This is based on Jussi Kivilinna's work for the linux-sunxi-3.4 kernel to use the kernels musb driver instead of Allwinners own custom driver.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/usb/musb-new/Makefile | 1 + drivers/usb/musb-new/sunxi.c | 279 ++++++++++++++++++++++++++++++++++++++++++ include/usb.h | 4 +- 3 files changed, 282 insertions(+), 2 deletions(-) create mode 100644 drivers/usb/musb-new/sunxi.c
diff --git a/drivers/usb/musb-new/Makefile b/drivers/usb/musb-new/Makefile index 3facf0f..9edeece 100644 --- a/drivers/usb/musb-new/Makefile +++ b/drivers/usb/musb-new/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_MUSB_HOST) += musb_host.o musb_core.o musb_uboot.o obj-$(CONFIG_USB_MUSB_DSPS) += musb_dsps.o obj-$(CONFIG_USB_MUSB_AM35X) += am35x.o obj-$(CONFIG_USB_MUSB_OMAP2PLUS) += omap2430.o +obj-$(CONFIG_USB_MUSB_SUNXI) += sunxi.o
ccflags-y := $(call cc-option,-Wno-unused-variable) \ $(call cc-option,-Wno-unused-but-set-variable) \ diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c new file mode 100644 index 0000000..778916d --- /dev/null +++ b/drivers/usb/musb-new/sunxi.c @@ -0,0 +1,279 @@ +/* + * Allwinner SUNXI "glue layer" + * + * Copyright © 2015 Hans de Goede hdegoede@redhat.com + * Copyright © 2013 Jussi Kivilinna jussi.kivilinna@iki.fi + * + * Based on the sw_usb "Allwinner OTG Dual Role Controller" code. + * Copyright 2007-2012 (C) Allwinner Technology Co., Ltd. + * javen javen@allwinnertech.com + * + * Based on the DA8xx "glue layer" code. + * Copyright (c) 2008-2009 MontaVista Software, Inc. source@mvista.com + * Copyright (C) 2005-2006 by Texas Instruments + * + * This file is part of the Inventra Controller Driver for Linux. + * + * The Inventra Controller Driver for Linux is free software; you + * can redistribute it and/or modify it under the terms of the GNU + * General Public License version 2 as published by the Free Software + * Foundation. + * + */ +#include <common.h> +#include <asm/arch/cpu.h> +#include <asm/arch/usbc.h> +#include "linux-compat.h" +#include "musb_core.h" + +/****************************************************************************** + ****************************************************************************** + * From the Allwinner driver + ****************************************************************************** + ******************************************************************************/ + +/****************************************************************************** + * From include/sunxi_usb_bsp.h + ******************************************************************************/ + +/* reg offsets */ +#define USBC_REG_o_ISCR 0x0400 +#define USBC_REG_o_PHYCTL 0x0404 +#define USBC_REG_o_PHYBIST 0x0408 +#define USBC_REG_o_PHYTUNE 0x040c + +#define USBC_REG_o_VEND0 0x0043 + +/* Interface Status and Control */ +#define USBC_BP_ISCR_VBUS_VALID_FROM_DATA 30 +#define USBC_BP_ISCR_VBUS_VALID_FROM_VBUS 29 +#define USBC_BP_ISCR_EXT_ID_STATUS 28 +#define USBC_BP_ISCR_EXT_DM_STATUS 27 +#define USBC_BP_ISCR_EXT_DP_STATUS 26 +#define USBC_BP_ISCR_MERGED_VBUS_STATUS 25 +#define USBC_BP_ISCR_MERGED_ID_STATUS 24 + +#define USBC_BP_ISCR_ID_PULLUP_EN 17 +#define USBC_BP_ISCR_DPDM_PULLUP_EN 16 +#define USBC_BP_ISCR_FORCE_ID 14 +#define USBC_BP_ISCR_FORCE_VBUS_VALID 12 +#define USBC_BP_ISCR_VBUS_VALID_SRC 10 + +#define USBC_BP_ISCR_HOSC_EN 7 +#define USBC_BP_ISCR_VBUS_CHANGE_DETECT 6 +#define USBC_BP_ISCR_ID_CHANGE_DETECT 5 +#define USBC_BP_ISCR_DPDM_CHANGE_DETECT 4 +#define USBC_BP_ISCR_IRQ_ENABLE 3 +#define USBC_BP_ISCR_VBUS_CHANGE_DETECT_EN 2 +#define USBC_BP_ISCR_ID_CHANGE_DETECT_EN 1 +#define USBC_BP_ISCR_DPDM_CHANGE_DETECT_EN 0 + +/****************************************************************************** + * From usbc/usbc.c + ******************************************************************************/ + +static u32 USBC_WakeUp_ClearChangeDetect(u32 reg_val) +{ + u32 temp = reg_val; + + temp &= ~(1 << USBC_BP_ISCR_VBUS_CHANGE_DETECT); + temp &= ~(1 << USBC_BP_ISCR_ID_CHANGE_DETECT); + temp &= ~(1 << USBC_BP_ISCR_DPDM_CHANGE_DETECT); + + return temp; +} + +static void USBC_EnableIdPullUp(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val |= (1 << USBC_BP_ISCR_ID_PULLUP_EN); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_DisableIdPullUp(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val &= ~(1 << USBC_BP_ISCR_ID_PULLUP_EN); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_EnableDpDmPullUp(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val |= (1 << USBC_BP_ISCR_DPDM_PULLUP_EN); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_DisableDpDmPullUp(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val &= ~(1 << USBC_BP_ISCR_DPDM_PULLUP_EN); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_ForceIdToLow(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_ID); + reg_val |= (0x02 << USBC_BP_ISCR_FORCE_ID); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_ForceIdToHigh(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_ID); + reg_val |= (0x03 << USBC_BP_ISCR_FORCE_ID); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_ForceVbusValidDisable(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_ForceVbusValidToHigh(__iomem void *base) +{ + u32 reg_val; + + reg_val = musb_readl(base, USBC_REG_o_ISCR); + reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID); + reg_val |= (0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID); + reg_val = USBC_WakeUp_ClearChangeDetect(reg_val); + musb_writel(base, USBC_REG_o_ISCR, reg_val); +} + +static void USBC_ConfigFIFO_Base(void) +{ + u32 reg_value; + + /* config usb fifo, 8kb mode */ + reg_value = readl(SUNXI_SRAMC_BASE + 0x04); + reg_value &= ~(0x03 << 0); + reg_value |= (1 << 0); + writel(reg_value, SUNXI_SRAMC_BASE + 0x04); +} + +/****************************************************************************** + * MUSB Glue code + ******************************************************************************/ + +static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci) +{ + struct musb *musb = __hci; + irqreturn_t retval = IRQ_NONE; + + /* read and flush interrupts */ + musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); + if (musb->int_usb) + musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb); + musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); + if (musb->int_tx) + musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx); + musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); + if (musb->int_rx) + musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx); + + if (musb->int_usb || musb->int_tx || musb->int_rx) + retval |= musb_interrupt(musb); + + return retval; +} + +static void sunxi_musb_enable(struct musb *musb) +{ + pr_debug("%s():\n", __func__); + + /* select PIO mode */ + musb_writeb(musb->mregs, USBC_REG_o_VEND0, 0); + + if (is_host_enabled(musb)) { + /* port power on */ + sunxi_usbc_vbus_enable(0); + } +} + +static void sunxi_musb_disable(struct musb *musb) +{ + pr_debug("%s():\n", __func__); + + /* Put the controller back in a pristane state for "usb reset" */ + if (musb->is_active) { + sunxi_usbc_disable(0); + sunxi_usbc_enable(0); + musb->is_active = 0; + } +} + +static int sunxi_musb_init(struct musb *musb) +{ + int err; + + pr_debug("%s():\n", __func__); + + err = sunxi_usbc_request_resources(0); + if (err) + return err; + + musb->isr = sunxi_musb_interrupt; + sunxi_usbc_enable(0); + + USBC_ConfigFIFO_Base(); + USBC_EnableDpDmPullUp(musb->mregs); + USBC_EnableIdPullUp(musb->mregs); + + if (is_host_enabled(musb)) { + /* Host mode */ + USBC_ForceIdToLow(musb->mregs); + USBC_ForceVbusValidToHigh(musb->mregs); + } else { + /* Peripheral mode */ + USBC_ForceIdToHigh(musb->mregs); + USBC_ForceVbusValidDisable(musb->mregs); + } + + return 0; +} + +static int sunxi_musb_exit(struct musb *musb) +{ + pr_debug("%s():\n", __func__); + + USBC_DisableDpDmPullUp(musb->mregs); + USBC_DisableIdPullUp(musb->mregs); + sunxi_usbc_vbus_disable(0); + sunxi_usbc_disable(0); + + return sunxi_usbc_free_resources(0); +} + +const struct musb_platform_ops sunxi_musb_ops = { + .init = sunxi_musb_init, + .exit = sunxi_musb_exit, + + .enable = sunxi_musb_enable, + .disable = sunxi_musb_disable, +}; diff --git a/include/usb.h b/include/usb.h index 3d33b2d..b921a7f 100644 --- a/include/usb.h +++ b/include/usb.h @@ -154,8 +154,8 @@ enum usb_init_type { defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \ defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \ defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \ - defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_XHCI) || \ - defined(CONFIG_USB_DWC2) + defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_MUSB_SUNXI) || \ + defined(CONFIG_USB_XHCI) || defined(CONFIG_USB_DWC2)
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller); int usb_lowlevel_stop(int index);