170 lines
5.1 KiB
C
170 lines
5.1 KiB
C
/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <debug.h>
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#include <sys/types.h>
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#include <dev/i2c.h>
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#include <dev/twl4030.h>
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#include "twl4030_hw.h"
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// XXX move to target specific setup
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#define TWL_I2C_BUS 0
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void twl4030_init(void)
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{
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}
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static int twl4030_usb_write(uint8_t address, uint8_t data)
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{
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return i2c_write_reg(TWL_I2C_BUS, TWL_USB_ADDR, address, data);
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}
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static int twl4030_usb_read(uint8_t address)
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{
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uint8_t data;
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int err = i2c_read_reg(TWL_I2C_BUS, TWL_USB_ADDR, address, &data);
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if (err < 0)
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return err;
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return data;
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}
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static int twl4030_usb_set_bits(uint8_t reg, uint8_t bits)
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{
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return twl4030_usb_write(reg + 1, bits);
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}
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static int twl4030_usb_clear_bits(uint8_t reg, uint8_t bits)
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{
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return twl4030_usb_write(reg + 2, bits);
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}
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static void twl4030_i2c_access(bool on)
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{
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int val;
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if ((val = twl4030_usb_read(PHY_CLK_CTRL)) >= 0) {
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if (on) {
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/* enable DPLL to access PHY registers over I2C */
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val |= REQ_PHY_DPLL_CLK;
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twl4030_usb_write(PHY_CLK_CTRL, (uint8_t)val);
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while (!(twl4030_usb_read(PHY_CLK_CTRL_STS) & PHY_DPLL_CLK)) {
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spin(10);
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}
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if (!(twl4030_usb_read(PHY_CLK_CTRL_STS) & PHY_DPLL_CLK))
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printf("Timeout setting T2 HSUSB " "PHY DPLL clock\n");
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} else {
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/* let ULPI control the DPLL clock */
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val &= ~REQ_PHY_DPLL_CLK;
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twl4030_usb_write(PHY_CLK_CTRL, (uint8_t)val);
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}
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}
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return;
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}
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int twl4030_usb_reset(void)
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{
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TRACE_ENTRY;
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#if 0
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twl4030_usb_clear_bits(OTG_CTRL, DMPULLDOWN | DPPULLDOWN);
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twl4030_usb_clear_bits(USB_INT_EN_RISE, ~0);
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twl4030_usb_clear_bits(USB_INT_EN_FALL, ~0);
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twl4030_usb_clear_bits(MCPC_IO_CTRL, ~TXDTYP);
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twl4030_usb_set_bits(MCPC_IO_CTRL, TXDTYP);
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twl4030_usb_clear_bits(OTHER_FUNC_CTRL, (BDIS_ACON_EN | FIVEWIRE_MODE));
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twl4030_usb_clear_bits(OTHER_IFC_CTRL, ~0);
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twl4030_usb_clear_bits(OTHER_INT_EN_RISE, ~0);
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twl4030_usb_clear_bits(OTHER_INT_EN_FALL, ~0);
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twl4030_usb_clear_bits(OTHER_IFC_CTRL2, ~0);
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twl4030_usb_clear_bits(REG_CTRL_EN, ULPI_I2C_CONFLICT_INTEN);
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twl4030_usb_clear_bits(OTHER_FUNC_CTRL2, VBAT_TIMER_EN);
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#endif
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/* Enable writing to power configuration registers */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, PROTECT_KEY, 0xC0);
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, PROTECT_KEY, 0x0C);
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/* put VUSB3V1 LDO in active state */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB_DEDICATED2, 0);
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/* input to VUSB3V1 LDO is from VBAT, not VBUS */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB_DEDICATED1, 0x14);
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/* turn on 3.1V regulator */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB3V1_DEV_GRP, 0x20);
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB3V1_TYPE, 0);
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/* turn on 1.5V regulator */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB1V5_DEV_GRP, 0x20);
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB1V5_TYPE, 0);
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/* turn on 1.8V regulator */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB1V8_DEV_GRP, 0x20);
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, VUSB1V8_TYPE, 0);
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/* disable access to power configuration registers */
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i2c_write_reg(TWL_I2C_BUS, TWL_PM_RECEIVER_ADDR, PROTECT_KEY, 0);
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/* turn on the phy */
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uint8_t pwr = twl4030_usb_read(PHY_PWR_CTRL);
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pwr &= ~PHYPWD;
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twl4030_usb_write(PHY_PWR_CTRL, pwr);
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twl4030_usb_write(PHY_CLK_CTRL,
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twl4030_usb_read(PHY_CLK_CTRL) |
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(CLOCKGATING_EN | CLK32K_EN));
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/* set DPLL i2c access mode */
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twl4030_i2c_access(true);
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/* set ulpi mode */
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twl4030_usb_clear_bits(IFC_CTRL, CARKITMODE);
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twl4030_usb_set_bits(POWER_CTRL, OTG_ENAB);
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twl4030_usb_write(FUNC_CTRL, XCVRSELECT_HS); // set high speed mode
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// twl4030_usb_write(FUNC_CTRL, XCVRSELECT_FS); // set full speed mode
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twl4030_i2c_access(false);
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return 0;
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}
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int twl4030_init_hs(void)
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{
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return 0;
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}
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int twl4030_set_usb_pullup(bool pullup)
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{
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TRACE_ENTRY;
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if (pullup) {
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twl4030_usb_clear_bits(OTG_CTRL, DPPULLDOWN);
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twl4030_usb_set_bits(FUNC_CTRL, TERMSELECT);
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} else {
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twl4030_usb_clear_bits(FUNC_CTRL, TERMSELECT);
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twl4030_usb_set_bits(OTG_CTRL, DPPULLDOWN);
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}
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return 0;
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}
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