diff options
Diffstat (limited to 'arch/arm/mach-omap2/gpmc-onenand.c')
| -rw-r--r-- | arch/arm/mach-omap2/gpmc-onenand.c | 121 |
1 files changed, 41 insertions, 80 deletions
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c index 20600883729..94a349e4dc9 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; + memset(&dev_t, 0, sizeof(dev_t)); - /* 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); + 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; - /* 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); + 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; - } - - 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; + memset(&dev_t, 0, sizeof(dev_t)); - /* 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; } |