Commit | Line | Data |
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5151d040 VW |
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 | ||
38515e90 | 110 | retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); |
5151d040 VW |
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, | |
5151d040 VW |
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 | ||
f4fce61d | 232 | MODULE_ALIAS("platform:pnx8550-ohci"); |
5151d040 VW |
233 | |
234 | static struct platform_driver ohci_hcd_pnx8550_driver = { | |
235 | .driver = { | |
f4fce61d KS |
236 | .name = "pnx8550-ohci", |
237 | .owner = THIS_MODULE, | |
5151d040 VW |
238 | }, |
239 | .probe = ohci_hcd_pnx8550_drv_probe, | |
240 | .remove = ohci_hcd_pnx8550_drv_remove, | |
241 | }; | |
242 |