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[deliverable/linux.git] / drivers / usb / gadget / udc / fsl_udc_core.c
CommitLineData
b504882d 1/*
58c559e6 2 * Copyright (C) 2004-2007,2011-2012 Freescale Semiconductor, Inc.
ea437f39 3 * All rights reserved.
b504882d
LY		 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.
2ea6698d 10 * This can be found on MPC8349E/MPC8313E/MPC5121E cpus.
b504882d
LY		 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>
ded017ee 27#include <linux/err.h>
b504882d
LY		 28#include <linux/slab.h>
29#include <linux/init.h>
b504882d
LY		 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>
9454a57a 37#include <linux/usb/gadget.h>
b504882d
LY		 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>
54e4026b 43#include <linux/delay.h>
f0ea8834 44#include <linux/of_device.h>
b504882d
LY		 45
46#include <asm/byteorder.h>
47#include <asm/io.h>
b504882d
LY		 48#include <asm/unaligned.h>
49#include <asm/dma.h>
b504882d
LY		 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
59static const char driver_name[] = "fsl-usb2-udc";
60static const char driver_desc[] = DRIVER_DESC;
61
bbb9f94c 62static struct usb_dr_device __iomem *dr_regs;
58c559e6 63
bbb9f94c 64static struct usb_sys_interface __iomem *usb_sys_regs;
b504882d
LY		 65
66/* it is initialized in probe() */
67static struct fsl_udc *udc_controller = NULL;
68
69static const struct usb_endpoint_descriptor
70fsl_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
b504882d
LY		 78static void fsl_ep_fifo_flush(struct usb_ep *_ep);
79
80#ifdef CONFIG_PPC32
09ba0def
AG		 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 */
94static u32 _fsl_readl_be(const unsigned __iomem *p)
95{
96 return in_be32(p);
97}
98
99static u32 _fsl_readl_le(const unsigned __iomem *p)
100{
101 return in_le32(p);
102}
103
104static void _fsl_writel_be(u32 v, unsigned __iomem *p)
105{
106 out_be32(p, v);
107}
108
109static void _fsl_writel_le(u32 v, unsigned __iomem *p)
110{
111 out_le32(p, v);
112}
113
114static u32 (*_fsl_readl)(const unsigned __iomem *p);
115static 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
3140d5b2
AG		 120static 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
09ba0def
AG		 131static 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
138static 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 */
3140d5b2
AG		 145static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
146
b504882d 147#define fsl_readl(addr) readl(addr)
c93eebbe 148#define fsl_writel(val32, addr) writel(val32, addr)
09ba0def
AG		 149#define cpu_to_hc32(x) cpu_to_le32(x)
150#define hc32_to_cpu(x) le32_to_cpu(x)
151#endif /* CONFIG_PPC32 */
b504882d
LY		 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 *--------------------------------------------------------------*/
161static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
bbb9f94c
FB		 162__releases(ep->udc->lock)
163__acquires(ep->udc->lock)
b504882d
LY		 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
5f6da778 190 usb_gadget_unmap_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
b504882d
LY		 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);
304f7e5e
MS		 200
201 usb_gadget_giveback_request(&ep->ep, &req->req);
b504882d
LY		 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 *--------------------------------------------------------------*/
211static 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
231static int dr_controller_setup(struct fsl_udc *udc)
232{
ea437f39
RM		 233 unsigned int tmp, portctrl, ep_num;
234 unsigned int max_no_of_ep;
54e4026b 235 unsigned int ctrl;
b504882d 236 unsigned long timeout;
58c559e6 237
b504882d
LY		 238#define FSL_UDC_RESET_TIMEOUT 1000
239
54e4026b
GL		 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:
58c559e6
RM		 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 }
54e4026b
GL		 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:
58c559e6
RM		 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 }
54e4026b
GL		 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
b504882d
LY		 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)) {
bf7409a2 294 ERR("udc reset timeout!\n");
b504882d
LY		 295 return -ETIMEDOUT;
296 }
297 cpu_relax();
298 }
299
300 /* Set the controller as device mode */
301 tmp = fsl_readl(&dr_regs->usbmode);
2ea6698d 302 tmp &= ~USB_MODE_CTRL_MODE_MASK; /* clear mode bits */
b504882d
LY		 303 tmp |= USB_MODE_CTRL_MODE_DEVICE;
304 /* Disable Setup Lockout */
305 tmp |= USB_MODE_SETUP_LOCK_OFF;
2ea6698d
AG		 306 if (udc->pdata->es)
307 tmp |= USB_MODE_ES;
b504882d
LY		 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",
6ef65a7f 318 udc->ep_qh, (int)tmp,
b504882d
LY		 319 fsl_readl(&dr_regs->endpointlistaddr));
320
ea437f39
RM		 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 }
b504882d 329 /* Config control enable i/o output, cpu endian register */
54e4026b 330#ifndef CONFIG_ARCH_MXC
2ea6698d
AG		 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 }
54e4026b 336#endif
b504882d
LY		 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
2ea6698d
AG		 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 }
b504882d
LY		 349#endif
350
351 return 0;
352}
353
354/* Enable DR irq and set controller to run state */
355static 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);
b504882d
LY		 378}
379
380static void dr_controller_stop(struct fsl_udc *udc)
381{
382 unsigned int tmp;
383
83722bc9
AG		 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
b504882d
LY		 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);
b504882d
LY		 410}
411
9c94155e
WN		 412static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
413 unsigned char ep_type)
b504882d
LY		 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;
ea437f39 422 tmp_epctrl &= ~EPCTRL_TX_TYPE;
b504882d
LY		 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;
ea437f39 429 tmp_epctrl &= ~EPCTRL_RX_TYPE;
b504882d
LY		 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
437static void
438dr_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 */
465static 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 ------------------------------------------------------------------*/
485static 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;
9a6e184c 514
09ba0def 515 p_QH->max_pkt_length = cpu_to_hc32(tmp);
9a6e184c
LY		 516 p_QH->next_dtd_ptr = 1;
517 p_QH->size_ioc_int_sts = 0;
b504882d
LY		 518}
519
520/* Setup qh structure and ep register for ep0. */
521static 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-------------------------------------------------------------------------*/
546static 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 */
1fa75972 559 if (!_ep || !desc
b504882d
LY		 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
29cc8897 568 max = usb_endpoint_maxp(desc);
b504882d 569
25985edc 570 /* Disable automatic zlp generation. Driver is responsible to indicate
b504882d
LY		 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));
88e3b59b 589 max = max & 0x7ff; /* bit 0~10 */
b504882d
LY		 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;
79149b8b 600 ep->ep.desc = desc;
b504882d
LY		 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,
79149b8b 624 ep->ep.desc->bEndpointAddress & 0x0f,
b504882d
LY		 625 (desc->bEndpointAddress & USB_DIR_IN)
626 ? "in" : "out", max);
627en_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*---------------------------------------------------------------------*/
635static 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);
79149b8b 644 if (!_ep || !ep->ep.desc) {
b504882d
LY		 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]);
ea437f39
RM		 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 }
b504882d
LY		 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
f9c56cdd 667 ep->ep.desc = NULL;
b504882d
LY		 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*---------------------------------------------------------------------*/
680static struct usb_request *
681fsl_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
695static 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
6414e94c
LY		 705/* Actually add a dTD chain to an empty dQH and let go */
706static 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 */
224b5039 727static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
b504882d 728{
b504882d 729 u32 temp, bitmask, tmp_stat;
b504882d
LY		 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 */
f79a60b8 739 if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
b504882d
LY		 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 =
09ba0def 744 cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
4d0947de
PC		 745 /* Ensure dTD's next dtd pointer to be updated */
746 wmb();
b504882d
LY		 747 /* Read prime bit, if 1 goto done */
748 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
6414e94c 749 return;
b504882d
LY		 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)
6414e94c 766 return;
b504882d
LY		 767 }
768
6414e94c 769 fsl_prime_ep(ep, req->head);
b504882d
LY		 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 */
778static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
c5cc5ed8 779 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
b504882d
LY		 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
c5cc5ed8 788 dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
b504882d
LY		 789 if (dtd == NULL)
790 return dtd;
791
792 dtd->td_dma = *dma;
793 /* Clear reserved field */
09ba0def 794 swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
b504882d 795 swap_temp &= ~DTD_RESERVED_FIELDS;
09ba0def 796 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
b504882d
LY		 797
798 /* Init all of buffer page pointers */
799 swap_temp = (u32) (req->req.dma + req->req.actual);
09ba0def
AG		 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);
b504882d
LY		 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)
bf7409a2 820 VDBG("multi-dtd request!");
b504882d
LY		 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
09ba0def 828 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
b504882d
LY		 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 */
c5cc5ed8 838static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
b504882d
LY		 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 {
c5cc5ed8 847 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
b504882d
LY		 848 if (dtd == NULL)
849 return -ENOMEM;
850
851 if (is_first) {
852 is_first = 0;
853 req->head = dtd;
854 } else {
09ba0def 855 last_dtd->next_td_ptr = cpu_to_hc32(dma);
b504882d
LY		 856 last_dtd->next_td_virt = dtd;
857 }
858 last_dtd = dtd;
859
860 req->dtd_count++;
861 } while (!is_last);
862
09ba0def 863 dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
b504882d
LY		 864
865 req->tail = dtd;
866
867 return 0;
868}
869
870/* queues (submits) an I/O request to an endpoint */
871static int
872fsl_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;
5f6da778 878 int ret;
b504882d
LY		 879
880 /* catch various bogus parameters */
881 if (!_req || !req->req.complete || !req->req.buf
882 || !list_empty(&req->queue)) {
bf7409a2 883 VDBG("%s, bad params", __func__);
b504882d
LY		 884 return -EINVAL;
885 }
79149b8b 886 if (unlikely(!_ep || !ep->ep.desc)) {
bf7409a2 887 VDBG("%s, bad ep", __func__);
b504882d
LY		 888 return -EINVAL;
889 }
79149b8b 890 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
b504882d
LY		 891 if (req->req.length > ep->ep.maxpacket)
892 return -EMSGSIZE;
b504882d
LY		 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
5f6da778
FB		 901 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
902 if (ret)
903 return ret;
b504882d
LY		 904
905 req->req.status = -EINPROGRESS;
906 req->req.actual = 0;
907 req->dtd_count = 0;
908
b504882d 909 /* build dtds and push them to device queue */
c5cc5ed8
PC		 910 if (!fsl_req_to_dtd(req, gfp_flags)) {
911 spin_lock_irqsave(&udc->lock, flags);
b504882d
LY		 912 fsl_queue_td(ep, req);
913 } else {
b504882d
LY		 914 return -ENOMEM;
915 }
916
b504882d
LY		 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 */
926static 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) {
b504882d
LY		 967 struct fsl_req *next_req;
968
b504882d
LY		 969 next_req = list_entry(req->queue.next, struct fsl_req,
970 queue);
971
6414e94c
LY		 972 /* prime with dTD of next request */
973 fsl_prime_ep(ep, next_req->head);
b504882d 974 }
6414e94c 975 /* The request hasn't been processed, patch up the TD chain */
b504882d
LY		 976 } else {
977 struct fsl_req *prev_req;
978
979 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
6414e94c 980 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
b504882d
LY		 981 }
982
983 done(ep, req, -ECONNRESET);
984
985 /* Enable EP */
986out: 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*----------------------------------------------------------------*/
1006static 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;
79149b8b 1016 if (!_ep || !ep->ep.desc) {
b504882d
LY		 1017 status = -EINVAL;
1018 goto out;
1019 }
1020
79149b8b 1021 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
b504882d
LY		 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 }
1044out:
1045 VDBG(" %s %s halt stat %d", ep->ep.name,
1046 value ? "set" : "clear", status);
1047
1048 return status;
1049}
1050
2ea6698d
AG		 1051static 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;
6414e94c 1057 struct ep_queue_head *qh;
2ea6698d
AG		 1058
1059 ep = container_of(_ep, struct fsl_ep, ep);
79149b8b 1060 if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
2ea6698d
AG		 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
6414e94c 1068 qh = get_qh_by_ep(ep);
2ea6698d
AG		 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)
6414e94c 1074 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
2ea6698d
AG		 1075 >> DTD_LENGTH_BIT_POS;
1076
1077 pr_debug("%s %u\n", __func__, size);
1078 return size;
1079}
1080
b504882d
LY		 1081static 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);
79149b8b 1093 if (!ep->ep.desc)
b504882d
LY		 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
1122static 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
b504882d
LY		 1129 .queue = fsl_ep_queue,
1130 .dequeue = fsl_ep_dequeue,
1131
1132 .set_halt = fsl_ep_set_halt,
2ea6698d 1133 .fifo_status = fsl_ep_fifo_status,
b504882d
LY		 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 *----------------------------------------------------------------------*/
1144static 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 -----------------------------------------------------------------------*/
1152static 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
1171static 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 */
1178static 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);
bf7409a2 1185 VDBG("VBUS %s", is_active ? "on" : "off");
b504882d
LY		 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 */
1204static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1205{
b504882d
LY		 1206 struct fsl_udc *udc;
1207
1208 udc = container_of(gadget, struct fsl_udc, gadget);
ded017ee 1209 if (!IS_ERR_OR_NULL(udc->transceiver))
b96d3b08 1210 return usb_phy_set_power(udc->transceiver, mA);
b504882d
LY		 1211 return -ENOTSUPP;
1212}
1213
1214/* Change Data+ pullup status
1215 * this func is used by usb_gadget_connect/disconnet
1216 */
1217static 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);
252455c4
SG		 1222
1223 if (!udc->vbus_active)
1224 return -EOPNOTSUPP;
1225
b504882d
LY		 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
eb65796e
FB		 1237static int fsl_udc_start(struct usb_gadget *g,
1238 struct usb_gadget_driver *driver);
22835b80
FB		 1239static int fsl_udc_stop(struct usb_gadget *g);
1240
eeef4587 1241static const struct usb_gadget_ops fsl_gadget_ops = {
b504882d
LY		 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,
eb65796e
FB		 1248 .udc_start = fsl_udc_start,
1249 .udc_stop = fsl_udc_stop,
b504882d
LY		 1250};
1251
1252/* Set protocol stall on ep0, protocol stall will automatically be cleared
1253 on new transaction */
1254static 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 */
1267static int ep0_prime_status(struct fsl_udc *udc, int direction)
1268{
1269 struct fsl_req *req = udc->status_req;
1270 struct fsl_ep *ep;
5f6da778 1271 int ret;
b504882d
LY		 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];
f79a60b8
PC		 1279 if (udc->ep0_state != DATA_STATE_XMIT)
1280 udc->ep0_state = WAIT_FOR_OUT_STATUS;
b504882d
LY		 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
5f6da778
FB		 1289 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1290 if (ret)
1291 return ret;
3140d5b2 1292
c5cc5ed8 1293 if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
224b5039 1294 fsl_queue_td(ep, req);
b504882d
LY		 1295 else
1296 return -ENOMEM;
1297
b504882d
LY		 1298 list_add_tail(&req->queue, &ep->queue);
1299
224b5039 1300 return 0;
b504882d
LY		 1301}
1302
825bee3a 1303static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
b504882d
LY		 1304{
1305 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1306
825bee3a
WN		 1307 if (ep->name)
1308 nuke(ep, -ESHUTDOWN);
b504882d
LY		 1309}
1310
1311/*
1312 * ch9 Set address
1313 */
1314static 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 */
1328static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1329 u16 index, u16 length)
1330{
1331 u16 tmp = 0; /* Status, cpu endian */
b504882d
LY		 1332 struct fsl_req *req;
1333 struct fsl_ep *ep;
5f6da778 1334 int ret;
b504882d
LY		 1335
1336 ep = &udc->eps[0];
1337
1338 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1339 /* Get device status */
4651fcf3 1340 tmp = udc->gadget.is_selfpowered;
b504882d
LY		 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 */
79149b8b 1353 if (!target_ep->ep.desc)
b504882d
LY		 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);
2ea6698d 1364
b504882d
LY		 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
5f6da778
FB		 1372 ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1373 if (ret)
1374 goto stall;
3140d5b2 1375
b504882d 1376 /* prime the data phase */
c5cc5ed8 1377 if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
224b5039 1378 fsl_queue_td(ep, req);
b504882d
LY		 1379 else /* no mem */
1380 goto stall;
1381
b504882d
LY		 1382 list_add_tail(&req->queue, &ep->queue);
1383 udc->ep0_state = DATA_STATE_XMIT;
f79a60b8
PC		 1384 if (ep0_prime_status(udc, EP_DIR_OUT))
1385 ep0stall(udc);
1386
b504882d
LY		 1387 return;
1388stall:
1389 ep0stall(udc);
1390}
1391
1392static void setup_received_irq(struct fsl_udc *udc,
1393 struct usb_ctrlrequest *setup)
bbb9f94c
FB		 1394__releases(udc->lock)
1395__acquires(udc->lock)
b504882d
LY		 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
39d1f8c9 1403 /* We process some stardard setup requests here */
b504882d 1404 switch (setup->bRequest) {
b504882d 1405 case USB_REQ_GET_STATUS:
39d1f8c9
LY		 1406 /* Data+Status phase from udc */
1407 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
b504882d
LY		 1408 != (USB_DIR_IN | USB_TYPE_STANDARD))
1409 break;
1410 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
39d1f8c9 1411 return;
b504882d 1412
b504882d 1413 case USB_REQ_SET_ADDRESS:
39d1f8c9 1414 /* Status phase from udc */
b504882d
LY		 1415 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1416 | USB_RECIP_DEVICE))
1417 break;
1418 ch9setaddress(udc, wValue, wIndex, wLength);
39d1f8c9 1419 return;
b504882d 1420
b504882d
LY		 1421 case USB_REQ_CLEAR_FEATURE:
1422 case USB_REQ_SET_FEATURE:
39d1f8c9
LY		 1423 /* Status phase from udc */
1424 {
b504882d 1425 int rc = -EOPNOTSUPP;
2ea6698d 1426 u16 ptc = 0;
b504882d 1427
39d1f8c9
LY		 1428 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1429 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
b504882d
LY		 1430 int pipe = get_pipe_by_windex(wIndex);
1431 struct fsl_ep *ep;
1432
118d63f7 1433 if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
b504882d
LY		 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
39d1f8c9
LY		 1443 } else if ((setup->bRequestType & (USB_RECIP_MASK
1444 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1445 | USB_TYPE_STANDARD)) {
b504882d
LY		 1446 /* Note: The driver has not include OTG support yet.
1447 * This will be set when OTG support is added */
2ea6698d
AG		 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 }
b504882d 1461 rc = 0;
39d1f8c9
LY		 1462 } else
1463 break;
1464
b504882d
LY		 1465 if (rc == 0) {
1466 if (ep0_prime_status(udc, EP_DIR_IN))
1467 ep0stall(udc);
1468 }
2ea6698d
AG		 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
39d1f8c9 1478 return;
b504882d 1479 }
b504882d 1480
39d1f8c9 1481 default:
b504882d
LY		 1482 break;
1483 }
39d1f8c9
LY		 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;
f79a60b8
PC		 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
39d1f8c9
LY		 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 }
b504882d
LY		 1515}
1516
1517/* Process request for Data or Status phase of ep0
1518 * prime status phase if needed */
1519static 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:
f79a60b8
PC		 1533 /* already primed at setup_received_irq */
1534 udc->ep0_state = WAIT_FOR_OUT_STATUS;
b504882d
LY		 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:
bf7409a2 1545 ERR("Unexpect ep0 packets\n");
b504882d
LY		 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 */
1555static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1556{
1557 u32 temp;
1558 struct ep_queue_head *qh;
09ba0def 1559 struct fsl_usb2_platform_data *pdata = udc->pdata;
b504882d
LY		 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 */
09ba0def
AG		 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 }
b504882d
LY		 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 */
1592static 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++) {
09ba0def 1607 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
b504882d
LY		 1608 & DTD_PACKET_SIZE)
1609 >> DTD_LENGTH_BIT_POS;
1610 actual -= remaining_length;
1611
09ba0def
AG		 1612 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1613 if (errors & DTD_ERROR_MASK) {
b504882d
LY		 1614 if (errors & DTD_STATUS_HALTED) {
1615 ERR("dTD error %08x QH=%d\n", errors, pipe);
1616 /* Clear the errors and Halt condition */
09ba0def 1617 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
b504882d 1618 tmp &= ~errors;
09ba0def 1619 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
b504882d
LY		 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
25985edc 1634 ERR("Unknown error has occurred (0x%x)!\n",
b504882d
LY		 1635 errors);
1636
09ba0def 1637 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
b504882d
LY		 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++;
bf7409a2 1653 VDBG("dTD transmitted successful");
b504882d
LY		 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 */
1669static 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
118d63f7 1683 for (i = 0; i < udc->max_ep; i++) {
b504882d
LY		 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) {
b6c63937 1696 WARNING("Invalid EP?");
b504882d
LY		 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
e538dfda
MN		 1721static inline enum usb_device_speed portscx_device_speed(u32 reg)
1722{
0e042be3 1723 switch (reg & PORTSCX_PORT_SPEED_MASK) {
e538dfda
MN		 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
b504882d
LY		 1735/* Process a port change interrupt */
1736static void port_change_irq(struct fsl_udc *udc)
1737{
83722bc9
AG		 1738 if (udc->bus_reset)
1739 udc->bus_reset = 0;
1740
b504882d 1741 /* Bus resetting is finished */
e538dfda 1742 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
b504882d 1743 /* Get the speed */
e538dfda
MN		 1744 udc->gadget.speed =
1745 portscx_device_speed(fsl_readl(&dr_regs->portsc1));
b504882d
LY		 1746
1747 /* Update USB state */
1748 if (!udc->resume_state)
1749 udc->usb_state = USB_STATE_DEFAULT;
1750}
1751
1752/* Process suspend interrupt */
1753static 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
1763static 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 */
363ea206 1774static int reset_queues(struct fsl_udc *udc, bool bus_reset)
b504882d
LY		 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 */
185e3dea 1782 spin_unlock(&udc->lock);
363ea206
PC		 1783 if (bus_reset)
1784 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1785 else
1786 udc->driver->disconnect(&udc->gadget);
185e3dea 1787 spin_lock(&udc->lock);
b504882d
LY		 1788
1789 return 0;
1790}
1791
1792/* Process reset interrupt */
1793static 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");
83722bc9
AG		 1836 /* Bus is reseting */
1837 udc->bus_reset = 1;
b504882d
LY		 1838 /* Reset all the queues, include XD, dTD, EP queue
1839 * head and TR Queue */
363ea206 1840 reset_queues(udc, true);
b504882d
LY		 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 */
363ea206 1849 reset_queues(udc, false);
b504882d
LY		 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 */
1862static 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) {
83722bc9 1915 VDBG("reset int");
b504882d
LY		 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)) {
bf7409a2 1927 VDBG("Error IRQ %x", irq_src);
b504882d
LY		 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*----------------------------------------------------------------*/
eb65796e
FB		 1938static int fsl_udc_start(struct usb_gadget *g,
1939 struct usb_gadget_driver *driver)
b504882d 1940{
eb65796e 1941 int retval = 0;
b504882d
LY		 1942 unsigned long flags = 0;
1943
b504882d
LY		 1944 /* lock is needed but whether should use this lock or another */
1945 spin_lock_irqsave(&udc_controller->lock, flags);
1946
7483cff8 1947 driver->driver.bus = NULL;
b504882d
LY		 1948 /* hook up the driver */
1949 udc_controller->driver = driver;
b504882d 1950 spin_unlock_irqrestore(&udc_controller->lock, flags);
4651fcf3 1951 g->is_selfpowered = 1;
b504882d 1952
ded017ee 1953 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
83722bc9
AG		 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 */
ded017ee 1959 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
6e13c650
HK		 1960 retval = otg_set_peripheral(
1961 udc_controller->transceiver->otg,
83722bc9
AG		 1962 &udc_controller->gadget);
1963 if (retval < 0) {
1964 ERR("can't bind to transceiver\n");
bbb9f94c 1965 udc_controller->driver = NULL;
83722bc9
AG		 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 }
b504882d 1976
b504882d
LY		 1977 return retval;
1978}
b504882d
LY		 1979
1980/* Disconnect from gadget driver */
22835b80 1981static int fsl_udc_stop(struct usb_gadget *g)
b504882d
LY		 1982{
1983 struct fsl_ep *loop_ep;
1984 unsigned long flags;
1985
ded017ee 1986 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
6e13c650 1987 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
b504882d
LY		 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
7483cff8 2006 udc_controller->driver = NULL;
b504882d 2007
b504882d
LY		 2008 return 0;
2009}
b504882d
LY		 2010
2011/*-------------------------------------------------------------------------
2012 PROC File System Support
2013-------------------------------------------------------------------------*/
2014#ifdef CONFIG_USB_GADGET_DEBUG_FILES
2015
2016#include <linux/seq_file.h>
2017
2018static const char proc_filename[] = "driver/fsl_usb2_udc";
2019
77cd02c1 2020static int fsl_proc_read(struct seq_file *m, void *v)
b504882d 2021{
b504882d 2022 unsigned long flags;
77cd02c1 2023 int i;
b504882d
LY		 2024 u32 tmp_reg;
2025 struct fsl_ep *ep = NULL;
2026 struct fsl_req *req;
2027
2028 struct fsl_udc *udc = udc_controller;
b504882d
LY		 2029
2030 spin_lock_irqsave(&udc->lock, flags);
2031
dc0d5c1e 2032 /* ------basic driver information ---- */
77cd02c1 2033 seq_printf(m,
b504882d
LY		 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)");
b504882d
LY		 2039
2040 /* ------ DR Registers ----- */
2041 tmp_reg = fsl_readl(&dr_regs->usbcmd);
77cd02c1 2042 seq_printf(m,
b504882d
LY		 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");
b504882d
LY		 2048
2049 tmp_reg = fsl_readl(&dr_regs->usbsts);
77cd02c1 2050 seq_printf(m,
b504882d 2051 "USB Status Reg:\n"
9d9d88c8 2052 "Dr Suspend: %d Reset Received: %d System Error: %s "
b504882d
LY		 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");
b504882d
LY		 2058
2059 tmp_reg = fsl_readl(&dr_regs->usbintr);
77cd02c1 2060 seq_printf(m,
984e833c 2061 "USB Interrupt Enable Reg:\n"
9d9d88c8 2062 "Sleep Enable: %d SOF Received Enable: %d "
b504882d 2063 "Reset Enable: %d\n"
9d9d88c8 2064 "System Error Enable: %d "
b504882d 2065 "Port Change Dectected Enable: %d\n"
9d9d88c8 2066 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
b504882d
LY		 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);
b504882d
LY		 2074
2075 tmp_reg = fsl_readl(&dr_regs->frindex);
77cd02c1 2076 seq_printf(m,
9d9d88c8 2077 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
b504882d 2078 (tmp_reg & USB_FRINDEX_MASKS));
b504882d
LY		 2079
2080 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
77cd02c1 2081 seq_printf(m,
9d9d88c8 2082 "USB Device Address Reg: Device Addr is 0x%x\n\n",
b504882d 2083 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
b504882d
LY		 2084
2085 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
77cd02c1 2086 seq_printf(m,
9d9d88c8 2087 "USB Endpoint List Address Reg: "
b504882d
LY		 2088 "Device Addr is 0x%x\n\n",
2089 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
b504882d
LY		 2090
2091 tmp_reg = fsl_readl(&dr_regs->portsc1);
77cd02c1 2092 seq_printf(m,
b504882d 2093 "USB Port Status&Control Reg:\n"
9d9d88c8
WN		 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 "
b504882d 2098 "Port Enable/Disable Change: %s\n"
9d9d88c8 2099 "Port Enabled/Disabled: %s "
b504882d 2100 "Current Connect Status: %s\n\n", ( {
77cd02c1 2101 const char *s;
b504882d
LY		 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 }
e538dfda
MN		 2112 s;} ),
2113 usb_speed_string(portscx_device_speed(tmp_reg)),
b504882d
LY		 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");
b504882d
LY		 2127
2128 tmp_reg = fsl_readl(&dr_regs->usbmode);
77cd02c1 2129 seq_printf(m,
9d9d88c8 2130 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
77cd02c1 2131 const char *s;
b504882d
LY		 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 } ));
b504882d
LY		 2144
2145 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
77cd02c1 2146 seq_printf(m,
9d9d88c8 2147 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
b504882d 2148 (tmp_reg & EP_SETUP_STATUS_MASK));
b504882d
LY		 2149
2150 for (i = 0; i < udc->max_ep / 2; i++) {
2151 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
77cd02c1 2152 seq_printf(m, "EP Ctrl Reg [0x%x]: = [0x%x]\n", i, tmp_reg);
b504882d
LY		 2153 }
2154 tmp_reg = fsl_readl(&dr_regs->endpointprime);
77cd02c1 2155 seq_printf(m, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
b504882d 2156
54e4026b 2157#ifndef CONFIG_ARCH_MXC
2ea6698d
AG		 2158 if (udc->pdata->have_sysif_regs) {
2159 tmp_reg = usb_sys_regs->snoop1;
77cd02c1 2160 seq_printf(m, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
b504882d 2161
2ea6698d 2162 tmp_reg = usb_sys_regs->control;
77cd02c1 2163 seq_printf(m, "General Control Reg : = [0x%x]\n\n", tmp_reg);
2ea6698d 2164 }
54e4026b 2165#endif
b504882d
LY		 2166
2167 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2168 ep = &udc->eps[0];
77cd02c1 2169 seq_printf(m, "For %s Maxpkt is 0x%x index is 0x%x\n",
b504882d 2170 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
b504882d
LY		 2171
2172 if (list_empty(&ep->queue)) {
77cd02c1 2173 seq_puts(m, "its req queue is empty\n\n");
b504882d
LY		 2174 } else {
2175 list_for_each_entry(req, &ep->queue, queue) {
77cd02c1 2176 seq_printf(m,
9d9d88c8 2177 "req %p actual 0x%x length 0x%x buf %p\n",
b504882d
LY		 2178 &req->req, req->req.actual,
2179 req->req.length, req->req.buf);
b504882d
LY		 2180 }
2181 }
2182 /* other gadget->eplist ep */
2183 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
79149b8b 2184 if (ep->ep.desc) {
77cd02c1 2185 seq_printf(m,
b504882d
LY		 2186 "\nFor %s Maxpkt is 0x%x "
2187 "index is 0x%x\n",
2188 ep->ep.name, ep_maxpacket(ep),
2189 ep_index(ep));
b504882d
LY		 2190
2191 if (list_empty(&ep->queue)) {
77cd02c1 2192 seq_puts(m, "its req queue is empty\n\n");
b504882d
LY		 2193 } else {
2194 list_for_each_entry(req, &ep->queue, queue) {
77cd02c1 2195 seq_printf(m,
9d9d88c8 2196 "req %p actual 0x%x length "
b504882d
LY		 2197 "0x%x buf %p\n",
2198 &req->req, req->req.actual,
2199 req->req.length, req->req.buf);
77cd02c1
DH		 2200 } /* end for each_entry of ep req */
2201 } /* end for else */
2202 } /* end for if(ep->queue) */
2203 } /* end (ep->desc) */
b504882d
LY		 2204
2205 spin_unlock_irqrestore(&udc->lock, flags);
77cd02c1
DH		 2206 return 0;
2207}
b504882d 2208
77cd02c1
DH		 2209/*
2210 * seq_file wrappers for procfile show routines.
2211 */
2212static int fsl_proc_open(struct inode *inode, struct file *file)
2213{
2214 return single_open(file, fsl_proc_read, NULL);
b504882d
LY		 2215}
2216
77cd02c1
DH		 2217static const struct file_operations fsl_proc_fops = {
2218 .open = fsl_proc_open,
2219 .read = seq_read,
2220 .llseek = seq_lseek,
962a1ab2 2221 .release = single_release,
77cd02c1 2222};
b504882d 2223
77cd02c1 2224#define create_proc_file() proc_create(proc_filename, 0, NULL, &fsl_proc_fops)
b504882d
LY		 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 */
2237static void fsl_udc_release(struct device *dev)
2238{
2239 complete(udc_controller->done);
37c4fd8c 2240 dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
b504882d
LY		 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 ------------------------------------------------------------------*/
da150573 2252static int struct_udc_setup(struct fsl_udc *udc,
4365831d 2253 struct platform_device *pdev)
b504882d 2254{
b504882d
LY		 2255 struct fsl_usb2_platform_data *pdata;
2256 size_t size;
2257
e01ee9f5 2258 pdata = dev_get_platdata(&pdev->dev);
b504882d 2259 udc->phy_mode = pdata->phy_mode;
b504882d
LY		 2260
2261 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
8a67ab7d 2262 if (!udc->eps)
4365831d 2263 return -1;
b504882d
LY		 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);
4365831d 2278 return -1;
b504882d
LY		 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);
b504882d
LY		 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 */
b504882d 2294
4365831d 2295 return 0;
b504882d
LY		 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 *--------------------------------------------------------------*/
da150573 2304static int struct_ep_setup(struct fsl_udc *udc, unsigned char index,
b504882d
LY		 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
60a28c63
RB		 2316 if (index == 0) {
2317 ep->ep.caps.type_control = true;
2318 } else {
2319 ep->ep.caps.type_iso = true;
2320 ep->ep.caps.type_bulk = true;
2321 ep->ep.caps.type_int = true;
2322 }
2323
2324 if (index & 1)
2325 ep->ep.caps.dir_in = true;
2326 else
2327 ep->ep.caps.dir_out = true;
2328
b504882d
LY		 2329 /* for ep0: maxP defined in desc
2330 * for other eps, maxP is set by epautoconfig() called by gadget layer
2331 */
e117e742 2332 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
b504882d
LY		 2333
2334 /* the queue lists any req for this ep */
2335 INIT_LIST_HEAD(&ep->queue);
2336
2337 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2338 if (link)
2339 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2340 ep->gadget = &udc->gadget;
2341 ep->qh = &udc->ep_qh[index];
2342
2343 return 0;
2344}
2345
2346/* Driver probe function
4365831d
LY		 2347 * all intialization operations implemented here except enabling usb_intr reg
2348 * board setup should have been done in the platform code
b504882d 2349 */
da150573 2350static int fsl_udc_probe(struct platform_device *pdev)
b504882d 2351{
09ba0def 2352 struct fsl_usb2_platform_data *pdata;
b504882d
LY		 2353 struct resource *res;
2354 int ret = -ENODEV;
2355 unsigned int i;
4365831d 2356 u32 dccparams;
b504882d 2357
4365831d 2358 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
8a67ab7d 2359 if (udc_controller == NULL)
b504882d 2360 return -ENOMEM;
b504882d 2361
e01ee9f5 2362 pdata = dev_get_platdata(&pdev->dev);
09ba0def 2363 udc_controller->pdata = pdata;
e06da9a8
WN		 2364 spin_lock_init(&udc_controller->lock);
2365 udc_controller->stopped = 1;
2366
83722bc9
AG		 2367#ifdef CONFIG_USB_OTG
2368 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
662dca54 2369 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee 2370 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
83722bc9
AG		 2371 ERR("Can't find OTG driver!\n");
2372 ret = -ENODEV;
2373 goto err_kfree;
2374 }
2375 }
2376#endif
2377
b504882d 2378 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
4365831d 2379 if (!res) {
23d7cd04
WN		 2380 ret = -ENXIO;
2381 goto err_kfree;
4365831d 2382 }
b504882d 2383
83722bc9 2384 if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
28f65c11 2385 if (!request_mem_region(res->start, resource_size(res),
83722bc9
AG		 2386 driver_name)) {
2387 ERR("request mem region for %s failed\n", pdev->name);
2388 ret = -EBUSY;
2389 goto err_kfree;
2390 }
b504882d
LY		 2391 }
2392
54e4026b 2393 dr_regs = ioremap(res->start, resource_size(res));
b504882d
LY		 2394 if (!dr_regs) {
2395 ret = -ENOMEM;
23d7cd04 2396 goto err_release_mem_region;
b504882d
LY		 2397 }
2398
bbb9f94c 2399 pdata->regs = (void __iomem *)dr_regs;
2ea6698d
AG		 2400
2401 /*
2402 * do platform specific init: check the clock, grab/config pins, etc.
2403 */
2404 if (pdata->init && pdata->init(pdev)) {
2405 ret = -ENODEV;
2406 goto err_iounmap_noclk;
2407 }
2408
2409 /* Set accessors only after pdata->init() ! */
3140d5b2 2410 fsl_set_accessors(pdata);
09ba0def 2411
54e4026b 2412#ifndef CONFIG_ARCH_MXC
2ea6698d 2413 if (pdata->have_sysif_regs)
8981d76a 2414 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
54e4026b
GL		 2415#endif
2416
2417 /* Initialize USB clocks */
2418 ret = fsl_udc_clk_init(pdev);
2419 if (ret < 0)
2420 goto err_iounmap_noclk;
b504882d 2421
4365831d
LY		 2422 /* Read Device Controller Capability Parameters register */
2423 dccparams = fsl_readl(&dr_regs->dccparams);
2424 if (!(dccparams & DCCPARAMS_DC)) {
2425 ERR("This SOC doesn't support device role\n");
2426 ret = -ENODEV;
23d7cd04 2427 goto err_iounmap;
4365831d
LY		 2428 }
2429 /* Get max device endpoints */
2430 /* DEN is bidirectional ep number, max_ep doubles the number */
2431 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2432
b504882d
LY		 2433 udc_controller->irq = platform_get_irq(pdev, 0);
2434 if (!udc_controller->irq) {
2435 ret = -ENODEV;
23d7cd04 2436 goto err_iounmap;
b504882d
LY		 2437 }
2438
37b5453d 2439 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
b504882d
LY		 2440 driver_name, udc_controller);
2441 if (ret != 0) {
bf7409a2 2442 ERR("cannot request irq %d err %d\n",
b504882d 2443 udc_controller->irq, ret);
23d7cd04 2444 goto err_iounmap;
b504882d
LY		 2445 }
2446
4365831d
LY		 2447 /* Initialize the udc structure including QH member and other member */
2448 if (struct_udc_setup(udc_controller, pdev)) {
2449 ERR("Can't initialize udc data structure\n");
2450 ret = -ENOMEM;
23d7cd04 2451 goto err_free_irq;
4365831d
LY		 2452 }
2453
ded017ee 2454 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
83722bc9
AG		 2455 /* initialize usb hw reg except for regs for EP,
2456 * leave usbintr reg untouched */
2457 dr_controller_setup(udc_controller);
2458 }
b504882d 2459
c2c9caa9
PC		 2460 ret = fsl_udc_clk_finalize(pdev);
2461 if (ret)
2462 goto err_free_irq;
54e4026b 2463
b504882d
LY		 2464 /* Setup gadget structure */
2465 udc_controller->gadget.ops = &fsl_gadget_ops;
d327ab5b 2466 udc_controller->gadget.max_speed = USB_SPEED_HIGH;
b504882d
LY		 2467 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2468 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2469 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2470 udc_controller->gadget.name = driver_name;
2471
2472 /* Setup gadget.dev and register with kernel */
0031a06e 2473 dev_set_name(&udc_controller->gadget.dev, "gadget");
cb4baf10 2474 udc_controller->gadget.dev.of_node = pdev->dev.of_node;
b504882d 2475
ded017ee 2476 if (!IS_ERR_OR_NULL(udc_controller->transceiver))
83722bc9
AG		 2477 udc_controller->gadget.is_otg = 1;
2478
b504882d
LY		 2479 /* setup QH and epctrl for ep0 */
2480 ep0_setup(udc_controller);
2481
2482 /* setup udc->eps[] for ep0 */
2483 struct_ep_setup(udc_controller, 0, "ep0", 0);
2484 /* for ep0: the desc defined here;
2485 * for other eps, gadget layer called ep_enable with defined desc
2486 */
80e91fd5 2487 udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
e117e742
RB		 2488 usb_ep_set_maxpacket_limit(&udc_controller->eps[0].ep,
2489 USB_MAX_CTRL_PAYLOAD);
b504882d
LY		 2490
2491 /* setup the udc->eps[] for non-control endpoints and link
2492 * to gadget.ep_list */
2493 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2494 char name[14];
2495
2496 sprintf(name, "ep%dout", i);
2497 struct_ep_setup(udc_controller, i * 2, name, 1);
2498 sprintf(name, "ep%din", i);
2499 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2500 }
2501
2502 /* use dma_pool for TD management */
2503 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2504 sizeof(struct ep_td_struct),
2505 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2506 if (udc_controller->td_pool == NULL) {
2507 ret = -ENOMEM;
eab35c4e 2508 goto err_free_irq;
b504882d 2509 }
0f91349b 2510
0e4d65e5
FB		 2511 ret = usb_add_gadget_udc_release(&pdev->dev, &udc_controller->gadget,
2512 fsl_udc_release);
0f91349b
SAS		 2513 if (ret)
2514 goto err_del_udc;
2515
b504882d
LY		 2516 create_proc_file();
2517 return 0;
2518
0f91349b
SAS		 2519err_del_udc:
2520 dma_pool_destroy(udc_controller->td_pool);
23d7cd04 2521err_free_irq:
b504882d 2522 free_irq(udc_controller->irq, udc_controller);
23d7cd04 2523err_iounmap:
2ea6698d
AG		 2524 if (pdata->exit)
2525 pdata->exit(pdev);
54e4026b
GL		 2526 fsl_udc_clk_release();
2527err_iounmap_noclk:
b504882d 2528 iounmap(dr_regs);
23d7cd04 2529err_release_mem_region:
83722bc9 2530 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
28f65c11 2531 release_mem_region(res->start, resource_size(res));
23d7cd04 2532err_kfree:
4365831d 2533 kfree(udc_controller);
23d7cd04 2534 udc_controller = NULL;
b504882d
LY		 2535 return ret;
2536}
2537
2538/* Driver removal function
2539 * Free resources and finish pending transactions
2540 */
c94e289f 2541static int fsl_udc_remove(struct platform_device *pdev)
b504882d
LY		 2542{
2543 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
e01ee9f5 2544 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
b504882d 2545
9f56ce07 2546 DECLARE_COMPLETION_ONSTACK(done);
b504882d
LY		 2547
2548 if (!udc_controller)
2549 return -ENODEV;
0f91349b 2550
b504882d 2551 udc_controller->done = &done;
fc696881 2552 usb_del_gadget_udc(&udc_controller->gadget);
b504882d 2553
54e4026b
GL		 2554 fsl_udc_clk_release();
2555
b504882d
LY		 2556 /* DR has been stopped in usb_gadget_unregister_driver() */
2557 remove_proc_file();
2558
2559 /* Free allocated memory */
2560 kfree(udc_controller->status_req->req.buf);
2561 kfree(udc_controller->status_req);
2562 kfree(udc_controller->eps);
2563
2564 dma_pool_destroy(udc_controller->td_pool);
2565 free_irq(udc_controller->irq, udc_controller);
2566 iounmap(dr_regs);
83722bc9 2567 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
28f65c11 2568 release_mem_region(res->start, resource_size(res));
b504882d 2569
b504882d
LY		 2570 /* free udc --wait for the release() finished */
2571 wait_for_completion(&done);
2572
2ea6698d
AG		 2573 /*
2574 * do platform specific un-initialization:
2575 * release iomux pins, etc.
2576 */
2577 if (pdata->exit)
2578 pdata->exit(pdev);
2579
b504882d
LY		 2580 return 0;
2581}
2582
2583/*-----------------------------------------------------------------
2584 * Modify Power management attributes
2585 * Used by OTG statemachine to disable gadget temporarily
2586 -----------------------------------------------------------------*/
2587static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2588{
2589 dr_controller_stop(udc_controller);
2590 return 0;
2591}
2592
2593/*-----------------------------------------------------------------
2594 * Invoked on USB resume. May be called in_interrupt.
2595 * Here we start the DR controller and enable the irq
2596 *-----------------------------------------------------------------*/
2597static int fsl_udc_resume(struct platform_device *pdev)
2598{
2599 /* Enable DR irq reg and set controller Run */
2600 if (udc_controller->stopped) {
2601 dr_controller_setup(udc_controller);
2602 dr_controller_run(udc_controller);
2603 }
2604 udc_controller->usb_state = USB_STATE_ATTACHED;
2605 udc_controller->ep0_state = WAIT_FOR_SETUP;
2606 udc_controller->ep0_dir = 0;
2607 return 0;
2608}
2609
83722bc9
AG		 2610static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2611{
2612 struct fsl_udc *udc = udc_controller;
2613 u32 mode, usbcmd;
2614
2615 mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2616
2617 pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2618
2619 /*
2620 * If the controller is already stopped, then this must be a
2621 * PM suspend. Remember this fact, so that we will leave the
2622 * controller stopped at PM resume time.
2623 */
2624 if (udc->stopped) {
2625 pr_debug("gadget already stopped, leaving early\n");
2626 udc->already_stopped = 1;
2627 return 0;
2628 }
2629
2630 if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2631 pr_debug("gadget not in device mode, leaving early\n");
2632 return 0;
2633 }
2634
2635 /* stop the controller */
2636 usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2637 fsl_writel(usbcmd, &dr_regs->usbcmd);
2638
2639 udc->stopped = 1;
2640
2641 pr_info("USB Gadget suspended\n");
2642
2643 return 0;
2644}
2645
2646static int fsl_udc_otg_resume(struct device *dev)
2647{
2648 pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
2649 udc_controller->stopped, udc_controller->already_stopped);
2650
2651 /*
2652 * If the controller was stopped at suspend time, then
2653 * don't resume it now.
2654 */
2655 if (udc_controller->already_stopped) {
2656 udc_controller->already_stopped = 0;
2657 pr_debug("gadget was already stopped, leaving early\n");
2658 return 0;
2659 }
2660
2661 pr_info("USB Gadget resume\n");
2662
2663 return fsl_udc_resume(NULL);
2664}
b504882d
LY		 2665/*-------------------------------------------------------------------------
2666 Register entry point for the peripheral controller driver
2667--------------------------------------------------------------------------*/
f0ea8834
PC		 2668static const struct platform_device_id fsl_udc_devtype[] = {
2669 {
2670 .name = "imx-udc-mx27",
2671 }, {
2672 .name = "imx-udc-mx51",
2673 }, {
2674 /* sentinel */
2675 }
2676};
2677MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
b504882d 2678static struct platform_driver udc_driver = {
c94e289f 2679 .remove = fsl_udc_remove,
f0ea8834
PC		 2680 /* Just for FSL i.mx SoC currently */
2681 .id_table = fsl_udc_devtype,
b504882d 2682 /* these suspend and resume are not usb suspend and resume */
f0ea8834
PC		 2683 .suspend = fsl_udc_suspend,
2684 .resume = fsl_udc_resume,
2685 .driver = {
7de7174a 2686 .name = driver_name,
f0ea8834
PC		 2687 /* udc suspend/resume called from OTG driver */
2688 .suspend = fsl_udc_otg_suspend,
2689 .resume = fsl_udc_otg_resume,
b504882d
LY		 2690 },
2691};
2692
d25ab3ec 2693module_platform_driver_probe(udc_driver, fsl_udc_probe);
b504882d
LY		 2694
2695MODULE_DESCRIPTION(DRIVER_DESC);
2696MODULE_AUTHOR(DRIVER_AUTHOR);
2697MODULE_LICENSE("GPL");
f34c32f1 2698MODULE_ALIAS("platform:fsl-usb2-udc");
Linux kernel - Deliverables
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