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ECPIX-5: Add basic support

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Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
pull/428/head
Paul Mackerras 2 months ago
parent 14359affbb
commit 166e3f4ab2
4 changed files with 224 additions and 1 deletions
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16
Makefile
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@ -164,7 +164,7 @@ RAM_INIT_FILE ?=hello_world/hello_world.hex
#MEMORY_SIZE=393216
#RAM_INIT_FILE=micropython/firmware.hex

FPGA_TARGET ?= ORANGE-CRAB-0.21
FPGA_TARGET ?= ECPIX-5

clkgen=fpga/clk_gen_ecp5.vhd
toplevel=fpga/top-generic.vhdl
@ -215,6 +215,20 @@ OPENOCD_JTAG_CONFIG=openocd/ecp5-evn.cfg
OPENOCD_DEVICE_CONFIG=openocd/LFE5UM5G-85F.cfg
endif

# ECPIX-5
ifeq ($(FPGA_TARGET), ECPIX-5)
RESET_LOW=true
CLK_INPUT=100000000
CLK_FREQUENCY=50000000
LPF=constraints/ecpix-5.lpf
PACKAGE=CABGA554
NEXTPNR_FLAGS=--um5g-85k --speed 8 --freq 50 --timing-allow-fail --ignore-loops
OPENOCD_JTAG_CONFIG=openocd/ecpix-5.cfg
OPENOCD_DEVICE_CONFIG=openocd/LFE5UM5G-85F.cfg
toplevel=fpga/top-ecpix5.vhdl
dmi_dtm=dmi_dtm_ecp5.vhdl
endif

ifneq ($(litedram_target),)
soc_extra_synth += litedram/extras/litedram-wrapper-l2.vhdl \
litedram/generated/$(litedram_target)/litedram-initmem.vhdl

45
constraints/ecpix-5.lpf
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@ -0,0 +1,45 @@
LOCATE COMP "ext_clk" SITE "K23";
IOBUF PORT "ext_clk" IO_TYPE=LVCMOS33;

LOCATE COMP "ext_rst_n" SITE "N5";
LOCATE COMP "gsrn" SITE "AB1";
IOBUF PORT "ext_rst_n" IO_TYPE=LVCMOS33;
IOBUF PORT "gsrn" IO_TYPE=LVCMOS33;

LOCATE COMP "uart0_txd" SITE "R24";
LOCATE COMP "uart0_rxd" SITE "R26";

IOBUF PORT "uart0_txd" IO_TYPE=LVCMOS33;
IOBUF PORT "uart0_rxd" IO_TYPE=LVCMOS33;

LOCATE COMP "led5_r_n" SITE "T23";
LOCATE COMP "led5_g_n" SITE "R21";
LOCATE COMP "led5_b_n" SITE "T22";

IOBUF PORT "led5_r_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led5_g_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led5_b_n" IO_TYPE=LVCMOS33;

LOCATE COMP "led6_r_n" SITE "U21";
LOCATE COMP "led6_g_n" SITE "W21";
LOCATE COMP "led6_b_n" SITE "T24";

IOBUF PORT "led6_r_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led6_g_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led6_b_n" IO_TYPE=LVCMOS33;

LOCATE COMP "led7_r_n" SITE "K21";
LOCATE COMP "led7_g_n" SITE "K24";
LOCATE COMP "led7_b_n" SITE "M21";

IOBUF PORT "led7_r_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led7_g_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led7_b_n" IO_TYPE=LVCMOS33;

LOCATE COMP "led8_r_n" SITE "P21";
LOCATE COMP "led8_g_n" SITE "R23";
LOCATE COMP "led8_b_n" SITE "P22";

IOBUF PORT "led8_r_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led8_g_n" IO_TYPE=LVCMOS33;
IOBUF PORT "led8_b_n" IO_TYPE=LVCMOS33;

158
fpga/top-ecpix5.vhdl
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@ -0,0 +1,158 @@
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

library work;
use work.wishbone_types.all;

entity toplevel is
generic (
MEMORY_SIZE : integer := 16384;
RAM_INIT_FILE : string := "firmware.hex";
RESET_LOW : boolean := true;
CLK_INPUT : positive := 100000000;
CLK_FREQUENCY : positive := 50000000;
HAS_FPU : boolean := false;
HAS_BTC : boolean := false;
USE_LITEDRAM : boolean := false;
NO_BRAM : boolean := false;
SCLK_STARTUPE2 : boolean := false;
LOG_LENGTH : natural := 0;
UART_IS_16550 : boolean := true;
HAS_UART1 : boolean := false;
USE_LITESDCARD : boolean := false;
ICACHE_NUM_LINES : natural := 64;
NGPIO : natural := 0
);
port(
ext_clk : in std_ulogic;
ext_rst_n : in std_ulogic;
gsrn : in std_ulogic;

-- UART0 signals:
uart0_txd : out std_ulogic;
uart0_rxd : in std_ulogic;

-- LEDs
led5_r_n : out std_ulogic;
led5_g_n : out std_ulogic;
led5_b_n : out std_ulogic;
led6_r_n : out std_ulogic;
led6_g_n : out std_ulogic;
led6_b_n : out std_ulogic;
led7_r_n : out std_ulogic;
led7_g_n : out std_ulogic;
led7_b_n : out std_ulogic;
led8_r_n : out std_ulogic;
led8_g_n : out std_ulogic;
led8_b_n : out std_ulogic

);
end entity toplevel;

architecture behaviour of toplevel is

-- Reset signals:
signal soc_rst : std_ulogic;
signal pll_rst : std_ulogic;

-- Internal clock signals:
signal system_clk : std_ulogic;
signal system_clk_locked : std_ulogic;

-- Fixup various memory sizes based on generics
function get_bram_size return natural is
begin
if USE_LITEDRAM and NO_BRAM then
return 0;
else
return MEMORY_SIZE;
end if;
end function;

function get_payload_size return natural is
begin
if USE_LITEDRAM and NO_BRAM then
return MEMORY_SIZE;
else
return 0;
end if;
end function;

constant BRAM_SIZE : natural := get_bram_size;
constant PAYLOAD_SIZE : natural := get_payload_size;

begin

-- Main SoC
soc0: entity work.soc
generic map(
MEMORY_SIZE => BRAM_SIZE,
RAM_INIT_FILE => RAM_INIT_FILE,
SIM => false,
CLK_FREQ => CLK_FREQUENCY,
HAS_FPU => HAS_FPU,
HAS_BTC => HAS_BTC,
HAS_DRAM => USE_LITEDRAM,
DRAM_SIZE => 512 * 1024 * 1024,
DRAM_INIT_SIZE => PAYLOAD_SIZE,
HAS_SPI_FLASH => false,
LOG_LENGTH => LOG_LENGTH,
UART0_IS_16550 => UART_IS_16550,
HAS_UART1 => HAS_UART1,
HAS_SD_CARD => USE_LITESDCARD,
ICACHE_NUM_LINES => ICACHE_NUM_LINES,
NGPIO => NGPIO
)
port map (
-- System signals
system_clk => system_clk,
rst => soc_rst,

-- UART signals
uart0_txd => uart0_txd,
uart0_rxd => uart0_rxd
);

nodram: if not USE_LITEDRAM generate
signal div2 : std_ulogic := '0';
begin
reset_controller: entity work.soc_reset
generic map(
RESET_LOW => RESET_LOW
)
port map(
ext_clk => ext_clk,
pll_clk => system_clk,
pll_locked_in => system_clk_locked,
ext_rst_in => ext_rst_n and gsrn,
pll_rst_out => pll_rst,
rst_out => soc_rst
);

process(ext_clk)
begin
if rising_edge(ext_clk) then
div2 <= not div2;
end if;
end process;
system_clk <= div2;
system_clk_locked <= '1';

end generate;

led5_r_n <= '0';
led5_g_n <= '1';
led5_b_n <= '1';
led6_r_n <= '1';
led6_g_n <= '0';
led6_b_n <= '1';
led7_r_n <= '1';
led7_g_n <= '1';
led7_b_n <= '0';
led8_r_n <= '1';
led8_g_n <= '1';
led8_b_n <= '1';

end architecture behaviour;

6
openocd/ecpix-5.cfg
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@ -0,0 +1,6 @@
adapter driver ftdi
ftdi vid_pid 0x0403 0x6011
ftdi channel 0
ftdi layout_init 0xfff8 0xfffb
reset_config none
adapter speed 25000
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