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b164935b AK |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2008 Cavium Networks | |
6570b4a9 AK |
7 | * |
8 | * Some parts of the code were originally released under BSD license: | |
9 | * | |
10 | * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights | |
11 | * reserved. | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions are | |
15 | * met: | |
16 | * | |
17 | * * Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * | |
20 | * * Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials provided | |
23 | * with the distribution. | |
24 | * | |
25 | * * Neither the name of Cavium Networks nor the names of | |
26 | * its contributors may be used to endorse or promote products | |
27 | * derived from this software without specific prior written | |
28 | * permission. | |
29 | * | |
30 | * This Software, including technical data, may be subject to U.S. export | |
31 | * control laws, including the U.S. Export Administration Act and its associated | |
32 | * regulations, and may be subject to export or import regulations in other | |
33 | * countries. | |
34 | * | |
35 | * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" | |
36 | * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR | |
37 | * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO | |
38 | * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION | |
39 | * OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM | |
40 | * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, | |
41 | * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF | |
42 | * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR | |
43 | * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR | |
44 | * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. | |
b164935b AK |
45 | */ |
46 | #include <linux/kernel.h> | |
47 | #include <linux/module.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/pci.h> | |
50 | #include <linux/interrupt.h> | |
51 | #include <linux/platform_device.h> | |
b164935b AK |
52 | #include <linux/usb.h> |
53 | ||
2a81d2b0 AK |
54 | #include <linux/time.h> |
55 | #include <linux/delay.h> | |
b164935b AK |
56 | |
57 | #include <asm/octeon/cvmx.h> | |
b164935b AK |
58 | #include <asm/octeon/cvmx-iob-defs.h> |
59 | ||
60 | #include <linux/usb/hcd.h> | |
61 | ||
55fa328a DN |
62 | #include <linux/err.h> |
63 | ||
6570b4a9 AK |
64 | #include <asm/octeon/octeon.h> |
65 | #include <asm/octeon/cvmx-helper.h> | |
66 | #include <asm/octeon/cvmx-sysinfo.h> | |
67 | #include <asm/octeon/cvmx-helper-board.h> | |
68 | ||
f1219103 | 69 | #include "octeon-hcd.h" |
6570b4a9 AK |
70 | |
71 | /** | |
72 | * enum cvmx_usb_speed - the possible USB device speeds | |
73 | * | |
74 | * @CVMX_USB_SPEED_HIGH: Device is operation at 480Mbps | |
75 | * @CVMX_USB_SPEED_FULL: Device is operation at 12Mbps | |
76 | * @CVMX_USB_SPEED_LOW: Device is operation at 1.5Mbps | |
77 | */ | |
78 | enum cvmx_usb_speed { | |
79 | CVMX_USB_SPEED_HIGH = 0, | |
80 | CVMX_USB_SPEED_FULL = 1, | |
81 | CVMX_USB_SPEED_LOW = 2, | |
82 | }; | |
83 | ||
84 | /** | |
85 | * enum cvmx_usb_transfer - the possible USB transfer types | |
86 | * | |
87 | * @CVMX_USB_TRANSFER_CONTROL: USB transfer type control for hub and status | |
88 | * transfers | |
89 | * @CVMX_USB_TRANSFER_ISOCHRONOUS: USB transfer type isochronous for low | |
90 | * priority periodic transfers | |
91 | * @CVMX_USB_TRANSFER_BULK: USB transfer type bulk for large low priority | |
92 | * transfers | |
93 | * @CVMX_USB_TRANSFER_INTERRUPT: USB transfer type interrupt for high priority | |
94 | * periodic transfers | |
95 | */ | |
96 | enum cvmx_usb_transfer { | |
97 | CVMX_USB_TRANSFER_CONTROL = 0, | |
98 | CVMX_USB_TRANSFER_ISOCHRONOUS = 1, | |
99 | CVMX_USB_TRANSFER_BULK = 2, | |
100 | CVMX_USB_TRANSFER_INTERRUPT = 3, | |
101 | }; | |
102 | ||
103 | /** | |
104 | * enum cvmx_usb_direction - the transfer directions | |
105 | * | |
106 | * @CVMX_USB_DIRECTION_OUT: Data is transferring from Octeon to the device/host | |
107 | * @CVMX_USB_DIRECTION_IN: Data is transferring from the device/host to Octeon | |
108 | */ | |
109 | enum cvmx_usb_direction { | |
110 | CVMX_USB_DIRECTION_OUT, | |
111 | CVMX_USB_DIRECTION_IN, | |
112 | }; | |
113 | ||
114 | /** | |
115 | * enum cvmx_usb_complete - possible callback function status codes | |
116 | * | |
117 | * @CVMX_USB_COMPLETE_SUCCESS: The transaction / operation finished without | |
118 | * any errors | |
119 | * @CVMX_USB_COMPLETE_SHORT: FIXME: This is currently not implemented | |
120 | * @CVMX_USB_COMPLETE_CANCEL: The transaction was canceled while in flight | |
121 | * by a user call to cvmx_usb_cancel | |
122 | * @CVMX_USB_COMPLETE_ERROR: The transaction aborted with an unexpected | |
123 | * error status | |
124 | * @CVMX_USB_COMPLETE_STALL: The transaction received a USB STALL response | |
125 | * from the device | |
126 | * @CVMX_USB_COMPLETE_XACTERR: The transaction failed with an error from the | |
127 | * device even after a number of retries | |
128 | * @CVMX_USB_COMPLETE_DATATGLERR: The transaction failed with a data toggle | |
129 | * error even after a number of retries | |
130 | * @CVMX_USB_COMPLETE_BABBLEERR: The transaction failed with a babble error | |
131 | * @CVMX_USB_COMPLETE_FRAMEERR: The transaction failed with a frame error | |
132 | * even after a number of retries | |
133 | */ | |
134 | enum cvmx_usb_complete { | |
135 | CVMX_USB_COMPLETE_SUCCESS, | |
136 | CVMX_USB_COMPLETE_SHORT, | |
137 | CVMX_USB_COMPLETE_CANCEL, | |
138 | CVMX_USB_COMPLETE_ERROR, | |
139 | CVMX_USB_COMPLETE_STALL, | |
140 | CVMX_USB_COMPLETE_XACTERR, | |
141 | CVMX_USB_COMPLETE_DATATGLERR, | |
142 | CVMX_USB_COMPLETE_BABBLEERR, | |
143 | CVMX_USB_COMPLETE_FRAMEERR, | |
144 | }; | |
145 | ||
146 | /** | |
147 | * struct cvmx_usb_port_status - the USB port status information | |
148 | * | |
149 | * @port_enabled: 1 = Usb port is enabled, 0 = disabled | |
150 | * @port_over_current: 1 = Over current detected, 0 = Over current not | |
151 | * detected. Octeon doesn't support over current detection. | |
152 | * @port_powered: 1 = Port power is being supplied to the device, 0 = | |
153 | * power is off. Octeon doesn't support turning port power | |
154 | * off. | |
155 | * @port_speed: Current port speed. | |
156 | * @connected: 1 = A device is connected to the port, 0 = No device is | |
157 | * connected. | |
158 | * @connect_change: 1 = Device connected state changed since the last set | |
159 | * status call. | |
160 | */ | |
161 | struct cvmx_usb_port_status { | |
162 | uint32_t reserved : 25; | |
163 | uint32_t port_enabled : 1; | |
164 | uint32_t port_over_current : 1; | |
165 | uint32_t port_powered : 1; | |
166 | enum cvmx_usb_speed port_speed : 2; | |
167 | uint32_t connected : 1; | |
168 | uint32_t connect_change : 1; | |
169 | }; | |
170 | ||
171 | /** | |
172 | * union cvmx_usb_control_header - the structure of a Control packet header | |
173 | * | |
174 | * @s.request_type: Bit 7 tells the direction: 1=IN, 0=OUT | |
175 | * @s.request The standard usb request to make | |
176 | * @s.value Value parameter for the request in little endian format | |
177 | * @s.index Index for the request in little endian format | |
178 | * @s.length Length of the data associated with this request in | |
179 | * little endian format | |
180 | */ | |
181 | union cvmx_usb_control_header { | |
182 | uint64_t u64; | |
183 | struct { | |
184 | uint64_t request_type : 8; | |
185 | uint64_t request : 8; | |
186 | uint64_t value : 16; | |
187 | uint64_t index : 16; | |
188 | uint64_t length : 16; | |
189 | } s; | |
190 | }; | |
191 | ||
192 | /** | |
193 | * struct cvmx_usb_iso_packet - descriptor for Isochronous packets | |
194 | * | |
195 | * @offset: This is the offset in bytes into the main buffer where this data | |
196 | * is stored. | |
197 | * @length: This is the length in bytes of the data. | |
198 | * @status: This is the status of this individual packet transfer. | |
199 | */ | |
200 | struct cvmx_usb_iso_packet { | |
201 | int offset; | |
202 | int length; | |
203 | enum cvmx_usb_complete status; | |
204 | }; | |
205 | ||
6570b4a9 AK |
206 | /** |
207 | * enum cvmx_usb_initialize_flags - flags used by the initialization function | |
208 | * | |
209 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal | |
210 | * as clock source at USB_XO and | |
211 | * USB_XI. | |
212 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND: The USB port uses 12/24/48MHz 2.5V | |
213 | * board clock source at USB_XO. | |
214 | * USB_XI should be tied to GND. | |
215 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK: Mask for clock speed field | |
216 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: Speed of reference clock or | |
217 | * crystal | |
218 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: Speed of reference clock | |
219 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: Speed of reference clock | |
220 | * @CVMX_USB_INITIALIZE_FLAGS_NO_DMA: Disable DMA and used polled IO for | |
221 | * data transfer use for the USB | |
222 | */ | |
223 | enum cvmx_usb_initialize_flags { | |
224 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1 << 0, | |
225 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1 << 1, | |
226 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3 << 3, | |
227 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1 << 3, | |
228 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2 << 3, | |
229 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3 << 3, | |
230 | /* Bits 3-4 used to encode the clock frequency */ | |
231 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1 << 5, | |
232 | }; | |
233 | ||
234 | /** | |
235 | * enum cvmx_usb_pipe_flags - internal flags for a pipe. | |
236 | * | |
6570b4a9 AK |
237 | * @__CVMX_USB_PIPE_FLAGS_SCHEDULED: Used internally to determine if a pipe is |
238 | * actively using hardware. Do not use. | |
239 | * @__CVMX_USB_PIPE_FLAGS_NEED_PING: Used internally to determine if a high | |
240 | * speed pipe is in the ping state. Do not | |
241 | * use. | |
242 | */ | |
243 | enum cvmx_usb_pipe_flags { | |
6570b4a9 AK |
244 | __CVMX_USB_PIPE_FLAGS_SCHEDULED = 1 << 17, |
245 | __CVMX_USB_PIPE_FLAGS_NEED_PING = 1 << 18, | |
246 | }; | |
247 | ||
248 | /* Normal prefetch that use the pref instruction. */ | |
249 | #define CVMX_PREFETCH(address, offset) asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0)) | |
250 | ||
251 | /* Maximum number of times to retry failed transactions */ | |
252 | #define MAX_RETRIES 3 | |
253 | ||
6570b4a9 AK |
254 | /* Maximum number of hardware channels supported by the USB block */ |
255 | #define MAX_CHANNELS 8 | |
256 | ||
257 | /* The highest valid USB device address */ | |
258 | #define MAX_USB_ADDRESS 127 | |
259 | ||
260 | /* The highest valid USB endpoint number */ | |
261 | #define MAX_USB_ENDPOINT 15 | |
262 | ||
263 | /* The highest valid port number on a hub */ | |
264 | #define MAX_USB_HUB_PORT 15 | |
265 | ||
266 | /* | |
267 | * The low level hardware can transfer a maximum of this number of bytes in each | |
268 | * transfer. The field is 19 bits wide | |
269 | */ | |
270 | #define MAX_TRANSFER_BYTES ((1<<19)-1) | |
271 | ||
272 | /* | |
273 | * The low level hardware can transfer a maximum of this number of packets in | |
274 | * each transfer. The field is 10 bits wide | |
275 | */ | |
276 | #define MAX_TRANSFER_PACKETS ((1<<10)-1) | |
277 | ||
6570b4a9 AK |
278 | /** |
279 | * Logical transactions may take numerous low level | |
280 | * transactions, especially when splits are concerned. This | |
281 | * enum represents all of the possible stages a transaction can | |
282 | * be in. Note that split completes are always even. This is so | |
283 | * the NAK handler can backup to the previous low level | |
284 | * transaction with a simple clearing of bit 0. | |
285 | */ | |
286 | enum cvmx_usb_stage { | |
287 | CVMX_USB_STAGE_NON_CONTROL, | |
288 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE, | |
289 | CVMX_USB_STAGE_SETUP, | |
290 | CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE, | |
291 | CVMX_USB_STAGE_DATA, | |
292 | CVMX_USB_STAGE_DATA_SPLIT_COMPLETE, | |
293 | CVMX_USB_STAGE_STATUS, | |
294 | CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE, | |
295 | }; | |
296 | ||
297 | /** | |
298 | * struct cvmx_usb_transaction - describes each pending USB transaction | |
299 | * regardless of type. These are linked together | |
300 | * to form a list of pending requests for a pipe. | |
301 | * | |
5669601d | 302 | * @node: List node for transactions in the pipe. |
6570b4a9 AK |
303 | * @type: Type of transaction, duplicated of the pipe. |
304 | * @flags: State flags for this transaction. | |
305 | * @buffer: User's physical buffer address to read/write. | |
306 | * @buffer_length: Size of the user's buffer in bytes. | |
307 | * @control_header: For control transactions, physical address of the 8 | |
308 | * byte standard header. | |
309 | * @iso_start_frame: For ISO transactions, the starting frame number. | |
310 | * @iso_number_packets: For ISO transactions, the number of packets in the | |
311 | * request. | |
312 | * @iso_packets: For ISO transactions, the sub packets in the request. | |
313 | * @actual_bytes: Actual bytes transfer for this transaction. | |
314 | * @stage: For control transactions, the current stage. | |
0cce1004 | 315 | * @urb: URB. |
6570b4a9 AK |
316 | */ |
317 | struct cvmx_usb_transaction { | |
5669601d | 318 | struct list_head node; |
6570b4a9 | 319 | enum cvmx_usb_transfer type; |
6570b4a9 AK |
320 | uint64_t buffer; |
321 | int buffer_length; | |
322 | uint64_t control_header; | |
323 | int iso_start_frame; | |
324 | int iso_number_packets; | |
325 | struct cvmx_usb_iso_packet *iso_packets; | |
326 | int xfersize; | |
327 | int pktcnt; | |
328 | int retries; | |
329 | int actual_bytes; | |
330 | enum cvmx_usb_stage stage; | |
0cce1004 | 331 | struct urb *urb; |
6570b4a9 AK |
332 | }; |
333 | ||
334 | /** | |
335 | * struct cvmx_usb_pipe - a pipe represents a virtual connection between Octeon | |
336 | * and some USB device. It contains a list of pending | |
337 | * request to the device. | |
338 | * | |
4a23ee1b | 339 | * @node: List node for pipe list |
6570b4a9 | 340 | * @next: Pipe after this one in the list |
5669601d | 341 | * @transactions: List of pending transactions |
6570b4a9 AK |
342 | * @interval: For periodic pipes, the interval between packets in |
343 | * frames | |
344 | * @next_tx_frame: The next frame this pipe is allowed to transmit on | |
345 | * @flags: State flags for this pipe | |
346 | * @device_speed: Speed of device connected to this pipe | |
347 | * @transfer_type: Type of transaction supported by this pipe | |
348 | * @transfer_dir: IN or OUT. Ignored for Control | |
349 | * @multi_count: Max packet in a row for the device | |
350 | * @max_packet: The device's maximum packet size in bytes | |
351 | * @device_addr: USB device address at other end of pipe | |
352 | * @endpoint_num: USB endpoint number at other end of pipe | |
353 | * @hub_device_addr: Hub address this device is connected to | |
354 | * @hub_port: Hub port this device is connected to | |
355 | * @pid_toggle: This toggles between 0/1 on every packet send to track | |
356 | * the data pid needed | |
357 | * @channel: Hardware DMA channel for this pipe | |
358 | * @split_sc_frame: The low order bits of the frame number the split | |
359 | * complete should be sent on | |
360 | */ | |
361 | struct cvmx_usb_pipe { | |
4a23ee1b | 362 | struct list_head node; |
5669601d | 363 | struct list_head transactions; |
6570b4a9 AK |
364 | uint64_t interval; |
365 | uint64_t next_tx_frame; | |
366 | enum cvmx_usb_pipe_flags flags; | |
367 | enum cvmx_usb_speed device_speed; | |
368 | enum cvmx_usb_transfer transfer_type; | |
369 | enum cvmx_usb_direction transfer_dir; | |
370 | int multi_count; | |
371 | uint16_t max_packet; | |
372 | uint8_t device_addr; | |
373 | uint8_t endpoint_num; | |
374 | uint8_t hub_device_addr; | |
375 | uint8_t hub_port; | |
376 | uint8_t pid_toggle; | |
377 | uint8_t channel; | |
378 | int8_t split_sc_frame; | |
379 | }; | |
380 | ||
6570b4a9 AK |
381 | struct cvmx_usb_tx_fifo { |
382 | struct { | |
383 | int channel; | |
384 | int size; | |
385 | uint64_t address; | |
386 | } entry[MAX_CHANNELS+1]; | |
387 | int head; | |
388 | int tail; | |
389 | }; | |
390 | ||
391 | /** | |
cb61c600 | 392 | * struct cvmx_usb_state - the state of the USB block |
6570b4a9 AK |
393 | * |
394 | * init_flags: Flags passed to initialize. | |
395 | * index: Which USB block this is for. | |
396 | * idle_hardware_channels: Bit set for every idle hardware channel. | |
397 | * usbcx_hprt: Stored port status so we don't need to read a CSR to | |
398 | * determine splits. | |
399 | * pipe_for_channel: Map channels to pipes. | |
6570b4a9 | 400 | * pipe: Storage for pipes. |
6570b4a9 AK |
401 | * indent: Used by debug output to indent functions. |
402 | * port_status: Last port status used for change notification. | |
6570b4a9 AK |
403 | * idle_pipes: List of open pipes that have no transactions. |
404 | * active_pipes: Active pipes indexed by transfer type. | |
405 | * frame_number: Increments every SOF interrupt for time keeping. | |
406 | * active_split: Points to the current active split, or NULL. | |
407 | */ | |
cb61c600 | 408 | struct cvmx_usb_state { |
6570b4a9 AK |
409 | int init_flags; |
410 | int index; | |
411 | int idle_hardware_channels; | |
412 | union cvmx_usbcx_hprt usbcx_hprt; | |
413 | struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS]; | |
6570b4a9 AK |
414 | int indent; |
415 | struct cvmx_usb_port_status port_status; | |
4a23ee1b AK |
416 | struct list_head idle_pipes; |
417 | struct list_head active_pipes[4]; | |
6570b4a9 AK |
418 | uint64_t frame_number; |
419 | struct cvmx_usb_transaction *active_split; | |
420 | struct cvmx_usb_tx_fifo periodic; | |
421 | struct cvmx_usb_tx_fifo nonperiodic; | |
422 | }; | |
423 | ||
b164935b | 424 | struct octeon_hcd { |
771378bb | 425 | spinlock_t lock; |
a24ed35a | 426 | struct cvmx_usb_state usb; |
771378bb AK |
427 | struct tasklet_struct dequeue_tasklet; |
428 | struct list_head dequeue_list; | |
b164935b AK |
429 | }; |
430 | ||
6570b4a9 AK |
431 | /* This macro spins on a field waiting for it to reach a value */ |
432 | #define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\ | |
433 | ({int result; \ | |
434 | do { \ | |
435 | uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \ | |
436 | octeon_get_clock_rate() / 1000000; \ | |
437 | type c; \ | |
438 | while (1) { \ | |
439 | c.u32 = __cvmx_usb_read_csr32(usb, address); \ | |
440 | if (c.s.field op (value)) { \ | |
441 | result = 0; \ | |
442 | break; \ | |
443 | } else if (cvmx_get_cycle() > done) { \ | |
444 | result = -1; \ | |
445 | break; \ | |
446 | } else \ | |
447 | cvmx_wait(100); \ | |
448 | } \ | |
449 | } while (0); \ | |
450 | result; }) | |
451 | ||
452 | /* | |
453 | * This macro logically sets a single field in a CSR. It does the sequence | |
454 | * read, modify, and write | |
455 | */ | |
456 | #define USB_SET_FIELD32(address, type, field, value) \ | |
457 | do { \ | |
458 | type c; \ | |
459 | c.u32 = __cvmx_usb_read_csr32(usb, address); \ | |
460 | c.s.field = value; \ | |
461 | __cvmx_usb_write_csr32(usb, address, c.u32); \ | |
462 | } while (0) | |
463 | ||
464 | /* Returns the IO address to push/pop stuff data from the FIFOs */ | |
465 | #define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000) | |
466 | ||
6570b4a9 AK |
467 | /** |
468 | * Read a USB 32bit CSR. It performs the necessary address swizzle | |
469 | * for 32bit CSRs and logs the value in a readable format if | |
470 | * debugging is on. | |
471 | * | |
472 | * @usb: USB block this access is for | |
473 | * @address: 64bit address to read | |
474 | * | |
475 | * Returns: Result of the read | |
476 | */ | |
cb61c600 | 477 | static inline uint32_t __cvmx_usb_read_csr32(struct cvmx_usb_state *usb, |
6570b4a9 AK |
478 | uint64_t address) |
479 | { | |
480 | uint32_t result = cvmx_read64_uint32(address ^ 4); | |
481 | return result; | |
482 | } | |
483 | ||
484 | ||
485 | /** | |
486 | * Write a USB 32bit CSR. It performs the necessary address | |
487 | * swizzle for 32bit CSRs and logs the value in a readable format | |
488 | * if debugging is on. | |
489 | * | |
490 | * @usb: USB block this access is for | |
491 | * @address: 64bit address to write | |
492 | * @value: Value to write | |
493 | */ | |
cb61c600 | 494 | static inline void __cvmx_usb_write_csr32(struct cvmx_usb_state *usb, |
6570b4a9 AK |
495 | uint64_t address, uint32_t value) |
496 | { | |
497 | cvmx_write64_uint32(address ^ 4, value); | |
498 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); | |
499 | } | |
500 | ||
501 | ||
502 | /** | |
503 | * Read a USB 64bit CSR. It logs the value in a readable format if | |
504 | * debugging is on. | |
505 | * | |
506 | * @usb: USB block this access is for | |
507 | * @address: 64bit address to read | |
508 | * | |
509 | * Returns: Result of the read | |
510 | */ | |
cb61c600 | 511 | static inline uint64_t __cvmx_usb_read_csr64(struct cvmx_usb_state *usb, |
6570b4a9 AK |
512 | uint64_t address) |
513 | { | |
514 | uint64_t result = cvmx_read64_uint64(address); | |
515 | return result; | |
516 | } | |
517 | ||
518 | ||
519 | /** | |
520 | * Write a USB 64bit CSR. It logs the value in a readable format | |
521 | * if debugging is on. | |
522 | * | |
523 | * @usb: USB block this access is for | |
524 | * @address: 64bit address to write | |
525 | * @value: Value to write | |
526 | */ | |
cb61c600 | 527 | static inline void __cvmx_usb_write_csr64(struct cvmx_usb_state *usb, |
6570b4a9 AK |
528 | uint64_t address, uint64_t value) |
529 | { | |
530 | cvmx_write64_uint64(address, value); | |
531 | } | |
532 | ||
533 | /** | |
534 | * Return non zero if this pipe connects to a non HIGH speed | |
535 | * device through a high speed hub. | |
536 | * | |
537 | * @usb: USB block this access is for | |
538 | * @pipe: Pipe to check | |
539 | * | |
540 | * Returns: Non zero if we need to do split transactions | |
541 | */ | |
cb61c600 AK |
542 | static inline int __cvmx_usb_pipe_needs_split(struct cvmx_usb_state *usb, |
543 | struct cvmx_usb_pipe *pipe) | |
6570b4a9 | 544 | { |
aa87afe2 AK |
545 | return pipe->device_speed != CVMX_USB_SPEED_HIGH && |
546 | usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH; | |
6570b4a9 AK |
547 | } |
548 | ||
549 | ||
550 | /** | |
551 | * Trivial utility function to return the correct PID for a pipe | |
552 | * | |
553 | * @pipe: pipe to check | |
554 | * | |
555 | * Returns: PID for pipe | |
556 | */ | |
557 | static inline int __cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe) | |
558 | { | |
559 | if (pipe->pid_toggle) | |
560 | return 2; /* Data1 */ | |
561 | else | |
562 | return 0; /* Data0 */ | |
563 | } | |
564 | ||
6570b4a9 AK |
565 | /** |
566 | * Initialize a USB port for use. This must be called before any | |
567 | * other access to the Octeon USB port is made. The port starts | |
568 | * off in the disabled state. | |
569 | * | |
cb61c600 | 570 | * @usb: Pointer to an empty struct cvmx_usb_state |
6570b4a9 AK |
571 | * that will be populated by the initialize call. |
572 | * This structure is then passed to all other USB | |
573 | * functions. | |
574 | * @usb_port_number: | |
575 | * Which Octeon USB port to initialize. | |
576 | * | |
577 | * Returns: 0 or a negative error code. | |
578 | */ | |
cb61c600 | 579 | static int cvmx_usb_initialize(struct cvmx_usb_state *usb, |
b91619c2 DD |
580 | int usb_port_number, |
581 | enum cvmx_usb_initialize_flags flags) | |
6570b4a9 AK |
582 | { |
583 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; | |
584 | union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status; | |
4a23ee1b | 585 | int i; |
6570b4a9 | 586 | |
6570b4a9 AK |
587 | /* At first allow 0-1 for the usb port number */ |
588 | if ((usb_port_number < 0) || (usb_port_number > 1)) | |
589 | return -EINVAL; | |
6570b4a9 AK |
590 | |
591 | memset(usb, 0, sizeof(*usb)); | |
592 | usb->init_flags = flags; | |
593 | ||
594 | /* Initialize the USB state structure */ | |
d2695a8a | 595 | usb->index = usb_port_number; |
4a23ee1b AK |
596 | INIT_LIST_HEAD(&usb->idle_pipes); |
597 | for (i = 0; i < ARRAY_SIZE(usb->active_pipes); i++) | |
598 | INIT_LIST_HEAD(&usb->active_pipes[i]); | |
6570b4a9 AK |
599 | |
600 | /* | |
601 | * Power On Reset and PHY Initialization | |
602 | * | |
603 | * 1. Wait for DCOK to assert (nothing to do) | |
604 | * | |
605 | * 2a. Write USBN0/1_CLK_CTL[POR] = 1 and | |
606 | * USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 | |
607 | */ | |
608 | usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); | |
609 | usbn_clk_ctl.s.por = 1; | |
610 | usbn_clk_ctl.s.hrst = 0; | |
611 | usbn_clk_ctl.s.prst = 0; | |
612 | usbn_clk_ctl.s.hclk_rst = 0; | |
613 | usbn_clk_ctl.s.enable = 0; | |
614 | /* | |
615 | * 2b. Select the USB reference clock/crystal parameters by writing | |
616 | * appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] | |
617 | */ | |
618 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) { | |
619 | /* | |
620 | * The USB port uses 12/24/48MHz 2.5V board clock | |
621 | * source at USB_XO. USB_XI should be tied to GND. | |
622 | * Most Octeon evaluation boards require this setting | |
623 | */ | |
7d7bc26b AK |
624 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || |
625 | OCTEON_IS_MODEL(OCTEON_CN56XX) || | |
626 | OCTEON_IS_MODEL(OCTEON_CN50XX)) | |
627 | /* From CN56XX,CN50XX,CN31XX,CN30XX manuals */ | |
628 | usbn_clk_ctl.s.p_rtype = 2; /* p_rclk=1 & p_xenbn=0 */ | |
6570b4a9 AK |
629 | else |
630 | /* From CN52XX manual */ | |
34b70b9e | 631 | usbn_clk_ctl.s.p_rtype = 1; |
6570b4a9 AK |
632 | |
633 | switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) { | |
634 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: | |
635 | usbn_clk_ctl.s.p_c_sel = 0; | |
636 | break; | |
637 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: | |
638 | usbn_clk_ctl.s.p_c_sel = 1; | |
639 | break; | |
640 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: | |
641 | usbn_clk_ctl.s.p_c_sel = 2; | |
642 | break; | |
643 | } | |
644 | } else { | |
645 | /* | |
646 | * The USB port uses a 12MHz crystal as clock source | |
647 | * at USB_XO and USB_XI | |
648 | */ | |
7d7bc26b | 649 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) |
6570b4a9 | 650 | /* From CN31XX,CN30XX manual */ |
7d7bc26b | 651 | usbn_clk_ctl.s.p_rtype = 3; /* p_rclk=1 & p_xenbn=1 */ |
6570b4a9 | 652 | else |
7d7bc26b | 653 | /* From CN56XX,CN52XX,CN50XX manuals. */ |
34b70b9e | 654 | usbn_clk_ctl.s.p_rtype = 0; |
6570b4a9 AK |
655 | |
656 | usbn_clk_ctl.s.p_c_sel = 0; | |
657 | } | |
658 | /* | |
659 | * 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and | |
660 | * setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down | |
661 | * such that USB is as close as possible to 125Mhz | |
662 | */ | |
663 | { | |
664 | int divisor = (octeon_get_clock_rate()+125000000-1)/125000000; | |
665 | /* Lower than 4 doesn't seem to work properly */ | |
666 | if (divisor < 4) | |
667 | divisor = 4; | |
668 | usbn_clk_ctl.s.divide = divisor; | |
669 | usbn_clk_ctl.s.divide2 = 0; | |
670 | } | |
671 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
672 | usbn_clk_ctl.u64); | |
673 | /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */ | |
674 | usbn_clk_ctl.s.hclk_rst = 1; | |
675 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
676 | usbn_clk_ctl.u64); | |
677 | /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */ | |
678 | cvmx_wait(64); | |
679 | /* | |
680 | * 3. Program the power-on reset field in the USBN clock-control | |
681 | * register: | |
682 | * USBN_CLK_CTL[POR] = 0 | |
683 | */ | |
684 | usbn_clk_ctl.s.por = 0; | |
685 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
686 | usbn_clk_ctl.u64); | |
687 | /* 4. Wait 1 ms for PHY clock to start */ | |
688 | mdelay(1); | |
689 | /* | |
690 | * 5. Program the Reset input from automatic test equipment field in the | |
691 | * USBP control and status register: | |
692 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 1 | |
693 | */ | |
694 | usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index)); | |
695 | usbn_usbp_ctl_status.s.ate_reset = 1; | |
696 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), | |
697 | usbn_usbp_ctl_status.u64); | |
698 | /* 6. Wait 10 cycles */ | |
699 | cvmx_wait(10); | |
700 | /* | |
701 | * 7. Clear ATE_RESET field in the USBN clock-control register: | |
702 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 0 | |
703 | */ | |
704 | usbn_usbp_ctl_status.s.ate_reset = 0; | |
705 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), | |
706 | usbn_usbp_ctl_status.u64); | |
707 | /* | |
708 | * 8. Program the PHY reset field in the USBN clock-control register: | |
709 | * USBN_CLK_CTL[PRST] = 1 | |
710 | */ | |
711 | usbn_clk_ctl.s.prst = 1; | |
712 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
713 | usbn_clk_ctl.u64); | |
714 | /* | |
715 | * 9. Program the USBP control and status register to select host or | |
716 | * device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for | |
717 | * device | |
718 | */ | |
719 | usbn_usbp_ctl_status.s.hst_mode = 0; | |
720 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), | |
721 | usbn_usbp_ctl_status.u64); | |
722 | /* 10. Wait 1 us */ | |
723 | udelay(1); | |
724 | /* | |
725 | * 11. Program the hreset_n field in the USBN clock-control register: | |
726 | * USBN_CLK_CTL[HRST] = 1 | |
727 | */ | |
728 | usbn_clk_ctl.s.hrst = 1; | |
729 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
730 | usbn_clk_ctl.u64); | |
731 | /* 12. Proceed to USB core initialization */ | |
732 | usbn_clk_ctl.s.enable = 1; | |
733 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
734 | usbn_clk_ctl.u64); | |
735 | udelay(1); | |
736 | ||
737 | /* | |
738 | * USB Core Initialization | |
739 | * | |
740 | * 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to | |
741 | * determine USB core configuration parameters. | |
742 | * | |
743 | * Nothing needed | |
744 | * | |
745 | * 2. Program the following fields in the global AHB configuration | |
746 | * register (USBC_GAHBCFG) | |
747 | * DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode | |
748 | * Burst length, USBC_GAHBCFG[HBSTLEN] = 0 | |
749 | * Nonperiodic TxFIFO empty level (slave mode only), | |
750 | * USBC_GAHBCFG[NPTXFEMPLVL] | |
751 | * Periodic TxFIFO empty level (slave mode only), | |
752 | * USBC_GAHBCFG[PTXFEMPLVL] | |
753 | * Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 | |
754 | */ | |
755 | { | |
756 | union cvmx_usbcx_gahbcfg usbcx_gahbcfg; | |
757 | /* Due to an errata, CN31XX doesn't support DMA */ | |
758 | if (OCTEON_IS_MODEL(OCTEON_CN31XX)) | |
759 | usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA; | |
760 | usbcx_gahbcfg.u32 = 0; | |
761 | usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA); | |
762 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
763 | /* Only use one channel with non DMA */ | |
764 | usb->idle_hardware_channels = 0x1; | |
765 | else if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) | |
766 | /* CN5XXX have an errata with channel 3 */ | |
767 | usb->idle_hardware_channels = 0xf7; | |
768 | else | |
769 | usb->idle_hardware_channels = 0xff; | |
770 | usbcx_gahbcfg.s.hbstlen = 0; | |
771 | usbcx_gahbcfg.s.nptxfemplvl = 1; | |
772 | usbcx_gahbcfg.s.ptxfemplvl = 1; | |
773 | usbcx_gahbcfg.s.glblintrmsk = 1; | |
774 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index), | |
775 | usbcx_gahbcfg.u32); | |
776 | } | |
777 | /* | |
778 | * 3. Program the following fields in USBC_GUSBCFG register. | |
779 | * HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0 | |
780 | * ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0 | |
781 | * USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5 | |
782 | * PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 | |
783 | */ | |
784 | { | |
785 | union cvmx_usbcx_gusbcfg usbcx_gusbcfg; | |
786 | usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index)); | |
787 | usbcx_gusbcfg.s.toutcal = 0; | |
788 | usbcx_gusbcfg.s.ddrsel = 0; | |
789 | usbcx_gusbcfg.s.usbtrdtim = 0x5; | |
790 | usbcx_gusbcfg.s.phylpwrclksel = 0; | |
791 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index), | |
792 | usbcx_gusbcfg.u32); | |
793 | } | |
794 | /* | |
795 | * 4. The software must unmask the following bits in the USBC_GINTMSK | |
796 | * register. | |
797 | * OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1 | |
798 | * Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 | |
799 | */ | |
800 | { | |
801 | union cvmx_usbcx_gintmsk usbcx_gintmsk; | |
802 | int channel; | |
803 | ||
804 | usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index)); | |
805 | usbcx_gintmsk.s.otgintmsk = 1; | |
806 | usbcx_gintmsk.s.modemismsk = 1; | |
807 | usbcx_gintmsk.s.hchintmsk = 1; | |
808 | usbcx_gintmsk.s.sofmsk = 0; | |
809 | /* We need RX FIFO interrupts if we don't have DMA */ | |
810 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
811 | usbcx_gintmsk.s.rxflvlmsk = 1; | |
812 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index), | |
813 | usbcx_gintmsk.u32); | |
814 | ||
815 | /* | |
816 | * Disable all channel interrupts. We'll enable them per channel | |
817 | * later. | |
818 | */ | |
819 | for (channel = 0; channel < 8; channel++) | |
820 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); | |
821 | } | |
822 | ||
823 | { | |
824 | /* | |
825 | * Host Port Initialization | |
826 | * | |
827 | * 1. Program the host-port interrupt-mask field to unmask, | |
828 | * USBC_GINTMSK[PRTINT] = 1 | |
829 | */ | |
830 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, | |
831 | prtintmsk, 1); | |
832 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, | |
833 | disconnintmsk, 1); | |
834 | /* | |
835 | * 2. Program the USBC_HCFG register to select full-speed host | |
836 | * or high-speed host. | |
837 | */ | |
838 | { | |
839 | union cvmx_usbcx_hcfg usbcx_hcfg; | |
840 | usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index)); | |
841 | usbcx_hcfg.s.fslssupp = 0; | |
842 | usbcx_hcfg.s.fslspclksel = 0; | |
843 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32); | |
844 | } | |
845 | /* | |
846 | * 3. Program the port power bit to drive VBUS on the USB, | |
847 | * USBC_HPRT[PRTPWR] = 1 | |
848 | */ | |
849 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtpwr, 1); | |
850 | ||
851 | /* | |
852 | * Steps 4-15 from the manual are done later in the port enable | |
853 | */ | |
854 | } | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | ||
860 | /** | |
861 | * Shutdown a USB port after a call to cvmx_usb_initialize(). | |
862 | * The port should be disabled with all pipes closed when this | |
863 | * function is called. | |
864 | * | |
cb61c600 | 865 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
866 | * |
867 | * Returns: 0 or a negative error code. | |
868 | */ | |
cb61c600 | 869 | static int cvmx_usb_shutdown(struct cvmx_usb_state *usb) |
6570b4a9 AK |
870 | { |
871 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; | |
6570b4a9 AK |
872 | |
873 | /* Make sure all pipes are closed */ | |
4a23ee1b AK |
874 | if (!list_empty(&usb->idle_pipes) || |
875 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS]) || | |
876 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT]) || | |
877 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_CONTROL]) || | |
878 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_BULK])) | |
6570b4a9 AK |
879 | return -EBUSY; |
880 | ||
881 | /* Disable the clocks and put them in power on reset */ | |
882 | usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); | |
883 | usbn_clk_ctl.s.enable = 1; | |
884 | usbn_clk_ctl.s.por = 1; | |
885 | usbn_clk_ctl.s.hclk_rst = 1; | |
886 | usbn_clk_ctl.s.prst = 0; | |
887 | usbn_clk_ctl.s.hrst = 0; | |
888 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
889 | usbn_clk_ctl.u64); | |
890 | return 0; | |
891 | } | |
892 | ||
893 | ||
894 | /** | |
895 | * Enable a USB port. After this call succeeds, the USB port is | |
896 | * online and servicing requests. | |
897 | * | |
cb61c600 | 898 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
899 | * |
900 | * Returns: 0 or a negative error code. | |
901 | */ | |
cb61c600 | 902 | static int cvmx_usb_enable(struct cvmx_usb_state *usb) |
6570b4a9 AK |
903 | { |
904 | union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3; | |
6570b4a9 AK |
905 | |
906 | usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
907 | ||
908 | /* | |
909 | * If the port is already enabled the just return. We don't need to do | |
910 | * anything | |
911 | */ | |
912 | if (usb->usbcx_hprt.s.prtena) | |
913 | return 0; | |
914 | ||
915 | /* If there is nothing plugged into the port then fail immediately */ | |
916 | if (!usb->usbcx_hprt.s.prtconnsts) { | |
917 | return -ETIMEDOUT; | |
918 | } | |
919 | ||
920 | /* Program the port reset bit to start the reset process */ | |
921 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 1); | |
922 | ||
923 | /* | |
924 | * Wait at least 50ms (high speed), or 10ms (full speed) for the reset | |
925 | * process to complete. | |
926 | */ | |
927 | mdelay(50); | |
928 | ||
929 | /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */ | |
930 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 0); | |
931 | ||
932 | /* Wait for the USBC_HPRT[PRTENA]. */ | |
933 | if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, | |
934 | prtena, ==, 1, 100000)) | |
935 | return -ETIMEDOUT; | |
936 | ||
937 | /* | |
938 | * Read the port speed field to get the enumerated speed, | |
939 | * USBC_HPRT[PRTSPD]. | |
940 | */ | |
941 | usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
942 | usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index)); | |
943 | ||
944 | /* | |
945 | * 13. Program the USBC_GRXFSIZ register to select the size of the | |
946 | * receive FIFO (25%). | |
947 | */ | |
948 | USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), union cvmx_usbcx_grxfsiz, | |
949 | rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4); | |
950 | /* | |
951 | * 14. Program the USBC_GNPTXFSIZ register to select the size and the | |
952 | * start address of the non- periodic transmit FIFO for nonperiodic | |
953 | * transactions (50%). | |
954 | */ | |
955 | { | |
956 | union cvmx_usbcx_gnptxfsiz siz; | |
957 | siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index)); | |
958 | siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2; | |
959 | siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4; | |
960 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32); | |
961 | } | |
962 | /* | |
963 | * 15. Program the USBC_HPTXFSIZ register to select the size and start | |
964 | * address of the periodic transmit FIFO for periodic transactions | |
965 | * (25%). | |
966 | */ | |
967 | { | |
968 | union cvmx_usbcx_hptxfsiz siz; | |
969 | siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index)); | |
970 | siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4; | |
971 | siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4; | |
972 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32); | |
973 | } | |
974 | /* Flush all FIFOs */ | |
975 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfnum, 0x10); | |
976 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfflsh, 1); | |
977 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, | |
978 | txfflsh, ==, 0, 100); | |
979 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, rxfflsh, 1); | |
980 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, | |
981 | rxfflsh, ==, 0, 100); | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
986 | ||
987 | /** | |
988 | * Disable a USB port. After this call the USB port will not | |
989 | * generate data transfers and will not generate events. | |
990 | * Transactions in process will fail and call their | |
991 | * associated callbacks. | |
992 | * | |
cb61c600 | 993 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
994 | * |
995 | * Returns: 0 or a negative error code. | |
996 | */ | |
cb61c600 | 997 | static int cvmx_usb_disable(struct cvmx_usb_state *usb) |
6570b4a9 | 998 | { |
6570b4a9 AK |
999 | /* Disable the port */ |
1000 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtena, 1); | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | ||
1005 | /** | |
1006 | * Get the current state of the USB port. Use this call to | |
1007 | * determine if the usb port has anything connected, is enabled, | |
1008 | * or has some sort of error condition. The return value of this | |
1009 | * call has "changed" bits to signal of the value of some fields | |
29a202fa | 1010 | * have changed between calls. |
6570b4a9 | 1011 | * |
cb61c600 | 1012 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1013 | * |
1014 | * Returns: Port status information | |
1015 | */ | |
cb61c600 | 1016 | static struct cvmx_usb_port_status cvmx_usb_get_status(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1017 | { |
1018 | union cvmx_usbcx_hprt usbc_hprt; | |
1019 | struct cvmx_usb_port_status result; | |
6570b4a9 AK |
1020 | |
1021 | memset(&result, 0, sizeof(result)); | |
1022 | ||
1023 | usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
1024 | result.port_enabled = usbc_hprt.s.prtena; | |
1025 | result.port_over_current = usbc_hprt.s.prtovrcurract; | |
1026 | result.port_powered = usbc_hprt.s.prtpwr; | |
1027 | result.port_speed = usbc_hprt.s.prtspd; | |
1028 | result.connected = usbc_hprt.s.prtconnsts; | |
1029 | result.connect_change = (result.connected != usb->port_status.connected); | |
1030 | ||
1031 | return result; | |
1032 | } | |
1033 | ||
6570b4a9 AK |
1034 | /** |
1035 | * Open a virtual pipe between the host and a USB device. A pipe | |
1036 | * must be opened before data can be transferred between a device | |
1037 | * and Octeon. | |
1038 | * | |
cb61c600 | 1039 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1040 | * @device_addr: |
1041 | * USB device address to open the pipe to | |
1042 | * (0-127). | |
1043 | * @endpoint_num: | |
1044 | * USB endpoint number to open the pipe to | |
1045 | * (0-15). | |
1046 | * @device_speed: | |
1047 | * The speed of the device the pipe is going | |
1048 | * to. This must match the device's speed, | |
1049 | * which may be different than the port speed. | |
1050 | * @max_packet: The maximum packet length the device can | |
1051 | * transmit/receive (low speed=0-8, full | |
1052 | * speed=0-1023, high speed=0-1024). This value | |
1053 | * comes from the standard endpoint descriptor | |
1054 | * field wMaxPacketSize bits <10:0>. | |
1055 | * @transfer_type: | |
1056 | * The type of transfer this pipe is for. | |
1057 | * @transfer_dir: | |
1058 | * The direction the pipe is in. This is not | |
1059 | * used for control pipes. | |
1060 | * @interval: For ISOCHRONOUS and INTERRUPT transfers, | |
1061 | * this is how often the transfer is scheduled | |
1062 | * for. All other transfers should specify | |
1063 | * zero. The units are in frames (8000/sec at | |
1064 | * high speed, 1000/sec for full speed). | |
1065 | * @multi_count: | |
1066 | * For high speed devices, this is the maximum | |
1067 | * allowed number of packet per microframe. | |
1068 | * Specify zero for non high speed devices. This | |
1069 | * value comes from the standard endpoint descriptor | |
1070 | * field wMaxPacketSize bits <12:11>. | |
1071 | * @hub_device_addr: | |
1072 | * Hub device address this device is connected | |
1073 | * to. Devices connected directly to Octeon | |
1074 | * use zero. This is only used when the device | |
1075 | * is full/low speed behind a high speed hub. | |
1076 | * The address will be of the high speed hub, | |
1077 | * not and full speed hubs after it. | |
1078 | * @hub_port: Which port on the hub the device is | |
1079 | * connected. Use zero for devices connected | |
1080 | * directly to Octeon. Like hub_device_addr, | |
1081 | * this is only used for full/low speed | |
1082 | * devices behind a high speed hub. | |
1083 | * | |
60f81507 | 1084 | * Returns: A non-NULL value is a pipe. NULL means an error. |
6570b4a9 | 1085 | */ |
60f81507 AK |
1086 | static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb, |
1087 | int device_addr, int | |
1088 | endpoint_num, | |
1089 | enum cvmx_usb_speed | |
1090 | device_speed, | |
1091 | int max_packet, | |
1092 | enum cvmx_usb_transfer | |
1093 | transfer_type, | |
1094 | enum cvmx_usb_direction | |
1095 | transfer_dir, | |
1096 | int interval, int multi_count, | |
1097 | int hub_device_addr, | |
1098 | int hub_port) | |
6570b4a9 AK |
1099 | { |
1100 | struct cvmx_usb_pipe *pipe; | |
6570b4a9 AK |
1101 | |
1102 | if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS))) | |
60f81507 | 1103 | return NULL; |
6570b4a9 | 1104 | if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT))) |
60f81507 | 1105 | return NULL; |
6570b4a9 | 1106 | if (unlikely(device_speed > CVMX_USB_SPEED_LOW)) |
60f81507 | 1107 | return NULL; |
6570b4a9 | 1108 | if (unlikely((max_packet <= 0) || (max_packet > 1024))) |
60f81507 | 1109 | return NULL; |
6570b4a9 | 1110 | if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT)) |
60f81507 | 1111 | return NULL; |
6570b4a9 AK |
1112 | if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) && |
1113 | (transfer_dir != CVMX_USB_DIRECTION_IN))) | |
60f81507 | 1114 | return NULL; |
6570b4a9 | 1115 | if (unlikely(interval < 0)) |
60f81507 | 1116 | return NULL; |
6570b4a9 | 1117 | if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval)) |
60f81507 | 1118 | return NULL; |
6570b4a9 | 1119 | if (unlikely(multi_count < 0)) |
60f81507 | 1120 | return NULL; |
6570b4a9 AK |
1121 | if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) && |
1122 | (multi_count != 0))) | |
60f81507 | 1123 | return NULL; |
6570b4a9 | 1124 | if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS))) |
60f81507 | 1125 | return NULL; |
6570b4a9 | 1126 | if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT))) |
60f81507 | 1127 | return NULL; |
6570b4a9 | 1128 | |
d2695a8a | 1129 | pipe = kzalloc(sizeof(*pipe), GFP_ATOMIC); |
6570b4a9 | 1130 | if (!pipe) |
60f81507 | 1131 | return NULL; |
6570b4a9 AK |
1132 | if ((device_speed == CVMX_USB_SPEED_HIGH) && |
1133 | (transfer_dir == CVMX_USB_DIRECTION_OUT) && | |
1134 | (transfer_type == CVMX_USB_TRANSFER_BULK)) | |
1135 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; | |
1136 | pipe->device_addr = device_addr; | |
1137 | pipe->endpoint_num = endpoint_num; | |
1138 | pipe->device_speed = device_speed; | |
1139 | pipe->max_packet = max_packet; | |
1140 | pipe->transfer_type = transfer_type; | |
1141 | pipe->transfer_dir = transfer_dir; | |
5669601d AK |
1142 | INIT_LIST_HEAD(&pipe->transactions); |
1143 | ||
6570b4a9 AK |
1144 | /* |
1145 | * All pipes use interval to rate limit NAK processing. Force an | |
1146 | * interval if one wasn't supplied | |
1147 | */ | |
1148 | if (!interval) | |
1149 | interval = 1; | |
1150 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1151 | pipe->interval = interval*8; | |
1152 | /* Force start splits to be schedule on uFrame 0 */ | |
1153 | pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval; | |
1154 | } else { | |
1155 | pipe->interval = interval; | |
1156 | pipe->next_tx_frame = usb->frame_number + pipe->interval; | |
1157 | } | |
1158 | pipe->multi_count = multi_count; | |
1159 | pipe->hub_device_addr = hub_device_addr; | |
1160 | pipe->hub_port = hub_port; | |
1161 | pipe->pid_toggle = 0; | |
1162 | pipe->split_sc_frame = -1; | |
4a23ee1b | 1163 | list_add_tail(&pipe->node, &usb->idle_pipes); |
6570b4a9 AK |
1164 | |
1165 | /* | |
1166 | * We don't need to tell the hardware about this pipe yet since | |
1167 | * it doesn't have any submitted requests | |
1168 | */ | |
1169 | ||
60f81507 | 1170 | return pipe; |
6570b4a9 AK |
1171 | } |
1172 | ||
1173 | ||
1174 | /** | |
1175 | * Poll the RX FIFOs and remove data as needed. This function is only used | |
1176 | * in non DMA mode. It is very important that this function be called quickly | |
1177 | * enough to prevent FIFO overflow. | |
1178 | * | |
cb61c600 | 1179 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 | 1180 | */ |
cb61c600 | 1181 | static void __cvmx_usb_poll_rx_fifo(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1182 | { |
1183 | union cvmx_usbcx_grxstsph rx_status; | |
1184 | int channel; | |
1185 | int bytes; | |
1186 | uint64_t address; | |
1187 | uint32_t *ptr; | |
1188 | ||
1189 | rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index)); | |
1190 | /* Only read data if IN data is there */ | |
1191 | if (rx_status.s.pktsts != 2) | |
1192 | return; | |
1193 | /* Check if no data is available */ | |
1194 | if (!rx_status.s.bcnt) | |
1195 | return; | |
1196 | ||
1197 | channel = rx_status.s.chnum; | |
1198 | bytes = rx_status.s.bcnt; | |
1199 | if (!bytes) | |
1200 | return; | |
1201 | ||
1202 | /* Get where the DMA engine would have written this data */ | |
1203 | address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8); | |
1204 | ptr = cvmx_phys_to_ptr(address); | |
1205 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes); | |
1206 | ||
1207 | /* Loop writing the FIFO data for this packet into memory */ | |
1208 | while (bytes > 0) { | |
1209 | *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index)); | |
1210 | bytes -= 4; | |
1211 | } | |
1212 | CVMX_SYNCW; | |
1213 | ||
1214 | return; | |
1215 | } | |
1216 | ||
1217 | ||
1218 | /** | |
1219 | * Fill the TX hardware fifo with data out of the software | |
1220 | * fifos | |
1221 | * | |
cb61c600 | 1222 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1223 | * @fifo: Software fifo to use |
1224 | * @available: Amount of space in the hardware fifo | |
1225 | * | |
1226 | * Returns: Non zero if the hardware fifo was too small and needs | |
1227 | * to be serviced again. | |
1228 | */ | |
cb61c600 AK |
1229 | static int __cvmx_usb_fill_tx_hw(struct cvmx_usb_state *usb, |
1230 | struct cvmx_usb_tx_fifo *fifo, int available) | |
6570b4a9 AK |
1231 | { |
1232 | /* | |
1233 | * We're done either when there isn't anymore space or the software FIFO | |
1234 | * is empty | |
1235 | */ | |
1236 | while (available && (fifo->head != fifo->tail)) { | |
1237 | int i = fifo->tail; | |
1238 | const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address); | |
1239 | uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4; | |
1240 | int words = available; | |
1241 | ||
1242 | /* Limit the amount of data to waht the SW fifo has */ | |
1243 | if (fifo->entry[i].size <= available) { | |
1244 | words = fifo->entry[i].size; | |
1245 | fifo->tail++; | |
1246 | if (fifo->tail > MAX_CHANNELS) | |
1247 | fifo->tail = 0; | |
1248 | } | |
1249 | ||
1250 | /* Update the next locations and counts */ | |
1251 | available -= words; | |
1252 | fifo->entry[i].address += words * 4; | |
1253 | fifo->entry[i].size -= words; | |
1254 | ||
1255 | /* | |
1256 | * Write the HW fifo data. The read every three writes is due | |
1257 | * to an errata on CN3XXX chips | |
1258 | */ | |
1259 | while (words > 3) { | |
1260 | cvmx_write64_uint32(csr_address, *ptr++); | |
1261 | cvmx_write64_uint32(csr_address, *ptr++); | |
1262 | cvmx_write64_uint32(csr_address, *ptr++); | |
1263 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); | |
1264 | words -= 3; | |
1265 | } | |
1266 | cvmx_write64_uint32(csr_address, *ptr++); | |
1267 | if (--words) { | |
1268 | cvmx_write64_uint32(csr_address, *ptr++); | |
1269 | if (--words) | |
1270 | cvmx_write64_uint32(csr_address, *ptr++); | |
1271 | } | |
1272 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); | |
1273 | } | |
1274 | return fifo->head != fifo->tail; | |
1275 | } | |
1276 | ||
1277 | ||
1278 | /** | |
1279 | * Check the hardware FIFOs and fill them as needed | |
1280 | * | |
cb61c600 | 1281 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 | 1282 | */ |
cb61c600 | 1283 | static void __cvmx_usb_poll_tx_fifo(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1284 | { |
1285 | if (usb->periodic.head != usb->periodic.tail) { | |
1286 | union cvmx_usbcx_hptxsts tx_status; | |
1287 | tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index)); | |
1288 | if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail)) | |
1289 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 1); | |
1290 | else | |
1291 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 0); | |
1292 | } | |
1293 | ||
1294 | if (usb->nonperiodic.head != usb->nonperiodic.tail) { | |
1295 | union cvmx_usbcx_gnptxsts tx_status; | |
1296 | tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index)); | |
1297 | if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail)) | |
1298 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 1); | |
1299 | else | |
1300 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 0); | |
1301 | } | |
1302 | ||
1303 | return; | |
1304 | } | |
1305 | ||
1306 | ||
1307 | /** | |
1308 | * Fill the TX FIFO with an outgoing packet | |
1309 | * | |
cb61c600 | 1310 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1311 | * @channel: Channel number to get packet from |
1312 | */ | |
cb61c600 | 1313 | static void __cvmx_usb_fill_tx_fifo(struct cvmx_usb_state *usb, int channel) |
6570b4a9 AK |
1314 | { |
1315 | union cvmx_usbcx_hccharx hcchar; | |
1316 | union cvmx_usbcx_hcspltx usbc_hcsplt; | |
1317 | union cvmx_usbcx_hctsizx usbc_hctsiz; | |
1318 | struct cvmx_usb_tx_fifo *fifo; | |
1319 | ||
1320 | /* We only need to fill data on outbound channels */ | |
1321 | hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); | |
1322 | if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT) | |
1323 | return; | |
1324 | ||
1325 | /* OUT Splits only have data on the start and not the complete */ | |
1326 | usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index)); | |
1327 | if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt) | |
1328 | return; | |
1329 | ||
1330 | /* | |
1331 | * Find out how many bytes we need to fill and convert it into 32bit | |
1332 | * words. | |
1333 | */ | |
1334 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); | |
1335 | if (!usbc_hctsiz.s.xfersize) | |
1336 | return; | |
1337 | ||
1338 | if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) || | |
1339 | (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS)) | |
1340 | fifo = &usb->periodic; | |
1341 | else | |
1342 | fifo = &usb->nonperiodic; | |
1343 | ||
1344 | fifo->entry[fifo->head].channel = channel; | |
1345 | fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8); | |
1346 | fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2; | |
1347 | fifo->head++; | |
1348 | if (fifo->head > MAX_CHANNELS) | |
1349 | fifo->head = 0; | |
1350 | ||
1351 | __cvmx_usb_poll_tx_fifo(usb); | |
1352 | ||
1353 | return; | |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * Perform channel specific setup for Control transactions. All | |
1358 | * the generic stuff will already have been done in | |
1359 | * __cvmx_usb_start_channel() | |
1360 | * | |
cb61c600 | 1361 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1362 | * @channel: Channel to setup |
1363 | * @pipe: Pipe for control transaction | |
1364 | */ | |
cb61c600 | 1365 | static void __cvmx_usb_start_channel_control(struct cvmx_usb_state *usb, |
6570b4a9 AK |
1366 | int channel, |
1367 | struct cvmx_usb_pipe *pipe) | |
1368 | { | |
5669601d AK |
1369 | struct cvmx_usb_transaction *transaction = |
1370 | list_first_entry(&pipe->transactions, typeof(*transaction), | |
1371 | node); | |
6570b4a9 AK |
1372 | union cvmx_usb_control_header *header = |
1373 | cvmx_phys_to_ptr(transaction->control_header); | |
1374 | int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes; | |
1375 | int packets_to_transfer; | |
1376 | union cvmx_usbcx_hctsizx usbc_hctsiz; | |
1377 | ||
1378 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); | |
1379 | ||
1380 | switch (transaction->stage) { | |
1381 | case CVMX_USB_STAGE_NON_CONTROL: | |
1382 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: | |
1383 | cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__); | |
1384 | break; | |
1385 | case CVMX_USB_STAGE_SETUP: | |
1386 | usbc_hctsiz.s.pid = 3; /* Setup */ | |
1387 | bytes_to_transfer = sizeof(*header); | |
1388 | /* All Control operations start with a setup going OUT */ | |
1389 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT); | |
1390 | /* | |
1391 | * Setup send the control header instead of the buffer data. The | |
1392 | * buffer data will be used in the next stage | |
1393 | */ | |
1394 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header); | |
1395 | break; | |
1396 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: | |
1397 | usbc_hctsiz.s.pid = 3; /* Setup */ | |
1398 | bytes_to_transfer = 0; | |
1399 | /* All Control operations start with a setup going OUT */ | |
1400 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT); | |
1401 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); | |
1402 | break; | |
1403 | case CVMX_USB_STAGE_DATA: | |
1404 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1405 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1406 | if (header->s.request_type & 0x80) | |
1407 | bytes_to_transfer = 0; | |
1408 | else if (bytes_to_transfer > pipe->max_packet) | |
1409 | bytes_to_transfer = pipe->max_packet; | |
1410 | } | |
1411 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), | |
1412 | union cvmx_usbcx_hccharx, epdir, | |
1413 | ((header->s.request_type & 0x80) ? | |
1414 | CVMX_USB_DIRECTION_IN : | |
1415 | CVMX_USB_DIRECTION_OUT)); | |
1416 | break; | |
1417 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: | |
1418 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1419 | if (!(header->s.request_type & 0x80)) | |
1420 | bytes_to_transfer = 0; | |
1421 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), | |
1422 | union cvmx_usbcx_hccharx, epdir, | |
1423 | ((header->s.request_type & 0x80) ? | |
1424 | CVMX_USB_DIRECTION_IN : | |
1425 | CVMX_USB_DIRECTION_OUT)); | |
1426 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); | |
1427 | break; | |
1428 | case CVMX_USB_STAGE_STATUS: | |
1429 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1430 | bytes_to_transfer = 0; | |
1431 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, | |
1432 | ((header->s.request_type & 0x80) ? | |
1433 | CVMX_USB_DIRECTION_OUT : | |
1434 | CVMX_USB_DIRECTION_IN)); | |
1435 | break; | |
1436 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: | |
1437 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1438 | bytes_to_transfer = 0; | |
1439 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, | |
1440 | ((header->s.request_type & 0x80) ? | |
1441 | CVMX_USB_DIRECTION_OUT : | |
1442 | CVMX_USB_DIRECTION_IN)); | |
1443 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); | |
1444 | break; | |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * Make sure the transfer never exceeds the byte limit of the hardware. | |
1449 | * Further bytes will be sent as continued transactions | |
1450 | */ | |
1451 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { | |
1452 | /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */ | |
1453 | bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; | |
1454 | bytes_to_transfer *= pipe->max_packet; | |
1455 | } | |
1456 | ||
1457 | /* | |
1458 | * Calculate the number of packets to transfer. If the length is zero | |
1459 | * we still need to transfer one packet | |
1460 | */ | |
1461 | packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet; | |
1462 | if (packets_to_transfer == 0) | |
1463 | packets_to_transfer = 1; | |
1464 | else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { | |
1465 | /* | |
1466 | * Limit to one packet when not using DMA. Channels must be | |
1467 | * restarted between every packet for IN transactions, so there | |
1468 | * is no reason to do multiple packets in a row | |
1469 | */ | |
1470 | packets_to_transfer = 1; | |
1471 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1472 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { | |
1473 | /* | |
1474 | * Limit the number of packet and data transferred to what the | |
1475 | * hardware can handle | |
1476 | */ | |
1477 | packets_to_transfer = MAX_TRANSFER_PACKETS; | |
1478 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1479 | } | |
1480 | ||
1481 | usbc_hctsiz.s.xfersize = bytes_to_transfer; | |
1482 | usbc_hctsiz.s.pktcnt = packets_to_transfer; | |
1483 | ||
1484 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32); | |
1485 | return; | |
1486 | } | |
1487 | ||
1488 | ||
1489 | /** | |
1490 | * Start a channel to perform the pipe's head transaction | |
1491 | * | |
cb61c600 | 1492 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1493 | * @channel: Channel to setup |
1494 | * @pipe: Pipe to start | |
1495 | */ | |
cb61c600 | 1496 | static void __cvmx_usb_start_channel(struct cvmx_usb_state *usb, |
6570b4a9 AK |
1497 | int channel, |
1498 | struct cvmx_usb_pipe *pipe) | |
1499 | { | |
5669601d AK |
1500 | struct cvmx_usb_transaction *transaction = |
1501 | list_first_entry(&pipe->transactions, typeof(*transaction), | |
1502 | node); | |
6570b4a9 AK |
1503 | |
1504 | /* Make sure all writes to the DMA region get flushed */ | |
1505 | CVMX_SYNCW; | |
1506 | ||
1507 | /* Attach the channel to the pipe */ | |
1508 | usb->pipe_for_channel[channel] = pipe; | |
1509 | pipe->channel = channel; | |
1510 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED; | |
1511 | ||
1512 | /* Mark this channel as in use */ | |
1513 | usb->idle_hardware_channels &= ~(1<<channel); | |
1514 | ||
1515 | /* Enable the channel interrupt bits */ | |
1516 | { | |
1517 | union cvmx_usbcx_hcintx usbc_hcint; | |
1518 | union cvmx_usbcx_hcintmskx usbc_hcintmsk; | |
1519 | union cvmx_usbcx_haintmsk usbc_haintmsk; | |
1520 | ||
1521 | /* Clear all channel status bits */ | |
1522 | usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index)); | |
1523 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32); | |
1524 | ||
1525 | usbc_hcintmsk.u32 = 0; | |
1526 | usbc_hcintmsk.s.chhltdmsk = 1; | |
1527 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { | |
1528 | /* | |
1529 | * Channels need these extra interrupts when we aren't | |
1530 | * in DMA mode. | |
1531 | */ | |
1532 | usbc_hcintmsk.s.datatglerrmsk = 1; | |
1533 | usbc_hcintmsk.s.frmovrunmsk = 1; | |
1534 | usbc_hcintmsk.s.bblerrmsk = 1; | |
1535 | usbc_hcintmsk.s.xacterrmsk = 1; | |
1536 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1537 | /* | |
1538 | * Splits don't generate xfercompl, so we need | |
1539 | * ACK and NYET. | |
1540 | */ | |
1541 | usbc_hcintmsk.s.nyetmsk = 1; | |
1542 | usbc_hcintmsk.s.ackmsk = 1; | |
1543 | } | |
1544 | usbc_hcintmsk.s.nakmsk = 1; | |
1545 | usbc_hcintmsk.s.stallmsk = 1; | |
1546 | usbc_hcintmsk.s.xfercomplmsk = 1; | |
1547 | } | |
1548 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32); | |
1549 | ||
1550 | /* Enable the channel interrupt to propagate */ | |
1551 | usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index)); | |
1552 | usbc_haintmsk.s.haintmsk |= 1<<channel; | |
1553 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32); | |
1554 | } | |
1555 | ||
1556 | /* Setup the locations the DMA engines use */ | |
1557 | { | |
1558 | uint64_t dma_address = transaction->buffer + transaction->actual_bytes; | |
1559 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) | |
1560 | dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes; | |
1561 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address); | |
1562 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address); | |
1563 | } | |
1564 | ||
1565 | /* Setup both the size of the transfer and the SPLIT characteristics */ | |
1566 | { | |
1567 | union cvmx_usbcx_hcspltx usbc_hcsplt = {.u32 = 0}; | |
1568 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = 0}; | |
1569 | int packets_to_transfer; | |
1570 | int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes; | |
1571 | ||
1572 | /* | |
1573 | * ISOCHRONOUS transactions store each individual transfer size | |
1574 | * in the packet structure, not the global buffer_length | |
1575 | */ | |
1576 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) | |
1577 | bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes; | |
1578 | ||
1579 | /* | |
1580 | * We need to do split transactions when we are talking to non | |
1581 | * high speed devices that are behind a high speed hub | |
1582 | */ | |
1583 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1584 | /* | |
1585 | * On the start split phase (stage is even) record the | |
1586 | * frame number we will need to send the split complete. | |
1587 | * We only store the lower two bits since the time ahead | |
1588 | * can only be two frames | |
1589 | */ | |
1590 | if ((transaction->stage&1) == 0) { | |
1591 | if (transaction->type == CVMX_USB_TRANSFER_BULK) | |
1592 | pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f; | |
1593 | else | |
1594 | pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f; | |
1595 | } else | |
1596 | pipe->split_sc_frame = -1; | |
1597 | ||
1598 | usbc_hcsplt.s.spltena = 1; | |
1599 | usbc_hcsplt.s.hubaddr = pipe->hub_device_addr; | |
1600 | usbc_hcsplt.s.prtaddr = pipe->hub_port; | |
1601 | usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE); | |
1602 | ||
1603 | /* | |
1604 | * SPLIT transactions can only ever transmit one data | |
1605 | * packet so limit the transfer size to the max packet | |
1606 | * size | |
1607 | */ | |
1608 | if (bytes_to_transfer > pipe->max_packet) | |
1609 | bytes_to_transfer = pipe->max_packet; | |
1610 | ||
1611 | /* | |
1612 | * ISOCHRONOUS OUT splits are unique in that they limit | |
1613 | * data transfers to 188 byte chunks representing the | |
1614 | * begin/middle/end of the data or all | |
1615 | */ | |
1616 | if (!usbc_hcsplt.s.compsplt && | |
1617 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) && | |
1618 | (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) { | |
1619 | /* | |
1620 | * Clear the split complete frame number as | |
1621 | * there isn't going to be a split complete | |
1622 | */ | |
1623 | pipe->split_sc_frame = -1; | |
1624 | /* | |
1625 | * See if we've started this transfer and sent | |
1626 | * data | |
1627 | */ | |
1628 | if (transaction->actual_bytes == 0) { | |
1629 | /* | |
1630 | * Nothing sent yet, this is either a | |
1631 | * begin or the entire payload | |
1632 | */ | |
1633 | if (bytes_to_transfer <= 188) | |
1634 | /* Entire payload in one go */ | |
1635 | usbc_hcsplt.s.xactpos = 3; | |
1636 | else | |
1637 | /* First part of payload */ | |
1638 | usbc_hcsplt.s.xactpos = 2; | |
1639 | } else { | |
1640 | /* | |
1641 | * Continuing the previous data, we must | |
1642 | * either be in the middle or at the end | |
1643 | */ | |
1644 | if (bytes_to_transfer <= 188) | |
1645 | /* End of payload */ | |
1646 | usbc_hcsplt.s.xactpos = 1; | |
1647 | else | |
1648 | /* Middle of payload */ | |
1649 | usbc_hcsplt.s.xactpos = 0; | |
1650 | } | |
1651 | /* | |
1652 | * Again, the transfer size is limited to 188 | |
1653 | * bytes | |
1654 | */ | |
1655 | if (bytes_to_transfer > 188) | |
1656 | bytes_to_transfer = 188; | |
1657 | } | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * Make sure the transfer never exceeds the byte limit of the | |
1662 | * hardware. Further bytes will be sent as continued | |
1663 | * transactions | |
1664 | */ | |
1665 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { | |
1666 | /* | |
1667 | * Round MAX_TRANSFER_BYTES to a multiple of out packet | |
1668 | * size | |
1669 | */ | |
1670 | bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; | |
1671 | bytes_to_transfer *= pipe->max_packet; | |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * Calculate the number of packets to transfer. If the length is | |
1676 | * zero we still need to transfer one packet | |
1677 | */ | |
1678 | packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet; | |
1679 | if (packets_to_transfer == 0) | |
1680 | packets_to_transfer = 1; | |
1681 | else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { | |
1682 | /* | |
1683 | * Limit to one packet when not using DMA. Channels must | |
1684 | * be restarted between every packet for IN | |
1685 | * transactions, so there is no reason to do multiple | |
1686 | * packets in a row | |
1687 | */ | |
1688 | packets_to_transfer = 1; | |
1689 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1690 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { | |
1691 | /* | |
1692 | * Limit the number of packet and data transferred to | |
1693 | * what the hardware can handle | |
1694 | */ | |
1695 | packets_to_transfer = MAX_TRANSFER_PACKETS; | |
1696 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1697 | } | |
1698 | ||
1699 | usbc_hctsiz.s.xfersize = bytes_to_transfer; | |
1700 | usbc_hctsiz.s.pktcnt = packets_to_transfer; | |
1701 | ||
1702 | /* Update the DATA0/DATA1 toggle */ | |
1703 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1704 | /* | |
1705 | * High speed pipes may need a hardware ping before they start | |
1706 | */ | |
1707 | if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING) | |
1708 | usbc_hctsiz.s.dopng = 1; | |
1709 | ||
1710 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32); | |
1711 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32); | |
1712 | } | |
1713 | ||
1714 | /* Setup the Host Channel Characteristics Register */ | |
1715 | { | |
1716 | union cvmx_usbcx_hccharx usbc_hcchar = {.u32 = 0}; | |
1717 | ||
1718 | /* | |
1719 | * Set the startframe odd/even properly. This is only used for | |
1720 | * periodic | |
1721 | */ | |
1722 | usbc_hcchar.s.oddfrm = usb->frame_number&1; | |
1723 | ||
1724 | /* | |
1725 | * Set the number of back to back packets allowed by this | |
1726 | * endpoint. Split transactions interpret "ec" as the number of | |
1727 | * immediate retries of failure. These retries happen too | |
1728 | * quickly, so we disable these entirely for splits | |
1729 | */ | |
1730 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
1731 | usbc_hcchar.s.ec = 1; | |
1732 | else if (pipe->multi_count < 1) | |
1733 | usbc_hcchar.s.ec = 1; | |
1734 | else if (pipe->multi_count > 3) | |
1735 | usbc_hcchar.s.ec = 3; | |
1736 | else | |
1737 | usbc_hcchar.s.ec = pipe->multi_count; | |
1738 | ||
1739 | /* Set the rest of the endpoint specific settings */ | |
1740 | usbc_hcchar.s.devaddr = pipe->device_addr; | |
1741 | usbc_hcchar.s.eptype = transaction->type; | |
1742 | usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW); | |
1743 | usbc_hcchar.s.epdir = pipe->transfer_dir; | |
1744 | usbc_hcchar.s.epnum = pipe->endpoint_num; | |
1745 | usbc_hcchar.s.mps = pipe->max_packet; | |
1746 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); | |
1747 | } | |
1748 | ||
1749 | /* Do transaction type specific fixups as needed */ | |
1750 | switch (transaction->type) { | |
1751 | case CVMX_USB_TRANSFER_CONTROL: | |
1752 | __cvmx_usb_start_channel_control(usb, channel, pipe); | |
1753 | break; | |
1754 | case CVMX_USB_TRANSFER_BULK: | |
1755 | case CVMX_USB_TRANSFER_INTERRUPT: | |
1756 | break; | |
1757 | case CVMX_USB_TRANSFER_ISOCHRONOUS: | |
1758 | if (!__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1759 | /* | |
1760 | * ISO transactions require different PIDs depending on | |
1761 | * direction and how many packets are needed | |
1762 | */ | |
1763 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { | |
1764 | if (pipe->multi_count < 2) /* Need DATA0 */ | |
1765 | USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 0); | |
1766 | else /* Need MDATA */ | |
1767 | USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 3); | |
1768 | } | |
1769 | } | |
1770 | break; | |
1771 | } | |
1772 | { | |
1773 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))}; | |
1774 | transaction->xfersize = usbc_hctsiz.s.xfersize; | |
1775 | transaction->pktcnt = usbc_hctsiz.s.pktcnt; | |
1776 | } | |
1777 | /* Remeber when we start a split transaction */ | |
1778 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
1779 | usb->active_split = transaction; | |
1780 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, chena, 1); | |
1781 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
1782 | __cvmx_usb_fill_tx_fifo(usb, channel); | |
1783 | return; | |
1784 | } | |
1785 | ||
1786 | ||
1787 | /** | |
1788 | * Find a pipe that is ready to be scheduled to hardware. | |
cb61c600 | 1789 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1790 | * @list: Pipe list to search |
1791 | * @current_frame: | |
1792 | * Frame counter to use as a time reference. | |
1793 | * | |
1794 | * Returns: Pipe or NULL if none are ready | |
1795 | */ | |
4a23ee1b | 1796 | static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_state *usb, struct list_head *list, uint64_t current_frame) |
6570b4a9 | 1797 | { |
4a23ee1b AK |
1798 | struct cvmx_usb_pipe *pipe; |
1799 | ||
1800 | list_for_each_entry(pipe, list, node) { | |
5669601d AK |
1801 | struct cvmx_usb_transaction *t = |
1802 | list_first_entry(&pipe->transactions, typeof(*t), node); | |
1803 | if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && t && | |
6570b4a9 AK |
1804 | (pipe->next_tx_frame <= current_frame) && |
1805 | ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) && | |
5669601d | 1806 | (!usb->active_split || (usb->active_split == t))) { |
6570b4a9 | 1807 | CVMX_PREFETCH(pipe, 128); |
5669601d | 1808 | CVMX_PREFETCH(t, 0); |
6570b4a9 AK |
1809 | return pipe; |
1810 | } | |
6570b4a9 AK |
1811 | } |
1812 | return NULL; | |
1813 | } | |
1814 | ||
1815 | ||
1816 | /** | |
1817 | * Called whenever a pipe might need to be scheduled to the | |
1818 | * hardware. | |
1819 | * | |
cb61c600 | 1820 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1821 | * @is_sof: True if this schedule was called on a SOF interrupt. |
1822 | */ | |
cb61c600 | 1823 | static void __cvmx_usb_schedule(struct cvmx_usb_state *usb, int is_sof) |
6570b4a9 AK |
1824 | { |
1825 | int channel; | |
1826 | struct cvmx_usb_pipe *pipe; | |
1827 | int need_sof; | |
1828 | enum cvmx_usb_transfer ttype; | |
1829 | ||
1830 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { | |
1831 | /* | |
1832 | * Without DMA we need to be careful to not schedule something | |
1833 | * at the end of a frame and cause an overrun. | |
1834 | */ | |
1835 | union cvmx_usbcx_hfnum hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))}; | |
1836 | union cvmx_usbcx_hfir hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))}; | |
1837 | if (hfnum.s.frrem < hfir.s.frint/4) | |
1838 | goto done; | |
1839 | } | |
1840 | ||
1841 | while (usb->idle_hardware_channels) { | |
1842 | /* Find an idle channel */ | |
1843 | channel = __fls(usb->idle_hardware_channels); | |
1844 | if (unlikely(channel > 7)) | |
1845 | break; | |
1846 | ||
1847 | /* Find a pipe needing service */ | |
1848 | pipe = NULL; | |
1849 | if (is_sof) { | |
1850 | /* | |
1851 | * Only process periodic pipes on SOF interrupts. This | |
1852 | * way we are sure that the periodic data is sent in the | |
1853 | * beginning of the frame | |
1854 | */ | |
1855 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number); | |
1856 | if (likely(!pipe)) | |
1857 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number); | |
1858 | } | |
1859 | if (likely(!pipe)) { | |
1860 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number); | |
1861 | if (likely(!pipe)) | |
1862 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number); | |
1863 | } | |
1864 | if (!pipe) | |
1865 | break; | |
1866 | ||
1867 | __cvmx_usb_start_channel(usb, channel, pipe); | |
1868 | } | |
1869 | ||
1870 | done: | |
1871 | /* | |
1872 | * Only enable SOF interrupts when we have transactions pending in the | |
1873 | * future that might need to be scheduled | |
1874 | */ | |
1875 | need_sof = 0; | |
1876 | for (ttype = CVMX_USB_TRANSFER_CONTROL; ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) { | |
4a23ee1b | 1877 | list_for_each_entry(pipe, &usb->active_pipes[ttype], node) { |
6570b4a9 AK |
1878 | if (pipe->next_tx_frame > usb->frame_number) { |
1879 | need_sof = 1; | |
1880 | break; | |
1881 | } | |
6570b4a9 AK |
1882 | } |
1883 | } | |
1884 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, sofmsk, need_sof); | |
1885 | return; | |
1886 | } | |
1887 | ||
75ee5124 AK |
1888 | static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p) |
1889 | { | |
1890 | return container_of(p, struct octeon_hcd, usb); | |
1891 | } | |
6570b4a9 | 1892 | |
75ee5124 | 1893 | static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p) |
6570b4a9 | 1894 | { |
75ee5124 AK |
1895 | return container_of((void *)p, struct usb_hcd, hcd_priv); |
1896 | } | |
1897 | ||
1898 | static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb, | |
1899 | enum cvmx_usb_complete status, | |
60f81507 | 1900 | struct cvmx_usb_pipe *pipe, |
3e1674c0 AK |
1901 | struct cvmx_usb_transaction |
1902 | *transaction, | |
75ee5124 | 1903 | int bytes_transferred, |
0cce1004 | 1904 | struct urb *urb) |
75ee5124 AK |
1905 | { |
1906 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); | |
1907 | struct usb_hcd *hcd = octeon_to_hcd(priv); | |
1908 | struct device *dev = hcd->self.controller; | |
75ee5124 AK |
1909 | |
1910 | urb->actual_length = bytes_transferred; | |
1911 | urb->hcpriv = NULL; | |
1912 | ||
244544a1 | 1913 | if (!list_empty(&urb->urb_list)) |
75ee5124 AK |
1914 | /* |
1915 | * It is on the dequeue_list, but we are going to call | |
1916 | * usb_hcd_giveback_urb(), so we must clear it from | |
1917 | * the list. We got to it before the | |
1918 | * octeon_usb_urb_dequeue_work() tasklet did. | |
1919 | */ | |
244544a1 | 1920 | list_del_init(&urb->urb_list); |
6570b4a9 | 1921 | |
75ee5124 AK |
1922 | /* For Isochronous transactions we need to update the URB packet status |
1923 | list from data in our private copy */ | |
1924 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1925 | int i; | |
1926 | /* | |
1927 | * The pointer to the private list is stored in the setup_packet | |
1928 | * field. | |
1929 | */ | |
1930 | struct cvmx_usb_iso_packet *iso_packet = | |
1931 | (struct cvmx_usb_iso_packet *) urb->setup_packet; | |
1932 | /* Recalculate the transfer size by adding up each packet */ | |
1933 | urb->actual_length = 0; | |
1934 | for (i = 0; i < urb->number_of_packets; i++) { | |
1935 | if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) { | |
1936 | urb->iso_frame_desc[i].status = 0; | |
1937 | urb->iso_frame_desc[i].actual_length = iso_packet[i].length; | |
1938 | urb->actual_length += urb->iso_frame_desc[i].actual_length; | |
1939 | } else { | |
3e1674c0 | 1940 | dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%p transaction=%p size=%d\n", |
75ee5124 | 1941 | i, urb->number_of_packets, |
60f81507 | 1942 | iso_packet[i].status, pipe, |
3e1674c0 | 1943 | transaction, iso_packet[i].length); |
75ee5124 AK |
1944 | urb->iso_frame_desc[i].status = -EREMOTEIO; |
1945 | } | |
1946 | } | |
1947 | /* Free the private list now that we don't need it anymore */ | |
1948 | kfree(iso_packet); | |
1949 | urb->setup_packet = NULL; | |
1950 | } | |
6570b4a9 | 1951 | |
75ee5124 AK |
1952 | switch (status) { |
1953 | case CVMX_USB_COMPLETE_SUCCESS: | |
1954 | urb->status = 0; | |
1955 | break; | |
1956 | case CVMX_USB_COMPLETE_CANCEL: | |
1957 | if (urb->status == 0) | |
1958 | urb->status = -ENOENT; | |
1959 | break; | |
1960 | case CVMX_USB_COMPLETE_STALL: | |
3e1674c0 AK |
1961 | dev_dbg(dev, "status=stall pipe=%p transaction=%p size=%d\n", |
1962 | pipe, transaction, bytes_transferred); | |
75ee5124 AK |
1963 | urb->status = -EPIPE; |
1964 | break; | |
1965 | case CVMX_USB_COMPLETE_BABBLEERR: | |
3e1674c0 AK |
1966 | dev_dbg(dev, "status=babble pipe=%p transaction=%p size=%d\n", |
1967 | pipe, transaction, bytes_transferred); | |
75ee5124 AK |
1968 | urb->status = -EPIPE; |
1969 | break; | |
1970 | case CVMX_USB_COMPLETE_SHORT: | |
3e1674c0 AK |
1971 | dev_dbg(dev, "status=short pipe=%p transaction=%p size=%d\n", |
1972 | pipe, transaction, bytes_transferred); | |
75ee5124 AK |
1973 | urb->status = -EREMOTEIO; |
1974 | break; | |
1975 | case CVMX_USB_COMPLETE_ERROR: | |
1976 | case CVMX_USB_COMPLETE_XACTERR: | |
1977 | case CVMX_USB_COMPLETE_DATATGLERR: | |
1978 | case CVMX_USB_COMPLETE_FRAMEERR: | |
3e1674c0 AK |
1979 | dev_dbg(dev, "status=%d pipe=%p transaction=%p size=%d\n", |
1980 | status, pipe, transaction, bytes_transferred); | |
75ee5124 AK |
1981 | urb->status = -EPROTO; |
1982 | break; | |
1983 | } | |
1984 | spin_unlock(&priv->lock); | |
1985 | usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status); | |
1986 | spin_lock(&priv->lock); | |
6570b4a9 AK |
1987 | } |
1988 | ||
6570b4a9 AK |
1989 | /** |
1990 | * Signal the completion of a transaction and free it. The | |
1991 | * transaction will be removed from the pipe transaction list. | |
1992 | * | |
cb61c600 | 1993 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1994 | * @pipe: Pipe the transaction is on |
1995 | * @transaction: | |
1996 | * Transaction that completed | |
1997 | * @complete_code: | |
1998 | * Completion code | |
1999 | */ | |
cb61c600 | 2000 | static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb, |
6570b4a9 AK |
2001 | struct cvmx_usb_pipe *pipe, |
2002 | struct cvmx_usb_transaction *transaction, | |
2003 | enum cvmx_usb_complete complete_code) | |
2004 | { | |
2005 | /* If this was a split then clear our split in progress marker */ | |
2006 | if (usb->active_split == transaction) | |
2007 | usb->active_split = NULL; | |
2008 | ||
2009 | /* | |
2010 | * Isochronous transactions need extra processing as they might not be | |
2011 | * done after a single data transfer | |
2012 | */ | |
2013 | if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) { | |
2014 | /* Update the number of bytes transferred in this ISO packet */ | |
2015 | transaction->iso_packets[0].length = transaction->actual_bytes; | |
2016 | transaction->iso_packets[0].status = complete_code; | |
2017 | ||
2018 | /* | |
2019 | * If there are more ISOs pending and we succeeded, schedule the | |
2020 | * next one | |
2021 | */ | |
2022 | if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) { | |
2023 | /* No bytes transferred for this packet as of yet */ | |
2024 | transaction->actual_bytes = 0; | |
2025 | /* One less ISO waiting to transfer */ | |
2026 | transaction->iso_number_packets--; | |
2027 | /* Increment to the next location in our packet array */ | |
2028 | transaction->iso_packets++; | |
2029 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; | |
2030 | goto done; | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | /* Remove the transaction from the pipe list */ | |
5669601d AK |
2035 | list_del(&transaction->node); |
2036 | if (list_empty(&pipe->transactions)) | |
4a23ee1b | 2037 | list_move_tail(&pipe->node, &usb->idle_pipes); |
60f81507 | 2038 | octeon_usb_urb_complete_callback(usb, complete_code, pipe, |
3e1674c0 | 2039 | transaction, |
75ee5124 | 2040 | transaction->actual_bytes, |
0cce1004 | 2041 | transaction->urb); |
a2dfef06 | 2042 | kfree(transaction); |
6570b4a9 AK |
2043 | done: |
2044 | return; | |
2045 | } | |
2046 | ||
2047 | ||
2048 | /** | |
2049 | * Submit a usb transaction to a pipe. Called for all types | |
2050 | * of transactions. | |
2051 | * | |
2052 | * @usb: | |
60f81507 | 2053 | * @pipe: Which pipe to submit to. |
6570b4a9 AK |
2054 | * @type: Transaction type |
2055 | * @buffer: User buffer for the transaction | |
2056 | * @buffer_length: | |
2057 | * User buffer's length in bytes | |
2058 | * @control_header: | |
2059 | * For control transactions, the 8 byte standard header | |
2060 | * @iso_start_frame: | |
2061 | * For ISO transactions, the start frame | |
2062 | * @iso_number_packets: | |
2063 | * For ISO, the number of packet in the transaction. | |
2064 | * @iso_packets: | |
2065 | * A description of each ISO packet | |
0cce1004 | 2066 | * @urb: URB for the callback |
6570b4a9 | 2067 | * |
3e1674c0 | 2068 | * Returns: Transaction or NULL on failure. |
6570b4a9 | 2069 | */ |
3e1674c0 AK |
2070 | static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction(struct cvmx_usb_state *usb, |
2071 | struct cvmx_usb_pipe *pipe, | |
2072 | enum cvmx_usb_transfer type, | |
2073 | uint64_t buffer, | |
2074 | int buffer_length, | |
2075 | uint64_t control_header, | |
2076 | int iso_start_frame, | |
2077 | int iso_number_packets, | |
2078 | struct cvmx_usb_iso_packet *iso_packets, | |
2079 | struct urb *urb) | |
6570b4a9 | 2080 | { |
6570b4a9 | 2081 | struct cvmx_usb_transaction *transaction; |
6570b4a9 | 2082 | |
6570b4a9 | 2083 | if (unlikely(pipe->transfer_type != type)) |
3e1674c0 | 2084 | return NULL; |
6570b4a9 | 2085 | |
a2dfef06 | 2086 | transaction = kzalloc(sizeof(*transaction), GFP_ATOMIC); |
6570b4a9 | 2087 | if (unlikely(!transaction)) |
3e1674c0 | 2088 | return NULL; |
6570b4a9 AK |
2089 | |
2090 | transaction->type = type; | |
2091 | transaction->buffer = buffer; | |
2092 | transaction->buffer_length = buffer_length; | |
2093 | transaction->control_header = control_header; | |
2094 | /* FIXME: This is not used, implement it. */ | |
2095 | transaction->iso_start_frame = iso_start_frame; | |
2096 | transaction->iso_number_packets = iso_number_packets; | |
2097 | transaction->iso_packets = iso_packets; | |
0cce1004 | 2098 | transaction->urb = urb; |
6570b4a9 AK |
2099 | if (transaction->type == CVMX_USB_TRANSFER_CONTROL) |
2100 | transaction->stage = CVMX_USB_STAGE_SETUP; | |
2101 | else | |
2102 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; | |
2103 | ||
5669601d AK |
2104 | if (!list_empty(&pipe->transactions)) { |
2105 | list_add_tail(&transaction->node, &pipe->transactions); | |
6570b4a9 | 2106 | } else { |
5669601d | 2107 | list_add_tail(&transaction->node, &pipe->transactions); |
4a23ee1b AK |
2108 | list_move_tail(&pipe->node, |
2109 | &usb->active_pipes[pipe->transfer_type]); | |
6570b4a9 | 2110 | |
5669601d AK |
2111 | /* |
2112 | * We may need to schedule the pipe if this was the head of the | |
2113 | * pipe. | |
2114 | */ | |
6570b4a9 | 2115 | __cvmx_usb_schedule(usb, 0); |
5669601d | 2116 | } |
6570b4a9 | 2117 | |
3e1674c0 | 2118 | return transaction; |
6570b4a9 AK |
2119 | } |
2120 | ||
2121 | ||
2122 | /** | |
2123 | * Call to submit a USB Bulk transfer to a pipe. | |
2124 | * | |
cb61c600 | 2125 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2126 | * @pipe: Handle to the pipe for the transfer. |
9ccca707 | 2127 | * @urb: URB. |
6570b4a9 | 2128 | * |
3e1674c0 | 2129 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2130 | */ |
3e1674c0 AK |
2131 | static struct cvmx_usb_transaction *cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, |
2132 | struct cvmx_usb_pipe *pipe, | |
2133 | struct urb *urb) | |
6570b4a9 | 2134 | { |
3e1674c0 AK |
2135 | return __cvmx_usb_submit_transaction(usb, pipe, CVMX_USB_TRANSFER_BULK, |
2136 | urb->transfer_dma, | |
2137 | urb->transfer_buffer_length, | |
2138 | 0, /* control_header */ | |
2139 | 0, /* iso_start_frame */ | |
2140 | 0, /* iso_number_packets */ | |
2141 | NULL, /* iso_packets */ | |
2142 | urb); | |
6570b4a9 AK |
2143 | } |
2144 | ||
2145 | ||
2146 | /** | |
2147 | * Call to submit a USB Interrupt transfer to a pipe. | |
2148 | * | |
cb61c600 | 2149 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2150 | * @pipe: Handle to the pipe for the transfer. |
0cce1004 | 2151 | * @urb: URB returned when the callback is called. |
6570b4a9 | 2152 | * |
3e1674c0 | 2153 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2154 | */ |
3e1674c0 AK |
2155 | static struct cvmx_usb_transaction *cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb, |
2156 | struct cvmx_usb_pipe *pipe, | |
2157 | struct urb *urb) | |
6570b4a9 | 2158 | { |
3e1674c0 AK |
2159 | return __cvmx_usb_submit_transaction(usb, pipe, |
2160 | CVMX_USB_TRANSFER_INTERRUPT, | |
2161 | urb->transfer_dma, | |
2162 | urb->transfer_buffer_length, | |
2163 | 0, /* control_header */ | |
2164 | 0, /* iso_start_frame */ | |
2165 | 0, /* iso_number_packets */ | |
2166 | NULL, /* iso_packets */ | |
2167 | urb); | |
6570b4a9 AK |
2168 | } |
2169 | ||
2170 | ||
2171 | /** | |
2172 | * Call to submit a USB Control transfer to a pipe. | |
2173 | * | |
cb61c600 | 2174 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2175 | * @pipe: Handle to the pipe for the transfer. |
2ae09e87 | 2176 | * @urb: URB. |
6570b4a9 | 2177 | * |
3e1674c0 | 2178 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2179 | */ |
3e1674c0 AK |
2180 | static struct cvmx_usb_transaction *cvmx_usb_submit_control(struct cvmx_usb_state *usb, |
2181 | struct cvmx_usb_pipe *pipe, | |
2182 | struct urb *urb) | |
6570b4a9 | 2183 | { |
2ae09e87 AK |
2184 | int buffer_length = urb->transfer_buffer_length; |
2185 | uint64_t control_header = urb->setup_dma; | |
6570b4a9 AK |
2186 | union cvmx_usb_control_header *header = |
2187 | cvmx_phys_to_ptr(control_header); | |
2188 | ||
6570b4a9 AK |
2189 | if ((header->s.request_type & 0x80) == 0) |
2190 | buffer_length = le16_to_cpu(header->s.length); | |
2191 | ||
3e1674c0 AK |
2192 | return __cvmx_usb_submit_transaction(usb, pipe, |
2193 | CVMX_USB_TRANSFER_CONTROL, | |
2194 | urb->transfer_dma, buffer_length, | |
2195 | control_header, | |
2196 | 0, /* iso_start_frame */ | |
2197 | 0, /* iso_number_packets */ | |
2198 | NULL, /* iso_packets */ | |
2199 | urb); | |
6570b4a9 AK |
2200 | } |
2201 | ||
2202 | ||
2203 | /** | |
2204 | * Call to submit a USB Isochronous transfer to a pipe. | |
2205 | * | |
cb61c600 | 2206 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2207 | * @pipe: Handle to the pipe for the transfer. |
0cce1004 | 2208 | * @urb: URB returned when the callback is called. |
6570b4a9 | 2209 | * |
3e1674c0 | 2210 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2211 | */ |
3e1674c0 AK |
2212 | static struct cvmx_usb_transaction *cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb, |
2213 | struct cvmx_usb_pipe *pipe, | |
2214 | struct urb *urb) | |
6570b4a9 | 2215 | { |
e16b5e3f | 2216 | struct cvmx_usb_iso_packet *packets; |
6570b4a9 | 2217 | |
e16b5e3f | 2218 | packets = (struct cvmx_usb_iso_packet *) urb->setup_packet; |
3e1674c0 AK |
2219 | return __cvmx_usb_submit_transaction(usb, pipe, |
2220 | CVMX_USB_TRANSFER_ISOCHRONOUS, | |
2221 | urb->transfer_dma, | |
2222 | urb->transfer_buffer_length, | |
2223 | 0, /* control_header */ | |
2224 | urb->start_frame, | |
2225 | urb->number_of_packets, | |
2226 | packets, urb); | |
6570b4a9 AK |
2227 | } |
2228 | ||
2229 | ||
2230 | /** | |
2231 | * Cancel one outstanding request in a pipe. Canceling a request | |
2232 | * can fail if the transaction has already completed before cancel | |
2233 | * is called. Even after a successful cancel call, it may take | |
2234 | * a frame or two for the cvmx_usb_poll() function to call the | |
2235 | * associated callback. | |
2236 | * | |
cb61c600 | 2237 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2238 | * @pipe: Pipe to cancel requests in. |
3e1674c0 | 2239 | * @transaction: Transaction to cancel, returned by the submit function. |
6570b4a9 AK |
2240 | * |
2241 | * Returns: 0 or a negative error code. | |
2242 | */ | |
60f81507 AK |
2243 | static int cvmx_usb_cancel(struct cvmx_usb_state *usb, |
2244 | struct cvmx_usb_pipe *pipe, | |
3e1674c0 | 2245 | struct cvmx_usb_transaction *transaction) |
6570b4a9 | 2246 | { |
6570b4a9 AK |
2247 | /* |
2248 | * If the transaction is the HEAD of the queue and scheduled. We need to | |
2249 | * treat it special | |
2250 | */ | |
5669601d AK |
2251 | if (list_first_entry(&pipe->transactions, typeof(*transaction), node) == |
2252 | transaction && (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) { | |
6570b4a9 AK |
2253 | union cvmx_usbcx_hccharx usbc_hcchar; |
2254 | ||
2255 | usb->pipe_for_channel[pipe->channel] = NULL; | |
2256 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; | |
2257 | ||
2258 | CVMX_SYNCW; | |
2259 | ||
2260 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index)); | |
2261 | /* | |
2262 | * If the channel isn't enabled then the transaction already | |
2263 | * completed. | |
2264 | */ | |
2265 | if (usbc_hcchar.s.chena) { | |
2266 | usbc_hcchar.s.chdis = 1; | |
2267 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32); | |
2268 | } | |
2269 | } | |
2270 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL); | |
2271 | return 0; | |
2272 | } | |
2273 | ||
2274 | ||
2275 | /** | |
2276 | * Cancel all outstanding requests in a pipe. Logically all this | |
2277 | * does is call cvmx_usb_cancel() in a loop. | |
2278 | * | |
cb61c600 | 2279 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2280 | * @pipe: Pipe to cancel requests in. |
6570b4a9 AK |
2281 | * |
2282 | * Returns: 0 or a negative error code. | |
2283 | */ | |
60f81507 AK |
2284 | static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb, |
2285 | struct cvmx_usb_pipe *pipe) | |
6570b4a9 | 2286 | { |
5669601d AK |
2287 | struct cvmx_usb_transaction *transaction, *next; |
2288 | ||
6570b4a9 | 2289 | /* Simply loop through and attempt to cancel each transaction */ |
5669601d AK |
2290 | list_for_each_entry_safe(transaction, next, &pipe->transactions, node) { |
2291 | int result = cvmx_usb_cancel(usb, pipe, transaction); | |
6570b4a9 AK |
2292 | if (unlikely(result != 0)) |
2293 | return result; | |
2294 | } | |
2295 | return 0; | |
2296 | } | |
2297 | ||
2298 | ||
2299 | /** | |
2300 | * Close a pipe created with cvmx_usb_open_pipe(). | |
2301 | * | |
cb61c600 | 2302 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2303 | * @pipe: Pipe to close. |
6570b4a9 AK |
2304 | * |
2305 | * Returns: 0 or a negative error code. EBUSY is returned if the pipe has | |
2306 | * outstanding transfers. | |
2307 | */ | |
60f81507 AK |
2308 | static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb, |
2309 | struct cvmx_usb_pipe *pipe) | |
6570b4a9 | 2310 | { |
6570b4a9 | 2311 | /* Fail if the pipe has pending transactions */ |
5669601d | 2312 | if (!list_empty(&pipe->transactions)) |
6570b4a9 AK |
2313 | return -EBUSY; |
2314 | ||
4a23ee1b | 2315 | list_del(&pipe->node); |
d2695a8a | 2316 | kfree(pipe); |
6570b4a9 AK |
2317 | |
2318 | return 0; | |
2319 | } | |
2320 | ||
6570b4a9 AK |
2321 | /** |
2322 | * Get the current USB protocol level frame number. The frame | |
2323 | * number is always in the range of 0-0x7ff. | |
2324 | * | |
cb61c600 | 2325 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
2326 | * |
2327 | * Returns: USB frame number | |
2328 | */ | |
cb61c600 | 2329 | static int cvmx_usb_get_frame_number(struct cvmx_usb_state *usb) |
6570b4a9 AK |
2330 | { |
2331 | int frame_number; | |
6570b4a9 AK |
2332 | union cvmx_usbcx_hfnum usbc_hfnum; |
2333 | ||
2334 | usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); | |
2335 | frame_number = usbc_hfnum.s.frnum; | |
2336 | ||
2337 | return frame_number; | |
2338 | } | |
2339 | ||
2340 | ||
2341 | /** | |
2342 | * Poll a channel for status | |
2343 | * | |
2344 | * @usb: USB device | |
2345 | * @channel: Channel to poll | |
2346 | * | |
2347 | * Returns: Zero on success | |
2348 | */ | |
cb61c600 | 2349 | static int __cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel) |
6570b4a9 AK |
2350 | { |
2351 | union cvmx_usbcx_hcintx usbc_hcint; | |
2352 | union cvmx_usbcx_hctsizx usbc_hctsiz; | |
2353 | union cvmx_usbcx_hccharx usbc_hcchar; | |
2354 | struct cvmx_usb_pipe *pipe; | |
2355 | struct cvmx_usb_transaction *transaction; | |
2356 | int bytes_this_transfer; | |
2357 | int bytes_in_last_packet; | |
2358 | int packets_processed; | |
2359 | int buffer_space_left; | |
2360 | ||
2361 | /* Read the interrupt status bits for the channel */ | |
2362 | usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index)); | |
2363 | ||
2364 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { | |
2365 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); | |
2366 | ||
2367 | if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) { | |
2368 | /* | |
2369 | * There seems to be a bug in CN31XX which can cause | |
2370 | * interrupt IN transfers to get stuck until we do a | |
2371 | * write of HCCHARX without changing things | |
2372 | */ | |
2373 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); | |
2374 | return 0; | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * In non DMA mode the channels don't halt themselves. We need | |
2379 | * to manually disable channels that are left running | |
2380 | */ | |
2381 | if (!usbc_hcint.s.chhltd) { | |
2382 | if (usbc_hcchar.s.chena) { | |
2383 | union cvmx_usbcx_hcintmskx hcintmsk; | |
2384 | /* Disable all interrupts except CHHLTD */ | |
2385 | hcintmsk.u32 = 0; | |
2386 | hcintmsk.s.chhltdmsk = 1; | |
2387 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32); | |
2388 | usbc_hcchar.s.chdis = 1; | |
2389 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); | |
2390 | return 0; | |
2391 | } else if (usbc_hcint.s.xfercompl) { | |
2392 | /* | |
2393 | * Successful IN/OUT with transfer complete. | |
2394 | * Channel halt isn't needed. | |
2395 | */ | |
2396 | } else { | |
2397 | cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel); | |
2398 | return 0; | |
2399 | } | |
2400 | } | |
2401 | } else { | |
2402 | /* | |
2403 | * There is are no interrupts that we need to process when the | |
2404 | * channel is still running | |
2405 | */ | |
2406 | if (!usbc_hcint.s.chhltd) | |
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | /* Disable the channel interrupts now that it is done */ | |
2411 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); | |
2412 | usb->idle_hardware_channels |= (1<<channel); | |
2413 | ||
2414 | /* Make sure this channel is tied to a valid pipe */ | |
2415 | pipe = usb->pipe_for_channel[channel]; | |
2416 | CVMX_PREFETCH(pipe, 0); | |
2417 | CVMX_PREFETCH(pipe, 128); | |
2418 | if (!pipe) | |
2419 | return 0; | |
5669601d AK |
2420 | transaction = list_first_entry(&pipe->transactions, typeof(*transaction), |
2421 | node); | |
6570b4a9 AK |
2422 | CVMX_PREFETCH(transaction, 0); |
2423 | ||
2424 | /* | |
2425 | * Disconnect this pipe from the HW channel. Later the schedule | |
2426 | * function will figure out which pipe needs to go | |
2427 | */ | |
2428 | usb->pipe_for_channel[channel] = NULL; | |
2429 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; | |
2430 | ||
2431 | /* | |
2432 | * Read the channel config info so we can figure out how much data | |
2433 | * transfered | |
2434 | */ | |
2435 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); | |
2436 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); | |
2437 | ||
2438 | /* | |
2439 | * Calculating the number of bytes successfully transferred is dependent | |
2440 | * on the transfer direction | |
2441 | */ | |
2442 | packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt; | |
2443 | if (usbc_hcchar.s.epdir) { | |
2444 | /* | |
2445 | * IN transactions are easy. For every byte received the | |
2446 | * hardware decrements xfersize. All we need to do is subtract | |
2447 | * the current value of xfersize from its starting value and we | |
2448 | * know how many bytes were written to the buffer | |
2449 | */ | |
2450 | bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize; | |
2451 | } else { | |
2452 | /* | |
2453 | * OUT transaction don't decrement xfersize. Instead pktcnt is | |
2454 | * decremented on every successful packet send. The hardware | |
2455 | * does this when it receives an ACK, or NYET. If it doesn't | |
2456 | * receive one of these responses pktcnt doesn't change | |
2457 | */ | |
2458 | bytes_this_transfer = packets_processed * usbc_hcchar.s.mps; | |
2459 | /* | |
2460 | * The last packet may not be a full transfer if we didn't have | |
2461 | * enough data | |
2462 | */ | |
2463 | if (bytes_this_transfer > transaction->xfersize) | |
2464 | bytes_this_transfer = transaction->xfersize; | |
2465 | } | |
2466 | /* Figure out how many bytes were in the last packet of the transfer */ | |
2467 | if (packets_processed) | |
2468 | bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps; | |
2469 | else | |
2470 | bytes_in_last_packet = bytes_this_transfer; | |
2471 | ||
2472 | /* | |
2473 | * As a special case, setup transactions output the setup header, not | |
2474 | * the user's data. For this reason we don't count setup data as bytes | |
2475 | * transferred | |
2476 | */ | |
2477 | if ((transaction->stage == CVMX_USB_STAGE_SETUP) || | |
2478 | (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE)) | |
2479 | bytes_this_transfer = 0; | |
2480 | ||
2481 | /* | |
2482 | * Add the bytes transferred to the running total. It is important that | |
2483 | * bytes_this_transfer doesn't count any data that needs to be | |
2484 | * retransmitted | |
2485 | */ | |
2486 | transaction->actual_bytes += bytes_this_transfer; | |
2487 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) | |
2488 | buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes; | |
2489 | else | |
2490 | buffer_space_left = transaction->buffer_length - transaction->actual_bytes; | |
2491 | ||
2492 | /* | |
2493 | * We need to remember the PID toggle state for the next transaction. | |
2494 | * The hardware already updated it for the next transaction | |
2495 | */ | |
2496 | pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0); | |
2497 | ||
2498 | /* | |
2499 | * For high speed bulk out, assume the next transaction will need to do | |
2500 | * a ping before proceeding. If this isn't true the ACK processing below | |
2501 | * will clear this flag | |
2502 | */ | |
2503 | if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && | |
2504 | (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && | |
2505 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)) | |
2506 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; | |
2507 | ||
2508 | if (usbc_hcint.s.stall) { | |
2509 | /* | |
2510 | * STALL as a response means this transaction cannot be | |
2511 | * completed because the device can't process transactions. Tell | |
2512 | * the user. Any data that was transferred will be counted on | |
2513 | * the actual bytes transferred | |
2514 | */ | |
2515 | pipe->pid_toggle = 0; | |
2516 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL); | |
2517 | } else if (usbc_hcint.s.xacterr) { | |
2518 | /* | |
2519 | * We know at least one packet worked if we get a ACK or NAK. | |
2520 | * Reset the retry counter | |
2521 | */ | |
2522 | if (usbc_hcint.s.nak || usbc_hcint.s.ack) | |
2523 | transaction->retries = 0; | |
2524 | transaction->retries++; | |
2525 | if (transaction->retries > MAX_RETRIES) { | |
2526 | /* | |
2527 | * XactErr as a response means the device signaled | |
2528 | * something wrong with the transfer. For example, PID | |
2529 | * toggle errors cause these | |
2530 | */ | |
2531 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR); | |
2532 | } else { | |
2533 | /* | |
2534 | * If this was a split then clear our split in progress | |
2535 | * marker | |
2536 | */ | |
2537 | if (usb->active_split == transaction) | |
2538 | usb->active_split = NULL; | |
2539 | /* | |
2540 | * Rewind to the beginning of the transaction by anding | |
2541 | * off the split complete bit | |
2542 | */ | |
2543 | transaction->stage &= ~1; | |
2544 | pipe->split_sc_frame = -1; | |
2545 | pipe->next_tx_frame += pipe->interval; | |
2546 | if (pipe->next_tx_frame < usb->frame_number) | |
2547 | pipe->next_tx_frame = usb->frame_number + pipe->interval - | |
2548 | (usb->frame_number - pipe->next_tx_frame) % pipe->interval; | |
2549 | } | |
2550 | } else if (usbc_hcint.s.bblerr) { | |
2551 | /* Babble Error (BblErr) */ | |
2552 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR); | |
2553 | } else if (usbc_hcint.s.datatglerr) { | |
2554 | /* We'll retry the exact same transaction again */ | |
2555 | transaction->retries++; | |
2556 | } else if (usbc_hcint.s.nyet) { | |
2557 | /* | |
2558 | * NYET as a response is only allowed in three cases: as a | |
2559 | * response to a ping, as a response to a split transaction, and | |
2560 | * as a response to a bulk out. The ping case is handled by | |
2561 | * hardware, so we only have splits and bulk out | |
2562 | */ | |
2563 | if (!__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2564 | transaction->retries = 0; | |
2565 | /* | |
2566 | * If there is more data to go then we need to try | |
2567 | * again. Otherwise this transaction is complete | |
2568 | */ | |
2569 | if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) | |
2570 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2571 | } else { | |
2572 | /* | |
2573 | * Split transactions retry the split complete 4 times | |
2574 | * then rewind to the start split and do the entire | |
2575 | * transactions again | |
2576 | */ | |
2577 | transaction->retries++; | |
2578 | if ((transaction->retries & 0x3) == 0) { | |
2579 | /* | |
2580 | * Rewind to the beginning of the transaction by | |
2581 | * anding off the split complete bit | |
2582 | */ | |
2583 | transaction->stage &= ~1; | |
2584 | pipe->split_sc_frame = -1; | |
2585 | } | |
2586 | } | |
2587 | } else if (usbc_hcint.s.ack) { | |
2588 | transaction->retries = 0; | |
2589 | /* | |
2590 | * The ACK bit can only be checked after the other error bits. | |
2591 | * This is because a multi packet transfer may succeed in a | |
2592 | * number of packets and then get a different response on the | |
2593 | * last packet. In this case both ACK and the last response bit | |
2594 | * will be set. If none of the other response bits is set, then | |
2595 | * the last packet must have been an ACK | |
2596 | * | |
2597 | * Since we got an ACK, we know we don't need to do a ping on | |
2598 | * this pipe | |
2599 | */ | |
2600 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING; | |
2601 | ||
2602 | switch (transaction->type) { | |
2603 | case CVMX_USB_TRANSFER_CONTROL: | |
2604 | switch (transaction->stage) { | |
2605 | case CVMX_USB_STAGE_NON_CONTROL: | |
2606 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: | |
2607 | /* This should be impossible */ | |
2608 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR); | |
2609 | break; | |
2610 | case CVMX_USB_STAGE_SETUP: | |
2611 | pipe->pid_toggle = 1; | |
2612 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
2613 | transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE; | |
2614 | else { | |
2615 | union cvmx_usb_control_header *header = | |
2616 | cvmx_phys_to_ptr(transaction->control_header); | |
2617 | if (header->s.length) | |
2618 | transaction->stage = CVMX_USB_STAGE_DATA; | |
2619 | else | |
2620 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2621 | } | |
2622 | break; | |
2623 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: | |
2624 | { | |
2625 | union cvmx_usb_control_header *header = | |
2626 | cvmx_phys_to_ptr(transaction->control_header); | |
2627 | if (header->s.length) | |
2628 | transaction->stage = CVMX_USB_STAGE_DATA; | |
2629 | else | |
2630 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2631 | } | |
2632 | break; | |
2633 | case CVMX_USB_STAGE_DATA: | |
2634 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2635 | transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE; | |
2636 | /* | |
2637 | * For setup OUT data that are splits, | |
2638 | * the hardware doesn't appear to count | |
2639 | * transferred data. Here we manually | |
2640 | * update the data transferred | |
2641 | */ | |
2642 | if (!usbc_hcchar.s.epdir) { | |
2643 | if (buffer_space_left < pipe->max_packet) | |
2644 | transaction->actual_bytes += buffer_space_left; | |
2645 | else | |
2646 | transaction->actual_bytes += pipe->max_packet; | |
2647 | } | |
2648 | } else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) { | |
2649 | pipe->pid_toggle = 1; | |
2650 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2651 | } | |
2652 | break; | |
2653 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: | |
2654 | if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) { | |
2655 | pipe->pid_toggle = 1; | |
2656 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2657 | } else { | |
2658 | transaction->stage = CVMX_USB_STAGE_DATA; | |
2659 | } | |
2660 | break; | |
2661 | case CVMX_USB_STAGE_STATUS: | |
2662 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
2663 | transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE; | |
2664 | else | |
2665 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2666 | break; | |
2667 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: | |
2668 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2669 | break; | |
2670 | } | |
2671 | break; | |
2672 | case CVMX_USB_TRANSFER_BULK: | |
2673 | case CVMX_USB_TRANSFER_INTERRUPT: | |
2674 | /* | |
2675 | * The only time a bulk transfer isn't complete when it | |
2676 | * finishes with an ACK is during a split transaction. | |
2677 | * For splits we need to continue the transfer if more | |
2678 | * data is needed | |
2679 | */ | |
2680 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2681 | if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL) | |
2682 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; | |
2683 | else { | |
2684 | if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet)) | |
2685 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; | |
2686 | else { | |
2687 | if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT) | |
2688 | pipe->next_tx_frame += pipe->interval; | |
2689 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2690 | } | |
2691 | } | |
2692 | } else { | |
2693 | if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && | |
2694 | (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && | |
2695 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) && | |
2696 | (usbc_hcint.s.nak)) | |
2697 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; | |
2698 | if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) { | |
2699 | if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT) | |
2700 | pipe->next_tx_frame += pipe->interval; | |
2701 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2702 | } | |
2703 | } | |
2704 | break; | |
2705 | case CVMX_USB_TRANSFER_ISOCHRONOUS: | |
2706 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2707 | /* | |
2708 | * ISOCHRONOUS OUT splits don't require a | |
2709 | * complete split stage. Instead they use a | |
2710 | * sequence of begin OUT splits to transfer the | |
2711 | * data 188 bytes at a time. Once the transfer | |
2712 | * is complete, the pipe sleeps until the next | |
2713 | * schedule interval | |
2714 | */ | |
2715 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { | |
2716 | /* | |
2717 | * If no space left or this wasn't a max | |
2718 | * size packet then this transfer is | |
2719 | * complete. Otherwise start it again to | |
2720 | * send the next 188 bytes | |
2721 | */ | |
2722 | if (!buffer_space_left || (bytes_this_transfer < 188)) { | |
2723 | pipe->next_tx_frame += pipe->interval; | |
2724 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2725 | } | |
2726 | } else { | |
2727 | if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) { | |
2728 | /* | |
2729 | * We are in the incoming data | |
2730 | * phase. Keep getting data | |
2731 | * until we run out of space or | |
2732 | * get a small packet | |
2733 | */ | |
2734 | if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) { | |
2735 | pipe->next_tx_frame += pipe->interval; | |
2736 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2737 | } | |
2738 | } else | |
2739 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; | |
2740 | } | |
2741 | } else { | |
2742 | pipe->next_tx_frame += pipe->interval; | |
2743 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2744 | } | |
2745 | break; | |
2746 | } | |
2747 | } else if (usbc_hcint.s.nak) { | |
2748 | /* | |
2749 | * If this was a split then clear our split in progress marker. | |
2750 | */ | |
2751 | if (usb->active_split == transaction) | |
2752 | usb->active_split = NULL; | |
2753 | /* | |
2754 | * NAK as a response means the device couldn't accept the | |
2755 | * transaction, but it should be retried in the future. Rewind | |
2756 | * to the beginning of the transaction by anding off the split | |
2757 | * complete bit. Retry in the next interval | |
2758 | */ | |
2759 | transaction->retries = 0; | |
2760 | transaction->stage &= ~1; | |
2761 | pipe->next_tx_frame += pipe->interval; | |
2762 | if (pipe->next_tx_frame < usb->frame_number) | |
2763 | pipe->next_tx_frame = usb->frame_number + pipe->interval - | |
2764 | (usb->frame_number - pipe->next_tx_frame) % pipe->interval; | |
2765 | } else { | |
2766 | struct cvmx_usb_port_status port; | |
cb61c600 | 2767 | port = cvmx_usb_get_status(usb); |
6570b4a9 AK |
2768 | if (port.port_enabled) { |
2769 | /* We'll retry the exact same transaction again */ | |
2770 | transaction->retries++; | |
2771 | } else { | |
2772 | /* | |
2773 | * We get channel halted interrupts with no result bits | |
2774 | * sets when the cable is unplugged | |
2775 | */ | |
2776 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR); | |
2777 | } | |
2778 | } | |
2779 | return 0; | |
2780 | } | |
2781 | ||
393e2146 AK |
2782 | static void octeon_usb_port_callback(struct cvmx_usb_state *usb) |
2783 | { | |
2784 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); | |
2785 | ||
2786 | spin_unlock(&priv->lock); | |
2787 | usb_hcd_poll_rh_status(octeon_to_hcd(priv)); | |
2788 | spin_lock(&priv->lock); | |
2789 | } | |
6570b4a9 AK |
2790 | |
2791 | /** | |
2792 | * Poll the USB block for status and call all needed callback | |
2793 | * handlers. This function is meant to be called in the interrupt | |
2794 | * handler for the USB controller. It can also be called | |
2795 | * periodically in a loop for non-interrupt based operation. | |
2796 | * | |
cb61c600 | 2797 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
2798 | * |
2799 | * Returns: 0 or a negative error code. | |
2800 | */ | |
cb61c600 | 2801 | static int cvmx_usb_poll(struct cvmx_usb_state *usb) |
6570b4a9 AK |
2802 | { |
2803 | union cvmx_usbcx_hfnum usbc_hfnum; | |
2804 | union cvmx_usbcx_gintsts usbc_gintsts; | |
6570b4a9 AK |
2805 | |
2806 | CVMX_PREFETCH(usb, 0); | |
2807 | CVMX_PREFETCH(usb, 1*128); | |
2808 | CVMX_PREFETCH(usb, 2*128); | |
2809 | CVMX_PREFETCH(usb, 3*128); | |
2810 | CVMX_PREFETCH(usb, 4*128); | |
2811 | ||
2812 | /* Update the frame counter */ | |
2813 | usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); | |
2814 | if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum) | |
2815 | usb->frame_number += 0x4000; | |
2816 | usb->frame_number &= ~0x3fffull; | |
2817 | usb->frame_number |= usbc_hfnum.s.frnum; | |
2818 | ||
2819 | /* Read the pending interrupts */ | |
2820 | usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index)); | |
2821 | ||
2822 | /* Clear the interrupts now that we know about them */ | |
2823 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32); | |
2824 | ||
2825 | if (usbc_gintsts.s.rxflvl) { | |
2826 | /* | |
2827 | * RxFIFO Non-Empty (RxFLvl) | |
2828 | * Indicates that there is at least one packet pending to be | |
2829 | * read from the RxFIFO. | |
2830 | * | |
2831 | * In DMA mode this is handled by hardware | |
2832 | */ | |
2833 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
2834 | __cvmx_usb_poll_rx_fifo(usb); | |
2835 | } | |
2836 | if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) { | |
2837 | /* Fill the Tx FIFOs when not in DMA mode */ | |
2838 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
2839 | __cvmx_usb_poll_tx_fifo(usb); | |
2840 | } | |
2841 | if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) { | |
2842 | union cvmx_usbcx_hprt usbc_hprt; | |
2843 | /* | |
2844 | * Disconnect Detected Interrupt (DisconnInt) | |
2845 | * Asserted when a device disconnect is detected. | |
2846 | * | |
2847 | * Host Port Interrupt (PrtInt) | |
2848 | * The core sets this bit to indicate a change in port status of | |
2849 | * one of the O2P USB core ports in Host mode. The application | |
2850 | * must read the Host Port Control and Status (HPRT) register to | |
2851 | * determine the exact event that caused this interrupt. The | |
2852 | * application must clear the appropriate status bit in the Host | |
2853 | * Port Control and Status register to clear this bit. | |
2854 | * | |
2855 | * Call the user's port callback | |
2856 | */ | |
393e2146 | 2857 | octeon_usb_port_callback(usb); |
6570b4a9 AK |
2858 | /* Clear the port change bits */ |
2859 | usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
2860 | usbc_hprt.s.prtena = 0; | |
2861 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32); | |
2862 | } | |
2863 | if (usbc_gintsts.s.hchint) { | |
2864 | /* | |
2865 | * Host Channels Interrupt (HChInt) | |
2866 | * The core sets this bit to indicate that an interrupt is | |
2867 | * pending on one of the channels of the core (in Host mode). | |
2868 | * The application must read the Host All Channels Interrupt | |
2869 | * (HAINT) register to determine the exact number of the channel | |
2870 | * on which the interrupt occurred, and then read the | |
2871 | * corresponding Host Channel-n Interrupt (HCINTn) register to | |
2872 | * determine the exact cause of the interrupt. The application | |
2873 | * must clear the appropriate status bit in the HCINTn register | |
2874 | * to clear this bit. | |
2875 | */ | |
2876 | union cvmx_usbcx_haint usbc_haint; | |
2877 | usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index)); | |
2878 | while (usbc_haint.u32) { | |
2879 | int channel; | |
2880 | ||
2881 | channel = __fls(usbc_haint.u32); | |
2882 | __cvmx_usb_poll_channel(usb, channel); | |
2883 | usbc_haint.u32 ^= 1<<channel; | |
2884 | } | |
2885 | } | |
2886 | ||
2887 | __cvmx_usb_schedule(usb, usbc_gintsts.s.sof); | |
2888 | ||
2889 | return 0; | |
2890 | } | |
2891 | ||
b164935b AK |
2892 | /* convert between an HCD pointer and the corresponding struct octeon_hcd */ |
2893 | static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd) | |
2894 | { | |
2895 | return (struct octeon_hcd *)(hcd->hcd_priv); | |
2896 | } | |
2897 | ||
b164935b AK |
2898 | static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd) |
2899 | { | |
771378bb AK |
2900 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
2901 | unsigned long flags; | |
71e06db3 | 2902 | |
771378bb AK |
2903 | spin_lock_irqsave(&priv->lock, flags); |
2904 | cvmx_usb_poll(&priv->usb); | |
2905 | spin_unlock_irqrestore(&priv->lock, flags); | |
2906 | return IRQ_HANDLED; | |
b164935b AK |
2907 | } |
2908 | ||
b164935b AK |
2909 | static int octeon_usb_start(struct usb_hcd *hcd) |
2910 | { | |
771378bb | 2911 | hcd->state = HC_STATE_RUNNING; |
771378bb | 2912 | return 0; |
b164935b AK |
2913 | } |
2914 | ||
2915 | static void octeon_usb_stop(struct usb_hcd *hcd) | |
2916 | { | |
771378bb | 2917 | hcd->state = HC_STATE_HALT; |
b164935b AK |
2918 | } |
2919 | ||
2920 | static int octeon_usb_get_frame_number(struct usb_hcd *hcd) | |
2921 | { | |
771378bb | 2922 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
71e06db3 | 2923 | |
771378bb | 2924 | return cvmx_usb_get_frame_number(&priv->usb); |
b164935b AK |
2925 | } |
2926 | ||
b164935b | 2927 | static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, |
771378bb AK |
2928 | struct urb *urb, |
2929 | gfp_t mem_flags) | |
b164935b | 2930 | { |
771378bb | 2931 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
71e06db3 | 2932 | struct device *dev = hcd->self.controller; |
3e1674c0 | 2933 | struct cvmx_usb_transaction *transaction = NULL; |
60f81507 | 2934 | struct cvmx_usb_pipe *pipe; |
771378bb | 2935 | unsigned long flags; |
6e0e1b00 | 2936 | struct cvmx_usb_iso_packet *iso_packet; |
771378bb AK |
2937 | struct usb_host_endpoint *ep = urb->ep; |
2938 | ||
771378bb AK |
2939 | urb->status = 0; |
2940 | INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */ | |
2941 | spin_lock_irqsave(&priv->lock, flags); | |
2942 | ||
2943 | if (!ep->hcpriv) { | |
394d4e08 | 2944 | enum cvmx_usb_transfer transfer_type; |
4918072e | 2945 | enum cvmx_usb_speed speed; |
771378bb AK |
2946 | int split_device = 0; |
2947 | int split_port = 0; | |
2948 | switch (usb_pipetype(urb->pipe)) { | |
2949 | case PIPE_ISOCHRONOUS: | |
2950 | transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS; | |
2951 | break; | |
2952 | case PIPE_INTERRUPT: | |
2953 | transfer_type = CVMX_USB_TRANSFER_INTERRUPT; | |
2954 | break; | |
2955 | case PIPE_CONTROL: | |
2956 | transfer_type = CVMX_USB_TRANSFER_CONTROL; | |
2957 | break; | |
2958 | default: | |
2959 | transfer_type = CVMX_USB_TRANSFER_BULK; | |
2960 | break; | |
2961 | } | |
2962 | switch (urb->dev->speed) { | |
2963 | case USB_SPEED_LOW: | |
2964 | speed = CVMX_USB_SPEED_LOW; | |
2965 | break; | |
2966 | case USB_SPEED_FULL: | |
2967 | speed = CVMX_USB_SPEED_FULL; | |
2968 | break; | |
2969 | default: | |
2970 | speed = CVMX_USB_SPEED_HIGH; | |
2971 | break; | |
2972 | } | |
87e7e57a AK |
2973 | /* |
2974 | * For slow devices on high speed ports we need to find the hub | |
2975 | * that does the speed translation so we know where to send the | |
2976 | * split transactions. | |
2977 | */ | |
771378bb | 2978 | if (speed != CVMX_USB_SPEED_HIGH) { |
87e7e57a AK |
2979 | /* |
2980 | * Start at this device and work our way up the usb | |
2981 | * tree. | |
2982 | */ | |
771378bb AK |
2983 | struct usb_device *dev = urb->dev; |
2984 | while (dev->parent) { | |
87e7e57a AK |
2985 | /* |
2986 | * If our parent is high speed then he'll | |
2987 | * receive the splits. | |
2988 | */ | |
771378bb AK |
2989 | if (dev->parent->speed == USB_SPEED_HIGH) { |
2990 | split_device = dev->parent->devnum; | |
2991 | split_port = dev->portnum; | |
2992 | break; | |
2993 | } | |
87e7e57a AK |
2994 | /* |
2995 | * Move up the tree one level. If we make it all | |
2996 | * the way up the tree, then the port must not | |
2997 | * be in high speed mode and we don't need a | |
2998 | * split. | |
2999 | */ | |
771378bb AK |
3000 | dev = dev->parent; |
3001 | } | |
3002 | } | |
60f81507 AK |
3003 | pipe = cvmx_usb_open_pipe(&priv->usb, usb_pipedevice(urb->pipe), |
3004 | usb_pipeendpoint(urb->pipe), speed, | |
3005 | le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff, | |
3006 | transfer_type, | |
3007 | usb_pipein(urb->pipe) ? | |
3008 | CVMX_USB_DIRECTION_IN : | |
3009 | CVMX_USB_DIRECTION_OUT, | |
3010 | urb->interval, | |
3011 | (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3, | |
3012 | split_device, split_port); | |
3013 | if (!pipe) { | |
771378bb | 3014 | spin_unlock_irqrestore(&priv->lock, flags); |
71e06db3 | 3015 | dev_dbg(dev, "Failed to create pipe\n"); |
771378bb AK |
3016 | return -ENOMEM; |
3017 | } | |
60f81507 | 3018 | ep->hcpriv = pipe; |
c7609eac | 3019 | } else { |
60f81507 | 3020 | pipe = ep->hcpriv; |
c7609eac | 3021 | } |
771378bb AK |
3022 | |
3023 | switch (usb_pipetype(urb->pipe)) { | |
3024 | case PIPE_ISOCHRONOUS: | |
71e06db3 AK |
3025 | dev_dbg(dev, "Submit isochronous to %d.%d\n", |
3026 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
87e7e57a AK |
3027 | /* |
3028 | * Allocate a structure to use for our private list of | |
3029 | * isochronous packets. | |
3030 | */ | |
6e0e1b00 AK |
3031 | iso_packet = kmalloc(urb->number_of_packets * |
3032 | sizeof(struct cvmx_usb_iso_packet), | |
3033 | GFP_ATOMIC); | |
771378bb AK |
3034 | if (iso_packet) { |
3035 | int i; | |
3036 | /* Fill the list with the data from the URB */ | |
3037 | for (i = 0; i < urb->number_of_packets; i++) { | |
3038 | iso_packet[i].offset = urb->iso_frame_desc[i].offset; | |
3039 | iso_packet[i].length = urb->iso_frame_desc[i].length; | |
3040 | iso_packet[i].status = CVMX_USB_COMPLETE_ERROR; | |
3041 | } | |
87e7e57a AK |
3042 | /* |
3043 | * Store a pointer to the list in the URB setup_packet | |
3044 | * field. We know this currently isn't being used and | |
3045 | * this saves us a bunch of logic. | |
3046 | */ | |
771378bb | 3047 | urb->setup_packet = (char *)iso_packet; |
3e1674c0 AK |
3048 | transaction = cvmx_usb_submit_isochronous(&priv->usb, |
3049 | pipe, urb); | |
87e7e57a AK |
3050 | /* |
3051 | * If submit failed we need to free our private packet | |
3052 | * list. | |
3053 | */ | |
3e1674c0 | 3054 | if (!transaction) { |
771378bb AK |
3055 | urb->setup_packet = NULL; |
3056 | kfree(iso_packet); | |
3057 | } | |
3058 | } | |
3059 | break; | |
3060 | case PIPE_INTERRUPT: | |
71e06db3 AK |
3061 | dev_dbg(dev, "Submit interrupt to %d.%d\n", |
3062 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
3e1674c0 | 3063 | transaction = cvmx_usb_submit_interrupt(&priv->usb, pipe, urb); |
771378bb AK |
3064 | break; |
3065 | case PIPE_CONTROL: | |
71e06db3 AK |
3066 | dev_dbg(dev, "Submit control to %d.%d\n", |
3067 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
3e1674c0 | 3068 | transaction = cvmx_usb_submit_control(&priv->usb, pipe, urb); |
771378bb AK |
3069 | break; |
3070 | case PIPE_BULK: | |
71e06db3 AK |
3071 | dev_dbg(dev, "Submit bulk to %d.%d\n", |
3072 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
3e1674c0 | 3073 | transaction = cvmx_usb_submit_bulk(&priv->usb, pipe, urb); |
771378bb AK |
3074 | break; |
3075 | } | |
3e1674c0 | 3076 | if (!transaction) { |
771378bb | 3077 | spin_unlock_irqrestore(&priv->lock, flags); |
71e06db3 | 3078 | dev_dbg(dev, "Failed to submit\n"); |
771378bb AK |
3079 | return -ENOMEM; |
3080 | } | |
3e1674c0 | 3081 | urb->hcpriv = transaction; |
771378bb AK |
3082 | spin_unlock_irqrestore(&priv->lock, flags); |
3083 | return 0; | |
b164935b AK |
3084 | } |
3085 | ||
3086 | static void octeon_usb_urb_dequeue_work(unsigned long arg) | |
3087 | { | |
f011fefa AK |
3088 | struct urb *urb; |
3089 | struct urb *next; | |
771378bb AK |
3090 | unsigned long flags; |
3091 | struct octeon_hcd *priv = (struct octeon_hcd *)arg; | |
3092 | ||
3093 | spin_lock_irqsave(&priv->lock, flags); | |
3094 | ||
f011fefa | 3095 | list_for_each_entry_safe(urb, next, &priv->dequeue_list, urb_list) { |
244544a1 | 3096 | list_del_init(&urb->urb_list); |
3e1674c0 | 3097 | cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, urb->hcpriv); |
771378bb AK |
3098 | } |
3099 | ||
3100 | spin_unlock_irqrestore(&priv->lock, flags); | |
b164935b AK |
3101 | } |
3102 | ||
3103 | static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
3104 | { | |
771378bb AK |
3105 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
3106 | unsigned long flags; | |
b164935b | 3107 | |
771378bb AK |
3108 | if (!urb->dev) |
3109 | return -EINVAL; | |
b164935b | 3110 | |
771378bb | 3111 | spin_lock_irqsave(&priv->lock, flags); |
b164935b | 3112 | |
771378bb AK |
3113 | urb->status = status; |
3114 | list_add_tail(&urb->urb_list, &priv->dequeue_list); | |
b164935b | 3115 | |
771378bb | 3116 | spin_unlock_irqrestore(&priv->lock, flags); |
b164935b | 3117 | |
771378bb | 3118 | tasklet_schedule(&priv->dequeue_tasklet); |
b164935b | 3119 | |
771378bb | 3120 | return 0; |
b164935b AK |
3121 | } |
3122 | ||
3123 | static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep) | |
3124 | { | |
71e06db3 AK |
3125 | struct device *dev = hcd->self.controller; |
3126 | ||
771378bb AK |
3127 | if (ep->hcpriv) { |
3128 | struct octeon_hcd *priv = hcd_to_octeon(hcd); | |
60f81507 | 3129 | struct cvmx_usb_pipe *pipe = ep->hcpriv; |
771378bb AK |
3130 | unsigned long flags; |
3131 | spin_lock_irqsave(&priv->lock, flags); | |
60f81507 AK |
3132 | cvmx_usb_cancel_all(&priv->usb, pipe); |
3133 | if (cvmx_usb_close_pipe(&priv->usb, pipe)) | |
3134 | dev_dbg(dev, "Closing pipe %p failed\n", pipe); | |
771378bb AK |
3135 | spin_unlock_irqrestore(&priv->lock, flags); |
3136 | ep->hcpriv = NULL; | |
3137 | } | |
b164935b AK |
3138 | } |
3139 | ||
3140 | static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf) | |
3141 | { | |
771378bb | 3142 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
51a19621 | 3143 | struct cvmx_usb_port_status port_status; |
771378bb | 3144 | unsigned long flags; |
b164935b | 3145 | |
771378bb AK |
3146 | spin_lock_irqsave(&priv->lock, flags); |
3147 | port_status = cvmx_usb_get_status(&priv->usb); | |
3148 | spin_unlock_irqrestore(&priv->lock, flags); | |
3149 | buf[0] = 0; | |
3150 | buf[0] = port_status.connect_change << 1; | |
b164935b | 3151 | |
771378bb | 3152 | return (buf[0] != 0); |
b164935b AK |
3153 | } |
3154 | ||
3155 | static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength) | |
3156 | { | |
771378bb | 3157 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
71e06db3 | 3158 | struct device *dev = hcd->self.controller; |
51a19621 | 3159 | struct cvmx_usb_port_status usb_port_status; |
771378bb AK |
3160 | int port_status; |
3161 | struct usb_hub_descriptor *desc; | |
3162 | unsigned long flags; | |
3163 | ||
3164 | switch (typeReq) { | |
3165 | case ClearHubFeature: | |
71e06db3 | 3166 | dev_dbg(dev, "ClearHubFeature\n"); |
771378bb AK |
3167 | switch (wValue) { |
3168 | case C_HUB_LOCAL_POWER: | |
3169 | case C_HUB_OVER_CURRENT: | |
3170 | /* Nothing required here */ | |
3171 | break; | |
3172 | default: | |
3173 | return -EINVAL; | |
3174 | } | |
3175 | break; | |
3176 | case ClearPortFeature: | |
71e06db3 | 3177 | dev_dbg(dev, "ClearPortFeature\n"); |
771378bb | 3178 | if (wIndex != 1) { |
71e06db3 | 3179 | dev_dbg(dev, " INVALID\n"); |
771378bb AK |
3180 | return -EINVAL; |
3181 | } | |
3182 | ||
3183 | switch (wValue) { | |
3184 | case USB_PORT_FEAT_ENABLE: | |
71e06db3 | 3185 | dev_dbg(dev, " ENABLE\n"); |
771378bb AK |
3186 | spin_lock_irqsave(&priv->lock, flags); |
3187 | cvmx_usb_disable(&priv->usb); | |
3188 | spin_unlock_irqrestore(&priv->lock, flags); | |
3189 | break; | |
3190 | case USB_PORT_FEAT_SUSPEND: | |
71e06db3 | 3191 | dev_dbg(dev, " SUSPEND\n"); |
771378bb AK |
3192 | /* Not supported on Octeon */ |
3193 | break; | |
3194 | case USB_PORT_FEAT_POWER: | |
71e06db3 | 3195 | dev_dbg(dev, " POWER\n"); |
771378bb AK |
3196 | /* Not supported on Octeon */ |
3197 | break; | |
3198 | case USB_PORT_FEAT_INDICATOR: | |
71e06db3 | 3199 | dev_dbg(dev, " INDICATOR\n"); |
771378bb AK |
3200 | /* Port inidicator not supported */ |
3201 | break; | |
3202 | case USB_PORT_FEAT_C_CONNECTION: | |
71e06db3 | 3203 | dev_dbg(dev, " C_CONNECTION\n"); |
771378bb AK |
3204 | /* Clears drivers internal connect status change flag */ |
3205 | spin_lock_irqsave(&priv->lock, flags); | |
29a202fa | 3206 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3207 | spin_unlock_irqrestore(&priv->lock, flags); |
3208 | break; | |
3209 | case USB_PORT_FEAT_C_RESET: | |
71e06db3 | 3210 | dev_dbg(dev, " C_RESET\n"); |
87e7e57a AK |
3211 | /* |
3212 | * Clears the driver's internal Port Reset Change flag. | |
3213 | */ | |
771378bb | 3214 | spin_lock_irqsave(&priv->lock, flags); |
29a202fa | 3215 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3216 | spin_unlock_irqrestore(&priv->lock, flags); |
3217 | break; | |
3218 | case USB_PORT_FEAT_C_ENABLE: | |
71e06db3 | 3219 | dev_dbg(dev, " C_ENABLE\n"); |
87e7e57a AK |
3220 | /* |
3221 | * Clears the driver's internal Port Enable/Disable | |
3222 | * Change flag. | |
3223 | */ | |
771378bb | 3224 | spin_lock_irqsave(&priv->lock, flags); |
29a202fa | 3225 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3226 | spin_unlock_irqrestore(&priv->lock, flags); |
3227 | break; | |
3228 | case USB_PORT_FEAT_C_SUSPEND: | |
71e06db3 | 3229 | dev_dbg(dev, " C_SUSPEND\n"); |
87e7e57a AK |
3230 | /* |
3231 | * Clears the driver's internal Port Suspend Change | |
3232 | * flag, which is set when resume signaling on the host | |
3233 | * port is complete. | |
3234 | */ | |
771378bb AK |
3235 | break; |
3236 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
71e06db3 | 3237 | dev_dbg(dev, " C_OVER_CURRENT\n"); |
771378bb AK |
3238 | /* Clears the driver's overcurrent Change flag */ |
3239 | spin_lock_irqsave(&priv->lock, flags); | |
29a202fa | 3240 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3241 | spin_unlock_irqrestore(&priv->lock, flags); |
3242 | break; | |
3243 | default: | |
71e06db3 | 3244 | dev_dbg(dev, " UNKNOWN\n"); |
771378bb AK |
3245 | return -EINVAL; |
3246 | } | |
771378bb AK |
3247 | break; |
3248 | case GetHubDescriptor: | |
71e06db3 | 3249 | dev_dbg(dev, "GetHubDescriptor\n"); |
771378bb AK |
3250 | desc = (struct usb_hub_descriptor *)buf; |
3251 | desc->bDescLength = 9; | |
3252 | desc->bDescriptorType = 0x29; | |
3253 | desc->bNbrPorts = 1; | |
3254 | desc->wHubCharacteristics = 0x08; | |
3255 | desc->bPwrOn2PwrGood = 1; | |
3256 | desc->bHubContrCurrent = 0; | |
3257 | desc->u.hs.DeviceRemovable[0] = 0; | |
3258 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
3259 | break; | |
3260 | case GetHubStatus: | |
71e06db3 | 3261 | dev_dbg(dev, "GetHubStatus\n"); |
771378bb AK |
3262 | *(__le32 *) buf = 0; |
3263 | break; | |
3264 | case GetPortStatus: | |
71e06db3 | 3265 | dev_dbg(dev, "GetPortStatus\n"); |
771378bb | 3266 | if (wIndex != 1) { |
71e06db3 | 3267 | dev_dbg(dev, " INVALID\n"); |
771378bb AK |
3268 | return -EINVAL; |
3269 | } | |
3270 | ||
3271 | spin_lock_irqsave(&priv->lock, flags); | |
3272 | usb_port_status = cvmx_usb_get_status(&priv->usb); | |
3273 | spin_unlock_irqrestore(&priv->lock, flags); | |
3274 | port_status = 0; | |
3275 | ||
3276 | if (usb_port_status.connect_change) { | |
3277 | port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); | |
71e06db3 | 3278 | dev_dbg(dev, " C_CONNECTION\n"); |
771378bb AK |
3279 | } |
3280 | ||
3281 | if (usb_port_status.port_enabled) { | |
3282 | port_status |= (1 << USB_PORT_FEAT_C_ENABLE); | |
71e06db3 | 3283 | dev_dbg(dev, " C_ENABLE\n"); |
771378bb AK |
3284 | } |
3285 | ||
3286 | if (usb_port_status.connected) { | |
3287 | port_status |= (1 << USB_PORT_FEAT_CONNECTION); | |
71e06db3 | 3288 | dev_dbg(dev, " CONNECTION\n"); |
771378bb AK |
3289 | } |
3290 | ||
3291 | if (usb_port_status.port_enabled) { | |
3292 | port_status |= (1 << USB_PORT_FEAT_ENABLE); | |
71e06db3 | 3293 | dev_dbg(dev, " ENABLE\n"); |
771378bb AK |
3294 | } |
3295 | ||
3296 | if (usb_port_status.port_over_current) { | |
3297 | port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT); | |
71e06db3 | 3298 | dev_dbg(dev, " OVER_CURRENT\n"); |
771378bb AK |
3299 | } |
3300 | ||
3301 | if (usb_port_status.port_powered) { | |
3302 | port_status |= (1 << USB_PORT_FEAT_POWER); | |
71e06db3 | 3303 | dev_dbg(dev, " POWER\n"); |
771378bb AK |
3304 | } |
3305 | ||
3306 | if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) { | |
3307 | port_status |= USB_PORT_STAT_HIGH_SPEED; | |
71e06db3 | 3308 | dev_dbg(dev, " HIGHSPEED\n"); |
771378bb AK |
3309 | } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) { |
3310 | port_status |= (1 << USB_PORT_FEAT_LOWSPEED); | |
71e06db3 | 3311 | dev_dbg(dev, " LOWSPEED\n"); |
771378bb AK |
3312 | } |
3313 | ||
3314 | *((__le32 *) buf) = cpu_to_le32(port_status); | |
771378bb AK |
3315 | break; |
3316 | case SetHubFeature: | |
71e06db3 | 3317 | dev_dbg(dev, "SetHubFeature\n"); |
771378bb AK |
3318 | /* No HUB features supported */ |
3319 | break; | |
3320 | case SetPortFeature: | |
71e06db3 | 3321 | dev_dbg(dev, "SetPortFeature\n"); |
771378bb | 3322 | if (wIndex != 1) { |
71e06db3 | 3323 | dev_dbg(dev, " INVALID\n"); |
771378bb AK |
3324 | return -EINVAL; |
3325 | } | |
3326 | ||
3327 | switch (wValue) { | |
3328 | case USB_PORT_FEAT_SUSPEND: | |
71e06db3 | 3329 | dev_dbg(dev, " SUSPEND\n"); |
771378bb AK |
3330 | return -EINVAL; |
3331 | case USB_PORT_FEAT_POWER: | |
71e06db3 | 3332 | dev_dbg(dev, " POWER\n"); |
771378bb AK |
3333 | return -EINVAL; |
3334 | case USB_PORT_FEAT_RESET: | |
71e06db3 | 3335 | dev_dbg(dev, " RESET\n"); |
771378bb AK |
3336 | spin_lock_irqsave(&priv->lock, flags); |
3337 | cvmx_usb_disable(&priv->usb); | |
3338 | if (cvmx_usb_enable(&priv->usb)) | |
71e06db3 | 3339 | dev_dbg(dev, "Failed to enable the port\n"); |
771378bb AK |
3340 | spin_unlock_irqrestore(&priv->lock, flags); |
3341 | return 0; | |
3342 | case USB_PORT_FEAT_INDICATOR: | |
71e06db3 | 3343 | dev_dbg(dev, " INDICATOR\n"); |
771378bb AK |
3344 | /* Not supported */ |
3345 | break; | |
3346 | default: | |
71e06db3 | 3347 | dev_dbg(dev, " UNKNOWN\n"); |
771378bb AK |
3348 | return -EINVAL; |
3349 | } | |
3350 | break; | |
3351 | default: | |
71e06db3 | 3352 | dev_dbg(dev, "Unknown root hub request\n"); |
771378bb AK |
3353 | return -EINVAL; |
3354 | } | |
3355 | return 0; | |
b164935b AK |
3356 | } |
3357 | ||
b164935b | 3358 | static const struct hc_driver octeon_hc_driver = { |
771378bb AK |
3359 | .description = "Octeon USB", |
3360 | .product_desc = "Octeon Host Controller", | |
3361 | .hcd_priv_size = sizeof(struct octeon_hcd), | |
3362 | .irq = octeon_usb_irq, | |
3363 | .flags = HCD_MEMORY | HCD_USB2, | |
3364 | .start = octeon_usb_start, | |
3365 | .stop = octeon_usb_stop, | |
3366 | .urb_enqueue = octeon_usb_urb_enqueue, | |
3367 | .urb_dequeue = octeon_usb_urb_dequeue, | |
3368 | .endpoint_disable = octeon_usb_endpoint_disable, | |
3369 | .get_frame_number = octeon_usb_get_frame_number, | |
3370 | .hub_status_data = octeon_usb_hub_status_data, | |
3371 | .hub_control = octeon_usb_hub_control, | |
b164935b AK |
3372 | }; |
3373 | ||
b91619c2 | 3374 | static int octeon_usb_probe(struct platform_device *pdev) |
b164935b | 3375 | { |
771378bb | 3376 | int status; |
b91619c2 DD |
3377 | int initialize_flags; |
3378 | int usb_num; | |
3379 | struct resource *res_mem; | |
3380 | struct device_node *usbn_node; | |
3381 | int irq = platform_get_irq(pdev, 0); | |
3382 | struct device *dev = &pdev->dev; | |
771378bb AK |
3383 | struct octeon_hcd *priv; |
3384 | struct usb_hcd *hcd; | |
3385 | unsigned long flags; | |
b91619c2 DD |
3386 | u32 clock_rate = 48000000; |
3387 | bool is_crystal_clock = false; | |
3388 | const char *clock_type; | |
3389 | int i; | |
3390 | ||
3391 | if (dev->of_node == NULL) { | |
3392 | dev_err(dev, "Error: empty of_node\n"); | |
3393 | return -ENXIO; | |
3394 | } | |
3395 | usbn_node = dev->of_node->parent; | |
3396 | ||
3397 | i = of_property_read_u32(usbn_node, | |
3398 | "refclk-frequency", &clock_rate); | |
3399 | if (i) { | |
3400 | dev_err(dev, "No USBN \"refclk-frequency\"\n"); | |
3401 | return -ENXIO; | |
3402 | } | |
3403 | switch (clock_rate) { | |
3404 | case 12000000: | |
3405 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ; | |
3406 | break; | |
3407 | case 24000000: | |
3408 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ; | |
3409 | break; | |
3410 | case 48000000: | |
3411 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ; | |
3412 | break; | |
3413 | default: | |
3414 | dev_err(dev, "Illebal USBN \"refclk-frequency\" %u\n", clock_rate); | |
3415 | return -ENXIO; | |
3416 | ||
3417 | } | |
3418 | ||
3419 | i = of_property_read_string(usbn_node, | |
3420 | "refclk-type", &clock_type); | |
3421 | ||
3422 | if (!i && strcmp("crystal", clock_type) == 0) | |
3423 | is_crystal_clock = true; | |
3424 | ||
3425 | if (is_crystal_clock) | |
3426 | initialize_flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; | |
3427 | else | |
3428 | initialize_flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND; | |
3429 | ||
3430 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
3431 | if (res_mem == NULL) { | |
3432 | dev_err(dev, "found no memory resource\n"); | |
3433 | return -ENXIO; | |
3434 | } | |
3435 | usb_num = (res_mem->start >> 44) & 1; | |
3436 | ||
3437 | if (irq < 0) { | |
3438 | /* Defective device tree, but we know how to fix it. */ | |
3439 | irq_hw_number_t hwirq = usb_num ? (1 << 6) + 17 : 56; | |
3440 | irq = irq_create_mapping(NULL, hwirq); | |
3441 | } | |
771378bb | 3442 | |
87e7e57a AK |
3443 | /* |
3444 | * Set the DMA mask to 64bits so we get buffers already translated for | |
3445 | * DMA. | |
3446 | */ | |
771378bb AK |
3447 | dev->coherent_dma_mask = ~0; |
3448 | dev->dma_mask = &dev->coherent_dma_mask; | |
3449 | ||
b91619c2 DD |
3450 | /* |
3451 | * Only cn52XX and cn56XX have DWC_OTG USB hardware and the | |
3452 | * IOB priority registers. Under heavy network load USB | |
3453 | * hardware can be starved by the IOB causing a crash. Give | |
3454 | * it a priority boost if it has been waiting more than 400 | |
3455 | * cycles to avoid this situation. | |
3456 | * | |
3457 | * Testing indicates that a cnt_val of 8192 is not sufficient, | |
3458 | * but no failures are seen with 4096. We choose a value of | |
3459 | * 400 to give a safety factor of 10. | |
3460 | */ | |
3461 | if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) { | |
3462 | union cvmx_iob_n2c_l2c_pri_cnt pri_cnt; | |
3463 | ||
3464 | pri_cnt.u64 = 0; | |
3465 | pri_cnt.s.cnt_enb = 1; | |
3466 | pri_cnt.s.cnt_val = 400; | |
3467 | cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64); | |
3468 | } | |
3469 | ||
771378bb AK |
3470 | hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev)); |
3471 | if (!hcd) { | |
71e06db3 | 3472 | dev_dbg(dev, "Failed to allocate memory for HCD\n"); |
771378bb AK |
3473 | return -1; |
3474 | } | |
3475 | hcd->uses_new_polling = 1; | |
3476 | priv = (struct octeon_hcd *)hcd->hcd_priv; | |
3477 | ||
3478 | spin_lock_init(&priv->lock); | |
3479 | ||
3480 | tasklet_init(&priv->dequeue_tasklet, octeon_usb_urb_dequeue_work, (unsigned long)priv); | |
3481 | INIT_LIST_HEAD(&priv->dequeue_list); | |
3482 | ||
b91619c2 | 3483 | status = cvmx_usb_initialize(&priv->usb, usb_num, initialize_flags); |
771378bb | 3484 | if (status) { |
71e06db3 | 3485 | dev_dbg(dev, "USB initialization failed with %d\n", status); |
771378bb AK |
3486 | kfree(hcd); |
3487 | return -1; | |
3488 | } | |
3489 | ||
3490 | /* This delay is needed for CN3010, but I don't know why... */ | |
3491 | mdelay(10); | |
3492 | ||
3493 | spin_lock_irqsave(&priv->lock, flags); | |
3494 | cvmx_usb_poll(&priv->usb); | |
3495 | spin_unlock_irqrestore(&priv->lock, flags); | |
3496 | ||
b91619c2 | 3497 | status = usb_add_hcd(hcd, irq, 0); |
771378bb | 3498 | if (status) { |
71e06db3 | 3499 | dev_dbg(dev, "USB add HCD failed with %d\n", status); |
771378bb AK |
3500 | kfree(hcd); |
3501 | return -1; | |
3502 | } | |
3c9740a1 | 3503 | device_wakeup_enable(hcd->self.controller); |
771378bb | 3504 | |
b91619c2 | 3505 | dev_info(dev, "Registered HCD for port %d on irq %d\n", usb_num, irq); |
771378bb AK |
3506 | |
3507 | return 0; | |
b164935b AK |
3508 | } |
3509 | ||
b91619c2 | 3510 | static int octeon_usb_remove(struct platform_device *pdev) |
b164935b | 3511 | { |
771378bb | 3512 | int status; |
b91619c2 | 3513 | struct device *dev = &pdev->dev; |
771378bb AK |
3514 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
3515 | struct octeon_hcd *priv = hcd_to_octeon(hcd); | |
3516 | unsigned long flags; | |
b164935b | 3517 | |
771378bb AK |
3518 | usb_remove_hcd(hcd); |
3519 | tasklet_kill(&priv->dequeue_tasklet); | |
3520 | spin_lock_irqsave(&priv->lock, flags); | |
3521 | status = cvmx_usb_shutdown(&priv->usb); | |
3522 | spin_unlock_irqrestore(&priv->lock, flags); | |
3523 | if (status) | |
71e06db3 | 3524 | dev_dbg(dev, "USB shutdown failed with %d\n", status); |
b164935b | 3525 | |
771378bb | 3526 | kfree(hcd); |
b164935b | 3527 | |
771378bb | 3528 | return 0; |
b164935b AK |
3529 | } |
3530 | ||
b91619c2 DD |
3531 | static struct of_device_id octeon_usb_match[] = { |
3532 | { | |
3533 | .compatible = "cavium,octeon-5750-usbc", | |
3534 | }, | |
3535 | {}, | |
b164935b AK |
3536 | }; |
3537 | ||
b91619c2 DD |
3538 | static struct platform_driver octeon_usb_driver = { |
3539 | .driver = { | |
3540 | .name = "OcteonUSB", | |
3541 | .owner = THIS_MODULE, | |
3542 | .of_match_table = octeon_usb_match, | |
3543 | }, | |
3544 | .probe = octeon_usb_probe, | |
3545 | .remove = octeon_usb_remove, | |
3546 | }; | |
b164935b | 3547 | |
b91619c2 | 3548 | static int __init octeon_usb_driver_init(void) |
b164935b | 3549 | { |
b91619c2 DD |
3550 | if (usb_disabled()) |
3551 | return 0; | |
771378bb | 3552 | |
b91619c2 | 3553 | return platform_driver_register(&octeon_usb_driver); |
b164935b | 3554 | } |
b91619c2 | 3555 | module_init(octeon_usb_driver_init); |
b164935b | 3556 | |
b91619c2 | 3557 | static void __exit octeon_usb_driver_exit(void) |
b164935b | 3558 | { |
b91619c2 DD |
3559 | if (usb_disabled()) |
3560 | return; | |
71e06db3 | 3561 | |
b91619c2 | 3562 | platform_driver_unregister(&octeon_usb_driver); |
b164935b | 3563 | } |
b91619c2 | 3564 | module_exit(octeon_usb_driver_exit); |
b164935b AK |
3565 | |
3566 | MODULE_LICENSE("GPL"); | |
b91619c2 DD |
3567 | MODULE_AUTHOR("Cavium, Inc. <support@cavium.com>"); |
3568 | MODULE_DESCRIPTION("Cavium Inc. OCTEON USB Host driver."); |