153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2009 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief TAS5706A Power DAC i2c driver.
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*
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*
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* \author Francesco Sacchi <batt@develer.com>
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* \author Daniele Basile <asterix@develer.com>
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*/
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#include "tas5706a.h"
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#include "hw/hw_tas5706a.h"
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#include "cfg/cfg_tas5706a.h"
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#include "cfg/cfg_i2c.h"
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#include <cfg/module.h>
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#include <drv/i2c.h>
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#include <drv/timer.h>
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typedef uint8_t tas_addr_t;
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#define TAS_ADDR 0x36
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#define TRIM_REG 0x1B
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#define SYS_REG2 0x05
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#define VOLUME_REG 0x07
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#define MUTE_VOL 0xFF
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#define DB_TO_REG(db) ((24 - (db)) * 2)
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#define CH1_VOL_REG 0x08
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#define CH2_VOL_REG 0x09
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#define CH3_VOL_REG 0x0A
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#define CH4_VOL_REG 0x0B
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INLINE bool tas5706a_putc(I2c *i2c, tas_addr_t addr, uint8_t ch)
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{
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i2c_start_w(i2c, TAS_ADDR, 2, I2C_STOP);
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i2c_putc(i2c, addr);
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i2c_putc(i2c, ch);
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if (i2c_error(i2c))
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return false;
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return true;
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}
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INLINE int tas5706a_getc(I2c *i2c, tas_addr_t addr)
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{
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int ch;
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i2c_start_w(i2c, TAS_ADDR, 2, I2C_NOSTOP);
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i2c_putc(i2c, addr);
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i2c_start_r(i2c, TAS_ADDR, 1, I2C_STOP);
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ch = (int)(uint8_t)i2c_getc(i2c);
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if (i2c_error(i2c))
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return EOF;
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return ch;
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}
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void tas5706a_setVolume_3(I2c *i2c, Tas5706aCh ch, tas5706a_vol_t vol)
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{
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ASSERT(ch < TAS_CNT);
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ASSERT(vol <= TAS_VOL_MAX);
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tas_addr_t addr1, addr2;
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switch(ch)
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{
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case TAS_CH1:
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addr1 = CH1_VOL_REG;
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addr2 = CH3_VOL_REG;
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break;
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case TAS_CH2:
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addr1 = CH2_VOL_REG;
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addr2 = CH4_VOL_REG;
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break;
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default:
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ASSERT(0);
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return;
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}
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uint8_t vol_att = 0xff - ((vol * 0xff) / TAS_VOL_MAX);
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tas5706a_putc(i2c, addr1, vol_att);
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tas5706a_putc(i2c, addr2, vol_att);
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}
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void tas5706a_setLowPower_2(I2c *i2c, bool val)
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{
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ASSERT(i2c);
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TAS5706A_SETPOWERDOWN(val);
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TAS5706A_SETMUTE(val);
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}
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void tas5706a_init_1(I2c *i2c)
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{
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ASSERT(i2c);
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MOD_CHECK(timer);
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TAS5706A_PIN_INIT();
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timer_delay(200);
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TAS5706A_SETPOWERDOWN(false);
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TAS5706A_SETMUTE(false);
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TAS5706A_MCLK_INIT();
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timer_delay(2);
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TAS5706A_SETRESET(false);
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timer_delay(20);
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tas5706a_putc(i2c, TRIM_REG, 0x00);
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tas5706a_putc(i2c, VOLUME_REG, DB_TO_REG(CONFIG_TAS_MAX_VOL));
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/* Unmute */
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tas5706a_putc(i2c, SYS_REG2, 0);
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}
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