diff options
Diffstat (limited to 'board/jse/host_bridge.c')
| -rw-r--r-- | board/jse/host_bridge.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/board/jse/host_bridge.c b/board/jse/host_bridge.c deleted file mode 100644 index 76c07b0c35..0000000000 --- a/board/jse/host_bridge.c +++ /dev/null @@ -1,77 +0,0 @@ -/* - * Copyright (c) 2004 Picture Elements, Inc. - * Stephen Williams (steve@icarus.com) - * - * SPDX-License-Identifier: GPL-2.0+ - */ -#ident "$Id:$" - -# include <common.h> -# include <pci.h> -# include "jse_priv.h" - -/* - * The JSE board has an Intel 21555 non-transparent bridge for - * communication with the host. We need to render it harmless on the - * JSE side, but leave it alone on the host (primary) side. Normally, - * this will all be done before the host BIOS can gain access to the - * board, due to the Primary Access Lockout bit. - * - * The host_bridge_init function is called as a late initialization - * function, after most of the board is set up, including a PCI scan. - */ - -void host_bridge_init (void) -{ - /* The bridge chip is at a fixed location. */ - pci_dev_t dev = PCI_BDF (0, 10, 0); - - /* Set PCI Class code -- - The primary side sees this class code at 0x08 in the - primary config space. This must be something other then a - bridge, or MS Windows starts doing weird stuff to me. */ - pci_write_config_dword (dev, 0x48, 0x04800000); - - /* Set subsystem ID -- - The primary side sees this value at 0x2c. We set it here so - that the host can tell what sort of device this is: - We are a Picture Elements [0x12c5] JSE [0x008a]. */ - pci_write_config_dword (dev, 0x6c, 0x008a12c5); - - /* Downstream (Primary-to-Secondary) BARs are set up mostly - off. We need only the Memory-0 Bar so that the host can get - at the CSR region to set up tables and the lot. */ - - /* Downstream Memory 0 setup (4K for CSR) */ - pci_write_config_dword (dev, 0xac, 0xfffff000); - /* Downstream Memory 1 setup (off) */ - pci_write_config_dword (dev, 0xb0, 0x00000000); - /* Downstream Memory 2 setup (off) */ - pci_write_config_dword (dev, 0xb4, 0x00000000); - /* Downstream Memory 3 setup (off) */ - pci_write_config_dword (dev, 0xb8, 0x00000000); - - /* Upstream (Secondary-to-Primary) BARs are used to get at - host memory from the JSE card. Create two regions: a small - one to manage individual word reads/writes, and a larger - one for doing bulk frame moves. */ - - /* Upstream Memory 0 Setup -- (BAR2) 4K non-prefetchable */ - pci_write_config_dword (dev, 0xc4, 0xfffff000); - /* Upstream Memory 1 setup -- (BAR3) 4K non-prefetchable */ - pci_write_config_dword (dev, 0xc8, 0xfffff000); - - /* Upstream Memory 2 (BAR4) uses page translation, and is set - up in CCR1. Configure for 4K pages. */ - - /* Set CCR1,0 reigsters. This clears the Primary PCI Lockout - bit as well, so we are done configuring after this - point. Therefore, this must be the last step. - - CC1[15:12]= 0 (disable I2O message unit) - CC1[11:8] = 0x5 (4K page size) - CC0[11] = 1 (Secondary Clock Disable: disable clock) - CC0[10] = 0 (Primary Access Lockout: allow primary access) - */ - pci_write_config_dword (dev, 0xcc, 0x05000800); -} |
