drivers/net/wireless/zd1211rw/zd_usb.h

   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 #define ZD_TX_TIMEOUT           (HZ * 5)
  36 #define ZD_TX_WATCHDOG_INTERVAL round_jiffies_relative(HZ)
  37 #define ZD_RX_IDLE_INTERVAL     round_jiffies_relative(30 * HZ)
  38
  39 enum devicetype {
  40         DEVICE_ZD1211  = 0,
  41         DEVICE_ZD1211B = 1,
  42         DEVICE_INSTALLER = 2,
  43 };
  44
  45 enum endpoints {
  46         EP_CTRL     = 0,
  47         EP_DATA_OUT = 1,
  48         EP_DATA_IN  = 2,
  49         EP_INT_IN   = 3,
  50         EP_REGS_OUT = 4,
  51 };
  52
  53 enum {
  54         USB_MAX_TRANSFER_SIZE           = 4096, /* bytes */
  55         /* FIXME: The original driver uses this value. We have to check,
  56          * whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
  57          * used if one combined frame is split over two USB transactions.
  58          */
  59         USB_MAX_RX_SIZE                 = 4800, /* bytes */
  60         USB_MAX_IOWRITE16_COUNT         = 15,
  61         USB_MAX_IOWRITE32_COUNT         = USB_MAX_IOWRITE16_COUNT/2,
  62         USB_MAX_IOREAD16_COUNT          = 15,
  63         USB_MAX_IOREAD32_COUNT          = USB_MAX_IOREAD16_COUNT/2,
  64         USB_MIN_RFWRITE_BIT_COUNT       = 16,
  65         USB_MAX_RFWRITE_BIT_COUNT       = 28,
  66         USB_MAX_EP_INT_BUFFER           = 64,
  67         USB_ZD1211B_BCD_DEVICE          = 0x4810,
  68 };
  69
  70 enum control_requests {
  71         USB_REQ_WRITE_REGS              = 0x21,
  72         USB_REQ_READ_REGS               = 0x22,
  73         USB_REQ_WRITE_RF                = 0x23,
  74         USB_REQ_PROG_FLASH              = 0x24,
  75         USB_REQ_EEPROM_START            = 0x0128, /* ? request is a byte */
  76         USB_REQ_EEPROM_MID              = 0x28,
  77         USB_REQ_EEPROM_END              = 0x0228, /* ? request is a byte */
  78         USB_REQ_FIRMWARE_DOWNLOAD       = 0x30,
  79         USB_REQ_FIRMWARE_CONFIRM        = 0x31,
  80         USB_REQ_FIRMWARE_READ_DATA      = 0x32,
  81 };
  82
  83 struct usb_req_read_regs {
  84         __le16 id;
  85         __le16 addr[0];
  86 } __packed;
  87
  88 struct reg_data {
  89         __le16 addr;
  90         __le16 value;
  91 } __packed;
  92
  93 struct usb_req_write_regs {
  94         __le16 id;
  95         struct reg_data reg_writes[0];
  96 } __packed;
  97
  98 enum {
  99         RF_IF_LE = 0x02,
 100         RF_CLK   = 0x04,
 101         RF_DATA  = 0x08,
 102 };
 103
 104 struct usb_req_rfwrite {
 105         __le16 id;
 106         __le16 value;
 107         /* 1: 3683a */
 108         /* 2: other (default) */
 109         __le16 bits;
 110         /* RF2595: 24 */
 111         __le16 bit_values[0];
 112         /* (CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
 113 } __packed;
 114
 115 /* USB interrupt */
 116
 117 enum usb_int_id {
 118         USB_INT_TYPE                    = 0x01,
 119         USB_INT_ID_REGS                 = 0x90,
 120         USB_INT_ID_RETRY_FAILED         = 0xa0,
 121 };
 122
 123 enum usb_int_flags {
 124         USB_INT_READ_REGS_EN            = 0x01,
 125 };
 126
 127 struct usb_int_header {
 128         u8 type;        /* must always be 1 */
 129         u8 id;
 130 } __packed;
 131
 132 struct usb_int_regs {
 133         struct usb_int_header hdr;
 134         struct reg_data regs[0];
 135 } __packed;
 136
 137 struct usb_int_retry_fail {
 138         struct usb_int_header hdr;
 139         u8 new_rate;
 140         u8 _dummy;
 141         u8 addr[ETH_ALEN];
 142         u8 ibss_wakeup_dest;
 143 } __packed;
 144
 145 struct read_regs_int {
 146         struct completion completion;
 147         /* Stores the USB int structure and contains the USB address of the
 148          * first requested register before request.
 149          */
 150         u8 buffer[USB_MAX_EP_INT_BUFFER];
 151         int length;
 152         __le16 cr_int_addr;
 153 };
 154
 155 struct zd_ioreq16 {
 156         zd_addr_t addr;
 157         u16 value;
 158 };
 159
 160 struct zd_ioreq32 {
 161         zd_addr_t addr;
 162         u32 value;
 163 };
 164
 165 struct zd_usb_interrupt {
 166         struct read_regs_int read_regs;
 167         spinlock_t lock;
 168         struct urb *urb;
 169         void *buffer;
 170         dma_addr_t buffer_dma;
 171         int interval;
 172         u8 read_regs_enabled:1;
 173 };
 174
 175 static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
 176 {
 177         return (struct usb_int_regs *)intr->read_regs.buffer;
 178 }
 179
 180 #define RX_URBS_COUNT 5
 181
 182 struct zd_usb_rx {
 183         spinlock_t lock;
 184         struct mutex setup_mutex;
 185         struct delayed_work idle_work;
 186         u8 fragment[2 * USB_MAX_RX_SIZE];
 187         unsigned int fragment_length;
 188         unsigned int usb_packet_size;
 189         struct urb **urbs;
 190         int urbs_count;
 191 };
 192
 193 /**
 194  * struct zd_usb_tx - structure used for transmitting frames
 195  * @enabled: atomic enabled flag, indicates whether tx is enabled
 196  * @lock: lock for transmission
 197  * @submitted: anchor for URBs sent to device
 198  * @submitted_urbs: atomic integer that counts the URBs having sent to the
 199  *      device, which haven't been completed
 200  * @stopped: indicates whether higher level tx queues are stopped
 201  */
 202 struct zd_usb_tx {
 203         atomic_t enabled;
 204         spinlock_t lock;
 205         struct delayed_work watchdog_work;
 206         struct sk_buff_head submitted_skbs;
 207         struct usb_anchor submitted;
 208         int submitted_urbs;
 209         u8 stopped:1, watchdog_enabled:1;
 210 };
 211
 212 /* Contains the usb parts. The structure doesn't require a lock because intf
 213  * will not be changed after initialization.
 214  */
 215 struct zd_usb {
 216         struct zd_usb_interrupt intr;
 217         struct zd_usb_rx rx;
 218         struct zd_usb_tx tx;
 219         struct usb_interface *intf;
 220         struct usb_anchor submitted_cmds;
 221         struct urb *urb_async_waiting;
 222         int cmd_error;
 223         u8 req_buf[64]; /* zd_usb_iowrite16v needs 62 bytes */
 224         u8 is_zd1211b:1, initialized:1, was_running:1, in_async:1;
 225 };
 226
 227 #define zd_usb_dev(usb) (&usb->intf->dev)
 228
 229 static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb)
 230 {
 231         return interface_to_usbdev(usb->intf);
 232 }
 233
 234 static inline struct ieee80211_hw *zd_intf_to_hw(struct usb_interface *intf)
 235 {
 236         return usb_get_intfdata(intf);
 237 }
 238
 239 static inline struct ieee80211_hw *zd_usb_to_hw(struct zd_usb *usb)
 240 {
 241         return zd_intf_to_hw(usb->intf);
 242 }
 243
 244 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
 245                  struct usb_interface *intf);
 246 int zd_usb_init_hw(struct zd_usb *usb);
 247 void zd_usb_clear(struct zd_usb *usb);
 248
 249 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
 250
 251 void zd_tx_watchdog_enable(struct zd_usb *usb);
 252 void zd_tx_watchdog_disable(struct zd_usb *usb);
 253
 254 int zd_usb_enable_int(struct zd_usb *usb);
 255 void zd_usb_disable_int(struct zd_usb *usb);
 256
 257 int zd_usb_enable_rx(struct zd_usb *usb);
 258 void zd_usb_disable_rx(struct zd_usb *usb);
 259
 260 void zd_usb_reset_rx_idle_timer(struct zd_usb *usb);
 261
 262 void zd_usb_enable_tx(struct zd_usb *usb);
 263 void zd_usb_disable_tx(struct zd_usb *usb);
 264
 265 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb);
 266
 267 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
 268                  const zd_addr_t *addresses, unsigned int count);
 269
 270 static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
 271                               const zd_addr_t addr)
 272 {
 273         return zd_usb_ioread16v(usb, value, (const zd_addr_t *)&addr, 1);
 274 }
 275
 276 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
 277                       unsigned int count);
 278
 279 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits);
 280
 281 int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len);
 282
 283 extern struct workqueue_struct *zd_workqueue;
 284
 285 #endif /* _ZD_USB_H */