1 /* 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 /* Additional PCI configuration registers */ 34 35 #define O2_MUX_CONTROL 0x90 /* 32 bit */ 36 #define O2_MUX_RING_OUT 0x0000000f 37 #define O2_MUX_SKTB_ACTV 0x000000f0 38 #define O2_MUX_SCTA_ACTV_ENA 0x00000100 39 #define O2_MUX_SCTB_ACTV_ENA 0x00000200 40 #define O2_MUX_SER_IRQ_ROUTE 0x0000e000 41 #define O2_MUX_SER_PCI 0x00010000 42 43 #define O2_MUX_SKTA_TURBO 0x000c0000 /* for 6833, 6860 */ 44 #define O2_MUX_SKTB_TURBO 0x00300000 45 #define O2_MUX_AUX_VCC_3V 0x00400000 46 #define O2_MUX_PCI_VCC_5V 0x00800000 47 #define O2_MUX_PME_MUX 0x0f000000 48 49 /* Additional ExCA registers */ 50 51 #define O2_MODE_A 0x38 52 #define O2_MODE_A_2 0x26 /* for 6833B, 6860C */ 53 #define O2_MODE_A_CD_PULSE 0x04 54 #define O2_MODE_A_SUSP_EDGE 0x08 55 #define O2_MODE_A_HOST_SUSP 0x10 56 #define O2_MODE_A_PWR_MASK 0x60 57 #define O2_MODE_A_QUIET 0x80 58 59 #define O2_MODE_B 0x39 60 #define O2_MODE_B_2 0x2e /* for 6833B, 6860C */ 61 #define O2_MODE_B_IDENT 0x03 62 #define O2_MODE_B_ID_BSTEP 0x00 63 #define O2_MODE_B_ID_CSTEP 0x01 64 #define O2_MODE_B_ID_O2 0x02 65 #define O2_MODE_B_VS1 0x04 66 #define O2_MODE_B_VS2 0x08 67 #define O2_MODE_B_IRQ15_RI 0x80 68 69 #define O2_MODE_C 0x3a 70 #define O2_MODE_C_DREQ_MASK 0x03 71 #define O2_MODE_C_DREQ_INPACK 0x01 72 #define O2_MODE_C_DREQ_WP 0x02 73 #define O2_MODE_C_DREQ_BVD2 0x03 74 #define O2_MODE_C_ZVIDEO 0x08 75 #define O2_MODE_C_IREQ_SEL 0x30 76 #define O2_MODE_C_MGMT_SEL 0xc0 77 78 #define O2_MODE_D 0x3b 79 #define O2_MODE_D_IRQ_MODE 0x03 80 #define O2_MODE_D_PCI_CLKRUN 0x04 81 #define O2_MODE_D_CB_CLKRUN 0x08 82 #define O2_MODE_D_SKT_ACTV 0x20 83 #define O2_MODE_D_PCI_FIFO 0x40 /* for OZ6729, OZ6730 */ 84 #define O2_MODE_D_W97_IRQ 0x40 85 #define O2_MODE_D_ISA_IRQ 0x80 86 87 #define O2_MHPG_DMA 0x3c 88 #define O2_MHPG_CHANNEL 0x07 89 #define O2_MHPG_CINT_ENA 0x08 90 #define O2_MHPG_CSC_ENA 0x10 91 92 #define O2_FIFO_ENA 0x3d 93 #define O2_FIFO_ZVIDEO_3 0x08 94 #define O2_FIFO_PCI_FIFO 0x10 95 #define O2_FIFO_POSTWR 0x40 96 #define O2_FIFO_BUFFER 0x80 97 98 #define O2_MODE_E 0x3e 99 #define O2_MODE_E_MHPG_DMA 0x01 100 #define O2_MODE_E_SPKR_OUT 0x02 101 #define O2_MODE_E_LED_OUT 0x08 102 #define O2_MODE_E_SKTA_ACTV 0x10 103 104 #define O2_RESERVED1 0x94 105 #define O2_RESERVED2 0xD4 106 #define O2_RES_READ_PREFETCH 0x02 107 #define O2_RES_WRITE_BURST 0x08 108 109 static int o2micro_override(struct yenta_socket *socket) 110 { 111 /* 112 * 'reserved' register at 0x94/D4. allows setting read prefetch and write 113 * bursting. read prefetching for example makes the RME Hammerfall DSP 114 * working. for some bridges it is at 0x94, for others at 0xD4. it's 115 * ok to write to both registers on all O2 bridges. 116 * from Eric Still, 02Micro. 117 */ 118 u8 a, b; 119 bool use_speedup; 120 121 if (PCI_FUNC(socket->dev->devfn) == 0) { 122 a = config_readb(socket, O2_RESERVED1); 123 b = config_readb(socket, O2_RESERVED2); 124 dev_dbg(&socket->dev->dev, "O2: 0x94/0xD4: %02x/%02x\n", a, b); 125 126 switch (socket->dev->device) { 127 /* 128 * older bridges have problems with both read prefetch and write 129 * bursting depending on the combination of the chipset, bridge 130 * and the cardbus card. so disable them to be on the safe side. 131 */ 132 case PCI_DEVICE_ID_O2_6729: 133 case PCI_DEVICE_ID_O2_6730: 134 case PCI_DEVICE_ID_O2_6812: 135 case PCI_DEVICE_ID_O2_6832: 136 case PCI_DEVICE_ID_O2_6836: 137 case PCI_DEVICE_ID_O2_6933: 138 use_speedup = false; 139 break; 140 default: 141 use_speedup = true; 142 break; 143 } 144 145 /* the user may override our decision */ 146 if (strcasecmp(o2_speedup, "on") == 0) 147 use_speedup = true; 148 else if (strcasecmp(o2_speedup, "off") == 0) 149 use_speedup = false; 150 else if (strcasecmp(o2_speedup, "default") != 0) 151 dev_warn(&socket->dev->dev, 152 "O2: Unknown parameter, using 'default'"); 153 154 if (use_speedup) { 155 dev_info(&socket->dev->dev, 156 "O2: enabling read prefetch/write burst. If you experience problems or performance issues, use the yenta_socket parameter 'o2_speedup=off'\n"); 157 config_writeb(socket, O2_RESERVED1, 158 a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); 159 config_writeb(socket, O2_RESERVED2, 160 b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); 161 } else { 162 dev_info(&socket->dev->dev, 163 "O2: disabling read prefetch/write burst. If you experience problems or performance issues, use the yenta_socket parameter 'o2_speedup=on'\n"); 164 config_writeb(socket, O2_RESERVED1, 165 a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); 166 config_writeb(socket, O2_RESERVED2, 167 b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); 168 } 169 } 170 171 return 0; 172 } 173 174 static void o2micro_restore_state(struct yenta_socket *socket) 175 { 176 /* 177 * as long as read prefetch is the only thing in 178 * o2micro_override, it's safe to call it from here 179 */ 180 o2micro_override(socket); 181 } 182 183 #endif /* _LINUX_O2MICRO_H */ 184