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1/*
2 * Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
3 *
4 * GRUSBHC is typically found on LEON/GRLIB SoCs
5 *
6 * (c) Jan Andersson <jan@gaisler.com>
7 *
8 * Based on ehci-ppc-of.c which is:
9 * (c) Valentine Barshak <vbarshak@ru.mvista.com>
10 * and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
11 * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
20 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 * for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software Foundation,
25 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28
29#include <linux/signal.h>
30
31#include <linux/of_irq.h>
32#include <linux/of_address.h>
33#include <linux/of_platform.h>
34
35#define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
36
37/* called during probe() after chip reset completes */
38static int ehci_grlib_setup(struct usb_hcd *hcd)
39{
40 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
41 int retval;
42
43 retval = ehci_halt(ehci);
44 if (retval)
45 return retval;
46
47 retval = ehci_init(hcd);
48 if (retval)
49 return retval;
50
51 ehci->sbrn = 0x20;
52 ehci_port_power(ehci, 1);
53
54 return ehci_reset(ehci);
55}
56
57
58static const struct hc_driver ehci_grlib_hc_driver = {
59 .description = hcd_name,
60 .product_desc = "GRLIB GRUSBHC EHCI",
61 .hcd_priv_size = sizeof(struct ehci_hcd),
62
63 /*
64 * generic hardware linkage
65 */
66 .irq = ehci_irq,
67 .flags = HCD_MEMORY | HCD_USB2,
68
69 /*
70 * basic lifecycle operations
71 */
72 .reset = ehci_grlib_setup,
73 .start = ehci_run,
74 .stop = ehci_stop,
75 .shutdown = ehci_shutdown,
76
77 /*
78 * managing i/o requests and associated device resources
79 */
80 .urb_enqueue = ehci_urb_enqueue,
81 .urb_dequeue = ehci_urb_dequeue,
82 .endpoint_disable = ehci_endpoint_disable,
83 .endpoint_reset = ehci_endpoint_reset,
84
85 /*
86 * scheduling support
87 */
88 .get_frame_number = ehci_get_frame,
89
90 /*
91 * root hub support
92 */
93 .hub_status_data = ehci_hub_status_data,
94 .hub_control = ehci_hub_control,
95#ifdef CONFIG_PM
96 .bus_suspend = ehci_bus_suspend,
97 .bus_resume = ehci_bus_resume,
98#endif
99 .relinquish_port = ehci_relinquish_port,
100 .port_handed_over = ehci_port_handed_over,
101
102 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
103};
104
105
106static int __devinit ehci_hcd_grlib_probe(struct platform_device *op)
107{
108 struct device_node *dn = op->dev.of_node;
109 struct usb_hcd *hcd;
110 struct ehci_hcd *ehci = NULL;
111 struct resource res;
112 u32 hc_capbase;
113 int irq;
114 int rv;
115
116 if (usb_disabled())
117 return -ENODEV;
118
119 dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
120
121 rv = of_address_to_resource(dn, 0, &res);
122 if (rv)
123 return rv;
124
125 /* usb_create_hcd requires dma_mask != NULL */
126 op->dev.dma_mask = &op->dev.coherent_dma_mask;
127 hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
128 "GRUSBHC EHCI USB");
129 if (!hcd)
130 return -ENOMEM;
131
132 hcd->rsrc_start = res.start;
133 hcd->rsrc_len = resource_size(&res);
134
135 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
136 printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
137 rv = -EBUSY;
138 goto err_rmr;
139 }
140
141 irq = irq_of_parse_and_map(dn, 0);
142 if (irq == NO_IRQ) {
143 printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
144 rv = -EBUSY;
145 goto err_irq;
146 }
147
148 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
149 if (!hcd->regs) {
150 printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
151 rv = -ENOMEM;
152 goto err_ioremap;
153 }
154
155 ehci = hcd_to_ehci(hcd);
156
157 ehci->caps = hcd->regs;
158
159 /* determine endianness of this implementation */
160 hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
161 if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
162 ehci->big_endian_mmio = 1;
163 ehci->big_endian_desc = 1;
164 ehci->big_endian_capbase = 1;
165 }
166
167 ehci->regs = hcd->regs +
168 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
169
170 /* cache this readonly data; minimize chip reads */
171 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
172
173 rv = usb_add_hcd(hcd, irq, 0);
174 if (rv)
175 goto err_ehci;
176
177 return 0;
178
179err_ehci:
180 iounmap(hcd->regs);
181err_ioremap:
182 irq_dispose_mapping(irq);
183err_irq:
184 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
185err_rmr:
186 usb_put_hcd(hcd);
187
188 return rv;
189}
190
191
192static int ehci_hcd_grlib_remove(struct platform_device *op)
193{
194 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
195
196 dev_set_drvdata(&op->dev, NULL);
197
198 dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
199
200 usb_remove_hcd(hcd);
201
202 iounmap(hcd->regs);
203 irq_dispose_mapping(hcd->irq);
204 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
205
206 usb_put_hcd(hcd);
207
208 return 0;
209}
210
211
212static void ehci_hcd_grlib_shutdown(struct platform_device *op)
213{
214 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
215
216 if (hcd->driver->shutdown)
217 hcd->driver->shutdown(hcd);
218}
219
220
221static const struct of_device_id ehci_hcd_grlib_of_match[] = {
222 {
223 .name = "GAISLER_EHCI",
224 },
225 {
226 .name = "01_026",
227 },
228 {},
229};
230MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
231
232
233static struct platform_driver ehci_grlib_driver = {
234 .probe = ehci_hcd_grlib_probe,
235 .remove = ehci_hcd_grlib_remove,
236 .shutdown = ehci_hcd_grlib_shutdown,
237 .driver = {
238 .name = "grlib-ehci",
239 .owner = THIS_MODULE,
240 .of_match_table = ehci_hcd_grlib_of_match,
241 },
242};
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
4 *
5 * GRUSBHC is typically found on LEON/GRLIB SoCs
6 *
7 * (c) Jan Andersson <jan@gaisler.com>
8 *
9 * Based on ehci-ppc-of.c which is:
10 * (c) Valentine Barshak <vbarshak@ru.mvista.com>
11 * and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
12 * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
13 */
14
15#include <linux/err.h>
16#include <linux/signal.h>
17
18#include <linux/of_irq.h>
19#include <linux/of_address.h>
20#include <linux/of_platform.h>
21
22#define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
23
24static const struct hc_driver ehci_grlib_hc_driver = {
25 .description = hcd_name,
26 .product_desc = "GRLIB GRUSBHC EHCI",
27 .hcd_priv_size = sizeof(struct ehci_hcd),
28
29 /*
30 * generic hardware linkage
31 */
32 .irq = ehci_irq,
33 .flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
34
35 /*
36 * basic lifecycle operations
37 */
38 .reset = ehci_setup,
39 .start = ehci_run,
40 .stop = ehci_stop,
41 .shutdown = ehci_shutdown,
42
43 /*
44 * managing i/o requests and associated device resources
45 */
46 .urb_enqueue = ehci_urb_enqueue,
47 .urb_dequeue = ehci_urb_dequeue,
48 .endpoint_disable = ehci_endpoint_disable,
49 .endpoint_reset = ehci_endpoint_reset,
50
51 /*
52 * scheduling support
53 */
54 .get_frame_number = ehci_get_frame,
55
56 /*
57 * root hub support
58 */
59 .hub_status_data = ehci_hub_status_data,
60 .hub_control = ehci_hub_control,
61#ifdef CONFIG_PM
62 .bus_suspend = ehci_bus_suspend,
63 .bus_resume = ehci_bus_resume,
64#endif
65 .relinquish_port = ehci_relinquish_port,
66 .port_handed_over = ehci_port_handed_over,
67
68 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
69};
70
71
72static int ehci_hcd_grlib_probe(struct platform_device *op)
73{
74 struct device_node *dn = op->dev.of_node;
75 struct usb_hcd *hcd;
76 struct ehci_hcd *ehci = NULL;
77 struct resource res;
78 u32 hc_capbase;
79 int irq;
80 int rv;
81
82 if (usb_disabled())
83 return -ENODEV;
84
85 dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
86
87 rv = of_address_to_resource(dn, 0, &res);
88 if (rv)
89 return rv;
90
91 /* usb_create_hcd requires dma_mask != NULL */
92 op->dev.dma_mask = &op->dev.coherent_dma_mask;
93 hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
94 "GRUSBHC EHCI USB");
95 if (!hcd)
96 return -ENOMEM;
97
98 hcd->rsrc_start = res.start;
99 hcd->rsrc_len = resource_size(&res);
100
101 irq = irq_of_parse_and_map(dn, 0);
102 if (!irq) {
103 dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",
104 __FILE__);
105 rv = -EBUSY;
106 goto err_irq;
107 }
108
109 hcd->regs = devm_ioremap_resource(&op->dev, &res);
110 if (IS_ERR(hcd->regs)) {
111 rv = PTR_ERR(hcd->regs);
112 goto err_ioremap;
113 }
114
115 ehci = hcd_to_ehci(hcd);
116
117 ehci->caps = hcd->regs;
118
119 /* determine endianness of this implementation */
120 hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
121 if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
122 ehci->big_endian_mmio = 1;
123 ehci->big_endian_desc = 1;
124 ehci->big_endian_capbase = 1;
125 }
126
127 rv = usb_add_hcd(hcd, irq, 0);
128 if (rv)
129 goto err_ioremap;
130
131 device_wakeup_enable(hcd->self.controller);
132 return 0;
133
134err_ioremap:
135 irq_dispose_mapping(irq);
136err_irq:
137 usb_put_hcd(hcd);
138
139 return rv;
140}
141
142
143static void ehci_hcd_grlib_remove(struct platform_device *op)
144{
145 struct usb_hcd *hcd = platform_get_drvdata(op);
146
147 dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
148
149 usb_remove_hcd(hcd);
150
151 irq_dispose_mapping(hcd->irq);
152
153 usb_put_hcd(hcd);
154}
155
156
157static const struct of_device_id ehci_hcd_grlib_of_match[] = {
158 {
159 .name = "GAISLER_EHCI",
160 },
161 {
162 .name = "01_026",
163 },
164 {},
165};
166MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
167
168
169static struct platform_driver ehci_grlib_driver = {
170 .probe = ehci_hcd_grlib_probe,
171 .remove = ehci_hcd_grlib_remove,
172 .shutdown = usb_hcd_platform_shutdown,
173 .driver = {
174 .name = "grlib-ehci",
175 .of_match_table = ehci_hcd_grlib_of_match,
176 },
177};