Patchwork [U-Boot,v2,6/7] mtd/st_smi: Use page sizes respective to flash

login
register
mail settings
Submitter Vipin Kumar
Date Dec. 6, 2012, 8:47 a.m.
Message ID <f78aac32ab4f2b63069293d7c338dd17b585a7f2.1354783388.git.vipin.kumar@st.com>
Download mbox | patch
Permalink /patch/204183/
State New
Delegated to: Stefan Roese
Headers show

Comments

Vipin Kumar - Dec. 6, 2012, 8:47 a.m.
The page size is a flash dependent property and the driver was using a macro in
place of page size. This patch uses the proper page size wrt the flash device
connected on board

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Acked-by: Stefan Roese <sr@denx.de>
---
 drivers/mtd/st_smi.c       | 41 +++++++++++++++++++++++++++++++++--------
 include/linux/mtd/st_smi.h |  1 -
 2 files changed, 33 insertions(+), 9 deletions(-)

Patch

diff --git a/drivers/mtd/st_smi.c b/drivers/mtd/st_smi.c
index 5f67807..0ed6c0d 100644
--- a/drivers/mtd/st_smi.c
+++ b/drivers/mtd/st_smi.c
@@ -96,6 +96,25 @@  static struct flash_device flash_devices[] = {
 };
 
 /*
+ * get_flash_device - Return flash_device pointer for a particular device id
+ * @id:	 Device id
+ *
+ * Return flash_device pointer for a particular device id
+ */
+static struct flash_device *get_flash_device(u32 id)
+{
+	struct flash_device *flash_dev_p = &flash_devices[0];
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(flash_devices); i++, flash_dev_p++) {
+		if (flash_dev_p->device_id == id)
+			return flash_dev_p;
+	}
+
+	return NULL;
+}
+
+/*
  * smi_wait_xfer_finish - Wait until TFF is set in status register
  * @timeout:	 timeout in milliseconds
  *
@@ -361,20 +380,27 @@  static int smi_sector_erase(flash_info_t *info, unsigned int sector)
 
 /*
  * smi_write - Write to SMI flash
+ * @info:	 flash info structure
  * @src_addr:	 source buffer
  * @dst_addr:	 destination buffer
  * @length:	 length to write in bytes
- * @bank:	 bank base address
  *
  * Write to SMI flash
  */
-static int smi_write(unsigned char *src_addr, unsigned char *dst_addr,
-		     unsigned int length, ulong bank_addr)
+static int smi_write(flash_info_t *info, unsigned char *src_addr,
+		unsigned char *dst_addr, unsigned int length)
 {
+	struct flash_device *flash_device_p = get_flash_device(info->flash_id);
+	u32 page_size;
 	int banknum;
 	int issue_we;
 
-	switch (bank_addr) {
+	if (!flash_device_p)
+		return -EIO;
+
+	page_size = flash_device_p->pagesize;
+
+	switch (info->start[0]) {
 	case SMIBANK0_BASE:
 		banknum = BANK0;
 		break;
@@ -400,9 +426,9 @@  static int smi_write(unsigned char *src_addr, unsigned char *dst_addr,
 	/* Perform the write command */
 	while (length) {
 		int k;
-		unsigned int wlen = min(SFLASH_PAGE_SIZE, length);
+		unsigned int wlen = min(page_size, length);
 
-		if (issue_we || (((ulong)(dst_addr) % SFLASH_PAGE_SIZE) == 0)) {
+		if (issue_we || (((ulong)(dst_addr) % page_size) == 0)) {
 			issue_we = 0;
 
 			if (smi_wait_till_ready(banknum,
@@ -444,8 +470,7 @@  static int smi_write(unsigned char *src_addr, unsigned char *dst_addr,
  */
 int write_buff(flash_info_t *info, uchar *src, ulong dest_addr, ulong length)
 {
-	return smi_write(src, (unsigned char *)dest_addr, length,
-			info->start[0]);
+	return smi_write(info, src, (unsigned char *)dest_addr, length);
 }
 
 /*
diff --git a/include/linux/mtd/st_smi.h b/include/linux/mtd/st_smi.h
index 04f81ea..5837493 100644
--- a/include/linux/mtd/st_smi.h
+++ b/include/linux/mtd/st_smi.h
@@ -108,7 +108,6 @@  struct flash_dev {
 	ushort sector_count;
 };
 
-#define SFLASH_PAGE_SIZE	0x100	/* flash page size */
 #define XFER_FINISH_TOUT	15	/* xfer finish timeout(in ms) */
 #define WMODE_TOUT		15	/* write enable timeout(in ms) */