Allow disabling sync read and write based on flags
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/mach-omap2/board-n800.c | 1 +
arch/arm/mach-omap2/board-rx51-peripherals.c | 1 +
arch/arm/mach-omap2/gpmc-onenand.c | 43 ++++++++++++++++++--------
arch/arm/plat-omap/include/mach/onenand.h | 4 ++
4 files changed, 36 insertions(+), 13 deletions(-)
diff --git a/arch/arm/mach-omap2/board-n800.c b/arch/arm/mach-omap2/board-n800.c
index e882e4b..74e7ea4 100644
--- a/arch/arm/mach-omap2/board-n800.c
+++ b/arch/arm/mach-omap2/board-n800.c
@@ -722,6 +722,7 @@ static struct omap_onenand_platform_data board_onenand_data = {
.gpio_irq = 26,
.parts = onenand_partitions,
.nr_parts = ARRAY_SIZE(onenand_partitions),
+ .flags = ONENAND_SYNC_READ,
};
static void __init board_onenand_init(void)
diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c
index 7b1ee3d..55e8568 100644
--- a/arch/arm/mach-omap2/board-rx51-peripherals.c
+++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -515,6 +515,7 @@ static struct omap_onenand_platform_data board_onenand_data = {
.gpio_irq = 65,
.parts = onenand_partitions,
.nr_parts = ARRAY_SIZE(onenand_partitions),
+ .flags = ONENAND_SYNC_READWRITE,
};
static void __init board_onenand_init(void)
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index fc79183..d243228 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -86,15 +86,18 @@ static void omap2_onenand_writew(unsigned short value, void __iomem *addr)
}
static void set_onenand_cfg(void __iomem *onenand_base, int latency,
- int sync_write, int hf)
+ int sync_read, int sync_write, int hf)
{
u32 reg;
reg = omap2_onenand_readw(onenand_base + ONENAND_REG_SYS_CFG1);
reg &= ~((0x7 << ONENAND_SYS_CFG1_BRL_SHIFT) | (0x7 << 9));
reg |= (latency << ONENAND_SYS_CFG1_BRL_SHIFT) |
- ONENAND_SYS_CFG1_SYNC_READ |
ONENAND_SYS_CFG1_BL_16;
+ if (sync_read)
+ reg |= ONENAND_SYS_CFG1_SYNC_READ;
+ else
+ reg &= ~ONENAND_SYS_CFG1_SYNC_READ;
if (sync_write)
reg |= ONENAND_SYS_CFG1_SYNC_WRITE;
else
@@ -106,8 +109,9 @@ static void set_onenand_cfg(void __iomem *onenand_base, int latency,
omap2_onenand_writew(reg, onenand_base + ONENAND_REG_SYS_CFG1);
}
-static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
- int freq)
+static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg,
+ void __iomem *onenand_base,
+ int freq)
{
struct gpmc_timings t;
const int t_cer = 15;
@@ -118,9 +122,17 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
const int t_wph = 30;
int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo;
int tick_ns, div, fclk_offset_ns, fclk_offset, gpmc_clk_ns, latency;
- int err, ticks_cez, sync_write = 0, first_time = 0, hf = 0;
+ int err, ticks_cez, sync_read = 0, sync_write = 0, first_time = 0, hf = 0;
+ int cs = cfg->cs;
u32 reg;
+ if (cfg->flags & ONENAND_SYNC_READ) {
+ sync_read = 1;
+ } else if (cfg->flags & ONENAND_SYNC_READWRITE) {
+ sync_read = 1;
+ sync_write = 1;
+ }
+
if (!freq) {
/* Very first call freq is not known */
err = omap2_onenand_set_async_mode(cs, onenand_base);
@@ -160,8 +172,6 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
t_ach = 6;
t_aavdh = 6;
t_rdyo = 9;
- if (cpu_is_omap34xx())
- sync_write = 1;
break;
case 66:
min_gpmc_clk_period = 15; /* 66 MHz */
@@ -171,8 +181,6 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
t_ach = 6;
t_aavdh = 6;
t_rdyo = 11;
- if (cpu_is_omap34xx())
- sync_write = 1;
break;
default:
min_gpmc_clk_period = 18; /* 54 MHz */
@@ -182,6 +190,7 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
t_ach = 9;
t_aavdh = 7;
t_rdyo = 15;
+ sync_write = 0;
break;
}
@@ -198,7 +207,8 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
latency = 4;
if (first_time)
- set_onenand_cfg(onenand_base, latency, sync_write, hf);
+ set_onenand_cfg(onenand_base, latency,
+ sync_read, sync_write, hf);
if (div == 1) {
reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2);
@@ -272,7 +282,7 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1,
GPMC_CONFIG1_WRAPBURST_SUPP |
GPMC_CONFIG1_READMULTIPLE_SUPP |
- GPMC_CONFIG1_READTYPE_SYNC |
+ (sync_read ? GPMC_CONFIG1_READTYPE_SYNC : 0) |
(sync_write ? GPMC_CONFIG1_WRITEMULTIPLE_SUPP : 0) |
(sync_write ? GPMC_CONFIG1_WRITETYPE_SYNC : 0) |
GPMC_CONFIG1_CLKACTIVATIONTIME(fclk_offset) |
@@ -288,7 +298,7 @@ static int omap2_onenand_set_sync_mode(int cs, void __iomem *onenand_base,
if (err)
return err;
- set_onenand_cfg(onenand_base, latency, sync_write, hf);
+ set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf);
return 0;
}
@@ -298,7 +308,7 @@ static int gpmc_onenand_setup(void __iomem *onenand_base, int freq)
struct device *dev = &gpmc_onenand_device.dev;
/* Set sync timings in GPMC */
- if (omap2_onenand_set_sync_mode(gpmc_onenand_data->cs, onenand_base,
+ if (omap2_onenand_set_sync_mode(gpmc_onenand_data, onenand_base,
freq) < 0) {
dev_err(dev, "Unable to set synchronous mode\n");
return -EINVAL;
@@ -313,6 +323,13 @@ void __init gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
gpmc_onenand_data->onenand_setup = gpmc_onenand_setup;
gpmc_onenand_device.dev.platform_data = gpmc_onenand_data;
+ if (cpu_is_omap24xx() &&
+ (gpmc_onenand_data->flags & ONENAND_SYNC_READWRITE)) {
+ printk(KERN_ERR "Onenand using only SYNC_READ on 24xx\n");
+ gpmc_onenand_data->flags &= ~ONENAND_SYNC_READWRITE;
+ gpmc_onenand_data->flags |= ONENAND_SYNC_READ;
+ }
+
if (platform_device_register(&gpmc_onenand_device) < 0) {
printk(KERN_ERR "Unable to register OneNAND device\n");
return;
diff --git a/arch/arm/plat-omap/include/mach/onenand.h b/arch/arm/plat-omap/include/mach/onenand.h
index 2a391fa..bb66d0b 100644
--- a/arch/arm/plat-omap/include/mach/onenand.h
+++ b/arch/arm/plat-omap/include/mach/onenand.h
@@ -14,6 +14,9 @@
#ifndef __ASM_ARCH_OMAP_ONENAND_H__
+#define ONENAND_SYNC_READ (1 << 0)
+#define ONENAND_SYNC_READWRITE (1 << 1)
+
struct omap_onenand_platform_data {
int cs;
int gpio_irq;
@@ -21,6 +24,7 @@ struct omap_onenand_platform_data {
int nr_parts;
int (*onenand_setup)(void __iomem *, int freq);
int dma_channel;
+ u8 flags;
};
int omap2_onenand_rephase(void);
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
