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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * o2micro.h 1.13 1999/10/25 20:03:34
3 *
4 * The contents of this file are subject to the Mozilla Public License
5 * Version 1.1 (the "License"); you may not use this file except in
6 * compliance with the License. You may obtain a copy of the License
7 * at http://www.mozilla.org/MPL/
8 *
9 * Software distributed under the License is distributed on an "AS IS"
10 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
11 * the License for the specific language governing rights and
12 * limitations under the License.
13 *
14 * The initial developer of the original code is David A. Hinds
15 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
16 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
17 *
18 * Alternatively, the contents of this file may be used under the
19 * terms of the GNU General Public License version 2 (the "GPL"), in which
20 * case the provisions of the GPL are applicable instead of the
21 * above. If you wish to allow the use of your version of this file
22 * only under the terms of the GPL and not to allow others to use
23 * your version of this file under the MPL, indicate your decision by
24 * deleting the provisions above and replace them with the notice and
25 * other provisions required by the GPL. If you do not delete the
26 * provisions above, a recipient may use your version of this file
27 * under either the MPL or the GPL.
28 */
29
30#ifndef _LINUX_O2MICRO_H
31#define _LINUX_O2MICRO_H
32
33#ifndef PCI_VENDOR_ID_O2
34#define PCI_VENDOR_ID_O2 0x1217
35#endif
36#ifndef PCI_DEVICE_ID_O2_6729
37#define PCI_DEVICE_ID_O2_6729 0x6729
38#endif
39#ifndef PCI_DEVICE_ID_O2_6730
40#define PCI_DEVICE_ID_O2_6730 0x673a
41#endif
42#ifndef PCI_DEVICE_ID_O2_6832
43#define PCI_DEVICE_ID_O2_6832 0x6832
44#endif
45#ifndef PCI_DEVICE_ID_O2_6836
46#define PCI_DEVICE_ID_O2_6836 0x6836
47#endif
48#ifndef PCI_DEVICE_ID_O2_6812
49#define PCI_DEVICE_ID_O2_6812 0x6872
50#endif
51
52/* Additional PCI configuration registers */
53
54#define O2_MUX_CONTROL 0x90 /* 32 bit */
55#define O2_MUX_RING_OUT 0x0000000f
56#define O2_MUX_SKTB_ACTV 0x000000f0
57#define O2_MUX_SCTA_ACTV_ENA 0x00000100
58#define O2_MUX_SCTB_ACTV_ENA 0x00000200
59#define O2_MUX_SER_IRQ_ROUTE 0x0000e000
60#define O2_MUX_SER_PCI 0x00010000
61
62#define O2_MUX_SKTA_TURBO 0x000c0000 /* for 6833, 6860 */
63#define O2_MUX_SKTB_TURBO 0x00300000
64#define O2_MUX_AUX_VCC_3V 0x00400000
65#define O2_MUX_PCI_VCC_5V 0x00800000
66#define O2_MUX_PME_MUX 0x0f000000
67
68/* Additional ExCA registers */
69
70#define O2_MODE_A 0x38
71#define O2_MODE_A_2 0x26 /* for 6833B, 6860C */
72#define O2_MODE_A_CD_PULSE 0x04
73#define O2_MODE_A_SUSP_EDGE 0x08
74#define O2_MODE_A_HOST_SUSP 0x10
75#define O2_MODE_A_PWR_MASK 0x60
76#define O2_MODE_A_QUIET 0x80
77
78#define O2_MODE_B 0x39
79#define O2_MODE_B_2 0x2e /* for 6833B, 6860C */
80#define O2_MODE_B_IDENT 0x03
81#define O2_MODE_B_ID_BSTEP 0x00
82#define O2_MODE_B_ID_CSTEP 0x01
83#define O2_MODE_B_ID_O2 0x02
84#define O2_MODE_B_VS1 0x04
85#define O2_MODE_B_VS2 0x08
86#define O2_MODE_B_IRQ15_RI 0x80
87
88#define O2_MODE_C 0x3a
89#define O2_MODE_C_DREQ_MASK 0x03
90#define O2_MODE_C_DREQ_INPACK 0x01
91#define O2_MODE_C_DREQ_WP 0x02
92#define O2_MODE_C_DREQ_BVD2 0x03
93#define O2_MODE_C_ZVIDEO 0x08
94#define O2_MODE_C_IREQ_SEL 0x30
95#define O2_MODE_C_MGMT_SEL 0xc0
96
97#define O2_MODE_D 0x3b
98#define O2_MODE_D_IRQ_MODE 0x03
99#define O2_MODE_D_PCI_CLKRUN 0x04
100#define O2_MODE_D_CB_CLKRUN 0x08
101#define O2_MODE_D_SKT_ACTV 0x20
102#define O2_MODE_D_PCI_FIFO 0x40 /* for OZ6729, OZ6730 */
103#define O2_MODE_D_W97_IRQ 0x40
104#define O2_MODE_D_ISA_IRQ 0x80
105
106#define O2_MHPG_DMA 0x3c
107#define O2_MHPG_CHANNEL 0x07
108#define O2_MHPG_CINT_ENA 0x08
109#define O2_MHPG_CSC_ENA 0x10
110
111#define O2_FIFO_ENA 0x3d
112#define O2_FIFO_ZVIDEO_3 0x08
113#define O2_FIFO_PCI_FIFO 0x10
114#define O2_FIFO_POSTWR 0x40
115#define O2_FIFO_BUFFER 0x80
116
117#define O2_MODE_E 0x3e
118#define O2_MODE_E_MHPG_DMA 0x01
119#define O2_MODE_E_SPKR_OUT 0x02
120#define O2_MODE_E_LED_OUT 0x08
121#define O2_MODE_E_SKTA_ACTV 0x10
122
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700123#define O2_RESERVED1 0x94
124#define O2_RESERVED2 0xD4
125#define O2_RES_READ_PREFETCH 0x02
126#define O2_RES_WRITE_BURST 0x08
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128static int o2micro_override(struct yenta_socket *socket)
129{
130 /*
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700131 * 'reserved' register at 0x94/D4. allows setting read prefetch and write
132 * bursting. read prefetching for example makes the RME Hammerfall DSP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 * working. for some bridges it is at 0x94, for others at 0xD4. it's
134 * ok to write to both registers on all O2 bridges.
135 * from Eric Still, 02Micro.
136 */
137 u8 a, b;
138
139 if (PCI_FUNC(socket->dev->devfn) == 0) {
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700140 a = config_readb(socket, O2_RESERVED1);
141 b = config_readb(socket, O2_RESERVED2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
Dominik Brodowskidd797d82008-08-02 17:54:14 +0200143 dev_printk(KERN_INFO, &socket->dev->dev,
144 "O2: res at 0x94/0xD4: %02x/%02x\n", a, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 switch (socket->dev->device) {
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700147 /*
148 * older bridges have problems with both read prefetch and write
149 * bursting depending on the combination of the chipset, bridge
150 * and the cardbus card. so disable them to be on the safe side.
151 */
152 case PCI_DEVICE_ID_O2_6729:
153 case PCI_DEVICE_ID_O2_6730:
154 case PCI_DEVICE_ID_O2_6812:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 case PCI_DEVICE_ID_O2_6832:
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700156 case PCI_DEVICE_ID_O2_6836:
Dominik Brodowskidd797d82008-08-02 17:54:14 +0200157 dev_printk(KERN_INFO, &socket->dev->dev,
158 "Yenta O2: old bridge, disabling read "
159 "prefetch/write burst\n");
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700160 config_writeb(socket, O2_RESERVED1,
161 a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
162 config_writeb(socket, O2_RESERVED2,
163 b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 break;
165
166 default:
Dominik Brodowskidd797d82008-08-02 17:54:14 +0200167 dev_printk(KERN_INFO , &socket->dev->dev,
168 "O2: enabling read prefetch/write burst\n");
Daniel Ritzeaaf9c62005-07-28 01:07:30 -0700169 config_writeb(socket, O2_RESERVED1,
170 a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
171 config_writeb(socket, O2_RESERVED2,
172 b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 }
174 }
175
176 return 0;
177}
178
179static void o2micro_restore_state(struct yenta_socket *socket)
180{
181 /*
182 * as long as read prefetch is the only thing in
183 * o2micro_override, it's safe to call it from here
184 */
185 o2micro_override(socket);
186}
187
188#endif /* _LINUX_O2MICRO_H */