icside.c

linux-2.6.15.6

	set_dma_sg(hwif->hw.dma, hwif->sg_table, hwif->sg_nents);
	set_dma_mode(hwif->hw.dma, dma_mode);

	drive->waiting_for_dma = 1;

	return 0;
}

static void icside_dma_exec_cmd(ide_drive_t *drive, u8 cmd)
{
	/* issue cmd to drive */
	ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD, NULL);
}

static int icside_dma_test_irq(ide_drive_t *drive)
{
	ide_hwif_t *hwif = HWIF(drive);
	struct icside_state *state = hwif->hwif_data;

	return readb(state->irq_port +
		     (hwif->channel ?
			ICS_ARCIN_V6_INTRSTAT_2 :
			ICS_ARCIN_V6_INTRSTAT_1)) & 1;
}

static int icside_dma_timeout(ide_drive_t *drive)
{
	printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);

	if (icside_dma_test_irq(drive))
		return 0;

	ide_dump_status(drive, "DMA timeout",
		HWIF(drive)->INB(IDE_STATUS_REG));

	return icside_dma_end(drive);
}

static int icside_dma_lostirq(ide_drive_t *drive)
{
	printk(KERN_ERR "%s: IRQ lost\n", drive->name);
	return 1;
}

static void icside_dma_init(ide_hwif_t *hwif)
{
	int autodma = 0;

#ifdef CONFIG_IDEDMA_ICS_AUTO
	autodma = 1;
#endif

	printk("    %s: SG-DMA", hwif->name);

	hwif->atapi_dma		= 1;
	hwif->mwdma_mask	= 7; /* MW0..2 */
	hwif->swdma_mask	= 7; /* SW0..2 */

	hwif->dmatable_cpu	= NULL;
	hwif->dmatable_dma	= 0;
	hwif->speedproc		= icside_set_speed;
	hwif->autodma		= autodma;

	hwif->ide_dma_check	= icside_dma_check;
	hwif->ide_dma_host_off	= icside_dma_host_off;
	hwif->ide_dma_off_quietly = icside_dma_off_quietly;
	hwif->ide_dma_host_on	= icside_dma_host_on;
	hwif->ide_dma_on	= icside_dma_on;
	hwif->dma_setup		= icside_dma_setup;
	hwif->dma_exec_cmd	= icside_dma_exec_cmd;
	hwif->dma_start		= icside_dma_start;
	hwif->ide_dma_end	= icside_dma_end;
	hwif->ide_dma_test_irq	= icside_dma_test_irq;
	hwif->ide_dma_timeout	= icside_dma_timeout;
	hwif->ide_dma_lostirq	= icside_dma_lostirq;

	hwif->drives[0].autodma = hwif->autodma;
	hwif->drives[1].autodma = hwif->autodma;

	printk(" capable%s\n", hwif->autodma ? ", auto-enable" : "");
}
#else
#define icside_dma_init(hwif)	(0)
#endif

static ide_hwif_t *icside_find_hwif(unsigned long dataport)
{
	ide_hwif_t *hwif;
	int index;

	for (index = 0; index < MAX_HWIFS; ++index) {
		hwif = &ide_hwifs[index];
		if (hwif->io_ports[IDE_DATA_OFFSET] == dataport)
			goto found;
	}

	for (index = 0; index < MAX_HWIFS; ++index) {
		hwif = &ide_hwifs[index];
		if (!hwif->io_ports[IDE_DATA_OFFSET])
			goto found;
	}

	hwif = NULL;
found:
	return hwif;
}

static ide_hwif_t *
icside_setup(void __iomem *base, struct cardinfo *info, struct expansion_card *ec)
{
	unsigned long port = (unsigned long)base + info->dataoffset;
	ide_hwif_t *hwif;

	hwif = icside_find_hwif(port);
	if (hwif) {
		int i;

		memset(&hwif->hw, 0, sizeof(hw_regs_t));

		/*
		 * Ensure we're using MMIO
		 */
		default_hwif_mmiops(hwif);
		hwif->mmio = 2;

		for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
			hwif->hw.io_ports[i] = port;
			hwif->io_ports[i] = port;
			port += 1 << info->stepping;
		}
		hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
		hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
		hwif->hw.irq  = ec->irq;
		hwif->irq     = ec->irq;
		hwif->noprobe = 0;
		hwif->chipset = ide_acorn;
		hwif->gendev.parent = &ec->dev;
	}

	return hwif;
}

static int __init
icside_register_v5(struct icside_state *state, struct expansion_card *ec)
{
	ide_hwif_t *hwif;
	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      = &icside_ops_arcin_v5;

	/*
	 * Be on the safe side - disable interrupts
	 */
	icside_irqdisable_arcin_v5(ec, 0);

	hwif = icside_setup(base, &icside_cardinfo_v5, ec);
	if (!hwif) {
		iounmap(base);
		return -ENODEV;
	}

	state->hwif[0] = hwif;

	probe_hwif_init(hwif);
	create_proc_ide_interfaces();

	return 0;
}

static int __init
icside_register_v6(struct icside_state *state, struct expansion_card *ec)
{
	ide_hwif_t *hwif, *mate;
	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           = &icside_ops_arcin_v6;

	state->irq_port   = easi_base;
	state->ioc_base   = ioc_base;

	/*
	 * Be on the safe side - disable interrupts
	 */
	icside_irqdisable_arcin_v6(ec, 0);

	/*
	 * Find and register the interfaces.
	 */
	hwif = icside_setup(easi_base, &icside_cardinfo_v6_1, ec);
	mate = icside_setup(easi_base, &icside_cardinfo_v6_2, ec);

	if (!hwif || !mate) {
		ret = -ENODEV;
		goto unmap_port;
	}

	state->hwif[0]    = hwif;
	state->hwif[1]    = mate;

	hwif->maskproc    = icside_maskproc;
	hwif->channel     = 0;
	hwif->hwif_data   = state;
	hwif->mate        = mate;
	hwif->serialized  = 1;
	hwif->config_data = (unsigned long)ioc_base;
	hwif->select_data = sel;
	hwif->hw.dma      = ec->dma;

	mate->maskproc    = icside_maskproc;
	mate->channel     = 1;
	mate->hwif_data   = state;
	mate->mate        = hwif;
	mate->serialized  = 1;
	mate->config_data = (unsigned long)ioc_base;
	mate->select_data = sel | 1;
	mate->hw.dma      = ec->dma;

	if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
		icside_dma_init(hwif);
		icside_dma_init(mate);
	}

	probe_hwif_init(hwif);
	probe_hwif_init(mate);
	create_proc_ide_interfaces();

	return 0;

 unmap_port:
	if (easi_base != ioc_base)
		iounmap(easi_base);
 unmap_slot:
	iounmap(ioc_base);
 out:
	return ret;
}

static int __devinit
icside_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct icside_state *state;
	void __iomem *idmem;
	int ret;

	ret = ecard_request_resources(ec);
	if (ret)
		goto out;

	state = kmalloc(sizeof(struct icside_state), GFP_KERNEL);
	if (!state) {
		ret = -ENOMEM;
		goto release;
	}

	memset(state, 0, sizeof(state));
	state->type	= ICS_TYPE_NOTYPE;
	state->dev	= &ec->dev;

	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;
	}

	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 = icside_register_v5(state, ec);
		break;

	case ICS_TYPE_V6:
		ret = icside_register_v6(state, ec);
		break;

	default:
		dev_warn(&ec->dev, "unknown interface type\n");
		ret = -ENODEV;
		break;
	}

	if (ret == 0) {
		ecard_set_drvdata(ec, state);
		goto out;
	}

	kfree(state);
 release:
	ecard_release_resources(ec);
 out:
	return ret;
}

static void __devexit icside_remove(struct expansion_card *ec)
{
	struct icside_state *state = ecard_get_drvdata(ec);

	switch (state->type) {
	case ICS_TYPE_V5:
		/* FIXME: tell IDE to stop using the interface */

		/* Disable interrupts */
		icside_irqdisable_arcin_v5(ec, 0);
		break;

	case ICS_TYPE_V6:
		/* FIXME: tell IDE to stop using the interface */
		if (ec->dma != NO_DMA)
			free_dma(ec->dma);

		/* Disable interrupts */
		icside_irqdisable_arcin_v6(ec, 0);

		/* Reset the ROM pointer/EASI selection */
		writeb(0, state->ioc_base);
		break;
	}

	ecard_set_drvdata(ec, NULL);
	ec->ops = NULL;
	ec->irq_data = NULL;

	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 void icside_shutdown(struct expansion_card *ec)
{
	struct icside_state *state = 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);
	ec->ops->irqdisable(ec, 0);
	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 (state->ioc_base)
		writeb(0, state->ioc_base);
}

static const struct ecard_id icside_ids[] = {
	{ MANU_ICS,  PROD_ICS_IDE  },
	{ MANU_ICS2, PROD_ICS2_IDE },
	{ 0xffff, 0xffff }
};

static struct ecard_driver icside_driver = {
	.probe		= icside_probe,
	.remove		= __devexit_p(icside_remove),
	.shutdown	= icside_shutdown,
	.id_table	= icside_ids,
	.drv = {
		.name	= "icside",
	},
};

static int __init icside_init(void)
{
	return ecard_register_driver(&icside_driver);
}

MODULE_AUTHOR("Russell King <[e-mail]>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ICS IDE driver");

module_init(icside_init);