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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2008-10-23 23:22:08 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-23 23:22:08 +0200 |
| commit | 5d1d2f8c26f2d197df1f4b6a7f4c0088b190343e (patch) | |
| tree | 7afc785b49f604111c6ebc78ec68208cee22abbb /arch/mips/txx9/generic | |
| parent | 37897989232e6533772b0e24369b35ee9f56c8b6 (diff) | |
| download | linux-5d1d2f8c26f2d197df1f4b6a7f4c0088b190343e.tar.bz2 | |
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>
Diffstat (limited to 'arch/mips/txx9/generic')
| -rw-r--r-- | arch/mips/txx9/generic/setup_tx4938.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/mips/txx9/generic/setup_tx4938.c b/arch/mips/txx9/generic/setup_tx4938.c index af724e53ef91..25819ff1c350 100644 --- a/arch/mips/txx9/generic/setup_tx4938.c +++ b/arch/mips/txx9/generic/setup_tx4938.c @@ -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; |