diff options
| -rw-r--r-- | firmware/zpu/lib/clock_bits.h | 55 | ||||
| -rw-r--r-- | firmware/zpu/lib/clocks.c | 174 | ||||
| -rw-r--r-- | firmware/zpu/lib/clocks.h | 71 |
3 files changed, 16 insertions, 284 deletions
diff --git a/firmware/zpu/lib/clock_bits.h b/firmware/zpu/lib/clock_bits.h deleted file mode 100644 index d2052e941..000000000 --- a/firmware/zpu/lib/clock_bits.h +++ /dev/null @@ -1,55 +0,0 @@ -// -// Copyright 2010 Ettus Research LLC -// -/* - * Copyright 2008 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio 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, or (at your option) - * any later version. - * - * GNU Radio 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, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ -#ifndef INCLUDED_USRP2_CLOCK_BITS_H -#define INCLUDED_USRP2_CLOCK_BITS_H - -#define _MC_WE_LOCK 0x0001 -#define _MC_MIMO_CLK_INPUT 0x0002 // else SMA input - -/* - * Derived masks (use these): - * - * We get our input from 1 of three places: - * Our free running oscilator, our SMA connector, or from the MIMO connector - */ -#define MC_WE_DONT_LOCK 0x0000 -#define MC_WE_LOCK_TO_SMA (_MC_WE_LOCK | 0) -#define MC_WE_LOCK_TO_MIMO (_MC_WE_LOCK | _MC_MIMO_CLK_INPUT) - -/* - * Independent of the source of the clock, we may or may not drive our - * clock onto the mimo connector. Note that there are dedicated clock - * signals in each direction, so disaster doesn't occurs if we're - * unnecessarily providing clock. - */ -#define MC_PROVIDE_CLK_TO_MIMO 0x0004 - -#define MC_REF_CLK_MASK 0x0f - -#define MC_PPS_SOURCE_SMA (0x00 << 4) -#define MC_PPS_SOURCE_MIMO (0x01 << 4) - -#define MC_PPS_POLARITY_NEG (0x00 << 5) -#define MC_PPS_POLARITY_POS (0x01 << 5) - -#endif /* INCLUDED_USRP2_CLOCK_BITS_H */ diff --git a/firmware/zpu/lib/clocks.c b/firmware/zpu/lib/clocks.c index 2b352a385..c1e8ce827 100644 --- a/firmware/zpu/lib/clocks.c +++ b/firmware/zpu/lib/clocks.c @@ -1,4 +1,6 @@ -/* -*- c++ -*- */ +// +// Copyright 2010-2011 Ettus Research LLC +// /* * Copyright 2008 Free Software Foundation, Inc. * @@ -16,119 +18,39 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif #include <clocks.h> - +#include <stdbool.h> #include "memory_map.h" #include "ad9510.h" #include "spi.h" -#include "u2_init.h" -//USRP2PLUS clocks: -//Clock 0: testclk -//Clock 1: FPGA clk -//Clock 2: ADC clk -//Clock 3: DAC clk -//Clock 4: SER clk -//Clock 5: TX dboard clk -//Clock 6: EXP clk -//Clock 7: RX dboard clk +/*! + * \brief Lock Detect -- Return True if our PLL is locked + */ +bool clocks_lock_detect(); -//TODO: should have enough brains to init the FPGA clock for USRP2+. all others are suspect. -//note that without EEPROM support u2_hw_rev_major is going to be incorrect. +/*! + * \brief Enable or disable fpga clock. Disabling would wedge and require a power cycle. + */ +void clocks_enable_fpga_clk(bool enable, int divisor); void clocks_init(void) { // Set up basic clocking functions in AD9510 - ad9510_write_reg(0x45, 0x01); // CLK2 drives distribution + ad9510_write_reg(0x45, 0x01); //enable the 100MHz clock output to the FPGA for 50MHz CPU clock clocks_enable_fpga_clk(true, 1); spi_wait(); - // Set up PLL for 10 MHz reference - // Reg 4, A counter, Don't Care -// ad9510_write_reg(0x05, 0x00); // Reg 5, B counter MSBs, 0 -// ad9510_write_reg(0x06, 0x05); // Reg 6, B counter LSBs, 5 - // Reg 7, Loss of reference detect, doesn't work yet, 0 -// ad9510_write_reg(0x5A, 0x01); // Update Regs - - // Primary clock configuration -// clocks_mimo_config(MC_WE_DONT_LOCK); - - //wait for the clock to stabilize while(!clocks_lock_detect()); //issue a reset to the DCM so it locks up to the new freq output_regs->clk_ctrl |= CLK_RESET; - - // Set up other clocks - //clocks_enable_test_clk(false, 0); - //clocks_enable_tx_dboard(false, 0); - //clocks_enable_rx_dboard(false, 0); -// clocks_enable_eth_phyclk(false, 0); //PHY clk is separate now (u2r4, u2p) - - // Enable clock to ADCs and DACs - //clocks_enable_dac_clk(true, 1); - //clocks_enable_adc_clk(true, 1); -} - -/* -void -clocks_mimo_config(int flags) -{ - if (flags & _MC_WE_LOCK){ - // Reg 8, Charge pump on, dig lock det, positive PFD, 47 - ad9510_write_reg(0x08, 0x47); - } - else { - // Reg 8, Charge pump off, dig lock det, positive PFD - ad9510_write_reg(0x08, 0x00); - } - - // Reg 9, Charge pump current, 0x40=3mA, 0x00=650uA - ad9510_write_reg(0x09, 0x00); - // Reg A, Prescaler of 2, everything normal 04 - ad9510_write_reg(0x0A, 0x04); - // Reg B, R Div MSBs, 0 - ad9510_write_reg(0x0B, 0x00); - // Reg C, R Div LSBs, 1 - ad9510_write_reg(0x0C, 0x01); - // Reg D, Antibacklash, Digital lock det, 0 - - ad9510_write_reg(0x5A, 0x01); // Update Regs - - spi_wait(); - - // Allow for clock switchover - // The below masks include 0x10, which issues a reset to the DCM. - if (flags & _MC_WE_LOCK){ // WE LOCK - if (flags & _MC_MIMO_CLK_INPUT) { - // Turn on ref output and choose the MIMO connector - output_regs->clk_ctrl = 0x15; - } - else { - // turn on ref output and choose the SMA - output_regs->clk_ctrl = 0x1C; - } - } - else { // WE DONT LOCK - // Disable both ext clk inputs - output_regs->clk_ctrl = 0x10; - } - - // Do we drive a clock onto the MIMO connector? -// if (flags & MC_PROVIDE_CLK_TO_MIMO) -// clocks_enable_clkexp_out(true,10); -// else -// clocks_enable_clkexp_out(false,0); } -*/ bool clocks_lock_detect() @@ -188,79 +110,9 @@ clocks_enable_XXX_clk(bool enable, int divisor, int reg_en, int reg_div, int mod ad9510_write_reg(0x5A, 0x01); // Update Regs } -// Clock 0 -/*void -clocks_enable_test_clk(bool enable, int divisor) -{ - clocks_enable_XXX_clk(enable,divisor,0x3C,0x48,CLOCK_MODE_PECL); -}*/ - // Clock 1 void clocks_enable_fpga_clk(bool enable, int divisor) { clocks_enable_XXX_clk(enable,divisor,0x3D,0x4A,CLOCK_MODE_PECL); } -/* -// Clock 2 on Rev 3, Clock 5 on Rev 4, Clock 6 on USRP2+ -void -clocks_enable_clkexp_out(bool enable, int divisor) -{ - if(u2_hw_rev_major == 3) - clocks_enable_XXX_clk(enable,divisor,0x3E,0x4C,CLOCK_MODE_PECL); - else if(u2_hw_rev_major == 4) { - ad9510_write_reg(0x34,0x00); // Turn on fine delay - ad9510_write_reg(0x35,0x00); // Set Full Scale to nearly 10ns - ad9510_write_reg(0x36,0x1c); // Set fine delay. 0x20 is midscale - clocks_enable_XXX_clk(enable,divisor,0x41,0x52,CLOCK_MODE_LVDS); - } - else if(u2_hw_rev_major == 10) { - ad9510_write_reg(0x34, 0x00); - ad9510_write_reg(0x35, 0x00); - ad9510_write_reg(0x36, 0x1C); - clocks_enable_XXX_clk(enable, divisor, 0x42, 0x52, CLOCK_MODE_LVDS); - } - else - putstr("ERR (clocks_enable_clkexp_out): Invalid hw rev, don't know what to do!\n"); -} -*/ -/* -// Clock 5 on Rev 3, none (was 2) on Rev 4, none on USRP2+ -void -clocks_enable_eth_phyclk(bool enable, int divisor) -{ - if(u2_hw_rev_major == 3) - clocks_enable_XXX_clk(enable,divisor,0x41,0x52,CLOCK_MODE_LVDS); - else if(u2_hw_rev_major == 4) - clocks_enable_XXX_clk(enable,divisor,0x3E,0x4C,CLOCK_MODE_PECL); - else - putstr("(clocks_enable_eth_phyclk): no eth PHY clock or invalid hw rev\n"); //not really an error -} -*/ -// Clock 3 -/*void -clocks_enable_dac_clk(bool enable, int divisor) -{ - clocks_enable_XXX_clk(enable,divisor,0x3F,0x4E,CLOCK_MODE_PECL); -}*/ - -// Clock 4 -/*void -clocks_enable_adc_clk(bool enable, int divisor) -{ - clocks_enable_XXX_clk(enable,divisor,0x40,0x50,CLOCK_MODE_LVDS); -}*/ - -// Clock 6 -/*void -clocks_enable_tx_dboard(bool enable, int divisor) -{ - clocks_enable_XXX_clk(enable,divisor,0x42,0x54,CLOCK_MODE_CMOS); -}*/ - -// Clock 7 -/*void -clocks_enable_rx_dboard(bool enable, int divisor) -{ - clocks_enable_XXX_clk(enable,divisor,0x43,0x56,CLOCK_MODE_CMOS); -}*/ diff --git a/firmware/zpu/lib/clocks.h b/firmware/zpu/lib/clocks.h index 28d1d542f..7bc7a3cda 100644 --- a/firmware/zpu/lib/clocks.h +++ b/firmware/zpu/lib/clocks.h @@ -1,5 +1,5 @@ // -// Copyright 2010 Ettus Research LLC +// Copyright 2010-2011 Ettus Research LLC // /* * Copyright 2008 Free Software Foundation, Inc. @@ -21,75 +21,10 @@ #ifndef INCLUDED_CLOCKS_H #define INCLUDED_CLOCKS_H -/* - * Routines to configure our multitude of clocks - */ - -#include <stdbool.h> -#include "clock_bits.h" - - /*! - * One time call to initialize all clocks to a reasonable state. We - * come out of here using our free running 100MHz oscilator and not - * providing a clock to the MIMO connector (CMC_WE_DONT_LOCK) + * One time call to initialize the master clock to a reasonable state. + * We come out of here using our free running 100MHz oscillator. */ void clocks_init(void); - -/*! - * \brief MIMO clock configuration. - * - * Configure our master clock source, and whether or not we drive a - * clock onto the mimo connector. See MC_flags in usrp2_mimo_config.h. - */ -//void clocks_mimo_config(int flags); - -/*! - * \brief Lock Detect -- Return True if our PLL is locked - */ -bool clocks_lock_detect(); - -/*! - * \brief Enable or disable test clock (extra clock signal) - */ -//void clocks_enable_test_clk(bool enable, int divisor); - -/*! - * \brief Enable or disable fpga clock. Disabling would wedge and require a power cycle. - */ -void clocks_enable_fpga_clk(bool enable, int divisor); - -/*! - * \brief Enable or disable clock output sent to MIMO connector - */ -//void clocks_enable_clkexp_out(bool enable, int divisor); - -/*! - * \brief Enable or disable ethernet phyclk, should always be disabled - */ -//void clocks_enable_eth_phyclk(bool enable, int divisor); - -/*! - * \brief Enable or disable clock to DAC - */ -//void clocks_enable_dac_clk(bool enable, int divisor); - -/*! - * \brief Enable or disable clock to ADC - */ -//void clocks_enable_adc_clk(bool enable, int divisor); - -/*! - * \brief Enable or disable clock to Rx daughterboard - */ -//void clocks_enable_rx_dboard(bool enable, int divisor); - - -/*! - * \brief Enable or disable clock to Tx daughterboard - */ -//void clocks_enable_tx_dboard(bool enable, int divisor); - - #endif /* INCLUDED_CLOCKS_H */ |