2015-01-12 04:34:48 +09:00
|
|
|
/*
|
|
|
|
* 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>
|
2015-02-17 06:13:43 +09:00
|
|
|
#include <asm/arch/gpio.h>
|
2015-01-12 04:34:48 +09:00
|
|
|
#include <asm/arch/usbc.h>
|
2015-02-17 06:13:43 +09:00
|
|
|
#include <asm-generic/gpio.h>
|
2015-01-12 04:34:48 +09:00
|
|
|
#include "linux-compat.h"
|
|
|
|
#include "musb_core.h"
|
2015-03-09 16:44:16 +09:00
|
|
|
#ifdef CONFIG_AXP152_POWER
|
|
|
|
#include <axp152.h>
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_AXP209_POWER
|
|
|
|
#include <axp209.h>
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_AXP221_POWER
|
|
|
|
#include <axp221.h>
|
|
|
|
#endif
|
2015-01-12 04:34:48 +09:00
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
******************************************************************************
|
|
|
|
* 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_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__);
|
|
|
|
|
2015-02-17 06:13:43 +09:00
|
|
|
if (is_host_enabled(musb)) {
|
|
|
|
int vbus_det = sunxi_name_to_gpio(CONFIG_USB0_VBUS_DET);
|
|
|
|
|
2015-03-09 16:44:16 +09:00
|
|
|
#ifdef AXP_VBUS_DETECT
|
|
|
|
if (!strcmp(CONFIG_USB0_VBUS_DET, "axp_vbus_detect")) {
|
|
|
|
err = axp_get_vbus();
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
} else {
|
|
|
|
#endif
|
|
|
|
if (vbus_det == -1) {
|
|
|
|
eprintf("Error invalid Vusb-det pin\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = gpio_request(vbus_det, "vbus0_det");
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
err = gpio_direction_input(vbus_det);
|
|
|
|
if (err) {
|
|
|
|
gpio_free(vbus_det);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = gpio_get_value(vbus_det);
|
2015-03-16 02:27:44 +09:00
|
|
|
if (err < 0) {
|
2015-03-09 16:44:16 +09:00
|
|
|
gpio_free(vbus_det);
|
|
|
|
return -EIO;
|
|
|
|
}
|
2015-02-17 06:13:43 +09:00
|
|
|
|
|
|
|
gpio_free(vbus_det);
|
2015-03-09 16:44:16 +09:00
|
|
|
#ifdef AXP_VBUS_DETECT
|
2015-02-17 06:13:43 +09:00
|
|
|
}
|
2015-03-09 16:44:16 +09:00
|
|
|
#endif
|
2015-02-17 06:13:43 +09:00
|
|
|
|
|
|
|
if (err) {
|
|
|
|
eprintf("Error: A charger is plugged into the OTG\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-01-12 04:34:48 +09:00
|
|
|
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);
|
|
|
|
} else {
|
|
|
|
/* Peripheral mode */
|
|
|
|
USBC_ForceIdToHigh(musb->mregs);
|
|
|
|
}
|
2015-02-11 17:05:18 +09:00
|
|
|
USBC_ForceVbusValidToHigh(musb->mregs);
|
2015-01-12 04:34:48 +09:00
|
|
|
|
|
|
|
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,
|
|
|
|
};
|