Merge branch 'fix/hda' into for-linus
[linux-2.6] / drivers / usb / host / ohci-pnx8550.c
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 #ifdef  CONFIG_PM
205         .bus_suspend =          ohci_bus_suspend,
206         .bus_resume =           ohci_bus_resume,
207 #endif
208         .start_port_reset =     ohci_start_port_reset,
209 };
210
211 /*-------------------------------------------------------------------------*/
212
213 static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev)
214 {
215         int ret;
216
217         if (usb_disabled())
218                 return -ENODEV;
219
220         ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);
221         return ret;
222 }
223
224 static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev)
225 {
226         struct usb_hcd *hcd = platform_get_drvdata(pdev);
227
228         usb_hcd_pnx8550_remove(hcd, pdev);
229         return 0;
230 }
231
232 MODULE_ALIAS("platform:pnx8550-ohci");
233
234 static struct platform_driver ohci_hcd_pnx8550_driver = {
235         .driver = {
236                 .name   = "pnx8550-ohci",
237                 .owner  = THIS_MODULE,
238         },
239         .probe          = ohci_hcd_pnx8550_drv_probe,
240         .remove         = ohci_hcd_pnx8550_drv_remove,
241 };
242