1 files changed, 23 insertions, 38 deletions

diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 2ac7367afe77..8beb0d0233b5 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -35,6 +35,7 @@
 #include <linux/slab.h>
 
 #include <mach/nand.h>
+#include <mach/aemif.h>
 
 #include <asm/mach-types.h>
 
@@ -74,6 +75,8 @@ struct davinci_nand_info {
         uint32_t                mask_cle;
 
         uint32_t                core_chipsel;
+
+        struct davinci_aemif_timing     *timing;
 };
 
 static DEFINE_SPINLOCK(davinci_nand_lock);
@@ -478,36 +481,6 @@ static int nand_davinci_dev_ready(struct mtd_info *mtd)
         return davinci_nand_readl(info, NANDFSR_OFFSET) & BIT(0);
 }
 
-static void __init nand_dm6446evm_flash_init(struct davinci_nand_info *info)
-{
-        uint32_t regval, a1cr;
-
-        /*
-         * NAND FLASH timings @ PLL1 == 459 MHz
-         *  - AEMIF.CLK freq   = PLL1/6 = 459/6 = 76.5 MHz
-         *  - AEMIF.CLK period = 1/76.5 MHz = 13.1 ns
-         */
-        regval = 0
-                | (0 << 31)           /* selectStrobe */
-                | (0 << 30)           /* extWait (never with NAND) */
-                | (1 << 26)           /* writeSetup      10 ns */
-                | (3 << 20)           /* writeStrobe     40 ns */
-                | (1 << 17)           /* writeHold       10 ns */
-                | (0 << 13)           /* readSetup       10 ns */
-                | (3 << 7)            /* readStrobe      60 ns */
-                | (0 << 4)            /* readHold        10 ns */
-                | (3 << 2)            /* turnAround      ?? ns */
-                | (0 << 0)            /* asyncSize       8-bit bus */
-                ;
-        a1cr = davinci_nand_readl(info, A1CR_OFFSET);
-        if (a1cr != regval) {
-                dev_dbg(info->dev, "Warning: NAND config: Set A1CR " \
-                       "reg to 0x%08x, was 0x%08x, should be done by " \
-                       "bootloader.\n", regval, a1cr);
-                davinci_nand_writel(info, A1CR_OFFSET, regval);
-        }
-}
-
 /*----------------------------------------------------------------------*/
 
 /* An ECC layout for using 4-bit ECC with small-page flash, storing
@@ -611,6 +584,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
         info->chip.options      = pdata->options;
         info->chip.bbt_td       = pdata->bbt_td;
         info->chip.bbt_md       = pdata->bbt_md;
+        info->timing            = pdata->timing;
 
         info->ioaddr            = (uint32_t __force) vaddr;
 
@@ -688,15 +662,25 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
                 goto err_clk_enable;
         }
 
-        /* EMIF timings should normally be set by the boot loader,
-         * especially after boot-from-NAND.  The *only* reason to
-         * have this special casing for the DM6446 EVM is to work
-         * with boot-from-NOR ... with CS0 manually re-jumpered
-         * (after startup) so it addresses the NAND flash, not NOR.
-         * Even for dev boards, that's unusually rude...
+        /*
+         * Setup Async configuration register in case we did not boot from
+         * NAND and so bootloader did not bother to set it up.
          */
-        if (machine_is_davinci_evm())
-                nand_dm6446evm_flash_init(info);
+        val = davinci_nand_readl(info, A1CR_OFFSET + info->core_chipsel * 4);
+
+        /* Extended Wait is not valid and Select Strobe mode is not used */
+        val &= ~(ACR_ASIZE_MASK | ACR_EW_MASK | ACR_SS_MASK);
+        if (info->chip.options & NAND_BUSWIDTH_16)
+                val |= 0x1;
+
+        davinci_nand_writel(info, A1CR_OFFSET + info->core_chipsel * 4, val);
+
+        ret = davinci_aemif_setup_timing(info->timing, info->base,
+                                                        info->core_chipsel);
+        if (ret < 0) {
+                dev_dbg(&pdev->dev, "NAND timing values setup fail\n");
+                goto err_timing;
+        }
 
         spin_lock_irq(&davinci_nand_lock);
 
@@ -809,6 +793,7 @@ syndrome_done:
         return 0;
 
 err_scan:
+err_timing:
         clk_disable(info->clk);
 
 err_clk_enable: