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>
32 #include <linux/clk.h>
34 #include <linux/platform_device.h>
35 #include <linux/dma-mapping.h>
37 #include "musb_core.h"
40 struct omap2430_glue {
42 struct platform_device *musb;
46 static struct timer_list musb_idle_timer;
48 static void musb_do_idle(unsigned long _musb)
50 struct musb *musb = (void *)_musb;
52 #ifdef CONFIG_USB_MUSB_HDRC_HCD
57 spin_lock_irqsave(&musb->lock, flags);
59 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
61 switch (musb->xceiv->state) {
62 case OTG_STATE_A_WAIT_BCON:
63 devctl &= ~MUSB_DEVCTL_SESSION;
64 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
66 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
67 if (devctl & MUSB_DEVCTL_BDEVICE) {
68 musb->xceiv->state = OTG_STATE_B_IDLE;
71 musb->xceiv->state = OTG_STATE_A_IDLE;
75 #ifdef CONFIG_USB_MUSB_HDRC_HCD
76 case OTG_STATE_A_SUSPEND:
77 /* finish RESUME signaling? */
78 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
79 power = musb_readb(musb->mregs, MUSB_POWER);
80 power &= ~MUSB_POWER_RESUME;
81 DBG(1, "root port resume stopped, power %02x\n", power);
82 musb_writeb(musb->mregs, MUSB_POWER, power);
84 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
85 | MUSB_PORT_STAT_RESUME);
86 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
87 usb_hcd_poll_rh_status(musb_to_hcd(musb));
88 /* NOTE: it might really be A_WAIT_BCON ... */
89 musb->xceiv->state = OTG_STATE_A_HOST;
93 #ifdef CONFIG_USB_MUSB_HDRC_HCD
94 case OTG_STATE_A_HOST:
95 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
96 if (devctl & MUSB_DEVCTL_BDEVICE)
97 musb->xceiv->state = OTG_STATE_B_IDLE;
99 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
104 spin_unlock_irqrestore(&musb->lock, flags);
108 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
110 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
111 static unsigned long last_timer;
114 timeout = default_timeout;
116 /* Never idle if active, or when VBUS timeout is not set as host */
117 if (musb->is_active || ((musb->a_wait_bcon == 0)
118 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
119 DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
120 del_timer(&musb_idle_timer);
121 last_timer = jiffies;
125 if (time_after(last_timer, timeout)) {
126 if (!timer_pending(&musb_idle_timer))
127 last_timer = timeout;
129 DBG(4, "Longer idle timer already pending, ignoring\n");
133 last_timer = timeout;
135 DBG(4, "%s inactive, for idle timer for %lu ms\n",
136 otg_state_string(musb),
137 (unsigned long)jiffies_to_msecs(timeout - jiffies));
138 mod_timer(&musb_idle_timer, timeout);
141 static void omap2430_musb_enable(struct musb *musb)
145 static void omap2430_musb_disable(struct musb *musb)
149 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
152 /* HDRC controls CPEN, but beware current surges during device
153 * connect. They can trigger transient overcurrent conditions
154 * that must be ignored.
157 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
161 musb->xceiv->default_a = 1;
162 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
163 devctl |= MUSB_DEVCTL_SESSION;
169 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
170 * jumping right to B_IDLE...
173 musb->xceiv->default_a = 0;
174 musb->xceiv->state = OTG_STATE_B_IDLE;
175 devctl &= ~MUSB_DEVCTL_SESSION;
179 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
181 DBG(1, "VBUS %s, devctl %02x "
182 /* otg %3x conf %08x prcm %08x */ "\n",
183 otg_state_string(musb),
184 musb_readb(musb->mregs, MUSB_DEVCTL));
187 static int omap2430_musb_resume(struct musb *musb);
189 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
191 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
193 devctl |= MUSB_DEVCTL_SESSION;
194 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
199 static int omap2430_musb_init(struct musb *musb)
202 struct device *dev = musb->controller;
203 struct musb_hdrc_platform_data *plat = dev->platform_data;
204 struct omap_musb_board_data *data = plat->board_data;
206 /* We require some kind of external transceiver, hooked
207 * up through ULPI. TWL4030-family PMICs include one,
208 * which needs a driver, drivers aren't always needed.
210 musb->xceiv = otg_get_transceiver();
212 pr_err("HS USB OTG: no transceiver configured\n");
216 omap2430_musb_resume(musb);
218 l = musb_readl(musb->mregs, OTG_SYSCONFIG);
219 l &= ~ENABLEWAKEUP; /* disable wakeup */
220 l &= ~NOSTDBY; /* remove possible nostdby */
221 l |= SMARTSTDBY; /* enable smart standby */
222 l &= ~AUTOIDLE; /* disable auto idle */
223 l &= ~NOIDLE; /* remove possible noidle */
224 l |= SMARTIDLE; /* enable smart idle */
226 * MUSB AUTOIDLE don't work in 3430.
227 * Workaround by Richard Woodruff/TI
229 if (!cpu_is_omap3430())
230 l |= AUTOIDLE; /* enable auto idle */
231 musb_writel(musb->mregs, OTG_SYSCONFIG, l);
233 l = musb_readl(musb->mregs, OTG_INTERFSEL);
235 if (data->interface_type == MUSB_INTERFACE_UTMI) {
236 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
237 l &= ~ULPI_12PIN; /* Disable ULPI */
238 l |= UTMI_8BIT; /* Enable UTMI */
243 musb_writel(musb->mregs, OTG_INTERFSEL, l);
245 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
246 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
247 musb_readl(musb->mregs, OTG_REVISION),
248 musb_readl(musb->mregs, OTG_SYSCONFIG),
249 musb_readl(musb->mregs, OTG_SYSSTATUS),
250 musb_readl(musb->mregs, OTG_INTERFSEL),
251 musb_readl(musb->mregs, OTG_SIMENABLE));
253 if (is_host_enabled(musb))
254 musb->board_set_vbus = omap2430_musb_set_vbus;
256 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
262 void musb_platform_save_context(struct musb *musb,
263 struct musb_context_registers *musb_context)
265 musb_context->otg_sysconfig = musb_readl(musb->mregs, OTG_SYSCONFIG);
266 musb_context->otg_forcestandby = musb_readl(musb->mregs, OTG_FORCESTDBY);
269 void musb_platform_restore_context(struct musb *musb,
270 struct musb_context_registers *musb_context)
272 musb_writel(musb->mregs, OTG_SYSCONFIG, musb_context->otg_sysconfig);
273 musb_writel(musb->mregs, OTG_FORCESTDBY, musb_context->otg_forcestandby);
277 static int omap2430_musb_suspend(struct musb *musb)
282 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
283 l |= ENABLEFORCE; /* enable MSTANDBY */
284 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
286 l = musb_readl(musb->mregs, OTG_SYSCONFIG);
287 l |= ENABLEWAKEUP; /* enable wakeup */
288 musb_writel(musb->mregs, OTG_SYSCONFIG, l);
290 otg_set_suspend(musb->xceiv, 1);
295 static int omap2430_musb_resume(struct musb *musb)
299 otg_set_suspend(musb->xceiv, 0);
301 l = musb_readl(musb->mregs, OTG_SYSCONFIG);
302 l &= ~ENABLEWAKEUP; /* disable wakeup */
303 musb_writel(musb->mregs, OTG_SYSCONFIG, l);
305 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
306 l &= ~ENABLEFORCE; /* disable MSTANDBY */
307 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
312 static int omap2430_musb_exit(struct musb *musb)
315 omap2430_musb_suspend(musb);
317 otg_put_transceiver(musb->xceiv);
321 static const struct musb_platform_ops omap2430_ops = {
322 .init = omap2430_musb_init,
323 .exit = omap2430_musb_exit,
325 .suspend = omap2430_musb_suspend,
326 .resume = omap2430_musb_resume,
328 .enable = omap2430_musb_enable,
329 .disable = omap2430_musb_disable,
331 .set_mode = omap2430_musb_set_mode,
332 .try_idle = omap2430_musb_try_idle,
334 .set_vbus = omap2430_musb_set_vbus,
337 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
339 static int __init omap2430_probe(struct platform_device *pdev)
341 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
342 struct platform_device *musb;
343 struct omap2430_glue *glue;
348 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
350 dev_err(&pdev->dev, "failed to allocate glue context\n");
354 musb = platform_device_alloc("musb-hdrc", -1);
356 dev_err(&pdev->dev, "failed to allocate musb device\n");
360 clk = clk_get(&pdev->dev, "ick");
362 dev_err(&pdev->dev, "failed to get clock\n");
367 ret = clk_enable(clk);
369 dev_err(&pdev->dev, "failed to enable clock\n");
373 musb->dev.parent = &pdev->dev;
374 musb->dev.dma_mask = &omap2430_dmamask;
375 musb->dev.coherent_dma_mask = omap2430_dmamask;
377 glue->dev = &pdev->dev;
381 pdata->platform_ops = &omap2430_ops;
383 platform_set_drvdata(pdev, glue);
385 ret = platform_device_add_resources(musb, pdev->resource,
386 pdev->num_resources);
388 dev_err(&pdev->dev, "failed to add resources\n");
392 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
394 dev_err(&pdev->dev, "failed to add platform_data\n");
398 ret = platform_device_add(musb);
400 dev_err(&pdev->dev, "failed to register musb device\n");
413 platform_device_put(musb);
422 static int __exit omap2430_remove(struct platform_device *pdev)
424 struct omap2430_glue *glue = platform_get_drvdata(pdev);
426 platform_device_del(glue->musb);
427 platform_device_put(glue->musb);
428 clk_disable(glue->clk);
435 static struct platform_driver omap2430_driver = {
436 .remove = __exit_p(omap2430_remove),
438 .name = "musb-omap2430",
442 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
443 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
444 MODULE_LICENSE("GPL v2");
446 static int __init omap2430_init(void)
448 return platform_driver_probe(&omap2430_driver, omap2430_probe);
450 subsys_initcall(omap2430_init);
452 static void __exit omap2430_exit(void)
454 platform_driver_unregister(&omap2430_driver);
456 module_exit(omap2430_exit);