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git.ipfire.org Git - thirdparty/kernel/stable.git/blob - drivers/ata/pata_parport/friq.c
dc428f54fe0c33341ccb955ea7de8bfd0c24a7ba
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * (c) 1998 Grant R. Guenther <grant@torque.net>
5 * friq.c is a low-level protocol driver for the Freecom "IQ"
6 * parallel port IDE adapter. Early versions of this adapter
7 * use the 'frpw' protocol.
9 * Freecom uses this adapter in a battery powered external
10 * CD-ROM drive. It is also used in LS-120 drives by
11 * Maxell and Panasonic, and other devices.
13 * The battery powered drive requires software support to
14 * control the power to the drive. This module enables the
15 * drive power when the high level driver (pcd) is loaded
16 * and disables it when the module is unloaded. Note, if
17 * the friq module is built in to the kernel, the power
18 * will never be switched off, so other means should be
19 * used to conserve battery power.
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/wait.h>
29 #include "pata_parport.h"
33 w2(4); w0(0xff); w0(0xff); w0(0x73); w0(0x73); \
34 w0(0xc9); w0(0xc9); w0(0x26); \
35 w0(0x26); w0(x); w0(x); \
38 #define j44(l, h) (((l >> 4) & 0x0f) | (h & 0xf0))
41 * cont = 0 - access the IDE register file
42 * cont = 1 - access the IDE command set
44 static int cont_map
[2] = { 0x08, 0x10 };
46 static int friq_read_regr(struct pi_adapter
*pi
, int cont
, int regr
)
50 r
= regr
+ cont_map
[cont
];
60 static void friq_write_regr(struct pi_adapter
*pi
, int cont
, int regr
, int val
)
62 int r
= regr
+ cont_map
[cont
];
66 w2(5); w2(7); w2(5); w2(4);
69 static void friq_read_block_int(struct pi_adapter
*pi
, char *buf
, int count
, int regr
)
76 for (k
= 0; k
< count
; k
++) {
87 for (k
= 0; k
< count
; k
++) {
92 w2(0xac); w2(0xa4); w2(4);
96 for (k
= 0; k
< count
- 2; k
++)
99 buf
[count
- 2] = r4();
100 buf
[count
- 1] = r4();
105 for (k
= 0; k
< count
/ 2 - 1; k
++)
106 ((u16
*)buf
)[k
] = r4w();
108 buf
[count
- 2] = r4();
109 buf
[count
- 1] = r4();
114 for (k
= 0; k
< count
/ 4 - 1; k
++)
115 ((u32
*)buf
)[k
] = r4l();
116 buf
[count
- 4] = r4();
117 buf
[count
- 3] = r4();
119 buf
[count
- 2] = r4();
120 buf
[count
- 1] = r4();
126 static void friq_read_block(struct pi_adapter
*pi
, char *buf
, int count
)
128 friq_read_block_int(pi
, buf
, count
, 0x08);
131 static void friq_write_block(struct pi_adapter
*pi
, char *buf
, int count
)
139 for (k
= 0; k
< count
; k
++) {
147 for (k
= 0; k
< count
; k
++)
153 for (k
= 0; k
< count
/ 2; k
++)
154 w4w(((u16
*)buf
)[k
]);
159 for (k
= 0; k
< count
/ 4; k
++)
160 w4l(((u32
*)buf
)[k
]);
166 static void friq_connect(struct pi_adapter
*pi
)
173 static void friq_disconnect(struct pi_adapter
*pi
)
180 static int friq_test_proto(struct pi_adapter
*pi
)
187 w0(0xff); udelay(20); CMD(0x3d); /* turn the power on */
192 for (j
= 0; j
< 2; j
++) {
193 friq_write_regr(pi
, 0, 6, 0xa0 + j
* 0x10);
194 for (k
= 0; k
< 256; k
++) {
195 friq_write_regr(pi
, 0, 2, k
^ 0xaa);
196 friq_write_regr(pi
, 0, 3, k
^ 0x55);
197 if (friq_read_regr(pi
, 0, 2) != (k
^ 0xaa))
204 friq_read_block_int(pi
, scratch
, 512, 0x10);
206 for (k
= 0; k
< 128; k
++) {
213 "friq: port 0x%x, mode %d, test=(%d,%d,%d)\n",
214 pi
->port
, pi
->mode
, e
[0], e
[1], r
);
216 return r
|| (e
[0] && e
[1]);
219 static void friq_log_adapter(struct pi_adapter
*pi
)
221 char *mode_string
[6] = { "4-bit", "8-bit", "EPP-8", "EPP-16", "EPP-32"};
224 "Freecom IQ ASIC-2 adapter at 0x%x, mode %d (%s), delay %d\n",
225 pi
->port
, pi
->mode
, mode_string
[pi
->mode
], pi
->delay
);
229 CMD(0x9e); /* disable sleep timer */
233 static void friq_release_proto(struct pi_adapter
*pi
)
235 if (pi
->private) { /* turn off the power */
237 CMD(0x1d); CMD(0x1e);
243 static struct pi_protocol friq
= {
244 .owner
= THIS_MODULE
,
250 .write_regr
= friq_write_regr
,
251 .read_regr
= friq_read_regr
,
252 .write_block
= friq_write_block
,
253 .read_block
= friq_read_block
,
254 .connect
= friq_connect
,
255 .disconnect
= friq_disconnect
,
256 .test_proto
= friq_test_proto
,
257 .log_adapter
= friq_log_adapter
,
258 .release_proto
= friq_release_proto
,
261 MODULE_LICENSE("GPL");
262 module_pata_parport_driver(friq
);