2 * DDR Configuration for AM33xx devices.
4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
6 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/arch/cpu.h>
10 #include <asm/arch/ddr_defs.h>
11 #include <asm/arch/sys_proto.h>
16 * Base address for EMIF instances
18 static struct emif_reg_struct *emif_reg[2] = {
19 (struct emif_reg_struct *)EMIF4_0_CFG_BASE,
20 (struct emif_reg_struct *)EMIF4_1_CFG_BASE};
23 * Base addresses for DDR PHY cmd/data regs
25 static struct ddr_cmd_regs *ddr_cmd_reg[2] = {
26 (struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR,
27 (struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR2};
29 static struct ddr_data_regs *ddr_data_reg[2] = {
30 (struct ddr_data_regs *)DDR_PHY_DATA_ADDR,
31 (struct ddr_data_regs *)DDR_PHY_DATA_ADDR2};
34 * Base address for ddr io control instances
36 static struct ddr_cmdtctrl *ioctrl_reg = {
37 (struct ddr_cmdtctrl *)DDR_CONTROL_BASE_ADDR};
39 static inline u32 get_mr(int nr, u32 cs, u32 mr_addr)
43 mr_addr |= cs << EMIF_REG_CS_SHIFT;
44 writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);
46 mr = readl(&emif_reg[nr]->emif_lpddr2_mode_reg_data);
47 debug("get_mr: EMIF1 cs %d mr %08x val 0x%x\n", cs, mr_addr, mr);
48 if (((mr & 0x0000ff00) >> 8) == (mr & 0xff) &&
49 ((mr & 0x00ff0000) >> 16) == (mr & 0xff) &&
50 ((mr & 0xff000000) >> 24) == (mr & 0xff))
56 static inline void set_mr(int nr, u32 cs, u32 mr_addr, u32 mr_val)
58 mr_addr |= cs << EMIF_REG_CS_SHIFT;
59 writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);
60 writel(mr_val, &emif_reg[nr]->emif_lpddr2_mode_reg_data);
63 static void configure_mr(int nr, u32 cs)
67 while (get_mr(nr, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
69 set_mr(nr, cs, LPDDR2_MR10, 0x56);
71 set_mr(nr, cs, LPDDR2_MR1, 0x43);
72 set_mr(nr, cs, LPDDR2_MR2, 0x2);
74 mr_addr = LPDDR2_MR2 | EMIF_REG_REFRESH_EN_MASK;
75 set_mr(nr, cs, mr_addr, 0x2);
79 * Configure EMIF4D5 registers and MR registers
81 void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
83 writel(0x0, &emif_reg[nr]->emif_pwr_mgmt_ctrl);
84 writel(0x0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw);
85 writel(0x1, &emif_reg[nr]->emif_iodft_tlgc);
86 writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
88 writel(regs->temp_alert_config, &emif_reg[nr]->emif_temp_alert_config);
89 writel(regs->emif_rd_wr_lvl_rmp_win,
90 &emif_reg[nr]->emif_rd_wr_lvl_rmp_win);
91 writel(regs->emif_rd_wr_lvl_rmp_ctl,
92 &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);
93 writel(regs->emif_rd_wr_lvl_ctl, &emif_reg[nr]->emif_rd_wr_lvl_ctl);
94 writel(regs->emif_rd_wr_exec_thresh,
95 &emif_reg[nr]->emif_rd_wr_exec_thresh);
97 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
98 writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
100 if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) {
109 void config_sdram(const struct emif_regs *regs, int nr)
111 if (regs->zq_config) {
113 * A value of 0x2800 for the REF CTRL will give us
114 * about 570us for a delay, which will be long enough
115 * to configure things.
117 writel(0x2800, &emif_reg[nr]->emif_sdram_ref_ctrl);
118 writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
119 writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
120 writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
121 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
122 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
124 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
125 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
126 writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
132 void set_sdram_timings(const struct emif_regs *regs, int nr)
134 writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1);
135 writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1_shdw);
136 writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2);
137 writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2_shdw);
138 writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3);
139 writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw);
142 void __weak emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size)
147 * Configure EXT PHY registers
149 static void ext_phy_settings(const struct emif_regs *regs, int nr)
151 u32 *ext_phy_ctrl_base = 0;
152 u32 *emif_ext_phy_ctrl_base = 0;
153 const u32 *ext_phy_ctrl_const_regs;
157 ext_phy_ctrl_base = (u32 *)&(regs->emif_ddr_ext_phy_ctrl_1);
158 emif_ext_phy_ctrl_base =
159 (u32 *)&(emif_reg[nr]->emif_ddr_ext_phy_ctrl_1);
161 /* Configure external phy control timing registers */
162 for (i = 0; i < EMIF_EXT_PHY_CTRL_TIMING_REG; i++) {
163 writel(*ext_phy_ctrl_base, emif_ext_phy_ctrl_base++);
164 /* Update shadow registers */
165 writel(*ext_phy_ctrl_base++, emif_ext_phy_ctrl_base++);
169 * external phy 6-24 registers do not change with
172 emif_get_ext_phy_ctrl_const_regs(&ext_phy_ctrl_const_regs, &size);
177 for (i = 0; i < size; i++) {
178 writel(ext_phy_ctrl_const_regs[i], emif_ext_phy_ctrl_base++);
179 /* Update shadow registers */
180 writel(ext_phy_ctrl_const_regs[i], emif_ext_phy_ctrl_base++);
187 void config_ddr_phy(const struct emif_regs *regs, int nr)
190 * disable initialization and refreshes for now until we
191 * finish programming EMIF regs.
193 setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
194 EMIF_REG_INITREF_DIS_MASK);
196 writel(regs->emif_ddr_phy_ctlr_1,
197 &emif_reg[nr]->emif_ddr_phy_ctrl_1);
198 writel(regs->emif_ddr_phy_ctlr_1,
199 &emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw);
201 if (get_emif_rev((u32)emif_reg[nr]) == EMIF_4D5)
202 ext_phy_settings(regs, nr);
206 * Configure DDR CMD control registers
208 void config_cmd_ctrl(const struct cmd_control *cmd, int nr)
213 writel(cmd->cmd0csratio, &ddr_cmd_reg[nr]->cm0csratio);
214 writel(cmd->cmd0iclkout, &ddr_cmd_reg[nr]->cm0iclkout);
216 writel(cmd->cmd1csratio, &ddr_cmd_reg[nr]->cm1csratio);
217 writel(cmd->cmd1iclkout, &ddr_cmd_reg[nr]->cm1iclkout);
219 writel(cmd->cmd2csratio, &ddr_cmd_reg[nr]->cm2csratio);
220 writel(cmd->cmd2iclkout, &ddr_cmd_reg[nr]->cm2iclkout);
224 * Configure DDR DATA registers
226 void config_ddr_data(const struct ddr_data *data, int nr)
233 for (i = 0; i < DDR_DATA_REGS_NR; i++) {
234 writel(data->datardsratio0,
235 &(ddr_data_reg[nr]+i)->dt0rdsratio0);
236 writel(data->datawdsratio0,
237 &(ddr_data_reg[nr]+i)->dt0wdsratio0);
238 writel(data->datawiratio0,
239 &(ddr_data_reg[nr]+i)->dt0wiratio0);
240 writel(data->datagiratio0,
241 &(ddr_data_reg[nr]+i)->dt0giratio0);
242 writel(data->datafwsratio0,
243 &(ddr_data_reg[nr]+i)->dt0fwsratio0);
244 writel(data->datawrsratio0,
245 &(ddr_data_reg[nr]+i)->dt0wrsratio0);
249 void config_io_ctrl(const struct ctrl_ioregs *ioregs)
254 writel(ioregs->cm0ioctl, &ioctrl_reg->cm0ioctl);
255 writel(ioregs->cm1ioctl, &ioctrl_reg->cm1ioctl);
256 writel(ioregs->cm2ioctl, &ioctrl_reg->cm2ioctl);
257 writel(ioregs->dt0ioctl, &ioctrl_reg->dt0ioctl);
258 writel(ioregs->dt1ioctl, &ioctrl_reg->dt1ioctl);
260 writel(ioregs->dt2ioctrl, &ioctrl_reg->dt2ioctrl);
261 writel(ioregs->dt3ioctrl, &ioctrl_reg->dt3ioctrl);
262 writel(ioregs->emif_sdram_config_ext,
263 &ioctrl_reg->emif_sdram_config_ext);