| /* |
| on20.c (c) 1996-8 Grant R. Guenther <grant@torque.net> |
| Under the terms of the GNU General Public License. |
| |
| on20.c is a low-level protocol driver for the |
| Onspec 90c20 parallel to IDE adapter. |
| */ |
| |
| /* Changes: |
| |
| 1.01 GRG 1998.05.06 init_proto, release_proto |
| |
| */ |
| |
| #define ON20_VERSION "1.01" |
| |
| #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 op(f) w2(4);w0(f);w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4); |
| #define vl(v) w2(4);w0(v);w2(5);w2(7);w2(5);w2(4); |
| |
| #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0)) |
| |
| /* cont = 0 - access the IDE register file |
| cont = 1 - access the IDE command set |
| */ |
| |
| static int on20_read_regr( PIA *pi, int cont, int regr ) |
| |
| { int h,l, r ; |
| |
| r = (regr<<2) + 1 + cont; |
| |
| op(1); vl(r); op(0); |
| |
| switch (pi->mode) { |
| |
| case 0: w2(4); w2(6); l = r1(); |
| w2(4); w2(6); h = r1(); |
| w2(4); w2(6); w2(4); w2(6); w2(4); |
| return j44(l,h); |
| |
| case 1: w2(4); w2(0x26); r = r0(); |
| w2(4); w2(0x26); w2(4); |
| return r; |
| |
| } |
| return -1; |
| } |
| |
| static void on20_write_regr( PIA *pi, int cont, int regr, int val ) |
| |
| { int r; |
| |
| r = (regr<<2) + 1 + cont; |
| |
| op(1); vl(r); |
| op(0); vl(val); |
| op(0); vl(val); |
| } |
| |
| static void on20_connect ( PIA *pi) |
| |
| { pi->saved_r0 = r0(); |
| pi->saved_r2 = r2(); |
| |
| w2(4);w0(0);w2(0xc);w2(4);w2(6);w2(4);w2(6);w2(4); |
| if (pi->mode) { op(2); vl(8); op(2); vl(9); } |
| else { op(2); vl(0); op(2); vl(8); } |
| } |
| |
| static void on20_disconnect ( PIA *pi ) |
| |
| { w2(4);w0(7);w2(4);w2(0xc);w2(4); |
| w0(pi->saved_r0); |
| w2(pi->saved_r2); |
| } |
| |
| static void on20_read_block( PIA *pi, char * buf, int count ) |
| |
| { int k, l, h; |
| |
| op(1); vl(1); op(0); |
| |
| for (k=0;k<count;k++) |
| if (pi->mode) { |
| w2(4); w2(0x26); buf[k] = r0(); |
| } else { |
| w2(6); l = r1(); w2(4); |
| w2(6); h = r1(); w2(4); |
| buf[k] = j44(l,h); |
| } |
| w2(4); |
| } |
| |
| static void on20_write_block( PIA *pi, char * buf, int count ) |
| |
| { int k; |
| |
| op(1); vl(1); op(0); |
| |
| for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); } |
| w2(4); |
| } |
| |
| static void on20_log_adapter( PIA *pi, char * scratch, int verbose ) |
| |
| { char *mode_string[2] = {"4-bit","8-bit"}; |
| |
| printk("%s: on20 %s, OnSpec 90c20 at 0x%x, ", |
| pi->device,ON20_VERSION,pi->port); |
| printk("mode %d (%s), delay %d\n",pi->mode, |
| mode_string[pi->mode],pi->delay); |
| |
| } |
| |
| static void on20_init_proto( PIA *pi) |
| |
| { MOD_INC_USE_COUNT; |
| } |
| |
| static void on20_release_proto( PIA *pi) |
| |
| { MOD_DEC_USE_COUNT; |
| } |
| |
| struct pi_protocol on20 = {"on20",0,2,2,1,1, |
| on20_write_regr, |
| on20_read_regr, |
| on20_write_block, |
| on20_read_block, |
| on20_connect, |
| on20_disconnect, |
| 0, |
| 0, |
| 0, |
| on20_log_adapter, |
| on20_init_proto, |
| on20_release_proto |
| }; |
| |
| |
| #ifdef MODULE |
| |
| int init_module(void) |
| |
| { return pi_register( &on20 ) - 1; |
| } |
| |
| void cleanup_module(void) |
| |
| { pi_unregister( &on20 ); |
| } |
| |
| #endif |
| |
| /* end of on20.c */ |
| MODULE_LICENSE("GPL"); |