2 * Driver for the Atmel USBA high speed USB device controller
4 * Copyright (C) 2005-2007 Atmel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/clk.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/interrupt.h>
15 #include <linux/slab.h>
16 #include <linux/device.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/list.h>
19 #include <linux/platform_device.h>
20 #include <linux/usb/ch9.h>
21 #include <linux/usb/gadget.h>
22 #include <linux/usb/atmel_usba_udc.h>
23 #include <linux/delay.h>
26 #include <mach/board.h>
28 #include "atmel_usba_udc.h"
31 static struct usba_udc the_udc;
32 static struct usba_ep *usba_ep;
34 #ifdef CONFIG_USB_GADGET_DEBUG_FS
35 #include <linux/debugfs.h>
36 #include <linux/uaccess.h>
38 static int queue_dbg_open(struct inode *inode, struct file *file)
40 struct usba_ep *ep = inode->i_private;
41 struct usba_request *req, *req_copy;
42 struct list_head *queue_data;
44 queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
47 INIT_LIST_HEAD(queue_data);
49 spin_lock_irq(&ep->udc->lock);
50 list_for_each_entry(req, &ep->queue, queue) {
51 req_copy = kmalloc(sizeof(*req_copy), GFP_ATOMIC);
54 memcpy(req_copy, req, sizeof(*req_copy));
55 list_add_tail(&req_copy->queue, queue_data);
57 spin_unlock_irq(&ep->udc->lock);
59 file->private_data = queue_data;
63 spin_unlock_irq(&ep->udc->lock);
64 list_for_each_entry_safe(req, req_copy, queue_data, queue) {
65 list_del(&req->queue);
73 * bbbbbbbb llllllll IZS sssss nnnn FDL\n\0
77 * I/i: interrupt/no interrupt
79 * S/s: short ok/short not ok
82 * F/f: submitted/not submitted to FIFO
83 * D/d: using/not using DMA
84 * L/l: last transaction/not last transaction
86 static ssize_t queue_dbg_read(struct file *file, char __user *buf,
87 size_t nbytes, loff_t *ppos)
89 struct list_head *queue = file->private_data;
90 struct usba_request *req, *tmp_req;
91 size_t len, remaining, actual = 0;
94 if (!access_ok(VERIFY_WRITE, buf, nbytes))
97 mutex_lock(&file->f_dentry->d_inode->i_mutex);
98 list_for_each_entry_safe(req, tmp_req, queue, queue) {
99 len = snprintf(tmpbuf, sizeof(tmpbuf),
100 "%8p %08x %c%c%c %5d %c%c%c\n",
101 req->req.buf, req->req.length,
102 req->req.no_interrupt ? 'i' : 'I',
103 req->req.zero ? 'Z' : 'z',
104 req->req.short_not_ok ? 's' : 'S',
106 req->submitted ? 'F' : 'f',
107 req->using_dma ? 'D' : 'd',
108 req->last_transaction ? 'L' : 'l');
109 len = min(len, sizeof(tmpbuf));
113 list_del(&req->queue);
116 remaining = __copy_to_user(buf, tmpbuf, len);
117 actual += len - remaining;
124 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
129 static int queue_dbg_release(struct inode *inode, struct file *file)
131 struct list_head *queue_data = file->private_data;
132 struct usba_request *req, *tmp_req;
134 list_for_each_entry_safe(req, tmp_req, queue_data, queue) {
135 list_del(&req->queue);
142 static int regs_dbg_open(struct inode *inode, struct file *file)
144 struct usba_udc *udc;
149 mutex_lock(&inode->i_mutex);
150 udc = inode->i_private;
151 data = kmalloc(inode->i_size, GFP_KERNEL);
155 spin_lock_irq(&udc->lock);
156 for (i = 0; i < inode->i_size / 4; i++)
157 data[i] = __raw_readl(udc->regs + i * 4);
158 spin_unlock_irq(&udc->lock);
160 file->private_data = data;
164 mutex_unlock(&inode->i_mutex);
169 static ssize_t regs_dbg_read(struct file *file, char __user *buf,
170 size_t nbytes, loff_t *ppos)
172 struct inode *inode = file->f_dentry->d_inode;
175 mutex_lock(&inode->i_mutex);
176 ret = simple_read_from_buffer(buf, nbytes, ppos,
178 file->f_dentry->d_inode->i_size);
179 mutex_unlock(&inode->i_mutex);
184 static int regs_dbg_release(struct inode *inode, struct file *file)
186 kfree(file->private_data);
190 const struct file_operations queue_dbg_fops = {
191 .owner = THIS_MODULE,
192 .open = queue_dbg_open,
194 .read = queue_dbg_read,
195 .release = queue_dbg_release,
198 const struct file_operations regs_dbg_fops = {
199 .owner = THIS_MODULE,
200 .open = regs_dbg_open,
201 .llseek = generic_file_llseek,
202 .read = regs_dbg_read,
203 .release = regs_dbg_release,
206 static void usba_ep_init_debugfs(struct usba_udc *udc,
209 struct dentry *ep_root;
211 ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root);
214 ep->debugfs_dir = ep_root;
216 ep->debugfs_queue = debugfs_create_file("queue", 0400, ep_root,
217 ep, &queue_dbg_fops);
218 if (!ep->debugfs_queue)
222 ep->debugfs_dma_status
223 = debugfs_create_u32("dma_status", 0400, ep_root,
224 &ep->last_dma_status);
225 if (!ep->debugfs_dma_status)
228 if (ep_is_control(ep)) {
230 = debugfs_create_u32("state", 0400, ep_root,
232 if (!ep->debugfs_state)
240 debugfs_remove(ep->debugfs_dma_status);
242 debugfs_remove(ep->debugfs_queue);
244 debugfs_remove(ep_root);
246 dev_err(&ep->udc->pdev->dev,
247 "failed to create debugfs directory for %s\n", ep->ep.name);
250 static void usba_ep_cleanup_debugfs(struct usba_ep *ep)
252 debugfs_remove(ep->debugfs_queue);
253 debugfs_remove(ep->debugfs_dma_status);
254 debugfs_remove(ep->debugfs_state);
255 debugfs_remove(ep->debugfs_dir);
256 ep->debugfs_dma_status = NULL;
257 ep->debugfs_dir = NULL;
260 static void usba_init_debugfs(struct usba_udc *udc)
262 struct dentry *root, *regs;
263 struct resource *regs_resource;
265 root = debugfs_create_dir(udc->gadget.name, NULL);
266 if (IS_ERR(root) || !root)
268 udc->debugfs_root = root;
270 regs = debugfs_create_file("regs", 0400, root, udc, ®s_dbg_fops);
274 regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
276 regs->d_inode->i_size = regs_resource->end - regs_resource->start + 1;
277 udc->debugfs_regs = regs;
279 usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
284 debugfs_remove(root);
286 udc->debugfs_root = NULL;
287 dev_err(&udc->pdev->dev, "debugfs is not available\n");
290 static void usba_cleanup_debugfs(struct usba_udc *udc)
292 usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0));
293 debugfs_remove(udc->debugfs_regs);
294 debugfs_remove(udc->debugfs_root);
295 udc->debugfs_regs = NULL;
296 udc->debugfs_root = NULL;
299 static inline void usba_ep_init_debugfs(struct usba_udc *udc,
305 static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
310 static inline void usba_init_debugfs(struct usba_udc *udc)
315 static inline void usba_cleanup_debugfs(struct usba_udc *udc)
321 static int vbus_is_present(struct usba_udc *udc)
323 if (gpio_is_valid(udc->vbus_pin))
324 return gpio_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
326 /* No Vbus detection: Assume always present */
330 #if defined(CONFIG_ARCH_AT91SAM9RL)
332 #include <mach/at91_pmc.h>
334 static void toggle_bias(int is_on)
336 unsigned int uckr = at91_sys_read(AT91_CKGR_UCKR);
339 at91_sys_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
341 at91_sys_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
346 static void toggle_bias(int is_on)
350 #endif /* CONFIG_ARCH_AT91SAM9RL */
352 static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
354 unsigned int transaction_len;
356 transaction_len = req->req.length - req->req.actual;
357 req->last_transaction = 1;
358 if (transaction_len > ep->ep.maxpacket) {
359 transaction_len = ep->ep.maxpacket;
360 req->last_transaction = 0;
361 } else if (transaction_len == ep->ep.maxpacket && req->req.zero)
362 req->last_transaction = 0;
364 DBG(DBG_QUEUE, "%s: submit_transaction, req %p (length %d)%s\n",
365 ep->ep.name, req, transaction_len,
366 req->last_transaction ? ", done" : "");
368 memcpy_toio(ep->fifo, req->req.buf + req->req.actual, transaction_len);
369 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
370 req->req.actual += transaction_len;
373 static void submit_request(struct usba_ep *ep, struct usba_request *req)
375 DBG(DBG_QUEUE, "%s: submit_request: req %p (length %d)\n",
376 ep->ep.name, req, req->req.length);
381 if (req->using_dma) {
382 if (req->req.length == 0) {
383 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
388 usba_ep_writel(ep, CTL_ENB, USBA_SHORT_PACKET);
390 usba_ep_writel(ep, CTL_DIS, USBA_SHORT_PACKET);
392 usba_dma_writel(ep, ADDRESS, req->req.dma);
393 usba_dma_writel(ep, CONTROL, req->ctrl);
395 next_fifo_transaction(ep, req);
396 if (req->last_transaction) {
397 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
398 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
400 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
401 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
406 static void submit_next_request(struct usba_ep *ep)
408 struct usba_request *req;
410 if (list_empty(&ep->queue)) {
411 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY | USBA_RX_BK_RDY);
415 req = list_entry(ep->queue.next, struct usba_request, queue);
417 submit_request(ep, req);
420 static void send_status(struct usba_udc *udc, struct usba_ep *ep)
422 ep->state = STATUS_STAGE_IN;
423 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
424 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
427 static void receive_data(struct usba_ep *ep)
429 struct usba_udc *udc = ep->udc;
430 struct usba_request *req;
431 unsigned long status;
432 unsigned int bytecount, nr_busy;
435 status = usba_ep_readl(ep, STA);
436 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
438 DBG(DBG_QUEUE, "receive data: nr_busy=%u\n", nr_busy);
440 while (nr_busy > 0) {
441 if (list_empty(&ep->queue)) {
442 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
445 req = list_entry(ep->queue.next,
446 struct usba_request, queue);
448 bytecount = USBA_BFEXT(BYTE_COUNT, status);
450 if (status & (1 << 31))
452 if (req->req.actual + bytecount >= req->req.length) {
454 bytecount = req->req.length - req->req.actual;
457 memcpy_fromio(req->req.buf + req->req.actual,
458 ep->fifo, bytecount);
459 req->req.actual += bytecount;
461 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
464 DBG(DBG_QUEUE, "%s: request done\n", ep->ep.name);
466 list_del_init(&req->queue);
467 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
468 spin_unlock(&udc->lock);
469 req->req.complete(&ep->ep, &req->req);
470 spin_lock(&udc->lock);
473 status = usba_ep_readl(ep, STA);
474 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
476 if (is_complete && ep_is_control(ep)) {
477 send_status(udc, ep);
484 request_complete(struct usba_ep *ep, struct usba_request *req, int status)
486 struct usba_udc *udc = ep->udc;
488 WARN_ON(!list_empty(&req->queue));
490 if (req->req.status == -EINPROGRESS)
491 req->req.status = status;
495 &udc->pdev->dev, req->req.dma, req->req.length,
496 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
497 req->req.dma = DMA_ADDR_INVALID;
501 DBG(DBG_GADGET | DBG_REQ,
502 "%s: req %p complete: status %d, actual %u\n",
503 ep->ep.name, req, req->req.status, req->req.actual);
505 spin_unlock(&udc->lock);
506 req->req.complete(&ep->ep, &req->req);
507 spin_lock(&udc->lock);
511 request_complete_list(struct usba_ep *ep, struct list_head *list, int status)
513 struct usba_request *req, *tmp_req;
515 list_for_each_entry_safe(req, tmp_req, list, queue) {
516 list_del_init(&req->queue);
517 request_complete(ep, req, status);
522 usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
524 struct usba_ep *ep = to_usba_ep(_ep);
525 struct usba_udc *udc = ep->udc;
526 unsigned long flags, ept_cfg, maxpacket;
527 unsigned int nr_trans;
529 DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
531 maxpacket = le16_to_cpu(desc->wMaxPacketSize) & 0x7ff;
533 if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
535 || desc->bDescriptorType != USB_DT_ENDPOINT
537 || maxpacket > ep->fifo_size) {
538 DBG(DBG_ERR, "ep_enable: Invalid argument");
546 ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
548 /* LSB is bit 1, not 0 */
549 ept_cfg = USBA_BF(EPT_SIZE, fls(maxpacket - 1) - 3);
551 DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
552 ep->ep.name, ept_cfg, maxpacket);
554 if (usb_endpoint_dir_in(desc)) {
556 ept_cfg |= USBA_EPT_DIR_IN;
559 switch (usb_endpoint_type(desc)) {
560 case USB_ENDPOINT_XFER_CONTROL:
561 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
562 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
564 case USB_ENDPOINT_XFER_ISOC:
566 DBG(DBG_ERR, "ep_enable: %s is not isoc capable\n",
572 * Bits 11:12 specify number of _additional_
573 * transactions per microframe.
575 nr_trans = ((le16_to_cpu(desc->wMaxPacketSize) >> 11) & 3) + 1;
580 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
583 * Do triple-buffering on high-bandwidth iso endpoints.
585 if (nr_trans > 1 && ep->nr_banks == 3)
586 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_TRIPLE);
588 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
589 ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
591 case USB_ENDPOINT_XFER_BULK:
592 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
593 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
595 case USB_ENDPOINT_XFER_INT:
596 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
597 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
601 spin_lock_irqsave(&ep->udc->lock, flags);
604 spin_unlock_irqrestore(&ep->udc->lock, flags);
605 DBG(DBG_ERR, "ep%d already enabled\n", ep->index);
610 ep->ep.maxpacket = maxpacket;
612 usba_ep_writel(ep, CFG, ept_cfg);
613 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
618 usba_writel(udc, INT_ENB,
619 (usba_readl(udc, INT_ENB)
620 | USBA_BF(EPT_INT, 1 << ep->index)
621 | USBA_BF(DMA_INT, 1 << ep->index)));
622 ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
623 usba_ep_writel(ep, CTL_ENB, ctrl);
625 usba_writel(udc, INT_ENB,
626 (usba_readl(udc, INT_ENB)
627 | USBA_BF(EPT_INT, 1 << ep->index)));
630 spin_unlock_irqrestore(&udc->lock, flags);
632 DBG(DBG_HW, "EPT_CFG%d after init: %#08lx\n", ep->index,
633 (unsigned long)usba_ep_readl(ep, CFG));
634 DBG(DBG_HW, "INT_ENB after init: %#08lx\n",
635 (unsigned long)usba_readl(udc, INT_ENB));
640 static int usba_ep_disable(struct usb_ep *_ep)
642 struct usba_ep *ep = to_usba_ep(_ep);
643 struct usba_udc *udc = ep->udc;
647 DBG(DBG_GADGET, "ep_disable: %s\n", ep->ep.name);
649 spin_lock_irqsave(&udc->lock, flags);
652 spin_unlock_irqrestore(&udc->lock, flags);
653 /* REVISIT because this driver disables endpoints in
654 * reset_all_endpoints() before calling disconnect(),
655 * most gadget drivers would trigger this non-error ...
657 if (udc->gadget.speed != USB_SPEED_UNKNOWN)
658 DBG(DBG_ERR, "ep_disable: %s not enabled\n",
664 list_splice_init(&ep->queue, &req_list);
666 usba_dma_writel(ep, CONTROL, 0);
667 usba_dma_writel(ep, ADDRESS, 0);
668 usba_dma_readl(ep, STATUS);
670 usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
671 usba_writel(udc, INT_ENB,
672 usba_readl(udc, INT_ENB)
673 & ~USBA_BF(EPT_INT, 1 << ep->index));
675 request_complete_list(ep, &req_list, -ESHUTDOWN);
677 spin_unlock_irqrestore(&udc->lock, flags);
682 static struct usb_request *
683 usba_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
685 struct usba_request *req;
687 DBG(DBG_GADGET, "ep_alloc_request: %p, 0x%x\n", _ep, gfp_flags);
689 req = kzalloc(sizeof(*req), gfp_flags);
693 INIT_LIST_HEAD(&req->queue);
694 req->req.dma = DMA_ADDR_INVALID;
700 usba_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
702 struct usba_request *req = to_usba_req(_req);
704 DBG(DBG_GADGET, "ep_free_request: %p, %p\n", _ep, _req);
709 static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
710 struct usba_request *req, gfp_t gfp_flags)
715 DBG(DBG_DMA, "%s: req l/%u d/%08x %c%c%c\n",
716 ep->ep.name, req->req.length, req->req.dma,
717 req->req.zero ? 'Z' : 'z',
718 req->req.short_not_ok ? 'S' : 's',
719 req->req.no_interrupt ? 'I' : 'i');
721 if (req->req.length > 0x10000) {
722 /* Lengths from 0 to 65536 (inclusive) are supported */
723 DBG(DBG_ERR, "invalid request length %u\n", req->req.length);
729 if (req->req.dma == DMA_ADDR_INVALID) {
730 req->req.dma = dma_map_single(
731 &udc->pdev->dev, req->req.buf, req->req.length,
732 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
735 dma_sync_single_for_device(
736 &udc->pdev->dev, req->req.dma, req->req.length,
737 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
741 req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
742 | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
743 | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
746 req->ctrl |= USBA_DMA_END_BUF_EN;
749 * Add this request to the queue and submit for DMA if
750 * possible. Check if we're still alive first -- we may have
751 * received a reset since last time we checked.
754 spin_lock_irqsave(&udc->lock, flags);
756 if (list_empty(&ep->queue))
757 submit_request(ep, req);
759 list_add_tail(&req->queue, &ep->queue);
762 spin_unlock_irqrestore(&udc->lock, flags);
768 usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
770 struct usba_request *req = to_usba_req(_req);
771 struct usba_ep *ep = to_usba_ep(_ep);
772 struct usba_udc *udc = ep->udc;
776 DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
777 ep->ep.name, req, _req->length);
779 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN || !ep->desc)
784 req->last_transaction = 0;
786 _req->status = -EINPROGRESS;
790 return queue_dma(udc, ep, req, gfp_flags);
792 /* May have received a reset since last time we checked */
794 spin_lock_irqsave(&udc->lock, flags);
796 list_add_tail(&req->queue, &ep->queue);
798 if ((!ep_is_control(ep) && ep->is_in) ||
800 && (ep->state == DATA_STAGE_IN
801 || ep->state == STATUS_STAGE_IN)))
802 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
804 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
807 spin_unlock_irqrestore(&udc->lock, flags);
813 usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
815 req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
818 static int stop_dma(struct usba_ep *ep, u32 *pstatus)
820 unsigned int timeout;
824 * Stop the DMA controller. When writing both CH_EN
825 * and LINK to 0, the other bits are not affected.
827 usba_dma_writel(ep, CONTROL, 0);
829 /* Wait for the FIFO to empty */
830 for (timeout = 40; timeout; --timeout) {
831 status = usba_dma_readl(ep, STATUS);
832 if (!(status & USBA_DMA_CH_EN))
841 dev_err(&ep->udc->pdev->dev,
842 "%s: timed out waiting for DMA FIFO to empty\n",
850 static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
852 struct usba_ep *ep = to_usba_ep(_ep);
853 struct usba_udc *udc = ep->udc;
854 struct usba_request *req = to_usba_req(_req);
858 DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
861 spin_lock_irqsave(&udc->lock, flags);
863 if (req->using_dma) {
865 * If this request is currently being transferred,
866 * stop the DMA controller and reset the FIFO.
868 if (ep->queue.next == &req->queue) {
869 status = usba_dma_readl(ep, STATUS);
870 if (status & USBA_DMA_CH_EN)
871 stop_dma(ep, &status);
873 #ifdef CONFIG_USB_GADGET_DEBUG_FS
874 ep->last_dma_status = status;
877 usba_writel(udc, EPT_RST, 1 << ep->index);
879 usba_update_req(ep, req, status);
884 * Errors should stop the queue from advancing until the
885 * completion function returns.
887 list_del_init(&req->queue);
889 request_complete(ep, req, -ECONNRESET);
891 /* Process the next request if any */
892 submit_next_request(ep);
893 spin_unlock_irqrestore(&udc->lock, flags);
898 static int usba_ep_set_halt(struct usb_ep *_ep, int value)
900 struct usba_ep *ep = to_usba_ep(_ep);
901 struct usba_udc *udc = ep->udc;
905 DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
906 value ? "set" : "clear");
909 DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
914 DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
919 spin_lock_irqsave(&udc->lock, flags);
922 * We can't halt IN endpoints while there are still data to be
925 if (!list_empty(&ep->queue)
926 || ((value && ep->is_in && (usba_ep_readl(ep, STA)
927 & USBA_BF(BUSY_BANKS, -1L))))) {
931 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
933 usba_ep_writel(ep, CLR_STA,
934 USBA_FORCE_STALL | USBA_TOGGLE_CLR);
935 usba_ep_readl(ep, STA);
938 spin_unlock_irqrestore(&udc->lock, flags);
943 static int usba_ep_fifo_status(struct usb_ep *_ep)
945 struct usba_ep *ep = to_usba_ep(_ep);
947 return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
950 static void usba_ep_fifo_flush(struct usb_ep *_ep)
952 struct usba_ep *ep = to_usba_ep(_ep);
953 struct usba_udc *udc = ep->udc;
955 usba_writel(udc, EPT_RST, 1 << ep->index);
958 static const struct usb_ep_ops usba_ep_ops = {
959 .enable = usba_ep_enable,
960 .disable = usba_ep_disable,
961 .alloc_request = usba_ep_alloc_request,
962 .free_request = usba_ep_free_request,
963 .queue = usba_ep_queue,
964 .dequeue = usba_ep_dequeue,
965 .set_halt = usba_ep_set_halt,
966 .fifo_status = usba_ep_fifo_status,
967 .fifo_flush = usba_ep_fifo_flush,
970 static int usba_udc_get_frame(struct usb_gadget *gadget)
972 struct usba_udc *udc = to_usba_udc(gadget);
974 return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
977 static int usba_udc_wakeup(struct usb_gadget *gadget)
979 struct usba_udc *udc = to_usba_udc(gadget);
984 spin_lock_irqsave(&udc->lock, flags);
985 if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
986 ctrl = usba_readl(udc, CTRL);
987 usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
990 spin_unlock_irqrestore(&udc->lock, flags);
996 usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
998 struct usba_udc *udc = to_usba_udc(gadget);
1001 spin_lock_irqsave(&udc->lock, flags);
1003 udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
1005 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1006 spin_unlock_irqrestore(&udc->lock, flags);
1011 static const struct usb_gadget_ops usba_udc_ops = {
1012 .get_frame = usba_udc_get_frame,
1013 .wakeup = usba_udc_wakeup,
1014 .set_selfpowered = usba_udc_set_selfpowered,
1017 static struct usb_endpoint_descriptor usba_ep0_desc = {
1018 .bLength = USB_DT_ENDPOINT_SIZE,
1019 .bDescriptorType = USB_DT_ENDPOINT,
1020 .bEndpointAddress = 0,
1021 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1022 .wMaxPacketSize = cpu_to_le16(64),
1023 /* FIXME: I have no idea what to put here */
1027 static void nop_release(struct device *dev)
1032 static struct usba_udc the_udc = {
1034 .ops = &usba_udc_ops,
1035 .ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
1037 .name = "atmel_usba_udc",
1039 .init_name = "gadget",
1040 .release = nop_release,
1046 * Called with interrupts disabled and udc->lock held.
1048 static void reset_all_endpoints(struct usba_udc *udc)
1051 struct usba_request *req, *tmp_req;
1053 usba_writel(udc, EPT_RST, ~0UL);
1055 ep = to_usba_ep(udc->gadget.ep0);
1056 list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1057 list_del_init(&req->queue);
1058 request_complete(ep, req, -ECONNRESET);
1061 /* NOTE: normally, the next call to the gadget driver is in
1062 * charge of disabling endpoints... usually disconnect().
1063 * The exception would be entering a high speed test mode.
1065 * FIXME remove this code ... and retest thoroughly.
1067 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1069 spin_unlock(&udc->lock);
1070 usba_ep_disable(&ep->ep);
1071 spin_lock(&udc->lock);
1076 static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1080 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1081 return to_usba_ep(udc->gadget.ep0);
1083 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1084 u8 bEndpointAddress;
1088 bEndpointAddress = ep->desc->bEndpointAddress;
1089 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1091 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1092 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1099 /* Called with interrupts disabled and udc->lock held */
1100 static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1102 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1103 ep->state = WAIT_FOR_SETUP;
1106 static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1108 if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1113 static inline void set_address(struct usba_udc *udc, unsigned int addr)
1117 DBG(DBG_BUS, "setting address %u...\n", addr);
1118 regval = usba_readl(udc, CTRL);
1119 regval = USBA_BFINS(DEV_ADDR, addr, regval);
1120 usba_writel(udc, CTRL, regval);
1123 static int do_test_mode(struct usba_udc *udc)
1125 static const char test_packet_buffer[] = {
1127 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1129 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1131 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1132 /* JJJJJJJKKKKKKK * 8 */
1133 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1134 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1136 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1137 /* {JKKKKKKK * 10}, JK */
1138 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1141 struct device *dev = &udc->pdev->dev;
1144 test_mode = udc->test_mode;
1146 /* Start from a clean slate */
1147 reset_all_endpoints(udc);
1149 switch (test_mode) {
1152 usba_writel(udc, TST, USBA_TST_J_MODE);
1153 dev_info(dev, "Entering Test_J mode...\n");
1157 usba_writel(udc, TST, USBA_TST_K_MODE);
1158 dev_info(dev, "Entering Test_K mode...\n");
1162 * Test_SE0_NAK: Force high-speed mode and set up ep0
1163 * for Bulk IN transfers
1166 usba_writel(udc, TST,
1167 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1168 usba_ep_writel(ep, CFG,
1169 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1171 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1172 | USBA_BF(BK_NUMBER, 1));
1173 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1174 set_protocol_stall(udc, ep);
1175 dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1177 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1178 dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1184 usba_ep_writel(ep, CFG,
1185 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1187 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1188 | USBA_BF(BK_NUMBER, 1));
1189 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1190 set_protocol_stall(udc, ep);
1191 dev_err(dev, "Test_Packet: ep0 not mapped\n");
1193 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1194 usba_writel(udc, TST, USBA_TST_PKT_MODE);
1195 memcpy_toio(ep->fifo, test_packet_buffer,
1196 sizeof(test_packet_buffer));
1197 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1198 dev_info(dev, "Entering Test_Packet mode...\n");
1202 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1209 /* Avoid overly long expressions */
1210 static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1212 if (crq->wValue == cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1217 static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1219 if (crq->wValue == cpu_to_le16(USB_DEVICE_TEST_MODE))
1224 static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1226 if (crq->wValue == cpu_to_le16(USB_ENDPOINT_HALT))
1231 static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1232 struct usb_ctrlrequest *crq)
1236 switch (crq->bRequest) {
1237 case USB_REQ_GET_STATUS: {
1240 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1241 status = cpu_to_le16(udc->devstatus);
1242 } else if (crq->bRequestType
1243 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1244 status = cpu_to_le16(0);
1245 } else if (crq->bRequestType
1246 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1247 struct usba_ep *target;
1249 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1254 if (is_stalled(udc, target))
1255 status |= cpu_to_le16(1);
1259 /* Write directly to the FIFO. No queueing is done. */
1260 if (crq->wLength != cpu_to_le16(sizeof(status)))
1262 ep->state = DATA_STAGE_IN;
1263 __raw_writew(status, ep->fifo);
1264 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1268 case USB_REQ_CLEAR_FEATURE: {
1269 if (crq->bRequestType == USB_RECIP_DEVICE) {
1270 if (feature_is_dev_remote_wakeup(crq))
1272 &= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
1274 /* Can't CLEAR_FEATURE TEST_MODE */
1276 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1277 struct usba_ep *target;
1279 if (crq->wLength != cpu_to_le16(0)
1280 || !feature_is_ep_halt(crq))
1282 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1286 usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1287 if (target->index != 0)
1288 usba_ep_writel(target, CLR_STA,
1294 send_status(udc, ep);
1298 case USB_REQ_SET_FEATURE: {
1299 if (crq->bRequestType == USB_RECIP_DEVICE) {
1300 if (feature_is_dev_test_mode(crq)) {
1301 send_status(udc, ep);
1302 ep->state = STATUS_STAGE_TEST;
1303 udc->test_mode = le16_to_cpu(crq->wIndex);
1305 } else if (feature_is_dev_remote_wakeup(crq)) {
1306 udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
1310 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1311 struct usba_ep *target;
1313 if (crq->wLength != cpu_to_le16(0)
1314 || !feature_is_ep_halt(crq))
1317 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1321 usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1325 send_status(udc, ep);
1329 case USB_REQ_SET_ADDRESS:
1330 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1333 set_address(udc, le16_to_cpu(crq->wValue));
1334 send_status(udc, ep);
1335 ep->state = STATUS_STAGE_ADDR;
1340 spin_unlock(&udc->lock);
1341 retval = udc->driver->setup(&udc->gadget, crq);
1342 spin_lock(&udc->lock);
1348 pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1349 "halting endpoint...\n",
1350 ep->ep.name, crq->bRequestType, crq->bRequest,
1351 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1352 le16_to_cpu(crq->wLength));
1353 set_protocol_stall(udc, ep);
1357 static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1359 struct usba_request *req;
1364 epstatus = usba_ep_readl(ep, STA);
1365 epctrl = usba_ep_readl(ep, CTL);
1367 DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1368 ep->ep.name, ep->state, epstatus, epctrl);
1371 if (!list_empty(&ep->queue))
1372 req = list_entry(ep->queue.next,
1373 struct usba_request, queue);
1375 if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1377 next_fifo_transaction(ep, req);
1379 submit_request(ep, req);
1381 if (req->last_transaction) {
1382 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1383 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1387 if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1388 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1390 switch (ep->state) {
1392 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1393 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1394 ep->state = STATUS_STAGE_OUT;
1396 case STATUS_STAGE_ADDR:
1397 /* Activate our new address */
1398 usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1400 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1401 ep->state = WAIT_FOR_SETUP;
1403 case STATUS_STAGE_IN:
1405 list_del_init(&req->queue);
1406 request_complete(ep, req, 0);
1407 submit_next_request(ep);
1409 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1410 ep->state = WAIT_FOR_SETUP;
1412 case STATUS_STAGE_TEST:
1413 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1414 ep->state = WAIT_FOR_SETUP;
1415 if (do_test_mode(udc))
1416 set_protocol_stall(udc, ep);
1419 pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
1420 "halting endpoint...\n",
1421 ep->ep.name, ep->state);
1422 set_protocol_stall(udc, ep);
1428 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1429 switch (ep->state) {
1430 case STATUS_STAGE_OUT:
1431 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1432 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1435 list_del_init(&req->queue);
1436 request_complete(ep, req, 0);
1438 ep->state = WAIT_FOR_SETUP;
1441 case DATA_STAGE_OUT:
1446 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1447 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1448 pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
1449 "halting endpoint...\n",
1450 ep->ep.name, ep->state);
1451 set_protocol_stall(udc, ep);
1457 if (epstatus & USBA_RX_SETUP) {
1459 struct usb_ctrlrequest crq;
1460 unsigned long data[2];
1462 unsigned int pkt_len;
1465 if (ep->state != WAIT_FOR_SETUP) {
1467 * Didn't expect a SETUP packet at this
1468 * point. Clean up any pending requests (which
1469 * may be successful).
1471 int status = -EPROTO;
1474 * RXRDY and TXCOMP are dropped when SETUP
1475 * packets arrive. Just pretend we received
1476 * the status packet.
1478 if (ep->state == STATUS_STAGE_OUT
1479 || ep->state == STATUS_STAGE_IN) {
1480 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1485 list_del_init(&req->queue);
1486 request_complete(ep, req, status);
1490 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1491 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1492 if (pkt_len != sizeof(crq)) {
1493 pr_warning("udc: Invalid packet length %u "
1494 "(expected %zu)\n", pkt_len, sizeof(crq));
1495 set_protocol_stall(udc, ep);
1499 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1500 memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
1502 /* Free up one bank in the FIFO so that we can
1503 * generate or receive a reply right away. */
1504 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1506 /* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
1507 ep->state, crq.crq.bRequestType,
1508 crq.crq.bRequest); */
1510 if (crq.crq.bRequestType & USB_DIR_IN) {
1512 * The USB 2.0 spec states that "if wLength is
1513 * zero, there is no data transfer phase."
1514 * However, testusb #14 seems to actually
1515 * expect a data phase even if wLength = 0...
1517 ep->state = DATA_STAGE_IN;
1519 if (crq.crq.wLength != cpu_to_le16(0))
1520 ep->state = DATA_STAGE_OUT;
1522 ep->state = STATUS_STAGE_IN;
1527 ret = handle_ep0_setup(udc, ep, &crq.crq);
1529 spin_unlock(&udc->lock);
1530 ret = udc->driver->setup(&udc->gadget, &crq.crq);
1531 spin_lock(&udc->lock);
1534 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1535 crq.crq.bRequestType, crq.crq.bRequest,
1536 le16_to_cpu(crq.crq.wLength), ep->state, ret);
1539 /* Let the host know that we failed */
1540 set_protocol_stall(udc, ep);
1545 static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1547 struct usba_request *req;
1551 epstatus = usba_ep_readl(ep, STA);
1552 epctrl = usba_ep_readl(ep, CTL);
1554 DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1556 while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1557 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1559 if (list_empty(&ep->queue)) {
1560 dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1561 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1565 req = list_entry(ep->queue.next, struct usba_request, queue);
1567 if (req->using_dma) {
1568 /* Send a zero-length packet */
1569 usba_ep_writel(ep, SET_STA,
1571 usba_ep_writel(ep, CTL_DIS,
1573 list_del_init(&req->queue);
1574 submit_next_request(ep);
1575 request_complete(ep, req, 0);
1578 next_fifo_transaction(ep, req);
1580 submit_request(ep, req);
1582 if (req->last_transaction) {
1583 list_del_init(&req->queue);
1584 submit_next_request(ep);
1585 request_complete(ep, req, 0);
1589 epstatus = usba_ep_readl(ep, STA);
1590 epctrl = usba_ep_readl(ep, CTL);
1592 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1593 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1595 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1599 static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1601 struct usba_request *req;
1602 u32 status, control, pending;
1604 status = usba_dma_readl(ep, STATUS);
1605 control = usba_dma_readl(ep, CONTROL);
1606 #ifdef CONFIG_USB_GADGET_DEBUG_FS
1607 ep->last_dma_status = status;
1609 pending = status & control;
1610 DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1612 if (status & USBA_DMA_CH_EN) {
1613 dev_err(&udc->pdev->dev,
1614 "DMA_CH_EN is set after transfer is finished!\n");
1615 dev_err(&udc->pdev->dev,
1616 "status=%#08x, pending=%#08x, control=%#08x\n",
1617 status, pending, control);
1620 * try to pretend nothing happened. We might have to
1621 * do something here...
1625 if (list_empty(&ep->queue))
1626 /* Might happen if a reset comes along at the right moment */
1629 if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1630 req = list_entry(ep->queue.next, struct usba_request, queue);
1631 usba_update_req(ep, req, status);
1633 list_del_init(&req->queue);
1634 submit_next_request(ep);
1635 request_complete(ep, req, 0);
1639 static irqreturn_t usba_udc_irq(int irq, void *devid)
1641 struct usba_udc *udc = devid;
1646 spin_lock(&udc->lock);
1648 status = usba_readl(udc, INT_STA);
1649 DBG(DBG_INT, "irq, status=%#08x\n", status);
1651 if (status & USBA_DET_SUSPEND) {
1653 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
1654 DBG(DBG_BUS, "Suspend detected\n");
1655 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1656 && udc->driver && udc->driver->suspend) {
1657 spin_unlock(&udc->lock);
1658 udc->driver->suspend(&udc->gadget);
1659 spin_lock(&udc->lock);
1663 if (status & USBA_WAKE_UP) {
1665 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1666 DBG(DBG_BUS, "Wake Up CPU detected\n");
1669 if (status & USBA_END_OF_RESUME) {
1670 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1671 DBG(DBG_BUS, "Resume detected\n");
1672 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1673 && udc->driver && udc->driver->resume) {
1674 spin_unlock(&udc->lock);
1675 udc->driver->resume(&udc->gadget);
1676 spin_lock(&udc->lock);
1680 dma_status = USBA_BFEXT(DMA_INT, status);
1684 for (i = 1; i < USBA_NR_ENDPOINTS; i++)
1685 if (dma_status & (1 << i))
1686 usba_dma_irq(udc, &usba_ep[i]);
1689 ep_status = USBA_BFEXT(EPT_INT, status);
1693 for (i = 0; i < USBA_NR_ENDPOINTS; i++)
1694 if (ep_status & (1 << i)) {
1695 if (ep_is_control(&usba_ep[i]))
1696 usba_control_irq(udc, &usba_ep[i]);
1698 usba_ep_irq(udc, &usba_ep[i]);
1702 if (status & USBA_END_OF_RESET) {
1703 struct usba_ep *ep0;
1705 usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
1706 reset_all_endpoints(udc);
1708 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1709 && udc->driver->disconnect) {
1710 udc->gadget.speed = USB_SPEED_UNKNOWN;
1711 spin_unlock(&udc->lock);
1712 udc->driver->disconnect(&udc->gadget);
1713 spin_lock(&udc->lock);
1716 if (status & USBA_HIGH_SPEED) {
1717 DBG(DBG_BUS, "High-speed bus reset detected\n");
1718 udc->gadget.speed = USB_SPEED_HIGH;
1720 DBG(DBG_BUS, "Full-speed bus reset detected\n");
1721 udc->gadget.speed = USB_SPEED_FULL;
1725 ep0->desc = &usba_ep0_desc;
1726 ep0->state = WAIT_FOR_SETUP;
1727 usba_ep_writel(ep0, CFG,
1728 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1729 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1730 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1731 usba_ep_writel(ep0, CTL_ENB,
1732 USBA_EPT_ENABLE | USBA_RX_SETUP);
1733 usba_writel(udc, INT_ENB,
1734 (usba_readl(udc, INT_ENB)
1735 | USBA_BF(EPT_INT, 1)
1737 | USBA_END_OF_RESUME));
1740 * Unclear why we hit this irregularly, e.g. in usbtest,
1741 * but it's clearly harmless...
1743 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1744 dev_dbg(&udc->pdev->dev,
1745 "ODD: EP0 configuration is invalid!\n");
1748 spin_unlock(&udc->lock);
1753 static irqreturn_t usba_vbus_irq(int irq, void *devid)
1755 struct usba_udc *udc = devid;
1761 spin_lock(&udc->lock);
1763 /* May happen if Vbus pin toggles during probe() */
1767 vbus = vbus_is_present(udc);
1768 if (vbus != udc->vbus_prev) {
1771 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1772 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1774 udc->gadget.speed = USB_SPEED_UNKNOWN;
1775 reset_all_endpoints(udc);
1777 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1778 if (udc->driver->disconnect) {
1779 spin_unlock(&udc->lock);
1780 udc->driver->disconnect(&udc->gadget);
1781 spin_lock(&udc->lock);
1784 udc->vbus_prev = vbus;
1788 spin_unlock(&udc->lock);
1793 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1795 struct usba_udc *udc = &the_udc;
1796 unsigned long flags;
1802 spin_lock_irqsave(&udc->lock, flags);
1804 spin_unlock_irqrestore(&udc->lock, flags);
1808 udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
1809 udc->driver = driver;
1810 udc->gadget.dev.driver = &driver->driver;
1811 spin_unlock_irqrestore(&udc->lock, flags);
1813 clk_enable(udc->pclk);
1814 clk_enable(udc->hclk);
1816 ret = driver->bind(&udc->gadget);
1818 DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
1819 driver->driver.name, ret);
1820 goto err_driver_bind;
1823 DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
1826 if (gpio_is_valid(udc->vbus_pin))
1827 enable_irq(gpio_to_irq(udc->vbus_pin));
1829 /* If Vbus is present, enable the controller and wait for reset */
1830 spin_lock_irqsave(&udc->lock, flags);
1831 if (vbus_is_present(udc) && udc->vbus_prev == 0) {
1833 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1834 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1836 spin_unlock_irqrestore(&udc->lock, flags);
1842 udc->gadget.dev.driver = NULL;
1845 EXPORT_SYMBOL(usb_gadget_register_driver);
1847 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1849 struct usba_udc *udc = &the_udc;
1850 unsigned long flags;
1854 if (driver != udc->driver || !driver->unbind)
1857 if (gpio_is_valid(udc->vbus_pin))
1858 disable_irq(gpio_to_irq(udc->vbus_pin));
1860 spin_lock_irqsave(&udc->lock, flags);
1861 udc->gadget.speed = USB_SPEED_UNKNOWN;
1862 reset_all_endpoints(udc);
1863 spin_unlock_irqrestore(&udc->lock, flags);
1865 /* This will also disable the DP pullup */
1867 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1869 if (udc->driver->disconnect)
1870 udc->driver->disconnect(&udc->gadget);
1872 driver->unbind(&udc->gadget);
1873 udc->gadget.dev.driver = NULL;
1876 clk_disable(udc->hclk);
1877 clk_disable(udc->pclk);
1879 DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
1883 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1885 static int __init usba_udc_probe(struct platform_device *pdev)
1887 struct usba_platform_data *pdata = pdev->dev.platform_data;
1888 struct resource *regs, *fifo;
1889 struct clk *pclk, *hclk;
1890 struct usba_udc *udc = &the_udc;
1893 regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
1894 fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
1895 if (!regs || !fifo || !pdata)
1898 irq = platform_get_irq(pdev, 0);
1902 pclk = clk_get(&pdev->dev, "pclk");
1904 return PTR_ERR(pclk);
1905 hclk = clk_get(&pdev->dev, "hclk");
1907 ret = PTR_ERR(hclk);
1911 spin_lock_init(&udc->lock);
1915 udc->vbus_pin = -ENODEV;
1918 udc->regs = ioremap(regs->start, resource_size(regs));
1920 dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
1923 dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
1924 (unsigned long)regs->start, udc->regs);
1925 udc->fifo = ioremap(fifo->start, resource_size(fifo));
1927 dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
1930 dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
1931 (unsigned long)fifo->start, udc->fifo);
1933 device_initialize(&udc->gadget.dev);
1934 udc->gadget.dev.parent = &pdev->dev;
1935 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1937 platform_set_drvdata(pdev, udc);
1939 /* Make sure we start from a clean slate */
1942 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1945 usba_ep = kzalloc(sizeof(struct usba_ep) * pdata->num_ep,
1950 the_udc.gadget.ep0 = &usba_ep[0].ep;
1952 INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
1953 usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
1954 usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
1955 usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
1956 usba_ep[0].ep.ops = &usba_ep_ops;
1957 usba_ep[0].ep.name = pdata->ep[0].name;
1958 usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
1959 usba_ep[0].udc = &the_udc;
1960 INIT_LIST_HEAD(&usba_ep[0].queue);
1961 usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
1962 usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
1963 usba_ep[0].index = pdata->ep[0].index;
1964 usba_ep[0].can_dma = pdata->ep[0].can_dma;
1965 usba_ep[0].can_isoc = pdata->ep[0].can_isoc;
1967 for (i = 1; i < pdata->num_ep; i++) {
1968 struct usba_ep *ep = &usba_ep[i];
1970 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1971 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1972 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1973 ep->ep.ops = &usba_ep_ops;
1974 ep->ep.name = pdata->ep[i].name;
1975 ep->ep.maxpacket = pdata->ep[i].fifo_size;
1977 INIT_LIST_HEAD(&ep->queue);
1978 ep->fifo_size = pdata->ep[i].fifo_size;
1979 ep->nr_banks = pdata->ep[i].nr_banks;
1980 ep->index = pdata->ep[i].index;
1981 ep->can_dma = pdata->ep[i].can_dma;
1982 ep->can_isoc = pdata->ep[i].can_isoc;
1984 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1987 ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
1989 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
1991 goto err_request_irq;
1995 ret = device_add(&udc->gadget.dev);
1997 dev_dbg(&pdev->dev, "Could not add gadget: %d\n", ret);
1998 goto err_device_add;
2001 if (gpio_is_valid(pdata->vbus_pin)) {
2002 if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
2003 udc->vbus_pin = pdata->vbus_pin;
2004 udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
2006 ret = request_irq(gpio_to_irq(udc->vbus_pin),
2008 "atmel_usba_udc", udc);
2010 gpio_free(udc->vbus_pin);
2011 udc->vbus_pin = -ENODEV;
2012 dev_warn(&udc->pdev->dev,
2013 "failed to request vbus irq; "
2014 "assuming always on\n");
2016 disable_irq(gpio_to_irq(udc->vbus_pin));
2021 usba_init_debugfs(udc);
2022 for (i = 1; i < pdata->num_ep; i++)
2023 usba_ep_init_debugfs(udc, &usba_ep[i]);
2040 platform_set_drvdata(pdev, NULL);
2045 static int __exit usba_udc_remove(struct platform_device *pdev)
2047 struct usba_udc *udc;
2049 struct usba_platform_data *pdata = pdev->dev.platform_data;
2051 udc = platform_get_drvdata(pdev);
2053 for (i = 1; i < pdata->num_ep; i++)
2054 usba_ep_cleanup_debugfs(&usba_ep[i]);
2055 usba_cleanup_debugfs(udc);
2057 if (gpio_is_valid(udc->vbus_pin))
2058 gpio_free(udc->vbus_pin);
2060 free_irq(udc->irq, udc);
2067 device_unregister(&udc->gadget.dev);
2072 static struct platform_driver udc_driver = {
2073 .remove = __exit_p(usba_udc_remove),
2075 .name = "atmel_usba_udc",
2076 .owner = THIS_MODULE,
2080 static int __init udc_init(void)
2082 return platform_driver_probe(&udc_driver, usba_udc_probe);
2084 module_init(udc_init);
2086 static void __exit udc_exit(void)
2088 platform_driver_unregister(&udc_driver);
2090 module_exit(udc_exit);
2092 MODULE_DESCRIPTION("Atmel USBA UDC driver");
2093 MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
2094 MODULE_LICENSE("GPL");
2095 MODULE_ALIAS("platform:atmel_usba_udc");