diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/usb/kalmia.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/usb/kalmia.c | 382 |
1 files changed, 0 insertions, 382 deletions
diff --git a/ANDROID_3.4.5/drivers/net/usb/kalmia.c b/ANDROID_3.4.5/drivers/net/usb/kalmia.c deleted file mode 100644 index 7562649b..00000000 --- a/ANDROID_3.4.5/drivers/net/usb/kalmia.c +++ /dev/null @@ -1,382 +0,0 @@ -/* - * USB network interface driver for Samsung Kalmia based LTE USB modem like the - * Samsung GT-B3730 and GT-B3710. - * - * Copyright (C) 2011 Marius Bjoernstad Kotsbak <marius@kotsbak.com> - * - * Sponsored by Quicklink Video Distribution Services Ltd. - * - * Based on the cdc_eem module. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/ctype.h> -#include <linux/ethtool.h> -#include <linux/workqueue.h> -#include <linux/mii.h> -#include <linux/usb.h> -#include <linux/crc32.h> -#include <linux/usb/cdc.h> -#include <linux/usb/usbnet.h> -#include <linux/gfp.h> - -/* - * The Samsung Kalmia based LTE USB modems have a CDC ACM port for modem control - * handled by the "option" module and an ethernet data port handled by this - * module. - * - * The stick must first be switched into modem mode by usb_modeswitch - * or similar tool. Then the modem gets sent two initialization packets by - * this module, which gives the MAC address of the device. User space can then - * connect the modem using AT commands through the ACM port and then use - * DHCP on the network interface exposed by this module. Network packets are - * sent to and from the modem in a proprietary format discovered after watching - * the behavior of the windows driver for the modem. - * - * More information about the use of the modem is available in usb_modeswitch - * forum and the project page: - * - * http://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?t=465 - * https://github.com/mkotsbak/Samsung-GT-B3730-linux-driver - */ - -/* #define DEBUG */ -/* #define VERBOSE */ - -#define KALMIA_HEADER_LENGTH 6 -#define KALMIA_ALIGN_SIZE 4 -#define KALMIA_USB_TIMEOUT 10000 - -/*-------------------------------------------------------------------------*/ - -static int -kalmia_send_init_packet(struct usbnet *dev, u8 *init_msg, u8 init_msg_len, - u8 *buffer, u8 expected_len) -{ - int act_len; - int status; - - netdev_dbg(dev->net, "Sending init packet"); - - status = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, 0x02), - init_msg, init_msg_len, &act_len, KALMIA_USB_TIMEOUT); - if (status != 0) { - netdev_err(dev->net, - "Error sending init packet. Status %i, length %i\n", - status, act_len); - return status; - } - else if (act_len != init_msg_len) { - netdev_err(dev->net, - "Did not send all of init packet. Bytes sent: %i", - act_len); - } - else { - netdev_dbg(dev->net, "Successfully sent init packet."); - } - - status = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, 0x81), - buffer, expected_len, &act_len, KALMIA_USB_TIMEOUT); - - if (status != 0) - netdev_err(dev->net, - "Error receiving init result. Status %i, length %i\n", - status, act_len); - else if (act_len != expected_len) - netdev_err(dev->net, "Unexpected init result length: %i\n", - act_len); - - return status; -} - -static int -kalmia_init_and_get_ethernet_addr(struct usbnet *dev, u8 *ethernet_addr) -{ - static const char init_msg_1[] = - { 0x57, 0x50, 0x04, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, - 0x00, 0x00 }; - static const char init_msg_2[] = - { 0x57, 0x50, 0x04, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0xf4, - 0x00, 0x00 }; - static const int buflen = 28; - char *usb_buf; - int status; - - usb_buf = kmalloc(buflen, GFP_DMA | GFP_KERNEL); - if (!usb_buf) - return -ENOMEM; - - memcpy(usb_buf, init_msg_1, 12); - status = kalmia_send_init_packet(dev, usb_buf, sizeof(init_msg_1) - / sizeof(init_msg_1[0]), usb_buf, 24); - if (status != 0) - return status; - - memcpy(usb_buf, init_msg_2, 12); - status = kalmia_send_init_packet(dev, usb_buf, sizeof(init_msg_2) - / sizeof(init_msg_2[0]), usb_buf, 28); - if (status != 0) - return status; - - memcpy(ethernet_addr, usb_buf + 10, ETH_ALEN); - - kfree(usb_buf); - return status; -} - -static int -kalmia_bind(struct usbnet *dev, struct usb_interface *intf) -{ - int status; - u8 ethernet_addr[ETH_ALEN]; - - /* Don't bind to AT command interface */ - if (intf->cur_altsetting->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC) - return -EINVAL; - - dev->in = usb_rcvbulkpipe(dev->udev, 0x81 & USB_ENDPOINT_NUMBER_MASK); - dev->out = usb_sndbulkpipe(dev->udev, 0x02 & USB_ENDPOINT_NUMBER_MASK); - dev->status = NULL; - - dev->net->hard_header_len += KALMIA_HEADER_LENGTH; - dev->hard_mtu = 1400; - dev->rx_urb_size = dev->hard_mtu * 10; // Found as optimal after testing - - status = kalmia_init_and_get_ethernet_addr(dev, ethernet_addr); - - if (status < 0) { - usb_set_intfdata(intf, NULL); - usb_driver_release_interface(driver_of(intf), intf); - return status; - } - - memcpy(dev->net->dev_addr, ethernet_addr, ETH_ALEN); - memcpy(dev->net->perm_addr, ethernet_addr, ETH_ALEN); - - return status; -} - -static struct sk_buff * -kalmia_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) -{ - struct sk_buff *skb2 = NULL; - u16 content_len; - unsigned char *header_start; - unsigned char ether_type_1, ether_type_2; - u8 remainder, padlen = 0; - - if (!skb_cloned(skb)) { - int headroom = skb_headroom(skb); - int tailroom = skb_tailroom(skb); - - if ((tailroom >= KALMIA_ALIGN_SIZE) && (headroom - >= KALMIA_HEADER_LENGTH)) - goto done; - - if ((headroom + tailroom) > (KALMIA_HEADER_LENGTH - + KALMIA_ALIGN_SIZE)) { - skb->data = memmove(skb->head + KALMIA_HEADER_LENGTH, - skb->data, skb->len); - skb_set_tail_pointer(skb, skb->len); - goto done; - } - } - - skb2 = skb_copy_expand(skb, KALMIA_HEADER_LENGTH, - KALMIA_ALIGN_SIZE, flags); - if (!skb2) - return NULL; - - dev_kfree_skb_any(skb); - skb = skb2; - -done: - header_start = skb_push(skb, KALMIA_HEADER_LENGTH); - ether_type_1 = header_start[KALMIA_HEADER_LENGTH + 12]; - ether_type_2 = header_start[KALMIA_HEADER_LENGTH + 13]; - - netdev_dbg(dev->net, "Sending etherType: %02x%02x", ether_type_1, - ether_type_2); - - /* According to empiric data for data packages */ - header_start[0] = 0x57; - header_start[1] = 0x44; - content_len = skb->len - KALMIA_HEADER_LENGTH; - - put_unaligned_le16(content_len, &header_start[2]); - header_start[4] = ether_type_1; - header_start[5] = ether_type_2; - - /* Align to 4 bytes by padding with zeros */ - remainder = skb->len % KALMIA_ALIGN_SIZE; - if (remainder > 0) { - padlen = KALMIA_ALIGN_SIZE - remainder; - memset(skb_put(skb, padlen), 0, padlen); - } - - netdev_dbg( - dev->net, - "Sending package with length %i and padding %i. Header: %02x:%02x:%02x:%02x:%02x:%02x.", - content_len, padlen, header_start[0], header_start[1], - header_start[2], header_start[3], header_start[4], - header_start[5]); - - return skb; -} - -static int -kalmia_rx_fixup(struct usbnet *dev, struct sk_buff *skb) -{ - /* - * Our task here is to strip off framing, leaving skb with one - * data frame for the usbnet framework code to process. - */ - static const u8 HEADER_END_OF_USB_PACKET[] = - { 0x57, 0x5a, 0x00, 0x00, 0x08, 0x00 }; - static const u8 EXPECTED_UNKNOWN_HEADER_1[] = - { 0x57, 0x43, 0x1e, 0x00, 0x15, 0x02 }; - static const u8 EXPECTED_UNKNOWN_HEADER_2[] = - { 0x57, 0x50, 0x0e, 0x00, 0x00, 0x00 }; - int i = 0; - - /* incomplete header? */ - if (skb->len < KALMIA_HEADER_LENGTH) - return 0; - - do { - struct sk_buff *skb2 = NULL; - u8 *header_start; - u16 usb_packet_length, ether_packet_length; - int is_last; - - header_start = skb->data; - - if (unlikely(header_start[0] != 0x57 || header_start[1] != 0x44)) { - if (!memcmp(header_start, EXPECTED_UNKNOWN_HEADER_1, - sizeof(EXPECTED_UNKNOWN_HEADER_1)) || !memcmp( - header_start, EXPECTED_UNKNOWN_HEADER_2, - sizeof(EXPECTED_UNKNOWN_HEADER_2))) { - netdev_dbg( - dev->net, - "Received expected unknown frame header: %02x:%02x:%02x:%02x:%02x:%02x. Package length: %i\n", - header_start[0], header_start[1], - header_start[2], header_start[3], - header_start[4], header_start[5], - skb->len - KALMIA_HEADER_LENGTH); - } - else { - netdev_err( - dev->net, - "Received unknown frame header: %02x:%02x:%02x:%02x:%02x:%02x. Package length: %i\n", - header_start[0], header_start[1], - header_start[2], header_start[3], - header_start[4], header_start[5], - skb->len - KALMIA_HEADER_LENGTH); - return 0; - } - } - else - netdev_dbg( - dev->net, - "Received header: %02x:%02x:%02x:%02x:%02x:%02x. Package length: %i\n", - header_start[0], header_start[1], header_start[2], - header_start[3], header_start[4], header_start[5], - skb->len - KALMIA_HEADER_LENGTH); - - /* subtract start header and end header */ - usb_packet_length = skb->len - (2 * KALMIA_HEADER_LENGTH); - ether_packet_length = get_unaligned_le16(&header_start[2]); - skb_pull(skb, KALMIA_HEADER_LENGTH); - - /* Some small packets misses end marker */ - if (usb_packet_length < ether_packet_length) { - ether_packet_length = usb_packet_length - + KALMIA_HEADER_LENGTH; - is_last = true; - } - else { - netdev_dbg(dev->net, "Correct package length #%i", i - + 1); - - is_last = (memcmp(skb->data + ether_packet_length, - HEADER_END_OF_USB_PACKET, - sizeof(HEADER_END_OF_USB_PACKET)) == 0); - if (!is_last) { - header_start = skb->data + ether_packet_length; - netdev_dbg( - dev->net, - "End header: %02x:%02x:%02x:%02x:%02x:%02x. Package length: %i\n", - header_start[0], header_start[1], - header_start[2], header_start[3], - header_start[4], header_start[5], - skb->len - KALMIA_HEADER_LENGTH); - } - } - - if (is_last) { - skb2 = skb; - } - else { - skb2 = skb_clone(skb, GFP_ATOMIC); - if (unlikely(!skb2)) - return 0; - } - - skb_trim(skb2, ether_packet_length); - - if (is_last) { - return 1; - } - else { - usbnet_skb_return(dev, skb2); - skb_pull(skb, ether_packet_length); - } - - i++; - } - while (skb->len); - - return 1; -} - -static const struct driver_info kalmia_info = { - .description = "Samsung Kalmia LTE USB dongle", - .flags = FLAG_WWAN, - .bind = kalmia_bind, - .rx_fixup = kalmia_rx_fixup, - .tx_fixup = kalmia_tx_fixup -}; - -/*-------------------------------------------------------------------------*/ - -static const struct usb_device_id products[] = { - /* The unswitched USB ID, to get the module auto loaded: */ - { USB_DEVICE(0x04e8, 0x689a) }, - /* The stick swithed into modem (by e.g. usb_modeswitch): */ - { USB_DEVICE(0x04e8, 0x6889), - .driver_info = (unsigned long) &kalmia_info, }, - { /* EMPTY == end of list */} }; -MODULE_DEVICE_TABLE( usb, products); - -static struct usb_driver kalmia_driver = { - .name = "kalmia", - .id_table = products, - .probe = usbnet_probe, - .disconnect = usbnet_disconnect, - .suspend = usbnet_suspend, - .resume = usbnet_resume -}; - -module_usb_driver(kalmia_driver); - -MODULE_AUTHOR("Marius Bjoernstad Kotsbak <marius@kotsbak.com>"); -MODULE_DESCRIPTION("Samsung Kalmia USB network driver"); -MODULE_LICENSE("GPL"); |