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1.1 root 1: // Low level ATA disk access
2: //
3: // Copyright (C) 2008,2009 Kevin O'Connor <[email protected]>
4: // Copyright (C) 2002 MandrakeSoft S.A.
5: //
6: // This file may be distributed under the terms of the GNU LGPLv3 license.
7:
8: #include "types.h" // u8
9: #include "ioport.h" // inb
10: #include "util.h" // dprintf
11: #include "cmos.h" // inb_cmos
12: #include "pic.h" // enable_hwirq
13: #include "biosvar.h" // GET_EBDA
14: #include "pci.h" // foreachpci
15: #include "pci_ids.h" // PCI_CLASS_STORAGE_OTHER
16: #include "pci_regs.h" // PCI_INTERRUPT_LINE
17: #include "boot.h" // add_bcv_hd
18: #include "disk.h" // struct ata_s
19: #include "ata.h" // ATA_CB_STAT
20:
21: #define IDE_TIMEOUT 32000 //32 seconds max for IDE ops
22:
23: struct ata_channel_s ATA_channels[CONFIG_MAX_ATA_INTERFACES] VAR16VISIBLE;
24:
25:
26: /****************************************************************
27: * Helper functions
28: ****************************************************************/
29:
30: // Wait for the specified ide state
31: static inline int
32: await_ide(u8 mask, u8 flags, u16 base, u16 timeout)
33: {
34: u64 end = calc_future_tsc(timeout);
35: for (;;) {
36: u8 status = inb(base+ATA_CB_STAT);
37: if ((status & mask) == flags)
38: return status;
39: if (check_time(end)) {
40: dprintf(1, "IDE time out\n");
41: return -1;
42: }
43: yield();
44: }
45: }
46:
47: // Wait for the device to be not-busy.
48: static int
49: await_not_bsy(u16 base)
50: {
51: return await_ide(ATA_CB_STAT_BSY, 0, base, IDE_TIMEOUT);
52: }
53:
54: // Wait for the device to be ready.
55: static int
56: await_rdy(u16 base)
57: {
58: return await_ide(ATA_CB_STAT_RDY, ATA_CB_STAT_RDY, base, IDE_TIMEOUT);
59: }
60:
61: // Wait for ide state - pauses for one ata cycle first.
62: static inline int
63: pause_await_not_bsy(u16 iobase1, u16 iobase2)
64: {
65: // Wait one PIO transfer cycle.
66: inb(iobase2 + ATA_CB_ASTAT);
67:
68: return await_not_bsy(iobase1);
69: }
70:
71: // Wait for ide state - pause for 400ns first.
72: static inline int
73: ndelay_await_not_bsy(u16 iobase1)
74: {
75: ndelay(400);
76: return await_not_bsy(iobase1);
77: }
78:
79: // Reset a drive
80: static void
81: ata_reset(struct drive_s *drive_g)
82: {
83: u8 ataid = GET_GLOBAL(drive_g->cntl_id);
84: u8 channel = ataid / 2;
85: u8 slave = ataid % 2;
86: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
87: u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
88:
89: dprintf(6, "ata_reset drive=%p\n", drive_g);
90: // Pulse SRST
91: outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC);
92: udelay(5);
93: outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
94: msleep(2);
95:
96: // wait for device to become not busy.
97: int status = await_not_bsy(iobase1);
98: if (status < 0)
99: goto done;
100: if (slave) {
101: // Change device.
102: u64 end = calc_future_tsc(IDE_TIMEOUT);
103: for (;;) {
104: outb(ATA_CB_DH_DEV1, iobase1 + ATA_CB_DH);
105: status = ndelay_await_not_bsy(iobase1);
106: if (status < 0)
107: goto done;
108: if (inb(iobase1 + ATA_CB_DH) == ATA_CB_DH_DEV1)
109: break;
110: // Change drive request failed to take effect - retry.
111: if (check_time(end)) {
112: dprintf(1, "ata_reset slave time out\n");
113: goto done;
114: }
115: }
116: } else {
117: // QEMU doesn't reset dh on reset, so set it explicitly.
118: outb(ATA_CB_DH_DEV0, iobase1 + ATA_CB_DH);
119: }
120:
121: // On a user-reset request, wait for RDY if it is an ATA device.
122: u8 type=GET_GLOBAL(drive_g->type);
123: if (type == DTYPE_ATA)
124: status = await_rdy(iobase1);
125:
126: done:
127: // Enable interrupts
128: outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
129:
130: dprintf(6, "ata_reset exit status=%x\n", status);
131: }
132:
133: static int
134: isready(struct drive_s *drive_g)
135: {
136: // Read the status from controller
137: u8 ataid = GET_GLOBAL(drive_g->cntl_id);
138: u8 channel = ataid / 2;
139: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
140: u8 status = inb(iobase1 + ATA_CB_STAT);
141: if ((status & (ATA_CB_STAT_BSY|ATA_CB_STAT_RDY)) == ATA_CB_STAT_RDY)
142: return DISK_RET_SUCCESS;
143: return DISK_RET_ENOTREADY;
144: }
145:
146: static int
147: process_ata_misc_op(struct disk_op_s *op)
148: {
149: if (!CONFIG_ATA)
150: return 0;
151:
152: switch (op->command) {
153: case CMD_RESET:
154: ata_reset(op->drive_g);
155: return DISK_RET_SUCCESS;
156: case CMD_ISREADY:
157: return isready(op->drive_g);
158: case CMD_FORMAT:
159: case CMD_VERIFY:
160: case CMD_SEEK:
161: return DISK_RET_SUCCESS;
162: default:
163: op->count = 0;
164: return DISK_RET_EPARAM;
165: }
166: }
167:
168:
169: /****************************************************************
170: * ATA send command
171: ****************************************************************/
172:
173: struct ata_pio_command {
174: u8 feature;
175: u8 sector_count;
176: u8 lba_low;
177: u8 lba_mid;
178: u8 lba_high;
179: u8 device;
180: u8 command;
181:
182: u8 sector_count2;
183: u8 lba_low2;
184: u8 lba_mid2;
185: u8 lba_high2;
186: };
187:
188: // Send an ata command to the drive.
189: static int
190: send_cmd(struct drive_s *drive_g, struct ata_pio_command *cmd)
191: {
192: u8 ataid = GET_GLOBAL(drive_g->cntl_id);
193: u8 channel = ataid / 2;
194: u8 slave = ataid % 2;
195: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
196:
197: // Select device
198: int status = await_not_bsy(iobase1);
199: if (status < 0)
200: return status;
201: u8 newdh = ((cmd->device & ~ATA_CB_DH_DEV1)
202: | (slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0));
203: u8 olddh = inb(iobase1 + ATA_CB_DH);
204: outb(newdh, iobase1 + ATA_CB_DH);
205: if ((olddh ^ newdh) & (1<<4)) {
206: // Was a device change - wait for device to become not busy.
207: status = ndelay_await_not_bsy(iobase1);
208: if (status < 0)
209: return status;
210: }
211:
212: if (cmd->command == ATA_CMD_READ_SECTORS_EXT
213: || cmd->command == ATA_CMD_WRITE_SECTORS_EXT) {
214: outb(0x00, iobase1 + ATA_CB_FR);
215: outb(cmd->sector_count2, iobase1 + ATA_CB_SC);
216: outb(cmd->lba_low2, iobase1 + ATA_CB_SN);
217: outb(cmd->lba_mid2, iobase1 + ATA_CB_CL);
218: outb(cmd->lba_high2, iobase1 + ATA_CB_CH);
219: }
220: outb(cmd->feature, iobase1 + ATA_CB_FR);
221: outb(cmd->sector_count, iobase1 + ATA_CB_SC);
222: outb(cmd->lba_low, iobase1 + ATA_CB_SN);
223: outb(cmd->lba_mid, iobase1 + ATA_CB_CL);
224: outb(cmd->lba_high, iobase1 + ATA_CB_CH);
225: outb(cmd->command, iobase1 + ATA_CB_CMD);
226:
227: status = ndelay_await_not_bsy(iobase1);
228: if (status < 0)
229: return status;
230:
231: if (status & ATA_CB_STAT_ERR) {
232: dprintf(6, "send_cmd : read error (status=%02x err=%02x)\n"
233: , status, inb(iobase1 + ATA_CB_ERR));
234: return -4;
235: }
236: if (!(status & ATA_CB_STAT_DRQ)) {
237: dprintf(6, "send_cmd : DRQ not set (status %02x)\n", status);
238: return -5;
239: }
240:
241: return 0;
242: }
243:
244:
245: /****************************************************************
246: * ATA transfers
247: ****************************************************************/
248:
249: // Transfer 'op->count' blocks (of 'blocksize' bytes) to/from drive
250: // 'op->drive_g'.
251: static int
252: ata_transfer(struct disk_op_s *op, int iswrite, int blocksize)
253: {
254: dprintf(16, "ata_transfer id=%p write=%d count=%d bs=%d buf=%p\n"
255: , op->drive_g, iswrite, op->count, blocksize, op->buf_fl);
256:
257: u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
258: u8 channel = ataid / 2;
259: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
260: u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
261: int count = op->count;
262: void *buf_fl = op->buf_fl;
263: int status;
264: for (;;) {
265: if (iswrite) {
266: // Write data to controller
267: dprintf(16, "Write sector id=%p dest=%p\n", op->drive_g, buf_fl);
268: if (CONFIG_ATA_PIO32)
269: outsl_fl(iobase1, buf_fl, blocksize / 4);
270: else
271: outsw_fl(iobase1, buf_fl, blocksize / 2);
272: } else {
273: // Read data from controller
274: dprintf(16, "Read sector id=%p dest=%p\n", op->drive_g, buf_fl);
275: if (CONFIG_ATA_PIO32)
276: insl_fl(iobase1, buf_fl, blocksize / 4);
277: else
278: insw_fl(iobase1, buf_fl, blocksize / 2);
279: }
280: buf_fl += blocksize;
281:
282: status = pause_await_not_bsy(iobase1, iobase2);
283: if (status < 0) {
284: // Error
285: op->count -= count;
286: return status;
287: }
288:
289: count--;
290: if (!count)
291: break;
292: status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR);
293: if (status != ATA_CB_STAT_DRQ) {
294: dprintf(6, "ata_transfer : more sectors left (status %02x)\n"
295: , status);
296: op->count -= count;
297: return -6;
298: }
299: }
300:
301: status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ
302: | ATA_CB_STAT_ERR);
303: if (!iswrite)
304: status &= ~ATA_CB_STAT_DF;
305: if (status != 0) {
306: dprintf(6, "ata_transfer : no sectors left (status %02x)\n", status);
307: return -7;
308: }
309:
310: return 0;
311: }
312:
313:
314: /****************************************************************
315: * ATA hard drive functions
316: ****************************************************************/
317:
318: // Read/write count blocks from a harddrive.
319: static int
320: ata_cmd_data(struct disk_op_s *op, int iswrite, int command)
321: {
322: u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
323: u8 channel = ataid / 2;
324: u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
325: u64 lba = op->lba;
326:
327: struct ata_pio_command cmd;
328: memset(&cmd, 0, sizeof(cmd));
329:
330: cmd.command = command;
331: if (op->count >= (1<<8) || lba + op->count >= (1<<28)) {
332: cmd.sector_count2 = op->count >> 8;
333: cmd.lba_low2 = lba >> 24;
334: cmd.lba_mid2 = lba >> 32;
335: cmd.lba_high2 = lba >> 40;
336:
337: cmd.command |= 0x04;
338: lba &= 0xffffff;
339: }
340:
341: cmd.feature = 0;
342: cmd.sector_count = op->count;
343: cmd.lba_low = lba;
344: cmd.lba_mid = lba >> 8;
345: cmd.lba_high = lba >> 16;
346: cmd.device = ((lba >> 24) & 0xf) | ATA_CB_DH_LBA;
347:
348: // Disable interrupts
349: outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
350:
351: int ret = send_cmd(op->drive_g, &cmd);
352: if (ret)
353: goto fail;
354: ret = ata_transfer(op, iswrite, DISK_SECTOR_SIZE);
355:
356: fail:
357: // Enable interrupts
358: outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
359: return ret;
360: }
361:
362: int
363: process_ata_op(struct disk_op_s *op)
364: {
365: if (!CONFIG_ATA)
366: return 0;
367:
368: int ret;
369: switch (op->command) {
370: case CMD_READ:
371: ret = ata_cmd_data(op, 0, ATA_CMD_READ_SECTORS);
372: break;
373: case CMD_WRITE:
374: ret = ata_cmd_data(op, 1, ATA_CMD_WRITE_SECTORS);
375: break;
376: default:
377: return process_ata_misc_op(op);
378: }
379: if (ret)
380: return DISK_RET_EBADTRACK;
381: return DISK_RET_SUCCESS;
382: }
383:
384:
385: /****************************************************************
386: * ATAPI functions
387: ****************************************************************/
388:
389: // Low-level atapi command transmit function.
390: static int
391: atapi_cmd_data(struct disk_op_s *op, u8 *cmdbuf, u8 cmdlen, u16 blocksize)
392: {
393: u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
394: u8 channel = ataid / 2;
395: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
396: u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
397:
398: struct ata_pio_command cmd;
399: cmd.sector_count = 0;
400: cmd.feature = 0;
401: cmd.lba_low = 0;
402: cmd.lba_mid = blocksize;
403: cmd.lba_high = blocksize >> 8;
404: cmd.device = 0;
405: cmd.command = ATA_CMD_PACKET;
406:
407: // Disable interrupts
408: outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
409:
410: int ret = send_cmd(op->drive_g, &cmd);
411: if (ret)
412: goto fail;
413:
414: // Send command to device
415: outsw_fl(iobase1, MAKE_FLATPTR(GET_SEG(SS), cmdbuf), cmdlen / 2);
416:
417: int status = pause_await_not_bsy(iobase1, iobase2);
418: if (status < 0) {
419: ret = status;
420: goto fail;
421: }
422:
423: if (status & ATA_CB_STAT_ERR) {
424: u8 err = inb(iobase1 + ATA_CB_ERR);
425: // skip "Not Ready"
426: if (err != 0x20)
427: dprintf(6, "send_atapi_cmd : read error (status=%02x err=%02x)\n"
428: , status, err);
429: ret = -2;
430: goto fail;
431: }
432: if (!(status & ATA_CB_STAT_DRQ)) {
433: dprintf(6, "send_atapi_cmd : DRQ not set (status %02x)\n", status);
434: ret = -3;
435: goto fail;
436: }
437:
438: ret = ata_transfer(op, 0, blocksize);
439:
440: fail:
441: // Enable interrupts
442: outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
443: return ret;
444: }
445:
446: // Read sectors from the cdrom.
447: int
448: cdrom_read(struct disk_op_s *op)
449: {
450: u8 atacmd[12];
451: memset(atacmd, 0, sizeof(atacmd));
452: atacmd[0]=0x28; // READ command
453: atacmd[7]=(op->count & 0xff00) >> 8; // Sectors
454: atacmd[8]=(op->count & 0x00ff);
455: atacmd[2]=(op->lba & 0xff000000) >> 24; // LBA
456: atacmd[3]=(op->lba & 0x00ff0000) >> 16;
457: atacmd[4]=(op->lba & 0x0000ff00) >> 8;
458: atacmd[5]=(op->lba & 0x000000ff);
459:
460: return atapi_cmd_data(op, atacmd, sizeof(atacmd), CDROM_SECTOR_SIZE);
461: }
462:
463: int
464: process_atapi_op(struct disk_op_s *op)
465: {
466: int ret;
467: switch (op->command) {
468: case CMD_READ:
469: ret = cdrom_read(op);
470: break;
471: case CMD_FORMAT:
472: case CMD_WRITE:
473: return DISK_RET_EWRITEPROTECT;
474: default:
475: return process_ata_misc_op(op);
476: }
477: if (ret)
478: return DISK_RET_EBADTRACK;
479: return DISK_RET_SUCCESS;
480: }
481:
482: // Send a simple atapi command to a drive.
483: int
484: ata_cmd_packet(struct drive_s *drive_g, u8 *cmdbuf, u8 cmdlen
485: , u32 length, void *buf_fl)
486: {
487: struct disk_op_s dop;
488: memset(&dop, 0, sizeof(dop));
489: dop.drive_g = drive_g;
490: dop.count = 1;
491: dop.buf_fl = buf_fl;
492:
493: return atapi_cmd_data(&dop, cmdbuf, cmdlen, length);
494: }
495:
496:
497: /****************************************************************
498: * ATA detect and init
499: ****************************************************************/
500:
501: // Extract the ATA/ATAPI version info.
502: static int
503: extract_version(u16 *buffer)
504: {
505: // Extract ATA/ATAPI version.
506: u16 ataversion = buffer[80];
507: u8 version;
508: for (version=15; version>0; version--)
509: if (ataversion & (1<<version))
510: break;
511: return version;
512: }
513:
514: // Extract common information from IDENTIFY commands.
515: static void
516: extract_identify(struct drive_s *drive_g, u16 *buffer)
517: {
518: dprintf(3, "Identify w0=%x w2=%x\n", buffer[0], buffer[2]);
519:
520: // Read model name
521: char *model = drive_g->model;
522: int maxsize = ARRAY_SIZE(drive_g->model);
523: int i;
524: for (i=0; i<maxsize/2; i++) {
525: u16 v = buffer[27+i];
526: model[i*2] = v >> 8;
527: model[i*2+1] = v & 0xff;
528: }
529: model[maxsize-1] = 0x00;
530:
531: // Trim trailing spaces from model name.
532: for (i=maxsize-2; i>0 && model[i] == 0x20; i--)
533: model[i] = 0x00;
534:
535: // Common flags.
536: SET_GLOBAL(drive_g->removable, (buffer[0] & 0x80) ? 1 : 0);
537: SET_GLOBAL(drive_g->cntl_info, extract_version(buffer));
538: }
539:
540: void
541: describe_atapi(struct drive_s *drive_g)
542: {
543: u8 ataid = drive_g->cntl_id;
544: u8 channel = ataid / 2;
545: u8 slave = ataid % 2;
546: u8 version = drive_g->cntl_info;
547: int iscd = drive_g->floppy_type;
548: printf("ata%d-%d: %s ATAPI-%d %s", channel, slave
549: , drive_g->model, version
550: , (iscd ? "CD-Rom/DVD-Rom" : "Device"));
551: }
552:
553: static struct drive_s *
554: init_drive_atapi(struct drive_s *dummy, u16 *buffer)
555: {
556: // Send an IDENTIFY_DEVICE_PACKET command to device
557: memset(buffer, 0, DISK_SECTOR_SIZE);
558: struct disk_op_s dop;
559: memset(&dop, 0, sizeof(dop));
560: dop.drive_g = dummy;
561: dop.count = 1;
562: dop.lba = 1;
563: dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
564: int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE_PACKET);
565: if (ret)
566: return NULL;
567:
568: // Success - setup as ATAPI.
569: struct drive_s *drive_g = allocDrive();
570: if (! drive_g)
571: return NULL;
572: SET_GLOBAL(drive_g->cntl_id, dummy->cntl_id);
573: extract_identify(drive_g, buffer);
574: SET_GLOBAL(drive_g->type, DTYPE_ATAPI);
575: SET_GLOBAL(drive_g->blksize, CDROM_SECTOR_SIZE);
576: SET_GLOBAL(drive_g->sectors, (u64)-1);
577: u8 iscd = ((buffer[0] >> 8) & 0x1f) == 0x05;
578: SET_GLOBAL(drive_g->floppy_type, iscd);
579:
580: // fill cdidmap
581: if (iscd)
582: map_cd_drive(drive_g);
583:
584: return drive_g;
585: }
586:
587: void
588: describe_ata(struct drive_s *drive_g)
589: {
590: u8 ataid = drive_g->cntl_id;
591: u8 channel = ataid / 2;
592: u8 slave = ataid % 2;
593: u64 sectors = drive_g->sectors;
594: u8 version = drive_g->cntl_info;
595: char *model = drive_g->model;
596: printf("ata%d-%d: %s ATA-%d Hard-Disk", channel, slave, model, version);
597: u64 sizeinmb = sectors >> 11;
598: if (sizeinmb < (1 << 16))
599: printf(" (%u MiBytes)", (u32)sizeinmb);
600: else
601: printf(" (%u GiBytes)", (u32)(sizeinmb >> 10));
602: }
603:
604: static struct drive_s *
605: init_drive_ata(struct drive_s *dummy, u16 *buffer)
606: {
607: // Send an IDENTIFY_DEVICE command to device
608: memset(buffer, 0, DISK_SECTOR_SIZE);
609: struct disk_op_s dop;
610: memset(&dop, 0, sizeof(dop));
611: dop.drive_g = dummy;
612: dop.count = 1;
613: dop.lba = 1;
614: dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
615: int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE);
616: if (ret)
617: return NULL;
618:
619: // Success - setup as ATA.
620: struct drive_s *drive_g = allocDrive();
621: if (! drive_g)
622: return NULL;
623: SET_GLOBAL(drive_g->cntl_id, dummy->cntl_id);
624: extract_identify(drive_g, buffer);
625: SET_GLOBAL(drive_g->type, DTYPE_ATA);
626: SET_GLOBAL(drive_g->blksize, DISK_SECTOR_SIZE);
627:
628: SET_GLOBAL(drive_g->pchs.cylinders, buffer[1]);
629: SET_GLOBAL(drive_g->pchs.heads, buffer[3]);
630: SET_GLOBAL(drive_g->pchs.spt, buffer[6]);
631:
632: u64 sectors;
633: if (buffer[83] & (1 << 10)) // word 83 - lba48 support
634: sectors = *(u64*)&buffer[100]; // word 100-103
635: else
636: sectors = *(u32*)&buffer[60]; // word 60 and word 61
637: SET_GLOBAL(drive_g->sectors, sectors);
638:
639: // Setup disk geometry translation.
640: setup_translation(drive_g);
641:
642: // Register with bcv system.
643: add_bcv_internal(drive_g);
644:
645: return drive_g;
646: }
647:
648: static u64 SpinupEnd;
649:
650: static int
651: powerup_await_non_bsy(u16 base)
652: {
653: u8 orstatus = 0;
654: u8 status;
655: for (;;) {
656: status = inb(base+ATA_CB_STAT);
657: if (!(status & ATA_CB_STAT_BSY))
658: break;
659: orstatus |= status;
660: if (orstatus == 0xff) {
661: dprintf(1, "powerup IDE floating\n");
662: return orstatus;
663: }
664: if (check_time(SpinupEnd)) {
665: dprintf(1, "powerup IDE time out\n");
666: return -1;
667: }
668: yield();
669: }
670: dprintf(6, "powerup iobase=%x st=%x\n", base, status);
671: return status;
672: }
673:
674: static void
675: ata_detect(void *data)
676: {
677: struct ata_channel_s *atachannel = data;
678: int startid = (atachannel - ATA_channels) * 2;
679: struct drive_s dummy;
680: memset(&dummy, 0, sizeof(dummy));
681: // Device detection
682: int ataid, last_reset_ataid=-1;
683: for (ataid=startid; ataid<startid+2; ataid++) {
684: u8 channel = ataid / 2;
685: u8 slave = ataid % 2;
686:
687: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
688: if (!iobase1)
689: break;
690:
691: // Wait for not-bsy.
692: int status = powerup_await_non_bsy(iobase1);
693: if (status < 0)
694: continue;
695: u8 newdh = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0;
696: outb(newdh, iobase1+ATA_CB_DH);
697: ndelay(400);
698: status = powerup_await_non_bsy(iobase1);
699: if (status < 0)
700: continue;
701:
702: // Check if ioport registers look valid.
703: outb(newdh, iobase1+ATA_CB_DH);
704: u8 dh = inb(iobase1+ATA_CB_DH);
705: outb(0x55, iobase1+ATA_CB_SC);
706: outb(0xaa, iobase1+ATA_CB_SN);
707: u8 sc = inb(iobase1+ATA_CB_SC);
708: u8 sn = inb(iobase1+ATA_CB_SN);
709: dprintf(6, "ata_detect ataid=%d sc=%x sn=%x dh=%x\n"
710: , ataid, sc, sn, dh);
711: if (sc != 0x55 || sn != 0xaa || dh != newdh)
712: continue;
713:
714: // Prepare new drive.
715: dummy.cntl_id = ataid;
716:
717: // reset the channel
718: if (slave && ataid == last_reset_ataid + 1) {
719: // The drive was just reset - no need to reset it again.
720: } else {
721: ata_reset(&dummy);
722: last_reset_ataid = ataid;
723: }
724:
725: // check for ATAPI
726: u16 buffer[256];
727: struct drive_s *drive_g = init_drive_atapi(&dummy, buffer);
728: if (!drive_g) {
729: // Didn't find an ATAPI drive - look for ATA drive.
730: u8 st = inb(iobase1+ATA_CB_STAT);
731: if (!st)
732: // Status not set - can't be a valid drive.
733: continue;
734:
735: // Wait for RDY.
736: int ret = await_rdy(iobase1);
737: if (ret < 0)
738: continue;
739:
740: // check for ATA.
741: drive_g = init_drive_ata(&dummy, buffer);
742: if (!drive_g)
743: // No ATA drive found
744: continue;
745: }
746:
747: u16 resetresult = buffer[93];
748: dprintf(6, "ata_detect resetresult=%04x\n", resetresult);
749: if (!slave && (resetresult & 0xdf61) == 0x4041)
750: // resetresult looks valid and device 0 is responding to
751: // device 1 requests - device 1 must not be present - skip
752: // detection.
753: ataid++;
754: }
755: }
756:
757: static void
758: init_controller(struct ata_channel_s *atachannel
759: , int bdf, int irq, u32 port1, u32 port2)
760: {
761: SET_GLOBAL(atachannel->irq, irq);
762: SET_GLOBAL(atachannel->pci_bdf, bdf);
763: SET_GLOBAL(atachannel->iobase1, port1);
764: SET_GLOBAL(atachannel->iobase2, port2);
765: dprintf(1, "ATA controller %d at %x/%x (irq %d dev %x)\n"
766: , atachannel - ATA_channels, port1, port2, irq, bdf);
767: run_thread(ata_detect, atachannel);
768: }
769:
770: #define IRQ_ATA1 14
771: #define IRQ_ATA2 15
772:
773: static void
774: ata_init()
775: {
776: // Scan PCI bus for ATA adapters
777: int count=0, pcicount=0;
778: int bdf, max;
779: foreachpci(bdf, max) {
780: pcicount++;
781: if (pci_config_readw(bdf, PCI_CLASS_DEVICE) != PCI_CLASS_STORAGE_IDE)
782: continue;
783: if (count >= ARRAY_SIZE(ATA_channels))
784: break;
785:
786: u8 pciirq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
787: u8 prog_if = pci_config_readb(bdf, PCI_CLASS_PROG);
788: u32 port1, port2, irq;
789: if (prog_if & 1) {
790: port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_0) & ~3;
791: port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_1) & ~3;
792: irq = pciirq;
793: } else {
794: port1 = PORT_ATA1_CMD_BASE;
795: port2 = PORT_ATA1_CTRL_BASE;
796: irq = IRQ_ATA1;
797: }
798: init_controller(&ATA_channels[count], bdf, irq, port1, port2);
799: count++;
800:
801: if (prog_if & 4) {
802: port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_2) & ~3;
803: port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_3) & ~3;
804: irq = pciirq;
805: } else {
806: port1 = PORT_ATA2_CMD_BASE;
807: port2 = PORT_ATA2_CTRL_BASE;
808: irq = IRQ_ATA2;
809: }
810: init_controller(&ATA_channels[count], bdf, irq, port1, port2);
811: count++;
812: }
813:
814: if (!CONFIG_COREBOOT && !pcicount && ARRAY_SIZE(ATA_channels) >= 2) {
815: // No PCI devices found - probably a QEMU "-M isapc" machine.
816: // Try using ISA ports for ATA controllers.
817: init_controller(&ATA_channels[0]
818: , -1, IRQ_ATA1, PORT_ATA1_CMD_BASE, PORT_ATA1_CTRL_BASE);
819: init_controller(&ATA_channels[1]
820: , -1, IRQ_ATA2, PORT_ATA2_CMD_BASE, PORT_ATA2_CTRL_BASE);
821: }
822: }
823:
824: void
825: ata_setup()
826: {
827: if (!CONFIG_ATA)
828: return;
829:
830: dprintf(3, "init hard drives\n");
831:
832: SpinupEnd = calc_future_tsc(IDE_TIMEOUT);
833: ata_init();
834:
835: SET_BDA(disk_control_byte, 0xc0);
836:
837: enable_hwirq(14, entry_76);
838: }
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