2 * SAMSUNG S5P USB HOST EHCI Controller
4 * Copyright (C) 2011 Samsung Electronics Co.Ltd
5 * Author: Jingoo Han <jg1.han@samsung.com>
6 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
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.
15 #include <linux/clk.h>
16 #include <linux/platform_device.h>
17 #include <plat/ehci.h>
18 #include <plat/usb-phy.h>
26 static const struct hc_driver s5p_ehci_hc_driver
= {
27 .description
= hcd_name
,
28 .product_desc
= "S5P EHCI Host Controller",
29 .hcd_priv_size
= sizeof(struct ehci_hcd
),
32 .flags
= HCD_MEMORY
| HCD_USB2
,
37 .shutdown
= ehci_shutdown
,
39 .get_frame_number
= ehci_get_frame
,
41 .urb_enqueue
= ehci_urb_enqueue
,
42 .urb_dequeue
= ehci_urb_dequeue
,
43 .endpoint_disable
= ehci_endpoint_disable
,
44 .endpoint_reset
= ehci_endpoint_reset
,
46 .hub_status_data
= ehci_hub_status_data
,
47 .hub_control
= ehci_hub_control
,
48 .bus_suspend
= ehci_bus_suspend
,
49 .bus_resume
= ehci_bus_resume
,
51 .relinquish_port
= ehci_relinquish_port
,
52 .port_handed_over
= ehci_port_handed_over
,
54 .clear_tt_buffer_complete
= ehci_clear_tt_buffer_complete
,
57 static int __devinit
s5p_ehci_probe(struct platform_device
*pdev
)
59 struct s5p_ehci_platdata
*pdata
;
60 struct s5p_ehci_hcd
*s5p_ehci
;
62 struct ehci_hcd
*ehci
;
67 pdata
= pdev
->dev
.platform_data
;
69 dev_err(&pdev
->dev
, "No platform data defined\n");
73 s5p_ehci
= kzalloc(sizeof(struct s5p_ehci_hcd
), GFP_KERNEL
);
77 s5p_ehci
->dev
= &pdev
->dev
;
79 hcd
= usb_create_hcd(&s5p_ehci_hc_driver
, &pdev
->dev
,
80 dev_name(&pdev
->dev
));
82 dev_err(&pdev
->dev
, "Unable to create HCD\n");
88 s5p_ehci
->clk
= clk_get(&pdev
->dev
, "usbhost");
90 if (IS_ERR(s5p_ehci
->clk
)) {
91 dev_err(&pdev
->dev
, "Failed to get usbhost clock\n");
92 err
= PTR_ERR(s5p_ehci
->clk
);
96 err
= clk_enable(s5p_ehci
->clk
);
100 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
102 dev_err(&pdev
->dev
, "Failed to get I/O memory\n");
107 hcd
->rsrc_start
= res
->start
;
108 hcd
->rsrc_len
= resource_size(res
);
109 hcd
->regs
= ioremap(res
->start
, resource_size(res
));
111 dev_err(&pdev
->dev
, "Failed to remap I/O memory\n");
116 irq
= platform_get_irq(pdev
, 0);
118 dev_err(&pdev
->dev
, "Failed to get IRQ\n");
124 pdata
->phy_init(pdev
, S5P_USB_PHY_HOST
);
126 ehci
= hcd_to_ehci(hcd
);
127 ehci
->caps
= hcd
->regs
;
128 ehci
->regs
= hcd
->regs
+
129 HC_LENGTH(ehci
, readl(&ehci
->caps
->hc_capbase
));
131 dbg_hcs_params(ehci
, "reset");
132 dbg_hcc_params(ehci
, "reset");
134 /* cache this readonly data; minimize chip reads */
135 ehci
->hcs_params
= readl(&ehci
->caps
->hcs_params
);
139 err
= usb_add_hcd(hcd
, irq
, IRQF_SHARED
);
141 dev_err(&pdev
->dev
, "Failed to add USB HCD\n");
145 platform_set_drvdata(pdev
, s5p_ehci
);
152 clk_disable(s5p_ehci
->clk
);
154 clk_put(s5p_ehci
->clk
);
162 static int __devexit
s5p_ehci_remove(struct platform_device
*pdev
)
164 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
165 struct s5p_ehci_hcd
*s5p_ehci
= platform_get_drvdata(pdev
);
166 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
170 if (pdata
&& pdata
->phy_exit
)
171 pdata
->phy_exit(pdev
, S5P_USB_PHY_HOST
);
175 clk_disable(s5p_ehci
->clk
);
176 clk_put(s5p_ehci
->clk
);
184 static void s5p_ehci_shutdown(struct platform_device
*pdev
)
186 struct s5p_ehci_hcd
*s5p_ehci
= platform_get_drvdata(pdev
);
187 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
189 if (hcd
->driver
->shutdown
)
190 hcd
->driver
->shutdown(hcd
);
194 static int s5p_ehci_suspend(struct device
*dev
)
196 struct s5p_ehci_hcd
*s5p_ehci
= dev_get_drvdata(dev
);
197 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
198 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
199 struct platform_device
*pdev
= to_platform_device(dev
);
200 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
204 if (time_before(jiffies
, ehci
->next_statechange
))
208 * Root hub was already suspended. Disable irq emission and
209 * mark HW unaccessible. The PM and USB cores make sure that
210 * the root hub is either suspended or stopped.
212 ehci_prepare_ports_for_controller_suspend(ehci
, device_may_wakeup(dev
));
213 spin_lock_irqsave(&ehci
->lock
, flags
);
214 ehci_writel(ehci
, 0, &ehci
->regs
->intr_enable
);
215 (void)ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
217 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
218 spin_unlock_irqrestore(&ehci
->lock
, flags
);
220 if (pdata
&& pdata
->phy_exit
)
221 pdata
->phy_exit(pdev
, S5P_USB_PHY_HOST
);
226 static int s5p_ehci_resume(struct device
*dev
)
228 struct s5p_ehci_hcd
*s5p_ehci
= dev_get_drvdata(dev
);
229 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
230 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
231 struct platform_device
*pdev
= to_platform_device(dev
);
232 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
234 if (pdata
&& pdata
->phy_init
)
235 pdata
->phy_init(pdev
, S5P_USB_PHY_HOST
);
237 if (time_before(jiffies
, ehci
->next_statechange
))
240 /* Mark hardware accessible again as we are out of D3 state by now */
241 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
243 if (ehci_readl(ehci
, &ehci
->regs
->configured_flag
) == FLAG_CF
) {
244 int mask
= INTR_MASK
;
246 ehci_prepare_ports_for_controller_resume(ehci
);
247 if (!hcd
->self
.root_hub
->do_remote_wakeup
)
249 ehci_writel(ehci
, mask
, &ehci
->regs
->intr_enable
);
250 ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
254 usb_root_hub_lost_power(hcd
->self
.root_hub
);
256 (void) ehci_halt(ehci
);
257 (void) ehci_reset(ehci
);
259 /* emptying the schedule aborts any urbs */
260 spin_lock_irq(&ehci
->lock
);
262 end_unlink_async(ehci
);
264 spin_unlock_irq(&ehci
->lock
);
266 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
267 ehci_writel(ehci
, FLAG_CF
, &ehci
->regs
->configured_flag
);
268 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted writes */
270 /* here we "know" root ports should always stay powered */
271 ehci_port_power(ehci
, 1);
273 ehci
->rh_state
= EHCI_RH_SUSPENDED
;
278 #define s5p_ehci_suspend NULL
279 #define s5p_ehci_resume NULL
282 static const struct dev_pm_ops s5p_ehci_pm_ops
= {
283 .suspend
= s5p_ehci_suspend
,
284 .resume
= s5p_ehci_resume
,
287 static struct platform_driver s5p_ehci_driver
= {
288 .probe
= s5p_ehci_probe
,
289 .remove
= __devexit_p(s5p_ehci_remove
),
290 .shutdown
= s5p_ehci_shutdown
,
293 .owner
= THIS_MODULE
,
294 .pm
= &s5p_ehci_pm_ops
,
298 MODULE_ALIAS("platform:s5p-ehci");