Since some people disapprove of white space cleanups mixed in regular commits
[coreboot.git] / src / southbridge / via / k8t890 / k8t890_ctrl.c
1 /*
2  * This file is part of the coreboot project.
3  *
4  * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
18  */
19
20 #include <device/device.h>
21 #include <device/pci.h>
22 #include <device/pci_ops.h>
23 #include <device/pci_ids.h>
24 #include <console/console.h>
25
26 /* We support here K8M890/K8T890 and VT8237R PCI1/Vlink which setup is not in separate
27  * PCI device 0:11.7, but it is mapped to PCI 0:0.7 (0x70-0x7c for PCI1)
28  */
29
30 static void vt8237r_cfg(struct device *dev, struct device *devsb)
31 {
32         u8 regm, regm3;
33
34         device_t devfun3;
35
36         devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
37                                            PCI_DEVICE_ID_VIA_K8T890CE_3, 0);
38
39                 if (!devfun3)
40                         devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
41                                            PCI_DEVICE_ID_VIA_K8M890CE_3, 0);
42
43         pci_write_config8(dev, 0x70, 0xc2);
44
45         /* PCI Control */
46         pci_write_config8(dev, 0x72, 0xee);
47         pci_write_config8(dev, 0x73, 0x01);
48         pci_write_config8(dev, 0x74, 0x24);
49         pci_write_config8(dev, 0x75, 0x0f);
50         pci_write_config8(dev, 0x76, 0x50);
51         pci_write_config8(dev, 0x77, 0x08);
52         pci_write_config8(dev, 0x78, 0x01);
53         /* APIC on HT */
54         pci_write_config8(dev, 0x7c, 0x7f);
55         pci_write_config8(dev, 0x7f, 0x02);
56
57         /* WARNING: Need to copy some registers from NB (D0F3) to SB (D0F7). */
58
59         regm = pci_read_config8(devfun3, 0x88); /* Shadow mem CTRL */
60         pci_write_config8(dev, 0x57, regm);
61
62         regm = pci_read_config8(devfun3, 0x80); /* Shadow page C */
63         pci_write_config8(dev, 0x61, regm);
64
65         regm = pci_read_config8(devfun3, 0x81); /* Shadow page D */
66         pci_write_config8(dev, 0x62, regm);
67
68         regm = pci_read_config8(devfun3, 0x86); /* SMM and APIC decoding */
69         pci_write_config8(dev, 0xe6, regm);
70
71         regm3 = pci_read_config8(devfun3, 0x82);/* Shadow page E */
72
73         /*
74          * All access bits for 0xE0000-0xEFFFF encode as just 2 bits!
75          * So the NB reg is quite inconsistent, we expect there only 0xff or 0x00,
76          * and write them to 0x63 7-6 but! VIA 8237A has the mirror at 0x64!
77          */
78         if (regm3 == 0xff)
79                 regm3 = 0xc0;
80         else
81                 regm3 = 0x0;
82
83         /* Shadow page F + memhole copy */
84         regm = pci_read_config8(devfun3, 0x83);
85         pci_write_config8(dev, 0x63, regm3 | (regm & 0x3F));
86 }
87
88
89
90 /**
91  * Setup the V-Link for VT8237R, 8X mode.
92  *
93  * For K8T890CF VIA recommends what is in VIA column, AW is award 8X:
94  *
95  *                                               REG   DEF   AW  VIA-8X VIA-4X
96  *                                               -----------------------------
97  * NB V-Link Manual Driving Control strobe       0xb5  0x46  0x46  0x88  0x88
98  * NB V-Link Manual Driving Control - Data       0xb6  0x46  0x46  0x88  0x88
99  * NB V-Link Receiving Strobe Delay              0xb7  0x02  0x02  0x61  0x01
100  * NB V-Link Compensation Control bit4,0 (b5,b6) 0xb4  0x10  0x10  0x11  0x11
101  * SB V-Link Strobe Drive Control                0xb9  0x00  0xa5  0x98  0x98
102  * SB V-Link Data drive Control????              0xba  0x00  0xbb  0x77  0x77
103  * SB V-Link Receive Strobe Delay????            0xbb  0x04  0x11  0x11  0x11
104  * SB V-Link Compensation Control bit0 (use b9)  0xb8  0x00  0x01  0x01  0x01
105  * V-Link CKG Control                            0xb0  0x05  0x05  0x06  0x03
106  * V-Link CKG Control                            0xb1  0x05  0x05  0x01  0x03
107  */
108
109 static void vt8237r_vlink_init(struct device *dev)
110 {
111         u8 reg;
112
113         /*
114          * This init code is valid only for the VT8237R! For different
115          * sounthbridges (e.g. VT8237A, VT8237S, VT8237 (without plus R)
116          * and VT8251) a different init code is required.
117          */
118
119         pci_write_config8(dev, 0xb5, 0x88);
120         pci_write_config8(dev, 0xb6, 0x88);
121         pci_write_config8(dev, 0xb7, 0x61);
122
123         reg = pci_read_config8(dev, 0xb4);
124         reg |= 0x11;
125         pci_write_config8(dev, 0xb4, reg);
126
127         pci_write_config8(dev, 0xb9, 0x98);
128         pci_write_config8(dev, 0xba, 0x77);
129         pci_write_config8(dev, 0xbb, 0x11);
130
131         reg = pci_read_config8(dev, 0xb8);
132         reg |= 0x1;
133         pci_write_config8(dev, 0xb8, reg);
134
135         pci_write_config8(dev, 0xb0, 0x06);
136         pci_write_config8(dev, 0xb1, 0x01);
137
138         /* Program V-link 8X 16bit full duplex, parity enabled. */
139         pci_write_config8(dev, 0x48, 0xa3);
140 }
141
142 static void ctrl_init(struct device *dev) {
143
144         /* TODO: Fix some ordering issue fo V-link set Rx77[6] and PCI1_Rx4F[0]
145            should to 1 */
146
147         /* C2P Read ACK Return Priority */
148         /* PCI CFG Address bits[27:24] are used as extended register address
149            bit[11:8] */
150
151         pci_write_config8(dev, 0x47, 0x30);
152
153         /* VT8237R specific configuration  other SB are done in their own directories */
154
155         device_t devsb = dev_find_device(PCI_VENDOR_ID_VIA,
156                                          PCI_DEVICE_ID_VIA_VT8237R_LPC, 0);
157         if (devsb) {
158                 vt8237r_vlink_init(dev);
159                 vt8237r_cfg(dev, devsb);
160         }
161
162 }
163
164 static const struct device_operations ctrl_ops = {
165         .read_resources         = pci_dev_read_resources,
166         .set_resources          = pci_dev_set_resources,
167         .enable_resources       = pci_dev_enable_resources,
168         .init                   = ctrl_init,
169         .ops_pci                = 0,
170 };
171
172 static const struct pci_driver northbridge_driver_t __pci_driver = {
173         .ops    = &ctrl_ops,
174         .vendor = PCI_VENDOR_ID_VIA,
175         .device = PCI_DEVICE_ID_VIA_K8T890CE_7,
176 };
177
178 static const struct pci_driver northbridge_driver_m __pci_driver = {
179         .ops    = &ctrl_ops,
180         .vendor = PCI_VENDOR_ID_VIA,
181         .device = PCI_DEVICE_ID_VIA_K8M890CE_7,
182 };