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Diffstat (limited to 'arch/alpha/kernel/smc37c93x.c')
| -rw-r--r-- | arch/alpha/kernel/smc37c93x.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/arch/alpha/kernel/smc37c93x.c b/arch/alpha/kernel/smc37c93x.c new file mode 100644 index 0000000000..71cd7aca38 --- /dev/null +++ b/arch/alpha/kernel/smc37c93x.c @@ -0,0 +1,274 @@ +// 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> + +#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; + } +} |