From e1eca1d91cf05b8769e830b5ab59060a0ad5ff0c Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Sat, 1 Dec 2018 17:14:35 -0800 Subject: acpi_pld: Make it easier to define the ACPI USB device groups The Linux kernel can use the ACPI _PLD group information to determine peer ports. Currently to define the group information the devicetree must provide a complete _PLD structure. This change pulls the group information into a separate structure that can be defined in devicetree. This makes it easier to set for USB devices in devicetree that do not need a full custom PLD. This was tested on a sarien board with the USB devices defined by verifying that the USB 2/3 ports are correctly identified with their peer in sysfs. Change-Id: Ifd4cadf0f6c901eb3832ad4e1395904f99c2f5a0 Signed-off-by: Duncan Laurie Reviewed-on: https://review.coreboot.org/c/29998 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/arch/x86/acpi_pld.c | 17 ++++++++++------- src/arch/x86/include/arch/acpi_pld.h | 19 +++++++++++++++---- src/drivers/usb/acpi/chip.h | 8 +++++++- src/drivers/usb/acpi/usb_acpi.c | 2 +- 4 files changed, 33 insertions(+), 13 deletions(-) diff --git a/src/arch/x86/acpi_pld.c b/src/arch/x86/acpi_pld.c index d399ea69dd..904e9f777f 100644 --- a/src/arch/x86/acpi_pld.c +++ b/src/arch/x86/acpi_pld.c @@ -18,7 +18,8 @@ #include #include -int acpi_pld_fill_usb(struct acpi_pld *pld, enum acpi_upc_type type) +int acpi_pld_fill_usb(struct acpi_pld *pld, enum acpi_upc_type type, + struct acpi_pld_group *group) { if (!pld) return -1; @@ -32,6 +33,8 @@ int acpi_pld_fill_usb(struct acpi_pld *pld, enum acpi_upc_type type) pld->horizontal_position = PLD_HORIZONTAL_POSITION_CENTER; pld->rotation = PLD_ROTATE_0; pld->visible = 1; + pld->group.token = group->token; + pld->group.position = group->position; /* Set the shape based on port type */ switch (type) { @@ -114,16 +117,16 @@ int acpi_pld_to_buffer(const struct acpi_pld *pld, uint8_t *buf, int buf_len) /* [77:74] Shape */ buf[9] |= (pld->shape & 0xf) << 2; - /* [78] Group Orientation */ - buf[9] |= (pld->group_orientation & 0x1) << 6; + /* [78] Orientation */ + buf[9] |= (pld->orientation & 0x1) << 6; /* [86:79] Group Token (incorrectly defined as 1 bit in ACPI 6.2A) */ - buf[9] |= (pld->group_token & 0x1) << 7; - buf[10] |= (pld->group_token >> 0x1) & 0x7f; + buf[9] |= (pld->group.token & 0x1) << 7; + buf[10] |= (pld->group.token >> 0x1) & 0x7f; /* [94:87] Group Position */ - buf[10] |= (pld->group_position & 0x1) << 7; - buf[11] |= (pld->group_position >> 0x1) & 0x7f; + buf[10] |= (pld->group.position & 0x1) << 7; + buf[11] |= (pld->group.position >> 0x1) & 0x7f; /* [95] Bay */ buf[11] |= (pld->bay & 0x1) << 7; diff --git a/src/arch/x86/include/arch/acpi_pld.h b/src/arch/x86/include/arch/acpi_pld.h index ce279a00d5..1b4417d2da 100644 --- a/src/arch/x86/include/arch/acpi_pld.h +++ b/src/arch/x86/include/arch/acpi_pld.h @@ -75,6 +75,17 @@ enum acpi_pld_rotate { PLD_ROTATE_315 }; +#define ACPI_PLD_GROUP(__token, __position) \ + { \ + .token = __token, \ + .position = __position, \ + } + +struct acpi_pld_group { + uint8_t token; + uint8_t position; +}; + struct acpi_pld { /* Color field can be explicitly ignored */ bool ignore_color; @@ -100,9 +111,8 @@ struct acpi_pld { enum acpi_pld_rotate rotation; /* Port grouping */ - enum acpi_pld_orientation group_orientation; - uint8_t group_token; - uint8_t group_position; + enum acpi_pld_orientation orientation; + struct acpi_pld_group group; uint8_t draw_order; uint8_t cabinet_number; uint8_t card_cage_number; @@ -112,7 +122,8 @@ struct acpi_pld { }; /* Fill out PLD structure with defaults based on USB port type */ -int acpi_pld_fill_usb(struct acpi_pld *pld, enum acpi_upc_type type); +int acpi_pld_fill_usb(struct acpi_pld *pld, enum acpi_upc_type type, + struct acpi_pld_group *group); /* Turn PLD structure into a 20 byte ACPI buffer */ int acpi_pld_to_buffer(const struct acpi_pld *pld, uint8_t *buf, int buf_len); diff --git a/src/drivers/usb/acpi/chip.h b/src/drivers/usb/acpi/chip.h index 6429f13630..512893d207 100644 --- a/src/drivers/usb/acpi/chip.h +++ b/src/drivers/usb/acpi/chip.h @@ -46,7 +46,13 @@ struct drivers_usb_acpi_config { */ enum acpi_upc_type type; - /* Define a custom physical location for the port */ + /* Group peer ports */ + struct acpi_pld_group group; + + /* + * Define a custom physical location for the port. + * If enabled, this takes precedence over the 'group' field. + */ bool use_custom_pld; struct acpi_pld custom_pld; diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c index f049e68c22..abc1718eb9 100644 --- a/src/drivers/usb/acpi/usb_acpi.c +++ b/src/drivers/usb/acpi/usb_acpi.c @@ -57,7 +57,7 @@ static void usb_acpi_fill_ssdt_generator(struct device *dev) } else { /* Fill PLD strucutre based on port type */ struct acpi_pld pld; - acpi_pld_fill_usb(&pld, config->type); + acpi_pld_fill_usb(&pld, config->type, &config->group); acpigen_write_pld(&pld); } -- cgit v1.2.3