1 /* 2 * Keystone2: Asynchronous EMIF Configuration 3 * 4 * (C) Copyright 2012-2014 5 * Texas Instruments Incorporated, <www.ti.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <asm/ti-common/ti-aemif.h> 12 13 #define AEMIF_WAITCYCLE_CONFIG (CONFIG_AEMIF_CNTRL_BASE + 0x4) 14 #define AEMIF_NAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x60) 15 #define AEMIF_ONENAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x5c) 16 #define AEMIF_CONFIG(cs) (CONFIG_AEMIF_CNTRL_BASE + 0x10 \ 17 + (cs * 4)) 18 19 #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0) 20 #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0) 21 #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26) 22 #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20) 23 #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17) 24 #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13) 25 #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7) 26 #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4) 27 #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2) 28 #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0) 29 30 #define set_config_field(reg, field, val) \ 31 do { \ 32 if (val != -1) { \ 33 reg &= ~AEMIF_CFG_##field(0xffffffff); \ 34 reg |= AEMIF_CFG_##field(val); \ 35 } \ 36 } while (0) 37 38 static void aemif_configure(int cs, struct aemif_config *cfg) 39 { 40 unsigned long tmp; 41 42 if (cfg->mode == AEMIF_MODE_NAND) { 43 tmp = __raw_readl(AEMIF_NAND_CONTROL); 44 tmp |= (1 << cs); 45 __raw_writel(tmp, AEMIF_NAND_CONTROL); 46 47 } else if (cfg->mode == AEMIF_MODE_ONENAND) { 48 tmp = __raw_readl(AEMIF_ONENAND_CONTROL); 49 tmp |= (1 << cs); 50 __raw_writel(tmp, AEMIF_ONENAND_CONTROL); 51 } 52 53 tmp = __raw_readl(AEMIF_CONFIG(cs)); 54 55 set_config_field(tmp, SELECT_STROBE, cfg->select_strobe); 56 set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait); 57 set_config_field(tmp, WR_SETUP, cfg->wr_setup); 58 set_config_field(tmp, WR_STROBE, cfg->wr_strobe); 59 set_config_field(tmp, WR_HOLD, cfg->wr_hold); 60 set_config_field(tmp, RD_SETUP, cfg->rd_setup); 61 set_config_field(tmp, RD_STROBE, cfg->rd_strobe); 62 set_config_field(tmp, RD_HOLD, cfg->rd_hold); 63 set_config_field(tmp, TURN_AROUND, cfg->turn_around); 64 set_config_field(tmp, WIDTH, cfg->width); 65 66 __raw_writel(tmp, AEMIF_CONFIG(cs)); 67 } 68 69 void aemif_init(int num_cs, struct aemif_config *config) 70 { 71 int cs; 72 73 if (num_cs > AEMIF_NUM_CS) { 74 num_cs = AEMIF_NUM_CS; 75 printf("AEMIF: csnum has to be <= 5"); 76 } 77 78 for (cs = 0; cs < num_cs; cs++) 79 aemif_configure(cs, config + cs); 80 } 81