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Diffstat (limited to 'board/gen860t/beeper.c')
| -rw-r--r-- | board/gen860t/beeper.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/board/gen860t/beeper.c b/board/gen860t/beeper.c deleted file mode 100644 index 46fe66ba61..0000000000 --- a/board/gen860t/beeper.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * (C) Copyright 2002 - * Keith Outwater, keith_outwater@mvis.com - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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 <common.h> -#include <mpc8xx.h> -#include <asm/8xx_immap.h> -#include <linux/ctype.h> - -/* - * Basic beeper support for the GEN860T board. The GEN860T includes - * an audio sounder driven by a Phillips TDA8551 amplifier. The - * TDA8551 features a digital volume control which uses a "trinary" - * input (high/high-Z/low) to set volume. The 860's SPKROUT pin - * drives the amplifier input. - */ - - -/* - * Initialize beeper-related hardware. Initialize timer 1 for use with - * the beeper. Use 66 Mhz internal clock with prescale of 33 to get - * 1 uS period per count. - * FIXME: we should really compute the prescale based on the reported - * core clock frequency. - */ -void -init_beeper(void) -{ - volatile immap_t *immap = (immap_t *)CFG_IMMR; - - immap->im_cpmtimer.cpmt_tgcr &= ~TGCR_RST1 | TGCR_STP1; - immap->im_cpmtimer.cpmt_tmr1 = ((33 << TMR_PS_SHIFT) & TMR_PS_MSK) - | TMR_OM | TMR_FRR | TMR_ICLK_IN_GEN; - immap->im_cpmtimer.cpmt_tcn1 = 0; - immap->im_cpmtimer.cpmt_ter1 = 0xffff; - immap->im_cpmtimer.cpmt_tgcr |= TGCR_RST1; -} - - -/* - * Set beeper frequency. Max allowed frequency is 2.5 KHz. This limit - * is mostly arbitrary, but the beeper isn't really much good beyond this - * frequency. - */ -void -set_beeper_frequency(uint frequency) -{ -#define FREQ_LIMIT 2500 - - volatile immap_t *immap = (immap_t *)CFG_IMMR; - - /* - * Compute timer ticks given desired frequency. The timer is set up - * to count 0.5 uS per tick and it takes two ticks per cycle (Hz). - */ - if (frequency > FREQ_LIMIT) frequency = FREQ_LIMIT; - frequency = 1000000/frequency; - immap->im_cpmtimer.cpmt_trr1 = (ushort)frequency; -} - - -/* - * Turn the beeper on - */ -void -beeper_on(void) -{ - volatile immap_t *immap = (immap_t *)CFG_IMMR; - - immap->im_cpmtimer.cpmt_tgcr &= ~TGCR_STP1; -} - - -/* - * Turn the beeper off - */ -void -beeper_off(void) -{ - volatile immap_t *immap = (immap_t *)CFG_IMMR; - - immap->im_cpmtimer.cpmt_tgcr |= TGCR_STP1; -} - - -/* - * Increase or decrease the beeper volume. Volume can be set - * from off to full in 64 steps. To increase volume, the output - * pin is actively driven high, then returned to tristate. - * To decrease volume, output a low on the port pin (no need to - * change pin mode to tristate) then output a high to go back to - * tristate. - */ -void -set_beeper_volume(int steps) -{ - volatile immap_t *immap = (immap_t *)CFG_IMMR; - int i; - - if (steps >= 0) { - for (i = 0; i < (steps >= 64 ? 64 : steps); i++) { - immap->im_cpm.cp_pbodr &= ~(0x80000000 >> 19); - udelay(1); - immap->im_cpm.cp_pbodr |= (0x80000000 >> 19); - udelay(1); - } - } - else { - for (i = 0; i > (steps <= -64 ? -64 : steps); i--) { - immap->im_cpm.cp_pbdat &= ~(0x80000000 >> 19); - udelay(1); - immap->im_cpm.cp_pbdat |= (0x80000000 >> 19); - udelay(1); - } - } -} - - -/* - * Check the environment to see if the beeper needs beeping. - * Controlled by a sequence of the form: - * freq/delta volume/on time/off time;... where: - * freq = frequency in Hz (0 - 2500) - * delta volume = volume steps up or down (-64 <= vol <= 64) - * on time = time in mS - * off time = time in mS - * - * Return 1 on success, 0 on failure - */ -int -do_beeper(char *sequence) -{ -#define DELIMITER ';' - -int args[4]; -int i; -int val; -char *p = sequence; -char *tp; - - /* - * Parse the control sequence. This is a really simple parser - * without any real error checking. You can probably blow it - * up really easily. - */ - if (*p == '\0' || !isdigit(*p)) { - printf("%s:%d: null or invalid string (%s)\n", - __FILE__, __LINE__, p); - return 0; - } - - i = 0; - while (*p != '\0') { - while (*p != DELIMITER) { - if (i > 3) i = 0; - val = (int) simple_strtol(p, &tp, 0); - if (tp == p) { - printf("%s:%d: no digits or bad format\n", - __FILE__,__LINE__); - return 0; - } - else { - args[i] = val; - } - - i++; - if (*tp == DELIMITER) - p = tp; - else - p = ++tp; - } - p++; - - /* - * Well, we got something that has a chance of being correct - */ -#if 0 - for (i = 0; i < 4; i++) { - printf("%s:%d:arg %d = %d\n", __FILE__, __LINE__, i, args[i]); - } - printf("\n"); -#endif - - set_beeper_frequency(args[0]); - set_beeper_volume(args[1]); - beeper_on(); - udelay(1000 * args[2]); - beeper_off(); - udelay(1000 * args[3]); - } - return 1; -} - -/* vim: set ts=4 sw=4 tw=78: */ |