diff options
Diffstat (limited to 'target/linux/lantiq/patches-4.14/0018-MTD-nand-lots-of-xrx200-fixes.patch')
| -rw-r--r-- | target/linux/lantiq/patches-4.14/0018-MTD-nand-lots-of-xrx200-fixes.patch | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/target/linux/lantiq/patches-4.14/0018-MTD-nand-lots-of-xrx200-fixes.patch b/target/linux/lantiq/patches-4.14/0018-MTD-nand-lots-of-xrx200-fixes.patch deleted file mode 100644 index b97967d20e..0000000000 --- a/target/linux/lantiq/patches-4.14/0018-MTD-nand-lots-of-xrx200-fixes.patch +++ /dev/null @@ -1,122 +0,0 @@ -From 997a8965db8417266bea3fbdcfa3e5655a1b52fa Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Tue, 9 Sep 2014 23:12:15 +0200 -Subject: [PATCH 18/36] MTD: nand: lots of xrx200 fixes - -Signed-off-by: John Crispin <blogic@openwrt.org> ---- - drivers/mtd/nand/xway_nand.c | 63 ++++++++++++++++++++++++++++++++++++++++++ - 1 file changed, 63 insertions(+) - ---- a/drivers/mtd/nand/xway_nand.c -+++ b/drivers/mtd/nand/xway_nand.c -@@ -63,6 +63,24 @@ - #define NAND_CON_CSMUX (1 << 1) - #define NAND_CON_NANDM 1 - -+#define DANUBE_PCI_REG32( addr ) (*(volatile u32 *)(addr)) -+#define PCI_CR_PR_OFFSET (KSEG1+0x1E105400) -+#define PCI_CR_PC_ARB (PCI_CR_PR_OFFSET + 0x0080) -+ -+/* -+ * req_mask provides a mechanism to prevent interference between -+ * nand and pci (probably only relevant for the BT Home Hub 2B). -+ * Setting it causes the corresponding pci req pins to be masked -+ * during nand access, and also moves ebu locking from the read/write -+ * functions to the chip select function to ensure that the whole -+ * operation runs with interrupts disabled. -+ * In addition it switches on some extra waiting in xway_cmd_ctrl(). -+ * This seems to be necessary if the ebu_cs1 pin has open-drain disabled, -+ * which in turn seems to be necessary for the nor chip to be recognised -+ * reliably, on a board (Home Hub 2B again) which has both nor and nand. -+ */ -+static __be32 req_mask = 0; -+ - struct xway_nand_data { - struct nand_chip chip; - unsigned long csflags; -@@ -94,10 +112,22 @@ static void xway_select_chip(struct mtd_ - case -1: - ltq_ebu_w32_mask(NAND_CON_CE, 0, EBU_NAND_CON); - ltq_ebu_w32_mask(NAND_CON_NANDM, 0, EBU_NAND_CON); -+ -+ if (req_mask) { -+ /* Unmask all external PCI request */ -+ DANUBE_PCI_REG32(PCI_CR_PC_ARB) &= ~(req_mask << 16); -+ } -+ - spin_unlock_irqrestore(&ebu_lock, data->csflags); - break; - case 0: - spin_lock_irqsave(&ebu_lock, data->csflags); -+ -+ if (req_mask) { -+ /* Mask all external PCI request */ -+ DANUBE_PCI_REG32(PCI_CR_PC_ARB) |= (req_mask << 16); -+ } -+ - ltq_ebu_w32_mask(0, NAND_CON_NANDM, EBU_NAND_CON); - ltq_ebu_w32_mask(0, NAND_CON_CE, EBU_NAND_CON); - break; -@@ -108,6 +138,12 @@ static void xway_select_chip(struct mtd_ - - static void xway_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) - { -+ -+ if (req_mask) { -+ if (cmd != NAND_CMD_STATUS) -+ ltq_ebu_w32(0, EBU_NAND_WAIT); /* Clear nand ready */ -+ } -+ - if (cmd == NAND_CMD_NONE) - return; - -@@ -118,6 +154,24 @@ static void xway_cmd_ctrl(struct mtd_inf - - while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0) - ; -+ -+ if (req_mask) { -+ /* -+ * program and erase have their own busy handlers -+ * status and sequential in needs no delay -+ */ -+ switch (cmd) { -+ case NAND_CMD_ERASE1: -+ case NAND_CMD_SEQIN: -+ case NAND_CMD_STATUS: -+ case NAND_CMD_READID: -+ return; -+ } -+ -+ /* wait until command is processed */ -+ while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_RD) == 0) -+ ; -+ } - } - - static int xway_dev_ready(struct mtd_info *mtd) -@@ -157,6 +211,7 @@ static int xway_nand_probe(struct platfo - int err; - u32 cs; - u32 cs_flag = 0; -+ const __be32 *req_mask_ptr; - - /* Allocate memory for the device structure (and zero it) */ - data = devm_kzalloc(&pdev->dev, sizeof(struct xway_nand_data), -@@ -192,6 +247,15 @@ static int xway_nand_probe(struct platfo - if (!err && cs == 1) - cs_flag = NAND_CON_IN_CS1 | NAND_CON_OUT_CS1; - -+ req_mask_ptr = of_get_property(pdev->dev.of_node, -+ "req-mask", NULL); -+ -+ /* -+ * Load the PCI req lines to mask from the device tree. If the -+ * property is not present, setting req_mask to 0 disables masking. -+ */ -+ req_mask = (req_mask_ptr ? *req_mask_ptr : 0); -+ - /* setup the EBU to run in NAND mode on our base addr */ - ltq_ebu_w32(CPHYSADDR(data->nandaddr) - | ADDSEL1_MASK(3) | ADDSEL1_REGEN, EBU_ADDSEL1); |