Re: [PATCH 4/5] acpi_init: Add enter_sleep method based on ACPI server

[Samuel Thibault]

Damien Zammit, le jeu. 01 avril 2021 00:23:29 +1100, a ecrit:
> ---
>  libacpica/acpi_init.c    | 43 ++++++++++++++++++++++++++++++++++++++++
>  shutdown/acpi_shutdown.h |  1 +
>  2 files changed, 44 insertions(+)
> 
> diff --git a/libacpica/acpi_init.c b/libacpica/acpi_init.c
> index 754da4be..405ad4e9 100644
> --- a/libacpica/acpi_init.c
> +++ b/libacpica/acpi_init.c
> @@ -13,6 +13,49 @@
>  #include <sys/stat.h>
>  #include <fcntl.h>
>  #include <unistd.h>
> +#include <shutdown/acpi_shutdown.h>
> +
> +acpi_status
> +acpi_os_enter_sleep(u8 sleep_state, u32 pm1a, u32 pm1b)
> +{
> +     uint16_t pm1a_ctl, pm1b_ctl;
> +     uint8_t regbuf[2];
> +     FILE *facp;
> +
> +     /* Open the ACPI FADT table */
> +     facp = fopen(SERVERS_ACPI_FADT, "r");
> +     if (!facp)
> +             return AE_NO_ACPI_TABLES;
> +
> +     /* Grab PM1a Control I/O port */
> +     fseek(facp, PM1A_CTL_OFFSET, SEEK_SET);
> +     fread(regbuf, 2, 1, facp);
> +     pm1a_ctl = (uint16_t)regbuf[0] |
> +                ((uint16_t)regbuf[1] << 8);
> +
> +     /* Grab PM1a Control I/O port */
> +     fseek(facp, PM1B_CTL_OFFSET, SEEK_SET);
> +     fread(regbuf, 2, 1, facp);
> +     pm1b_ctl = (uint16_t)regbuf[0] |
> +                ((uint16_t)regbuf[1] << 8);
> +
> +     /* Close the ACPI FADT table */
> +     fclose(facp);
> +
> +     if (ioperm(pm1a_ctl, 2, 1)) {
> +             fprintf(stderr, "EPERM on ioperm(pm1a_ctl)\n");
> +             return AE_IO_ERROR;
> +     }
> +
> +     if (ioperm(pm1b_ctl, 2, 1)) {
> +             fprintf(stderr, "EPERM on ioperm(pm1b_ctl)\n");
> +             return AE_IO_ERROR;
> +     }
> +
> +     outw(pm1a, pm1a_ctl);
> +     outw(pm1b, pm1b_ctl);

After the outw, clear back ioperm?

> +     return AE_OK;
> +}
>  
>  void
>  acpi_ds_dump_method_stack(acpi_status status, ...)
> diff --git a/shutdown/acpi_shutdown.h b/shutdown/acpi_shutdown.h
> index 50b7f1f6..897fbad3 100644
> --- a/shutdown/acpi_shutdown.h
> +++ b/shutdown/acpi_shutdown.h
> @@ -12,6 +12,7 @@
>  #define SMI_CMD_OFFSET       12
>  #define SMI_EN_OFFSET        16
>  #define PM1A_CTL_OFFSET      28
> +#define PM1B_CTL_OFFSET      32
>  
>  void disappear_via_acpi(void);
>  
> -- 
> 2.30.1
> 
>