diff options
author | Zheng Bao <zheng.bao@amd.com> | 2010-03-16 01:41:14 +0000 |
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committer | Zheng Bao <Zheng.Bao@amd.com> | 2010-03-16 01:41:14 +0000 |
commit | 1088bbff4503df7e8507aae45da823268262ca8f (patch) | |
tree | 414123cac2bdd5f70b10d64082b792e7a52e2c45 /src/southbridge/amd/rs780/rs780_ht.c | |
parent | eff2ffdee8489f97b265b0335b766be3db9a633a (diff) |
Features supported in RS780 code:
* PCIe initialization.
* Internal Graphics initialization.
* HT Link initialization. It works in HT1 or HT3 mode.
Note:
1. I tried to add the description of every step to the code. For example,
if it is made based on rpr, section 2.4.5, I will pasted the words
from 2.4.5 to the c code. But the document I worked with might be
different with the most updated one. A new section has been added and
the 2.4.5 might be changed to 2.5.5. That migh lead to confusing. I
correct every comment if I met one. But I have to confess that I am so
reluctant to find out everyone. I believe it will be correct in the long
run.
2. The interanl graphics part is done by Libo Feng <libo.feng@amd.com>.
3. There is a conflict between RPR and our CIM code. Please see the comment in
switching_gppsb_configurations in rs780_pcie.c.
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Acked-by: Marc Jones <marcj303@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5219 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/amd/rs780/rs780_ht.c')
-rw-r--r-- | src/southbridge/amd/rs780/rs780_ht.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/southbridge/amd/rs780/rs780_ht.c b/src/southbridge/amd/rs780/rs780_ht.c new file mode 100644 index 0000000000..5af19b1dcf --- /dev/null +++ b/src/southbridge/amd/rs780/rs780_ht.c @@ -0,0 +1,90 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2010 Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include "rs780.h" + +/* for UMA internal graphics */ +void avoid_lpc_dma_deadlock(device_t nb_dev, device_t sb_dev) +{ + device_t cpu_f0; + u8 reg; + + cpu_f0 = dev_find_slot(0, PCI_DEVFN(0x18, 0)); + set_nbcfg_enable_bits(cpu_f0, 0x68, 3 << 21, 1 << 21); + + reg = nbpcie_p_read_index(sb_dev, 0x10); + reg |= 0x100; /* bit9=1 */ + nbpcie_p_write_index(sb_dev, 0x10, reg); + + reg = nbpcie_p_read_index(nb_dev, 0x10); + reg |= 0x100; /* bit9=1 */ + nbpcie_p_write_index(nb_dev, 0x10, reg); + + /* Enable NP protocol over PCIE for memory-mapped writes targeting LPC + * Set this bit to avoid a deadlock condition. */ + reg = htiu_read_index(nb_dev, 0x6); + reg |= 0x1000000; /* bit26 */ + htiu_write_index(nb_dev, 0x6, reg); +} + +static void pcie_init(struct device *dev) +{ + /* Enable pci error detecting */ + u32 dword; + + printk_info("pcie_init in rs780_ht.c\n"); + + /* System error enable */ + dword = pci_read_config32(dev, 0x04); + dword |= (1 << 8); /* System error enable */ + dword |= (1 << 30); /* Clear possible errors */ + pci_write_config32(dev, 0x04, dword); + + /* + * 1 is APIC enable + * 18 is enable nb to accept A4 interrupt request from SB. + */ + dword = pci_read_config32(dev, 0x4C); + dword |= 1 << 1 | 1 << 18; /* Clear possible errors */ + pci_write_config32(dev, 0x4C, dword); +} + +static struct pci_operations lops_pci = { + .set_subsystem = pci_dev_set_subsystem, +}; + +static struct device_operations ht_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = pcie_init, + .scan_bus = 0, + .ops_pci = &lops_pci, +}; + +static struct pci_driver ht_driver __pci_driver = { + .ops = &ht_ops, + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_RS780_HT, +}; |