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63c84552 PM |
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> | |
3e0c70d0 | 14 | #include <linux/platform_data/ehci-sh.h> |
63c84552 PM |
15 | |
16 | struct ehci_sh_priv { | |
17 | struct clk *iclk, *fclk; | |
18 | struct usb_hcd *hcd; | |
19 | }; | |
20 | ||
21 | static int ehci_sh_reset(struct usb_hcd *hcd) | |
22 | { | |
23 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
63c84552 PM |
24 | |
25 | ehci->caps = hcd->regs; | |
63c84552 | 26 | |
c73cee71 | 27 | return ehci_setup(hcd); |
63c84552 PM |
28 | } |
29 | ||
30 | static 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, | |
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, | |
6e9d4476 | 55 | .endpoint_reset = ehci_endpoint_reset, |
63c84552 PM |
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, | |
6e9d4476 | 75 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
63c84552 PM |
76 | }; |
77 | ||
78 | static int ehci_hcd_sh_probe(struct platform_device *pdev) | |
79 | { | |
63c84552 PM |
80 | struct resource *res; |
81 | struct ehci_sh_priv *priv; | |
3e0c70d0 | 82 | struct ehci_sh_platdata *pdata; |
63c84552 PM |
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 | ||
d4f09e28 | 107 | pdata = dev_get_platdata(&pdev->dev); |
3e0c70d0 | 108 | |
63c84552 PM |
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 | ||
148e1134 TR |
120 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
121 | if (IS_ERR(hcd->regs)) { | |
122 | ret = PTR_ERR(hcd->regs); | |
a926e298 | 123 | goto fail_request_resource; |
63c84552 PM |
124 | } |
125 | ||
a926e298 JL |
126 | priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), |
127 | GFP_KERNEL); | |
63c84552 PM |
128 | if (!priv) { |
129 | dev_dbg(&pdev->dev, "error allocating priv data\n"); | |
130 | ret = -ENOMEM; | |
a926e298 | 131 | goto fail_request_resource; |
63c84552 PM |
132 | } |
133 | ||
134 | /* These are optional, we don't care if they fail */ | |
a926e298 | 135 | priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); |
63c84552 PM |
136 | if (IS_ERR(priv->fclk)) |
137 | priv->fclk = NULL; | |
138 | ||
a926e298 | 139 | priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); |
63c84552 PM |
140 | if (IS_ERR(priv->iclk)) |
141 | priv->iclk = NULL; | |
142 | ||
143 | clk_enable(priv->fclk); | |
144 | clk_enable(priv->iclk); | |
145 | ||
3e0c70d0 NI |
146 | if (pdata && pdata->phy_init) |
147 | pdata->phy_init(); | |
148 | ||
b5dd18d8 | 149 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
63c84552 PM |
150 | if (ret != 0) { |
151 | dev_err(&pdev->dev, "Failed to add hcd"); | |
152 | goto fail_add_hcd; | |
153 | } | |
154 | ||
155 | priv->hcd = hcd; | |
156 | platform_set_drvdata(pdev, priv); | |
157 | ||
158 | return ret; | |
159 | ||
160 | fail_add_hcd: | |
161 | clk_disable(priv->iclk); | |
162 | clk_disable(priv->fclk); | |
163 | ||
63c84552 PM |
164 | fail_request_resource: |
165 | usb_put_hcd(hcd); | |
166 | fail_create_hcd: | |
167 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); | |
168 | ||
169 | return ret; | |
170 | } | |
171 | ||
39d35681 | 172 | static int ehci_hcd_sh_remove(struct platform_device *pdev) |
63c84552 PM |
173 | { |
174 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
175 | struct usb_hcd *hcd = priv->hcd; | |
176 | ||
177 | usb_remove_hcd(hcd); | |
63c84552 | 178 | usb_put_hcd(hcd); |
63c84552 PM |
179 | |
180 | clk_disable(priv->fclk); | |
181 | clk_disable(priv->iclk); | |
182 | ||
63c84552 PM |
183 | return 0; |
184 | } | |
185 | ||
c1e0774d PM |
186 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
187 | { | |
188 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
189 | struct usb_hcd *hcd = priv->hcd; | |
190 | ||
191 | if (hcd->driver->shutdown) | |
192 | hcd->driver->shutdown(hcd); | |
193 | } | |
194 | ||
63c84552 PM |
195 | static struct platform_driver ehci_hcd_sh_driver = { |
196 | .probe = ehci_hcd_sh_probe, | |
1c3a46de | 197 | .remove = ehci_hcd_sh_remove, |
c1e0774d | 198 | .shutdown = ehci_hcd_sh_shutdown, |
63c84552 PM |
199 | .driver = { |
200 | .name = "sh_ehci", | |
201 | .owner = THIS_MODULE, | |
202 | }, | |
203 | }; | |
204 | ||
205 | MODULE_ALIAS("platform:sh_ehci"); |