[U-Boot] [PATCH 3/8] TWL4030 Add usb PHY support

Tom Rix
2009-09-28T16:37:24Z

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 | 1 +
drivers/usb/phy/Makefile | 44 +++++++++++
drivers/usb/phy/twl4030.c | 189 +++++++++++++++++++++++++++++++++++++++++++++
include/twl4030.h | 143 ++++++++++++++++++++++++++++++----
4 files changed, 362 insertions(+), 15 deletions(-)
create mode 100644 drivers/usb/phy/Makefile
create mode 100644 drivers/usb/phy/twl4030.c

diff --git a/Makefile b/Makefile
index 356ca29..7ceb066 100644
--- a/Makefile
+++ b/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
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
new file mode 100644
index 0000000..200b907
--- /dev/null
+++ b/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
+
+#########################################################################
diff --git a/drivers/usb/phy/twl4030.c b/drivers/usb/phy/twl4030.c
new file mode 100644
index 0000000..54d2e61
--- /dev/null
+++ b/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 at 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 at 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;
+}
diff --git a/include/twl4030.h b/include/twl4030.h
index f260ecb..feaec47 100644
--- a/include/twl4030.h
+++ b/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 */
--
1.6.0.6