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_OHCI_HCD_NAME "octeon-ohci"
21 /* Common clock init code. */
22 void octeon2_usb_clocks_start(void);
23 void octeon2_usb_clocks_stop(void);
25 static void ohci_octeon_hw_start(void)
27 union cvmx_uctlx_ohci_ctl ohci_ctl;
29 octeon2_usb_clocks_start();
31 ohci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_OHCI_CTL(0));
32 ohci_ctl.s.l2c_addr_msb = 0;
33 ohci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
34 ohci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
35 cvmx_write_csr(CVMX_UCTLX_OHCI_CTL(0), ohci_ctl.u64);
39 static void ohci_octeon_hw_stop(void)
41 /* Undo ohci_octeon_start() */
42 octeon2_usb_clocks_stop();
45 static int __devinit ohci_octeon_start(struct usb_hcd *hcd)
47 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
50 ret = ohci_init(ohci);
58 ohci_err(ohci, "can't start %s", hcd->self.bus_name);
66 static const struct hc_driver ohci_octeon_hc_driver = {
67 .description = hcd_name,
68 .product_desc = "Octeon OHCI",
69 .hcd_priv_size = sizeof(struct ohci_hcd),
72 * generic hardware linkage
75 .flags = HCD_USB11 | HCD_MEMORY,
78 * basic lifecycle operations
80 .start = ohci_octeon_start,
82 .shutdown = ohci_shutdown,
85 * managing i/o requests and associated device resources
87 .urb_enqueue = ohci_urb_enqueue,
88 .urb_dequeue = ohci_urb_dequeue,
89 .endpoint_disable = ohci_endpoint_disable,
94 .get_frame_number = ohci_get_frame,
99 .hub_status_data = ohci_hub_status_data,
100 .hub_control = ohci_hub_control,
102 .start_port_reset = ohci_start_port_reset,
105 static int ohci_octeon_drv_probe(struct platform_device *pdev)
108 struct ohci_hcd *ohci;
110 struct resource *res_mem;
117 irq = platform_get_irq(pdev, 0);
119 dev_err(&pdev->dev, "No irq assigned\n");
123 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
124 if (res_mem == NULL) {
125 dev_err(&pdev->dev, "No register space assigned\n");
129 /* Ohci is a 32-bit device. */
130 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
131 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
133 hcd = usb_create_hcd(&ohci_octeon_hc_driver, &pdev->dev, "octeon");
137 hcd->rsrc_start = res_mem->start;
138 hcd->rsrc_len = resource_size(res_mem);
140 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
141 OCTEON_OHCI_HCD_NAME)) {
142 dev_err(&pdev->dev, "request_mem_region failed\n");
147 reg_base = ioremap(hcd->rsrc_start, hcd->rsrc_len);
149 dev_err(&pdev->dev, "ioremap failed\n");
154 ohci_octeon_hw_start();
156 hcd->regs = reg_base;
158 ohci = hcd_to_ohci(hcd);
160 /* Octeon OHCI matches CPU endianness. */
162 ohci->flags |= OHCI_QUIRK_BE_MMIO;
167 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
169 dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
173 platform_set_drvdata(pdev, hcd);
178 ohci_octeon_hw_stop();
182 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
188 static int ohci_octeon_drv_remove(struct platform_device *pdev)
190 struct usb_hcd *hcd = platform_get_drvdata(pdev);
194 ohci_octeon_hw_stop();
196 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
199 platform_set_drvdata(pdev, NULL);
204 static struct platform_driver ohci_octeon_driver = {
205 .probe = ohci_octeon_drv_probe,
206 .remove = ohci_octeon_drv_remove,
207 .shutdown = usb_hcd_platform_shutdown,
209 .name = OCTEON_OHCI_HCD_NAME,
210 .owner = THIS_MODULE,
214 MODULE_ALIAS("platform:" OCTEON_OHCI_HCD_NAME);