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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
63c84552 PM |
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. | |
63c84552 PM |
8 | */ |
9 | #include <linux/platform_device.h> | |
10 | #include <linux/clk.h> | |
11 | ||
12 | struct ehci_sh_priv { | |
13 | struct clk *iclk, *fclk; | |
14 | struct usb_hcd *hcd; | |
15 | }; | |
16 | ||
17 | static int ehci_sh_reset(struct usb_hcd *hcd) | |
18 | { | |
19 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
63c84552 PM |
20 | |
21 | ehci->caps = hcd->regs; | |
63c84552 | 22 | |
c73cee71 | 23 | return ehci_setup(hcd); |
63c84552 PM |
24 | } |
25 | ||
26 | static 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, | |
7b81cb6b | 35 | .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH, |
63c84552 PM |
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, | |
6e9d4476 | 51 | .endpoint_reset = ehci_endpoint_reset, |
63c84552 PM |
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, | |
6e9d4476 | 71 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
63c84552 PM |
72 | }; |
73 | ||
74 | static int ehci_hcd_sh_probe(struct platform_device *pdev) | |
75 | { | |
63c84552 PM |
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 | ||
63c84552 PM |
84 | irq = platform_get_irq(pdev, 0); |
85 | if (irq <= 0) { | |
63c84552 PM |
86 | ret = -ENODEV; |
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 | ||
e71827f4 | 98 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
148e1134 TR |
99 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
100 | if (IS_ERR(hcd->regs)) { | |
101 | ret = PTR_ERR(hcd->regs); | |
a926e298 | 102 | goto fail_request_resource; |
63c84552 | 103 | } |
e71827f4 VB |
104 | hcd->rsrc_start = res->start; |
105 | hcd->rsrc_len = resource_size(res); | |
63c84552 | 106 | |
a926e298 JL |
107 | priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), |
108 | GFP_KERNEL); | |
63c84552 | 109 | if (!priv) { |
63c84552 | 110 | ret = -ENOMEM; |
a926e298 | 111 | goto fail_request_resource; |
63c84552 PM |
112 | } |
113 | ||
114 | /* These are optional, we don't care if they fail */ | |
a926e298 | 115 | priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); |
63c84552 PM |
116 | if (IS_ERR(priv->fclk)) |
117 | priv->fclk = NULL; | |
118 | ||
a926e298 | 119 | priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); |
63c84552 PM |
120 | if (IS_ERR(priv->iclk)) |
121 | priv->iclk = NULL; | |
122 | ||
123 | clk_enable(priv->fclk); | |
124 | clk_enable(priv->iclk); | |
125 | ||
b5dd18d8 | 126 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
63c84552 PM |
127 | if (ret != 0) { |
128 | dev_err(&pdev->dev, "Failed to add hcd"); | |
129 | goto fail_add_hcd; | |
130 | } | |
3c9740a1 | 131 | device_wakeup_enable(hcd->self.controller); |
63c84552 PM |
132 | |
133 | priv->hcd = hcd; | |
134 | platform_set_drvdata(pdev, priv); | |
135 | ||
136 | return ret; | |
137 | ||
138 | fail_add_hcd: | |
139 | clk_disable(priv->iclk); | |
140 | clk_disable(priv->fclk); | |
141 | ||
63c84552 PM |
142 | fail_request_resource: |
143 | usb_put_hcd(hcd); | |
144 | fail_create_hcd: | |
145 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); | |
146 | ||
147 | return ret; | |
148 | } | |
149 | ||
39d35681 | 150 | static int ehci_hcd_sh_remove(struct platform_device *pdev) |
63c84552 PM |
151 | { |
152 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
153 | struct usb_hcd *hcd = priv->hcd; | |
154 | ||
155 | usb_remove_hcd(hcd); | |
63c84552 | 156 | usb_put_hcd(hcd); |
63c84552 PM |
157 | |
158 | clk_disable(priv->fclk); | |
159 | clk_disable(priv->iclk); | |
160 | ||
63c84552 PM |
161 | return 0; |
162 | } | |
163 | ||
c1e0774d PM |
164 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
165 | { | |
166 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
167 | struct usb_hcd *hcd = priv->hcd; | |
168 | ||
169 | if (hcd->driver->shutdown) | |
170 | hcd->driver->shutdown(hcd); | |
171 | } | |
172 | ||
63c84552 PM |
173 | static struct platform_driver ehci_hcd_sh_driver = { |
174 | .probe = ehci_hcd_sh_probe, | |
1c3a46de | 175 | .remove = ehci_hcd_sh_remove, |
c1e0774d | 176 | .shutdown = ehci_hcd_sh_shutdown, |
63c84552 PM |
177 | .driver = { |
178 | .name = "sh_ehci", | |
63c84552 PM |
179 | }, |
180 | }; | |
181 | ||
182 | MODULE_ALIAS("platform:sh_ehci"); |