[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ata / pata_ixp4xx_cf.c

/*
 * ixp4xx PATA/Compact Flash driver
 * Copyright (c) 2006 Tower Technologies
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 *
 * An ATA driver to handle a Compact Flash connected
 * to the ixp4xx expansion bus in TrueIDE mode. The CF
 * must have it chip selects connected to two CS lines
 * on the ixp4xx. The interrupt line is optional, if not
 * specified the driver will run in polling mode.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/libata.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <scsi/scsi_host.h>

#define DRV_NAME	"pata_ixp4xx_cf"
#define DRV_VERSION	"0.1.3"

static int ixp4xx_set_mode(struct ata_port *ap, struct ata_device **error)
{
	int i;

	for (i = 0; i < ATA_MAX_DEVICES; i++) {
		struct ata_device *dev = &ap->device[i];
		if (ata_dev_enabled(dev)) {
			ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
			dev->pio_mode = XFER_PIO_0;
			dev->xfer_mode = XFER_PIO_0;
			dev->xfer_shift = ATA_SHIFT_PIO;
			dev->flags |= ATA_DFLAG_PIO;
		}
	}
	return 0;
}

static void ixp4xx_phy_reset(struct ata_port *ap)
{
	ap->cbl = ATA_CBL_PATA40;
	ata_port_probe(ap);
	ata_bus_reset(ap);
}

static void ixp4xx_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
				unsigned int buflen, int write_data)
{
	unsigned int i;
	unsigned int words = buflen >> 1;
	u16 *buf16 = (u16 *) buf;
	struct ata_port *ap = adev->ap;
	void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
	struct ixp4xx_pata_data *data = ap->host->dev->platform_data;

	/* set the expansion bus in 16bit mode and restore
	 * 8 bit mode after the transaction.
	 */
	*data->cs0_cfg &= ~(0x01);
	udelay(100);

	/* Transfer multiple of 2 bytes */
	if (write_data) {
		for (i = 0; i < words; i++)
			writew(buf16[i], mmio);
	} else {
		for (i = 0; i < words; i++)
			buf16[i] = readw(mmio);
	}

	/* Transfer trailing 1 byte, if any. */
	if (unlikely(buflen & 0x01)) {
		u16 align_buf[1] = { 0 };
		unsigned char *trailing_buf = buf + buflen - 1;

		if (write_data) {
			memcpy(align_buf, trailing_buf, 1);
			writew(align_buf[0], mmio);
		} else {
			align_buf[0] = readw(mmio);
			memcpy(trailing_buf, align_buf, 1);
		}
	}

	udelay(100);
	*data->cs0_cfg |= 0x01;
}

static void ixp4xx_irq_clear(struct ata_port *ap)
{
}

static struct scsi_host_template ixp4xx_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 ixp4xx_port_ops = {
	.set_mode	= ixp4xx_set_mode,
	.mode_filter	= ata_pci_default_filter,

	.port_disable	= ata_port_disable,
	.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,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,
	.eng_timeout	= ata_eng_timeout,
	.data_xfer	= ixp4xx_mmio_data_xfer,
	.cable_detect	= ata_cable_40wire,

	.irq_clear	= ixp4xx_irq_clear,
	.irq_on		= ata_irq_on,
	.irq_ack	= ata_irq_ack,

	.port_start	= ata_port_start,

	.phy_reset	= ixp4xx_phy_reset,
};

static void ixp4xx_setup_port(struct ata_ioports *ioaddr,
				struct ixp4xx_pata_data *data)
{
	ioaddr->cmd_addr	= data->cs0;
	ioaddr->altstatus_addr	= data->cs1 + 0x06;
	ioaddr->ctl_addr	= data->cs1 + 0x06;

	ata_std_ports(ioaddr);

#ifndef __ARMEB__

	/* adjust the addresses to handle the address swizzling of the
	 * ixp4xx in little endian mode.
	 */

	*(unsigned long *)&ioaddr->data_addr		^= 0x02;
	*(unsigned long *)&ioaddr->cmd_addr		^= 0x03;
	*(unsigned long *)&ioaddr->altstatus_addr	^= 0x03;
	*(unsigned long *)&ioaddr->ctl_addr		^= 0x03;
	*(unsigned long *)&ioaddr->error_addr		^= 0x03;
	*(unsigned long *)&ioaddr->feature_addr		^= 0x03;
	*(unsigned long *)&ioaddr->nsect_addr		^= 0x03;
	*(unsigned long *)&ioaddr->lbal_addr		^= 0x03;
	*(unsigned long *)&ioaddr->lbam_addr		^= 0x03;
	*(unsigned long *)&ioaddr->lbah_addr		^= 0x03;
	*(unsigned long *)&ioaddr->device_addr		^= 0x03;
	*(unsigned long *)&ioaddr->status_addr		^= 0x03;
	*(unsigned long *)&ioaddr->command_addr		^= 0x03;
#endif
}

static __devinit int ixp4xx_pata_probe(struct platform_device *pdev)
{
	unsigned int irq;
	struct resource *cs0, *cs1;
	struct ata_host *host;
	struct ata_port *ap;
	struct ixp4xx_pata_data *data = pdev->dev.platform_data;
	int rc;

	cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);

	if (!cs0 || !cs1)
		return -EINVAL;

	/* allocate host */
	host = ata_host_alloc(&pdev->dev, 1);
	if (!host)
		return -ENOMEM;

	/* acquire resources and fill host */
	pdev->dev.coherent_dma_mask = DMA_32BIT_MASK;

	data->cs0 = devm_ioremap(&pdev->dev, cs0->start, 0x1000);
	data->cs1 = devm_ioremap(&pdev->dev, cs1->start, 0x1000);

	irq = platform_get_irq(pdev, 0);
	if (irq)
		set_irq_type(irq, IRQT_RISING);

	/* Setup expansion bus chip selects */
	*data->cs0_cfg = data->cs0_bits;
	*data->cs1_cfg = data->cs1_bits;

	ap = host->ports[0];

	ap->ops	= &ixp4xx_port_ops;
	ap->pio_mask = 0x1f; /* PIO4 */
	ap->flags |= ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY | ATA_FLAG_NO_ATAPI;

	/* run in polling mode if no irq has been assigned */
	if (!irq)
		ap->flags |= ATA_FLAG_PIO_POLLING;

	ixp4xx_setup_port(&ap->ioaddr, data);

	dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");

	/* activate host */
	return ata_host_activate(host, irq, ata_interrupt, 0, &ixp4xx_sht);
}

static __devexit int ixp4xx_pata_remove(struct platform_device *dev)
{
	struct ata_host *host = platform_get_drvdata(dev);

	ata_host_detach(host);

	return 0;
}

static struct platform_driver ixp4xx_pata_platform_driver = {
	.driver	 = {
		.name   = DRV_NAME,
		.owner  = THIS_MODULE,
	},
	.probe		= ixp4xx_pata_probe,
	.remove		= __devexit_p(ixp4xx_pata_remove),
};

static int __init ixp4xx_pata_init(void)
{
	return platform_driver_register(&ixp4xx_pata_platform_driver);
}

static void __exit ixp4xx_pata_exit(void)
{
	platform_driver_unregister(&ixp4xx_pata_platform_driver);
}

MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("low-level driver for ixp4xx Compact Flash PATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_init(ixp4xx_pata_init);
module_exit(ixp4xx_pata_exit);
Commit	Line	Data
0df0d0a0 AZ	1	/*
	2	* ixp4xx PATA/Compact Flash driver
	3	* Copyright (c) 2006 Tower Technologies
	4	* Author: Alessandro Zummo <a.zummo@towertech.it>
	5	*
	6	* An ATA driver to handle a Compact Flash connected
	7	* to the ixp4xx expansion bus in TrueIDE mode. The CF
	8	* must have it chip selects connected to two CS lines
	9	* on the ixp4xx. The interrupt line is optional, if not
	10	* specified the driver will run in polling mode.
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License version 2 as
	14	* published by the Free Software Foundation.
	15	*
	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/libata.h>
	21	#include <linux/irq.h>
	22	#include <linux/platform_device.h>
	23	#include <scsi/scsi_host.h>
	24
	25	#define DRV_NAME "pata_ixp4xx_cf"
8bc3fc47	26	#define DRV_VERSION "0.1.3"
0df0d0a0	27
3ddcc591	28	static int ixp4xx_set_mode(struct ata_port ap, struct ata_device *error)
0df0d0a0 AZ	29	{
	30	int i;
	31
	32	for (i = 0; i < ATA_MAX_DEVICES; i++) {
	33	struct ata_device *dev = &ap->device[i];
9666f400	34	if (ata_dev_enabled(dev)) {
3ddcc591	35	ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
0df0d0a0 AZ	36	dev->pio_mode = XFER_PIO_0;
	37	dev->xfer_mode = XFER_PIO_0;
	38	dev->xfer_shift = ATA_SHIFT_PIO;
	39	dev->flags \|= ATA_DFLAG_PIO;
	40	}
	41	}
b229a7b0	42	return 0;
0df0d0a0 AZ	43	}
	44
	45	static void ixp4xx_phy_reset(struct ata_port *ap)
	46	{
	47	ap->cbl = ATA_CBL_PATA40;
	48	ata_port_probe(ap);
	49	ata_bus_reset(ap);
	50	}
	51
	52	static void ixp4xx_mmio_data_xfer(struct ata_device adev, unsigned char buf,
	53	unsigned int buflen, int write_data)
	54	{
	55	unsigned int i;
	56	unsigned int words = buflen >> 1;
	57	u16 buf16 = (u16 ) buf;
	58	struct ata_port *ap = adev->ap;
	59	void __iomem mmio = (void __iomem )ap->ioaddr.data_addr;
	60	struct ixp4xx_pata_data *data = ap->host->dev->platform_data;
	61
	62	/* set the expansion bus in 16bit mode and restore
	63	* 8 bit mode after the transaction.
	64	*/
	65	*data->cs0_cfg &= ~(0x01);
	66	udelay(100);
	67
	68	/* Transfer multiple of 2 bytes */
	69	if (write_data) {
	70	for (i = 0; i < words; i++)
	71	writew(buf16[i], mmio);
	72	} else {
	73	for (i = 0; i < words; i++)
	74	buf16[i] = readw(mmio);
	75	}
	76
	77	/* Transfer trailing 1 byte, if any. */
	78	if (unlikely(buflen & 0x01)) {
	79	u16 align_buf[1] = { 0 };
	80	unsigned char *trailing_buf = buf + buflen - 1;
	81
	82	if (write_data) {
	83	memcpy(align_buf, trailing_buf, 1);
	84	writew(align_buf[0], mmio);
	85	} else {
	86	align_buf[0] = readw(mmio);
	87	memcpy(trailing_buf, align_buf, 1);
	88	}
	89	}
	90
	91	udelay(100);
	92	*data->cs0_cfg \|= 0x01;
	93	}
	94
	95	static void ixp4xx_irq_clear(struct ata_port *ap)
	96	{
	97	}
	98
0df0d0a0 AZ	99	static struct scsi_host_template ixp4xx_sht = {
	100	.module = THIS_MODULE,
	101	.name = DRV_NAME,
	102	.ioctl = ata_scsi_ioctl,
	103	.queuecommand = ata_scsi_queuecmd,
	104	.can_queue = ATA_DEF_QUEUE,
	105	.this_id = ATA_SHT_THIS_ID,
	106	.sg_tablesize = LIBATA_MAX_PRD,
0df0d0a0 AZ	107	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	108	.emulated = ATA_SHT_EMULATED,
	109	.use_clustering = ATA_SHT_USE_CLUSTERING,
	110	.proc_name = DRV_NAME,
	111	.dma_boundary = ATA_DMA_BOUNDARY,
	112	.slave_configure = ata_scsi_slave_config,
c972b60b	113	.slave_destroy = ata_scsi_slave_destroy,
0df0d0a0 AZ	114	.bios_param = ata_std_bios_param,
	115	};
	116
	117	static struct ata_port_operations ixp4xx_port_ops = {
	118	.set_mode = ixp4xx_set_mode,
	119	.mode_filter = ata_pci_default_filter,
	120
	121	.port_disable = ata_port_disable,
	122	.tf_load = ata_tf_load,
	123	.tf_read = ata_tf_read,
	124	.check_status = ata_check_status,
	125	.exec_command = ata_exec_command,
	126	.dev_select = ata_std_dev_select,
	127
	128	.qc_prep = ata_qc_prep,
	129	.qc_issue = ata_qc_issue_prot,
	130	.eng_timeout = ata_eng_timeout,
	131	.data_xfer = ixp4xx_mmio_data_xfer,
a73984a0	132	.cable_detect = ata_cable_40wire,
0df0d0a0	133
0df0d0a0	134	.irq_clear = ixp4xx_irq_clear,
246ce3b6 AI	135	.irq_on = ata_irq_on,
246ce3b6 AI	136	.irq_ack = ata_irq_ack,
0df0d0a0 AZ	137
0df0d0a0 AZ	138	.port_start = ata_port_start,
0df0d0a0 AZ	139
	140	.phy_reset = ixp4xx_phy_reset,
	141	};
	142
	143	static void ixp4xx_setup_port(struct ata_ioports *ioaddr,
	144	struct ixp4xx_pata_data *data)
	145	{
0d5ff566 TH	146	ioaddr->cmd_addr = data->cs0;
	147	ioaddr->altstatus_addr = data->cs1 + 0x06;
	148	ioaddr->ctl_addr = data->cs1 + 0x06;
0df0d0a0 AZ	149
	150	ata_std_ports(ioaddr);
	151
	152	#ifndef __ARMEB__
	153
	154	/* adjust the addresses to handle the address swizzling of the
	155	* ixp4xx in little endian mode.
	156	*/
	157
0d5ff566 TH	158	(unsigned long )&ioaddr->data_addr ^= 0x02;
	159	(unsigned long )&ioaddr->cmd_addr ^= 0x03;
	160	(unsigned long )&ioaddr->altstatus_addr ^= 0x03;
	161	(unsigned long )&ioaddr->ctl_addr ^= 0x03;
	162	(unsigned long )&ioaddr->error_addr ^= 0x03;
	163	(unsigned long )&ioaddr->feature_addr ^= 0x03;
	164	(unsigned long )&ioaddr->nsect_addr ^= 0x03;
	165	(unsigned long )&ioaddr->lbal_addr ^= 0x03;
	166	(unsigned long )&ioaddr->lbam_addr ^= 0x03;
	167	(unsigned long )&ioaddr->lbah_addr ^= 0x03;
	168	(unsigned long )&ioaddr->device_addr ^= 0x03;
	169	(unsigned long )&ioaddr->status_addr ^= 0x03;
	170	(unsigned long )&ioaddr->command_addr ^= 0x03;
0df0d0a0 AZ	171	#endif
	172	}
	173
	174	static __devinit int ixp4xx_pata_probe(struct platform_device *pdev)
	175	{
0df0d0a0 AZ	176	unsigned int irq;
0df0d0a0 AZ	177	struct resource cs0, cs1;
5d728824 TH	178	struct ata_host *host;
5d728824 TH	179	struct ata_port *ap;
0df0d0a0	180	struct ixp4xx_pata_data *data = pdev->dev.platform_data;
5d728824	181	int rc;
0df0d0a0 AZ	182
	183	cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	184	cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	185
	186	if (!cs0 \|\| !cs1)
	187	return -EINVAL;
	188
5d728824 TH	189	/* allocate host */
	190	host = ata_host_alloc(&pdev->dev, 1);
	191	if (!host)
	192	return -ENOMEM;
	193
	194	/* acquire resources and fill host */
0df0d0a0 AZ	195	pdev->dev.coherent_dma_mask = DMA_32BIT_MASK;
0df0d0a0 AZ	196
24dc5f33 TH	197	data->cs0 = devm_ioremap(&pdev->dev, cs0->start, 0x1000);
24dc5f33 TH	198	data->cs1 = devm_ioremap(&pdev->dev, cs1->start, 0x1000);
0df0d0a0 AZ	199
	200	irq = platform_get_irq(pdev, 0);
	201	if (irq)
282c6b9c	202	set_irq_type(irq, IRQT_RISING);
0df0d0a0 AZ	203
	204	/* Setup expansion bus chip selects */
	205	*data->cs0_cfg = data->cs0_bits;
	206	*data->cs1_cfg = data->cs1_bits;
	207
5d728824	208	ap = host->ports[0];
0df0d0a0	209
5d728824 TH	210	ap->ops = &ixp4xx_port_ops;
	211	ap->pio_mask = 0x1f; /* PIO4 */
	212	ap->flags \|= ATA_FLAG_MMIO \| ATA_FLAG_NO_LEGACY \| ATA_FLAG_NO_ATAPI;
0df0d0a0 AZ	213
	214	/* run in polling mode if no irq has been assigned */
	215	if (!irq)
5d728824	216	ap->flags \|= ATA_FLAG_PIO_POLLING;
0df0d0a0	217
5d728824	218	ixp4xx_setup_port(&ap->ioaddr, data);
0df0d0a0 AZ	219
	220	dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
	221
5d728824 TH	222	/* activate host */
5d728824 TH	223	return ata_host_activate(host, irq, ata_interrupt, 0, &ixp4xx_sht);
0df0d0a0 AZ	224	}
	225
	226	static __devexit int ixp4xx_pata_remove(struct platform_device *dev)
	227	{
	228	struct ata_host *host = platform_get_drvdata(dev);
	229
24dc5f33	230	ata_host_detach(host);
0df0d0a0 AZ	231
	232	return 0;
	233	}
	234
	235	static struct platform_driver ixp4xx_pata_platform_driver = {
	236	.driver = {
	237	.name = DRV_NAME,
	238	.owner = THIS_MODULE,
	239	},
	240	.probe = ixp4xx_pata_probe,
	241	.remove = __devexit_p(ixp4xx_pata_remove),
	242	};
	243
	244	static int __init ixp4xx_pata_init(void)
	245	{
	246	return platform_driver_register(&ixp4xx_pata_platform_driver);
	247	}
	248
	249	static void __exit ixp4xx_pata_exit(void)
	250	{
	251	platform_driver_unregister(&ixp4xx_pata_platform_driver);
	252	}
	253
	254	MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
	255	MODULE_DESCRIPTION("low-level driver for ixp4xx Compact Flash PATA");
	256	MODULE_LICENSE("GPL");
	257	MODULE_VERSION(DRV_VERSION);
	258
	259	module_init(ixp4xx_pata_init);
	260	module_exit(ixp4xx_pata_exit);