![Sebastian Andrzej Siewior](/assets/img/avatar_default.png)
The bcdDevice field is defined as |Device release number in binary-coded decimal in the USB 2.0 specification. We use this field to distinguish the UDCs from each other. In theory this could be used on the host side to apply certain quirks if the "special" UDC in combination with this gadget is used. This hasn't been done as far as I am aware. In practice it would be better to fix the UDC driver before shipping since a later release might not need this quirk anymore. There are some driver in tree (on the host side) which use the bcdDevice field to figure out special workarounds for a given firmware revision. This seems to make sense. Therefore this patch converts all gadgets (except a few) to use the kernel version instead a random 2 or 3 plus the UDC number. The few that don't report kernel's version are: - webcam This one reports always a version 0x10 so allow it to do so in future. - nokia This one reports always 0x211. The comment says that this gadget works only if the UDC supports altsettings so I added a check for this. - serial This one reports 0x2400 + UDC number. Since the gadget version is 2.4 this could make sense. Therefore bcdDevice is 0x2400 here. I also remove various gadget_is_<name> macros which are unused. The remaining few macros should be moved to feature / bug bitfield. Acked-by: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com>
232 lines
5.9 KiB
C
232 lines
5.9 KiB
C
/*
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* nokia.c -- Nokia Composite Gadget Driver
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*
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* Copyright (C) 2008-2010 Nokia Corporation
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* Contact: Felipe Balbi <felipe.balbi@nokia.com>
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*
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* This gadget driver borrows from serial.c which is:
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*
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* Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
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* Copyright (C) 2008 by David Brownell
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* Copyright (C) 2008 by Nokia Corporation
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*
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* This software is distributed under the terms of the GNU General
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* Public License ("GPL") as published by the Free Software Foundation,
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* version 2 of that License.
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include "u_serial.h"
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#include "u_ether.h"
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#include "u_phonet.h"
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#include "gadget_chips.h"
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/* Defines */
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#define NOKIA_VERSION_NUM 0x0211
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#define NOKIA_LONG_NAME "N900 (PC-Suite Mode)"
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/*-------------------------------------------------------------------------*/
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/*
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* Kbuild is not very cooperative with respect to linking separately
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* compiled library objects into one module. So for now we won't use
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* separate compilation ... ensuring init/exit sections work to shrink
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* the runtime footprint, and giving us at least some parts of what
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* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
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*/
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#include "u_serial.c"
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#include "f_acm.c"
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#include "f_ecm.c"
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#include "f_obex.c"
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#include "f_serial.c"
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#include "f_phonet.c"
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#include "u_ether.c"
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/*-------------------------------------------------------------------------*/
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USB_GADGET_COMPOSITE_OPTIONS();
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#define NOKIA_VENDOR_ID 0x0421 /* Nokia */
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#define NOKIA_PRODUCT_ID 0x01c8 /* Nokia Gadget */
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/* string IDs are assigned dynamically */
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#define STRING_DESCRIPTION_IDX USB_GADGET_FIRST_AVAIL_IDX
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static char manufacturer_nokia[] = "Nokia";
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static const char product_nokia[] = NOKIA_LONG_NAME;
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static const char description_nokia[] = "PC-Suite Configuration";
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static struct usb_string strings_dev[] = {
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[USB_GADGET_MANUFACTURER_IDX].s = manufacturer_nokia,
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[USB_GADGET_PRODUCT_IDX].s = NOKIA_LONG_NAME,
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[USB_GADGET_SERIAL_IDX].s = "",
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[STRING_DESCRIPTION_IDX].s = description_nokia,
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{ } /* end of list */
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};
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static struct usb_gadget_strings stringtab_dev = {
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.language = 0x0409, /* en-us */
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.strings = strings_dev,
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};
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static struct usb_gadget_strings *dev_strings[] = {
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&stringtab_dev,
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NULL,
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};
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static struct usb_device_descriptor device_desc = {
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.bLength = USB_DT_DEVICE_SIZE,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = __constant_cpu_to_le16(0x0200),
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.bDeviceClass = USB_CLASS_COMM,
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.idVendor = __constant_cpu_to_le16(NOKIA_VENDOR_ID),
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.idProduct = __constant_cpu_to_le16(NOKIA_PRODUCT_ID),
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.bcdDevice = cpu_to_le16(NOKIA_VERSION_NUM),
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/* .iManufacturer = DYNAMIC */
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/* .iProduct = DYNAMIC */
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.bNumConfigurations = 1,
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};
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/*-------------------------------------------------------------------------*/
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/* Module */
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MODULE_DESCRIPTION("Nokia composite gadget driver for N900");
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MODULE_AUTHOR("Felipe Balbi");
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MODULE_LICENSE("GPL");
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/*-------------------------------------------------------------------------*/
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static u8 hostaddr[ETH_ALEN];
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static int __init nokia_bind_config(struct usb_configuration *c)
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{
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int status = 0;
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status = phonet_bind_config(c);
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if (status)
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printk(KERN_DEBUG "could not bind phonet config\n");
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status = obex_bind_config(c, 0);
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if (status)
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printk(KERN_DEBUG "could not bind obex config %d\n", 0);
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status = obex_bind_config(c, 1);
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if (status)
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printk(KERN_DEBUG "could not bind obex config %d\n", 0);
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status = acm_bind_config(c, 2);
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if (status)
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printk(KERN_DEBUG "could not bind acm config\n");
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status = ecm_bind_config(c, hostaddr);
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if (status)
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printk(KERN_DEBUG "could not bind ecm config\n");
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return status;
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}
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static struct usb_configuration nokia_config_500ma_driver = {
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.label = "Bus Powered",
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.bConfigurationValue = 1,
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/* .iConfiguration = DYNAMIC */
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.bmAttributes = USB_CONFIG_ATT_ONE,
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.bMaxPower = 250, /* 500mA */
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};
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static struct usb_configuration nokia_config_100ma_driver = {
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.label = "Self Powered",
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.bConfigurationValue = 2,
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/* .iConfiguration = DYNAMIC */
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.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
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.bMaxPower = 50, /* 100 mA */
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};
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static int __init nokia_bind(struct usb_composite_dev *cdev)
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{
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struct usb_gadget *gadget = cdev->gadget;
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int status;
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status = gphonet_setup(cdev->gadget);
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if (status < 0)
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goto err_phonet;
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status = gserial_setup(cdev->gadget, 3);
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if (status < 0)
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goto err_serial;
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status = gether_setup(cdev->gadget, hostaddr);
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if (status < 0)
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goto err_ether;
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status = usb_string_ids_tab(cdev, strings_dev);
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if (status < 0)
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goto err_usb;
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device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
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device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
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status = strings_dev[STRING_DESCRIPTION_IDX].id;
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nokia_config_500ma_driver.iConfiguration = status;
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nokia_config_100ma_driver.iConfiguration = status;
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if (!gadget_supports_altsettings(gadget))
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goto err_usb;
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/* finally register the configuration */
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status = usb_add_config(cdev, &nokia_config_500ma_driver,
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nokia_bind_config);
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if (status < 0)
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goto err_usb;
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status = usb_add_config(cdev, &nokia_config_100ma_driver,
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nokia_bind_config);
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if (status < 0)
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goto err_usb;
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usb_composite_overwrite_options(cdev, &coverwrite);
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dev_info(&gadget->dev, "%s\n", NOKIA_LONG_NAME);
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return 0;
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err_usb:
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gether_cleanup();
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err_ether:
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gserial_cleanup();
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err_serial:
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gphonet_cleanup();
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err_phonet:
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return status;
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}
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static int __exit nokia_unbind(struct usb_composite_dev *cdev)
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{
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gphonet_cleanup();
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gserial_cleanup();
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gether_cleanup();
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return 0;
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}
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static __refdata struct usb_composite_driver nokia_driver = {
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.name = "g_nokia",
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.dev = &device_desc,
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.strings = dev_strings,
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.max_speed = USB_SPEED_HIGH,
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.bind = nokia_bind,
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.unbind = __exit_p(nokia_unbind),
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};
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static int __init nokia_init(void)
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{
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return usb_composite_probe(&nokia_driver);
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}
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module_init(nokia_init);
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static void __exit nokia_cleanup(void)
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{
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usb_composite_unregister(&nokia_driver);
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}
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module_exit(nokia_cleanup);
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