2 * Copyright (C) 2005-2007 by Texas Instruments
3 * Some code has been taken from tusb6010.c
4 * Copyrights for that are attributable to:
5 * Copyright (C) 2006 Nokia Corporation
6 * Tony Lindgren <tony@atomide.com>
8 * This file is part of the Inventra Controller Driver for Linux.
10 * The Inventra Controller Driver for Linux is free software; you
11 * can redistribute it and/or modify it under the terms of the GNU
12 * General Public License version 2 as published by the Free Software
15 * The Inventra Controller Driver for Linux is distributed in
16 * the hope that it will be useful, but WITHOUT ANY WARRANTY;
17 * without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 * License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with The Inventra Controller Driver for Linux ; if not,
23 * write to the Free Software Foundation, Inc., 59 Temple Place,
24 * Suite 330, Boston, MA 02111-1307 USA
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
33 #include <linux/platform_device.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/pm_runtime.h>
36 #include <linux/err.h>
38 #include "musb_core.h"
41 struct omap2430_glue {
43 struct platform_device *musb;
45 #define glue_to_musb(g) platform_get_drvdata(g->musb)
47 static struct timer_list musb_idle_timer;
49 static void musb_do_idle(unsigned long _musb)
51 struct musb *musb = (void *)_musb;
56 spin_lock_irqsave(&musb->lock, flags);
58 switch (musb->xceiv->state) {
59 case OTG_STATE_A_WAIT_BCON:
61 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
62 if (devctl & MUSB_DEVCTL_BDEVICE) {
63 musb->xceiv->state = OTG_STATE_B_IDLE;
66 musb->xceiv->state = OTG_STATE_A_IDLE;
70 case OTG_STATE_A_SUSPEND:
71 /* finish RESUME signaling? */
72 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
73 power = musb_readb(musb->mregs, MUSB_POWER);
74 power &= ~MUSB_POWER_RESUME;
75 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
76 musb_writeb(musb->mregs, MUSB_POWER, power);
78 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
79 | MUSB_PORT_STAT_RESUME);
80 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
81 usb_hcd_poll_rh_status(musb_to_hcd(musb));
82 /* NOTE: it might really be A_WAIT_BCON ... */
83 musb->xceiv->state = OTG_STATE_A_HOST;
86 case OTG_STATE_A_HOST:
87 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
88 if (devctl & MUSB_DEVCTL_BDEVICE)
89 musb->xceiv->state = OTG_STATE_B_IDLE;
91 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
95 spin_unlock_irqrestore(&musb->lock, flags);
99 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
101 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
102 static unsigned long last_timer;
105 timeout = default_timeout;
107 /* Never idle if active, or when VBUS timeout is not set as host */
108 if (musb->is_active || ((musb->a_wait_bcon == 0)
109 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
110 dev_dbg(musb->controller, "%s active, deleting timer\n",
111 otg_state_string(musb->xceiv->state));
112 del_timer(&musb_idle_timer);
113 last_timer = jiffies;
117 if (time_after(last_timer, timeout)) {
118 if (!timer_pending(&musb_idle_timer))
119 last_timer = timeout;
121 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
125 last_timer = timeout;
127 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
128 otg_state_string(musb->xceiv->state),
129 (unsigned long)jiffies_to_msecs(timeout - jiffies));
130 mod_timer(&musb_idle_timer, timeout);
133 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
136 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
138 /* HDRC controls CPEN, but beware current surges during device
139 * connect. They can trigger transient overcurrent conditions
140 * that must be ignored.
143 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
146 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
147 /* start the session */
148 devctl |= MUSB_DEVCTL_SESSION;
149 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
151 * Wait for the musb to set as A device to enable the
154 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
158 if (time_after(jiffies, timeout)) {
159 dev_err(musb->controller,
160 "configured as A device timeout");
166 if (ret && musb->xceiv->set_vbus)
167 otg_set_vbus(musb->xceiv, 1);
170 musb->xceiv->default_a = 1;
171 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
172 devctl |= MUSB_DEVCTL_SESSION;
178 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
179 * jumping right to B_IDLE...
182 musb->xceiv->default_a = 0;
183 musb->xceiv->state = OTG_STATE_B_IDLE;
184 devctl &= ~MUSB_DEVCTL_SESSION;
188 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
190 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
191 /* otg %3x conf %08x prcm %08x */ "\n",
192 otg_state_string(musb->xceiv->state),
193 musb_readb(musb->mregs, MUSB_DEVCTL));
196 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
198 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
200 devctl |= MUSB_DEVCTL_SESSION;
201 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
206 static inline void omap2430_low_level_exit(struct musb *musb)
211 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
212 l |= ENABLEFORCE; /* enable MSTANDBY */
213 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
216 static inline void omap2430_low_level_init(struct musb *musb)
220 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
221 l &= ~ENABLEFORCE; /* disable MSTANDBY */
222 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
225 static int musb_otg_notifications(struct notifier_block *nb,
226 unsigned long event, void *unused)
228 struct musb *musb = container_of(nb, struct musb, nb);
230 musb->xceiv_event = event;
231 schedule_work(&musb->otg_notifier_work);
236 static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
238 struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work);
239 struct device *dev = musb->controller;
240 struct musb_hdrc_platform_data *pdata = dev->platform_data;
241 struct omap_musb_board_data *data = pdata->board_data;
243 switch (musb->xceiv_event) {
245 dev_dbg(musb->controller, "ID GND\n");
247 if (!is_otg_enabled(musb) || musb->gadget_driver) {
248 pm_runtime_get_sync(musb->controller);
249 otg_init(musb->xceiv);
250 omap2430_musb_set_vbus(musb, 1);
255 dev_dbg(musb->controller, "VBUS Connect\n");
257 if (musb->gadget_driver)
258 pm_runtime_get_sync(musb->controller);
259 otg_init(musb->xceiv);
263 dev_dbg(musb->controller, "VBUS Disconnect\n");
265 if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
266 if (musb->gadget_driver) {
267 pm_runtime_mark_last_busy(musb->controller);
268 pm_runtime_put_autosuspend(musb->controller);
271 if (data->interface_type == MUSB_INTERFACE_UTMI) {
272 if (musb->xceiv->set_vbus)
273 otg_set_vbus(musb->xceiv, 0);
275 otg_shutdown(musb->xceiv);
278 dev_dbg(musb->controller, "ID float\n");
282 static int omap2430_musb_init(struct musb *musb)
285 struct device *dev = musb->controller;
286 struct musb_hdrc_platform_data *plat = dev->platform_data;
287 struct omap_musb_board_data *data = plat->board_data;
289 /* We require some kind of external transceiver, hooked
290 * up through ULPI. TWL4030-family PMICs include one,
291 * which needs a driver, drivers aren't always needed.
293 musb->xceiv = otg_get_transceiver();
295 pr_err("HS USB OTG: no transceiver configured\n");
299 INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);
301 status = pm_runtime_get_sync(dev);
303 dev_err(dev, "pm_runtime_get_sync FAILED");
307 l = musb_readl(musb->mregs, OTG_INTERFSEL);
309 if (data->interface_type == MUSB_INTERFACE_UTMI) {
310 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
311 l &= ~ULPI_12PIN; /* Disable ULPI */
312 l |= UTMI_8BIT; /* Enable UTMI */
317 musb_writel(musb->mregs, OTG_INTERFSEL, l);
319 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
320 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
321 musb_readl(musb->mregs, OTG_REVISION),
322 musb_readl(musb->mregs, OTG_SYSCONFIG),
323 musb_readl(musb->mregs, OTG_SYSSTATUS),
324 musb_readl(musb->mregs, OTG_INTERFSEL),
325 musb_readl(musb->mregs, OTG_SIMENABLE));
327 musb->nb.notifier_call = musb_otg_notifications;
328 status = otg_register_notifier(musb->xceiv, &musb->nb);
331 dev_dbg(musb->controller, "notification register failed\n");
333 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
341 static void omap2430_musb_enable(struct musb *musb)
344 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
345 struct device *dev = musb->controller;
346 struct musb_hdrc_platform_data *pdata = dev->platform_data;
347 struct omap_musb_board_data *data = pdata->board_data;
349 switch (musb->xceiv->last_event) {
352 otg_init(musb->xceiv);
353 if (data->interface_type != MUSB_INTERFACE_UTMI)
355 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
356 /* start the session */
357 devctl |= MUSB_DEVCTL_SESSION;
358 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
359 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
360 MUSB_DEVCTL_BDEVICE) {
363 if (time_after(jiffies, timeout)) {
364 dev_err(dev, "configured as A device timeout");
371 otg_init(musb->xceiv);
379 static void omap2430_musb_disable(struct musb *musb)
381 if (musb->xceiv->last_event)
382 otg_shutdown(musb->xceiv);
385 static int omap2430_musb_exit(struct musb *musb)
387 del_timer_sync(&musb_idle_timer);
388 cancel_work_sync(&musb->otg_notifier_work);
390 omap2430_low_level_exit(musb);
391 otg_put_transceiver(musb->xceiv);
396 static const struct musb_platform_ops omap2430_ops = {
397 .init = omap2430_musb_init,
398 .exit = omap2430_musb_exit,
400 .set_mode = omap2430_musb_set_mode,
401 .try_idle = omap2430_musb_try_idle,
403 .set_vbus = omap2430_musb_set_vbus,
405 .enable = omap2430_musb_enable,
406 .disable = omap2430_musb_disable,
409 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
411 static int __init omap2430_probe(struct platform_device *pdev)
413 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
414 struct platform_device *musb;
415 struct omap2430_glue *glue;
418 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
420 dev_err(&pdev->dev, "failed to allocate glue context\n");
424 musb = platform_device_alloc("musb-hdrc", -1);
426 dev_err(&pdev->dev, "failed to allocate musb device\n");
430 musb->dev.parent = &pdev->dev;
431 musb->dev.dma_mask = &omap2430_dmamask;
432 musb->dev.coherent_dma_mask = omap2430_dmamask;
434 glue->dev = &pdev->dev;
437 pdata->platform_ops = &omap2430_ops;
439 platform_set_drvdata(pdev, glue);
441 ret = platform_device_add_resources(musb, pdev->resource,
442 pdev->num_resources);
444 dev_err(&pdev->dev, "failed to add resources\n");
448 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
450 dev_err(&pdev->dev, "failed to add platform_data\n");
454 ret = platform_device_add(musb);
456 dev_err(&pdev->dev, "failed to register musb device\n");
460 pm_runtime_enable(&pdev->dev);
465 platform_device_put(musb);
474 static int __exit omap2430_remove(struct platform_device *pdev)
476 struct omap2430_glue *glue = platform_get_drvdata(pdev);
478 platform_device_del(glue->musb);
479 platform_device_put(glue->musb);
480 pm_runtime_put(&pdev->dev);
488 static int omap2430_runtime_suspend(struct device *dev)
490 struct omap2430_glue *glue = dev_get_drvdata(dev);
491 struct musb *musb = glue_to_musb(glue);
493 musb->context.otg_interfsel = musb_readl(musb->mregs,
496 omap2430_low_level_exit(musb);
497 otg_set_suspend(musb->xceiv, 1);
502 static int omap2430_runtime_resume(struct device *dev)
504 struct omap2430_glue *glue = dev_get_drvdata(dev);
505 struct musb *musb = glue_to_musb(glue);
507 omap2430_low_level_init(musb);
508 musb_writel(musb->mregs, OTG_INTERFSEL,
509 musb->context.otg_interfsel);
511 otg_set_suspend(musb->xceiv, 0);
516 static struct dev_pm_ops omap2430_pm_ops = {
517 .runtime_suspend = omap2430_runtime_suspend,
518 .runtime_resume = omap2430_runtime_resume,
521 #define DEV_PM_OPS (&omap2430_pm_ops)
523 #define DEV_PM_OPS NULL
526 static struct platform_driver omap2430_driver = {
527 .remove = __exit_p(omap2430_remove),
529 .name = "musb-omap2430",
534 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
535 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
536 MODULE_LICENSE("GPL v2");
538 static int __init omap2430_init(void)
540 return platform_driver_probe(&omap2430_driver, omap2430_probe);
542 subsys_initcall(omap2430_init);
544 static void __exit omap2430_exit(void)
546 platform_driver_unregister(&omap2430_driver);
548 module_exit(omap2430_exit);