fit3.c
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上传日期:2013-04-10
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文件大小:5k
- /*
- fit3.c (c) 1998 Grant R. Guenther <grant@torque.net>
- Under the terms of the GNU General Public License.
- fit3.c is a low-level protocol driver for newer models
- of the Fidelity International Technology parallel port adapter.
- This adapter is used in their TransDisk 3000 portable
- hard-drives, as well as CD-ROM, PD-CD and other devices.
- The TD-2000 and certain older devices use a different protocol.
- Try the fit2 protocol module with them.
- NB: The FIT adapters do not appear to support the control
- registers. So, we map ALT_STATUS to STATUS and NO-OP writes
- to the device control register - this means that IDE reset
- will not work on these devices.
- */
- #define FIT3_VERSION "1.0"
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/wait.h>
- #include <asm/io.h>
- #include "paride.h"
- #define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
- #define w7(byte) {out_p(7,byte);}
- #define r7() (in_p(7) & 0xff)
- /* cont = 0 - access the IDE register file
- cont = 1 - access the IDE command set
- */
- static void fit3_write_regr( PIA *pi, int cont, int regr, int val)
- { if (cont == 1) return;
- switch (pi->mode) {
- case 0:
- case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc);
- w0(val); w2(0xd);
- w0(0); w2(0xc);
- break;
- case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
- w4(val); w4(0);
- w2(0xc);
- break;
- }
- }
- static int fit3_read_regr( PIA *pi, int cont, int regr )
- { int a, b;
- if (cont) {
- if (regr != 6) return 0xff;
- regr = 7;
- }
- switch (pi->mode) {
- case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
- w2(0xd); a = r1();
- w2(0xf); b = r1();
- w2(0xc);
- return j44(a,b);
- case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
- w2(0xec); w2(0xee); w2(0xef); a = r0();
- w2(0xc);
- return a;
- case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
- w2(0xec);
- a = r4(); b = r4();
- w2(0xc);
- return a;
- }
- return -1;
- }
- static void fit3_read_block( PIA *pi, char * buf, int count )
- { int k, a, b, c, d;
- switch (pi->mode) {
- case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
- for (k=0;k<count/2;k++) {
- w2(0xd); a = r1();
- w2(0xf); b = r1();
- w2(0xc); c = r1();
- w2(0xe); d = r1();
- buf[2*k ] = j44(a,b);
- buf[2*k+1] = j44(c,d);
- }
- w2(0xc);
- break;
- case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
- w2(0xec); w2(0xee);
- for (k=0;k<count/2;k++) {
- w2(0xef); a = r0();
- w2(0xee); b = r0();
- buf[2*k ] = a;
- buf[2*k+1] = b;
- }
- w2(0xec);
- w2(0xc);
- break;
- case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
- w2(0xec);
- for (k=0;k<count;k++) buf[k] = r4();
- w2(0xc);
- break;
- }
- }
- static void fit3_write_block( PIA *pi, char * buf, int count )
- { int k;
- switch (pi->mode) {
- case 0:
- case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
- for (k=0;k<count/2;k++) {
- w0(buf[2*k ]); w2(0xd);
- w0(buf[2*k+1]); w2(0xc);
- }
- break;
- case 2: w2(0xc); w0(0); w2(0x8); w2(0xc);
- for (k=0;k<count;k++) w4(buf[k]);
- w2(0xc);
- break;
- }
- }
- static void fit3_connect ( PIA *pi )
- { pi->saved_r0 = r0();
- pi->saved_r2 = r2();
- w2(0xc); w0(0); w2(0xa);
- if (pi->mode == 2) {
- w2(0xc); w0(0x9); w2(0x8); w2(0xc);
- }
- }
- static void fit3_disconnect ( PIA *pi )
- { w2(0xc); w0(0xa); w2(0x8); w2(0xc);
- w0(pi->saved_r0);
- w2(pi->saved_r2);
- }
- static void fit3_log_adapter( PIA *pi, char * scratch, int verbose )
- { char *mode_string[3] = {"4-bit","8-bit","EPP"};
- printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, "
- "mode %d (%s), delay %dn",
- pi->device,FIT3_VERSION,pi->port,
- pi->mode,mode_string[pi->mode],pi->delay);
- }
- static void fit3_init_proto(PIA *pi)
- { MOD_INC_USE_COUNT;
- }
- static void fit3_release_proto(PIA *pi)
- { MOD_DEC_USE_COUNT;
- }
- struct pi_protocol fit3 = {"fit3",0,3,2,1,1,
- fit3_write_regr,
- fit3_read_regr,
- fit3_write_block,
- fit3_read_block,
- fit3_connect,
- fit3_disconnect,
- 0,
- 0,
- 0,
- fit3_log_adapter,
- fit3_init_proto,
- fit3_release_proto
- };
- #ifdef MODULE
- int init_module(void)
- { return pi_register( &fit3 ) - 1;
- }
- void cleanup_module(void)
- { pi_unregister( &fit3 );
- }
- #endif
- /* end of fit3.c */
- MODULE_LICENSE("GPL");