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| 3 | * Special Initializers for certain USB Mass Storage devices
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| 4 | *
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| 5 | * Current development and maintenance by:
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| 6 | * (c) 1999, 2000 Matthew Dharm ([email protected])
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| 7 | *
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| 8 | * This driver is based on the 'USB Mass Storage Class' document. This
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| 9 | * describes in detail the protocol used to communicate with such
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| 10 | * devices. Clearly, the designers had SCSI and ATAPI commands in
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| 11 | * mind when they created this document. The commands are all very
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| 12 | * similar to commands in the SCSI-II and ATAPI specifications.
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| 13 | *
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| 14 | * It is important to note that in a number of cases this class
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| 15 | * exhibits class-specific exemptions from the USB specification.
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| 16 | * Notably the usage of NAK, STALL and ACK differs from the norm, in
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| 17 | * that they are used to communicate wait, failed and OK on commands.
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| 18 | *
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| 19 | * Also, for certain devices, the interrupt endpoint is used to convey
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| 20 | * status of a command.
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| 21 |
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| 22 |
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| 23 | #include <linux/errno.h>
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| 24 |
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| 25 | #include "usb.h"
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| 26 | #include "initializers.h"
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| 27 | #include "debug.h"
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| 28 | #include "transport.h"
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| 29 |
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| 30 | |
| 31 | * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
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| 32 | * mode
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| 33 |
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| 34 | int usb_stor_euscsi_init(struct us_data *us)
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| 35 | {
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| 36 | int result;
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| 37 |
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| 38 | usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
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| 39 | result = usb_stor_control_msg(us, us->send_ctrl_pipe,
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| 40 | 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
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| 41 | 0x01, 0x0, NULL, 0x0, 5 * HZ);
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| 42 | usb_stor_dbg(us, "-- result is %d\n", result);
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| 43 |
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| 44 | return 0;
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| 45 | }
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| 46 |
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| 47 | |
| 48 | * This function is required to activate all four slots on the UCR-61S2B
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| 49 | * flash reader
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| 50 |
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| 51 | int usb_stor_ucr61s2b_init(struct us_data *us)
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| 52 | {
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| 53 | struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
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| 54 | struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
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| 55 | int res;
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| 56 | unsigned int partial;
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| 57 | static const char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
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| 58 |
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| 59 | usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
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| 60 |
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| 61 | bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
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| 62 | bcb->Tag = 0;
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| 63 | bcb->DataTransferLength = cpu_to_le32(0);
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| 64 | bcb->Flags = bcb->Lun = 0;
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| 65 | bcb->Length = sizeof(init_string) - 1;
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| 66 | memset(bcb->CDB, 0, sizeof(bcb->CDB));
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| 67 | memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
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| 68 |
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| 69 | res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
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| 70 | US_BULK_CB_WRAP_LEN, &partial);
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| 71 | if (res)
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| 72 | return -EIO;
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| 73 |
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| 74 | usb_stor_dbg(us, "Getting status packet...\n");
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| 75 | res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
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| 76 | US_BULK_CS_WRAP_LEN, &partial);
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| 77 | if (res)
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| 78 | return -EIO;
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| 79 |
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| 80 | return 0;
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| 81 | }
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| 82 |
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| 83 |
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| 84 | int usb_stor_huawei_e220_init(struct us_data *us)
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| 85 | {
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| 86 | int result;
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| 87 |
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| 88 | result = usb_stor_control_msg(us, us->send_ctrl_pipe,
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| 89 | USB_REQ_SET_FEATURE,
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| 90 | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
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| 91 | 0x01, 0x0, NULL, 0x0, 1 * HZ);
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| 92 | usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
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| 93 | return 0;
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| 94 | }
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