212 lines
4.4 KiB
C
212 lines
4.4 KiB
C
/*
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fit3.c (c) 1998 Grant R. Guenther <grant@torque.net>
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Under the terms of the GNU General Public License.
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fit3.c is a low-level protocol driver for newer models
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of the Fidelity International Technology parallel port adapter.
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This adapter is used in their TransDisk 3000 portable
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hard-drives, as well as CD-ROM, PD-CD and other devices.
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The TD-2000 and certain older devices use a different protocol.
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Try the fit2 protocol module with them.
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NB: The FIT adapters do not appear to support the control
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registers. So, we map ALT_STATUS to STATUS and NO-OP writes
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to the device control register - this means that IDE reset
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will not work on these devices.
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*/
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#define FIT3_VERSION "1.0"
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <asm/io.h>
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#include "paride.h"
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#define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
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#define w7(byte) {out_p(7,byte);}
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#define r7() (in_p(7) & 0xff)
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/* cont = 0 - access the IDE register file
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cont = 1 - access the IDE command set
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*/
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static void fit3_write_regr( PIA *pi, int cont, int regr, int val)
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{ if (cont == 1) return;
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switch (pi->mode) {
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case 0:
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case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc);
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w0(val); w2(0xd);
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w0(0); w2(0xc);
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break;
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case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
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w4(val); w4(0);
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w2(0xc);
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break;
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}
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}
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static int fit3_read_regr( PIA *pi, int cont, int regr )
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{ int a, b;
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if (cont) {
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if (regr != 6) return 0xff;
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regr = 7;
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}
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switch (pi->mode) {
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case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
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w2(0xd); a = r1();
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w2(0xf); b = r1();
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w2(0xc);
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return j44(a,b);
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case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
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w2(0xec); w2(0xee); w2(0xef); a = r0();
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w2(0xc);
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return a;
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case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
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w2(0xec);
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a = r4(); b = r4();
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w2(0xc);
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return a;
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}
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return -1;
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}
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static void fit3_read_block( PIA *pi, char * buf, int count )
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{ int k, a, b, c, d;
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switch (pi->mode) {
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case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
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for (k=0;k<count/2;k++) {
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w2(0xd); a = r1();
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w2(0xf); b = r1();
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w2(0xc); c = r1();
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w2(0xe); d = r1();
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buf[2*k ] = j44(a,b);
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buf[2*k+1] = j44(c,d);
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}
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w2(0xc);
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break;
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case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
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w2(0xec); w2(0xee);
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for (k=0;k<count/2;k++) {
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w2(0xef); a = r0();
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w2(0xee); b = r0();
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buf[2*k ] = a;
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buf[2*k+1] = b;
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}
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w2(0xec);
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w2(0xc);
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break;
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case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
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w2(0xec);
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for (k=0;k<count;k++) buf[k] = r4();
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w2(0xc);
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break;
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}
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}
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static void fit3_write_block( PIA *pi, char * buf, int count )
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{ int k;
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switch (pi->mode) {
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case 0:
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case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
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for (k=0;k<count/2;k++) {
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w0(buf[2*k ]); w2(0xd);
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w0(buf[2*k+1]); w2(0xc);
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}
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break;
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case 2: w2(0xc); w0(0); w2(0x8); w2(0xc);
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for (k=0;k<count;k++) w4(buf[k]);
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w2(0xc);
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break;
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}
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}
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static void fit3_connect ( PIA *pi )
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{ pi->saved_r0 = r0();
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pi->saved_r2 = r2();
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w2(0xc); w0(0); w2(0xa);
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if (pi->mode == 2) {
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w2(0xc); w0(0x9); w2(0x8); w2(0xc);
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}
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}
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static void fit3_disconnect ( PIA *pi )
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{ w2(0xc); w0(0xa); w2(0x8); w2(0xc);
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w0(pi->saved_r0);
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w2(pi->saved_r2);
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}
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static void fit3_log_adapter( PIA *pi, char * scratch, int verbose )
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{ char *mode_string[3] = {"4-bit","8-bit","EPP"};
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printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, "
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"mode %d (%s), delay %d\n",
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pi->device,FIT3_VERSION,pi->port,
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pi->mode,mode_string[pi->mode],pi->delay);
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}
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static struct pi_protocol fit3 = {
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.owner = THIS_MODULE,
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.name = "fit3",
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.max_mode = 3,
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.epp_first = 2,
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.default_delay = 1,
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.max_units = 1,
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.write_regr = fit3_write_regr,
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.read_regr = fit3_read_regr,
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.write_block = fit3_write_block,
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.read_block = fit3_read_block,
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.connect = fit3_connect,
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.disconnect = fit3_disconnect,
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.log_adapter = fit3_log_adapter,
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};
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static int __init fit3_init(void)
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{
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return paride_register(&fit3);
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}
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static void __exit fit3_exit(void)
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{
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paride_unregister(&fit3);
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}
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MODULE_LICENSE("GPL");
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module_init(fit3_init)
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module_exit(fit3_exit)
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