[net-next-2.6.git] / drivers / ata / pata_winbond.c

/*
 *    pata_winbond.c - Winbond VLB ATA controllers
 *	(C) 2006 Red Hat <alan@redhat.com>
 *
 *    Support for the Winbond 83759A when operating in advanced mode.
 *    Multichip mode is not currently supported.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/platform_device.h>

#define DRV_NAME "pata_winbond"
#define DRV_VERSION "0.0.3"

#define NR_HOST 4	/* Two winbond controllers, two channels each */

struct winbond_data {
	unsigned long config;
	struct platform_device *platform_dev;
};

static struct ata_host *winbond_host[NR_HOST];
static struct winbond_data winbond_data[NR_HOST];
static int nr_winbond_host;

#ifdef MODULE
static int probe_winbond = 1;
#else
static int probe_winbond;
#endif

static DEFINE_SPINLOCK(winbond_lock);

static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
{
	unsigned long flags;
	spin_lock_irqsave(&winbond_lock, flags);
	outb(reg, port + 0x01);
	outb(val, port + 0x02);
	spin_unlock_irqrestore(&winbond_lock, flags);
}

static u8 winbond_readcfg(unsigned long port, u8 reg)
{
	u8 val;

	unsigned long flags;
	spin_lock_irqsave(&winbond_lock, flags);
	outb(reg, port + 0x01);
	val = inb(port + 0x02);
	spin_unlock_irqrestore(&winbond_lock, flags);

	return val;
}

static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	struct ata_timing t;
	struct winbond_data *winbond = ap->host->private_data;
	int active, recovery;
	u8 reg;
	int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);

	reg = winbond_readcfg(winbond->config, 0x81);

	/* Get the timing data in cycles */
	if (reg & 0x40)		/* Fast VLB bus, assume 50MHz */
		ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
	else
		ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);

	active = (FIT(t.active, 3, 17) - 1) & 0x0F;
	recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F;
	timing = (active << 4) | recovery;
	winbond_writecfg(winbond->config, timing, reg);

	/* Load the setup timing */

	reg = 0x35;
	if (adev->class != ATA_DEV_ATA)
		reg |= 0x08;	/* FIFO off */
	if (!ata_pio_need_iordy(adev))
		reg |= 0x02;	/* IORDY off */
	reg |= (FIT(t.setup, 0, 3) << 6);
	winbond_writecfg(winbond->config, timing + 1, reg);
}


static void winbond_data_xfer(struct ata_device *dev, unsigned char *buf,
			      unsigned int buflen, int rw)
{
	struct ata_port *ap = dev->link->ap;
	int slop = buflen & 3;

	if (ata_id_has_dword_io(dev->id)) {
		if (rw == READ)
			ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
		else
			iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);

		if (unlikely(slop)) {
			u32 pad;
			if (rw == READ) {
				pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
				memcpy(buf + buflen - slop, &pad, slop);
			} else {
				memcpy(&pad, buf + buflen - slop, slop);
				iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
			}
			buflen += 4 - slop;
		}
	} else
		buflen = ata_data_xfer(dev, buf, buflen, rw);

	return buflen;
}

static struct scsi_host_template winbond_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		= LIBATA_MAX_PRD,
	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
	.emulated		= ATA_SHT_EMULATED,
	.use_clustering		= ATA_SHT_USE_CLUSTERING,
	.proc_name		= DRV_NAME,
	.dma_boundary		= ATA_DMA_BOUNDARY,
	.slave_configure	= ata_scsi_slave_config,
	.slave_destroy		= ata_scsi_slave_destroy,
	.bios_param		= ata_std_bios_param,
};

static struct ata_port_operations winbond_port_ops = {
	.set_piomode	= winbond_set_piomode,

	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	= ata_std_dev_select,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= ata_bmdma_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ata_cable_40wire,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= winbond_data_xfer,

	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,

	.port_start	= ata_sff_port_start,
};

/**
 *	winbond_init_one		-	attach a winbond interface
 *	@type: Type to display
 *	@io: I/O port start
 *	@irq: interrupt line
 *	@fast: True if on a > 33Mhz VLB
 *
 *	Register a VLB bus IDE interface. Such interfaces are PIO and we
 *	assume do not support IRQ sharing.
 */

static __init int winbond_init_one(unsigned long port)
{
	struct platform_device *pdev;
	u8 reg;
	int i, rc;

	reg = winbond_readcfg(port, 0x81);
	reg |= 0x80;	/* jumpered mode off */
	winbond_writecfg(port, 0x81, reg);
	reg = winbond_readcfg(port, 0x83);
	reg |= 0xF0;	/* local control */
	winbond_writecfg(port, 0x83, reg);
	reg = winbond_readcfg(port, 0x85);
	reg |= 0xF0;	/* programmable timing */
	winbond_writecfg(port, 0x85, reg);

	reg = winbond_readcfg(port, 0x81);

	if (!(reg & 0x03))		/* Disabled */
		return 0;

	for (i = 0; i < 2 ; i ++) {
		unsigned long cmd_port = 0x1F0 - (0x80 * i);
		unsigned long ctl_port = cmd_port + 0x206;
		struct ata_host *host;
		struct ata_port *ap;
		void __iomem *cmd_addr, *ctl_addr;

		if (!(reg & (1 << i)))
			continue;

		pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
		if (IS_ERR(pdev))
			return PTR_ERR(pdev);

		rc = -ENOMEM;
		host = ata_host_alloc(&pdev->dev, 1);
		if (!host)
			goto err_unregister;
		ap = host->ports[0];

		rc = -ENOMEM;
		cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
		ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
		if (!cmd_addr || !ctl_addr)
			goto err_unregister;

		ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);

		ap->ops = &winbond_port_ops;
		ap->pio_mask = 0x1F;
		ap->flags |= ATA_FLAG_SLAVE_POSS;
		ap->ioaddr.cmd_addr = cmd_addr;
		ap->ioaddr.altstatus_addr = ctl_addr;
		ap->ioaddr.ctl_addr = ctl_addr;
		ata_std_ports(&ap->ioaddr);

		/* hook in a private data structure per channel */
		host->private_data = &winbond_data[nr_winbond_host];
		winbond_data[nr_winbond_host].config = port;
		winbond_data[nr_winbond_host].platform_dev = pdev;

		/* activate */
		rc = ata_host_activate(host, 14 + i, ata_interrupt, 0,
				       &winbond_sht);
		if (rc)
			goto err_unregister;

		winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
	}

	return 0;

 err_unregister:
	platform_device_unregister(pdev);
	return rc;
}

/**
 *	winbond_init		-	attach winbond interfaces
 *
 *	Attach winbond IDE interfaces by scanning the ports it may occupy.
 */

static __init int winbond_init(void)
{
	static const unsigned long config[2] = { 0x130, 0x1B0 };

	int ct = 0;
	int i;

	if (probe_winbond == 0)
		return -ENODEV;

	/*
 	 *	Check both base addresses
	 */

	for (i = 0; i < 2; i++) {
		if (probe_winbond & (1<<i)) {
			int ret = 0;
			unsigned long port = config[i];

			if (request_region(port, 2, "pata_winbond")) {
				ret = winbond_init_one(port);
				if (ret <= 0)
					release_region(port, 2);
				else ct+= ret;
			}
		}
	}
	if (ct != 0)
		return 0;
	return -ENODEV;
}

static __exit void winbond_exit(void)
{
	int i;

	for (i = 0; i < nr_winbond_host; i++) {
		ata_host_detach(winbond_host[i]);
		release_region(winbond_data[i].config, 2);
		platform_device_unregister(winbond_data[i].platform_dev);
	}
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_init(winbond_init);
module_exit(winbond_exit);

module_param(probe_winbond, int, 0);
Commit	Line	Data
7e45b0e5 AC	1	/*
	2	* pata_winbond.c - Winbond VLB ATA controllers
	3	* (C) 2006 Red Hat <alan@redhat.com>
	4	*
	5	* Support for the Winbond 83759A when operating in advanced mode.
	6	* Multichip mode is not currently supported.
	7	*/
f20b16ff	8
7e45b0e5 AC	9	#include <linux/kernel.h>
7e45b0e5 AC	10	#include <linux/module.h>
7e45b0e5 AC	11	#include <linux/init.h>
	12	#include <linux/blkdev.h>
	13	#include <linux/delay.h>
	14	#include <scsi/scsi_host.h>
	15	#include <linux/libata.h>
	16	#include <linux/platform_device.h>
	17
	18	#define DRV_NAME "pata_winbond"
8bc3fc47	19	#define DRV_VERSION "0.0.3"
7e45b0e5 AC	20
	21	#define NR_HOST 4 /* Two winbond controllers, two channels each */
	22
	23	struct winbond_data {
	24	unsigned long config;
	25	struct platform_device *platform_dev;
	26	};
	27
	28	static struct ata_host *winbond_host[NR_HOST];
	29	static struct winbond_data winbond_data[NR_HOST];
	30	static int nr_winbond_host;
	31
	32	#ifdef MODULE
	33	static int probe_winbond = 1;
	34	#else
	35	static int probe_winbond;
	36	#endif
	37
22503631	38	static DEFINE_SPINLOCK(winbond_lock);
7e45b0e5 AC	39
	40	static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
	41	{
	42	unsigned long flags;
	43	spin_lock_irqsave(&winbond_lock, flags);
	44	outb(reg, port + 0x01);
	45	outb(val, port + 0x02);
	46	spin_unlock_irqrestore(&winbond_lock, flags);
	47	}
	48
	49	static u8 winbond_readcfg(unsigned long port, u8 reg)
	50	{
	51	u8 val;
	52
	53	unsigned long flags;
	54	spin_lock_irqsave(&winbond_lock, flags);
	55	outb(reg, port + 0x01);
	56	val = inb(port + 0x02);
	57	spin_unlock_irqrestore(&winbond_lock, flags);
	58
	59	return val;
	60	}
	61
	62	static void winbond_set_piomode(struct ata_port ap, struct ata_device adev)
	63	{
	64	struct ata_timing t;
	65	struct winbond_data *winbond = ap->host->private_data;
	66	int active, recovery;
	67	u8 reg;
	68	int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
	69
	70	reg = winbond_readcfg(winbond->config, 0x81);
f20b16ff	71
7e45b0e5 AC	72	/* Get the timing data in cycles */
	73	if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
	74	ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
	75	else
	76	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
	77
	78	active = (FIT(t.active, 3, 17) - 1) & 0x0F;
	79	recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F;
	80	timing = (active << 4) \| recovery;
	81	winbond_writecfg(winbond->config, timing, reg);
f20b16ff	82
7e45b0e5	83	/* Load the setup timing */
f20b16ff	84
7e45b0e5 AC	85	reg = 0x35;
	86	if (adev->class != ATA_DEV_ATA)
	87	reg \|= 0x08; /* FIFO off */
	88	if (!ata_pio_need_iordy(adev))
	89	reg \|= 0x02; /* IORDY off */
	90	reg \|= (FIT(t.setup, 0, 3) << 6);
	91	winbond_writecfg(winbond->config, timing + 1, reg);
	92	}
	93
	94
55dba312 TH	95	static void winbond_data_xfer(struct ata_device dev, unsigned char buf,
55dba312 TH	96	unsigned int buflen, int rw)
7e45b0e5	97	{
55dba312	98	struct ata_port *ap = dev->link->ap;
7e45b0e5 AC	99	int slop = buflen & 3;
7e45b0e5 AC	100
55dba312 TH	101	if (ata_id_has_dword_io(dev->id)) {
55dba312 TH	102	if (rw == READ)
0d5ff566	103	ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
55dba312 TH	104	else
55dba312 TH	105	iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
7e45b0e5 AC	106
7e45b0e5 AC	107	if (unlikely(slop)) {
55dba312 TH	108	u32 pad;
55dba312 TH	109	if (rw == READ) {
b50e56d8	110	pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
7e45b0e5	111	memcpy(buf + buflen - slop, &pad, slop);
55dba312 TH	112	} else {
	113	memcpy(&pad, buf + buflen - slop, slop);
	114	iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
7e45b0e5	115	}
55dba312	116	buflen += 4 - slop;
7e45b0e5 AC	117	}
7e45b0e5 AC	118	} else
55dba312 TH	119	buflen = ata_data_xfer(dev, buf, buflen, rw);
	120
	121	return buflen;
7e45b0e5 AC	122	}
	123
	124	static struct scsi_host_template winbond_sht = {
	125	.module = THIS_MODULE,
	126	.name = DRV_NAME,
	127	.ioctl = ata_scsi_ioctl,
	128	.queuecommand = ata_scsi_queuecmd,
	129	.can_queue = ATA_DEF_QUEUE,
	130	.this_id = ATA_SHT_THIS_ID,
	131	.sg_tablesize = LIBATA_MAX_PRD,
7e45b0e5 AC	132	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	133	.emulated = ATA_SHT_EMULATED,
	134	.use_clustering = ATA_SHT_USE_CLUSTERING,
	135	.proc_name = DRV_NAME,
	136	.dma_boundary = ATA_DMA_BOUNDARY,
	137	.slave_configure = ata_scsi_slave_config,
c972b60b	138	.slave_destroy = ata_scsi_slave_destroy,
7e45b0e5 AC	139	.bios_param = ata_std_bios_param,
	140	};
	141
	142	static struct ata_port_operations winbond_port_ops = {
7e45b0e5 AC	143	.set_piomode = winbond_set_piomode,
	144
	145	.tf_load = ata_tf_load,
	146	.tf_read = ata_tf_read,
	147	.check_status = ata_check_status,
	148	.exec_command = ata_exec_command,
	149	.dev_select = ata_std_dev_select,
	150
	151	.freeze = ata_bmdma_freeze,
	152	.thaw = ata_bmdma_thaw,
	153	.error_handler = ata_bmdma_error_handler,
	154	.post_internal_cmd = ata_bmdma_post_internal_cmd,
2f5344b1	155	.cable_detect = ata_cable_40wire,
7e45b0e5 AC	156
	157	.qc_prep = ata_qc_prep,
	158	.qc_issue = ata_qc_issue_prot,
	159
	160	.data_xfer = winbond_data_xfer,
	161
7e45b0e5	162	.irq_clear = ata_bmdma_irq_clear,
246ce3b6	163	.irq_on = ata_irq_on,
7e45b0e5	164
81ad1837	165	.port_start = ata_sff_port_start,
7e45b0e5 AC	166	};
	167
	168	/**
	169	* winbond_init_one - attach a winbond interface
	170	* @type: Type to display
	171	* @io: I/O port start
	172	* @irq: interrupt line
	173	* @fast: True if on a > 33Mhz VLB
	174	*
	175	* Register a VLB bus IDE interface. Such interfaces are PIO and we
	176	* assume do not support IRQ sharing.
	177	*/
	178
	179	static __init int winbond_init_one(unsigned long port)
	180	{
7e45b0e5	181	struct platform_device *pdev;
7e45b0e5	182	u8 reg;
5d728824	183	int i, rc;
7e45b0e5 AC	184
	185	reg = winbond_readcfg(port, 0x81);
	186	reg \|= 0x80; /* jumpered mode off */
	187	winbond_writecfg(port, 0x81, reg);
	188	reg = winbond_readcfg(port, 0x83);
	189	reg \|= 0xF0; /* local control */
	190	winbond_writecfg(port, 0x83, reg);
	191	reg = winbond_readcfg(port, 0x85);
	192	reg \|= 0xF0; /* programmable timing */
	193	winbond_writecfg(port, 0x85, reg);
	194
	195	reg = winbond_readcfg(port, 0x81);
f20b16ff	196
7e45b0e5 AC	197	if (!(reg & 0x03)) /* Disabled */
	198	return 0;
	199
	200	for (i = 0; i < 2 ; i ++) {
0d5ff566	201	unsigned long cmd_port = 0x1F0 - (0x80 * i);
cbcdd875	202	unsigned long ctl_port = cmd_port + 0x206;
5d728824 TH	203	struct ata_host *host;
5d728824 TH	204	struct ata_port *ap;
0d5ff566	205	void __iomem cmd_addr, ctl_addr;
7e45b0e5	206
5d728824 TH	207	if (!(reg & (1 << i)))
	208	continue;
	209
	210	pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
	211	if (IS_ERR(pdev))
	212	return PTR_ERR(pdev);
	213
	214	rc = -ENOMEM;
	215	host = ata_host_alloc(&pdev->dev, 1);
	216	if (!host)
	217	goto err_unregister;
cbcdd875	218	ap = host->ports[0];
5d728824 TH	219
	220	rc = -ENOMEM;
	221	cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
cbcdd875	222	ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
5d728824 TH	223	if (!cmd_addr \|\| !ctl_addr)
	224	goto err_unregister;
	225
cbcdd875 TH	226	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
cbcdd875 TH	227
5d728824 TH	228	ap->ops = &winbond_port_ops;
	229	ap->pio_mask = 0x1F;
	230	ap->flags \|= ATA_FLAG_SLAVE_POSS;
	231	ap->ioaddr.cmd_addr = cmd_addr;
	232	ap->ioaddr.altstatus_addr = ctl_addr;
	233	ap->ioaddr.ctl_addr = ctl_addr;
	234	ata_std_ports(&ap->ioaddr);
	235
	236	/* hook in a private data structure per channel */
	237	host->private_data = &winbond_data[nr_winbond_host];
	238	winbond_data[nr_winbond_host].config = port;
	239	winbond_data[nr_winbond_host].platform_dev = pdev;
	240
	241	/* activate */
	242	rc = ata_host_activate(host, 14 + i, ata_interrupt, 0,
	243	&winbond_sht);
	244	if (rc)
	245	goto err_unregister;
	246
	247	winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
7e45b0e5 AC	248	}
	249
	250	return 0;
5d728824 TH	251
	252	err_unregister:
	253	platform_device_unregister(pdev);
	254	return rc;
7e45b0e5 AC	255	}
	256
	257	/**
	258	* winbond_init - attach winbond interfaces
	259	*
	260	* Attach winbond IDE interfaces by scanning the ports it may occupy.
	261	*/
	262
	263	static __init int winbond_init(void)
	264	{
	265	static const unsigned long config[2] = { 0x130, 0x1B0 };
	266
	267	int ct = 0;
	268	int i;
f20b16ff	269
7e45b0e5 AC	270	if (probe_winbond == 0)
	271	return -ENODEV;
	272
	273	/*
	274	* Check both base addresses
	275	*/
	276
	277	for (i = 0; i < 2; i++) {
	278	if (probe_winbond & (1<<i)) {
	279	int ret = 0;
	280	unsigned long port = config[i];
	281
	282	if (request_region(port, 2, "pata_winbond")) {
	283	ret = winbond_init_one(port);
b447916e	284	if (ret <= 0)
7e45b0e5 AC	285	release_region(port, 2);
	286	else ct+= ret;
	287	}
	288	}
	289	}
	290	if (ct != 0)
	291	return 0;
	292	return -ENODEV;
	293	}
	294
	295	static __exit void winbond_exit(void)
	296	{
	297	int i;
	298
	299	for (i = 0; i < nr_winbond_host; i++) {
24dc5f33	300	ata_host_detach(winbond_host[i]);
7e45b0e5 AC	301	release_region(winbond_data[i].config, 2);
	302	platform_device_unregister(winbond_data[i].platform_dev);
	303	}
	304	}
	305
	306	MODULE_AUTHOR("Alan Cox");
	307	MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
	308	MODULE_LICENSE("GPL");
	309	MODULE_VERSION(DRV_VERSION);
	310
	311	module_init(winbond_init);
	312	module_exit(winbond_exit);
	313
	314	module_param(probe_winbond, int, 0);
	315