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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [drivers/] [block/] [paride/] [aten.c] - Rev 901
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/* aten.c (c) 1997-8 Grant R. Guenther <grant@torque.net> Under the terms of the GNU public license. aten.c is a low-level protocol driver for the ATEN EH-100 parallel port adapter. The EH-100 supports 4-bit and 8-bit modes only. There is also an EH-132 which supports EPP mode transfers. The EH-132 is not yet supported. */ /* Changes: 1.01 GRG 1998.05.05 init_proto, release_proto */ #define ATEN_VERSION "1.01" #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>>4)&0x0f)|(b&0xf0))^0x88) /* cont = 0 - access the IDE register file cont = 1 - access the IDE command set */ static int cont_map[2] = { 0x08, 0x20 }; static void aten_write_regr( PIA *pi, int cont, int regr, int val) { int r; r = regr + cont_map[cont] + 0x80; w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc); } static int aten_read_regr( PIA *pi, int cont, int regr ) { int a, b, r; r = regr + cont_map[cont] + 0x40; switch (pi->mode) { case 0: w0(r); w2(0xe); w2(6); w2(7); w2(6); w2(0); a = r1(); w0(0x10); b = r1(); w2(0xc); return j44(a,b); case 1: r |= 0x10; w0(r); w2(0xe); w2(6); w0(0xff); w2(0x27); w2(0x26); w2(0x20); a = r0(); w2(0x26); w2(0xc); return a; } return -1; } static void aten_read_block( PIA *pi, char * buf, int count ) { int k, a, b, c, d; switch (pi->mode) { case 0: w0(0x48); w2(0xe); w2(6); for (k=0;k<count/2;k++) { w2(7); w2(6); w2(2); a = r1(); w0(0x58); b = r1(); w2(0); d = r1(); w0(0x48); c = r1(); buf[2*k] = j44(c,d); buf[2*k+1] = j44(a,b); } w2(0xc); break; case 1: w0(0x58); w2(0xe); w2(6); for (k=0;k<count/2;k++) { w2(0x27); w2(0x26); w2(0x22); a = r0(); w2(0x20); b = r0(); buf[2*k] = b; buf[2*k+1] = a; } w2(0x26); w2(0xc); break; } } static void aten_write_block( PIA *pi, char * buf, int count ) { int k; w0(0x88); w2(0xe); w2(6); for (k=0;k<count/2;k++) { w0(buf[2*k+1]); w2(0xe); w2(6); w0(buf[2*k]); w2(7); w2(6); } w2(0xc); } static void aten_connect ( PIA *pi ) { pi->saved_r0 = r0(); pi->saved_r2 = r2(); w2(0xc); } static void aten_disconnect ( PIA *pi ) { w0(pi->saved_r0); w2(pi->saved_r2); } static void aten_log_adapter( PIA *pi, char * scratch, int verbose ) { char *mode_string[2] = {"4-bit","8-bit"}; printk("%s: aten %s, ATEN EH-100 at 0x%x, ", pi->device,ATEN_VERSION,pi->port); printk("mode %d (%s), delay %d\n",pi->mode, mode_string[pi->mode],pi->delay); } static void aten_init_proto( PIA *pi ) { MOD_INC_USE_COUNT; } static void aten_release_proto( PIA *pi ) { MOD_DEC_USE_COUNT; } struct pi_protocol aten = {"aten",0,2,2,1,1, aten_write_regr, aten_read_regr, aten_write_block, aten_read_block, aten_connect, aten_disconnect, 0, 0, 0, aten_log_adapter, aten_init_proto, aten_release_proto }; #ifdef MODULE int init_module(void) { return pi_register( &aten ) - 1; } void cleanup_module(void) { pi_unregister( &aten ); } #endif /* end of aten.c */
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