From: Wolfgang Grandegger <w...@grandegger.com>
For the NAND chips on the TQM8548 modules, a special chip-select logic is
used. It uses dedicated address lines to be set via UPM machine address
register (mar). This patch also adds that support to the FSL-UPM driver.
Signed-off-by: Wolfgang Grandegger <w...@grandegger.com>
---
arch/powerpc/sysdev/fsl_lbc.c | 2 +-
drivers/mtd/nand/fsl_upm.c | 13 ++++++++++++-
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/sysdev/fsl_lbc.c b/arch/powerpc/sysdev/fsl_lbc.c
index 0494ee5..dceb8d1 100644
--- a/arch/powerpc/sysdev/fsl_lbc.c
+++ b/arch/powerpc/sysdev/fsl_lbc.c
@@ -150,7 +150,7 @@ int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem
*io_base, u32 mar)
spin_lock_irqsave(&fsl_lbc_lock, flags);
- out_be32(&fsl_lbc_regs->mar, mar << (32 - upm->width));
+ out_be32(&fsl_lbc_regs->mar, mar);
switch (upm->width) {
case 8:
diff --git a/drivers/mtd/nand/fsl_upm.c b/drivers/mtd/nand/fsl_upm.c
index ca7e85a..f42955c 100644
--- a/drivers/mtd/nand/fsl_upm.c
+++ b/drivers/mtd/nand/fsl_upm.c
@@ -37,6 +37,7 @@ struct fsl_upm_nand {
struct fsl_upm upm;
uint8_t upm_addr_offset;
uint8_t upm_cmd_offset;
+ uint32_t upm_mar_chip_offset;
void __iomem *io_base;
int rnb_gpio[FSL_UPM_NAND_MAX_CHIPS];
int chip_delay;
@@ -74,7 +75,9 @@ static void fun_wait_rnb(struct fsl_upm_nand *fun)
static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
+ struct nand_chip *chip = mtd->priv;
struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd);
+ u32 mar;
if (!(ctrl & fun->last_ctrl)) {
fsl_upm_end_pattern(&fun->upm);
@@ -92,7 +95,11 @@ static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
fsl_upm_start_pattern(&fun->upm, fun->upm_cmd_offset);
}
- fsl_upm_run_pattern(&fun->upm, fun->io_base, cmd);
+ mar = cmd << (32 - fun->upm.width);
+ if (fun->upm_mar_chip_offset && fun->chip_number > 0) {
+ mar |= fun->chip_number * fun->upm_mar_chip_offset;
+ }
+ fsl_upm_run_pattern(&fun->upm, chip->IO_ADDR_R, mar);
fun_wait_rnb(fun);
}
@@ -244,6 +251,10 @@ static int __devinit fun_probe(struct of_device *ofdev,
}
fun->upm_cmd_offset = *prop;
+ prop = of_get_property(ofdev->node, "fsl,upm-mar-chip-offset", &size);
+ if (prop && size == sizeof(uint32_t))
+ fun->upm_mar_chip_offset = *prop;
+
prop = of_get_property(ofdev->node, "max-chips", &size);
if (prop && size == sizeof(uint32_t)) {
fun->max_chips = *prop;
--
1.6.0.6
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