1 // SPDX-License-Identifier: GPL-2.0+
3  * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget
5  * dev.c - Individual device/gadget management (ie, a port = a gadget)
25 #include <linux/dma-mapping.h>
33 	u32 istat = readl(d->regs + AST_VHUB_DEV_ISR);  in ast_vhub_dev_irq()
35 	writel(istat, d->regs + AST_VHUB_DEV_ISR);  in ast_vhub_dev_irq()
38 		ast_vhub_ep0_handle_ack(&d->ep0, true);  in ast_vhub_dev_irq()
40 		ast_vhub_ep0_handle_ack(&d->ep0, false);  in ast_vhub_dev_irq()
42 		ast_vhub_ep0_handle_setup(&d->ep0);  in ast_vhub_dev_irq()
49 	if (d->enabled)  in ast_vhub_dev_enable()
60 	if (d->gadget.speed == USB_SPEED_HIGH)  in ast_vhub_dev_enable()
62 	writel(reg, d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_enable()
65 	hmsk = VHUB_IRQ_DEVICE1 << d->index;  in ast_vhub_dev_enable()
66 	reg = readl(d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_enable()
68 	writel(reg, d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_enable()
71 	writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA);  in ast_vhub_dev_enable()
74 	for (i = 0; i < d->max_epns; i++) {  in ast_vhub_dev_enable()
75 		struct ast_vhub_ep *ep = d->epns[i];  in ast_vhub_dev_enable()
77 		if (ep && (ep->epn.stalled || ep->epn.wedged)) {  in ast_vhub_dev_enable()
78 			ep->epn.stalled = false;  in ast_vhub_dev_enable()
79 			ep->epn.wedged = false;  in ast_vhub_dev_enable()
85 	d->wakeup_en = false;  in ast_vhub_dev_enable()
86 	d->enabled = true;  in ast_vhub_dev_enable()
93 	if (!d->enabled)  in ast_vhub_dev_disable()
97 	hmsk = VHUB_IRQ_DEVICE1 << d->index;  in ast_vhub_dev_disable()
98 	reg = readl(d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_disable()
100 	writel(reg, d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_disable()
103 	writel(0, d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_disable()
104 	d->gadget.speed = USB_SPEED_UNKNOWN;  in ast_vhub_dev_disable()
105 	d->enabled = false;  in ast_vhub_dev_disable()
118 		d->wakeup_en = is_set;  in ast_vhub_dev_feature()
123 		val = readl(d->vhub->regs + AST_VHUB_CTRL);  in ast_vhub_dev_feature()
126 		writel(val, d->vhub->regs + AST_VHUB_CTRL);  in ast_vhub_dev_feature()
145 	if (ep_num >= d->max_epns || !d->epns[ep_num - 1])  in ast_vhub_ep_feature()
150 	ep = d->epns[ep_num - 1];  in ast_vhub_ep_feature()
154 	if (!ep->epn.enabled || !ep->ep.desc || ep->epn.is_iso ||  in ast_vhub_ep_feature()
155 	    ep->epn.is_in != !!(wIndex & USB_DIR_IN))  in ast_vhub_ep_feature()
160 	ep->epn.stalled = is_set;  in ast_vhub_ep_feature()
173 	st0 = d->gadget.is_selfpowered << USB_DEVICE_SELF_POWERED;  in ast_vhub_dev_status()
174 	if (d->wakeup_en)  in ast_vhub_dev_status()
177 	return ast_vhub_simple_reply(&d->ep0, st0, 0);  in ast_vhub_dev_status()
189 	if (ep_num >= d->max_epns)  in ast_vhub_ep_status()
192 		ep = d->epns[ep_num - 1];  in ast_vhub_ep_status()
195 		if (!ep->epn.enabled || !ep->ep.desc || ep->epn.is_iso ||  in ast_vhub_ep_status()
196 		    ep->epn.is_in != !!(wIndex & USB_DIR_IN))  in ast_vhub_ep_status()
198 		if (ep->epn.stalled)  in ast_vhub_ep_status()
202 	return ast_vhub_simple_reply(&d->ep0, st0, 0);  in ast_vhub_ep_status()
211 	reg = readl(d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_set_address()
214 	writel(reg, d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_set_address()
220 	struct ast_vhub_dev *d = ep->dev;  in ast_vhub_std_dev_request()
224 	if (!d->driver || !d->enabled) {  in ast_vhub_std_dev_request()
227 		      d->driver, d->enabled);  in ast_vhub_std_dev_request()
237 	/* First packet, grab speed */  in ast_vhub_std_dev_request()
238 	if (d->gadget.speed == USB_SPEED_UNKNOWN) {  in ast_vhub_std_dev_request()
239 		d->gadget.speed = ep->vhub->speed;  in ast_vhub_std_dev_request()
240 		if (d->gadget.speed > d->driver->max_speed)  in ast_vhub_std_dev_request()
241 			d->gadget.speed = d->driver->max_speed;  in ast_vhub_std_dev_request()
242 		DDBG(d, "fist packet, captured speed %d\n",  in ast_vhub_std_dev_request()
243 		     d->gadget.speed);  in ast_vhub_std_dev_request()
246 	wValue = le16_to_cpu(crq->wValue);  in ast_vhub_std_dev_request()
247 	wIndex = le16_to_cpu(crq->wIndex);  in ast_vhub_std_dev_request()
249 	switch ((crq->bRequestType << 8) | crq->bRequest) {  in ast_vhub_std_dev_request()
280 	int rc = -EINVAL;  in ast_vhub_udc_wakeup()
282 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_wakeup()
283 	if (!d->wakeup_en)  in ast_vhub_udc_wakeup()
289 	ast_vhub_hub_wake_all(d->vhub);  in ast_vhub_udc_wakeup()
292 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_wakeup()
300 	return (readl(d->vhub->regs + AST_VHUB_USBSTS) >> 16) & 0x7ff;  in ast_vhub_udc_get_frame()
307 	for (i = 0; i < d->max_epns; i++) {  in ast_vhub_dev_nuke()
308 		if (!d->epns[i])  in ast_vhub_dev_nuke()
310 		ast_vhub_nuke(d->epns[i], -ESHUTDOWN);  in ast_vhub_dev_nuke()
319 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_pullup()
324 	ast_vhub_device_connect(d->vhub, d->index, on);  in ast_vhub_udc_pullup()
330 	if (d->enabled) {  in ast_vhub_udc_pullup()
335 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_pullup()
346 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_start()
351 	d->driver = driver;  in ast_vhub_udc_start()
352 	d->gadget.is_selfpowered = 1;  in ast_vhub_udc_start()
354 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_start()
366 	unsigned int max, addr, i;  in ast_vhub_udc_match_ep()  local
376 	list_for_each_entry(u_ep, &gadget->ep_list, ep_list) {  in ast_vhub_udc_match_ep()
378 			DDBG(d, " -> using existing EP%d\n",  in ast_vhub_udc_match_ep()
379 			     to_ast_ep(u_ep)->d_idx);  in ast_vhub_udc_match_ep()
394 		/* ISO:	 limit 1023 bytes full speed, 1024 high/super speed */  in ast_vhub_udc_match_ep()
396 			max = 1024;  in ast_vhub_udc_match_ep()
398 			max = 1023;  in ast_vhub_udc_match_ep()
402 			max = 512;  in ast_vhub_udc_match_ep()
404 			max = 64;  in ast_vhub_udc_match_ep()
408 			max = 1024;  in ast_vhub_udc_match_ep()
410 			max = 64;  in ast_vhub_udc_match_ep()
413 	if (usb_endpoint_maxp(desc) > max)  in ast_vhub_udc_match_ep()
424 	for (i = 0; i < d->max_epns; i++)  in ast_vhub_udc_match_ep()
425 		if (d->epns[i] == NULL)  in ast_vhub_udc_match_ep()
427 	if (i >= d->max_epns)  in ast_vhub_udc_match_ep()
439 	     ep->epn.g_idx, addr);  in ast_vhub_udc_match_ep()
441 	return &ep->ep;  in ast_vhub_udc_match_ep()
449 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_stop()
453 	d->driver = NULL;  in ast_vhub_udc_stop()
454 	d->gadget.speed = USB_SPEED_UNKNOWN;  in ast_vhub_udc_stop()
458 	if (d->enabled)  in ast_vhub_udc_stop()
461 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_stop()
477 	if (d->driver && d->driver->suspend) {  in ast_vhub_dev_suspend()
478 		spin_unlock(&d->vhub->lock);  in ast_vhub_dev_suspend()
479 		d->driver->suspend(&d->gadget);  in ast_vhub_dev_suspend()
480 		spin_lock(&d->vhub->lock);  in ast_vhub_dev_suspend()
486 	if (d->driver && d->driver->resume) {  in ast_vhub_dev_resume()
487 		spin_unlock(&d->vhub->lock);  in ast_vhub_dev_resume()
488 		d->driver->resume(&d->gadget);  in ast_vhub_dev_resume()
489 		spin_lock(&d->vhub->lock);  in ast_vhub_dev_resume()
496 	if (!d->driver) {  in ast_vhub_dev_reset()
502 	if (!d->enabled) {  in ast_vhub_dev_reset()
507 		spin_unlock(&d->vhub->lock);  in ast_vhub_dev_reset()
508 		usb_gadget_udc_reset(&d->gadget, d->driver);  in ast_vhub_dev_reset()
509 		spin_lock(&d->vhub->lock);  in ast_vhub_dev_reset()
512 		 * Disable and maybe re-enable HW, this will clear the address  in ast_vhub_dev_reset()
513 		 * and speed setting.  in ast_vhub_dev_reset()
524 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_del_dev()
525 	if (!d->registered) {  in ast_vhub_del_dev()
526 		spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_del_dev()
529 	d->registered = false;  in ast_vhub_del_dev()
530 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_del_dev()
532 	usb_del_gadget_udc(&d->gadget);  in ast_vhub_del_dev()
533 	device_unregister(d->port_dev);  in ast_vhub_del_dev()
534 	kfree(d->epns);  in ast_vhub_del_dev()
544 	struct ast_vhub_dev *d = &vhub->ports[idx].dev;  in ast_vhub_init_dev()
545 	struct device *parent = &vhub->pdev->dev;  in ast_vhub_init_dev()
548 	d->vhub = vhub;  in ast_vhub_init_dev()
549 	d->index = idx;  in ast_vhub_init_dev()
550 	d->name = devm_kasprintf(parent, GFP_KERNEL, "port%d", idx+1);  in ast_vhub_init_dev()
551 	d->regs = vhub->regs + 0x100 + 0x10 * idx;  in ast_vhub_init_dev()
553 	ast_vhub_init_ep0(vhub, &d->ep0, d);  in ast_vhub_init_dev()
559 	d->max_epns = min_t(u32, vhub->max_epns, 30);  in ast_vhub_init_dev()
560 	d->epns = kcalloc(d->max_epns, sizeof(*d->epns), GFP_KERNEL);  in ast_vhub_init_dev()
561 	if (!d->epns)  in ast_vhub_init_dev()
562 		return -ENOMEM;  in ast_vhub_init_dev()
569 	d->port_dev = kzalloc(sizeof(struct device), GFP_KERNEL);  in ast_vhub_init_dev()
570 	if (!d->port_dev) {  in ast_vhub_init_dev()
571 		rc = -ENOMEM;  in ast_vhub_init_dev()
574 	device_initialize(d->port_dev);  in ast_vhub_init_dev()
575 	d->port_dev->release = ast_vhub_dev_release;  in ast_vhub_init_dev()
576 	d->port_dev->parent = parent;  in ast_vhub_init_dev()
577 	dev_set_name(d->port_dev, "%s:p%d", dev_name(parent), idx + 1);  in ast_vhub_init_dev()
578 	rc = device_add(d->port_dev);  in ast_vhub_init_dev()
583 	INIT_LIST_HEAD(&d->gadget.ep_list);  in ast_vhub_init_dev()
584 	d->gadget.ops = &ast_vhub_udc_ops;  in ast_vhub_init_dev()
585 	d->gadget.ep0 = &d->ep0.ep;  in ast_vhub_init_dev()
586 	d->gadget.name = KBUILD_MODNAME;  in ast_vhub_init_dev()
587 	if (vhub->force_usb1)  in ast_vhub_init_dev()
588 		d->gadget.max_speed = USB_SPEED_FULL;  in ast_vhub_init_dev()
590 		d->gadget.max_speed = USB_SPEED_HIGH;  in ast_vhub_init_dev()
591 	d->gadget.speed = USB_SPEED_UNKNOWN;  in ast_vhub_init_dev()
592 	d->gadget.dev.of_node = vhub->pdev->dev.of_node;  in ast_vhub_init_dev()
593 	d->gadget.dev.of_node_reused = true;  in ast_vhub_init_dev()
595 	rc = usb_add_gadget_udc(d->port_dev, &d->gadget);  in ast_vhub_init_dev()
598 	d->registered = true;  in ast_vhub_init_dev()
602 	device_del(d->port_dev);  in ast_vhub_init_dev()
604 	put_device(d->port_dev);  in ast_vhub_init_dev()
606 	kfree(d->epns);  in ast_vhub_init_dev()