fw/calypso: Add a new driver for the buzzer control
Written-by: Jose Luis Pereira <onaips@gmail.com> Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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LIBRARIES+=calypso
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calypso_DIR=calypso
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calypso_SRCS=arm.c clock.c delay.c dma.c dsp.c du.c i2c.c irq.c rtc.c sim.c spi.c tpu.c tsp.c keypad.c misc.c timer.c backlight.c uart.c uwire.c
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calypso_SRCS=arm.c buzzer.c clock.c delay.c dma.c dsp.c du.c i2c.c irq.c rtc.c sim.c spi.c tpu.c tsp.c keypad.c misc.c timer.c backlight.c uart.c uwire.c
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/* Calypso DBB internal PWT (Pulse Width / T) Buzzer Driver */
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/* (C) 2010 by Jose Pereira <onaips@gmail.com>
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*
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* All Rights Reserved
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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 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdint.h>
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#include <memory.h>
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#define BASE_ADDR_PWL 0xfffe8800
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#define PWT_REG(m) (BASE_ADDR_PWL + (m))
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#define ASIC_CONF_REG 0xfffef008
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#define BUZZ_LEVEL_REG 0xfffe480e
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enum pwt_reg {
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FRC_REG = 0,
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VRC_REG = 1,
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GCR_REG = 2,
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};
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#define ASCONF_PWT_ENA (1 << 5)
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void buzzer_mode_pwt(int on)
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{
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uint16_t reg;
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reg = readw(ASIC_CONF_REG);
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if (on) {
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/* Enable pwt */
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writeb(0x01, PWT_REG(GCR_REG));
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/* Switch pin from LT to PWL */
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reg |= ASCONF_PWT_ENA;
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writew(reg, ASIC_CONF_REG);
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} else {
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/* Switch pin from PWT to BU */
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reg |= ~ASCONF_PWT_ENA;
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writew(reg, ASIC_CONF_REG);
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/* Disable pwt */
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writeb(0x00, PWT_REG(GCR_REG));
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}
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}
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void buzzer_volume(uint8_t level)
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{
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if (readw(ASIC_CONF_REG) & ASCONF_PWT_ENA) {
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if (level) {
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//scaling the volume as pwt only knows 0..63
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level = level >> 1;
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//if level > 0 buzzer is on
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level |= 0x01;
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}
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writeb(level,PWT_REG(VRC_REG));
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} else {
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/* we need to scale the buzz level, as the
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* ARMIO buzz controller only knows 0..63 */
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writeb(level>>2, BUZZ_LEVEL_REG);
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}
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}
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void buzzer_note(uint8_t note)
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{
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if ( (readw(ASIC_CONF_REG) & ASCONF_PWT_ENA) )
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writeb(note,PWT_REG(FRC_REG));
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}
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@ -0,0 +1,34 @@
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#ifndef _CAL_BUZZER_H
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#define _CAL_BUZZER_H
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#define NOTE(n,oct) (n<<2 | (oct & 0x03))
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#define NOTE_E 0x00
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#define NOTE_DIS 0x01
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#define NOTE_D 0x02
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#define NOTE_CIS 0x03
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#define NOTE_C 0x04
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#define NOTE_H 0x05
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#define NOTE_AIS 0x06
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#define NOTE_A 0x07
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#define NOTE_GIS 0x08
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#define NOTE_G 0x09
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#define NOTE_FIS 0x0A
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#define NOTE_F 0x0B
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#define OCTAVE_5 OCTAVE(0x00)
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#define OCTAVE_4 OCTAVE(0x01)
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#define OCTAVE_3 OCTAVE(0x02)
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#define OCTAVE_2 OCTAVE(0x03)
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#define OCTAVE_1 OCTAVE(0x04)
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#define OCTAVE(m) (m>NOTE_C?m+1:m)
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/* Switch buzzer to PWT mode (or back) */
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void buzzer_mode_pwt(int on);
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/* Set the buzzer level */
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void buzzer_volume(uint8_t level);
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/* Set the buzzer note */
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void buzzer_note(uint8_t note);
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#endif /* _CAL_BUZZER_H */
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