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