Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
7e8d5cd9 DM |
2 | /* |
3 | * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix | |
4 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
7e8d5cd9 DM |
5 | */ |
6 | ||
dba63b2f AS |
7 | #include <linux/kernel.h> |
8 | #include <linux/module.h> | |
9 | #include <linux/io.h> | |
7e8d5cd9 DM |
10 | #include <linux/platform_device.h> |
11 | #include <linux/clk.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/usb/otg.h> | |
a464dc4d | 14 | #include <linux/usb/ulpi.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
dba63b2f AS |
16 | #include <linux/usb.h> |
17 | #include <linux/usb/hcd.h> | |
82906b13 | 18 | #include <linux/platform_data/usb-ehci-mxc.h> |
dba63b2f AS |
19 | #include "ehci.h" |
20 | ||
21 | #define DRIVER_DESC "Freescale On-Chip EHCI Host driver" | |
22 | ||
23 | static const char hcd_name[] = "ehci-mxc"; | |
24 | ||
7e8d5cd9 | 25 | #define ULPI_VIEWPORT_OFFSET 0x170 |
7e8d5cd9 DM |
26 | |
27 | struct ehci_mxc_priv { | |
c943740c | 28 | struct clk *usbclk, *ahbclk, *phyclk; |
7e8d5cd9 DM |
29 | }; |
30 | ||
dba63b2f | 31 | static struct hc_driver __read_mostly ehci_mxc_hc_driver; |
7e8d5cd9 | 32 | |
62d08a11 | 33 | static const struct ehci_driver_overrides ehci_mxc_overrides __initconst = { |
dba63b2f | 34 | .extra_priv_size = sizeof(struct ehci_mxc_priv), |
7e8d5cd9 DM |
35 | }; |
36 | ||
37 | static int ehci_mxc_drv_probe(struct platform_device *pdev) | |
38 | { | |
d4f09e28 | 39 | struct mxc_usbh_platform_data *pdata = dev_get_platdata(&pdev->dev); |
7e8d5cd9 DM |
40 | struct usb_hcd *hcd; |
41 | struct resource *res; | |
724c8525 | 42 | int irq, ret; |
7e8d5cd9 DM |
43 | struct ehci_mxc_priv *priv; |
44 | struct device *dev = &pdev->dev; | |
0247a7bc | 45 | struct ehci_hcd *ehci; |
7e8d5cd9 | 46 | |
7e8d5cd9 DM |
47 | if (!pdata) { |
48 | dev_err(dev, "No platform data given, bailing out.\n"); | |
49 | return -EINVAL; | |
50 | } | |
51 | ||
52 | irq = platform_get_irq(pdev, 0); | |
53 | ||
54 | hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev)); | |
55 | if (!hcd) | |
56 | return -ENOMEM; | |
57 | ||
7e8d5cd9 | 58 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
148e1134 TR |
59 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
60 | if (IS_ERR(hcd->regs)) { | |
61 | ret = PTR_ERR(hcd->regs); | |
af09c060 | 62 | goto err_alloc; |
7e8d5cd9 | 63 | } |
d6e269ae VB |
64 | hcd->rsrc_start = res->start; |
65 | hcd->rsrc_len = resource_size(res); | |
7e8d5cd9 | 66 | |
dba63b2f AS |
67 | hcd->has_tt = 1; |
68 | ehci = hcd_to_ehci(hcd); | |
69 | priv = (struct ehci_mxc_priv *) ehci->priv; | |
70 | ||
7e8d5cd9 | 71 | /* enable clocks */ |
af09c060 | 72 | priv->usbclk = devm_clk_get(&pdev->dev, "ipg"); |
7e8d5cd9 DM |
73 | if (IS_ERR(priv->usbclk)) { |
74 | ret = PTR_ERR(priv->usbclk); | |
af09c060 | 75 | goto err_alloc; |
7e8d5cd9 | 76 | } |
198ad2ce | 77 | clk_prepare_enable(priv->usbclk); |
7e8d5cd9 | 78 | |
af09c060 | 79 | priv->ahbclk = devm_clk_get(&pdev->dev, "ahb"); |
c943740c SH |
80 | if (IS_ERR(priv->ahbclk)) { |
81 | ret = PTR_ERR(priv->ahbclk); | |
82 | goto err_clk_ahb; | |
7e8d5cd9 | 83 | } |
c943740c | 84 | clk_prepare_enable(priv->ahbclk); |
7e8d5cd9 | 85 | |
3bb8029a | 86 | /* "dr" device has its own clock on i.MX51 */ |
af09c060 | 87 | priv->phyclk = devm_clk_get(&pdev->dev, "phy"); |
c943740c SH |
88 | if (IS_ERR(priv->phyclk)) |
89 | priv->phyclk = NULL; | |
90 | if (priv->phyclk) | |
91 | clk_prepare_enable(priv->phyclk); | |
711669e5 APR |
92 | |
93 | ||
94 | /* call platform specific init function */ | |
95 | if (pdata->init) { | |
96 | ret = pdata->init(pdev); | |
97 | if (ret) { | |
98 | dev_err(dev, "platform init failed\n"); | |
99 | goto err_init; | |
100 | } | |
101 | /* platforms need some time to settle changed IO settings */ | |
102 | mdelay(10); | |
103 | } | |
104 | ||
0247a7bc FE |
105 | /* EHCI registers start at offset 0x100 */ |
106 | ehci->caps = hcd->regs + 0x100; | |
107 | ehci->regs = hcd->regs + 0x100 + | |
c430131a | 108 | HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
0247a7bc FE |
109 | |
110 | /* set up the PORTSCx register */ | |
111 | ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]); | |
112 | ||
113 | /* is this really needed? */ | |
114 | msleep(10); | |
115 | ||
7e8d5cd9 DM |
116 | /* Initialize the transceiver */ |
117 | if (pdata->otg) { | |
118 | pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET; | |
b96d3b08 | 119 | ret = usb_phy_init(pdata->otg); |
4c9715de WS |
120 | if (ret) { |
121 | dev_err(dev, "unable to init transceiver, probably missing\n"); | |
122 | ret = -ENODEV; | |
123 | goto err_add; | |
124 | } | |
6e13c650 | 125 | ret = otg_set_vbus(pdata->otg->otg, 1); |
4c9715de | 126 | if (ret) { |
7e8d5cd9 | 127 | dev_err(dev, "unable to enable vbus on transceiver\n"); |
4c9715de WS |
128 | goto err_add; |
129 | } | |
7e8d5cd9 DM |
130 | } |
131 | ||
dba63b2f | 132 | platform_set_drvdata(pdev, hcd); |
7e8d5cd9 | 133 | |
b5dd18d8 | 134 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
7e8d5cd9 DM |
135 | if (ret) |
136 | goto err_add; | |
137 | ||
3c9740a1 | 138 | device_wakeup_enable(hcd->self.controller); |
7e8d5cd9 DM |
139 | return 0; |
140 | ||
141 | err_add: | |
142 | if (pdata && pdata->exit) | |
143 | pdata->exit(pdev); | |
144 | err_init: | |
af09c060 | 145 | if (priv->phyclk) |
c943740c | 146 | clk_disable_unprepare(priv->phyclk); |
c943740c SH |
147 | |
148 | clk_disable_unprepare(priv->ahbclk); | |
7e8d5cd9 | 149 | err_clk_ahb: |
198ad2ce | 150 | clk_disable_unprepare(priv->usbclk); |
7e8d5cd9 DM |
151 | err_alloc: |
152 | usb_put_hcd(hcd); | |
153 | return ret; | |
154 | } | |
155 | ||
39d35681 | 156 | static int ehci_mxc_drv_remove(struct platform_device *pdev) |
7e8d5cd9 | 157 | { |
d4f09e28 | 158 | struct mxc_usbh_platform_data *pdata = dev_get_platdata(&pdev->dev); |
dba63b2f AS |
159 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
160 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
161 | struct ehci_mxc_priv *priv = (struct ehci_mxc_priv *) ehci->priv; | |
162 | ||
163 | usb_remove_hcd(hcd); | |
7e8d5cd9 DM |
164 | |
165 | if (pdata && pdata->exit) | |
166 | pdata->exit(pdev); | |
167 | ||
f375fc52 | 168 | if (pdata && pdata->otg) |
b96d3b08 | 169 | usb_phy_shutdown(pdata->otg); |
7e8d5cd9 | 170 | |
198ad2ce | 171 | clk_disable_unprepare(priv->usbclk); |
c943740c | 172 | clk_disable_unprepare(priv->ahbclk); |
c943740c | 173 | |
af09c060 | 174 | if (priv->phyclk) |
c943740c | 175 | clk_disable_unprepare(priv->phyclk); |
7e8d5cd9 | 176 | |
dba63b2f | 177 | usb_put_hcd(hcd); |
7e8d5cd9 DM |
178 | return 0; |
179 | } | |
180 | ||
7e8d5cd9 DM |
181 | MODULE_ALIAS("platform:mxc-ehci"); |
182 | ||
183 | static struct platform_driver ehci_mxc_driver = { | |
184 | .probe = ehci_mxc_drv_probe, | |
dba63b2f | 185 | .remove = ehci_mxc_drv_remove, |
aaf6b52d | 186 | .shutdown = usb_hcd_platform_shutdown, |
7e8d5cd9 DM |
187 | .driver = { |
188 | .name = "mxc-ehci", | |
189 | }, | |
190 | }; | |
dba63b2f AS |
191 | |
192 | static int __init ehci_mxc_init(void) | |
193 | { | |
194 | if (usb_disabled()) | |
195 | return -ENODEV; | |
196 | ||
197 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
198 | ||
199 | ehci_init_driver(&ehci_mxc_hc_driver, &ehci_mxc_overrides); | |
200 | return platform_driver_register(&ehci_mxc_driver); | |
201 | } | |
202 | module_init(ehci_mxc_init); | |
203 | ||
204 | static void __exit ehci_mxc_cleanup(void) | |
205 | { | |
206 | platform_driver_unregister(&ehci_mxc_driver); | |
207 | } | |
208 | module_exit(ehci_mxc_cleanup); | |
209 | ||
210 | MODULE_DESCRIPTION(DRIVER_DESC); | |
211 | MODULE_AUTHOR("Sascha Hauer"); | |
212 | MODULE_LICENSE("GPL"); |