The ST-Ericsson DB8500 SoC contains a MUSB OTG controller which
supports both host and gadget mode. For some reason there is
nothing special about it - add a simple glue driver for Ux500
that literally just sets up MUSB together with a generic PHY.
There are no SoC-specific registers etc needed to make USB work.
The new Ux500 glue driver is only tested to work with DM_USB
and DM_USB_GADGET. Both host and gadget mode work fine on
the u8500 "stemmy" board that is already present in U-Boot.
Reviewed-by: Linus Walleij
Signed-off-by: Stephan Gerhold
---
(no changes since v1)
This patch could be applied separately from the first two if
needed. There is a functional runtime dependency but not
a compile time dependency with the PMIC changes in the first
two patches.
---
drivers/usb/musb-new/Kconfig | 11 +-
drivers/usb/musb-new/Makefile| 1 +
drivers/usb/musb-new/musb_core.c | 2 +-
drivers/usb/musb-new/ux500.c | 179 +++
4 files changed, 191 insertions(+), 2 deletions(-)
create mode 100644 drivers/usb/musb-new/ux500.c
diff --git a/drivers/usb/musb-new/Kconfig b/drivers/usb/musb-new/Kconfig
index fd6f4109b0..81ceea9740 100644
--- a/drivers/usb/musb-new/Kconfig
+++ b/drivers/usb/musb-new/Kconfig
@@ -72,6 +72,15 @@ config USB_MUSB_SUNXI
Say y here to enable support for the sunxi OTG / DRC USB controller
used on almost all sunxi boards.
+config USB_MUSB_UX500
+ bool "Enable ST-Ericsson Ux500 USB controller"
+ depends on DM_USB && DM_USB_GADGET && ARCH_U8500
+ default y
+ help
+ Say y to enable support for the MUSB OTG USB controller used in
+ ST-Ericsson Ux500. The driver supports either gadget or host mode
+ based on the selection of CONFIG_USB_MUSB_HOST.
+
config USB_MUSB_DISABLE_BULK_COMBINE_SPLIT
bool "Disable MUSB bulk split/combine"
default y
@@ -85,7 +94,7 @@ endif
config USB_MUSB_PIO_ONLY
bool "Disable DMA (always use PIO)"
- default y if USB_MUSB_AM35X || USB_MUSB_PIC32 || USB_MUSB_OMAP2PLUS ||
USB_MUSB_DSPS || USB_MUSB_SUNXI || USB_MUSB_MT85XX
+ default y if USB_MUSB_AM35X || USB_MUSB_PIC32 || USB_MUSB_OMAP2PLUS ||
USB_MUSB_DSPS || USB_MUSB_SUNXI || USB_MUSB_MT85XX || USB_MUSB_UX500
help
All data is copied between memory and FIFO by the CPU.
DMA controllers are ignored.
diff --git a/drivers/usb/musb-new/Makefile b/drivers/usb/musb-new/Makefile
index 6355eb12dd..396ff02654 100644
--- a/drivers/usb/musb-new/Makefile
+++ b/drivers/usb/musb-new/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_USB_MUSB_OMAP2PLUS) += omap2430.o
obj-$(CONFIG_USB_MUSB_PIC32) += pic32.o
obj-$(CONFIG_USB_MUSB_SUNXI) += sunxi.o
obj-$(CONFIG_USB_MUSB_TI) += ti-musb.o
+obj-$(CONFIG_USB_MUSB_UX500) += ux500.o
ccflags-y := $(call cc-option,-Wno-unused-variable) \
$(call cc-option,-Wno-unused-but-set-variable) \
diff --git a/drivers/usb/musb-new/musb_core.c b/drivers/usb/musb-new/musb_core.c
index 22811a5efb..18d9bc805f 100644
--- a/drivers/usb/musb-new/musb_core.c
+++ b/drivers/usb/musb-new/musb_core.c
@@ -1526,7 +1526,7 @@ static int __devinit musb_core_init(u16 musb_type, struct
musb *musb)
/*-*/
#if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_SOC_OMAP3430) || \
- defined(CONFIG_ARCH_OMAP4)
+ defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_ARCH_U8500)
static irqreturn_t generic_interrupt(int irq, void *__hci)
{
diff --git a/drivers/usb/musb-new/ux500.c b/drivers/usb/musb-new/ux500.c
new file mode 100644
index 00..57c7d5630d
--- /dev/null
+++ b/drivers/usb/musb-new/ux500.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2019 Stephan Gerhold */
+
+#include
+#include
+#include
+#include
+#include "musb_uboot.h"
+
+static struct musb_hdrc_config ux500_musb_hdrc_config = {
+ .multipoint = true,
+ .dyn_fifo = true,
+ .num_eps= 16,
+ .ram_bits = 16,
+};
+
+struct ux500_glue {
+ struct musb_host_data mdata;
+ struct device dev;
+ struct phy phy;
+ bool enabled;
+};
+#define to_ux500_glue(d) container_of(d, struct ux500_glue, dev)
+
+static int ux500_musb_enable(struct musb *musb)
+{
+ struct ux500_glue *glue = to_ux500_glue(musb->controller);
+ int ret;
+
+ if (glue->enabled)
+ return 0;
+
+ ret = generic_phy_power_on(>phy);
+ if (ret) {
+ printf("%s: failed to power on USB PHY\n", __func__);
+ return ret;
+ }
+
+ glue->enabled = true;
+ return 0;
+}
+
+static void ux500_musb_disable(struct musb *musb)
+{
+ struct ux500_glue *glue = to_ux500_glue(musb->controller);
+ int ret;
+
+ if (!glue->enabled)
+ return;
+
+ ret = generic_phy_power_off(>phy);
+ if (ret) {
+ printf("%s: failed to power off
