]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/usb/gadget/fsl_udc_core.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'dwc3-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi...
[mirror_ubuntu-artful-kernel.git] / drivers / usb / gadget / fsl_udc_core.c
1 /*
2 * Copyright (C) 2004-2007,2011-2012 Freescale Semiconductor, Inc.
3 * All rights reserved.
4 *
5 * Author: Li Yang <leoli@freescale.com>
6 * Jiang Bo <tanya.jiang@freescale.com>
7 *
8 * Description:
9 * Freescale high-speed USB SOC DR module device controller driver.
10 * This can be found on MPC8349E/MPC8313E/MPC5121E cpus.
11 * The driver is previously named as mpc_udc. Based on bare board
12 * code from Dave Liu and Shlomi Gridish.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 */
19
20 #undef VERBOSE
21
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/ioport.h>
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/err.h>
28 #include <linux/slab.h>
29 #include <linux/init.h>
30 #include <linux/list.h>
31 #include <linux/interrupt.h>
32 #include <linux/proc_fs.h>
33 #include <linux/mm.h>
34 #include <linux/moduleparam.h>
35 #include <linux/device.h>
36 #include <linux/usb/ch9.h>
37 #include <linux/usb/gadget.h>
38 #include <linux/usb/otg.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/platform_device.h>
41 #include <linux/fsl_devices.h>
42 #include <linux/dmapool.h>
43 #include <linux/delay.h>
44
45 #include <asm/byteorder.h>
46 #include <asm/io.h>
47 #include <asm/unaligned.h>
48 #include <asm/dma.h>
49
50 #include "fsl_usb2_udc.h"
51
52 #define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver"
53 #define DRIVER_AUTHOR "Li Yang/Jiang Bo"
54 #define DRIVER_VERSION "Apr 20, 2007"
55
56 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
57
58 static const char driver_name[] = "fsl-usb2-udc";
59 static const char driver_desc[] = DRIVER_DESC;
60
61 static struct usb_dr_device *dr_regs;
62
63 static struct usb_sys_interface *usb_sys_regs;
64
65 /* it is initialized in probe() */
66 static struct fsl_udc *udc_controller = NULL;
67
68 static const struct usb_endpoint_descriptor
69 fsl_ep0_desc = {
70 .bLength = USB_DT_ENDPOINT_SIZE,
71 .bDescriptorType = USB_DT_ENDPOINT,
72 .bEndpointAddress = 0,
73 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
74 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
75 };
76
77 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
78
79 #ifdef CONFIG_PPC32
80 /*
81 * On some SoCs, the USB controller registers can be big or little endian,
82 * depending on the version of the chip. In order to be able to run the
83 * same kernel binary on 2 different versions of an SoC, the BE/LE decision
84 * must be made at run time. _fsl_readl and fsl_writel are pointers to the
85 * BE or LE readl() and writel() functions, and fsl_readl() and fsl_writel()
86 * call through those pointers. Platform code for SoCs that have BE USB
87 * registers should set pdata->big_endian_mmio flag.
88 *
89 * This also applies to controller-to-cpu accessors for the USB descriptors,
90 * since their endianness is also SoC dependant. Platform code for SoCs that
91 * have BE USB descriptors should set pdata->big_endian_desc flag.
92 */
93 static u32 _fsl_readl_be(const unsigned __iomem *p)
94 {
95 return in_be32(p);
96 }
97
98 static u32 _fsl_readl_le(const unsigned __iomem *p)
99 {
100 return in_le32(p);
101 }
102
103 static void _fsl_writel_be(u32 v, unsigned __iomem *p)
104 {
105 out_be32(p, v);
106 }
107
108 static void _fsl_writel_le(u32 v, unsigned __iomem *p)
109 {
110 out_le32(p, v);
111 }
112
113 static u32 (*_fsl_readl)(const unsigned __iomem *p);
114 static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
115
116 #define fsl_readl(p) (*_fsl_readl)((p))
117 #define fsl_writel(v, p) (*_fsl_writel)((v), (p))
118
119 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata)
120 {
121 if (pdata->big_endian_mmio) {
122 _fsl_readl = _fsl_readl_be;
123 _fsl_writel = _fsl_writel_be;
124 } else {
125 _fsl_readl = _fsl_readl_le;
126 _fsl_writel = _fsl_writel_le;
127 }
128 }
129
130 static inline u32 cpu_to_hc32(const u32 x)
131 {
132 return udc_controller->pdata->big_endian_desc
133 ? (__force u32)cpu_to_be32(x)
134 : (__force u32)cpu_to_le32(x);
135 }
136
137 static inline u32 hc32_to_cpu(const u32 x)
138 {
139 return udc_controller->pdata->big_endian_desc
140 ? be32_to_cpu((__force __be32)x)
141 : le32_to_cpu((__force __le32)x);
142 }
143 #else /* !CONFIG_PPC32 */
144 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
145
146 #define fsl_readl(addr) readl(addr)
147 #define fsl_writel(val32, addr) writel(val32, addr)
148 #define cpu_to_hc32(x) cpu_to_le32(x)
149 #define hc32_to_cpu(x) le32_to_cpu(x)
150 #endif /* CONFIG_PPC32 */
151
152 /********************************************************************
153 * Internal Used Function
154 ********************************************************************/
155 /*-----------------------------------------------------------------
156 * done() - retire a request; caller blocked irqs
157 * @status : request status to be set, only works when
158 * request is still in progress.
159 *--------------------------------------------------------------*/
160 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
161 {
162 struct fsl_udc *udc = NULL;
163 unsigned char stopped = ep->stopped;
164 struct ep_td_struct *curr_td, *next_td;
165 int j;
166
167 udc = (struct fsl_udc *)ep->udc;
168 /* Removed the req from fsl_ep->queue */
169 list_del_init(&req->queue);
170
171 /* req.status should be set as -EINPROGRESS in ep_queue() */
172 if (req->req.status == -EINPROGRESS)
173 req->req.status = status;
174 else
175 status = req->req.status;
176
177 /* Free dtd for the request */
178 next_td = req->head;
179 for (j = 0; j < req->dtd_count; j++) {
180 curr_td = next_td;
181 if (j != req->dtd_count - 1) {
182 next_td = curr_td->next_td_virt;
183 }
184 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
185 }
186
187 if (req->mapped) {
188 dma_unmap_single(ep->udc->gadget.dev.parent,
189 req->req.dma, req->req.length,
190 ep_is_in(ep)
191 ? DMA_TO_DEVICE
192 : DMA_FROM_DEVICE);
193 req->req.dma = DMA_ADDR_INVALID;
194 req->mapped = 0;
195 } else
196 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
197 req->req.dma, req->req.length,
198 ep_is_in(ep)
199 ? DMA_TO_DEVICE
200 : DMA_FROM_DEVICE);
201
202 if (status && (status != -ESHUTDOWN))
203 VDBG("complete %s req %p stat %d len %u/%u",
204 ep->ep.name, &req->req, status,
205 req->req.actual, req->req.length);
206
207 ep->stopped = 1;
208
209 spin_unlock(&ep->udc->lock);
210 /* complete() is from gadget layer,
211 * eg fsg->bulk_in_complete() */
212 if (req->req.complete)
213 req->req.complete(&ep->ep, &req->req);
214
215 spin_lock(&ep->udc->lock);
216 ep->stopped = stopped;
217 }
218
219 /*-----------------------------------------------------------------
220 * nuke(): delete all requests related to this ep
221 * called with spinlock held
222 *--------------------------------------------------------------*/
223 static void nuke(struct fsl_ep *ep, int status)
224 {
225 ep->stopped = 1;
226
227 /* Flush fifo */
228 fsl_ep_fifo_flush(&ep->ep);
229
230 /* Whether this eq has request linked */
231 while (!list_empty(&ep->queue)) {
232 struct fsl_req *req = NULL;
233
234 req = list_entry(ep->queue.next, struct fsl_req, queue);
235 done(ep, req, status);
236 }
237 }
238
239 /*------------------------------------------------------------------
240 Internal Hardware related function
241 ------------------------------------------------------------------*/
242
243 static int dr_controller_setup(struct fsl_udc *udc)
244 {
245 unsigned int tmp, portctrl, ep_num;
246 unsigned int max_no_of_ep;
247 unsigned int ctrl;
248 unsigned long timeout;
249
250 #define FSL_UDC_RESET_TIMEOUT 1000
251
252 /* Config PHY interface */
253 portctrl = fsl_readl(&dr_regs->portsc1);
254 portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
255 switch (udc->phy_mode) {
256 case FSL_USB2_PHY_ULPI:
257 if (udc->pdata->have_sysif_regs) {
258 if (udc->pdata->controller_ver) {
259 /* controller version 1.6 or above */
260 ctrl = __raw_readl(&usb_sys_regs->control);
261 ctrl &= ~USB_CTRL_UTMI_PHY_EN;
262 ctrl |= USB_CTRL_USB_EN;
263 __raw_writel(ctrl, &usb_sys_regs->control);
264 }
265 }
266 portctrl |= PORTSCX_PTS_ULPI;
267 break;
268 case FSL_USB2_PHY_UTMI_WIDE:
269 portctrl |= PORTSCX_PTW_16BIT;
270 /* fall through */
271 case FSL_USB2_PHY_UTMI:
272 if (udc->pdata->have_sysif_regs) {
273 if (udc->pdata->controller_ver) {
274 /* controller version 1.6 or above */
275 ctrl = __raw_readl(&usb_sys_regs->control);
276 ctrl |= (USB_CTRL_UTMI_PHY_EN |
277 USB_CTRL_USB_EN);
278 __raw_writel(ctrl, &usb_sys_regs->control);
279 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
280 PHY CLK to become stable - 10ms*/
281 }
282 }
283 portctrl |= PORTSCX_PTS_UTMI;
284 break;
285 case FSL_USB2_PHY_SERIAL:
286 portctrl |= PORTSCX_PTS_FSLS;
287 break;
288 default:
289 return -EINVAL;
290 }
291 fsl_writel(portctrl, &dr_regs->portsc1);
292
293 /* Stop and reset the usb controller */
294 tmp = fsl_readl(&dr_regs->usbcmd);
295 tmp &= ~USB_CMD_RUN_STOP;
296 fsl_writel(tmp, &dr_regs->usbcmd);
297
298 tmp = fsl_readl(&dr_regs->usbcmd);
299 tmp |= USB_CMD_CTRL_RESET;
300 fsl_writel(tmp, &dr_regs->usbcmd);
301
302 /* Wait for reset to complete */
303 timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
304 while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
305 if (time_after(jiffies, timeout)) {
306 ERR("udc reset timeout!\n");
307 return -ETIMEDOUT;
308 }
309 cpu_relax();
310 }
311
312 /* Set the controller as device mode */
313 tmp = fsl_readl(&dr_regs->usbmode);
314 tmp &= ~USB_MODE_CTRL_MODE_MASK; /* clear mode bits */
315 tmp |= USB_MODE_CTRL_MODE_DEVICE;
316 /* Disable Setup Lockout */
317 tmp |= USB_MODE_SETUP_LOCK_OFF;
318 if (udc->pdata->es)
319 tmp |= USB_MODE_ES;
320 fsl_writel(tmp, &dr_regs->usbmode);
321
322 /* Clear the setup status */
323 fsl_writel(0, &dr_regs->usbsts);
324
325 tmp = udc->ep_qh_dma;
326 tmp &= USB_EP_LIST_ADDRESS_MASK;
327 fsl_writel(tmp, &dr_regs->endpointlistaddr);
328
329 VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
330 udc->ep_qh, (int)tmp,
331 fsl_readl(&dr_regs->endpointlistaddr));
332
333 max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
334 for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
335 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
336 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
337 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
338 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
339 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
340 }
341 /* Config control enable i/o output, cpu endian register */
342 #ifndef CONFIG_ARCH_MXC
343 if (udc->pdata->have_sysif_regs) {
344 ctrl = __raw_readl(&usb_sys_regs->control);
345 ctrl |= USB_CTRL_IOENB;
346 __raw_writel(ctrl, &usb_sys_regs->control);
347 }
348 #endif
349
350 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
351 /* Turn on cache snooping hardware, since some PowerPC platforms
352 * wholly rely on hardware to deal with cache coherent. */
353
354 if (udc->pdata->have_sysif_regs) {
355 /* Setup Snooping for all the 4GB space */
356 tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
357 __raw_writel(tmp, &usb_sys_regs->snoop1);
358 tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
359 __raw_writel(tmp, &usb_sys_regs->snoop2);
360 }
361 #endif
362
363 return 0;
364 }
365
366 /* Enable DR irq and set controller to run state */
367 static void dr_controller_run(struct fsl_udc *udc)
368 {
369 u32 temp;
370
371 /* Enable DR irq reg */
372 temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
373 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
374 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
375
376 fsl_writel(temp, &dr_regs->usbintr);
377
378 /* Clear stopped bit */
379 udc->stopped = 0;
380
381 /* Set the controller as device mode */
382 temp = fsl_readl(&dr_regs->usbmode);
383 temp |= USB_MODE_CTRL_MODE_DEVICE;
384 fsl_writel(temp, &dr_regs->usbmode);
385
386 /* Set controller to Run */
387 temp = fsl_readl(&dr_regs->usbcmd);
388 temp |= USB_CMD_RUN_STOP;
389 fsl_writel(temp, &dr_regs->usbcmd);
390 }
391
392 static void dr_controller_stop(struct fsl_udc *udc)
393 {
394 unsigned int tmp;
395
396 pr_debug("%s\n", __func__);
397
398 /* if we're in OTG mode, and the Host is currently using the port,
399 * stop now and don't rip the controller out from under the
400 * ehci driver
401 */
402 if (udc->gadget.is_otg) {
403 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
404 pr_debug("udc: Leaving early\n");
405 return;
406 }
407 }
408
409 /* disable all INTR */
410 fsl_writel(0, &dr_regs->usbintr);
411
412 /* Set stopped bit for isr */
413 udc->stopped = 1;
414
415 /* disable IO output */
416 /* usb_sys_regs->control = 0; */
417
418 /* set controller to Stop */
419 tmp = fsl_readl(&dr_regs->usbcmd);
420 tmp &= ~USB_CMD_RUN_STOP;
421 fsl_writel(tmp, &dr_regs->usbcmd);
422 }
423
424 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
425 unsigned char ep_type)
426 {
427 unsigned int tmp_epctrl = 0;
428
429 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
430 if (dir) {
431 if (ep_num)
432 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
433 tmp_epctrl |= EPCTRL_TX_ENABLE;
434 tmp_epctrl &= ~EPCTRL_TX_TYPE;
435 tmp_epctrl |= ((unsigned int)(ep_type)
436 << EPCTRL_TX_EP_TYPE_SHIFT);
437 } else {
438 if (ep_num)
439 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
440 tmp_epctrl |= EPCTRL_RX_ENABLE;
441 tmp_epctrl &= ~EPCTRL_RX_TYPE;
442 tmp_epctrl |= ((unsigned int)(ep_type)
443 << EPCTRL_RX_EP_TYPE_SHIFT);
444 }
445
446 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
447 }
448
449 static void
450 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
451 {
452 u32 tmp_epctrl = 0;
453
454 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
455
456 if (value) {
457 /* set the stall bit */
458 if (dir)
459 tmp_epctrl |= EPCTRL_TX_EP_STALL;
460 else
461 tmp_epctrl |= EPCTRL_RX_EP_STALL;
462 } else {
463 /* clear the stall bit and reset data toggle */
464 if (dir) {
465 tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
466 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
467 } else {
468 tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
469 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
470 }
471 }
472 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
473 }
474
475 /* Get stall status of a specific ep
476 Return: 0: not stalled; 1:stalled */
477 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
478 {
479 u32 epctrl;
480
481 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
482 if (dir)
483 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
484 else
485 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
486 }
487
488 /********************************************************************
489 Internal Structure Build up functions
490 ********************************************************************/
491
492 /*------------------------------------------------------------------
493 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
494 * @zlt: Zero Length Termination Select (1: disable; 0: enable)
495 * @mult: Mult field
496 ------------------------------------------------------------------*/
497 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
498 unsigned char dir, unsigned char ep_type,
499 unsigned int max_pkt_len,
500 unsigned int zlt, unsigned char mult)
501 {
502 struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
503 unsigned int tmp = 0;
504
505 /* set the Endpoint Capabilites in QH */
506 switch (ep_type) {
507 case USB_ENDPOINT_XFER_CONTROL:
508 /* Interrupt On Setup (IOS). for control ep */
509 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
510 | EP_QUEUE_HEAD_IOS;
511 break;
512 case USB_ENDPOINT_XFER_ISOC:
513 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
514 | (mult << EP_QUEUE_HEAD_MULT_POS);
515 break;
516 case USB_ENDPOINT_XFER_BULK:
517 case USB_ENDPOINT_XFER_INT:
518 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
519 break;
520 default:
521 VDBG("error ep type is %d", ep_type);
522 return;
523 }
524 if (zlt)
525 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
526
527 p_QH->max_pkt_length = cpu_to_hc32(tmp);
528 p_QH->next_dtd_ptr = 1;
529 p_QH->size_ioc_int_sts = 0;
530 }
531
532 /* Setup qh structure and ep register for ep0. */
533 static void ep0_setup(struct fsl_udc *udc)
534 {
535 /* the intialization of an ep includes: fields in QH, Regs,
536 * fsl_ep struct */
537 struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
538 USB_MAX_CTRL_PAYLOAD, 0, 0);
539 struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
540 USB_MAX_CTRL_PAYLOAD, 0, 0);
541 dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
542 dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
543
544 return;
545
546 }
547
548 /***********************************************************************
549 Endpoint Management Functions
550 ***********************************************************************/
551
552 /*-------------------------------------------------------------------------
553 * when configurations are set, or when interface settings change
554 * for example the do_set_interface() in gadget layer,
555 * the driver will enable or disable the relevant endpoints
556 * ep0 doesn't use this routine. It is always enabled.
557 -------------------------------------------------------------------------*/
558 static int fsl_ep_enable(struct usb_ep *_ep,
559 const struct usb_endpoint_descriptor *desc)
560 {
561 struct fsl_udc *udc = NULL;
562 struct fsl_ep *ep = NULL;
563 unsigned short max = 0;
564 unsigned char mult = 0, zlt;
565 int retval = -EINVAL;
566 unsigned long flags = 0;
567
568 ep = container_of(_ep, struct fsl_ep, ep);
569
570 /* catch various bogus parameters */
571 if (!_ep || !desc
572 || (desc->bDescriptorType != USB_DT_ENDPOINT))
573 return -EINVAL;
574
575 udc = ep->udc;
576
577 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
578 return -ESHUTDOWN;
579
580 max = usb_endpoint_maxp(desc);
581
582 /* Disable automatic zlp generation. Driver is responsible to indicate
583 * explicitly through req->req.zero. This is needed to enable multi-td
584 * request. */
585 zlt = 1;
586
587 /* Assume the max packet size from gadget is always correct */
588 switch (desc->bmAttributes & 0x03) {
589 case USB_ENDPOINT_XFER_CONTROL:
590 case USB_ENDPOINT_XFER_BULK:
591 case USB_ENDPOINT_XFER_INT:
592 /* mult = 0. Execute N Transactions as demonstrated by
593 * the USB variable length packet protocol where N is
594 * computed using the Maximum Packet Length (dQH) and
595 * the Total Bytes field (dTD) */
596 mult = 0;
597 break;
598 case USB_ENDPOINT_XFER_ISOC:
599 /* Calculate transactions needed for high bandwidth iso */
600 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
601 max = max & 0x7ff; /* bit 0~10 */
602 /* 3 transactions at most */
603 if (mult > 3)
604 goto en_done;
605 break;
606 default:
607 goto en_done;
608 }
609
610 spin_lock_irqsave(&udc->lock, flags);
611 ep->ep.maxpacket = max;
612 ep->ep.desc = desc;
613 ep->stopped = 0;
614
615 /* Controller related setup */
616 /* Init EPx Queue Head (Ep Capabilites field in QH
617 * according to max, zlt, mult) */
618 struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
619 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
620 ? USB_SEND : USB_RECV),
621 (unsigned char) (desc->bmAttributes
622 & USB_ENDPOINT_XFERTYPE_MASK),
623 max, zlt, mult);
624
625 /* Init endpoint ctrl register */
626 dr_ep_setup((unsigned char) ep_index(ep),
627 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
628 ? USB_SEND : USB_RECV),
629 (unsigned char) (desc->bmAttributes
630 & USB_ENDPOINT_XFERTYPE_MASK));
631
632 spin_unlock_irqrestore(&udc->lock, flags);
633 retval = 0;
634
635 VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
636 ep->ep.desc->bEndpointAddress & 0x0f,
637 (desc->bEndpointAddress & USB_DIR_IN)
638 ? "in" : "out", max);
639 en_done:
640 return retval;
641 }
642
643 /*---------------------------------------------------------------------
644 * @ep : the ep being unconfigured. May not be ep0
645 * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
646 *---------------------------------------------------------------------*/
647 static int fsl_ep_disable(struct usb_ep *_ep)
648 {
649 struct fsl_udc *udc = NULL;
650 struct fsl_ep *ep = NULL;
651 unsigned long flags = 0;
652 u32 epctrl;
653 int ep_num;
654
655 ep = container_of(_ep, struct fsl_ep, ep);
656 if (!_ep || !ep->ep.desc) {
657 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
658 return -EINVAL;
659 }
660
661 /* disable ep on controller */
662 ep_num = ep_index(ep);
663 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
664 if (ep_is_in(ep)) {
665 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
666 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
667 } else {
668 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
669 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
670 }
671 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
672
673 udc = (struct fsl_udc *)ep->udc;
674 spin_lock_irqsave(&udc->lock, flags);
675
676 /* nuke all pending requests (does flush) */
677 nuke(ep, -ESHUTDOWN);
678
679 ep->ep.desc = NULL;
680 ep->stopped = 1;
681 spin_unlock_irqrestore(&udc->lock, flags);
682
683 VDBG("disabled %s OK", _ep->name);
684 return 0;
685 }
686
687 /*---------------------------------------------------------------------
688 * allocate a request object used by this endpoint
689 * the main operation is to insert the req->queue to the eq->queue
690 * Returns the request, or null if one could not be allocated
691 *---------------------------------------------------------------------*/
692 static struct usb_request *
693 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
694 {
695 struct fsl_req *req = NULL;
696
697 req = kzalloc(sizeof *req, gfp_flags);
698 if (!req)
699 return NULL;
700
701 req->req.dma = DMA_ADDR_INVALID;
702 INIT_LIST_HEAD(&req->queue);
703
704 return &req->req;
705 }
706
707 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
708 {
709 struct fsl_req *req = NULL;
710
711 req = container_of(_req, struct fsl_req, req);
712
713 if (_req)
714 kfree(req);
715 }
716
717 /* Actually add a dTD chain to an empty dQH and let go */
718 static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
719 {
720 struct ep_queue_head *qh = get_qh_by_ep(ep);
721
722 /* Write dQH next pointer and terminate bit to 0 */
723 qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
724 & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
725
726 /* Clear active and halt bit */
727 qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
728 | EP_QUEUE_HEAD_STATUS_HALT));
729
730 /* Ensure that updates to the QH will occur before priming. */
731 wmb();
732
733 /* Prime endpoint by writing correct bit to ENDPTPRIME */
734 fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
735 : (1 << (ep_index(ep))), &dr_regs->endpointprime);
736 }
737
738 /* Add dTD chain to the dQH of an EP */
739 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
740 {
741 u32 temp, bitmask, tmp_stat;
742
743 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
744 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
745
746 bitmask = ep_is_in(ep)
747 ? (1 << (ep_index(ep) + 16))
748 : (1 << (ep_index(ep)));
749
750 /* check if the pipe is empty */
751 if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
752 /* Add td to the end */
753 struct fsl_req *lastreq;
754 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
755 lastreq->tail->next_td_ptr =
756 cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
757 /* Ensure dTD's next dtd pointer to be updated */
758 wmb();
759 /* Read prime bit, if 1 goto done */
760 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
761 return;
762
763 do {
764 /* Set ATDTW bit in USBCMD */
765 temp = fsl_readl(&dr_regs->usbcmd);
766 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
767
768 /* Read correct status bit */
769 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
770
771 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
772
773 /* Write ATDTW bit to 0 */
774 temp = fsl_readl(&dr_regs->usbcmd);
775 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
776
777 if (tmp_stat)
778 return;
779 }
780
781 fsl_prime_ep(ep, req->head);
782 }
783
784 /* Fill in the dTD structure
785 * @req: request that the transfer belongs to
786 * @length: return actually data length of the dTD
787 * @dma: return dma address of the dTD
788 * @is_last: return flag if it is the last dTD of the request
789 * return: pointer to the built dTD */
790 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
791 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
792 {
793 u32 swap_temp;
794 struct ep_td_struct *dtd;
795
796 /* how big will this transfer be? */
797 *length = min(req->req.length - req->req.actual,
798 (unsigned)EP_MAX_LENGTH_TRANSFER);
799
800 dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
801 if (dtd == NULL)
802 return dtd;
803
804 dtd->td_dma = *dma;
805 /* Clear reserved field */
806 swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
807 swap_temp &= ~DTD_RESERVED_FIELDS;
808 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
809
810 /* Init all of buffer page pointers */
811 swap_temp = (u32) (req->req.dma + req->req.actual);
812 dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
813 dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
814 dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
815 dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
816 dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
817
818 req->req.actual += *length;
819
820 /* zlp is needed if req->req.zero is set */
821 if (req->req.zero) {
822 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
823 *is_last = 1;
824 else
825 *is_last = 0;
826 } else if (req->req.length == req->req.actual)
827 *is_last = 1;
828 else
829 *is_last = 0;
830
831 if ((*is_last) == 0)
832 VDBG("multi-dtd request!");
833 /* Fill in the transfer size; set active bit */
834 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
835
836 /* Enable interrupt for the last dtd of a request */
837 if (*is_last && !req->req.no_interrupt)
838 swap_temp |= DTD_IOC;
839
840 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
841
842 mb();
843
844 VDBG("length = %d address= 0x%x", *length, (int)*dma);
845
846 return dtd;
847 }
848
849 /* Generate dtd chain for a request */
850 static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
851 {
852 unsigned count;
853 int is_last;
854 int is_first =1;
855 struct ep_td_struct *last_dtd = NULL, *dtd;
856 dma_addr_t dma;
857
858 do {
859 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
860 if (dtd == NULL)
861 return -ENOMEM;
862
863 if (is_first) {
864 is_first = 0;
865 req->head = dtd;
866 } else {
867 last_dtd->next_td_ptr = cpu_to_hc32(dma);
868 last_dtd->next_td_virt = dtd;
869 }
870 last_dtd = dtd;
871
872 req->dtd_count++;
873 } while (!is_last);
874
875 dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
876
877 req->tail = dtd;
878
879 return 0;
880 }
881
882 /* queues (submits) an I/O request to an endpoint */
883 static int
884 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
885 {
886 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
887 struct fsl_req *req = container_of(_req, struct fsl_req, req);
888 struct fsl_udc *udc;
889 unsigned long flags;
890
891 /* catch various bogus parameters */
892 if (!_req || !req->req.complete || !req->req.buf
893 || !list_empty(&req->queue)) {
894 VDBG("%s, bad params", __func__);
895 return -EINVAL;
896 }
897 if (unlikely(!_ep || !ep->ep.desc)) {
898 VDBG("%s, bad ep", __func__);
899 return -EINVAL;
900 }
901 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
902 if (req->req.length > ep->ep.maxpacket)
903 return -EMSGSIZE;
904 }
905
906 udc = ep->udc;
907 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
908 return -ESHUTDOWN;
909
910 req->ep = ep;
911
912 /* map virtual address to hardware */
913 if (req->req.dma == DMA_ADDR_INVALID) {
914 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
915 req->req.buf,
916 req->req.length, ep_is_in(ep)
917 ? DMA_TO_DEVICE
918 : DMA_FROM_DEVICE);
919 req->mapped = 1;
920 } else {
921 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
922 req->req.dma, req->req.length,
923 ep_is_in(ep)
924 ? DMA_TO_DEVICE
925 : DMA_FROM_DEVICE);
926 req->mapped = 0;
927 }
928
929 req->req.status = -EINPROGRESS;
930 req->req.actual = 0;
931 req->dtd_count = 0;
932
933 /* build dtds and push them to device queue */
934 if (!fsl_req_to_dtd(req, gfp_flags)) {
935 spin_lock_irqsave(&udc->lock, flags);
936 fsl_queue_td(ep, req);
937 } else {
938 return -ENOMEM;
939 }
940
941 /* irq handler advances the queue */
942 if (req != NULL)
943 list_add_tail(&req->queue, &ep->queue);
944 spin_unlock_irqrestore(&udc->lock, flags);
945
946 return 0;
947 }
948
949 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
950 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
951 {
952 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
953 struct fsl_req *req;
954 unsigned long flags;
955 int ep_num, stopped, ret = 0;
956 u32 epctrl;
957
958 if (!_ep || !_req)
959 return -EINVAL;
960
961 spin_lock_irqsave(&ep->udc->lock, flags);
962 stopped = ep->stopped;
963
964 /* Stop the ep before we deal with the queue */
965 ep->stopped = 1;
966 ep_num = ep_index(ep);
967 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
968 if (ep_is_in(ep))
969 epctrl &= ~EPCTRL_TX_ENABLE;
970 else
971 epctrl &= ~EPCTRL_RX_ENABLE;
972 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
973
974 /* make sure it's actually queued on this endpoint */
975 list_for_each_entry(req, &ep->queue, queue) {
976 if (&req->req == _req)
977 break;
978 }
979 if (&req->req != _req) {
980 ret = -EINVAL;
981 goto out;
982 }
983
984 /* The request is in progress, or completed but not dequeued */
985 if (ep->queue.next == &req->queue) {
986 _req->status = -ECONNRESET;
987 fsl_ep_fifo_flush(_ep); /* flush current transfer */
988
989 /* The request isn't the last request in this ep queue */
990 if (req->queue.next != &ep->queue) {
991 struct fsl_req *next_req;
992
993 next_req = list_entry(req->queue.next, struct fsl_req,
994 queue);
995
996 /* prime with dTD of next request */
997 fsl_prime_ep(ep, next_req->head);
998 }
999 /* The request hasn't been processed, patch up the TD chain */
1000 } else {
1001 struct fsl_req *prev_req;
1002
1003 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
1004 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
1005 }
1006
1007 done(ep, req, -ECONNRESET);
1008
1009 /* Enable EP */
1010 out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
1011 if (ep_is_in(ep))
1012 epctrl |= EPCTRL_TX_ENABLE;
1013 else
1014 epctrl |= EPCTRL_RX_ENABLE;
1015 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
1016 ep->stopped = stopped;
1017
1018 spin_unlock_irqrestore(&ep->udc->lock, flags);
1019 return ret;
1020 }
1021
1022 /*-------------------------------------------------------------------------*/
1023
1024 /*-----------------------------------------------------------------
1025 * modify the endpoint halt feature
1026 * @ep: the non-isochronous endpoint being stalled
1027 * @value: 1--set halt 0--clear halt
1028 * Returns zero, or a negative error code.
1029 *----------------------------------------------------------------*/
1030 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1031 {
1032 struct fsl_ep *ep = NULL;
1033 unsigned long flags = 0;
1034 int status = -EOPNOTSUPP; /* operation not supported */
1035 unsigned char ep_dir = 0, ep_num = 0;
1036 struct fsl_udc *udc = NULL;
1037
1038 ep = container_of(_ep, struct fsl_ep, ep);
1039 udc = ep->udc;
1040 if (!_ep || !ep->ep.desc) {
1041 status = -EINVAL;
1042 goto out;
1043 }
1044
1045 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1046 status = -EOPNOTSUPP;
1047 goto out;
1048 }
1049
1050 /* Attempt to halt IN ep will fail if any transfer requests
1051 * are still queue */
1052 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1053 status = -EAGAIN;
1054 goto out;
1055 }
1056
1057 status = 0;
1058 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1059 ep_num = (unsigned char)(ep_index(ep));
1060 spin_lock_irqsave(&ep->udc->lock, flags);
1061 dr_ep_change_stall(ep_num, ep_dir, value);
1062 spin_unlock_irqrestore(&ep->udc->lock, flags);
1063
1064 if (ep_index(ep) == 0) {
1065 udc->ep0_state = WAIT_FOR_SETUP;
1066 udc->ep0_dir = 0;
1067 }
1068 out:
1069 VDBG(" %s %s halt stat %d", ep->ep.name,
1070 value ? "set" : "clear", status);
1071
1072 return status;
1073 }
1074
1075 static int fsl_ep_fifo_status(struct usb_ep *_ep)
1076 {
1077 struct fsl_ep *ep;
1078 struct fsl_udc *udc;
1079 int size = 0;
1080 u32 bitmask;
1081 struct ep_queue_head *qh;
1082
1083 ep = container_of(_ep, struct fsl_ep, ep);
1084 if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1085 return -ENODEV;
1086
1087 udc = (struct fsl_udc *)ep->udc;
1088
1089 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1090 return -ESHUTDOWN;
1091
1092 qh = get_qh_by_ep(ep);
1093
1094 bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1095 (1 << (ep_index(ep)));
1096
1097 if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1098 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1099 >> DTD_LENGTH_BIT_POS;
1100
1101 pr_debug("%s %u\n", __func__, size);
1102 return size;
1103 }
1104
1105 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1106 {
1107 struct fsl_ep *ep;
1108 int ep_num, ep_dir;
1109 u32 bits;
1110 unsigned long timeout;
1111 #define FSL_UDC_FLUSH_TIMEOUT 1000
1112
1113 if (!_ep) {
1114 return;
1115 } else {
1116 ep = container_of(_ep, struct fsl_ep, ep);
1117 if (!ep->ep.desc)
1118 return;
1119 }
1120 ep_num = ep_index(ep);
1121 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1122
1123 if (ep_num == 0)
1124 bits = (1 << 16) | 1;
1125 else if (ep_dir == USB_SEND)
1126 bits = 1 << (16 + ep_num);
1127 else
1128 bits = 1 << ep_num;
1129
1130 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1131 do {
1132 fsl_writel(bits, &dr_regs->endptflush);
1133
1134 /* Wait until flush complete */
1135 while (fsl_readl(&dr_regs->endptflush)) {
1136 if (time_after(jiffies, timeout)) {
1137 ERR("ep flush timeout\n");
1138 return;
1139 }
1140 cpu_relax();
1141 }
1142 /* See if we need to flush again */
1143 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1144 }
1145
1146 static struct usb_ep_ops fsl_ep_ops = {
1147 .enable = fsl_ep_enable,
1148 .disable = fsl_ep_disable,
1149
1150 .alloc_request = fsl_alloc_request,
1151 .free_request = fsl_free_request,
1152
1153 .queue = fsl_ep_queue,
1154 .dequeue = fsl_ep_dequeue,
1155
1156 .set_halt = fsl_ep_set_halt,
1157 .fifo_status = fsl_ep_fifo_status,
1158 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1159 };
1160
1161 /*-------------------------------------------------------------------------
1162 Gadget Driver Layer Operations
1163 -------------------------------------------------------------------------*/
1164
1165 /*----------------------------------------------------------------------
1166 * Get the current frame number (from DR frame_index Reg )
1167 *----------------------------------------------------------------------*/
1168 static int fsl_get_frame(struct usb_gadget *gadget)
1169 {
1170 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1171 }
1172
1173 /*-----------------------------------------------------------------------
1174 * Tries to wake up the host connected to this gadget
1175 -----------------------------------------------------------------------*/
1176 static int fsl_wakeup(struct usb_gadget *gadget)
1177 {
1178 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1179 u32 portsc;
1180
1181 /* Remote wakeup feature not enabled by host */
1182 if (!udc->remote_wakeup)
1183 return -ENOTSUPP;
1184
1185 portsc = fsl_readl(&dr_regs->portsc1);
1186 /* not suspended? */
1187 if (!(portsc & PORTSCX_PORT_SUSPEND))
1188 return 0;
1189 /* trigger force resume */
1190 portsc |= PORTSCX_PORT_FORCE_RESUME;
1191 fsl_writel(portsc, &dr_regs->portsc1);
1192 return 0;
1193 }
1194
1195 static int can_pullup(struct fsl_udc *udc)
1196 {
1197 return udc->driver && udc->softconnect && udc->vbus_active;
1198 }
1199
1200 /* Notify controller that VBUS is powered, Called by whatever
1201 detects VBUS sessions */
1202 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1203 {
1204 struct fsl_udc *udc;
1205 unsigned long flags;
1206
1207 udc = container_of(gadget, struct fsl_udc, gadget);
1208 spin_lock_irqsave(&udc->lock, flags);
1209 VDBG("VBUS %s", is_active ? "on" : "off");
1210 udc->vbus_active = (is_active != 0);
1211 if (can_pullup(udc))
1212 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1213 &dr_regs->usbcmd);
1214 else
1215 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1216 &dr_regs->usbcmd);
1217 spin_unlock_irqrestore(&udc->lock, flags);
1218 return 0;
1219 }
1220
1221 /* constrain controller's VBUS power usage
1222 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1223 * reporting how much power the device may consume. For example, this
1224 * could affect how quickly batteries are recharged.
1225 *
1226 * Returns zero on success, else negative errno.
1227 */
1228 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1229 {
1230 struct fsl_udc *udc;
1231
1232 udc = container_of(gadget, struct fsl_udc, gadget);
1233 if (!IS_ERR_OR_NULL(udc->transceiver))
1234 return usb_phy_set_power(udc->transceiver, mA);
1235 return -ENOTSUPP;
1236 }
1237
1238 /* Change Data+ pullup status
1239 * this func is used by usb_gadget_connect/disconnet
1240 */
1241 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1242 {
1243 struct fsl_udc *udc;
1244
1245 udc = container_of(gadget, struct fsl_udc, gadget);
1246 udc->softconnect = (is_on != 0);
1247 if (can_pullup(udc))
1248 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1249 &dr_regs->usbcmd);
1250 else
1251 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1252 &dr_regs->usbcmd);
1253
1254 return 0;
1255 }
1256
1257 static int fsl_start(struct usb_gadget_driver *driver,
1258 int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
1259 static int fsl_stop(struct usb_gadget_driver *driver);
1260 /* defined in gadget.h */
1261 static struct usb_gadget_ops fsl_gadget_ops = {
1262 .get_frame = fsl_get_frame,
1263 .wakeup = fsl_wakeup,
1264 /* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1265 .vbus_session = fsl_vbus_session,
1266 .vbus_draw = fsl_vbus_draw,
1267 .pullup = fsl_pullup,
1268 .start = fsl_start,
1269 .stop = fsl_stop,
1270 };
1271
1272 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1273 on new transaction */
1274 static void ep0stall(struct fsl_udc *udc)
1275 {
1276 u32 tmp;
1277
1278 /* must set tx and rx to stall at the same time */
1279 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1280 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1281 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1282 udc->ep0_state = WAIT_FOR_SETUP;
1283 udc->ep0_dir = 0;
1284 }
1285
1286 /* Prime a status phase for ep0 */
1287 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1288 {
1289 struct fsl_req *req = udc->status_req;
1290 struct fsl_ep *ep;
1291
1292 if (direction == EP_DIR_IN)
1293 udc->ep0_dir = USB_DIR_IN;
1294 else
1295 udc->ep0_dir = USB_DIR_OUT;
1296
1297 ep = &udc->eps[0];
1298 if (udc->ep0_state != DATA_STATE_XMIT)
1299 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1300
1301 req->ep = ep;
1302 req->req.length = 0;
1303 req->req.status = -EINPROGRESS;
1304 req->req.actual = 0;
1305 req->req.complete = NULL;
1306 req->dtd_count = 0;
1307
1308 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1309 req->req.buf, req->req.length,
1310 ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1311 req->mapped = 1;
1312
1313 if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1314 fsl_queue_td(ep, req);
1315 else
1316 return -ENOMEM;
1317
1318 list_add_tail(&req->queue, &ep->queue);
1319
1320 return 0;
1321 }
1322
1323 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1324 {
1325 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1326
1327 if (ep->name)
1328 nuke(ep, -ESHUTDOWN);
1329 }
1330
1331 /*
1332 * ch9 Set address
1333 */
1334 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1335 {
1336 /* Save the new address to device struct */
1337 udc->device_address = (u8) value;
1338 /* Update usb state */
1339 udc->usb_state = USB_STATE_ADDRESS;
1340 /* Status phase */
1341 if (ep0_prime_status(udc, EP_DIR_IN))
1342 ep0stall(udc);
1343 }
1344
1345 /*
1346 * ch9 Get status
1347 */
1348 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1349 u16 index, u16 length)
1350 {
1351 u16 tmp = 0; /* Status, cpu endian */
1352 struct fsl_req *req;
1353 struct fsl_ep *ep;
1354
1355 ep = &udc->eps[0];
1356
1357 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1358 /* Get device status */
1359 tmp = 1 << USB_DEVICE_SELF_POWERED;
1360 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1361 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1362 /* Get interface status */
1363 /* We don't have interface information in udc driver */
1364 tmp = 0;
1365 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1366 /* Get endpoint status */
1367 struct fsl_ep *target_ep;
1368
1369 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1370
1371 /* stall if endpoint doesn't exist */
1372 if (!target_ep->ep.desc)
1373 goto stall;
1374 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1375 << USB_ENDPOINT_HALT;
1376 }
1377
1378 udc->ep0_dir = USB_DIR_IN;
1379 /* Borrow the per device status_req */
1380 req = udc->status_req;
1381 /* Fill in the reqest structure */
1382 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1383
1384 req->ep = ep;
1385 req->req.length = 2;
1386 req->req.status = -EINPROGRESS;
1387 req->req.actual = 0;
1388 req->req.complete = NULL;
1389 req->dtd_count = 0;
1390
1391 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1392 req->req.buf, req->req.length,
1393 ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1394 req->mapped = 1;
1395
1396 /* prime the data phase */
1397 if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1398 fsl_queue_td(ep, req);
1399 else /* no mem */
1400 goto stall;
1401
1402 list_add_tail(&req->queue, &ep->queue);
1403 udc->ep0_state = DATA_STATE_XMIT;
1404 if (ep0_prime_status(udc, EP_DIR_OUT))
1405 ep0stall(udc);
1406
1407 return;
1408 stall:
1409 ep0stall(udc);
1410 }
1411
1412 static void setup_received_irq(struct fsl_udc *udc,
1413 struct usb_ctrlrequest *setup)
1414 {
1415 u16 wValue = le16_to_cpu(setup->wValue);
1416 u16 wIndex = le16_to_cpu(setup->wIndex);
1417 u16 wLength = le16_to_cpu(setup->wLength);
1418
1419 udc_reset_ep_queue(udc, 0);
1420
1421 /* We process some stardard setup requests here */
1422 switch (setup->bRequest) {
1423 case USB_REQ_GET_STATUS:
1424 /* Data+Status phase from udc */
1425 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1426 != (USB_DIR_IN | USB_TYPE_STANDARD))
1427 break;
1428 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1429 return;
1430
1431 case USB_REQ_SET_ADDRESS:
1432 /* Status phase from udc */
1433 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1434 | USB_RECIP_DEVICE))
1435 break;
1436 ch9setaddress(udc, wValue, wIndex, wLength);
1437 return;
1438
1439 case USB_REQ_CLEAR_FEATURE:
1440 case USB_REQ_SET_FEATURE:
1441 /* Status phase from udc */
1442 {
1443 int rc = -EOPNOTSUPP;
1444 u16 ptc = 0;
1445
1446 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1447 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1448 int pipe = get_pipe_by_windex(wIndex);
1449 struct fsl_ep *ep;
1450
1451 if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1452 break;
1453 ep = get_ep_by_pipe(udc, pipe);
1454
1455 spin_unlock(&udc->lock);
1456 rc = fsl_ep_set_halt(&ep->ep,
1457 (setup->bRequest == USB_REQ_SET_FEATURE)
1458 ? 1 : 0);
1459 spin_lock(&udc->lock);
1460
1461 } else if ((setup->bRequestType & (USB_RECIP_MASK
1462 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1463 | USB_TYPE_STANDARD)) {
1464 /* Note: The driver has not include OTG support yet.
1465 * This will be set when OTG support is added */
1466 if (wValue == USB_DEVICE_TEST_MODE)
1467 ptc = wIndex >> 8;
1468 else if (gadget_is_otg(&udc->gadget)) {
1469 if (setup->bRequest ==
1470 USB_DEVICE_B_HNP_ENABLE)
1471 udc->gadget.b_hnp_enable = 1;
1472 else if (setup->bRequest ==
1473 USB_DEVICE_A_HNP_SUPPORT)
1474 udc->gadget.a_hnp_support = 1;
1475 else if (setup->bRequest ==
1476 USB_DEVICE_A_ALT_HNP_SUPPORT)
1477 udc->gadget.a_alt_hnp_support = 1;
1478 }
1479 rc = 0;
1480 } else
1481 break;
1482
1483 if (rc == 0) {
1484 if (ep0_prime_status(udc, EP_DIR_IN))
1485 ep0stall(udc);
1486 }
1487 if (ptc) {
1488 u32 tmp;
1489
1490 mdelay(10);
1491 tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1492 fsl_writel(tmp, &dr_regs->portsc1);
1493 printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1494 }
1495
1496 return;
1497 }
1498
1499 default:
1500 break;
1501 }
1502
1503 /* Requests handled by gadget */
1504 if (wLength) {
1505 /* Data phase from gadget, status phase from udc */
1506 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1507 ? USB_DIR_IN : USB_DIR_OUT;
1508 spin_unlock(&udc->lock);
1509 if (udc->driver->setup(&udc->gadget,
1510 &udc->local_setup_buff) < 0)
1511 ep0stall(udc);
1512 spin_lock(&udc->lock);
1513 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1514 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1515 /*
1516 * If the data stage is IN, send status prime immediately.
1517 * See 2.0 Spec chapter 8.5.3.3 for detail.
1518 */
1519 if (udc->ep0_state == DATA_STATE_XMIT)
1520 if (ep0_prime_status(udc, EP_DIR_OUT))
1521 ep0stall(udc);
1522
1523 } else {
1524 /* No data phase, IN status from gadget */
1525 udc->ep0_dir = USB_DIR_IN;
1526 spin_unlock(&udc->lock);
1527 if (udc->driver->setup(&udc->gadget,
1528 &udc->local_setup_buff) < 0)
1529 ep0stall(udc);
1530 spin_lock(&udc->lock);
1531 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1532 }
1533 }
1534
1535 /* Process request for Data or Status phase of ep0
1536 * prime status phase if needed */
1537 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1538 struct fsl_req *req)
1539 {
1540 if (udc->usb_state == USB_STATE_ADDRESS) {
1541 /* Set the new address */
1542 u32 new_address = (u32) udc->device_address;
1543 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1544 &dr_regs->deviceaddr);
1545 }
1546
1547 done(ep0, req, 0);
1548
1549 switch (udc->ep0_state) {
1550 case DATA_STATE_XMIT:
1551 /* already primed at setup_received_irq */
1552 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1553 break;
1554 case DATA_STATE_RECV:
1555 /* send status phase */
1556 if (ep0_prime_status(udc, EP_DIR_IN))
1557 ep0stall(udc);
1558 break;
1559 case WAIT_FOR_OUT_STATUS:
1560 udc->ep0_state = WAIT_FOR_SETUP;
1561 break;
1562 case WAIT_FOR_SETUP:
1563 ERR("Unexpect ep0 packets\n");
1564 break;
1565 default:
1566 ep0stall(udc);
1567 break;
1568 }
1569 }
1570
1571 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1572 * being corrupted by another incoming setup packet */
1573 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1574 {
1575 u32 temp;
1576 struct ep_queue_head *qh;
1577 struct fsl_usb2_platform_data *pdata = udc->pdata;
1578
1579 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1580
1581 /* Clear bit in ENDPTSETUPSTAT */
1582 temp = fsl_readl(&dr_regs->endptsetupstat);
1583 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1584
1585 /* while a hazard exists when setup package arrives */
1586 do {
1587 /* Set Setup Tripwire */
1588 temp = fsl_readl(&dr_regs->usbcmd);
1589 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1590
1591 /* Copy the setup packet to local buffer */
1592 if (pdata->le_setup_buf) {
1593 u32 *p = (u32 *)buffer_ptr;
1594 u32 *s = (u32 *)qh->setup_buffer;
1595
1596 /* Convert little endian setup buffer to CPU endian */
1597 *p++ = le32_to_cpu(*s++);
1598 *p = le32_to_cpu(*s);
1599 } else {
1600 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1601 }
1602 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1603
1604 /* Clear Setup Tripwire */
1605 temp = fsl_readl(&dr_regs->usbcmd);
1606 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1607 }
1608
1609 /* process-ep_req(): free the completed Tds for this req */
1610 static int process_ep_req(struct fsl_udc *udc, int pipe,
1611 struct fsl_req *curr_req)
1612 {
1613 struct ep_td_struct *curr_td;
1614 int td_complete, actual, remaining_length, j, tmp;
1615 int status = 0;
1616 int errors = 0;
1617 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1618 int direction = pipe % 2;
1619
1620 curr_td = curr_req->head;
1621 td_complete = 0;
1622 actual = curr_req->req.length;
1623
1624 for (j = 0; j < curr_req->dtd_count; j++) {
1625 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1626 & DTD_PACKET_SIZE)
1627 >> DTD_LENGTH_BIT_POS;
1628 actual -= remaining_length;
1629
1630 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1631 if (errors & DTD_ERROR_MASK) {
1632 if (errors & DTD_STATUS_HALTED) {
1633 ERR("dTD error %08x QH=%d\n", errors, pipe);
1634 /* Clear the errors and Halt condition */
1635 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1636 tmp &= ~errors;
1637 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1638 status = -EPIPE;
1639 /* FIXME: continue with next queued TD? */
1640
1641 break;
1642 }
1643 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1644 VDBG("Transfer overflow");
1645 status = -EPROTO;
1646 break;
1647 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1648 VDBG("ISO error");
1649 status = -EILSEQ;
1650 break;
1651 } else
1652 ERR("Unknown error has occurred (0x%x)!\n",
1653 errors);
1654
1655 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1656 & DTD_STATUS_ACTIVE) {
1657 VDBG("Request not complete");
1658 status = REQ_UNCOMPLETE;
1659 return status;
1660 } else if (remaining_length) {
1661 if (direction) {
1662 VDBG("Transmit dTD remaining length not zero");
1663 status = -EPROTO;
1664 break;
1665 } else {
1666 td_complete++;
1667 break;
1668 }
1669 } else {
1670 td_complete++;
1671 VDBG("dTD transmitted successful");
1672 }
1673
1674 if (j != curr_req->dtd_count - 1)
1675 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1676 }
1677
1678 if (status)
1679 return status;
1680
1681 curr_req->req.actual = actual;
1682
1683 return 0;
1684 }
1685
1686 /* Process a DTD completion interrupt */
1687 static void dtd_complete_irq(struct fsl_udc *udc)
1688 {
1689 u32 bit_pos;
1690 int i, ep_num, direction, bit_mask, status;
1691 struct fsl_ep *curr_ep;
1692 struct fsl_req *curr_req, *temp_req;
1693
1694 /* Clear the bits in the register */
1695 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1696 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1697
1698 if (!bit_pos)
1699 return;
1700
1701 for (i = 0; i < udc->max_ep; i++) {
1702 ep_num = i >> 1;
1703 direction = i % 2;
1704
1705 bit_mask = 1 << (ep_num + 16 * direction);
1706
1707 if (!(bit_pos & bit_mask))
1708 continue;
1709
1710 curr_ep = get_ep_by_pipe(udc, i);
1711
1712 /* If the ep is configured */
1713 if (curr_ep->name == NULL) {
1714 WARNING("Invalid EP?");
1715 continue;
1716 }
1717
1718 /* process the req queue until an uncomplete request */
1719 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1720 queue) {
1721 status = process_ep_req(udc, i, curr_req);
1722
1723 VDBG("status of process_ep_req= %d, ep = %d",
1724 status, ep_num);
1725 if (status == REQ_UNCOMPLETE)
1726 break;
1727 /* write back status to req */
1728 curr_req->req.status = status;
1729
1730 if (ep_num == 0) {
1731 ep0_req_complete(udc, curr_ep, curr_req);
1732 break;
1733 } else
1734 done(curr_ep, curr_req, status);
1735 }
1736 }
1737 }
1738
1739 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1740 {
1741 switch (reg & PORTSCX_PORT_SPEED_MASK) {
1742 case PORTSCX_PORT_SPEED_HIGH:
1743 return USB_SPEED_HIGH;
1744 case PORTSCX_PORT_SPEED_FULL:
1745 return USB_SPEED_FULL;
1746 case PORTSCX_PORT_SPEED_LOW:
1747 return USB_SPEED_LOW;
1748 default:
1749 return USB_SPEED_UNKNOWN;
1750 }
1751 }
1752
1753 /* Process a port change interrupt */
1754 static void port_change_irq(struct fsl_udc *udc)
1755 {
1756 if (udc->bus_reset)
1757 udc->bus_reset = 0;
1758
1759 /* Bus resetting is finished */
1760 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1761 /* Get the speed */
1762 udc->gadget.speed =
1763 portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1764
1765 /* Update USB state */
1766 if (!udc->resume_state)
1767 udc->usb_state = USB_STATE_DEFAULT;
1768 }
1769
1770 /* Process suspend interrupt */
1771 static void suspend_irq(struct fsl_udc *udc)
1772 {
1773 udc->resume_state = udc->usb_state;
1774 udc->usb_state = USB_STATE_SUSPENDED;
1775
1776 /* report suspend to the driver, serial.c does not support this */
1777 if (udc->driver->suspend)
1778 udc->driver->suspend(&udc->gadget);
1779 }
1780
1781 static void bus_resume(struct fsl_udc *udc)
1782 {
1783 udc->usb_state = udc->resume_state;
1784 udc->resume_state = 0;
1785
1786 /* report resume to the driver, serial.c does not support this */
1787 if (udc->driver->resume)
1788 udc->driver->resume(&udc->gadget);
1789 }
1790
1791 /* Clear up all ep queues */
1792 static int reset_queues(struct fsl_udc *udc)
1793 {
1794 u8 pipe;
1795
1796 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1797 udc_reset_ep_queue(udc, pipe);
1798
1799 /* report disconnect; the driver is already quiesced */
1800 spin_unlock(&udc->lock);
1801 udc->driver->disconnect(&udc->gadget);
1802 spin_lock(&udc->lock);
1803
1804 return 0;
1805 }
1806
1807 /* Process reset interrupt */
1808 static void reset_irq(struct fsl_udc *udc)
1809 {
1810 u32 temp;
1811 unsigned long timeout;
1812
1813 /* Clear the device address */
1814 temp = fsl_readl(&dr_regs->deviceaddr);
1815 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1816
1817 udc->device_address = 0;
1818
1819 /* Clear usb state */
1820 udc->resume_state = 0;
1821 udc->ep0_dir = 0;
1822 udc->ep0_state = WAIT_FOR_SETUP;
1823 udc->remote_wakeup = 0; /* default to 0 on reset */
1824 udc->gadget.b_hnp_enable = 0;
1825 udc->gadget.a_hnp_support = 0;
1826 udc->gadget.a_alt_hnp_support = 0;
1827
1828 /* Clear all the setup token semaphores */
1829 temp = fsl_readl(&dr_regs->endptsetupstat);
1830 fsl_writel(temp, &dr_regs->endptsetupstat);
1831
1832 /* Clear all the endpoint complete status bits */
1833 temp = fsl_readl(&dr_regs->endptcomplete);
1834 fsl_writel(temp, &dr_regs->endptcomplete);
1835
1836 timeout = jiffies + 100;
1837 while (fsl_readl(&dr_regs->endpointprime)) {
1838 /* Wait until all endptprime bits cleared */
1839 if (time_after(jiffies, timeout)) {
1840 ERR("Timeout for reset\n");
1841 break;
1842 }
1843 cpu_relax();
1844 }
1845
1846 /* Write 1s to the flush register */
1847 fsl_writel(0xffffffff, &dr_regs->endptflush);
1848
1849 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1850 VDBG("Bus reset");
1851 /* Bus is reseting */
1852 udc->bus_reset = 1;
1853 /* Reset all the queues, include XD, dTD, EP queue
1854 * head and TR Queue */
1855 reset_queues(udc);
1856 udc->usb_state = USB_STATE_DEFAULT;
1857 } else {
1858 VDBG("Controller reset");
1859 /* initialize usb hw reg except for regs for EP, not
1860 * touch usbintr reg */
1861 dr_controller_setup(udc);
1862
1863 /* Reset all internal used Queues */
1864 reset_queues(udc);
1865
1866 ep0_setup(udc);
1867
1868 /* Enable DR IRQ reg, Set Run bit, change udc state */
1869 dr_controller_run(udc);
1870 udc->usb_state = USB_STATE_ATTACHED;
1871 }
1872 }
1873
1874 /*
1875 * USB device controller interrupt handler
1876 */
1877 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1878 {
1879 struct fsl_udc *udc = _udc;
1880 u32 irq_src;
1881 irqreturn_t status = IRQ_NONE;
1882 unsigned long flags;
1883
1884 /* Disable ISR for OTG host mode */
1885 if (udc->stopped)
1886 return IRQ_NONE;
1887 spin_lock_irqsave(&udc->lock, flags);
1888 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1889 /* Clear notification bits */
1890 fsl_writel(irq_src, &dr_regs->usbsts);
1891
1892 /* VDBG("irq_src [0x%8x]", irq_src); */
1893
1894 /* Need to resume? */
1895 if (udc->usb_state == USB_STATE_SUSPENDED)
1896 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1897 bus_resume(udc);
1898
1899 /* USB Interrupt */
1900 if (irq_src & USB_STS_INT) {
1901 VDBG("Packet int");
1902 /* Setup package, we only support ep0 as control ep */
1903 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1904 tripwire_handler(udc, 0,
1905 (u8 *) (&udc->local_setup_buff));
1906 setup_received_irq(udc, &udc->local_setup_buff);
1907 status = IRQ_HANDLED;
1908 }
1909
1910 /* completion of dtd */
1911 if (fsl_readl(&dr_regs->endptcomplete)) {
1912 dtd_complete_irq(udc);
1913 status = IRQ_HANDLED;
1914 }
1915 }
1916
1917 /* SOF (for ISO transfer) */
1918 if (irq_src & USB_STS_SOF) {
1919 status = IRQ_HANDLED;
1920 }
1921
1922 /* Port Change */
1923 if (irq_src & USB_STS_PORT_CHANGE) {
1924 port_change_irq(udc);
1925 status = IRQ_HANDLED;
1926 }
1927
1928 /* Reset Received */
1929 if (irq_src & USB_STS_RESET) {
1930 VDBG("reset int");
1931 reset_irq(udc);
1932 status = IRQ_HANDLED;
1933 }
1934
1935 /* Sleep Enable (Suspend) */
1936 if (irq_src & USB_STS_SUSPEND) {
1937 suspend_irq(udc);
1938 status = IRQ_HANDLED;
1939 }
1940
1941 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1942 VDBG("Error IRQ %x", irq_src);
1943 }
1944
1945 spin_unlock_irqrestore(&udc->lock, flags);
1946 return status;
1947 }
1948
1949 /*----------------------------------------------------------------*
1950 * Hook to gadget drivers
1951 * Called by initialization code of gadget drivers
1952 *----------------------------------------------------------------*/
1953 static int fsl_start(struct usb_gadget_driver *driver,
1954 int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
1955 {
1956 int retval = -ENODEV;
1957 unsigned long flags = 0;
1958
1959 if (!udc_controller)
1960 return -ENODEV;
1961
1962 if (!driver || driver->max_speed < USB_SPEED_FULL
1963 || !bind || !driver->disconnect || !driver->setup)
1964 return -EINVAL;
1965
1966 if (udc_controller->driver)
1967 return -EBUSY;
1968
1969 /* lock is needed but whether should use this lock or another */
1970 spin_lock_irqsave(&udc_controller->lock, flags);
1971
1972 driver->driver.bus = NULL;
1973 /* hook up the driver */
1974 udc_controller->driver = driver;
1975 udc_controller->gadget.dev.driver = &driver->driver;
1976 spin_unlock_irqrestore(&udc_controller->lock, flags);
1977
1978 /* bind udc driver to gadget driver */
1979 retval = bind(&udc_controller->gadget, driver);
1980 if (retval) {
1981 VDBG("bind to %s --> %d", driver->driver.name, retval);
1982 udc_controller->gadget.dev.driver = NULL;
1983 udc_controller->driver = NULL;
1984 goto out;
1985 }
1986
1987 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1988 /* Suspend the controller until OTG enable it */
1989 udc_controller->stopped = 1;
1990 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1991
1992 /* connect to bus through transceiver */
1993 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1994 retval = otg_set_peripheral(
1995 udc_controller->transceiver->otg,
1996 &udc_controller->gadget);
1997 if (retval < 0) {
1998 ERR("can't bind to transceiver\n");
1999 driver->unbind(&udc_controller->gadget);
2000 udc_controller->gadget.dev.driver = 0;
2001 udc_controller->driver = 0;
2002 return retval;
2003 }
2004 }
2005 } else {
2006 /* Enable DR IRQ reg and set USBCMD reg Run bit */
2007 dr_controller_run(udc_controller);
2008 udc_controller->usb_state = USB_STATE_ATTACHED;
2009 udc_controller->ep0_state = WAIT_FOR_SETUP;
2010 udc_controller->ep0_dir = 0;
2011 }
2012 printk(KERN_INFO "%s: bind to driver %s\n",
2013 udc_controller->gadget.name, driver->driver.name);
2014
2015 out:
2016 if (retval)
2017 printk(KERN_WARNING "gadget driver register failed %d\n",
2018 retval);
2019 return retval;
2020 }
2021
2022 /* Disconnect from gadget driver */
2023 static int fsl_stop(struct usb_gadget_driver *driver)
2024 {
2025 struct fsl_ep *loop_ep;
2026 unsigned long flags;
2027
2028 if (!udc_controller)
2029 return -ENODEV;
2030
2031 if (!driver || driver != udc_controller->driver || !driver->unbind)
2032 return -EINVAL;
2033
2034 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2035 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
2036
2037 /* stop DR, disable intr */
2038 dr_controller_stop(udc_controller);
2039
2040 /* in fact, no needed */
2041 udc_controller->usb_state = USB_STATE_ATTACHED;
2042 udc_controller->ep0_state = WAIT_FOR_SETUP;
2043 udc_controller->ep0_dir = 0;
2044
2045 /* stand operation */
2046 spin_lock_irqsave(&udc_controller->lock, flags);
2047 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2048 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2049 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2050 ep.ep_list)
2051 nuke(loop_ep, -ESHUTDOWN);
2052 spin_unlock_irqrestore(&udc_controller->lock, flags);
2053
2054 /* report disconnect; the controller is already quiesced */
2055 driver->disconnect(&udc_controller->gadget);
2056
2057 /* unbind gadget and unhook driver. */
2058 driver->unbind(&udc_controller->gadget);
2059 udc_controller->gadget.dev.driver = NULL;
2060 udc_controller->driver = NULL;
2061
2062 printk(KERN_WARNING "unregistered gadget driver '%s'\n",
2063 driver->driver.name);
2064 return 0;
2065 }
2066
2067 /*-------------------------------------------------------------------------
2068 PROC File System Support
2069 -------------------------------------------------------------------------*/
2070 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2071
2072 #include <linux/seq_file.h>
2073
2074 static const char proc_filename[] = "driver/fsl_usb2_udc";
2075
2076 static int fsl_proc_read(char *page, char **start, off_t off, int count,
2077 int *eof, void *_dev)
2078 {
2079 char *buf = page;
2080 char *next = buf;
2081 unsigned size = count;
2082 unsigned long flags;
2083 int t, i;
2084 u32 tmp_reg;
2085 struct fsl_ep *ep = NULL;
2086 struct fsl_req *req;
2087
2088 struct fsl_udc *udc = udc_controller;
2089 if (off != 0)
2090 return 0;
2091
2092 spin_lock_irqsave(&udc->lock, flags);
2093
2094 /* ------basic driver information ---- */
2095 t = scnprintf(next, size,
2096 DRIVER_DESC "\n"
2097 "%s version: %s\n"
2098 "Gadget driver: %s\n\n",
2099 driver_name, DRIVER_VERSION,
2100 udc->driver ? udc->driver->driver.name : "(none)");
2101 size -= t;
2102 next += t;
2103
2104 /* ------ DR Registers ----- */
2105 tmp_reg = fsl_readl(&dr_regs->usbcmd);
2106 t = scnprintf(next, size,
2107 "USBCMD reg:\n"
2108 "SetupTW: %d\n"
2109 "Run/Stop: %s\n\n",
2110 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2111 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2112 size -= t;
2113 next += t;
2114
2115 tmp_reg = fsl_readl(&dr_regs->usbsts);
2116 t = scnprintf(next, size,
2117 "USB Status Reg:\n"
2118 "Dr Suspend: %d Reset Received: %d System Error: %s "
2119 "USB Error Interrupt: %s\n\n",
2120 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2121 (tmp_reg & USB_STS_RESET) ? 1 : 0,
2122 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2123 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2124 size -= t;
2125 next += t;
2126
2127 tmp_reg = fsl_readl(&dr_regs->usbintr);
2128 t = scnprintf(next, size,
2129 "USB Intrrupt Enable Reg:\n"
2130 "Sleep Enable: %d SOF Received Enable: %d "
2131 "Reset Enable: %d\n"
2132 "System Error Enable: %d "
2133 "Port Change Dectected Enable: %d\n"
2134 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2135 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2136 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2137 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2138 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2139 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2140 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2141 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2142 size -= t;
2143 next += t;
2144
2145 tmp_reg = fsl_readl(&dr_regs->frindex);
2146 t = scnprintf(next, size,
2147 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2148 (tmp_reg & USB_FRINDEX_MASKS));
2149 size -= t;
2150 next += t;
2151
2152 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2153 t = scnprintf(next, size,
2154 "USB Device Address Reg: Device Addr is 0x%x\n\n",
2155 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2156 size -= t;
2157 next += t;
2158
2159 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2160 t = scnprintf(next, size,
2161 "USB Endpoint List Address Reg: "
2162 "Device Addr is 0x%x\n\n",
2163 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2164 size -= t;
2165 next += t;
2166
2167 tmp_reg = fsl_readl(&dr_regs->portsc1);
2168 t = scnprintf(next, size,
2169 "USB Port Status&Control Reg:\n"
2170 "Port Transceiver Type : %s Port Speed: %s\n"
2171 "PHY Low Power Suspend: %s Port Reset: %s "
2172 "Port Suspend Mode: %s\n"
2173 "Over-current Change: %s "
2174 "Port Enable/Disable Change: %s\n"
2175 "Port Enabled/Disabled: %s "
2176 "Current Connect Status: %s\n\n", ( {
2177 char *s;
2178 switch (tmp_reg & PORTSCX_PTS_FSLS) {
2179 case PORTSCX_PTS_UTMI:
2180 s = "UTMI"; break;
2181 case PORTSCX_PTS_ULPI:
2182 s = "ULPI "; break;
2183 case PORTSCX_PTS_FSLS:
2184 s = "FS/LS Serial"; break;
2185 default:
2186 s = "None"; break;
2187 }
2188 s;} ),
2189 usb_speed_string(portscx_device_speed(tmp_reg)),
2190 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2191 "Normal PHY mode" : "Low power mode",
2192 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2193 "Not in Reset",
2194 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2195 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2196 "No",
2197 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2198 "Not change",
2199 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2200 "Not correct",
2201 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2202 "Attached" : "Not-Att");
2203 size -= t;
2204 next += t;
2205
2206 tmp_reg = fsl_readl(&dr_regs->usbmode);
2207 t = scnprintf(next, size,
2208 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2209 char *s;
2210 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2211 case USB_MODE_CTRL_MODE_IDLE:
2212 s = "Idle"; break;
2213 case USB_MODE_CTRL_MODE_DEVICE:
2214 s = "Device Controller"; break;
2215 case USB_MODE_CTRL_MODE_HOST:
2216 s = "Host Controller"; break;
2217 default:
2218 s = "None"; break;
2219 }
2220 s;
2221 } ));
2222 size -= t;
2223 next += t;
2224
2225 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2226 t = scnprintf(next, size,
2227 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2228 (tmp_reg & EP_SETUP_STATUS_MASK));
2229 size -= t;
2230 next += t;
2231
2232 for (i = 0; i < udc->max_ep / 2; i++) {
2233 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2234 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2235 i, tmp_reg);
2236 size -= t;
2237 next += t;
2238 }
2239 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2240 t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2241 size -= t;
2242 next += t;
2243
2244 #ifndef CONFIG_ARCH_MXC
2245 if (udc->pdata->have_sysif_regs) {
2246 tmp_reg = usb_sys_regs->snoop1;
2247 t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2248 size -= t;
2249 next += t;
2250
2251 tmp_reg = usb_sys_regs->control;
2252 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2253 tmp_reg);
2254 size -= t;
2255 next += t;
2256 }
2257 #endif
2258
2259 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2260 ep = &udc->eps[0];
2261 t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2262 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2263 size -= t;
2264 next += t;
2265
2266 if (list_empty(&ep->queue)) {
2267 t = scnprintf(next, size, "its req queue is empty\n\n");
2268 size -= t;
2269 next += t;
2270 } else {
2271 list_for_each_entry(req, &ep->queue, queue) {
2272 t = scnprintf(next, size,
2273 "req %p actual 0x%x length 0x%x buf %p\n",
2274 &req->req, req->req.actual,
2275 req->req.length, req->req.buf);
2276 size -= t;
2277 next += t;
2278 }
2279 }
2280 /* other gadget->eplist ep */
2281 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2282 if (ep->ep.desc) {
2283 t = scnprintf(next, size,
2284 "\nFor %s Maxpkt is 0x%x "
2285 "index is 0x%x\n",
2286 ep->ep.name, ep_maxpacket(ep),
2287 ep_index(ep));
2288 size -= t;
2289 next += t;
2290
2291 if (list_empty(&ep->queue)) {
2292 t = scnprintf(next, size,
2293 "its req queue is empty\n\n");
2294 size -= t;
2295 next += t;
2296 } else {
2297 list_for_each_entry(req, &ep->queue, queue) {
2298 t = scnprintf(next, size,
2299 "req %p actual 0x%x length "
2300 "0x%x buf %p\n",
2301 &req->req, req->req.actual,
2302 req->req.length, req->req.buf);
2303 size -= t;
2304 next += t;
2305 } /* end for each_entry of ep req */
2306 } /* end for else */
2307 } /* end for if(ep->queue) */
2308 } /* end (ep->desc) */
2309
2310 spin_unlock_irqrestore(&udc->lock, flags);
2311
2312 *eof = 1;
2313 return count - size;
2314 }
2315
2316 #define create_proc_file() create_proc_read_entry(proc_filename, \
2317 0, NULL, fsl_proc_read, NULL)
2318
2319 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2320
2321 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2322
2323 #define create_proc_file() do {} while (0)
2324 #define remove_proc_file() do {} while (0)
2325
2326 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2327
2328 /*-------------------------------------------------------------------------*/
2329
2330 /* Release udc structures */
2331 static void fsl_udc_release(struct device *dev)
2332 {
2333 complete(udc_controller->done);
2334 dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2335 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2336 kfree(udc_controller);
2337 }
2338
2339 /******************************************************************
2340 Internal structure setup functions
2341 *******************************************************************/
2342 /*------------------------------------------------------------------
2343 * init resource for globle controller
2344 * Return the udc handle on success or NULL on failure
2345 ------------------------------------------------------------------*/
2346 static int __init struct_udc_setup(struct fsl_udc *udc,
2347 struct platform_device *pdev)
2348 {
2349 struct fsl_usb2_platform_data *pdata;
2350 size_t size;
2351
2352 pdata = pdev->dev.platform_data;
2353 udc->phy_mode = pdata->phy_mode;
2354
2355 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2356 if (!udc->eps) {
2357 ERR("malloc fsl_ep failed\n");
2358 return -1;
2359 }
2360
2361 /* initialized QHs, take care of alignment */
2362 size = udc->max_ep * sizeof(struct ep_queue_head);
2363 if (size < QH_ALIGNMENT)
2364 size = QH_ALIGNMENT;
2365 else if ((size % QH_ALIGNMENT) != 0) {
2366 size += QH_ALIGNMENT + 1;
2367 size &= ~(QH_ALIGNMENT - 1);
2368 }
2369 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2370 &udc->ep_qh_dma, GFP_KERNEL);
2371 if (!udc->ep_qh) {
2372 ERR("malloc QHs for udc failed\n");
2373 kfree(udc->eps);
2374 return -1;
2375 }
2376
2377 udc->ep_qh_size = size;
2378
2379 /* Initialize ep0 status request structure */
2380 /* FIXME: fsl_alloc_request() ignores ep argument */
2381 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2382 struct fsl_req, req);
2383 /* allocate a small amount of memory to get valid address */
2384 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2385
2386 udc->resume_state = USB_STATE_NOTATTACHED;
2387 udc->usb_state = USB_STATE_POWERED;
2388 udc->ep0_dir = 0;
2389 udc->remote_wakeup = 0; /* default to 0 on reset */
2390
2391 return 0;
2392 }
2393
2394 /*----------------------------------------------------------------
2395 * Setup the fsl_ep struct for eps
2396 * Link fsl_ep->ep to gadget->ep_list
2397 * ep0out is not used so do nothing here
2398 * ep0in should be taken care
2399 *--------------------------------------------------------------*/
2400 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2401 char *name, int link)
2402 {
2403 struct fsl_ep *ep = &udc->eps[index];
2404
2405 ep->udc = udc;
2406 strcpy(ep->name, name);
2407 ep->ep.name = ep->name;
2408
2409 ep->ep.ops = &fsl_ep_ops;
2410 ep->stopped = 0;
2411
2412 /* for ep0: maxP defined in desc
2413 * for other eps, maxP is set by epautoconfig() called by gadget layer
2414 */
2415 ep->ep.maxpacket = (unsigned short) ~0;
2416
2417 /* the queue lists any req for this ep */
2418 INIT_LIST_HEAD(&ep->queue);
2419
2420 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2421 if (link)
2422 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2423 ep->gadget = &udc->gadget;
2424 ep->qh = &udc->ep_qh[index];
2425
2426 return 0;
2427 }
2428
2429 /* Driver probe function
2430 * all intialization operations implemented here except enabling usb_intr reg
2431 * board setup should have been done in the platform code
2432 */
2433 static int __init fsl_udc_probe(struct platform_device *pdev)
2434 {
2435 struct fsl_usb2_platform_data *pdata;
2436 struct resource *res;
2437 int ret = -ENODEV;
2438 unsigned int i;
2439 u32 dccparams;
2440
2441 if (strcmp(pdev->name, driver_name)) {
2442 VDBG("Wrong device");
2443 return -ENODEV;
2444 }
2445
2446 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2447 if (udc_controller == NULL) {
2448 ERR("malloc udc failed\n");
2449 return -ENOMEM;
2450 }
2451
2452 pdata = pdev->dev.platform_data;
2453 udc_controller->pdata = pdata;
2454 spin_lock_init(&udc_controller->lock);
2455 udc_controller->stopped = 1;
2456
2457 #ifdef CONFIG_USB_OTG
2458 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2459 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2460 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2461 ERR("Can't find OTG driver!\n");
2462 ret = -ENODEV;
2463 goto err_kfree;
2464 }
2465 }
2466 #endif
2467
2468 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2469 if (!res) {
2470 ret = -ENXIO;
2471 goto err_kfree;
2472 }
2473
2474 if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2475 if (!request_mem_region(res->start, resource_size(res),
2476 driver_name)) {
2477 ERR("request mem region for %s failed\n", pdev->name);
2478 ret = -EBUSY;
2479 goto err_kfree;
2480 }
2481 }
2482
2483 dr_regs = ioremap(res->start, resource_size(res));
2484 if (!dr_regs) {
2485 ret = -ENOMEM;
2486 goto err_release_mem_region;
2487 }
2488
2489 pdata->regs = (void *)dr_regs;
2490
2491 /*
2492 * do platform specific init: check the clock, grab/config pins, etc.
2493 */
2494 if (pdata->init && pdata->init(pdev)) {
2495 ret = -ENODEV;
2496 goto err_iounmap_noclk;
2497 }
2498
2499 /* Set accessors only after pdata->init() ! */
2500 fsl_set_accessors(pdata);
2501
2502 #ifndef CONFIG_ARCH_MXC
2503 if (pdata->have_sysif_regs)
2504 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2505 #endif
2506
2507 /* Initialize USB clocks */
2508 ret = fsl_udc_clk_init(pdev);
2509 if (ret < 0)
2510 goto err_iounmap_noclk;
2511
2512 /* Read Device Controller Capability Parameters register */
2513 dccparams = fsl_readl(&dr_regs->dccparams);
2514 if (!(dccparams & DCCPARAMS_DC)) {
2515 ERR("This SOC doesn't support device role\n");
2516 ret = -ENODEV;
2517 goto err_iounmap;
2518 }
2519 /* Get max device endpoints */
2520 /* DEN is bidirectional ep number, max_ep doubles the number */
2521 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2522
2523 udc_controller->irq = platform_get_irq(pdev, 0);
2524 if (!udc_controller->irq) {
2525 ret = -ENODEV;
2526 goto err_iounmap;
2527 }
2528
2529 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2530 driver_name, udc_controller);
2531 if (ret != 0) {
2532 ERR("cannot request irq %d err %d\n",
2533 udc_controller->irq, ret);
2534 goto err_iounmap;
2535 }
2536
2537 /* Initialize the udc structure including QH member and other member */
2538 if (struct_udc_setup(udc_controller, pdev)) {
2539 ERR("Can't initialize udc data structure\n");
2540 ret = -ENOMEM;
2541 goto err_free_irq;
2542 }
2543
2544 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2545 /* initialize usb hw reg except for regs for EP,
2546 * leave usbintr reg untouched */
2547 dr_controller_setup(udc_controller);
2548 }
2549
2550 fsl_udc_clk_finalize(pdev);
2551
2552 /* Setup gadget structure */
2553 udc_controller->gadget.ops = &fsl_gadget_ops;
2554 udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2555 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2556 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2557 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2558 udc_controller->gadget.name = driver_name;
2559
2560 /* Setup gadget.dev and register with kernel */
2561 dev_set_name(&udc_controller->gadget.dev, "gadget");
2562 udc_controller->gadget.dev.release = fsl_udc_release;
2563 udc_controller->gadget.dev.parent = &pdev->dev;
2564 udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2565 ret = device_register(&udc_controller->gadget.dev);
2566 if (ret < 0)
2567 goto err_free_irq;
2568
2569 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2570 udc_controller->gadget.is_otg = 1;
2571
2572 /* setup QH and epctrl for ep0 */
2573 ep0_setup(udc_controller);
2574
2575 /* setup udc->eps[] for ep0 */
2576 struct_ep_setup(udc_controller, 0, "ep0", 0);
2577 /* for ep0: the desc defined here;
2578 * for other eps, gadget layer called ep_enable with defined desc
2579 */
2580 udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2581 udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2582
2583 /* setup the udc->eps[] for non-control endpoints and link
2584 * to gadget.ep_list */
2585 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2586 char name[14];
2587
2588 sprintf(name, "ep%dout", i);
2589 struct_ep_setup(udc_controller, i * 2, name, 1);
2590 sprintf(name, "ep%din", i);
2591 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2592 }
2593
2594 /* use dma_pool for TD management */
2595 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2596 sizeof(struct ep_td_struct),
2597 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2598 if (udc_controller->td_pool == NULL) {
2599 ret = -ENOMEM;
2600 goto err_unregister;
2601 }
2602
2603 ret = usb_add_gadget_udc(&pdev->dev, &udc_controller->gadget);
2604 if (ret)
2605 goto err_del_udc;
2606
2607 create_proc_file();
2608 return 0;
2609
2610 err_del_udc:
2611 dma_pool_destroy(udc_controller->td_pool);
2612 err_unregister:
2613 device_unregister(&udc_controller->gadget.dev);
2614 err_free_irq:
2615 free_irq(udc_controller->irq, udc_controller);
2616 err_iounmap:
2617 if (pdata->exit)
2618 pdata->exit(pdev);
2619 fsl_udc_clk_release();
2620 err_iounmap_noclk:
2621 iounmap(dr_regs);
2622 err_release_mem_region:
2623 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2624 release_mem_region(res->start, resource_size(res));
2625 err_kfree:
2626 kfree(udc_controller);
2627 udc_controller = NULL;
2628 return ret;
2629 }
2630
2631 /* Driver removal function
2632 * Free resources and finish pending transactions
2633 */
2634 static int __exit fsl_udc_remove(struct platform_device *pdev)
2635 {
2636 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2637 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
2638
2639 DECLARE_COMPLETION(done);
2640
2641 if (!udc_controller)
2642 return -ENODEV;
2643
2644 usb_del_gadget_udc(&udc_controller->gadget);
2645 udc_controller->done = &done;
2646
2647 fsl_udc_clk_release();
2648
2649 /* DR has been stopped in usb_gadget_unregister_driver() */
2650 remove_proc_file();
2651
2652 /* Free allocated memory */
2653 kfree(udc_controller->status_req->req.buf);
2654 kfree(udc_controller->status_req);
2655 kfree(udc_controller->eps);
2656
2657 dma_pool_destroy(udc_controller->td_pool);
2658 free_irq(udc_controller->irq, udc_controller);
2659 iounmap(dr_regs);
2660 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2661 release_mem_region(res->start, resource_size(res));
2662
2663 device_unregister(&udc_controller->gadget.dev);
2664 /* free udc --wait for the release() finished */
2665 wait_for_completion(&done);
2666
2667 /*
2668 * do platform specific un-initialization:
2669 * release iomux pins, etc.
2670 */
2671 if (pdata->exit)
2672 pdata->exit(pdev);
2673
2674 return 0;
2675 }
2676
2677 /*-----------------------------------------------------------------
2678 * Modify Power management attributes
2679 * Used by OTG statemachine to disable gadget temporarily
2680 -----------------------------------------------------------------*/
2681 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2682 {
2683 dr_controller_stop(udc_controller);
2684 return 0;
2685 }
2686
2687 /*-----------------------------------------------------------------
2688 * Invoked on USB resume. May be called in_interrupt.
2689 * Here we start the DR controller and enable the irq
2690 *-----------------------------------------------------------------*/
2691 static int fsl_udc_resume(struct platform_device *pdev)
2692 {
2693 /* Enable DR irq reg and set controller Run */
2694 if (udc_controller->stopped) {
2695 dr_controller_setup(udc_controller);
2696 dr_controller_run(udc_controller);
2697 }
2698 udc_controller->usb_state = USB_STATE_ATTACHED;
2699 udc_controller->ep0_state = WAIT_FOR_SETUP;
2700 udc_controller->ep0_dir = 0;
2701 return 0;
2702 }
2703
2704 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2705 {
2706 struct fsl_udc *udc = udc_controller;
2707 u32 mode, usbcmd;
2708
2709 mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2710
2711 pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2712
2713 /*
2714 * If the controller is already stopped, then this must be a
2715 * PM suspend. Remember this fact, so that we will leave the
2716 * controller stopped at PM resume time.
2717 */
2718 if (udc->stopped) {
2719 pr_debug("gadget already stopped, leaving early\n");
2720 udc->already_stopped = 1;
2721 return 0;
2722 }
2723
2724 if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2725 pr_debug("gadget not in device mode, leaving early\n");
2726 return 0;
2727 }
2728
2729 /* stop the controller */
2730 usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2731 fsl_writel(usbcmd, &dr_regs->usbcmd);
2732
2733 udc->stopped = 1;
2734
2735 pr_info("USB Gadget suspended\n");
2736
2737 return 0;
2738 }
2739
2740 static int fsl_udc_otg_resume(struct device *dev)
2741 {
2742 pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
2743 udc_controller->stopped, udc_controller->already_stopped);
2744
2745 /*
2746 * If the controller was stopped at suspend time, then
2747 * don't resume it now.
2748 */
2749 if (udc_controller->already_stopped) {
2750 udc_controller->already_stopped = 0;
2751 pr_debug("gadget was already stopped, leaving early\n");
2752 return 0;
2753 }
2754
2755 pr_info("USB Gadget resume\n");
2756
2757 return fsl_udc_resume(NULL);
2758 }
2759
2760 /*-------------------------------------------------------------------------
2761 Register entry point for the peripheral controller driver
2762 --------------------------------------------------------------------------*/
2763
2764 static struct platform_driver udc_driver = {
2765 .remove = __exit_p(fsl_udc_remove),
2766 /* these suspend and resume are not usb suspend and resume */
2767 .suspend = fsl_udc_suspend,
2768 .resume = fsl_udc_resume,
2769 .driver = {
2770 .name = (char *)driver_name,
2771 .owner = THIS_MODULE,
2772 /* udc suspend/resume called from OTG driver */
2773 .suspend = fsl_udc_otg_suspend,
2774 .resume = fsl_udc_otg_resume,
2775 },
2776 };
2777
2778 static int __init udc_init(void)
2779 {
2780 printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2781 return platform_driver_probe(&udc_driver, fsl_udc_probe);
2782 }
2783
2784 module_init(udc_init);
2785
2786 static void __exit udc_exit(void)
2787 {
2788 platform_driver_unregister(&udc_driver);
2789 printk(KERN_WARNING "%s unregistered\n", driver_desc);
2790 }
2791
2792 module_exit(udc_exit);
2793
2794 MODULE_DESCRIPTION(DRIVER_DESC);
2795 MODULE_AUTHOR(DRIVER_AUTHOR);
2796 MODULE_LICENSE("GPL");
2797 MODULE_ALIAS("platform:fsl-usb2-udc");
Ubuntu Artful kernel mirror