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st_smi: Add support for SPEAr SMI driver

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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>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Vipin KUMAR 2012-05-07 13:00:19 +05:30 committed by Albert ARIBAUD
parent 0def98e7be
commit f3fcf92d59
4 changed files with 12 additions and 9 deletions
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2
drivers/mtd/Makefile
View file

@ -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)

7
drivers/mtd/spr_smi.c → drivers/mtd/st_smi.c
View file

@ -1,6 +1,6 @@
/*
* (C) Copyright 2009
* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
* Vipin Kumar, ST Microelectronics, vipin.kumar@st.com.
*
* See file CREDITS for list of people who contributed to this
* project.
@ -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,

6
include/configs/spear-common.h
View file

@ -55,10 +55,10 @@
#if defined(CONFIG_FLASH_PNOR)
#define CONFIG_SPEAR_EMI 1
#else
#define CONFIG_SPEARSMI 1
#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)
@ -125,7 +125,7 @@
* 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
*/

6
arch/arm/include/asm/arch-spear/spr_smi.h → include/linux/mtd/st_smi.h
View file

@ -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