diff --git a/arch/arm/mach-mmp/aspenite.c b/arch/arm/mach-mmp/aspenite.c
index 06b5fa8..b6589d6 100644
--- a/arch/arm/mach-mmp/aspenite.c
+++ b/arch/arm/mach-mmp/aspenite.c
@@ -167,8 +167,9 @@ static struct mtd_partition aspenite_nand_partitions[] = {
 
 static struct pxa3xx_nand_platform_data aspenite_nand_info = {
 	.enable_arbiter	= 1,
-	.parts		= aspenite_nand_partitions,
-	.nr_parts	= ARRAY_SIZE(aspenite_nand_partitions),
+	.cs_num = 1,
+	.parts[0]	= aspenite_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(aspenite_nand_partitions),
 };
 
 static struct i2c_board_info aspenite_i2c_info[] __initdata = {
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index b2248e7..d67eb7b 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -423,8 +423,9 @@ static struct mtd_partition cm_x300_nand_partitions[] = {
 static struct pxa3xx_nand_platform_data cm_x300_nand_info = {
 	.enable_arbiter	= 1,
 	.keep_config	= 1,
-	.parts		= cm_x300_nand_partitions,
-	.nr_parts	= ARRAY_SIZE(cm_x300_nand_partitions),
+	.cs_num		= 1,
+	.parts[0]	= cm_x300_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(cm_x300_nand_partitions),
 };
 
 static void __init cm_x300_init_nand(void)
diff --git a/arch/arm/mach-pxa/colibri-pxa3xx.c b/arch/arm/mach-pxa/colibri-pxa3xx.c
index 3f9be41..ff7a07b 100644
--- a/arch/arm/mach-pxa/colibri-pxa3xx.c
+++ b/arch/arm/mach-pxa/colibri-pxa3xx.c
@@ -139,8 +139,9 @@ static struct mtd_partition colibri_nand_partitions[] = {
 static struct pxa3xx_nand_platform_data colibri_nand_info = {
 	.enable_arbiter	= 1,
 	.keep_config	= 1,
-	.parts		= colibri_nand_partitions,
-	.nr_parts	= ARRAY_SIZE(colibri_nand_partitions),
+	.cs_num		= 1,
+	.parts[0]	= colibri_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(colibri_nand_partitions),
 };
 
 void __init colibri_pxa3xx_init_nand(void)
diff --git a/arch/arm/mach-pxa/littleton.c b/arch/arm/mach-pxa/littleton.c
index e5e326d..6eaf852 100644
--- a/arch/arm/mach-pxa/littleton.c
+++ b/arch/arm/mach-pxa/littleton.c
@@ -325,8 +325,9 @@ static struct mtd_partition littleton_nand_partitions[] = {
 
 static struct pxa3xx_nand_platform_data littleton_nand_info = {
 	.enable_arbiter	= 1,
-	.parts		= littleton_nand_partitions,
-	.nr_parts	= ARRAY_SIZE(littleton_nand_partitions),
+	.cs_num		= 1,
+	.parts[0]	= littleton_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(littleton_nand_partitions),
 };
 
 static void __init littleton_init_nand(void)
diff --git a/arch/arm/mach-pxa/mxm8x10.c b/arch/arm/mach-pxa/mxm8x10.c
index b5a8fd3..e7ce135 100644
--- a/arch/arm/mach-pxa/mxm8x10.c
+++ b/arch/arm/mach-pxa/mxm8x10.c
@@ -389,10 +389,11 @@ static struct mtd_partition mxm_8x10_nand_partitions[] = {
 };
 
 static struct pxa3xx_nand_platform_data mxm_8x10_nand_info = {
-	.enable_arbiter = 1,
-	.keep_config = 1,
-	.parts = mxm_8x10_nand_partitions,
-	.nr_parts = ARRAY_SIZE(mxm_8x10_nand_partitions)
+	.enable_arbiter	= 1,
+	.keep_config	= 1,
+	.cs_num		= 1,
+	.parts[0]	= mxm_8x10_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(mxm_8x10_nand_partitions)
 };
 
 static void __init mxm_8x10_nand_init(void)
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index d130f77..a54846d 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -349,8 +349,9 @@ static struct mtd_partition raumfeld_nand_partitions[] = {
 static struct pxa3xx_nand_platform_data raumfeld_nand_info = {
 	.enable_arbiter	= 1,
 	.keep_config	= 1,
-	.parts		= raumfeld_nand_partitions,
-	.nr_parts	= ARRAY_SIZE(raumfeld_nand_partitions),
+	.cs_num		= 1,
+	.parts[0]	= raumfeld_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(raumfeld_nand_partitions),
 };
 
 /**
diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index 5821185..ea4752a 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -366,8 +366,9 @@ static struct mtd_partition zylonite_nand_partitions[] = {
 
 static struct pxa3xx_nand_platform_data zylonite_nand_info = {
 	.enable_arbiter	= 1,
-	.parts		= zylonite_nand_partitions,
-	.nr_parts	= ARRAY_SIZE(zylonite_nand_partitions),
+	.cs_num		= 1,
+	.parts[0]	= zylonite_nand_partitions,
+	.nr_parts[0]	= ARRAY_SIZE(zylonite_nand_partitions),
 };
 
 static void __init zylonite_init_nand(void)
diff --git a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
index 442301f..34a3f52 100644
--- a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
+++ b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
@@ -41,6 +41,8 @@ struct pxa3xx_nand_flash {
 	struct pxa3xx_nand_timing *timing;	/* NAND Flash timing */
 };
 
+/* The max num of chip select current support */
+#define NUM_CHIP_SELECT		(2)
 struct pxa3xx_nand_platform_data {
 
 	/* the data flash bus is shared between the Static Memory
@@ -52,8 +54,10 @@ struct pxa3xx_nand_platform_data {
 	/* allow platform code to keep OBM/bootloader defined NFC config */
 	int	keep_config;
 
-	const struct mtd_partition		*parts;
-	unsigned int				nr_parts;
+	/* indicate how many chip select would be used for this platform */
+	int	cs_num;
+	const struct mtd_partition		*parts[NUM_CHIP_SELECT];
+	unsigned int				nr_parts[NUM_CHIP_SELECT];
 
 	const struct pxa3xx_nand_flash * 	flash;
 	size_t					num_flash;
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 30689cc..259b8d5 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -92,11 +92,13 @@
 #define NDCB0_ADDR_CYC_SHIFT	(16)
 
 /* macros for registers read/write */
-#define nand_writel(info, off, val)	\
-	__raw_writel((val), (info)->mmio_base + (off))
+#define nand_writel(nand, off, val)	\
+	__raw_writel((val), (nand)->mmio_base + (off))
 
-#define nand_readl(info, off)		\
-	__raw_readl((info)->mmio_base + (off))
+#define nand_readl(nand, off)		\
+	__raw_readl((nand)->mmio_base + (off))
+#define get_mtd_by_info(info)		\
+	(struct mtd_info *)((void *)info - sizeof(struct mtd_info))
 
 /* error code and state */
 enum {
@@ -110,6 +112,7 @@ enum {
 
 enum {
 	STATE_IDLE = 0,
+	STATE_PREPARED,
 	STATE_CMD_HANDLE,
 	STATE_DMA_READING,
 	STATE_DMA_WRITING,
@@ -123,63 +126,63 @@ enum {
 struct pxa3xx_nand_info {
 	struct nand_chip	nand_chip;
 
-	struct nand_hw_control	controller;
-	struct platform_device	 *pdev;
 	struct pxa3xx_nand_cmdset *cmdset;
+	/* page size of attached chip */
+	uint16_t		page_size;
+	uint8_t			chip_select;
+	uint8_t			use_ecc;
+
+	/* calculated from pxa3xx_nand_flash data */
+	uint8_t			col_addr_cycles;
+	uint8_t			row_addr_cycles;
+	uint8_t			read_id_bytes;
+
+	/* cached register value */
+	uint32_t		reg_ndcr;
+	uint32_t		ndtr0cs0;
+	uint32_t		ndtr1cs0;
 
+	void			*nand_data;
+};
+
+struct pxa3xx_nand {
 	struct clk		*clk;
 	void __iomem		*mmio_base;
 	unsigned long		mmio_phys;
+	struct nand_hw_control	controller;
+	struct completion	cmd_complete;
+	struct platform_device	 *pdev;
 
-	unsigned int 		buf_start;
-	unsigned int		buf_count;
-
-	struct mtd_info         *mtd;
 	/* DMA information */
 	int			drcmr_dat;
 	int			drcmr_cmd;
-
-	unsigned char		*data_buff;
-	unsigned char		*oob_buff;
-	dma_addr_t 		data_buff_phys;
-	size_t			data_buff_size;
 	int 			data_dma_ch;
-	struct pxa_dma_desc	*data_desc;
+	dma_addr_t		data_buff_phys;
 	dma_addr_t 		data_desc_addr;
+	struct pxa_dma_desc	*data_desc;
 
-	uint32_t		reg_ndcr;
-
-	/* saved column/page_addr during CMD_SEQIN */
-	int			seqin_column;
-	int			seqin_page_addr;
+	struct pxa3xx_nand_info *info[NUM_CHIP_SELECT];
+	uint32_t		command;
+	uint16_t		data_size;	/* data size in FIFO */
+	uint16_t		oob_size;
+	unsigned char		*data_buff;
+	unsigned char		*oob_buff;
+	uint32_t		buf_start;
+	uint32_t		buf_count;
 
 	/* relate to the command */
 	unsigned int		state;
-
+	uint8_t			chip_select;
 	int			use_ecc;	/* use HW ECC ? */
 	int			use_dma;	/* use DMA ? */
 	int			is_ready;
-
-	unsigned int		page_size;	/* page size of attached chip */
-	unsigned int		data_size;	/* data size in FIFO */
 	int 			retcode;
-	struct completion 	cmd_complete;
 
 	/* generated NDCBx register values */
+	uint8_t			total_cmds;
 	uint32_t		ndcb0;
 	uint32_t		ndcb1;
 	uint32_t		ndcb2;
-
-	/* timing calcuted from setting */
-	uint32_t		ndtr0cs0;
-	uint32_t		ndtr1cs0;
-
-	/* calculated from pxa3xx_nand_flash data */
-	size_t		oob_size;
-	size_t		read_id_bytes;
-
-	unsigned int	col_addr_cycles;
-	unsigned int	row_addr_cycles;
 };
 
 static int use_dma = 1;
@@ -225,7 +228,7 @@ static struct pxa3xx_nand_flash builtin_flash_types[] = {
 /* Define a default flash type setting serve as flash detecting only */
 #define DEFAULT_FLASH_TYPE (&builtin_flash_types[0])
 
-const char *mtd_names[] = {"pxa3xx_nand-0", NULL};
+const char *mtd_names[] = {"pxa3xx_nand-0", "pxa3xx_nand-1", NULL};
 
 #define NDTR0_tCH(c)	(min((c), 7) << 19)
 #define NDTR0_tCS(c)	(min((c), 7) << 16)
@@ -244,9 +247,11 @@ const char *mtd_names[] = {"pxa3xx_nand-0", NULL};
 static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info,
 				   const struct pxa3xx_nand_timing *t)
 {
-	unsigned long nand_clk = clk_get_rate(info->clk);
+	struct pxa3xx_nand *nand = info->nand_data;
+	unsigned long nand_clk;
 	uint32_t ndtr0, ndtr1;
 
+	nand_clk = clk_get_rate(nand->clk);
 	ndtr0 = NDTR0_tCH(ns2cycle(t->tCH, nand_clk)) |
 		NDTR0_tCS(ns2cycle(t->tCS, nand_clk)) |
 		NDTR0_tWH(ns2cycle(t->tWH, nand_clk)) |
@@ -260,26 +265,27 @@ static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info,
 
 	info->ndtr0cs0 = ndtr0;
 	info->ndtr1cs0 = ndtr1;
-	nand_writel(info, NDTR0CS0, ndtr0);
-	nand_writel(info, NDTR1CS0, ndtr1);
+	nand_writel(nand, NDTR0CS0, ndtr0);
+	nand_writel(nand, NDTR1CS0, ndtr1);
 }
 
 static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info)
 {
+	struct pxa3xx_nand *nand = info->nand_data;
 	int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
 
-	info->data_size = info->page_size;
+	nand->data_size = info->page_size;
 	if (!oob_enable) {
-		info->oob_size = 0;
+		nand->oob_size = 0;
 		return;
 	}
 
 	switch (info->page_size) {
 	case 2048:
-		info->oob_size = (info->use_ecc) ? 40 : 64;
+		nand->oob_size = (info->use_ecc) ? 40 : 64;
 		break;
 	case 512:
-		info->oob_size = (info->use_ecc) ? 8 : 16;
+		nand->oob_size = (info->use_ecc) ? 8 : 16;
 		break;
 	}
 }
@@ -290,185 +296,189 @@ static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info)
  * We enable all the interrupt at the same time, and
  * let pxa3xx_nand_irq to handle all logic.
  */
-static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
+static void pxa3xx_nand_start(struct pxa3xx_nand *nand)
 {
+	struct pxa3xx_nand_info *info;
 	uint32_t ndcr;
 
+	info = nand->info[nand->chip_select];
 	ndcr = info->reg_ndcr;
-	ndcr |= info->use_ecc ? NDCR_ECC_EN : 0;
-	ndcr |= info->use_dma ? NDCR_DMA_EN : 0;
+	ndcr |= nand->use_ecc ? NDCR_ECC_EN : 0;
+	ndcr |= nand->use_dma ? NDCR_DMA_EN : 0;
 	ndcr |= NDCR_ND_RUN;
 
 	/* clear status bits and run */
-	nand_writel(info, NDCR, 0);
-	nand_writel(info, NDSR, NDSR_MASK);
-	nand_writel(info, NDCR, ndcr);
+	nand_writel(nand, NDCR, 0);
+	nand_writel(nand, NDSR, NDSR_MASK);
+	nand_writel(nand, NDCR, ndcr);
 }
 
-static void pxa3xx_nand_stop(struct pxa3xx_nand_info *info)
+static void pxa3xx_nand_stop(struct pxa3xx_nand *nand)
 {
 	uint32_t ndcr;
 	int timeout = NAND_STOP_DELAY;
 
 	/* wait RUN bit in NDCR become 0 */
-	ndcr = nand_readl(info, NDCR);
+	ndcr = nand_readl(nand, NDCR);
 	while ((ndcr & NDCR_ND_RUN) && (timeout-- > 0)) {
-		ndcr = nand_readl(info, NDCR);
+		ndcr = nand_readl(nand, NDCR);
 		udelay(1);
 	}
 
 	if (timeout <= 0) {
 		ndcr &= ~NDCR_ND_RUN;
-		nand_writel(info, NDCR, ndcr);
+		nand_writel(nand, NDCR, ndcr);
 	}
 	/* clear status bits */
-	nand_writel(info, NDSR, NDSR_MASK);
+	nand_writel(nand, NDSR, NDSR_MASK);
 }
 
-static void enable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
+static void enable_int(struct pxa3xx_nand *nand, uint32_t int_mask)
 {
 	uint32_t ndcr;
 
-	ndcr = nand_readl(info, NDCR);
-	nand_writel(info, NDCR, ndcr & ~int_mask);
+	ndcr = nand_readl(nand, NDCR);
+	nand_writel(nand, NDCR, ndcr & ~int_mask);
 }
 
-static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
+static void disable_int(struct pxa3xx_nand *nand, uint32_t int_mask)
 {
 	uint32_t ndcr;
 
-	ndcr = nand_readl(info, NDCR);
-	nand_writel(info, NDCR, ndcr | int_mask);
+	ndcr = nand_readl(nand, NDCR);
+	nand_writel(nand, NDCR, ndcr | int_mask);
 }
 
-static void handle_data_pio(struct pxa3xx_nand_info *info)
+static void handle_data_pio(struct pxa3xx_nand *nand)
 {
-	switch (info->state) {
+	switch (nand->state) {
 	case STATE_PIO_WRITING:
-		__raw_writesl(info->mmio_base + NDDB, info->data_buff,
-				DIV_ROUND_UP(info->data_size, 4));
-		if (info->oob_size > 0)
-			__raw_writesl(info->mmio_base + NDDB, info->oob_buff,
-					DIV_ROUND_UP(info->oob_size, 4));
+		__raw_writesl(nand->mmio_base + NDDB, nand->data_buff,
+				DIV_ROUND_UP(nand->data_size, 4));
+		if (nand->oob_size > 0)
+			__raw_writesl(nand->mmio_base + NDDB, nand->oob_buff,
+					DIV_ROUND_UP(nand->oob_size, 4));
 		break;
 	case STATE_PIO_READING:
-		__raw_readsl(info->mmio_base + NDDB, info->data_buff,
-				DIV_ROUND_UP(info->data_size, 4));
-		if (info->oob_size > 0)
-			__raw_readsl(info->mmio_base + NDDB, info->oob_buff,
-					DIV_ROUND_UP(info->oob_size, 4));
+		__raw_readsl(nand->mmio_base + NDDB, nand->data_buff,
+				DIV_ROUND_UP(nand->data_size, 4));
+		if (nand->oob_size > 0)
+			__raw_readsl(nand->mmio_base + NDDB, nand->oob_buff,
+					DIV_ROUND_UP(nand->oob_size, 4));
 		break;
 	default:
 		printk(KERN_ERR "%s: invalid state %d\n", __func__,
-				info->state);
+				nand->state);
 		BUG();
 	}
 }
 
-static void start_data_dma(struct pxa3xx_nand_info *info)
+static void start_data_dma(struct pxa3xx_nand *nand)
 {
-	struct pxa_dma_desc *desc = info->data_desc;
-	int dma_len = ALIGN(info->data_size + info->oob_size, 32);
+	struct pxa_dma_desc *desc = nand->data_desc;
+	int dma_len = ALIGN(nand->data_size + nand->oob_size, 32);
 
 	desc->ddadr = DDADR_STOP;
 	desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len;
 
-	switch (info->state) {
+	switch (nand->state) {
 	case STATE_DMA_WRITING:
-		desc->dsadr = info->data_buff_phys;
-		desc->dtadr = info->mmio_phys + NDDB;
+		desc->dsadr = nand->data_buff_phys;
+		desc->dtadr = nand->mmio_phys + NDDB;
 		desc->dcmd |= DCMD_INCSRCADDR | DCMD_FLOWTRG;
 		break;
 	case STATE_DMA_READING:
-		desc->dtadr = info->data_buff_phys;
-		desc->dsadr = info->mmio_phys + NDDB;
+		desc->dtadr = nand->data_buff_phys;
+		desc->dsadr = nand->mmio_phys + NDDB;
 		desc->dcmd |= DCMD_INCTRGADDR | DCMD_FLOWSRC;
 		break;
 	default:
 		printk(KERN_ERR "%s: invalid state %d\n", __func__,
-				info->state);
+				nand->state);
 		BUG();
 	}
 
-	DRCMR(info->drcmr_dat) = DRCMR_MAPVLD | info->data_dma_ch;
-	DDADR(info->data_dma_ch) = info->data_desc_addr;
-	DCSR(info->data_dma_ch) |= DCSR_RUN;
+	DRCMR(nand->drcmr_dat) = DRCMR_MAPVLD | nand->data_dma_ch;
+	DDADR(nand->data_dma_ch) = nand->data_desc_addr;
+	DCSR(nand->data_dma_ch) |= DCSR_RUN;
 }
 
 static void pxa3xx_nand_data_dma_irq(int channel, void *data)
 {
-	struct pxa3xx_nand_info *info = data;
+	struct pxa3xx_nand *nand = data;
 	uint32_t dcsr;
 
 	dcsr = DCSR(channel);
 	DCSR(channel) = dcsr;
 
 	if (dcsr & DCSR_BUSERR) {
-		info->retcode = ERR_DMABUSERR;
+		nand->retcode = ERR_DMABUSERR;
 	}
 
-	info->state = STATE_DMA_DONE;
-	enable_int(info, NDCR_INT_MASK);
-	nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
+	nand->state = STATE_DMA_DONE;
+	enable_int(nand, NDCR_INT_MASK);
+	nand_writel(nand, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
 }
 
 static irqreturn_t pxa3xx_nand_irq(int irq, void *devid)
 {
-	struct pxa3xx_nand_info *info = devid;
-	unsigned int status, is_completed = 0;
+	struct pxa3xx_nand *nand = devid;
+	struct pxa3xx_nand_info *info;
+	unsigned int status, is_completed = 0, cs;
+	unsigned int ready, cmd_done, page_done, badblock_detect;
 
-	status = nand_readl(info, NDSR);
+	cs		= nand->chip_select;
+	ready           = (cs) ? NDSR_RDY : NDSR_FLASH_RDY;
+	cmd_done        = (cs) ? NDSR_CS1_CMDD : NDSR_CS0_CMDD;
+	page_done       = (cs) ? NDSR_CS1_PAGED : NDSR_CS0_PAGED;
+	badblock_detect = (cs) ? NDSR_CS1_BBD : NDSR_CS0_BBD;
+	info            = nand->info[cs];
 
+	status = nand_readl(nand, NDSR);
 	if (status & NDSR_DBERR)
-		info->retcode = ERR_DBERR;
+		nand->retcode = ERR_DBERR;
 	if (status & NDSR_SBERR)
-		info->retcode = ERR_SBERR;
+		nand->retcode = ERR_SBERR;
 	if (status & (NDSR_RDDREQ | NDSR_WRDREQ)) {
 		/* whether use dma to transfer data */
-		if (info->use_dma) {
-			disable_int(info, NDCR_INT_MASK);
-			info->state = (status & NDSR_RDDREQ) ?
+		if (nand->use_dma) {
+			disable_int(nand, NDCR_INT_MASK);
+			nand->state = (status & NDSR_RDDREQ) ?
 				      STATE_DMA_READING : STATE_DMA_WRITING;
-			start_data_dma(info);
+			start_data_dma(nand);
 			goto NORMAL_IRQ_EXIT;
 		} else {
-			info->state = (status & NDSR_RDDREQ) ?
+			nand->state = (status & NDSR_RDDREQ) ?
 				      STATE_PIO_READING : STATE_PIO_WRITING;
-			handle_data_pio(info);
+			handle_data_pio(nand);
 		}
 	}
-	if (status & NDSR_CS0_CMDD) {
-		info->state = STATE_CMD_DONE;
+	if (status & cmd_done) {
+		nand->state = STATE_CMD_DONE;
 		is_completed = 1;
 	}
-	if (status & NDSR_FLASH_RDY) {
-		info->is_ready = 1;
-		info->state = STATE_READY;
+	if (status & ready) {
+		nand->is_ready = 1;
+		nand->state = STATE_READY;
 	}
 
 	if (status & NDSR_WRCMDREQ) {
-		nand_writel(info, NDSR, NDSR_WRCMDREQ);
+		nand_writel(nand, NDSR, NDSR_WRCMDREQ);
 		status &= ~NDSR_WRCMDREQ;
-		info->state = STATE_CMD_HANDLE;
-		nand_writel(info, NDCB0, info->ndcb0);
-		nand_writel(info, NDCB0, info->ndcb1);
-		nand_writel(info, NDCB0, info->ndcb2);
+		nand->state = STATE_CMD_HANDLE;
+		nand_writel(nand, NDCB0, nand->ndcb0);
+		nand_writel(nand, NDCB0, nand->ndcb1);
+		nand_writel(nand, NDCB0, nand->ndcb2);
 	}
 
 	/* clear NDSR to let the controller exit the IRQ */
-	nand_writel(info, NDSR, status);
+	nand_writel(nand, NDSR, status);
 	if (is_completed)
-		complete(&info->cmd_complete);
+		complete(&nand->cmd_complete);
 NORMAL_IRQ_EXIT:
 	return IRQ_HANDLED;
 }
 
-static int pxa3xx_nand_dev_ready(struct mtd_info *mtd)
-{
-	struct pxa3xx_nand_info *info = mtd->priv;
-	return (nand_readl(info, NDSR) & NDSR_RDY) ? 1 : 0;
-}
-
 static inline int is_buf_blank(uint8_t *buf, size_t len)
 {
 	for (; len > 0; len--)
@@ -477,42 +487,49 @@ static inline int is_buf_blank(uint8_t *buf, size_t len)
 	return 1;
 }
 
-static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
+static int prepare_command_pool(struct pxa3xx_nand *nand, int command,
 		uint16_t column, int page_addr)
 {
 	uint16_t cmd;
 	int addr_cycle, exec_cmd, ndcb0;
-	struct mtd_info *mtd = info->mtd;
+	struct mtd_info *mtd;
+	struct pxa3xx_nand_info *info = nand->info[nand->chip_select];
 
-	ndcb0 = 0;
+	mtd = get_mtd_by_info(info);
+	ndcb0 = (nand->chip_select) ? NDCB0_CSEL : 0;
 	addr_cycle = 0;
 	exec_cmd = 1;
 
 	/* reset data and oob column point to handle data */
-	info->buf_start		= 0;
-	info->buf_count		= 0;
-	info->oob_size		= 0;
-	info->use_ecc		= 0;
-	info->is_ready		= 0;
-	info->retcode		= ERR_NONE;
+	nand->buf_start		= 0;
+	nand->buf_count		= 0;
+	nand->oob_size		= 0;
+	nand->use_ecc		= 0;
+	nand->is_ready		= 0;
+	nand->retcode		= ERR_NONE;
+	nand->data_size		= 0;
+	nand->use_dma		= 0;
+	nand->command		= command;
 
 	switch (command) {
 	case NAND_CMD_READ0:
 	case NAND_CMD_PAGEPROG:
-		info->use_ecc = 1;
+		nand->use_ecc = 1;
 	case NAND_CMD_READOOB:
 		pxa3xx_set_datasize(info);
+		nand->oob_buff = nand->data_buff + nand->data_size;
+		nand->use_dma = use_dma;
 		break;
 	case NAND_CMD_SEQIN:
 		exec_cmd = 0;
 		break;
 	default:
-		info->ndcb1 = 0;
-		info->ndcb2 = 0;
+		nand->ndcb1 = 0;
+		nand->ndcb2 = 0;
 		break;
 	}
 
-	info->ndcb0 = ndcb0;
+	nand->ndcb0 = ndcb0;
 	addr_cycle = NDCB0_ADDR_CYC(info->row_addr_cycles
 				    + info->col_addr_cycles);
 
@@ -521,16 +538,16 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
 	case NAND_CMD_READ0:
 		cmd = info->cmdset->read1;
 		if (command == NAND_CMD_READOOB)
-			info->buf_start = mtd->writesize + column;
+			nand->buf_start = mtd->writesize + column;
 		else
-			info->buf_start = column;
+			nand->buf_start = column;
 
 		if (unlikely(info->page_size < PAGE_CHUNK_SIZE))
-			info->ndcb0 |= NDCB0_CMD_TYPE(0)
+			nand->ndcb0 |= NDCB0_CMD_TYPE(0)
 					| addr_cycle
 					| (cmd & NDCB0_CMD1_MASK);
 		else
-			info->ndcb0 |= NDCB0_CMD_TYPE(0)
+			nand->ndcb0 |= NDCB0_CMD_TYPE(0)
 					| NDCB0_DBC
 					| addr_cycle
 					| cmd;
@@ -538,34 +555,34 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
 	case NAND_CMD_SEQIN:
 		/* small page addr setting */
 		if (unlikely(info->page_size < PAGE_CHUNK_SIZE)) {
-			info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
+			nand->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
 					| (column & 0xFF);
 
-			info->ndcb2 = 0;
+			nand->ndcb2 = 0;
 		} else {
-			info->ndcb1 = ((page_addr & 0xFFFF) << 16)
+			nand->ndcb1 = ((page_addr & 0xFFFF) << 16)
 					| (column & 0xFFFF);
 
 			if (page_addr & 0xFF0000)
-				info->ndcb2 = (page_addr & 0xFF0000) >> 16;
+				nand->ndcb2 = (page_addr & 0xFF0000) >> 16;
 			else
-				info->ndcb2 = 0;
+				nand->ndcb2 = 0;
 		}
 
-		info->buf_count = mtd->writesize + mtd->oobsize;
-		memset(info->data_buff, 0xFF, info->buf_count);
+		nand->buf_count = mtd->writesize + mtd->oobsize;
+		memset(nand->data_buff, 0xFF, nand->buf_count);
 
 		break;
 
 	case NAND_CMD_PAGEPROG:
-		if (is_buf_blank(info->data_buff,
+		if (is_buf_blank(nand->data_buff,
 					(mtd->writesize + mtd->oobsize))) {
 			exec_cmd = 0;
 			break;
 		}
 
 		cmd = info->cmdset->program;
-		info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
+		nand->ndcb0 |= NDCB0_CMD_TYPE(0x1)
 				| NDCB0_AUTO_RS
 				| NDCB0_ST_ROW_EN
 				| NDCB0_DBC
@@ -575,37 +592,37 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
 
 	case NAND_CMD_READID:
 		cmd = info->cmdset->read_id;
-		info->buf_count = info->read_id_bytes;
-		info->ndcb0 |= NDCB0_CMD_TYPE(3)
+		nand->buf_count = info->read_id_bytes;
+		nand->ndcb0 |= NDCB0_CMD_TYPE(3)
 				| NDCB0_ADDR_CYC(1)
 				| cmd;
 
-		info->data_size = 8;
+		nand->data_size = 8;
 		break;
 	case NAND_CMD_STATUS:
 		cmd = info->cmdset->read_status;
-		info->buf_count = 1;
-		info->ndcb0 |= NDCB0_CMD_TYPE(4)
+		nand->buf_count = 1;
+		nand->ndcb0 |= NDCB0_CMD_TYPE(4)
 				| NDCB0_ADDR_CYC(1)
 				| cmd;
 
-		info->data_size = 8;
+		nand->data_size = 8;
 		break;
 
 	case NAND_CMD_ERASE1:
 		cmd = info->cmdset->erase;
-		info->ndcb0 |= NDCB0_CMD_TYPE(2)
+		nand->ndcb0 |= NDCB0_CMD_TYPE(2)
 				| NDCB0_AUTO_RS
 				| NDCB0_ADDR_CYC(3)
 				| NDCB0_DBC
 				| cmd;
-		info->ndcb1 = page_addr;
-		info->ndcb2 = 0;
+		nand->ndcb1 = page_addr;
+		nand->ndcb2 = 0;
 
 		break;
 	case NAND_CMD_RESET:
 		cmd = info->cmdset->reset;
-		info->ndcb0 |= NDCB0_CMD_TYPE(5)
+		nand->ndcb0 |= NDCB0_CMD_TYPE(5)
 				| cmd;
 
 		break;
@@ -628,6 +645,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
 				int column, int page_addr)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
+	struct pxa3xx_nand *nand = info->nand_data;
 	int ret, exec_cmd;
 
 	/*
@@ -638,20 +656,32 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
 	if (info->reg_ndcr & NDCR_DWIDTH_M)
 		column /= 2;
 
-	exec_cmd = prepare_command_pool(info, command, column, page_addr);
+	/*
+	 * There may be different NAND chip hooked to
+	 * different chip select, so check whether
+	 * chip select has been changed, if yes, reset the timing
+	 */
+	if (nand->chip_select != info->chip_select) {
+		nand->chip_select = info->chip_select;
+		nand_writel(nand, NDTR0CS0, info->ndtr0cs0);
+		nand_writel(nand, NDTR1CS0, info->ndtr1cs0);
+	}
+
+	nand->state = STATE_PREPARED;
+	exec_cmd = prepare_command_pool(nand, command, column, page_addr);
 	if (exec_cmd) {
-		init_completion(&info->cmd_complete);
-		pxa3xx_nand_start(info);
+		init_completion(&nand->cmd_complete);
+		pxa3xx_nand_start(nand);
 
-		ret = wait_for_completion_timeout(&info->cmd_complete,
+		ret = wait_for_completion_timeout(&nand->cmd_complete,
 				CHIP_DELAY_TIMEOUT);
 		if (!ret) {
 			printk(KERN_ERR "Wait time out!!!\n");
 			/* Stop State Machine for next command cycle */
-			pxa3xx_nand_stop(info);
+			pxa3xx_nand_stop(nand);
 		}
-		info->state = STATE_IDLE;
 	}
+	nand->state = STATE_IDLE;
 }
 
 static void pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd,
@@ -665,11 +695,12 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
 		struct nand_chip *chip, uint8_t *buf, int page)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
+	struct pxa3xx_nand *nand = info->nand_data;
 
 	chip->read_buf(mtd, buf, mtd->writesize);
 	chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
 
-	if (info->retcode == ERR_SBERR) {
+	if (nand->retcode == ERR_SBERR) {
 		switch (info->use_ecc) {
 		case 1:
 			mtd->ecc_stats.corrected++;
@@ -678,14 +709,14 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
 		default:
 			break;
 		}
-	} else if (info->retcode == ERR_DBERR) {
+	} else if (nand->retcode == ERR_DBERR) {
 		/*
 		 * for blank page (all 0xff), HW will calculate its ECC as
 		 * 0, which is different from the ECC information within
 		 * OOB, ignore such double bit errors
 		 */
 		if (is_buf_blank(buf, mtd->writesize))
-			info->retcode = ERR_NONE;
+			nand->retcode = ERR_NONE;
 		else
 			mtd->ecc_stats.failed++;
 	}
@@ -696,11 +727,12 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
 static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
+	struct pxa3xx_nand *nand = info->nand_data;
 	char retval = 0xFF;
 
-	if (info->buf_start < info->buf_count)
+	if (nand->buf_start < nand->buf_count)
 		/* Has just send a new command? */
-		retval = info->data_buff[info->buf_start++];
+		retval = nand->data_buff[nand->buf_start++];
 
 	return retval;
 }
@@ -708,11 +740,12 @@ static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd)
 static u16 pxa3xx_nand_read_word(struct mtd_info *mtd)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
+	struct pxa3xx_nand *nand = info->nand_data;
 	u16 retval = 0xFFFF;
 
-	if (!(info->buf_start & 0x01) && info->buf_start < info->buf_count) {
-		retval = *((u16 *)(info->data_buff+info->buf_start));
-		info->buf_start += 2;
+	if (!(nand->buf_start & 0x01) && nand->buf_start < nand->buf_count) {
+		retval = *((u16 *)(nand->data_buff+nand->buf_start));
+		nand->buf_start += 2;
 	}
 	return retval;
 }
@@ -720,20 +753,22 @@ static u16 pxa3xx_nand_read_word(struct mtd_info *mtd)
 static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
-	int real_len = min_t(size_t, len, info->buf_count - info->buf_start);
+	struct pxa3xx_nand *nand = info->nand_data;
+	int real_len = min_t(size_t, len, nand->buf_count - nand->buf_start);
 
-	memcpy(buf, info->data_buff + info->buf_start, real_len);
-	info->buf_start += real_len;
+	memcpy(buf, nand->data_buff + nand->buf_start, real_len);
+	nand->buf_start += real_len;
 }
 
 static void pxa3xx_nand_write_buf(struct mtd_info *mtd,
 		const uint8_t *buf, int len)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
-	int real_len = min_t(size_t, len, info->buf_count - info->buf_start);
+	struct pxa3xx_nand *nand = info->nand_data;
+	int real_len = min_t(size_t, len, nand->buf_count - nand->buf_start);
 
-	memcpy(info->data_buff + info->buf_start, buf, real_len);
-	info->buf_start += real_len;
+	memcpy(nand->data_buff + nand->buf_start, buf, real_len);
+	nand->buf_start += real_len;
 }
 
 static int pxa3xx_nand_verify_buf(struct mtd_info *mtd,
@@ -750,10 +785,11 @@ static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip)
 static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
+	struct pxa3xx_nand *nand = info->nand_data;
 
 	/* pxa3xx_nand_send_command has waited for command complete */
 	if (this->state == FL_WRITING || this->state == FL_ERASING) {
-		if (info->retcode == ERR_NONE)
+		if (nand->retcode == ERR_NONE)
 			return 0;
 		else {
 			/*
@@ -770,7 +806,8 @@ static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
 static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
 				    const struct pxa3xx_nand_flash *f)
 {
-	struct platform_device *pdev = info->pdev;
+	struct pxa3xx_nand *nand = info->nand_data;
+	struct platform_device *pdev = nand->pdev;
 	struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data;
 	uint32_t ndcr = 0x0; /* enable all interrupts */
 
@@ -804,6 +841,7 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
 	ndcr |= NDCR_SPARE_EN; /* enable spare by default */
 
 	info->reg_ndcr = ndcr;
+	info->use_ecc = 1;
 
 	pxa3xx_nand_set_timing(info, f->timing);
 	return 0;
@@ -811,15 +849,22 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
 
 static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
 {
-	uint32_t ndcr = nand_readl(info, NDCR);
+	struct pxa3xx_nand *nand = info->nand_data;
+	uint32_t ndcr = nand_readl(nand, NDCR);
+
+	if (info->chip_select > 0) {
+		printk(KERN_ERR "We could not detect configure"
+				" if more than one cs is supported!!\n");
+		BUG();
+	}
 	info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512;
 	/* set info fields needed to read id */
 	info->read_id_bytes = (info->page_size == 2048) ? 4 : 2;
 	info->reg_ndcr = ndcr & ~NDCR_INT_MASK;
 	info->cmdset = &default_cmdset;
 
-	info->ndtr0cs0 = nand_readl(info, NDTR0CS0);
-	info->ndtr1cs0 = nand_readl(info, NDTR1CS0);
+	info->ndtr0cs0 = nand_readl(nand, NDTR0CS0);
+	info->ndtr1cs0 = nand_readl(nand, NDTR1CS0);
 
 	return 0;
 }
@@ -830,50 +875,31 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
  */
 #define MAX_BUFF_SIZE	PAGE_SIZE
 
-static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info)
+static void free_cs_resource(struct pxa3xx_nand_info *info, int cs)
 {
-	struct platform_device *pdev = info->pdev;
-	int data_desc_offset = MAX_BUFF_SIZE - sizeof(struct pxa_dma_desc);
-
-	if (use_dma == 0) {
-		info->data_buff = kmalloc(MAX_BUFF_SIZE, GFP_KERNEL);
-		if (info->data_buff == NULL)
-			return -ENOMEM;
-		return 0;
-	}
-
-	info->data_buff = dma_alloc_coherent(&pdev->dev, MAX_BUFF_SIZE,
-				&info->data_buff_phys, GFP_KERNEL);
-	if (info->data_buff == NULL) {
-		dev_err(&pdev->dev, "failed to allocate dma buffer\n");
-		return -ENOMEM;
-	}
-
-	info->data_buff_size = MAX_BUFF_SIZE;
-	info->data_desc = (void *)info->data_buff + data_desc_offset;
-	info->data_desc_addr = info->data_buff_phys + data_desc_offset;
+	struct pxa3xx_nand *nand;
+	struct mtd_info *mtd;
 
-	info->data_dma_ch = pxa_request_dma("nand-data", DMA_PRIO_LOW,
-				pxa3xx_nand_data_dma_irq, info);
-	if (info->data_dma_ch < 0) {
-		dev_err(&pdev->dev, "failed to request data dma\n");
-		dma_free_coherent(&pdev->dev, info->data_buff_size,
-				info->data_buff, info->data_buff_phys);
-		return info->data_dma_ch;
-	}
+	if (!info)
+		return;
 
-	return 0;
+	nand = info->nand_data;
+	mtd = get_mtd_by_info(info);
+	kfree(mtd);
+	nand->info[cs] = NULL;
 }
 
 static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info)
 {
-	struct mtd_info *mtd = info->mtd;
+	struct pxa3xx_nand *nand = info->nand_data;
+	struct mtd_info *mtd = get_mtd_by_info(info);
 	struct nand_chip *chip = mtd->priv;
 
 	/* use the common timing to make a try */
-	pxa3xx_nand_config_flash(info, &builtin_flash_types[0]);
+	if (pxa3xx_nand_config_flash(info, &builtin_flash_types[0]))
+		return 0;
 	chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0);
-	if (info->is_ready)
+	if (nand->is_ready)
 		return 1;
 	else
 		return 0;
@@ -882,7 +908,8 @@ static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info)
 static int pxa3xx_nand_scan(struct mtd_info *mtd)
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
-	struct platform_device *pdev = info->pdev;
+	struct pxa3xx_nand *nand = info->nand_data;
+	struct platform_device *pdev = nand->pdev;
 	struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data;
 	struct nand_flash_dev pxa3xx_flash_ids[2], *def = NULL;
 	const struct pxa3xx_nand_flash *f = NULL;
@@ -891,27 +918,25 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
 	uint64_t chipsize;
 	int i, ret, num;
 
+	nand->chip_select = info->chip_select;
 	if (pdata->keep_config && !pxa3xx_nand_detect_config(info))
 		goto KEEP_CONFIG;
 
 	ret = pxa3xx_nand_sensing(info);
 	if (!ret) {
-		kfree(mtd);
-		info->mtd = NULL;
-		printk(KERN_INFO "There is no nand chip on cs 0!\n");
+		free_cs_resource(info, nand->chip_select);
+		printk(KERN_INFO "There is no nand chip on cs %d!\n",
+				nand->chip_select);
 
 		return -EINVAL;
 	}
 
 	chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0);
-	id = *((uint16_t *)(info->data_buff));
+	id = *((uint16_t *)(nand->data_buff));
 	if (id != 0)
 		printk(KERN_INFO "Detect a flash id %x\n", id);
 	else {
-		kfree(mtd);
-		info->mtd = NULL;
-		printk(KERN_WARNING "Read out ID 0, potential timing set wrong!!\n");
-
+		free_cs_resource(info, nand->chip_select);
 		return -EINVAL;
 	}
 
@@ -928,14 +953,16 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
 	}
 
 	if (i >= (ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1)) {
-		kfree(mtd);
-		info->mtd = NULL;
+		free_cs_resource(info, nand->chip_select);
 		printk(KERN_ERR "ERROR!! flash not defined!!!\n");
 
 		return -EINVAL;
 	}
 
-	pxa3xx_nand_config_flash(info, f);
+	if (pxa3xx_nand_config_flash(info, f)) {
+		printk(KERN_ERR "ERROR! Configure failed\n");
+		return -EINVAL;
+	}
 	pxa3xx_flash_ids[0].name = f->name;
 	pxa3xx_flash_ids[0].id = (f->chip_id >> 8) & 0xffff;
 	pxa3xx_flash_ids[0].pagesize = f->page_size;
@@ -950,13 +977,13 @@ KEEP_CONFIG:
 	if (nand_scan_ident(mtd, 1, def))
 		return -ENODEV;
 	/* calculate addressing information */
+	nand->oob_buff = nand->data_buff + mtd->writesize;
 	info->col_addr_cycles = (mtd->writesize >= 2048) ? 2 : 1;
-	info->oob_buff = info->data_buff + mtd->writesize;
 	if ((mtd->size >> chip->page_shift) > 65536)
 		info->row_addr_cycles = 3;
 	else
 		info->row_addr_cycles = 2;
-	mtd->name = mtd_names[0];
+	mtd->name = mtd_names[nand->chip_select];
 	chip->ecc.mode = NAND_ECC_HW;
 	chip->ecc.size = info->page_size;
 
@@ -967,51 +994,33 @@ KEEP_CONFIG:
 	return nand_scan_tail(mtd);
 }
 
-static
-struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev)
+static int alloc_nand_resource(struct platform_device *pdev)
 {
+	struct pxa3xx_nand_platform_data *pdata;
 	struct pxa3xx_nand_info *info;
 	struct nand_chip *chip;
 	struct mtd_info *mtd;
+	struct pxa3xx_nand *nand;
 	struct resource *r;
-	int ret, irq;
+	int ret, irq, cs;
+	int data_desc_offset = MAX_BUFF_SIZE - sizeof(struct pxa_dma_desc);
 
-	mtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct pxa3xx_nand_info),
-			GFP_KERNEL);
-	if (!mtd) {
+	pdata = pdev->dev.platform_data;
+	nand = kzalloc(sizeof(struct mtd_info)
+			+ sizeof(struct pxa3xx_nand_info), GFP_KERNEL);
+	if (!nand) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
-		return NULL;
+		return -ENOMEM;
 	}
 
-	info = (struct pxa3xx_nand_info *)(&mtd[1]);
-	chip = (struct nand_chip *)(&mtd[1]);
-	info->pdev = pdev;
-	info->mtd = mtd;
-	mtd->priv = info;
-	mtd->owner = THIS_MODULE;
-
-	chip->ecc.read_page	= pxa3xx_nand_read_page_hwecc;
-	chip->ecc.write_page	= pxa3xx_nand_write_page_hwecc;
-	chip->controller        = &info->controller;
-	chip->waitfunc		= pxa3xx_nand_waitfunc;
-	chip->select_chip	= pxa3xx_nand_select_chip;
-	chip->dev_ready		= pxa3xx_nand_dev_ready;
-	chip->cmdfunc		= pxa3xx_nand_cmdfunc;
-	chip->read_word		= pxa3xx_nand_read_word;
-	chip->read_byte		= pxa3xx_nand_read_byte;
-	chip->read_buf		= pxa3xx_nand_read_buf;
-	chip->write_buf		= pxa3xx_nand_write_buf;
-	chip->verify_buf	= pxa3xx_nand_verify_buf;
-
-	spin_lock_init(&chip->controller->lock);
-	init_waitqueue_head(&chip->controller->wq);
-	info->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(info->clk)) {
+	nand->pdev = pdev;
+	nand->clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(nand->clk)) {
 		dev_err(&pdev->dev, "failed to get nand clock\n");
-		ret = PTR_ERR(info->clk);
-		goto fail_free_mtd;
+		ret = PTR_ERR(nand->clk);
+		goto fail_alloc;
 	}
-	clk_enable(info->clk);
+	clk_enable(nand->clk);
 
 	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 	if (r == NULL) {
@@ -1019,7 +1028,7 @@ struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev)
 		ret = -ENXIO;
 		goto fail_put_clk;
 	}
-	info->drcmr_dat = r->start;
+	nand->drcmr_dat = r->start;
 
 	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 	if (r == NULL) {
@@ -1027,7 +1036,7 @@ struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev)
 		ret = -ENXIO;
 		goto fail_put_clk;
 	}
-	info->drcmr_cmd = r->start;
+	nand->drcmr_cmd = r->start;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
@@ -1050,81 +1059,147 @@ struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev)
 		goto fail_put_clk;
 	}
 
-	info->mmio_base = ioremap(r->start, resource_size(r));
-	if (info->mmio_base == NULL) {
+	nand->mmio_base = ioremap(r->start, resource_size(r));
+	if (nand->mmio_base == NULL) {
 		dev_err(&pdev->dev, "ioremap() failed\n");
 		ret = -ENODEV;
 		goto fail_free_res;
 	}
-	info->mmio_phys = r->start;
-
-	ret = pxa3xx_nand_init_buff(info);
-	if (ret)
-		goto fail_free_io;
+	nand->mmio_phys = r->start;
 
 	/* initialize all interrupts to be disabled */
-	disable_int(info, NDSR_MASK);
+	disable_int(nand, NDSR_MASK);
 
 	ret = request_irq(irq, pxa3xx_nand_irq, IRQF_DISABLED,
-			  pdev->name, info);
+			  pdev->name, nand);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to request IRQ\n");
-		goto fail_free_buf;
+		ret = -ENXIO;
+		goto fail_free_io;
+	}
+
+	platform_set_drvdata(pdev, nand);
+
+	spin_lock_init(&nand->controller.lock);
+	init_waitqueue_head(&nand->controller.wq);
+	for (cs = 0; cs < pdata->cs_num; cs++) {
+		mtd = kzalloc(sizeof(struct mtd_info)
+				+ sizeof(struct pxa3xx_nand_info),
+				GFP_KERNEL);
+		if (!mtd) {
+			dev_err(&pdev->dev, "failed to allocate memory\n");
+			ret = -ENOMEM;
+			goto fail_free_irq;
+		}
+
+		info = (struct pxa3xx_nand_info *)(&mtd[1]);
+		info->nand_data = nand;
+		info->chip_select = cs;
+		mtd->priv = info;
+		mtd->owner = THIS_MODULE;
+		nand->info[cs] = info;
+
+		chip = (struct nand_chip *)(&mtd[1]);
+		chip->controller        = &nand->controller;
+		chip->ecc.read_page	= pxa3xx_nand_read_page_hwecc;
+		chip->ecc.write_page	= pxa3xx_nand_write_page_hwecc;
+		chip->waitfunc		= pxa3xx_nand_waitfunc;
+		chip->select_chip	= pxa3xx_nand_select_chip;
+		chip->cmdfunc		= pxa3xx_nand_cmdfunc;
+		chip->read_word		= pxa3xx_nand_read_word;
+		chip->read_byte		= pxa3xx_nand_read_byte;
+		chip->read_buf		= pxa3xx_nand_read_buf;
+		chip->write_buf		= pxa3xx_nand_write_buf;
+		chip->verify_buf	= pxa3xx_nand_verify_buf;
 	}
 
-	platform_set_drvdata(pdev, info);
+	if (use_dma == 0) {
+		nand->data_buff = kmalloc(MAX_BUFF_SIZE, GFP_KERNEL);
+		if (nand->data_buff == NULL) {
+			ret = -ENOMEM;
+			goto fail_free_buf;
+		}
+		goto success_exit;
+	}
 
-	return info;
+	nand->data_buff = dma_alloc_coherent(&pdev->dev, MAX_BUFF_SIZE,
+			&nand->data_buff_phys, GFP_KERNEL);
+	if (nand->data_buff == NULL) {
+		dev_err(&pdev->dev, "failed to allocate dma buffer\n");
+		ret = -ENOMEM;
+		goto fail_free_buf;
+	}
 
+	nand->data_desc = (void *)nand->data_buff + data_desc_offset;
+	nand->data_desc_addr = nand->data_buff_phys + data_desc_offset;
+	nand->data_dma_ch = pxa_request_dma("nand-data", DMA_PRIO_LOW,
+			pxa3xx_nand_data_dma_irq, nand);
+	if (nand->data_dma_ch < 0) {
+		dev_err(&pdev->dev, "failed to request data dma\n");
+		ret = -ENXIO;
+		goto fail_free_dma_buf;
+	}
+success_exit:
+	return 0;
+
+fail_free_dma_buf:
+	dma_free_writecombine(&pdev->dev, MAX_BUFF_SIZE,
+			nand->data_buff, nand->data_buff_phys);
 fail_free_buf:
-	free_irq(irq, info);
-	if (use_dma) {
-		pxa_free_dma(info->data_dma_ch);
-		dma_free_coherent(&pdev->dev, info->data_buff_size,
-			info->data_buff, info->data_buff_phys);
-	} else
-		kfree(info->data_buff);
+	for (cs = 0; cs < pdata->cs_num; cs++) {
+		info = nand->info[cs];
+		free_cs_resource(info, cs);
+	}
+fail_free_irq:
+	free_irq(irq, nand);
 fail_free_io:
-	iounmap(info->mmio_base);
+	iounmap(nand->mmio_base);
 fail_free_res:
 	release_mem_region(r->start, resource_size(r));
 fail_put_clk:
-	clk_disable(info->clk);
-	clk_put(info->clk);
-fail_free_mtd:
-	kfree(mtd);
-	return NULL;
+	clk_disable(nand->clk);
+	clk_put(nand->clk);
+fail_alloc:
+	kfree(nand);
+	return ret;
 }
 
 static int pxa3xx_nand_remove(struct platform_device *pdev)
 {
-	struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
-	struct mtd_info *mtd = info->mtd;
+	struct pxa3xx_nand *nand = platform_get_drvdata(pdev);
+	struct pxa3xx_nand_platform_data *pdata;
+	struct pxa3xx_nand_info *info;
+	struct mtd_info *mtd;
 	struct resource *r;
-	int irq;
+	int irq, cs;
 
 	platform_set_drvdata(pdev, NULL);
+	pdata = pdev->dev.platform_data;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq >= 0)
-		free_irq(irq, info);
+		free_irq(irq, nand);
 	if (use_dma) {
-		pxa_free_dma(info->data_dma_ch);
-		dma_free_writecombine(&pdev->dev, info->data_buff_size,
-				info->data_buff, info->data_buff_phys);
+		pxa_free_dma(nand->data_dma_ch);
+		dma_free_writecombine(&pdev->dev, MAX_BUFF_SIZE,
+				nand->data_buff, nand->data_buff_phys);
 	} else
-		kfree(info->data_buff);
+		kfree(nand->data_buff);
 
-	iounmap(info->mmio_base);
+	iounmap(nand->mmio_base);
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	release_mem_region(r->start, resource_size(r));
 
-	clk_disable(info->clk);
-	clk_put(info->clk);
+	clk_disable(nand->clk);
+	clk_put(nand->clk);
 
-	if (mtd) {
+	for (cs = 0; cs < pdata->cs_num; cs++) {
+		info = nand->info[cs];
+		if (!info)
+			continue;
+		mtd = get_mtd_by_info(info);
 		mtd_device_unregister(mtd);
-		kfree(mtd);
+		free_cs_resource(info, cs);
 	}
 	return 0;
 }
@@ -1134,34 +1209,54 @@ static int pxa3xx_nand_probe(struct platform_device *pdev)
 	struct pxa3xx_nand_platform_data *pdata;
 	struct pxa3xx_nand_info *info;
 
+	struct pxa3xx_nand *nand;
+	struct mtd_info *mtd;
+	int cs, ret, nr_parts, probe_success;
+
+	probe_success = 0;
 	pdata = pdev->dev.platform_data;
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data defined\n");
 		return -ENODEV;
 	}
 
-	info = alloc_nand_resource(pdev);
-	if (info == NULL)
+	ret = alloc_nand_resource(pdev);
+	if (ret)
 		return -ENOMEM;
 
-	if (pxa3xx_nand_scan(info->mtd)) {
-		dev_err(&pdev->dev, "failed to scan nand\n");
-		pxa3xx_nand_remove(pdev);
-		return -ENODEV;
-	}
+	nand = platform_get_drvdata(pdev);
+	for (cs = 0; cs < pdata->cs_num; cs++) {
+		info = nand->info[cs];
+		mtd = get_mtd_by_info(info);
+		if (pxa3xx_nand_scan(mtd)) {
+			dev_err(&pdev->dev, "failed to scan nand\n");
+			continue;
+		}
+
+		ret = 0;
+		nr_parts = 0;
+		if (mtd_has_cmdlinepart()) {
+			const char *probes[] = { "cmdlinepart", NULL };
+			struct mtd_partition *parts;
 
-	if (mtd_has_cmdlinepart()) {
-		const char *probes[] = { "cmdlinepart", NULL };
-		struct mtd_partition *parts;
-		int nr_parts;
+			nr_parts = parse_mtd_partitions(mtd, probes, &parts, 0);
 
-		nr_parts = parse_mtd_partitions(info->mtd, probes, &parts, 0);
+			if (nr_parts)
+				ret = mtd_device_register(mtd, parts, nr_parts);
+		}
 
-		if (nr_parts)
-			return mtd_device_register(info->mtd, parts, nr_parts);
+		if (!nr_parts)
+			ret = mtd_device_register(mtd, pdata->parts[cs],
+					pdata->nr_parts[cs]);
+		if (!ret)
+			probe_success = 1;
 	}
 
-	return mtd_device_register(info->mtd, pdata->parts, pdata->nr_parts);
+	if (!probe_success) {
+		pxa3xx_nand_remove(pdev);
+		return -ENODEV;
+	} else
+		return 0;
 }
 
 #ifdef CONFIG_PM
@@ -1183,8 +1278,8 @@ static int pxa3xx_nand_resume(struct platform_device *pdev)
 	struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
 	struct mtd_info *mtd = info->mtd;
 
-	nand_writel(info, NDTR0CS0, info->ndtr0cs0);
-	nand_writel(info, NDTR1CS0, info->ndtr1cs0);
+	nand_writel(nand, NDTR0CS0, info->ndtr0cs0);
+	nand_writel(nand, NDTR1CS0, info->ndtr1cs0);
 	clk_enable(info->clk);
 
 	return 0;
