diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.2/0041-MIPS-lantiq-add-xway-nand-driver.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.2/0041-MIPS-lantiq-add-xway-nand-driver.patch | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.2/0041-MIPS-lantiq-add-xway-nand-driver.patch b/target/linux/lantiq/patches-3.2/0041-MIPS-lantiq-add-xway-nand-driver.patch new file mode 100644 index 0000000..c2e2e1b --- /dev/null +++ b/target/linux/lantiq/patches-3.2/0041-MIPS-lantiq-add-xway-nand-driver.patch @@ -0,0 +1,310 @@ +From 9c7a6f8804aef7559ee8edcb7466676ee7d00c09 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Sat, 27 Aug 2011 20:08:14 +0200 +Subject: [PATCH 41/70] MIPS: lantiq: add 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/devices.h | 1 + + arch/mips/lantiq/xway/nand.c | 216 ++++++++++++++++++++ + drivers/mtd/nand/plat_nand.c | 1 + + include/linux/mtd/nand.h | 1 + + 6 files changed, 222 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 3f22acb..ab2d236 100644 +--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h ++++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h +@@ -145,6 +145,8 @@ + /* 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 9d1a0a2..277aa34 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 clk.o prom.o ++obj-y := sysctrl.o reset.o gpio.o gpio_stp.o gpio_ebu.o devices.o dma.o clk.o prom.o nand.o + + obj-$(CONFIG_LANTIQ_MACH_EASY50712) += mach-easy50712.o + obj-$(CONFIG_LANTIQ_MACH_EASY50601) += mach-easy50601.o +diff --git a/arch/mips/lantiq/xway/devices.h b/arch/mips/lantiq/xway/devices.h +index e904934..d825cbd 100644 +--- a/arch/mips/lantiq/xway/devices.h ++++ b/arch/mips/lantiq/xway/devices.h +@@ -16,5 +16,6 @@ extern void ltq_register_gpio(void); + extern void ltq_register_gpio_stp(void); + extern void ltq_register_ase_asc(void); + extern void ltq_register_etop(struct ltq_eth_data *eth); ++extern void xway_register_nand(struct mtd_partition *parts, int count); + + #endif +diff --git a/arch/mips/lantiq/xway/nand.c b/arch/mips/lantiq/xway/nand.c +new file mode 100644 +index 0000000..9ab91d8 +--- /dev/null ++++ b/arch/mips/lantiq/xway/nand.c +@@ -0,0 +1,216 @@ ++/* ++ * 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 <linux/io.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 xway_read_byte(struct mtd_info *mtd) ++{ ++ return ltq_r8((void __iomem *)(NAND_BASE_ADDRESS | (NAND_READ_DATA))); ++} ++ ++static void xway_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) ++{ ++ int i; ++ ++ for (i = 0; i < len; i++) ++ { ++ unsigned char res8 = ltq_r8((void __iomem *)(NAND_BASE_ADDRESS | (NAND_READ_DATA))); ++ buf[i] = res8; ++ } ++} ++ ++static void xway_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) ++{ ++ int i; ++ ++ for (i = 0; i < len; i++) ++ { ++ ltq_w8(buf[i], ((u32*)(NAND_BASE_ADDRESS | (NAND_WRITE_DATA)))); ++ while((ltq_ebu_r32(LTQ_EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0); ++ } ++} ++ ++int xway_probe(struct platform_device *pdev) ++{ ++ /* might need this later ? ++ ltq_gpio_request(PIN_CS1, 2, 1, "NAND_CS1"); ++ */ ++ ltq_gpio_request(&pdev->dev, PIN_CLE, 2, 1, "NAND_CLE"); ++ ltq_gpio_request(&pdev->dev, PIN_ALE, 2, 1, "NAND_ALE"); ++ if (ltq_is_ar9() || ltq_is_vr9()) { ++ ltq_gpio_request(&pdev->dev, PIN_RDY, 2, 0, "NAND_BSY"); ++ ltq_gpio_request(&pdev->dev, PIN_RD, 2, 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_probe, ++ .cmd_ctrl = xway_cmd_ctrl, ++ .dev_ready = xway_dev_ready, ++ .select_chip = xway_select_chip, ++ .read_byte = xway_read_byte, ++ .read_buf = xway_read_buf, ++ .write_buf = xway_write_buf, ++ } ++}; ++ ++static struct resource ltq_nand_res = ++ MEM_RES("nand", 0x14000000, 0x7ffffff); ++ ++static struct platform_device ltq_flash_nand = { ++ .name = "gen_nand", ++ .id = -1, ++ .num_resources = 1, ++ .resource = <q_nand_res, ++ .dev = { ++ .platform_data = &falcon_flash_nand_data, ++ }, ++}; ++ ++void __init xway_register_nand(struct mtd_partition *parts, int count) ++{ ++ falcon_flash_nand_data.chip.partitions = parts; ++ falcon_flash_nand_data.chip.nr_partitions = count; ++ platform_device_register(<q_flash_nand); ++} +diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c +index ea8e123..9040ba1 100644 +--- a/drivers/mtd/nand/plat_nand.c ++++ b/drivers/mtd/nand/plat_nand.c +@@ -75,6 +75,7 @@ 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; + data->chip.bbt_options |= pdata->chip.bbt_options; +diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h +index 904131b..80e11b9 100644 +--- a/include/linux/mtd/nand.h ++++ b/include/linux/mtd/nand.h +@@ -650,6 +650,7 @@ 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; + }; + +-- +1.7.7.1 + |