[U-Boot] [PATCH 01/11] st_smi: Add support for SPEAr SMI driver

Amit Virdi
2012-02-24T12:23:04Z

From: Vipin KUMAR <vipin.kumar@st.com>

SMI is the serial memory interface controller provided by ST.

Earlier, a driver exists in the u-boot source code for the SMI IP. However, it
was specific to spear platforms. This commit converts the same driver to a more
generic driver. As a result, the driver files are renamed to st_smi.c and
st_smi.h and moved into drivers/mtd folder for reusability by other platforms
using smi controller peripheral.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
---
drivers/mtd/Makefile | 2 +-
drivers/mtd/{spr_smi.c => st_smi.c} | 5 +++--
include/configs/spear-common.h | 6 +++---
.../spr_smi.h => include/linux/mtd/st_smi.h | 6 ++++--
4 files changed, 11 insertions(+), 8 deletions(-)
rename drivers/mtd/{spr_smi.c => st_smi.c} (99%)
rename arch/arm/include/asm/arch-spear/spr_smi.h => include/linux/mtd/st_smi.h (98%)

diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 5a5ecdf..543c845 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -35,7 +35,7 @@ COBJS-$(CONFIG_HAS_DATAFLASH) += dataflash.o
COBJS-$(CONFIG_FTSMC020) += ftsmc020.o
COBJS-$(CONFIG_FLASH_CFI_LEGACY) += jedec_flash.o
COBJS-$(CONFIG_MW_EEPROM) += mw_eeprom.o
-COBJS-$(CONFIG_SPEARSMI) += spr_smi.o
+COBJS-$(CONFIG_ST_SMI) += st_smi.o

COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/mtd/spr_smi.c b/drivers/mtd/st_smi.c
similarity index 99%
rename from drivers/mtd/spr_smi.c
rename to drivers/mtd/st_smi.c
index 9a70a19..b514046 100644
--- a/drivers/mtd/spr_smi.c
+++ b/drivers/mtd/st_smi.c
@@ -24,10 +24,10 @@
#include <common.h>
#include <flash.h>
#include <linux/err.h>
+#include <linux/mtd/st_smi.h>

#include <asm/io.h>
#include <asm/arch/hardware.h>
-#include <asm/arch/spr_smi.h>

#if !defined(CONFIG_SYS_NO_FLASH)

@@ -82,6 +82,7 @@ static unsigned int smi_read_id(flash_info_t *info, int banknum)
writel(READ_ID, &smicntl->smi_tr);
writel((banknum << BANKSEL_SHIFT) | SEND | TX_LEN_1 | RX_LEN_3,
&smicntl->smi_cr2);
+
smi_wait_xfer_finish(XFER_FINISH_TOUT);

value = (readl(&smicntl->smi_rr) & 0x00FFFFFF);
@@ -232,7 +233,7 @@ static int smi_write_enable(int bank)
*
* SMI initialization routine. Sets SMI control register1.
*/
-static void smi_init(void)
+void smi_init(void)
{
/* Setting the fast mode values. SMI working at 166/4 = 41.5 MHz */
writel(HOLD1 | FAST_MODE | BANK_EN | DSEL_TIME | PRESCAL4,
diff --git a/include/configs/spear-common.h b/include/configs/spear-common.h
index 3947fd5..5a582e8 100644
--- a/include/configs/spear-common.h
+++ b/include/configs/spear-common.h
@@ -55,10 +55,10 @@
#if defined(CONFIG_FLASH_PNOR)
#define CONFIG_SPEAR_EMI
#else
-#define CONFIG_SPEARSMI
+#define CONFIG_ST_SMI
#endif

-#if defined(CONFIG_SPEARSMI)
+#if defined(CONFIG_ST_SMI)

#define CONFIG_SYS_MAX_FLASH_BANKS 2
#define CONFIG_SYS_FLASH_BASE 0xF8000000
@@ -124,7 +124,7 @@
* U-Boot Environment placing definitions.
*/
#if defined(CONFIG_ENV_IS_IN_FLASH)
-#ifdef CONFIG_SPEARSMI
+#ifdef CONFIG_ST_SMI
/*
* Environment is in serial NOR flash
*/
diff --git a/arch/arm/include/asm/arch-spear/spr_smi.h b/include/linux/mtd/st_smi.h
similarity index 98%
rename from arch/arm/include/asm/arch-spear/spr_smi.h
rename to include/linux/mtd/st_smi.h
index 06df745..b7a78ac 100644
--- a/arch/arm/include/asm/arch-spear/spr_smi.h
+++ b/include/linux/mtd/st_smi.h
@@ -21,8 +21,8 @@
* MA 02111-1307 USA
*/

-#ifndef SPR_SMI_H
-#define SPR_SMI_H
+#ifndef ST_SMI_H
+#define ST_SMI_H

/* 0xF800.0000 . 0xFBFF.FFFF 64MB SMI (Serial Flash Mem) */
/* 0xFC00.0000 . 0xFC1F.FFFF 2MB SMI (Serial Flash Reg.) */
@@ -112,4 +112,6 @@ struct flash_dev {
#define XFER_FINISH_TOUT 2 /* xfer finish timeout */
#define WMODE_TOUT 2 /* write enable timeout */

+extern void smi_init(void);
+
#endif
--
1.7.2.2