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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); | |
24 | int ret; | |
25 | ||
26 | ehci->caps = hcd->regs; | |
63c84552 | 27 | |
1a49e2ac | 28 | ret = ehci_setup(hcd); |
63c84552 PM |
29 | if (unlikely(ret)) |
30 | return ret; | |
31 | ||
63c84552 PM |
32 | ehci_port_power(ehci, 0); |
33 | ||
34 | return ret; | |
35 | } | |
36 | ||
37 | static const struct hc_driver ehci_sh_hc_driver = { | |
38 | .description = hcd_name, | |
39 | .product_desc = "SuperH EHCI", | |
40 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
41 | ||
42 | /* | |
43 | * generic hardware linkage | |
44 | */ | |
45 | .irq = ehci_irq, | |
46 | .flags = HCD_USB2 | HCD_MEMORY, | |
47 | ||
48 | /* | |
49 | * basic lifecycle operations | |
50 | */ | |
51 | .reset = ehci_sh_reset, | |
52 | .start = ehci_run, | |
53 | .stop = ehci_stop, | |
54 | .shutdown = ehci_shutdown, | |
55 | ||
56 | /* | |
57 | * managing i/o requests and associated device resources | |
58 | */ | |
59 | .urb_enqueue = ehci_urb_enqueue, | |
60 | .urb_dequeue = ehci_urb_dequeue, | |
61 | .endpoint_disable = ehci_endpoint_disable, | |
6e9d4476 | 62 | .endpoint_reset = ehci_endpoint_reset, |
63c84552 PM |
63 | |
64 | /* | |
65 | * scheduling support | |
66 | */ | |
67 | .get_frame_number = ehci_get_frame, | |
68 | ||
69 | /* | |
70 | * root hub support | |
71 | */ | |
72 | .hub_status_data = ehci_hub_status_data, | |
73 | .hub_control = ehci_hub_control, | |
74 | ||
75 | #ifdef CONFIG_PM | |
76 | .bus_suspend = ehci_bus_suspend, | |
77 | .bus_resume = ehci_bus_resume, | |
78 | #endif | |
79 | ||
80 | .relinquish_port = ehci_relinquish_port, | |
81 | .port_handed_over = ehci_port_handed_over, | |
6e9d4476 | 82 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
63c84552 PM |
83 | }; |
84 | ||
85 | static int ehci_hcd_sh_probe(struct platform_device *pdev) | |
86 | { | |
87 | const struct hc_driver *driver = &ehci_sh_hc_driver; | |
88 | struct resource *res; | |
89 | struct ehci_sh_priv *priv; | |
3e0c70d0 | 90 | struct ehci_sh_platdata *pdata; |
63c84552 PM |
91 | struct usb_hcd *hcd; |
92 | int irq, ret; | |
93 | ||
94 | if (usb_disabled()) | |
95 | return -ENODEV; | |
96 | ||
97 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
98 | if (!res) { | |
99 | dev_err(&pdev->dev, | |
100 | "Found HC with no register addr. Check %s setup!\n", | |
101 | dev_name(&pdev->dev)); | |
102 | ret = -ENODEV; | |
103 | goto fail_create_hcd; | |
104 | } | |
105 | ||
106 | irq = platform_get_irq(pdev, 0); | |
107 | if (irq <= 0) { | |
108 | dev_err(&pdev->dev, | |
109 | "Found HC with no IRQ. Check %s setup!\n", | |
110 | dev_name(&pdev->dev)); | |
111 | ret = -ENODEV; | |
112 | goto fail_create_hcd; | |
113 | } | |
114 | ||
5897b038 | 115 | pdata = pdev->dev.platform_data; |
3e0c70d0 | 116 | |
63c84552 PM |
117 | /* initialize hcd */ |
118 | hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, | |
119 | dev_name(&pdev->dev)); | |
120 | if (!hcd) { | |
121 | ret = -ENOMEM; | |
122 | goto fail_create_hcd; | |
123 | } | |
124 | ||
125 | hcd->rsrc_start = res->start; | |
126 | hcd->rsrc_len = resource_size(res); | |
127 | ||
a926e298 | 128 | hcd->regs = devm_request_and_ioremap(&pdev->dev, res); |
63c84552 PM |
129 | if (hcd->regs == NULL) { |
130 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
131 | ret = -ENXIO; | |
a926e298 | 132 | goto fail_request_resource; |
63c84552 PM |
133 | } |
134 | ||
a926e298 JL |
135 | priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), |
136 | GFP_KERNEL); | |
63c84552 PM |
137 | if (!priv) { |
138 | dev_dbg(&pdev->dev, "error allocating priv data\n"); | |
139 | ret = -ENOMEM; | |
a926e298 | 140 | goto fail_request_resource; |
63c84552 PM |
141 | } |
142 | ||
143 | /* These are optional, we don't care if they fail */ | |
a926e298 | 144 | priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); |
63c84552 PM |
145 | if (IS_ERR(priv->fclk)) |
146 | priv->fclk = NULL; | |
147 | ||
a926e298 | 148 | priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); |
63c84552 PM |
149 | if (IS_ERR(priv->iclk)) |
150 | priv->iclk = NULL; | |
151 | ||
152 | clk_enable(priv->fclk); | |
153 | clk_enable(priv->iclk); | |
154 | ||
3e0c70d0 NI |
155 | if (pdata && pdata->phy_init) |
156 | pdata->phy_init(); | |
157 | ||
b5dd18d8 | 158 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
63c84552 PM |
159 | if (ret != 0) { |
160 | dev_err(&pdev->dev, "Failed to add hcd"); | |
161 | goto fail_add_hcd; | |
162 | } | |
163 | ||
164 | priv->hcd = hcd; | |
165 | platform_set_drvdata(pdev, priv); | |
166 | ||
167 | return ret; | |
168 | ||
169 | fail_add_hcd: | |
170 | clk_disable(priv->iclk); | |
171 | clk_disable(priv->fclk); | |
172 | ||
63c84552 PM |
173 | fail_request_resource: |
174 | usb_put_hcd(hcd); | |
175 | fail_create_hcd: | |
176 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); | |
177 | ||
178 | return ret; | |
179 | } | |
180 | ||
181 | static int __exit ehci_hcd_sh_remove(struct platform_device *pdev) | |
182 | { | |
183 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
184 | struct usb_hcd *hcd = priv->hcd; | |
185 | ||
186 | usb_remove_hcd(hcd); | |
63c84552 PM |
187 | usb_put_hcd(hcd); |
188 | platform_set_drvdata(pdev, NULL); | |
189 | ||
190 | clk_disable(priv->fclk); | |
191 | clk_disable(priv->iclk); | |
192 | ||
63c84552 PM |
193 | return 0; |
194 | } | |
195 | ||
c1e0774d PM |
196 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
197 | { | |
198 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
199 | struct usb_hcd *hcd = priv->hcd; | |
200 | ||
201 | if (hcd->driver->shutdown) | |
202 | hcd->driver->shutdown(hcd); | |
203 | } | |
204 | ||
63c84552 PM |
205 | static struct platform_driver ehci_hcd_sh_driver = { |
206 | .probe = ehci_hcd_sh_probe, | |
207 | .remove = __exit_p(ehci_hcd_sh_remove), | |
c1e0774d | 208 | .shutdown = ehci_hcd_sh_shutdown, |
63c84552 PM |
209 | .driver = { |
210 | .name = "sh_ehci", | |
211 | .owner = THIS_MODULE, | |
212 | }, | |
213 | }; | |
214 | ||
215 | MODULE_ALIAS("platform:sh_ehci"); |