The twl4030 provides a PHY device for connecting a link device, like musb, to physical connection. This change adds the twl4030 usb registers and functions for initializing the PHY as required by omap3. Signed-off-by: Tom Rix <Tom.Rix@windriver.com>master
Tom Rix
16 years ago
committed by
Remy Bohmer
parent
988365a204
commit
bffbb2a86d
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#
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# Copyright (c) 2009 Wind River Systems, Inc.
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# Tom Rix <Tom.Rix@windriver.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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include $(TOPDIR)/config.mk |
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LIB := $(obj)libusb_phy.a
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COBJS-$(CONFIG_TWL4030_USB) += twl4030.o
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COBJS-y := twl4030.o
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COBJS := $(COBJS-y)
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SRCS := $(COBJS:.o=.c)
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OBJS := $(addprefix $(obj),$(COBJS))
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all: $(LIB) |
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$(LIB): $(obj).depend $(OBJS) |
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$(AR) $(ARFLAGS) $@ $(OBJS)
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#########################################################################
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk |
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sinclude $(obj).depend |
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#########################################################################
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@ -0,0 +1,189 @@ |
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/*
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* Copyright (c) 2009 Wind River Systems, Inc. |
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* Tom Rix <Tom.Rix@windriver.com> |
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* |
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* This is file is based on |
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* repository git.gitorious.org/u-boot-omap3/mainline.git, |
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* branch omap3-dev-usb, file drivers/usb/gadget/twl4030_usb.c |
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* |
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* This is the unique part of its copyright : |
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* |
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* ------------------------------------------------------------------------ |
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* |
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* * (C) Copyright 2009 Atin Malaviya (atin.malaviya@gmail.com) |
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* |
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* Based on: twl4030_usb.c in linux 2.6 (drivers/i2c/chips/twl4030_usb.c) |
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* Copyright (C) 2004-2007 Texas Instruments |
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* Copyright (C) 2008 Nokia Corporation |
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* Contact: Felipe Balbi <felipe.balbi@nokia.com> |
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* |
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* Author: Atin Malaviya (atin.malaviya@gmail.com) |
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* |
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* ------------------------------------------------------------------------ |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <twl4030.h> |
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/* Defines for bits in registers */ |
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#define OPMODE_MASK (3 << 3) |
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#define XCVRSELECT_MASK (3 << 0) |
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#define CARKITMODE (1 << 2) |
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#define OTG_ENAB (1 << 5) |
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#define PHYPWD (1 << 0) |
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#define CLOCKGATING_EN (1 << 2) |
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#define CLK32K_EN (1 << 1) |
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#define REQ_PHY_DPLL_CLK (1 << 0) |
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#define PHY_DPLL_CLK (1 << 0) |
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static int twl4030_usb_write(u8 address, u8 data) |
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{ |
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int ret; |
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ret = twl4030_i2c_write_u8(TWL4030_CHIP_USB, data, address); |
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if (ret != 0) |
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printf("TWL4030:USB:Write[0x%x] Error %d\n", address, ret); |
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return ret; |
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} |
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static int twl4030_usb_read(u8 address) |
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{ |
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u8 data; |
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int ret; |
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ret = twl4030_i2c_read_u8(TWL4030_CHIP_USB, &data, address); |
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if (ret == 0) |
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ret = data; |
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else |
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printf("TWL4030:USB:Read[0x%x] Error %d\n", address, ret); |
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return ret; |
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} |
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static void twl4030_usb_ldo_init(void) |
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{ |
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/* Enable writing to power configuration registers */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, 0xC0, |
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TWL4030_PM_MASTER_PROTECT_KEY); |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, 0x0C, |
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TWL4030_PM_MASTER_PROTECT_KEY); |
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/* put VUSB3V1 LDO in active state */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00, |
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TWL4030_PM_RECEIVER_VUSB_DEDICATED2); |
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/* input to VUSB3V1 LDO is from VBAT, not VBUS */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x14, |
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TWL4030_PM_RECEIVER_VUSB_DEDICATED1); |
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/* turn on 3.1V regulator */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x20, |
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TWL4030_PM_RECEIVER_VUSB3V1_DEV_GRP); |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00, |
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TWL4030_PM_RECEIVER_VUSB3V1_TYPE); |
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/* turn on 1.5V regulator */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x20, |
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TWL4030_PM_RECEIVER_VUSB1V5_DEV_GRP); |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00, |
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TWL4030_PM_RECEIVER_VUSB1V5_TYPE); |
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/* turn on 1.8V regulator */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x20, |
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TWL4030_PM_RECEIVER_VUSB1V8_DEV_GRP); |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00, |
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TWL4030_PM_RECEIVER_VUSB1V8_TYPE); |
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/* disable access to power configuration registers */ |
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, 0x00, |
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TWL4030_PM_MASTER_PROTECT_KEY); |
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} |
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static void twl4030_phy_power(void) |
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{ |
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u8 pwr, clk; |
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/* Power the PHY */ |
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pwr = twl4030_usb_read(TWL4030_USB_PHY_PWR_CTRL); |
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pwr &= ~PHYPWD; |
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twl4030_usb_write(TWL4030_USB_PHY_PWR_CTRL, pwr); |
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/* Enable clocks */ |
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clk = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL); |
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clk |= CLOCKGATING_EN | CLK32K_EN; |
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twl4030_usb_write(TWL4030_USB_PHY_CLK_CTRL, clk); |
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} |
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/*
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* Initiaze the ULPI interface |
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* ULPI : Universal Transceiver Macrocell Low Pin Interface |
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* An interface between the USB link controller like musb and the |
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* the PHY or transceiver that drives the actual bus. |
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*/ |
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int twl4030_usb_ulpi_init(void) |
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{ |
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long timeout = 1000 * 1000; /* 1 sec */; |
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u8 clk, sts, pwr; |
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/* twl4030 ldo init */ |
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twl4030_usb_ldo_init(); |
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/* Enable the twl4030 phy */ |
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twl4030_phy_power(); |
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/* Enable DPLL to access PHY registers over I2C */ |
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clk = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL); |
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clk |= REQ_PHY_DPLL_CLK; |
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twl4030_usb_write(TWL4030_USB_PHY_CLK_CTRL, clk); |
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/* Check if the PHY DPLL is locked */ |
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sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS); |
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while (!(sts & PHY_DPLL_CLK) && 0 < timeout) { |
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udelay(10); |
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sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS); |
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timeout -= 10; |
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} |
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/* Final check */ |
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sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS); |
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if (!(sts & PHY_DPLL_CLK)) { |
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printf("Error:TWL4030:USB Timeout setting PHY DPLL clock\n"); |
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return -1; |
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} |
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/*
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* There are two circuit blocks attached to the PHY, |
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* Carkit and USB OTG. Disable Carkit and enable USB OTG |
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*/ |
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twl4030_usb_write(TWL4030_USB_IFC_CTRL_CLR, CARKITMODE); |
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pwr = twl4030_usb_read(TWL4030_USB_POWER_CTRL); |
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pwr |= OTG_ENAB; |
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twl4030_usb_write(TWL4030_USB_POWER_CTRL_SET, pwr); |
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/* Clear the opmode bits to ensure normal encode */ |
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twl4030_usb_write(TWL4030_USB_FUNC_CTRL_CLR, OPMODE_MASK); |
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/* Clear the xcvrselect bits to enable the high speed transeiver */ |
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twl4030_usb_write(TWL4030_USB_FUNC_CTRL_CLR, XCVRSELECT_MASK); |
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/* Let ULPI control the DPLL clock */ |
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clk = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL); |
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clk &= ~REQ_PHY_DPLL_CLK; |
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twl4030_usb_write(TWL4030_USB_PHY_CLK_CTRL, clk); |
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return 0; |
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} |
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