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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [drivers/] [block/] [paride/] [fit3.c] - Rev 1765
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/* fit3.c (c) 1998 Grant R. Guenther <grant@torque.net> Under the terms of the GNU 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 <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 %d\n", 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 */