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authorSvetoslav Neykov <svetoslav@neykov.name>2016-12-30 17:06:43 +0200
committerJohn Crispin <john@phrozen.org>2017-01-20 00:37:01 +0100
commit97b52593bcf928520aa5a294e3eb16042766d2e0 (patch)
treec6acb2571b968099cb7658b8613071e167accdfb /target/linux/ar71xx
parentcf79e393f9550dd00e1926168f47d026e3cf72ee (diff)
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ar71xx: Chipidea USB device support
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>
Diffstat (limited to 'target/linux/ar71xx')
-rw-r--r--target/linux/ar71xx/Makefile2
-rw-r--r--target/linux/ar71xx/patches-4.4/920-usb-chipidea-AR933x-platform-support.patch99
-rw-r--r--target/linux/ar71xx/patches-4.4/930-chipidea-pullup.patch80
3 files changed, 180 insertions, 1 deletions
diff --git a/target/linux/ar71xx/Makefile b/target/linux/ar71xx/Makefile
index a8df2b036e..ecc6d37051 100644
--- a/target/linux/ar71xx/Makefile
+++ b/target/linux/ar71xx/Makefile
@@ -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
diff --git a/target/linux/ar71xx/patches-4.4/920-usb-chipidea-AR933x-platform-support.patch b/target/linux/ar71xx/patches-4.4/920-usb-chipidea-AR933x-platform-support.patch
new file mode 100644
index 0000000000..41eb7f2895
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.4/920-usb-chipidea-AR933x-platform-support.patch
@@ -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)
diff --git a/target/linux/ar71xx/patches-4.4/930-chipidea-pullup.patch b/target/linux/ar71xx/patches-4.4/930-chipidea-pullup.patch
new file mode 100644
index 0000000000..12568234bc
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.4/930-chipidea-pullup.patch
@@ -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