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.
28 #include <linux/err.h>
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 static const struct hc_driver ehci_grlib_hc_driver
= {
38 .description
= hcd_name
,
39 .product_desc
= "GRLIB GRUSBHC EHCI",
40 .hcd_priv_size
= sizeof(struct ehci_hcd
),
43 * generic hardware linkage
46 .flags
= HCD_MEMORY
| HCD_USB2
,
49 * basic lifecycle operations
54 .shutdown
= ehci_shutdown
,
57 * managing i/o requests and associated device resources
59 .urb_enqueue
= ehci_urb_enqueue
,
60 .urb_dequeue
= ehci_urb_dequeue
,
61 .endpoint_disable
= ehci_endpoint_disable
,
62 .endpoint_reset
= ehci_endpoint_reset
,
67 .get_frame_number
= ehci_get_frame
,
72 .hub_status_data
= ehci_hub_status_data
,
73 .hub_control
= ehci_hub_control
,
75 .bus_suspend
= ehci_bus_suspend
,
76 .bus_resume
= ehci_bus_resume
,
78 .relinquish_port
= ehci_relinquish_port
,
79 .port_handed_over
= ehci_port_handed_over
,
81 .clear_tt_buffer_complete
= ehci_clear_tt_buffer_complete
,
85 static int ehci_hcd_grlib_probe(struct platform_device
*op
)
87 struct device_node
*dn
= op
->dev
.of_node
;
89 struct ehci_hcd
*ehci
= NULL
;
98 dev_dbg(&op
->dev
, "initializing GRUSBHC EHCI USB Controller\n");
100 rv
= of_address_to_resource(dn
, 0, &res
);
104 /* usb_create_hcd requires dma_mask != NULL */
105 op
->dev
.dma_mask
= &op
->dev
.coherent_dma_mask
;
106 hcd
= usb_create_hcd(&ehci_grlib_hc_driver
, &op
->dev
,
111 hcd
->rsrc_start
= res
.start
;
112 hcd
->rsrc_len
= resource_size(&res
);
114 irq
= irq_of_parse_and_map(dn
, 0);
116 printk(KERN_ERR
"%s: irq_of_parse_and_map failed\n", __FILE__
);
121 hcd
->regs
= devm_ioremap_resource(&op
->dev
, &res
);
122 if (IS_ERR(hcd
->regs
)) {
123 rv
= PTR_ERR(hcd
->regs
);
127 ehci
= hcd_to_ehci(hcd
);
129 ehci
->caps
= hcd
->regs
;
131 /* determine endianness of this implementation */
132 hc_capbase
= ehci_readl(ehci
, &ehci
->caps
->hc_capbase
);
133 if (HC_VERSION(ehci
, hc_capbase
) != GRUSBHC_HCIVERSION
) {
134 ehci
->big_endian_mmio
= 1;
135 ehci
->big_endian_desc
= 1;
136 ehci
->big_endian_capbase
= 1;
139 rv
= usb_add_hcd(hcd
, irq
, 0);
146 irq_dispose_mapping(irq
);
154 static int ehci_hcd_grlib_remove(struct platform_device
*op
)
156 struct usb_hcd
*hcd
= platform_get_drvdata(op
);
158 dev_dbg(&op
->dev
, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
162 irq_dispose_mapping(hcd
->irq
);
170 static void ehci_hcd_grlib_shutdown(struct platform_device
*op
)
172 struct usb_hcd
*hcd
= platform_get_drvdata(op
);
174 if (hcd
->driver
->shutdown
)
175 hcd
->driver
->shutdown(hcd
);
179 static const struct of_device_id ehci_hcd_grlib_of_match
[] = {
181 .name
= "GAISLER_EHCI",
188 MODULE_DEVICE_TABLE(of
, ehci_hcd_grlib_of_match
);
191 static struct platform_driver ehci_grlib_driver
= {
192 .probe
= ehci_hcd_grlib_probe
,
193 .remove
= ehci_hcd_grlib_remove
,
194 .shutdown
= ehci_hcd_grlib_shutdown
,
196 .name
= "grlib-ehci",
197 .owner
= THIS_MODULE
,
198 .of_match_table
= ehci_hcd_grlib_of_match
,