^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * hid.c -- HID Composite driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Based on multi.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@barco.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/usb/composite.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/usb/g_hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define DRIVER_DESC "HID Gadget"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define DRIVER_VERSION "2010/03/16"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "u_hid.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define HIDG_VENDOR_NUM 0x0525 /* XXX NetChip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define HIDG_PRODUCT_NUM 0xa4ac /* Linux-USB HID gadget */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct hidg_func_node {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct usb_function_instance *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct usb_function *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct list_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct hidg_func_descriptor *func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static LIST_HEAD(hidg_func_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) USB_GADGET_COMPOSITE_OPTIONS();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static struct usb_device_descriptor device_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .bLength = sizeof device_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .bDescriptorType = USB_DT_DEVICE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /* .bcdUSB = DYNAMIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* .bDeviceClass = USB_CLASS_COMM, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* .bDeviceSubClass = 0, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* .bDeviceProtocol = 0, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .bDeviceClass = USB_CLASS_PER_INTERFACE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .bDeviceSubClass = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .bDeviceProtocol = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* .bMaxPacketSize0 = f(hardware) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* Vendor and product id can be overridden by module parameters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .idVendor = cpu_to_le16(HIDG_VENDOR_NUM),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .idProduct = cpu_to_le16(HIDG_PRODUCT_NUM),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* .bcdDevice = f(hardware) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* .iManufacturer = DYNAMIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* .iProduct = DYNAMIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* NO SERIAL NUMBER */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .bNumConfigurations = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static const struct usb_descriptor_header *otg_desc[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* string IDs are assigned dynamically */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static struct usb_string strings_dev[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) [USB_GADGET_MANUFACTURER_IDX].s = "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) [USB_GADGET_SERIAL_IDX].s = "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) { } /* end of list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static struct usb_gadget_strings stringtab_dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .language = 0x0409, /* en-us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .strings = strings_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static struct usb_gadget_strings *dev_strings[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) &stringtab_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /****************************** Configurations ******************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static int do_config(struct usb_configuration *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct hidg_func_node *e, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (gadget_is_otg(c->cdev->gadget)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) c->descriptors = otg_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) list_for_each_entry(e, &hidg_func_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) e->f = usb_get_function(e->fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (IS_ERR(e->f)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) status = PTR_ERR(e->f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) goto put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) status = usb_add_function(c, e->f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (status < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) usb_put_function(e->f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) goto put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) list_for_each_entry(n, &hidg_func_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (n == e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) usb_remove_function(c, n->f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) usb_put_function(n->f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static struct usb_configuration config_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .label = "HID Gadget",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .bConfigurationValue = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* .iConfiguration = DYNAMIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /****************************** Gadget Bind ******************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int hid_bind(struct usb_composite_dev *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct usb_gadget *gadget = cdev->gadget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct list_head *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct hidg_func_node *n, *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct f_hid_opts *hid_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) int status, funcs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) list_for_each(tmp, &hidg_func_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) funcs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (!funcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) list_for_each_entry(n, &hidg_func_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) n->fi = usb_get_function_instance("hid");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (IS_ERR(n->fi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) status = PTR_ERR(n->fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) hid_opts = container_of(n->fi, struct f_hid_opts, func_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) hid_opts->subclass = n->func->subclass;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) hid_opts->protocol = n->func->protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) hid_opts->report_length = n->func->report_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) hid_opts->report_desc_length = n->func->report_desc_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) hid_opts->report_desc = n->func->report_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* Allocate string descriptor numbers ... note that string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * contents can be overridden by the composite_dev glue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) status = usb_string_ids_tab(cdev, strings_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) goto put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (gadget_is_otg(gadget) && !otg_desc[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct usb_descriptor_header *usb_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) usb_desc = usb_otg_descriptor_alloc(gadget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (!usb_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) goto put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) usb_otg_descriptor_init(gadget, usb_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) otg_desc[0] = usb_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) otg_desc[1] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* register our configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) status = usb_add_config(cdev, &config_driver, do_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto free_otg_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) usb_composite_overwrite_options(cdev, &coverwrite);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) free_otg_desc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) kfree(otg_desc[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) otg_desc[0] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) list_for_each_entry(m, &hidg_func_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (m == n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) usb_put_function_instance(m->fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int hid_unbind(struct usb_composite_dev *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) struct hidg_func_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) list_for_each_entry(n, &hidg_func_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) usb_put_function(n->f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) usb_put_function_instance(n->fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) kfree(otg_desc[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) otg_desc[0] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static int hidg_plat_driver_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct hidg_func_descriptor *func = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct hidg_func_node *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (!func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) dev_err(&pdev->dev, "Platform data missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) entry = kzalloc(sizeof(*entry), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) entry->func = func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) list_add_tail(&entry->node, &hidg_func_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static int hidg_plat_driver_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct hidg_func_node *e, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) list_for_each_entry_safe(e, n, &hidg_func_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) list_del(&e->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) kfree(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /****************************** Some noise ******************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static struct usb_composite_driver hidg_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) .name = "g_hid",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) .dev = &device_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) .strings = dev_strings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) .max_speed = USB_SPEED_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) .bind = hid_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) .unbind = hid_unbind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static struct platform_driver hidg_plat_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) .remove = hidg_plat_driver_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) .name = "hidg",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) MODULE_AUTHOR("Fabien Chouteau, Peter Korsgaard");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static int __init hidg_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) status = platform_driver_probe(&hidg_plat_driver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) hidg_plat_driver_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) status = usb_composite_probe(&hidg_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) platform_driver_unregister(&hidg_plat_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) module_init(hidg_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void __exit hidg_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) usb_composite_unregister(&hidg_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) platform_driver_unregister(&hidg_plat_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) module_exit(hidg_cleanup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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