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 #include <linux/of_device.h>
45
46 #include <asm/byteorder.h>
47 #include <asm/io.h>
48 #include <asm/unaligned.h>
49 #include <asm/dma.h>
50
51 #include "fsl_usb2_udc.h"
52
53 #define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver"
54 #define DRIVER_AUTHOR "Li Yang/Jiang Bo"
55 #define DRIVER_VERSION "Apr 20, 2007"
56
57 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
58
59 static const char driver_name[] = "fsl-usb2-udc";
60 static const char driver_desc[] = DRIVER_DESC;
61
62 static struct usb_dr_device __iomem *dr_regs;
63
64 static struct usb_sys_interface __iomem *usb_sys_regs;
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 __releases(ep->udc->lock)
163 __acquires(ep->udc->lock)
164 {
165 struct fsl_udc *udc = NULL;
166 unsigned char stopped = ep->stopped;
167 struct ep_td_struct *curr_td, *next_td;
168 int j;
169
170 udc = (struct fsl_udc *)ep->udc;
171 /* Removed the req from fsl_ep->queue */
172 list_del_init(&req->queue);
173
174 /* req.status should be set as -EINPROGRESS in ep_queue() */
175 if (req->req.status == -EINPROGRESS)
176 req->req.status = status;
177 else
178 status = req->req.status;
179
180 /* Free dtd for the request */
181 next_td = req->head;
182 for (j = 0; j < req->dtd_count; j++) {
183 curr_td = next_td;
184 if (j != req->dtd_count - 1) {
185 next_td = curr_td->next_td_virt;
186 }
187 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
188 }
189
190 usb_gadget_unmap_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
191
192 if (status && (status != -ESHUTDOWN))
193 VDBG("complete %s req %p stat %d len %u/%u",
194 ep->ep.name, &req->req, status,
195 req->req.actual, req->req.length);
196
197 ep->stopped = 1;
198
199 spin_unlock(&ep->udc->lock);
200
201 usb_gadget_giveback_request(&ep->ep, &req->req);
202
203 spin_lock(&ep->udc->lock);
204 ep->stopped = stopped;
205 }
206
207 /*-----------------------------------------------------------------
208 * nuke(): delete all requests related to this ep
209 * called with spinlock held
210 *--------------------------------------------------------------*/
nuke(struct fsl_ep * ep,int status)211 static void nuke(struct fsl_ep *ep, int status)
212 {
213 ep->stopped = 1;
214
215 /* Flush fifo */
216 fsl_ep_fifo_flush(&ep->ep);
217
218 /* Whether this eq has request linked */
219 while (!list_empty(&ep->queue)) {
220 struct fsl_req *req = NULL;
221
222 req = list_entry(ep->queue.next, struct fsl_req, queue);
223 done(ep, req, status);
224 }
225 }
226
227 /*------------------------------------------------------------------
228 Internal Hardware related function
229 ------------------------------------------------------------------*/
230
dr_controller_setup(struct fsl_udc * udc)231 static int dr_controller_setup(struct fsl_udc *udc)
232 {
233 unsigned int tmp, portctrl, ep_num;
234 unsigned int max_no_of_ep;
235 unsigned int ctrl;
236 unsigned long timeout;
237
238 #define FSL_UDC_RESET_TIMEOUT 1000
239
240 /* Config PHY interface */
241 portctrl = fsl_readl(&dr_regs->portsc1);
242 portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
243 switch (udc->phy_mode) {
244 case FSL_USB2_PHY_ULPI:
245 if (udc->pdata->have_sysif_regs) {
246 if (udc->pdata->controller_ver) {
247 /* controller version 1.6 or above */
248 ctrl = __raw_readl(&usb_sys_regs->control);
249 ctrl &= ~USB_CTRL_UTMI_PHY_EN;
250 ctrl |= USB_CTRL_USB_EN;
251 __raw_writel(ctrl, &usb_sys_regs->control);
252 }
253 }
254 portctrl |= PORTSCX_PTS_ULPI;
255 break;
256 case FSL_USB2_PHY_UTMI_WIDE:
257 portctrl |= PORTSCX_PTW_16BIT;
258 /* fall through */
259 case FSL_USB2_PHY_UTMI:
260 if (udc->pdata->have_sysif_regs) {
261 if (udc->pdata->controller_ver) {
262 /* controller version 1.6 or above */
263 ctrl = __raw_readl(&usb_sys_regs->control);
264 ctrl |= (USB_CTRL_UTMI_PHY_EN |
265 USB_CTRL_USB_EN);
266 __raw_writel(ctrl, &usb_sys_regs->control);
267 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
268 PHY CLK to become stable - 10ms*/
269 }
270 }
271 portctrl |= PORTSCX_PTS_UTMI;
272 break;
273 case FSL_USB2_PHY_SERIAL:
274 portctrl |= PORTSCX_PTS_FSLS;
275 break;
276 default:
277 return -EINVAL;
278 }
279 fsl_writel(portctrl, &dr_regs->portsc1);
280
281 /* Stop and reset the usb controller */
282 tmp = fsl_readl(&dr_regs->usbcmd);
283 tmp &= ~USB_CMD_RUN_STOP;
284 fsl_writel(tmp, &dr_regs->usbcmd);
285
286 tmp = fsl_readl(&dr_regs->usbcmd);
287 tmp |= USB_CMD_CTRL_RESET;
288 fsl_writel(tmp, &dr_regs->usbcmd);
289
290 /* Wait for reset to complete */
291 timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
292 while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
293 if (time_after(jiffies, timeout)) {
294 ERR("udc reset timeout!\n");
295 return -ETIMEDOUT;
296 }
297 cpu_relax();
298 }
299
300 /* Set the controller as device mode */
301 tmp = fsl_readl(&dr_regs->usbmode);
302 tmp &= ~USB_MODE_CTRL_MODE_MASK; /* clear mode bits */
303 tmp |= USB_MODE_CTRL_MODE_DEVICE;
304 /* Disable Setup Lockout */
305 tmp |= USB_MODE_SETUP_LOCK_OFF;
306 if (udc->pdata->es)
307 tmp |= USB_MODE_ES;
308 fsl_writel(tmp, &dr_regs->usbmode);
309
310 /* Clear the setup status */
311 fsl_writel(0, &dr_regs->usbsts);
312
313 tmp = udc->ep_qh_dma;
314 tmp &= USB_EP_LIST_ADDRESS_MASK;
315 fsl_writel(tmp, &dr_regs->endpointlistaddr);
316
317 VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
318 udc->ep_qh, (int)tmp,
319 fsl_readl(&dr_regs->endpointlistaddr));
320
321 max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
322 for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
323 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
324 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
325 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
326 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
327 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
328 }
329 /* Config control enable i/o output, cpu endian register */
330 #ifndef CONFIG_ARCH_MXC
331 if (udc->pdata->have_sysif_regs) {
332 ctrl = __raw_readl(&usb_sys_regs->control);
333 ctrl |= USB_CTRL_IOENB;
334 __raw_writel(ctrl, &usb_sys_regs->control);
335 }
336 #endif
337
338 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
339 /* Turn on cache snooping hardware, since some PowerPC platforms
340 * wholly rely on hardware to deal with cache coherent. */
341
342 if (udc->pdata->have_sysif_regs) {
343 /* Setup Snooping for all the 4GB space */
344 tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
345 __raw_writel(tmp, &usb_sys_regs->snoop1);
346 tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
347 __raw_writel(tmp, &usb_sys_regs->snoop2);
348 }
349 #endif
350
351 return 0;
352 }
353
354 /* Enable DR irq and set controller to run state */
dr_controller_run(struct fsl_udc * udc)355 static void dr_controller_run(struct fsl_udc *udc)
356 {
357 u32 temp;
358
359 /* Enable DR irq reg */
360 temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
361 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
362 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
363
364 fsl_writel(temp, &dr_regs->usbintr);
365
366 /* Clear stopped bit */
367 udc->stopped = 0;
368
369 /* Set the controller as device mode */
370 temp = fsl_readl(&dr_regs->usbmode);
371 temp |= USB_MODE_CTRL_MODE_DEVICE;
372 fsl_writel(temp, &dr_regs->usbmode);
373
374 /* Set controller to Run */
375 temp = fsl_readl(&dr_regs->usbcmd);
376 temp |= USB_CMD_RUN_STOP;
377 fsl_writel(temp, &dr_regs->usbcmd);
378 }
379
dr_controller_stop(struct fsl_udc * udc)380 static void dr_controller_stop(struct fsl_udc *udc)
381 {
382 unsigned int tmp;
383
384 pr_debug("%s\n", __func__);
385
386 /* if we're in OTG mode, and the Host is currently using the port,
387 * stop now and don't rip the controller out from under the
388 * ehci driver
389 */
390 if (udc->gadget.is_otg) {
391 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
392 pr_debug("udc: Leaving early\n");
393 return;
394 }
395 }
396
397 /* disable all INTR */
398 fsl_writel(0, &dr_regs->usbintr);
399
400 /* Set stopped bit for isr */
401 udc->stopped = 1;
402
403 /* disable IO output */
404 /* usb_sys_regs->control = 0; */
405
406 /* set controller to Stop */
407 tmp = fsl_readl(&dr_regs->usbcmd);
408 tmp &= ~USB_CMD_RUN_STOP;
409 fsl_writel(tmp, &dr_regs->usbcmd);
410 }
411
dr_ep_setup(unsigned char ep_num,unsigned char dir,unsigned char ep_type)412 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
413 unsigned char ep_type)
414 {
415 unsigned int tmp_epctrl = 0;
416
417 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
418 if (dir) {
419 if (ep_num)
420 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
421 tmp_epctrl |= EPCTRL_TX_ENABLE;
422 tmp_epctrl &= ~EPCTRL_TX_TYPE;
423 tmp_epctrl |= ((unsigned int)(ep_type)
424 << EPCTRL_TX_EP_TYPE_SHIFT);
425 } else {
426 if (ep_num)
427 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
428 tmp_epctrl |= EPCTRL_RX_ENABLE;
429 tmp_epctrl &= ~EPCTRL_RX_TYPE;
430 tmp_epctrl |= ((unsigned int)(ep_type)
431 << EPCTRL_RX_EP_TYPE_SHIFT);
432 }
433
434 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
435 }
436
437 static void
dr_ep_change_stall(unsigned char ep_num,unsigned char dir,int value)438 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
439 {
440 u32 tmp_epctrl = 0;
441
442 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
443
444 if (value) {
445 /* set the stall bit */
446 if (dir)
447 tmp_epctrl |= EPCTRL_TX_EP_STALL;
448 else
449 tmp_epctrl |= EPCTRL_RX_EP_STALL;
450 } else {
451 /* clear the stall bit and reset data toggle */
452 if (dir) {
453 tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
454 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
455 } else {
456 tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
457 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
458 }
459 }
460 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
461 }
462
463 /* Get stall status of a specific ep
464 Return: 0: not stalled; 1:stalled */
dr_ep_get_stall(unsigned char ep_num,unsigned char dir)465 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
466 {
467 u32 epctrl;
468
469 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
470 if (dir)
471 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
472 else
473 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
474 }
475
476 /********************************************************************
477 Internal Structure Build up functions
478 ********************************************************************/
479
480 /*------------------------------------------------------------------
481 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
482 * @zlt: Zero Length Termination Select (1: disable; 0: enable)
483 * @mult: Mult field
484 ------------------------------------------------------------------*/
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)485 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
486 unsigned char dir, unsigned char ep_type,
487 unsigned int max_pkt_len,
488 unsigned int zlt, unsigned char mult)
489 {
490 struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
491 unsigned int tmp = 0;
492
493 /* set the Endpoint Capabilites in QH */
494 switch (ep_type) {
495 case USB_ENDPOINT_XFER_CONTROL:
496 /* Interrupt On Setup (IOS). for control ep */
497 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
498 | EP_QUEUE_HEAD_IOS;
499 break;
500 case USB_ENDPOINT_XFER_ISOC:
501 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
502 | (mult << EP_QUEUE_HEAD_MULT_POS);
503 break;
504 case USB_ENDPOINT_XFER_BULK:
505 case USB_ENDPOINT_XFER_INT:
506 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
507 break;
508 default:
509 VDBG("error ep type is %d", ep_type);
510 return;
511 }
512 if (zlt)
513 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
514
515 p_QH->max_pkt_length = cpu_to_hc32(tmp);
516 p_QH->next_dtd_ptr = 1;
517 p_QH->size_ioc_int_sts = 0;
518 }
519
520 /* Setup qh structure and ep register for ep0. */
ep0_setup(struct fsl_udc * udc)521 static void ep0_setup(struct fsl_udc *udc)
522 {
523 /* the intialization of an ep includes: fields in QH, Regs,
524 * fsl_ep struct */
525 struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
526 USB_MAX_CTRL_PAYLOAD, 0, 0);
527 struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
528 USB_MAX_CTRL_PAYLOAD, 0, 0);
529 dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
530 dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
531
532 return;
533
534 }
535
536 /***********************************************************************
537 Endpoint Management Functions
538 ***********************************************************************/
539
540 /*-------------------------------------------------------------------------
541 * when configurations are set, or when interface settings change
542 * for example the do_set_interface() in gadget layer,
543 * the driver will enable or disable the relevant endpoints
544 * ep0 doesn't use this routine. It is always enabled.
545 -------------------------------------------------------------------------*/
fsl_ep_enable(struct usb_ep * _ep,const struct usb_endpoint_descriptor * desc)546 static int fsl_ep_enable(struct usb_ep *_ep,
547 const struct usb_endpoint_descriptor *desc)
548 {
549 struct fsl_udc *udc = NULL;
550 struct fsl_ep *ep = NULL;
551 unsigned short max = 0;
552 unsigned char mult = 0, zlt;
553 int retval = -EINVAL;
554 unsigned long flags = 0;
555
556 ep = container_of(_ep, struct fsl_ep, ep);
557
558 /* catch various bogus parameters */
559 if (!_ep || !desc
560 || (desc->bDescriptorType != USB_DT_ENDPOINT))
561 return -EINVAL;
562
563 udc = ep->udc;
564
565 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
566 return -ESHUTDOWN;
567
568 max = usb_endpoint_maxp(desc);
569
570 /* Disable automatic zlp generation. Driver is responsible to indicate
571 * explicitly through req->req.zero. This is needed to enable multi-td
572 * request. */
573 zlt = 1;
574
575 /* Assume the max packet size from gadget is always correct */
576 switch (desc->bmAttributes & 0x03) {
577 case USB_ENDPOINT_XFER_CONTROL:
578 case USB_ENDPOINT_XFER_BULK:
579 case USB_ENDPOINT_XFER_INT:
580 /* mult = 0. Execute N Transactions as demonstrated by
581 * the USB variable length packet protocol where N is
582 * computed using the Maximum Packet Length (dQH) and
583 * the Total Bytes field (dTD) */
584 mult = 0;
585 break;
586 case USB_ENDPOINT_XFER_ISOC:
587 /* Calculate transactions needed for high bandwidth iso */
588 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
589 max = max & 0x7ff; /* bit 0~10 */
590 /* 3 transactions at most */
591 if (mult > 3)
592 goto en_done;
593 break;
594 default:
595 goto en_done;
596 }
597
598 spin_lock_irqsave(&udc->lock, flags);
599 ep->ep.maxpacket = max;
600 ep->ep.desc = desc;
601 ep->stopped = 0;
602
603 /* Controller related setup */
604 /* Init EPx Queue Head (Ep Capabilites field in QH
605 * according to max, zlt, mult) */
606 struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
607 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
608 ? USB_SEND : USB_RECV),
609 (unsigned char) (desc->bmAttributes
610 & USB_ENDPOINT_XFERTYPE_MASK),
611 max, zlt, mult);
612
613 /* Init endpoint ctrl register */
614 dr_ep_setup((unsigned char) ep_index(ep),
615 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
616 ? USB_SEND : USB_RECV),
617 (unsigned char) (desc->bmAttributes
618 & USB_ENDPOINT_XFERTYPE_MASK));
619
620 spin_unlock_irqrestore(&udc->lock, flags);
621 retval = 0;
622
623 VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
624 ep->ep.desc->bEndpointAddress & 0x0f,
625 (desc->bEndpointAddress & USB_DIR_IN)
626 ? "in" : "out", max);
627 en_done:
628 return retval;
629 }
630
631 /*---------------------------------------------------------------------
632 * @ep : the ep being unconfigured. May not be ep0
633 * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
634 *---------------------------------------------------------------------*/
fsl_ep_disable(struct usb_ep * _ep)635 static int fsl_ep_disable(struct usb_ep *_ep)
636 {
637 struct fsl_udc *udc = NULL;
638 struct fsl_ep *ep = NULL;
639 unsigned long flags = 0;
640 u32 epctrl;
641 int ep_num;
642
643 ep = container_of(_ep, struct fsl_ep, ep);
644 if (!_ep || !ep->ep.desc) {
645 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
646 return -EINVAL;
647 }
648
649 /* disable ep on controller */
650 ep_num = ep_index(ep);
651 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
652 if (ep_is_in(ep)) {
653 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
654 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
655 } else {
656 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
657 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
658 }
659 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
660
661 udc = (struct fsl_udc *)ep->udc;
662 spin_lock_irqsave(&udc->lock, flags);
663
664 /* nuke all pending requests (does flush) */
665 nuke(ep, -ESHUTDOWN);
666
667 ep->ep.desc = NULL;
668 ep->stopped = 1;
669 spin_unlock_irqrestore(&udc->lock, flags);
670
671 VDBG("disabled %s OK", _ep->name);
672 return 0;
673 }
674
675 /*---------------------------------------------------------------------
676 * allocate a request object used by this endpoint
677 * the main operation is to insert the req->queue to the eq->queue
678 * Returns the request, or null if one could not be allocated
679 *---------------------------------------------------------------------*/
680 static struct usb_request *
fsl_alloc_request(struct usb_ep * _ep,gfp_t gfp_flags)681 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
682 {
683 struct fsl_req *req = NULL;
684
685 req = kzalloc(sizeof *req, gfp_flags);
686 if (!req)
687 return NULL;
688
689 req->req.dma = DMA_ADDR_INVALID;
690 INIT_LIST_HEAD(&req->queue);
691
692 return &req->req;
693 }
694
fsl_free_request(struct usb_ep * _ep,struct usb_request * _req)695 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
696 {
697 struct fsl_req *req = NULL;
698
699 req = container_of(_req, struct fsl_req, req);
700
701 if (_req)
702 kfree(req);
703 }
704
705 /* Actually add a dTD chain to an empty dQH and let go */
fsl_prime_ep(struct fsl_ep * ep,struct ep_td_struct * td)706 static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
707 {
708 struct ep_queue_head *qh = get_qh_by_ep(ep);
709
710 /* Write dQH next pointer and terminate bit to 0 */
711 qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
712 & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
713
714 /* Clear active and halt bit */
715 qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
716 | EP_QUEUE_HEAD_STATUS_HALT));
717
718 /* Ensure that updates to the QH will occur before priming. */
719 wmb();
720
721 /* Prime endpoint by writing correct bit to ENDPTPRIME */
722 fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
723 : (1 << (ep_index(ep))), &dr_regs->endpointprime);
724 }
725
726 /* Add dTD chain to the dQH of an EP */
fsl_queue_td(struct fsl_ep * ep,struct fsl_req * req)727 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
728 {
729 u32 temp, bitmask, tmp_stat;
730
731 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
732 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
733
734 bitmask = ep_is_in(ep)
735 ? (1 << (ep_index(ep) + 16))
736 : (1 << (ep_index(ep)));
737
738 /* check if the pipe is empty */
739 if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
740 /* Add td to the end */
741 struct fsl_req *lastreq;
742 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
743 lastreq->tail->next_td_ptr =
744 cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
745 /* Ensure dTD's next dtd pointer to be updated */
746 wmb();
747 /* Read prime bit, if 1 goto done */
748 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
749 return;
750
751 do {
752 /* Set ATDTW bit in USBCMD */
753 temp = fsl_readl(&dr_regs->usbcmd);
754 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
755
756 /* Read correct status bit */
757 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
758
759 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
760
761 /* Write ATDTW bit to 0 */
762 temp = fsl_readl(&dr_regs->usbcmd);
763 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
764
765 if (tmp_stat)
766 return;
767 }
768
769 fsl_prime_ep(ep, req->head);
770 }
771
772 /* Fill in the dTD structure
773 * @req: request that the transfer belongs to
774 * @length: return actually data length of the dTD
775 * @dma: return dma address of the dTD
776 * @is_last: return flag if it is the last dTD of the request
777 * return: pointer to the built dTD */
fsl_build_dtd(struct fsl_req * req,unsigned * length,dma_addr_t * dma,int * is_last,gfp_t gfp_flags)778 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
779 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
780 {
781 u32 swap_temp;
782 struct ep_td_struct *dtd;
783
784 /* how big will this transfer be? */
785 *length = min(req->req.length - req->req.actual,
786 (unsigned)EP_MAX_LENGTH_TRANSFER);
787
788 dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
789 if (dtd == NULL)
790 return dtd;
791
792 dtd->td_dma = *dma;
793 /* Clear reserved field */
794 swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
795 swap_temp &= ~DTD_RESERVED_FIELDS;
796 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
797
798 /* Init all of buffer page pointers */
799 swap_temp = (u32) (req->req.dma + req->req.actual);
800 dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
801 dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
802 dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
803 dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
804 dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
805
806 req->req.actual += *length;
807
808 /* zlp is needed if req->req.zero is set */
809 if (req->req.zero) {
810 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
811 *is_last = 1;
812 else
813 *is_last = 0;
814 } else if (req->req.length == req->req.actual)
815 *is_last = 1;
816 else
817 *is_last = 0;
818
819 if ((*is_last) == 0)
820 VDBG("multi-dtd request!");
821 /* Fill in the transfer size; set active bit */
822 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
823
824 /* Enable interrupt for the last dtd of a request */
825 if (*is_last && !req->req.no_interrupt)
826 swap_temp |= DTD_IOC;
827
828 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
829
830 mb();
831
832 VDBG("length = %d address= 0x%x", *length, (int)*dma);
833
834 return dtd;
835 }
836
837 /* Generate dtd chain for a request */
fsl_req_to_dtd(struct fsl_req * req,gfp_t gfp_flags)838 static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
839 {
840 unsigned count;
841 int is_last;
842 int is_first =1;
843 struct ep_td_struct *last_dtd = NULL, *dtd;
844 dma_addr_t dma;
845
846 do {
847 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
848 if (dtd == NULL)
849 return -ENOMEM;
850
851 if (is_first) {
852 is_first = 0;
853 req->head = dtd;
854 } else {
855 last_dtd->next_td_ptr = cpu_to_hc32(dma);
856 last_dtd->next_td_virt = dtd;
857 }
858 last_dtd = dtd;
859
860 req->dtd_count++;
861 } while (!is_last);
862
863 dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
864
865 req->tail = dtd;
866
867 return 0;
868 }
869
870 /* queues (submits) an I/O request to an endpoint */
871 static int
fsl_ep_queue(struct usb_ep * _ep,struct usb_request * _req,gfp_t gfp_flags)872 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
873 {
874 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
875 struct fsl_req *req = container_of(_req, struct fsl_req, req);
876 struct fsl_udc *udc;
877 unsigned long flags;
878 int ret;
879
880 /* catch various bogus parameters */
881 if (!_req || !req->req.complete || !req->req.buf
882 || !list_empty(&req->queue)) {
883 VDBG("%s, bad params", __func__);
884 return -EINVAL;
885 }
886 if (unlikely(!_ep || !ep->ep.desc)) {
887 VDBG("%s, bad ep", __func__);
888 return -EINVAL;
889 }
890 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
891 if (req->req.length > ep->ep.maxpacket)
892 return -EMSGSIZE;
893 }
894
895 udc = ep->udc;
896 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
897 return -ESHUTDOWN;
898
899 req->ep = ep;
900
901 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
902 if (ret)
903 return ret;
904
905 req->req.status = -EINPROGRESS;
906 req->req.actual = 0;
907 req->dtd_count = 0;
908
909 /* build dtds and push them to device queue */
910 if (!fsl_req_to_dtd(req, gfp_flags)) {
911 spin_lock_irqsave(&udc->lock, flags);
912 fsl_queue_td(ep, req);
913 } else {
914 return -ENOMEM;
915 }
916
917 /* irq handler advances the queue */
918 if (req != NULL)
919 list_add_tail(&req->queue, &ep->queue);
920 spin_unlock_irqrestore(&udc->lock, flags);
921
922 return 0;
923 }
924
925 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
fsl_ep_dequeue(struct usb_ep * _ep,struct usb_request * _req)926 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
927 {
928 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
929 struct fsl_req *req;
930 unsigned long flags;
931 int ep_num, stopped, ret = 0;
932 u32 epctrl;
933
934 if (!_ep || !_req)
935 return -EINVAL;
936
937 spin_lock_irqsave(&ep->udc->lock, flags);
938 stopped = ep->stopped;
939
940 /* Stop the ep before we deal with the queue */
941 ep->stopped = 1;
942 ep_num = ep_index(ep);
943 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
944 if (ep_is_in(ep))
945 epctrl &= ~EPCTRL_TX_ENABLE;
946 else
947 epctrl &= ~EPCTRL_RX_ENABLE;
948 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
949
950 /* make sure it's actually queued on this endpoint */
951 list_for_each_entry(req, &ep->queue, queue) {
952 if (&req->req == _req)
953 break;
954 }
955 if (&req->req != _req) {
956 ret = -EINVAL;
957 goto out;
958 }
959
960 /* The request is in progress, or completed but not dequeued */
961 if (ep->queue.next == &req->queue) {
962 _req->status = -ECONNRESET;
963 fsl_ep_fifo_flush(_ep); /* flush current transfer */
964
965 /* The request isn't the last request in this ep queue */
966 if (req->queue.next != &ep->queue) {
967 struct fsl_req *next_req;
968
969 next_req = list_entry(req->queue.next, struct fsl_req,
970 queue);
971
972 /* prime with dTD of next request */
973 fsl_prime_ep(ep, next_req->head);
974 }
975 /* The request hasn't been processed, patch up the TD chain */
976 } else {
977 struct fsl_req *prev_req;
978
979 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
980 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
981 }
982
983 done(ep, req, -ECONNRESET);
984
985 /* Enable EP */
986 out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
987 if (ep_is_in(ep))
988 epctrl |= EPCTRL_TX_ENABLE;
989 else
990 epctrl |= EPCTRL_RX_ENABLE;
991 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
992 ep->stopped = stopped;
993
994 spin_unlock_irqrestore(&ep->udc->lock, flags);
995 return ret;
996 }
997
998 /*-------------------------------------------------------------------------*/
999
1000 /*-----------------------------------------------------------------
1001 * modify the endpoint halt feature
1002 * @ep: the non-isochronous endpoint being stalled
1003 * @value: 1--set halt 0--clear halt
1004 * Returns zero, or a negative error code.
1005 *----------------------------------------------------------------*/
fsl_ep_set_halt(struct usb_ep * _ep,int value)1006 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1007 {
1008 struct fsl_ep *ep = NULL;
1009 unsigned long flags = 0;
1010 int status = -EOPNOTSUPP; /* operation not supported */
1011 unsigned char ep_dir = 0, ep_num = 0;
1012 struct fsl_udc *udc = NULL;
1013
1014 ep = container_of(_ep, struct fsl_ep, ep);
1015 udc = ep->udc;
1016 if (!_ep || !ep->ep.desc) {
1017 status = -EINVAL;
1018 goto out;
1019 }
1020
1021 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1022 status = -EOPNOTSUPP;
1023 goto out;
1024 }
1025
1026 /* Attempt to halt IN ep will fail if any transfer requests
1027 * are still queue */
1028 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1029 status = -EAGAIN;
1030 goto out;
1031 }
1032
1033 status = 0;
1034 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1035 ep_num = (unsigned char)(ep_index(ep));
1036 spin_lock_irqsave(&ep->udc->lock, flags);
1037 dr_ep_change_stall(ep_num, ep_dir, value);
1038 spin_unlock_irqrestore(&ep->udc->lock, flags);
1039
1040 if (ep_index(ep) == 0) {
1041 udc->ep0_state = WAIT_FOR_SETUP;
1042 udc->ep0_dir = 0;
1043 }
1044 out:
1045 VDBG(" %s %s halt stat %d", ep->ep.name,
1046 value ? "set" : "clear", status);
1047
1048 return status;
1049 }
1050
fsl_ep_fifo_status(struct usb_ep * _ep)1051 static int fsl_ep_fifo_status(struct usb_ep *_ep)
1052 {
1053 struct fsl_ep *ep;
1054 struct fsl_udc *udc;
1055 int size = 0;
1056 u32 bitmask;
1057 struct ep_queue_head *qh;
1058
1059 ep = container_of(_ep, struct fsl_ep, ep);
1060 if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1061 return -ENODEV;
1062
1063 udc = (struct fsl_udc *)ep->udc;
1064
1065 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1066 return -ESHUTDOWN;
1067
1068 qh = get_qh_by_ep(ep);
1069
1070 bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1071 (1 << (ep_index(ep)));
1072
1073 if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1074 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1075 >> DTD_LENGTH_BIT_POS;
1076
1077 pr_debug("%s %u\n", __func__, size);
1078 return size;
1079 }
1080
fsl_ep_fifo_flush(struct usb_ep * _ep)1081 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1082 {
1083 struct fsl_ep *ep;
1084 int ep_num, ep_dir;
1085 u32 bits;
1086 unsigned long timeout;
1087 #define FSL_UDC_FLUSH_TIMEOUT 1000
1088
1089 if (!_ep) {
1090 return;
1091 } else {
1092 ep = container_of(_ep, struct fsl_ep, ep);
1093 if (!ep->ep.desc)
1094 return;
1095 }
1096 ep_num = ep_index(ep);
1097 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1098
1099 if (ep_num == 0)
1100 bits = (1 << 16) | 1;
1101 else if (ep_dir == USB_SEND)
1102 bits = 1 << (16 + ep_num);
1103 else
1104 bits = 1 << ep_num;
1105
1106 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1107 do {
1108 fsl_writel(bits, &dr_regs->endptflush);
1109
1110 /* Wait until flush complete */
1111 while (fsl_readl(&dr_regs->endptflush)) {
1112 if (time_after(jiffies, timeout)) {
1113 ERR("ep flush timeout\n");
1114 return;
1115 }
1116 cpu_relax();
1117 }
1118 /* See if we need to flush again */
1119 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1120 }
1121
1122 static struct usb_ep_ops fsl_ep_ops = {
1123 .enable = fsl_ep_enable,
1124 .disable = fsl_ep_disable,
1125
1126 .alloc_request = fsl_alloc_request,
1127 .free_request = fsl_free_request,
1128
1129 .queue = fsl_ep_queue,
1130 .dequeue = fsl_ep_dequeue,
1131
1132 .set_halt = fsl_ep_set_halt,
1133 .fifo_status = fsl_ep_fifo_status,
1134 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1135 };
1136
1137 /*-------------------------------------------------------------------------
1138 Gadget Driver Layer Operations
1139 -------------------------------------------------------------------------*/
1140
1141 /*----------------------------------------------------------------------
1142 * Get the current frame number (from DR frame_index Reg )
1143 *----------------------------------------------------------------------*/
fsl_get_frame(struct usb_gadget * gadget)1144 static int fsl_get_frame(struct usb_gadget *gadget)
1145 {
1146 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1147 }
1148
1149 /*-----------------------------------------------------------------------
1150 * Tries to wake up the host connected to this gadget
1151 -----------------------------------------------------------------------*/
fsl_wakeup(struct usb_gadget * gadget)1152 static int fsl_wakeup(struct usb_gadget *gadget)
1153 {
1154 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1155 u32 portsc;
1156
1157 /* Remote wakeup feature not enabled by host */
1158 if (!udc->remote_wakeup)
1159 return -ENOTSUPP;
1160
1161 portsc = fsl_readl(&dr_regs->portsc1);
1162 /* not suspended? */
1163 if (!(portsc & PORTSCX_PORT_SUSPEND))
1164 return 0;
1165 /* trigger force resume */
1166 portsc |= PORTSCX_PORT_FORCE_RESUME;
1167 fsl_writel(portsc, &dr_regs->portsc1);
1168 return 0;
1169 }
1170
can_pullup(struct fsl_udc * udc)1171 static int can_pullup(struct fsl_udc *udc)
1172 {
1173 return udc->driver && udc->softconnect && udc->vbus_active;
1174 }
1175
1176 /* Notify controller that VBUS is powered, Called by whatever
1177 detects VBUS sessions */
fsl_vbus_session(struct usb_gadget * gadget,int is_active)1178 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1179 {
1180 struct fsl_udc *udc;
1181 unsigned long flags;
1182
1183 udc = container_of(gadget, struct fsl_udc, gadget);
1184 spin_lock_irqsave(&udc->lock, flags);
1185 VDBG("VBUS %s", is_active ? "on" : "off");
1186 udc->vbus_active = (is_active != 0);
1187 if (can_pullup(udc))
1188 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1189 &dr_regs->usbcmd);
1190 else
1191 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1192 &dr_regs->usbcmd);
1193 spin_unlock_irqrestore(&udc->lock, flags);
1194 return 0;
1195 }
1196
1197 /* constrain controller's VBUS power usage
1198 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1199 * reporting how much power the device may consume. For example, this
1200 * could affect how quickly batteries are recharged.
1201 *
1202 * Returns zero on success, else negative errno.
1203 */
fsl_vbus_draw(struct usb_gadget * gadget,unsigned mA)1204 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1205 {
1206 struct fsl_udc *udc;
1207
1208 udc = container_of(gadget, struct fsl_udc, gadget);
1209 if (!IS_ERR_OR_NULL(udc->transceiver))
1210 return usb_phy_set_power(udc->transceiver, mA);
1211 return -ENOTSUPP;
1212 }
1213
1214 /* Change Data+ pullup status
1215 * this func is used by usb_gadget_connect/disconnet
1216 */
fsl_pullup(struct usb_gadget * gadget,int is_on)1217 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1218 {
1219 struct fsl_udc *udc;
1220
1221 udc = container_of(gadget, struct fsl_udc, gadget);
1222
1223 if (!udc->vbus_active)
1224 return -EOPNOTSUPP;
1225
1226 udc->softconnect = (is_on != 0);
1227 if (can_pullup(udc))
1228 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1229 &dr_regs->usbcmd);
1230 else
1231 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1232 &dr_regs->usbcmd);
1233
1234 return 0;
1235 }
1236
1237 static int fsl_udc_start(struct usb_gadget *g,
1238 struct usb_gadget_driver *driver);
1239 static int fsl_udc_stop(struct usb_gadget *g);
1240
1241 static const struct usb_gadget_ops fsl_gadget_ops = {
1242 .get_frame = fsl_get_frame,
1243 .wakeup = fsl_wakeup,
1244 /* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1245 .vbus_session = fsl_vbus_session,
1246 .vbus_draw = fsl_vbus_draw,
1247 .pullup = fsl_pullup,
1248 .udc_start = fsl_udc_start,
1249 .udc_stop = fsl_udc_stop,
1250 };
1251
1252 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1253 on new transaction */
ep0stall(struct fsl_udc * udc)1254 static void ep0stall(struct fsl_udc *udc)
1255 {
1256 u32 tmp;
1257
1258 /* must set tx and rx to stall at the same time */
1259 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1260 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1261 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1262 udc->ep0_state = WAIT_FOR_SETUP;
1263 udc->ep0_dir = 0;
1264 }
1265
1266 /* Prime a status phase for ep0 */
ep0_prime_status(struct fsl_udc * udc,int direction)1267 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1268 {
1269 struct fsl_req *req = udc->status_req;
1270 struct fsl_ep *ep;
1271 int ret;
1272
1273 if (direction == EP_DIR_IN)
1274 udc->ep0_dir = USB_DIR_IN;
1275 else
1276 udc->ep0_dir = USB_DIR_OUT;
1277
1278 ep = &udc->eps[0];
1279 if (udc->ep0_state != DATA_STATE_XMIT)
1280 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1281
1282 req->ep = ep;
1283 req->req.length = 0;
1284 req->req.status = -EINPROGRESS;
1285 req->req.actual = 0;
1286 req->req.complete = NULL;
1287 req->dtd_count = 0;
1288
1289 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1290 if (ret)
1291 return ret;
1292
1293 if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1294 fsl_queue_td(ep, req);
1295 else
1296 return -ENOMEM;
1297
1298 list_add_tail(&req->queue, &ep->queue);
1299
1300 return 0;
1301 }
1302
udc_reset_ep_queue(struct fsl_udc * udc,u8 pipe)1303 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1304 {
1305 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1306
1307 if (ep->name)
1308 nuke(ep, -ESHUTDOWN);
1309 }
1310
1311 /*
1312 * ch9 Set address
1313 */
ch9setaddress(struct fsl_udc * udc,u16 value,u16 index,u16 length)1314 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1315 {
1316 /* Save the new address to device struct */
1317 udc->device_address = (u8) value;
1318 /* Update usb state */
1319 udc->usb_state = USB_STATE_ADDRESS;
1320 /* Status phase */
1321 if (ep0_prime_status(udc, EP_DIR_IN))
1322 ep0stall(udc);
1323 }
1324
1325 /*
1326 * ch9 Get status
1327 */
ch9getstatus(struct fsl_udc * udc,u8 request_type,u16 value,u16 index,u16 length)1328 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1329 u16 index, u16 length)
1330 {
1331 u16 tmp = 0; /* Status, cpu endian */
1332 struct fsl_req *req;
1333 struct fsl_ep *ep;
1334 int ret;
1335
1336 ep = &udc->eps[0];
1337
1338 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1339 /* Get device status */
1340 tmp = udc->gadget.is_selfpowered;
1341 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1342 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1343 /* Get interface status */
1344 /* We don't have interface information in udc driver */
1345 tmp = 0;
1346 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1347 /* Get endpoint status */
1348 struct fsl_ep *target_ep;
1349
1350 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1351
1352 /* stall if endpoint doesn't exist */
1353 if (!target_ep->ep.desc)
1354 goto stall;
1355 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1356 << USB_ENDPOINT_HALT;
1357 }
1358
1359 udc->ep0_dir = USB_DIR_IN;
1360 /* Borrow the per device status_req */
1361 req = udc->status_req;
1362 /* Fill in the reqest structure */
1363 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1364
1365 req->ep = ep;
1366 req->req.length = 2;
1367 req->req.status = -EINPROGRESS;
1368 req->req.actual = 0;
1369 req->req.complete = NULL;
1370 req->dtd_count = 0;
1371
1372 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1373 if (ret)
1374 goto stall;
1375
1376 /* prime the data phase */
1377 if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1378 fsl_queue_td(ep, req);
1379 else /* no mem */
1380 goto stall;
1381
1382 list_add_tail(&req->queue, &ep->queue);
1383 udc->ep0_state = DATA_STATE_XMIT;
1384 if (ep0_prime_status(udc, EP_DIR_OUT))
1385 ep0stall(udc);
1386
1387 return;
1388 stall:
1389 ep0stall(udc);
1390 }
1391
setup_received_irq(struct fsl_udc * udc,struct usb_ctrlrequest * setup)1392 static void setup_received_irq(struct fsl_udc *udc,
1393 struct usb_ctrlrequest *setup)
1394 __releases(udc->lock)
1395 __acquires(udc->lock)
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 /*
1498 * If the data stage is IN, send status prime immediately.
1499 * See 2.0 Spec chapter 8.5.3.3 for detail.
1500 */
1501 if (udc->ep0_state == DATA_STATE_XMIT)
1502 if (ep0_prime_status(udc, EP_DIR_OUT))
1503 ep0stall(udc);
1504
1505 } else {
1506 /* No data phase, IN status from gadget */
1507 udc->ep0_dir = USB_DIR_IN;
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 = WAIT_FOR_OUT_STATUS;
1514 }
1515 }
1516
1517 /* Process request for Data or Status phase of ep0
1518 * prime status phase if needed */
ep0_req_complete(struct fsl_udc * udc,struct fsl_ep * ep0,struct fsl_req * req)1519 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1520 struct fsl_req *req)
1521 {
1522 if (udc->usb_state == USB_STATE_ADDRESS) {
1523 /* Set the new address */
1524 u32 new_address = (u32) udc->device_address;
1525 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1526 &dr_regs->deviceaddr);
1527 }
1528
1529 done(ep0, req, 0);
1530
1531 switch (udc->ep0_state) {
1532 case DATA_STATE_XMIT:
1533 /* already primed at setup_received_irq */
1534 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1535 break;
1536 case DATA_STATE_RECV:
1537 /* send status phase */
1538 if (ep0_prime_status(udc, EP_DIR_IN))
1539 ep0stall(udc);
1540 break;
1541 case WAIT_FOR_OUT_STATUS:
1542 udc->ep0_state = WAIT_FOR_SETUP;
1543 break;
1544 case WAIT_FOR_SETUP:
1545 ERR("Unexpect ep0 packets\n");
1546 break;
1547 default:
1548 ep0stall(udc);
1549 break;
1550 }
1551 }
1552
1553 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1554 * being corrupted by another incoming setup packet */
tripwire_handler(struct fsl_udc * udc,u8 ep_num,u8 * buffer_ptr)1555 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1556 {
1557 u32 temp;
1558 struct ep_queue_head *qh;
1559 struct fsl_usb2_platform_data *pdata = udc->pdata;
1560
1561 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1562
1563 /* Clear bit in ENDPTSETUPSTAT */
1564 temp = fsl_readl(&dr_regs->endptsetupstat);
1565 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1566
1567 /* while a hazard exists when setup package arrives */
1568 do {
1569 /* Set Setup Tripwire */
1570 temp = fsl_readl(&dr_regs->usbcmd);
1571 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1572
1573 /* Copy the setup packet to local buffer */
1574 if (pdata->le_setup_buf) {
1575 u32 *p = (u32 *)buffer_ptr;
1576 u32 *s = (u32 *)qh->setup_buffer;
1577
1578 /* Convert little endian setup buffer to CPU endian */
1579 *p++ = le32_to_cpu(*s++);
1580 *p = le32_to_cpu(*s);
1581 } else {
1582 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1583 }
1584 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1585
1586 /* Clear Setup Tripwire */
1587 temp = fsl_readl(&dr_regs->usbcmd);
1588 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1589 }
1590
1591 /* process-ep_req(): free the completed Tds for this req */
process_ep_req(struct fsl_udc * udc,int pipe,struct fsl_req * curr_req)1592 static int process_ep_req(struct fsl_udc *udc, int pipe,
1593 struct fsl_req *curr_req)
1594 {
1595 struct ep_td_struct *curr_td;
1596 int td_complete, actual, remaining_length, j, tmp;
1597 int status = 0;
1598 int errors = 0;
1599 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1600 int direction = pipe % 2;
1601
1602 curr_td = curr_req->head;
1603 td_complete = 0;
1604 actual = curr_req->req.length;
1605
1606 for (j = 0; j < curr_req->dtd_count; j++) {
1607 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1608 & DTD_PACKET_SIZE)
1609 >> DTD_LENGTH_BIT_POS;
1610 actual -= remaining_length;
1611
1612 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1613 if (errors & DTD_ERROR_MASK) {
1614 if (errors & DTD_STATUS_HALTED) {
1615 ERR("dTD error %08x QH=%d\n", errors, pipe);
1616 /* Clear the errors and Halt condition */
1617 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1618 tmp &= ~errors;
1619 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1620 status = -EPIPE;
1621 /* FIXME: continue with next queued TD? */
1622
1623 break;
1624 }
1625 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1626 VDBG("Transfer overflow");
1627 status = -EPROTO;
1628 break;
1629 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1630 VDBG("ISO error");
1631 status = -EILSEQ;
1632 break;
1633 } else
1634 ERR("Unknown error has occurred (0x%x)!\n",
1635 errors);
1636
1637 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1638 & DTD_STATUS_ACTIVE) {
1639 VDBG("Request not complete");
1640 status = REQ_UNCOMPLETE;
1641 return status;
1642 } else if (remaining_length) {
1643 if (direction) {
1644 VDBG("Transmit dTD remaining length not zero");
1645 status = -EPROTO;
1646 break;
1647 } else {
1648 td_complete++;
1649 break;
1650 }
1651 } else {
1652 td_complete++;
1653 VDBG("dTD transmitted successful");
1654 }
1655
1656 if (j != curr_req->dtd_count - 1)
1657 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1658 }
1659
1660 if (status)
1661 return status;
1662
1663 curr_req->req.actual = actual;
1664
1665 return 0;
1666 }
1667
1668 /* Process a DTD completion interrupt */
dtd_complete_irq(struct fsl_udc * udc)1669 static void dtd_complete_irq(struct fsl_udc *udc)
1670 {
1671 u32 bit_pos;
1672 int i, ep_num, direction, bit_mask, status;
1673 struct fsl_ep *curr_ep;
1674 struct fsl_req *curr_req, *temp_req;
1675
1676 /* Clear the bits in the register */
1677 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1678 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1679
1680 if (!bit_pos)
1681 return;
1682
1683 for (i = 0; i < udc->max_ep; i++) {
1684 ep_num = i >> 1;
1685 direction = i % 2;
1686
1687 bit_mask = 1 << (ep_num + 16 * direction);
1688
1689 if (!(bit_pos & bit_mask))
1690 continue;
1691
1692 curr_ep = get_ep_by_pipe(udc, i);
1693
1694 /* If the ep is configured */
1695 if (curr_ep->name == NULL) {
1696 WARNING("Invalid EP?");
1697 continue;
1698 }
1699
1700 /* process the req queue until an uncomplete request */
1701 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1702 queue) {
1703 status = process_ep_req(udc, i, curr_req);
1704
1705 VDBG("status of process_ep_req= %d, ep = %d",
1706 status, ep_num);
1707 if (status == REQ_UNCOMPLETE)
1708 break;
1709 /* write back status to req */
1710 curr_req->req.status = status;
1711
1712 if (ep_num == 0) {
1713 ep0_req_complete(udc, curr_ep, curr_req);
1714 break;
1715 } else
1716 done(curr_ep, curr_req, status);
1717 }
1718 }
1719 }
1720
portscx_device_speed(u32 reg)1721 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1722 {
1723 switch (reg & PORTSCX_PORT_SPEED_MASK) {
1724 case PORTSCX_PORT_SPEED_HIGH:
1725 return USB_SPEED_HIGH;
1726 case PORTSCX_PORT_SPEED_FULL:
1727 return USB_SPEED_FULL;
1728 case PORTSCX_PORT_SPEED_LOW:
1729 return USB_SPEED_LOW;
1730 default:
1731 return USB_SPEED_UNKNOWN;
1732 }
1733 }
1734
1735 /* Process a port change interrupt */
port_change_irq(struct fsl_udc * udc)1736 static void port_change_irq(struct fsl_udc *udc)
1737 {
1738 if (udc->bus_reset)
1739 udc->bus_reset = 0;
1740
1741 /* Bus resetting is finished */
1742 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1743 /* Get the speed */
1744 udc->gadget.speed =
1745 portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1746
1747 /* Update USB state */
1748 if (!udc->resume_state)
1749 udc->usb_state = USB_STATE_DEFAULT;
1750 }
1751
1752 /* Process suspend interrupt */
suspend_irq(struct fsl_udc * udc)1753 static void suspend_irq(struct fsl_udc *udc)
1754 {
1755 udc->resume_state = udc->usb_state;
1756 udc->usb_state = USB_STATE_SUSPENDED;
1757
1758 /* report suspend to the driver, serial.c does not support this */
1759 if (udc->driver->suspend)
1760 udc->driver->suspend(&udc->gadget);
1761 }
1762
bus_resume(struct fsl_udc * udc)1763 static void bus_resume(struct fsl_udc *udc)
1764 {
1765 udc->usb_state = udc->resume_state;
1766 udc->resume_state = 0;
1767
1768 /* report resume to the driver, serial.c does not support this */
1769 if (udc->driver->resume)
1770 udc->driver->resume(&udc->gadget);
1771 }
1772
1773 /* Clear up all ep queues */
reset_queues(struct fsl_udc * udc,bool bus_reset)1774 static int reset_queues(struct fsl_udc *udc, bool bus_reset)
1775 {
1776 u8 pipe;
1777
1778 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1779 udc_reset_ep_queue(udc, pipe);
1780
1781 /* report disconnect; the driver is already quiesced */
1782 spin_unlock(&udc->lock);
1783 if (bus_reset)
1784 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1785 else
1786 udc->driver->disconnect(&udc->gadget);
1787 spin_lock(&udc->lock);
1788
1789 return 0;
1790 }
1791
1792 /* Process reset interrupt */
reset_irq(struct fsl_udc * udc)1793 static void reset_irq(struct fsl_udc *udc)
1794 {
1795 u32 temp;
1796 unsigned long timeout;
1797
1798 /* Clear the device address */
1799 temp = fsl_readl(&dr_regs->deviceaddr);
1800 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1801
1802 udc->device_address = 0;
1803
1804 /* Clear usb state */
1805 udc->resume_state = 0;
1806 udc->ep0_dir = 0;
1807 udc->ep0_state = WAIT_FOR_SETUP;
1808 udc->remote_wakeup = 0; /* default to 0 on reset */
1809 udc->gadget.b_hnp_enable = 0;
1810 udc->gadget.a_hnp_support = 0;
1811 udc->gadget.a_alt_hnp_support = 0;
1812
1813 /* Clear all the setup token semaphores */
1814 temp = fsl_readl(&dr_regs->endptsetupstat);
1815 fsl_writel(temp, &dr_regs->endptsetupstat);
1816
1817 /* Clear all the endpoint complete status bits */
1818 temp = fsl_readl(&dr_regs->endptcomplete);
1819 fsl_writel(temp, &dr_regs->endptcomplete);
1820
1821 timeout = jiffies + 100;
1822 while (fsl_readl(&dr_regs->endpointprime)) {
1823 /* Wait until all endptprime bits cleared */
1824 if (time_after(jiffies, timeout)) {
1825 ERR("Timeout for reset\n");
1826 break;
1827 }
1828 cpu_relax();
1829 }
1830
1831 /* Write 1s to the flush register */
1832 fsl_writel(0xffffffff, &dr_regs->endptflush);
1833
1834 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1835 VDBG("Bus reset");
1836 /* Bus is reseting */
1837 udc->bus_reset = 1;
1838 /* Reset all the queues, include XD, dTD, EP queue
1839 * head and TR Queue */
1840 reset_queues(udc, true);
1841 udc->usb_state = USB_STATE_DEFAULT;
1842 } else {
1843 VDBG("Controller reset");
1844 /* initialize usb hw reg except for regs for EP, not
1845 * touch usbintr reg */
1846 dr_controller_setup(udc);
1847
1848 /* Reset all internal used Queues */
1849 reset_queues(udc, false);
1850
1851 ep0_setup(udc);
1852
1853 /* Enable DR IRQ reg, Set Run bit, change udc state */
1854 dr_controller_run(udc);
1855 udc->usb_state = USB_STATE_ATTACHED;
1856 }
1857 }
1858
1859 /*
1860 * USB device controller interrupt handler
1861 */
fsl_udc_irq(int irq,void * _udc)1862 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1863 {
1864 struct fsl_udc *udc = _udc;
1865 u32 irq_src;
1866 irqreturn_t status = IRQ_NONE;
1867 unsigned long flags;
1868
1869 /* Disable ISR for OTG host mode */
1870 if (udc->stopped)
1871 return IRQ_NONE;
1872 spin_lock_irqsave(&udc->lock, flags);
1873 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1874 /* Clear notification bits */
1875 fsl_writel(irq_src, &dr_regs->usbsts);
1876
1877 /* VDBG("irq_src [0x%8x]", irq_src); */
1878
1879 /* Need to resume? */
1880 if (udc->usb_state == USB_STATE_SUSPENDED)
1881 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1882 bus_resume(udc);
1883
1884 /* USB Interrupt */
1885 if (irq_src & USB_STS_INT) {
1886 VDBG("Packet int");
1887 /* Setup package, we only support ep0 as control ep */
1888 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1889 tripwire_handler(udc, 0,
1890 (u8 *) (&udc->local_setup_buff));
1891 setup_received_irq(udc, &udc->local_setup_buff);
1892 status = IRQ_HANDLED;
1893 }
1894
1895 /* completion of dtd */
1896 if (fsl_readl(&dr_regs->endptcomplete)) {
1897 dtd_complete_irq(udc);
1898 status = IRQ_HANDLED;
1899 }
1900 }
1901
1902 /* SOF (for ISO transfer) */
1903 if (irq_src & USB_STS_SOF) {
1904 status = IRQ_HANDLED;
1905 }
1906
1907 /* Port Change */
1908 if (irq_src & USB_STS_PORT_CHANGE) {
1909 port_change_irq(udc);
1910 status = IRQ_HANDLED;
1911 }
1912
1913 /* Reset Received */
1914 if (irq_src & USB_STS_RESET) {
1915 VDBG("reset int");
1916 reset_irq(udc);
1917 status = IRQ_HANDLED;
1918 }
1919
1920 /* Sleep Enable (Suspend) */
1921 if (irq_src & USB_STS_SUSPEND) {
1922 suspend_irq(udc);
1923 status = IRQ_HANDLED;
1924 }
1925
1926 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1927 VDBG("Error IRQ %x", irq_src);
1928 }
1929
1930 spin_unlock_irqrestore(&udc->lock, flags);
1931 return status;
1932 }
1933
1934 /*----------------------------------------------------------------*
1935 * Hook to gadget drivers
1936 * Called by initialization code of gadget drivers
1937 *----------------------------------------------------------------*/
fsl_udc_start(struct usb_gadget * g,struct usb_gadget_driver * driver)1938 static int fsl_udc_start(struct usb_gadget *g,
1939 struct usb_gadget_driver *driver)
1940 {
1941 int retval = 0;
1942 unsigned long flags = 0;
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 spin_unlock_irqrestore(&udc_controller->lock, flags);
1951 g->is_selfpowered = 1;
1952
1953 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1954 /* Suspend the controller until OTG enable it */
1955 udc_controller->stopped = 1;
1956 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1957
1958 /* connect to bus through transceiver */
1959 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1960 retval = otg_set_peripheral(
1961 udc_controller->transceiver->otg,
1962 &udc_controller->gadget);
1963 if (retval < 0) {
1964 ERR("can't bind to transceiver\n");
1965 udc_controller->driver = NULL;
1966 return retval;
1967 }
1968 }
1969 } else {
1970 /* Enable DR IRQ reg and set USBCMD reg Run bit */
1971 dr_controller_run(udc_controller);
1972 udc_controller->usb_state = USB_STATE_ATTACHED;
1973 udc_controller->ep0_state = WAIT_FOR_SETUP;
1974 udc_controller->ep0_dir = 0;
1975 }
1976
1977 return retval;
1978 }
1979
1980 /* Disconnect from gadget driver */
fsl_udc_stop(struct usb_gadget * g)1981 static int fsl_udc_stop(struct usb_gadget *g)
1982 {
1983 struct fsl_ep *loop_ep;
1984 unsigned long flags;
1985
1986 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
1987 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
1988
1989 /* stop DR, disable intr */
1990 dr_controller_stop(udc_controller);
1991
1992 /* in fact, no needed */
1993 udc_controller->usb_state = USB_STATE_ATTACHED;
1994 udc_controller->ep0_state = WAIT_FOR_SETUP;
1995 udc_controller->ep0_dir = 0;
1996
1997 /* stand operation */
1998 spin_lock_irqsave(&udc_controller->lock, flags);
1999 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2000 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2001 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2002 ep.ep_list)
2003 nuke(loop_ep, -ESHUTDOWN);
2004 spin_unlock_irqrestore(&udc_controller->lock, flags);
2005
2006 udc_controller->driver = NULL;
2007
2008 return 0;
2009 }
2010
2011 /*-------------------------------------------------------------------------
2012 PROC File System Support
2013 -------------------------------------------------------------------------*/
2014 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2015
2016 #include <linux/seq_file.h>
2017
2018 static const char proc_filename[] = "driver/fsl_usb2_udc";
2019
fsl_proc_read(struct seq_file * m,void * v)2020 static int fsl_proc_read(struct seq_file *m, void *v)
2021 {
2022 unsigned long flags;
2023 int i;
2024 u32 tmp_reg;
2025 struct fsl_ep *ep = NULL;
2026 struct fsl_req *req;
2027
2028 struct fsl_udc *udc = udc_controller;
2029
2030 spin_lock_irqsave(&udc->lock, flags);
2031
2032 /* ------basic driver information ---- */
2033 seq_printf(m,
2034 DRIVER_DESC "\n"
2035 "%s version: %s\n"
2036 "Gadget driver: %s\n\n",
2037 driver_name, DRIVER_VERSION,
2038 udc->driver ? udc->driver->driver.name : "(none)");
2039
2040 /* ------ DR Registers ----- */
2041 tmp_reg = fsl_readl(&dr_regs->usbcmd);
2042 seq_printf(m,
2043 "USBCMD reg:\n"
2044 "SetupTW: %d\n"
2045 "Run/Stop: %s\n\n",
2046 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2047 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2048
2049 tmp_reg = fsl_readl(&dr_regs->usbsts);
2050 seq_printf(m,
2051 "USB Status Reg:\n"
2052 "Dr Suspend: %d Reset Received: %d System Error: %s "
2053 "USB Error Interrupt: %s\n\n",
2054 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2055 (tmp_reg & USB_STS_RESET) ? 1 : 0,
2056 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2057 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2058
2059 tmp_reg = fsl_readl(&dr_regs->usbintr);
2060 seq_printf(m,
2061 "USB Interrupt Enable Reg:\n"
2062 "Sleep Enable: %d SOF Received Enable: %d "
2063 "Reset Enable: %d\n"
2064 "System Error Enable: %d "
2065 "Port Change Dectected Enable: %d\n"
2066 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2067 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2068 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2069 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2070 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2071 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2072 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2073 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2074
2075 tmp_reg = fsl_readl(&dr_regs->frindex);
2076 seq_printf(m,
2077 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2078 (tmp_reg & USB_FRINDEX_MASKS));
2079
2080 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2081 seq_printf(m,
2082 "USB Device Address Reg: Device Addr is 0x%x\n\n",
2083 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2084
2085 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2086 seq_printf(m,
2087 "USB Endpoint List Address Reg: "
2088 "Device Addr is 0x%x\n\n",
2089 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2090
2091 tmp_reg = fsl_readl(&dr_regs->portsc1);
2092 seq_printf(m,
2093 "USB Port Status&Control Reg:\n"
2094 "Port Transceiver Type : %s Port Speed: %s\n"
2095 "PHY Low Power Suspend: %s Port Reset: %s "
2096 "Port Suspend Mode: %s\n"
2097 "Over-current Change: %s "
2098 "Port Enable/Disable Change: %s\n"
2099 "Port Enabled/Disabled: %s "
2100 "Current Connect Status: %s\n\n", ( {
2101 const char *s;
2102 switch (tmp_reg & PORTSCX_PTS_FSLS) {
2103 case PORTSCX_PTS_UTMI:
2104 s = "UTMI"; break;
2105 case PORTSCX_PTS_ULPI:
2106 s = "ULPI "; break;
2107 case PORTSCX_PTS_FSLS:
2108 s = "FS/LS Serial"; break;
2109 default:
2110 s = "None"; break;
2111 }
2112 s;} ),
2113 usb_speed_string(portscx_device_speed(tmp_reg)),
2114 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2115 "Normal PHY mode" : "Low power mode",
2116 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2117 "Not in Reset",
2118 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2119 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2120 "No",
2121 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2122 "Not change",
2123 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2124 "Not correct",
2125 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2126 "Attached" : "Not-Att");
2127
2128 tmp_reg = fsl_readl(&dr_regs->usbmode);
2129 seq_printf(m,
2130 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2131 const char *s;
2132 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2133 case USB_MODE_CTRL_MODE_IDLE:
2134 s = "Idle"; break;
2135 case USB_MODE_CTRL_MODE_DEVICE:
2136 s = "Device Controller"; break;
2137 case USB_MODE_CTRL_MODE_HOST:
2138 s = "Host Controller"; break;
2139 default:
2140 s = "None"; break;
2141 }
2142 s;
2143 } ));
2144
2145 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2146 seq_printf(m,
2147 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2148 (tmp_reg & EP_SETUP_STATUS_MASK));
2149
2150 for (i = 0; i < udc->max_ep / 2; i++) {
2151 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2152 seq_printf(m, "EP Ctrl Reg [0x%x]: = [0x%x]\n", i, tmp_reg);
2153 }
2154 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2155 seq_printf(m, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2156
2157 #ifndef CONFIG_ARCH_MXC
2158 if (udc->pdata->have_sysif_regs) {
2159 tmp_reg = usb_sys_regs->snoop1;
2160 seq_printf(m, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2161
2162 tmp_reg = usb_sys_regs->control;
2163 seq_printf(m, "General Control Reg : = [0x%x]\n\n", tmp_reg);
2164 }
2165 #endif
2166
2167 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2168 ep = &udc->eps[0];
2169 seq_printf(m, "For %s Maxpkt is 0x%x index is 0x%x\n",
2170 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2171
2172 if (list_empty(&ep->queue)) {
2173 seq_puts(m, "its req queue is empty\n\n");
2174 } else {
2175 list_for_each_entry(req, &ep->queue, queue) {
2176 seq_printf(m,
2177 "req %p actual 0x%x length 0x%x buf %p\n",
2178 &req->req, req->req.actual,
2179 req->req.length, req->req.buf);
2180 }
2181 }
2182 /* other gadget->eplist ep */
2183 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2184 if (ep->ep.desc) {
2185 seq_printf(m,
2186 "\nFor %s Maxpkt is 0x%x "
2187 "index is 0x%x\n",
2188 ep->ep.name, ep_maxpacket(ep),
2189 ep_index(ep));
2190
2191 if (list_empty(&ep->queue)) {
2192 seq_puts(m, "its req queue is empty\n\n");
2193 } else {
2194 list_for_each_entry(req, &ep->queue, queue) {
2195 seq_printf(m,
2196 "req %p actual 0x%x length "
2197 "0x%x buf %p\n",
2198 &req->req, req->req.actual,
2199 req->req.length, req->req.buf);
2200 } /* end for each_entry of ep req */
2201 } /* end for else */
2202 } /* end for if(ep->queue) */
2203 } /* end (ep->desc) */
2204
2205 spin_unlock_irqrestore(&udc->lock, flags);
2206 return 0;
2207 }
2208
2209 /*
2210 * seq_file wrappers for procfile show routines.
2211 */
fsl_proc_open(struct inode * inode,struct file * file)2212 static int fsl_proc_open(struct inode *inode, struct file *file)
2213 {
2214 return single_open(file, fsl_proc_read, NULL);
2215 }
2216
2217 static const struct file_operations fsl_proc_fops = {
2218 .open = fsl_proc_open,
2219 .read = seq_read,
2220 .llseek = seq_lseek,
2221 .release = single_release,
2222 };
2223
2224 #define create_proc_file() proc_create(proc_filename, 0, NULL, &fsl_proc_fops)
2225 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2226
2227 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2228
2229 #define create_proc_file() do {} while (0)
2230 #define remove_proc_file() do {} while (0)
2231
2232 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2233
2234 /*-------------------------------------------------------------------------*/
2235
2236 /* Release udc structures */
fsl_udc_release(struct device * dev)2237 static void fsl_udc_release(struct device *dev)
2238 {
2239 complete(udc_controller->done);
2240 dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2241 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2242 kfree(udc_controller);
2243 }
2244
2245 /******************************************************************
2246 Internal structure setup functions
2247 *******************************************************************/
2248 /*------------------------------------------------------------------
2249 * init resource for globle controller
2250 * Return the udc handle on success or NULL on failure
2251 ------------------------------------------------------------------*/
struct_udc_setup(struct fsl_udc * udc,struct platform_device * pdev)2252 static int struct_udc_setup(struct fsl_udc *udc,
2253 struct platform_device *pdev)
2254 {
2255 struct fsl_usb2_platform_data *pdata;
2256 size_t size;
2257
2258 pdata = dev_get_platdata(&pdev->dev);
2259 udc->phy_mode = pdata->phy_mode;
2260
2261 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2262 if (!udc->eps)
2263 return -1;
2264
2265 /* initialized QHs, take care of alignment */
2266 size = udc->max_ep * sizeof(struct ep_queue_head);
2267 if (size < QH_ALIGNMENT)
2268 size = QH_ALIGNMENT;
2269 else if ((size % QH_ALIGNMENT) != 0) {
2270 size += QH_ALIGNMENT + 1;
2271 size &= ~(QH_ALIGNMENT - 1);
2272 }
2273 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2274 &udc->ep_qh_dma, GFP_KERNEL);
2275 if (!udc->ep_qh) {
2276 ERR("malloc QHs for udc failed\n");
2277 kfree(udc->eps);
2278 return -1;
2279 }
2280
2281 udc->ep_qh_size = size;
2282
2283 /* Initialize ep0 status request structure */
2284 /* FIXME: fsl_alloc_request() ignores ep argument */
2285 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2286 struct fsl_req, req);
2287 /* allocate a small amount of memory to get valid address */
2288 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2289
2290 udc->resume_state = USB_STATE_NOTATTACHED;
2291 udc->usb_state = USB_STATE_POWERED;
2292 udc->ep0_dir = 0;
2293 udc->remote_wakeup = 0; /* default to 0 on reset */
2294
2295 return 0;
2296 }
2297
2298 /*----------------------------------------------------------------
2299 * Setup the fsl_ep struct for eps
2300 * Link fsl_ep->ep to gadget->ep_list
2301 * ep0out is not used so do nothing here
2302 * ep0in should be taken care
2303 *--------------------------------------------------------------*/
struct_ep_setup(struct fsl_udc * udc,unsigned char index,char * name,int link)2304 static int struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2305 char *name, int link)
2306 {
2307 struct fsl_ep *ep = &udc->eps[index];
2308
2309 ep->udc = udc;
2310 strcpy(ep->name, name);
2311 ep->ep.name = ep->name;
2312
2313 ep->ep.ops = &fsl_ep_ops;
2314 ep->stopped = 0;
2315
2316 /* for ep0: maxP defined in desc
2317 * for other eps, maxP is set by epautoconfig() called by gadget layer
2318 */
2319 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
2320
2321 /* the queue lists any req for this ep */
2322 INIT_LIST_HEAD(&ep->queue);
2323
2324 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2325 if (link)
2326 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2327 ep->gadget = &udc->gadget;
2328 ep->qh = &udc->ep_qh[index];
2329
2330 return 0;
2331 }
2332
2333 /* Driver probe function
2334 * all intialization operations implemented here except enabling usb_intr reg
2335 * board setup should have been done in the platform code
2336 */
fsl_udc_probe(struct platform_device * pdev)2337 static int fsl_udc_probe(struct platform_device *pdev)
2338 {
2339 struct fsl_usb2_platform_data *pdata;
2340 struct resource *res;
2341 int ret = -ENODEV;
2342 unsigned int i;
2343 u32 dccparams;
2344
2345 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2346 if (udc_controller == NULL)
2347 return -ENOMEM;
2348
2349 pdata = dev_get_platdata(&pdev->dev);
2350 udc_controller->pdata = pdata;
2351 spin_lock_init(&udc_controller->lock);
2352 udc_controller->stopped = 1;
2353
2354 #ifdef CONFIG_USB_OTG
2355 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2356 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2357 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2358 ERR("Can't find OTG driver!\n");
2359 ret = -ENODEV;
2360 goto err_kfree;
2361 }
2362 }
2363 #endif
2364
2365 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2366 if (!res) {
2367 ret = -ENXIO;
2368 goto err_kfree;
2369 }
2370
2371 if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2372 if (!request_mem_region(res->start, resource_size(res),
2373 driver_name)) {
2374 ERR("request mem region for %s failed\n", pdev->name);
2375 ret = -EBUSY;
2376 goto err_kfree;
2377 }
2378 }
2379
2380 dr_regs = ioremap(res->start, resource_size(res));
2381 if (!dr_regs) {
2382 ret = -ENOMEM;
2383 goto err_release_mem_region;
2384 }
2385
2386 pdata->regs = (void __iomem *)dr_regs;
2387
2388 /*
2389 * do platform specific init: check the clock, grab/config pins, etc.
2390 */
2391 if (pdata->init && pdata->init(pdev)) {
2392 ret = -ENODEV;
2393 goto err_iounmap_noclk;
2394 }
2395
2396 /* Set accessors only after pdata->init() ! */
2397 fsl_set_accessors(pdata);
2398
2399 #ifndef CONFIG_ARCH_MXC
2400 if (pdata->have_sysif_regs)
2401 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2402 #endif
2403
2404 /* Initialize USB clocks */
2405 ret = fsl_udc_clk_init(pdev);
2406 if (ret < 0)
2407 goto err_iounmap_noclk;
2408
2409 /* Read Device Controller Capability Parameters register */
2410 dccparams = fsl_readl(&dr_regs->dccparams);
2411 if (!(dccparams & DCCPARAMS_DC)) {
2412 ERR("This SOC doesn't support device role\n");
2413 ret = -ENODEV;
2414 goto err_iounmap;
2415 }
2416 /* Get max device endpoints */
2417 /* DEN is bidirectional ep number, max_ep doubles the number */
2418 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2419
2420 udc_controller->irq = platform_get_irq(pdev, 0);
2421 if (!udc_controller->irq) {
2422 ret = -ENODEV;
2423 goto err_iounmap;
2424 }
2425
2426 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2427 driver_name, udc_controller);
2428 if (ret != 0) {
2429 ERR("cannot request irq %d err %d\n",
2430 udc_controller->irq, ret);
2431 goto err_iounmap;
2432 }
2433
2434 /* Initialize the udc structure including QH member and other member */
2435 if (struct_udc_setup(udc_controller, pdev)) {
2436 ERR("Can't initialize udc data structure\n");
2437 ret = -ENOMEM;
2438 goto err_free_irq;
2439 }
2440
2441 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2442 /* initialize usb hw reg except for regs for EP,
2443 * leave usbintr reg untouched */
2444 dr_controller_setup(udc_controller);
2445 }
2446
2447 ret = fsl_udc_clk_finalize(pdev);
2448 if (ret)
2449 goto err_free_irq;
2450
2451 /* Setup gadget structure */
2452 udc_controller->gadget.ops = &fsl_gadget_ops;
2453 udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2454 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2455 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2456 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2457 udc_controller->gadget.name = driver_name;
2458
2459 /* Setup gadget.dev and register with kernel */
2460 dev_set_name(&udc_controller->gadget.dev, "gadget");
2461 udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2462
2463 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2464 udc_controller->gadget.is_otg = 1;
2465
2466 /* setup QH and epctrl for ep0 */
2467 ep0_setup(udc_controller);
2468
2469 /* setup udc->eps[] for ep0 */
2470 struct_ep_setup(udc_controller, 0, "ep0", 0);
2471 /* for ep0: the desc defined here;
2472 * for other eps, gadget layer called ep_enable with defined desc
2473 */
2474 udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2475 usb_ep_set_maxpacket_limit(&udc_controller->eps[0].ep,
2476 USB_MAX_CTRL_PAYLOAD);
2477
2478 /* setup the udc->eps[] for non-control endpoints and link
2479 * to gadget.ep_list */
2480 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2481 char name[14];
2482
2483 sprintf(name, "ep%dout", i);
2484 struct_ep_setup(udc_controller, i * 2, name, 1);
2485 sprintf(name, "ep%din", i);
2486 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2487 }
2488
2489 /* use dma_pool for TD management */
2490 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2491 sizeof(struct ep_td_struct),
2492 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2493 if (udc_controller->td_pool == NULL) {
2494 ret = -ENOMEM;
2495 goto err_free_irq;
2496 }
2497
2498 ret = usb_add_gadget_udc_release(&pdev->dev, &udc_controller->gadget,
2499 fsl_udc_release);
2500 if (ret)
2501 goto err_del_udc;
2502
2503 create_proc_file();
2504 return 0;
2505
2506 err_del_udc:
2507 dma_pool_destroy(udc_controller->td_pool);
2508 err_free_irq:
2509 free_irq(udc_controller->irq, udc_controller);
2510 err_iounmap:
2511 if (pdata->exit)
2512 pdata->exit(pdev);
2513 fsl_udc_clk_release();
2514 err_iounmap_noclk:
2515 iounmap(dr_regs);
2516 err_release_mem_region:
2517 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2518 release_mem_region(res->start, resource_size(res));
2519 err_kfree:
2520 kfree(udc_controller);
2521 udc_controller = NULL;
2522 return ret;
2523 }
2524
2525 /* Driver removal function
2526 * Free resources and finish pending transactions
2527 */
fsl_udc_remove(struct platform_device * pdev)2528 static int fsl_udc_remove(struct platform_device *pdev)
2529 {
2530 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2531 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
2532
2533 DECLARE_COMPLETION_ONSTACK(done);
2534
2535 if (!udc_controller)
2536 return -ENODEV;
2537
2538 udc_controller->done = &done;
2539 usb_del_gadget_udc(&udc_controller->gadget);
2540
2541 fsl_udc_clk_release();
2542
2543 /* DR has been stopped in usb_gadget_unregister_driver() */
2544 remove_proc_file();
2545
2546 /* Free allocated memory */
2547 kfree(udc_controller->status_req->req.buf);
2548 kfree(udc_controller->status_req);
2549 kfree(udc_controller->eps);
2550
2551 dma_pool_destroy(udc_controller->td_pool);
2552 free_irq(udc_controller->irq, udc_controller);
2553 iounmap(dr_regs);
2554 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2555 release_mem_region(res->start, resource_size(res));
2556
2557 /* free udc --wait for the release() finished */
2558 wait_for_completion(&done);
2559
2560 /*
2561 * do platform specific un-initialization:
2562 * release iomux pins, etc.
2563 */
2564 if (pdata->exit)
2565 pdata->exit(pdev);
2566
2567 return 0;
2568 }
2569
2570 /*-----------------------------------------------------------------
2571 * Modify Power management attributes
2572 * Used by OTG statemachine to disable gadget temporarily
2573 -----------------------------------------------------------------*/
fsl_udc_suspend(struct platform_device * pdev,pm_message_t state)2574 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2575 {
2576 dr_controller_stop(udc_controller);
2577 return 0;
2578 }
2579
2580 /*-----------------------------------------------------------------
2581 * Invoked on USB resume. May be called in_interrupt.
2582 * Here we start the DR controller and enable the irq
2583 *-----------------------------------------------------------------*/
fsl_udc_resume(struct platform_device * pdev)2584 static int fsl_udc_resume(struct platform_device *pdev)
2585 {
2586 /* Enable DR irq reg and set controller Run */
2587 if (udc_controller->stopped) {
2588 dr_controller_setup(udc_controller);
2589 dr_controller_run(udc_controller);
2590 }
2591 udc_controller->usb_state = USB_STATE_ATTACHED;
2592 udc_controller->ep0_state = WAIT_FOR_SETUP;
2593 udc_controller->ep0_dir = 0;
2594 return 0;
2595 }
2596
fsl_udc_otg_suspend(struct device * dev,pm_message_t state)2597 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2598 {
2599 struct fsl_udc *udc = udc_controller;
2600 u32 mode, usbcmd;
2601
2602 mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2603
2604 pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2605
2606 /*
2607 * If the controller is already stopped, then this must be a
2608 * PM suspend. Remember this fact, so that we will leave the
2609 * controller stopped at PM resume time.
2610 */
2611 if (udc->stopped) {
2612 pr_debug("gadget already stopped, leaving early\n");
2613 udc->already_stopped = 1;
2614 return 0;
2615 }
2616
2617 if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2618 pr_debug("gadget not in device mode, leaving early\n");
2619 return 0;
2620 }
2621
2622 /* stop the controller */
2623 usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2624 fsl_writel(usbcmd, &dr_regs->usbcmd);
2625
2626 udc->stopped = 1;
2627
2628 pr_info("USB Gadget suspended\n");
2629
2630 return 0;
2631 }
2632
fsl_udc_otg_resume(struct device * dev)2633 static int fsl_udc_otg_resume(struct device *dev)
2634 {
2635 pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
2636 udc_controller->stopped, udc_controller->already_stopped);
2637
2638 /*
2639 * If the controller was stopped at suspend time, then
2640 * don't resume it now.
2641 */
2642 if (udc_controller->already_stopped) {
2643 udc_controller->already_stopped = 0;
2644 pr_debug("gadget was already stopped, leaving early\n");
2645 return 0;
2646 }
2647
2648 pr_info("USB Gadget resume\n");
2649
2650 return fsl_udc_resume(NULL);
2651 }
2652 /*-------------------------------------------------------------------------
2653 Register entry point for the peripheral controller driver
2654 --------------------------------------------------------------------------*/
2655 static const struct platform_device_id fsl_udc_devtype[] = {
2656 {
2657 .name = "imx-udc-mx27",
2658 }, {
2659 .name = "imx-udc-mx51",
2660 }, {
2661 /* sentinel */
2662 }
2663 };
2664 MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
2665 static struct platform_driver udc_driver = {
2666 .remove = fsl_udc_remove,
2667 /* Just for FSL i.mx SoC currently */
2668 .id_table = fsl_udc_devtype,
2669 /* these suspend and resume are not usb suspend and resume */
2670 .suspend = fsl_udc_suspend,
2671 .resume = fsl_udc_resume,
2672 .driver = {
2673 .name = driver_name,
2674 /* udc suspend/resume called from OTG driver */
2675 .suspend = fsl_udc_otg_suspend,
2676 .resume = fsl_udc_otg_resume,
2677 },
2678 };
2679
2680 module_platform_driver_probe(udc_driver, fsl_udc_probe);
2681
2682 MODULE_DESCRIPTION(DRIVER_DESC);
2683 MODULE_AUTHOR(DRIVER_AUTHOR);
2684 MODULE_LICENSE("GPL");
2685 MODULE_ALIAS("platform:fsl-usb2-udc");
2686