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Commit f81326a9 authored by Andrey Filippov's avatar Andrey Filippov
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Continue on AHCI implementation - started FIS transmit

parent ce85dcb3
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utils/ahci_fis_receive.v
View file @ f81326a9
......@@ -43,14 +43,21 @@ module ahci_fis_receive#(
input get_sdbfis,
input get_ufis,
input get_data_fis,
input get_ignore, // ignore whatever FIS data in the
input get_ignore, // ignore whatever FIS (use for DMA activate too?)
output reg get_fis_busy, // busy processing FIS
output reg fis_first_vld, // fis_first contains valid FIS header, reset by get_*
output reg fis_ok, // FIS done, checksum OK reset by starting a new get FIS
output reg fis_err, // FIS done, checksum ERROR reset by starting a new get FIS
output fis_ferr, // FIS done, fatal error - FIS too long
input update_err_sts,// update PxTFD.STS and PxTFD.ERR from the last received regs d2h
input clear_bsy_drq, // clear PxTFD.STS.BSY and PxTFD.STS.DRQ, update
input set_bsy, // set PxTFD.STS.BSY, update
input set_sts_7f, // set PxTFD.STS = 0x7f, update
input set_sts_80, // set PxTFD.STS = 0x80 (may be combined with set_sts_7f), update
// TODO: Add writing PRDBC here?
output [7:0] tfd_sts, // Current PxTFD status field (updated after regFIS and SDB - certain fields)
// tfd_sts[7] - BSY, tfd_sts[4] - DRQ, tfd_sts[0] - ERR
output [7:0] tfd_err, // Current PxTFD error field (updated after regFIS and SDB)
output reg fis_i, // value of "I" field in received regsD2H or SDB FIS
output reg sdb_n, // value of "N" field in received SDB FIS
......@@ -86,6 +93,8 @@ CLB_OFFS = 0x800 # In the second half of the register space (0x800..0xbff - 1KB)
FB_OFFS = 0xc00 # Needs 0x100 bytes
#HBA_PORT0 = 0x100 Not needed, always HBA_OFFS + 0x100
*/
localparam HBA_OFFS32 = 0;
localparam HBA_PORT0_OFFS32 = 'h40;
......@@ -147,6 +156,7 @@ localparam DATA_TYPE_ERR = 3;
reg [15:0] tf_err_sts;
reg update_err_sts_r;
// Forward data to DMA (dev->mem) engine
assign dma_in_valid = dma_in_ready && (hda_data_in_type == DATA_TYPE_DMA) && data_in_ready && !too_long_err;
......@@ -162,8 +172,6 @@ localparam DATA_TYPE_ERR = 3;
assign tfd_sts = tf_err_sts[ 7:0];
assign tfd_err = tf_err_sts[15:8];
always @ (posedge mclk) begin
if (hba_rst || dma_in_stop) dma_in <= 0;
......@@ -237,29 +245,36 @@ localparam DATA_TYPE_ERR = 3;
if (hba_rst || get_fis) fis_err <= 0;
else if (fis_end_w) fis_err <= hda_data_in_type != DATA_TYPE_OK;
if (reg_we_w) reg_data[31:8] <= hda_data_in[31:8];
else if (update_sig[1]) reg_data[31:8] <= hda_data_in[23:0];
else if (update_err_sts) reg_data[31:8] <= {16'b0,tf_err_sts[15:8]};
if (reg_we_w) reg_data[31:8] <= hda_data_in[31:8];
else if (update_sig[1]) reg_data[31:8] <= hda_data_in[23:0];
else if (update_err_sts_r) reg_data[31:8] <= {16'b0,tf_err_sts[15:8]};
if (reg_we_w) reg_data[ 7:0] <= hda_data_in[ 7:0];
else if (update_sig[3]) reg_data[ 7:0] <= hda_data_in[ 7:0];
else if (update_err_sts) reg_data[ 7:0] <= tf_err_sts [ 7:0];
if (reg_we_w) reg_data[ 7:0] <= hda_data_in[ 7:0];
else if (update_sig[3]) reg_data[ 7:0] <= hda_data_in[ 7:0];
else if (update_err_sts_r) reg_data[ 7:0] <= tf_err_sts [ 7:0];
if (reg_d2h || update_sig[0]) tf_err_sts <= hda_data_in[15:0];
else if (reg_sdb) tf_err_sts <= {hda_data_in[15:8], tf_err_sts[7], hda_data_in[6:4], tf_err_sts[3],hda_data_in[2:0]};
else if (clear_bsy_drq || set_bsy) tf_err_sts <= tf_err_sts & {8'hff,clear_bsy_drq,3'h7,clear_bsy_drq,3'h7} | {8'h0,set_bsy,7'h0};
else if (set_sts_7f || set_sts_80) tf_err_sts <= {tf_err_sts[15:8],set_sts_80,{7{set_sts_7f}}} ;
if (reg_d2h || update_sig[0]) tf_err_sts <= hda_data_in[15:0];
else if (reg_sdb) tf_err_sts <= {hda_data_in[15:8], tf_err_sts[7], hda_data_in[6:4], tf_err_sts[3],hda_data_in[2:0]};
reg_we <= reg_we_w || update_sig[3] || update_err_sts_r;
reg_we <= reg_we_w || update_sig[3] || update_err_sts;
if (reg_we_w || update_sig[3]) reg_addr <= reg_addr_r;
else if (update_err_sts) reg_addr <= PXTFD_OFFS32;
if (reg_we_w || update_sig[3]) reg_addr <= reg_addr_r;
else if (update_err_sts_r) reg_addr <= PXTFD_OFFS32;
if (reg_d2h || reg_sdb || reg_ds[0]) fis_i <= hda_data_in[14];
if (reg_sdb) sdb_n <= hda_data_in[15];
if (reg_ds[0]) {dma_a,dma_d} <= {hda_data_in[15],hda_data_in[13]};
if (reg_d2h || reg_sdb || reg_ds[0]) fis_i <= hda_data_in[14];
if (reg_sdb) sdb_n <= hda_data_in[15];
if (reg_ds[0]) {dma_a,dma_d} <= {hda_data_in[15],hda_data_in[13]};
if (reg_ps[0]) {pio_i,pio_d} <= {hda_data_in[14],hda_data_in[13]};
if (reg_ps[3]) pio_es <= hda_data_in[31:24];
if (reg_ps[0]) {pio_i,pio_d} <= {hda_data_in[14],hda_data_in[13]};
if (hba_rst) pio_es <= 0;
else if (reg_ps[3]) pio_es <= hda_data_in[31:24];
if (reg_ps[4] || reg_ds[5]) xfer_cntr[31:1] <= {reg_ds[5]?hda_data_in[31:16]:16'b0,hda_data_in[15:1]};
if (reg_ps[4] || reg_ds[5]) xfer_cntr[31:1] <= {reg_ds[5]?hda_data_in[31:16]:16'b0,hda_data_in[15:1]};
update_err_sts_r <= update_err_sts || clear_bsy_drq || set_bsy || set_sts_7f || set_sts_80;
end
......
utils/ahci_fis_transmit.v 0 → 100644
View file @ f81326a9
/*******************************************************************************
* Module: ahci_fis_transmit
* Date:2016-01-07
* Author: andrey
* Description: Fetches commands, command tables, creates/sends FIS
*
* Copyright (c) 2016 Elphel, Inc .
* ahci_fis_transmit.v 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.
*
* ahci_fis_transmit.v 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/> .
*******************************************************************************/
`timescale 1ns/1ps
module ahci_fis_transmit #(
parameter READ_REG_LATENCY = 2 // 0 if reg_rdata is available with reg_re/reg_addr
)(
input hba_rst, // @posedge mclk - sync reset
input mclk, // for command/status
input fetch_chead, // fetch command header (from the register memory
output [15:0] ch_prdtl, // Physical region descriptor table length (in entries, 0 is 0)
output ch_c, // Clear busy upon R_OK for this FIS
output ch_b, // Built-in self test command
output ch_r, // reset - may need to send SYNC escape before this command
output ch_p, // prefetchable - only used with non-zero PRDTL or ATAPI bit set
output ch_w, // Write: system memory -> device
output ch_a, // ATAPI: 1 means device should send PIO setup FIS for ATAPI command
output [4:0] ch_cfl, // length of the command FIS in DW, 0 means none. 0 and 1 - illegal,
// maximal is 16 (0x10)
output [31:7] ch_ctba, // command table base address
// register memory interface
output reg [ADDRESS_BITS-1:0] reg_addr,
output reg_re,
output reg [31:0] reg_rdata,
// DMA (memory -> device) interface
input [31:0] dma_out, // 32-bit data from the DMA module, HBA -> device port
input dma_dav, // at least one dword is ready to be read from DMA module
input dma_re, // read dword from DMA module to the outpu register
// Data System memory or FIS -> device
output reg [31:0] todev_data, // 32-bit data from the system memory to HBA (dma data)
output reg [ 1:0] todev_type, // 0 - data, 1 - FIS head, 2 - FIS END (make FIS_Last?)
output todev_valid, // output register full
input todev_ready // send FIFO has room for data (>= ? dwords)
// Add a possiblity to flush any data to FIFO if error was detected after data went there?
);
localparam CLB_OFFS32 = 'h200; // # In the second half of the register space (0x800..0xbff - 1KB)
reg todev_full_r;
reg dma_en_r;
wire fis_data_valid;
wire [1:0] fis_data_type;
wire [31:0] fis_data_out;
wire write_or_w = (dma_en_r?dma_dav:fis_data_valid) && todev_ready; // do not fill the buffer if FIFO is not ready
wire fis_out_w = !dma_en_r && fis_data_valid && todev_ready;
wire dma_re_w = dma_en_r && dma_dav && todev_ready;
reg [15:0] ch_prdtl_r;
reg ch_c_r;
reg ch_b_r;
reg ch_r_r;
reg ch_p_r;
reg ch_w_r;
reg ch_a_r;
reg [4:0] ch_cfl_r;
reg [31:7] ch_ctba_r;
reg [READ_REG_LATENCY:0] reg_re_r;
wire reg_re_w; // combined conditions to read register memory
wire reg_stb = reg_re_r[READ_REG_LATENCY];
wire pre_reg_stb = reg_re_r[READ_REG_LATENCY-1];
reg [3:0] fetch_chead_r;
reg [2:0] fetch_chead_stb_r;
reg chead_bsy; // busy reading command header
reg chead_bsy_re; // busy sending read command header
assign todev_valid = todev_full_r;
assign dma_re = dma_re_w;
assign reg_re = reg_re_r[0];
assign ch_prdtl = ch_prdtl_r;
assign ch_c = ch_c_r;
assign ch_b = ch_b_r;
assign ch_r = ch_r_r;
assign ch_p = ch_p_r;
assign ch_w = ch_w_r;
assign ch_a = ch_a_r;
assign ch_cfl = ch_cfl_r;
assign ch_ctba = ch_ctba_r[31:7];
assign reg_re_w = fetch_chead || chead_bsy_re;
always @ (posedge mclk) begin
// Mutliplex between DMA and FIS output to the output routed to transmit FIFO
// Count bypassing DMA dwords to generate FIS_last condition?
if (hba_rst) todev_full_r <= 0;
else if (write_or_w) todev_full_r <= 1; // do not fill the buffer if FIFO is not ready
else if (todev_ready) todev_full_r <= 0;
if (write_or_w) todev_data <= dma_en_r? dma_out: fis_data_out;
if (hba_rst) todev_type <= 3; // invalid?
else if (write_or_w) todev_type <= dma_en_r? 2'h0 : fis_data_type;
if (hba_rst) fetch_chead_r <= 0;
else if (fetch_chead) fetch_chead_r <= 1;
else fetch_chead_r <= fetch_chead_r << 1;
if (hba_rst) fetch_chead_stb_r <= 0;
else if (pre_reg_stb && chead_bsy) fetch_chead_stb_r <= 1;
else fetch_chead_stb_r <= fetch_chead_stb_r << 1;
if (hba_rst) chead_bsy <= 0;
else if (fetch_chead) chead_bsy <= 1;
else if (fetch_chead_stb_r[2]) chead_bsy <= 0;
if (hba_rst) chead_bsy_re <= 0;
else if (fetch_chead) chead_bsy_re <= 1;
else if (fetch_chead_r[1]) chead_bsy_re <= 0; // read 3 dwords
if (hba_rst) reg_re_r <= 0;
else if (reg_re_w) reg_re_r <= 1;
else reg_re_r <= reg_re_r << 1;
if (fetch_chead) reg_addr <= CLB_OFFS32; // there will be more conditions
else if (reg_re_r[0]) reg_addr <= reg_addr + 1;
// save command header data to registers
if (fetch_chead_stb_r[0]) begin
ch_prdtl_r <= reg_rdata[31:16];
ch_c_r <= reg_rdata[ 10];
ch_b_r <= reg_rdata[ 9];
ch_r_r <= reg_rdata[ 8];
ch_p_r <= reg_rdata[ 7];
ch_w_r <= reg_rdata[ 6];
ch_a_r <= reg_rdata[ 5];
ch_cfl_r <= reg_rdata[ 4: 0];
end
if (fetch_chead_stb_r[2]) ch_ctba_r[31:7] <= reg_rdata[31:7];
/*
reg [3:0] fetch_chead_r;
reg [3:0] fetch_chead_stb_r;
reg chead_bsy; // busy reading command header
*/
end
endmodule
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