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Commit 5d1d2f8c authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Bartlomiej Zolnierkiewicz
Browse files

TXx9: Add TX4938 ATA support (v3) 



Add a helper routine to register tx4938ide driver and use it on
RBTX4938 board.

Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 37897989

arch/mips/include/asm/txx9/tx4938.h

+13 −0
Original line number Diff line number Diff line
@@ -292,4 +292,17 @@ void tx4938_setup_pcierr_irq(void); 
void tx4938_irq_init(void);

void tx4938_mtd_init(int ch);



struct tx4938ide_platform_info {

	/*

	 * I/O port shift, for platforms with ports that are

	 * constantly spaced and need larger than the 1-byte

	 * spacing used by ata_std_ports().

	 */

	unsigned int ioport_shift;

	unsigned int gbus_clock;	/*  0 means no PIO mode tuning. */

	unsigned int ebus_ch;

};



void tx4938_ata_init(unsigned int irq, unsigned int shift, int tune);



#endif

arch/mips/txx9/generic/setup_tx4938.c

+47 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/param.h>

#include <linux/ptrace.h>

#include <linux/mtd/physmap.h>

#include <linux/platform_device.h>

#include <asm/reboot.h>

#include <asm/traps.h>

#include <asm/txx9irq.h>
@@ -335,6 +336,52 @@ void __init tx4938_mtd_init(int ch) 
	txx9_physmap_flash_init(ch, start, size, &pdata);

}



void __init tx4938_ata_init(unsigned int irq, unsigned int shift, int tune)

{

	struct platform_device *pdev;

	struct resource res[] = {

		{

			/* .start and .end are filled in later */

			.flags = IORESOURCE_MEM,

		}, {

			.start = irq,

			.flags = IORESOURCE_IRQ,

		},

	};

	struct tx4938ide_platform_info pdata = {

		.ioport_shift = shift,

		/*

		 * The IDE driver should not change bus timings if other ISA

		 * devices existed.

		 */

		.gbus_clock = tune ? txx9_gbus_clock : 0,

	};

	u64 ebccr;

	int i;



	if ((__raw_readq(&tx4938_ccfgptr->pcfg) &

	     (TX4938_PCFG_ATA_SEL | TX4938_PCFG_NDF_SEL))

	    != TX4938_PCFG_ATA_SEL)

		return;

	for (i = 0; i < 8; i++) {

		/* check EBCCRn.ISA, EBCCRn.BSZ, EBCCRn.ME */

		ebccr = __raw_readq(&tx4938_ebuscptr->cr[i]);

		if ((ebccr & 0x00f00008) == 0x00e00008)

			break;

	}

	if (i == 8)

		return;

	pdata.ebus_ch = i;

	res[0].start = ((ebccr >> 48) << 20) + 0x10000;

	res[0].end = res[0].start + 0x20000 - 1;

	pdev = platform_device_alloc("tx4938ide", -1);

	if (!pdev ||

	    platform_device_add_resources(pdev, res, ARRAY_SIZE(res)) ||

	    platform_device_add_data(pdev, &pdata, sizeof(pdata)) ||

	    platform_device_add(pdev))

		platform_device_put(pdev);

}



static void __init tx4938_stop_unused_modules(void)

{

	__u64 pcfg, rst = 0, ckd = 0;

arch/mips/txx9/rbtx4938/setup.c

+1 −0
Original line number Diff line number Diff line
@@ -352,6 +352,7 @@ static void __init rbtx4938_device_init(void) 
	rbtx4938_ne_init();

	tx4938_wdt_init();

	rbtx4938_mtd_init();

	tx4938_ata_init(RBTX4938_IRQ_IOC_ATA, 0, 1);

	txx9_iocled_init(RBTX4938_LED_ADDR - IO_BASE, -1, 8, 1, "green", NULL);

}