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ar71xx: Chipidea USB device support

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Changes the platform to use the Chipidea driver instead of the
generic USB host driver which has support for both host and
device modes (selected on boot).

The changes in 930-chipidea-pullup.patch are already in mainline.
I'll upstream 920-usb-chipidea-AR933x-platform-support.patch once I
can test the changes with a newer kernel.

Signed-off-by: Svetoslav Neykov <svetoslav@neykov.name>
This commit is contained in:
Svetoslav Neykov 2016-12-30 17:06:43 +02:00 committed by John Crispin
parent cf79e393f9
commit 97b52593bc
4 changed files with 203 additions and 1 deletions
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23
package/kernel/linux/modules/usb.mk
View file

@ -1375,6 +1375,29 @@ endef
$(eval $(call KernelPackage,usbip-server))
define KernelPackage/usb-chipidea
TITLE:=Host and device support for Chipidea controllers
DEPENDS:=+USB_GADGET_SUPPORT:kmod-usb-gadget
KCONFIG:= \
CONFIG_NOP_USB_XCEIV=y \
CONFIG_EXTCON \
CONFIG_USB_CHIPIDEA \
CONFIG_USB_CHIPIDEA_HOST=y \
CONFIG_USB_CHIPIDEA_UDC=y \
CONFIG_USB_CHIPIDEA_DEBUG=y
FILES:= \
$(LINUX_DIR)/drivers/extcon/extcon.ko \
$(LINUX_DIR)/drivers/usb/chipidea/ci_hdrc.ko
AUTOLOAD:=$(call AutoLoad,51,ci_hdrc,0)
$(call AddDepends/usb)
endef
define KernelPackage/usb-chipidea/description
Kernel support for USB Chipidea controllers
endef
$(eval $(call KernelPackage,usb-chipidea))
define KernelPackage/usbmon
TITLE:=USB traffic monitor
KCONFIG:=CONFIG_USB_MON

2
target/linux/ar71xx/Makefile
View file

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
ARCH:=mips
BOARD:=ar71xx
BOARDNAME:=Atheros AR7xxx/AR9xxx
FEATURES:=mips16
FEATURES:=mips16 usbgadget
CPU_TYPE:=24kc
SUBTARGETS:=generic nand mikrotik

99
target/linux/ar71xx/patches-4.4/920-usb-chipidea-AR933x-platform-support.patch Normal file
View file

@ -0,0 +1,99 @@
Index: linux-4.4.4/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
===================================================================
--- linux-4.4.4.orig/arch/mips/include/asm/mach-ath79/ar71xx_regs.h 2016-03-31 21:43:10.595132564 +0300
+++ linux-4.4.4/arch/mips/include/asm/mach-ath79/ar71xx_regs.h 2016-03-31 21:56:21.463152017 +0300
@@ -641,6 +641,7 @@
#define AR933X_BOOTSTRAP_MDIO_GPIO_EN BIT(18)
#define AR933X_BOOTSTRAP_EEPBUSY BIT(4)
+#define AR933X_BOOTSTRAP_USB_MODE_HOST BIT(3)
#define AR933X_BOOTSTRAP_REF_CLK_40 BIT(0)
#define AR934X_BOOTSTRAP_SW_OPTION8 BIT(23)
@@ -670,6 +671,8 @@
#define QCA956X_BOOTSTRAP_REF_CLK_40 BIT(2)
+#define AR933X_USB_CONFIG_HOST_ONLY BIT(8)
+
#define AR934X_PCIE_WMAC_INT_WMAC_MISC BIT(0)
#define AR934X_PCIE_WMAC_INT_WMAC_TX BIT(1)
#define AR934X_PCIE_WMAC_INT_WMAC_RXLP BIT(2)
Index: linux-4.4.4/arch/mips/ath79/dev-usb.c
===================================================================
--- linux-4.4.4.orig/arch/mips/ath79/dev-usb.c 2016-03-31 21:43:10.407132560 +0300
+++ linux-4.4.4/arch/mips/ath79/dev-usb.c 2016-03-31 21:43:10.707132567 +0300
@@ -19,6 +19,9 @@
#include <linux/platform_device.h>
#include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+#include <linux/usb/usb_phy_generic.h>
#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/ar71xx_regs.h>
@@ -170,6 +173,54 @@
&ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
}
+static void __init ar933x_usb_setup_ctrl_config(void)
+{
+ void __iomem *usb_ctrl_base, *usb_config_reg;
+ u32 usb_config;
+
+ usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
+ usb_config_reg = usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG;
+ usb_config = __raw_readl(usb_config_reg);
+ usb_config &= ~AR933X_USB_CONFIG_HOST_ONLY;
+ __raw_writel(usb_config, usb_config_reg);
+ iounmap(usb_ctrl_base);
+}
+
+static void __init ar933x_ci_usb_setup(void)
+{
+ u32 bootstrap;
+ enum usb_dr_mode dr_mode;
+ struct ci_hdrc_platform_data ci_pdata;
+ struct platform_device *phy;
+
+ bootstrap = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
+ if (bootstrap & AR933X_BOOTSTRAP_USB_MODE_HOST) {
+ dr_mode = USB_DR_MODE_HOST;
+ } else {
+ dr_mode = USB_DR_MODE_PERIPHERAL;
+ ar933x_usb_setup_ctrl_config();
+ }
+
+ memset(&ci_pdata, 0, sizeof(ci_pdata));
+ ci_pdata.name = "ci_hdrc_ar933x";
+ ci_pdata.capoffset = DEF_CAPOFFSET;
+ ci_pdata.dr_mode = dr_mode;
+ ci_pdata.flags = CI_HDRC_DUAL_ROLE_NOT_OTG | CI_HDRC_DP_ALWAYS_PULLUP;
+ ci_pdata.vbus_extcon.edev = ERR_PTR(-ENODEV);
+ ci_pdata.id_extcon.edev = ERR_PTR(-ENODEV);
+ ci_pdata.itc_setting = 1;
+
+ /* register a nop PHY */
+ phy = usb_phy_generic_register();
+ if (IS_ERR(phy))
+ return;
+
+ ath79_usb_register("ci_hdrc", -1,
+ AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
+ ATH79_CPU_IRQ(3),
+ &ci_pdata, sizeof(ci_pdata));
+}
+
static void __init ar933x_usb_setup(void)
{
ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
@@ -185,6 +236,8 @@
AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
ATH79_CPU_IRQ(3),
&ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
+
+ ar933x_ci_usb_setup();
}
static void enable_tx_tx_idp_violation_fix(unsigned base)

80
target/linux/ar71xx/patches-4.4/930-chipidea-pullup.patch Normal file
View file

@ -0,0 +1,80 @@
Index: linux-4.4.4/drivers/usb/chipidea/ci.h
===================================================================
--- linux-4.4.4.orig/drivers/usb/chipidea/ci.h 2016-03-31 21:39:23.571126980 +0300
+++ linux-4.4.4/drivers/usb/chipidea/ci.h 2016-03-31 21:39:23.567126980 +0300
@@ -199,6 +199,7 @@
* @in_lpm: if the core in low power mode
* @wakeup_int: if wakeup interrupt occur
* @rev: The revision number for controller
+ * @dp_always_pullup: keep dp always pullup at device mode
*/
struct ci_hdrc {
struct device *dev;
@@ -248,6 +249,7 @@
bool in_lpm;
bool wakeup_int;
enum ci_revision rev;
+ bool dp_always_pullup;
};
static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci)
Index: linux-4.4.4/drivers/usb/chipidea/core.c
===================================================================
--- linux-4.4.4.orig/drivers/usb/chipidea/core.c 2016-03-31 21:39:23.571126980 +0300
+++ linux-4.4.4/drivers/usb/chipidea/core.c 2016-03-31 21:41:33.159130168 +0300
@@ -883,7 +883,7 @@
{
ci_hdrc_gadget_destroy(ci);
ci_hdrc_host_destroy(ci);
- if (ci->is_otg)
+ if (!ci->dp_always_pullup && ci->roles[CI_ROLE_GADGET])
ci_hdrc_otg_destroy(ci);
}
@@ -933,6 +933,9 @@
ci->supports_runtime_pm = !!(ci->platdata->flags &
CI_HDRC_SUPPORTS_RUNTIME_PM);
+ ci->dp_always_pullup = !!(ci->platdata->flags &
+ CI_HDRC_DP_ALWAYS_PULLUP);
+
ret = hw_device_init(ci, base);
if (ret < 0) {
dev_err(dev, "can't initialize hardware\n");
@@ -998,7 +1001,7 @@
goto deinit_phy;
}
- if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) {
+ if (!ci->dp_always_pullup && ci->roles[CI_ROLE_GADGET]) {
ret = ci_hdrc_otg_init(ci);
if (ret) {
dev_err(dev, "init otg fails, ret = %d\n", ret);
Index: linux-4.4.4/drivers/usb/chipidea/otg.c
===================================================================
--- linux-4.4.4.orig/drivers/usb/chipidea/otg.c 2016-03-31 21:39:23.571126980 +0300
+++ linux-4.4.4/drivers/usb/chipidea/otg.c 2016-03-31 21:39:23.567126980 +0300
@@ -95,8 +95,10 @@
void ci_handle_vbus_change(struct ci_hdrc *ci)
{
- if (!ci->is_otg)
+ if (ci->dp_always_pullup) {
+ usb_gadget_vbus_connect(&ci->gadget);
return;
+ }
if (hw_read_otgsc(ci, OTGSC_BSV))
usb_gadget_vbus_connect(&ci->gadget);
Index: linux-4.4.4/include/linux/usb/chipidea.h
===================================================================
--- linux-4.4.4.orig/include/linux/usb/chipidea.h 2016-03-31 21:39:23.571126980 +0300
+++ linux-4.4.4/include/linux/usb/chipidea.h 2016-03-31 21:39:23.567126980 +0300
@@ -55,6 +55,7 @@
#define CI_HDRC_OVERRIDE_AHB_BURST BIT(9)
#define CI_HDRC_OVERRIDE_TX_BURST BIT(10)
#define CI_HDRC_OVERRIDE_RX_BURST BIT(11)
+#define CI_HDRC_DP_ALWAYS_PULLUP BIT(12)
enum usb_dr_mode dr_mode;
#define CI_HDRC_CONTROLLER_RESET_EVENT 0
#define CI_HDRC_CONTROLLER_STOPPED_EVENT 1