/*
* HP i8042 System Device Controller -- header
*
* Copyright (c) 2001 Brian S. Julin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL").
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
*
* References:
*
* HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A
*
* System Device Controller Microprocessor Firmware Theory of Operation
* for Part Number 1820-4784 Revision B. Dwg No. A-1820-4784-2
*
*/
#ifndef _LINUX_HP_SDC_H
#define _LINUX_HP_SDC_H
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/time.h>
#include <linux/timer.h>
#if defined(__hppa__)
#include <asm/hardware.h>
#endif
/* No 4X status reads take longer than this (in usec).
*/
#define HP_SDC_MAX_REG_DELAY 20000
typedef void (hp_sdc_irqhook) (int irq, void *dev_id,
uint8_t status, uint8_t data);
int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback);
int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback);
int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback);
int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback);
int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback);
int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback);
typedef struct {
int actidx; /* Start of act. Acts are atomic WRT I/O to SDC */
int idx; /* Index within the act */
int endidx; /* transaction is over and done if idx == endidx */
uint8_t *seq; /* commands/data for the transaction */
union {
hp_sdc_irqhook *irqhook; /* Callback, isr or tasklet context */
struct semaphore *semaphore; /* Semaphore to sleep on. */
} act;
} hp_sdc_transaction;
int hp_sdc_enqueue_transaction(hp_sdc_transaction *this);
int hp_sdc_dequeue_transaction(hp_sdc_transaction *this);
/* The HP_SDC_ACT* values are peculiar to this driver.
* Nuance: never HP_SDC_ACT_DATAIN | HP_SDC_ACT_DEALLOC, use another
* act to perform the dealloc.
*/
#define HP_SDC_ACT_PRECMD 0x01 /* Send a command first */
#define HP_SDC_ACT_DATAREG 0x02 /* Set data registers */
#define HP_SDC_ACT_DATAOUT 0x04 /* Send data bytes */
#define HP_SDC_ACT_POSTCMD 0x08 /* Send command after */
#define HP_SDC_ACT_DATAIN 0x10 /* Collect data after */
#define HP_SDC_ACT_DURING 0x1f
#define HP_SDC_ACT_SEMAPHORE 0x20 /* Raise semaphore after */
#define HP_SDC_ACT_CALLBACK 0x40 /* Pass data to IRQ handler */
#define HP_SDC_ACT_DEALLOC 0x80 /* Destroy transaction after */
#define HP_SDC_ACT_AFTER 0xe0
#define HP_SDC_ACT_DEAD 0x60 /* Act timed out. */
/* Rest of the flags are straightforward representation of the SDC interface */
#define HP_SDC_STATUS_IBF 0x02 /* Input buffer full */
#define HP_SDC_STATUS_IRQMASK 0xf0 /* Bits containing "level 1" irq */
#define HP_SDC_STATUS_PERIODIC 0x10 /* Periodic 10ms timer */
#define HP_SDC_STATUS_USERTIMER 0x20 /* "Special purpose" timer */
#define HP_SDC_STATUS_TIMER 0x30 /* Both PERIODIC and USERTIMER */
#define HP_SDC_STATUS_REG 0x40 /* Data from an i8042 register */
#define HP_SDC_STATUS_HILCMD 0x50 /* Command from HIL MLC */
#define HP_SDC_STATUS_HILDATA 0x60 /* Data from HIL MLC */
#define HP_SDC_STATUS_PUP 0x70 /* Sucessful power-up self test */
#define HP_SDC_STATUS_KCOOKED 0x80 /* Key from cooked kbd */
#define HP_SDC_STATUS_KRPG 0xc0 /* Key from Repeat Gen */
#define HP_SDC_STATUS_KMOD_SUP 0x10 /* Shift key is up */
#define HP_SDC_STATUS_KMOD_CUP 0x20 /* Control key is up */
#define HP_SDC_NMISTATUS_FHS 0x40 /* NMI is a fast handshake irq */
/* Internal i8042 registers (there are more, but they are not too useful). */
#define HP_SDC_USE 0x02 /* Resource usage (including OB bit) */
#define HP_SDC_IM 0x04 /* Interrupt mask */
#define HP_SDC_CFG 0x11 /* Configuration register */
#define HP_SDC_KBLANGUAGE 0x12 /* Keyboard language */
#define HP_SDC_D0 0x70 /* General purpose data buffer 0 */
#define HP_SDC_D1 0x71 /* General purpose data buffer 1 */
#define HP_SDC_D2 0x72 /* General purpose data buffer 2 */
#define HP_SDC_D3 0x73 /* General purpose data buffer 3 */
#define HP_SDC_VT1 0x74 /* Timer for voice 1 */
#define HP_SDC_VT2 0x75 /* Timer for voice 2 */
#define HP_SDC_VT3 0x76 /* Timer for voice 3 */
#define HP_SDC_VT4 0x77 /* Timer for voice 4 */
#define HP_SDC_KBN 0x78 /* Which HIL devs are Nimitz */
#define HP_SDC_KBC 0x79 /* Which HIL devs are cooked kbds */
#define HP_SDC_LPS 0x7a /* i8042's view of HIL status */
#define HP_SDC_LPC 0x7b /* i8042's view of HIL "control" */
#define HP_SDC_RSV 0x7c /* Reserved "for testing" */
#define HP_SDC_LPR 0x7d /* i8042 count of HIL reconfigs */
#define HP_SDC_XTD 0x7e /* "Extended Configuration" register */
#define HP_SDC_STR 0x7f /* i8042 self-test result */
/* Bitfields for above registers */
#define HP_SDC_USE_LOOP 0x04 /* Command is currently on the loop. */
#define HP_SDC_IM_MASK 0x1f /* these bits not part of cmd/status */
#define HP_SDC_IM_FH 0x10 /* Mask the fast handshake irq */
#define HP_SDC_IM_PT 0x08 /* Mask the periodic timer irq */
#define HP_SDC_IM_TIMERS 0x04 /* Mask the MT/DT/CT irq */
#define HP_SDC_IM_RESET 0x02 /* Mask the reset key irq */
#define HP_SDC_IM_HIL 0x01 /* Mask the HIL MLC irq */
#define HP_SDC_CFG_ROLLOVER 0x08 /* WTF is "N-key rollover"? */
#define HP_SDC_CFG_KBD 0x10 /* There is a keyboard */
#define HP_SDC_CFG_NEW 0x20 /* Supports/uses HIL MLC */
#define HP_SDC_CFG_KBD_OLD 0x03 /* keyboard code for non-HIL */
#define HP_SDC_CFG_KBD_NEW 0x07 /* keyboard code from HIL autoconfig */
#define HP_SDC_CFG_REV 0x40 /* Code revision bit */
#define HP_SDC_CFG_IDPROM 0x80 /* IDPROM present in kbd (not HIL) */
#define HP_SDC_LPS_NDEV 0x07 /* # devices autoconfigured on HIL */
#define HP_SDC_LPS_ACSUCC 0x08 /* loop autoconfigured successfully */
#define HP_SDC_LPS_ACFAIL 0x80 /* last loop autoconfigure failed */
#define HP_SDC_LPC_APE_IPF 0x01 /* HIL MLC APE/IPF (autopoll) set */
#define HP_SDC_LPC_ARCONERR 0x02 /* i8042 autoreconfigs loop on err */
#define HP_SDC_LPC_ARCQUIET 0x03 /* i8042 doesn't report autoreconfigs*/
#define HP_SDC_LPC_COOK 0x10 /* i8042 cooks devices in _KBN */
#define HP_SDC_LPC_RC 0x80 /* causes autoreconfig */
#define HP_SDC_XTD_REV 0x07 /* contains revision code */
#define HP_SDC_XTD_REV_STRINGS(val, str) \
switch (val) { \
case 0x1: str = "1820-3712"; break; \
case 0x2: str = "1820-4379"; break; \
case 0x3: str = "1820-4784"; break; \
default: str = "unknown"; \
};
#define HP_SDC_XTD_BEEPER 0x08 /* TI SN76494 beeper available */
#define HP_SDC_XTD_BBRTC 0x20 /* OKI MSM-58321 BBRTC present */
#define HP_SDC_CMD_LOAD_RT 0x31 /* Load real time (from 8042) */
#define HP_SDC_CMD_LOAD_FHS 0x36 /* Load the fast handshake timer */
#define HP_SDC_CMD_LOAD_MT 0x38 /* Load the match timer */
#define HP_SDC_CMD_LOAD_DT 0x3B /* Load the delay timer */
#define HP_SDC_CMD_LOAD_CT 0x3E /* Load the cycle timer */
#define HP_SDC_CMD_SET_IM 0x40 /* 010xxxxx == set irq mask */
/* The documents provided do not explicitly state that all registers betweem
* 0x01 and 0x1f inclusive can be read by sending their register index as a
* command, but this is implied and appears to be the case.
*/
#define HP_SDC_CMD_READ_RAM 0x00 /* Load from i8042 RAM (autoinc) */
#define HP_SDC_CMD_READ_USE 0x02 /* Undocumented! Load from usage reg */
#define HP_SDC_CMD_READ_IM 0x04 /* Load current interrupt mask */
#define HP_SDC_CMD_READ_KCC 0x11 /* Load primary kbd config code */
#define HP_SDC_CMD_READ_KLC 0x12 /* Load primary kbd language code */
#define HP_SDC_CMD_READ_T1 0x13 /* Load timer output buffer byte 1 */
#define HP_SDC_CMD_READ_T2 0x14 /* Load timer output buffer byte 1 */
#define HP_SDC_CMD_READ_T3 0x15 /* Load timer output buffer byte 1 */
#define HP_SDC_CMD_READ_T4 0x16 /* Load timer output buffer byte 1 */
#define HP_SDC_CMD_READ_T5 0x17 /* Load timer output buffer byte 1 */
#define HP_SDC_CMD_READ_D0 0xf0 /* Load from i8042 RAM location 0x70 */
#define HP_SDC_CMD_READ_D1 0xf1 /* Load from i8042 RAM location 0x71 */
#define HP_SDC_CMD_READ_D2 0xf2 /* Load from i8042 RAM location 0x72 */
#define HP_SDC_CMD_READ_D3 0xf3 /* Load from i8042 RAM location 0x73 */
#define HP_SDC_CMD_READ_VT1 0xf4 /* Load from i8042 RAM location 0x74 */
#define HP_SDC_CMD_READ_VT2 0xf5 /* Load from i8042 RAM location 0x75 */
#define HP_SDC_CMD_READ_VT3 0xf6 /* Load from i8042 RAM location 0x76 */
#define HP_SDC_CMD_READ_VT4 0xf7 /* Load from i8042 RAM location 0x77 */
#define HP_SDC_CMD_READ_KBN 0xf8 /* Load from i8042 RAM location 0x78 */
#define HP_SDC_CMD_READ_KBC 0xf9 /* Load from i8042 RAM location 0x79 */
#define HP_SDC_CMD_READ_LPS 0xfa /* Load from i8042 RAM location 0x7a */
#define HP_SDC_CMD_READ_LPC 0xfb /* Load from i8042 RAM location 0x7b */
#define HP_SDC_CMD_READ_RSV 0xfc /* Load from i8042 RAM location 0x7c */
#define HP_SDC_CMD_READ_LPR 0xfd /* Load from i8042 RAM location 0x7d */
#define HP_SDC_CMD_READ_XTD 0xfe /* Load from i8042 RAM location 0x7e */
#define HP_SDC_CMD_READ_STR 0xff /* Load from i8042 RAM location 0x7f */
#define HP_SDC_CMD_SET_ARD 0xA0 /* Set emulated autorepeat delay */
#define HP_SDC_CMD_SET_ARR 0xA2 /* Set emulated autorepeat rate */
#define HP_SDC_CMD_SET_BELL 0xA3 /* Set voice 3 params for "beep" cmd */
#define HP_SDC_CMD_SET_RPGR 0xA6 /* Set "RPG" irq rate (doesn't work) */
#define HP_SDC_CMD_SET_RTMS 0xAD /* Set the RTC time (milliseconds) */
#define HP_SDC_CMD_SET_RTD 0xAF /* Set the RTC time (days) */
#define HP_SDC_CMD_SET_FHS 0xB2 /* Set fast handshake timer */
#define HP_SDC_CMD_SET_MT 0xB4 /* Set match timer */
#define HP_SDC_CMD_SET_DT 0xB7 /* Set delay timer */
#define HP_SDC_CMD_SET_CT 0xBA /* Set cycle timer */
#define HP_SDC_CMD_SET_RAMP 0xC1 /* Reset READ_RAM autoinc counter */
#define HP_SDC_CMD_SET_D0 0xe0 /* Load to i8042 RAM location 0x70 */
#define HP_SDC_CMD_SET_D1 0xe1 /* Load to i8042 RAM location 0x71 */
#define HP_SDC_CMD_SET_D2 0xe2 /* Load to i8042 RAM location 0x72 */
#define HP_SDC_CMD_SET_D3 0xe3 /* Load to i8042 RAM location 0x73 */
#define HP_SDC_CMD_SET_VT1 0xe4 /* Load to i8042 RAM location 0x74 */
#define HP_SDC_CMD_SET_VT2 0xe5 /* Load to i8042 RAM location 0x75 */
#define HP_SDC_CMD_SET_VT3 0xe6 /* Load to i8042 RAM location 0x76 */
#define HP_SDC_CMD_SET_VT4 0xe7 /* Load to i8042 RAM location 0x77 */
#define HP_SDC_CMD_SET_KBN 0xe8 /* Load to i8042 RAM location 0x78 */
#define HP_SDC_CMD_SET_KBC 0xe9 /* Load to i8042 RAM location 0x79 */
#define HP_SDC_CMD_SET_LPS 0xea /* Load to i8042 RAM location 0x7a */
#define HP_SDC_CMD_SET_LPC 0xeb /* Load to i8042 RAM location 0x7b */
#define HP_SDC_CMD_SET_RSV 0xec /* Load to i8042 RAM location 0x7c */
#define HP_SDC_CMD_SET_LPR 0xed /* Load to i8042 RAM location 0x7d */
#define HP_SDC_CMD_SET_XTD 0xee /* Load to i8042 RAM location 0x7e */
#define HP_SDC_CMD_SET_STR 0xef /* Load to i8042 RAM location 0x7f */
#define HP_SDC_CMD_DO_RTCW 0xc2 /* i8042 RAM 0x70 --> RTC */
#define HP_SDC_CMD_DO_RTCR 0xc3 /* RTC[0x70 0:3] --> irq/status/data */
#define HP_SDC_CMD_DO_BEEP 0xc4 /* i8042 RAM 0x70-74 --> beeper,VT3 */
#define HP_SDC_CMD_DO_HIL 0xc5 /* i8042 RAM 0x70-73 -->
HIL MLC R0,R1 i8042 HIL watchdog */
/* Values used to (de)mangle input/output to/from the HIL MLC */
#define HP_SDC_DATA 0x40 /* Data from an 8042 register */
#define HP_SDC_HIL_CMD 0x50 /* Data from HIL MLC R1/8042 */
#define HP_SDC_HIL_R1MASK 0x0f /* Contents of HIL MLC R1 0:3 */
#define HP_SDC_HIL_AUTO 0x10 /* Set if POL results from i8042 */
#define HP_SDC_HIL_ISERR 0x80 /* Has meaning as in next 4 values */
#define HP_SDC_HIL_RC_DONE 0x80 /* i8042 auto-configured loop */
#define HP_SDC_HIL_ERR 0x81 /* HIL MLC R2 had a bit set */
#define HP_SDC_HIL_TO 0x82 /* i8042 HIL watchdog expired */
#define HP_SDC_HIL_RC 0x84 /* i8042 is auto-configuring loop */
#define HP_SDC_HIL_DAT 0x60 /* Data from HIL MLC R0 */
typedef struct {
rwlock_t ibf_lock;
rwlock_t lock; /* user/tasklet lock */
rwlock_t rtq_lock; /* isr/tasklet lock */
rwlock_t hook_lock; /* isr/user lock for handler add/del */
unsigned int irq, nmi; /* Our IRQ lines */
unsigned long base_io, status_io, data_io; /* Our IO ports */
uint8_t im; /* Interrupt mask */
int set_im; /* Interrupt mask needs to be set. */
int ibf; /* Last known status of IBF flag */
uint8_t wi; /* current i8042 write index */
uint8_t r7[4]; /* current i8042[0x70 - 0x74] values */
uint8_t r11, r7e; /* Values from version/revision regs */
hp_sdc_irqhook *timer, *reg, *hil, *pup, *cooked;
#define HP_SDC_QUEUE_LEN 16
hp_sdc_transaction *tq[HP_SDC_QUEUE_LEN]; /* All pending read/writes */
int rcurr, rqty; /* Current read transact in process */
struct timeval rtv; /* Time when current read started */
int wcurr; /* Current write transact in process */
int dev_err; /* carries status from registration */
#if defined(__hppa__)
struct parisc_device *dev;
#elif defined(__mc68000__)
void *dev;
#else
#error No support for device registration on this arch yet.
#endif
struct timer_list kicker; /* Keeps below task alive */
struct tasklet_struct task;
} hp_i8042_sdc;
#endif /* _LINUX_HP_SDC_H */
