2 * TNETV107X: Asynchronous EMIF Configuration
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <asm/arch/clock.h>
25 #include <asm/arch/mux.h>
27 #define ASYNC_EMIF_BASE TNETV107X_ASYNC_EMIF_CNTRL_BASE
28 #define ASYNC_EMIF_CONFIG(cs) (ASYNC_EMIF_BASE+0x10+(cs)*4)
29 #define ASYNC_EMIF_ONENAND_CONTROL (ASYNC_EMIF_BASE+0x5c)
30 #define ASYNC_EMIF_NAND_CONTROL (ASYNC_EMIF_BASE+0x60)
31 #define ASYNC_EMIF_WAITCYCLE_CONFIG (ASYNC_EMIF_BASE+0x4)
33 #define CONFIG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
34 #define CONFIG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
35 #define CONFIG_WR_SETUP(v) (((v) & 0x0f) << 26)
36 #define CONFIG_WR_STROBE(v) (((v) & 0x3f) << 20)
37 #define CONFIG_WR_HOLD(v) (((v) & 0x07) << 17)
38 #define CONFIG_RD_SETUP(v) (((v) & 0x0f) << 13)
39 #define CONFIG_RD_STROBE(v) (((v) & 0x3f) << 7)
40 #define CONFIG_RD_HOLD(v) (((v) & 0x07) << 4)
41 #define CONFIG_TURN_AROUND(v) (((v) & 0x03) << 2)
42 #define CONFIG_WIDTH(v) (((v) & 0x03) << 0)
46 #define set_config_field(reg, field, val) \
49 reg &= ~CONFIG_##field(0xffffffff); \
50 reg |= CONFIG_##field(val); \
54 void configure_async_emif(int cs, struct async_emif_config *cfg)
58 if (cfg->mode == ASYNC_EMIF_MODE_NAND) {
59 tmp = __raw_readl(ASYNC_EMIF_NAND_CONTROL);
61 __raw_writel(tmp, ASYNC_EMIF_NAND_CONTROL);
63 } else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) {
64 tmp = __raw_readl(ASYNC_EMIF_ONENAND_CONTROL);
66 __raw_writel(tmp, ASYNC_EMIF_ONENAND_CONTROL);
69 tmp = __raw_readl(ASYNC_EMIF_CONFIG(cs));
71 set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
72 set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
73 set_config_field(tmp, WR_SETUP, cfg->wr_setup);
74 set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
75 set_config_field(tmp, WR_HOLD, cfg->wr_hold);
76 set_config_field(tmp, RD_SETUP, cfg->rd_setup);
77 set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
78 set_config_field(tmp, RD_HOLD, cfg->rd_hold);
79 set_config_field(tmp, TURN_AROUND, cfg->turn_around);
80 set_config_field(tmp, WIDTH, cfg->width);
82 __raw_writel(tmp, ASYNC_EMIF_CONFIG(cs));
85 void init_async_emif(int num_cs, struct async_emif_config *config)
89 clk_enable(TNETV107X_LPSC_AEMIF);
91 for (cs = 0; cs < num_cs; cs++)
92 configure_async_emif(cs, config + cs);