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301 theseven 1 
/***************************************************************************
2 
 *             __________               __   ___.
3 
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
4 
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
5 
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
6 
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
7 
 *                     \/            \/     \/    \/            \/
8 
 * $Id$
9 
 *
10 
 * Copyright (C) 2007 Dave Chapman
11 
 *
12 
 * This program is free software; you can redistribute it and/or
13 
 * modify it under the terms of the GNU General Public License
14 
 * as published by the Free Software Foundation; either version 2
15 
 * of the License, or (at your option) any later version.
16 
 *
17 
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 
 * KIND, either express or implied.
19 
 *
20 
 ****************************************************************************/
21 
#include "global.h"
22 
#include "thread.h"
23 
#include "disk.h"
24 
#include "storage.h"
25 
#include "timer.h"
26 
#include "../ipodnano3g/s5l8702.h"
27 
 
28 
/** static, private data **/
29 
uint16_t ata_identify_data[0x100];
30 
bool ata_lba48;
31 
bool ata_dma;
32 
uint64_t ata_total_sectors;
33 
static struct mutex ata_mutex;
34 
static struct wakeup ata_wakeup;
35 
static uint32_t ata_dma_flags;
36 
static long ata_last_activity_value = -1;
37 
static long ata_sleep_timeout = 20000000;
38 
static uint32_t ata_stack[0x80];
39 
static bool ata_powered;
40 
 
328 theseven 41 
#ifdef ATA_HAVE_BBT
42 
#include "panic.h"
43 
uint16_t ata_bbt[ATA_BBT_PAGES][0x20];
44 
uint32_t ata_virtual_sectors;
337 theseven 45 
uint32_t ata_last_offset;
46 
uint64_t ata_last_phys;
301 theseven 47 
 
328 theseven 48 
int ata_rw_sectors_internal(uint64_t sector, uint32_t count, void* buffer, bool write);
49 
 
50 
void ata_bbt_read_sectors(uint32_t sector, uint32_t count, void* buffer)
51 
{
52 
    int rc = ata_rw_sectors_internal(sector, count, buffer, false);
53 
    if (IS_ERR(rc))
54 
        panicf(PANIC_KILLTHREAD, "ATA: Error %08X while reading BBT (sector %d, count %d)\n",
55 
               rc, sector, count);
56 
}
57 
#endif
58 
 
59 
 
301 theseven 60 
static uint16_t ata_read_cbr(uint32_t volatile* reg)
61 
{
317 theseven 62 
    while (!(ATA_PIO_READY & 2)) yield();
301 theseven 63 
    volatile uint32_t dummy = *reg;
317 theseven 64 
    while (!(ATA_PIO_READY & 1)) yield();
301 theseven 65 
    return ATA_PIO_RDATA;
66 
}
67 
 
68 
static void ata_write_cbr(uint32_t volatile* reg, uint16_t data)
69 
{
317 theseven 70 
    while (!(ATA_PIO_READY & 2)) yield();
301 theseven 71 
    *reg = data;
72 
}
73 
 
74 
static int ata_wait_for_not_bsy(long timeout)
75 
{
76 
    long startusec = USEC_TIMER;
77 
    while (true)
78 
    {
79 
        uint8_t csd = ata_read_cbr(&ATA_PIO_CSD);
80 
        if (!(csd & BIT(7))) return 0;
81 
        if (TIMEOUT_EXPIRED(startusec, timeout)) RET_ERR(0);
82 
    }
83 
}
84 
 
85 
static int ata_wait_for_rdy(long timeout)
86 
{
87 
    long startusec = USEC_TIMER;
88 
    PASS_RC(ata_wait_for_not_bsy(timeout), 1, 0);
89 
    while (true)
90 
    {
91 
        uint8_t dad = ata_read_cbr(&ATA_PIO_DAD);
92 
        if (dad & BIT(6)) return 0;
93 
        if (TIMEOUT_EXPIRED(startusec, timeout)) RET_ERR(1);
94 
    }
95 
}
96 
 
97 
static int ata_wait_for_start_of_transfer(long timeout)
98 
{
99 
    long startusec = USEC_TIMER;
100 
    PASS_RC(ata_wait_for_not_bsy(timeout), 2, 0);
101 
    while (true)
102 
    {
103 
        uint8_t dad = ata_read_cbr(&ATA_PIO_DAD);
104 
        if (dad & BIT(0)) RET_ERR(1);
105 
        if ((dad & (BIT(7) | BIT(3))) == BIT(3)) return 0;
106 
        if (TIMEOUT_EXPIRED(startusec, timeout)) RET_ERR(2);
107 
    }
108 
}
109 
 
110 
static int ata_wait_for_end_of_transfer(long timeout)
111 
{
112 
    PASS_RC(ata_wait_for_not_bsy(timeout), 2, 0);
113 
    uint8_t dad = ata_read_cbr(&ATA_PIO_DAD);
114 
    if (dad & BIT(0)) RET_ERR(1);
115 
    if ((dad & (BIT(3) | BITRANGE(5, 7))) == BIT(6)) return 0;
116 
    RET_ERR(2);
117 
}
118 
 
119 
int ata_identify(uint16_t* buf)
120 
{
121 
    int i;
122 
    PASS_RC(ata_wait_for_not_bsy(10000000), 1, 0);
123 
    ata_write_cbr(&ATA_PIO_DVR, 0);
124 
    ata_write_cbr(&ATA_PIO_CSD, 0xec);
125 
    PASS_RC(ata_wait_for_start_of_transfer(10000000), 1, 1);
126 
    for (i = 0; i < 0x100; i++)
127 
    {
128 
        uint16_t word = ata_read_cbr(&ATA_PIO_DTR);
129 
        buf[i] = (word >> 8) | (word << 8);
130 
    }
131 
}
132 
 
133 
void ata_set_active(void)
134 
{
135 
    ata_last_activity_value = USEC_TIMER;
136 
}
137 
 
317 theseven 138 
int ata_set_feature(uint32_t feature, uint32_t param)
139 
{
140 
    PASS_RC(ata_wait_for_rdy(500000), 1, 0);
141 
    ata_write_cbr(&ATA_PIO_DVR, 0);
142 
    ata_write_cbr(&ATA_PIO_FED, 3);
143 
    ata_write_cbr(&ATA_PIO_SCR, param);
144 
    ata_write_cbr(&ATA_PIO_CSD, feature);
145 
    PASS_RC(ata_wait_for_rdy(500000), 1, 1);
146 
    return 0;
147 
}
148 
 
301 theseven 149 
int ata_power_up()
150 
{
151 
    ata_set_active();
152 
    i2c_sendbyte(0, 0xe6, 0x1b, 1);
153 
    clockgate_enable(5, true);
154 
    ATA_CFG = BIT(0);
155 
    sleep(1000);
156 
    ATA_CFG = 0;
157 
    sleep(6000);
158 
    ATA_SWRST = BIT(0);
159 
    sleep(500);
160 
    ATA_SWRST = 0;
161 
    sleep(90000);
162 
    ATA_CONTROL = BIT(0);
163 
    sleep(200000);
164 
    ATA_PIO_TIME = 0x191f7;
165 
    ATA_PIO_LHR = 0;
166 
    while (!(ATA_PIO_READY & BIT(1))) sleep(100);
167 
    PASS_RC(ata_identify(ata_identify_data), 2, 0);
168 
    uint32_t piotime = 0x11f3;
169 
    uint32_t mdmatime = 0x1c175;
170 
    uint32_t udmatime = 0x5071152;
171 
    uint32_t param = 0;
172 
    ata_dma_flags = 0;
173 
    ata_lba48 = ata_identify_data[83] & BIT(10) ? true : false;
174 
    if (ata_lba48)
175 
        ata_total_sectors = ata_identify_data[100]
176 
                          | (((uint64_t)ata_identify_data[101]) << 16)
177 
                          | (((uint64_t)ata_identify_data[102]) << 32)
178 
                          | (((uint64_t)ata_identify_data[103]) << 48);
179 
    else ata_total_sectors = ata_identify_data[60] | (((uint32_t)ata_identify_data[61]) << 16);
328 theseven 180 
    ata_total_sectors >>= 3;
301 theseven 181 
    if (ata_identify_data[53] & BIT(1))
182 
    {
183 
        if (ata_identify_data[64] & BIT(1)) piotime = 0x2072;
184 
        else if (ata_identify_data[64] & BIT(0)) piotime = 0x7083;
185 
    }
186 
    if (ata_identify_data[63] & BIT(2))
187 
    {
188 
        mdmatime = 0x5072;
189 
        param = 0x22;
190 
    }
191 
    else if (ata_identify_data[63] & BIT(1))
192 
    {
193 
        mdmatime = 0x7083;
194 
        param = 0x21;
195 
    }
196 
    if (ata_identify_data[63] & BITRANGE(0, 2))
197 
    {
198 
        ata_dma_flags = BIT(3) | BIT(10);
199 
        param |= 0x20;
200 
    }
201 
    if (ata_identify_data[53] & BIT(2))
202 
    {
203 
        if (ata_identify_data[88] & BIT(4))
204 
        {
205 
            udmatime = 0x2010a52;
206 
            param = 0x44;
207 
        }
208 
        else if (ata_identify_data[88] & BIT(3))
209 
        {
210 
            udmatime = 0x2020a52;
211 
            param = 0x43;
212 
        }
213 
        else if (ata_identify_data[88] & BIT(2))
214 
        {
215 
            udmatime = 0x3030a52;
216 
            param = 0x42;
217 
        }
218 
        else if (ata_identify_data[88] & BIT(1))
219 
        {
220 
            udmatime = 0x3050a52;
221 
            param = 0x41;
222 
        }
223 
        if (ata_identify_data[88] & BITRANGE(0, 4))
224 
        {
225 
            ata_dma_flags = BIT(2) | BIT(3) | BIT(9) | BIT(10);
226 
            param |= 0x40;
227 
        }
228 
    }
229 
    ata_dma = param ? true : false;
317 theseven 230 
    PASS_RC(ata_set_feature(0xef, param), 2, 1);
337 theseven 231 
    if (ata_identify_data[82] & BIT(5)) PASS_RC(ata_set_feature(0x02, 0), 2, 2);
232 
    if (ata_identify_data[82] & BIT(6)) PASS_RC(ata_set_feature(0x55, 0), 2, 3);
301 theseven 233 
    ATA_PIO_TIME = piotime;
234 
    ATA_MDMA_TIME = mdmatime;
235 
    ATA_UDMA_TIME = udmatime;
236 
    ata_powered = true;
237 
    ata_set_active();
238 
    return 0;
239 
}
240 
 
241 
void ata_power_down()
242 
{
243 
    ata_powered = false;
244 
    ata_wait_for_rdy(1000000);
245 
    ata_write_cbr(&ATA_PIO_DVR, 0);
246 
    ata_write_cbr(&ATA_PIO_CSD, 0xe0);
247 
    ata_wait_for_rdy(1000000);
248 
    sleep(30000);
249 
    ATA_CONTROL = 0;
317 theseven 250 
    while (!(ATA_CONTROL & BIT(1))) yield();
301 theseven 251 
    clockgate_enable(5, false);
252 
    i2c_sendbyte(0, 0xe6, 0x1b, 0);
253 
}
254 
 
337 theseven 255 
int ata_rw_chunk(uint64_t sector, uint32_t cnt, void* buffer, bool write)
256 
{
257 
    PASS_RC(ata_wait_for_rdy(100000), 2, 0);
258 
    ata_write_cbr(&ATA_PIO_DVR, 0);
259 
    if (ata_lba48)
260 
    {
261 
        ata_write_cbr(&ATA_PIO_SCR, cnt >> 5);
262 
        ata_write_cbr(&ATA_PIO_SCR, (cnt << 3) & 0xff);
263 
        ata_write_cbr(&ATA_PIO_LHR, (sector >> 37) & 0xff);
264 
        ata_write_cbr(&ATA_PIO_LMR, (sector >> 29) & 0xff);
265 
        ata_write_cbr(&ATA_PIO_LLR, (sector >> 21) & 0xff);
266 
        ata_write_cbr(&ATA_PIO_LHR, (sector >> 13) & 0xff);
267 
        ata_write_cbr(&ATA_PIO_LMR, (sector >> 5) & 0xff);
268 
        ata_write_cbr(&ATA_PIO_LLR, (sector << 3) & 0xff);
269 
        ata_write_cbr(&ATA_PIO_DVR, BIT(6));
270 
        if (write) ata_write_cbr(&ATA_PIO_CSD, ata_dma ? 0x35 : 0x39);
271 
        else ata_write_cbr(&ATA_PIO_CSD, ata_dma ? 0x25 : 0x29);
272 
    }
273 
    else
274 
    {
275 
        ata_write_cbr(&ATA_PIO_SCR, (cnt << 3) & 0xff);
276 
        ata_write_cbr(&ATA_PIO_LHR, (sector >> 13) & 0xff);
277 
        ata_write_cbr(&ATA_PIO_LMR, (sector >> 5) & 0xff);
278 
        ata_write_cbr(&ATA_PIO_LLR, (sector << 3) & 0xff);
279 
        ata_write_cbr(&ATA_PIO_DVR, BIT(6) | ((sector >> 21) & 0xf));
280 
        if (write) ata_write_cbr(&ATA_PIO_CSD, ata_dma ? 0xca : 0x30);
281 
        else ata_write_cbr(&ATA_PIO_CSD, ata_dma ? 0xc8 : 0xc4);
282 
    }
283 
    if (ata_dma)
284 
    {
285 
        PASS_RC(ata_wait_for_start_of_transfer(500000), 2, 1);
286 
        if (write)
287 
        {
288 
            ATA_SBUF_START = buffer;
289 
            ATA_SBUF_SIZE = SECTOR_SIZE * cnt;
290 
            ATA_CFG |= BIT(4);
291 
        }
292 
        else
293 
        {
294 
            ATA_TBUF_START = buffer;
295 
            ATA_TBUF_SIZE = SECTOR_SIZE * cnt;
296 
            ATA_CFG &= ~BIT(4);
297 
        }
298 
        ATA_XFR_NUM = SECTOR_SIZE * cnt - 1;
299 
        ATA_CFG |= ata_dma_flags;
300 
        ATA_CFG &= ~(BIT(7) | BIT(8));
301 
        wakeup_wait(&ata_wakeup, TIMEOUT_NONE);
302 
        ATA_IRQ = BITRANGE(0, 4);
303 
        ATA_IRQ_MASK = BIT(0);
304 
        ATA_COMMAND = BIT(0);
305 
        if (wakeup_wait(&ata_wakeup, 500000) == THREAD_TIMEOUT)
306 
        {
307 
            ATA_COMMAND = BIT(1);
308 
            ATA_CFG &= ~(BITRANGE(2, 3) | BIT(12));
309 
            RET_ERR(2);
310 
        }
311 
        ATA_COMMAND = BIT(1);
312 
        ATA_CFG &= ~(BITRANGE(2, 3) | BIT(12));
313 
    }
314 
    else
315 
    {
316 
        cnt *= SECTOR_SIZE / 512;
317 
        while (cnt--)
318 
        {
319 
            int i;
320 
            PASS_RC(ata_wait_for_start_of_transfer(500000), 2, 1);
321 
            if (write)
322 
                for (i = 0; i < 256; i++)
323 
                    ata_write_cbr(&ATA_PIO_DTR, ((uint16_t*)buffer)[i]);
324 
            else
325 
                for (i = 0; i < 256; i++)
326 
                    ((uint16_t*)buffer)[i] = ata_read_cbr(&ATA_PIO_DTR);
327 
            buffer += 512;
328 
        }
329 
    }
330 
    PASS_RC(ata_wait_for_end_of_transfer(100000), 2, 3);
331 
    return 0;
332 
}
333 
 
301 theseven 334 
int ata_rw_sectors(uint64_t sector, uint32_t count, void* buffer, bool write)
335 
{
328 theseven 336 
#ifdef ATA_HAVE_BBT
337 
    if (sector + count > ata_virtual_sectors) RET_ERR(0);
338 
    while (count)
339 
    {
337 theseven 340 
        uint32_t offset;
328 theseven 341 
        uint32_t l0idx = sector >> 15;
342 
        uint32_t l0offs = sector & 0x7fff;
343 
        uint32_t cnt = MIN(count, 0x8000 - l0offs);
344 
        uint32_t l0data = ata_bbt[0][l0idx << 1];
345 
        uint32_t base = ata_bbt[0][(l0idx << 1) | 1] << 12;
337 theseven 346 
        if (l0data < 0x8000) offset = l0data + base;
328 theseven 347 
        else
348 
        {
349 
            uint32_t l1idx = (sector >> 10) & 0x1f;
350 
            uint32_t l1offs = sector & 0x3ff;
351 
            cnt = MIN(count, 0x400 - l1offs);
352 
            uint32_t l1data = ata_bbt[l0data & 0x7fff][l1idx];
337 theseven 353 
            if (l1data < 0x8000) offset = l1data + base;
328 theseven 354 
            else
355 
            {
356 
                uint32_t l2idx = (sector >> 5) & 0x1f;
357 
                uint32_t l2offs = sector & 0x1f;
358 
                cnt = MIN(count, 0x20 - l2offs);
359 
                uint32_t l2data = ata_bbt[l1data & 0x7fff][l2idx];
337 theseven 360 
                if (l2data < 0x8000) offset = l2data + base;
328 theseven 361 
                else
362 
                {
363 
                    uint32_t l3idx = sector & 0x1f;
337 theseven 364 
                    uint32_t l3data = ata_bbt[l2data & 0x7fff][l3idx];
328 theseven 365 
                    for (cnt = 1; cnt < count && l3idx + cnt < 0x20; cnt++)
337 theseven 366 
                        if (ata_bbt[l2data & 0x7fff][l3idx + cnt] != l3data)
328 theseven 367 
                            break;
337 theseven 368 
                    offset = l3data + base;
328 theseven 369 
                }
370 
            }
371 
        }
337 theseven 372 
        uint64_t phys = sector + offset;
373 
        if (offset != ata_last_offset && phys - ata_last_phys < 64) ata_soft_reset();
374 
        ata_last_offset = offset;
375 
        ata_last_phys = phys + cnt;
328 theseven 376 
        PASS_RC(ata_rw_sectors_internal(phys, cnt, buffer, write), 0, 0);
377 
        buffer += cnt * SECTOR_SIZE;
378 
        sector += cnt;
379 
        count -= cnt;
380 
    }
381 
    return 0;
382 
}
383 
 
384 
int ata_rw_sectors_internal(uint64_t sector, uint32_t count, void* buffer, bool write)
385 
{
386 
#endif
301 theseven 387 
    if (sector + count > ata_total_sectors) RET_ERR(0);
388 
    if (!ata_powered) ata_power_up();
389 
    ata_set_active();
390 
    if (ata_dma && write) clean_dcache();
391 
    else if (ata_dma) invalidate_dcache();
392 
    ATA_COMMAND = BIT(1);
393 
    while (count)
394 
    {
317 theseven 395 
        uint32_t cnt = MIN(ata_lba48 ? 8192 : 32, count);
337 theseven 396 
        int rc = -1;
397 
        int tries = 3;
398 
        while (tries-- && rc)
301 theseven 399 
        {
337 theseven 400 
            rc = ata_rw_chunk(sector, cnt, buffer, write);
401 
            if (rc) ata_soft_reset();
301 theseven 402 
        }
337 theseven 403 
        if (rc)
301 theseven 404 
        {
337 theseven 405 
            void* buf = buffer;
406 
            int sect;
407 
            for (sect = sector; sect < sector + cnt; sect++)
408 
            {
409 
                rc = -1;
410 
                tries = 3;
411 
                while (tries-- && rc)
412 
                {
413 
                    rc = ata_rw_chunk(sect, 1, buf, write);
414 
                    if (rc) ata_soft_reset();
415 
                }
416 
                if (rc) break;
417 
                buf += SECTOR_SIZE;
418 
            }
301 theseven 419 
        }
337 theseven 420 
        PASS_RC(rc, 1, 1);
421 
        buffer += SECTOR_SIZE * cnt;
301 theseven 422 
        sector += cnt;
423 
        count -= cnt;
424 
    }
425 
    ata_set_active();
426 
    return 0;
427 
}
428 
 
429 
static void ata_thread(void)
430 
{
431 
    while (true)
432 
    {
433 
        mutex_lock(&ata_mutex, TIMEOUT_BLOCK);
434 
        if (TIME_AFTER(USEC_TIMER, ata_last_activity_value + ata_sleep_timeout) && ata_powered)
435 
            ata_power_down();
436 
        mutex_unlock(&ata_mutex);
437 
        sleep(1000000);
438 
    }
439 
}
440 
 
441 
/* API Functions */
442 
int ata_soft_reset()
443 
{
444 
    mutex_lock(&ata_mutex, TIMEOUT_BLOCK);
445 
    if (!ata_powered) ata_power_up();
446 
    ata_set_active();
447 
    ata_write_cbr(&ATA_PIO_DAD, BIT(1) | BIT(2));
448 
    sleep(10);
449 
    ata_write_cbr(&ATA_PIO_DAD, 0);
337 theseven 450 
    PASS_RC_MTX(ata_wait_for_rdy(60000000), 0, 0, &ata_mutex);
301 theseven 451 
    ata_set_active();
452 
    mutex_unlock(&ata_mutex);
453 
}
454 
 
455 
int ata_read_sectors(IF_MD2(int drive,) unsigned long start, int incount,
456 
                     void* inbuf)
457 
{
458 
    mutex_lock(&ata_mutex, TIMEOUT_BLOCK);
337 theseven 459 
    int rc = ata_rw_sectors(start, incount, inbuf, false);
301 theseven 460 
    mutex_unlock(&ata_mutex);
461 
    return rc;
462 
}
463 
 
464 
int ata_write_sectors(IF_MD2(int drive,) unsigned long start, int count,
465 
                      const void* outbuf)
466 
{
467 
    mutex_lock(&ata_mutex, TIMEOUT_BLOCK);
337 theseven 468 
    int rc = ata_rw_sectors(start, count, (void*)((uint32_t)outbuf), true);
301 theseven 469 
    mutex_unlock(&ata_mutex);
470 
    return rc;
471 
}
472 
 
337 theseven 473 
void ata_spindown(int seconds)
474 
{
475 
    ata_sleep_timeout = seconds * 1000000;
476 
}
301 theseven 477 
 
478 
void ata_sleep(void)
479 
{
480 
    mutex_lock(&ata_mutex, TIMEOUT_BLOCK);
481 
    ata_power_down();
482 
    mutex_unlock(&ata_mutex);
483 
}
484 
 
485 
void ata_sleepnow(void)
486 
{
487 
    ata_sleep();
488 
}
489 
 
490 
void ata_close(void)
491 
{
492 
    ata_sleep();
493 
}
494 
 
495 
void ata_spin(void)
496 
{
497 
    ata_power_up();
498 
}
499 
 
500 
void ata_get_info(IF_MD2(int drive,) struct storage_info *info)
501 
{
502 
    (*info).sector_size = SECTOR_SIZE;
328 theseven 503 
#ifdef ATA_HAVE_BBT
504 
    (*info).num_sectors = ata_virtual_sectors;
505 
#else
301 theseven 506 
    (*info).num_sectors = ata_total_sectors;
328 theseven 507 
#endif
301 theseven 508 
    (*info).vendor = "Apple";
509 
    (*info).product = "iPod Classic";
510 
    (*info).revision = "1.0";
511 
}
512 
 
513 
long ata_last_disk_activity(void)
514 
{
515 
    return ata_last_activity_value;
516 
}
517 
 
518 
int ata_init(void)
519 
{
520 
    mutex_init(&ata_mutex);
521 
    wakeup_init(&ata_wakeup);
522 
    PCON(7) = 0x44444444;
523 
    PCON(8) = 0x44444444;
524 
    PCON(9) = 0x44444444;
525 
    PCON(10) = (PCON(10) & ~0xffff) | 0x4444;
526 
    ata_powered = false;
527 
    ata_total_sectors = 0;
328 theseven 528 
#ifdef ATA_HAVE_BBT
529 
    mutex_lock(&ata_mutex, TIMEOUT_BLOCK);
530 
    memset(ata_bbt, 0, sizeof(ata_bbt));
531 
    ata_power_up();
532 
    uint32_t* buf = (uint32_t*)(ata_bbt[ARRAYLEN(ata_bbt) - 64]);
533 
    ata_bbt_read_sectors(0, 1, buf);
534 
    if (!memcmp(buf, "emBIbbth", 8))
535 
    {
536 
        ata_virtual_sectors = buf[0x1fe];
537 
        uint32_t count = buf[0x1ff];
538 
        if (count > (ATA_BBT_PAGES >> 6))
337 theseven 539 
            panicf(PANIC_KILLTHREAD, "ATA: BBT too big! (%d pages, limit: %d)\n", count << 6, ATA_BBT_PAGES);
328 theseven 540 
        uint32_t i;
541 
        uint32_t cnt;
542 
        for (i = 0; i < count; i += cnt)
543 
        {
544 
            uint32_t phys = buf[0x200 + i];
545 
            for (cnt = 1; cnt < count; cnt++)
546 
                if (buf[0x200 + i + cnt] != phys + cnt)
547 
                    break;
548 
            ata_bbt_read_sectors(phys, cnt, ata_bbt[i << 6]);
549 
        }
550 
    }
551 
    else ata_virtual_sectors = ata_total_sectors;
552 
    mutex_unlock(&ata_mutex);
553 
#endif
301 theseven 554 
    thread_create("ATA idle monitor", ata_thread, ata_stack,
555 
                  sizeof(ata_stack), USER_THREAD, 1, true);
556 
    return 0;
557 
}
558 
 
559 
#ifdef CONFIG_STORAGE_MULTI
560 
int ata_num_drives(int first_drive)
561 
{
562 
    /* We don't care which logical drive number(s) we have been assigned */
563 
    (void)first_drive;
564 
 
565 
    return 1;
566 
}
567 
#endif
568 
 
569 
void INT_ATA()
570 
{
571 
    uint32_t ata_irq = ATA_IRQ;
572 
    ATA_IRQ = ata_irq;
573 
    if (ata_irq & ATA_IRQ_MASK) wakeup_signal(&ata_wakeup);
574 
    ATA_IRQ_MASK = 0;
575 
}