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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 | { | |
80 | const struct hc_driver *driver = &ehci_sh_hc_driver; | |
81 | struct resource *res; | |
82 | struct ehci_sh_priv *priv; | |
3e0c70d0 | 83 | struct ehci_sh_platdata *pdata; |
63c84552 PM |
84 | struct usb_hcd *hcd; |
85 | int irq, ret; | |
86 | ||
87 | if (usb_disabled()) | |
88 | return -ENODEV; | |
89 | ||
90 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
91 | if (!res) { | |
92 | dev_err(&pdev->dev, | |
93 | "Found HC with no register addr. Check %s setup!\n", | |
94 | dev_name(&pdev->dev)); | |
95 | ret = -ENODEV; | |
96 | goto fail_create_hcd; | |
97 | } | |
98 | ||
99 | irq = platform_get_irq(pdev, 0); | |
100 | if (irq <= 0) { | |
101 | dev_err(&pdev->dev, | |
102 | "Found HC with no IRQ. Check %s setup!\n", | |
103 | dev_name(&pdev->dev)); | |
104 | ret = -ENODEV; | |
105 | goto fail_create_hcd; | |
106 | } | |
107 | ||
5897b038 | 108 | pdata = pdev->dev.platform_data; |
3e0c70d0 | 109 | |
63c84552 PM |
110 | /* initialize hcd */ |
111 | hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, | |
112 | dev_name(&pdev->dev)); | |
113 | if (!hcd) { | |
114 | ret = -ENOMEM; | |
115 | goto fail_create_hcd; | |
116 | } | |
117 | ||
118 | hcd->rsrc_start = res->start; | |
119 | hcd->rsrc_len = resource_size(res); | |
120 | ||
a926e298 | 121 | hcd->regs = devm_request_and_ioremap(&pdev->dev, res); |
63c84552 PM |
122 | if (hcd->regs == NULL) { |
123 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
124 | ret = -ENXIO; | |
a926e298 | 125 | goto fail_request_resource; |
63c84552 PM |
126 | } |
127 | ||
a926e298 JL |
128 | priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), |
129 | GFP_KERNEL); | |
63c84552 PM |
130 | if (!priv) { |
131 | dev_dbg(&pdev->dev, "error allocating priv data\n"); | |
132 | ret = -ENOMEM; | |
a926e298 | 133 | goto fail_request_resource; |
63c84552 PM |
134 | } |
135 | ||
136 | /* These are optional, we don't care if they fail */ | |
a926e298 | 137 | priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); |
63c84552 PM |
138 | if (IS_ERR(priv->fclk)) |
139 | priv->fclk = NULL; | |
140 | ||
a926e298 | 141 | priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); |
63c84552 PM |
142 | if (IS_ERR(priv->iclk)) |
143 | priv->iclk = NULL; | |
144 | ||
145 | clk_enable(priv->fclk); | |
146 | clk_enable(priv->iclk); | |
147 | ||
3e0c70d0 NI |
148 | if (pdata && pdata->phy_init) |
149 | pdata->phy_init(); | |
150 | ||
b5dd18d8 | 151 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
63c84552 PM |
152 | if (ret != 0) { |
153 | dev_err(&pdev->dev, "Failed to add hcd"); | |
154 | goto fail_add_hcd; | |
155 | } | |
156 | ||
157 | priv->hcd = hcd; | |
158 | platform_set_drvdata(pdev, priv); | |
159 | ||
160 | return ret; | |
161 | ||
162 | fail_add_hcd: | |
163 | clk_disable(priv->iclk); | |
164 | clk_disable(priv->fclk); | |
165 | ||
63c84552 PM |
166 | fail_request_resource: |
167 | usb_put_hcd(hcd); | |
168 | fail_create_hcd: | |
169 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static int __exit ehci_hcd_sh_remove(struct platform_device *pdev) | |
175 | { | |
176 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
177 | struct usb_hcd *hcd = priv->hcd; | |
178 | ||
179 | usb_remove_hcd(hcd); | |
63c84552 PM |
180 | usb_put_hcd(hcd); |
181 | platform_set_drvdata(pdev, NULL); | |
182 | ||
183 | clk_disable(priv->fclk); | |
184 | clk_disable(priv->iclk); | |
185 | ||
63c84552 PM |
186 | return 0; |
187 | } | |
188 | ||
c1e0774d PM |
189 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
190 | { | |
191 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
192 | struct usb_hcd *hcd = priv->hcd; | |
193 | ||
194 | if (hcd->driver->shutdown) | |
195 | hcd->driver->shutdown(hcd); | |
196 | } | |
197 | ||
63c84552 PM |
198 | static struct platform_driver ehci_hcd_sh_driver = { |
199 | .probe = ehci_hcd_sh_probe, | |
200 | .remove = __exit_p(ehci_hcd_sh_remove), | |
c1e0774d | 201 | .shutdown = ehci_hcd_sh_shutdown, |
63c84552 PM |
202 | .driver = { |
203 | .name = "sh_ehci", | |
204 | .owner = THIS_MODULE, | |
205 | }, | |
206 | }; | |
207 | ||
208 | MODULE_ALIAS("platform:sh_ehci"); |