1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* ZD1211 USB-WLAN driver for Linux
3 *
4 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
5 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
6 */
7
8 #ifndef _ZD_USB_H
9 #define _ZD_USB_H
10
11 #include <linux/completion.h>
12 #include <linux/netdevice.h>
13 #include <linux/spinlock.h>
14 #include <linux/skbuff.h>
15 #include <linux/usb.h>
16
17 #include "zd_def.h"
18
19 #define ZD_USB_TX_HIGH 5
20 #define ZD_USB_TX_LOW 2
21
22 #define ZD_TX_TIMEOUT (HZ * 5)
23 #define ZD_TX_WATCHDOG_INTERVAL round_jiffies_relative(HZ)
24 #define ZD_RX_IDLE_INTERVAL round_jiffies_relative(30 * HZ)
25
26 enum devicetype {
27 DEVICE_ZD1211 = 0,
28 DEVICE_ZD1211B = 1,
29 DEVICE_INSTALLER = 2,
30 };
31
32 enum endpoints {
33 EP_CTRL = 0,
34 EP_DATA_OUT = 1,
35 EP_DATA_IN = 2,
36 EP_INT_IN = 3,
37 EP_REGS_OUT = 4,
38 };
39
40 enum {
41 USB_MAX_TRANSFER_SIZE = 4096, /* bytes */
42 /* FIXME: The original driver uses this value. We have to check,
43 * whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
44 * used if one combined frame is split over two USB transactions.
45 */
46 USB_MAX_RX_SIZE = 4800, /* bytes */
47 USB_MAX_IOWRITE16_COUNT = 15,
48 USB_MAX_IOWRITE32_COUNT = USB_MAX_IOWRITE16_COUNT/2,
49 USB_MAX_IOREAD16_COUNT = 15,
50 USB_MAX_IOREAD32_COUNT = USB_MAX_IOREAD16_COUNT/2,
51 USB_MIN_RFWRITE_BIT_COUNT = 16,
52 USB_MAX_RFWRITE_BIT_COUNT = 28,
53 USB_MAX_EP_INT_BUFFER = 64,
54 USB_ZD1211B_BCD_DEVICE = 0x4810,
55 };
56
57 enum control_requests {
58 USB_REQ_WRITE_REGS = 0x21,
59 USB_REQ_READ_REGS = 0x22,
60 USB_REQ_WRITE_RF = 0x23,
61 USB_REQ_PROG_FLASH = 0x24,
62 USB_REQ_EEPROM_START = 0x0128, /* ? request is a byte */
63 USB_REQ_EEPROM_MID = 0x28,
64 USB_REQ_EEPROM_END = 0x0228, /* ? request is a byte */
65 USB_REQ_FIRMWARE_DOWNLOAD = 0x30,
66 USB_REQ_FIRMWARE_CONFIRM = 0x31,
67 USB_REQ_FIRMWARE_READ_DATA = 0x32,
68 };
69
70 struct usb_req_read_regs {
71 __le16 id;
72 __le16 addr[0];
73 } __packed;
74
75 struct reg_data {
76 __le16 addr;
77 __le16 value;
78 } __packed;
79
80 struct usb_req_write_regs {
81 __le16 id;
82 struct reg_data reg_writes[0];
83 } __packed;
84
85 enum {
86 RF_IF_LE = 0x02,
87 RF_CLK = 0x04,
88 RF_DATA = 0x08,
89 };
90
91 struct usb_req_rfwrite {
92 __le16 id;
93 __le16 value;
94 /* 1: 3683a */
95 /* 2: other (default) */
96 __le16 bits;
97 /* RF2595: 24 */
98 __le16 bit_values[0];
99 /* (ZD_CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
100 } __packed;
101
102 /* USB interrupt */
103
104 enum usb_int_id {
105 USB_INT_TYPE = 0x01,
106 USB_INT_ID_REGS = 0x90,
107 USB_INT_ID_RETRY_FAILED = 0xa0,
108 };
109
110 enum usb_int_flags {
111 USB_INT_READ_REGS_EN = 0x01,
112 };
113
114 struct usb_int_header {
115 u8 type; /* must always be 1 */
116 u8 id;
117 } __packed;
118
119 struct usb_int_regs {
120 struct usb_int_header hdr;
121 struct reg_data regs[0];
122 } __packed;
123
124 struct usb_int_retry_fail {
125 struct usb_int_header hdr;
126 u8 new_rate;
127 u8 _dummy;
128 u8 addr[ETH_ALEN];
129 u8 ibss_wakeup_dest;
130 } __packed;
131
132 struct read_regs_int {
133 struct completion completion;
134 struct usb_req_read_regs *req;
135 unsigned int req_count;
136 /* Stores the USB int structure and contains the USB address of the
137 * first requested register before request.
138 */
139 u8 buffer[USB_MAX_EP_INT_BUFFER];
140 int length;
141 __le16 cr_int_addr;
142 };
143
144 struct zd_ioreq16 {
145 zd_addr_t addr;
146 u16 value;
147 };
148
149 struct zd_ioreq32 {
150 zd_addr_t addr;
151 u32 value;
152 };
153
154 struct zd_usb_interrupt {
155 struct read_regs_int read_regs;
156 spinlock_t lock;
157 struct urb *urb;
158 void *buffer;
159 dma_addr_t buffer_dma;
160 int interval;
161 atomic_t read_regs_enabled;
162 u8 read_regs_int_overridden:1;
163 };
164
get_read_regs(struct zd_usb_interrupt * intr)165 static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
166 {
167 return (struct usb_int_regs *)intr->read_regs.buffer;
168 }
169
170 #define RX_URBS_COUNT 5
171
172 struct zd_usb_rx {
173 spinlock_t lock;
174 struct mutex setup_mutex;
175 struct delayed_work idle_work;
176 struct tasklet_struct reset_timer_tasklet;
177 u8 fragment[2 * USB_MAX_RX_SIZE];
178 unsigned int fragment_length;
179 unsigned int usb_packet_size;
180 struct urb **urbs;
181 int urbs_count;
182 };
183
184 /**
185 * struct zd_usb_tx - structure used for transmitting frames
186 * @enabled: atomic enabled flag, indicates whether tx is enabled
187 * @lock: lock for transmission
188 * @submitted: anchor for URBs sent to device
189 * @submitted_urbs: atomic integer that counts the URBs having sent to the
190 * device, which haven't been completed
191 * @stopped: indicates whether higher level tx queues are stopped
192 */
193 struct zd_usb_tx {
194 atomic_t enabled;
195 spinlock_t lock;
196 struct delayed_work watchdog_work;
197 struct sk_buff_head submitted_skbs;
198 struct usb_anchor submitted;
199 int submitted_urbs;
200 u8 stopped:1, watchdog_enabled:1;
201 };
202
203 /* Contains the usb parts. The structure doesn't require a lock because intf
204 * will not be changed after initialization.
205 */
206 struct zd_usb {
207 struct zd_usb_interrupt intr;
208 struct zd_usb_rx rx;
209 struct zd_usb_tx tx;
210 struct usb_interface *intf;
211 struct usb_anchor submitted_cmds;
212 struct urb *urb_async_waiting;
213 int cmd_error;
214 u8 req_buf[64]; /* zd_usb_iowrite16v needs 62 bytes */
215 u8 is_zd1211b:1, initialized:1, was_running:1, in_async:1;
216 };
217
218 #define zd_usb_dev(usb) (&usb->intf->dev)
219
zd_usb_to_usbdev(struct zd_usb * usb)220 static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb)
221 {
222 return interface_to_usbdev(usb->intf);
223 }
224
zd_intf_to_hw(struct usb_interface * intf)225 static inline struct ieee80211_hw *zd_intf_to_hw(struct usb_interface *intf)
226 {
227 return usb_get_intfdata(intf);
228 }
229
zd_usb_to_hw(struct zd_usb * usb)230 static inline struct ieee80211_hw *zd_usb_to_hw(struct zd_usb *usb)
231 {
232 return zd_intf_to_hw(usb->intf);
233 }
234
235 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
236 struct usb_interface *intf);
237 int zd_usb_init_hw(struct zd_usb *usb);
238 void zd_usb_clear(struct zd_usb *usb);
239
240 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
241
242 void zd_tx_watchdog_enable(struct zd_usb *usb);
243 void zd_tx_watchdog_disable(struct zd_usb *usb);
244
245 int zd_usb_enable_int(struct zd_usb *usb);
246 void zd_usb_disable_int(struct zd_usb *usb);
247
248 int zd_usb_enable_rx(struct zd_usb *usb);
249 void zd_usb_disable_rx(struct zd_usb *usb);
250
251 void zd_usb_reset_rx_idle_timer(struct zd_usb *usb);
252
253 void zd_usb_enable_tx(struct zd_usb *usb);
254 void zd_usb_disable_tx(struct zd_usb *usb);
255
256 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb);
257
258 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
259 const zd_addr_t *addresses, unsigned int count);
260
zd_usb_ioread16(struct zd_usb * usb,u16 * value,const zd_addr_t addr)261 static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
262 const zd_addr_t addr)
263 {
264 return zd_usb_ioread16v(usb, value, &addr, 1);
265 }
266
267 void zd_usb_iowrite16v_async_start(struct zd_usb *usb);
268 int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout);
269 int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
270 unsigned int count);
271 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
272 unsigned int count);
273
274 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits);
275
276 int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len);
277
278 extern struct workqueue_struct *zd_workqueue;
279
280 #endif /* _ZD_USB_H */
281
