From 9fba62a59cf1407cd5495f6c61d22d169ca1553f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 4 Jul 2005 14:53:33 -0700 Subject: [PATCH] [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 --- arch/sparc64/kernel/pci_schizo.c | 23 ++++++++--------------- 1 file changed, 8 insertions(+), 15 deletions(-) diff --git a/arch/sparc64/kernel/pci_schizo.c b/arch/sparc64/kernel/pci_schizo.c index 68b1a63a17..f4f68e150d 100644 --- a/arch/sparc64/kernel/pci_schizo.c +++ b/arch/sparc64/kernel/pci_schizo.c @@ -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 | -- 2.39.5