Add gpmc_cs_get_timings counterpart of gpmc_cs_set_timings and
convinience macros to read particular timing configuration fields
Signed-off-by: Mike Rapoport <m...@compulab.co.il>
---
arch/arm/mach-omap2/gpmc.c | 76 ++++++++++++++++++++++++++++++++
arch/arm/plat-omap/include/plat/gpmc.h | 1 +
2 files changed, 77 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 5bc3ca0..527a0da 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -163,6 +163,36 @@ unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns)
}
#ifdef DEBUG
+static int get_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
+ const char *name)
+#else
+static int get_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit)
+#endif
+{
+ u32 l;
+ int ticks, mask, nr_bits, time;
+
+ nr_bits = end_bit - st_bit + 1;
+ mask = ((1 << nr_bits) - 1);
+
+ l = gpmc_cs_read_reg(cs, reg);
+ ticks = (l >> st_bit) & mask;
+
+ if (ticks == 0)
+ time = 0;
+ else
+ time = gpmc_ticks_to_ns(ticks);
+
+#ifdef DEBUG
+ printk(KERN_INFO
+ "GPMC CS%d: %-10s: %3d ticks, %3d ns\n",
+ cs, name, ticks, time);
+#endif
+
+ return time;
+}
+
+#ifdef DEBUG
static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
int time, const char *name)
#else
@@ -206,10 +236,14 @@ static int set_gpmc_timing_reg(int cs, int reg, int
st_bit, int end_bit,
if (set_gpmc_timing_reg(cs, (reg), (st), (end), \
t->field, #field) < 0) \
return -1
+#define GPMC_GET_ONE(reg, st, end, field) \
+ t->field = get_gpmc_timing_reg(cs, (reg), (st), (end), #field)
#else
#define GPMC_SET_ONE(reg, st, end, field) \
if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \
return -1
+#define GPMC_GET_ONE(reg, st, end, field) \
+ t->field = get_gpmc_timing_reg(cs, (reg), (st), (end))
#endif
int gpmc_cs_calc_divider(int cs, unsigned int sync_clk)
@@ -227,6 +261,48 @@ int gpmc_cs_calc_divider(int cs, unsigned int sync_clk)
return div;
}
+void gpmc_cs_get_timings(int cs, struct gpmc_timings *t)
+{
+ int div;
+ u32 l;
+
+ GPMC_GET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on);
+ GPMC_GET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off);
+ GPMC_GET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off);
+
+ GPMC_GET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on);
+ GPMC_GET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off);
+ GPMC_GET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off);
+
+ GPMC_GET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on);
+ GPMC_GET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off);
+ GPMC_GET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on);
+ GPMC_GET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off);
+
+ GPMC_GET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle);
+ GPMC_GET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle);
+ GPMC_GET_ONE(GPMC_CS_CONFIG5, 16, 20, access);
+
+ GPMC_GET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);
+
+ if (cpu_is_omap34xx()) {
+ GPMC_GET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
+ GPMC_GET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);
+ }
+
+ l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+ if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) {
+ div = (l & 0x03) + 1;
+#ifdef DEBUG
+ printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n",
+ cs, (div * gpmc_get_fclk_period()) / 1000, div);
+#endif
+ t->sync_clk = (div * gpmc_get_fclk_period()) / 1000;
+ } else {
+ t->sync_clk = 0;
+ }
+}
+
int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
{
int div;
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h
b/arch/arm/plat-omap/include/plat/gpmc.h
index 145838a..5c345f1 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -102,6 +102,7 @@ extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
extern u32 gpmc_cs_read_reg(int cs, int idx);
extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
+extern void gpmc_cs_get_timings(int cs, struct gpmc_timings *t);
extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
extern void gpmc_cs_free(int cs);
extern int gpmc_cs_set_reserved(int cs, int reserved);
--
1.6.6.2
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