/* * o2micro.h 1.13 1999/10/25 20:03:34 * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License * at http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and * limitations under the License. * * The initial developer of the original code is David A. Hinds * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. * * Alternatively, the contents of this file may be used under the * terms of the GNU General Public License version 2 (the "GPL"), in which * case the provisions of the GPL are applicable instead of the * above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use * your version of this file under the MPL, indicate your decision by * deleting the provisions above and replace them with the notice and * other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file * under either the MPL or the GPL. */ #ifndef _LINUX_O2MICRO_H #define _LINUX_O2MICRO_H /* Additional PCI configuration registers */ #define O2_MUX_CONTROL 0x90 /* 32 bit */ #define O2_MUX_RING_OUT 0x0000000f #define O2_MUX_SKTB_ACTV 0x000000f0 #define O2_MUX_SCTA_ACTV_ENA 0x00000100 #define O2_MUX_SCTB_ACTV_ENA 0x00000200 #define O2_MUX_SER_IRQ_ROUTE 0x0000e000 #define O2_MUX_SER_PCI 0x00010000 #define O2_MUX_SKTA_TURBO 0x000c0000 /* for 6833, 6860 */ #define O2_MUX_SKTB_TURBO 0x00300000 #define O2_MUX_AUX_VCC_3V 0x00400000 #define O2_MUX_PCI_VCC_5V 0x00800000 #define O2_MUX_PME_MUX 0x0f000000 /* Additional ExCA registers */ #define O2_MODE_A 0x38 #define O2_MODE_A_2 0x26 /* for 6833B, 6860C */ #define O2_MODE_A_CD_PULSE 0x04 #define O2_MODE_A_SUSP_EDGE 0x08 #define O2_MODE_A_HOST_SUSP 0x10 #define O2_MODE_A_PWR_MASK 0x60 #define O2_MODE_A_QUIET 0x80 #define O2_MODE_B 0x39 #define O2_MODE_B_2 0x2e /* for 6833B, 6860C */ #define O2_MODE_B_IDENT 0x03 #define O2_MODE_B_ID_BSTEP 0x00 #define O2_MODE_B_ID_CSTEP 0x01 #define O2_MODE_B_ID_O2 0x02 #define O2_MODE_B_VS1 0x04 #define O2_MODE_B_VS2 0x08 #define O2_MODE_B_IRQ15_RI 0x80 #define O2_MODE_C 0x3a #define O2_MODE_C_DREQ_MASK 0x03 #define O2_MODE_C_DREQ_INPACK 0x01 #define O2_MODE_C_DREQ_WP 0x02 #define O2_MODE_C_DREQ_BVD2 0x03 #define O2_MODE_C_ZVIDEO 0x08 #define O2_MODE_C_IREQ_SEL 0x30 #define O2_MODE_C_MGMT_SEL 0xc0 #define O2_MODE_D 0x3b #define O2_MODE_D_IRQ_MODE 0x03 #define O2_MODE_D_PCI_CLKRUN 0x04 #define O2_MODE_D_CB_CLKRUN 0x08 #define O2_MODE_D_SKT_ACTV 0x20 #define O2_MODE_D_PCI_FIFO 0x40 /* for OZ6729, OZ6730 */ #define O2_MODE_D_W97_IRQ 0x40 #define O2_MODE_D_ISA_IRQ 0x80 #define O2_MHPG_DMA 0x3c #define O2_MHPG_CHANNEL 0x07 #define O2_MHPG_CINT_ENA 0x08 #define O2_MHPG_CSC_ENA 0x10 #define O2_FIFO_ENA 0x3d #define O2_FIFO_ZVIDEO_3 0x08 #define O2_FIFO_PCI_FIFO 0x10 #define O2_FIFO_POSTWR 0x40 #define O2_FIFO_BUFFER 0x80 #define O2_MODE_E 0x3e #define O2_MODE_E_MHPG_DMA 0x01 #define O2_MODE_E_SPKR_OUT 0x02 #define O2_MODE_E_LED_OUT 0x08 #define O2_MODE_E_SKTA_ACTV 0x10 #define O2_RESERVED1 0x94 #define O2_RESERVED2 0xD4 #define O2_RES_READ_PREFETCH 0x02 #define O2_RES_WRITE_BURST 0x08 static int o2micro_override(struct yenta_socket *socket) { /* * 'reserved' register at 0x94/D4. allows setting read prefetch and write * bursting. read prefetching for example makes the RME Hammerfall DSP * working. for some bridges it is at 0x94, for others at 0xD4. it's * ok to write to both registers on all O2 bridges. * from Eric Still, 02Micro. */ u8 a, b; bool use_speedup; if (PCI_FUNC(socket->dev->devfn) == 0) { a = config_readb(socket, O2_RESERVED1); b = config_readb(socket, O2_RESERVED2); dev_dbg(&socket->dev->dev, "O2: 0x94/0xD4: %02x/%02x\n", a, b); switch (socket->dev->device) { /* * older bridges have problems with both read prefetch and write * bursting depending on the combination of the chipset, bridge * and the cardbus card. so disable them to be on the safe side. */ case PCI_DEVICE_ID_O2_6729: case PCI_DEVICE_ID_O2_6730: case PCI_DEVICE_ID_O2_6812: case PCI_DEVICE_ID_O2_6832: case PCI_DEVICE_ID_O2_6836: case PCI_DEVICE_ID_O2_6933: use_speedup = false; break; default: use_speedup = true; break; } /* the user may override our decision */ if (strcasecmp(o2_speedup, "on") == 0) use_speedup = true; else if (strcasecmp(o2_speedup, "off") == 0) use_speedup = false; else if (strcasecmp(o2_speedup, "default") != 0) dev_warn(&socket->dev->dev, "O2: Unknown parameter, using 'default'"); if (use_speedup) { dev_info(&socket->dev->dev, "O2: enabling read prefetch/write burst\n"); config_writeb(socket, O2_RESERVED1, a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); config_writeb(socket, O2_RESERVED2, b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); } else { dev_info(&socket->dev->dev, "O2: disabling read prefetch/write burst\n"); config_writeb(socket, O2_RESERVED1, a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); config_writeb(socket, O2_RESERVED2, b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); } } return 0; } static void o2micro_restore_state(struct yenta_socket *socket) { /* * as long as read prefetch is the only thing in * o2micro_override, it's safe to call it from here */ o2micro_override(socket); } #endif /* _LINUX_O2MICRO_H */