1 files changed, 313 insertions, 0 deletions

diff --git a/drivers/block/paride/frpw.c b/drivers/block/paride/frpw.c
new file mode 100644
index 000000000000..56b3824b1538
--- /dev/null
+++ b/drivers/block/paride/frpw.c
@@ -0,0 +1,313 @@
+/* 
+        frpw.c  (c) 1996-8  Grant R. Guenther <grant@torque.net>
+                            Under the terms of the GNU General Public License
+
+        frpw.c is a low-level protocol driver for the Freecom "Power"
+        parallel port IDE adapter.
+        
+        Some applications of this adapter may require a "printer" reset
+        prior to loading the driver.  This can be done by loading and
+        unloading the "lp" driver, or it can be done by this driver
+        if you define FRPW_HARD_RESET.  The latter is not recommended
+        as it may upset devices on other ports.
+
+*/
+
+/* Changes:
+
+        1.01    GRG 1998.05.06 init_proto, release_proto
+                               fix chip detect
+                               added EPP-16 and EPP-32
+        1.02    GRG 1998.09.23 added hard reset to initialisation process
+        1.03    GRG 1998.12.14 made hard reset conditional
+
+*/
+
+#define FRPW_VERSION    "1.03" 
+
+#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 cec4            w2(0xc);w2(0xe);w2(0xe);w2(0xc);w2(4);w2(4);w2(4);
+#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 frpw_read_regr( PIA *pi, int cont, int regr )
+
+{       int     h,l,r;
+
+        r = regr + cont_map[cont];
+
+        w2(4);
+        w0(r); cec4;
+        w2(6); l = r1();
+        w2(4); h = r1();
+        w2(4); 
+
+        return j44(l,h);
+
+}
+
+static void frpw_write_regr( PIA *pi, int cont, int regr, int val)
+
+{       int r;
+
+        r = regr + cont_map[cont];
+
+        w2(4); w0(r); cec4; 
+        w0(val);
+        w2(5);w2(7);w2(5);w2(4);
+}
+
+static void frpw_read_block_int( PIA *pi, char * buf, int count, int regr )
+
+{       int     h, l, k, ph;
+
+        switch(pi->mode) {
+
+        case 0: w2(4); w0(regr); cec4;
+                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;
+                w2(4); w0(regr + 0xc0); cec4;
+                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: w2(4); w0(regr + 0x80); cec4;
+                for (k=0;k<count;k++) buf[k] = r4();
+                w2(0xac); w2(0xa4);
+                w2(4);
+                break;
+
+        case 3: w2(4); w0(regr + 0x80); cec4;
+                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 4: w2(4); w0(regr + 0x80); cec4;
+                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 5: w2(4); w0(regr + 0x80); cec4;
+                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 frpw_read_block( PIA *pi, char * buf, int count)
+
+{       frpw_read_block_int(pi,buf,count,0x08);
+}
+
+static void frpw_write_block( PIA *pi, char * buf, int count )
+ 
+{       int     k;
+
+        switch(pi->mode) {
+
+        case 0:
+        case 1:
+        case 2: w2(4); w0(8); cec4; w2(5);
+                for (k=0;k<count;k++) {
+                        w0(buf[k]);
+                        w2(7);w2(5);
+                }
+                w2(4);
+                break;
+
+        case 3: w2(4); w0(0xc8); cec4; w2(5);
+                for (k=0;k<count;k++) w4(buf[k]);
+                w2(4);
+                break;
+
+        case 4: w2(4); w0(0xc8); cec4; w2(5);
+                for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
+                w2(4);
+                break;
+
+        case 5: w2(4); w0(0xc8); cec4; w2(5);
+                for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
+                w2(4);
+                break;
+        }
+}
+
+static void frpw_connect ( PIA *pi  )
+
+{       pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+        w2(4);
+}
+
+static void frpw_disconnect ( PIA *pi )
+
+{       w2(4); w0(0x20); cec4;
+        w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+/* Stub logic to see if PNP string is available - used to distinguish
+   between the Xilinx and ASIC implementations of the Freecom adapter.
+*/
+
+static int frpw_test_pnp ( PIA *pi )
+
+/*  returns chip_type:   0 = Xilinx, 1 = ASIC   */
+
+{       int olddelay, a, b;
+
+#ifdef FRPW_HARD_RESET
+        w0(0); w2(8); udelay(50); w2(0xc);   /* parallel bus reset */
+        mdelay(1500);
+#endif
+
+        olddelay = pi->delay;
+        pi->delay = 10;
+
+        pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+        
+        w2(4); w0(4); w2(6); w2(7);
+        a = r1() & 0xff; w2(4); b = r1() & 0xff;
+        w2(0xc); w2(0xe); w2(4);
+
+        pi->delay = olddelay;
+        w0(pi->saved_r0);
+        w2(pi->saved_r2);
+
+        return ((~a&0x40) && (b&0x40));
+} 
+
+/* We use the pi->private to remember the result of the PNP test.
+   To make this work, private = port*2 + chip.  Yes, I know it's
+   a hack :-(
+*/
+
+static int frpw_test_proto( PIA *pi, char * scratch, int verbose )
+
+{       int     j, k, r;
+        int     e[2] = {0,0};
+
+        if ((pi->private>>1) != pi->port)
+           pi->private = frpw_test_pnp(pi) + 2*pi->port;
+
+        if (((pi->private%2) == 0) && (pi->mode > 2)) {
+           if (verbose) 
+                printk("%s: frpw: Xilinx does not support mode %d\n",
+                        pi->device, pi->mode);
+           return 1;
+        }
+
+        if (((pi->private%2) == 1) && (pi->mode == 2)) {
+           if (verbose)
+                printk("%s: frpw: ASIC does not support mode 2\n",
+                        pi->device);
+           return 1;
+        }
+
+        frpw_connect(pi);
+        for (j=0;j<2;j++) {
+                frpw_write_regr(pi,0,6,0xa0+j*0x10);
+                for (k=0;k<256;k++) {
+                        frpw_write_regr(pi,0,2,k^0xaa);
+                        frpw_write_regr(pi,0,3,k^0x55);
+                        if (frpw_read_regr(pi,0,2) != (k^0xaa)) e[j]++;
+                        }
+                }
+        frpw_disconnect(pi);
+
+        frpw_connect(pi);
+        frpw_read_block_int(pi,scratch,512,0x10);
+        r = 0;
+        for (k=0;k<128;k++) if (scratch[k] != k) r++;
+        frpw_disconnect(pi);
+
+        if (verbose)  {
+            printk("%s: frpw: port 0x%x, chip %ld, mode %d, test=(%d,%d,%d)\n",
+                   pi->device,pi->port,(pi->private%2),pi->mode,e[0],e[1],r);
+        }
+
+        return (r || (e[0] && e[1]));
+}
+
+
+static void frpw_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       char    *mode_string[6] = {"4-bit","8-bit","EPP",
+                                   "EPP-8","EPP-16","EPP-32"};
+
+        printk("%s: frpw %s, Freecom (%s) adapter at 0x%x, ", pi->device,
+                FRPW_VERSION,((pi->private%2) == 0)?"Xilinx":"ASIC",pi->port);
+        printk("mode %d (%s), delay %d\n",pi->mode,
+                mode_string[pi->mode],pi->delay);
+
+}
+
+static struct pi_protocol frpw = {
+        .owner          = THIS_MODULE,
+        .name           = "frpw",
+        .max_mode       = 6,
+        .epp_first      = 2,
+        .default_delay  = 2,
+        .max_units      = 1,
+        .write_regr     = frpw_write_regr,
+        .read_regr      = frpw_read_regr,
+        .write_block    = frpw_write_block,
+        .read_block     = frpw_read_block,
+        .connect        = frpw_connect,
+        .disconnect     = frpw_disconnect,
+        .test_proto     = frpw_test_proto,
+        .log_adapter    = frpw_log_adapter,
+};
+
+static int __init frpw_init(void)
+{
+        return pi_register(&frpw)-1;
+}
+
+static void __exit frpw_exit(void)
+{
+        pi_unregister(&frpw);
+}
+
+MODULE_LICENSE("GPL");
+module_init(frpw_init)
+module_exit(frpw_exit)