Messages in this thread Patch in this message | | | Date | Sat, 9 Jun 2001 20:16:05 +0200 | From | Lukas Schroeder <> | Subject | Re: [patch] ess maestro, support for hardware volume control |
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> > By giving hwv=0 to insmod one can explicitly disable it. Setting > > can we have a better name like 'hwvol_enable'? > > > + set_mixer(c, 0, val); > > careful. you just used the indirect ac97 registers without holding the > card's lock.. if another processor does a mixer ioctl while this is > happening you'll get weird behaviour. > > Fix the locking (and the obscure parameter name? :)) and it looks
below is the version with the suggested fixes, and with s/hwv/hwvol/ for hwv_input also.
regards, lukas
--- linux-2.4.6-pre2/drivers/sound/maestro.c Sat Jun 9 16:55:22 2001 +++ linux/drivers/sound/maestro.c Sat Jun 9 19:48:34 2001 @@ -115,6 +115,10 @@ * themselves, but we'll see. * * History + * v0.15 - Jun 09 2001 - Lukas Schroeder <lukas@edeal.de> + * enable hardware volume control (by default) + * add hwvol_enable= to allow disabling of HWV (values are 0 or 1) + * add hwvol_input= to allow selecting the HWV input pins (values are 0 or 1) * (still kind of v0.14) Nov 23 - Alan Cox <alan@redhat.com> * Add clocking= for people with seriously warped hardware * (still v0.14) Nov 10 2000 - Bartlomiej Zolnierkiewicz <bkz@linux-ide.org> @@ -269,8 +273,13 @@ static int clocking=48000; +/* enable hardware volume control? */ +static int hwvol_enable = 1; +/* hardware volume input pin selection */ +static int hwvol_input = 0; + /* --------------------------------------------------------------------- */ -#define DRIVER_VERSION "0.14" +#define DRIVER_VERSION "0.15" #ifndef PCI_VENDOR_ESS #define PCI_VENDOR_ESS 0x125D @@ -312,6 +321,9 @@ #define NR_APUS 64 #define NR_APU_REGS 16 +/* steps per hardware volume count */ +#define HWV_MIXER_STEP 15 + /* acpi states */ enum { ACPI_D0=0, @@ -514,6 +526,7 @@ /* --------------------------------------------------------------------- */ +static void set_mixer(struct ess_card *card,unsigned int mixer, unsigned int val ) ; static void check_suspend(struct ess_card *card); static struct ess_card *devs = NULL; @@ -1898,10 +1911,20 @@ if(event&(1<<6)) { - /* XXX if we have a hw volume control int enable - all the ints? doesn't make sense.. */ + unsigned int val; + event = inw(c->iobase+0x18); - outb(0xFF, c->iobase+0x1A); + outb((1<<6), c->iobase+0x1A); + + /* read the HW Master Volume Counter + Bits 7:5 Master Volume Left + Bits 3:1 Master Volume Right + */ + i = inb(c->iobase+0x1f); + val = ((HWV_MIXER_STEP * ((i>>1) & 7)) << 8) | HWV_MIXER_STEP * ((i>>5) & 7); + spin_lock(&s->lock); + set_mixer(c, 0, val); + spin_unlock(&s->lock); } else { @@ -3088,8 +3111,10 @@ w&=~(1<<14); /* External clock */ w&=~(1<<7); /* HWV off */ + if (hwvol_enable) w|=(1<<7); w&=~(1<<6); /* Debounce off */ - w&=~(1<<5); /* GPIO 4:5 */ + w&=~(1<<5); /* GPIO 4:5 ; HVI pin selection */ + if (hwvol_input) w|=(1<<5); w|= (1<<4); /* Disconnect from the CHI. Enabling this made a dell 7500 work. */ w&=~(1<<2); /* MIDI fix off (undoc) */ w&=~(1<<1); /* reserved, always write 0 */ @@ -3170,7 +3195,8 @@ outw(w, iobase+0x18); w=inw(iobase+0x18); - w&=~(1<<6); /* Harpo off */ + w&=~(1<<6); /* HWV irq off */ + if (hwvol_enable) w|=(1<<6); outw(w, iobase+0x18); w=inw(iobase+0x18); @@ -3487,6 +3513,7 @@ /* now go to sleep 'till something interesting happens */ maestro_power(card,ACPI_D2); + printk(KERN_INFO "maestro: hardware volume control %senabled\n", (hwvol_enable) ? "" : "not "); printk(KERN_INFO "maestro: %d channels configured.\n", num); return 1; } @@ -3593,6 +3620,10 @@ MODULE_PARM(dsps_order,"i"); MODULE_PARM(use_pm,"i"); MODULE_PARM(clocking, "i"); + +MODULE_PARM(hwvol_enable, "i"); +MODULE_PARM(hwvol_input, "i"); + void cleanup_module(void) { M_printk("maestro: unloading\n"); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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