disconnect()
181 	w2(pi->saved_r2);  in frpw_disconnect()
185  * Stub logic to see if PNP string is available - used to distinguish
198 	olddelay = pi->delay;  in frpw_test_pnp()
199 	pi->delay = 10;  in frpw_test_pnp()
201 	pi->saved_r0 = r0();  in frpw_test_pnp()
202         pi->saved_r2 = r2();  in frpw_test_pnp()
208 	pi->delay = olddelay;  in frpw_test_pnp()
209         w0(pi->saved_r0);  in frpw_test_pnp()
210         w2(pi->saved_r2);  in frpw_test_pnp()
216  * We use the pi->private to remember the result of the PNP test.
217  * To make this work, private = port*2 + chip.  Yes, I know it's a hack :-(
225 	if ((pi->private >> 1) != pi->port)  in frpw_test_proto()
226 		pi->private = frpw_test_pnp(pi) + 2*pi->port;  in frpw_test_proto()
228 	if (((pi->private & 0x1) == 0) && (pi->mode > 2)) {  in frpw_test_proto()
229 		dev_dbg(&pi->dev,  in frpw_test_proto()
230 			"frpw: Xilinx does not support mode %d\n", pi->mode);  in frpw_test_proto()
234 	if (((pi->private & 0x1) == 1) && (pi->mode == 2)) {  in frpw_test_proto()
235 		dev_dbg(&pi->dev, "frpw: ASIC does not support mode 2\n");  in frpw_test_proto()
260 	dev_dbg(&pi->dev,  in frpw_test_proto()
261 		"frpw: port 0x%x, chip %ld, mode %d, test=(%d,%d,%d)\n",  in frpw_test_proto()
262 		pi->port, (pi->private%2), pi->mode, e[0], e[1], r);  in frpw_test_proto()
270 	char *mode[6] = { "4-bit", "8-bit", "EPP", "EPP-8", "EPP-16", "EPP-32"};  in frpw_log_adapter()
272 	dev_info(&pi->dev,  in frpw_log_adapter()
274 		 ((pi->private & 0x1) == 0) ? "Xilinx" : "ASIC",  in frpw_log_adapter()
275 		 pi->port, pi->mode, mode[pi->mode], pi->delay);  in frpw_log_adapter()
297 MODULE_DESCRIPTION("Freecom Power parallel port IDE adapter protocol driver");