1 files changed, 277 insertions, 0 deletions

diff --git a/arch/alpha/kernel/smc37c93x.c b/arch/alpha/kernel/smc37c93x.c
new file mode 100644
index 000000000000..421e51ea6bb7
--- /dev/null
+++ b/arch/alpha/kernel/smc37c93x.c
@@ -0,0 +1,277 @@
+/*
+ * SMC 37C93X initialization code
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+
+#include <linux/slab.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 char devRev;
+
+        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);
+                        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;
+        }
+}