Merge commit 'v2.6.28-rc2' into x86/uv

1 files changed, 703 insertions, 0 deletions

diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
new file mode 100644
index 00000000000..2d848010499
--- /dev/null
+++ b/drivers/ide/icside.c
@@ -0,0 +1,703 @@
+/*
+ * Copyright (c) 1996-2004 Russell King.
+ *
+ * Please note that this platform does not support 32-bit IDE IO.
+ */
+
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/errno.h>
+#include <linux/ide.h>
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/scatterlist.h>
+#include <linux/io.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+
+#define DRV_NAME "icside"
+
+#define ICS_IDENT_OFFSET		0x2280
+
+#define ICS_ARCIN_V5_INTRSTAT		0x0000
+#define ICS_ARCIN_V5_INTROFFSET		0x0004
+#define ICS_ARCIN_V5_IDEOFFSET		0x2800
+#define ICS_ARCIN_V5_IDEALTOFFSET	0x2b80
+#define ICS_ARCIN_V5_IDESTEPPING	6
+
+#define ICS_ARCIN_V6_IDEOFFSET_1	0x2000
+#define ICS_ARCIN_V6_INTROFFSET_1	0x2200
+#define ICS_ARCIN_V6_INTRSTAT_1		0x2290
+#define ICS_ARCIN_V6_IDEALTOFFSET_1	0x2380
+#define ICS_ARCIN_V6_IDEOFFSET_2	0x3000
+#define ICS_ARCIN_V6_INTROFFSET_2	0x3200
+#define ICS_ARCIN_V6_INTRSTAT_2		0x3290
+#define ICS_ARCIN_V6_IDEALTOFFSET_2	0x3380
+#define ICS_ARCIN_V6_IDESTEPPING	6
+
+struct cardinfo {
+	unsigned int dataoffset;
+	unsigned int ctrloffset;
+	unsigned int stepping;
+};
+
+static struct cardinfo icside_cardinfo_v5 = {
+	.dataoffset	= ICS_ARCIN_V5_IDEOFFSET,
+	.ctrloffset	= ICS_ARCIN_V5_IDEALTOFFSET,
+	.stepping	= ICS_ARCIN_V5_IDESTEPPING,
+};
+
+static struct cardinfo icside_cardinfo_v6_1 = {
+	.dataoffset	= ICS_ARCIN_V6_IDEOFFSET_1,
+	.ctrloffset	= ICS_ARCIN_V6_IDEALTOFFSET_1,
+	.stepping	= ICS_ARCIN_V6_IDESTEPPING,
+};
+
+static struct cardinfo icside_cardinfo_v6_2 = {
+	.dataoffset	= ICS_ARCIN_V6_IDEOFFSET_2,
+	.ctrloffset	= ICS_ARCIN_V6_IDEALTOFFSET_2,
+	.stepping	= ICS_ARCIN_V6_IDESTEPPING,
+};
+
+struct icside_state {
+	unsigned int channel;
+	unsigned int enabled;
+	void __iomem *irq_port;
+	void __iomem *ioc_base;
+	unsigned int sel;
+	unsigned int type;
+	struct ide_host *host;
+};
+
+#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: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+
+	writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+/* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+
+	readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+static const expansioncard_ops_t icside_ops_arcin_v5 = {
+	.irqenable	= icside_irqenable_arcin_v5,
+	.irqdisable	= icside_irqdisable_arcin_v5,
+};
+
+
+/* ---------------- Version 6 PCB Support Functions --------------------- */
+/* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+	void __iomem *base = state->irq_port;
+
+	state->enabled = 1;
+
+	switch (state->channel) {
+	case 0:
+		writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
+		readb(base + ICS_ARCIN_V6_INTROFFSET_2);
+		break;
+	case 1:
+		writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
+		readb(base + ICS_ARCIN_V6_INTROFFSET_1);
+		break;
+	}
+}
+
+/* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+
+	state->enabled = 0;
+
+	readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+	readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+}
+
+/* Prototype: icside_irqprobe(struct expansion_card *ec)
+ * Purpose  : detect an active interrupt from card
+ */
+static int icside_irqpending_arcin_v6(struct expansion_card *ec)
+{
+	struct 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 icside_ops_arcin_v6 = {
+	.irqenable	= icside_irqenable_arcin_v6,
+	.irqdisable	= icside_irqdisable_arcin_v6,
+	.irqpending	= icside_irqpending_arcin_v6,
+};
+
+/*
+ * Handle routing of interrupts.  This is called before
+ * we write the command to the drive.
+ */
+static void icside_maskproc(ide_drive_t *drive, int mask)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+	struct icside_state *state = ecard_get_drvdata(ec);
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	state->channel = hwif->channel;
+
+	if (state->enabled && !mask) {
+		switch (hwif->channel) {
+		case 0:
+			writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+			readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+			break;
+		case 1:
+			writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+			readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+			break;
+		}
+	} else {
+		readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+		readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+	}
+
+	local_irq_restore(flags);
+}
+
+static const struct ide_port_ops icside_v6_no_dma_port_ops = {
+	.maskproc		= icside_maskproc,
+};
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_ICS
+/*
+ * 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		250		437
+ *	C	125 (125)	125 (375)	250 (500)
+ *	D	62		125		187
+ *
+ * (figures in brackets are actual measured timings)
+ *
+ * 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 icside_set_dma_mode(ide_drive_t *drive, const u8 xfer_mode)
+{
+	int cycle_time, use_dma_info = 0;
+
+	switch (xfer_mode) {
+	case XFER_MW_DMA_2:
+		cycle_time = 250;
+		use_dma_info = 1;
+		break;
+
+	case XFER_MW_DMA_1:
+		cycle_time = 250;
+		use_dma_info = 1;
+		break;
+
+	case XFER_MW_DMA_0:
+		cycle_time = 480;
+		break;
+
+	case XFER_SW_DMA_2:
+	case XFER_SW_DMA_1:
+	case XFER_SW_DMA_0:
+		cycle_time = 480;
+		break;
+	}
+
+	/*
+	 * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
+	 * take care to note the values in the ID...
+	 */
+	if (use_dma_info && drive->id[ATA_ID_EIDE_DMA_TIME] > cycle_time)
+		cycle_time = drive->id[ATA_ID_EIDE_DMA_TIME];
+
+	drive->drive_data = cycle_time;
+
+	printk("%s: %s selected (peak %dMB/s)\n", drive->name,
+		ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
+}
+
+static const struct ide_port_ops icside_v6_port_ops = {
+	.set_dma_mode		= icside_set_dma_mode,
+	.maskproc		= icside_maskproc,
+};
+
+static void icside_dma_host_set(ide_drive_t *drive, int on)
+{
+}
+
+static int icside_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+
+	drive->waiting_for_dma = 0;
+
+	disable_dma(ec->dma);
+
+	/* Teardown mappings after DMA has completed. */
+	ide_destroy_dmatable(drive);
+
+	return get_dma_residue(ec->dma) != 0;
+}
+
+static void icside_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+
+	/* We can not enable DMA on both channels simultaneously. */
+	BUG_ON(dma_channel_active(ec->dma));
+	enable_dma(ec->dma);
+}
+
+static int icside_dma_setup(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+	struct icside_state *state = ecard_get_drvdata(ec);
+	struct request *rq = hwif->hwgroup->rq;
+	unsigned int dma_mode;
+
+	if (rq_data_dir(rq))
+		dma_mode = DMA_MODE_WRITE;
+	else
+		dma_mode = DMA_MODE_READ;
+
+	/*
+	 * We can not enable DMA on both channels.
+	 */
+	BUG_ON(dma_channel_active(ec->dma));
+
+	hwif->sg_nents = ide_build_sglist(drive, rq);
+
+	/*
+	 * Ensure that we have the right interrupt routed.
+	 */
+	icside_maskproc(drive, 0);
+
+	/*
+	 * Route the DMA signals to the correct interface.
+	 */
+	writeb(state->sel | hwif->channel, state->ioc_base);
+
+	/*
+	 * Select the correct timing for this drive.
+	 */
+	set_dma_speed(ec->dma, drive->drive_data);
+
+	/*
+	 * Tell the DMA engine about the SG table and
+	 * data direction.
+	 */
+	set_dma_sg(ec->dma, hwif->sg_table, hwif->sg_nents);
+	set_dma_mode(ec->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 expansion_card *ec = ECARD_DEV(hwif->dev);
+	struct icside_state *state = ecard_get_drvdata(ec);
+
+	return readb(state->irq_port +
+		     (hwif->channel ?
+			ICS_ARCIN_V6_INTRSTAT_2 :
+			ICS_ARCIN_V6_INTRSTAT_1)) & 1;
+}
+
+static int icside_dma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	hwif->dmatable_cpu	= NULL;
+	hwif->dmatable_dma	= 0;
+
+	return 0;
+}
+
+static const struct ide_dma_ops icside_v6_dma_ops = {
+	.dma_host_set		= icside_dma_host_set,
+	.dma_setup		= icside_dma_setup,
+	.dma_exec_cmd		= icside_dma_exec_cmd,
+	.dma_start		= icside_dma_start,
+	.dma_end		= icside_dma_end,
+	.dma_test_irq		= icside_dma_test_irq,
+	.dma_timeout		= ide_dma_timeout,
+	.dma_lost_irq		= ide_dma_lost_irq,
+};
+#else
+#define icside_v6_dma_ops NULL
+#endif
+
+static int icside_dma_off_init(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	return -EOPNOTSUPP;
+}
+
+static void icside_setup_ports(hw_regs_t *hw, void __iomem *base,
+			       struct cardinfo *info, struct expansion_card *ec)
+{
+	unsigned long port = (unsigned long)base + info->dataoffset;
+
+	hw->io_ports.data_addr	 = port;
+	hw->io_ports.error_addr	 = port + (1 << info->stepping);
+	hw->io_ports.nsect_addr	 = port + (2 << info->stepping);
+	hw->io_ports.lbal_addr	 = port + (3 << info->stepping);
+	hw->io_ports.lbam_addr	 = port + (4 << info->stepping);
+	hw->io_ports.lbah_addr	 = port + (5 << info->stepping);
+	hw->io_ports.device_addr = port + (6 << info->stepping);
+	hw->io_ports.status_addr = port + (7 << info->stepping);
+	hw->io_ports.ctl_addr	 = (unsigned long)base + info->ctrloffset;
+
+	hw->irq = ec->irq;
+	hw->dev = &ec->dev;
+	hw->chipset = ide_acorn;
+}
+
+static int __init
+icside_register_v5(struct icside_state *state, struct expansion_card *ec)
+{
+	void __iomem *base;
+	struct ide_host *host;
+	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+	int ret;
+
+	base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+	if (!base)
+		return -ENOMEM;
+
+	state->irq_port = base;
+
+	ec->irqaddr  = base + ICS_ARCIN_V5_INTRSTAT;
+	ec->irqmask  = 1;
+
+	ecard_setirq(ec, &icside_ops_arcin_v5, state);
+
+	/*
+	 * Be on the safe side - disable interrupts
+	 */
+	icside_irqdisable_arcin_v5(ec, 0);
+
+	icside_setup_ports(&hw, base, &icside_cardinfo_v5, ec);
+
+	host = ide_host_alloc(NULL, hws);
+	if (host == NULL)
+		return -ENODEV;
+
+	state->host = host;
+
+	ecard_set_drvdata(ec, state);
+
+	ret = ide_host_register(host, NULL, hws);
+	if (ret)
+		goto err_free;
+
+	return 0;
+err_free:
+	ide_host_free(host);
+	ecard_set_drvdata(ec, NULL);
+	return ret;
+}
+
+static const struct ide_port_info icside_v6_port_info __initdata = {
+	.init_dma		= icside_dma_off_init,
+	.port_ops		= &icside_v6_no_dma_port_ops,
+	.dma_ops		= &icside_v6_dma_ops,
+	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_MMIO,
+	.mwdma_mask		= ATA_MWDMA2,
+	.swdma_mask		= ATA_SWDMA2,
+};
+
+static int __init
+icside_register_v6(struct icside_state *state, struct expansion_card *ec)
+{
+	void __iomem *ioc_base, *easi_base;
+	struct ide_host *host;
+	unsigned int sel = 0;
+	int ret;
+	hw_regs_t hw[2], *hws[] = { &hw[0], NULL, NULL, NULL };
+	struct ide_port_info d = icside_v6_port_info;
+
+	ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+	if (!ioc_base) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	easi_base = ioc_base;
+
+	if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
+		easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
+		if (!easi_base) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		/*
+		 * Enable access to the EASI region.
+		 */
+		sel = 1 << 5;
+	}
+
+	writeb(sel, ioc_base);
+
+	ecard_setirq(ec, &icside_ops_arcin_v6, state);
+
+	state->irq_port   = easi_base;
+	state->ioc_base   = ioc_base;
+	state->sel	  = sel;
+
+	/*
+	 * Be on the safe side - disable interrupts
+	 */
+	icside_irqdisable_arcin_v6(ec, 0);
+
+	icside_setup_ports(&hw[0], easi_base, &icside_cardinfo_v6_1, ec);
+	icside_setup_ports(&hw[1], easi_base, &icside_cardinfo_v6_2, ec);
+
+	host = ide_host_alloc(&d, hws);
+	if (host == NULL)
+		return -ENODEV;
+
+	state->host = host;
+
+	ecard_set_drvdata(ec, state);
+
+	if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
+		d.init_dma = icside_dma_init;
+		d.port_ops = &icside_v6_port_ops;
+		d.dma_ops = NULL;
+	}
+
+	ret = ide_host_register(host, NULL, hws);
+	if (ret)
+		goto err_free;
+
+	return 0;
+err_free:
+	ide_host_free(host);
+	if (d.dma_ops)
+		free_dma(ec->dma);
+	ecard_set_drvdata(ec, NULL);
+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 = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
+	if (!state) {
+		ret = -ENOMEM;
+		goto release;
+	}
+
+	state->type	= ICS_TYPE_NOTYPE;
+
+	idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+	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;
+		ecardm_iounmap(ec, 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)
+		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);
+
+	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);
+}
+
+static void __exit icside_exit(void)
+{
+	ecard_remove_driver(&icside_driver);
+}
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ICS IDE driver");
+
+module_init(icside_init);
+module_exit(icside_exit);