[PATCH 19/22] ARM: beaglebone: add support for beaglebone black with DDR3 RAM
Sascha Hauer
s.hauer at pengutronix.de
Mon Aug 26 02:56:00 EDT 2013
From: Jan Luebbe <jlu at pengutronix.de>
Signed-off-by: Jan Luebbe <jlu at pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/boards/beaglebone/beaglebone.h | 9 ++++++
arch/arm/boards/beaglebone/board.c | 43 +++++++++++++++++++++++--
arch/arm/boards/beaglebone/lowlevel.c | 56 ++++++++++++++++++++++++++++++---
3 files changed, 102 insertions(+), 6 deletions(-)
create mode 100644 arch/arm/boards/beaglebone/beaglebone.h
diff --git a/arch/arm/boards/beaglebone/beaglebone.h b/arch/arm/boards/beaglebone/beaglebone.h
new file mode 100644
index 0000000..25c5b0e
--- /dev/null
+++ b/arch/arm/boards/beaglebone/beaglebone.h
@@ -0,0 +1,9 @@
+#ifndef __BOARD_BEAGLEBONE_H
+#define __BOARD_BEAGLEBONE_H
+
+static inline int is_beaglebone_black(void)
+{
+ return am33xx_get_cpu_rev() != AM335X_ES1_0;
+}
+
+#endif /* __BOARD_BEAGLEBONE_H */
diff --git a/arch/arm/boards/beaglebone/board.c b/arch/arm/boards/beaglebone/board.c
index e12c70b..9e87afc 100644
--- a/arch/arm/boards/beaglebone/board.c
+++ b/arch/arm/boards/beaglebone/board.c
@@ -26,6 +26,8 @@
#include <init.h>
#include <driver.h>
#include <envfs.h>
+#include <environment.h>
+#include <globalvar.h>
#include <sizes.h>
#include <io.h>
#include <ns16550.h>
@@ -49,6 +51,8 @@
#include <mach/am33xx-generic.h>
#include <mach/cpsw.h>
+#include "beaglebone.h"
+
#ifdef CONFIG_DRIVER_SERIAL_NS16550
/**
@@ -71,7 +75,10 @@ console_initcall(beaglebone_console_init);
static int beaglebone_mem_init(void)
{
- omap_add_ram0(SZ_256M);
+ if (is_beaglebone_black())
+ omap_add_ram0(SZ_512M);
+ else
+ omap_add_ram0(SZ_256M);
return 0;
}
@@ -106,19 +113,51 @@ static struct i2c_board_info i2c0_devices[] = {
},
};
+static const __maybe_unused struct module_pin_mux mmc1_pin_mux[] = {
+ {OFFSET(gpmc_ad0), (MODE(1) | RXACTIVE)}, /* MMC1_DAT0 */
+ {OFFSET(gpmc_ad1), (MODE(1) | RXACTIVE)}, /* MMC1_DAT1 */
+ {OFFSET(gpmc_ad2), (MODE(1) | RXACTIVE)}, /* MMC1_DAT2 */
+ {OFFSET(gpmc_ad3), (MODE(1) | RXACTIVE)}, /* MMC1_DAT3 */
+ {OFFSET(gpmc_ad4), (MODE(1) | RXACTIVE)}, /* MMC1_DAT4 */
+ {OFFSET(gpmc_ad5), (MODE(1) | RXACTIVE)}, /* MMC1_DAT5 */
+ {OFFSET(gpmc_ad6), (MODE(1) | RXACTIVE)}, /* MMC1_DAT6 */
+ {OFFSET(gpmc_ad7), (MODE(1) | RXACTIVE)}, /* MMC1_DAT7 */
+ {OFFSET(gpmc_csn1), (MODE(2) | RXACTIVE | PULLUP_EN)}, /* MMC1_CLK */
+ {OFFSET(gpmc_csn2), (MODE(2) | RXACTIVE | PULLUP_EN)}, /* MMC1_CMD */
+ {-1},
+};
+
static int beaglebone_devices_init(void)
{
+ am33xx_enable_mmc0_pin_mux();
am33xx_add_mmc0(NULL);
+ if (is_beaglebone_black()) {
+ configure_module_pin_mux(mmc1_pin_mux);
+ am33xx_add_mmc1(NULL);
+ }
+
am33xx_enable_i2c0_pin_mux();
i2c_register_board_info(0, i2c0_devices, ARRAY_SIZE(i2c0_devices));
am33xx_add_i2c0(NULL);
beaglebone_eth_init();
+ return 0;
+}
+device_initcall(beaglebone_devices_init);
+
+static int beaglebone_env_init(void)
+{
+ int black = is_beaglebone_black();
+
+ globalvar_add_simple("board.variant", black ? "boneblack" : "bone");
+
+ printf("detected 'BeagleBone %s'\n", black ? "Black" : "White");
+
armlinux_set_bootparams((void *)0x80000100);
armlinux_set_architecture(MACH_TYPE_BEAGLEBONE);
return 0;
}
-device_initcall(beaglebone_devices_init);
+late_initcall(beaglebone_env_init);
diff --git a/arch/arm/boards/beaglebone/lowlevel.c b/arch/arm/boards/beaglebone/lowlevel.c
index c0152f3..2ff7c71 100644
--- a/arch/arm/boards/beaglebone/lowlevel.c
+++ b/arch/arm/boards/beaglebone/lowlevel.c
@@ -14,6 +14,8 @@
#include <mach/am33xx-generic.h>
#include <mach/wdt.h>
+#include "beaglebone.h"
+
#define DDR2_RD_DQS 0x12
#define DDR2_PHY_FIFO_WE 0x80
#define DDR2_WR_DQS 0x00
@@ -68,6 +70,38 @@ static const struct am33xx_ddr_data ddr2_data = {
.dll_lock_diff0 = 0x0,
};
+static const struct am33xx_ddr_data ddr3_data = {
+ .rd_slave_ratio0 = 0x38,
+ .wr_dqs_slave_ratio0 = 0x44,
+ .fifo_we_slave_ratio0 = 0x94,
+ .wr_slave_ratio0 = 0x7D,
+ .use_rank0_delay = 0x01,
+ .dll_lock_diff0 = 0x0,
+};
+
+static const struct am33xx_cmd_control ddr3_cmd_ctrl = {
+ .slave_ratio0 = 0x80,
+ .dll_lock_diff0 = 0x1,
+ .invert_clkout0 = 0x0,
+ .slave_ratio1 = 0x80,
+ .dll_lock_diff1 = 0x1,
+ .invert_clkout1 = 0x0,
+ .slave_ratio2 = 0x80,
+ .dll_lock_diff2 = 0x1,
+ .invert_clkout2 = 0x0,
+};
+
+static const struct am33xx_emif_regs ddr3_regs = {
+ .emif_read_latency = 0x100007,
+ .emif_tim1 = 0x0AAAD4DB,
+ .emif_tim2 = 0x266B7FDA,
+ .emif_tim3 = 0x501F867F,
+ .zq_config = 0x50074BE4,
+ .sdram_config = 0x61C05332,
+ .sdram_config2 = 0x0,
+ .sdram_ref_ctrl = 0xC30,
+};
+
/**
* @brief The basic entry point for board initialization.
*
@@ -90,9 +124,16 @@ static int beaglebone_board_init(void)
if (running_in_sdram())
return 0;
- pll_init(MPUPLL_M_500, 24, DDRPLL_M_266);
-
- am335x_sdram_init(0x18B, &ddr2_cmd_ctrl, &ddr2_regs, &ddr2_data);
+ /* Setup the PLLs and the clocks for the peripherals */
+ if (is_beaglebone_black()) {
+ pll_init(MPUPLL_M_500, 24, DDRPLL_M_400);
+ am335x_sdram_init(0x18B, &ddr3_cmd_ctrl, &ddr3_regs,
+ &ddr3_data);
+ } else {
+ pll_init(MPUPLL_M_500, 24, DDRPLL_M_266);
+ am335x_sdram_init(0x18B, &ddr2_cmd_ctrl, &ddr2_regs,
+ &ddr2_data);
+ }
am33xx_uart0_soft_reset();
am33xx_enable_uart0_pin_mux();
@@ -104,11 +145,18 @@ static int beaglebone_board_init(void)
void __bare_init __naked barebox_arm_reset_vector(uint32_t *data)
{
+ unsigned sdram;
+
am33xx_save_bootinfo(data);
arm_cpu_lowlevel_init();
beaglebone_board_init();
- barebox_arm_entry(0x80000000, SZ_256M, 0);
+ if (is_beaglebone_black())
+ sdram = SZ_512M;
+ else
+ sdram = SZ_256M;
+
+ barebox_arm_entry(0x80000000, sdram, 0);
}
--
1.8.4.rc3
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