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-rw-r--r--drivers/usb/musb/musb_dsps.c1052
1 files changed, 1052 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
new file mode 100644
index 000000000..f75cde0f2
--- /dev/null
+++ b/drivers/usb/musb/musb_dsps.c
@@ -0,0 +1,1052 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Texas Instruments DSPS platforms "glue layer"
+ *
+ * Copyright (C) 2012, by Texas Instruments
+ *
+ * Based on the am35x "glue layer" code.
+ *
+ * This file is part of the Inventra Controller Driver for Linux.
+ *
+ * musb_dsps.c will be a common file for all the TI DSPS platforms
+ * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
+ * For now only ti81x is using this and in future davinci.c, am35x.c
+ * da8xx.c would be merged to this file after testing.
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <linux/usb/usb_phy_generic.h>
+#include <linux/platform_data/usb-omap.h>
+#include <linux/sizes.h>
+
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/usb/of.h>
+
+#include <linux/debugfs.h>
+
+#include "musb_core.h"
+
+static const struct of_device_id musb_dsps_of_match[];
+
+/*
+ * DSPS musb wrapper register offset.
+ * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
+ * musb ips.
+ */
+struct dsps_musb_wrapper {
+ u16 revision;
+ u16 control;
+ u16 status;
+ u16 epintr_set;
+ u16 epintr_clear;
+ u16 epintr_status;
+ u16 coreintr_set;
+ u16 coreintr_clear;
+ u16 coreintr_status;
+ u16 phy_utmi;
+ u16 mode;
+ u16 tx_mode;
+ u16 rx_mode;
+
+ /* bit positions for control */
+ unsigned reset:5;
+
+ /* bit positions for interrupt */
+ unsigned usb_shift:5;
+ u32 usb_mask;
+ u32 usb_bitmap;
+ unsigned drvvbus:5;
+
+ unsigned txep_shift:5;
+ u32 txep_mask;
+ u32 txep_bitmap;
+
+ unsigned rxep_shift:5;
+ u32 rxep_mask;
+ u32 rxep_bitmap;
+
+ /* bit positions for phy_utmi */
+ unsigned otg_disable:5;
+
+ /* bit positions for mode */
+ unsigned iddig:5;
+ unsigned iddig_mux:5;
+ /* miscellaneous stuff */
+ unsigned poll_timeout;
+};
+
+/*
+ * register shadow for suspend
+ */
+struct dsps_context {
+ u32 control;
+ u32 epintr;
+ u32 coreintr;
+ u32 phy_utmi;
+ u32 mode;
+ u32 tx_mode;
+ u32 rx_mode;
+};
+
+/*
+ * DSPS glue structure.
+ */
+struct dsps_glue {
+ struct device *dev;
+ struct platform_device *musb; /* child musb pdev */
+ const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
+ int vbus_irq; /* optional vbus irq */
+ unsigned long last_timer; /* last timer data for each instance */
+ bool sw_babble_enabled;
+ void __iomem *usbss_base;
+
+ struct dsps_context context;
+ struct debugfs_regset32 regset;
+ struct dentry *dbgfs_root;
+};
+
+static const struct debugfs_reg32 dsps_musb_regs[] = {
+ { "revision", 0x00 },
+ { "control", 0x14 },
+ { "status", 0x18 },
+ { "eoi", 0x24 },
+ { "intr0_stat", 0x30 },
+ { "intr1_stat", 0x34 },
+ { "intr0_set", 0x38 },
+ { "intr1_set", 0x3c },
+ { "txmode", 0x70 },
+ { "rxmode", 0x74 },
+ { "autoreq", 0xd0 },
+ { "srpfixtime", 0xd4 },
+ { "tdown", 0xd8 },
+ { "phy_utmi", 0xe0 },
+ { "mode", 0xe8 },
+};
+
+static void dsps_mod_timer(struct dsps_glue *glue, int wait_ms)
+{
+ struct musb *musb = platform_get_drvdata(glue->musb);
+ int wait;
+
+ if (wait_ms < 0)
+ wait = msecs_to_jiffies(glue->wrp->poll_timeout);
+ else
+ wait = msecs_to_jiffies(wait_ms);
+
+ mod_timer(&musb->dev_timer, jiffies + wait);
+}
+
+/*
+ * If no vbus irq from the PMIC is configured, we need to poll VBUS status.
+ */
+static void dsps_mod_timer_optional(struct dsps_glue *glue)
+{
+ if (glue->vbus_irq)
+ return;
+
+ dsps_mod_timer(glue, -1);
+}
+
+/* USBSS / USB AM335x */
+#define USBSS_IRQ_STATUS 0x28
+#define USBSS_IRQ_ENABLER 0x2c
+#define USBSS_IRQ_CLEARR 0x30
+
+#define USBSS_IRQ_PD_COMP (1 << 2)
+
+/*
+ * dsps_musb_enable - enable interrupts
+ */
+static void dsps_musb_enable(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ void __iomem *reg_base = musb->ctrl_base;
+ u32 epmask, coremask;
+
+ /* Workaround: setup IRQs through both register sets. */
+ epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
+ ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
+ coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
+
+ musb_writel(reg_base, wrp->epintr_set, epmask);
+ musb_writel(reg_base, wrp->coreintr_set, coremask);
+ /*
+ * start polling for runtime PM active and idle,
+ * and for ID change in dual-role idle mode.
+ */
+ if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)
+ dsps_mod_timer(glue, -1);
+}
+
+/*
+ * dsps_musb_disable - disable HDRC and flush interrupts
+ */
+static void dsps_musb_disable(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ void __iomem *reg_base = musb->ctrl_base;
+
+ musb_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
+ musb_writel(reg_base, wrp->epintr_clear,
+ wrp->txep_bitmap | wrp->rxep_bitmap);
+ del_timer_sync(&musb->dev_timer);
+}
+
+/* Caller must take musb->lock */
+static int dsps_check_status(struct musb *musb, void *unused)
+{
+ void __iomem *mregs = musb->mregs;
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ u8 devctl;
+ int skip_session = 0;
+
+ if (glue->vbus_irq)
+ del_timer(&musb->dev_timer);
+
+ /*
+ * We poll because DSPS IP's won't expose several OTG-critical
+ * status change events (from the transceiver) otherwise.
+ */
+ devctl = musb_readb(mregs, MUSB_DEVCTL);
+ dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
+ usb_otg_state_string(musb->xceiv->otg->state));
+
+ switch (musb->xceiv->otg->state) {
+ case OTG_STATE_A_WAIT_VRISE:
+ if (musb->port_mode == MUSB_HOST) {
+ musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
+ dsps_mod_timer_optional(glue);
+ break;
+ }
+ fallthrough;
+
+ case OTG_STATE_A_WAIT_BCON:
+ /* keep VBUS on for host-only mode */
+ if (musb->port_mode == MUSB_HOST) {
+ dsps_mod_timer_optional(glue);
+ break;
+ }
+ musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
+ skip_session = 1;
+ fallthrough;
+
+ case OTG_STATE_A_IDLE:
+ case OTG_STATE_B_IDLE:
+ if (!glue->vbus_irq) {
+ if (devctl & MUSB_DEVCTL_BDEVICE) {
+ musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+ MUSB_DEV_MODE(musb);
+ } else {
+ musb->xceiv->otg->state = OTG_STATE_A_IDLE;
+ MUSB_HST_MODE(musb);
+ }
+
+ if (musb->port_mode == MUSB_PERIPHERAL)
+ skip_session = 1;
+
+ if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
+ musb_writeb(mregs, MUSB_DEVCTL,
+ MUSB_DEVCTL_SESSION);
+ }
+ dsps_mod_timer_optional(glue);
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
+ musb_writel(musb->ctrl_base, wrp->coreintr_set,
+ MUSB_INTR_VBUSERROR << wrp->usb_shift);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void otg_timer(struct timer_list *t)
+{
+ struct musb *musb = from_timer(musb, t, dev_timer);
+ struct device *dev = musb->controller;
+ unsigned long flags;
+ int err;
+
+ err = pm_runtime_get(dev);
+ if ((err != -EINPROGRESS) && err < 0) {
+ dev_err(dev, "Poll could not pm_runtime_get: %i\n", err);
+ pm_runtime_put_noidle(dev);
+
+ return;
+ }
+
+ spin_lock_irqsave(&musb->lock, flags);
+ err = musb_queue_resume_work(musb, dsps_check_status, NULL);
+ if (err < 0)
+ dev_err(dev, "%s resume work: %i\n", __func__, err);
+ spin_unlock_irqrestore(&musb->lock, flags);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+}
+
+static void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
+{
+ u32 epintr;
+ struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+
+ /* musb->lock might already been held */
+ epintr = (1 << epnum) << wrp->rxep_shift;
+ musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
+}
+
+static irqreturn_t dsps_interrupt(int irq, void *hci)
+{
+ struct musb *musb = hci;
+ void __iomem *reg_base = musb->ctrl_base;
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ unsigned long flags;
+ irqreturn_t ret = IRQ_NONE;
+ u32 epintr, usbintr;
+
+ spin_lock_irqsave(&musb->lock, flags);
+
+ /* Get endpoint interrupts */
+ epintr = musb_readl(reg_base, wrp->epintr_status);
+ musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
+ musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
+
+ if (epintr)
+ musb_writel(reg_base, wrp->epintr_status, epintr);
+
+ /* Get usb core interrupts */
+ usbintr = musb_readl(reg_base, wrp->coreintr_status);
+ if (!usbintr && !epintr)
+ goto out;
+
+ musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
+ if (usbintr)
+ musb_writel(reg_base, wrp->coreintr_status, usbintr);
+
+ dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
+ usbintr, epintr);
+
+ if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
+ int drvvbus = musb_readl(reg_base, wrp->status);
+ void __iomem *mregs = musb->mregs;
+ u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
+ int err;
+
+ err = musb->int_usb & MUSB_INTR_VBUSERROR;
+ if (err) {
+ /*
+ * The Mentor core doesn't debounce VBUS as needed
+ * to cope with device connect current spikes. This
+ * means it's not uncommon for bus-powered devices
+ * to get VBUS errors during enumeration.
+ *
+ * This is a workaround, but newer RTL from Mentor
+ * seems to allow a better one: "re"-starting sessions
+ * without waiting for VBUS to stop registering in
+ * devctl.
+ */
+ musb->int_usb &= ~MUSB_INTR_VBUSERROR;
+ musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
+ dsps_mod_timer_optional(glue);
+ WARNING("VBUS error workaround (delay coming)\n");
+ } else if (drvvbus) {
+ MUSB_HST_MODE(musb);
+ musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
+ dsps_mod_timer_optional(glue);
+ } else {
+ musb->is_active = 0;
+ MUSB_DEV_MODE(musb);
+ musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+ }
+
+ /* NOTE: this must complete power-on within 100 ms. */
+ dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
+ drvvbus ? "on" : "off",
+ usb_otg_state_string(musb->xceiv->otg->state),
+ err ? " ERROR" : "",
+ devctl);
+ ret = IRQ_HANDLED;
+ }
+
+ if (musb->int_tx || musb->int_rx || musb->int_usb)
+ ret |= musb_interrupt(musb);
+
+ /* Poll for ID change and connect */
+ switch (musb->xceiv->otg->state) {
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_A_WAIT_BCON:
+ dsps_mod_timer_optional(glue);
+ break;
+ default:
+ break;
+ }
+
+out:
+ spin_unlock_irqrestore(&musb->lock, flags);
+
+ return ret;
+}
+
+static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
+{
+ struct dentry *root;
+ char buf[128];
+
+ sprintf(buf, "%s.dsps", dev_name(musb->controller));
+ root = debugfs_create_dir(buf, usb_debug_root);
+ glue->dbgfs_root = root;
+
+ glue->regset.regs = dsps_musb_regs;
+ glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
+ glue->regset.base = musb->ctrl_base;
+
+ debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
+ return 0;
+}
+
+static int dsps_musb_init(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ struct platform_device *parent = to_platform_device(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ void __iomem *reg_base;
+ struct resource *r;
+ u32 rev, val;
+ int ret;
+
+ r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
+ reg_base = devm_ioremap_resource(dev, r);
+ if (IS_ERR(reg_base))
+ return PTR_ERR(reg_base);
+ musb->ctrl_base = reg_base;
+
+ /* NOP driver needs change if supporting dual instance */
+ musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
+ if (IS_ERR(musb->xceiv))
+ return PTR_ERR(musb->xceiv);
+
+ musb->phy = devm_phy_get(dev->parent, "usb2-phy");
+
+ /* Returns zero if e.g. not clocked */
+ rev = musb_readl(reg_base, wrp->revision);
+ if (!rev)
+ return -ENODEV;
+
+ if (IS_ERR(musb->phy)) {
+ musb->phy = NULL;
+ } else {
+ ret = phy_init(musb->phy);
+ if (ret < 0)
+ return ret;
+ ret = phy_power_on(musb->phy);
+ if (ret) {
+ phy_exit(musb->phy);
+ return ret;
+ }
+ }
+
+ timer_setup(&musb->dev_timer, otg_timer, 0);
+
+ /* Reset the musb */
+ musb_writel(reg_base, wrp->control, (1 << wrp->reset));
+
+ musb->isr = dsps_interrupt;
+
+ /* reset the otgdisable bit, needed for host mode to work */
+ val = musb_readl(reg_base, wrp->phy_utmi);
+ val &= ~(1 << wrp->otg_disable);
+ musb_writel(musb->ctrl_base, wrp->phy_utmi, val);
+
+ /*
+ * Check whether the dsps version has babble control enabled.
+ * In latest silicon revision the babble control logic is enabled.
+ * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control
+ * logic enabled.
+ */
+ val = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
+ if (val & MUSB_BABBLE_RCV_DISABLE) {
+ glue->sw_babble_enabled = true;
+ val |= MUSB_BABBLE_SW_SESSION_CTRL;
+ musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
+ }
+
+ dsps_mod_timer(glue, -1);
+
+ return dsps_musb_dbg_init(musb, glue);
+}
+
+static int dsps_musb_exit(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+
+ del_timer_sync(&musb->dev_timer);
+ phy_power_off(musb->phy);
+ phy_exit(musb->phy);
+ debugfs_remove_recursive(glue->dbgfs_root);
+
+ return 0;
+}
+
+static int dsps_musb_set_mode(struct musb *musb, u8 mode)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ void __iomem *ctrl_base = musb->ctrl_base;
+ u32 reg;
+
+ reg = musb_readl(ctrl_base, wrp->mode);
+
+ switch (mode) {
+ case MUSB_HOST:
+ reg &= ~(1 << wrp->iddig);
+
+ /*
+ * if we're setting mode to host-only or device-only, we're
+ * going to ignore whatever the PHY sends us and just force
+ * ID pin status by SW
+ */
+ reg |= (1 << wrp->iddig_mux);
+
+ musb_writel(ctrl_base, wrp->mode, reg);
+ musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
+ break;
+ case MUSB_PERIPHERAL:
+ reg |= (1 << wrp->iddig);
+
+ /*
+ * if we're setting mode to host-only or device-only, we're
+ * going to ignore whatever the PHY sends us and just force
+ * ID pin status by SW
+ */
+ reg |= (1 << wrp->iddig_mux);
+
+ musb_writel(ctrl_base, wrp->mode, reg);
+ break;
+ case MUSB_OTG:
+ musb_writel(ctrl_base, wrp->phy_utmi, 0x02);
+ break;
+ default:
+ dev_err(glue->dev, "unsupported mode %d\n", mode);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static bool dsps_sw_babble_control(struct musb *musb)
+{
+ u8 babble_ctl;
+ bool session_restart = false;
+
+ babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
+ dev_dbg(musb->controller, "babble: MUSB_BABBLE_CTL value %x\n",
+ babble_ctl);
+ /*
+ * check line monitor flag to check whether babble is
+ * due to noise
+ */
+ dev_dbg(musb->controller, "STUCK_J is %s\n",
+ babble_ctl & MUSB_BABBLE_STUCK_J ? "set" : "reset");
+
+ if (babble_ctl & MUSB_BABBLE_STUCK_J) {
+ int timeout = 10;
+
+ /*
+ * babble is due to noise, then set transmit idle (d7 bit)
+ * to resume normal operation
+ */
+ babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
+ babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE;
+ musb_writeb(musb->mregs, MUSB_BABBLE_CTL, babble_ctl);
+
+ /* wait till line monitor flag cleared */
+ dev_dbg(musb->controller, "Set TXIDLE, wait J to clear\n");
+ do {
+ babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL);
+ udelay(1);
+ } while ((babble_ctl & MUSB_BABBLE_STUCK_J) && timeout--);
+
+ /* check whether stuck_at_j bit cleared */
+ if (babble_ctl & MUSB_BABBLE_STUCK_J) {
+ /*
+ * real babble condition has occurred
+ * restart the controller to start the
+ * session again
+ */
+ dev_dbg(musb->controller, "J not cleared, misc (%x)\n",
+ babble_ctl);
+ session_restart = true;
+ }
+ } else {
+ session_restart = true;
+ }
+
+ return session_restart;
+}
+
+static int dsps_musb_recover(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ int session_restart = 0;
+
+ if (glue->sw_babble_enabled)
+ session_restart = dsps_sw_babble_control(musb);
+ else
+ session_restart = 1;
+
+ return session_restart ? 0 : -EPIPE;
+}
+
+/* Similar to am35x, dm81xx support only 32-bit read operation */
+static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
+{
+ void __iomem *fifo = hw_ep->fifo;
+
+ if (len >= 4) {
+ ioread32_rep(fifo, dst, len >> 2);
+ dst += len & ~0x03;
+ len &= 0x03;
+ }
+
+ /* Read any remaining 1 to 3 bytes */
+ if (len > 0) {
+ u32 val = musb_readl(fifo, 0);
+ memcpy(dst, &val, len);
+ }
+}
+
+#ifdef CONFIG_USB_TI_CPPI41_DMA
+static void dsps_dma_controller_callback(struct dma_controller *c)
+{
+ struct musb *musb = c->musb;
+ struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+ void __iomem *usbss_base = glue->usbss_base;
+ u32 status;
+
+ status = musb_readl(usbss_base, USBSS_IRQ_STATUS);
+ if (status & USBSS_IRQ_PD_COMP)
+ musb_writel(usbss_base, USBSS_IRQ_STATUS, USBSS_IRQ_PD_COMP);
+}
+
+static struct dma_controller *
+dsps_dma_controller_create(struct musb *musb, void __iomem *base)
+{
+ struct dma_controller *controller;
+ struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+ void __iomem *usbss_base = glue->usbss_base;
+
+ controller = cppi41_dma_controller_create(musb, base);
+ if (IS_ERR_OR_NULL(controller))
+ return controller;
+
+ musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
+ controller->dma_callback = dsps_dma_controller_callback;
+
+ return controller;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void dsps_dma_controller_suspend(struct dsps_glue *glue)
+{
+ void __iomem *usbss_base = glue->usbss_base;
+
+ musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
+}
+
+static void dsps_dma_controller_resume(struct dsps_glue *glue)
+{
+ void __iomem *usbss_base = glue->usbss_base;
+
+ musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
+}
+#endif
+#else /* CONFIG_USB_TI_CPPI41_DMA */
+#ifdef CONFIG_PM_SLEEP
+static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
+static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
+#endif
+#endif /* CONFIG_USB_TI_CPPI41_DMA */
+
+static struct musb_platform_ops dsps_ops = {
+ .quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
+ .init = dsps_musb_init,
+ .exit = dsps_musb_exit,
+
+#ifdef CONFIG_USB_TI_CPPI41_DMA
+ .dma_init = dsps_dma_controller_create,
+ .dma_exit = cppi41_dma_controller_destroy,
+#endif
+ .enable = dsps_musb_enable,
+ .disable = dsps_musb_disable,
+
+ .set_mode = dsps_musb_set_mode,
+ .recover = dsps_musb_recover,
+ .clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
+};
+
+static u64 musb_dmamask = DMA_BIT_MASK(32);
+
+static int get_int_prop(struct device_node *dn, const char *s)
+{
+ int ret;
+ u32 val;
+
+ ret = of_property_read_u32(dn, s, &val);
+ if (ret)
+ return 0;
+ return val;
+}
+
+static int dsps_create_musb_pdev(struct dsps_glue *glue,
+ struct platform_device *parent)
+{
+ struct musb_hdrc_platform_data pdata;
+ struct resource resources[2];
+ struct resource *res;
+ struct device *dev = &parent->dev;
+ struct musb_hdrc_config *config;
+ struct platform_device *musb;
+ struct device_node *dn = parent->dev.of_node;
+ int ret, val;
+
+ memset(resources, 0, sizeof(resources));
+ res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
+ if (!res) {
+ dev_err(dev, "failed to get memory.\n");
+ return -EINVAL;
+ }
+ resources[0] = *res;
+
+ ret = platform_get_irq_byname(parent, "mc");
+ if (ret < 0)
+ return ret;
+
+ resources[1].start = ret;
+ resources[1].end = ret;
+ resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(ret);
+ resources[1].name = "mc";
+
+ /* allocate the child platform device */
+ musb = platform_device_alloc("musb-hdrc",
+ (resources[0].start & 0xFFF) == 0x400 ? 0 : 1);
+ if (!musb) {
+ dev_err(dev, "failed to allocate musb device\n");
+ return -ENOMEM;
+ }
+
+ musb->dev.parent = dev;
+ musb->dev.dma_mask = &musb_dmamask;
+ musb->dev.coherent_dma_mask = musb_dmamask;
+ device_set_of_node_from_dev(&musb->dev, &parent->dev);
+
+ glue->musb = musb;
+
+ ret = platform_device_add_resources(musb, resources,
+ ARRAY_SIZE(resources));
+ if (ret) {
+ dev_err(dev, "failed to add resources\n");
+ goto err;
+ }
+
+ config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
+ if (!config) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ pdata.config = config;
+ pdata.platform_ops = &dsps_ops;
+
+ config->num_eps = get_int_prop(dn, "mentor,num-eps");
+ config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
+ config->host_port_deassert_reset_at_resume = 1;
+ pdata.mode = musb_get_mode(dev);
+ /* DT keeps this entry in mA, musb expects it as per USB spec */
+ pdata.power = get_int_prop(dn, "mentor,power") / 2;
+
+ ret = of_property_read_u32(dn, "mentor,multipoint", &val);
+ if (!ret && val)
+ config->multipoint = true;
+
+ config->maximum_speed = usb_get_maximum_speed(&parent->dev);
+ switch (config->maximum_speed) {
+ case USB_SPEED_LOW:
+ case USB_SPEED_FULL:
+ break;
+ case USB_SPEED_SUPER:
+ dev_warn(dev, "ignore incorrect maximum_speed "
+ "(super-speed) setting in dts");
+ fallthrough;
+ default:
+ config->maximum_speed = USB_SPEED_HIGH;
+ }
+
+ ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
+ if (ret) {
+ dev_err(dev, "failed to add platform_data\n");
+ goto err;
+ }
+
+ ret = platform_device_add(musb);
+ if (ret) {
+ dev_err(dev, "failed to register musb device\n");
+ goto err;
+ }
+ return 0;
+
+err:
+ platform_device_put(musb);
+ return ret;
+}
+
+static irqreturn_t dsps_vbus_threaded_irq(int irq, void *priv)
+{
+ struct dsps_glue *glue = priv;
+ struct musb *musb = platform_get_drvdata(glue->musb);
+
+ if (!musb)
+ return IRQ_NONE;
+
+ dev_dbg(glue->dev, "VBUS interrupt\n");
+ dsps_mod_timer(glue, 0);
+
+ return IRQ_HANDLED;
+}
+
+static int dsps_setup_optional_vbus_irq(struct platform_device *pdev,
+ struct dsps_glue *glue)
+{
+ int error;
+
+ glue->vbus_irq = platform_get_irq_byname(pdev, "vbus");
+ if (glue->vbus_irq == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ if (glue->vbus_irq <= 0) {
+ glue->vbus_irq = 0;
+ return 0;
+ }
+
+ error = devm_request_threaded_irq(glue->dev, glue->vbus_irq,
+ NULL, dsps_vbus_threaded_irq,
+ IRQF_ONESHOT,
+ "vbus", glue);
+ if (error) {
+ glue->vbus_irq = 0;
+ return error;
+ }
+ dev_dbg(glue->dev, "VBUS irq %i configured\n", glue->vbus_irq);
+
+ return 0;
+}
+
+static int dsps_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ const struct dsps_musb_wrapper *wrp;
+ struct dsps_glue *glue;
+ int ret;
+
+ if (!strcmp(pdev->name, "musb-hdrc"))
+ return -ENODEV;
+
+ match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
+ if (!match) {
+ dev_err(&pdev->dev, "fail to get matching of_match struct\n");
+ return -EINVAL;
+ }
+ wrp = match->data;
+
+ if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
+ dsps_ops.read_fifo = dsps_read_fifo32;
+
+ /* allocate glue */
+ glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
+ if (!glue)
+ return -ENOMEM;
+
+ glue->dev = &pdev->dev;
+ glue->wrp = wrp;
+ glue->usbss_base = of_iomap(pdev->dev.parent->of_node, 0);
+ if (!glue->usbss_base)
+ return -ENXIO;
+
+ platform_set_drvdata(pdev, glue);
+ pm_runtime_enable(&pdev->dev);
+ ret = dsps_create_musb_pdev(glue, pdev);
+ if (ret)
+ goto err;
+
+ if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
+ ret = dsps_setup_optional_vbus_irq(pdev, glue);
+ if (ret)
+ goto unregister_pdev;
+ }
+
+ return 0;
+
+unregister_pdev:
+ platform_device_unregister(glue->musb);
+err:
+ pm_runtime_disable(&pdev->dev);
+ iounmap(glue->usbss_base);
+ return ret;
+}
+
+static int dsps_remove(struct platform_device *pdev)
+{
+ struct dsps_glue *glue = platform_get_drvdata(pdev);
+
+ platform_device_unregister(glue->musb);
+
+ pm_runtime_disable(&pdev->dev);
+ iounmap(glue->usbss_base);
+
+ return 0;
+}
+
+static const struct dsps_musb_wrapper am33xx_driver_data = {
+ .revision = 0x00,
+ .control = 0x14,
+ .status = 0x18,
+ .epintr_set = 0x38,
+ .epintr_clear = 0x40,
+ .epintr_status = 0x30,
+ .coreintr_set = 0x3c,
+ .coreintr_clear = 0x44,
+ .coreintr_status = 0x34,
+ .phy_utmi = 0xe0,
+ .mode = 0xe8,
+ .tx_mode = 0x70,
+ .rx_mode = 0x74,
+ .reset = 0,
+ .otg_disable = 21,
+ .iddig = 8,
+ .iddig_mux = 7,
+ .usb_shift = 0,
+ .usb_mask = 0x1ff,
+ .usb_bitmap = (0x1ff << 0),
+ .drvvbus = 8,
+ .txep_shift = 0,
+ .txep_mask = 0xffff,
+ .txep_bitmap = (0xffff << 0),
+ .rxep_shift = 16,
+ .rxep_mask = 0xfffe,
+ .rxep_bitmap = (0xfffe << 16),
+ .poll_timeout = 2000, /* ms */
+};
+
+static const struct of_device_id musb_dsps_of_match[] = {
+ { .compatible = "ti,musb-am33xx",
+ .data = &am33xx_driver_data, },
+ { .compatible = "ti,musb-dm816",
+ .data = &am33xx_driver_data, },
+ { },
+};
+MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int dsps_suspend(struct device *dev)
+{
+ struct dsps_glue *glue = dev_get_drvdata(dev);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ struct musb *musb = platform_get_drvdata(glue->musb);
+ void __iomem *mbase;
+ int ret;
+
+ if (!musb)
+ /* This can happen if the musb device is in -EPROBE_DEFER */
+ return 0;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(dev);
+ return ret;
+ }
+
+ del_timer_sync(&musb->dev_timer);
+
+ mbase = musb->ctrl_base;
+ glue->context.control = musb_readl(mbase, wrp->control);
+ glue->context.epintr = musb_readl(mbase, wrp->epintr_set);
+ glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set);
+ glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi);
+ glue->context.mode = musb_readl(mbase, wrp->mode);
+ glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
+ glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
+
+ dsps_dma_controller_suspend(glue);
+
+ return 0;
+}
+
+static int dsps_resume(struct device *dev)
+{
+ struct dsps_glue *glue = dev_get_drvdata(dev);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ struct musb *musb = platform_get_drvdata(glue->musb);
+ void __iomem *mbase;
+
+ if (!musb)
+ return 0;
+
+ dsps_dma_controller_resume(glue);
+
+ mbase = musb->ctrl_base;
+ musb_writel(mbase, wrp->control, glue->context.control);
+ musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
+ musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr);
+ musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi);
+ musb_writel(mbase, wrp->mode, glue->context.mode);
+ musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
+ musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
+ if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
+ musb->port_mode == MUSB_OTG)
+ dsps_mod_timer(glue, -1);
+
+ pm_runtime_put(dev);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
+
+static struct platform_driver dsps_usbss_driver = {
+ .probe = dsps_probe,
+ .remove = dsps_remove,
+ .driver = {
+ .name = "musb-dsps",
+ .pm = &dsps_pm_ops,
+ .of_match_table = musb_dsps_of_match,
+ },
+};
+
+MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
+MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
+MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
+MODULE_LICENSE("GPL v2");
+
+module_platform_driver(dsps_usbss_driver);