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Staging: keucr driver: fix uninitialized variable & proper memset length
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / keucr / msscsi.c
blobcb92d25acee07094ebd0653d40e07584fac79860
1 #include <linux/sched.h>
2 #include <linux/errno.h>
3 #include <linux/slab.h>
4
5 #include <scsi/scsi.h>
6 #include <scsi/scsi_eh.h>
7 #include <scsi/scsi_device.h>
8
9 #include "usb.h"
10 #include "scsiglue.h"
11 #include "transport.h"
12
13 int MS_SCSI_Test_Unit_Ready (struct us_data *us, struct scsi_cmnd *srb);
14 int MS_SCSI_Inquiry (struct us_data *us, struct scsi_cmnd *srb);
15 int MS_SCSI_Mode_Sense (struct us_data *us, struct scsi_cmnd *srb);
16 int MS_SCSI_Start_Stop (struct us_data *us, struct scsi_cmnd *srb);
17 int MS_SCSI_Read_Capacity (struct us_data *us, struct scsi_cmnd *srb);
18 int MS_SCSI_Read (struct us_data *us, struct scsi_cmnd *srb);
19 int MS_SCSI_Write (struct us_data *us, struct scsi_cmnd *srb);
20
21 //----- MS_SCSIIrp() --------------------------------------------------
22 int MS_SCSIIrp(struct us_data *us, struct scsi_cmnd *srb)
23 {
24 int result;
25
26 us->SrbStatus = SS_SUCCESS;
27 switch (srb->cmnd[0])
28 {
29 case TEST_UNIT_READY : result = MS_SCSI_Test_Unit_Ready (us, srb); break; //0x00
30 case INQUIRY : result = MS_SCSI_Inquiry (us, srb); break; //0x12
31 case MODE_SENSE : result = MS_SCSI_Mode_Sense (us, srb); break; //0x1A
32 case READ_CAPACITY : result = MS_SCSI_Read_Capacity (us, srb); break; //0x25
33 case READ_10 : result = MS_SCSI_Read (us, srb); break; //0x28
34 case WRITE_10 : result = MS_SCSI_Write (us, srb); break; //0x2A
35
36 default:
37 us->SrbStatus = SS_ILLEGAL_REQUEST;
38 result = USB_STOR_TRANSPORT_FAILED;
39 break;
40 }
41 return result;
42 }
43
44 //----- MS_SCSI_Test_Unit_Ready() --------------------------------------------------
45 int MS_SCSI_Test_Unit_Ready(struct us_data *us, struct scsi_cmnd *srb)
46 {
47 //printk("MS_SCSI_Test_Unit_Ready\n");
48 if (us->MS_Status.Insert && us->MS_Status.Ready)
49 return USB_STOR_TRANSPORT_GOOD;
50 else
51 {
52 ENE_MSInit(us);
53 return USB_STOR_TRANSPORT_GOOD;
54 }
55
56 return USB_STOR_TRANSPORT_GOOD;
57 }
58
59 //----- MS_SCSI_Inquiry() --------------------------------------------------
60 int MS_SCSI_Inquiry(struct us_data *us, struct scsi_cmnd *srb)
61 {
62 //printk("MS_SCSI_Inquiry\n");
63 BYTE data_ptr[36] = {0x00, 0x80, 0x02, 0x00, 0x1F, 0x00, 0x00, 0x00, 0x55, 0x53, 0x42, 0x32, 0x2E, 0x30, 0x20, 0x20, 0x43, 0x61, 0x72, 0x64, 0x52, 0x65, 0x61, 0x64, 0x65, 0x72, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x30, 0x31, 0x30, 0x30};
64
65 usb_stor_set_xfer_buf(us, data_ptr, 36, srb, TO_XFER_BUF);
66 return USB_STOR_TRANSPORT_GOOD;
67 }
68
69
70 //----- MS_SCSI_Mode_Sense() --------------------------------------------------
71 int MS_SCSI_Mode_Sense(struct us_data *us, struct scsi_cmnd *srb)
72 {
73 BYTE mediaNoWP[12] = {0x0b,0x00,0x00,0x08,0x00,0x00,0x71,0xc0,0x00,0x00,0x02,0x00};
74 BYTE mediaWP[12] = {0x0b,0x00,0x80,0x08,0x00,0x00,0x71,0xc0,0x00,0x00,0x02,0x00};
75
76 if (us->MS_Status.WtP)
77 usb_stor_set_xfer_buf(us, mediaWP, 12, srb, TO_XFER_BUF);
78 else
79 usb_stor_set_xfer_buf(us, mediaNoWP, 12, srb, TO_XFER_BUF);
80
81
82 return USB_STOR_TRANSPORT_GOOD;
83 }
84
85 //----- MS_SCSI_Read_Capacity() --------------------------------------------------
86 int MS_SCSI_Read_Capacity(struct us_data *us, struct scsi_cmnd *srb)
87 {
88 unsigned int offset = 0;
89 struct scatterlist *sg = NULL;
90 DWORD bl_num;
91 WORD bl_len;
92 BYTE buf[8];
93
94 printk("MS_SCSI_Read_Capacity\n");
95
96 bl_len = 0x200;
97 if ( us->MS_Status.IsMSPro )
98 bl_num = us->MSP_TotalBlock - 1;
99 else
100 bl_num = us->MS_Lib.NumberOfLogBlock * us->MS_Lib.blockSize * 2 - 1;
101
102 us->bl_num = bl_num;
103 printk("bl_len = %x\n", bl_len);
104 printk("bl_num = %x\n", bl_num);
105
106 //srb->request_bufflen = 8;
107 buf[0] = (bl_num>>24) & 0xff;
108 buf[1] = (bl_num>>16) & 0xff;
109 buf[2] = (bl_num>> 8) & 0xff;
110 buf[3] = (bl_num>> 0) & 0xff;
111 buf[4] = (bl_len>>24) & 0xff;
112 buf[5] = (bl_len>>16) & 0xff;
113 buf[6] = (bl_len>> 8) & 0xff;
114 buf[7] = (bl_len>> 0) & 0xff;
115
116 usb_stor_access_xfer_buf(us, buf, 8, srb, &sg, &offset, TO_XFER_BUF);
117 //usb_stor_set_xfer_buf(us, buf, srb->request_bufflen, srb, TO_XFER_BUF);
118
119 return USB_STOR_TRANSPORT_GOOD;
120 }
121
122 //----- MS_SCSI_Read() --------------------------------------------------
123 int MS_SCSI_Read(struct us_data *us, struct scsi_cmnd *srb)
124 {
125 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
126 int result=0;
127 PBYTE Cdb = srb->cmnd;
128 DWORD bn = ((Cdb[2]<<24) & 0xff000000) | ((Cdb[3]<<16) & 0x00ff0000) |
129 ((Cdb[4]<< 8) & 0x0000ff00) | ((Cdb[5]<< 0) & 0x000000ff);
130 WORD blen = ((Cdb[7]<< 8) & 0xff00) | ((Cdb[8]<< 0) & 0x00ff);
131 DWORD blenByte = blen * 0x200;
132
133 //printk("SCSIOP_READ --- bn = %X, blen = %X, srb->use_sg = %X\n", bn, blen, srb->use_sg);
134
135 if (bn > us->bl_num)
136 return USB_STOR_TRANSPORT_ERROR;
137
138 if (us->MS_Status.IsMSPro)
139 {
140 result = ENE_LoadBinCode(us, MSP_RW_PATTERN);
141 if (result != USB_STOR_XFER_GOOD)
142 {
143 printk("Load MSP RW pattern Fail !!\n");
144 return USB_STOR_TRANSPORT_ERROR;
145 }
146
147 // set up the command wrapper
148 memset(bcb, 0, sizeof(struct bulk_cb_wrap));
149 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
150 bcb->DataTransferLength = blenByte;
151 bcb->Flags = 0x80;
152 bcb->CDB[0] = 0xF1;
153 bcb->CDB[1] = 0x02;
154 bcb->CDB[5] = (BYTE)(bn);
155 bcb->CDB[4] = (BYTE)(bn>>8);
156 bcb->CDB[3] = (BYTE)(bn>>16);
157 bcb->CDB[2] = (BYTE)(bn>>24);
158
159 result = ENE_SendScsiCmd(us, FDIR_READ, scsi_sglist(srb), 1);
160 }
161 else
162 {
163 void *buf;
164 int offset=0;
165 WORD phyblk, logblk;
166 BYTE PageNum;
167 WORD len;
168 DWORD blkno;
169
170 buf = kmalloc(blenByte, GFP_KERNEL);
171 if (buf == NULL)
172 return USB_STOR_TRANSPORT_ERROR;
173
174 result = ENE_LoadBinCode(us, MS_RW_PATTERN);
175 if (result != USB_STOR_XFER_GOOD)
176 {
177 printk("Load MS RW pattern Fail !!\n");
178 result = USB_STOR_TRANSPORT_ERROR;
179 goto exit;
180 }
181
182 logblk = (WORD)(bn / us->MS_Lib.PagesPerBlock);
183 PageNum = (BYTE)(bn % us->MS_Lib.PagesPerBlock);
184
185 while(1)
186 {
187 if (blen > (us->MS_Lib.PagesPerBlock-PageNum) )
188 len = us->MS_Lib.PagesPerBlock-PageNum;
189 else
190 len = blen;
191
192 phyblk = MS_LibConv2Physical(us, logblk);
193 blkno = phyblk * 0x20 + PageNum;
194
195 // set up the command wrapper
196 memset(bcb, 0, sizeof(struct bulk_cb_wrap));
197 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
198 bcb->DataTransferLength = 0x200 * len;
199 bcb->Flags = 0x80;
200 bcb->CDB[0] = 0xF1;
201 bcb->CDB[1] = 0x02;
202 bcb->CDB[5] = (BYTE)(blkno);
203 bcb->CDB[4] = (BYTE)(blkno>>8);
204 bcb->CDB[3] = (BYTE)(blkno>>16);
205 bcb->CDB[2] = (BYTE)(blkno>>24);
206
207 result = ENE_SendScsiCmd(us, FDIR_READ, buf+offset, 0);
208 if (result != USB_STOR_XFER_GOOD)
209 {
210 printk("MS_SCSI_Read --- result = %x\n", result);
211 result = USB_STOR_TRANSPORT_ERROR;
212 goto exit;
213 }
214
215 blen -= len;
216 if (blen<=0)
217 break;
218 logblk++;
219 PageNum = 0;
220 offset += MS_BYTES_PER_PAGE*len;
221 }
222 usb_stor_set_xfer_buf(us, buf, blenByte, srb, TO_XFER_BUF);
223 exit:
224 kfree(buf);
225 }
226 return result;
227 }
228
229 //----- MS_SCSI_Write() --------------------------------------------------
230 int MS_SCSI_Write(struct us_data *us, struct scsi_cmnd *srb)
231 {
232 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
233 int result=0;
234 PBYTE Cdb = srb->cmnd;
235 DWORD bn = ((Cdb[2]<<24) & 0xff000000) | ((Cdb[3]<<16) & 0x00ff0000) |
236 ((Cdb[4]<< 8) & 0x0000ff00) | ((Cdb[5]<< 0) & 0x000000ff);
237 WORD blen = ((Cdb[7]<< 8) & 0xff00) | ((Cdb[8]<< 0) & 0x00ff);
238 DWORD blenByte = blen * 0x200;
239
240 if (bn > us->bl_num)
241 return USB_STOR_TRANSPORT_ERROR;
242
243 if (us->MS_Status.IsMSPro)
244 {
245 result = ENE_LoadBinCode(us, MSP_RW_PATTERN);
246 if (result != USB_STOR_XFER_GOOD)
247 {
248 printk("Load MSP RW pattern Fail !!\n");
249 return USB_STOR_TRANSPORT_ERROR;
250 }
251
252 // set up the command wrapper
253 memset(bcb, 0, sizeof(struct bulk_cb_wrap));
254 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
255 bcb->DataTransferLength = blenByte;
256 bcb->Flags = 0x00;
257 bcb->CDB[0] = 0xF0;
258 bcb->CDB[1] = 0x04;
259 bcb->CDB[5] = (BYTE)(bn);
260 bcb->CDB[4] = (BYTE)(bn>>8);
261 bcb->CDB[3] = (BYTE)(bn>>16);
262 bcb->CDB[2] = (BYTE)(bn>>24);
263
264 result = ENE_SendScsiCmd(us, FDIR_WRITE, scsi_sglist(srb), 1);
265 }
266 else
267 {
268 void *buf;
269 int offset=0;
270 WORD PhyBlockAddr;
271 BYTE PageNum;
272 DWORD result;
273 WORD len, oldphy, newphy;
274
275 buf = kmalloc(blenByte, GFP_KERNEL);
276 if (buf == NULL)
277 return USB_STOR_TRANSPORT_ERROR;
278 usb_stor_set_xfer_buf(us, buf, blenByte, srb, FROM_XFER_BUF);
279
280 result = ENE_LoadBinCode(us, MS_RW_PATTERN);
281 if (result != USB_STOR_XFER_GOOD)
282 {
283 printk("Load MS RW pattern Fail !!\n");
284 result = USB_STOR_TRANSPORT_ERROR;
285 goto exit;
286 }
287
288 PhyBlockAddr = (WORD)(bn / us->MS_Lib.PagesPerBlock);
289 PageNum = (BYTE)(bn % us->MS_Lib.PagesPerBlock);
290
291 while(1)
292 {
293 if (blen > (us->MS_Lib.PagesPerBlock-PageNum) )
294 len = us->MS_Lib.PagesPerBlock-PageNum;
295 else
296 len = blen;
297
298 oldphy = MS_LibConv2Physical(us, PhyBlockAddr);
299 newphy = MS_LibSearchBlockFromLogical(us, PhyBlockAddr);
300
301 result = MS_ReaderCopyBlock(us, oldphy, newphy, PhyBlockAddr, PageNum, buf+offset, len);
302 if (result != USB_STOR_XFER_GOOD)
303 {
304 printk("MS_SCSI_Write --- result = %x\n", result);
305 result = USB_STOR_TRANSPORT_ERROR;
306 goto exit;
307 }
308
309 us->MS_Lib.Phy2LogMap[oldphy] = MS_LB_NOT_USED_ERASED;
310 MS_LibForceSetLogicalPair(us, PhyBlockAddr, newphy);
311
312 blen -= len;
313 if (blen<=0)
314 break;
315 PhyBlockAddr++;
316 PageNum = 0;
317 offset += MS_BYTES_PER_PAGE*len;
318 }
319 exit:
320 kfree(buf);
321 }
322 return result;
323 }
324
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