3 * Texas Instruments, <www.ti.com>
6 * Mansoor Ahamed <mansoor.ahamed@ti.com>
9 * Manikandan Pillai <mani.pillai@ti.com>
10 * Richard Woodruff <r-woodruff2@ti.com>
11 * Syed Mohammed Khasim <khasim@ti.com>
13 * SPDX-License-Identifier: GPL-2.0+
18 #include <asm/arch/cpu.h>
19 #include <asm/arch/mem.h>
20 #include <asm/arch/sys_proto.h>
23 struct gpmc *gpmc_cfg;
26 void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
29 writel(0, &cs->config7);
31 /* Delay for settling */
32 writel(gpmc_config[0], &cs->config1);
33 writel(gpmc_config[1], &cs->config2);
34 writel(gpmc_config[2], &cs->config3);
35 writel(gpmc_config[3], &cs->config4);
36 writel(gpmc_config[4], &cs->config5);
37 writel(gpmc_config[5], &cs->config6);
38 /* Enable the config */
39 writel((((size & 0xF) << 8) | ((base >> 24) & 0x3F) |
40 (1 << 6)), &cs->config7);
44 /*****************************************************
45 * gpmc_init(): init gpmc bus
46 * Init GPMC for x16, MuxMode (SDRAM in x32).
47 * This code can only be executed from SRAM or SDRAM.
48 *****************************************************/
51 /* putting a blanket check on GPMC based on ZeBu for now */
52 gpmc_cfg = (struct gpmc *)GPMC_BASE;
53 #if defined(CONFIG_NOR)
54 /* configure GPMC for NOR */
55 const u32 gpmc_regs[GPMC_MAX_REG] = { STNOR_GPMC_CONFIG1,
63 u32 size = GPMC_SIZE_16M;
64 u32 base = CONFIG_SYS_FLASH_BASE;
65 #elif defined(CONFIG_NAND)
66 /* configure GPMC for NAND */
67 const u32 gpmc_regs[GPMC_MAX_REG] = { M_NAND_GPMC_CONFIG1,
75 u32 size = GPMC_SIZE_256M;
76 u32 base = CONFIG_SYS_NAND_BASE;
78 const u32 gpmc_regs[GPMC_MAX_REG] = { 0, 0, 0, 0, 0, 0, 0 };
83 writel(0x00000008, &gpmc_cfg->sysconfig);
84 writel(0x00000000, &gpmc_cfg->irqstatus);
85 writel(0x00000000, &gpmc_cfg->irqenable);
87 writel(0x00000200, &gpmc_cfg->config);
89 writel(0x00000012, &gpmc_cfg->config);
92 * Disable the GPMC0 config set by ROM code
94 writel(0, &gpmc_cfg->cs[0].config7);
96 /* enable chip-select specific configurations */
97 enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);