1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 * (C) Copyright 2002 Hewlett-Packard Company
7 * (C) Copyright 2003-2005 MontaVista Software Inc.
8 *
9 * Bus Glue for PPC On-Chip OHCI driver
10 * Tested on Freescale MPC5200 and IBM STB04xxx
11 *
12 * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c
13 *
14 * This file is licenced under the GPL.
15 */
16
17 #include <linux/platform_device.h>
18 #include <linux/signal.h>
19
20 /* configure so an HC device and id are always provided */
21 /* always called with process context; sleeping is OK */
22
23 /**
24 * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
25 * Context: !in_interrupt()
26 *
27 * Allocates basic resources for this USB host controller.
28 *
29 * Store this function in the HCD's struct pci_driver as probe().
30 */
usb_hcd_ppc_soc_probe(const struct hc_driver * driver,struct platform_device * pdev)31 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
32 struct platform_device *pdev)
33 {
34 int retval;
35 struct usb_hcd *hcd;
36 struct ohci_hcd *ohci;
37 struct resource *res;
38 int irq;
39
40 pr_debug("initializing PPC-SOC USB Controller\n");
41
42 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
43 if (!res) {
44 pr_debug("%s: no irq\n", __FILE__);
45 return -ENODEV;
46 }
47 irq = res->start;
48
49 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
50 if (!res) {
51 pr_debug("%s: no reg addr\n", __FILE__);
52 return -ENODEV;
53 }
54
55 hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
56 if (!hcd)
57 return -ENOMEM;
58 hcd->rsrc_start = res->start;
59 hcd->rsrc_len = resource_size(res);
60
61 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
62 pr_debug("%s: request_mem_region failed\n", __FILE__);
63 retval = -EBUSY;
64 goto err1;
65 }
66
67 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
68 if (!hcd->regs) {
69 pr_debug("%s: ioremap failed\n", __FILE__);
70 retval = -ENOMEM;
71 goto err2;
72 }
73
74 ohci = hcd_to_ohci(hcd);
75 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
76
77 #ifdef CONFIG_PPC_MPC52xx
78 /* MPC52xx doesn't need frame_no shift */
79 ohci->flags |= OHCI_QUIRK_FRAME_NO;
80 #endif
81 ohci_hcd_init(ohci);
82
83 retval = usb_add_hcd(hcd, irq, 0);
84 if (retval == 0)
85 return retval;
86
87 pr_debug("Removing PPC-SOC USB Controller\n");
88
89 iounmap(hcd->regs);
90 err2:
91 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
92 err1:
93 usb_put_hcd(hcd);
94 return retval;
95 }
96
97
98 /* may be called without controller electrically present */
99 /* may be called with controller, bus, and devices active */
100
101 /**
102 * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
103 * @pdev: USB Host Controller being removed
104 * Context: !in_interrupt()
105 *
106 * Reverses the effect of usb_hcd_ppc_soc_probe().
107 * It is always called from a thread
108 * context, normally "rmmod", "apmd", or something similar.
109 *
110 */
usb_hcd_ppc_soc_remove(struct usb_hcd * hcd,struct platform_device * pdev)111 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
112 struct platform_device *pdev)
113 {
114 usb_remove_hcd(hcd);
115
116 pr_debug("stopping PPC-SOC USB Controller\n");
117
118 iounmap(hcd->regs);
119 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
120 usb_put_hcd(hcd);
121 }
122
123 static int __devinit
ohci_ppc_soc_start(struct usb_hcd * hcd)124 ohci_ppc_soc_start(struct usb_hcd *hcd)
125 {
126 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
127 int ret;
128
129 if ((ret = ohci_init(ohci)) < 0)
130 return ret;
131
132 if ((ret = ohci_run(ohci)) < 0) {
133 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
134 ohci_stop(hcd);
135 return ret;
136 }
137
138 return 0;
139 }
140
141 static const struct hc_driver ohci_ppc_soc_hc_driver = {
142 .description = hcd_name,
143 .hcd_priv_size = sizeof(struct ohci_hcd),
144
145 /*
146 * generic hardware linkage
147 */
148 .irq = ohci_irq,
149 .flags = HCD_USB11 | HCD_MEMORY,
150
151 /*
152 * basic lifecycle operations
153 */
154 .start = ohci_ppc_soc_start,
155 .stop = ohci_stop,
156 .shutdown = ohci_shutdown,
157
158 /*
159 * managing i/o requests and associated device resources
160 */
161 .urb_enqueue = ohci_urb_enqueue,
162 .urb_dequeue = ohci_urb_dequeue,
163 .endpoint_disable = ohci_endpoint_disable,
164
165 /*
166 * scheduling support
167 */
168 .get_frame_number = ohci_get_frame,
169
170 /*
171 * root hub support
172 */
173 .hub_status_data = ohci_hub_status_data,
174 .hub_control = ohci_hub_control,
175 #ifdef CONFIG_PM
176 .bus_suspend = ohci_bus_suspend,
177 .bus_resume = ohci_bus_resume,
178 #endif
179 .start_port_reset = ohci_start_port_reset,
180 };
181
ohci_hcd_ppc_soc_drv_probe(struct platform_device * pdev)182 static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
183 {
184 int ret;
185
186 if (usb_disabled())
187 return -ENODEV;
188
189 ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
190 return ret;
191 }
192
ohci_hcd_ppc_soc_drv_remove(struct platform_device * pdev)193 static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
194 {
195 struct usb_hcd *hcd = platform_get_drvdata(pdev);
196
197 usb_hcd_ppc_soc_remove(hcd, pdev);
198 return 0;
199 }
200
201 static struct platform_driver ohci_hcd_ppc_soc_driver = {
202 .probe = ohci_hcd_ppc_soc_drv_probe,
203 .remove = ohci_hcd_ppc_soc_drv_remove,
204 .shutdown = usb_hcd_platform_shutdown,
205 #ifdef CONFIG_PM
206 /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/
207 /*.resume = ohci_hcd_ppc_soc_drv_resume,*/
208 #endif
209 .driver = {
210 .name = "ppc-soc-ohci",
211 .owner = THIS_MODULE,
212 },
213 };
214
215 MODULE_ALIAS("platform:ppc-soc-ohci");
216