aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/usb/gadget/fsl_qe_udc.c
blob: d701bf4698d222f5b6a3ed50ff159b4de854f626 (plain) (tree)
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624



























                                                                             
                      























































































































































































































































































































































                                                                               


                                   






























































































































































































































































































































                                                                                
                                                                    































































































































































































































































































































































































































































                                                                                
                                              


































                                                                              
                                               


























































































































































































































































































































































































































































                                                                                
                          
                                    


























































                                                                                
                                                                      



                                                                    










































                                                                         
 














                                                         


                 














                                                                    















































                                                                      

















                                                                   



                                                    
    
                                                               


































































































































                                                                            

                                                                        
 
                           




                           





























                                                                            



                                                                 

                                                       






                                          
                                                   
 




                                                                   
























                                                                            

                                                                      












                                                                             
                                                         
































                                                                                
                        




























































                                                                            


                                                










































                                                                         
                                                                



                                                                





































                                                                         

































































































































                                                                              


                                                                   









































                                                                            

                                   



























                                                                        
                                                                              
                                            



                                                                              










































































                                                                               
                                                               






























                                                                
                                                            



                                                            
                                     
                                                  
                                                           











                                                                  
                                                              

                                                           
                                                                       



                              






                                                           

















                                                                              



                                       





                                                                               
                          



                                                      
                          

                                     

                                                                              

                 
     
                                                          
     

                                                     









                                                                          

                                         










                                                     
                              





































                                                                          
                                         





















                                                                            
                                                     
























































                                                                             
/*
 * driver/usb/gadget/fsl_qe_udc.c
 *
 * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved.
 *
 * 	Xie Xiaobo <X.Xie@freescale.com>
 * 	Li Yang <leoli@freescale.com>
 * 	Based on bareboard code from Shlomi Gridish.
 *
 * Description:
 * Freescle QE/CPM USB Pheripheral Controller Driver
 * The controller can be found on MPC8360, MPC8272, and etc.
 * MPC8360 Rev 1.1 may need QE mircocode update
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#undef USB_TRACE

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/moduleparam.h>
#include <linux/of_platform.h>
#include <linux/dma-mapping.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <asm/qe.h>
#include <asm/cpm.h>
#include <asm/dma.h>
#include <asm/reg.h>
#include "fsl_qe_udc.h"

#define DRIVER_DESC     "Freescale QE/CPM USB Device Controller driver"
#define DRIVER_AUTHOR   "Xie XiaoBo"
#define DRIVER_VERSION  "1.0"

#define DMA_ADDR_INVALID        (~(dma_addr_t)0)

static const char driver_name[] = "fsl_qe_udc";
static const char driver_desc[] = DRIVER_DESC;

/*ep name is important in gadget, it should obey the convention of ep_match()*/
static const char *const ep_name[] = {
	"ep0-control", /* everyone has ep0 */
	/* 3 configurable endpoints */
	"ep1",
	"ep2",
	"ep3",
};

static struct usb_endpoint_descriptor qe_ep0_desc = {
	.bLength =		USB_DT_ENDPOINT_SIZE,
	.bDescriptorType =	USB_DT_ENDPOINT,

	.bEndpointAddress =	0,
	.bmAttributes =		USB_ENDPOINT_XFER_CONTROL,
	.wMaxPacketSize =	USB_MAX_CTRL_PAYLOAD,
};

/* it is initialized in probe()  */
static struct qe_udc *udc_controller;

/********************************************************************
 *      Internal Used Function Start
********************************************************************/
/*-----------------------------------------------------------------
 * done() - retire a request; caller blocked irqs
 *--------------------------------------------------------------*/
static void done(struct qe_ep *ep, struct qe_req *req, int status)
{
	struct qe_udc *udc = ep->udc;
	unsigned char stopped = ep->stopped;

	/* the req->queue pointer is used by ep_queue() func, in which
	 * the request will be added into a udc_ep->queue 'd tail
	 * so here the req will be dropped from the ep->queue
	 */
	list_del_init(&req->queue);

	/* req.status should be set as -EINPROGRESS in ep_queue() */
	if (req->req.status == -EINPROGRESS)
		req->req.status = status;
	else
		status = req->req.status;

	if (req->mapped) {
		dma_unmap_single(udc->gadget.dev.parent,
			req->req.dma, req->req.length,
			ep_is_in(ep)
				? DMA_TO_DEVICE
				: DMA_FROM_DEVICE);
		req->req.dma = DMA_ADDR_INVALID;
		req->mapped = 0;
	} else
		dma_sync_single_for_cpu(udc->gadget.dev.parent,
			req->req.dma, req->req.length,
			ep_is_in(ep)
				? DMA_TO_DEVICE
				: DMA_FROM_DEVICE);

	if (status && (status != -ESHUTDOWN))
		dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
			ep->ep.name, &req->req, status,
			req->req.actual, req->req.length);

	/* don't modify queue heads during completion callback */
	ep->stopped = 1;
	spin_unlock(&udc->lock);

	/* this complete() should a func implemented by gadget layer,
	 * eg fsg->bulk_in_complete() */
	if (req->req.complete)
		req->req.complete(&ep->ep, &req->req);

	spin_lock(&udc->lock);

	ep->stopped = stopped;
}

/*-----------------------------------------------------------------
 * nuke(): delete all requests related to this ep
 *--------------------------------------------------------------*/
static void nuke(struct qe_ep *ep, int status)
{
	/* Whether this eq has request linked */
	while (!list_empty(&ep->queue)) {
		struct qe_req *req = NULL;
		req = list_entry(ep->queue.next, struct qe_req, queue);

		done(ep, req, status);
	}
}

/*---------------------------------------------------------------------------*
 * USB and Endpoint manipulate process, include parameter and register       *
 *---------------------------------------------------------------------------*/
/* @value: 1--set stall 0--clean stall */
static int qe_eprx_stall_change(struct qe_ep *ep, int value)
{
	u16 tem_usep;
	u8 epnum = ep->epnum;
	struct qe_udc *udc = ep->udc;

	tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
	tem_usep = tem_usep & ~USB_RHS_MASK;
	if (value == 1)
		tem_usep |= USB_RHS_STALL;
	else if (ep->dir == USB_DIR_IN)
		tem_usep |= USB_RHS_IGNORE_OUT;

	out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
	return 0;
}

static int qe_eptx_stall_change(struct qe_ep *ep, int value)
{
	u16 tem_usep;
	u8 epnum = ep->epnum;
	struct qe_udc *udc = ep->udc;

	tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
	tem_usep = tem_usep & ~USB_THS_MASK;
	if (value == 1)
		tem_usep |= USB_THS_STALL;
	else if (ep->dir == USB_DIR_OUT)
		tem_usep |= USB_THS_IGNORE_IN;

	out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);

	return 0;
}

static int qe_ep0_stall(struct qe_udc *udc)
{
	qe_eptx_stall_change(&udc->eps[0], 1);
	qe_eprx_stall_change(&udc->eps[0], 1);
	udc_controller->ep0_state = WAIT_FOR_SETUP;
	udc_controller->ep0_dir = 0;
	return 0;
}

static int qe_eprx_nack(struct qe_ep *ep)
{
	u8 epnum = ep->epnum;
	struct qe_udc *udc = ep->udc;

	if (ep->state == EP_STATE_IDLE) {
		/* Set the ep's nack */
		clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
				USB_RHS_MASK, USB_RHS_NACK);

		/* Mask Rx and Busy interrupts */
		clrbits16(&udc->usb_regs->usb_usbmr,
				(USB_E_RXB_MASK | USB_E_BSY_MASK));

		ep->state = EP_STATE_NACK;
	}
	return 0;
}

static int qe_eprx_normal(struct qe_ep *ep)
{
	struct qe_udc *udc = ep->udc;

	if (ep->state == EP_STATE_NACK) {
		clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
				USB_RTHS_MASK, USB_THS_IGNORE_IN);

		/* Unmask RX interrupts */
		out_be16(&udc->usb_regs->usb_usber,
				USB_E_BSY_MASK | USB_E_RXB_MASK);
		setbits16(&udc->usb_regs->usb_usbmr,
				(USB_E_RXB_MASK | USB_E_BSY_MASK));

		ep->state = EP_STATE_IDLE;
		ep->has_data = 0;
	}

	return 0;
}

static int qe_ep_cmd_stoptx(struct qe_ep *ep)
{
	if (ep->udc->soc_type == PORT_CPM)
		cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
				CPM_USB_STOP_TX_OPCODE);
	else
		qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
				ep->epnum, 0);

	return 0;
}

static int qe_ep_cmd_restarttx(struct qe_ep *ep)
{
	if (ep->udc->soc_type == PORT_CPM)
		cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
				CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
	else
		qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
				ep->epnum, 0);

	return 0;
}

static int qe_ep_flushtxfifo(struct qe_ep *ep)
{
	struct qe_udc *udc = ep->udc;
	int i;

	i = (int)ep->epnum;

	qe_ep_cmd_stoptx(ep);
	out_8(&udc->usb_regs->usb_uscom,
		USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
	out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
	out_be32(&udc->ep_param[i]->tstate, 0);
	out_be16(&udc->ep_param[i]->tbcnt, 0);

	ep->c_txbd = ep->txbase;
	ep->n_txbd = ep->txbase;
	qe_ep_cmd_restarttx(ep);
	return 0;
}

static int qe_ep_filltxfifo(struct qe_ep *ep)
{
	struct qe_udc *udc = ep->udc;

	out_8(&udc->usb_regs->usb_uscom,
			USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
	return 0;
}

static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
{
	struct qe_ep *ep;
	u32 bdring_len;
	struct qe_bd __iomem *bd;
	int i;

	ep = &udc->eps[pipe_num];

	if (ep->dir == USB_DIR_OUT)
		bdring_len = USB_BDRING_LEN_RX;
	else
		bdring_len = USB_BDRING_LEN;

	bd = ep->rxbase;
	for (i = 0; i < (bdring_len - 1); i++) {
		out_be32((u32 __iomem *)bd, R_E | R_I);
		bd++;
	}
	out_be32((u32 __iomem *)bd, R_E | R_I | R_W);

	bd = ep->txbase;
	for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
		out_be32(&bd->buf, 0);
		out_be32((u32 __iomem *)bd, 0);
		bd++;
	}
	out_be32((u32 __iomem *)bd, T_W);

	return 0;
}

static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
{
	struct qe_ep *ep;
	u16 tmpusep;

	ep = &udc->eps[pipe_num];
	tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
	tmpusep &= ~USB_RTHS_MASK;

	switch (ep->dir) {
	case USB_DIR_BOTH:
		qe_ep_flushtxfifo(ep);
		break;
	case USB_DIR_OUT:
		tmpusep |= USB_THS_IGNORE_IN;
		break;
	case USB_DIR_IN:
		qe_ep_flushtxfifo(ep);
		tmpusep |= USB_RHS_IGNORE_OUT;
		break;
	default:
		break;
	}
	out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);

	qe_epbds_reset(udc, pipe_num);

	return 0;
}

static int qe_ep_toggledata01(struct qe_ep *ep)
{
	ep->data01 ^= 0x1;
	return 0;
}

static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
{
	struct qe_ep *ep = &udc->eps[pipe_num];
	unsigned long tmp_addr = 0;
	struct usb_ep_para __iomem *epparam;
	int i;
	struct qe_bd __iomem *bd;
	int bdring_len;

	if (ep->dir == USB_DIR_OUT)
		bdring_len = USB_BDRING_LEN_RX;
	else
		bdring_len = USB_BDRING_LEN;

	epparam = udc->ep_param[pipe_num];
	/* alloc multi-ram for BD rings and set the ep parameters */
	tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
				USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
	if (IS_ERR_VALUE(tmp_addr))
		return -ENOMEM;

	out_be16(&epparam->rbase, (u16)tmp_addr);
	out_be16(&epparam->tbase, (u16)(tmp_addr +
				(sizeof(struct qe_bd) * bdring_len)));

	out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
	out_be16(&epparam->tbptr, in_be16(&epparam->tbase));

	ep->rxbase = cpm_muram_addr(tmp_addr);
	ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
				* bdring_len));
	ep->n_rxbd = ep->rxbase;
	ep->e_rxbd = ep->rxbase;
	ep->n_txbd = ep->txbase;
	ep->c_txbd = ep->txbase;
	ep->data01 = 0; /* data0 */

	/* Init TX and RX bds */
	bd = ep->rxbase;
	for (i = 0; i < bdring_len - 1; i++) {
		out_be32(&bd->buf, 0);
		out_be32((u32 __iomem *)bd, 0);
		bd++;
	}
	out_be32(&bd->buf, 0);
	out_be32((u32 __iomem *)bd, R_W);

	bd = ep->txbase;
	for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
		out_be32(&bd->buf, 0);
		out_be32((u32 __iomem *)bd, 0);
		bd++;
	}
	out_be32(&bd->buf, 0);
	out_be32((u32 __iomem *)bd, T_W);

	return 0;
}

static int qe_ep_rxbd_update(struct qe_ep *ep)
{
	unsigned int size;
	int i;
	unsigned int tmp;
	struct qe_bd __iomem *bd;
	unsigned int bdring_len;

	if (ep->rxbase == NULL)
		return -EINVAL;

	bd = ep->rxbase;

	ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
	if (ep->rxframe == NULL) {
		dev_err(ep->udc->dev, "malloc rxframe failed\n");
		return -ENOMEM;
	}

	qe_frame_init(ep->rxframe);

	if (ep->dir == USB_DIR_OUT)
		bdring_len = USB_BDRING_LEN_RX;
	else
		bdring_len = USB_BDRING_LEN;

	size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
	ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
	if (ep->rxbuffer == NULL) {
		dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
				size);
		kfree(ep->rxframe);
		return -ENOMEM;
	}

	ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
	if (ep->rxbuf_d == DMA_ADDR_INVALID) {
		ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
					ep->rxbuffer,
					size,
					DMA_FROM_DEVICE);
		ep->rxbufmap = 1;
	} else {
		dma_sync_single_for_device(udc_controller->gadget.dev.parent,
					ep->rxbuf_d, size,
					DMA_FROM_DEVICE);
		ep->rxbufmap = 0;
	}

	size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
	tmp = ep->rxbuf_d;
	tmp = (u32)(((tmp >> 2) << 2) + 4);

	for (i = 0; i < bdring_len - 1; i++) {
		out_be32(&bd->buf, tmp);
		out_be32((u32 __iomem *)bd, (R_E | R_I));
		tmp = tmp + size;
		bd++;
	}
	out_be32(&bd->buf, tmp);
	out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));

	return 0;
}

static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
{
	struct qe_ep *ep = &udc->eps[pipe_num];
	struct usb_ep_para __iomem *epparam;
	u16 usep, logepnum;
	u16 tmp;
	u8 rtfcr = 0;

	epparam = udc->ep_param[pipe_num];

	usep = 0;
	logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	usep |= (logepnum << USB_EPNUM_SHIFT);

	switch (ep->desc->bmAttributes & 0x03) {
	case USB_ENDPOINT_XFER_BULK:
		usep |= USB_TRANS_BULK;
		break;
	case USB_ENDPOINT_XFER_ISOC:
		usep |=  USB_TRANS_ISO;
		break;
	case USB_ENDPOINT_XFER_INT:
		usep |= USB_TRANS_INT;
		break;
	default:
		usep |= USB_TRANS_CTR;
		break;
	}

	switch (ep->dir) {
	case USB_DIR_OUT:
		usep |= USB_THS_IGNORE_IN;
		break;
	case USB_DIR_IN:
		usep |= USB_RHS_IGNORE_OUT;
		break;
	default:
		break;
	}
	out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);

	rtfcr = 0x30;
	out_8(&epparam->rbmr, rtfcr);
	out_8(&epparam->tbmr, rtfcr);

	tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
	/* MRBLR must be divisble by 4 */
	tmp = (u16)(((tmp >> 2) << 2) + 4);
	out_be16(&epparam->mrblr, tmp);

	return 0;
}

static int qe_ep_init(struct qe_udc *udc,
		      unsigned char pipe_num,
		      const struct usb_endpoint_descriptor *desc)
{
	struct qe_ep *ep = &udc->eps[pipe_num];
	unsigned long flags;
	int reval = 0;
	u16 max = 0;

	max = le16_to_cpu(desc->wMaxPacketSize);

	/* check the max package size validate for this endpoint */
	/* Refer to USB2.0 spec table 9-13,
	*/
	if (pipe_num != 0) {
		switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
		case USB_ENDPOINT_XFER_BULK:
			if (strstr(ep->ep.name, "-iso")
					|| strstr(ep->ep.name, "-int"))
				goto en_done;
			switch (udc->gadget.speed) {
			case USB_SPEED_HIGH:
			if ((max == 128) || (max == 256) || (max == 512))
				break;
			default:
				switch (max) {
				case 4:
				case 8:
				case 16:
				case 32:
				case 64:
					break;
				default:
				case USB_SPEED_LOW:
					goto en_done;
				}
			}
			break;
		case USB_ENDPOINT_XFER_INT:
			if (strstr(ep->ep.name, "-iso"))	/* bulk is ok */
				goto en_done;
			switch (udc->gadget.speed) {
			case USB_SPEED_HIGH:
				if (max <= 1024)
					break;
			case USB_SPEED_FULL:
				if (max <= 64)
					break;
			default:
				if (max <= 8)
					break;
				goto en_done;
			}
			break;
		case USB_ENDPOINT_XFER_ISOC:
			if (strstr(ep->ep.name, "-bulk")
				|| strstr(ep->ep.name, "-int"))
				goto en_done;
			switch (udc->gadget.speed) {
			case USB_SPEED_HIGH:
				if (max <= 1024)
					break;
			case USB_SPEED_FULL:
				if (max <= 1023)
					break;
			default:
				goto en_done;
			}
			break;
		case USB_ENDPOINT_XFER_CONTROL:
			if (strstr(ep->ep.name, "-iso")
				|| strstr(ep->ep.name, "-int"))
				goto en_done;
			switch (udc->gadget.speed) {
			case USB_SPEED_HIGH:
			case USB_SPEED_FULL:
				switch (max) {
				case 1:
				case 2:
				case 4:
				case 8:
				case 16:
				case 32:
				case 64:
					break;
				default:
					goto en_done;
				}
			case USB_SPEED_LOW:
				switch (max) {
				case 1:
				case 2:
				case 4:
				case 8:
					break;
				default:
					goto en_done;
				}
			default:
				goto en_done;
			}
			break;

		default:
			goto en_done;
		}
	} /* if ep0*/

	spin_lock_irqsave(&udc->lock, flags);

	/* initialize ep structure */
	ep->ep.maxpacket = max;
	ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
	ep->desc = desc;
	ep->stopped = 0;
	ep->init = 1;

	if (pipe_num == 0) {
		ep->dir = USB_DIR_BOTH;
		udc->ep0_dir = USB_DIR_OUT;
		udc->ep0_state = WAIT_FOR_SETUP;
	} else	{
		switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
		case USB_DIR_OUT:
			ep->dir = USB_DIR_OUT;
			break;
		case USB_DIR_IN:
			ep->dir = USB_DIR_IN;
		default:
			break;
		}
	}

	/* hardware special operation */
	qe_ep_bd_init(udc, pipe_num);
	if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
		reval = qe_ep_rxbd_update(ep);
		if (reval)
			goto en_done1;
	}

	if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
		ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
		if (ep->txframe == NULL) {
			dev_err(udc->dev, "malloc txframe failed\n");
			goto en_done2;
		}
		qe_frame_init(ep->txframe);
	}

	qe_ep_register_init(udc, pipe_num);

	/* Now HW will be NAKing transfers to that EP,
	 * until a buffer is queued to it. */
	spin_unlock_irqrestore(&udc->lock, flags);

	return 0;
en_done2:
	kfree(ep->rxbuffer);
	kfree(ep->rxframe);
en_done1:
	spin_unlock_irqrestore(&udc->lock, flags);
en_done:
	dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
	return -ENODEV;
}

static inline void qe_usb_enable(void)
{
	setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
}

static inline void qe_usb_disable(void)
{
	clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
}

/*----------------------------------------------------------------------------*
 *		USB and EP basic manipulate function end		      *
 *----------------------------------------------------------------------------*/


/******************************************************************************
		UDC transmit and receive process
 ******************************************************************************/
static void recycle_one_rxbd(struct qe_ep *ep)
{
	u32 bdstatus;

	bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
	bdstatus = R_I | R_E | (bdstatus & R_W);
	out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);

	if (bdstatus & R_W)
		ep->e_rxbd = ep->rxbase;
	else
		ep->e_rxbd++;
}

static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
{
	u32 bdstatus;
	struct qe_bd __iomem *bd, *nextbd;
	unsigned char stop = 0;

	nextbd = ep->n_rxbd;
	bd = ep->e_rxbd;
	bdstatus = in_be32((u32 __iomem *)bd);

	while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
		bdstatus = R_E | R_I | (bdstatus & R_W);
		out_be32((u32 __iomem *)bd, bdstatus);

		if (bdstatus & R_W)
			bd = ep->rxbase;
		else
			bd++;

		bdstatus = in_be32((u32 __iomem *)bd);
		if (stopatnext && (bd == nextbd))
			stop = 1;
	}

	ep->e_rxbd = bd;
}

static void ep_recycle_rxbds(struct qe_ep *ep)
{
	struct qe_bd __iomem *bd = ep->n_rxbd;
	u32 bdstatus;
	u8 epnum = ep->epnum;
	struct qe_udc *udc = ep->udc;

	bdstatus = in_be32((u32 __iomem *)bd);
	if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
		bd = ep->rxbase +
				((in_be16(&udc->ep_param[epnum]->rbptr) -
				  in_be16(&udc->ep_param[epnum]->rbase))
				 >> 3);
		bdstatus = in_be32((u32 __iomem *)bd);

		if (bdstatus & R_W)
			bd = ep->rxbase;
		else
			bd++;

		ep->e_rxbd = bd;
		recycle_rxbds(ep, 0);
		ep->e_rxbd = ep->n_rxbd;
	} else
		recycle_rxbds(ep, 1);

	if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
		out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);

	if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
		qe_eprx_normal(ep);

	ep->localnack = 0;
}

static void setup_received_handle(struct qe_udc *udc,
					struct usb_ctrlrequest *setup);
static int qe_ep_rxframe_handle(struct qe_ep *ep);
static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
/* when BD PID is setup, handle the packet */
static int ep0_setup_handle(struct qe_udc *udc)
{
	struct qe_ep *ep = &udc->eps[0];
	struct qe_frame *pframe;
	unsigned int fsize;
	u8 *cp;

	pframe = ep->rxframe;
	if ((frame_get_info(pframe) & PID_SETUP)
			&& (udc->ep0_state == WAIT_FOR_SETUP)) {
		fsize = frame_get_length(pframe);
		if (unlikely(fsize != 8))
			return -EINVAL;
		cp = (u8 *)&udc->local_setup_buff;
		memcpy(cp, pframe->data, fsize);
		ep->data01 = 1;

		/* handle the usb command base on the usb_ctrlrequest */
		setup_received_handle(udc, &udc->local_setup_buff);
		return 0;
	}
	return -EINVAL;
}

static int qe_ep0_rx(struct qe_udc *udc)
{
	struct qe_ep *ep = &udc->eps[0];
	struct qe_frame *pframe;
	struct qe_bd __iomem *bd;
	u32 bdstatus, length;
	u32 vaddr;

	pframe = ep->rxframe;

	if (ep->dir == USB_DIR_IN) {
		dev_err(udc->dev, "ep0 not a control endpoint\n");
		return -EINVAL;
	}

	bd = ep->n_rxbd;
	bdstatus = in_be32((u32 __iomem *)bd);
	length = bdstatus & BD_LENGTH_MASK;

	while (!(bdstatus & R_E) && length) {
		if ((bdstatus & R_F) && (bdstatus & R_L)
			&& !(bdstatus & R_ERROR)) {
			if (length == USB_CRC_SIZE) {
				udc->ep0_state = WAIT_FOR_SETUP;
				dev_vdbg(udc->dev,
					"receive a ZLP in status phase\n");
			} else {
				qe_frame_clean(pframe);
				vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
				frame_set_data(pframe, (u8 *)vaddr);
				frame_set_length(pframe,
						(length - USB_CRC_SIZE));
				frame_set_status(pframe, FRAME_OK);
				switch (bdstatus & R_PID) {
				case R_PID_SETUP:
					frame_set_info(pframe, PID_SETUP);
					break;
				case R_PID_DATA1:
					frame_set_info(pframe, PID_DATA1);
					break;
				default:
					frame_set_info(pframe, PID_DATA0);
					break;
				}

				if ((bdstatus & R_PID) == R_PID_SETUP)
					ep0_setup_handle(udc);
				else
					qe_ep_rxframe_handle(ep);
			}
		} else {
			dev_err(udc->dev, "The receive frame with error!\n");
		}

		/* note: don't clear the rxbd's buffer address */
		recycle_one_rxbd(ep);

		/* Get next BD */
		if (bdstatus & R_W)
			bd = ep->rxbase;
		else
			bd++;

		bdstatus = in_be32((u32 __iomem *)bd);
		length = bdstatus & BD_LENGTH_MASK;

	}

	ep->n_rxbd = bd;

	return 0;
}

static int qe_ep_rxframe_handle(struct qe_ep *ep)
{
	struct qe_frame *pframe;
	u8 framepid = 0;
	unsigned int fsize;
	u8 *cp;
	struct qe_req *req;

	pframe = ep->rxframe;

	if (frame_get_info(pframe) & PID_DATA1)
		framepid = 0x1;

	if (framepid != ep->data01) {
		dev_err(ep->udc->dev, "the data01 error!\n");
		return -EIO;
	}

	fsize = frame_get_length(pframe);
	if (list_empty(&ep->queue)) {
		dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
	} else {
		req = list_entry(ep->queue.next, struct qe_req, queue);

		cp = (u8 *)(req->req.buf) + req->req.actual;
		if (cp) {
			memcpy(cp, pframe->data, fsize);
			req->req.actual += fsize;
			if ((fsize < ep->ep.maxpacket) ||
					(req->req.actual >= req->req.length)) {
				if (ep->epnum == 0)
					ep0_req_complete(ep->udc, req);
				else
					done(ep, req, 0);
				if (list_empty(&ep->queue) && ep->epnum != 0)
					qe_eprx_nack(ep);
			}
		}
	}

	qe_ep_toggledata01(ep);

	return 0;
}

static void ep_rx_tasklet(unsigned long data)
{
	struct qe_udc *udc = (struct qe_udc *)data;
	struct qe_ep *ep;
	struct qe_frame *pframe;
	struct qe_bd __iomem *bd;
	unsigned long flags;
	u32 bdstatus, length;
	u32 vaddr, i;

	spin_lock_irqsave(&udc->lock, flags);

	for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
		ep = &udc->eps[i];

		if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
			dev_dbg(udc->dev,
				"This is a transmit ep or disable tasklet!\n");
			continue;
		}

		pframe = ep->rxframe;
		bd = ep->n_rxbd;
		bdstatus = in_be32((u32 __iomem *)bd);
		length = bdstatus & BD_LENGTH_MASK;

		while (!(bdstatus & R_E) && length) {
			if (list_empty(&ep->queue)) {
				qe_eprx_nack(ep);
				dev_dbg(udc->dev,
					"The rxep have noreq %d\n",
					ep->has_data);
				break;
			}

			if ((bdstatus & R_F) && (bdstatus & R_L)
				&& !(bdstatus & R_ERROR)) {
				qe_frame_clean(pframe);
				vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
				frame_set_data(pframe, (u8 *)vaddr);
				frame_set_length(pframe,
						(length - USB_CRC_SIZE));
				frame_set_status(pframe, FRAME_OK);
				switch (bdstatus & R_PID) {
				case R_PID_DATA1:
					frame_set_info(pframe, PID_DATA1);
					break;
				case R_PID_SETUP:
					frame_set_info(pframe, PID_SETUP);
					break;
				default:
					frame_set_info(pframe, PID_DATA0);
					break;
				}
				/* handle the rx frame */
				qe_ep_rxframe_handle(ep);
			} else {
				dev_err(udc->dev,
					"error in received frame\n");
			}
			/* note: don't clear the rxbd's buffer address */
			/*clear the length */
			out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
			ep->has_data--;
			if (!(ep->localnack))
				recycle_one_rxbd(ep);

			/* Get next BD */
			if (bdstatus & R_W)
				bd = ep->rxbase;
			else
				bd++;

			bdstatus = in_be32((u32 __iomem *)bd);
			length = bdstatus & BD_LENGTH_MASK;
		}

		ep->n_rxbd = bd;

		if (ep->localnack)
			ep_recycle_rxbds(ep);

		ep->enable_tasklet = 0;
	} /* for i=1 */

	spin_unlock_irqrestore(&udc->lock, flags);
}

static int qe_ep_rx(struct qe_ep *ep)
{
	struct qe_udc *udc;
	struct qe_frame *pframe;
	struct qe_bd __iomem *bd;
	u16 swoffs, ucoffs, emptybds;

	udc = ep->udc;
	pframe = ep->rxframe;

	if (ep->dir == USB_DIR_IN) {
		dev_err(udc->dev, "transmit ep in rx function\n");
		return -EINVAL;
	}

	bd = ep->n_rxbd;

	swoffs = (u16)(bd - ep->rxbase);
	ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
			in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
	if (swoffs < ucoffs)
		emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
	else
		emptybds = swoffs - ucoffs;

	if (emptybds < MIN_EMPTY_BDS) {
		qe_eprx_nack(ep);
		ep->localnack = 1;
		dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
	}
	ep->has_data = USB_BDRING_LEN_RX - emptybds;

	if (list_empty(&ep->queue)) {
		qe_eprx_nack(ep);
		dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
				ep->has_data);
		return 0;
	}

	tasklet_schedule(&udc->rx_tasklet);
	ep->enable_tasklet = 1;

	return 0;
}

/* send data from a frame, no matter what tx_req */
static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
{
	struct qe_udc *udc = ep->udc;
	struct qe_bd __iomem *bd;
	u16 saveusbmr;
	u32 bdstatus, pidmask;
	u32 paddr;

	if (ep->dir == USB_DIR_OUT) {
		dev_err(udc->dev, "receive ep passed to tx function\n");
		return -EINVAL;
	}

	/* Disable the Tx interrupt */
	saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
	out_be16(&udc->usb_regs->usb_usbmr,
			saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));

	bd = ep->n_txbd;
	bdstatus = in_be32((u32 __iomem *)bd);

	if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
		if (frame_get_length(frame) == 0) {
			frame_set_data(frame, udc->nullbuf);
			frame_set_length(frame, 2);
			frame->info |= (ZLP | NO_CRC);
			dev_vdbg(udc->dev, "the frame size = 0\n");
		}
		paddr = virt_to_phys((void *)frame->data);
		out_be32(&bd->buf, paddr);
		bdstatus = (bdstatus&T_W);
		if (!(frame_get_info(frame) & NO_CRC))
			bdstatus |= T_R | T_I | T_L | T_TC
					| frame_get_length(frame);
		else
			bdstatus |= T_R | T_I | T_L | frame_get_length(frame);

		/* if the packet is a ZLP in status phase */
		if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
			ep->data01 = 0x1;

		if (ep->data01) {
			pidmask = T_PID_DATA1;
			frame->info |= PID_DATA1;
		} else {
			pidmask = T_PID_DATA0;
			frame->info |= PID_DATA0;
		}
		bdstatus |= T_CNF;
		bdstatus |= pidmask;
		out_be32((u32 __iomem *)bd, bdstatus);
		qe_ep_filltxfifo(ep);

		/* enable the TX interrupt */
		out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);

		qe_ep_toggledata01(ep);
		if (bdstatus & T_W)
			ep->n_txbd = ep->txbase;
		else
			ep->n_txbd++;

		return 0;
	} else {
		out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
		dev_vdbg(udc->dev, "The tx bd is not ready!\n");
		return -EBUSY;
	}
}

/* when a bd was transmitted, the function can
 * handle the tx_req, not include ep0           */
static int txcomplete(struct qe_ep *ep, unsigned char restart)
{
	if (ep->tx_req != NULL) {
		if (!restart) {
			int asent = ep->last;
			ep->sent += asent;
			ep->last -= asent;
		} else {
			ep->last = 0;
		}

		/* a request already were transmitted completely */
		if ((ep->tx_req->req.length - ep->sent) <= 0) {
			ep->tx_req->req.actual = (unsigned int)ep->sent;
			done(ep, ep->tx_req, 0);
			ep->tx_req = NULL;
			ep->last = 0;
			ep->sent = 0;
		}
	}

	/* we should gain a new tx_req fot this endpoint */
	if (ep->tx_req == NULL) {
		if (!list_empty(&ep->queue)) {
			ep->tx_req = list_entry(ep->queue.next,	struct qe_req,
							queue);
			ep->last = 0;
			ep->sent = 0;
		}
	}

	return 0;
}

/* give a frame and a tx_req, send some data */
static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
{
	unsigned int size;
	u8 *buf;

	qe_frame_clean(frame);
	size = min_t(u32, (ep->tx_req->req.length - ep->sent),
				ep->ep.maxpacket);
	buf = (u8 *)ep->tx_req->req.buf + ep->sent;
	if (buf && size) {
		ep->last = size;
		frame_set_data(frame, buf);
		frame_set_length(frame, size);
		frame_set_status(frame, FRAME_OK);
		frame_set_info(frame, 0);
		return qe_ep_tx(ep, frame);
	}
	return -EIO;
}

/* give a frame struct,send a ZLP */
static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
{
	struct qe_udc *udc = ep->udc;

	if (frame == NULL)
		return -ENODEV;

	qe_frame_clean(frame);
	frame_set_data(frame, (u8 *)udc->nullbuf);
	frame_set_length(frame, 2);
	frame_set_status(frame, FRAME_OK);
	frame_set_info(frame, (ZLP | NO_CRC | infor));

	return qe_ep_tx(ep, frame);
}

static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
{
	struct qe_req *req = ep->tx_req;
	int reval;

	if (req == NULL)
		return -ENODEV;

	if ((req->req.length - ep->sent) > 0)
		reval = qe_usb_senddata(ep, frame);
	else
		reval = sendnulldata(ep, frame, 0);

	return reval;
}

/* if direction is DIR_IN, the status is Device->Host
 * if direction is DIR_OUT, the status transaction is Device<-Host
 * in status phase, udc create a request and gain status */
static int ep0_prime_status(struct qe_udc *udc, int direction)
{

	struct qe_ep *ep = &udc->eps[0];

	if (direction == USB_DIR_IN) {
		udc->ep0_state = DATA_STATE_NEED_ZLP;
		udc->ep0_dir = USB_DIR_IN;
		sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
	} else {
		udc->ep0_dir = USB_DIR_OUT;
		udc->ep0_state = WAIT_FOR_OUT_STATUS;
	}

	return 0;
}

/* a request complete in ep0, whether gadget request or udc request */
static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
{
	struct qe_ep *ep = &udc->eps[0];
	/* because usb and ep's status already been set in ch9setaddress() */

	switch (udc->ep0_state) {
	case DATA_STATE_XMIT:
		done(ep, req, 0);
		/* receive status phase */
		if (ep0_prime_status(udc, USB_DIR_OUT))
			qe_ep0_stall(udc);
		break;

	case DATA_STATE_NEED_ZLP:
		done(ep, req, 0);
		udc->ep0_state = WAIT_FOR_SETUP;
		break;

	case DATA_STATE_RECV:
		done(ep, req, 0);
		/* send status phase */
		if (ep0_prime_status(udc, USB_DIR_IN))
			qe_ep0_stall(udc);
		break;

	case WAIT_FOR_OUT_STATUS:
		done(ep, req, 0);
		udc->ep0_state = WAIT_FOR_SETUP;
		break;

	case WAIT_FOR_SETUP:
		dev_vdbg(udc->dev, "Unexpected interrupt\n");
		break;

	default:
		qe_ep0_stall(udc);
		break;
	}
}

static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
{
	struct qe_req *tx_req = NULL;
	struct qe_frame *frame = ep->txframe;

	if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
		if (!restart)
			ep->udc->ep0_state = WAIT_FOR_SETUP;
		else
			sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
		return 0;
	}

	tx_req = ep->tx_req;
	if (tx_req != NULL) {
		if (!restart) {
			int asent = ep->last;
			ep->sent += asent;
			ep->last -= asent;
		} else {
			ep->last = 0;
		}

		/* a request already were transmitted completely */
		if ((ep->tx_req->req.length - ep->sent) <= 0) {
			ep->tx_req->req.actual = (unsigned int)ep->sent;
			ep0_req_complete(ep->udc, ep->tx_req);
			ep->tx_req = NULL;
			ep->last = 0;
			ep->sent = 0;
		}
	} else {
		dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
	}

	return 0;
}

static int ep0_txframe_handle(struct qe_ep *ep)
{
	/* if have error, transmit again */
	if (frame_get_status(ep->txframe) & FRAME_ERROR) {
		qe_ep_flushtxfifo(ep);
		dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
		if (frame_get_info(ep->txframe) & PID_DATA0)
			ep->data01 = 0;
		else
			ep->data01 = 1;

		ep0_txcomplete(ep, 1);
	} else
		ep0_txcomplete(ep, 0);

	frame_create_tx(ep, ep->txframe);
	return 0;
}

static int qe_ep0_txconf(struct qe_ep *ep)
{
	struct qe_bd __iomem *bd;
	struct qe_frame *pframe;
	u32 bdstatus;

	bd = ep->c_txbd;
	bdstatus = in_be32((u32 __iomem *)bd);
	while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
		pframe = ep->txframe;

		/* clear and recycle the BD */
		out_be32((u32 __iomem *)bd, bdstatus & T_W);
		out_be32(&bd->buf, 0);
		if (bdstatus & T_W)
			ep->c_txbd = ep->txbase;
		else
			ep->c_txbd++;

		if (ep->c_txbd == ep->n_txbd) {
			if (bdstatus & DEVICE_T_ERROR) {
				frame_set_status(pframe, FRAME_ERROR);
				if (bdstatus & T_TO)
					pframe->status |= TX_ER_TIMEOUT;
				if (bdstatus & T_UN)
					pframe->status |= TX_ER_UNDERUN;
			}
			ep0_txframe_handle(ep);
		}

		bd = ep->c_txbd;
		bdstatus = in_be32((u32 __iomem *)bd);
	}

	return 0;
}

static int ep_txframe_handle(struct qe_ep *ep)
{
	if (frame_get_status(ep->txframe) & FRAME_ERROR) {
		qe_ep_flushtxfifo(ep);
		dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
		if (frame_get_info(ep->txframe) & PID_DATA0)
			ep->data01 = 0;
		else
			ep->data01 = 1;

		txcomplete(ep, 1);
	} else
		txcomplete(ep, 0);

	frame_create_tx(ep, ep->txframe); /* send the data */
	return 0;
}

/* confirm the already trainsmited bd */
static int qe_ep_txconf(struct qe_ep *ep)
{
	struct qe_bd __iomem *bd;
	struct qe_frame *pframe = NULL;
	u32 bdstatus;
	unsigned char breakonrxinterrupt = 0;

	bd = ep->c_txbd;
	bdstatus = in_be32((u32 __iomem *)bd);
	while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
		pframe = ep->txframe;
		if (bdstatus & DEVICE_T_ERROR) {
			frame_set_status(pframe, FRAME_ERROR);
			if (bdstatus & T_TO)
				pframe->status |= TX_ER_TIMEOUT;
			if (bdstatus & T_UN)
				pframe->status |= TX_ER_UNDERUN;
		}

		/* clear and recycle the BD */
		out_be32((u32 __iomem *)bd, bdstatus & T_W);
		out_be32(&bd->buf, 0);
		if (bdstatus & T_W)
			ep->c_txbd = ep->txbase;
		else
			ep->c_txbd++;

		/* handle the tx frame */
		ep_txframe_handle(ep);
		bd = ep->c_txbd;
		bdstatus = in_be32((u32 __iomem *)bd);
	}
	if (breakonrxinterrupt)
		return -EIO;
	else
		return 0;
}

/* Add a request in queue, and try to transmit a packet */
static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
{
	int reval = 0;

	if (ep->tx_req == NULL) {
		ep->sent = 0;
		ep->last = 0;
		txcomplete(ep, 0); /* can gain a new tx_req */
		reval = frame_create_tx(ep, ep->txframe);
	}
	return reval;
}

/* Maybe this is a good ideal */
static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
{
	struct qe_udc *udc = ep->udc;
	struct qe_frame *pframe = NULL;
	struct qe_bd __iomem *bd;
	u32 bdstatus, length;
	u32 vaddr, fsize;
	u8 *cp;
	u8 finish_req = 0;
	u8 framepid;

	if (list_empty(&ep->queue)) {
		dev_vdbg(udc->dev, "the req already finish!\n");
		return 0;
	}
	pframe = ep->rxframe;

	bd = ep->n_rxbd;
	bdstatus = in_be32((u32 __iomem *)bd);
	length = bdstatus & BD_LENGTH_MASK;

	while (!(bdstatus & R_E) && length) {
		if (finish_req)
			break;
		if ((bdstatus & R_F) && (bdstatus & R_L)
					&& !(bdstatus & R_ERROR)) {
			qe_frame_clean(pframe);
			vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
			frame_set_data(pframe, (u8 *)vaddr);
			frame_set_length(pframe, (length - USB_CRC_SIZE));
			frame_set_status(pframe, FRAME_OK);
			switch (bdstatus & R_PID) {
			case R_PID_DATA1:
				frame_set_info(pframe, PID_DATA1); break;
			default:
				frame_set_info(pframe, PID_DATA0); break;
			}
			/* handle the rx frame */

			if (frame_get_info(pframe) & PID_DATA1)
				framepid = 0x1;
			else
				framepid = 0;

			if (framepid != ep->data01) {
				dev_vdbg(udc->dev, "the data01 error!\n");
			} else {
				fsize = frame_get_length(pframe);

				cp = (u8 *)(req->req.buf) + req->req.actual;
				if (cp) {
					memcpy(cp, pframe->data, fsize);
					req->req.actual += fsize;
					if ((fsize < ep->ep.maxpacket)
						|| (req->req.actual >=
							req->req.length)) {
						finish_req = 1;
						done(ep, req, 0);
						if (list_empty(&ep->queue))
							qe_eprx_nack(ep);
					}
				}
				qe_ep_toggledata01(ep);
			}
		} else {
			dev_err(udc->dev, "The receive frame with error!\n");
		}

		/* note: don't clear the rxbd's buffer address *
		 * only Clear the length */
		out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
		ep->has_data--;

		/* Get next BD */
		if (bdstatus & R_W)
			bd = ep->rxbase;
		else
			bd++;

		bdstatus = in_be32((u32 __iomem *)bd);
		length = bdstatus & BD_LENGTH_MASK;
	}

	ep->n_rxbd = bd;
	ep_recycle_rxbds(ep);

	return 0;
}

/* only add the request in queue */
static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
{
	if (ep->state == EP_STATE_NACK) {
		if (ep->has_data <= 0) {
			/* Enable rx and unmask rx interrupt */
			qe_eprx_normal(ep);
		} else {
			/* Copy the exist BD data */
			ep_req_rx(ep, req);
		}
	}

	return 0;
}

/********************************************************************
	Internal Used Function End
********************************************************************/

/*-----------------------------------------------------------------------
	Endpoint Management Functions For Gadget
 -----------------------------------------------------------------------*/
static int qe_ep_enable(struct usb_ep *_ep,
			 const struct usb_endpoint_descriptor *desc)
{
	struct qe_udc *udc;
	struct qe_ep *ep;
	int retval = 0;
	unsigned char epnum;

	ep = container_of(_ep, struct qe_ep, ep);

	/* catch various bogus parameters */
	if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
			(desc->bDescriptorType != USB_DT_ENDPOINT))
		return -EINVAL;

	udc = ep->udc;
	if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
		return -ESHUTDOWN;

	epnum = (u8)desc->bEndpointAddress & 0xF;

	retval = qe_ep_init(udc, epnum, desc);
	if (retval != 0) {
		cpm_muram_free(cpm_muram_offset(ep->rxbase));
		dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
		return -EINVAL;
	}
	dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
	return 0;
}

static int qe_ep_disable(struct usb_ep *_ep)
{
	struct qe_udc *udc;
	struct qe_ep *ep;
	unsigned long flags;
	unsigned int size;

	ep = container_of(_ep, struct qe_ep, ep);
	udc = ep->udc;

	if (!_ep || !ep->desc) {
		dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
		return -EINVAL;
	}

	spin_lock_irqsave(&udc->lock, flags);
	/* Nuke all pending requests (does flush) */
	nuke(ep, -ESHUTDOWN);
	ep->desc = NULL;
	ep->stopped = 1;
	ep->tx_req = NULL;
	qe_ep_reset(udc, ep->epnum);
	spin_unlock_irqrestore(&udc->lock, flags);

	cpm_muram_free(cpm_muram_offset(ep->rxbase));

	if (ep->dir == USB_DIR_OUT)
		size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
				(USB_BDRING_LEN_RX + 1);
	else
		size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
				(USB_BDRING_LEN + 1);

	if (ep->dir != USB_DIR_IN) {
		kfree(ep->rxframe);
		if (ep->rxbufmap) {
			dma_unmap_single(udc_controller->gadget.dev.parent,
					ep->rxbuf_d, size,
					DMA_FROM_DEVICE);
			ep->rxbuf_d = DMA_ADDR_INVALID;
		} else {
			dma_sync_single_for_cpu(
					udc_controller->gadget.dev.parent,
					ep->rxbuf_d, size,
					DMA_FROM_DEVICE);
		}
		kfree(ep->rxbuffer);
	}

	if (ep->dir != USB_DIR_OUT)
		kfree(ep->txframe);

	dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
	return 0;
}

static struct usb_request *qe_alloc_request(struct usb_ep *_ep,	gfp_t gfp_flags)
{
	struct qe_req *req;

	req = kzalloc(sizeof(*req), gfp_flags);
	if (!req)
		return NULL;

	req->req.dma = DMA_ADDR_INVALID;

	INIT_LIST_HEAD(&req->queue);

	return &req->req;
}

static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
	struct qe_req *req;

	req = container_of(_req, struct qe_req, req);

	if (_req)
		kfree(req);
}

static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
{
	struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
	struct qe_req *req = container_of(_req, struct qe_req, req);
	struct qe_udc *udc;
	int reval;

	udc = ep->udc;
	/* catch various bogus parameters */
	if (!_req || !req->req.complete || !req->req.buf
			|| !list_empty(&req->queue)) {
		dev_dbg(udc->dev, "bad params\n");
		return -EINVAL;
	}
	if (!_ep || (!ep->desc && ep_index(ep))) {
		dev_dbg(udc->dev, "bad ep\n");
		return -EINVAL;
	}

	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
		return -ESHUTDOWN;

	req->ep = ep;

	/* map virtual address to hardware */
	if (req->req.dma == DMA_ADDR_INVALID) {
		req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
					req->req.buf,
					req->req.length,
					ep_is_in(ep)
					? DMA_TO_DEVICE :
					DMA_FROM_DEVICE);
		req->mapped = 1;
	} else {
		dma_sync_single_for_device(ep->udc->gadget.dev.parent,
					req->req.dma, req->req.length,
					ep_is_in(ep)
					? DMA_TO_DEVICE :
					DMA_FROM_DEVICE);
		req->mapped = 0;
	}

	req->req.status = -EINPROGRESS;
	req->req.actual = 0;

	list_add_tail(&req->queue, &ep->queue);
	dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
			ep->name, req->req.length);

	/* push the request to device */
	if (ep_is_in(ep))
		reval = ep_req_send(ep, req);

	/* EP0 */
	if (ep_index(ep) == 0 && req->req.length > 0) {
		if (ep_is_in(ep))
			udc->ep0_state = DATA_STATE_XMIT;
		else
			udc->ep0_state = DATA_STATE_RECV;
	}

	if (ep->dir == USB_DIR_OUT)
		reval = ep_req_receive(ep, req);

	return 0;
}

/* queues (submits) an I/O request to an endpoint */
static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
		       gfp_t gfp_flags)
{
	struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
	struct qe_udc *udc = ep->udc;
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&udc->lock, flags);
	ret = __qe_ep_queue(_ep, _req);
	spin_unlock_irqrestore(&udc->lock, flags);
	return ret;
}

/* dequeues (cancels, unlinks) an I/O request from an endpoint */
static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
	struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
	struct qe_req *req;
	unsigned long flags;

	if (!_ep || !_req)
		return -EINVAL;

	spin_lock_irqsave(&ep->udc->lock, flags);

	/* make sure it's actually queued on this endpoint */
	list_for_each_entry(req, &ep->queue, queue) {
		if (&req->req == _req)
			break;
	}

	if (&req->req != _req) {
		spin_unlock_irqrestore(&ep->udc->lock, flags);
		return -EINVAL;
	}

	done(ep, req, -ECONNRESET);

	spin_unlock_irqrestore(&ep->udc->lock, flags);
	return 0;
}

/*-----------------------------------------------------------------
 * modify the endpoint halt feature
 * @ep: the non-isochronous endpoint being stalled
 * @value: 1--set halt  0--clear halt
 * Returns zero, or a negative error code.
*----------------------------------------------------------------*/
static int qe_ep_set_halt(struct usb_ep *_ep, int value)
{
	struct qe_ep *ep;
	unsigned long flags;
	int status = -EOPNOTSUPP;
	struct qe_udc *udc;

	ep = container_of(_ep, struct qe_ep, ep);
	if (!_ep || !ep->desc) {
		status = -EINVAL;
		goto out;
	}

	udc = ep->udc;
	/* Attempt to halt IN ep will fail if any transfer requests
	 * are still queue */
	if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
		status = -EAGAIN;
		goto out;
	}

	status = 0;
	spin_lock_irqsave(&ep->udc->lock, flags);
	qe_eptx_stall_change(ep, value);
	qe_eprx_stall_change(ep, value);
	spin_unlock_irqrestore(&ep->udc->lock, flags);

	if (ep->epnum == 0) {
		udc->ep0_state = WAIT_FOR_SETUP;
		udc->ep0_dir = 0;
	}

	/* set data toggle to DATA0 on clear halt */
	if (value == 0)
		ep->data01 = 0;
out:
	dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
			value ?  "set" : "clear", status);

	return status;
}

static struct usb_ep_ops qe_ep_ops = {
	.enable = qe_ep_enable,
	.disable = qe_ep_disable,

	.alloc_request = qe_alloc_request,
	.free_request = qe_free_request,

	.queue = qe_ep_queue,
	.dequeue = qe_ep_dequeue,

	.set_halt = qe_ep_set_halt,
};

/*------------------------------------------------------------------------
	Gadget Driver Layer Operations
 ------------------------------------------------------------------------*/

/* Get the current frame number */
static int qe_get_frame(struct usb_gadget *gadget)
{
	u16 tmp;

	tmp = in_be16(&udc_controller->usb_param->frame_n);
	if (tmp & 0x8000)
		tmp = tmp & 0x07ff;
	else
		tmp = -EINVAL;

	return (int)tmp;
}

/* Tries to wake up the host connected to this gadget
 *
 * Return : 0-success
 * Negative-this feature not enabled by host or not supported by device hw
 */
static int qe_wakeup(struct usb_gadget *gadget)
{
	return -ENOTSUPP;
}

/* Notify controller that VBUS is powered, Called by whatever
   detects VBUS sessions */
static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
{
	return -ENOTSUPP;
}

/* constrain controller's VBUS power usage
 * This call is used by gadget drivers during SET_CONFIGURATION calls,
 * reporting how much power the device may consume.  For example, this
 * could affect how quickly batteries are recharged.
 *
 * Returns zero on success, else negative errno.
 */
static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
{
	return -ENOTSUPP;
}

/* Change Data+ pullup status
 * this func is used by usb_gadget_connect/disconnect
 */
static int qe_pullup(struct usb_gadget *gadget, int is_on)
{
	return -ENOTSUPP;
}

/* defined in usb_gadget.h */
static struct usb_gadget_ops qe_gadget_ops = {
	.get_frame = qe_get_frame,
	.wakeup = qe_wakeup,
/*	.set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
	.vbus_session = qe_vbus_session,
	.vbus_draw = qe_vbus_draw,
	.pullup = qe_pullup,
};

/*-------------------------------------------------------------------------
	USB ep0 Setup process in BUS Enumeration
 -------------------------------------------------------------------------*/
static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
{
	struct qe_ep *ep = &udc->eps[pipe];

	nuke(ep, -ECONNRESET);
	ep->tx_req = NULL;
	return 0;
}

static int reset_queues(struct qe_udc *udc)
{
	u8 pipe;

	for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
		udc_reset_ep_queue(udc, pipe);

	/* report disconnect; the driver is already quiesced */
	spin_unlock(&udc->lock);
	udc->driver->disconnect(&udc->gadget);
	spin_lock(&udc->lock);

	return 0;
}

static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
			u16 length)
{
	/* Save the new address to device struct */
	udc->device_address = (u8) value;
	/* Update usb state */
	udc->usb_state = USB_STATE_ADDRESS;

	/* Status phase , send a ZLP */
	if (ep0_prime_status(udc, USB_DIR_IN))
		qe_ep0_stall(udc);
}

static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
{
	struct qe_req *req = container_of(_req, struct qe_req, req);

	req->req.buf = NULL;
	kfree(req);
}

static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
			u16 index, u16 length)
{
	u16 usb_status = 0;
	struct qe_req *req;
	struct qe_ep *ep;
	int status = 0;

	ep = &udc->eps[0];
	if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
		/* Get device status */
		usb_status = 1 << USB_DEVICE_SELF_POWERED;
	} else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
		/* Get interface status */
		/* We don't have interface information in udc driver */
		usb_status = 0;
	} else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
		/* Get endpoint status */
		int pipe = index & USB_ENDPOINT_NUMBER_MASK;
		struct qe_ep *target_ep = &udc->eps[pipe];
		u16 usep;

		/* stall if endpoint doesn't exist */
		if (!target_ep->desc)
			goto stall;

		usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
		if (index & USB_DIR_IN) {
			if (target_ep->dir != USB_DIR_IN)
				goto stall;
			if ((usep & USB_THS_MASK) == USB_THS_STALL)
				usb_status = 1 << USB_ENDPOINT_HALT;
		} else {
			if (target_ep->dir != USB_DIR_OUT)
				goto stall;
			if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
				usb_status = 1 << USB_ENDPOINT_HALT;
		}
	}

	req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
					struct qe_req, req);
	req->req.length = 2;
	req->req.buf = udc->statusbuf;
	*(u16 *)req->req.buf = cpu_to_le16(usb_status);
	req->req.status = -EINPROGRESS;
	req->req.actual = 0;
	req->req.complete = ownercomplete;

	udc->ep0_dir = USB_DIR_IN;

	/* data phase */
	status = __qe_ep_queue(&ep->ep, &req->req);

	if (status == 0)
		return;
stall:
	dev_err(udc->dev, "Can't respond to getstatus request \n");
	qe_ep0_stall(udc);
}

/* only handle the setup request, suppose the device in normal status */
static void setup_received_handle(struct qe_udc *udc,
				struct usb_ctrlrequest *setup)
{
	/* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
	u16 wValue = le16_to_cpu(setup->wValue);
	u16 wIndex = le16_to_cpu(setup->wIndex);
	u16 wLength = le16_to_cpu(setup->wLength);

	/* clear the previous request in the ep0 */
	udc_reset_ep_queue(udc, 0);

	if (setup->bRequestType & USB_DIR_IN)
		udc->ep0_dir = USB_DIR_IN;
	else
		udc->ep0_dir = USB_DIR_OUT;

	switch (setup->bRequest) {
	case USB_REQ_GET_STATUS:
		/* Data+Status phase form udc */
		if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
					!= (USB_DIR_IN | USB_TYPE_STANDARD))
			break;
		ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
					wLength);
		return;

	case USB_REQ_SET_ADDRESS:
		/* Status phase from udc */
		if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
						USB_RECIP_DEVICE))
			break;
		ch9setaddress(udc, wValue, wIndex, wLength);
		return;

	case USB_REQ_CLEAR_FEATURE:
	case USB_REQ_SET_FEATURE:
		/* Requests with no data phase, status phase from udc */
		if ((setup->bRequestType & USB_TYPE_MASK)
					!= USB_TYPE_STANDARD)
			break;

		if ((setup->bRequestType & USB_RECIP_MASK)
				== USB_RECIP_ENDPOINT) {
			int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
			struct qe_ep *ep;

			if (wValue != 0 || wLength != 0
				|| pipe > USB_MAX_ENDPOINTS)
				break;
			ep = &udc->eps[pipe];

			spin_unlock(&udc->lock);
			qe_ep_set_halt(&ep->ep,
					(setup->bRequest == USB_REQ_SET_FEATURE)
						? 1 : 0);
			spin_lock(&udc->lock);
		}

		ep0_prime_status(udc, USB_DIR_IN);

		return;

	default:
		break;
	}

	if (wLength) {
		/* Data phase from gadget, status phase from udc */
		if (setup->bRequestType & USB_DIR_IN) {
			udc->ep0_state = DATA_STATE_XMIT;
			udc->ep0_dir = USB_DIR_IN;
		} else {
			udc->ep0_state = DATA_STATE_RECV;
			udc->ep0_dir = USB_DIR_OUT;
		}
		spin_unlock(&udc->lock);
		if (udc->driver->setup(&udc->gadget,
					&udc->local_setup_buff) < 0)
			qe_ep0_stall(udc);
		spin_lock(&udc->lock);
	} else {
		/* No data phase, IN status from gadget */
		udc->ep0_dir = USB_DIR_IN;
		spin_unlock(&udc->lock);
		if (udc->driver->setup(&udc->gadget,
					&udc->local_setup_buff) < 0)
			qe_ep0_stall(udc);
		spin_lock(&udc->lock);
		udc->ep0_state = DATA_STATE_NEED_ZLP;
	}
}

/*-------------------------------------------------------------------------
	USB Interrupt handlers
 -------------------------------------------------------------------------*/
static void suspend_irq(struct qe_udc *udc)
{
	udc->resume_state = udc->usb_state;
	udc->usb_state = USB_STATE_SUSPENDED;

	/* report suspend to the driver ,serial.c not support this*/
	if (udc->driver->suspend)
		udc->driver->suspend(&udc->gadget);
}

static void resume_irq(struct qe_udc *udc)
{
	udc->usb_state = udc->resume_state;
	udc->resume_state = 0;

	/* report resume to the driver , serial.c not support this*/
	if (udc->driver->resume)
		udc->driver->resume(&udc->gadget);
}

static void idle_irq(struct qe_udc *udc)
{
	u8 usbs;

	usbs = in_8(&udc->usb_regs->usb_usbs);
	if (usbs & USB_IDLE_STATUS_MASK) {
		if ((udc->usb_state) != USB_STATE_SUSPENDED)
			suspend_irq(udc);
	} else {
		if (udc->usb_state == USB_STATE_SUSPENDED)
			resume_irq(udc);
	}
}

static int reset_irq(struct qe_udc *udc)
{
	unsigned char i;

	if (udc->usb_state == USB_STATE_DEFAULT)
		return 0;

	qe_usb_disable();
	out_8(&udc->usb_regs->usb_usadr, 0);

	for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
		if (udc->eps[i].init)
			qe_ep_reset(udc, i);
	}

	reset_queues(udc);
	udc->usb_state = USB_STATE_DEFAULT;
	udc->ep0_state = WAIT_FOR_SETUP;
	udc->ep0_dir = USB_DIR_OUT;
	qe_usb_enable();
	return 0;
}

static int bsy_irq(struct qe_udc *udc)
{
	return 0;
}

static int txe_irq(struct qe_udc *udc)
{
	return 0;
}

/* ep0 tx interrupt also in here */
static int tx_irq(struct qe_udc *udc)
{
	struct qe_ep *ep;
	struct qe_bd __iomem *bd;
	int i, res = 0;

	if ((udc->usb_state == USB_STATE_ADDRESS)
		&& (in_8(&udc->usb_regs->usb_usadr) == 0))
		out_8(&udc->usb_regs->usb_usadr, udc->device_address);

	for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
		ep = &udc->eps[i];
		if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
			bd = ep->c_txbd;
			if (!(in_be32((u32 __iomem *)bd) & T_R)
						&& (in_be32(&bd->buf))) {
				/* confirm the transmitted bd */
				if (ep->epnum == 0)
					res = qe_ep0_txconf(ep);
				else
					res = qe_ep_txconf(ep);
			}
		}
	}
	return res;
}


/* setup packect's rx is handle in the function too */
static void rx_irq(struct qe_udc *udc)
{
	struct qe_ep *ep;
	struct qe_bd __iomem *bd;
	int i;

	for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
		ep = &udc->eps[i];
		if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
			bd = ep->n_rxbd;
			if (!(in_be32((u32 __iomem *)bd) & R_E)
						&& (in_be32(&bd->buf))) {
				if (ep->epnum == 0) {
					qe_ep0_rx(udc);
				} else {
					/*non-setup package receive*/
					qe_ep_rx(ep);
				}
			}
		}
	}
}

static irqreturn_t qe_udc_irq(int irq, void *_udc)
{
	struct qe_udc *udc = (struct qe_udc *)_udc;
	u16 irq_src;
	irqreturn_t status = IRQ_NONE;
	unsigned long flags;

	spin_lock_irqsave(&udc->lock, flags);

	irq_src = in_be16(&udc->usb_regs->usb_usber) &
		in_be16(&udc->usb_regs->usb_usbmr);
	/* Clear notification bits */
	out_be16(&udc->usb_regs->usb_usber, irq_src);
	/* USB Interrupt */
	if (irq_src & USB_E_IDLE_MASK) {
		idle_irq(udc);
		irq_src &= ~USB_E_IDLE_MASK;
		status = IRQ_HANDLED;
	}

	if (irq_src & USB_E_TXB_MASK) {
		tx_irq(udc);
		irq_src &= ~USB_E_TXB_MASK;
		status = IRQ_HANDLED;
	}

	if (irq_src & USB_E_RXB_MASK) {
		rx_irq(udc);
		irq_src &= ~USB_E_RXB_MASK;
		status = IRQ_HANDLED;
	}

	if (irq_src & USB_E_RESET_MASK) {
		reset_irq(udc);
		irq_src &= ~USB_E_RESET_MASK;
		status = IRQ_HANDLED;
	}

	if (irq_src & USB_E_BSY_MASK) {
		bsy_irq(udc);
		irq_src &= ~USB_E_BSY_MASK;
		status = IRQ_HANDLED;
	}

	if (irq_src & USB_E_TXE_MASK) {
		txe_irq(udc);
		irq_src &= ~USB_E_TXE_MASK;
		status = IRQ_HANDLED;
	}

	spin_unlock_irqrestore(&udc->lock, flags);

	return status;
}

/*-------------------------------------------------------------------------
	Gadget driver register and unregister.
 --------------------------------------------------------------------------*/
int usb_gadget_register_driver(struct usb_gadget_driver *driver)
{
	int retval;
	unsigned long flags = 0;

	/* standard operations */
	if (!udc_controller)
		return -ENODEV;

	if (!driver || (driver->speed != USB_SPEED_FULL
			&& driver->speed != USB_SPEED_HIGH)
			|| !driver->bind || !driver->disconnect
			|| !driver->setup)
		return -EINVAL;

	if (udc_controller->driver)
		return -EBUSY;

	/* lock is needed but whether should use this lock or another */
	spin_lock_irqsave(&udc_controller->lock, flags);

	driver->driver.bus = NULL;
	/* hook up the driver */
	udc_controller->driver = driver;
	udc_controller->gadget.dev.driver = &driver->driver;
	udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
	spin_unlock_irqrestore(&udc_controller->lock, flags);

	retval = driver->bind(&udc_controller->gadget);
	if (retval) {
		dev_err(udc_controller->dev, "bind to %s --> %d",
				driver->driver.name, retval);
		udc_controller->gadget.dev.driver = NULL;
		udc_controller->driver = NULL;
		return retval;
	}

	/* Enable IRQ reg and Set usbcmd reg EN bit */
	qe_usb_enable();

	out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
	out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
	udc_controller->usb_state = USB_STATE_ATTACHED;
	udc_controller->ep0_state = WAIT_FOR_SETUP;
	udc_controller->ep0_dir = USB_DIR_OUT;
	dev_info(udc_controller->dev, "%s bind to driver %s \n",
		udc_controller->gadget.name, driver->driver.name);
	return 0;
}
EXPORT_SYMBOL(usb_gadget_register_driver);

int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
{
	struct qe_ep *loop_ep;
	unsigned long flags;

	if (!udc_controller)
		return -ENODEV;

	if (!driver || driver != udc_controller->driver)
		return -EINVAL;

	/* stop usb controller, disable intr */
	qe_usb_disable();

	/* in fact, no needed */
	udc_controller->usb_state = USB_STATE_ATTACHED;
	udc_controller->ep0_state = WAIT_FOR_SETUP;
	udc_controller->ep0_dir = 0;

	/* stand operation */
	spin_lock_irqsave(&udc_controller->lock, flags);
	udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
	nuke(&udc_controller->eps[0], -ESHUTDOWN);
	list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
				ep.ep_list)
		nuke(loop_ep, -ESHUTDOWN);
	spin_unlock_irqrestore(&udc_controller->lock, flags);

	/* report disconnect; the controller is already quiesced */
	driver->disconnect(&udc_controller->gadget);

	/* unbind gadget and unhook driver. */
	driver->unbind(&udc_controller->gadget);
	udc_controller->gadget.dev.driver = NULL;
	udc_controller->driver = NULL;

	dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
			driver->driver.name);
	return 0;
}
EXPORT_SYMBOL(usb_gadget_unregister_driver);

/* udc structure's alloc and setup, include ep-param alloc */
static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
{
	struct qe_udc *udc;
	struct device_node *np = ofdev->node;
	unsigned int tmp_addr = 0;
	struct usb_device_para __iomem *usbpram;
	unsigned int i;
	u64 size;
	u32 offset;

	udc = kzalloc(sizeof(*udc), GFP_KERNEL);
	if (udc == NULL) {
		dev_err(&ofdev->dev, "malloc udc failed\n");
		goto cleanup;
	}

	udc->dev = &ofdev->dev;

	/* get default address of usb parameter in MURAM from device tree */
	offset = *of_get_address(np, 1, &size, NULL);
	udc->usb_param = cpm_muram_addr(offset);
	memset_io(udc->usb_param, 0, size);

	usbpram = udc->usb_param;
	out_be16(&usbpram->frame_n, 0);
	out_be32(&usbpram->rstate, 0);

	tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
					sizeof(struct usb_ep_para)),
					   USB_EP_PARA_ALIGNMENT);
	if (IS_ERR_VALUE(tmp_addr))
		goto cleanup;

	for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
		out_be16(&usbpram->epptr[i], (u16)tmp_addr);
		udc->ep_param[i] = cpm_muram_addr(tmp_addr);
		tmp_addr += 32;
	}

	memset_io(udc->ep_param[0], 0,
			USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));

	udc->resume_state = USB_STATE_NOTATTACHED;
	udc->usb_state = USB_STATE_POWERED;
	udc->ep0_dir = 0;

	spin_lock_init(&udc->lock);
	return udc;

cleanup:
	kfree(udc);
	return NULL;
}

/* USB Controller register init */
static int __devinit qe_udc_reg_init(struct qe_udc *udc)
{
	struct usb_ctlr __iomem *qe_usbregs;
	qe_usbregs = udc->usb_regs;

	/* Spec says that we must enable the USB controller to change mode. */
	out_8(&qe_usbregs->usb_usmod, 0x01);
	/* Mode changed, now disable it, since muram isn't initialized yet. */
	out_8(&qe_usbregs->usb_usmod, 0x00);

	/* Initialize the rest. */
	out_be16(&qe_usbregs->usb_usbmr, 0);
	out_8(&qe_usbregs->usb_uscom, 0);
	out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);

	return 0;
}

static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
{
	struct qe_ep *ep = &udc->eps[pipe_num];

	ep->udc = udc;
	strcpy(ep->name, ep_name[pipe_num]);
	ep->ep.name = ep_name[pipe_num];

	ep->ep.ops = &qe_ep_ops;
	ep->stopped = 1;
	ep->ep.maxpacket = (unsigned short) ~0;
	ep->desc = NULL;
	ep->dir = 0xff;
	ep->epnum = (u8)pipe_num;
	ep->sent = 0;
	ep->last = 0;
	ep->init = 0;
	ep->rxframe = NULL;
	ep->txframe = NULL;
	ep->tx_req = NULL;
	ep->state = EP_STATE_IDLE;
	ep->has_data = 0;

	/* the queue lists any req for this ep */
	INIT_LIST_HEAD(&ep->queue);

	/* gagdet.ep_list used for ep_autoconfig so no ep0*/
	if (pipe_num != 0)
		list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);

	ep->gadget = &udc->gadget;

	return 0;
}

/*-----------------------------------------------------------------------
 *	UDC device Driver operation functions				*
 *----------------------------------------------------------------------*/
static void qe_udc_release(struct device *dev)
{
	int i = 0;

	complete(udc_controller->done);
	cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
	for (i = 0; i < USB_MAX_ENDPOINTS; i++)
		udc_controller->ep_param[i] = NULL;

	kfree(udc_controller);
	udc_controller = NULL;
}

/* Driver probe functions */
static int __devinit qe_udc_probe(struct of_device *ofdev,
			const struct of_device_id *match)
{
	struct device_node *np = ofdev->node;
	struct qe_ep *ep;
	unsigned int ret = 0;
	unsigned int i;
	const void *prop;

	prop = of_get_property(np, "mode", NULL);
	if (!prop || strcmp(prop, "peripheral"))
		return -ENODEV;

	/* Initialize the udc structure including QH member and other member */
	udc_controller = qe_udc_config(ofdev);
	if (!udc_controller) {
		dev_err(&ofdev->dev, "failed to initialize\n");
		return -ENOMEM;
	}

	udc_controller->soc_type = (unsigned long)match->data;
	udc_controller->usb_regs = of_iomap(np, 0);
	if (!udc_controller->usb_regs) {
		ret = -ENOMEM;
		goto err1;
	}

	/* initialize usb hw reg except for regs for EP,
	 * leave usbintr reg untouched*/
	qe_udc_reg_init(udc_controller);

	/* here comes the stand operations for probe
	 * set the qe_udc->gadget.xxx */
	udc_controller->gadget.ops = &qe_gadget_ops;

	/* gadget.ep0 is a pointer */
	udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;

	INIT_LIST_HEAD(&udc_controller->gadget.ep_list);

	/* modify in register gadget process */
	udc_controller->gadget.speed = USB_SPEED_UNKNOWN;

	/* name: Identifies the controller hardware type. */
	udc_controller->gadget.name = driver_name;

	device_initialize(&udc_controller->gadget.dev);

	dev_set_name(&udc_controller->gadget.dev, "gadget");

	udc_controller->gadget.dev.release = qe_udc_release;
	udc_controller->gadget.dev.parent = &ofdev->dev;

	/* initialize qe_ep struct */
	for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
		/* because the ep type isn't decide here so
		 * qe_ep_init() should be called in ep_enable() */

		/* setup the qe_ep struct and link ep.ep.list
		 * into gadget.ep_list */
		qe_ep_config(udc_controller, (unsigned char)i);
	}

	/* ep0 initialization in here */
	ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
	if (ret)
		goto err2;

	/* create a buf for ZLP send, need to remain zeroed */
	udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
	if (udc_controller->nullbuf == NULL) {
		dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
		ret = -ENOMEM;
		goto err3;
	}

	/* buffer for data of get_status request */
	udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
	if (udc_controller->statusbuf == NULL) {
		ret = -ENOMEM;
		goto err4;
	}

	udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
	if (udc_controller->nullp == DMA_ADDR_INVALID) {
		udc_controller->nullp = dma_map_single(
					udc_controller->gadget.dev.parent,
					udc_controller->nullbuf,
					256,
					DMA_TO_DEVICE);
		udc_controller->nullmap = 1;
	} else {
		dma_sync_single_for_device(udc_controller->gadget.dev.parent,
					udc_controller->nullp, 256,
					DMA_TO_DEVICE);
	}

	tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
			(unsigned long)udc_controller);
	/* request irq and disable DR  */
	udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
	if (!udc_controller->usb_irq) {
		ret = -EINVAL;
		goto err_noirq;
	}

	ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
				driver_name, udc_controller);
	if (ret) {
		dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
			udc_controller->usb_irq, ret);
		goto err5;
	}

	ret = device_add(&udc_controller->gadget.dev);
	if (ret)
		goto err6;

	dev_info(udc_controller->dev,
			"%s USB controller initialized as device\n",
			(udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
	return 0;

err6:
	free_irq(udc_controller->usb_irq, udc_controller);
err5:
	irq_dispose_mapping(udc_controller->usb_irq);
err_noirq:
	if (udc_controller->nullmap) {
		dma_unmap_single(udc_controller->gadget.dev.parent,
			udc_controller->nullp, 256,
				DMA_TO_DEVICE);
			udc_controller->nullp = DMA_ADDR_INVALID;
	} else {
		dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
			udc_controller->nullp, 256,
				DMA_TO_DEVICE);
	}
	kfree(udc_controller->statusbuf);
err4:
	kfree(udc_controller->nullbuf);
err3:
	ep = &udc_controller->eps[0];
	cpm_muram_free(cpm_muram_offset(ep->rxbase));
	kfree(ep->rxframe);
	kfree(ep->rxbuffer);
	kfree(ep->txframe);
err2:
	iounmap(udc_controller->usb_regs);
err1:
	kfree(udc_controller);
	udc_controller = NULL;
	return ret;
}

#ifdef CONFIG_PM
static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
{
	return -ENOTSUPP;
}

static int qe_udc_resume(struct of_device *dev)
{
	return -ENOTSUPP;
}
#endif

static int __devexit qe_udc_remove(struct of_device *ofdev)
{
	struct qe_ep *ep;
	unsigned int size;

	DECLARE_COMPLETION(done);

	if (!udc_controller)
		return -ENODEV;

	udc_controller->done = &done;
	tasklet_disable(&udc_controller->rx_tasklet);

	if (udc_controller->nullmap) {
		dma_unmap_single(udc_controller->gadget.dev.parent,
			udc_controller->nullp, 256,
				DMA_TO_DEVICE);
			udc_controller->nullp = DMA_ADDR_INVALID;
	} else {
		dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
			udc_controller->nullp, 256,
				DMA_TO_DEVICE);
	}
	kfree(udc_controller->statusbuf);
	kfree(udc_controller->nullbuf);

	ep = &udc_controller->eps[0];
	cpm_muram_free(cpm_muram_offset(ep->rxbase));
	size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);

	kfree(ep->rxframe);
	if (ep->rxbufmap) {
		dma_unmap_single(udc_controller->gadget.dev.parent,
				ep->rxbuf_d, size,
				DMA_FROM_DEVICE);
		ep->rxbuf_d = DMA_ADDR_INVALID;
	} else {
		dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
				ep->rxbuf_d, size,
				DMA_FROM_DEVICE);
	}

	kfree(ep->rxbuffer);
	kfree(ep->txframe);

	free_irq(udc_controller->usb_irq, udc_controller);
	irq_dispose_mapping(udc_controller->usb_irq);

	tasklet_kill(&udc_controller->rx_tasklet);

	iounmap(udc_controller->usb_regs);

	device_unregister(&udc_controller->gadget.dev);
	/* wait for release() of gadget.dev to free udc */
	wait_for_completion(&done);

	return 0;
}

/*-------------------------------------------------------------------------*/
static struct of_device_id __devinitdata qe_udc_match[] = {
	{
		.compatible = "fsl,mpc8360-qe-usb",
		.data = (void *)PORT_QE,
	},
	{
		.compatible = "fsl,mpc8272-cpm-usb",
		.data = (void *)PORT_CPM,
	},
	{},
};

MODULE_DEVICE_TABLE(of, qe_udc_match);

static struct of_platform_driver udc_driver = {
	.name           = (char *)driver_name,
	.match_table    = qe_udc_match,
	.probe          = qe_udc_probe,
	.remove         = __devexit_p(qe_udc_remove),
#ifdef CONFIG_PM
	.suspend        = qe_udc_suspend,
	.resume         = qe_udc_resume,
#endif
};

static int __init qe_udc_init(void)
{
	printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
			DRIVER_VERSION);
	return of_register_platform_driver(&udc_driver);
}

static void __exit qe_udc_exit(void)
{
	of_unregister_platform_driver(&udc_driver);
}

module_init(qe_udc_init);
module_exit(qe_udc_exit);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");