267 lines
6.5 KiB
C
267 lines
6.5 KiB
C
/* ZD1211 USB-WLAN driver for Linux
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*
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* Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
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* Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _ZD_USB_H
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#define _ZD_USB_H
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#include <linux/completion.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/skbuff.h>
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#include <linux/usb.h>
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#include "zd_def.h"
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#define ZD_USB_TX_HIGH 5
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#define ZD_USB_TX_LOW 2
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enum devicetype {
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DEVICE_ZD1211 = 0,
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DEVICE_ZD1211B = 1,
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DEVICE_INSTALLER = 2,
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};
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enum endpoints {
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EP_CTRL = 0,
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EP_DATA_OUT = 1,
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EP_DATA_IN = 2,
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EP_INT_IN = 3,
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EP_REGS_OUT = 4,
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};
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enum {
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USB_MAX_TRANSFER_SIZE = 4096, /* bytes */
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/* FIXME: The original driver uses this value. We have to check,
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* whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
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* used if one combined frame is split over two USB transactions.
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*/
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USB_MAX_RX_SIZE = 4800, /* bytes */
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USB_MAX_IOWRITE16_COUNT = 15,
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USB_MAX_IOWRITE32_COUNT = USB_MAX_IOWRITE16_COUNT/2,
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USB_MAX_IOREAD16_COUNT = 15,
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USB_MAX_IOREAD32_COUNT = USB_MAX_IOREAD16_COUNT/2,
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USB_MIN_RFWRITE_BIT_COUNT = 16,
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USB_MAX_RFWRITE_BIT_COUNT = 28,
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USB_MAX_EP_INT_BUFFER = 64,
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USB_ZD1211B_BCD_DEVICE = 0x4810,
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};
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enum control_requests {
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USB_REQ_WRITE_REGS = 0x21,
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USB_REQ_READ_REGS = 0x22,
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USB_REQ_WRITE_RF = 0x23,
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USB_REQ_PROG_FLASH = 0x24,
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USB_REQ_EEPROM_START = 0x0128, /* ? request is a byte */
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USB_REQ_EEPROM_MID = 0x28,
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USB_REQ_EEPROM_END = 0x0228, /* ? request is a byte */
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USB_REQ_FIRMWARE_DOWNLOAD = 0x30,
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USB_REQ_FIRMWARE_CONFIRM = 0x31,
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USB_REQ_FIRMWARE_READ_DATA = 0x32,
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};
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struct usb_req_read_regs {
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__le16 id;
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__le16 addr[0];
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} __attribute__((packed));
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struct reg_data {
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__le16 addr;
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__le16 value;
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} __attribute__((packed));
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struct usb_req_write_regs {
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__le16 id;
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struct reg_data reg_writes[0];
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} __attribute__((packed));
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enum {
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RF_IF_LE = 0x02,
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RF_CLK = 0x04,
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RF_DATA = 0x08,
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};
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struct usb_req_rfwrite {
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__le16 id;
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__le16 value;
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/* 1: 3683a */
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/* 2: other (default) */
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__le16 bits;
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/* RF2595: 24 */
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__le16 bit_values[0];
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/* (CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
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} __attribute__((packed));
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/* USB interrupt */
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enum usb_int_id {
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USB_INT_TYPE = 0x01,
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USB_INT_ID_REGS = 0x90,
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USB_INT_ID_RETRY_FAILED = 0xa0,
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};
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enum usb_int_flags {
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USB_INT_READ_REGS_EN = 0x01,
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};
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struct usb_int_header {
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u8 type; /* must always be 1 */
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u8 id;
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} __attribute__((packed));
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struct usb_int_regs {
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struct usb_int_header hdr;
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struct reg_data regs[0];
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} __attribute__((packed));
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struct usb_int_retry_fail {
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struct usb_int_header hdr;
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u8 new_rate;
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u8 _dummy;
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u8 addr[ETH_ALEN];
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u8 ibss_wakeup_dest;
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} __attribute__((packed));
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struct read_regs_int {
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struct completion completion;
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/* Stores the USB int structure and contains the USB address of the
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* first requested register before request.
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*/
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u8 buffer[USB_MAX_EP_INT_BUFFER];
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int length;
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__le16 cr_int_addr;
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};
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struct zd_ioreq16 {
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zd_addr_t addr;
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u16 value;
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};
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struct zd_ioreq32 {
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zd_addr_t addr;
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u32 value;
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};
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struct zd_usb_interrupt {
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struct read_regs_int read_regs;
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spinlock_t lock;
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struct urb *urb;
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int interval;
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u8 read_regs_enabled:1;
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};
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static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
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{
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return (struct usb_int_regs *)intr->read_regs.buffer;
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}
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#define RX_URBS_COUNT 5
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struct zd_usb_rx {
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spinlock_t lock;
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u8 fragment[2*USB_MAX_RX_SIZE];
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unsigned int fragment_length;
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unsigned int usb_packet_size;
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struct urb **urbs;
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int urbs_count;
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};
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/**
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* struct zd_usb_tx - structure used for transmitting frames
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* @lock: lock for transmission
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* @free_urb_list: list of free URBs, contains all the URBs, which can be used
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* @submitted_urbs: atomic integer that counts the URBs having sent to the
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* device, which haven't been completed
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* @enabled: enabled flag, indicates whether tx is enabled
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* @stopped: indicates whether higher level tx queues are stopped
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*/
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struct zd_usb_tx {
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spinlock_t lock;
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struct list_head free_urb_list;
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int submitted_urbs;
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int enabled;
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int stopped;
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};
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/* Contains the usb parts. The structure doesn't require a lock because intf
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* will not be changed after initialization.
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*/
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struct zd_usb {
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struct zd_usb_interrupt intr;
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struct zd_usb_rx rx;
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struct zd_usb_tx tx;
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struct usb_interface *intf;
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u8 is_zd1211b:1, initialized:1;
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};
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#define zd_usb_dev(usb) (&usb->intf->dev)
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static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb)
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{
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return interface_to_usbdev(usb->intf);
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}
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static inline struct ieee80211_hw *zd_intf_to_hw(struct usb_interface *intf)
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{
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return usb_get_intfdata(intf);
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}
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static inline struct ieee80211_hw *zd_usb_to_hw(struct zd_usb *usb)
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{
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return zd_intf_to_hw(usb->intf);
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}
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void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
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struct usb_interface *intf);
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int zd_usb_init_hw(struct zd_usb *usb);
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void zd_usb_clear(struct zd_usb *usb);
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int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
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int zd_usb_enable_int(struct zd_usb *usb);
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void zd_usb_disable_int(struct zd_usb *usb);
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int zd_usb_enable_rx(struct zd_usb *usb);
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void zd_usb_disable_rx(struct zd_usb *usb);
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void zd_usb_enable_tx(struct zd_usb *usb);
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void zd_usb_disable_tx(struct zd_usb *usb);
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int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb);
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int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
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const zd_addr_t *addresses, unsigned int count);
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static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
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const zd_addr_t addr)
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{
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return zd_usb_ioread16v(usb, value, (const zd_addr_t *)&addr, 1);
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}
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int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
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unsigned int count);
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int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits);
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int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len);
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extern struct workqueue_struct *zd_workqueue;
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#endif /* _ZD_USB_H */
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