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151 lines
3.2 KiB
151 lines
3.2 KiB
/* |
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fit2.c (c) 1998 Grant R. Guenther <[email protected]> |
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Under the terms of the GNU General Public License. |
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fit2.c is a low-level protocol driver for the older version |
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of the Fidelity International Technology parallel port adapter. |
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This adapter is used in their TransDisk 2000 and older TransDisk |
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3000 portable hard-drives. As far as I can tell, this device |
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supports 4-bit mode _only_. |
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Newer models of the FIT products use an enhanced protocol. |
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The "fit3" protocol module should support current drives. |
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*/ |
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#define FIT2_VERSION "1.0" |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/wait.h> |
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#include <asm/io.h> |
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#include "paride.h" |
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#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0)) |
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/* cont = 0 - access the IDE register file |
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cont = 1 - access the IDE command set |
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NB: The FIT adapter does not appear to use the control registers. |
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So, we map ALT_STATUS to STATUS and NO-OP writes to the device |
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control register - this means that IDE reset will not work on these |
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devices. |
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*/ |
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static void fit2_write_regr( PIA *pi, int cont, int regr, int val) |
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{ if (cont == 1) return; |
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w2(0xc); w0(regr); w2(4); w0(val); w2(5); w0(0); w2(4); |
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} |
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static int fit2_read_regr( PIA *pi, int cont, int regr ) |
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{ int a, b, r; |
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if (cont) { |
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if (regr != 6) return 0xff; |
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r = 7; |
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} else r = regr + 0x10; |
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w2(0xc); w0(r); w2(4); w2(5); |
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w0(0); a = r1(); |
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w0(1); b = r1(); |
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w2(4); |
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return j44(a,b); |
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} |
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static void fit2_read_block( PIA *pi, char * buf, int count ) |
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{ int k, a, b, c, d; |
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w2(0xc); w0(0x10); |
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for (k=0;k<count/4;k++) { |
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w2(4); w2(5); |
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w0(0); a = r1(); w0(1); b = r1(); |
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w0(3); c = r1(); w0(2); d = r1(); |
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buf[4*k+0] = j44(a,b); |
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buf[4*k+1] = j44(d,c); |
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w2(4); w2(5); |
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a = r1(); w0(3); b = r1(); |
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w0(1); c = r1(); w0(0); d = r1(); |
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buf[4*k+2] = j44(d,c); |
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buf[4*k+3] = j44(a,b); |
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} |
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w2(4); |
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} |
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static void fit2_write_block( PIA *pi, char * buf, int count ) |
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{ int k; |
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w2(0xc); w0(0); |
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for (k=0;k<count/2;k++) { |
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w2(4); w0(buf[2*k]); |
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w2(5); w0(buf[2*k+1]); |
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} |
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w2(4); |
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} |
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static void fit2_connect ( PIA *pi ) |
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{ pi->saved_r0 = r0(); |
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pi->saved_r2 = r2(); |
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w2(0xcc); |
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} |
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static void fit2_disconnect ( PIA *pi ) |
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{ w0(pi->saved_r0); |
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w2(pi->saved_r2); |
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} |
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static void fit2_log_adapter( PIA *pi, char * scratch, int verbose ) |
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{ printk("%s: fit2 %s, FIT 2000 adapter at 0x%x, delay %d\n", |
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pi->device,FIT2_VERSION,pi->port,pi->delay); |
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} |
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static struct pi_protocol fit2 = { |
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.owner = THIS_MODULE, |
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.name = "fit2", |
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.max_mode = 1, |
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.epp_first = 2, |
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.default_delay = 1, |
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.max_units = 1, |
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.write_regr = fit2_write_regr, |
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.read_regr = fit2_read_regr, |
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.write_block = fit2_write_block, |
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.read_block = fit2_read_block, |
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.connect = fit2_connect, |
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.disconnect = fit2_disconnect, |
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.log_adapter = fit2_log_adapter, |
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}; |
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static int __init fit2_init(void) |
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{ |
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return paride_register(&fit2); |
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} |
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static void __exit fit2_exit(void) |
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{ |
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paride_unregister(&fit2); |
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} |
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MODULE_LICENSE("GPL"); |
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module_init(fit2_init) |
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module_exit(fit2_exit)
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