mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 17:26:41 +07:00
3371bb3f7e
Fix typo for the Vendor/Product Id for ST-Ericsson CAIF modems. Discovery is based on fixed USB vendor 0x04cc (ST-Ericsson), product-id 0x230f (NCM). Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
208 lines
5.4 KiB
C
208 lines
5.4 KiB
C
/*
|
|
* CAIF USB handler
|
|
* Copyright (C) ST-Ericsson AB 2011
|
|
* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
|
|
* License terms: GNU General Public License (GPL) version 2
|
|
*
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mii.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/usbnet.h>
|
|
#include <net/netns/generic.h>
|
|
#include <net/caif/caif_dev.h>
|
|
#include <net/caif/caif_layer.h>
|
|
#include <net/caif/cfpkt.h>
|
|
#include <net/caif/cfcnfg.h>
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define CFUSB_PAD_DESCR_SZ 1 /* Alignment descriptor length */
|
|
#define CFUSB_ALIGNMENT 4 /* Number of bytes to align. */
|
|
#define CFUSB_MAX_HEADLEN (CFUSB_PAD_DESCR_SZ + CFUSB_ALIGNMENT-1)
|
|
#define STE_USB_VID 0x04cc /* USB Product ID for ST-Ericsson */
|
|
#define STE_USB_PID_CAIF 0x230f /* Product id for CAIF Modems */
|
|
|
|
struct cfusbl {
|
|
struct cflayer layer;
|
|
u8 tx_eth_hdr[ETH_HLEN];
|
|
};
|
|
|
|
static bool pack_added;
|
|
|
|
static int cfusbl_receive(struct cflayer *layr, struct cfpkt *pkt)
|
|
{
|
|
u8 hpad;
|
|
|
|
/* Remove padding. */
|
|
cfpkt_extr_head(pkt, &hpad, 1);
|
|
cfpkt_extr_head(pkt, NULL, hpad);
|
|
return layr->up->receive(layr->up, pkt);
|
|
}
|
|
|
|
static int cfusbl_transmit(struct cflayer *layr, struct cfpkt *pkt)
|
|
{
|
|
struct caif_payload_info *info;
|
|
u8 hpad;
|
|
u8 zeros[CFUSB_ALIGNMENT];
|
|
struct sk_buff *skb;
|
|
struct cfusbl *usbl = container_of(layr, struct cfusbl, layer);
|
|
|
|
skb = cfpkt_tonative(pkt);
|
|
|
|
skb_reset_network_header(skb);
|
|
skb->protocol = htons(ETH_P_IP);
|
|
|
|
info = cfpkt_info(pkt);
|
|
hpad = (info->hdr_len + CFUSB_PAD_DESCR_SZ) & (CFUSB_ALIGNMENT - 1);
|
|
|
|
if (skb_headroom(skb) < ETH_HLEN + CFUSB_PAD_DESCR_SZ + hpad) {
|
|
pr_warn("Headroom to small\n");
|
|
kfree_skb(skb);
|
|
return -EIO;
|
|
}
|
|
memset(zeros, 0, hpad);
|
|
|
|
cfpkt_add_head(pkt, zeros, hpad);
|
|
cfpkt_add_head(pkt, &hpad, 1);
|
|
cfpkt_add_head(pkt, usbl->tx_eth_hdr, sizeof(usbl->tx_eth_hdr));
|
|
return layr->dn->transmit(layr->dn, pkt);
|
|
}
|
|
|
|
static void cfusbl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
|
|
int phyid)
|
|
{
|
|
if (layr->up && layr->up->ctrlcmd)
|
|
layr->up->ctrlcmd(layr->up, ctrl, layr->id);
|
|
}
|
|
|
|
struct cflayer *cfusbl_create(int phyid, u8 ethaddr[ETH_ALEN],
|
|
u8 braddr[ETH_ALEN])
|
|
{
|
|
struct cfusbl *this = kmalloc(sizeof(struct cfusbl), GFP_ATOMIC);
|
|
|
|
if (!this) {
|
|
pr_warn("Out of memory\n");
|
|
return NULL;
|
|
}
|
|
caif_assert(offsetof(struct cfusbl, layer) == 0);
|
|
|
|
memset(this, 0, sizeof(struct cflayer));
|
|
this->layer.receive = cfusbl_receive;
|
|
this->layer.transmit = cfusbl_transmit;
|
|
this->layer.ctrlcmd = cfusbl_ctrlcmd;
|
|
snprintf(this->layer.name, CAIF_LAYER_NAME_SZ, "usb%d", phyid);
|
|
this->layer.id = phyid;
|
|
|
|
/*
|
|
* Construct TX ethernet header:
|
|
* 0-5 destination address
|
|
* 5-11 source address
|
|
* 12-13 protocol type
|
|
*/
|
|
memcpy(&this->tx_eth_hdr[ETH_ALEN], braddr, ETH_ALEN);
|
|
memcpy(&this->tx_eth_hdr[ETH_ALEN], ethaddr, ETH_ALEN);
|
|
this->tx_eth_hdr[12] = cpu_to_be16(ETH_P_802_EX1) & 0xff;
|
|
this->tx_eth_hdr[13] = (cpu_to_be16(ETH_P_802_EX1) >> 8) & 0xff;
|
|
pr_debug("caif ethernet TX-header dst:%pM src:%pM type:%02x%02x\n",
|
|
this->tx_eth_hdr, this->tx_eth_hdr + ETH_ALEN,
|
|
this->tx_eth_hdr[12], this->tx_eth_hdr[13]);
|
|
|
|
return (struct cflayer *) this;
|
|
}
|
|
|
|
static struct packet_type caif_usb_type __read_mostly = {
|
|
.type = cpu_to_be16(ETH_P_802_EX1),
|
|
};
|
|
|
|
static int cfusbl_device_notify(struct notifier_block *me, unsigned long what,
|
|
void *arg)
|
|
{
|
|
struct net_device *dev = arg;
|
|
struct caif_dev_common common;
|
|
struct cflayer *layer, *link_support;
|
|
struct usbnet *usbnet = netdev_priv(dev);
|
|
struct usb_device *usbdev = usbnet->udev;
|
|
struct ethtool_drvinfo drvinfo;
|
|
|
|
/*
|
|
* Quirks: High-jack ethtool to find if we have a NCM device,
|
|
* and find it's VID/PID.
|
|
*/
|
|
if (dev->ethtool_ops == NULL || dev->ethtool_ops->get_drvinfo == NULL)
|
|
return 0;
|
|
|
|
dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
|
|
if (strncmp(drvinfo.driver, "cdc_ncm", 7) != 0)
|
|
return 0;
|
|
|
|
pr_debug("USB CDC NCM device VID:0x%4x PID:0x%4x\n",
|
|
le16_to_cpu(usbdev->descriptor.idVendor),
|
|
le16_to_cpu(usbdev->descriptor.idProduct));
|
|
|
|
/* Check for VID/PID that supports CAIF */
|
|
if (!(le16_to_cpu(usbdev->descriptor.idVendor) == STE_USB_VID &&
|
|
le16_to_cpu(usbdev->descriptor.idProduct) == STE_USB_PID_CAIF))
|
|
return 0;
|
|
|
|
if (what == NETDEV_UNREGISTER)
|
|
module_put(THIS_MODULE);
|
|
|
|
if (what != NETDEV_REGISTER)
|
|
return 0;
|
|
|
|
__module_get(THIS_MODULE);
|
|
|
|
memset(&common, 0, sizeof(common));
|
|
common.use_frag = false;
|
|
common.use_fcs = false;
|
|
common.use_stx = false;
|
|
common.link_select = CAIF_LINK_HIGH_BANDW;
|
|
common.flowctrl = NULL;
|
|
|
|
link_support = cfusbl_create(dev->ifindex, dev->dev_addr,
|
|
dev->broadcast);
|
|
|
|
if (!link_support)
|
|
return -ENOMEM;
|
|
|
|
if (dev->num_tx_queues > 1)
|
|
pr_warn("USB device uses more than one tx queue\n");
|
|
|
|
caif_enroll_dev(dev, &common, link_support, CFUSB_MAX_HEADLEN,
|
|
&layer, &caif_usb_type.func);
|
|
if (!pack_added)
|
|
dev_add_pack(&caif_usb_type);
|
|
pack_added = true;
|
|
|
|
strncpy(layer->name, dev->name,
|
|
sizeof(layer->name) - 1);
|
|
layer->name[sizeof(layer->name) - 1] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct notifier_block caif_device_notifier = {
|
|
.notifier_call = cfusbl_device_notify,
|
|
.priority = 0,
|
|
};
|
|
|
|
static int __init cfusbl_init(void)
|
|
{
|
|
return register_netdevice_notifier(&caif_device_notifier);
|
|
}
|
|
|
|
static void __exit cfusbl_exit(void)
|
|
{
|
|
unregister_netdevice_notifier(&caif_device_notifier);
|
|
dev_remove_pack(&caif_usb_type);
|
|
}
|
|
|
|
module_init(cfusbl_init);
|
|
module_exit(cfusbl_exit);
|