1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2020 Linumiz
4 * Author: Parthiban Nallathambi <parthiban@linumiz.com>
5 */
6
7 #include <common.h>
8 #include <init.h>
9 #include <spl.h>
10 #include <asm/arch/clock.h>
11 #include <asm/io.h>
12 #include <asm/arch/mx6-ddr.h>
13 #include <asm/arch/mx6-pins.h>
14 #include <asm/arch/crm_regs.h>
15 #include <asm/arch/sys_proto.h>
16 #include <fsl_esdhc_imx.h>
17
18 /* Configuration for Micron MT41K128M16JT-125, 32M x 16 x 8 -> 256MiB */
19
20 static struct mx6ul_iomux_grp_regs mx6_grp_ioregs = {
21 .grp_addds = 0x00000030,
22 .grp_ddrmode_ctl = 0x00020000,
23 .grp_b0ds = 0x00000030,
24 .grp_ctlds = 0x00000030,
25 .grp_b1ds = 0x00000030,
26 .grp_ddrpke = 0x00000000,
27 .grp_ddrmode = 0x00020000,
28 .grp_ddr_type = 0x000c0000,
29 };
30
31 static struct mx6ul_iomux_ddr_regs mx6_ddr_ioregs = {
32 .dram_dqm0 = 0x00000030,
33 .dram_dqm1 = 0x00000030,
34 .dram_ras = 0x00000030,
35 .dram_cas = 0x00000030,
36 .dram_odt0 = 0x00000030,
37 .dram_odt1 = 0x00000030,
38 .dram_sdba2 = 0x00000000,
39 .dram_sdclk_0 = 0x00000030,
40 .dram_sdqs0 = 0x00000030,
41 .dram_sdqs1 = 0x00000030,
42 .dram_reset = 0x00000030,
43 };
44
45 static struct mx6_mmdc_calibration mx6_mmcd_calib = {
46 .p0_mpwldectrl0 = 0x00000000,
47 .p0_mpdgctrl0 = 0x41480148,
48 .p0_mprddlctl = 0x40403E42,
49 .p0_mpwrdlctl = 0x40405852,
50 };
51
52 struct mx6_ddr_sysinfo ddr_sysinfo = {
53 .dsize = 0, /* Bus size = 16bit */
54 .cs_density = 32,
55 .ncs = 1,
56 .cs1_mirror = 0,
57 .rtt_wr = 1,
58 .rtt_nom = 1,
59 .walat = 1, /* Write additional latency */
60 .ralat = 5, /* Read additional latency */
61 .mif3_mode = 3, /* Command prediction working mode */
62 .bi_on = 1, /* Bank interleaving enabled */
63 .pd_fast_exit = 1,
64 .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
65 .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
66 .ddr_type = DDR_TYPE_DDR3,
67 .refsel = 1, /* Refresh cycles at 32KHz */
68 .refr = 7, /* 8 refresh commands per refresh cycle */
69 };
70
71 /* MT41K128M16JT-125 (2Gb density) */
72 static struct mx6_ddr3_cfg mem_ddr = {
73 .mem_speed = 1600,
74 .density = 2,
75 .width = 16,
76 .banks = 8,
77 .rowaddr = 14,
78 .coladdr = 10,
79 .pagesz = 2,
80 .trcd = 1375,
81 .trcmin = 4875,
82 .trasmin = 3500,
83 };
84
ccgr_init(void)85 static void ccgr_init(void)
86 {
87 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
88
89 writel(0xFFFFFFFF, &ccm->CCGR0);
90 writel(0xFFFFFFFF, &ccm->CCGR1);
91 writel(0xFFFFFFFF, &ccm->CCGR2);
92 writel(0xFFFFFFFF, &ccm->CCGR3);
93 writel(0xFFFFFFFF, &ccm->CCGR4);
94 writel(0xFFFFFFFF, &ccm->CCGR5);
95 writel(0xFFFFFFFF, &ccm->CCGR6);
96 }
97
spl_dram_init(void)98 static void spl_dram_init(void)
99 {
100 mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
101 mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
102 }
103
104 #ifdef CONFIG_FSL_ESDHC_IMX
105
106 #define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
107 PAD_CTL_PUS_22K_UP | PAD_CTL_SPEED_LOW | \
108 PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | \
109 PAD_CTL_HYS)
110
111 static iomux_v3_cfg_t const usdhc1_pads[] = {
112 MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
113 MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
114 MX6_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
115 MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
116 MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
117 MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
118 MX6_PAD_UART1_RTS_B__USDHC1_CD_B | MUX_PAD_CTRL(USDHC_PAD_CTRL),
119 };
120
121 #ifndef CONFIG_NAND_MXS
122 static iomux_v3_cfg_t const usdhc2_pads[] = {
123 MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
124 MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
125 MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
126 MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
127 MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
128 MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
129 MX6_PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
130 MX6_PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
131 MX6_PAD_NAND_DATA06__USDHC2_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
132 MX6_PAD_NAND_DATA07__USDHC2_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
133 };
134 #endif
135
136 static struct fsl_esdhc_cfg usdhc_cfg[] = {
137 {
138 .esdhc_base = USDHC1_BASE_ADDR,
139 .max_bus_width = 4,
140 },
141 #ifndef CONFIG_NAND_MXS
142 {
143 .esdhc_base = USDHC2_BASE_ADDR,
144 .max_bus_width = 8,
145 },
146 #endif
147 };
148
board_mmc_getcd(struct mmc * mmc)149 int board_mmc_getcd(struct mmc *mmc)
150 {
151 return 1;
152 }
153
board_mmc_init(struct bd_info * bis)154 int board_mmc_init(struct bd_info *bis)
155 {
156 int i, ret;
157
158 for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
159 switch (i) {
160 case 0:
161 SETUP_IOMUX_PADS(usdhc1_pads);
162 usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
163 break;
164 #ifndef CONFIG_NAND_MXS
165 case 1:
166 SETUP_IOMUX_PADS(usdhc2_pads);
167 usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
168 break;
169 #endif
170 default:
171 printf("Warning - USDHC%d controller not supporting\n",
172 i + 1);
173 return 0;
174 }
175
176 ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
177 if (ret) {
178 printf("Warning: failed to initialize mmc dev %d\n", i);
179 return ret;
180 }
181 }
182
183 return 0;
184 }
185
186 #endif /* CONFIG_FSL_ESDHC_IMX */
187
board_init_f(ulong dummy)188 void board_init_f(ulong dummy)
189 {
190 ccgr_init();
191
192 /* Setup AIPS and disable watchdog */
193 arch_cpu_init();
194
195 /* Setup iomux and fec */
196 board_early_init_f();
197
198 /* Setup GP timer */
199 timer_init();
200
201 /* UART clocks enabled and gd valid - init serial console */
202 preloader_console_init();
203
204 /* DDR initialization */
205 spl_dram_init();
206 }
207