1 /* 2 * Freescale QUICC Engine USB Host Controller Driver 3 * 4 * Copyright (c) Freescale Semicondutor, Inc. 2006. 5 * Shlomi Gridish <gridish@freescale.com> 6 * Jerry Huang <Chang-Ming.Huang@freescale.com> 7 * Copyright (c) Logic Product Development, Inc. 2007 8 * Peter Barada <peterb@logicpd.com> 9 * Copyright (c) MontaVista Software, Inc. 2008. 10 * Anton Vorontsov <avorontsov@ru.mvista.com> 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2 of the License, or (at your 15 * option) any later version. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/types.h> 20 #include <linux/spinlock.h> 21 #include <linux/errno.h> 22 #include <linux/list.h> 23 #include <linux/usb.h> 24 #include "../core/hcd.h" 25 #include "fhci.h" 26 27 /* maps the hardware error code to the USB error code */ 28 static int status_to_error(u32 status) 29 { 30 if (status == USB_TD_OK) 31 return 0; 32 else if (status & USB_TD_RX_ER_CRC) 33 return -EILSEQ; 34 else if (status & USB_TD_RX_ER_NONOCT) 35 return -EPROTO; 36 else if (status & USB_TD_RX_ER_OVERUN) 37 return -ECOMM; 38 else if (status & USB_TD_RX_ER_BITSTUFF) 39 return -EPROTO; 40 else if (status & USB_TD_RX_ER_PID) 41 return -EILSEQ; 42 else if (status & (USB_TD_TX_ER_NAK | USB_TD_TX_ER_TIMEOUT)) 43 return -ETIMEDOUT; 44 else if (status & USB_TD_TX_ER_STALL) 45 return -EPIPE; 46 else if (status & USB_TD_TX_ER_UNDERUN) 47 return -ENOSR; 48 else if (status & USB_TD_RX_DATA_UNDERUN) 49 return -EREMOTEIO; 50 else if (status & USB_TD_RX_DATA_OVERUN) 51 return -EOVERFLOW; 52 else 53 return -EINVAL; 54 } 55 56 void fhci_add_td_to_frame(struct fhci_time_frame *frame, struct td *td) 57 { 58 list_add_tail(&td->frame_lh, &frame->tds_list); 59 } 60 61 void fhci_add_tds_to_ed(struct ed *ed, struct td **td_list, int number) 62 { 63 int i; 64 65 for (i = 0; i < number; i++) { 66 struct td *td = td_list[i]; 67 list_add_tail(&td->node, &ed->td_list); 68 } 69 if (ed->td_head == NULL) 70 ed->td_head = td_list[0]; 71 } 72 73 static struct td *peek_td_from_ed(struct ed *ed) 74 { 75 struct td *td; 76 77 if (!list_empty(&ed->td_list)) 78 td = list_entry(ed->td_list.next, struct td, node); 79 else 80 td = NULL; 81 82 return td; 83 } 84 85 struct td *fhci_remove_td_from_frame(struct fhci_time_frame *frame) 86 { 87 struct td *td; 88 89 if (!list_empty(&frame->tds_list)) { 90 td = list_entry(frame->tds_list.next, struct td, frame_lh); 91 list_del_init(frame->tds_list.next); 92 } else 93 td = NULL; 94 95 return td; 96 } 97 98 struct td *fhci_peek_td_from_frame(struct fhci_time_frame *frame) 99 { 100 struct td *td; 101 102 if (!list_empty(&frame->tds_list)) 103 td = list_entry(frame->tds_list.next, struct td, frame_lh); 104 else 105 td = NULL; 106 107 return td; 108 } 109 110 struct td *fhci_remove_td_from_ed(struct ed *ed) 111 { 112 struct td *td; 113 114 if (!list_empty(&ed->td_list)) { 115 td = list_entry(ed->td_list.next, struct td, node); 116 list_del_init(ed->td_list.next); 117 118 /* if this TD was the ED's head, find next TD */ 119 if (!list_empty(&ed->td_list)) 120 ed->td_head = list_entry(ed->td_list.next, struct td, 121 node); 122 else 123 ed->td_head = NULL; 124 } else 125 td = NULL; 126 127 return td; 128 } 129 130 struct td *fhci_remove_td_from_done_list(struct fhci_controller_list *p_list) 131 { 132 struct td *td; 133 134 if (!list_empty(&p_list->done_list)) { 135 td = list_entry(p_list->done_list.next, struct td, node); 136 list_del_init(p_list->done_list.next); 137 } else 138 td = NULL; 139 140 return td; 141 } 142 143 void fhci_move_td_from_ed_to_done_list(struct fhci_usb *usb, struct ed *ed) 144 { 145 struct td *td; 146 147 td = ed->td_head; 148 list_del_init(&td->node); 149 150 /* If this TD was the ED's head,find next TD */ 151 if (!list_empty(&ed->td_list)) 152 ed->td_head = list_entry(ed->td_list.next, struct td, node); 153 else { 154 ed->td_head = NULL; 155 ed->state = FHCI_ED_SKIP; 156 } 157 ed->toggle_carry = td->toggle; 158 list_add_tail(&td->node, &usb->hc_list->done_list); 159 if (td->ioc) 160 usb->transfer_confirm(usb->fhci); 161 } 162 163 /* free done FHCI URB resource such as ED and TD */ 164 static void free_urb_priv(struct fhci_hcd *fhci, struct urb *urb) 165 { 166 int i; 167 struct urb_priv *urb_priv = urb->hcpriv; 168 struct ed *ed = urb_priv->ed; 169 170 for (i = 0; i < urb_priv->num_of_tds; i++) { 171 list_del_init(&urb_priv->tds[i]->node); 172 fhci_recycle_empty_td(fhci, urb_priv->tds[i]); 173 } 174 175 /* if this TD was the ED's head,find the next TD */ 176 if (!list_empty(&ed->td_list)) 177 ed->td_head = list_entry(ed->td_list.next, struct td, node); 178 else 179 ed->td_head = NULL; 180 181 kfree(urb_priv->tds); 182 kfree(urb_priv); 183 urb->hcpriv = NULL; 184 185 /* if this TD was the ED's head,find next TD */ 186 if (ed->td_head == NULL) 187 list_del_init(&ed->node); 188 fhci->active_urbs--; 189 } 190 191 /* this routine called to complete and free done URB */ 192 void fhci_urb_complete_free(struct fhci_hcd *fhci, struct urb *urb) 193 { 194 free_urb_priv(fhci, urb); 195 196 if (urb->status == -EINPROGRESS) { 197 if (urb->actual_length != urb->transfer_buffer_length && 198 urb->transfer_flags & URB_SHORT_NOT_OK) 199 urb->status = -EREMOTEIO; 200 else 201 urb->status = 0; 202 } 203 204 usb_hcd_unlink_urb_from_ep(fhci_to_hcd(fhci), urb); 205 206 spin_unlock(&fhci->lock); 207 208 usb_hcd_giveback_urb(fhci_to_hcd(fhci), urb, urb->status); 209 210 spin_lock(&fhci->lock); 211 } 212 213 /* 214 * caculate transfer length/stats and update the urb 215 * Precondition: irqsafe(only for urb-?status locking) 216 */ 217 void fhci_done_td(struct urb *urb, struct td *td) 218 { 219 struct ed *ed = td->ed; 220 u32 cc = td->status; 221 222 /* ISO...drivers see per-TD length/status */ 223 if (ed->mode == FHCI_TF_ISO) { 224 u32 len; 225 if (!(urb->transfer_flags & URB_SHORT_NOT_OK && 226 cc == USB_TD_RX_DATA_UNDERUN)) 227 cc = USB_TD_OK; 228 229 if (usb_pipeout(urb->pipe)) 230 len = urb->iso_frame_desc[td->iso_index].length; 231 else 232 len = td->actual_len; 233 234 urb->actual_length += len; 235 urb->iso_frame_desc[td->iso_index].actual_length = len; 236 urb->iso_frame_desc[td->iso_index].status = 237 status_to_error(cc); 238 } 239 240 /* BULK,INT,CONTROL... drivers see aggregate length/status, 241 * except that "setup" bytes aren't counted and "short" transfers 242 * might not be reported as errors. 243 */ 244 else { 245 if (td->error_cnt >= 3) 246 urb->error_count = 3; 247 248 /* control endpoint only have soft stalls */ 249 250 /* update packet status if needed(short may be ok) */ 251 if (!(urb->transfer_flags & URB_SHORT_NOT_OK) && 252 cc == USB_TD_RX_DATA_UNDERUN) { 253 ed->state = FHCI_ED_OPER; 254 cc = USB_TD_OK; 255 } 256 if (cc != USB_TD_OK) { 257 if (urb->status == -EINPROGRESS) 258 urb->status = status_to_error(cc); 259 } 260 261 /* count all non-empty packets except control SETUP packet */ 262 if (td->type != FHCI_TA_SETUP || td->iso_index != 0) 263 urb->actual_length += td->actual_len; 264 } 265 } 266 267 /* there are some pedning request to unlink */ 268 void fhci_del_ed_list(struct fhci_hcd *fhci, struct ed *ed) 269 { 270 struct td *td = peek_td_from_ed(ed); 271 struct urb *urb = td->urb; 272 struct urb_priv *urb_priv = urb->hcpriv; 273 274 if (urb_priv->state == URB_DEL) { 275 td = fhci_remove_td_from_ed(ed); 276 /* HC may have partly processed this TD */ 277 if (td->status != USB_TD_INPROGRESS) 278 fhci_done_td(urb, td); 279 280 /* URB is done;clean up */ 281 if (++(urb_priv->tds_cnt) == urb_priv->num_of_tds) 282 fhci_urb_complete_free(fhci, urb); 283 } 284 } 285