diff options
| author | Alan Huang <alan-huang@quanta.corp-partner.google.com> | 2022-01-18 11:39:05 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-02-14 16:12:07 +0000 |
| commit | ad90edc3e07ea98e7660d25faadab169fbc74479 (patch) | |
| tree | 6991791a603d33e5d72655bef4d35d739d9d1644 /src/drivers/net | |
| parent | 28894c57988076688395c8a122d79640a3702d1a (diff) | |
drivers/net/r8168: Add ASPM control mechanism
Add a new configuration parameter "enable_aspm_l1_2".
Write value 0xe059000f to register offset 0xb0 to allow kernel driver to
enable ASPM L1.2.
Use Kconfig "PCIEXP_ASPM" and "enable_aspm_l1_2" to decide whether to
enable ASPM L1.2.
BUG=b:204309459
TEST=emerge and test if the driver can read the correct value
Change-Id: I944dbf04d3ca19df4de224540bee538bff4d1f12
Signed-off-by: Alan Huang <alan-huang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61267
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/drivers/net')
| -rw-r--r-- | src/drivers/net/chip.h | 3 | ||||
| -rw-r--r-- | src/drivers/net/r8168.c | 20 |
2 files changed, 23 insertions, 0 deletions
diff --git a/src/drivers/net/chip.h b/src/drivers/net/chip.h index a4ba8afc53..f253cae005 100644 --- a/src/drivers/net/chip.h +++ b/src/drivers/net/chip.h @@ -31,6 +31,9 @@ struct drivers_net_config { * the device number is and the valid range is [1-10]. */ uint8_t device_index; + + /* Allow kernel driver to enable ASPM L1.2. */ + bool enable_aspm_l1_2; }; #endif /* __DRIVERS_R8168_CHIP_H__ */ diff --git a/src/drivers/net/r8168.c b/src/drivers/net/r8168.c index 51d4fcb0ab..3432249f8a 100644 --- a/src/drivers/net/r8168.c +++ b/src/drivers/net/r8168.c @@ -36,6 +36,8 @@ #define CFG_9346 0x50 #define CFG_9346_LOCK 0x00 #define CFG_9346_UNLOCK 0xc0 +#define CMD_REG_ASPM 0xb0 +#define ASPM_L1_2_MASK 0xe059000f #define DEVICE_INDEX_BYTE 12 #define MAX_DEVICE_SUPPORT 10 @@ -244,6 +246,20 @@ static void program_mac_address(struct device *dev, u16 io_base) printk(BIOS_DEBUG, "done\n"); } +static void enable_aspm_l1_2(u16 io_base) +{ + printk(BIOS_INFO, "rtl: Enable ASPM L1.2\n"); + + /* Disable register protection */ + outb(CFG_9346_UNLOCK, io_base + CFG_9346); + + /* Enable ASPM_L1.2 */ + outl(ASPM_L1_2_MASK, io_base + CMD_REG_ASPM); + + /* Lock config regs */ + outb(CFG_9346_LOCK, io_base + CFG_9346); +} + static void r8168_set_customized_led(struct device *dev, u16 io_base) { struct drivers_net_config *config = dev->chip_info; @@ -338,6 +354,10 @@ static void r8168_init(struct device *dev) /* Program customized LED mode */ if (CONFIG(RT8168_SET_LED_MODE)) r8168_set_customized_led(dev, io_base); + + struct drivers_net_config *config = dev->chip_info; + if (CONFIG(PCIEXP_ASPM) && config->enable_aspm_l1_2) + enable_aspm_l1_2(io_base); } #if CONFIG(HAVE_ACPI_TABLES) |