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Diffstat (limited to 'sound/pcmcia/pdaudiocf/pdaudiocf_irq.c')
-rw-r--r--sound/pcmcia/pdaudiocf/pdaudiocf_irq.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/sound/pcmcia/pdaudiocf/pdaudiocf_irq.c b/sound/pcmcia/pdaudiocf/pdaudiocf_irq.c
new file mode 100644
index 000000000..f134b4a46
--- /dev/null
+++ b/sound/pcmcia/pdaudiocf/pdaudiocf_irq.c
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Sound Core PDAudioCF soundcard
+ *
+ * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <sound/core.h>
+#include "pdaudiocf.h"
+#include <sound/initval.h>
+#include <asm/irq_regs.h>
+
+/*
+ *
+ */
+irqreturn_t pdacf_interrupt(int irq, void *dev)
+{
+ struct snd_pdacf *chip = dev;
+ unsigned short stat;
+ bool wake_thread = false;
+
+ if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|
+ PDAUDIOCF_STAT_IS_CONFIGURED|
+ PDAUDIOCF_STAT_IS_SUSPENDED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
+ return IRQ_HANDLED; /* IRQ_NONE here? */
+
+ stat = inw(chip->port + PDAUDIOCF_REG_ISR);
+ if (stat & (PDAUDIOCF_IRQLVL|PDAUDIOCF_IRQOVR)) {
+ if (stat & PDAUDIOCF_IRQOVR) /* should never happen */
+ snd_printk(KERN_ERR "PDAUDIOCF SRAM buffer overrun detected!\n");
+ if (chip->pcm_substream)
+ wake_thread = true;
+ if (!(stat & PDAUDIOCF_IRQAKM))
+ stat |= PDAUDIOCF_IRQAKM; /* check rate */
+ }
+ if (get_irq_regs() != NULL)
+ snd_ak4117_check_rate_and_errors(chip->ak4117, 0);
+ return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED;
+}
+
+static inline void pdacf_transfer_mono16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+ while (size-- > 0) {
+ *dst++ = inw(rdp_port) ^ xor;
+ inw(rdp_port);
+ }
+}
+
+static inline void pdacf_transfer_mono32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ inw(rdp_port);
+ *dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+ }
+}
+
+static inline void pdacf_transfer_stereo16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+ while (size-- > 0) {
+ *dst++ = inw(rdp_port) ^ xor;
+ *dst++ = inw(rdp_port) ^ xor;
+ }
+}
+
+static inline void pdacf_transfer_stereo32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2, val3;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ val3 = inw(rdp_port);
+ *dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+ *dst++ = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
+ }
+}
+
+static inline void pdacf_transfer_mono16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+ while (size-- > 0) {
+ *dst++ = swab16(inw(rdp_port) ^ xor);
+ inw(rdp_port);
+ }
+}
+
+static inline void pdacf_transfer_mono32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ inw(rdp_port);
+ *dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
+ }
+}
+
+static inline void pdacf_transfer_stereo16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+ while (size-- > 0) {
+ *dst++ = swab16(inw(rdp_port) ^ xor);
+ *dst++ = swab16(inw(rdp_port) ^ xor);
+ }
+}
+
+static inline void pdacf_transfer_stereo32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2, val3;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ val3 = inw(rdp_port);
+ *dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
+ *dst++ = swab32((((u32)val3 << 16) | (val2 & 0xff00)) ^ xor);
+ }
+}
+
+static inline void pdacf_transfer_mono24le(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2;
+ register u32 xval1;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ inw(rdp_port);
+ xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
+ *dst++ = (u8)(xval1 >> 8);
+ *dst++ = (u8)(xval1 >> 16);
+ *dst++ = (u8)(xval1 >> 24);
+ }
+}
+
+static inline void pdacf_transfer_mono24be(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2;
+ register u32 xval1;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ inw(rdp_port);
+ xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
+ *dst++ = (u8)(xval1 >> 24);
+ *dst++ = (u8)(xval1 >> 16);
+ *dst++ = (u8)(xval1 >> 8);
+ }
+}
+
+static inline void pdacf_transfer_stereo24le(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2, val3;
+ register u32 xval1, xval2;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ val3 = inw(rdp_port);
+ xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+ xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
+ *dst++ = (u8)(xval1 >> 8);
+ *dst++ = (u8)(xval1 >> 16);
+ *dst++ = (u8)(xval1 >> 24);
+ *dst++ = (u8)(xval2 >> 8);
+ *dst++ = (u8)(xval2 >> 16);
+ *dst++ = (u8)(xval2 >> 24);
+ }
+}
+
+static inline void pdacf_transfer_stereo24be(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+ register u16 val1, val2, val3;
+ register u32 xval1, xval2;
+
+ while (size-- > 0) {
+ val1 = inw(rdp_port);
+ val2 = inw(rdp_port);
+ val3 = inw(rdp_port);
+ xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+ xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
+ *dst++ = (u8)(xval1 >> 24);
+ *dst++ = (u8)(xval1 >> 16);
+ *dst++ = (u8)(xval1 >> 8);
+ *dst++ = (u8)(xval2 >> 24);
+ *dst++ = (u8)(xval2 >> 16);
+ *dst++ = (u8)(xval2 >> 8);
+ }
+}
+
+static void pdacf_transfer(struct snd_pdacf *chip, unsigned int size, unsigned int off)
+{
+ unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
+ unsigned int xor = chip->pcm_xor;
+
+ if (chip->pcm_sample == 3) {
+ if (chip->pcm_little) {
+ if (chip->pcm_channels == 1) {
+ pdacf_transfer_mono24le((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
+ } else {
+ pdacf_transfer_stereo24le((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
+ }
+ } else {
+ if (chip->pcm_channels == 1) {
+ pdacf_transfer_mono24be((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
+ } else {
+ pdacf_transfer_stereo24be((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
+ }
+ }
+ return;
+ }
+ if (chip->pcm_swab == 0) {
+ if (chip->pcm_channels == 1) {
+ if (chip->pcm_frame == 2) {
+ pdacf_transfer_mono16((u16 *)chip->pcm_area + off, xor, size, rdp_port);
+ } else {
+ pdacf_transfer_mono32((u32 *)chip->pcm_area + off, xor, size, rdp_port);
+ }
+ } else {
+ if (chip->pcm_frame == 2) {
+ pdacf_transfer_stereo16((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+ } else {
+ pdacf_transfer_stereo32((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+ }
+ }
+ } else {
+ if (chip->pcm_channels == 1) {
+ if (chip->pcm_frame == 2) {
+ pdacf_transfer_mono16sw((u16 *)chip->pcm_area + off, xor, size, rdp_port);
+ } else {
+ pdacf_transfer_mono32sw((u32 *)chip->pcm_area + off, xor, size, rdp_port);
+ }
+ } else {
+ if (chip->pcm_frame == 2) {
+ pdacf_transfer_stereo16sw((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+ } else {
+ pdacf_transfer_stereo32sw((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+ }
+ }
+ }
+}
+
+irqreturn_t pdacf_threaded_irq(int irq, void *dev)
+{
+ struct snd_pdacf *chip = dev;
+ int size, off, cont, rdp, wdp;
+
+ if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|PDAUDIOCF_STAT_IS_CONFIGURED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
+ return IRQ_HANDLED;
+
+ if (chip->pcm_substream == NULL || chip->pcm_substream->runtime == NULL || !snd_pcm_running(chip->pcm_substream))
+ return IRQ_HANDLED;
+
+ rdp = inw(chip->port + PDAUDIOCF_REG_RDP);
+ wdp = inw(chip->port + PDAUDIOCF_REG_WDP);
+ /* printk(KERN_DEBUG "TASKLET: rdp = %x, wdp = %x\n", rdp, wdp); */
+ size = wdp - rdp;
+ if (size < 0)
+ size += 0x10000;
+ if (size == 0)
+ size = 0x10000;
+ size /= chip->pcm_frame;
+ if (size > 64)
+ size -= 32;
+
+#if 0
+ chip->pcm_hwptr += size;
+ chip->pcm_hwptr %= chip->pcm_size;
+ chip->pcm_tdone += size;
+ if (chip->pcm_frame == 2) {
+ unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
+ while (size-- > 0) {
+ inw(rdp_port);
+ inw(rdp_port);
+ }
+ } else {
+ unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
+ while (size-- > 0) {
+ inw(rdp_port);
+ inw(rdp_port);
+ inw(rdp_port);
+ }
+ }
+#else
+ off = chip->pcm_hwptr + chip->pcm_tdone;
+ off %= chip->pcm_size;
+ chip->pcm_tdone += size;
+ while (size > 0) {
+ cont = chip->pcm_size - off;
+ if (cont > size)
+ cont = size;
+ pdacf_transfer(chip, cont, off);
+ off += cont;
+ off %= chip->pcm_size;
+ size -= cont;
+ }
+#endif
+ mutex_lock(&chip->reg_lock);
+ while (chip->pcm_tdone >= chip->pcm_period) {
+ chip->pcm_hwptr += chip->pcm_period;
+ chip->pcm_hwptr %= chip->pcm_size;
+ chip->pcm_tdone -= chip->pcm_period;
+ mutex_unlock(&chip->reg_lock);
+ snd_pcm_period_elapsed(chip->pcm_substream);
+ mutex_lock(&chip->reg_lock);
+ }
+ mutex_unlock(&chip->reg_lock);
+ return IRQ_HANDLED;
+}
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