diff options
Diffstat (limited to 'sound/pci/ice1712/ice1724.c')
| -rw-r--r-- | sound/pci/ice1712/ice1724.c | 95 |
1 files changed, 81 insertions, 14 deletions
diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c index 13ea94f317c..4490422fb93 100644 --- a/sound/pci/ice1712/ice1724.c +++ b/sound/pci/ice1712/ice1724.c @@ -223,6 +223,32 @@ static unsigned int snd_vt1724_get_gpio_data(struct snd_ice1712 *ice) } /* + * MPU401 accessor + */ +static unsigned char snd_vt1724_mpu401_read(struct snd_mpu401 *mpu, + unsigned long addr) +{ + /* fix status bits to the standard position */ + /* only RX_EMPTY and TX_FULL are checked */ + if (addr == MPU401C(mpu)) + return (inb(addr) & 0x0c) << 4; + else + return inb(addr); +} + +static void snd_vt1724_mpu401_write(struct snd_mpu401 *mpu, + unsigned char data, unsigned long addr) +{ + if (addr == MPU401C(mpu)) { + if (data == MPU401_ENTER_UART) + outb(0x01, addr); + /* what else? */ + } else + outb(data, addr); +} + + +/* * Interrupt handler */ @@ -230,24 +256,53 @@ static irqreturn_t snd_vt1724_interrupt(int irq, void *dev_id) { struct snd_ice1712 *ice = dev_id; unsigned char status; + unsigned char status_mask = + VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX | VT1724_IRQ_MTPCM; int handled = 0; +#ifdef CONFIG_SND_DEBUG + int timeout = 0; +#endif while (1) { status = inb(ICEREG1724(ice, IRQSTAT)); + status &= status_mask; if (status == 0) break; - +#ifdef CONFIG_SND_DEBUG + if (++timeout > 10) { + printk(KERN_ERR + "ice1724: Too long irq loop, status = 0x%x\n", + status); + break; + } +#endif handled = 1; - /* these should probably be separated at some point, - * but as we don't currently have MPU support on the board - * I will leave it - */ - if ((status & VT1724_IRQ_MPU_RX)||(status & VT1724_IRQ_MPU_TX)) { + if (status & VT1724_IRQ_MPU_TX) { if (ice->rmidi[0]) - snd_mpu401_uart_interrupt(irq, ice->rmidi[0]->private_data); - outb(status & (VT1724_IRQ_MPU_RX|VT1724_IRQ_MPU_TX), ICEREG1724(ice, IRQSTAT)); - status &= ~(VT1724_IRQ_MPU_RX|VT1724_IRQ_MPU_TX); + snd_mpu401_uart_interrupt_tx(irq, + ice->rmidi[0]->private_data); + else /* disable TX to be sure */ + outb(inb(ICEREG1724(ice, IRQMASK)) | + VT1724_IRQ_MPU_TX, + ICEREG1724(ice, IRQMASK)); + /* Due to mysterical reasons, MPU_TX is always + * generated (and can't be cleared) when a PCM + * playback is going. So let's ignore at the + * next loop. + */ + status_mask &= ~VT1724_IRQ_MPU_TX; + } + if (status & VT1724_IRQ_MPU_RX) { + if (ice->rmidi[0]) + snd_mpu401_uart_interrupt(irq, + ice->rmidi[0]->private_data); + else /* disable RX to be sure */ + outb(inb(ICEREG1724(ice, IRQMASK)) | + VT1724_IRQ_MPU_RX, + ICEREG1724(ice, IRQMASK)); } + /* ack MPU irq */ + outb(status, ICEREG1724(ice, IRQSTAT)); if (status & VT1724_IRQ_MTPCM) { /* * Multi-track PCM @@ -2236,10 +2291,7 @@ static int __devinit snd_vt1724_create(struct snd_card *card, } /* unmask used interrupts */ - if (! (ice->eeprom.data[ICE_EEP2_SYSCONF] & VT1724_CFG_MPU401)) - mask = VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX; - else - mask = 0; + mask = VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX; outb(mask, ICEREG1724(ice, IRQMASK)); /* don't handle FIFO overrun/underruns (just yet), * since they cause machine lockups @@ -2373,14 +2425,29 @@ static int __devinit snd_vt1724_probe(struct pci_dev *pci, if (! c->no_mpu401) { if (ice->eeprom.data[ICE_EEP2_SYSCONF] & VT1724_CFG_MPU401) { + struct snd_mpu401 *mpu; if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_ICE1712, ICEREG1724(ice, MPU_CTRL), - MPU401_INFO_INTEGRATED, + (MPU401_INFO_INTEGRATED | + MPU401_INFO_TX_IRQ), ice->irq, 0, &ice->rmidi[0])) < 0) { snd_card_free(card); return err; } + mpu = ice->rmidi[0]->private_data; + mpu->read = snd_vt1724_mpu401_read; + mpu->write = snd_vt1724_mpu401_write; + /* unmask MPU RX/TX irqs */ + outb(inb(ICEREG1724(ice, IRQMASK)) & + ~(VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX), + ICEREG1724(ice, IRQMASK)); +#if 0 /* for testing */ + /* set watermarks */ + outb(VT1724_MPU_RX_FIFO | 0x1, + ICEREG1724(ice, MPU_FIFO_WM)); + outb(0x1, ICEREG1724(ice, MPU_FIFO_WM)); +#endif } } |