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[SPARC64]: Small Schizo PCI controller programming tweaks. 

Use macro instead of magic value for Tomatillo discard-
timeout interrupt enable register bit.

Leave OBP programming PTO value unless Tomatillo and
version >= 0x2.

If no-bus-parking property is present, explicitly clear
PCICTRL_PARK bit.

Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
David S. Miller 2005-07-04 14:53:33 -07:00
parent bb6743f4f0
commit 9fba62a59c
1 changed files with 8 additions and 15 deletions
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23
arch/sparc64/kernel/pci_schizo.c
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@ -933,6 +933,7 @@ static irqreturn_t schizo_ce_intr(int irq, void *dev_id, struct pt_regs *regs)
#define SCHIZO_PCI_CTRL (0x2000UL)
#define SCHIZO_PCICTRL_BUS_UNUS (1UL << 63UL) /* Safari */
#define SCHIZO_PCICTRL_DTO_INT (1UL << 61UL) /* Tomatillo */
#define SCHIZO_PCICTRL_ARB_PRIO (0x1ff << 52UL) /* Tomatillo */
#define SCHIZO_PCICTRL_ESLCK (1UL << 51UL) /* Safari */
#define SCHIZO_PCICTRL_ERRSLOT (7UL << 48UL) /* Safari */
@ -1939,33 +1940,25 @@ static void __init schizo_pbm_hw_init(struct pci_pbm_info *pbm)
schizo_write(pbm->pbm_regs + SCHIZO_PCI_IRQ_RETRY,
SCHIZO_IRQ_RETRY_INF);
/* Enable arbiter for all PCI slots. Also, disable PCI interval
* timer so that DTO (Discard TimeOuts) are not reported because
* some Schizo revisions report them erroneously.
*/
tmp = schizo_read(pbm->pbm_regs + SCHIZO_PCI_CTRL);
if (pbm->chip_type == PBM_CHIP_TYPE_SCHIZO_PLUS &&
pbm->chip_version == 0x5 &&
pbm->chip_revision == 0x1)
tmp |= 0x0f;
else
tmp |= 0xff;
tmp &= ~SCHIZO_PCICTRL_PTO;
/* Enable arbiter for all PCI slots. */
tmp |= 0xff;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
pbm->chip_version >= 0x2)
tmp |= 0x3UL << SCHIZO_PCICTRL_PTO_SHIFT;
else
tmp |= 0x1UL << SCHIZO_PCICTRL_PTO_SHIFT;
if (!prom_getbool(pbm->prom_node, "no-bus-parking"))
tmp |= SCHIZO_PCICTRL_PARK;
else
tmp &= ~SCHIZO_PCICTRL_PARK;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
pbm->chip_version <= 0x1)
tmp |= (1UL << 61);
tmp |= SCHIZO_PCICTRL_DTO_INT;
else
tmp &= ~(1UL << 61);
tmp &= ~SCHIZO_PCICTRL_DTO_INT;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
tmp |= (SCHIZO_PCICTRL_MRM_PREF |