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 int vbus_irq; /* optional vbus irq */
122 struct timer_list timer; /* otg_workaround timer */
123 unsigned long last_timer; /* last timer data for each instance */
124 bool sw_babble_enabled;
125 void __iomem *usbss_base;
127 struct dsps_context context;
128 struct debugfs_regset32 regset;
129 struct dentry *dbgfs_root;
132 static const struct debugfs_reg32 dsps_musb_regs[] = {
133 { "revision", 0x00 },
137 { "intr0_stat", 0x30 },
138 { "intr1_stat", 0x34 },
139 { "intr0_set", 0x38 },
140 { "intr1_set", 0x3c },
144 { "srpfixtime", 0xd4 },
146 { "phy_utmi", 0xe0 },
150 static void dsps_mod_timer(struct dsps_glue *glue, int wait_ms)
155 wait = msecs_to_jiffies(glue->wrp->poll_timeout);
157 wait = msecs_to_jiffies(wait_ms);
159 mod_timer(&glue->timer, jiffies + wait);
163 * If no vbus irq from the PMIC is configured, we need to poll VBUS status.
165 static void dsps_mod_timer_optional(struct dsps_glue *glue)
170 dsps_mod_timer(glue, -1);
173 /* USBSS / USB AM335x */
174 #define USBSS_IRQ_STATUS 0x28
175 #define USBSS_IRQ_ENABLER 0x2c
176 #define USBSS_IRQ_CLEARR 0x30
178 #define USBSS_IRQ_PD_COMP (1 << 2)
181 * dsps_musb_enable - enable interrupts
183 static void dsps_musb_enable(struct musb *musb)
185 struct device *dev = musb->controller;
186 struct platform_device *pdev = to_platform_device(dev->parent);
187 struct dsps_glue *glue = platform_get_drvdata(pdev);
188 const struct dsps_musb_wrapper *wrp = glue->wrp;
189 void __iomem *reg_base = musb->ctrl_base;
190 u32 epmask, coremask;
192 /* Workaround: setup IRQs through both register sets. */
193 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
194 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
195 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
197 musb_writel(reg_base, wrp->epintr_set, epmask);
198 musb_writel(reg_base, wrp->coreintr_set, coremask);
199 /* start polling for ID change in dual-role idle mode */
200 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
201 musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
202 dsps_mod_timer(glue, -1);
206 * dsps_musb_disable - disable HDRC and flush interrupts
208 static void dsps_musb_disable(struct musb *musb)
210 struct device *dev = musb->controller;
211 struct platform_device *pdev = to_platform_device(dev->parent);
212 struct dsps_glue *glue = platform_get_drvdata(pdev);
213 const struct dsps_musb_wrapper *wrp = glue->wrp;
214 void __iomem *reg_base = musb->ctrl_base;
216 musb_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
217 musb_writel(reg_base, wrp->epintr_clear,
218 wrp->txep_bitmap | wrp->rxep_bitmap);
219 del_timer_sync(&glue->timer);
222 /* Caller must take musb->lock */
223 static int dsps_check_status(struct musb *musb, void *unused)
225 void __iomem *mregs = musb->mregs;
226 struct device *dev = musb->controller;
227 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
228 const struct dsps_musb_wrapper *wrp = glue->wrp;
230 int skip_session = 0;
233 del_timer(&glue->timer);
236 * We poll because DSPS IP's won't expose several OTG-critical
237 * status change events (from the transceiver) otherwise.
239 devctl = musb_readb(mregs, MUSB_DEVCTL);
240 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
241 usb_otg_state_string(musb->xceiv->otg->state));
243 switch (musb->xceiv->otg->state) {
244 case OTG_STATE_A_WAIT_VRISE:
245 dsps_mod_timer_optional(glue);
247 case OTG_STATE_A_WAIT_BCON:
248 /* keep VBUS on for host-only mode */
249 if (musb->port_mode == MUSB_PORT_MODE_HOST) {
250 dsps_mod_timer_optional(glue);
253 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
257 case OTG_STATE_A_IDLE:
258 case OTG_STATE_B_IDLE:
259 if (!glue->vbus_irq) {
260 if (devctl & MUSB_DEVCTL_BDEVICE) {
261 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
264 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
267 if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
268 musb_writeb(mregs, MUSB_DEVCTL,
269 MUSB_DEVCTL_SESSION);
271 dsps_mod_timer_optional(glue);
273 case OTG_STATE_A_WAIT_VFALL:
274 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
275 musb_writel(musb->ctrl_base, wrp->coreintr_set,
276 MUSB_INTR_VBUSERROR << wrp->usb_shift);
285 static void otg_timer(struct timer_list *t)
287 struct dsps_glue *glue = from_timer(glue, t, timer);
288 struct musb *musb = platform_get_drvdata(glue->musb);
289 struct device *dev = musb->controller;
293 err = pm_runtime_get(dev);
294 if ((err != -EINPROGRESS) && err < 0) {
295 dev_err(dev, "Poll could not pm_runtime_get: %i\n", err);
296 pm_runtime_put_noidle(dev);
301 spin_lock_irqsave(&musb->lock, flags);
302 err = musb_queue_resume_work(musb, dsps_check_status, NULL);
304 dev_err(dev, "%s resume work: %i\n", __func__, err);
305 spin_unlock_irqrestore(&musb->lock, flags);
306 pm_runtime_mark_last_busy(dev);
307 pm_runtime_put_autosuspend(dev);
310 static void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
313 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
314 const struct dsps_musb_wrapper *wrp = glue->wrp;
316 /* musb->lock might already been held */
317 epintr = (1 << epnum) << wrp->rxep_shift;
318 musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
321 static irqreturn_t dsps_interrupt(int irq, void *hci)
323 struct musb *musb = hci;
324 void __iomem *reg_base = musb->ctrl_base;
325 struct device *dev = musb->controller;
326 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
327 const struct dsps_musb_wrapper *wrp = glue->wrp;
329 irqreturn_t ret = IRQ_NONE;
332 spin_lock_irqsave(&musb->lock, flags);
334 /* Get endpoint interrupts */
335 epintr = musb_readl(reg_base, wrp->epintr_status);
336 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
337 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
340 musb_writel(reg_base, wrp->epintr_status, epintr);
342 /* Get usb core interrupts */
343 usbintr = musb_readl(reg_base, wrp->coreintr_status);
344 if (!usbintr && !epintr)
347 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
349 musb_writel(reg_base, wrp->coreintr_status, usbintr);
351 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
354 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
355 int drvvbus = musb_readl(reg_base, wrp->status);
356 void __iomem *mregs = musb->mregs;
357 u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
360 err = musb->int_usb & MUSB_INTR_VBUSERROR;
363 * The Mentor core doesn't debounce VBUS as needed
364 * to cope with device connect current spikes. This
365 * means it's not uncommon for bus-powered devices
366 * to get VBUS errors during enumeration.
368 * This is a workaround, but newer RTL from Mentor
369 * seems to allow a better one: "re"-starting sessions
370 * without waiting for VBUS to stop registering in
373 musb->int_usb &= ~MUSB_INTR_VBUSERROR;
374 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
375 dsps_mod_timer_optional(glue);
376 WARNING("VBUS error workaround (delay coming)\n");
377 } else if (drvvbus) {
379 musb->xceiv->otg->default_a = 1;
380 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
381 dsps_mod_timer_optional(glue);
385 musb->xceiv->otg->default_a = 0;
386 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
389 /* NOTE: this must complete power-on within 100 ms. */
390 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
391 drvvbus ? "on" : "off",
392 usb_otg_state_string(musb->xceiv->otg->state),
398 if (musb->int_tx || musb->int_rx || musb->int_usb)
399 ret |= musb_interrupt(musb);
401 /* Poll for ID change and connect */
402 switch (musb->xceiv->otg->state) {
403 case OTG_STATE_B_IDLE:
404 case OTG_STATE_A_WAIT_BCON:
405 dsps_mod_timer_optional(glue);
412 spin_unlock_irqrestore(&musb->lock, flags);
417 static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
423 sprintf(buf, "%s.dsps", dev_name(musb->controller));
424 root = debugfs_create_dir(buf, NULL);
427 glue->dbgfs_root = root;
429 glue->regset.regs = dsps_musb_regs;
430 glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
431 glue->regset.base = musb->ctrl_base;
433 file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
435 debugfs_remove_recursive(root);
441 static int dsps_musb_init(struct musb *musb)
443 struct device *dev = musb->controller;
444 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
445 struct platform_device *parent = to_platform_device(dev->parent);
446 const struct dsps_musb_wrapper *wrp = glue->wrp;
447 void __iomem *reg_base;
452 r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
453 reg_base = devm_ioremap_resource(dev, r);
454 if (IS_ERR(reg_base))
455 return PTR_ERR(reg_base);
456 musb->ctrl_base = reg_base;
458 /* NOP driver needs change if supporting dual instance */
459 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
460 if (IS_ERR(musb->xceiv))
461 return PTR_ERR(musb->xceiv);
463 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
465 /* Returns zero if e.g. not clocked */
466 rev = musb_readl(reg_base, wrp->revision);
470 usb_phy_init(musb->xceiv);
471 if (IS_ERR(musb->phy)) {
474 ret = phy_init(musb->phy);
477 ret = phy_power_on(musb->phy);
484 timer_setup(&glue->timer, otg_timer, 0);
487 musb_writel(reg_base, wrp->control, (1 << wrp->reset));
489 musb->isr = dsps_interrupt;
491 /* reset the otgdisable bit, needed for host mode to work */
492 val = musb_readl(reg_base, wrp->phy_utmi);
493 val &= ~(1 << wrp->otg_disable);
494 musb_writel(musb->ctrl_base, wrp->phy_utmi, val);
497 * Check whether the dsps version has babble control enabled.
498 * In latest silicon revision the babble control logic is enabled.
499 * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
502 val = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
503 if (val & MUSB_BABBLE_RCV_DISABLE) {
504 glue->sw_babble_enabled = true;
505 val |= MUSB_BABBLE_SW_SESSION_CTRL;
506 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
509 dsps_mod_timer(glue, -1);
511 return dsps_musb_dbg_init(musb, glue);
514 static int dsps_musb_exit(struct musb *musb)
516 struct device *dev = musb->controller;
517 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
519 del_timer_sync(&glue->timer);
520 usb_phy_shutdown(musb->xceiv);
521 phy_power_off(musb->phy);
523 debugfs_remove_recursive(glue->dbgfs_root);
528 static int dsps_musb_set_mode(struct musb *musb, u8 mode)
530 struct device *dev = musb->controller;
531 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
532 const struct dsps_musb_wrapper *wrp = glue->wrp;
533 void __iomem *ctrl_base = musb->ctrl_base;
536 reg = musb_readl(ctrl_base, wrp->mode);
540 reg &= ~(1 << wrp->iddig);
543 * if we're setting mode to host-only or device-only, we're
544 * going to ignore whatever the PHY sends us and just force
545 * ID pin status by SW
547 reg |= (1 << wrp->iddig_mux);
549 musb_writel(ctrl_base, wrp->mode, reg);
550 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
552 case MUSB_PERIPHERAL:
553 reg |= (1 << wrp->iddig);
556 * if we're setting mode to host-only or device-only, we're
557 * going to ignore whatever the PHY sends us and just force
558 * ID pin status by SW
560 reg |= (1 << wrp->iddig_mux);
562 musb_writel(ctrl_base, wrp->mode, reg);
565 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
568 dev_err(glue->dev, "unsupported mode %d\n", mode);
575 static bool dsps_sw_babble_control(struct musb *musb)
578 bool session_restart = false;
580 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
581 dev_dbg(musb->controller, "babble: MUSB_BABBLE_CTL value %x\n",
584 * check line monitor flag to check whether babble is
587 dev_dbg(musb->controller, "STUCK_J is %s\n",
588 babble_ctl & MUSB_BABBLE_STUCK_J ? "set" : "reset");
590 if (babble_ctl & MUSB_BABBLE_STUCK_J) {
594 * babble is due to noise, then set transmit idle (d7 bit)
595 * to resume normal operation
597 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
598 babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE;
599 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, babble_ctl);
601 /* wait till line monitor flag cleared */
602 dev_dbg(musb->controller, "Set TXIDLE, wait J to clear\n");
604 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
606 } while ((babble_ctl & MUSB_BABBLE_STUCK_J) && timeout--);
608 /* check whether stuck_at_j bit cleared */
609 if (babble_ctl & MUSB_BABBLE_STUCK_J) {
611 * real babble condition has occurred
612 * restart the controller to start the
615 dev_dbg(musb->controller, "J not cleared, misc (%x)\n",
617 session_restart = true;
620 session_restart = true;
623 return session_restart;
626 static int dsps_musb_recover(struct musb *musb)
628 struct device *dev = musb->controller;
629 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
630 int session_restart = 0;
632 if (glue->sw_babble_enabled)
633 session_restart = dsps_sw_babble_control(musb);
637 return session_restart ? 0 : -EPIPE;
640 /* Similar to am35x, dm81xx support only 32-bit read operation */
641 static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
643 void __iomem *fifo = hw_ep->fifo;
646 ioread32_rep(fifo, dst, len >> 2);
651 /* Read any remaining 1 to 3 bytes */
653 u32 val = musb_readl(fifo, 0);
654 memcpy(dst, &val, len);
658 #ifdef CONFIG_USB_TI_CPPI41_DMA
659 static void dsps_dma_controller_callback(struct dma_controller *c)
661 struct musb *musb = c->musb;
662 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
663 void __iomem *usbss_base = glue->usbss_base;
666 status = musb_readl(usbss_base, USBSS_IRQ_STATUS);
667 if (status & USBSS_IRQ_PD_COMP)
668 musb_writel(usbss_base, USBSS_IRQ_STATUS, USBSS_IRQ_PD_COMP);
671 static struct dma_controller *
672 dsps_dma_controller_create(struct musb *musb, void __iomem *base)
674 struct dma_controller *controller;
675 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
676 void __iomem *usbss_base = glue->usbss_base;
678 controller = cppi41_dma_controller_create(musb, base);
679 if (IS_ERR_OR_NULL(controller))
682 musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
683 controller->dma_callback = dsps_dma_controller_callback;
688 static void dsps_dma_controller_destroy(struct dma_controller *c)
690 struct musb *musb = c->musb;
691 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
692 void __iomem *usbss_base = glue->usbss_base;
694 musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
695 cppi41_dma_controller_destroy(c);
698 #ifdef CONFIG_PM_SLEEP
699 static void dsps_dma_controller_suspend(struct dsps_glue *glue)
701 void __iomem *usbss_base = glue->usbss_base;
703 musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
706 static void dsps_dma_controller_resume(struct dsps_glue *glue)
708 void __iomem *usbss_base = glue->usbss_base;
710 musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
713 #else /* CONFIG_USB_TI_CPPI41_DMA */
714 #ifdef CONFIG_PM_SLEEP
715 static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
716 static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
718 #endif /* CONFIG_USB_TI_CPPI41_DMA */
720 static struct musb_platform_ops dsps_ops = {
721 .quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
722 .init = dsps_musb_init,
723 .exit = dsps_musb_exit,
725 #ifdef CONFIG_USB_TI_CPPI41_DMA
726 .dma_init = dsps_dma_controller_create,
727 .dma_exit = dsps_dma_controller_destroy,
729 .enable = dsps_musb_enable,
730 .disable = dsps_musb_disable,
732 .set_mode = dsps_musb_set_mode,
733 .recover = dsps_musb_recover,
734 .clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
737 static u64 musb_dmamask = DMA_BIT_MASK(32);
739 static int get_int_prop(struct device_node *dn, const char *s)
744 ret = of_property_read_u32(dn, s, &val);
750 static int get_musb_port_mode(struct device *dev)
752 enum usb_dr_mode mode;
754 mode = usb_get_dr_mode(dev);
756 case USB_DR_MODE_HOST:
757 return MUSB_PORT_MODE_HOST;
759 case USB_DR_MODE_PERIPHERAL:
760 return MUSB_PORT_MODE_GADGET;
762 case USB_DR_MODE_UNKNOWN:
763 case USB_DR_MODE_OTG:
765 return MUSB_PORT_MODE_DUAL_ROLE;
769 static int dsps_create_musb_pdev(struct dsps_glue *glue,
770 struct platform_device *parent)
772 struct musb_hdrc_platform_data pdata;
773 struct resource resources[2];
774 struct resource *res;
775 struct device *dev = &parent->dev;
776 struct musb_hdrc_config *config;
777 struct platform_device *musb;
778 struct device_node *dn = parent->dev.of_node;
781 memset(resources, 0, sizeof(resources));
782 res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
784 dev_err(dev, "failed to get memory.\n");
789 res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc");
791 dev_err(dev, "failed to get irq.\n");
796 /* allocate the child platform device */
797 musb = platform_device_alloc("musb-hdrc",
798 (resources[0].start & 0xFFF) == 0x400 ? 0 : 1);
800 dev_err(dev, "failed to allocate musb device\n");
804 musb->dev.parent = dev;
805 musb->dev.dma_mask = &musb_dmamask;
806 musb->dev.coherent_dma_mask = musb_dmamask;
810 ret = platform_device_add_resources(musb, resources,
811 ARRAY_SIZE(resources));
813 dev_err(dev, "failed to add resources\n");
817 config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
822 pdata.config = config;
823 pdata.platform_ops = &dsps_ops;
825 config->num_eps = get_int_prop(dn, "mentor,num-eps");
826 config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
827 config->host_port_deassert_reset_at_resume = 1;
828 pdata.mode = get_musb_port_mode(dev);
829 /* DT keeps this entry in mA, musb expects it as per USB spec */
830 pdata.power = get_int_prop(dn, "mentor,power") / 2;
832 ret = of_property_read_u32(dn, "mentor,multipoint", &val);
834 config->multipoint = true;
836 config->maximum_speed = usb_get_maximum_speed(&parent->dev);
837 switch (config->maximum_speed) {
841 case USB_SPEED_SUPER:
842 dev_warn(dev, "ignore incorrect maximum_speed "
843 "(super-speed) setting in dts");
846 config->maximum_speed = USB_SPEED_HIGH;
849 ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
851 dev_err(dev, "failed to add platform_data\n");
855 ret = platform_device_add(musb);
857 dev_err(dev, "failed to register musb device\n");
863 platform_device_put(musb);
867 static irqreturn_t dsps_vbus_threaded_irq(int irq, void *priv)
869 struct dsps_glue *glue = priv;
870 struct musb *musb = platform_get_drvdata(glue->musb);
875 dev_dbg(glue->dev, "VBUS interrupt\n");
876 dsps_mod_timer(glue, 0);
881 static int dsps_setup_optional_vbus_irq(struct platform_device *pdev,
882 struct dsps_glue *glue)
886 glue->vbus_irq = platform_get_irq_byname(pdev, "vbus");
887 if (glue->vbus_irq == -EPROBE_DEFER)
888 return -EPROBE_DEFER;
890 if (glue->vbus_irq <= 0) {
895 error = devm_request_threaded_irq(glue->dev, glue->vbus_irq,
896 NULL, dsps_vbus_threaded_irq,
903 dev_dbg(glue->dev, "VBUS irq %i configured\n", glue->vbus_irq);
908 static int dsps_probe(struct platform_device *pdev)
910 const struct of_device_id *match;
911 const struct dsps_musb_wrapper *wrp;
912 struct dsps_glue *glue;
915 if (!strcmp(pdev->name, "musb-hdrc"))
918 match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
920 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
925 if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
926 dsps_ops.read_fifo = dsps_read_fifo32;
929 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
933 glue->dev = &pdev->dev;
935 glue->usbss_base = of_iomap(pdev->dev.parent->of_node, 0);
936 if (!glue->usbss_base)
939 if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
940 ret = dsps_setup_optional_vbus_irq(pdev, glue);
945 platform_set_drvdata(pdev, glue);
946 pm_runtime_enable(&pdev->dev);
947 ret = dsps_create_musb_pdev(glue, pdev);
954 pm_runtime_disable(&pdev->dev);
956 iounmap(glue->usbss_base);
960 static int dsps_remove(struct platform_device *pdev)
962 struct dsps_glue *glue = platform_get_drvdata(pdev);
964 platform_device_unregister(glue->musb);
966 pm_runtime_disable(&pdev->dev);
967 iounmap(glue->usbss_base);
972 static const struct dsps_musb_wrapper am33xx_driver_data = {
977 .epintr_clear = 0x40,
978 .epintr_status = 0x30,
979 .coreintr_set = 0x3c,
980 .coreintr_clear = 0x44,
981 .coreintr_status = 0x34,
992 .usb_bitmap = (0x1ff << 0),
996 .txep_bitmap = (0xffff << 0),
999 .rxep_bitmap = (0xfffe << 16),
1000 .poll_timeout = 2000, /* ms */
1003 static const struct of_device_id musb_dsps_of_match[] = {
1004 { .compatible = "ti,musb-am33xx",
1005 .data = &am33xx_driver_data, },
1006 { .compatible = "ti,musb-dm816",
1007 .data = &am33xx_driver_data, },
1010 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
1012 #ifdef CONFIG_PM_SLEEP
1013 static int dsps_suspend(struct device *dev)
1015 struct dsps_glue *glue = dev_get_drvdata(dev);
1016 const struct dsps_musb_wrapper *wrp = glue->wrp;
1017 struct musb *musb = platform_get_drvdata(glue->musb);
1018 void __iomem *mbase;
1022 /* This can happen if the musb device is in -EPROBE_DEFER */
1025 ret = pm_runtime_get_sync(dev);
1027 pm_runtime_put_noidle(dev);
1031 del_timer_sync(&glue->timer);
1033 mbase = musb->ctrl_base;
1034 glue->context.control = musb_readl(mbase, wrp->control);
1035 glue->context.epintr = musb_readl(mbase, wrp->epintr_set);
1036 glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set);
1037 glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi);
1038 glue->context.mode = musb_readl(mbase, wrp->mode);
1039 glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
1040 glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
1042 dsps_dma_controller_suspend(glue);
1047 static int dsps_resume(struct device *dev)
1049 struct dsps_glue *glue = dev_get_drvdata(dev);
1050 const struct dsps_musb_wrapper *wrp = glue->wrp;
1051 struct musb *musb = platform_get_drvdata(glue->musb);
1052 void __iomem *mbase;
1057 dsps_dma_controller_resume(glue);
1059 mbase = musb->ctrl_base;
1060 musb_writel(mbase, wrp->control, glue->context.control);
1061 musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
1062 musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr);
1063 musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi);
1064 musb_writel(mbase, wrp->mode, glue->context.mode);
1065 musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
1066 musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
1067 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
1068 musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
1069 dsps_mod_timer(glue, -1);
1071 pm_runtime_put(dev);
1077 static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
1079 static struct platform_driver dsps_usbss_driver = {
1080 .probe = dsps_probe,
1081 .remove = dsps_remove,
1083 .name = "musb-dsps",
1085 .of_match_table = musb_dsps_of_match,
1089 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
1090 MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
1091 MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
1092 MODULE_LICENSE("GPL v2");
1094 module_platform_driver(dsps_usbss_driver);