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-rw-r--r--drivers/usb/chipidea/host.c502
1 files changed, 502 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
new file mode 100644
index 0000000000..0cce192083
--- /dev/null
+++ b/drivers/usb/chipidea/host.c
@@ -0,0 +1,502 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * host.c - ChipIdea USB host controller driver
+ *
+ * Copyright (c) 2012 Intel Corporation
+ *
+ * Author: Alexander Shishkin
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/chipidea.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pinctrl/consumer.h>
+
+#include "../host/ehci.h"
+
+#include "ci.h"
+#include "bits.h"
+#include "host.h"
+
+static struct hc_driver __read_mostly ci_ehci_hc_driver;
+static int (*orig_bus_suspend)(struct usb_hcd *hcd);
+
+struct ehci_ci_priv {
+ struct regulator *reg_vbus;
+ bool enabled;
+};
+
+struct ci_hdrc_dma_aligned_buffer {
+ void *original_buffer;
+ u8 data[];
+};
+
+static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
+ struct device *dev = hcd->self.controller;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+ int ret = 0;
+ int port = HCS_N_PORTS(ehci->hcs_params);
+
+ if (priv->reg_vbus && enable != priv->enabled) {
+ if (port > 1) {
+ dev_warn(dev,
+ "Not support multi-port regulator control\n");
+ return 0;
+ }
+ if (enable)
+ ret = regulator_enable(priv->reg_vbus);
+ else
+ ret = regulator_disable(priv->reg_vbus);
+ if (ret) {
+ dev_err(dev,
+ "Failed to %s vbus regulator, ret=%d\n",
+ enable ? "enable" : "disable", ret);
+ return ret;
+ }
+ priv->enabled = enable;
+ }
+
+ if (ci->platdata->flags & CI_HDRC_PHY_VBUS_CONTROL) {
+ if (enable)
+ usb_phy_vbus_on(ci->usb_phy);
+ else
+ usb_phy_vbus_off(ci->usb_phy);
+ }
+
+ if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
+ /*
+ * Marvell 28nm HSIC PHY requires forcing the port to HS mode.
+ * As HSIC is always HS, this should be safe for others.
+ */
+ hw_port_test_set(ci, 5);
+ hw_port_test_set(ci, 0);
+ }
+ return 0;
+};
+
+static int ehci_ci_reset(struct usb_hcd *hcd)
+{
+ struct device *dev = hcd->self.controller;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ int ret;
+
+ ret = ehci_setup(hcd);
+ if (ret)
+ return ret;
+
+ ehci->need_io_watchdog = 0;
+
+ if (ci->platdata->notify_event) {
+ ret = ci->platdata->notify_event(ci,
+ CI_HDRC_CONTROLLER_RESET_EVENT);
+ if (ret)
+ return ret;
+ }
+
+ ci_platform_configure(ci);
+
+ return ret;
+}
+
+static const struct ehci_driver_overrides ehci_ci_overrides = {
+ .extra_priv_size = sizeof(struct ehci_ci_priv),
+ .port_power = ehci_ci_portpower,
+ .reset = ehci_ci_reset,
+};
+
+static irqreturn_t host_irq(struct ci_hdrc *ci)
+{
+ return usb_hcd_irq(ci->irq, ci->hcd);
+}
+
+static int host_start(struct ci_hdrc *ci)
+{
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+ struct ehci_ci_priv *priv;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ hcd = __usb_create_hcd(&ci_ehci_hc_driver, ci->dev->parent,
+ ci->dev, dev_name(ci->dev), NULL);
+ if (!hcd)
+ return -ENOMEM;
+
+ dev_set_drvdata(ci->dev, ci);
+ hcd->rsrc_start = ci->hw_bank.phys;
+ hcd->rsrc_len = ci->hw_bank.size;
+ hcd->regs = ci->hw_bank.abs;
+ hcd->has_tt = 1;
+
+ hcd->power_budget = ci->platdata->power_budget;
+ hcd->tpl_support = ci->platdata->tpl_support;
+ if (ci->phy || ci->usb_phy) {
+ hcd->skip_phy_initialization = 1;
+ if (ci->usb_phy)
+ hcd->usb_phy = ci->usb_phy;
+ }
+
+ ehci = hcd_to_ehci(hcd);
+ ehci->caps = ci->hw_bank.cap;
+ ehci->has_hostpc = ci->hw_bank.lpm;
+ ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
+ ehci->imx28_write_fix = ci->imx28_write_fix;
+ ehci->has_ci_pec_bug = ci->has_portsc_pec_bug;
+
+ priv = (struct ehci_ci_priv *)ehci->priv;
+ priv->reg_vbus = NULL;
+
+ if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
+ if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
+ ret = regulator_enable(ci->platdata->reg_vbus);
+ if (ret) {
+ dev_err(ci->dev,
+ "Failed to enable vbus regulator, ret=%d\n",
+ ret);
+ goto put_hcd;
+ }
+ } else {
+ priv->reg_vbus = ci->platdata->reg_vbus;
+ }
+ }
+
+ if (ci->platdata->pins_host)
+ pinctrl_select_state(ci->platdata->pctl,
+ ci->platdata->pins_host);
+
+ ci->hcd = hcd;
+
+ ret = usb_add_hcd(hcd, 0, 0);
+ if (ret) {
+ ci->hcd = NULL;
+ goto disable_reg;
+ } else {
+ struct usb_otg *otg = &ci->otg;
+
+ if (ci_otg_is_fsm_mode(ci)) {
+ otg->host = &hcd->self;
+ hcd->self.otg_port = 1;
+ }
+
+ if (ci->platdata->notify_event &&
+ (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC))
+ ci->platdata->notify_event
+ (ci, CI_HDRC_IMX_HSIC_ACTIVE_EVENT);
+ }
+
+ return ret;
+
+disable_reg:
+ if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
+ (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
+ regulator_disable(ci->platdata->reg_vbus);
+put_hcd:
+ usb_put_hcd(hcd);
+
+ return ret;
+}
+
+static void host_stop(struct ci_hdrc *ci)
+{
+ struct usb_hcd *hcd = ci->hcd;
+
+ if (hcd) {
+ if (ci->platdata->notify_event)
+ ci->platdata->notify_event(ci,
+ CI_HDRC_CONTROLLER_STOPPED_EVENT);
+ usb_remove_hcd(hcd);
+ ci->role = CI_ROLE_END;
+ synchronize_irq(ci->irq);
+ usb_put_hcd(hcd);
+ if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
+ (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
+ regulator_disable(ci->platdata->reg_vbus);
+ }
+ ci->hcd = NULL;
+ ci->otg.host = NULL;
+
+ if (ci->platdata->pins_host && ci->platdata->pins_default)
+ pinctrl_select_state(ci->platdata->pctl,
+ ci->platdata->pins_default);
+}
+
+
+void ci_hdrc_host_destroy(struct ci_hdrc *ci)
+{
+ if (ci->role == CI_ROLE_HOST && ci->hcd)
+ host_stop(ci);
+}
+
+/* The below code is based on tegra ehci driver */
+static int ci_ehci_hub_control(
+ struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength
+)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ unsigned int ports = HCS_N_PORTS(ehci->hcs_params);
+ u32 __iomem *status_reg;
+ u32 temp, port_index;
+ unsigned long flags;
+ int retval = 0;
+ bool done = false;
+ struct device *dev = hcd->self.controller;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ port_index = wIndex & 0xff;
+ port_index -= (port_index > 0);
+ status_reg = &ehci->regs->port_status[port_index];
+
+ spin_lock_irqsave(&ehci->lock, flags);
+
+ if (ci->platdata->hub_control) {
+ retval = ci->platdata->hub_control(ci, typeReq, wValue, wIndex,
+ buf, wLength, &done, &flags);
+ if (done)
+ goto done;
+ }
+
+ if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
+ if (!wIndex || wIndex > ports) {
+ retval = -EPIPE;
+ goto done;
+ }
+
+ temp = ehci_readl(ehci, status_reg);
+ if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
+ retval = -EPIPE;
+ goto done;
+ }
+
+ temp &= ~(PORT_RWC_BITS | PORT_WKCONN_E);
+ temp |= PORT_WKDISC_E | PORT_WKOC_E;
+ ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
+
+ /*
+ * If a transaction is in progress, there may be a delay in
+ * suspending the port. Poll until the port is suspended.
+ */
+ if (ehci_handshake(ehci, status_reg, PORT_SUSPEND,
+ PORT_SUSPEND, 5000))
+ ehci_err(ehci, "timeout waiting for SUSPEND\n");
+
+ if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
+ if (ci->platdata->notify_event)
+ ci->platdata->notify_event(ci,
+ CI_HDRC_IMX_HSIC_SUSPEND_EVENT);
+
+ temp = ehci_readl(ehci, status_reg);
+ temp &= ~(PORT_WKDISC_E | PORT_WKCONN_E);
+ ehci_writel(ehci, temp, status_reg);
+ }
+
+ set_bit(port_index, &ehci->suspended_ports);
+ goto done;
+ }
+
+ /*
+ * After resume has finished, it needs do some post resume
+ * operation for some SoCs.
+ */
+ else if (typeReq == ClearPortFeature &&
+ wValue == USB_PORT_FEAT_C_SUSPEND) {
+ /* Make sure the resume has finished, it should be finished */
+ if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 25000))
+ ehci_err(ehci, "timeout waiting for resume\n");
+ }
+
+ spin_unlock_irqrestore(&ehci->lock, flags);
+
+ /* Handle the hub control events here */
+ return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
+done:
+ spin_unlock_irqrestore(&ehci->lock, flags);
+ return retval;
+}
+static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct device *dev = hcd->self.controller;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+ int port;
+ u32 tmp;
+
+ int ret = orig_bus_suspend(hcd);
+
+ if (ret)
+ return ret;
+
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ u32 __iomem *reg = &ehci->regs->port_status[port];
+ u32 portsc = ehci_readl(ehci, reg);
+
+ if (portsc & PORT_CONNECT) {
+ /*
+ * For chipidea, the resume signal will be ended
+ * automatically, so for remote wakeup case, the
+ * usbcmd.rs may not be set before the resume has
+ * ended if other resume paths consumes too much
+ * time (~24ms), in that case, the SOF will not
+ * send out within 3ms after resume ends, then the
+ * high speed device will enter full speed mode.
+ */
+
+ tmp = ehci_readl(ehci, &ehci->regs->command);
+ tmp |= CMD_RUN;
+ ehci_writel(ehci, tmp, &ehci->regs->command);
+ /*
+ * It needs a short delay between set RS bit and PHCD.
+ */
+ usleep_range(150, 200);
+ /*
+ * Need to clear WKCN and WKOC for imx HSIC,
+ * otherwise, there will be wakeup event.
+ */
+ if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
+ tmp = ehci_readl(ehci, reg);
+ tmp &= ~(PORT_WKDISC_E | PORT_WKCONN_E);
+ ehci_writel(ehci, tmp, reg);
+ }
+
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void ci_hdrc_free_dma_aligned_buffer(struct urb *urb, bool copy_back)
+{
+ struct ci_hdrc_dma_aligned_buffer *temp;
+
+ if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER))
+ return;
+ urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER;
+
+ temp = container_of(urb->transfer_buffer,
+ struct ci_hdrc_dma_aligned_buffer, data);
+ urb->transfer_buffer = temp->original_buffer;
+
+ if (copy_back && usb_urb_dir_in(urb)) {
+ size_t length;
+
+ if (usb_pipeisoc(urb->pipe))
+ length = urb->transfer_buffer_length;
+ else
+ length = urb->actual_length;
+
+ memcpy(temp->original_buffer, temp->data, length);
+ }
+
+ kfree(temp);
+}
+
+static int ci_hdrc_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags)
+{
+ struct ci_hdrc_dma_aligned_buffer *temp;
+
+ if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0)
+ return 0;
+ if (IS_ALIGNED((uintptr_t)urb->transfer_buffer, 4)
+ && IS_ALIGNED(urb->transfer_buffer_length, 4))
+ return 0;
+
+ temp = kmalloc(sizeof(*temp) + ALIGN(urb->transfer_buffer_length, 4), mem_flags);
+ if (!temp)
+ return -ENOMEM;
+
+ if (usb_urb_dir_out(urb))
+ memcpy(temp->data, urb->transfer_buffer,
+ urb->transfer_buffer_length);
+
+ temp->original_buffer = urb->transfer_buffer;
+ urb->transfer_buffer = temp->data;
+ urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER;
+
+ return 0;
+}
+
+static int ci_hdrc_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
+ gfp_t mem_flags)
+{
+ int ret;
+
+ ret = ci_hdrc_alloc_dma_aligned_buffer(urb, mem_flags);
+ if (ret)
+ return ret;
+
+ ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
+ if (ret)
+ ci_hdrc_free_dma_aligned_buffer(urb, false);
+
+ return ret;
+}
+
+static void ci_hdrc_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
+{
+ usb_hcd_unmap_urb_for_dma(hcd, urb);
+ ci_hdrc_free_dma_aligned_buffer(urb, true);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void ci_hdrc_host_suspend(struct ci_hdrc *ci)
+{
+ ehci_suspend(ci->hcd, device_may_wakeup(ci->dev));
+}
+
+static void ci_hdrc_host_resume(struct ci_hdrc *ci, bool power_lost)
+{
+ ehci_resume(ci->hcd, power_lost);
+}
+#endif
+
+int ci_hdrc_host_init(struct ci_hdrc *ci)
+{
+ struct ci_role_driver *rdrv;
+
+ if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
+ return -ENXIO;
+
+ rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
+ if (!rdrv)
+ return -ENOMEM;
+
+ rdrv->start = host_start;
+ rdrv->stop = host_stop;
+#ifdef CONFIG_PM_SLEEP
+ rdrv->suspend = ci_hdrc_host_suspend;
+ rdrv->resume = ci_hdrc_host_resume;
+#endif
+ rdrv->irq = host_irq;
+ rdrv->name = "host";
+ ci->roles[CI_ROLE_HOST] = rdrv;
+
+ if (ci->platdata->flags & CI_HDRC_REQUIRES_ALIGNED_DMA) {
+ ci_ehci_hc_driver.map_urb_for_dma = ci_hdrc_map_urb_for_dma;
+ ci_ehci_hc_driver.unmap_urb_for_dma = ci_hdrc_unmap_urb_for_dma;
+ }
+
+ return 0;
+}
+
+void ci_hdrc_host_driver_init(void)
+{
+ ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
+ orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
+ ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
+ ci_ehci_hc_driver.hub_control = ci_ehci_hub_control;
+}