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>
22 #include <linux/mtd/omap_gpmc.h>
24 struct gpmc *gpmc_cfg;
26 #if defined(CONFIG_OMAP34XX)
27 /********************************************************
28 * mem_ok() - test used to see if timings are correct
29 * for a part. Helps in guessing which part
30 * we are currently using.
31 *******************************************************/
35 u32 pattern = 0x12345678;
37 addr = OMAP34XX_SDRC_CS0 + get_sdr_cs_offset(cs);
39 writel(0x0, addr + 0x400); /* clear pos A */
40 writel(pattern, addr); /* pattern to pos B */
41 writel(0x0, addr + 4); /* remove pattern off the bus */
42 val1 = readl(addr + 0x400); /* get pos A value */
43 val2 = readl(addr); /* get val2 */
44 writel(0x0, addr + 0x400); /* clear pos A */
46 if ((val1 != 0) || (val2 != pattern)) /* see if pos A val changed */
53 void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
56 writel(0, &cs->config7);
58 /* Delay for settling */
59 writel(gpmc_config[0], &cs->config1);
60 writel(gpmc_config[1], &cs->config2);
61 writel(gpmc_config[2], &cs->config3);
62 writel(gpmc_config[3], &cs->config4);
63 writel(gpmc_config[4], &cs->config5);
64 writel(gpmc_config[5], &cs->config6);
65 /* Enable the config */
66 writel((((size & 0xF) << 8) | ((base >> 24) & 0x3F) |
67 (1 << 6)), &cs->config7);
71 /*****************************************************
72 * gpmc_init(): init gpmc bus
73 * Init GPMC for x16, MuxMode (SDRAM in x32).
74 * This code can only be executed from SRAM or SDRAM.
75 *****************************************************/
78 /* putting a blanket check on GPMC based on ZeBu for now */
79 gpmc_cfg = (struct gpmc *)GPMC_BASE;
80 #if defined(CONFIG_NOR)
81 /* configure GPMC for NOR */
82 const u32 gpmc_regs[GPMC_MAX_REG] = { STNOR_GPMC_CONFIG1,
90 u32 base = CONFIG_SYS_FLASH_BASE;
91 u32 size = (CONFIG_SYS_FLASH_SIZE > 0x08000000) ? GPMC_SIZE_256M :
92 /* > 64MB */ ((CONFIG_SYS_FLASH_SIZE > 0x04000000) ? GPMC_SIZE_128M :
93 /* > 32MB */ ((CONFIG_SYS_FLASH_SIZE > 0x02000000) ? GPMC_SIZE_64M :
94 /* > 16MB */ ((CONFIG_SYS_FLASH_SIZE > 0x01000000) ? GPMC_SIZE_32M :
95 /* min 16MB */ GPMC_SIZE_16M)));
96 #elif defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
97 /* configure GPMC for NAND */
98 const u32 gpmc_regs[GPMC_MAX_REG] = { M_NAND_GPMC_CONFIG1,
106 u32 base = CONFIG_SYS_NAND_BASE;
107 u32 size = GPMC_SIZE_16M;
109 #elif defined(CONFIG_CMD_ONENAND)
110 const u32 gpmc_regs[GPMC_MAX_REG] = { ONENAND_GPMC_CONFIG1,
111 ONENAND_GPMC_CONFIG2,
112 ONENAND_GPMC_CONFIG3,
113 ONENAND_GPMC_CONFIG4,
114 ONENAND_GPMC_CONFIG5,
115 ONENAND_GPMC_CONFIG6,
118 u32 base = PISMO1_ONEN_BASE;
119 u32 size = PISMO1_ONEN_SIZE;
121 const u32 gpmc_regs[GPMC_MAX_REG] = { 0, 0, 0, 0, 0, 0, 0 };
125 /* global settings */
126 writel(0x00000008, &gpmc_cfg->sysconfig);
127 writel(0x00000000, &gpmc_cfg->irqstatus);
128 writel(0x00000000, &gpmc_cfg->irqenable);
129 /* disable timeout, set a safe reset value */
130 writel(0x00001ff0, &gpmc_cfg->timeout_control);
132 writel(0x00000200, &gpmc_cfg->config);
134 writel(0x00000012, &gpmc_cfg->config);
137 * Disable the GPMC0 config set by ROM code
139 writel(0, &gpmc_cfg->cs[0].config7);
141 /* enable chip-select specific configurations */
143 enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);