[MTD] [NAND] Resume method for CAFÉ NAND controller

Originally from Marcelo; modified to put the original timing registers
back instead of 0xFFFFFFFF.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 39 insertions, 3 deletions

diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c
index 0b3f840b6cbe..e2832d0b9899 100644
--- a/drivers/mtd/nand/cafe_nand.c
+++ b/drivers/mtd/nand/cafe_nand.c
@@ -827,15 +827,51 @@ static struct pci_device_id cafe_nand_tbl[] = {
 
 MODULE_DEVICE_TABLE(pci, cafe_nand_tbl);
 
+static int cafe_nand_resume(struct pci_dev *pdev)
+{
+        uint32_t ctrl;
+        struct mtd_info *mtd = pci_get_drvdata(pdev);
+        struct cafe_priv *cafe = mtd->priv;
+
+       /* Start off by resetting the NAND controller completely */
+        cafe_writel(cafe, 1, NAND_RESET);
+        cafe_writel(cafe, 0, NAND_RESET);
+        cafe_writel(cafe, 0xffffffff, NAND_IRQ_MASK);
+
+        /* Restore timing configuration */
+        cafe_writel(cafe, timing[0], NAND_TIMING1);
+        cafe_writel(cafe, timing[1], NAND_TIMING2);
+        cafe_writel(cafe, timing[2], NAND_TIMING3);
+
+        /* Disable master reset, enable NAND clock */
+        ctrl = cafe_readl(cafe, GLOBAL_CTRL);
+        ctrl &= 0xffffeff0;
+        ctrl |= 0x00007000;
+        cafe_writel(cafe, ctrl | 0x05, GLOBAL_CTRL);
+        cafe_writel(cafe, ctrl | 0x0a, GLOBAL_CTRL);
+        cafe_writel(cafe, 0, NAND_DMA_CTRL);
+        cafe_writel(cafe, 0x7006, GLOBAL_CTRL);
+        cafe_writel(cafe, 0x700a, GLOBAL_CTRL);
+
+        /* Set up DMA address */
+        cafe_writel(cafe, cafe->dmaaddr & 0xffffffff, NAND_DMA_ADDR0);
+        if (sizeof(cafe->dmaaddr) > 4)
+        /* Shift in two parts to shut the compiler up */
+                cafe_writel(cafe, (cafe->dmaaddr >> 16) >> 16, NAND_DMA_ADDR1);
+        else
+                cafe_writel(cafe, 0, NAND_DMA_ADDR1);
+
+        /* Enable NAND IRQ in global IRQ mask register */
+        cafe_writel(cafe, 0x80000007, GLOBAL_IRQ_MASK);
+        return 0;
+}
+
 static struct pci_driver cafe_nand_pci_driver = {
         .name = "CAFÉ NAND",
         .id_table = cafe_nand_tbl,
         .probe = cafe_nand_probe,
         .remove = __devexit_p(cafe_nand_remove),
-#ifdef CONFIG_PMx
-        .suspend = cafe_nand_suspend,
         .resume = cafe_nand_resume,
-#endif
 };
 
 static int cafe_nand_init(void)