diff options
Diffstat (limited to 'kernel/drivers/block/paride/on20.c')
| -rw-r--r-- | kernel/drivers/block/paride/on20.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/kernel/drivers/block/paride/on20.c b/kernel/drivers/block/paride/on20.c new file mode 100644 index 000000000..0173697a1 --- /dev/null +++ b/kernel/drivers/block/paride/on20.c @@ -0,0 +1,153 @@ +/* + 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 paride_register(&on20); +} + +static void __exit on20_exit(void) +{ + paride_unregister(&on20); +} + +MODULE_LICENSE("GPL"); +module_init(on20_init) +module_exit(on20_exit) |