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)
26 #include <linux/dma-mapping.h>
34 	u32 istat = readl(d->regs + AST_VHUB_DEV_ISR);  in ast_vhub_dev_irq()
36 	writel(istat, d->regs + AST_VHUB_DEV_ISR);  in ast_vhub_dev_irq()
39 		ast_vhub_ep0_handle_ack(&d->ep0, true);  in ast_vhub_dev_irq()
41 		ast_vhub_ep0_handle_ack(&d->ep0, false);  in ast_vhub_dev_irq()
43 		ast_vhub_ep0_handle_setup(&d->ep0);  in ast_vhub_dev_irq()
50 	if (d->enabled)  in ast_vhub_dev_enable()
61 	if (d->gadget.speed == USB_SPEED_HIGH)  in ast_vhub_dev_enable()
63 	writel(reg, d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_enable()
66 	hmsk = VHUB_IRQ_DEVICE1 << d->index;  in ast_vhub_dev_enable()
67 	reg = readl(d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_enable()
69 	writel(reg, d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_enable()
72 	writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA);  in ast_vhub_dev_enable()
75 	for (i = 0; i < d->max_epns; i++) {  in ast_vhub_dev_enable()
76 		struct ast_vhub_ep *ep = d->epns[i];  in ast_vhub_dev_enable()
78 		if (ep && (ep->epn.stalled || ep->epn.wedged)) {  in ast_vhub_dev_enable()
79 			ep->epn.stalled = false;  in ast_vhub_dev_enable()
80 			ep->epn.wedged = false;  in ast_vhub_dev_enable()
86 	d->wakeup_en = false;  in ast_vhub_dev_enable()
87 	d->enabled = true;  in ast_vhub_dev_enable()
94 	if (!d->enabled)  in ast_vhub_dev_disable()
98 	hmsk = VHUB_IRQ_DEVICE1 << d->index;  in ast_vhub_dev_disable()
99 	reg = readl(d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_disable()
101 	writel(reg, d->vhub->regs + AST_VHUB_IER);  in ast_vhub_dev_disable()
104 	writel(0, d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_disable()
105 	d->gadget.speed = USB_SPEED_UNKNOWN;  in ast_vhub_dev_disable()
106 	d->enabled = false;  in ast_vhub_dev_disable()
119 	d->wakeup_en = is_set;  in ast_vhub_dev_feature()
135 	if (ep_num >= d->max_epns || !d->epns[ep_num - 1])  in ast_vhub_ep_feature()
140 	ep = d->epns[ep_num - 1];  in ast_vhub_ep_feature()
144 	if (!ep->epn.enabled || !ep->ep.desc || ep->epn.is_iso ||  in ast_vhub_ep_feature()
145 	    ep->epn.is_in != !!(wIndex & USB_DIR_IN))  in ast_vhub_ep_feature()
150 	ep->epn.stalled = is_set;  in ast_vhub_ep_feature()
163 	st0 = d->gadget.is_selfpowered << USB_DEVICE_SELF_POWERED;  in ast_vhub_dev_status()
164 	if (d->wakeup_en)  in ast_vhub_dev_status()
167 	return ast_vhub_simple_reply(&d->ep0, st0, 0);  in ast_vhub_dev_status()
179 	if (ep_num >= d->max_epns)  in ast_vhub_ep_status()
182 		ep = d->epns[ep_num - 1];  in ast_vhub_ep_status()
185 		if (!ep->epn.enabled || !ep->ep.desc || ep->epn.is_iso ||  in ast_vhub_ep_status()
186 		    ep->epn.is_in != !!(wIndex & USB_DIR_IN))  in ast_vhub_ep_status()
188 		if (ep->epn.stalled)  in ast_vhub_ep_status()
192 	return ast_vhub_simple_reply(&d->ep0, st0, 0);  in ast_vhub_ep_status()
201 	reg = readl(d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_set_address()
204 	writel(reg, d->regs + AST_VHUB_DEV_EN_CTRL);  in ast_vhub_dev_set_address()
210 	struct ast_vhub_dev *d = ep->dev;  in ast_vhub_std_dev_request()
214 	if (!d->driver || !d->enabled) {  in ast_vhub_std_dev_request()
217 		      d->driver, d->enabled);  in ast_vhub_std_dev_request()
227 	/* First packet, grab speed */  in ast_vhub_std_dev_request()
228 	if (d->gadget.speed == USB_SPEED_UNKNOWN) {  in ast_vhub_std_dev_request()
229 		d->gadget.speed = ep->vhub->speed;  in ast_vhub_std_dev_request()
230 		if (d->gadget.speed > d->driver->max_speed)  in ast_vhub_std_dev_request()
231 			d->gadget.speed = d->driver->max_speed;  in ast_vhub_std_dev_request()
232 		DDBG(d, "fist packet, captured speed %d\n",  in ast_vhub_std_dev_request()
233 		     d->gadget.speed);  in ast_vhub_std_dev_request()
236 	wValue = le16_to_cpu(crq->wValue);  in ast_vhub_std_dev_request()
237 	wIndex = le16_to_cpu(crq->wIndex);  in ast_vhub_std_dev_request()
239 	switch ((crq->bRequestType << 8) | crq->bRequest) {  in ast_vhub_std_dev_request()
270 	int rc = -EINVAL;  in ast_vhub_udc_wakeup()
272 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_wakeup()
273 	if (!d->wakeup_en)  in ast_vhub_udc_wakeup()
279 	ast_vhub_hub_wake_all(d->vhub);  in ast_vhub_udc_wakeup()
282 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_wakeup()
290 	return (readl(d->vhub->regs + AST_VHUB_USBSTS) >> 16) & 0x7ff;  in ast_vhub_udc_get_frame()
297 	for (i = 0; i < d->max_epns; i++) {  in ast_vhub_dev_nuke()
298 		if (!d->epns[i])  in ast_vhub_dev_nuke()
300 		ast_vhub_nuke(d->epns[i], -ESHUTDOWN);  in ast_vhub_dev_nuke()
309 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_pullup()
314 	ast_vhub_device_connect(d->vhub, d->index, on);  in ast_vhub_udc_pullup()
320 	if (d->enabled) {  in ast_vhub_udc_pullup()
325 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_pullup()
336 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_start()
341 	d->driver = driver;  in ast_vhub_udc_start()
342 	d->gadget.is_selfpowered = 1;  in ast_vhub_udc_start()
344 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_start()
356 	unsigned int max, addr, i;  in ast_vhub_udc_match_ep()  local
366 	list_for_each_entry(u_ep, &gadget->ep_list, ep_list) {  in ast_vhub_udc_match_ep()
368 			DDBG(d, " -> using existing EP%d\n",  in ast_vhub_udc_match_ep()
369 			     to_ast_ep(u_ep)->d_idx);  in ast_vhub_udc_match_ep()
384 		/* ISO:	 limit 1023 bytes full speed, 1024 high/super speed */  in ast_vhub_udc_match_ep()
386 			max = 1024;  in ast_vhub_udc_match_ep()
388 			max = 1023;  in ast_vhub_udc_match_ep()
392 			max = 512;  in ast_vhub_udc_match_ep()
394 			max = 64;  in ast_vhub_udc_match_ep()
398 			max = 1024;  in ast_vhub_udc_match_ep()
400 			max = 64;  in ast_vhub_udc_match_ep()
403 	if (usb_endpoint_maxp(desc) > max)  in ast_vhub_udc_match_ep()
414 	for (i = 0; i < d->max_epns; i++)  in ast_vhub_udc_match_ep()
415 		if (d->epns[i] == NULL)  in ast_vhub_udc_match_ep()
417 	if (i >= d->max_epns)  in ast_vhub_udc_match_ep()
429 	     ep->epn.g_idx, addr);  in ast_vhub_udc_match_ep()
431 	return &ep->ep;  in ast_vhub_udc_match_ep()
439 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_udc_stop()
443 	d->driver = NULL;  in ast_vhub_udc_stop()
444 	d->gadget.speed = USB_SPEED_UNKNOWN;  in ast_vhub_udc_stop()
448 	if (d->enabled)  in ast_vhub_udc_stop()
451 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_udc_stop()
467 	if (d->driver && d->driver->suspend) {  in ast_vhub_dev_suspend()
468 		spin_unlock(&d->vhub->lock);  in ast_vhub_dev_suspend()
469 		d->driver->suspend(&d->gadget);  in ast_vhub_dev_suspend()
470 		spin_lock(&d->vhub->lock);  in ast_vhub_dev_suspend()
476 	if (d->driver && d->driver->resume) {  in ast_vhub_dev_resume()
477 		spin_unlock(&d->vhub->lock);  in ast_vhub_dev_resume()
478 		d->driver->resume(&d->gadget);  in ast_vhub_dev_resume()
479 		spin_lock(&d->vhub->lock);  in ast_vhub_dev_resume()
486 	if (!d->driver) {  in ast_vhub_dev_reset()
492 	if (!d->enabled) {  in ast_vhub_dev_reset()
497 		spin_unlock(&d->vhub->lock);  in ast_vhub_dev_reset()
498 		usb_gadget_udc_reset(&d->gadget, d->driver);  in ast_vhub_dev_reset()
499 		spin_lock(&d->vhub->lock);  in ast_vhub_dev_reset()
502 		 * Disable and maybe re-enable HW, this will clear the address  in ast_vhub_dev_reset()
503 		 * and speed setting.  in ast_vhub_dev_reset()
514 	spin_lock_irqsave(&d->vhub->lock, flags);  in ast_vhub_del_dev()
515 	if (!d->registered) {  in ast_vhub_del_dev()
516 		spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_del_dev()
519 	d->registered = false;  in ast_vhub_del_dev()
520 	spin_unlock_irqrestore(&d->vhub->lock, flags);  in ast_vhub_del_dev()
522 	usb_del_gadget_udc(&d->gadget);  in ast_vhub_del_dev()
523 	device_unregister(d->port_dev);  in ast_vhub_del_dev()
524 	kfree(d->epns);  in ast_vhub_del_dev()
534 	struct ast_vhub_dev *d = &vhub->ports[idx].dev;  in ast_vhub_init_dev()
535 	struct device *parent = &vhub->pdev->dev;  in ast_vhub_init_dev()
538 	d->vhub = vhub;  in ast_vhub_init_dev()
539 	d->index = idx;  in ast_vhub_init_dev()
540 	d->name = devm_kasprintf(parent, GFP_KERNEL, "port%d", idx+1);  in ast_vhub_init_dev()
541 	d->regs = vhub->regs + 0x100 + 0x10 * idx;  in ast_vhub_init_dev()
543 	ast_vhub_init_ep0(vhub, &d->ep0, d);  in ast_vhub_init_dev()
549 	d->max_epns = min_t(u32, vhub->max_epns, 30);  in ast_vhub_init_dev()
550 	d->epns = kcalloc(d->max_epns, sizeof(*d->epns), GFP_KERNEL);  in ast_vhub_init_dev()
551 	if (!d->epns)  in ast_vhub_init_dev()
552 		return -ENOMEM;  in ast_vhub_init_dev()
559 	d->port_dev = kzalloc(sizeof(struct device), GFP_KERNEL);  in ast_vhub_init_dev()
560 	if (!d->port_dev) {  in ast_vhub_init_dev()
561 		rc = -ENOMEM;  in ast_vhub_init_dev()
564 	device_initialize(d->port_dev);  in ast_vhub_init_dev()
565 	d->port_dev->release = ast_vhub_dev_release;  in ast_vhub_init_dev()
566 	d->port_dev->parent = parent;  in ast_vhub_init_dev()
567 	dev_set_name(d->port_dev, "%s:p%d", dev_name(parent), idx + 1);  in ast_vhub_init_dev()
568 	rc = device_add(d->port_dev);  in ast_vhub_init_dev()
573 	INIT_LIST_HEAD(&d->gadget.ep_list);  in ast_vhub_init_dev()
574 	d->gadget.ops = &ast_vhub_udc_ops;  in ast_vhub_init_dev()
575 	d->gadget.ep0 = &d->ep0.ep;  in ast_vhub_init_dev()
576 	d->gadget.name = KBUILD_MODNAME;  in ast_vhub_init_dev()
577 	if (vhub->force_usb1)  in ast_vhub_init_dev()
578 		d->gadget.max_speed = USB_SPEED_FULL;  in ast_vhub_init_dev()
580 		d->gadget.max_speed = USB_SPEED_HIGH;  in ast_vhub_init_dev()
581 	d->gadget.speed = USB_SPEED_UNKNOWN;  in ast_vhub_init_dev()
582 	d->gadget.dev.of_node = vhub->pdev->dev.of_node;  in ast_vhub_init_dev()
584 	rc = usb_add_gadget_udc(d->port_dev, &d->gadget);  in ast_vhub_init_dev()
587 	d->registered = true;  in ast_vhub_init_dev()
591 	device_del(d->port_dev);  in ast_vhub_init_dev()
593 	put_device(d->port_dev);  in ast_vhub_init_dev()
595 	kfree(d->epns);  in ast_vhub_init_dev()