diff options
| -rw-r--r-- | arch/arm/mach-omap2/gpmc-onenand.c | 23 | ||||
| -rw-r--r-- | include/linux/mtd/onenand_regs.h | 1 |
2 files changed, 18 insertions, 6 deletions
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c index 3a7d25fb00ef..3a4307b8f7cf 100644 --- a/arch/arm/mach-omap2/gpmc-onenand.c +++ b/arch/arm/mach-omap2/gpmc-onenand.c @@ -94,7 +94,7 @@ static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base) } static void set_onenand_cfg(void __iomem *onenand_base, int latency, - int sync_read, int sync_write, int hf) + int sync_read, int sync_write, int hf, int vhf) { u32 reg; @@ -114,6 +114,10 @@ static void set_onenand_cfg(void __iomem *onenand_base, int latency, reg |= ONENAND_SYS_CFG1_HF; else reg &= ~ONENAND_SYS_CFG1_HF; + if (vhf) + reg |= ONENAND_SYS_CFG1_VHF; + else + reg &= ~ONENAND_SYS_CFG1_VHF; writew(reg, onenand_base + ONENAND_REG_SYS_CFG1); } @@ -130,7 +134,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, const int t_wph = 30; int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo; int tick_ns, div, fclk_offset_ns, fclk_offset, gpmc_clk_ns, latency; - int first_time = 0, hf = 0, sync_read = 0, sync_write = 0; + int first_time = 0, hf = 0, vhf = 0, sync_read = 0, sync_write = 0; int err, ticks_cez; int cs = cfg->cs; u32 reg; @@ -180,7 +184,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, t_avdh = 2; t_ach = 3; t_aavdh = 6; - t_rdyo = 9; + t_rdyo = 6; break; case 83: min_gpmc_clk_period = 12000; /* 83 MHz */ @@ -217,7 +221,11 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, gpmc_clk_ns = gpmc_ticks_to_ns(div); if (gpmc_clk_ns < 15) /* >66Mhz */ hf = 1; - if (hf) + if (gpmc_clk_ns < 12) /* >83Mhz */ + vhf = 1; + if (vhf) + latency = 8; + else if (hf) latency = 6; else if (gpmc_clk_ns >= 25) /* 40 MHz*/ latency = 3; @@ -226,7 +234,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, if (first_time) set_onenand_cfg(onenand_base, latency, - sync_read, sync_write, hf); + sync_read, sync_write, hf, vhf); if (div == 1) { reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2); @@ -264,6 +272,9 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, /* 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; @@ -317,7 +328,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, if (err) return err; - set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf); + set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf, vhf); return 0; } diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h index cd6f3b431195..d60130f88eed 100644 --- a/include/linux/mtd/onenand_regs.h +++ b/include/linux/mtd/onenand_regs.h @@ -168,6 +168,7 @@ #define ONENAND_SYS_CFG1_INT (1 << 6) #define ONENAND_SYS_CFG1_IOBE (1 << 5) #define ONENAND_SYS_CFG1_RDY_CONF (1 << 4) +#define ONENAND_SYS_CFG1_VHF (1 << 3) #define ONENAND_SYS_CFG1_HF (1 << 2) #define ONENAND_SYS_CFG1_SYNC_WRITE (1 << 1) |