1 // SPDX-License-Identifier: GPL-2.0
3 * Texas Instruments DSPS platforms "glue layer"
5 * Copyright (C) 2012, by Texas Instruments
7 * Based on the am35x "glue layer" code.
9 * This file is part of the Inventra Controller Driver for Linux.
11 * musb_dsps.c will be a common file for all the TI DSPS platforms
12 * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
13 * For now only ti81x is using this and in future davinci.c, am35x.c
14 * da8xx.c would be merged to this file after testing.
18 #include <linux/err.h>
19 #include <linux/platform_device.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/module.h>
23 #include <linux/usb/usb_phy_generic.h>
24 #include <linux/platform_data/usb-omap.h>
25 #include <linux/sizes.h>
28 #include <linux/of_device.h>
29 #include <linux/of_address.h>
30 #include <linux/of_irq.h>
31 #include <linux/usb/of.h>
33 #include <linux/debugfs.h>
35 #include "musb_core.h"
37 static const struct of_device_id musb_dsps_of_match[];
40 * DSPS musb wrapper register offset.
41 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
44 struct dsps_musb_wrapper {
59 /* bit positions for control */
62 /* bit positions for interrupt */
68 unsigned txep_shift:5;
72 unsigned rxep_shift:5;
76 /* bit positions for phy_utmi */
77 unsigned otg_disable:5;
79 /* bit positions for mode */
82 /* miscellaneous stuff */
83 unsigned poll_timeout;
87 * register shadow for suspend
100 * DSPS glue structure.
104 struct platform_device *musb; /* child musb pdev */
105 const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
106 int vbus_irq; /* optional vbus irq */
107 unsigned long last_timer; /* last timer data for each instance */
108 bool sw_babble_enabled;
109 void __iomem *usbss_base;
111 struct dsps_context context;
112 struct debugfs_regset32 regset;
113 struct dentry *dbgfs_root;
116 static const struct debugfs_reg32 dsps_musb_regs[] = {
117 { "revision", 0x00 },
121 { "intr0_stat", 0x30 },
122 { "intr1_stat", 0x34 },
123 { "intr0_set", 0x38 },
124 { "intr1_set", 0x3c },
128 { "srpfixtime", 0xd4 },
130 { "phy_utmi", 0xe0 },
134 static void dsps_mod_timer(struct dsps_glue *glue, int wait_ms)
136 struct musb *musb = platform_get_drvdata(glue->musb);
140 wait = msecs_to_jiffies(glue->wrp->poll_timeout);
142 wait = msecs_to_jiffies(wait_ms);
144 mod_timer(&musb->dev_timer, jiffies + wait);
148 * If no vbus irq from the PMIC is configured, we need to poll VBUS status.
150 static void dsps_mod_timer_optional(struct dsps_glue *glue)
155 dsps_mod_timer(glue, -1);
158 /* USBSS / USB AM335x */
159 #define USBSS_IRQ_STATUS 0x28
160 #define USBSS_IRQ_ENABLER 0x2c
161 #define USBSS_IRQ_CLEARR 0x30
163 #define USBSS_IRQ_PD_COMP (1 << 2)
166 * dsps_musb_enable - enable interrupts
168 static void dsps_musb_enable(struct musb *musb)
170 struct device *dev = musb->controller;
171 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
172 const struct dsps_musb_wrapper *wrp = glue->wrp;
173 void __iomem *reg_base = musb->ctrl_base;
174 u32 epmask, coremask;
176 /* Workaround: setup IRQs through both register sets. */
177 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
178 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
179 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
181 musb_writel(reg_base, wrp->epintr_set, epmask);
182 musb_writel(reg_base, wrp->coreintr_set, coremask);
184 * start polling for runtime PM active and idle,
185 * and for ID change in dual-role idle mode.
187 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)
188 dsps_mod_timer(glue, -1);
192 * dsps_musb_disable - disable HDRC and flush interrupts
194 static void dsps_musb_disable(struct musb *musb)
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;
199 void __iomem *reg_base = musb->ctrl_base;
201 musb_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
202 musb_writel(reg_base, wrp->epintr_clear,
203 wrp->txep_bitmap | wrp->rxep_bitmap);
204 del_timer_sync(&musb->dev_timer);
207 /* Caller must take musb->lock */
208 static int dsps_check_status(struct musb *musb, void *unused)
210 void __iomem *mregs = musb->mregs;
211 struct device *dev = musb->controller;
212 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
213 const struct dsps_musb_wrapper *wrp = glue->wrp;
215 int skip_session = 0;
218 del_timer(&musb->dev_timer);
221 * We poll because DSPS IP's won't expose several OTG-critical
222 * status change events (from the transceiver) otherwise.
224 devctl = musb_readb(mregs, MUSB_DEVCTL);
225 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
226 usb_otg_state_string(musb->xceiv->otg->state));
228 switch (musb->xceiv->otg->state) {
229 case OTG_STATE_A_WAIT_VRISE:
230 if (musb->port_mode == MUSB_HOST) {
231 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
232 dsps_mod_timer_optional(glue);
237 case OTG_STATE_A_WAIT_BCON:
238 /* keep VBUS on for host-only mode */
239 if (musb->port_mode == MUSB_HOST) {
240 dsps_mod_timer_optional(glue);
243 musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
247 case OTG_STATE_A_IDLE:
248 case OTG_STATE_B_IDLE:
249 if (!glue->vbus_irq) {
250 if (devctl & MUSB_DEVCTL_BDEVICE) {
251 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
254 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
258 if (musb->port_mode == MUSB_PERIPHERAL)
261 if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
262 musb_writeb(mregs, MUSB_DEVCTL,
263 MUSB_DEVCTL_SESSION);
265 dsps_mod_timer_optional(glue);
267 case OTG_STATE_A_WAIT_VFALL:
268 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
269 musb_writel(musb->ctrl_base, wrp->coreintr_set,
270 MUSB_INTR_VBUSERROR << wrp->usb_shift);
279 static void otg_timer(struct timer_list *t)
281 struct musb *musb = from_timer(musb, t, dev_timer);
282 struct device *dev = musb->controller;
286 err = pm_runtime_get(dev);
287 if ((err != -EINPROGRESS) && err < 0) {
288 dev_err(dev, "Poll could not pm_runtime_get: %i\n", err);
289 pm_runtime_put_noidle(dev);
294 spin_lock_irqsave(&musb->lock, flags);
295 err = musb_queue_resume_work(musb, dsps_check_status, NULL);
297 dev_err(dev, "%s resume work: %i\n", __func__, err);
298 spin_unlock_irqrestore(&musb->lock, flags);
299 pm_runtime_mark_last_busy(dev);
300 pm_runtime_put_autosuspend(dev);
303 static void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
306 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
307 const struct dsps_musb_wrapper *wrp = glue->wrp;
309 /* musb->lock might already been held */
310 epintr = (1 << epnum) << wrp->rxep_shift;
311 musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
314 static irqreturn_t dsps_interrupt(int irq, void *hci)
316 struct musb *musb = hci;
317 void __iomem *reg_base = musb->ctrl_base;
318 struct device *dev = musb->controller;
319 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
320 const struct dsps_musb_wrapper *wrp = glue->wrp;
322 irqreturn_t ret = IRQ_NONE;
325 spin_lock_irqsave(&musb->lock, flags);
327 /* Get endpoint interrupts */
328 epintr = musb_readl(reg_base, wrp->epintr_status);
329 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
330 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
333 musb_writel(reg_base, wrp->epintr_status, epintr);
335 /* Get usb core interrupts */
336 usbintr = musb_readl(reg_base, wrp->coreintr_status);
337 if (!usbintr && !epintr)
340 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
342 musb_writel(reg_base, wrp->coreintr_status, usbintr);
344 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
347 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
348 int drvvbus = musb_readl(reg_base, wrp->status);
349 void __iomem *mregs = musb->mregs;
350 u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
353 err = musb->int_usb & MUSB_INTR_VBUSERROR;
356 * The Mentor core doesn't debounce VBUS as needed
357 * to cope with device connect current spikes. This
358 * means it's not uncommon for bus-powered devices
359 * to get VBUS errors during enumeration.
361 * This is a workaround, but newer RTL from Mentor
362 * seems to allow a better one: "re"-starting sessions
363 * without waiting for VBUS to stop registering in
366 musb->int_usb &= ~MUSB_INTR_VBUSERROR;
367 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
368 dsps_mod_timer_optional(glue);
369 WARNING("VBUS error workaround (delay coming)\n");
370 } else if (drvvbus) {
372 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
373 dsps_mod_timer_optional(glue);
377 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
380 /* NOTE: this must complete power-on within 100 ms. */
381 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
382 drvvbus ? "on" : "off",
383 usb_otg_state_string(musb->xceiv->otg->state),
389 if (musb->int_tx || musb->int_rx || musb->int_usb)
390 ret |= musb_interrupt(musb);
392 /* Poll for ID change and connect */
393 switch (musb->xceiv->otg->state) {
394 case OTG_STATE_B_IDLE:
395 case OTG_STATE_A_WAIT_BCON:
396 dsps_mod_timer_optional(glue);
403 spin_unlock_irqrestore(&musb->lock, flags);
408 static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
413 sprintf(buf, "%s.dsps", dev_name(musb->controller));
414 root = debugfs_create_dir(buf, NULL);
415 glue->dbgfs_root = root;
417 glue->regset.regs = dsps_musb_regs;
418 glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
419 glue->regset.base = musb->ctrl_base;
421 debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
425 static int dsps_musb_init(struct musb *musb)
427 struct device *dev = musb->controller;
428 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
429 struct platform_device *parent = to_platform_device(dev->parent);
430 const struct dsps_musb_wrapper *wrp = glue->wrp;
431 void __iomem *reg_base;
436 r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
437 reg_base = devm_ioremap_resource(dev, r);
438 if (IS_ERR(reg_base))
439 return PTR_ERR(reg_base);
440 musb->ctrl_base = reg_base;
442 /* NOP driver needs change if supporting dual instance */
443 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
444 if (IS_ERR(musb->xceiv))
445 return PTR_ERR(musb->xceiv);
447 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
449 /* Returns zero if e.g. not clocked */
450 rev = musb_readl(reg_base, wrp->revision);
454 if (IS_ERR(musb->phy)) {
457 ret = phy_init(musb->phy);
460 ret = phy_power_on(musb->phy);
467 timer_setup(&musb->dev_timer, otg_timer, 0);
470 musb_writel(reg_base, wrp->control, (1 << wrp->reset));
472 musb->isr = dsps_interrupt;
474 /* reset the otgdisable bit, needed for host mode to work */
475 val = musb_readl(reg_base, wrp->phy_utmi);
476 val &= ~(1 << wrp->otg_disable);
477 musb_writel(musb->ctrl_base, wrp->phy_utmi, val);
480 * Check whether the dsps version has babble control enabled.
481 * In latest silicon revision the babble control logic is enabled.
482 * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
485 val = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
486 if (val & MUSB_BABBLE_RCV_DISABLE) {
487 glue->sw_babble_enabled = true;
488 val |= MUSB_BABBLE_SW_SESSION_CTRL;
489 musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
492 dsps_mod_timer(glue, -1);
494 return dsps_musb_dbg_init(musb, glue);
497 static int dsps_musb_exit(struct musb *musb)
499 struct device *dev = musb->controller;
500 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
502 del_timer_sync(&musb->dev_timer);
503 phy_power_off(musb->phy);
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 = musb_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 musb_writel(ctrl_base, wrp->mode, reg);
532 musb_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 musb_writel(ctrl_base, wrp->mode, reg);
547 musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
550 dev_err(glue->dev, "unsupported mode %d\n", mode);
557 static bool dsps_sw_babble_control(struct musb *musb)
560 bool session_restart = false;
562 babble_ctl = musb_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 = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
580 babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE;
581 musb_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 = musb_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_recover(struct musb *musb)
610 struct device *dev = musb->controller;
611 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
612 int session_restart = 0;
614 if (glue->sw_babble_enabled)
615 session_restart = dsps_sw_babble_control(musb);
619 return session_restart ? 0 : -EPIPE;
622 /* Similar to am35x, dm81xx support only 32-bit read operation */
623 static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
625 void __iomem *fifo = hw_ep->fifo;
628 ioread32_rep(fifo, dst, len >> 2);
633 /* Read any remaining 1 to 3 bytes */
635 u32 val = musb_readl(fifo, 0);
636 memcpy(dst, &val, len);
640 #ifdef CONFIG_USB_TI_CPPI41_DMA
641 static void dsps_dma_controller_callback(struct dma_controller *c)
643 struct musb *musb = c->musb;
644 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
645 void __iomem *usbss_base = glue->usbss_base;
648 status = musb_readl(usbss_base, USBSS_IRQ_STATUS);
649 if (status & USBSS_IRQ_PD_COMP)
650 musb_writel(usbss_base, USBSS_IRQ_STATUS, USBSS_IRQ_PD_COMP);
653 static struct dma_controller *
654 dsps_dma_controller_create(struct musb *musb, void __iomem *base)
656 struct dma_controller *controller;
657 struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
658 void __iomem *usbss_base = glue->usbss_base;
660 controller = cppi41_dma_controller_create(musb, base);
661 if (IS_ERR_OR_NULL(controller))
664 musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
665 controller->dma_callback = dsps_dma_controller_callback;
670 #ifdef CONFIG_PM_SLEEP
671 static void dsps_dma_controller_suspend(struct dsps_glue *glue)
673 void __iomem *usbss_base = glue->usbss_base;
675 musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
678 static void dsps_dma_controller_resume(struct dsps_glue *glue)
680 void __iomem *usbss_base = glue->usbss_base;
682 musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
685 #else /* CONFIG_USB_TI_CPPI41_DMA */
686 #ifdef CONFIG_PM_SLEEP
687 static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
688 static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
690 #endif /* CONFIG_USB_TI_CPPI41_DMA */
692 static struct musb_platform_ops dsps_ops = {
693 .quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
694 .init = dsps_musb_init,
695 .exit = dsps_musb_exit,
697 #ifdef CONFIG_USB_TI_CPPI41_DMA
698 .dma_init = dsps_dma_controller_create,
699 .dma_exit = cppi41_dma_controller_destroy,
701 .enable = dsps_musb_enable,
702 .disable = dsps_musb_disable,
704 .set_mode = dsps_musb_set_mode,
705 .recover = dsps_musb_recover,
706 .clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
709 static u64 musb_dmamask = DMA_BIT_MASK(32);
711 static int get_int_prop(struct device_node *dn, const char *s)
716 ret = of_property_read_u32(dn, s, &val);
722 static int dsps_create_musb_pdev(struct dsps_glue *glue,
723 struct platform_device *parent)
725 struct musb_hdrc_platform_data pdata;
726 struct resource resources[2];
727 struct resource *res;
728 struct device *dev = &parent->dev;
729 struct musb_hdrc_config *config;
730 struct platform_device *musb;
731 struct device_node *dn = parent->dev.of_node;
734 memset(resources, 0, sizeof(resources));
735 res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
737 dev_err(dev, "failed to get memory.\n");
742 res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc");
744 dev_err(dev, "failed to get irq.\n");
749 /* allocate the child platform device */
750 musb = platform_device_alloc("musb-hdrc",
751 (resources[0].start & 0xFFF) == 0x400 ? 0 : 1);
753 dev_err(dev, "failed to allocate musb device\n");
757 musb->dev.parent = dev;
758 musb->dev.dma_mask = &musb_dmamask;
759 musb->dev.coherent_dma_mask = musb_dmamask;
760 device_set_of_node_from_dev(&musb->dev, &parent->dev);
764 ret = platform_device_add_resources(musb, resources,
765 ARRAY_SIZE(resources));
767 dev_err(dev, "failed to add resources\n");
771 config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
776 pdata.config = config;
777 pdata.platform_ops = &dsps_ops;
779 config->num_eps = get_int_prop(dn, "mentor,num-eps");
780 config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
781 config->host_port_deassert_reset_at_resume = 1;
782 pdata.mode = musb_get_mode(dev);
783 /* DT keeps this entry in mA, musb expects it as per USB spec */
784 pdata.power = get_int_prop(dn, "mentor,power") / 2;
786 ret = of_property_read_u32(dn, "mentor,multipoint", &val);
788 config->multipoint = true;
790 config->maximum_speed = usb_get_maximum_speed(&parent->dev);
791 switch (config->maximum_speed) {
795 case USB_SPEED_SUPER:
796 dev_warn(dev, "ignore incorrect maximum_speed "
797 "(super-speed) setting in dts");
800 config->maximum_speed = USB_SPEED_HIGH;
803 ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
805 dev_err(dev, "failed to add platform_data\n");
809 ret = platform_device_add(musb);
811 dev_err(dev, "failed to register musb device\n");
817 platform_device_put(musb);
821 static irqreturn_t dsps_vbus_threaded_irq(int irq, void *priv)
823 struct dsps_glue *glue = priv;
824 struct musb *musb = platform_get_drvdata(glue->musb);
829 dev_dbg(glue->dev, "VBUS interrupt\n");
830 dsps_mod_timer(glue, 0);
835 static int dsps_setup_optional_vbus_irq(struct platform_device *pdev,
836 struct dsps_glue *glue)
840 glue->vbus_irq = platform_get_irq_byname(pdev, "vbus");
841 if (glue->vbus_irq == -EPROBE_DEFER)
842 return -EPROBE_DEFER;
844 if (glue->vbus_irq <= 0) {
849 error = devm_request_threaded_irq(glue->dev, glue->vbus_irq,
850 NULL, dsps_vbus_threaded_irq,
857 dev_dbg(glue->dev, "VBUS irq %i configured\n", glue->vbus_irq);
862 static int dsps_probe(struct platform_device *pdev)
864 const struct of_device_id *match;
865 const struct dsps_musb_wrapper *wrp;
866 struct dsps_glue *glue;
869 if (!strcmp(pdev->name, "musb-hdrc"))
872 match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
874 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
879 if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
880 dsps_ops.read_fifo = dsps_read_fifo32;
883 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
887 glue->dev = &pdev->dev;
889 glue->usbss_base = of_iomap(pdev->dev.parent->of_node, 0);
890 if (!glue->usbss_base)
893 if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
894 ret = dsps_setup_optional_vbus_irq(pdev, glue);
899 platform_set_drvdata(pdev, glue);
900 pm_runtime_enable(&pdev->dev);
901 ret = dsps_create_musb_pdev(glue, pdev);
908 pm_runtime_disable(&pdev->dev);
910 iounmap(glue->usbss_base);
914 static int dsps_remove(struct platform_device *pdev)
916 struct dsps_glue *glue = platform_get_drvdata(pdev);
918 platform_device_unregister(glue->musb);
920 pm_runtime_disable(&pdev->dev);
921 iounmap(glue->usbss_base);
926 static const struct dsps_musb_wrapper am33xx_driver_data = {
931 .epintr_clear = 0x40,
932 .epintr_status = 0x30,
933 .coreintr_set = 0x3c,
934 .coreintr_clear = 0x44,
935 .coreintr_status = 0x34,
946 .usb_bitmap = (0x1ff << 0),
950 .txep_bitmap = (0xffff << 0),
953 .rxep_bitmap = (0xfffe << 16),
954 .poll_timeout = 2000, /* ms */
957 static const struct of_device_id musb_dsps_of_match[] = {
958 { .compatible = "ti,musb-am33xx",
959 .data = &am33xx_driver_data, },
960 { .compatible = "ti,musb-dm816",
961 .data = &am33xx_driver_data, },
964 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
966 #ifdef CONFIG_PM_SLEEP
967 static int dsps_suspend(struct device *dev)
969 struct dsps_glue *glue = dev_get_drvdata(dev);
970 const struct dsps_musb_wrapper *wrp = glue->wrp;
971 struct musb *musb = platform_get_drvdata(glue->musb);
976 /* This can happen if the musb device is in -EPROBE_DEFER */
979 ret = pm_runtime_get_sync(dev);
981 pm_runtime_put_noidle(dev);
985 del_timer_sync(&musb->dev_timer);
987 mbase = musb->ctrl_base;
988 glue->context.control = musb_readl(mbase, wrp->control);
989 glue->context.epintr = musb_readl(mbase, wrp->epintr_set);
990 glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set);
991 glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi);
992 glue->context.mode = musb_readl(mbase, wrp->mode);
993 glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
994 glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
996 dsps_dma_controller_suspend(glue);
1001 static int dsps_resume(struct device *dev)
1003 struct dsps_glue *glue = dev_get_drvdata(dev);
1004 const struct dsps_musb_wrapper *wrp = glue->wrp;
1005 struct musb *musb = platform_get_drvdata(glue->musb);
1006 void __iomem *mbase;
1011 dsps_dma_controller_resume(glue);
1013 mbase = musb->ctrl_base;
1014 musb_writel(mbase, wrp->control, glue->context.control);
1015 musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
1016 musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr);
1017 musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi);
1018 musb_writel(mbase, wrp->mode, glue->context.mode);
1019 musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
1020 musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
1021 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
1022 musb->port_mode == MUSB_OTG)
1023 dsps_mod_timer(glue, -1);
1025 pm_runtime_put(dev);
1031 static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
1033 static struct platform_driver dsps_usbss_driver = {
1034 .probe = dsps_probe,
1035 .remove = dsps_remove,
1037 .name = "musb-dsps",
1039 .of_match_table = musb_dsps_of_match,
1043 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
1046 MODULE_LICENSE("GPL v2");
1048 module_platform_driver(dsps_usbss_driver);