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ada-git-code

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overriding procedure Reset
(This : in out SDMMC_Controller;
Status : out SD_Error)
is
begin
-- Make sure the POWER register is writable by waiting a bit after
-- the Power_Off command
DCTRL_Write_Delay;
This.Periph.POWER.PWRCTRL := Power_Off;
-- Use the Default SDMMC peripheral configuration for SD card init
This.Periph.CLKCR := (others => <>);
This.Set_Clock (400_000);
This.Periph.DTIMER := SD_DATATIMEOUT;
This.Periph.CLKCR.CLKEN := False;
DCTRL_Write_Delay;
This.Periph.POWER.PWRCTRL := Power_On;
-- Wait for the clock to stabilize.
DCTRL_Write_Delay;
This.Periph.CLKCR.CLKEN := True;
delay until Clock + Milliseconds (20);
Status := OK;
end Reset;
---------------
-- Set_Clock --
---------------
overriding procedure Set_Clock
(This : in out SDMMC_Controller;
Freq : Natural)
is
Div : UInt32;
CLKCR : CLKCR_Register;
begin
Div := (This.CLK_In + UInt32 (Freq) - 1) / UInt32 (Freq);
-- Make sure the POWER register is writable by waiting a bit after
-- the Power_Off command
DCTRL_Write_Delay;
if Div <= 1 then
This.Periph.CLKCR.BYPASS := True;
else
Div := Div - 2;
CLKCR := This.Periph.CLKCR;
CLKCR.BYPASS := False;
if Div > UInt32 (CLKCR_CLKDIV_Field'Last) then
CLKCR.CLKDIV := CLKCR_CLKDIV_Field'Last;
else
CLKCR.CLKDIV := CLKCR_CLKDIV_Field (Div);
end if;
This.Periph.CLKCR := CLKCR;
end if;
end Set_Clock;
------------------
-- Set_Bus_Size --
------------------
overriding procedure Set_Bus_Size
(This : in out SDMMC_Controller;
Mode : Wide_Bus_Mode)
is
function To_WIDBUS_Field is new Ada.Unchecked_Conversion
(Wide_Bus_Mode, CLKCR_WIDBUS_Field);
begin
This.Periph.CLKCR.WIDBUS := To_WIDBUS_Field (Mode);
end Set_Bus_Size;
------------------
-- Send_Command --
------------------
overriding procedure Send_Cmd
(This : in out SDMMC_Controller;
Cmd : Cmd_Desc_Type;
Arg : UInt32;
Status : out SD_Error)
is
CMD_Reg : CMD_Register := This.Periph.CMD;
begin
if Cmd.Rsp = Rsp_Invalid or else Cmd.Tfr = Tfr_Invalid then
raise Program_Error with "Not implemented";
end if;
This.Periph.ARG := Arg;
CMD_Reg.CMDINDEX := CMD_CMDINDEX_Field (Cmd.Cmd);
CMD_Reg.WAITRESP := (case Cmd.Rsp is
when Rsp_No => No_Response,
when Rsp_R2 => Long_Response,
when others => Short_Response);