diff options
Diffstat (limited to 'src/drivers/genesyslogic/gl9755')
| -rw-r--r-- | src/drivers/genesyslogic/gl9755/gl9755.c | 17 | ||||
| -rw-r--r-- | src/drivers/genesyslogic/gl9755/gl9755.h | 8 |
2 files changed, 21 insertions, 4 deletions
diff --git a/src/drivers/genesyslogic/gl9755/gl9755.c b/src/drivers/genesyslogic/gl9755/gl9755.c index c3cdef11e7..6dfac47293 100644 --- a/src/drivers/genesyslogic/gl9755/gl9755.c +++ b/src/drivers/genesyslogic/gl9755/gl9755.c @@ -10,15 +10,24 @@ #include <device/pci_ids.h> #include "gl9755.h" -static void gl9755_init(struct device *dev) +static void gl9755_enable(struct device *dev) { - printk(BIOS_INFO, "GL9755: init\n"); - pci_dev_init(dev); + uint32_t reg; + + printk(BIOS_INFO, "GL9755: configure ASPM and LTR\n"); /* Set Vendor Config to be configurable */ pci_or_config32(dev, CFG, CFG_EN); + /* Set LTR value */ pci_write_config32(dev, LTR, NO_SNOOP_SCALE|NO_SNOOP_VALUE|SNOOP_SCALE|SNOOP_VALUE); + + /* Adjust L1 exit latency to enable ASPM */ + reg = pci_read_config32(dev, CFG2); + reg &= ~CFG2_LAT_L1_MASK; + reg |= CFG2_LAT_L1_64US; + pci_write_config32(dev, CFG2, reg); + /* Set Vendor Config to be non-configurable */ pci_and_config32(dev, CFG, ~CFG_EN); } @@ -28,7 +37,7 @@ static struct device_operations gl9755_ops = { .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .ops_pci = &pci_dev_ops_pci, - .init = gl9755_init, + .enable = gl9755_enable }; static const unsigned short pci_device_ids[] = { diff --git a/src/drivers/genesyslogic/gl9755/gl9755.h b/src/drivers/genesyslogic/gl9755/gl9755.h index 2d20faf695..aa20a527f2 100644 --- a/src/drivers/genesyslogic/gl9755/gl9755.h +++ b/src/drivers/genesyslogic/gl9755/gl9755.h @@ -1,11 +1,19 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef DRIVERS_GENESYSLOGIC_GL9755_H +#define DRIVERS_GENESYSLOGIC_GL9755_H + /* Definitions for Genesys Logic GL9755 */ #define CFG 0x800 #define CFG_EN 0x1 +#define CFG2 0x48 +#define CFG2_LAT_L1_MASK ((0x7 << 12) | (0x7 << 3)) +#define CFG2_LAT_L1_64US ((0x6 << 12) | (0x6 << 3)) #define LTR 0x5C #define SNOOP_VALUE 0x25 #define SNOOP_SCALE (0x3 << 10) #define NO_SNOOP_VALUE (0x25 << 16) #define NO_SNOOP_SCALE (0x3 << 26) + +#endif /* DRIVERS_GENESYSLOGIC_GL9755_H */ |