1/********************************************************************* 2 * 3 * Filename: act200l.c 4 * Version: 0.8 5 * Description: Implementation for the ACTiSYS ACT-IR200L dongle 6 * Status: Experimental. 7 * Author: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp> 8 * Created at: Fri Aug 3 17:35:42 2001 9 * Modified at: Fri Aug 17 10:22:40 2001 10 * Modified by: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp> 11 * 12 * Copyright (c) 2001 SHIMIZU Takuya, All Rights Reserved. 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License as 16 * published by the Free Software Foundation; either version 2 of 17 * the License, or (at your option) any later version. 18 * 19 ********************************************************************/ 20 21#include <linux/module.h> 22#include <linux/delay.h> 23#include <linux/init.h> 24 25#include <net/irda/irda.h> 26 27#include "sir-dev.h" 28 29static int act200l_reset(struct sir_dev *dev); 30static int act200l_open(struct sir_dev *dev); 31static int act200l_close(struct sir_dev *dev); 32static int act200l_change_speed(struct sir_dev *dev, unsigned speed); 33 34/* Regsiter 0: Control register #1 */ 35#define ACT200L_REG0 0x00 36#define ACT200L_TXEN 0x01 /* Enable transmitter */ 37#define ACT200L_RXEN 0x02 /* Enable receiver */ 38 39/* Register 1: Control register #2 */ 40#define ACT200L_REG1 0x10 41#define ACT200L_LODB 0x01 /* Load new baud rate count value */ 42#define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */ 43 44/* Register 4: Output Power register */ 45#define ACT200L_REG4 0x40 46#define ACT200L_OP0 0x01 /* Enable LED1C output */ 47#define ACT200L_OP1 0x02 /* Enable LED2C output */ 48#define ACT200L_BLKR 0x04 49 50/* Register 5: Receive Mode register */ 51#define ACT200L_REG5 0x50 52#define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */ 53 54/* Register 6: Receive Sensitivity register #1 */ 55#define ACT200L_REG6 0x60 56#define ACT200L_RS0 0x01 /* receive threshold bit 0 */ 57#define ACT200L_RS1 0x02 /* receive threshold bit 1 */ 58 59/* Register 7: Receive Sensitivity register #2 */ 60#define ACT200L_REG7 0x70 61#define ACT200L_ENPOS 0x04 /* Ignore the falling edge */ 62 63/* Register 8,9: Baud Rate Dvider register #1,#2 */ 64#define ACT200L_REG8 0x80 65#define ACT200L_REG9 0x90 66 67#define ACT200L_2400 0x5f 68#define ACT200L_9600 0x17 69#define ACT200L_19200 0x0b 70#define ACT200L_38400 0x05 71#define ACT200L_57600 0x03 72#define ACT200L_115200 0x01 73 74/* Register 13: Control register #3 */ 75#define ACT200L_REG13 0xd0 76#define ACT200L_SHDW 0x01 /* Enable access to shadow registers */ 77 78/* Register 15: Status register */ 79#define ACT200L_REG15 0xf0 80 81/* Register 21: Control register #4 */ 82#define ACT200L_REG21 0x50 83#define ACT200L_EXCK 0x02 /* Disable clock output driver */ 84#define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */ 85 86static struct dongle_driver act200l = { 87 .owner = THIS_MODULE, 88 .driver_name = "ACTiSYS ACT-IR200L", 89 .type = IRDA_ACT200L_DONGLE, 90 .open = act200l_open, 91 .close = act200l_close, 92 .reset = act200l_reset, 93 .set_speed = act200l_change_speed, 94}; 95 96static int __init act200l_sir_init(void) 97{ 98 return irda_register_dongle(&act200l); 99} 100 101static void __exit act200l_sir_cleanup(void) 102{ 103 irda_unregister_dongle(&act200l); 104} 105 106static int act200l_open(struct sir_dev *dev) 107{ 108 struct qos_info *qos = &dev->qos; 109 110 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); 111 112 /* Power on the dongle */ 113 sirdev_set_dtr_rts(dev, TRUE, TRUE); 114 115 /* Set the speeds we can accept */ 116 qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; 117 qos->min_turn_time.bits = 0x03; 118 irda_qos_bits_to_value(qos); 119 120 /* irda thread waits 50 msec for power settling */ 121 122 return 0; 123} 124 125static int act200l_close(struct sir_dev *dev) 126{ 127 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); 128 129 /* Power off the dongle */ 130 sirdev_set_dtr_rts(dev, FALSE, FALSE); 131 132 return 0; 133} 134 135/* 136 * Function act200l_change_speed (dev, speed) 137 * 138 * Set the speed for the ACTiSYS ACT-IR200L type dongle. 139 * 140 */ 141static int act200l_change_speed(struct sir_dev *dev, unsigned speed) 142{ 143 u8 control[3]; 144 int ret = 0; 145 146 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); 147 148 /* Clear DTR and set RTS to enter command mode */ 149 sirdev_set_dtr_rts(dev, FALSE, TRUE); 150 151 switch (speed) { 152 default: 153 ret = -EINVAL; 154 /* fall through */ 155 case 9600: 156 control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f); 157 control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f); 158 break; 159 case 19200: 160 control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f); 161 control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f); 162 break; 163 case 38400: 164 control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f); 165 control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f); 166 break; 167 case 57600: 168 control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f); 169 control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f); 170 break; 171 case 115200: 172 control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f); 173 control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f); 174 break; 175 } 176 control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE; 177 178 /* Write control bytes */ 179 sirdev_raw_write(dev, control, 3); 180 msleep(5); 181 182 /* Go back to normal mode */ 183 sirdev_set_dtr_rts(dev, TRUE, TRUE); 184 185 dev->speed = speed; 186 return ret; 187} 188 189/* 190 * Function act200l_reset (driver) 191 * 192 * Reset the ACTiSYS ACT-IR200L type dongle. 193 */ 194 195#define ACT200L_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET+1) 196#define ACT200L_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET+2) 197 198static int act200l_reset(struct sir_dev *dev) 199{ 200 unsigned state = dev->fsm.substate; 201 unsigned delay = 0; 202 u8 control[9] = { 203 ACT200L_REG15, 204 ACT200L_REG13 | ACT200L_SHDW, 205 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL, 206 ACT200L_REG13, 207 ACT200L_REG7 | ACT200L_ENPOS, 208 ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1, 209 ACT200L_REG5 | ACT200L_RWIDL, 210 ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR, 211 ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN 212 }; 213 int ret = 0; 214 215 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); 216 217 switch (state) { 218 case SIRDEV_STATE_DONGLE_RESET: 219 /* Reset the dongle : set RTS low for 25 ms */ 220 sirdev_set_dtr_rts(dev, TRUE, FALSE); 221 state = ACT200L_STATE_WAIT1_RESET; 222 delay = 50; 223 break; 224 225 case ACT200L_STATE_WAIT1_RESET: 226 /* Clear DTR and set RTS to enter command mode */ 227 sirdev_set_dtr_rts(dev, FALSE, TRUE); 228 229 udelay(25); /* better wait for some short while */ 230 231 /* Write control bytes */ 232 sirdev_raw_write(dev, control, sizeof(control)); 233 state = ACT200L_STATE_WAIT2_RESET; 234 delay = 15; 235 break; 236 237 case ACT200L_STATE_WAIT2_RESET: 238 /* Go back to normal mode */ 239 sirdev_set_dtr_rts(dev, TRUE, TRUE); 240 dev->speed = 9600; 241 break; 242 default: 243 IRDA_ERROR("%s(), unknown state %d\n", __FUNCTION__, state); 244 ret = -1; 245 break; 246 } 247 dev->fsm.substate = state; 248 return (delay > 0) ? delay : ret; 249} 250 251MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>"); 252MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver"); 253MODULE_LICENSE("GPL"); 254MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */ 255 256module_init(act200l_sir_init); 257module_exit(act200l_sir_cleanup); 258