summaryrefslogtreecommitdiff
path: root/target/linux/lantiq/patches-3.0/0016-MIPS-lantiq-adds-xway-nand-driver.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/lantiq/patches-3.0/0016-MIPS-lantiq-adds-xway-nand-driver.patch')
-rw-r--r--target/linux/lantiq/patches-3.0/0016-MIPS-lantiq-adds-xway-nand-driver.patch267
1 files changed, 267 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.0/0016-MIPS-lantiq-adds-xway-nand-driver.patch b/target/linux/lantiq/patches-3.0/0016-MIPS-lantiq-adds-xway-nand-driver.patch
new file mode 100644
index 0000000000..444e9a71c8
--- /dev/null
+++ b/target/linux/lantiq/patches-3.0/0016-MIPS-lantiq-adds-xway-nand-driver.patch
@@ -0,0 +1,267 @@
+From e2d5b4ba92289cb0fcc9db741d159ef5eb852d9f Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sat, 27 Aug 2011 20:08:14 +0200
+Subject: [PATCH 16/24] MIPS: lantiq: adds xway nand driver
+
+This patch adds a nand driver for XWAY SoCs. The patch makes use of the
+plat_nand driver. As with the EBU NOR driver merged in 3.0, we have the
+endianess swap problem on read. To workaround this problem we make the
+read_byte() callback available via the plat_nand driver causing the nand
+layer to do byte reads.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+
+TODO : memory ranges
+ cs lines
+ plat dev
+ ebu2 and not ebu1 ?
+---
+ .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 2 +
+ arch/mips/lantiq/xway/Makefile | 2 +-
+ arch/mips/lantiq/xway/nand.c | 185 ++++++++++++++++++++
+ drivers/mtd/nand/plat_nand.c | 1 +
+ include/linux/mtd/nand.h | 1 +
+ 5 files changed, 190 insertions(+), 1 deletions(-)
+ create mode 100644 arch/mips/lantiq/xway/nand.c
+
+diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+index 86ed0d2..729dfa2 100644
+--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
++++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+@@ -140,6 +140,8 @@
+ /* register access macros for EBU and CGU */
+ #define ltq_ebu_w32(x, y) ltq_w32((x), ltq_ebu_membase + (y))
+ #define ltq_ebu_r32(x) ltq_r32(ltq_ebu_membase + (x))
++#define ltq_ebu_w32_mask(x, y, z) \
++ ltq_w32_mask(x, y, ltq_ebu_membase + (z))
+ #define ltq_cgu_w32(x, y) ltq_w32((x), ltq_cgu_membase + (y))
+ #define ltq_cgu_r32(x) ltq_r32(ltq_cgu_membase + (x))
+
+diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile
+index 6678402..ac7cc34 100644
+--- a/arch/mips/lantiq/xway/Makefile
++++ b/arch/mips/lantiq/xway/Makefile
+@@ -1,4 +1,4 @@
+-obj-y := sysctrl.o reset.o gpio.o gpio_stp.o gpio_ebu.o devices.o dma.o
++obj-y := sysctrl.o reset.o gpio.o gpio_stp.o gpio_ebu.o devices.o dma.o nand.o
+
+ obj-$(CONFIG_SOC_XWAY) += clk-xway.o prom-xway.o
+ obj-$(CONFIG_SOC_AMAZON_SE) += clk-ase.o prom-ase.o
+diff --git a/arch/mips/lantiq/xway/nand.c b/arch/mips/lantiq/xway/nand.c
+new file mode 100644
+index 0000000..ba2443c
+--- /dev/null
++++ b/arch/mips/lantiq/xway/nand.c
+@@ -0,0 +1,185 @@
++/*
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/mtd/physmap.h>
++#include <linux/mtd/nand.h>
++#include <linux/platform_device.h>
++
++#include <lantiq_soc.h>
++#include <lantiq_irq.h>
++#include <lantiq_platform.h>
++
++#include "devices.h"
++
++/* nand registers */
++#define LTQ_EBU_NAND_WAIT 0xB4
++#define LTQ_EBU_NAND_ECC0 0xB8
++#define LTQ_EBU_NAND_ECC_AC 0xBC
++#define LTQ_EBU_NAND_CON 0xB0
++#define LTQ_EBU_ADDSEL1 0x24
++
++/* gpio definitions */
++#define PIN_ALE 13
++#define PIN_CLE 24
++#define PIN_CS1 23
++#define PIN_RDY 48 /* NFLASH_READY */
++#define PIN_RD 49 /* NFLASH_READ_N */
++
++#define NAND_CMD_ALE (1 << 2)
++#define NAND_CMD_CLE (1 << 3)
++#define NAND_CMD_CS (1 << 4)
++#define NAND_WRITE_CMD_RESET 0xff
++#define NAND_WRITE_CMD (NAND_CMD_CS | NAND_CMD_CLE)
++#define NAND_WRITE_ADDR (NAND_CMD_CS | NAND_CMD_ALE)
++#define NAND_WRITE_DATA (NAND_CMD_CS)
++#define NAND_READ_DATA (NAND_CMD_CS)
++#define NAND_WAIT_WR_C (1 << 3)
++#define NAND_WAIT_RD (0x1)
++
++#define ADDSEL1_MASK(x) (x << 4)
++#define ADDSEL1_REGEN 1
++#define BUSCON1_SETUP (1 << 22)
++#define BUSCON1_BCGEN_RES (0x3 << 12)
++#define BUSCON1_WAITWRC2 (2 << 8)
++#define BUSCON1_WAITRDC2 (2 << 6)
++#define BUSCON1_HOLDC1 (1 << 4)
++#define BUSCON1_RECOVC1 (1 << 2)
++#define BUSCON1_CMULT4 1
++#define NAND_CON_NANDM 1
++#define NAND_CON_CSMUX (1 << 1)
++#define NAND_CON_CS_P (1 << 4)
++#define NAND_CON_SE_P (1 << 5)
++#define NAND_CON_WP_P (1 << 6)
++#define NAND_CON_PRE_P (1 << 7)
++#define NAND_CON_IN_CS0 0
++#define NAND_CON_OUT_CS0 0
++#define NAND_CON_IN_CS1 (1 << 8)
++#define NAND_CON_OUT_CS1 (1 << 10)
++#define NAND_CON_CE (1 << 20)
++
++#define NAND_BASE_ADDRESS (KSEG1 | 0x14000000)
++
++static const char *part_probes[] = { "cmdlinepart", NULL };
++
++static void
++xway_select_chip(struct mtd_info *mtd, int chip)
++{
++ switch (chip) {
++ case -1:
++ ltq_ebu_w32_mask(NAND_CON_CE, 0, LTQ_EBU_NAND_CON);
++ ltq_ebu_w32_mask(NAND_CON_NANDM, 0, LTQ_EBU_NAND_CON);
++ break;
++ case 0:
++ ltq_ebu_w32_mask(0, NAND_CON_NANDM, LTQ_EBU_NAND_CON);
++ ltq_ebu_w32_mask(0, NAND_CON_CE, LTQ_EBU_NAND_CON);
++ /* reset the nand chip */
++ while((ltq_ebu_r32(LTQ_EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0);
++ ltq_w32(NAND_WRITE_CMD_RESET, ((u32*)(NAND_BASE_ADDRESS | NAND_WRITE_CMD)));
++ break;
++ default:
++ BUG();
++ }
++}
++
++static void
++xway_cmd_ctrl(struct mtd_info *mtd, int data, unsigned int ctrl)
++{
++ struct nand_chip *this = mtd->priv;
++
++ if (ctrl & NAND_CTRL_CHANGE) {
++ if(ctrl & NAND_CLE)
++ this->IO_ADDR_W = (void __iomem *)(NAND_BASE_ADDRESS | NAND_WRITE_CMD);
++ else if(ctrl & NAND_ALE)
++ this->IO_ADDR_W = (void __iomem *)(NAND_BASE_ADDRESS | NAND_WRITE_ADDR);
++ }
++
++ if(data != NAND_CMD_NONE) {
++ *(volatile u8*)((u32)this->IO_ADDR_W) = data;
++ while((ltq_ebu_r32(LTQ_EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0);
++ }
++}
++
++static int
++xway_dev_ready(struct mtd_info *mtd)
++{
++ return ltq_ebu_r32(LTQ_EBU_NAND_WAIT) & NAND_WAIT_RD;
++}
++
++void
++nand_write(unsigned int addr, unsigned int val)
++{
++ ltq_w32(val, ((u32*)(NAND_BASE_ADDRESS | addr)));
++ while((ltq_ebu_r32(LTQ_EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0);
++}
++
++unsigned char
++ltq_nand_read_byte(struct mtd_info *mtd)
++{
++ return ltq_r8((void __iomem *)(NAND_BASE_ADDRESS | (NAND_READ_DATA)));
++}
++
++int xway_nand_probe(struct platform_device *pdev)
++{
++// ltq_gpio_request(PIN_CS1, 1, 0, 1, "NAND_CS1");
++ ltq_gpio_request(PIN_CLE, 1, 0, 1, "NAND_CLE");
++ ltq_gpio_request(PIN_ALE, 1, 0, 1, "NAND_ALE");
++ if (ltq_is_ar9() || ltq_is_vr9()) {
++ ltq_gpio_request(PIN_RDY, 1, 0, 0, "NAND_BSY");
++ ltq_gpio_request(PIN_RD, 1, 0, 1, "NAND_RD");
++ }
++
++ ltq_ebu_w32((NAND_BASE_ADDRESS & 0x1fffff00)
++ | ADDSEL1_MASK(3) | ADDSEL1_REGEN, LTQ_EBU_ADDSEL1);
++
++ ltq_ebu_w32(BUSCON1_SETUP | BUSCON1_BCGEN_RES | BUSCON1_WAITWRC2
++ | BUSCON1_WAITRDC2 | BUSCON1_HOLDC1 | BUSCON1_RECOVC1
++ | BUSCON1_CMULT4, LTQ_EBU_BUSCON1);
++
++ ltq_ebu_w32(NAND_CON_NANDM | NAND_CON_CSMUX | NAND_CON_CS_P
++ | NAND_CON_SE_P | NAND_CON_WP_P | NAND_CON_PRE_P
++ | NAND_CON_IN_CS0 | NAND_CON_OUT_CS0, LTQ_EBU_NAND_CON);
++
++ ltq_w32(NAND_WRITE_CMD_RESET, ((u32*)(NAND_BASE_ADDRESS | NAND_WRITE_CMD)));
++ while((ltq_ebu_r32(LTQ_EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0);
++
++ return 0;
++}
++
++static struct platform_nand_data falcon_flash_nand_data = {
++ .chip = {
++ .nr_chips = 1,
++ .chip_delay = 30,
++ .part_probe_types = part_probes,
++ },
++ .ctrl = {
++ .probe = xway_nand_probe,
++ .cmd_ctrl = xway_cmd_ctrl,
++ .dev_ready = xway_dev_ready,
++ .select_chip = xway_select_chip,
++ .read_byte = ltq_nand_read_byte,
++ }
++};
++
++static struct resource ltq_nand_res =
++ MEM_RES("nand", 0x14000000, 0x3ffffff);
++
++static struct platform_device ltq_flash_nand = {
++ .name = "gen_nand",
++ .id = -1,
++ .num_resources = 1,
++ .resource = &ltq_nand_res,
++ .dev = {
++ .platform_data = &falcon_flash_nand_data,
++ },
++};
++
++void __init
++xway_register_nand(void)
++{
++ platform_device_register(&ltq_flash_nand);
++}
+diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
+index 633c04b..c3e3ef6 100644
+--- a/drivers/mtd/nand/plat_nand.c
++++ b/drivers/mtd/nand/plat_nand.c
+@@ -77,6 +77,7 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
+ data->chip.select_chip = pdata->ctrl.select_chip;
+ data->chip.write_buf = pdata->ctrl.write_buf;
+ data->chip.read_buf = pdata->ctrl.read_buf;
++ data->chip.read_byte = pdata->ctrl.read_byte;
+ data->chip.chip_delay = pdata->chip.chip_delay;
+ data->chip.options |= pdata->chip.options;
+
+diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
+index c2b9ac4..597e1a0 100644
+--- a/include/linux/mtd/nand.h
++++ b/include/linux/mtd/nand.h
+@@ -656,6 +656,7 @@ struct platform_nand_ctrl {
+ void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
+ void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
+ void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
++ unsigned char (*read_byte)(struct mtd_info *mtd);
+ void *priv;
+ };
+
+--
+1.7.5.4
+