[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/pci.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 "0.0.1"

#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 spinlock_t winbond_lock = SPIN_LOCK_UNLOCKED;

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 *adev, unsigned char *buf, unsigned int buflen, int write_data)
{
	struct ata_port *ap = adev->ap;
	int slop = buflen & 3;

	if (ata_id_has_dword_io(adev->id)) {
		if (write_data)
			outsl(ap->ioaddr.data_addr, buf, buflen >> 2);
		else
			insl(ap->ioaddr.data_addr, buf, buflen >> 2);

		if (unlikely(slop)) {
			u32 pad;
			if (write_data) {
				memcpy(&pad, buf + buflen - slop, slop);
				outl(le32_to_cpu(pad), ap->ioaddr.data_addr);
			} else {
				pad = cpu_to_le16(inl(ap->ioaddr.data_addr));
				memcpy(buf + buflen - slop, &pad, slop);
			}
		}
	} else
		ata_pio_data_xfer(adev, buf, buflen, write_data);
}

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 = {
	.port_disable	= ata_port_disable,
	.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,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= winbond_data_xfer,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,

	.port_start	= ata_port_start,
	.port_stop	= ata_port_stop,
	.host_stop	= ata_host_stop
};

/**
 *	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 ata_probe_ent ae;
	struct platform_device *pdev;
	int ret;
	u8 reg;
	int i;

	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 ++) {

		if (reg & (1 << i)) {		
			/*
			 *	Fill in a probe structure first of all
			 */

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

			memset(&ae, 0, sizeof(struct ata_probe_ent));
			INIT_LIST_HEAD(&ae.node);
			ae.dev = &pdev->dev;

			ae.port_ops = &winbond_port_ops;
			ae.pio_mask = 0x1F;

			ae.sht = &winbond_sht;
	
			ae.n_ports = 1;
			ae.irq = 14 + i;
			ae.irq_flags = 0;
			ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
			ae.port[0].cmd_addr = 0x1F0 - (0x80 * i);
			ae.port[0].altstatus_addr = ae.port[0].cmd_addr + 0x0206;
			ae.port[0].ctl_addr = ae.port[0].altstatus_addr;
			ata_std_ports(&ae.port[0]);
			/*
			 *	Hook in a private data structure per channel
			 */
			ae.private_data = &winbond_data[nr_winbond_host];
			winbond_data[nr_winbond_host].config = port;
			winbond_data[nr_winbond_host].platform_dev = pdev;

			ret = ata_device_add(&ae);
			if (ret == 0) {
				platform_device_unregister(pdev);
				return -ENODEV;
			}
			winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
		}
	}

	return 0;
}

/**
 *	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_remove(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	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/module.h>
	11	#include <linux/pci.h>
	12	#include <linux/init.h>
	13	#include <linux/blkdev.h>
	14	#include <linux/delay.h>
	15	#include <scsi/scsi_host.h>
	16	#include <linux/libata.h>
	17	#include <linux/platform_device.h>
	18
	19	#define DRV_NAME "pata_winbond"
	20	#define DRV_VERSION "0.0.1"
	21
	22	#define NR_HOST 4 /* Two winbond controllers, two channels each */
	23
	24	struct winbond_data {
	25	unsigned long config;
	26	struct platform_device *platform_dev;
	27	};
	28
	29	static struct ata_host *winbond_host[NR_HOST];
	30	static struct winbond_data winbond_data[NR_HOST];
	31	static int nr_winbond_host;
	32
	33	#ifdef MODULE
	34	static int probe_winbond = 1;
	35	#else
	36	static int probe_winbond;
	37	#endif
	38
	39	static spinlock_t winbond_lock = SPIN_LOCK_UNLOCKED;
	40
	41	static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
	42	{
	43	unsigned long flags;
	44	spin_lock_irqsave(&winbond_lock, flags);
	45	outb(reg, port + 0x01);
	46	outb(val, port + 0x02);
	47	spin_unlock_irqrestore(&winbond_lock, flags);
	48	}
	49
	50	static u8 winbond_readcfg(unsigned long port, u8 reg)
	51	{
	52	u8 val;
	53
	54	unsigned long flags;
	55	spin_lock_irqsave(&winbond_lock, flags);
	56	outb(reg, port + 0x01);
	57	val = inb(port + 0x02);
	58	spin_unlock_irqrestore(&winbond_lock, flags);
	59
	60	return val;
	61	}
	62
	63	static void winbond_set_piomode(struct ata_port ap, struct ata_device adev)
	64	{
65	struct ata_timing t;
66	struct winbond_data *winbond = ap->host->private_data;
67	int active, recovery;
68	u8 reg;
69	int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
70
71	reg = winbond_readcfg(winbond->config, 0x81);
72
73	/* Get the timing data in cycles */
74	if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
75	ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
76	else
77	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
78
79	active = (FIT(t.active, 3, 17) - 1) & 0x0F;
80	recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F;
81	timing = (active << 4) \| recovery;
82	winbond_writecfg(winbond->config, timing, reg);
83
84	/* Load the setup timing */
85
86	reg = 0x35;
87	if (adev->class != ATA_DEV_ATA)
88	reg \|= 0x08; /* FIFO off */
89	if (!ata_pio_need_iordy(adev))
90	reg \|= 0x02; /* IORDY off */
91	reg \|= (FIT(t.setup, 0, 3) << 6);
92	winbond_writecfg(winbond->config, timing + 1, reg);
93	}
94
95
96	static void winbond_data_xfer(struct ata_device adev, unsigned char buf, unsigned int buflen, int write_data)
97	{
98	struct ata_port *ap = adev->ap;
99	int slop = buflen & 3;
100
101	if (ata_id_has_dword_io(adev->id)) {
102	if (write_data)
103	outsl(ap->ioaddr.data_addr, buf, buflen >> 2);
104	else
105	insl(ap->ioaddr.data_addr, buf, buflen >> 2);
106
107	if (unlikely(slop)) {
108	u32 pad;
109	if (write_data) {
110	memcpy(&pad, buf + buflen - slop, slop);
111	outl(le32_to_cpu(pad), ap->ioaddr.data_addr);
112	} else {
113	pad = cpu_to_le16(inl(ap->ioaddr.data_addr));
114	memcpy(buf + buflen - slop, &pad, slop);
115	}
116	}
117	} else
118	ata_pio_data_xfer(adev, buf, buflen, write_data);
119	}
120
121	static struct scsi_host_template winbond_sht = {
122	.module = THIS_MODULE,
123	.name = DRV_NAME,
124	.ioctl = ata_scsi_ioctl,
125	.queuecommand = ata_scsi_queuecmd,
126	.can_queue = ATA_DEF_QUEUE,
127	.this_id = ATA_SHT_THIS_ID,
128	.sg_tablesize = LIBATA_MAX_PRD,
7e45b0e5 AC	129	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	130	.emulated = ATA_SHT_EMULATED,
	131	.use_clustering = ATA_SHT_USE_CLUSTERING,
	132	.proc_name = DRV_NAME,
	133	.dma_boundary = ATA_DMA_BOUNDARY,
	134	.slave_configure = ata_scsi_slave_config,
c972b60b	135	.slave_destroy = ata_scsi_slave_destroy,
7e45b0e5 AC	136	.bios_param = ata_std_bios_param,
	137	};
	138
	139	static struct ata_port_operations winbond_port_ops = {
	140	.port_disable = ata_port_disable,
	141	.set_piomode = winbond_set_piomode,
	142
	143	.tf_load = ata_tf_load,
	144	.tf_read = ata_tf_read,
	145	.check_status = ata_check_status,
	146	.exec_command = ata_exec_command,
	147	.dev_select = ata_std_dev_select,
	148
	149	.freeze = ata_bmdma_freeze,
	150	.thaw = ata_bmdma_thaw,
	151	.error_handler = ata_bmdma_error_handler,
	152	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	153
	154	.qc_prep = ata_qc_prep,
	155	.qc_issue = ata_qc_issue_prot,
	156
	157	.data_xfer = winbond_data_xfer,
	158
	159	.irq_handler = ata_interrupt,
	160	.irq_clear = ata_bmdma_irq_clear,
	161
	162	.port_start = ata_port_start,
	163	.port_stop = ata_port_stop,
	164	.host_stop = ata_host_stop
	165	};
	166
	167	/**
	168	* winbond_init_one - attach a winbond interface
	169	* @type: Type to display
	170	* @io: I/O port start
	171	* @irq: interrupt line
	172	* @fast: True if on a > 33Mhz VLB
	173	*
	174	* Register a VLB bus IDE interface. Such interfaces are PIO and we
	175	* assume do not support IRQ sharing.
	176	*/
	177
	178	static __init int winbond_init_one(unsigned long port)
	179	{
	180	struct ata_probe_ent ae;
	181	struct platform_device *pdev;
	182	int ret;
	183	u8 reg;
	184	int i;
	185
	186	reg = winbond_readcfg(port, 0x81);
	187	reg \|= 0x80; /* jumpered mode off */
	188	winbond_writecfg(port, 0x81, reg);
	189	reg = winbond_readcfg(port, 0x83);
	190	reg \|= 0xF0; /* local control */
	191	winbond_writecfg(port, 0x83, reg);
	192	reg = winbond_readcfg(port, 0x85);
	193	reg \|= 0xF0; /* programmable timing */
	194	winbond_writecfg(port, 0x85, reg);
	195
	196	reg = winbond_readcfg(port, 0x81);
	197
	198	if (!(reg & 0x03)) /* Disabled */
	199	return 0;
200
201	for (i = 0; i < 2 ; i ++) {
202
203	if (reg & (1 << i)) {
204	/*
205	* Fill in a probe structure first of all
206	*/
207
208	pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
9825d73c AM	209	if (IS_ERR(pdev))
9825d73c AM	210	return PTR_ERR(pdev);
7e45b0e5 AC	211
	212	memset(&ae, 0, sizeof(struct ata_probe_ent));
	213	INIT_LIST_HEAD(&ae.node);
	214	ae.dev = &pdev->dev;
	215
	216	ae.port_ops = &winbond_port_ops;
	217	ae.pio_mask = 0x1F;
	218
	219	ae.sht = &winbond_sht;
	220
	221	ae.n_ports = 1;
	222	ae.irq = 14 + i;
	223	ae.irq_flags = 0;
	224	ae.port_flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST;
	225	ae.port[0].cmd_addr = 0x1F0 - (0x80 * i);
	226	ae.port[0].altstatus_addr = ae.port[0].cmd_addr + 0x0206;
	227	ae.port[0].ctl_addr = ae.port[0].altstatus_addr;
	228	ata_std_ports(&ae.port[0]);
	229	/*
	230	* Hook in a private data structure per channel
	231	*/
	232	ae.private_data = &winbond_data[nr_winbond_host];
	233	winbond_data[nr_winbond_host].config = port;
	234	winbond_data[nr_winbond_host].platform_dev = pdev;
	235
	236	ret = ata_device_add(&ae);
	237	if (ret == 0) {
	238	platform_device_unregister(pdev);
	239	return -ENODEV;
	240	}
	241	winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
	242	}
	243	}
	244
	245	return 0;
	246	}
	247
	248	/**
	249	* winbond_init - attach winbond interfaces
	250	*
	251	* Attach winbond IDE interfaces by scanning the ports it may occupy.
	252	*/
	253
	254	static __init int winbond_init(void)
	255	{
	256	static const unsigned long config[2] = { 0x130, 0x1B0 };
	257
	258	int ct = 0;
	259	int i;
	260
	261	if (probe_winbond == 0)
	262	return -ENODEV;
	263
	264	/*
	265	* Check both base addresses
	266	*/
	267
	268	for (i = 0; i < 2; i++) {
	269	if (probe_winbond & (1<<i)) {
	270	int ret = 0;
	271	unsigned long port = config[i];
	272
	273	if (request_region(port, 2, "pata_winbond")) {
	274	ret = winbond_init_one(port);
275	if(ret <= 0)
276	release_region(port, 2);
277	else ct+= ret;
278	}
279	}
280	}
281	if (ct != 0)
282	return 0;
283	return -ENODEV;
284	}
285
286	static __exit void winbond_exit(void)
287	{
288	int i;
289
290	for (i = 0; i < nr_winbond_host; i++) {
291	ata_host_remove(winbond_host[i]);
292	release_region(winbond_data[i].config, 2);
293	platform_device_unregister(winbond_data[i].platform_dev);
294	}
295	}
296
297	MODULE_AUTHOR("Alan Cox");
298	MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
299	MODULE_LICENSE("GPL");
300	MODULE_VERSION(DRV_VERSION);
301
302	module_init(winbond_init);
303	module_exit(winbond_exit);
304
305	module_param(probe_winbond, int, 0);
306