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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#include <linux/platform_data/ehci-sh.h>
15
16struct ehci_sh_priv {
17 struct clk *iclk, *fclk;
18 struct usb_hcd *hcd;
19};
20
21static int ehci_sh_reset(struct usb_hcd *hcd)
22{
23 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
24
25 ehci->caps = hcd->regs;
26
27 return ehci_setup(hcd);
28}
29
30static const struct hc_driver ehci_sh_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "SuperH EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
34
35 /*
36 * generic hardware linkage
37 */
38 .irq = ehci_irq,
39 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
40
41 /*
42 * basic lifecycle operations
43 */
44 .reset = ehci_sh_reset,
45 .start = ehci_run,
46 .stop = ehci_stop,
47 .shutdown = ehci_shutdown,
48
49 /*
50 * managing i/o requests and associated device resources
51 */
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
56
57 /*
58 * scheduling support
59 */
60 .get_frame_number = ehci_get_frame,
61
62 /*
63 * root hub support
64 */
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
67
68#ifdef CONFIG_PM
69 .bus_suspend = ehci_bus_suspend,
70 .bus_resume = ehci_bus_resume,
71#endif
72
73 .relinquish_port = ehci_relinquish_port,
74 .port_handed_over = ehci_port_handed_over,
75 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
76};
77
78static int ehci_hcd_sh_probe(struct platform_device *pdev)
79{
80 struct resource *res;
81 struct ehci_sh_priv *priv;
82 struct ehci_sh_platdata *pdata;
83 struct usb_hcd *hcd;
84 int irq, ret;
85
86 if (usb_disabled())
87 return -ENODEV;
88
89 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
90 if (!res) {
91 dev_err(&pdev->dev,
92 "Found HC with no register addr. Check %s setup!\n",
93 dev_name(&pdev->dev));
94 ret = -ENODEV;
95 goto fail_create_hcd;
96 }
97
98 irq = platform_get_irq(pdev, 0);
99 if (irq <= 0) {
100 dev_err(&pdev->dev,
101 "Found HC with no IRQ. Check %s setup!\n",
102 dev_name(&pdev->dev));
103 ret = -ENODEV;
104 goto fail_create_hcd;
105 }
106
107 pdata = dev_get_platdata(&pdev->dev);
108
109 /* initialize hcd */
110 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
111 dev_name(&pdev->dev));
112 if (!hcd) {
113 ret = -ENOMEM;
114 goto fail_create_hcd;
115 }
116
117 hcd->rsrc_start = res->start;
118 hcd->rsrc_len = resource_size(res);
119
120 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
121 if (IS_ERR(hcd->regs)) {
122 ret = PTR_ERR(hcd->regs);
123 goto fail_request_resource;
124 }
125
126 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
127 GFP_KERNEL);
128 if (!priv) {
129 dev_dbg(&pdev->dev, "error allocating priv data\n");
130 ret = -ENOMEM;
131 goto fail_request_resource;
132 }
133
134 /* These are optional, we don't care if they fail */
135 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
136 if (IS_ERR(priv->fclk))
137 priv->fclk = NULL;
138
139 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
140 if (IS_ERR(priv->iclk))
141 priv->iclk = NULL;
142
143 clk_enable(priv->fclk);
144 clk_enable(priv->iclk);
145
146 if (pdata && pdata->phy_init)
147 pdata->phy_init();
148
149 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
150 if (ret != 0) {
151 dev_err(&pdev->dev, "Failed to add hcd");
152 goto fail_add_hcd;
153 }
154 device_wakeup_enable(hcd->self.controller);
155
156 priv->hcd = hcd;
157 platform_set_drvdata(pdev, priv);
158
159 return ret;
160
161fail_add_hcd:
162 clk_disable(priv->iclk);
163 clk_disable(priv->fclk);
164
165fail_request_resource:
166 usb_put_hcd(hcd);
167fail_create_hcd:
168 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
169
170 return ret;
171}
172
173static int ehci_hcd_sh_remove(struct platform_device *pdev)
174{
175 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
176 struct usb_hcd *hcd = priv->hcd;
177
178 usb_remove_hcd(hcd);
179 usb_put_hcd(hcd);
180
181 clk_disable(priv->fclk);
182 clk_disable(priv->iclk);
183
184 return 0;
185}
186
187static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
188{
189 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
190 struct usb_hcd *hcd = priv->hcd;
191
192 if (hcd->driver->shutdown)
193 hcd->driver->shutdown(hcd);
194}
195
196static struct platform_driver ehci_hcd_sh_driver = {
197 .probe = ehci_hcd_sh_probe,
198 .remove = ehci_hcd_sh_remove,
199 .shutdown = ehci_hcd_sh_shutdown,
200 .driver = {
201 .name = "sh_ehci",
202 .owner = THIS_MODULE,
203 },
204};
205
206MODULE_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#include <linux/platform_data/ehci-sh.h>
12
13struct ehci_sh_priv {
14 struct clk *iclk, *fclk;
15 struct usb_hcd *hcd;
16};
17
18static int ehci_sh_reset(struct usb_hcd *hcd)
19{
20 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
21
22 ehci->caps = hcd->regs;
23
24 return ehci_setup(hcd);
25}
26
27static const struct hc_driver ehci_sh_hc_driver = {
28 .description = hcd_name,
29 .product_desc = "SuperH EHCI",
30 .hcd_priv_size = sizeof(struct ehci_hcd),
31
32 /*
33 * generic hardware linkage
34 */
35 .irq = ehci_irq,
36 .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
37
38 /*
39 * basic lifecycle operations
40 */
41 .reset = ehci_sh_reset,
42 .start = ehci_run,
43 .stop = ehci_stop,
44 .shutdown = ehci_shutdown,
45
46 /*
47 * managing i/o requests and associated device resources
48 */
49 .urb_enqueue = ehci_urb_enqueue,
50 .urb_dequeue = ehci_urb_dequeue,
51 .endpoint_disable = ehci_endpoint_disable,
52 .endpoint_reset = ehci_endpoint_reset,
53
54 /*
55 * scheduling support
56 */
57 .get_frame_number = ehci_get_frame,
58
59 /*
60 * root hub support
61 */
62 .hub_status_data = ehci_hub_status_data,
63 .hub_control = ehci_hub_control,
64
65#ifdef CONFIG_PM
66 .bus_suspend = ehci_bus_suspend,
67 .bus_resume = ehci_bus_resume,
68#endif
69
70 .relinquish_port = ehci_relinquish_port,
71 .port_handed_over = ehci_port_handed_over,
72 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
73};
74
75static int ehci_hcd_sh_probe(struct platform_device *pdev)
76{
77 struct resource *res;
78 struct ehci_sh_priv *priv;
79 struct ehci_sh_platdata *pdata;
80 struct usb_hcd *hcd;
81 int irq, ret;
82
83 if (usb_disabled())
84 return -ENODEV;
85
86 irq = platform_get_irq(pdev, 0);
87 if (irq <= 0) {
88 ret = -ENODEV;
89 goto fail_create_hcd;
90 }
91
92 pdata = dev_get_platdata(&pdev->dev);
93
94 /* initialize hcd */
95 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
96 dev_name(&pdev->dev));
97 if (!hcd) {
98 ret = -ENOMEM;
99 goto fail_create_hcd;
100 }
101
102 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
103 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
104 if (IS_ERR(hcd->regs)) {
105 ret = PTR_ERR(hcd->regs);
106 goto fail_request_resource;
107 }
108 hcd->rsrc_start = res->start;
109 hcd->rsrc_len = resource_size(res);
110
111 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
112 GFP_KERNEL);
113 if (!priv) {
114 ret = -ENOMEM;
115 goto fail_request_resource;
116 }
117
118 /* These are optional, we don't care if they fail */
119 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
120 if (IS_ERR(priv->fclk))
121 priv->fclk = NULL;
122
123 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
124 if (IS_ERR(priv->iclk))
125 priv->iclk = NULL;
126
127 clk_enable(priv->fclk);
128 clk_enable(priv->iclk);
129
130 if (pdata && pdata->phy_init)
131 pdata->phy_init();
132
133 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
134 if (ret != 0) {
135 dev_err(&pdev->dev, "Failed to add hcd");
136 goto fail_add_hcd;
137 }
138 device_wakeup_enable(hcd->self.controller);
139
140 priv->hcd = hcd;
141 platform_set_drvdata(pdev, priv);
142
143 return ret;
144
145fail_add_hcd:
146 clk_disable(priv->iclk);
147 clk_disable(priv->fclk);
148
149fail_request_resource:
150 usb_put_hcd(hcd);
151fail_create_hcd:
152 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
153
154 return ret;
155}
156
157static int ehci_hcd_sh_remove(struct platform_device *pdev)
158{
159 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
160 struct usb_hcd *hcd = priv->hcd;
161
162 usb_remove_hcd(hcd);
163 usb_put_hcd(hcd);
164
165 clk_disable(priv->fclk);
166 clk_disable(priv->iclk);
167
168 return 0;
169}
170
171static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
172{
173 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
174 struct usb_hcd *hcd = priv->hcd;
175
176 if (hcd->driver->shutdown)
177 hcd->driver->shutdown(hcd);
178}
179
180static struct platform_driver ehci_hcd_sh_driver = {
181 .probe = ehci_hcd_sh_probe,
182 .remove = ehci_hcd_sh_remove,
183 .shutdown = ehci_hcd_sh_shutdown,
184 .driver = {
185 .name = "sh_ehci",
186 },
187};
188
189MODULE_ALIAS("platform:sh_ehci");