2 * Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
4 * GRUSBHC is typically found on LEON/GRLIB SoCs
6 * (c) Jan Andersson <jan@gaisler.com>
8 * Based on ehci-ppc-of.c which is:
9 * (c) Valentine Barshak <vbarshak@ru.mvista.com>
10 * and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
11 * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
20 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software Foundation,
25 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <linux/signal.h>
31 #include <linux/of_irq.h>
32 #include <linux/of_address.h>
33 #include <linux/of_platform.h>
35 #define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
37 /* called during probe() after chip reset completes */
38 static int ehci_grlib_setup(struct usb_hcd *hcd)
40 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
43 retval = ehci_setup(hcd);
47 ehci_port_power(ehci, 1);
53 static const struct hc_driver ehci_grlib_hc_driver = {
54 .description = hcd_name,
55 .product_desc = "GRLIB GRUSBHC EHCI",
56 .hcd_priv_size = sizeof(struct ehci_hcd),
59 * generic hardware linkage
62 .flags = HCD_MEMORY | HCD_USB2,
65 * basic lifecycle operations
67 .reset = ehci_grlib_setup,
70 .shutdown = ehci_shutdown,
73 * managing i/o requests and associated device resources
75 .urb_enqueue = ehci_urb_enqueue,
76 .urb_dequeue = ehci_urb_dequeue,
77 .endpoint_disable = ehci_endpoint_disable,
78 .endpoint_reset = ehci_endpoint_reset,
83 .get_frame_number = ehci_get_frame,
88 .hub_status_data = ehci_hub_status_data,
89 .hub_control = ehci_hub_control,
91 .bus_suspend = ehci_bus_suspend,
92 .bus_resume = ehci_bus_resume,
94 .relinquish_port = ehci_relinquish_port,
95 .port_handed_over = ehci_port_handed_over,
97 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
101 static int __devinit ehci_hcd_grlib_probe(struct platform_device *op)
103 struct device_node *dn = op->dev.of_node;
105 struct ehci_hcd *ehci = NULL;
114 dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
116 rv = of_address_to_resource(dn, 0, &res);
120 /* usb_create_hcd requires dma_mask != NULL */
121 op->dev.dma_mask = &op->dev.coherent_dma_mask;
122 hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
127 hcd->rsrc_start = res.start;
128 hcd->rsrc_len = resource_size(&res);
130 irq = irq_of_parse_and_map(dn, 0);
132 printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
137 hcd->regs = devm_request_and_ioremap(&op->dev, &res);
139 pr_err("%s: devm_request_and_ioremap failed\n", __FILE__);
144 ehci = hcd_to_ehci(hcd);
146 ehci->caps = hcd->regs;
148 /* determine endianness of this implementation */
149 hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
150 if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
151 ehci->big_endian_mmio = 1;
152 ehci->big_endian_desc = 1;
153 ehci->big_endian_capbase = 1;
156 rv = usb_add_hcd(hcd, irq, 0);
163 irq_dispose_mapping(irq);
171 static int ehci_hcd_grlib_remove(struct platform_device *op)
173 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
175 dev_set_drvdata(&op->dev, NULL);
177 dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
181 irq_dispose_mapping(hcd->irq);
189 static void ehci_hcd_grlib_shutdown(struct platform_device *op)
191 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
193 if (hcd->driver->shutdown)
194 hcd->driver->shutdown(hcd);
198 static const struct of_device_id ehci_hcd_grlib_of_match[] = {
200 .name = "GAISLER_EHCI",
207 MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
210 static struct platform_driver ehci_grlib_driver = {
211 .probe = ehci_hcd_grlib_probe,
212 .remove = ehci_hcd_grlib_remove,
213 .shutdown = ehci_hcd_grlib_shutdown,
215 .name = "grlib-ehci",
216 .owner = THIS_MODULE,
217 .of_match_table = ehci_hcd_grlib_of_match,