| Line 1... |
Line 1... |
-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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--
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-- SD/MMC Bootloader
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-- SD/MMC Bootloader
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--
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--
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-- $Id: spi_boot.vhd,v 1.10 2007-08-06 23:31:05 arniml Exp $
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-- $Id: spi_boot.vhd,v 1.11 2007-08-08 00:39:10 arniml Exp $
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--
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--
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-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
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-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
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--
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--
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-- All rights reserved, see COPYING.
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-- All rights reserved, see COPYING.
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--
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--
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| Line 167... |
Line 167... |
signal mmc_cnt_ovfl_s : boolean;
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signal mmc_cnt_ovfl_s : boolean;
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signal mmc_compat_s : boolean;
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signal mmc_compat_s : boolean;
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|
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signal cmd_finished_s : boolean;
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signal cmd_finished_s : boolean;
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|
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signal r1_result_q : std_logic;
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signal r1_illcmd_q,
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r1_idle_q : std_logic;
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signal done_q,
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signal done_q,
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send_cmd12_q : boolean;
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send_cmd12_q : boolean;
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|
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signal en_outs_s,
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signal en_outs_s,
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en_outs_q : boolean;
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en_outs_q : boolean;
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| Line 210... |
Line 211... |
start_q <= '0';
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start_q <= '0';
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done_q <= false;
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done_q <= false;
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send_cmd12_q <= false;
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send_cmd12_q <= false;
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ctrl_fsm_q <= POWER_UP1;
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ctrl_fsm_q <= POWER_UP1;
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cmd_fsm_q <= CMD;
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cmd_fsm_q <= CMD;
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r1_result_q <= '0';
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r1_illcmd_q <= '0';
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r1_idle_q <= '0';
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en_outs_q <= false;
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en_outs_q <= false;
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|
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elsif clk_i'event and clk_i = '1' then
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elsif clk_i'event and clk_i = '1' then
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-- bit counter control
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-- bit counter control
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if spi_clk_rising_q then
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if spi_clk_rising_q then
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| Line 270... |
Line 272... |
-- Extract flags from R1 response
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-- Extract flags from R1 response
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if cmd_fsm_q = R1 then
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if cmd_fsm_q = R1 then
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bit_cnt_v := bit_cnt_q(1 downto 0);
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bit_cnt_v := bit_cnt_q(1 downto 0);
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case bit_cnt_v(1 downto 0) is
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case bit_cnt_v(1 downto 0) is
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when "10" =>
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when "10" =>
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-- always save "Illegal Command" flag
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-- save "Illegal Command" flag
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r1_result_q <= to_X01(spi_data_in_i);
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r1_illcmd_q <= to_X01(spi_data_in_i);
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when "00" =>
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when "00" =>
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-- overwrite with "Idle State" flag when not in CMD55
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-- save "Idle State" flag
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if ctrl_fsm_q /= CMD55 then
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r1_idle_q <= to_X01(spi_data_in_i);
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r1_result_q <= to_X01(spi_data_in_i);
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end if;
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when others =>
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when others =>
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null;
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null;
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end case;
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end case;
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end if;
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end if;
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| Line 455... |
Line 455... |
--
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--
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-- Purpose:
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-- Purpose:
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-- Implements the controller FSM.
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-- Implements the controller FSM.
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--
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--
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ctrl_fsm: process (ctrl_fsm_q,
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ctrl_fsm: process (ctrl_fsm_q,
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cmd_finished_s, r1_result_q,
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cmd_finished_s, r1_illcmd_q, r1_idle_q,
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start_i, start_q, mode_i,
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start_i, start_q, mode_i,
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cfg_init_n_i)
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cfg_init_n_i)
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|
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variable mmc_compat_v : boolean;
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variable mmc_compat_v : boolean;
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| Line 513... |
Line 513... |
when CMD55 =>
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when CMD55 =>
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if sd_init_g = 1 then
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if sd_init_g = 1 then
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|
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mmc_compat_v := true;
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mmc_compat_v := true;
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if cmd_finished_s then
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if cmd_finished_s then
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if r1_result_q = '0' then
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if r1_illcmd_q = '0' then
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-- command accepted, it's an SD card
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-- command accepted, continue with ACMD41
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ctrl_fsm_s <= ACMD41;
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ctrl_fsm_s <= ACMD41;
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else
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else
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-- command rejected, it's an MMC card
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-- command rejected, it's an MMC card
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ctrl_fsm_s <= CMD1;
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ctrl_fsm_s <= CMD1;
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end if;
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end if;
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| Line 533... |
Line 533... |
when ACMD41 =>
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when ACMD41 =>
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if sd_init_g = 1 then
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if sd_init_g = 1 then
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|
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mmc_compat_v := true;
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mmc_compat_v := true;
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if cmd_finished_s then
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if cmd_finished_s then
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if r1_result_q = '0' then
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if r1_illcmd_q = '0' then
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-- ok, that's an SD card
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if r1_idle_q = '0' then
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ctrl_fsm_s <= CMD16;
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ctrl_fsm_s <= CMD16;
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else
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else
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ctrl_fsm_s <= CMD55;
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ctrl_fsm_s <= CMD55;
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end if;
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end if;
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|
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else
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-- command rejected, though it accepted CMD55 -> it's an MMC
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ctrl_fsm_s <= CMD1;
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end if;
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|
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else
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else
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ctrl_fsm_s <= ACMD41;
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ctrl_fsm_s <= ACMD41;
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end if;
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end if;
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|
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end if;
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end if;
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| Line 549... |
Line 557... |
|
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-- Issue CMD1: SEND_OP_COND ---------------------------------------------
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-- Issue CMD1: SEND_OP_COND ---------------------------------------------
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when CMD1 =>
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when CMD1 =>
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mmc_compat_v := true;
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mmc_compat_v := true;
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if cmd_finished_s then
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if cmd_finished_s then
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if r1_result_q = '0' then
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if r1_idle_q = '0' then
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ctrl_fsm_s <= CMD16;
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ctrl_fsm_s <= CMD16;
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else
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else
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ctrl_fsm_s <= CMD1;
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ctrl_fsm_s <= CMD1;
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end if;
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end if;
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else
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else
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| Line 945... |
Line 953... |
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- File History:
|
-- File History:
|
--
|
--
|
-- $Log: not supported by cvs2svn $
|
-- $Log: not supported by cvs2svn $
|
|
-- Revision 1.10 2007/08/06 23:31:05 arniml
|
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-- enlarge set_sel_i input to fill all upper bits of the 32 bit address vector
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--
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-- Revision 1.9 2007/02/25 18:24:12 arniml
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-- Revision 1.9 2007/02/25 18:24:12 arniml
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-- fix type handling of resets
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-- fix type handling of resets
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--
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--
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-- Revision 1.8 2006/09/11 23:03:36 arniml
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-- Revision 1.8 2006/09/11 23:03:36 arniml
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-- disable outputs with reset
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-- disable outputs with reset
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