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1/*
2 * SuperH EHCI host controller driver
3 *
4 * Copyright (C) 2010 Paul Mundt
5 *
6 * Based on ohci-sh.c and ehci-atmel.c.
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/platform_device.h>
13#include <linux/clk.h>
14
15struct ehci_sh_priv {
16 struct clk *iclk, *fclk;
17 struct usb_hcd *hcd;
18};
19
20static int ehci_sh_reset(struct usb_hcd *hcd)
21{
22 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
23 int ret;
24
25 ehci->caps = hcd->regs;
26 ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
27 &ehci->caps->hc_capbase));
28
29 dbg_hcs_params(ehci, "reset");
30 dbg_hcc_params(ehci, "reset");
31
32 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
33
34 ret = ehci_halt(ehci);
35 if (unlikely(ret))
36 return ret;
37
38 ret = ehci_init(hcd);
39 if (unlikely(ret))
40 return ret;
41
42 ehci->sbrn = 0x20;
43
44 ehci_reset(ehci);
45 ehci_port_power(ehci, 0);
46
47 return ret;
48}
49
50static const struct hc_driver ehci_sh_hc_driver = {
51 .description = hcd_name,
52 .product_desc = "SuperH EHCI",
53 .hcd_priv_size = sizeof(struct ehci_hcd),
54
55 /*
56 * generic hardware linkage
57 */
58 .irq = ehci_irq,
59 .flags = HCD_USB2 | HCD_MEMORY,
60
61 /*
62 * basic lifecycle operations
63 */
64 .reset = ehci_sh_reset,
65 .start = ehci_run,
66 .stop = ehci_stop,
67 .shutdown = ehci_shutdown,
68
69 /*
70 * managing i/o requests and associated device resources
71 */
72 .urb_enqueue = ehci_urb_enqueue,
73 .urb_dequeue = ehci_urb_dequeue,
74 .endpoint_disable = ehci_endpoint_disable,
75 .endpoint_reset = ehci_endpoint_reset,
76
77 /*
78 * scheduling support
79 */
80 .get_frame_number = ehci_get_frame,
81
82 /*
83 * root hub support
84 */
85 .hub_status_data = ehci_hub_status_data,
86 .hub_control = ehci_hub_control,
87
88#ifdef CONFIG_PM
89 .bus_suspend = ehci_bus_suspend,
90 .bus_resume = ehci_bus_resume,
91#endif
92
93 .relinquish_port = ehci_relinquish_port,
94 .port_handed_over = ehci_port_handed_over,
95 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
96};
97
98static int ehci_hcd_sh_probe(struct platform_device *pdev)
99{
100 const struct hc_driver *driver = &ehci_sh_hc_driver;
101 struct resource *res;
102 struct ehci_sh_priv *priv;
103 struct usb_hcd *hcd;
104 int irq, ret;
105
106 if (usb_disabled())
107 return -ENODEV;
108
109 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
110 if (!res) {
111 dev_err(&pdev->dev,
112 "Found HC with no register addr. Check %s setup!\n",
113 dev_name(&pdev->dev));
114 ret = -ENODEV;
115 goto fail_create_hcd;
116 }
117
118 irq = platform_get_irq(pdev, 0);
119 if (irq <= 0) {
120 dev_err(&pdev->dev,
121 "Found HC with no IRQ. Check %s setup!\n",
122 dev_name(&pdev->dev));
123 ret = -ENODEV;
124 goto fail_create_hcd;
125 }
126
127 /* initialize hcd */
128 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
129 dev_name(&pdev->dev));
130 if (!hcd) {
131 ret = -ENOMEM;
132 goto fail_create_hcd;
133 }
134
135 hcd->rsrc_start = res->start;
136 hcd->rsrc_len = resource_size(res);
137
138 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
139 driver->description)) {
140 dev_dbg(&pdev->dev, "controller already in use\n");
141 ret = -EBUSY;
142 goto fail_request_resource;
143 }
144
145 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
146 if (hcd->regs == NULL) {
147 dev_dbg(&pdev->dev, "error mapping memory\n");
148 ret = -ENXIO;
149 goto fail_ioremap;
150 }
151
152 priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
153 if (!priv) {
154 dev_dbg(&pdev->dev, "error allocating priv data\n");
155 ret = -ENOMEM;
156 goto fail_alloc;
157 }
158
159 /* These are optional, we don't care if they fail */
160 priv->fclk = clk_get(&pdev->dev, "usb_fck");
161 if (IS_ERR(priv->fclk))
162 priv->fclk = NULL;
163
164 priv->iclk = clk_get(&pdev->dev, "usb_ick");
165 if (IS_ERR(priv->iclk))
166 priv->iclk = NULL;
167
168 clk_enable(priv->fclk);
169 clk_enable(priv->iclk);
170
171 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
172 if (ret != 0) {
173 dev_err(&pdev->dev, "Failed to add hcd");
174 goto fail_add_hcd;
175 }
176
177 priv->hcd = hcd;
178 platform_set_drvdata(pdev, priv);
179
180 return ret;
181
182fail_add_hcd:
183 clk_disable(priv->iclk);
184 clk_disable(priv->fclk);
185
186 clk_put(priv->iclk);
187 clk_put(priv->fclk);
188
189 kfree(priv);
190fail_alloc:
191 iounmap(hcd->regs);
192fail_ioremap:
193 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
194fail_request_resource:
195 usb_put_hcd(hcd);
196fail_create_hcd:
197 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
198
199 return ret;
200}
201
202static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
203{
204 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
205 struct usb_hcd *hcd = priv->hcd;
206
207 usb_remove_hcd(hcd);
208 iounmap(hcd->regs);
209 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
210 usb_put_hcd(hcd);
211 platform_set_drvdata(pdev, NULL);
212
213 clk_disable(priv->fclk);
214 clk_disable(priv->iclk);
215
216 clk_put(priv->fclk);
217 clk_put(priv->iclk);
218
219 kfree(priv);
220
221 return 0;
222}
223
224static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
225{
226 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
227 struct usb_hcd *hcd = priv->hcd;
228
229 if (hcd->driver->shutdown)
230 hcd->driver->shutdown(hcd);
231}
232
233static struct platform_driver ehci_hcd_sh_driver = {
234 .probe = ehci_hcd_sh_probe,
235 .remove = __exit_p(ehci_hcd_sh_remove),
236 .shutdown = ehci_hcd_sh_shutdown,
237 .driver = {
238 .name = "sh_ehci",
239 .owner = THIS_MODULE,
240 },
241};
242
243MODULE_ALIAS("platform:sh_ehci");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SuperH EHCI host controller driver
4 *
5 * Copyright (C) 2010 Paul Mundt
6 *
7 * Based on ohci-sh.c and ehci-atmel.c.
8 */
9#include <linux/platform_device.h>
10#include <linux/clk.h>
11
12struct ehci_sh_priv {
13 struct clk *iclk, *fclk;
14 struct usb_hcd *hcd;
15};
16
17static int ehci_sh_reset(struct usb_hcd *hcd)
18{
19 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
20
21 ehci->caps = hcd->regs;
22
23 return ehci_setup(hcd);
24}
25
26static const struct hc_driver ehci_sh_hc_driver = {
27 .description = hcd_name,
28 .product_desc = "SuperH EHCI",
29 .hcd_priv_size = sizeof(struct ehci_hcd),
30
31 /*
32 * generic hardware linkage
33 */
34 .irq = ehci_irq,
35 .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
36
37 /*
38 * basic lifecycle operations
39 */
40 .reset = ehci_sh_reset,
41 .start = ehci_run,
42 .stop = ehci_stop,
43 .shutdown = ehci_shutdown,
44
45 /*
46 * managing i/o requests and associated device resources
47 */
48 .urb_enqueue = ehci_urb_enqueue,
49 .urb_dequeue = ehci_urb_dequeue,
50 .endpoint_disable = ehci_endpoint_disable,
51 .endpoint_reset = ehci_endpoint_reset,
52
53 /*
54 * scheduling support
55 */
56 .get_frame_number = ehci_get_frame,
57
58 /*
59 * root hub support
60 */
61 .hub_status_data = ehci_hub_status_data,
62 .hub_control = ehci_hub_control,
63
64#ifdef CONFIG_PM
65 .bus_suspend = ehci_bus_suspend,
66 .bus_resume = ehci_bus_resume,
67#endif
68
69 .relinquish_port = ehci_relinquish_port,
70 .port_handed_over = ehci_port_handed_over,
71 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
72};
73
74static int ehci_hcd_sh_probe(struct platform_device *pdev)
75{
76 struct resource *res;
77 struct ehci_sh_priv *priv;
78 struct usb_hcd *hcd;
79 int irq, ret;
80
81 if (usb_disabled())
82 return -ENODEV;
83
84 irq = platform_get_irq(pdev, 0);
85 if (irq < 0) {
86 ret = irq;
87 goto fail_create_hcd;
88 }
89
90 /* initialize hcd */
91 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
92 dev_name(&pdev->dev));
93 if (!hcd) {
94 ret = -ENOMEM;
95 goto fail_create_hcd;
96 }
97
98 hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
99 if (IS_ERR(hcd->regs)) {
100 ret = PTR_ERR(hcd->regs);
101 goto fail_request_resource;
102 }
103 hcd->rsrc_start = res->start;
104 hcd->rsrc_len = resource_size(res);
105
106 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
107 GFP_KERNEL);
108 if (!priv) {
109 ret = -ENOMEM;
110 goto fail_request_resource;
111 }
112
113 /* These are optional, we don't care if they fail */
114 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
115 if (IS_ERR(priv->fclk))
116 priv->fclk = NULL;
117
118 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
119 if (IS_ERR(priv->iclk))
120 priv->iclk = NULL;
121
122 clk_enable(priv->fclk);
123 clk_enable(priv->iclk);
124
125 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
126 if (ret != 0) {
127 dev_err(&pdev->dev, "Failed to add hcd");
128 goto fail_add_hcd;
129 }
130 device_wakeup_enable(hcd->self.controller);
131
132 priv->hcd = hcd;
133 platform_set_drvdata(pdev, priv);
134
135 return ret;
136
137fail_add_hcd:
138 clk_disable(priv->iclk);
139 clk_disable(priv->fclk);
140
141fail_request_resource:
142 usb_put_hcd(hcd);
143fail_create_hcd:
144 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
145
146 return ret;
147}
148
149static void ehci_hcd_sh_remove(struct platform_device *pdev)
150{
151 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
152 struct usb_hcd *hcd = priv->hcd;
153
154 usb_remove_hcd(hcd);
155 usb_put_hcd(hcd);
156
157 clk_disable(priv->fclk);
158 clk_disable(priv->iclk);
159}
160
161static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
162{
163 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
164 struct usb_hcd *hcd = priv->hcd;
165
166 if (hcd->driver->shutdown)
167 hcd->driver->shutdown(hcd);
168}
169
170static struct platform_driver ehci_hcd_sh_driver = {
171 .probe = ehci_hcd_sh_probe,
172 .remove_new = ehci_hcd_sh_remove,
173 .shutdown = ehci_hcd_sh_shutdown,
174 .driver = {
175 .name = "sh_ehci",
176 },
177};
178
179MODULE_ALIAS("platform:sh_ehci");