2 * Copyright (C) 2007,2008 Freescale semiconductor, Inc.
4 * Author: Li Yang <LeoLi@freescale.com>
5 * Jerry Huang <Chang-Ming.Huang@freescale.com>
7 * Initialization based on code from Shlomi Gridish.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/delay.h>
27 #include <linux/slab.h>
28 #include <linux/proc_fs.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/interrupt.h>
33 #include <linux/timer.h>
34 #include <linux/usb.h>
35 #include <linux/device.h>
36 #include <linux/usb/ch9.h>
37 #include <linux/usb/gadget.h>
38 #include <linux/workqueue.h>
39 #include <linux/time.h>
40 #include <linux/fsl_devices.h>
41 #include <linux/platform_device.h>
42 #include <linux/uaccess.h>
44 #include <asm/unaligned.h>
48 #define DRIVER_VERSION "Rev. 1.55"
49 #define DRIVER_AUTHOR "Jerry Huang/Li Yang"
50 #define DRIVER_DESC "Freescale USB OTG Transceiver Driver"
51 #define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION
53 static const char driver_name[] = "fsl-usb2-otg";
55 const pm_message_t otg_suspend_state = {
61 static struct usb_dr_mmap *usb_dr_regs;
62 static struct fsl_otg *fsl_otg_dev;
63 static int srp_wait_done;
66 struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr,
67 *b_ase0_brst_tmr, *b_se0_srp_tmr;
69 /* Driver specific timers */
70 struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr,
71 *b_srp_wait_tmr, *a_wait_enum_tmr;
73 static struct list_head active_timers;
75 static struct fsl_otg_config fsl_otg_initdata = {
80 static u32 _fsl_readl_be(const unsigned __iomem *p)
85 static u32 _fsl_readl_le(const unsigned __iomem *p)
90 static void _fsl_writel_be(u32 v, unsigned __iomem *p)
95 static void _fsl_writel_le(u32 v, unsigned __iomem *p)
100 static u32 (*_fsl_readl)(const unsigned __iomem *p);
101 static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
103 #define fsl_readl(p) (*_fsl_readl)((p))
104 #define fsl_writel(v, p) (*_fsl_writel)((v), (p))
107 #define fsl_readl(addr) readl(addr)
108 #define fsl_writel(val, addr) writel(val, addr)
109 #endif /* CONFIG_PPC32 */
111 /* Routines to access transceiver ULPI registers */
112 u8 view_ulpi(u8 addr)
116 temp = 0x40000000 | (addr << 16);
117 fsl_writel(temp, &usb_dr_regs->ulpiview);
120 temp = fsl_readl(&usb_dr_regs->ulpiview);
121 return (le32_to_cpu(temp) & 0x0000ff00) >> 8;
124 int write_ulpi(u8 addr, u8 data)
128 temp = 0x60000000 | (addr << 16) | data;
129 fsl_writel(temp, &usb_dr_regs->ulpiview);
133 /* -------------------------------------------------------------*/
134 /* Operations that will be called from OTG Finite State Machine */
136 /* Charge vbus for vbus pulsing in SRP */
137 void fsl_otg_chrg_vbus(int on)
141 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
144 /* stop discharging, start charging */
145 tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) |
146 OTGSC_CTRL_VBUS_CHARGE;
149 tmp &= ~OTGSC_CTRL_VBUS_CHARGE;
151 fsl_writel(tmp, &usb_dr_regs->otgsc);
154 /* Discharge vbus through a resistor to ground */
155 void fsl_otg_dischrg_vbus(int on)
159 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
162 /* stop charging, start discharging */
163 tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) |
164 OTGSC_CTRL_VBUS_DISCHARGE;
166 /* stop discharging */
167 tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE;
169 fsl_writel(tmp, &usb_dr_regs->otgsc);
172 /* A-device driver vbus, controlled through PP bit in PORTSC */
173 void fsl_otg_drv_vbus(int on)
178 tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS;
179 fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc);
181 tmp = fsl_readl(&usb_dr_regs->portsc) &
182 ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER;
183 fsl_writel(tmp, &usb_dr_regs->portsc);
188 * Pull-up D+, signalling connect by periperal. Also used in
189 * data-line pulsing in SRP
191 void fsl_otg_loc_conn(int on)
195 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
198 tmp |= OTGSC_CTRL_DATA_PULSING;
200 tmp &= ~OTGSC_CTRL_DATA_PULSING;
202 fsl_writel(tmp, &usb_dr_regs->otgsc);
206 * Generate SOF by host. This is controlled through suspend/resume the
207 * port. In host mode, controller will automatically send SOF.
208 * Suspend will block the data on the port.
210 void fsl_otg_loc_sof(int on)
214 tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS;
216 tmp |= PORTSC_PORT_FORCE_RESUME;
218 tmp |= PORTSC_PORT_SUSPEND;
220 fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc);
224 /* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */
225 void fsl_otg_start_pulse(void)
231 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
232 tmp |= OTGSC_HA_DATA_PULSE;
233 fsl_writel(tmp, &usb_dr_regs->otgsc);
238 fsl_otg_add_timer(b_data_pulse_tmr);
241 void b_data_pulse_end(unsigned long foo)
248 /* Do VBUS pulse after data pulse */
249 fsl_otg_pulse_vbus();
252 void fsl_otg_pulse_vbus(void)
255 fsl_otg_chrg_vbus(1);
256 /* start the timer to end vbus charge */
257 fsl_otg_add_timer(b_vbus_pulse_tmr);
260 void b_vbus_pulse_end(unsigned long foo)
262 fsl_otg_chrg_vbus(0);
265 * As USB3300 using the same a_sess_vld and b_sess_vld voltage
266 * we need to discharge the bus for a while to distinguish
267 * residual voltage of vbus pulsing and A device pull up
269 fsl_otg_dischrg_vbus(1);
270 fsl_otg_add_timer(b_srp_wait_tmr);
273 void b_srp_end(unsigned long foo)
275 fsl_otg_dischrg_vbus(0);
278 if ((fsl_otg_dev->phy.state == OTG_STATE_B_SRP_INIT) &&
279 fsl_otg_dev->fsm.b_sess_vld)
280 fsl_otg_dev->fsm.b_srp_done = 1;
284 * Workaround for a_host suspending too fast. When a_bus_req=0,
285 * a_host will start by SRP. It needs to set b_hnp_enable before
286 * actually suspending to start HNP
288 void a_wait_enum(unsigned long foo)
290 VDBG("a_wait_enum timeout\n");
291 if (!fsl_otg_dev->phy.otg->host->b_hnp_enable)
292 fsl_otg_add_timer(a_wait_enum_tmr);
294 otg_statemachine(&fsl_otg_dev->fsm);
297 /* The timeout callback function to set time out bit */
298 void set_tmout(unsigned long indicator)
300 *(int *)indicator = 1;
303 /* Initialize timers */
304 int fsl_otg_init_timers(struct otg_fsm *fsm)
306 /* FSM used timers */
307 a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
308 (unsigned long)&fsm->a_wait_vrise_tmout);
309 if (!a_wait_vrise_tmr)
312 a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON,
313 (unsigned long)&fsm->a_wait_bcon_tmout);
314 if (!a_wait_bcon_tmr)
317 a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
318 (unsigned long)&fsm->a_aidl_bdis_tmout);
319 if (!a_aidl_bdis_tmr)
322 b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST,
323 (unsigned long)&fsm->b_ase0_brst_tmout);
324 if (!b_ase0_brst_tmr)
327 b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
328 (unsigned long)&fsm->b_se0_srp);
332 b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL,
333 (unsigned long)&fsm->b_srp_done);
337 a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10,
338 (unsigned long)&fsm);
339 if (!a_wait_enum_tmr)
342 /* device driver used timers */
343 b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0);
347 b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end,
349 if (!b_data_pulse_tmr)
352 b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end,
354 if (!b_vbus_pulse_tmr)
360 /* Uninitialize timers */
361 void fsl_otg_uninit_timers(void)
363 /* FSM used timers */
364 if (a_wait_vrise_tmr != NULL)
365 kfree(a_wait_vrise_tmr);
366 if (a_wait_bcon_tmr != NULL)
367 kfree(a_wait_bcon_tmr);
368 if (a_aidl_bdis_tmr != NULL)
369 kfree(a_aidl_bdis_tmr);
370 if (b_ase0_brst_tmr != NULL)
371 kfree(b_ase0_brst_tmr);
372 if (b_se0_srp_tmr != NULL)
373 kfree(b_se0_srp_tmr);
374 if (b_srp_fail_tmr != NULL)
375 kfree(b_srp_fail_tmr);
376 if (a_wait_enum_tmr != NULL)
377 kfree(a_wait_enum_tmr);
379 /* device driver used timers */
380 if (b_srp_wait_tmr != NULL)
381 kfree(b_srp_wait_tmr);
382 if (b_data_pulse_tmr != NULL)
383 kfree(b_data_pulse_tmr);
384 if (b_vbus_pulse_tmr != NULL)
385 kfree(b_vbus_pulse_tmr);
388 /* Add timer to timer list */
389 void fsl_otg_add_timer(void *gtimer)
391 struct fsl_otg_timer *timer = gtimer;
392 struct fsl_otg_timer *tmp_timer;
395 * Check if the timer is already in the active list,
396 * if so update timer count
398 list_for_each_entry(tmp_timer, &active_timers, list)
399 if (tmp_timer == timer) {
400 timer->count = timer->expires;
403 timer->count = timer->expires;
404 list_add_tail(&timer->list, &active_timers);
407 /* Remove timer from the timer list; clear timeout status */
408 void fsl_otg_del_timer(void *gtimer)
410 struct fsl_otg_timer *timer = gtimer;
411 struct fsl_otg_timer *tmp_timer, *del_tmp;
413 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
414 if (tmp_timer == timer)
415 list_del(&timer->list);
419 * Reduce timer count by 1, and find timeout conditions.
420 * Called by fsl_otg 1ms timer interrupt
422 int fsl_otg_tick_timer(void)
424 struct fsl_otg_timer *tmp_timer, *del_tmp;
427 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
429 /* check if timer expires */
430 if (!tmp_timer->count) {
431 list_del(&tmp_timer->list);
432 tmp_timer->function(tmp_timer->data);
440 /* Reset controller, not reset the bus */
441 void otg_reset_controller(void)
445 command = fsl_readl(&usb_dr_regs->usbcmd);
447 fsl_writel(command, &usb_dr_regs->usbcmd);
448 while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1))
452 /* Call suspend/resume routines in host driver */
453 int fsl_otg_start_host(struct otg_fsm *fsm, int on)
455 struct usb_otg *otg = fsm->otg;
457 struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
462 dev = otg->host->controller;
465 * Update a_vbus_vld state as a_vbus_vld int is disabled
469 !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID);
471 /* start fsl usb host controller */
472 if (otg_dev->host_working)
475 otg_reset_controller();
476 VDBG("host on......\n");
477 if (dev->driver->pm && dev->driver->pm->resume) {
478 retval = dev->driver->pm->resume(dev);
483 * Workaround: b_host can't driver
484 * vbus, but PP in PORTSC needs to
485 * be 1 for host to work.
486 * So we set drv_vbus bit in
487 * transceiver to 0 thru ULPI.
489 write_ulpi(0x0c, 0x20);
493 otg_dev->host_working = 1;
496 /* stop fsl usb host controller */
497 if (!otg_dev->host_working)
500 VDBG("host off......\n");
501 if (dev && dev->driver) {
502 if (dev->driver->pm && dev->driver->pm->suspend)
503 retval = dev->driver->pm->suspend(dev);
508 otg_dev->host_working = 0;
516 * Call suspend and resume function in udc driver
517 * to stop and start udc driver.
519 int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
521 struct usb_otg *otg = fsm->otg;
524 if (!otg->gadget || !otg->gadget->dev.parent)
527 VDBG("gadget %s\n", on ? "on" : "off");
528 dev = otg->gadget->dev.parent;
531 if (dev->driver->resume)
532 dev->driver->resume(dev);
534 if (dev->driver->suspend)
535 dev->driver->suspend(dev, otg_suspend_state);
542 * Called by initialization code of host driver. Register host controller
543 * to the OTG. Suspend host for OTG role detection.
545 static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
547 struct fsl_otg *otg_dev;
552 otg_dev = container_of(otg->phy, struct fsl_otg, phy);
553 if (otg_dev != fsl_otg_dev)
558 otg_dev->fsm.a_bus_drop = 0;
559 otg_dev->fsm.a_bus_req = 1;
562 VDBG("host off......\n");
564 otg->host->otg_port = fsl_otg_initdata.otg_port;
565 otg->host->is_b_host = otg_dev->fsm.id;
567 * must leave time for khubd to finish its thing
568 * before yanking the host driver out from under it,
569 * so suspend the host after a short delay.
571 otg_dev->host_working = 1;
572 schedule_delayed_work(&otg_dev->otg_event, 100);
575 /* host driver going away */
576 if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) &
578 /* Mini-A cable connected */
579 struct otg_fsm *fsm = &otg_dev->fsm;
581 otg->phy->state = OTG_STATE_UNDEFINED;
582 fsm->protocol = PROTO_UNDEF;
586 otg_dev->host_working = 0;
588 otg_statemachine(&otg_dev->fsm);
593 /* Called by initialization code of udc. Register udc to OTG. */
594 static int fsl_otg_set_peripheral(struct usb_otg *otg,
595 struct usb_gadget *gadget)
597 struct fsl_otg *otg_dev;
602 otg_dev = container_of(otg->phy, struct fsl_otg, phy);
603 VDBG("otg_dev 0x%x\n", (int)otg_dev);
604 VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
605 if (otg_dev != fsl_otg_dev)
610 otg->gadget->ops->vbus_draw(otg->gadget, 0);
611 usb_gadget_vbus_disconnect(otg->gadget);
613 otg_dev->fsm.b_bus_req = 0;
614 otg_statemachine(&otg_dev->fsm);
618 otg->gadget = gadget;
619 otg->gadget->is_a_peripheral = !otg_dev->fsm.id;
621 otg_dev->fsm.b_bus_req = 1;
623 /* start the gadget right away if the ID pin says Mini-B */
624 DBG("ID pin=%d\n", otg_dev->fsm.id);
625 if (otg_dev->fsm.id == 1) {
626 fsl_otg_start_host(&otg_dev->fsm, 0);
627 otg_drv_vbus(&otg_dev->fsm, 0);
628 fsl_otg_start_gadget(&otg_dev->fsm, 1);
634 /* Set OTG port power, only for B-device */
635 static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA)
639 if (phy->state == OTG_STATE_B_PERIPHERAL)
640 pr_info("FSL OTG: Draw %d mA\n", mA);
646 * Delayed pin detect interrupt processing.
648 * When the Mini-A cable is disconnected from the board,
649 * the pin-detect interrupt happens before the disconnect
650 * interrupts for the connected device(s). In order to
651 * process the disconnect interrupt(s) prior to switching
652 * roles, the pin-detect interrupts are delayed, and handled
655 static void fsl_otg_event(struct work_struct *work)
657 struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work);
658 struct otg_fsm *fsm = &og->fsm;
660 if (fsm->id) { /* switch to gadget */
661 fsl_otg_start_host(fsm, 0);
662 otg_drv_vbus(fsm, 0);
663 fsl_otg_start_gadget(fsm, 1);
667 /* B-device start SRP */
668 static int fsl_otg_start_srp(struct usb_otg *otg)
670 struct fsl_otg *otg_dev;
672 if (!otg || otg->phy->state != OTG_STATE_B_IDLE)
675 otg_dev = container_of(otg->phy, struct fsl_otg, phy);
676 if (otg_dev != fsl_otg_dev)
679 otg_dev->fsm.b_bus_req = 1;
680 otg_statemachine(&otg_dev->fsm);
685 /* A_host suspend will call this function to start hnp */
686 static int fsl_otg_start_hnp(struct usb_otg *otg)
688 struct fsl_otg *otg_dev;
693 otg_dev = container_of(otg->phy, struct fsl_otg, phy);
694 if (otg_dev != fsl_otg_dev)
697 DBG("start_hnp...n");
699 /* clear a_bus_req to enter a_suspend state */
700 otg_dev->fsm.a_bus_req = 0;
701 otg_statemachine(&otg_dev->fsm);
707 * Interrupt handler. OTG/host/peripheral share the same int line.
708 * OTG driver clears OTGSC interrupts and leaves USB interrupts
709 * intact. It needs to have knowledge of some USB interrupts
710 * such as port change.
712 irqreturn_t fsl_otg_isr(int irq, void *dev_id)
714 struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
715 struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
716 u32 otg_int_src, otg_sc;
718 otg_sc = fsl_readl(&usb_dr_regs->otgsc);
719 otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8);
721 /* Only clear otg interrupts */
722 fsl_writel(otg_sc, &usb_dr_regs->otgsc);
724 /*FIXME: ID change not generate when init to 0 */
725 fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
726 otg->default_a = (fsm->id == 0);
728 /* process OTG interrupts */
730 if (otg_int_src & OTGSC_INTSTS_USB_ID) {
731 fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
732 otg->default_a = (fsm->id == 0);
733 /* clear conn information */
740 otg->host->is_b_host = fsm->id;
742 otg->gadget->is_a_peripheral = !fsm->id;
743 VDBG("ID int (ID is %d)\n", fsm->id);
745 if (fsm->id) { /* switch to gadget */
746 schedule_delayed_work(
747 &((struct fsl_otg *)dev_id)->otg_event,
749 } else { /* switch to host */
750 cancel_delayed_work(&
751 ((struct fsl_otg *)dev_id)->
753 fsl_otg_start_gadget(fsm, 0);
754 otg_drv_vbus(fsm, 1);
755 fsl_otg_start_host(fsm, 1);
763 static struct otg_fsm_ops fsl_otg_ops = {
764 .chrg_vbus = fsl_otg_chrg_vbus,
765 .drv_vbus = fsl_otg_drv_vbus,
766 .loc_conn = fsl_otg_loc_conn,
767 .loc_sof = fsl_otg_loc_sof,
768 .start_pulse = fsl_otg_start_pulse,
770 .add_timer = fsl_otg_add_timer,
771 .del_timer = fsl_otg_del_timer,
773 .start_host = fsl_otg_start_host,
774 .start_gadget = fsl_otg_start_gadget,
777 /* Initialize the global variable fsl_otg_dev and request IRQ for OTG */
778 static int fsl_otg_conf(struct platform_device *pdev)
780 struct fsl_otg *fsl_otg_tc;
786 /* allocate space to fsl otg device */
787 fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL);
791 fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
792 if (!fsl_otg_tc->phy.otg) {
797 INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event);
799 INIT_LIST_HEAD(&active_timers);
800 status = fsl_otg_init_timers(&fsl_otg_tc->fsm);
802 pr_info("Couldn't init OTG timers\n");
805 spin_lock_init(&fsl_otg_tc->fsm.lock);
807 /* Set OTG state machine operations */
808 fsl_otg_tc->fsm.ops = &fsl_otg_ops;
810 /* initialize the otg structure */
811 fsl_otg_tc->phy.label = DRIVER_DESC;
812 fsl_otg_tc->phy.set_power = fsl_otg_set_power;
814 fsl_otg_tc->phy.otg->phy = &fsl_otg_tc->phy;
815 fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host;
816 fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral;
817 fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp;
818 fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp;
820 fsl_otg_dev = fsl_otg_tc;
822 /* Store the otg transceiver */
823 status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
825 pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n");
831 fsl_otg_uninit_timers();
832 kfree(fsl_otg_tc->phy.otg);
837 /* OTG Initialization */
838 int usb_otg_start(struct platform_device *pdev)
840 struct fsl_otg *p_otg;
841 struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2);
844 struct resource *res;
846 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
848 p_otg = container_of(otg_trans, struct fsl_otg, phy);
851 /* Initialize the state machine structure with default values */
852 SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED);
853 fsm->otg = p_otg->phy.otg;
855 /* We don't require predefined MEM/IRQ resource index */
856 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
860 /* We don't request_mem_region here to enable resource sharing
861 * with host/device */
863 usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap));
864 p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs;
865 pdata->regs = (void *)usb_dr_regs;
867 if (pdata->init && pdata->init(pdev) != 0)
870 if (pdata->big_endian_mmio) {
871 _fsl_readl = _fsl_readl_be;
872 _fsl_writel = _fsl_writel_be;
874 _fsl_readl = _fsl_readl_le;
875 _fsl_writel = _fsl_writel_le;
879 p_otg->irq = platform_get_irq(pdev, 0);
880 status = request_irq(p_otg->irq, fsl_otg_isr,
881 IRQF_SHARED, driver_name, p_otg);
883 dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n",
885 iounmap(p_otg->dr_mem_map);
886 kfree(p_otg->phy.otg);
891 /* stop the controller */
892 temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
893 temp &= ~USB_CMD_RUN_STOP;
894 fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
896 /* reset the controller */
897 temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
898 temp |= USB_CMD_CTRL_RESET;
899 fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
901 /* wait reset completed */
902 while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET)
905 /* configure the VBUSHS as IDLE(both host and device) */
906 temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0);
907 fsl_writel(temp, &p_otg->dr_mem_map->usbmode);
909 /* configure PHY interface */
910 temp = fsl_readl(&p_otg->dr_mem_map->portsc);
911 temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
912 switch (pdata->phy_mode) {
913 case FSL_USB2_PHY_ULPI:
914 temp |= PORTSC_PTS_ULPI;
916 case FSL_USB2_PHY_UTMI_WIDE:
917 temp |= PORTSC_PTW_16BIT;
919 case FSL_USB2_PHY_UTMI:
920 temp |= PORTSC_PTS_UTMI;
925 fsl_writel(temp, &p_otg->dr_mem_map->portsc);
927 if (pdata->have_sysif_regs) {
928 /* configure control enable IO output, big endian register */
929 temp = __raw_readl(&p_otg->dr_mem_map->control);
930 temp |= USB_CTRL_IOENB;
931 __raw_writel(temp, &p_otg->dr_mem_map->control);
934 /* disable all interrupt and clear all OTGSC status */
935 temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
936 temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK;
937 temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
938 fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
941 * The identification (id) input is FALSE when a Mini-A plug is inserted
942 * in the devices Mini-AB receptacle. Otherwise, this input is TRUE.
943 * Also: record initial state of ID pin
945 if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) {
946 p_otg->phy.state = OTG_STATE_UNDEFINED;
949 p_otg->phy.state = OTG_STATE_A_IDLE;
953 DBG("initial ID pin=%d\n", p_otg->fsm.id);
955 /* enable OTG ID pin interrupt */
956 temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
957 temp |= OTGSC_INTR_USB_ID_EN;
958 temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN);
959 fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
965 * state file in sysfs
967 static int show_fsl_usb2_otg_state(struct device *dev,
968 struct device_attribute *attr, char *buf)
970 struct otg_fsm *fsm = &fsl_otg_dev->fsm;
972 unsigned size = PAGE_SIZE;
976 spin_lock_irqsave(&fsm->lock, flags);
978 /* basic driver infomation */
979 t = scnprintf(next, size,
980 DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n",
986 t = scnprintf(next, size,
993 fsl_readl(&usb_dr_regs->otgsc),
994 fsl_readl(&usb_dr_regs->portsc),
995 fsl_readl(&usb_dr_regs->usbmode),
996 fsl_readl(&usb_dr_regs->usbcmd),
997 fsl_readl(&usb_dr_regs->usbsts),
998 fsl_readl(&usb_dr_regs->usbintr));
1003 t = scnprintf(next, size,
1004 "OTG state: %s\n\n",
1005 otg_state_string(fsl_otg_dev->phy.state));
1009 /* State Machine Variables */
1010 t = scnprintf(next, size,
1013 "a_bus_resume: %d\n"
1014 "a_bus_suspend: %d\n"
1019 "b_bus_resume: %d\n"
1020 "b_bus_suspend: %d\n"
1044 spin_unlock_irqrestore(&fsm->lock, flags);
1046 return PAGE_SIZE - size;
1049 static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL);
1052 /* Char driver interface to control some OTG input */
1055 * Handle some ioctl command, such as get otg
1056 * status and set host suspend
1058 static long fsl_otg_ioctl(struct file *file, unsigned int cmd,
1064 case GET_OTG_STATUS:
1065 retval = fsl_otg_dev->host_working;
1068 case SET_A_SUSPEND_REQ:
1069 fsl_otg_dev->fsm.a_suspend_req = arg;
1072 case SET_A_BUS_DROP:
1073 fsl_otg_dev->fsm.a_bus_drop = arg;
1077 fsl_otg_dev->fsm.a_bus_req = arg;
1081 fsl_otg_dev->fsm.b_bus_req = arg;
1088 otg_statemachine(&fsl_otg_dev->fsm);
1093 static int fsl_otg_open(struct inode *inode, struct file *file)
1098 static int fsl_otg_release(struct inode *inode, struct file *file)
1103 static const struct file_operations otg_fops = {
1104 .owner = THIS_MODULE,
1108 .unlocked_ioctl = fsl_otg_ioctl,
1109 .open = fsl_otg_open,
1110 .release = fsl_otg_release,
1113 static int __devinit fsl_otg_probe(struct platform_device *pdev)
1117 if (!pdev->dev.platform_data)
1120 /* configure the OTG */
1121 ret = fsl_otg_conf(pdev);
1123 dev_err(&pdev->dev, "Couldn't configure OTG module\n");
1128 ret = usb_otg_start(pdev);
1130 dev_err(&pdev->dev, "Can't init FSL OTG device\n");
1134 ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops);
1136 dev_err(&pdev->dev, "unable to register FSL OTG device\n");
1140 ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
1142 dev_warn(&pdev->dev, "Can't register sysfs attribute\n");
1147 static int __devexit fsl_otg_remove(struct platform_device *pdev)
1149 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
1151 usb_remove_phy(&fsl_otg_dev->phy);
1152 free_irq(fsl_otg_dev->irq, fsl_otg_dev);
1154 iounmap((void *)usb_dr_regs);
1156 fsl_otg_uninit_timers();
1157 kfree(fsl_otg_dev->phy.otg);
1160 device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
1162 unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
1170 struct platform_driver fsl_otg_driver = {
1171 .probe = fsl_otg_probe,
1172 .remove = __devexit_p(fsl_otg_remove),
1174 .name = driver_name,
1175 .owner = THIS_MODULE,
1179 module_platform_driver(fsl_otg_driver);
1181 MODULE_DESCRIPTION(DRIVER_INFO);
1182 MODULE_AUTHOR(DRIVER_AUTHOR);
1183 MODULE_LICENSE("GPL");