![Axel Lin](/assets/img/avatar_default.png)
Use gpio_request_one() instead of multiple gpiolib calls. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
626 lines
15 KiB
C
626 lines
15 KiB
C
/*
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* MFD driver for TWL6040 audio device
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*
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* Authors: Misael Lopez Cruz <misael.lopez@ti.com>
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* Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
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* Peter Ujfalusi <peter.ujfalusi@ti.com>
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*
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* Copyright: (C) 2011 Texas Instruments, Inc.
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/i2c/twl.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/twl6040.h>
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#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
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int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
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{
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int ret;
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u8 val = 0;
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mutex_lock(&twl6040->io_mutex);
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/* Vibra control registers from cache */
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if (unlikely(reg == TWL6040_REG_VIBCTLL ||
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reg == TWL6040_REG_VIBCTLR)) {
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val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
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} else {
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ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
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if (ret < 0) {
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mutex_unlock(&twl6040->io_mutex);
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return ret;
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}
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}
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mutex_unlock(&twl6040->io_mutex);
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return val;
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}
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EXPORT_SYMBOL(twl6040_reg_read);
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int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
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{
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int ret;
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mutex_lock(&twl6040->io_mutex);
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ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
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/* Cache the vibra control registers */
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if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
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twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
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mutex_unlock(&twl6040->io_mutex);
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return ret;
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}
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EXPORT_SYMBOL(twl6040_reg_write);
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int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
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{
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int ret;
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u8 val;
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mutex_lock(&twl6040->io_mutex);
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ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
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if (ret)
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goto out;
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val |= mask;
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ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
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out:
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mutex_unlock(&twl6040->io_mutex);
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return ret;
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}
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EXPORT_SYMBOL(twl6040_set_bits);
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int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
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{
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int ret;
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u8 val;
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mutex_lock(&twl6040->io_mutex);
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ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
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if (ret)
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goto out;
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val &= ~mask;
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ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
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out:
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mutex_unlock(&twl6040->io_mutex);
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return ret;
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}
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EXPORT_SYMBOL(twl6040_clear_bits);
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/* twl6040 codec manual power-up sequence */
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static int twl6040_power_up(struct twl6040 *twl6040)
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{
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u8 ldoctl, ncpctl, lppllctl;
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int ret;
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/* enable high-side LDO, reference system and internal oscillator */
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ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
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ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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if (ret)
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return ret;
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usleep_range(10000, 10500);
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/* enable negative charge pump */
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ncpctl = TWL6040_NCPENA;
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ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
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if (ret)
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goto ncp_err;
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usleep_range(1000, 1500);
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/* enable low-side LDO */
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ldoctl |= TWL6040_LSLDOENA;
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ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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if (ret)
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goto lsldo_err;
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usleep_range(1000, 1500);
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/* enable low-power PLL */
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lppllctl = TWL6040_LPLLENA;
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ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
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if (ret)
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goto lppll_err;
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usleep_range(5000, 5500);
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/* disable internal oscillator */
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ldoctl &= ~TWL6040_OSCENA;
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ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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if (ret)
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goto osc_err;
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return 0;
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osc_err:
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lppllctl &= ~TWL6040_LPLLENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
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lppll_err:
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ldoctl &= ~TWL6040_LSLDOENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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lsldo_err:
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ncpctl &= ~TWL6040_NCPENA;
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twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
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ncp_err:
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ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
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twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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return ret;
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}
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/* twl6040 manual power-down sequence */
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static void twl6040_power_down(struct twl6040 *twl6040)
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{
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u8 ncpctl, ldoctl, lppllctl;
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ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
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ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
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lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
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/* enable internal oscillator */
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ldoctl |= TWL6040_OSCENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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usleep_range(1000, 1500);
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/* disable low-power PLL */
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lppllctl &= ~TWL6040_LPLLENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
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/* disable low-side LDO */
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ldoctl &= ~TWL6040_LSLDOENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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/* disable negative charge pump */
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ncpctl &= ~TWL6040_NCPENA;
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twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
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/* disable high-side LDO, reference system and internal oscillator */
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ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
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twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
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}
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static irqreturn_t twl6040_naudint_handler(int irq, void *data)
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{
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struct twl6040 *twl6040 = data;
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u8 intid, status;
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intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
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if (intid & TWL6040_READYINT)
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complete(&twl6040->ready);
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if (intid & TWL6040_THINT) {
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status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
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if (status & TWL6040_TSHUTDET) {
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dev_warn(twl6040->dev,
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"Thermal shutdown, powering-off");
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twl6040_power(twl6040, 0);
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} else {
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dev_warn(twl6040->dev,
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"Leaving thermal shutdown, powering-on");
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twl6040_power(twl6040, 1);
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}
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}
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return IRQ_HANDLED;
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}
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static int twl6040_power_up_completion(struct twl6040 *twl6040,
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int naudint)
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{
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int time_left;
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u8 intid;
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time_left = wait_for_completion_timeout(&twl6040->ready,
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msecs_to_jiffies(144));
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if (!time_left) {
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intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
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if (!(intid & TWL6040_READYINT)) {
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dev_err(twl6040->dev,
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"timeout waiting for READYINT\n");
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return -ETIMEDOUT;
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}
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}
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return 0;
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}
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int twl6040_power(struct twl6040 *twl6040, int on)
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{
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int audpwron = twl6040->audpwron;
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int naudint = twl6040->irq;
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int ret = 0;
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mutex_lock(&twl6040->mutex);
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if (on) {
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/* already powered-up */
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if (twl6040->power_count++)
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goto out;
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if (gpio_is_valid(audpwron)) {
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/* use AUDPWRON line */
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gpio_set_value(audpwron, 1);
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/* wait for power-up completion */
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ret = twl6040_power_up_completion(twl6040, naudint);
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if (ret) {
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dev_err(twl6040->dev,
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"automatic power-down failed\n");
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twl6040->power_count = 0;
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goto out;
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}
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} else {
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/* use manual power-up sequence */
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ret = twl6040_power_up(twl6040);
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if (ret) {
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dev_err(twl6040->dev,
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"manual power-up failed\n");
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twl6040->power_count = 0;
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goto out;
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}
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}
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/* Default PLL configuration after power up */
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twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
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twl6040->sysclk = 19200000;
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} else {
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/* already powered-down */
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if (!twl6040->power_count) {
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dev_err(twl6040->dev,
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"device is already powered-off\n");
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ret = -EPERM;
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goto out;
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}
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if (--twl6040->power_count)
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goto out;
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if (gpio_is_valid(audpwron)) {
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/* use AUDPWRON line */
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gpio_set_value(audpwron, 0);
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/* power-down sequence latency */
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usleep_range(500, 700);
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} else {
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/* use manual power-down sequence */
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twl6040_power_down(twl6040);
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}
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twl6040->sysclk = 0;
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}
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out:
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mutex_unlock(&twl6040->mutex);
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return ret;
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}
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EXPORT_SYMBOL(twl6040_power);
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int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
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unsigned int freq_in, unsigned int freq_out)
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{
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u8 hppllctl, lppllctl;
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int ret = 0;
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mutex_lock(&twl6040->mutex);
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hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
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lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
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switch (pll_id) {
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case TWL6040_SYSCLK_SEL_LPPLL:
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/* low-power PLL divider */
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switch (freq_out) {
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case 17640000:
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lppllctl |= TWL6040_LPLLFIN;
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break;
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case 19200000:
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lppllctl &= ~TWL6040_LPLLFIN;
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break;
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default:
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dev_err(twl6040->dev,
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"freq_out %d not supported\n", freq_out);
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ret = -EINVAL;
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goto pll_out;
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}
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
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switch (freq_in) {
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case 32768:
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lppllctl |= TWL6040_LPLLENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
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lppllctl);
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mdelay(5);
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lppllctl &= ~TWL6040_HPLLSEL;
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
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lppllctl);
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hppllctl &= ~TWL6040_HPLLENA;
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twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
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hppllctl);
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break;
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default:
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dev_err(twl6040->dev,
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"freq_in %d not supported\n", freq_in);
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ret = -EINVAL;
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goto pll_out;
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}
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break;
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case TWL6040_SYSCLK_SEL_HPPLL:
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/* high-performance PLL can provide only 19.2 MHz */
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if (freq_out != 19200000) {
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dev_err(twl6040->dev,
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"freq_out %d not supported\n", freq_out);
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ret = -EINVAL;
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goto pll_out;
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}
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hppllctl &= ~TWL6040_MCLK_MSK;
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switch (freq_in) {
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case 12000000:
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/* PLL enabled, active mode */
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hppllctl |= TWL6040_MCLK_12000KHZ |
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TWL6040_HPLLENA;
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break;
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case 19200000:
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/*
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* PLL disabled
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* (enable PLL if MCLK jitter quality
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* doesn't meet specification)
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*/
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hppllctl |= TWL6040_MCLK_19200KHZ;
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break;
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case 26000000:
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/* PLL enabled, active mode */
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hppllctl |= TWL6040_MCLK_26000KHZ |
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TWL6040_HPLLENA;
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break;
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case 38400000:
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/* PLL enabled, active mode */
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hppllctl |= TWL6040_MCLK_38400KHZ |
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TWL6040_HPLLENA;
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break;
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default:
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dev_err(twl6040->dev,
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"freq_in %d not supported\n", freq_in);
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ret = -EINVAL;
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goto pll_out;
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}
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/* enable clock slicer to ensure input waveform is square */
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hppllctl |= TWL6040_HPLLSQRENA;
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twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, hppllctl);
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usleep_range(500, 700);
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lppllctl |= TWL6040_HPLLSEL;
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
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lppllctl &= ~TWL6040_LPLLENA;
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twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
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break;
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default:
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dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
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ret = -EINVAL;
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goto pll_out;
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}
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twl6040->sysclk = freq_out;
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twl6040->pll = pll_id;
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pll_out:
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mutex_unlock(&twl6040->mutex);
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return ret;
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}
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EXPORT_SYMBOL(twl6040_set_pll);
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int twl6040_get_pll(struct twl6040 *twl6040)
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{
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if (twl6040->power_count)
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return twl6040->pll;
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else
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return -ENODEV;
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}
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EXPORT_SYMBOL(twl6040_get_pll);
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unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
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{
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return twl6040->sysclk;
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}
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EXPORT_SYMBOL(twl6040_get_sysclk);
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/* Get the combined status of the vibra control register */
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int twl6040_get_vibralr_status(struct twl6040 *twl6040)
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{
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u8 status;
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status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
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status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
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return status;
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}
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EXPORT_SYMBOL(twl6040_get_vibralr_status);
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static struct resource twl6040_vibra_rsrc[] = {
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{
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource twl6040_codec_rsrc[] = {
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{
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.flags = IORESOURCE_IRQ,
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},
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};
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static int __devinit twl6040_probe(struct platform_device *pdev)
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{
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struct twl4030_audio_data *pdata = pdev->dev.platform_data;
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struct twl6040 *twl6040;
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struct mfd_cell *cell = NULL;
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int ret, children = 0;
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if (!pdata) {
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dev_err(&pdev->dev, "Platform data is missing\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* In order to operate correctly we need valid interrupt config */
|
|
if (!pdata->naudint_irq || !pdata->irq_base) {
|
|
dev_err(&pdev->dev, "Invalid IRQ configuration\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
twl6040 = kzalloc(sizeof(struct twl6040), GFP_KERNEL);
|
|
if (!twl6040)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, twl6040);
|
|
|
|
twl6040->dev = &pdev->dev;
|
|
twl6040->irq = pdata->naudint_irq;
|
|
twl6040->irq_base = pdata->irq_base;
|
|
|
|
mutex_init(&twl6040->mutex);
|
|
mutex_init(&twl6040->io_mutex);
|
|
init_completion(&twl6040->ready);
|
|
|
|
twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
|
|
|
|
/* ERRATA: Automatic power-up is not possible in ES1.0 */
|
|
if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
|
|
twl6040->audpwron = pdata->audpwron_gpio;
|
|
else
|
|
twl6040->audpwron = -EINVAL;
|
|
|
|
if (gpio_is_valid(twl6040->audpwron)) {
|
|
ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
|
|
"audpwron");
|
|
if (ret)
|
|
goto gpio1_err;
|
|
}
|
|
|
|
/* codec interrupt */
|
|
ret = twl6040_irq_init(twl6040);
|
|
if (ret)
|
|
goto gpio2_err;
|
|
|
|
ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
|
|
NULL, twl6040_naudint_handler, 0,
|
|
"twl6040_irq_ready", twl6040);
|
|
if (ret) {
|
|
dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
|
|
ret);
|
|
goto irq_err;
|
|
}
|
|
|
|
/* dual-access registers controlled by I2C only */
|
|
twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
|
|
|
|
if (pdata->codec) {
|
|
int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
|
|
|
|
cell = &twl6040->cells[children];
|
|
cell->name = "twl6040-codec";
|
|
twl6040_codec_rsrc[0].start = irq;
|
|
twl6040_codec_rsrc[0].end = irq;
|
|
cell->resources = twl6040_codec_rsrc;
|
|
cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
|
|
cell->platform_data = pdata->codec;
|
|
cell->pdata_size = sizeof(*pdata->codec);
|
|
children++;
|
|
}
|
|
|
|
if (pdata->vibra) {
|
|
int irq = twl6040->irq_base + TWL6040_IRQ_VIB;
|
|
|
|
cell = &twl6040->cells[children];
|
|
cell->name = "twl6040-vibra";
|
|
twl6040_vibra_rsrc[0].start = irq;
|
|
twl6040_vibra_rsrc[0].end = irq;
|
|
cell->resources = twl6040_vibra_rsrc;
|
|
cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
|
|
|
|
cell->platform_data = pdata->vibra;
|
|
cell->pdata_size = sizeof(*pdata->vibra);
|
|
children++;
|
|
}
|
|
|
|
if (children) {
|
|
ret = mfd_add_devices(&pdev->dev, pdev->id, twl6040->cells,
|
|
children, NULL, 0);
|
|
if (ret)
|
|
goto mfd_err;
|
|
} else {
|
|
dev_err(&pdev->dev, "No platform data found for children\n");
|
|
ret = -ENODEV;
|
|
goto mfd_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
mfd_err:
|
|
free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
|
|
irq_err:
|
|
twl6040_irq_exit(twl6040);
|
|
gpio2_err:
|
|
if (gpio_is_valid(twl6040->audpwron))
|
|
gpio_free(twl6040->audpwron);
|
|
gpio1_err:
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(twl6040);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit twl6040_remove(struct platform_device *pdev)
|
|
{
|
|
struct twl6040 *twl6040 = platform_get_drvdata(pdev);
|
|
|
|
if (twl6040->power_count)
|
|
twl6040_power(twl6040, 0);
|
|
|
|
if (gpio_is_valid(twl6040->audpwron))
|
|
gpio_free(twl6040->audpwron);
|
|
|
|
free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
|
|
twl6040_irq_exit(twl6040);
|
|
|
|
mfd_remove_devices(&pdev->dev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(twl6040);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver twl6040_driver = {
|
|
.probe = twl6040_probe,
|
|
.remove = __devexit_p(twl6040_remove),
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "twl6040",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(twl6040_driver);
|
|
|
|
MODULE_DESCRIPTION("TWL6040 MFD");
|
|
MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
|
|
MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:twl6040");
|