2 * This file is part of the coreboot project.
4 * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
5 * Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@gmail.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * Seems the link and width of HT link needs to be setup too, you need to
23 * generate PCI reset or LDTSTOP to apply.
31 /* The 256 bytes of NVRAM for S3 storage, 256B aligned */
32 #define K8T890_NVRAM_IO_BASE 0xf00
33 #define K8T890_MULTIPLE_FN_EN 0x4f
35 /* AMD K8 LDT0, LDT1, LDT2 Link Control Registers */
36 static u8 ldtreg[3] = {0x86, 0xa6, 0xc6};
38 #if CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800_OLD
39 #define K8X8XX_HT_CFG_BASE 0xc0
41 #define K8X8XX_HT_CFG_BASE 0x60
44 /* This functions sets KT890 link frequency and width to same values as
45 * it has been setup on K8 side, by AMD NB init.
46 * This will not work for K8T800_OLD, which has a slightly different
47 * register arrangement (device 3188)
50 u8 k8t890_early_setup_ht(void)
52 u8 awidth, afreq, cldtfreq;
53 u8 cldtwidth_in, cldtwidth_out, vldtwidth_in, vldtwidth_out, ldtnr, width;
56 #if !CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800_OLD
59 /* hack, enable NVRAM in chipset */
60 pci_write_config8(PCI_DEV(0, 0x0, 0), K8T890_MULTIPLE_FN_EN, 0x01);
63 * NVRAM I/O base at K8T890_NVRAM_IO_BASE
66 pci_write_config8(PCI_DEV(0, 0x0, 2), 0xa2, (K8T890_NVRAM_IO_BASE >> 8));
67 reg = pci_read_config8(PCI_DEV(0, 0x0, 2), 0xa1);
69 pci_write_config8(PCI_DEV(0, 0x0, 2), 0xa1, reg);
72 /* check if connected non coherent, initcomplete (find the SB on K8 side) */
74 if (0x7 == pci_read_config8(PCI_DEV(0, 0x18, 0), 0x98)) {
76 } else if (0x7 == pci_read_config8(PCI_DEV(0, 0x18, 0), 0xb8)) {
78 } else if (0x7 == pci_read_config8(PCI_DEV(0, 0x18, 0), 0xd8)) {
82 #if CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8M800
83 print_debug("K8M800 found at LDT ");
84 #elif CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800
85 print_debug("K8T800 found at LDT ");
86 #elif CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800_OLD
87 print_debug("K8T800_OLD found at LDT ");
88 pci_write_config8(PCI_DEV(0, 0x0, 0), 0x64, 0x00);
89 pci_write_config8(PCI_DEV(0, 0x0, 0), 0xdd, 0x50);
90 #elif CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800PRO
91 print_debug("K8T800 Pro found at LDT ");
92 #elif CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8M890
93 print_debug("K8M890 found at LDT ");
94 /* K8M890 fix HT delay */
95 pci_write_config8(PCI_DEV(0, 0x0, 2), 0xab, 0x22);
96 #elif CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T890
97 print_debug("K8T890 found at LDT ");
99 print_debug_hex8(ldtnr);
101 /* get the maximum widths for both sides */
102 cldtwidth_in = pci_read_config8(PCI_DEV(0, 0x18, 0), ldtreg[ldtnr]) & 0x7;
103 cldtwidth_out = (pci_read_config8(PCI_DEV(0, 0x18, 0), ldtreg[ldtnr]) >> 4) & 0x7;
104 vldtwidth_in = pci_read_config8(PCI_DEV(0, 0x0, 0), K8X8XX_HT_CFG_BASE + 0x6) & 0x7;
105 vldtwidth_out = (pci_read_config8(PCI_DEV(0, 0x0, 0), K8X8XX_HT_CFG_BASE + 0x6) >> 4) & 0x7;
107 width = MIN(MIN(MIN(cldtwidth_out, cldtwidth_in), vldtwidth_out), vldtwidth_in);
108 print_debug(" Agreed on width: ");
109 print_debug_hex8(width);
111 awidth = pci_read_config8(PCI_DEV(0, 0x0, 0), K8X8XX_HT_CFG_BASE + 0x7);
113 /* Update the desired HT LNK to match AMD NB max from VIA NB is 0x1 */
114 width = (width == 0x01) ? 0x11 : 0x00;
116 pci_write_config8(PCI_DEV(0, 0x0, 0), K8X8XX_HT_CFG_BASE + 0x7, width);
118 /* Get programmed HT freq at base 0x89 */
119 cldtfreq = pci_read_config8(PCI_DEV(0, 0x18, 0), ldtreg[ldtnr] + 3) & 0xf;
120 print_debug(" CPU programmed to HT freq: ");
121 print_debug_hex8(cldtfreq);
123 print_debug(" VIA HT caps: ");
124 vldtcaps = pci_read_config16(PCI_DEV(0, 0, 0), K8X8XX_HT_CFG_BASE + 0xe);
125 print_debug_hex16(vldtcaps);
127 if (!(vldtcaps & (1 << cldtfreq ))) {
128 die("Chipset does not support desired HT frequency\n");
131 afreq = pci_read_config8(PCI_DEV(0, 0x0, 0), K8X8XX_HT_CFG_BASE + 0xd);
132 pci_write_config8(PCI_DEV(0, 0x0, 0), K8X8XX_HT_CFG_BASE + 0xd, cldtfreq);
135 /* no reset needed */
136 if ((width == awidth) && (afreq == cldtfreq)) {
143 static inline int s3_save_nvram_early(u32 dword, int size, int nvram_pos)
146 printk(BIOS_DEBUG, "Writing %x of size %d to nvram pos: %d\n", dword, size, nvram_pos);
149 outb((dword & 0xff), K8T890_NVRAM_IO_BASE+nvram_pos);
153 outw((dword & 0xffff), K8T890_NVRAM_IO_BASE+nvram_pos);
157 outl(dword, K8T890_NVRAM_IO_BASE+nvram_pos);
164 static inline int s3_load_nvram_early(int size, u32 *old_dword, int nvram_pos)
169 *old_dword |= inb(K8T890_NVRAM_IO_BASE+nvram_pos);
173 *old_dword &= ~0xffff;
174 *old_dword |= inw(K8T890_NVRAM_IO_BASE+nvram_pos);
178 *old_dword = inl(K8T890_NVRAM_IO_BASE+nvram_pos);
182 printk(BIOS_DEBUG, "Loading %x of size %d to nvram pos:%d\n", * old_dword, size, nvram_pos-size);
186 struct cbmem_entry *get_cbmem_toc(void) {
187 return (struct cbmem_entry *) inl(K8T890_NVRAM_IO_BASE+K8T890_NVRAM_CBMEM_TOC);