[linux-2.6-block.git] / drivers / ata / pata_mpc52xx.c

/*
 * drivers/ata/pata_mpc52xx.c
 *
 * libata driver for the Freescale MPC52xx on-chip IDE interface
 *
 * Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
 * Copyright (C) 2003 Mipsys - Benjamin Herrenschmidt
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/libata.h>

#include <asm/types.h>
#include <asm/prom.h>
#include <asm/of_platform.h>
#include <asm/mpc52xx.h>


#define DRV_NAME	"mpc52xx_ata"
#define DRV_VERSION	"0.1.2"


/* Private structures used by the driver */
struct mpc52xx_ata_timings {
	u32	pio1;
	u32	pio2;
};

struct mpc52xx_ata_priv {
	unsigned int			ipb_period;
	struct mpc52xx_ata __iomem *	ata_regs;
	int				ata_irq;
	struct mpc52xx_ata_timings	timings[2];
	int				csel;
};


/* ATAPI-4 PIO specs (in ns) */
static const int ataspec_t0[5]    = {600, 383, 240, 180, 120};
static const int ataspec_t1[5]    = { 70,  50,  30,  30,  25};
static const int ataspec_t2_8[5]  = {290, 290, 290,  80,  70};
static const int ataspec_t2_16[5] = {165, 125, 100,  80,  70};
static const int ataspec_t2i[5]   = {  0,   0,   0,  70,  25};
static const int ataspec_t4[5]    = { 30,  20,  15,  10,  10};
static const int ataspec_ta[5]    = { 35,  35,  35,  35,  35};

#define CALC_CLKCYC(c,v) ((((v)+(c)-1)/(c)))


/* Bit definitions inside the registers */
#define MPC52xx_ATA_HOSTCONF_SMR	0x80000000UL /* State machine reset */
#define MPC52xx_ATA_HOSTCONF_FR		0x40000000UL /* FIFO Reset */
#define MPC52xx_ATA_HOSTCONF_IE		0x02000000UL /* Enable interrupt in PIO */
#define MPC52xx_ATA_HOSTCONF_IORDY	0x01000000UL /* Drive supports IORDY protocol */

#define MPC52xx_ATA_HOSTSTAT_TIP	0x80000000UL /* Transaction in progress */
#define MPC52xx_ATA_HOSTSTAT_UREP	0x40000000UL /* UDMA Read Extended Pause */
#define MPC52xx_ATA_HOSTSTAT_RERR	0x02000000UL /* Read Error */
#define MPC52xx_ATA_HOSTSTAT_WERR	0x01000000UL /* Write Error */

#define MPC52xx_ATA_FIFOSTAT_EMPTY	0x01 /* FIFO Empty */

#define MPC52xx_ATA_DMAMODE_WRITE	0x01 /* Write DMA */
#define MPC52xx_ATA_DMAMODE_READ	0x02 /* Read DMA */
#define MPC52xx_ATA_DMAMODE_UDMA	0x04 /* UDMA enabled */
#define MPC52xx_ATA_DMAMODE_IE		0x08 /* Enable drive interrupt to CPU in DMA mode */
#define MPC52xx_ATA_DMAMODE_FE		0x10 /* FIFO Flush enable in Rx mode */
#define MPC52xx_ATA_DMAMODE_FR		0x20 /* FIFO Reset */
#define MPC52xx_ATA_DMAMODE_HUT		0x40 /* Host UDMA burst terminate */


/* Structure of the hardware registers */
struct mpc52xx_ata {

	/* Host interface registers */
	u32 config;		/* ATA + 0x00 Host configuration */
	u32 host_status;	/* ATA + 0x04 Host controller status */
	u32 pio1;		/* ATA + 0x08 PIO Timing 1 */
	u32 pio2;		/* ATA + 0x0c PIO Timing 2 */
	u32 mdma1;		/* ATA + 0x10 MDMA Timing 1 */
	u32 mdma2;		/* ATA + 0x14 MDMA Timing 2 */
	u32 udma1;		/* ATA + 0x18 UDMA Timing 1 */
	u32 udma2;		/* ATA + 0x1c UDMA Timing 2 */
	u32 udma3;		/* ATA + 0x20 UDMA Timing 3 */
	u32 udma4;		/* ATA + 0x24 UDMA Timing 4 */
	u32 udma5;		/* ATA + 0x28 UDMA Timing 5 */
	u32 share_cnt;		/* ATA + 0x2c ATA share counter */
	u32 reserved0[3];

	/* FIFO registers */
	u32 fifo_data;		/* ATA + 0x3c */
	u8  fifo_status_frame;	/* ATA + 0x40 */
	u8  fifo_status;	/* ATA + 0x41 */
	u16 reserved7[1];
	u8  fifo_control;	/* ATA + 0x44 */
	u8  reserved8[5];
	u16 fifo_alarm;		/* ATA + 0x4a */
	u16 reserved9;
	u16 fifo_rdp;		/* ATA + 0x4e */
	u16 reserved10;
	u16 fifo_wrp;		/* ATA + 0x52 */
	u16 reserved11;
	u16 fifo_lfrdp;		/* ATA + 0x56 */
	u16 reserved12;
	u16 fifo_lfwrp;		/* ATA + 0x5a */

	/* Drive TaskFile registers */
	u8  tf_control;		/* ATA + 0x5c TASKFILE Control/Alt Status */
	u8  reserved13[3];
	u16 tf_data;		/* ATA + 0x60 TASKFILE Data */
	u16 reserved14;
	u8  tf_features;	/* ATA + 0x64 TASKFILE Features/Error */
	u8  reserved15[3];
	u8  tf_sec_count;	/* ATA + 0x68 TASKFILE Sector Count */
	u8  reserved16[3];
	u8  tf_sec_num;		/* ATA + 0x6c TASKFILE Sector Number */
	u8  reserved17[3];
	u8  tf_cyl_low;		/* ATA + 0x70 TASKFILE Cylinder Low */
	u8  reserved18[3];
	u8  tf_cyl_high;	/* ATA + 0x74 TASKFILE Cylinder High */
	u8  reserved19[3];
	u8  tf_dev_head;	/* ATA + 0x78 TASKFILE Device/Head */
	u8  reserved20[3];
	u8  tf_command;		/* ATA + 0x7c TASKFILE Command/Status */
	u8  dma_mode;		/* ATA + 0x7d ATA Host DMA Mode configuration */
	u8  reserved21[2];
};


/* ======================================================================== */
/* Aux fns                                                                  */
/* ======================================================================== */


/* MPC52xx low level hw control */

static int
mpc52xx_ata_compute_pio_timings(struct mpc52xx_ata_priv *priv, int dev, int pio)
{
	struct mpc52xx_ata_timings *timing = &priv->timings[dev];
	unsigned int ipb_period = priv->ipb_period;
	unsigned int t0, t1, t2_8, t2_16, t2i, t4, ta;

	if ((pio<0) || (pio>4))
		return -EINVAL;

	t0	= CALC_CLKCYC(ipb_period, 1000 * ataspec_t0[pio]);
	t1	= CALC_CLKCYC(ipb_period, 1000 * ataspec_t1[pio]);
	t2_8	= CALC_CLKCYC(ipb_period, 1000 * ataspec_t2_8[pio]);
	t2_16	= CALC_CLKCYC(ipb_period, 1000 * ataspec_t2_16[pio]);
	t2i	= CALC_CLKCYC(ipb_period, 1000 * ataspec_t2i[pio]);
	t4	= CALC_CLKCYC(ipb_period, 1000 * ataspec_t4[pio]);
	ta	= CALC_CLKCYC(ipb_period, 1000 * ataspec_ta[pio]);

	timing->pio1 = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8) | (t2i);
	timing->pio2 = (t4 << 24) | (t1 << 16) | (ta << 8);

	return 0;
}

static void
mpc52xx_ata_apply_timings(struct mpc52xx_ata_priv *priv, int device)
{
	struct mpc52xx_ata __iomem *regs = priv->ata_regs;
	struct mpc52xx_ata_timings *timing = &priv->timings[device];

	out_be32(&regs->pio1,  timing->pio1);
	out_be32(&regs->pio2,  timing->pio2);
	out_be32(&regs->mdma1, 0);
	out_be32(&regs->mdma2, 0);
	out_be32(&regs->udma1, 0);
	out_be32(&regs->udma2, 0);
	out_be32(&regs->udma3, 0);
	out_be32(&regs->udma4, 0);
	out_be32(&regs->udma5, 0);

	priv->csel = device;
}

static int
mpc52xx_ata_hw_init(struct mpc52xx_ata_priv *priv)
{
	struct mpc52xx_ata __iomem *regs = priv->ata_regs;
	int tslot;

	/* Clear share_cnt (all sample code do this ...) */
	out_be32(&regs->share_cnt, 0);

	/* Configure and reset host */
	out_be32(&regs->config,
			MPC52xx_ATA_HOSTCONF_IE |
			MPC52xx_ATA_HOSTCONF_IORDY |
			MPC52xx_ATA_HOSTCONF_SMR |
			MPC52xx_ATA_HOSTCONF_FR);

	udelay(10);

	out_be32(&regs->config,
			MPC52xx_ATA_HOSTCONF_IE |
			MPC52xx_ATA_HOSTCONF_IORDY);

	/* Set the time slot to 1us */
	tslot = CALC_CLKCYC(priv->ipb_period, 1000000);
	out_be32(&regs->share_cnt, tslot << 16 );

	/* Init timings to PIO0 */
	memset(priv->timings, 0x00, 2*sizeof(struct mpc52xx_ata_timings));

	mpc52xx_ata_compute_pio_timings(priv, 0, 0);
	mpc52xx_ata_compute_pio_timings(priv, 1, 0);

	mpc52xx_ata_apply_timings(priv, 0);

	return 0;
}


/* ======================================================================== */
/* libata driver                                                            */
/* ======================================================================== */

static void
mpc52xx_ata_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	struct mpc52xx_ata_priv *priv = ap->host->private_data;
	int pio, rv;

	pio = adev->pio_mode - XFER_PIO_0;

	rv = mpc52xx_ata_compute_pio_timings(priv, adev->devno, pio);

	if (rv) {
		printk(KERN_ERR DRV_NAME
			": Trying to select invalid PIO mode %d\n", pio);
		return;
	}

	mpc52xx_ata_apply_timings(priv, adev->devno);
}
static void
mpc52xx_ata_dev_select(struct ata_port *ap, unsigned int device)
{
	struct mpc52xx_ata_priv *priv = ap->host->private_data;

	if (device != priv->csel)
		mpc52xx_ata_apply_timings(priv, device);

	ata_sff_dev_select(ap,device);
}

static struct scsi_host_template mpc52xx_ata_sht = {
	ATA_PIO_SHT(DRV_NAME),
};

static struct ata_port_operations mpc52xx_ata_port_ops = {
	.inherits		= &ata_sff_port_ops,
	.sff_dev_select		= mpc52xx_ata_dev_select,
	.cable_detect		= ata_cable_40wire,
	.set_piomode		= mpc52xx_ata_set_piomode,
	.post_internal_cmd	= ATA_OP_NULL,
};

static int __devinit
mpc52xx_ata_init_one(struct device *dev, struct mpc52xx_ata_priv *priv,
		     unsigned long raw_ata_regs)
{
	struct ata_host *host;
	struct ata_port *ap;
	struct ata_ioports *aio;

	host = ata_host_alloc(dev, 1);
	if (!host)
		return -ENOMEM;

	ap = host->ports[0];
	ap->flags		|= ATA_FLAG_SLAVE_POSS;
	ap->pio_mask		= 0x1f;	/* Up to PIO4 */
	ap->mwdma_mask		= 0x00;	/* No MWDMA   */
	ap->udma_mask		= 0x00;	/* No UDMA    */
	ap->ops			= &mpc52xx_ata_port_ops;
	host->private_data	= priv;

	aio = &ap->ioaddr;
	aio->cmd_addr		= NULL;	/* Don't have a classic reg block */
	aio->altstatus_addr	= &priv->ata_regs->tf_control;
	aio->ctl_addr		= &priv->ata_regs->tf_control;
	aio->data_addr		= &priv->ata_regs->tf_data;
	aio->error_addr		= &priv->ata_regs->tf_features;
	aio->feature_addr	= &priv->ata_regs->tf_features;
	aio->nsect_addr		= &priv->ata_regs->tf_sec_count;
	aio->lbal_addr		= &priv->ata_regs->tf_sec_num;
	aio->lbam_addr		= &priv->ata_regs->tf_cyl_low;
	aio->lbah_addr		= &priv->ata_regs->tf_cyl_high;
	aio->device_addr	= &priv->ata_regs->tf_dev_head;
	aio->status_addr	= &priv->ata_regs->tf_command;
	aio->command_addr	= &priv->ata_regs->tf_command;

	ata_port_desc(ap, "ata_regs 0x%lx", raw_ata_regs);

	/* activate host */
	return ata_host_activate(host, priv->ata_irq, ata_sff_interrupt, 0,
				 &mpc52xx_ata_sht);
}

static struct mpc52xx_ata_priv *
mpc52xx_ata_remove_one(struct device *dev)
{
	struct ata_host *host = dev_get_drvdata(dev);
	struct mpc52xx_ata_priv *priv = host->private_data;

	ata_host_detach(host);

	return priv;
}


/* ======================================================================== */
/* OF Platform driver                                                       */
/* ======================================================================== */

static int __devinit
mpc52xx_ata_probe(struct of_device *op, const struct of_device_id *match)
{
	unsigned int ipb_freq;
	struct resource res_mem;
	int ata_irq;
	struct mpc52xx_ata __iomem *ata_regs;
	struct mpc52xx_ata_priv *priv;
	int rv;

	/* Get ipb frequency */
	ipb_freq = mpc52xx_find_ipb_freq(op->node);
	if (!ipb_freq) {
		printk(KERN_ERR DRV_NAME ": "
			"Unable to find IPB Bus frequency\n" );
		return -ENODEV;
	}

	/* Get IRQ and register */
	rv = of_address_to_resource(op->node, 0, &res_mem);
	if (rv) {
		printk(KERN_ERR DRV_NAME ": "
			"Error while parsing device node resource\n" );
		return rv;
	}

	ata_irq = irq_of_parse_and_map(op->node, 0);
	if (ata_irq == NO_IRQ) {
		printk(KERN_ERR DRV_NAME ": "
			"Error while mapping the irq\n");
		return -EINVAL;
	}

	/* Request mem region */
	if (!devm_request_mem_region(&op->dev, res_mem.start,
				     sizeof(struct mpc52xx_ata), DRV_NAME)) {
		printk(KERN_ERR DRV_NAME ": "
			"Error while requesting mem region\n");
		rv = -EBUSY;
		goto err;
	}

	/* Remap registers */
	ata_regs = devm_ioremap(&op->dev, res_mem.start,
				sizeof(struct mpc52xx_ata));
	if (!ata_regs) {
		printk(KERN_ERR DRV_NAME ": "
			"Error while mapping register set\n");
		rv = -ENOMEM;
		goto err;
	}

	/* Prepare our private structure */
	priv = devm_kzalloc(&op->dev, sizeof(struct mpc52xx_ata_priv),
			    GFP_ATOMIC);
	if (!priv) {
		printk(KERN_ERR DRV_NAME ": "
			"Error while allocating private structure\n");
		rv = -ENOMEM;
		goto err;
	}

	priv->ipb_period = 1000000000 / (ipb_freq / 1000);
	priv->ata_regs = ata_regs;
	priv->ata_irq = ata_irq;
	priv->csel = -1;

	/* Init the hw */
	rv = mpc52xx_ata_hw_init(priv);
	if (rv) {
		printk(KERN_ERR DRV_NAME ": Error during HW init\n");
		goto err;
	}

	/* Register ourselves to libata */
	rv = mpc52xx_ata_init_one(&op->dev, priv, res_mem.start);
	if (rv) {
		printk(KERN_ERR DRV_NAME ": "
			"Error while registering to ATA layer\n");
		return rv;
	}

	/* Done */
	return 0;

	/* Error path */
err:
	irq_dispose_mapping(ata_irq);
	return rv;
}

static int
mpc52xx_ata_remove(struct of_device *op)
{
	struct mpc52xx_ata_priv *priv;

	priv = mpc52xx_ata_remove_one(&op->dev);
	irq_dispose_mapping(priv->ata_irq);

	return 0;
}


#ifdef CONFIG_PM

static int
mpc52xx_ata_suspend(struct of_device *op, pm_message_t state)
{
	struct ata_host *host = dev_get_drvdata(&op->dev);

	return ata_host_suspend(host, state);
}

static int
mpc52xx_ata_resume(struct of_device *op)
{
	struct ata_host *host = dev_get_drvdata(&op->dev);
	struct mpc52xx_ata_priv *priv = host->private_data;
	int rv;

	rv = mpc52xx_ata_hw_init(priv);
	if (rv) {
		printk(KERN_ERR DRV_NAME ": Error during HW init\n");
		return rv;
	}

	ata_host_resume(host);

	return 0;
}

#endif


static struct of_device_id mpc52xx_ata_of_match[] = {
	{ .compatible = "fsl,mpc5200-ata", },
	{ .compatible = "mpc5200-ata", },
	{},
};


static struct of_platform_driver mpc52xx_ata_of_platform_driver = {
	.owner		= THIS_MODULE,
	.name		= DRV_NAME,
	.match_table	= mpc52xx_ata_of_match,
	.probe		= mpc52xx_ata_probe,
	.remove		= mpc52xx_ata_remove,
#ifdef CONFIG_PM
	.suspend	= mpc52xx_ata_suspend,
	.resume		= mpc52xx_ata_resume,
#endif
	.driver		= {
		.name	= DRV_NAME,
		.owner	= THIS_MODULE,
	},
};


/* ======================================================================== */
/* Module                                                                   */
/* ======================================================================== */

static int __init
mpc52xx_ata_init(void)
{
	printk(KERN_INFO "ata: MPC52xx IDE/ATA libata driver\n");
	return of_register_platform_driver(&mpc52xx_ata_of_platform_driver);
}

static void __exit
mpc52xx_ata_exit(void)
{
	of_unregister_platform_driver(&mpc52xx_ata_of_platform_driver);
}

module_init(mpc52xx_ata_init);
module_exit(mpc52xx_ata_exit);

MODULE_AUTHOR("Sylvain Munaut <tnt@246tNt.com>");
MODULE_DESCRIPTION("Freescale MPC52xx IDE/ATA libata driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(of, mpc52xx_ata_of_match);
MODULE_VERSION(DRV_VERSION);
Commit	Line	Data
155d2916 SM	1	/*
	2	* drivers/ata/pata_mpc52xx.c
	3	*
	4	* libata driver for the Freescale MPC52xx on-chip IDE interface
	5	*
	6	* Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
	7	* Copyright (C) 2003 Mipsys - Benjamin Herrenschmidt
	8	*
	9	* This file is licensed under the terms of the GNU General Public License
	10	* version 2. This program is licensed "as is" without any warranty of any
	11	* kind, whether express or implied.
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/slab.h>
	17	#include <linux/delay.h>
	18	#include <linux/libata.h>
	19
155d2916 SM	20	#include <asm/types.h>
	21	#include <asm/prom.h>
	22	#include <asm/of_platform.h>
	23	#include <asm/mpc52xx.h>
	24
	25
	26	#define DRV_NAME "mpc52xx_ata"
2a3103ce	27	#define DRV_VERSION "0.1.2"
155d2916 SM	28
	29
	30	/* Private structures used by the driver */
	31	struct mpc52xx_ata_timings {
	32	u32 pio1;
	33	u32 pio2;
	34	};
	35
	36	struct mpc52xx_ata_priv {
	37	unsigned int ipb_period;
	38	struct mpc52xx_ata __iomem * ata_regs;
	39	int ata_irq;
	40	struct mpc52xx_ata_timings timings[2];
	41	int csel;
	42	};
	43
	44
	45	/* ATAPI-4 PIO specs (in ns) */
	46	static const int ataspec_t0[5] = {600, 383, 240, 180, 120};
	47	static const int ataspec_t1[5] = { 70, 50, 30, 30, 25};
	48	static const int ataspec_t2_8[5] = {290, 290, 290, 80, 70};
	49	static const int ataspec_t2_16[5] = {165, 125, 100, 80, 70};
	50	static const int ataspec_t2i[5] = { 0, 0, 0, 70, 25};
	51	static const int ataspec_t4[5] = { 30, 20, 15, 10, 10};
	52	static const int ataspec_ta[5] = { 35, 35, 35, 35, 35};
	53
	54	#define CALC_CLKCYC(c,v) ((((v)+(c)-1)/(c)))
	55
	56
	57	/* Bit definitions inside the registers */
	58	#define MPC52xx_ATA_HOSTCONF_SMR 0x80000000UL /* State machine reset */
	59	#define MPC52xx_ATA_HOSTCONF_FR 0x40000000UL /* FIFO Reset */
	60	#define MPC52xx_ATA_HOSTCONF_IE 0x02000000UL /* Enable interrupt in PIO */
	61	#define MPC52xx_ATA_HOSTCONF_IORDY 0x01000000UL /* Drive supports IORDY protocol */
	62
	63	#define MPC52xx_ATA_HOSTSTAT_TIP 0x80000000UL /* Transaction in progress */
	64	#define MPC52xx_ATA_HOSTSTAT_UREP 0x40000000UL /* UDMA Read Extended Pause */
	65	#define MPC52xx_ATA_HOSTSTAT_RERR 0x02000000UL /* Read Error */
	66	#define MPC52xx_ATA_HOSTSTAT_WERR 0x01000000UL /* Write Error */
	67
	68	#define MPC52xx_ATA_FIFOSTAT_EMPTY 0x01 /* FIFO Empty */
	69
	70	#define MPC52xx_ATA_DMAMODE_WRITE 0x01 /* Write DMA */
	71	#define MPC52xx_ATA_DMAMODE_READ 0x02 /* Read DMA */
	72	#define MPC52xx_ATA_DMAMODE_UDMA 0x04 /* UDMA enabled */
	73	#define MPC52xx_ATA_DMAMODE_IE 0x08 /* Enable drive interrupt to CPU in DMA mode */
	74	#define MPC52xx_ATA_DMAMODE_FE 0x10 /* FIFO Flush enable in Rx mode */
	75	#define MPC52xx_ATA_DMAMODE_FR 0x20 /* FIFO Reset */
	76	#define MPC52xx_ATA_DMAMODE_HUT 0x40 /* Host UDMA burst terminate */
	77
	78
	79	/* Structure of the hardware registers */
	80	struct mpc52xx_ata {
	81
	82	/* Host interface registers */
	83	u32 config; /* ATA + 0x00 Host configuration */
	84	u32 host_status; /* ATA + 0x04 Host controller status */
	85	u32 pio1; /* ATA + 0x08 PIO Timing 1 */
	86	u32 pio2; /* ATA + 0x0c PIO Timing 2 */
	87	u32 mdma1; /* ATA + 0x10 MDMA Timing 1 */
	88	u32 mdma2; /* ATA + 0x14 MDMA Timing 2 */
	89	u32 udma1; /* ATA + 0x18 UDMA Timing 1 */
	90	u32 udma2; /* ATA + 0x1c UDMA Timing 2 */
	91	u32 udma3; /* ATA + 0x20 UDMA Timing 3 */
92	u32 udma4; /* ATA + 0x24 UDMA Timing 4 */
93	u32 udma5; /* ATA + 0x28 UDMA Timing 5 */
94	u32 share_cnt; /* ATA + 0x2c ATA share counter */
95	u32 reserved0[3];
96
97	/* FIFO registers */
98	u32 fifo_data; /* ATA + 0x3c */
99	u8 fifo_status_frame; /* ATA + 0x40 */
100	u8 fifo_status; /* ATA + 0x41 */
101	u16 reserved7[1];
102	u8 fifo_control; /* ATA + 0x44 */
103	u8 reserved8[5];
104	u16 fifo_alarm; /* ATA + 0x4a */
105	u16 reserved9;
106	u16 fifo_rdp; /* ATA + 0x4e */
107	u16 reserved10;
108	u16 fifo_wrp; /* ATA + 0x52 */
109	u16 reserved11;
110	u16 fifo_lfrdp; /* ATA + 0x56 */
111	u16 reserved12;
112	u16 fifo_lfwrp; /* ATA + 0x5a */
113
114	/* Drive TaskFile registers */
115	u8 tf_control; /* ATA + 0x5c TASKFILE Control/Alt Status */
116	u8 reserved13[3];
117	u16 tf_data; /* ATA + 0x60 TASKFILE Data */
118	u16 reserved14;
119	u8 tf_features; /* ATA + 0x64 TASKFILE Features/Error */
120	u8 reserved15[3];
121	u8 tf_sec_count; /* ATA + 0x68 TASKFILE Sector Count */
122	u8 reserved16[3];
123	u8 tf_sec_num; /* ATA + 0x6c TASKFILE Sector Number */
124	u8 reserved17[3];
125	u8 tf_cyl_low; /* ATA + 0x70 TASKFILE Cylinder Low */
126	u8 reserved18[3];
127	u8 tf_cyl_high; /* ATA + 0x74 TASKFILE Cylinder High */
128	u8 reserved19[3];
129	u8 tf_dev_head; /* ATA + 0x78 TASKFILE Device/Head */
130	u8 reserved20[3];
131	u8 tf_command; /* ATA + 0x7c TASKFILE Command/Status */
132	u8 dma_mode; /* ATA + 0x7d ATA Host DMA Mode configuration */
133	u8 reserved21[2];
134	};
135
136
137	/* ======================================================================== */
138	/* Aux fns */
139	/* ======================================================================== */
140
141
142	/* MPC52xx low level hw control */
143
144	static int
145	mpc52xx_ata_compute_pio_timings(struct mpc52xx_ata_priv *priv, int dev, int pio)
146	{
147	struct mpc52xx_ata_timings *timing = &priv->timings[dev];
148	unsigned int ipb_period = priv->ipb_period;
149	unsigned int t0, t1, t2_8, t2_16, t2i, t4, ta;
150
151	if ((pio<0) \|\| (pio>4))
152	return -EINVAL;
153
154	t0 = CALC_CLKCYC(ipb_period, 1000 * ataspec_t0[pio]);
155	t1 = CALC_CLKCYC(ipb_period, 1000 * ataspec_t1[pio]);
156	t2_8 = CALC_CLKCYC(ipb_period, 1000 * ataspec_t2_8[pio]);
157	t2_16 = CALC_CLKCYC(ipb_period, 1000 * ataspec_t2_16[pio]);
158	t2i = CALC_CLKCYC(ipb_period, 1000 * ataspec_t2i[pio]);
159	t4 = CALC_CLKCYC(ipb_period, 1000 * ataspec_t4[pio]);
160	ta = CALC_CLKCYC(ipb_period, 1000 * ataspec_ta[pio]);
161
162	timing->pio1 = (t0 << 24) \| (t2_8 << 16) \| (t2_16 << 8) \| (t2i);
163	timing->pio2 = (t4 << 24) \| (t1 << 16) \| (ta << 8);
164
165	return 0;
166	}
167
168	static void
169	mpc52xx_ata_apply_timings(struct mpc52xx_ata_priv *priv, int device)
170	{
171	struct mpc52xx_ata __iomem *regs = priv->ata_regs;
172	struct mpc52xx_ata_timings *timing = &priv->timings[device];
173
174	out_be32(&regs->pio1, timing->pio1);
175	out_be32(&regs->pio2, timing->pio2);
176	out_be32(&regs->mdma1, 0);
177	out_be32(&regs->mdma2, 0);
178	out_be32(&regs->udma1, 0);
179	out_be32(&regs->udma2, 0);
180	out_be32(&regs->udma3, 0);
181	out_be32(&regs->udma4, 0);
182	out_be32(&regs->udma5, 0);
183
184	priv->csel = device;
185	}
186
187	static int
188	mpc52xx_ata_hw_init(struct mpc52xx_ata_priv *priv)
189	{
190	struct mpc52xx_ata __iomem *regs = priv->ata_regs;
191	int tslot;
192
193	/* Clear share_cnt (all sample code do this ...) */
194	out_be32(&regs->share_cnt, 0);
195
196	/* Configure and reset host */
197	out_be32(&regs->config,
198	MPC52xx_ATA_HOSTCONF_IE \|
199	MPC52xx_ATA_HOSTCONF_IORDY \|
200	MPC52xx_ATA_HOSTCONF_SMR \|
201	MPC52xx_ATA_HOSTCONF_FR);
202
203	udelay(10);
204
205	out_be32(&regs->config,
206	MPC52xx_ATA_HOSTCONF_IE \|
207	MPC52xx_ATA_HOSTCONF_IORDY);
208
209	/* Set the time slot to 1us */
210	tslot = CALC_CLKCYC(priv->ipb_period, 1000000);
211	out_be32(&regs->share_cnt, tslot << 16 );
212
213	/* Init timings to PIO0 */
214	memset(priv->timings, 0x00, 2*sizeof(struct mpc52xx_ata_timings));
215
216	mpc52xx_ata_compute_pio_timings(priv, 0, 0);
217	mpc52xx_ata_compute_pio_timings(priv, 1, 0);
218
219	mpc52xx_ata_apply_timings(priv, 0);
220
221	return 0;
222	}
223
224
225	/* ======================================================================== */
226	/* libata driver */
227	/* ======================================================================== */
228
229	static void
230	mpc52xx_ata_set_piomode(struct ata_port ap, struct ata_device adev)
231	{
232	struct mpc52xx_ata_priv *priv = ap->host->private_data;
233	int pio, rv;
234
235	pio = adev->pio_mode - XFER_PIO_0;
236
237	rv = mpc52xx_ata_compute_pio_timings(priv, adev->devno, pio);
238
239	if (rv) {
240	printk(KERN_ERR DRV_NAME
241	": Trying to select invalid PIO mode %d\n", pio);
242	return;
243	}
244
245	mpc52xx_ata_apply_timings(priv, adev->devno);
246	}
247	static void
248	mpc52xx_ata_dev_select(struct ata_port *ap, unsigned int device)
249	{
250	struct mpc52xx_ata_priv *priv = ap->host->private_data;
251
252	if (device != priv->csel)
253	mpc52xx_ata_apply_timings(priv, device);
254
9363c382	255	ata_sff_dev_select(ap,device);
155d2916 SM	256	}
155d2916 SM	257
155d2916	258	static struct scsi_host_template mpc52xx_ata_sht = {
68d1d07b	259	ATA_PIO_SHT(DRV_NAME),
155d2916 SM	260	};
	261
	262	static struct ata_port_operations mpc52xx_ata_port_ops = {
029cfd6b	263	.inherits = &ata_sff_port_ops,
5682ed33	264	.sff_dev_select = mpc52xx_ata_dev_select,
a0fcdc02	265	.cable_detect = ata_cable_40wire,
029cfd6b	266	.set_piomode = mpc52xx_ata_set_piomode,
029cfd6b	267	.post_internal_cmd = ATA_OP_NULL,
155d2916 SM	268	};
155d2916 SM	269
155d2916	270	static int __devinit
cbcdd875 TH	271	mpc52xx_ata_init_one(struct device dev, struct mpc52xx_ata_priv priv,
cbcdd875 TH	272	unsigned long raw_ata_regs)
155d2916	273	{
5d728824 TH	274	struct ata_host *host;
	275	struct ata_port *ap;
	276	struct ata_ioports *aio;
5d728824 TH	277
	278	host = ata_host_alloc(dev, 1);
	279	if (!host)
	280	return -ENOMEM;
	281
	282	ap = host->ports[0];
	283	ap->flags \|= ATA_FLAG_SLAVE_POSS;
	284	ap->pio_mask = 0x1f; /* Up to PIO4 */
	285	ap->mwdma_mask = 0x00; /* No MWDMA */
	286	ap->udma_mask = 0x00; /* No UDMA */
	287	ap->ops = &mpc52xx_ata_port_ops;
	288	host->private_data = priv;
	289
	290	aio = &ap->ioaddr;
89952d13	291	aio->cmd_addr = NULL; /* Don't have a classic reg block */
0d5ff566 TH	292	aio->altstatus_addr = &priv->ata_regs->tf_control;
	293	aio->ctl_addr = &priv->ata_regs->tf_control;
	294	aio->data_addr = &priv->ata_regs->tf_data;
	295	aio->error_addr = &priv->ata_regs->tf_features;
	296	aio->feature_addr = &priv->ata_regs->tf_features;
	297	aio->nsect_addr = &priv->ata_regs->tf_sec_count;
	298	aio->lbal_addr = &priv->ata_regs->tf_sec_num;
	299	aio->lbam_addr = &priv->ata_regs->tf_cyl_low;
	300	aio->lbah_addr = &priv->ata_regs->tf_cyl_high;
	301	aio->device_addr = &priv->ata_regs->tf_dev_head;
	302	aio->status_addr = &priv->ata_regs->tf_command;
	303	aio->command_addr = &priv->ata_regs->tf_command;
155d2916	304
cbcdd875 TH	305	ata_port_desc(ap, "ata_regs 0x%lx", raw_ata_regs);
cbcdd875 TH	306
5d728824	307	/* activate host */
9363c382	308	return ata_host_activate(host, priv->ata_irq, ata_sff_interrupt, 0,
5d728824	309	&mpc52xx_ata_sht);
155d2916 SM	310	}
	311
	312	static struct mpc52xx_ata_priv *
	313	mpc52xx_ata_remove_one(struct device *dev)
	314	{
	315	struct ata_host *host = dev_get_drvdata(dev);
	316	struct mpc52xx_ata_priv *priv = host->private_data;
	317
24dc5f33	318	ata_host_detach(host);
155d2916 SM	319
	320	return priv;
	321	}
	322
	323
	324	/* ======================================================================== */
	325	/* OF Platform driver */
	326	/* ======================================================================== */
	327
	328	static int __devinit
	329	mpc52xx_ata_probe(struct of_device op, const struct of_device_id match)
	330	{
	331	unsigned int ipb_freq;
	332	struct resource res_mem;
0eaea364	333	int ata_irq;
24dc5f33 TH	334	struct mpc52xx_ata __iomem *ata_regs;
24dc5f33 TH	335	struct mpc52xx_ata_priv *priv;
155d2916 SM	336	int rv;
	337
	338	/* Get ipb frequency */
	339	ipb_freq = mpc52xx_find_ipb_freq(op->node);
	340	if (!ipb_freq) {
	341	printk(KERN_ERR DRV_NAME ": "
	342	"Unable to find IPB Bus frequency\n" );
	343	return -ENODEV;
	344	}
	345
	346	/* Get IRQ and register */
	347	rv = of_address_to_resource(op->node, 0, &res_mem);
	348	if (rv) {
	349	printk(KERN_ERR DRV_NAME ": "
	350	"Error while parsing device node resource\n" );
	351	return rv;
	352	}
	353
	354	ata_irq = irq_of_parse_and_map(op->node, 0);
	355	if (ata_irq == NO_IRQ) {
	356	printk(KERN_ERR DRV_NAME ": "
	357	"Error while mapping the irq\n");
	358	return -EINVAL;
	359	}
	360
	361	/* Request mem region */
24dc5f33 TH	362	if (!devm_request_mem_region(&op->dev, res_mem.start,
24dc5f33 TH	363	sizeof(struct mpc52xx_ata), DRV_NAME)) {
155d2916 SM	364	printk(KERN_ERR DRV_NAME ": "
155d2916 SM	365	"Error while requesting mem region\n");
24dc5f33 TH	366	rv = -EBUSY;
24dc5f33 TH	367	goto err;
155d2916 SM	368	}
	369
	370	/* Remap registers */
24dc5f33 TH	371	ata_regs = devm_ioremap(&op->dev, res_mem.start,
24dc5f33 TH	372	sizeof(struct mpc52xx_ata));
155d2916 SM	373	if (!ata_regs) {
	374	printk(KERN_ERR DRV_NAME ": "
	375	"Error while mapping register set\n");
	376	rv = -ENOMEM;
	377	goto err;
	378	}
	379
	380	/* Prepare our private structure */
24dc5f33 TH	381	priv = devm_kzalloc(&op->dev, sizeof(struct mpc52xx_ata_priv),
24dc5f33 TH	382	GFP_ATOMIC);
155d2916 SM	383	if (!priv) {
	384	printk(KERN_ERR DRV_NAME ": "
	385	"Error while allocating private structure\n");
	386	rv = -ENOMEM;
	387	goto err;
	388	}
	389
	390	priv->ipb_period = 1000000000 / (ipb_freq / 1000);
	391	priv->ata_regs = ata_regs;
	392	priv->ata_irq = ata_irq;
	393	priv->csel = -1;
	394
	395	/* Init the hw */
	396	rv = mpc52xx_ata_hw_init(priv);
	397	if (rv) {
	398	printk(KERN_ERR DRV_NAME ": Error during HW init\n");
	399	goto err;
	400	}
	401
	402	/* Register ourselves to libata */
cbcdd875	403	rv = mpc52xx_ata_init_one(&op->dev, priv, res_mem.start);
155d2916 SM	404	if (rv) {
	405	printk(KERN_ERR DRV_NAME ": "
	406	"Error while registering to ATA layer\n");
	407	return rv;
	408	}
	409
	410	/* Done */
	411	return 0;
	412
	413	/* Error path */
	414	err:
155d2916	415	irq_dispose_mapping(ata_irq);
155d2916 SM	416	return rv;
	417	}
	418
	419	static int
	420	mpc52xx_ata_remove(struct of_device *op)
	421	{
	422	struct mpc52xx_ata_priv *priv;
155d2916	423
155d2916	424	priv = mpc52xx_ata_remove_one(&op->dev);
155d2916 SM	425	irq_dispose_mapping(priv->ata_irq);
155d2916 SM	426
155d2916 SM	427	return 0;
	428	}
	429
	430
	431	#ifdef CONFIG_PM
	432
	433	static int
	434	mpc52xx_ata_suspend(struct of_device *op, pm_message_t state)
	435	{
35142ddb DP	436	struct ata_host *host = dev_get_drvdata(&op->dev);
	437
	438	return ata_host_suspend(host, state);
155d2916 SM	439	}
	440
	441	static int
	442	mpc52xx_ata_resume(struct of_device *op)
	443	{
35142ddb DP	444	struct ata_host *host = dev_get_drvdata(&op->dev);
	445	struct mpc52xx_ata_priv *priv = host->private_data;
	446	int rv;
	447
	448	rv = mpc52xx_ata_hw_init(priv);
	449	if (rv) {
	450	printk(KERN_ERR DRV_NAME ": Error during HW init\n");
	451	return rv;
	452	}
	453
	454	ata_host_resume(host);
	455
	456	return 0;
155d2916 SM	457	}
	458
	459	#endif
	460
	461
	462	static struct of_device_id mpc52xx_ata_of_match[] = {
66ffbe49 GL	463	{ .compatible = "fsl,mpc5200-ata", },
66ffbe49 GL	464	{ .compatible = "mpc5200-ata", },
155d2916 SM	465	{},
	466	};
	467
	468
	469	static struct of_platform_driver mpc52xx_ata_of_platform_driver = {
	470	.owner = THIS_MODULE,
	471	.name = DRV_NAME,
	472	.match_table = mpc52xx_ata_of_match,
	473	.probe = mpc52xx_ata_probe,
	474	.remove = mpc52xx_ata_remove,
	475	#ifdef CONFIG_PM
	476	.suspend = mpc52xx_ata_suspend,
	477	.resume = mpc52xx_ata_resume,
	478	#endif
	479	.driver = {
	480	.name = DRV_NAME,
	481	.owner = THIS_MODULE,
	482	},
	483	};
	484
	485
	486	/* ======================================================================== */
	487	/* Module */
	488	/* ======================================================================== */
	489
	490	static int __init
	491	mpc52xx_ata_init(void)
	492	{
	493	printk(KERN_INFO "ata: MPC52xx IDE/ATA libata driver\n");
	494	return of_register_platform_driver(&mpc52xx_ata_of_platform_driver);
	495	}
	496
	497	static void __exit
	498	mpc52xx_ata_exit(void)
	499	{
	500	of_unregister_platform_driver(&mpc52xx_ata_of_platform_driver);
	501	}
	502
	503	module_init(mpc52xx_ata_init);
	504	module_exit(mpc52xx_ata_exit);
	505
	506	MODULE_AUTHOR("Sylvain Munaut <tnt@246tNt.com>");
	507	MODULE_DESCRIPTION("Freescale MPC52xx IDE/ATA libata driver");
	508	MODULE_LICENSE("GPL");
	509	MODULE_DEVICE_TABLE(of, mpc52xx_ata_of_match);
	510	MODULE_VERSION(DRV_VERSION);
	511