1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * u_ether_configfs.h 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Utility definitions for configfs support in USB Ethernet functions 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Copyright (c) 2013 Samsung Electronics Co., Ltd. 8*4882a593Smuzhiyun * http://www.samsung.com 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com> 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #ifndef __U_ETHER_CONFIGFS_H 14*4882a593Smuzhiyun #define __U_ETHER_CONFIGFS_H 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #define USB_ETHERNET_CONFIGFS_ITEM(_f_) \ 17*4882a593Smuzhiyun static void _f_##_attr_release(struct config_item *item) \ 18*4882a593Smuzhiyun { \ 19*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 20*4882a593Smuzhiyun \ 21*4882a593Smuzhiyun usb_put_function_instance(&opts->func_inst); \ 22*4882a593Smuzhiyun } \ 23*4882a593Smuzhiyun \ 24*4882a593Smuzhiyun static struct configfs_item_operations _f_##_item_ops = { \ 25*4882a593Smuzhiyun .release = _f_##_attr_release, \ 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \ 29*4882a593Smuzhiyun static ssize_t _f_##_opts_dev_addr_show(struct config_item *item, \ 30*4882a593Smuzhiyun char *page) \ 31*4882a593Smuzhiyun { \ 32*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 33*4882a593Smuzhiyun int result; \ 34*4882a593Smuzhiyun \ 35*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 36*4882a593Smuzhiyun result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \ 37*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 38*4882a593Smuzhiyun \ 39*4882a593Smuzhiyun return result; \ 40*4882a593Smuzhiyun } \ 41*4882a593Smuzhiyun \ 42*4882a593Smuzhiyun static ssize_t _f_##_opts_dev_addr_store(struct config_item *item, \ 43*4882a593Smuzhiyun const char *page, size_t len)\ 44*4882a593Smuzhiyun { \ 45*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 46*4882a593Smuzhiyun int ret; \ 47*4882a593Smuzhiyun \ 48*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 49*4882a593Smuzhiyun if (opts->refcnt) { \ 50*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 51*4882a593Smuzhiyun return -EBUSY; \ 52*4882a593Smuzhiyun } \ 53*4882a593Smuzhiyun \ 54*4882a593Smuzhiyun ret = gether_set_dev_addr(opts->net, page); \ 55*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 56*4882a593Smuzhiyun if (!ret) \ 57*4882a593Smuzhiyun ret = len; \ 58*4882a593Smuzhiyun return ret; \ 59*4882a593Smuzhiyun } \ 60*4882a593Smuzhiyun \ 61*4882a593Smuzhiyun CONFIGFS_ATTR(_f_##_opts_, dev_addr) 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \ 64*4882a593Smuzhiyun static ssize_t _f_##_opts_host_addr_show(struct config_item *item, \ 65*4882a593Smuzhiyun char *page) \ 66*4882a593Smuzhiyun { \ 67*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 68*4882a593Smuzhiyun int result; \ 69*4882a593Smuzhiyun \ 70*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 71*4882a593Smuzhiyun result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \ 72*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 73*4882a593Smuzhiyun \ 74*4882a593Smuzhiyun return result; \ 75*4882a593Smuzhiyun } \ 76*4882a593Smuzhiyun \ 77*4882a593Smuzhiyun static ssize_t _f_##_opts_host_addr_store(struct config_item *item, \ 78*4882a593Smuzhiyun const char *page, size_t len)\ 79*4882a593Smuzhiyun { \ 80*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 81*4882a593Smuzhiyun int ret; \ 82*4882a593Smuzhiyun \ 83*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 84*4882a593Smuzhiyun if (opts->refcnt) { \ 85*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 86*4882a593Smuzhiyun return -EBUSY; \ 87*4882a593Smuzhiyun } \ 88*4882a593Smuzhiyun \ 89*4882a593Smuzhiyun ret = gether_set_host_addr(opts->net, page); \ 90*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 91*4882a593Smuzhiyun if (!ret) \ 92*4882a593Smuzhiyun ret = len; \ 93*4882a593Smuzhiyun return ret; \ 94*4882a593Smuzhiyun } \ 95*4882a593Smuzhiyun \ 96*4882a593Smuzhiyun CONFIGFS_ATTR(_f_##_opts_, host_addr) 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \ 99*4882a593Smuzhiyun static ssize_t _f_##_opts_qmult_show(struct config_item *item, \ 100*4882a593Smuzhiyun char *page) \ 101*4882a593Smuzhiyun { \ 102*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 103*4882a593Smuzhiyun unsigned qmult; \ 104*4882a593Smuzhiyun \ 105*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 106*4882a593Smuzhiyun qmult = gether_get_qmult(opts->net); \ 107*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 108*4882a593Smuzhiyun return sprintf(page, "%d\n", qmult); \ 109*4882a593Smuzhiyun } \ 110*4882a593Smuzhiyun \ 111*4882a593Smuzhiyun static ssize_t _f_##_opts_qmult_store(struct config_item *item, \ 112*4882a593Smuzhiyun const char *page, size_t len)\ 113*4882a593Smuzhiyun { \ 114*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 115*4882a593Smuzhiyun u8 val; \ 116*4882a593Smuzhiyun int ret; \ 117*4882a593Smuzhiyun \ 118*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 119*4882a593Smuzhiyun if (opts->refcnt) { \ 120*4882a593Smuzhiyun ret = -EBUSY; \ 121*4882a593Smuzhiyun goto out; \ 122*4882a593Smuzhiyun } \ 123*4882a593Smuzhiyun \ 124*4882a593Smuzhiyun ret = kstrtou8(page, 0, &val); \ 125*4882a593Smuzhiyun if (ret) \ 126*4882a593Smuzhiyun goto out; \ 127*4882a593Smuzhiyun \ 128*4882a593Smuzhiyun gether_set_qmult(opts->net, val); \ 129*4882a593Smuzhiyun ret = len; \ 130*4882a593Smuzhiyun out: \ 131*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 132*4882a593Smuzhiyun return ret; \ 133*4882a593Smuzhiyun } \ 134*4882a593Smuzhiyun \ 135*4882a593Smuzhiyun CONFIGFS_ATTR(_f_##_opts_, qmult) 136*4882a593Smuzhiyun 137*4882a593Smuzhiyun #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \ 138*4882a593Smuzhiyun static ssize_t _f_##_opts_ifname_show(struct config_item *item, \ 139*4882a593Smuzhiyun char *page) \ 140*4882a593Smuzhiyun { \ 141*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 142*4882a593Smuzhiyun int ret; \ 143*4882a593Smuzhiyun \ 144*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 145*4882a593Smuzhiyun ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \ 146*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 147*4882a593Smuzhiyun \ 148*4882a593Smuzhiyun return ret; \ 149*4882a593Smuzhiyun } \ 150*4882a593Smuzhiyun \ 151*4882a593Smuzhiyun static ssize_t _f_##_opts_ifname_store(struct config_item *item, \ 152*4882a593Smuzhiyun const char *page, size_t len)\ 153*4882a593Smuzhiyun { \ 154*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 155*4882a593Smuzhiyun int ret = -EBUSY; \ 156*4882a593Smuzhiyun \ 157*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 158*4882a593Smuzhiyun if (!opts->refcnt) \ 159*4882a593Smuzhiyun ret = gether_set_ifname(opts->net, page, len); \ 160*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 161*4882a593Smuzhiyun return ret ?: len; \ 162*4882a593Smuzhiyun } \ 163*4882a593Smuzhiyun \ 164*4882a593Smuzhiyun CONFIGFS_ATTR(_f_##_opts_, ifname) 165*4882a593Smuzhiyun 166*4882a593Smuzhiyun #define USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(_f_, _n_) \ 167*4882a593Smuzhiyun static ssize_t _f_##_opts_##_n_##_show(struct config_item *item,\ 168*4882a593Smuzhiyun char *page) \ 169*4882a593Smuzhiyun { \ 170*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 171*4882a593Smuzhiyun int ret; \ 172*4882a593Smuzhiyun \ 173*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 174*4882a593Smuzhiyun ret = sprintf(page, "%02x\n", opts->_n_); \ 175*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 176*4882a593Smuzhiyun \ 177*4882a593Smuzhiyun return ret; \ 178*4882a593Smuzhiyun } \ 179*4882a593Smuzhiyun \ 180*4882a593Smuzhiyun static ssize_t _f_##_opts_##_n_##_store(struct config_item *item,\ 181*4882a593Smuzhiyun const char *page, \ 182*4882a593Smuzhiyun size_t len) \ 183*4882a593Smuzhiyun { \ 184*4882a593Smuzhiyun struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ 185*4882a593Smuzhiyun int ret = -EINVAL; \ 186*4882a593Smuzhiyun u8 val; \ 187*4882a593Smuzhiyun \ 188*4882a593Smuzhiyun mutex_lock(&opts->lock); \ 189*4882a593Smuzhiyun if (sscanf(page, "%02hhx", &val) > 0) { \ 190*4882a593Smuzhiyun opts->_n_ = val; \ 191*4882a593Smuzhiyun ret = len; \ 192*4882a593Smuzhiyun } \ 193*4882a593Smuzhiyun mutex_unlock(&opts->lock); \ 194*4882a593Smuzhiyun \ 195*4882a593Smuzhiyun return ret; \ 196*4882a593Smuzhiyun } \ 197*4882a593Smuzhiyun \ 198*4882a593Smuzhiyun CONFIGFS_ATTR(_f_##_opts_, _n_) 199*4882a593Smuzhiyun 200*4882a593Smuzhiyun #endif /* __U_ETHER_CONFIGFS_H */ 201