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 * DSPS musb wrapper register offset.
56 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
59 struct dsps_musb_wrapper {
74 /* bit positions for control */
77 /* bit positions for interrupt */
83 unsigned txep_shift:5;
87 unsigned rxep_shift:5;
91 /* bit positions for phy_utmi */
92 unsigned otg_disable:5;
94 /* bit positions for mode */
97 /* miscellaneous stuff */
98 unsigned poll_timeout;
102 * register shadow for suspend
104 struct dsps_context {
115 * DSPS glue structure.
119 struct platform_device *musb; /* child musb pdev */
120 const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
121 struct timer_list timer; /* otg_workaround timer */
122 unsigned long last_timer; /* last timer data for each instance */
123 bool sw_babble_enabled;
125 struct dsps_context context;
126 struct debugfs_regset32 regset;
127 struct dentry *dbgfs_root;
130 static const struct debugfs_reg32 dsps_musb_regs[] = {
131 { "revision", 0x00 },
135 { "intr0_stat", 0x30 },
136 { "intr1_stat", 0x34 },
137 { "intr0_set", 0x38 },
138 { "intr1_set", 0x3c },
142 { "srpfixtime", 0xd4 },
144 { "phy_utmi", 0xe0 },
149 * dsps_musb_enable - enable interrupts
151 static void dsps_musb_enable(struct musb *musb)
153 struct device *dev = musb->controller;
154 struct platform_device *pdev = to_platform_device(dev->parent);
155 struct dsps_glue *glue = platform_get_drvdata(pdev);
156 const struct dsps_musb_wrapper *wrp = glue->wrp;
157 void __iomem *reg_base = musb->ctrl_base;
158 u32 epmask, coremask;
160 /* Workaround: setup IRQs through both register sets. */
161 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
162 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
163 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
165 musb_writel(reg_base, wrp->epintr_set, epmask);
166 musb_writel(reg_base, wrp->coreintr_set, coremask);
167 /* start polling for ID change in dual-role idle mode */
168 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
169 musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
170 mod_timer(&glue->timer, jiffies +
171 msecs_to_jiffies(wrp->poll_timeout));
175 * dsps_musb_disable - disable HDRC and flush interrupts
177 static void dsps_musb_disable(struct musb *musb)
179 struct device *dev = musb->controller;
180 struct platform_device *pdev = to_platform_device(dev->parent);
181 struct dsps_glue *glue = platform_get_drvdata(pdev);
182 const struct dsps_musb_wrapper *wrp = glue->wrp;
183 void __iomem *reg_base = musb->ctrl_base;
185 musb_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
186 musb_writel(reg_base, wrp->epintr_clear,
187 wrp->txep_bitmap | wrp->rxep_bitmap);
188 del_timer_sync(&glue->timer);
189 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
192 /* Caller must take musb->lock */
193 static int dsps_check_status(struct musb *musb, void *unused)
195 void __iomem *mregs = musb->mregs;
196 struct device *dev = musb->controller;
197 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
198 const struct dsps_musb_wrapper *wrp = glue->wrp;
200 int skip_session = 0;
203 * We poll because DSPS IP's won't expose several OTG-critical
204 * status change events (from the transceiver) otherwise.
206 devctl = musb_readb(mregs, MUSB_DEVCTL);
207 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
208 usb_otg_state_string(musb->xceiv->otg->state));
210 switch (musb->xceiv->otg->state) {
211 case OTG_STATE_A_WAIT_VRISE:
212 mod_timer(&glue->timer, jiffies +
213 msecs_to_jiffies(wrp->poll_timeout));
215 case OTG_STATE_A_WAIT_BCON:
216 /* keep VBUS on for host-only mode */
217 if (musb->port_mode == MUSB_PORT_MODE_HOST) {
218 mod_timer(&glue->timer, jiffies +
219 msecs_to_jiffies(wrp->poll_timeout));
222 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
226 case OTG_STATE_A_IDLE:
227 case OTG_STATE_B_IDLE:
228 if (devctl & MUSB_DEVCTL_BDEVICE) {
229 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
232 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
235 if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
236 musb_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
237 mod_timer(&glue->timer, jiffies +
238 msecs_to_jiffies(wrp->poll_timeout));
240 case OTG_STATE_A_WAIT_VFALL:
241 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
242 musb_writel(musb->ctrl_base, wrp->coreintr_set,
243 MUSB_INTR_VBUSERROR << wrp->usb_shift);
252 static void otg_timer(unsigned long _musb)
254 struct musb *musb = (void *)_musb;
255 struct device *dev = musb->controller;
259 err = pm_runtime_get(dev);
260 if ((err != -EINPROGRESS) && err < 0) {
261 dev_err(dev, "Poll could not pm_runtime_get: %i\n", err);
262 pm_runtime_put_noidle(dev);
267 spin_lock_irqsave(&musb->lock, flags);
268 err = musb_queue_resume_work(musb, dsps_check_status, NULL);
270 dev_err(dev, "%s resume work: %i\n", __func__, err);
271 spin_unlock_irqrestore(&musb->lock, flags);
272 pm_runtime_mark_last_busy(dev);
273 pm_runtime_put_autosuspend(dev);
276 void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
279 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
280 const struct dsps_musb_wrapper *wrp = glue->wrp;
282 /* musb->lock might already been held */
283 epintr = (1 << epnum) << wrp->rxep_shift;
284 musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
287 static irqreturn_t dsps_interrupt(int irq, void *hci)
289 struct musb *musb = hci;
290 void __iomem *reg_base = musb->ctrl_base;
291 struct device *dev = musb->controller;
292 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
293 const struct dsps_musb_wrapper *wrp = glue->wrp;
295 irqreturn_t ret = IRQ_NONE;
298 spin_lock_irqsave(&musb->lock, flags);
300 /* Get endpoint interrupts */
301 epintr = musb_readl(reg_base, wrp->epintr_status);
302 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
303 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
306 musb_writel(reg_base, wrp->epintr_status, epintr);
308 /* Get usb core interrupts */
309 usbintr = musb_readl(reg_base, wrp->coreintr_status);
310 if (!usbintr && !epintr)
313 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
315 musb_writel(reg_base, wrp->coreintr_status, usbintr);
317 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
320 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
321 int drvvbus = musb_readl(reg_base, wrp->status);
322 void __iomem *mregs = musb->mregs;
323 u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
326 err = musb->int_usb & MUSB_INTR_VBUSERROR;
329 * The Mentor core doesn't debounce VBUS as needed
330 * to cope with device connect current spikes. This
331 * means it's not uncommon for bus-powered devices
332 * to get VBUS errors during enumeration.
334 * This is a workaround, but newer RTL from Mentor
335 * seems to allow a better one: "re"-starting sessions
336 * without waiting for VBUS to stop registering in
339 musb->int_usb &= ~MUSB_INTR_VBUSERROR;
340 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
341 mod_timer(&glue->timer, jiffies +
342 msecs_to_jiffies(wrp->poll_timeout));
343 WARNING("VBUS error workaround (delay coming)\n");
344 } else if (drvvbus) {
346 musb->xceiv->otg->default_a = 1;
347 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
348 mod_timer(&glue->timer, jiffies +
349 msecs_to_jiffies(wrp->poll_timeout));
353 musb->xceiv->otg->default_a = 0;
354 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
357 /* NOTE: this must complete power-on within 100 ms. */
358 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
359 drvvbus ? "on" : "off",
360 usb_otg_state_string(musb->xceiv->otg->state),
366 if (musb->int_tx || musb->int_rx || musb->int_usb)
367 ret |= musb_interrupt(musb);
369 /* Poll for ID change and connect */
370 switch (musb->xceiv->otg->state) {
371 case OTG_STATE_B_IDLE:
372 case OTG_STATE_A_WAIT_BCON:
373 mod_timer(&glue->timer, jiffies +
374 msecs_to_jiffies(wrp->poll_timeout));
381 spin_unlock_irqrestore(&musb->lock, flags);
386 static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
392 sprintf(buf, "%s.dsps", dev_name(musb->controller));
393 root = debugfs_create_dir(buf, NULL);
396 glue->dbgfs_root = root;
398 glue->regset.regs = dsps_musb_regs;
399 glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
400 glue->regset.base = musb->ctrl_base;
402 file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
404 debugfs_remove_recursive(root);
410 static int dsps_musb_init(struct musb *musb)
412 struct device *dev = musb->controller;
413 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
414 struct platform_device *parent = to_platform_device(dev->parent);
415 const struct dsps_musb_wrapper *wrp = glue->wrp;
416 void __iomem *reg_base;
421 r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
422 reg_base = devm_ioremap_resource(dev, r);
423 if (IS_ERR(reg_base))
424 return PTR_ERR(reg_base);
425 musb->ctrl_base = reg_base;
427 /* NOP driver needs change if supporting dual instance */
428 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
429 if (IS_ERR(musb->xceiv))
430 return PTR_ERR(musb->xceiv);
432 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
434 /* Returns zero if e.g. not clocked */
435 rev = musb_readl(reg_base, wrp->revision);
439 usb_phy_init(musb->xceiv);
440 if (IS_ERR(musb->phy)) {
443 ret = phy_init(musb->phy);
446 ret = phy_power_on(musb->phy);
453 setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
456 musb_writel(reg_base, wrp->control, (1 << wrp->reset));
458 musb->isr = dsps_interrupt;
460 /* reset the otgdisable bit, needed for host mode to work */
461 val = musb_readl(reg_base, wrp->phy_utmi);
462 val &= ~(1 << wrp->otg_disable);
463 musb_writel(musb->ctrl_base, wrp->phy_utmi, val);
466 * Check whether the dsps version has babble control enabled.
467 * In latest silicon revision the babble control logic is enabled.
468 * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
471 val = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
472 if (val & MUSB_BABBLE_RCV_DISABLE) {
473 glue->sw_babble_enabled = true;
474 val |= MUSB_BABBLE_SW_SESSION_CTRL;
475 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
478 mod_timer(&glue->timer, jiffies +
479 msecs_to_jiffies(glue->wrp->poll_timeout));
481 return dsps_musb_dbg_init(musb, glue);
484 static int dsps_musb_exit(struct musb *musb)
486 struct device *dev = musb->controller;
487 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
489 del_timer_sync(&glue->timer);
490 usb_phy_shutdown(musb->xceiv);
491 phy_power_off(musb->phy);
493 debugfs_remove_recursive(glue->dbgfs_root);
498 static int dsps_musb_set_mode(struct musb *musb, u8 mode)
500 struct device *dev = musb->controller;
501 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
502 const struct dsps_musb_wrapper *wrp = glue->wrp;
503 void __iomem *ctrl_base = musb->ctrl_base;
506 reg = musb_readl(ctrl_base, wrp->mode);
510 reg &= ~(1 << wrp->iddig);
513 * if we're setting mode to host-only or device-only, we're
514 * going to ignore whatever the PHY sends us and just force
515 * ID pin status by SW
517 reg |= (1 << wrp->iddig_mux);
519 musb_writel(ctrl_base, wrp->mode, reg);
520 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
522 case MUSB_PERIPHERAL:
523 reg |= (1 << wrp->iddig);
526 * if we're setting mode to host-only or device-only, we're
527 * going to ignore whatever the PHY sends us and just force
528 * ID pin status by SW
530 reg |= (1 << wrp->iddig_mux);
532 musb_writel(ctrl_base, wrp->mode, reg);
535 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
538 dev_err(glue->dev, "unsupported mode %d\n", mode);
545 static bool dsps_sw_babble_control(struct musb *musb)
548 bool session_restart = false;
550 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
551 dev_dbg(musb->controller, "babble: MUSB_BABBLE_CTL value %x\n",
554 * check line monitor flag to check whether babble is
557 dev_dbg(musb->controller, "STUCK_J is %s\n",
558 babble_ctl & MUSB_BABBLE_STUCK_J ? "set" : "reset");
560 if (babble_ctl & MUSB_BABBLE_STUCK_J) {
564 * babble is due to noise, then set transmit idle (d7 bit)
565 * to resume normal operation
567 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
568 babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE;
569 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, babble_ctl);
571 /* wait till line monitor flag cleared */
572 dev_dbg(musb->controller, "Set TXIDLE, wait J to clear\n");
574 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
576 } while ((babble_ctl & MUSB_BABBLE_STUCK_J) && timeout--);
578 /* check whether stuck_at_j bit cleared */
579 if (babble_ctl & MUSB_BABBLE_STUCK_J) {
581 * real babble condition has occurred
582 * restart the controller to start the
585 dev_dbg(musb->controller, "J not cleared, misc (%x)\n",
587 session_restart = true;
590 session_restart = true;
593 return session_restart;
596 static int dsps_musb_recover(struct musb *musb)
598 struct device *dev = musb->controller;
599 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
600 int session_restart = 0;
602 if (glue->sw_babble_enabled)
603 session_restart = dsps_sw_babble_control(musb);
607 return session_restart ? 0 : -EPIPE;
610 /* Similar to am35x, dm81xx support only 32-bit read operation */
611 static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
613 void __iomem *fifo = hw_ep->fifo;
616 ioread32_rep(fifo, dst, len >> 2);
621 /* Read any remaining 1 to 3 bytes */
623 u32 val = musb_readl(fifo, 0);
624 memcpy(dst, &val, len);
628 static struct musb_platform_ops dsps_ops = {
629 .quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
630 .init = dsps_musb_init,
631 .exit = dsps_musb_exit,
633 #ifdef CONFIG_USB_TI_CPPI41_DMA
634 .dma_init = cppi41_dma_controller_create,
635 .dma_exit = cppi41_dma_controller_destroy,
637 .enable = dsps_musb_enable,
638 .disable = dsps_musb_disable,
640 .set_mode = dsps_musb_set_mode,
641 .recover = dsps_musb_recover,
642 .clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
645 static u64 musb_dmamask = DMA_BIT_MASK(32);
647 static int get_int_prop(struct device_node *dn, const char *s)
652 ret = of_property_read_u32(dn, s, &val);
658 static int get_musb_port_mode(struct device *dev)
660 enum usb_dr_mode mode;
662 mode = usb_get_dr_mode(dev);
664 case USB_DR_MODE_HOST:
665 return MUSB_PORT_MODE_HOST;
667 case USB_DR_MODE_PERIPHERAL:
668 return MUSB_PORT_MODE_GADGET;
670 case USB_DR_MODE_UNKNOWN:
671 case USB_DR_MODE_OTG:
673 return MUSB_PORT_MODE_DUAL_ROLE;
677 static int dsps_create_musb_pdev(struct dsps_glue *glue,
678 struct platform_device *parent)
680 struct musb_hdrc_platform_data pdata;
681 struct resource resources[2];
682 struct resource *res;
683 struct device *dev = &parent->dev;
684 struct musb_hdrc_config *config;
685 struct platform_device *musb;
686 struct device_node *dn = parent->dev.of_node;
689 memset(resources, 0, sizeof(resources));
690 res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
692 dev_err(dev, "failed to get memory.\n");
697 res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc");
699 dev_err(dev, "failed to get irq.\n");
704 /* allocate the child platform device */
705 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
707 dev_err(dev, "failed to allocate musb device\n");
711 musb->dev.parent = dev;
712 musb->dev.dma_mask = &musb_dmamask;
713 musb->dev.coherent_dma_mask = musb_dmamask;
717 ret = platform_device_add_resources(musb, resources,
718 ARRAY_SIZE(resources));
720 dev_err(dev, "failed to add resources\n");
724 config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
729 pdata.config = config;
730 pdata.platform_ops = &dsps_ops;
732 config->num_eps = get_int_prop(dn, "mentor,num-eps");
733 config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
734 config->host_port_deassert_reset_at_resume = 1;
735 pdata.mode = get_musb_port_mode(dev);
736 /* DT keeps this entry in mA, musb expects it as per USB spec */
737 pdata.power = get_int_prop(dn, "mentor,power") / 2;
739 ret = of_property_read_u32(dn, "mentor,multipoint", &val);
741 config->multipoint = true;
743 config->maximum_speed = usb_get_maximum_speed(&parent->dev);
744 switch (config->maximum_speed) {
748 case USB_SPEED_SUPER:
749 dev_warn(dev, "ignore incorrect maximum_speed "
750 "(super-speed) setting in dts");
753 config->maximum_speed = USB_SPEED_HIGH;
756 ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
758 dev_err(dev, "failed to add platform_data\n");
762 ret = platform_device_add(musb);
764 dev_err(dev, "failed to register musb device\n");
770 platform_device_put(musb);
774 static int dsps_probe(struct platform_device *pdev)
776 const struct of_device_id *match;
777 const struct dsps_musb_wrapper *wrp;
778 struct dsps_glue *glue;
781 if (!strcmp(pdev->name, "musb-hdrc"))
784 match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
786 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
791 if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
792 dsps_ops.read_fifo = dsps_read_fifo32;
795 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
799 glue->dev = &pdev->dev;
802 platform_set_drvdata(pdev, glue);
803 pm_runtime_enable(&pdev->dev);
804 ret = dsps_create_musb_pdev(glue, pdev);
811 pm_runtime_disable(&pdev->dev);
815 static int dsps_remove(struct platform_device *pdev)
817 struct dsps_glue *glue = platform_get_drvdata(pdev);
819 platform_device_unregister(glue->musb);
821 pm_runtime_disable(&pdev->dev);
826 static const struct dsps_musb_wrapper am33xx_driver_data = {
831 .epintr_clear = 0x40,
832 .epintr_status = 0x30,
833 .coreintr_set = 0x3c,
834 .coreintr_clear = 0x44,
835 .coreintr_status = 0x34,
846 .usb_bitmap = (0x1ff << 0),
850 .txep_bitmap = (0xffff << 0),
853 .rxep_bitmap = (0xfffe << 16),
854 .poll_timeout = 2000, /* ms */
857 static const struct of_device_id musb_dsps_of_match[] = {
858 { .compatible = "ti,musb-am33xx",
859 .data = &am33xx_driver_data, },
860 { .compatible = "ti,musb-dm816",
861 .data = &am33xx_driver_data, },
864 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
866 #ifdef CONFIG_PM_SLEEP
867 static int dsps_suspend(struct device *dev)
869 struct dsps_glue *glue = dev_get_drvdata(dev);
870 const struct dsps_musb_wrapper *wrp = glue->wrp;
871 struct musb *musb = platform_get_drvdata(glue->musb);
874 del_timer_sync(&glue->timer);
877 /* This can happen if the musb device is in -EPROBE_DEFER */
880 mbase = musb->ctrl_base;
881 glue->context.control = musb_readl(mbase, wrp->control);
882 glue->context.epintr = musb_readl(mbase, wrp->epintr_set);
883 glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set);
884 glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi);
885 glue->context.mode = musb_readl(mbase, wrp->mode);
886 glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
887 glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
892 static int dsps_resume(struct device *dev)
894 struct dsps_glue *glue = dev_get_drvdata(dev);
895 const struct dsps_musb_wrapper *wrp = glue->wrp;
896 struct musb *musb = platform_get_drvdata(glue->musb);
902 mbase = musb->ctrl_base;
903 musb_writel(mbase, wrp->control, glue->context.control);
904 musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
905 musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr);
906 musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi);
907 musb_writel(mbase, wrp->mode, glue->context.mode);
908 musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
909 musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
910 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
911 musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
912 mod_timer(&glue->timer, jiffies +
913 msecs_to_jiffies(wrp->poll_timeout));
919 static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
921 static struct platform_driver dsps_usbss_driver = {
923 .remove = dsps_remove,
927 .of_match_table = musb_dsps_of_match,
931 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
932 MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
933 MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
934 MODULE_LICENSE("GPL v2");
936 module_platform_driver(dsps_usbss_driver);