ARM: OMAP2+: gpmc: handle additional timings

Configure busturnaround, cycle2cycledelay, waitmonitoringtime,
clkactivationtime in gpmc_cs_set_timings(). This is done so
that boards can configure these parameters of gpmc in Kernel
instead of relying on bootloader. Also configure bool type
timings like extradelay.

This needed change to the existing users that were configuring
clk activation time and extra delay by directly writing to
registers. Thanks to Tony for making me aware of users of clk
activation and being kind enough to test the modified one.

Signed-off-by: Afzal Mohammed <afzal@ti.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index bf6117c..5619d1b 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -74,6 +74,13 @@
 #define GPMC_ECC_CTRL_ECCREG8		0x008
 #define GPMC_ECC_CTRL_ECCREG9		0x009
 
+#define	GPMC_CONFIG2_CSEXTRADELAY		BIT(7)
+#define	GPMC_CONFIG3_ADVEXTRADELAY		BIT(7)
+#define	GPMC_CONFIG4_OEEXTRADELAY		BIT(7)
+#define	GPMC_CONFIG4_WEEXTRADELAY		BIT(23)
+#define	GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN	BIT(6)
+#define	GPMC_CONFIG6_CYCLE2CYCLESAMECSEN	BIT(7)
+
 #define GPMC_CS0_OFFSET		0x60
 #define GPMC_CS_SIZE		0x30
 #define	GPMC_BCH_SIZE		0x10
@@ -223,6 +230,39 @@ unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns)
 	return ticks * gpmc_get_fclk_period() / 1000;
 }
 
+static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value)
+{
+	u32 l;
+
+	l = gpmc_cs_read_reg(cs, reg);
+	if (value)
+		l |= mask;
+	else
+		l &= ~mask;
+	gpmc_cs_write_reg(cs, reg, l);
+}
+
+static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p)
+{
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1,
+			   GPMC_CONFIG1_TIME_PARA_GRAN,
+			   p->time_para_granularity);
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2,
+			   GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay);
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3,
+			   GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay);
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
+			   GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay);
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
+			   GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay);
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
+			   GPMC_CONFIG6_CYCLE2CYCLESAMECSEN,
+			   p->cycle2cyclesamecsen);
+	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
+			   GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN,
+			   p->cycle2cyclediffcsen);
+}
+
 #ifdef DEBUG
 static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
 			       int time, const char *name)
@@ -316,6 +356,12 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
 
 	GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);
 
+	GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround);
+	GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay);
+
+	GPMC_SET_ONE(GPMC_CS_CONFIG1, 18, 19, wait_monitoring);
+	GPMC_SET_ONE(GPMC_CS_CONFIG1, 25, 26, clk_activation);
+
 	if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
 		GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
 	if (gpmc_capability & GPMC_HAS_WR_ACCESS)
@@ -335,6 +381,8 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
 		gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
 	}
 
+	gpmc_cs_bool_timings(cs, &t->bool_timings);
+
 	return 0;
 }