Onenand device operates in Asynchronous mode by default. So
configure GPMC settings/timings based on Async mode before the onenand
device is created.
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
---
arch/arm/mach-omap2/gpmc-onenand.c | 66 ++++++++++++++++++--------------------
1 file changed, 32 insertions(+), 34 deletions(-)
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index 8b6876c..bed8efe 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -61,9 +61,8 @@ static struct gpmc_settings onenand_sync = {
.wait_pin = 0,
};
-static void omap2_onenand_calc_async_timings(struct gpmc_timings *t)
+static void omap2_onenand_get_async_timings(struct gpmc_device_timings *dev_t)
{
- struct gpmc_device_timings dev_t;
const int t_cer = 15;
const int t_avdp = 12;
const int t_aavdh = 7;
@@ -74,20 +73,18 @@ static void omap2_onenand_calc_async_timings(struct gpmc_timings *t)
const int t_wpl = 40;
const int t_wph = 30;
- memset(&dev_t, 0, sizeof(dev_t));
-
- dev_t.t_avdp_r = max_t(int, t_avdp, t_cer) * 1000;
- dev_t.t_avdp_w = dev_t.t_avdp_r;
- dev_t.t_aavdh = t_aavdh * 1000;
- dev_t.t_aa = t_aa * 1000;
- dev_t.t_ce = t_ce * 1000;
- dev_t.t_oe = t_oe * 1000;
- dev_t.t_cez_r = t_cez * 1000;
- dev_t.t_cez_w = dev_t.t_cez_r;
- dev_t.t_wpl = t_wpl * 1000;
- dev_t.t_wph = t_wph * 1000;
-
- gpmc_calc_timings(t, &onenand_async, &dev_t);
+ memset(dev_t, 0, sizeof(*dev_t));
+
+ dev_t->t_avdp_r = max_t(int, t_avdp, t_cer) * 1000;
+ dev_t->t_avdp_w = dev_t->t_avdp_r;
+ dev_t->t_aavdh = t_aavdh * 1000;
+ dev_t->t_aa = t_aa * 1000;
+ dev_t->t_ce = t_ce * 1000;
+ dev_t->t_oe = t_oe * 1000;
+ dev_t->t_cez_r = t_cez * 1000;
+ dev_t->t_cez_w = dev_t->t_cez_r;
+ dev_t->t_wpl = t_wpl * 1000;
+ dev_t->t_wph = t_wph * 1000;
}
static void omap2_onenand_set_async_mode(void __iomem *onenand_base)
@@ -267,9 +264,10 @@ static void omap2_onenand_calc_sync_timings(struct gpmc_timings *t,
gpmc_calc_timings(t, &onenand_sync, &dev_t);
}
-static int omap2_onenand_setup_async(void __iomem *onenand_base)
+static int omap2_onenand_setup_async(void)
{
- struct gpmc_timings t;
+ struct gpmc_timings gpmc_t;
+ struct gpmc_device_timings dev_t;
int ret;
if (gpmc_onenand_data->of_node) {
@@ -286,19 +284,14 @@ static int omap2_onenand_setup_async(void __iomem *onenand_base)
}
}
- omap2_onenand_set_async_mode(onenand_base);
-
- omap2_onenand_calc_async_timings(&t);
-
ret = gpmc_cs_program_settings(gpmc_onenand_data->cs, &onenand_async);
if (ret < 0)
return ret;
- ret = gpmc_cs_set_timings(gpmc_onenand_data->cs, &t);
- if (ret < 0)
- return ret;
-
- omap2_onenand_set_async_mode(onenand_base);
+ omap2_onenand_get_async_timings(&dev_t);
+ gpmc_calc_timings(&gpmc_t, &onenand_async, &dev_t);
+ if (gpmc_cs_set_timings(gpmc_onenand_data->cs, &gpmc_t))
+ return -EINVAL;
return 0;
}
@@ -349,11 +342,7 @@ static int gpmc_onenand_setup(void __iomem *onenand_base, int *freq_ptr)
unsigned l = ONENAND_SYNC_READ | ONENAND_SYNC_READWRITE;
int ret;
- ret = omap2_onenand_setup_async(onenand_base);
- if (ret) {
- dev_err(dev, "unable to set to async mode\n");
- return ret;
- }
+ omap2_onenand_set_async_mode(onenand_base);
if (!(gpmc_onenand_data->flags & l))
return 0;
@@ -396,9 +385,18 @@ void gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
gpmc_onenand_resource.end = gpmc_onenand_resource.start +
ONENAND_IO_SIZE - 1;
+ if (omap2_onenand_setup_async()) {
+ pr_err("%s: Failed to setup ASYNC timings\n", __func__);
+ goto fail;
+ }
+
if (platform_device_register(&gpmc_onenand_device) < 0) {
dev_err(dev, "Unable to register OneNAND device\n");
- gpmc_cs_free(gpmc_onenand_data->cs);
- return;
+ goto fail;
}
+
+ return;
+
+fail:
+ gpmc_cs_free(gpmc_onenand_data->cs);
}
--
1.8.3.2
--
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