1 /* ZD1211 USB-WLAN driver for Linux
2 *
3 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
4 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #ifndef _ZD_USB_H
22 #define _ZD_USB_H
23
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>
29
30 #include "zd_def.h"
31
32 #define ZD_USB_TX_HIGH 5
33 #define ZD_USB_TX_LOW 2
34
35 enum devicetype {
36 DEVICE_ZD1211 = 0,
37 DEVICE_ZD1211B = 1,
38 DEVICE_INSTALLER = 2,
39 };
40
41 enum endpoints {
42 EP_CTRL = 0,
43 EP_DATA_OUT = 1,
44 EP_DATA_IN = 2,
45 EP_INT_IN = 3,
46 EP_REGS_OUT = 4,
47 };
48
49 enum {
50 USB_MAX_TRANSFER_SIZE = 4096, /* bytes */
51 /* FIXME: The original driver uses this value. We have to check,
52 * whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
53 * used if one combined frame is split over two USB transactions.
54 */
55 USB_MAX_RX_SIZE = 4800, /* bytes */
56 USB_MAX_IOWRITE16_COUNT = 15,
57 USB_MAX_IOWRITE32_COUNT = USB_MAX_IOWRITE16_COUNT/2,
58 USB_MAX_IOREAD16_COUNT = 15,
59 USB_MAX_IOREAD32_COUNT = USB_MAX_IOREAD16_COUNT/2,
60 USB_MIN_RFWRITE_BIT_COUNT = 16,
61 USB_MAX_RFWRITE_BIT_COUNT = 28,
62 USB_MAX_EP_INT_BUFFER = 64,
63 USB_ZD1211B_BCD_DEVICE = 0x4810,
64 };
65
66 enum control_requests {
67 USB_REQ_WRITE_REGS = 0x21,
68 USB_REQ_READ_REGS = 0x22,
69 USB_REQ_WRITE_RF = 0x23,
70 USB_REQ_PROG_FLASH = 0x24,
71 USB_REQ_EEPROM_START = 0x0128, /* ? request is a byte */
72 USB_REQ_EEPROM_MID = 0x28,
73 USB_REQ_EEPROM_END = 0x0228, /* ? request is a byte */
74 USB_REQ_FIRMWARE_DOWNLOAD = 0x30,
75 USB_REQ_FIRMWARE_CONFIRM = 0x31,
76 USB_REQ_FIRMWARE_READ_DATA = 0x32,
77 };
78
79 struct usb_req_read_regs {
80 __le16 id;
81 __le16 addr[0];
82 } __attribute__((packed));
83
84 struct reg_data {
85 __le16 addr;
86 __le16 value;
87 } __attribute__((packed));
88
89 struct usb_req_write_regs {
90 __le16 id;
91 struct reg_data reg_writes[0];
92 } __attribute__((packed));
93
94 enum {
95 RF_IF_LE = 0x02,
96 RF_CLK = 0x04,
97 RF_DATA = 0x08,
98 };
99
100 struct usb_req_rfwrite {
101 __le16 id;
102 __le16 value;
103 /* 1: 3683a */
104 /* 2: other (default) */
105 __le16 bits;
106 /* RF2595: 24 */
107 __le16 bit_values[0];
108 /* (CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
109 } __attribute__((packed));
110
111 /* USB interrupt */
112
113 enum usb_int_id {
114 USB_INT_TYPE = 0x01,
115 USB_INT_ID_REGS = 0x90,
116 USB_INT_ID_RETRY_FAILED = 0xa0,
117 };
118
119 enum usb_int_flags {
120 USB_INT_READ_REGS_EN = 0x01,
121 };
122
123 struct usb_int_header {
124 u8 type; /* must always be 1 */
125 u8 id;
126 } __attribute__((packed));
127
128 struct usb_int_regs {
129 struct usb_int_header hdr;
130 struct reg_data regs[0];
131 } __attribute__((packed));
132
133 struct usb_int_retry_fail {
134 struct usb_int_header hdr;
135 u8 new_rate;
136 u8 _dummy;
137 u8 addr[ETH_ALEN];
138 u8 ibss_wakeup_dest;
139 } __attribute__((packed));
140
141 struct read_regs_int {
142 struct completion completion;
143 /* Stores the USB int structure and contains the USB address of the
144 * first requested register before request.
145 */
146 u8 buffer[USB_MAX_EP_INT_BUFFER];
147 int length;
148 __le16 cr_int_addr;
149 };
150
151 struct zd_ioreq16 {
152 zd_addr_t addr;
153 u16 value;
154 };
155
156 struct zd_ioreq32 {
157 zd_addr_t addr;
158 u32 value;
159 };
160
161 struct zd_usb_interrupt {
162 struct read_regs_int read_regs;
163 spinlock_t lock;
164 struct urb *urb;
165 int interval;
166 u8 read_regs_enabled:1;
167 };
168
169 static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
170 {
171 return (struct usb_int_regs *)intr->read_regs.buffer;
172 }
173
174 #define RX_URBS_COUNT 5
175
176 struct zd_usb_rx {
177 spinlock_t lock;
178 u8 fragment[2*USB_MAX_RX_SIZE];
179 unsigned int fragment_length;
180 unsigned int usb_packet_size;
181 struct urb **urbs;
182 int urbs_count;
183 };
184
185 /**
186 * struct zd_usb_tx - structure used for transmitting frames
187 * @lock: lock for transmission
188 * @free_urb_list: list of free URBs, contains all the URBs, which can be used
189 * @submitted_urbs: atomic integer that counts the URBs having sent to the
190 * device, which haven't been completed
191 * @enabled: enabled flag, indicates whether tx is enabled
192 * @stopped: indicates whether higher level tx queues are stopped
193 */
194 struct zd_usb_tx {
195 spinlock_t lock;
196 struct list_head free_urb_list;
197 int submitted_urbs;
198 int enabled;
199 int stopped;
200 };
201
202 /* Contains the usb parts. The structure doesn't require a lock because intf
203 * will not be changed after initialization.
204 */
205 struct zd_usb {
206 struct zd_usb_interrupt intr;
207 struct zd_usb_rx rx;
208 struct zd_usb_tx tx;
209 struct usb_interface *intf;
210 u8 is_zd1211b:1, initialized:1;
211 };
212
213 #define zd_usb_dev(usb) (&usb->intf->dev)
214
215 static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb)
216 {
217 return interface_to_usbdev(usb->intf);
218 }
219
220 static inline struct ieee80211_hw *zd_intf_to_hw(struct usb_interface *intf)
221 {
222 return usb_get_intfdata(intf);
223 }
224
225 static inline struct ieee80211_hw *zd_usb_to_hw(struct zd_usb *usb)
226 {
227 return zd_intf_to_hw(usb->intf);
228 }
229
230 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
231 struct usb_interface *intf);
232 int zd_usb_init_hw(struct zd_usb *usb);
233 void zd_usb_clear(struct zd_usb *usb);
234
235 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
236
237 int zd_usb_enable_int(struct zd_usb *usb);
238 void zd_usb_disable_int(struct zd_usb *usb);
239
240 int zd_usb_enable_rx(struct zd_usb *usb);
241 void zd_usb_disable_rx(struct zd_usb *usb);
242
243 void zd_usb_enable_tx(struct zd_usb *usb);
244 void zd_usb_disable_tx(struct zd_usb *usb);
245
246 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb);
247
248 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
249 const zd_addr_t *addresses, unsigned int count);
250
251 static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
252 const zd_addr_t addr)
253 {
254 return zd_usb_ioread16v(usb, value, (const zd_addr_t *)&addr, 1);
255 }
256
257 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
258 unsigned int count);
259
260 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits);
261
262 int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len);
263
264 extern struct workqueue_struct *zd_workqueue;
265
266 #endif /* _ZD_USB_H */
267
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