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>
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)
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
),
41 .flags
= HCD_MEMORY
| HCD_USB2
,
46 .shutdown
= ehci_shutdown
,
48 .get_frame_number
= ehci_get_frame
,
50 .urb_enqueue
= ehci_urb_enqueue
,
51 .urb_dequeue
= ehci_urb_dequeue
,
52 .endpoint_disable
= ehci_endpoint_disable
,
53 .endpoint_reset
= ehci_endpoint_reset
,
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
,
60 .relinquish_port
= ehci_relinquish_port
,
61 .port_handed_over
= ehci_port_handed_over
,
63 .clear_tt_buffer_complete
= ehci_clear_tt_buffer_complete
,
66 static int __devinit
s5p_ehci_probe(struct platform_device
*pdev
)
68 struct s5p_ehci_platdata
*pdata
;
69 struct s5p_ehci_hcd
*s5p_ehci
;
71 struct ehci_hcd
*ehci
;
76 pdata
= pdev
->dev
.platform_data
;
78 dev_err(&pdev
->dev
, "No platform data defined\n");
82 s5p_ehci
= devm_kzalloc(&pdev
->dev
, sizeof(struct s5p_ehci_hcd
),
87 s5p_ehci
->dev
= &pdev
->dev
;
89 hcd
= usb_create_hcd(&s5p_ehci_hc_driver
, &pdev
->dev
,
90 dev_name(&pdev
->dev
));
92 dev_err(&pdev
->dev
, "Unable to create HCD\n");
97 s5p_ehci
->clk
= clk_get(&pdev
->dev
, "usbhost");
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
);
105 err
= clk_enable(s5p_ehci
->clk
);
109 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
111 dev_err(&pdev
->dev
, "Failed to get I/O memory\n");
116 hcd
->rsrc_start
= res
->start
;
117 hcd
->rsrc_len
= resource_size(res
);
118 hcd
->regs
= devm_ioremap(&pdev
->dev
, res
->start
, hcd
->rsrc_len
);
120 dev_err(&pdev
->dev
, "Failed to remap I/O memory\n");
125 irq
= platform_get_irq(pdev
, 0);
127 dev_err(&pdev
->dev
, "Failed to get IRQ\n");
133 pdata
->phy_init(pdev
, S5P_USB_PHY_HOST
);
135 ehci
= hcd_to_ehci(hcd
);
136 ehci
->caps
= hcd
->regs
;
137 ehci
->regs
= hcd
->regs
+
138 HC_LENGTH(ehci
, readl(&ehci
->caps
->hc_capbase
));
140 /* DMA burst Enable */
141 writel(EHCI_INSNREG00_ENABLE_DMA_BURST
, EHCI_INSNREG00(hcd
->regs
));
143 dbg_hcs_params(ehci
, "reset");
144 dbg_hcc_params(ehci
, "reset");
146 /* cache this readonly data; minimize chip reads */
147 ehci
->hcs_params
= readl(&ehci
->caps
->hcs_params
);
151 err
= usb_add_hcd(hcd
, irq
, IRQF_SHARED
);
153 dev_err(&pdev
->dev
, "Failed to add USB HCD\n");
157 platform_set_drvdata(pdev
, s5p_ehci
);
162 clk_disable(s5p_ehci
->clk
);
164 clk_put(s5p_ehci
->clk
);
170 static int __devexit
s5p_ehci_remove(struct platform_device
*pdev
)
172 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
173 struct s5p_ehci_hcd
*s5p_ehci
= platform_get_drvdata(pdev
);
174 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
178 if (pdata
&& pdata
->phy_exit
)
179 pdata
->phy_exit(pdev
, S5P_USB_PHY_HOST
);
181 clk_disable(s5p_ehci
->clk
);
182 clk_put(s5p_ehci
->clk
);
189 static void s5p_ehci_shutdown(struct platform_device
*pdev
)
191 struct s5p_ehci_hcd
*s5p_ehci
= platform_get_drvdata(pdev
);
192 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
194 if (hcd
->driver
->shutdown
)
195 hcd
->driver
->shutdown(hcd
);
199 static int s5p_ehci_suspend(struct device
*dev
)
201 struct s5p_ehci_hcd
*s5p_ehci
= dev_get_drvdata(dev
);
202 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
203 bool do_wakeup
= device_may_wakeup(dev
);
204 struct platform_device
*pdev
= to_platform_device(dev
);
205 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
208 rc
= ehci_suspend(hcd
, do_wakeup
);
210 if (pdata
&& pdata
->phy_exit
)
211 pdata
->phy_exit(pdev
, S5P_USB_PHY_HOST
);
213 clk_disable(s5p_ehci
->clk
);
218 static int s5p_ehci_resume(struct device
*dev
)
220 struct s5p_ehci_hcd
*s5p_ehci
= dev_get_drvdata(dev
);
221 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
222 struct platform_device
*pdev
= to_platform_device(dev
);
223 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
225 clk_enable(s5p_ehci
->clk
);
227 if (pdata
&& pdata
->phy_init
)
228 pdata
->phy_init(pdev
, S5P_USB_PHY_HOST
);
230 /* DMA burst Enable */
231 writel(EHCI_INSNREG00_ENABLE_DMA_BURST
, EHCI_INSNREG00(hcd
->regs
));
233 ehci_resume(hcd
, false);
237 #define s5p_ehci_suspend NULL
238 #define s5p_ehci_resume NULL
241 static const struct dev_pm_ops s5p_ehci_pm_ops
= {
242 .suspend
= s5p_ehci_suspend
,
243 .resume
= s5p_ehci_resume
,
246 static struct platform_driver s5p_ehci_driver
= {
247 .probe
= s5p_ehci_probe
,
248 .remove
= __devexit_p(s5p_ehci_remove
),
249 .shutdown
= s5p_ehci_shutdown
,
252 .owner
= THIS_MODULE
,
253 .pm
= &s5p_ehci_pm_ops
,
257 MODULE_ALIAS("platform:s5p-ehci");