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 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
252 case OTG_STATE_A_IDLE:
253 case OTG_STATE_B_IDLE:
254 if (!glue->vbus_irq) {
255 if (devctl & MUSB_DEVCTL_BDEVICE) {
256 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
259 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
262 if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
263 musb_writeb(mregs, MUSB_DEVCTL,
264 MUSB_DEVCTL_SESSION);
266 dsps_mod_timer_optional(glue);
268 case OTG_STATE_A_WAIT_VFALL:
269 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
270 musb_writel(musb->ctrl_base, wrp->coreintr_set,
271 MUSB_INTR_VBUSERROR << wrp->usb_shift);
280 static void otg_timer(unsigned long _musb)
282 struct musb *musb = (void *)_musb;
283 struct device *dev = musb->controller;
287 err = pm_runtime_get(dev);
288 if ((err != -EINPROGRESS) && err < 0) {
289 dev_err(dev, "Poll could not pm_runtime_get: %i\n", err);
290 pm_runtime_put_noidle(dev);
295 spin_lock_irqsave(&musb->lock, flags);
296 err = musb_queue_resume_work(musb, dsps_check_status, NULL);
298 dev_err(dev, "%s resume work: %i\n", __func__, err);
299 spin_unlock_irqrestore(&musb->lock, flags);
300 pm_runtime_mark_last_busy(dev);
301 pm_runtime_put_autosuspend(dev);
304 static void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
307 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
308 const struct dsps_musb_wrapper *wrp = glue->wrp;
310 /* musb->lock might already been held */
311 epintr = (1 << epnum) << wrp->rxep_shift;
312 musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
315 static irqreturn_t dsps_interrupt(int irq, void *hci)
317 struct musb *musb = hci;
318 void __iomem *reg_base = musb->ctrl_base;
319 struct device *dev = musb->controller;
320 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
321 const struct dsps_musb_wrapper *wrp = glue->wrp;
323 irqreturn_t ret = IRQ_NONE;
326 spin_lock_irqsave(&musb->lock, flags);
328 /* Get endpoint interrupts */
329 epintr = musb_readl(reg_base, wrp->epintr_status);
330 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
331 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
334 musb_writel(reg_base, wrp->epintr_status, epintr);
336 /* Get usb core interrupts */
337 usbintr = musb_readl(reg_base, wrp->coreintr_status);
338 if (!usbintr && !epintr)
341 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
343 musb_writel(reg_base, wrp->coreintr_status, usbintr);
345 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
348 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
349 int drvvbus = musb_readl(reg_base, wrp->status);
350 void __iomem *mregs = musb->mregs;
351 u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
354 err = musb->int_usb & MUSB_INTR_VBUSERROR;
357 * The Mentor core doesn't debounce VBUS as needed
358 * to cope with device connect current spikes. This
359 * means it's not uncommon for bus-powered devices
360 * to get VBUS errors during enumeration.
362 * This is a workaround, but newer RTL from Mentor
363 * seems to allow a better one: "re"-starting sessions
364 * without waiting for VBUS to stop registering in
367 musb->int_usb &= ~MUSB_INTR_VBUSERROR;
368 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
369 dsps_mod_timer_optional(glue);
370 WARNING("VBUS error workaround (delay coming)\n");
371 } else if (drvvbus) {
373 musb->xceiv->otg->default_a = 1;
374 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
375 dsps_mod_timer_optional(glue);
379 musb->xceiv->otg->default_a = 0;
380 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
383 /* NOTE: this must complete power-on within 100 ms. */
384 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
385 drvvbus ? "on" : "off",
386 usb_otg_state_string(musb->xceiv->otg->state),
392 if (musb->int_tx || musb->int_rx || musb->int_usb)
393 ret |= musb_interrupt(musb);
395 /* Poll for ID change and connect */
396 switch (musb->xceiv->otg->state) {
397 case OTG_STATE_B_IDLE:
398 case OTG_STATE_A_WAIT_BCON:
399 dsps_mod_timer_optional(glue);
406 spin_unlock_irqrestore(&musb->lock, flags);
411 static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
417 sprintf(buf, "%s.dsps", dev_name(musb->controller));
418 root = debugfs_create_dir(buf, NULL);
421 glue->dbgfs_root = root;
423 glue->regset.regs = dsps_musb_regs;
424 glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
425 glue->regset.base = musb->ctrl_base;
427 file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
429 debugfs_remove_recursive(root);
435 static int dsps_musb_init(struct musb *musb)
437 struct device *dev = musb->controller;
438 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
439 struct platform_device *parent = to_platform_device(dev->parent);
440 const struct dsps_musb_wrapper *wrp = glue->wrp;
441 void __iomem *reg_base;
446 r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
447 reg_base = devm_ioremap_resource(dev, r);
448 if (IS_ERR(reg_base))
449 return PTR_ERR(reg_base);
450 musb->ctrl_base = reg_base;
452 /* NOP driver needs change if supporting dual instance */
453 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
454 if (IS_ERR(musb->xceiv))
455 return PTR_ERR(musb->xceiv);
457 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
459 /* Returns zero if e.g. not clocked */
460 rev = musb_readl(reg_base, wrp->revision);
464 usb_phy_init(musb->xceiv);
465 if (IS_ERR(musb->phy)) {
468 ret = phy_init(musb->phy);
471 ret = phy_power_on(musb->phy);
478 setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
481 musb_writel(reg_base, wrp->control, (1 << wrp->reset));
483 musb->isr = dsps_interrupt;
485 /* reset the otgdisable bit, needed for host mode to work */
486 val = musb_readl(reg_base, wrp->phy_utmi);
487 val &= ~(1 << wrp->otg_disable);
488 musb_writel(musb->ctrl_base, wrp->phy_utmi, val);
491 * Check whether the dsps version has babble control enabled.
492 * In latest silicon revision the babble control logic is enabled.
493 * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
496 val = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
497 if (val & MUSB_BABBLE_RCV_DISABLE) {
498 glue->sw_babble_enabled = true;
499 val |= MUSB_BABBLE_SW_SESSION_CTRL;
500 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
503 dsps_mod_timer(glue, -1);
505 return dsps_musb_dbg_init(musb, glue);
508 static int dsps_musb_exit(struct musb *musb)
510 struct device *dev = musb->controller;
511 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
513 del_timer_sync(&glue->timer);
514 usb_phy_shutdown(musb->xceiv);
515 phy_power_off(musb->phy);
517 debugfs_remove_recursive(glue->dbgfs_root);
522 static int dsps_musb_set_mode(struct musb *musb, u8 mode)
524 struct device *dev = musb->controller;
525 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
526 const struct dsps_musb_wrapper *wrp = glue->wrp;
527 void __iomem *ctrl_base = musb->ctrl_base;
530 reg = musb_readl(ctrl_base, wrp->mode);
534 reg &= ~(1 << wrp->iddig);
537 * if we're setting mode to host-only or device-only, we're
538 * going to ignore whatever the PHY sends us and just force
539 * ID pin status by SW
541 reg |= (1 << wrp->iddig_mux);
543 musb_writel(ctrl_base, wrp->mode, reg);
544 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
546 case MUSB_PERIPHERAL:
547 reg |= (1 << wrp->iddig);
550 * if we're setting mode to host-only or device-only, we're
551 * going to ignore whatever the PHY sends us and just force
552 * ID pin status by SW
554 reg |= (1 << wrp->iddig_mux);
556 musb_writel(ctrl_base, wrp->mode, reg);
559 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
562 dev_err(glue->dev, "unsupported mode %d\n", mode);
569 static bool dsps_sw_babble_control(struct musb *musb)
572 bool session_restart = false;
574 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
575 dev_dbg(musb->controller, "babble: MUSB_BABBLE_CTL value %x\n",
578 * check line monitor flag to check whether babble is
581 dev_dbg(musb->controller, "STUCK_J is %s\n",
582 babble_ctl & MUSB_BABBLE_STUCK_J ? "set" : "reset");
584 if (babble_ctl & MUSB_BABBLE_STUCK_J) {
588 * babble is due to noise, then set transmit idle (d7 bit)
589 * to resume normal operation
591 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
592 babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE;
593 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, babble_ctl);
595 /* wait till line monitor flag cleared */
596 dev_dbg(musb->controller, "Set TXIDLE, wait J to clear\n");
598 babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
600 } while ((babble_ctl & MUSB_BABBLE_STUCK_J) && timeout--);
602 /* check whether stuck_at_j bit cleared */
603 if (babble_ctl & MUSB_BABBLE_STUCK_J) {
605 * real babble condition has occurred
606 * restart the controller to start the
609 dev_dbg(musb->controller, "J not cleared, misc (%x)\n",
611 session_restart = true;
614 session_restart = true;
617 return session_restart;
620 static int dsps_musb_recover(struct musb *musb)
622 struct device *dev = musb->controller;
623 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
624 int session_restart = 0;
626 if (glue->sw_babble_enabled)
627 session_restart = dsps_sw_babble_control(musb);
631 return session_restart ? 0 : -EPIPE;
634 /* Similar to am35x, dm81xx support only 32-bit read operation */
635 static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
637 void __iomem *fifo = hw_ep->fifo;
640 ioread32_rep(fifo, dst, len >> 2);
645 /* Read any remaining 1 to 3 bytes */
647 u32 val = musb_readl(fifo, 0);
648 memcpy(dst, &val, len);
652 #ifdef CONFIG_USB_TI_CPPI41_DMA
653 static void dsps_dma_controller_callback(struct dma_controller *c)
655 struct musb *musb = c->musb;
656 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
657 void __iomem *usbss_base = glue->usbss_base;
660 status = musb_readl(usbss_base, USBSS_IRQ_STATUS);
661 if (status & USBSS_IRQ_PD_COMP)
662 musb_writel(usbss_base, USBSS_IRQ_STATUS, USBSS_IRQ_PD_COMP);
665 static struct dma_controller *
666 dsps_dma_controller_create(struct musb *musb, void __iomem *base)
668 struct dma_controller *controller;
669 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
670 void __iomem *usbss_base = glue->usbss_base;
672 controller = cppi41_dma_controller_create(musb, base);
673 if (IS_ERR_OR_NULL(controller))
676 musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
677 controller->dma_callback = dsps_dma_controller_callback;
682 static void dsps_dma_controller_destroy(struct dma_controller *c)
684 struct musb *musb = c->musb;
685 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
686 void __iomem *usbss_base = glue->usbss_base;
688 musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
689 cppi41_dma_controller_destroy(c);
692 #ifdef CONFIG_PM_SLEEP
693 static void dsps_dma_controller_suspend(struct dsps_glue *glue)
695 void __iomem *usbss_base = glue->usbss_base;
697 musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
700 static void dsps_dma_controller_resume(struct dsps_glue *glue)
702 void __iomem *usbss_base = glue->usbss_base;
704 musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
707 #else /* CONFIG_USB_TI_CPPI41_DMA */
708 #ifdef CONFIG_PM_SLEEP
709 static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
710 static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
712 #endif /* CONFIG_USB_TI_CPPI41_DMA */
714 static struct musb_platform_ops dsps_ops = {
715 .quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
716 .init = dsps_musb_init,
717 .exit = dsps_musb_exit,
719 #ifdef CONFIG_USB_TI_CPPI41_DMA
720 .dma_init = dsps_dma_controller_create,
721 .dma_exit = dsps_dma_controller_destroy,
723 .enable = dsps_musb_enable,
724 .disable = dsps_musb_disable,
726 .set_mode = dsps_musb_set_mode,
727 .recover = dsps_musb_recover,
728 .clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
731 static u64 musb_dmamask = DMA_BIT_MASK(32);
733 static int get_int_prop(struct device_node *dn, const char *s)
738 ret = of_property_read_u32(dn, s, &val);
744 static int get_musb_port_mode(struct device *dev)
746 enum usb_dr_mode mode;
748 mode = usb_get_dr_mode(dev);
750 case USB_DR_MODE_HOST:
751 return MUSB_PORT_MODE_HOST;
753 case USB_DR_MODE_PERIPHERAL:
754 return MUSB_PORT_MODE_GADGET;
756 case USB_DR_MODE_UNKNOWN:
757 case USB_DR_MODE_OTG:
759 return MUSB_PORT_MODE_DUAL_ROLE;
763 static int dsps_create_musb_pdev(struct dsps_glue *glue,
764 struct platform_device *parent)
766 struct musb_hdrc_platform_data pdata;
767 struct resource resources[2];
768 struct resource *res;
769 struct device *dev = &parent->dev;
770 struct musb_hdrc_config *config;
771 struct platform_device *musb;
772 struct device_node *dn = parent->dev.of_node;
775 memset(resources, 0, sizeof(resources));
776 res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
778 dev_err(dev, "failed to get memory.\n");
783 res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc");
785 dev_err(dev, "failed to get irq.\n");
790 /* allocate the child platform device */
791 musb = platform_device_alloc("musb-hdrc",
792 (resources[0].start & 0xFFF) == 0x400 ? 0 : 1);
794 dev_err(dev, "failed to allocate musb device\n");
798 musb->dev.parent = dev;
799 musb->dev.dma_mask = &musb_dmamask;
800 musb->dev.coherent_dma_mask = musb_dmamask;
804 ret = platform_device_add_resources(musb, resources,
805 ARRAY_SIZE(resources));
807 dev_err(dev, "failed to add resources\n");
811 config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
816 pdata.config = config;
817 pdata.platform_ops = &dsps_ops;
819 config->num_eps = get_int_prop(dn, "mentor,num-eps");
820 config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
821 config->host_port_deassert_reset_at_resume = 1;
822 pdata.mode = get_musb_port_mode(dev);
823 /* DT keeps this entry in mA, musb expects it as per USB spec */
824 pdata.power = get_int_prop(dn, "mentor,power") / 2;
826 ret = of_property_read_u32(dn, "mentor,multipoint", &val);
828 config->multipoint = true;
830 config->maximum_speed = usb_get_maximum_speed(&parent->dev);
831 switch (config->maximum_speed) {
835 case USB_SPEED_SUPER:
836 dev_warn(dev, "ignore incorrect maximum_speed "
837 "(super-speed) setting in dts");
840 config->maximum_speed = USB_SPEED_HIGH;
843 ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
845 dev_err(dev, "failed to add platform_data\n");
849 ret = platform_device_add(musb);
851 dev_err(dev, "failed to register musb device\n");
857 platform_device_put(musb);
861 static irqreturn_t dsps_vbus_threaded_irq(int irq, void *priv)
863 struct dsps_glue *glue = priv;
864 struct musb *musb = platform_get_drvdata(glue->musb);
869 dev_dbg(glue->dev, "VBUS interrupt\n");
870 dsps_mod_timer(glue, 0);
875 static int dsps_setup_optional_vbus_irq(struct platform_device *pdev,
876 struct dsps_glue *glue)
880 glue->vbus_irq = platform_get_irq_byname(pdev, "vbus");
881 if (glue->vbus_irq == -EPROBE_DEFER)
882 return -EPROBE_DEFER;
884 if (glue->vbus_irq <= 0) {
889 error = devm_request_threaded_irq(glue->dev, glue->vbus_irq,
890 NULL, dsps_vbus_threaded_irq,
897 dev_dbg(glue->dev, "VBUS irq %i configured\n", glue->vbus_irq);
902 static int dsps_probe(struct platform_device *pdev)
904 const struct of_device_id *match;
905 const struct dsps_musb_wrapper *wrp;
906 struct dsps_glue *glue;
909 if (!strcmp(pdev->name, "musb-hdrc"))
912 match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
914 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
919 if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
920 dsps_ops.read_fifo = dsps_read_fifo32;
923 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
927 glue->dev = &pdev->dev;
929 glue->usbss_base = of_iomap(pdev->dev.parent->of_node, 0);
930 if (!glue->usbss_base)
933 if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
934 ret = dsps_setup_optional_vbus_irq(pdev, glue);
939 platform_set_drvdata(pdev, glue);
940 pm_runtime_enable(&pdev->dev);
941 ret = dsps_create_musb_pdev(glue, pdev);
948 pm_runtime_disable(&pdev->dev);
950 iounmap(glue->usbss_base);
954 static int dsps_remove(struct platform_device *pdev)
956 struct dsps_glue *glue = platform_get_drvdata(pdev);
958 platform_device_unregister(glue->musb);
960 pm_runtime_disable(&pdev->dev);
961 iounmap(glue->usbss_base);
966 static const struct dsps_musb_wrapper am33xx_driver_data = {
971 .epintr_clear = 0x40,
972 .epintr_status = 0x30,
973 .coreintr_set = 0x3c,
974 .coreintr_clear = 0x44,
975 .coreintr_status = 0x34,
986 .usb_bitmap = (0x1ff << 0),
990 .txep_bitmap = (0xffff << 0),
993 .rxep_bitmap = (0xfffe << 16),
994 .poll_timeout = 2000, /* ms */
997 static const struct of_device_id musb_dsps_of_match[] = {
998 { .compatible = "ti,musb-am33xx",
999 .data = &am33xx_driver_data, },
1000 { .compatible = "ti,musb-dm816",
1001 .data = &am33xx_driver_data, },
1004 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
1006 #ifdef CONFIG_PM_SLEEP
1007 static int dsps_suspend(struct device *dev)
1009 struct dsps_glue *glue = dev_get_drvdata(dev);
1010 const struct dsps_musb_wrapper *wrp = glue->wrp;
1011 struct musb *musb = platform_get_drvdata(glue->musb);
1012 void __iomem *mbase;
1014 del_timer_sync(&glue->timer);
1017 /* This can happen if the musb device is in -EPROBE_DEFER */
1020 mbase = musb->ctrl_base;
1021 glue->context.control = musb_readl(mbase, wrp->control);
1022 glue->context.epintr = musb_readl(mbase, wrp->epintr_set);
1023 glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set);
1024 glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi);
1025 glue->context.mode = musb_readl(mbase, wrp->mode);
1026 glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
1027 glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
1029 dsps_dma_controller_suspend(glue);
1034 static int dsps_resume(struct device *dev)
1036 struct dsps_glue *glue = dev_get_drvdata(dev);
1037 const struct dsps_musb_wrapper *wrp = glue->wrp;
1038 struct musb *musb = platform_get_drvdata(glue->musb);
1039 void __iomem *mbase;
1044 dsps_dma_controller_resume(glue);
1046 mbase = musb->ctrl_base;
1047 musb_writel(mbase, wrp->control, glue->context.control);
1048 musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
1049 musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr);
1050 musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi);
1051 musb_writel(mbase, wrp->mode, glue->context.mode);
1052 musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
1053 musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
1054 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
1055 musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
1056 dsps_mod_timer(glue, -1);
1062 static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
1064 static struct platform_driver dsps_usbss_driver = {
1065 .probe = dsps_probe,
1066 .remove = dsps_remove,
1068 .name = "musb-dsps",
1070 .of_match_table = musb_dsps_of_match,
1074 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
1075 MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
1076 MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
1077 MODULE_LICENSE("GPL v2");
1079 module_platform_driver(dsps_usbss_driver);