diff options
Diffstat (limited to 'target/linux/gemini/patches-4.19/0016-usb-host-fotg2-add-Gemini-specific-handling.patch')
| -rw-r--r-- | target/linux/gemini/patches-4.19/0016-usb-host-fotg2-add-Gemini-specific-handling.patch | 138 |
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 + |