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Subject[PATCH v2 4/4] usb: musb: Add support for MediaTek musb controller
Date
From: Min Guo <min.guo@mediatek.com>

This adds support for MediaTek musb controller in
host, peripheral and otg mode.
There are some quirk of MediaTek musb controller, such as:
-W1C interrupt status registers
-Private data toggle registers
-No dedicated DMA interrupt line

Signed-off-by: Min Guo <min.guo@mediatek.com>
Signed-off-by: Yonglong Wu <yonglong.wu@mediatek.com>
---
drivers/usb/musb/Kconfig | 8 +-
drivers/usb/musb/Makefile | 1 +
drivers/usb/musb/mediatek.c | 617 +++++++++++++++++++++++++++++++++++++++++++
drivers/usb/musb/musb_core.c | 69 +++++
drivers/usb/musb/musb_core.h | 9 +
drivers/usb/musb/musb_dma.h | 9 +
drivers/usb/musb/musb_host.c | 26 +-
drivers/usb/musb/musb_io.h | 6 +
drivers/usb/musb/musbhsdma.c | 55 ++--
9 files changed, 762 insertions(+), 38 deletions(-)
create mode 100644 drivers/usb/musb/mediatek.c

diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index ad08895..b72b7c1 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -115,6 +115,12 @@ config USB_MUSB_JZ4740
depends on USB_MUSB_GADGET
depends on USB_OTG_BLACKLIST_HUB

+config USB_MUSB_MEDIATEK
+ tristate "MediaTek platforms"
+ depends on ARCH_MEDIATEK || COMPILE_TEST
+ depends on NOP_USB_XCEIV
+ depends on GENERIC_PHY
+
config USB_MUSB_AM335X_CHILD
tristate

@@ -141,7 +147,7 @@ config USB_UX500_DMA

config USB_INVENTRA_DMA
bool 'Inventra'
- depends on USB_MUSB_OMAP2PLUS
+ depends on USB_MUSB_OMAP2PLUS || USB_MUSB_MEDIATEK
help
Enable DMA transfers using Mentor's engine.

diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index 3a88c79..63d82d0 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_USB_MUSB_DA8XX) += da8xx.o
obj-$(CONFIG_USB_MUSB_UX500) += ux500.o
obj-$(CONFIG_USB_MUSB_JZ4740) += jz4740.o
obj-$(CONFIG_USB_MUSB_SUNXI) += sunxi.o
+obj-$(CONFIG_USB_MUSB_MEDIATEK) += mediatek.o


obj-$(CONFIG_USB_MUSB_AM335X_CHILD) += musb_am335x.o
diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c
new file mode 100644
index 0000000..7221989
--- /dev/null
+++ b/drivers/usb/musb/mediatek.c
@@ -0,0 +1,617 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 MediaTek Inc.
+ *
+ * Author:
+ * Min Guo <min.guo@mediatek.com>
+ * Yonglong Wu <yonglong.wu@mediatek.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/usb_phy_generic.h>
+#include "musb_core.h"
+#include "musb_dma.h"
+
+#define USB_L1INTS 0x00a0
+#define USB_L1INTM 0x00a4
+#define MTK_MUSB_TXFUNCADDR 0x0480
+
+/* MediaTek controller toggle enable and status reg */
+#define MUSB_RXTOG 0x80
+#define MUSB_RXTOGEN 0x82
+#define MUSB_TXTOG 0x84
+#define MUSB_TXTOGEN 0x86
+
+#define TX_INT_STATUS BIT(0)
+#define RX_INT_STATUS BIT(1)
+#define USBCOM_INT_STATUS BIT(2)
+#define DMA_INT_STATUS BIT(3)
+
+#define DMA_INTR_STATUS_MSK GENMASK(7, 0)
+#define DMA_INTR_UNMASK_SET_MSK GENMASK(31, 24)
+
+enum mtk_vbus_id_state {
+ MTK_ID_FLOAT = 1,
+ MTK_ID_GROUND,
+ MTK_VBUS_OFF,
+ MTK_VBUS_VALID,
+};
+
+struct mtk_glue {
+ struct device *dev;
+ struct musb *musb;
+ struct platform_device *musb_pdev;
+ struct platform_device *usb_phy;
+ struct phy *phy;
+ struct usb_phy *xceiv;
+ enum phy_mode phy_mode;
+ struct clk *main;
+ struct clk *mcu;
+ struct clk *univpll;
+ struct regulator *vbus;
+ struct extcon_dev *edev;
+ struct notifier_block vbus_nb;
+ struct notifier_block id_nb;
+};
+
+static int mtk_musb_clks_get(struct mtk_glue *glue)
+{
+ struct device *dev = glue->dev;
+
+ glue->main = devm_clk_get(dev, "main");
+ if (IS_ERR(glue->main)) {
+ dev_err(dev, "fail to get main clock\n");
+ return PTR_ERR(glue->main);
+ }
+
+ glue->mcu = devm_clk_get(dev, "mcu");
+ if (IS_ERR(glue->mcu)) {
+ dev_err(dev, "fail to get mcu clock\n");
+ return PTR_ERR(glue->mcu);
+ }
+
+ glue->univpll = devm_clk_get(dev, "univpll");
+ if (IS_ERR(glue->univpll)) {
+ dev_err(dev, "fail to get univpll clock\n");
+ return PTR_ERR(glue->univpll);
+ }
+
+ return 0;
+}
+
+static int mtk_musb_clks_enable(struct mtk_glue *glue)
+{
+ int ret;
+
+ ret = clk_prepare_enable(glue->main);
+ if (ret) {
+ dev_err(glue->dev, "failed to enable main clock\n");
+ goto err_main_clk;
+ }
+
+ ret = clk_prepare_enable(glue->mcu);
+ if (ret) {
+ dev_err(glue->dev, "failed to enable mcu clock\n");
+ goto err_mcu_clk;
+ }
+
+ ret = clk_prepare_enable(glue->univpll);
+ if (ret) {
+ dev_err(glue->dev, "failed to enable univpll clock\n");
+ goto err_univpll_clk;
+ }
+
+ return 0;
+
+err_univpll_clk:
+ clk_disable_unprepare(glue->mcu);
+err_mcu_clk:
+ clk_disable_unprepare(glue->main);
+err_main_clk:
+ return ret;
+}
+
+static void mtk_musb_clks_disable(struct mtk_glue *glue)
+{
+ clk_disable_unprepare(glue->univpll);
+ clk_disable_unprepare(glue->mcu);
+ clk_disable_unprepare(glue->main);
+}
+
+static void mtk_musb_set_vbus(struct musb *musb, int is_on)
+{
+ struct device *dev = musb->controller;
+ struct mtk_glue *glue = dev_get_drvdata(dev->parent);
+ int ret;
+
+ /* vbus is optional */
+ if (!glue->vbus)
+ return;
+
+ dev_dbg(musb->controller, "%s, is_on=%d\r\n", __func__, is_on);
+ if (is_on) {
+ ret = regulator_enable(glue->vbus);
+ if (ret) {
+ dev_err(glue->dev, "fail to enable vbus regulator\n");
+ return;
+ }
+ } else {
+ regulator_disable(glue->vbus);
+ }
+}
+
+/*
+ * switch to host: -> MTK_VBUS_OFF --> MTK_ID_GROUND
+ * switch to device: -> MTK_ID_FLOAT --> MTK_VBUS_VALID
+ */
+static void mtk_musb_set_mailbox(struct mtk_glue *glue,
+ enum mtk_vbus_id_state status)
+{
+ struct musb *musb = glue->musb;
+ u8 devctl = 0;
+
+ dev_dbg(glue->dev, "mailbox state(%d)\n", status);
+ switch (status) {
+ case MTK_ID_GROUND:
+ phy_power_on(glue->phy);
+ devctl = readb(musb->mregs + MUSB_DEVCTL);
+ musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
+ mtk_musb_set_vbus(musb, 1);
+ glue->phy_mode = PHY_MODE_USB_HOST;
+ phy_set_mode(glue->phy, glue->phy_mode);
+ devctl |= MUSB_DEVCTL_SESSION;
+ musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+ MUSB_HST_MODE(musb);
+ break;
+ /*
+ * MTK_ID_FLOAT process is the same as MTK_VBUS_VALID
+ * except that turn off VBUS
+ */
+ case MTK_ID_FLOAT:
+ mtk_musb_set_vbus(musb, 0);
+ /* fall through */
+ case MTK_VBUS_OFF:
+ musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+ devctl &= ~MUSB_DEVCTL_SESSION;
+ musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+ phy_power_off(glue->phy);
+ break;
+ case MTK_VBUS_VALID:
+ phy_power_on(glue->phy);
+ glue->phy_mode = PHY_MODE_USB_DEVICE;
+ phy_set_mode(glue->phy, glue->phy_mode);
+ MUSB_DEV_MODE(musb);
+ break;
+ default:
+ dev_err(glue->dev, "invalid state\n");
+ }
+}
+
+static int mtk_musb_id_notifier(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct mtk_glue *glue = container_of(nb, struct mtk_glue, id_nb);
+
+ if (event)
+ mtk_musb_set_mailbox(glue, MTK_ID_GROUND);
+ else
+ mtk_musb_set_mailbox(glue, MTK_ID_FLOAT);
+
+ return NOTIFY_DONE;
+}
+
+static int mtk_musb_vbus_notifier(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct mtk_glue *glue = container_of(nb, struct mtk_glue, vbus_nb);
+
+ if (event)
+ mtk_musb_set_mailbox(glue, MTK_VBUS_VALID);
+ else
+ mtk_musb_set_mailbox(glue, MTK_VBUS_OFF);
+
+ return NOTIFY_DONE;
+}
+
+static void mtk_otg_switch_init(struct mtk_glue *glue)
+{
+ int ret;
+
+ /* extcon is optional */
+ if (!glue->edev)
+ return;
+
+ glue->vbus_nb.notifier_call = mtk_musb_vbus_notifier;
+ ret = devm_extcon_register_notifier(glue->dev, glue->edev, EXTCON_USB,
+ &glue->vbus_nb);
+ if (ret < 0)
+ dev_err(glue->dev, "failed to register notifier for USB\n");
+
+ glue->id_nb.notifier_call = mtk_musb_id_notifier;
+ ret = devm_extcon_register_notifier(glue->dev, glue->edev,
+ EXTCON_USB_HOST, &glue->id_nb);
+ if (ret < 0)
+ dev_err(glue->dev, "failed to register notifier for USB-HOST\n");
+
+ dev_dbg(glue->dev, "EXTCON_USB: %d, EXTCON_USB_HOST: %d\n",
+ extcon_get_state(glue->edev, EXTCON_USB),
+ extcon_get_state(glue->edev, EXTCON_USB_HOST));
+
+ /* default as host, switch to device mode if needed */
+ if (extcon_get_state(glue->edev, EXTCON_USB_HOST) == false)
+ mtk_musb_set_mailbox(glue, MTK_ID_FLOAT);
+ if (extcon_get_state(glue->edev, EXTCON_USB) == true)
+ mtk_musb_set_mailbox(glue, MTK_VBUS_VALID);
+}
+
+static irqreturn_t generic_interrupt(int irq, void *__hci)
+{
+ unsigned long flags;
+ irqreturn_t retval = IRQ_NONE;
+ struct musb *musb = __hci;
+
+ spin_lock_irqsave(&musb->lock, flags);
+ musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB) &
+ musb_readb(musb->mregs, MUSB_INTRUSBE);
+ musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX)
+ & musb_readw(musb->mregs, MUSB_INTRTXE);
+ musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX)
+ & musb_readw(musb->mregs, MUSB_INTRRXE);
+ /* MediaTek controller interrupt status is W1C */
+ musb_clearw(musb->mregs, MUSB_INTRRX, musb->int_rx);
+ musb_clearw(musb->mregs, MUSB_INTRTX, musb->int_tx);
+ musb_clearb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
+
+ if (musb->int_usb || musb->int_tx || musb->int_rx)
+ retval = musb_interrupt(musb);
+
+ spin_unlock_irqrestore(&musb->lock, flags);
+
+ return retval;
+}
+
+static irqreturn_t mtk_musb_interrupt(int irq, void *dev_id)
+{
+ irqreturn_t retval = IRQ_NONE;
+ struct musb *musb = (struct musb *)dev_id;
+ u32 l1_ints;
+
+ l1_ints = musb_readl(musb->mregs, USB_L1INTS) &
+ musb_readl(musb->mregs, USB_L1INTM);
+
+ if (l1_ints & (TX_INT_STATUS | RX_INT_STATUS | USBCOM_INT_STATUS))
+ retval = generic_interrupt(irq, musb);
+
+#if defined(CONFIG_USB_INVENTRA_DMA)
+ if (l1_ints & DMA_INT_STATUS)
+ retval = dma_controller_irq(irq, musb->dma_controller);
+#endif
+ return retval;
+}
+
+static u32 mtk_musb_busctl_offset(u8 epnum, u16 offset)
+{
+ return MTK_MUSB_TXFUNCADDR + offset + 8 * epnum;
+}
+
+static void mtk_musb_clearb(void __iomem *addr, unsigned int offset, u8 data)
+{
+ /* W1C */
+ musb_writeb(addr, offset, data);
+}
+
+static void mtk_musb_clearw(void __iomem *addr, unsigned int offset, u16 data)
+{
+ /* W1C */
+ musb_writew(addr, offset, data);
+}
+
+static int mtk_musb_init(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct mtk_glue *glue = dev_get_drvdata(dev->parent);
+ int ret;
+
+ glue->musb = musb;
+ musb->phy = glue->phy;
+ musb->xceiv = glue->xceiv;
+ musb->is_host = false;
+ musb->isr = mtk_musb_interrupt;
+ ret = phy_init(glue->phy);
+ if (ret)
+ return ret;
+
+ ret = phy_power_on(glue->phy);
+ if (ret) {
+ phy_exit(glue->phy);
+ return ret;
+ }
+
+ phy_set_mode(glue->phy, glue->phy_mode);
+
+#if defined(CONFIG_USB_INVENTRA_DMA)
+ musb_writel(musb->mregs, MUSB_HSDMA_INTR,
+ DMA_INTR_STATUS_MSK | DMA_INTR_UNMASK_SET_MSK);
+#endif
+ musb_writel(musb->mregs, USB_L1INTM, TX_INT_STATUS | RX_INT_STATUS |
+ USBCOM_INT_STATUS | DMA_INT_STATUS);
+ return 0;
+}
+
+static u16 mtk_musb_get_toggle(struct musb_qh *qh, int is_in)
+{
+ struct musb *musb = qh->hw_ep->musb;
+ u8 epnum = qh->hw_ep->epnum;
+ u16 toggle;
+
+ if (is_in)
+ toggle = musb_readw(musb->mregs, MUSB_RXTOG);
+ else
+ toggle = musb_readw(musb->mregs, MUSB_TXTOG);
+
+ return toggle & (1 << epnum);
+}
+
+static u16 mtk_musb_set_toggle(struct musb_qh *qh, int is_in, struct urb *urb)
+{
+ struct musb *musb = qh->hw_ep->musb;
+ u8 epnum = qh->hw_ep->epnum;
+ u16 toggle = 0;
+
+ toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
+
+ if (is_in) {
+ musb_writew(musb->mregs, MUSB_RXTOGEN, (1 << epnum));
+ musb_writew(musb->mregs, MUSB_RXTOG, (toggle << epnum));
+ } else {
+ musb_writew(musb->mregs, MUSB_TXTOGEN, (1 << epnum));
+ musb_writew(musb->mregs, MUSB_TXTOG, (toggle << epnum));
+ }
+
+ return 0;
+}
+
+static int mtk_musb_set_mode(struct musb *musb, u8 mode)
+{
+ struct device *dev = musb->controller;
+ struct mtk_glue *glue = dev_get_drvdata(dev->parent);
+ enum phy_mode new_mode;
+
+ switch (mode) {
+ case MUSB_HOST:
+ new_mode = PHY_MODE_USB_HOST;
+ mtk_musb_set_vbus(musb, 1);
+ break;
+ case MUSB_PERIPHERAL:
+ new_mode = PHY_MODE_USB_DEVICE;
+ break;
+ case MUSB_OTG:
+ new_mode = PHY_MODE_USB_HOST;
+ break;
+ default:
+ dev_err(musb->controller->parent,
+ "Error requested mode not supported by this kernel\n");
+ return -EINVAL;
+ }
+ if (glue->phy_mode == new_mode)
+ return 0;
+
+ mtk_musb_set_mailbox(glue, MTK_ID_GROUND);
+ return 0;
+}
+
+static int mtk_musb_exit(struct musb *musb)
+{
+ struct device *dev = musb->controller;
+ struct mtk_glue *glue = dev_get_drvdata(dev->parent);
+
+ phy_power_off(glue->phy);
+ phy_exit(glue->phy);
+ mtk_musb_clks_disable(glue);
+
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+ return 0;
+}
+
+static const struct musb_platform_ops mtk_musb_ops = {
+ .quirks = MUSB_DMA_INVENTRA,
+ .init = mtk_musb_init,
+ .get_toggle = mtk_musb_get_toggle,
+ .set_toggle = mtk_musb_set_toggle,
+ .exit = mtk_musb_exit,
+#ifdef CONFIG_USB_INVENTRA_DMA
+ .dma_init = musbhs_dma_controller_create_noirq,
+ .dma_exit = musbhs_dma_controller_destroy,
+#endif
+ .clearb = mtk_musb_clearb,
+ .clearw = mtk_musb_clearw,
+ .busctl_offset = mtk_musb_busctl_offset,
+ .set_mode = mtk_musb_set_mode,
+ .set_vbus = mtk_musb_set_vbus,
+};
+
+#define MTK_MUSB_MAX_EP_NUM 8
+#define MTK_MUSB_RAM_BITS 11
+
+static struct musb_fifo_cfg mtk_musb_mode_cfg[] = {
+ { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
+ { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
+ { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
+ { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
+ { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
+ { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 1024, },
+ { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 1024, },
+ { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
+ { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 64, },
+};
+
+static const struct musb_hdrc_config mtk_musb_hdrc_config = {
+ .fifo_cfg = mtk_musb_mode_cfg,
+ .fifo_cfg_size = ARRAY_SIZE(mtk_musb_mode_cfg),
+ .multipoint = true,
+ .dyn_fifo = true,
+ .num_eps = MTK_MUSB_MAX_EP_NUM,
+ .ram_bits = MTK_MUSB_RAM_BITS,
+};
+
+static const struct platform_device_info mtk_dev_info = {
+ .name = "musb-hdrc",
+ .id = PLATFORM_DEVID_AUTO,
+ .dma_mask = DMA_BIT_MASK(32),
+};
+
+static int mtk_musb_probe(struct platform_device *pdev)
+{
+ struct musb_hdrc_platform_data *pdata;
+ struct mtk_glue *glue;
+ struct platform_device_info pinfo;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int ret = -ENOMEM;
+
+ glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
+ if (!glue)
+ return -ENOMEM;
+
+ glue->dev = dev;
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ ret = mtk_musb_clks_get(glue);
+ if (ret)
+ return ret;
+
+ glue->vbus = devm_regulator_get(dev, "vbus");
+ if (IS_ERR(glue->vbus)) {
+ dev_err(dev, "fail to get vbus\n");
+ return PTR_ERR(glue->vbus);
+ }
+
+ pdata->config = &mtk_musb_hdrc_config;
+ pdata->platform_ops = &mtk_musb_ops;
+ if (of_property_read_bool(np, "extcon")) {
+ glue->edev = extcon_get_edev_by_phandle(dev, 0);
+ if (IS_ERR(glue->edev)) {
+ dev_err(dev, "fail to get extcon\n");
+ return PTR_ERR(glue->edev);
+ }
+ }
+
+ pdata->mode = usb_get_dr_mode(dev);
+ switch (pdata->mode) {
+ case USB_DR_MODE_HOST:
+ glue->phy_mode = PHY_MODE_USB_HOST;
+ break;
+ case USB_DR_MODE_PERIPHERAL:
+ glue->phy_mode = PHY_MODE_USB_DEVICE;
+ break;
+ default:
+ pdata->mode = USB_DR_MODE_OTG;
+ /* FALL THROUGH */
+ case USB_DR_MODE_OTG:
+ glue->phy_mode = PHY_MODE_USB_OTG;
+ break;
+ }
+
+ glue->phy = devm_of_phy_get_by_index(dev, np, 0);
+ if (IS_ERR(glue->phy)) {
+ dev_err(dev, "fail to getting phy %ld\n",
+ PTR_ERR(glue->phy));
+ return PTR_ERR(glue->phy);
+ }
+
+ glue->usb_phy = usb_phy_generic_register();
+ if (IS_ERR(glue->usb_phy)) {
+ dev_err(dev, "fail to registering usb-phy %ld\n",
+ PTR_ERR(glue->usb_phy));
+ return PTR_ERR(glue->usb_phy);
+ }
+
+ glue->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(glue->xceiv)) {
+ dev_err(dev, "fail to getting usb-phy %d\n", ret);
+ ret = PTR_ERR(glue->xceiv);
+ goto err_unregister_usb_phy;
+ }
+
+ platform_set_drvdata(pdev, glue);
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+
+ ret = mtk_musb_clks_enable(glue);
+ if (ret)
+ goto err_enable_clk;
+
+ pinfo = mtk_dev_info;
+ pinfo.parent = dev;
+ pinfo.res = pdev->resource;
+ pinfo.num_res = pdev->num_resources;
+ pinfo.data = pdata;
+ pinfo.size_data = sizeof(*pdata);
+
+ glue->musb_pdev = platform_device_register_full(&pinfo);
+ if (IS_ERR(glue->musb_pdev)) {
+ ret = PTR_ERR(glue->musb_pdev);
+ dev_err(dev, "failed to register musb device: %d\n", ret);
+ goto err_device_register;
+ }
+
+ if (pdata->mode == USB_DR_MODE_OTG)
+ mtk_otg_switch_init(glue);
+
+ dev_info(dev, "USB probe done!\n");
+ return 0;
+
+err_device_register:
+ mtk_musb_clks_disable(glue);
+err_enable_clk:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+err_unregister_usb_phy:
+ usb_phy_generic_unregister(glue->usb_phy);
+ return ret;
+}
+
+static int mtk_musb_remove(struct platform_device *pdev)
+{
+ struct mtk_glue *glue = platform_get_drvdata(pdev);
+ struct platform_device *usb_phy = glue->usb_phy;
+
+ platform_device_unregister(glue->musb_pdev);
+ usb_phy_generic_unregister(usb_phy);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id mtk_musb_match[] = {
+ {.compatible = "mediatek,mtk-musb",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtk_musb_match);
+#endif
+
+static struct platform_driver mtk_musb_driver = {
+ .probe = mtk_musb_probe,
+ .remove = mtk_musb_remove,
+ .driver = {
+ .name = "musb-mtk",
+ .of_match_table = of_match_ptr(mtk_musb_match),
+ },
+};
+
+module_platform_driver(mtk_musb_driver);
+
+MODULE_DESCRIPTION("MediaTek MUSB Glue Layer");
+MODULE_AUTHOR("Min Guo <min.guo@mediatek.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index b7d5627..2c0d102 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -260,6 +260,11 @@ static void musb_default_writeb(void __iomem *addr, unsigned offset, u8 data)
__raw_writeb(data, addr + offset);
}

+static void
+musb_default_clearb(void __iomem *addr, unsigned int offset, u8 data)
+{
+}
+
static u16 musb_default_readw(const void __iomem *addr, unsigned offset)
{
u16 data = __raw_readw(addr + offset);
@@ -274,6 +279,43 @@ static void musb_default_writew(void __iomem *addr, unsigned offset, u16 data)
__raw_writew(data, addr + offset);
}

+static void
+musb_default_clearw(void __iomem *addr, unsigned int offset, u16 data)
+{
+}
+
+static u16 musb_default_get_toggle(struct musb_qh *qh, int is_in)
+{
+ void __iomem *epio = qh->hw_ep->regs;
+ u16 csr;
+
+ if (is_in)
+ csr = musb_readw(epio, MUSB_RXCSR) & MUSB_RXCSR_H_DATATOGGLE;
+ else
+ csr = musb_readw(epio, MUSB_TXCSR) & MUSB_TXCSR_H_DATATOGGLE;
+
+ return csr;
+}
+
+static u16 musb_default_set_toggle(struct musb_qh *qh, int is_in,
+ struct urb *urb)
+{
+ u16 csr = 0;
+ u16 toggle = 0;
+
+ toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
+
+ if (is_in)
+ csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
+ | MUSB_RXCSR_H_DATATOGGLE) : 0;
+ else
+ csr |= toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
+ | MUSB_TXCSR_H_DATATOGGLE)
+ : MUSB_TXCSR_CLRDATATOG;
+
+ return csr;
+}
+
/*
* Load an endpoint's FIFO
*/
@@ -370,12 +412,18 @@ static void musb_default_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
void (*musb_writeb)(void __iomem *addr, unsigned offset, u8 data);
EXPORT_SYMBOL_GPL(musb_writeb);

+void (*musb_clearb)(void __iomem *addr, unsigned int offset, u8 data);
+EXPORT_SYMBOL_GPL(musb_clearb);
+
u16 (*musb_readw)(const void __iomem *addr, unsigned offset);
EXPORT_SYMBOL_GPL(musb_readw);

void (*musb_writew)(void __iomem *addr, unsigned offset, u16 data);
EXPORT_SYMBOL_GPL(musb_writew);

+void (*musb_clearw)(void __iomem *addr, unsigned int offset, u16 data);
+EXPORT_SYMBOL_GPL(musb_clearw);
+
u32 musb_readl(const void __iomem *addr, unsigned offset)
{
u32 data = __raw_readl(addr + offset);
@@ -1028,6 +1076,11 @@ static void musb_disable_interrupts(struct musb *musb)
temp = musb_readb(mbase, MUSB_INTRUSB);
temp = musb_readw(mbase, MUSB_INTRTX);
temp = musb_readw(mbase, MUSB_INTRRX);
+
+ /* some platform needs clear pending interrupts by manual */
+ musb_clearb(mbase, MUSB_INTRUSB, musb_readb(mbase, MUSB_INTRUSB));
+ musb_clearw(mbase, MUSB_INTRRX, musb_readw(mbase, MUSB_INTRRX));
+ musb_clearw(mbase, MUSB_INTRTX, musb_readw(mbase, MUSB_INTRTX));
}

static void musb_enable_interrupts(struct musb *musb)
@@ -2192,6 +2245,8 @@ static void musb_deassert_reset(struct work_struct *work)
musb_writeb = musb_default_writeb;
musb_readw = musb_default_readw;
musb_writew = musb_default_writew;
+ musb_clearb = musb_default_clearb;
+ musb_clearw = musb_default_clearw;

/* The musb_platform_init() call:
* - adjusts musb->mregs
@@ -2252,10 +2307,14 @@ static void musb_deassert_reset(struct work_struct *work)
musb_readb = musb->ops->readb;
if (musb->ops->writeb)
musb_writeb = musb->ops->writeb;
+ if (musb->ops->clearb)
+ musb_clearb = musb->ops->clearb;
if (musb->ops->readw)
musb_readw = musb->ops->readw;
if (musb->ops->writew)
musb_writew = musb->ops->writew;
+ if (musb->ops->clearw)
+ musb_clearw = musb->ops->clearw;

#ifndef CONFIG_MUSB_PIO_ONLY
if (!musb->ops->dma_init || !musb->ops->dma_exit) {
@@ -2277,6 +2336,16 @@ static void musb_deassert_reset(struct work_struct *work)
else
musb->io.write_fifo = musb_default_write_fifo;

+ if (musb->ops->get_toggle)
+ musb->io.get_toggle = musb->ops->get_toggle;
+ else
+ musb->io.get_toggle = musb_default_get_toggle;
+
+ if (musb->ops->set_toggle)
+ musb->io.set_toggle = musb->ops->set_toggle;
+ else
+ musb->io.set_toggle = musb_default_set_toggle;
+
if (!musb->xceiv->io_ops) {
musb->xceiv->io_dev = musb->controller;
musb->xceiv->io_priv = musb->mregs;
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 04203b7..71dca80 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -27,6 +27,7 @@
struct musb;
struct musb_hw_ep;
struct musb_ep;
+struct musb_qh;

/* Helper defines for struct musb->hwvers */
#define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
@@ -119,10 +120,14 @@ enum musb_g_ep0_state {
* @fifo_offset: returns the fifo offset
* @readb: read 8 bits
* @writeb: write 8 bits
+ * @clearb: clear 8 bits
* @readw: read 16 bits
* @writew: write 16 bits
+ * @clearw: clear 16 bits
* @read_fifo: reads the fifo
* @write_fifo: writes to fifo
+ * @get_toggle: platform specific get toggle function
+ * @set_toggle: platform specific set toggle function
* @dma_init: platform specific dma init function
* @dma_exit: platform specific dma exit function
* @init: turns on clocks, sets up platform-specific registers, etc
@@ -163,10 +168,14 @@ struct musb_platform_ops {
u32 (*busctl_offset)(u8 epnum, u16 offset);
u8 (*readb)(const void __iomem *addr, unsigned offset);
void (*writeb)(void __iomem *addr, unsigned offset, u8 data);
+ void (*clearb)(void __iomem *addr, unsigned int offset, u8 data);
u16 (*readw)(const void __iomem *addr, unsigned offset);
void (*writew)(void __iomem *addr, unsigned offset, u16 data);
+ void (*clearw)(void __iomem *addr, unsigned int offset, u16 data);
void (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
void (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
+ u16 (*get_toggle)(struct musb_qh *qh, int is_in);
+ u16 (*set_toggle)(struct musb_qh *qh, int is_in, struct urb *urb);
struct dma_controller *
(*dma_init) (struct musb *musb, void __iomem *base);
void (*dma_exit)(struct dma_controller *c);
diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h
index 8f60271..05103ea 100644
--- a/drivers/usb/musb/musb_dma.h
+++ b/drivers/usb/musb/musb_dma.h
@@ -35,6 +35,12 @@
* whether shared with the Inventra core or separate.
*/

+#define MUSB_HSDMA_BASE 0x200
+#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
+#define MUSB_HSDMA_CONTROL 0x4
+#define MUSB_HSDMA_ADDRESS 0x8
+#define MUSB_HSDMA_COUNT 0xc
+
#define DMA_ADDR_INVALID (~(dma_addr_t)0)

#ifdef CONFIG_MUSB_PIO_ONLY
@@ -191,6 +197,9 @@ static inline void musb_dma_controller_destroy(struct dma_controller *d) { }
extern struct dma_controller *
musbhs_dma_controller_create(struct musb *musb, void __iomem *base);
extern void musbhs_dma_controller_destroy(struct dma_controller *c);
+extern struct dma_controller *
+musbhs_dma_controller_create_noirq(struct musb *musb, void __iomem *base);
+extern irqreturn_t dma_controller_irq(int irq, void *private_data);

extern struct dma_controller *
tusb_dma_controller_create(struct musb *musb, void __iomem *base);
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 16d0ba4..ba66f44 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -290,39 +290,23 @@ static void musb_giveback(struct musb *musb, struct urb *urb, int status)
static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
struct urb *urb)
{
- void __iomem *epio = qh->hw_ep->regs;
- u16 csr;
+ struct musb *musb = qh->hw_ep->musb;
+ u16 csr;

/*
* FIXME: the current Mentor DMA code seems to have
* problems getting toggle correct.
*/
-
- if (is_in)
- csr = musb_readw(epio, MUSB_RXCSR) & MUSB_RXCSR_H_DATATOGGLE;
- else
- csr = musb_readw(epio, MUSB_TXCSR) & MUSB_TXCSR_H_DATATOGGLE;
-
+ csr = musb->io.get_toggle(qh, is_in);
usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
}

static inline u16 musb_set_toggle(struct musb_qh *qh, int is_in,
struct urb *urb)
{
- u16 csr = 0;
- u16 toggle = 0;
-
- toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
-
- if (is_in)
- csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
- | MUSB_RXCSR_H_DATATOGGLE) : 0;
- else
- csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
- | MUSB_TXCSR_H_DATATOGGLE)
- : MUSB_TXCSR_CLRDATATOG;
+ struct musb *musb = qh->hw_ep->musb;

- return csr;
+ return musb->io.set_toggle(qh, is_in, urb);
}

/*
diff --git a/drivers/usb/musb/musb_io.h b/drivers/usb/musb/musb_io.h
index 8058a58..9bae09b 100644
--- a/drivers/usb/musb/musb_io.h
+++ b/drivers/usb/musb/musb_io.h
@@ -22,6 +22,8 @@
* @read_fifo: platform specific function to read fifo
* @write_fifo: platform specific function to write fifo
* @busctl_offset: platform specific function to get busctl offset
+ * @get_toggle: platform specific function to get toggle
+ * @set_toggle: platform specific function to set toggle
*/
struct musb_io {
u32 (*ep_offset)(u8 epnum, u16 offset);
@@ -30,13 +32,17 @@ struct musb_io {
void (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
void (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
u32 (*busctl_offset)(u8 epnum, u16 offset);
+ u16 (*get_toggle)(struct musb_qh *qh, int is_in);
+ u16 (*set_toggle)(struct musb_qh *qh, int is_in, struct urb *urb);
};

/* Do not add new entries here, add them the struct musb_io instead */
extern u8 (*musb_readb)(const void __iomem *addr, unsigned offset);
extern void (*musb_writeb)(void __iomem *addr, unsigned offset, u8 data);
+extern void (*musb_clearb)(void __iomem *addr, unsigned int offset, u8 data);
extern u16 (*musb_readw)(const void __iomem *addr, unsigned offset);
extern void (*musb_writew)(void __iomem *addr, unsigned offset, u16 data);
+extern void (*musb_clearw)(void __iomem *addr, unsigned int offset, u16 data);
extern u32 musb_readl(const void __iomem *addr, unsigned offset);
extern void musb_writel(void __iomem *addr, unsigned offset, u32 data);

diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index a688f7f..b05fe68 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -10,12 +10,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "musb_core.h"
-
-#define MUSB_HSDMA_BASE 0x200
-#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
-#define MUSB_HSDMA_CONTROL 0x4
-#define MUSB_HSDMA_ADDRESS 0x8
-#define MUSB_HSDMA_COUNT 0xc
+#include "musb_dma.h"

#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
(MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
@@ -268,7 +263,7 @@ static int dma_channel_abort(struct dma_channel *channel)
return 0;
}

-static irqreturn_t dma_controller_irq(int irq, void *private_data)
+irqreturn_t dma_controller_irq(int irq, void *private_data)
{
struct musb_dma_controller *controller = private_data;
struct musb *musb = controller->private_data;
@@ -291,6 +286,9 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)

int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR);

+ /* some platform needs clear pending interrupts by manual */
+ musb_clearb(musb->mregs, MUSB_HSDMA_INTR, int_hsdma);
+
if (!int_hsdma) {
musb_dbg(musb, "spurious DMA irq");

@@ -382,6 +380,7 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
spin_unlock_irqrestore(&musb->lock, flags);
return retval;
}
+EXPORT_SYMBOL_GPL(dma_controller_irq);

void musbhs_dma_controller_destroy(struct dma_controller *c)
{
@@ -397,18 +396,10 @@ void musbhs_dma_controller_destroy(struct dma_controller *c)
}
EXPORT_SYMBOL_GPL(musbhs_dma_controller_destroy);

-struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
+static struct musb_dma_controller *dma_controller_alloc(struct musb *musb,
void __iomem *base)
{
struct musb_dma_controller *controller;
- struct device *dev = musb->controller;
- struct platform_device *pdev = to_platform_device(dev);
- int irq = platform_get_irq_byname(pdev, "dma");
-
- if (irq <= 0) {
- dev_err(dev, "No DMA interrupt line!\n");
- return NULL;
- }

controller = kzalloc(sizeof(*controller), GFP_KERNEL);
if (!controller)
@@ -422,6 +413,25 @@ struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
controller->controller.channel_release = dma_channel_release;
controller->controller.channel_program = dma_channel_program;
controller->controller.channel_abort = dma_channel_abort;
+ return controller;
+}
+
+struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
+ void __iomem *base)
+{
+ struct musb_dma_controller *controller;
+ struct device *dev = musb->controller;
+ struct platform_device *pdev = to_platform_device(dev);
+ int irq = platform_get_irq_byname(pdev, "dma");
+
+ if (irq <= 0) {
+ dev_err(dev, "No DMA interrupt line!\n");
+ return NULL;
+ }
+
+ controller = dma_controller_alloc(musb, base);
+ if (!controller)
+ return NULL;

if (request_irq(irq, dma_controller_irq, 0,
dev_name(musb->controller), &controller->controller)) {
@@ -436,3 +446,16 @@ struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
return &controller->controller;
}
EXPORT_SYMBOL_GPL(musbhs_dma_controller_create);
+
+struct dma_controller *musbhs_dma_controller_create_noirq(struct musb *musb,
+ void __iomem *base)
+{
+ struct musb_dma_controller *controller;
+
+ controller = dma_controller_alloc(musb, base);
+ if (!controller)
+ return NULL;
+
+ return &controller->controller;
+}
+EXPORT_SYMBOL_GPL(musbhs_dma_controller_create_noirq);
--
1.9.1
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  Last update: 2019-01-15 02:45    [W:0.158 / U:30.128 seconds]
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