/********************************************************************* * * Filename: act200l.c * Version: 0.8 * Description: Implementation for the ACTiSYS ACT-IR200L dongle * Status: Experimental. * Author: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp> * Created at: Fri Aug 3 17:35:42 2001 * Modified at: Fri Aug 17 10:22:40 2001 * Modified by: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp> * * Copyright (c) 2001 SHIMIZU Takuya, All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * ********************************************************************/ #include <linux/module.h> #include <linux/delay.h> #include <linux/init.h> #include <net/irda/irda.h> #include "sir-dev.h" static int act200l_reset(struct sir_dev *dev); static int act200l_open(struct sir_dev *dev); static int act200l_close(struct sir_dev *dev); static int act200l_change_speed(struct sir_dev *dev, unsigned speed); /* Regsiter 0: Control register #1 */ #define ACT200L_REG0 0x00 #define ACT200L_TXEN 0x01 /* Enable transmitter */ #define ACT200L_RXEN 0x02 /* Enable receiver */ /* Register 1: Control register #2 */ #define ACT200L_REG1 0x10 #define ACT200L_LODB 0x01 /* Load new baud rate count value */ #define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */ /* Register 4: Output Power register */ #define ACT200L_REG4 0x40 #define ACT200L_OP0 0x01 /* Enable LED1C output */ #define ACT200L_OP1 0x02 /* Enable LED2C output */ #define ACT200L_BLKR 0x04 /* Register 5: Receive Mode register */ #define ACT200L_REG5 0x50 #define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */ /* Register 6: Receive Sensitivity register #1 */ #define ACT200L_REG6 0x60 #define ACT200L_RS0 0x01 /* receive threshold bit 0 */ #define ACT200L_RS1 0x02 /* receive threshold bit 1 */ /* Register 7: Receive Sensitivity register #2 */ #define ACT200L_REG7 0x70 #define ACT200L_ENPOS 0x04 /* Ignore the falling edge */ /* Register 8,9: Baud Rate Dvider register #1,#2 */ #define ACT200L_REG8 0x80 #define ACT200L_REG9 0x90 #define ACT200L_2400 0x5f #define ACT200L_9600 0x17 #define ACT200L_19200 0x0b #define ACT200L_38400 0x05 #define ACT200L_57600 0x03 #define ACT200L_115200 0x01 /* Register 13: Control register #3 */ #define ACT200L_REG13 0xd0 #define ACT200L_SHDW 0x01 /* Enable access to shadow registers */ /* Register 15: Status register */ #define ACT200L_REG15 0xf0 /* Register 21: Control register #4 */ #define ACT200L_REG21 0x50 #define ACT200L_EXCK 0x02 /* Disable clock output driver */ #define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */ static struct dongle_driver act200l = { .owner = THIS_MODULE, .driver_name = "ACTiSYS ACT-IR200L", .type = IRDA_ACT200L_DONGLE, .open = act200l_open, .close = act200l_close, .reset = act200l_reset, .set_speed = act200l_change_speed, }; static int __init act200l_sir_init(void) { return irda_register_dongle(&act200l); } static void __exit act200l_sir_cleanup(void) { irda_unregister_dongle(&act200l); } static int act200l_open(struct sir_dev *dev) { struct qos_info *qos = &dev->qos; IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); /* Power on the dongle */ sirdev_set_dtr_rts(dev, TRUE, TRUE); /* Set the speeds we can accept */ qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; qos->min_turn_time.bits = 0x03; irda_qos_bits_to_value(qos); /* irda thread waits 50 msec for power settling */ return 0; } static int act200l_close(struct sir_dev *dev) { IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); /* Power off the dongle */ sirdev_set_dtr_rts(dev, FALSE, FALSE); return 0; } /* * Function act200l_change_speed (dev, speed) * * Set the speed for the ACTiSYS ACT-IR200L type dongle. * */ static int act200l_change_speed(struct sir_dev *dev, unsigned speed) { u8 control[3]; int ret = 0; IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); /* Clear DTR and set RTS to enter command mode */ sirdev_set_dtr_rts(dev, FALSE, TRUE); switch (speed) { default: ret = -EINVAL; /* fall through */ case 9600: control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f); control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f); break; case 19200: control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f); control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f); break; case 38400: control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f); control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f); break; case 57600: control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f); control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f); break; case 115200: control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f); control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f); break; } control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE; /* Write control bytes */ sirdev_raw_write(dev, control, 3); msleep(5); /* Go back to normal mode */ sirdev_set_dtr_rts(dev, TRUE, TRUE); dev->speed = speed; return ret; } /* * Function act200l_reset (driver) * * Reset the ACTiSYS ACT-IR200L type dongle. */ #define ACT200L_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET+1) #define ACT200L_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET+2) static int act200l_reset(struct sir_dev *dev) { unsigned state = dev->fsm.substate; unsigned delay = 0; u8 control[9] = { ACT200L_REG15, ACT200L_REG13 | ACT200L_SHDW, ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL, ACT200L_REG13, ACT200L_REG7 | ACT200L_ENPOS, ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1, ACT200L_REG5 | ACT200L_RWIDL, ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR, ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN }; int ret = 0; IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); switch (state) { case SIRDEV_STATE_DONGLE_RESET: /* Reset the dongle : set RTS low for 25 ms */ sirdev_set_dtr_rts(dev, TRUE, FALSE); state = ACT200L_STATE_WAIT1_RESET; delay = 50; break; case ACT200L_STATE_WAIT1_RESET: /* Clear DTR and set RTS to enter command mode */ sirdev_set_dtr_rts(dev, FALSE, TRUE); udelay(25); /* better wait for some short while */ /* Write control bytes */ sirdev_raw_write(dev, control, sizeof(control)); state = ACT200L_STATE_WAIT2_RESET; delay = 15; break; case ACT200L_STATE_WAIT2_RESET: /* Go back to normal mode */ sirdev_set_dtr_rts(dev, TRUE, TRUE); dev->speed = 9600; break; default: IRDA_ERROR("%s(), unknown state %d\n", __FUNCTION__, state); ret = -1; break; } dev->fsm.substate = state; return (delay > 0) ? delay : ret; } MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>"); MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */ module_init(act200l_sir_init); module_exit(act200l_sir_cleanup);