Helper for setting GPMC timing by taking input as register values.
Signed-off-by: Afzal Mohammed <[email protected]>
---
arch/arm/mach-omap2/gpmc.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 4e19010..e60076e3 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -960,6 +960,49 @@ static void gpmc_setup_cs_config(unsigned cs, unsigned
conf)
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
}
+static inline void gpmc_set_one_timing(int cs, int reg, int start,
+ int end, u32 val)
+{
+ u32 l;
+ unsigned mask;
+
+ mask = (1 << (end - start + 1)) - 1;
+ l = gpmc_cs_read_reg(cs, reg);
+ l &= ~(mask << start);
+ l |= val << start;
+ gpmc_cs_write_reg(cs, reg, l);
+}
+
+static void gpmc_cs_set_register_timings(int cs, const struct gpmc_timings *t)
+{
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG1, 0, 1, t->sync_clk);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG1, 18, 19, t->wait_monitoring);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG1, 25, 26, t->clk_activation);
+
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG2, 0, 3, t->cs_on);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG2, 8, 12, t->cs_rd_off);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG2, 16, 20, t->cs_wr_off);
+
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG3, 0, 3, t->adv_on);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG3, 8, 12, t->adv_rd_off);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG3, 16, 20, t->adv_wr_off);
+
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG4, 0, 3, t->oe_on);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG4, 8, 12, t->oe_off);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG4, 16, 19, t->we_on);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG4, 24, 28, t->we_off);
+
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG5, 24, 27, t->page_burst_access);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG6, 0, 3, t->bus_turnaround);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG6, 8, 11, t->cycle2cycle_delay);
+
+ if (gpmc_revision >= 4) {
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG6, 16, 19,
+ t->wr_data_mux_bus);
+ gpmc_set_one_timing(cs, GPMC_CS_CONFIG6, 24, 28, t->wr_access);
+ }
+}
+
static inline unsigned gpmc_bit_to_irq(unsigned bitmask)
{
return bitmask;
--
1.7.10.2
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