ARM: OMAP2+: onenand: generic timing calculation

Generic gpmc timing calculation helper is available now, use
it instead of custom timing calculation.

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

1 files changed, 43 insertions, 82 deletions

diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index 206008837294..94a349e4dc96 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -33,7 +33,6 @@
 
 static unsigned onenand_flags;
 static unsigned latency;
-static int fclk_offset;
 
 static struct omap_onenand_platform_data *gpmc_onenand_data;
 
@@ -50,6 +49,7 @@ static struct platform_device gpmc_onenand_device = {
 
 static struct gpmc_timings omap2_onenand_calc_async_timings(void)
 {
+        struct gpmc_device_timings dev_t;
         struct gpmc_timings t;
 
         const int t_cer = 15;
@@ -59,35 +59,24 @@ static struct gpmc_timings omap2_onenand_calc_async_timings(void)
         const int t_aa = 76;
         const int t_oe = 20;
         const int t_cez = 20; /* max of t_cez, t_oez */
-        const int t_ds = 30;
         const int t_wpl = 40;
         const int t_wph = 30;
 
-        memset(&t, 0, sizeof(t));
-        t.sync_clk = 0;
-        t.cs_on = 0;
-        t.adv_on = 0;
-
-        /* Read */
-        t.adv_rd_off = gpmc_round_ns_to_ticks(max_t(int, t_avdp, t_cer));
-        t.oe_on  = t.adv_rd_off + gpmc_round_ns_to_ticks(t_aavdh);
-        t.access = t.adv_on + gpmc_round_ns_to_ticks(t_aa);
-        t.access = max_t(int, t.access, t.cs_on + gpmc_round_ns_to_ticks(t_ce));
-        t.access = max_t(int, t.access, t.oe_on + gpmc_round_ns_to_ticks(t_oe));
-        t.oe_off = t.access + gpmc_round_ns_to_ticks(1);
-        t.cs_rd_off = t.oe_off;
-        t.rd_cycle  = t.cs_rd_off + gpmc_round_ns_to_ticks(t_cez);
-
-        /* Write */
-        t.adv_wr_off = t.adv_rd_off;
-        t.we_on  = t.oe_on;
-        if (cpu_is_omap34xx()) {
-                t.wr_data_mux_bus = t.we_on;
-                t.wr_access = t.we_on + gpmc_round_ns_to_ticks(t_ds);
-        }
-        t.we_off = t.we_on + gpmc_round_ns_to_ticks(t_wpl);
-        t.cs_wr_off = t.we_off + gpmc_round_ns_to_ticks(t_wph);
-        t.wr_cycle  = t.cs_wr_off + gpmc_round_ns_to_ticks(t_cez);
+        memset(&dev_t, 0, sizeof(dev_t));
+
+        dev_t.mux = true;
+        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, &dev_t);
 
         return t;
 }
@@ -173,16 +162,15 @@ static struct gpmc_timings
 omap2_onenand_calc_sync_timings(struct omap_onenand_platform_data *cfg,
                                 int freq)
 {
+        struct gpmc_device_timings dev_t;
         struct gpmc_timings t;
         const int t_cer  = 15;
         const int t_avdp = 12;
         const int t_cez  = 20; /* max of t_cez, t_oez */
-        const int t_ds   = 30;
         const int t_wpl  = 40;
         const int t_wph  = 30;
         int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo;
-        int div, fclk_offset_ns, gpmc_clk_ns;
-        int ticks_cez;
+        int div, gpmc_clk_ns;
 
         if (cfg->flags & ONENAND_SYNC_READ)
                 onenand_flags = ONENAND_FLAG_SYNCREAD;
@@ -249,62 +237,35 @@ omap2_onenand_calc_sync_timings(struct omap_onenand_platform_data *cfg,
                 latency = 4;
 
         /* Set synchronous read timings */
-        memset(&t, 0, sizeof(t));
-
-        if (div == 1) {
-                t.bool_timings.cs_extra_delay = true;
-                t.bool_timings.adv_extra_delay = true;
-                t.bool_timings.oe_extra_delay = true;
-                t.bool_timings.we_extra_delay = true;
-        }
+        memset(&dev_t, 0, sizeof(dev_t));
 
-        t.sync_clk = min_gpmc_clk_period;
-        t.cs_on = 0;
-        t.adv_on = 0;
-        fclk_offset_ns = gpmc_round_ns_to_ticks(max_t(int, t_ces, t_avds));
-        fclk_offset = gpmc_ns_to_ticks(fclk_offset_ns);
-        t.page_burst_access = gpmc_clk_ns;
-
-        /* Read */
-        t.adv_rd_off = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_avdh));
-        t.oe_on = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_ach));
-        /* Force at least 1 clk between AVD High to OE Low */
-        if (t.oe_on <= t.adv_rd_off)
-                t.oe_on = t.adv_rd_off + gpmc_round_ns_to_ticks(1);
-        t.access = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div);
-        t.oe_off = t.access + gpmc_round_ns_to_ticks(1);
-        t.cs_rd_off = t.oe_off;
-        ticks_cez = ((gpmc_ns_to_ticks(t_cez) + div - 1) / div) * div;
-        t.rd_cycle = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div +
-                     ticks_cez);
-
-        t.clk_activation = fclk_offset_ns;
-
-        /* Write */
+        dev_t.mux = true;
+        dev_t.sync_read = true;
         if (onenand_flags & ONENAND_FLAG_SYNCWRITE) {
-                t.adv_wr_off = t.adv_rd_off;
-                t.we_on  = 0;
-                t.we_off = t.cs_rd_off;
-                t.cs_wr_off = t.cs_rd_off;
-                t.wr_cycle  = t.rd_cycle;
-                if (cpu_is_omap34xx()) {
-                        t.wr_data_mux_bus = gpmc_ticks_to_ns(fclk_offset +
-                                        gpmc_ps_to_ticks(min_gpmc_clk_period +
-                                        t_rdyo * 1000));
-                        t.wr_access = t.access;
-                }
+                dev_t.sync_write = true;
         } else {
-                t.adv_wr_off = gpmc_round_ns_to_ticks(max_t(int,
-                                                        t_avdp, t_cer));
-                t.we_on  = t.adv_wr_off + gpmc_round_ns_to_ticks(t_aavdh);
-                t.we_off = t.we_on + gpmc_round_ns_to_ticks(t_wpl);
-                t.cs_wr_off = t.we_off + gpmc_round_ns_to_ticks(t_wph);
-                t.wr_cycle  = t.cs_wr_off + gpmc_round_ns_to_ticks(t_cez);
-                if (cpu_is_omap34xx()) {
-                        t.wr_data_mux_bus = t.we_on;
-                        t.wr_access = t.we_on + gpmc_round_ns_to_ticks(t_ds);
-                }
+                dev_t.t_avdp_w = max(t_avdp, t_cer) * 1000;
+                dev_t.t_wpl = t_wpl * 1000;
+                dev_t.t_wph = t_wph * 1000;
+                dev_t.t_aavdh = t_aavdh * 1000;
         }
+        dev_t.ce_xdelay = true;
+        dev_t.avd_xdelay = true;
+        dev_t.oe_xdelay = true;
+        dev_t.we_xdelay = true;
+        dev_t.clk = min_gpmc_clk_period;
+        dev_t.t_bacc = dev_t.clk;
+        dev_t.t_ces = t_ces * 1000;
+        dev_t.t_avds = t_avds * 1000;
+        dev_t.t_avdh = t_avdh * 1000;
+        dev_t.t_ach = t_ach * 1000;
+        dev_t.cyc_iaa = (latency + 1);
+        dev_t.t_cez_r = t_cez * 1000;
+        dev_t.t_cez_w = dev_t.t_cez_r;
+        dev_t.cyc_aavdh_oe = 1;
+        dev_t.t_rdyo = t_rdyo * 1000 + min_gpmc_clk_period;
+
+        gpmc_calc_timings(&t, &dev_t);
 
         return t;
 }