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authorDavid Lopo <dlopo@chipidea.mips.com>2008-11-17 17:14:51 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-07 12:59:58 -0500
commitaa69a8093ff985873cb44fe1157bd6db29a20fe4 (patch)
treec3cf9484e9f9a607e3076fd538f57246b482c1ed /drivers/usb/gadget
parentbb9496c6f7e853e5d4edd5397c9d45f1968d623c (diff)
USB: gadget: MIPS ci13xxx_udc
MIPS USB IP core family device controller Currently it only supports IP part number CI13412. [dbrownell@users.sourceforge.net: minor comment tweaks] Signed-off-by: David Lopo <dlopo@chipidea.mips.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/Kconfig18
-rw-r--r--drivers/usb/gadget/Makefile1
-rw-r--r--drivers/usb/gadget/ci13xxx_udc.c2830
-rw-r--r--drivers/usb/gadget/ci13xxx_udc.h195
-rw-r--r--drivers/usb/gadget/gadget_chips.h7
5 files changed, 3051 insertions, 0 deletions
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index dd4cd5a51370..cf3a662c3335 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -377,6 +377,24 @@ config USB_FSL_QE
377 default USB_GADGET 377 default USB_GADGET
378 select USB_GADGET_SELECTED 378 select USB_GADGET_SELECTED
379 379
380config USB_GADGET_CI13XXX
381 boolean "MIPS USB CI13xxx"
382 depends on PCI
383 select USB_GADGET_DUALSPEED
384 help
385 MIPS USB IP core family device controller
386 Currently it only supports IP part number CI13412
387
388 Say "y" to link the driver statically, or "m" to build a
389 dynamically linked module called "ci13xxx_udc" and force all
390 gadget drivers to also be dynamically linked.
391
392config USB_CI13XXX
393 tristate
394 depends on USB_GADGET_CI13XXX
395 default USB_GADGET
396 select USB_GADGET_SELECTED
397
380config USB_GADGET_NET2280 398config USB_GADGET_NET2280
381 boolean "NetChip 228x" 399 boolean "NetChip 228x"
382 depends on PCI 400 depends on PCI
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index bd4041b47dce..5d64a2ab1889 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_USB_ATMEL_USBA) += atmel_usba_udc.o
19obj-$(CONFIG_USB_FSL_USB2) += fsl_usb2_udc.o 19obj-$(CONFIG_USB_FSL_USB2) += fsl_usb2_udc.o
20obj-$(CONFIG_USB_M66592) += m66592-udc.o 20obj-$(CONFIG_USB_M66592) += m66592-udc.o
21obj-$(CONFIG_USB_FSL_QE) += fsl_qe_udc.o 21obj-$(CONFIG_USB_FSL_QE) += fsl_qe_udc.o
22obj-$(CONFIG_USB_CI13XXX) += ci13xxx_udc.o
22 23
23# 24#
24# USB gadget drivers 25# USB gadget drivers
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
new file mode 100644
index 000000000000..bebf911c7e5f
--- /dev/null
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -0,0 +1,2830 @@
1/*
2 * ci13xxx_udc.c - MIPS USB IP core family device controller
3 *
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
5 *
6 * Author: David Lopo
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13/*
14 * Description: MIPS USB IP core family device controller
15 * Currently it only supports IP part number CI13412
16 *
17 * This driver is composed of several blocks:
18 * - HW: hardware interface
19 * - DBG: debug facilities (optional)
20 * - UTIL: utilities
21 * - ISR: interrupts handling
22 * - ENDPT: endpoint operations (Gadget API)
23 * - GADGET: gadget operations (Gadget API)
24 * - BUS: bus glue code, bus abstraction layer
25 * - PCI: PCI core interface and PCI resources (interrupts, memory...)
26 *
27 * Compile Options
28 * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
29 * - STALL_IN: non-empty bulk-in pipes cannot be halted
30 * if defined mass storage compliance succeeds but with warnings
31 * => case 4: Hi > Dn
32 * => case 5: Hi > Di
33 * => case 8: Hi <> Do
34 * if undefined usbtest 13 fails
35 * - TRACE: enable function tracing (depends on DEBUG)
36 *
37 * Main Features
38 * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
39 * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
40 * - Normal & LPM support
41 *
42 * USBTEST Report
43 * - OK: 0-12, 13 (STALL_IN defined) & 14
44 * - Not Supported: 15 & 16 (ISO)
45 *
46 * TODO List
47 * - OTG
48 * - Isochronous & Interrupt Traffic
49 * - Handle requests which spawns into several TDs
50 * - GET_STATUS(device) - always reports 0
51 * - Gadget API (majority of optional features)
52 * - Suspend & Remote Wakeup
53 */
54#include <linux/device.h>
55#include <linux/dmapool.h>
56#include <linux/dma-mapping.h>
57#include <linux/init.h>
58#include <linux/interrupt.h>
59#include <linux/interrupt.h>
60#include <linux/io.h>
61#include <linux/irq.h>
62#include <linux/kernel.h>
63#include <linux/module.h>
64#include <linux/pci.h>
65#include <linux/usb/ch9.h>
66#include <linux/usb/gadget.h>
67
68#include "ci13xxx_udc.h"
69
70
71/******************************************************************************
72 * DEFINE
73 *****************************************************************************/
74/* ctrl register bank access */
75static DEFINE_SPINLOCK(udc_lock);
76
77/* driver name */
78#define UDC_DRIVER_NAME "ci13xxx_udc"
79
80/* control endpoint description */
81static const struct usb_endpoint_descriptor
82ctrl_endpt_desc = {
83 .bLength = USB_DT_ENDPOINT_SIZE,
84 .bDescriptorType = USB_DT_ENDPOINT,
85
86 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
87 .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
88};
89
90/* UDC descriptor */
91static struct ci13xxx *_udc;
92
93/* Interrupt statistics */
94#define ISR_MASK 0x1F
95static struct {
96 u32 test;
97 u32 ui;
98 u32 uei;
99 u32 pci;
100 u32 uri;
101 u32 sli;
102 u32 none;
103 struct {
104 u32 cnt;
105 u32 buf[ISR_MASK+1];
106 u32 idx;
107 } hndl;
108} isr_statistics;
109
110/**
111 * ffs_nr: find first (least significant) bit set
112 * @x: the word to search
113 *
114 * This function returns bit number (instead of position)
115 */
116static int ffs_nr(u32 x)
117{
118 int n = ffs(x);
119
120 return n ? n-1 : 32;
121}
122
123/******************************************************************************
124 * HW block
125 *****************************************************************************/
126/* register bank descriptor */
127static struct {
128 unsigned lpm; /* is LPM? */
129 void __iomem *abs; /* bus map offset */
130 void __iomem *cap; /* bus map offset + CAP offset + CAP data */
131 size_t size; /* bank size */
132} hw_bank;
133
134/* UDC register map */
135#define ABS_CAPLENGTH (0x100UL)
136#define ABS_HCCPARAMS (0x108UL)
137#define ABS_DCCPARAMS (0x124UL)
138#define ABS_TESTMODE (hw_bank.lpm ? 0x0FCUL : 0x138UL)
139/* offset to CAPLENTGH (addr + data) */
140#define CAP_USBCMD (0x000UL)
141#define CAP_USBSTS (0x004UL)
142#define CAP_USBINTR (0x008UL)
143#define CAP_DEVICEADDR (0x014UL)
144#define CAP_ENDPTLISTADDR (0x018UL)
145#define CAP_PORTSC (0x044UL)
146#define CAP_DEVLC (0x0B4UL)
147#define CAP_USBMODE (hw_bank.lpm ? 0x0C8UL : 0x068UL)
148#define CAP_ENDPTSETUPSTAT (hw_bank.lpm ? 0x0D8UL : 0x06CUL)
149#define CAP_ENDPTPRIME (hw_bank.lpm ? 0x0DCUL : 0x070UL)
150#define CAP_ENDPTFLUSH (hw_bank.lpm ? 0x0E0UL : 0x074UL)
151#define CAP_ENDPTSTAT (hw_bank.lpm ? 0x0E4UL : 0x078UL)
152#define CAP_ENDPTCOMPLETE (hw_bank.lpm ? 0x0E8UL : 0x07CUL)
153#define CAP_ENDPTCTRL (hw_bank.lpm ? 0x0ECUL : 0x080UL)
154#define CAP_LAST (hw_bank.lpm ? 0x12CUL : 0x0C0UL)
155
156/* maximum number of enpoints: valid only after hw_device_reset() */
157static unsigned hw_ep_max;
158
159/**
160 * hw_ep_bit: calculates the bit number
161 * @num: endpoint number
162 * @dir: endpoint direction
163 *
164 * This function returns bit number
165 */
166static inline int hw_ep_bit(int num, int dir)
167{
168 return num + (dir ? 16 : 0);
169}
170
171/**
172 * hw_aread: reads from register bitfield
173 * @addr: address relative to bus map
174 * @mask: bitfield mask
175 *
176 * This function returns register bitfield data
177 */
178static u32 hw_aread(u32 addr, u32 mask)
179{
180 return ioread32(addr + hw_bank.abs) & mask;
181}
182
183/**
184 * hw_awrite: writes to register bitfield
185 * @addr: address relative to bus map
186 * @mask: bitfield mask
187 * @data: new data
188 */
189static void hw_awrite(u32 addr, u32 mask, u32 data)
190{
191 iowrite32(hw_aread(addr, ~mask) | (data & mask),
192 addr + hw_bank.abs);
193}
194
195/**
196 * hw_cread: reads from register bitfield
197 * @addr: address relative to CAP offset plus content
198 * @mask: bitfield mask
199 *
200 * This function returns register bitfield data
201 */
202static u32 hw_cread(u32 addr, u32 mask)
203{
204 return ioread32(addr + hw_bank.cap) & mask;
205}
206
207/**
208 * hw_cwrite: writes to register bitfield
209 * @addr: address relative to CAP offset plus content
210 * @mask: bitfield mask
211 * @data: new data
212 */
213static void hw_cwrite(u32 addr, u32 mask, u32 data)
214{
215 iowrite32(hw_cread(addr, ~mask) | (data & mask),
216 addr + hw_bank.cap);
217}
218
219/**
220 * hw_ctest_and_clear: tests & clears register bitfield
221 * @addr: address relative to CAP offset plus content
222 * @mask: bitfield mask
223 *
224 * This function returns register bitfield data
225 */
226static u32 hw_ctest_and_clear(u32 addr, u32 mask)
227{
228 u32 reg = hw_cread(addr, mask);
229
230 iowrite32(reg, addr + hw_bank.cap);
231 return reg;
232}
233
234/**
235 * hw_ctest_and_write: tests & writes register bitfield
236 * @addr: address relative to CAP offset plus content
237 * @mask: bitfield mask
238 * @data: new data
239 *
240 * This function returns register bitfield data
241 */
242static u32 hw_ctest_and_write(u32 addr, u32 mask, u32 data)
243{
244 u32 reg = hw_cread(addr, ~0);
245
246 iowrite32((reg & ~mask) | (data & mask), addr + hw_bank.cap);
247 return (reg & mask) >> ffs_nr(mask);
248}
249
250/**
251 * hw_device_reset: resets chip (execute without interruption)
252 * @base: register base address
253 *
254 * This function returns an error code
255 */
256static int hw_device_reset(void __iomem *base)
257{
258 u32 reg;
259
260 /* bank is a module variable */
261 hw_bank.abs = base;
262
263 hw_bank.cap = hw_bank.abs;
264 hw_bank.cap += ABS_CAPLENGTH;
265 hw_bank.cap += ioread8(hw_bank.cap);
266
267 reg = hw_aread(ABS_HCCPARAMS, HCCPARAMS_LEN) >> ffs_nr(HCCPARAMS_LEN);
268 hw_bank.lpm = reg;
269 hw_bank.size = hw_bank.cap - hw_bank.abs;
270 hw_bank.size += CAP_LAST;
271 hw_bank.size /= sizeof(u32);
272
273 /* should flush & stop before reset */
274 hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0);
275 hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
276
277 hw_cwrite(CAP_USBCMD, USBCMD_RST, USBCMD_RST);
278 while (hw_cread(CAP_USBCMD, USBCMD_RST))
279 udelay(10); /* not RTOS friendly */
280
281 /* USBMODE should be configured step by step */
282 hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
283 hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
284 hw_cwrite(CAP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); /* HW >= 2.3 */
285
286 if (hw_cread(CAP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
287 pr_err("cannot enter in device mode");
288 pr_err("lpm = %i", hw_bank.lpm);
289 return -ENODEV;
290 }
291
292 reg = hw_aread(ABS_DCCPARAMS, DCCPARAMS_DEN) >> ffs_nr(DCCPARAMS_DEN);
293 if (reg == 0 || reg > ENDPT_MAX)
294 return -ENODEV;
295
296 hw_ep_max = reg; /* cache hw ENDPT_MAX */
297
298 /* setup lock mode ? */
299
300 /* ENDPTSETUPSTAT is '0' by default */
301
302 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
303
304 return 0;
305}
306
307/**
308 * hw_device_state: enables/disables interrupts & starts/stops device (execute
309 * without interruption)
310 * @dma: 0 => disable, !0 => enable and set dma engine
311 *
312 * This function returns an error code
313 */
314static int hw_device_state(u32 dma)
315{
316 if (dma) {
317 hw_cwrite(CAP_ENDPTLISTADDR, ~0, dma);
318 /* interrupt, error, port change, reset, sleep/suspend */
319 hw_cwrite(CAP_USBINTR, ~0,
320 USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
321 hw_cwrite(CAP_USBCMD, USBCMD_RS, USBCMD_RS);
322 } else {
323 hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
324 hw_cwrite(CAP_USBINTR, ~0, 0);
325 }
326 return 0;
327}
328
329/**
330 * hw_ep_flush: flush endpoint fifo (execute without interruption)
331 * @num: endpoint number
332 * @dir: endpoint direction
333 *
334 * This function returns an error code
335 */
336static int hw_ep_flush(int num, int dir)
337{
338 int n = hw_ep_bit(num, dir);
339
340 do {
341 /* flush any pending transfer */
342 hw_cwrite(CAP_ENDPTFLUSH, BIT(n), BIT(n));
343 while (hw_cread(CAP_ENDPTFLUSH, BIT(n)))
344 cpu_relax();
345 } while (hw_cread(CAP_ENDPTSTAT, BIT(n)));
346
347 return 0;
348}
349
350/**
351 * hw_ep_disable: disables endpoint (execute without interruption)
352 * @num: endpoint number
353 * @dir: endpoint direction
354 *
355 * This function returns an error code
356 */
357static int hw_ep_disable(int num, int dir)
358{
359 hw_ep_flush(num, dir);
360 hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32),
361 dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
362 return 0;
363}
364
365/**
366 * hw_ep_enable: enables endpoint (execute without interruption)
367 * @num: endpoint number
368 * @dir: endpoint direction
369 * @type: endpoint type
370 *
371 * This function returns an error code
372 */
373static int hw_ep_enable(int num, int dir, int type)
374{
375 u32 mask, data;
376
377 if (dir) {
378 mask = ENDPTCTRL_TXT; /* type */
379 data = type << ffs_nr(mask);
380
381 mask |= ENDPTCTRL_TXS; /* unstall */
382 mask |= ENDPTCTRL_TXR; /* reset data toggle */
383 data |= ENDPTCTRL_TXR;
384 mask |= ENDPTCTRL_TXE; /* enable */
385 data |= ENDPTCTRL_TXE;
386 } else {
387 mask = ENDPTCTRL_RXT; /* type */
388 data = type << ffs_nr(mask);
389
390 mask |= ENDPTCTRL_RXS; /* unstall */
391 mask |= ENDPTCTRL_RXR; /* reset data toggle */
392 data |= ENDPTCTRL_RXR;
393 mask |= ENDPTCTRL_RXE; /* enable */
394 data |= ENDPTCTRL_RXE;
395 }
396 hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), mask, data);
397 return 0;
398}
399
400/**
401 * hw_ep_get_halt: return endpoint halt status
402 * @num: endpoint number
403 * @dir: endpoint direction
404 *
405 * This function returns 1 if endpoint halted
406 */
407static int hw_ep_get_halt(int num, int dir)
408{
409 u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
410
411 return hw_cread(CAP_ENDPTCTRL + num * sizeof(u32), mask) ? 1 : 0;
412}
413
414/**
415 * hw_ep_is_primed: test if endpoint is primed (execute without interruption)
416 * @num: endpoint number
417 * @dir: endpoint direction
418 *
419 * This function returns true if endpoint primed
420 */
421static int hw_ep_is_primed(int num, int dir)
422{
423 u32 reg = hw_cread(CAP_ENDPTPRIME, ~0) | hw_cread(CAP_ENDPTSTAT, ~0);
424
425 return test_bit(hw_ep_bit(num, dir), (void *)&reg);
426}
427
428/**
429 * hw_test_and_clear_setup_status: test & clear setup status (execute without
430 * interruption)
431 * @n: bit number (endpoint)
432 *
433 * This function returns setup status
434 */
435static int hw_test_and_clear_setup_status(int n)
436{
437 return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
438}
439
440/**
441 * hw_ep_prime: primes endpoint (execute without interruption)
442 * @num: endpoint number
443 * @dir: endpoint direction
444 * @is_ctrl: true if control endpoint
445 *
446 * This function returns an error code
447 */
448static int hw_ep_prime(int num, int dir, int is_ctrl)
449{
450 int n = hw_ep_bit(num, dir);
451
452 /* the caller should flush first */
453 if (hw_ep_is_primed(num, dir))
454 return -EBUSY;
455
456 if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
457 return -EAGAIN;
458
459 hw_cwrite(CAP_ENDPTPRIME, BIT(n), BIT(n));
460
461 while (hw_cread(CAP_ENDPTPRIME, BIT(n)))
462 cpu_relax();
463 if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
464 return -EAGAIN;
465
466 /* status shoult be tested according with manual but it doesn't work */
467 return 0;
468}
469
470/**
471 * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
472 * without interruption)
473 * @num: endpoint number
474 * @dir: endpoint direction
475 * @value: true => stall, false => unstall
476 *
477 * This function returns an error code
478 */
479static int hw_ep_set_halt(int num, int dir, int value)
480{
481 if (value != 0 && value != 1)
482 return -EINVAL;
483
484 do {
485 u32 addr = CAP_ENDPTCTRL + num * sizeof(u32);
486 u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
487 u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
488
489 /* data toggle - reserved for EP0 but it's in ESS */
490 hw_cwrite(addr, mask_xs|mask_xr, value ? mask_xs : mask_xr);
491
492 } while (value != hw_ep_get_halt(num, dir));
493
494 return 0;
495}
496
497/**
498 * hw_intr_clear: disables interrupt & clears interrupt status (execute without
499 * interruption)
500 * @n: interrupt bit
501 *
502 * This function returns an error code
503 */
504static int hw_intr_clear(int n)
505{
506 if (n >= REG_BITS)
507 return -EINVAL;
508
509 hw_cwrite(CAP_USBINTR, BIT(n), 0);
510 hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
511 return 0;
512}
513
514/**
515 * hw_intr_force: enables interrupt & forces interrupt status (execute without
516 * interruption)
517 * @n: interrupt bit
518 *
519 * This function returns an error code
520 */
521static int hw_intr_force(int n)
522{
523 if (n >= REG_BITS)
524 return -EINVAL;
525
526 hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
527 hw_cwrite(CAP_USBINTR, BIT(n), BIT(n));
528 hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
529 hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, 0);
530 return 0;
531}
532
533/**
534 * hw_is_port_high_speed: test if port is high speed
535 *
536 * This function returns true if high speed port
537 */
538static int hw_port_is_high_speed(void)
539{
540 return hw_bank.lpm ? hw_cread(CAP_DEVLC, DEVLC_PSPD) :
541 hw_cread(CAP_PORTSC, PORTSC_HSP);
542}
543
544/**
545 * hw_port_test_get: reads port test mode value
546 *
547 * This function returns port test mode value
548 */
549static u8 hw_port_test_get(void)
550{
551 return hw_cread(CAP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
552}
553
554/**
555 * hw_port_test_set: writes port test mode (execute without interruption)
556 * @mode: new value
557 *
558 * This function returns an error code
559 */
560static int hw_port_test_set(u8 mode)
561{
562 const u8 TEST_MODE_MAX = 7;
563
564 if (mode > TEST_MODE_MAX)
565 return -EINVAL;
566
567 hw_cwrite(CAP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
568 return 0;
569}
570
571/**
572 * hw_read_intr_enable: returns interrupt enable register
573 *
574 * This function returns register data
575 */
576static u32 hw_read_intr_enable(void)
577{
578 return hw_cread(CAP_USBINTR, ~0);
579}
580
581/**
582 * hw_read_intr_status: returns interrupt status register
583 *
584 * This function returns register data
585 */
586static u32 hw_read_intr_status(void)
587{
588 return hw_cread(CAP_USBSTS, ~0);
589}
590
591/**
592 * hw_register_read: reads all device registers (execute without interruption)
593 * @buf: destination buffer
594 * @size: buffer size
595 *
596 * This function returns number of registers read
597 */
598static size_t hw_register_read(u32 *buf, size_t size)
599{
600 unsigned i;
601
602 if (size > hw_bank.size)
603 size = hw_bank.size;
604
605 for (i = 0; i < size; i++)
606 buf[i] = hw_aread(i * sizeof(u32), ~0);
607
608 return size;
609}
610
611/**
612 * hw_register_write: writes to register
613 * @addr: register address
614 * @data: register value
615 *
616 * This function returns an error code
617 */
618static int hw_register_write(u16 addr, u32 data)
619{
620 /* align */
621 addr /= sizeof(u32);
622
623 if (addr >= hw_bank.size)
624 return -EINVAL;
625
626 /* align */
627 addr *= sizeof(u32);
628
629 hw_awrite(addr, ~0, data);
630 return 0;
631}
632
633/**
634 * hw_test_and_clear_complete: test & clear complete status (execute without
635 * interruption)
636 * @n: bit number (endpoint)
637 *
638 * This function returns complete status
639 */
640static int hw_test_and_clear_complete(int n)
641{
642 return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
643}
644
645/**
646 * hw_test_and_clear_intr_active: test & clear active interrupts (execute
647 * without interruption)
648 *
649 * This function returns active interrutps
650 */
651static u32 hw_test_and_clear_intr_active(void)
652{
653 u32 reg = hw_read_intr_status() & hw_read_intr_enable();
654
655 hw_cwrite(CAP_USBSTS, ~0, reg);
656 return reg;
657}
658
659/**
660 * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
661 * interruption)
662 *
663 * This function returns guard value
664 */
665static int hw_test_and_clear_setup_guard(void)
666{
667 return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, 0);
668}
669
670/**
671 * hw_test_and_set_setup_guard: test & set setup guard (execute without
672 * interruption)
673 *
674 * This function returns guard value
675 */
676static int hw_test_and_set_setup_guard(void)
677{
678 return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
679}
680
681/**
682 * hw_usb_set_address: configures USB address (execute without interruption)
683 * @value: new USB address
684 *
685 * This function returns an error code
686 */
687static int hw_usb_set_address(u8 value)
688{
689 /* advance */
690 hw_cwrite(CAP_DEVICEADDR, DEVICEADDR_USBADR | DEVICEADDR_USBADRA,
691 value << ffs_nr(DEVICEADDR_USBADR) | DEVICEADDR_USBADRA);
692 return 0;
693}
694
695/**
696 * hw_usb_reset: restart device after a bus reset (execute without
697 * interruption)
698 *
699 * This function returns an error code
700 */
701static int hw_usb_reset(void)
702{
703 hw_usb_set_address(0);
704
705 /* ESS flushes only at end?!? */
706 hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0); /* flush all EPs */
707
708 /* clear setup token semaphores */
709 hw_cwrite(CAP_ENDPTSETUPSTAT, 0, 0); /* writes its content */
710
711 /* clear complete status */
712 hw_cwrite(CAP_ENDPTCOMPLETE, 0, 0); /* writes its content */
713
714 /* wait until all bits cleared */
715 while (hw_cread(CAP_ENDPTPRIME, ~0))
716 udelay(10); /* not RTOS friendly */
717
718 /* reset all endpoints ? */
719
720 /* reset internal status and wait for further instructions
721 no need to verify the port reset status (ESS does it) */
722
723 return 0;
724}
725
726/******************************************************************************
727 * DBG block
728 *****************************************************************************/
729/**
730 * show_device: prints information about device capabilities and status
731 *
732 * Check "device.h" for details
733 */
734static ssize_t show_device(struct device *dev, struct device_attribute *attr,
735 char *buf)
736{
737 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
738 struct usb_gadget *gadget = &udc->gadget;
739 int n = 0;
740
741 dbg_trace("[%s] %p\n", __func__, buf);
742 if (attr == NULL || buf == NULL) {
743 dev_err(dev, "[%s] EINVAL\n", __func__);
744 return 0;
745 }
746
747 n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
748 gadget->speed);
749 n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
750 gadget->is_dualspeed);
751 n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
752 gadget->is_otg);
753 n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
754 gadget->is_a_peripheral);
755 n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
756 gadget->b_hnp_enable);
757 n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
758 gadget->a_hnp_support);
759 n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
760 gadget->a_alt_hnp_support);
761 n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
762 (gadget->name ? gadget->name : ""));
763
764 return n;
765}
766static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
767
768/**
769 * show_driver: prints information about attached gadget (if any)
770 *
771 * Check "device.h" for details
772 */
773static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
774 char *buf)
775{
776 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
777 struct usb_gadget_driver *driver = udc->driver;
778 int n = 0;
779
780 dbg_trace("[%s] %p\n", __func__, buf);
781 if (attr == NULL || buf == NULL) {
782 dev_err(dev, "[%s] EINVAL\n", __func__);
783 return 0;
784 }
785
786 if (driver == NULL)
787 return scnprintf(buf, PAGE_SIZE,
788 "There is no gadget attached!\n");
789
790 n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
791 (driver->function ? driver->function : ""));
792 n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
793 driver->speed);
794
795 return n;
796}
797static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
798
799/* Maximum event message length */
800#define DBG_DATA_MSG 64UL
801
802/* Maximum event messages */
803#define DBG_DATA_MAX 128UL
804
805/* Event buffer descriptor */
806static struct {
807 char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
808 unsigned idx; /* index */
809 unsigned tty; /* print to console? */
810 rwlock_t lck; /* lock */
811} dbg_data = {
812 .idx = 0,
813 .tty = 0,
814 .lck = __RW_LOCK_UNLOCKED(lck)
815};
816
817/**
818 * dbg_dec: decrements debug event index
819 * @idx: buffer index
820 */
821static void dbg_dec(unsigned *idx)
822{
823 *idx = (*idx - 1) & (DBG_DATA_MAX-1);
824}
825
826/**
827 * dbg_inc: increments debug event index
828 * @idx: buffer index
829 */
830static void dbg_inc(unsigned *idx)
831{
832 *idx = (*idx + 1) & (DBG_DATA_MAX-1);
833}
834
835/**
836 * dbg_print: prints the common part of the event
837 * @addr: endpoint address
838 * @name: event name
839 * @status: status
840 * @extra: extra information
841 */
842static void dbg_print(u8 addr, const char *name, int status, const char *extra)
843{
844 struct timeval tval;
845 unsigned int stamp;
846 unsigned long flags;
847
848 write_lock_irqsave(&dbg_data.lck, flags);
849
850 do_gettimeofday(&tval);
851 stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
852 stamp = stamp * 1000000 + tval.tv_usec;
853
854 scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
855 "%04X\t» %02X %-7.7s %4i «\t%s\n",
856 stamp, addr, name, status, extra);
857
858 dbg_inc(&dbg_data.idx);
859
860 write_unlock_irqrestore(&dbg_data.lck, flags);
861
862 if (dbg_data.tty != 0)
863 pr_notice("%04X\t» %02X %-7.7s %4i «\t%s\n",
864 stamp, addr, name, status, extra);
865}
866
867/**
868 * dbg_done: prints a DONE event
869 * @addr: endpoint address
870 * @td: transfer descriptor
871 * @status: status
872 */
873static void dbg_done(u8 addr, const u32 token, int status)
874{
875 char msg[DBG_DATA_MSG];
876
877 scnprintf(msg, sizeof(msg), "%d %02X",
878 (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
879 (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
880 dbg_print(addr, "DONE", status, msg);
881}
882
883/**
884 * dbg_event: prints a generic event
885 * @addr: endpoint address
886 * @name: event name
887 * @status: status
888 */
889static void dbg_event(u8 addr, const char *name, int status)
890{
891 if (name != NULL)
892 dbg_print(addr, name, status, "");
893}
894
895/*
896 * dbg_queue: prints a QUEUE event
897 * @addr: endpoint address
898 * @req: USB request
899 * @status: status
900 */
901static void dbg_queue(u8 addr, const struct usb_request *req, int status)
902{
903 char msg[DBG_DATA_MSG];
904
905 if (req != NULL) {
906 scnprintf(msg, sizeof(msg),
907 "%d %d", !req->no_interrupt, req->length);
908 dbg_print(addr, "QUEUE", status, msg);
909 }
910}
911
912/**
913 * dbg_setup: prints a SETUP event
914 * @addr: endpoint address
915 * @req: setup request
916 */
917static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
918{
919 char msg[DBG_DATA_MSG];
920
921 if (req != NULL) {
922 scnprintf(msg, sizeof(msg),
923 "%02X %02X %04X %04X %d", req->bRequestType,
924 req->bRequest, le16_to_cpu(req->wValue),
925 le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
926 dbg_print(addr, "SETUP", 0, msg);
927 }
928}
929
930/**
931 * show_events: displays the event buffer
932 *
933 * Check "device.h" for details
934 */
935static ssize_t show_events(struct device *dev, struct device_attribute *attr,
936 char *buf)
937{
938 unsigned long flags;
939 unsigned i, j, n = 0;
940
941 dbg_trace("[%s] %p\n", __func__, buf);
942 if (attr == NULL || buf == NULL) {
943 dev_err(dev, "[%s] EINVAL\n", __func__);
944 return 0;
945 }
946
947 read_lock_irqsave(&dbg_data.lck, flags);
948
949 i = dbg_data.idx;
950 for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
951 n += strlen(dbg_data.buf[i]);
952 if (n >= PAGE_SIZE) {
953 n -= strlen(dbg_data.buf[i]);
954 break;
955 }
956 }
957 for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
958 j += scnprintf(buf + j, PAGE_SIZE - j,
959 "%s", dbg_data.buf[i]);
960
961 read_unlock_irqrestore(&dbg_data.lck, flags);
962
963 return n;
964}
965
966/**
967 * store_events: configure if events are going to be also printed to console
968 *
969 * Check "device.h" for details
970 */
971static ssize_t store_events(struct device *dev, struct device_attribute *attr,
972 const char *buf, size_t count)
973{
974 unsigned tty;
975
976 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
977 if (attr == NULL || buf == NULL) {
978 dev_err(dev, "[%s] EINVAL\n", __func__);
979 goto done;
980 }
981
982 if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
983 dev_err(dev, "<1|0>: enable|disable console log\n");
984 goto done;
985 }
986
987 dbg_data.tty = tty;
988 dev_info(dev, "tty = %u", dbg_data.tty);
989
990 done:
991 return count;
992}
993static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
994
995/**
996 * show_inters: interrupt status, enable status and historic
997 *
998 * Check "device.h" for details
999 */
1000static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
1001 char *buf)
1002{
1003 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1004 unsigned long flags;
1005 u32 intr;
1006 unsigned i, j, n = 0;
1007
1008 dbg_trace("[%s] %p\n", __func__, buf);
1009 if (attr == NULL || buf == NULL) {
1010 dev_err(dev, "[%s] EINVAL\n", __func__);
1011 return 0;
1012 }
1013
1014 spin_lock_irqsave(udc->lock, flags);
1015
1016 n += scnprintf(buf + n, PAGE_SIZE - n,
1017 "status = %08x\n", hw_read_intr_status());
1018 n += scnprintf(buf + n, PAGE_SIZE - n,
1019 "enable = %08x\n", hw_read_intr_enable());
1020
1021 n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
1022 isr_statistics.test);
1023 n += scnprintf(buf + n, PAGE_SIZE - n, "» ui = %d\n",
1024 isr_statistics.ui);
1025 n += scnprintf(buf + n, PAGE_SIZE - n, "» uei = %d\n",
1026 isr_statistics.uei);
1027 n += scnprintf(buf + n, PAGE_SIZE - n, "» pci = %d\n",
1028 isr_statistics.pci);
1029 n += scnprintf(buf + n, PAGE_SIZE - n, "» uri = %d\n",
1030 isr_statistics.uri);
1031 n += scnprintf(buf + n, PAGE_SIZE - n, "» sli = %d\n",
1032 isr_statistics.sli);
1033 n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
1034 isr_statistics.none);
1035 n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
1036 isr_statistics.hndl.cnt);
1037
1038 for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
1039 i &= ISR_MASK;
1040 intr = isr_statistics.hndl.buf[i];
1041
1042 if (USBi_UI & intr)
1043 n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
1044 intr &= ~USBi_UI;
1045 if (USBi_UEI & intr)
1046 n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
1047 intr &= ~USBi_UEI;
1048 if (USBi_PCI & intr)
1049 n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
1050 intr &= ~USBi_PCI;
1051 if (USBi_URI & intr)
1052 n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
1053 intr &= ~USBi_URI;
1054 if (USBi_SLI & intr)
1055 n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
1056 intr &= ~USBi_SLI;
1057 if (intr)
1058 n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
1059 if (isr_statistics.hndl.buf[i])
1060 n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
1061 }
1062
1063 spin_unlock_irqrestore(udc->lock, flags);
1064
1065 return n;
1066}
1067
1068/**
1069 * store_inters: enable & force or disable an individual interrutps
1070 * (to be used for test purposes only)
1071 *
1072 * Check "device.h" for details
1073 */
1074static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
1075 const char *buf, size_t count)
1076{
1077 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1078 unsigned long flags;
1079 unsigned en, bit;
1080
1081 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1082 if (attr == NULL || buf == NULL) {
1083 dev_err(dev, "[%s] EINVAL\n", __func__);
1084 goto done;
1085 }
1086
1087 if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
1088 dev_err(dev, "<1|0> <bit>: enable|disable interrupt");
1089 goto done;
1090 }
1091
1092 spin_lock_irqsave(udc->lock, flags);
1093 if (en) {
1094 if (hw_intr_force(bit))
1095 dev_err(dev, "invalid bit number\n");
1096 else
1097 isr_statistics.test++;
1098 } else {
1099 if (hw_intr_clear(bit))
1100 dev_err(dev, "invalid bit number\n");
1101 }
1102 spin_unlock_irqrestore(udc->lock, flags);
1103
1104 done:
1105 return count;
1106}
1107static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
1108
1109/**
1110 * show_port_test: reads port test mode
1111 *
1112 * Check "device.h" for details
1113 */
1114static ssize_t show_port_test(struct device *dev,
1115 struct device_attribute *attr, char *buf)
1116{
1117 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1118 unsigned long flags;
1119 unsigned mode;
1120
1121 dbg_trace("[%s] %p\n", __func__, buf);
1122 if (attr == NULL || buf == NULL) {
1123 dev_err(dev, "[%s] EINVAL\n", __func__);
1124 return 0;
1125 }
1126
1127 spin_lock_irqsave(udc->lock, flags);
1128 mode = hw_port_test_get();
1129 spin_unlock_irqrestore(udc->lock, flags);
1130
1131 return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
1132}
1133
1134/**
1135 * store_port_test: writes port test mode
1136 *
1137 * Check "device.h" for details
1138 */
1139static ssize_t store_port_test(struct device *dev,
1140 struct device_attribute *attr,
1141 const char *buf, size_t count)
1142{
1143 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1144 unsigned long flags;
1145 unsigned mode;
1146
1147 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1148 if (attr == NULL || buf == NULL) {
1149 dev_err(dev, "[%s] EINVAL\n", __func__);
1150 goto done;
1151 }
1152
1153 if (sscanf(buf, "%u", &mode) != 1) {
1154 dev_err(dev, "<mode>: set port test mode");
1155 goto done;
1156 }
1157
1158 spin_lock_irqsave(udc->lock, flags);
1159 if (hw_port_test_set(mode))
1160 dev_err(dev, "invalid mode\n");
1161 spin_unlock_irqrestore(udc->lock, flags);
1162
1163 done:
1164 return count;
1165}
1166static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
1167 show_port_test, store_port_test);
1168
1169/**
1170 * show_qheads: DMA contents of all queue heads
1171 *
1172 * Check "device.h" for details
1173 */
1174static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
1175 char *buf)
1176{
1177 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1178 unsigned long flags;
1179 unsigned i, j, n = 0;
1180
1181 dbg_trace("[%s] %p\n", __func__, buf);
1182 if (attr == NULL || buf == NULL) {
1183 dev_err(dev, "[%s] EINVAL\n", __func__);
1184 return 0;
1185 }
1186
1187 spin_lock_irqsave(udc->lock, flags);
1188 for (i = 0; i < hw_ep_max; i++) {
1189 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
1190 n += scnprintf(buf + n, PAGE_SIZE - n,
1191 "EP=%02i: RX=%08X TX=%08X\n",
1192 i, (u32)mEp->qh[RX].dma, (u32)mEp->qh[TX].dma);
1193 for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
1194 n += scnprintf(buf + n, PAGE_SIZE - n,
1195 " %04X: %08X %08X\n", j,
1196 *((u32 *)mEp->qh[RX].ptr + j),
1197 *((u32 *)mEp->qh[TX].ptr + j));
1198 }
1199 }
1200 spin_unlock_irqrestore(udc->lock, flags);
1201
1202 return n;
1203}
1204static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
1205
1206/**
1207 * show_registers: dumps all registers
1208 *
1209 * Check "device.h" for details
1210 */
1211static ssize_t show_registers(struct device *dev,
1212 struct device_attribute *attr, char *buf)
1213{
1214 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1215 unsigned long flags;
1216 u32 dump[512];
1217 unsigned i, k, n = 0;
1218
1219 dbg_trace("[%s] %p\n", __func__, buf);
1220 if (attr == NULL || buf == NULL) {
1221 dev_err(dev, "[%s] EINVAL\n", __func__);
1222 return 0;
1223 }
1224
1225 spin_lock_irqsave(udc->lock, flags);
1226 k = hw_register_read(dump, sizeof(dump)/sizeof(u32));
1227 spin_unlock_irqrestore(udc->lock, flags);
1228
1229 for (i = 0; i < k; i++) {
1230 n += scnprintf(buf + n, PAGE_SIZE - n,
1231 "reg[0x%04X] = 0x%08X\n",
1232 i * (unsigned)sizeof(u32), dump[i]);
1233 }
1234
1235 return n;
1236}
1237
1238/**
1239 * store_registers: writes value to register address
1240 *
1241 * Check "device.h" for details
1242 */
1243static ssize_t store_registers(struct device *dev,
1244 struct device_attribute *attr,
1245 const char *buf, size_t count)
1246{
1247 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1248 unsigned long addr, data, flags;
1249
1250 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1251 if (attr == NULL || buf == NULL) {
1252 dev_err(dev, "[%s] EINVAL\n", __func__);
1253 goto done;
1254 }
1255
1256 if (sscanf(buf, "%li %li", &addr, &data) != 2) {
1257 dev_err(dev, "<addr> <data>: write data to register address");
1258 goto done;
1259 }
1260
1261 spin_lock_irqsave(udc->lock, flags);
1262 if (hw_register_write(addr, data))
1263 dev_err(dev, "invalid address range\n");
1264 spin_unlock_irqrestore(udc->lock, flags);
1265
1266 done:
1267 return count;
1268}
1269static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
1270 show_registers, store_registers);
1271
1272/**
1273 * show_requests: DMA contents of all requests currently queued (all endpts)
1274 *
1275 * Check "device.h" for details
1276 */
1277static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
1278 char *buf)
1279{
1280 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1281 unsigned long flags;
1282 struct list_head *ptr = NULL;
1283 struct ci13xxx_req *req = NULL;
1284 unsigned i, j, k, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
1285
1286 dbg_trace("[%s] %p\n", __func__, buf);
1287 if (attr == NULL || buf == NULL) {
1288 dev_err(dev, "[%s] EINVAL\n", __func__);
1289 return 0;
1290 }
1291
1292 spin_lock_irqsave(udc->lock, flags);
1293 for (i = 0; i < hw_ep_max; i++)
1294 for (k = RX; k <= TX; k++)
1295 list_for_each(ptr, &udc->ci13xxx_ep[i].qh[k].queue)
1296 {
1297 req = list_entry(ptr,
1298 struct ci13xxx_req, queue);
1299
1300 n += scnprintf(buf + n, PAGE_SIZE - n,
1301 "EP=%02i: TD=%08X %s\n",
1302 i, (u32)req->dma,
1303 ((k == RX) ? "RX" : "TX"));
1304
1305 for (j = 0; j < qSize; j++)
1306 n += scnprintf(buf + n, PAGE_SIZE - n,
1307 " %04X: %08X\n", j,
1308 *((u32 *)req->ptr + j));
1309 }
1310 spin_unlock_irqrestore(udc->lock, flags);
1311
1312 return n;
1313}
1314static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
1315
1316/**
1317 * dbg_create_files: initializes the attribute interface
1318 * @dev: device
1319 *
1320 * This function returns an error code
1321 */
1322__maybe_unused static int dbg_create_files(struct device *dev)
1323{
1324 int retval = 0;
1325
1326 if (dev == NULL)
1327 return -EINVAL;
1328 retval = device_create_file(dev, &dev_attr_device);
1329 if (retval)
1330 goto done;
1331 retval = device_create_file(dev, &dev_attr_driver);
1332 if (retval)
1333 goto rm_device;
1334 retval = device_create_file(dev, &dev_attr_events);
1335 if (retval)
1336 goto rm_driver;
1337 retval = device_create_file(dev, &dev_attr_inters);
1338 if (retval)
1339 goto rm_events;
1340 retval = device_create_file(dev, &dev_attr_port_test);
1341 if (retval)
1342 goto rm_inters;
1343 retval = device_create_file(dev, &dev_attr_qheads);
1344 if (retval)
1345 goto rm_port_test;
1346 retval = device_create_file(dev, &dev_attr_registers);
1347 if (retval)
1348 goto rm_qheads;
1349 retval = device_create_file(dev, &dev_attr_requests);
1350 if (retval)
1351 goto rm_registers;
1352 return 0;
1353
1354 rm_registers:
1355 device_remove_file(dev, &dev_attr_registers);
1356 rm_qheads:
1357 device_remove_file(dev, &dev_attr_qheads);
1358 rm_port_test:
1359 device_remove_file(dev, &dev_attr_port_test);
1360 rm_inters:
1361 device_remove_file(dev, &dev_attr_inters);
1362 rm_events:
1363 device_remove_file(dev, &dev_attr_events);
1364 rm_driver:
1365 device_remove_file(dev, &dev_attr_driver);
1366 rm_device:
1367 device_remove_file(dev, &dev_attr_device);
1368 done:
1369 return retval;
1370}
1371
1372/**
1373 * dbg_remove_files: destroys the attribute interface
1374 * @dev: device
1375 *
1376 * This function returns an error code
1377 */
1378__maybe_unused static int dbg_remove_files(struct device *dev)
1379{
1380 if (dev == NULL)
1381 return -EINVAL;
1382 device_remove_file(dev, &dev_attr_requests);
1383 device_remove_file(dev, &dev_attr_registers);
1384 device_remove_file(dev, &dev_attr_qheads);
1385 device_remove_file(dev, &dev_attr_port_test);
1386 device_remove_file(dev, &dev_attr_inters);
1387 device_remove_file(dev, &dev_attr_events);
1388 device_remove_file(dev, &dev_attr_driver);
1389 device_remove_file(dev, &dev_attr_device);
1390 return 0;
1391}
1392
1393/******************************************************************************
1394 * UTIL block
1395 *****************************************************************************/
1396/**
1397 * _usb_addr: calculates endpoint address from direction & number
1398 * @ep: endpoint
1399 */
1400static inline u8 _usb_addr(struct ci13xxx_ep *ep)
1401{
1402 return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
1403}
1404
1405/**
1406 * _hardware_queue: configures a request at hardware level
1407 * @gadget: gadget
1408 * @mEp: endpoint
1409 *
1410 * This function returns an error code
1411 */
1412static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
1413{
1414 unsigned i;
1415
1416 trace("%p, %p", mEp, mReq);
1417
1418 /* don't queue twice */
1419 if (mReq->req.status == -EALREADY)
1420 return -EALREADY;
1421
1422 if (hw_ep_is_primed(mEp->num, mEp->dir))
1423 return -EBUSY;
1424
1425 mReq->req.status = -EALREADY;
1426
1427 if (mReq->req.length && !mReq->req.dma) {
1428 mReq->req.dma = \
1429 dma_map_single(mEp->device, mReq->req.buf,
1430 mReq->req.length, mEp->dir ?
1431 DMA_TO_DEVICE : DMA_FROM_DEVICE);
1432 if (mReq->req.dma == 0)
1433 return -ENOMEM;
1434
1435 mReq->map = 1;
1436 }
1437
1438 /*
1439 * TD configuration
1440 * TODO - handle requests which spawns into several TDs
1441 */
1442 memset(mReq->ptr, 0, sizeof(*mReq->ptr));
1443 mReq->ptr->next |= TD_TERMINATE;
1444 mReq->ptr->token = mReq->req.length << ffs_nr(TD_TOTAL_BYTES);
1445 mReq->ptr->token &= TD_TOTAL_BYTES;
1446 mReq->ptr->token |= TD_IOC;
1447 mReq->ptr->token |= TD_STATUS_ACTIVE;
1448 mReq->ptr->page[0] = mReq->req.dma;
1449 for (i = 1; i < 5; i++)
1450 mReq->ptr->page[i] =
1451 (mReq->req.dma + i * PAGE_SIZE) & ~TD_RESERVED_MASK;
1452
1453 /*
1454 * QH configuration
1455 * At this point it's guaranteed exclusive access to qhead
1456 * (endpt is not primed) so it's no need to use tripwire
1457 */
1458 mEp->qh[mEp->dir].ptr->td.next = mReq->dma; /* TERMINATE = 0 */
1459 mEp->qh[mEp->dir].ptr->td.token &= ~TD_STATUS; /* clear status */
1460 if (mReq->req.zero == 0)
1461 mEp->qh[mEp->dir].ptr->cap |= QH_ZLT;
1462 else
1463 mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
1464
1465 wmb(); /* synchronize before ep prime */
1466
1467 return hw_ep_prime(mEp->num, mEp->dir,
1468 mEp->type == USB_ENDPOINT_XFER_CONTROL);
1469}
1470
1471/**
1472 * _hardware_dequeue: handles a request at hardware level
1473 * @gadget: gadget
1474 * @mEp: endpoint
1475 *
1476 * This function returns an error code
1477 */
1478static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
1479{
1480 trace("%p, %p", mEp, mReq);
1481
1482 if (mReq->req.status != -EALREADY)
1483 return -EINVAL;
1484
1485 if (hw_ep_is_primed(mEp->num, mEp->dir))
1486 hw_ep_flush(mEp->num, mEp->dir);
1487
1488 mReq->req.status = 0;
1489
1490 if (mReq->map) {
1491 dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
1492 mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1493 mReq->req.dma = 0;
1494 mReq->map = 0;
1495 }
1496
1497 mReq->req.status = mReq->ptr->token & TD_STATUS;
1498 if ((TD_STATUS_ACTIVE & mReq->req.status) != 0)
1499 mReq->req.status = -ECONNRESET;
1500 else if ((TD_STATUS_HALTED & mReq->req.status) != 0)
1501 mReq->req.status = -1;
1502 else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
1503 mReq->req.status = -1;
1504 else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
1505 mReq->req.status = -1;
1506
1507 mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
1508 mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
1509 mReq->req.actual = mReq->req.length - mReq->req.actual;
1510 mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
1511
1512 return mReq->req.actual;
1513}
1514
1515/**
1516 * _ep_nuke: dequeues all endpoint requests
1517 * @mEp: endpoint
1518 *
1519 * This function returns an error code
1520 * Caller must hold lock
1521 */
1522static int _ep_nuke(struct ci13xxx_ep *mEp)
1523__releases(mEp->lock)
1524__acquires(mEp->lock)
1525{
1526 trace("%p", mEp);
1527
1528 if (mEp == NULL)
1529 return -EINVAL;
1530
1531 hw_ep_flush(mEp->num, mEp->dir);
1532
1533 while (!list_empty(&mEp->qh[mEp->dir].queue)) {
1534
1535 /* pop oldest request */
1536 struct ci13xxx_req *mReq = \
1537 list_entry(mEp->qh[mEp->dir].queue.next,
1538 struct ci13xxx_req, queue);
1539 list_del_init(&mReq->queue);
1540 mReq->req.status = -ESHUTDOWN;
1541
1542 if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
1543 spin_unlock(mEp->lock);
1544 mReq->req.complete(&mEp->ep, &mReq->req);
1545 spin_lock(mEp->lock);
1546 }
1547 }
1548 return 0;
1549}
1550
1551/**
1552 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
1553 * @gadget: gadget
1554 *
1555 * This function returns an error code
1556 * Caller must hold lock
1557 */
1558static int _gadget_stop_activity(struct usb_gadget *gadget)
1559__releases(udc->lock)
1560__acquires(udc->lock)
1561{
1562 struct usb_ep *ep;
1563 struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
1564 struct ci13xxx_ep *mEp = container_of(gadget->ep0,
1565 struct ci13xxx_ep, ep);
1566
1567 trace("%p", gadget);
1568
1569 if (gadget == NULL)
1570 return -EINVAL;
1571
1572 spin_unlock(udc->lock);
1573
1574 /* flush all endpoints */
1575 gadget_for_each_ep(ep, gadget) {
1576 usb_ep_fifo_flush(ep);
1577 }
1578 usb_ep_fifo_flush(gadget->ep0);
1579
1580 udc->driver->disconnect(gadget);
1581
1582 /* make sure to disable all endpoints */
1583 gadget_for_each_ep(ep, gadget) {
1584 usb_ep_disable(ep);
1585 }
1586 usb_ep_disable(gadget->ep0);
1587
1588 if (mEp->status != NULL) {
1589 usb_ep_free_request(gadget->ep0, mEp->status);
1590 mEp->status = NULL;
1591 }
1592
1593 spin_lock(udc->lock);
1594
1595 return 0;
1596}
1597
1598/******************************************************************************
1599 * ISR block
1600 *****************************************************************************/
1601/**
1602 * isr_reset_handler: USB reset interrupt handler
1603 * @udc: UDC device
1604 *
1605 * This function resets USB engine after a bus reset occurred
1606 */
1607static void isr_reset_handler(struct ci13xxx *udc)
1608__releases(udc->lock)
1609__acquires(udc->lock)
1610{
1611 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[0];
1612 int retval;
1613
1614 trace("%p", udc);
1615
1616 if (udc == NULL) {
1617 err("EINVAL");
1618 return;
1619 }
1620
1621 dbg_event(0xFF, "BUS RST", 0);
1622
1623 retval = _gadget_stop_activity(&udc->gadget);
1624 if (retval)
1625 goto done;
1626
1627 retval = hw_usb_reset();
1628 if (retval)
1629 goto done;
1630
1631 spin_unlock(udc->lock);
1632 retval = usb_ep_enable(&mEp->ep, &ctrl_endpt_desc);
1633 if (!retval) {
1634 mEp->status = usb_ep_alloc_request(&mEp->ep, GFP_KERNEL);
1635 if (mEp->status == NULL) {
1636 usb_ep_disable(&mEp->ep);
1637 retval = -ENOMEM;
1638 }
1639 }
1640 spin_lock(udc->lock);
1641
1642 done:
1643 if (retval)
1644 err("error: %i", retval);
1645}
1646
1647/**
1648 * isr_get_status_complete: get_status request complete function
1649 * @ep: endpoint
1650 * @req: request handled
1651 *
1652 * Caller must release lock
1653 */
1654static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
1655{
1656 trace("%p, %p", ep, req);
1657
1658 if (ep == NULL || req == NULL) {
1659 err("EINVAL");
1660 return;
1661 }
1662
1663 kfree(req->buf);
1664 usb_ep_free_request(ep, req);
1665}
1666
1667/**
1668 * isr_get_status_response: get_status request response
1669 * @ep: endpoint
1670 * @setup: setup request packet
1671 *
1672 * This function returns an error code
1673 */
1674static int isr_get_status_response(struct ci13xxx_ep *mEp,
1675 struct usb_ctrlrequest *setup)
1676__releases(mEp->lock)
1677__acquires(mEp->lock)
1678{
1679 struct usb_request *req = NULL;
1680 gfp_t gfp_flags = GFP_ATOMIC;
1681 int dir, num, retval;
1682
1683 trace("%p, %p", mEp, setup);
1684
1685 if (mEp == NULL || setup == NULL)
1686 return -EINVAL;
1687
1688 spin_unlock(mEp->lock);
1689 req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
1690 spin_lock(mEp->lock);
1691 if (req == NULL)
1692 return -ENOMEM;
1693
1694 req->complete = isr_get_status_complete;
1695 req->length = 2;
1696 req->buf = kzalloc(req->length, gfp_flags);
1697 if (req->buf == NULL) {
1698 retval = -ENOMEM;
1699 goto err_free_req;
1700 }
1701
1702 if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1703 /* TODO: D1 - Remote Wakeup; D0 - Self Powered */
1704 retval = 0;
1705 } else if ((setup->bRequestType & USB_RECIP_MASK) \
1706 == USB_RECIP_ENDPOINT) {
1707 dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
1708 TX : RX;
1709 num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1710 *((u16 *)req->buf) = hw_ep_get_halt(num, dir);
1711 }
1712 /* else do nothing; reserved for future use */
1713
1714 spin_unlock(mEp->lock);
1715 retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
1716 spin_lock(mEp->lock);
1717 if (retval)
1718 goto err_free_buf;
1719
1720 return 0;
1721
1722 err_free_buf:
1723 kfree(req->buf);
1724 err_free_req:
1725 spin_unlock(mEp->lock);
1726 usb_ep_free_request(&mEp->ep, req);
1727 spin_lock(mEp->lock);
1728 return retval;
1729}
1730
1731/**
1732 * isr_setup_status_phase: queues the status phase of a setup transation
1733 * @mEp: endpoint
1734 *
1735 * This function returns an error code
1736 */
1737static int isr_setup_status_phase(struct ci13xxx_ep *mEp)
1738__releases(mEp->lock)
1739__acquires(mEp->lock)
1740{
1741 int retval;
1742
1743 trace("%p", mEp);
1744
1745 /* mEp is always valid & configured */
1746
1747 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1748 mEp->dir = (mEp->dir == TX) ? RX : TX;
1749
1750 mEp->status->no_interrupt = 1;
1751
1752 spin_unlock(mEp->lock);
1753 retval = usb_ep_queue(&mEp->ep, mEp->status, GFP_ATOMIC);
1754 spin_lock(mEp->lock);
1755
1756 return retval;
1757}
1758
1759/**
1760 * isr_tr_complete_low: transaction complete low level handler
1761 * @mEp: endpoint
1762 *
1763 * This function returns an error code
1764 * Caller must hold lock
1765 */
1766static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
1767__releases(mEp->lock)
1768__acquires(mEp->lock)
1769{
1770 struct ci13xxx_req *mReq;
1771 int retval;
1772
1773 trace("%p", mEp);
1774
1775 if (list_empty(&mEp->qh[mEp->dir].queue))
1776 return -EINVAL;
1777
1778 /* pop oldest request */
1779 mReq = list_entry(mEp->qh[mEp->dir].queue.next,
1780 struct ci13xxx_req, queue);
1781 list_del_init(&mReq->queue);
1782
1783 retval = _hardware_dequeue(mEp, mReq);
1784 if (retval < 0) {
1785 dbg_event(_usb_addr(mEp), "DONE", retval);
1786 goto done;
1787 }
1788
1789 dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
1790
1791 if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
1792 spin_unlock(mEp->lock);
1793 mReq->req.complete(&mEp->ep, &mReq->req);
1794 spin_lock(mEp->lock);
1795 }
1796
1797 if (!list_empty(&mEp->qh[mEp->dir].queue)) {
1798 mReq = list_entry(mEp->qh[mEp->dir].queue.next,
1799 struct ci13xxx_req, queue);
1800 _hardware_enqueue(mEp, mReq);
1801 }
1802
1803 done:
1804 return retval;
1805}
1806
1807/**
1808 * isr_tr_complete_handler: transaction complete interrupt handler
1809 * @udc: UDC descriptor
1810 *
1811 * This function handles traffic events
1812 */
1813static void isr_tr_complete_handler(struct ci13xxx *udc)
1814__releases(udc->lock)
1815__acquires(udc->lock)
1816{
1817 unsigned i;
1818
1819 trace("%p", udc);
1820
1821 if (udc == NULL) {
1822 err("EINVAL");
1823 return;
1824 }
1825
1826 for (i = 0; i < hw_ep_max; i++) {
1827 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
1828 int type, num, err = -EINVAL;
1829 struct usb_ctrlrequest req;
1830
1831
1832 if (mEp->desc == NULL)
1833 continue; /* not configured */
1834
1835 if ((mEp->dir == RX && hw_test_and_clear_complete(i)) ||
1836 (mEp->dir == TX && hw_test_and_clear_complete(i + 16))) {
1837 err = isr_tr_complete_low(mEp);
1838 if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
1839 if (err > 0) /* needs status phase */
1840 err = isr_setup_status_phase(mEp);
1841 if (err < 0) {
1842 dbg_event(_usb_addr(mEp),
1843 "ERROR", err);
1844 spin_unlock(udc->lock);
1845 if (usb_ep_set_halt(&mEp->ep))
1846 err("error: ep_set_halt");
1847 spin_lock(udc->lock);
1848 }
1849 }
1850 }
1851
1852 if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
1853 !hw_test_and_clear_setup_status(i))
1854 continue;
1855
1856 if (i != 0) {
1857 warn("ctrl traffic received at endpoint");
1858 continue;
1859 }
1860
1861 /* read_setup_packet */
1862 do {
1863 hw_test_and_set_setup_guard();
1864 memcpy(&req, &mEp->qh[RX].ptr->setup, sizeof(req));
1865 } while (!hw_test_and_clear_setup_guard());
1866
1867 type = req.bRequestType;
1868
1869 mEp->dir = (type & USB_DIR_IN) ? TX : RX;
1870
1871 dbg_setup(_usb_addr(mEp), &req);
1872
1873 switch (req.bRequest) {
1874 case USB_REQ_CLEAR_FEATURE:
1875 if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1876 le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
1877 goto delegate;
1878 if (req.wLength != 0)
1879 break;
1880 num = le16_to_cpu(req.wIndex);
1881 num &= USB_ENDPOINT_NUMBER_MASK;
1882 if (!udc->ci13xxx_ep[num].wedge) {
1883 spin_unlock(udc->lock);
1884 err = usb_ep_clear_halt(
1885 &udc->ci13xxx_ep[num].ep);
1886 spin_lock(udc->lock);
1887 if (err)
1888 break;
1889 }
1890 err = isr_setup_status_phase(mEp);
1891 break;
1892 case USB_REQ_GET_STATUS:
1893 if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
1894 type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
1895 type != (USB_DIR_IN|USB_RECIP_INTERFACE))
1896 goto delegate;
1897 if (le16_to_cpu(req.wLength) != 2 ||
1898 le16_to_cpu(req.wValue) != 0)
1899 break;
1900 err = isr_get_status_response(mEp, &req);
1901 break;
1902 case USB_REQ_SET_ADDRESS:
1903 if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
1904 goto delegate;
1905 if (le16_to_cpu(req.wLength) != 0 ||
1906 le16_to_cpu(req.wIndex) != 0)
1907 break;
1908 err = hw_usb_set_address((u8)le16_to_cpu(req.wValue));
1909 if (err)
1910 break;
1911 err = isr_setup_status_phase(mEp);
1912 break;
1913 case USB_REQ_SET_FEATURE:
1914 if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1915 le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
1916 goto delegate;
1917 if (req.wLength != 0)
1918 break;
1919 num = le16_to_cpu(req.wIndex);
1920 num &= USB_ENDPOINT_NUMBER_MASK;
1921
1922 spin_unlock(udc->lock);
1923 err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
1924 spin_lock(udc->lock);
1925 if (err)
1926 break;
1927 err = isr_setup_status_phase(mEp);
1928 break;
1929 default:
1930delegate:
1931 if (req.wLength == 0) /* no data phase */
1932 mEp->dir = TX;
1933
1934 spin_unlock(udc->lock);
1935 err = udc->driver->setup(&udc->gadget, &req);
1936 spin_lock(udc->lock);
1937 break;
1938 }
1939
1940 if (err < 0) {
1941 dbg_event(_usb_addr(mEp), "ERROR", err);
1942
1943 spin_unlock(udc->lock);
1944 if (usb_ep_set_halt(&mEp->ep))
1945 err("error: ep_set_halt");
1946 spin_lock(udc->lock);
1947 }
1948 }
1949}
1950
1951/******************************************************************************
1952 * ENDPT block
1953 *****************************************************************************/
1954/**
1955 * ep_enable: configure endpoint, making it usable
1956 *
1957 * Check usb_ep_enable() at "usb_gadget.h" for details
1958 */
1959static int ep_enable(struct usb_ep *ep,
1960 const struct usb_endpoint_descriptor *desc)
1961{
1962 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1963 int direction, retval = 0;
1964 unsigned long flags;
1965
1966 trace("%p, %p", ep, desc);
1967
1968 if (ep == NULL || desc == NULL)
1969 return -EINVAL;
1970
1971 spin_lock_irqsave(mEp->lock, flags);
1972
1973 /* only internal SW should enable ctrl endpts */
1974
1975 mEp->desc = desc;
1976
1977 if (!list_empty(&mEp->qh[mEp->dir].queue))
1978 warn("enabling a non-empty endpoint!");
1979
1980 mEp->dir = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? TX : RX;
1981 mEp->num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1982 mEp->type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
1983
1984 mEp->ep.maxpacket = __constant_le16_to_cpu(desc->wMaxPacketSize);
1985
1986 direction = mEp->dir;
1987 do {
1988 dbg_event(_usb_addr(mEp), "ENABLE", 0);
1989
1990 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1991 mEp->qh[mEp->dir].ptr->cap |= QH_IOS;
1992 else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
1993 mEp->qh[mEp->dir].ptr->cap &= ~QH_MULT;
1994 else
1995 mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
1996
1997 mEp->qh[mEp->dir].ptr->cap |=
1998 (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
1999 mEp->qh[mEp->dir].ptr->td.next |= TD_TERMINATE; /* needed? */
2000
2001 retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
2002
2003 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2004 mEp->dir = (mEp->dir == TX) ? RX : TX;
2005
2006 } while (mEp->dir != direction);
2007
2008 spin_unlock_irqrestore(mEp->lock, flags);
2009 return retval;
2010}
2011
2012/**
2013 * ep_disable: endpoint is no longer usable
2014 *
2015 * Check usb_ep_disable() at "usb_gadget.h" for details
2016 */
2017static int ep_disable(struct usb_ep *ep)
2018{
2019 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2020 int direction, retval = 0;
2021 unsigned long flags;
2022
2023 trace("%p", ep);
2024
2025 if (ep == NULL)
2026 return -EINVAL;
2027 else if (mEp->desc == NULL)
2028 return -EBUSY;
2029
2030 spin_lock_irqsave(mEp->lock, flags);
2031
2032 /* only internal SW should disable ctrl endpts */
2033
2034 direction = mEp->dir;
2035 do {
2036 dbg_event(_usb_addr(mEp), "DISABLE", 0);
2037
2038 retval |= _ep_nuke(mEp);
2039 retval |= hw_ep_disable(mEp->num, mEp->dir);
2040
2041 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2042 mEp->dir = (mEp->dir == TX) ? RX : TX;
2043
2044 } while (mEp->dir != direction);
2045
2046 mEp->desc = NULL;
2047
2048 spin_unlock_irqrestore(mEp->lock, flags);
2049 return retval;
2050}
2051
2052/**
2053 * ep_alloc_request: allocate a request object to use with this endpoint
2054 *
2055 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
2056 */
2057static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
2058{
2059 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2060 struct ci13xxx_req *mReq = NULL;
2061 unsigned long flags;
2062
2063 trace("%p, %i", ep, gfp_flags);
2064
2065 if (ep == NULL) {
2066 err("EINVAL");
2067 return NULL;
2068 }
2069
2070 spin_lock_irqsave(mEp->lock, flags);
2071
2072 mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
2073 if (mReq != NULL) {
2074 INIT_LIST_HEAD(&mReq->queue);
2075
2076 mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
2077 &mReq->dma);
2078 if (mReq->ptr == NULL) {
2079 kfree(mReq);
2080 mReq = NULL;
2081 }
2082 }
2083
2084 dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
2085
2086 spin_unlock_irqrestore(mEp->lock, flags);
2087
2088 return (mReq == NULL) ? NULL : &mReq->req;
2089}
2090
2091/**
2092 * ep_free_request: frees a request object
2093 *
2094 * Check usb_ep_free_request() at "usb_gadget.h" for details
2095 */
2096static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
2097{
2098 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2099 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2100 unsigned long flags;
2101
2102 trace("%p, %p", ep, req);
2103
2104 if (ep == NULL || req == NULL) {
2105 err("EINVAL");
2106 return;
2107 } else if (!list_empty(&mReq->queue)) {
2108 err("EBUSY");
2109 return;
2110 }
2111
2112 spin_lock_irqsave(mEp->lock, flags);
2113
2114 if (mReq->ptr)
2115 dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
2116 kfree(mReq);
2117
2118 dbg_event(_usb_addr(mEp), "FREE", 0);
2119
2120 spin_unlock_irqrestore(mEp->lock, flags);
2121}
2122
2123/**
2124 * ep_queue: queues (submits) an I/O request to an endpoint
2125 *
2126 * Check usb_ep_queue()* at usb_gadget.h" for details
2127 */
2128static int ep_queue(struct usb_ep *ep, struct usb_request *req,
2129 gfp_t __maybe_unused gfp_flags)
2130{
2131 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2132 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2133 int retval = 0;
2134 unsigned long flags;
2135
2136 trace("%p, %p, %X", ep, req, gfp_flags);
2137
2138 if (ep == NULL || req == NULL || mEp->desc == NULL)
2139 return -EINVAL;
2140
2141 spin_lock_irqsave(mEp->lock, flags);
2142
2143 if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
2144 !list_empty(&mEp->qh[mEp->dir].queue)) {
2145 _ep_nuke(mEp);
2146 retval = -EOVERFLOW;
2147 warn("endpoint ctrl %X nuked", _usb_addr(mEp));
2148 }
2149
2150 /* first nuke then test link, e.g. previous status has not sent */
2151 if (!list_empty(&mReq->queue)) {
2152 retval = -EBUSY;
2153 err("request already in queue");
2154 goto done;
2155 }
2156
2157 if (req->length > (4 * PAGE_SIZE)) {
2158 req->length = (4 * PAGE_SIZE);
2159 retval = -EMSGSIZE;
2160 warn("request length truncated");
2161 }
2162
2163 dbg_queue(_usb_addr(mEp), req, retval);
2164
2165 /* push request */
2166 mReq->req.status = -EINPROGRESS;
2167 mReq->req.actual = 0;
2168 list_add_tail(&mReq->queue, &mEp->qh[mEp->dir].queue);
2169
2170 retval = _hardware_enqueue(mEp, mReq);
2171 if (retval == -EALREADY || retval == -EBUSY) {
2172 dbg_event(_usb_addr(mEp), "QUEUE", retval);
2173 retval = 0;
2174 }
2175
2176 done:
2177 spin_unlock_irqrestore(mEp->lock, flags);
2178 return retval;
2179}
2180
2181/**
2182 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
2183 *
2184 * Check usb_ep_dequeue() at "usb_gadget.h" for details
2185 */
2186static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
2187{
2188 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2189 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2190 unsigned long flags;
2191
2192 trace("%p, %p", ep, req);
2193
2194 if (ep == NULL || req == NULL || mEp->desc == NULL ||
2195 list_empty(&mReq->queue) || list_empty(&mEp->qh[mEp->dir].queue))
2196 return -EINVAL;
2197
2198 spin_lock_irqsave(mEp->lock, flags);
2199
2200 dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
2201
2202 if (mReq->req.status == -EALREADY)
2203 _hardware_dequeue(mEp, mReq);
2204
2205 /* pop request */
2206 list_del_init(&mReq->queue);
2207 req->status = -ECONNRESET;
2208
2209 if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
2210 spin_unlock(mEp->lock);
2211 mReq->req.complete(&mEp->ep, &mReq->req);
2212 spin_lock(mEp->lock);
2213 }
2214
2215 spin_unlock_irqrestore(mEp->lock, flags);
2216 return 0;
2217}
2218
2219/**
2220 * ep_set_halt: sets the endpoint halt feature
2221 *
2222 * Check usb_ep_set_halt() at "usb_gadget.h" for details
2223 */
2224static int ep_set_halt(struct usb_ep *ep, int value)
2225{
2226 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2227 int direction, retval = 0;
2228 unsigned long flags;
2229
2230 trace("%p, %i", ep, value);
2231
2232 if (ep == NULL || mEp->desc == NULL)
2233 return -EINVAL;
2234
2235 spin_lock_irqsave(mEp->lock, flags);
2236
2237#ifndef STALL_IN
2238 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
2239 if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
2240 !list_empty(&mEp->qh[mEp->dir].queue)) {
2241 spin_unlock_irqrestore(mEp->lock, flags);
2242 return -EAGAIN;
2243 }
2244#endif
2245
2246 direction = mEp->dir;
2247 do {
2248 dbg_event(_usb_addr(mEp), "HALT", value);
2249 retval |= hw_ep_set_halt(mEp->num, mEp->dir, value);
2250
2251 if (!value)
2252 mEp->wedge = 0;
2253
2254 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2255 mEp->dir = (mEp->dir == TX) ? RX : TX;
2256
2257 } while (mEp->dir != direction);
2258
2259 spin_unlock_irqrestore(mEp->lock, flags);
2260 return retval;
2261}
2262
2263/**
2264 * ep_set_wedge: sets the halt feature and ignores clear requests
2265 *
2266 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
2267 */
2268static int ep_set_wedge(struct usb_ep *ep)
2269{
2270 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2271 unsigned long flags;
2272
2273 trace("%p", ep);
2274
2275 if (ep == NULL || mEp->desc == NULL)
2276 return -EINVAL;
2277
2278 spin_lock_irqsave(mEp->lock, flags);
2279
2280 dbg_event(_usb_addr(mEp), "WEDGE", 0);
2281 mEp->wedge = 1;
2282
2283 spin_unlock_irqrestore(mEp->lock, flags);
2284
2285 return usb_ep_set_halt(ep);
2286}
2287
2288/**
2289 * ep_fifo_flush: flushes contents of a fifo
2290 *
2291 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
2292 */
2293static void ep_fifo_flush(struct usb_ep *ep)
2294{
2295 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2296 unsigned long flags;
2297
2298 trace("%p", ep);
2299
2300 if (ep == NULL) {
2301 err("%02X: -EINVAL", _usb_addr(mEp));
2302 return;
2303 }
2304
2305 spin_lock_irqsave(mEp->lock, flags);
2306
2307 dbg_event(_usb_addr(mEp), "FFLUSH", 0);
2308 hw_ep_flush(mEp->num, mEp->dir);
2309
2310 spin_unlock_irqrestore(mEp->lock, flags);
2311}
2312
2313/**
2314 * Endpoint-specific part of the API to the USB controller hardware
2315 * Check "usb_gadget.h" for details
2316 */
2317static const struct usb_ep_ops usb_ep_ops = {
2318 .enable = ep_enable,
2319 .disable = ep_disable,
2320 .alloc_request = ep_alloc_request,
2321 .free_request = ep_free_request,
2322 .queue = ep_queue,
2323 .dequeue = ep_dequeue,
2324 .set_halt = ep_set_halt,
2325 .set_wedge = ep_set_wedge,
2326 .fifo_flush = ep_fifo_flush,
2327};
2328
2329/******************************************************************************
2330 * GADGET block
2331 *****************************************************************************/
2332/**
2333 * Device operations part of the API to the USB controller hardware,
2334 * which don't involve endpoints (or i/o)
2335 * Check "usb_gadget.h" for details
2336 */
2337static const struct usb_gadget_ops usb_gadget_ops;
2338
2339/**
2340 * usb_gadget_register_driver: register a gadget driver
2341 *
2342 * Check usb_gadget_register_driver() at "usb_gadget.h" for details
2343 * Interrupts are enabled here
2344 */
2345int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2346{
2347 struct ci13xxx *udc = _udc;
2348 unsigned long i, k, flags;
2349 int retval = -ENOMEM;
2350
2351 trace("%p", driver);
2352
2353 if (driver == NULL ||
2354 driver->bind == NULL ||
2355 driver->unbind == NULL ||
2356 driver->setup == NULL ||
2357 driver->disconnect == NULL ||
2358 driver->suspend == NULL ||
2359 driver->resume == NULL)
2360 return -EINVAL;
2361 else if (udc == NULL)
2362 return -ENODEV;
2363 else if (udc->driver != NULL)
2364 return -EBUSY;
2365
2366 /* alloc resources */
2367 udc->qh_pool = dma_pool_create("ci13xxx_qh", &udc->gadget.dev,
2368 sizeof(struct ci13xxx_qh),
2369 64, PAGE_SIZE);
2370 if (udc->qh_pool == NULL)
2371 return -ENOMEM;
2372
2373 udc->td_pool = dma_pool_create("ci13xxx_td", &udc->gadget.dev,
2374 sizeof(struct ci13xxx_td),
2375 64, PAGE_SIZE);
2376 if (udc->td_pool == NULL) {
2377 dma_pool_destroy(udc->qh_pool);
2378 udc->qh_pool = NULL;
2379 return -ENOMEM;
2380 }
2381
2382 spin_lock_irqsave(udc->lock, flags);
2383
2384 info("hw_ep_max = %d", hw_ep_max);
2385
2386 udc->driver = driver;
2387 udc->gadget.ops = NULL;
2388 udc->gadget.dev.driver = NULL;
2389
2390 retval = 0;
2391 for (i = 0; i < hw_ep_max; i++) {
2392 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
2393
2394 scnprintf(mEp->name, sizeof(mEp->name), "ep%i", (int)i);
2395
2396 mEp->lock = udc->lock;
2397 mEp->device = &udc->gadget.dev;
2398 mEp->td_pool = udc->td_pool;
2399
2400 mEp->ep.name = mEp->name;
2401 mEp->ep.ops = &usb_ep_ops;
2402 mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
2403
2404 /* this allocation cannot be random */
2405 for (k = RX; k <= TX; k++) {
2406 INIT_LIST_HEAD(&mEp->qh[k].queue);
2407 mEp->qh[k].ptr = dma_pool_alloc(udc->qh_pool,
2408 GFP_KERNEL,
2409 &mEp->qh[k].dma);
2410 if (mEp->qh[k].ptr == NULL)
2411 retval = -ENOMEM;
2412 else
2413 memset(mEp->qh[k].ptr, 0,
2414 sizeof(*mEp->qh[k].ptr));
2415 }
2416 if (i == 0)
2417 udc->gadget.ep0 = &mEp->ep;
2418 else
2419 list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
2420 }
2421 if (retval)
2422 goto done;
2423
2424 /* bind gadget */
2425 driver->driver.bus = NULL;
2426 udc->gadget.ops = &usb_gadget_ops;
2427 udc->gadget.dev.driver = &driver->driver;
2428
2429 spin_unlock_irqrestore(udc->lock, flags);
2430 retval = driver->bind(&udc->gadget); /* MAY SLEEP */
2431 spin_lock_irqsave(udc->lock, flags);
2432
2433 if (retval) {
2434 udc->gadget.ops = NULL;
2435 udc->gadget.dev.driver = NULL;
2436 goto done;
2437 }
2438
2439 retval = hw_device_state(udc->ci13xxx_ep[0].qh[RX].dma);
2440
2441 done:
2442 spin_unlock_irqrestore(udc->lock, flags);
2443 if (retval)
2444 usb_gadget_unregister_driver(driver);
2445 return retval;
2446}
2447EXPORT_SYMBOL(usb_gadget_register_driver);
2448
2449/**
2450 * usb_gadget_unregister_driver: unregister a gadget driver
2451 *
2452 * Check usb_gadget_unregister_driver() at "usb_gadget.h" for details
2453 */
2454int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2455{
2456 struct ci13xxx *udc = _udc;
2457 unsigned long i, k, flags;
2458
2459 trace("%p", driver);
2460
2461 if (driver == NULL ||
2462 driver->bind == NULL ||
2463 driver->unbind == NULL ||
2464 driver->setup == NULL ||
2465 driver->disconnect == NULL ||
2466 driver->suspend == NULL ||
2467 driver->resume == NULL ||
2468 driver != udc->driver)
2469 return -EINVAL;
2470
2471 spin_lock_irqsave(udc->lock, flags);
2472
2473 hw_device_state(0);
2474
2475 /* unbind gadget */
2476 if (udc->gadget.ops != NULL) {
2477 _gadget_stop_activity(&udc->gadget);
2478
2479 spin_unlock_irqrestore(udc->lock, flags);
2480 driver->unbind(&udc->gadget); /* MAY SLEEP */
2481 spin_lock_irqsave(udc->lock, flags);
2482
2483 udc->gadget.ops = NULL;
2484 udc->gadget.dev.driver = NULL;
2485 }
2486
2487 /* free resources */
2488 for (i = 0; i < hw_ep_max; i++) {
2489 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
2490
2491 if (i == 0)
2492 udc->gadget.ep0 = NULL;
2493 else if (!list_empty(&mEp->ep.ep_list))
2494 list_del_init(&mEp->ep.ep_list);
2495
2496 for (k = RX; k <= TX; k++)
2497 if (mEp->qh[k].ptr != NULL)
2498 dma_pool_free(udc->qh_pool,
2499 mEp->qh[k].ptr, mEp->qh[k].dma);
2500 }
2501
2502 udc->driver = NULL;
2503
2504 spin_unlock_irqrestore(udc->lock, flags);
2505
2506 if (udc->td_pool != NULL) {
2507 dma_pool_destroy(udc->td_pool);
2508 udc->td_pool = NULL;
2509 }
2510 if (udc->qh_pool != NULL) {
2511 dma_pool_destroy(udc->qh_pool);
2512 udc->qh_pool = NULL;
2513 }
2514
2515 return 0;
2516}
2517EXPORT_SYMBOL(usb_gadget_unregister_driver);
2518
2519/******************************************************************************
2520 * BUS block
2521 *****************************************************************************/
2522/**
2523 * udc_irq: global interrupt handler
2524 *
2525 * This function returns IRQ_HANDLED if the IRQ has been handled
2526 * It locks access to registers
2527 */
2528static irqreturn_t udc_irq(void)
2529{
2530 struct ci13xxx *udc = _udc;
2531 irqreturn_t retval;
2532 u32 intr;
2533
2534 trace();
2535
2536 if (udc == NULL) {
2537 err("ENODEV");
2538 return IRQ_HANDLED;
2539 }
2540
2541 spin_lock(udc->lock);
2542 intr = hw_test_and_clear_intr_active();
2543 if (intr) {
2544 isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
2545 isr_statistics.hndl.idx &= ISR_MASK;
2546 isr_statistics.hndl.cnt++;
2547
2548 /* order defines priority - do NOT change it */
2549 if (USBi_URI & intr) {
2550 isr_statistics.uri++;
2551 isr_reset_handler(udc);
2552 }
2553 if (USBi_PCI & intr) {
2554 isr_statistics.pci++;
2555 udc->gadget.speed = hw_port_is_high_speed() ?
2556 USB_SPEED_HIGH : USB_SPEED_FULL;
2557 }
2558 if (USBi_UEI & intr)
2559 isr_statistics.uei++;
2560 if (USBi_UI & intr) {
2561 isr_statistics.ui++;
2562 isr_tr_complete_handler(udc);
2563 }
2564 if (USBi_SLI & intr)
2565 isr_statistics.sli++;
2566 retval = IRQ_HANDLED;
2567 } else {
2568 isr_statistics.none++;
2569 retval = IRQ_NONE;
2570 }
2571 spin_unlock(udc->lock);
2572
2573 return retval;
2574}
2575
2576/**
2577 * udc_release: driver release function
2578 * @dev: device
2579 *
2580 * Currently does nothing
2581 */
2582static void udc_release(struct device *dev)
2583{
2584 trace("%p", dev);
2585
2586 if (dev == NULL)
2587 err("EINVAL");
2588}
2589
2590/**
2591 * udc_probe: parent probe must call this to initialize UDC
2592 * @dev: parent device
2593 * @regs: registers base address
2594 * @name: driver name
2595 *
2596 * This function returns an error code
2597 * No interrupts active, the IRQ has not been requested yet
2598 * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
2599 */
2600static int udc_probe(struct device *dev, void __iomem *regs, const char *name)
2601{
2602 struct ci13xxx *udc;
2603 int retval = 0;
2604
2605 trace("%p, %p, %p", dev, regs, name);
2606
2607 if (dev == NULL || regs == NULL || name == NULL)
2608 return -EINVAL;
2609
2610 udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
2611 if (udc == NULL)
2612 return -ENOMEM;
2613
2614 udc->lock = &udc_lock;
2615
2616 retval = hw_device_reset(regs);
2617 if (retval)
2618 goto done;
2619
2620 udc->gadget.ops = NULL;
2621 udc->gadget.speed = USB_SPEED_UNKNOWN;
2622 udc->gadget.is_dualspeed = 1;
2623 udc->gadget.is_otg = 0;
2624 udc->gadget.name = name;
2625
2626 INIT_LIST_HEAD(&udc->gadget.ep_list);
2627 udc->gadget.ep0 = NULL;
2628
2629 strcpy(udc->gadget.dev.bus_id, "gadget");
2630 udc->gadget.dev.dma_mask = dev->dma_mask;
2631 udc->gadget.dev.parent = dev;
2632 udc->gadget.dev.release = udc_release;
2633
2634 retval = device_register(&udc->gadget.dev);
2635 if (retval)
2636 goto done;
2637
2638#ifdef CONFIG_USB_GADGET_DEBUG_FILES
2639 retval = dbg_create_files(&udc->gadget.dev);
2640#endif
2641 if (retval) {
2642 device_unregister(&udc->gadget.dev);
2643 goto done;
2644 }
2645
2646 _udc = udc;
2647 return retval;
2648
2649 done:
2650 err("error = %i", retval);
2651 kfree(udc);
2652 _udc = NULL;
2653 return retval;
2654}
2655
2656/**
2657 * udc_remove: parent remove must call this to remove UDC
2658 *
2659 * No interrupts active, the IRQ has been released
2660 */
2661static void udc_remove(void)
2662{
2663 struct ci13xxx *udc = _udc;
2664
2665 if (udc == NULL) {
2666 err("EINVAL");
2667 return;
2668 }
2669
2670#ifdef CONFIG_USB_GADGET_DEBUG_FILES
2671 dbg_remove_files(&udc->gadget.dev);
2672#endif
2673 device_unregister(&udc->gadget.dev);
2674
2675 kfree(udc);
2676 _udc = NULL;
2677}
2678
2679/******************************************************************************
2680 * PCI block
2681 *****************************************************************************/
2682/**
2683 * ci13xxx_pci_irq: interrut handler
2684 * @irq: irq number
2685 * @pdev: USB Device Controller interrupt source
2686 *
2687 * This function returns IRQ_HANDLED if the IRQ has been handled
2688 * This is an ISR don't trace, use attribute interface instead
2689 */
2690static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
2691{
2692 if (irq == 0) {
2693 dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
2694 return IRQ_HANDLED;
2695 }
2696 return udc_irq();
2697}
2698
2699/**
2700 * ci13xxx_pci_probe: PCI probe
2701 * @pdev: USB device controller being probed
2702 * @id: PCI hotplug ID connecting controller to UDC framework
2703 *
2704 * This function returns an error code
2705 * Allocates basic PCI resources for this USB device controller, and then
2706 * invokes the udc_probe() method to start the UDC associated with it
2707 */
2708static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
2709 const struct pci_device_id *id)
2710{
2711 void __iomem *regs = NULL;
2712 int retval = 0;
2713
2714 if (id == NULL)
2715 return -EINVAL;
2716
2717 retval = pci_enable_device(pdev);
2718 if (retval)
2719 goto done;
2720
2721 if (!pdev->irq) {
2722 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
2723 retval = -ENODEV;
2724 goto disable_device;
2725 }
2726
2727 retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
2728 if (retval)
2729 goto disable_device;
2730
2731 /* BAR 0 holds all the registers */
2732 regs = pci_iomap(pdev, 0, 0);
2733 if (!regs) {
2734 dev_err(&pdev->dev, "Error mapping memory!");
2735 retval = -EFAULT;
2736 goto release_regions;
2737 }
2738 pci_set_drvdata(pdev, (__force void *)regs);
2739
2740 pci_set_master(pdev);
2741 pci_try_set_mwi(pdev);
2742
2743 retval = udc_probe(&pdev->dev, regs, UDC_DRIVER_NAME);
2744 if (retval)
2745 goto iounmap;
2746
2747 /* our device does not have MSI capability */
2748
2749 retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
2750 UDC_DRIVER_NAME, pdev);
2751 if (retval)
2752 goto gadget_remove;
2753
2754 return 0;
2755
2756 gadget_remove:
2757 udc_remove();
2758 iounmap:
2759 pci_iounmap(pdev, regs);
2760 release_regions:
2761 pci_release_regions(pdev);
2762 disable_device:
2763 pci_disable_device(pdev);
2764 done:
2765 return retval;
2766}
2767
2768/**
2769 * ci13xxx_pci_remove: PCI remove
2770 * @pdev: USB Device Controller being removed
2771 *
2772 * Reverses the effect of ci13xxx_pci_probe(),
2773 * first invoking the udc_remove() and then releases
2774 * all PCI resources allocated for this USB device controller
2775 */
2776static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
2777{
2778 free_irq(pdev->irq, pdev);
2779 udc_remove();
2780 pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
2781 pci_release_regions(pdev);
2782 pci_disable_device(pdev);
2783}
2784
2785/**
2786 * PCI device table
2787 * PCI device structure
2788 *
2789 * Check "pci.h" for details
2790 */
2791static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
2792 { PCI_DEVICE(0x153F, 0x1004) },
2793 { PCI_DEVICE(0x153F, 0x1006) },
2794 { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
2795};
2796MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
2797
2798static struct pci_driver ci13xxx_pci_driver = {
2799 .name = UDC_DRIVER_NAME,
2800 .id_table = ci13xxx_pci_id_table,
2801 .probe = ci13xxx_pci_probe,
2802 .remove = __devexit_p(ci13xxx_pci_remove),
2803};
2804
2805/**
2806 * ci13xxx_pci_init: module init
2807 *
2808 * Driver load
2809 */
2810static int __init ci13xxx_pci_init(void)
2811{
2812 return pci_register_driver(&ci13xxx_pci_driver);
2813}
2814module_init(ci13xxx_pci_init);
2815
2816/**
2817 * ci13xxx_pci_exit: module exit
2818 *
2819 * Driver unload
2820 */
2821static void __exit ci13xxx_pci_exit(void)
2822{
2823 pci_unregister_driver(&ci13xxx_pci_driver);
2824}
2825module_exit(ci13xxx_pci_exit);
2826
2827MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
2828MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
2829MODULE_LICENSE("GPL");
2830MODULE_VERSION("June 2008");
diff --git a/drivers/usb/gadget/ci13xxx_udc.h b/drivers/usb/gadget/ci13xxx_udc.h
new file mode 100644
index 000000000000..4026e9cede34
--- /dev/null
+++ b/drivers/usb/gadget/ci13xxx_udc.h
@@ -0,0 +1,195 @@
1/*
2 * ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
3 *
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
5 *
6 * Author: David Lopo
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Description: MIPS USB IP core family device controller
13 * Structures, registers and logging macros
14 */
15
16#ifndef _CI13XXX_h_
17#define _CI13XXX_h_
18
19/******************************************************************************
20 * DEFINE
21 *****************************************************************************/
22#define ENDPT_MAX (16)
23#define CTRL_PAYLOAD_MAX (64)
24#define RX (0) /* similar to USB_DIR_OUT but can be used as an index */
25#define TX (1) /* similar to USB_DIR_IN but can be used as an index */
26
27/******************************************************************************
28 * STRUCTURES
29 *****************************************************************************/
30/* DMA layout of transfer descriptors */
31struct ci13xxx_td {
32 /* 0 */
33 u32 next;
34#define TD_TERMINATE BIT(0)
35 /* 1 */
36 u32 token;
37#define TD_STATUS (0x00FFUL << 0)
38#define TD_STATUS_TR_ERR BIT(3)
39#define TD_STATUS_DT_ERR BIT(5)
40#define TD_STATUS_HALTED BIT(6)
41#define TD_STATUS_ACTIVE BIT(7)
42#define TD_MULTO (0x0003UL << 10)
43#define TD_IOC BIT(15)
44#define TD_TOTAL_BYTES (0x7FFFUL << 16)
45 /* 2 */
46 u32 page[5];
47#define TD_CURR_OFFSET (0x0FFFUL << 0)
48#define TD_FRAME_NUM (0x07FFUL << 0)
49#define TD_RESERVED_MASK (0x0FFFUL << 0)
50} __attribute__ ((packed));
51
52/* DMA layout of queue heads */
53struct ci13xxx_qh {
54 /* 0 */
55 u32 cap;
56#define QH_IOS BIT(15)
57#define QH_MAX_PKT (0x07FFUL << 16)
58#define QH_ZLT BIT(29)
59#define QH_MULT (0x0003UL << 30)
60 /* 1 */
61 u32 curr;
62 /* 2 - 8 */
63 struct ci13xxx_td td;
64 /* 9 */
65 u32 RESERVED;
66 struct usb_ctrlrequest setup;
67} __attribute__ ((packed));
68
69/* Extension of usb_request */
70struct ci13xxx_req {
71 struct usb_request req;
72 unsigned map;
73 struct list_head queue;
74 struct ci13xxx_td *ptr;
75 dma_addr_t dma;
76};
77
78/* Extension of usb_ep */
79struct ci13xxx_ep {
80 struct usb_ep ep;
81 const struct usb_endpoint_descriptor *desc;
82 u8 dir;
83 u8 num;
84 u8 type;
85 char name[16];
86 struct {
87 struct list_head queue;
88 struct ci13xxx_qh *ptr;
89 dma_addr_t dma;
90 } qh[2];
91 struct usb_request *status;
92 int wedge;
93
94 /* global resources */
95 spinlock_t *lock;
96 struct device *device;
97 struct dma_pool *td_pool;
98};
99
100/* CI13XXX UDC descriptor & global resources */
101struct ci13xxx {
102 spinlock_t *lock; /* ctrl register bank access */
103
104 struct dma_pool *qh_pool; /* DMA pool for queue heads */
105 struct dma_pool *td_pool; /* DMA pool for transfer descs */
106
107 struct usb_gadget gadget; /* USB slave device */
108 struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
109
110 struct usb_gadget_driver *driver; /* 3rd party gadget driver */
111};
112
113/******************************************************************************
114 * REGISTERS
115 *****************************************************************************/
116/* register size */
117#define REG_BITS (32)
118
119/* HCCPARAMS */
120#define HCCPARAMS_LEN BIT(17)
121
122/* DCCPARAMS */
123#define DCCPARAMS_DEN (0x1F << 0)
124#define DCCPARAMS_DC BIT(7)
125
126/* TESTMODE */
127#define TESTMODE_FORCE BIT(0)
128
129/* USBCMD */
130#define USBCMD_RS BIT(0)
131#define USBCMD_RST BIT(1)
132#define USBCMD_SUTW BIT(13)
133
134/* USBSTS & USBINTR */
135#define USBi_UI BIT(0)
136#define USBi_UEI BIT(1)
137#define USBi_PCI BIT(2)
138#define USBi_URI BIT(6)
139#define USBi_SLI BIT(8)
140
141/* DEVICEADDR */
142#define DEVICEADDR_USBADRA BIT(24)
143#define DEVICEADDR_USBADR (0x7FUL << 25)
144
145/* PORTSC */
146#define PORTSC_SUSP BIT(7)
147#define PORTSC_HSP BIT(9)
148#define PORTSC_PTC (0x0FUL << 16)
149
150/* DEVLC */
151#define DEVLC_PSPD (0x03UL << 25)
152#define DEVLC_PSPD_HS (0x02UL << 25)
153
154/* USBMODE */
155#define USBMODE_CM (0x03UL << 0)
156#define USBMODE_CM_IDLE (0x00UL << 0)
157#define USBMODE_CM_DEVICE (0x02UL << 0)
158#define USBMODE_CM_HOST (0x03UL << 0)
159#define USBMODE_SLOM BIT(3)
160
161/* ENDPTCTRL */
162#define ENDPTCTRL_RXS BIT(0)
163#define ENDPTCTRL_RXT (0x03UL << 2)
164#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
165#define ENDPTCTRL_RXE BIT(7)
166#define ENDPTCTRL_TXS BIT(16)
167#define ENDPTCTRL_TXT (0x03UL << 18)
168#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
169#define ENDPTCTRL_TXE BIT(23)
170
171/******************************************************************************
172 * LOGGING
173 *****************************************************************************/
174#define ci13xxx_printk(level, format, args...) \
175do { \
176 if (_udc == NULL) \
177 printk(level "[%s] " format "\n", __func__, ## args); \
178 else \
179 dev_printk(level, _udc->gadget.dev.parent, \
180 "[%s] " format "\n", __func__, ## args); \
181} while (0)
182
183#define err(format, args...) ci13xxx_printk(KERN_ERR, format, ## args)
184#define warn(format, args...) ci13xxx_printk(KERN_WARNING, format, ## args)
185#define info(format, args...) ci13xxx_printk(KERN_INFO, format, ## args)
186
187#ifdef TRACE
188#define trace(format, args...) ci13xxx_printk(KERN_DEBUG, format, ## args)
189#define dbg_trace(format, args...) dev_dbg(dev, format, ##args)
190#else
191#define trace(format, args...) do {} while (0)
192#define dbg_trace(format, args...) do {} while (0)
193#endif
194
195#endif /* _CI13XXX_h_ */
diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index 4e3107dd2f34..c0679b176027 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -158,6 +158,11 @@
158#define gadget_is_fsl_qe(g) 0 158#define gadget_is_fsl_qe(g) 0
159#endif 159#endif
160 160
161#ifdef CONFIG_USB_GADGET_CI13XXX
162#define gadget_is_ci13xxx(g) (!strcmp("ci13xxx_udc", (g)->name))
163#else
164#define gadget_is_ci13xxx(g) 0
165#endif
161 166
162// CONFIG_USB_GADGET_SX2 167// CONFIG_USB_GADGET_SX2
163// CONFIG_USB_GADGET_AU1X00 168// CONFIG_USB_GADGET_AU1X00
@@ -225,6 +230,8 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
225 return 0x21; 230 return 0x21;
226 else if (gadget_is_fsl_qe(gadget)) 231 else if (gadget_is_fsl_qe(gadget))
227 return 0x22; 232 return 0x22;
233 else if (gadget_is_ci13xxx(gadget))
234 return 0x23;
228 return -ENOENT; 235 return -ENOENT;
229} 236}
230 237
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 14:27:54 -0500