From 71adbfc874517efbba8b9f7c3f90baad0d7fb707 Mon Sep 17 00:00:00 2001 From: Stuart Bennett Date: Thu, 3 Jan 2008 16:57:55 +0000 Subject: [PATCH] nouveau: reset AGP on init for < nv40 This is necessary for AGP to work after running bios init scripts on nv3x, and is seen in mmio traces of all cards (nv04-nv4x) I'm not making the equivalent change to nv40_mc.c, as early cards (6200, 6800gt) use the 0x000018XX PBUS and later cards use the 0x000880XX PBUS and I don't know the effects of using the wrong one --- shared-core/nouveau_reg.h | 3 +++ shared-core/nv04_mc.c | 13 +++++++++++++ 2 files changed, 16 insertions(+) (limited to 'shared-core') diff --git a/shared-core/nouveau_reg.h b/shared-core/nouveau_reg.h index 7ac02f4a..a2506146 100644 --- a/shared-core/nouveau_reg.h +++ b/shared-core/nouveau_reg.h @@ -112,6 +112,9 @@ #define NV50_PUNK_BAR3_CTXDMA_VALID (1<<31) #define NV50_PUNK_UNK1710 0x00001710 +#define NV04_PBUS_PCI_NV_1 0x00001804 +#define NV04_PBUS_PCI_NV_19 0x0000184C + #define NV04_PTIMER_INTR_0 0x00009100 #define NV04_PTIMER_INTR_EN_0 0x00009140 #define NV04_PTIMER_NUMERATOR 0x00009200 diff --git a/shared-core/nv04_mc.c b/shared-core/nv04_mc.c index 24c1f7b3..a6a2045d 100644 --- a/shared-core/nv04_mc.c +++ b/shared-core/nv04_mc.c @@ -7,12 +7,25 @@ int nv04_mc_init(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; + uint32_t saved_pci_nv_1, saved_pci_nv_19; + + saved_pci_nv_1 = NV_READ(NV04_PBUS_PCI_NV_1); + saved_pci_nv_19 = NV_READ(NV04_PBUS_PCI_NV_19); + + /* clear busmaster bit */ + NV_WRITE(NV04_PBUS_PCI_NV_1, saved_pci_nv_1 & ~(0x00000001 << 2)); + /* clear SBA, AGP and FW bits */ + NV_WRITE(NV04_PBUS_PCI_NV_19, saved_pci_nv_19 & 0xfffff00f); /* Power up everything, resetting each individual unit will * be done later if needed. */ NV_WRITE(NV03_PMC_ENABLE, 0xFFFFFFFF); + /* and restore (gives effect of resetting AGP) */ + NV_WRITE(NV04_PBUS_PCI_NV_19, saved_pci_nv_19); + NV_WRITE(NV04_PBUS_PCI_NV_1, saved_pci_nv_1); + return 0; } -- cgit v1.2.3