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i2c: piix4: Move SMBus controller base address detect into function

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Move SMBus controller base address detection into function. Refactor
is in preparation for following MMIO changes.

Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Terry Bowman 2022-02-09 11:27:12 -06:00 committed by Wolfram Sang
parent a3325d225b
commit 0a59a24e14
1 changed files with 44 additions and 25 deletions
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69
drivers/i2c/busses/i2c-piix4.c
View File

@ -282,11 +282,51 @@ static int piix4_setup(struct pci_dev *PIIX4_dev,
return piix4_smba;
}
static int piix4_setup_sb800_smba(struct pci_dev *PIIX4_dev,
u8 smb_en,
u8 aux,
u8 *smb_en_status,
unsigned short *piix4_smba)
{
u8 smba_en_lo;
u8 smba_en_hi;
int retval;
retval = piix4_sb800_region_request(&PIIX4_dev->dev);
if (retval)
return retval;
outb_p(smb_en, SB800_PIIX4_SMB_IDX);
smba_en_lo = inb_p(SB800_PIIX4_SMB_IDX + 1);
outb_p(smb_en + 1, SB800_PIIX4_SMB_IDX);
smba_en_hi = inb_p(SB800_PIIX4_SMB_IDX + 1);
piix4_sb800_region_release(&PIIX4_dev->dev);
if (!smb_en) {
*smb_en_status = smba_en_lo & 0x10;
*piix4_smba = smba_en_hi << 8;
if (aux)
*piix4_smba |= 0x20;
} else {
*smb_en_status = smba_en_lo & 0x01;
*piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
}
if (!*smb_en_status) {
dev_err(&PIIX4_dev->dev,
"SMBus Host Controller not enabled!\n");
return -ENODEV;
}
return 0;
}
static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
const struct pci_device_id *id, u8 aux)
{
unsigned short piix4_smba;
u8 smba_en_lo, smba_en_hi, smb_en, smb_en_status, port_sel;
u8 smb_en, smb_en_status, port_sel;
u8 i2ccfg, i2ccfg_offset = 0x10;
int retval;
@ -310,33 +350,12 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
else
smb_en = (aux) ? 0x28 : 0x2c;
retval = piix4_sb800_region_request(&PIIX4_dev->dev);
retval = piix4_setup_sb800_smba(PIIX4_dev, smb_en, aux, &smb_en_status,
&piix4_smba);
if (retval)
return retval;
outb_p(smb_en, SB800_PIIX4_SMB_IDX);
smba_en_lo = inb_p(SB800_PIIX4_SMB_IDX + 1);
outb_p(smb_en + 1, SB800_PIIX4_SMB_IDX);
smba_en_hi = inb_p(SB800_PIIX4_SMB_IDX + 1);
piix4_sb800_region_release(&PIIX4_dev->dev);
if (!smb_en) {
smb_en_status = smba_en_lo & 0x10;
piix4_smba = smba_en_hi << 8;
if (aux)
piix4_smba |= 0x20;
} else {
smb_en_status = smba_en_lo & 0x01;
piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
}
if (!smb_en_status) {
dev_err(&PIIX4_dev->dev,
"SMBus Host Controller not enabled!\n");
return -ENODEV;
}
if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
return -ENODEV;