2 * Texas Instruments DSPS platforms "glue layer"
4 * Copyright (C) 2012, by Texas Instruments
6 * Based on the am35x "glue layer" code.
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
26 * musb_dsps.c will be a common file for all the TI DSPS platforms
27 * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
28 * For now only ti81x is using this and in future davinci.c, am35x.c
29 * da8xx.c would be merged to this file after testing.
33 #include <linux/err.h>
34 #include <linux/platform_device.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/module.h>
38 #include <linux/usb/usb_phy_generic.h>
39 #include <linux/platform_data/usb-omap.h>
40 #include <linux/sizes.h>
43 #include <linux/of_device.h>
44 #include <linux/of_address.h>
45 #include <linux/of_irq.h>
46 #include <linux/usb/of.h>
48 #include <linux/debugfs.h>
50 #include "musb_core.h"
52 static const struct of_device_id musb_dsps_of_match
[];
55 * avoid using musb_readx()/musb_writex() as glue layer should not be
56 * dependent on musb core layer symbols.
58 static inline u8
dsps_readb(const void __iomem
*addr
, unsigned offset
)
60 return __raw_readb(addr
+ offset
);
63 static inline u32
dsps_readl(const void __iomem
*addr
, unsigned offset
)
65 return __raw_readl(addr
+ offset
);
68 static inline void dsps_writeb(void __iomem
*addr
, unsigned offset
, u8 data
)
70 __raw_writeb(data
, addr
+ offset
);
73 static inline void dsps_writel(void __iomem
*addr
, unsigned offset
, u32 data
)
75 __raw_writel(data
, addr
+ offset
);
79 * DSPS musb wrapper register offset.
80 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
83 struct dsps_musb_wrapper
{
98 /* bit positions for control */
101 /* bit positions for interrupt */
102 unsigned usb_shift
:5;
107 unsigned txep_shift
:5;
111 unsigned rxep_shift
:5;
115 /* bit positions for phy_utmi */
116 unsigned otg_disable
:5;
118 /* bit positions for mode */
120 unsigned iddig_mux
:5;
121 /* miscellaneous stuff */
126 * register shadow for suspend
128 struct dsps_context
{
139 * DSPS glue structure.
143 struct platform_device
*musb
; /* child musb pdev */
144 const struct dsps_musb_wrapper
*wrp
; /* wrapper register offsets */
145 struct timer_list timer
; /* otg_workaround timer */
146 unsigned long last_timer
; /* last timer data for each instance */
147 bool sw_babble_enabled
;
149 struct dsps_context context
;
150 struct debugfs_regset32 regset
;
151 struct dentry
*dbgfs_root
;
154 static const struct debugfs_reg32 dsps_musb_regs
[] = {
155 { "revision", 0x00 },
159 { "intr0_stat", 0x30 },
160 { "intr1_stat", 0x34 },
161 { "intr0_set", 0x38 },
162 { "intr1_set", 0x3c },
166 { "srpfixtime", 0xd4 },
168 { "phy_utmi", 0xe0 },
172 static void dsps_musb_try_idle(struct musb
*musb
, unsigned long timeout
)
174 struct device
*dev
= musb
->controller
;
175 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
178 timeout
= jiffies
+ msecs_to_jiffies(3);
180 /* Never idle if active, or when VBUS timeout is not set as host */
181 if (musb
->is_active
|| (musb
->a_wait_bcon
== 0 &&
182 musb
->xceiv
->otg
->state
== OTG_STATE_A_WAIT_BCON
)) {
183 dev_dbg(musb
->controller
, "%s active, deleting timer\n",
184 usb_otg_state_string(musb
->xceiv
->otg
->state
));
185 del_timer(&glue
->timer
);
186 glue
->last_timer
= jiffies
;
189 if (musb
->port_mode
!= MUSB_PORT_MODE_DUAL_ROLE
)
192 if (!musb
->g
.dev
.driver
)
195 if (time_after(glue
->last_timer
, timeout
) &&
196 timer_pending(&glue
->timer
)) {
197 dev_dbg(musb
->controller
,
198 "Longer idle timer already pending, ignoring...\n");
201 glue
->last_timer
= timeout
;
203 dev_dbg(musb
->controller
, "%s inactive, starting idle timer for %u ms\n",
204 usb_otg_state_string(musb
->xceiv
->otg
->state
),
205 jiffies_to_msecs(timeout
- jiffies
));
206 mod_timer(&glue
->timer
, timeout
);
210 * dsps_musb_enable - enable interrupts
212 static void dsps_musb_enable(struct musb
*musb
)
214 struct device
*dev
= musb
->controller
;
215 struct platform_device
*pdev
= to_platform_device(dev
->parent
);
216 struct dsps_glue
*glue
= platform_get_drvdata(pdev
);
217 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
218 void __iomem
*reg_base
= musb
->ctrl_base
;
219 u32 epmask
, coremask
;
221 /* Workaround: setup IRQs through both register sets. */
222 epmask
= ((musb
->epmask
& wrp
->txep_mask
) << wrp
->txep_shift
) |
223 ((musb
->epmask
& wrp
->rxep_mask
) << wrp
->rxep_shift
);
224 coremask
= (wrp
->usb_bitmap
& ~MUSB_INTR_SOF
);
226 dsps_writel(reg_base
, wrp
->epintr_set
, epmask
);
227 dsps_writel(reg_base
, wrp
->coreintr_set
, coremask
);
228 /* Force the DRVVBUS IRQ so we can start polling for ID change. */
229 dsps_writel(reg_base
, wrp
->coreintr_set
,
230 (1 << wrp
->drvvbus
) << wrp
->usb_shift
);
231 dsps_musb_try_idle(musb
, 0);
235 * dsps_musb_disable - disable HDRC and flush interrupts
237 static void dsps_musb_disable(struct musb
*musb
)
239 struct device
*dev
= musb
->controller
;
240 struct platform_device
*pdev
= to_platform_device(dev
->parent
);
241 struct dsps_glue
*glue
= platform_get_drvdata(pdev
);
242 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
243 void __iomem
*reg_base
= musb
->ctrl_base
;
245 dsps_writel(reg_base
, wrp
->coreintr_clear
, wrp
->usb_bitmap
);
246 dsps_writel(reg_base
, wrp
->epintr_clear
,
247 wrp
->txep_bitmap
| wrp
->rxep_bitmap
);
248 dsps_writeb(musb
->mregs
, MUSB_DEVCTL
, 0);
251 static void otg_timer(unsigned long _musb
)
253 struct musb
*musb
= (void *)_musb
;
254 void __iomem
*mregs
= musb
->mregs
;
255 struct device
*dev
= musb
->controller
;
256 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
257 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
260 int skip_session
= 0;
263 * We poll because DSPS IP's won't expose several OTG-critical
264 * status change events (from the transceiver) otherwise.
266 devctl
= dsps_readb(mregs
, MUSB_DEVCTL
);
267 dev_dbg(musb
->controller
, "Poll devctl %02x (%s)\n", devctl
,
268 usb_otg_state_string(musb
->xceiv
->otg
->state
));
270 spin_lock_irqsave(&musb
->lock
, flags
);
271 switch (musb
->xceiv
->otg
->state
) {
272 case OTG_STATE_A_WAIT_BCON
:
273 dsps_writeb(musb
->mregs
, MUSB_DEVCTL
, 0);
277 case OTG_STATE_A_IDLE
:
278 case OTG_STATE_B_IDLE
:
279 if (devctl
& MUSB_DEVCTL_BDEVICE
) {
280 musb
->xceiv
->otg
->state
= OTG_STATE_B_IDLE
;
283 musb
->xceiv
->otg
->state
= OTG_STATE_A_IDLE
;
286 if (!(devctl
& MUSB_DEVCTL_SESSION
) && !skip_session
)
287 dsps_writeb(mregs
, MUSB_DEVCTL
, MUSB_DEVCTL_SESSION
);
288 mod_timer(&glue
->timer
, jiffies
+ wrp
->poll_seconds
* HZ
);
290 case OTG_STATE_A_WAIT_VFALL
:
291 musb
->xceiv
->otg
->state
= OTG_STATE_A_WAIT_VRISE
;
292 dsps_writel(musb
->ctrl_base
, wrp
->coreintr_set
,
293 MUSB_INTR_VBUSERROR
<< wrp
->usb_shift
);
298 spin_unlock_irqrestore(&musb
->lock
, flags
);
301 static irqreturn_t
dsps_interrupt(int irq
, void *hci
)
303 struct musb
*musb
= hci
;
304 void __iomem
*reg_base
= musb
->ctrl_base
;
305 struct device
*dev
= musb
->controller
;
306 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
307 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
309 irqreturn_t ret
= IRQ_NONE
;
312 spin_lock_irqsave(&musb
->lock
, flags
);
314 /* Get endpoint interrupts */
315 epintr
= dsps_readl(reg_base
, wrp
->epintr_status
);
316 musb
->int_rx
= (epintr
& wrp
->rxep_bitmap
) >> wrp
->rxep_shift
;
317 musb
->int_tx
= (epintr
& wrp
->txep_bitmap
) >> wrp
->txep_shift
;
320 dsps_writel(reg_base
, wrp
->epintr_status
, epintr
);
322 /* Get usb core interrupts */
323 usbintr
= dsps_readl(reg_base
, wrp
->coreintr_status
);
324 if (!usbintr
&& !epintr
)
327 musb
->int_usb
= (usbintr
& wrp
->usb_bitmap
) >> wrp
->usb_shift
;
329 dsps_writel(reg_base
, wrp
->coreintr_status
, usbintr
);
331 dev_dbg(musb
->controller
, "usbintr (%x) epintr(%x)\n",
334 * DRVVBUS IRQs are the only proxy we have (a very poor one!) for
335 * DSPS IP's missing ID change IRQ. We need an ID change IRQ to
336 * switch appropriately between halves of the OTG state machine.
337 * Managing DEVCTL.SESSION per Mentor docs requires that we know its
338 * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set.
339 * Also, DRVVBUS pulses for SRP (but not at 5V) ...
341 if (is_host_active(musb
) && usbintr
& MUSB_INTR_BABBLE
) {
342 pr_info("CAUTION: musb: Babble Interrupt Occurred\n");
345 * When a babble condition occurs, the musb controller removes
346 * the session and is no longer in host mode. Hence, all
347 * devices connected to its root hub get disconnected.
349 * Hand this error down to the musb core isr, so it can
352 musb
->int_usb
= MUSB_INTR_BABBLE
| MUSB_INTR_DISCONNECT
;
353 musb
->int_tx
= musb
->int_rx
= 0;
356 if (usbintr
& ((1 << wrp
->drvvbus
) << wrp
->usb_shift
)) {
357 int drvvbus
= dsps_readl(reg_base
, wrp
->status
);
358 void __iomem
*mregs
= musb
->mregs
;
359 u8 devctl
= dsps_readb(mregs
, MUSB_DEVCTL
);
362 err
= musb
->int_usb
& MUSB_INTR_VBUSERROR
;
365 * The Mentor core doesn't debounce VBUS as needed
366 * to cope with device connect current spikes. This
367 * means it's not uncommon for bus-powered devices
368 * to get VBUS errors during enumeration.
370 * This is a workaround, but newer RTL from Mentor
371 * seems to allow a better one: "re"-starting sessions
372 * without waiting for VBUS to stop registering in
375 musb
->int_usb
&= ~MUSB_INTR_VBUSERROR
;
376 musb
->xceiv
->otg
->state
= OTG_STATE_A_WAIT_VFALL
;
377 mod_timer(&glue
->timer
,
378 jiffies
+ wrp
->poll_seconds
* HZ
);
379 WARNING("VBUS error workaround (delay coming)\n");
380 } else if (drvvbus
) {
382 musb
->xceiv
->otg
->default_a
= 1;
383 musb
->xceiv
->otg
->state
= OTG_STATE_A_WAIT_VRISE
;
384 del_timer(&glue
->timer
);
388 musb
->xceiv
->otg
->default_a
= 0;
389 musb
->xceiv
->otg
->state
= OTG_STATE_B_IDLE
;
392 /* NOTE: this must complete power-on within 100 ms. */
393 dev_dbg(musb
->controller
, "VBUS %s (%s)%s, devctl %02x\n",
394 drvvbus
? "on" : "off",
395 usb_otg_state_string(musb
->xceiv
->otg
->state
),
401 if (musb
->int_tx
|| musb
->int_rx
|| musb
->int_usb
)
402 ret
|= musb_interrupt(musb
);
404 /* Poll for ID change in OTG port mode */
405 if (musb
->xceiv
->otg
->state
== OTG_STATE_B_IDLE
&&
406 musb
->port_mode
== MUSB_PORT_MODE_DUAL_ROLE
)
407 mod_timer(&glue
->timer
, jiffies
+ wrp
->poll_seconds
* HZ
);
409 spin_unlock_irqrestore(&musb
->lock
, flags
);
414 static int dsps_musb_dbg_init(struct musb
*musb
, struct dsps_glue
*glue
)
420 sprintf(buf
, "%s.dsps", dev_name(musb
->controller
));
421 root
= debugfs_create_dir(buf
, NULL
);
424 glue
->dbgfs_root
= root
;
426 glue
->regset
.regs
= dsps_musb_regs
;
427 glue
->regset
.nregs
= ARRAY_SIZE(dsps_musb_regs
);
428 glue
->regset
.base
= musb
->ctrl_base
;
430 file
= debugfs_create_regset32("regdump", S_IRUGO
, root
, &glue
->regset
);
432 debugfs_remove_recursive(root
);
438 static int dsps_musb_init(struct musb
*musb
)
440 struct device
*dev
= musb
->controller
;
441 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
442 struct platform_device
*parent
= to_platform_device(dev
->parent
);
443 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
444 void __iomem
*reg_base
;
449 r
= platform_get_resource_byname(parent
, IORESOURCE_MEM
, "control");
450 reg_base
= devm_ioremap_resource(dev
, r
);
451 if (IS_ERR(reg_base
))
452 return PTR_ERR(reg_base
);
453 musb
->ctrl_base
= reg_base
;
455 /* NOP driver needs change if supporting dual instance */
456 musb
->xceiv
= devm_usb_get_phy_by_phandle(dev
, "phys", 0);
457 if (IS_ERR(musb
->xceiv
))
458 return PTR_ERR(musb
->xceiv
);
460 /* Returns zero if e.g. not clocked */
461 rev
= dsps_readl(reg_base
, wrp
->revision
);
465 usb_phy_init(musb
->xceiv
);
466 setup_timer(&glue
->timer
, otg_timer
, (unsigned long) musb
);
469 dsps_writel(reg_base
, wrp
->control
, (1 << wrp
->reset
));
471 musb
->isr
= dsps_interrupt
;
473 /* reset the otgdisable bit, needed for host mode to work */
474 val
= dsps_readl(reg_base
, wrp
->phy_utmi
);
475 val
&= ~(1 << wrp
->otg_disable
);
476 dsps_writel(musb
->ctrl_base
, wrp
->phy_utmi
, val
);
479 * Check whether the dsps version has babble control enabled.
480 * In latest silicon revision the babble control logic is enabled.
481 * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
484 val
= dsps_readb(musb
->mregs
, MUSB_BABBLE_CTL
);
485 if (val
== MUSB_BABBLE_RCV_DISABLE
) {
486 glue
->sw_babble_enabled
= true;
487 val
|= MUSB_BABBLE_SW_SESSION_CTRL
;
488 dsps_writeb(musb
->mregs
, MUSB_BABBLE_CTL
, val
);
491 ret
= dsps_musb_dbg_init(musb
, glue
);
498 static int dsps_musb_exit(struct musb
*musb
)
500 struct device
*dev
= musb
->controller
;
501 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
503 del_timer_sync(&glue
->timer
);
504 usb_phy_shutdown(musb
->xceiv
);
505 debugfs_remove_recursive(glue
->dbgfs_root
);
510 static int dsps_musb_set_mode(struct musb
*musb
, u8 mode
)
512 struct device
*dev
= musb
->controller
;
513 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
514 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
515 void __iomem
*ctrl_base
= musb
->ctrl_base
;
518 reg
= dsps_readl(ctrl_base
, wrp
->mode
);
522 reg
&= ~(1 << wrp
->iddig
);
525 * if we're setting mode to host-only or device-only, we're
526 * going to ignore whatever the PHY sends us and just force
527 * ID pin status by SW
529 reg
|= (1 << wrp
->iddig_mux
);
531 dsps_writel(ctrl_base
, wrp
->mode
, reg
);
532 dsps_writel(ctrl_base
, wrp
->phy_utmi
, 0x02);
534 case MUSB_PERIPHERAL
:
535 reg
|= (1 << wrp
->iddig
);
538 * if we're setting mode to host-only or device-only, we're
539 * going to ignore whatever the PHY sends us and just force
540 * ID pin status by SW
542 reg
|= (1 << wrp
->iddig_mux
);
544 dsps_writel(ctrl_base
, wrp
->mode
, reg
);
547 dsps_writel(ctrl_base
, wrp
->phy_utmi
, 0x02);
550 dev_err(glue
->dev
, "unsupported mode %d\n", mode
);
557 static bool sw_babble_control(struct musb
*musb
)
560 bool session_restart
= false;
562 babble_ctl
= dsps_readb(musb
->mregs
, MUSB_BABBLE_CTL
);
563 dev_dbg(musb
->controller
, "babble: MUSB_BABBLE_CTL value %x\n",
566 * check line monitor flag to check whether babble is
569 dev_dbg(musb
->controller
, "STUCK_J is %s\n",
570 babble_ctl
& MUSB_BABBLE_STUCK_J
? "set" : "reset");
572 if (babble_ctl
& MUSB_BABBLE_STUCK_J
) {
576 * babble is due to noise, then set transmit idle (d7 bit)
577 * to resume normal operation
579 babble_ctl
= dsps_readb(musb
->mregs
, MUSB_BABBLE_CTL
);
580 babble_ctl
|= MUSB_BABBLE_FORCE_TXIDLE
;
581 dsps_writeb(musb
->mregs
, MUSB_BABBLE_CTL
, babble_ctl
);
583 /* wait till line monitor flag cleared */
584 dev_dbg(musb
->controller
, "Set TXIDLE, wait J to clear\n");
586 babble_ctl
= dsps_readb(musb
->mregs
, MUSB_BABBLE_CTL
);
588 } while ((babble_ctl
& MUSB_BABBLE_STUCK_J
) && timeout
--);
590 /* check whether stuck_at_j bit cleared */
591 if (babble_ctl
& MUSB_BABBLE_STUCK_J
) {
593 * real babble condition has occurred
594 * restart the controller to start the
597 dev_dbg(musb
->controller
, "J not cleared, misc (%x)\n",
599 session_restart
= true;
602 session_restart
= true;
605 return session_restart
;
608 static int dsps_musb_reset(struct musb
*musb
)
610 struct device
*dev
= musb
->controller
;
611 struct dsps_glue
*glue
= dev_get_drvdata(dev
->parent
);
612 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
613 int session_restart
= 0;
615 if (glue
->sw_babble_enabled
)
616 session_restart
= sw_babble_control(musb
);
618 * In case of new silicon version babble condition can be recovered
619 * without resetting the MUSB. But for older silicon versions, MUSB
622 if (session_restart
|| !glue
->sw_babble_enabled
) {
623 dev_info(musb
->controller
, "Restarting MUSB to recover from Babble\n");
624 dsps_writel(musb
->ctrl_base
, wrp
->control
, (1 << wrp
->reset
));
625 usleep_range(100, 200);
626 usb_phy_shutdown(musb
->xceiv
);
627 usleep_range(100, 200);
628 usb_phy_init(musb
->xceiv
);
632 return !session_restart
;
635 static struct musb_platform_ops dsps_ops
= {
636 .init
= dsps_musb_init
,
637 .exit
= dsps_musb_exit
,
639 .enable
= dsps_musb_enable
,
640 .disable
= dsps_musb_disable
,
642 .try_idle
= dsps_musb_try_idle
,
643 .set_mode
= dsps_musb_set_mode
,
644 .reset
= dsps_musb_reset
,
647 static u64 musb_dmamask
= DMA_BIT_MASK(32);
649 static int get_int_prop(struct device_node
*dn
, const char *s
)
654 ret
= of_property_read_u32(dn
, s
, &val
);
660 static int get_musb_port_mode(struct device
*dev
)
662 enum usb_dr_mode mode
;
664 mode
= of_usb_get_dr_mode(dev
->of_node
);
666 case USB_DR_MODE_HOST
:
667 return MUSB_PORT_MODE_HOST
;
669 case USB_DR_MODE_PERIPHERAL
:
670 return MUSB_PORT_MODE_GADGET
;
672 case USB_DR_MODE_UNKNOWN
:
673 case USB_DR_MODE_OTG
:
675 return MUSB_PORT_MODE_DUAL_ROLE
;
679 static int dsps_create_musb_pdev(struct dsps_glue
*glue
,
680 struct platform_device
*parent
)
682 struct musb_hdrc_platform_data pdata
;
683 struct resource resources
[2];
684 struct resource
*res
;
685 struct device
*dev
= &parent
->dev
;
686 struct musb_hdrc_config
*config
;
687 struct platform_device
*musb
;
688 struct device_node
*dn
= parent
->dev
.of_node
;
691 memset(resources
, 0, sizeof(resources
));
692 res
= platform_get_resource_byname(parent
, IORESOURCE_MEM
, "mc");
694 dev_err(dev
, "failed to get memory.\n");
699 res
= platform_get_resource_byname(parent
, IORESOURCE_IRQ
, "mc");
701 dev_err(dev
, "failed to get irq.\n");
706 /* allocate the child platform device */
707 musb
= platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO
);
709 dev_err(dev
, "failed to allocate musb device\n");
713 musb
->dev
.parent
= dev
;
714 musb
->dev
.dma_mask
= &musb_dmamask
;
715 musb
->dev
.coherent_dma_mask
= musb_dmamask
;
716 musb
->dev
.of_node
= of_node_get(dn
);
720 ret
= platform_device_add_resources(musb
, resources
,
721 ARRAY_SIZE(resources
));
723 dev_err(dev
, "failed to add resources\n");
727 config
= devm_kzalloc(&parent
->dev
, sizeof(*config
), GFP_KERNEL
);
732 pdata
.config
= config
;
733 pdata
.platform_ops
= &dsps_ops
;
735 config
->num_eps
= get_int_prop(dn
, "mentor,num-eps");
736 config
->ram_bits
= get_int_prop(dn
, "mentor,ram-bits");
737 config
->host_port_deassert_reset_at_resume
= 1;
738 pdata
.mode
= get_musb_port_mode(dev
);
739 /* DT keeps this entry in mA, musb expects it as per USB spec */
740 pdata
.power
= get_int_prop(dn
, "mentor,power") / 2;
741 config
->multipoint
= of_property_read_bool(dn
, "mentor,multipoint");
743 ret
= platform_device_add_data(musb
, &pdata
, sizeof(pdata
));
745 dev_err(dev
, "failed to add platform_data\n");
749 ret
= platform_device_add(musb
);
751 dev_err(dev
, "failed to register musb device\n");
757 platform_device_put(musb
);
761 static int dsps_probe(struct platform_device
*pdev
)
763 const struct of_device_id
*match
;
764 const struct dsps_musb_wrapper
*wrp
;
765 struct dsps_glue
*glue
;
768 if (!strcmp(pdev
->name
, "musb-hdrc"))
771 match
= of_match_node(musb_dsps_of_match
, pdev
->dev
.of_node
);
773 dev_err(&pdev
->dev
, "fail to get matching of_match struct\n");
779 glue
= devm_kzalloc(&pdev
->dev
, sizeof(*glue
), GFP_KERNEL
);
783 glue
->dev
= &pdev
->dev
;
786 platform_set_drvdata(pdev
, glue
);
787 pm_runtime_enable(&pdev
->dev
);
789 ret
= pm_runtime_get_sync(&pdev
->dev
);
791 dev_err(&pdev
->dev
, "pm_runtime_get_sync FAILED");
795 ret
= dsps_create_musb_pdev(glue
, pdev
);
802 pm_runtime_put(&pdev
->dev
);
804 pm_runtime_disable(&pdev
->dev
);
808 static int dsps_remove(struct platform_device
*pdev
)
810 struct dsps_glue
*glue
= platform_get_drvdata(pdev
);
812 platform_device_unregister(glue
->musb
);
814 /* disable usbss clocks */
815 pm_runtime_put(&pdev
->dev
);
816 pm_runtime_disable(&pdev
->dev
);
821 static const struct dsps_musb_wrapper am33xx_driver_data
= {
826 .epintr_clear
= 0x40,
827 .epintr_status
= 0x30,
828 .coreintr_set
= 0x3c,
829 .coreintr_clear
= 0x44,
830 .coreintr_status
= 0x34,
841 .usb_bitmap
= (0x1ff << 0),
845 .txep_bitmap
= (0xffff << 0),
848 .rxep_bitmap
= (0xfffe << 16),
852 static const struct of_device_id musb_dsps_of_match
[] = {
853 { .compatible
= "ti,musb-am33xx",
854 .data
= (void *) &am33xx_driver_data
, },
857 MODULE_DEVICE_TABLE(of
, musb_dsps_of_match
);
859 #ifdef CONFIG_PM_SLEEP
860 static int dsps_suspend(struct device
*dev
)
862 struct dsps_glue
*glue
= dev_get_drvdata(dev
);
863 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
864 struct musb
*musb
= platform_get_drvdata(glue
->musb
);
867 del_timer_sync(&glue
->timer
);
870 /* This can happen if the musb device is in -EPROBE_DEFER */
873 mbase
= musb
->ctrl_base
;
874 glue
->context
.control
= dsps_readl(mbase
, wrp
->control
);
875 glue
->context
.epintr
= dsps_readl(mbase
, wrp
->epintr_set
);
876 glue
->context
.coreintr
= dsps_readl(mbase
, wrp
->coreintr_set
);
877 glue
->context
.phy_utmi
= dsps_readl(mbase
, wrp
->phy_utmi
);
878 glue
->context
.mode
= dsps_readl(mbase
, wrp
->mode
);
879 glue
->context
.tx_mode
= dsps_readl(mbase
, wrp
->tx_mode
);
880 glue
->context
.rx_mode
= dsps_readl(mbase
, wrp
->rx_mode
);
885 static int dsps_resume(struct device
*dev
)
887 struct dsps_glue
*glue
= dev_get_drvdata(dev
);
888 const struct dsps_musb_wrapper
*wrp
= glue
->wrp
;
889 struct musb
*musb
= platform_get_drvdata(glue
->musb
);
895 mbase
= musb
->ctrl_base
;
896 dsps_writel(mbase
, wrp
->control
, glue
->context
.control
);
897 dsps_writel(mbase
, wrp
->epintr_set
, glue
->context
.epintr
);
898 dsps_writel(mbase
, wrp
->coreintr_set
, glue
->context
.coreintr
);
899 dsps_writel(mbase
, wrp
->phy_utmi
, glue
->context
.phy_utmi
);
900 dsps_writel(mbase
, wrp
->mode
, glue
->context
.mode
);
901 dsps_writel(mbase
, wrp
->tx_mode
, glue
->context
.tx_mode
);
902 dsps_writel(mbase
, wrp
->rx_mode
, glue
->context
.rx_mode
);
903 if (musb
->xceiv
->otg
->state
== OTG_STATE_B_IDLE
&&
904 musb
->port_mode
== MUSB_PORT_MODE_DUAL_ROLE
)
905 mod_timer(&glue
->timer
, jiffies
+ wrp
->poll_seconds
* HZ
);
911 static SIMPLE_DEV_PM_OPS(dsps_pm_ops
, dsps_suspend
, dsps_resume
);
913 static struct platform_driver dsps_usbss_driver
= {
915 .remove
= dsps_remove
,
919 .of_match_table
= musb_dsps_of_match
,
923 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
924 MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
925 MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
926 MODULE_LICENSE("GPL v2");
928 module_platform_driver(dsps_usbss_driver
);