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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> | |
2c026e2b | 16 | #include <linux/of.h> |
1bcc5aa8 | 17 | #include <linux/platform_device.h> |
fd81d59c | 18 | #include <linux/of_gpio.h> |
1bcc5aa8 JS |
19 | #include <plat/ehci.h> |
20 | #include <plat/usb-phy.h> | |
21 | ||
88555a63 JH |
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) | |
30 | ||
1bcc5aa8 JS |
31 | struct s5p_ehci_hcd { |
32 | struct device *dev; | |
33 | struct usb_hcd *hcd; | |
34 | struct clk *clk; | |
35 | }; | |
36 | ||
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), | |
41 | ||
42 | .irq = ehci_irq, | |
43 | .flags = HCD_MEMORY | HCD_USB2, | |
44 | ||
1a49e2ac | 45 | .reset = ehci_setup, |
1bcc5aa8 JS |
46 | .start = ehci_run, |
47 | .stop = ehci_stop, | |
48 | .shutdown = ehci_shutdown, | |
49 | ||
50 | .get_frame_number = ehci_get_frame, | |
51 | ||
52 | .urb_enqueue = ehci_urb_enqueue, | |
53 | .urb_dequeue = ehci_urb_dequeue, | |
54 | .endpoint_disable = ehci_endpoint_disable, | |
55 | .endpoint_reset = ehci_endpoint_reset, | |
56 | ||
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, | |
61 | ||
62 | .relinquish_port = ehci_relinquish_port, | |
63 | .port_handed_over = ehci_port_handed_over, | |
64 | ||
65 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
66 | }; | |
67 | ||
fd81d59c VG |
68 | static void s5p_setup_vbus_gpio(struct platform_device *pdev) |
69 | { | |
70 | int err; | |
71 | int gpio; | |
72 | ||
73 | if (!pdev->dev.of_node) | |
74 | return; | |
75 | ||
76 | gpio = of_get_named_gpio(pdev->dev.of_node, | |
77 | "samsung,vbus-gpio", 0); | |
78 | if (!gpio_is_valid(gpio)) | |
79 | return; | |
80 | ||
81 | err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio"); | |
82 | if (err) | |
83 | dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio); | |
84 | } | |
85 | ||
2c026e2b VG |
86 | static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32); |
87 | ||
27362d46 | 88 | static int __devinit s5p_ehci_probe(struct platform_device *pdev) |
1bcc5aa8 JS |
89 | { |
90 | struct s5p_ehci_platdata *pdata; | |
91 | struct s5p_ehci_hcd *s5p_ehci; | |
92 | struct usb_hcd *hcd; | |
93 | struct ehci_hcd *ehci; | |
94 | struct resource *res; | |
95 | int irq; | |
96 | int err; | |
97 | ||
98 | pdata = pdev->dev.platform_data; | |
99 | if (!pdata) { | |
100 | dev_err(&pdev->dev, "No platform data defined\n"); | |
101 | return -EINVAL; | |
102 | } | |
103 | ||
2c026e2b VG |
104 | /* |
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. | |
108 | */ | |
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); | |
113 | ||
fd81d59c VG |
114 | s5p_setup_vbus_gpio(pdev); |
115 | ||
9cb07563 JH |
116 | s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd), |
117 | GFP_KERNEL); | |
1bcc5aa8 JS |
118 | if (!s5p_ehci) |
119 | return -ENOMEM; | |
120 | ||
121 | s5p_ehci->dev = &pdev->dev; | |
122 | ||
123 | hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev, | |
124 | dev_name(&pdev->dev)); | |
125 | if (!hcd) { | |
126 | dev_err(&pdev->dev, "Unable to create HCD\n"); | |
9cb07563 | 127 | return -ENOMEM; |
1bcc5aa8 JS |
128 | } |
129 | ||
e5d3d446 | 130 | s5p_ehci->hcd = hcd; |
1bcc5aa8 JS |
131 | s5p_ehci->clk = clk_get(&pdev->dev, "usbhost"); |
132 | ||
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); | |
136 | goto fail_clk; | |
137 | } | |
138 | ||
139 | err = clk_enable(s5p_ehci->clk); | |
140 | if (err) | |
141 | goto fail_clken; | |
142 | ||
143 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
144 | if (!res) { | |
145 | dev_err(&pdev->dev, "Failed to get I/O memory\n"); | |
146 | err = -ENXIO; | |
147 | goto fail_io; | |
148 | } | |
149 | ||
150 | hcd->rsrc_start = res->start; | |
151 | hcd->rsrc_len = resource_size(res); | |
9cb07563 | 152 | hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len); |
1bcc5aa8 JS |
153 | if (!hcd->regs) { |
154 | dev_err(&pdev->dev, "Failed to remap I/O memory\n"); | |
155 | err = -ENOMEM; | |
156 | goto fail_io; | |
157 | } | |
158 | ||
159 | irq = platform_get_irq(pdev, 0); | |
160 | if (!irq) { | |
161 | dev_err(&pdev->dev, "Failed to get IRQ\n"); | |
162 | err = -ENODEV; | |
9cb07563 | 163 | goto fail_io; |
1bcc5aa8 JS |
164 | } |
165 | ||
166 | if (pdata->phy_init) | |
167 | pdata->phy_init(pdev, S5P_USB_PHY_HOST); | |
168 | ||
169 | ehci = hcd_to_ehci(hcd); | |
170 | ehci->caps = hcd->regs; | |
1bcc5aa8 | 171 | |
88555a63 JH |
172 | /* DMA burst Enable */ |
173 | writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); | |
174 | ||
b5dd18d8 | 175 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1bcc5aa8 JS |
176 | if (err) { |
177 | dev_err(&pdev->dev, "Failed to add USB HCD\n"); | |
9cb07563 | 178 | goto fail_io; |
1bcc5aa8 JS |
179 | } |
180 | ||
181 | platform_set_drvdata(pdev, s5p_ehci); | |
182 | ||
183 | return 0; | |
184 | ||
1bcc5aa8 JS |
185 | fail_io: |
186 | clk_disable(s5p_ehci->clk); | |
187 | fail_clken: | |
188 | clk_put(s5p_ehci->clk); | |
189 | fail_clk: | |
190 | usb_put_hcd(hcd); | |
1bcc5aa8 JS |
191 | return err; |
192 | } | |
193 | ||
27362d46 | 194 | static int __devexit s5p_ehci_remove(struct platform_device *pdev) |
1bcc5aa8 JS |
195 | { |
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; | |
199 | ||
200 | usb_remove_hcd(hcd); | |
201 | ||
202 | if (pdata && pdata->phy_exit) | |
203 | pdata->phy_exit(pdev, S5P_USB_PHY_HOST); | |
204 | ||
1bcc5aa8 JS |
205 | clk_disable(s5p_ehci->clk); |
206 | clk_put(s5p_ehci->clk); | |
207 | ||
208 | usb_put_hcd(hcd); | |
1bcc5aa8 JS |
209 | |
210 | return 0; | |
211 | } | |
212 | ||
213 | static void s5p_ehci_shutdown(struct platform_device *pdev) | |
214 | { | |
215 | struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); | |
216 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
217 | ||
218 | if (hcd->driver->shutdown) | |
219 | hcd->driver->shutdown(hcd); | |
220 | } | |
221 | ||
1acb30ef JH |
222 | #ifdef CONFIG_PM |
223 | static int s5p_ehci_suspend(struct device *dev) | |
224 | { | |
225 | struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); | |
226 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
c5cf9212 | 227 | bool do_wakeup = device_may_wakeup(dev); |
1acb30ef JH |
228 | struct platform_device *pdev = to_platform_device(dev); |
229 | struct s5p_ehci_platdata *pdata = pdev->dev.platform_data; | |
c5cf9212 | 230 | int rc; |
1acb30ef | 231 | |
c5cf9212 | 232 | rc = ehci_suspend(hcd, do_wakeup); |
1acb30ef JH |
233 | |
234 | if (pdata && pdata->phy_exit) | |
235 | pdata->phy_exit(pdev, S5P_USB_PHY_HOST); | |
236 | ||
8b4fc8c7 JH |
237 | clk_disable(s5p_ehci->clk); |
238 | ||
1acb30ef JH |
239 | return rc; |
240 | } | |
241 | ||
242 | static int s5p_ehci_resume(struct device *dev) | |
243 | { | |
244 | struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); | |
245 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
1acb30ef JH |
246 | struct platform_device *pdev = to_platform_device(dev); |
247 | struct s5p_ehci_platdata *pdata = pdev->dev.platform_data; | |
248 | ||
8b4fc8c7 JH |
249 | clk_enable(s5p_ehci->clk); |
250 | ||
1acb30ef JH |
251 | if (pdata && pdata->phy_init) |
252 | pdata->phy_init(pdev, S5P_USB_PHY_HOST); | |
253 | ||
88555a63 JH |
254 | /* DMA burst Enable */ |
255 | writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); | |
256 | ||
c5cf9212 | 257 | ehci_resume(hcd, false); |
1acb30ef JH |
258 | return 0; |
259 | } | |
260 | #else | |
261 | #define s5p_ehci_suspend NULL | |
262 | #define s5p_ehci_resume NULL | |
263 | #endif | |
264 | ||
265 | static const struct dev_pm_ops s5p_ehci_pm_ops = { | |
266 | .suspend = s5p_ehci_suspend, | |
267 | .resume = s5p_ehci_resume, | |
268 | }; | |
269 | ||
2c026e2b VG |
270 | #ifdef CONFIG_OF |
271 | static const struct of_device_id exynos_ehci_match[] = { | |
272 | { .compatible = "samsung,exynos-ehci" }, | |
273 | {}, | |
274 | }; | |
275 | MODULE_DEVICE_TABLE(of, exynos_ehci_match); | |
276 | #endif | |
277 | ||
1bcc5aa8 JS |
278 | static struct platform_driver s5p_ehci_driver = { |
279 | .probe = s5p_ehci_probe, | |
27362d46 | 280 | .remove = __devexit_p(s5p_ehci_remove), |
1bcc5aa8 JS |
281 | .shutdown = s5p_ehci_shutdown, |
282 | .driver = { | |
283 | .name = "s5p-ehci", | |
284 | .owner = THIS_MODULE, | |
1acb30ef | 285 | .pm = &s5p_ehci_pm_ops, |
2c026e2b | 286 | .of_match_table = of_match_ptr(exynos_ehci_match), |
1bcc5aa8 JS |
287 | } |
288 | }; | |
289 | ||
290 | MODULE_ALIAS("platform:s5p-ehci"); |