2 * carl9170 firmware - used by the ar9170 wireless device
6 * Copyright (c) 2000-2005 ZyDAS Technology Corporation
7 * Copyright (c) 2007-2009 Atheros Communications, Inc.
8 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
31 * NB: The firmware has to write into these structures
32 * so don't try to make them "const".
35 static struct ar9170_usb_config usb_config_highspeed = {
37 .bLength = USB_DT_CONFIG_SIZE,
38 .bDescriptorType = USB_DT_CONFIG,
39 .wTotalLength = cpu_to_le16(sizeof(usb_config_highspeed)),
41 .bConfigurationValue = 1,
43 .bmAttributes = USB_CONFIG_ATT_ONE |
44 #ifdef CONFIG_CARL9170FW_WOL
45 USB_CONFIG_ATT_WAKEUP |
46 #endif /* CONFIG_CARL9170FW_WOL */
48 .bMaxPower = 0xfa, /* 500 mA */
52 .bLength = USB_DT_INTERFACE_SIZE,
53 .bDescriptorType = USB_DT_INTERFACE,
54 .bInterfaceNumber = 0,
55 .bAlternateSetting = 0,
56 .bNumEndpoints = AR9170_USB_NUM_EXTRA_EP,
57 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
58 .bInterfaceSubClass = USB_SUBCLASS_VENDOR_SPEC,
59 .bInterfaceProtocol = 0,
65 .bLength = USB_DT_ENDPOINT_SIZE,
66 .bDescriptorType = USB_DT_ENDPOINT,
67 .bEndpointAddress = USB_DIR_OUT | AR9170_USB_EP_TX,
68 .bmAttributes = USB_ENDPOINT_XFER_BULK,
69 .wMaxPacketSize = cpu_to_le16(512),
74 .bLength = USB_DT_ENDPOINT_SIZE,
75 .bDescriptorType = USB_DT_ENDPOINT,
76 .bEndpointAddress = USB_DIR_IN | AR9170_USB_EP_RX,
77 .bmAttributes = USB_ENDPOINT_XFER_BULK,
78 .wMaxPacketSize = cpu_to_le16(512),
83 .bLength = USB_DT_ENDPOINT_SIZE,
84 .bDescriptorType = USB_DT_ENDPOINT,
85 .bEndpointAddress = USB_DIR_IN | AR9170_USB_EP_IRQ,
86 .bmAttributes = USB_ENDPOINT_XFER_INT,
87 .wMaxPacketSize = cpu_to_le16(64),
92 .bLength = USB_DT_ENDPOINT_SIZE,
93 .bDescriptorType = USB_DT_ENDPOINT,
94 .bEndpointAddress = USB_DIR_OUT | AR9170_USB_EP_CMD,
95 .bmAttributes = USB_ENDPOINT_XFER_INT,
96 .wMaxPacketSize = cpu_to_le16(64),
102 static struct ar9170_usb_config usb_config_fullspeed = {
104 .bLength = USB_DT_CONFIG_SIZE,
105 .bDescriptorType = USB_DT_CONFIG,
106 .wTotalLength = cpu_to_le16(sizeof(usb_config_fullspeed)),
108 .bConfigurationValue = 1,
110 .bmAttributes = USB_CONFIG_ATT_ONE |
111 #ifdef CONFIG_CARL9170FW_WOL
112 USB_CONFIG_ATT_WAKEUP |
113 #endif /* CONFIG_CARL9170FW_WOL */
115 .bMaxPower = 0xfa, /* 500 mA */
119 .bLength = USB_DT_INTERFACE_SIZE,
120 .bDescriptorType = USB_DT_INTERFACE,
121 .bInterfaceNumber = 0,
122 .bAlternateSetting = 0,
123 .bNumEndpoints = AR9170_USB_NUM_EXTRA_EP,
124 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
125 .bInterfaceSubClass = USB_SUBCLASS_VENDOR_SPEC,
126 .bInterfaceProtocol = 0,
132 .bLength = USB_DT_ENDPOINT_SIZE,
133 .bDescriptorType = USB_DT_ENDPOINT,
134 .bEndpointAddress = USB_DIR_OUT | AR9170_USB_EP_TX,
135 .bmAttributes = USB_ENDPOINT_XFER_BULK,
136 .wMaxPacketSize = cpu_to_le16(64),
141 .bLength = USB_DT_ENDPOINT_SIZE,
142 .bDescriptorType = USB_DT_ENDPOINT,
143 .bEndpointAddress = USB_DIR_IN | AR9170_USB_EP_RX,
144 .bmAttributes = USB_ENDPOINT_XFER_BULK,
145 .wMaxPacketSize = cpu_to_le16(64),
150 .bLength = USB_DT_ENDPOINT_SIZE,
151 .bDescriptorType = USB_DT_ENDPOINT,
152 .bEndpointAddress = USB_DIR_IN | AR9170_USB_EP_IRQ,
153 .bmAttributes = USB_ENDPOINT_XFER_INT,
154 .wMaxPacketSize = cpu_to_le16(64),
159 .bLength = USB_DT_ENDPOINT_SIZE,
160 .bDescriptorType = USB_DT_ENDPOINT,
161 .bEndpointAddress = USB_DIR_OUT | AR9170_USB_EP_CMD,
162 .bmAttributes = USB_ENDPOINT_XFER_INT,
163 .wMaxPacketSize = cpu_to_le16(64),
169 void usb_reset_eps(void)
173 /* clear all EPs' toggle bit */
174 for (i = 1; i < __AR9170_USB_NUM_MAX_EP; i++) {
175 usb_set_input_ep_toggle(i);
176 usb_clear_input_ep_toggle(i);
177 usb_clear_input_ep_stall(i);
181 * NB: I've no idea why this cannot be integrated into the
184 for (i = 1; i < __AR9170_USB_NUM_MAX_EP; i++) {
185 usb_set_output_ep_toggle(i);
186 usb_clear_output_ep_toggle(i);
187 usb_clear_output_ep_stall(i);
191 static void usb_pta_init(void)
193 unsigned int usb_dma_ctrl = 0;
194 /* Set PTA mode to USB */
195 andl(AR9170_PTA_REG_DMA_MODE_CTRL,
196 ~AR9170_PTA_DMA_MODE_CTRL_DISABLE_USB);
198 /* Do a software reset to PTA component */
199 orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_RESET);
200 andl(AR9170_PTA_REG_DMA_MODE_CTRL, ~AR9170_PTA_DMA_MODE_CTRL_RESET);
202 if (usb_detect_highspeed()) {
203 fw.usb.os_cfg_desc = &usb_config_fullspeed;
204 fw.usb.cfg_desc = &usb_config_highspeed;
206 /* 512 Byte DMA transfers */
207 usb_dma_ctrl |= AR9170_USB_DMA_CTL_HIGH_SPEED;
209 fw.usb.cfg_desc = &usb_config_fullspeed;
210 fw.usb.os_cfg_desc = &usb_config_highspeed;
213 #ifdef CONFIG_CARL9170FW_USB_UP_STREAM
214 # if (CONFIG_CARL9170FW_RX_FRAME_LEN == 4096)
215 usb_dma_ctrl |= AR9170_USB_DMA_CTL_UP_STREAM_4K;
216 # elif (CONFIG_CARL9170FW_RX_FRAME_LEN == 8192)
217 usb_dma_ctrl |= AR9170_USB_DMA_CTL_UP_STREAM_8K;
218 # elif (CONFIG_CARL9170FW_RX_FRAME_LEN == 16384)
219 usb_dma_ctrl |= AR9170_USB_DMA_CTL_UP_STREAM_16K;
220 # elif (CONFIG_CARL9170FW_RX_FRAME_LEN == 32768)
221 usb_dma_ctrl |= AR9170_USB_DMA_CTL_UP_STREAM_32K;
223 # error "Invalid AR9170_RX_FRAME_LEN setting"
226 #else /* CONFIG_CARL9170FW_USB_UP_STREAM */
227 usb_dma_ctrl |= AR9170_USB_DMA_CTL_UP_PACKET_MODE;
228 #endif /* CONFIG_CARL9170FW_USB_UP_STREAM */
230 #ifdef CONFIG_CARL9170FW_USB_DOWN_STREAM
231 /* Enable down stream mode */
232 usb_dma_ctrl |= AR9170_USB_DMA_CTL_DOWN_STREAM;
233 #endif /* CONFIG_CARL9170FW_USB_DOWN_STREAM */
235 #ifdef CONFIG_CARL9170FW_USB_UP_STREAM
236 /* Set the up stream mode maximum aggregate number */
237 set(AR9170_USB_REG_MAX_AGG_UPLOAD, 4);
240 * Set the up stream mode timeout value.
241 * NB: The vendor driver (otus) set 0x80?
243 set(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
244 #endif /* CONFIG_CARL9170FW_USB_UP_STREAM */
246 /* Enable up stream and down stream */
247 usb_dma_ctrl |= AR9170_USB_DMA_CTL_ENABLE_TO_DEVICE |
248 AR9170_USB_DMA_CTL_ENABLE_FROM_DEVICE;
250 set(AR9170_USB_REG_DMA_CTL, usb_dma_ctrl);
259 * The fw structure is always initialized with "0"
260 * during boot(); No need to waste precious bytes here.
262 * fw.usb.interface_setting = 0;
263 * fw.usb.alternate_interface_setting = 0;
264 * fw.usb.device_feature = 0;
267 #ifdef CONFIG_CARL9170FW_WOL
268 fw.usb.device_feature |= USB_DEVICE_REMOTE_WAKEUP;
269 usb_enable_remote_wakeup();
270 #endif /* CONFIG_CARL9170FW_WOL */
273 #define GET_ARRAY(a, o) ((uint32_t *) (((unsigned long) data) + offset))
275 static void usb_ep0rx_data(const void *data, const unsigned int len)
280 BUG_ON(len > AR9170_USB_EP_CTRL_MAX);
281 BUILD_BUG_ON(len > AR9170_USB_EP_CTRL_MAX);
283 for (offset = 0; offset < ((len + 3) & ~3); offset += 4) {
284 value = get(AR9170_USB_REG_EP0_DATA);
285 memcpy(GET_ARRAY(data, offset), &value,
286 min(len - offset, (unsigned int)4));
290 static int usb_ep0tx_data(const void *data, const unsigned int len)
292 unsigned int offset = 0, block, last_block = 0;
295 BUG_ON(len > AR9170_USB_EP_CTRL_MAX);
296 BUILD_BUG_ON(len > AR9170_USB_EP_CTRL_MAX);
298 block = min(len, (unsigned int) 4);
300 while (offset < len) {
302 if (last_block != block || block < 4)
303 setb(AR9170_USB_REG_FIFO_SIZE, (1 << block) - 1);
305 memcpy(&value, GET_ARRAY(data, offset), block);
307 set(AR9170_USB_REG_EP0_DATA, value);
310 last_block = block = min(len - offset, (unsigned int) 4);
313 setb(AR9170_USB_REG_FIFO_SIZE, 0xf);
315 /* this will push the data to the host */
320 #ifdef CONFIG_CARL9170FW_USB_STANDARD_CMDS
321 static int usb_get_status(const struct usb_ctrlrequest *ctrl)
323 __le16 status = cpu_to_le16(fw.usb.device_feature);
325 if ((ctrl->bRequestType & USB_DIR_MASK) != USB_DIR_IN)
328 switch (ctrl->bRequestType & USB_RECIP_MASK) {
329 case USB_RECIP_DEVICE:
330 status &= cpu_to_le16(~USB_DEVICE_SELF_POWERED);
331 status &= cpu_to_le16(~USB_DEVICE_REMOTE_WAKEUP);
334 case USB_RECIP_INTERFACE:
335 /* USB spec: This is reserved for future use. */
336 status = cpu_to_le16(0);
339 case USB_RECIP_ENDPOINT: {
340 unsigned int ep = le16_to_cpu(ctrl->wIndex) & 0xf;
341 unsigned int dir = le16_to_cpu(ctrl->wIndex) & USB_DIR_MASK;
344 status = !!(getb(AR9170_USB_REG_CX_CONFIG_STATUS) & BIT(2));
348 if (dir == USB_DIR_IN)
349 addr = AR9170_USB_REG_EP_IN_MAX_SIZE_HIGH;
351 addr = AR9170_USB_REG_EP_OUT_MAX_SIZE_HIGH;
356 * AR9170_USB_EP_OUT_STALL == AR9170_USB_EP_IN_STALL
357 * so it doesn't matter which one we use
359 status = !!(getb(addr) & AR9170_USB_EP_OUT_STALL);
363 case USB_RECIP_OTHER:
368 return usb_ep0tx_data((const void *) &status, sizeof(status));
371 static int usb_get_string_desc(const struct usb_ctrlrequest *ctrl)
373 const struct usb_string_descriptor *string_desc = NULL;
375 switch (le16_to_cpu(ctrl->wValue) & 0xff) {
377 string_desc = (const struct usb_string_descriptor *)
378 rom.hw.usb.string0_desc;
382 string_desc = (const struct usb_string_descriptor *)
383 rom.hw.usb.string1_desc;
387 string_desc = (const struct usb_string_descriptor *)
388 rom.hw.usb.string2_desc;
392 string_desc = (const struct usb_string_descriptor *)
393 rom.hw.usb.string3_desc;
401 return usb_ep0tx_data(string_desc, string_desc->bLength);
406 static int usb_get_device_desc(const struct usb_ctrlrequest *ctrl __unused)
408 return usb_ep0tx_data(&rom.hw.usb.device_desc,
409 rom.hw.usb.device_desc.bLength);
412 static int usb_get_config_desc(const struct usb_ctrlrequest *ctrl __unused)
414 fw.usb.cfg_desc->cfg.bDescriptorType = USB_DT_CONFIG;
416 return usb_ep0tx_data(fw.usb.cfg_desc,
417 le16_to_cpu(fw.usb.cfg_desc->cfg.wTotalLength));
420 #ifdef CONFIG_CARL9170FW_USB_MODESWITCH
421 static int usb_get_otherspeed_desc(const struct usb_ctrlrequest *ctrl __unused)
424 fw.usb.os_cfg_desc->cfg.bDescriptorType = USB_DT_OTHER_SPEED_CONFIG;
426 return usb_ep0tx_data(fw.usb.os_cfg_desc,
427 le16_to_cpu(fw.usb.os_cfg_desc->cfg.wTotalLength));
429 #endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
431 static int usb_get_qualifier_desc(const struct usb_ctrlrequest *ctrl __unused)
433 struct usb_qualifier_descriptor qual;
436 * The qualifier descriptor shares some structural details
437 * with the main device descriptor.
440 memcpy(&qual, &rom.hw.usb.device_desc, sizeof(qual));
442 /* (Re)-Initialize fields */
443 qual.bDescriptorType = USB_DT_DEVICE_QUALIFIER;
444 qual.bLength = sizeof(qual);
445 qual.bNumConfigurations = rom.hw.usb.device_desc.bNumConfigurations;
448 return usb_ep0tx_data(&qual, qual.bLength);
451 #define USB_CHECK_REQTYPE(ctrl, recip, dir) \
452 (((ctrl->bRequestType & USB_RECIP_MASK) != recip) || \
453 ((ctrl->bRequestType & USB_DIR_MASK) != dir))
455 static int usb_get_descriptor(const struct usb_ctrlrequest *ctrl)
459 if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_DEVICE, USB_DIR_IN))
462 switch (le16_to_cpu(ctrl->wValue) >> 8) {
464 status = usb_get_device_desc(ctrl);
468 status = usb_get_config_desc(ctrl);
472 status = usb_get_string_desc(ctrl);
475 case USB_DT_INTERFACE:
478 case USB_DT_ENDPOINT:
481 case USB_DT_DEVICE_QUALIFIER:
482 status = usb_get_qualifier_desc(ctrl);
485 #ifdef CONFIG_CARL9170FW_USB_MODESWITCH
486 case USB_DT_OTHER_SPEED_CONFIG:
487 status = usb_get_otherspeed_desc(ctrl);
489 #endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
498 static int usb_get_configuration(const struct usb_ctrlrequest *ctrl)
500 if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_DEVICE, USB_DIR_IN))
503 return usb_ep0tx_data(&fw.usb.config, fw.usb.config);
506 static int usb_set_configuration(const struct usb_ctrlrequest *ctrl)
510 if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_DEVICE, USB_DIR_OUT))
513 config = le16_to_cpu(ctrl->wValue);
517 andb(AR9170_USB_REG_DEVICE_ADDRESS,
518 (uint8_t) ~(AR9170_USB_DEVICE_ADDRESS_CONFIGURE));
520 fw.usb.config = config;
522 #ifdef CONFIG_CARL9170FW_USB_MODESWITCH
523 if (usb_detect_highspeed()) {
524 /* High Speed Configuration */
525 usb_init_highspeed_fifo_cfg();
527 /* Full Speed Configuration */
528 usb_init_fullspeed_fifo_cfg();
530 /* usb_pta_init() ? */
532 #endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
535 orb(AR9170_USB_REG_DEVICE_ADDRESS,
536 (AR9170_USB_DEVICE_ADDRESS_CONFIGURE));
538 usb_enable_global_int();
547 static int usb_set_address(const struct usb_ctrlrequest *ctrl)
549 unsigned int address;
551 if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_DEVICE, USB_DIR_OUT))
554 address = le16_to_cpu(ctrl->wValue);
557 * The original firmware used 0x100 (which is, of course,
558 * too big to fit into uint8_t).
559 * However based on the available information (hw.h), BIT(7)
560 * is used as some sort of flag and should not be
561 * part of the device address.
563 if (address >= BIT(7))
566 setb(AR9170_USB_REG_DEVICE_ADDRESS, (uint8_t) address);
570 static int usb_get_interface(const struct usb_ctrlrequest *ctrl)
572 if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_INTERFACE, USB_DIR_IN))
575 if (usb_configured() == false)
578 switch (fw.usb.config) {
586 return usb_ep0tx_data(&fw.usb.alternate_interface_setting, 1);
589 static int usb_manipulate_feature(const struct usb_ctrlrequest *ctrl, bool __unused clear)
591 unsigned int feature;
593 if ((ctrl->bRequestType & USB_DIR_MASK) != USB_DIR_OUT)
596 if (usb_configured() == false)
599 feature = le16_to_cpu(ctrl->wValue);
601 switch (ctrl->bRequestType & USB_RECIP_MASK) {
602 case USB_RECIP_DEVICE: {
603 #ifdef CONFIG_CARL9170FW_WOL
604 if (feature & USB_DEVICE_REMOTE_WAKEUP) {
606 usb_disable_remote_wakeup();
608 usb_enable_remote_wakeup();
610 #endif /* CONFIG_CARL9170FW_WOL */
613 fw.usb.device_feature &= ~feature;
615 fw.usb.device_feature |= feature;
621 case USB_RECIP_ENDPOINT: {
622 unsigned int ep, dir;
624 ep = le16_to_cpu(ctrl->wIndex) & 0xf;
625 dir = le16_to_cpu(ctrl->wIndex) & USB_DIR_MASK;
627 /* According to the spec, EP cannot be stopped this way. */
632 if (dir == USB_DIR_IN)
633 addr = AR9170_USB_REG_EP_IN_MAX_SIZE_HIGH;
635 addr = AR9170_USB_REG_EP_OUT_MAX_SIZE_HIGH;
640 andb(addr, ~AR9170_USB_EP_OUT_STALL);
642 orb(addr, AR9170_USB_EP_OUT_STALL);
647 case USB_RECIP_INTERFACE:
649 * the current USB Specification Revision 2
650 * specifies no interface features.
660 #ifdef CONFIG_CARL9170FW_USB_MODESWITCH
661 static int usb_set_interface(const struct usb_ctrlrequest *ctrl)
663 unsigned int intf, alt_intf;
664 if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_INTERFACE, USB_DIR_OUT))
667 if (usb_configured() == false)
670 intf = le16_to_cpu(ctrl->wIndex);
671 alt_intf = le16_to_cpu(ctrl->wValue);
675 if (alt_intf != fw.usb.cfg_desc->intf.bAlternateSetting)
678 fw.usb.interface_setting = (uint8_t) intf;
679 fw.usb.alternate_interface_setting = (uint8_t) alt_intf;
680 if (usb_detect_highspeed())
681 usb_init_highspeed_fifo_cfg();
683 usb_init_fullspeed_fifo_cfg();
686 usb_enable_global_int();
694 #endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
695 #endif /* CONFIG_CARL9170FW_USB_STANDARD_CMDS */
697 static int usb_standard_command(const struct usb_ctrlrequest *ctrl __unused)
701 #ifdef CONFIG_CARL9170FW_USB_STANDARD_CMDS
702 switch (ctrl->bRequest) {
703 case USB_REQ_GET_STATUS:
704 status = usb_get_status(ctrl);
707 case USB_REQ_CLEAR_FEATURE:
708 case USB_REQ_SET_FEATURE:
709 status = usb_manipulate_feature(ctrl, ctrl->bRequest == USB_REQ_CLEAR_FEATURE);
712 case USB_REQ_SET_ADDRESS:
713 status = usb_set_address(ctrl);
716 case USB_REQ_GET_DESCRIPTOR:
717 status = usb_get_descriptor(ctrl);
720 case USB_REQ_SET_DESCRIPTOR:
723 case USB_REQ_GET_CONFIGURATION:
724 status = usb_get_configuration(ctrl);
727 case USB_REQ_SET_CONFIGURATION:
728 status = usb_set_configuration(ctrl);
731 case USB_REQ_GET_INTERFACE:
732 status = usb_get_interface(ctrl);
735 case USB_REQ_SET_INTERFACE:
736 #ifdef CONFIG_CARL9170FW_USB_MODESWITCH
737 status = usb_set_interface(ctrl);
738 #endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
741 case USB_REQ_SYNCH_FRAME:
748 #endif /* CONFIG_CARL9170FW_USB_STANDARD_CMDS */
753 static int usb_class_command(const struct usb_ctrlrequest *ctrl __unused)
758 static int usb_vendor_command(const struct usb_ctrlrequest *ctrl __unused)
761 * Note: Firmware upload/boot is not implemented.
762 * It's impossible to replace the current image
769 #undef USB_CHECK_TYPE
771 void usb_ep0setup(void)
773 struct usb_ctrlrequest ctrl;
775 usb_ep0rx_data(&ctrl, sizeof(ctrl));
777 switch (ctrl.bRequestType & USB_TYPE_MASK) {
778 case USB_TYPE_STANDARD:
779 status = usb_standard_command(&ctrl);
783 status = usb_class_command(&ctrl);
786 case USB_TYPE_VENDOR:
787 status = usb_vendor_command(&ctrl);
796 fw.usb.ep0_action |= CARL9170_EP0_STALL;
797 #ifdef CONFIG_CARL9170FW_USB_STANDARD_CMDS
799 fw.usb.ep0_action |= CARL9170_EP0_TRIGGER;
800 #endif /* CONFIG_CARL9170FW_USB_STANDARD_CMDS */
805 if (BUG_ON(!fw.usb.ep0_txrx_buffer || !fw.usb.ep0_txrx_len))
808 usb_ep0rx_data(fw.usb.ep0_txrx_buffer, fw.usb.ep0_txrx_len);
809 fw.usb.ep0_txrx_pos = fw.usb.ep0_txrx_len;
814 if (BUG_ON(!fw.usb.ep0_txrx_buffer || !fw.usb.ep0_txrx_len))
817 usb_ep0tx_data(fw.usb.ep0_txrx_buffer, fw.usb.ep0_txrx_len);
818 fw.usb.ep0_txrx_pos = fw.usb.ep0_txrx_len;