drivers/net/wireless/zd1211rw/zd_usb.h

   1 /* zd_usb.h: Header for USB interface implemented by ZD1211 chip
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  */
  17
  18 #ifndef _ZD_USB_H
  19 #define _ZD_USB_H
  20
  21 #include <linux/completion.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/usb.h>
  26
  27 #include "zd_def.h"
  28
  29 enum devicetype {
  30         DEVICE_ZD1211  = 0,
  31         DEVICE_ZD1211B = 1,
  32         DEVICE_INSTALLER = 2,
  33 };
  34
  35 enum endpoints {
  36         EP_CTRL     = 0,
  37         EP_DATA_OUT = 1,
  38         EP_DATA_IN  = 2,
  39         EP_INT_IN   = 3,
  40         EP_REGS_OUT = 4,
  41 };
  42
  43 enum {
  44         USB_MAX_TRANSFER_SIZE           = 4096, /* bytes */
  45         /* FIXME: The original driver uses this value. We have to check,
  46          * whether the MAX_TRANSFER_SIZE is sufficient and this needs only be
  47          * used if one combined frame is split over two USB transactions.
  48          */
  49         USB_MAX_RX_SIZE                 = 4800, /* bytes */
  50         USB_MAX_IOWRITE16_COUNT         = 15,
  51         USB_MAX_IOWRITE32_COUNT         = USB_MAX_IOWRITE16_COUNT/2,
  52         USB_MAX_IOREAD16_COUNT          = 15,
  53         USB_MAX_IOREAD32_COUNT          = USB_MAX_IOREAD16_COUNT/2,
  54         USB_MIN_RFWRITE_BIT_COUNT       = 16,
  55         USB_MAX_RFWRITE_BIT_COUNT       = 28,
  56         USB_MAX_EP_INT_BUFFER           = 64,
  57         USB_ZD1211B_BCD_DEVICE          = 0x4810,
  58 };
  59
  60 enum control_requests {
  61         USB_REQ_WRITE_REGS              = 0x21,
  62         USB_REQ_READ_REGS               = 0x22,
  63         USB_REQ_WRITE_RF                = 0x23,
  64         USB_REQ_PROG_FLASH              = 0x24,
  65         USB_REQ_EEPROM_START            = 0x0128, /* ? request is a byte */
  66         USB_REQ_EEPROM_MID              = 0x28,
  67         USB_REQ_EEPROM_END              = 0x0228, /* ? request is a byte */
  68         USB_REQ_FIRMWARE_DOWNLOAD       = 0x30,
  69         USB_REQ_FIRMWARE_CONFIRM        = 0x31,
  70         USB_REQ_FIRMWARE_READ_DATA      = 0x32,
  71 };
  72
  73 struct usb_req_read_regs {
  74         __le16 id;
  75         __le16 addr[0];
  76 } __attribute__((packed));
  77
  78 struct reg_data {
  79         __le16 addr;
  80         __le16 value;
  81 } __attribute__((packed));
  82
  83 struct usb_req_write_regs {
  84         __le16 id;
  85         struct reg_data reg_writes[0];
  86 } __attribute__((packed));
  87
  88 enum {
  89         RF_IF_LE = 0x02,
  90         RF_CLK   = 0x04,
  91         RF_DATA  = 0x08,
  92 };
  93
  94 struct usb_req_rfwrite {
  95         __le16 id;
  96         __le16 value;
  97         /* 1: 3683a */
  98         /* 2: other (default) */
  99         __le16 bits;
 100         /* RF2595: 24 */
 101         __le16 bit_values[0];
 102         /* (CR203 & ~(RF_IF_LE | RF_CLK | RF_DATA)) | (bit ? RF_DATA : 0) */
 103 } __attribute__((packed));
 104
 105 /* USB interrupt */
 106
 107 enum usb_int_id {
 108         USB_INT_TYPE                    = 0x01,
 109         USB_INT_ID_REGS                 = 0x90,
 110         USB_INT_ID_RETRY_FAILED         = 0xa0,
 111 };
 112
 113 enum usb_int_flags {
 114         USB_INT_READ_REGS_EN            = 0x01,
 115 };
 116
 117 struct usb_int_header {
 118         u8 type;        /* must always be 1 */
 119         u8 id;
 120 } __attribute__((packed));
 121
 122 struct usb_int_regs {
 123         struct usb_int_header hdr;
 124         struct reg_data regs[0];
 125 } __attribute__((packed));
 126
 127 struct usb_int_retry_fail {
 128         struct usb_int_header hdr;
 129         u8 new_rate;
 130         u8 _dummy;
 131         u8 addr[ETH_ALEN];
 132         u8 ibss_wakeup_dest;
 133 } __attribute__((packed));
 134
 135 struct read_regs_int {
 136         struct completion completion;
 137         /* Stores the USB int structure and contains the USB address of the
 138          * first requested register before request.
 139          */
 140         u8 buffer[USB_MAX_EP_INT_BUFFER];
 141         int length;
 142         __le16 cr_int_addr;
 143 };
 144
 145 struct zd_ioreq16 {
 146         zd_addr_t addr;
 147         u16 value;
 148 };
 149
 150 struct zd_ioreq32 {
 151         zd_addr_t addr;
 152         u32 value;
 153 };
 154
 155 struct zd_usb_interrupt {
 156         struct read_regs_int read_regs;
 157         spinlock_t lock;
 158         struct urb *urb;
 159         int interval;
 160         u8 read_regs_enabled:1;
 161 };
 162
 163 static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
 164 {
 165         return (struct usb_int_regs *)intr->read_regs.buffer;
 166 }
 167
 168 #define URBS_COUNT 5
 169
 170 struct zd_usb_rx {
 171         spinlock_t lock;
 172         u8 fragment[2*USB_MAX_RX_SIZE];
 173         unsigned int fragment_length;
 174         unsigned int usb_packet_size;
 175         struct urb **urbs;
 176         int urbs_count;
 177 };
 178
 179 struct zd_usb_tx {
 180         spinlock_t lock;
 181 };
 182
 183 /* Contains the usb parts. The structure doesn't require a lock because intf
 184  * will not be changed after initialization.
 185  */
 186 struct zd_usb {
 187         struct zd_usb_interrupt intr;
 188         struct zd_usb_rx rx;
 189         struct zd_usb_tx tx;
 190         struct usb_interface *intf;
 191         u8 is_zd1211b:1, initialized:1;
 192 };
 193
 194 #define zd_usb_dev(usb) (&usb->intf->dev)
 195
 196 static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb)
 197 {
 198         return interface_to_usbdev(usb->intf);
 199 }
 200
 201 static inline struct net_device *zd_intf_to_netdev(struct usb_interface *intf)
 202 {
 203         return usb_get_intfdata(intf);
 204 }
 205
 206 static inline struct net_device *zd_usb_to_netdev(struct zd_usb *usb)
 207 {
 208         return zd_intf_to_netdev(usb->intf);
 209 }
 210
 211 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
 212                  struct usb_interface *intf);
 213 int zd_usb_init_hw(struct zd_usb *usb);
 214 void zd_usb_clear(struct zd_usb *usb);
 215
 216 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
 217
 218 int zd_usb_enable_int(struct zd_usb *usb);
 219 void zd_usb_disable_int(struct zd_usb *usb);
 220
 221 int zd_usb_enable_rx(struct zd_usb *usb);
 222 void zd_usb_disable_rx(struct zd_usb *usb);
 223
 224 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length);
 225
 226 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
 227                  const zd_addr_t *addresses, unsigned int count);
 228
 229 static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
 230                               const zd_addr_t addr)
 231 {
 232         return zd_usb_ioread16v(usb, value, (const zd_addr_t *)&addr, 1);
 233 }
 234
 235 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
 236                       unsigned int count);
 237
 238 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits);
 239
 240 int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len);
 241
 242 extern struct workqueue_struct *zd_workqueue;
 243
 244 #endif /* _ZD_USB_H */