[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ide / h8300 / ide-h8300.c

/*
 * drivers/ide/h8300/ide-h8300.c
 * H8/300 generic IDE interface
 */

#include <linux/init.h>
#include <linux/ide.h>

#include <asm/io.h>
#include <asm/irq.h>

#define bswap(d) \
({					\
	u16 r;				\
	__asm__("mov.b %w1,r1h\n\t"	\
		"mov.b %x1,r1l\n\t"	\
		"mov.w r1,%0"		\
		:"=r"(r)		\
		:"r"(d)			\
		:"er1");		\
	(r);				\
})

static void mm_outw(u16 d, unsigned long a)
{
	__asm__("mov.b %w0,r2h\n\t"
		"mov.b %x0,r2l\n\t"
		"mov.w r2,@%1"
		:
		:"r"(d),"r"(a)
		:"er2");
}

static u16 mm_inw(unsigned long a)
{
	register u16 r __asm__("er0");
	__asm__("mov.w @%1,r2\n\t"
		"mov.b r2l,%x0\n\t"
		"mov.b r2h,%w0"
		:"=r"(r)
		:"r"(a)
		:"er2");
	return r;
}

static void mm_outsw(unsigned long addr, void *buf, u32 len)
{
	unsigned short *bp = (unsigned short *)buf;
	for (; len > 0; len--, bp++)
		*(volatile u16 *)addr = bswap(*bp);
}

static void mm_insw(unsigned long addr, void *buf, u32 len)
{
	unsigned short *bp = (unsigned short *)buf;
	for (; len > 0; len--, bp++)
		*bp = bswap(*(volatile u16 *)addr);
}

#define H8300_IDE_GAP (2)

static inline void hw_setup(hw_regs_t *hw)
{
	int i;

	memset(hw, 0, sizeof(hw_regs_t));
	for (i = 0; i <= IDE_STATUS_OFFSET; i++)
		hw->io_ports[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
	hw->io_ports[IDE_CONTROL_OFFSET] = CONFIG_H8300_IDE_ALT;
	hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
	hw->chipset = ide_generic;
}

static inline void hwif_setup(ide_hwif_t *hwif)
{
	default_hwif_iops(hwif);

	hwif->mmio  = 1;
	hwif->OUTW  = mm_outw;
	hwif->OUTSW = mm_outsw;
	hwif->INW   = mm_inw;
	hwif->INSW  = mm_insw;
	hwif->OUTSL = NULL;
	hwif->INSL  = NULL;
}

void __init h8300_ide_init(void)
{
	hw_regs_t hw;
	ide_hwif_t *hwif;
	int index;
	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };

	if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
		goto out_busy;
	if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
		release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
		goto out_busy;
	}

	hw_setup(&hw);

	/* register if */
	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
	if (hwif == NULL) {
		printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
		return;
	}

	index = hwif->index;
	ide_init_port_data(hwif, index);
	ide_init_port_hw(hwif, &hw);
	hwif_setup(hwif);
	printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", index);

	idx[0] = index;

	ide_device_add(idx);

	return;

out_busy:
	printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
}
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* drivers/ide/h8300/ide-h8300.c
1da177e4 LT	3	* H8/300 generic IDE interface
	4	*/
	5
	6	#include <linux/init.h>
	7	#include <linux/ide.h>
1da177e4 LT	8
	9	#include <asm/io.h>
	10	#include <asm/irq.h>
	11
	12	#define bswap(d) \
	13	({ \
	14	u16 r; \
	15	__asm__("mov.b %w1,r1h\n\t" \
	16	"mov.b %x1,r1l\n\t" \
	17	"mov.w r1,%0" \
	18	:"=r"(r) \
	19	:"r"(d) \
	20	:"er1"); \
	21	(r); \
	22	})
	23
	24	static void mm_outw(u16 d, unsigned long a)
	25	{
	26	__asm__("mov.b %w0,r2h\n\t"
	27	"mov.b %x0,r2l\n\t"
	28	"mov.w r2,@%1"
	29	:
	30	:"r"(d),"r"(a)
	31	:"er2");
	32	}
	33
	34	static u16 mm_inw(unsigned long a)
	35	{
	36	register u16 r __asm__("er0");
	37	__asm__("mov.w @%1,r2\n\t"
	38	"mov.b r2l,%x0\n\t"
	39	"mov.b r2h,%w0"
	40	:"=r"(r)
	41	:"r"(a)
	42	:"er2");
	43	return r;
	44	}
	45
	46	static void mm_outsw(unsigned long addr, void *buf, u32 len)
	47	{
	48	unsigned short bp = (unsigned short )buf;
	49	for (; len > 0; len--, bp++)
	50	(volatile u16 )addr = bswap(*bp);
	51	}
	52
	53	static void mm_insw(unsigned long addr, void *buf, u32 len)
	54	{
	55	unsigned short bp = (unsigned short )buf;
	56	for (; len > 0; len--, bp++)
	57	bp = bswap((volatile u16 *)addr);
	58	}
	59
	60	#define H8300_IDE_GAP (2)
	61
	62	static inline void hw_setup(hw_regs_t *hw)
	63	{
	64	int i;
	65
	66	memset(hw, 0, sizeof(hw_regs_t));
	67	for (i = 0; i <= IDE_STATUS_OFFSET; i++)
	68	hw->io_ports[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
	69	hw->io_ports[IDE_CONTROL_OFFSET] = CONFIG_H8300_IDE_ALT;
	70	hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
1da177e4 LT	71	hw->chipset = ide_generic;
	72	}
	73
	74	static inline void hwif_setup(ide_hwif_t *hwif)
	75	{
	76	default_hwif_iops(hwif);
	77
2ad1e558	78	hwif->mmio = 1;
1da177e4 LT	79	hwif->OUTW = mm_outw;
	80	hwif->OUTSW = mm_outsw;
	81	hwif->INW = mm_inw;
	82	hwif->INSW = mm_insw;
1da177e4 LT	83	hwif->OUTSL = NULL;
	84	hwif->INSL = NULL;
	85	}
	86
	87	void __init h8300_ide_init(void)
	88	{
	89	hw_regs_t hw;
	90	ide_hwif_t *hwif;
cbb010c1	91	int index;
8ac4ce74	92	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
1da177e4 LT	93
	94	if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
	95	goto out_busy;
	96	if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
	97	release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
	98	goto out_busy;
	99	}
	100
	101	hw_setup(&hw);
	102
	103	/* register if */
cbb010c1 BZ	104	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
cbb010c1 BZ	105	if (hwif == NULL) {
1da177e4 LT	106	printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
	107	return;
	108	}
	109
cbb010c1 BZ	110	index = hwif->index;
	111	ide_init_port_data(hwif, index);
	112	ide_init_port_hw(hwif, &hw);
1da177e4	113	hwif_setup(hwif);
cbb010c1	114	printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", index);
8ac4ce74 BZ	115
	116	idx[0] = index;
	117
	118	ide_device_add(idx);
	119
1da177e4 LT	120	return;
	121
	122	out_busy:
	123	printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
	124	}