diff options
Diffstat (limited to 'drivers/block/paride/aten.c')
| -rw-r--r-- | drivers/block/paride/aten.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/block/paride/aten.c b/drivers/block/paride/aten.c new file mode 100644 index 00000000000..c4d696d43dc --- /dev/null +++ b/drivers/block/paride/aten.c @@ -0,0 +1,162 @@ +/* + aten.c (c) 1997-8 Grant R. Guenther <grant@torque.net> + Under the terms of the GNU General 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/init.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/wait.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 struct pi_protocol aten = { + .owner = THIS_MODULE, + .name = "aten", + .max_mode = 2, + .epp_first = 2, + .default_delay = 1, + .max_units = 1, + .write_regr = aten_write_regr, + .read_regr = aten_read_regr, + .write_block = aten_write_block, + .read_block = aten_read_block, + .connect = aten_connect, + .disconnect = aten_disconnect, + .log_adapter = aten_log_adapter, +}; + +static int __init aten_init(void) +{ + return pi_register(&aten)-1; +} + +static void __exit aten_exit(void) +{ + pi_unregister( &aten ); +} + +MODULE_LICENSE("GPL"); +module_init(aten_init) +module_exit(aten_exit) |