1 // SPDX-License-Identifier: GPL-2.0+
3  * amd5536udc_pci.c -- AMD 5536 UDC high/full speed USB device controller
5  * Copyright (C) 2005-2007 AMD (https://www.amd.com)
11  * It is a USB Highspeed DMA capable USB device controller. Beside ep0 it
18  * UDC DMA requires 32-bit aligned buffers so DMA with gadget ether does not
26  * Synopsys device controller IP (different than HS OTG IP) in UDCs
32 #define UDC_MOD_DESCRIPTION		"AMD 5536 UDC - USB Device Controller"
52 static const char name[] = "amd5536udc-pci";
61 	usb_del_gadget_udc(&udc->gadget);  in udc_pci_remove()
63 	if (WARN_ON(dev->driver))  in udc_pci_remove()
70 	writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg);  in udc_pci_remove()
71 	free_irq(pdev->irq, dev);  in udc_pci_remove()
72 	iounmap(dev->virt_addr);  in udc_pci_remove()
92 	if (udc) {  in udc_pci_probe()
93 		dev_dbg(&pdev->dev, "already probed\n");  in udc_pci_probe()
94 		return -EBUSY;  in udc_pci_probe()
99 	if (!dev)  in udc_pci_probe()
100 		return -ENOMEM;  in udc_pci_probe()
103 	if (pci_enable_device(pdev) < 0) {  in udc_pci_probe()
104 		retval = -ENODEV;  in udc_pci_probe()
112 	if (!request_mem_region(resource, len, name)) {  in udc_pci_probe()
113 		dev_dbg(&pdev->dev, "pci device used already\n");  in udc_pci_probe()
114 		retval = -EBUSY;  in udc_pci_probe()
118 	dev->virt_addr = ioremap(resource, len);  in udc_pci_probe()
119 	if (!dev->virt_addr) {  in udc_pci_probe()
120 		dev_dbg(&pdev->dev, "start address cannot be mapped\n");  in udc_pci_probe()
121 		retval = -EFAULT;  in udc_pci_probe()
125 	if (!pdev->irq) {  in udc_pci_probe()
126 		dev_err(&pdev->dev, "irq not set\n");  in udc_pci_probe()
127 		retval = -ENODEV;  in udc_pci_probe()
131 	spin_lock_init(&dev->lock);  in udc_pci_probe()
133 	dev->csr = dev->virt_addr + UDC_CSR_ADDR;  in udc_pci_probe()
135 	dev->regs = dev->virt_addr + UDC_DEVCFG_ADDR;  in udc_pci_probe()
137 	dev->ep_regs = dev->virt_addr + UDC_EPREGS_ADDR;  in udc_pci_probe()
139 	dev->rxfifo = (u32 __iomem *)(dev->virt_addr + UDC_RXFIFO_ADDR);  in udc_pci_probe()
140 	dev->txfifo = (u32 __iomem *)(dev->virt_addr + UDC_TXFIFO_ADDR);  in udc_pci_probe()
142 	if (request_irq(pdev->irq, udc_irq, IRQF_SHARED, name, dev) != 0) {  in udc_pci_probe()
143 		dev_dbg(&pdev->dev, "request_irq(%d) fail\n", pdev->irq);  in udc_pci_probe()
144 		retval = -EBUSY;  in udc_pci_probe()
150 	/* chip revision for Hs AMD5536 */  in udc_pci_probe()
151 	dev->chiprev = pdev->revision;  in udc_pci_probe()
156 	dev->phys_addr = resource;  in udc_pci_probe()
157 	dev->irq = pdev->irq;  in udc_pci_probe()
158 	dev->pdev = pdev;  in udc_pci_probe()
159 	dev->dev = &pdev->dev;  in udc_pci_probe()
162 	if (use_dma) {  in udc_pci_probe()
164 		if (retval != 0)  in udc_pci_probe()
169 	if (udc_probe(dev)) {  in udc_pci_probe()
170 		retval = -ENODEV;  in udc_pci_probe()
176 	if (use_dma)  in udc_pci_probe()
179 	free_irq(pdev->irq, dev);  in udc_pci_probe()
181 	iounmap(dev->virt_addr);  in udc_pci_probe()