1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Keystone2: Asynchronous EMIF Configuration 4 * 5 * (C) Copyright 2012-2014 6 * Texas Instruments Incorporated, <www.ti.com> 7 */ 8 9 #include <common.h> 10 #include <asm/ti-common/ti-aemif.h> 11 12 #define AEMIF_WAITCYCLE_CONFIG (CONFIG_AEMIF_CNTRL_BASE + 0x4) 13 #define AEMIF_NAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x60) 14 #define AEMIF_ONENAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x5c) 15 #define AEMIF_CONFIG(cs) (CONFIG_AEMIF_CNTRL_BASE + 0x10 \ 16 + (cs * 4)) 17 18 #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0) 19 #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0) 20 #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26) 21 #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20) 22 #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17) 23 #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13) 24 #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7) 25 #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4) 26 #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2) 27 #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0) 28 29 #define set_config_field(reg, field, val) \ 30 do { \ 31 if (val != -1) { \ 32 reg &= ~AEMIF_CFG_##field(0xffffffff); \ 33 reg |= AEMIF_CFG_##field(val); \ 34 } \ 35 } while (0) 36 37 static void aemif_configure(int cs, struct aemif_config *cfg) 38 { 39 unsigned long tmp; 40 41 if (cfg->mode == AEMIF_MODE_NAND) { 42 tmp = __raw_readl(AEMIF_NAND_CONTROL); 43 tmp |= (1 << cs); 44 __raw_writel(tmp, AEMIF_NAND_CONTROL); 45 46 } else if (cfg->mode == AEMIF_MODE_ONENAND) { 47 tmp = __raw_readl(AEMIF_ONENAND_CONTROL); 48 tmp |= (1 << cs); 49 __raw_writel(tmp, AEMIF_ONENAND_CONTROL); 50 } 51 52 tmp = __raw_readl(AEMIF_CONFIG(cs)); 53 54 set_config_field(tmp, SELECT_STROBE, cfg->select_strobe); 55 set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait); 56 set_config_field(tmp, WR_SETUP, cfg->wr_setup); 57 set_config_field(tmp, WR_STROBE, cfg->wr_strobe); 58 set_config_field(tmp, WR_HOLD, cfg->wr_hold); 59 set_config_field(tmp, RD_SETUP, cfg->rd_setup); 60 set_config_field(tmp, RD_STROBE, cfg->rd_strobe); 61 set_config_field(tmp, RD_HOLD, cfg->rd_hold); 62 set_config_field(tmp, TURN_AROUND, cfg->turn_around); 63 set_config_field(tmp, WIDTH, cfg->width); 64 65 __raw_writel(tmp, AEMIF_CONFIG(cs)); 66 } 67 68 void aemif_init(int num_cs, struct aemif_config *config) 69 { 70 int cs; 71 72 if (num_cs > AEMIF_NUM_CS) { 73 num_cs = AEMIF_NUM_CS; 74 printf("AEMIF: csnum has to be <= 5"); 75 } 76 77 for (cs = 0; cs < num_cs; cs++) 78 aemif_configure(cs, config + cs); 79 } 80
