Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 968 insertions, 0 deletions

diff --git a/drivers/pcmcia/hd64465_ss.c b/drivers/pcmcia/hd64465_ss.c
new file mode 100644
index 000000000000..5e6c4ba7d995
--- /dev/null
+++ b/drivers/pcmcia/hd64465_ss.c
@@ -0,0 +1,968 @@
+/*
+ * $Id: hd64465_ss.c,v 1.7 2003/07/06 14:42:50 lethal Exp $
+ *
+ * Device driver for the PCMCIA controller module of the
+ * Hitachi HD64465 handheld companion chip.
+ *
+ * Note that the HD64465 provides a very thin PCMCIA host bridge
+ * layer, requiring a lot of the work of supporting cards to be
+ * performed by the processor.  For example: mapping of card
+ * interrupts to processor IRQs is done by IRQ demuxing software;
+ * IO and memory mappings are fixed; setting voltages according
+ * to card Voltage Select pins etc is done in software.
+ *
+ * Note also that this driver uses only the simple, fixed,
+ * 16MB, 16-bit wide mappings to PCMCIA spaces defined by the
+ * HD64465.  Larger mappings, smaller mappings, or mappings of
+ * different width to the same socket, are all possible only by
+ * involving the SH7750's MMU, which is considered unnecessary here.
+ * The downside is that it may be possible for some drivers to
+ * break because they need or expect 8-bit mappings.
+ *
+ * This driver currently supports only the following configuration:
+ * SH7750 CPU, HD64465, TPS2206 voltage control chip.
+ *
+ * by Greg Banks <gbanks@pocketpenguins.com>
+ * (c) 2000 PocketPenguins Inc
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <asm/errno.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+
+#include <asm/io.h>
+#include <asm/hd64465/hd64465.h>
+#include <asm/hd64465/io.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/bulkmem.h>
+#include "cs_internal.h"
+
+#define MODNAME "hd64465_ss"
+
+/* #define HD64465_DEBUG 1 */
+
+#if HD64465_DEBUG
+#define DPRINTK(args...)        printk(MODNAME ": " args)
+#else
+#define DPRINTK(args...)
+#endif
+
+extern int hd64465_io_debug;
+extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags);
+extern void p3_iounmap(void *addr);
+
+/*============================================================*/
+
+#define HS_IO_MAP_SIZE  (64*1024)
+
+typedef struct hs_socket_t
+{
+    unsigned int        number;
+    u_int               irq;
+    u_long              mem_base;
+    void                *io_base;
+    u_long              mem_length;
+    u_int               ctrl_base;
+    socket_state_t      state;
+    pccard_io_map       io_maps[MAX_IO_WIN];
+    pccard_mem_map      mem_maps[MAX_WIN];
+    struct pcmcia_socket        socket;
+} hs_socket_t;
+
+
+
+#define HS_MAX_SOCKETS 2
+static hs_socket_t hs_sockets[HS_MAX_SOCKETS];
+
+#define hs_in(sp, r)        inb((sp)->ctrl_base + (r))
+#define hs_out(sp, v, r)    outb(v, (sp)->ctrl_base + (r))
+
+
+/* translate a boolean value to a bit in a register */
+#define bool_to_regbit(sp, r, bi, bo)           \
+    do {                                        \
+        unsigned short v = hs_in(sp, r);        \
+        if (bo)                                 \
+            v |= (bi);                          \
+        else                                    \
+            v &= ~(bi);                         \
+        hs_out(sp, v, r);                       \
+    } while(0)
+    
+/* register offsets from HD64465_REG_PCC[01]ISR */
+#define ISR     0x0
+#define GCR     0x2
+#define CSCR    0x4
+#define CSCIER  0x6
+#define SCR     0x8
+
+
+/* Mask and values for CSCIER register */
+#define IER_MASK    0x80
+#define IER_ON      0x3f        /* interrupts on */
+#define IER_OFF     0x00        /* interrupts off */
+
+/*============================================================*/
+
+#if HD64465_DEBUG > 10
+
+static void cis_hex_dump(const unsigned char *x, int len)
+{
+        int i;
+        
+        for (i=0 ; i<len ; i++)
+        {
+            if (!(i & 0xf))
+                printk("\n%08x", (unsigned)(x + i));
+            printk(" %02x", *(volatile unsigned short*)x);
+            x += 2;
+        }
+        printk("\n");
+}
+
+#endif
+/*============================================================*/
+
+/*
+ * This code helps create the illusion that the IREQ line from
+ * the PC card is mapped to one of the CPU's IRQ lines by the
+ * host bridge hardware (which is how every host bridge *except*
+ * the HD64465 works).  In particular, it supports enabling
+ * and disabling the IREQ line by code which knows nothing
+ * about the host bridge (e.g. device drivers, IDE code) using
+ * the request_irq(), free_irq(), probe_irq_on() and probe_irq_off()
+ * functions.  Also, it supports sharing the mapped IRQ with
+ * real hardware IRQs from the -IRL0-3 lines.
+ */
+
+#define HS_NUM_MAPPED_IRQS  16  /* Limitation of the PCMCIA code */
+static struct
+{
+    /* index is mapped irq number */
+    hs_socket_t *sock;
+    hw_irq_controller *old_handler;
+} hs_mapped_irq[HS_NUM_MAPPED_IRQS];
+
+static void hs_socket_enable_ireq(hs_socket_t *sp)
+{
+        unsigned short cscier;
+        
+        DPRINTK("hs_socket_enable_ireq(sock=%d)\n", sp->number);
+
+        cscier = hs_in(sp, CSCIER);
+        cscier &= ~HD64465_PCCCSCIER_PIREQE_MASK;
+        cscier |= HD64465_PCCCSCIER_PIREQE_LEVEL;
+        hs_out(sp, cscier, CSCIER);
+}
+
+static void hs_socket_disable_ireq(hs_socket_t *sp)
+{
+        unsigned short cscier;
+        
+        DPRINTK("hs_socket_disable_ireq(sock=%d)\n", sp->number);
+        
+        cscier = hs_in(sp, CSCIER);
+        cscier &= ~HD64465_PCCCSCIER_PIREQE_MASK;
+        hs_out(sp, cscier, CSCIER);
+}
+
+static unsigned int hs_startup_irq(unsigned int irq)
+{
+        hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
+        hs_mapped_irq[irq].old_handler->startup(irq);
+        return 0;
+}
+
+static void hs_shutdown_irq(unsigned int irq)
+{
+        hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
+        hs_mapped_irq[irq].old_handler->shutdown(irq);
+}
+
+static void hs_enable_irq(unsigned int irq)
+{
+        hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
+        hs_mapped_irq[irq].old_handler->enable(irq);
+}
+
+static void hs_disable_irq(unsigned int irq)
+{
+        hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
+        hs_mapped_irq[irq].old_handler->disable(irq);
+}
+
+extern struct hw_interrupt_type no_irq_type;
+
+static void hs_mask_and_ack_irq(unsigned int irq)
+{
+        hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
+        /* ack_none() spuriously complains about an unexpected IRQ */
+        if (hs_mapped_irq[irq].old_handler != &no_irq_type)
+            hs_mapped_irq[irq].old_handler->ack(irq);
+}
+
+static void hs_end_irq(unsigned int irq)
+{
+        hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
+        hs_mapped_irq[irq].old_handler->end(irq);
+}
+
+
+static struct hw_interrupt_type hd64465_ss_irq_type = {
+        .typename       = "PCMCIA-IRQ",
+        .startup        = hs_startup_irq,
+        .shutdown       = hs_shutdown_irq,
+        .enable         = hs_enable_irq,
+        .disable        = hs_disable_irq,
+        .ack            = hs_mask_and_ack_irq,
+        .end            = hs_end_irq
+};
+
+/* 
+ * This function should only ever be called with interrupts disabled.
+ */
+static void hs_map_irq(hs_socket_t *sp, unsigned int irq)
+{
+        DPRINTK("hs_map_irq(sock=%d irq=%d)\n", sp->number, irq);
+        
+        if (irq >= HS_NUM_MAPPED_IRQS)
+            return;
+
+        hs_mapped_irq[irq].sock = sp;
+        /* insert ourselves as the irq controller */
+        hs_mapped_irq[irq].old_handler = irq_desc[irq].handler;
+        irq_desc[irq].handler = &hd64465_ss_irq_type;
+}
+
+
+/* 
+ * This function should only ever be called with interrupts disabled.
+ */
+static void hs_unmap_irq(hs_socket_t *sp, unsigned int irq)
+{
+        DPRINTK("hs_unmap_irq(sock=%d irq=%d)\n", sp->number, irq);
+        
+        if (irq >= HS_NUM_MAPPED_IRQS)
+            return;
+                
+        /* restore the original irq controller */
+        irq_desc[irq].handler = hs_mapped_irq[irq].old_handler;
+}
+
+/*============================================================*/
+
+
+/*
+ * Set Vpp and Vcc (in tenths of a Volt).  Does not
+ * support the hi-Z state.
+ *
+ * Note, this assumes the board uses a TPS2206 chip to control
+ * the Vcc and Vpp voltages to the hs_sockets.  If your board
+ * uses the MIC2563 (also supported by the HD64465) then you
+ * will have to modify this function.
+ */
+                                         /* 0V   3.3V  5.5V */
+static const u_char hs_tps2206_avcc[3] = { 0x00, 0x04, 0x08 };
+static const u_char hs_tps2206_bvcc[3] = { 0x00, 0x80, 0x40 };
+
+static int hs_set_voltages(hs_socket_t *sp, int Vcc, int Vpp)
+{
+        u_int psr;
+        u_int vcci = 0;
+        u_int sock = sp->number;
+        
+        DPRINTK("hs_set_voltage(%d, %d, %d)\n", sock, Vcc, Vpp);
+
+        switch (Vcc)
+        {
+        case 0:  vcci = 0; break;
+        case 33: vcci = 1; break;
+        case 50: vcci = 2; break;
+        default: return 0;
+        }
+
+        /* Note: Vpp = 120 not supported -- Greg Banks */
+        if (Vpp != 0 && Vpp != Vcc)
+            return 0;
+        
+        /* The PSR register holds 8 of the 9 bits which control
+         * the TPS2206 via its serial interface.
+         */
+        psr = inw(HD64465_REG_PCCPSR);
+        switch (sock)
+        {
+        case 0:
+            psr &= 0x0f;
+            psr |= hs_tps2206_avcc[vcci];
+            psr |= (Vpp == 0 ? 0x00 : 0x02);
+            break;
+        case 1:
+            psr &= 0xf0;
+            psr |= hs_tps2206_bvcc[vcci];
+            psr |= (Vpp == 0 ? 0x00 : 0x20);
+            break;
+        };
+        outw(psr, HD64465_REG_PCCPSR);
+        
+        return 1;
+}
+
+
+/*============================================================*/
+
+/*
+ * Drive the RESET line to the card.
+ */
+static void hs_reset_socket(hs_socket_t *sp, int on)
+{
+        unsigned short v;
+        
+        v = hs_in(sp, GCR);
+        if (on)
+            v |= HD64465_PCCGCR_PCCR;
+        else
+            v &= ~HD64465_PCCGCR_PCCR;
+        hs_out(sp, v, GCR);
+}
+
+/*============================================================*/
+
+static int hs_init(struct pcmcia_socket *s)
+{
+        hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
+        
+        DPRINTK("hs_init(%d)\n", sp->number);
+
+        return 0;
+}
+
+/*============================================================*/
+
+
+static int hs_get_status(struct pcmcia_socket *s, u_int *value)
+{
+        hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
+        unsigned int isr;
+        u_int status = 0;
+        
+        
+        isr = hs_in(sp, ISR);
+
+        /* Card is seated and powered when *both* CD pins are low */
+        if ((isr & HD64465_PCCISR_PCD_MASK) == 0)
+        {
+            status |= SS_DETECT;    /* card present */
+
+            switch (isr & HD64465_PCCISR_PBVD_MASK)
+            {
+            case HD64465_PCCISR_PBVD_BATGOOD:   
+                break;
+            case HD64465_PCCISR_PBVD_BATWARN:
+                status |= SS_BATWARN;
+                break;
+            default:
+                status |= SS_BATDEAD;
+                break;
+            }
+
+            if (isr & HD64465_PCCISR_PREADY)
+                status |= SS_READY;
+
+            if (isr & HD64465_PCCISR_PMWP)
+                status |= SS_WRPROT;
+                
+            /* Voltage Select pins interpreted as per Table 4-5 of the std.
+             * Assuming we have the TPS2206, the socket is a "Low Voltage
+             * key, 3.3V and 5V available, no X.XV available".
+             */
+            switch (isr & (HD64465_PCCISR_PVS2|HD64465_PCCISR_PVS1))
+            {
+            case HD64465_PCCISR_PVS1:
+                printk(KERN_NOTICE MODNAME ": cannot handle X.XV card, ignored\n");
+                status = 0;
+                break;
+            case 0:
+            case HD64465_PCCISR_PVS2:
+                /* 3.3V */
+                status |= SS_3VCARD;
+                break;
+            case HD64465_PCCISR_PVS2|HD64465_PCCISR_PVS1:
+                /* 5V */
+                break;
+            }
+                
+            /* TODO: SS_POWERON */
+            /* TODO: SS_STSCHG */
+        }       
+        
+        DPRINTK("hs_get_status(%d) = %x\n", sock, status);
+        
+        *value = status;
+        return 0;
+}
+
+/*============================================================*/
+
+static int hs_get_socket(struct pcmcia_socket *s, socket_state_t *state)
+{
+        hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
+
+        DPRINTK("hs_get_socket(%d)\n", sock);
+        
+        *state = sp->state;
+        return 0;
+}
+
+/*============================================================*/
+
+static int hs_set_socket(struct pcmcia_socket *s, socket_state_t *state)
+{
+        hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
+        u_long flags;
+        u_int changed;
+        unsigned short cscier;
+
+        DPRINTK("hs_set_socket(sock=%d, flags=%x, csc_mask=%x, Vcc=%d, Vpp=%d, io_irq=%d)\n",
+            sock, state->flags, state->csc_mask, state->Vcc, state->Vpp, state->io_irq);
+        
+        local_irq_save(flags);  /* Don't want interrupts happening here */
+
+        if (state->Vpp != sp->state.Vpp ||
+            state->Vcc != sp->state.Vcc) {
+            if (!hs_set_voltages(sp, state->Vcc, state->Vpp)) {
+                local_irq_restore(flags);
+                return -EINVAL;
+            }
+        }
+
+/*      hd64465_io_debug = 1; */
+        /*
+         * Handle changes in the Card Status Change mask,
+         * by propagating to the CSCR register
+         */     
+        changed = sp->state.csc_mask ^ state->csc_mask;
+        cscier = hs_in(sp, CSCIER);
+            
+        if (changed & SS_DETECT) {
+            if (state->csc_mask & SS_DETECT)
+                cscier |= HD64465_PCCCSCIER_PCDE;
+            else
+                cscier &= ~HD64465_PCCCSCIER_PCDE;
+        }
+
+        if (changed & SS_READY) {
+            if (state->csc_mask & SS_READY)
+                cscier |= HD64465_PCCCSCIER_PRE;
+            else
+                cscier &= ~HD64465_PCCCSCIER_PRE;
+        }
+
+        if (changed & SS_BATDEAD) {
+            if (state->csc_mask & SS_BATDEAD)
+                cscier |= HD64465_PCCCSCIER_PBDE;
+            else
+                cscier &= ~HD64465_PCCCSCIER_PBDE;
+        }
+
+        if (changed & SS_BATWARN) {
+            if (state->csc_mask & SS_BATWARN)
+                cscier |= HD64465_PCCCSCIER_PBWE;
+            else
+                cscier &= ~HD64465_PCCCSCIER_PBWE;
+        }
+
+        if (changed & SS_STSCHG) {
+            if (state->csc_mask & SS_STSCHG)
+                cscier |= HD64465_PCCCSCIER_PSCE;
+            else
+                cscier &= ~HD64465_PCCCSCIER_PSCE;
+        }
+
+        hs_out(sp, cscier, CSCIER);
+
+        if (sp->state.io_irq && !state->io_irq)
+            hs_unmap_irq(sp, sp->state.io_irq);
+        else if (!sp->state.io_irq && state->io_irq)
+            hs_map_irq(sp, state->io_irq);
+
+
+        /*
+         * Handle changes in the flags field,
+         * by propagating to config registers.
+         */     
+        changed = sp->state.flags ^ state->flags;
+
+        if (changed & SS_IOCARD) {
+            DPRINTK("card type: %s\n",
+                    (state->flags & SS_IOCARD ? "i/o" : "memory" ));
+            bool_to_regbit(sp, GCR, HD64465_PCCGCR_PCCT,
+                state->flags & SS_IOCARD);
+        }
+
+        if (changed & SS_RESET) {
+            DPRINTK("%s reset card\n",
+                (state->flags & SS_RESET ? "start" : "stop"));
+            bool_to_regbit(sp, GCR, HD64465_PCCGCR_PCCR,
+                state->flags & SS_RESET);
+        }
+
+        if (changed & SS_OUTPUT_ENA) {
+            DPRINTK("%sabling card output\n",
+                (state->flags & SS_OUTPUT_ENA ? "en" : "dis"));
+            bool_to_regbit(sp, GCR, HD64465_PCCGCR_PDRV,
+                state->flags & SS_OUTPUT_ENA);
+        }
+
+        /* TODO: SS_SPKR_ENA */
+            
+/*      hd64465_io_debug = 0; */
+        sp->state = *state;
+            
+        local_irq_restore(flags);
+
+#if HD64465_DEBUG > 10
+        if (state->flags & SS_OUTPUT_ENA)   
+            cis_hex_dump((const unsigned char*)sp->mem_base, 0x100);
+#endif
+        return 0;
+}
+
+/*============================================================*/
+
+static int hs_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
+{
+        hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
+        int map = io->map;
+        int sock = sp->number;
+        struct pccard_io_map *sio;
+        pgprot_t prot;
+
+        DPRINTK("hs_set_io_map(sock=%d, map=%d, flags=0x%x, speed=%dns, start=%#lx, stop=%#lx)\n",
+            sock, map, io->flags, io->speed, io->start, io->stop);
+        if (map >= MAX_IO_WIN)
+            return -EINVAL;
+        sio = &sp->io_maps[map];
+
+        /* check for null changes */    
+        if (io->flags == sio->flags &&
+            io->start == sio->start &&
+            io->stop == sio->stop)
+            return 0;
+        
+        if (io->flags & MAP_AUTOSZ)
+            prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IODYN);
+        else if (io->flags & MAP_16BIT)
+            prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IO16);
+        else
+            prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IO8);
+
+        /* TODO: handle MAP_USE_WAIT */
+        if (io->flags & MAP_USE_WAIT)
+            printk(KERN_INFO MODNAME ": MAP_USE_WAIT unimplemented\n");
+        /* TODO: handle MAP_PREFETCH */
+        if (io->flags & MAP_PREFETCH)
+            printk(KERN_INFO MODNAME ": MAP_PREFETCH unimplemented\n");
+        /* TODO: handle MAP_WRPROT */
+        if (io->flags & MAP_WRPROT)
+            printk(KERN_INFO MODNAME ": MAP_WRPROT unimplemented\n");
+        /* TODO: handle MAP_0WS */
+        if (io->flags & MAP_0WS)
+            printk(KERN_INFO MODNAME ": MAP_0WS unimplemented\n");
+
+        if (io->flags & MAP_ACTIVE) {
+            unsigned long pstart, psize, paddrbase;
+            
+            paddrbase = virt_to_phys((void*)(sp->mem_base + 2 * HD64465_PCC_WINDOW));
+            pstart = io->start & PAGE_MASK;
+            psize = ((io->stop + PAGE_SIZE) & PAGE_MASK) - pstart;
+
+            /*
+             * Change PTEs in only that portion of the mapping requested
+             * by the caller.  This means that most of the time, most of
+             * the PTEs in the io_vma will be unmapped and only the bottom
+             * page will be mapped.  But the code allows for weird cards
+             * that might want IO ports > 4K.
+             */
+            sp->io_base = p3_ioremap(paddrbase + pstart, psize, pgprot_val(prot));
+            
+            /*
+             * Change the mapping used by inb() outb() etc
+             */
+            hd64465_port_map(io->start,
+                io->stop - io->start + 1,
+                (unsigned long)sp->io_base + io->start, 0);
+        } else {
+            hd64465_port_unmap(sio->start, sio->stop - sio->start + 1);
+            p3_iounmap(sp->io_base);
+        }
+        
+        *sio = *io;
+        return 0;
+}
+
+/*============================================================*/
+
+static int hs_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
+{
+        hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
+        struct pccard_mem_map *smem;
+        int map = mem->map;
+        unsigned long paddr;
+
+#if 0
+        DPRINTK("hs_set_mem_map(sock=%d, map=%d, flags=0x%x, card_start=0x%08x)\n",
+            sock, map, mem->flags, mem->card_start);
+#endif
+
+        if (map >= MAX_WIN)
+            return -EINVAL;
+        smem = &sp->mem_maps[map];
+        
+        paddr = sp->mem_base;               /* base of Attribute mapping */
+        if (!(mem->flags & MAP_ATTRIB))
+            paddr += HD64465_PCC_WINDOW;    /* base of Common mapping */
+        paddr += mem->card_start;
+
+        /* Because we specified SS_CAP_STATIC_MAP, we are obliged
+         * at this time to report the system address corresponding
+         * to the card address requested.  This is how Socket Services
+         * queries our fixed mapping.  I wish this fact had been
+         * documented - Greg Banks.
+         */
+        mem->static_start = paddr;
+        
+        *smem = *mem;
+        
+        return 0;
+}
+
+/* TODO: do we need to use the MMU to access Common memory ??? */
+
+/*============================================================*/
+
+/*
+ * This function is registered with the HD64465 glue code to do a
+ * secondary demux step on the PCMCIA interrupts.  It handles 
+ * mapping the IREQ request from the card to a standard Linux
+ * IRQ, as requested by SocketServices.
+ */
+static int hs_irq_demux(int irq, void *dev)
+{
+        hs_socket_t *sp = (hs_socket_t *)dev;
+        u_int cscr;
+        
+        DPRINTK("hs_irq_demux(irq=%d)\n", irq);
+
+        if (sp->state.io_irq &&
+            (cscr = hs_in(sp, CSCR)) & HD64465_PCCCSCR_PIREQ) {
+            cscr &= ~HD64465_PCCCSCR_PIREQ;
+            hs_out(sp, cscr, CSCR);
+            return sp->state.io_irq;
+        }
+            
+        return irq;
+}
+
+/*============================================================*/
+
+/*
+ * Interrupt handling routine.
+ */
+ 
+static irqreturn_t hs_interrupt(int irq, void *dev, struct pt_regs *regs)
+{
+        hs_socket_t *sp = (hs_socket_t *)dev;
+        u_int events = 0;
+        u_int cscr;
+        
+        
+        cscr = hs_in(sp, CSCR);
+        
+        DPRINTK("hs_interrupt, cscr=%04x\n", cscr);
+
+        /* check for bus-related changes to be reported to Socket Services */
+        if (cscr & HD64465_PCCCSCR_PCDC) {
+            /* double-check for a 16-bit card, as we don't support CardBus */
+            if ((hs_in(sp, ISR) & HD64465_PCCISR_PCD_MASK) != 0) {
+                printk(KERN_NOTICE MODNAME
+                    ": socket %d, card not a supported card type or not inserted correctly\n",
+                    sp->number);
+                /* Don't do the rest unless a card is present */
+                cscr &= ~(HD64465_PCCCSCR_PCDC|
+                          HD64465_PCCCSCR_PRC|
+                          HD64465_PCCCSCR_PBW|
+                          HD64465_PCCCSCR_PBD|
+                          HD64465_PCCCSCR_PSC);
+            } else {
+                cscr &= ~HD64465_PCCCSCR_PCDC;
+                events |= SS_DETECT;            /* card insertion or removal */
+            }
+        }
+        if (cscr & HD64465_PCCCSCR_PRC) {
+            cscr &= ~HD64465_PCCCSCR_PRC;
+            events |= SS_READY;         /* ready signal changed */
+        }
+        if (cscr & HD64465_PCCCSCR_PBW) {
+            cscr &= ~HD64465_PCCCSCR_PSC;
+            events |= SS_BATWARN;       /* battery warning */
+        }
+        if (cscr & HD64465_PCCCSCR_PBD) {
+            cscr &= ~HD64465_PCCCSCR_PSC;
+            events |= SS_BATDEAD;       /* battery dead */
+        }
+        if (cscr & HD64465_PCCCSCR_PSC) {
+            cscr &= ~HD64465_PCCCSCR_PSC;
+            events |= SS_STSCHG;        /* STSCHG (status changed) signal */
+        }
+        
+        if (cscr & HD64465_PCCCSCR_PIREQ) {
+            cscr &= ~HD64465_PCCCSCR_PIREQ;
+
+            /* This should have been dealt with during irq demux */         
+            printk(KERN_NOTICE MODNAME ": unexpected IREQ from card\n");
+        }
+
+        hs_out(sp, cscr, CSCR);
+
+        if (events)
+                pcmcia_parse_events(&sp->socket, events);
+
+        return IRQ_HANDLED;
+}
+
+/*============================================================*/
+
+static struct pccard_operations hs_operations = {
+        .init                   = hs_init,
+        .get_status             = hs_get_status,
+        .get_socket             = hs_get_socket,
+        .set_socket             = hs_set_socket,
+        .set_io_map             = hs_set_io_map,
+        .set_mem_map            = hs_set_mem_map,
+};
+
+static int hs_init_socket(hs_socket_t *sp, int irq, unsigned long mem_base,
+            unsigned int ctrl_base)
+{
+        unsigned short v;
+        int i, err;
+
+        memset(sp, 0, sizeof(*sp));
+        sp->irq = irq;
+        sp->mem_base = mem_base;
+        sp->mem_length = 4*HD64465_PCC_WINDOW;  /* 16MB */
+        sp->ctrl_base = ctrl_base;
+        
+        for (i=0 ; i<MAX_IO_WIN ; i++)
+            sp->io_maps[i].map = i;
+        for (i=0 ; i<MAX_WIN ; i++)
+            sp->mem_maps[i].map = i;
+        
+        hd64465_register_irq_demux(sp->irq, hs_irq_demux, sp);
+        
+        if ((err = request_irq(sp->irq, hs_interrupt, SA_INTERRUPT, MODNAME, sp)) < 0)
+            return err;
+        if (request_mem_region(sp->mem_base, sp->mem_length, MODNAME) == 0) {
+            sp->mem_base = 0;
+            return -ENOMEM;
+        }
+
+
+        /* According to section 3.2 of the PCMCIA standard, low-voltage
+         * capable cards must implement cold insertion, i.e. Vpp and
+         * Vcc set to 0 before card is inserted.
+         */
+        /*hs_set_voltages(sp, 0, 0);*/
+        
+        /* hi-Z the outputs to the card and set 16MB map mode */
+        v = hs_in(sp, GCR);
+        v &= ~HD64465_PCCGCR_PCCT;      /* memory-only card */
+        hs_out(sp, v, GCR);
+
+        v = hs_in(sp, GCR);
+        v |= HD64465_PCCGCR_PDRV;       /* enable outputs to card */
+        hs_out(sp, v, GCR);
+
+        v = hs_in(sp, GCR);
+        v |= HD64465_PCCGCR_PMMOD;      /* 16MB mapping mode */
+        hs_out(sp, v, GCR);
+
+        v = hs_in(sp, GCR);
+        /* lowest 16MB of Common */
+        v &= ~(HD64465_PCCGCR_PPA25|HD64465_PCCGCR_PPA24); 
+        hs_out(sp, v, GCR);
+        
+        hs_reset_socket(sp, 1);
+
+        printk(KERN_INFO "HD64465 PCMCIA bridge socket %d at 0x%08lx irq %d\n",
+                i, sp->mem_base, sp->irq);
+
+        return 0;
+}
+
+static void hs_exit_socket(hs_socket_t *sp)
+{
+        unsigned short cscier, gcr;
+        unsigned long flags;
+        
+        local_irq_save(flags);
+
+        /* turn off interrupts in hardware */
+        cscier = hs_in(sp, CSCIER);
+        cscier = (cscier & IER_MASK) | IER_OFF;
+        hs_out(sp, cscier, CSCIER);
+        
+        /* hi-Z the outputs to the card */
+        gcr = hs_in(sp, GCR);
+        gcr &= HD64465_PCCGCR_PDRV;
+        hs_out(sp, gcr, GCR);
+
+        /* power the card down */
+        hs_set_voltages(sp, 0, 0);
+
+        if (sp->mem_base != 0)
+            release_mem_region(sp->mem_base, sp->mem_length);
+        if (sp->irq != 0) {
+            free_irq(sp->irq, hs_interrupt);
+            hd64465_unregister_irq_demux(sp->irq);
+        }
+
+        local_irq_restore(flags);
+}
+
+static int hd64465_suspend(struct device *dev, u32 state, u32 level)
+{
+        int ret = 0;
+        if (level == SUSPEND_SAVE_STATE)
+                ret = pcmcia_socket_dev_suspend(dev, state);
+        return ret;
+}
+
+static int hd64465_resume(struct device *dev, u32 level)
+{
+        int ret = 0;
+        if (level == RESUME_RESTORE_STATE)
+                ret = pcmcia_socket_dev_resume(dev);
+        return ret;
+}
+
+static struct device_driver hd64465_driver = {
+        .name = "hd64465-pcmcia",
+        .bus = &platform_bus_type,
+        .suspend = hd64465_suspend,
+        .resume = hd64465_resume,
+};
+
+static struct platform_device hd64465_device = {
+        .name = "hd64465-pcmcia",
+        .id = 0,
+};
+
+static int __init init_hs(void)
+{
+        int i;
+        unsigned short v;
+
+/*      hd64465_io_debug = 1; */
+        if (driver_register(&hd64465_driver))
+                return -EINVAL;
+        
+        /* Wake both sockets out of STANDBY mode */
+        /* TODO: wait 15ms */
+        v = inw(HD64465_REG_SMSCR);
+        v &= ~(HD64465_SMSCR_PC0ST|HD64465_SMSCR_PC1ST);
+        outw(v, HD64465_REG_SMSCR);
+
+        /* keep power controller out of shutdown mode */
+        v = inb(HD64465_REG_PCC0SCR);
+        v |= HD64465_PCCSCR_SHDN;
+        outb(v, HD64465_REG_PCC0SCR);
+
+        /* use serial (TPS2206) power controller */
+        v = inb(HD64465_REG_PCC0CSCR);
+        v |= HD64465_PCCCSCR_PSWSEL;
+        outb(v, HD64465_REG_PCC0CSCR);
+
+        /*
+         * Setup hs_sockets[] structures and request system resources.
+         * TODO: on memory allocation failure, power down the socket
+         *       before quitting.
+         */
+        for (i=0; i<HS_MAX_SOCKETS; i++) {
+                hs_set_voltages(&hs_sockets[i], 0, 0);
+
+                hs_sockets[i].socket.features |=  SS_CAP_PCCARD | SS_CAP_STATIC_MAP;      /* mappings are fixed in host memory */
+                hs_sockets[i].socket.resource_ops = &pccard_static_ops;
+                hs_sockets[i].socket.irq_mask =  0xffde;/*0xffff*/          /* IRQs mapped in s/w so can do any, really */
+                hs_sockets[i].socket.map_size = HD64465_PCC_WINDOW;     /* 16MB fixed window size */
+
+                hs_sockets[i].socket.owner = THIS_MODULE;
+                hs_sockets[i].socket.ss_entry = &hs_operations;
+        }
+
+        i = hs_init_socket(&hs_sockets[0],
+            HD64465_IRQ_PCMCIA0,
+            HD64465_PCC0_BASE,
+            HD64465_REG_PCC0ISR);
+        if (i < 0) {
+                unregister_driver(&hd64465_driver);
+                return i;
+        }
+        i = hs_init_socket(&hs_sockets[1],
+            HD64465_IRQ_PCMCIA1,
+            HD64465_PCC1_BASE,
+            HD64465_REG_PCC1ISR);
+        if (i < 0) {
+                unregister_driver(&hd64465_driver);
+                return i;
+        }
+
+/*      hd64465_io_debug = 0; */
+
+        platform_device_register(&hd64465_device);
+
+        for (i=0; i<HS_MAX_SOCKETS; i++) {
+                unsigned int ret;
+                hs_sockets[i].socket.dev.dev = &hd64465_device.dev;             
+                hs_sockets[i].number = i;
+                ret = pcmcia_register_socket(&hs_sockets[i].socket);
+                if (ret && i)
+                        pcmcia_unregister_socket(&hs_sockets[0].socket);
+        }
+
+        return 0;
+}
+
+static void __exit exit_hs(void)
+{
+        int i;
+
+        for (i=0 ; i<HS_MAX_SOCKETS ; i++) {
+                pcmcia_unregister_socket(&hs_sockets[i].socket);
+                hs_exit_socket(&hs_sockets[i]);
+        }
+
+        platform_device_unregister(&hd64465_device);
+        unregister_driver(&hd64465_driver);
+}
+
+module_init(init_hs);
+module_exit(exit_hs);
+
+/*============================================================*/
+/*END*/