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https://github.com/AsahiLinux/u-boot
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omap4: add sdram init support
Add support for the SDRAM controller (EMIF). Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Aneesh V
U-Boot
parent
3776801d0a
commit
2ae610f030
8 changed files with 1500 additions and 7 deletions
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@ -29,7 +29,9 @@ SOBJS += lowlevel_init.o
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COBJS += board.o
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COBJS += clocks.o
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COBJS += emif.o
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COBJS += mem.o
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COBJS += sdram_elpida.o
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COBJS += sys_info.o
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SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
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@ -189,7 +189,7 @@ void watchdog_init(void)
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* This is needed because the size of memory installed may be
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* different on different versions of the board
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*/
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u32 sdram_size(void)
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u32 omap4_sdram_size(void)
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{
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u32 section, i, total_size = 0, size, addr;
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for (i = 0; i < 4; i++) {
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@ -215,8 +215,8 @@ u32 sdram_size(void)
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*/
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int dram_init(void)
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{
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gd->ram_size = sdram_size();
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sdram_init();
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gd->ram_size = omap4_sdram_size();
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return 0;
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}
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328
arch/arm/cpu/armv7/omap4/emif.c
Normal file
328
arch/arm/cpu/armv7/omap4/emif.c
Normal file
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@ -0,0 +1,328 @@
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/*
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* EMIF programming
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*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* Aneesh V <aneesh@ti.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/arch/emif.h>
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#include <asm/arch/clocks.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/omap_common.h>
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#include <asm/utils.h>
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static inline u32 emif_num(u32 base)
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{
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if (base == OMAP44XX_EMIF1)
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return 1;
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else if (base == OMAP44XX_EMIF2)
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return 2;
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else
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return 0;
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}
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static inline u32 get_mr(u32 base, u32 cs, u32 mr_addr)
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{
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u32 mr;
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struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
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mr_addr |= cs << OMAP44XX_REG_CS_SHIFT;
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writel(mr_addr, &emif->emif_lpddr2_mode_reg_cfg);
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if (omap_revision() == OMAP4430_ES2_0)
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mr = readl(&emif->emif_lpddr2_mode_reg_data_es2);
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else
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mr = readl(&emif->emif_lpddr2_mode_reg_data);
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debug("get_mr: EMIF%d cs %d mr %08x val 0x%x\n", emif_num(base),
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cs, mr_addr, mr);
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return mr;
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}
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static inline void set_mr(u32 base, u32 cs, u32 mr_addr, u32 mr_val)
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{
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struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
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mr_addr |= cs << OMAP44XX_REG_CS_SHIFT;
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writel(mr_addr, &emif->emif_lpddr2_mode_reg_cfg);
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writel(mr_val, &emif->emif_lpddr2_mode_reg_data);
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}
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void emif_reset_phy(u32 base)
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{
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struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
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u32 iodft;
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iodft = readl(&emif->emif_iodft_tlgc);
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iodft |= OMAP44XX_REG_RESET_PHY_MASK;
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writel(iodft, &emif->emif_iodft_tlgc);
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}
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static void do_lpddr2_init(u32 base, u32 cs)
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{
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u32 mr_addr;
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/* Wait till device auto initialization is complete */
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while (get_mr(base, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
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;
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set_mr(base, cs, LPDDR2_MR10, MR10_ZQ_ZQINIT);
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/*
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* tZQINIT = 1 us
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* Enough loops assuming a maximum of 2GHz
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*/
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sdelay(2000);
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set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_3);
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set_mr(base, cs, LPDDR2_MR16, MR16_REF_FULL_ARRAY);
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/*
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* Enable refresh along with writing MR2
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* Encoding of RL in MR2 is (RL - 2)
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*/
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mr_addr = LPDDR2_MR2 | OMAP44XX_REG_REFRESH_EN_MASK;
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set_mr(base, cs, mr_addr, RL_FINAL - 2);
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}
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static void lpddr2_init(u32 base, const struct emif_regs *regs)
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{
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struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
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/* Not NVM */
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clrbits_le32(&emif->emif_lpddr2_nvm_config, OMAP44XX_REG_CS1NVMEN_MASK);
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/*
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* Keep REG_INITREF_DIS = 1 to prevent re-initialization of SDRAM
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* when EMIF_SDRAM_CONFIG register is written
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*/
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setbits_le32(&emif->emif_sdram_ref_ctrl, OMAP44XX_REG_INITREF_DIS_MASK);
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/*
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* Set the SDRAM_CONFIG and PHY_CTRL for the
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* un-locked frequency & default RL
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*/
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writel(regs->sdram_config_init, &emif->emif_sdram_config);
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writel(regs->emif_ddr_phy_ctlr_1_init, &emif->emif_ddr_phy_ctrl_1);
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do_lpddr2_init(base, CS0);
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if (regs->sdram_config & OMAP44XX_REG_EBANK_MASK)
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do_lpddr2_init(base, CS1);
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writel(regs->sdram_config, &emif->emif_sdram_config);
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writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1);
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/* Enable refresh now */
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clrbits_le32(&emif->emif_sdram_ref_ctrl, OMAP44XX_REG_INITREF_DIS_MASK);
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}
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static void emif_update_timings(u32 base, const struct emif_regs *regs)
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{
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struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
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writel(regs->ref_ctrl, &emif->emif_sdram_ref_ctrl_shdw);
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writel(regs->sdram_tim1, &emif->emif_sdram_tim_1_shdw);
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writel(regs->sdram_tim2, &emif->emif_sdram_tim_2_shdw);
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writel(regs->sdram_tim3, &emif->emif_sdram_tim_3_shdw);
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if (omap_revision() == OMAP4430_ES1_0) {
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/* ES1 bug EMIF should be in force idle during freq_update */
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writel(0, &emif->emif_pwr_mgmt_ctrl);
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} else {
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writel(EMIF_PWR_MGMT_CTRL, &emif->emif_pwr_mgmt_ctrl);
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writel(EMIF_PWR_MGMT_CTRL_SHDW, &emif->emif_pwr_mgmt_ctrl_shdw);
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}
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writel(regs->read_idle_ctrl, &emif->emif_read_idlectrl_shdw);
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writel(regs->zq_config, &emif->emif_zq_config);
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writel(regs->temp_alert_config, &emif->emif_temp_alert_config);
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writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1_shdw);
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/*
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* Workaround:
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* In a specific situation, the OCP interface between the DMM and
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* EMIF may hang.
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* 1. A TILER port is used to perform 2D burst writes of
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* width 1 and height 8
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* 2. ELLAn port is used to perform reads
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* 3. All accesses are routed to the same EMIF controller
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*
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* Work around to avoid this issue REG_SYS_THRESH_MAX value should
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* be kept higher than default 0x7. As per recommondation 0x0A will
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* be used for better performance with REG_LL_THRESH_MAX = 0x00
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*/
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if (omap_revision() == OMAP4430_ES1_0) {
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writel(EMIF_L3_CONFIG_VAL_SYS_THRESH_0A_LL_THRESH_00,
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&emif->emif_l3_config);
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}
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}
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static void do_sdram_init(u32 base)
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{
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const struct emif_regs *regs;
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u32 in_sdram, emif_nr;
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debug(">>do_sdram_init() %x\n", base);
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in_sdram = running_from_sdram();
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emif_nr = (base == OMAP44XX_EMIF1) ? 1 : 2;
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emif_get_reg_dump(emif_nr, ®s);
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if (!regs) {
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debug("EMIF: reg dump not provided\n");
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return;
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}
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/*
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* Initializing the LPDDR2 device can not happen from SDRAM.
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* Changing the timing registers in EMIF can happen(going from one
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* OPP to another)
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*/
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if (!in_sdram)
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lpddr2_init(base, regs);
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/* Write to the shadow registers */
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emif_update_timings(base, regs);
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debug("<<do_sdram_init() %x\n", base);
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}
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void sdram_init_pads(void)
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{
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u32 lpddr2io;
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struct control_lpddr2io_regs *lpddr2io_regs =
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(struct control_lpddr2io_regs *)LPDDR2_IO_REGS_BASE;
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u32 omap4_rev = omap_revision();
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if (omap4_rev == OMAP4430_ES1_0)
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lpddr2io = CONTROL_LPDDR2IO_SLEW_125PS_DRV8_PULL_DOWN;
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else if (omap4_rev == OMAP4430_ES2_0)
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lpddr2io = CONTROL_LPDDR2IO_SLEW_325PS_DRV8_GATE_KEEPER;
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else
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return; /* Post ES2.1 reset values will work */
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writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_0);
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writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_1);
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writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_2);
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writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_0);
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writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_1);
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writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_2);
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writel(CONTROL_EFUSE_2_NMOS_PMOS_PTV_CODE_1, CONTROL_EFUSE_2);
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}
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static void emif_post_init_config(u32 base)
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{
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struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
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u32 omap4_rev = omap_revision();
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/* reset phy on ES2.0 */
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if (omap4_rev == OMAP4430_ES2_0)
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emif_reset_phy(base);
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/* Put EMIF back in smart idle on ES1.0 */
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if (omap4_rev == OMAP4430_ES1_0)
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writel(0x80000000, &emif->emif_pwr_mgmt_ctrl);
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}
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static void dmm_init(u32 base)
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{
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const struct dmm_lisa_map_regs *lisa_map_regs;
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emif_get_dmm_regs(&lisa_map_regs);
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struct dmm_lisa_map_regs *hw_lisa_map_regs =
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(struct dmm_lisa_map_regs *)base;
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writel(0, &hw_lisa_map_regs->dmm_lisa_map_3);
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writel(0, &hw_lisa_map_regs->dmm_lisa_map_2);
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writel(0, &hw_lisa_map_regs->dmm_lisa_map_1);
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writel(0, &hw_lisa_map_regs->dmm_lisa_map_0);
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writel(lisa_map_regs->dmm_lisa_map_3,
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&hw_lisa_map_regs->dmm_lisa_map_3);
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writel(lisa_map_regs->dmm_lisa_map_2,
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&hw_lisa_map_regs->dmm_lisa_map_2);
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writel(lisa_map_regs->dmm_lisa_map_1,
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&hw_lisa_map_regs->dmm_lisa_map_1);
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writel(lisa_map_regs->dmm_lisa_map_0,
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&hw_lisa_map_regs->dmm_lisa_map_0);
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}
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/*
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* SDRAM initialization:
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* SDRAM initialization has two parts:
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* 1. Configuring the SDRAM device
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* 2. Update the AC timings related parameters in the EMIF module
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* (1) should be done only once and should not be done while we are
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* running from SDRAM.
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* (2) can and should be done more than once if OPP changes.
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* Particularly, this may be needed when we boot without SPL and
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* and using Configuration Header(CH). ROM code supports only at 50% OPP
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* at boot (low power boot). So u-boot has to switch to OPP100 and update
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* the frequency. So,
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* Doing (1) and (2) makes sense - first time initialization
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* Doing (2) and not (1) makes sense - OPP change (when using CH)
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* Doing (1) and not (2) doen't make sense
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* See do_sdram_init() for the details
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*/
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void sdram_init(void)
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{
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u32 in_sdram, size_prog, size_detect;
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debug(">>sdram_init()\n");
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if (omap4_hw_init_context() == OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL)
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return;
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in_sdram = running_from_sdram();
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debug("in_sdram = %d\n", in_sdram);
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if (!in_sdram) {
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sdram_init_pads();
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bypass_dpll(&prcm->cm_clkmode_dpll_core);
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}
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do_sdram_init(OMAP44XX_EMIF1);
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do_sdram_init(OMAP44XX_EMIF2);
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if (!in_sdram) {
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dmm_init(OMAP44XX_DMM_LISA_MAP_BASE);
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emif_post_init_config(OMAP44XX_EMIF1);
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emif_post_init_config(OMAP44XX_EMIF2);
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}
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/* for the shadow registers to take effect */
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freq_update_core();
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/* Do some testing after the init */
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if (!in_sdram) {
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size_prog = omap4_sdram_size();
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size_detect = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
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size_prog);
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/* Compare with the size programmed */
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if (size_detect != size_prog) {
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printf("SDRAM: identified size not same as expected"
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" size identified: %x expected: %x\n",
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size_detect,
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size_prog);
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} else
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debug("get_ram_size() successful");
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}
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debug("<<sdram_init()\n");
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}
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131
arch/arm/cpu/armv7/omap4/sdram_elpida.c
Normal file
131
arch/arm/cpu/armv7/omap4/sdram_elpida.c
Normal file
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@ -0,0 +1,131 @@
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/*
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* Timing and Organization details of the Elpida parts used in OMAP4
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* SDPs and Panda
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*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* Aneesh V <aneesh@ti.com>
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*
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* See file CREDITS for list of people who contributed to this
|
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* project.
|
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*
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* 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
|
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
|
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* 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,
|
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* MA 02111-1307 USA
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*/
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#include <asm/arch/emif.h>
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#include <asm/arch/sys_proto.h>
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/*
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* This file provides details of the LPDDR2 SDRAM parts used on OMAP4430
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* SDP and Panda. Since the parts used and geometry are identical for
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* SDP and Panda for a given OMAP4 revision, this information is kept
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* here instead of being in board directory. However the key functions
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* exported are weakly linked so that they can be over-ridden in the board
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* directory if there is a OMAP4 board in the future that uses a different
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* memory device or geometry.
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*
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* For any new board with different memory devices over-ride one or more
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* of the following functions as per the CONFIG flags you intend to enable:
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* - emif_get_reg_dump()
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* - emif_get_dmm_regs()
|
||||
* - emif_get_device_details()
|
||||
* - emif_get_device_timings()
|
||||
*/
|
||||
|
||||
static const struct emif_regs emif_regs_elpida_200_mhz_2cs = {
|
||||
.sdram_config_init = 0x80000eb9,
|
||||
.sdram_config = 0x80001ab9,
|
||||
.ref_ctrl = 0x0000030c,
|
||||
.sdram_tim1 = 0x08648311,
|
||||
.sdram_tim2 = 0x101b06ca,
|
||||
.sdram_tim3 = 0x0048a19f,
|
||||
.read_idle_ctrl = 0x000501ff,
|
||||
.zq_config = 0x500b3214,
|
||||
.temp_alert_config = 0xd8016893,
|
||||
.emif_ddr_phy_ctlr_1_init = 0x049ffff5,
|
||||
.emif_ddr_phy_ctlr_1 = 0x049ff808
|
||||
};
|
||||
|
||||
static const struct emif_regs emif_regs_elpida_380_mhz_1cs = {
|
||||
.sdram_config_init = 0x80000eb1,
|
||||
.sdram_config = 0x80001ab1,
|
||||
.ref_ctrl = 0x000005cd,
|
||||
.sdram_tim1 = 0x10cb0622,
|
||||
.sdram_tim2 = 0x20350d52,
|
||||
.sdram_tim3 = 0x00b1431f,
|
||||
.read_idle_ctrl = 0x000501ff,
|
||||
.zq_config = 0x500b3214,
|
||||
.temp_alert_config = 0x58016893,
|
||||
.emif_ddr_phy_ctlr_1_init = 0x049ffff5,
|
||||
.emif_ddr_phy_ctlr_1 = 0x049ff418
|
||||
};
|
||||
|
||||
const struct emif_regs emif_regs_elpida_400_mhz_2cs = {
|
||||
.sdram_config_init = 0x80000eb9,
|
||||
.sdram_config = 0x80001ab9,
|
||||
.ref_ctrl = 0x00000618,
|
||||
.sdram_tim1 = 0x10eb0662,
|
||||
.sdram_tim2 = 0x20370dd2,
|
||||
.sdram_tim3 = 0x00b1c33f,
|
||||
.read_idle_ctrl = 0x000501ff,
|
||||
.zq_config = 0xd00b3214,
|
||||
.temp_alert_config = 0xd8016893,
|
||||
.emif_ddr_phy_ctlr_1_init = 0x049ffff5,
|
||||
.emif_ddr_phy_ctlr_1 = 0x049ff418
|
||||
};
|
||||
const struct dmm_lisa_map_regs lisa_map_2G_x_1_x_2 = {
|
||||
.dmm_lisa_map_0 = 0xFF020100,
|
||||
.dmm_lisa_map_1 = 0,
|
||||
.dmm_lisa_map_2 = 0,
|
||||
.dmm_lisa_map_3 = 0x80540300
|
||||
};
|
||||
|
||||
const struct dmm_lisa_map_regs lisa_map_2G_x_2_x_2 = {
|
||||
.dmm_lisa_map_0 = 0xFF020100,
|
||||
.dmm_lisa_map_1 = 0,
|
||||
.dmm_lisa_map_2 = 0,
|
||||
.dmm_lisa_map_3 = 0x80640300
|
||||
};
|
||||
|
||||
static void emif_get_reg_dump_sdp(u32 emif_nr, const struct emif_regs **regs)
|
||||
{
|
||||
u32 omap4_rev = omap_revision();
|
||||
|
||||
/* Same devices and geometry on both EMIFs */
|
||||
if (omap4_rev == OMAP4430_ES1_0)
|
||||
*regs = &emif_regs_elpida_380_mhz_1cs;
|
||||
else if (omap4_rev == OMAP4430_ES2_0)
|
||||
*regs = &emif_regs_elpida_200_mhz_2cs;
|
||||
else
|
||||
*regs = &emif_regs_elpida_400_mhz_2cs;
|
||||
}
|
||||
void emif_get_reg_dump(u32 emif_nr, const struct emif_regs **regs)
|
||||
__attribute__((weak, alias("emif_get_reg_dump_sdp")));
|
||||
|
||||
static void emif_get_dmm_regs_sdp(const struct dmm_lisa_map_regs
|
||||
**dmm_lisa_regs)
|
||||
{
|
||||
u32 omap_rev = omap_revision();
|
||||
|
||||
if (omap_rev == OMAP4430_ES1_0)
|
||||
*dmm_lisa_regs = &lisa_map_2G_x_1_x_2;
|
||||
else
|
||||
*dmm_lisa_regs = &lisa_map_2G_x_2_x_2;
|
||||
}
|
||||
|
||||
void emif_get_dmm_regs(const struct dmm_lisa_map_regs **dmm_lisa_regs)
|
||||
__attribute__((weak, alias("emif_get_dmm_regs_sdp")));
|
||||
|
|
@ -33,10 +33,10 @@
|
|||
*/
|
||||
#define LDELAY 1000000
|
||||
|
||||
#define CM_CLKMODE_DPLL_CORE (OMAP44XX_L4_CORE_BASE + 0x4120)
|
||||
#define CM_CLKMODE_DPLL_PER (OMAP44XX_L4_CORE_BASE + 0x8140)
|
||||
#define CM_CLKMODE_DPLL_MPU (OMAP44XX_L4_CORE_BASE + 0x4160)
|
||||
#define CM_CLKSEL_CORE (OMAP44XX_L4_CORE_BASE + 0x4100)
|
||||
#define CM_CLKMODE_DPLL_CORE 0x4A004120
|
||||
#define CM_CLKMODE_DPLL_PER 0x4A008140
|
||||
#define CM_CLKMODE_DPLL_MPU 0x4A004160
|
||||
#define CM_CLKSEL_CORE 0x4A004100
|
||||
|
||||
struct omap4_prcm_regs {
|
||||
/* cm1.ckgen */
|
||||
|
|
|
|||
1025
arch/arm/include/asm/arch-omap4/emif.h
Normal file
1025
arch/arm/include/asm/arch-omap4/emif.h
Normal file
File diff suppressed because it is too large
Load diff
|
|
@ -51,6 +51,11 @@
|
|||
#define CONTROL_PADCONF_CORE (OMAP44XX_L4_CORE_BASE + 0x100000)
|
||||
#define CONTROL_PADCONF_WKUP (OMAP44XX_L4_CORE_BASE + 0x31E000)
|
||||
|
||||
/* LPDDR2 IO regs */
|
||||
#define LPDDR2_IO_REGS_BASE 0x4A100638
|
||||
|
||||
#define CONTROL_EFUSE_2 0x4A100704
|
||||
|
||||
/* CONTROL_ID_CODE */
|
||||
#define CONTROL_ID_CODE 0x4A002204
|
||||
|
||||
|
|
|
|||
|
|
@ -49,6 +49,8 @@ void bypass_dpll(u32 *const base);
|
|||
void freq_update_core(void);
|
||||
u32 get_sys_clk_freq(void);
|
||||
u32 omap4_ddr_clk(void);
|
||||
void sdram_init(void);
|
||||
u32 omap4_sdram_size(void);
|
||||
|
||||
static inline u32 running_from_sdram(void)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in a new issue