heathrow.h

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/*
 * heathrow.h: definitions for using the "Heathrow" I/O controller chip.
 *
 * Grabbed from Open Firmware definitions on a PowerBook G3 Series
 *
 * Copyright (C) 1997 Paul Mackerras.
 */

/* offset from ohare base for feature control register */
#define HEATHROW_FEATURE_REG	0x38

/*
 * Bits in feature control register.
 * Bits postfixed with a _N are in inverse logic
 */
#define HRW_RESET_SCC		0x00000001	/* Named in_use_led in OF ??? */
#define HRW_BAY_POWER_N		0x00000002
#define HRW_BAY_PCI_ENABLE	0x00000004
#define HRW_BAY_IDE_ENABLE	0x00000008
#define HRW_BAY_FLOPPY_ENABLE	0x00000010
#define HRW_IDE0_ENABLE		0x00000020
#define HRW_IDE0_RESET_N	0x00000040
#define HRW_BAY_RESET_N		0x00000080
#define HRW_IOBUS_ENABLE	0x00000100	/* Internal IDE ? */
#define HRW_SCC_ENABLE		0x00000200
#define HRW_MESH_ENABLE		0x00000400
#define HRW_SWIM_ENABLE		0x00000800
#define HRW_SOUND_POWER_N	0x00001000
#define HRW_SOUND_CLK_ENABLE	0x00002000
#define HRW_SCCA_IO		0x00004000
#define HRW_SCCB_IO		0x00008000
#define HRW_PORT_OR_DESK_VIA_N	0x00010000	/* This one is 0 on PowerBook */
#define HRW_PWM_MON_ID_N	0x00020000	/* ??? (0) */
#define HRW_HOOK_MB_CNT_N	0x00040000	/* ??? (0) */
#define HRW_SWIM_CLONE_FLOPPY	0x00080000	/* ??? (0) */
#define HRW_AUD_RUN22		0x00100000	/* ??? (1) */
#define HRW_SCSI_LINK_MODE	0x00200000	/* Read ??? (1) */
#define HRW_ARB_BYPASS		0x00400000	/* ??? (0 on main, 1 on gatwick) */
#define HRW_IDE1_RESET_N	0x00800000	/* Media bay */
#define HRW_SLOW_SCC_PCLK	0x01000000	/* ??? (0) */
#define HRW_MODEM_POWER_N	0x02000000	/* Used by internal modem on wallstreet */
#define HRW_MFDC_CELL_ENABLE	0x04000000	/* ??? (0) */
#define HRW_USE_MFDC		0x08000000	/* ??? (0) */
#define HRW_BMAC_IO_ENABLE	0x60000000	/* two bits, not documented in OF */
#define HRW_BMAC_RESET		0x80000000	/* not documented in OF */

/* We OR those features at boot on desktop G3s */
#define HRW_DEFAULTS		(HRW_SCCA_IO | HRW_SCCB_IO | HRW_SCC_ENABLE)

/* Those seem to be different on paddington */
#define PADD_MODEM_POWER_N	0x00000001	/* modem power on paddington */
#define PADD_RESET_SCC		0x02000000	/* check this please */