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rockbox/firmware/usbstack/usb_storage.c
Frank Gevaerts ecde125fa7 Sending an empty data block before sending the FAIL CSW seems to make Windows happier if a device is not present (e.g. an empty sd card slot) (fix proposed by Martin Ritter) 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16750 a1c6a512-1295-4272-9138-f99709370657
2008-03-22 21:21:37 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: $
*
* Copyright (C) 2007 by Björn Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "string.h"
#include "system.h"
#include "usb_core.h"
#include "usb_drv.h"
//#define LOGF_ENABLE
#include "logf.h"
#include "ata.h"
#include "hotswap.h"
#include "disk.h"
/* Needed to get at the audio buffer */
#include "audio.h"
#ifdef USB_STORAGE
/* Enable the following define to export only the SD card slot. This
* is useful for USBCV MSC tests, as those are destructive.
* This won't work right if the device doesn't have a card slot.
*/
//#define ONLY_EXPOSE_CARD_SLOT
#define SECTOR_SIZE 512
/* We can currently use up to 20k buffer size. More than that requires
* transfer chaining in the driver. Tests on sansa c200 show that the 16k
* limitation causes no more than 2% slowdown.
*/
#define BUFFER_SIZE 16384
/* bulk-only class specific requests */
#define USB_BULK_RESET_REQUEST 0xff
#define USB_BULK_GET_MAX_LUN 0xfe
#define DIRECT_ACCESS_DEVICE 0x00 /* disks */
#define DEVICE_REMOVABLE 0x80
#define CBW_SIGNATURE 0x43425355
#define CSW_SIGNATURE 0x53425355
#define SCSI_TEST_UNIT_READY 0x00
#define SCSI_INQUIRY 0x12
#define SCSI_MODE_SENSE_6 0x1a
#define SCSI_MODE_SENSE_10 0x5a
#define SCSI_REQUEST_SENSE 0x03
#define SCSI_ALLOW_MEDIUM_REMOVAL 0x1e
#define SCSI_READ_CAPACITY 0x25
#define SCSI_READ_FORMAT_CAPACITY 0x23
#define SCSI_READ_10 0x28
#define SCSI_WRITE_10 0x2a
#define SCSI_START_STOP_UNIT 0x1b
#define SCSI_REPORT_LUNS 0xa0
#define UMS_STATUS_GOOD 0x00
#define UMS_STATUS_FAIL 0x01
#define SENSE_NOT_READY 0x02
#define SENSE_MEDIUM_ERROR 0x03
#define SENSE_ILLEGAL_REQUEST 0x05
#define SENSE_UNIT_ATTENTION 0x06
#define ASC_MEDIUM_NOT_PRESENT 0x3a
#define ASC_INVALID_FIELD_IN_CBD 0x24
#define ASC_LBA_OUT_OF_RANGE 0x21
#define ASC_WRITE_ERROR 0x0C
#define ASC_READ_ERROR 0x11
#define ASC_NOT_READY 0x04
#define ASCQ_BECOMING_READY 0x01
#define SCSI_FORMAT_CAPACITY_FORMATTED_MEDIA 0x02000000
/* storage interface */
#define USB_SC_SCSI 0x06 /* Transparent */
#define USB_PROT_BULK 0x50 /* bulk only */
static struct usb_interface_descriptor __attribute__((aligned(2)))
interface_descriptor =
{
.bLength = sizeof(struct usb_interface_descriptor),
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
.bInterfaceSubClass = USB_SC_SCSI,
.bInterfaceProtocol = USB_PROT_BULK,
.iInterface = 0
};
static struct usb_endpoint_descriptor __attribute__((aligned(2)))
endpoint_descriptor =
{
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 0,
.bInterval = 0
};
struct inquiry_data {
unsigned char DeviceType;
unsigned char DeviceTypeModifier;
unsigned char Versions;
unsigned char Format;
unsigned char AdditionalLength;
unsigned char Reserved[2];
unsigned char Capability;
unsigned char VendorId[8];
unsigned char ProductId[16];
unsigned char ProductRevisionLevel[4];
} __attribute__ ((packed));
struct report_lun_data {
unsigned int lun_list_length;
unsigned int reserved1;
unsigned char lun0[8];
#ifdef HAVE_HOTSWAP
unsigned char lun1[8];
#endif
} __attribute__ ((packed));
struct sense_data {
unsigned char ResponseCode;
unsigned char Obsolete;
unsigned char fei_sensekey;
unsigned int Information;
unsigned char AdditionalSenseLength;
unsigned int CommandSpecificInformation;
unsigned char AdditionalSenseCode;
unsigned char AdditionalSenseCodeQualifier;
unsigned char FieldReplaceableUnitCode;
unsigned char SKSV;
unsigned short SenseKeySpecific;
} __attribute__ ((packed));
struct mode_sense_bdesc_longlba {
unsigned char num_blocks[8];
unsigned char reserved[4];
unsigned char block_size[4];
} __attribute__ ((packed));
struct mode_sense_bdesc_shortlba {
unsigned char density_code;
unsigned char num_blocks[3];
unsigned char reserved;
unsigned char block_size[3];
} __attribute__ ((packed));
struct mode_sense_data_10 {
unsigned short mode_data_length;
unsigned char medium_type;
unsigned char device_specific;
unsigned char longlba;
unsigned char reserved;
unsigned short block_descriptor_length;
struct mode_sense_bdesc_longlba block_descriptor;
} __attribute__ ((packed));
struct mode_sense_data_6 {
unsigned char mode_data_length;
unsigned char medium_type;
unsigned char device_specific;
unsigned char block_descriptor_length;
struct mode_sense_bdesc_shortlba block_descriptor;
} __attribute__ ((packed));
struct command_block_wrapper {
unsigned int signature;
unsigned int tag;
unsigned int data_transfer_length;
unsigned char flags;
unsigned char lun;
unsigned char command_length;
unsigned char command_block[16];
} __attribute__ ((packed));
struct command_status_wrapper {
unsigned int signature;
unsigned int tag;
unsigned int data_residue;
unsigned char status;
} __attribute__ ((packed));
struct capacity {
unsigned int block_count;
unsigned int block_size;
} __attribute__ ((packed));
struct format_capacity {
unsigned int following_length;
unsigned int block_count;
unsigned int block_size;
} __attribute__ ((packed));
static union {
unsigned char* transfer_buffer;
struct inquiry_data* inquiry;
struct capacity* capacity_data;
struct format_capacity* format_capacity_data;
struct sense_data *sense_data;
struct mode_sense_data_6 *ms_data_6;
struct mode_sense_data_10 *ms_data_10;
struct report_lun_data *lun_data;
struct command_status_wrapper* csw;
char *max_lun;
} tb;
static struct {
unsigned int sector;
unsigned int count;
unsigned int tag;
unsigned int lun;
unsigned char *data[2];
unsigned char data_select;
unsigned int last_result;
} cur_cmd;
static struct {
unsigned char sense_key;
unsigned char information;
unsigned char asc;
unsigned char ascq;
} cur_sense_data;
static void handle_scsi(struct command_block_wrapper* cbw);
static void send_csw(int status);
static void send_command_result(void *data,int size);
static void send_block_data(void *data,int size);
static void receive_block_data(void *data,int size);
static void identify2inquiry(int lun);
static void send_and_read_next(void);
static bool ejected[NUM_VOLUMES];
static int usb_endpoint;
static int usb_interface;
static enum {
WAITING_FOR_COMMAND,
SENDING_BLOCKS,
SENDING_RESULT,
RECEIVING_BLOCKS,
SENDING_CSW
} state = WAITING_FOR_COMMAND;
static bool check_disk_present(IF_MV_NONVOID(int volume))
{
unsigned char sector[512];
return ata_read_sectors(IF_MV2(volume,)0,1,sector) == 0;
}
static void try_release_ata(void)
{
/* Check if there is a connected drive left. If not,
release excusive access */
bool canrelease=true;
int i;
for(i=0;i<NUM_VOLUMES;i++) {
if(ejected[i]==false){
canrelease=false;
break;
}
}
if(canrelease) {
logf("scsi release ata");
usb_release_exclusive_ata();
}
}
#ifdef HAVE_HOTSWAP
void usb_storage_notify_hotswap(int volume,bool inserted)
{
logf("notify %d",inserted);
if(inserted && check_disk_present(IF_MV(volume))) {
ejected[volume] = false;
}
else {
ejected[volume] = true;
try_release_ata();
}
}
#endif
void usb_storage_reconnect(void)
{
int i;
for(i=0;i<NUM_VOLUMES;i++)
ejected[i] = !check_disk_present(IF_MV(i));
usb_request_exclusive_ata();
}
/* called by usb_code_init() */
void usb_storage_init(void)
{
int i;
for(i=0;i<NUM_VOLUMES;i++) {
ejected[i] = !check_disk_present(IF_MV(i));
}
logf("usb_storage_init done");
}
int usb_storage_get_config_descriptor(unsigned char *dest,int max_packet_size,
int interface_number,int endpoint)
{
endpoint_descriptor.wMaxPacketSize=max_packet_size;
interface_descriptor.bInterfaceNumber=interface_number;
memcpy(dest,&interface_descriptor,
sizeof(struct usb_interface_descriptor));
dest+=sizeof(struct usb_interface_descriptor);
endpoint_descriptor.bEndpointAddress = endpoint | USB_DIR_IN,
memcpy(dest,&endpoint_descriptor,
sizeof(struct usb_endpoint_descriptor));
dest+=sizeof(struct usb_endpoint_descriptor);
endpoint_descriptor.bEndpointAddress = endpoint | USB_DIR_OUT,
memcpy(dest,&endpoint_descriptor,
sizeof(struct usb_endpoint_descriptor));
return sizeof(struct usb_interface_descriptor) +
2*sizeof(struct usb_endpoint_descriptor);
}
void usb_storage_init_connection(int interface,int endpoint)
{
size_t bufsize;
unsigned char * audio_buffer;
usb_interface = interface;
usb_endpoint = endpoint;
logf("ums: set config");
/* prime rx endpoint. We only need room for commands */
state = WAITING_FOR_COMMAND;
/* TODO : check if bufsize is at least 32K ? */
audio_buffer = audio_get_buffer(false,&bufsize);
tb.transfer_buffer =
(void *)UNCACHED_ADDR((unsigned int)(audio_buffer + 31) & 0xffffffe0);
usb_drv_recv(usb_endpoint, tb.transfer_buffer, 1024);
}
/* called by usb_core_transfer_complete() */
void usb_storage_transfer_complete(bool in,int status,int length)
{
struct command_block_wrapper* cbw = (void*)tb.transfer_buffer;
//logf("transfer result %X %d", status, length);
switch(state) {
case RECEIVING_BLOCKS:
if(in==true) {
logf("IN received in RECEIVING");
}
logf("scsi write %d %d", cur_cmd.sector, cur_cmd.count);
if(status==0) {
if((unsigned int)length!=(SECTOR_SIZE*cur_cmd.count)
&& (unsigned int)length!=BUFFER_SIZE) {
logf("unexpected length :%d",length);
}
unsigned int next_sector = cur_cmd.sector +
(BUFFER_SIZE/SECTOR_SIZE);
unsigned int next_count = cur_cmd.count -
MIN(cur_cmd.count,BUFFER_SIZE/SECTOR_SIZE);
if(next_count!=0) {
/* Ask the host to send more, to the other buffer */
receive_block_data(cur_cmd.data[!cur_cmd.data_select],
MIN(BUFFER_SIZE,next_count*SECTOR_SIZE));
}
/* Now write the data that just came in, while the host is
sending the next bit */
int result = ata_write_sectors(IF_MV2(cur_cmd.lun,)
cur_cmd.sector,
MIN(BUFFER_SIZE/SECTOR_SIZE,
cur_cmd.count),
cur_cmd.data[cur_cmd.data_select]);
if(result != 0) {
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_MEDIUM_ERROR;
cur_sense_data.asc=ASC_WRITE_ERROR;
cur_sense_data.ascq=0;
break;
}
if(next_count==0) {
send_csw(UMS_STATUS_GOOD);
}
/* Switch buffers for the next one */
cur_cmd.data_select=!cur_cmd.data_select;
cur_cmd.sector = next_sector;
cur_cmd.count = next_count;
}
else {
logf("Transfer failed %X",status);
send_csw(UMS_STATUS_FAIL);
/* TODO fill in cur_sense_data */
cur_sense_data.sense_key=0;
cur_sense_data.information=0;
cur_sense_data.asc=0;
cur_sense_data.ascq=0;
}
break;
case WAITING_FOR_COMMAND:
if(in==true) {
logf("IN received in WAITING_FOR_COMMAND");
}
//logf("command received");
if(letoh32(cbw->signature) == CBW_SIGNATURE){
handle_scsi(cbw);
}
else {
usb_drv_stall(usb_endpoint, true,true);
usb_drv_stall(usb_endpoint, true,false);
}
break;
case SENDING_CSW:
if(in==false) {
logf("OUT received in SENDING_CSW");
}
//logf("csw sent, now go back to idle");
state = WAITING_FOR_COMMAND;
usb_drv_recv(usb_endpoint, tb.transfer_buffer, 1024);
break;
case SENDING_RESULT:
if(in==false) {
logf("OUT received in SENDING");
}
if(status==0) {
//logf("data sent, now send csw");
send_csw(UMS_STATUS_GOOD);
}
else {
logf("Transfer failed %X",status);
send_csw(UMS_STATUS_FAIL);
/* TODO fill in cur_sense_data */
cur_sense_data.sense_key=0;
cur_sense_data.information=0;
cur_sense_data.asc=0;
cur_sense_data.ascq=0;
}
break;
case SENDING_BLOCKS:
if(in==false) {
logf("OUT received in SENDING");
}
if(status==0) {
if(cur_cmd.count==0) {
//logf("data sent, now send csw");
send_csw(UMS_STATUS_GOOD);
}
else {
send_and_read_next();
}
}
else {
logf("Transfer failed %X",status);
send_csw(UMS_STATUS_FAIL);
/* TODO fill in cur_sense_data */
cur_sense_data.sense_key=0;
cur_sense_data.information=0;
cur_sense_data.asc=0;
cur_sense_data.ascq=0;
}
break;
}
}
/* called by usb_core_control_request() */
bool usb_storage_control_request(struct usb_ctrlrequest* req)
{
bool handled = false;
switch (req->bRequest) {
case USB_BULK_GET_MAX_LUN: {
#ifdef ONLY_EXPOSE_CARD_SLOT
*tb.max_lun = 0;
#else
*tb.max_lun = NUM_VOLUMES - 1;
#endif
logf("ums: getmaxlun");
usb_drv_send(EP_CONTROL, UNCACHED_ADDR(tb.max_lun), 1);
usb_drv_recv(EP_CONTROL, NULL, 0); /* ack */
handled = true;
break;
}
case USB_BULK_RESET_REQUEST:
logf("ums: bulk reset");
state = WAITING_FOR_COMMAND;
/* UMS BOT 3.1 says The device shall preserve the value of its bulk
data toggle bits and endpoint STALL conditions despite
the Bulk-Only Mass Storage Reset. */
#if 0
usb_drv_reset_endpoint(usb_endpoint, false);
usb_drv_reset_endpoint(usb_endpoint, true);
#endif
usb_drv_send(EP_CONTROL, NULL, 0); /* ack */
handled = true;
break;
}
return handled;
}
static void send_and_read_next(void)
{
if(cur_cmd.last_result!=0) {
/* The last read failed. */
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_MEDIUM_ERROR;
cur_sense_data.asc=ASC_READ_ERROR;
cur_sense_data.ascq=0;
return;
}
send_block_data(cur_cmd.data[cur_cmd.data_select],
MIN(BUFFER_SIZE,cur_cmd.count*SECTOR_SIZE));
/* Switch buffers for the next one */
cur_cmd.data_select=!cur_cmd.data_select;
cur_cmd.sector+=(BUFFER_SIZE/SECTOR_SIZE);
cur_cmd.count-=MIN(cur_cmd.count,BUFFER_SIZE/SECTOR_SIZE);
if(cur_cmd.count!=0){
/* already read the next bit, so we can send it out immediately when the
* current transfer completes. */
cur_cmd.last_result = ata_read_sectors(IF_MV2(cur_cmd.lun,)
cur_cmd.sector,
MIN(BUFFER_SIZE/SECTOR_SIZE,
cur_cmd.count),
cur_cmd.data[cur_cmd.data_select]);
}
}
/****************************************************************************/
static void handle_scsi(struct command_block_wrapper* cbw)
{
/* USB Mass Storage assumes LBA capability.
TODO: support 48-bit LBA */
unsigned int length = cbw->data_transfer_length;
unsigned int block_size = 0;
unsigned int block_count = 0;
bool lun_present=true;
#ifdef ONLY_EXPOSE_CARD_SLOT
unsigned char lun = cbw->lun+1;
#else
unsigned char lun = cbw->lun;
#endif
unsigned int block_size_mult = 1;
#ifdef HAVE_HOTSWAP
tCardInfo* cinfo = card_get_info(lun);
if(cinfo->initialized==1 && cinfo->numblocks > 0) {
block_size = cinfo->blocksize;
block_count = cinfo->numblocks;
}
else {
ejected[lun] = true;
try_release_ata();
}
#else
unsigned short* identify = ata_get_identify();
block_size = SECTOR_SIZE;
block_count = (identify[61] << 16 | identify[60]);
#endif
if(ejected[lun])
lun_present = false;
#ifdef MAX_LOG_SECTOR_SIZE
block_size_mult = disk_sector_multiplier;
#endif
cur_cmd.tag = cbw->tag;
cur_cmd.lun = lun;
switch (cbw->command_block[0]) {
case SCSI_TEST_UNIT_READY:
logf("scsi test_unit_ready %d",lun);
if(!usb_exclusive_ata()) {
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
break;
}
if(lun_present) {
send_csw(UMS_STATUS_GOOD);
}
else {
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
}
break;
case SCSI_REPORT_LUNS: {
logf("scsi inquiry %d",lun);
int allocation_length=0;
allocation_length|=(cbw->command_block[6]<<24);
allocation_length|=(cbw->command_block[7]<<16);
allocation_length|=(cbw->command_block[8]<<8);
allocation_length|=(cbw->command_block[9]);
memset(tb.lun_data,0,sizeof(struct report_lun_data));
#ifdef HAVE_HOTSWAP
tb.lun_data->lun_list_length=htobe32(16);
tb.lun_data->lun1[1]=1;
#else
tb.lun_data->lun_list_length=htobe32(8);
#endif
tb.lun_data->lun0[1]=0;
send_command_result(tb.lun_data,
MIN(sizeof(struct report_lun_data), length));
break;
}
case SCSI_INQUIRY:
logf("scsi inquiry %d",lun);
identify2inquiry(lun);
length = MIN(length, cbw->command_block[4]);
send_command_result(tb.inquiry,
MIN(sizeof(struct inquiry_data), length));
break;
case SCSI_REQUEST_SENSE: {
tb.sense_data->ResponseCode=0x70;/*current error*/
tb.sense_data->fei_sensekey=cur_sense_data.sense_key&0x0f;
tb.sense_data->Information=cur_sense_data.information;
tb.sense_data->AdditionalSenseLength=10;
tb.sense_data->CommandSpecificInformation=0;
tb.sense_data->AdditionalSenseCode=cur_sense_data.asc;
tb.sense_data->AdditionalSenseCodeQualifier=cur_sense_data.ascq;
tb.sense_data->FieldReplaceableUnitCode=0;
tb.sense_data->SKSV=0;
tb.sense_data->SenseKeySpecific=0;
logf("scsi request_sense %d",lun);
send_command_result(tb.sense_data, sizeof(struct sense_data));
break;
}
case SCSI_MODE_SENSE_10: {
if(! lun_present) {
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
break;
}
/*unsigned char pc = (cbw->command_block[2] & 0xc0) >>6;*/
unsigned char page_code = cbw->command_block[2] & 0x3f;
logf("scsi mode_sense_10 %d %X",lun,page_code);
switch(page_code) {
case 0x3f:
tb.ms_data_10->mode_data_length =
htobe16(sizeof(struct mode_sense_data_10)-2);
tb.ms_data_10->medium_type = 0;
tb.ms_data_10->device_specific = 0;
tb.ms_data_10->reserved = 0;
tb.ms_data_10->longlba = 1;
tb.ms_data_10->block_descriptor_length =
htobe16(sizeof(struct mode_sense_bdesc_longlba));
memset(tb.ms_data_10->block_descriptor.reserved,0,4);
memset(tb.ms_data_10->block_descriptor.num_blocks,0,8);
tb.ms_data_10->block_descriptor.num_blocks[4] =
((block_count/block_size_mult) & 0xff000000)>>24;
tb.ms_data_10->block_descriptor.num_blocks[5] =
((block_count/block_size_mult) & 0x00ff0000)>>16;
tb.ms_data_10->block_descriptor.num_blocks[6] =
((block_count/block_size_mult) & 0x0000ff00)>>8;
tb.ms_data_10->block_descriptor.num_blocks[7] =
((block_count/block_size_mult) & 0x000000ff);
tb.ms_data_10->block_descriptor.block_size[0] =
((block_size*block_size_mult) & 0xff000000)>>24;
tb.ms_data_10->block_descriptor.block_size[1] =
((block_size*block_size_mult) & 0x00ff0000)>>16;
tb.ms_data_10->block_descriptor.block_size[2] =
((block_size*block_size_mult) & 0x0000ff00)>>8;
tb.ms_data_10->block_descriptor.block_size[3] =
((block_size*block_size_mult) & 0x000000ff);
send_command_result(tb.ms_data_10,
MIN(sizeof(struct mode_sense_data_10), length));
break;
default:
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_ILLEGAL_REQUEST;
cur_sense_data.asc=ASC_INVALID_FIELD_IN_CBD;
cur_sense_data.ascq=0;
break;
}
break;
}
case SCSI_MODE_SENSE_6: {
if(! lun_present) {
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
break;
}
/*unsigned char pc = (cbw->command_block[2] & 0xc0) >>6;*/
unsigned char page_code = cbw->command_block[2] & 0x3f;
logf("scsi mode_sense_6 %d %X",lun,page_code);
switch(page_code) {
case 0x3f:
/* All supported pages. */
tb.ms_data_6->mode_data_length =
sizeof(struct mode_sense_data_6)-1;
tb.ms_data_6->medium_type = 0;
tb.ms_data_6->device_specific = 0;
tb.ms_data_6->block_descriptor_length =
sizeof(struct mode_sense_bdesc_shortlba);
tb.ms_data_6->block_descriptor.density_code = 0;
tb.ms_data_6->block_descriptor.reserved = 0;
if(block_count/block_size_mult > 0xffffff){
tb.ms_data_6->block_descriptor.num_blocks[0] = 0xff;
tb.ms_data_6->block_descriptor.num_blocks[1] = 0xff;
tb.ms_data_6->block_descriptor.num_blocks[2] = 0xff;
}
else {
tb.ms_data_6->block_descriptor.num_blocks[0] =
((block_count/block_size_mult) & 0xff0000)>>16;
tb.ms_data_6->block_descriptor.num_blocks[1] =
((block_count/block_size_mult) & 0x00ff00)>>8;
tb.ms_data_6->block_descriptor.num_blocks[2] =
((block_count/block_size_mult) & 0x0000ff);
}
tb.ms_data_6->block_descriptor.block_size[0] =
((block_size*block_size_mult) & 0xff0000)>>16;
tb.ms_data_6->block_descriptor.block_size[1] =
((block_size*block_size_mult) & 0x00ff00)>>8;
tb.ms_data_6->block_descriptor.block_size[2] =
((block_size*block_size_mult) & 0x0000ff);
send_command_result(tb.ms_data_6,
MIN(sizeof(struct mode_sense_data_6), length));
break;
default:
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_ILLEGAL_REQUEST;
cur_sense_data.asc=ASC_INVALID_FIELD_IN_CBD;
cur_sense_data.ascq=0;
break;
}
break;
}
case SCSI_START_STOP_UNIT:
logf("scsi start_stop unit %d",lun);
if((cbw->command_block[4] & 0xf0) == 0) /*load/eject bit is valid*/
{ /* Process start and eject bits */
logf("scsi load/eject");
if((cbw->command_block[4] & 0x01) == 0) /* Don't start */
{
if((cbw->command_block[4] & 0x02) != 0) /* eject */
{
logf("scsi eject");
ejected[lun]=true;
try_release_ata();
}
}
}
send_csw(UMS_STATUS_GOOD);
break;
case SCSI_ALLOW_MEDIUM_REMOVAL:
logf("scsi allow_medium_removal %d",lun);
/* TODO: use this to show the connect screen ? */
send_csw(UMS_STATUS_GOOD);
break;
case SCSI_READ_FORMAT_CAPACITY: {
logf("scsi read_format_capacity %d",lun);
if(lun_present) {
tb.format_capacity_data->following_length=htobe32(8);
/* "block count" actually means "number of last block" */
tb.format_capacity_data->block_count =
htobe32(block_count/block_size_mult - 1);
tb.format_capacity_data->block_size =
htobe32(block_size*block_size_mult);
tb.format_capacity_data->block_size |=
htobe32(SCSI_FORMAT_CAPACITY_FORMATTED_MEDIA);
send_command_result(tb.format_capacity_data,
MIN(sizeof(struct format_capacity), length));
}
else
{
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
}
break;
}
case SCSI_READ_CAPACITY: {
logf("scsi read_capacity %d",lun);
if(lun_present) {
/* "block count" actually means "number of last block" */
tb.capacity_data->block_count =
htobe32(block_count/block_size_mult - 1);
tb.capacity_data->block_size =
htobe32(block_size*block_size_mult);
send_command_result(tb.capacity_data,
MIN(sizeof(struct capacity), length));
}
else
{
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
}
break;
}
case SCSI_READ_10:
logf("scsi read10 %d",lun);
if(! lun_present) {
/* Windows expects an empty command result before the csw */
usb_drv_send(usb_endpoint, 0, 0);
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
break;
}
cur_cmd.data[0] = tb.transfer_buffer;
cur_cmd.data[1] = &tb.transfer_buffer[BUFFER_SIZE];
cur_cmd.data_select=0;
cur_cmd.sector = block_size_mult *
(cbw->command_block[2] << 24 |
cbw->command_block[3] << 16 |
cbw->command_block[4] << 8 |
cbw->command_block[5] );
cur_cmd.count = block_size_mult *
(cbw->command_block[7] << 8 |
cbw->command_block[8]);
//logf("scsi read %d %d", cur_cmd.sector, cur_cmd.count);
if((cur_cmd.sector + cur_cmd.count) > block_count) {
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_ILLEGAL_REQUEST;
cur_sense_data.asc=ASC_LBA_OUT_OF_RANGE;
cur_sense_data.ascq=0;
}
else {
cur_cmd.last_result = ata_read_sectors(IF_MV2(cur_cmd.lun,)
cur_cmd.sector,
MIN(BUFFER_SIZE/SECTOR_SIZE,
cur_cmd.count),
cur_cmd.data[cur_cmd.data_select]);
send_and_read_next();
}
break;
case SCSI_WRITE_10:
logf("scsi write10 %d",lun);
if(! lun_present) {
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_NOT_READY;
cur_sense_data.asc=ASC_MEDIUM_NOT_PRESENT;
cur_sense_data.ascq=0;
break;
}
cur_cmd.data[0] = tb.transfer_buffer;
cur_cmd.data[1] = &tb.transfer_buffer[BUFFER_SIZE];
cur_cmd.data_select=0;
cur_cmd.sector = block_size_mult *
(cbw->command_block[2] << 24 |
cbw->command_block[3] << 16 |
cbw->command_block[4] << 8 |
cbw->command_block[5] );
cur_cmd.count = block_size_mult *
(cbw->command_block[7] << 8 |
cbw->command_block[8]);
/* expect data */
if((cur_cmd.sector + cur_cmd.count) > block_count) {
send_csw(UMS_STATUS_FAIL);
cur_sense_data.sense_key=SENSE_ILLEGAL_REQUEST;
cur_sense_data.asc=ASC_LBA_OUT_OF_RANGE;
cur_sense_data.ascq=0;
}
else {
receive_block_data(cur_cmd.data[0],
MIN(BUFFER_SIZE,
cur_cmd.count*SECTOR_SIZE));
}
break;
default:
logf("scsi unknown cmd %x",cbw->command_block[0x0]);
usb_drv_stall(usb_endpoint, true,true);
send_csw(UMS_STATUS_FAIL);
break;
}
}
static void send_block_data(void *data,int size)
{
usb_drv_send_nonblocking(usb_endpoint, data,size);
state = SENDING_BLOCKS;
}
static void send_command_result(void *data,int size)
{
usb_drv_send_nonblocking(usb_endpoint, data,size);
state = SENDING_RESULT;
}
static void receive_block_data(void *data,int size)
{
usb_drv_recv(usb_endpoint, data, size);
state = RECEIVING_BLOCKS;
}
static void send_csw(int status)
{
tb.csw->signature = htole32(CSW_SIGNATURE);
tb.csw->tag = cur_cmd.tag;
tb.csw->data_residue = 0;
tb.csw->status = status;
usb_drv_send_nonblocking(usb_endpoint, tb.csw,
sizeof(struct command_status_wrapper));
state = SENDING_CSW;
//logf("CSW: %X",status);
if(status == UMS_STATUS_GOOD) {
cur_sense_data.sense_key=0;
cur_sense_data.information=0;
cur_sense_data.asc=0;
cur_sense_data.ascq=0;
}
}
/* convert ATA IDENTIFY to SCSI INQUIRY */
static void identify2inquiry(int lun)
{
#ifdef HAVE_FLASH_STORAGE
if(lun==0) {
memcpy(&tb.inquiry->VendorId,"Rockbox ",8);
memcpy(&tb.inquiry->ProductId,"Internal Storage",16);
memcpy(&tb.inquiry->ProductRevisionLevel,"0.00",4);
}
else {
memcpy(&tb.inquiry->VendorId,"Rockbox ",8);
memcpy(&tb.inquiry->ProductId,"SD Card Slot ",16);
memcpy(&tb.inquiry->ProductRevisionLevel,"0.00",4);
}
#else
unsigned int i;
unsigned short* dest;
unsigned short* src;
unsigned short* identify = ata_get_identify();
(void)lun;
memset(tb.inquiry, 0, sizeof(struct inquiry_data));
#if 0
if (identify[82] & 4)
tb.inquiry->DeviceTypeModifier = DEVICE_REMOVABLE;
#endif
/* ATA only has a 'model' field, so we copy the
first 8 bytes to 'vendor' and the rest to 'product' (they are
consecutive in the inquiry struct) */
src = (unsigned short*)&identify[27];
dest = (unsigned short*)&tb.inquiry->VendorId;
for (i=0;i<12;i++)
dest[i] = htobe16(src[i]);
src = (unsigned short*)&identify[23];
dest = (unsigned short*)&tb.inquiry->ProductRevisionLevel;
for (i=0;i<2;i++)
dest[i] = htobe16(src[i]);
#endif
tb.inquiry->DeviceType = DIRECT_ACCESS_DEVICE;
tb.inquiry->AdditionalLength = 0x1f;
tb.inquiry->Versions = 4; /* SPC-2 */
tb.inquiry->Format = 2; /* SPC-2/3 inquiry format */
#if 0
#ifdef HAVE_HOTSWAP
if(lun>0)
tb.inquiry->DeviceTypeModifier = DEVICE_REMOVABLE;
#endif
#endif
/* Mac OSX 10.5 doesn't like this driver if DEVICE_REMOVABLE is not set.
TODO : this can probably be solved by providing caching mode page */
tb.inquiry->DeviceTypeModifier = DEVICE_REMOVABLE;
}
#endif /* USB_STORAGE */
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