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>
24 #include <linux/platform_data/atmel.h>
26 #include <linux/of_gpio.h>
30 #include "atmel_usba_udc.h"
32 #ifdef CONFIG_USB_GADGET_DEBUG_FS
33 #include <linux/debugfs.h>
34 #include <linux/uaccess.h>
36 static int queue_dbg_open(struct inode *inode, struct file *file)
38 struct usba_ep *ep = inode->i_private;
39 struct usba_request *req, *req_copy;
40 struct list_head *queue_data;
42 queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
45 INIT_LIST_HEAD(queue_data);
47 spin_lock_irq(&ep->udc->lock);
48 list_for_each_entry(req, &ep->queue, queue) {
49 req_copy = kmemdup(req, sizeof(*req_copy), GFP_ATOMIC);
52 list_add_tail(&req_copy->queue, queue_data);
54 spin_unlock_irq(&ep->udc->lock);
56 file->private_data = queue_data;
60 spin_unlock_irq(&ep->udc->lock);
61 list_for_each_entry_safe(req, req_copy, queue_data, queue) {
62 list_del(&req->queue);
70 * bbbbbbbb llllllll IZS sssss nnnn FDL\n\0
74 * I/i: interrupt/no interrupt
76 * S/s: short ok/short not ok
79 * F/f: submitted/not submitted to FIFO
80 * D/d: using/not using DMA
81 * L/l: last transaction/not last transaction
83 static ssize_t queue_dbg_read(struct file *file, char __user *buf,
84 size_t nbytes, loff_t *ppos)
86 struct list_head *queue = file->private_data;
87 struct usba_request *req, *tmp_req;
88 size_t len, remaining, actual = 0;
91 if (!access_ok(VERIFY_WRITE, buf, nbytes))
94 mutex_lock(&file_inode(file)->i_mutex);
95 list_for_each_entry_safe(req, tmp_req, queue, queue) {
96 len = snprintf(tmpbuf, sizeof(tmpbuf),
97 "%8p %08x %c%c%c %5d %c%c%c\n",
98 req->req.buf, req->req.length,
99 req->req.no_interrupt ? 'i' : 'I',
100 req->req.zero ? 'Z' : 'z',
101 req->req.short_not_ok ? 's' : 'S',
103 req->submitted ? 'F' : 'f',
104 req->using_dma ? 'D' : 'd',
105 req->last_transaction ? 'L' : 'l');
106 len = min(len, sizeof(tmpbuf));
110 list_del(&req->queue);
113 remaining = __copy_to_user(buf, tmpbuf, len);
114 actual += len - remaining;
121 mutex_unlock(&file_inode(file)->i_mutex);
126 static int queue_dbg_release(struct inode *inode, struct file *file)
128 struct list_head *queue_data = file->private_data;
129 struct usba_request *req, *tmp_req;
131 list_for_each_entry_safe(req, tmp_req, queue_data, queue) {
132 list_del(&req->queue);
139 static int regs_dbg_open(struct inode *inode, struct file *file)
141 struct usba_udc *udc;
146 mutex_lock(&inode->i_mutex);
147 udc = inode->i_private;
148 data = kmalloc(inode->i_size, GFP_KERNEL);
152 spin_lock_irq(&udc->lock);
153 for (i = 0; i < inode->i_size / 4; i++)
154 data[i] = __raw_readl(udc->regs + i * 4);
155 spin_unlock_irq(&udc->lock);
157 file->private_data = data;
161 mutex_unlock(&inode->i_mutex);
166 static ssize_t regs_dbg_read(struct file *file, char __user *buf,
167 size_t nbytes, loff_t *ppos)
169 struct inode *inode = file_inode(file);
172 mutex_lock(&inode->i_mutex);
173 ret = simple_read_from_buffer(buf, nbytes, ppos,
175 file_inode(file)->i_size);
176 mutex_unlock(&inode->i_mutex);
181 static int regs_dbg_release(struct inode *inode, struct file *file)
183 kfree(file->private_data);
187 const struct file_operations queue_dbg_fops = {
188 .owner = THIS_MODULE,
189 .open = queue_dbg_open,
191 .read = queue_dbg_read,
192 .release = queue_dbg_release,
195 const struct file_operations regs_dbg_fops = {
196 .owner = THIS_MODULE,
197 .open = regs_dbg_open,
198 .llseek = generic_file_llseek,
199 .read = regs_dbg_read,
200 .release = regs_dbg_release,
203 static void usba_ep_init_debugfs(struct usba_udc *udc,
206 struct dentry *ep_root;
208 ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root);
211 ep->debugfs_dir = ep_root;
213 ep->debugfs_queue = debugfs_create_file("queue", 0400, ep_root,
214 ep, &queue_dbg_fops);
215 if (!ep->debugfs_queue)
219 ep->debugfs_dma_status
220 = debugfs_create_u32("dma_status", 0400, ep_root,
221 &ep->last_dma_status);
222 if (!ep->debugfs_dma_status)
225 if (ep_is_control(ep)) {
227 = debugfs_create_u32("state", 0400, ep_root,
229 if (!ep->debugfs_state)
237 debugfs_remove(ep->debugfs_dma_status);
239 debugfs_remove(ep->debugfs_queue);
241 debugfs_remove(ep_root);
243 dev_err(&ep->udc->pdev->dev,
244 "failed to create debugfs directory for %s\n", ep->ep.name);
247 static void usba_ep_cleanup_debugfs(struct usba_ep *ep)
249 debugfs_remove(ep->debugfs_queue);
250 debugfs_remove(ep->debugfs_dma_status);
251 debugfs_remove(ep->debugfs_state);
252 debugfs_remove(ep->debugfs_dir);
253 ep->debugfs_dma_status = NULL;
254 ep->debugfs_dir = NULL;
257 static void usba_init_debugfs(struct usba_udc *udc)
259 struct dentry *root, *regs;
260 struct resource *regs_resource;
262 root = debugfs_create_dir(udc->gadget.name, NULL);
263 if (IS_ERR(root) || !root)
265 udc->debugfs_root = root;
267 regs = debugfs_create_file("regs", 0400, root, udc, ®s_dbg_fops);
271 regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
273 regs->d_inode->i_size = resource_size(regs_resource);
274 udc->debugfs_regs = regs;
276 usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
281 debugfs_remove(root);
283 udc->debugfs_root = NULL;
284 dev_err(&udc->pdev->dev, "debugfs is not available\n");
287 static void usba_cleanup_debugfs(struct usba_udc *udc)
289 usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0));
290 debugfs_remove(udc->debugfs_regs);
291 debugfs_remove(udc->debugfs_root);
292 udc->debugfs_regs = NULL;
293 udc->debugfs_root = NULL;
296 static inline void usba_ep_init_debugfs(struct usba_udc *udc,
302 static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
307 static inline void usba_init_debugfs(struct usba_udc *udc)
312 static inline void usba_cleanup_debugfs(struct usba_udc *udc)
318 static int vbus_is_present(struct usba_udc *udc)
320 if (gpio_is_valid(udc->vbus_pin))
321 return gpio_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
323 /* No Vbus detection: Assume always present */
327 #if defined(CONFIG_ARCH_AT91SAM9RL)
329 #include <linux/clk/at91_pmc.h>
331 static void toggle_bias(int is_on)
333 unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
336 at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
338 at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
343 static void toggle_bias(int is_on)
347 #endif /* CONFIG_ARCH_AT91SAM9RL */
349 static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
351 unsigned int transaction_len;
353 transaction_len = req->req.length - req->req.actual;
354 req->last_transaction = 1;
355 if (transaction_len > ep->ep.maxpacket) {
356 transaction_len = ep->ep.maxpacket;
357 req->last_transaction = 0;
358 } else if (transaction_len == ep->ep.maxpacket && req->req.zero)
359 req->last_transaction = 0;
361 DBG(DBG_QUEUE, "%s: submit_transaction, req %p (length %d)%s\n",
362 ep->ep.name, req, transaction_len,
363 req->last_transaction ? ", done" : "");
365 memcpy_toio(ep->fifo, req->req.buf + req->req.actual, transaction_len);
366 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
367 req->req.actual += transaction_len;
370 static void submit_request(struct usba_ep *ep, struct usba_request *req)
372 DBG(DBG_QUEUE, "%s: submit_request: req %p (length %d)\n",
373 ep->ep.name, req, req->req.length);
378 if (req->using_dma) {
379 if (req->req.length == 0) {
380 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
385 usba_ep_writel(ep, CTL_ENB, USBA_SHORT_PACKET);
387 usba_ep_writel(ep, CTL_DIS, USBA_SHORT_PACKET);
389 usba_dma_writel(ep, ADDRESS, req->req.dma);
390 usba_dma_writel(ep, CONTROL, req->ctrl);
392 next_fifo_transaction(ep, req);
393 if (req->last_transaction) {
394 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
395 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
397 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
398 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
403 static void submit_next_request(struct usba_ep *ep)
405 struct usba_request *req;
407 if (list_empty(&ep->queue)) {
408 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY | USBA_RX_BK_RDY);
412 req = list_entry(ep->queue.next, struct usba_request, queue);
414 submit_request(ep, req);
417 static void send_status(struct usba_udc *udc, struct usba_ep *ep)
419 ep->state = STATUS_STAGE_IN;
420 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
421 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
424 static void receive_data(struct usba_ep *ep)
426 struct usba_udc *udc = ep->udc;
427 struct usba_request *req;
428 unsigned long status;
429 unsigned int bytecount, nr_busy;
432 status = usba_ep_readl(ep, STA);
433 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
435 DBG(DBG_QUEUE, "receive data: nr_busy=%u\n", nr_busy);
437 while (nr_busy > 0) {
438 if (list_empty(&ep->queue)) {
439 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
442 req = list_entry(ep->queue.next,
443 struct usba_request, queue);
445 bytecount = USBA_BFEXT(BYTE_COUNT, status);
447 if (status & (1 << 31))
449 if (req->req.actual + bytecount >= req->req.length) {
451 bytecount = req->req.length - req->req.actual;
454 memcpy_fromio(req->req.buf + req->req.actual,
455 ep->fifo, bytecount);
456 req->req.actual += bytecount;
458 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
461 DBG(DBG_QUEUE, "%s: request done\n", ep->ep.name);
463 list_del_init(&req->queue);
464 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
465 spin_unlock(&udc->lock);
466 usb_gadget_giveback_request(&ep->ep, &req->req);
467 spin_lock(&udc->lock);
470 status = usba_ep_readl(ep, STA);
471 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
473 if (is_complete && ep_is_control(ep)) {
474 send_status(udc, ep);
481 request_complete(struct usba_ep *ep, struct usba_request *req, int status)
483 struct usba_udc *udc = ep->udc;
485 WARN_ON(!list_empty(&req->queue));
487 if (req->req.status == -EINPROGRESS)
488 req->req.status = status;
491 usb_gadget_unmap_request(&udc->gadget, &req->req, ep->is_in);
493 DBG(DBG_GADGET | DBG_REQ,
494 "%s: req %p complete: status %d, actual %u\n",
495 ep->ep.name, req, req->req.status, req->req.actual);
497 spin_unlock(&udc->lock);
498 usb_gadget_giveback_request(&ep->ep, &req->req);
499 spin_lock(&udc->lock);
503 request_complete_list(struct usba_ep *ep, struct list_head *list, int status)
505 struct usba_request *req, *tmp_req;
507 list_for_each_entry_safe(req, tmp_req, list, queue) {
508 list_del_init(&req->queue);
509 request_complete(ep, req, status);
514 usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
516 struct usba_ep *ep = to_usba_ep(_ep);
517 struct usba_udc *udc = ep->udc;
518 unsigned long flags, ept_cfg, maxpacket;
519 unsigned int nr_trans;
521 DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
523 maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
525 if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
527 || desc->bDescriptorType != USB_DT_ENDPOINT
529 || maxpacket > ep->fifo_size) {
530 DBG(DBG_ERR, "ep_enable: Invalid argument");
538 ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
540 /* LSB is bit 1, not 0 */
541 ept_cfg = USBA_BF(EPT_SIZE, fls(maxpacket - 1) - 3);
543 DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
544 ep->ep.name, ept_cfg, maxpacket);
546 if (usb_endpoint_dir_in(desc)) {
548 ept_cfg |= USBA_EPT_DIR_IN;
551 switch (usb_endpoint_type(desc)) {
552 case USB_ENDPOINT_XFER_CONTROL:
553 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
554 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
556 case USB_ENDPOINT_XFER_ISOC:
558 DBG(DBG_ERR, "ep_enable: %s is not isoc capable\n",
564 * Bits 11:12 specify number of _additional_
565 * transactions per microframe.
567 nr_trans = ((usb_endpoint_maxp(desc) >> 11) & 3) + 1;
572 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
575 * Do triple-buffering on high-bandwidth iso endpoints.
577 if (nr_trans > 1 && ep->nr_banks == 3)
578 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_TRIPLE);
580 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
581 ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
583 case USB_ENDPOINT_XFER_BULK:
584 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
585 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
587 case USB_ENDPOINT_XFER_INT:
588 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
589 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
593 spin_lock_irqsave(&ep->udc->lock, flags);
596 ep->ep.maxpacket = maxpacket;
598 usba_ep_writel(ep, CFG, ept_cfg);
599 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
604 usba_writel(udc, INT_ENB,
605 (usba_readl(udc, INT_ENB)
606 | USBA_BF(EPT_INT, 1 << ep->index)
607 | USBA_BF(DMA_INT, 1 << ep->index)));
608 ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
609 usba_ep_writel(ep, CTL_ENB, ctrl);
611 usba_writel(udc, INT_ENB,
612 (usba_readl(udc, INT_ENB)
613 | USBA_BF(EPT_INT, 1 << ep->index)));
616 spin_unlock_irqrestore(&udc->lock, flags);
618 DBG(DBG_HW, "EPT_CFG%d after init: %#08lx\n", ep->index,
619 (unsigned long)usba_ep_readl(ep, CFG));
620 DBG(DBG_HW, "INT_ENB after init: %#08lx\n",
621 (unsigned long)usba_readl(udc, INT_ENB));
626 static int usba_ep_disable(struct usb_ep *_ep)
628 struct usba_ep *ep = to_usba_ep(_ep);
629 struct usba_udc *udc = ep->udc;
633 DBG(DBG_GADGET, "ep_disable: %s\n", ep->ep.name);
635 spin_lock_irqsave(&udc->lock, flags);
638 spin_unlock_irqrestore(&udc->lock, flags);
639 /* REVISIT because this driver disables endpoints in
640 * reset_all_endpoints() before calling disconnect(),
641 * most gadget drivers would trigger this non-error ...
643 if (udc->gadget.speed != USB_SPEED_UNKNOWN)
644 DBG(DBG_ERR, "ep_disable: %s not enabled\n",
650 list_splice_init(&ep->queue, &req_list);
652 usba_dma_writel(ep, CONTROL, 0);
653 usba_dma_writel(ep, ADDRESS, 0);
654 usba_dma_readl(ep, STATUS);
656 usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
657 usba_writel(udc, INT_ENB,
658 usba_readl(udc, INT_ENB)
659 & ~USBA_BF(EPT_INT, 1 << ep->index));
661 request_complete_list(ep, &req_list, -ESHUTDOWN);
663 spin_unlock_irqrestore(&udc->lock, flags);
668 static struct usb_request *
669 usba_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
671 struct usba_request *req;
673 DBG(DBG_GADGET, "ep_alloc_request: %p, 0x%x\n", _ep, gfp_flags);
675 req = kzalloc(sizeof(*req), gfp_flags);
679 INIT_LIST_HEAD(&req->queue);
685 usba_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
687 struct usba_request *req = to_usba_req(_req);
689 DBG(DBG_GADGET, "ep_free_request: %p, %p\n", _ep, _req);
694 static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
695 struct usba_request *req, gfp_t gfp_flags)
700 DBG(DBG_DMA, "%s: req l/%u d/%08x %c%c%c\n",
701 ep->ep.name, req->req.length, req->req.dma,
702 req->req.zero ? 'Z' : 'z',
703 req->req.short_not_ok ? 'S' : 's',
704 req->req.no_interrupt ? 'I' : 'i');
706 if (req->req.length > 0x10000) {
707 /* Lengths from 0 to 65536 (inclusive) are supported */
708 DBG(DBG_ERR, "invalid request length %u\n", req->req.length);
712 ret = usb_gadget_map_request(&udc->gadget, &req->req, ep->is_in);
717 req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
718 | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
719 | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
722 req->ctrl |= USBA_DMA_END_BUF_EN;
725 * Add this request to the queue and submit for DMA if
726 * possible. Check if we're still alive first -- we may have
727 * received a reset since last time we checked.
730 spin_lock_irqsave(&udc->lock, flags);
732 if (list_empty(&ep->queue))
733 submit_request(ep, req);
735 list_add_tail(&req->queue, &ep->queue);
738 spin_unlock_irqrestore(&udc->lock, flags);
744 usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
746 struct usba_request *req = to_usba_req(_req);
747 struct usba_ep *ep = to_usba_ep(_ep);
748 struct usba_udc *udc = ep->udc;
752 DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
753 ep->ep.name, req, _req->length);
755 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN ||
761 req->last_transaction = 0;
763 _req->status = -EINPROGRESS;
767 return queue_dma(udc, ep, req, gfp_flags);
769 /* May have received a reset since last time we checked */
771 spin_lock_irqsave(&udc->lock, flags);
773 list_add_tail(&req->queue, &ep->queue);
775 if ((!ep_is_control(ep) && ep->is_in) ||
777 && (ep->state == DATA_STAGE_IN
778 || ep->state == STATUS_STAGE_IN)))
779 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
781 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
784 spin_unlock_irqrestore(&udc->lock, flags);
790 usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
792 req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
795 static int stop_dma(struct usba_ep *ep, u32 *pstatus)
797 unsigned int timeout;
801 * Stop the DMA controller. When writing both CH_EN
802 * and LINK to 0, the other bits are not affected.
804 usba_dma_writel(ep, CONTROL, 0);
806 /* Wait for the FIFO to empty */
807 for (timeout = 40; timeout; --timeout) {
808 status = usba_dma_readl(ep, STATUS);
809 if (!(status & USBA_DMA_CH_EN))
818 dev_err(&ep->udc->pdev->dev,
819 "%s: timed out waiting for DMA FIFO to empty\n",
827 static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
829 struct usba_ep *ep = to_usba_ep(_ep);
830 struct usba_udc *udc = ep->udc;
831 struct usba_request *req = to_usba_req(_req);
835 DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
838 spin_lock_irqsave(&udc->lock, flags);
840 if (req->using_dma) {
842 * If this request is currently being transferred,
843 * stop the DMA controller and reset the FIFO.
845 if (ep->queue.next == &req->queue) {
846 status = usba_dma_readl(ep, STATUS);
847 if (status & USBA_DMA_CH_EN)
848 stop_dma(ep, &status);
850 #ifdef CONFIG_USB_GADGET_DEBUG_FS
851 ep->last_dma_status = status;
854 usba_writel(udc, EPT_RST, 1 << ep->index);
856 usba_update_req(ep, req, status);
861 * Errors should stop the queue from advancing until the
862 * completion function returns.
864 list_del_init(&req->queue);
866 request_complete(ep, req, -ECONNRESET);
868 /* Process the next request if any */
869 submit_next_request(ep);
870 spin_unlock_irqrestore(&udc->lock, flags);
875 static int usba_ep_set_halt(struct usb_ep *_ep, int value)
877 struct usba_ep *ep = to_usba_ep(_ep);
878 struct usba_udc *udc = ep->udc;
882 DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
883 value ? "set" : "clear");
886 DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
891 DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
896 spin_lock_irqsave(&udc->lock, flags);
899 * We can't halt IN endpoints while there are still data to be
902 if (!list_empty(&ep->queue)
903 || ((value && ep->is_in && (usba_ep_readl(ep, STA)
904 & USBA_BF(BUSY_BANKS, -1L))))) {
908 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
910 usba_ep_writel(ep, CLR_STA,
911 USBA_FORCE_STALL | USBA_TOGGLE_CLR);
912 usba_ep_readl(ep, STA);
915 spin_unlock_irqrestore(&udc->lock, flags);
920 static int usba_ep_fifo_status(struct usb_ep *_ep)
922 struct usba_ep *ep = to_usba_ep(_ep);
924 return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
927 static void usba_ep_fifo_flush(struct usb_ep *_ep)
929 struct usba_ep *ep = to_usba_ep(_ep);
930 struct usba_udc *udc = ep->udc;
932 usba_writel(udc, EPT_RST, 1 << ep->index);
935 static const struct usb_ep_ops usba_ep_ops = {
936 .enable = usba_ep_enable,
937 .disable = usba_ep_disable,
938 .alloc_request = usba_ep_alloc_request,
939 .free_request = usba_ep_free_request,
940 .queue = usba_ep_queue,
941 .dequeue = usba_ep_dequeue,
942 .set_halt = usba_ep_set_halt,
943 .fifo_status = usba_ep_fifo_status,
944 .fifo_flush = usba_ep_fifo_flush,
947 static int usba_udc_get_frame(struct usb_gadget *gadget)
949 struct usba_udc *udc = to_usba_udc(gadget);
951 return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
954 static int usba_udc_wakeup(struct usb_gadget *gadget)
956 struct usba_udc *udc = to_usba_udc(gadget);
961 spin_lock_irqsave(&udc->lock, flags);
962 if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
963 ctrl = usba_readl(udc, CTRL);
964 usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
967 spin_unlock_irqrestore(&udc->lock, flags);
973 usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
975 struct usba_udc *udc = to_usba_udc(gadget);
978 spin_lock_irqsave(&udc->lock, flags);
980 udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
982 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
983 spin_unlock_irqrestore(&udc->lock, flags);
988 static int atmel_usba_start(struct usb_gadget *gadget,
989 struct usb_gadget_driver *driver);
990 static int atmel_usba_stop(struct usb_gadget *gadget);
992 static const struct usb_gadget_ops usba_udc_ops = {
993 .get_frame = usba_udc_get_frame,
994 .wakeup = usba_udc_wakeup,
995 .set_selfpowered = usba_udc_set_selfpowered,
996 .udc_start = atmel_usba_start,
997 .udc_stop = atmel_usba_stop,
1000 static struct usb_endpoint_descriptor usba_ep0_desc = {
1001 .bLength = USB_DT_ENDPOINT_SIZE,
1002 .bDescriptorType = USB_DT_ENDPOINT,
1003 .bEndpointAddress = 0,
1004 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1005 .wMaxPacketSize = cpu_to_le16(64),
1006 /* FIXME: I have no idea what to put here */
1010 static struct usb_gadget usba_gadget_template = {
1011 .ops = &usba_udc_ops,
1012 .max_speed = USB_SPEED_HIGH,
1013 .name = "atmel_usba_udc",
1017 * Called with interrupts disabled and udc->lock held.
1019 static void reset_all_endpoints(struct usba_udc *udc)
1022 struct usba_request *req, *tmp_req;
1024 usba_writel(udc, EPT_RST, ~0UL);
1026 ep = to_usba_ep(udc->gadget.ep0);
1027 list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1028 list_del_init(&req->queue);
1029 request_complete(ep, req, -ECONNRESET);
1032 /* NOTE: normally, the next call to the gadget driver is in
1033 * charge of disabling endpoints... usually disconnect().
1034 * The exception would be entering a high speed test mode.
1036 * FIXME remove this code ... and retest thoroughly.
1038 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1040 spin_unlock(&udc->lock);
1041 usba_ep_disable(&ep->ep);
1042 spin_lock(&udc->lock);
1047 static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1051 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1052 return to_usba_ep(udc->gadget.ep0);
1054 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1055 u8 bEndpointAddress;
1059 bEndpointAddress = ep->ep.desc->bEndpointAddress;
1060 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1062 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1063 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1070 /* Called with interrupts disabled and udc->lock held */
1071 static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1073 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1074 ep->state = WAIT_FOR_SETUP;
1077 static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1079 if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1084 static inline void set_address(struct usba_udc *udc, unsigned int addr)
1088 DBG(DBG_BUS, "setting address %u...\n", addr);
1089 regval = usba_readl(udc, CTRL);
1090 regval = USBA_BFINS(DEV_ADDR, addr, regval);
1091 usba_writel(udc, CTRL, regval);
1094 static int do_test_mode(struct usba_udc *udc)
1096 static const char test_packet_buffer[] = {
1098 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1100 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1102 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1103 /* JJJJJJJKKKKKKK * 8 */
1104 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1105 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1107 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1108 /* {JKKKKKKK * 10}, JK */
1109 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1112 struct device *dev = &udc->pdev->dev;
1115 test_mode = udc->test_mode;
1117 /* Start from a clean slate */
1118 reset_all_endpoints(udc);
1120 switch (test_mode) {
1123 usba_writel(udc, TST, USBA_TST_J_MODE);
1124 dev_info(dev, "Entering Test_J mode...\n");
1128 usba_writel(udc, TST, USBA_TST_K_MODE);
1129 dev_info(dev, "Entering Test_K mode...\n");
1133 * Test_SE0_NAK: Force high-speed mode and set up ep0
1134 * for Bulk IN transfers
1136 ep = &udc->usba_ep[0];
1137 usba_writel(udc, TST,
1138 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1139 usba_ep_writel(ep, CFG,
1140 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1142 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1143 | USBA_BF(BK_NUMBER, 1));
1144 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1145 set_protocol_stall(udc, ep);
1146 dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1148 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1149 dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1154 ep = &udc->usba_ep[0];
1155 usba_ep_writel(ep, CFG,
1156 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1158 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1159 | USBA_BF(BK_NUMBER, 1));
1160 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1161 set_protocol_stall(udc, ep);
1162 dev_err(dev, "Test_Packet: ep0 not mapped\n");
1164 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1165 usba_writel(udc, TST, USBA_TST_PKT_MODE);
1166 memcpy_toio(ep->fifo, test_packet_buffer,
1167 sizeof(test_packet_buffer));
1168 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1169 dev_info(dev, "Entering Test_Packet mode...\n");
1173 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1180 /* Avoid overly long expressions */
1181 static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1183 if (crq->wValue == cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1188 static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1190 if (crq->wValue == cpu_to_le16(USB_DEVICE_TEST_MODE))
1195 static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1197 if (crq->wValue == cpu_to_le16(USB_ENDPOINT_HALT))
1202 static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1203 struct usb_ctrlrequest *crq)
1207 switch (crq->bRequest) {
1208 case USB_REQ_GET_STATUS: {
1211 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1212 status = cpu_to_le16(udc->devstatus);
1213 } else if (crq->bRequestType
1214 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1215 status = cpu_to_le16(0);
1216 } else if (crq->bRequestType
1217 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1218 struct usba_ep *target;
1220 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1225 if (is_stalled(udc, target))
1226 status |= cpu_to_le16(1);
1230 /* Write directly to the FIFO. No queueing is done. */
1231 if (crq->wLength != cpu_to_le16(sizeof(status)))
1233 ep->state = DATA_STAGE_IN;
1234 __raw_writew(status, ep->fifo);
1235 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1239 case USB_REQ_CLEAR_FEATURE: {
1240 if (crq->bRequestType == USB_RECIP_DEVICE) {
1241 if (feature_is_dev_remote_wakeup(crq))
1243 &= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
1245 /* Can't CLEAR_FEATURE TEST_MODE */
1247 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1248 struct usba_ep *target;
1250 if (crq->wLength != cpu_to_le16(0)
1251 || !feature_is_ep_halt(crq))
1253 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1257 usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1258 if (target->index != 0)
1259 usba_ep_writel(target, CLR_STA,
1265 send_status(udc, ep);
1269 case USB_REQ_SET_FEATURE: {
1270 if (crq->bRequestType == USB_RECIP_DEVICE) {
1271 if (feature_is_dev_test_mode(crq)) {
1272 send_status(udc, ep);
1273 ep->state = STATUS_STAGE_TEST;
1274 udc->test_mode = le16_to_cpu(crq->wIndex);
1276 } else if (feature_is_dev_remote_wakeup(crq)) {
1277 udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
1281 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1282 struct usba_ep *target;
1284 if (crq->wLength != cpu_to_le16(0)
1285 || !feature_is_ep_halt(crq))
1288 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1292 usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1296 send_status(udc, ep);
1300 case USB_REQ_SET_ADDRESS:
1301 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1304 set_address(udc, le16_to_cpu(crq->wValue));
1305 send_status(udc, ep);
1306 ep->state = STATUS_STAGE_ADDR;
1311 spin_unlock(&udc->lock);
1312 retval = udc->driver->setup(&udc->gadget, crq);
1313 spin_lock(&udc->lock);
1319 pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1320 "halting endpoint...\n",
1321 ep->ep.name, crq->bRequestType, crq->bRequest,
1322 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1323 le16_to_cpu(crq->wLength));
1324 set_protocol_stall(udc, ep);
1328 static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1330 struct usba_request *req;
1335 epstatus = usba_ep_readl(ep, STA);
1336 epctrl = usba_ep_readl(ep, CTL);
1338 DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1339 ep->ep.name, ep->state, epstatus, epctrl);
1342 if (!list_empty(&ep->queue))
1343 req = list_entry(ep->queue.next,
1344 struct usba_request, queue);
1346 if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1348 next_fifo_transaction(ep, req);
1350 submit_request(ep, req);
1352 if (req->last_transaction) {
1353 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1354 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1358 if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1359 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1361 switch (ep->state) {
1363 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1364 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1365 ep->state = STATUS_STAGE_OUT;
1367 case STATUS_STAGE_ADDR:
1368 /* Activate our new address */
1369 usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1371 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1372 ep->state = WAIT_FOR_SETUP;
1374 case STATUS_STAGE_IN:
1376 list_del_init(&req->queue);
1377 request_complete(ep, req, 0);
1378 submit_next_request(ep);
1380 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1381 ep->state = WAIT_FOR_SETUP;
1383 case STATUS_STAGE_TEST:
1384 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1385 ep->state = WAIT_FOR_SETUP;
1386 if (do_test_mode(udc))
1387 set_protocol_stall(udc, ep);
1390 pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
1391 "halting endpoint...\n",
1392 ep->ep.name, ep->state);
1393 set_protocol_stall(udc, ep);
1399 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1400 switch (ep->state) {
1401 case STATUS_STAGE_OUT:
1402 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1403 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1406 list_del_init(&req->queue);
1407 request_complete(ep, req, 0);
1409 ep->state = WAIT_FOR_SETUP;
1412 case DATA_STAGE_OUT:
1417 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1418 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1419 pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
1420 "halting endpoint...\n",
1421 ep->ep.name, ep->state);
1422 set_protocol_stall(udc, ep);
1428 if (epstatus & USBA_RX_SETUP) {
1430 struct usb_ctrlrequest crq;
1431 unsigned long data[2];
1433 unsigned int pkt_len;
1436 if (ep->state != WAIT_FOR_SETUP) {
1438 * Didn't expect a SETUP packet at this
1439 * point. Clean up any pending requests (which
1440 * may be successful).
1442 int status = -EPROTO;
1445 * RXRDY and TXCOMP are dropped when SETUP
1446 * packets arrive. Just pretend we received
1447 * the status packet.
1449 if (ep->state == STATUS_STAGE_OUT
1450 || ep->state == STATUS_STAGE_IN) {
1451 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1456 list_del_init(&req->queue);
1457 request_complete(ep, req, status);
1461 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1462 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1463 if (pkt_len != sizeof(crq)) {
1464 pr_warning("udc: Invalid packet length %u "
1465 "(expected %zu)\n", pkt_len, sizeof(crq));
1466 set_protocol_stall(udc, ep);
1470 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1471 memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
1473 /* Free up one bank in the FIFO so that we can
1474 * generate or receive a reply right away. */
1475 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1477 /* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
1478 ep->state, crq.crq.bRequestType,
1479 crq.crq.bRequest); */
1481 if (crq.crq.bRequestType & USB_DIR_IN) {
1483 * The USB 2.0 spec states that "if wLength is
1484 * zero, there is no data transfer phase."
1485 * However, testusb #14 seems to actually
1486 * expect a data phase even if wLength = 0...
1488 ep->state = DATA_STAGE_IN;
1490 if (crq.crq.wLength != cpu_to_le16(0))
1491 ep->state = DATA_STAGE_OUT;
1493 ep->state = STATUS_STAGE_IN;
1498 ret = handle_ep0_setup(udc, ep, &crq.crq);
1500 spin_unlock(&udc->lock);
1501 ret = udc->driver->setup(&udc->gadget, &crq.crq);
1502 spin_lock(&udc->lock);
1505 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1506 crq.crq.bRequestType, crq.crq.bRequest,
1507 le16_to_cpu(crq.crq.wLength), ep->state, ret);
1510 /* Let the host know that we failed */
1511 set_protocol_stall(udc, ep);
1516 static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1518 struct usba_request *req;
1522 epstatus = usba_ep_readl(ep, STA);
1523 epctrl = usba_ep_readl(ep, CTL);
1525 DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1527 while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1528 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1530 if (list_empty(&ep->queue)) {
1531 dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1532 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1536 req = list_entry(ep->queue.next, struct usba_request, queue);
1538 if (req->using_dma) {
1539 /* Send a zero-length packet */
1540 usba_ep_writel(ep, SET_STA,
1542 usba_ep_writel(ep, CTL_DIS,
1544 list_del_init(&req->queue);
1545 submit_next_request(ep);
1546 request_complete(ep, req, 0);
1549 next_fifo_transaction(ep, req);
1551 submit_request(ep, req);
1553 if (req->last_transaction) {
1554 list_del_init(&req->queue);
1555 submit_next_request(ep);
1556 request_complete(ep, req, 0);
1560 epstatus = usba_ep_readl(ep, STA);
1561 epctrl = usba_ep_readl(ep, CTL);
1563 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1564 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1566 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1570 static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1572 struct usba_request *req;
1573 u32 status, control, pending;
1575 status = usba_dma_readl(ep, STATUS);
1576 control = usba_dma_readl(ep, CONTROL);
1577 #ifdef CONFIG_USB_GADGET_DEBUG_FS
1578 ep->last_dma_status = status;
1580 pending = status & control;
1581 DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1583 if (status & USBA_DMA_CH_EN) {
1584 dev_err(&udc->pdev->dev,
1585 "DMA_CH_EN is set after transfer is finished!\n");
1586 dev_err(&udc->pdev->dev,
1587 "status=%#08x, pending=%#08x, control=%#08x\n",
1588 status, pending, control);
1591 * try to pretend nothing happened. We might have to
1592 * do something here...
1596 if (list_empty(&ep->queue))
1597 /* Might happen if a reset comes along at the right moment */
1600 if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1601 req = list_entry(ep->queue.next, struct usba_request, queue);
1602 usba_update_req(ep, req, status);
1604 list_del_init(&req->queue);
1605 submit_next_request(ep);
1606 request_complete(ep, req, 0);
1610 static irqreturn_t usba_udc_irq(int irq, void *devid)
1612 struct usba_udc *udc = devid;
1617 spin_lock(&udc->lock);
1619 status = usba_readl(udc, INT_STA);
1620 DBG(DBG_INT, "irq, status=%#08x\n", status);
1622 if (status & USBA_DET_SUSPEND) {
1624 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
1625 DBG(DBG_BUS, "Suspend detected\n");
1626 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1627 && udc->driver && udc->driver->suspend) {
1628 spin_unlock(&udc->lock);
1629 udc->driver->suspend(&udc->gadget);
1630 spin_lock(&udc->lock);
1634 if (status & USBA_WAKE_UP) {
1636 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1637 DBG(DBG_BUS, "Wake Up CPU detected\n");
1640 if (status & USBA_END_OF_RESUME) {
1641 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1642 DBG(DBG_BUS, "Resume detected\n");
1643 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1644 && udc->driver && udc->driver->resume) {
1645 spin_unlock(&udc->lock);
1646 udc->driver->resume(&udc->gadget);
1647 spin_lock(&udc->lock);
1651 dma_status = USBA_BFEXT(DMA_INT, status);
1655 for (i = 1; i <= USBA_NR_DMAS; i++)
1656 if (dma_status & (1 << i))
1657 usba_dma_irq(udc, &udc->usba_ep[i]);
1660 ep_status = USBA_BFEXT(EPT_INT, status);
1664 for (i = 0; i < udc->num_ep; i++)
1665 if (ep_status & (1 << i)) {
1666 if (ep_is_control(&udc->usba_ep[i]))
1667 usba_control_irq(udc, &udc->usba_ep[i]);
1669 usba_ep_irq(udc, &udc->usba_ep[i]);
1673 if (status & USBA_END_OF_RESET) {
1674 struct usba_ep *ep0;
1676 usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
1677 reset_all_endpoints(udc);
1679 if (udc->gadget.speed != USB_SPEED_UNKNOWN && udc->driver) {
1680 udc->gadget.speed = USB_SPEED_UNKNOWN;
1681 spin_unlock(&udc->lock);
1682 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1683 spin_lock(&udc->lock);
1686 if (status & USBA_HIGH_SPEED)
1687 udc->gadget.speed = USB_SPEED_HIGH;
1689 udc->gadget.speed = USB_SPEED_FULL;
1690 DBG(DBG_BUS, "%s bus reset detected\n",
1691 usb_speed_string(udc->gadget.speed));
1693 ep0 = &udc->usba_ep[0];
1694 ep0->ep.desc = &usba_ep0_desc;
1695 ep0->state = WAIT_FOR_SETUP;
1696 usba_ep_writel(ep0, CFG,
1697 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1698 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1699 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1700 usba_ep_writel(ep0, CTL_ENB,
1701 USBA_EPT_ENABLE | USBA_RX_SETUP);
1702 usba_writel(udc, INT_ENB,
1703 (usba_readl(udc, INT_ENB)
1704 | USBA_BF(EPT_INT, 1)
1706 | USBA_END_OF_RESUME));
1709 * Unclear why we hit this irregularly, e.g. in usbtest,
1710 * but it's clearly harmless...
1712 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1713 dev_dbg(&udc->pdev->dev,
1714 "ODD: EP0 configuration is invalid!\n");
1717 spin_unlock(&udc->lock);
1722 static irqreturn_t usba_vbus_irq(int irq, void *devid)
1724 struct usba_udc *udc = devid;
1730 spin_lock(&udc->lock);
1732 /* May happen if Vbus pin toggles during probe() */
1736 vbus = vbus_is_present(udc);
1737 if (vbus != udc->vbus_prev) {
1740 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1741 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1743 udc->gadget.speed = USB_SPEED_UNKNOWN;
1744 reset_all_endpoints(udc);
1746 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1747 if (udc->driver->disconnect) {
1748 spin_unlock(&udc->lock);
1749 udc->driver->disconnect(&udc->gadget);
1750 spin_lock(&udc->lock);
1753 udc->vbus_prev = vbus;
1757 spin_unlock(&udc->lock);
1762 static int atmel_usba_start(struct usb_gadget *gadget,
1763 struct usb_gadget_driver *driver)
1766 struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
1767 unsigned long flags;
1769 spin_lock_irqsave(&udc->lock, flags);
1771 udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
1772 udc->driver = driver;
1773 spin_unlock_irqrestore(&udc->lock, flags);
1775 ret = clk_prepare_enable(udc->pclk);
1778 ret = clk_prepare_enable(udc->hclk);
1780 clk_disable_unprepare(udc->pclk);
1785 if (gpio_is_valid(udc->vbus_pin))
1786 enable_irq(gpio_to_irq(udc->vbus_pin));
1788 /* If Vbus is present, enable the controller and wait for reset */
1789 spin_lock_irqsave(&udc->lock, flags);
1790 if (vbus_is_present(udc) && udc->vbus_prev == 0) {
1792 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1793 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1795 spin_unlock_irqrestore(&udc->lock, flags);
1800 static int atmel_usba_stop(struct usb_gadget *gadget)
1802 struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
1803 unsigned long flags;
1805 if (gpio_is_valid(udc->vbus_pin))
1806 disable_irq(gpio_to_irq(udc->vbus_pin));
1808 spin_lock_irqsave(&udc->lock, flags);
1809 udc->gadget.speed = USB_SPEED_UNKNOWN;
1810 reset_all_endpoints(udc);
1811 spin_unlock_irqrestore(&udc->lock, flags);
1813 /* This will also disable the DP pullup */
1815 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1817 clk_disable_unprepare(udc->hclk);
1818 clk_disable_unprepare(udc->pclk);
1826 static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
1827 struct usba_udc *udc)
1831 enum of_gpio_flags flags;
1832 struct device_node *np = pdev->dev.of_node;
1833 struct device_node *pp;
1835 struct usba_ep *eps, *ep;
1839 udc->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0,
1841 udc->vbus_pin_inverted = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
1844 while ((pp = of_get_next_child(np, pp)))
1847 eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * udc->num_ep,
1850 return ERR_PTR(-ENOMEM);
1852 udc->gadget.ep0 = &eps[0].ep;
1854 INIT_LIST_HEAD(&eps[0].ep.ep_list);
1858 while ((pp = of_get_next_child(np, pp))) {
1861 ret = of_property_read_u32(pp, "reg", &val);
1863 dev_err(&pdev->dev, "of_probe: reg error(%d)\n", ret);
1868 ret = of_property_read_u32(pp, "atmel,fifo-size", &val);
1870 dev_err(&pdev->dev, "of_probe: fifo-size error(%d)\n", ret);
1873 ep->fifo_size = val;
1875 ret = of_property_read_u32(pp, "atmel,nb-banks", &val);
1877 dev_err(&pdev->dev, "of_probe: nb-banks error(%d)\n", ret);
1882 ep->can_dma = of_property_read_bool(pp, "atmel,can-dma");
1883 ep->can_isoc = of_property_read_bool(pp, "atmel,can-isoc");
1885 ret = of_property_read_string(pp, "name", &name);
1888 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1889 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1890 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1891 ep->ep.ops = &usba_ep_ops;
1892 usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
1894 INIT_LIST_HEAD(&ep->queue);
1897 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1903 dev_err(&pdev->dev, "of_probe: no endpoint specified\n");
1910 return ERR_PTR(ret);
1913 static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
1914 struct usba_udc *udc)
1916 return ERR_PTR(-ENOSYS);
1920 static struct usba_ep * usba_udc_pdata(struct platform_device *pdev,
1921 struct usba_udc *udc)
1923 struct usba_platform_data *pdata = dev_get_platdata(&pdev->dev);
1924 struct usba_ep *eps;
1928 return ERR_PTR(-ENXIO);
1930 eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * pdata->num_ep,
1933 return ERR_PTR(-ENOMEM);
1935 udc->gadget.ep0 = &eps[0].ep;
1937 udc->vbus_pin = pdata->vbus_pin;
1938 udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
1939 udc->num_ep = pdata->num_ep;
1941 INIT_LIST_HEAD(&eps[0].ep.ep_list);
1943 for (i = 0; i < pdata->num_ep; i++) {
1944 struct usba_ep *ep = &eps[i];
1946 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1947 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1948 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1949 ep->ep.ops = &usba_ep_ops;
1950 ep->ep.name = pdata->ep[i].name;
1951 ep->fifo_size = pdata->ep[i].fifo_size;
1952 usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
1954 INIT_LIST_HEAD(&ep->queue);
1955 ep->nr_banks = pdata->ep[i].nr_banks;
1956 ep->index = pdata->ep[i].index;
1957 ep->can_dma = pdata->ep[i].can_dma;
1958 ep->can_isoc = pdata->ep[i].can_isoc;
1961 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1967 static int usba_udc_probe(struct platform_device *pdev)
1969 struct resource *regs, *fifo;
1970 struct clk *pclk, *hclk;
1971 struct usba_udc *udc;
1974 udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
1978 udc->gadget = usba_gadget_template;
1979 INIT_LIST_HEAD(&udc->gadget.ep_list);
1981 regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
1982 fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
1986 irq = platform_get_irq(pdev, 0);
1990 pclk = devm_clk_get(&pdev->dev, "pclk");
1992 return PTR_ERR(pclk);
1993 hclk = devm_clk_get(&pdev->dev, "hclk");
1995 return PTR_ERR(hclk);
1997 spin_lock_init(&udc->lock);
2001 udc->vbus_pin = -ENODEV;
2004 udc->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
2006 dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
2009 dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
2010 (unsigned long)regs->start, udc->regs);
2011 udc->fifo = devm_ioremap(&pdev->dev, fifo->start, resource_size(fifo));
2013 dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
2016 dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
2017 (unsigned long)fifo->start, udc->fifo);
2019 platform_set_drvdata(pdev, udc);
2021 /* Make sure we start from a clean slate */
2022 ret = clk_prepare_enable(pclk);
2024 dev_err(&pdev->dev, "Unable to enable pclk, aborting.\n");
2028 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
2029 clk_disable_unprepare(pclk);
2031 if (pdev->dev.of_node)
2032 udc->usba_ep = atmel_udc_of_init(pdev, udc);
2034 udc->usba_ep = usba_udc_pdata(pdev, udc);
2036 if (IS_ERR(udc->usba_ep))
2037 return PTR_ERR(udc->usba_ep);
2039 ret = devm_request_irq(&pdev->dev, irq, usba_udc_irq, 0,
2040 "atmel_usba_udc", udc);
2042 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
2048 if (gpio_is_valid(udc->vbus_pin)) {
2049 if (!devm_gpio_request(&pdev->dev, udc->vbus_pin, "atmel_usba_udc")) {
2050 ret = devm_request_irq(&pdev->dev,
2051 gpio_to_irq(udc->vbus_pin),
2053 "atmel_usba_udc", udc);
2055 udc->vbus_pin = -ENODEV;
2056 dev_warn(&udc->pdev->dev,
2057 "failed to request vbus irq; "
2058 "assuming always on\n");
2060 disable_irq(gpio_to_irq(udc->vbus_pin));
2063 /* gpio_request fail so use -EINVAL for gpio_is_valid */
2064 udc->vbus_pin = -EINVAL;
2068 ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
2072 usba_init_debugfs(udc);
2073 for (i = 1; i < udc->num_ep; i++)
2074 usba_ep_init_debugfs(udc, &udc->usba_ep[i]);
2079 static int __exit usba_udc_remove(struct platform_device *pdev)
2081 struct usba_udc *udc;
2084 udc = platform_get_drvdata(pdev);
2086 usb_del_gadget_udc(&udc->gadget);
2088 for (i = 1; i < udc->num_ep; i++)
2089 usba_ep_cleanup_debugfs(&udc->usba_ep[i]);
2090 usba_cleanup_debugfs(udc);
2095 #if defined(CONFIG_OF)
2096 static const struct of_device_id atmel_udc_dt_ids[] = {
2097 { .compatible = "atmel,at91sam9rl-udc" },
2101 MODULE_DEVICE_TABLE(of, atmel_udc_dt_ids);
2104 static struct platform_driver udc_driver = {
2105 .remove = __exit_p(usba_udc_remove),
2107 .name = "atmel_usba_udc",
2108 .owner = THIS_MODULE,
2109 .of_match_table = of_match_ptr(atmel_udc_dt_ids),
2113 module_platform_driver_probe(udc_driver, usba_udc_probe);
2115 MODULE_DESCRIPTION("Atmel USBA UDC driver");
2116 MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
2117 MODULE_LICENSE("GPL");
2118 MODULE_ALIAS("platform:atmel_usba_udc");