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-rw-r--r--target/linux/gemini/patches-4.19/0016-usb-host-fotg2-add-Gemini-specific-handling.patch138
1 files changed, 138 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-4.19/0016-usb-host-fotg2-add-Gemini-specific-handling.patch b/target/linux/gemini/patches-4.19/0016-usb-host-fotg2-add-Gemini-specific-handling.patch
new file mode 100644
index 0000000000..55d44b0e10
--- /dev/null
+++ b/target/linux/gemini/patches-4.19/0016-usb-host-fotg2-add-Gemini-specific-handling.patch
@@ -0,0 +1,138 @@
+From b331ae758123ba20ba41199e007ac33fc0f242e3 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Fri, 21 Apr 2017 22:19:00 +0200
+Subject: [PATCH 16/18] usb: host: fotg2: add Gemini-specific handling
+
+The Cortina Systems Gemini has bolted on a PHY inside the
+silicon that can be handled by six bits in a MISC register in
+the system controller.
+
+If we are running on Gemini, look up a syscon regmap through
+a phandle and enable VBUS and optionally the Mini-B connector.
+
+If the device is flagged as "wakeup-source" using the standard
+DT bindings, we also enable this in the global controller for
+respective port.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/usb/host/Kconfig | 1 +
+ drivers/usb/host/fotg210-hcd.c | 76 ++++++++++++++++++++++++++++++++++
+ 2 files changed, 77 insertions(+)
+
+diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
+index 1a4ea98cac2a..308d514c9a2a 100644
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -372,6 +372,7 @@ config USB_ISP1362_HCD
+ config USB_FOTG210_HCD
+ tristate "FOTG210 HCD support"
+ depends on USB && HAS_DMA && HAS_IOMEM
++ select MFD_SYSCON
+ ---help---
+ Faraday FOTG210 is an OTG controller which can be configured as
+ an USB2.0 host. It is designed to meet USB2.0 EHCI specification
+diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
+index 6e4b40cd5916..5abb07f4136f 100644
+--- a/drivers/usb/host/fotg210-hcd.c
++++ b/drivers/usb/host/fotg210-hcd.c
+@@ -33,6 +33,10 @@
+ #include <linux/platform_device.h>
+ #include <linux/io.h>
+ #include <linux/clk.h>
++#include <linux/bitops.h>
++/* For Cortina Gemini */
++#include <linux/mfd/syscon.h>
++#include <linux/regmap.h>
+
+ #include <asm/byteorder.h>
+ #include <asm/irq.h>
+@@ -5554,6 +5558,72 @@ static void fotg210_init(struct fotg210_hcd *fotg210)
+ iowrite32(value, &fotg210->regs->otgcsr);
+ }
+
++/*
++ * Gemini-specific initialization function, only executed on the
++ * Gemini SoC using the global misc control register.
++ */
++#define GEMINI_GLOBAL_MISC_CTRL 0x30
++#define GEMINI_MISC_USB0_WAKEUP BIT(14)
++#define GEMINI_MISC_USB1_WAKEUP BIT(15)
++#define GEMINI_MISC_USB0_VBUS_ON BIT(22)
++#define GEMINI_MISC_USB1_VBUS_ON BIT(23)
++#define GEMINI_MISC_USB0_MINI_B BIT(29)
++#define GEMINI_MISC_USB1_MINI_B BIT(30)
++
++static int fotg210_gemini_init(struct device *dev, struct usb_hcd *hcd)
++{
++ struct device_node *np = dev->of_node;
++ struct regmap *map;
++ bool mini_b;
++ bool wakeup;
++ u32 mask, val;
++ int ret;
++
++ map = syscon_regmap_lookup_by_phandle(np, "syscon");
++ if (IS_ERR(map)) {
++ dev_err(dev, "no syscon\n");
++ return PTR_ERR(map);
++ }
++ mini_b = of_property_read_bool(np, "cortina,gemini-mini-b");
++ wakeup = of_property_read_bool(np, "wakeup-source");
++
++ /*
++ * Figure out if this is USB0 or USB1 by simply checking the
++ * physical base address.
++ */
++ mask = 0;
++ if (hcd->rsrc_start == 0x69000000) {
++ val = GEMINI_MISC_USB1_VBUS_ON;
++ if (mini_b)
++ val |= GEMINI_MISC_USB1_MINI_B;
++ else
++ mask |= GEMINI_MISC_USB1_MINI_B;
++ if (wakeup)
++ val |= GEMINI_MISC_USB1_WAKEUP;
++ else
++ mask |= GEMINI_MISC_USB1_WAKEUP;
++ } else {
++ val = GEMINI_MISC_USB0_VBUS_ON;
++ if (mini_b)
++ val |= GEMINI_MISC_USB0_MINI_B;
++ else
++ mask |= GEMINI_MISC_USB0_MINI_B;
++ if (wakeup)
++ val |= GEMINI_MISC_USB0_WAKEUP;
++ else
++ mask |= GEMINI_MISC_USB0_WAKEUP;
++ }
++
++ ret = regmap_update_bits(map, GEMINI_GLOBAL_MISC_CTRL, mask, val);
++ if (ret) {
++ dev_err(dev, "failed to initialize Gemini PHY\n");
++ return ret;
++ }
++
++ dev_info(dev, "initialized Gemini PHY\n");
++ return 0;
++}
++
+ /**
+ * fotg210_hcd_probe - initialize faraday FOTG210 HCDs
+ *
+@@ -5631,6 +5701,12 @@ static int fotg210_hcd_probe(struct platform_device *pdev)
+
+ fotg210_init(fotg210);
+
++ if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) {
++ retval = fotg210_gemini_init(dev, hcd);
++ if (retval)
++ goto failed_dis_clk;
++ }
++
+ retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (retval) {
+ dev_err(dev, "failed to add hcd with err %d\n", retval);
+--
+2.19.2
+