1 files changed, 0 insertions, 127 deletions
diff --git a/usrp2/firmware/lib/i2c.c b/usrp2/firmware/lib/i2c.c
deleted file mode 100644
index 3f738733b..000000000
--- a/usrp2/firmware/lib/i2c.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* -*- c -*- */
-/*
- * Copyright 2007 Free Software Foundation, Inc.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "i2c.h"
-#include "memory_map.h"
-#include "stdint.h"
-
-#define MAX_WB_DIV 4	// maximum wishbone divisor (from 100 MHz MASTER_CLK)
-
-// prescaler divisor values for 100 kHz I2C [uses 5 * SCLK internally]
-
-#define PRESCALER(wb_div) (((MASTER_CLK_RATE/(wb_div)) / (5 * 100000)) - 1)
-
-static uint16_t prescaler_values[MAX_WB_DIV+1] = {
-  0xffff,	// 0: can't happen
-  PRESCALER(1),	// 1: 100 MHz
-  PRESCALER(2), // 2:  50 MHz
-  PRESCALER(3), // 3:  33.333 MHz
-  PRESCALER(4), // 4:  25 MHz
-};
-
-void
-i2c_init(void)
-{
-  i2c_regs->ctrl = 0;		// disable core
-  
-  // setup prescaler depending on wishbone divisor
-  int wb_div = hwconfig_wishbone_divisor();
-  if (wb_div > MAX_WB_DIV)
-    wb_div = MAX_WB_DIV;
-
-  i2c_regs->prescaler_lo = prescaler_values[wb_div] & 0xff;
-  i2c_regs->prescaler_hi = (prescaler_values[wb_div] >> 8) & 0xff;
-
-  i2c_regs->ctrl = I2C_CTRL_EN;	// enable core
-
-  // FIXME interrupt driven?
-}
-
-static inline void
-wait_for_xfer(void)
-{
-  while (i2c_regs->cmd_status & I2C_ST_TIP)	// wait for xfer to complete
-    ;
-}
-
-static inline bool
-wait_chk_ack(void)
-{
-  wait_for_xfer();
-
-  if ((i2c_regs->cmd_status & I2C_ST_RXACK) != 0){	// target NAK'd
-    return false;
-  }
-  return true;
-}
-
-bool 
-i2c_read (unsigned char i2c_addr, unsigned char *buf, unsigned int len)
-{
-  if (len == 0)			// reading zero bytes always works
-    return true;
-
-  while (i2c_regs->cmd_status & I2C_ST_BUSY)
-    ;
-
-  i2c_regs->data = (i2c_addr << 1) | 1;	 // 7 bit address and read bit (1)
-  // generate START and write addr
-  i2c_regs->cmd_status = I2C_CMD_WR | I2C_CMD_START;
-  if (!wait_chk_ack())
-    goto fail;
-
-  for (; len > 0; buf++, len--){
-    i2c_regs->cmd_status = I2C_CMD_RD | (len == 1 ? (I2C_CMD_NACK | I2C_CMD_STOP) : 0);
-    wait_for_xfer();
-    *buf = i2c_regs->data;
-  }
-  return true;
-
- fail:
-  i2c_regs->cmd_status = I2C_CMD_STOP;  // generate STOP
-  return false;
-}
-
-
-bool 
-i2c_write(unsigned char i2c_addr, const unsigned char *buf, unsigned int len)
-{
-  while (i2c_regs->cmd_status & I2C_ST_BUSY)
-    ;
-
-  i2c_regs->data = (i2c_addr << 1) | 0;	 // 7 bit address and write bit (0)
-
-  // generate START and write addr (and maybe STOP)
-  i2c_regs->cmd_status = I2C_CMD_WR | I2C_CMD_START | (len == 0 ? I2C_CMD_STOP : 0);  
-  if (!wait_chk_ack())
-    goto fail;
-
-  for (; len > 0; buf++, len--){
-    i2c_regs->data = *buf;
-    i2c_regs->cmd_status = I2C_CMD_WR | (len == 1 ? I2C_CMD_STOP : 0);
-    if (!wait_chk_ack())
-      goto fail;
-  }
-  return true;
-
- fail:
-  i2c_regs->cmd_status = I2C_CMD_STOP;  // generate STOP
-  return false;
-}
-
-