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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");
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");