[net-next-2.6.git] / drivers / ide / tx4938ide.c

/*
 * TX4938 internal IDE driver
 * Based on tx4939ide.c.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * (C) Copyright TOSHIBA CORPORATION 2005-2007
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/txx9/tx4938.h>

static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
				 unsigned int gbus_clock,
				 u8 pio)
{
	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
	u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]);
	unsigned int sp = (cr >> 4) & 3;
	unsigned int clock = gbus_clock / (4 - sp);
	unsigned int cycle = 1000000000 / clock;
	unsigned int shwt;
	int wt;

	/* Minimum DIOx- active time */
	wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
	/* IORDY setup time: 35ns */
	wt = max_t(int, wt, DIV_ROUND_UP(35, cycle));
	/* actual wait-cycle is max(wt & ~1, 1) */
	if (wt > 2 && (wt & 1))
		wt++;
	wt &= ~1;
	/* Address-valid to DIOR/DIOW setup */
	shwt = DIV_ROUND_UP(t->setup, cycle);

	/* -DIOx recovery time (SHWT * 4) and cycle time requirement */
	while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle)
		shwt++;
	if (shwt > 7) {
		pr_warning("tx4938ide: SHWT violation (%d)\n", shwt);
		shwt = 7;
	}
	pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
		 ebus_ch, cycle, wt, shwt);

	__raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt,
		     &tx4938_ebuscptr->cr[ebus_ch]);
}

static void tx4938ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	ide_hwif_t *hwif = drive->hwif;
	struct tx4938ide_platform_info *pdata = hwif->dev->platform_data;
	u8 safe = pio;
	ide_drive_t *pair;

	pair = ide_get_pair_dev(drive);
	if (pair)
		safe = min(safe, ide_get_best_pio_mode(pair, 255, 5));
	tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe);
}

#ifdef __BIG_ENDIAN

/* custom iops (independent from SWAP_IO_SPACE) */
static u8 tx4938ide_inb(unsigned long port)
{
	return __raw_readb((void __iomem *)port);
}

static void tx4938ide_outb(u8 value, unsigned long port)
{
	__raw_writeb(value, (void __iomem *)port);
}

static void tx4938ide_tf_load(ide_drive_t *drive, ide_task_t *task)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	struct ide_taskfile *tf = &task->tf;
	u8 HIHI = task->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;

	if (task->tf_flags & IDE_TFLAG_FLAGGED)
		HIHI = 0xFF;

	if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
		u16 data = (tf->hob_data << 8) | tf->data;

		/* no endian swap */
		__raw_writew(data, (void __iomem *)io_ports->data_addr);
	}

	if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
		tx4938ide_outb(tf->hob_feature, io_ports->feature_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
		tx4938ide_outb(tf->hob_nsect, io_ports->nsect_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
		tx4938ide_outb(tf->hob_lbal, io_ports->lbal_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
		tx4938ide_outb(tf->hob_lbam, io_ports->lbam_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
		tx4938ide_outb(tf->hob_lbah, io_ports->lbah_addr);

	if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
		tx4938ide_outb(tf->feature, io_ports->feature_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
		tx4938ide_outb(tf->nsect, io_ports->nsect_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
		tx4938ide_outb(tf->lbal, io_ports->lbal_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
		tx4938ide_outb(tf->lbam, io_ports->lbam_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
		tx4938ide_outb(tf->lbah, io_ports->lbah_addr);

	if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
		tx4938ide_outb((tf->device & HIHI) | drive->select,
			       io_ports->device_addr);
}

static void tx4938ide_tf_read(ide_drive_t *drive, ide_task_t *task)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	struct ide_taskfile *tf = &task->tf;

	if (task->tf_flags & IDE_TFLAG_IN_DATA) {
		u16 data;

		/* no endian swap */
		data = __raw_readw((void __iomem *)io_ports->data_addr);
		tf->data = data & 0xff;
		tf->hob_data = (data >> 8) & 0xff;
	}

	/* be sure we're looking at the low order bits */
	tx4938ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);

	if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
		tf->feature = tx4938ide_inb(io_ports->feature_addr);
	if (task->tf_flags & IDE_TFLAG_IN_NSECT)
		tf->nsect  = tx4938ide_inb(io_ports->nsect_addr);
	if (task->tf_flags & IDE_TFLAG_IN_LBAL)
		tf->lbal   = tx4938ide_inb(io_ports->lbal_addr);
	if (task->tf_flags & IDE_TFLAG_IN_LBAM)
		tf->lbam   = tx4938ide_inb(io_ports->lbam_addr);
	if (task->tf_flags & IDE_TFLAG_IN_LBAH)
		tf->lbah   = tx4938ide_inb(io_ports->lbah_addr);
	if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
		tf->device = tx4938ide_inb(io_ports->device_addr);

	if (task->tf_flags & IDE_TFLAG_LBA48) {
		tx4938ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);

		if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
			tf->hob_feature =
				tx4938ide_inb(io_ports->feature_addr);
		if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
			tf->hob_nsect   = tx4938ide_inb(io_ports->nsect_addr);
		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
			tf->hob_lbal    = tx4938ide_inb(io_ports->lbal_addr);
		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
			tf->hob_lbam    = tx4938ide_inb(io_ports->lbam_addr);
		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
			tf->hob_lbah    = tx4938ide_inb(io_ports->lbah_addr);
	}
}

static void tx4938ide_input_data_swap(ide_drive_t *drive, struct request *rq,
				void *buf, unsigned int len)
{
	unsigned long port = drive->hwif->io_ports.data_addr;
	unsigned short *ptr = buf;
	unsigned int count = (len + 1) / 2;

	while (count--)
		*ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
	__ide_flush_dcache_range((unsigned long)buf, count * 2);
}

static void tx4938ide_output_data_swap(ide_drive_t *drive, struct request *rq,
				void *buf, unsigned int len)
{
	unsigned long port = drive->hwif->io_ports.data_addr;
	unsigned short *ptr = buf;
	unsigned int count = (len + 1) / 2;

	while (count--) {
		__raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
		ptr++;
	}
	__ide_flush_dcache_range((unsigned long)buf, count * 2);
}

static const struct ide_tp_ops tx4938ide_tp_ops = {
	.exec_command		= ide_exec_command,
	.read_status		= ide_read_status,
	.read_altstatus		= ide_read_altstatus,
	.read_sff_dma_status	= ide_read_sff_dma_status,

	.set_irq		= ide_set_irq,

	.tf_load		= tx4938ide_tf_load,
	.tf_read		= tx4938ide_tf_read,

	.input_data		= tx4938ide_input_data_swap,
	.output_data		= tx4938ide_output_data_swap,
};

#endif	/* __BIG_ENDIAN */

static const struct ide_port_ops tx4938ide_port_ops = {
	.set_pio_mode = tx4938ide_set_pio_mode,
};

static const struct ide_port_info tx4938ide_port_info __initdata = {
	.port_ops = &tx4938ide_port_ops,
#ifdef __BIG_ENDIAN
	.tp_ops = &tx4938ide_tp_ops,
#endif
	.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
	.pio_mask = ATA_PIO5,
};

static int __init tx4938ide_probe(struct platform_device *pdev)
{
	hw_regs_t hw;
	hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
	struct ide_host *host;
	struct resource *res;
	struct tx4938ide_platform_info *pdata = pdev->dev.platform_data;
	int irq, ret, i;
	unsigned long mapbase, mapctl;
	struct ide_port_info d = tx4938ide_port_info;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return -ENODEV;
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

	if (!devm_request_mem_region(&pdev->dev, res->start,
				     res->end - res->start + 1, "tx4938ide"))
		return -EBUSY;
	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
					      8 << pdata->ioport_shift);
	mapctl = (unsigned long)devm_ioremap(&pdev->dev,
					     res->start + 0x10000 +
					     (6 << pdata->ioport_shift),
					     1 << pdata->ioport_shift);
	if (!mapbase || !mapctl)
		return -EBUSY;

	memset(&hw, 0, sizeof(hw));
	if (pdata->ioport_shift) {
		unsigned long port = mapbase;
		unsigned long ctl = mapctl;

		hw.io_ports_array[0] = port;
#ifdef __BIG_ENDIAN
		port++;
		ctl++;
#endif
		for (i = 1; i <= 7; i++)
			hw.io_ports_array[i] =
				port + (i << pdata->ioport_shift);
		hw.io_ports.ctl_addr = ctl;
	} else
		ide_std_init_ports(&hw, mapbase, mapctl);
	hw.irq = irq;
	hw.dev = &pdev->dev;

	pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n",
		mapbase, mapctl, hw.irq);
	if (pdata->gbus_clock)
		tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
	else
		d.port_ops = NULL;
	ret = ide_host_add(&d, hws, &host);
	if (!ret)
		platform_set_drvdata(pdev, host);
	return ret;
}

static int __exit tx4938ide_remove(struct platform_device *pdev)
{
	struct ide_host *host = platform_get_drvdata(pdev);

	ide_host_remove(host);
	return 0;
}

static struct platform_driver tx4938ide_driver = {
	.driver		= {
		.name	= "tx4938ide",
		.owner	= THIS_MODULE,
	},
	.remove = __exit_p(tx4938ide_remove),
};

static int __init tx4938ide_init(void)
{
	return platform_driver_probe(&tx4938ide_driver, tx4938ide_probe);
}

static void __exit tx4938ide_exit(void)
{
	platform_driver_unregister(&tx4938ide_driver);
}

module_init(tx4938ide_init);
module_exit(tx4938ide_exit);

MODULE_DESCRIPTION("TX4938 internal IDE driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:tx4938ide");
Commit	Line	Data
28502848 AN	1	/*
	2	* TX4938 internal IDE driver
	3	* Based on tx4939ide.c.
	4	*
	5	* This file is subject to the terms and conditions of the GNU General Public
	6	* License. See the file "COPYING" in the main directory of this archive
	7	* for more details.
	8	*
	9	* (C) Copyright TOSHIBA CORPORATION 2005-2007
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/types.h>
	14	#include <linux/ide.h>
	15	#include <linux/init.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/io.h>
	18	#include <asm/txx9/tx4938.h>
	19
	20	static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
	21	unsigned int gbus_clock,
	22	u8 pio)
	23	{
	24	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
	25	u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]);
	26	unsigned int sp = (cr >> 4) & 3;
	27	unsigned int clock = gbus_clock / (4 - sp);
	28	unsigned int cycle = 1000000000 / clock;
7afa0535 AN	29	unsigned int shwt;
7afa0535 AN	30	int wt;
28502848 AN	31
	32	/* Minimum DIOx- active time */
	33	wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
	34	/* IORDY setup time: 35ns */
7afa0535	35	wt = max_t(int, wt, DIV_ROUND_UP(35, cycle));
28502848 AN	36	/* actual wait-cycle is max(wt & ~1, 1) */
	37	if (wt > 2 && (wt & 1))
	38	wt++;
	39	wt &= ~1;
	40	/* Address-valid to DIOR/DIOW setup */
	41	shwt = DIV_ROUND_UP(t->setup, cycle);
	42
630a8b25 AN	43	/* -DIOx recovery time (SHWT * 4) and cycle time requirement */
	44	while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle)
	45	shwt++;
	46	if (shwt > 7) {
	47	pr_warning("tx4938ide: SHWT violation (%d)\n", shwt);
	48	shwt = 7;
	49	}
28502848 AN	50	pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
	51	ebus_ch, cycle, wt, shwt);
	52
630a8b25	53	__raw_writeq((cr & ~0x3f007ull) \| (wt << 12) \| shwt,
28502848 AN	54	&tx4938_ebuscptr->cr[ebus_ch]);
	55	}
	56
	57	static void tx4938ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
	58	{
	59	ide_hwif_t *hwif = drive->hwif;
	60	struct tx4938ide_platform_info *pdata = hwif->dev->platform_data;
	61	u8 safe = pio;
	62	ide_drive_t *pair;
	63
	64	pair = ide_get_pair_dev(drive);
	65	if (pair)
	66	safe = min(safe, ide_get_best_pio_mode(pair, 255, 5));
	67	tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe);
	68	}
	69
	70	#ifdef __BIG_ENDIAN
	71
	72	/* custom iops (independent from SWAP_IO_SPACE) */
	73	static u8 tx4938ide_inb(unsigned long port)
	74	{
	75	return __raw_readb((void __iomem *)port);
	76	}
	77
	78	static void tx4938ide_outb(u8 value, unsigned long port)
	79	{
	80	__raw_writeb(value, (void __iomem *)port);
	81	}
	82
	83	static void tx4938ide_tf_load(ide_drive_t drive, ide_task_t task)
	84	{
	85	ide_hwif_t *hwif = drive->hwif;
	86	struct ide_io_ports *io_ports = &hwif->io_ports;
	87	struct ide_taskfile *tf = &task->tf;
	88	u8 HIHI = task->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;
	89
	90	if (task->tf_flags & IDE_TFLAG_FLAGGED)
	91	HIHI = 0xFF;
	92
	93	if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
	94	u16 data = (tf->hob_data << 8) \| tf->data;
	95
	96	/* no endian swap */
	97	__raw_writew(data, (void __iomem *)io_ports->data_addr);
	98	}
	99
	100	if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
	101	tx4938ide_outb(tf->hob_feature, io_ports->feature_addr);
	102	if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
	103	tx4938ide_outb(tf->hob_nsect, io_ports->nsect_addr);
	104	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
	105	tx4938ide_outb(tf->hob_lbal, io_ports->lbal_addr);
	106	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
	107	tx4938ide_outb(tf->hob_lbam, io_ports->lbam_addr);
	108	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
	109	tx4938ide_outb(tf->hob_lbah, io_ports->lbah_addr);
	110
	111	if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
	112	tx4938ide_outb(tf->feature, io_ports->feature_addr);
	113	if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
	114	tx4938ide_outb(tf->nsect, io_ports->nsect_addr);
	115	if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
	116	tx4938ide_outb(tf->lbal, io_ports->lbal_addr);
	117	if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
118	tx4938ide_outb(tf->lbam, io_ports->lbam_addr);
119	if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
120	tx4938ide_outb(tf->lbah, io_ports->lbah_addr);
121
122	if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
123	tx4938ide_outb((tf->device & HIHI) \| drive->select,
124	io_ports->device_addr);
125	}
126
127	static void tx4938ide_tf_read(ide_drive_t drive, ide_task_t task)
128	{
129	ide_hwif_t *hwif = drive->hwif;
130	struct ide_io_ports *io_ports = &hwif->io_ports;
131	struct ide_taskfile *tf = &task->tf;
132
133	if (task->tf_flags & IDE_TFLAG_IN_DATA) {
134	u16 data;
135
136	/* no endian swap */
137	data = __raw_readw((void __iomem *)io_ports->data_addr);
138	tf->data = data & 0xff;
139	tf->hob_data = (data >> 8) & 0xff;
140	}
141
142	/* be sure we're looking at the low order bits */
143	tx4938ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
144
145	if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
146	tf->feature = tx4938ide_inb(io_ports->feature_addr);
147	if (task->tf_flags & IDE_TFLAG_IN_NSECT)
148	tf->nsect = tx4938ide_inb(io_ports->nsect_addr);
149	if (task->tf_flags & IDE_TFLAG_IN_LBAL)
150	tf->lbal = tx4938ide_inb(io_ports->lbal_addr);
151	if (task->tf_flags & IDE_TFLAG_IN_LBAM)
152	tf->lbam = tx4938ide_inb(io_ports->lbam_addr);
153	if (task->tf_flags & IDE_TFLAG_IN_LBAH)
154	tf->lbah = tx4938ide_inb(io_ports->lbah_addr);
155	if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
156	tf->device = tx4938ide_inb(io_ports->device_addr);
157
158	if (task->tf_flags & IDE_TFLAG_LBA48) {
159	tx4938ide_outb(ATA_DEVCTL_OBS \| 0x80, io_ports->ctl_addr);
160
161	if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
162	tf->hob_feature =
163	tx4938ide_inb(io_ports->feature_addr);
164	if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
165	tf->hob_nsect = tx4938ide_inb(io_ports->nsect_addr);
166	if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
167	tf->hob_lbal = tx4938ide_inb(io_ports->lbal_addr);
168	if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
169	tf->hob_lbam = tx4938ide_inb(io_ports->lbam_addr);
170	if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
171	tf->hob_lbah = tx4938ide_inb(io_ports->lbah_addr);
172	}
173	}
174
175	static void tx4938ide_input_data_swap(ide_drive_t drive, struct request rq,
176	void *buf, unsigned int len)
177	{
178	unsigned long port = drive->hwif->io_ports.data_addr;
179	unsigned short *ptr = buf;
180	unsigned int count = (len + 1) / 2;
181
182	while (count--)
183	ptr++ = cpu_to_le16(__raw_readw((void __iomem )port));
184	__ide_flush_dcache_range((unsigned long)buf, count * 2);
185	}
186
187	static void tx4938ide_output_data_swap(ide_drive_t drive, struct request rq,
188	void *buf, unsigned int len)
189	{
190	unsigned long port = drive->hwif->io_ports.data_addr;
191	unsigned short *ptr = buf;
192	unsigned int count = (len + 1) / 2;
193
194	while (count--) {
195	__raw_writew(le16_to_cpu(ptr), (void __iomem )port);
196	ptr++;
197	}
198	__ide_flush_dcache_range((unsigned long)buf, count * 2);
199	}
200
201	static const struct ide_tp_ops tx4938ide_tp_ops = {
202	.exec_command = ide_exec_command,
203	.read_status = ide_read_status,
204	.read_altstatus = ide_read_altstatus,
205	.read_sff_dma_status = ide_read_sff_dma_status,
206
207	.set_irq = ide_set_irq,
208
209	.tf_load = tx4938ide_tf_load,
210	.tf_read = tx4938ide_tf_read,
211
212	.input_data = tx4938ide_input_data_swap,
213	.output_data = tx4938ide_output_data_swap,
214	};
215
216	#endif /* __BIG_ENDIAN */
217
218	static const struct ide_port_ops tx4938ide_port_ops = {
219	.set_pio_mode = tx4938ide_set_pio_mode,
220	};
221
222	static const struct ide_port_info tx4938ide_port_info __initdata = {
223	.port_ops = &tx4938ide_port_ops,
224	#ifdef __BIG_ENDIAN
225	.tp_ops = &tx4938ide_tp_ops,
226	#endif
227	.host_flags = IDE_HFLAG_MMIO \| IDE_HFLAG_NO_DMA,
228	.pio_mask = ATA_PIO5,
229	};
230
231	static int __init tx4938ide_probe(struct platform_device *pdev)
232	{
233	hw_regs_t hw;
234	hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
235	struct ide_host *host;
236	struct resource *res;
237	struct tx4938ide_platform_info *pdata = pdev->dev.platform_data;
238	int irq, ret, i;
9d4eb0a3	239	unsigned long mapbase, mapctl;
28502848 AN	240	struct ide_port_info d = tx4938ide_port_info;
	241
	242	irq = platform_get_irq(pdev, 0);
	243	if (irq < 0)
	244	return -ENODEV;
	245	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	246	if (!res)
	247	return -ENODEV;
	248
	249	if (!devm_request_mem_region(&pdev->dev, res->start,
	250	res->end - res->start + 1, "tx4938ide"))
	251	return -EBUSY;
	252	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
9d4eb0a3 AN	253	8 << pdata->ioport_shift);
	254	mapctl = (unsigned long)devm_ioremap(&pdev->dev,
	255	res->start + 0x10000 +
	256	(6 << pdata->ioport_shift),
	257	1 << pdata->ioport_shift);
	258	if (!mapbase \|\| !mapctl)
28502848 AN	259	return -EBUSY;
	260
	261	memset(&hw, 0, sizeof(hw));
	262	if (pdata->ioport_shift) {
	263	unsigned long port = mapbase;
9d4eb0a3	264	unsigned long ctl = mapctl;
28502848 AN	265
	266	hw.io_ports_array[0] = port;
	267	#ifdef __BIG_ENDIAN
	268	port++;
9d4eb0a3	269	ctl++;
28502848 AN	270	#endif
	271	for (i = 1; i <= 7; i++)
	272	hw.io_ports_array[i] =
	273	port + (i << pdata->ioport_shift);
9d4eb0a3	274	hw.io_ports.ctl_addr = ctl;
28502848	275	} else
9d4eb0a3	276	ide_std_init_ports(&hw, mapbase, mapctl);
28502848 AN	277	hw.irq = irq;
	278	hw.dev = &pdev->dev;
	279
9d4eb0a3 AN	280	pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n",
9d4eb0a3 AN	281	mapbase, mapctl, hw.irq);
28502848 AN	282	if (pdata->gbus_clock)
	283	tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
	284	else
	285	d.port_ops = NULL;
	286	ret = ide_host_add(&d, hws, &host);
9d4eb0a3 AN	287	if (!ret)
	288	platform_set_drvdata(pdev, host);
	289	return ret;
28502848 AN	290	}
	291
	292	static int __exit tx4938ide_remove(struct platform_device *pdev)
	293	{
	294	struct ide_host *host = platform_get_drvdata(pdev);
	295
	296	ide_host_remove(host);
	297	return 0;
	298	}
	299
	300	static struct platform_driver tx4938ide_driver = {
	301	.driver = {
	302	.name = "tx4938ide",
	303	.owner = THIS_MODULE,
	304	},
	305	.remove = __exit_p(tx4938ide_remove),
	306	};
	307
	308	static int __init tx4938ide_init(void)
	309	{
	310	return platform_driver_probe(&tx4938ide_driver, tx4938ide_probe);
	311	}
	312
	313	static void __exit tx4938ide_exit(void)
	314	{
	315	platform_driver_unregister(&tx4938ide_driver);
	316	}
	317
	318	module_init(tx4938ide_init);
	319	module_exit(tx4938ide_exit);
	320
	321	MODULE_DESCRIPTION("TX4938 internal IDE driver");
	322	MODULE_LICENSE("GPL");
	323	MODULE_ALIAS("platform:tx4938ide");