1 /* 2 * HP i8042 System Device Controller -- header 3 * 4 * Copyright (c) 2001 Brian S. Julin 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * Alternatively, this software may be distributed under the terms of the 17 * GNU General Public License ("GPL"). 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * 29 * References: 30 * 31 * HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A 32 * 33 * System Device Controller Microprocessor Firmware Theory of Operation 34 * for Part Number 1820-4784 Revision B. Dwg No. A-1820-4784-2 35 * 36 */ 37 38 #ifndef _LINUX_HP_SDC_H 39 #define _LINUX_HP_SDC_H 40 41 #include <linux/interrupt.h> 42 #include <linux/types.h> 43 #include <linux/time.h> 44 #include <linux/timer.h> 45 #if defined(__hppa__) 46 #include <asm/hardware.h> 47 #endif 48 49 50 /* No 4X status reads take longer than this (in usec). 51 */ 52 #define HP_SDC_MAX_REG_DELAY 20000 53 54 typedef void (hp_sdc_irqhook) (int irq, void *dev_id, 55 uint8_t status, uint8_t data); 56 57 int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback); 58 int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback); 59 int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback); 60 int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback); 61 int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback); 62 int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback); 63 64 typedef struct { 65 int actidx; /* Start of act. Acts are atomic WRT I/O to SDC */ 66 int idx; /* Index within the act */ 67 int endidx; /* transaction is over and done if idx == endidx */ 68 uint8_t *seq; /* commands/data for the transaction */ 69 union { 70 hp_sdc_irqhook *irqhook; /* Callback, isr or tasklet context */ 71 struct semaphore *semaphore; /* Semaphore to sleep on. */ 72 } act; 73 } hp_sdc_transaction; 74 int __hp_sdc_enqueue_transaction(hp_sdc_transaction *this); 75 int hp_sdc_enqueue_transaction(hp_sdc_transaction *this); 76 int hp_sdc_dequeue_transaction(hp_sdc_transaction *this); 77 78 /* The HP_SDC_ACT* values are peculiar to this driver. 79 * Nuance: never HP_SDC_ACT_DATAIN | HP_SDC_ACT_DEALLOC, use another 80 * act to perform the dealloc. 81 */ 82 #define HP_SDC_ACT_PRECMD 0x01 /* Send a command first */ 83 #define HP_SDC_ACT_DATAREG 0x02 /* Set data registers */ 84 #define HP_SDC_ACT_DATAOUT 0x04 /* Send data bytes */ 85 #define HP_SDC_ACT_POSTCMD 0x08 /* Send command after */ 86 #define HP_SDC_ACT_DATAIN 0x10 /* Collect data after */ 87 #define HP_SDC_ACT_DURING 0x1f 88 #define HP_SDC_ACT_SEMAPHORE 0x20 /* Raise semaphore after */ 89 #define HP_SDC_ACT_CALLBACK 0x40 /* Pass data to IRQ handler */ 90 #define HP_SDC_ACT_DEALLOC 0x80 /* Destroy transaction after */ 91 #define HP_SDC_ACT_AFTER 0xe0 92 #define HP_SDC_ACT_DEAD 0x60 /* Act timed out. */ 93 94 /* Rest of the flags are straightforward representation of the SDC interface */ 95 #define HP_SDC_STATUS_IBF 0x02 /* Input buffer full */ 96 97 #define HP_SDC_STATUS_IRQMASK 0xf0 /* Bits containing "level 1" irq */ 98 #define HP_SDC_STATUS_PERIODIC 0x10 /* Periodic 10ms timer */ 99 #define HP_SDC_STATUS_USERTIMER 0x20 /* "Special purpose" timer */ 100 #define HP_SDC_STATUS_TIMER 0x30 /* Both PERIODIC and USERTIMER */ 101 #define HP_SDC_STATUS_REG 0x40 /* Data from an i8042 register */ 102 #define HP_SDC_STATUS_HILCMD 0x50 /* Command from HIL MLC */ 103 #define HP_SDC_STATUS_HILDATA 0x60 /* Data from HIL MLC */ 104 #define HP_SDC_STATUS_PUP 0x70 /* Successful power-up self test */ 105 #define HP_SDC_STATUS_KCOOKED 0x80 /* Key from cooked kbd */ 106 #define HP_SDC_STATUS_KRPG 0xc0 /* Key from Repeat Gen */ 107 #define HP_SDC_STATUS_KMOD_SUP 0x10 /* Shift key is up */ 108 #define HP_SDC_STATUS_KMOD_CUP 0x20 /* Control key is up */ 109 110 #define HP_SDC_NMISTATUS_FHS 0x40 /* NMI is a fast handshake irq */ 111 112 /* Internal i8042 registers (there are more, but they are not too useful). */ 113 114 #define HP_SDC_USE 0x02 /* Resource usage (including OB bit) */ 115 #define HP_SDC_IM 0x04 /* Interrupt mask */ 116 #define HP_SDC_CFG 0x11 /* Configuration register */ 117 #define HP_SDC_KBLANGUAGE 0x12 /* Keyboard language */ 118 119 #define HP_SDC_D0 0x70 /* General purpose data buffer 0 */ 120 #define HP_SDC_D1 0x71 /* General purpose data buffer 1 */ 121 #define HP_SDC_D2 0x72 /* General purpose data buffer 2 */ 122 #define HP_SDC_D3 0x73 /* General purpose data buffer 3 */ 123 #define HP_SDC_VT1 0x74 /* Timer for voice 1 */ 124 #define HP_SDC_VT2 0x75 /* Timer for voice 2 */ 125 #define HP_SDC_VT3 0x76 /* Timer for voice 3 */ 126 #define HP_SDC_VT4 0x77 /* Timer for voice 4 */ 127 #define HP_SDC_KBN 0x78 /* Which HIL devs are Nimitz */ 128 #define HP_SDC_KBC 0x79 /* Which HIL devs are cooked kbds */ 129 #define HP_SDC_LPS 0x7a /* i8042's view of HIL status */ 130 #define HP_SDC_LPC 0x7b /* i8042's view of HIL "control" */ 131 #define HP_SDC_RSV 0x7c /* Reserved "for testing" */ 132 #define HP_SDC_LPR 0x7d /* i8042 count of HIL reconfigs */ 133 #define HP_SDC_XTD 0x7e /* "Extended Configuration" register */ 134 #define HP_SDC_STR 0x7f /* i8042 self-test result */ 135 136 /* Bitfields for above registers */ 137 #define HP_SDC_USE_LOOP 0x04 /* Command is currently on the loop. */ 138 139 #define HP_SDC_IM_MASK 0x1f /* these bits not part of cmd/status */ 140 #define HP_SDC_IM_FH 0x10 /* Mask the fast handshake irq */ 141 #define HP_SDC_IM_PT 0x08 /* Mask the periodic timer irq */ 142 #define HP_SDC_IM_TIMERS 0x04 /* Mask the MT/DT/CT irq */ 143 #define HP_SDC_IM_RESET 0x02 /* Mask the reset key irq */ 144 #define HP_SDC_IM_HIL 0x01 /* Mask the HIL MLC irq */ 145 146 #define HP_SDC_CFG_ROLLOVER 0x08 /* WTF is "N-key rollover"? */ 147 #define HP_SDC_CFG_KBD 0x10 /* There is a keyboard */ 148 #define HP_SDC_CFG_NEW 0x20 /* Supports/uses HIL MLC */ 149 #define HP_SDC_CFG_KBD_OLD 0x03 /* keyboard code for non-HIL */ 150 #define HP_SDC_CFG_KBD_NEW 0x07 /* keyboard code from HIL autoconfig */ 151 #define HP_SDC_CFG_REV 0x40 /* Code revision bit */ 152 #define HP_SDC_CFG_IDPROM 0x80 /* IDPROM present in kbd (not HIL) */ 153 154 #define HP_SDC_LPS_NDEV 0x07 /* # devices autoconfigured on HIL */ 155 #define HP_SDC_LPS_ACSUCC 0x08 /* loop autoconfigured successfully */ 156 #define HP_SDC_LPS_ACFAIL 0x80 /* last loop autoconfigure failed */ 157 158 #define HP_SDC_LPC_APE_IPF 0x01 /* HIL MLC APE/IPF (autopoll) set */ 159 #define HP_SDC_LPC_ARCONERR 0x02 /* i8042 autoreconfigs loop on err */ 160 #define HP_SDC_LPC_ARCQUIET 0x03 /* i8042 doesn't report autoreconfigs*/ 161 #define HP_SDC_LPC_COOK 0x10 /* i8042 cooks devices in _KBN */ 162 #define HP_SDC_LPC_RC 0x80 /* causes autoreconfig */ 163 164 #define HP_SDC_XTD_REV 0x07 /* contains revision code */ 165 #define HP_SDC_XTD_REV_STRINGS(val, str) \ 166 switch (val) { \ 167 case 0x1: str = "1820-3712"; break; \ 168 case 0x2: str = "1820-4379"; break; \ 169 case 0x3: str = "1820-4784"; break; \ 170 default: str = "unknown"; \ 171 }; 172 #define HP_SDC_XTD_BEEPER 0x08 /* TI SN76494 beeper available */ 173 #define HP_SDC_XTD_BBRTC 0x20 /* OKI MSM-58321 BBRTC present */ 174 175 #define HP_SDC_CMD_LOAD_RT 0x31 /* Load real time (from 8042) */ 176 #define HP_SDC_CMD_LOAD_FHS 0x36 /* Load the fast handshake timer */ 177 #define HP_SDC_CMD_LOAD_MT 0x38 /* Load the match timer */ 178 #define HP_SDC_CMD_LOAD_DT 0x3B /* Load the delay timer */ 179 #define HP_SDC_CMD_LOAD_CT 0x3E /* Load the cycle timer */ 180 181 #define HP_SDC_CMD_SET_IM 0x40 /* 010xxxxx == set irq mask */ 182 183 /* The documents provided do not explicitly state that all registers betweem 184 * 0x01 and 0x1f inclusive can be read by sending their register index as a 185 * command, but this is implied and appears to be the case. 186 */ 187 #define HP_SDC_CMD_READ_RAM 0x00 /* Load from i8042 RAM (autoinc) */ 188 #define HP_SDC_CMD_READ_USE 0x02 /* Undocumented! Load from usage reg */ 189 #define HP_SDC_CMD_READ_IM 0x04 /* Load current interrupt mask */ 190 #define HP_SDC_CMD_READ_KCC 0x11 /* Load primary kbd config code */ 191 #define HP_SDC_CMD_READ_KLC 0x12 /* Load primary kbd language code */ 192 #define HP_SDC_CMD_READ_T1 0x13 /* Load timer output buffer byte 1 */ 193 #define HP_SDC_CMD_READ_T2 0x14 /* Load timer output buffer byte 1 */ 194 #define HP_SDC_CMD_READ_T3 0x15 /* Load timer output buffer byte 1 */ 195 #define HP_SDC_CMD_READ_T4 0x16 /* Load timer output buffer byte 1 */ 196 #define HP_SDC_CMD_READ_T5 0x17 /* Load timer output buffer byte 1 */ 197 #define HP_SDC_CMD_READ_D0 0xf0 /* Load from i8042 RAM location 0x70 */ 198 #define HP_SDC_CMD_READ_D1 0xf1 /* Load from i8042 RAM location 0x71 */ 199 #define HP_SDC_CMD_READ_D2 0xf2 /* Load from i8042 RAM location 0x72 */ 200 #define HP_SDC_CMD_READ_D3 0xf3 /* Load from i8042 RAM location 0x73 */ 201 #define HP_SDC_CMD_READ_VT1 0xf4 /* Load from i8042 RAM location 0x74 */ 202 #define HP_SDC_CMD_READ_VT2 0xf5 /* Load from i8042 RAM location 0x75 */ 203 #define HP_SDC_CMD_READ_VT3 0xf6 /* Load from i8042 RAM location 0x76 */ 204 #define HP_SDC_CMD_READ_VT4 0xf7 /* Load from i8042 RAM location 0x77 */ 205 #define HP_SDC_CMD_READ_KBN 0xf8 /* Load from i8042 RAM location 0x78 */ 206 #define HP_SDC_CMD_READ_KBC 0xf9 /* Load from i8042 RAM location 0x79 */ 207 #define HP_SDC_CMD_READ_LPS 0xfa /* Load from i8042 RAM location 0x7a */ 208 #define HP_SDC_CMD_READ_LPC 0xfb /* Load from i8042 RAM location 0x7b */ 209 #define HP_SDC_CMD_READ_RSV 0xfc /* Load from i8042 RAM location 0x7c */ 210 #define HP_SDC_CMD_READ_LPR 0xfd /* Load from i8042 RAM location 0x7d */ 211 #define HP_SDC_CMD_READ_XTD 0xfe /* Load from i8042 RAM location 0x7e */ 212 #define HP_SDC_CMD_READ_STR 0xff /* Load from i8042 RAM location 0x7f */ 213 214 #define HP_SDC_CMD_SET_ARD 0xA0 /* Set emulated autorepeat delay */ 215 #define HP_SDC_CMD_SET_ARR 0xA2 /* Set emulated autorepeat rate */ 216 #define HP_SDC_CMD_SET_BELL 0xA3 /* Set voice 3 params for "beep" cmd */ 217 #define HP_SDC_CMD_SET_RPGR 0xA6 /* Set "RPG" irq rate (doesn't work) */ 218 #define HP_SDC_CMD_SET_RTMS 0xAD /* Set the RTC time (milliseconds) */ 219 #define HP_SDC_CMD_SET_RTD 0xAF /* Set the RTC time (days) */ 220 #define HP_SDC_CMD_SET_FHS 0xB2 /* Set fast handshake timer */ 221 #define HP_SDC_CMD_SET_MT 0xB4 /* Set match timer */ 222 #define HP_SDC_CMD_SET_DT 0xB7 /* Set delay timer */ 223 #define HP_SDC_CMD_SET_CT 0xBA /* Set cycle timer */ 224 #define HP_SDC_CMD_SET_RAMP 0xC1 /* Reset READ_RAM autoinc counter */ 225 #define HP_SDC_CMD_SET_D0 0xe0 /* Load to i8042 RAM location 0x70 */ 226 #define HP_SDC_CMD_SET_D1 0xe1 /* Load to i8042 RAM location 0x71 */ 227 #define HP_SDC_CMD_SET_D2 0xe2 /* Load to i8042 RAM location 0x72 */ 228 #define HP_SDC_CMD_SET_D3 0xe3 /* Load to i8042 RAM location 0x73 */ 229 #define HP_SDC_CMD_SET_VT1 0xe4 /* Load to i8042 RAM location 0x74 */ 230 #define HP_SDC_CMD_SET_VT2 0xe5 /* Load to i8042 RAM location 0x75 */ 231 #define HP_SDC_CMD_SET_VT3 0xe6 /* Load to i8042 RAM location 0x76 */ 232 #define HP_SDC_CMD_SET_VT4 0xe7 /* Load to i8042 RAM location 0x77 */ 233 #define HP_SDC_CMD_SET_KBN 0xe8 /* Load to i8042 RAM location 0x78 */ 234 #define HP_SDC_CMD_SET_KBC 0xe9 /* Load to i8042 RAM location 0x79 */ 235 #define HP_SDC_CMD_SET_LPS 0xea /* Load to i8042 RAM location 0x7a */ 236 #define HP_SDC_CMD_SET_LPC 0xeb /* Load to i8042 RAM location 0x7b */ 237 #define HP_SDC_CMD_SET_RSV 0xec /* Load to i8042 RAM location 0x7c */ 238 #define HP_SDC_CMD_SET_LPR 0xed /* Load to i8042 RAM location 0x7d */ 239 #define HP_SDC_CMD_SET_XTD 0xee /* Load to i8042 RAM location 0x7e */ 240 #define HP_SDC_CMD_SET_STR 0xef /* Load to i8042 RAM location 0x7f */ 241 242 #define HP_SDC_CMD_DO_RTCW 0xc2 /* i8042 RAM 0x70 --> RTC */ 243 #define HP_SDC_CMD_DO_RTCR 0xc3 /* RTC[0x70 0:3] --> irq/status/data */ 244 #define HP_SDC_CMD_DO_BEEP 0xc4 /* i8042 RAM 0x70-74 --> beeper,VT3 */ 245 #define HP_SDC_CMD_DO_HIL 0xc5 /* i8042 RAM 0x70-73 --> 246 HIL MLC R0,R1 i8042 HIL watchdog */ 247 248 /* Values used to (de)mangle input/output to/from the HIL MLC */ 249 #define HP_SDC_DATA 0x40 /* Data from an 8042 register */ 250 #define HP_SDC_HIL_CMD 0x50 /* Data from HIL MLC R1/8042 */ 251 #define HP_SDC_HIL_R1MASK 0x0f /* Contents of HIL MLC R1 0:3 */ 252 #define HP_SDC_HIL_AUTO 0x10 /* Set if POL results from i8042 */ 253 #define HP_SDC_HIL_ISERR 0x80 /* Has meaning as in next 4 values */ 254 #define HP_SDC_HIL_RC_DONE 0x80 /* i8042 auto-configured loop */ 255 #define HP_SDC_HIL_ERR 0x81 /* HIL MLC R2 had a bit set */ 256 #define HP_SDC_HIL_TO 0x82 /* i8042 HIL watchdog expired */ 257 #define HP_SDC_HIL_RC 0x84 /* i8042 is auto-configuring loop */ 258 #define HP_SDC_HIL_DAT 0x60 /* Data from HIL MLC R0 */ 259 260 261 typedef struct { 262 rwlock_t ibf_lock; 263 rwlock_t lock; /* user/tasklet lock */ 264 rwlock_t rtq_lock; /* isr/tasklet lock */ 265 rwlock_t hook_lock; /* isr/user lock for handler add/del */ 266 267 unsigned int irq, nmi; /* Our IRQ lines */ 268 unsigned long base_io, status_io, data_io; /* Our IO ports */ 269 270 uint8_t im; /* Interrupt mask */ 271 int set_im; /* Interrupt mask needs to be set. */ 272 273 int ibf; /* Last known status of IBF flag */ 274 uint8_t wi; /* current i8042 write index */ 275 uint8_t r7[4]; /* current i8042[0x70 - 0x74] values */ 276 uint8_t r11, r7e; /* Values from version/revision regs */ 277 278 hp_sdc_irqhook *timer, *reg, *hil, *pup, *cooked; 279 280 #define HP_SDC_QUEUE_LEN 16 281 hp_sdc_transaction *tq[HP_SDC_QUEUE_LEN]; /* All pending read/writes */ 282 283 int rcurr, rqty; /* Current read transact in process */ 284 ktime_t rtime; /* Time when current read started */ 285 int wcurr; /* Current write transact in process */ 286 287 int dev_err; /* carries status from registration */ 288 #if defined(__hppa__) 289 struct parisc_device *dev; 290 #elif defined(__mc68000__) 291 void *dev; 292 #else 293 #error No support for device registration on this arch yet. 294 #endif 295 296 struct timer_list kicker; /* Keeps below task alive */ 297 struct tasklet_struct task; 298 299 } hp_i8042_sdc; 300 301 #endif /* _LINUX_HP_SDC_H */ 302