From: Min Guo <[email protected]>
These patches introduce the MediaTek MUSB controller driver.
The driver can be configured as Dual-Role Device (DRD),
Peripheral Only and Host Only modes. This has beed tested on
MT2701 with a variety of devices in host mode and with the
f_mass gadget driver in peripheral mode, plugging otg cables
in/out a lot of times in all possible imaginable plug orders.
changes in v2:
changes of dt-bindings suggested by Rob and Bin:
1. Modify DRC to DRD
2. Drop the "<soc-model>-musb" in compatible
3. Remove phy-names
4. Add space after comma in clock-names
dtsi:
1. Remove phy-names
changes of driver suggested by Bin:
1. Add a new patch for musb_set_toggle
2. Add summarize of MediaTek musb controller differences in the commit log
3. Abondon patch "usb: musb: Move musbhsdma macro definition to musb_dma.h"
4. Add "|| COMPILE_TEST" in Kconfig
5. Add musb_clearb() and musb_clearw() hooks
6. Add get_toggle() and set_toggle() hooks
7. Replace musb_readl() with musb_readw() to read 16bit toggle register
8. Move MediaTek's private toggle registers from musb_regs.h to mediatek.c
9. Create musbhs_dma_controller_create_noirq()
Min Guo (4):
dt-bindings: usb: musb: Add support for MediaTek musb controller
arm: dts: mt2701: Add usb2 device nodes
usb: musb: Extract set toggle as a separate interface
usb: musb: Add support for MediaTek musb controller
.../devicetree/bindings/usb/mediatek,musb.txt | 43 ++
arch/arm/boot/dts/mt2701-evb.dts | 21 +
arch/arm/boot/dts/mt2701.dtsi | 33 ++
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 | 35 +-
drivers/usb/musb/musb_io.h | 6 +
drivers/usb/musb/musbhsdma.c | 55 +-
12 files changed, 868 insertions(+), 38 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/mediatek,musb.txt
create mode 100644 drivers/usb/musb/mediatek.c
--
1.9.1
From: Min Guo <[email protected]>
Add musb nodes and usb2 phy nodes for MT2701
Signed-off-by: Min Guo <[email protected]>
---
arch/arm/boot/dts/mt2701-evb.dts | 21 +++++++++++++++++++++
arch/arm/boot/dts/mt2701.dtsi | 33 +++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+)
diff --git a/arch/arm/boot/dts/mt2701-evb.dts b/arch/arm/boot/dts/mt2701-evb.dts
index be0edb3..2635911 100644
--- a/arch/arm/boot/dts/mt2701-evb.dts
+++ b/arch/arm/boot/dts/mt2701-evb.dts
@@ -6,6 +6,7 @@
*/
/dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
#include "mt2701.dtsi"
/ {
@@ -60,6 +61,20 @@
>;
default-brightness-level = <9>;
};
+
+ extcon_usb: extcon_iddig {
+ compatible = "linux,extcon-usb-gpio";
+ id-gpio = <&pio 44 GPIO_ACTIVE_HIGH>;
+ };
+
+ usb_vbus: regulator@0 {
+ compatible = "regulator-fixed";
+ regulator-name = "usb_vbus";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ gpio = <&pio 45 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ };
};
&auxadc {
@@ -229,3 +244,9 @@
&uart0 {
status = "okay";
};
+
+&usb2 {
+ vbus-supply = <&usb_vbus>;
+ extcon = <&extcon_usb>;
+ status = "okay";
+};
diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
index 180377e..a6b1434 100644
--- a/arch/arm/boot/dts/mt2701.dtsi
+++ b/arch/arm/boot/dts/mt2701.dtsi
@@ -670,6 +670,39 @@
};
};
+ usb2: usb@11200000 {
+ compatible = "mediatek,mt2701-musb",
+ "mediatek,mtk-musb";
+ reg = <0 0x11200000 0 0x1000>;
+ interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
+ interrupt-names = "mc";
+ phys = <&u2port2 PHY_TYPE_USB2>;
+ dr_mode = "otg";
+ clocks = <&pericfg CLK_PERI_USB0>,
+ <&pericfg CLK_PERI_USB0_MCU>,
+ <&pericfg CLK_PERI_USB_SLV>;
+ clock-names = "main","mcu","univpll";
+ power-domains = <&scpsys MT2701_POWER_DOMAIN_IFR_MSC>;
+ status = "disabled";
+ };
+
+ u2phy0: usb-phy@11210000 {
+ compatible = "mediatek,generic-tphy-v1";
+ reg = <0 0x11210000 0 0x0800>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ status = "okay";
+
+ u2port2: usb-phy@1a1c4800 {
+ reg = <0 0x11210800 0 0x0100>;
+ clocks = <&topckgen CLK_TOP_USB_PHY48M>;
+ clock-names = "ref";
+ #phy-cells = <1>;
+ status = "okay";
+ };
+ };
+
ethsys: syscon@1b000000 {
compatible = "mediatek,mt2701-ethsys", "syscon";
reg = <0 0x1b000000 0 0x1000>;
--
1.9.1
From: Min Guo <[email protected]>
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 <[email protected]>
Signed-off-by: Yonglong Wu <[email protected]>
---
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 <[email protected]>
+ * Yonglong Wu <[email protected]>
+ */
+
+#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 <[email protected]>");
+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
From: Min Guo <[email protected]>
This adds support for MediaTek musb controller in
host, peripheral and otg mode.
Signed-off-by: Min Guo <[email protected]>
---
.../devicetree/bindings/usb/mediatek,musb.txt | 43 ++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/mediatek,musb.txt
diff --git a/Documentation/devicetree/bindings/usb/mediatek,musb.txt b/Documentation/devicetree/bindings/usb/mediatek,musb.txt
new file mode 100644
index 0000000..3e3f671
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/mediatek,musb.txt
@@ -0,0 +1,43 @@
+MediaTek musb DRD/OTG controller
+-------------------------------------------
+
+Required properties:
+ - compatible : should be "mediatek,mtk-musb"
+ - reg : specifies physical base address and size of
+ the registers
+ - interrupts : interrupt used by musb controller
+ - interrupt-names : must be "mc"
+ - phys : PHY specifier for the OTG phy
+ - dr_mode : should be one of "host", "peripheral" or "otg",
+ refer to usb/generic.txt
+ - clocks : a list of phandle + clock-specifier pairs, one for
+ each entry in clock-names
+ - clock-names : must contain "main", "mcu", "univpll"
+ for clocks of controller
+
+Optional properties:
+ - extcon : external connector for VBUS and IDPIN changes detection,
+ needed when supports dual-role mode.
+ - vbus-supply : reference to the VBUS regulator, needed when supports
+ dual-role mode.
+ - power-domains : a phandle to USB power domain node to control USB's
+ MTCMOS
+
+Example:
+
+usb2: usb@11200000 {
+ compatible = "mediatek,mt2701-musb",
+ "mediatek,mtk-musb";
+ reg = <0 0x11200000 0 0x1000>;
+ interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
+ interrupt-names = "mc";
+ phys = <&u2port2 PHY_TYPE_USB2>;
+ vbus-supply = <&usb_vbus>;
+ extcon = <&extcon_usb>;
+ dr_mode = "otg";
+ clocks = <&pericfg CLK_PERI_USB0>,
+ <&pericfg CLK_PERI_USB0_MCU>,
+ <&pericfg CLK_PERI_USB_SLV>;
+ clock-names = "main","mcu","univpll";
+ power-domains = <&scpsys MT2701_POWER_DOMAIN_IFR_MSC>;
+};
--
1.9.1
From: Min Guo <[email protected]>
Add a common interface for set data toggle
Signed-off-by: Min Guo <[email protected]>
---
drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
1 file changed, 23 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index b59ce9a..16d0ba4 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int 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;
+
+ return csr;
+}
+
/*
* Advance this hardware endpoint's queue, completing the specified URB and
* advancing to either the next URB queued to that qh, or else invalidating
@@ -772,13 +791,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
);
csr |= MUSB_TXCSR_MODE;
- if (!hw_ep->tx_double_buffered) {
- if (usb_gettoggle(urb->dev, qh->epnum, 1))
- csr |= MUSB_TXCSR_H_WR_DATATOGGLE
- | MUSB_TXCSR_H_DATATOGGLE;
- else
- csr |= MUSB_TXCSR_CLRDATATOG;
- }
+ if (!hw_ep->tx_double_buffered)
+ csr |= musb_set_toggle(qh, !is_out, urb);
musb_writew(epio, MUSB_TXCSR, csr);
/* REVISIT may need to clear FLUSHFIFO ... */
@@ -860,17 +874,12 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
/* IN/receive */
} else {
- u16 csr;
+ u16 csr = 0;
if (hw_ep->rx_reinit) {
musb_rx_reinit(musb, qh, epnum);
+ csr |= musb_set_toggle(qh, !is_out, urb);
- /* init new state: toggle and NYET, maybe DMA later */
- if (usb_gettoggle(urb->dev, qh->epnum, 0))
- csr = MUSB_RXCSR_H_WR_DATATOGGLE
- | MUSB_RXCSR_H_DATATOGGLE;
- else
- csr = 0;
if (qh->type == USB_ENDPOINT_XFER_INT)
csr |= MUSB_RXCSR_DISNYET;
--
1.9.1
On 15/01/2019 02:43, [email protected] wrote:
> From: Min Guo <[email protected]>
>
> Add a common interface for set data toggle
>
> Signed-off-by: Min Guo <[email protected]>
> ---
> drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> 1 file changed, 23 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> index b59ce9a..16d0ba4 100644
> --- a/drivers/usb/musb/musb_host.c
> +++ b/drivers/usb/musb/musb_host.c
> @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int 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;
Can we switch the if and use is_out logic as function parameter. This would make
the code easier to understand.
Regards,
Matthias
> +
> + return csr;
> +}
> +
> /*
> * Advance this hardware endpoint's queue, completing the specified URB and
> * advancing to either the next URB queued to that qh, or else invalidating
> @@ -772,13 +791,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
> );
> csr |= MUSB_TXCSR_MODE;
>
> - if (!hw_ep->tx_double_buffered) {
> - if (usb_gettoggle(urb->dev, qh->epnum, 1))
> - csr |= MUSB_TXCSR_H_WR_DATATOGGLE
> - | MUSB_TXCSR_H_DATATOGGLE;
> - else
> - csr |= MUSB_TXCSR_CLRDATATOG;
> - }
> + if (!hw_ep->tx_double_buffered)
> + csr |= musb_set_toggle(qh, !is_out, urb);
>
> musb_writew(epio, MUSB_TXCSR, csr);
> /* REVISIT may need to clear FLUSHFIFO ... */
> @@ -860,17 +874,12 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
>
> /* IN/receive */
> } else {
> - u16 csr;
> + u16 csr = 0;
>
> if (hw_ep->rx_reinit) {
> musb_rx_reinit(musb, qh, epnum);
> + csr |= musb_set_toggle(qh, !is_out, urb);
>
> - /* init new state: toggle and NYET, maybe DMA later */
> - if (usb_gettoggle(urb->dev, qh->epnum, 0))
> - csr = MUSB_RXCSR_H_WR_DATATOGGLE
> - | MUSB_RXCSR_H_DATATOGGLE;
> - else
> - csr = 0;
> if (qh->type == USB_ENDPOINT_XFER_INT)
> csr |= MUSB_RXCSR_DISNYET;
>
>
Hi Min,
On Tue, Jan 15, 2019 at 04:19:42PM +0100, Matthias Brugger wrote:
>
>
> On 15/01/2019 02:43, [email protected] wrote:
> > From: Min Guo <[email protected]>
> >
> > Add a common interface for set data toggle
> >
> > Signed-off-by: Min Guo <[email protected]>
> > ---
> > drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> > 1 file changed, 23 insertions(+), 14 deletions(-)
> >
> > diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> > index b59ce9a..16d0ba4 100644
> > --- a/drivers/usb/musb/musb_host.c
> > +++ b/drivers/usb/musb/musb_host.c
> > @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int 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;
>
> Can we switch the if and use is_out logic as function parameter. This would make
> the code easier to understand.
based on the current implementation in patch 4/4, I don't think we need
this separate patch any more, but Matthias' comments still apply.
Regards,
-Bin.
Hi Min,
very close, thanks.
Below I tried to explain a further cleanup in musb_clearb/w() and
musb_get/set_toggle() implementation. Please let me know if it is not
clear.
Basically, we don't need musb_default_clearb/w(), just assign the
musb_io function pointers to musb_readb/w().
Then the mtk platform musb_clearb/w() calls musb_readb/w() and
musb_writeb/w() to handle W1C.
On Tue, Jan 15, 2019 at 09:43:46AM +0800, [email protected] wrote:
> From: Min Guo <[email protected]>
>
> 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 <[email protected]>
> Signed-off-by: Yonglong Wu <[email protected]>
> ---
> 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 <[email protected]>
> + * Yonglong Wu <[email protected]>
> + */
> +
> +#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)
missing a TAB for the alignment?
> +#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)
add one more TAB for params.
> +{
> + 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)
remove 'u8 data' parameter, then add:
> +{
u8 data;
> + /* W1C */
data = musb_readb(addr, offset);
> + musb_writeb(addr, offset, data);
> +}
> +
> +static void mtk_musb_clearw(void __iomem *addr, unsigned int offset, u16 data)
> +{
> + /* W1C */
> + musb_writew(addr, offset, data);
> +}
similar as mtk_musb_clearb() above.
> +
> +static int mtk_musb_init(struct musb *musb)
> +{
> + struct device *dev = musb->controller;
> + struct mtk_glue *glue = dev_get_drvdata(dev->parent);
> + int ret;
[snip]
> + if (pdata->mode == USB_DR_MODE_OTG)
> + mtk_otg_switch_init(glue);
> +
> + dev_info(dev, "USB probe done!\n");
not really useful, can be removed.
> + 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 <[email protected]>");
> +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)
> +{
> +}
don't need this, use musb_readb() for the function pointer.
> +
> 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)
> +{
> +}
don't need this, use musb_readw() for the function pointer.
> +
> +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;
no need to assign them 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);
replace the 3 line above with
musb_clearb/w();
> +
> + /* 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));
then those are no longer needed.
> }
>
> 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;
else
musb_clearb = musb_readb;
> 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;
else
musb_clearw = musb_readw;
>
> #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,
add "could be clear-on-read or W1C" to give more info.
> * @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);
> }
Those two functions - musb_save_toggle() and musb_set_toggle() are very
short now, we can get rid of them, and directly use
musb->io.get/set_toggle().
>
> /*
> 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);
regards,
-Bin.
Hi Bin,
On Tue, 2019-01-15 at 14:40 -0600, Bin Liu wrote:
> Hi Min,
>
> On Tue, Jan 15, 2019 at 04:19:42PM +0100, Matthias Brugger wrote:
> >
> >
> > On 15/01/2019 02:43, [email protected] wrote:
> > > From: Min Guo <[email protected]>
> > >
> > > Add a common interface for set data toggle
> > >
> > > Signed-off-by: Min Guo <[email protected]>
> > > ---
> > > drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> > > 1 file changed, 23 insertions(+), 14 deletions(-)
> > >
> > > diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> > > index b59ce9a..16d0ba4 100644
> > > --- a/drivers/usb/musb/musb_host.c
> > > +++ b/drivers/usb/musb/musb_host.c
> > > @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int 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;
> >
> > Can we switch the if and use is_out logic as function parameter. This would make
> > the code easier to understand.
>
> based on the current implementation in patch 4/4, I don't think we need
> this separate patch any more, but Matthias' comments still apply.
Okay.
> Regards,
> -Bin.
Hi Bin,
On Tue, 2019-01-15 at 14:38 -0600, Bin Liu wrote:
> Hi Min,
>
> very close, thanks.
> Below I tried to explain a further cleanup in musb_clearb/w() and
> musb_get/set_toggle() implementation. Please let me know if it is not
> clear.
>
> Basically, we don't need musb_default_clearb/w(), just assign the
> musb_io function pointers to musb_readb/w().
>
> Then the mtk platform musb_clearb/w() calls musb_readb/w() and
> musb_writeb/w() to handle W1C.
Okay.
> On Tue, Jan 15, 2019 at 09:43:46AM +0800, [email protected] wrote:
> > From: Min Guo <[email protected]>
> >
> > 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 <[email protected]>
> > Signed-off-by: Yonglong Wu <[email protected]>
> > ---
> > 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 <[email protected]>
> > + * Yonglong Wu <[email protected]>
> > + */
> > +
> > +#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)
>
> missing a TAB for the alignment?
Okay.
> > +#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)
>
> add one more TAB for params.
Okay.
> > +{
> > + 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)
>
> remove 'u8 data' parameter, then add:
Okay.
> > +{
>
> u8 data;
>
> > + /* W1C */
> data = musb_readb(addr, offset);
> > + musb_writeb(addr, offset, data);
> > +}
> > +
> > +static void mtk_musb_clearw(void __iomem *addr, unsigned int offset, u16 data)
> > +{
> > + /* W1C */
> > + musb_writew(addr, offset, data);
> > +}
>
> similar as mtk_musb_clearb() above.
Okay.
> > +
> > +static int mtk_musb_init(struct musb *musb)
> > +{
> > + struct device *dev = musb->controller;
> > + struct mtk_glue *glue = dev_get_drvdata(dev->parent);
> > + int ret;
>
> [snip]
>
> > + if (pdata->mode == USB_DR_MODE_OTG)
> > + mtk_otg_switch_init(glue);
> > +
> > + dev_info(dev, "USB probe done!\n");
>
> not really useful, can be removed.
Okay.
> > + 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 <[email protected]>");
> > +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)
> > +{
> > +}
>
> don't need this, use musb_readb() for the function pointer.
Okay.
> > +
> > 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)
> > +{
> > +}
>
> don't need this, use musb_readw() for the function pointer.
Okay.
> > +
> > +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;
>
> no need to assign them 0.
Okay.
> > +
> > + 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);
>
> replace the 3 line above with
> musb_clearb/w();
Okay.
> > +
> > + /* 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));
>
> then those are no longer needed.
Okay.
> > }
> >
> > 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;
> else
> musb_clearb = musb_readb;
Okay.
> > 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;
> else
> musb_clearw = musb_readw;
Okay.
> >
> > #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,
>
> add "could be clear-on-read or W1C" to give more info.
Okay.
> > * @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);
> > }
>
> Those two functions - musb_save_toggle() and musb_set_toggle() are very
> short now, we can get rid of them, and directly use
> musb->io.get/set_toggle().
Okay.
> >
> > /*
> > 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);
>
> regards,
> -Bin.
Hi Matthias,
On Tue, 2019-01-15 at 16:19 +0100, Matthias Brugger wrote:
>
> On 15/01/2019 02:43, [email protected] wrote:
> > From: Min Guo <[email protected]>
> >
> > Add a common interface for set data toggle
> >
> > Signed-off-by: Min Guo <[email protected]>
> > ---
> > drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> > 1 file changed, 23 insertions(+), 14 deletions(-)
> >
> > diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> > index b59ce9a..16d0ba4 100644
> > --- a/drivers/usb/musb/musb_host.c
> > +++ b/drivers/usb/musb/musb_host.c
> > @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int 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;
>
> Can we switch the if and use is_out logic as function parameter. This would make
> the code easier to understand.
Okay.
> Regards,
> Matthias
>
> > +
> > + return csr;
> > +}
> > +
> > /*
> > * Advance this hardware endpoint's queue, completing the specified URB and
> > * advancing to either the next URB queued to that qh, or else invalidating
> > @@ -772,13 +791,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
> > );
> > csr |= MUSB_TXCSR_MODE;
> >
> > - if (!hw_ep->tx_double_buffered) {
> > - if (usb_gettoggle(urb->dev, qh->epnum, 1))
> > - csr |= MUSB_TXCSR_H_WR_DATATOGGLE
> > - | MUSB_TXCSR_H_DATATOGGLE;
> > - else
> > - csr |= MUSB_TXCSR_CLRDATATOG;
> > - }
> > + if (!hw_ep->tx_double_buffered)
> > + csr |= musb_set_toggle(qh, !is_out, urb);
> >
> > musb_writew(epio, MUSB_TXCSR, csr);
> > /* REVISIT may need to clear FLUSHFIFO ... */
> > @@ -860,17 +874,12 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
> >
> > /* IN/receive */
> > } else {
> > - u16 csr;
> > + u16 csr = 0;
> >
> > if (hw_ep->rx_reinit) {
> > musb_rx_reinit(musb, qh, epnum);
> > + csr |= musb_set_toggle(qh, !is_out, urb);
> >
> > - /* init new state: toggle and NYET, maybe DMA later */
> > - if (usb_gettoggle(urb->dev, qh->epnum, 0))
> > - csr = MUSB_RXCSR_H_WR_DATATOGGLE
> > - | MUSB_RXCSR_H_DATATOGGLE;
> > - else
> > - csr = 0;
> > if (qh->type == USB_ENDPOINT_XFER_INT)
> > csr |= MUSB_RXCSR_DISNYET;
> >
> >
Hi Bin,
On Tue, 2019-01-15 at 14:38 -0600, Bin Liu wrote:
> Hi Min,
>
> very close, thanks.
> Below I tried to explain a further cleanup in musb_clearb/w() and
> musb_get/set_toggle() implementation. Please let me know if it is not
> clear.
>
> Basically, we don't need musb_default_clearb/w(), just assign the
> musb_io function pointers to musb_readb/w().
>
> Then the mtk platform musb_clearb/w() calls musb_readb/w() and
> musb_writeb/w() to handle W1C.
Sorry to bother you again, I encounter a problem when prepare the patch.
The define of musb_clearb/w and musb_readb/w are difference as follow,
and cannot be directly assigned:
u8/u16 (*readb/w)(const void __iomem *addr, unsigned offset)
void (*clearb/w)(void __iomem *addr, unsigned int offset))
if modify clearb/w as:
u8/u16 (*clearb/w)(const void __iomem *addr, unsigned int offset))
then musb_clear needs writeb/w the const addr.
Can I delete const in (*readb/w)?
> regards,
> -Bin.
On Wed, Jan 16, 2019 at 05:39:02PM +0800, Min Guo wrote:
> Hi Bin,
>
> On Tue, 2019-01-15 at 14:38 -0600, Bin Liu wrote:
> > Hi Min,
> >
> > very close, thanks.
> > Below I tried to explain a further cleanup in musb_clearb/w() and
> > musb_get/set_toggle() implementation. Please let me know if it is not
> > clear.
> >
> > Basically, we don't need musb_default_clearb/w(), just assign the
> > musb_io function pointers to musb_readb/w().
> >
> > Then the mtk platform musb_clearb/w() calls musb_readb/w() and
> > musb_writeb/w() to handle W1C.
>
> Sorry to bother you again, I encounter a problem when prepare the patch.
no problem at all.
> The define of musb_clearb/w and musb_readb/w are difference as follow,
> and cannot be directly assigned:
> u8/u16 (*readb/w)(const void __iomem *addr, unsigned offset)
> void (*clearb/w)(void __iomem *addr, unsigned int offset))
>
> if modify clearb/w as:
> u8/u16 (*clearb/w)(const void __iomem *addr, unsigned int offset))
> then musb_clear needs writeb/w the const addr.
> Can I delete const in (*readb/w)?
yes, please create a separate patch for it, and for readl() as well,
and stating it is for implementing clearing W1C registers.
Regards,
-Bin.
On Wed, 2019-01-16 at 07:59 -0600, Bin Liu wrote:
> On Wed, Jan 16, 2019 at 05:39:02PM +0800, Min Guo wrote:
> > Hi Bin,
> >
> > On Tue, 2019-01-15 at 14:38 -0600, Bin Liu wrote:
> > > Hi Min,
> > >
> > > very close, thanks.
> > > Below I tried to explain a further cleanup in musb_clearb/w() and
> > > musb_get/set_toggle() implementation. Please let me know if it is not
> > > clear.
> > >
> > > Basically, we don't need musb_default_clearb/w(), just assign the
> > > musb_io function pointers to musb_readb/w().
> > >
> > > Then the mtk platform musb_clearb/w() calls musb_readb/w() and
> > > musb_writeb/w() to handle W1C.
> >
> > Sorry to bother you again, I encounter a problem when prepare the patch.
>
> no problem at all.
Thanks.
> > The define of musb_clearb/w and musb_readb/w are difference as follow,
> > and cannot be directly assigned:
> > u8/u16 (*readb/w)(const void __iomem *addr, unsigned offset)
> > void (*clearb/w)(void __iomem *addr, unsigned int offset))
> >
> > if modify clearb/w as:
> > u8/u16 (*clearb/w)(const void __iomem *addr, unsigned int offset))
> > then musb_clear needs writeb/w the const addr.
> > Can I delete const in (*readb/w)?
>
> yes, please create a separate patch for it, and for readl() as well,
> and stating it is for implementing clearing W1C registers.
Okay.
> Regards,
> -Bin.