TWL4030 Add usb PHY support

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>

Makefile

@@ -243,6 +243,7 @@ LIBS += drivers/twserial/libtws.a
 LIBS += drivers/usb/gadget/libusb_gadget.a
 LIBS += drivers/usb/host/libusb_host.a
 LIBS += drivers/usb/musb/libusb_musb.a
+LIBS += drivers/usb/phy/libusb_phy.a
 LIBS += drivers/video/libvideo.a
 LIBS += drivers/watchdog/libwatchdog.a
 LIBS += common/libcommon.a

drivers/usb/phy/Makefile

@@ -0,0 +1,44 @@
+#
+# Copyright (c) 2009 Wind River Systems, Inc.
+# Tom Rix <Tom.Rix@windriver.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 $(TOPDIR)/config.mk
+
+LIB	:= $(obj)libusb_phy.a
+
+COBJS-$(CONFIG_TWL4030_USB) += twl4030.o
+COBJS-y := twl4030.o
+
+COBJS	:= $(COBJS-y)
+SRCS	:= $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+
+all:	$(LIB)
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################

drivers/usb/phy/twl4030.c

@@ -0,0 +1,189 @@
+/*
+ * 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 <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)
+
+static int twl4030_usb_write(u8 address, u8 data)
+{
+	int ret;
+
+	ret = twl4030_i2c_write_u8(TWL4030_CHIP_USB, data, address);
+	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;
+
+	ret = twl4030_i2c_read_u8(TWL4030_CHIP_USB, &data, address);
+	if (ret == 0)
+		ret = data;
+	else
+		printf("TWL4030:USB:Read[0x%x] Error %d\n", address, ret);
+
+	return ret;
+}
+
+static void twl4030_usb_ldo_init(void)
+{
+	/* Enable writing to power configuration registers */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, 0xC0,
+			     TWL4030_PM_MASTER_PROTECT_KEY);
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, 0x0C,
+			     TWL4030_PM_MASTER_PROTECT_KEY);
+
+	/* put VUSB3V1 LDO in active state */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00,
+			     TWL4030_PM_RECEIVER_VUSB_DEDICATED2);
+
+	/* input to VUSB3V1 LDO is from VBAT, not VBUS */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x14,
+			     TWL4030_PM_RECEIVER_VUSB_DEDICATED1);
+
+	/* turn on 3.1V regulator */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x20,
+			     TWL4030_PM_RECEIVER_VUSB3V1_DEV_GRP);
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00,
+			     TWL4030_PM_RECEIVER_VUSB3V1_TYPE);
+
+	/* turn on 1.5V regulator */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x20,
+			     TWL4030_PM_RECEIVER_VUSB1V5_DEV_GRP);
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00,
+			     TWL4030_PM_RECEIVER_VUSB1V5_TYPE);
+
+	/* turn on 1.8V regulator */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x20,
+			     TWL4030_PM_RECEIVER_VUSB1V8_DEV_GRP);
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, 0x00,
+			     TWL4030_PM_RECEIVER_VUSB1V8_TYPE);
+
+	/* disable access to power configuration registers */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, 0x00,
+			     TWL4030_PM_MASTER_PROTECT_KEY);
+}
+
+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)
+{
+	long timeout = 1000 * 1000; /* 1 sec */;
+	u8 clk, sts, pwr;
+
+	/* 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);
+	while (!(sts & PHY_DPLL_CLK) && 0 < timeout) {
+		udelay(10);
+		sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS);
+		timeout -= 10;
+	}
+
+	/* Final check */
+	sts = twl4030_usb_read(TWL4030_USB_PHY_CLK_CTRL_STS);
+	if (!(sts & PHY_DPLL_CLK)) {
+		printf("Error:TWL4030:USB Timeout setting PHY DPLL clock\n");
+		return -1;
+	}
+
+	/*
+	 * 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;
+}

include/twl4030.h

@@ -342,21 +342,129 @@
 #define TWL4030_KEYPAD_CTRL_SOFT_NRST			(1 << 0)
 
 /* USB */
-#define TWL4030_USB_FUNC_CTRL				(0x04)
-#define TWL4030_USB_OPMODE_MASK				(3 << 3)
-#define TWL4030_USB_XCVRSELECT_MASK			(3 << 0)
-#define TWL4030_USB_IFC_CTRL				(0x07)
-#define TWL4030_USB_CARKITMODE				(1 << 2)
-#define TWL4030_USB_POWER_CTRL				(0xAC)
-#define TWL4030_USB_OTG_ENAB				(1 << 5)
-#define TWL4030_USB_PHY_PWR_CTRL			(0xFD)
-#define TWL4030_USB_PHYPWD				(1 << 0)
-#define TWL4030_USB_PHY_CLK_CTRL			(0xFE)
-#define TWL4030_USB_CLOCKGATING_EN			(1 << 2)
-#define TWL4030_USB_CLK32K_EN				(1 << 1)
-#define TWL4030_USB_REQ_PHY_DPLL_CLK			(1 << 0)
-#define TWL4030_USB_PHY_CLK_CTRL_STS			(0xFF)
-#define TWL4030_USB_PHY_DPLL_CLK			(1 << 0)
+#define TWL4030_USB_VENDOR_ID_LO			0x00
+#define TWL4030_USB_VENDOR_ID_HI			0x01
+#define TWL4030_USB_PRODUCT_ID_LO			0x02
+#define TWL4030_USB_PRODUCT_ID_HI			0x03
+#define TWL4030_USB_FUNC_CTRL				0x04
+#define TWL4030_USB_FUNC_CTRL_SET			0x05
+#define TWL4030_USB_FUNC_CTRL_CLR			0x06
+#define TWL4030_USB_IFC_CTRL				0x07
+#define TWL4030_USB_IFC_CTRL_SET			0x08
+#define TWL4030_USB_IFC_CTRL_CLR			0x09
+#define TWL4030_USB_OTG_CTRL				0x0A
+#define TWL4030_USB_OTG_CTRL_SET			0x0B
+#define TWL4030_USB_OTG_CTRL_CLR			0x0C
+#define TWL4030_USB_USB_INT_EN_RISE			0x0D
+#define TWL4030_USB_USB_INT_EN_RISE_SET			0x0E
+#define TWL4030_USB_USB_INT_EN_RISE_CLR			0x0F
+#define TWL4030_USB_USB_INT_EN_FALL			0x10
+#define TWL4030_USB_USB_INT_EN_FALL_SET			0x11
+#define TWL4030_USB_USB_INT_EN_FALL_CLR			0x12
+#define TWL4030_USB_USB_INT_STS				0x13
+#define TWL4030_USB_USB_INT_LATCH			0x14
+#define TWL4030_USB_DEBUG				0x15
+#define TWL4030_USB_SCRATCH_REG				0x16
+#define TWL4030_USB_SCRATCH_REG_SET			0x17
+#define TWL4030_USB_SCRATCH_REG_CLR			0x18
+#define TWL4030_USB_CARKIT_CTRL				0x19
+#define TWL4030_USB_CARKIT_CTRL_SET			0x1A
+#define TWL4030_USB_CARKIT_CTRL_CLR			0x1B
+#define TWL4030_USB_CARKIT_INT_DELAY			0x1C
+#define TWL4030_USB_CARKIT_INT_EN			0x1D
+#define TWL4030_USB_CARKIT_INT_EN_SET			0x1E
+#define TWL4030_USB_CARKIT_INT_EN_CLR			0x1F
+#define TWL4030_USB_CARKIT_INT_STS			0x20
+#define TWL4030_USB_CARKIT_INT_LATCH			0x21
+#define TWL4030_USB_CARKIT_PLS_CTRL			0x22
+#define TWL4030_USB_CARKIT_PLS_CTRL_SET			0x23
+#define TWL4030_USB_CARKIT_PLS_CTRL_CLR			0x24
+#define TWL4030_USB_TRANS_POS_WIDTH			0x25
+#define TWL4030_USB_TRANS_NEG_WIDTH			0x26
+#define TWL4030_USB_RCV_PLTY_RECOVERY			0x27
+#define TWL4030_USB_MCPC_CTRL				0x30
+#define TWL4030_USB_MCPC_CTRL_SET			0x31
+#define TWL4030_USB_MCPC_CTRL_CLR			0x32
+#define TWL4030_USB_MCPC_IO_CTRL			0x33
+#define TWL4030_USB_MCPC_IO_CTRL_SET			0x34
+#define TWL4030_USB_MCPC_IO_CTRL_CLR			0x35
+#define TWL4030_USB_MCPC_CTRL2				0x36
+#define TWL4030_USB_MCPC_CTRL2_SET			0x37
+#define TWL4030_USB_MCPC_CTRL2_CLR			0x38
+#define TWL4030_USB_OTHER_FUNC_CTRL			0x80
+#define TWL4030_USB_OTHER_FUNC_CTRL_SET			0x81
+#define TWL4030_USB_OTHER_FUNC_CTRL_CLR			0x82
+#define TWL4030_USB_OTHER_IFC_CTRL			0x83
+#define TWL4030_USB_OTHER_IFC_CTRL_SET			0x84
+#define TWL4030_USB_OTHER_IFC_CTRL_CLR			0x85
+#define TWL4030_USB_OTHER_INT_EN_RISE_SET		0x87
+#define TWL4030_USB_OTHER_INT_EN_RISE_CLR		0x88
+#define TWL4030_USB_OTHER_INT_EN_FALL			0x89
+#define TWL4030_USB_OTHER_INT_EN_FALL_SET		0x8A
+#define TWL4030_USB_OTHER_INT_EN_FALL_CLR		0x8B
+#define TWL4030_USB_OTHER_INT_STS			0x8C
+#define TWL4030_USB_OTHER_INT_LATCH			0x8D
+#define TWL4030_USB_ID_STATUS				0x96
+#define TWL4030_USB_CARKIT_SM_1_INT_EN			0x97
+#define TWL4030_USB_CARKIT_SM_1_INT_EN_SET		0x98
+#define TWL4030_USB_CARKIT_SM_1_INT_EN_CLR		0x99
+#define TWL4030_USB_CARKIT_SM_1_INT_STS			0x9A
+#define TWL4030_USB_CARKIT_SM_1_INT_LATCH		0x9B
+#define TWL4030_USB_CARKIT_SM_2_INT_EN			0x9C
+#define TWL4030_USB_CARKIT_SM_2_INT_EN_SET		0x9D
+#define TWL4030_USB_CARKIT_SM_2_INT_EN_CLR		0x9E
+#define TWL4030_USB_CARKIT_SM_2_INT_STS			0x9F
+#define TWL4030_USB_CARKIT_SM_2_INT_LATCH		0xA0
+#define TWL4030_USB_CARKIT_SM_CTRL			0xA1
+#define TWL4030_USB_CARKIT_SM_CTRL_SET			0xA2
+#define TWL4030_USB_CARKIT_SM_CTRL_CLR			0xA3
+#define TWL4030_USB_CARKIT_SM_CMD			0xA4
+#define TWL4030_USB_CARKIT_SM_CMD_SET			0xA5
+#define TWL4030_USB_CARKIT_SM_CMD_CLR			0xA6
+#define TWL4030_USB_CARKIT_SM_CMD_STS			0xA7
+#define TWL4030_USB_CARKIT_SM_STATUS			0xA8
+#define TWL4030_USB_CARKIT_SM_ERR_STATUS		0xAA
+#define TWL4030_USB_CARKIT_SM_CTRL_STATE		0xAB
+#define TWL4030_USB_POWER_CTRL				0xAC
+#define TWL4030_USB_POWER_CTRL_SET			0xAD
+#define TWL4030_USB_POWER_CTRL_CLR			0xAE
+#define TWL4030_USB_OTHER_IFC_CTRL2			0xAF
+#define TWL4030_USB_OTHER_IFC_CTRL2_SET			0xB0
+#define TWL4030_USB_OTHER_IFC_CTRL2_CLR			0xB1
+#define TWL4030_USB_REG_CTRL_EN				0xB2
+#define TWL4030_USB_REG_CTRL_EN_SET			0xB3
+#define TWL4030_USB_REG_CTRL_EN_CLR			0xB4
+#define TWL4030_USB_REG_CTRL_ERROR			0xB5
+#define TWL4030_USB_OTHER_FUNC_CTRL2			0xB8
+#define TWL4030_USB_OTHER_FUNC_CTRL2_SET		0xB9
+#define TWL4030_USB_OTHER_FUNC_CTRL2_CLR		0xBA
+#define TWL4030_USB_CARKIT_ANA_CTRL			0xBB
+#define TWL4030_USB_CARKIT_ANA_CTRL_SET			0xBC
+#define TWL4030_USB_CARKIT_ANA_CTRL_CLR			0xBD
+#define TWL4030_USB_VBUS_DEBOUNCE			0xC0
+#define TWL4030_USB_ID_DEBOUNCE				0xC1
+#define TWL4030_USB_TPH_DP_CON_MIN			0xC2
+#define TWL4030_USB_TPH_DP_CON_MAX			0xC3
+#define TWL4030_USB_TCR_DP_CON_MIN			0xC4
+#define TWL4030_USB_TCR_DP_CON_MAX			0xC5
+#define TWL4030_USB_TPH_DP_PD_SHORT			0xC6
+#define TWL4030_USB_TPH_CMD_DLY				0xC7
+#define TWL4030_USB_TPH_DET_RST				0xC8
+#define TWL4030_USB_TPH_AUD_BIAS			0xC9
+#define TWL4030_USB_TCR_UART_DET_MIN			0xCA
+#define TWL4030_USB_TCR_UART_DET_MAX			0xCB
+#define TWL4030_USB_TPH_ID_INT_PW			0xCD
+#define TWL4030_USB_TACC_ID_INT_WAIT			0xCE
+#define TWL4030_USB_TACC_ID_INT_PW			0xCF
+#define TWL4030_USB_TPH_CMD_WAIT			0xD0
+#define TWL4030_USB_TPH_ACK_WAIT			0xD1
+#define TWL4030_USB_TPH_DP_DISC_DET			0xD2
+#define TWL4030_USB_VBAT_TIMER				0xD3
+#define TWL4030_USB_CARKIT_4W_DEBUG			0xE0
+#define TWL4030_USB_CARKIT_5W_DEBUG			0xE1
+#define TWL4030_USB_PHY_PWR_CTRL			0xFD
+#define TWL4030_USB_PHY_CLK_CTRL			0xFE
+#define TWL4030_USB_PHY_CLK_CTRL_STS			0xFF
 
 /*
  * Convience functions to read and write from TWL4030
@@ -398,4 +506,9 @@ void twl4030_power_mmc_init(void);
  */
 void twl4030_led_init(void);
 
+/*
+ * USB
+ */
+int twl4030_usb_ulpi_init(void);
+
 #endif /* TWL4030_H */