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// SPDX-License-Identifier: GPL-2.0
/*
* SMC 37C93X initialization code
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/hwrpb.h>
#include <asm/io.h>
#include <asm/segment.h>
#define SMC_DEBUG 0
#if SMC_DEBUG
# define DBG_DEVS(args) printk args
#else
# define DBG_DEVS(args)
#endif
#define KB 1024
#define MB (1024*KB)
#define GB (1024*MB)
/* device "activate" register contents */
#define DEVICE_ON 1
#define DEVICE_OFF 0
/* configuration on/off keys */
#define CONFIG_ON_KEY 0x55
#define CONFIG_OFF_KEY 0xaa
/* configuration space device definitions */
#define FDC 0
#define IDE1 1
#define IDE2 2
#define PARP 3
#define SER1 4
#define SER2 5
#define RTCL 6
#define KYBD 7
#define AUXIO 8
/* Chip register offsets from base */
#define CONFIG_CONTROL 0x02
#define INDEX_ADDRESS 0x03
#define LOGICAL_DEVICE_NUMBER 0x07
#define DEVICE_ID 0x20
#define DEVICE_REV 0x21
#define POWER_CONTROL 0x22
#define POWER_MGMT 0x23
#define OSC 0x24
#define ACTIVATE 0x30
#define ADDR_HI 0x60
#define ADDR_LO 0x61
#define INTERRUPT_SEL 0x70
#define INTERRUPT_SEL_2 0x72 /* KYBD/MOUS only */
#define DMA_CHANNEL_SEL 0x74 /* FDC/PARP only */
#define FDD_MODE_REGISTER 0x90
#define FDD_OPTION_REGISTER 0x91
/* values that we read back that are expected ... */
#define VALID_DEVICE_ID 2
/* default device addresses */
#define KYBD_INTERRUPT 1
#define MOUS_INTERRUPT 12
#define COM2_BASE 0x2f8
#define COM2_INTERRUPT 3
#define COM1_BASE 0x3f8
#define COM1_INTERRUPT 4
#define PARP_BASE 0x3bc
#define PARP_INTERRUPT 7
static unsigned long __init SMCConfigState(unsigned long baseAddr)
{
unsigned char devId;
unsigned long configPort;
unsigned long indexPort;
unsigned long dataPort;
int i;
configPort = indexPort = baseAddr;
dataPort = configPort + 1;
#define NUM_RETRIES 5
for (i = 0; i < NUM_RETRIES; i++)
{
outb(CONFIG_ON_KEY, configPort);
outb(CONFIG_ON_KEY, configPort);
outb(DEVICE_ID, indexPort);
devId = inb(dataPort);
if (devId == VALID_DEVICE_ID) {
outb(DEVICE_REV, indexPort);
/* unsigned char devRev = */ inb(dataPort);
break;
}
else
udelay(100);
}
return (i != NUM_RETRIES) ? baseAddr : 0L;
}
static void __init SMCRunState(unsigned long baseAddr)
{
outb(CONFIG_OFF_KEY, baseAddr);
}
static unsigned long __init SMCDetectUltraIO(void)
{
unsigned long baseAddr;
baseAddr = 0x3F0;
if ( ( baseAddr = SMCConfigState( baseAddr ) ) == 0x3F0 ) {
return( baseAddr );
}
baseAddr = 0x370;
if ( ( baseAddr = SMCConfigState( baseAddr ) ) == 0x370 ) {
return( baseAddr );
}
return( ( unsigned long )0 );
}
static void __init SMCEnableDevice(unsigned long baseAddr,
unsigned long device,
unsigned long portaddr,
unsigned long interrupt)
{
unsigned long indexPort;
unsigned long dataPort;
indexPort = baseAddr;
dataPort = baseAddr + 1;
outb(LOGICAL_DEVICE_NUMBER, indexPort);
outb(device, dataPort);
outb(ADDR_LO, indexPort);
outb(( portaddr & 0xFF ), dataPort);
outb(ADDR_HI, indexPort);
outb((portaddr >> 8) & 0xFF, dataPort);
outb(INTERRUPT_SEL, indexPort);
outb(interrupt, dataPort);
outb(ACTIVATE, indexPort);
outb(DEVICE_ON, dataPort);
}
static void __init SMCEnableKYBD(unsigned long baseAddr)
{
unsigned long indexPort;
unsigned long dataPort;
indexPort = baseAddr;
dataPort = baseAddr + 1;
outb(LOGICAL_DEVICE_NUMBER, indexPort);
outb(KYBD, dataPort);
outb(INTERRUPT_SEL, indexPort); /* Primary interrupt select */
outb(KYBD_INTERRUPT, dataPort);
outb(INTERRUPT_SEL_2, indexPort); /* Secondary interrupt select */
outb(MOUS_INTERRUPT, dataPort);
outb(ACTIVATE, indexPort);
outb(DEVICE_ON, dataPort);
}
static void __init SMCEnableFDC(unsigned long baseAddr)
{
unsigned long indexPort;
unsigned long dataPort;
unsigned char oldValue;
indexPort = baseAddr;
dataPort = baseAddr + 1;
outb(LOGICAL_DEVICE_NUMBER, indexPort);
outb(FDC, dataPort);
outb(FDD_MODE_REGISTER, indexPort);
oldValue = inb(dataPort);
oldValue |= 0x0E; /* Enable burst mode */
outb(oldValue, dataPort);
outb(INTERRUPT_SEL, indexPort); /* Primary interrupt select */
outb(0x06, dataPort );
outb(DMA_CHANNEL_SEL, indexPort); /* DMA channel select */
outb(0x02, dataPort);
outb(ACTIVATE, indexPort);
outb(DEVICE_ON, dataPort);
}
#if SMC_DEBUG
static void __init SMCReportDeviceStatus(unsigned long baseAddr)
{
unsigned long indexPort;
unsigned long dataPort;
unsigned char currentControl;
indexPort = baseAddr;
dataPort = baseAddr + 1;
outb(POWER_CONTROL, indexPort);
currentControl = inb(dataPort);
printk(currentControl & (1 << FDC)
? "\t+FDC Enabled\n" : "\t-FDC Disabled\n");
printk(currentControl & (1 << IDE1)
? "\t+IDE1 Enabled\n" : "\t-IDE1 Disabled\n");
printk(currentControl & (1 << IDE2)
? "\t+IDE2 Enabled\n" : "\t-IDE2 Disabled\n");
printk(currentControl & (1 << PARP)
? "\t+PARP Enabled\n" : "\t-PARP Disabled\n");
printk(currentControl & (1 << SER1)
? "\t+SER1 Enabled\n" : "\t-SER1 Disabled\n");
printk(currentControl & (1 << SER2)
? "\t+SER2 Enabled\n" : "\t-SER2 Disabled\n");
printk( "\n" );
}
#endif
int __init SMC93x_Init(void)
{
unsigned long SMCUltraBase;
unsigned long flags;
local_irq_save(flags);
if ((SMCUltraBase = SMCDetectUltraIO()) != 0UL) {
#if SMC_DEBUG
SMCReportDeviceStatus(SMCUltraBase);
#endif
SMCEnableDevice(SMCUltraBase, SER1, COM1_BASE, COM1_INTERRUPT);
DBG_DEVS(("SMC FDC37C93X: SER1 done\n"));
SMCEnableDevice(SMCUltraBase, SER2, COM2_BASE, COM2_INTERRUPT);
DBG_DEVS(("SMC FDC37C93X: SER2 done\n"));
SMCEnableDevice(SMCUltraBase, PARP, PARP_BASE, PARP_INTERRUPT);
DBG_DEVS(("SMC FDC37C93X: PARP done\n"));
/* On PC164, IDE on the SMC is not enabled;
CMD646 (PCI) on MB */
SMCEnableKYBD(SMCUltraBase);
DBG_DEVS(("SMC FDC37C93X: KYB done\n"));
SMCEnableFDC(SMCUltraBase);
DBG_DEVS(("SMC FDC37C93X: FDC done\n"));
#if SMC_DEBUG
SMCReportDeviceStatus(SMCUltraBase);
#endif
SMCRunState(SMCUltraBase);
local_irq_restore(flags);
printk("SMC FDC37C93X Ultra I/O Controller found @ 0x%lx\n",
SMCUltraBase);
return 1;
}
else {
local_irq_restore(flags);
DBG_DEVS(("No SMC FDC37C93X Ultra I/O Controller found\n"));
return 0;
}
}
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