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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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d7e2853679
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Johan Hovold <johan@kernel.org> Cc: Ruslan Bilovol <ruslan.bilovol@gmail.com> Cc: Peter Chen <peter.chen@nxp.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Windsor <dwindsor@gmail.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
278 lines
6.9 KiB
C
278 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* serial.c -- USB gadget serial driver
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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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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include "u_serial.h"
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/* Defines */
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#define GS_VERSION_STR "v2.4"
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#define GS_VERSION_NUM 0x2400
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#define GS_LONG_NAME "Gadget Serial"
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#define GS_VERSION_NAME GS_LONG_NAME " " GS_VERSION_STR
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/*-------------------------------------------------------------------------*/
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USB_GADGET_COMPOSITE_OPTIONS();
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/* Thanks to NetChip Technologies for donating this product ID.
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*
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* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
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* Instead: allocate your own, using normal USB-IF procedures.
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*/
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#define GS_VENDOR_ID 0x0525 /* NetChip */
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#define GS_PRODUCT_ID 0xa4a6 /* Linux-USB Serial Gadget */
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#define GS_CDC_PRODUCT_ID 0xa4a7 /* ... as CDC-ACM */
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#define GS_CDC_OBEX_PRODUCT_ID 0xa4a9 /* ... as CDC-OBEX */
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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 struct usb_string strings_dev[] = {
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[USB_GADGET_MANUFACTURER_IDX].s = "",
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[USB_GADGET_PRODUCT_IDX].s = GS_VERSION_NAME,
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[USB_GADGET_SERIAL_IDX].s = "",
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[STRING_DESCRIPTION_IDX].s = NULL /* updated; f(use_acm) */,
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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 = DYNAMIC */
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/* .bDeviceClass = f(use_acm) */
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.bDeviceSubClass = 0,
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.bDeviceProtocol = 0,
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/* .bMaxPacketSize0 = f(hardware) */
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.idVendor = cpu_to_le16(GS_VENDOR_ID),
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/* .idProduct = f(use_acm) */
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.bcdDevice = cpu_to_le16(GS_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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static const struct usb_descriptor_header *otg_desc[2];
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/*-------------------------------------------------------------------------*/
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/* Module */
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MODULE_DESCRIPTION(GS_VERSION_NAME);
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MODULE_AUTHOR("Al Borchers");
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MODULE_AUTHOR("David Brownell");
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MODULE_LICENSE("GPL");
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static bool use_acm = true;
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module_param(use_acm, bool, 0);
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MODULE_PARM_DESC(use_acm, "Use CDC ACM, default=yes");
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static bool use_obex = false;
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module_param(use_obex, bool, 0);
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MODULE_PARM_DESC(use_obex, "Use CDC OBEX, default=no");
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static unsigned n_ports = 1;
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module_param(n_ports, uint, 0);
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MODULE_PARM_DESC(n_ports, "number of ports to create, default=1");
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/*-------------------------------------------------------------------------*/
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static struct usb_configuration serial_config_driver = {
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/* .label = f(use_acm) */
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/* .bConfigurationValue = f(use_acm) */
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/* .iConfiguration = DYNAMIC */
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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};
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static struct usb_function_instance *fi_serial[MAX_U_SERIAL_PORTS];
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static struct usb_function *f_serial[MAX_U_SERIAL_PORTS];
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static int serial_register_ports(struct usb_composite_dev *cdev,
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struct usb_configuration *c, const char *f_name)
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{
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int i;
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int ret;
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ret = usb_add_config_only(cdev, c);
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if (ret)
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goto out;
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for (i = 0; i < n_ports; i++) {
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fi_serial[i] = usb_get_function_instance(f_name);
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if (IS_ERR(fi_serial[i])) {
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ret = PTR_ERR(fi_serial[i]);
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goto fail;
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}
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f_serial[i] = usb_get_function(fi_serial[i]);
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if (IS_ERR(f_serial[i])) {
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ret = PTR_ERR(f_serial[i]);
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goto err_get_func;
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}
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ret = usb_add_function(c, f_serial[i]);
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if (ret)
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goto err_add_func;
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}
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return 0;
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err_add_func:
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usb_put_function(f_serial[i]);
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err_get_func:
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usb_put_function_instance(fi_serial[i]);
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fail:
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i--;
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while (i >= 0) {
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usb_remove_function(c, f_serial[i]);
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usb_put_function(f_serial[i]);
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usb_put_function_instance(fi_serial[i]);
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i--;
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}
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out:
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return ret;
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}
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static int gs_bind(struct usb_composite_dev *cdev)
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{
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int status;
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/* Allocate string descriptor numbers ... note that string
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* contents can be overridden by the composite_dev glue.
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*/
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status = usb_string_ids_tab(cdev, strings_dev);
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if (status < 0)
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goto fail;
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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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serial_config_driver.iConfiguration = status;
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if (gadget_is_otg(cdev->gadget)) {
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if (!otg_desc[0]) {
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struct usb_descriptor_header *usb_desc;
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usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
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if (!usb_desc) {
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status = -ENOMEM;
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goto fail;
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}
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usb_otg_descriptor_init(cdev->gadget, usb_desc);
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otg_desc[0] = usb_desc;
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otg_desc[1] = NULL;
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}
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serial_config_driver.descriptors = otg_desc;
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serial_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
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}
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/* register our configuration */
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if (use_acm) {
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status = serial_register_ports(cdev, &serial_config_driver,
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"acm");
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usb_ep_autoconfig_reset(cdev->gadget);
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} else if (use_obex)
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status = serial_register_ports(cdev, &serial_config_driver,
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"obex");
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else {
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status = serial_register_ports(cdev, &serial_config_driver,
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"gser");
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}
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if (status < 0)
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goto fail1;
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usb_composite_overwrite_options(cdev, &coverwrite);
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INFO(cdev, "%s\n", GS_VERSION_NAME);
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return 0;
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fail1:
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kfree(otg_desc[0]);
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otg_desc[0] = NULL;
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fail:
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return status;
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}
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static int gs_unbind(struct usb_composite_dev *cdev)
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{
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int i;
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for (i = 0; i < n_ports; i++) {
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usb_put_function(f_serial[i]);
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usb_put_function_instance(fi_serial[i]);
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}
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kfree(otg_desc[0]);
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otg_desc[0] = NULL;
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return 0;
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}
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static struct usb_composite_driver gserial_driver = {
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.name = "g_serial",
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.dev = &device_desc,
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.strings = dev_strings,
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.max_speed = USB_SPEED_SUPER,
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.bind = gs_bind,
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.unbind = gs_unbind,
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};
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static int __init init(void)
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{
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/* We *could* export two configs; that'd be much cleaner...
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* but neither of these product IDs was defined that way.
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*/
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if (use_acm) {
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serial_config_driver.label = "CDC ACM config";
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serial_config_driver.bConfigurationValue = 2;
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device_desc.bDeviceClass = USB_CLASS_COMM;
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device_desc.idProduct =
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cpu_to_le16(GS_CDC_PRODUCT_ID);
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} else if (use_obex) {
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serial_config_driver.label = "CDC OBEX config";
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serial_config_driver.bConfigurationValue = 3;
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device_desc.bDeviceClass = USB_CLASS_COMM;
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device_desc.idProduct =
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cpu_to_le16(GS_CDC_OBEX_PRODUCT_ID);
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} else {
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serial_config_driver.label = "Generic Serial config";
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serial_config_driver.bConfigurationValue = 1;
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device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
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device_desc.idProduct =
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cpu_to_le16(GS_PRODUCT_ID);
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}
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strings_dev[STRING_DESCRIPTION_IDX].s = serial_config_driver.label;
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return usb_composite_probe(&gserial_driver);
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}
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module_init(init);
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static void __exit cleanup(void)
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{
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usb_composite_unregister(&gserial_driver);
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}
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module_exit(cleanup);
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