Add 2.6.27 support to rb532, nand is not recognized, needs to be sorted out

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13224 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 68 insertions, 0 deletions

diff --git a/target/linux/rb532/patches-2.6.27/005-pata_rb532_cf_4bytes_rw.patch b/target/linux/rb532/patches-2.6.27/005-pata_rb532_cf_4bytes_rw.patch
new file mode 100644
index 000000000..c8e682014
--- /dev/null
+++ b/target/linux/rb532/patches-2.6.27/005-pata_rb532_cf_4bytes_rw.patch
@@ -0,0 +1,68 @@
+* rename the offset definition to avoid abiguity with the standard ATA
+  IO address
+* read and write four bytes at once like the original driver does
+* use writesl() and readsl() which implicitly iterate over the data
+
+This patch assumes buflen to be a multiple of four, which is true for
+ATA devices. ATAPI support is not known, though unlikely, as the
+original driver always transfers 512 Bytes at once.
+
+Signed-off-by: Phil Sutter <n0-1@freewrt.org>
+Acked-by: Sergei Shtyltov <sshtylyov@ru.mvista.com>
+---
+ drivers/ata/pata_rb532_cf.c |   20 +++++++++-----------
+ 1 files changed, 9 insertions(+), 11 deletions(-)
+
+diff --git a/drivers/ata/pata_rb532_cf.c b/drivers/ata/pata_rb532_cf.c
+index 7b11f40..b919012 100644
+--- a/drivers/ata/pata_rb532_cf.c
++++ b/drivers/ata/pata_rb532_cf.c
+@@ -43,7 +43,8 @@
+ #define RB500_CF_REG_BASE	0x0800
+ #define RB500_CF_REG_ERR	0x080D
+ #define RB500_CF_REG_CTRL	0x080E
+-#define RB500_CF_REG_DATA	0x0C00
++/* 32bit buffered data register offset */
++#define RB500_CF_REG_DBUF32	0x0C00
+ 
+ struct rb532_cf_info {
+ 	void __iomem	*iobase;
+@@ -74,19 +75,16 @@ static void rb532_pata_exec_command(struct ata_port *ap,
+ 	rb532_pata_finish_io(ap);
+ }
+ 
+-static void rb532_pata_data_xfer(struct ata_device *adev, unsigned char *buf,
+-				unsigned int buflen, int write_data)
++static void rb532_pata_data_xfer(struct ata_device *adev,
++		unsigned char *buf, unsigned int buflen, int write_data)
+ {
+ 	struct ata_port *ap = adev->link->ap;
+ 	void __iomem *ioaddr = ap->ioaddr.data_addr;
+ 
+-	if (write_data) {
+-		for (; buflen > 0; buflen--, buf++)
+-			writeb(*buf, ioaddr);
+-	} else {
+-		for (; buflen > 0; buflen--, buf++)
+-			*buf = readb(ioaddr);
+-	}
++	if (write_data)
++		writesl(ioaddr, buf, buflen / sizeof(u32));
++	else
++		readsl(ioaddr, buf, buflen / sizeof(u32));
+ 
+ 	rb532_pata_finish_io(adev->link->ap);
+ }
+@@ -156,7 +154,7 @@ static void rb532_pata_setup_ports(struct ata_host *ah)
+ 
+ 	ata_sff_std_ports(&ap->ioaddr);
+ 
+-	ap->ioaddr.data_addr	= info->iobase + RB500_CF_REG_DATA;
++	ap->ioaddr.data_addr	= info->iobase + RB500_CF_REG_DBUF32;
+ 	ap->ioaddr.error_addr	= info->iobase + RB500_CF_REG_ERR;
+ }
+ 
+-- 
+1.5.6.4
+
+