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Diffstat (limited to '')
| -rw-r--r-- | private/ntos/ndis/madge/driver/hwi_eisa.c | 1054 |
1 files changed, 1054 insertions, 0 deletions
diff --git a/private/ntos/ndis/madge/driver/hwi_eisa.c b/private/ntos/ndis/madge/driver/hwi_eisa.c new file mode 100644 index 000000000..741a8dadf --- /dev/null +++ b/private/ntos/ndis/madge/driver/hwi_eisa.c @@ -0,0 +1,1054 @@ +/**************************************************************************** +* +* HWI_EISA.C : Part of the FASTMAC TOOL-KIT (FTK) +* +* HARDWARE INTERFACE MODULE FOR EISA CARDS +* +* Copyright (c) Madge Networks Ltd. 1990-1994 +* +* COMPANY CONFIDENTIAL +* +* +***************************************************************************** +* +* The purpose of the Hardware Interface (HWI) is to supply an adapter card +* independent interface to any driver. It performs nearly all of the +* functions that involve affecting SIF registers on the adapter cards. +* This includes downloading code to, initializing, and removing adapters. +* +* The HWI_EISA.C module contains the routines specific to 16/4 EISA mk1 +* and mk2 cards which are necessary to install an adapter, to initialize +* an adapter, to remove an adapter and to handle interrupts on an adapter. +* Also supported are EISA Bridge nodes. +* +****************************************************************************/ + +/*--------------------------------------------------------------------------- +| +| DEFINITIONS +| +---------------------------------------------------------------------------*/ + +#include "ftk_defs.h" + +/*--------------------------------------------------------------------------- +| +| MODULE ENTRY POINTS +| +---------------------------------------------------------------------------*/ + +#include "ftk_intr.h" /* routines internal to FTK */ +#include "ftk_extr.h" /* routines provided or used by external FTK user */ + +#ifndef FTK_NO_EISA + +/*--------------------------------------------------------------------------- +| +| LOCAL PROCEDURES +| +---------------------------------------------------------------------------*/ + +local WBOOLEAN +hwi_eisa_valid_io_location( + WORD io_location + ); + +#ifndef FTK_NO_PROBE + +local WORD +hwi_eisa_get_irq_channel( + WORD io_location + ); + +#endif + +local WBOOLEAN +hwi_eisa_valid_dma_channel( + WORD dma_channel + ); + +local WBOOLEAN +hwi_eisa_valid_irq_channel( + WORD irq_channel + ); + +local WBOOLEAN +hwi_eisa_valid_transfer_mode( + UINT transfer_mode + ); + +#ifndef FTK_NO_PROBE +/**************************************************************************** +* +* hwi_eisa_probe_card +* =================== +* +* +* PARAMETERS (passed by hwi_probe_adapter) : +* ========================================== +* +* PROBE * resources +* +* resources is an array structures used to identify and record specific +* information about adapters found. +* +* UINT length +* +* length is the number of structures pointed to by reources. +* +* WORD * valid_locations +* +* valid_locations is an array of IO locations to examine for the presence +* of an adapter. For EISA adapters with should be a subset of +* {0x1000, 0x2000, 0x3000, 0x4000, 0x5000, 0x6000, 0x7000, 0x8000, 0x9000}. +* +* UINT number_locations +* +* This is the number of IO locations in the above list. +* +* BODY : +* ====== +* +* The hwi_eisa_probe_card routine is called by hwi_probe_adapter. It +* reads the id registers to find the type of card and also reads the IRQ. +* +* +* RETURNS : +* ========= +* +* The routine returns the number of adapters found, or PROBE_FAILURE if +* there's a problem. +* +****************************************************************************/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_probe_card) +#endif + +export UINT +hwi_eisa_probe_card( + PROBE * resources, + UINT length, + WORD * valid_locations, + UINT number_locations + ) +{ + WBOOLEAN card_found; + WORD id_reg_0; + WORD id_reg_1; + WORD control_x; + WORD bmic_3; + UINT i; + UINT j; + + /* + * Check the bounds are sensible. + */ + + if(length <= 0 || number_locations <= 0) + { + return PROBE_FAILURE; + } + + for(i = 0; i < number_locations; i++) + { + if(!hwi_eisa_valid_io_location(valid_locations[i])) + { + return PROBE_FAILURE; + } + } + + /* + * j is the number of adapters found. Unsurprisingly we zero it. + */ + + j = 0; + + for(i = 0; i < number_locations; i++) + { + /* + * If we run out of PROBE structures then bomb out. + */ + + if(j >= length) + { + return(j); + } + + /* + * Set up the EISA registers. + */ + + id_reg_0 = valid_locations[i] + EISA_ID_REGISTER_0; + id_reg_1 = valid_locations[i] + EISA_ID_REGISTER_1; + control_x = valid_locations[i] + EISA_CONTROLX_REGISTER; + bmic_3 = valid_locations[i] + EISA_BMIC_REGISTER_3; + +#ifndef FTK_NO_IO_ENABLE + macro_probe_enable_io(valid_locations[i], EISA_IO_RANGE); +#endif + card_found = FALSE; + + /* + * Look for an EISA card. + */ + + if (sys_probe_insw(id_reg_0) == EISA_ID0_MDG_CODE) + { + if (sys_probe_insw(id_reg_1) == EISA_ID1_MK1_MDG_CODE) + { + resources[j].adapter_ram_size = 128; + card_found = TRUE; + } + else if (sys_probe_insw(id_reg_1) == EISA_ID1_MK2_MDG_CODE) + { + resources[j].adapter_ram_size = 256; + card_found = TRUE; + } + else if (sys_probe_insw(id_reg_1) == EISA_ID1_BRIDGE_MDG_CODE) + { + resources[j].adapter_ram_size = 256; + card_found = TRUE; + } + else if (sys_probe_insw(id_reg_1) == EISA_ID1_MK3_MDG_CODE) + { + resources[j].adapter_ram_size = 256; + card_found = TRUE; + } + } + + + if(card_found) + { + /* + * Wayhay! We found one. Let's set up some values. + */ + + resources[j].io_location = valid_locations[i]; + resources[j].adapter_card_bus_type = ADAPTER_CARD_EISA_BUS_TYPE; + resources[j].adapter_card_type = ADAPTER_CARD_TYPE_16_4_EISA; + resources[j].interrupt_number = hwi_eisa_get_irq_channel( + valid_locations[i]); + resources[j].dma_channel = 0; + resources[j].transfer_mode = DMA_DATA_TRANSFER_MODE; + + /* + * Increment j to point to the next structure and try again. + */ + + j++; + } +#ifndef FTK_NO_IO_ENABLE + macro_probe_disable_io(resources->io_location, EISA_IO_RANGE); +#endif + } + + return(j); +} +#endif + +/**************************************************************************** +* +* hwi_eisa_install_card +* ===================== +* +* +* PARAMETERS (passed by hwi_install_adapter) : +* ============================================ +* +* ADAPTER * adapter +* +* This structure is used to identify and record specific information about +* the required adapter. +* +* DOWNLOAD_IMAGE * download_image +* +* This is the code to be downloaded to the adapter. The image must be of +* the correct type i.e. must be downloadable into the adapter. If the +* pointer is 0 downloading is not done. +* +* +* BODY : +* ====== +* +* The hwi_eisa_install_card routine is called by hwi_install_adapter. It +* sets up the adapter card and downloads the required code to it. Firstly, +* it checks there is a valid adapter at the required IO address. If so it +* sets up and checks numerous on-board registers for correct operation. +* The node address can not be read from the BIA PROM at this stage. +* +* Then, it halts the EAGLE, downloads the code, restarts the EAGLE and +* waits up to 3 seconds for a valid bring-up code. If interrupts are +* required, these are enabled by operating system specific calls. There is +* no need to explicitly enable DMA. Note PIO can not be used. +* +* +* RETURNS : +* ========= +* +* The routine returns TRUE if it succeeds. If this routine fails (returns +* FALSE) then a subsequent call to driver_explain_error, with the adapter +* handle corresponding to the adapter parameter used here, will give an +* explanation. +* +****************************************************************************/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_install_card) +#endif + +export WBOOLEAN +hwi_eisa_install_card( + ADAPTER * adapter, + DOWNLOAD_IMAGE * download_image + ) +{ + ADAPTER_HANDLE handle = adapter->adapter_handle; + WORD id_reg_0 = adapter->io_location + + EISA_ID_REGISTER_0; + WORD id_reg_1 = adapter->io_location + + EISA_ID_REGISTER_1; + WORD control_x = adapter->io_location + + EISA_CONTROLX_REGISTER; + WORD bmic_3 = adapter->io_location + + EISA_BMIC_REGISTER_3; + WORD sif_base; + + /* + * Check the IO location is valid. + */ + + if(!hwi_eisa_valid_io_location(adapter->io_location)) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_02_BAD_IO_LOCATION; + + return FALSE; + } + + /* + * Check the transfer mode is valid. + */ + + if(!hwi_eisa_valid_transfer_mode(adapter->transfer_mode)) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_02_BAD_IO_LOCATION; + + return FALSE; + } + + /* + * Check the DMA channel is valid. + */ + + if(!hwi_eisa_valid_dma_channel(adapter->dma_channel)) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_04_BAD_DMA_CHANNEL; + + return FALSE; + } + + /* + * Check the IRQ is valid. + */ + + if(!hwi_eisa_valid_irq_channel(adapter->interrupt_number)) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_03_BAD_INTERRUPT_NUMBER; + + return FALSE; + } + + /* + * Save IO locations of SIF registers. + */ + + sif_base = adapter->io_location + EISA_FIRST_SIF_REGISTER; + + adapter->sif_dat = sif_base + EAGLE_SIFDAT; + adapter->sif_datinc = sif_base + EAGLE_SIFDAT_INC; + adapter->sif_adr = sif_base + EAGLE_SIFADR; + adapter->sif_int = sif_base + EAGLE_SIFINT; + adapter->sif_acl = sif_base + EISA_EAGLE_SIFACL; + adapter->sif_adr2 = sif_base + EISA_EAGLE_SIFADR_2; + adapter->sif_adx = sif_base + EISA_EAGLE_SIFADX; + adapter->sif_dmalen = sif_base + EISA_EAGLE_DMALEN; + + adapter->io_range = EISA_IO_RANGE; + +#ifndef FTK_NO_IO_ENABLE + macro_enable_io(adapter); +#endif + + adapter->adapter_card_type = ADAPTER_CARD_TYPE_16_4_EISA; + + if (sys_insw( handle, id_reg_0) == EISA_ID0_MDG_CODE) + { + if (sys_insw( handle, id_reg_1) == EISA_ID1_MK1_MDG_CODE) + { + adapter->adapter_card_revision = ADAPTER_CARD_16_4_EISA_MK1; + adapter->adapter_ram_size = 128; + } + else if (sys_insw( handle, id_reg_1) == EISA_ID1_MK2_MDG_CODE) + { + adapter->adapter_card_revision = ADAPTER_CARD_16_4_EISA_MK2; + adapter->adapter_ram_size = 256; + } + else if (sys_insw( handle, id_reg_1) == EISA_ID1_BRIDGE_MDG_CODE) + { + adapter->adapter_card_revision = ADAPTER_CARD_16_4_EISA_BRIDGE; + adapter->adapter_ram_size = 256; + } + else if (sys_insw( handle, id_reg_1) == EISA_ID1_MK3_MDG_CODE) + { + adapter->adapter_card_revision = ADAPTER_CARD_16_4_EISA_MK3; + adapter->adapter_ram_size = 256; + } + else + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_05_ADAPTER_NOT_FOUND; +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + return FALSE; + } + } + + /* + * Check that the adapter card is enabled. + * If not then fill in error record and return. + */ + + if ((sys_insb( handle, control_x) & EISA_CTRLX_CDEN) == 0) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_0D_CARD_NOT_ENABLED; +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + return FALSE; + } + + /* + * Check that a speed has been selected for the card. + * If not then fill in error record and return. + */ + + if ((sys_insb( handle, bmic_3) & EISA_BMIC3_SPD) == 0) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_0E_NO_SPEED_SELECTED; +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + return FALSE; + } + + /* + * Discover whether interrupts are edge or level triggered. + */ + + if ((sys_insb( handle, bmic_3) & EISA_BMIC3_EDGE) == 0) + { + adapter->edge_triggered_ints = TRUE; + } + else + { + adapter->edge_triggered_ints = FALSE; + } + + /* + * Machine reset does not affect speed or media setting of EISA cards. + * Also we cannot find adapter node address at this stage for EISA cards. + * The adapter permanent address remains all zeroes. + * + * There are no other special control registers to set for EISA cards + * and no issue of bringing adapter out of reset state. + */ + + /* + * Halt the eagle. No need to page in extended SIF registers for + * EISA cards. + */ + + hwi_halt_eagle(adapter); + + /* + * download code to adapter. + * View download image as a sequence of download records. Pass address + * of routine to set up DIO addresses on EISA cards. If routine fails + * return failure (error record already filled in). + */ + + if (!hwi_download_code( + adapter, + (DOWNLOAD_RECORD *) download_image, + hwi_eisa_set_dio_address)) + { + return FALSE; + } + + /* + * Start the eagle. + */ + + hwi_start_eagle(adapter); + + /* + * Wait for a valid bring up code, may wait 3 seconds. + * If routine fails return failure (error record already filled in). + */ + + if (!hwi_get_bring_up_code( adapter)) + { +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + return(FALSE); + } + + /* + * Set DIO address to point to EAGLE DATA page 0x10000L. + */ + + hwi_eisa_set_dio_address(adapter, DIO_LOCATION_EAGLE_DATA_PAGE); + + /* + * Set maximum frame size from the ring speed. + */ + + adapter->max_frame_size = hwi_get_max_frame_size(adapter); + + /* + * Set the ring speed. + */ + + adapter->ring_speed = hwi_get_ring_speed(adapter); + + /* + * If we have a mark 3 adapter then we need to initialise the + * VRAM by writing 0xffff to 0xc0000 in DIO space. Remember to + * to set the extended address register back to the Eagle + * data page. + */ + + if (adapter->adapter_card_revision == ADAPTER_CARD_16_4_EISA_MK3) + { + hwi_eisa_set_dio_address(adapter, DIO_LOCATION_EISA_VRAM_ENABLE); + sys_outsw(handle, adapter->sif_dat, EISA_VRAM_ENABLE_WORD); + hwi_eisa_set_dio_address(adapter, DIO_LOCATION_EAGLE_DATA_PAGE); + } + + /* + * If not in polling mode then set up interrupts. + * interrupts_on field is used when disabling interrupts for adapter. + */ + + if (adapter->interrupt_number != POLLING_INTERRUPTS_MODE) + { + adapter->interrupts_on = + sys_enable_irq_channel( handle, adapter->interrupt_number); + + if (!adapter->interrupts_on) + { + adapter->error_record.type = ERROR_TYPE_HWI; + adapter->error_record.value = HWI_E_0B_FAIL_IRQ_ENABLE; +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + return FALSE; + } + } + else + { + adapter->interrupts_on = TRUE; + } + + /* + * No need to explicitly enable interrupts at adapter for EISA card + * and no need to explicitly set up DMA channel. + */ + +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + return TRUE; + +} + + +/**************************************************************************** +* +* hwi_eisa_interrupt_handler +* ========================== +* +* +* PARAMETERS (passed by hwi_interrupt_entry) : +* ============================================ +* +* ADAPTER * adapter +* +* This structure is used to identify and record specific information about +* the required adapter. +* +* +* BODY : +* ====== +* +* The hwi_eisa_interrupt_handler routine is called, when an interrupt +* occurs, by hwi_interrupt_entry. It checks to see if a particular card +* has interrupted. The interrupt could be generated by the SIF only. +* There are no PIO interupts on EISA cards. Note it could in fact be the +* case that no interrupt has occured on the particular adapter being +* checked. +* +* On SIF interrupts, the interrupt is acknowledged and cleared. The value +* in the SIF interrupt register is recorded in order to pass it to the +* driver_interrupt_entry routine (along with the adapter details). +* +* +* RETURNS : +* ========= +* +* The routine always successfully completes. +* +****************************************************************************/ + +#ifdef FTK_IRQ_FUNCTION +#pragma FTK_IRQ_FUNCTION(hwi_eisa_interrupt_handler) +#endif + +export void +hwi_eisa_interrupt_handler( + ADAPTER * adapter + ) +{ + ADAPTER_HANDLE handle = adapter->adapter_handle; + WORD control_x = adapter->io_location + + EISA_CONTROLX_REGISTER; + WORD sifint_register = adapter->sif_int; + WORD sifint_value; + WORD sifint_tmp; + + /* + * Inform system about the IO ports we are going to access. + * Enable maximum number of IO locations used by any adapter card. + * Do this so at driver level we can disable IO not knowing the adapter + * type. + */ + +#ifndef FTK_NO_IO_ENABLE + macro_enable_io(adapter); +#endif + + /* + * Check for SIF interrupt. (We don't get PIO interrupts on EISA cards). + */ + + if ((sys_insw(handle, sifint_register) & + FASTMAC_SIFINT_IRQ_DRIVER) != 0) + { + /* + * A SIF interrupt has occurred. This could be an SRB free, + * an adapter check or a received frame interrupt + + * No need to acknowledge interrupt at EISA card. + * Clear EAGLE_SIFINT_HOST_IRQ to acknowledge interrupt at SIF. + + * WARNING: Do NOT reorder the clearing of the SIFINT register with + * the reading of it. If SIFINT is cleared after reading it, any + * interrupts raised after reading it will be lost. Admittedly + * this is a small time frame, but it is important. + */ + + sys_outsw(handle, adapter->sif_int, 0); + + /* + * Record the EAGLE SIF interrupt register value. + + * WARNING: Continue to read the SIFINT register until it is stable + * because of a potential problem involving the host reading the + * register after the adapter has written the low byte of it, but + * before it has written the high byte. Failure to wait for the + * SIFINT register to settle can cause spurious interrupts. + */ + + sifint_value = sys_insw(handle, adapter->sif_int); + do + { + sifint_tmp = sifint_value; + sifint_value = sys_insw( + handle, + adapter->sif_int); + } + while (sifint_tmp != sifint_value); + + /* + * Acknowledge/clear interrupt at interrupt controller. + */ + +#ifndef FTK_NO_CLEAR_IRQ + sys_clear_controller_interrupt(handle, adapter->interrupt_number); +#endif + + /* + * No need regenerate any interrupts when using level sensitive. + * For edge triggered we need to disable\enable board to regenerate + * interrupts. + */ + + if (adapter->edge_triggered_ints) + { + macro_clearb_bit(handle, control_x, EISA_CTRLX_CDEN); + macro_setb_bit(handle, control_x, EISA_CTRLX_CDEN); + } + + /* + * Call driver with details of SIF interrupt. + */ + + driver_interrupt_entry(handle, adapter, sifint_value); + + } + + /* + * Let the system know we have finished accessing the IO ports. + */ + +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif + +} + + +/**************************************************************************** +* +* hwi_eisa_remove_card +* ==================== +* +* +* PARAMETERS (passed by hwi_remove_adapter) : +* =========================================== +* +* ADAPTER * adapter +* +* This structure is used to identify and record specific information about +* the required adapter. +* +* +* BODY : +* ====== +* +* The hwi_eisa_remove_card routine is called by hwi_remove_adapter. It +* disables interrupts if they are being used. It also resets the adapter. +* Note there is no need to explicitly disable DMA channels. +* +* +* RETURNS : +* ========= +* +* The routine always successfully completes. +* +****************************************************************************/ + +#ifdef FTK_RES_FUNCTION +#pragma FTK_RES_FUNCTION(hwi_eisa_remove_card) +#endif + +export void +hwi_eisa_remove_card( + ADAPTER * adapter + ) +{ + ADAPTER_HANDLE handle = adapter->adapter_handle; + WORD sif_acontrol = adapter->sif_acl; + +#ifndef FTK_NO_IO_ENABLE + macro_enable_io(adapter); +#endif + + /* + * Disable interrupts. Only need to do this if interrupts successfully + * enabled. + * Interrupts must be disabled at adapter before unpatching interrupt. + * Even in polling mode we must turn off interrupts at adapter. + */ + + if (adapter->interrupts_on) + { + macro_clearw_bit( handle, sif_acontrol, EAGLE_SIFACL_SINTEN); + + if (adapter->interrupt_number != POLLING_INTERRUPTS_MODE) + { + sys_disable_irq_channel(handle, adapter->interrupt_number); + } + adapter->interrupts_on = FALSE; + + } + + /* + * Perform adapter reset, set EAGLE_SIFACL_ARESET high. + */ + + macro_setw_bit( handle, sif_acontrol, EAGLE_SIFACL_ARESET); + +#ifndef FTK_NO_IO_ENABLE + macro_disable_io(adapter); +#endif +} + + +/**************************************************************************** +* +* hwi_eisa_set_dio_address +* ======================== +* +* The hwi_eisa_set_dio_address routine is used, with EISA cards, for +* putting a 32 bit DIO address into the SIF DIO address and extended DIO +* address registers. Note that the extended address register should be +* loaded first. +* +****************************************************************************/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_set_dio_address) +#endif + +export void +hwi_eisa_set_dio_address( + ADAPTER * adapter, + DWORD dio_address + ) +{ + ADAPTER_HANDLE handle = adapter->adapter_handle; + WORD sif_dio_adr = adapter->sif_adr; + WORD sif_dio_adrx = adapter->sif_adx; + + /* + * Load extended DIO address register with top 16 bits of address. + * Always load extended address register first. + * Note EISA cards have single page of all SIF registers, hence do not + * need page in certain SIF registers. + */ + + sys_outsw( + handle, + sif_dio_adrx, + (WORD)(dio_address >> 16)); + + /* + * Load DIO address register with low 16 bits of address. + */ + + sys_outsw( + handle, + sif_dio_adr, + (WORD)(dio_address & 0x0000FFFF)); + +} + + +/*--------------------------------------------------------------------------- +| +| LOCAL PROCEDURES +| +---------------------------------------------------------------------------*/ + +/*--------------------------------------------------------------------------- +| +| hwi_eisa_valid_io_location +| ========================== +| +| The hwi_eisa_valid_io_location routine checks to see if the user has +| supplied a valid IO location for an EISA adapter card. +| +---------------------------------------------------------------------------*/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_valid_io_location) +#endif + +export WBOOLEAN +hwi_eisa_valid_io_location( + WORD io_location + ) +{ + WBOOLEAN io_valid; + + switch (io_location) + { + case 0x1000 : + case 0x2000 : + case 0x3000 : + case 0x4000 : + case 0x5000 : + case 0x6000 : + case 0x7000 : + case 0x8000 : + case 0x9000 : + case 0xA000 : + case 0xB000 : + case 0xC000 : + case 0xD000 : + case 0xE000 : + case 0xF000 : + + io_valid = TRUE; + break; + + default : + + io_valid = FALSE; + break; + + } + + return(io_valid); +} + + +/*--------------------------------------------------------------------------- +| +| hwi_eisa_valid_irq_channel +| ========================== +| +| The hwi_eisa_valid_irq_channel routine checks to see if the user has +| supplied a sensible IRQ for an EISA adapter card. +| +---------------------------------------------------------------------------*/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_valid_irq_channel) +#endif + +export WBOOLEAN +hwi_eisa_valid_irq_channel( + WORD irq_channel + ) +{ + WBOOLEAN int_valid = TRUE; + + + if (irq_channel != POLLING_INTERRUPTS_MODE) + { + switch (irq_channel) + { + case 3: + case 9: + case 10: + case 11: + case 12: + case 15: + break; + + default: + int_valid = FALSE; + } + } + + return int_valid; +} + + +/*--------------------------------------------------------------------------- +| +| hwi_eisa_valid_dma_channel +| ========================== +| +| The hwi_eisa_valid_dma_channel routine checks to see if the user has +| supplied a sensible dma channel for an EISA adapter card. +| +---------------------------------------------------------------------------*/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_valid_dma_channel) +#endif + +export WBOOLEAN +hwi_eisa_valid_dma_channel( + WORD dma_channel + ) +{ + return (dma_channel == 0); +} + + +/*--------------------------------------------------------------------------- +| +| hwi_eisa_valid_transfer_mode +| ============================ +| +| The hwi_eisa_valid_transfer_mode routine checks to see if the user has +| supplied a sensible transfer mode for an EISA adapter card. That means DMA +| at the moment. +| +---------------------------------------------------------------------------*/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_valid_transfer_mode) +#endif + +export WBOOLEAN +hwi_eisa_valid_transfer_mode( + UINT transfer_mode + ) +{ + return (transfer_mode == DMA_DATA_TRANSFER_MODE); +} + +#ifndef FTK_NO_PROBE +/*--------------------------------------------------------------------------- +| +| hwi_eisa_get_irq_channel +| ======================== +| +| The hwi_eisa_get_irq_channel routine determines the interrupt number +| that an EISA card is using. It does this by looking at one of the BMIC +| registers. It always succeeds in finding the interrupt number being +| used. +| +---------------------------------------------------------------------------*/ + +#ifdef FTK_INIT_FUNCTION +#pragma FTK_INIT_FUNCTION(hwi_eisa_get_irq_channel) +#endif + +local WORD +hwi_eisa_get_irq_channel( + WORD io_location + ) +{ + WORD bmic_3 = io_location + EISA_BMIC_REGISTER_3; + WORD irq; + + /* + * The interrupt number is in four bits (3,2,1,0) in BMIC register 3. + */ + + irq = sys_probe_insb(bmic_3) & EISA_BMIC3_IRQSEL; + + /* + * Interrupt 2 needs to be changed to 9 for system routines. + */ + + if (irq == 2) + { + irq = 9; + } + + /* + * Return the discovered interrupt number. + */ + + return(irq); +} +#endif + +#endif + +/******** End of HWI_EISA.C ************************************************/ |