rkflash: support transfer large size data

Change-Id: I36c5daabb952215bbc4d2cb2cffb82df3fa7085a
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>

drivers/rkflash/sfc.c

@@ -11,6 +11,9 @@
 
 #include "sfc.h"
 
+#define SFC_MAX_IOSIZE_VER3		(1024 * 8)
+#define SFC_MAX_IOSIZE_VER4		(0xFFFFFFFF)
+
 static void __iomem *g_sfc_reg;
 
 static void sfc_reset(void)
@@ -30,11 +33,21 @@ u16 sfc_get_version(void)
 	return  (u32)(readl(g_sfc_reg + SFC_VER) & 0xffff);
 }
 
+u32 sfc_get_max_iosize(void)
+{
+	if (sfc_get_version() >= SFC_VER_4)
+		return SFC_MAX_IOSIZE_VER4;
+	else
+		return SFC_MAX_IOSIZE_VER3;
+}
+
 int sfc_init(void __iomem *reg_addr)
 {
 	g_sfc_reg = reg_addr;
 	sfc_reset();
 	writel(0, g_sfc_reg + SFC_CTRL);
+	if (sfc_get_version() >= SFC_VER_4)
+		writel(1, g_sfc_reg + SFC_LEN_CTRL);
 
 	return SFC_OK;
 }
@@ -70,6 +83,10 @@ int sfc_request(struct rk_sfc_op *op, u32 addr, void *data, u32 size)
 	/* shift in the data at negedge sclk_out */
 	op->sfctrl.d32 |= 0x2;
 	cmd.b.datasize = size;
+	if (sfc_get_version() >= SFC_VER_4)
+		writel(size, g_sfc_reg + SFC_LEN_EXT);
+	else
+		cmd.b.datasize = size;
 
 	writel(op->sfctrl.d32, g_sfc_reg + SFC_CTRL);
 	writel(cmd.d32, g_sfc_reg + SFC_CMD);
@@ -96,7 +113,7 @@ int sfc_request(struct rk_sfc_op *op, u32 addr, void *data, u32 size)
 		writel(SFC_DMA_START, g_sfc_reg + SFC_DMA_TRIGGER);
 
 		timeout = size * 10;
-		while (!((readl(g_sfc_reg + SFC_RAWISR) & DMA_INT)) &&
+		while ((readl(g_sfc_reg + SFC_SR) & SFC_BUSY) &&
 		       (timeout-- > 0))
 			sfc_delay(1);
 		writel(0xFFFFFFFF, g_sfc_reg + SFC_ICLR);

drivers/rkflash/sfc.h

@@ -7,9 +7,9 @@
 #ifndef _SFC_H
 #define _SFC_H
 
-#define SFC_VER_3		0x3 /* ver 3, else ver 1 */
+#define SFC_VER_3		0x3
+#define SFC_VER_4		0x4
 
-#define SFC_MAX_IOSIZE		(1024 * 8)    /* 8K byte */
 #define SFC_EN_INT		(0)         /* enable interrupt */
 #define SFC_EN_DMA		(1)         /* enable dma */
 #define SFC_FIFO_DEPTH		(0x10)      /* 16 words */
@@ -193,6 +193,7 @@ int sfc_init(void __iomem *reg_addr);
 int sfc_request(struct rk_sfc_op *op, u32 addr, void *data, u32 size);
 u16 sfc_get_version(void);
 void sfc_clean_irq(void);
+u32 sfc_get_max_iosize(void);
 int rksfc_get_reg_addr(unsigned long *p_sfc_addr);
 
 #endif

drivers/rkflash/sfc_nor.c

@@ -312,7 +312,7 @@ int snor_prog_page(struct SFNOR_DEV *p_dev,
 
 	op.sfctrl.d32 = 0;
 	op.sfctrl.b.datalines = p_dev->prog_lines;
-	op.sfctrl.b.enbledma = 0;
+	op.sfctrl.b.enbledma = 1;
 	if (p_dev->prog_cmd == CMD_PAGE_PROG_A4)
 		op.sfctrl.b.addrlines = SFC_4BITS_LINE;
 
@@ -408,7 +408,7 @@ int snor_read_data(struct SFNOR_DEV *p_dev,
 	op.sfctrl.d32 = 0;
 	op.sfctrl.b.datalines = p_dev->read_lines;
 	if (!(size & 0x3) && size >= 4)
-		op.sfctrl.b.enbledma = 0;
+		op.sfctrl.b.enbledma = 1;
 
 	if (p_dev->read_cmd == CMD_FAST_READ_X1 ||
 	    p_dev->read_cmd == CMD_FAST_READ_X4 ||
@@ -445,7 +445,7 @@ int snor_read(struct SFNOR_DEV *p_dev, u32 sec, u32 n_sec, void *p_data)
 	addr = sec << 9;
 	size = n_sec << 9;
 	while (size) {
-		len = size < SFC_MAX_IOSIZE ? size : SFC_MAX_IOSIZE;
+		len = size < p_dev->max_iosize ? size : p_dev->max_iosize;
 		ret = snor_read_data(p_dev, addr, p_buf, len);
 		if (ret != SFC_OK) {
 			rkflash_print_error("snor_read_data %x ret= %x\n",
@@ -586,6 +586,7 @@ int snor_init(struct SFNOR_DEV *p_dev)
 		return SFC_PARAM_ERR;
 
 	memset((void *)p_dev, 0, sizeof(struct SFNOR_DEV));
+	p_dev->max_iosize = sfc_get_max_iosize();
 	snor_read_id(id_byte);
 	rkflash_print_error("sfc nor id: %x %x %x\n",
 			    id_byte[0], id_byte[1], id_byte[2]);

drivers/rkflash/sfc_nor.h

@@ -112,6 +112,7 @@ struct SFNOR_DEV {
 	enum SFC_DATA_LINES prog_lines;
 
 	SNOR_WRITE_STATUS write_status;
+	u32 max_iosize;
 };
 
 struct flash_info {