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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 2006 Sylvain Munaut <tnt@246tNt.com>
8 *
9 * Bus glue for OHCI HC on the of_platform bus
10 *
11 * Modified for of_platform bus from ohci-sa1111.c
12 *
13 * This file is licenced under the GPL.
14 */
15
16#include <linux/signal.h>
17#include <linux/of_platform.h>
18
19#include <asm/prom.h>
20
21
22static int __devinit
23ohci_ppc_of_start(struct usb_hcd *hcd)
24{
25 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
26 int ret;
27
28 if ((ret = ohci_init(ohci)) < 0)
29 return ret;
30
31 if ((ret = ohci_run(ohci)) < 0) {
32 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
33 ohci_stop(hcd);
34 return ret;
35 }
36
37 return 0;
38}
39
40static const struct hc_driver ohci_ppc_of_hc_driver = {
41 .description = hcd_name,
42 .product_desc = "OF OHCI",
43 .hcd_priv_size = sizeof(struct ohci_hcd),
44
45 /*
46 * generic hardware linkage
47 */
48 .irq = ohci_irq,
49 .flags = HCD_USB11 | HCD_MEMORY,
50
51 /*
52 * basic lifecycle operations
53 */
54 .start = ohci_ppc_of_start,
55 .stop = ohci_stop,
56 .shutdown = ohci_shutdown,
57
58 /*
59 * managing i/o requests and associated device resources
60 */
61 .urb_enqueue = ohci_urb_enqueue,
62 .urb_dequeue = ohci_urb_dequeue,
63 .endpoint_disable = ohci_endpoint_disable,
64
65 /*
66 * scheduling support
67 */
68 .get_frame_number = ohci_get_frame,
69
70 /*
71 * root hub support
72 */
73 .hub_status_data = ohci_hub_status_data,
74 .hub_control = ohci_hub_control,
75#ifdef CONFIG_PM
76 .bus_suspend = ohci_bus_suspend,
77 .bus_resume = ohci_bus_resume,
78#endif
79 .start_port_reset = ohci_start_port_reset,
80};
81
82
83static int __devinit ohci_hcd_ppc_of_probe(struct platform_device *op)
84{
85 struct device_node *dn = op->dev.of_node;
86 struct usb_hcd *hcd;
87 struct ohci_hcd *ohci;
88 struct resource res;
89 int irq;
90
91 int rv;
92 int is_bigendian;
93 struct device_node *np;
94
95 if (usb_disabled())
96 return -ENODEV;
97
98 is_bigendian =
99 of_device_is_compatible(dn, "ohci-bigendian") ||
100 of_device_is_compatible(dn, "ohci-be");
101
102 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
103
104 rv = of_address_to_resource(dn, 0, &res);
105 if (rv)
106 return rv;
107
108 hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
109 if (!hcd)
110 return -ENOMEM;
111
112 hcd->rsrc_start = res.start;
113 hcd->rsrc_len = resource_size(&res);
114
115 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
116 printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
117 rv = -EBUSY;
118 goto err_rmr;
119 }
120
121 irq = irq_of_parse_and_map(dn, 0);
122 if (irq == NO_IRQ) {
123 printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
124 rv = -EBUSY;
125 goto err_irq;
126 }
127
128 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
129 if (!hcd->regs) {
130 printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
131 rv = -ENOMEM;
132 goto err_ioremap;
133 }
134
135 ohci = hcd_to_ohci(hcd);
136 if (is_bigendian) {
137 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
138 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
139 ohci->flags |= OHCI_QUIRK_FRAME_NO;
140 if (of_device_is_compatible(dn, "mpc5200-ohci"))
141 ohci->flags |= OHCI_QUIRK_FRAME_NO;
142 }
143
144 ohci_hcd_init(ohci);
145
146 rv = usb_add_hcd(hcd, irq, IRQF_DISABLED);
147 if (rv == 0)
148 return 0;
149
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
171 pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
172 }
173
174 iounmap(hcd->regs);
175err_ioremap:
176 irq_dispose_mapping(irq);
177err_irq:
178 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
179err_rmr:
180 usb_put_hcd(hcd);
181
182 return rv;
183}
184
185static int ohci_hcd_ppc_of_remove(struct platform_device *op)
186{
187 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
188 dev_set_drvdata(&op->dev, NULL);
189
190 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
191
192 usb_remove_hcd(hcd);
193
194 iounmap(hcd->regs);
195 irq_dispose_mapping(hcd->irq);
196 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
197
198 usb_put_hcd(hcd);
199
200 return 0;
201}
202
203static void ohci_hcd_ppc_of_shutdown(struct platform_device *op)
204{
205 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
206
207 if (hcd->driver->shutdown)
208 hcd->driver->shutdown(hcd);
209}
210
211
212static const struct of_device_id ohci_hcd_ppc_of_match[] = {
213#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
214 {
215 .name = "usb",
216 .compatible = "ohci-bigendian",
217 },
218 {
219 .name = "usb",
220 .compatible = "ohci-be",
221 },
222#endif
223#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
224 {
225 .name = "usb",
226 .compatible = "ohci-littledian",
227 },
228 {
229 .name = "usb",
230 .compatible = "ohci-le",
231 },
232#endif
233 {},
234};
235MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
236
237#if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
238 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
239#error "No endianess selected for ppc-of-ohci"
240#endif
241
242
243static struct platform_driver ohci_hcd_ppc_of_driver = {
244 .probe = ohci_hcd_ppc_of_probe,
245 .remove = ohci_hcd_ppc_of_remove,
246 .shutdown = ohci_hcd_ppc_of_shutdown,
247 .driver = {
248 .name = "ppc-of-ohci",
249 .owner = THIS_MODULE,
250 .of_match_table = ohci_hcd_ppc_of_match,
251 },
252};
253
1// SPDX-License-Identifier: GPL-1.0+
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>
18#include <linux/of_address.h>
19#include <linux/of_irq.h>
20#include <linux/of_platform.h>
21
22#include <asm/prom.h>
23
24
25static int
26ohci_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) {
35 dev_err(hcd->self.controller, "can't start %s\n",
36 hcd->self.bus_name);
37 ohci_stop(hcd);
38 return ret;
39 }
40
41 return 0;
42}
43
44static 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,
53 .flags = HCD_USB11 | HCD_DMA | HCD_MEMORY,
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,
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
87static int ohci_hcd_ppc_of_probe(struct platform_device *op)
88{
89 struct device_node *dn = op->dev.of_node;
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;
97 struct device_node *np;
98
99 if (usb_disabled())
100 return -ENODEV;
101
102 is_bigendian =
103 of_device_is_compatible(dn, "ohci-bigendian") ||
104 of_device_is_compatible(dn, "ohci-be");
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;
117 hcd->rsrc_len = resource_size(&res);
118
119 hcd->regs = devm_ioremap_resource(&op->dev, &res);
120 if (IS_ERR(hcd->regs)) {
121 rv = PTR_ERR(hcd->regs);
122 goto err_rmr;
123 }
124
125 irq = irq_of_parse_and_map(dn, 0);
126 if (irq == NO_IRQ) {
127 dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",
128 __FILE__);
129 rv = -EBUSY;
130 goto err_rmr;
131 }
132
133 ohci = hcd_to_ohci(hcd);
134 if (is_bigendian) {
135 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
136 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
137 ohci->flags |= OHCI_QUIRK_FRAME_NO;
138 if (of_device_is_compatible(dn, "mpc5200-ohci"))
139 ohci->flags |= OHCI_QUIRK_FRAME_NO;
140 }
141
142 ohci_hcd_init(ohci);
143
144 rv = usb_add_hcd(hcd, irq, 0);
145 if (rv == 0) {
146 device_wakeup_enable(hcd->self.controller);
147 return 0;
148 }
149
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
171 pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
172 }
173
174 irq_dispose_mapping(irq);
175err_rmr:
176 usb_put_hcd(hcd);
177
178 return rv;
179}
180
181static int ohci_hcd_ppc_of_remove(struct platform_device *op)
182{
183 struct usb_hcd *hcd = platform_get_drvdata(op);
184
185 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
186
187 usb_remove_hcd(hcd);
188
189 irq_dispose_mapping(hcd->irq);
190
191 usb_put_hcd(hcd);
192
193 return 0;
194}
195
196static const struct of_device_id ohci_hcd_ppc_of_match[] = {
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};
219MODULE_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)
223#error "No endianness selected for ppc-of-ohci"
224#endif
225
226
227static struct platform_driver ohci_hcd_ppc_of_driver = {
228 .probe = ohci_hcd_ppc_of_probe,
229 .remove = ohci_hcd_ppc_of_remove,
230 .shutdown = usb_hcd_platform_shutdown,
231 .driver = {
232 .name = "ppc-of-ohci",
233 .of_match_table = ohci_hcd_ppc_of_match,
234 },
235};
236