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/interrupt.h>
32 #include <linux/timer.h>
33 #include <linux/usb.h>
34 #include <linux/device.h>
35 #include <linux/usb/ch9.h>
36 #include <linux/usb/gadget.h>
37 #include <linux/workqueue.h>
38 #include <linux/time.h>
39 #include <linux/fsl_devices.h>
40 #include <linux/platform_device.h>
41 #include <linux/uaccess.h>
43 #include <asm/unaligned.h>
45 #include "phy-fsl-usb.h"
47 #define DRIVER_VERSION "Rev. 1.55"
48 #define DRIVER_AUTHOR "Jerry Huang/Li Yang"
49 #define DRIVER_DESC "Freescale USB OTG Transceiver Driver"
50 #define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION
52 static const char driver_name[] = "fsl-usb2-otg";
54 const pm_message_t otg_suspend_state = {
60 static struct usb_dr_mmap *usb_dr_regs;
61 static struct fsl_otg *fsl_otg_dev;
62 static int srp_wait_done;
65 struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr,
66 *b_ase0_brst_tmr, *b_se0_srp_tmr;
68 /* Driver specific timers */
69 struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr,
70 *b_srp_wait_tmr, *a_wait_enum_tmr;
72 static struct list_head active_timers;
74 static struct fsl_otg_config fsl_otg_initdata = {
79 static u32 _fsl_readl_be(const unsigned __iomem *p)
84 static u32 _fsl_readl_le(const unsigned __iomem *p)
89 static void _fsl_writel_be(u32 v, unsigned __iomem *p)
94 static void _fsl_writel_le(u32 v, unsigned __iomem *p)
99 static u32 (*_fsl_readl)(const unsigned __iomem *p);
100 static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
102 #define fsl_readl(p) (*_fsl_readl)((p))
103 #define fsl_writel(v, p) (*_fsl_writel)((v), (p))
106 #define fsl_readl(addr) readl(addr)
107 #define fsl_writel(val, addr) writel(val, addr)
108 #endif /* CONFIG_PPC32 */
110 /* Routines to access transceiver ULPI registers */
111 u8 view_ulpi(u8 addr)
115 temp = 0x40000000 | (addr << 16);
116 fsl_writel(temp, &usb_dr_regs->ulpiview);
119 temp = fsl_readl(&usb_dr_regs->ulpiview);
120 return (le32_to_cpu(temp) & 0x0000ff00) >> 8;
123 int write_ulpi(u8 addr, u8 data)
127 temp = 0x60000000 | (addr << 16) | data;
128 fsl_writel(temp, &usb_dr_regs->ulpiview);
132 /* -------------------------------------------------------------*/
133 /* Operations that will be called from OTG Finite State Machine */
135 /* Charge vbus for vbus pulsing in SRP */
136 void fsl_otg_chrg_vbus(struct otg_fsm *fsm, int on)
140 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
143 /* stop discharging, start charging */
144 tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) |
145 OTGSC_CTRL_VBUS_CHARGE;
148 tmp &= ~OTGSC_CTRL_VBUS_CHARGE;
150 fsl_writel(tmp, &usb_dr_regs->otgsc);
153 /* Discharge vbus through a resistor to ground */
154 void fsl_otg_dischrg_vbus(int on)
158 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
161 /* stop charging, start discharging */
162 tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) |
163 OTGSC_CTRL_VBUS_DISCHARGE;
165 /* stop discharging */
166 tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE;
168 fsl_writel(tmp, &usb_dr_regs->otgsc);
171 /* A-device driver vbus, controlled through PP bit in PORTSC */
172 void fsl_otg_drv_vbus(struct otg_fsm *fsm, int on)
177 tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS;
178 fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc);
180 tmp = fsl_readl(&usb_dr_regs->portsc) &
181 ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER;
182 fsl_writel(tmp, &usb_dr_regs->portsc);
187 * Pull-up D+, signalling connect by periperal. Also used in
188 * data-line pulsing in SRP
190 void fsl_otg_loc_conn(struct otg_fsm *fsm, int on)
194 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
197 tmp |= OTGSC_CTRL_DATA_PULSING;
199 tmp &= ~OTGSC_CTRL_DATA_PULSING;
201 fsl_writel(tmp, &usb_dr_regs->otgsc);
205 * Generate SOF by host. This is controlled through suspend/resume the
206 * port. In host mode, controller will automatically send SOF.
207 * Suspend will block the data on the port.
209 void fsl_otg_loc_sof(struct otg_fsm *fsm, int on)
213 tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS;
215 tmp |= PORTSC_PORT_FORCE_RESUME;
217 tmp |= PORTSC_PORT_SUSPEND;
219 fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc);
223 /* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */
224 void fsl_otg_start_pulse(struct otg_fsm *fsm)
230 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
231 tmp |= OTGSC_HA_DATA_PULSE;
232 fsl_writel(tmp, &usb_dr_regs->otgsc);
237 fsl_otg_add_timer(fsm, b_data_pulse_tmr);
240 void b_data_pulse_end(unsigned long foo)
247 /* Do VBUS pulse after data pulse */
248 fsl_otg_pulse_vbus();
251 void fsl_otg_pulse_vbus(void)
254 fsl_otg_chrg_vbus(&fsl_otg_dev->fsm, 1);
255 /* start the timer to end vbus charge */
256 fsl_otg_add_timer(&fsl_otg_dev->fsm, b_vbus_pulse_tmr);
259 void b_vbus_pulse_end(unsigned long foo)
261 fsl_otg_chrg_vbus(&fsl_otg_dev->fsm, 0);
264 * As USB3300 using the same a_sess_vld and b_sess_vld voltage
265 * we need to discharge the bus for a while to distinguish
266 * residual voltage of vbus pulsing and A device pull up
268 fsl_otg_dischrg_vbus(1);
269 fsl_otg_add_timer(&fsl_otg_dev->fsm, b_srp_wait_tmr);
272 void b_srp_end(unsigned long foo)
274 fsl_otg_dischrg_vbus(0);
277 if ((fsl_otg_dev->phy.otg->state == OTG_STATE_B_SRP_INIT) &&
278 fsl_otg_dev->fsm.b_sess_vld)
279 fsl_otg_dev->fsm.b_srp_done = 1;
283 * Workaround for a_host suspending too fast. When a_bus_req=0,
284 * a_host will start by SRP. It needs to set b_hnp_enable before
285 * actually suspending to start HNP
287 void a_wait_enum(unsigned long foo)
289 VDBG("a_wait_enum timeout\n");
290 if (!fsl_otg_dev->phy.otg->host->b_hnp_enable)
291 fsl_otg_add_timer(&fsl_otg_dev->fsm, a_wait_enum_tmr);
293 otg_statemachine(&fsl_otg_dev->fsm);
296 /* The timeout callback function to set time out bit */
297 void set_tmout(unsigned long indicator)
299 *(int *)indicator = 1;
302 /* Initialize timers */
303 int fsl_otg_init_timers(struct otg_fsm *fsm)
305 /* FSM used timers */
306 a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
307 (unsigned long)&fsm->a_wait_vrise_tmout);
308 if (!a_wait_vrise_tmr)
311 a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON,
312 (unsigned long)&fsm->a_wait_bcon_tmout);
313 if (!a_wait_bcon_tmr)
316 a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
317 (unsigned long)&fsm->a_aidl_bdis_tmout);
318 if (!a_aidl_bdis_tmr)
321 b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST,
322 (unsigned long)&fsm->b_ase0_brst_tmout);
323 if (!b_ase0_brst_tmr)
326 b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
327 (unsigned long)&fsm->b_se0_srp);
331 b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL,
332 (unsigned long)&fsm->b_srp_done);
336 a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10,
337 (unsigned long)&fsm);
338 if (!a_wait_enum_tmr)
341 /* device driver used timers */
342 b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0);
346 b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end,
348 if (!b_data_pulse_tmr)
351 b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end,
353 if (!b_vbus_pulse_tmr)
359 /* Uninitialize timers */
360 void fsl_otg_uninit_timers(void)
362 /* FSM used timers */
363 kfree(a_wait_vrise_tmr);
364 kfree(a_wait_bcon_tmr);
365 kfree(a_aidl_bdis_tmr);
366 kfree(b_ase0_brst_tmr);
367 kfree(b_se0_srp_tmr);
368 kfree(b_srp_fail_tmr);
369 kfree(a_wait_enum_tmr);
371 /* device driver used timers */
372 kfree(b_srp_wait_tmr);
373 kfree(b_data_pulse_tmr);
374 kfree(b_vbus_pulse_tmr);
377 static struct fsl_otg_timer *fsl_otg_get_timer(enum otg_fsm_timer t)
379 struct fsl_otg_timer *timer;
381 /* REVISIT: use array of pointers to timers instead */
384 timer = a_wait_vrise_tmr;
387 timer = a_wait_vrise_tmr;
390 timer = a_wait_vrise_tmr;
393 timer = a_wait_vrise_tmr;
396 timer = a_wait_vrise_tmr;
399 timer = a_wait_vrise_tmr;
402 timer = a_wait_vrise_tmr;
411 /* Add timer to timer list */
412 void fsl_otg_add_timer(struct otg_fsm *fsm, void *gtimer)
414 struct fsl_otg_timer *timer = gtimer;
415 struct fsl_otg_timer *tmp_timer;
418 * Check if the timer is already in the active list,
419 * if so update timer count
421 list_for_each_entry(tmp_timer, &active_timers, list)
422 if (tmp_timer == timer) {
423 timer->count = timer->expires;
426 timer->count = timer->expires;
427 list_add_tail(&timer->list, &active_timers);
430 static void fsl_otg_fsm_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
432 struct fsl_otg_timer *timer;
434 timer = fsl_otg_get_timer(t);
438 fsl_otg_add_timer(fsm, timer);
441 /* Remove timer from the timer list; clear timeout status */
442 void fsl_otg_del_timer(struct otg_fsm *fsm, void *gtimer)
444 struct fsl_otg_timer *timer = gtimer;
445 struct fsl_otg_timer *tmp_timer, *del_tmp;
447 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
448 if (tmp_timer == timer)
449 list_del(&timer->list);
452 static void fsl_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
454 struct fsl_otg_timer *timer;
456 timer = fsl_otg_get_timer(t);
460 fsl_otg_del_timer(fsm, timer);
464 * Reduce timer count by 1, and find timeout conditions.
465 * Called by fsl_otg 1ms timer interrupt
467 int fsl_otg_tick_timer(void)
469 struct fsl_otg_timer *tmp_timer, *del_tmp;
472 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
474 /* check if timer expires */
475 if (!tmp_timer->count) {
476 list_del(&tmp_timer->list);
477 tmp_timer->function(tmp_timer->data);
485 /* Reset controller, not reset the bus */
486 void otg_reset_controller(void)
490 command = fsl_readl(&usb_dr_regs->usbcmd);
492 fsl_writel(command, &usb_dr_regs->usbcmd);
493 while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1))
497 /* Call suspend/resume routines in host driver */
498 int fsl_otg_start_host(struct otg_fsm *fsm, int on)
500 struct usb_otg *otg = fsm->otg;
502 struct fsl_otg *otg_dev =
503 container_of(otg->usb_phy, struct fsl_otg, phy);
508 dev = otg->host->controller;
511 * Update a_vbus_vld state as a_vbus_vld int is disabled
515 !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID);
517 /* start fsl usb host controller */
518 if (otg_dev->host_working)
521 otg_reset_controller();
522 VDBG("host on......\n");
523 if (dev->driver->pm && dev->driver->pm->resume) {
524 retval = dev->driver->pm->resume(dev);
527 fsl_otg_drv_vbus(fsm, 1);
529 * Workaround: b_host can't driver
530 * vbus, but PP in PORTSC needs to
531 * be 1 for host to work.
532 * So we set drv_vbus bit in
533 * transceiver to 0 thru ULPI.
535 write_ulpi(0x0c, 0x20);
539 otg_dev->host_working = 1;
542 /* stop fsl usb host controller */
543 if (!otg_dev->host_working)
546 VDBG("host off......\n");
547 if (dev && dev->driver) {
548 if (dev->driver->pm && dev->driver->pm->suspend)
549 retval = dev->driver->pm->suspend(dev);
552 fsl_otg_drv_vbus(fsm, 0);
554 otg_dev->host_working = 0;
562 * Call suspend and resume function in udc driver
563 * to stop and start udc driver.
565 int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
567 struct usb_otg *otg = fsm->otg;
570 if (!otg->gadget || !otg->gadget->dev.parent)
573 VDBG("gadget %s\n", on ? "on" : "off");
574 dev = otg->gadget->dev.parent;
577 if (dev->driver->resume)
578 dev->driver->resume(dev);
580 if (dev->driver->suspend)
581 dev->driver->suspend(dev, otg_suspend_state);
588 * Called by initialization code of host driver. Register host controller
589 * to the OTG. Suspend host for OTG role detection.
591 static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
593 struct fsl_otg *otg_dev;
598 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
599 if (otg_dev != fsl_otg_dev)
604 otg_dev->fsm.a_bus_drop = 0;
605 otg_dev->fsm.a_bus_req = 1;
608 VDBG("host off......\n");
610 otg->host->otg_port = fsl_otg_initdata.otg_port;
611 otg->host->is_b_host = otg_dev->fsm.id;
613 * must leave time for hub_wq to finish its thing
614 * before yanking the host driver out from under it,
615 * so suspend the host after a short delay.
617 otg_dev->host_working = 1;
618 schedule_delayed_work(&otg_dev->otg_event, 100);
621 /* host driver going away */
622 if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) &
624 /* Mini-A cable connected */
625 struct otg_fsm *fsm = &otg_dev->fsm;
627 otg->state = OTG_STATE_UNDEFINED;
628 fsm->protocol = PROTO_UNDEF;
632 otg_dev->host_working = 0;
634 otg_statemachine(&otg_dev->fsm);
639 /* Called by initialization code of udc. Register udc to OTG. */
640 static int fsl_otg_set_peripheral(struct usb_otg *otg,
641 struct usb_gadget *gadget)
643 struct fsl_otg *otg_dev;
648 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
649 VDBG("otg_dev 0x%x\n", (int)otg_dev);
650 VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
651 if (otg_dev != fsl_otg_dev)
656 otg->gadget->ops->vbus_draw(otg->gadget, 0);
657 usb_gadget_vbus_disconnect(otg->gadget);
659 otg_dev->fsm.b_bus_req = 0;
660 otg_statemachine(&otg_dev->fsm);
664 otg->gadget = gadget;
665 otg->gadget->is_a_peripheral = !otg_dev->fsm.id;
667 otg_dev->fsm.b_bus_req = 1;
669 /* start the gadget right away if the ID pin says Mini-B */
670 pr_debug("ID pin=%d\n", otg_dev->fsm.id);
671 if (otg_dev->fsm.id == 1) {
672 fsl_otg_start_host(&otg_dev->fsm, 0);
673 otg_drv_vbus(&otg_dev->fsm, 0);
674 fsl_otg_start_gadget(&otg_dev->fsm, 1);
680 /* Set OTG port power, only for B-device */
681 static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA)
685 if (phy->otg->state == OTG_STATE_B_PERIPHERAL)
686 pr_info("FSL OTG: Draw %d mA\n", mA);
692 * Delayed pin detect interrupt processing.
694 * When the Mini-A cable is disconnected from the board,
695 * the pin-detect interrupt happens before the disconnect
696 * interrupts for the connected device(s). In order to
697 * process the disconnect interrupt(s) prior to switching
698 * roles, the pin-detect interrupts are delayed, and handled
701 static void fsl_otg_event(struct work_struct *work)
703 struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work);
704 struct otg_fsm *fsm = &og->fsm;
706 if (fsm->id) { /* switch to gadget */
707 fsl_otg_start_host(fsm, 0);
708 otg_drv_vbus(fsm, 0);
709 fsl_otg_start_gadget(fsm, 1);
713 /* B-device start SRP */
714 static int fsl_otg_start_srp(struct usb_otg *otg)
716 struct fsl_otg *otg_dev;
718 if (!otg || otg->state != OTG_STATE_B_IDLE)
721 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
722 if (otg_dev != fsl_otg_dev)
725 otg_dev->fsm.b_bus_req = 1;
726 otg_statemachine(&otg_dev->fsm);
731 /* A_host suspend will call this function to start hnp */
732 static int fsl_otg_start_hnp(struct usb_otg *otg)
734 struct fsl_otg *otg_dev;
739 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
740 if (otg_dev != fsl_otg_dev)
743 pr_debug("start_hnp...\n");
745 /* clear a_bus_req to enter a_suspend state */
746 otg_dev->fsm.a_bus_req = 0;
747 otg_statemachine(&otg_dev->fsm);
753 * Interrupt handler. OTG/host/peripheral share the same int line.
754 * OTG driver clears OTGSC interrupts and leaves USB interrupts
755 * intact. It needs to have knowledge of some USB interrupts
756 * such as port change.
758 irqreturn_t fsl_otg_isr(int irq, void *dev_id)
760 struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
761 struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
762 u32 otg_int_src, otg_sc;
764 otg_sc = fsl_readl(&usb_dr_regs->otgsc);
765 otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8);
767 /* Only clear otg interrupts */
768 fsl_writel(otg_sc, &usb_dr_regs->otgsc);
770 /*FIXME: ID change not generate when init to 0 */
771 fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
772 otg->default_a = (fsm->id == 0);
774 /* process OTG interrupts */
776 if (otg_int_src & OTGSC_INTSTS_USB_ID) {
777 fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
778 otg->default_a = (fsm->id == 0);
779 /* clear conn information */
786 otg->host->is_b_host = fsm->id;
788 otg->gadget->is_a_peripheral = !fsm->id;
789 VDBG("ID int (ID is %d)\n", fsm->id);
791 if (fsm->id) { /* switch to gadget */
792 schedule_delayed_work(
793 &((struct fsl_otg *)dev_id)->otg_event,
795 } else { /* switch to host */
796 cancel_delayed_work(&
797 ((struct fsl_otg *)dev_id)->
799 fsl_otg_start_gadget(fsm, 0);
800 otg_drv_vbus(fsm, 1);
801 fsl_otg_start_host(fsm, 1);
809 static struct otg_fsm_ops fsl_otg_ops = {
810 .chrg_vbus = fsl_otg_chrg_vbus,
811 .drv_vbus = fsl_otg_drv_vbus,
812 .loc_conn = fsl_otg_loc_conn,
813 .loc_sof = fsl_otg_loc_sof,
814 .start_pulse = fsl_otg_start_pulse,
816 .add_timer = fsl_otg_fsm_add_timer,
817 .del_timer = fsl_otg_fsm_del_timer,
819 .start_host = fsl_otg_start_host,
820 .start_gadget = fsl_otg_start_gadget,
823 /* Initialize the global variable fsl_otg_dev and request IRQ for OTG */
824 static int fsl_otg_conf(struct platform_device *pdev)
826 struct fsl_otg *fsl_otg_tc;
832 /* allocate space to fsl otg device */
833 fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL);
837 fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
838 if (!fsl_otg_tc->phy.otg) {
843 INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event);
845 INIT_LIST_HEAD(&active_timers);
846 status = fsl_otg_init_timers(&fsl_otg_tc->fsm);
848 pr_info("Couldn't init OTG timers\n");
851 mutex_init(&fsl_otg_tc->fsm.lock);
853 /* Set OTG state machine operations */
854 fsl_otg_tc->fsm.ops = &fsl_otg_ops;
856 /* initialize the otg structure */
857 fsl_otg_tc->phy.label = DRIVER_DESC;
858 fsl_otg_tc->phy.dev = &pdev->dev;
859 fsl_otg_tc->phy.set_power = fsl_otg_set_power;
861 fsl_otg_tc->phy.otg->usb_phy = &fsl_otg_tc->phy;
862 fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host;
863 fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral;
864 fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp;
865 fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp;
867 fsl_otg_dev = fsl_otg_tc;
869 /* Store the otg transceiver */
870 status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
872 pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n");
878 fsl_otg_uninit_timers();
879 kfree(fsl_otg_tc->phy.otg);
884 /* OTG Initialization */
885 int usb_otg_start(struct platform_device *pdev)
887 struct fsl_otg *p_otg;
888 struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2);
891 struct resource *res;
893 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
895 p_otg = container_of(otg_trans, struct fsl_otg, phy);
898 /* Initialize the state machine structure with default values */
899 SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED);
900 fsm->otg = p_otg->phy.otg;
902 /* We don't require predefined MEM/IRQ resource index */
903 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
907 /* We don't request_mem_region here to enable resource sharing
908 * with host/device */
910 usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap));
911 p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs;
912 pdata->regs = (void *)usb_dr_regs;
914 if (pdata->init && pdata->init(pdev) != 0)
917 if (pdata->big_endian_mmio) {
918 _fsl_readl = _fsl_readl_be;
919 _fsl_writel = _fsl_writel_be;
921 _fsl_readl = _fsl_readl_le;
922 _fsl_writel = _fsl_writel_le;
926 p_otg->irq = platform_get_irq(pdev, 0);
927 status = request_irq(p_otg->irq, fsl_otg_isr,
928 IRQF_SHARED, driver_name, p_otg);
930 dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n",
932 iounmap(p_otg->dr_mem_map);
933 kfree(p_otg->phy.otg);
938 /* stop the controller */
939 temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
940 temp &= ~USB_CMD_RUN_STOP;
941 fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
943 /* reset the controller */
944 temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
945 temp |= USB_CMD_CTRL_RESET;
946 fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
948 /* wait reset completed */
949 while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET)
952 /* configure the VBUSHS as IDLE(both host and device) */
953 temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0);
954 fsl_writel(temp, &p_otg->dr_mem_map->usbmode);
956 /* configure PHY interface */
957 temp = fsl_readl(&p_otg->dr_mem_map->portsc);
958 temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
959 switch (pdata->phy_mode) {
960 case FSL_USB2_PHY_ULPI:
961 temp |= PORTSC_PTS_ULPI;
963 case FSL_USB2_PHY_UTMI_WIDE:
964 temp |= PORTSC_PTW_16BIT;
966 case FSL_USB2_PHY_UTMI:
967 temp |= PORTSC_PTS_UTMI;
972 fsl_writel(temp, &p_otg->dr_mem_map->portsc);
974 if (pdata->have_sysif_regs) {
975 /* configure control enable IO output, big endian register */
976 temp = __raw_readl(&p_otg->dr_mem_map->control);
977 temp |= USB_CTRL_IOENB;
978 __raw_writel(temp, &p_otg->dr_mem_map->control);
981 /* disable all interrupt and clear all OTGSC status */
982 temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
983 temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK;
984 temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
985 fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
988 * The identification (id) input is FALSE when a Mini-A plug is inserted
989 * in the devices Mini-AB receptacle. Otherwise, this input is TRUE.
990 * Also: record initial state of ID pin
992 if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) {
993 p_otg->phy.otg->state = OTG_STATE_UNDEFINED;
996 p_otg->phy.otg->state = OTG_STATE_A_IDLE;
1000 pr_debug("initial ID pin=%d\n", p_otg->fsm.id);
1002 /* enable OTG ID pin interrupt */
1003 temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
1004 temp |= OTGSC_INTR_USB_ID_EN;
1005 temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN);
1006 fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
1012 * state file in sysfs
1014 static int show_fsl_usb2_otg_state(struct device *dev,
1015 struct device_attribute *attr, char *buf)
1017 struct otg_fsm *fsm = &fsl_otg_dev->fsm;
1019 unsigned size = PAGE_SIZE;
1022 mutex_lock(&fsm->lock);
1024 /* basic driver infomation */
1025 t = scnprintf(next, size,
1026 DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n",
1032 t = scnprintf(next, size,
1038 "USBINTR: 0x%08x\n",
1039 fsl_readl(&usb_dr_regs->otgsc),
1040 fsl_readl(&usb_dr_regs->portsc),
1041 fsl_readl(&usb_dr_regs->usbmode),
1042 fsl_readl(&usb_dr_regs->usbcmd),
1043 fsl_readl(&usb_dr_regs->usbsts),
1044 fsl_readl(&usb_dr_regs->usbintr));
1049 t = scnprintf(next, size,
1050 "OTG state: %s\n\n",
1051 usb_otg_state_string(fsl_otg_dev->phy.otg->state));
1055 /* State Machine Variables */
1056 t = scnprintf(next, size,
1059 "a_bus_resume: %d\n"
1060 "a_bus_suspend: %d\n"
1065 "b_bus_resume: %d\n"
1066 "b_bus_suspend: %d\n"
1090 mutex_unlock(&fsm->lock);
1092 return PAGE_SIZE - size;
1095 static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL);
1098 /* Char driver interface to control some OTG input */
1101 * Handle some ioctl command, such as get otg
1102 * status and set host suspend
1104 static long fsl_otg_ioctl(struct file *file, unsigned int cmd,
1110 case GET_OTG_STATUS:
1111 retval = fsl_otg_dev->host_working;
1114 case SET_A_SUSPEND_REQ:
1115 fsl_otg_dev->fsm.a_suspend_req_inf = arg;
1118 case SET_A_BUS_DROP:
1119 fsl_otg_dev->fsm.a_bus_drop = arg;
1123 fsl_otg_dev->fsm.a_bus_req = arg;
1127 fsl_otg_dev->fsm.b_bus_req = arg;
1134 otg_statemachine(&fsl_otg_dev->fsm);
1139 static int fsl_otg_open(struct inode *inode, struct file *file)
1144 static int fsl_otg_release(struct inode *inode, struct file *file)
1149 static const struct file_operations otg_fops = {
1150 .owner = THIS_MODULE,
1154 .unlocked_ioctl = fsl_otg_ioctl,
1155 .open = fsl_otg_open,
1156 .release = fsl_otg_release,
1159 static int fsl_otg_probe(struct platform_device *pdev)
1163 if (!dev_get_platdata(&pdev->dev))
1166 /* configure the OTG */
1167 ret = fsl_otg_conf(pdev);
1169 dev_err(&pdev->dev, "Couldn't configure OTG module\n");
1174 ret = usb_otg_start(pdev);
1176 dev_err(&pdev->dev, "Can't init FSL OTG device\n");
1180 ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops);
1182 dev_err(&pdev->dev, "unable to register FSL OTG device\n");
1186 ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
1188 dev_warn(&pdev->dev, "Can't register sysfs attribute\n");
1193 static int fsl_otg_remove(struct platform_device *pdev)
1195 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
1197 usb_remove_phy(&fsl_otg_dev->phy);
1198 free_irq(fsl_otg_dev->irq, fsl_otg_dev);
1200 iounmap((void *)usb_dr_regs);
1202 fsl_otg_uninit_timers();
1203 kfree(fsl_otg_dev->phy.otg);
1206 device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
1208 unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
1216 struct platform_driver fsl_otg_driver = {
1217 .probe = fsl_otg_probe,
1218 .remove = fsl_otg_remove,
1220 .name = driver_name,
1221 .owner = THIS_MODULE,
1225 module_platform_driver(fsl_otg_driver);
1227 MODULE_DESCRIPTION(DRIVER_INFO);
1228 MODULE_AUTHOR(DRIVER_AUTHOR);
1229 MODULE_LICENSE("GPL");