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eb50fd3a | 1 | // SPDX-License-Identifier: GPL-2.0 |
f587027e GKH |
2 | /* |
3 | * Greybus "AP" USB driver for "ES2" controller chips | |
4 | * | |
142f8ddf AE |
5 | * Copyright 2014-2015 Google Inc. |
6 | * Copyright 2014-2015 Linaro Ltd. | |
f587027e | 7 | */ |
ca3ec299 | 8 | #include <linux/kthread.h> |
f587027e GKH |
9 | #include <linux/sizes.h> |
10 | #include <linux/usb.h> | |
ca3ec299 GKH |
11 | #include <linux/kfifo.h> |
12 | #include <linux/debugfs.h> | |
c14118a8 | 13 | #include <linux/list.h> |
ec0ad868 | 14 | #include <linux/greybus.h> |
491e60d6 | 15 | #include <asm/unaligned.h> |
f587027e | 16 | |
7d0e76d6 | 17 | #include "arpc.h" |
b81beec9 | 18 | #include "greybus_trace.h" |
05061507 | 19 | |
54f34e1e | 20 | |
60793c9b JH |
21 | /* Default timeout for USB vendor requests. */ |
22 | #define ES2_USB_CTRL_TIMEOUT 500 | |
23 | ||
54f34e1e JH |
24 | /* Default timeout for ARPC CPort requests */ |
25 | #define ES2_ARPC_CPORT_TIMEOUT 500 | |
26 | ||
05061507 JH |
27 | /* Fixed CPort numbers */ |
28 | #define ES2_CPORT_CDSI0 16 | |
29 | #define ES2_CPORT_CDSI1 17 | |
30 | ||
4b1d8204 AE |
31 | /* Memory sizes for the buffers sent to/from the ES2 controller */ |
32 | #define ES2_GBUF_MSG_SIZE_MAX 2048 | |
f587027e | 33 | |
9d9d3777 | 34 | /* Memory sizes for the ARPC buffers */ |
c14118a8 | 35 | #define ARPC_OUT_SIZE_MAX U16_MAX |
9d9d3777 AB |
36 | #define ARPC_IN_SIZE_MAX 128 |
37 | ||
f587027e | 38 | static const struct usb_device_id id_table[] = { |
8f0a654f | 39 | { USB_DEVICE(0x18d1, 0x1eaf) }, |
f587027e GKH |
40 | { }, |
41 | }; | |
42 | MODULE_DEVICE_TABLE(usb, id_table); | |
43 | ||
ca3ec299 | 44 | #define APB1_LOG_SIZE SZ_16K |
ca3ec299 | 45 | |
f587027e GKH |
46 | /* |
47 | * Number of CPort IN urbs in flight at any point in time. | |
48 | * Adjust if we are having stalls in the USB buffer due to not enough urbs in | |
49 | * flight. | |
50 | */ | |
51 | #define NUM_CPORT_IN_URB 4 | |
52 | ||
53 | /* Number of CPort OUT urbs in flight at any point in time. | |
54 | * Adjust if we get messages saying we are out of urbs in the system log. | |
55 | */ | |
fc994f0f | 56 | #define NUM_CPORT_OUT_URB 8 |
f587027e | 57 | |
9d9d3777 AB |
58 | /* |
59 | * Number of ARPC in urbs in flight at any point in time. | |
60 | */ | |
61 | #define NUM_ARPC_IN_URB 2 | |
62 | ||
ddc09acd AB |
63 | /* |
64 | * @endpoint: bulk in endpoint for CPort data | |
65 | * @urb: array of urbs for the CPort in messages | |
66 | * @buffer: array of buffers for the @cport_in_urb urbs | |
67 | */ | |
4b1d8204 | 68 | struct es2_cport_in { |
ddc09acd AB |
69 | __u8 endpoint; |
70 | struct urb *urb[NUM_CPORT_IN_URB]; | |
71 | u8 *buffer[NUM_CPORT_IN_URB]; | |
72 | }; | |
73 | ||
f587027e | 74 | /** |
39d2a789 | 75 | * struct es2_ap_dev - ES2 USB Bridge to AP structure |
f587027e GKH |
76 | * @usb_dev: pointer to the USB device we are. |
77 | * @usb_intf: pointer to the USB interface we are bound to. | |
2537636a | 78 | * @hd: pointer to our gb_host_device structure |
39d2a789 | 79 | * |
ddc09acd | 80 | * @cport_in: endpoint, urbs and buffer for cport in messages |
403074b5 | 81 | * @cport_out_endpoint: endpoint for for cport out messages |
f587027e GKH |
82 | * @cport_out_urb: array of urbs for the CPort out messages |
83 | * @cport_out_urb_busy: array of flags to see if the @cport_out_urb is busy or | |
84 | * not. | |
3e136cc9 JH |
85 | * @cport_out_urb_cancelled: array of flags indicating whether the |
86 | * corresponding @cport_out_urb is being cancelled | |
f587027e | 87 | * @cport_out_urb_lock: locks the @cport_out_urb_busy "list" |
39d2a789 | 88 | * @cdsi1_in_use: true if cport CDSI1 is in use |
3be0e17d AE |
89 | * @apb_log_task: task pointer for logging thread |
90 | * @apb_log_dentry: file system entry for the log file interface | |
91 | * @apb_log_enable_dentry: file system entry for enabling logging | |
92 | * @apb_log_fifo: kernel FIFO to carry logged data | |
9d9d3777 AB |
93 | * @arpc_urb: array of urbs for the ARPC in messages |
94 | * @arpc_buffer: array of buffers for the @arpc_urb urbs | |
95 | * @arpc_endpoint_in: bulk in endpoint for APBridgeA RPC | |
c14118a8 AB |
96 | * @arpc_id_cycle: gives an unique id to ARPC |
97 | * @arpc_lock: locks ARPC list | |
98 | * @arpcs: list of in progress ARPCs | |
f587027e | 99 | */ |
4b1d8204 | 100 | struct es2_ap_dev { |
f587027e GKH |
101 | struct usb_device *usb_dev; |
102 | struct usb_interface *usb_intf; | |
2537636a | 103 | struct gb_host_device *hd; |
f587027e | 104 | |
7330c48e | 105 | struct es2_cport_in cport_in; |
403074b5 | 106 | __u8 cport_out_endpoint; |
f587027e GKH |
107 | struct urb *cport_out_urb[NUM_CPORT_OUT_URB]; |
108 | bool cport_out_urb_busy[NUM_CPORT_OUT_URB]; | |
3e136cc9 | 109 | bool cport_out_urb_cancelled[NUM_CPORT_OUT_URB]; |
f587027e | 110 | spinlock_t cport_out_urb_lock; |
fc1a536e | 111 | |
045d3561 JH |
112 | bool cdsi1_in_use; |
113 | ||
3be0e17d AE |
114 | struct task_struct *apb_log_task; |
115 | struct dentry *apb_log_dentry; | |
116 | struct dentry *apb_log_enable_dentry; | |
117 | DECLARE_KFIFO(apb_log_fifo, char, APB1_LOG_SIZE); | |
9d9d3777 AB |
118 | |
119 | __u8 arpc_endpoint_in; | |
120 | struct urb *arpc_urb[NUM_ARPC_IN_URB]; | |
121 | u8 *arpc_buffer[NUM_ARPC_IN_URB]; | |
c14118a8 AB |
122 | |
123 | int arpc_id_cycle; | |
124 | spinlock_t arpc_lock; | |
125 | struct list_head arpcs; | |
fc1a536e AB |
126 | }; |
127 | ||
c14118a8 AB |
128 | struct arpc { |
129 | struct list_head list; | |
130 | struct arpc_request_message *req; | |
131 | struct arpc_response_message *resp; | |
132 | struct completion response_received; | |
133 | bool active; | |
134 | }; | |
135 | ||
2537636a | 136 | static inline struct es2_ap_dev *hd_to_es2(struct gb_host_device *hd) |
f587027e | 137 | { |
4b1d8204 | 138 | return (struct es2_ap_dev *)&hd->hd_priv; |
f587027e GKH |
139 | } |
140 | ||
141 | static void cport_out_callback(struct urb *urb); | |
4b1d8204 AE |
142 | static void usb_log_enable(struct es2_ap_dev *es2); |
143 | static void usb_log_disable(struct es2_ap_dev *es2); | |
c14118a8 AB |
144 | static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload, |
145 | size_t size, int *result, unsigned int timeout); | |
f587027e | 146 | |
ed4596e9 | 147 | static int output_sync(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd) |
8e2b7daa | 148 | { |
8e2b7daa | 149 | struct usb_device *udev = es2->usb_dev; |
ed4596e9 | 150 | u8 *data; |
8e2b7daa LP |
151 | int retval; |
152 | ||
9edae492 | 153 | data = kmemdup(req, size, GFP_KERNEL); |
ed4596e9 | 154 | if (!data) |
ccb58035 | 155 | return -ENOMEM; |
8e2b7daa LP |
156 | |
157 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
ed4596e9 | 158 | cmd, |
8e2b7daa | 159 | USB_DIR_OUT | USB_TYPE_VENDOR | |
ed4596e9 | 160 | USB_RECIP_INTERFACE, |
60793c9b | 161 | 0, 0, data, size, ES2_USB_CTRL_TIMEOUT); |
ccb58035 | 162 | if (retval < 0) |
ed4596e9 GKH |
163 | dev_err(&udev->dev, "%s: return error %d\n", __func__, retval); |
164 | else | |
165 | retval = 0; | |
8e2b7daa | 166 | |
ed4596e9 | 167 | kfree(data); |
ccb58035 | 168 | return retval; |
8e2b7daa | 169 | } |
ed4596e9 GKH |
170 | |
171 | static void ap_urb_complete(struct urb *urb) | |
172 | { | |
173 | struct usb_ctrlrequest *dr = urb->context; | |
174 | ||
175 | kfree(dr); | |
176 | usb_free_urb(urb); | |
177 | } | |
178 | ||
179 | static int output_async(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd) | |
180 | { | |
181 | struct usb_device *udev = es2->usb_dev; | |
182 | struct urb *urb; | |
183 | struct usb_ctrlrequest *dr; | |
184 | u8 *buf; | |
185 | int retval; | |
186 | ||
187 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
188 | if (!urb) | |
189 | return -ENOMEM; | |
190 | ||
191 | dr = kmalloc(sizeof(*dr) + size, GFP_ATOMIC); | |
192 | if (!dr) { | |
193 | usb_free_urb(urb); | |
194 | return -ENOMEM; | |
195 | } | |
196 | ||
197 | buf = (u8 *)dr + sizeof(*dr); | |
198 | memcpy(buf, req, size); | |
199 | ||
200 | dr->bRequest = cmd; | |
201 | dr->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE; | |
202 | dr->wValue = 0; | |
203 | dr->wIndex = 0; | |
204 | dr->wLength = cpu_to_le16(size); | |
205 | ||
206 | usb_fill_control_urb(urb, udev, usb_sndctrlpipe(udev, 0), | |
207 | (unsigned char *)dr, buf, size, | |
208 | ap_urb_complete, dr); | |
209 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
210 | if (retval) { | |
211 | usb_free_urb(urb); | |
212 | kfree(dr); | |
213 | } | |
214 | return retval; | |
215 | } | |
216 | ||
217 | static int output(struct gb_host_device *hd, void *req, u16 size, u8 cmd, | |
8478c35a | 218 | bool async) |
ed4596e9 GKH |
219 | { |
220 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
221 | ||
222 | if (async) | |
223 | return output_async(es2, req, size, cmd); | |
224 | ||
225 | return output_sync(es2, req, size, cmd); | |
226 | } | |
8e2b7daa | 227 | |
0ce68ce4 | 228 | static int es2_cport_in_enable(struct es2_ap_dev *es2, |
8478c35a | 229 | struct es2_cport_in *cport_in) |
0ce68ce4 JH |
230 | { |
231 | struct urb *urb; | |
232 | int ret; | |
233 | int i; | |
234 | ||
235 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { | |
236 | urb = cport_in->urb[i]; | |
237 | ||
238 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
239 | if (ret) { | |
240 | dev_err(&es2->usb_dev->dev, | |
8478c35a | 241 | "failed to submit in-urb: %d\n", ret); |
0ce68ce4 JH |
242 | goto err_kill_urbs; |
243 | } | |
244 | } | |
245 | ||
246 | return 0; | |
247 | ||
248 | err_kill_urbs: | |
249 | for (--i; i >= 0; --i) { | |
250 | urb = cport_in->urb[i]; | |
251 | usb_kill_urb(urb); | |
252 | } | |
253 | ||
254 | return ret; | |
255 | } | |
256 | ||
f6624ca7 | 257 | static void es2_cport_in_disable(struct es2_ap_dev *es2, |
8478c35a | 258 | struct es2_cport_in *cport_in) |
f6624ca7 JH |
259 | { |
260 | struct urb *urb; | |
261 | int i; | |
262 | ||
263 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { | |
264 | urb = cport_in->urb[i]; | |
265 | usb_kill_urb(urb); | |
266 | } | |
267 | } | |
268 | ||
9d9d3777 AB |
269 | static int es2_arpc_in_enable(struct es2_ap_dev *es2) |
270 | { | |
271 | struct urb *urb; | |
272 | int ret; | |
273 | int i; | |
274 | ||
275 | for (i = 0; i < NUM_ARPC_IN_URB; ++i) { | |
276 | urb = es2->arpc_urb[i]; | |
277 | ||
278 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
279 | if (ret) { | |
280 | dev_err(&es2->usb_dev->dev, | |
281 | "failed to submit arpc in-urb: %d\n", ret); | |
282 | goto err_kill_urbs; | |
283 | } | |
284 | } | |
285 | ||
286 | return 0; | |
287 | ||
288 | err_kill_urbs: | |
289 | for (--i; i >= 0; --i) { | |
290 | urb = es2->arpc_urb[i]; | |
291 | usb_kill_urb(urb); | |
292 | } | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
297 | static void es2_arpc_in_disable(struct es2_ap_dev *es2) | |
298 | { | |
299 | struct urb *urb; | |
300 | int i; | |
301 | ||
302 | for (i = 0; i < NUM_ARPC_IN_URB; ++i) { | |
303 | urb = es2->arpc_urb[i]; | |
304 | usb_kill_urb(urb); | |
305 | } | |
306 | } | |
307 | ||
4b1d8204 | 308 | static struct urb *next_free_urb(struct es2_ap_dev *es2, gfp_t gfp_mask) |
f587027e GKH |
309 | { |
310 | struct urb *urb = NULL; | |
311 | unsigned long flags; | |
312 | int i; | |
313 | ||
4b1d8204 | 314 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
f587027e GKH |
315 | |
316 | /* Look in our pool of allocated urbs first, as that's the "fastest" */ | |
317 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { | |
2eece0a8 IV |
318 | if (!es2->cport_out_urb_busy[i] && |
319 | !es2->cport_out_urb_cancelled[i]) { | |
4b1d8204 AE |
320 | es2->cport_out_urb_busy[i] = true; |
321 | urb = es2->cport_out_urb[i]; | |
f587027e GKH |
322 | break; |
323 | } | |
324 | } | |
4b1d8204 | 325 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
f587027e GKH |
326 | if (urb) |
327 | return urb; | |
328 | ||
329 | /* | |
330 | * Crap, pool is empty, complain to the syslog and go allocate one | |
331 | * dynamically as we have to succeed. | |
332 | */ | |
ed972e3a | 333 | dev_dbg(&es2->usb_dev->dev, |
f587027e GKH |
334 | "No free CPort OUT urbs, having to dynamically allocate one!\n"); |
335 | return usb_alloc_urb(0, gfp_mask); | |
336 | } | |
337 | ||
4b1d8204 | 338 | static void free_urb(struct es2_ap_dev *es2, struct urb *urb) |
f587027e GKH |
339 | { |
340 | unsigned long flags; | |
341 | int i; | |
342 | /* | |
343 | * See if this was an urb in our pool, if so mark it "free", otherwise | |
344 | * we need to free it ourselves. | |
345 | */ | |
4b1d8204 | 346 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
f587027e | 347 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
4b1d8204 AE |
348 | if (urb == es2->cport_out_urb[i]) { |
349 | es2->cport_out_urb_busy[i] = false; | |
f587027e GKH |
350 | urb = NULL; |
351 | break; | |
352 | } | |
353 | } | |
4b1d8204 | 354 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
f587027e GKH |
355 | |
356 | /* If urb is not NULL, then we need to free this urb */ | |
357 | usb_free_urb(urb); | |
358 | } | |
359 | ||
d29b3d63 AE |
360 | /* |
361 | * We (ab)use the operation-message header pad bytes to transfer the | |
362 | * cport id in order to minimise overhead. | |
363 | */ | |
364 | static void | |
365 | gb_message_cport_pack(struct gb_operation_msg_hdr *header, u16 cport_id) | |
366 | { | |
4bc1389d | 367 | header->pad[0] = cport_id; |
d29b3d63 AE |
368 | } |
369 | ||
370 | /* Clear the pad bytes used for the CPort id */ | |
371 | static void gb_message_cport_clear(struct gb_operation_msg_hdr *header) | |
372 | { | |
4bc1389d | 373 | header->pad[0] = 0; |
d29b3d63 AE |
374 | } |
375 | ||
376 | /* Extract the CPort id packed into the header, and clear it */ | |
377 | static u16 gb_message_cport_unpack(struct gb_operation_msg_hdr *header) | |
378 | { | |
4bc1389d | 379 | u16 cport_id = header->pad[0]; |
d29b3d63 AE |
380 | |
381 | gb_message_cport_clear(header); | |
382 | ||
383 | return cport_id; | |
384 | } | |
385 | ||
f587027e | 386 | /* |
3e136cc9 JH |
387 | * Returns zero if the message was successfully queued, or a negative errno |
388 | * otherwise. | |
f587027e | 389 | */ |
2537636a | 390 | static int message_send(struct gb_host_device *hd, u16 cport_id, |
7cf7bca9 | 391 | struct gb_message *message, gfp_t gfp_mask) |
f587027e | 392 | { |
4b1d8204 AE |
393 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
394 | struct usb_device *udev = es2->usb_dev; | |
7cf7bca9 | 395 | size_t buffer_size; |
f587027e GKH |
396 | int retval; |
397 | struct urb *urb; | |
3e136cc9 | 398 | unsigned long flags; |
f587027e | 399 | |
f587027e GKH |
400 | /* |
401 | * The data actually transferred will include an indication | |
402 | * of where the data should be sent. Do one last check of | |
403 | * the target CPort id before filling it in. | |
404 | */ | |
144670c2 | 405 | if (!cport_id_valid(hd, cport_id)) { |
100e9000 | 406 | dev_err(&udev->dev, "invalid cport %u\n", cport_id); |
3e136cc9 | 407 | return -EINVAL; |
f587027e | 408 | } |
f587027e GKH |
409 | |
410 | /* Find a free urb */ | |
4b1d8204 | 411 | urb = next_free_urb(es2, gfp_mask); |
f587027e | 412 | if (!urb) |
3e136cc9 JH |
413 | return -ENOMEM; |
414 | ||
4b1d8204 | 415 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
3e136cc9 | 416 | message->hcpriv = urb; |
4b1d8204 | 417 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
f587027e | 418 | |
d29b3d63 AE |
419 | /* Pack the cport id into the message header */ |
420 | gb_message_cport_pack(message->header, cport_id); | |
491e60d6 | 421 | |
821c620a | 422 | buffer_size = sizeof(*message->header) + message->payload_size; |
491e60d6 | 423 | |
f587027e | 424 | usb_fill_bulk_urb(urb, udev, |
606addd2 | 425 | usb_sndbulkpipe(udev, |
403074b5 | 426 | es2->cport_out_endpoint), |
821c620a | 427 | message->buffer, buffer_size, |
7cf7bca9 | 428 | cport_out_callback, message); |
977e209a | 429 | urb->transfer_flags |= URB_ZERO_PACKET; |
495787a7 AE |
430 | |
431 | trace_gb_message_submit(message); | |
432 | ||
f587027e GKH |
433 | retval = usb_submit_urb(urb, gfp_mask); |
434 | if (retval) { | |
05e30955 | 435 | dev_err(&udev->dev, "failed to submit out-urb: %d\n", retval); |
3e136cc9 | 436 | |
4b1d8204 | 437 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
3e136cc9 | 438 | message->hcpriv = NULL; |
4b1d8204 | 439 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
3e136cc9 | 440 | |
4b1d8204 | 441 | free_urb(es2, urb); |
d29b3d63 | 442 | gb_message_cport_clear(message->header); |
3e136cc9 JH |
443 | |
444 | return retval; | |
f587027e GKH |
445 | } |
446 | ||
3e136cc9 | 447 | return 0; |
f587027e GKH |
448 | } |
449 | ||
450 | /* | |
3e136cc9 | 451 | * Can not be called in atomic context. |
f587027e | 452 | */ |
3e136cc9 | 453 | static void message_cancel(struct gb_message *message) |
f587027e | 454 | { |
2537636a | 455 | struct gb_host_device *hd = message->operation->connection->hd; |
4b1d8204 | 456 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
3e136cc9 JH |
457 | struct urb *urb; |
458 | int i; | |
f587027e | 459 | |
3e136cc9 JH |
460 | might_sleep(); |
461 | ||
07af9340 | 462 | spin_lock_irq(&es2->cport_out_urb_lock); |
3e136cc9 JH |
463 | urb = message->hcpriv; |
464 | ||
465 | /* Prevent dynamically allocated urb from being deallocated. */ | |
466 | usb_get_urb(urb); | |
467 | ||
468 | /* Prevent pre-allocated urb from being reused. */ | |
469 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { | |
4b1d8204 AE |
470 | if (urb == es2->cport_out_urb[i]) { |
471 | es2->cport_out_urb_cancelled[i] = true; | |
3e136cc9 JH |
472 | break; |
473 | } | |
474 | } | |
07af9340 | 475 | spin_unlock_irq(&es2->cport_out_urb_lock); |
3e136cc9 JH |
476 | |
477 | usb_kill_urb(urb); | |
478 | ||
479 | if (i < NUM_CPORT_OUT_URB) { | |
07af9340 | 480 | spin_lock_irq(&es2->cport_out_urb_lock); |
4b1d8204 | 481 | es2->cport_out_urb_cancelled[i] = false; |
07af9340 | 482 | spin_unlock_irq(&es2->cport_out_urb_lock); |
3e136cc9 JH |
483 | } |
484 | ||
485 | usb_free_urb(urb); | |
f587027e GKH |
486 | } |
487 | ||
045d3561 | 488 | static int es2_cport_allocate(struct gb_host_device *hd, int cport_id, |
8478c35a | 489 | unsigned long flags) |
045d3561 JH |
490 | { |
491 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
492 | struct ida *id_map = &hd->cport_id_map; | |
493 | int ida_start, ida_end; | |
494 | ||
495 | switch (cport_id) { | |
496 | case ES2_CPORT_CDSI0: | |
497 | case ES2_CPORT_CDSI1: | |
498 | dev_err(&hd->dev, "cport %d not available\n", cport_id); | |
499 | return -EBUSY; | |
500 | } | |
501 | ||
502 | if (flags & GB_CONNECTION_FLAG_OFFLOADED && | |
8478c35a | 503 | flags & GB_CONNECTION_FLAG_CDSI1) { |
045d3561 JH |
504 | if (es2->cdsi1_in_use) { |
505 | dev_err(&hd->dev, "CDSI1 already in use\n"); | |
506 | return -EBUSY; | |
507 | } | |
508 | ||
509 | es2->cdsi1_in_use = true; | |
510 | ||
511 | return ES2_CPORT_CDSI1; | |
512 | } | |
513 | ||
514 | if (cport_id < 0) { | |
515 | ida_start = 0; | |
516 | ida_end = hd->num_cports; | |
517 | } else if (cport_id < hd->num_cports) { | |
518 | ida_start = cport_id; | |
519 | ida_end = cport_id + 1; | |
520 | } else { | |
521 | dev_err(&hd->dev, "cport %d not available\n", cport_id); | |
522 | return -EINVAL; | |
523 | } | |
524 | ||
525 | return ida_simple_get(id_map, ida_start, ida_end, GFP_KERNEL); | |
526 | } | |
527 | ||
528 | static void es2_cport_release(struct gb_host_device *hd, u16 cport_id) | |
529 | { | |
530 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
531 | ||
532 | switch (cport_id) { | |
533 | case ES2_CPORT_CDSI1: | |
534 | es2->cdsi1_in_use = false; | |
535 | return; | |
536 | } | |
537 | ||
538 | ida_simple_remove(&hd->cport_id_map, cport_id); | |
539 | } | |
540 | ||
74ec7598 JH |
541 | static int cport_enable(struct gb_host_device *hd, u16 cport_id, |
542 | unsigned long flags) | |
543 | { | |
544 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
545 | struct usb_device *udev = es2->usb_dev; | |
546 | struct gb_apb_request_cport_flags *req; | |
6a1d2959 | 547 | u32 connection_flags; |
74ec7598 JH |
548 | int ret; |
549 | ||
550 | req = kzalloc(sizeof(*req), GFP_KERNEL); | |
551 | if (!req) | |
552 | return -ENOMEM; | |
553 | ||
6a1d2959 | 554 | connection_flags = 0; |
74ec7598 | 555 | if (flags & GB_CONNECTION_FLAG_CONTROL) |
6a1d2959 | 556 | connection_flags |= GB_APB_CPORT_FLAG_CONTROL; |
74ec7598 | 557 | if (flags & GB_CONNECTION_FLAG_HIGH_PRIO) |
6a1d2959 BD |
558 | connection_flags |= GB_APB_CPORT_FLAG_HIGH_PRIO; |
559 | ||
560 | req->flags = cpu_to_le32(connection_flags); | |
74ec7598 JH |
561 | |
562 | dev_dbg(&hd->dev, "%s - cport = %u, flags = %02x\n", __func__, | |
8478c35a | 563 | cport_id, connection_flags); |
74ec7598 JH |
564 | |
565 | ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
8478c35a CS |
566 | GB_APB_REQUEST_CPORT_FLAGS, |
567 | USB_DIR_OUT | USB_TYPE_VENDOR | | |
568 | USB_RECIP_INTERFACE, cport_id, 0, | |
569 | req, sizeof(*req), ES2_USB_CTRL_TIMEOUT); | |
e4240253 | 570 | if (ret < 0) { |
74ec7598 | 571 | dev_err(&udev->dev, "failed to set cport flags for port %d\n", |
8478c35a | 572 | cport_id); |
74ec7598 JH |
573 | goto out; |
574 | } | |
575 | ||
576 | ret = 0; | |
577 | out: | |
578 | kfree(req); | |
579 | ||
580 | return ret; | |
581 | } | |
582 | ||
a9dc1cf5 JH |
583 | static int es2_cport_connected(struct gb_host_device *hd, u16 cport_id) |
584 | { | |
585 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
586 | struct device *dev = &es2->usb_dev->dev; | |
587 | struct arpc_cport_connected_req req; | |
588 | int ret; | |
589 | ||
590 | req.cport_id = cpu_to_le16(cport_id); | |
591 | ret = arpc_sync(es2, ARPC_TYPE_CPORT_CONNECTED, &req, sizeof(req), | |
592 | NULL, ES2_ARPC_CPORT_TIMEOUT); | |
593 | if (ret) { | |
594 | dev_err(dev, "failed to set connected state for cport %u: %d\n", | |
8478c35a | 595 | cport_id, ret); |
a9dc1cf5 JH |
596 | return ret; |
597 | } | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
d2dee94b JH |
602 | static int es2_cport_flush(struct gb_host_device *hd, u16 cport_id) |
603 | { | |
604 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
605 | struct device *dev = &es2->usb_dev->dev; | |
606 | struct arpc_cport_flush_req req; | |
607 | int ret; | |
608 | ||
609 | req.cport_id = cpu_to_le16(cport_id); | |
610 | ret = arpc_sync(es2, ARPC_TYPE_CPORT_FLUSH, &req, sizeof(req), | |
611 | NULL, ES2_ARPC_CPORT_TIMEOUT); | |
612 | if (ret) { | |
613 | dev_err(dev, "failed to flush cport %u: %d\n", cport_id, ret); | |
614 | return ret; | |
615 | } | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
77e52b3b | 620 | static int es2_cport_shutdown(struct gb_host_device *hd, u16 cport_id, |
8478c35a | 621 | u8 phase, unsigned int timeout) |
77e52b3b JH |
622 | { |
623 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
624 | struct device *dev = &es2->usb_dev->dev; | |
625 | struct arpc_cport_shutdown_req req; | |
626 | int result; | |
627 | int ret; | |
628 | ||
629 | if (timeout > U16_MAX) | |
630 | return -EINVAL; | |
631 | ||
632 | req.cport_id = cpu_to_le16(cport_id); | |
633 | req.timeout = cpu_to_le16(timeout); | |
634 | req.phase = phase; | |
635 | ret = arpc_sync(es2, ARPC_TYPE_CPORT_SHUTDOWN, &req, sizeof(req), | |
636 | &result, ES2_ARPC_CPORT_TIMEOUT + timeout); | |
637 | if (ret) { | |
638 | dev_err(dev, "failed to send shutdown over cport %u: %d (%d)\n", | |
8478c35a | 639 | cport_id, ret, result); |
77e52b3b JH |
640 | return ret; |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
0e7cd0d2 | 646 | static int es2_cport_quiesce(struct gb_host_device *hd, u16 cport_id, |
8478c35a | 647 | size_t peer_space, unsigned int timeout) |
0e7cd0d2 JH |
648 | { |
649 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
650 | struct device *dev = &es2->usb_dev->dev; | |
651 | struct arpc_cport_quiesce_req req; | |
652 | int result; | |
653 | int ret; | |
654 | ||
655 | if (peer_space > U16_MAX) | |
656 | return -EINVAL; | |
657 | ||
658 | if (timeout > U16_MAX) | |
659 | return -EINVAL; | |
660 | ||
661 | req.cport_id = cpu_to_le16(cport_id); | |
662 | req.peer_space = cpu_to_le16(peer_space); | |
663 | req.timeout = cpu_to_le16(timeout); | |
664 | ret = arpc_sync(es2, ARPC_TYPE_CPORT_QUIESCE, &req, sizeof(req), | |
665 | &result, ES2_ARPC_CPORT_TIMEOUT + timeout); | |
666 | if (ret) { | |
667 | dev_err(dev, "failed to quiesce cport %u: %d (%d)\n", | |
8478c35a | 668 | cport_id, ret, result); |
0e7cd0d2 JH |
669 | return ret; |
670 | } | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
6471c003 JH |
675 | static int es2_cport_clear(struct gb_host_device *hd, u16 cport_id) |
676 | { | |
677 | struct es2_ap_dev *es2 = hd_to_es2(hd); | |
678 | struct device *dev = &es2->usb_dev->dev; | |
679 | struct arpc_cport_clear_req req; | |
680 | int ret; | |
681 | ||
682 | req.cport_id = cpu_to_le16(cport_id); | |
683 | ret = arpc_sync(es2, ARPC_TYPE_CPORT_CLEAR, &req, sizeof(req), | |
684 | NULL, ES2_ARPC_CPORT_TIMEOUT); | |
685 | if (ret) { | |
686 | dev_err(dev, "failed to clear cport %u: %d\n", cport_id, ret); | |
687 | return ret; | |
688 | } | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
2537636a | 693 | static int latency_tag_enable(struct gb_host_device *hd, u16 cport_id) |
608ab2fe BD |
694 | { |
695 | int retval; | |
4b1d8204 AE |
696 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
697 | struct usb_device *udev = es2->usb_dev; | |
608ab2fe | 698 | |
608ab2fe | 699 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
e5273381 | 700 | GB_APB_REQUEST_LATENCY_TAG_EN, |
608ab2fe BD |
701 | USB_DIR_OUT | USB_TYPE_VENDOR | |
702 | USB_RECIP_INTERFACE, cport_id, 0, NULL, | |
60793c9b | 703 | 0, ES2_USB_CTRL_TIMEOUT); |
608ab2fe BD |
704 | |
705 | if (retval < 0) | |
706 | dev_err(&udev->dev, "Cannot enable latency tag for cport %d\n", | |
707 | cport_id); | |
708 | return retval; | |
709 | } | |
710 | ||
2537636a | 711 | static int latency_tag_disable(struct gb_host_device *hd, u16 cport_id) |
608ab2fe BD |
712 | { |
713 | int retval; | |
4b1d8204 AE |
714 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
715 | struct usb_device *udev = es2->usb_dev; | |
608ab2fe | 716 | |
608ab2fe | 717 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
e5273381 | 718 | GB_APB_REQUEST_LATENCY_TAG_DIS, |
608ab2fe BD |
719 | USB_DIR_OUT | USB_TYPE_VENDOR | |
720 | USB_RECIP_INTERFACE, cport_id, 0, NULL, | |
60793c9b | 721 | 0, ES2_USB_CTRL_TIMEOUT); |
608ab2fe BD |
722 | |
723 | if (retval < 0) | |
724 | dev_err(&udev->dev, "Cannot disable latency tag for cport %d\n", | |
725 | cport_id); | |
726 | return retval; | |
727 | } | |
728 | ||
a8cc020f | 729 | static struct gb_hd_driver es2_driver = { |
c8a657ba BD |
730 | .hd_priv_size = sizeof(struct es2_ap_dev), |
731 | .message_send = message_send, | |
732 | .message_cancel = message_cancel, | |
733 | .cport_allocate = es2_cport_allocate, | |
734 | .cport_release = es2_cport_release, | |
74ec7598 | 735 | .cport_enable = cport_enable, |
a9dc1cf5 | 736 | .cport_connected = es2_cport_connected, |
d2dee94b | 737 | .cport_flush = es2_cport_flush, |
77e52b3b | 738 | .cport_shutdown = es2_cport_shutdown, |
0e7cd0d2 | 739 | .cport_quiesce = es2_cport_quiesce, |
6471c003 | 740 | .cport_clear = es2_cport_clear, |
c8a657ba BD |
741 | .latency_tag_enable = latency_tag_enable, |
742 | .latency_tag_disable = latency_tag_disable, | |
743 | .output = output, | |
f587027e GKH |
744 | }; |
745 | ||
746 | /* Common function to report consistent warnings based on URB status */ | |
747 | static int check_urb_status(struct urb *urb) | |
748 | { | |
749 | struct device *dev = &urb->dev->dev; | |
750 | int status = urb->status; | |
751 | ||
752 | switch (status) { | |
753 | case 0: | |
754 | return 0; | |
755 | ||
756 | case -EOVERFLOW: | |
757 | dev_err(dev, "%s: overflow actual length is %d\n", | |
758 | __func__, urb->actual_length); | |
37b8b73f | 759 | fallthrough; |
f587027e GKH |
760 | case -ECONNRESET: |
761 | case -ENOENT: | |
762 | case -ESHUTDOWN: | |
763 | case -EILSEQ: | |
764 | case -EPROTO: | |
765 | /* device is gone, stop sending */ | |
766 | return status; | |
767 | } | |
768 | dev_err(dev, "%s: unknown status %d\n", __func__, status); | |
769 | ||
770 | return -EAGAIN; | |
771 | } | |
772 | ||
57bc17ff | 773 | static void es2_destroy(struct es2_ap_dev *es2) |
f587027e | 774 | { |
f587027e | 775 | struct usb_device *udev; |
1521eb6b | 776 | struct urb *urb; |
f587027e GKH |
777 | int i; |
778 | ||
74cd6503 | 779 | debugfs_remove(es2->apb_log_enable_dentry); |
4b1d8204 | 780 | usb_log_disable(es2); |
ca3ec299 | 781 | |
f587027e GKH |
782 | /* Tear down everything! */ |
783 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { | |
1521eb6b | 784 | urb = es2->cport_out_urb[i]; |
f587027e GKH |
785 | usb_kill_urb(urb); |
786 | usb_free_urb(urb); | |
4b1d8204 AE |
787 | es2->cport_out_urb[i] = NULL; |
788 | es2->cport_out_urb_busy[i] = false; /* just to be anal */ | |
f587027e GKH |
789 | } |
790 | ||
9d9d3777 | 791 | for (i = 0; i < NUM_ARPC_IN_URB; ++i) { |
1521eb6b | 792 | usb_free_urb(es2->arpc_urb[i]); |
9d9d3777 AB |
793 | kfree(es2->arpc_buffer[i]); |
794 | es2->arpc_buffer[i] = NULL; | |
795 | } | |
796 | ||
7330c48e GKH |
797 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
798 | usb_free_urb(es2->cport_in.urb[i]); | |
799 | kfree(es2->cport_in.buffer[i]); | |
800 | es2->cport_in.buffer[i] = NULL; | |
f587027e GKH |
801 | } |
802 | ||
52033fde VA |
803 | /* release reserved CDSI0 and CDSI1 cports */ |
804 | gb_hd_cport_release_reserved(es2->hd, ES2_CPORT_CDSI1); | |
805 | gb_hd_cport_release_reserved(es2->hd, ES2_CPORT_CDSI0); | |
806 | ||
4b1d8204 | 807 | udev = es2->usb_dev; |
c1700479 | 808 | gb_hd_put(es2->hd); |
f587027e GKH |
809 | |
810 | usb_put_dev(udev); | |
811 | } | |
812 | ||
f587027e GKH |
813 | static void cport_in_callback(struct urb *urb) |
814 | { | |
2537636a | 815 | struct gb_host_device *hd = urb->context; |
f587027e | 816 | struct device *dev = &urb->dev->dev; |
491e60d6 | 817 | struct gb_operation_msg_hdr *header; |
f587027e GKH |
818 | int status = check_urb_status(urb); |
819 | int retval; | |
820 | u16 cport_id; | |
f587027e GKH |
821 | |
822 | if (status) { | |
823 | if ((status == -EAGAIN) || (status == -EPROTO)) | |
824 | goto exit; | |
62de6e0a VK |
825 | |
826 | /* The urb is being unlinked */ | |
827 | if (status == -ENOENT || status == -ESHUTDOWN) | |
828 | return; | |
829 | ||
f587027e GKH |
830 | dev_err(dev, "urb cport in error %d (dropped)\n", status); |
831 | return; | |
832 | } | |
833 | ||
491e60d6 | 834 | if (urb->actual_length < sizeof(*header)) { |
305a031e | 835 | dev_err(dev, "short message received\n"); |
f587027e GKH |
836 | goto exit; |
837 | } | |
838 | ||
d29b3d63 | 839 | /* Extract the CPort id, which is packed in the message header */ |
491e60d6 | 840 | header = urb->transfer_buffer; |
d29b3d63 | 841 | cport_id = gb_message_cport_unpack(header); |
f587027e | 842 | |
6872c461 | 843 | if (cport_id_valid(hd, cport_id)) { |
821c620a | 844 | greybus_data_rcvd(hd, cport_id, urb->transfer_buffer, |
8478c35a | 845 | urb->actual_length); |
6872c461 | 846 | } else { |
100e9000 | 847 | dev_err(dev, "invalid cport id %u received\n", cport_id); |
6872c461 | 848 | } |
f587027e GKH |
849 | exit: |
850 | /* put our urb back in the request pool */ | |
851 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
852 | if (retval) | |
305a031e | 853 | dev_err(dev, "failed to resubmit in-urb: %d\n", retval); |
f587027e GKH |
854 | } |
855 | ||
856 | static void cport_out_callback(struct urb *urb) | |
857 | { | |
7cf7bca9 | 858 | struct gb_message *message = urb->context; |
2537636a | 859 | struct gb_host_device *hd = message->operation->connection->hd; |
4b1d8204 | 860 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
f587027e | 861 | int status = check_urb_status(urb); |
3e136cc9 | 862 | unsigned long flags; |
f587027e | 863 | |
d29b3d63 | 864 | gb_message_cport_clear(message->header); |
491e60d6 | 865 | |
4b1d8204 | 866 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
58c85123 | 867 | message->hcpriv = NULL; |
4b1d8204 | 868 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
58c85123 | 869 | |
f587027e | 870 | /* |
7cf7bca9 JH |
871 | * Tell the submitter that the message send (attempt) is |
872 | * complete, and report the status. | |
f587027e | 873 | */ |
7cf7bca9 JH |
874 | greybus_message_sent(hd, message, status); |
875 | ||
4b1d8204 | 876 | free_urb(es2, urb); |
f587027e GKH |
877 | } |
878 | ||
c14118a8 AB |
879 | static struct arpc *arpc_alloc(void *payload, u16 size, u8 type) |
880 | { | |
881 | struct arpc *rpc; | |
882 | ||
883 | if (size + sizeof(*rpc->req) > ARPC_OUT_SIZE_MAX) | |
884 | return NULL; | |
885 | ||
886 | rpc = kzalloc(sizeof(*rpc), GFP_KERNEL); | |
887 | if (!rpc) | |
888 | return NULL; | |
889 | ||
890 | INIT_LIST_HEAD(&rpc->list); | |
891 | rpc->req = kzalloc(sizeof(*rpc->req) + size, GFP_KERNEL); | |
892 | if (!rpc->req) | |
893 | goto err_free_rpc; | |
894 | ||
895 | rpc->resp = kzalloc(sizeof(*rpc->resp), GFP_KERNEL); | |
fcba5d04 | 896 | if (!rpc->resp) |
c14118a8 AB |
897 | goto err_free_req; |
898 | ||
899 | rpc->req->type = type; | |
7fec2bc9 | 900 | rpc->req->size = cpu_to_le16(sizeof(*rpc->req) + size); |
c14118a8 AB |
901 | memcpy(rpc->req->data, payload, size); |
902 | ||
903 | init_completion(&rpc->response_received); | |
904 | ||
905 | return rpc; | |
906 | ||
907 | err_free_req: | |
908 | kfree(rpc->req); | |
909 | err_free_rpc: | |
910 | kfree(rpc); | |
911 | ||
912 | return NULL; | |
913 | } | |
914 | ||
915 | static void arpc_free(struct arpc *rpc) | |
916 | { | |
917 | kfree(rpc->req); | |
918 | kfree(rpc->resp); | |
919 | kfree(rpc); | |
920 | } | |
921 | ||
165a74ab | 922 | static struct arpc *arpc_find(struct es2_ap_dev *es2, __le16 id) |
c14118a8 AB |
923 | { |
924 | struct arpc *rpc; | |
925 | ||
926 | list_for_each_entry(rpc, &es2->arpcs, list) { | |
165a74ab | 927 | if (rpc->req->id == id) |
c14118a8 AB |
928 | return rpc; |
929 | } | |
930 | ||
931 | return NULL; | |
932 | } | |
933 | ||
934 | static void arpc_add(struct es2_ap_dev *es2, struct arpc *rpc) | |
935 | { | |
936 | rpc->active = true; | |
e818027c | 937 | rpc->req->id = cpu_to_le16(es2->arpc_id_cycle++); |
c0219cbf | 938 | list_add_tail(&rpc->list, &es2->arpcs); |
c14118a8 AB |
939 | } |
940 | ||
941 | static void arpc_del(struct es2_ap_dev *es2, struct arpc *rpc) | |
942 | { | |
943 | if (rpc->active) { | |
944 | rpc->active = false; | |
945 | list_del(&rpc->list); | |
946 | } | |
947 | } | |
948 | ||
949 | static int arpc_send(struct es2_ap_dev *es2, struct arpc *rpc, int timeout) | |
950 | { | |
951 | struct usb_device *udev = es2->usb_dev; | |
952 | int retval; | |
953 | ||
954 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
83d474f7 | 955 | GB_APB_REQUEST_ARPC_RUN, |
c14118a8 AB |
956 | USB_DIR_OUT | USB_TYPE_VENDOR | |
957 | USB_RECIP_INTERFACE, | |
958 | 0, 0, | |
e818027c | 959 | rpc->req, le16_to_cpu(rpc->req->size), |
60793c9b | 960 | ES2_USB_CTRL_TIMEOUT); |
e4240253 | 961 | if (retval < 0) { |
c14118a8 AB |
962 | dev_err(&udev->dev, |
963 | "failed to send ARPC request %d: %d\n", | |
964 | rpc->req->type, retval); | |
c14118a8 AB |
965 | return retval; |
966 | } | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload, | |
972 | size_t size, int *result, unsigned int timeout) | |
973 | { | |
974 | struct arpc *rpc; | |
975 | unsigned long flags; | |
976 | int retval; | |
977 | ||
121bae2b JH |
978 | if (result) |
979 | *result = 0; | |
4ae2d962 | 980 | |
c14118a8 AB |
981 | rpc = arpc_alloc(payload, size, type); |
982 | if (!rpc) | |
983 | return -ENOMEM; | |
984 | ||
985 | spin_lock_irqsave(&es2->arpc_lock, flags); | |
986 | arpc_add(es2, rpc); | |
987 | spin_unlock_irqrestore(&es2->arpc_lock, flags); | |
988 | ||
989 | retval = arpc_send(es2, rpc, timeout); | |
990 | if (retval) | |
991 | goto out_arpc_del; | |
992 | ||
993 | retval = wait_for_completion_interruptible_timeout( | |
994 | &rpc->response_received, | |
995 | msecs_to_jiffies(timeout)); | |
996 | if (retval <= 0) { | |
997 | if (!retval) | |
998 | retval = -ETIMEDOUT; | |
999 | goto out_arpc_del; | |
1000 | } | |
1001 | ||
4ae2d962 | 1002 | if (rpc->resp->result) { |
c14118a8 | 1003 | retval = -EREMOTEIO; |
121bae2b JH |
1004 | if (result) |
1005 | *result = rpc->resp->result; | |
4ae2d962 | 1006 | } else { |
34873949 | 1007 | retval = 0; |
4ae2d962 | 1008 | } |
c14118a8 AB |
1009 | |
1010 | out_arpc_del: | |
1011 | spin_lock_irqsave(&es2->arpc_lock, flags); | |
1012 | arpc_del(es2, rpc); | |
1013 | spin_unlock_irqrestore(&es2->arpc_lock, flags); | |
1014 | arpc_free(rpc); | |
1015 | ||
1016 | if (retval < 0 && retval != -EREMOTEIO) { | |
1017 | dev_err(&es2->usb_dev->dev, | |
1018 | "failed to execute ARPC: %d\n", retval); | |
1019 | } | |
1020 | ||
1021 | return retval; | |
1022 | } | |
1023 | ||
9d9d3777 AB |
1024 | static void arpc_in_callback(struct urb *urb) |
1025 | { | |
c14118a8 | 1026 | struct es2_ap_dev *es2 = urb->context; |
9d9d3777 AB |
1027 | struct device *dev = &urb->dev->dev; |
1028 | int status = check_urb_status(urb); | |
c14118a8 AB |
1029 | struct arpc *rpc; |
1030 | struct arpc_response_message *resp; | |
1031 | unsigned long flags; | |
9d9d3777 AB |
1032 | int retval; |
1033 | ||
1034 | if (status) { | |
1035 | if ((status == -EAGAIN) || (status == -EPROTO)) | |
1036 | goto exit; | |
1037 | ||
1038 | /* The urb is being unlinked */ | |
1039 | if (status == -ENOENT || status == -ESHUTDOWN) | |
1040 | return; | |
1041 | ||
1042 | dev_err(dev, "arpc in-urb error %d (dropped)\n", status); | |
1043 | return; | |
1044 | } | |
1045 | ||
c14118a8 AB |
1046 | if (urb->actual_length < sizeof(*resp)) { |
1047 | dev_err(dev, "short aprc response received\n"); | |
1048 | goto exit; | |
1049 | } | |
1050 | ||
1051 | resp = urb->transfer_buffer; | |
1052 | spin_lock_irqsave(&es2->arpc_lock, flags); | |
165a74ab | 1053 | rpc = arpc_find(es2, resp->id); |
c14118a8 | 1054 | if (!rpc) { |
178457e1 JH |
1055 | dev_err(dev, "invalid arpc response id received: %u\n", |
1056 | le16_to_cpu(resp->id)); | |
c14118a8 AB |
1057 | spin_unlock_irqrestore(&es2->arpc_lock, flags); |
1058 | goto exit; | |
1059 | } | |
1060 | ||
1061 | arpc_del(es2, rpc); | |
1062 | memcpy(rpc->resp, resp, sizeof(*resp)); | |
1063 | complete(&rpc->response_received); | |
1064 | spin_unlock_irqrestore(&es2->arpc_lock, flags); | |
1065 | ||
9d9d3777 AB |
1066 | exit: |
1067 | /* put our urb back in the request pool */ | |
1068 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
1069 | if (retval) | |
1070 | dev_err(dev, "failed to resubmit arpc in-urb: %d\n", retval); | |
1071 | } | |
1072 | ||
c15ccabe | 1073 | #define APB1_LOG_MSG_SIZE 64 |
3be0e17d | 1074 | static void apb_log_get(struct es2_ap_dev *es2, char *buf) |
ca3ec299 | 1075 | { |
ca3ec299 GKH |
1076 | int retval; |
1077 | ||
ca3ec299 | 1078 | do { |
4b1d8204 | 1079 | retval = usb_control_msg(es2->usb_dev, |
8478c35a CS |
1080 | usb_rcvctrlpipe(es2->usb_dev, 0), |
1081 | GB_APB_REQUEST_LOG, | |
1082 | USB_DIR_IN | USB_TYPE_VENDOR | | |
1083 | USB_RECIP_INTERFACE, | |
1084 | 0x00, 0x00, | |
1085 | buf, | |
1086 | APB1_LOG_MSG_SIZE, | |
1087 | ES2_USB_CTRL_TIMEOUT); | |
ca3ec299 | 1088 | if (retval > 0) |
3be0e17d | 1089 | kfifo_in(&es2->apb_log_fifo, buf, retval); |
ca3ec299 GKH |
1090 | } while (retval > 0); |
1091 | } | |
1092 | ||
3be0e17d | 1093 | static int apb_log_poll(void *data) |
ca3ec299 | 1094 | { |
4b1d8204 | 1095 | struct es2_ap_dev *es2 = data; |
c15ccabe JH |
1096 | char *buf; |
1097 | ||
1098 | buf = kmalloc(APB1_LOG_MSG_SIZE, GFP_KERNEL); | |
1099 | if (!buf) | |
1100 | return -ENOMEM; | |
1101 | ||
ca3ec299 GKH |
1102 | while (!kthread_should_stop()) { |
1103 | msleep(1000); | |
3be0e17d | 1104 | apb_log_get(es2, buf); |
ca3ec299 | 1105 | } |
c15ccabe JH |
1106 | |
1107 | kfree(buf); | |
1108 | ||
ca3ec299 GKH |
1109 | return 0; |
1110 | } | |
1111 | ||
3be0e17d | 1112 | static ssize_t apb_log_read(struct file *f, char __user *buf, |
8478c35a | 1113 | size_t count, loff_t *ppos) |
ca3ec299 | 1114 | { |
45063097 | 1115 | struct es2_ap_dev *es2 = file_inode(f)->i_private; |
ca3ec299 GKH |
1116 | ssize_t ret; |
1117 | size_t copied; | |
1118 | char *tmp_buf; | |
1119 | ||
1120 | if (count > APB1_LOG_SIZE) | |
1121 | count = APB1_LOG_SIZE; | |
1122 | ||
1123 | tmp_buf = kmalloc(count, GFP_KERNEL); | |
1124 | if (!tmp_buf) | |
1125 | return -ENOMEM; | |
1126 | ||
3be0e17d | 1127 | copied = kfifo_out(&es2->apb_log_fifo, tmp_buf, count); |
ca3ec299 GKH |
1128 | ret = simple_read_from_buffer(buf, count, ppos, tmp_buf, copied); |
1129 | ||
1130 | kfree(tmp_buf); | |
1131 | ||
1132 | return ret; | |
1133 | } | |
1134 | ||
3be0e17d AE |
1135 | static const struct file_operations apb_log_fops = { |
1136 | .read = apb_log_read, | |
ca3ec299 GKH |
1137 | }; |
1138 | ||
4b1d8204 | 1139 | static void usb_log_enable(struct es2_ap_dev *es2) |
ca3ec299 | 1140 | { |
3be0e17d | 1141 | if (!IS_ERR_OR_NULL(es2->apb_log_task)) |
ca3ec299 GKH |
1142 | return; |
1143 | ||
1144 | /* get log from APB1 */ | |
3be0e17d AE |
1145 | es2->apb_log_task = kthread_run(apb_log_poll, es2, "apb_log"); |
1146 | if (IS_ERR(es2->apb_log_task)) | |
ca3ec299 | 1147 | return; |
3be0e17d | 1148 | /* XXX We will need to rename this per APB */ |
563a8412 | 1149 | es2->apb_log_dentry = debugfs_create_file("apb_log", 0444, |
8478c35a CS |
1150 | gb_debugfs_get(), es2, |
1151 | &apb_log_fops); | |
ca3ec299 GKH |
1152 | } |
1153 | ||
4b1d8204 | 1154 | static void usb_log_disable(struct es2_ap_dev *es2) |
ca3ec299 | 1155 | { |
3be0e17d | 1156 | if (IS_ERR_OR_NULL(es2->apb_log_task)) |
ca3ec299 GKH |
1157 | return; |
1158 | ||
3be0e17d AE |
1159 | debugfs_remove(es2->apb_log_dentry); |
1160 | es2->apb_log_dentry = NULL; | |
ca3ec299 | 1161 | |
3be0e17d AE |
1162 | kthread_stop(es2->apb_log_task); |
1163 | es2->apb_log_task = NULL; | |
ca3ec299 GKH |
1164 | } |
1165 | ||
3be0e17d | 1166 | static ssize_t apb_log_enable_read(struct file *f, char __user *buf, |
8478c35a | 1167 | size_t count, loff_t *ppos) |
ca3ec299 | 1168 | { |
45063097 | 1169 | struct es2_ap_dev *es2 = file_inode(f)->i_private; |
3be0e17d | 1170 | int enable = !IS_ERR_OR_NULL(es2->apb_log_task); |
4b1d8204 | 1171 | char tmp_buf[3]; |
ca3ec299 GKH |
1172 | |
1173 | sprintf(tmp_buf, "%d\n", enable); | |
012ac583 | 1174 | return simple_read_from_buffer(buf, count, ppos, tmp_buf, 2); |
ca3ec299 GKH |
1175 | } |
1176 | ||
3be0e17d | 1177 | static ssize_t apb_log_enable_write(struct file *f, const char __user *buf, |
8478c35a | 1178 | size_t count, loff_t *ppos) |
ca3ec299 GKH |
1179 | { |
1180 | int enable; | |
1181 | ssize_t retval; | |
45063097 | 1182 | struct es2_ap_dev *es2 = file_inode(f)->i_private; |
ca3ec299 GKH |
1183 | |
1184 | retval = kstrtoint_from_user(buf, count, 10, &enable); | |
1185 | if (retval) | |
1186 | return retval; | |
1187 | ||
1188 | if (enable) | |
4b1d8204 | 1189 | usb_log_enable(es2); |
ca3ec299 | 1190 | else |
4b1d8204 | 1191 | usb_log_disable(es2); |
ca3ec299 GKH |
1192 | |
1193 | return count; | |
1194 | } | |
1195 | ||
3be0e17d AE |
1196 | static const struct file_operations apb_log_enable_fops = { |
1197 | .read = apb_log_enable_read, | |
1198 | .write = apb_log_enable_write, | |
ca3ec299 GKH |
1199 | }; |
1200 | ||
3be0e17d | 1201 | static int apb_get_cport_count(struct usb_device *udev) |
24a6112f FP |
1202 | { |
1203 | int retval; | |
1204 | __le16 *cport_count; | |
1205 | ||
478ce720 | 1206 | cport_count = kzalloc(sizeof(*cport_count), GFP_KERNEL); |
24a6112f FP |
1207 | if (!cport_count) |
1208 | return -ENOMEM; | |
1209 | ||
1210 | retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
e5273381 | 1211 | GB_APB_REQUEST_CPORT_COUNT, |
24a6112f FP |
1212 | USB_DIR_IN | USB_TYPE_VENDOR | |
1213 | USB_RECIP_INTERFACE, 0, 0, cport_count, | |
60793c9b | 1214 | sizeof(*cport_count), ES2_USB_CTRL_TIMEOUT); |
478ce720 | 1215 | if (retval != sizeof(*cport_count)) { |
24a6112f FP |
1216 | dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n", |
1217 | retval); | |
478ce720 JH |
1218 | |
1219 | if (retval >= 0) | |
1220 | retval = -EIO; | |
1221 | ||
24a6112f FP |
1222 | goto out; |
1223 | } | |
1224 | ||
1225 | retval = le16_to_cpu(*cport_count); | |
1226 | ||
1227 | /* We need to fit a CPort ID in one byte of a message header */ | |
1228 | if (retval > U8_MAX) { | |
1229 | retval = U8_MAX; | |
1230 | dev_warn(&udev->dev, "Limiting number of CPorts to U8_MAX\n"); | |
1231 | } | |
1232 | ||
1233 | out: | |
1234 | kfree(cport_count); | |
1235 | return retval; | |
1236 | } | |
1237 | ||
f587027e | 1238 | /* |
4d5c446b JH |
1239 | * The ES2 USB Bridge device has 15 endpoints |
1240 | * 1 Control - usual USB stuff + AP -> APBridgeA messages | |
1241 | * 7 Bulk IN - CPort data in | |
1242 | * 7 Bulk OUT - CPort data out | |
f587027e GKH |
1243 | */ |
1244 | static int ap_probe(struct usb_interface *interface, | |
1245 | const struct usb_device_id *id) | |
1246 | { | |
4b1d8204 | 1247 | struct es2_ap_dev *es2; |
2537636a | 1248 | struct gb_host_device *hd; |
f587027e GKH |
1249 | struct usb_device *udev; |
1250 | struct usb_host_interface *iface_desc; | |
1251 | struct usb_endpoint_descriptor *endpoint; | |
27229100 | 1252 | __u8 ep_addr; |
be5d01f1 | 1253 | int retval; |
f587027e | 1254 | int i; |
24a6112f | 1255 | int num_cports; |
403074b5 | 1256 | bool bulk_out_found = false; |
7330c48e GKH |
1257 | bool bulk_in_found = false; |
1258 | bool arpc_in_found = false; | |
4bc1389d | 1259 | |
f587027e GKH |
1260 | udev = usb_get_dev(interface_to_usbdev(interface)); |
1261 | ||
3be0e17d | 1262 | num_cports = apb_get_cport_count(udev); |
24a6112f FP |
1263 | if (num_cports < 0) { |
1264 | usb_put_dev(udev); | |
1265 | dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n", | |
1266 | num_cports); | |
1267 | return num_cports; | |
1268 | } | |
1269 | ||
d6e139bc | 1270 | hd = gb_hd_create(&es2_driver, &udev->dev, ES2_GBUF_MSG_SIZE_MAX, |
8478c35a | 1271 | num_cports); |
8ea70fe0 | 1272 | if (IS_ERR(hd)) { |
f587027e | 1273 | usb_put_dev(udev); |
8ea70fe0 | 1274 | return PTR_ERR(hd); |
f587027e GKH |
1275 | } |
1276 | ||
4b1d8204 AE |
1277 | es2 = hd_to_es2(hd); |
1278 | es2->hd = hd; | |
1279 | es2->usb_intf = interface; | |
1280 | es2->usb_dev = udev; | |
1281 | spin_lock_init(&es2->cport_out_urb_lock); | |
3be0e17d | 1282 | INIT_KFIFO(es2->apb_log_fifo); |
4b1d8204 | 1283 | usb_set_intfdata(interface, es2); |
f587027e | 1284 | |
05061507 JH |
1285 | /* |
1286 | * Reserve the CDSI0 and CDSI1 CPorts so they won't be allocated | |
1287 | * dynamically. | |
1288 | */ | |
1289 | retval = gb_hd_cport_reserve(hd, ES2_CPORT_CDSI0); | |
1290 | if (retval) | |
1291 | goto error; | |
1292 | retval = gb_hd_cport_reserve(hd, ES2_CPORT_CDSI1); | |
1293 | if (retval) | |
1294 | goto error; | |
1295 | ||
4d5c446b | 1296 | /* find all bulk endpoints */ |
f587027e GKH |
1297 | iface_desc = interface->cur_altsetting; |
1298 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
1299 | endpoint = &iface_desc->endpoint[i].desc; | |
27229100 | 1300 | ep_addr = endpoint->bEndpointAddress; |
f587027e | 1301 | |
b767ee40 | 1302 | if (usb_endpoint_is_bulk_in(endpoint)) { |
7330c48e | 1303 | if (!bulk_in_found) { |
27229100 | 1304 | es2->cport_in.endpoint = ep_addr; |
7330c48e GKH |
1305 | bulk_in_found = true; |
1306 | } else if (!arpc_in_found) { | |
27229100 | 1307 | es2->arpc_endpoint_in = ep_addr; |
7330c48e | 1308 | arpc_in_found = true; |
27229100 GKH |
1309 | } else { |
1310 | dev_warn(&udev->dev, | |
1311 | "Unused bulk IN endpoint found: 0x%02x\n", | |
1312 | ep_addr); | |
7330c48e | 1313 | } |
27229100 | 1314 | continue; |
f587027e | 1315 | } |
27229100 GKH |
1316 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1317 | if (!bulk_out_found) { | |
1318 | es2->cport_out_endpoint = ep_addr; | |
1319 | bulk_out_found = true; | |
1320 | } else { | |
1321 | dev_warn(&udev->dev, | |
1322 | "Unused bulk OUT endpoint found: 0x%02x\n", | |
1323 | ep_addr); | |
1324 | } | |
1325 | continue; | |
1326 | } | |
1327 | dev_warn(&udev->dev, | |
1328 | "Unknown endpoint type found, address 0x%02x\n", | |
1329 | ep_addr); | |
f587027e | 1330 | } |
7330c48e | 1331 | if (!bulk_in_found || !arpc_in_found || !bulk_out_found) { |
f587027e | 1332 | dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n"); |
be5d01f1 | 1333 | retval = -ENODEV; |
f587027e GKH |
1334 | goto error; |
1335 | } | |
1336 | ||
0ce68ce4 | 1337 | /* Allocate buffers for our cport in messages */ |
7330c48e GKH |
1338 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
1339 | struct urb *urb; | |
1340 | u8 *buffer; | |
606addd2 | 1341 | |
7330c48e GKH |
1342 | urb = usb_alloc_urb(0, GFP_KERNEL); |
1343 | if (!urb) { | |
1344 | retval = -ENOMEM; | |
1345 | goto error; | |
1346 | } | |
1347 | es2->cport_in.urb[i] = urb; | |
5f62eab0 | 1348 | |
7330c48e GKH |
1349 | buffer = kmalloc(ES2_GBUF_MSG_SIZE_MAX, GFP_KERNEL); |
1350 | if (!buffer) { | |
1351 | retval = -ENOMEM; | |
1352 | goto error; | |
1353 | } | |
606addd2 | 1354 | |
7330c48e GKH |
1355 | usb_fill_bulk_urb(urb, udev, |
1356 | usb_rcvbulkpipe(udev, es2->cport_in.endpoint), | |
1357 | buffer, ES2_GBUF_MSG_SIZE_MAX, | |
1358 | cport_in_callback, hd); | |
5f62eab0 | 1359 | |
7330c48e | 1360 | es2->cport_in.buffer[i] = buffer; |
f587027e GKH |
1361 | } |
1362 | ||
9d9d3777 AB |
1363 | /* Allocate buffers for ARPC in messages */ |
1364 | for (i = 0; i < NUM_ARPC_IN_URB; ++i) { | |
1365 | struct urb *urb; | |
1366 | u8 *buffer; | |
1367 | ||
1368 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
1369 | if (!urb) { | |
1370 | retval = -ENOMEM; | |
1371 | goto error; | |
1372 | } | |
5f62eab0 JH |
1373 | es2->arpc_urb[i] = urb; |
1374 | ||
9d9d3777 AB |
1375 | buffer = kmalloc(ARPC_IN_SIZE_MAX, GFP_KERNEL); |
1376 | if (!buffer) { | |
1377 | retval = -ENOMEM; | |
1378 | goto error; | |
1379 | } | |
1380 | ||
1381 | usb_fill_bulk_urb(urb, udev, | |
1382 | usb_rcvbulkpipe(udev, | |
1383 | es2->arpc_endpoint_in), | |
1384 | buffer, ARPC_IN_SIZE_MAX, | |
1385 | arpc_in_callback, es2); | |
1386 | ||
9d9d3777 AB |
1387 | es2->arpc_buffer[i] = buffer; |
1388 | } | |
1389 | ||
f587027e GKH |
1390 | /* Allocate urbs for our CPort OUT messages */ |
1391 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { | |
1392 | struct urb *urb; | |
1393 | ||
1394 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
be5d01f1 JH |
1395 | if (!urb) { |
1396 | retval = -ENOMEM; | |
f587027e | 1397 | goto error; |
be5d01f1 | 1398 | } |
f587027e | 1399 | |
4b1d8204 AE |
1400 | es2->cport_out_urb[i] = urb; |
1401 | es2->cport_out_urb_busy[i] = false; /* just to be anal */ | |
f587027e GKH |
1402 | } |
1403 | ||
3be0e17d AE |
1404 | /* XXX We will need to rename this per APB */ |
1405 | es2->apb_log_enable_dentry = debugfs_create_file("apb_log_enable", | |
8478c35a CS |
1406 | 0644, |
1407 | gb_debugfs_get(), es2, | |
1408 | &apb_log_enable_fops); | |
0ce68ce4 | 1409 | |
c14118a8 AB |
1410 | INIT_LIST_HEAD(&es2->arpcs); |
1411 | spin_lock_init(&es2->arpc_lock); | |
1412 | ||
1305f2b2 WY |
1413 | retval = es2_arpc_in_enable(es2); |
1414 | if (retval) | |
9d9d3777 AB |
1415 | goto error; |
1416 | ||
c1700479 JH |
1417 | retval = gb_hd_add(hd); |
1418 | if (retval) | |
9d9d3777 | 1419 | goto err_disable_arpc_in; |
c1700479 | 1420 | |
7330c48e GKH |
1421 | retval = es2_cport_in_enable(es2, &es2->cport_in); |
1422 | if (retval) | |
1423 | goto err_hd_del; | |
0ce68ce4 | 1424 | |
f587027e | 1425 | return 0; |
57bc17ff | 1426 | |
7330c48e | 1427 | err_hd_del: |
c1700479 | 1428 | gb_hd_del(hd); |
9d9d3777 AB |
1429 | err_disable_arpc_in: |
1430 | es2_arpc_in_disable(es2); | |
f587027e | 1431 | error: |
57bc17ff | 1432 | es2_destroy(es2); |
f587027e GKH |
1433 | |
1434 | return retval; | |
1435 | } | |
1436 | ||
2437f1c6 VK |
1437 | static void ap_disconnect(struct usb_interface *interface) |
1438 | { | |
1439 | struct es2_ap_dev *es2 = usb_get_intfdata(interface); | |
2437f1c6 VK |
1440 | |
1441 | gb_hd_del(es2->hd); | |
1442 | ||
7330c48e | 1443 | es2_cport_in_disable(es2, &es2->cport_in); |
9d9d3777 | 1444 | es2_arpc_in_disable(es2); |
2437f1c6 VK |
1445 | |
1446 | es2_destroy(es2); | |
1447 | } | |
1448 | ||
4b1d8204 | 1449 | static struct usb_driver es2_ap_driver = { |
c13c8bf0 | 1450 | .name = "es2_ap_driver", |
f587027e GKH |
1451 | .probe = ap_probe, |
1452 | .disconnect = ap_disconnect, | |
1453 | .id_table = id_table, | |
a0f997bd | 1454 | .soft_unbind = 1, |
f587027e GKH |
1455 | }; |
1456 | ||
4b1d8204 | 1457 | module_usb_driver(es2_ap_driver); |
f587027e | 1458 | |
6cf42a44 | 1459 | MODULE_LICENSE("GPL v2"); |
f587027e | 1460 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |