From f3fcf92d595b297b47a1b58b8ec39f93f40ef912 Mon Sep 17 00:00:00 2001 From: Vipin KUMAR Date: Mon, 7 May 2012 13:00:19 +0530 Subject: [PATCH] st_smi: Add support for SPEAr SMI driver 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 Signed-off-by: Amit Virdi Signed-off-by: Stefan Roese --- drivers/mtd/Makefile | 2 +- drivers/mtd/{spr_smi.c => st_smi.c} | 7 ++++--- include/configs/spear-common.h | 6 +++--- .../include/asm/arch-spear/spr_smi.h => include/linux/mtd/st_smi.h | 6 ++++-- 4 files changed, 12 insertions(+), 9 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 6d4257a..db08ab9 100644 --- a/drivers/mtd/spr_smi.c +++ b/drivers/mtd/st_smi.c @@ -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 #include #include +#include #include #include -#include #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 8d0f036..75cc5ff 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 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 */ 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