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1bcc5aa8 JS |
1 | /* |
2 | * SAMSUNG S5P USB HOST EHCI Controller | |
3 | * | |
4 | * Copyright (C) 2011 Samsung Electronics Co.Ltd | |
5 | * Author: Jingoo Han <jg1.han@samsung.com> | |
6 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/clk.h> | |
16 | #include <linux/platform_device.h> | |
1bcc5aa8 JS |
17 | #include <plat/ehci.h> |
18 | #include <plat/usb-phy.h> | |
19 | ||
88555a63 JH |
20 | #define EHCI_INSNREG00(base) (base + 0x90) |
21 | #define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25) | |
22 | #define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24) | |
23 | #define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23) | |
24 | #define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22) | |
25 | #define EHCI_INSNREG00_ENABLE_DMA_BURST \ | |
26 | (EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 | \ | |
27 | EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN) | |
28 | ||
1bcc5aa8 JS |
29 | struct s5p_ehci_hcd { |
30 | struct device *dev; | |
31 | struct usb_hcd *hcd; | |
32 | struct clk *clk; | |
33 | }; | |
34 | ||
35 | static const struct hc_driver s5p_ehci_hc_driver = { | |
36 | .description = hcd_name, | |
37 | .product_desc = "S5P EHCI Host Controller", | |
38 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
39 | ||
40 | .irq = ehci_irq, | |
41 | .flags = HCD_MEMORY | HCD_USB2, | |
42 | ||
43 | .reset = ehci_init, | |
44 | .start = ehci_run, | |
45 | .stop = ehci_stop, | |
46 | .shutdown = ehci_shutdown, | |
47 | ||
48 | .get_frame_number = ehci_get_frame, | |
49 | ||
50 | .urb_enqueue = ehci_urb_enqueue, | |
51 | .urb_dequeue = ehci_urb_dequeue, | |
52 | .endpoint_disable = ehci_endpoint_disable, | |
53 | .endpoint_reset = ehci_endpoint_reset, | |
54 | ||
55 | .hub_status_data = ehci_hub_status_data, | |
56 | .hub_control = ehci_hub_control, | |
57 | .bus_suspend = ehci_bus_suspend, | |
58 | .bus_resume = ehci_bus_resume, | |
59 | ||
60 | .relinquish_port = ehci_relinquish_port, | |
61 | .port_handed_over = ehci_port_handed_over, | |
62 | ||
63 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
64 | }; | |
65 | ||
27362d46 | 66 | static int __devinit s5p_ehci_probe(struct platform_device *pdev) |
1bcc5aa8 JS |
67 | { |
68 | struct s5p_ehci_platdata *pdata; | |
69 | struct s5p_ehci_hcd *s5p_ehci; | |
70 | struct usb_hcd *hcd; | |
71 | struct ehci_hcd *ehci; | |
72 | struct resource *res; | |
73 | int irq; | |
74 | int err; | |
75 | ||
76 | pdata = pdev->dev.platform_data; | |
77 | if (!pdata) { | |
78 | dev_err(&pdev->dev, "No platform data defined\n"); | |
79 | return -EINVAL; | |
80 | } | |
81 | ||
82 | s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL); | |
83 | if (!s5p_ehci) | |
84 | return -ENOMEM; | |
85 | ||
86 | s5p_ehci->dev = &pdev->dev; | |
87 | ||
88 | hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev, | |
89 | dev_name(&pdev->dev)); | |
90 | if (!hcd) { | |
91 | dev_err(&pdev->dev, "Unable to create HCD\n"); | |
92 | err = -ENOMEM; | |
93 | goto fail_hcd; | |
94 | } | |
95 | ||
e5d3d446 | 96 | s5p_ehci->hcd = hcd; |
1bcc5aa8 JS |
97 | s5p_ehci->clk = clk_get(&pdev->dev, "usbhost"); |
98 | ||
99 | if (IS_ERR(s5p_ehci->clk)) { | |
100 | dev_err(&pdev->dev, "Failed to get usbhost clock\n"); | |
101 | err = PTR_ERR(s5p_ehci->clk); | |
102 | goto fail_clk; | |
103 | } | |
104 | ||
105 | err = clk_enable(s5p_ehci->clk); | |
106 | if (err) | |
107 | goto fail_clken; | |
108 | ||
109 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
110 | if (!res) { | |
111 | dev_err(&pdev->dev, "Failed to get I/O memory\n"); | |
112 | err = -ENXIO; | |
113 | goto fail_io; | |
114 | } | |
115 | ||
116 | hcd->rsrc_start = res->start; | |
117 | hcd->rsrc_len = resource_size(res); | |
118 | hcd->regs = ioremap(res->start, resource_size(res)); | |
119 | if (!hcd->regs) { | |
120 | dev_err(&pdev->dev, "Failed to remap I/O memory\n"); | |
121 | err = -ENOMEM; | |
122 | goto fail_io; | |
123 | } | |
124 | ||
125 | irq = platform_get_irq(pdev, 0); | |
126 | if (!irq) { | |
127 | dev_err(&pdev->dev, "Failed to get IRQ\n"); | |
128 | err = -ENODEV; | |
129 | goto fail; | |
130 | } | |
131 | ||
132 | if (pdata->phy_init) | |
133 | pdata->phy_init(pdev, S5P_USB_PHY_HOST); | |
134 | ||
135 | ehci = hcd_to_ehci(hcd); | |
136 | ehci->caps = hcd->regs; | |
c430131a JA |
137 | ehci->regs = hcd->regs + |
138 | HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase)); | |
1bcc5aa8 | 139 | |
88555a63 JH |
140 | /* DMA burst Enable */ |
141 | writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); | |
142 | ||
1bcc5aa8 JS |
143 | dbg_hcs_params(ehci, "reset"); |
144 | dbg_hcc_params(ehci, "reset"); | |
145 | ||
146 | /* cache this readonly data; minimize chip reads */ | |
147 | ehci->hcs_params = readl(&ehci->caps->hcs_params); | |
148 | ||
876e0df9 GL |
149 | ehci_reset(ehci); |
150 | ||
b5dd18d8 | 151 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1bcc5aa8 JS |
152 | if (err) { |
153 | dev_err(&pdev->dev, "Failed to add USB HCD\n"); | |
154 | goto fail; | |
155 | } | |
156 | ||
157 | platform_set_drvdata(pdev, s5p_ehci); | |
158 | ||
159 | return 0; | |
160 | ||
161 | fail: | |
162 | iounmap(hcd->regs); | |
163 | fail_io: | |
164 | clk_disable(s5p_ehci->clk); | |
165 | fail_clken: | |
166 | clk_put(s5p_ehci->clk); | |
167 | fail_clk: | |
168 | usb_put_hcd(hcd); | |
169 | fail_hcd: | |
170 | kfree(s5p_ehci); | |
171 | return err; | |
172 | } | |
173 | ||
27362d46 | 174 | static int __devexit s5p_ehci_remove(struct platform_device *pdev) |
1bcc5aa8 JS |
175 | { |
176 | struct s5p_ehci_platdata *pdata = pdev->dev.platform_data; | |
177 | struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); | |
178 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
179 | ||
180 | usb_remove_hcd(hcd); | |
181 | ||
182 | if (pdata && pdata->phy_exit) | |
183 | pdata->phy_exit(pdev, S5P_USB_PHY_HOST); | |
184 | ||
185 | iounmap(hcd->regs); | |
186 | ||
187 | clk_disable(s5p_ehci->clk); | |
188 | clk_put(s5p_ehci->clk); | |
189 | ||
190 | usb_put_hcd(hcd); | |
191 | kfree(s5p_ehci); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static void s5p_ehci_shutdown(struct platform_device *pdev) | |
197 | { | |
198 | struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); | |
199 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
200 | ||
201 | if (hcd->driver->shutdown) | |
202 | hcd->driver->shutdown(hcd); | |
203 | } | |
204 | ||
1acb30ef JH |
205 | #ifdef CONFIG_PM |
206 | static int s5p_ehci_suspend(struct device *dev) | |
207 | { | |
208 | struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); | |
209 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
210 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
211 | struct platform_device *pdev = to_platform_device(dev); | |
212 | struct s5p_ehci_platdata *pdata = pdev->dev.platform_data; | |
213 | unsigned long flags; | |
214 | int rc = 0; | |
215 | ||
216 | if (time_before(jiffies, ehci->next_statechange)) | |
217 | msleep(20); | |
218 | ||
219 | /* | |
220 | * Root hub was already suspended. Disable irq emission and | |
221 | * mark HW unaccessible. The PM and USB cores make sure that | |
222 | * the root hub is either suspended or stopped. | |
223 | */ | |
224 | ehci_prepare_ports_for_controller_suspend(ehci, device_may_wakeup(dev)); | |
225 | spin_lock_irqsave(&ehci->lock, flags); | |
226 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); | |
227 | (void)ehci_readl(ehci, &ehci->regs->intr_enable); | |
228 | ||
229 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
230 | spin_unlock_irqrestore(&ehci->lock, flags); | |
231 | ||
232 | if (pdata && pdata->phy_exit) | |
233 | pdata->phy_exit(pdev, S5P_USB_PHY_HOST); | |
234 | ||
8b4fc8c7 JH |
235 | clk_disable(s5p_ehci->clk); |
236 | ||
1acb30ef JH |
237 | return rc; |
238 | } | |
239 | ||
240 | static int s5p_ehci_resume(struct device *dev) | |
241 | { | |
242 | struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); | |
243 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
244 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
245 | struct platform_device *pdev = to_platform_device(dev); | |
246 | struct s5p_ehci_platdata *pdata = pdev->dev.platform_data; | |
247 | ||
8b4fc8c7 JH |
248 | clk_enable(s5p_ehci->clk); |
249 | ||
1acb30ef JH |
250 | if (pdata && pdata->phy_init) |
251 | pdata->phy_init(pdev, S5P_USB_PHY_HOST); | |
252 | ||
88555a63 JH |
253 | /* DMA burst Enable */ |
254 | writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); | |
255 | ||
1acb30ef JH |
256 | if (time_before(jiffies, ehci->next_statechange)) |
257 | msleep(100); | |
258 | ||
259 | /* Mark hardware accessible again as we are out of D3 state by now */ | |
260 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
261 | ||
262 | if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) { | |
263 | int mask = INTR_MASK; | |
264 | ||
265 | ehci_prepare_ports_for_controller_resume(ehci); | |
266 | if (!hcd->self.root_hub->do_remote_wakeup) | |
267 | mask &= ~STS_PCD; | |
268 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); | |
269 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | usb_root_hub_lost_power(hcd->self.root_hub); | |
274 | ||
275 | (void) ehci_halt(ehci); | |
276 | (void) ehci_reset(ehci); | |
277 | ||
278 | /* emptying the schedule aborts any urbs */ | |
279 | spin_lock_irq(&ehci->lock); | |
280 | if (ehci->reclaim) | |
281 | end_unlink_async(ehci); | |
282 | ehci_work(ehci); | |
283 | spin_unlock_irq(&ehci->lock); | |
284 | ||
285 | ehci_writel(ehci, ehci->command, &ehci->regs->command); | |
286 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); | |
287 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ | |
288 | ||
289 | /* here we "know" root ports should always stay powered */ | |
290 | ehci_port_power(ehci, 1); | |
291 | ||
e8799906 | 292 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1acb30ef JH |
293 | |
294 | return 0; | |
295 | } | |
296 | #else | |
297 | #define s5p_ehci_suspend NULL | |
298 | #define s5p_ehci_resume NULL | |
299 | #endif | |
300 | ||
301 | static const struct dev_pm_ops s5p_ehci_pm_ops = { | |
302 | .suspend = s5p_ehci_suspend, | |
303 | .resume = s5p_ehci_resume, | |
304 | }; | |
305 | ||
1bcc5aa8 JS |
306 | static struct platform_driver s5p_ehci_driver = { |
307 | .probe = s5p_ehci_probe, | |
27362d46 | 308 | .remove = __devexit_p(s5p_ehci_remove), |
1bcc5aa8 JS |
309 | .shutdown = s5p_ehci_shutdown, |
310 | .driver = { | |
311 | .name = "s5p-ehci", | |
312 | .owner = THIS_MODULE, | |
1acb30ef | 313 | .pm = &s5p_ehci_pm_ops, |
1bcc5aa8 JS |
314 | } |
315 | }; | |
316 | ||
317 | MODULE_ALIAS("platform:s5p-ehci"); |