diff options
author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-26 14:24:15 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-26 14:24:15 +0000 |
commit | 40ff317c5b2da14dfec26a313a3355977c1290e5 (patch) | |
tree | 7dd31865bd59ecd919564adcfc210f0b5f4f608b /nuttx/drivers/usbdev/usbmsc_scsi.c | |
parent | 8f0c521b7b0bc4722d46ba380a7592171eae4420 (diff) | |
download | px4-nuttx-40ff317c5b2da14dfec26a313a3355977c1290e5.tar.gz px4-nuttx-40ff317c5b2da14dfec26a313a3355977c1290e5.tar.bz2 px4-nuttx-40ff317c5b2da14dfec26a313a3355977c1290e5.zip |
More clean up of namespace
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4338 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/drivers/usbdev/usbmsc_scsi.c')
-rw-r--r-- | nuttx/drivers/usbdev/usbmsc_scsi.c | 2664 |
1 files changed, 2664 insertions, 0 deletions
diff --git a/nuttx/drivers/usbdev/usbmsc_scsi.c b/nuttx/drivers/usbdev/usbmsc_scsi.c new file mode 100644 index 000000000..799f81ea6 --- /dev/null +++ b/nuttx/drivers/usbdev/usbmsc_scsi.c @@ -0,0 +1,2664 @@ +/**************************************************************************** + * drivers/usbdev/usbmsc_scsi.c + * + * Copyright (C) 2008-2010, 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Mass storage class device. Bulk-only with SCSI subclass. + * + * References: + * "Universal Serial Bus Mass Storage Class, Specification Overview," + * Revision 1.2, USB Implementer's Forum, June 23, 2003. + * + * "Universal Serial Bus Mass Storage Class, Bulk-Only Transport," + * Revision 1.0, USB Implementer's Forum, September 31, 1999. + * + * "SCSI Primary Commands - 3 (SPC-3)," American National Standard + * for Information Technology, May 4, 2005 + * + * "SCSI Primary Commands - 4 (SPC-4)," American National Standard + * for Information Technology, July 19, 2008 + * + * "SCSI Block Commands -2 (SBC-2)," American National Standard + * for Information Technology, November 13, 2004 + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> +#include <unistd.h> +#include <pthread.h> +#include <string.h> +#include <errno.h> +#include <queue.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <nuttx/scsi.h> +#include <nuttx/usb/storage.h> +#include <nuttx/usb/usbdev.h> +#include <nuttx/usb/usbdev_trace.h> + +#include "usbmsc.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Configuration ************************************************************/ + +/* Race condition workaround found by David Hewson. This race condition + * "seems to relate to stalling the endpoint when a short response is + * generated which causes a residue to exist when the CSW would be returned. + * I think there's two issues here. The first being if the transfer which + * had just been queued before the stall had not completed then it wouldn’t + * then complete once the endpoint was stalled? The second is that the + * subsequent transfer for the CSW would be dropped on the floor (by the + * epsubmit() function) if the end point was still stalled as the control + * transfer to resume it hadn't occurred." + */ + +#define CONFIG_USBMSC_RACEWAR 1 + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/* Debug ********************************************************************/ + +#if defined(CONFIG_DEBUG_VERBOSE) && defined (CONFIG_DEBUG_USB) +static void usbmsc_dumpdata(const char *msg, const uint8_t *buf, + int buflen); +#else +# define usbmsc_dumpdata(msg, buf, len) +#endif + +/* Utility Support Functions ************************************************/ + +static uint16_t usbmsc_getbe16(uint8_t *buf); +static uint32_t usbmsc_getbe32(uint8_t *buf); +static void usbmsc_putbe16(uint8_t * buf, uint16_t val); +static void usbmsc_putbe24(uint8_t *buf, uint32_t val); +static void usbmsc_putbe32(uint8_t *buf, uint32_t val); +#if 0 /* not used */ +static uint16_t usbmsc_getle16(uint8_t *buf); +#endif +static uint32_t usbmsc_getle32(uint8_t *buf); +#if 0 /* not used */ +static void usbmsc_putle16(uint8_t * buf, uint16_t val); +#endif +static void usbmsc_putle32(uint8_t *buf, uint32_t val); + +/* SCSI Command Processing **************************************************/ + +static inline int usbmsc_cmdtestunitready(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdrequestsense(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf); +static inline int usbmsc_cmdread6(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdwrite6(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdinquiry(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf); +static inline int usbmsc_cmdmodeselect6(FAR struct usbmsc_dev_s *priv); +static int usbmsc_modepage(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf, uint8_t pcpgcode, int *mdlen); +static inline int usbmsc_cmdmodesense6(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf); +static inline int usbmsc_cmdstartstopunit(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdpreventmediumremoval(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdreadformatcapacity(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf); +static inline int usbmsc_cmdreadcapacity10(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf); +static inline int usbmsc_cmdread10(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdwrite10(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdverify10(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdsynchronizecache10(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdmodeselect10(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdmodesense10(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf); +static inline int usbmsc_cmdread12(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_cmdwrite12(FAR struct usbmsc_dev_s *priv); +static inline int usbmsc_setupcmd(FAR struct usbmsc_dev_s *priv, + uint8_t cdblen, uint8_t flags); + +/* SCSI Worker Thread *******************************************************/ + +static int usbmsc_idlestate(FAR struct usbmsc_dev_s *priv); +static int usbmsc_cmdparsestate(FAR struct usbmsc_dev_s *priv); +static int usbmsc_cmdreadstate(FAR struct usbmsc_dev_s *priv); +static int usbmsc_cmdwritestate(FAR struct usbmsc_dev_s *priv); +static int usbmsc_cmdfinishstate(FAR struct usbmsc_dev_s *priv); +static int usbmsc_cmdstatusstate(FAR struct usbmsc_dev_s *priv); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Debug + ****************************************************************************/ + +/**************************************************************************** + * Name: usbmsc_dumpdata + ****************************************************************************/ + +#if defined(CONFIG_DEBUG_VERBOSE) && defined (CONFIG_DEBUG_USB) +static void usbmsc_dumpdata(const char *msg, const uint8_t *buf, int buflen) +{ + int i; + + dbgprintf("%s:", msg); + for (i = 0; i < buflen; i++) + { + dbgprintf(" %02x", buf[i]); + } + dbgprintf("\n"); +} +#endif + +/**************************************************************************** + * Utility Support Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: usbmsc_getbe16 + * + * Description: + * Get a 16-bit big-endian value reference by the byte pointer + * + ****************************************************************************/ + +static uint16_t usbmsc_getbe16(uint8_t *buf) +{ + return ((uint16_t)buf[0] << 8) | ((uint16_t)buf[1]); +} + +/**************************************************************************** + * Name: usbmsc_getbe32 + * + * Description: + * Get a 32-bit big-endian value reference by the byte pointer + * + ****************************************************************************/ + +static uint32_t usbmsc_getbe32(uint8_t *buf) +{ + return ((uint32_t)buf[0] << 24) | ((uint32_t)buf[1] << 16) | + ((uint32_t)buf[2] << 8) | ((uint32_t)buf[3]); +} + +/**************************************************************************** + * Name: usbmsc_putbe16 + * + * Description: + * Store a 16-bit value in big-endian order to the location specified by + * a byte pointer + * + ****************************************************************************/ + +static void usbmsc_putbe16(uint8_t * buf, uint16_t val) +{ + buf[0] = val >> 8; + buf[1] = val; +} + +/**************************************************************************** + * Name: usbmsc_putbe24 + * + * Description: + * Store a 32-bit value in big-endian order to the location specified by + * a byte pointer + * + ****************************************************************************/ + +static void usbmsc_putbe24(uint8_t *buf, uint32_t val) +{ + buf[0] = val >> 16; + buf[1] = val >> 8; + buf[2] = val; +} + +/**************************************************************************** + * Name: usbmsc_putbe32 + * + * Description: + * Store a 32-bit value in big-endian order to the location specified by + * a byte pointer + * + ****************************************************************************/ + +static void usbmsc_putbe32(uint8_t *buf, uint32_t val) +{ + buf[0] = val >> 24; + buf[1] = val >> 16; + buf[2] = val >> 8; + buf[3] = val; +} + +/**************************************************************************** + * Name: usbmsc_getle16 + * + * Description: + * Get a 16-bit little-endian value reference by the byte pointer + * + ****************************************************************************/ + +#if 0 /* not used */ +static uint16_t usbmsc_getle16(uint8_t *buf) +{ + return ((uint16_t)buf[1] << 8) | ((uint16_t)buf[0]); +} +#endif + +/**************************************************************************** + * Name: usbmsc_getle32 + * + * Description: + * Get a 32-bit little-endian value reference by the byte pointer + * + ****************************************************************************/ + +static uint32_t usbmsc_getle32(uint8_t *buf) +{ + return ((uint32_t)buf[3] << 24) | ((uint32_t)buf[2] << 16) | + ((uint32_t)buf[1] << 8) | ((uint32_t)buf[0]); +} + +/**************************************************************************** + * Name: usbmsc_putle16 + * + * Description: + * Store a 16-bit value in little-endian order to the location specified by + * a byte pointer + * + ****************************************************************************/ + +#if 0 /* not used */ +static void usbmsc_putle16(uint8_t * buf, uint16_t val) +{ + buf[0] = val; + buf[1] = val >> 8; +} +#endif + +/**************************************************************************** + * Name: usbmsc_putle32 + * + * Description: + * Store a 32-bit value in little-endian order to the location specified by + * a byte pointer + * + ****************************************************************************/ + +static void usbmsc_putle32(uint8_t *buf, uint32_t val) +{ + buf[0] = val; + buf[1] = val >> 8; + buf[2] = val >> 16; + buf[3] = val >> 24; +} + +/**************************************************************************** + * SCSI Worker Thread + ****************************************************************************/ + +/**************************************************************************** + * Name: usbmsc_cmdtestunitready + * + * Description: + * Handle the SCSI_CMD_TESTUNITREADY command + * + ****************************************************************************/ + +static inline int usbmsc_cmdtestunitready(FAR struct usbmsc_dev_s *priv) +{ + int ret; + + priv->u.alloclen = 0; + ret = usbmsc_setupcmd(priv, 6, USBMSC_FLAGS_DIRNONE); + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdrequestsense + * + * Description: + * Handle the SCSI_CMD_REQUESTSENSE command + * + ****************************************************************************/ + +static inline int usbmsc_cmdrequestsense(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf) +{ + FAR struct scsicmd_requestsense_s *request = (FAR struct scsicmd_requestsense_s *)priv->cdb; + FAR struct scsiresp_fixedsensedata_s *response = (FAR struct scsiresp_fixedsensedata_s *)buf; + FAR struct usbmsc_lun_s *lun; + uint32_t sd; + uint32_t sdinfo; + uint8_t cdblen; + int ret; + + /* Extract the host allocation length */ + + priv->u.alloclen = request->alloclen; + + /* Get the expected length of the command (with hack for MS-Windows 12-byte + * REQUEST SENSE command. + */ + + cdblen = SCSICMD_REQUESTSENSE_SIZEOF; + if (cdblen != priv->cdblen) + { + /* Try MS-Windows REQUEST SENSE with cbw->cdblen == 12 */ + + cdblen = SCSICMD_REQUESTSENSE_MSSIZEOF; + } + + ret = usbmsc_setupcmd(priv, cdblen, + USBMSC_FLAGS_DIRDEVICE2HOST|USBMSC_FLAGS_LUNNOTNEEDED| + USBMSC_FLAGS_UACOKAY|USBMSC_FLAGS_RETAINSENSEDATA); + if (ret == OK) + { + lun = priv->lun; + if (!lun) + { + sd = SCSI_KCQIR_INVALIDLUN; + sdinfo = 0; + } + else + { + /* Get the saved sense data from the LUN structure */ + + sd = lun->sd; + sdinfo = lun->sdinfo; + + /* Discard the sense data */ + + lun->sd = SCSI_KCQ_NOSENSE; + lun->sdinfo = 0; + } + + /* Create the fixed sense data response */ + + memset(response, 0, SCSIRESP_FIXEDSENSEDATA_SIZEOF); + + response->code = SCSIRESP_SENSEDATA_RESPVALID|SCSIRESP_SENSEDATA_CURRENTFIXED; + response->flags = (uint8_t)(sd >> 16); + usbmsc_putbe32(response->info, sdinfo); + response->len = SCSIRESP_FIXEDSENSEDATA_SIZEOF - 7; + response->code2 = (uint8_t)(sd >> 8); + response->qual2 = (uint8_t)sd; + + priv->nreqbytes = SCSIRESP_FIXEDSENSEDATA_SIZEOF; + ret = OK; + } + + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdread6 + * + * Description: + * Handle the SCSI_CMD_READ6 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdread6(FAR struct usbmsc_dev_s *priv) +{ + FAR struct scsicmd_read6_s *read6 = (FAR struct scsicmd_read6_s*)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.xfrlen = (uint16_t)read6->xfrlen; + if (priv->u.xfrlen == 0) + { + priv->u.xfrlen = 256; + } + + ret = usbmsc_setupcmd(priv, SCSICMD_READ6_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST|USBMSC_FLAGS_BLOCKXFR); + if (ret == OK) + { + /* Get the Logical Block Address (LBA) from cdb[] as the starting sector */ + + priv->sector = (uint32_t)(read6->mslba & SCSICMD_READ6_MSLBAMASK) << 16 | (uint32_t)usbmsc_getbe16(read6->lslba); + + /* Verify that a block driver has been bound to the LUN */ + + if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ6MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Verify that sector lies in the range supported by the block driver */ + + else if (priv->sector >= lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ6LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + ret = -EINVAL; + } + + /* Looks like we are good to go */ + + else + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDREAD6), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDREAD; + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdwrite6 + * + * Description: + * Handle the SCSI_CMD_WRITE6 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdwrite6(FAR struct usbmsc_dev_s *priv) +{ + FAR struct scsicmd_write6_s *write6 = (FAR struct scsicmd_write6_s *)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.xfrlen = (uint16_t)write6->xfrlen; + if (priv->u.xfrlen == 0) + { + priv->u.xfrlen = 256; + } + + ret = usbmsc_setupcmd(priv, SCSICMD_WRITE6_SIZEOF, USBMSC_FLAGS_DIRHOST2DEVICE|USBMSC_FLAGS_BLOCKXFR); + if (ret == OK) + { + /* Get the Logical Block Address (LBA) from cdb[] as the starting sector */ + + priv->sector = (uint32_t)(write6->mslba & SCSICMD_WRITE6_MSLBAMASK) << 16 | (uint32_t)usbmsc_getbe16(write6->lslba); + + /* Verify that a block driver has been bound to the LUN */ + + if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE6MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Check for attempts to write to a read-only device */ + + else if (lun->readonly) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE6READONLY), 0); + lun->sd = SCSI_KCQWP_COMMANDNOTALLOWED; + ret = -EINVAL; + } + + /* Verify that sector lies in the range supported by the block driver */ + + else if (priv->sector >= lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE6LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + ret = -EINVAL; + } + + /* Looks like we are good to go */ + + else + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDWRITE6), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDWRITE; + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdinquiry + * + * Description: + * Handle SCSI_CMD_INQUIRY command + * + ****************************************************************************/ + +static inline int usbmsc_cmdinquiry(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf) +{ + FAR struct scscicmd_inquiry_s *inquiry = (FAR struct scscicmd_inquiry_s *)priv->cdb; + FAR struct scsiresp_inquiry_s *response = (FAR struct scsiresp_inquiry_s *)buf; + int len; + int ret; + + priv->u.alloclen = usbmsc_getbe16(inquiry->alloclen); + ret = usbmsc_setupcmd(priv, SCSICMD_INQUIRY_SIZEOF, + USBMSC_FLAGS_DIRDEVICE2HOST|USBMSC_FLAGS_LUNNOTNEEDED|USBMSC_FLAGS_UACOKAY); + if (ret == OK) + { + if (!priv->lun) + { + response->qualtype = SCSIRESP_INQUIRYPQ_NOTCAPABLE|SCSIRESP_INQUIRYPD_UNKNOWN; + } + else if ((inquiry->flags != 0) || (inquiry->pagecode != 0)) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_INQUIRYFLAGS), 0); + priv->lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + else + { + memset(response, 0, SCSIRESP_INQUIRY_SIZEOF); + priv->nreqbytes = SCSIRESP_INQUIRY_SIZEOF; + +#ifdef CONFIG_USBMSC_REMOVABLE + response->flags1 = SCSIRESP_INQUIRYFLAGS1_RMB; +#endif + response->version = 2; /* SCSI-2 */ + response->flags2 = 2; /* SCSI-2 INQUIRY response data format */ + response->len = SCSIRESP_INQUIRY_SIZEOF - 5; + + /* Strings */ + + memset(response->vendorid, ' ', 8+16+4); + + len = strlen(g_mscvendorstr); + DEBUGASSERT(len <= 8); + memcpy(response->vendorid, g_mscvendorstr, len); + + len = strlen(g_mscproductstr); + DEBUGASSERT(len <= 16); + memcpy(response->productid, g_mscproductstr, len); + + len = strlen(g_mscserialstr); + DEBUGASSERT(len <= 4); + memcpy(response->productid, g_mscserialstr, len); + } + } + + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdmodeselect6 + * + * Description: + * Handle SCSI_CMD_MODESELECT6 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdmodeselect6(FAR struct usbmsc_dev_s *priv) +{ + FAR struct scsicmd_modeselect6_s *modeselect = (FAR struct scsicmd_modeselect6_s *)priv->cdb; + + priv->u.alloclen = modeselect->plen; + (void)usbmsc_setupcmd(priv, SCSICMD_MODESELECT6_SIZEOF, USBMSC_FLAGS_DIRHOST2DEVICE); + + /* Not supported */ + + priv->lun->sd = SCSI_KCQIR_INVALIDCOMMAND; + return -EINVAL; +} + +/**************************************************************************** + * Name: usbmsc_modepage + * + * Description: + * Common logic for usbmsc_cmdmodesense6() and usbmsc_cmdmodesense10() + * + ****************************************************************************/ + +static int usbmsc_modepage(FAR struct usbmsc_dev_s *priv, FAR uint8_t *buf, + uint8_t pcpgcode, int *mdlen) +{ + FAR struct scsiresp_cachingmodepage_s *cmp = (FAR struct scsiresp_cachingmodepage_s *)buf; + + /* Saving parms not supported */ + + if ((pcpgcode & SCSICMD_MODESENSE_PCMASK) == SCSICMD_MODESENSE_PCSAVED) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_PCSAVED), 0); + priv->lun->sd = SCSI_KCQIR_SAVINGPARMSNOTSUPPORTED; + return -EINVAL; + } + + /* Only the caching mode page is supported: */ + + if ((pcpgcode & SCSICMD_MODESENSE_PGCODEMASK) == SCSIRESP_MODESENSE_PGCCODE_CACHING || + (pcpgcode & SCSICMD_MODESENSE_PGCODEMASK) == SCSIRESP_MODESENSE_PGCCODE_RETURNALL) + { + memset(cmp, 0, 12); + cmp->pgcode = SCSIRESP_MODESENSE_PGCCODE_CACHING; + cmp->len = 10; /* n-2 */ + + /* None of the fields are changeable */ + + if (((pcpgcode & SCSICMD_MODESENSE_PCMASK) != SCSICMD_MODESENSE_PCCHANGEABLE)) + { + cmp->flags1 = SCSIRESP_CACHINGMODEPG_WCE; /* Write cache enable */ + cmp->dpflen[0] = 0xff; /* Disable prefetch transfer length = 0xffffffff */ + cmp->dpflen[1] = 0xff; + cmp->maxpf[0] = 0xff; /* Maximum pre-fetch = 0xffffffff */ + cmp->maxpf[1] = 0xff; + cmp->maxpfc[0] = 0xff; /* Maximum pref-fetch ceiling = 0xffffffff */ + cmp->maxpfc[1] = 0xff; + } + + /* Return the mode data length */ + + *mdlen = 12; /* Only the first 12-bytes of caching mode page sent */ + return OK; + } + else + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_MODEPAGEFLAGS), pcpgcode); + priv->lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + return -EINVAL; + } +} + +/**************************************************************************** + * Name: usbmsc_cmdmodesense6 + * + * Description: + * Handle SCSI_CMD_MODESENSE6 command + * + ****************************************************************************/ + +static int inline usbmsc_cmdmodesense6(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf) +{ + FAR struct scsicmd_modesense6_s *modesense = (FAR struct scsicmd_modesense6_s *)priv->cdb; + FAR struct scsiresp_modeparameterhdr6_s *mph = (FAR struct scsiresp_modeparameterhdr6_s *)buf; + int mdlen; + int ret; + + priv->u.alloclen = modesense->alloclen; + ret = usbmsc_setupcmd(priv, SCSICMD_MODESENSE6_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST); + if (ret == OK) + { + if ((modesense->flags & ~SCSICMD_MODESENSE6_DBD) != 0 || modesense->subpgcode != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_MODESENSE6FLAGS), 0); + priv->lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + else + { + /* The response consists of: + * + * (1) A MODESENSE6-specific mode parameter header, + * (2) A variable length list of block descriptors, and + * (3) A variable length list of mode page formats + */ + + mph->type = 0; /* Medium type */ + mph->param = (priv->lun->readonly ? SCSIRESP_MODEPARMHDR_DAPARM_WP : 0x00); + mph->bdlen = 0; /* Block descriptor length */ + + /* There are no block descriptors, only the following mode page: */ + + ret = usbmsc_modepage(priv, &buf[SCSIRESP_MODEPARAMETERHDR6_SIZEOF], modesense->pcpgcode, &mdlen); + if (ret == OK) + { + /* Store the mode data length and return the total message size */ + + mph->mdlen = mdlen - 1; + priv->nreqbytes = mdlen + SCSIRESP_MODEPARAMETERHDR6_SIZEOF; + } + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdstartstopunit + * + * Description: + * Handle SCSI_CMD_STARTSTOPUNIT command + * + ****************************************************************************/ + +static inline int usbmsc_cmdstartstopunit(FAR struct usbmsc_dev_s *priv) +{ + int ret; + + priv->u.alloclen = 0; + ret = usbmsc_setupcmd(priv, SCSICMD_STARTSTOPUNIT_SIZEOF, USBMSC_FLAGS_DIRNONE); + if (ret == OK) + { +#ifndef CONFIG_USBMSC_REMOVABLE + /* This command is not valid if the media is not removable */ + + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_NOTREMOVABLE), 0); + lun->sd = SCSI_KCQIR_INVALIDCOMMAND; + ret = -EINVAL; +#endif + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdpreventmediumremoval + * + * Description: + * Handle SCSI_CMD_PREVENTMEDIAREMOVAL command + * + ****************************************************************************/ + +static inline int usbmsc_cmdpreventmediumremoval(FAR struct usbmsc_dev_s *priv) +{ +#ifdef CONFIG_USBMSC_REMOVABLE + FAR struct scsicmd_preventmediumremoval_s *pmr = (FAR struct scsicmd_preventmediumremoval_s *)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; +#endif + int ret; + + priv->u.alloclen = 0; + ret = usbmsc_setupcmd(priv, SCSICMD_PREVENTMEDIUMREMOVAL_SIZEOF, USBMSC_FLAGS_DIRNONE); + if (ret == OK) + { +#ifndef CONFIG_USBMSC_REMOVABLE + lun->sd = SCSI_KCQIR_INVALIDCOMMAND; + ret = -EINVAL; +#else + if ((pmr->prevent & ~SCSICMD_PREVENTMEDIUMREMOVAL_TRANSPORT) != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_PREVENTMEDIUMREMOVALPREVENT), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + + lun->locked = pmr->prevent & SCSICMD_PREVENTMEDIUMREMOVAL_TRANSPORT; +#endif + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdreadformatcapacity + * + * Description: + * Handle SCSI_CMD_READFORMATCAPACITIES command (MMC) + * + ****************************************************************************/ + +static inline int usbmsc_cmdreadformatcapacity(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf) +{ + FAR struct scsicmd_readformatcapcacities_s *rfc = (FAR struct scsicmd_readformatcapcacities_s *)priv->cdb; + FAR struct scsiresp_readformatcapacities_s *hdr; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.alloclen = usbmsc_getbe16(rfc->alloclen); + ret = usbmsc_setupcmd(priv, SCSICMD_READFORMATCAPACITIES_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST); + if (ret == OK) + { + hdr = (FAR struct scsiresp_readformatcapacities_s *)buf; + memset(hdr, 0, SCSIRESP_READFORMATCAPACITIES_SIZEOF); + hdr->listlen = SCSIRESP_CURRCAPACITYDESC_SIZEOF; + + /* Only the Current/Maximum Capacity Descriptor follows the header */ + + usbmsc_putbe32(hdr->nblocks, lun->nsectors); + hdr->type = SCIRESP_RDFMTCAPACITIES_FORMATED; + usbmsc_putbe24(hdr->blocklen, lun->sectorsize); + priv->nreqbytes = SCSIRESP_READFORMATCAPACITIES_SIZEOF; + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdreadcapacity10 + * + * Description: + * Handle SCSI_CMD_READCAPACITY10 command + * + ****************************************************************************/ + +static int inline usbmsc_cmdreadcapacity10(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf) +{ + FAR struct scsicmd_readcapacity10_s *rcc = (FAR struct scsicmd_readcapacity10_s *)priv->cdb; + FAR struct scsiresp_readcapacity10_s *rcr = (FAR struct scsiresp_readcapacity10_s *)buf; + FAR struct usbmsc_lun_s *lun = priv->lun; + uint32_t lba; + int ret; + + priv->u.alloclen = SCSIRESP_READCAPACITY10_SIZEOF; /* Fake the allocation length */ + ret = usbmsc_setupcmd(priv, SCSICMD_READCAPACITY10_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST); + if (ret == OK) + { + /* Check the PMI and LBA fields */ + + lba = usbmsc_getbe32(rcc->lba); + + if (rcc->pmi > 1 || (rcc->pmi == 0 && lba != 0)) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READCAPACITYFLAGS), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + else + { + usbmsc_putbe32(rcr->lba, lun->nsectors - 1); + usbmsc_putbe32(&buf[4], lun->sectorsize); + priv->nreqbytes = SCSIRESP_READCAPACITY10_SIZEOF; + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdread10 + * + * Description: + * Handle SCSI_CMD_READ10 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdread10(FAR struct usbmsc_dev_s *priv) +{ + struct scsicmd_read10_s *read10 = (struct scsicmd_read10_s*)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.xfrlen = usbmsc_getbe16(read10->xfrlen); + ret = usbmsc_setupcmd(priv, SCSICMD_READ10_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST|USBMSC_FLAGS_BLOCKXFR); + if (ret == OK) + { + /* Get the Logical Block Address (LBA) from cdb[] as the starting sector */ + + priv->sector = usbmsc_getbe32(read10->lba); + + /* Verify that we can support this read command */ + + if ((read10->flags & ~(SCSICMD_READ10FLAGS_DPO|SCSICMD_READ10FLAGS_FUA)) != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ10FLAGS), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + + /* Verify that a block driver has been bound to the LUN */ + + else if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ10MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Verify that LBA lies in the range supported by the block driver */ + + else if (priv->sector >= lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ10LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + ret = -EINVAL; + } + + /* Looks like we are good to go */ + + else + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDREAD10), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDREAD; + } + } + + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdwrite10 + * + * Description: + * Handle SCSI_CMD_WRITE10 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdwrite10(FAR struct usbmsc_dev_s *priv) +{ + struct scsicmd_write10_s *write10 = (struct scsicmd_write10_s *)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.xfrlen = usbmsc_getbe16(write10->xfrlen); + ret = usbmsc_setupcmd(priv, SCSICMD_WRITE10_SIZEOF, USBMSC_FLAGS_DIRHOST2DEVICE|USBMSC_FLAGS_BLOCKXFR); + if (ret == OK) + { + /* Get the Logical Block Address (LBA) from cdb[] as the starting sector */ + + priv->sector = usbmsc_getbe32(write10->lba); + + /* Verify that we can support this write command */ + + if ((write10->flags & ~(SCSICMD_WRITE10FLAGS_DPO|SCSICMD_WRITE10FLAGS_FUA)) != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE10FLAGS), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + + /* Verify that a block driver has been bound to the LUN */ + + else if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE10MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Check for attempts to write to a read-only device */ + + else if (lun->readonly) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE10READONLY), 0); + lun->sd = SCSI_KCQWP_COMMANDNOTALLOWED; + ret = -EINVAL; + } + + /* Verify that LBA lies in the range supported by the block driver */ + + else if (priv->sector >= lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE10LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + ret = -EINVAL; + } + + /* Looks like we are good to go */ + + else + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDWRITE10), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDWRITE; + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdverify10 + * + * Description: + * Handle SCSI_CMD_VERIFY10 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdverify10(FAR struct usbmsc_dev_s *priv) +{ + FAR struct scsicmd_verify10_s *verf = (FAR struct scsicmd_verify10_s *)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + uint32_t lba; + uint16_t blocks; + size_t sector; + ssize_t nread; + int ret; + int i; + + priv->u.alloclen = 0; + ret = usbmsc_setupcmd(priv, SCSICMD_VERIFY10_SIZEOF, USBMSC_FLAGS_DIRNONE); + if (ret == OK) + { + /* Verify the starting and ending LBA */ + + lba = usbmsc_getbe32(verf->lba); + blocks = usbmsc_getbe16(verf->len); + + if ((verf->flags & ~SCSICMD_VERIFY10_DPO) != 0 || verf->groupno != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_VERIFY10FLAGS), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + else if (blocks == 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_VERIFY10NOBLOCKS), 0); + ret = -EIO; /* No reply */ + } + + /* Verify that a block driver has been bound to the LUN */ + + else if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_VERIFY10MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Verify that LBA lies in the range supported by the block driver */ + + else if (lba >= lun->nsectors || lba + blocks > lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_VERIFY10LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + ret = -EINVAL; + } + else + { + /* Try to read the requested blocks */ + + for (i = 0, sector = lba + lun->startsector; i < blocks; i++, sector++) + { + nread = USBMSC_DRVR_READ(lun, priv->iobuffer, sector, 1); + if (nread < 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_VERIFY10READFAIL), i); + lun->sd = SCSI_KCQME_UNRRE1; + lun->sdinfo = sector; + ret = -EIO; + break; + } + } + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdsynchronizecache10 + * + * Description: + * Handle SCSI_CMD_SYNCHCACHE10 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdsynchronizecache10(FAR struct usbmsc_dev_s *priv) +{ + int ret; + + priv->u.alloclen = 0; + + /* Verify that we have the LUN structure and the block driver has been bound */ + + if (!priv->lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SYNCCACHEMEDIANOTPRESENT), 0); + priv->lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + else + { + ret = usbmsc_setupcmd(priv, SCSICMD_SYNCHRONIZECACHE10_SIZEOF, USBMSC_FLAGS_DIRNONE); + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdmodeselect10 + * + * Description: + * Handle SCSI_CMD_MODESELECT10 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdmodeselect10(FAR struct usbmsc_dev_s *priv) +{ + FAR struct scsicmd_modeselect10_s *modeselect = (FAR struct scsicmd_modeselect10_s *)priv->cdb; + + priv->u.alloclen = usbmsc_getbe16(modeselect->parmlen); + (void)usbmsc_setupcmd(priv, SCSICMD_MODESELECT10_SIZEOF, USBMSC_FLAGS_DIRHOST2DEVICE); + + /* Not supported */ + + priv->lun->sd = SCSI_KCQIR_INVALIDCOMMAND; + return -EINVAL; +} + +/**************************************************************************** + * Name: usbmsc_cmdmodesense10 + * + * Description: + * Handle SCSI_CMD_MODESENSE10 command + * + ****************************************************************************/ + +static int inline usbmsc_cmdmodesense10(FAR struct usbmsc_dev_s *priv, + FAR uint8_t *buf) +{ + FAR struct scsicmd_modesense10_s *modesense = (FAR struct scsicmd_modesense10_s *)priv->cdb; + FAR struct scsiresp_modeparameterhdr10_s *mph = (FAR struct scsiresp_modeparameterhdr10_s *)buf; + int mdlen; + int ret; + + priv->u.alloclen = usbmsc_getbe16(modesense->alloclen); + ret = usbmsc_setupcmd(priv, SCSICMD_MODESENSE10_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST); + if (ret == OK) + { + if ((modesense->flags & ~SCSICMD_MODESENSE10_DBD) != 0 || modesense->subpgcode != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_MODESENSE10FLAGS), 0); + priv->lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + else + { + /* The response consists of: + * + * (1) A MODESENSE6-specific mode parameter header, + * (2) A variable length list of block descriptors, and + * (3) A variable lengtth list of mode page formats + */ + + memset(mph, 0, SCSIRESP_MODEPARAMETERHDR10_SIZEOF); + mph->param = (priv->lun->readonly ? SCSIRESP_MODEPARMHDR_DAPARM_WP : 0x00); + + /* There are no block descriptors, only the following mode page: */ + + ret = usbmsc_modepage(priv, &buf[SCSIRESP_MODEPARAMETERHDR10_SIZEOF], modesense->pcpgcode, &mdlen); + if (ret == OK) + { + /* Store the mode data length and return the total message size */ + + usbmsc_putbe16(mph->mdlen, mdlen - 2); + priv->nreqbytes = mdlen + SCSIRESP_MODEPARAMETERHDR10_SIZEOF; + } + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdread12 + * + * Description: + * Handle SCSI_CMD_READ12 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdread12(FAR struct usbmsc_dev_s *priv) +{ + struct scsicmd_read12_s *read12 = (struct scsicmd_read12_s*)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.xfrlen = usbmsc_getbe32(read12->xfrlen); + ret = usbmsc_setupcmd(priv, SCSICMD_READ12_SIZEOF, USBMSC_FLAGS_DIRDEVICE2HOST|USBMSC_FLAGS_BLOCKXFR); + if (ret == OK) + { + /* Get the Logical Block Address (LBA) from cdb[] as the starting sector */ + + priv->sector = usbmsc_getbe32(read12->lba); + + /* Verify that we can support this read command */ + + if ((read12->flags & ~(SCSICMD_READ12FLAGS_DPO|SCSICMD_READ12FLAGS_FUA)) != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ12FLAGS), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + ret = -EINVAL; + } + + /* Verify that a block driver has been bound to the LUN */ + + else if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ12MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Verify that LBA lies in the range supported by the block driver */ + + else if (priv->sector >= lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_READ12LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + ret = -EINVAL; + } + + /* Looks like we are good to go */ + + else + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDREAD12), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDREAD; + } + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdwrite12 + * + * Description: + * Handle SCSI_CMD_WRITE12 command + * + ****************************************************************************/ + +static inline int usbmsc_cmdwrite12(FAR struct usbmsc_dev_s *priv) +{ + struct scsicmd_write12_s *write12 = (struct scsicmd_write12_s *)priv->cdb; + FAR struct usbmsc_lun_s *lun = priv->lun; + int ret; + + priv->u.xfrlen = usbmsc_getbe32(write12->xfrlen); + ret = usbmsc_setupcmd(priv, SCSICMD_WRITE12_SIZEOF, USBMSC_FLAGS_DIRHOST2DEVICE|USBMSC_FLAGS_BLOCKXFR); + if (ret == OK) + { + /* Get the Logical Block Address (LBA) from cdb[] as the starting sector */ + + priv->sector = usbmsc_getbe32(write12->lba); + + /* Verify that we can support this write command */ + + if ((write12->flags & ~(SCSICMD_WRITE12FLAGS_DPO|SCSICMD_WRITE12FLAGS_FUA)) != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE12FLAGS), 0); + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + } + + /* Verify that a block driver has been bound to the LUN */ + + else if (!lun->inode) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE12MEDIANOTPRESENT), 0); + lun->sd = SCSI_KCQNR_MEDIANOTPRESENT; + ret = -EINVAL; + } + + /* Check for attempts to write to a read-only device */ + + else if (lun->readonly) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE12READONLY), 0); + lun->sd = SCSI_KCQWP_COMMANDNOTALLOWED; + } + + /* Verify that LBA lies in the range supported by the block driver */ + + else if (priv->sector >= lun->nsectors) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRITE12LBARANGE), 0); + lun->sd = SCSI_KCQIR_LBAOUTOFRANGE; + } + + /* Looks like we are good to go */ + + else + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDWRITE12), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDWRITE; + return OK; + } + } + + return ret; +} + +/**************************************************************************** + * Name: usbmsc_setupcmd + * + * Description: + * Called after each SCSI command is identified in order to perform setup + * and verification operations that are common to all SCSI commands. This + * function performs the following common setup operations: + * + * 1. Determine the direction of the response + * 2. Verify lengths + * 3. Setup and verify the LUN + * + * Includes special logic for INQUIRY and REQUESTSENSE commands + * + ****************************************************************************/ + +static int inline usbmsc_setupcmd(FAR struct usbmsc_dev_s *priv, uint8_t cdblen, uint8_t flags) +{ + FAR struct usbmsc_lun_s *lun = NULL; + uint32_t datlen; + uint8_t dir = flags & USBMSC_FLAGS_DIRMASK; + int ret = OK; + + /* Verify the LUN and set up the current LUN reference in the + * device structure + */ + + if (priv->cbwlun < priv->nluns) + { + /* LUN number is valid in a valid range, but the LUN is not necessarily + * bound to a block driver. That will be checked as necessary in each + * individual command. + */ + + lun = &priv->luntab[priv->cbwlun]; + priv->lun = lun; + } + + /* Only a few commands may specify unsupported LUNs */ + + else if ((flags & USBMSC_FLAGS_LUNNOTNEEDED) == 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDBADLUN), priv->cbwlun); + ret = -EINVAL; + } + + /* Extract the direction and data transfer length */ + + dir = flags & USBMSC_FLAGS_DIRMASK; /* Expected data direction */ + datlen = 0; + if ((flags & USBMSC_FLAGS_BLOCKXFR) == 0) + { + /* Non-block transfer. Data length: Host allocation to receive data + * (only for device-to-host transfers. At present, alloclen is set + * to zero for all host-to-device, non-block transfers. + */ + + datlen = priv->u.alloclen; + } + else if (lun) + { + /* Block transfer: Calculate the total size of all sectors to be transferred */ + + datlen = priv->u.alloclen * lun->sectorsize; + } + + /* Check the data direction. This was set up at the end of the + * IDLE state when the CBW was parsed, but if there is no data, + * then the direction is none. + */ + + if (datlen == 0) + { + /* No data.. then direction is none */ + + dir = USBMSC_FLAGS_DIRNONE; + } + + /* Compare the expected data length in the command to the data length + * in the CBW. + */ + + else if (priv->cbwlen < datlen) + { + /* Clip to the length in the CBW and declare a phase error */ + + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_PHASEERROR1), priv->cdb[0]); + if ((flags & USBMSC_FLAGS_BLOCKXFR) != 0) + { + priv->u.alloclen = priv->cbwlen; + } + else + { + priv->u.xfrlen = priv->cbwlen / lun->sectorsize; + } + + priv->phaseerror = 1; + } + + /* Initialize the residue */ + + priv->residue = priv->cbwlen; + + /* Conflicting data directions is a phase error */ + + if (priv->cbwdir != dir && datlen > 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_PHASEERROR2), priv->cdb[0]); + priv->phaseerror = 1; + ret = -EINVAL; + } + + /* Compare the length of data in the cdb[] with the expected length + * of the command. + */ + + if (cdblen != priv->cdblen) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_PHASEERROR3), priv->cdb[0]); + priv->phaseerror = 1; + ret = -EINVAL; + } + + if (lun) + { + /* Retain the sense data for the REQUEST SENSE command */ + + if ((flags & USBMSC_FLAGS_RETAINSENSEDATA) == 0) + { + /* Discard the sense data */ + + lun->sd = SCSI_KCQ_NOSENSE; + lun->sdinfo = 0; + } + + /* If a unit attention condition exists, then only a restricted set of + * commands is permitted. + */ + + if (lun->uad != SCSI_KCQ_NOSENSE && (flags & USBMSC_FLAGS_UACOKAY) != 0) + { + /* Command not permitted */ + + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDUNEVIOLATION), priv->cbwlun); + lun->sd = lun->uad; + lun->uad = SCSI_KCQ_NOSENSE; + ret = -EINVAL; + } + } + + /* The final, 1-byte field of every SCSI command is the Control field which + * must be zero + */ + + if (priv->cdb[cdblen-1] != 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SCSICMDCONTROL), 0); + if (lun) + { + lun->sd = SCSI_KCQIR_INVALIDFIELDINCBA; + } + ret = -EINVAL; + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_idlestate + * + * Description: + * Called from the worker thread in the USBMSC_STATE_IDLE state. Checks + * for the receipt of a bulk CBW. + * + * Returned value: + * If no new, valid CBW is available, this function returns a negated errno. + * Otherwise, when a new CBW is successfully parsed, this function sets + * priv->thstate to USBMSC_STATE_CMDPARSE and returns OK. + * + ****************************************************************************/ + +static int usbmsc_idlestate(FAR struct usbmsc_dev_s *priv) +{ + FAR struct usbmsc_req_s *privreq; + FAR struct usbdev_req_s *req; + FAR struct usbmsc_cbw_s *cbw; + irqstate_t flags; + int ret = -EINVAL; + + /* Take a request from the rdreqlist */ + + flags = irqsave(); + privreq = (FAR struct usbmsc_req_s *)sq_remfirst(&priv->rdreqlist); + irqrestore(flags); + + /* Has anything been received? If not, just return an error. + * This will cause us to remain in the IDLE state. When a USB request is + * received, the worker thread will be awakened in the USBMSC_STATE_IDLE + * and we will be called again. + */ + + if (!privreq) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_IDLERDREQLISTEMPTY), 0); + return -ENOMEM; + } + + req = privreq->req; + cbw = (FAR struct usbmsc_cbw_s *)req->buf; + + /* Handle the CBW */ + + usbmsc_dumpdata("SCSCI CBW", (uint8_t*)cbw, USBMSC_CBW_SIZEOF - USBMSC_MAXCDBLEN); + usbmsc_dumpdata(" CDB", cbw->cdb, MIN(cbw->cdblen, USBMSC_MAXCDBLEN)); + + /* Check for properly formatted CBW? */ + + if (req->xfrd != USBMSC_CBW_SIZEOF || + cbw->signature[0] != 'U' || + cbw->signature[1] != 'S' || + cbw->signature[2] != 'B' || + cbw->signature[3] != 'C') + { + /* CBS BAD: Stall the bulk endpoints. If the CBW is bad we must stall the + * bulk IN endpoint and either (1) stall the bulk OUT endpoint, or + * (2) discard data from the endpoint. + */ + + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_INVALIDCBWSIGNATURE), 0); + EP_STALL(priv->epbulkout); + EP_STALL(priv->epbulkin); + } + + /* Is the CBW meaningful? */ + + else if (cbw->lun >= priv->nluns || (cbw->flags & ~USBMSC_CBWFLAG_IN) != 0 || + cbw->cdblen < 6 || cbw->cdblen > USBMSC_MAXCDBLEN) + { + /* CBS BAD: Stall the bulk endpoints. If the CBW is bad we must stall the + * bulk IN endpoint and either (1) stall the bulk OUT endpoint, or + * (2) discard data from the endpoint. + */ + + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_INVALIDCBWCONTENT), 0); + EP_STALL(priv->epbulkout); + EP_STALL(priv->epbulkin); + } + + /* Save the information from the CBW */ + + else + { + /* Extract the CDB and copy the whole CBD[] for later use */ + + priv->cdblen = cbw->cdblen; + memcpy(priv->cdb, cbw->cdb, priv->cdblen); + + /* Extract the data direction */ + + if ((cbw->flags & USBMSC_CBWFLAG_IN) != 0) + { + /* IN: Device-to-host */ + + priv->cbwdir = USBMSC_FLAGS_DIRDEVICE2HOST; + } + else + { + /* OUT: Host-to-device */ + + priv->cbwdir = USBMSC_FLAGS_DIRHOST2DEVICE; + } + + /* Get the max size of the data response */ + + priv->cbwlen = usbmsc_getle32(cbw->datlen); + if (priv->cbwlen == 0) + { + /* No length? Then no direction either */ + + priv->cbwdir = USBMSC_FLAGS_DIRNONE; + } + + /* Extract and save the LUN index and TAG value */ + + priv->cbwlun = cbw->lun; + priv->cbwtag = usbmsc_getle32(cbw->tag); + + /* Return the read request to the bulk out endpoint for re-filling */ + + req = privreq->req; + req->len = CONFIG_USBMSC_BULKOUTREQLEN; + req->priv = privreq; + req->callback = usbmsc_rdcomplete; + + if (EP_SUBMIT(priv->epbulkout, req) != OK) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_IDLERDSUBMIT), (uint16_t)-ret); + } + + /* Change to the CMDPARSE state and return success */ + + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_IDLECMDPARSE), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDPARSE; + ret = OK; + } + + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdparsestate + * + * Description: + * Called from the worker thread in the USBMSC_STATE_CMDPARSE state. + * This state is entered when usbmsc_idlestate obtains a valid CBW + * containing SCSI commands. This function processes those SCSI commands. + * + * Returned value: + * If no write request is available or certain other errors occur, this + * function returns a negated errno and stays in the USBMSC_STATE_CMDPARSE + * state. Otherwise, when the new CBW is successfully process, this + * function sets priv->thstate to one of USBMSC_STATE_CMDREAD, + * USBMSC_STATE_CMDWRITE, or USBMSC_STATE_CMDFINISH and returns OK. + * + ****************************************************************************/ + +static int usbmsc_cmdparsestate(FAR struct usbmsc_dev_s *priv) +{ + FAR struct usbmsc_req_s *privreq; + FAR uint8_t *buf; + int ret = -EINVAL; + + usbmsc_dumpdata("SCSCI CDB", priv->cdb, priv->cdblen); + + /* Check if there is a request in the wrreqlist that we will be able to + * use for data or status. + */ + + privreq = (FAR struct usbmsc_req_s *)sq_peek(&priv->wrreqlist); + + /* If there no request structures available, then just return an error. + * This will cause us to remain in the CMDPARSE state. When a request is + * returned, the worker thread will be awakened in the USBMSC_STATE_CMDPARSE + * and we will be called again. + */ + + if (!privreq) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDPARSEWRREQLISTEMPTY), 0); + return -ENOMEM; + } + DEBUGASSERT(privreq->req && privreq->req->buf); + buf = privreq->req->buf; + + /* Assume that no errors will be encountered */ + + priv->phaseerror = 0; + priv->shortpacket = 0; + + /* No data is buffered */ + + priv->nsectbytes = 0; + priv->nreqbytes = 0; + + /* Get exclusive access to the block driver */ + + pthread_mutex_lock(&priv->mutex); + switch (priv->cdb[0]) + { + case SCSI_CMD_TESTUNITREADY: /* 0x00 Mandatory */ + ret = usbmsc_cmdtestunitready(priv); + break; + + /* case SCSI_CMD_REZEROUNIT: * 0x01 Obsolete + * * 0x02 Vendor-specific */ + + case SCSI_CMD_REQUESTSENSE: /* 0x03 Mandatory */ + ret = usbmsc_cmdrequestsense(priv, buf); + break; + + /* case SCSI_CMD_FORMAT_UNIT: * 0x04 Mandatory, but not implemented + * * 0x05 Vendor specific + * * 0x06 Vendor specific + * case SCSI_CMD_REASSIGNBLOCKS: * 0x07 Optional */ + + case SCSI_CMD_READ6: /* 0x08 Mandatory */ + ret = usbmsc_cmdread6(priv); + break; + + /* * 0x09 Vendor specific */ + + case SCSI_CMD_WRITE6: /* 0x0a Optional */ + ret = usbmsc_cmdwrite6(priv); + break; + + /* case SCSI_CMD_SEEK6: * 0x0b Obsolete + * * 0x0c-0x10 Vendor specific + * case SCSI_CMD_SPACE6: * 0x11 Vendor specific */ + + case SCSI_CMD_INQUIRY: /* 0x12 Mandatory */ + ret = usbmsc_cmdinquiry(priv, buf); + break; + + /* * 0x13-0x14 Vendor specific */ + + case SCSI_CMD_MODESELECT6: /* 0x15 Optional */ + ret = usbmsc_cmdmodeselect6(priv); + break; + + /* case SCSI_CMD_RESERVE6: * 0x16 Obsolete + * case SCSI_CMD_RELEASE6: * 0x17 Obsolete + * case SCSI_CMD_COPY: * 0x18 Obsolete + * * 0x19 Vendor specific */ + + case SCSI_CMD_MODESENSE6: /* 0x1a Optional */ + ret = usbmsc_cmdmodesense6(priv, buf); + break; + + case SCSI_CMD_STARTSTOPUNIT: /* 0x1b Optional */ + ret = usbmsc_cmdstartstopunit(priv); + break; + + /* case SCSI_CMD_RECEIVEDIAGNOSTICRESULTS: * 0x1c Optional + * case SCSI_CMD_SENDDIAGNOSTIC: * 0x1d Mandatory, but not implemented */ + + case SCSI_CMD_PREVENTMEDIAREMOVAL: /* 0x1e Optional */ + ret = usbmsc_cmdpreventmediumremoval(priv); + break; + + /* * 0x20-22 Vendor specific */ + case SCSI_CMD_READFORMATCAPACITIES: /* 0x23 Vendor-specific (defined in MMC spec) */ + ret = usbmsc_cmdreadformatcapacity(priv, buf); + break; + /* * 0x24 Vendor specific */ + + case SCSI_CMD_READCAPACITY10: /* 0x25 Mandatory */ + ret = usbmsc_cmdreadcapacity10(priv, buf); + break; + + /* * 0x26-27 Vendor specific */ + case SCSI_CMD_READ10: /* 0x28 Mandatory */ + ret = usbmsc_cmdread10(priv); + break; + + /* * 0x29 Vendor specific */ + + case SCSI_CMD_WRITE10: /* 0x2a Optional */ + ret = usbmsc_cmdwrite10(priv); + break; + + /* case SCSI_CMD_SEEK10: * 0x2b Obsolete + * * 0x2c-2d Vendor specific + * case SCSI_CMD_WRITEANDVERIFY: * 0x2e Optional */ + + case SCSI_CMD_VERIFY10: /* 0x2f Optional, but needed my MS Windows */ + ret = usbmsc_cmdverify10(priv); + break; + + /* case SCSI_CMD_SEARCHDATAHIGH: * 0x30 Obsolete + * case SCSI_CMD_SEARCHDATAEQUAL: * 0x31 Obsolete + * case SCSI_CMD_SEARCHDATALOW: * 0x32 Obsolete + * case SCSI_CMD_SETLIMITS10: * 0x33 Obsolete + * case SCSI_CMD_PREFETCH10: * 0x34 Optional */ + + case SCSI_CMD_SYNCHCACHE10: /* 0x35 Optional */ + ret = usbmsc_cmdsynchronizecache10(priv); + break; + + /* case SCSI_CMD_LOCKCACHE: * 0x36 Obsolete + * case SCSI_CMD_READDEFECTDATA10: * 0x37 Optional + * case SCSI_CMD_COMPARE: * 0x39 Obsolete + * case SCSI_CMD_COPYANDVERIFY: * 0x3a Obsolete + * case SCSI_CMD_WRITEBUFFER: * 0x3b Optional + * case SCSI_CMD_READBUFFER: * 0x3c Optional + * case SCSI_CMD_READLONG10: * 0x3e Optional + * case SCSI_CMD_WRITELONG10: * 0x3f Optional + * case SCSI_CMD_CHANGEDEFINITION: * 0x40 Obsolete + * case SCSI_CMD_WRITESAME10: * 0x41 Optional + * case SCSI_CMD_LOGSELECT: * 0x4c Optional + * case SCSI_CMD_LOGSENSE: * 0x4d Optional + * case SCSI_CMD_XDWRITE10: * 0x50 Optional + * case SCSI_CMD_XPWRITE10: * 0x51 Optional + * case SCSI_CMD_XDREAD10: * 0x52 Optional */ + + case SCSI_CMD_MODESELECT10: /* 0x55 Optional */ + ret = usbmsc_cmdmodeselect10(priv); + break; + + /* case SCSI_CMD_RESERVE10: * 0x56 Obsolete + * case SCSI_CMD_RELEASE10: * 0x57 Obsolete */ + + case SCSI_CMD_MODESENSE10: /* 0x5a Optional */ + ret = usbmsc_cmdmodesense10(priv, buf); + break; + + /* case SCSI_CMD_PERSISTENTRESERVEIN: * 0x5e Optional + * case SCSI_CMD_PERSISTENTRESERVEOUT: * 0x5f Optional + * case SCSI_CMD_32: * 0x7f Optional + * case SCSI_CMD_XDWRITEEXTENDED: * 0x80 Obsolete + * case SCSI_CMD_REBUILD: * 0x81 Obsolete + * case SCSI_CMD_REGENERATE: * 0x82 Obsolete + * case SCSI_CMD_EXTENDEDCOPY: * 0x83 Optional + * case SCSI_CMD_COPYRESULTS: * 0x84 Optional + * case SCSI_CMD_ACCESSCONTROLIN: * 0x86 Optional + * case SCSI_CMD_ACCESSCONTROLOUT: * 0x87 Optional + * case SCSI_CMD_READ16: * 0x88 Optional + * case SCSI_CMD_WRITE16: * 0x8a Optional + * case SCSI_CMD_READATTRIBUTE: * 0x8c Optional + * case SCSI_CMD_WRITEATTRIBUTE: * 0x8d Optional + * case SCSI_CMD_WRITEANDVERIFY16: * 0x8e Optional + * case SCSI_CMD_SYNCHCACHE16: * 0x91 Optional + * case SCSI_CMD_LOCKUNLOCKACACHE: * 0x92 Optional + * case SCSI_CMD_WRITESAME16: * 0x93 Optional + * case SCSI_CMD_READCAPACITY16: * 0x9e Optional + * case SCSI_CMD_READLONG16: * 0x9e Optional + * case SCSI_CMD_WRITELONG16 * 0x9f Optional + * case SCSI_CMD_REPORTLUNS: * 0xa0 Mandatory, but not implemented + * case SCSI_CMD_MAINTENANCEIN: * 0xa3 Optional (SCCS==0) + * case SCSI_CMD_MAINTENANCEOUT: * 0xa4 Optional (SCCS==0) + * case SCSI_CMD_MOVEMEDIUM: * 0xa5 ? + * case SCSI_CMD_MOVEMEDIUMATTACHED: * 0xa7 Optional (MCHNGR==0) */ + + case SCSI_CMD_READ12: /* 0xa8 Optional */ + ret = usbmsc_cmdread12(priv); + break; + + case SCSI_CMD_WRITE12: /* 0xaa Optional */ + ret = usbmsc_cmdwrite12(priv); + break; + + /* case SCSI_CMD_READMEDIASERIALNUMBER: * 0xab Optional + * case SCSI_CMD_WRITEANDVERIFY12: * 0xae Optional + * case SCSI_CMD_VERIFY12: * 0xaf Optional + * case SCSI_CMD_SETLIMITS12 * 0xb3 Obsolete + * case SCSI_CMD_READELEMENTSTATUS: * 0xb4 Optional (MCHNGR==0) + * case SCSI_CMD_READDEFECTDATA12: * 0xb7 Optional + * case SCSI_CMD_REDUNDANCYGROUPIN: * 0xba Optional + * case SCSI_CMD_REDUNDANCYGROUPOUT: * 0xbb Optional + * case SCSI_CMD_SPAREIN: * 0xbc Optional (SCCS==0) + * case SCSI_CMD_SPAREOUT: * 0xbd Optional (SCCS==0) + * case SCSI_CMD_VOLUMESETIN: * 0xbe Optional (SCCS==0) + * case SCSI_CMD_VOLUMESETOUT: * 0xbe Optional (SCCS==0) + * * 0xc0-0xff Vendor specific */ + + default: + priv->u.alloclen = 0; + if (ret == OK) + { + priv->lun->sd = SCSI_KCQIR_INVALIDCOMMAND; + ret = -EINVAL; + } + break; + } + pthread_mutex_unlock(&priv->mutex); + + /* Is a response required? (Not for read6/10/12 and write6/10/12). */ + + if (priv->thstate == USBMSC_STATE_CMDPARSE) + { + /* All commands come through this path (EXCEPT read6/10/12 and write6/10/12). + * For all other commands, the following setup is expected for the response + * based on data direction: + * + * For direction NONE: + * 1. priv->u.alloclen == 0 + * 2. priv->nreqbytes == 0 + * + * For direction = device-to-host: + * 1. priv->u.alloclen == allocation length; space set aside by the + * host to receive the device data. The size of the response + * cannot exceed this value. + * 2. response data is in the request currently at the head of + * the priv->wrreqlist queue. priv->nreqbytes is set to the length + * of data in the response. + * + * For direction host-to-device + * At present, there are no supported commands that should have host-to-device + * transfers (except write6/10/12 and that command logic does not take this + * path. The 'residue' is left at the full host-to-device data size. + * + * For all: + * ret set to <0 if an error occurred in parsing the commands. + */ + + /* For from device-to-hose operations, the residue is the expected size + * (the initial value of 'residue') minus the amount actually returned + * in the response: + */ + + if (priv->cbwdir == USBMSC_FLAGS_DIRDEVICE2HOST) + { + /* The number of bytes in the response cannot exceed the host + * 'allocation length' in the command. + */ + + if (priv->nreqbytes > priv->u.alloclen) + { + priv->nreqbytes = priv->u.alloclen; + } + + /* The residue is then the number of bytes that were not sent */ + + priv->residue -= priv->nreqbytes; + } + + /* On return, we need the following: + * + * 1. Setup for CMDFINISH state if appropriate + * 2. priv->thstate set to either CMDPARSE if no buffer was available or + * CMDFINISH to send the response + * 3. Return OK to continue; <0 to wait for the next event + */ + + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDPARSECMDFINISH), priv->cdb[0]); + priv->thstate = USBMSC_STATE_CMDFINISH; + ret = OK; + } + return ret; +} + +/**************************************************************************** + * Name: usbmsc_cmdreadstate + * + * Description: + * Called from the worker thread in the USBMSC_STATE_CMDREAD state. + * The USBMSC_STATE_CMDREAD state is entered when usbmsc_cmdparsestate + * obtains a valid SCSI read command. This state is really a continuation + * of the USBMSC_STATE_CMDPARSE state that handles extended SCSI read + * command handling. + * + * Returned value: + * If no USBDEV write request is available or certain other errors occur, this + * function returns a negated errno and stays in the USBMSC_STATE_CMDREAD + * state. Otherwise, when the new SCSI read command is fully processed, + * this function sets priv->thstate to USBMSC_STATE_CMDFINISH and returns OK. + * + * State variables: + * xfrlen - holds the number of sectors read to be read. + * sector - holds the sector number of the next sector to be read + * nsectbytes - holds the number of bytes buffered for the current sector + * nreqbytes - holds the number of bytes currently buffered in the request + * at the head of the wrreqlist. + * + ****************************************************************************/ + +static int usbmsc_cmdreadstate(FAR struct usbmsc_dev_s *priv) +{ + FAR struct usbmsc_lun_s *lun = priv->lun; + FAR struct usbmsc_req_s *privreq; + FAR struct usbdev_req_s *req; + irqstate_t flags; + ssize_t nread; + uint8_t *src; + uint8_t *dest; + int nbytes; + int ret; + + /* Loop transferring data until either (1) all of the data has been + * transferred, or (2) we have used up all of the write requests that we have + * available. + */ + + while (priv->u.xfrlen > 0 || priv->nsectbytes > 0) + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDREAD), priv->u.xfrlen); + + /* Is the I/O buffer empty? */ + + if (priv->nsectbytes <= 0) + { + /* Yes.. read the next sector */ + + nread = USBMSC_DRVR_READ(lun, priv->iobuffer, priv->sector, 1); + if (nread < 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDREADREADFAIL), -nread); + lun->sd = SCSI_KCQME_UNRRE1; + lun->sdinfo = priv->sector; + break; + } + + priv->nsectbytes = lun->sectorsize; + priv->u.xfrlen--; + priv->sector++; + } + + /* Check if there is a request in the wrreqlist that we will be able to + * use for data transfer. + */ + + privreq = (FAR struct usbmsc_req_s *)sq_peek(&priv->wrreqlist); + + /* If there no request structures available, then just return an error. + * This will cause us to remain in the CMDREAD state. When a request is + * returned, the worker thread will be awakened in the USBMSC_STATE_CMDREAD + * and we will be called again. + */ + + if (!privreq) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDREADWRRQEMPTY), 0); + priv->nreqbytes = 0; + return -ENOMEM; + } + req = privreq->req; + + /* Transfer all of the data that will (1) fit into the request buffer, OR (2) + * all of the data available in the sector buffer. + */ + + src = &priv->iobuffer[lun->sectorsize - priv->nsectbytes]; + dest = &req->buf[priv->nreqbytes]; + + nbytes = MIN(CONFIG_USBMSC_BULKINREQLEN - priv->nreqbytes, priv->nsectbytes); + + /* Copy the data from the sector buffer to the USB request and update counts */ + + memcpy(dest, src, nbytes); + priv->nreqbytes += nbytes; + priv->nsectbytes -= nbytes; + + /* If (1) the request buffer is full OR (2) this is the final request full of data, + * then submit the request + */ + + if (priv->nreqbytes >= CONFIG_USBMSC_BULKINREQLEN || + (priv->u.xfrlen <= 0 && priv->nsectbytes <= 0)) + { + /* Remove the request that we just filled from wrreqlist (we've already checked + * that is it not NULL + */ + + flags = irqsave(); + privreq = (FAR struct usbmsc_req_s *)sq_remfirst(&priv->wrreqlist); + irqrestore(flags); + + /* And submit the request to the bulk IN endpoint */ + + req->len = priv->nreqbytes; + req->priv = privreq; + req->callback = usbmsc_wrcomplete; + req->flags = 0; + + ret = EP_SUBMIT(priv->epbulkin, req); + if (ret != OK) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDREADSUBMIT), (uint16_t)-ret); + lun->sd = SCSI_KCQME_UNRRE1; + lun->sdinfo = priv->sector; + break; + } + + /* Assume success... residue should probably really be decremented in + * wrcomplete when we know that the transfer completed successfully. + */ + + priv->residue -= priv->nreqbytes; + priv->nreqbytes = 0; + } + } + + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDREADCMDFINISH), priv->u.xfrlen); + priv->thstate = USBMSC_STATE_CMDFINISH; + return OK; +} + +/**************************************************************************** + * Name: usbmsc_cmdwritestate + * + * Description: + * Called from the worker thread in the USBMSC_STATE_CMDWRITE state. + * The USBMSC_STATE_CMDWRITE state is entered when usbmsc_cmdparsestate + * obtains a valid SCSI write command. This state is really a continuation + * of the USBMSC_STATE_CMDPARSE state that handles extended SCSI write + * command handling. + * + * Returned value: + * If no USBDEV write request is available or certain other errors occur, this + * function returns a negated errno and stays in the USBMSC_STATE_CMDWRITE + * state. Otherwise, when the new SCSI write command is fully processed, + * this function sets priv->thstate to USBMSC_STATE_CMDFINISH and returns OK. + * + * State variables: + * xfrlen - holds the number of sectors read to be written. + * sector - holds the sector number of the next sector to write + * nsectbytes - holds the number of bytes buffered for the current sector + * nreqbytes - holds the number of untransferred bytes currently in the + * request at the head of the rdreqlist. + * + ****************************************************************************/ + +static int usbmsc_cmdwritestate(FAR struct usbmsc_dev_s *priv) +{ + FAR struct usbmsc_lun_s *lun = priv->lun; + FAR struct usbmsc_req_s *privreq; + FAR struct usbdev_req_s *req; + ssize_t nwritten; + uint16_t xfrd; + uint8_t *src; + uint8_t *dest; + int nbytes; + int ret; + + /* Loop transferring data until either (1) all of the data has been + * transferred, or (2) we have written all of the data in the available + * read requests. + */ + + while (priv->u.xfrlen > 0) + { + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDWRITE), priv->u.xfrlen); + + /* Check if there is a request in the rdreqlist containing additional + * data to be written. + */ + + privreq = (FAR struct usbmsc_req_s *)sq_remfirst(&priv->rdreqlist); + + /* If there no request data available, then just return an error. + * This will cause us to remain in the CMDWRITE state. When a filled request is + * received, the worker thread will be awakened in the USBMSC_STATE_CMDWRITE + * and we will be called again. + */ + + if (!privreq) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDWRITERDRQEMPTY), 0); + priv->nreqbytes = 0; + return -ENOMEM; + } + + req = privreq->req; + xfrd = req->xfrd; + priv->nreqbytes = xfrd; + + /* Now loop until all of the data in the read request has been tranferred + * to the block driver OR all of the request data has been transferred. + */ + + while (priv->nreqbytes > 0 && priv->u.xfrlen > 0) + { + /* Copy the data received in the read request into the sector I/O buffer */ + + src = &req->buf[xfrd - priv->nreqbytes]; + dest = &priv->iobuffer[priv->nsectbytes]; + + nbytes = MIN(lun->sectorsize - priv->nsectbytes, priv->nreqbytes); + + /* Copy the data from the sector buffer to the USB request and update counts */ + + memcpy(dest, src, nbytes); + priv->nsectbytes += nbytes; + priv->nreqbytes -= nbytes; + + /* Is the I/O buffer full? */ + + if (priv->nsectbytes >= lun->sectorsize) + { + /* Yes.. Write the next sector */ + + nwritten = USBMSC_DRVR_WRITE(lun, priv->iobuffer, priv->sector, 1); + if (nwritten < 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDWRITEWRITEFAIL), -nwritten); + lun->sd = SCSI_KCQME_WRITEFAULTAUTOREALLOCFAILED; + lun->sdinfo = priv->sector; + goto errout; + } + + priv->nsectbytes = 0; + priv->residue -= lun->sectorsize; + priv->u.xfrlen--; + priv->sector++; + } + } + + /* In either case, we are finished with this read request and can return it + * to the endpoint. Then we will go back to the top of the top and attempt + * to get the next read request. + */ + + req->len = CONFIG_USBMSC_BULKOUTREQLEN; + req->priv = privreq; + req->callback = usbmsc_rdcomplete; + + ret = EP_SUBMIT(priv->epbulkout, req); + if (ret != OK) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDWRITERDSUBMIT), (uint16_t)-ret); + } + + /* Did the host decide to stop early? */ + + if (xfrd != CONFIG_USBMSC_BULKOUTREQLEN) + { + priv->shortpacket = 1; + goto errout; + } + } + +errout: + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDWRITECMDFINISH), priv->u.xfrlen); + priv->thstate = USBMSC_STATE_CMDFINISH; + return OK; +} + +/**************************************************************************** + * Name: usbmsc_cmdfinishstate + * + * Description: + * Called from the worker thread in the USBMSC_STATE_CMDFINISH state. + * The USBMSC_STATE_CMDFINISH state is entered when processing of a + * command has finished but before status has been returned. + * + * Returned value: + * If no USBDEV write request is available or certain other errors occur, this + * function returns a negated errno and stays in the USBMSC_STATE_CMDFINISH + * state. Otherwise, when the command is fully processed, this function + * sets priv->thstate to USBMSC_STATE_CMDSTATUS and returns OK. + * + ****************************************************************************/ + +static int usbmsc_cmdfinishstate(FAR struct usbmsc_dev_s *priv) +{ + FAR struct usbmsc_req_s *privreq; + irqstate_t flags; + int ret = OK; + + /* Check if there is a request in the wrreqlist that we will be able to + * use for data transfer. + */ + + privreq = (FAR struct usbmsc_req_s *)sq_peek(&priv->wrreqlist); + + /* If there no request structures available, then just return an error. + * This will cause us to remain in the CMDREAD state. When a request is + * returned, the worker thread will be awakened in the USBMSC_STATE_CMDREAD + * and we will be called again. + */ + + if (!privreq) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDFINISHRQEMPTY), 0); + return -ENOMEM; + } + + /* Finish the final stages of the reply */ + + switch (priv->cbwdir) + { + /* Device-to-host: All but the last data buffer has been sent */ + + case USBMSC_FLAGS_DIRDEVICE2HOST: + if (priv->cbwlen > 0) + { + /* On most commands (the exception is outgoing, write commands), + * the data has not not yet been sent. + */ + + if (priv->nreqbytes > 0) + { + struct usbdev_req_s *req; + + /* Take a request from the wrreqlist (we've already checked + * that is it not NULL) + */ + + flags = irqsave(); + privreq = (FAR struct usbmsc_req_s *)sq_remfirst(&priv->wrreqlist); + irqrestore(flags); + + /* Send the write request */ + + req = privreq->req; + req->len = priv->nreqbytes; + req->callback = usbmsc_wrcomplete; + req->priv = privreq; + req->flags = USBDEV_REQFLAGS_NULLPKT; + + ret = EP_SUBMIT(priv->epbulkin, privreq->req); + if (ret < 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDFINISHSUBMIT), (uint16_t)-ret); + } + } + + /* Stall the BULK In endpoint if there is a residue */ + + if (priv->residue > 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDFINISHRESIDUE), (uint16_t)priv->residue); + +#ifdef CONFIG_USBMSC_RACEWAR + /* (See description of the workaround at the top of the file). + * First, wait for the transfer to complete, then stall the endpoint + */ + + usleep (100000); + (void)EP_STALL(priv->epbulkin); + + /* now wait for stall to go away .... */ + + usleep (100000); +#else + (void)EP_STALL(priv->epbulkin); +#endif + } + } + break; + + /* Host-to-device: We have processed all we want of the host data. */ + + case USBMSC_FLAGS_DIRHOST2DEVICE: + if (priv->residue > 0) + { + /* Did the host stop sending unexpectedly early? */ + + flags = irqsave(); + if (priv->shortpacket) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDFINISHSHORTPKT), (uint16_t)priv->residue); + } + + /* Unprocessed incoming data: STALL and cancel requests. */ + + else + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDFINSHSUBMIT), (uint16_t)priv->residue); + EP_STALL(priv->epbulkout); + } + + priv->theventset |= USBMSC_EVENT_ABORTBULKOUT; + irqrestore(flags); + } + break; + + default: + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDFINSHDIR), priv->cbwdir); + case USBMSC_FLAGS_DIRNONE: /* Nothing to send */ + break; + } + + /* Return to the IDLE state */ + + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDFINISHCMDSTATUS), 0); + priv->thstate = USBMSC_STATE_CMDSTATUS; + return OK; +} + +/**************************************************************************** + * Name: usbmsc_cmdstatusstate + * + * Description: + * Called from the worker thread in the USBMSC_STATE_CMDSTATUS state. + * That state is after a CBW has been fully processed. This function sends + * the concluding CSW. + * + * Returned value: + * If no write request is available or certain other errors occur, this + * function returns a negated errno and stays in the USBMSC_STATE_CMDSTATUS + * state. Otherwise, when the SCSI statis is successfully returned, this + * function sets priv->thstate to USBMSC_STATE_IDLE and returns OK. + * + ****************************************************************************/ + +static int usbmsc_cmdstatusstate(FAR struct usbmsc_dev_s *priv) +{ + FAR struct usbmsc_lun_s *lun = priv->lun; + FAR struct usbmsc_req_s *privreq; + FAR struct usbdev_req_s *req; + FAR struct usbmsc_csw_s *csw; + irqstate_t flags; + uint32_t sd; + uint8_t status = USBMSC_CSWSTATUS_PASS; + int ret; + + /* Take a request from the wrreqlist */ + + flags = irqsave(); + privreq = (FAR struct usbmsc_req_s *)sq_remfirst(&priv->wrreqlist); + irqrestore(flags); + + /* If there no request structures available, then just return an error. + * This will cause us to remain in the CMDSTATUS status. When a request is + * returned, the worker thread will be awakened in the USBMSC_STATE_CMDSTATUS + * and we will be called again. + */ + + if (!privreq) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CMDSTATUSRDREQLISTEMPTY), 0); + return -ENOMEM; + } + + req = privreq->req; + csw = (struct usbmsc_csw_s*)req->buf; + + /* Extract the sense data from the LUN structure */ + + if (lun) + { + sd = lun->sd; + } + else + { + sd = SCSI_KCQIR_INVALIDLUN; + } + + /* Determine the CSW status: PASS, PHASEERROR, or FAIL */ + + if (priv->phaseerror) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SNDPHERROR), 0); + status = USBMSC_CSWSTATUS_PHASEERROR; + sd = SCSI_KCQIR_INVALIDCOMMAND; + } + else if (sd != SCSI_KCQ_NOSENSE) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SNDCSWFAIL), 0); + status = USBMSC_CSWSTATUS_FAIL; + } + + /* Format and submit the CSW */ + + csw->signature[0] = 'U'; + csw->signature[1] = 'S'; + csw->signature[2] = 'B'; + csw->signature[3] = 'S'; + usbmsc_putle32(csw->tag, priv->cbwtag); + usbmsc_putle32(csw->residue, priv->residue); + csw->status = status; + + usbmsc_dumpdata("SCSCI CSW", (uint8_t*)csw, USBMSC_CSW_SIZEOF); + + req->len = USBMSC_CSW_SIZEOF; + req->callback = usbmsc_wrcomplete; + req->priv = privreq; + req->flags = USBDEV_REQFLAGS_NULLPKT; + + ret = EP_SUBMIT(priv->epbulkin, req); + if (ret < 0) + { + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SNDSTATUSSUBMIT), (uint16_t)-ret); + flags = irqsave(); + (void)sq_addlast((sq_entry_t*)privreq, &priv->wrreqlist); + irqrestore(flags); + } + + /* Return to the IDLE state */ + + usbtrace(TRACE_CLASSSTATE(USBMSC_CLASSSTATE_CMDSTATUSIDLE), 0); + priv->thstate = USBMSC_STATE_IDLE; + return OK; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: usbmsc_workerthread + * + * Description: + * This is the main function of the USB storage worker thread. It loops + * until USB-related events occur, then processes those events accordingly + * + ****************************************************************************/ + +void *usbmsc_workerthread(void *arg) +{ + struct usbmsc_dev_s *priv = (struct usbmsc_dev_s *)arg; + irqstate_t flags; + uint16_t eventset; + int ret; + + /* This thread is started before the USB storage class is fully initialized. + * wait here until we are told to begin. Start in the NOTINITIALIZED state + */ + + pthread_mutex_lock(&priv->mutex); + priv->thstate = USBMSC_STATE_STARTED; + while ((priv->theventset & USBMSC_EVENT_READY) != 0 && + (priv->theventset & USBMSC_EVENT_TERMINATEREQUEST) != 0) + { + pthread_cond_wait(&priv->cond, &priv->mutex); + } + + /* Transition to the INITIALIZED/IDLE state */ + + priv->thstate = USBMSC_STATE_IDLE; + eventset = priv->theventset; + priv->theventset = USBMSC_EVENT_NOEVENTS; + pthread_mutex_unlock(&priv->mutex); + + /* Then loop until we are asked to terminate */ + + while ((eventset & USBMSC_EVENT_TERMINATEREQUEST) == 0) + { + /* Wait for some interesting event. Note that we must both take the + * lock (to eliminate race conditions with other threads) and disable + * interrupts (to eliminate race conditions with USB interrupt handling. + */ + + pthread_mutex_lock(&priv->mutex); + flags = irqsave(); + if (priv->theventset == USBMSC_EVENT_NOEVENTS) + { + pthread_cond_wait(&priv->cond, &priv->mutex); + } + + /* Sample any events before re-enabling interrupts. Any events that + * occur after re-enabling interrupts will have to be handled in the + * next time through the loop. + */ + + eventset = priv->theventset; + priv->theventset = USBMSC_EVENT_NOEVENTS; + pthread_mutex_unlock(&priv->mutex); + + /* Were we awakened by some event that requires immediate action? + * + * - The USBMSC_EVENT_DISCONNECT is signalled from the disconnect method + * after all transfers have been stopped, when the host is disconnected. + * + * - The CUSBMSC_EVENT_RESET is signalled when the bulk-storage-specific + * USBMSC_REQ_MSRESET EP0 setup received. We must stop the current + * operation and reinialize state. + * + * - The USBMSC_EVENT_CFGCHANGE is signaled when the EP0 setup logic + * receives a valid USB_REQ_SETCONFIGURATION request + * + * - The USBMSC_EVENT_IFCHANGE is signaled when the EP0 setup logic + * receives a valid USB_REQ_SETINTERFACE request + * + * - The USBMSC_EVENT_ABORTBULKOUT event is signalled by the CMDFINISH + * logic when there is a residue after processing a host-to-device + * transfer. We need to discard all incoming request. + * + * All other events are just wakeup calls and are intended only + * drive the state machine. + */ + + if ((eventset & (USBMSC_EVENT_DISCONNECT|USBMSC_EVENT_RESET|USBMSC_EVENT_CFGCHANGE| + USBMSC_EVENT_IFCHANGE|USBMSC_EVENT_ABORTBULKOUT)) != 0) + { + /* These events require that the current configuration be reset */ + + if ((eventset & USBMSC_EVENT_IFCHANGE) != 0) + { + usbmsc_resetconfig(priv); + } + + /* These events require that a new configuration be established */ + + if ((eventset & (USBMSC_EVENT_CFGCHANGE|USBMSC_EVENT_IFCHANGE)) != 0) + { + usbmsc_setconfig(priv, priv->thvalue); + } + + /* These events required that we send a deferred EP0 setup response */ + + if ((eventset & (USBMSC_EVENT_RESET|USBMSC_EVENT_CFGCHANGE|USBMSC_EVENT_IFCHANGE)) != 0) + { + usbmsc_deferredresponse(priv, false); + } + + /* For all of these events... terminate any transactions in progress */ + + priv->thstate = USBMSC_STATE_IDLE; + } + irqrestore(flags); + + /* Loop processing each SCSI command state. Each state handling + * function will do the following: + * + * - If it must block for an event, it will return a negated errno value + * - If it completes the processing for that state, it will (1) set + * the next appropriate state value and (2) return OK. + * + * So the following will loop until we must block for an event in + * a particular state. When we are awakened by an event (above) we + * will resume processing in the same state. + */ + + do + { + switch (priv->thstate) + { + case USBMSC_STATE_IDLE: /* Started and waiting for commands */ + ret = usbmsc_idlestate(priv); + break; + + case USBMSC_STATE_CMDPARSE: /* Parsing the received a command */ + ret = usbmsc_cmdparsestate(priv); + break; + + case USBMSC_STATE_CMDREAD: /* Continuing to process a SCSI read command */ + ret = usbmsc_cmdreadstate(priv); + break; + + case USBMSC_STATE_CMDWRITE: /* Continuing to process a SCSI write command */ + ret = usbmsc_cmdwritestate(priv); + break; + + case USBMSC_STATE_CMDFINISH: /* Finish command processing */ + ret = usbmsc_cmdfinishstate(priv); + break; + + case USBMSC_STATE_CMDSTATUS: /* Processing the status phase of a command */ + ret = usbmsc_cmdstatusstate(priv); + break; + + case USBMSC_STATE_NOTSTARTED: /* Thread has not yet been started */ + case USBMSC_STATE_STARTED: /* Started, but is not yet initialized */ + case USBMSC_STATE_TERMINATED: /* Thread has exitted */ + default: + usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_INVALIDSTATE), priv->thstate); + priv->thstate = USBMSC_STATE_IDLE; + ret = OK; + break; + } + } + while (ret == OK); + } + + /* Transition to the TERMINATED state and exit */ + + priv->thstate = USBMSC_STATE_TERMINATED; + return NULL; +} |