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
21 #include <device/device.h>
22 #include <device/pci.h>
23 #include <device/pci_ops.h>
24 #include <device/pci_ids.h>
25 #include <console/console.h>
28 /* We support here K8M890/K8T890 and VT8237R PCI1/Vlink which setup is not in separate
29 * PCI device 0:11.7, but it is mapped to PCI 0:0.7 (0x70-0x7c for PCI1)
32 static void vt8237r_cfg(struct device *dev, struct device *devsb)
38 devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
39 PCI_DEVICE_ID_VIA_K8T800_DRAM, 0);
42 devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
43 PCI_DEVICE_ID_VIA_K8M800_DRAM, 0);
46 devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
47 PCI_DEVICE_ID_VIA_K8T890CE_3, 0);
50 devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
51 PCI_DEVICE_ID_VIA_K8T890CF_3, 0);
54 devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
55 PCI_DEVICE_ID_VIA_K8M890CE_3, 0);
58 die("\n vt8237r_cfg: Unable to find K8x8xx bridge via PCI scan. Stopping.\n");
60 pci_write_config8(dev, 0x70, 0xc2);
63 pci_write_config8(dev, 0x72, 0xee);
64 pci_write_config8(dev, 0x73, 0x01);
65 pci_write_config8(dev, 0x74, 0x24);
66 pci_write_config8(dev, 0x75, 0x0f);
67 pci_write_config8(dev, 0x76, 0x50);
68 pci_write_config8(dev, 0x77, 0x08);
69 pci_write_config8(dev, 0x78, 0x01);
71 pci_write_config8(dev, 0x7c, 0x7f);
72 pci_write_config8(dev, 0x7f, 0x02);
74 /* WARNING: Need to copy some registers from NB (D0F3) to SB (D0F7). */
76 regm = pci_read_config8(devfun3, 0x88); /* Shadow mem CTRL */
77 pci_write_config8(dev, 0x57, regm);
79 regm = pci_read_config8(devfun3, 0x80); /* Shadow page C */
80 pci_write_config8(dev, 0x61, regm);
82 regm = pci_read_config8(devfun3, 0x81); /* Shadow page D */
83 pci_write_config8(dev, 0x62, regm);
85 regm = pci_read_config8(devfun3, 0x86); /* SMM and APIC decoding */
86 pci_write_config8(dev, 0xe6, regm);
88 regm3 = pci_read_config8(devfun3, 0x82);/* Shadow page E */
91 * All access bits for 0xE0000-0xEFFFF encode as just 2 bits!
92 * So the NB reg is quite inconsistent, we expect there only 0xff or 0x00,
93 * and write them to 0x63 7-6 but! VIA 8237A has the mirror at 0x64!
100 /* Shadow page F + memhole copy */
101 regm = pci_read_config8(devfun3, 0x83);
102 pci_write_config8(dev, 0x63, regm3 | (regm & 0x3F));
109 * Setup the V-Link for VT8237R, 8X mode.
111 * For K8T890CF VIA recommends what is in VIA column, AW is award 8X:
113 * REG DEF AW VIA-8X VIA-4X
114 * -----------------------------
115 * NB V-Link Manual Driving Control strobe 0xb5 0x46 0x46 0x88 0x88
116 * NB V-Link Manual Driving Control - Data 0xb6 0x46 0x46 0x88 0x88
117 * NB V-Link Receiving Strobe Delay 0xb7 0x02 0x02 0x61 0x01
118 * NB V-Link Compensation Control bit4,0 (b5,b6) 0xb4 0x10 0x10 0x11 0x11
119 * SB V-Link Strobe Drive Control 0xb9 0x00 0xa5 0x98 0x98
120 * SB V-Link Data drive Control???? 0xba 0x00 0xbb 0x77 0x77
121 * SB V-Link Receive Strobe Delay???? 0xbb 0x04 0x11 0x11 0x11
122 * SB V-Link Compensation Control bit0 (use b9) 0xb8 0x00 0x01 0x01 0x01
123 * V-Link CKG Control 0xb0 0x05 0x05 0x06 0x03
124 * V-Link CKG Control 0xb1 0x05 0x05 0x01 0x03
127 static void vt8237r_vlink_init(struct device *dev)
132 * This init code is valid only for the VT8237R! For different
133 * sounthbridges (e.g. VT8237A, VT8237S, VT8237 (without plus R)
134 * and VT8251) a different init code is required.
137 pci_write_config8(dev, 0xb5, 0x88);
138 pci_write_config8(dev, 0xb6, 0x88);
139 pci_write_config8(dev, 0xb7, 0x61);
141 reg = pci_read_config8(dev, 0xb4);
143 pci_write_config8(dev, 0xb4, reg);
145 pci_write_config8(dev, 0xb9, 0x98);
146 pci_write_config8(dev, 0xba, 0x77);
147 pci_write_config8(dev, 0xbb, 0x11);
149 reg = pci_read_config8(dev, 0xb8);
151 pci_write_config8(dev, 0xb8, reg);
153 pci_write_config8(dev, 0xb0, 0x06);
154 pci_write_config8(dev, 0xb1, 0x01);
156 /* Program V-link 8X 16bit full duplex, parity enabled. */
157 pci_write_config8(dev, 0x48, 0xa3);
160 static void ctrl_init(struct device *dev)
163 print_debug("K8x8xx: Initializing V-Link to VT8237R sb: ");
164 /* TODO: Fix some ordering issue fo V-link set Rx77[6] and PCI1_Rx4F[0]
167 /* C2P Read ACK Return Priority */
168 /* PCI CFG Address bits[27:24] are used as extended register address
171 pci_write_config8(dev, 0x47, 0x30);
173 /* VT8237R specific configuration other SB are done in their own directories */
175 device_t devsb = dev_find_device(PCI_VENDOR_ID_VIA,
176 PCI_DEVICE_ID_VIA_VT8237R_LPC, 0);
178 vt8237r_vlink_init(dev);
179 vt8237r_cfg(dev, devsb);
181 print_debug("VT8237R LPC not found !\n");
184 print_debug(" Done\n");
185 print_debug(" VIA_X_7 device dump:\n");
190 static const struct device_operations ctrl_ops = {
191 .read_resources = pci_dev_read_resources,
192 .set_resources = pci_dev_set_resources,
193 .enable_resources = pci_dev_enable_resources,
198 static const struct pci_driver northbridge_driver_t800 __pci_driver = {
200 .vendor = PCI_VENDOR_ID_VIA,
201 .device = PCI_DEVICE_ID_VIA_K8T800_NB_SB_CTR,
204 static const struct pci_driver northbridge_driver_m800 __pci_driver = {
206 .vendor = PCI_VENDOR_ID_VIA,
207 .device = PCI_DEVICE_ID_VIA_K8M800_NB_SB_CTR,
210 static const struct pci_driver northbridge_driver_t890 __pci_driver = {
212 .vendor = PCI_VENDOR_ID_VIA,
213 .device = PCI_DEVICE_ID_VIA_K8T890CE_7,
216 static const struct pci_driver northbridge_driver_t890cf __pci_driver = {
218 .vendor = PCI_VENDOR_ID_VIA,
219 .device = PCI_DEVICE_ID_VIA_K8T890CF_7,
222 static const struct pci_driver northbridge_driver_m890 __pci_driver = {
224 .vendor = PCI_VENDOR_ID_VIA,
225 .device = PCI_DEVICE_ID_VIA_K8M890CE_7,