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/* ZD1211 USB-WLAN driver for Linux
*
* Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
* Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _ZD_USB_H
#define _ZD_USB_H
#include <linux/completion.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/usb.h>
#include "zd_def.h"
#define ZD_USB_TX_HIGH 5
#define ZD_USB_TX_LOW 2
#define ZD_TX_TIMEOUT (HZ * 5)
#define ZD_TX_WATCHDOG_INTERVAL round_jiffies_relative(HZ)
#define ZD_RX_IDLE_INTERVAL round_jiffies_relative(30 * HZ)
enum devicetype {
DEVICE_ZD1211 = 0,
DEVICE_ZD1211B = 1,
DEVICE_INSTALLER = 2,
};
enum endpoints {
EP_CTRL = 0,
EP_DATA_OUT = 1,
EP_DATA_IN = 2,
EP_INT_IN = 3,
EP_REGS_OUT = 4,
};
enum {
USB_MAX_TRANSFER_SIZE = 4096, /* bytes */
/* FIXME: The original driver uses this value. We have to check,
* whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
* used if one combined frame is split over two USB transactions.
*/
USB_MAX_RX_SIZE = 4800, /* bytes */
USB_MAX_IOWRITE16_COUNT = 15,
USB_MAX_IOWRITE32_COUNT = USB_MAX_IOWRITE16_COUNT/2,
USB_MAX_IOREAD16_COUNT = 15,
USB_MAX_IOREAD32_COUNT = USB_MAX_IOREAD16_COUNT/2,
USB_MIN_RFWRITE_BIT_COUNT = 16,
USB_MAX_RFWRITE_BIT_COUNT = 28,
USB_MAX_EP_INT_BUFFER = 64,
USB_ZD1211B_BCD_DEVICE = 0x4810,
};
enum control_requests {
USB_REQ_WRITE_REGS = 0x21,
USB_REQ_READ_REGS = 0x22,
USB_REQ_WRITE_RF = 0x23,
USB_REQ_PROG_FLASH = 0x24,
USB_REQ_EEPROM_START = 0x0128, /* ? request is a byte */
USB_REQ_EEPROM_MID = 0x28,
USB_REQ_EEPROM_END = 0x0228, /* ? request is a byte */
USB_REQ_FIRMWARE_DOWNLOAD = 0x30,
USB_REQ_FIRMWARE_CONFIRM = 0x31,
USB_REQ_FIRMWARE_READ_DATA = 0x32,
};
struct usb_req_read_regs {
__le16 id;
__le16 addr[0];
} __packed;
struct reg_data {
__le16 addr;
__le16 value;
} __packed;
struct usb_req_write_regs {
__le16 id;
struct reg_data reg_writes[0];
} __packed;
enum {
RF_IF_LE = 0x02,
RF_CLK = 0x04,
RF_DATA = 0x08,
};
struct usb_req_rfwrite {
__le16 id;
__le16 value;
/* 1: 3683a */
/* 2: other (default) */
__le16 bits;
/* RF2595: 24 */
__le16 bit_values[0];
/* (CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
} __packed;
/* USB interrupt */
enum usb_int_id {
USB_INT_TYPE = 0x01,
USB_INT_ID_REGS = 0x90,
USB_INT_ID_RETRY_FAILED = 0xa0,
};
enum usb_int_flags {
USB_INT_READ_REGS_EN = 0x01,
};
struct usb_int_header {
u8 type; /* must always be 1 */
u8 id;
} __packed;
struct usb_int_regs {
struct usb_int_header hdr;
struct reg_data regs[0];
} __packed;
struct usb_int_retry_fail {
struct usb_int_header hdr;
u8 new_rate;
u8 _dummy;
u8 addr[ETH_ALEN];
u8 ibss_wakeup_dest;
} __packed;
struct read_regs_int {
struct completion completion;
/* Stores the USB int structure and contains the USB address of the
* first requested register before request.
*/
u8 buffer[USB_MAX_EP_INT_BUFFER];
int length;
__le16 cr_int_addr;
};
struct zd_ioreq16 {
zd_addr_t addr;
u16 value;
};
struct zd_ioreq32 {
zd_addr_t addr;
u32 value;
};
struct zd_usb_interrupt {
struct read_regs_int read_regs;
spinlock_t lock;
struct urb *urb;
void *buffer;
dma_addr_t buffer_dma;
int interval;
u8 read_regs_enabled:1;
};
static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
{
return (struct usb_int_regs *)intr->read_regs.buffer;
}
#define RX_URBS_COUNT 5
struct zd_usb_rx {
spinlock_t lock;
struct mutex setup_mutex;
struct delayed_work idle_work;
u8 fragment[2 * USB_MAX_RX_SIZE];
unsigned int fragment_length;
unsigned int usb_packet_size;
struct urb **urbs;
int urbs_count;
};
/**
* struct zd_usb_tx - structure used for transmitting frames
* @enabled: atomic enabled flag, indicates whether tx is enabled
* @lock: lock for transmission
* @submitted: anchor for URBs sent to device
* @submitted_urbs: atomic integer that counts the URBs having sent to the
* device, which haven't been completed
* @stopped: indicates whether higher level tx queues are stopped
*/
struct zd_usb_tx {
atomic_t enabled;
spinlock_t lock;
struct delayed_work watchdog_work;
struct sk_buff_head submitted_skbs;
struct usb_anchor submitted;
int submitted_urbs;
u8 stopped:1, watchdog_enabled:1;
};
/* Contains the usb parts. The structure doesn't require a lock because intf
* will not be changed after initialization.
*/
struct zd_usb {
struct zd_usb_interrupt intr;
struct zd_usb_rx rx;
struct zd_usb_tx tx;
struct usb_interface *intf;
u8 req_buf[64]; /* zd_usb_iowrite16v needs 62 bytes */
u8 is_zd1211b:1, initialized:1, was_running:1;
};
#define zd_usb_dev(usb) (&usb->intf->dev)
static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb)
{
return interface_to_usbdev(usb->intf);
}
static inline struct ieee80211_hw *zd_intf_to_hw(struct usb_interface *intf)
{
return usb_get_intfdata(intf);
}
static inline struct ieee80211_hw *zd_usb_to_hw(struct zd_usb *usb)
{
return zd_intf_to_hw(usb->intf);
}
void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
struct usb_interface *intf);
int zd_usb_init_hw(struct zd_usb *usb);
void zd_usb_clear(struct zd_usb *usb);
int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
void zd_tx_watchdog_enable(struct zd_usb *usb);
void zd_tx_watchdog_disable(struct zd_usb *usb);
int zd_usb_enable_int(struct zd_usb *usb);
void zd_usb_disable_int(struct zd_usb *usb);
int zd_usb_enable_rx(struct zd_usb *usb);
void zd_usb_disable_rx(struct zd_usb *usb);
void zd_usb_reset_rx_idle_timer(struct zd_usb *usb);
void zd_usb_enable_tx(struct zd_usb *usb);
void zd_usb_disable_tx(struct zd_usb *usb);
int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb);
int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
const zd_addr_t *addresses, unsigned int count);
static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
const zd_addr_t addr)
{
return zd_usb_ioread16v(usb, value, (const zd_addr_t *)&addr, 1);
}
int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
unsigned int count);
int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits);
int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len);
extern struct workqueue_struct *zd_workqueue;
#endif /* _ZD_USB_H */
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