Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2015-2016 Samsung Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Based on dummy_hcd.c, which is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 2003 David Brownell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Copyright (C) 2003-2005 Alan Stern
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/usb/ch9.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "vudc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define DEV_REQUEST	(USB_TYPE_STANDARD | USB_RECIP_DEVICE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define DEV_INREQUEST	(DEV_REQUEST | USB_DIR_IN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define INTF_REQUEST	(USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define INTF_INREQUEST	(INTF_REQUEST | USB_DIR_IN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define EP_REQUEST	(USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define EP_INREQUEST	(EP_REQUEST | USB_DIR_IN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) static int get_frame_limit(enum usb_device_speed speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	switch (speed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	case USB_SPEED_LOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		return 8 /*bytes*/ * 12 /*packets*/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	case USB_SPEED_FULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		return 64 /*bytes*/ * 19 /*packets*/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	case USB_SPEED_HIGH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		return 512 /*bytes*/ * 13 /*packets*/ * 8 /*uframes*/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	case USB_SPEED_SUPER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		/* Bus speed is 500000 bytes/ms, so use a little less */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		return 490000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		/* error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * handle_control_request() - handles all control transfers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * @udc: pointer to vudc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * @urb: the urb request to handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * @setup: pointer to the setup data for a USB device control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  *	 request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  * @status: pointer to request handling status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  * Return 0 - if the request was handled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  *	  1 - if the request wasn't handles
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  *	  error code on error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * Adapted from drivers/usb/gadget/udc/dummy_hcd.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static int handle_control_request(struct vudc *udc, struct urb *urb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 				  struct usb_ctrlrequest *setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 				  int *status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct vep	*ep2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int		ret_val = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	unsigned int	w_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	unsigned int	w_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	w_index = le16_to_cpu(setup->wIndex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	w_value = le16_to_cpu(setup->wValue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	switch (setup->bRequest) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	case USB_REQ_SET_ADDRESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		if (setup->bRequestType != DEV_REQUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		udc->address = w_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		ret_val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		*status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	case USB_REQ_SET_FEATURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		if (setup->bRequestType == DEV_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			ret_val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 			switch (w_value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			case USB_DEVICE_REMOTE_WAKEUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			case USB_DEVICE_B_HNP_ENABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 				udc->gadget.b_hnp_enable = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			case USB_DEVICE_A_HNP_SUPPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 				udc->gadget.a_hnp_support = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			case USB_DEVICE_A_ALT_HNP_SUPPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 				udc->gadget.a_alt_hnp_support = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 				ret_val = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			if (ret_val == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				udc->devstatus |= (1 << w_value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				*status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		} else if (setup->bRequestType == EP_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			/* endpoint halt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 			ep2 = vudc_find_endpoint(udc, w_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			if (!ep2 || ep2->ep.name == udc->ep[0].ep.name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 				ret_val = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			ep2->halted = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			ret_val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			*status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	case USB_REQ_CLEAR_FEATURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		if (setup->bRequestType == DEV_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			ret_val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			switch (w_value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			case USB_DEVICE_REMOTE_WAKEUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				w_value = USB_DEVICE_REMOTE_WAKEUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			case USB_DEVICE_U1_ENABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			case USB_DEVICE_U2_ENABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			case USB_DEVICE_LTM_ENABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 				ret_val = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 				ret_val = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			if (ret_val == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				udc->devstatus &= ~(1 << w_value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 				*status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		} else if (setup->bRequestType == EP_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			/* endpoint halt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			ep2 = vudc_find_endpoint(udc, w_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			if (!ep2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 				ret_val = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			if (!ep2->wedged)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 				ep2->halted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			ret_val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			*status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	case USB_REQ_GET_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		if (setup->bRequestType == DEV_INREQUEST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				|| setup->bRequestType == INTF_INREQUEST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 				|| setup->bRequestType == EP_INREQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			 * device: remote wakeup, selfpowered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			 * interface: nothing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			 * endpoint: halt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			buf = (char *)urb->transfer_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			if (urb->transfer_buffer_length > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				if (setup->bRequestType == EP_INREQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 					ep2 = vudc_find_endpoint(udc, w_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 					if (!ep2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 						ret_val = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 						break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 					}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 					buf[0] = ep2->halted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 				} else if (setup->bRequestType ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 					   DEV_INREQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 					buf[0] = (u8)udc->devstatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 					buf[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			if (urb->transfer_buffer_length > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				buf[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			urb->actual_length = min_t(u32, 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 				urb->transfer_buffer_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			ret_val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			*status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	return ret_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* Adapted from dummy_hcd.c ; caller must hold lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static int transfer(struct vudc *udc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		struct urb *urb, struct vep *ep, int limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	struct vrequest	*req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	int sent = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) top:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	/* if there's no request queued, the device is NAKing; return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	list_for_each_entry(req, &ep->req_queue, req_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		unsigned int	host_len, dev_len, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		void		*ubuf_pos, *rbuf_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		int		is_short, to_host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		int		rescan = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		 * 1..N packets of ep->ep.maxpacket each ... the last one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		 * may be short (including zero length).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		 * writer can send a zlp explicitly (length 0) or implicitly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		 * (length mod maxpacket zero, and 'zero' flag); they always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		 * terminate reads.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		host_len = urb->transfer_buffer_length - urb->actual_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		dev_len = req->req.length - req->req.actual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		len = min(host_len, dev_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		to_host = usb_pipein(urb->pipe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		if (unlikely(len == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			is_short = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 			/* send multiple of maxpacket first, then remainder */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			if (len >= ep->ep.maxpacket) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 				is_short = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 				if (len % ep->ep.maxpacket > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 					rescan = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				len -= len % ep->ep.maxpacket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 				is_short = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			ubuf_pos = urb->transfer_buffer + urb->actual_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			rbuf_pos = req->req.buf + req->req.actual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			if (urb->pipe & USB_DIR_IN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 				memcpy(ubuf_pos, rbuf_pos, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 				memcpy(rbuf_pos, ubuf_pos, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			urb->actual_length += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			req->req.actual += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			sent += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		 * short packets terminate, maybe with overflow/underflow.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		 * it's only really an error to write too much.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		 * partially filling a buffer optionally blocks queue advances
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		 * (so completion handlers can clean up the queue) but we don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		 * need to emulate such data-in-flight.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		if (is_short) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			if (host_len == dev_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				req->req.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 				urb->status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			} else if (to_host) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 				req->req.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 				if (dev_len > host_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 					urb->status = -EOVERFLOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 				else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 					urb->status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 				urb->status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 				if (host_len > dev_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 					req->req.status = -EOVERFLOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 				else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 					req->req.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		/* many requests terminate without a short packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		/* also check if we need to send zlp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			if (req->req.length == req->req.actual) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 				if (req->req.zero && to_host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 					rescan = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 				else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 					req->req.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			if (urb->transfer_buffer_length == urb->actual_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 				if (urb->transfer_flags & URB_ZERO_PACKET &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 				    !to_host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 					rescan = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 				else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 					urb->status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		/* device side completion --> continuable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		if (req->req.status != -EINPROGRESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 			list_del_init(&req->req_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			spin_unlock(&udc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			usb_gadget_giveback_request(&ep->ep, &req->req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			spin_lock(&udc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			/* requests might have been unlinked... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 			rescan = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		/* host side completion --> terminate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		if (urb->status != -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		/* rescan to continue with any other queued i/o */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		if (rescan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			goto top;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	return sent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static void v_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	struct vudc *udc = from_timer(udc, t, tr_timer.timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	struct transfer_timer *timer = &udc->tr_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	struct urbp *urb_p, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	struct usb_ep *_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	struct vep *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	int total, limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	spin_lock_irqsave(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	total = get_frame_limit(udc->gadget.speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	if (total < 0) {	/* unknown speed, or not set yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		timer->state = VUDC_TR_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	/* is it next frame now? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	if (time_after(jiffies, timer->frame_start + msecs_to_jiffies(1))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		timer->frame_limit = total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		/* FIXME: how to make it accurate? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		timer->frame_start = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		total = timer->frame_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	/* We have to clear ep0 flags separately as it's not on the list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	udc->ep[0].already_seen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	list_for_each_entry(_ep, &udc->gadget.ep_list, ep_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		ep = to_vep(_ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		ep->already_seen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	list_for_each_entry_safe(urb_p, tmp, &udc->urb_queue, urb_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		struct urb *urb = urb_p->urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		ep = urb_p->ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		if (urb->unlinked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 			goto return_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		if (timer->state != VUDC_TR_RUNNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		if (!ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 			urb->status = -EPROTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 			goto return_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		/* Used up bandwidth? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		if (total <= 0 && ep->type == USB_ENDPOINT_XFER_BULK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		if (ep->already_seen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		ep->already_seen = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		if (ep == &udc->ep[0] && urb_p->new) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 			ep->setup_stage = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 			urb_p->new = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		if (ep->halted && !ep->setup_stage) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 			urb->status = -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 			goto return_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		if (ep == &udc->ep[0] && ep->setup_stage) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 			/* TODO - flush any stale requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 			ep->setup_stage = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 			ep->halted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 			ret = handle_control_request(udc, urb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 				(struct usb_ctrlrequest *) urb->setup_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 				(&urb->status));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 			if (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 				spin_unlock(&udc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 				ret = udc->driver->setup(&udc->gadget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 					(struct usb_ctrlrequest *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 					urb->setup_packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 				spin_lock(&udc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 			if (ret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 				/* no delays (max 64kb data stage) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 				limit = 64 * 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 				goto treat_control_like_bulk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 				urb->status = -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 				urb->actual_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 				goto return_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		limit = total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		switch (ep->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		case USB_ENDPOINT_XFER_ISOC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 			/* TODO: support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 			urb->status = -EXDEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		case USB_ENDPOINT_XFER_INT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 			 * TODO: figure out bandwidth guarantees
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 			 * for now, give unlimited bandwidth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 			limit += urb->transfer_buffer_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 			fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) treat_control_like_bulk:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 			total -= transfer(udc, urb, ep, limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		if (urb->status == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) return_urb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 		if (ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 			ep->already_seen = ep->setup_stage = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		spin_lock(&udc->lock_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		list_del(&urb_p->urb_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 		if (!urb->unlinked) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 			v_enqueue_ret_submit(udc, urb_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 			v_enqueue_ret_unlink(udc, urb_p->seqnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 					     urb->unlinked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 			free_urbp_and_urb(urb_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 		wake_up(&udc->tx_waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 		spin_unlock(&udc->lock_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 		goto restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	/* TODO - also wait on empty usb_request queues? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	if (list_empty(&udc->urb_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 		timer->state = VUDC_TR_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 		mod_timer(&timer->timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 			  timer->frame_start + msecs_to_jiffies(1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* All timer functions are run with udc->lock held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) void v_init_timer(struct vudc *udc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	struct transfer_timer *t = &udc->tr_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	timer_setup(&t->timer, v_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	t->state = VUDC_TR_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) void v_start_timer(struct vudc *udc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	struct transfer_timer *t = &udc->tr_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	dev_dbg(&udc->pdev->dev, "timer start");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	switch (t->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	case VUDC_TR_RUNNING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	case VUDC_TR_IDLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 		return v_kick_timer(udc, jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	case VUDC_TR_STOPPED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 		t->state = VUDC_TR_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 		t->frame_start = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 		t->frame_limit = get_frame_limit(udc->gadget.speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 		return v_kick_timer(udc, jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) void v_kick_timer(struct vudc *udc, unsigned long time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	struct transfer_timer *t = &udc->tr_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	dev_dbg(&udc->pdev->dev, "timer kick");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	switch (t->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	case VUDC_TR_RUNNING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	case VUDC_TR_IDLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 		t->state = VUDC_TR_RUNNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	case VUDC_TR_STOPPED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 		/* we may want to kick timer to unqueue urbs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 		mod_timer(&t->timer, time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) void v_stop_timer(struct vudc *udc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 	struct transfer_timer *t = &udc->tr_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	/* timer itself will take care of stopping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 	dev_dbg(&udc->pdev->dev, "timer stop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 	t->state = VUDC_TR_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }