Commit | Line | Data |
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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> |
436d42c6 | 19 | #include <linux/platform_data/usb-ehci-s5p.h> |
d233c196 | 20 | #include <linux/usb/phy.h> |
b506eebc | 21 | #include <linux/usb/samsung_usb_phy.h> |
1bcc5aa8 JS |
22 | #include <plat/usb-phy.h> |
23 | ||
88555a63 JH |
24 | #define EHCI_INSNREG00(base) (base + 0x90) |
25 | #define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25) | |
26 | #define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24) | |
27 | #define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23) | |
28 | #define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22) | |
29 | #define EHCI_INSNREG00_ENABLE_DMA_BURST \ | |
30 | (EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 | \ | |
31 | EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN) | |
32 | ||
1bcc5aa8 JS |
33 | struct s5p_ehci_hcd { |
34 | struct device *dev; | |
35 | struct usb_hcd *hcd; | |
36 | struct clk *clk; | |
d233c196 VG |
37 | struct usb_phy *phy; |
38 | struct usb_otg *otg; | |
39 | struct s5p_ehci_platdata *pdata; | |
1bcc5aa8 JS |
40 | }; |
41 | ||
42 | static const struct hc_driver s5p_ehci_hc_driver = { | |
43 | .description = hcd_name, | |
44 | .product_desc = "S5P EHCI Host Controller", | |
45 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
46 | ||
47 | .irq = ehci_irq, | |
48 | .flags = HCD_MEMORY | HCD_USB2, | |
49 | ||
1a49e2ac | 50 | .reset = ehci_setup, |
1bcc5aa8 JS |
51 | .start = ehci_run, |
52 | .stop = ehci_stop, | |
53 | .shutdown = ehci_shutdown, | |
54 | ||
55 | .get_frame_number = ehci_get_frame, | |
56 | ||
57 | .urb_enqueue = ehci_urb_enqueue, | |
58 | .urb_dequeue = ehci_urb_dequeue, | |
59 | .endpoint_disable = ehci_endpoint_disable, | |
60 | .endpoint_reset = ehci_endpoint_reset, | |
61 | ||
62 | .hub_status_data = ehci_hub_status_data, | |
63 | .hub_control = ehci_hub_control, | |
64 | .bus_suspend = ehci_bus_suspend, | |
65 | .bus_resume = ehci_bus_resume, | |
66 | ||
67 | .relinquish_port = ehci_relinquish_port, | |
68 | .port_handed_over = ehci_port_handed_over, | |
69 | ||
70 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
71 | }; | |
72 | ||
d233c196 VG |
73 | static void s5p_ehci_phy_enable(struct s5p_ehci_hcd *s5p_ehci) |
74 | { | |
75 | struct platform_device *pdev = to_platform_device(s5p_ehci->dev); | |
76 | ||
77 | if (s5p_ehci->phy) | |
78 | usb_phy_init(s5p_ehci->phy); | |
79 | else if (s5p_ehci->pdata->phy_init) | |
80 | s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); | |
81 | } | |
82 | ||
83 | static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci) | |
84 | { | |
85 | struct platform_device *pdev = to_platform_device(s5p_ehci->dev); | |
86 | ||
87 | if (s5p_ehci->phy) | |
88 | usb_phy_shutdown(s5p_ehci->phy); | |
89 | else if (s5p_ehci->pdata->phy_exit) | |
90 | s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); | |
91 | } | |
92 | ||
fd81d59c VG |
93 | static void s5p_setup_vbus_gpio(struct platform_device *pdev) |
94 | { | |
95 | int err; | |
96 | int gpio; | |
97 | ||
98 | if (!pdev->dev.of_node) | |
99 | return; | |
100 | ||
101 | gpio = of_get_named_gpio(pdev->dev.of_node, | |
102 | "samsung,vbus-gpio", 0); | |
103 | if (!gpio_is_valid(gpio)) | |
104 | return; | |
105 | ||
106 | err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio"); | |
107 | if (err) | |
108 | dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio); | |
109 | } | |
110 | ||
2c026e2b VG |
111 | static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32); |
112 | ||
41ac7b3a | 113 | static int s5p_ehci_probe(struct platform_device *pdev) |
1bcc5aa8 | 114 | { |
d233c196 | 115 | struct s5p_ehci_platdata *pdata = pdev->dev.platform_data; |
1bcc5aa8 JS |
116 | struct s5p_ehci_hcd *s5p_ehci; |
117 | struct usb_hcd *hcd; | |
118 | struct ehci_hcd *ehci; | |
119 | struct resource *res; | |
d233c196 | 120 | struct usb_phy *phy; |
1bcc5aa8 JS |
121 | int irq; |
122 | int err; | |
123 | ||
2c026e2b VG |
124 | /* |
125 | * Right now device-tree probed devices don't get dma_mask set. | |
126 | * Since shared usb code relies on it, set it here for now. | |
127 | * Once we move to full device tree support this will vanish off. | |
128 | */ | |
129 | if (!pdev->dev.dma_mask) | |
130 | pdev->dev.dma_mask = &ehci_s5p_dma_mask; | |
131 | if (!pdev->dev.coherent_dma_mask) | |
132 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
133 | ||
fd81d59c VG |
134 | s5p_setup_vbus_gpio(pdev); |
135 | ||
9cb07563 JH |
136 | s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd), |
137 | GFP_KERNEL); | |
1bcc5aa8 JS |
138 | if (!s5p_ehci) |
139 | return -ENOMEM; | |
140 | ||
d233c196 VG |
141 | phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); |
142 | if (IS_ERR_OR_NULL(phy)) { | |
143 | /* Fallback to pdata */ | |
144 | if (!pdata) { | |
145 | dev_warn(&pdev->dev, "no platform data or transceiver defined\n"); | |
146 | return -EPROBE_DEFER; | |
147 | } else { | |
148 | s5p_ehci->pdata = pdata; | |
149 | } | |
150 | } else { | |
151 | s5p_ehci->phy = phy; | |
152 | s5p_ehci->otg = phy->otg; | |
153 | } | |
154 | ||
1bcc5aa8 JS |
155 | s5p_ehci->dev = &pdev->dev; |
156 | ||
157 | hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev, | |
158 | dev_name(&pdev->dev)); | |
159 | if (!hcd) { | |
160 | dev_err(&pdev->dev, "Unable to create HCD\n"); | |
9cb07563 | 161 | return -ENOMEM; |
1bcc5aa8 JS |
162 | } |
163 | ||
e5d3d446 | 164 | s5p_ehci->hcd = hcd; |
63fd0ae4 | 165 | s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost"); |
1bcc5aa8 JS |
166 | |
167 | if (IS_ERR(s5p_ehci->clk)) { | |
168 | dev_err(&pdev->dev, "Failed to get usbhost clock\n"); | |
169 | err = PTR_ERR(s5p_ehci->clk); | |
170 | goto fail_clk; | |
171 | } | |
172 | ||
e1deb56c | 173 | err = clk_prepare_enable(s5p_ehci->clk); |
1bcc5aa8 | 174 | if (err) |
63fd0ae4 | 175 | goto fail_clk; |
1bcc5aa8 JS |
176 | |
177 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
178 | if (!res) { | |
179 | dev_err(&pdev->dev, "Failed to get I/O memory\n"); | |
180 | err = -ENXIO; | |
181 | goto fail_io; | |
182 | } | |
183 | ||
184 | hcd->rsrc_start = res->start; | |
185 | hcd->rsrc_len = resource_size(res); | |
9cb07563 | 186 | hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len); |
1bcc5aa8 JS |
187 | if (!hcd->regs) { |
188 | dev_err(&pdev->dev, "Failed to remap I/O memory\n"); | |
189 | err = -ENOMEM; | |
190 | goto fail_io; | |
191 | } | |
192 | ||
193 | irq = platform_get_irq(pdev, 0); | |
194 | if (!irq) { | |
195 | dev_err(&pdev->dev, "Failed to get IRQ\n"); | |
196 | err = -ENODEV; | |
9cb07563 | 197 | goto fail_io; |
1bcc5aa8 JS |
198 | } |
199 | ||
d233c196 VG |
200 | if (s5p_ehci->otg) |
201 | s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); | |
202 | ||
203 | s5p_ehci_phy_enable(s5p_ehci); | |
1bcc5aa8 JS |
204 | |
205 | ehci = hcd_to_ehci(hcd); | |
206 | ehci->caps = hcd->regs; | |
1bcc5aa8 | 207 | |
88555a63 JH |
208 | /* DMA burst Enable */ |
209 | writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); | |
210 | ||
b5dd18d8 | 211 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1bcc5aa8 JS |
212 | if (err) { |
213 | dev_err(&pdev->dev, "Failed to add USB HCD\n"); | |
d233c196 | 214 | goto fail_add_hcd; |
1bcc5aa8 JS |
215 | } |
216 | ||
217 | platform_set_drvdata(pdev, s5p_ehci); | |
218 | ||
219 | return 0; | |
220 | ||
d233c196 VG |
221 | fail_add_hcd: |
222 | s5p_ehci_phy_disable(s5p_ehci); | |
1bcc5aa8 | 223 | fail_io: |
e1deb56c | 224 | clk_disable_unprepare(s5p_ehci->clk); |
1bcc5aa8 JS |
225 | fail_clk: |
226 | usb_put_hcd(hcd); | |
1bcc5aa8 JS |
227 | return err; |
228 | } | |
229 | ||
fb4e98ab | 230 | static int s5p_ehci_remove(struct platform_device *pdev) |
1bcc5aa8 | 231 | { |
1bcc5aa8 JS |
232 | struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); |
233 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
234 | ||
235 | usb_remove_hcd(hcd); | |
236 | ||
d233c196 VG |
237 | if (s5p_ehci->otg) |
238 | s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); | |
239 | ||
240 | s5p_ehci_phy_disable(s5p_ehci); | |
1bcc5aa8 | 241 | |
e1deb56c | 242 | clk_disable_unprepare(s5p_ehci->clk); |
1bcc5aa8 JS |
243 | |
244 | usb_put_hcd(hcd); | |
1bcc5aa8 JS |
245 | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static void s5p_ehci_shutdown(struct platform_device *pdev) | |
250 | { | |
251 | struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); | |
252 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
253 | ||
254 | if (hcd->driver->shutdown) | |
255 | hcd->driver->shutdown(hcd); | |
256 | } | |
257 | ||
1acb30ef JH |
258 | #ifdef CONFIG_PM |
259 | static int s5p_ehci_suspend(struct device *dev) | |
260 | { | |
261 | struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); | |
262 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
c5cf9212 | 263 | bool do_wakeup = device_may_wakeup(dev); |
c5cf9212 | 264 | int rc; |
1acb30ef | 265 | |
c5cf9212 | 266 | rc = ehci_suspend(hcd, do_wakeup); |
1acb30ef | 267 | |
d233c196 VG |
268 | if (s5p_ehci->otg) |
269 | s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); | |
270 | ||
271 | s5p_ehci_phy_disable(s5p_ehci); | |
1acb30ef | 272 | |
e1deb56c | 273 | clk_disable_unprepare(s5p_ehci->clk); |
8b4fc8c7 | 274 | |
1acb30ef JH |
275 | return rc; |
276 | } | |
277 | ||
278 | static int s5p_ehci_resume(struct device *dev) | |
279 | { | |
280 | struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); | |
281 | struct usb_hcd *hcd = s5p_ehci->hcd; | |
1acb30ef | 282 | |
e1deb56c | 283 | clk_prepare_enable(s5p_ehci->clk); |
8b4fc8c7 | 284 | |
d233c196 VG |
285 | if (s5p_ehci->otg) |
286 | s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); | |
287 | ||
288 | s5p_ehci_phy_enable(s5p_ehci); | |
1acb30ef | 289 | |
88555a63 JH |
290 | /* DMA burst Enable */ |
291 | writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); | |
292 | ||
c5cf9212 | 293 | ehci_resume(hcd, false); |
1acb30ef JH |
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 | ||
2c026e2b VG |
306 | #ifdef CONFIG_OF |
307 | static const struct of_device_id exynos_ehci_match[] = { | |
6e247777 | 308 | { .compatible = "samsung,exynos4210-ehci" }, |
2c026e2b VG |
309 | {}, |
310 | }; | |
311 | MODULE_DEVICE_TABLE(of, exynos_ehci_match); | |
312 | #endif | |
313 | ||
1bcc5aa8 JS |
314 | static struct platform_driver s5p_ehci_driver = { |
315 | .probe = s5p_ehci_probe, | |
7690417d | 316 | .remove = s5p_ehci_remove, |
1bcc5aa8 JS |
317 | .shutdown = s5p_ehci_shutdown, |
318 | .driver = { | |
319 | .name = "s5p-ehci", | |
320 | .owner = THIS_MODULE, | |
1acb30ef | 321 | .pm = &s5p_ehci_pm_ops, |
2c026e2b | 322 | .of_match_table = of_match_ptr(exynos_ehci_match), |
1bcc5aa8 JS |
323 | } |
324 | }; | |
325 | ||
326 | MODULE_ALIAS("platform:s5p-ehci"); |