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kernel-fxtec-pro1x/arch/alpha/kernel/smc37c669.c
Masahiro Yamada 203308a5d1 alpha: squash lines for immediate return 
Remove unneeded variables and assignments.

While we are here, fix the coding style of SMC37c669_read_config():
  - replace whitespaces at the start of lines with tabs
  - remove unneeded whitespaces around parentheses

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
2017-09-04 12:04:32 -07:00

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/*
* SMC 37C669 initialization code
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <asm/hwrpb.h>
#include <asm/io.h>
#include <asm/segment.h>
#if 0
# define DBG_DEVS(args) printk args
#else
# define DBG_DEVS(args)
#endif
#define KB 1024
#define MB (1024*KB)
#define GB (1024*MB)
#define SMC_DEBUG 0
/* File: smcc669_def.h
*
* Copyright (C) 1997 by
* Digital Equipment Corporation, Maynard, Massachusetts.
* All rights reserved.
*
* This software is furnished under a license and may be used and copied
* only in accordance of the terms of such license and with the
* inclusion of the above copyright notice. This software or any other
* copies thereof may not be provided or otherwise made available to any
* other person. No title to and ownership of the software is hereby
* transferred.
*
* The information in this software is subject to change without notice
* and should not be construed as a commitment by Digital Equipment
* Corporation.
*
* Digital assumes no responsibility for the use or reliability of its
* software on equipment which is not supplied by Digital.
*
*
* Abstract:
*
* This file contains header definitions for the SMC37c669
* Super I/O controller.
*
* Author:
*
* Eric Rasmussen
*
* Modification History:
*
* er 28-Jan-1997 Initial Entry
*/
#ifndef __SMC37c669_H
#define __SMC37c669_H
/*
** Macros for handling device IRQs
**
** The mask acts as a flag used in mapping actual ISA IRQs (0 - 15)
** to device IRQs (A - H).
*/
#define SMC37c669_DEVICE_IRQ_MASK 0x80000000
#define SMC37c669_DEVICE_IRQ( __i ) \
((SMC37c669_DEVICE_IRQ_MASK) | (__i))
#define SMC37c669_IS_DEVICE_IRQ(__i) \
(((__i) & (SMC37c669_DEVICE_IRQ_MASK)) == (SMC37c669_DEVICE_IRQ_MASK))
#define SMC37c669_RAW_DEVICE_IRQ(__i) \
((__i) & ~(SMC37c669_DEVICE_IRQ_MASK))
/*
** Macros for handling device DRQs
**
** The mask acts as a flag used in mapping actual ISA DMA
** channels to device DMA channels (A - C).
*/
#define SMC37c669_DEVICE_DRQ_MASK 0x80000000
#define SMC37c669_DEVICE_DRQ(__d) \
((SMC37c669_DEVICE_DRQ_MASK) | (__d))
#define SMC37c669_IS_DEVICE_DRQ(__d) \
(((__d) & (SMC37c669_DEVICE_DRQ_MASK)) == (SMC37c669_DEVICE_DRQ_MASK))
#define SMC37c669_RAW_DEVICE_DRQ(__d) \
((__d) & ~(SMC37c669_DEVICE_DRQ_MASK))
#define SMC37c669_DEVICE_ID 0x3
/*
** SMC37c669 Device Function Definitions
*/
#define SERIAL_0 0
#define SERIAL_1 1
#define PARALLEL_0 2
#define FLOPPY_0 3
#define IDE_0 4
#define NUM_FUNCS 5
/*
** Default Device Function Mappings
*/
#define COM1_BASE 0x3F8
#define COM1_IRQ 4
#define COM2_BASE 0x2F8
#define COM2_IRQ 3
#define PARP_BASE 0x3BC
#define PARP_IRQ 7
#define PARP_DRQ 3
#define FDC_BASE 0x3F0
#define FDC_IRQ 6
#define FDC_DRQ 2
/*
** Configuration On/Off Key Definitions
*/
#define SMC37c669_CONFIG_ON_KEY 0x55
#define SMC37c669_CONFIG_OFF_KEY 0xAA
/*
** SMC 37c669 Device IRQs
*/
#define SMC37c669_DEVICE_IRQ_A ( SMC37c669_DEVICE_IRQ( 0x01 ) )
#define SMC37c669_DEVICE_IRQ_B ( SMC37c669_DEVICE_IRQ( 0x02 ) )
#define SMC37c669_DEVICE_IRQ_C ( SMC37c669_DEVICE_IRQ( 0x03 ) )
#define SMC37c669_DEVICE_IRQ_D ( SMC37c669_DEVICE_IRQ( 0x04 ) )
#define SMC37c669_DEVICE_IRQ_E ( SMC37c669_DEVICE_IRQ( 0x05 ) )
#define SMC37c669_DEVICE_IRQ_F ( SMC37c669_DEVICE_IRQ( 0x06 ) )
/* SMC37c669_DEVICE_IRQ_G *** RESERVED ***/
#define SMC37c669_DEVICE_IRQ_H ( SMC37c669_DEVICE_IRQ( 0x08 ) )
/*
** SMC 37c669 Device DMA Channel Definitions
*/
#define SMC37c669_DEVICE_DRQ_A ( SMC37c669_DEVICE_DRQ( 0x01 ) )
#define SMC37c669_DEVICE_DRQ_B ( SMC37c669_DEVICE_DRQ( 0x02 ) )
#define SMC37c669_DEVICE_DRQ_C ( SMC37c669_DEVICE_DRQ( 0x03 ) )
/*
** Configuration Register Index Definitions
*/
#define SMC37c669_CR00_INDEX 0x00
#define SMC37c669_CR01_INDEX 0x01
#define SMC37c669_CR02_INDEX 0x02
#define SMC37c669_CR03_INDEX 0x03
#define SMC37c669_CR04_INDEX 0x04
#define SMC37c669_CR05_INDEX 0x05
#define SMC37c669_CR06_INDEX 0x06
#define SMC37c669_CR07_INDEX 0x07
#define SMC37c669_CR08_INDEX 0x08
#define SMC37c669_CR09_INDEX 0x09
#define SMC37c669_CR0A_INDEX 0x0A
#define SMC37c669_CR0B_INDEX 0x0B
#define SMC37c669_CR0C_INDEX 0x0C
#define SMC37c669_CR0D_INDEX 0x0D
#define SMC37c669_CR0E_INDEX 0x0E
#define SMC37c669_CR0F_INDEX 0x0F
#define SMC37c669_CR10_INDEX 0x10
#define SMC37c669_CR11_INDEX 0x11
#define SMC37c669_CR12_INDEX 0x12
#define SMC37c669_CR13_INDEX 0x13
#define SMC37c669_CR14_INDEX 0x14
#define SMC37c669_CR15_INDEX 0x15
#define SMC37c669_CR16_INDEX 0x16
#define SMC37c669_CR17_INDEX 0x17
#define SMC37c669_CR18_INDEX 0x18
#define SMC37c669_CR19_INDEX 0x19
#define SMC37c669_CR1A_INDEX 0x1A
#define SMC37c669_CR1B_INDEX 0x1B
#define SMC37c669_CR1C_INDEX 0x1C
#define SMC37c669_CR1D_INDEX 0x1D
#define SMC37c669_CR1E_INDEX 0x1E
#define SMC37c669_CR1F_INDEX 0x1F
#define SMC37c669_CR20_INDEX 0x20
#define SMC37c669_CR21_INDEX 0x21
#define SMC37c669_CR22_INDEX 0x22
#define SMC37c669_CR23_INDEX 0x23
#define SMC37c669_CR24_INDEX 0x24
#define SMC37c669_CR25_INDEX 0x25
#define SMC37c669_CR26_INDEX 0x26
#define SMC37c669_CR27_INDEX 0x27
#define SMC37c669_CR28_INDEX 0x28
#define SMC37c669_CR29_INDEX 0x29
/*
** Configuration Register Alias Definitions
*/
#define SMC37c669_DEVICE_ID_INDEX SMC37c669_CR0D_INDEX
#define SMC37c669_DEVICE_REVISION_INDEX SMC37c669_CR0E_INDEX
#define SMC37c669_FDC_BASE_ADDRESS_INDEX SMC37c669_CR20_INDEX
#define SMC37c669_IDE_BASE_ADDRESS_INDEX SMC37c669_CR21_INDEX
#define SMC37c669_IDE_ALTERNATE_ADDRESS_INDEX SMC37c669_CR22_INDEX
#define SMC37c669_PARALLEL0_BASE_ADDRESS_INDEX SMC37c669_CR23_INDEX
#define SMC37c669_SERIAL0_BASE_ADDRESS_INDEX SMC37c669_CR24_INDEX
#define SMC37c669_SERIAL1_BASE_ADDRESS_INDEX SMC37c669_CR25_INDEX
#define SMC37c669_PARALLEL_FDC_DRQ_INDEX SMC37c669_CR26_INDEX
#define SMC37c669_PARALLEL_FDC_IRQ_INDEX SMC37c669_CR27_INDEX
#define SMC37c669_SERIAL_IRQ_INDEX SMC37c669_CR28_INDEX
/*
** Configuration Register Definitions
**
** The INDEX (write only) and DATA (read/write) ports are effective
** only when the chip is in the Configuration State.
*/
typedef struct _SMC37c669_CONFIG_REGS {
unsigned char index_port;
unsigned char data_port;
} SMC37c669_CONFIG_REGS;
/*
** CR00 - default value 0x28
**
** IDE_EN (CR00<1:0>):
** 0x - 30ua pull-ups on nIDEEN, nHDCS0, NHDCS1
** 11 - IRQ_H available as IRQ output,
** IRRX2, IRTX2 available as alternate IR pins
** 10 - nIDEEN, nHDCS0, nHDCS1 used to control IDE
**
** VALID (CR00<7>):
** A high level on this software controlled bit can
** be used to indicate that a valid configuration
** cycle has occurred. The control software must
** take care to set this bit at the appropriate times.
** Set to zero after power up. This bit has no
** effect on any other hardware in the chip.
**
*/
typedef union _SMC37c669_CR00 {
unsigned char as_uchar;
struct {
unsigned ide_en : 2; /* See note above */
unsigned reserved1 : 1; /* RAZ */
unsigned fdc_pwr : 1; /* 1 = supply power to FDC */
unsigned reserved2 : 3; /* Read as 010b */
unsigned valid : 1; /* See note above */
} by_field;
} SMC37c669_CR00;
/*
** CR01 - default value 0x9C
*/
typedef union _SMC37c669_CR01 {
unsigned char as_uchar;
struct {
unsigned reserved1 : 2; /* RAZ */
unsigned ppt_pwr : 1; /* 1 = supply power to PPT */
unsigned ppt_mode : 1; /* 1 = Printer mode, 0 = EPP */
unsigned reserved2 : 1; /* Read as 1 */
unsigned reserved3 : 2; /* RAZ */
unsigned lock_crx: 1; /* Lock CR00 - CR18 */
} by_field;
} SMC37c669_CR01;
/*
** CR02 - default value 0x88
*/
typedef union _SMC37c669_CR02 {
unsigned char as_uchar;
struct {
unsigned reserved1 : 3; /* RAZ */
unsigned uart1_pwr : 1; /* 1 = supply power to UART1 */
unsigned reserved2 : 3; /* RAZ */
unsigned uart2_pwr : 1; /* 1 = supply power to UART2 */
} by_field;
} SMC37c669_CR02;
/*
** CR03 - default value 0x78
**
** CR03<7> CR03<2> Pin 94
** ------- ------- ------
** 0 X DRV2 (input)
** 1 0 ADRX
** 1 1 IRQ_B
**
** CR03<6> CR03<5> Op Mode
** ------- ------- -------
** 0 0 Model 30
** 0 1 PS/2
** 1 0 Reserved
** 1 1 AT Mode
*/
typedef union _SMC37c669_CR03 {
unsigned char as_uchar;
struct {
unsigned pwrgd_gamecs : 1; /* 1 = PWRGD, 0 = GAMECS */
unsigned fdc_mode2 : 1; /* 1 = Enhanced Mode 2 */
unsigned pin94_0 : 1; /* See note above */
unsigned reserved1 : 1; /* RAZ */
unsigned drvden : 1; /* 1 = high, 0 - output */
unsigned op_mode : 2; /* See note above */
unsigned pin94_1 : 1; /* See note above */
} by_field;
} SMC37c669_CR03;
/*
** CR04 - default value 0x00
**
** PP_EXT_MODE:
** If CR01<PP_MODE> = 0 and PP_EXT_MODE =
** 00 - Standard and Bidirectional
** 01 - EPP mode and SPP
** 10 - ECP mode
** In this mode, 2 drives can be supported
** directly, 3 or 4 drives must use external
** 4 drive support. SPP can be selected
** through the ECR register of ECP as mode 000.
** 11 - ECP mode and EPP mode
** In this mode, 2 drives can be supported
** directly, 3 or 4 drives must use external
** 4 drive support. SPP can be selected
** through the ECR register of ECP as mode 000.
** In this mode, EPP can be selected through
** the ECR register of ECP as mode 100.
**
** PP_FDC:
** 00 - Normal
** 01 - PPFD1
** 10 - PPFD2
** 11 - Reserved
**
** MIDI1:
** Serial Clock Select:
** A low level on this bit disables MIDI support,
** clock = divide by 13. A high level on this
** bit enables MIDI support, clock = divide by 12.
**
** MIDI operates at 31.25 Kbps which can be derived
** from 125 KHz (24 MHz / 12 = 2 MHz, 2 MHz / 16 = 125 KHz)
**
** ALT_IO:
** 0 - Use pins IRRX, IRTX
** 1 - Use pins IRRX2, IRTX2
**
** If this bit is set, the IR receive and transmit
** functions will not be available on pins 25 and 26
** unless CR00<IDE_EN> = 11.
*/
typedef union _SMC37c669_CR04 {
unsigned char as_uchar;
struct {
unsigned ppt_ext_mode : 2; /* See note above */
unsigned ppt_fdc : 2; /* See note above */
unsigned midi1 : 1; /* See note above */
unsigned midi2 : 1; /* See note above */
unsigned epp_type : 1; /* 0 = EPP 1.9, 1 = EPP 1.7 */
unsigned alt_io : 1; /* See note above */
} by_field;
} SMC37c669_CR04;
/*
** CR05 - default value 0x00
**
** DEN_SEL:
** 00 - Densel output normal
** 01 - Reserved
** 10 - Densel output 1
** 11 - Densel output 0
**
*/
typedef union _SMC37c669_CR05 {
unsigned char as_uchar;
struct {
unsigned reserved1 : 2; /* RAZ */
unsigned fdc_dma_mode : 1; /* 0 = burst, 1 = non-burst */
unsigned den_sel : 2; /* See note above */
unsigned swap_drv : 1; /* Swap the FDC motor selects */
unsigned extx4 : 1; /* 0 = 2 drive, 1 = external 4 drive decode */
unsigned reserved2 : 1; /* RAZ */
} by_field;
} SMC37c669_CR05;
/*
** CR06 - default value 0xFF
*/
typedef union _SMC37c669_CR06 {
unsigned char as_uchar;
struct {
unsigned floppy_a : 2; /* Type of floppy drive A */
unsigned floppy_b : 2; /* Type of floppy drive B */
unsigned floppy_c : 2; /* Type of floppy drive C */
unsigned floppy_d : 2; /* Type of floppy drive D */
} by_field;
} SMC37c669_CR06;
/*
** CR07 - default value 0x00
**
** Auto Power Management CR07<7:4>:
** 0 - Auto Powerdown disabled (default)
** 1 - Auto Powerdown enabled
**
** This bit is reset to the default state by POR or
** a hardware reset.
**
*/
typedef union _SMC37c669_CR07 {
unsigned char as_uchar;
struct {
unsigned floppy_boot : 2; /* 0 = A:, 1 = B: */
unsigned reserved1 : 2; /* RAZ */
unsigned ppt_en : 1; /* See note above */
unsigned uart1_en : 1; /* See note above */
unsigned uart2_en : 1; /* See note above */
unsigned fdc_en : 1; /* See note above */
} by_field;
} SMC37c669_CR07;
/*
** CR08 - default value 0x00
*/
typedef union _SMC37c669_CR08 {
unsigned char as_uchar;
struct {
unsigned zero : 4; /* 0 */
unsigned addrx7_4 : 4; /* ADR<7:3> for ADRx decode */
} by_field;
} SMC37c669_CR08;
/*
** CR09 - default value 0x00
**
** ADRx_CONFIG:
** 00 - ADRx disabled
** 01 - 1 byte decode A<3:0> = 0000b
** 10 - 8 byte block decode A<3:0> = 0XXXb
** 11 - 16 byte block decode A<3:0> = XXXXb
**
*/
typedef union _SMC37c669_CR09 {
unsigned char as_uchar;
struct {
unsigned adra8 : 3; /* ADR<10:8> for ADRx decode */
unsigned reserved1 : 3;
unsigned adrx_config : 2; /* See note above */
} by_field;
} SMC37c669_CR09;
/*
** CR0A - default value 0x00
*/
typedef union _SMC37c669_CR0A {
unsigned char as_uchar;
struct {
unsigned ecp_fifo_threshold : 4;
unsigned reserved1 : 4;
} by_field;
} SMC37c669_CR0A;
/*
** CR0B - default value 0x00
*/
typedef union _SMC37c669_CR0B {
unsigned char as_uchar;
struct {
unsigned fdd0_drtx : 2; /* FDD0 Data Rate Table */
unsigned fdd1_drtx : 2; /* FDD1 Data Rate Table */
unsigned fdd2_drtx : 2; /* FDD2 Data Rate Table */
unsigned fdd3_drtx : 2; /* FDD3 Data Rate Table */
} by_field;
} SMC37c669_CR0B;
/*
** CR0C - default value 0x00
**
** UART2_MODE:
** 000 - Standard (default)
** 001 - IrDA (HPSIR)
** 010 - Amplitude Shift Keyed IR @500 KHz
** 011 - Reserved
** 1xx - Reserved
**
*/
typedef union _SMC37c669_CR0C {
unsigned char as_uchar;
struct {
unsigned uart2_rcv_polarity : 1; /* 1 = invert RX */
unsigned uart2_xmit_polarity : 1; /* 1 = invert TX */
unsigned uart2_duplex : 1; /* 1 = full, 0 = half */
unsigned uart2_mode : 3; /* See note above */
unsigned uart1_speed : 1; /* 1 = high speed enabled */
unsigned uart2_speed : 1; /* 1 = high speed enabled */
} by_field;
} SMC37c669_CR0C;
/*
** CR0D - default value 0x03
**
** Device ID Register - read only
*/
typedef union _SMC37c669_CR0D {
unsigned char as_uchar;
struct {
unsigned device_id : 8; /* Returns 0x3 in this field */
} by_field;
} SMC37c669_CR0D;
/*
** CR0E - default value 0x02
**
** Device Revision Register - read only
*/
typedef union _SMC37c669_CR0E {
unsigned char as_uchar;
struct {
unsigned device_rev : 8; /* Returns 0x2 in this field */
} by_field;
} SMC37c669_CR0E;
/*
** CR0F - default value 0x00
*/
typedef union _SMC37c669_CR0F {
unsigned char as_uchar;
struct {
unsigned test0 : 1; /* Reserved - set to 0 */
unsigned test1 : 1; /* Reserved - set to 0 */
unsigned test2 : 1; /* Reserved - set to 0 */
unsigned test3 : 1; /* Reserved - set t0 0 */
unsigned test4 : 1; /* Reserved - set to 0 */
unsigned test5 : 1; /* Reserved - set t0 0 */
unsigned test6 : 1; /* Reserved - set t0 0 */
unsigned test7 : 1; /* Reserved - set to 0 */
} by_field;
} SMC37c669_CR0F;
/*
** CR10 - default value 0x00
*/
typedef union _SMC37c669_CR10 {
unsigned char as_uchar;
struct {
unsigned reserved1 : 3; /* RAZ */
unsigned pll_gain : 1; /* 1 = 3V, 2 = 5V operation */
unsigned pll_stop : 1; /* 1 = stop PLLs */
unsigned ace_stop : 1; /* 1 = stop UART clocks */
unsigned pll_clock_ctrl : 1; /* 0 = 14.318 MHz, 1 = 24 MHz */
unsigned ir_test : 1; /* Enable IR test mode */
} by_field;
} SMC37c669_CR10;
/*
** CR11 - default value 0x00
*/
typedef union _SMC37c669_CR11 {
unsigned char as_uchar;
struct {
unsigned ir_loopback : 1; /* Internal IR loop back */
unsigned test_10ms : 1; /* Test 10ms autopowerdown FDC timeout */
unsigned reserved1 : 6; /* RAZ */
} by_field;
} SMC37c669_CR11;
/*
** CR12 - CR1D are reserved registers
*/
/*
** CR1E - default value 0x80
**
** GAMECS:
** 00 - GAMECS disabled
** 01 - 1 byte decode ADR<3:0> = 0001b
** 10 - 8 byte block decode ADR<3:0> = 0XXXb
** 11 - 16 byte block decode ADR<3:0> = XXXXb
**
*/
typedef union _SMC37c66_CR1E {
unsigned char as_uchar;
struct {
unsigned gamecs_config: 2; /* See note above */
unsigned gamecs_addr9_4 : 6; /* GAMECS Addr<9:4> */
} by_field;
} SMC37c669_CR1E;
/*
** CR1F - default value 0x00
**
** DT0 DT1 DRVDEN0 DRVDEN1 Drive Type
** --- --- ------- ------- ----------
** 0 0 DENSEL DRATE0 4/2/1 MB 3.5"
** 2/1 MB 5.25"
** 2/1.6/1 MB 3.5" (3-mode)
** 0 1 DRATE1 DRATE0
** 1 0 nDENSEL DRATE0 PS/2
** 1 1 DRATE0 DRATE1
**
** Note: DENSEL, DRATE1, and DRATE0 map onto two output
** pins - DRVDEN0 and DRVDEN1.
**
*/
typedef union _SMC37c669_CR1F {
unsigned char as_uchar;
struct {
unsigned fdd0_drive_type : 2; /* FDD0 drive type */
unsigned fdd1_drive_type : 2; /* FDD1 drive type */
unsigned fdd2_drive_type : 2; /* FDD2 drive type */
unsigned fdd3_drive_type : 2; /* FDD3 drive type */
} by_field;
} SMC37c669_CR1F;
/*
** CR20 - default value 0x3C
**
** FDC Base Address Register
** - To disable this decode set Addr<9:8> = 0
** - A<10> = 0, A<3:0> = 0XXXb to access.
**
*/
typedef union _SMC37c669_CR20 {
unsigned char as_uchar;
struct {
unsigned zero : 2; /* 0 */
unsigned addr9_4 : 6; /* FDC Addr<9:4> */
} by_field;
} SMC37c669_CR20;
/*
** CR21 - default value 0x3C
**
** IDE Base Address Register
** - To disable this decode set Addr<9:8> = 0
** - A<10> = 0, A<3:0> = 0XXXb to access.
**
*/
typedef union _SMC37c669_CR21 {
unsigned char as_uchar;
struct {
unsigned zero : 2; /* 0 */
unsigned addr9_4 : 6; /* IDE Addr<9:4> */
} by_field;
} SMC37c669_CR21;
/*
** CR22 - default value 0x3D
**
** IDE Alternate Status Base Address Register
** - To disable this decode set Addr<9:8> = 0
** - A<10> = 0, A<3:0> = 0110b to access.
**
*/
typedef union _SMC37c669_CR22 {
unsigned char as_uchar;
struct {
unsigned zero : 2; /* 0 */
unsigned addr9_4 : 6; /* IDE Alt Status Addr<9:4> */
} by_field;
} SMC37c669_CR22;
/*
** CR23 - default value 0x00
**
** Parallel Port Base Address Register
** - To disable this decode set Addr<9:8> = 0
** - A<10> = 0 to access.
** - If EPP is enabled, A<2:0> = XXXb to access.
** If EPP is NOT enabled, A<1:0> = XXb to access
**
*/
typedef union _SMC37c669_CR23 {
unsigned char as_uchar;
struct {
unsigned addr9_2 : 8; /* Parallel Port Addr<9:2> */
} by_field;
} SMC37c669_CR23;
/*
** CR24 - default value 0x00
**
** UART1 Base Address Register
** - To disable this decode set Addr<9:8> = 0
** - A<10> = 0, A<2:0> = XXXb to access.
**
*/
typedef union _SMC37c669_CR24 {
unsigned char as_uchar;
struct {
unsigned zero : 1; /* 0 */
unsigned addr9_3 : 7; /* UART1 Addr<9:3> */
} by_field;
} SMC37c669_CR24;
/*
** CR25 - default value 0x00
**
** UART2 Base Address Register
** - To disable this decode set Addr<9:8> = 0
** - A<10> = 0, A<2:0> = XXXb to access.
**
*/
typedef union _SMC37c669_CR25 {
unsigned char as_uchar;
struct {
unsigned zero : 1; /* 0 */
unsigned addr9_3 : 7; /* UART2 Addr<9:3> */
} by_field;
} SMC37c669_CR25;
/*
** CR26 - default value 0x00
**
** Parallel Port / FDC DMA Select Register
**
** D3 - D0 DMA
** D7 - D4 Selected
** ------- --------
** 0000 None
** 0001 DMA_A
** 0010 DMA_B
** 0011 DMA_C
**
*/
typedef union _SMC37c669_CR26 {
unsigned char as_uchar;
struct {
unsigned ppt_drq : 4; /* See note above */
unsigned fdc_drq : 4; /* See note above */
} by_field;
} SMC37c669_CR26;
/*
** CR27 - default value 0x00
**
** Parallel Port / FDC IRQ Select Register
**
** D3 - D0 IRQ
** D7 - D4 Selected
** ------- --------
** 0000 None
** 0001 IRQ_A
** 0010 IRQ_B
** 0011 IRQ_C
** 0100 IRQ_D
** 0101 IRQ_E
** 0110 IRQ_F
** 0111 Reserved
** 1000 IRQ_H
**
** Any unselected IRQ REQ is in tristate
**
*/
typedef union _SMC37c669_CR27 {
unsigned char as_uchar;
struct {
unsigned ppt_irq : 4; /* See note above */
unsigned fdc_irq : 4; /* See note above */
} by_field;
} SMC37c669_CR27;
/*
** CR28 - default value 0x00
**
** UART IRQ Select Register
**
** D3 - D0 IRQ
** D7 - D4 Selected
** ------- --------
** 0000 None
** 0001 IRQ_A
** 0010 IRQ_B
** 0011 IRQ_C
** 0100 IRQ_D
** 0101 IRQ_E
** 0110 IRQ_F
** 0111 Reserved
** 1000 IRQ_H
** 1111 share with UART1 (only for UART2)
**
** Any unselected IRQ REQ is in tristate
**
** To share an IRQ between UART1 and UART2, set
** UART1 to use the desired IRQ and set UART2 to
** 0xF to enable sharing mechanism.
**
*/
typedef union _SMC37c669_CR28 {
unsigned char as_uchar;
struct {
unsigned uart2_irq : 4; /* See note above */
unsigned uart1_irq : 4; /* See note above */
} by_field;
} SMC37c669_CR28;
/*
** CR29 - default value 0x00
**
** IRQIN IRQ Select Register
**
** D3 - D0 IRQ
** D7 - D4 Selected
** ------- --------
** 0000 None
** 0001 IRQ_A
** 0010 IRQ_B
** 0011 IRQ_C
** 0100 IRQ_D
** 0101 IRQ_E
** 0110 IRQ_F
** 0111 Reserved
** 1000 IRQ_H
**
** Any unselected IRQ REQ is in tristate
**
*/
typedef union _SMC37c669_CR29 {
unsigned char as_uchar;
struct {
unsigned irqin_irq : 4; /* See note above */
unsigned reserved1 : 4; /* RAZ */
} by_field;
} SMC37c669_CR29;
/*
** Aliases of Configuration Register formats (should match
** the set of index aliases).
**
** Note that CR24 and CR25 have the same format and are the
** base address registers for UART1 and UART2. Because of
** this we only define 1 alias here - for CR24 - as the serial
** base address register.
**
** Note that CR21 and CR22 have the same format and are the
** base address and alternate status address registers for
** the IDE controller. Because of this we only define 1 alias
** here - for CR21 - as the IDE address register.
**
*/
typedef SMC37c669_CR0D SMC37c669_DEVICE_ID_REGISTER;
typedef SMC37c669_CR0E SMC37c669_DEVICE_REVISION_REGISTER;
typedef SMC37c669_CR20 SMC37c669_FDC_BASE_ADDRESS_REGISTER;
typedef SMC37c669_CR21 SMC37c669_IDE_ADDRESS_REGISTER;
typedef SMC37c669_CR23 SMC37c669_PARALLEL_BASE_ADDRESS_REGISTER;
typedef SMC37c669_CR24 SMC37c669_SERIAL_BASE_ADDRESS_REGISTER;
typedef SMC37c669_CR26 SMC37c669_PARALLEL_FDC_DRQ_REGISTER;
typedef SMC37c669_CR27 SMC37c669_PARALLEL_FDC_IRQ_REGISTER;
typedef SMC37c669_CR28 SMC37c669_SERIAL_IRQ_REGISTER;
/*
** ISA/Device IRQ Translation Table Entry Definition
*/
typedef struct _SMC37c669_IRQ_TRANSLATION_ENTRY {
int device_irq;
int isa_irq;
} SMC37c669_IRQ_TRANSLATION_ENTRY;
/*
** ISA/Device DMA Translation Table Entry Definition
*/
typedef struct _SMC37c669_DRQ_TRANSLATION_ENTRY {
int device_drq;
int isa_drq;
} SMC37c669_DRQ_TRANSLATION_ENTRY;
/*
** External Interface Function Prototype Declarations
*/
SMC37c669_CONFIG_REGS *SMC37c669_detect(
int
);
unsigned int SMC37c669_enable_device(
unsigned int func
);
unsigned int SMC37c669_disable_device(
unsigned int func
);
unsigned int SMC37c669_configure_device(
unsigned int func,
int port,
int irq,
int drq
);
void SMC37c669_display_device_info(
void
);
#endif /* __SMC37c669_H */
/* file: smcc669.c
*
* Copyright (C) 1997 by
* Digital Equipment Corporation, Maynard, Massachusetts.
* All rights reserved.
*
* This software is furnished under a license and may be used and copied
* only in accordance of the terms of such license and with the
* inclusion of the above copyright notice. This software or any other
* copies thereof may not be provided or otherwise made available to any
* other person. No title to and ownership of the software is hereby
* transferred.
*
* The information in this software is subject to change without notice
* and should not be construed as a commitment by digital equipment
* corporation.
*
* Digital assumes no responsibility for the use or reliability of its
* software on equipment which is not supplied by digital.
*/
/*
*++
* FACILITY:
*
* Alpha SRM Console Firmware
*
* MODULE DESCRIPTION:
*
* SMC37c669 Super I/O controller configuration routines.
*
* AUTHORS:
*
* Eric Rasmussen
*
* CREATION DATE:
*
* 28-Jan-1997
*
* MODIFICATION HISTORY:
*
* er 01-May-1997 Fixed pointer conversion errors in
* SMC37c669_get_device_config().
* er 28-Jan-1997 Initial version.
*
*--
*/
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define wb( _x_, _y_ ) outb( _y_, (unsigned int)((unsigned long)_x_) )
#define rb( _x_ ) inb( (unsigned int)((unsigned long)_x_) )
/*
** Local storage for device configuration information.
**
** Since the SMC37c669 does not provide an explicit
** mechanism for enabling/disabling individual device
** functions, other than unmapping the device, local
** storage for device configuration information is
** allocated here for use in implementing our own
** function enable/disable scheme.
*/
static struct DEVICE_CONFIG {
unsigned int port1;
unsigned int port2;
int irq;
int drq;
} local_config [NUM_FUNCS];
/*
** List of all possible addresses for the Super I/O chip
*/
static unsigned long SMC37c669_Addresses[] __initdata =
{
0x3F0UL, /* Primary address */
0x370UL, /* Secondary address */
0UL /* End of list */
};
/*
** Global Pointer to the Super I/O device
*/
static SMC37c669_CONFIG_REGS *SMC37c669 __initdata = NULL;
/*
** IRQ Translation Table
**
** The IRQ translation table is a list of SMC37c669 device
** and standard ISA IRQs.
**
*/
static SMC37c669_IRQ_TRANSLATION_ENTRY *SMC37c669_irq_table __initdata;
/*
** The following definition is for the default IRQ
** translation table.
*/
static SMC37c669_IRQ_TRANSLATION_ENTRY SMC37c669_default_irq_table[]
__initdata =
{
{ SMC37c669_DEVICE_IRQ_A, -1 },
{ SMC37c669_DEVICE_IRQ_B, -1 },
{ SMC37c669_DEVICE_IRQ_C, 7 },
{ SMC37c669_DEVICE_IRQ_D, 6 },
{ SMC37c669_DEVICE_IRQ_E, 4 },
{ SMC37c669_DEVICE_IRQ_F, 3 },
{ SMC37c669_DEVICE_IRQ_H, -1 },
{ -1, -1 } /* End of table */
};
/*
** The following definition is for the MONET (XP1000) IRQ
** translation table.
*/
static SMC37c669_IRQ_TRANSLATION_ENTRY SMC37c669_monet_irq_table[]
__initdata =
{
{ SMC37c669_DEVICE_IRQ_A, -1 },
{ SMC37c669_DEVICE_IRQ_B, -1 },
{ SMC37c669_DEVICE_IRQ_C, 6 },
{ SMC37c669_DEVICE_IRQ_D, 7 },
{ SMC37c669_DEVICE_IRQ_E, 4 },
{ SMC37c669_DEVICE_IRQ_F, 3 },
{ SMC37c669_DEVICE_IRQ_H, -1 },
{ -1, -1 } /* End of table */
};
static SMC37c669_IRQ_TRANSLATION_ENTRY *SMC37c669_irq_tables[] __initdata =
{
SMC37c669_default_irq_table,
SMC37c669_monet_irq_table
};
/*
** DRQ Translation Table
**
** The DRQ translation table is a list of SMC37c669 device and
** ISA DMA channels.
**
*/
static SMC37c669_DRQ_TRANSLATION_ENTRY *SMC37c669_drq_table __initdata;
/*
** The following definition is the default DRQ
** translation table.
*/
static SMC37c669_DRQ_TRANSLATION_ENTRY SMC37c669_default_drq_table[]
__initdata =
{
{ SMC37c669_DEVICE_DRQ_A, 2 },
{ SMC37c669_DEVICE_DRQ_B, 3 },
{ SMC37c669_DEVICE_DRQ_C, -1 },
{ -1, -1 } /* End of table */
};
/*
** Local Function Prototype Declarations
*/
static unsigned int SMC37c669_is_device_enabled(
unsigned int func
);
#if 0
static unsigned int SMC37c669_get_device_config(
unsigned int func,
int *port,
int *irq,
int *drq
);
#endif
static void SMC37c669_config_mode(
unsigned int enable
);
static unsigned char SMC37c669_read_config(
unsigned char index
);
static void SMC37c669_write_config(
unsigned char index,
unsigned char data
);
static void SMC37c669_init_local_config( void );
static struct DEVICE_CONFIG *SMC37c669_get_config(
unsigned int func
);
static int SMC37c669_xlate_irq(
int irq
);
static int SMC37c669_xlate_drq(
int drq
);
static __cacheline_aligned DEFINE_SPINLOCK(smc_lock);
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function detects the presence of an SMC37c669 Super I/O
** controller.
**
** FORMAL PARAMETERS:
**
** None
**
** RETURN VALUE:
**
** Returns a pointer to the device if found, otherwise,
** the NULL pointer is returned.
**
** SIDE EFFECTS:
**
** None
**
**--
*/
SMC37c669_CONFIG_REGS * __init SMC37c669_detect( int index )
{
int i;
SMC37c669_DEVICE_ID_REGISTER id;
for ( i = 0; SMC37c669_Addresses[i] != 0; i++ ) {
/*
** Initialize the device pointer even though we don't yet know if
** the controller is at this address. The support functions access
** the controller through this device pointer so we need to set it
** even when we are looking ...
*/
SMC37c669 = ( SMC37c669_CONFIG_REGS * )SMC37c669_Addresses[i];
/*
** Enter configuration mode
*/
SMC37c669_config_mode( TRUE );
/*
** Read the device id
*/
id.as_uchar = SMC37c669_read_config( SMC37c669_DEVICE_ID_INDEX );
/*
** Exit configuration mode
*/
SMC37c669_config_mode( FALSE );
/*
** Does the device id match? If so, assume we have found an
** SMC37c669 controller at this address.
*/
if ( id.by_field.device_id == SMC37c669_DEVICE_ID ) {
/*
** Initialize the IRQ and DRQ translation tables.
*/
SMC37c669_irq_table = SMC37c669_irq_tables[ index ];
SMC37c669_drq_table = SMC37c669_default_drq_table;
/*
** erfix
**
** If the platform can't use the IRQ and DRQ defaults set up in this
** file, it should call a platform-specific external routine at this
** point to reset the IRQ and DRQ translation table pointers to point
** at the appropriate tables for the platform. If the defaults are
** acceptable, then the external routine should do nothing.
*/
/*
** Put the chip back into configuration mode
*/
SMC37c669_config_mode( TRUE );
/*
** Initialize local storage for configuration information
*/
SMC37c669_init_local_config( );
/*
** Exit configuration mode
*/
SMC37c669_config_mode( FALSE );
/*
** SMC37c669 controller found, break out of search loop
*/
break;
}
else {
/*
** Otherwise, we did not find an SMC37c669 controller at this
** address so set the device pointer to NULL.
*/
SMC37c669 = NULL;
}
}
return SMC37c669;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function enables an SMC37c669 device function.
**
** FORMAL PARAMETERS:
**
** func:
** Which device function to enable
**
** RETURN VALUE:
**
** Returns TRUE is the device function was enabled, otherwise, FALSE
**
** SIDE EFFECTS:
**
** {@description or none@}
**
** DESIGN:
**
** Enabling a device function in the SMC37c669 controller involves
** setting all of its mappings (port, irq, drq ...). A local
** "shadow" copy of the device configuration is kept so we can
** just set each mapping to what the local copy says.
**
** This function ALWAYS updates the local shadow configuration of
** the device function being enabled, even if the device is always
** enabled. To avoid replication of code, functions such as
** configure_device set up the local copy and then call this
** function to the update the real device.
**
**--
*/
unsigned int __init SMC37c669_enable_device ( unsigned int func )
{
unsigned int ret_val = FALSE;
/*
** Put the device into configuration mode
*/
SMC37c669_config_mode( TRUE );
switch ( func ) {
case SERIAL_0:
{
SMC37c669_SERIAL_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_SERIAL_IRQ_REGISTER irq;
/*
** Enable the serial 1 IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL_IRQ_INDEX );
irq.by_field.uart1_irq =
SMC37c669_RAW_DEVICE_IRQ(
SMC37c669_xlate_irq( local_config[ func ].irq )
);
SMC37c669_write_config( SMC37c669_SERIAL_IRQ_INDEX, irq.as_uchar );
/*
** Enable the serial 1 port base address mapping
*/
base_addr.as_uchar = 0;
base_addr.by_field.addr9_3 = local_config[ func ].port1 >> 3;
SMC37c669_write_config(
SMC37c669_SERIAL0_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case SERIAL_1:
{
SMC37c669_SERIAL_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_SERIAL_IRQ_REGISTER irq;
/*
** Enable the serial 2 IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL_IRQ_INDEX );
irq.by_field.uart2_irq =
SMC37c669_RAW_DEVICE_IRQ(
SMC37c669_xlate_irq( local_config[ func ].irq )
);
SMC37c669_write_config( SMC37c669_SERIAL_IRQ_INDEX, irq.as_uchar );
/*
** Enable the serial 2 port base address mapping
*/
base_addr.as_uchar = 0;
base_addr.by_field.addr9_3 = local_config[ func ].port1 >> 3;
SMC37c669_write_config(
SMC37c669_SERIAL1_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case PARALLEL_0:
{
SMC37c669_PARALLEL_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_PARALLEL_FDC_IRQ_REGISTER irq;
SMC37c669_PARALLEL_FDC_DRQ_REGISTER drq;
/*
** Enable the parallel port DMA channel mapping
*/
drq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_DRQ_INDEX );
drq.by_field.ppt_drq =
SMC37c669_RAW_DEVICE_DRQ(
SMC37c669_xlate_drq( local_config[ func ].drq )
);
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_DRQ_INDEX,
drq.as_uchar
);
/*
** Enable the parallel port IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_IRQ_INDEX );
irq.by_field.ppt_irq =
SMC37c669_RAW_DEVICE_IRQ(
SMC37c669_xlate_irq( local_config[ func ].irq )
);
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_IRQ_INDEX,
irq.as_uchar
);
/*
** Enable the parallel port base address mapping
*/
base_addr.as_uchar = 0;
base_addr.by_field.addr9_2 = local_config[ func ].port1 >> 2;
SMC37c669_write_config(
SMC37c669_PARALLEL0_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case FLOPPY_0:
{
SMC37c669_FDC_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_PARALLEL_FDC_IRQ_REGISTER irq;
SMC37c669_PARALLEL_FDC_DRQ_REGISTER drq;
/*
** Enable the floppy controller DMA channel mapping
*/
drq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_DRQ_INDEX );
drq.by_field.fdc_drq =
SMC37c669_RAW_DEVICE_DRQ(
SMC37c669_xlate_drq( local_config[ func ].drq )
);
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_DRQ_INDEX,
drq.as_uchar
);
/*
** Enable the floppy controller IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_IRQ_INDEX );
irq.by_field.fdc_irq =
SMC37c669_RAW_DEVICE_IRQ(
SMC37c669_xlate_irq( local_config[ func ].irq )
);
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_IRQ_INDEX,
irq.as_uchar
);
/*
** Enable the floppy controller base address mapping
*/
base_addr.as_uchar = 0;
base_addr.by_field.addr9_4 = local_config[ func ].port1 >> 4;
SMC37c669_write_config(
SMC37c669_FDC_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case IDE_0:
{
SMC37c669_IDE_ADDRESS_REGISTER ide_addr;
/*
** Enable the IDE alternate status base address mapping
*/
ide_addr.as_uchar = 0;
ide_addr.by_field.addr9_4 = local_config[ func ].port2 >> 4;
SMC37c669_write_config(
SMC37c669_IDE_ALTERNATE_ADDRESS_INDEX,
ide_addr.as_uchar
);
/*
** Enable the IDE controller base address mapping
*/
ide_addr.as_uchar = 0;
ide_addr.by_field.addr9_4 = local_config[ func ].port1 >> 4;
SMC37c669_write_config(
SMC37c669_IDE_BASE_ADDRESS_INDEX,
ide_addr.as_uchar
);
ret_val = TRUE;
break;
}
}
/*
** Exit configuration mode and return
*/
SMC37c669_config_mode( FALSE );
return ret_val;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function disables a device function within the
** SMC37c669 Super I/O controller.
**
** FORMAL PARAMETERS:
**
** func:
** Which function to disable
**
** RETURN VALUE:
**
** Return TRUE if the device function was disabled, otherwise, FALSE
**
** SIDE EFFECTS:
**
** {@description or none@}
**
** DESIGN:
**
** Disabling a function in the SMC37c669 device involves
** disabling all the function's mappings (port, irq, drq ...).
** A shadow copy of the device configuration is maintained
** in local storage so we won't worry aboving saving the
** current configuration information.
**
**--
*/
unsigned int __init SMC37c669_disable_device ( unsigned int func )
{
unsigned int ret_val = FALSE;
/*
** Put the device into configuration mode
*/
SMC37c669_config_mode( TRUE );
switch ( func ) {
case SERIAL_0:
{
SMC37c669_SERIAL_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_SERIAL_IRQ_REGISTER irq;
/*
** Disable the serial 1 IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL_IRQ_INDEX );
irq.by_field.uart1_irq = 0;
SMC37c669_write_config( SMC37c669_SERIAL_IRQ_INDEX, irq.as_uchar );
/*
** Disable the serial 1 port base address mapping
*/
base_addr.as_uchar = 0;
SMC37c669_write_config(
SMC37c669_SERIAL0_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case SERIAL_1:
{
SMC37c669_SERIAL_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_SERIAL_IRQ_REGISTER irq;
/*
** Disable the serial 2 IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL_IRQ_INDEX );
irq.by_field.uart2_irq = 0;
SMC37c669_write_config( SMC37c669_SERIAL_IRQ_INDEX, irq.as_uchar );
/*
** Disable the serial 2 port base address mapping
*/
base_addr.as_uchar = 0;
SMC37c669_write_config(
SMC37c669_SERIAL1_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case PARALLEL_0:
{
SMC37c669_PARALLEL_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_PARALLEL_FDC_IRQ_REGISTER irq;
SMC37c669_PARALLEL_FDC_DRQ_REGISTER drq;
/*
** Disable the parallel port DMA channel mapping
*/
drq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_DRQ_INDEX );
drq.by_field.ppt_drq = 0;
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_DRQ_INDEX,
drq.as_uchar
);
/*
** Disable the parallel port IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_IRQ_INDEX );
irq.by_field.ppt_irq = 0;
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_IRQ_INDEX,
irq.as_uchar
);
/*
** Disable the parallel port base address mapping
*/
base_addr.as_uchar = 0;
SMC37c669_write_config(
SMC37c669_PARALLEL0_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case FLOPPY_0:
{
SMC37c669_FDC_BASE_ADDRESS_REGISTER base_addr;
SMC37c669_PARALLEL_FDC_IRQ_REGISTER irq;
SMC37c669_PARALLEL_FDC_DRQ_REGISTER drq;
/*
** Disable the floppy controller DMA channel mapping
*/
drq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_DRQ_INDEX );
drq.by_field.fdc_drq = 0;
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_DRQ_INDEX,
drq.as_uchar
);
/*
** Disable the floppy controller IRQ mapping
*/
irq.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_IRQ_INDEX );
irq.by_field.fdc_irq = 0;
SMC37c669_write_config(
SMC37c669_PARALLEL_FDC_IRQ_INDEX,
irq.as_uchar
);
/*
** Disable the floppy controller base address mapping
*/
base_addr.as_uchar = 0;
SMC37c669_write_config(
SMC37c669_FDC_BASE_ADDRESS_INDEX,
base_addr.as_uchar
);
ret_val = TRUE;
break;
}
case IDE_0:
{
SMC37c669_IDE_ADDRESS_REGISTER ide_addr;
/*
** Disable the IDE alternate status base address mapping
*/
ide_addr.as_uchar = 0;
SMC37c669_write_config(
SMC37c669_IDE_ALTERNATE_ADDRESS_INDEX,
ide_addr.as_uchar
);
/*
** Disable the IDE controller base address mapping
*/
ide_addr.as_uchar = 0;
SMC37c669_write_config(
SMC37c669_IDE_BASE_ADDRESS_INDEX,
ide_addr.as_uchar
);
ret_val = TRUE;
break;
}
}
/*
** Exit configuration mode and return
*/
SMC37c669_config_mode( FALSE );
return ret_val;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function configures a device function within the
** SMC37c669 Super I/O controller.
**
** FORMAL PARAMETERS:
**
** func:
** Which device function
**
** port:
** I/O port for the function to use
**
** irq:
** IRQ for the device function to use
**
** drq:
** DMA channel for the device function to use
**
** RETURN VALUE:
**
** Returns TRUE if the device function was configured,
** otherwise, FALSE.
**
** SIDE EFFECTS:
**
** {@description or none@}
**
** DESIGN:
**
** If this function returns TRUE, the local shadow copy of
** the configuration is also updated. If the device function
** is currently disabled, only the local shadow copy is
** updated and the actual device function will be updated
** if/when it is enabled.
**
**--
*/
unsigned int __init SMC37c669_configure_device (
unsigned int func,
int port,
int irq,
int drq )
{
struct DEVICE_CONFIG *cp;
/*
** Check for a valid configuration
*/
if ( ( cp = SMC37c669_get_config ( func ) ) != NULL ) {
/*
** Configuration is valid, update the local shadow copy
*/
if ( ( drq & ~0xFF ) == 0 ) {
cp->drq = drq;
}
if ( ( irq & ~0xFF ) == 0 ) {
cp->irq = irq;
}
if ( ( port & ~0xFFFF ) == 0 ) {
cp->port1 = port;
}
/*
** If the device function is enabled, update the actual
** device configuration.
*/
if ( SMC37c669_is_device_enabled( func ) ) {
SMC37c669_enable_device( func );
}
return TRUE;
}
return FALSE;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function determines whether a device function
** within the SMC37c669 controller is enabled.
**
** FORMAL PARAMETERS:
**
** func:
** Which device function
**
** RETURN VALUE:
**
** Returns TRUE if the device function is enabled, otherwise, FALSE
**
** SIDE EFFECTS:
**
** {@description or none@}
**
** DESIGN:
**
** To check whether a device is enabled we will only look at
** the port base address mapping. According to the SMC37c669
** specification, all of the port base address mappings are
** disabled if the addr<9:8> (bits <7:6> of the register) are
** zero.
**
**--
*/
static unsigned int __init SMC37c669_is_device_enabled ( unsigned int func )
{
unsigned char base_addr = 0;
unsigned int dev_ok = FALSE;
unsigned int ret_val = FALSE;
/*
** Enter configuration mode
*/
SMC37c669_config_mode( TRUE );
switch ( func ) {
case SERIAL_0:
base_addr =
SMC37c669_read_config( SMC37c669_SERIAL0_BASE_ADDRESS_INDEX );
dev_ok = TRUE;
break;
case SERIAL_1:
base_addr =
SMC37c669_read_config( SMC37c669_SERIAL1_BASE_ADDRESS_INDEX );
dev_ok = TRUE;
break;
case PARALLEL_0:
base_addr =
SMC37c669_read_config( SMC37c669_PARALLEL0_BASE_ADDRESS_INDEX );
dev_ok = TRUE;
break;
case FLOPPY_0:
base_addr =
SMC37c669_read_config( SMC37c669_FDC_BASE_ADDRESS_INDEX );
dev_ok = TRUE;
break;
case IDE_0:
base_addr =
SMC37c669_read_config( SMC37c669_IDE_BASE_ADDRESS_INDEX );
dev_ok = TRUE;
break;
}
/*
** If we have a valid device, check base_addr<7:6> to see if the
** device is enabled (mapped).
*/
if ( ( dev_ok ) && ( ( base_addr & 0xC0 ) != 0 ) ) {
/*
** The mapping is not disabled, so assume that the function is
** enabled.
*/
ret_val = TRUE;
}
/*
** Exit configuration mode
*/
SMC37c669_config_mode( FALSE );
return ret_val;
}
#if 0
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function retrieves the configuration information of a
** device function within the SMC37c699 Super I/O controller.
**
** FORMAL PARAMETERS:
**
** func:
** Which device function
**
** port:
** I/O port returned
**
** irq:
** IRQ returned
**
** drq:
** DMA channel returned
**
** RETURN VALUE:
**
** Returns TRUE if the device configuration was successfully
** retrieved, otherwise, FALSE.
**
** SIDE EFFECTS:
**
** The data pointed to by the port, irq, and drq parameters
** my be modified even if the configuration is not successfully
** retrieved.
**
** DESIGN:
**
** The device configuration is fetched from the local shadow
** copy. Any unused parameters will be set to -1. Any
** parameter which is not desired can specify the NULL
** pointer.
**
**--
*/
static unsigned int __init SMC37c669_get_device_config (
unsigned int func,
int *port,
int *irq,
int *drq )
{
struct DEVICE_CONFIG *cp;
unsigned int ret_val = FALSE;
/*
** Check for a valid device configuration
*/
if ( ( cp = SMC37c669_get_config( func ) ) != NULL ) {
if ( drq != NULL ) {
*drq = cp->drq;
ret_val = TRUE;
}
if ( irq != NULL ) {
*irq = cp->irq;
ret_val = TRUE;
}
if ( port != NULL ) {
*port = cp->port1;
ret_val = TRUE;
}
}
return ret_val;
}
#endif
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function displays the current state of the SMC37c699
** Super I/O controller's device functions.
**
** FORMAL PARAMETERS:
**
** None
**
** RETURN VALUE:
**
** None
**
** SIDE EFFECTS:
**
** None
**
**--
*/
void __init SMC37c669_display_device_info ( void )
{
if ( SMC37c669_is_device_enabled( SERIAL_0 ) ) {
printk( " Serial 0: Enabled [ Port 0x%x, IRQ %d ]\n",
local_config[ SERIAL_0 ].port1,
local_config[ SERIAL_0 ].irq
);
}
else {
printk( " Serial 0: Disabled\n" );
}
if ( SMC37c669_is_device_enabled( SERIAL_1 ) ) {
printk( " Serial 1: Enabled [ Port 0x%x, IRQ %d ]\n",
local_config[ SERIAL_1 ].port1,
local_config[ SERIAL_1 ].irq
);
}
else {
printk( " Serial 1: Disabled\n" );
}
if ( SMC37c669_is_device_enabled( PARALLEL_0 ) ) {
printk( " Parallel: Enabled [ Port 0x%x, IRQ %d/%d ]\n",
local_config[ PARALLEL_0 ].port1,
local_config[ PARALLEL_0 ].irq,
local_config[ PARALLEL_0 ].drq
);
}
else {
printk( " Parallel: Disabled\n" );
}
if ( SMC37c669_is_device_enabled( FLOPPY_0 ) ) {
printk( " Floppy Ctrl: Enabled [ Port 0x%x, IRQ %d/%d ]\n",
local_config[ FLOPPY_0 ].port1,
local_config[ FLOPPY_0 ].irq,
local_config[ FLOPPY_0 ].drq
);
}
else {
printk( " Floppy Ctrl: Disabled\n" );
}
if ( SMC37c669_is_device_enabled( IDE_0 ) ) {
printk( " IDE 0: Enabled [ Port 0x%x, IRQ %d ]\n",
local_config[ IDE_0 ].port1,
local_config[ IDE_0 ].irq
);
}
else {
printk( " IDE 0: Disabled\n" );
}
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function puts the SMC37c669 Super I/O controller into,
** and takes it out of, configuration mode.
**
** FORMAL PARAMETERS:
**
** enable:
** TRUE to enter configuration mode, FALSE to exit.
**
** RETURN VALUE:
**
** None
**
** SIDE EFFECTS:
**
** The SMC37c669 controller may be left in configuration mode.
**
**--
*/
static void __init SMC37c669_config_mode(
unsigned int enable )
{
if ( enable ) {
/*
** To enter configuration mode, two writes in succession to the index
** port are required. If a write to another address or port occurs
** between these two writes, the chip does not enter configuration
** mode. Therefore, a spinlock is placed around the two writes to
** guarantee that they complete uninterrupted.
*/
spin_lock(&smc_lock);
wb( &SMC37c669->index_port, SMC37c669_CONFIG_ON_KEY );
wb( &SMC37c669->index_port, SMC37c669_CONFIG_ON_KEY );
spin_unlock(&smc_lock);
}
else {
wb( &SMC37c669->index_port, SMC37c669_CONFIG_OFF_KEY );
}
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function reads an SMC37c669 Super I/O controller
** configuration register. This function assumes that the
** device is already in configuration mode.
**
** FORMAL PARAMETERS:
**
** index:
** Index value of configuration register to read
**
** RETURN VALUE:
**
** Data read from configuration register
**
** SIDE EFFECTS:
**
** None
**
**--
*/
static unsigned char __init SMC37c669_read_config(
unsigned char index )
{
wb(&SMC37c669->index_port, index);
return rb(&SMC37c669->data_port);
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function writes an SMC37c669 Super I/O controller
** configuration register. This function assumes that the
** device is already in configuration mode.
**
** FORMAL PARAMETERS:
**
** index:
** Index of configuration register to write
**
** data:
** Data to be written
**
** RETURN VALUE:
**
** None
**
** SIDE EFFECTS:
**
** None
**
**--
*/
static void __init SMC37c669_write_config(
unsigned char index,
unsigned char data )
{
wb( &SMC37c669->index_port, index );
wb( &SMC37c669->data_port, data );
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function initializes the local device
** configuration storage. This function assumes
** that the device is already in configuration
** mode.
**
** FORMAL PARAMETERS:
**
** None
**
** RETURN VALUE:
**
** None
**
** SIDE EFFECTS:
**
** Local storage for device configuration information
** is initialized.
**
**--
*/
static void __init SMC37c669_init_local_config ( void )
{
SMC37c669_SERIAL_BASE_ADDRESS_REGISTER uart_base;
SMC37c669_SERIAL_IRQ_REGISTER uart_irqs;
SMC37c669_PARALLEL_BASE_ADDRESS_REGISTER ppt_base;
SMC37c669_PARALLEL_FDC_IRQ_REGISTER ppt_fdc_irqs;
SMC37c669_PARALLEL_FDC_DRQ_REGISTER ppt_fdc_drqs;
SMC37c669_FDC_BASE_ADDRESS_REGISTER fdc_base;
SMC37c669_IDE_ADDRESS_REGISTER ide_base;
SMC37c669_IDE_ADDRESS_REGISTER ide_alt;
/*
** Get serial port 1 base address
*/
uart_base.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL0_BASE_ADDRESS_INDEX );
/*
** Get IRQs for serial ports 1 & 2
*/
uart_irqs.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL_IRQ_INDEX );
/*
** Store local configuration information for serial port 1
*/
local_config[SERIAL_0].port1 = uart_base.by_field.addr9_3 << 3;
local_config[SERIAL_0].irq =
SMC37c669_xlate_irq(
SMC37c669_DEVICE_IRQ( uart_irqs.by_field.uart1_irq )
);
/*
** Get serial port 2 base address
*/
uart_base.as_uchar =
SMC37c669_read_config( SMC37c669_SERIAL1_BASE_ADDRESS_INDEX );
/*
** Store local configuration information for serial port 2
*/
local_config[SERIAL_1].port1 = uart_base.by_field.addr9_3 << 3;
local_config[SERIAL_1].irq =
SMC37c669_xlate_irq(
SMC37c669_DEVICE_IRQ( uart_irqs.by_field.uart2_irq )
);
/*
** Get parallel port base address
*/
ppt_base.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL0_BASE_ADDRESS_INDEX );
/*
** Get IRQs for parallel port and floppy controller
*/
ppt_fdc_irqs.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_IRQ_INDEX );
/*
** Get DRQs for parallel port and floppy controller
*/
ppt_fdc_drqs.as_uchar =
SMC37c669_read_config( SMC37c669_PARALLEL_FDC_DRQ_INDEX );
/*
** Store local configuration information for parallel port
*/
local_config[PARALLEL_0].port1 = ppt_base.by_field.addr9_2 << 2;
local_config[PARALLEL_0].irq =
SMC37c669_xlate_irq(
SMC37c669_DEVICE_IRQ( ppt_fdc_irqs.by_field.ppt_irq )
);
local_config[PARALLEL_0].drq =
SMC37c669_xlate_drq(
SMC37c669_DEVICE_DRQ( ppt_fdc_drqs.by_field.ppt_drq )
);
/*
** Get floppy controller base address
*/
fdc_base.as_uchar =
SMC37c669_read_config( SMC37c669_FDC_BASE_ADDRESS_INDEX );
/*
** Store local configuration information for floppy controller
*/
local_config[FLOPPY_0].port1 = fdc_base.by_field.addr9_4 << 4;
local_config[FLOPPY_0].irq =
SMC37c669_xlate_irq(
SMC37c669_DEVICE_IRQ( ppt_fdc_irqs.by_field.fdc_irq )
);
local_config[FLOPPY_0].drq =
SMC37c669_xlate_drq(
SMC37c669_DEVICE_DRQ( ppt_fdc_drqs.by_field.fdc_drq )
);
/*
** Get IDE controller base address
*/
ide_base.as_uchar =
SMC37c669_read_config( SMC37c669_IDE_BASE_ADDRESS_INDEX );
/*
** Get IDE alternate status base address
*/
ide_alt.as_uchar =
SMC37c669_read_config( SMC37c669_IDE_ALTERNATE_ADDRESS_INDEX );
/*
** Store local configuration information for IDE controller
*/
local_config[IDE_0].port1 = ide_base.by_field.addr9_4 << 4;
local_config[IDE_0].port2 = ide_alt.by_field.addr9_4 << 4;
local_config[IDE_0].irq = 14;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function returns a pointer to the local shadow
** configuration of the requested device function.
**
** FORMAL PARAMETERS:
**
** func:
** Which device function
**
** RETURN VALUE:
**
** Returns a pointer to the DEVICE_CONFIG structure for the
** requested function, otherwise, NULL.
**
** SIDE EFFECTS:
**
** {@description or none@}
**
**--
*/
static struct DEVICE_CONFIG * __init SMC37c669_get_config( unsigned int func )
{
struct DEVICE_CONFIG *cp = NULL;
switch ( func ) {
case SERIAL_0:
cp = &local_config[ SERIAL_0 ];
break;
case SERIAL_1:
cp = &local_config[ SERIAL_1 ];
break;
case PARALLEL_0:
cp = &local_config[ PARALLEL_0 ];
break;
case FLOPPY_0:
cp = &local_config[ FLOPPY_0 ];
break;
case IDE_0:
cp = &local_config[ IDE_0 ];
break;
}
return cp;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function translates IRQs back and forth between ISA
** IRQs and SMC37c669 device IRQs.
**
** FORMAL PARAMETERS:
**
** irq:
** The IRQ to translate
**
** RETURN VALUE:
**
** Returns the translated IRQ, otherwise, returns -1.
**
** SIDE EFFECTS:
**
** {@description or none@}
**
**--
*/
static int __init SMC37c669_xlate_irq ( int irq )
{
int i, translated_irq = -1;
if ( SMC37c669_IS_DEVICE_IRQ( irq ) ) {
/*
** We are translating a device IRQ to an ISA IRQ
*/
for ( i = 0; ( SMC37c669_irq_table[i].device_irq != -1 ) || ( SMC37c669_irq_table[i].isa_irq != -1 ); i++ ) {
if ( irq == SMC37c669_irq_table[i].device_irq ) {
translated_irq = SMC37c669_irq_table[i].isa_irq;
break;
}
}
}
else {
/*
** We are translating an ISA IRQ to a device IRQ
*/
for ( i = 0; ( SMC37c669_irq_table[i].isa_irq != -1 ) || ( SMC37c669_irq_table[i].device_irq != -1 ); i++ ) {
if ( irq == SMC37c669_irq_table[i].isa_irq ) {
translated_irq = SMC37c669_irq_table[i].device_irq;
break;
}
}
}
return translated_irq;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function translates DMA channels back and forth between
** ISA DMA channels and SMC37c669 device DMA channels.
**
** FORMAL PARAMETERS:
**
** drq:
** The DMA channel to translate
**
** RETURN VALUE:
**
** Returns the translated DMA channel, otherwise, returns -1
**
** SIDE EFFECTS:
**
** {@description or none@}
**
**--
*/
static int __init SMC37c669_xlate_drq ( int drq )
{
int i, translated_drq = -1;
if ( SMC37c669_IS_DEVICE_DRQ( drq ) ) {
/*
** We are translating a device DMA channel to an ISA DMA channel
*/
for ( i = 0; ( SMC37c669_drq_table[i].device_drq != -1 ) || ( SMC37c669_drq_table[i].isa_drq != -1 ); i++ ) {
if ( drq == SMC37c669_drq_table[i].device_drq ) {
translated_drq = SMC37c669_drq_table[i].isa_drq;
break;
}
}
}
else {
/*
** We are translating an ISA DMA channel to a device DMA channel
*/
for ( i = 0; ( SMC37c669_drq_table[i].isa_drq != -1 ) || ( SMC37c669_drq_table[i].device_drq != -1 ); i++ ) {
if ( drq == SMC37c669_drq_table[i].isa_drq ) {
translated_drq = SMC37c669_drq_table[i].device_drq;
break;
}
}
}
return translated_drq;
}
#if 0
int __init smcc669_init ( void )
{
struct INODE *ip;
allocinode( smc_ddb.name, 1, &ip );
ip->dva = &smc_ddb;
ip->attr = ATTR$M_WRITE | ATTR$M_READ;
ip->len[0] = 0x30;
ip->misc = 0;
INODE_UNLOCK( ip );
return msg_success;
}
int __init smcc669_open( struct FILE *fp, char *info, char *next, char *mode )
{
struct INODE *ip;
/*
** Allow multiple readers but only one writer. ip->misc keeps track
** of the number of writers
*/
ip = fp->ip;
INODE_LOCK( ip );
if ( fp->mode & ATTR$M_WRITE ) {
if ( ip->misc ) {
INODE_UNLOCK( ip );
return msg_failure; /* too many writers */
}
ip->misc++;
}
/*
** Treat the information field as a byte offset
*/
*fp->offset = xtoi( info );
INODE_UNLOCK( ip );
return msg_success;
}
int __init smcc669_close( struct FILE *fp )
{
struct INODE *ip;
ip = fp->ip;
if ( fp->mode & ATTR$M_WRITE ) {
INODE_LOCK( ip );
ip->misc--;
INODE_UNLOCK( ip );
}
return msg_success;
}
int __init smcc669_read( struct FILE *fp, int size, int number, unsigned char *buf )
{
int i;
int length;
int nbytes;
struct INODE *ip;
/*
** Always access a byte at a time
*/
ip = fp->ip;
length = size * number;
nbytes = 0;
SMC37c669_config_mode( TRUE );
for ( i = 0; i < length; i++ ) {
if ( !inrange( *fp->offset, 0, ip->len[0] ) )
break;
*buf++ = SMC37c669_read_config( *fp->offset );
*fp->offset += 1;
nbytes++;
}
SMC37c669_config_mode( FALSE );
return nbytes;
}
int __init smcc669_write( struct FILE *fp, int size, int number, unsigned char *buf )
{
int i;
int length;
int nbytes;
struct INODE *ip;
/*
** Always access a byte at a time
*/
ip = fp->ip;
length = size * number;
nbytes = 0;
SMC37c669_config_mode( TRUE );
for ( i = 0; i < length; i++ ) {
if ( !inrange( *fp->offset, 0, ip->len[0] ) )
break;
SMC37c669_write_config( *fp->offset, *buf );
*fp->offset += 1;
buf++;
nbytes++;
}
SMC37c669_config_mode( FALSE );
return nbytes;
}
#endif
void __init
SMC37c669_dump_registers(void)
{
int i;
for (i = 0; i <= 0x29; i++)
printk("-- CR%02x : %02x\n", i, SMC37c669_read_config(i));
}
/*+
* ============================================================================
* = SMC_init - SMC37c669 Super I/O controller initialization =
* ============================================================================
*
* OVERVIEW:
*
* This routine configures and enables device functions on the
* SMC37c669 Super I/O controller.
*
* FORM OF CALL:
*
* SMC_init( );
*
* RETURNS:
*
* Nothing
*
* ARGUMENTS:
*
* None
*
* SIDE EFFECTS:
*
* None
*
*/
void __init SMC669_Init ( int index )
{
SMC37c669_CONFIG_REGS *SMC_base;
unsigned long flags;
local_irq_save(flags);
if ( ( SMC_base = SMC37c669_detect( index ) ) != NULL ) {
#if SMC_DEBUG
SMC37c669_config_mode( TRUE );
SMC37c669_dump_registers( );
SMC37c669_config_mode( FALSE );
SMC37c669_display_device_info( );
#endif
SMC37c669_disable_device( SERIAL_0 );
SMC37c669_configure_device(
SERIAL_0,
COM1_BASE,
COM1_IRQ,
-1
);
SMC37c669_enable_device( SERIAL_0 );
SMC37c669_disable_device( SERIAL_1 );
SMC37c669_configure_device(
SERIAL_1,
COM2_BASE,
COM2_IRQ,
-1
);
SMC37c669_enable_device( SERIAL_1 );
SMC37c669_disable_device( PARALLEL_0 );
SMC37c669_configure_device(
PARALLEL_0,
PARP_BASE,
PARP_IRQ,
PARP_DRQ
);
SMC37c669_enable_device( PARALLEL_0 );
SMC37c669_disable_device( FLOPPY_0 );
SMC37c669_configure_device(
FLOPPY_0,
FDC_BASE,
FDC_IRQ,
FDC_DRQ
);
SMC37c669_enable_device( FLOPPY_0 );
/* Wake up sometimes forgotten floppy, especially on DP264. */
outb(0xc, 0x3f2);
SMC37c669_disable_device( IDE_0 );
#if SMC_DEBUG
SMC37c669_config_mode( TRUE );
SMC37c669_dump_registers( );
SMC37c669_config_mode( FALSE );
SMC37c669_display_device_info( );
#endif
local_irq_restore(flags);
printk( "SMC37c669 Super I/O Controller found @ 0x%p\n",
SMC_base );
}
else {
local_irq_restore(flags);
#if SMC_DEBUG
printk( "No SMC37c669 Super I/O Controller found\n" );
#endif
}
}
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