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authorVikas Manocha <vikas.manocha@st.com>2016-03-09 15:18:13 -0800
committerTom Rini <trini@konsulko.com>2016-03-26 18:49:28 -0400
commit9ecb0c416c68d3105bc9b6607bc8601cab2ecf35 (patch)
tree049e372d9109963019def79dceebaf24d8713c2e /drivers/mtd
parentf9d0fd8a566f78f27a510258c34b3526f9822e92 (diff)
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stm32: stm32f4: move flash driver to mtd driver location
Same flash driver can be used by other stm32 families like stm32f7. Better place for this driver would be mtd driver location. Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/Makefile1
-rw-r--r--drivers/mtd/stm32_flash.c147
-rw-r--r--drivers/mtd/stm32_flash.h27
3 files changed, 175 insertions, 0 deletions
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 7f018a4..703700a 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_FTSMC020) += ftsmc020.o
obj-$(CONFIG_FLASH_CFI_LEGACY) += jedec_flash.o
obj-$(CONFIG_MW_EEPROM) += mw_eeprom.o
obj-$(CONFIG_ST_SMI) += st_smi.o
+obj-$(CONFIG_STM32_FLASH) += stm32_flash.o
diff --git a/drivers/mtd/stm32_flash.c b/drivers/mtd/stm32_flash.c
new file mode 100644
index 0000000..71f4854
--- /dev/null
+++ b/drivers/mtd/stm32_flash.c
@@ -0,0 +1,147 @@
+/*
+ * (C) Copyright 2015
+ * Kamil Lulko, <kamil.lulko@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/stm32.h>
+#include "stm32_flash.h"
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+#define STM32_FLASH ((struct stm32_flash_regs *)FLASH_CNTL_BASE)
+
+void stm32_flash_latency_cfg(int latency)
+{
+ /* 5 wait states, Prefetch enabled, D-Cache enabled, I-Cache enabled */
+ writel(FLASH_ACR_WS(5) | FLASH_ACR_PRFTEN | FLASH_ACR_ICEN
+ | FLASH_ACR_DCEN, &STM32_FLASH->acr);
+}
+
+static void stm32_flash_lock(u8 lock)
+{
+ if (lock) {
+ setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_LOCK);
+ } else {
+ writel(STM32_FLASH_KEY1, &STM32_FLASH->key);
+ writel(STM32_FLASH_KEY2, &STM32_FLASH->key);
+ }
+}
+
+unsigned long flash_init(void)
+{
+ unsigned long total_size = 0;
+ u8 i, j;
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ flash_info[i].flash_id = FLASH_STM32;
+ flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
+ flash_info[i].start[0] = CONFIG_SYS_FLASH_BASE + (i << 20);
+ flash_info[i].size = sect_sz_kb[0];
+ for (j = 1; j < CONFIG_SYS_MAX_FLASH_SECT; j++) {
+ flash_info[i].start[j] = flash_info[i].start[j - 1]
+ + (sect_sz_kb[j - 1]);
+ flash_info[i].size += sect_sz_kb[j];
+ }
+ total_size += flash_info[i].size;
+ }
+
+ return total_size;
+}
+
+void flash_print_info(flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf("missing or unknown FLASH type\n");
+ return;
+ } else if (info->flash_id == FLASH_STM32) {
+ printf("stm32 Embedded Flash\n");
+ }
+
+ printf(" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+
+ printf(" Sector Start Addresses:");
+ for (i = 0; i < info->sector_count; ++i) {
+ if ((i % 5) == 0)
+ printf("\n ");
+ printf(" %08lX%s",
+ info->start[i],
+ info->protect[i] ? " (RO)" : " ");
+ }
+ printf("\n");
+ return;
+}
+
+int flash_erase(flash_info_t *info, int first, int last)
+{
+ u8 bank = 0xFF;
+ int i;
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ if (info == &flash_info[i]) {
+ bank = i;
+ break;
+ }
+ }
+ if (bank == 0xFF)
+ return -1;
+
+ stm32_flash_lock(0);
+
+ for (i = first; i <= last; i++) {
+ while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
+ ;
+
+ /* clear old sector number before writing a new one */
+ clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SNB_MASK);
+
+ if (bank == 0) {
+ setbits_le32(&STM32_FLASH->cr,
+ (i << STM32_FLASH_CR_SNB_OFFSET));
+ } else if (bank == 1) {
+ setbits_le32(&STM32_FLASH->cr,
+ ((0x10 | i) << STM32_FLASH_CR_SNB_OFFSET));
+ } else {
+ stm32_flash_lock(1);
+ return -1;
+ }
+ setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SER);
+ setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_STRT);
+
+ while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
+ ;
+
+ clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SER);
+ }
+
+ stm32_flash_lock(1);
+ return 0;
+}
+
+int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong i;
+
+ while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
+ ;
+
+ stm32_flash_lock(0);
+
+ setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_PG);
+ /* To make things simple use byte writes only */
+ for (i = 0; i < cnt; i++) {
+ *(uchar *)(addr + i) = src[i];
+ while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
+ ;
+ }
+ clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_PG);
+ stm32_flash_lock(1);
+
+ return 0;
+}
diff --git a/drivers/mtd/stm32_flash.h b/drivers/mtd/stm32_flash.h
new file mode 100644
index 0000000..8cb81ef
--- /dev/null
+++ b/drivers/mtd/stm32_flash.h
@@ -0,0 +1,27 @@
+struct stm32_flash_regs {
+ u32 acr;
+ u32 key;
+ u32 optkeyr;
+ u32 sr;
+ u32 cr;
+ u32 optcr;
+ u32 optcr1;
+};
+
+#define STM32_FLASH_KEY1 0x45670123
+#define STM32_FLASH_KEY2 0xCDEF89AB
+
+#define STM32_FLASH_SR_BSY (1 << 16)
+
+#define STM32_FLASH_CR_PG (1 << 0)
+#define STM32_FLASH_CR_SER (1 << 1)
+#define STM32_FLASH_CR_STRT (1 << 16)
+#define STM32_FLASH_CR_LOCK (1 << 31)
+#define STM32_FLASH_CR_SNB_OFFSET 3
+#define STM32_FLASH_CR_SNB_MASK (15 << STM32_FLASH_CR_SNB_OFFSET)
+
+/* Flash ACR: Access control register */
+#define FLASH_ACR_WS(n) n
+#define FLASH_ACR_PRFTEN (1 << 8)
+#define FLASH_ACR_ICEN (1 << 9)
+#define FLASH_ACR_DCEN (1 << 10)