[PATCH V2 40/69] ST SPEAr : FSMC (Flexible Static Memory Controller) NOR interface driver
Viresh KUMAR
viresh.kumar at st.com
Fri Oct 1 07:56:00 EDT 2010
From: Vipin Kumar <vipin.kumar at st.com>
SPEAr1300 SoC supports FSMC to interface with various memories
(NOR/NAND/SRAM). This patch adds the support for FSMC over NOR interface.
The driver being used is driver/mtd/maps/physmap.c
Signed-off-by: Vipin Kumar <vipin.kumar at st.com>
Signed-off-by: shiraz hashim <shiraz.hashim at st.com>
Signed-off-by: Viresh Kumar <viresh.kumar at st.com>
---
arch/arm/mach-spear13xx/Makefile | 2 +-
arch/arm/mach-spear13xx/fsmc-nor.c | 85 ++++++++++++++++++++++++
arch/arm/mach-spear13xx/include/mach/generic.h | 1 +
arch/arm/mach-spear13xx/spear1300_evb.c | 17 +++++
arch/arm/mach-spear13xx/spear1310_evb.c | 17 +++++
arch/arm/mach-spear13xx/spear13xx.c | 20 ++++++
arch/arm/plat-spear/include/plat/fsmc.h | 15 ++++
include/mtd/fsmc.h | 2 +
8 files changed, 158 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-spear13xx/fsmc-nor.c
diff --git a/arch/arm/mach-spear13xx/Makefile b/arch/arm/mach-spear13xx/Makefile
index 838405a..9312fcd 100644
--- a/arch/arm/mach-spear13xx/Makefile
+++ b/arch/arm/mach-spear13xx/Makefile
@@ -3,7 +3,7 @@
#
# common files
-obj-y += spear13xx.o clock.o
+obj-y += spear13xx.o clock.o fsmc-nor.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o
obj-$(CONFIG_PCIEPORTBUS) += pcie.o
diff --git a/arch/arm/mach-spear13xx/fsmc-nor.c b/arch/arm/mach-spear13xx/fsmc-nor.c
new file mode 100644
index 0000000..03234b6
--- /dev/null
+++ b/arch/arm/mach-spear13xx/fsmc-nor.c
@@ -0,0 +1,85 @@
+/*
+ * arch/arm/mach-spear13xx/fsmc-nor.c
+ *
+ * FSMC (Flexible Static Memory Controller) interface for NOR
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Vipin Kumar<vipin.kumar at st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <plat/fsmc.h>
+
+int __init fsmc_nor_init(struct platform_device *pdev, unsigned long base,
+ u32 bank, u32 width)
+{
+ void __iomem *fsmc_nor_base;
+ struct fsmc_regs *regs;
+ struct clk *clk;
+ int ret;
+ u32 ctrl;
+
+ if (bank > (FSMC_MAX_NOR_BANKS - 1))
+ return -EINVAL;
+
+ fsmc_nor_base = ioremap(base, FSMC_NOR_REG_SIZE);
+ if (!fsmc_nor_base)
+ return -ENOMEM;
+
+ clk = clk_get(NULL, "fsmc");
+ if (IS_ERR(clk)) {
+ iounmap(fsmc_nor_base);
+ return PTR_ERR(clk);
+ }
+
+ ret = clk_enable(clk);
+ if (ret) {
+ iounmap(fsmc_nor_base);
+ return ret;
+ }
+
+ regs = (struct fsmc_regs *)fsmc_nor_base;
+
+ ctrl = WAIT_ENB | WRT_ENABLE | WPROT | NOR_DEV | BANK_ENABLE;
+
+ switch (width) {
+ case FSMC_FLASH_WIDTH8:
+ ctrl |= WIDTH_8;
+ break;
+
+ case FSMC_FLASH_WIDTH16:
+ ctrl |= WIDTH_16;
+ break;
+
+ case FSMC_FLASH_WIDTH32:
+ ctrl |= WIDTH_32;
+ break;
+
+ default:
+ ctrl |= WIDTH_8;
+ break;
+ }
+
+ writel(ctrl, ®s->nor_bank_regs[bank].ctrl);
+ writel(0x0FFFFFFF, ®s->nor_bank_regs[bank].ctrl_tim);
+ writel(ctrl | RSTPWRDWN, ®s->nor_bank_regs[bank].ctrl);
+
+ iounmap(fsmc_nor_base);
+
+ return 0;
+}
+
+void __init fsmc_init_board_info(struct platform_device *pdev,
+ struct mtd_partition *partitions, unsigned int nr_partitions,
+ unsigned int width)
+{
+ fsmc_nor_set_plat_data(pdev, partitions, nr_partitions, width);
+}
diff --git a/arch/arm/mach-spear13xx/include/mach/generic.h b/arch/arm/mach-spear13xx/include/mach/generic.h
index cd54e62..9b0f009 100644
--- a/arch/arm/mach-spear13xx/include/mach/generic.h
+++ b/arch/arm/mach-spear13xx/include/mach/generic.h
@@ -34,6 +34,7 @@ extern struct amba_device spear13xx_ssp_device;
extern struct amba_device spear13xx_uart_device;
extern struct platform_device spear13xx_ehci0_device;
extern struct platform_device spear13xx_ehci1_device;
+extern struct platform_device spear13xx_fsmc_nor_device;
extern struct platform_device spear13xx_i2c_device;
extern struct platform_device spear13xx_kbd_device;
extern struct platform_device spear13xx_nand_device;
diff --git a/arch/arm/mach-spear13xx/spear1300_evb.c b/arch/arm/mach-spear13xx/spear1300_evb.c
index 269d9b0..e56fbd4 100644
--- a/arch/arm/mach-spear13xx/spear1300_evb.c
+++ b/arch/arm/mach-spear13xx/spear1300_evb.c
@@ -22,11 +22,21 @@
#include <mach/generic.h>
#include <mach/spear.h>
#include <mach/pcie.h>
+#include <plat/fsmc.h>
#include <plat/keyboard.h>
#include <plat/fsmc.h>
#include <plat/smi.h>
#include <plat/spi.h>
+#define PARTITION(n, off, sz) {.name = n, .offset = off, .size = sz}
+
+static struct mtd_partition partition_info[] = {
+ PARTITION("X-loader", 0, 1 * 0x20000),
+ PARTITION("U-Boot", 0x20000, 3 * 0x20000),
+ PARTITION("Kernel", 0x80000, 24 * 0x20000),
+ PARTITION("Root File System", 0x380000, 84 * 0x20000),
+};
+
static struct amba_device *amba_devs[] __initdata = {
&spear13xx_gpio_device[0],
&spear13xx_gpio_device[1],
@@ -114,6 +124,13 @@ static void __init spear1300_evb_init(void)
enable_pcie0_clk();
pcie_init(&spear1300_pcie_port_is_host);
#endif
+ /* initialize fsmc related data in fsmc plat data */
+ fsmc_init_board_info(&spear13xx_fsmc_nor_device, partition_info,
+ ARRAY_SIZE(partition_info), FSMC_FLASH_WIDTH8);
+
+ /* Initialize fsmc regiters */
+ fsmc_nor_init(&spear13xx_fsmc_nor_device, SPEAR13XX_FSMC_BASE, 0,
+ FSMC_FLASH_WIDTH8);
/* Add Platform Devices */
platform_add_devices(plat_devs, ARRAY_SIZE(plat_devs));
diff --git a/arch/arm/mach-spear13xx/spear1310_evb.c b/arch/arm/mach-spear13xx/spear1310_evb.c
index c1227bc..f6b4323 100644
--- a/arch/arm/mach-spear13xx/spear1310_evb.c
+++ b/arch/arm/mach-spear13xx/spear1310_evb.c
@@ -27,6 +27,15 @@
#include <plat/smi.h>
#include <plat/spi.h>
+#define PARTITION(n, off, sz) {.name = n, .offset = off, .size = sz}
+
+static struct mtd_partition partition_info[] = {
+ PARTITION("X-loader", 0, 1 * 0x20000),
+ PARTITION("U-Boot", 0x20000, 3 * 0x20000),
+ PARTITION("Kernel", 0x80000, 24 * 0x20000),
+ PARTITION("Root File System", 0x380000, 84 * 0x20000),
+};
+
static struct amba_device *amba_devs[] __initdata = {
/* spear13xx specific devices */
&spear13xx_gpio_device[0],
@@ -115,6 +124,14 @@ static void __init spear1310_evb_init(void)
/* initialize serial nor related data in smi plat data */
smi_init_board_info(&spear13xx_smi_device);
+ /* initialize fsmc related data in fsmc plat data */
+ fsmc_init_board_info(&spear13xx_fsmc_nor_device, partition_info,
+ ARRAY_SIZE(partition_info), FSMC_FLASH_WIDTH8);
+
+ /* Initialize fsmc regiters */
+ fsmc_nor_init(&spear13xx_fsmc_nor_device, SPEAR13XX_FSMC_BASE, 0,
+ FSMC_FLASH_WIDTH8);
+
#ifdef CONFIG_PCIEPORTBUS
/* Enable PCIE0 clk */
enable_pcie0_clk();
diff --git a/arch/arm/mach-spear13xx/spear13xx.c b/arch/arm/mach-spear13xx/spear13xx.c
index 76920ec..cdf132e 100644
--- a/arch/arm/mach-spear13xx/spear13xx.c
+++ b/arch/arm/mach-spear13xx/spear13xx.c
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/amba/pl022.h>
#include <linux/amba/pl061.h>
+#include <linux/mtd/physmap.h>
#include <linux/ptrace.h>
#include <linux/io.h>
#include <mtd/fsmc.h>
@@ -130,6 +131,25 @@ struct platform_device spear13xx_i2c_device = {
.resource = i2c_resources,
};
+/* fsmc nor flash device registeration */
+static struct physmap_flash_data fsmc_norflash_data;
+
+static struct resource fsmc_nor_resources[] = {
+ {
+ .start = SPEAR13XX_FSMC_MEM_BASE,
+ .end = SPEAR13XX_FSMC_MEM_BASE + SZ_16M - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct platform_device spear13xx_fsmc_nor_device = {
+ .name = "physmap-flash",
+ .id = -1,
+ .resource = fsmc_nor_resources,
+ .num_resources = ARRAY_SIZE(fsmc_nor_resources),
+ .dev.platform_data = &fsmc_norflash_data,
+};
+
/* nand device registeration */
void __init nand_mach_init(u32 busw)
{
diff --git a/arch/arm/plat-spear/include/plat/fsmc.h b/arch/arm/plat-spear/include/plat/fsmc.h
index bb161fb..6ecf2e7 100644
--- a/arch/arm/plat-spear/include/plat/fsmc.h
+++ b/arch/arm/plat-spear/include/plat/fsmc.h
@@ -14,6 +14,7 @@
#ifndef __PLAT_FSMC_H
#define __PLAT_FSMC_H
+#include <linux/mtd/physmap.h>
#include <mtd/fsmc.h>
/* This function is used to set platform data field of pdev->dev */
@@ -33,4 +34,18 @@ static inline void fsmc_nand_set_plat_data(struct platform_device *pdev,
plat_data->width = width;
}
+static inline void fsmc_nor_set_plat_data(struct platform_device *pdev,
+ struct mtd_partition *partitions, unsigned int nr_partitions,
+ unsigned int width)
+{
+ struct physmap_flash_data *plat_data;
+ plat_data = dev_get_platdata(&pdev->dev);
+
+ if (partitions) {
+ plat_data->parts = partitions;
+ plat_data->nr_parts = nr_partitions;
+ }
+
+ plat_data->width = width;
+}
#endif /* __PLAT_FSMC_H */
diff --git a/include/mtd/fsmc.h b/include/mtd/fsmc.h
index 7b8921b..95725d9 100644
--- a/include/mtd/fsmc.h
+++ b/include/mtd/fsmc.h
@@ -44,6 +44,7 @@
#define FSMC_FLASH_WIDTH8 1
#define FSMC_FLASH_WIDTH16 2
+#define FSMC_FLASH_WIDTH32 4
struct fsmc_nor_bank_regs {
u32 ctrl;
@@ -56,6 +57,7 @@ struct fsmc_nor_bank_regs {
#define NOR_DEV (2 << 2)
#define WIDTH_8 (0 << 4)
#define WIDTH_16 (1 << 4)
+#define WIDTH_32 (2 << 4)
#define RSTPWRDWN (1 << 6)
#define WPROT (1 << 7)
#define WRT_ENABLE (1 << 12)
--
1.7.2.2
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