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 /*
1253 * Empty complete function used by this driver to fill in the req->complete
1254 * field when creating a request since the complete field is mandatory.
1255 */
fsl_noop_complete(struct usb_ep * ep,struct usb_request * req)1256 static void fsl_noop_complete(struct usb_ep *ep, struct usb_request *req) { }
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 int ret;
1278
1279 if (direction == EP_DIR_IN)
1280 udc->ep0_dir = USB_DIR_IN;
1281 else
1282 udc->ep0_dir = USB_DIR_OUT;
1283
1284 ep = &udc->eps[0];
1285 if (udc->ep0_state != DATA_STATE_XMIT)
1286 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1287
1288 req->ep = ep;
1289 req->req.length = 0;
1290 req->req.status = -EINPROGRESS;
1291 req->req.actual = 0;
1292 req->req.complete = fsl_noop_complete;
1293 req->dtd_count = 0;
1294
1295 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1296 if (ret)
1297 return ret;
1298
1299 if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1300 fsl_queue_td(ep, req);
1301 else
1302 return -ENOMEM;
1303
1304 list_add_tail(&req->queue, &ep->queue);
1305
1306 return 0;
1307 }
1308
udc_reset_ep_queue(struct fsl_udc * udc,u8 pipe)1309 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1310 {
1311 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1312
1313 if (ep->ep.name)
1314 nuke(ep, -ESHUTDOWN);
1315 }
1316
1317 /*
1318 * ch9 Set address
1319 */
ch9setaddress(struct fsl_udc * udc,u16 value,u16 index,u16 length)1320 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1321 {
1322 /* Save the new address to device struct */
1323 udc->device_address = (u8) value;
1324 /* Update usb state */
1325 udc->usb_state = USB_STATE_ADDRESS;
1326 /* Status phase */
1327 if (ep0_prime_status(udc, EP_DIR_IN))
1328 ep0stall(udc);
1329 }
1330
1331 /*
1332 * ch9 Get status
1333 */
ch9getstatus(struct fsl_udc * udc,u8 request_type,u16 value,u16 index,u16 length)1334 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1335 u16 index, u16 length)
1336 {
1337 u16 tmp = 0; /* Status, cpu endian */
1338 struct fsl_req *req;
1339 struct fsl_ep *ep;
1340 int ret;
1341
1342 ep = &udc->eps[0];
1343
1344 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1345 /* Get device status */
1346 tmp = udc->gadget.is_selfpowered;
1347 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1348 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1349 /* Get interface status */
1350 /* We don't have interface information in udc driver */
1351 tmp = 0;
1352 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1353 /* Get endpoint status */
1354 struct fsl_ep *target_ep;
1355
1356 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1357
1358 /* stall if endpoint doesn't exist */
1359 if (!target_ep->ep.desc)
1360 goto stall;
1361 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1362 << USB_ENDPOINT_HALT;
1363 }
1364
1365 udc->ep0_dir = USB_DIR_IN;
1366 /* Borrow the per device status_req */
1367 req = udc->status_req;
1368 /* Fill in the reqest structure */
1369 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1370
1371 req->ep = ep;
1372 req->req.length = 2;
1373 req->req.status = -EINPROGRESS;
1374 req->req.actual = 0;
1375 req->req.complete = fsl_noop_complete;
1376 req->dtd_count = 0;
1377
1378 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1379 if (ret)
1380 goto stall;
1381
1382 /* prime the data phase */
1383 if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1384 fsl_queue_td(ep, req);
1385 else /* no mem */
1386 goto stall;
1387
1388 list_add_tail(&req->queue, &ep->queue);
1389 udc->ep0_state = DATA_STATE_XMIT;
1390 if (ep0_prime_status(udc, EP_DIR_OUT))
1391 ep0stall(udc);
1392
1393 return;
1394 stall:
1395 ep0stall(udc);
1396 }
1397
setup_received_irq(struct fsl_udc * udc,struct usb_ctrlrequest * setup)1398 static void setup_received_irq(struct fsl_udc *udc,
1399 struct usb_ctrlrequest *setup)
1400 __releases(udc->lock)
1401 __acquires(udc->lock)
1402 {
1403 u16 wValue = le16_to_cpu(setup->wValue);
1404 u16 wIndex = le16_to_cpu(setup->wIndex);
1405 u16 wLength = le16_to_cpu(setup->wLength);
1406
1407 udc_reset_ep_queue(udc, 0);
1408
1409 /* We process some stardard setup requests here */
1410 switch (setup->bRequest) {
1411 case USB_REQ_GET_STATUS:
1412 /* Data+Status phase from udc */
1413 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1414 != (USB_DIR_IN | USB_TYPE_STANDARD))
1415 break;
1416 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1417 return;
1418
1419 case USB_REQ_SET_ADDRESS:
1420 /* Status phase from udc */
1421 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1422 | USB_RECIP_DEVICE))
1423 break;
1424 ch9setaddress(udc, wValue, wIndex, wLength);
1425 return;
1426
1427 case USB_REQ_CLEAR_FEATURE:
1428 case USB_REQ_SET_FEATURE:
1429 /* Status phase from udc */
1430 {
1431 int rc = -EOPNOTSUPP;
1432 u16 ptc = 0;
1433
1434 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1435 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1436 int pipe = get_pipe_by_windex(wIndex);
1437 struct fsl_ep *ep;
1438
1439 if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1440 break;
1441 ep = get_ep_by_pipe(udc, pipe);
1442
1443 spin_unlock(&udc->lock);
1444 rc = fsl_ep_set_halt(&ep->ep,
1445 (setup->bRequest == USB_REQ_SET_FEATURE)
1446 ? 1 : 0);
1447 spin_lock(&udc->lock);
1448
1449 } else if ((setup->bRequestType & (USB_RECIP_MASK
1450 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1451 | USB_TYPE_STANDARD)) {
1452 /* Note: The driver has not include OTG support yet.
1453 * This will be set when OTG support is added */
1454 if (wValue == USB_DEVICE_TEST_MODE)
1455 ptc = wIndex >> 8;
1456 else if (gadget_is_otg(&udc->gadget)) {
1457 if (setup->bRequest ==
1458 USB_DEVICE_B_HNP_ENABLE)
1459 udc->gadget.b_hnp_enable = 1;
1460 else if (setup->bRequest ==
1461 USB_DEVICE_A_HNP_SUPPORT)
1462 udc->gadget.a_hnp_support = 1;
1463 else if (setup->bRequest ==
1464 USB_DEVICE_A_ALT_HNP_SUPPORT)
1465 udc->gadget.a_alt_hnp_support = 1;
1466 }
1467 rc = 0;
1468 } else
1469 break;
1470
1471 if (rc == 0) {
1472 if (ep0_prime_status(udc, EP_DIR_IN))
1473 ep0stall(udc);
1474 }
1475 if (ptc) {
1476 u32 tmp;
1477
1478 mdelay(10);
1479 tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1480 fsl_writel(tmp, &dr_regs->portsc1);
1481 printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1482 }
1483
1484 return;
1485 }
1486
1487 default:
1488 break;
1489 }
1490
1491 /* Requests handled by gadget */
1492 if (wLength) {
1493 /* Data phase from gadget, status phase from udc */
1494 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1495 ? USB_DIR_IN : USB_DIR_OUT;
1496 spin_unlock(&udc->lock);
1497 if (udc->driver->setup(&udc->gadget,
1498 &udc->local_setup_buff) < 0)
1499 ep0stall(udc);
1500 spin_lock(&udc->lock);
1501 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1502 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1503 /*
1504 * If the data stage is IN, send status prime immediately.
1505 * See 2.0 Spec chapter 8.5.3.3 for detail.
1506 */
1507 if (udc->ep0_state == DATA_STATE_XMIT)
1508 if (ep0_prime_status(udc, EP_DIR_OUT))
1509 ep0stall(udc);
1510
1511 } else {
1512 /* No data phase, IN status from gadget */
1513 udc->ep0_dir = USB_DIR_IN;
1514 spin_unlock(&udc->lock);
1515 if (udc->driver->setup(&udc->gadget,
1516 &udc->local_setup_buff) < 0)
1517 ep0stall(udc);
1518 spin_lock(&udc->lock);
1519 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1520 }
1521 }
1522
1523 /* Process request for Data or Status phase of ep0
1524 * prime status phase if needed */
ep0_req_complete(struct fsl_udc * udc,struct fsl_ep * ep0,struct fsl_req * req)1525 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1526 struct fsl_req *req)
1527 {
1528 if (udc->usb_state == USB_STATE_ADDRESS) {
1529 /* Set the new address */
1530 u32 new_address = (u32) udc->device_address;
1531 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1532 &dr_regs->deviceaddr);
1533 }
1534
1535 done(ep0, req, 0);
1536
1537 switch (udc->ep0_state) {
1538 case DATA_STATE_XMIT:
1539 /* already primed at setup_received_irq */
1540 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1541 break;
1542 case DATA_STATE_RECV:
1543 /* send status phase */
1544 if (ep0_prime_status(udc, EP_DIR_IN))
1545 ep0stall(udc);
1546 break;
1547 case WAIT_FOR_OUT_STATUS:
1548 udc->ep0_state = WAIT_FOR_SETUP;
1549 break;
1550 case WAIT_FOR_SETUP:
1551 ERR("Unexpect ep0 packets\n");
1552 break;
1553 default:
1554 ep0stall(udc);
1555 break;
1556 }
1557 }
1558
1559 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1560 * being corrupted by another incoming setup packet */
tripwire_handler(struct fsl_udc * udc,u8 ep_num,u8 * buffer_ptr)1561 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1562 {
1563 u32 temp;
1564 struct ep_queue_head *qh;
1565 struct fsl_usb2_platform_data *pdata = udc->pdata;
1566
1567 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1568
1569 /* Clear bit in ENDPTSETUPSTAT */
1570 temp = fsl_readl(&dr_regs->endptsetupstat);
1571 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1572
1573 /* while a hazard exists when setup package arrives */
1574 do {
1575 /* Set Setup Tripwire */
1576 temp = fsl_readl(&dr_regs->usbcmd);
1577 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1578
1579 /* Copy the setup packet to local buffer */
1580 if (pdata->le_setup_buf) {
1581 u32 *p = (u32 *)buffer_ptr;
1582 u32 *s = (u32 *)qh->setup_buffer;
1583
1584 /* Convert little endian setup buffer to CPU endian */
1585 *p++ = le32_to_cpu(*s++);
1586 *p = le32_to_cpu(*s);
1587 } else {
1588 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1589 }
1590 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1591
1592 /* Clear Setup Tripwire */
1593 temp = fsl_readl(&dr_regs->usbcmd);
1594 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1595 }
1596
1597 /* process-ep_req(): free the completed Tds for this req */
process_ep_req(struct fsl_udc * udc,int pipe,struct fsl_req * curr_req)1598 static int process_ep_req(struct fsl_udc *udc, int pipe,
1599 struct fsl_req *curr_req)
1600 {
1601 struct ep_td_struct *curr_td;
1602 int td_complete, actual, remaining_length, j, tmp;
1603 int status = 0;
1604 int errors = 0;
1605 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1606 int direction = pipe % 2;
1607
1608 curr_td = curr_req->head;
1609 td_complete = 0;
1610 actual = curr_req->req.length;
1611
1612 for (j = 0; j < curr_req->dtd_count; j++) {
1613 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1614 & DTD_PACKET_SIZE)
1615 >> DTD_LENGTH_BIT_POS;
1616 actual -= remaining_length;
1617
1618 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1619 if (errors & DTD_ERROR_MASK) {
1620 if (errors & DTD_STATUS_HALTED) {
1621 ERR("dTD error %08x QH=%d\n", errors, pipe);
1622 /* Clear the errors and Halt condition */
1623 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1624 tmp &= ~errors;
1625 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1626 status = -EPIPE;
1627 /* FIXME: continue with next queued TD? */
1628
1629 break;
1630 }
1631 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1632 VDBG("Transfer overflow");
1633 status = -EPROTO;
1634 break;
1635 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1636 VDBG("ISO error");
1637 status = -EILSEQ;
1638 break;
1639 } else
1640 ERR("Unknown error has occurred (0x%x)!\n",
1641 errors);
1642
1643 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1644 & DTD_STATUS_ACTIVE) {
1645 VDBG("Request not complete");
1646 status = REQ_UNCOMPLETE;
1647 return status;
1648 } else if (remaining_length) {
1649 if (direction) {
1650 VDBG("Transmit dTD remaining length not zero");
1651 status = -EPROTO;
1652 break;
1653 } else {
1654 td_complete++;
1655 break;
1656 }
1657 } else {
1658 td_complete++;
1659 VDBG("dTD transmitted successful");
1660 }
1661
1662 if (j != curr_req->dtd_count - 1)
1663 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1664 }
1665
1666 if (status)
1667 return status;
1668
1669 curr_req->req.actual = actual;
1670
1671 return 0;
1672 }
1673
1674 /* Process a DTD completion interrupt */
dtd_complete_irq(struct fsl_udc * udc)1675 static void dtd_complete_irq(struct fsl_udc *udc)
1676 {
1677 u32 bit_pos;
1678 int i, ep_num, direction, bit_mask, status;
1679 struct fsl_ep *curr_ep;
1680 struct fsl_req *curr_req, *temp_req;
1681
1682 /* Clear the bits in the register */
1683 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1684 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1685
1686 if (!bit_pos)
1687 return;
1688
1689 for (i = 0; i < udc->max_ep; i++) {
1690 ep_num = i >> 1;
1691 direction = i % 2;
1692
1693 bit_mask = 1 << (ep_num + 16 * direction);
1694
1695 if (!(bit_pos & bit_mask))
1696 continue;
1697
1698 curr_ep = get_ep_by_pipe(udc, i);
1699
1700 /* If the ep is configured */
1701 if (!curr_ep->ep.name) {
1702 WARNING("Invalid EP?");
1703 continue;
1704 }
1705
1706 /* process the req queue until an uncomplete request */
1707 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1708 queue) {
1709 status = process_ep_req(udc, i, curr_req);
1710
1711 VDBG("status of process_ep_req= %d, ep = %d",
1712 status, ep_num);
1713 if (status == REQ_UNCOMPLETE)
1714 break;
1715 /* write back status to req */
1716 curr_req->req.status = status;
1717
1718 if (ep_num == 0) {
1719 ep0_req_complete(udc, curr_ep, curr_req);
1720 break;
1721 } else
1722 done(curr_ep, curr_req, status);
1723 }
1724 }
1725 }
1726
portscx_device_speed(u32 reg)1727 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1728 {
1729 switch (reg & PORTSCX_PORT_SPEED_MASK) {
1730 case PORTSCX_PORT_SPEED_HIGH:
1731 return USB_SPEED_HIGH;
1732 case PORTSCX_PORT_SPEED_FULL:
1733 return USB_SPEED_FULL;
1734 case PORTSCX_PORT_SPEED_LOW:
1735 return USB_SPEED_LOW;
1736 default:
1737 return USB_SPEED_UNKNOWN;
1738 }
1739 }
1740
1741 /* Process a port change interrupt */
port_change_irq(struct fsl_udc * udc)1742 static void port_change_irq(struct fsl_udc *udc)
1743 {
1744 if (udc->bus_reset)
1745 udc->bus_reset = 0;
1746
1747 /* Bus resetting is finished */
1748 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1749 /* Get the speed */
1750 udc->gadget.speed =
1751 portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1752
1753 /* Update USB state */
1754 if (!udc->resume_state)
1755 udc->usb_state = USB_STATE_DEFAULT;
1756 }
1757
1758 /* Process suspend interrupt */
suspend_irq(struct fsl_udc * udc)1759 static void suspend_irq(struct fsl_udc *udc)
1760 {
1761 udc->resume_state = udc->usb_state;
1762 udc->usb_state = USB_STATE_SUSPENDED;
1763
1764 /* report suspend to the driver, serial.c does not support this */
1765 if (udc->driver->suspend)
1766 udc->driver->suspend(&udc->gadget);
1767 }
1768
bus_resume(struct fsl_udc * udc)1769 static void bus_resume(struct fsl_udc *udc)
1770 {
1771 udc->usb_state = udc->resume_state;
1772 udc->resume_state = 0;
1773
1774 /* report resume to the driver, serial.c does not support this */
1775 if (udc->driver->resume)
1776 udc->driver->resume(&udc->gadget);
1777 }
1778
1779 /* Clear up all ep queues */
reset_queues(struct fsl_udc * udc,bool bus_reset)1780 static int reset_queues(struct fsl_udc *udc, bool bus_reset)
1781 {
1782 u8 pipe;
1783
1784 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1785 udc_reset_ep_queue(udc, pipe);
1786
1787 /* report disconnect; the driver is already quiesced */
1788 spin_unlock(&udc->lock);
1789 if (bus_reset)
1790 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1791 else
1792 udc->driver->disconnect(&udc->gadget);
1793 spin_lock(&udc->lock);
1794
1795 return 0;
1796 }
1797
1798 /* Process reset interrupt */
reset_irq(struct fsl_udc * udc)1799 static void reset_irq(struct fsl_udc *udc)
1800 {
1801 u32 temp;
1802 unsigned long timeout;
1803
1804 /* Clear the device address */
1805 temp = fsl_readl(&dr_regs->deviceaddr);
1806 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1807
1808 udc->device_address = 0;
1809
1810 /* Clear usb state */
1811 udc->resume_state = 0;
1812 udc->ep0_dir = 0;
1813 udc->ep0_state = WAIT_FOR_SETUP;
1814 udc->remote_wakeup = 0; /* default to 0 on reset */
1815 udc->gadget.b_hnp_enable = 0;
1816 udc->gadget.a_hnp_support = 0;
1817 udc->gadget.a_alt_hnp_support = 0;
1818
1819 /* Clear all the setup token semaphores */
1820 temp = fsl_readl(&dr_regs->endptsetupstat);
1821 fsl_writel(temp, &dr_regs->endptsetupstat);
1822
1823 /* Clear all the endpoint complete status bits */
1824 temp = fsl_readl(&dr_regs->endptcomplete);
1825 fsl_writel(temp, &dr_regs->endptcomplete);
1826
1827 timeout = jiffies + 100;
1828 while (fsl_readl(&dr_regs->endpointprime)) {
1829 /* Wait until all endptprime bits cleared */
1830 if (time_after(jiffies, timeout)) {
1831 ERR("Timeout for reset\n");
1832 break;
1833 }
1834 cpu_relax();
1835 }
1836
1837 /* Write 1s to the flush register */
1838 fsl_writel(0xffffffff, &dr_regs->endptflush);
1839
1840 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1841 VDBG("Bus reset");
1842 /* Bus is reseting */
1843 udc->bus_reset = 1;
1844 /* Reset all the queues, include XD, dTD, EP queue
1845 * head and TR Queue */
1846 reset_queues(udc, true);
1847 udc->usb_state = USB_STATE_DEFAULT;
1848 } else {
1849 VDBG("Controller reset");
1850 /* initialize usb hw reg except for regs for EP, not
1851 * touch usbintr reg */
1852 dr_controller_setup(udc);
1853
1854 /* Reset all internal used Queues */
1855 reset_queues(udc, false);
1856
1857 ep0_setup(udc);
1858
1859 /* Enable DR IRQ reg, Set Run bit, change udc state */
1860 dr_controller_run(udc);
1861 udc->usb_state = USB_STATE_ATTACHED;
1862 }
1863 }
1864
1865 /*
1866 * USB device controller interrupt handler
1867 */
fsl_udc_irq(int irq,void * _udc)1868 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1869 {
1870 struct fsl_udc *udc = _udc;
1871 u32 irq_src;
1872 irqreturn_t status = IRQ_NONE;
1873 unsigned long flags;
1874
1875 /* Disable ISR for OTG host mode */
1876 if (udc->stopped)
1877 return IRQ_NONE;
1878 spin_lock_irqsave(&udc->lock, flags);
1879 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1880 /* Clear notification bits */
1881 fsl_writel(irq_src, &dr_regs->usbsts);
1882
1883 /* VDBG("irq_src [0x%8x]", irq_src); */
1884
1885 /* Need to resume? */
1886 if (udc->usb_state == USB_STATE_SUSPENDED)
1887 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1888 bus_resume(udc);
1889
1890 /* USB Interrupt */
1891 if (irq_src & USB_STS_INT) {
1892 VDBG("Packet int");
1893 /* Setup package, we only support ep0 as control ep */
1894 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1895 tripwire_handler(udc, 0,
1896 (u8 *) (&udc->local_setup_buff));
1897 setup_received_irq(udc, &udc->local_setup_buff);
1898 status = IRQ_HANDLED;
1899 }
1900
1901 /* completion of dtd */
1902 if (fsl_readl(&dr_regs->endptcomplete)) {
1903 dtd_complete_irq(udc);
1904 status = IRQ_HANDLED;
1905 }
1906 }
1907
1908 /* SOF (for ISO transfer) */
1909 if (irq_src & USB_STS_SOF) {
1910 status = IRQ_HANDLED;
1911 }
1912
1913 /* Port Change */
1914 if (irq_src & USB_STS_PORT_CHANGE) {
1915 port_change_irq(udc);
1916 status = IRQ_HANDLED;
1917 }
1918
1919 /* Reset Received */
1920 if (irq_src & USB_STS_RESET) {
1921 VDBG("reset int");
1922 reset_irq(udc);
1923 status = IRQ_HANDLED;
1924 }
1925
1926 /* Sleep Enable (Suspend) */
1927 if (irq_src & USB_STS_SUSPEND) {
1928 suspend_irq(udc);
1929 status = IRQ_HANDLED;
1930 }
1931
1932 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1933 VDBG("Error IRQ %x", irq_src);
1934 }
1935
1936 spin_unlock_irqrestore(&udc->lock, flags);
1937 return status;
1938 }
1939
1940 /*----------------------------------------------------------------*
1941 * Hook to gadget drivers
1942 * Called by initialization code of gadget drivers
1943 *----------------------------------------------------------------*/
fsl_udc_start(struct usb_gadget * g,struct usb_gadget_driver * driver)1944 static int fsl_udc_start(struct usb_gadget *g,
1945 struct usb_gadget_driver *driver)
1946 {
1947 int retval = 0;
1948 unsigned long flags = 0;
1949
1950 /* lock is needed but whether should use this lock or another */
1951 spin_lock_irqsave(&udc_controller->lock, flags);
1952
1953 driver->driver.bus = NULL;
1954 /* hook up the driver */
1955 udc_controller->driver = driver;
1956 spin_unlock_irqrestore(&udc_controller->lock, flags);
1957 g->is_selfpowered = 1;
1958
1959 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1960 /* Suspend the controller until OTG enable it */
1961 udc_controller->stopped = 1;
1962 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1963
1964 /* connect to bus through transceiver */
1965 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1966 retval = otg_set_peripheral(
1967 udc_controller->transceiver->otg,
1968 &udc_controller->gadget);
1969 if (retval < 0) {
1970 ERR("can't bind to transceiver\n");
1971 udc_controller->driver = NULL;
1972 return retval;
1973 }
1974 }
1975 } else {
1976 /* Enable DR IRQ reg and set USBCMD reg Run bit */
1977 dr_controller_run(udc_controller);
1978 udc_controller->usb_state = USB_STATE_ATTACHED;
1979 udc_controller->ep0_state = WAIT_FOR_SETUP;
1980 udc_controller->ep0_dir = 0;
1981 }
1982
1983 return retval;
1984 }
1985
1986 /* Disconnect from gadget driver */
fsl_udc_stop(struct usb_gadget * g)1987 static int fsl_udc_stop(struct usb_gadget *g)
1988 {
1989 struct fsl_ep *loop_ep;
1990 unsigned long flags;
1991
1992 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
1993 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
1994
1995 /* stop DR, disable intr */
1996 dr_controller_stop(udc_controller);
1997
1998 /* in fact, no needed */
1999 udc_controller->usb_state = USB_STATE_ATTACHED;
2000 udc_controller->ep0_state = WAIT_FOR_SETUP;
2001 udc_controller->ep0_dir = 0;
2002
2003 /* stand operation */
2004 spin_lock_irqsave(&udc_controller->lock, flags);
2005 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2006 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2007 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2008 ep.ep_list)
2009 nuke(loop_ep, -ESHUTDOWN);
2010 spin_unlock_irqrestore(&udc_controller->lock, flags);
2011
2012 udc_controller->driver = NULL;
2013
2014 return 0;
2015 }
2016
2017 /*-------------------------------------------------------------------------
2018 PROC File System Support
2019 -------------------------------------------------------------------------*/
2020 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2021
2022 #include <linux/seq_file.h>
2023
2024 static const char proc_filename[] = "driver/fsl_usb2_udc";
2025
fsl_proc_read(struct seq_file * m,void * v)2026 static int fsl_proc_read(struct seq_file *m, void *v)
2027 {
2028 unsigned long flags;
2029 int i;
2030 u32 tmp_reg;
2031 struct fsl_ep *ep = NULL;
2032 struct fsl_req *req;
2033
2034 struct fsl_udc *udc = udc_controller;
2035
2036 spin_lock_irqsave(&udc->lock, flags);
2037
2038 /* ------basic driver information ---- */
2039 seq_printf(m,
2040 DRIVER_DESC "\n"
2041 "%s version: %s\n"
2042 "Gadget driver: %s\n\n",
2043 driver_name, DRIVER_VERSION,
2044 udc->driver ? udc->driver->driver.name : "(none)");
2045
2046 /* ------ DR Registers ----- */
2047 tmp_reg = fsl_readl(&dr_regs->usbcmd);
2048 seq_printf(m,
2049 "USBCMD reg:\n"
2050 "SetupTW: %d\n"
2051 "Run/Stop: %s\n\n",
2052 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2053 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2054
2055 tmp_reg = fsl_readl(&dr_regs->usbsts);
2056 seq_printf(m,
2057 "USB Status Reg:\n"
2058 "Dr Suspend: %d Reset Received: %d System Error: %s "
2059 "USB Error Interrupt: %s\n\n",
2060 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2061 (tmp_reg & USB_STS_RESET) ? 1 : 0,
2062 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2063 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2064
2065 tmp_reg = fsl_readl(&dr_regs->usbintr);
2066 seq_printf(m,
2067 "USB Interrupt Enable Reg:\n"
2068 "Sleep Enable: %d SOF Received Enable: %d "
2069 "Reset Enable: %d\n"
2070 "System Error Enable: %d "
2071 "Port Change Dectected Enable: %d\n"
2072 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2073 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2074 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2075 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2076 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2077 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2078 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2079 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2080
2081 tmp_reg = fsl_readl(&dr_regs->frindex);
2082 seq_printf(m,
2083 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2084 (tmp_reg & USB_FRINDEX_MASKS));
2085
2086 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2087 seq_printf(m,
2088 "USB Device Address Reg: Device Addr is 0x%x\n\n",
2089 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2090
2091 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2092 seq_printf(m,
2093 "USB Endpoint List Address Reg: "
2094 "Device Addr is 0x%x\n\n",
2095 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2096
2097 tmp_reg = fsl_readl(&dr_regs->portsc1);
2098 seq_printf(m,
2099 "USB Port Status&Control Reg:\n"
2100 "Port Transceiver Type : %s Port Speed: %s\n"
2101 "PHY Low Power Suspend: %s Port Reset: %s "
2102 "Port Suspend Mode: %s\n"
2103 "Over-current Change: %s "
2104 "Port Enable/Disable Change: %s\n"
2105 "Port Enabled/Disabled: %s "
2106 "Current Connect Status: %s\n\n", ( {
2107 const char *s;
2108 switch (tmp_reg & PORTSCX_PTS_FSLS) {
2109 case PORTSCX_PTS_UTMI:
2110 s = "UTMI"; break;
2111 case PORTSCX_PTS_ULPI:
2112 s = "ULPI "; break;
2113 case PORTSCX_PTS_FSLS:
2114 s = "FS/LS Serial"; break;
2115 default:
2116 s = "None"; break;
2117 }
2118 s;} ),
2119 usb_speed_string(portscx_device_speed(tmp_reg)),
2120 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2121 "Normal PHY mode" : "Low power mode",
2122 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2123 "Not in Reset",
2124 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2125 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2126 "No",
2127 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2128 "Not change",
2129 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2130 "Not correct",
2131 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2132 "Attached" : "Not-Att");
2133
2134 tmp_reg = fsl_readl(&dr_regs->usbmode);
2135 seq_printf(m,
2136 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2137 const char *s;
2138 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2139 case USB_MODE_CTRL_MODE_IDLE:
2140 s = "Idle"; break;
2141 case USB_MODE_CTRL_MODE_DEVICE:
2142 s = "Device Controller"; break;
2143 case USB_MODE_CTRL_MODE_HOST:
2144 s = "Host Controller"; break;
2145 default:
2146 s = "None"; break;
2147 }
2148 s;
2149 } ));
2150
2151 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2152 seq_printf(m,
2153 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2154 (tmp_reg & EP_SETUP_STATUS_MASK));
2155
2156 for (i = 0; i < udc->max_ep / 2; i++) {
2157 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2158 seq_printf(m, "EP Ctrl Reg [0x%x]: = [0x%x]\n", i, tmp_reg);
2159 }
2160 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2161 seq_printf(m, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2162
2163 #ifndef CONFIG_ARCH_MXC
2164 if (udc->pdata->have_sysif_regs) {
2165 tmp_reg = usb_sys_regs->snoop1;
2166 seq_printf(m, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2167
2168 tmp_reg = usb_sys_regs->control;
2169 seq_printf(m, "General Control Reg : = [0x%x]\n\n", tmp_reg);
2170 }
2171 #endif
2172
2173 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2174 ep = &udc->eps[0];
2175 seq_printf(m, "For %s Maxpkt is 0x%x index is 0x%x\n",
2176 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2177
2178 if (list_empty(&ep->queue)) {
2179 seq_puts(m, "its req queue is empty\n\n");
2180 } else {
2181 list_for_each_entry(req, &ep->queue, queue) {
2182 seq_printf(m,
2183 "req %p actual 0x%x length 0x%x buf %p\n",
2184 &req->req, req->req.actual,
2185 req->req.length, req->req.buf);
2186 }
2187 }
2188 /* other gadget->eplist ep */
2189 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2190 if (ep->ep.desc) {
2191 seq_printf(m,
2192 "\nFor %s Maxpkt is 0x%x "
2193 "index is 0x%x\n",
2194 ep->ep.name, ep_maxpacket(ep),
2195 ep_index(ep));
2196
2197 if (list_empty(&ep->queue)) {
2198 seq_puts(m, "its req queue is empty\n\n");
2199 } else {
2200 list_for_each_entry(req, &ep->queue, queue) {
2201 seq_printf(m,
2202 "req %p actual 0x%x length "
2203 "0x%x buf %p\n",
2204 &req->req, req->req.actual,
2205 req->req.length, req->req.buf);
2206 } /* end for each_entry of ep req */
2207 } /* end for else */
2208 } /* end for if(ep->queue) */
2209 } /* end (ep->desc) */
2210
2211 spin_unlock_irqrestore(&udc->lock, flags);
2212 return 0;
2213 }
2214
2215 /*
2216 * seq_file wrappers for procfile show routines.
2217 */
fsl_proc_open(struct inode * inode,struct file * file)2218 static int fsl_proc_open(struct inode *inode, struct file *file)
2219 {
2220 return single_open(file, fsl_proc_read, NULL);
2221 }
2222
2223 static const struct file_operations fsl_proc_fops = {
2224 .open = fsl_proc_open,
2225 .read = seq_read,
2226 .llseek = seq_lseek,
2227 .release = single_release,
2228 };
2229
2230 #define create_proc_file() proc_create(proc_filename, 0, NULL, &fsl_proc_fops)
2231 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2232
2233 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2234
2235 #define create_proc_file() do {} while (0)
2236 #define remove_proc_file() do {} while (0)
2237
2238 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2239
2240 /*-------------------------------------------------------------------------*/
2241
2242 /* Release udc structures */
fsl_udc_release(struct device * dev)2243 static void fsl_udc_release(struct device *dev)
2244 {
2245 complete(udc_controller->done);
2246 dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2247 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2248 kfree(udc_controller);
2249 }
2250
2251 /******************************************************************
2252 Internal structure setup functions
2253 *******************************************************************/
2254 /*------------------------------------------------------------------
2255 * init resource for globle controller
2256 * Return the udc handle on success or NULL on failure
2257 ------------------------------------------------------------------*/
struct_udc_setup(struct fsl_udc * udc,struct platform_device * pdev)2258 static int struct_udc_setup(struct fsl_udc *udc,
2259 struct platform_device *pdev)
2260 {
2261 struct fsl_usb2_platform_data *pdata;
2262 size_t size;
2263
2264 pdata = dev_get_platdata(&pdev->dev);
2265 udc->phy_mode = pdata->phy_mode;
2266
2267 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2268 if (!udc->eps)
2269 return -1;
2270
2271 /* initialized QHs, take care of alignment */
2272 size = udc->max_ep * sizeof(struct ep_queue_head);
2273 if (size < QH_ALIGNMENT)
2274 size = QH_ALIGNMENT;
2275 else if ((size % QH_ALIGNMENT) != 0) {
2276 size += QH_ALIGNMENT + 1;
2277 size &= ~(QH_ALIGNMENT - 1);
2278 }
2279 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2280 &udc->ep_qh_dma, GFP_KERNEL);
2281 if (!udc->ep_qh) {
2282 ERR("malloc QHs for udc failed\n");
2283 kfree(udc->eps);
2284 return -1;
2285 }
2286
2287 udc->ep_qh_size = size;
2288
2289 /* Initialize ep0 status request structure */
2290 /* FIXME: fsl_alloc_request() ignores ep argument */
2291 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2292 struct fsl_req, req);
2293 /* allocate a small amount of memory to get valid address */
2294 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2295
2296 udc->resume_state = USB_STATE_NOTATTACHED;
2297 udc->usb_state = USB_STATE_POWERED;
2298 udc->ep0_dir = 0;
2299 udc->remote_wakeup = 0; /* default to 0 on reset */
2300
2301 return 0;
2302 }
2303
2304 /*----------------------------------------------------------------
2305 * Setup the fsl_ep struct for eps
2306 * Link fsl_ep->ep to gadget->ep_list
2307 * ep0out is not used so do nothing here
2308 * ep0in should be taken care
2309 *--------------------------------------------------------------*/
struct_ep_setup(struct fsl_udc * udc,unsigned char index,char * name,int link)2310 static int struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2311 char *name, int link)
2312 {
2313 struct fsl_ep *ep = &udc->eps[index];
2314
2315 ep->udc = udc;
2316 strcpy(ep->name, name);
2317 ep->ep.name = ep->name;
2318
2319 ep->ep.ops = &fsl_ep_ops;
2320 ep->stopped = 0;
2321
2322 if (index == 0) {
2323 ep->ep.caps.type_control = true;
2324 } else {
2325 ep->ep.caps.type_iso = true;
2326 ep->ep.caps.type_bulk = true;
2327 ep->ep.caps.type_int = true;
2328 }
2329
2330 if (index & 1)
2331 ep->ep.caps.dir_in = true;
2332 else
2333 ep->ep.caps.dir_out = true;
2334
2335 /* for ep0: maxP defined in desc
2336 * for other eps, maxP is set by epautoconfig() called by gadget layer
2337 */
2338 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
2339
2340 /* the queue lists any req for this ep */
2341 INIT_LIST_HEAD(&ep->queue);
2342
2343 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2344 if (link)
2345 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2346 ep->gadget = &udc->gadget;
2347 ep->qh = &udc->ep_qh[index];
2348
2349 return 0;
2350 }
2351
2352 /* Driver probe function
2353 * all intialization operations implemented here except enabling usb_intr reg
2354 * board setup should have been done in the platform code
2355 */
fsl_udc_probe(struct platform_device * pdev)2356 static int fsl_udc_probe(struct platform_device *pdev)
2357 {
2358 struct fsl_usb2_platform_data *pdata;
2359 struct resource *res;
2360 int ret = -ENODEV;
2361 unsigned int i;
2362 u32 dccparams;
2363
2364 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2365 if (udc_controller == NULL)
2366 return -ENOMEM;
2367
2368 pdata = dev_get_platdata(&pdev->dev);
2369 udc_controller->pdata = pdata;
2370 spin_lock_init(&udc_controller->lock);
2371 udc_controller->stopped = 1;
2372
2373 #ifdef CONFIG_USB_OTG
2374 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2375 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2376 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2377 ERR("Can't find OTG driver!\n");
2378 ret = -ENODEV;
2379 goto err_kfree;
2380 }
2381 }
2382 #endif
2383
2384 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2385 if (!res) {
2386 ret = -ENXIO;
2387 goto err_kfree;
2388 }
2389
2390 if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2391 if (!request_mem_region(res->start, resource_size(res),
2392 driver_name)) {
2393 ERR("request mem region for %s failed\n", pdev->name);
2394 ret = -EBUSY;
2395 goto err_kfree;
2396 }
2397 }
2398
2399 dr_regs = ioremap(res->start, resource_size(res));
2400 if (!dr_regs) {
2401 ret = -ENOMEM;
2402 goto err_release_mem_region;
2403 }
2404
2405 pdata->regs = (void __iomem *)dr_regs;
2406
2407 /*
2408 * do platform specific init: check the clock, grab/config pins, etc.
2409 */
2410 if (pdata->init && pdata->init(pdev)) {
2411 ret = -ENODEV;
2412 goto err_iounmap_noclk;
2413 }
2414
2415 /* Set accessors only after pdata->init() ! */
2416 fsl_set_accessors(pdata);
2417
2418 #ifndef CONFIG_ARCH_MXC
2419 if (pdata->have_sysif_regs)
2420 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2421 #endif
2422
2423 /* Initialize USB clocks */
2424 ret = fsl_udc_clk_init(pdev);
2425 if (ret < 0)
2426 goto err_iounmap_noclk;
2427
2428 /* Read Device Controller Capability Parameters register */
2429 dccparams = fsl_readl(&dr_regs->dccparams);
2430 if (!(dccparams & DCCPARAMS_DC)) {
2431 ERR("This SOC doesn't support device role\n");
2432 ret = -ENODEV;
2433 goto err_iounmap;
2434 }
2435 /* Get max device endpoints */
2436 /* DEN is bidirectional ep number, max_ep doubles the number */
2437 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2438
2439 udc_controller->irq = platform_get_irq(pdev, 0);
2440 if (!udc_controller->irq) {
2441 ret = -ENODEV;
2442 goto err_iounmap;
2443 }
2444
2445 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2446 driver_name, udc_controller);
2447 if (ret != 0) {
2448 ERR("cannot request irq %d err %d\n",
2449 udc_controller->irq, ret);
2450 goto err_iounmap;
2451 }
2452
2453 /* Initialize the udc structure including QH member and other member */
2454 if (struct_udc_setup(udc_controller, pdev)) {
2455 ERR("Can't initialize udc data structure\n");
2456 ret = -ENOMEM;
2457 goto err_free_irq;
2458 }
2459
2460 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2461 /* initialize usb hw reg except for regs for EP,
2462 * leave usbintr reg untouched */
2463 dr_controller_setup(udc_controller);
2464 }
2465
2466 ret = fsl_udc_clk_finalize(pdev);
2467 if (ret)
2468 goto err_free_irq;
2469
2470 /* Setup gadget structure */
2471 udc_controller->gadget.ops = &fsl_gadget_ops;
2472 udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2473 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2474 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2475 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2476 udc_controller->gadget.name = driver_name;
2477
2478 /* Setup gadget.dev and register with kernel */
2479 dev_set_name(&udc_controller->gadget.dev, "gadget");
2480 udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2481
2482 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2483 udc_controller->gadget.is_otg = 1;
2484
2485 /* setup QH and epctrl for ep0 */
2486 ep0_setup(udc_controller);
2487
2488 /* setup udc->eps[] for ep0 */
2489 struct_ep_setup(udc_controller, 0, "ep0", 0);
2490 /* for ep0: the desc defined here;
2491 * for other eps, gadget layer called ep_enable with defined desc
2492 */
2493 udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2494 usb_ep_set_maxpacket_limit(&udc_controller->eps[0].ep,
2495 USB_MAX_CTRL_PAYLOAD);
2496
2497 /* setup the udc->eps[] for non-control endpoints and link
2498 * to gadget.ep_list */
2499 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2500 char name[14];
2501
2502 sprintf(name, "ep%dout", i);
2503 struct_ep_setup(udc_controller, i * 2, name, 1);
2504 sprintf(name, "ep%din", i);
2505 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2506 }
2507
2508 /* use dma_pool for TD management */
2509 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2510 sizeof(struct ep_td_struct),
2511 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2512 if (udc_controller->td_pool == NULL) {
2513 ret = -ENOMEM;
2514 goto err_free_irq;
2515 }
2516
2517 ret = usb_add_gadget_udc_release(&pdev->dev, &udc_controller->gadget,
2518 fsl_udc_release);
2519 if (ret)
2520 goto err_del_udc;
2521
2522 create_proc_file();
2523 return 0;
2524
2525 err_del_udc:
2526 dma_pool_destroy(udc_controller->td_pool);
2527 err_free_irq:
2528 free_irq(udc_controller->irq, udc_controller);
2529 err_iounmap:
2530 if (pdata->exit)
2531 pdata->exit(pdev);
2532 fsl_udc_clk_release();
2533 err_iounmap_noclk:
2534 iounmap(dr_regs);
2535 err_release_mem_region:
2536 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2537 release_mem_region(res->start, resource_size(res));
2538 err_kfree:
2539 kfree(udc_controller);
2540 udc_controller = NULL;
2541 return ret;
2542 }
2543
2544 /* Driver removal function
2545 * Free resources and finish pending transactions
2546 */
fsl_udc_remove(struct platform_device * pdev)2547 static int fsl_udc_remove(struct platform_device *pdev)
2548 {
2549 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2550 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
2551
2552 DECLARE_COMPLETION_ONSTACK(done);
2553
2554 if (!udc_controller)
2555 return -ENODEV;
2556
2557 udc_controller->done = &done;
2558 usb_del_gadget_udc(&udc_controller->gadget);
2559
2560 fsl_udc_clk_release();
2561
2562 /* DR has been stopped in usb_gadget_unregister_driver() */
2563 remove_proc_file();
2564
2565 /* Free allocated memory */
2566 kfree(udc_controller->status_req->req.buf);
2567 kfree(udc_controller->status_req);
2568 kfree(udc_controller->eps);
2569
2570 dma_pool_destroy(udc_controller->td_pool);
2571 free_irq(udc_controller->irq, udc_controller);
2572 iounmap(dr_regs);
2573 if (res && (pdata->operating_mode == FSL_USB2_DR_DEVICE))
2574 release_mem_region(res->start, resource_size(res));
2575
2576 /* free udc --wait for the release() finished */
2577 wait_for_completion(&done);
2578
2579 /*
2580 * do platform specific un-initialization:
2581 * release iomux pins, etc.
2582 */
2583 if (pdata->exit)
2584 pdata->exit(pdev);
2585
2586 return 0;
2587 }
2588
2589 /*-----------------------------------------------------------------
2590 * Modify Power management attributes
2591 * Used by OTG statemachine to disable gadget temporarily
2592 -----------------------------------------------------------------*/
fsl_udc_suspend(struct platform_device * pdev,pm_message_t state)2593 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2594 {
2595 dr_controller_stop(udc_controller);
2596 return 0;
2597 }
2598
2599 /*-----------------------------------------------------------------
2600 * Invoked on USB resume. May be called in_interrupt.
2601 * Here we start the DR controller and enable the irq
2602 *-----------------------------------------------------------------*/
fsl_udc_resume(struct platform_device * pdev)2603 static int fsl_udc_resume(struct platform_device *pdev)
2604 {
2605 /* Enable DR irq reg and set controller Run */
2606 if (udc_controller->stopped) {
2607 dr_controller_setup(udc_controller);
2608 dr_controller_run(udc_controller);
2609 }
2610 udc_controller->usb_state = USB_STATE_ATTACHED;
2611 udc_controller->ep0_state = WAIT_FOR_SETUP;
2612 udc_controller->ep0_dir = 0;
2613 return 0;
2614 }
2615
fsl_udc_otg_suspend(struct device * dev,pm_message_t state)2616 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2617 {
2618 struct fsl_udc *udc = udc_controller;
2619 u32 mode, usbcmd;
2620
2621 mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2622
2623 pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2624
2625 /*
2626 * If the controller is already stopped, then this must be a
2627 * PM suspend. Remember this fact, so that we will leave the
2628 * controller stopped at PM resume time.
2629 */
2630 if (udc->stopped) {
2631 pr_debug("gadget already stopped, leaving early\n");
2632 udc->already_stopped = 1;
2633 return 0;
2634 }
2635
2636 if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2637 pr_debug("gadget not in device mode, leaving early\n");
2638 return 0;
2639 }
2640
2641 /* stop the controller */
2642 usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2643 fsl_writel(usbcmd, &dr_regs->usbcmd);
2644
2645 udc->stopped = 1;
2646
2647 pr_info("USB Gadget suspended\n");
2648
2649 return 0;
2650 }
2651
fsl_udc_otg_resume(struct device * dev)2652 static int fsl_udc_otg_resume(struct device *dev)
2653 {
2654 pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
2655 udc_controller->stopped, udc_controller->already_stopped);
2656
2657 /*
2658 * If the controller was stopped at suspend time, then
2659 * don't resume it now.
2660 */
2661 if (udc_controller->already_stopped) {
2662 udc_controller->already_stopped = 0;
2663 pr_debug("gadget was already stopped, leaving early\n");
2664 return 0;
2665 }
2666
2667 pr_info("USB Gadget resume\n");
2668
2669 return fsl_udc_resume(NULL);
2670 }
2671 /*-------------------------------------------------------------------------
2672 Register entry point for the peripheral controller driver
2673 --------------------------------------------------------------------------*/
2674 static const struct platform_device_id fsl_udc_devtype[] = {
2675 {
2676 .name = "imx-udc-mx27",
2677 }, {
2678 .name = "imx-udc-mx51",
2679 }, {
2680 /* sentinel */
2681 }
2682 };
2683 MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
2684 static struct platform_driver udc_driver = {
2685 .remove = fsl_udc_remove,
2686 /* Just for FSL i.mx SoC currently */
2687 .id_table = fsl_udc_devtype,
2688 /* these suspend and resume are not usb suspend and resume */
2689 .suspend = fsl_udc_suspend,
2690 .resume = fsl_udc_resume,
2691 .driver = {
2692 .name = driver_name,
2693 /* udc suspend/resume called from OTG driver */
2694 .suspend = fsl_udc_otg_suspend,
2695 .resume = fsl_udc_otg_resume,
2696 },
2697 };
2698
2699 module_platform_driver_probe(udc_driver, fsl_udc_probe);
2700
2701 MODULE_DESCRIPTION(DRIVER_DESC);
2702 MODULE_AUTHOR(DRIVER_AUTHOR);
2703 MODULE_LICENSE("GPL");
2704 MODULE_ALIAS("platform:fsl-usb2-udc");
2705