diff options
| author | Oswald Buddenhagen <oswald.buddenhagen@gmx.de> | 2023-05-26 12:16:58 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-06-05 09:26:26 +0200 |
| commit | 6ab13291ba82e6f0c8778cb45726dffffb9205f5 (patch) | |
| tree | d69d9a8a1498502eea0b097cdc423c9a00e28a48 /sound/pci/emu10k1/io.c | |
| parent | ad326d4a1364f9d677204b1e005ee8eb2a0b6558 (diff) | |
ALSA: emu10k1: make E-MU FPGA register dump in /proc more useful
Include the routing information, which can be actually read back.
Somewhat as a drive-by, make the register dump format less obscure - the
previous one made no sense at all.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230526101659.437969-6-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/emu10k1/io.c')
| -rw-r--r-- | sound/pci/emu10k1/io.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c index 9a839e7d283f..abe69ae40499 100644 --- a/sound/pci/emu10k1/io.c +++ b/sound/pci/emu10k1/io.c @@ -298,21 +298,27 @@ void snd_emu1010_fpga_write(struct snd_emu10k1 *emu, u32 reg, u32 value) spin_unlock_irqrestore(&emu->emu_lock, flags); } -void snd_emu1010_fpga_read(struct snd_emu10k1 *emu, u32 reg, u32 *value) +static void snd_emu1010_fpga_read_locked(struct snd_emu10k1 *emu, u32 reg, u32 *value) { // The higest input pin is used as the designated interrupt trigger, // so it needs to be masked out. u32 mask = emu->card_capabilities->ca0108_chip ? 0x1f : 0x7f; - unsigned long flags; if (snd_BUG_ON(reg > 0x3f)) return; reg += 0x40; /* 0x40 upwards are registers. */ - spin_lock_irqsave(&emu->emu_lock, flags); outw(reg, emu->port + A_GPIO); udelay(10); outw(reg | 0x80, emu->port + A_GPIO); /* High bit clocks the value into the fpga. */ udelay(10); *value = ((inw(emu->port + A_GPIO) >> 8) & mask); +} + +void snd_emu1010_fpga_read(struct snd_emu10k1 *emu, u32 reg, u32 *value) +{ + unsigned long flags; + + spin_lock_irqsave(&emu->emu_lock, flags); + snd_emu1010_fpga_read_locked(emu, reg, value); spin_unlock_irqrestore(&emu->emu_lock, flags); } @@ -335,6 +341,22 @@ void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 s spin_unlock_irqrestore(&emu->emu_lock, flags); } +u32 snd_emu1010_fpga_link_dst_src_read(struct snd_emu10k1 *emu, u32 dst) +{ + unsigned long flags; + u32 hi, lo; + + if (snd_BUG_ON(dst & ~0x71f)) + return 0; + spin_lock_irqsave(&emu->emu_lock, flags); + snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTHI, dst >> 8); + snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTLO, dst & 0x1f); + snd_emu1010_fpga_read_locked(emu, EMU_HANA_SRCHI, &hi); + snd_emu1010_fpga_read_locked(emu, EMU_HANA_SRCLO, &lo); + spin_unlock_irqrestore(&emu->emu_lock, flags); + return (hi << 8) | lo; +} + void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb) { unsigned long flags; |