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[]; 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[]; 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[]; 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[]; 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 }; 164 165 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) 219 220 static inline struct usb_device *zd_usb_to_usbdev(struct zd_usb *usb) 221 { 222 return interface_to_usbdev(usb->intf); 223 } 224 225 static inline struct ieee80211_hw *zd_intf_to_hw(struct usb_interface *intf) 226 { 227 return usb_get_intfdata(intf); 228 } 229 230 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); 260 261 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