Ported dwc3-omap driver from linux kernel to uboot.
Signed-off-by: Kishon Vijay Abraham I kishon@ti.com --- drivers/usb/dwc3/Makefile | 2 + drivers/usb/dwc3/dwc3-omap.c | 447 ++++++++++++++++++++++++++++++++++++++++++ include/dwc3-omap-uboot.h | 32 +++ include/linux/usb/dwc3-omap.h | 19 ++ 4 files changed, 500 insertions(+) create mode 100644 drivers/usb/dwc3/dwc3-omap.c create mode 100644 include/dwc3-omap-uboot.h create mode 100644 include/linux/usb/dwc3-omap.h
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index fbfa0df..5533546 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -5,3 +5,5 @@ obj-$(CONFIG_USB_DWC3) += dwc3.o
dwc3-y := core.o dwc3-$(CONFIG_USB_DWC3_GADGET) += gadget.o ep0.o + +obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c new file mode 100644 index 0000000..ed92eec --- /dev/null +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -0,0 +1,447 @@ +/** + * dwc3-omap.c - OMAP Specific Glue layer + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi balbi@ti.com, + * Sebastian Andrzej Siewior bigeasy@linutronix.de + * + * Taken from Linux Kernel v3.16 (drivers/usb/dwc3/dwc3-omap.c) and ported + * to uboot. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <asm/io.h> +#include <common.h> +#include <errno.h> +#include <dwc3-omap-uboot.h> +#include <linux/usb/dwc3-omap.h> +#include <malloc.h> +#include <linux/compat.h> +#include "linux-compat.h" + +/* + * All these registers belong to OMAP's Wrapper around the + * DesignWare USB3 Core. + */ + +#define USBOTGSS_REVISION 0x0000 +#define USBOTGSS_SYSCONFIG 0x0010 +#define USBOTGSS_IRQ_EOI 0x0020 +#define USBOTGSS_EOI_OFFSET 0x0008 +#define USBOTGSS_IRQSTATUS_RAW_0 0x0024 +#define USBOTGSS_IRQSTATUS_0 0x0028 +#define USBOTGSS_IRQENABLE_SET_0 0x002c +#define USBOTGSS_IRQENABLE_CLR_0 0x0030 +#define USBOTGSS_IRQ0_OFFSET 0x0004 +#define USBOTGSS_IRQSTATUS_RAW_1 0x0030 +#define USBOTGSS_IRQSTATUS_1 0x0034 +#define USBOTGSS_IRQENABLE_SET_1 0x0038 +#define USBOTGSS_IRQENABLE_CLR_1 0x003c +#define USBOTGSS_IRQSTATUS_RAW_2 0x0040 +#define USBOTGSS_IRQSTATUS_2 0x0044 +#define USBOTGSS_IRQENABLE_SET_2 0x0048 +#define USBOTGSS_IRQENABLE_CLR_2 0x004c +#define USBOTGSS_IRQSTATUS_RAW_3 0x0050 +#define USBOTGSS_IRQSTATUS_3 0x0054 +#define USBOTGSS_IRQENABLE_SET_3 0x0058 +#define USBOTGSS_IRQENABLE_CLR_3 0x005c +#define USBOTGSS_IRQSTATUS_EOI_MISC 0x0030 +#define USBOTGSS_IRQSTATUS_RAW_MISC 0x0034 +#define USBOTGSS_IRQSTATUS_MISC 0x0038 +#define USBOTGSS_IRQENABLE_SET_MISC 0x003c +#define USBOTGSS_IRQENABLE_CLR_MISC 0x0040 +#define USBOTGSS_IRQMISC_OFFSET 0x03fc +#define USBOTGSS_UTMI_OTG_CTRL 0x0080 +#define USBOTGSS_UTMI_OTG_STATUS 0x0084 +#define USBOTGSS_UTMI_OTG_OFFSET 0x0480 +#define USBOTGSS_TXFIFO_DEPTH 0x0508 +#define USBOTGSS_RXFIFO_DEPTH 0x050c +#define USBOTGSS_MMRAM_OFFSET 0x0100 +#define USBOTGSS_FLADJ 0x0104 +#define USBOTGSS_DEBUG_CFG 0x0108 +#define USBOTGSS_DEBUG_DATA 0x010c +#define USBOTGSS_DEV_EBC_EN 0x0110 +#define USBOTGSS_DEBUG_OFFSET 0x0600 + +/* REVISION REGISTER */ +#define USBOTGSS_REVISION_XMAJOR(reg) ((reg >> 8) & 0x7) +#define USBOTGSS_REVISION_XMAJOR1 1 +#define USBOTGSS_REVISION_XMAJOR2 2 +/* SYSCONFIG REGISTER */ +#define USBOTGSS_SYSCONFIG_DMADISABLE (1 << 16) + +/* IRQ_EOI REGISTER */ +#define USBOTGSS_IRQ_EOI_LINE_NUMBER (1 << 0) + +/* IRQS0 BITS */ +#define USBOTGSS_IRQO_COREIRQ_ST (1 << 0) + +/* IRQMISC BITS */ +#define USBOTGSS_IRQMISC_DMADISABLECLR (1 << 17) +#define USBOTGSS_IRQMISC_OEVT (1 << 16) +#define USBOTGSS_IRQMISC_DRVVBUS_RISE (1 << 13) +#define USBOTGSS_IRQMISC_CHRGVBUS_RISE (1 << 12) +#define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE (1 << 11) +#define USBOTGSS_IRQMISC_IDPULLUP_RISE (1 << 8) +#define USBOTGSS_IRQMISC_DRVVBUS_FALL (1 << 5) +#define USBOTGSS_IRQMISC_CHRGVBUS_FALL (1 << 4) +#define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL (1 << 3) +#define USBOTGSS_IRQMISC_IDPULLUP_FALL (1 << 0) + +/* UTMI_OTG_CTRL REGISTER */ +#define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS (1 << 5) +#define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS (1 << 4) +#define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS (1 << 3) +#define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP (1 << 0) + +/* UTMI_OTG_STATUS REGISTER */ +#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE (1 << 31) +#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT (1 << 9) +#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8) +#define USBOTGSS_UTMI_OTG_STATUS_IDDIG (1 << 4) +#define USBOTGSS_UTMI_OTG_STATUS_SESSEND (1 << 3) +#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID (1 << 2) +#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID (1 << 1) + +static LIST_HEAD(dwc3_omap_list); + +struct dwc3_omap { + void *dev; + void *base; + + u32 utmi_otg_status; + u32 utmi_otg_offset; + u32 irqmisc_offset; + u32 irq_eoi_offset; + u32 debug_offset; + u32 irq0_offset; + u32 revision; + + u32 dma_status:1; + struct list_head list; + u32 index; +}; + +static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset) +{ + return readl(base + offset); +} + +static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value) +{ + writel(value, base + offset); +} + +static u32 dwc3_omap_read_utmi_status(struct dwc3_omap *omap) +{ + return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS + + omap->utmi_otg_offset); +} + +static void dwc3_omap_write_utmi_status(struct dwc3_omap *omap, u32 value) +{ + dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS + + omap->utmi_otg_offset, value); +} + +static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap) +{ + return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_0 - + omap->irq0_offset); +} + +static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value) +{ + dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0 - + omap->irq0_offset, value); +} + +static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap) +{ + return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_MISC + + omap->irqmisc_offset); +} + +static void dwc3_omap_write_irqmisc_status(struct dwc3_omap *omap, u32 value) +{ + dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_MISC + + omap->irqmisc_offset, value); +} + +static void dwc3_omap_write_irqmisc_set(struct dwc3_omap *omap, u32 value) +{ + dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_MISC + + omap->irqmisc_offset, value); +} + +static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value) +{ + dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0 - + omap->irq0_offset, value); +} + +static void dwc3_omap_set_mailbox(struct dwc3_omap *omap, + enum omap_dwc3_vbus_id_status status) +{ + u32 val; + + switch (status) { + case OMAP_DWC3_ID_GROUND: + dev_dbg(omap->dev, "ID GND\n"); + + val = dwc3_omap_read_utmi_status(omap); + val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG + | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID + | USBOTGSS_UTMI_OTG_STATUS_SESSEND); + val |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID + | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT; + dwc3_omap_write_utmi_status(omap, val); + break; + + case OMAP_DWC3_VBUS_VALID: + dev_dbg(omap->dev, "VBUS Connect\n"); + + val = dwc3_omap_read_utmi_status(omap); + val &= ~USBOTGSS_UTMI_OTG_STATUS_SESSEND; + val |= USBOTGSS_UTMI_OTG_STATUS_IDDIG + | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID + | USBOTGSS_UTMI_OTG_STATUS_SESSVALID + | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT; + dwc3_omap_write_utmi_status(omap, val); + break; + + case OMAP_DWC3_ID_FLOAT: + case OMAP_DWC3_VBUS_OFF: + dev_dbg(omap->dev, "VBUS Disconnect\n"); + + val = dwc3_omap_read_utmi_status(omap); + val &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSVALID + | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID + | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT); + val |= USBOTGSS_UTMI_OTG_STATUS_SESSEND + | USBOTGSS_UTMI_OTG_STATUS_IDDIG; + dwc3_omap_write_utmi_status(omap, val); + break; + + default: + dev_dbg(omap->dev, "invalid state\n"); + } +} + +static int dwc3_omap_interrupt(int irq, void *_omap) +{ + struct dwc3_omap *omap = _omap; + u32 reg; + + reg = dwc3_omap_read_irqmisc_status(omap); + + if (reg & USBOTGSS_IRQMISC_DMADISABLECLR) { + dev_dbg(omap->dev, "DMA Disable was Cleared\n"); + omap->dma_status = false; + } + + if (reg & USBOTGSS_IRQMISC_OEVT) + dev_dbg(omap->dev, "OTG Event\n"); + + if (reg & USBOTGSS_IRQMISC_DRVVBUS_RISE) + dev_dbg(omap->dev, "DRVVBUS Rise\n"); + + if (reg & USBOTGSS_IRQMISC_CHRGVBUS_RISE) + dev_dbg(omap->dev, "CHRGVBUS Rise\n"); + + if (reg & USBOTGSS_IRQMISC_DISCHRGVBUS_RISE) + dev_dbg(omap->dev, "DISCHRGVBUS Rise\n"); + + if (reg & USBOTGSS_IRQMISC_IDPULLUP_RISE) + dev_dbg(omap->dev, "IDPULLUP Rise\n"); + + if (reg & USBOTGSS_IRQMISC_DRVVBUS_FALL) + dev_dbg(omap->dev, "DRVVBUS Fall\n"); + + if (reg & USBOTGSS_IRQMISC_CHRGVBUS_FALL) + dev_dbg(omap->dev, "CHRGVBUS Fall\n"); + + if (reg & USBOTGSS_IRQMISC_DISCHRGVBUS_FALL) + dev_dbg(omap->dev, "DISCHRGVBUS Fall\n"); + + if (reg & USBOTGSS_IRQMISC_IDPULLUP_FALL) + dev_dbg(omap->dev, "IDPULLUP Fall\n"); + + dwc3_omap_write_irqmisc_status(omap, reg); + + reg = dwc3_omap_read_irq0_status(omap); + + dwc3_omap_write_irq0_status(omap, reg); + + return !!reg; +} + +static void dwc3_omap_enable_irqs(struct dwc3_omap *omap) +{ + u32 reg; + + /* enable all IRQs */ + reg = USBOTGSS_IRQO_COREIRQ_ST; + dwc3_omap_write_irq0_set(omap, reg); + + reg = (USBOTGSS_IRQMISC_OEVT | + USBOTGSS_IRQMISC_DRVVBUS_RISE | + USBOTGSS_IRQMISC_CHRGVBUS_RISE | + USBOTGSS_IRQMISC_DISCHRGVBUS_RISE | + USBOTGSS_IRQMISC_IDPULLUP_RISE | + USBOTGSS_IRQMISC_DRVVBUS_FALL | + USBOTGSS_IRQMISC_CHRGVBUS_FALL | + USBOTGSS_IRQMISC_DISCHRGVBUS_FALL | + USBOTGSS_IRQMISC_IDPULLUP_FALL); + + dwc3_omap_write_irqmisc_set(omap, reg); +} + +static void dwc3_omap_disable_irqs(struct dwc3_omap *omap) +{ + /* disable all IRQs */ + dwc3_omap_write_irqmisc_set(omap, 0x00); + dwc3_omap_write_irq0_set(omap, 0x00); +} + +/** + * dwc3_omap_uboot_init - dwc3 omap uboot initialization code + * @dev: struct dwc3_omap_device containing initialization data + * + * Entry point for dwc3 omap driver (equivalent to dwc3_omap_probe in linux + * kernel driver). Pointer to dwc3_omap_device should be passed containing + * base address and other initialization data. Returns '0' on success and + * a negative value on failure. + * + * Generally called from board_usb_init() implemented in board file. + */ +int dwc3_omap_uboot_init(struct dwc3_omap_device *dev) +{ + struct dwc3_omap *omap; + + int utmi_mode; + int x_major; + + u32 reg; + + omap = devm_kzalloc(NULL, sizeof(*omap), GFP_KERNEL); + if (!omap) { + dev_err(NULL, "not enough memory\n"); + return -ENOMEM; + } + + omap->base = dev->base; + omap->index = dev->index; + + reg = dwc3_omap_readl(omap->base, USBOTGSS_REVISION); + omap->revision = reg; + x_major = USBOTGSS_REVISION_XMAJOR(reg); + + /* Differentiate between OMAP5 and AM437x */ + switch (x_major) { + case USBOTGSS_REVISION_XMAJOR1: + case USBOTGSS_REVISION_XMAJOR2: + omap->irq_eoi_offset = 0; + omap->irq0_offset = 0; + omap->irqmisc_offset = 0; + omap->utmi_otg_offset = 0; + omap->debug_offset = 0; + break; + default: + /* Default to the latest revision */ + omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET; + omap->irq0_offset = USBOTGSS_IRQ0_OFFSET; + omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET; + omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET; + omap->debug_offset = USBOTGSS_DEBUG_OFFSET; + break; + } + + /* For OMAP5(ES2.0) and AM437x x_major is 2 even though there are + * changes in wrapper registers, Using dt compatible for aegis + */ + +#ifdef CONFIG_AM43XX + omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET; + omap->irq0_offset = USBOTGSS_IRQ0_OFFSET; + omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET; + omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET; + omap->debug_offset = USBOTGSS_DEBUG_OFFSET; +#endif + + reg = dwc3_omap_read_utmi_status(omap); + + utmi_mode = dev->utmi_mode; + + switch (utmi_mode) { + case DWC3_OMAP_UTMI_MODE_SW: + reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE; + break; + case DWC3_OMAP_UTMI_MODE_HW: + reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE; + break; + default: + dev_dbg(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode); + } + + dwc3_omap_write_utmi_status(omap, reg); + + /* check the DMA Status */ + reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG); + omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE); + + dwc3_omap_enable_irqs(omap); + + dwc3_omap_set_mailbox(omap, dev->vbus_id_status); + list_add_tail(&omap->list, &dwc3_omap_list); + + return 0; +} + +/** + * dwc3_omap_uboot_exit - dwc3 omap uboot cleanup code + * @index: index of this controller + * + * Performs cleanup of memory allocated in dwc3_omap_uboot_init + * (equivalent to dwc3_omap_remove in linux). index of _this_ controller + * should be passed and should match with the index passed in + * dwc3_omap_device during init. + * + * Generally called from board file. + */ +void dwc3_omap_uboot_exit(int index) +{ + struct dwc3_omap *omap = NULL; + + list_for_each_entry(omap, &dwc3_omap_list, list) { + if (omap->index != index) + continue; + + dwc3_omap_disable_irqs(omap); + list_del(&omap->list); + kfree(omap); + break; + } +} + +/** + * dwc3_omap_uboot_interrupt_status - check the status of interrupt + * @index: index of this controller + * + * Checks the status of interrupts and returns true if an interrupt + * is detected or false otherwise. + * + * Generally called from board file. + */ +int dwc3_omap_uboot_interrupt_status(int index) +{ + struct dwc3_omap *omap = NULL; + + list_for_each_entry(omap, &dwc3_omap_list, list) + if (omap->index == index) + return dwc3_omap_interrupt(-1, omap); + + return 0; +} diff --git a/include/dwc3-omap-uboot.h b/include/dwc3-omap-uboot.h new file mode 100644 index 0000000..92038fb --- /dev/null +++ b/include/dwc3-omap-uboot.h @@ -0,0 +1,32 @@ +/* include/dwc3_omap_uboot.h + * + * Copyright (c) 2014 Texas Instruments Incorporated - http://www.ti.com + * + * Designware SuperSpeed OMAP Glue uboot init + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __DWC3_OMAP_UBOOT_H_ +#define __DWC3_OMAP_UBOOT_H_ + +#include <linux/usb/dwc3-omap.h> + +enum omap_dwc3_vbus_id_status { + OMAP_DWC3_ID_FLOAT, + OMAP_DWC3_ID_GROUND, + OMAP_DWC3_VBUS_OFF, + OMAP_DWC3_VBUS_VALID, +}; + +struct dwc3_omap_device { + void *base; + int index; + enum dwc3_omap_utmi_mode utmi_mode; + enum omap_dwc3_vbus_id_status vbus_id_status; +}; + +int dwc3_omap_uboot_init(struct dwc3_omap_device *dev); +void dwc3_omap_uboot_exit(int index); +int dwc3_omap_uboot_interrupt_status(int index); +#endif /* __DWC3_OMAP_UBOOT_H_ */ diff --git a/include/linux/usb/dwc3-omap.h b/include/linux/usb/dwc3-omap.h new file mode 100644 index 0000000..8bf7b55 --- /dev/null +++ b/include/linux/usb/dwc3-omap.h @@ -0,0 +1,19 @@ +/* include/linux/usb/dwc3-omap.h + * + * Copyright (c) 2014 Texas Instruments Incorporated - http://www.ti.com + * + * Designware SuperSpeed Glue + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __DWC3_OMAP_H_ +#define __DWC3_OMAP_H_ + +enum dwc3_omap_utmi_mode { + DWC3_OMAP_UTMI_MODE_UNKNOWN = 0, + DWC3_OMAP_UTMI_MODE_HW, + DWC3_OMAP_UTMI_MODE_SW, +}; + +#endif /* __DWC3_OMAP_H_ */