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/slab.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/clk.h>
36 #include <asm/mach-types.h>
37 #include <mach/hardware.h>
40 #include "musb_core.h"
43 #ifdef CONFIG_ARCH_OMAP3430
44 #define get_cpu_rev() 2
47 #define MUSB_TIMEOUT_A_WAIT_BCON 1100
49 static struct timer_list musb_idle_timer;
51 static void musb_do_idle(unsigned long _musb)
53 struct musb *musb = (void *)_musb;
55 #ifdef CONFIG_USB_MUSB_HDRC_HCD
60 spin_lock_irqsave(&musb->lock, flags);
62 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
64 switch (musb->xceiv.state) {
65 case OTG_STATE_A_WAIT_BCON:
66 devctl &= ~MUSB_DEVCTL_SESSION;
67 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
69 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
70 if (devctl & MUSB_DEVCTL_BDEVICE) {
71 musb->xceiv.state = OTG_STATE_B_IDLE;
74 musb->xceiv.state = OTG_STATE_A_IDLE;
78 #ifdef CONFIG_USB_MUSB_HDRC_HCD
79 case OTG_STATE_A_SUSPEND:
80 /* finish RESUME signaling? */
81 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
82 power = musb_readb(musb->mregs, MUSB_POWER);
83 power &= ~MUSB_POWER_RESUME;
84 DBG(1, "root port resume stopped, power %02x\n", power);
85 musb_writeb(musb->mregs, MUSB_POWER, power);
87 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
88 | MUSB_PORT_STAT_RESUME);
89 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
90 usb_hcd_poll_rh_status(musb_to_hcd(musb));
91 /* NOTE: it might really be A_WAIT_BCON ... */
92 musb->xceiv.state = OTG_STATE_A_HOST;
96 #ifdef CONFIG_USB_MUSB_HDRC_HCD
97 case OTG_STATE_A_HOST:
98 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
99 if (devctl & MUSB_DEVCTL_BDEVICE)
100 musb->xceiv.state = OTG_STATE_B_IDLE;
102 musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
107 spin_unlock_irqrestore(&musb->lock, flags);
111 void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
113 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
114 static unsigned long last_timer;
117 timeout = default_timeout;
119 /* Never idle if active, or when VBUS timeout is not set as host */
120 if (musb->is_active || ((musb->a_wait_bcon == 0)
121 && (musb->xceiv.state == OTG_STATE_A_WAIT_BCON))) {
122 DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
123 del_timer(&musb_idle_timer);
124 last_timer = jiffies;
128 if (time_after(last_timer, timeout)) {
129 if (!timer_pending(&musb_idle_timer))
130 last_timer = timeout;
132 DBG(4, "Longer idle timer already pending, ignoring\n");
136 last_timer = timeout;
138 DBG(4, "%s inactive, for idle timer for %lu ms\n",
139 otg_state_string(musb),
140 (unsigned long)jiffies_to_msecs(timeout - jiffies));
141 mod_timer(&musb_idle_timer, timeout);
144 void musb_platform_enable(struct musb *musb)
147 void musb_platform_disable(struct musb *musb)
150 static void omap_vbus_power(struct musb *musb, int is_on, int sleeping)
154 static void omap_set_vbus(struct musb *musb, int is_on)
157 /* HDRC controls CPEN, but beware current surges during device
158 * connect. They can trigger transient overcurrent conditions
159 * that must be ignored.
162 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
166 musb->xceiv.default_a = 1;
167 musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
168 devctl |= MUSB_DEVCTL_SESSION;
174 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
175 * jumping right to B_IDLE...
178 musb->xceiv.default_a = 0;
179 musb->xceiv.state = OTG_STATE_B_IDLE;
180 devctl &= ~MUSB_DEVCTL_SESSION;
184 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
186 DBG(1, "VBUS %s, devctl %02x "
187 /* otg %3x conf %08x prcm %08x */ "\n",
188 otg_state_string(musb),
189 musb_readb(musb->mregs, MUSB_DEVCTL));
191 static int omap_set_power(struct otg_transceiver *x, unsigned mA)
196 static int musb_platform_resume(struct musb *musb);
198 int musb_platform_set_mode(struct musb *musb, u8 musb_mode)
200 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
202 devctl |= MUSB_DEVCTL_SESSION;
203 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
206 #ifdef CONFIG_USB_MUSB_HDRC_HCD
208 otg_set_host(&musb->xceiv, musb->xceiv.host);
211 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
212 case MUSB_PERIPHERAL:
213 otg_set_peripheral(&musb->xceiv, musb->xceiv.gadget);
216 #ifdef CONFIG_USB_MUSB_OTG
226 int __init musb_platform_init(struct musb *musb)
230 #if defined(CONFIG_ARCH_OMAP2430)
231 omap_cfg_reg(AE5_2430_USB0HS_STP);
234 musb_platform_resume(musb);
236 l = omap_readl(OTG_SYSCONFIG);
237 l &= ~ENABLEWAKEUP; /* disable wakeup */
238 l &= ~NOSTDBY; /* remove possible nostdby */
239 l |= SMARTSTDBY; /* enable smart standby */
240 l &= ~AUTOIDLE; /* disable auto idle */
241 l &= ~NOIDLE; /* remove possible noidle */
242 l |= SMARTIDLE; /* enable smart idle */
243 l |= AUTOIDLE; /* enable auto idle */
244 omap_writel(l, OTG_SYSCONFIG);
246 l = omap_readl(OTG_INTERFSEL);
248 omap_writel(l, OTG_INTERFSEL);
250 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
251 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
252 omap_readl(OTG_REVISION), omap_readl(OTG_SYSCONFIG),
253 omap_readl(OTG_SYSSTATUS), omap_readl(OTG_INTERFSEL),
254 omap_readl(OTG_SIMENABLE));
256 omap_vbus_power(musb, musb->board_mode == MUSB_HOST, 1);
258 if (is_host_enabled(musb))
259 musb->board_set_vbus = omap_set_vbus;
260 if (is_peripheral_enabled(musb))
261 musb->xceiv.set_power = omap_set_power;
262 musb->a_wait_bcon = MUSB_TIMEOUT_A_WAIT_BCON;
264 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
269 int musb_platform_suspend(struct musb *musb)
277 l = omap_readl(OTG_FORCESTDBY);
278 l |= ENABLEFORCE; /* enable MSTANDBY */
279 omap_writel(l, OTG_FORCESTDBY);
281 l = omap_readl(OTG_SYSCONFIG);
282 l |= ENABLEWAKEUP; /* enable wakeup */
283 omap_writel(l, OTG_SYSCONFIG);
285 if (musb->xceiv.set_suspend)
286 musb->xceiv.set_suspend(&musb->xceiv, 1);
289 musb->set_clock(musb->clock, 0);
291 clk_disable(musb->clock);
296 static int musb_platform_resume(struct musb *musb)
303 if (musb->xceiv.set_suspend)
304 musb->xceiv.set_suspend(&musb->xceiv, 0);
307 musb->set_clock(musb->clock, 1);
309 clk_enable(musb->clock);
311 l = omap_readl(OTG_SYSCONFIG);
312 l &= ~ENABLEWAKEUP; /* disable wakeup */
313 omap_writel(l, OTG_SYSCONFIG);
315 l = omap_readl(OTG_FORCESTDBY);
316 l &= ~ENABLEFORCE; /* disable MSTANDBY */
317 omap_writel(l, OTG_FORCESTDBY);
323 int musb_platform_exit(struct musb *musb)
326 omap_vbus_power(musb, 0 /*off*/, 1);
328 musb_platform_suspend(musb);
330 clk_put(musb->clock);