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[ARM] orion5x: ts78xx add NAND support via plat_nand

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ts78xx add NAND support via plat_nand

Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Nicolas Pitre <nico@cam.org>
This commit is contained in:
Alexander Clouter 2009-02-23 22:40:01 +00:00 committed by Nicolas Pitre
parent 673492a800
commit 75bb6b9aab
3 changed files with 134 additions and 1 deletions
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2
arch/arm/configs/orion5x_defconfig
View file

@ -481,7 +481,7 @@ CONFIG_MTD_NAND_IDS=y
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_CAFE is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
CONFIG_MTD_NAND_PLATFORM=y
# CONFIG_MTD_ALAUDA is not set
CONFIG_MTD_NAND_ORION=y
# CONFIG_MTD_ONENAND is not set

1
arch/arm/mach-orion5x/ts78xx-fpga.h
View file

@ -17,6 +17,7 @@ struct fpga_device {
struct fpga_devices {
/* Technologic Systems */
struct fpga_device ts_rtc;
struct fpga_device ts_nand;
};
struct ts78xx_fpga_data {

132
arch/arm/mach-orion5x/ts78xx-setup.c
View file

@ -15,6 +15,8 @@
#include <linux/mv643xx_eth.h>
#include <linux/ata_platform.h>
#include <linux/m48t86.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@ -150,12 +152,130 @@ static void ts78xx_ts_rtc_unload(void)
platform_device_del(&ts78xx_ts_rtc_device);
}
/*****************************************************************************
* NAND Flash
****************************************************************************/
#define TS_NAND_CTRL (TS78XX_FPGA_REGS_VIRT_BASE | 0x800) /* VIRT */
#define TS_NAND_DATA (TS78XX_FPGA_REGS_PHYS_BASE | 0x804) /* PHYS */
/*
* hardware specific access to control-lines
*
* ctrl:
* NAND_NCE: bit 0 -> bit 2
* NAND_CLE: bit 1 -> bit 1
* NAND_ALE: bit 2 -> bit 0
*/
static void ts78xx_ts_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned char bits;
bits = (ctrl & NAND_NCE) << 2;
bits |= ctrl & NAND_CLE;
bits |= (ctrl & NAND_ALE) >> 2;
writeb((readb(TS_NAND_CTRL) & ~0x7) | bits, TS_NAND_CTRL);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this->IO_ADDR_W);
}
static int ts78xx_ts_nand_dev_ready(struct mtd_info *mtd)
{
return readb(TS_NAND_CTRL) & 0x20;
}
const char *ts_nand_part_probes[] = { "cmdlinepart", NULL };
static struct mtd_partition ts78xx_ts_nand_parts[] = {
{
.name = "mbr",
.offset = 0,
.size = SZ_128K,
.mask_flags = MTD_WRITEABLE,
}, {
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = SZ_4M,
}, {
.name = "initrd",
.offset = MTDPART_OFS_APPEND,
.size = SZ_4M,
}, {
.name = "rootfs",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
}
};
static struct platform_nand_data ts78xx_ts_nand_data = {
.chip = {
.part_probe_types = ts_nand_part_probes,
.partitions = ts78xx_ts_nand_parts,
.nr_partitions = ARRAY_SIZE(ts78xx_ts_nand_parts),
.chip_delay = 15,
.options = NAND_USE_FLASH_BBT,
},
.ctrl = {
/*
* The HW ECC offloading functions, used to give about a 9%
* performance increase for 'dd if=/dev/mtdblockX' and 5% for
* nanddump. This all however was changed by git commit
* e6cf5df1838c28bb060ac45b5585e48e71bbc740 so now there is
* no performance advantage to be had so we no longer bother
*/
.cmd_ctrl = ts78xx_ts_nand_cmd_ctrl,
.dev_ready = ts78xx_ts_nand_dev_ready,
},
};
static struct resource ts78xx_ts_nand_resources = {
.start = TS_NAND_DATA,
.end = TS_NAND_DATA + 4,
.flags = IORESOURCE_IO,
};
static struct platform_device ts78xx_ts_nand_device = {
.name = "gen_nand",
.id = -1,
.dev = {
.platform_data = &ts78xx_ts_nand_data,
},
.resource = &ts78xx_ts_nand_resources,
.num_resources = 1,
};
static int ts78xx_ts_nand_load(void)
{
int rc;
if (ts78xx_fpga.supports.ts_nand.init == 0) {
rc = platform_device_register(&ts78xx_ts_nand_device);
if (!rc)
ts78xx_fpga.supports.ts_nand.init = 1;
} else
rc = platform_device_add(&ts78xx_ts_nand_device);
return rc;
};
static void ts78xx_ts_nand_unload(void)
{
platform_device_del(&ts78xx_ts_nand_device);
}
/*****************************************************************************
* FPGA 'hotplug' support code
****************************************************************************/
static void ts78xx_fpga_devices_zero_init(void)
{
ts78xx_fpga.supports.ts_rtc.init = 0;
ts78xx_fpga.supports.ts_nand.init = 0;
}
static void ts78xx_fpga_supports(void)
@ -164,9 +284,11 @@ static void ts78xx_fpga_supports(void)
switch (ts78xx_fpga.id) {
case TS7800_REV_B:
ts78xx_fpga.supports.ts_rtc.present = 1;
ts78xx_fpga.supports.ts_nand.present = 1;
break;
default:
ts78xx_fpga.supports.ts_rtc.present = 0;
ts78xx_fpga.supports.ts_nand.present = 0;
}
}
@ -182,6 +304,14 @@ static int ts78xx_fpga_load_devices(void)
}
ret |= tmp;
}
if (ts78xx_fpga.supports.ts_nand.present == 1) {
tmp = ts78xx_ts_nand_load();
if (tmp) {
printk(KERN_INFO "TS-78xx: NAND not registered\n");
ts78xx_fpga.supports.ts_nand.present = 0;
}
ret |= tmp;
}
return ret;
}
@ -192,6 +322,8 @@ static int ts78xx_fpga_unload_devices(void)
if (ts78xx_fpga.supports.ts_rtc.present == 1)
ts78xx_ts_rtc_unload();
if (ts78xx_fpga.supports.ts_nand.present == 1)
ts78xx_ts_nand_unload();
return ret;
}