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 For details about these magic
80 * values please see the EMIF registers section of the TRM.
82 void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
84 writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl);
85 writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw);
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);
98 * for most SOCs these registers won't need to be changed so only
99 * write to these registers if someone explicitly has set the
102 if(regs->emif_cos_config) {
103 writel(regs->emif_prio_class_serv_map, &emif_reg[nr]->emif_prio_class_serv_map);
104 writel(regs->emif_connect_id_serv_1_map, &emif_reg[nr]->emif_connect_id_serv_1_map);
105 writel(regs->emif_connect_id_serv_2_map, &emif_reg[nr]->emif_connect_id_serv_2_map);
106 writel(regs->emif_cos_config, &emif_reg[nr]->emif_cos_config);
110 * Sequence to ensure that the PHY is in a known state prior to
111 * startting hardware leveling. Also acts as to latch some state from
112 * the EMIF into the PHY.
114 writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
115 writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
116 writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
118 clrbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
119 EMIF_REG_INITREF_DIS_MASK);
121 writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
122 writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
123 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
124 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
126 /* Perform hardware leveling. */
128 writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36) |
129 0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
130 writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw) |
131 0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);
133 writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);
135 /* Enable read leveling */
136 writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_ctl);
139 * Enable full read and write leveling. Wait for read and write
140 * leveling bit to clear RDWRLVLFULL_START bit 31
142 while((readl(&emif_reg[nr]->emif_rd_wr_lvl_ctl) & 0x80000000) != 0)
145 /* Check the timeout register to see if leveling is complete */
146 if((readl(&emif_reg[nr]->emif_status) & 0x70) != 0)
147 puts("DDR3 H/W leveling incomplete with errors\n");
149 if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) {
158 void config_sdram(const struct emif_regs *regs, int nr)
160 if (regs->zq_config) {
161 writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
162 writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
163 writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
164 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
165 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
167 writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
168 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
169 writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
175 void set_sdram_timings(const struct emif_regs *regs, int nr)
177 writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1);
178 writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1_shdw);
179 writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2);
180 writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2_shdw);
181 writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3);
182 writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw);
186 * Configure EXT PHY registers for hardware leveling
188 static void ext_phy_settings(const struct emif_regs *regs, int nr)
191 * Enable hardware leveling on the EMIF. For details about these
192 * magic values please see the EMIF registers section of the TRM.
194 writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1);
195 writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw);
196 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22);
197 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22_shdw);
198 writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23);
199 writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23_shdw);
200 writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24);
201 writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24_shdw);
202 writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25);
203 writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25_shdw);
204 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26);
205 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26_shdw);
206 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27);
207 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27_shdw);
208 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28);
209 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28_shdw);
210 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29);
211 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29_shdw);
212 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30);
213 writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30_shdw);
214 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31);
215 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31_shdw);
216 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32);
217 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32_shdw);
218 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33);
219 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33_shdw);
220 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34);
221 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34_shdw);
222 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35);
223 writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35_shdw);
224 writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
225 writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);
228 * Sequence to ensure that the PHY is again in a known state after
231 writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
232 writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
233 writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
239 void config_ddr_phy(const struct emif_regs *regs, int nr)
242 * Disable initialization and refreshes for now until we
243 * finish programming EMIF regs.
244 * Also set time between rising edge of DDR_RESET to rising
245 * edge of DDR_CKE to > 500us per memory spec.
247 #ifndef CONFIG_AM43XX
248 setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
249 EMIF_REG_INITREF_DIS_MASK);
252 writel(0x80003100, &emif_reg[nr]->emif_sdram_ref_ctrl);
254 writel(regs->emif_ddr_phy_ctlr_1,
255 &emif_reg[nr]->emif_ddr_phy_ctrl_1);
256 writel(regs->emif_ddr_phy_ctlr_1,
257 &emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw);
259 if (get_emif_rev((u32)emif_reg[nr]) == EMIF_4D5)
260 ext_phy_settings(regs, nr);
264 * Configure DDR CMD control registers
266 void config_cmd_ctrl(const struct cmd_control *cmd, int nr)
271 writel(cmd->cmd0csratio, &ddr_cmd_reg[nr]->cm0csratio);
272 writel(cmd->cmd0iclkout, &ddr_cmd_reg[nr]->cm0iclkout);
274 writel(cmd->cmd1csratio, &ddr_cmd_reg[nr]->cm1csratio);
275 writel(cmd->cmd1iclkout, &ddr_cmd_reg[nr]->cm1iclkout);
277 writel(cmd->cmd2csratio, &ddr_cmd_reg[nr]->cm2csratio);
278 writel(cmd->cmd2iclkout, &ddr_cmd_reg[nr]->cm2iclkout);
282 * Configure DDR DATA registers
284 void config_ddr_data(const struct ddr_data *data, int nr)
291 for (i = 0; i < DDR_DATA_REGS_NR; i++) {
292 writel(data->datardsratio0,
293 &(ddr_data_reg[nr]+i)->dt0rdsratio0);
294 writel(data->datawdsratio0,
295 &(ddr_data_reg[nr]+i)->dt0wdsratio0);
296 writel(data->datawiratio0,
297 &(ddr_data_reg[nr]+i)->dt0wiratio0);
298 writel(data->datagiratio0,
299 &(ddr_data_reg[nr]+i)->dt0giratio0);
300 writel(data->datafwsratio0,
301 &(ddr_data_reg[nr]+i)->dt0fwsratio0);
302 writel(data->datawrsratio0,
303 &(ddr_data_reg[nr]+i)->dt0wrsratio0);
307 void config_io_ctrl(const struct ctrl_ioregs *ioregs)
312 writel(ioregs->cm0ioctl, &ioctrl_reg->cm0ioctl);
313 writel(ioregs->cm1ioctl, &ioctrl_reg->cm1ioctl);
314 writel(ioregs->cm2ioctl, &ioctrl_reg->cm2ioctl);
315 writel(ioregs->dt0ioctl, &ioctrl_reg->dt0ioctl);
316 writel(ioregs->dt1ioctl, &ioctrl_reg->dt1ioctl);
318 writel(ioregs->dt2ioctrl, &ioctrl_reg->dt2ioctrl);
319 writel(ioregs->dt3ioctrl, &ioctrl_reg->dt3ioctrl);
320 writel(ioregs->emif_sdram_config_ext,
321 &ioctrl_reg->emif_sdram_config_ext);