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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; | |
c430131a | 27 | ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci, |
63c84552 PM |
28 | &ehci->caps->hc_capbase)); |
29 | ||
30 | dbg_hcs_params(ehci, "reset"); | |
31 | dbg_hcc_params(ehci, "reset"); | |
32 | ||
33 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
34 | ||
35 | ret = ehci_halt(ehci); | |
36 | if (unlikely(ret)) | |
37 | return ret; | |
38 | ||
39 | ret = ehci_init(hcd); | |
40 | if (unlikely(ret)) | |
41 | return ret; | |
42 | ||
43 | ehci->sbrn = 0x20; | |
44 | ||
45 | ehci_reset(ehci); | |
46 | ehci_port_power(ehci, 0); | |
47 | ||
48 | return ret; | |
49 | } | |
50 | ||
51 | static const struct hc_driver ehci_sh_hc_driver = { | |
52 | .description = hcd_name, | |
53 | .product_desc = "SuperH EHCI", | |
54 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
55 | ||
56 | /* | |
57 | * generic hardware linkage | |
58 | */ | |
59 | .irq = ehci_irq, | |
60 | .flags = HCD_USB2 | HCD_MEMORY, | |
61 | ||
62 | /* | |
63 | * basic lifecycle operations | |
64 | */ | |
65 | .reset = ehci_sh_reset, | |
66 | .start = ehci_run, | |
67 | .stop = ehci_stop, | |
68 | .shutdown = ehci_shutdown, | |
69 | ||
70 | /* | |
71 | * managing i/o requests and associated device resources | |
72 | */ | |
73 | .urb_enqueue = ehci_urb_enqueue, | |
74 | .urb_dequeue = ehci_urb_dequeue, | |
75 | .endpoint_disable = ehci_endpoint_disable, | |
6e9d4476 | 76 | .endpoint_reset = ehci_endpoint_reset, |
63c84552 PM |
77 | |
78 | /* | |
79 | * scheduling support | |
80 | */ | |
81 | .get_frame_number = ehci_get_frame, | |
82 | ||
83 | /* | |
84 | * root hub support | |
85 | */ | |
86 | .hub_status_data = ehci_hub_status_data, | |
87 | .hub_control = ehci_hub_control, | |
88 | ||
89 | #ifdef CONFIG_PM | |
90 | .bus_suspend = ehci_bus_suspend, | |
91 | .bus_resume = ehci_bus_resume, | |
92 | #endif | |
93 | ||
94 | .relinquish_port = ehci_relinquish_port, | |
95 | .port_handed_over = ehci_port_handed_over, | |
6e9d4476 | 96 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
63c84552 PM |
97 | }; |
98 | ||
99 | static int ehci_hcd_sh_probe(struct platform_device *pdev) | |
100 | { | |
101 | const struct hc_driver *driver = &ehci_sh_hc_driver; | |
102 | struct resource *res; | |
103 | struct ehci_sh_priv *priv; | |
3e0c70d0 | 104 | struct ehci_sh_platdata *pdata; |
63c84552 PM |
105 | struct usb_hcd *hcd; |
106 | int irq, ret; | |
107 | ||
108 | if (usb_disabled()) | |
109 | return -ENODEV; | |
110 | ||
111 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
112 | if (!res) { | |
113 | dev_err(&pdev->dev, | |
114 | "Found HC with no register addr. Check %s setup!\n", | |
115 | dev_name(&pdev->dev)); | |
116 | ret = -ENODEV; | |
117 | goto fail_create_hcd; | |
118 | } | |
119 | ||
120 | irq = platform_get_irq(pdev, 0); | |
121 | if (irq <= 0) { | |
122 | dev_err(&pdev->dev, | |
123 | "Found HC with no IRQ. Check %s setup!\n", | |
124 | dev_name(&pdev->dev)); | |
125 | ret = -ENODEV; | |
126 | goto fail_create_hcd; | |
127 | } | |
128 | ||
5897b038 | 129 | pdata = pdev->dev.platform_data; |
3e0c70d0 | 130 | |
63c84552 PM |
131 | /* initialize hcd */ |
132 | hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, | |
133 | dev_name(&pdev->dev)); | |
134 | if (!hcd) { | |
135 | ret = -ENOMEM; | |
136 | goto fail_create_hcd; | |
137 | } | |
138 | ||
139 | hcd->rsrc_start = res->start; | |
140 | hcd->rsrc_len = resource_size(res); | |
141 | ||
142 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
143 | driver->description)) { | |
144 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
145 | ret = -EBUSY; | |
146 | goto fail_request_resource; | |
147 | } | |
148 | ||
149 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); | |
150 | if (hcd->regs == NULL) { | |
151 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
152 | ret = -ENXIO; | |
153 | goto fail_ioremap; | |
154 | } | |
155 | ||
156 | priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL); | |
157 | if (!priv) { | |
158 | dev_dbg(&pdev->dev, "error allocating priv data\n"); | |
159 | ret = -ENOMEM; | |
160 | goto fail_alloc; | |
161 | } | |
162 | ||
163 | /* These are optional, we don't care if they fail */ | |
164 | priv->fclk = clk_get(&pdev->dev, "usb_fck"); | |
165 | if (IS_ERR(priv->fclk)) | |
166 | priv->fclk = NULL; | |
167 | ||
168 | priv->iclk = clk_get(&pdev->dev, "usb_ick"); | |
169 | if (IS_ERR(priv->iclk)) | |
170 | priv->iclk = NULL; | |
171 | ||
172 | clk_enable(priv->fclk); | |
173 | clk_enable(priv->iclk); | |
174 | ||
3e0c70d0 NI |
175 | if (pdata && pdata->phy_init) |
176 | pdata->phy_init(); | |
177 | ||
b5dd18d8 | 178 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
63c84552 PM |
179 | if (ret != 0) { |
180 | dev_err(&pdev->dev, "Failed to add hcd"); | |
181 | goto fail_add_hcd; | |
182 | } | |
183 | ||
184 | priv->hcd = hcd; | |
185 | platform_set_drvdata(pdev, priv); | |
186 | ||
187 | return ret; | |
188 | ||
189 | fail_add_hcd: | |
190 | clk_disable(priv->iclk); | |
191 | clk_disable(priv->fclk); | |
192 | ||
193 | clk_put(priv->iclk); | |
194 | clk_put(priv->fclk); | |
195 | ||
196 | kfree(priv); | |
197 | fail_alloc: | |
198 | iounmap(hcd->regs); | |
199 | fail_ioremap: | |
200 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
201 | fail_request_resource: | |
202 | usb_put_hcd(hcd); | |
203 | fail_create_hcd: | |
204 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); | |
205 | ||
206 | return ret; | |
207 | } | |
208 | ||
209 | static int __exit ehci_hcd_sh_remove(struct platform_device *pdev) | |
210 | { | |
211 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
212 | struct usb_hcd *hcd = priv->hcd; | |
213 | ||
214 | usb_remove_hcd(hcd); | |
215 | iounmap(hcd->regs); | |
216 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
217 | usb_put_hcd(hcd); | |
218 | platform_set_drvdata(pdev, NULL); | |
219 | ||
220 | clk_disable(priv->fclk); | |
221 | clk_disable(priv->iclk); | |
222 | ||
223 | clk_put(priv->fclk); | |
224 | clk_put(priv->iclk); | |
225 | ||
226 | kfree(priv); | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
c1e0774d PM |
231 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
232 | { | |
233 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); | |
234 | struct usb_hcd *hcd = priv->hcd; | |
235 | ||
236 | if (hcd->driver->shutdown) | |
237 | hcd->driver->shutdown(hcd); | |
238 | } | |
239 | ||
63c84552 PM |
240 | static struct platform_driver ehci_hcd_sh_driver = { |
241 | .probe = ehci_hcd_sh_probe, | |
242 | .remove = __exit_p(ehci_hcd_sh_remove), | |
c1e0774d | 243 | .shutdown = ehci_hcd_sh_shutdown, |
63c84552 PM |
244 | .driver = { |
245 | .name = "sh_ehci", | |
246 | .owner = THIS_MODULE, | |
247 | }, | |
248 | }; | |
249 | ||
250 | MODULE_ALIAS("platform:sh_ehci"); |