[ARM] Add support for ICSIDE interface on RiscPC

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 695 insertions, 0 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index e0820e8dd1c..77846dd0a4f 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -552,6 +552,14 @@ config PATA_PLATFORM
 
           If unsure, say N.
 
+config PATA_ICSIDE
+        tristate "Acorn ICS PATA support"
+        depends on ARM && ARCH_ACORN
+        help
+          On Acorn systems, say Y here if you wish to use the ICS PATA
+          interface card.  This is not required for ICS partition support.
+          If you are unsure, say N to this.
+
 config PATA_IXP4XX_CF
         tristate "IXP4XX Compact Flash support"
         depends on ARCH_IXP4XX
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 13d7397e000..cc8798b1a54 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_PATA_TRIFLEX)	+= pata_triflex.o
 obj-$(CONFIG_PATA_IXP4XX_CF)    += pata_ixp4xx_cf.o
 obj-$(CONFIG_PATA_SCC)          += pata_scc.o
 obj-$(CONFIG_PATA_PLATFORM)     += pata_platform.o
+obj-$(CONFIG_PATA_ICSIDE)       += pata_icside.o
 # Should be last but one libata driver
 obj-$(CONFIG_ATA_GENERIC)       += ata_generic.o
 # Should be last libata driver
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
new file mode 100644
index 00000000000..dbc8ee2adcf
--- /dev/null
+++ b/drivers/ata/pata_icside.c
@@ -0,0 +1,686 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <scsi/scsi_host.h>
+#include <linux/ata.h>
+#include <linux/libata.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+
+#define DRV_NAME        "pata_icside"
+
+#define ICS_IDENT_OFFSET                0x2280
+
+#define ICS_ARCIN_V5_INTRSTAT           0x0000
+#define ICS_ARCIN_V5_INTROFFSET         0x0004
+
+#define ICS_ARCIN_V6_INTROFFSET_1       0x2200
+#define ICS_ARCIN_V6_INTRSTAT_1         0x2290
+#define ICS_ARCIN_V6_INTROFFSET_2       0x3200
+#define ICS_ARCIN_V6_INTRSTAT_2         0x3290
+
+struct portinfo {
+        unsigned int dataoffset;
+        unsigned int ctrloffset;
+        unsigned int stepping;
+};
+
+static const struct portinfo pata_icside_portinfo_v5 = {
+        .dataoffset     = 0x2800,
+        .ctrloffset     = 0x2b80,
+        .stepping       = 6,
+};
+
+static const struct portinfo pata_icside_portinfo_v6_1 = {
+        .dataoffset     = 0x2000,
+        .ctrloffset     = 0x2380,
+        .stepping       = 6,
+};
+
+static const struct portinfo pata_icside_portinfo_v6_2 = {
+        .dataoffset     = 0x3000,
+        .ctrloffset     = 0x3380,
+        .stepping       = 6,
+};
+
+#define PATA_ICSIDE_MAX_SG      128
+
+struct pata_icside_state {
+        void __iomem *irq_port;
+        void __iomem *ioc_base;
+        unsigned int type;
+        unsigned int dma;
+        struct {
+                u8 port_sel;
+                u8 disabled;
+                unsigned int speed[ATA_MAX_DEVICES];
+        } port[2];
+        struct scatterlist sg[PATA_ICSIDE_MAX_SG];
+};
+
+#define ICS_TYPE_A3IN   0
+#define ICS_TYPE_A3USER 1
+#define ICS_TYPE_V6     3
+#define ICS_TYPE_V5     15
+#define ICS_TYPE_NOTYPE ((unsigned int)-1)
+
+/* ---------------- Version 5 PCB Support Functions --------------------- */
+/* Prototype: pata_icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void pata_icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+        struct pata_icside_state *state = ec->irq_data;
+
+        writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+/* Prototype: pata_icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void pata_icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+        struct pata_icside_state *state = ec->irq_data;
+
+        readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+static const expansioncard_ops_t pata_icside_ops_arcin_v5 = {
+        .irqenable      = pata_icside_irqenable_arcin_v5,
+        .irqdisable     = pata_icside_irqdisable_arcin_v5,
+};
+
+
+/* ---------------- Version 6 PCB Support Functions --------------------- */
+/* Prototype: pata_icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void pata_icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+        struct pata_icside_state *state = ec->irq_data;
+        void __iomem *base = state->irq_port;
+
+        if (!state->port[0].disabled)
+                writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
+        if (!state->port[1].disabled)
+                writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
+}
+
+/* Prototype: pata_icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void pata_icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+        struct pata_icside_state *state = ec->irq_data;
+
+        readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+        readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+}
+
+/* Prototype: pata_icside_irqprobe(struct expansion_card *ec)
+ * Purpose  : detect an active interrupt from card
+ */
+static int pata_icside_irqpending_arcin_v6(struct expansion_card *ec)
+{
+        struct pata_icside_state *state = ec->irq_data;
+
+        return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
+               readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
+}
+
+static const expansioncard_ops_t pata_icside_ops_arcin_v6 = {
+        .irqenable      = pata_icside_irqenable_arcin_v6,
+        .irqdisable     = pata_icside_irqdisable_arcin_v6,
+        .irqpending     = pata_icside_irqpending_arcin_v6,
+};
+
+
+/*
+ * SG-DMA support.
+ *
+ * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
+ * There is only one DMA controller per card, which means that only
+ * one drive can be accessed at one time.  NOTE! We do not enforce that
+ * here, but we rely on the main IDE driver spotting that both
+ * interfaces use the same IRQ, which should guarantee this.
+ */
+
+/*
+ * Configure the IOMD to give the appropriate timings for the transfer
+ * mode being requested.  We take the advice of the ATA standards, and
+ * calculate the cycle time based on the transfer mode, and the EIDE
+ * MW DMA specs that the drive provides in the IDENTIFY command.
+ *
+ * We have the following IOMD DMA modes to choose from:
+ *
+ *      Type    Active          Recovery        Cycle
+ *      A       250 (250)       312 (550)       562 (800)
+ *      B       187 (200)       250 (550)       437 (750)
+ *      C       125 (125)       125 (375)       250 (500)
+ *      D       62  (50)        125 (375)       187 (425)
+ *
+ * (figures in brackets are actual measured timings on DIOR/DIOW)
+ *
+ * However, we also need to take care of the read/write active and
+ * recovery timings:
+ *
+ *                      Read    Write
+ *      Mode    Active  -- Recovery --  Cycle   IOMD type
+ *      MW0     215     50      215     480     A
+ *      MW1     80      50      50      150     C
+ *      MW2     70      25      25      120     C
+ */
+static void pata_icside_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct pata_icside_state *state = ap->host->private_data;
+        struct ata_timing t;
+        unsigned int cycle;
+        char iomd_type;
+
+        /*
+         * DMA is based on a 16MHz clock
+         */
+        if (ata_timing_compute(adev, adev->dma_mode, &t, 1000, 1))
+                return;
+
+        /*
+         * Choose the IOMD cycle timing which ensure that the interface
+         * satisfies the measured active, recovery and cycle times.
+         */
+        if (t.active <= 50 && t.recover <= 375 && t.cycle <= 425)
+                iomd_type = 'D', cycle = 187;
+        else if (t.active <= 125 && t.recover <= 375 && t.cycle <= 500)
+                iomd_type = 'C', cycle = 250;
+        else if (t.active <= 200 && t.recover <= 550 && t.cycle <= 750)
+                iomd_type = 'B', cycle = 437;
+        else
+                iomd_type = 'A', cycle = 562;
+
+        ata_dev_printk(adev, KERN_INFO, "timings: act %dns rec %dns cyc %dns (%c)\n",
+                t.active, t.recover, t.cycle, iomd_type);
+
+        state->port[ap->port_no].speed[adev->devno] = cycle;
+}
+
+static void pata_icside_bmdma_setup(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct pata_icside_state *state = ap->host->private_data;
+        struct scatterlist *sg, *rsg = state->sg;
+        unsigned int write = qc->tf.flags & ATA_TFLAG_WRITE;
+
+        /*
+         * We are simplex; BUG if we try to fiddle with DMA
+         * while it's active.
+         */
+        BUG_ON(dma_channel_active(state->dma));
+
+        /*
+         * Copy ATAs scattered sg list into a contiguous array of sg
+         */
+        ata_for_each_sg(sg, qc) {
+                memcpy(rsg, sg, sizeof(*sg));
+                rsg++;
+        }
+
+        /*
+         * Route the DMA signals to the correct interface
+         */
+        writeb(state->port[ap->port_no].port_sel, state->ioc_base);
+
+        set_dma_speed(state->dma, state->port[ap->port_no].speed[qc->dev->devno]);
+        set_dma_sg(state->dma, state->sg, rsg - state->sg);
+        set_dma_mode(state->dma, write ? DMA_MODE_WRITE : DMA_MODE_READ);
+
+        /* issue r/w command */
+        ap->ops->exec_command(ap, &qc->tf);
+}
+
+static void pata_icside_bmdma_start(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct pata_icside_state *state = ap->host->private_data;
+
+        BUG_ON(dma_channel_active(state->dma));
+        enable_dma(state->dma);
+}
+
+static void pata_icside_bmdma_stop(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct pata_icside_state *state = ap->host->private_data;
+
+        disable_dma(state->dma);
+
+        /* see ata_bmdma_stop */
+        ata_altstatus(ap);
+}
+
+static u8 pata_icside_bmdma_status(struct ata_port *ap)
+{
+        struct pata_icside_state *state = ap->host->private_data;
+        void __iomem *irq_port;
+
+        irq_port = state->irq_port + (ap->port_no ? ICS_ARCIN_V6_INTRSTAT_2 :
+                                                    ICS_ARCIN_V6_INTRSTAT_1);
+
+        return readb(irq_port) & 1 ? ATA_DMA_INTR : 0;
+}
+
+static int icside_dma_init(struct ata_probe_ent *ae, struct expansion_card *ec)
+{
+        struct pata_icside_state *state = ae->private_data;
+        int i;
+
+        for (i = 0; i < ATA_MAX_DEVICES; i++) {
+                state->port[0].speed[i] = 480;
+                state->port[1].speed[i] = 480;
+        }
+
+        if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
+                state->dma = ec->dma;
+                ae->mwdma_mask = 0x07;  /* MW0..2 */
+        }
+
+        return 0;
+}
+
+
+static int pata_icside_port_start(struct ata_port *ap)
+{
+        /* No PRD to alloc */
+        return ata_pad_alloc(ap, ap->dev);
+}
+
+static struct scsi_host_template pata_icside_sht = {
+        .module                 = THIS_MODULE,
+        .name                   = DRV_NAME,
+        .ioctl                  = ata_scsi_ioctl,
+        .queuecommand           = ata_scsi_queuecmd,
+        .can_queue              = ATA_DEF_QUEUE,
+        .this_id                = ATA_SHT_THIS_ID,
+        .sg_tablesize           = PATA_ICSIDE_MAX_SG,
+        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
+        .emulated               = ATA_SHT_EMULATED,
+        .use_clustering         = ATA_SHT_USE_CLUSTERING,
+        .proc_name              = DRV_NAME,
+        .dma_boundary           = ~0, /* no dma boundaries */
+        .slave_configure        = ata_scsi_slave_config,
+        .slave_destroy          = ata_scsi_slave_destroy,
+        .bios_param             = ata_std_bios_param,
+};
+
+/* wish this was exported from libata-core */
+static void ata_dummy_noret(struct ata_port *port)
+{
+}
+
+/*
+ * We need to shut down unused ports to prevent spurious interrupts.
+ * FIXME: the libata core doesn't call this function for PATA interfaces.
+ */
+static void pata_icside_port_disable(struct ata_port *ap)
+{
+        struct pata_icside_state *state = ap->host->private_data;
+
+        ata_port_printk(ap, KERN_ERR, "disabling icside port\n");
+
+        ata_port_disable(ap);
+
+        state->port[ap->port_no].disabled = 1;
+
+        if (state->type == ICS_TYPE_V6) {
+                /*
+                 * Disable interrupts from this port, otherwise we
+                 * receive spurious interrupts from the floating
+                 * interrupt line.
+                 */
+                void __iomem *irq_port = state->irq_port +
+                                (ap->port_no ? ICS_ARCIN_V6_INTROFFSET_2 : ICS_ARCIN_V6_INTROFFSET_1);
+                readb(irq_port);
+        }
+}
+
+static u8 pata_icside_irq_ack(struct ata_port *ap, unsigned int chk_drq)
+{
+        unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
+        u8 status;
+
+        status = ata_busy_wait(ap, bits, 1000);
+        if (status & bits)
+                if (ata_msg_err(ap))
+                        printk(KERN_ERR "abnormal status 0x%X\n", status);
+
+        if (ata_msg_intr(ap))
+                printk(KERN_INFO "%s: irq ack: drv_stat 0x%X\n",
+                        __FUNCTION__, status);
+
+        return status;
+}
+
+static struct ata_port_operations pata_icside_port_ops = {
+        .port_disable           = pata_icside_port_disable,
+
+        .set_dmamode            = pata_icside_set_dmamode,
+
+        .tf_load                = ata_tf_load,
+        .tf_read                = ata_tf_read,
+        .exec_command           = ata_exec_command,
+        .check_status           = ata_check_status,
+        .dev_select             = ata_std_dev_select,
+
+        .bmdma_setup            = pata_icside_bmdma_setup,
+        .bmdma_start            = pata_icside_bmdma_start,
+
+        .data_xfer              = ata_data_xfer_noirq,
+
+        /* no need to build any PRD tables for DMA */
+        .qc_prep                = ata_noop_qc_prep,
+        .qc_issue               = ata_qc_issue_prot,
+
+        .freeze                 = ata_bmdma_freeze,
+        .thaw                   = ata_bmdma_thaw,
+        .error_handler          = ata_bmdma_error_handler,
+        .post_internal_cmd      = pata_icside_bmdma_stop,
+
+        .irq_handler            = ata_interrupt,
+        .irq_clear              = ata_dummy_noret,
+        .irq_on                 = ata_irq_on,
+        .irq_ack                = pata_icside_irq_ack,
+
+        .port_start             = pata_icside_port_start,
+
+        .bmdma_stop             = pata_icside_bmdma_stop,
+        .bmdma_status           = pata_icside_bmdma_status,
+};
+
+static void
+pata_icside_add_port(struct ata_probe_ent *ae, void __iomem *base,
+                     const struct portinfo *info)
+{
+        struct ata_ioports *ioaddr = &ae->port[ae->n_ports++];
+        void __iomem *cmd = base + info->dataoffset;
+
+        ioaddr->cmd_addr        = cmd;
+        ioaddr->data_addr       = cmd + (ATA_REG_DATA    << info->stepping);
+        ioaddr->error_addr      = cmd + (ATA_REG_ERR     << info->stepping);
+        ioaddr->feature_addr    = cmd + (ATA_REG_FEATURE << info->stepping);
+        ioaddr->nsect_addr      = cmd + (ATA_REG_NSECT   << info->stepping);
+        ioaddr->lbal_addr       = cmd + (ATA_REG_LBAL    << info->stepping);
+        ioaddr->lbam_addr       = cmd + (ATA_REG_LBAM    << info->stepping);
+        ioaddr->lbah_addr       = cmd + (ATA_REG_LBAH    << info->stepping);
+        ioaddr->device_addr     = cmd + (ATA_REG_DEVICE  << info->stepping);
+        ioaddr->status_addr     = cmd + (ATA_REG_STATUS  << info->stepping);
+        ioaddr->command_addr    = cmd + (ATA_REG_CMD     << info->stepping);
+
+        ioaddr->ctl_addr        = base + info->ctrloffset;
+        ioaddr->altstatus_addr  = ioaddr->ctl_addr;
+}
+
+static int __init
+pata_icside_register_v5(struct ata_probe_ent *ae, struct expansion_card *ec)
+{
+        struct pata_icside_state *state = ae->private_data;
+        void __iomem *base;
+
+        base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
+                       ecard_resource_len(ec, ECARD_RES_MEMC));
+        if (!base)
+                return -ENOMEM;
+
+        state->irq_port = base;
+
+        ec->irqaddr = base + ICS_ARCIN_V5_INTRSTAT;
+        ec->irqmask = 1;
+        ec->irq_data = state;
+        ec->ops = &pata_icside_ops_arcin_v5;
+
+        /*
+         * Be on the safe side - disable interrupts
+         */
+        ec->ops->irqdisable(ec, ec->irq);
+
+        pata_icside_add_port(ae, base, &pata_icside_portinfo_v5);
+
+        return 0;
+}
+
+static int __init
+pata_icside_register_v6(struct ata_probe_ent *ae, struct expansion_card *ec)
+{
+        struct pata_icside_state *state = ae->private_data;
+        void __iomem *ioc_base, *easi_base;
+        unsigned int sel = 0;
+        int ret;
+
+        ioc_base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
+                           ecard_resource_len(ec, ECARD_RES_IOCFAST));
+        if (!ioc_base) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        easi_base = ioc_base;
+
+        if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
+                easi_base = ioremap(ecard_resource_start(ec, ECARD_RES_EASI),
+                                    ecard_resource_len(ec, ECARD_RES_EASI));
+                if (!easi_base) {
+                        ret = -ENOMEM;
+                        goto unmap_slot;
+                }
+
+                /*
+                 * Enable access to the EASI region.
+                 */
+                sel = 1 << 5;
+        }
+
+        writeb(sel, ioc_base);
+
+        ec->irq_data = state;
+        ec->ops = &pata_icside_ops_arcin_v6;
+
+        state->irq_port = easi_base;
+        state->ioc_base = ioc_base;
+        state->port[0].port_sel = sel;
+        state->port[1].port_sel = sel | 1;
+
+        /*
+         * Be on the safe side - disable interrupts
+         */
+        ec->ops->irqdisable(ec, ec->irq);
+
+        /*
+         * Find and register the interfaces.
+         */
+        pata_icside_add_port(ae, easi_base, &pata_icside_portinfo_v6_1);
+        pata_icside_add_port(ae, easi_base, &pata_icside_portinfo_v6_2);
+
+        /*
+         * FIXME: work around libata's aversion to calling port_disable.
+         * This permanently disables interrupts on port 0 - bad luck if
+         * you have a drive on that port.
+         */
+        state->port[0].disabled = 1;
+
+        return icside_dma_init(ae, ec);
+
+ unmap_slot:
+        iounmap(ioc_base);
+ out:
+        return ret;
+}
+
+static int __devinit
+pata_icside_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+        struct pata_icside_state *state;
+        struct ata_probe_ent ae;
+        void __iomem *idmem;
+        int ret;
+
+        ret = ecard_request_resources(ec);
+        if (ret)
+                goto out;
+
+        state = kzalloc(sizeof(struct pata_icside_state), GFP_KERNEL);
+        if (!state) {
+                ret = -ENOMEM;
+                goto release;
+        }
+
+        state->type = ICS_TYPE_NOTYPE;
+        state->dma = NO_DMA;
+
+        idmem = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
+                        ecard_resource_len(ec, ECARD_RES_IOCFAST));
+        if (idmem) {
+                unsigned int type;
+
+                type = readb(idmem + ICS_IDENT_OFFSET) & 1;
+                type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
+                type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
+                type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
+                iounmap(idmem);
+
+                state->type = type;
+        }
+
+        memset(&ae, 0, sizeof(ae));
+        INIT_LIST_HEAD(&ae.node);
+        ae.dev          = &ec->dev;
+        ae.port_ops     = &pata_icside_port_ops;
+        ae.sht          = &pata_icside_sht;
+        ae.pio_mask     = 0x1f;
+        ae.irq          = ec->irq;
+        ae.port_flags   = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
+        ae._host_flags  = ATA_HOST_SIMPLEX;
+        ae.private_data = state;
+
+        switch (state->type) {
+        case ICS_TYPE_A3IN:
+                dev_warn(&ec->dev, "A3IN unsupported\n");
+                ret = -ENODEV;
+                break;
+
+        case ICS_TYPE_A3USER:
+                dev_warn(&ec->dev, "A3USER unsupported\n");
+                ret = -ENODEV;
+                break;
+
+        case ICS_TYPE_V5:
+                ret = pata_icside_register_v5(&ae, ec);
+                break;
+
+        case ICS_TYPE_V6:
+                ret = pata_icside_register_v6(&ae, ec);
+                break;
+
+        default:
+                dev_warn(&ec->dev, "unknown interface type\n");
+                ret = -ENODEV;
+                break;
+        }
+
+        if (ret == 0)
+                ret = ata_device_add(&ae) == 0 ? -ENODEV : 0;
+
+        if (ret == 0)
+                goto out;
+
+        kfree(state);
+ release:
+        ecard_release_resources(ec);
+ out:
+        return ret;
+}
+
+static void pata_icside_shutdown(struct expansion_card *ec)
+{
+        struct ata_host *host = ecard_get_drvdata(ec);
+        unsigned long flags;
+
+        /*
+         * Disable interrupts from this card.  We need to do
+         * this before disabling EASI since we may be accessing
+         * this register via that region.
+         */
+        local_irq_save(flags);
+        if (ec->ops)
+                ec->ops->irqdisable(ec, ec->irq);
+        local_irq_restore(flags);
+
+        /*
+         * Reset the ROM pointer so that we can read the ROM
+         * after a soft reboot.  This also disables access to
+         * the IDE taskfile via the EASI region.
+         */
+        if (host) {
+                struct pata_icside_state *state = host->private_data;
+                if (state->ioc_base)
+                        writeb(0, state->ioc_base);
+        }
+}
+
+static void __devexit pata_icside_remove(struct expansion_card *ec)
+{
+        struct ata_host *host = ecard_get_drvdata(ec);
+        struct pata_icside_state *state = host->private_data;
+
+        ata_host_detach(host);
+
+        pata_icside_shutdown(ec);
+
+        /*
+         * don't NULL out the drvdata - devres/libata wants it
+         * to free the ata_host structure.
+         */
+        ec->ops = NULL;
+        ec->irq_data = NULL;
+
+        if (state->dma != NO_DMA)
+                free_dma(state->dma);
+        if (state->ioc_base)
+                iounmap(state->ioc_base);
+        if (state->ioc_base != state->irq_port)
+                iounmap(state->irq_port);
+
+        kfree(state);
+        ecard_release_resources(ec);
+}
+
+static const struct ecard_id pata_icside_ids[] = {
+        { MANU_ICS,  PROD_ICS_IDE  },
+        { MANU_ICS2, PROD_ICS2_IDE },
+        { 0xffff, 0xffff }
+};
+
+static struct ecard_driver pata_icside_driver = {
+        .probe          = pata_icside_probe,
+        .remove         = __devexit_p(pata_icside_remove),
+        .shutdown       = pata_icside_shutdown,
+        .id_table       = pata_icside_ids,
+        .drv = {
+                .name   = DRV_NAME,
+        },
+};
+
+static int __init pata_icside_init(void)
+{
+        return ecard_register_driver(&pata_icside_driver);
+}
+
+static void __exit pata_icside_exit(void)
+{
+        ecard_remove_driver(&pata_icside_driver);
+}
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ICS PATA driver");
+
+module_init(pata_icside_init);
+module_exit(pata_icside_exit);