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