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authorBoris BREZILLON <boris.brezillon@free-electrons.com>2014-07-11 03:49:42 -0400
committerBrian Norris <computersforpeace@gmail.com>2014-07-21 22:39:55 -0400
commit974647ea8a13021a91d558df61d598bcabf73439 (patch)
tree048aa97d3cd850a79c047eb63b34d9abf3551cbf
parentbb5fd0b6daaf0da0b1e78c699b8582984373d3f4 (diff)
mtd: nand: add ONFI timing mode to nand_timings converter
Add a converter to retrieve NAND timings from an ONFI NAND timing mode. At the moment, only SDR NAND timings are supported. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat
-rw-r--r--drivers/mtd/nand/Makefile2
-rw-r--r--drivers/mtd/nand/nand_timings.c253
-rw-r--r--include/linux/mtd/nand.h3
3 files changed, 257 insertions, 1 deletions
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 542b5689eb63..a035e7cc6d46 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -50,4 +50,4 @@ obj-$(CONFIG_MTD_NAND_GPMI_NAND) += gpmi-nand/
50obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o 50obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o
51obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/ 51obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/
52 52
53nand-objs := nand_base.o nand_bbt.o 53nand-objs := nand_base.o nand_bbt.o nand_timings.o
diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c
new file mode 100644
index 000000000000..8b36253420fa
--- /dev/null
+++ b/drivers/mtd/nand/nand_timings.c
@@ -0,0 +1,253 @@
1/*
2 * Copyright (C) 2014 Free Electrons
3 *
4 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#include <linux/kernel.h>
12#include <linux/err.h>
13#include <linux/export.h>
14#include <linux/mtd/nand.h>
15
16static const struct nand_sdr_timings onfi_sdr_timings[] = {
17 /* Mode 0 */
18 {
19 .tADL_min = 200000,
20 .tALH_min = 20000,
21 .tALS_min = 50000,
22 .tAR_min = 25000,
23 .tCEA_max = 100000,
24 .tCEH_min = 20000,
25 .tCH_min = 20000,
26 .tCHZ_max = 100000,
27 .tCLH_min = 20000,
28 .tCLR_min = 20000,
29 .tCLS_min = 50000,
30 .tCOH_min = 0,
31 .tCS_min = 70000,
32 .tDH_min = 20000,
33 .tDS_min = 40000,
34 .tFEAT_max = 1000000,
35 .tIR_min = 10000,
36 .tITC_max = 1000000,
37 .tRC_min = 100000,
38 .tREA_max = 40000,
39 .tREH_min = 30000,
40 .tRHOH_min = 0,
41 .tRHW_min = 200000,
42 .tRHZ_max = 200000,
43 .tRLOH_min = 0,
44 .tRP_min = 50000,
45 .tRST_max = 250000000000,
46 .tWB_max = 200000,
47 .tRR_min = 40000,
48 .tWC_min = 100000,
49 .tWH_min = 30000,
50 .tWHR_min = 120000,
51 .tWP_min = 50000,
52 .tWW_min = 100000,
53 },
54 /* Mode 1 */
55 {
56 .tADL_min = 100000,
57 .tALH_min = 10000,
58 .tALS_min = 25000,
59 .tAR_min = 10000,
60 .tCEA_max = 45000,
61 .tCEH_min = 20000,
62 .tCH_min = 10000,
63 .tCHZ_max = 50000,
64 .tCLH_min = 10000,
65 .tCLR_min = 10000,
66 .tCLS_min = 25000,
67 .tCOH_min = 15000,
68 .tCS_min = 35000,
69 .tDH_min = 10000,
70 .tDS_min = 20000,
71 .tFEAT_max = 1000000,
72 .tIR_min = 0,
73 .tITC_max = 1000000,
74 .tRC_min = 50000,
75 .tREA_max = 30000,
76 .tREH_min = 15000,
77 .tRHOH_min = 15000,
78 .tRHW_min = 100000,
79 .tRHZ_max = 100000,
80 .tRLOH_min = 0,
81 .tRP_min = 25000,
82 .tRR_min = 20000,
83 .tRST_max = 500000000,
84 .tWB_max = 100000,
85 .tWC_min = 45000,
86 .tWH_min = 15000,
87 .tWHR_min = 80000,
88 .tWP_min = 25000,
89 .tWW_min = 100000,
90 },
91 /* Mode 2 */
92 {
93 .tADL_min = 100000,
94 .tALH_min = 10000,
95 .tALS_min = 15000,
96 .tAR_min = 10000,
97 .tCEA_max = 30000,
98 .tCEH_min = 20000,
99 .tCH_min = 10000,
100 .tCHZ_max = 50000,
101 .tCLH_min = 10000,
102 .tCLR_min = 10000,
103 .tCLS_min = 15000,
104 .tCOH_min = 15000,
105 .tCS_min = 25000,
106 .tDH_min = 5000,
107 .tDS_min = 15000,
108 .tFEAT_max = 1000000,
109 .tIR_min = 0,
110 .tITC_max = 1000000,
111 .tRC_min = 35000,
112 .tREA_max = 25000,
113 .tREH_min = 15000,
114 .tRHOH_min = 15000,
115 .tRHW_min = 100000,
116 .tRHZ_max = 100000,
117 .tRLOH_min = 0,
118 .tRR_min = 20000,
119 .tRST_max = 500000000,
120 .tWB_max = 100000,
121 .tRP_min = 17000,
122 .tWC_min = 35000,
123 .tWH_min = 15000,
124 .tWHR_min = 80000,
125 .tWP_min = 17000,
126 .tWW_min = 100000,
127 },
128 /* Mode 3 */
129 {
130 .tADL_min = 100000,
131 .tALH_min = 5000,
132 .tALS_min = 10000,
133 .tAR_min = 10000,
134 .tCEA_max = 25000,
135 .tCEH_min = 20000,
136 .tCH_min = 5000,
137 .tCHZ_max = 50000,
138 .tCLH_min = 5000,
139 .tCLR_min = 10000,
140 .tCLS_min = 10000,
141 .tCOH_min = 15000,
142 .tCS_min = 25000,
143 .tDH_min = 5000,
144 .tDS_min = 10000,
145 .tFEAT_max = 1000000,
146 .tIR_min = 0,
147 .tITC_max = 1000000,
148 .tRC_min = 30000,
149 .tREA_max = 20000,
150 .tREH_min = 10000,
151 .tRHOH_min = 15000,
152 .tRHW_min = 100000,
153 .tRHZ_max = 100000,
154 .tRLOH_min = 0,
155 .tRP_min = 15000,
156 .tRR_min = 20000,
157 .tRST_max = 500000000,
158 .tWB_max = 100000,
159 .tWC_min = 30000,
160 .tWH_min = 10000,
161 .tWHR_min = 80000,
162 .tWP_min = 15000,
163 .tWW_min = 100000,
164 },
165 /* Mode 4 */
166 {
167 .tADL_min = 70000,
168 .tALH_min = 5000,
169 .tALS_min = 10000,
170 .tAR_min = 10000,
171 .tCEA_max = 25000,
172 .tCEH_min = 20000,
173 .tCH_min = 5000,
174 .tCHZ_max = 30000,
175 .tCLH_min = 5000,
176 .tCLR_min = 10000,
177 .tCLS_min = 10000,
178 .tCOH_min = 15000,
179 .tCS_min = 20000,
180 .tDH_min = 5000,
181 .tDS_min = 10000,
182 .tFEAT_max = 1000000,
183 .tIR_min = 0,
184 .tITC_max = 1000000,
185 .tRC_min = 25000,
186 .tREA_max = 20000,
187 .tREH_min = 10000,
188 .tRHOH_min = 15000,
189 .tRHW_min = 100000,
190 .tRHZ_max = 100000,
191 .tRLOH_min = 5000,
192 .tRP_min = 12000,
193 .tRR_min = 20000,
194 .tRST_max = 500000000,
195 .tWB_max = 100000,
196 .tWC_min = 25000,
197 .tWH_min = 10000,
198 .tWHR_min = 80000,
199 .tWP_min = 12000,
200 .tWW_min = 100000,
201 },
202 /* Mode 5 */
203 {
204 .tADL_min = 70000,
205 .tALH_min = 5000,
206 .tALS_min = 10000,
207 .tAR_min = 10000,
208 .tCEA_max = 25000,
209 .tCEH_min = 20000,
210 .tCH_min = 5000,
211 .tCHZ_max = 30000,
212 .tCLH_min = 5000,
213 .tCLR_min = 10000,
214 .tCLS_min = 10000,
215 .tCOH_min = 15000,
216 .tCS_min = 15000,
217 .tDH_min = 5000,
218 .tDS_min = 7000,
219 .tFEAT_max = 1000000,
220 .tIR_min = 0,
221 .tITC_max = 1000000,
222 .tRC_min = 20000,
223 .tREA_max = 16000,
224 .tREH_min = 7000,
225 .tRHOH_min = 15000,
226 .tRHW_min = 100000,
227 .tRHZ_max = 100000,
228 .tRLOH_min = 5000,
229 .tRP_min = 10000,
230 .tRR_min = 20000,
231 .tRST_max = 500000000,
232 .tWB_max = 100000,
233 .tWC_min = 20000,
234 .tWH_min = 7000,
235 .tWHR_min = 80000,
236 .tWP_min = 10000,
237 .tWW_min = 100000,
238 },
239};
240
241/**
242 * onfi_async_timing_mode_to_sdr_timings - [NAND Interface] Retrieve NAND
243 * timings according to the given ONFI timing mode
244 * @mode: ONFI timing mode
245 */
246const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode)
247{
248 if (mode < 0 || mode >= ARRAY_SIZE(onfi_sdr_timings))
249 return ERR_PTR(-EINVAL);
250
251 return &onfi_sdr_timings[mode];
252}
253EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings);
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index cdda207c16e1..3083c53e0270 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -997,4 +997,7 @@ struct nand_sdr_timings {
997 u32 tWP_min; 997 u32 tWP_min;
998 u32 tWW_min; 998 u32 tWW_min;
999}; 999};
1000
1001/* get timing characteristics from ONFI timing mode. */
1002const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode);
1000#endif /* __LINUX_MTD_NAND_H */ 1003#endif /* __LINUX_MTD_NAND_H */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-01 17:21:52 -0500