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>
17 #include <linux/platform_device.h>
18 #include <linux/of_gpio.h>
19 #include <plat/ehci.h>
20 #include <plat/usb-phy.h>
22 #define EHCI_INSNREG00(base) (base + 0x90)
23 #define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
24 #define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24)
25 #define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23)
26 #define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22)
27 #define EHCI_INSNREG00_ENABLE_DMA_BURST \
28 (EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 | \
29 EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)
37 static const struct hc_driver s5p_ehci_hc_driver
= {
38 .description
= hcd_name
,
39 .product_desc
= "S5P EHCI Host Controller",
40 .hcd_priv_size
= sizeof(struct ehci_hcd
),
43 .flags
= HCD_MEMORY
| HCD_USB2
,
48 .shutdown
= ehci_shutdown
,
50 .get_frame_number
= ehci_get_frame
,
52 .urb_enqueue
= ehci_urb_enqueue
,
53 .urb_dequeue
= ehci_urb_dequeue
,
54 .endpoint_disable
= ehci_endpoint_disable
,
55 .endpoint_reset
= ehci_endpoint_reset
,
57 .hub_status_data
= ehci_hub_status_data
,
58 .hub_control
= ehci_hub_control
,
59 .bus_suspend
= ehci_bus_suspend
,
60 .bus_resume
= ehci_bus_resume
,
62 .relinquish_port
= ehci_relinquish_port
,
63 .port_handed_over
= ehci_port_handed_over
,
65 .clear_tt_buffer_complete
= ehci_clear_tt_buffer_complete
,
68 static void s5p_setup_vbus_gpio(struct platform_device
*pdev
)
73 if (!pdev
->dev
.of_node
)
76 gpio
= of_get_named_gpio(pdev
->dev
.of_node
,
77 "samsung,vbus-gpio", 0);
78 if (!gpio_is_valid(gpio
))
81 err
= gpio_request_one(gpio
, GPIOF_OUT_INIT_HIGH
, "ehci_vbus_gpio");
83 dev_err(&pdev
->dev
, "can't request ehci vbus gpio %d", gpio
);
86 static u64 ehci_s5p_dma_mask
= DMA_BIT_MASK(32);
88 static int __devinit
s5p_ehci_probe(struct platform_device
*pdev
)
90 struct s5p_ehci_platdata
*pdata
;
91 struct s5p_ehci_hcd
*s5p_ehci
;
93 struct ehci_hcd
*ehci
;
98 pdata
= pdev
->dev
.platform_data
;
100 dev_err(&pdev
->dev
, "No platform data defined\n");
105 * Right now device-tree probed devices don't get dma_mask set.
106 * Since shared usb code relies on it, set it here for now.
107 * Once we move to full device tree support this will vanish off.
109 if (!pdev
->dev
.dma_mask
)
110 pdev
->dev
.dma_mask
= &ehci_s5p_dma_mask
;
111 if (!pdev
->dev
.coherent_dma_mask
)
112 pdev
->dev
.coherent_dma_mask
= DMA_BIT_MASK(32);
114 s5p_setup_vbus_gpio(pdev
);
116 s5p_ehci
= devm_kzalloc(&pdev
->dev
, sizeof(struct s5p_ehci_hcd
),
121 s5p_ehci
->dev
= &pdev
->dev
;
123 hcd
= usb_create_hcd(&s5p_ehci_hc_driver
, &pdev
->dev
,
124 dev_name(&pdev
->dev
));
126 dev_err(&pdev
->dev
, "Unable to create HCD\n");
131 s5p_ehci
->clk
= clk_get(&pdev
->dev
, "usbhost");
133 if (IS_ERR(s5p_ehci
->clk
)) {
134 dev_err(&pdev
->dev
, "Failed to get usbhost clock\n");
135 err
= PTR_ERR(s5p_ehci
->clk
);
139 err
= clk_enable(s5p_ehci
->clk
);
143 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
145 dev_err(&pdev
->dev
, "Failed to get I/O memory\n");
150 hcd
->rsrc_start
= res
->start
;
151 hcd
->rsrc_len
= resource_size(res
);
152 hcd
->regs
= devm_ioremap(&pdev
->dev
, res
->start
, hcd
->rsrc_len
);
154 dev_err(&pdev
->dev
, "Failed to remap I/O memory\n");
159 irq
= platform_get_irq(pdev
, 0);
161 dev_err(&pdev
->dev
, "Failed to get IRQ\n");
167 pdata
->phy_init(pdev
, S5P_USB_PHY_HOST
);
169 ehci
= hcd_to_ehci(hcd
);
170 ehci
->caps
= hcd
->regs
;
172 /* DMA burst Enable */
173 writel(EHCI_INSNREG00_ENABLE_DMA_BURST
, EHCI_INSNREG00(hcd
->regs
));
175 err
= usb_add_hcd(hcd
, irq
, IRQF_SHARED
);
177 dev_err(&pdev
->dev
, "Failed to add USB HCD\n");
181 platform_set_drvdata(pdev
, s5p_ehci
);
186 clk_disable(s5p_ehci
->clk
);
188 clk_put(s5p_ehci
->clk
);
194 static int __devexit
s5p_ehci_remove(struct platform_device
*pdev
)
196 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
197 struct s5p_ehci_hcd
*s5p_ehci
= platform_get_drvdata(pdev
);
198 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
202 if (pdata
&& pdata
->phy_exit
)
203 pdata
->phy_exit(pdev
, S5P_USB_PHY_HOST
);
205 clk_disable(s5p_ehci
->clk
);
206 clk_put(s5p_ehci
->clk
);
213 static void s5p_ehci_shutdown(struct platform_device
*pdev
)
215 struct s5p_ehci_hcd
*s5p_ehci
= platform_get_drvdata(pdev
);
216 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
218 if (hcd
->driver
->shutdown
)
219 hcd
->driver
->shutdown(hcd
);
223 static int s5p_ehci_suspend(struct device
*dev
)
225 struct s5p_ehci_hcd
*s5p_ehci
= dev_get_drvdata(dev
);
226 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
227 bool do_wakeup
= device_may_wakeup(dev
);
228 struct platform_device
*pdev
= to_platform_device(dev
);
229 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
232 rc
= ehci_suspend(hcd
, do_wakeup
);
234 if (pdata
&& pdata
->phy_exit
)
235 pdata
->phy_exit(pdev
, S5P_USB_PHY_HOST
);
237 clk_disable(s5p_ehci
->clk
);
242 static int s5p_ehci_resume(struct device
*dev
)
244 struct s5p_ehci_hcd
*s5p_ehci
= dev_get_drvdata(dev
);
245 struct usb_hcd
*hcd
= s5p_ehci
->hcd
;
246 struct platform_device
*pdev
= to_platform_device(dev
);
247 struct s5p_ehci_platdata
*pdata
= pdev
->dev
.platform_data
;
249 clk_enable(s5p_ehci
->clk
);
251 if (pdata
&& pdata
->phy_init
)
252 pdata
->phy_init(pdev
, S5P_USB_PHY_HOST
);
254 /* DMA burst Enable */
255 writel(EHCI_INSNREG00_ENABLE_DMA_BURST
, EHCI_INSNREG00(hcd
->regs
));
257 ehci_resume(hcd
, false);
261 #define s5p_ehci_suspend NULL
262 #define s5p_ehci_resume NULL
265 static const struct dev_pm_ops s5p_ehci_pm_ops
= {
266 .suspend
= s5p_ehci_suspend
,
267 .resume
= s5p_ehci_resume
,
271 static const struct of_device_id exynos_ehci_match
[] = {
272 { .compatible
= "samsung,exynos-ehci" },
275 MODULE_DEVICE_TABLE(of
, exynos_ehci_match
);
278 static struct platform_driver s5p_ehci_driver
= {
279 .probe
= s5p_ehci_probe
,
280 .remove
= __devexit_p(s5p_ehci_remove
),
281 .shutdown
= s5p_ehci_shutdown
,
284 .owner
= THIS_MODULE
,
285 .pm
= &s5p_ehci_pm_ops
,
286 .of_match_table
= of_match_ptr(exynos_ehci_match
),
290 MODULE_ALIAS("platform:s5p-ehci");