diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2020-10-30 12:56:02 +0100 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2020-11-11 09:20:03 +0000 |
| commit | d00af4fbacfafaed18be571719c06f1f84b61599 (patch) | |
| tree | 96543ff02bcb8b51401859b06e13cb5b2a3f7aac /src/southbridge/intel/lynxpoint | |
| parent | 2f572dd964db1ca475af38d4b8592001dd22ed9e (diff) | |
sb/intel/lynxpoint/sata: Simplify RMW operations
Introduce the `sir_unset_and_set_mask` helper and update the one PCI
read-modify-write operation that is somehow not reproducible.
Change-Id: I30ad6ef8ad97ee0a8dc2297fba5bbbfe24f00f1c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47030
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Diffstat (limited to 'src/southbridge/intel/lynxpoint')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/sata.c | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/src/southbridge/intel/lynxpoint/sata.c b/src/southbridge/intel/lynxpoint/sata.c index c9c7f2cadb..d8eb2a814b 100644 --- a/src/southbridge/intel/lynxpoint/sata.c +++ b/src/southbridge/intel/lynxpoint/sata.c @@ -25,10 +25,17 @@ static inline void sir_write(struct device *dev, int idx, u32 value) pci_write_config32(dev, SATA_SIRD, value); } +static inline void sir_unset_and_set_mask(struct device *dev, int idx, u32 unset, u32 set) +{ + pci_write_config32(dev, SATA_SIRI, idx); + + const u32 value = pci_read_config32(dev, SATA_SIRD) & ~unset; + pci_write_config32(dev, SATA_SIRD, value | set); +} + static void sata_init(struct device *dev) { u32 reg32; - u16 reg16; u32 *abar; @@ -69,10 +76,7 @@ static void sata_init(struct device *dev) pci_write_config32(dev, IDE_CONFIG, reg32); /* for AHCI, Port Enable is managed in memory mapped space */ - reg16 = pci_read_config16(dev, 0x92); - reg16 &= ~0x3f; - reg16 |= 0x8000 | config->sata_port_map; - pci_write_config16(dev, 0x92, reg16); + pci_update_config16(dev, 0x92, ~0x3f, 0x8000 | config->sata_port_map); udelay(2); /* Setup register 98h */ @@ -173,25 +177,16 @@ static void sata_init(struct device *dev) sir_write(dev, 0x64, 0x883c9001); /* Step 2: SIR 68h[15:0] = 880Ah */ - reg32 = sir_read(dev, 0x68); - reg32 &= 0xffff0000; - reg32 |= 0x880a; - sir_write(dev, 0x68, reg32); + sir_unset_and_set_mask(dev, 0x68, 0xffff, 0x880a); /* Step 3: SIR 60h[3] = 1 */ - reg32 = sir_read(dev, 0x60); - reg32 |= (1 << 3); - sir_write(dev, 0x60, reg32); + sir_unset_and_set_mask(dev, 0x60, 0, 1 << 3); /* Step 4: SIR 60h[0] = 1 */ - reg32 = sir_read(dev, 0x60); - reg32 |= (1 << 0); - sir_write(dev, 0x60, reg32); + sir_unset_and_set_mask(dev, 0x60, 0, 1 << 0); /* Step 5: SIR 60h[1] = 1 */ - reg32 = sir_read(dev, 0x60); - reg32 |= (1 << 1); - sir_write(dev, 0x60, reg32); + sir_unset_and_set_mask(dev, 0x60, 0, 1 << 1); /* Clock Gating */ sir_write(dev, 0x70, 0x3f00bf1f); |