diff options
-rw-r--r-- | Makefile.target | 1 | ||||
-rwxr-xr-x | configure | 3 | ||||
-rw-r--r-- | hw/milkymist-ac97.c | 335 | ||||
-rw-r--r-- | trace-events | 12 |
4 files changed, 351 insertions, 0 deletions
diff --git a/Makefile.target b/Makefile.target index 04e20dd..0610bb8 100644 --- a/Makefile.target +++ b/Makefile.target @@ -267,6 +267,7 @@ obj-lm32-y += lm32_juart.o obj-lm32-y += lm32_timer.o obj-lm32-y += lm32_uart.o obj-lm32-y += lm32_sys.o +obj-lm32-y += milkymist-ac97.o obj-mips-y = mips_r4k.o mips_jazz.o mips_malta.o mips_mipssim.o obj-mips-y += mips_addr.o mips_timer.o mips_int.o @@ -3350,6 +3350,9 @@ if test "$target_softmmu" = "yes" ; then arm) cflags="-DHAS_AUDIO $cflags" ;; + lm32) + cflags="-DHAS_AUDIO $cflags" + ;; i386|mips|ppc) cflags="-DHAS_AUDIO -DHAS_AUDIO_CHOICE $cflags" ;; diff --git a/hw/milkymist-ac97.c b/hw/milkymist-ac97.c new file mode 100644 index 0000000..6c9e318 --- /dev/null +++ b/hw/milkymist-ac97.c @@ -0,0 +1,335 @@ +/* + * QEMU model of the Milkymist System Controller. + * + * Copyright (c) 2010 Michael Walle <michael@walle.cc> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + * + * + * Specification available at: + * http://www.milkymist.org/socdoc/ac97.pdf + */ + +#include "hw.h" +#include "sysbus.h" +#include "trace.h" +#include "audio/audio.h" +#include "qemu-error.h" + +enum { + R_AC97_CTRL = 0, + R_AC97_ADDR, + R_AC97_DATAOUT, + R_AC97_DATAIN, + R_D_CTRL, + R_D_ADDR, + R_D_REMAINING, + R_RESERVED, + R_U_CTRL, + R_U_ADDR, + R_U_REMAINING, + R_MAX +}; + +enum { + AC97_CTRL_RQEN = (1<<0), + AC97_CTRL_WRITE = (1<<1), +}; + +enum { + CTRL_EN = (1<<0), +}; + +struct MilkymistAC97State { + SysBusDevice busdev; + + QEMUSoundCard card; + SWVoiceIn *voice_in; + SWVoiceOut *voice_out; + + uint32_t regs[R_MAX]; + + qemu_irq crrequest_irq; + qemu_irq crreply_irq; + qemu_irq dmar_irq; + qemu_irq dmaw_irq; +}; +typedef struct MilkymistAC97State MilkymistAC97State; + +static void update_voices(MilkymistAC97State *s) +{ + if (s->regs[R_D_CTRL] & CTRL_EN) { + AUD_set_active_out(s->voice_out, 1); + } else { + AUD_set_active_out(s->voice_out, 0); + } + + if (s->regs[R_U_CTRL] & CTRL_EN) { + AUD_set_active_in(s->voice_in, 1); + } else { + AUD_set_active_in(s->voice_in, 0); + } +} + +static uint32_t ac97_read(void *opaque, target_phys_addr_t addr) +{ + MilkymistAC97State *s = opaque; + uint32_t r = 0; + + addr >>= 2; + switch (addr) { + case R_AC97_CTRL: + case R_AC97_ADDR: + case R_AC97_DATAOUT: + case R_AC97_DATAIN: + case R_D_CTRL: + case R_D_ADDR: + case R_D_REMAINING: + case R_U_CTRL: + case R_U_ADDR: + case R_U_REMAINING: + r = s->regs[addr]; + break; + + default: + error_report("milkymist_ac97: read access to unkown register 0x" + TARGET_FMT_plx, addr << 2); + break; + } + + trace_milkymist_ac97_memory_read(addr << 2, r); + + return r; +} + +static void ac97_write(void *opaque, target_phys_addr_t addr, uint32_t value) +{ + MilkymistAC97State *s = opaque; + + trace_milkymist_ac97_memory_write(addr, value); + + addr >>= 2; + switch (addr) { + case R_AC97_CTRL: + /* always raise an IRQ according to the direction */ + if (value & AC97_CTRL_RQEN) { + if (value & AC97_CTRL_WRITE) { + trace_milkymist_ac97_pulse_irq_crrequest(); + qemu_irq_pulse(s->crrequest_irq); + } else { + trace_milkymist_ac97_pulse_irq_crreply(); + qemu_irq_pulse(s->crreply_irq); + } + } + + /* RQEN is self clearing */ + s->regs[addr] = value & ~AC97_CTRL_RQEN; + break; + case R_D_CTRL: + case R_U_CTRL: + s->regs[addr] = value; + update_voices(s); + break; + case R_AC97_ADDR: + case R_AC97_DATAOUT: + case R_AC97_DATAIN: + case R_D_ADDR: + case R_D_REMAINING: + case R_U_ADDR: + case R_U_REMAINING: + s->regs[addr] = value; + break; + + default: + error_report("milkymist_ac97: write access to unkown register 0x" + TARGET_FMT_plx, addr); + break; + } + +} + +static CPUReadMemoryFunc * const ac97_read_fn[] = { + NULL, + NULL, + &ac97_read, +}; + +static CPUWriteMemoryFunc * const ac97_write_fn[] = { + NULL, + NULL, + &ac97_write, +}; + +static void ac97_in_cb(void *opaque, int avail_b) +{ + MilkymistAC97State *s = opaque; + uint8_t buf[4096]; + uint32_t remaining = s->regs[R_U_REMAINING]; + int temp = audio_MIN(remaining, avail_b); + uint32_t addr = s->regs[R_U_ADDR]; + int transferred = 0; + + trace_milkymist_ac97_in_cb(avail_b, remaining); + + /* prevent from raising an IRQ */ + if (temp == 0) { + return; + } + + while (temp) { + int acquired, to_copy; + + to_copy = audio_MIN(temp, sizeof(buf)); + acquired = AUD_read(s->voice_in, buf, to_copy); + if (!acquired) { + break; + } + + cpu_physical_memory_write(addr, buf, acquired); + + temp -= acquired; + addr += acquired; + transferred += acquired; + } + + trace_milkymist_ac97_in_cb_transferred(transferred); + + s->regs[R_U_ADDR] = addr; + s->regs[R_U_REMAINING] -= transferred; + + if ((s->regs[R_U_CTRL] & CTRL_EN) && (s->regs[R_U_REMAINING] == 0)) { + trace_milkymist_ac97_pulse_irq_dmaw(); + qemu_irq_pulse(s->dmaw_irq); + } +} + +static void ac97_out_cb(void *opaque, int free_b) +{ + MilkymistAC97State *s = opaque; + uint8_t buf[4096]; + uint32_t remaining = s->regs[R_D_REMAINING]; + int temp = audio_MIN(remaining, free_b); + uint32_t addr = s->regs[R_D_ADDR]; + int transferred = 0; + + trace_milkymist_ac97_out_cb(free_b, remaining); + + /* prevent from raising an IRQ */ + if (temp == 0) { + return; + } + + while (temp) { + int copied, to_copy; + + to_copy = audio_MIN(temp, sizeof(buf)); + cpu_physical_memory_read(addr, buf, to_copy); + copied = AUD_write(s->voice_out, buf, to_copy); + if (!copied) { + break; + } + temp -= copied; + addr += copied; + transferred += copied; + } + + trace_milkymist_ac97_out_cb_transferred(transferred); + + s->regs[R_D_ADDR] = addr; + s->regs[R_D_REMAINING] -= transferred; + + if ((s->regs[R_D_CTRL] & CTRL_EN) && (s->regs[R_D_REMAINING] == 0)) { + trace_milkymist_ac97_pulse_irq_dmar(); + qemu_irq_pulse(s->dmar_irq); + } +} + +static void milkymist_ac97_reset(DeviceState *d) +{ + MilkymistAC97State *s = container_of(d, MilkymistAC97State, busdev.qdev); + int i; + + for (i = 0; i < R_MAX; i++) { + s->regs[i] = 0; + } + + AUD_set_active_in(s->voice_in, 0); + AUD_set_active_out(s->voice_out, 0); +} + +static int ac97_post_load(void *opaque, int version_id) +{ + MilkymistAC97State *s = opaque; + + update_voices(s); + + return 0; +} + +static int milkymist_ac97_init(SysBusDevice *dev) +{ + MilkymistAC97State *s = FROM_SYSBUS(typeof(*s), dev); + int ac97_regs; + + struct audsettings as; + sysbus_init_irq(dev, &s->crrequest_irq); + sysbus_init_irq(dev, &s->crreply_irq); + sysbus_init_irq(dev, &s->dmar_irq); + sysbus_init_irq(dev, &s->dmaw_irq); + + AUD_register_card("Milkymist AC'97", &s->card); + + as.freq = 48000; + as.nchannels = 2; + as.fmt = AUD_FMT_S16; + as.endianness = 1; + + s->voice_in = AUD_open_in(&s->card, s->voice_in, + "mm_ac97.in", s, ac97_in_cb, &as); + s->voice_out = AUD_open_out(&s->card, s->voice_out, + "mm_ac97.out", s, ac97_out_cb, &as); + + ac97_regs = cpu_register_io_memory(ac97_read_fn, ac97_write_fn, s, + DEVICE_NATIVE_ENDIAN); + sysbus_init_mmio(dev, R_MAX * 4, ac97_regs); + + return 0; +} + +static const VMStateDescription vmstate_milkymist_ac97 = { + .name = "milkymist-ac97", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .post_load = ac97_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT32_ARRAY(regs, MilkymistAC97State, R_MAX), + VMSTATE_END_OF_LIST() + } +}; + +static SysBusDeviceInfo milkymist_ac97_info = { + .init = milkymist_ac97_init, + .qdev.name = "milkymist-ac97", + .qdev.size = sizeof(MilkymistAC97State), + .qdev.vmsd = &vmstate_milkymist_ac97, + .qdev.reset = milkymist_ac97_reset, +}; + +static void milkymist_ac97_register(void) +{ + sysbus_register_withprop(&milkymist_ac97_info); +} + +device_init(milkymist_ac97_register) diff --git a/trace-events b/trace-events index 90c9e0b..fc8caa8 100644 --- a/trace-events +++ b/trace-events @@ -286,3 +286,15 @@ disable lm32_uart_irq_state(int level) "irq state %d" # hw/lm32_sys.c disable lm32_sys_memory_write(uint32_t addr, uint32_t value) "addr 0x%08x value 0x%08x" + +# hw/milkymist-ac97.c +disable milkymist_ac97_memory_read(uint32_t addr, uint32_t value) "addr %08x value %08x" +disable milkymist_ac97_memory_write(uint32_t addr, uint32_t value) "addr %08x value %08x" +disable milkymist_ac97_pulse_irq_crrequest(void) "Pulse IRQ CR request" +disable milkymist_ac97_pulse_irq_crreply(void) "Pulse IRQ CR reply" +disable milkymist_ac97_pulse_irq_dmaw(void) "Pulse IRQ DMA write" +disable milkymist_ac97_pulse_irq_dmar(void) "Pulse IRQ DMA read" +disable milkymist_ac97_in_cb(int avail, uint32_t remaining) "avail %d remaining %u" +disable milkymist_ac97_in_cb_transferred(int transferred) "transferred %d" +disable milkymist_ac97_out_cb(int free, uint32_t remaining) "free %d remaining %u" +disable milkymist_ac97_out_cb_transferred(int transferred) "transferred %d" |