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 2005 Embedded Alley Solutions, Inc.
8 *
9 * Bus Glue for PNX8550
10 *
11 * Written by Christopher Hoover <ch@hpl.hp.com>
12 * Based on fragments of previous driver by Russell King et al.
13 *
14 * Modified for LH7A404 from ohci-sa1111.c
15 * by Durgesh Pattamatta <pattamattad@sharpsec.com>
16 *
17 * Modified for PNX8550 from ohci-sa1111.c and sa-omap.c
18 * by Vitaly Wool <vitalywool@gmail.com>
19 *
20 * This file is licenced under the GPL.
21 */
22
23 #include <linux/device.h>
24 #include <linux/platform_device.h>
25 #include <asm/mach-pnx8550/usb.h>
26 #include <asm/mach-pnx8550/int.h>
27 #include <asm/mach-pnx8550/pci.h>
28
29 #ifndef CONFIG_PNX8550
30 #error "This file is PNX8550 bus glue. CONFIG_PNX8550 must be defined."
31 #endif
32
33 extern int usb_disabled(void);
34
35 /*-------------------------------------------------------------------------*/
36
37 static void pnx8550_start_hc(struct platform_device *dev)
38 {
39 /*
40 * Set register CLK48CTL to enable and 48MHz
41 */
42 outl(0x00000003, PCI_BASE | 0x0004770c);
43
44 /*
45 * Set register CLK12CTL to enable and 48MHz
46 */
47 outl(0x00000003, PCI_BASE | 0x00047710);
48
49 udelay(100);
50 }
51
52 static void pnx8550_stop_hc(struct platform_device *dev)
53 {
54 udelay(10);
55 }
56
57
58 /*-------------------------------------------------------------------------*/
59
60 /* configure so an HC device and id are always provided */
61 /* always called with process context; sleeping is OK */
62
63
64 /**
65 * usb_hcd_pnx8550_probe - initialize pnx8550-based HCDs
66 * Context: !in_interrupt()
67 *
68 * Allocates basic resources for this USB host controller, and
69 * then invokes the start() method for the HCD associated with it
70 * through the hotplug entry's driver_data.
71 *
72 */
73 int usb_hcd_pnx8550_probe (const struct hc_driver *driver,
74 struct platform_device *dev)
75 {
76 int retval;
77 struct usb_hcd *hcd;
78
79 if (dev->resource[0].flags != IORESOURCE_MEM ||
80 dev->resource[1].flags != IORESOURCE_IRQ) {
81 dev_err (&dev->dev,"invalid resource type\n");
82 return -ENOMEM;
83 }
84
85 hcd = usb_create_hcd (driver, &dev->dev, "pnx8550");
86 if (!hcd)
87 return -ENOMEM;
88 hcd->rsrc_start = dev->resource[0].start;
89 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
90
91 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
92 dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] "
93 "failed\n", hcd->rsrc_start, hcd->rsrc_len);
94 retval = -EBUSY;
95 goto err1;
96 }
97
98 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
99 if (!hcd->regs) {
100 dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n",
101 hcd->rsrc_start, hcd->rsrc_len);
102 retval = -ENOMEM;
103 goto err2;
104 }
105
106 pnx8550_start_hc(dev);
107
108 ohci_hcd_init(hcd_to_ohci(hcd));
109
110 retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
111 if (retval == 0)
112 return retval;
113
114 pnx8550_stop_hc(dev);
115 iounmap(hcd->regs);
116 err2:
117 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
118 err1:
119 usb_put_hcd(hcd);
120 return retval;
121 }
122
123
124 /* may be called without controller electrically present */
125 /* may be called with controller, bus, and devices active */
126
127 /**
128 * usb_hcd_pnx8550_remove - shutdown processing for pnx8550-based HCDs
129 * @dev: USB Host Controller being removed
130 * Context: !in_interrupt()
131 *
132 * Reverses the effect of usb_hcd_pnx8550_probe(), first invoking
133 * the HCD's stop() method. It is always called from a thread
134 * context, normally "rmmod", "apmd", or something similar.
135 *
136 */
137 void usb_hcd_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev)
138 {
139 usb_remove_hcd(hcd);
140 pnx8550_stop_hc(dev);
141 iounmap(hcd->regs);
142 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
143 usb_put_hcd(hcd);
144 }
145
146 /*-------------------------------------------------------------------------*/
147
148 static int __devinit
149 ohci_pnx8550_start (struct usb_hcd *hcd)
150 {
151 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
152 int ret;
153
154 ohci_dbg (ohci, "ohci_pnx8550_start, ohci:%p", ohci);
155
156 if ((ret = ohci_init(ohci)) < 0)
157 return ret;
158
159 if ((ret = ohci_run (ohci)) < 0) {
160 err ("can't start %s", hcd->self.bus_name);
161 ohci_stop (hcd);
162 return ret;
163 }
164
165 return 0;
166 }
167
168 /*-------------------------------------------------------------------------*/
169
170 static const struct hc_driver ohci_pnx8550_hc_driver = {
171 .description = hcd_name,
172 .product_desc = "PNX8550 OHCI",
173 .hcd_priv_size = sizeof(struct ohci_hcd),
174
175 /*
176 * generic hardware linkage
177 */
178 .irq = ohci_irq,
179 .flags = HCD_USB11 | HCD_MEMORY,
180
181 /*
182 * basic lifecycle operations
183 */
184 .start = ohci_pnx8550_start,
185 .stop = ohci_stop,
186
187 /*
188 * managing i/o requests and associated device resources
189 */
190 .urb_enqueue = ohci_urb_enqueue,
191 .urb_dequeue = ohci_urb_dequeue,
192 .endpoint_disable = ohci_endpoint_disable,
193
194 /*
195 * scheduling support
196 */
197 .get_frame_number = ohci_get_frame,
198
199 /*
200 * root hub support
201 */
202 .hub_status_data = ohci_hub_status_data,
203 .hub_control = ohci_hub_control,
204 .hub_irq_enable = ohci_rhsc_enable,
205 #ifdef CONFIG_PM
206 .bus_suspend = ohci_bus_suspend,
207 .bus_resume = ohci_bus_resume,
208 #endif
209 .start_port_reset = ohci_start_port_reset,
210 };
211
212 /*-------------------------------------------------------------------------*/
213
214 static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev)
215 {
216 int ret;
217
218 if (usb_disabled())
219 return -ENODEV;
220
221 ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);
222 return ret;
223 }
224
225 static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev)
226 {
227 struct usb_hcd *hcd = platform_get_drvdata(pdev);
228
229 usb_hcd_pnx8550_remove(hcd, pdev);
230 return 0;
231 }
232
233 MODULE_ALIAS("platform:pnx8550-ohci");
234
235 static struct platform_driver ohci_hcd_pnx8550_driver = {
236 .driver = {
237 .name = "pnx8550-ohci",
238 .owner = THIS_MODULE,
239 },
240 .probe = ohci_hcd_pnx8550_drv_probe,
241 .remove = ohci_hcd_pnx8550_drv_remove,
242 };
243
244
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