dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / usb / host / ehci-omap.c
blob7d20296cbe9f9459d31742a29049c4c9c518b27e
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * ehci-omap.c - driver for USBHOST on OMAP3/4 processors
5 * Bus Glue for the EHCI controllers in OMAP3/4
6 * Tested on several OMAP3 boards, and OMAP4 Pandaboard
8 * Copyright (C) 2007-2013 Texas Instruments, Inc.
9 * Author: Vikram Pandita <vikram.pandita@ti.com>
10 * Author: Anand Gadiyar <gadiyar@ti.com>
11 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
12 * Author: Roger Quadros <rogerq@ti.com>
14 * Copyright (C) 2009 Nokia Corporation
15 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
17 * Based on "ehci-fsl.c" and "ehci-au1xxx.c" ehci glue layers
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/io.h>
23 #include <linux/platform_device.h>
24 #include <linux/slab.h>
25 #include <linux/usb/ulpi.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/gpio.h>
28 #include <linux/clk.h>
29 #include <linux/usb.h>
30 #include <linux/usb/hcd.h>
31 #include <linux/of.h>
32 #include <linux/dma-mapping.h>
34 #include "ehci.h"
36 #include <linux/platform_data/usb-omap.h>
38 /* EHCI Register Set */
39 #define EHCI_INSNREG04 (0xA0)
40 #define EHCI_INSNREG04_DISABLE_UNSUSPEND (1 << 5)
41 #define EHCI_INSNREG05_ULPI (0xA4)
42 #define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31
43 #define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24
44 #define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22
45 #define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16
46 #define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
47 #define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
49 #define DRIVER_DESC "OMAP-EHCI Host Controller driver"
51 static const char hcd_name[] = "ehci-omap";
53 /*-------------------------------------------------------------------------*/
55 struct omap_hcd {
56 struct usb_phy *phy[OMAP3_HS_USB_PORTS]; /* one PHY for each port */
57 int nports;
60 static inline void ehci_write(void __iomem *base, u32 reg, u32 val)
62 __raw_writel(val, base + reg);
65 static inline u32 ehci_read(void __iomem *base, u32 reg)
67 return __raw_readl(base + reg);
70 /* configure so an HC device and id are always provided */
71 /* always called with process context; sleeping is OK */
73 static struct hc_driver __read_mostly ehci_omap_hc_driver;
75 static const struct ehci_driver_overrides ehci_omap_overrides __initconst = {
76 .extra_priv_size = sizeof(struct omap_hcd),
79 /**
80 * ehci_hcd_omap_probe - initialize TI-based HCDs
82 * Allocates basic resources for this USB host controller, and
83 * then invokes the start() method for the HCD associated with it
84 * through the hotplug entry's driver_data.
86 static int ehci_hcd_omap_probe(struct platform_device *pdev)
88 struct device *dev = &pdev->dev;
89 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
90 struct resource *res;
91 struct usb_hcd *hcd;
92 void __iomem *regs;
93 int ret;
94 int irq;
95 int i;
96 struct omap_hcd *omap;
98 if (usb_disabled())
99 return -ENODEV;
101 if (!dev->parent) {
102 dev_err(dev, "Missing parent device\n");
103 return -ENODEV;
106 /* For DT boot, get platform data from parent. i.e. usbhshost */
107 if (dev->of_node) {
108 pdata = dev_get_platdata(dev->parent);
109 dev->platform_data = pdata;
112 if (!pdata) {
113 dev_err(dev, "Missing platform data\n");
114 return -ENODEV;
117 irq = platform_get_irq(pdev, 0);
118 if (irq < 0) {
119 dev_err(dev, "EHCI irq failed: %d\n", irq);
120 return irq;
123 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
124 regs = devm_ioremap_resource(dev, res);
125 if (IS_ERR(regs))
126 return PTR_ERR(regs);
129 * Right now device-tree probed devices don't get dma_mask set.
130 * Since shared usb code relies on it, set it here for now.
131 * Once we have dma capability bindings this can go away.
133 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
134 if (ret)
135 return ret;
137 ret = -ENODEV;
138 hcd = usb_create_hcd(&ehci_omap_hc_driver, dev,
139 dev_name(dev));
140 if (!hcd) {
141 dev_err(dev, "Failed to create HCD\n");
142 return -ENOMEM;
145 hcd->rsrc_start = res->start;
146 hcd->rsrc_len = resource_size(res);
147 hcd->regs = regs;
148 hcd_to_ehci(hcd)->caps = regs;
150 omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;
151 omap->nports = pdata->nports;
153 platform_set_drvdata(pdev, hcd);
155 /* get the PHY devices if needed */
156 for (i = 0 ; i < omap->nports ; i++) {
157 struct usb_phy *phy;
159 /* get the PHY device */
160 phy = devm_usb_get_phy_by_phandle(dev, "phys", i);
161 if (IS_ERR(phy)) {
162 ret = PTR_ERR(phy);
163 if (ret == -ENODEV) { /* no PHY */
164 phy = NULL;
165 continue;
168 if (ret != -EPROBE_DEFER)
169 dev_err(dev, "Can't get PHY for port %d: %d\n",
170 i, ret);
171 goto err_phy;
174 omap->phy[i] = phy;
176 if (pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY) {
177 usb_phy_init(omap->phy[i]);
178 /* bring PHY out of suspend */
179 usb_phy_set_suspend(omap->phy[i], 0);
183 pm_runtime_enable(dev);
184 pm_runtime_get_sync(dev);
187 * An undocumented "feature" in the OMAP3 EHCI controller,
188 * causes suspended ports to be taken out of suspend when
189 * the USBCMD.Run/Stop bit is cleared (for example when
190 * we do ehci_bus_suspend).
191 * This breaks suspend-resume if the root-hub is allowed
192 * to suspend. Writing 1 to this undocumented register bit
193 * disables this feature and restores normal behavior.
195 ehci_write(regs, EHCI_INSNREG04,
196 EHCI_INSNREG04_DISABLE_UNSUSPEND);
198 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
199 if (ret) {
200 dev_err(dev, "failed to add hcd with err %d\n", ret);
201 goto err_pm_runtime;
203 device_wakeup_enable(hcd->self.controller);
206 * Bring PHYs out of reset for non PHY modes.
207 * Even though HSIC mode is a PHY-less mode, the reset
208 * line exists between the chips and can be modelled
209 * as a PHY device for reset control.
211 for (i = 0; i < omap->nports; i++) {
212 if (!omap->phy[i] ||
213 pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY)
214 continue;
216 usb_phy_init(omap->phy[i]);
217 /* bring PHY out of suspend */
218 usb_phy_set_suspend(omap->phy[i], 0);
221 return 0;
223 err_pm_runtime:
224 pm_runtime_put_sync(dev);
226 err_phy:
227 for (i = 0; i < omap->nports; i++) {
228 if (omap->phy[i])
229 usb_phy_shutdown(omap->phy[i]);
232 usb_put_hcd(hcd);
234 return ret;
239 * ehci_hcd_omap_remove - shutdown processing for EHCI HCDs
240 * @pdev: USB Host Controller being removed
242 * Reverses the effect of usb_ehci_hcd_omap_probe(), first invoking
243 * the HCD's stop() method. It is always called from a thread
244 * context, normally "rmmod", "apmd", or something similar.
246 static int ehci_hcd_omap_remove(struct platform_device *pdev)
248 struct device *dev = &pdev->dev;
249 struct usb_hcd *hcd = dev_get_drvdata(dev);
250 struct omap_hcd *omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;
251 int i;
253 usb_remove_hcd(hcd);
255 for (i = 0; i < omap->nports; i++) {
256 if (omap->phy[i])
257 usb_phy_shutdown(omap->phy[i]);
260 usb_put_hcd(hcd);
261 pm_runtime_put_sync(dev);
262 pm_runtime_disable(dev);
264 return 0;
267 static const struct of_device_id omap_ehci_dt_ids[] = {
268 { .compatible = "ti,ehci-omap" },
272 MODULE_DEVICE_TABLE(of, omap_ehci_dt_ids);
274 static struct platform_driver ehci_hcd_omap_driver = {
275 .probe = ehci_hcd_omap_probe,
276 .remove = ehci_hcd_omap_remove,
277 .shutdown = usb_hcd_platform_shutdown,
278 /*.suspend = ehci_hcd_omap_suspend, */
279 /*.resume = ehci_hcd_omap_resume, */
280 .driver = {
281 .name = hcd_name,
282 .of_match_table = omap_ehci_dt_ids,
286 /*-------------------------------------------------------------------------*/
288 static int __init ehci_omap_init(void)
290 if (usb_disabled())
291 return -ENODEV;
293 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
295 ehci_init_driver(&ehci_omap_hc_driver, &ehci_omap_overrides);
296 return platform_driver_register(&ehci_hcd_omap_driver);
298 module_init(ehci_omap_init);
300 static void __exit ehci_omap_cleanup(void)
302 platform_driver_unregister(&ehci_hcd_omap_driver);
304 module_exit(ehci_omap_cleanup);
306 MODULE_ALIAS("platform:ehci-omap");
307 MODULE_AUTHOR("Texas Instruments, Inc.");
308 MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
309 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
311 MODULE_DESCRIPTION(DRIVER_DESC);
312 MODULE_LICENSE("GPL");