| Vitaly Andrianov | 7bcf4d6 | 2014-04-04 13:16:53 -0400 | [diff] [blame^] | 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/io.h> |
| 12 | #include <asm/arch/clock.h> |
| 13 | #include <asm/arch/emif_defs.h> |
| 14 | |
| 15 | #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0) |
| 16 | #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0) |
| 17 | #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26) |
| 18 | #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20) |
| 19 | #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17) |
| 20 | #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13) |
| 21 | #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7) |
| 22 | #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4) |
| 23 | #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2) |
| 24 | #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0) |
| 25 | |
| 26 | #define set_config_field(reg, field, val) \ |
| 27 | do { \ |
| 28 | if (val != -1) { \ |
| 29 | reg &= ~AEMIF_CFG_##field(0xffffffff); \ |
| 30 | reg |= AEMIF_CFG_##field(val); \ |
| 31 | } \ |
| 32 | } while (0) |
| 33 | |
| 34 | void configure_async_emif(int cs, struct async_emif_config *cfg) |
| 35 | { |
| 36 | unsigned long tmp; |
| 37 | |
| 38 | if (cfg->mode == ASYNC_EMIF_MODE_NAND) { |
| 39 | tmp = __raw_readl(&davinci_emif_regs->nandfcr); |
| 40 | tmp |= (1 << cs); |
| 41 | __raw_writel(tmp, &davinci_emif_regs->nandfcr); |
| 42 | |
| 43 | } else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) { |
| 44 | tmp = __raw_readl(&davinci_emif_regs->one_nand_cr); |
| 45 | tmp |= (1 << cs); |
| 46 | __raw_writel(tmp, &davinci_emif_regs->one_nand_cr); |
| 47 | } |
| 48 | |
| 49 | tmp = __raw_readl(&davinci_emif_regs->abncr[cs]); |
| 50 | |
| 51 | set_config_field(tmp, SELECT_STROBE, cfg->select_strobe); |
| 52 | set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait); |
| 53 | set_config_field(tmp, WR_SETUP, cfg->wr_setup); |
| 54 | set_config_field(tmp, WR_STROBE, cfg->wr_strobe); |
| 55 | set_config_field(tmp, WR_HOLD, cfg->wr_hold); |
| 56 | set_config_field(tmp, RD_SETUP, cfg->rd_setup); |
| 57 | set_config_field(tmp, RD_STROBE, cfg->rd_strobe); |
| 58 | set_config_field(tmp, RD_HOLD, cfg->rd_hold); |
| 59 | set_config_field(tmp, TURN_AROUND, cfg->turn_around); |
| 60 | set_config_field(tmp, WIDTH, cfg->width); |
| 61 | |
| 62 | __raw_writel(tmp, &davinci_emif_regs->abncr[cs]); |
| 63 | } |
| 64 | |
| 65 | void init_async_emif(int num_cs, struct async_emif_config *config) |
| 66 | { |
| 67 | int cs; |
| 68 | |
| 69 | for (cs = 0; cs < num_cs; cs++) |
| 70 | configure_async_emif(cs, config + cs); |
| 71 | } |