2 * (C) Copyright 2009-2013 ADVANSEE
3 * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
5 * Based on the mpc512x iim code:
6 * Copyright 2008 Silicon Turnkey Express, Inc.
7 * Martha Marx <mmarx@silicontkx.com>
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #include <asm/errno.h>
32 #ifndef CONFIG_MPC512X
33 #include <asm/arch/imx-regs.h>
36 /* FSL IIM-specific constants */
37 #define STAT_BUSY 0x80
38 #define STAT_PRGD 0x02
39 #define STAT_SNSD 0x01
41 #define STATM_PRGD_M 0x02
42 #define STATM_SNSD_M 0x01
50 #define ERR_PARITYE 0x02
52 #define EMASK_PRGE_M 0x80
53 #define EMASK_WPE_M 0x40
54 #define EMASK_OPE_M 0x20
55 #define EMASK_RPE_M 0x10
56 #define EMASK_WLRE_M 0x08
57 #define EMASK_SNSE_M 0x04
58 #define EMASK_PARITYE_M 0x02
61 #define FCTL_PRG_LENGTH_MASK 0x70
62 #define FCTL_ESNS_N 0x08
63 #define FCTL_ESNS_0 0x04
64 #define FCTL_ESNS_1 0x02
67 #define UA_A_BANK_MASK 0x38
68 #define UA_A_ROWH_MASK 0x07
70 #define LA_A_ROWL_MASK 0xf8
71 #define LA_A_BIT_MASK 0x07
73 #define PREV_PROD_REV_MASK 0xf8
74 #define PREV_PROD_VT_MASK 0x07
76 /* Select the correct accessors depending on endianness */
77 #if __BYTE_ORDER == __LITTLE_ENDIAN
78 #define iim_read32 in_le32
79 #define iim_write32 out_le32
80 #define iim_clrsetbits32 clrsetbits_le32
81 #define iim_clrbits32 clrbits_le32
82 #define iim_setbits32 setbits_le32
83 #elif __BYTE_ORDER == __BIG_ENDIAN
84 #define iim_read32 in_be32
85 #define iim_write32 out_be32
86 #define iim_clrsetbits32 clrsetbits_be32
87 #define iim_clrbits32 clrbits_be32
88 #define iim_setbits32 setbits_be32
90 #error Endianess is not defined: please fix to continue
93 /* IIM control registers */
112 static int prepare_access(struct fsl_iim **regs, u32 bank, u32 word, int assert,
115 *regs = (struct fsl_iim *)IIM_BASE_ADDR;
117 if (bank >= ARRAY_SIZE((*regs)->bank) ||
118 word >= ARRAY_SIZE((*regs)->bank[0].word) ||
120 printf("fsl_iim %s(): Invalid argument\n", caller);
127 static void clear_status(struct fsl_iim *regs)
129 iim_setbits32(®s->stat, 0);
130 iim_setbits32(®s->err, 0);
133 static void finish_access(struct fsl_iim *regs, u32 *stat, u32 *err)
135 *stat = iim_read32(®s->stat);
136 *err = iim_read32(®s->err);
140 static int prepare_read(struct fsl_iim **regs, u32 bank, u32 word, u32 *val,
145 ret = prepare_access(regs, bank, word, val != NULL, caller);
154 int fuse_read(u32 bank, u32 word, u32 *val)
156 struct fsl_iim *regs;
160 ret = prepare_read(®s, bank, word, val, __func__);
164 *val = iim_read32(®s->bank[bank].word[word]);
165 finish_access(regs, &stat, &err);
168 puts("fsl_iim fuse_read(): Read protect error\n");
175 static void direct_access(struct fsl_iim *regs, u32 bank, u32 word, u32 bit,
176 u32 fctl, u32 *stat, u32 *err)
178 iim_write32(®s->ua, bank << 3 | word >> 5);
179 iim_write32(®s->la, (word << 3 | bit) & 0xff);
180 if (fctl == FCTL_PRG)
181 iim_write32(®s->prg_p, 0xaa);
182 iim_setbits32(®s->fctl, fctl);
183 while (iim_read32(®s->stat) & STAT_BUSY)
185 finish_access(regs, stat, err);
188 int fuse_sense(u32 bank, u32 word, u32 *val)
190 struct fsl_iim *regs;
194 ret = prepare_read(®s, bank, word, val, __func__);
198 direct_access(regs, bank, word, 0, FCTL_ESNS_N, &stat, &err);
200 if (err & ERR_SNSE) {
201 puts("fsl_iim fuse_sense(): Explicit sense cycle error\n");
205 if (!(stat & STAT_SNSD)) {
206 puts("fsl_iim fuse_sense(): Explicit sense cycle did not complete\n");
210 *val = iim_read32(®s->sdat);
214 static int prog_bit(struct fsl_iim *regs, u32 bank, u32 word, u32 bit)
219 direct_access(regs, bank, word, bit, FCTL_PRG, &stat, &err);
220 iim_write32(®s->prg_p, 0x00);
222 if (err & ERR_PRGE) {
223 puts("fsl_iim fuse_prog(): Program error\n");
228 puts("fsl_iim fuse_prog(): Write protect error\n");
232 if (!(stat & STAT_PRGD)) {
233 puts("fsl_iim fuse_prog(): Program did not complete\n");
240 static int prepare_write(struct fsl_iim **regs, u32 bank, u32 word, u32 val,
243 return prepare_access(regs, bank, word, !(val & ~0xff), caller);
246 int fuse_prog(u32 bank, u32 word, u32 val)
248 struct fsl_iim *regs;
252 ret = prepare_write(®s, bank, word, val, __func__);
256 for (bit = 0; val; bit++, val >>= 1)
258 ret = prog_bit(regs, bank, word, bit);
266 int fuse_override(u32 bank, u32 word, u32 val)
268 struct fsl_iim *regs;
272 ret = prepare_write(®s, bank, word, val, __func__);
277 iim_write32(®s->bank[bank].word[word], val);
278 finish_access(regs, &stat, &err);
281 puts("fsl_iim fuse_override(): Override protect error\n");