summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorGary Jennejohn <garyj@denx.de>2007-08-31 15:21:46 +0200
committerStefan Roese <sr@denx.de>2007-08-31 15:21:46 +0200
commit81b73dec16fd1227369a191e725e10044a9d56b8 (patch)
tree3d0fe0f95120227c7ced28cc3ff742e35d22dd71
parent9c02defc29b57945b600714cf61ddfd02b02fb14 (diff)
downloadu-boot-imx-81b73dec16fd1227369a191e725e10044a9d56b8.zip
u-boot-imx-81b73dec16fd1227369a191e725e10044a9d56b8.tar.gz
u-boot-imx-81b73dec16fd1227369a191e725e10044a9d56b8.tar.bz2
ppc4xx: (Re-)Enable CONFIG_PCI_PNP on AMCC 440EPx Sequoia
The 440EPx has a problem when the PCI_CACHE_LINE_SIZE register is set to non-zero, because it doesn't support MRM (memory-read- multiple) correctly. We now added the possibility to configure this register in the board config file, so that the default value of 8 can be overridden. Here the details of this patch: o drivers_pci_auto.c: introduce CFG_PCI_CACHE_LINE_SIZE to allow board-specific settings. As an example the sequoia board requires 0. Idea from Stefan Roese <sr@denx.de>. o board/amcc/sequoia/init.S: add a TLB mapping at 0xE8000000 for the PCI IO-space. Obtained from Stefan Roese <sr@denx.de>. o include/configs/sequoia.h: turn CONFIG_PCI_PNP back on and set CFG_PCI_CACHE_LINE_SIZE to 0. Signed-off-by: Gary Jennejohn <garyj@denx.de> Signed-off-by: Stefan Roese <sr@denx.de>
-rw-r--r--board/amcc/sequoia/init.S3
-rw-r--r--drivers/pci_auto.c8
-rw-r--r--include/configs/sequoia.h3
3 files changed, 12 insertions, 2 deletions
diff --git a/board/amcc/sequoia/init.S b/board/amcc/sequoia/init.S
index 45bcd4b..5fe3af9 100644
--- a/board/amcc/sequoia/init.S
+++ b/board/amcc/sequoia/init.S
@@ -126,6 +126,9 @@ tlbtab:
/* TLB-entry for peripherals */
tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
+ /* TLB-entry PCI IO Space - from sr@denx.de */
+ tlbentry(0xE8000000, SZ_64K, 0xE8000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
+
tlbtab_end
#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c
index 2378553..acfda83 100644
--- a/drivers/pci_auto.c
+++ b/drivers/pci_auto.c
@@ -28,6 +28,11 @@
#define PCIAUTO_IDE_MODE_MASK 0x05
+/* the user can define CFG_PCI_CACHE_LINE_SIZE to avoid problems */
+#ifndef CFG_PCI_CACHE_LINE_SIZE
+#define CFG_PCI_CACHE_LINE_SIZE 8
+#endif
+
/*
*
*/
@@ -150,7 +155,8 @@ void pciauto_setup_device(struct pci_controller *hose,
}
pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat);
- pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
+ pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE,
+ CFG_PCI_CACHE_LINE_SIZE);
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
}
diff --git a/include/configs/sequoia.h b/include/configs/sequoia.h
index 824a812..c2e1386 100644
--- a/include/configs/sequoia.h
+++ b/include/configs/sequoia.h
@@ -400,7 +400,8 @@
*----------------------------------------------------------------------*/
/* General PCI */
#define CONFIG_PCI /* include pci support */
-#undef CONFIG_PCI_PNP /* do (not) pci plug-and-play */
+#define CONFIG_PCI_PNP /* do pci plug-and-play */
+#define CFG_PCI_CACHE_LINE_SIZE 0 /* to avoid problems with PNP */
#define CONFIG_PCI_SCAN_SHOW /* show pci devices on startup */
#define CFG_PCI_TARGBASE 0x80000000 /* PCIaddr mapped to CFG_PCI_MEMBASE*/