[U-Boot] [PATCH v3] AT91SAM9XE: add embedded flash support
Add support for the embedded flash in the AT91SAM9XE128/256/512 SoCs:
- Environment can be put into that flash
- U-Boot can be in that flash
- Commands cp and protect are supported
Signed-off-by: Reinhard Meyer reinhard.me...@emk-elektronik.de
---
Rebased and cosmetical cleanups
arch/arm/cpu/arm926ejs/at91/Makefile |1 +
arch/arm/cpu/arm926ejs/at91/eflash.c | 271
arch/arm/include/asm/arch-at91/at91_dbu.h | 41 +
arch/arm/include/asm/arch-at91/at91_eefc.h | 51 ++
4 files changed, 364 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/cpu/arm926ejs/at91/eflash.c
create mode 100644 arch/arm/include/asm/arch-at91/at91_dbu.h
create mode 100644 arch/arm/include/asm/arch-at91/at91_eefc.h
diff --git a/arch/arm/cpu/arm926ejs/at91/Makefile
b/arch/arm/cpu/arm926ejs/at91/Makefile
index 4f467be..def3980 100644
--- a/arch/arm/cpu/arm926ejs/at91/Makefile
+++ b/arch/arm/cpu/arm926ejs/at91/Makefile
@@ -34,6 +34,7 @@ COBJS-$(CONFIG_AT91SAM9263) += at91sam9263_devices.o
COBJS-$(CONFIG_AT91SAM9RL) += at91sam9rl_devices.o
COBJS-$(CONFIG_AT91SAM9M10G45) += at91sam9m10g45_devices.o
COBJS-$(CONFIG_AT91SAM9G45)+= at91sam9m10g45_devices.o
+COBJS-$(CONFIG_AT91_EFLASH)+= eflash.o
COBJS-$(CONFIG_AT91_LED) += led.o
COBJS-y += clock.o
COBJS-y += cpu.o
diff --git a/arch/arm/cpu/arm926ejs/at91/eflash.c
b/arch/arm/cpu/arm926ejs/at91/eflash.c
new file mode 100644
index 000..2e851db
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/at91/eflash.c
@@ -0,0 +1,271 @@
+/*
+ * (C) Copyright 2010
+ * Reinhard Meyer, EMK Elektronik, reinhard.me...@emk-elektronik.de
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * this driver supports the enhanced embedded flash in the Atmel
+ * AT91SAM9XE devices with the following geometry:
+ *
+ * AT91SAM9XE128: 1 plane of 8 regions of 32 pages (total 256 pages)
+ * AT91SAM9XE256: 1 plane of 16 regions of 32 pages (total 512 pages)
+ * AT91SAM9XE512: 1 plane of 32 regions of 32 pages (total 1024 pages)
+ * (the exact geometry is read from the flash at runtime, so any
+ * future devices should already be covered)
+ *
+ * Regions can be write/erase protected.
+ * Whole (!) pages can be individually written with erase on the fly.
+ * Writing partial pages will corrupt the rest of the page.
+ *
+ * The flash is presented to u-boot with each region being a sector,
+ * having the following effects:
+ * Each sector can be hardware protected (protect on/off).
+ * Each page in a sector can be rewritten anytime.
+ * Since pages are erased when written, the erase does nothing.
+ * The first CONFIG_EFLASH_PROTSECTORS cannot be unprotected
+ * by u-Boot commands.
+ *
+ * Note: Redundant environment will not work in this flash since
+ * it does use partial page writes. Make sure the environent spans
+ * whole pages!
+ */
+
+/*
+ * optional TODOs (nice to have features):
+ *
+ * make the driver coexist with other NOR flash drivers
+ * (use an index into flash_info[], requires work
+ * in those other drivers, too)
+ * Make the erase command fill the sectors with 0xff
+ * (if the flashes grow larger in the future and
+ * someone puts a jffs2 into them)
+ * do a read-modify-write for partially programmed pages
+ */
+#include common.h
+#include asm/arch/hardware.h
+#include asm/arch/io.h
+#include asm/arch/at91_common.h
+#include asm/arch/at91_eefc.h
+#include asm/arch/at91_dbu.h
+
+/* checks to detect configuration errors */
+#if CONFIG_SYS_MAX_FLASH_BANKS!=1
+#error eflash: this driver can only handle 1 bank
+#endif
+
+/* global structure */
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+static u32 pagesize;
+
+unsigned long flash_init (void)
+{
+ at91_eefc_t *eefc = (at91_eefc_t *) 0xfa00;
+ at91_dbu_t *dbu = (at91_dbu_t *) 0xf200;
+ u32 id, size, nplanes, planesize, nlocks;
+ u32 addr, i, tmp=0;
+
+ debug(eflash: init\n);
+
+ flash_info[0].flash_id = FLASH_UNKNOWN;
+
+ /* check if its an AT91ARM9XE SoC */
+ if ((readl(dbu-cidr) AT91_DBU_CID_ARCH_MASK) !=
AT91_DBU_CID_ARCH_9XExx) {
+ puts(eflash: not an AT91SAM9XE\n);
+ return 0;
+ }
+
+ /* now
[U-Boot] [PATCH v3] AT91SAM9XE: add embedded flash support
Add support for the embedded flash in the AT91SAM9XE128/256/512 SoCs:
- Environment can be put into that flash
- U-Boot can be in that flash
- Commands cp and protect are supported
Signed-off-by: Reinhard Meyer reinhard.me...@emk-elektronik.de
---
arch/arm/cpu/arm926ejs/at91/Makefile |1 +
arch/arm/cpu/arm926ejs/at91/eflash.c | 271
arch/arm/include/asm/arch-at91/at91_dbu.h | 41 +
arch/arm/include/asm/arch-at91/at91_eefc.h | 51 ++
4 files changed, 364 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/cpu/arm926ejs/at91/eflash.c
create mode 100644 arch/arm/include/asm/arch-at91/at91_dbu.h
create mode 100644 arch/arm/include/asm/arch-at91/at91_eefc.h
diff --git a/arch/arm/cpu/arm926ejs/at91/Makefile
b/arch/arm/cpu/arm926ejs/at91/Makefile
index 4f467be..def3980 100644
--- a/arch/arm/cpu/arm926ejs/at91/Makefile
+++ b/arch/arm/cpu/arm926ejs/at91/Makefile
@@ -34,6 +34,7 @@ COBJS-$(CONFIG_AT91SAM9263) += at91sam9263_devices.o
COBJS-$(CONFIG_AT91SAM9RL) += at91sam9rl_devices.o
COBJS-$(CONFIG_AT91SAM9M10G45) += at91sam9m10g45_devices.o
COBJS-$(CONFIG_AT91SAM9G45)+= at91sam9m10g45_devices.o
+COBJS-$(CONFIG_AT91_EFLASH)+= eflash.o
COBJS-$(CONFIG_AT91_LED) += led.o
COBJS-y += clock.o
COBJS-y += cpu.o
diff --git a/arch/arm/cpu/arm926ejs/at91/eflash.c
b/arch/arm/cpu/arm926ejs/at91/eflash.c
new file mode 100644
index 000..2e851db
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/at91/eflash.c
@@ -0,0 +1,271 @@
+/*
+ * (C) Copyright 2010
+ * Reinhard Meyer, EMK Elektronik, reinhard.me...@emk-elektronik.de
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * this driver supports the enhanced embedded flash in the Atmel
+ * AT91SAM9XE devices with the following geometry:
+ *
+ * AT91SAM9XE128: 1 plane of 8 regions of 32 pages (total 256 pages)
+ * AT91SAM9XE256: 1 plane of 16 regions of 32 pages (total 512 pages)
+ * AT91SAM9XE512: 1 plane of 32 regions of 32 pages (total 1024 pages)
+ * (the exact geometry is read from the flash at runtime, so any
+ * future devices should already be covered)
+ *
+ * Regions can be write/erase protected.
+ * Whole (!) pages can be individually written with erase on the fly.
+ * Writing partial pages will corrupt the rest of the page.
+ *
+ * The flash is presented to u-boot with each region being a sector,
+ * having the following effects:
+ * Each sector can be hardware protected (protect on/off).
+ * Each page in a sector can be rewritten anytime.
+ * Since pages are erased when written, the erase does nothing.
+ * The first CONFIG_EFLASH_PROTSECTORS cannot be unprotected
+ * by u-Boot commands.
+ *
+ * Note: Redundant environment will not work in this flash since
+ * it does use partial page writes. Make sure the environent spans
+ * whole pages!
+ */
+
+/*
+ * optional TODOs (nice to have features):
+ *
+ * make the driver coexist with other NOR flash drivers
+ * (use an index into flash_info[], requires work
+ * in those other drivers, too)
+ * Make the erase command fill the sectors with 0xff
+ * (if the flashes grow larger in the future and
+ * someone puts a jffs2 into them)
+ * do a read-modify-write for partially programmed pages
+ */
+#include common.h
+#include asm/arch/hardware.h
+#include asm/arch/io.h
+#include asm/arch/at91_common.h
+#include asm/arch/at91_eefc.h
+#include asm/arch/at91_dbu.h
+
+/* checks to detect configuration errors */
+#if CONFIG_SYS_MAX_FLASH_BANKS!=1
+#error eflash: this driver can only handle 1 bank
+#endif
+
+/* global structure */
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+static u32 pagesize;
+
+unsigned long flash_init (void)
+{
+ at91_eefc_t *eefc = (at91_eefc_t *) 0xfa00;
+ at91_dbu_t *dbu = (at91_dbu_t *) 0xf200;
+ u32 id, size, nplanes, planesize, nlocks;
+ u32 addr, i, tmp=0;
+
+ debug(eflash: init\n);
+
+ flash_info[0].flash_id = FLASH_UNKNOWN;
+
+ /* check if its an AT91ARM9XE SoC */
+ if ((readl(dbu-cidr) AT91_DBU_CID_ARCH_MASK) !=
AT91_DBU_CID_ARCH_9XExx) {
+ puts(eflash: not an AT91SAM9XE\n);
+ return 0;
+ }
+
+ /* now query the eflash for its
