/* 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/init.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 struct pi_protocol on20 = { .owner = THIS_MODULE, .name = "on20", .max_mode = 2, .epp_first = 2, .default_delay = 1, .max_units = 1, .write_regr = on20_write_regr, .read_regr = on20_read_regr, .write_block = on20_write_block, .read_block = on20_read_block, .connect = on20_connect, .disconnect = on20_disconnect, .log_adapter = on20_log_adapter, }; static int __init on20_init(void) { return pi_register(&on20)-1; } static void __exit on20_exit(void) { pi_unregister(&on20); } MODULE_LICENSE("GPL"); module_init(on20_init) module_exit(on20_exit)