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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [block/] [paride/] [friq.c] - Blame information for rev 1777

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1 1626 jcastillo 
/*
2 
        friq.c  (c) 1998    Grant R. Guenther <grant@torque.net>
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                            Under the terms of the GNU public license
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5 
        friq.c is a low-level protocol driver for the Freecom "IQ"
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        parallel port IDE adapter.   Early versions of this adapter
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        use the 'frpw' protocol.
8 
 
9 
        Freecom uses this adapter in a battery powered external
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        CD-ROM drive.  It is also used in LS-120 drives by
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        Maxell and Panasonic, and other devices.
12 
 
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        The battery powered drive requires software support to
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        control the power to the drive.  This module enables the
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        drive power when the high level driver (pcd) is loaded
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        and disables it when the module is unloaded.  Note, if
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        the friq module is built in to the kernel, the power
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        will never be switched off, so other means should be
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        used to conserve battery power.
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21 
*/
22 
 
23 
/* Changes:
24 
 
25 
        1.01    GRG 1998.12.20   Added support for soft power switch
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*/
27 
 
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#define FRIQ_VERSION    "1.01"
29 
 
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#include <linux/module.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 <asm/io.h>
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#include "paride.h"
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#define CMD(x)          w2(4);w0(0xff);w0(0xff);w0(0x73);w0(0x73);\
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                        w0(0xc9);w0(0xc9);w0(0x26);w0(0x26);w0(x);w0(x);
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#define j44(l,h)        (((l>>4)&0x0f)|(h&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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*/
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static int  cont_map[2] = { 0x08, 0x10 };
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static int friq_read_regr( PIA *pi, int cont, int regr )
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{       int     h,l,r;
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53 
        r = regr + cont_map[cont];
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55 
        CMD(r);
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        w2(6); l = r1();
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        w2(4); h = r1();
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        w2(4);
59 
 
60 
        return j44(l,h);
61 
 
62 
}
63 
 
64 
static void friq_write_regr( PIA *pi, int cont, int regr, int val)
65 
 
66 
{       int r;
67 
 
68 
        r = regr + cont_map[cont];
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70 
        CMD(r);
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        w0(val);
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        w2(5);w2(7);w2(5);w2(4);
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}
74 
 
75 
static void friq_read_block_int( PIA *pi, char * buf, int count, int regr )
76 
 
77 
{       int     h, l, k, ph;
78 
 
79 
        switch(pi->mode) {
80 
 
81 
        case 0: CMD(regr);
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                for (k=0;k<count;k++) {
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                        w2(6); l = r1();
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                        w2(4); h = r1();
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                        buf[k] = j44(l,h);
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                }
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                w2(4);
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                break;
89 
 
90 
        case 1: ph = 2;
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                CMD(regr+0xc0);
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                w0(0xff);
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                for (k=0;k<count;k++) {
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                        w2(0xa4 + ph);
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                        buf[k] = r0();
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                        ph = 2 - ph;
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                }
98 
                w2(0xac); w2(0xa4); w2(4);
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                break;
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101 
        case 2: CMD(regr+0x80);
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                for (k=0;k<count-2;k++) buf[k] = r4();
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                w2(0xac); w2(0xa4);
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                buf[count-2] = r4();
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                buf[count-1] = r4();
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                w2(4);
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                break;
108 
 
109 
        case 3: CMD(regr+0x80);
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                for (k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w();
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                w2(0xac); w2(0xa4);
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                buf[count-2] = r4();
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                buf[count-1] = r4();
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                w2(4);
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                break;
116 
 
117 
        case 4: CMD(regr+0x80);
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                for (k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l();
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                buf[count-4] = r4();
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                buf[count-3] = r4();
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                w2(0xac); w2(0xa4);
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                buf[count-2] = r4();
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                buf[count-1] = r4();
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                w2(4);
125 
                break;
126 
 
127 
        }
128 
}
129 
 
130 
static void friq_read_block( PIA *pi, char * buf, int count)
131 
 
132 
{       friq_read_block_int(pi,buf,count,0x08);
133 
}
134 
 
135 
static void friq_write_block( PIA *pi, char * buf, int count )
136 
 
137 
{       int     k;
138 
 
139 
        switch(pi->mode) {
140 
 
141 
        case 0:
142 
        case 1: CMD(8); w2(5);
143 
                for (k=0;k<count;k++) {
144 
                        w0(buf[k]);
145 
                        w2(7);w2(5);
146 
                }
147 
                w2(4);
148 
                break;
149 
 
150 
        case 2: CMD(0xc8); w2(5);
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                for (k=0;k<count;k++) w4(buf[k]);
152 
                w2(4);
153 
                break;
154 
 
155 
        case 3: CMD(0xc8); w2(5);
156 
                for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
157 
                w2(4);
158 
                break;
159 
 
160 
        case 4: CMD(0xc8); w2(5);
161 
                for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
162 
                w2(4);
163 
                break;
164 
        }
165 
}
166 
 
167 
static void friq_connect ( PIA *pi  )
168 
 
169 
{       pi->saved_r0 = r0();
170 
        pi->saved_r2 = r2();
171 
        w2(4);
172 
}
173 
 
174 
static void friq_disconnect ( PIA *pi )
175 
 
176 
{       CMD(0x20);
177 
        w0(pi->saved_r0);
178 
        w2(pi->saved_r2);
179 
}
180 
 
181 
static int friq_test_proto( PIA *pi, char * scratch, int verbose )
182 
 
183 
{       int     j, k, r;
184 
        int     e[2] = {0,0};
185 
 
186 
        pi->saved_r0 = r0();
187 
        w0(0xff); udelay(20); CMD(0x3d); /* turn the power on */
188 
        udelay(500);
189 
        w0(pi->saved_r0);
190 
 
191 
        friq_connect(pi);
192 
        for (j=0;j<2;j++) {
193 
                friq_write_regr(pi,0,6,0xa0+j*0x10);
194 
                for (k=0;k<256;k++) {
195 
                        friq_write_regr(pi,0,2,k^0xaa);
196 
                        friq_write_regr(pi,0,3,k^0x55);
197 
                        if (friq_read_regr(pi,0,2) != (k^0xaa)) e[j]++;
198 
                        }
199 
                }
200 
        friq_disconnect(pi);
201 
 
202 
        friq_connect(pi);
203 
        friq_read_block_int(pi,scratch,512,0x10);
204 
        r = 0;
205 
        for (k=0;k<128;k++) if (scratch[k] != k) r++;
206 
        friq_disconnect(pi);
207 
 
208 
        if (verbose)  {
209 
            printk("%s: friq: port 0x%x, mode %d, test=(%d,%d,%d)\n",
210 
                   pi->device,pi->port,pi->mode,e[0],e[1],r);
211 
        }
212 
 
213 
        return (r || (e[0] && e[1]));
214 
}
215 
 
216 
 
217 
static void friq_log_adapter( PIA *pi, char * scratch, int verbose )
218 
 
219 
{       char    *mode_string[6] = {"4-bit","8-bit",
220 
                                   "EPP-8","EPP-16","EPP-32"};
221 
 
222 
        printk("%s: friq %s, Freecom IQ ASIC-2 adapter at 0x%x, ", pi->device,
223 
                FRIQ_VERSION,pi->port);
224 
        printk("mode %d (%s), delay %d\n",pi->mode,
225 
                mode_string[pi->mode],pi->delay);
226 
 
227 
        pi->private = 1;
228 
        friq_connect(pi);
229 
        CMD(0x9e);              /* disable sleep timer */
230 
        friq_disconnect(pi);
231 
 
232 
}
233 
 
234 
static void friq_init_proto( PIA *pi)
235 
 
236 
{       MOD_INC_USE_COUNT;
237 
        pi->private = 0;
238 
}
239 
 
240 
static void friq_release_proto( PIA *pi)
241 
 
242 
{       if (pi->private) {              /* turn off the power */
243 
                friq_connect(pi);
244 
                CMD(0x1d); CMD(0x1e);
245 
                friq_disconnect(pi);
246 
                pi->private = 0;
247 
        }
248 
 
249 
        MOD_DEC_USE_COUNT;
250 
}
251 
 
252 
struct pi_protocol friq = {"friq",0,5,2,1,1,
253 
                           friq_write_regr,
254 
                           friq_read_regr,
255 
                           friq_write_block,
256 
                           friq_read_block,
257 
                           friq_connect,
258 
                           friq_disconnect,
259 
                           0,
260 
                           0,
261 
                           friq_test_proto,
262 
                           friq_log_adapter,
263 
                           friq_init_proto,
264 
                           friq_release_proto
265 
                          };
266 
 
267 
 
268 
#ifdef MODULE
269 
 
270 
int     init_module(void)
271 
 
272 
{       return pi_register( &friq ) - 1;
273 
}
274 
 
275 
void    cleanup_module(void)
276 
 
277 
{       pi_unregister( &friq );
278 
}
279 
 
280 
#endif
281 
 
282 
/* end of friq.c */

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