usb: add twl4030 phy support
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
parent
b0e989f618
commit
f1329a1500
|
@ -4,3 +4,6 @@ config USB_ULPI
|
|||
config USB_ISP1504
|
||||
select USB_ULPI
|
||||
bool "ISP1504 Tranceiver support"
|
||||
|
||||
config USB_TWL4030
|
||||
bool "TWL4030 Tranceiver support"
|
||||
|
|
|
@ -1,2 +1,4 @@
|
|||
obj-$(CONFIG_USB_ULPI) += ulpi.o
|
||||
obj-$(CONFIG_USB_ISP1504) += isp1504.o
|
||||
obj-$(CONFIG_USB_TWL4030) += twl4030.o
|
||||
|
||||
|
|
|
@ -0,0 +1,199 @@
|
|||
/*
|
||||
* Copyright (c) 2009 Wind River Systems, Inc.
|
||||
* Tom Rix <Tom.Rix@windriver.com>
|
||||
*
|
||||
* This is file is based on
|
||||
* repository git.gitorious.org/u-boot-omap3/mainline.git,
|
||||
* branch omap3-dev-usb, file drivers/usb/gadget/twl4030_usb.c
|
||||
*
|
||||
* This is the unique part of its copyright :
|
||||
*
|
||||
* ------------------------------------------------------------------------
|
||||
*
|
||||
* * (C) Copyright 2009 Atin Malaviya (atin.malaviya@gmail.com)
|
||||
*
|
||||
* Based on: twl4030_usb.c in linux 2.6 (drivers/i2c/chips/twl4030_usb.c)
|
||||
* Copyright (C) 2004-2007 Texas Instruments
|
||||
* Copyright (C) 2008 Nokia Corporation
|
||||
* Contact: Felipe Balbi <felipe.balbi@nokia.com>
|
||||
*
|
||||
* Author: Atin Malaviya (atin.malaviya@gmail.com)
|
||||
*
|
||||
* ------------------------------------------------------------------------
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#include <i2c/twl4030.h>
|
||||
#include <usb/twl4030.h>
|
||||
#include <clock.h>
|
||||
|
||||
static int twl4030_usb_write(u8 address, u8 data)
|
||||
{
|
||||
int ret;
|
||||
struct twl4030 *twl4030 = twl4030_get();
|
||||
|
||||
ret = twl4030_reg_write(twl4030, address, data);
|
||||
if (ret != 0)
|
||||
printf("TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int twl4030_usb_read(u8 address)
|
||||
{
|
||||
u8 data;
|
||||
int ret;
|
||||
struct twl4030 *twl4030 = twl4030_get();
|
||||
|
||||
ret = twl4030_reg_read(twl4030, address, &data);
|
||||
if (ret == 0)
|
||||
ret = data;
|
||||
else
|
||||
printf("TWL4030:USB:Read[0x%x] Error %d\n", address, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void twl4030_power_init(void)
|
||||
{
|
||||
unsigned char byte;
|
||||
struct twl4030 *twl4030 = twl4030_get();
|
||||
|
||||
/* set VAUX3 to 2.8V */
|
||||
byte = TWL4030_PM_RECEIVER_DEV_GRP_P1;
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VAUX3_DEV_GRP, byte);
|
||||
byte = TWL4030_PM_RECEIVER_VAUX3_VSEL_28;
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VAUX3_DEDICATED, byte);
|
||||
|
||||
/* set VPLL2 to 1.8V */
|
||||
byte = TWL4030_PM_RECEIVER_DEV_GRP_ALL;
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VPLL2_DEV_GRP, byte);
|
||||
byte = TWL4030_PM_RECEIVER_VPLL2_VSEL_18;
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VPLL2_DEDICATED, byte);
|
||||
|
||||
/* set VDAC to 1.8V */
|
||||
byte = TWL4030_PM_RECEIVER_DEV_GRP_P1;
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VDAC_DEV_GRP, byte);
|
||||
byte = TWL4030_PM_RECEIVER_VDAC_VSEL_18;
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VDAC_DEDICATED, byte);
|
||||
}
|
||||
|
||||
static void twl4030_usb_ldo_init(void)
|
||||
{
|
||||
struct twl4030 *twl4030 = twl4030_get();
|
||||
/* Enable writing to power configuration registers */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_MASTER_PROTECT_KEY, 0xC0);
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_MASTER_PROTECT_KEY, 0x0C);
|
||||
|
||||
/* put VUSB3V1 LDO in active state */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB_DEDICATED2, 0x00);
|
||||
|
||||
/* input to VUSB3V1 LDO is from VBAT, not VBUS */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB_DEDICATED1, 0x14);
|
||||
|
||||
/* turn on 3.1V regulator */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB3V1_DEV_GRP, 0x20);
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB3V1_TYPE, 0x00);
|
||||
|
||||
/* turn on 1.5V regulator */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB1V5_DEV_GRP, 0x20);
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB1V5_TYPE, 0x00);
|
||||
|
||||
/* turn on 1.8V regulator */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB1V8_DEV_GRP, 0x20);
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_RECEIVER_VUSB1V8_TYPE, 0x00);
|
||||
|
||||
/* disable access to power configuration registers */
|
||||
twl4030_reg_write(twl4030, TWL4030_PM_MASTER_PROTECT_KEY, 0x0 );
|
||||
|
||||
twl4030_reg_write(twl4030, TWL4030_BASEADD_LED, 0x33); /* FIXME *need to enable LED to get USB power? */
|
||||
|
||||
}
|
||||
|
||||
static void twl4030_phy_power(void)
|
||||
{
|
||||
u8 pwr, clk;
|
||||
/* Power the PHY */
|
||||
pwr = twl4030_usb_read(TWL4030_USB_PHY_PWR_CTRL);
|
||||
pwr &= ~PHYPWD;
|
||||
twl4030_usb_write(TWL4030_USB_PHY_PWR_CTRL, pwr);
|
||||
/* Enable clocks */
|
||||
clk = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL);
|
||||
clk |= CLOCKGATING_EN | CLK32K_EN;
|
||||
twl4030_usb_write(TWL4030_USB_PHY_CLK_CTRL, clk);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initiaze the ULPI interface
|
||||
* ULPI : Universal Transceiver Macrocell Low Pin Interface
|
||||
* An interface between the USB link controller like musb and the
|
||||
* the PHY or transceiver that drives the actual bus.
|
||||
*/
|
||||
int twl4030_usb_ulpi_init(void)
|
||||
{
|
||||
u8 clk, sts, pwr;
|
||||
uint64_t start;
|
||||
long timeout = 1000 * 1000; /* 1 sec */;
|
||||
|
||||
/* power up the twl4030 */
|
||||
twl4030_power_init();
|
||||
|
||||
/* twl4030 ldo init */
|
||||
twl4030_usb_ldo_init();
|
||||
|
||||
/* Enable the twl4030 phy */
|
||||
twl4030_phy_power();
|
||||
|
||||
/* Enable DPLL to access PHY registers over I2C */
|
||||
clk = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL);
|
||||
clk |= REQ_PHY_DPLL_CLK;
|
||||
twl4030_usb_write(TWL4030_USB_PHY_CLK_CTRL, clk);
|
||||
|
||||
/* Check if the PHY DPLL is locked */
|
||||
sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS);
|
||||
start = get_time_ns();
|
||||
while (!(sts & PHY_DPLL_CLK)) {
|
||||
udelay(10);
|
||||
sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS);
|
||||
printf("Error:TWL4030:USB Timeout setting PHY DPLL clock\n");
|
||||
if (is_timeout(start, timeout * USECOND)) {
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* There are two circuit blocks attached to the PHY,
|
||||
* Carkit and USB OTG. Disable Carkit and enable USB OTG
|
||||
*/
|
||||
twl4030_usb_write(TWL4030_USB_IFC_CTRL_CLR, CARKITMODE);
|
||||
pwr = twl4030_usb_read(TWL4030_USB_POWER_CTRL);
|
||||
pwr |= OTG_ENAB;
|
||||
twl4030_usb_write(TWL4030_USB_POWER_CTRL_SET, pwr);
|
||||
|
||||
/* Clear the opmode bits to ensure normal encode */
|
||||
twl4030_usb_write(TWL4030_USB_FUNC_CTRL_CLR, OPMODE_MASK);
|
||||
|
||||
/* Clear the xcvrselect bits to enable the high speed transeiver */
|
||||
twl4030_usb_write(TWL4030_USB_FUNC_CTRL_CLR, XCVRSELECT_MASK);
|
||||
|
||||
/* Let ULPI control the DPLL clock */
|
||||
clk = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL);
|
||||
clk &= ~REQ_PHY_DPLL_CLK;
|
||||
twl4030_usb_write(TWL4030_USB_PHY_CLK_CTRL, clk);
|
||||
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,28 @@
|
|||
/*
|
||||
* Copyright (C) 2010 Michael Grzeschik <mgr@pengutronix.de>
|
||||
* Copyright (C) 2010 Sascha Hauer <sha@pengutronix.de>
|
||||
*
|
||||
* This file is released under the GPLv2
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __USB_TWL4030_H
|
||||
#define __USB_TWL4030_H
|
||||
|
||||
/* Defines for bits in registers */
|
||||
#define OPMODE_MASK (3 << 3)
|
||||
#define XCVRSELECT_MASK (3 << 0)
|
||||
#define CARKITMODE (1 << 2)
|
||||
#define OTG_ENAB (1 << 5)
|
||||
#define PHYPWD (1 << 0)
|
||||
#define CLOCKGATING_EN (1 << 2)
|
||||
#define CLK32K_EN (1 << 1)
|
||||
#define REQ_PHY_DPLL_CLK (1 << 0)
|
||||
#define PHY_DPLL_CLK (1 << 0)
|
||||
|
||||
/*
|
||||
* USB
|
||||
*/
|
||||
int twl4030_usb_ulpi_init(void);
|
||||
|
||||
#endif /* __USB_TWL4030_H */
|
Loading…
Reference in New Issue