diff options
Diffstat (limited to 'drivers/usb/gadget/mass_storage.c')
| -rw-r--r-- | drivers/usb/gadget/mass_storage.c | 172 |
1 files changed, 129 insertions, 43 deletions
diff --git a/drivers/usb/gadget/mass_storage.c b/drivers/usb/gadget/mass_storage.c index 0769179dbdb..8e27a8c9644 100644 --- a/drivers/usb/gadget/mass_storage.c +++ b/drivers/usb/gadget/mass_storage.c @@ -3,22 +3,13 @@ * * Copyright (C) 2003-2008 Alan Stern * Copyright (C) 2009 Samsung Electronics - * Author: Michal Nazarewicz <m.nazarewicz@samsung.com> + * Author: Michal Nazarewicz <mina86@mina86.com> * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ @@ -38,32 +29,27 @@ #include <linux/kernel.h> -#include <linux/utsname.h> #include <linux/usb/ch9.h> - +#include <linux/module.h> /*-------------------------------------------------------------------------*/ #define DRIVER_DESC "Mass Storage Gadget" #define DRIVER_VERSION "2009/09/11" -/*-------------------------------------------------------------------------*/ - /* - * kbuild is not very cooperative with respect to linking separately - * compiled library objects into one module. So for now we won't use - * separate compilation ... ensuring init/exit sections work to shrink - * the runtime footprint, and giving us at least some parts of what - * a "gcc --combine ... part1.c part2.c part3.c ... " build would. + * 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 */ -#include "composite.c" -#include "usbstring.c" -#include "config.c" -#include "epautoconf.c" -#include "f_mass_storage.c" +#include "f_mass_storage.h" /*-------------------------------------------------------------------------*/ +USB_GADGET_COMPOSITE_OPTIONS(); static struct usb_device_descriptor msg_device_desc = { .bLength = sizeof msg_device_desc, @@ -94,15 +80,48 @@ static const struct usb_descriptor_header *otg_desc[] = { NULL, }; +static struct usb_string strings_dev[] = { + [USB_GADGET_MANUFACTURER_IDX].s = "", + [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC, + [USB_GADGET_SERIAL_IDX].s = "", + { } /* end of list */ +}; + +static struct usb_gadget_strings stringtab_dev = { + .language = 0x0409, /* en-us */ + .strings = strings_dev, +}; + +static struct usb_gadget_strings *dev_strings[] = { + &stringtab_dev, + NULL, +}; + +static struct usb_function_instance *fi_msg; +static struct usb_function *f_msg; /****************************** Configurations ******************************/ static struct fsg_module_parameters mod_data = { .stall = 1 }; +#ifdef CONFIG_USB_GADGET_DEBUG_FILES + +static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS; + +#else + +/* + * Number of buffers we will use. + * 2 is usually enough for good buffering pipeline + */ +#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS + +#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ + FSG_MODULE_PARAMETERS(/* no prefix */, mod_data); -static unsigned long msg_registered = 0; +static unsigned long msg_registered; static void msg_cleanup(void); static int msg_thread_exits(struct fsg_common *common) @@ -113,13 +132,7 @@ static int msg_thread_exits(struct fsg_common *common) static int __init msg_do_config(struct usb_configuration *c) { - static const struct fsg_operations ops = { - .thread_exits = msg_thread_exits, - }; - static struct fsg_common common; - - struct fsg_common *retp; - struct fsg_config config; + struct fsg_opts *opts; int ret; if (gadget_is_otg(c->cdev->gadget)) { @@ -127,15 +140,24 @@ static int __init msg_do_config(struct usb_configuration *c) c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; } - fsg_config_from_params(&config, &mod_data); - config.ops = &ops; + opts = fsg_opts_from_func_inst(fi_msg); - retp = fsg_common_init(&common, c->cdev, &config); - if (IS_ERR(retp)) - return PTR_ERR(retp); + f_msg = usb_get_function(fi_msg); + if (IS_ERR(f_msg)) + return PTR_ERR(f_msg); - ret = fsg_bind_config(c->cdev, c, &common); - fsg_common_put(&common); + ret = fsg_common_run_thread(opts->common); + if (ret) + goto put_func; + + ret = usb_add_function(c, f_msg); + if (ret) + goto put_func; + + return 0; + +put_func: + usb_put_function(f_msg); return ret; } @@ -150,26 +172,90 @@ static struct usb_configuration msg_config_driver = { static int __init msg_bind(struct usb_composite_dev *cdev) { + static const struct fsg_operations ops = { + .thread_exits = msg_thread_exits, + }; + struct fsg_opts *opts; + struct fsg_config config; int status; + fi_msg = usb_get_function_instance("mass_storage"); + if (IS_ERR(fi_msg)) + return PTR_ERR(fi_msg); + + fsg_config_from_params(&config, &mod_data, fsg_num_buffers); + opts = fsg_opts_from_func_inst(fi_msg); + + opts->no_configfs = true; + status = fsg_common_set_num_buffers(opts->common, fsg_num_buffers); + if (status) + goto fail; + + status = fsg_common_set_nluns(opts->common, config.nluns); + if (status) + goto fail_set_nluns; + + fsg_common_set_ops(opts->common, &ops); + + status = fsg_common_set_cdev(opts->common, cdev, config.can_stall); + if (status) + goto fail_set_cdev; + + fsg_common_set_sysfs(opts->common, true); + status = fsg_common_create_luns(opts->common, &config); + if (status) + goto fail_set_cdev; + + fsg_common_set_inquiry_string(opts->common, config.vendor_name, + config.product_name); + + status = usb_string_ids_tab(cdev, strings_dev); + if (status < 0) + goto fail_string_ids; + msg_device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id; + status = usb_add_config(cdev, &msg_config_driver, msg_do_config); if (status < 0) - return status; + goto fail_string_ids; + usb_composite_overwrite_options(cdev, &coverwrite); dev_info(&cdev->gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n"); set_bit(0, &msg_registered); return 0; + +fail_string_ids: + fsg_common_remove_luns(opts->common); +fail_set_cdev: + fsg_common_free_luns(opts->common); +fail_set_nluns: + fsg_common_free_buffers(opts->common); +fail: + usb_put_function_instance(fi_msg); + return status; } +static int msg_unbind(struct usb_composite_dev *cdev) +{ + if (!IS_ERR(f_msg)) + usb_put_function(f_msg); + + if (!IS_ERR(fi_msg)) + usb_put_function_instance(fi_msg); + + return 0; +} /****************************** Some noise ******************************/ -static struct usb_composite_driver msg_driver = { +static __refdata struct usb_composite_driver msg_driver = { .name = "g_mass_storage", .dev = &msg_device_desc, - .iProduct = DRIVER_DESC, + .max_speed = USB_SPEED_SUPER, .needs_serial = 1, + .strings = dev_strings, + .bind = msg_bind, + .unbind = msg_unbind, }; MODULE_DESCRIPTION(DRIVER_DESC); @@ -178,7 +264,7 @@ MODULE_LICENSE("GPL"); static int __init msg_init(void) { - return usb_composite_probe(&msg_driver, msg_bind); + return usb_composite_probe(&msg_driver); } module_init(msg_init); |