| /* |
| * 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_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 /* Successful 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 between |
| * 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 */ |
| ktime_t rtime; /* 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 */ |
