LXR uboot/drivers/memory/ti-aemif.c

   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
  38static 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
  69void 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