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b0848aea PK |
1 | /* ehci-msm.c - HSUSB Host Controller Driver Implementation |
2 | * | |
18f53461 | 3 | * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved. |
b0848aea PK |
4 | * |
5 | * Partly derived from ehci-fsl.c and ehci-hcd.c | |
6 | * Copyright (c) 2000-2004 by David Brownell | |
7 | * Copyright (c) 2005 MontaVista Software | |
8 | * | |
9 | * All source code in this file is licensed under the following license except | |
10 | * where indicated. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License version 2 as published | |
14 | * by the Free Software Foundation. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
19 | * | |
20 | * See the GNU General Public License for more details. | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, you can find it at http://www.fsf.org | |
23 | */ | |
24 | ||
b0848aea PK |
25 | #include <linux/clk.h> |
26 | #include <linux/err.h> | |
8c68e84f MG |
27 | #include <linux/io.h> |
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/platform_device.h> | |
8bb6a164 | 31 | #include <linux/pm_runtime.h> |
b0848aea PK |
32 | #include <linux/usb/otg.h> |
33 | #include <linux/usb/msm_hsusb_hw.h> | |
8c68e84f MG |
34 | #include <linux/usb.h> |
35 | #include <linux/usb/hcd.h> | |
f13f0e65 | 36 | #include <linux/acpi.h> |
8c68e84f MG |
37 | |
38 | #include "ehci.h" | |
b0848aea PK |
39 | |
40 | #define MSM_USB_BASE (hcd->regs) | |
41 | ||
8c68e84f MG |
42 | #define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller" |
43 | ||
44 | static const char hcd_name[] = "ehci-msm"; | |
45 | static struct hc_driver __read_mostly msm_hc_driver; | |
b0848aea | 46 | |
b0848aea PK |
47 | static int ehci_msm_reset(struct usb_hcd *hcd) |
48 | { | |
49 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
50 | int retval; | |
51 | ||
52 | ehci->caps = USB_CAPLENGTH; | |
b0848aea | 53 | hcd->has_tt = 1; |
b0848aea | 54 | |
2cb30bb1 | 55 | retval = ehci_setup(hcd); |
b0848aea PK |
56 | if (retval) |
57 | return retval; | |
58 | ||
e8f55b91 JP |
59 | /* select ULPI phy and clear other status/control bits in PORTSC */ |
60 | writel(PORTSC_PTS_ULPI, USB_PORTSC); | |
b0848aea PK |
61 | /* bursts of unspecified length. */ |
62 | writel(0, USB_AHBBURST); | |
c56a2b2b AG |
63 | /* Use the AHB transactor, allow posted data writes */ |
64 | writel(0x8, USB_AHBMODE); | |
b0848aea PK |
65 | /* Disable streaming mode and select host mode */ |
66 | writel(0x13, USB_USBMODE); | |
132f5005 JP |
67 | /* Disable ULPI_TX_PKT_EN_CLR_FIX which is valid only for HSIC */ |
68 | writel(readl(USB_GENCONFIG_2) & ~ULPI_TX_PKT_EN_CLR_FIX, USB_GENCONFIG_2); | |
b0848aea | 69 | |
b0848aea PK |
70 | return 0; |
71 | } | |
72 | ||
b0848aea PK |
73 | static int ehci_msm_probe(struct platform_device *pdev) |
74 | { | |
75 | struct usb_hcd *hcd; | |
76 | struct resource *res; | |
e4f0da05 | 77 | struct usb_phy *phy; |
b0848aea PK |
78 | int ret; |
79 | ||
80 | dev_dbg(&pdev->dev, "ehci_msm proble\n"); | |
81 | ||
82 | hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev)); | |
83 | if (!hcd) { | |
84 | dev_err(&pdev->dev, "Unable to create HCD\n"); | |
85 | return -ENOMEM; | |
86 | } | |
87 | ||
0c43e9d8 AH |
88 | ret = platform_get_irq(pdev, 0); |
89 | if (ret < 0) { | |
b0848aea | 90 | dev_err(&pdev->dev, "Unable to get IRQ resource\n"); |
b0848aea PK |
91 | goto put_hcd; |
92 | } | |
0c43e9d8 | 93 | hcd->irq = ret; |
b0848aea PK |
94 | |
95 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
bb304b71 II |
96 | if (!res) { |
97 | dev_err(&pdev->dev, "Unable to get memory resource\n"); | |
98 | ret = -ENODEV; | |
b0848aea PK |
99 | goto put_hcd; |
100 | } | |
bb304b71 | 101 | |
e507bf57 VB |
102 | hcd->rsrc_start = res->start; |
103 | hcd->rsrc_len = resource_size(res); | |
bb304b71 II |
104 | hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len); |
105 | if (!hcd->regs) { | |
106 | dev_err(&pdev->dev, "ioremap failed\n"); | |
107 | ret = -ENOMEM; | |
108 | goto put_hcd; | |
109 | } | |
b0848aea PK |
110 | |
111 | /* | |
c4398ef6 JP |
112 | * If there is an OTG driver, let it take care of PHY initialization, |
113 | * clock management, powering up VBUS, mapping of registers address | |
114 | * space and power management. | |
b0848aea | 115 | */ |
0fc924bd II |
116 | if (pdev->dev.of_node) |
117 | phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); | |
118 | else | |
119 | phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); | |
120 | ||
e299bd93 | 121 | if (IS_ERR(phy)) { |
c4398ef6 JP |
122 | if (PTR_ERR(phy) == -EPROBE_DEFER) { |
123 | dev_err(&pdev->dev, "unable to find transceiver\n"); | |
124 | ret = -EPROBE_DEFER; | |
125 | goto put_hcd; | |
126 | } | |
127 | phy = NULL; | |
b0848aea PK |
128 | } |
129 | ||
3d46e73d | 130 | hcd->usb_phy = phy; |
b0848aea | 131 | device_init_wakeup(&pdev->dev, 1); |
8bb6a164 | 132 | |
c4398ef6 JP |
133 | if (phy && phy->otg) { |
134 | /* | |
135 | * MSM OTG driver takes care of adding the HCD and | |
136 | * placing hardware into low power mode via runtime PM. | |
137 | */ | |
138 | ret = otg_set_host(phy->otg, &hcd->self); | |
139 | if (ret < 0) { | |
140 | dev_err(&pdev->dev, "unable to register with transceiver\n"); | |
141 | goto put_hcd; | |
142 | } | |
143 | ||
144 | pm_runtime_no_callbacks(&pdev->dev); | |
145 | pm_runtime_enable(&pdev->dev); | |
146 | } else { | |
147 | ret = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED); | |
148 | if (ret) | |
149 | goto put_hcd; | |
150 | } | |
8c68e84f | 151 | |
b0848aea PK |
152 | return 0; |
153 | ||
b0848aea PK |
154 | put_hcd: |
155 | usb_put_hcd(hcd); | |
156 | ||
157 | return ret; | |
158 | } | |
159 | ||
fb4e98ab | 160 | static int ehci_msm_remove(struct platform_device *pdev) |
b0848aea PK |
161 | { |
162 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
163 | ||
164 | device_init_wakeup(&pdev->dev, 0); | |
8bb6a164 PK |
165 | pm_runtime_disable(&pdev->dev); |
166 | pm_runtime_set_suspended(&pdev->dev); | |
b0848aea | 167 | |
c4398ef6 JP |
168 | if (hcd->usb_phy && hcd->usb_phy->otg) |
169 | otg_set_host(hcd->usb_phy->otg, NULL); | |
170 | else | |
171 | usb_remove_hcd(hcd); | |
8c68e84f | 172 | |
b0848aea PK |
173 | usb_put_hcd(hcd); |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
8bb6a164 PK |
178 | #ifdef CONFIG_PM |
179 | static int ehci_msm_pm_suspend(struct device *dev) | |
180 | { | |
181 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
815c9d6a | 182 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
c5cf9212 | 183 | bool do_wakeup = device_may_wakeup(dev); |
8bb6a164 PK |
184 | |
185 | dev_dbg(dev, "ehci-msm PM suspend\n"); | |
186 | ||
815c9d6a AG |
187 | /* Only call ehci_suspend if ehci_setup has been done */ |
188 | if (ehci->sbrn) | |
189 | return ehci_suspend(hcd, do_wakeup); | |
190 | ||
191 | return 0; | |
8bb6a164 PK |
192 | } |
193 | ||
194 | static int ehci_msm_pm_resume(struct device *dev) | |
195 | { | |
196 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
815c9d6a | 197 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
8bb6a164 PK |
198 | |
199 | dev_dbg(dev, "ehci-msm PM resume\n"); | |
815c9d6a AG |
200 | |
201 | /* Only call ehci_resume if ehci_setup has been done */ | |
202 | if (ehci->sbrn) | |
203 | ehci_resume(hcd, false); | |
8bb6a164 PK |
204 | |
205 | return 0; | |
206 | } | |
815c9d6a | 207 | |
8bb6a164 PK |
208 | #else |
209 | #define ehci_msm_pm_suspend NULL | |
210 | #define ehci_msm_pm_resume NULL | |
211 | #endif | |
212 | ||
213 | static const struct dev_pm_ops ehci_msm_dev_pm_ops = { | |
214 | .suspend = ehci_msm_pm_suspend, | |
215 | .resume = ehci_msm_pm_resume, | |
216 | }; | |
217 | ||
f13f0e65 JP |
218 | static const struct acpi_device_id msm_ehci_acpi_ids[] = { |
219 | { "QCOM8040", 0 }, | |
220 | { } | |
221 | }; | |
222 | MODULE_DEVICE_TABLE(acpi, msm_ehci_acpi_ids); | |
223 | ||
3587fb3b | 224 | static const struct of_device_id msm_ehci_dt_match[] = { |
0fc924bd II |
225 | { .compatible = "qcom,ehci-host", }, |
226 | {} | |
227 | }; | |
228 | MODULE_DEVICE_TABLE(of, msm_ehci_dt_match); | |
229 | ||
b0848aea PK |
230 | static struct platform_driver ehci_msm_driver = { |
231 | .probe = ehci_msm_probe, | |
7690417d | 232 | .remove = ehci_msm_remove, |
4bb3cad7 | 233 | .shutdown = usb_hcd_platform_shutdown, |
b0848aea PK |
234 | .driver = { |
235 | .name = "msm_hsusb_host", | |
8bb6a164 | 236 | .pm = &ehci_msm_dev_pm_ops, |
0fc924bd | 237 | .of_match_table = msm_ehci_dt_match, |
f13f0e65 | 238 | .acpi_match_table = ACPI_PTR(msm_ehci_acpi_ids), |
b0848aea PK |
239 | }, |
240 | }; | |
8c68e84f | 241 | |
edc8c54b | 242 | static const struct ehci_driver_overrides msm_overrides __initconst = { |
8c68e84f MG |
243 | .reset = ehci_msm_reset, |
244 | }; | |
245 | ||
246 | static int __init ehci_msm_init(void) | |
247 | { | |
248 | if (usb_disabled()) | |
249 | return -ENODEV; | |
250 | ||
251 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
252 | ehci_init_driver(&msm_hc_driver, &msm_overrides); | |
253 | return platform_driver_register(&ehci_msm_driver); | |
254 | } | |
255 | module_init(ehci_msm_init); | |
256 | ||
257 | static void __exit ehci_msm_cleanup(void) | |
258 | { | |
259 | platform_driver_unregister(&ehci_msm_driver); | |
260 | } | |
261 | module_exit(ehci_msm_cleanup); | |
262 | ||
263 | MODULE_DESCRIPTION(DRIVER_DESC); | |
264 | MODULE_ALIAS("platform:msm-ehci"); | |
265 | MODULE_LICENSE("GPL"); |