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Diffstat (limited to 'southbridge/amd/cs5536/nand.c')
| -rw-r--r-- | southbridge/amd/cs5536/nand.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/southbridge/amd/cs5536/nand.c b/southbridge/amd/cs5536/nand.c new file mode 100644 index 000000000000..7d176c27a075 --- /dev/null +++ b/southbridge/amd/cs5536/nand.c @@ -0,0 +1,93 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2009 Artec Design LLC. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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.h> +#include <device/pci.h> +#include <msr.h> +#include <statictree.h> +#include "cs5536.h" + +/** + * Enables the FLASH PCI header when NAND device existing in mainboard device + * tree. Used when the mainboard has a FLASH part instead of an IDE drive and + * that fact is expressed in the mainboard device tree. + * Must be called after VSA init but before PCI scans to enable the flash + * PCI device header early enough - that is .phase2_fixup of the device. + * + * @param dev The device. + */ +static void nand_phase2(struct device *dev) +{ + if (dev->enabled) { + struct southbridge_amd_cs5536_nand_config *nand; + struct msr msr; + + /* Set up timings */ + nand = (struct southbridge_amd_cs5536_nand_config *)dev->device_configuration; + msr.hi = 0x0; + + if (nand->nandf_data) { + msr.lo = nand->nandf_data; + wrmsr(MDD_NANDF_DATA, msr); + printk(BIOS_DEBUG, "NANDF_DATA set to 0x%08x\n", msr.lo); + } + if (nand->nandf_ctl) { + msr.lo = nand->nandf_ctl; + wrmsr(MDD_NANDF_CTL, msr); + printk(BIOS_DEBUG, "NANDF_CTL set to 0x%08x\n", msr.lo); + } + + /* Tell VSA to use FLASH PCI header. Not IDE header. */ + hide_vpci(0x800079C4); + } +} + +static void nand_read_resources(struct device *dev) +{ + pci_dev_read_resources(dev); + + /* All memory accesses in the range of 0xF0000000 - 0xFFFFFFFF routed to + * Diverse Integration Logic (DIVIL) get always sent to the device inside + * DIVIL as set in DIVIL_BALL_OPTS PRI_BOOT_LOC and SEC_BOOT_LOC bits + * (see CS5536 data book chapter 6.6.2.10 DIVIL_BALL_OPTS PRI_BOOT_LOC + * description). + * The virtual PCI address limit test gives us a false upper limit of + * 0xFFFFFFFF for this device, but we do not want NAND Flash to be using + * memory addresses 0xF0000000 and above as those accesses would end up + * somewhere else instead. Therefore if VSA2 gave us a MMIO resource for + * NAND Flash, patch this (fixed) resources higher bound to 0xEFFFFFFF. + */ + if ((dev->resources >= 1) && (dev->resource[0].flags & IORESOURCE_MEM) && + (dev->resource[0].limit > 0xefffffff)) + dev->resource[0].limit = 0xefffffff; +} + +struct device_operations cs5536_nand = { + .id = {.type = DEVICE_ID_PCI, + {.pci = {.vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_CS5536_FLASH}}}, + .constructor = default_device_constructor, + .phase2_fixup = nand_phase2, + .phase3_scan = 0, + .phase4_read_resources = nand_read_resources, + .phase4_set_resources = pci_set_resources, + .phase5_enable_resources = pci_dev_enable_resources, + .phase6_init = 0, /* No Option ROMs */ + .ops_pci = &pci_dev_ops_pci, +}; |