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236dd4d1 AV |
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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
236dd4d1 AV |
23 | #include <linux/list.h> |
24 | #include <linux/usb.h> | |
27729aad | 25 | #include <linux/usb/hcd.h> |
236dd4d1 AV |
26 | #include "fhci.h" |
27 | ||
28 | /* maps the hardware error code to the USB error code */ | |
29 | static int status_to_error(u32 status) | |
30 | { | |
31 | if (status == USB_TD_OK) | |
32 | return 0; | |
33 | else if (status & USB_TD_RX_ER_CRC) | |
34 | return -EILSEQ; | |
35 | else if (status & USB_TD_RX_ER_NONOCT) | |
36 | return -EPROTO; | |
37 | else if (status & USB_TD_RX_ER_OVERUN) | |
38 | return -ECOMM; | |
39 | else if (status & USB_TD_RX_ER_BITSTUFF) | |
40 | return -EPROTO; | |
41 | else if (status & USB_TD_RX_ER_PID) | |
42 | return -EILSEQ; | |
43 | else if (status & (USB_TD_TX_ER_NAK | USB_TD_TX_ER_TIMEOUT)) | |
44 | return -ETIMEDOUT; | |
45 | else if (status & USB_TD_TX_ER_STALL) | |
46 | return -EPIPE; | |
47 | else if (status & USB_TD_TX_ER_UNDERUN) | |
48 | return -ENOSR; | |
49 | else if (status & USB_TD_RX_DATA_UNDERUN) | |
50 | return -EREMOTEIO; | |
51 | else if (status & USB_TD_RX_DATA_OVERUN) | |
52 | return -EOVERFLOW; | |
53 | else | |
54 | return -EINVAL; | |
55 | } | |
56 | ||
57 | void fhci_add_td_to_frame(struct fhci_time_frame *frame, struct td *td) | |
58 | { | |
59 | list_add_tail(&td->frame_lh, &frame->tds_list); | |
60 | } | |
61 | ||
62 | void fhci_add_tds_to_ed(struct ed *ed, struct td **td_list, int number) | |
63 | { | |
64 | int i; | |
65 | ||
66 | for (i = 0; i < number; i++) { | |
67 | struct td *td = td_list[i]; | |
68 | list_add_tail(&td->node, &ed->td_list); | |
69 | } | |
70 | if (ed->td_head == NULL) | |
71 | ed->td_head = td_list[0]; | |
72 | } | |
73 | ||
74 | static struct td *peek_td_from_ed(struct ed *ed) | |
75 | { | |
76 | struct td *td; | |
77 | ||
78 | if (!list_empty(&ed->td_list)) | |
79 | td = list_entry(ed->td_list.next, struct td, node); | |
80 | else | |
81 | td = NULL; | |
82 | ||
83 | return td; | |
84 | } | |
85 | ||
86 | struct td *fhci_remove_td_from_frame(struct fhci_time_frame *frame) | |
87 | { | |
88 | struct td *td; | |
89 | ||
90 | if (!list_empty(&frame->tds_list)) { | |
91 | td = list_entry(frame->tds_list.next, struct td, frame_lh); | |
92 | list_del_init(frame->tds_list.next); | |
93 | } else | |
94 | td = NULL; | |
95 | ||
96 | return td; | |
97 | } | |
98 | ||
99 | struct td *fhci_peek_td_from_frame(struct fhci_time_frame *frame) | |
100 | { | |
101 | struct td *td; | |
102 | ||
103 | if (!list_empty(&frame->tds_list)) | |
104 | td = list_entry(frame->tds_list.next, struct td, frame_lh); | |
105 | else | |
106 | td = NULL; | |
107 | ||
108 | return td; | |
109 | } | |
110 | ||
111 | struct td *fhci_remove_td_from_ed(struct ed *ed) | |
112 | { | |
113 | struct td *td; | |
114 | ||
115 | if (!list_empty(&ed->td_list)) { | |
116 | td = list_entry(ed->td_list.next, struct td, node); | |
117 | list_del_init(ed->td_list.next); | |
118 | ||
119 | /* if this TD was the ED's head, find next TD */ | |
120 | if (!list_empty(&ed->td_list)) | |
121 | ed->td_head = list_entry(ed->td_list.next, struct td, | |
122 | node); | |
123 | else | |
124 | ed->td_head = NULL; | |
125 | } else | |
126 | td = NULL; | |
127 | ||
128 | return td; | |
129 | } | |
130 | ||
131 | struct td *fhci_remove_td_from_done_list(struct fhci_controller_list *p_list) | |
132 | { | |
133 | struct td *td; | |
134 | ||
135 | if (!list_empty(&p_list->done_list)) { | |
136 | td = list_entry(p_list->done_list.next, struct td, node); | |
137 | list_del_init(p_list->done_list.next); | |
138 | } else | |
139 | td = NULL; | |
140 | ||
141 | return td; | |
142 | } | |
143 | ||
144 | void fhci_move_td_from_ed_to_done_list(struct fhci_usb *usb, struct ed *ed) | |
145 | { | |
146 | struct td *td; | |
147 | ||
148 | td = ed->td_head; | |
149 | list_del_init(&td->node); | |
150 | ||
151 | /* If this TD was the ED's head,find next TD */ | |
152 | if (!list_empty(&ed->td_list)) | |
153 | ed->td_head = list_entry(ed->td_list.next, struct td, node); | |
154 | else { | |
155 | ed->td_head = NULL; | |
156 | ed->state = FHCI_ED_SKIP; | |
157 | } | |
158 | ed->toggle_carry = td->toggle; | |
159 | list_add_tail(&td->node, &usb->hc_list->done_list); | |
160 | if (td->ioc) | |
161 | usb->transfer_confirm(usb->fhci); | |
162 | } | |
163 | ||
164 | /* free done FHCI URB resource such as ED and TD */ | |
165 | static void free_urb_priv(struct fhci_hcd *fhci, struct urb *urb) | |
166 | { | |
167 | int i; | |
168 | struct urb_priv *urb_priv = urb->hcpriv; | |
169 | struct ed *ed = urb_priv->ed; | |
170 | ||
171 | for (i = 0; i < urb_priv->num_of_tds; i++) { | |
172 | list_del_init(&urb_priv->tds[i]->node); | |
173 | fhci_recycle_empty_td(fhci, urb_priv->tds[i]); | |
174 | } | |
175 | ||
176 | /* if this TD was the ED's head,find the next TD */ | |
177 | if (!list_empty(&ed->td_list)) | |
178 | ed->td_head = list_entry(ed->td_list.next, struct td, node); | |
179 | else | |
180 | ed->td_head = NULL; | |
181 | ||
182 | kfree(urb_priv->tds); | |
183 | kfree(urb_priv); | |
184 | urb->hcpriv = NULL; | |
185 | ||
186 | /* if this TD was the ED's head,find next TD */ | |
187 | if (ed->td_head == NULL) | |
188 | list_del_init(&ed->node); | |
189 | fhci->active_urbs--; | |
190 | } | |
191 | ||
192 | /* this routine called to complete and free done URB */ | |
193 | void fhci_urb_complete_free(struct fhci_hcd *fhci, struct urb *urb) | |
194 | { | |
195 | free_urb_priv(fhci, urb); | |
196 | ||
197 | if (urb->status == -EINPROGRESS) { | |
198 | if (urb->actual_length != urb->transfer_buffer_length && | |
199 | urb->transfer_flags & URB_SHORT_NOT_OK) | |
200 | urb->status = -EREMOTEIO; | |
201 | else | |
202 | urb->status = 0; | |
203 | } | |
204 | ||
205 | usb_hcd_unlink_urb_from_ep(fhci_to_hcd(fhci), urb); | |
206 | ||
207 | spin_unlock(&fhci->lock); | |
208 | ||
209 | usb_hcd_giveback_urb(fhci_to_hcd(fhci), urb, urb->status); | |
210 | ||
211 | spin_lock(&fhci->lock); | |
212 | } | |
213 | ||
214 | /* | |
215 | * caculate transfer length/stats and update the urb | |
216 | * Precondition: irqsafe(only for urb-?status locking) | |
217 | */ | |
218 | void fhci_done_td(struct urb *urb, struct td *td) | |
219 | { | |
220 | struct ed *ed = td->ed; | |
221 | u32 cc = td->status; | |
222 | ||
223 | /* ISO...drivers see per-TD length/status */ | |
224 | if (ed->mode == FHCI_TF_ISO) { | |
225 | u32 len; | |
226 | if (!(urb->transfer_flags & URB_SHORT_NOT_OK && | |
227 | cc == USB_TD_RX_DATA_UNDERUN)) | |
228 | cc = USB_TD_OK; | |
229 | ||
230 | if (usb_pipeout(urb->pipe)) | |
231 | len = urb->iso_frame_desc[td->iso_index].length; | |
232 | else | |
233 | len = td->actual_len; | |
234 | ||
235 | urb->actual_length += len; | |
236 | urb->iso_frame_desc[td->iso_index].actual_length = len; | |
237 | urb->iso_frame_desc[td->iso_index].status = | |
238 | status_to_error(cc); | |
239 | } | |
240 | ||
241 | /* BULK,INT,CONTROL... drivers see aggregate length/status, | |
242 | * except that "setup" bytes aren't counted and "short" transfers | |
243 | * might not be reported as errors. | |
244 | */ | |
245 | else { | |
246 | if (td->error_cnt >= 3) | |
247 | urb->error_count = 3; | |
248 | ||
249 | /* control endpoint only have soft stalls */ | |
250 | ||
251 | /* update packet status if needed(short may be ok) */ | |
252 | if (!(urb->transfer_flags & URB_SHORT_NOT_OK) && | |
253 | cc == USB_TD_RX_DATA_UNDERUN) { | |
254 | ed->state = FHCI_ED_OPER; | |
255 | cc = USB_TD_OK; | |
256 | } | |
257 | if (cc != USB_TD_OK) { | |
258 | if (urb->status == -EINPROGRESS) | |
259 | urb->status = status_to_error(cc); | |
260 | } | |
261 | ||
262 | /* count all non-empty packets except control SETUP packet */ | |
263 | if (td->type != FHCI_TA_SETUP || td->iso_index != 0) | |
264 | urb->actual_length += td->actual_len; | |
265 | } | |
266 | } | |
267 | ||
268 | /* there are some pedning request to unlink */ | |
269 | void fhci_del_ed_list(struct fhci_hcd *fhci, struct ed *ed) | |
270 | { | |
271 | struct td *td = peek_td_from_ed(ed); | |
272 | struct urb *urb = td->urb; | |
273 | struct urb_priv *urb_priv = urb->hcpriv; | |
274 | ||
275 | if (urb_priv->state == URB_DEL) { | |
276 | td = fhci_remove_td_from_ed(ed); | |
277 | /* HC may have partly processed this TD */ | |
278 | if (td->status != USB_TD_INPROGRESS) | |
279 | fhci_done_td(urb, td); | |
280 | ||
281 | /* URB is done;clean up */ | |
282 | if (++(urb_priv->tds_cnt) == urb_priv->num_of_tds) | |
283 | fhci_urb_complete_free(fhci, urb); | |
284 | } | |
285 | } |