[PATCH 07/15] musb: Add support for the Allwinner sunxi musb controller
Hans de Goede
hdegoede at redhat.com
Mon Mar 9 13:40:20 PDT 2015
This is based on initial code to get the Allwinner sunxi musb controller
supported by Chen-Yu Tsai and Roman Byshko.
This adds support for the Allwinner sunxi musb controller in both host only
and otg mode. Peripheral only mode is not supported, as no boards use that.
This has been tested on a cubietruck (A20 SoC) and an UTOO P66 tablet
(A13 SoC) with a variety of devices in host mode and with the g_serial gadget
driver in peripheral mode, plugging otg / host cables in/out a lot of times
in all possible imaginable plug orders.
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
.../bindings/usb/allwinner,sun4i-a10-musb.txt | 27 +
drivers/usb/musb/Kconfig | 9 +-
drivers/usb/musb/Makefile | 1 +
drivers/usb/musb/musb_core.h | 1 +
drivers/usb/musb/musb_gadget.c | 6 +
drivers/usb/musb/musb_virthub.c | 6 +
drivers/usb/musb/sunxi.c | 788 +++++++++++++++++++++
7 files changed, 837 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt
create mode 100644 drivers/usb/musb/sunxi.c
diff --git a/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt b/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt
new file mode 100644
index 0000000..22b6887
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt
@@ -0,0 +1,27 @@
+Allwinner sun4i A10 musb DRC/OTG controller
+-------------------------------------------
+
+Required properties:
+ - compatible : "allwinner,sun4i-a10-musb"
+ - reg : mmio address range of the musb controller
+ - clocks : clock specifier for the musb controller ahb gate clock
+ - interrupts : interrupt to which the musb controller is connected
+ - interrupt-names : must be "mc"
+ - phys : phy specifier for the otg phy
+ - phy-names : must be "usb"
+ - syscons : syscon specifier
+ - dr_mode : Dual-Role mode must be "host" or "otg"
+
+Example:
+
+ usb_otg: usb at 01c13000 {
+ compatible = "allwinner,sun4i-a10-musb";
+ reg = <0x01c13000 0x0400>;
+ clocks = <&ahb_gates 0>;
+ interrupts = <38>;
+ interrupt-names = "mc";
+ phys = <&usbphy 0>;
+ phy-names = "usb";
+ syscons = <&syscon>;
+ status = "disabled";
+ };
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 14e1628..8180a3a 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -5,7 +5,7 @@
# (M)HDRC = (Multipoint) Highspeed Dual-Role Controller
config USB_MUSB_HDRC
- tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
+ tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, AW, ...)'
depends on (USB || USB_GADGET)
help
Say Y here if your system has a dual role high speed USB
@@ -20,6 +20,8 @@ config USB_MUSB_HDRC
Analog Devices parts using this IP include Blackfin BF54x,
BF525 and BF527.
+ Allwinner SoCs using this IP include A10, A13, A20, ...
+
If you do not know what this is, please say N.
To compile this driver as a module, choose M here; the
@@ -60,6 +62,11 @@ endchoice
comment "Platform Glue Layer"
+config USB_MUSB_SUNXI
+ tristate "Allwinner (sunxi)"
+ depends on ARCH_SUNXI
+ select GENERIC_PHY
+
config USB_MUSB_DAVINCI
tristate "DaVinci"
depends on ARCH_DAVINCI_DMx
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index ba49501..f95befe 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_USB_MUSB_DA8XX) += da8xx.o
obj-$(CONFIG_USB_MUSB_BLACKFIN) += blackfin.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_AM335X_CHILD) += musb_am335x.o
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index ba8dd78..444b936 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -166,6 +166,7 @@ struct musb_io;
*/
struct musb_platform_ops {
+#define MUSB_SUN4I BIT(7)
#define MUSB_DMA_UX500 BIT(6)
#define MUSB_DMA_CPPI41 BIT(5)
#define MUSB_DMA_CPPI BIT(4)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index b2d9040..7d13eb9 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -2041,6 +2041,12 @@ void musb_g_disconnect(struct musb *musb)
spin_lock(&musb->lock);
}
+ /* On sunxi ep0 FADDR must be 0 when (re)entering peripheral mode */
+ if (musb->io.quirks & MUSB_SUN4I) {
+ musb_ep_select(musb->mregs, 0);
+ musb_writeb(musb->mregs, MUSB_FADDR, 0);
+ }
+
switch (musb->xceiv->otg->state) {
default:
dev_dbg(musb->controller, "Unhandled disconnect %s, setting a_idle\n",
diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index 294e159..3c87fd7 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -224,6 +224,12 @@ void musb_root_disconnect(struct musb *musb)
usb_hcd_poll_rh_status(musb->hcd);
musb->is_active = 0;
+ /* On sunxi ep0 FADDR must be 0 when (re)entering peripheral mode */
+ if (musb->io.quirks & MUSB_SUN4I) {
+ musb_ep_select(musb->mregs, 0);
+ musb_writeb(musb->mregs, MUSB_FADDR, 0);
+ }
+
switch (musb->xceiv->otg->state) {
case OTG_STATE_A_SUSPEND:
if (otg->host->b_hnp_enable) {
diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
new file mode 100644
index 0000000..a566040
--- /dev/null
+++ b/drivers/usb/musb/sunxi.c
@@ -0,0 +1,788 @@
+/*
+ * Allwinner sun4i MUSB Glue Layer
+ *
+ * Copyright (C) 2015 Hans de Goede <hdegoede at redhat.com>
+ *
+ * Based on code from
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/sun4i-sc.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/phy/phy-sun4i-usb.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/usb/musb.h>
+#include <linux/usb/of.h>
+#include <linux/usb/usb_phy_generic.h>
+#include <linux/workqueue.h>
+#include "musb_core.h"
+
+/*
+ * Note do not raise the debounce time, we must report Vusb high within 100ms
+ * of a session being requested otherwise we get Vbus errors
+ */
+#define SUNXI_MUSB_DEBOUNCE_TIME msecs_to_jiffies(50)
+#define SUNXI_MUSB_POLL_TIME msecs_to_jiffies(250)
+
+/*
+ * Register offsets, note sunxi musb has a different layout then most
+ * musb implementations, we translate the layout in musb_readb & friends.
+ */
+#define SUNXI_MUSB_POWER 0x0040
+#define SUNXI_MUSB_DEVCTL 0x0041
+#define SUNXI_MUSB_INDEX 0x0042
+#define SUNXI_MUSB_VEND0 0x0043
+#define SUNXI_MUSB_INTRTX 0x0044
+#define SUNXI_MUSB_INTRRX 0x0046
+#define SUNXI_MUSB_INTRTXE 0x0048
+#define SUNXI_MUSB_INTRRXE 0x004a
+#define SUNXI_MUSB_INTRUSB 0x004c
+#define SUNXI_MUSB_INTRUSBE 0x0050
+#define SUNXI_MUSB_FRAME 0x0054
+#define SUNXI_MUSB_TXFIFOSZ 0x0090
+#define SUNXI_MUSB_TXFIFOADD 0x0092
+#define SUNXI_MUSB_RXFIFOSZ 0x0094
+#define SUNXI_MUSB_RXFIFOADD 0x0096
+#define SUNXI_MUSB_FADDR 0x0098
+#define SUNXI_MUSB_TXFUNCADDR 0x0098
+#define SUNXI_MUSB_TXHUBADDR 0x009a
+#define SUNXI_MUSB_TXHUBPORT 0x009b
+#define SUNXI_MUSB_RXFUNCADDR 0x009c
+#define SUNXI_MUSB_RXHUBADDR 0x009e
+#define SUNXI_MUSB_RXHUBPORT 0x009f
+#define SUNXI_MUSB_CONFIGDATA 0x00c0
+
+/* VEND0 bits */
+#define SUNXI_MUSB_VEND0_PIO_MODE 0
+
+/* ISCR, Interface Status and Control bits */
+#define SUNXI_ISCR_ID_PULLUP_EN (1 << 17)
+#define SUNXI_ISCR_DPDM_PULLUP_EN (1 << 16)
+/* sunxi has the phy id/vbus pins not connected, so we use the force bits */
+#define SUNXI_ISCR_FORCE_ID_MASK (3 << 14)
+#define SUNXI_ISCR_FORCE_ID_LOW (2 << 14)
+#define SUNXI_ISCR_FORCE_ID_HIGH (3 << 14)
+#define SUNXI_ISCR_FORCE_VBUS_MASK (3 << 12)
+#define SUNXI_ISCR_FORCE_VBUS_LOW (2 << 12)
+#define SUNXI_ISCR_FORCE_VBUS_HIGH (3 << 12)
+
+/* Our read/write methods need access and do not get passed in a musb ref :| */
+struct musb *sunxi_musb;
+
+struct sunxi_glue {
+ struct device *dev;
+ struct platform_device *musb;
+ struct regmap *sc;
+ struct clk *clk;
+ struct phy *phy;
+ struct platform_device *usb_phy;
+ struct usb_phy *xceiv;
+ struct gpio_desc *id_det_gpio;
+ struct gpio_desc *vbus_det_gpio;
+ int id_det_irq;
+ int vbus_det_irq;
+ u8 id_det;
+ u8 vbus_det;
+ u8 vbus_on;
+ u8 enabled;
+ struct delayed_work detect;
+};
+
+static void sunxi_musb_force_id(struct musb *musb, u32 val)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+
+ if (val)
+ val = SUNXI_ISCR_FORCE_ID_HIGH;
+ else
+ val = SUNXI_ISCR_FORCE_ID_LOW;
+
+ sun4i_usb_phy_update_iscr(glue->phy, SUNXI_ISCR_FORCE_ID_MASK, val);
+}
+
+static void sunxi_musb_force_vbus(struct musb *musb, u32 val)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+
+ if (val)
+ val = SUNXI_ISCR_FORCE_VBUS_HIGH;
+ else
+ val = SUNXI_ISCR_FORCE_VBUS_LOW;
+
+ sun4i_usb_phy_update_iscr(glue->phy, SUNXI_ISCR_FORCE_VBUS_MASK, val);
+}
+
+/* Called with musb locked */
+static void sunxi_musb_set_vbus(struct musb *musb, int is_on)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+
+ if (is_on) {
+ /* Turn on Vbus only if we don't have an ext. Vbus */
+ if (!glue->vbus_on && !glue->vbus_det) {
+ phy_power_on(glue->phy);
+ glue->vbus_on = 1;
+ }
+ } else {
+ if (glue->vbus_on) {
+ phy_power_off(glue->phy);
+ glue->vbus_on = 0;
+ }
+ }
+}
+
+static void sunxi_musb_id_vbus_det_scan(struct work_struct *work)
+{
+ struct sunxi_glue *glue =
+ container_of(work, struct sunxi_glue, detect.work);
+ struct musb *musb = dev_get_drvdata(&glue->musb->dev);
+ u8 id_det, vbus_det, devctl, set_vbus = 0, rescan = 0;
+ unsigned long delay, flags;
+
+ id_det = gpiod_get_value_cansleep(glue->id_det_gpio);
+ vbus_det = gpiod_get_value_cansleep(glue->vbus_det_gpio);
+
+ spin_lock_irqsave(&musb->lock, flags);
+
+ if (!glue->enabled) {
+ spin_unlock_irqrestore(&musb->lock, flags);
+ return;
+ }
+
+ if (vbus_det != glue->vbus_det) {
+ sunxi_musb_force_vbus(musb, vbus_det);
+ glue->vbus_det = vbus_det;
+ }
+
+ if (id_det != glue->id_det) {
+ sunxi_musb_force_id(musb, id_det);
+ devctl = readb(musb->mregs + SUNXI_MUSB_DEVCTL);
+ if (id_det == 0) {
+ sunxi_musb_set_vbus(musb, 1);
+ set_vbus = 1;
+ musb->xceiv->otg->default_a = 1;
+ musb->xceiv->otg->state = OTG_STATE_A_IDLE;
+ MUSB_HST_MODE(musb);
+ devctl |= MUSB_DEVCTL_SESSION;
+ } else {
+ sunxi_musb_set_vbus(musb, 0);
+ /*
+ * Vbus typically slowly discharges, sometimes this
+ * causes the Vbus gpio to not trigger an edge irq
+ * on Vbus off, so force a rescan.
+ */
+ rescan = 1;
+ musb->xceiv->otg->default_a = 0;
+ musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+ MUSB_DEV_MODE(musb);
+ devctl &= ~MUSB_DEVCTL_SESSION;
+ }
+ writeb(devctl, musb->mregs + SUNXI_MUSB_DEVCTL);
+ glue->id_det = id_det;
+ }
+
+ /* If one of the pins does not support irqs, we must poll */
+ if (glue->id_det_irq < 0 || glue->vbus_det_irq < 0 || rescan) {
+ delay = set_vbus ? SUNXI_MUSB_DEBOUNCE_TIME :
+ SUNXI_MUSB_POLL_TIME;
+ queue_delayed_work(system_wq, &glue->detect, delay);
+ }
+
+ spin_unlock_irqrestore(&musb->lock, flags);
+}
+
+static irqreturn_t sunxi_musb_id_vbus_det_irq(int irq, void *dev_id)
+{
+ struct sunxi_glue *glue = dev_id;
+
+ /* vbus or id changed, let the pins settle and then scan them */
+ queue_delayed_work(system_wq, &glue->detect, SUNXI_MUSB_DEBOUNCE_TIME);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci)
+{
+ struct musb *musb = __hci;
+ unsigned long flags;
+
+ spin_lock_irqsave(&musb->lock, flags);
+
+ musb->int_usb = readb(musb->mregs + SUNXI_MUSB_INTRUSB);
+ if (musb->int_usb)
+ writeb(musb->int_usb, musb->mregs + SUNXI_MUSB_INTRUSB);
+
+ /*
+ * sunxi musb often signals babble on low / full speed device
+ * disconnect, without ever raising MUSB_INTR_DISCONNECT, since
+ * normally babble never happens treat it as disconnect.
+ */
+ if ((musb->int_usb & MUSB_INTR_BABBLE) && is_host_active(musb)) {
+ musb->int_usb &= ~MUSB_INTR_BABBLE;
+ musb->int_usb |= MUSB_INTR_DISCONNECT;
+ }
+
+ musb->int_tx = readw(musb->mregs + SUNXI_MUSB_INTRTX);
+ if (musb->int_tx)
+ writew(musb->int_tx, musb->mregs + SUNXI_MUSB_INTRTX);
+
+ musb->int_rx = readw(musb->mregs + SUNXI_MUSB_INTRRX);
+ if (musb->int_rx)
+ writew(musb->int_rx, musb->mregs + SUNXI_MUSB_INTRRX);
+
+ musb_interrupt(musb);
+
+ spin_unlock_irqrestore(&musb->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+static int sunxi_musb_init(struct musb *musb)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+ int ret;
+
+ sunxi_musb = musb;
+ musb->phy = glue->phy;
+ musb->xceiv = glue->xceiv;
+
+ ret = regmap_update_bits(glue->sc, SUN4I_SC1,
+ SUN4I_SC1_SRAM_D_MAP_USB0, 1);
+ if (ret)
+ return ret;
+
+ ret = phy_init(glue->phy);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(glue->clk);
+ if (ret) {
+ phy_exit(glue->phy);
+ return ret;
+ }
+
+ musb->isr = sunxi_musb_interrupt;
+
+ sun4i_usb_phy_update_iscr(glue->phy, 0, SUNXI_ISCR_DPDM_PULLUP_EN);
+ sun4i_usb_phy_update_iscr(glue->phy, 0, SUNXI_ISCR_ID_PULLUP_EN);
+
+ switch (musb->port_mode) {
+ case MUSB_PORT_MODE_HOST:
+ sunxi_musb_force_id(musb, 0);
+ sunxi_musb_force_vbus(musb, 1);
+ sunxi_musb_set_vbus(musb, 1);
+ break;
+ case MUSB_PORT_MODE_DUAL_ROLE:
+ sunxi_musb_force_id(musb, 1);
+ sunxi_musb_force_vbus(musb, 0);
+ glue->id_det = 1;
+ glue->vbus_det = 0;
+ break;
+ }
+
+ /* Stop the musb-core from doing runtime pm (not supported on sunxi) */
+ pm_runtime_get(musb->controller);
+
+ return 0;
+}
+
+static int sunxi_musb_exit(struct musb *musb)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+
+ pm_runtime_put(musb->controller);
+
+ sun4i_usb_phy_update_iscr(glue->phy, SUNXI_ISCR_DPDM_PULLUP_EN, 0);
+ sun4i_usb_phy_update_iscr(glue->phy, SUNXI_ISCR_ID_PULLUP_EN, 0);
+
+ cancel_delayed_work_sync(&glue->detect);
+ clk_disable_unprepare(glue->clk);
+ if (glue->vbus_on)
+ phy_power_off(glue->phy);
+ phy_exit(glue->phy);
+
+ return 0;
+}
+
+/* Called with musb locked */
+static void sunxi_musb_enable(struct musb *musb)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+ int ret;
+
+ /* musb_core does not call us in a balanced manner */
+ if (glue->enabled)
+ return;
+
+ glue->enabled = 1;
+
+ writeb(SUNXI_MUSB_VEND0_PIO_MODE, musb->mregs + SUNXI_MUSB_VEND0);
+
+ if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE)
+ return;
+
+ if (glue->id_det_irq >= 0) {
+ ret = devm_request_irq(glue->dev, glue->id_det_irq,
+ sunxi_musb_id_vbus_det_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ "musb-id-det", glue);
+ if (ret) {
+ dev_err(glue->dev,
+ "Error requesting id-det-irq: %d\n", ret);
+ glue->id_det_irq = -1;
+ }
+ }
+
+ if (glue->vbus_det_irq >= 0) {
+ ret = devm_request_irq(glue->dev, glue->vbus_det_irq,
+ sunxi_musb_id_vbus_det_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ "musb-vbus-det", glue);
+ if (ret) {
+ dev_err(glue->dev,
+ "Error requesting vbus-det-irq: %d\n", ret);
+ glue->vbus_det_irq = -1;
+ }
+ }
+
+ /* Scan current status / start scanning */
+ queue_delayed_work(system_wq, &glue->detect, 0);
+}
+
+/* Called with musb locked */
+static void sunxi_musb_disable(struct musb *musb)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+
+ /* musb_core does not call us in a balanced manner */
+ if (glue->enabled == 0)
+ return;
+
+ glue->enabled = 0;
+
+ if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE)
+ return;
+
+ if (glue->id_det_irq >= 0)
+ free_irq(glue->id_det_irq, glue);
+
+ if (glue->vbus_det_irq >= 0)
+ free_irq(glue->vbus_det_irq, glue);
+}
+
+/*
+ * sunxi musb register layout
+ * 0x00 - 0x17 fifo regs, 1 long per fifo
+ * 0x40 - 0x57 generic control regs (power - frame)
+ * 0x80 - 0x8f ep control regs (addressed through hw_ep->regs, indexed)
+ * 0x90 - 0x97 fifo control regs (indexed)
+ * 0x98 - 0x9f multipoint / busctl regs (indexed)
+ * 0xc0 configdata reg
+ */
+
+static u32 sunxi_musb_fifo_offset(u8 epnum)
+{
+ return (epnum * 4);
+}
+
+static u32 sunxi_musb_ep_offset(u8 epnum, u16 offset)
+{
+ WARN_ONCE(offset != 0,
+ "sunxi_musb_ep_offset called with non 0 offset\n");
+
+ return 0x80; /* indexed, so ignore epnum */
+}
+
+static u32 sunxi_musb_busctl_offset(u8 epnum, u16 offset)
+{
+ return SUNXI_MUSB_TXFUNCADDR + offset;
+}
+
+static u8 sunxi_musb_readb(const void __iomem *addr, unsigned offset)
+{
+ if (addr == sunxi_musb->mregs) {
+ /* generic control or fifo control reg access */
+ switch (offset) {
+ case MUSB_FADDR:
+ return readb(addr + SUNXI_MUSB_FADDR);
+ case MUSB_POWER:
+ return readb(addr + SUNXI_MUSB_POWER);
+ case MUSB_INTRUSB:
+ return readb(addr + SUNXI_MUSB_INTRUSB);
+ case MUSB_INTRUSBE:
+ return readb(addr + SUNXI_MUSB_INTRUSBE);
+ case MUSB_INDEX:
+ return readb(addr + SUNXI_MUSB_INDEX);
+ case MUSB_TESTMODE:
+ return 0; /* No testmode on sunxi */
+ case MUSB_DEVCTL:
+ return readb(addr + SUNXI_MUSB_DEVCTL);
+ case MUSB_TXFIFOSZ:
+ return readb(addr + SUNXI_MUSB_TXFIFOSZ);
+ case MUSB_RXFIFOSZ:
+ return readb(addr + SUNXI_MUSB_RXFIFOSZ);
+ case MUSB_CONFIGDATA + 0x10: /* See musb_read_configdata() */
+ return readb(addr + SUNXI_MUSB_CONFIGDATA);
+ /* Offset for these is fixed by sunxi_musb_busctl_offset() */
+ case SUNXI_MUSB_TXFUNCADDR:
+ case SUNXI_MUSB_TXHUBADDR:
+ case SUNXI_MUSB_TXHUBPORT:
+ case SUNXI_MUSB_RXFUNCADDR:
+ case SUNXI_MUSB_RXHUBADDR:
+ case SUNXI_MUSB_RXHUBPORT:
+ /* multipoint / busctl reg access */
+ return readb(addr + offset);
+ default:
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown readb offset %u\n", offset);
+ return 0;
+ }
+ } else if (addr == (sunxi_musb->mregs + 0x80)) {
+ /* ep control reg access */
+ /* sunxi has a 2 byte hole before the txtype register */
+ if (offset >= MUSB_TXTYPE)
+ offset += 2;
+ return readb(addr + offset);
+ }
+
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown readb at 0x%x bytes offset\n",
+ (int)(addr - sunxi_musb->mregs));
+ return 0;
+}
+
+static void sunxi_musb_writeb(void __iomem *addr, unsigned offset, u8 data)
+{
+ if (addr == sunxi_musb->mregs) {
+ /* generic control or fifo control reg access */
+ switch (offset) {
+ case MUSB_FADDR:
+ return writeb(data, addr + SUNXI_MUSB_FADDR);
+ case MUSB_POWER:
+ return writeb(data, addr + SUNXI_MUSB_POWER);
+ case MUSB_INTRUSB:
+ return writeb(data, addr + SUNXI_MUSB_INTRUSB);
+ case MUSB_INTRUSBE:
+ return writeb(data, addr + SUNXI_MUSB_INTRUSBE);
+ case MUSB_INDEX:
+ return writeb(data, addr + SUNXI_MUSB_INDEX);
+ case MUSB_TESTMODE:
+ if (data)
+ dev_warn(sunxi_musb->controller->parent,
+ "sunxi-musb does not have testmode\n");
+ return;
+ case MUSB_DEVCTL:
+ return writeb(data, addr + SUNXI_MUSB_DEVCTL);
+ case MUSB_TXFIFOSZ:
+ return writeb(data, addr + SUNXI_MUSB_TXFIFOSZ);
+ case MUSB_RXFIFOSZ:
+ return writeb(data, addr + SUNXI_MUSB_RXFIFOSZ);
+ /* Offset for these is fixed by sunxi_musb_busctl_offset() */
+ case SUNXI_MUSB_TXFUNCADDR:
+ case SUNXI_MUSB_TXHUBADDR:
+ case SUNXI_MUSB_TXHUBPORT:
+ case SUNXI_MUSB_RXFUNCADDR:
+ case SUNXI_MUSB_RXHUBADDR:
+ case SUNXI_MUSB_RXHUBPORT:
+ /* multipoint / busctl reg access */
+ return writeb(data, addr + offset);
+ default:
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown writeb offset %u\n", offset);
+ return;
+ }
+ } else if (addr == (sunxi_musb->mregs + 0x80)) {
+ /* ep control reg access */
+ if (offset >= MUSB_TXTYPE)
+ offset += 2;
+ return writeb(data, addr + offset);
+ }
+
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown writeb at 0x%x bytes offset\n",
+ (int)(addr - sunxi_musb->mregs));
+}
+
+static u16 sunxi_musb_readw(const void __iomem *addr, unsigned offset)
+{
+ if (addr == sunxi_musb->mregs) {
+ /* generic control or fifo control reg access */
+ switch (offset) {
+ case MUSB_INTRTX:
+ return readw(addr + SUNXI_MUSB_INTRTX);
+ case MUSB_INTRRX:
+ return readw(addr + SUNXI_MUSB_INTRRX);
+ case MUSB_INTRTXE:
+ return readw(addr + SUNXI_MUSB_INTRTXE);
+ case MUSB_INTRRXE:
+ return readw(addr + SUNXI_MUSB_INTRRXE);
+ case MUSB_FRAME:
+ return readw(addr + SUNXI_MUSB_FRAME);
+ case MUSB_TXFIFOADD:
+ return readw(addr + SUNXI_MUSB_TXFIFOADD);
+ case MUSB_RXFIFOADD:
+ return readw(addr + SUNXI_MUSB_RXFIFOADD);
+ case MUSB_HWVERS:
+ return 0; /* sunxi musb version is not known */
+ default:
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown readw offset %u\n", offset);
+ return 0;
+ }
+ } else if (addr == (sunxi_musb->mregs + 0x80)) {
+ /* ep control reg access */
+ return readw(addr + offset);
+ }
+
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown readw at 0x%x bytes offset\n",
+ (int)(addr - sunxi_musb->mregs));
+ return 0;
+}
+
+static void sunxi_musb_writew(void __iomem *addr, unsigned offset, u16 data)
+{
+ if (addr == sunxi_musb->mregs) {
+ /* generic control or fifo control reg access */
+ switch (offset) {
+ case MUSB_INTRTX:
+ return writew(data, addr + SUNXI_MUSB_INTRTX);
+ case MUSB_INTRRX:
+ return writew(data, addr + SUNXI_MUSB_INTRRX);
+ case MUSB_INTRTXE:
+ return writew(data, addr + SUNXI_MUSB_INTRTXE);
+ case MUSB_INTRRXE:
+ return writew(data, addr + SUNXI_MUSB_INTRRXE);
+ case MUSB_FRAME:
+ return writew(data, addr + SUNXI_MUSB_FRAME);
+ case MUSB_TXFIFOADD:
+ return writew(data, addr + SUNXI_MUSB_TXFIFOADD);
+ case MUSB_RXFIFOADD:
+ return writew(data, addr + SUNXI_MUSB_RXFIFOADD);
+ default:
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown writew offset %u\n", offset);
+ return;
+ }
+ } else if (addr == (sunxi_musb->mregs + 0x80)) {
+ /* ep control reg access */
+ return writew(data, addr + offset);
+ }
+
+ dev_err(sunxi_musb->controller->parent,
+ "Error unknown writew at 0x%x bytes offset\n",
+ (int)(addr - sunxi_musb->mregs));
+}
+
+static const struct musb_platform_ops sunxi_musb_ops = {
+ .quirks = MUSB_INDEXED_EP | MUSB_SUN4I,
+ .init = sunxi_musb_init,
+ .exit = sunxi_musb_exit,
+ .enable = sunxi_musb_enable,
+ .disable = sunxi_musb_disable,
+ .fifo_offset = sunxi_musb_fifo_offset,
+ .ep_offset = sunxi_musb_ep_offset,
+ .busctl_offset = sunxi_musb_busctl_offset,
+ .readb = sunxi_musb_readb,
+ .writeb = sunxi_musb_writeb,
+ .readw = sunxi_musb_readw,
+ .writew = sunxi_musb_writew,
+ .set_vbus = sunxi_musb_set_vbus,
+};
+
+/* Allwinner OTG supports up to 5 endpoints */
+#define SUNXI_MUSB_MAX_EP_NUM 6
+#define SUNXI_MUSB_RAM_BITS 11
+
+static struct musb_fifo_cfg sunxi_musb_mode_cfg[] = {
+ MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(5, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
+};
+
+static struct musb_hdrc_config sunxi_musb_hdrc_config = {
+ .fifo_cfg = sunxi_musb_mode_cfg,
+ .fifo_cfg_size = ARRAY_SIZE(sunxi_musb_mode_cfg),
+ .multipoint = true,
+ .dyn_fifo = true,
+ .soft_con = true,
+ .num_eps = SUNXI_MUSB_MAX_EP_NUM,
+ .ram_bits = SUNXI_MUSB_RAM_BITS,
+ .dma = 0,
+};
+
+static int sunxi_musb_probe(struct platform_device *pdev)
+{
+ struct musb_hdrc_platform_data pdata;
+ struct platform_device_info pinfo;
+ struct sunxi_glue *glue;
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ if (!np) {
+ dev_err(&pdev->dev, "Error no device tree node found\n");
+ return -EINVAL;
+ }
+
+ memset(&pdata, 0, sizeof(pdata));
+ switch (of_usb_get_dr_mode(np)) {
+ case USB_DR_MODE_HOST:
+ pdata.mode = MUSB_PORT_MODE_HOST;
+ break;
+ case USB_DR_MODE_PERIPHERAL:
+ dev_err(&pdev->dev,
+ "Error peripheral only mode is not supported\n");
+ return -EINVAL;
+ case USB_DR_MODE_OTG:
+ pdata.mode = MUSB_PORT_MODE_DUAL_ROLE;
+ break;
+ default:
+ dev_err(&pdev->dev, "No 'dr_mode' property found\n");
+ return -EINVAL;
+ }
+ pdata.platform_ops = &sunxi_musb_ops;
+ pdata.config = &sunxi_musb_hdrc_config;
+
+ glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
+ if (!glue)
+ return -ENOMEM;
+
+ glue->dev = &pdev->dev;
+ INIT_DELAYED_WORK(&glue->detect, sunxi_musb_id_vbus_det_scan);
+
+ glue->sc = syscon_regmap_lookup_by_phandle(np, "syscons");
+ if (IS_ERR(glue->sc)) {
+ dev_err(&pdev->dev, "Error getting syscon %ld\n",
+ PTR_ERR(glue->sc));
+ return PTR_ERR(glue->sc);
+ }
+
+ glue->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(glue->clk)) {
+ dev_err(&pdev->dev, "Error getting clock: %ld\n",
+ PTR_ERR(glue->clk));
+ return PTR_ERR(glue->clk);
+ }
+
+ if (pdata.mode == MUSB_PORT_MODE_DUAL_ROLE) {
+ glue->id_det_gpio =
+ devm_gpiod_get(&pdev->dev, "id_det", GPIOD_IN);
+ if (IS_ERR(glue->id_det_gpio)) {
+ dev_err(&pdev->dev, "Error getting id_det gpio\n");
+ return PTR_ERR(glue->id_det_gpio);
+ }
+
+ glue->vbus_det_gpio =
+ devm_gpiod_get(&pdev->dev, "vbus_det", GPIOD_IN);
+ if (IS_ERR(glue->vbus_det_gpio)) {
+ dev_err(&pdev->dev, "Error getting vbus_det gpio\n");
+ return PTR_ERR(glue->vbus_det_gpio);
+ }
+
+ glue->id_det_irq = gpiod_to_irq(glue->id_det_gpio);
+ glue->vbus_det_irq = gpiod_to_irq(glue->vbus_det_gpio);
+ }
+
+ glue->phy = devm_phy_get(&pdev->dev, "usb");
+ if (IS_ERR(glue->phy)) {
+ if (PTR_ERR(glue->phy) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_err(&pdev->dev, "Error 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(&pdev->dev, "Error registering usb-phy %ld\n",
+ PTR_ERR(glue->usb_phy));
+ return PTR_ERR(glue->usb_phy);
+ }
+
+ glue->xceiv = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(glue->xceiv)) {
+ ret = PTR_ERR(glue->xceiv);
+ dev_err(&pdev->dev, "Error getting usb-phy %d\n", ret);
+ goto err_unregister_usb_phy;
+ }
+
+ platform_set_drvdata(pdev, glue);
+
+ memset(&pinfo, 0, sizeof(pinfo));
+ pinfo.name = "musb-hdrc";
+ pinfo.id = PLATFORM_DEVID_AUTO;
+ pinfo.parent = &pdev->dev;
+ pinfo.res = pdev->resource;
+ pinfo.num_res = pdev->num_resources;
+ pinfo.data = &pdata;
+ pinfo.size_data = sizeof(pdata);
+
+ glue->musb = platform_device_register_full(&pinfo);
+ if (IS_ERR(glue->musb)) {
+ ret = PTR_ERR(glue->musb);
+ dev_err(&pdev->dev, "Error registering musb dev: %d\n", ret);
+ goto err_unregister_usb_phy;
+ }
+
+ return 0;
+
+err_unregister_usb_phy:
+ usb_phy_generic_unregister(glue->usb_phy);
+ return ret;
+}
+
+static int sunxi_musb_remove(struct platform_device *pdev)
+{
+ struct sunxi_glue *glue = platform_get_drvdata(pdev);
+ struct platform_device *usb_phy = glue->usb_phy;
+
+ platform_device_unregister(glue->musb); /* Frees glue ! */
+ usb_phy_generic_unregister(usb_phy);
+
+ return 0;
+}
+
+static const struct of_device_id sunxi_musb_match[] = {
+ { .compatible = "allwinner,sun4i-a10-musb", },
+ {}
+};
+
+static struct platform_driver sunxi_musb_driver = {
+ .probe = sunxi_musb_probe,
+ .remove = sunxi_musb_remove,
+ .driver = {
+ .name = "musb-sunxi",
+ .of_match_table = sunxi_musb_match,
+ },
+};
+module_platform_driver(sunxi_musb_driver);
+
+MODULE_DESCRIPTION("Allwinner sunxi MUSB Glue Layer");
+MODULE_AUTHOR("Hans de Goede <hdegoede at redhat.com>");
+MODULE_LICENSE("GPL v2");
--
2.3.1
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