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TXx9: Add TX4938 ATA support (v3) 

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

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
hifive-unleashed-5.1
Atsushi Nemoto 2008-10-23 23:22:08 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 3789798923
commit 5d1d2f8c26
3 changed files with 61 additions and 0 deletions
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13
arch/mips/include/asm/txx9/tx4938.h
View File

@ -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

47
arch/mips/txx9/generic/setup_tx4938.c
View File

@ -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;

1
arch/mips/txx9/rbtx4938/setup.c
View File

@ -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);
}