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-rw-r--r--arch/arm/mach-pxa/balloon3.c51
-rw-r--r--arch/arm/mach-pxa/include/mach/balloon3.h2
2 files changed, 31 insertions, 22 deletions
diff --git a/arch/arm/mach-pxa/balloon3.c b/arch/arm/mach-pxa/balloon3.c
index adb8e9f355d1..d4649c0e23f6 100644
--- a/arch/arm/mach-pxa/balloon3.c
+++ b/arch/arm/mach-pxa/balloon3.c
@@ -567,27 +567,29 @@ static inline void balloon3_i2c_init(void) {}
* NAND
******************************************************************************/
#if defined(CONFIG_MTD_NAND_PLATFORM)||defined(CONFIG_MTD_NAND_PLATFORM_MODULE)
-static uint16_t balloon3_ctl =
- BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
- BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3 |
- BALLOON3_NAND_CONTROL_FLWP;
-
static void balloon3_nand_cmd_ctl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
+ uint8_t balloon3_ctl_set = 0, balloon3_ctl_clr = 0;
if (ctrl & NAND_CTRL_CHANGE) {
if (ctrl & NAND_CLE)
- balloon3_ctl |= BALLOON3_NAND_CONTROL_FLCLE;
+ balloon3_ctl_set |= BALLOON3_NAND_CONTROL_FLCLE;
else
- balloon3_ctl &= ~BALLOON3_NAND_CONTROL_FLCLE;
+ balloon3_ctl_clr |= BALLOON3_NAND_CONTROL_FLCLE;
if (ctrl & NAND_ALE)
- balloon3_ctl |= BALLOON3_NAND_CONTROL_FLALE;
+ balloon3_ctl_set |= BALLOON3_NAND_CONTROL_FLALE;
else
- balloon3_ctl &= ~BALLOON3_NAND_CONTROL_FLALE;
-
- __raw_writel(balloon3_ctl, BALLOON3_NAND_CONTROL_REG);
+ balloon3_ctl_clr |= BALLOON3_NAND_CONTROL_FLALE;
+
+ if (balloon3_ctl_clr)
+ __raw_writel(balloon3_ctl_clr,
+ BALLOON3_NAND_CONTROL_REG);
+ if (balloon3_ctl_set)
+ __raw_writel(balloon3_ctl_set,
+ BALLOON3_NAND_CONTROL_REG |
+ BALLOON3_FPGA_SETnCLR);
}
if (cmd != NAND_CMD_NONE)
@@ -599,15 +601,15 @@ static void balloon3_nand_select_chip(struct mtd_info *mtd, int chip)
if (chip < 0 || chip > 3)
return;
- balloon3_ctl |= BALLOON3_NAND_CONTROL_FLCE0 |
- BALLOON3_NAND_CONTROL_FLCE1 |
- BALLOON3_NAND_CONTROL_FLCE2 |
- BALLOON3_NAND_CONTROL_FLCE3;
+ /* Assert all nCE lines */
+ __raw_writew(
+ BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
+ BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3,
+ BALLOON3_NAND_CONTROL_REG | BALLOON3_FPGA_SETnCLR);
/* Deassert correct nCE line */
- balloon3_ctl &= ~(BALLOON3_NAND_CONTROL_FLCE0 << chip);
-
- __raw_writew(balloon3_ctl, BALLOON3_NAND_CONTROL_REG);
+ __raw_writew(BALLOON3_NAND_CONTROL_FLCE0 << chip,
+ BALLOON3_NAND_CONTROL_REG);
}
static int balloon3_nand_probe(struct platform_device *pdev)
@@ -616,11 +618,12 @@ static int balloon3_nand_probe(struct platform_device *pdev)
uint16_t ver;
int ret;
- __raw_writew(BALLOON3_NAND_CONTROL2_16BIT, BALLOON3_NAND_CONTROL2_REG);
+ __raw_writew(BALLOON3_NAND_CONTROL2_16BIT,
+ BALLOON3_NAND_CONTROL2_REG | BALLOON3_FPGA_SETnCLR);
ver = __raw_readw(BALLOON3_FPGA_VER);
- if (ver > 0x0201)
- pr_warn("The FPGA code, version 0x%04x, is newer than rel-0.3. "
+ if (ver < 0x4f08)
+ pr_warn("The FPGA code, version 0x%04x, is too old. "
"NAND support might be broken in this version!", ver);
/* Power up the NAND chips */
@@ -635,7 +638,11 @@ static int balloon3_nand_probe(struct platform_device *pdev)
gpio_set_value(BALLOON3_GPIO_RUN_NAND, 1);
/* Deassert all nCE lines and write protect line */
- __raw_writel(balloon3_ctl, BALLOON3_NAND_CONTROL_REG);
+ __raw_writel(
+ BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
+ BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3 |
+ BALLOON3_NAND_CONTROL_FLWP,
+ BALLOON3_NAND_CONTROL_REG | BALLOON3_FPGA_SETnCLR);
return 0;
err2:
diff --git a/arch/arm/mach-pxa/include/mach/balloon3.h b/arch/arm/mach-pxa/include/mach/balloon3.h
index 3506da1f27bb..f6c81ea51487 100644
--- a/arch/arm/mach-pxa/include/mach/balloon3.h
+++ b/arch/arm/mach-pxa/include/mach/balloon3.h
@@ -26,6 +26,8 @@ enum balloon3_features {
#define BALLOON3_FPGA_VIRT (0xf1000000) /* as per balloon2 */
#define BALLOON3_FPGA_LENGTH 0x01000000
+#define BALLOON3_FPGA_SETnCLR (0x1000)
+
/* FPGA / CPLD registers for CF socket */
#define BALLOON3_CF_STATUS_REG (BALLOON3_FPGA_VIRT + 0x00e00008)
#define BALLOON3_CF_CONTROL_REG (BALLOON3_FPGA_VIRT + 0x00e00008)