2 * EHCI HCD glue for Cavium Octeon II SOCs.
4 * Loosely based on ehci-au1xxx.c
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
10 * Copyright (C) 2010 Cavium Networks
14 #include <linux/platform_device.h>
16 #include <asm/octeon/octeon.h>
17 #include <asm/octeon/cvmx-uctlx-defs.h>
19 #define OCTEON_EHCI_HCD_NAME "octeon-ehci"
21 /* Common clock init code. */
22 void octeon2_usb_clocks_start(void);
23 void octeon2_usb_clocks_stop(void);
25 static void ehci_octeon_start(void)
27 union cvmx_uctlx_ehci_ctl ehci_ctl;
29 octeon2_usb_clocks_start();
31 ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0));
32 /* Use 64-bit addressing. */
33 ehci_ctl.s.ehci_64b_addr_en = 1;
34 ehci_ctl.s.l2c_addr_msb = 0;
35 ehci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
36 ehci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
37 cvmx_write_csr(CVMX_UCTLX_EHCI_CTL(0), ehci_ctl.u64);
40 static void ehci_octeon_stop(void)
42 octeon2_usb_clocks_stop();
45 static const struct hc_driver ehci_octeon_hc_driver = {
46 .description = hcd_name,
47 .product_desc = "Octeon EHCI",
48 .hcd_priv_size = sizeof(struct ehci_hcd),
51 * generic hardware linkage
54 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
57 * basic lifecycle operations
62 .shutdown = ehci_shutdown,
65 * managing i/o requests and associated device resources
67 .urb_enqueue = ehci_urb_enqueue,
68 .urb_dequeue = ehci_urb_dequeue,
69 .endpoint_disable = ehci_endpoint_disable,
70 .endpoint_reset = ehci_endpoint_reset,
75 .get_frame_number = ehci_get_frame,
80 .hub_status_data = ehci_hub_status_data,
81 .hub_control = ehci_hub_control,
82 .bus_suspend = ehci_bus_suspend,
83 .bus_resume = ehci_bus_resume,
84 .relinquish_port = ehci_relinquish_port,
85 .port_handed_over = ehci_port_handed_over,
87 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
90 static u64 ehci_octeon_dma_mask = DMA_BIT_MASK(64);
92 static int ehci_octeon_drv_probe(struct platform_device *pdev)
95 struct ehci_hcd *ehci;
96 struct resource *res_mem;
103 irq = platform_get_irq(pdev, 0);
105 dev_err(&pdev->dev, "No irq assigned\n");
110 * We can DMA from anywhere. But the descriptors must be in
113 pdev->dev.dma_mask = &ehci_octeon_dma_mask;
114 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
118 hcd = usb_create_hcd(&ehci_octeon_hc_driver, &pdev->dev, "octeon");
122 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
123 hcd->regs = devm_ioremap_resource(&pdev->dev, res_mem);
124 if (IS_ERR(hcd->regs)) {
125 ret = PTR_ERR(hcd->regs);
128 hcd->rsrc_start = res_mem->start;
129 hcd->rsrc_len = resource_size(res_mem);
133 ehci = hcd_to_ehci(hcd);
135 /* Octeon EHCI matches CPU endianness. */
137 ehci->big_endian_mmio = 1;
140 ehci->caps = hcd->regs;
142 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
144 dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
147 device_wakeup_enable(hcd->self.controller);
149 platform_set_drvdata(pdev, hcd);
160 static int ehci_octeon_drv_remove(struct platform_device *pdev)
162 struct usb_hcd *hcd = platform_get_drvdata(pdev);
172 static struct platform_driver ehci_octeon_driver = {
173 .probe = ehci_octeon_drv_probe,
174 .remove = ehci_octeon_drv_remove,
175 .shutdown = usb_hcd_platform_shutdown,
177 .name = OCTEON_EHCI_HCD_NAME,
178 .owner = THIS_MODULE,
182 MODULE_ALIAS("platform:" OCTEON_EHCI_HCD_NAME);