/* * Most of this source has been derived from the Linux USB * project: * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net) * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) * (c) 1999 Michael Gee (michael@linuxspecific.com) * (c) 2000 Yggdrasil Computing, Inc. * * * Adapted for U-Boot: * (C) Copyright 2001 Denis Peter, MPL AG Switzerland * * For BBB support (C) Copyright 2003 * Gary Jennejohn, DENX Software Engineering <garyj@denx.de> * * BBB support based on /sys/dev/usb/umass.c from * FreeBSD. * * SPDX-License-Identifier: GPL-2.0+ */ /* Note: * Currently only the CBI transport protocoll has been implemented, and it * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB * transport protocoll may work as well. */ /* * New Note: * Support for USB Mass Storage Devices (BBB) has been added. It has * only been tested with USB memory sticks. */ #include <common.h> #include <command.h> #include <asm/byteorder.h> #include <asm/processor.h> #include <part.h> #include <usb.h> #undef BBB_COMDAT_TRACE #undef BBB_XPORT_TRACE #include <scsi.h> /* direction table -- this indicates the direction of the data * transfer for each command code -- a 1 indicates input */ static const unsigned char us_direction[256/8] = { 0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77, 0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1) static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN))); /* * CBI style */ #define US_CBI_ADSC 0 /* * BULK only */ #define US_BBB_RESET 0xff #define US_BBB_GET_MAX_LUN 0xfe /* Command Block Wrapper */ typedef struct { __u32 dCBWSignature; # define CBWSIGNATURE 0x43425355 __u32 dCBWTag; __u32 dCBWDataTransferLength; __u8 bCBWFlags; # define CBWFLAGS_OUT 0x00 # define CBWFLAGS_IN 0x80 __u8 bCBWLUN; __u8 bCDBLength; # define CBWCDBLENGTH 16 __u8 CBWCDB[CBWCDBLENGTH]; } umass_bbb_cbw_t; #define UMASS_BBB_CBW_SIZE 31 static __u32 CBWTag; /* Command Status Wrapper */ typedef struct { __u32 dCSWSignature; # define CSWSIGNATURE 0x53425355 __u32 dCSWTag; __u32 dCSWDataResidue; __u8 bCSWStatus; # define CSWSTATUS_GOOD 0x0 # define CSWSTATUS_FAILED 0x1 # define CSWSTATUS_PHASE 0x2 } umass_bbb_csw_t; #define UMASS_BBB_CSW_SIZE 13 #define USB_MAX_STOR_DEV 5 static int usb_max_devs; /* number of highest available usb device */ static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV]; struct us_data; typedef int (*trans_cmnd)(ccb *cb, struct us_data *data); typedef int (*trans_reset)(struct us_data *data); struct us_data { struct usb_device *pusb_dev; /* this usb_device */ unsigned int flags; /* from filter initially */ # define USB_READY (1 << 0) unsigned char ifnum; /* interface number */ unsigned char ep_in; /* in endpoint */ unsigned char ep_out; /* out ....... */ unsigned char ep_int; /* interrupt . */ unsigned char subclass; /* as in overview */ unsigned char protocol; /* .............. */ unsigned char attention_done; /* force attn on first cmd */ unsigned short ip_data; /* interrupt data */ int action; /* what to do */ int ip_wanted; /* needed */ int *irq_handle; /* for USB int requests */ unsigned int irqpipe; /* pipe for release_irq */ unsigned char irqmaxp; /* max packed for irq Pipe */ unsigned char irqinterval; /* Intervall for IRQ Pipe */ ccb *srb; /* current srb */ trans_reset transport_reset; /* reset routine */ trans_cmnd transport; /* transport routine */ }; #ifdef CONFIG_USB_EHCI /* * The U-Boot EHCI driver can handle any transfer length as long as there is * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are * limited to 65535 blocks. */ #define USB_MAX_XFER_BLK 65535 #else #define USB_MAX_XFER_BLK 20 #endif static struct us_data usb_stor[USB_MAX_STOR_DEV]; #define USB_STOR_TRANSPORT_GOOD 0 #define USB_STOR_TRANSPORT_FAILED -1 #define USB_STOR_TRANSPORT_ERROR -2 int usb_stor_get_info(struct usb_device *dev, struct us_data *us, block_dev_desc_t *dev_desc); int usb_storage_probe(struct usb_device *dev, unsigned int ifnum, struct us_data *ss); unsigned long usb_stor_read(int device, lbaint_t blknr, lbaint_t blkcnt, void *buffer); unsigned long usb_stor_write(int device, lbaint_t blknr, lbaint_t blkcnt, const void *buffer); struct usb_device * usb_get_dev_index(int index); void uhci_show_temp_int_td(void); #ifdef CONFIG_PARTITIONS block_dev_desc_t *usb_stor_get_dev(int index) { return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL; } #endif static void usb_show_progress(void) { debug("."); } /******************************************************************************* * show info on storage devices; 'usb start/init' must be invoked earlier * as we only retrieve structures populated during devices initialization */ int usb_stor_info(void) { int i; if (usb_max_devs > 0) { for (i = 0; i < usb_max_devs; i++) { printf(" Device %d: ", i); dev_print(&usb_dev_desc[i]); } return 0; } printf("No storage devices, perhaps not 'usb start'ed..?\n"); return 1; } static unsigned int usb_get_max_lun(struct us_data *us) { int len; ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1); len = usb_control_msg(us->pusb_dev, usb_rcvctrlpipe(us->pusb_dev, 0), US_BBB_GET_MAX_LUN, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 0, us->ifnum, result, sizeof(char), USB_CNTL_TIMEOUT * 5); debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result); return (len > 0) ? *result : 0; } /******************************************************************************* * scan the usb and reports device info * to the user if mode = 1 * returns current device or -1 if no */ int usb_stor_scan(int mode) { unsigned char i; struct usb_device *dev; if (mode == 1) printf(" scanning usb for storage devices... "); usb_disable_asynch(1); /* asynch transfer not allowed */ for (i = 0; i < USB_MAX_STOR_DEV; i++) { memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t)); usb_dev_desc[i].if_type = IF_TYPE_USB; usb_dev_desc[i].dev = i; usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN; usb_dev_desc[i].target = 0xff; usb_dev_desc[i].type = DEV_TYPE_UNKNOWN; usb_dev_desc[i].block_read = usb_stor_read; usb_dev_desc[i].block_write = usb_stor_write; } usb_max_devs = 0; for (i = 0; i < USB_MAX_DEVICE; i++) { dev = usb_get_dev_index(i); /* get device */ debug("i=%d\n", i); if (dev == NULL) break; /* no more devices available */ if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) { /* OK, it's a storage device. Iterate over its LUNs * and populate `usb_dev_desc'. */ int lun, max_lun, start = usb_max_devs; max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]); for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV; lun++) { usb_dev_desc[usb_max_devs].lun = lun; if (usb_stor_get_info(dev, &usb_stor[start], &usb_dev_desc[usb_max_devs]) == 1) { usb_max_devs++; } } } /* if storage device */ if (usb_max_devs == USB_MAX_STOR_DEV) { printf("max USB Storage Device reached: %d stopping\n", usb_max_devs); break; } } /* for */ usb_disable_asynch(0); /* asynch transfer allowed */ printf("%d Storage Device(s) found\n", usb_max_devs); if (usb_max_devs > 0) return 0; return -1; } static int usb_stor_irq(struct usb_device *dev) { struct us_data *us; us = (struct us_data *)dev->privptr; if (us->ip_wanted) us->ip_wanted = 0; return 0; } #ifdef DEBUG static void usb_show_srb(ccb *pccb) { int i; printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen); for (i = 0; i < 12; i++) printf("%02X ", pccb->cmd[i]); printf("\n"); } static void display_int_status(unsigned long tmp) { printf("Status: %s %s %s %s %s %s %s\n", (tmp & USB_ST_ACTIVE) ? "Active" : "", (tmp & USB_ST_STALLED) ? "Stalled" : "", (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "", (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "", (tmp & USB_ST_NAK_REC) ? "NAKed" : "", (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "", (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : ""); } #endif /*********************************************************************** * Data transfer routines ***********************************************************************/ static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length) { int max_size; int this_xfer; int result; int partial; int maxtry; int stat; /* determine the maximum packet size for these transfers */ max_size = usb_maxpacket(us->pusb_dev, pipe) * 16; /* while we have data left to transfer */ while (length) { /* calculate how long this will be -- maximum or a remainder */ this_xfer = length > max_size ? max_size : length; length -= this_xfer; /* setup the retry counter */ maxtry = 10; /* set up the transfer loop */ do { /* transfer the data */ debug("Bulk xfer 0x%x(%d) try #%d\n", (unsigned int)buf, this_xfer, 11 - maxtry); result = usb_bulk_msg(us->pusb_dev, pipe, buf, this_xfer, &partial, USB_CNTL_TIMEOUT * 5); debug("bulk_msg returned %d xferred %d/%d\n", result, partial, this_xfer); if (us->pusb_dev->status != 0) { /* if we stall, we need to clear it before * we go on */ #ifdef DEBUG display_int_status(us->pusb_dev->status); #endif if (us->pusb_dev->status & USB_ST_STALLED) { debug("stalled ->clearing endpoint" \ "halt for pipe 0x%x\n", pipe); stat = us->pusb_dev->status; usb_clear_halt(us->pusb_dev, pipe); us->pusb_dev->status = stat; if (this_xfer == partial) { debug("bulk transferred" \ "with error %lX," \ " but data ok\n", us->pusb_dev->status); return 0; } else return result; } if (us->pusb_dev->status & USB_ST_NAK_REC) { debug("Device NAKed bulk_msg\n"); return result; } debug("bulk transferred with error"); if (this_xfer == partial) { debug(" %ld, but data ok\n", us->pusb_dev->status); return 0; } /* if our try counter reaches 0, bail out */ debug(" %ld, data %d\n", us->pusb_dev->status, partial); if (!maxtry--) return result; } /* update to show what data was transferred */ this_xfer -= partial; buf += partial; /* continue until this transfer is done */ } while (this_xfer); } /* if we get here, we're done and successful */ return 0; } static int usb_stor_BBB_reset(struct us_data *us) { int result; unsigned int pipe; /* * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class) * * For Reset Recovery the host shall issue in the following order: * a) a Bulk-Only Mass Storage Reset * b) a Clear Feature HALT to the Bulk-In endpoint * c) a Clear Feature HALT to the Bulk-Out endpoint * * This is done in 3 steps. * * If the reset doesn't succeed, the device should be port reset. * * This comment stolen from FreeBSD's /sys/dev/usb/umass.c. */ debug("BBB_reset\n"); result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0), US_BBB_RESET, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5); if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) { debug("RESET:stall\n"); return -1; } /* long wait for reset */ mdelay(150); debug("BBB_reset result %d: status %lX reset\n", result, us->pusb_dev->status); pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in); result = usb_clear_halt(us->pusb_dev, pipe); /* long wait for reset */ mdelay(150); debug("BBB_reset result %d: status %lX clearing IN endpoint\n", result, us->pusb_dev->status); /* long wait for reset */ pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out); result = usb_clear_halt(us->pusb_dev, pipe); mdelay(150); debug("BBB_reset result %d: status %lX clearing OUT endpoint\n", result, us->pusb_dev->status); debug("BBB_reset done\n"); return 0; } /* FIXME: this reset function doesn't really reset the port, and it * should. Actually it should probably do what it's doing here, and * reset the port physically */ static int usb_stor_CB_reset(struct us_data *us) { unsigned char cmd[12]; int result; debug("CB_reset\n"); memset(cmd, 0xff, sizeof(cmd)); cmd[0] = SCSI_SEND_DIAG; cmd[1] = 4; result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0), US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0, us->ifnum, cmd, sizeof(cmd), USB_CNTL_TIMEOUT * 5); /* long wait for reset */ mdelay(1500); debug("CB_reset result %d: status %lX clearing endpoint halt\n", result, us->pusb_dev->status); usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in)); usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out)); debug("CB_reset done\n"); return 0; } /* * Set up the command for a BBB device. Note that the actual SCSI * command is copied into cbw.CBWCDB. */ static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us) { int result; int actlen; int dir_in; unsigned int pipe; ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw, 1); dir_in = US_DIRECTION(srb->cmd[0]); #ifdef BBB_COMDAT_TRACE printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n", dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen, srb->pdata); if (srb->cmdlen) { for (result = 0; result < srb->cmdlen; result++) printf("cmd[%d] %#x ", result, srb->cmd[result]); printf("\n"); } #endif /* sanity checks */ if (!(srb->cmdlen <= CBWCDBLENGTH)) { debug("usb_stor_BBB_comdat:cmdlen too large\n"); return -1; } /* always OUT to the ep */ pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out); cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE); cbw->dCBWTag = cpu_to_le32(CBWTag++); cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen); cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT); cbw->bCBWLUN = srb->lun; cbw->bCDBLength = srb->cmdlen; /* copy the command data into the CBW command data buffer */ /* DST SRC LEN!!! */ memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen); result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE, &actlen, USB_CNTL_TIMEOUT * 5); if (result < 0) debug("usb_stor_BBB_comdat:usb_bulk_msg error\n"); return result; } /* FIXME: we also need a CBI_command which sets up the completion * interrupt, and waits for it */ static int usb_stor_CB_comdat(ccb *srb, struct us_data *us) { int result = 0; int dir_in, retry; unsigned int pipe; unsigned long status; retry = 5; dir_in = US_DIRECTION(srb->cmd[0]); if (dir_in) pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in); else pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out); while (retry--) { debug("CBI gets a command: Try %d\n", 5 - retry); #ifdef DEBUG usb_show_srb(srb); #endif /* let's send the command via the control pipe */ result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev , 0), US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0, us->ifnum, srb->cmd, srb->cmdlen, USB_CNTL_TIMEOUT * 5); debug("CB_transport: control msg returned %d, status %lX\n", result, us->pusb_dev->status); /* check the return code for the command */ if (result < 0) { if (us->pusb_dev->status & USB_ST_STALLED) { status = us->pusb_dev->status; debug(" stall during command found," \ " clear pipe\n"); usb_clear_halt(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0)); us->pusb_dev->status = status; } debug(" error during command %02X" \ " Stat = %lX\n", srb->cmd[0], us->pusb_dev->status); return result; } /* transfer the data payload for this command, if one exists*/ debug("CB_transport: control msg returned %d," \ " direction is %s to go 0x%lx\n", result, dir_in ? "IN" : "OUT", srb->datalen); if (srb->datalen) { result = us_one_transfer(us, pipe, (char *)srb->pdata, srb->datalen); debug("CBI attempted to transfer data," \ " result is %d status %lX, len %d\n", result, us->pusb_dev->status, us->pusb_dev->act_len); if (!(us->pusb_dev->status & USB_ST_NAK_REC)) break; } /* if (srb->datalen) */ else break; } /* return result */ return result; } static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us) { int timeout; us->ip_wanted = 1; submit_int_msg(us->pusb_dev, us->irqpipe, (void *) &us->ip_data, us->irqmaxp, us->irqinterval); timeout = 1000; while (timeout--) { if ((volatile int *) us->ip_wanted == NULL) break; mdelay(10); } if (us->ip_wanted) { printf(" Did not get interrupt on CBI\n"); us->ip_wanted = 0; return USB_STOR_TRANSPORT_ERROR; } debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n", us->ip_data, us->pusb_dev->irq_act_len, us->pusb_dev->irq_status); /* UFI gives us ASC and ASCQ, like a request sense */ if (us->subclass == US_SC_UFI) { if (srb->cmd[0] == SCSI_REQ_SENSE || srb->cmd[0] == SCSI_INQUIRY) return USB_STOR_TRANSPORT_GOOD; /* Good */ else if (us->ip_data) return USB_STOR_TRANSPORT_FAILED; else return USB_STOR_TRANSPORT_GOOD; } /* otherwise, we interpret the data normally */ switch (us->ip_data) { case 0x0001: return USB_STOR_TRANSPORT_GOOD; case 0x0002: return USB_STOR_TRANSPORT_FAILED; default: return USB_STOR_TRANSPORT_ERROR; } /* switch */ return USB_STOR_TRANSPORT_ERROR; } #define USB_TRANSPORT_UNKNOWN_RETRY 5 #define USB_TRANSPORT_NOT_READY_RETRY 10 /* clear a stall on an endpoint - special for BBB devices */ static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt) { int result; /* ENDPOINT_HALT = 0, so set value to 0 */ result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0), USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5); return result; } static int usb_stor_BBB_transport(ccb *srb, struct us_data *us) { int result, retry; int dir_in; int actlen, data_actlen; unsigned int pipe, pipein, pipeout; ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_csw_t, csw, 1); #ifdef BBB_XPORT_TRACE unsigned char *ptr; int index; #endif dir_in = US_DIRECTION(srb->cmd[0]); /* COMMAND phase */ debug("COMMAND phase\n"); result = usb_stor_BBB_comdat(srb, us); if (result < 0) { debug("failed to send CBW status %ld\n", us->pusb_dev->status); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } if (!(us->flags & USB_READY)) mdelay(5); pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in); pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out); /* DATA phase + error handling */ data_actlen = 0; /* no data, go immediately to the STATUS phase */ if (srb->datalen == 0) goto st; debug("DATA phase\n"); if (dir_in) pipe = pipein; else pipe = pipeout; result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen, &data_actlen, USB_CNTL_TIMEOUT * 5); /* special handling of STALL in DATA phase */ if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) { debug("DATA:stall\n"); /* clear the STALL on the endpoint */ result = usb_stor_BBB_clear_endpt_stall(us, dir_in ? us->ep_in : us->ep_out); if (result >= 0) /* continue on to STATUS phase */ goto st; } if (result < 0) { debug("usb_bulk_msg error status %ld\n", us->pusb_dev->status); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } #ifdef BBB_XPORT_TRACE for (index = 0; index < data_actlen; index++) printf("pdata[%d] %#x ", index, srb->pdata[index]); printf("\n"); #endif /* STATUS phase + error handling */ st: retry = 0; again: debug("STATUS phase\n"); result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE, &actlen, USB_CNTL_TIMEOUT*5); /* special handling of STALL in STATUS phase */ if ((result < 0) && (retry < 1) && (us->pusb_dev->status & USB_ST_STALLED)) { debug("STATUS:stall\n"); /* clear the STALL on the endpoint */ result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in); if (result >= 0 && (retry++ < 1)) /* do a retry */ goto again; } if (result < 0) { debug("usb_bulk_msg error status %ld\n", us->pusb_dev->status); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } #ifdef BBB_XPORT_TRACE ptr = (unsigned char *)csw; for (index = 0; index < UMASS_BBB_CSW_SIZE; index++) printf("ptr[%d] %#x ", index, ptr[index]); printf("\n"); #endif /* misuse pipe to get the residue */ pipe = le32_to_cpu(csw->dCSWDataResidue); if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0) pipe = srb->datalen - data_actlen; if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) { debug("!CSWSIGNATURE\n"); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) { debug("!Tag\n"); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } else if (csw->bCSWStatus > CSWSTATUS_PHASE) { debug(">PHASE\n"); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } else if (csw->bCSWStatus == CSWSTATUS_PHASE) { debug("=PHASE\n"); usb_stor_BBB_reset(us); return USB_STOR_TRANSPORT_FAILED; } else if (data_actlen > srb->datalen) { debug("transferred %dB instead of %ldB\n", data_actlen, srb->datalen); return USB_STOR_TRANSPORT_FAILED; } else if (csw->bCSWStatus == CSWSTATUS_FAILED) { debug("FAILED\n"); return USB_STOR_TRANSPORT_FAILED; } return result; } static int usb_stor_CB_transport(ccb *srb, struct us_data *us) { int result, status; ccb *psrb; ccb reqsrb; int retry, notready; psrb = &reqsrb; status = USB_STOR_TRANSPORT_GOOD; retry = 0; notready = 0; /* issue the command */ do_retry: result = usb_stor_CB_comdat(srb, us); debug("command / Data returned %d, status %lX\n", result, us->pusb_dev->status); /* if this is an CBI Protocol, get IRQ */ if (us->protocol == US_PR_CBI) { status = usb_stor_CBI_get_status(srb, us); /* if the status is error, report it */ if (status == USB_STOR_TRANSPORT_ERROR) { debug(" USB CBI Command Error\n"); return status; } srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8); srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff); if (!us->ip_data) { /* if the status is good, report it */ if (status == USB_STOR_TRANSPORT_GOOD) { debug(" USB CBI Command Good\n"); return status; } } } /* do we have to issue an auto request? */ /* HERE we have to check the result */ if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) { debug("ERROR %lX\n", us->pusb_dev->status); us->transport_reset(us); return USB_STOR_TRANSPORT_ERROR; } if ((us->protocol == US_PR_CBI) && ((srb->cmd[0] == SCSI_REQ_SENSE) || (srb->cmd[0] == SCSI_INQUIRY))) { /* do not issue an autorequest after request sense */ debug("No auto request and good\n"); return USB_STOR_TRANSPORT_GOOD; } /* issue an request_sense */ memset(&psrb->cmd[0], 0, 12); psrb->cmd[0] = SCSI_REQ_SENSE; psrb->cmd[1] = srb->lun << 5; psrb->cmd[4] = 18; psrb->datalen = 18; psrb->pdata = &srb->sense_buf[0]; psrb->cmdlen = 12; /* issue the command */ result = usb_stor_CB_comdat(psrb, us); debug("auto request returned %d\n", result); /* if this is an CBI Protocol, get IRQ */ if (us->protocol == US_PR_CBI) status = usb_stor_CBI_get_status(psrb, us); if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) { debug(" AUTO REQUEST ERROR %ld\n", us->pusb_dev->status); return USB_STOR_TRANSPORT_ERROR; } debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n", srb->sense_buf[0], srb->sense_buf[2], srb->sense_buf[12], srb->sense_buf[13]); /* Check the auto request result */ if ((srb->sense_buf[2] == 0) && (srb->sense_buf[12] == 0) && (srb->sense_buf[13] == 0)) { /* ok, no sense */ return USB_STOR_TRANSPORT_GOOD; } /* Check the auto request result */ switch (srb->sense_buf[2]) { case 0x01: /* Recovered Error */ return USB_STOR_TRANSPORT_GOOD; break; case 0x02: /* Not Ready */ if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) { printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X" " 0x%02X (NOT READY)\n", srb->cmd[0], srb->sense_buf[0], srb->sense_buf[2], srb->sense_buf[12], srb->sense_buf[13]); return USB_STOR_TRANSPORT_FAILED; } else { mdelay(100); goto do_retry; } break; default: if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) { printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X" " 0x%02X\n", srb->cmd[0], srb->sense_buf[0], srb->sense_buf[2], srb->sense_buf[12], srb->sense_buf[13]); return USB_STOR_TRANSPORT_FAILED; } else goto do_retry; break; } return USB_STOR_TRANSPORT_FAILED; } static int usb_inquiry(ccb *srb, struct us_data *ss) { int retry, i; retry = 5; do { memset(&srb->cmd[0], 0, 12); srb->cmd[0] = SCSI_INQUIRY; srb->cmd[1] = srb->lun << 5; srb->cmd[4] = 36; srb->datalen = 36; srb->cmdlen = 12; i = ss->transport(srb, ss); debug("inquiry returns %d\n", i); if (i == 0) break; } while (--retry); if (!retry) { printf("error in inquiry\n"); return -1; } return 0; } static int usb_request_sense(ccb *srb, struct us_data *ss) { char *ptr; ptr = (char *)srb->pdata; memset(&srb->cmd[0], 0, 12); srb->cmd[0] = SCSI_REQ_SENSE; srb->cmd[1] = srb->lun << 5; srb->cmd[4] = 18; srb->datalen = 18; srb->pdata = &srb->sense_buf[0]; srb->cmdlen = 12; ss->transport(srb, ss); debug("Request Sense returned %02X %02X %02X\n", srb->sense_buf[2], srb->sense_buf[12], srb->sense_buf[13]); srb->pdata = (uchar *)ptr; return 0; } static int usb_test_unit_ready(ccb *srb, struct us_data *ss) { int retries = 10; do { memset(&srb->cmd[0], 0, 12); srb->cmd[0] = SCSI_TST_U_RDY; srb->cmd[1] = srb->lun << 5; srb->datalen = 0; srb->cmdlen = 12; if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) { ss->flags |= USB_READY; return 0; } usb_request_sense(srb, ss); /* * Check the Key Code Qualifier, if it matches * "Not Ready - medium not present" * (the sense Key equals 0x2 and the ASC is 0x3a) * return immediately as the medium being absent won't change * unless there is a user action. */ if ((srb->sense_buf[2] == 0x02) && (srb->sense_buf[12] == 0x3a)) return -1; mdelay(100); } while (retries--); return -1; } static int usb_read_capacity(ccb *srb, struct us_data *ss) { int retry; /* XXX retries */ retry = 3; do { memset(&srb->cmd[0], 0, 12); srb->cmd[0] = SCSI_RD_CAPAC; srb->cmd[1] = srb->lun << 5; srb->datalen = 8; srb->cmdlen = 12; if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) return 0; } while (retry--); return -1; } static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start, unsigned short blocks) { memset(&srb->cmd[0], 0, 12); srb->cmd[0] = SCSI_READ10; srb->cmd[1] = srb->lun << 5; srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff; srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff; srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff; srb->cmd[5] = ((unsigned char) (start)) & 0xff; srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff; srb->cmd[8] = (unsigned char) blocks & 0xff; srb->cmdlen = 12; debug("read10: start %lx blocks %x\n", start, blocks); return ss->transport(srb, ss); } static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start, unsigned short blocks) { memset(&srb->cmd[0], 0, 12); srb->cmd[0] = SCSI_WRITE10; srb->cmd[1] = srb->lun << 5; srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff; srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff; srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff; srb->cmd[5] = ((unsigned char) (start)) & 0xff; srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff; srb->cmd[8] = (unsigned char) blocks & 0xff; srb->cmdlen = 12; debug("write10: start %lx blocks %x\n", start, blocks); return ss->transport(srb, ss); } #ifdef CONFIG_USB_BIN_FIXUP /* * Some USB storage devices queried for SCSI identification data respond with * binary strings, which if output to the console freeze the terminal. The * workaround is to modify the vendor and product strings read from such * device with proper values (as reported by 'usb info'). * * Vendor and product length limits are taken from the definition of * block_dev_desc_t in include/part.h. */ static void usb_bin_fixup(struct usb_device_descriptor descriptor, unsigned char vendor[], unsigned char product[]) { const unsigned char max_vendor_len = 40; const unsigned char max_product_len = 20; if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) { strncpy((char *)vendor, "SMSC", max_vendor_len); strncpy((char *)product, "Flash Media Cntrller", max_product_len); } } #endif /* CONFIG_USB_BIN_FIXUP */ unsigned long usb_stor_read(int device, lbaint_t blknr, lbaint_t blkcnt, void *buffer) { lbaint_t start, blks; uintptr_t buf_addr; unsigned short smallblks; struct usb_device *dev; struct us_data *ss; int retry, i; ccb *srb = &usb_ccb; if (blkcnt == 0) return 0; device &= 0xff; /* Setup device */ debug("\nusb_read: dev %d \n", device); dev = NULL; for (i = 0; i < USB_MAX_DEVICE; i++) { dev = usb_get_dev_index(i); if (dev == NULL) return 0; if (dev->devnum == usb_dev_desc[device].target) break; } ss = (struct us_data *)dev->privptr; usb_disable_asynch(1); /* asynch transfer not allowed */ srb->lun = usb_dev_desc[device].lun; buf_addr = (unsigned long)buffer; start = blknr; blks = blkcnt; debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n", device, start, blks, buf_addr); do { /* XXX need some comment here */ retry = 2; srb->pdata = (unsigned char *)buf_addr; if (blks > USB_MAX_XFER_BLK) smallblks = USB_MAX_XFER_BLK; else smallblks = (unsigned short) blks; retry_it: if (smallblks == USB_MAX_XFER_BLK) usb_show_progress(); srb->datalen = usb_dev_desc[device].blksz * smallblks; srb->pdata = (unsigned char *)buf_addr; if (usb_read_10(srb, ss, start, smallblks)) { debug("Read ERROR\n"); usb_request_sense(srb, ss); if (retry--) goto retry_it; blkcnt -= blks; break; } start += smallblks; blks -= smallblks; buf_addr += srb->datalen; } while (blks != 0); ss->flags &= ~USB_READY; debug("usb_read: end startblk " LBAF ", blccnt %x buffer %lx\n", start, smallblks, buf_addr); usb_disable_asynch(0); /* asynch transfer allowed */ if (blkcnt >= USB_MAX_XFER_BLK) debug("\n"); return blkcnt; } unsigned long usb_stor_write(int device, lbaint_t blknr, lbaint_t blkcnt, const void *buffer) { lbaint_t start, blks; uintptr_t buf_addr; unsigned short smallblks; struct usb_device *dev; struct us_data *ss; int retry, i; ccb *srb = &usb_ccb; if (blkcnt == 0) return 0; device &= 0xff; /* Setup device */ debug("\nusb_write: dev %d \n", device); dev = NULL; for (i = 0; i < USB_MAX_DEVICE; i++) { dev = usb_get_dev_index(i); if (dev == NULL) return 0; if (dev->devnum == usb_dev_desc[device].target) break; } ss = (struct us_data *)dev->privptr; usb_disable_asynch(1); /* asynch transfer not allowed */ srb->lun = usb_dev_desc[device].lun; buf_addr = (unsigned long)buffer; start = blknr; blks = blkcnt; debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n", device, start, blks, buf_addr); do { /* If write fails retry for max retry count else * return with number of blocks written successfully. */ retry = 2; srb->pdata = (unsigned char *)buf_addr; if (blks > USB_MAX_XFER_BLK) smallblks = USB_MAX_XFER_BLK; else smallblks = (unsigned short) blks; retry_it: if (smallblks == USB_MAX_XFER_BLK) usb_show_progress(); srb->datalen = usb_dev_desc[device].blksz * smallblks; srb->pdata = (unsigned char *)buf_addr; if (usb_write_10(srb, ss, start, smallblks)) { debug("Write ERROR\n"); usb_request_sense(srb, ss); if (retry--) goto retry_it; blkcnt -= blks; break; } start += smallblks; blks -= smallblks; buf_addr += srb->datalen; } while (blks != 0); ss->flags &= ~USB_READY; debug("usb_write: end startblk " LBAF ", blccnt %x buffer %lx\n", start, smallblks, buf_addr); usb_disable_asynch(0); /* asynch transfer allowed */ if (blkcnt >= USB_MAX_XFER_BLK) debug("\n"); return blkcnt; } /* Probe to see if a new device is actually a Storage device */ int usb_storage_probe(struct usb_device *dev, unsigned int ifnum, struct us_data *ss) { struct usb_interface *iface; int i; struct usb_endpoint_descriptor *ep_desc; unsigned int flags = 0; int protocol = 0; int subclass = 0; /* let's examine the device now */ iface = &dev->config.if_desc[ifnum]; #if 0 /* this is the place to patch some storage devices */ debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor, dev->descriptor.idProduct); if ((dev->descriptor.idVendor) == 0x066b && (dev->descriptor.idProduct) == 0x0103) { debug("patched for E-USB\n"); protocol = US_PR_CB; subclass = US_SC_UFI; /* an assumption */ } #endif if (dev->descriptor.bDeviceClass != 0 || iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE || iface->desc.bInterfaceSubClass < US_SC_MIN || iface->desc.bInterfaceSubClass > US_SC_MAX) { /* if it's not a mass storage, we go no further */ return 0; } memset(ss, 0, sizeof(struct us_data)); /* At this point, we know we've got a live one */ debug("\n\nUSB Mass Storage device detected\n"); /* Initialize the us_data structure with some useful info */ ss->flags = flags; ss->ifnum = ifnum; ss->pusb_dev = dev; ss->attention_done = 0; /* If the device has subclass and protocol, then use that. Otherwise, * take data from the specific interface. */ if (subclass) { ss->subclass = subclass; ss->protocol = protocol; } else { ss->subclass = iface->desc.bInterfaceSubClass; ss->protocol = iface->desc.bInterfaceProtocol; } /* set the handler pointers based on the protocol */ debug("Transport: "); switch (ss->protocol) { case US_PR_CB: debug("Control/Bulk\n"); ss->transport = usb_stor_CB_transport; ss->transport_reset = usb_stor_CB_reset; break; case US_PR_CBI: debug("Control/Bulk/Interrupt\n"); ss->transport = usb_stor_CB_transport; ss->transport_reset = usb_stor_CB_reset; break; case US_PR_BULK: debug("Bulk/Bulk/Bulk\n"); ss->transport = usb_stor_BBB_transport; ss->transport_reset = usb_stor_BBB_reset; break; default: printf("USB Storage Transport unknown / not yet implemented\n"); return 0; break; } /* * We are expecting a minimum of 2 endpoints - in and out (bulk). * An optional interrupt is OK (necessary for CBI protocol). * We will ignore any others. */ for (i = 0; i < iface->desc.bNumEndpoints; i++) { ep_desc = &iface->ep_desc[i]; /* is it an BULK endpoint? */ if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) { if (ep_desc->bEndpointAddress & USB_DIR_IN) ss->ep_in = ep_desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; else ss->ep_out = ep_desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; } /* is it an interrupt endpoint? */ if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) { ss->ep_int = ep_desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; ss->irqinterval = ep_desc->bInterval; } } debug("Endpoints In %d Out %d Int %d\n", ss->ep_in, ss->ep_out, ss->ep_int); /* Do some basic sanity checks, and bail if we find a problem */ if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) || !ss->ep_in || !ss->ep_out || (ss->protocol == US_PR_CBI && ss->ep_int == 0)) { debug("Problems with device\n"); return 0; } /* set class specific stuff */ /* We only handle certain protocols. Currently, these are * the only ones. * The SFF8070 accepts the requests used in u-boot */ if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI && ss->subclass != US_SC_8070) { printf("Sorry, protocol %d not yet supported.\n", ss->subclass); return 0; } if (ss->ep_int) { /* we had found an interrupt endpoint, prepare irq pipe * set up the IRQ pipe and handler */ ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255; ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int); ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe); dev->irq_handle = usb_stor_irq; } dev->privptr = (void *)ss; return 1; } int usb_stor_get_info(struct usb_device *dev, struct us_data *ss, block_dev_desc_t *dev_desc) { unsigned char perq, modi; ALLOC_CACHE_ALIGN_BUFFER(unsigned long, cap, 2); ALLOC_CACHE_ALIGN_BUFFER(unsigned char, usb_stor_buf, 36); unsigned long *capacity, *blksz; ccb *pccb = &usb_ccb; pccb->pdata = usb_stor_buf; dev_desc->target = dev->devnum; pccb->lun = dev_desc->lun; debug(" address %d\n", dev_desc->target); if (usb_inquiry(pccb, ss)) return -1; perq = usb_stor_buf[0]; modi = usb_stor_buf[1]; if ((perq & 0x1f) == 0x1f) { /* skip unknown devices */ return 0; } if ((modi&0x80) == 0x80) { /* drive is removable */ dev_desc->removable = 1; } memcpy(&dev_desc->vendor[0], (const void *) &usb_stor_buf[8], 8); memcpy(&dev_desc->product[0], (const void *) &usb_stor_buf[16], 16); memcpy(&dev_desc->revision[0], (const void *) &usb_stor_buf[32], 4); dev_desc->vendor[8] = 0; dev_desc->product[16] = 0; dev_desc->revision[4] = 0; #ifdef CONFIG_USB_BIN_FIXUP usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor, (uchar *)dev_desc->product); #endif /* CONFIG_USB_BIN_FIXUP */ debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2], usb_stor_buf[3]); if (usb_test_unit_ready(pccb, ss)) { printf("Device NOT ready\n" " Request Sense returned %02X %02X %02X\n", pccb->sense_buf[2], pccb->sense_buf[12], pccb->sense_buf[13]); if (dev_desc->removable == 1) { dev_desc->type = perq; return 1; } return 0; } pccb->pdata = (unsigned char *)&cap[0]; memset(pccb->pdata, 0, 8); if (usb_read_capacity(pccb, ss) != 0) { printf("READ_CAP ERROR\n"); cap[0] = 2880; cap[1] = 0x200; } ss->flags &= ~USB_READY; debug("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0], cap[1]); #if 0 if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */ cap[0] >>= 16; #endif cap[0] = cpu_to_be32(cap[0]); cap[1] = cpu_to_be32(cap[1]); /* this assumes bigendian! */ cap[0] += 1; capacity = &cap[0]; blksz = &cap[1]; debug("Capacity = 0x%lx, blocksz = 0x%lx\n", *capacity, *blksz); dev_desc->lba = *capacity; dev_desc->blksz = *blksz; dev_desc->log2blksz = LOG2(dev_desc->blksz); dev_desc->type = perq; debug(" address %d\n", dev_desc->target); debug("partype: %d\n", dev_desc->part_type); init_part(dev_desc); debug("partype: %d\n", dev_desc->part_type); return 1; }