[PATCH v5 1/2] memory: ti-aemif: introduce AEMIF driver
Add new AEMIF driver for EMIF16 Texas Instruments controller. The EMIF16 module is intended to provide a glue-less interface to a variety of asynchronous memory devices like ASRA M, NOR and NAND memory. A total of 256M bytes of any of these memories can be accessed at any given time via 4 chip selects with 64M byte access per chip select. Synchronous memories such as DDR1 SD RAM, SDR SDRAM and Mobile SDR are not supported. This controller is used on SoCs like Davinci, Keysone2 Acked-by: Santosh Shilimkar Signed-off-by: Ivan Khoronzhuk --- drivers/memory/Kconfig| 11 ++ drivers/memory/Makefile | 1 + drivers/memory/ti-aemif.c | 427 ++ 3 files changed, 439 insertions(+) create mode 100644 drivers/memory/ti-aemif.c diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index 29a11db..7bc3982 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -7,6 +7,17 @@ menuconfig MEMORY if MEMORY +config TI_AEMIF + tristate "Texas Instruments AEMIF driver" + depends on (ARCH_DAVINCI || ARCH_KEYSTONE) && OF + help + This driver is for the AEMIF module available in Texas Instruments + SoCs. AEMIF stands for Asynchronous External Memory Interface and + is intended to provide a glue-less interface to a variety of + asynchronuous memory devices like ASRAM, NOR and NAND memory. A total + of 256M bytes of any of these memories can be accessed at a given + time via four chip selects with 64M byte access per chip select. + config TI_EMIF tristate "Texas Instruments EMIF driver" depends on ARCH_OMAP2PLUS diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index 969d923..d4e150c 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -5,6 +5,7 @@ ifeq ($(CONFIG_DDR),y) obj-$(CONFIG_OF) += of_memory.o endif +obj-$(CONFIG_TI_AEMIF) += ti-aemif.o obj-$(CONFIG_TI_EMIF) += emif.o obj-$(CONFIG_MVEBU_DEVBUS) += mvebu-devbus.o obj-$(CONFIG_TEGRA20_MC) += tegra20-mc.o diff --git a/drivers/memory/ti-aemif.c b/drivers/memory/ti-aemif.c new file mode 100644 index 000..fcc25a1 --- /dev/null +++ b/drivers/memory/ti-aemif.c @@ -0,0 +1,427 @@ +/* + * TI AEMIF driver + * + * Copyright (C) 2010 - 2013 Texas Instruments Incorporated. http://www.ti.com/ + * + * Authors: + * Murali Karicheri + * Ivan Khoronzhuk + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define TA_SHIFT 2 +#define RHOLD_SHIFT4 +#define RSTROBE_SHIFT 7 +#define RSETUP_SHIFT 13 +#define WHOLD_SHIFT17 +#define WSTROBE_SHIFT 20 +#define WSETUP_SHIFT 26 +#define EW_SHIFT 30 +#define SS_SHIFT 31 + +#define TA(x) ((x) << TA_SHIFT) +#define RHOLD(x) ((x) << RHOLD_SHIFT) +#define RSTROBE(x) ((x) << RSTROBE_SHIFT) +#define RSETUP(x) ((x) << RSETUP_SHIFT) +#define WHOLD(x) ((x) << WHOLD_SHIFT) +#define WSTROBE(x) ((x) << WSTROBE_SHIFT) +#define WSETUP(x) ((x) << WSETUP_SHIFT) +#define EW(x) ((x) << EW_SHIFT) +#define SS(x) ((x) << SS_SHIFT) + +#define ASIZE_MAX 0x1 +#define TA_MAX 0x3 +#define RHOLD_MAX 0x7 +#define RSTROBE_MAX0x3f +#define RSETUP_MAX 0xf +#define WHOLD_MAX 0x7 +#define WSTROBE_MAX0x3f +#define WSETUP_MAX 0xf +#define EW_MAX 0x1 +#define SS_MAX 0x1 +#define NUM_CS 4 + +#define TA_VAL(x) (((x) & TA(TA_MAX)) >> TA_SHIFT) +#define RHOLD_VAL(x) (((x) & RHOLD(RHOLD_MAX)) >> RHOLD_SHIFT) +#define RSTROBE_VAL(x) (((x) & RSTROBE(RSTROBE_MAX)) >> RSTROBE_SHIFT) +#define RSETUP_VAL(x) (((x) & RSETUP(RSETUP_MAX)) >> RSETUP_SHIFT) +#define WHOLD_VAL(x) (((x) & WHOLD(WHOLD_MAX)) >> WHOLD_SHIFT) +#define WSTROBE_VAL(x) (((x) & WSTROBE(WSTROBE_MAX)) >> WSTROBE_SHIFT) +#define WSETUP_VAL(x) (((x) & WSETUP(WSETUP_MAX)) >> WSETUP_SHIFT) +#define EW_VAL(x) (((x) & EW(EW_MAX)) >> EW_SHIFT) +#define SS_VAL(x) (((x) & SS(SS_MAX)) >> SS_SHIFT) + +#define NRCSR_OFFSET 0x00 +#define AWCCR_OFFSET 0x04 +#define A1CR_OFFSET0x10 + +#define ACR_ASIZE_MASK 0x3 +#define ACR_EW_MASKBIT(30) +#define ACR_SS_MASKBIT(31) +#define ASIZE_16BIT1 + +#define CONFIG_MASK(TA(TA_MAX) | \ + RHOLD(RHOLD_MAX) | \ + RSTROBE(RSTROBE_MAX) | \ + RSETUP(RSETUP_MAX) | \ + WHOLD(WHOLD_MAX) | \ + WSTROBE(WSTROBE_MAX) | \ + WSETUP(WSETUP_MAX) | \ + EW(EW_MAX) | SS(SS_MAX) | \ + ASIZE_MAX) + +/** + * struct
[PATCH v5 1/2] memory: ti-aemif: introduce AEMIF driver
Add new AEMIF driver for EMIF16 Texas Instruments controller. The EMIF16 module is intended to provide a glue-less interface to a variety of asynchronous memory devices like ASRA M, NOR and NAND memory. A total of 256M bytes of any of these memories can be accessed at any given time via 4 chip selects with 64M byte access per chip select. Synchronous memories such as DDR1 SD RAM, SDR SDRAM and Mobile SDR are not supported. This controller is used on SoCs like Davinci, Keysone2 Acked-by: Santosh Shilimkar santosh.shilim...@ti.com Signed-off-by: Murali Karicheri m-kariche...@ti.com Signed-off-by: Ivan Khoronzhuk ivan.khoronz...@ti.com --- drivers/memory/Kconfig| 11 ++ drivers/memory/Makefile | 1 + drivers/memory/ti-aemif.c | 427 ++ 3 files changed, 439 insertions(+) create mode 100644 drivers/memory/ti-aemif.c diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index 29a11db..7bc3982 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -7,6 +7,17 @@ menuconfig MEMORY if MEMORY +config TI_AEMIF + tristate Texas Instruments AEMIF driver + depends on (ARCH_DAVINCI || ARCH_KEYSTONE) OF + help + This driver is for the AEMIF module available in Texas Instruments + SoCs. AEMIF stands for Asynchronous External Memory Interface and + is intended to provide a glue-less interface to a variety of + asynchronuous memory devices like ASRAM, NOR and NAND memory. A total + of 256M bytes of any of these memories can be accessed at a given + time via four chip selects with 64M byte access per chip select. + config TI_EMIF tristate Texas Instruments EMIF driver depends on ARCH_OMAP2PLUS diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index 969d923..d4e150c 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -5,6 +5,7 @@ ifeq ($(CONFIG_DDR),y) obj-$(CONFIG_OF) += of_memory.o endif +obj-$(CONFIG_TI_AEMIF) += ti-aemif.o obj-$(CONFIG_TI_EMIF) += emif.o obj-$(CONFIG_MVEBU_DEVBUS) += mvebu-devbus.o obj-$(CONFIG_TEGRA20_MC) += tegra20-mc.o diff --git a/drivers/memory/ti-aemif.c b/drivers/memory/ti-aemif.c new file mode 100644 index 000..fcc25a1 --- /dev/null +++ b/drivers/memory/ti-aemif.c @@ -0,0 +1,427 @@ +/* + * TI AEMIF driver + * + * Copyright (C) 2010 - 2013 Texas Instruments Incorporated. http://www.ti.com/ + * + * Authors: + * Murali Karicheri m-kariche...@ti.com + * Ivan Khoronzhuk ivan.khoronz...@ti.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include linux/clk.h +#include linux/err.h +#include linux/io.h +#include linux/kernel.h +#include linux/module.h +#include linux/of.h +#include linux/of_platform.h +#include linux/platform_device.h + +#define TA_SHIFT 2 +#define RHOLD_SHIFT4 +#define RSTROBE_SHIFT 7 +#define RSETUP_SHIFT 13 +#define WHOLD_SHIFT17 +#define WSTROBE_SHIFT 20 +#define WSETUP_SHIFT 26 +#define EW_SHIFT 30 +#define SS_SHIFT 31 + +#define TA(x) ((x) TA_SHIFT) +#define RHOLD(x) ((x) RHOLD_SHIFT) +#define RSTROBE(x) ((x) RSTROBE_SHIFT) +#define RSETUP(x) ((x) RSETUP_SHIFT) +#define WHOLD(x) ((x) WHOLD_SHIFT) +#define WSTROBE(x) ((x) WSTROBE_SHIFT) +#define WSETUP(x) ((x) WSETUP_SHIFT) +#define EW(x) ((x) EW_SHIFT) +#define SS(x) ((x) SS_SHIFT) + +#define ASIZE_MAX 0x1 +#define TA_MAX 0x3 +#define RHOLD_MAX 0x7 +#define RSTROBE_MAX0x3f +#define RSETUP_MAX 0xf +#define WHOLD_MAX 0x7 +#define WSTROBE_MAX0x3f +#define WSETUP_MAX 0xf +#define EW_MAX 0x1 +#define SS_MAX 0x1 +#define NUM_CS 4 + +#define TA_VAL(x) (((x) TA(TA_MAX)) TA_SHIFT) +#define RHOLD_VAL(x) (((x) RHOLD(RHOLD_MAX)) RHOLD_SHIFT) +#define RSTROBE_VAL(x) (((x) RSTROBE(RSTROBE_MAX)) RSTROBE_SHIFT) +#define RSETUP_VAL(x) (((x) RSETUP(RSETUP_MAX)) RSETUP_SHIFT) +#define WHOLD_VAL(x) (((x) WHOLD(WHOLD_MAX)) WHOLD_SHIFT) +#define WSTROBE_VAL(x) (((x) WSTROBE(WSTROBE_MAX)) WSTROBE_SHIFT) +#define WSETUP_VAL(x) (((x) WSETUP(WSETUP_MAX)) WSETUP_SHIFT) +#define EW_VAL(x) (((x) EW(EW_MAX)) EW_SHIFT) +#define SS_VAL(x) (((x) SS(SS_MAX)) SS_SHIFT) + +#define NRCSR_OFFSET 0x00 +#define AWCCR_OFFSET 0x04 +#define A1CR_OFFSET0x10 + +#define ACR_ASIZE_MASK 0x3 +#define ACR_EW_MASKBIT(30) +#define ACR_SS_MASKBIT(31) +#define ASIZE_16BIT1 + +#define CONFIG_MASK(TA(TA_MAX) | \ + RHOLD(RHOLD_MAX) | \ + RSTROBE(RSTROBE_MAX) | \ + RSETUP(RSETUP_MAX) | \ + WHOLD(WHOLD_MAX) | \ +
