184 lines · c
1/*2 * o2micro.h 1.13 1999/10/25 20:03:343 *4 * The contents of this file are subject to the Mozilla Public License5 * Version 1.1 (the "License"); you may not use this file except in6 * compliance with the License. You may obtain a copy of the License7 * 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. See11 * the License for the specific language governing rights and12 * limitations under the License. 13 *14 * The initial developer of the original code is David A. Hinds15 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds16 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.17 *18 * Alternatively, the contents of this file may be used under the19 * terms of the GNU General Public License version 2 (the "GPL"), in which20 * case the provisions of the GPL are applicable instead of the21 * above. If you wish to allow the use of your version of this file22 * only under the terms of the GPL and not to allow others to use23 * your version of this file under the MPL, indicate your decision by24 * deleting the provisions above and replace them with the notice and25 * other provisions required by the GPL. If you do not delete the26 * provisions above, a recipient may use your version of this file27 * under either the MPL or the GPL.28 */29 30#ifndef _LINUX_O2MICRO_H31#define _LINUX_O2MICRO_H32 33/* Additional PCI configuration registers */34 35#define O2_MUX_CONTROL 0x90 /* 32 bit */36#define O2_MUX_RING_OUT 0x0000000f37#define O2_MUX_SKTB_ACTV 0x000000f038#define O2_MUX_SCTA_ACTV_ENA 0x0000010039#define O2_MUX_SCTB_ACTV_ENA 0x0000020040#define O2_MUX_SER_IRQ_ROUTE 0x0000e00041#define O2_MUX_SER_PCI 0x0001000042 43#define O2_MUX_SKTA_TURBO 0x000c0000 /* for 6833, 6860 */44#define O2_MUX_SKTB_TURBO 0x0030000045#define O2_MUX_AUX_VCC_3V 0x0040000046#define O2_MUX_PCI_VCC_5V 0x0080000047#define O2_MUX_PME_MUX 0x0f00000048 49/* Additional ExCA registers */50 51#define O2_MODE_A 0x3852#define O2_MODE_A_2 0x26 /* for 6833B, 6860C */53#define O2_MODE_A_CD_PULSE 0x0454#define O2_MODE_A_SUSP_EDGE 0x0855#define O2_MODE_A_HOST_SUSP 0x1056#define O2_MODE_A_PWR_MASK 0x6057#define O2_MODE_A_QUIET 0x8058 59#define O2_MODE_B 0x3960#define O2_MODE_B_2 0x2e /* for 6833B, 6860C */61#define O2_MODE_B_IDENT 0x0362#define O2_MODE_B_ID_BSTEP 0x0063#define O2_MODE_B_ID_CSTEP 0x0164#define O2_MODE_B_ID_O2 0x0265#define O2_MODE_B_VS1 0x0466#define O2_MODE_B_VS2 0x0867#define O2_MODE_B_IRQ15_RI 0x8068 69#define O2_MODE_C 0x3a70#define O2_MODE_C_DREQ_MASK 0x0371#define O2_MODE_C_DREQ_INPACK 0x0172#define O2_MODE_C_DREQ_WP 0x0273#define O2_MODE_C_DREQ_BVD2 0x0374#define O2_MODE_C_ZVIDEO 0x0875#define O2_MODE_C_IREQ_SEL 0x3076#define O2_MODE_C_MGMT_SEL 0xc077 78#define O2_MODE_D 0x3b79#define O2_MODE_D_IRQ_MODE 0x0380#define O2_MODE_D_PCI_CLKRUN 0x0481#define O2_MODE_D_CB_CLKRUN 0x0882#define O2_MODE_D_SKT_ACTV 0x2083#define O2_MODE_D_PCI_FIFO 0x40 /* for OZ6729, OZ6730 */84#define O2_MODE_D_W97_IRQ 0x4085#define O2_MODE_D_ISA_IRQ 0x8086 87#define O2_MHPG_DMA 0x3c88#define O2_MHPG_CHANNEL 0x0789#define O2_MHPG_CINT_ENA 0x0890#define O2_MHPG_CSC_ENA 0x1091 92#define O2_FIFO_ENA 0x3d93#define O2_FIFO_ZVIDEO_3 0x0894#define O2_FIFO_PCI_FIFO 0x1095#define O2_FIFO_POSTWR 0x4096#define O2_FIFO_BUFFER 0x8097 98#define O2_MODE_E 0x3e99#define O2_MODE_E_MHPG_DMA 0x01100#define O2_MODE_E_SPKR_OUT 0x02101#define O2_MODE_E_LED_OUT 0x08102#define O2_MODE_E_SKTA_ACTV 0x10103 104#define O2_RESERVED1 0x94105#define O2_RESERVED2 0xD4106#define O2_RES_READ_PREFETCH 0x02107#define O2_RES_WRITE_BURST 0x08108 109static int o2micro_override(struct yenta_socket *socket)110{111 /*112 * 'reserved' register at 0x94/D4. allows setting read prefetch and write113 * bursting. read prefetching for example makes the RME Hammerfall DSP114 * working. for some bridges it is at 0x94, for others at 0xD4. it's115 * 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 write129 * bursting depending on the combination of the chipset, bridge130 * 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 174static void o2micro_restore_state(struct yenta_socket *socket)175{176 /*177 * as long as read prefetch is the only thing in178 * o2micro_override, it's safe to call it from here179 */180 o2micro_override(socket);181}182 183#endif /* _LINUX_O2MICRO_H */184