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Revision 030b655b062fe5190fc490e0091ea50307d7a86f authored by Risto Suominen on 25 August 2008, 06:04:23 UTC, committed by Takashi Iwai on 02 October 2008, 10:50:37 UTC 
ALSA: snd-powermac: HP detection for 1st iMac G3 SL
 
Correct headphone detection for 1st generation iMac G3 Slot-loading (Screamer).

This patch fixes the regression in the recent snd-powermac which
doesn't support some G3/G4 PowerMacs:
    http://lkml.org/lkml/2008/10/1/220

Signed-off-by: Risto Suominen <Risto.Suominen@gmail.com>
Tested-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
1 parent 4dbf95b
Raw File
mc6821.h 
#ifndef _MC6821_H_
#define _MC6821_H_

/*
 * This file describes the memery mapping of the MC6821 PIA.
 * The unions describe overlayed registers. Which of them is used is
 * determined by bit 2 of the corresponding control register.
 * this files expects the PIA_REG_PADWIDTH to be defined the numeric
 * value of the register spacing.
 *
 * Data came from MFC-31-Developer Kit (from Ralph Seidel,
 * zodiac@darkness.gun.de) and Motorola Data Sheet (from 
 * Richard Hirst, srh@gpt.co.uk)
 *
 * 6.11.95 copyright Joerg Dorchain (dorchain@mpi-sb.mpg.de)
 *
 */

#ifndef PIA_REG_PADWIDTH
#define PIA_REG_PADWIDTH 255
#endif

struct pia {
	union {
		volatile u_char pra;
		volatile u_char ddra;
	} ua;
	u_char pad1[PIA_REG_PADWIDTH];
	volatile u_char cra;
	u_char pad2[PIA_REG_PADWIDTH];
	union {
		volatile u_char prb;
		volatile u_char ddrb;
	} ub;
	u_char pad3[PIA_REG_PADWIDTH];
	volatile u_char crb;
	u_char pad4[PIA_REG_PADWIDTH];
};

#define ppra ua.pra
#define pddra ua.ddra
#define pprb ub.prb
#define pddrb ub.ddrb

#define PIA_C1_ENABLE_IRQ (1<<0)
#define PIA_C1_LOW_TO_HIGH (1<<1)
#define PIA_DDR (1<<2)
#define PIA_IRQ2 (1<<6)
#define PIA_IRQ1 (1<<7)

#endif
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