blob: 22540ab71f555dd9c60b461216cd46b2bbfb82ee [file] [log] [blame]
Chris Metcalf47fc28b2012-05-09 13:58:14 -04001/*
2 * Copyright 2012 Tilera Corporation. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
12 * more details.
13 */
14
15/*
16 * Tilera TILE-Gx USB OHCI host controller driver.
17 */
18
19#include <linux/irq.h>
20#include <linux/platform_device.h>
21#include <linux/usb/tilegx.h>
22#include <linux/usb.h>
23
24#include <asm/homecache.h>
25
26#include <gxio/iorpc_usb_host.h>
27#include <gxio/usb_host.h>
28
29static void tilegx_start_ohc(void)
30{
31}
32
33static void tilegx_stop_ohc(void)
34{
35}
36
37static int tilegx_ohci_start(struct usb_hcd *hcd)
38{
39 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
40 int ret;
41
42 ret = ohci_init(ohci);
43 if (ret < 0)
44 return ret;
45
46 ret = ohci_run(ohci);
47 if (ret < 0) {
48 dev_err(hcd->self.controller, "can't start %s\n",
49 hcd->self.bus_name);
50 ohci_stop(hcd);
51 return ret;
52 }
53
54 return 0;
55}
56
57static const struct hc_driver ohci_tilegx_hc_driver = {
58 .description = hcd_name,
59 .product_desc = "Tile-Gx OHCI",
60 .hcd_priv_size = sizeof(struct ohci_hcd),
61
62 /*
63 * Generic hardware linkage.
64 */
65 .irq = ohci_irq,
66 .flags = HCD_MEMORY | HCD_LOCAL_MEM | HCD_USB11,
67
68 /*
69 * Basic lifecycle operations.
70 */
71 .start = tilegx_ohci_start,
72 .stop = ohci_stop,
73 .shutdown = ohci_shutdown,
74
75 /*
76 * Managing I/O requests and associated device resources.
77 */
78 .urb_enqueue = ohci_urb_enqueue,
79 .urb_dequeue = ohci_urb_dequeue,
80 .endpoint_disable = ohci_endpoint_disable,
81
82 /*
83 * Scheduling support.
84 */
85 .get_frame_number = ohci_get_frame,
86
87 /*
88 * Root hub support.
89 */
90 .hub_status_data = ohci_hub_status_data,
91 .hub_control = ohci_hub_control,
92 .start_port_reset = ohci_start_port_reset,
93};
94
95static int ohci_hcd_tilegx_drv_probe(struct platform_device *pdev)
96{
97 struct usb_hcd *hcd;
Jingoo Hand4f09e22013-07-30 19:59:40 +090098 struct tilegx_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
Chris Metcalf47fc28b2012-05-09 13:58:14 -040099 pte_t pte = { 0 };
100 int my_cpu = smp_processor_id();
101 int ret;
102
103 if (usb_disabled())
104 return -ENODEV;
105
106 /*
107 * Try to initialize our GXIO context; if we can't, the device
108 * doesn't exist.
109 */
110 if (gxio_usb_host_init(&pdata->usb_ctx, pdata->dev_index, 0) != 0)
111 return -ENXIO;
112
113 hcd = usb_create_hcd(&ohci_tilegx_hc_driver, &pdev->dev,
114 dev_name(&pdev->dev));
Libo Chenabab8762013-05-09 02:08:33 -0400115 if (!hcd) {
116 ret = -ENOMEM;
117 goto err_hcd;
118 }
Chris Metcalf47fc28b2012-05-09 13:58:14 -0400119
120 /*
121 * We don't use rsrc_start to map in our registers, but seems like
122 * we ought to set it to something, so we use the register VA.
123 */
124 hcd->rsrc_start =
125 (ulong) gxio_usb_host_get_reg_start(&pdata->usb_ctx);
126 hcd->rsrc_len = gxio_usb_host_get_reg_len(&pdata->usb_ctx);
127 hcd->regs = gxio_usb_host_get_reg_start(&pdata->usb_ctx);
128
129 tilegx_start_ohc();
130
131 /* Create our IRQs and register them. */
132 pdata->irq = create_irq();
133 if (pdata->irq < 0) {
134 ret = -ENXIO;
135 goto err_no_irq;
136 }
137
138 tile_irq_activate(pdata->irq, TILE_IRQ_PERCPU);
139
140 /* Configure interrupts. */
141 ret = gxio_usb_host_cfg_interrupt(&pdata->usb_ctx,
142 cpu_x(my_cpu), cpu_y(my_cpu),
143 KERNEL_PL, pdata->irq);
144 if (ret) {
145 ret = -ENXIO;
146 goto err_have_irq;
147 }
148
149 /* Register all of our memory. */
150 pte = pte_set_home(pte, PAGE_HOME_HASH);
151 ret = gxio_usb_host_register_client_memory(&pdata->usb_ctx, pte, 0);
152 if (ret) {
153 ret = -ENXIO;
154 goto err_have_irq;
155 }
156
157 ohci_hcd_init(hcd_to_ohci(hcd));
158
159 ret = usb_add_hcd(hcd, pdata->irq, IRQF_SHARED);
160 if (ret == 0) {
161 platform_set_drvdata(pdev, hcd);
162 return ret;
163 }
164
165err_have_irq:
166 destroy_irq(pdata->irq);
167err_no_irq:
168 tilegx_stop_ohc();
169 usb_put_hcd(hcd);
Libo Chenabab8762013-05-09 02:08:33 -0400170err_hcd:
Chris Metcalf47fc28b2012-05-09 13:58:14 -0400171 gxio_usb_host_destroy(&pdata->usb_ctx);
172 return ret;
173}
174
175static int ohci_hcd_tilegx_drv_remove(struct platform_device *pdev)
176{
177 struct usb_hcd *hcd = platform_get_drvdata(pdev);
Jingoo Hand4f09e22013-07-30 19:59:40 +0900178 struct tilegx_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
Chris Metcalf47fc28b2012-05-09 13:58:14 -0400179
180 usb_remove_hcd(hcd);
181 usb_put_hcd(hcd);
182 tilegx_stop_ohc();
183 gxio_usb_host_destroy(&pdata->usb_ctx);
184 destroy_irq(pdata->irq);
Chris Metcalf47fc28b2012-05-09 13:58:14 -0400185
186 return 0;
187}
188
189static void ohci_hcd_tilegx_drv_shutdown(struct platform_device *pdev)
190{
191 usb_hcd_platform_shutdown(pdev);
192 ohci_hcd_tilegx_drv_remove(pdev);
193}
194
195static struct platform_driver ohci_hcd_tilegx_driver = {
196 .probe = ohci_hcd_tilegx_drv_probe,
197 .remove = ohci_hcd_tilegx_drv_remove,
198 .shutdown = ohci_hcd_tilegx_drv_shutdown,
199 .driver = {
200 .name = "tilegx-ohci",
201 .owner = THIS_MODULE,
202 }
203};
204
205MODULE_ALIAS("platform:tilegx-ohci");