usb/host/ehci-npcm7xx.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Nuvoton NPCM7xx driver for EHCI HCD
9  * Based on various ehci-spear.c driver
13 #include <linux/dma-mapping.h>
20 #include <linux/usb.h>
21 #include <linux/usb/hcd.h>
23 #include "ehci.h"
25 #define DRIVER_DESC "EHCI npcm7xx driver"
56 	dev_dbg(&pdev->dev, "initializing npcm7xx ehci USB Controller\n");  in npcm7xx_ehci_hcd_drv_probe()
59 		return -ENODEV;  in npcm7xx_ehci_hcd_drv_probe()
68 	 * Right now device-tree probed devices don't get dma_mask set.  in npcm7xx_ehci_hcd_drv_probe()
69 	 * Since shared usb code relies on it, set it here for now.  in npcm7xx_ehci_hcd_drv_probe()
72 	retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in npcm7xx_ehci_hcd_drv_probe()
76 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));  in npcm7xx_ehci_hcd_drv_probe()
78 		retval = -ENOMEM;  in npcm7xx_ehci_hcd_drv_probe()
82 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in npcm7xx_ehci_hcd_drv_probe()
83 	if (IS_ERR(hcd->regs)) {  in npcm7xx_ehci_hcd_drv_probe()
84 		retval = PTR_ERR(hcd->regs);  in npcm7xx_ehci_hcd_drv_probe()
87 	hcd->rsrc_start = res->start;  in npcm7xx_ehci_hcd_drv_probe()
88 	hcd->rsrc_len = resource_size(res);  in npcm7xx_ehci_hcd_drv_probe()
91 	hcd_to_ehci(hcd)->caps = hcd->regs;  in npcm7xx_ehci_hcd_drv_probe()
97 	device_wakeup_enable(hcd->self.controller);  in npcm7xx_ehci_hcd_drv_probe()
103 	dev_err(&pdev->dev, "init fail, %d\n", retval);  in npcm7xx_ehci_hcd_drv_probe()
118 	{ .compatible = "nuvoton,npcm750-ehci" },
128 		.name = "npcm7xx-ehci",
138 		return -ENODEV;  in ehci_npcm7xx_init()
152 MODULE_ALIAS("platform:npcm7xx-ehci");