1 files changed, 276 insertions, 0 deletions

diff --git a/drivers/block/paride/friq.c b/drivers/block/paride/friq.c
new file mode 100644
index 000000000000..5ea2904d2815
--- /dev/null
+++ b/drivers/block/paride/friq.c
@@ -0,0 +1,276 @@
+/* 
+        friq.c  (c) 1998    Grant R. Guenther <grant@torque.net>
+                            Under the terms of the GNU General Public License
+
+        friq.c is a low-level protocol driver for the Freecom "IQ"
+        parallel port IDE adapter.   Early versions of this adapter
+        use the 'frpw' protocol.
+        
+        Freecom uses this adapter in a battery powered external 
+        CD-ROM drive.  It is also used in LS-120 drives by
+        Maxell and Panasonic, and other devices.
+
+        The battery powered drive requires software support to
+        control the power to the drive.  This module enables the
+        drive power when the high level driver (pcd) is loaded
+        and disables it when the module is unloaded.  Note, if
+        the friq module is built in to the kernel, the power
+        will never be switched off, so other means should be
+        used to conserve battery power.
+
+*/
+
+/* Changes:
+
+        1.01    GRG 1998.12.20   Added support for soft power switch
+*/
+
+#define FRIQ_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 CMD(x)          w2(4);w0(0xff);w0(0xff);w0(0x73);w0(0x73);\
+                        w0(0xc9);w0(0xc9);w0(0x26);w0(0x26);w0(x);w0(x);
+
+#define j44(l,h)        (((l>>4)&0x0f)|(h&0xf0))
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+*/
+
+static int  cont_map[2] = { 0x08, 0x10 };
+
+static int friq_read_regr( PIA *pi, int cont, int regr )
+
+{       int     h,l,r;
+
+        r = regr + cont_map[cont];
+
+        CMD(r);
+        w2(6); l = r1();
+        w2(4); h = r1();
+        w2(4); 
+
+        return j44(l,h);
+
+}
+
+static void friq_write_regr( PIA *pi, int cont, int regr, int val)
+
+{       int r;
+
+        r = regr + cont_map[cont];
+
+        CMD(r);
+        w0(val);
+        w2(5);w2(7);w2(5);w2(4);
+}
+
+static void friq_read_block_int( PIA *pi, char * buf, int count, int regr )
+
+{       int     h, l, k, ph;
+
+        switch(pi->mode) {
+
+        case 0: CMD(regr); 
+                for (k=0;k<count;k++) {
+                        w2(6); l = r1();
+                        w2(4); h = r1();
+                        buf[k] = j44(l,h);
+                }
+                w2(4);
+                break;
+
+        case 1: ph = 2;
+                CMD(regr+0xc0); 
+                w0(0xff);
+                for (k=0;k<count;k++) {
+                        w2(0xa4 + ph); 
+                        buf[k] = r0();
+                        ph = 2 - ph;
+                } 
+                w2(0xac); w2(0xa4); w2(4);
+                break;
+
+        case 2: CMD(regr+0x80);
+                for (k=0;k<count-2;k++) buf[k] = r4();
+                w2(0xac); w2(0xa4);
+                buf[count-2] = r4();
+                buf[count-1] = r4();
+                w2(4);
+                break;
+
+        case 3: CMD(regr+0x80);
+                for (k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w();
+                w2(0xac); w2(0xa4);
+                buf[count-2] = r4();
+                buf[count-1] = r4();
+                w2(4);
+                break;
+
+        case 4: CMD(regr+0x80);
+                for (k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l();
+                buf[count-4] = r4();
+                buf[count-3] = r4();
+                w2(0xac); w2(0xa4);
+                buf[count-2] = r4();
+                buf[count-1] = r4();
+                w2(4);
+                break;
+
+        }
+}
+
+static void friq_read_block( PIA *pi, char * buf, int count)
+
+{       friq_read_block_int(pi,buf,count,0x08);
+}
+
+static void friq_write_block( PIA *pi, char * buf, int count )
+ 
+{       int     k;
+
+        switch(pi->mode) {
+
+        case 0:
+        case 1: CMD(8); w2(5);
+                for (k=0;k<count;k++) {
+                        w0(buf[k]);
+                        w2(7);w2(5);
+                }
+                w2(4);
+                break;
+
+        case 2: CMD(0xc8); w2(5);
+                for (k=0;k<count;k++) w4(buf[k]);
+                w2(4);
+                break;
+
+        case 3: CMD(0xc8); w2(5);
+                for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
+                w2(4);
+                break;
+
+        case 4: CMD(0xc8); w2(5);
+                for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
+                w2(4);
+                break;
+        }
+}
+
+static void friq_connect ( PIA *pi  )
+
+{       pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+        w2(4);
+}
+
+static void friq_disconnect ( PIA *pi )
+
+{       CMD(0x20);
+        w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static int friq_test_proto( PIA *pi, char * scratch, int verbose )
+
+{       int     j, k, r;
+        int     e[2] = {0,0};
+
+        pi->saved_r0 = r0();    
+        w0(0xff); udelay(20); CMD(0x3d); /* turn the power on */
+        udelay(500);
+        w0(pi->saved_r0);
+
+        friq_connect(pi);
+        for (j=0;j<2;j++) {
+                friq_write_regr(pi,0,6,0xa0+j*0x10);
+                for (k=0;k<256;k++) {
+                        friq_write_regr(pi,0,2,k^0xaa);
+                        friq_write_regr(pi,0,3,k^0x55);
+                        if (friq_read_regr(pi,0,2) != (k^0xaa)) e[j]++;
+                        }
+                }
+        friq_disconnect(pi);
+
+        friq_connect(pi);
+        friq_read_block_int(pi,scratch,512,0x10);
+        r = 0;
+        for (k=0;k<128;k++) if (scratch[k] != k) r++;
+        friq_disconnect(pi);
+
+        if (verbose)  {
+            printk("%s: friq: port 0x%x, mode %d, test=(%d,%d,%d)\n",
+                   pi->device,pi->port,pi->mode,e[0],e[1],r);
+        }
+
+        return (r || (e[0] && e[1]));
+}
+
+
+static void friq_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       char    *mode_string[6] = {"4-bit","8-bit",
+                                   "EPP-8","EPP-16","EPP-32"};
+
+        printk("%s: friq %s, Freecom IQ ASIC-2 adapter at 0x%x, ", pi->device,
+                FRIQ_VERSION,pi->port);
+        printk("mode %d (%s), delay %d\n",pi->mode,
+                mode_string[pi->mode],pi->delay);
+
+        pi->private = 1;
+        friq_connect(pi);
+        CMD(0x9e);              /* disable sleep timer */
+        friq_disconnect(pi);
+
+}
+
+static void friq_release_proto( PIA *pi)
+{
+        if (pi->private) {              /* turn off the power */
+                friq_connect(pi);
+                CMD(0x1d); CMD(0x1e);
+                friq_disconnect(pi);
+                pi->private = 0;
+        }
+}
+
+static struct pi_protocol friq = {
+        .owner          = THIS_MODULE,
+        .name           = "friq",
+        .max_mode       = 5,
+        .epp_first      = 2,
+        .default_delay  = 1,
+        .max_units      = 1,
+        .write_regr     = friq_write_regr,
+        .read_regr      = friq_read_regr,
+        .write_block    = friq_write_block,
+        .read_block     = friq_read_block,
+        .connect        = friq_connect,
+        .disconnect     = friq_disconnect,
+        .test_proto     = friq_test_proto,
+        .log_adapter    = friq_log_adapter,
+        .release_proto  = friq_release_proto,
+};
+
+static int __init friq_init(void)
+{
+        return pi_register(&friq)-1;
+}
+
+static void __exit friq_exit(void)
+{
+        pi_unregister(&friq);
+}
+
+MODULE_LICENSE("GPL");
+module_init(friq_init)
+module_exit(friq_exit)