Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * |
| 20 | * File: usbpipe.c |
| 21 | * |
| 22 | * Purpose: Handle USB control endpoint |
| 23 | * |
| 24 | * Author: Warren Hsu |
| 25 | * |
| 26 | * Date: Mar. 29, 2005 |
| 27 | * |
| 28 | * Functions: |
Malcolm Priestley | 1390b02 | 2014-05-26 13:59:01 +0100 | [diff] [blame] | 29 | * vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM |
Malcolm Priestley | 441c21c | 2014-05-26 13:59:02 +0100 | [diff] [blame] | 30 | * vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM |
Malcolm Priestley | 285d58c | 2014-05-26 13:59:03 +0100 | [diff] [blame] | 31 | * vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM |
Malcolm Priestley | 5374290 | 2014-05-26 13:59:06 +0100 | [diff] [blame] | 32 | * vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 33 | * |
| 34 | * Revision History: |
| 35 | * 04-05-2004 Jerry Chen: Initial release |
| 36 | * 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,ControlvMaskByte |
| 37 | * |
| 38 | */ |
| 39 | |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 40 | #include "int.h" |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 41 | #include "rxtx.h" |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 42 | #include "dpc.h" |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 43 | #include "desc.h" |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 44 | #include "device.h" |
Malcolm Priestley | 62c8526 | 2014-05-26 13:59:07 +0100 | [diff] [blame] | 45 | #include "usbpipe.h" |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 46 | |
Malcolm Priestley | b243517 | 2014-07-21 22:40:47 +0100 | [diff] [blame] | 47 | #define USB_CTL_WAIT 500 /* ms */ |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 48 | |
Malcolm Priestley | 1390b02 | 2014-05-26 13:59:01 +0100 | [diff] [blame] | 49 | int vnt_control_out(struct vnt_private *priv, u8 request, u16 value, |
Malcolm Priestley | 0f06a73 | 2014-05-17 09:50:21 +0100 | [diff] [blame] | 50 | u16 index, u16 length, u8 *buffer) |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 51 | { |
Malcolm Priestley | 0f06a73 | 2014-05-17 09:50:21 +0100 | [diff] [blame] | 52 | int status = 0; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 53 | |
Malcolm Priestley | cbcc9a3 | 2014-07-24 21:13:20 +0100 | [diff] [blame] | 54 | if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) |
Malcolm Priestley | e1feda1 | 2013-10-14 19:44:13 +0100 | [diff] [blame] | 55 | return STATUS_FAILURE; |
| 56 | |
Malcolm Priestley | 0f06a73 | 2014-05-17 09:50:21 +0100 | [diff] [blame] | 57 | mutex_lock(&priv->usb_lock); |
Malcolm Priestley | c91b186 | 2014-05-15 22:49:19 +0100 | [diff] [blame] | 58 | |
Malcolm Priestley | 0f06a73 | 2014-05-17 09:50:21 +0100 | [diff] [blame] | 59 | status = usb_control_msg(priv->usb, |
| 60 | usb_sndctrlpipe(priv->usb, 0), request, 0x40, value, |
| 61 | index, buffer, length, USB_CTL_WAIT); |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 62 | |
Malcolm Priestley | 0f06a73 | 2014-05-17 09:50:21 +0100 | [diff] [blame] | 63 | mutex_unlock(&priv->usb_lock); |
Malcolm Priestley | c91b186 | 2014-05-15 22:49:19 +0100 | [diff] [blame] | 64 | |
Malcolm Priestley | 0f06a73 | 2014-05-17 09:50:21 +0100 | [diff] [blame] | 65 | if (status < (int)length) |
Malcolm Priestley | 7021b68 | 2014-05-15 22:49:22 +0100 | [diff] [blame] | 66 | return STATUS_FAILURE; |
| 67 | |
| 68 | return STATUS_SUCCESS; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 69 | } |
| 70 | |
Malcolm Priestley | 285d58c | 2014-05-26 13:59:03 +0100 | [diff] [blame] | 71 | void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data) |
| 72 | { |
| 73 | vnt_control_out(priv, MESSAGE_TYPE_WRITE, |
| 74 | reg_off, reg, sizeof(u8), &data); |
| 75 | } |
| 76 | |
Malcolm Priestley | 441c21c | 2014-05-26 13:59:02 +0100 | [diff] [blame] | 77 | int vnt_control_in(struct vnt_private *priv, u8 request, u16 value, |
Malcolm Priestley | 9af49fd | 2014-05-17 09:50:22 +0100 | [diff] [blame] | 78 | u16 index, u16 length, u8 *buffer) |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 79 | { |
Malcolm Priestley | 9af49fd | 2014-05-17 09:50:22 +0100 | [diff] [blame] | 80 | int status; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 81 | |
Malcolm Priestley | cbcc9a3 | 2014-07-24 21:13:20 +0100 | [diff] [blame] | 82 | if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) |
Malcolm Priestley | e1feda1 | 2013-10-14 19:44:13 +0100 | [diff] [blame] | 83 | return STATUS_FAILURE; |
| 84 | |
Malcolm Priestley | 9af49fd | 2014-05-17 09:50:22 +0100 | [diff] [blame] | 85 | mutex_lock(&priv->usb_lock); |
Malcolm Priestley | c91b186 | 2014-05-15 22:49:19 +0100 | [diff] [blame] | 86 | |
Malcolm Priestley | 9af49fd | 2014-05-17 09:50:22 +0100 | [diff] [blame] | 87 | status = usb_control_msg(priv->usb, |
| 88 | usb_rcvctrlpipe(priv->usb, 0), request, 0xc0, value, |
| 89 | index, buffer, length, USB_CTL_WAIT); |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 90 | |
Malcolm Priestley | 9af49fd | 2014-05-17 09:50:22 +0100 | [diff] [blame] | 91 | mutex_unlock(&priv->usb_lock); |
Malcolm Priestley | c91b186 | 2014-05-15 22:49:19 +0100 | [diff] [blame] | 92 | |
Malcolm Priestley | 9af49fd | 2014-05-17 09:50:22 +0100 | [diff] [blame] | 93 | if (status < (int)length) |
Malcolm Priestley | 0fb2af3 | 2014-05-15 22:49:23 +0100 | [diff] [blame] | 94 | return STATUS_FAILURE; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 95 | |
Malcolm Priestley | 0fb2af3 | 2014-05-15 22:49:23 +0100 | [diff] [blame] | 96 | return STATUS_SUCCESS; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 97 | } |
| 98 | |
Malcolm Priestley | 5374290 | 2014-05-26 13:59:06 +0100 | [diff] [blame] | 99 | void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data) |
| 100 | { |
| 101 | vnt_control_in(priv, MESSAGE_TYPE_READ, |
| 102 | reg_off, reg, sizeof(u8), data); |
| 103 | } |
| 104 | |
Malcolm Priestley | 34f98e3 | 2014-07-15 19:54:38 +0100 | [diff] [blame] | 105 | static void vnt_start_interrupt_urb_complete(struct urb *urb) |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 106 | { |
Malcolm Priestley | 599e4b5 | 2014-02-25 20:51:51 +0000 | [diff] [blame] | 107 | struct vnt_private *priv = urb->context; |
Malcolm Priestley | d9ad7a9 | 2014-02-17 21:27:30 +0000 | [diff] [blame] | 108 | int status; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 109 | |
Malcolm Priestley | c98fbf9 | 2014-02-17 21:16:20 +0000 | [diff] [blame] | 110 | switch (urb->status) { |
| 111 | case 0: |
| 112 | case -ETIMEDOUT: |
| 113 | break; |
| 114 | case -ECONNRESET: |
| 115 | case -ENOENT: |
| 116 | case -ESHUTDOWN: |
Malcolm Priestley | f764e00 | 2014-02-19 18:39:09 +0000 | [diff] [blame] | 117 | priv->int_buf.in_use = false; |
Malcolm Priestley | c98fbf9 | 2014-02-17 21:16:20 +0000 | [diff] [blame] | 118 | return; |
| 119 | default: |
| 120 | break; |
| 121 | } |
| 122 | |
Malcolm Priestley | d9ad7a9 | 2014-02-17 21:27:30 +0000 | [diff] [blame] | 123 | status = urb->status; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 124 | |
Malcolm Priestley | d9ad7a9 | 2014-02-17 21:27:30 +0000 | [diff] [blame] | 125 | if (status != STATUS_SUCCESS) { |
Malcolm Priestley | f764e00 | 2014-02-19 18:39:09 +0000 | [diff] [blame] | 126 | priv->int_buf.in_use = false; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 127 | |
Malcolm Priestley | 8a66026 | 2014-05-17 09:50:20 +0100 | [diff] [blame] | 128 | dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status); |
Malcolm Priestley | 247b4b6 | 2014-02-17 21:12:51 +0000 | [diff] [blame] | 129 | } else { |
Malcolm Priestley | e360d2b | 2014-07-15 19:54:34 +0100 | [diff] [blame] | 130 | vnt_int_process_data(priv); |
Malcolm Priestley | 247b4b6 | 2014-02-17 21:12:51 +0000 | [diff] [blame] | 131 | } |
Malcolm Priestley | 749627f | 2014-02-17 21:24:33 +0000 | [diff] [blame] | 132 | |
Malcolm Priestley | 3d58248 | 2014-07-18 06:36:14 +0100 | [diff] [blame] | 133 | status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC); |
Ragnar B. Johannsson | 8614034 | 2014-08-10 22:23:48 +0000 | [diff] [blame] | 134 | if (status) |
Malcolm Priestley | 8a66026 | 2014-05-17 09:50:20 +0100 | [diff] [blame] | 135 | dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status); |
Ragnar B. Johannsson | 8614034 | 2014-08-10 22:23:48 +0000 | [diff] [blame] | 136 | else |
Malcolm Priestley | f764e00 | 2014-02-19 18:39:09 +0000 | [diff] [blame] | 137 | priv->int_buf.in_use = true; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 138 | } |
| 139 | |
Malcolm Priestley | eaa5679 | 2014-07-21 22:40:42 +0100 | [diff] [blame] | 140 | int vnt_start_interrupt_urb(struct vnt_private *priv) |
| 141 | { |
| 142 | int status = STATUS_FAILURE; |
| 143 | |
| 144 | if (priv->int_buf.in_use == true) |
| 145 | return STATUS_FAILURE; |
| 146 | |
| 147 | priv->int_buf.in_use = true; |
| 148 | |
| 149 | usb_fill_int_urb(priv->interrupt_urb, |
| 150 | priv->usb, |
| 151 | usb_rcvintpipe(priv->usb, 1), |
| 152 | priv->int_buf.data_buf, |
| 153 | MAX_INTERRUPT_SIZE, |
| 154 | vnt_start_interrupt_urb_complete, |
| 155 | priv, |
| 156 | priv->int_interval); |
| 157 | |
| 158 | status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC); |
| 159 | if (status) { |
| 160 | dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status); |
| 161 | priv->int_buf.in_use = false; |
| 162 | } |
| 163 | |
| 164 | return status; |
| 165 | } |
| 166 | |
Malcolm Priestley | 08823af | 2014-07-15 19:54:42 +0100 | [diff] [blame] | 167 | static void vnt_submit_rx_urb_complete(struct urb *urb) |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 168 | { |
Malcolm Priestley | 599e4b5 | 2014-02-25 20:51:51 +0000 | [diff] [blame] | 169 | struct vnt_rcb *rcb = urb->context; |
Malcolm Priestley | 325de98 | 2014-07-18 06:36:11 +0100 | [diff] [blame] | 170 | struct vnt_private *priv = rcb->priv; |
Malcolm Priestley | 29b0237 | 2014-05-15 22:49:20 +0100 | [diff] [blame] | 171 | unsigned long flags; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 172 | |
Malcolm Priestley | 6763898 | 2014-02-25 20:51:48 +0000 | [diff] [blame] | 173 | switch (urb->status) { |
| 174 | case 0: |
Malcolm Priestley | 6763898 | 2014-02-25 20:51:48 +0000 | [diff] [blame] | 175 | break; |
| 176 | case -ECONNRESET: |
| 177 | case -ENOENT: |
| 178 | case -ESHUTDOWN: |
| 179 | return; |
| 180 | case -ETIMEDOUT: |
| 181 | default: |
Malcolm Priestley | 8a66026 | 2014-05-17 09:50:20 +0100 | [diff] [blame] | 182 | dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status); |
Malcolm Priestley | 6763898 | 2014-02-25 20:51:48 +0000 | [diff] [blame] | 183 | break; |
| 184 | } |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 185 | |
Malcolm Priestley | d4fa2ab | 2014-02-25 20:51:49 +0000 | [diff] [blame] | 186 | if (urb->actual_length) { |
Malcolm Priestley | 29b0237 | 2014-05-15 22:49:20 +0100 | [diff] [blame] | 187 | spin_lock_irqsave(&priv->lock, flags); |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 188 | |
Malcolm Priestley | f528327 | 2014-07-05 19:24:26 +0100 | [diff] [blame] | 189 | if (vnt_rx_data(priv, rcb, urb->actual_length)) { |
| 190 | rcb->skb = dev_alloc_skb(priv->rx_buf_sz); |
| 191 | if (!rcb->skb) { |
| 192 | dev_dbg(&priv->usb->dev, |
| 193 | "Failed to re-alloc rx skb\n"); |
Malcolm Priestley | d4fa2ab | 2014-02-25 20:51:49 +0000 | [diff] [blame] | 194 | |
Malcolm Priestley | 325de98 | 2014-07-18 06:36:11 +0100 | [diff] [blame] | 195 | rcb->in_use = false; |
Malcolm Priestley | f528327 | 2014-07-05 19:24:26 +0100 | [diff] [blame] | 196 | spin_unlock_irqrestore(&priv->lock, flags); |
| 197 | return; |
| 198 | } |
Malcolm Priestley | 618ff9c | 2014-07-06 23:19:46 +0100 | [diff] [blame] | 199 | } else { |
| 200 | skb_push(rcb->skb, skb_headroom(rcb->skb)); |
| 201 | skb_trim(rcb->skb, 0); |
Malcolm Priestley | 8cffb3c | 2014-06-28 23:55:42 +0100 | [diff] [blame] | 202 | } |
Malcolm Priestley | d4fa2ab | 2014-02-25 20:51:49 +0000 | [diff] [blame] | 203 | |
Malcolm Priestley | 8cffb3c | 2014-06-28 23:55:42 +0100 | [diff] [blame] | 204 | urb->transfer_buffer = skb_put(rcb->skb, |
| 205 | skb_tailroom(rcb->skb)); |
Malcolm Priestley | f528327 | 2014-07-05 19:24:26 +0100 | [diff] [blame] | 206 | |
| 207 | spin_unlock_irqrestore(&priv->lock, flags); |
Malcolm Priestley | 8cffb3c | 2014-06-28 23:55:42 +0100 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | if (usb_submit_urb(urb, GFP_ATOMIC)) { |
| 211 | dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n"); |
| 212 | |
Malcolm Priestley | 325de98 | 2014-07-18 06:36:11 +0100 | [diff] [blame] | 213 | rcb->in_use = false; |
Malcolm Priestley | d4fa2ab | 2014-02-25 20:51:49 +0000 | [diff] [blame] | 214 | } |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 215 | } |
| 216 | |
Malcolm Priestley | 93eac3b | 2014-07-21 22:40:43 +0100 | [diff] [blame] | 217 | int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb) |
| 218 | { |
| 219 | int status = 0; |
| 220 | struct urb *urb; |
| 221 | |
| 222 | urb = rcb->urb; |
| 223 | if (rcb->skb == NULL) { |
| 224 | dev_dbg(&priv->usb->dev, "rcb->skb is null\n"); |
| 225 | return status; |
| 226 | } |
| 227 | |
| 228 | usb_fill_bulk_urb(urb, |
| 229 | priv->usb, |
| 230 | usb_rcvbulkpipe(priv->usb, 2), |
| 231 | skb_put(rcb->skb, skb_tailroom(rcb->skb)), |
| 232 | MAX_TOTAL_SIZE_WITH_ALL_HEADERS, |
| 233 | vnt_submit_rx_urb_complete, |
| 234 | rcb); |
| 235 | |
| 236 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 237 | if (status != 0) { |
| 238 | dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status); |
| 239 | return STATUS_FAILURE; |
| 240 | } |
| 241 | |
| 242 | rcb->in_use = true; |
| 243 | |
| 244 | return status; |
| 245 | } |
| 246 | |
Malcolm Priestley | ceebd90 | 2014-07-15 19:54:40 +0100 | [diff] [blame] | 247 | static void vnt_tx_context_complete(struct urb *urb) |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 248 | { |
Malcolm Priestley | 599e4b5 | 2014-02-25 20:51:51 +0000 | [diff] [blame] | 249 | struct vnt_usb_send_context *context = urb->context; |
Malcolm Priestley | 30a05b3 | 2014-05-15 22:49:11 +0100 | [diff] [blame] | 250 | struct vnt_private *priv = context->priv; |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 251 | |
Malcolm Priestley | e8152bf | 2014-02-19 21:53:35 +0000 | [diff] [blame] | 252 | switch (urb->status) { |
| 253 | case 0: |
Malcolm Priestley | 8a66026 | 2014-05-17 09:50:20 +0100 | [diff] [blame] | 254 | dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len); |
Malcolm Priestley | e8152bf | 2014-02-19 21:53:35 +0000 | [diff] [blame] | 255 | break; |
| 256 | case -ECONNRESET: |
| 257 | case -ENOENT: |
| 258 | case -ESHUTDOWN: |
Malcolm Priestley | 30a05b3 | 2014-05-15 22:49:11 +0100 | [diff] [blame] | 259 | context->in_use = false; |
Malcolm Priestley | e8152bf | 2014-02-19 21:53:35 +0000 | [diff] [blame] | 260 | return; |
Malcolm Priestley | d1b2a11 | 2014-02-27 23:06:15 +0000 | [diff] [blame] | 261 | case -ETIMEDOUT: |
Malcolm Priestley | e8152bf | 2014-02-19 21:53:35 +0000 | [diff] [blame] | 262 | default: |
Malcolm Priestley | 8a66026 | 2014-05-17 09:50:20 +0100 | [diff] [blame] | 263 | dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status); |
Malcolm Priestley | e8152bf | 2014-02-19 21:53:35 +0000 | [diff] [blame] | 264 | break; |
| 265 | } |
| 266 | |
Malcolm Priestley | d38b13a | 2014-06-25 21:14:23 +0100 | [diff] [blame] | 267 | if (context->type == CONTEXT_DATA_PACKET) |
| 268 | ieee80211_wake_queues(priv->hw); |
Malcolm Priestley | 21aa212 | 2014-02-19 21:54:45 +0000 | [diff] [blame] | 269 | |
Malcolm Priestley | 71d764a | 2014-07-05 19:24:27 +0100 | [diff] [blame] | 270 | if (urb->status || context->type == CONTEXT_BEACON_PACKET) { |
| 271 | if (context->skb) |
| 272 | ieee80211_free_txskb(priv->hw, context->skb); |
| 273 | |
| 274 | context->in_use = false; |
| 275 | } |
Forest Bond | 92b9679 | 2009-06-13 07:38:31 -0400 | [diff] [blame] | 276 | } |
Malcolm Priestley | 664b044 | 2014-07-21 22:40:44 +0100 | [diff] [blame] | 277 | |
| 278 | int vnt_tx_context(struct vnt_private *priv, |
| 279 | struct vnt_usb_send_context *context) |
| 280 | { |
| 281 | int status; |
| 282 | struct urb *urb; |
| 283 | |
Malcolm Priestley | cbcc9a3 | 2014-07-24 21:13:20 +0100 | [diff] [blame] | 284 | if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) { |
Malcolm Priestley | 664b044 | 2014-07-21 22:40:44 +0100 | [diff] [blame] | 285 | context->in_use = false; |
| 286 | return STATUS_RESOURCES; |
| 287 | } |
| 288 | |
| 289 | urb = context->urb; |
| 290 | |
| 291 | usb_fill_bulk_urb(urb, |
| 292 | priv->usb, |
| 293 | usb_sndbulkpipe(priv->usb, 3), |
| 294 | context->data, |
| 295 | context->buf_len, |
| 296 | vnt_tx_context_complete, |
| 297 | context); |
| 298 | |
| 299 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 300 | if (status != 0) { |
| 301 | dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status); |
| 302 | |
| 303 | context->in_use = false; |
| 304 | return STATUS_FAILURE; |
| 305 | } |
| 306 | |
| 307 | return STATUS_PENDING; |
| 308 | } |