thodg/cgminer/A1-board-selector-CCR.c

• Show log

  Commit

• Hash : 114f9fd2
  Author :
  Date : 2014-06-03T18:47:29
  

  A1: add support for updated product variants, small fixes This patch includes: * generalize I2C slave access * adapt CoinCraft Rig board selector to new design * add support for single chip chains * adapt verbosity levels * check for chip clocks below 100MHz

Download

• A1-board-selector-CCR.c

• /*
   * board selector support for TCA9535 used in Bitmine's CoinCraft Desk
   *
   * Copyright 2014 Zefir Kurtisi <zefir.kurtisi@gmail.com>
   *
   * 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 3 of the License, or (at your option)
   * any later version.  See COPYING for more details.
   */
  
  
  #include "miner.h"
  
  #include "A1-board-selector.h"
  #include "i2c-context.h"
  
  
  static struct board_selector ccr_selector;
  
  static struct i2c_ctx *U1_tca9548;
  static struct i2c_ctx *U3_tca9535;
  static struct i2c_ctx *U4_tca9535;
  static uint8_t active_chain;
  static pthread_mutex_t lock;
  
  struct chain_mapping {
  	uint8_t chain_id;
  	uint8_t U1;
  	uint8_t U3p0;
  	uint8_t U3p1;
  };
  
  static const struct chain_mapping chain_mapping[CCR_MAX_CHAINS] = {
  	{  0, 0x01, 0x01, 0x00, },
  	{  1, 0x01, 0x00, 0x80, },
  	{  2, 0x02, 0x02, 0x00, },
  	{  3, 0x02, 0x00, 0x40, },
  	{  4, 0x04, 0x04, 0x00, },
  	{  5, 0x04, 0x00, 0x20, },
  	{  6, 0x08, 0x08, 0x00, },
  	{  7, 0x08, 0x00, 0x10, },
  	{  8, 0x10, 0x10, 0x00, },
  	{  9, 0x10, 0x00, 0x08, },
  	{ 10, 0x20, 0x20, 0x00, },
  	{ 11, 0x20, 0x00, 0x04, },
  	{ 12, 0x40, 0x40, 0x00, },
  	{ 13, 0x40, 0x00, 0x02, },
  	{ 14, 0x80, 0x80, 0x00, },
  	{ 15, 0x80, 0x00, 0x01, },
  };
  
  static void ccr_unlock(void)
  {
  	mutex_unlock(&lock);
  }
  
  static void ccr_exit(void)
  {
  	if (U1_tca9548 != NULL)
  		U1_tca9548->exit(U1_tca9548);
  	if (U3_tca9535 != NULL)
  		U3_tca9535->exit(U3_tca9535);
  	if (U4_tca9535 != NULL)
  		U4_tca9535->exit(U4_tca9535);
  }
  
  
  extern struct board_selector *ccr_board_selector_init(void)
  {
  	mutex_init(&lock);
  	applog(LOG_INFO, "ccr_board_selector_init()");
  
  	/* detect all i2c slaves */
  	U1_tca9548 = i2c_slave_open(I2C_BUS, 0x70);
  	U3_tca9535 = i2c_slave_open(I2C_BUS, 0x23);
  	U4_tca9535 = i2c_slave_open(I2C_BUS, 0x22);
  	if (U1_tca9548 == NULL || U3_tca9535 == NULL || U4_tca9535 == NULL)
  		goto fail;
  
  			/* init I2C multiplexer */
  	bool res =	U1_tca9548->write(U1_tca9548, 0x00, 0x00) &&
  			/* init reset selector */
  			U3_tca9535->write(U3_tca9535, 0x06, 0x00) &&
  			U3_tca9535->write(U3_tca9535, 0x07, 0x00) &&
  			U3_tca9535->write(U3_tca9535, 0x02, 0x00) &&
  			U3_tca9535->write(U3_tca9535, 0x03, 0x00) &&
  			/* init chain selector */
  			U4_tca9535->write(U4_tca9535, 0x06, 0x00) &&
  			U4_tca9535->write(U4_tca9535, 0x07, 0x00) &&
  			U4_tca9535->write(U4_tca9535, 0x02, 0x00) &&
  			U4_tca9535->write(U4_tca9535, 0x03, 0x00);
  
  	if (!res)
  		goto fail;
  
  	return &ccr_selector;
  
  fail:
  	ccr_exit();
  	return NULL;
  }
  
  static bool ccr_select(uint8_t chain)
  {
  	if (chain >= CCR_MAX_CHAINS)
  		return false;
  
  	mutex_lock(&lock);
  	if (active_chain == chain)
  		return true;
  
  	active_chain = chain;
  	const struct chain_mapping *cm = &chain_mapping[chain];
  
  	if (!U1_tca9548->write(U1_tca9548, cm->U1, cm->U1))
  		return false;
  
  	if (!U4_tca9535->write(U4_tca9535, 0x02, cm->U3p0) ||
  	    !U4_tca9535->write(U4_tca9535, 0x03, cm->U3p1))
  		return false;
  
  	/* sanity check: ensure i2c command has been written before we leave */
  	uint8_t tmp;
  	if (!U4_tca9535->read(U4_tca9535, 0x02, &tmp) || tmp != cm->U3p0) {
  		applog(LOG_ERR, "ccr_select: wrote 0x%02x, read 0x%02x",
  		       cm->U3p0, tmp);
  	}
  	applog(LOG_DEBUG, "selected chain %d", chain);
  	return true;
  }
  
  static bool __ccr_board_selector_reset(uint8_t p0, uint8_t p1)
  {
  	if (!U3_tca9535->write(U3_tca9535, 0x02, p0) ||
  	    !U3_tca9535->write(U3_tca9535, 0x03, p1))
  		return false;
  	cgsleep_ms(RESET_LOW_TIME_MS);
  	if (!U3_tca9535->write(U3_tca9535, 0x02, 0x00) ||
  	    !U3_tca9535->write(U3_tca9535, 0x03, 0x00))
  		return false;
  	cgsleep_ms(RESET_HI_TIME_MS);
  	return true;
  }
  // we assume we are already holding the mutex
  static bool ccr_reset(void)
  {
  	const struct chain_mapping *cm = &chain_mapping[active_chain];
  	applog(LOG_DEBUG, "resetting chain %d", cm->chain_id);
  	bool retval = __ccr_board_selector_reset(cm->U3p0, cm->U3p1);
  	return retval;
  }
  
  static bool ccr_reset_all(void)
  {
  	mutex_lock(&lock);
  	bool retval = __ccr_board_selector_reset(0xff, 0xff);
  	mutex_unlock(&lock);
  	return retval;
  }
  
  static uint8_t ccr_get_temp(uint8_t sensor_id)
  {
  	if ((active_chain & 1) != 0 || sensor_id != 0)
  		return 0;
  
  	struct i2c_ctx *U7 = i2c_slave_open(I2C_BUS, 0x4c);
  	if (U7 == NULL)
  		return 0;
  
  	uint8_t retval = 0;
  	if (!U7->read(U7, 0, &retval))
  		retval = 0;
  	U7->exit(U7);
  	return retval;
  }
  
  static struct board_selector ccr_selector = {
  	.select = ccr_select,
  	.release = ccr_unlock,
  	.exit = ccr_exit,
  	.reset = ccr_reset,
  	.reset_all = ccr_reset_all,
  	.get_temp = ccr_get_temp,
  };
  
  

Download