Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-1.0+ |
495a678f SM |
2 | /* |
3 | * OHCI HCD (Host Controller Driver) for USB. | |
4 | * | |
5 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> | |
6 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> | |
7 | * (C) Copyright 2002 Hewlett-Packard Company | |
8 | * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com> | |
9 | * | |
10 | * Bus glue for OHCI HC on the of_platform bus | |
11 | * | |
12 | * Modified for of_platform bus from ohci-sa1111.c | |
13 | * | |
14 | * This file is licenced under the GPL. | |
15 | */ | |
16 | ||
17 | #include <linux/signal.h> | |
5af50730 RH |
18 | #include <linux/of_address.h> |
19 | #include <linux/of_irq.h> | |
554cc171 | 20 | #include <linux/of_platform.h> |
495a678f | 21 | |
495a678f SM |
22 | #include <asm/prom.h> |
23 | ||
24 | ||
41ac7b3a | 25 | static int |
495a678f SM |
26 | ohci_ppc_of_start(struct usb_hcd *hcd) |
27 | { | |
28 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
29 | int ret; | |
30 | ||
31 | if ((ret = ohci_init(ohci)) < 0) | |
32 | return ret; | |
33 | ||
34 | if ((ret = ohci_run(ohci)) < 0) { | |
1d55b768 GKH |
35 | dev_err(hcd->self.controller, "can't start %s\n", |
36 | hcd->self.bus_name); | |
495a678f SM |
37 | ohci_stop(hcd); |
38 | return ret; | |
39 | } | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static const struct hc_driver ohci_ppc_of_hc_driver = { | |
45 | .description = hcd_name, | |
46 | .product_desc = "OF OHCI", | |
47 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
48 | ||
49 | /* | |
50 | * generic hardware linkage | |
51 | */ | |
52 | .irq = ohci_irq, | |
7b81cb6b | 53 | .flags = HCD_USB11 | HCD_DMA | HCD_MEMORY, |
495a678f SM |
54 | |
55 | /* | |
56 | * basic lifecycle operations | |
57 | */ | |
58 | .start = ohci_ppc_of_start, | |
59 | .stop = ohci_stop, | |
60 | .shutdown = ohci_shutdown, | |
61 | ||
62 | /* | |
63 | * managing i/o requests and associated device resources | |
64 | */ | |
65 | .urb_enqueue = ohci_urb_enqueue, | |
66 | .urb_dequeue = ohci_urb_dequeue, | |
67 | .endpoint_disable = ohci_endpoint_disable, | |
68 | ||
69 | /* | |
70 | * scheduling support | |
71 | */ | |
72 | .get_frame_number = ohci_get_frame, | |
73 | ||
74 | /* | |
75 | * root hub support | |
76 | */ | |
77 | .hub_status_data = ohci_hub_status_data, | |
78 | .hub_control = ohci_hub_control, | |
495a678f SM |
79 | #ifdef CONFIG_PM |
80 | .bus_suspend = ohci_bus_suspend, | |
81 | .bus_resume = ohci_bus_resume, | |
82 | #endif | |
83 | .start_port_reset = ohci_start_port_reset, | |
84 | }; | |
85 | ||
86 | ||
41ac7b3a | 87 | static int ohci_hcd_ppc_of_probe(struct platform_device *op) |
495a678f | 88 | { |
61c7a080 | 89 | struct device_node *dn = op->dev.of_node; |
495a678f SM |
90 | struct usb_hcd *hcd; |
91 | struct ohci_hcd *ohci; | |
92 | struct resource res; | |
93 | int irq; | |
94 | ||
95 | int rv; | |
96 | int is_bigendian; | |
796bcae7 | 97 | struct device_node *np; |
495a678f SM |
98 | |
99 | if (usb_disabled()) | |
100 | return -ENODEV; | |
101 | ||
102 | is_bigendian = | |
55b61fec SR |
103 | of_device_is_compatible(dn, "ohci-bigendian") || |
104 | of_device_is_compatible(dn, "ohci-be"); | |
495a678f SM |
105 | |
106 | dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); | |
107 | ||
108 | rv = of_address_to_resource(dn, 0, &res); | |
109 | if (rv) | |
110 | return rv; | |
111 | ||
112 | hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); | |
113 | if (!hcd) | |
114 | return -ENOMEM; | |
115 | ||
116 | hcd->rsrc_start = res.start; | |
28f65c11 | 117 | hcd->rsrc_len = resource_size(&res); |
495a678f | 118 | |
3e2e714e JH |
119 | hcd->regs = devm_ioremap_resource(&op->dev, &res); |
120 | if (IS_ERR(hcd->regs)) { | |
121 | rv = PTR_ERR(hcd->regs); | |
495a678f SM |
122 | goto err_rmr; |
123 | } | |
124 | ||
125 | irq = irq_of_parse_and_map(dn, 0); | |
126 | if (irq == NO_IRQ) { | |
63c9b9d3 JH |
127 | dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", |
128 | __FILE__); | |
495a678f | 129 | rv = -EBUSY; |
3e2e714e | 130 | goto err_rmr; |
495a678f SM |
131 | } |
132 | ||
133 | ohci = hcd_to_ohci(hcd); | |
4f45426c | 134 | if (is_bigendian) { |
495a678f | 135 | ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; |
66ffbe49 GL |
136 | if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) |
137 | ohci->flags |= OHCI_QUIRK_FRAME_NO; | |
4f45426c VB |
138 | if (of_device_is_compatible(dn, "mpc5200-ohci")) |
139 | ohci->flags |= OHCI_QUIRK_FRAME_NO; | |
140 | } | |
495a678f SM |
141 | |
142 | ohci_hcd_init(ohci); | |
143 | ||
b5dd18d8 | 144 | rv = usb_add_hcd(hcd, irq, 0); |
3c9740a1 PC |
145 | if (rv == 0) { |
146 | device_wakeup_enable(hcd->self.controller); | |
495a678f | 147 | return 0; |
3c9740a1 | 148 | } |
495a678f | 149 | |
796bcae7 VB |
150 | /* by now, 440epx is known to show usb_23 erratum */ |
151 | np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); | |
152 | ||
153 | /* Work around - At this point ohci_run has executed, the | |
154 | * controller is running, everything, the root ports, etc., is | |
155 | * set up. If the ehci driver is loaded, put the ohci core in | |
156 | * the suspended state. The ehci driver will bring it out of | |
157 | * suspended state when / if a non-high speed USB device is | |
158 | * attached to the USB Host port. If the ehci driver is not | |
159 | * loaded, do nothing. request_mem_region is used to test if | |
160 | * the ehci driver is loaded. | |
161 | */ | |
162 | if (np != NULL) { | |
163 | if (!of_address_to_resource(np, 0, &res)) { | |
164 | if (!request_mem_region(res.start, 0x4, hcd_name)) { | |
165 | writel_be((readl_be(&ohci->regs->control) | | |
166 | OHCI_USB_SUSPEND), &ohci->regs->control); | |
167 | (void) readl_be(&ohci->regs->control); | |
168 | } else | |
169 | release_mem_region(res.start, 0x4); | |
170 | } else | |
f45ba776 | 171 | pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__); |
796bcae7 VB |
172 | } |
173 | ||
495a678f | 174 | irq_dispose_mapping(irq); |
495a678f SM |
175 | err_rmr: |
176 | usb_put_hcd(hcd); | |
177 | ||
178 | return rv; | |
179 | } | |
180 | ||
2dc11581 | 181 | static int ohci_hcd_ppc_of_remove(struct platform_device *op) |
495a678f | 182 | { |
477527ba | 183 | struct usb_hcd *hcd = platform_get_drvdata(op); |
495a678f SM |
184 | |
185 | dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); | |
186 | ||
187 | usb_remove_hcd(hcd); | |
188 | ||
495a678f | 189 | irq_dispose_mapping(hcd->irq); |
495a678f SM |
190 | |
191 | usb_put_hcd(hcd); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
c4386ad0 | 196 | static const struct of_device_id ohci_hcd_ppc_of_match[] = { |
495a678f SM |
197 | #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE |
198 | { | |
199 | .name = "usb", | |
200 | .compatible = "ohci-bigendian", | |
201 | }, | |
202 | { | |
203 | .name = "usb", | |
204 | .compatible = "ohci-be", | |
205 | }, | |
206 | #endif | |
207 | #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE | |
208 | { | |
209 | .name = "usb", | |
210 | .compatible = "ohci-littledian", | |
211 | }, | |
212 | { | |
213 | .name = "usb", | |
214 | .compatible = "ohci-le", | |
215 | }, | |
216 | #endif | |
217 | {}, | |
218 | }; | |
219 | MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); | |
220 | ||
221 | #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ | |
222 | !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) | |
1c1301dd | 223 | #error "No endianness selected for ppc-of-ohci" |
495a678f SM |
224 | #endif |
225 | ||
226 | ||
d35fb641 | 227 | static struct platform_driver ohci_hcd_ppc_of_driver = { |
495a678f SM |
228 | .probe = ohci_hcd_ppc_of_probe, |
229 | .remove = ohci_hcd_ppc_of_remove, | |
aaf6b52d | 230 | .shutdown = usb_hcd_platform_shutdown, |
4018294b GL |
231 | .driver = { |
232 | .name = "ppc-of-ohci", | |
4018294b | 233 | .of_match_table = ohci_hcd_ppc_of_match, |
495a678f SM |
234 | }, |
235 | }; | |
236 |