net: DCB: Validate DCB_ATTR_DCB_BUFFER argument
[linux/fpc-iii.git] / drivers / usb / host / ohci-platform.c
blob7addfc2cbadce08d4d92ed858d4f226b0e3e676f
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Generic platform ohci driver
5 * Copyright 2007 Michael Buesch <m@bues.ch>
6 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
7 * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
9 * Derived from the OCHI-SSB driver
10 * Derived from the OHCI-PCI driver
11 * Copyright 1999 Roman Weissgaerber
12 * Copyright 2000-2002 David Brownell
13 * Copyright 1999 Linus Torvalds
14 * Copyright 1999 Gregory P. Smith
17 #include <linux/clk.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/hrtimer.h>
20 #include <linux/io.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/err.h>
24 #include <linux/of.h>
25 #include <linux/platform_device.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/reset.h>
28 #include <linux/usb/ohci_pdriver.h>
29 #include <linux/usb.h>
30 #include <linux/usb/hcd.h>
32 #include "ohci.h"
34 #define DRIVER_DESC "OHCI generic platform driver"
35 #define OHCI_MAX_CLKS 3
36 #define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
38 struct ohci_platform_priv {
39 struct clk *clks[OHCI_MAX_CLKS];
40 struct reset_control *resets;
43 static const char hcd_name[] = "ohci-platform";
45 static int ohci_platform_power_on(struct platform_device *dev)
47 struct usb_hcd *hcd = platform_get_drvdata(dev);
48 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
49 int clk, ret;
51 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
52 ret = clk_prepare_enable(priv->clks[clk]);
53 if (ret)
54 goto err_disable_clks;
57 return 0;
59 err_disable_clks:
60 while (--clk >= 0)
61 clk_disable_unprepare(priv->clks[clk]);
63 return ret;
66 static void ohci_platform_power_off(struct platform_device *dev)
68 struct usb_hcd *hcd = platform_get_drvdata(dev);
69 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
70 int clk;
72 for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
73 if (priv->clks[clk])
74 clk_disable_unprepare(priv->clks[clk]);
77 static struct hc_driver __read_mostly ohci_platform_hc_driver;
79 static const struct ohci_driver_overrides platform_overrides __initconst = {
80 .product_desc = "Generic Platform OHCI controller",
81 .extra_priv_size = sizeof(struct ohci_platform_priv),
84 static struct usb_ohci_pdata ohci_platform_defaults = {
85 .power_on = ohci_platform_power_on,
86 .power_suspend = ohci_platform_power_off,
87 .power_off = ohci_platform_power_off,
90 static int ohci_platform_probe(struct platform_device *dev)
92 struct usb_hcd *hcd;
93 struct resource *res_mem;
94 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
95 struct ohci_platform_priv *priv;
96 struct ohci_hcd *ohci;
97 int err, irq, clk = 0;
99 if (usb_disabled())
100 return -ENODEV;
103 * Use reasonable defaults so platforms don't have to provide these
104 * with DT probing on ARM.
106 if (!pdata)
107 pdata = &ohci_platform_defaults;
109 err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
110 if (err)
111 return err;
113 irq = platform_get_irq(dev, 0);
114 if (irq < 0)
115 return irq;
117 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
118 dev_name(&dev->dev));
119 if (!hcd)
120 return -ENOMEM;
122 platform_set_drvdata(dev, hcd);
123 dev->dev.platform_data = pdata;
124 priv = hcd_to_ohci_priv(hcd);
125 ohci = hcd_to_ohci(hcd);
127 if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
128 if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
129 ohci->flags |= OHCI_QUIRK_BE_MMIO;
131 if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
132 ohci->flags |= OHCI_QUIRK_BE_DESC;
134 if (of_property_read_bool(dev->dev.of_node, "big-endian"))
135 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
137 if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
138 ohci->flags |= OHCI_QUIRK_FRAME_NO;
140 if (of_property_read_bool(dev->dev.of_node,
141 "remote-wakeup-connected"))
142 ohci->hc_control = OHCI_CTRL_RWC;
144 of_property_read_u32(dev->dev.of_node, "num-ports",
145 &ohci->num_ports);
147 for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
148 priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
149 if (IS_ERR(priv->clks[clk])) {
150 err = PTR_ERR(priv->clks[clk]);
151 if (err == -EPROBE_DEFER)
152 goto err_put_clks;
153 priv->clks[clk] = NULL;
154 break;
158 priv->resets = devm_reset_control_array_get_optional_shared(
159 &dev->dev);
160 if (IS_ERR(priv->resets)) {
161 err = PTR_ERR(priv->resets);
162 goto err_put_clks;
165 err = reset_control_deassert(priv->resets);
166 if (err)
167 goto err_put_clks;
170 if (pdata->big_endian_desc)
171 ohci->flags |= OHCI_QUIRK_BE_DESC;
172 if (pdata->big_endian_mmio)
173 ohci->flags |= OHCI_QUIRK_BE_MMIO;
174 if (pdata->no_big_frame_no)
175 ohci->flags |= OHCI_QUIRK_FRAME_NO;
176 if (pdata->num_ports)
177 ohci->num_ports = pdata->num_ports;
179 #ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
180 if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
181 dev_err(&dev->dev,
182 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
183 err = -EINVAL;
184 goto err_reset;
186 #endif
187 #ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
188 if (ohci->flags & OHCI_QUIRK_BE_DESC) {
189 dev_err(&dev->dev,
190 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
191 err = -EINVAL;
192 goto err_reset;
194 #endif
196 pm_runtime_set_active(&dev->dev);
197 pm_runtime_enable(&dev->dev);
198 if (pdata->power_on) {
199 err = pdata->power_on(dev);
200 if (err < 0)
201 goto err_reset;
204 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
205 hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
206 if (IS_ERR(hcd->regs)) {
207 err = PTR_ERR(hcd->regs);
208 goto err_power;
210 hcd->rsrc_start = res_mem->start;
211 hcd->rsrc_len = resource_size(res_mem);
213 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
214 if (err)
215 goto err_power;
217 device_wakeup_enable(hcd->self.controller);
219 platform_set_drvdata(dev, hcd);
221 return err;
223 err_power:
224 if (pdata->power_off)
225 pdata->power_off(dev);
226 err_reset:
227 pm_runtime_disable(&dev->dev);
228 reset_control_assert(priv->resets);
229 err_put_clks:
230 while (--clk >= 0)
231 clk_put(priv->clks[clk]);
233 if (pdata == &ohci_platform_defaults)
234 dev->dev.platform_data = NULL;
236 usb_put_hcd(hcd);
238 return err;
241 static int ohci_platform_remove(struct platform_device *dev)
243 struct usb_hcd *hcd = platform_get_drvdata(dev);
244 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
245 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
246 int clk;
248 pm_runtime_get_sync(&dev->dev);
249 usb_remove_hcd(hcd);
251 if (pdata->power_off)
252 pdata->power_off(dev);
254 reset_control_assert(priv->resets);
256 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
257 clk_put(priv->clks[clk]);
259 usb_put_hcd(hcd);
261 pm_runtime_put_sync(&dev->dev);
262 pm_runtime_disable(&dev->dev);
264 if (pdata == &ohci_platform_defaults)
265 dev->dev.platform_data = NULL;
267 return 0;
270 #ifdef CONFIG_PM_SLEEP
271 static int ohci_platform_suspend(struct device *dev)
273 struct usb_hcd *hcd = dev_get_drvdata(dev);
274 struct usb_ohci_pdata *pdata = dev->platform_data;
275 struct platform_device *pdev = to_platform_device(dev);
276 bool do_wakeup = device_may_wakeup(dev);
277 int ret;
279 ret = ohci_suspend(hcd, do_wakeup);
280 if (ret)
281 return ret;
283 if (pdata->power_suspend)
284 pdata->power_suspend(pdev);
286 return ret;
289 static int ohci_platform_resume(struct device *dev)
291 struct usb_hcd *hcd = dev_get_drvdata(dev);
292 struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
293 struct platform_device *pdev = to_platform_device(dev);
295 if (pdata->power_on) {
296 int err = pdata->power_on(pdev);
297 if (err < 0)
298 return err;
301 ohci_resume(hcd, false);
302 return 0;
304 #endif /* CONFIG_PM_SLEEP */
306 static const struct of_device_id ohci_platform_ids[] = {
307 { .compatible = "generic-ohci", },
308 { .compatible = "cavium,octeon-6335-ohci", },
309 { .compatible = "ti,ohci-omap3", },
312 MODULE_DEVICE_TABLE(of, ohci_platform_ids);
314 static const struct platform_device_id ohci_platform_table[] = {
315 { "ohci-platform", 0 },
318 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
320 static SIMPLE_DEV_PM_OPS(ohci_platform_pm_ops, ohci_platform_suspend,
321 ohci_platform_resume);
323 static struct platform_driver ohci_platform_driver = {
324 .id_table = ohci_platform_table,
325 .probe = ohci_platform_probe,
326 .remove = ohci_platform_remove,
327 .shutdown = usb_hcd_platform_shutdown,
328 .driver = {
329 .name = "ohci-platform",
330 .pm = &ohci_platform_pm_ops,
331 .of_match_table = ohci_platform_ids,
335 static int __init ohci_platform_init(void)
337 if (usb_disabled())
338 return -ENODEV;
340 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
342 ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
343 return platform_driver_register(&ohci_platform_driver);
345 module_init(ohci_platform_init);
347 static void __exit ohci_platform_cleanup(void)
349 platform_driver_unregister(&ohci_platform_driver);
351 module_exit(ohci_platform_cleanup);
353 MODULE_DESCRIPTION(DRIVER_DESC);
354 MODULE_AUTHOR("Hauke Mehrtens");
355 MODULE_AUTHOR("Alan Stern");
356 MODULE_LICENSE("GPL");