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remarkable-uboot/drivers/usb/gadget/storage_common.c

405 lines
11 KiB
C

/*
* storage_common.c -- Common definitions for mass storage functionality
*
* Copyright (C) 2003-2008 Alan Stern
* Copyeight (C) 2009 Samsung Electronics
* Author: Michal Nazarewicz (m.nazarewicz@samsung.com)
*
* Ported to u-boot:
* Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*
* Code refactoring & cleanup:
* Ɓukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* This file requires the following identifiers used in USB strings to
* be defined (each of type pointer to char):
* - fsg_string_manufacturer -- name of the manufacturer
* - fsg_string_product -- name of the product
* - fsg_string_serial -- product's serial
* - fsg_string_config -- name of the configuration
* - fsg_string_interface -- name of the interface
* The first four are only needed when FSG_DESCRIPTORS_DEVICE_STRINGS
* macro is defined prior to including this file.
*/
/*
* When FSG_NO_INTR_EP is defined fsg_fs_intr_in_desc and
* fsg_hs_intr_in_desc objects as well as
* FSG_FS_FUNCTION_PRE_EP_ENTRIES and FSG_HS_FUNCTION_PRE_EP_ENTRIES
* macros are not defined.
*
* When FSG_NO_DEVICE_STRINGS is defined FSG_STRING_MANUFACTURER,
* FSG_STRING_PRODUCT, FSG_STRING_SERIAL and FSG_STRING_CONFIG are not
* defined (as well as corresponding entries in string tables are
* missing) and FSG_STRING_INTERFACE has value of zero.
*
* When FSG_NO_OTG is defined fsg_otg_desc won't be defined.
*/
/*
* When FSG_BUFFHD_STATIC_BUFFER is defined when this file is included
* the fsg_buffhd structure's buf field will be an array of FSG_BUFLEN
* characters rather then a pointer to void.
*/
/* #include <asm/unaligned.h> */
/*
* Thanks to NetChip Technologies for donating this product ID.
*
* DO NOT REUSE THESE IDs with any other driver!! Ever!!
* Instead: allocate your own, using normal USB-IF procedures.
*/
#define FSG_VENDOR_ID 0x0525 /* NetChip */
#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
/*-------------------------------------------------------------------------*/
#ifndef DEBUG
#undef VERBOSE_DEBUG
#undef DUMP_MSGS
#endif /* !DEBUG */
#ifdef VERBOSE_DEBUG
#define VLDBG LDBG
#else
#define VLDBG(lun, fmt, args...) do { } while (0)
#endif /* VERBOSE_DEBUG */
/*
#define LDBG(lun, fmt, args...) dev_dbg (&(lun)->dev, fmt, ## args)
#define LERROR(lun, fmt, args...) dev_err (&(lun)->dev, fmt, ## args)
#define LWARN(lun, fmt, args...) dev_warn(&(lun)->dev, fmt, ## args)
#define LINFO(lun, fmt, args...) dev_info(&(lun)->dev, fmt, ## args)
*/
#define LDBG(lun, fmt, args...) do { } while (0)
#define LERROR(lun, fmt, args...) do { } while (0)
#define LWARN(lun, fmt, args...) do { } while (0)
#define LINFO(lun, fmt, args...) do { } while (0)
/*
* Keep those macros in sync with those in
* include/linux/usb/composite.h or else GCC will complain. If they
* are identical (the same names of arguments, white spaces in the
* same places) GCC will allow redefinition otherwise (even if some
* white space is removed or added) warning will be issued.
*
* Those macros are needed here because File Storage Gadget does not
* include the composite.h header. For composite gadgets those macros
* are redundant since composite.h is included any way.
*
* One could check whether those macros are already defined (which
* would indicate composite.h had been included) or not (which would
* indicate we were in FSG) but this is not done because a warning is
* desired if definitions here differ from the ones in composite.h.
*
* We want the definitions to match and be the same in File Storage
* Gadget as well as Mass Storage Function (and so composite gadgets
* using MSF). If someone changes them in composite.h it will produce
* a warning in this file when building MSF.
*/
#define DBG(d, fmt, args...) debug(fmt , ## args)
#define VDBG(d, fmt, args...) debug(fmt , ## args)
/* #define ERROR(d, fmt, args...) printf(fmt , ## args) */
/* #define WARNING(d, fmt, args...) printf(fmt , ## args) */
/* #define INFO(d, fmt, args...) printf(fmt , ## args) */
/* #define DBG(d, fmt, args...) do { } while (0) */
/* #define VDBG(d, fmt, args...) do { } while (0) */
#define ERROR(d, fmt, args...) do { } while (0)
#define WARNING(d, fmt, args...) do { } while (0)
#define INFO(d, fmt, args...) do { } while (0)
#ifdef DUMP_MSGS
/* dump_msg(fsg, const char * label, const u8 * buf, unsigned length); */
# define dump_msg(fsg, label, buf, length) do { \
if (length < 512) { \
DBG(fsg, "%s, length %u:\n", label, length); \
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
16, 1, buf, length, 0); \
} \
} while (0)
# define dump_cdb(fsg) do { } while (0)
#else
# define dump_msg(fsg, /* const char * */ label, \
/* const u8 * */ buf, /* unsigned */ length) do { } while (0)
# ifdef VERBOSE_DEBUG
# define dump_cdb(fsg) \
print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
# else
# define dump_cdb(fsg) do { } while (0)
# endif /* VERBOSE_DEBUG */
#endif /* DUMP_MSGS */
#include <usb_mass_storage.h>
/*-------------------------------------------------------------------------*/
static inline u32 get_unaligned_be24(u8 *buf)
{
return 0xffffff & (u32) get_unaligned_be32(buf - 1);
}
/*-------------------------------------------------------------------------*/
enum {
#ifndef FSG_NO_DEVICE_STRINGS
FSG_STRING_MANUFACTURER = 1,
FSG_STRING_PRODUCT,
FSG_STRING_SERIAL,
FSG_STRING_CONFIG,
#endif
FSG_STRING_INTERFACE
};
#ifndef FSG_NO_OTG
static struct usb_otg_descriptor
fsg_otg_desc = {
.bLength = sizeof fsg_otg_desc,
.bDescriptorType = USB_DT_OTG,
.bmAttributes = USB_OTG_SRP,
};
#endif
/* There is only one interface. */
static struct usb_interface_descriptor
fsg_intf_desc = {
.bLength = sizeof fsg_intf_desc,
.bDescriptorType = USB_DT_INTERFACE,
.bNumEndpoints = 2, /* Adjusted during fsg_bind() */
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
.bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
.bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
.iInterface = FSG_STRING_INTERFACE,
};
/*
* Three full-speed endpoint descriptors: bulk-in, bulk-out, and
* interrupt-in.
*/
static struct usb_endpoint_descriptor
fsg_fs_bulk_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
/* wMaxPacketSize set by autoconfiguration */
};
static struct usb_endpoint_descriptor
fsg_fs_bulk_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
/* wMaxPacketSize set by autoconfiguration */
};
#ifndef FSG_NO_INTR_EP
static struct usb_endpoint_descriptor
fsg_fs_intr_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = cpu_to_le16(2),
.bInterval = 32, /* frames -> 32 ms */
};
#ifndef FSG_NO_OTG
# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 2
#else
# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 1
#endif
#endif
static struct usb_descriptor_header *fsg_fs_function[] = {
#ifndef FSG_NO_OTG
(struct usb_descriptor_header *) &fsg_otg_desc,
#endif
(struct usb_descriptor_header *) &fsg_intf_desc,
(struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
(struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
#ifndef FSG_NO_INTR_EP
(struct usb_descriptor_header *) &fsg_fs_intr_in_desc,
#endif
NULL,
};
/*
* USB 2.0 devices need to expose both high speed and full speed
* descriptors, unless they only run at full speed.
*
* That means alternate endpoint descriptors (bigger packets)
* and a "device qualifier" ... plus more construction options
* for the configuration descriptor.
*/
static struct usb_endpoint_descriptor
fsg_hs_bulk_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
/* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(512),
};
static struct usb_endpoint_descriptor
fsg_hs_bulk_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
/* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(512),
.bInterval = 1, /* NAK every 1 uframe */
};
#ifndef FSG_NO_INTR_EP
static struct usb_endpoint_descriptor
fsg_hs_intr_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
/* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = cpu_to_le16(2),
.bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
};
#ifndef FSG_NO_OTG
# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 2
#else
# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 1
#endif
#endif
static struct usb_descriptor_header *fsg_hs_function[] = {
#ifndef FSG_NO_OTG
(struct usb_descriptor_header *) &fsg_otg_desc,
#endif
(struct usb_descriptor_header *) &fsg_intf_desc,
(struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
(struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
#ifndef FSG_NO_INTR_EP
(struct usb_descriptor_header *) &fsg_hs_intr_in_desc,
#endif
NULL,
};
/* Maxpacket and other transfer characteristics vary by speed. */
static struct usb_endpoint_descriptor *
fsg_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
struct usb_endpoint_descriptor *hs)
{
if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
return hs;
return fs;
}
/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
static struct usb_string fsg_strings[] = {
#ifndef FSG_NO_DEVICE_STRINGS
{FSG_STRING_MANUFACTURER, fsg_string_manufacturer},
{FSG_STRING_PRODUCT, fsg_string_product},
{FSG_STRING_SERIAL, fsg_string_serial},
{FSG_STRING_CONFIG, fsg_string_config},
#endif
{FSG_STRING_INTERFACE, fsg_string_interface},
{}
};
static struct usb_gadget_strings fsg_stringtab = {
.language = 0x0409, /* en-us */
.strings = fsg_strings,
};
/*-------------------------------------------------------------------------*/
/*
* If the next two routines are called while the gadget is registered,
* the caller must own fsg->filesem for writing.
*/
static int fsg_lun_open(struct fsg_lun *curlun, unsigned int num_sectors,
const char *filename)
{
int ro;
/* R/W if we can, R/O if we must */
ro = curlun->initially_ro;
curlun->ro = ro;
curlun->file_length = num_sectors << 9;
curlun->num_sectors = num_sectors;
debug("open backing file: %s\n", filename);
return 0;
}
static void fsg_lun_close(struct fsg_lun *curlun)
{
}
/*-------------------------------------------------------------------------*/
/*
* Sync the file data, don't bother with the metadata.
* This code was copied from fs/buffer.c:sys_fdatasync().
*/
static int fsg_lun_fsync_sub(struct fsg_lun *curlun)
{
return 0;
}
static void store_cdrom_address(u8 *dest, int msf, u32 addr)
{
if (msf) {
/* Convert to Minutes-Seconds-Frames */
addr >>= 2; /* Convert to 2048-byte frames */
addr += 2*75; /* Lead-in occupies 2 seconds */
dest[3] = addr % 75; /* Frames */
addr /= 75;
dest[2] = addr % 60; /* Seconds */
addr /= 60;
dest[1] = addr; /* Minutes */
dest[0] = 0; /* Reserved */
} else {
/* Absolute sector */
put_unaligned_be32(addr, dest);
}
}
/*-------------------------------------------------------------------------*/