1 /* ZD1211 USB-WLAN driver for Linux
3 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
4 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/completion.h>
25 #include <linux/netdevice.h>
26 #include <linux/spinlock.h>
27 #include <linux/skbuff.h>
28 #include <linux/usb.h>
32 #define ZD_USB_TX_HIGH 5
33 #define ZD_USB_TX_LOW 2
35 #define ZD_TX_TIMEOUT (HZ * 5)
36 #define ZD_TX_WATCHDOG_INTERVAL round_jiffies_relative(HZ)
53 USB_MAX_TRANSFER_SIZE
= 4096, /* bytes */
54 /* FIXME: The original driver uses this value. We have to check,
55 * whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
56 * used if one combined frame is split over two USB transactions.
58 USB_MAX_RX_SIZE
= 4800, /* bytes */
59 USB_MAX_IOWRITE16_COUNT
= 15,
60 USB_MAX_IOWRITE32_COUNT
= USB_MAX_IOWRITE16_COUNT
/2,
61 USB_MAX_IOREAD16_COUNT
= 15,
62 USB_MAX_IOREAD32_COUNT
= USB_MAX_IOREAD16_COUNT
/2,
63 USB_MIN_RFWRITE_BIT_COUNT
= 16,
64 USB_MAX_RFWRITE_BIT_COUNT
= 28,
65 USB_MAX_EP_INT_BUFFER
= 64,
66 USB_ZD1211B_BCD_DEVICE
= 0x4810,
69 enum control_requests
{
70 USB_REQ_WRITE_REGS
= 0x21,
71 USB_REQ_READ_REGS
= 0x22,
72 USB_REQ_WRITE_RF
= 0x23,
73 USB_REQ_PROG_FLASH
= 0x24,
74 USB_REQ_EEPROM_START
= 0x0128, /* ? request is a byte */
75 USB_REQ_EEPROM_MID
= 0x28,
76 USB_REQ_EEPROM_END
= 0x0228, /* ? request is a byte */
77 USB_REQ_FIRMWARE_DOWNLOAD
= 0x30,
78 USB_REQ_FIRMWARE_CONFIRM
= 0x31,
79 USB_REQ_FIRMWARE_READ_DATA
= 0x32,
82 struct usb_req_read_regs
{
92 struct usb_req_write_regs
{
94 struct reg_data reg_writes
[0];
103 struct usb_req_rfwrite
{
107 /* 2: other (default) */
110 __le16 bit_values
[0];
111 /* (CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
118 USB_INT_ID_REGS
= 0x90,
119 USB_INT_ID_RETRY_FAILED
= 0xa0,
123 USB_INT_READ_REGS_EN
= 0x01,
126 struct usb_int_header
{
127 u8 type
; /* must always be 1 */
131 struct usb_int_regs
{
132 struct usb_int_header hdr
;
133 struct reg_data regs
[0];
136 struct usb_int_retry_fail
{
137 struct usb_int_header hdr
;
144 struct read_regs_int
{
145 struct completion completion
;
146 /* Stores the USB int structure and contains the USB address of the
147 * first requested register before request.
149 u8 buffer
[USB_MAX_EP_INT_BUFFER
];
164 struct zd_usb_interrupt
{
165 struct read_regs_int read_regs
;
169 dma_addr_t buffer_dma
;
171 u8 read_regs_enabled
:1;
174 static inline struct usb_int_regs
*get_read_regs(struct zd_usb_interrupt
*intr
)
176 return (struct usb_int_regs
*)intr
->read_regs
.buffer
;
179 #define RX_URBS_COUNT 5
183 u8 fragment
[2*USB_MAX_RX_SIZE
];
184 unsigned int fragment_length
;
185 unsigned int usb_packet_size
;
191 * struct zd_usb_tx - structure used for transmitting frames
192 * @enabled: atomic enabled flag, indicates whether tx is enabled
193 * @lock: lock for transmission
194 * @submitted: anchor for URBs sent to device
195 * @submitted_urbs: atomic integer that counts the URBs having sent to the
196 * device, which haven't been completed
197 * @stopped: indicates whether higher level tx queues are stopped
202 struct delayed_work watchdog_work
;
203 struct sk_buff_head submitted_skbs
;
204 struct usb_anchor submitted
;
206 u8 stopped
:1, watchdog_enabled
:1;
209 /* Contains the usb parts. The structure doesn't require a lock because intf
210 * will not be changed after initialization.
213 struct zd_usb_interrupt intr
;
216 struct usb_interface
*intf
;
217 u8 req_buf
[64]; /* zd_usb_iowrite16v needs 62 bytes */
218 u8 is_zd1211b
:1, initialized
:1, was_running
:1;
221 #define zd_usb_dev(usb) (&usb->intf->dev)
223 static inline struct usb_device
*zd_usb_to_usbdev(struct zd_usb
*usb
)
225 return interface_to_usbdev(usb
->intf
);
228 static inline struct ieee80211_hw
*zd_intf_to_hw(struct usb_interface
*intf
)
230 return usb_get_intfdata(intf
);
233 static inline struct ieee80211_hw
*zd_usb_to_hw(struct zd_usb
*usb
)
235 return zd_intf_to_hw(usb
->intf
);
238 void zd_usb_init(struct zd_usb
*usb
, struct ieee80211_hw
*hw
,
239 struct usb_interface
*intf
);
240 int zd_usb_init_hw(struct zd_usb
*usb
);
241 void zd_usb_clear(struct zd_usb
*usb
);
243 int zd_usb_scnprint_id(struct zd_usb
*usb
, char *buffer
, size_t size
);
245 void zd_tx_watchdog_enable(struct zd_usb
*usb
);
246 void zd_tx_watchdog_disable(struct zd_usb
*usb
);
248 int zd_usb_enable_int(struct zd_usb
*usb
);
249 void zd_usb_disable_int(struct zd_usb
*usb
);
251 int zd_usb_enable_rx(struct zd_usb
*usb
);
252 void zd_usb_disable_rx(struct zd_usb
*usb
);
254 void zd_usb_enable_tx(struct zd_usb
*usb
);
255 void zd_usb_disable_tx(struct zd_usb
*usb
);
257 int zd_usb_tx(struct zd_usb
*usb
, struct sk_buff
*skb
);
259 int zd_usb_ioread16v(struct zd_usb
*usb
, u16
*values
,
260 const zd_addr_t
*addresses
, unsigned int count
);
262 static inline int zd_usb_ioread16(struct zd_usb
*usb
, u16
*value
,
263 const zd_addr_t addr
)
265 return zd_usb_ioread16v(usb
, value
, (const zd_addr_t
*)&addr
, 1);
268 int zd_usb_iowrite16v(struct zd_usb
*usb
, const struct zd_ioreq16
*ioreqs
,
271 int zd_usb_rfwrite(struct zd_usb
*usb
, u32 value
, u8 bits
);
273 int zd_usb_read_fw(struct zd_usb
*usb
, zd_addr_t addr
, u8
*data
, u16 len
);
275 extern struct workqueue_struct
*zd_workqueue
;
277 #endif /* _ZD_USB_H */