1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * emif4.c
4 *
5 * AM33XX emif4 configuration file
6 *
7 * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
8 */
9
10 #include <common.h>
11 #include <asm/arch/cpu.h>
12 #include <asm/arch/ddr_defs.h>
13 #include <asm/arch/hardware.h>
14 #include <asm/arch/clock.h>
15 #include <asm/arch/sys_proto.h>
16 #include <asm/io.h>
17 #include <asm/emif.h>
18
19 static struct vtp_reg *vtpreg[2] = {
20 (struct vtp_reg *)VTP0_CTRL_ADDR,
21 (struct vtp_reg *)VTP1_CTRL_ADDR};
22 #ifdef CONFIG_AM33XX
23 static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
24 #endif
25 #ifdef CONFIG_AM43XX
26 static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
27 static struct cm_device_inst *cm_device =
28 (struct cm_device_inst *)CM_DEVICE_INST;
29 #endif
30
31 #ifdef CONFIG_TI814X
config_dmm(const struct dmm_lisa_map_regs * regs)32 void config_dmm(const struct dmm_lisa_map_regs *regs)
33 {
34 struct dmm_lisa_map_regs *hw_lisa_map_regs =
35 (struct dmm_lisa_map_regs *)DMM_BASE;
36
37 enable_dmm_clocks();
38
39 writel(0, &hw_lisa_map_regs->dmm_lisa_map_3);
40 writel(0, &hw_lisa_map_regs->dmm_lisa_map_2);
41 writel(0, &hw_lisa_map_regs->dmm_lisa_map_1);
42 writel(0, &hw_lisa_map_regs->dmm_lisa_map_0);
43
44 writel(regs->dmm_lisa_map_3, &hw_lisa_map_regs->dmm_lisa_map_3);
45 writel(regs->dmm_lisa_map_2, &hw_lisa_map_regs->dmm_lisa_map_2);
46 writel(regs->dmm_lisa_map_1, &hw_lisa_map_regs->dmm_lisa_map_1);
47 writel(regs->dmm_lisa_map_0, &hw_lisa_map_regs->dmm_lisa_map_0);
48 }
49 #endif
50
config_vtp(int nr)51 static void config_vtp(int nr)
52 {
53 writel(readl(&vtpreg[nr]->vtp0ctrlreg) | VTP_CTRL_ENABLE,
54 &vtpreg[nr]->vtp0ctrlreg);
55 writel(readl(&vtpreg[nr]->vtp0ctrlreg) & (~VTP_CTRL_START_EN),
56 &vtpreg[nr]->vtp0ctrlreg);
57 writel(readl(&vtpreg[nr]->vtp0ctrlreg) | VTP_CTRL_START_EN,
58 &vtpreg[nr]->vtp0ctrlreg);
59
60 /* Poll for READY */
61 while ((readl(&vtpreg[nr]->vtp0ctrlreg) & VTP_CTRL_READY) !=
62 VTP_CTRL_READY)
63 ;
64 }
65
ddr_pll_config(unsigned int ddrpll_m)66 void __weak ddr_pll_config(unsigned int ddrpll_m)
67 {
68 }
69
config_ddr(unsigned int pll,const struct ctrl_ioregs * ioregs,const struct ddr_data * data,const struct cmd_control * ctrl,const struct emif_regs * regs,int nr)70 void config_ddr(unsigned int pll, const struct ctrl_ioregs *ioregs,
71 const struct ddr_data *data, const struct cmd_control *ctrl,
72 const struct emif_regs *regs, int nr)
73 {
74 ddr_pll_config(pll);
75 config_vtp(nr);
76 config_cmd_ctrl(ctrl, nr);
77
78 config_ddr_data(data, nr);
79 #ifdef CONFIG_AM33XX
80 config_io_ctrl(ioregs);
81
82 /* Set CKE to be controlled by EMIF/DDR PHY */
83 writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl);
84
85 #endif
86 #ifdef CONFIG_AM43XX
87 writel(readl(&cm_device->cm_dll_ctrl) & ~0x1, &cm_device->cm_dll_ctrl);
88 while ((readl(&cm_device->cm_dll_ctrl) & CM_DLL_READYST) == 0)
89 ;
90
91 config_io_ctrl(ioregs);
92
93 /* Set CKE to be controlled by EMIF/DDR PHY */
94 writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl);
95
96 if (emif_sdram_type(regs->sdram_config) == EMIF_SDRAM_TYPE_DDR3)
97 #ifndef CONFIG_SPL_RTC_DDR_SUPPORT
98 /* Allow EMIF to control DDR_RESET */
99 writel(0x00000000, &ddrctrl->ddrioctrl);
100 #else
101 /* Override EMIF DDR_RESET control */
102 writel(0x80000000, &ddrctrl->ddrioctrl);
103 #endif /* CONFIG_SPL_RTC_DDR_SUPPORT */
104 #endif
105
106 /* Program EMIF instance */
107 config_ddr_phy(regs, nr);
108 set_sdram_timings(regs, nr);
109 if (get_emif_rev(EMIF1_BASE) == EMIF_4D5)
110 config_sdram_emif4d5(regs, nr);
111 else
112 config_sdram(regs, nr);
113 }
114