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author | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2016-03-11 20:22:28 -0800 |
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committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2016-04-19 18:34:18 +0200 |
commit | 86ddd732bd82b84724883b1f1579e18790611fe5 (patch) | |
tree | e52c4c88ceb7e14fd415031c56997d8c4054116e /src/drivers/pc80/pc/spkmodem.c | |
parent | 3812597c668b795d4fc85578021e501f2a56f6b9 (diff) | |
download | coreboot-86ddd732bd82b84724883b1f1579e18790611fe5.tar.xz |
kbuild: Allow drivers to fit src/drivers/[X]/[Y]/ scheme
Reorder drivers to fit src/drivers/[X]/[Y]/ scheme to make
them pluggable.
Also, fix up the following driver subdirectories by switching
to the src/drivers/[X]/[Y]/ scheme as these are hard requirements
for the main change:
* drivers/intel
* drivers/pc80
* drivers/dec
Change-Id: I455d3089a317181d5b99bf658df759ec728a5f6b
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/14047
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/drivers/pc80/pc/spkmodem.c')
-rw-r--r-- | src/drivers/pc80/pc/spkmodem.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/drivers/pc80/pc/spkmodem.c b/src/drivers/pc80/pc/spkmodem.c new file mode 100644 index 0000000000..df66f6fa62 --- /dev/null +++ b/src/drivers/pc80/pc/spkmodem.c @@ -0,0 +1,126 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Vladimir Serbinenko + * + * 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. + */ + +#include <console/console.h> +#include <arch/io.h> +#include <console/spkmodem.h> +#include <cpu/x86/tsc.h> + +#define SPEAKER_PIT_FREQUENCY 0x1234dd + + +enum { + PIT_COUNTER_0 = 0x40, + PIT_COUNTER_1 = 0x41, + PIT_COUNTER_2 = 0x42, + PIT_CTRL = 0x43, + PIT_SPEAKER_PORT = 0x61, +}; + + +enum { + PIT_SPK_TMR2 = 0x01, + PIT_SPK_DATA = 0x02, + PIT_SPK_TMR2_LATCH = 0x20 +}; + +enum { + PIT_CTRL_SELECT_MASK = 0xc0, + PIT_CTRL_SELECT_0 = 0x00, + PIT_CTRL_SELECT_1 = 0x40, + PIT_CTRL_SELECT_2 = 0x80, + + PIT_CTRL_READLOAD_MASK = 0x30, + PIT_CTRL_COUNTER_LATCH = 0x00, + PIT_CTRL_READLOAD_LSB = 0x10, + PIT_CTRL_READLOAD_MSB = 0x20, + PIT_CTRL_READLOAD_WORD = 0x30, + + PIT_CTRL_MODE_MASK = 0x0e, + PIT_CTRL_INTR_ON_TERM = 0x00, + PIT_CTRL_PROGR_ONE_SHOT = 0x02, + + PIT_CTRL_RATE_GEN = 0x04, + + PIT_CTRL_SQUAREWAVE_GEN = 0x06, + PIT_CTRL_SOFTSTROBE = 0x08, + + PIT_CTRL_HARDSTROBE = 0x0a, + + + PIT_CTRL_COUNT_MASK = 0x01, + PIT_CTRL_COUNT_BINARY = 0x00, + PIT_CTRL_COUNT_BCD = 0x01 +}; + + +static void +make_tone(uint16_t freq_count, unsigned int duration) +{ + outb(PIT_CTRL_SELECT_2 + | PIT_CTRL_READLOAD_WORD + | PIT_CTRL_SQUAREWAVE_GEN + | PIT_CTRL_COUNT_BINARY, PIT_CTRL); + + outb(freq_count & 0xff, PIT_COUNTER_2); + + outb((freq_count >> 8) & 0xff, PIT_COUNTER_2); + + outb(inb(PIT_SPEAKER_PORT) + | PIT_SPK_TMR2 | PIT_SPK_DATA, + PIT_SPEAKER_PORT); + + for (; duration; duration--) { + unsigned short counter, previous_counter = 0xffff; + + while (1) { + counter = inb(PIT_COUNTER_2); + counter |= ((uint16_t)inb(PIT_COUNTER_2)) << 8; + if (counter > previous_counter) { + previous_counter = counter; + break; + } + previous_counter = counter; + } + } +} + +void spkmodem_tx_byte(unsigned char c) +{ + int i; + + make_tone(SPEAKER_PIT_FREQUENCY / 200, 4); + for (i = 7; i >= 0; i--) { + if ((c >> i) & 1) + make_tone(SPEAKER_PIT_FREQUENCY / 2000, 20); + else + make_tone(SPEAKER_PIT_FREQUENCY / 4000, 40); + make_tone(SPEAKER_PIT_FREQUENCY / 1000, 10); + } + make_tone(SPEAKER_PIT_FREQUENCY / 200, 0); +} + +void spkmodem_init(void) +{ + /* Some cards need time to come online. + * Output some message to get it started. + */ + spkmodem_tx_byte('S'); + spkmodem_tx_byte('P'); + spkmodem_tx_byte('K'); + spkmodem_tx_byte('\r'); + spkmodem_tx_byte('\n'); +} |