tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * arch/blackfin/include/asm/mem_init.h - reprogram clocks / memory
3 *
4 * Copyright 2004-2008 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#if defined(EBIU_SDGCTL)
10#if defined(CONFIG_MEM_MT48LC16M16A2TG_75) || \
11 defined(CONFIG_MEM_MT48LC64M4A2FB_7E) || \
12 defined(CONFIG_MEM_MT48LC16M8A2TG_75) || \
13 defined(CONFIG_MEM_MT48LC32M8A2_75) || \
14 defined(CONFIG_MEM_MT48LC8M32B2B5_7) || \
15 defined(CONFIG_MEM_MT48LC32M16A2TG_75) || \
16 defined(CONFIG_MEM_MT48LC32M8A2_75)
17#if (CONFIG_SCLK_HZ > 119402985)
18#define SDRAM_tRP TRP_2
19#define SDRAM_tRP_num 2
20#define SDRAM_tRAS TRAS_7
21#define SDRAM_tRAS_num 7
22#define SDRAM_tRCD TRCD_2
23#define SDRAM_tWR TWR_2
24#endif
25#if (CONFIG_SCLK_HZ > 104477612) && (CONFIG_SCLK_HZ <= 119402985)
26#define SDRAM_tRP TRP_2
27#define SDRAM_tRP_num 2
28#define SDRAM_tRAS TRAS_6
29#define SDRAM_tRAS_num 6
30#define SDRAM_tRCD TRCD_2
31#define SDRAM_tWR TWR_2
32#endif
33#if (CONFIG_SCLK_HZ > 89552239) && (CONFIG_SCLK_HZ <= 104477612)
34#define SDRAM_tRP TRP_2
35#define SDRAM_tRP_num 2
36#define SDRAM_tRAS TRAS_5
37#define SDRAM_tRAS_num 5
38#define SDRAM_tRCD TRCD_2
39#define SDRAM_tWR TWR_2
40#endif
41#if (CONFIG_SCLK_HZ > 74626866) && (CONFIG_SCLK_HZ <= 89552239)
42#define SDRAM_tRP TRP_2
43#define SDRAM_tRP_num 2
44#define SDRAM_tRAS TRAS_4
45#define SDRAM_tRAS_num 4
46#define SDRAM_tRCD TRCD_2
47#define SDRAM_tWR TWR_2
48#endif
49#if (CONFIG_SCLK_HZ > 66666667) && (CONFIG_SCLK_HZ <= 74626866)
50#define SDRAM_tRP TRP_2
51#define SDRAM_tRP_num 2
52#define SDRAM_tRAS TRAS_3
53#define SDRAM_tRAS_num 3
54#define SDRAM_tRCD TRCD_2
55#define SDRAM_tWR TWR_2
56#endif
57#if (CONFIG_SCLK_HZ > 59701493) && (CONFIG_SCLK_HZ <= 66666667)
58#define SDRAM_tRP TRP_1
59#define SDRAM_tRP_num 1
60#define SDRAM_tRAS TRAS_4
61#define SDRAM_tRAS_num 4
62#define SDRAM_tRCD TRCD_1
63#define SDRAM_tWR TWR_2
64#endif
65#if (CONFIG_SCLK_HZ > 44776119) && (CONFIG_SCLK_HZ <= 59701493)
66#define SDRAM_tRP TRP_1
67#define SDRAM_tRP_num 1
68#define SDRAM_tRAS TRAS_3
69#define SDRAM_tRAS_num 3
70#define SDRAM_tRCD TRCD_1
71#define SDRAM_tWR TWR_2
72#endif
73#if (CONFIG_SCLK_HZ > 29850746) && (CONFIG_SCLK_HZ <= 44776119)
74#define SDRAM_tRP TRP_1
75#define SDRAM_tRP_num 1
76#define SDRAM_tRAS TRAS_2
77#define SDRAM_tRAS_num 2
78#define SDRAM_tRCD TRCD_1
79#define SDRAM_tWR TWR_2
80#endif
81#if (CONFIG_SCLK_HZ <= 29850746)
82#define SDRAM_tRP TRP_1
83#define SDRAM_tRP_num 1
84#define SDRAM_tRAS TRAS_1
85#define SDRAM_tRAS_num 1
86#define SDRAM_tRCD TRCD_1
87#define SDRAM_tWR TWR_2
88#endif
89#endif
90
91/*
92 * The BF526-EZ-Board changed SDRAM chips between revisions,
93 * so we use below timings to accommodate both.
94 */
95#if defined(CONFIG_MEM_MT48H32M16LFCJ_75)
96#if (CONFIG_SCLK_HZ > 119402985)
97#define SDRAM_tRP TRP_2
98#define SDRAM_tRP_num 2
99#define SDRAM_tRAS TRAS_8
100#define SDRAM_tRAS_num 8
101#define SDRAM_tRCD TRCD_2
102#define SDRAM_tWR TWR_2
103#endif
104#if (CONFIG_SCLK_HZ > 104477612) && (CONFIG_SCLK_HZ <= 119402985)
105#define SDRAM_tRP TRP_2
106#define SDRAM_tRP_num 2
107#define SDRAM_tRAS TRAS_7
108#define SDRAM_tRAS_num 7
109#define SDRAM_tRCD TRCD_2
110#define SDRAM_tWR TWR_2
111#endif
112#if (CONFIG_SCLK_HZ > 89552239) && (CONFIG_SCLK_HZ <= 104477612)
113#define SDRAM_tRP TRP_2
114#define SDRAM_tRP_num 2
115#define SDRAM_tRAS TRAS_6
116#define SDRAM_tRAS_num 6
117#define SDRAM_tRCD TRCD_2
118#define SDRAM_tWR TWR_2
119#endif
120#if (CONFIG_SCLK_HZ > 74626866) && (CONFIG_SCLK_HZ <= 89552239)
121#define SDRAM_tRP TRP_2
122#define SDRAM_tRP_num 2
123#define SDRAM_tRAS TRAS_5
124#define SDRAM_tRAS_num 5
125#define SDRAM_tRCD TRCD_2
126#define SDRAM_tWR TWR_2
127#endif
128#if (CONFIG_SCLK_HZ > 66666667) && (CONFIG_SCLK_HZ <= 74626866)
129#define SDRAM_tRP TRP_2
130#define SDRAM_tRP_num 2
131#define SDRAM_tRAS TRAS_4
132#define SDRAM_tRAS_num 4
133#define SDRAM_tRCD TRCD_2
134#define SDRAM_tWR TWR_2
135#endif
136#if (CONFIG_SCLK_HZ > 59701493) && (CONFIG_SCLK_HZ <= 66666667)
137#define SDRAM_tRP TRP_2
138#define SDRAM_tRP_num 2
139#define SDRAM_tRAS TRAS_4
140#define SDRAM_tRAS_num 4
141#define SDRAM_tRCD TRCD_1
142#define SDRAM_tWR TWR_2
143#endif
144#if (CONFIG_SCLK_HZ > 44776119) && (CONFIG_SCLK_HZ <= 59701493)
145#define SDRAM_tRP TRP_2
146#define SDRAM_tRP_num 2
147#define SDRAM_tRAS TRAS_3
148#define SDRAM_tRAS_num 3
149#define SDRAM_tRCD TRCD_1
150#define SDRAM_tWR TWR_2
151#endif
152#if (CONFIG_SCLK_HZ > 29850746) && (CONFIG_SCLK_HZ <= 44776119)
153#define SDRAM_tRP TRP_1
154#define SDRAM_tRP_num 1
155#define SDRAM_tRAS TRAS_3
156#define SDRAM_tRAS_num 3
157#define SDRAM_tRCD TRCD_1
158#define SDRAM_tWR TWR_2
159#endif
160#if (CONFIG_SCLK_HZ <= 29850746)
161#define SDRAM_tRP TRP_1
162#define SDRAM_tRP_num 1
163#define SDRAM_tRAS TRAS_2
164#define SDRAM_tRAS_num 2
165#define SDRAM_tRCD TRCD_1
166#define SDRAM_tWR TWR_2
167#endif
168#endif
169
170#if defined(CONFIG_MEM_MT48LC16M8A2TG_75) || \
171 defined(CONFIG_MEM_MT48LC8M32B2B5_7)
172 /*SDRAM INFORMATION: */
173#define SDRAM_Tref 64 /* Refresh period in milliseconds */
174#define SDRAM_NRA 4096 /* Number of row addresses in SDRAM */
175#define SDRAM_CL CL_3
176#endif
177
178#if defined(CONFIG_MEM_MT48LC32M8A2_75) || \
179 defined(CONFIG_MEM_MT48LC64M4A2FB_7E) || \
180 defined(CONFIG_MEM_MT48LC32M16A2TG_75) || \
181 defined(CONFIG_MEM_MT48LC16M16A2TG_75) || \
182 defined(CONFIG_MEM_MT48LC32M8A2_75)
183 /*SDRAM INFORMATION: */
184#define SDRAM_Tref 64 /* Refresh period in milliseconds */
185#define SDRAM_NRA 8192 /* Number of row addresses in SDRAM */
186#define SDRAM_CL CL_3
187#endif
188
189#if defined(CONFIG_MEM_MT48H32M16LFCJ_75)
190 /*SDRAM INFORMATION: */
191#define SDRAM_Tref 64 /* Refresh period in milliseconds */
192#define SDRAM_NRA 8192 /* Number of row addresses in SDRAM */
193#define SDRAM_CL CL_2
194#endif
195
196
197#ifdef CONFIG_BFIN_KERNEL_CLOCK_MEMINIT_CALC
198/* Equation from section 17 (p17-46) of BF533 HRM */
199#define mem_SDRRC (((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) - (SDRAM_tRAS_num + SDRAM_tRP_num)
200
201/* Enable SCLK Out */
202#define mem_SDGCTL (SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR | PSS)
203#else
204#define mem_SDRRC CONFIG_MEM_SDRRC
205#define mem_SDGCTL CONFIG_MEM_SDGCTL
206#endif
207#endif
208
209
210#if defined(EBIU_DDRCTL0)
211#define MIN_DDR_SCLK(x) (x*(CONFIG_SCLK_HZ/1000/1000)/1000 + 1)
212#define MAX_DDR_SCLK(x) (x*(CONFIG_SCLK_HZ/1000/1000)/1000)
213#define DDR_CLK_HZ(x) (1000*1000*1000/x)
214
215#if defined(CONFIG_MEM_MT46V32M16_6T)
216#define DDR_SIZE DEVSZ_512
217#define DDR_WIDTH DEVWD_16
218#define DDR_MAX_tCK 13
219
220#define DDR_tRC DDR_TRC(MIN_DDR_SCLK(60))
221#define DDR_tRAS DDR_TRAS(MIN_DDR_SCLK(42))
222#define DDR_tRP DDR_TRP(MIN_DDR_SCLK(15))
223#define DDR_tRFC DDR_TRFC(MIN_DDR_SCLK(72))
224#define DDR_tREFI DDR_TREFI(MAX_DDR_SCLK(7800))
225
226#define DDR_tRCD DDR_TRCD(MIN_DDR_SCLK(15))
227#define DDR_tWTR DDR_TWTR(1)
228#define DDR_tMRD DDR_TMRD(MIN_DDR_SCLK(12))
229#define DDR_tWR DDR_TWR(MIN_DDR_SCLK(15))
230#endif
231
232#if defined(CONFIG_MEM_MT46V32M16_5B)
233#define DDR_SIZE DEVSZ_512
234#define DDR_WIDTH DEVWD_16
235#define DDR_MAX_tCK 13
236
237#define DDR_tRC DDR_TRC(MIN_DDR_SCLK(55))
238#define DDR_tRAS DDR_TRAS(MIN_DDR_SCLK(40))
239#define DDR_tRP DDR_TRP(MIN_DDR_SCLK(15))
240#define DDR_tRFC DDR_TRFC(MIN_DDR_SCLK(70))
241#define DDR_tREFI DDR_TREFI(MAX_DDR_SCLK(7800))
242
243#define DDR_tRCD DDR_TRCD(MIN_DDR_SCLK(15))
244#define DDR_tWTR DDR_TWTR(2)
245#define DDR_tMRD DDR_TMRD(MIN_DDR_SCLK(10))
246#define DDR_tWR DDR_TWR(MIN_DDR_SCLK(15))
247#endif
248
249#if (CONFIG_SCLK_HZ < DDR_CLK_HZ(DDR_MAX_tCK))
250# error "CONFIG_SCLK_HZ is too small (<DDR_CLK_HZ(DDR_MAX_tCK) Hz)."
251#elif(CONFIG_SCLK_HZ <= 133333333)
252# define DDR_CL CL_2
253#else
254# error "CONFIG_SCLK_HZ is too large (>133333333 Hz)."
255#endif
256
257#ifdef CONFIG_BFIN_KERNEL_CLOCK_MEMINIT_CALC
258#define mem_DDRCTL0 (DDR_tRP | DDR_tRAS | DDR_tRC | DDR_tRFC | DDR_tREFI)
259#define mem_DDRCTL1 (DDR_DATWIDTH | EXTBANK_1 | DDR_SIZE | DDR_WIDTH | DDR_tWTR \
260 | DDR_tMRD | DDR_tWR | DDR_tRCD)
261#define mem_DDRCTL2 DDR_CL
262#else
263#define mem_DDRCTL0 CONFIG_MEM_DDRCTL0
264#define mem_DDRCTL1 CONFIG_MEM_DDRCTL1
265#define mem_DDRCTL2 CONFIG_MEM_DDRCTL2
266#endif
267#endif
268
269#if defined CONFIG_CLKIN_HALF
270#define CLKIN_HALF 1
271#else
272#define CLKIN_HALF 0
273#endif
274
275#if defined CONFIG_PLL_BYPASS
276#define PLL_BYPASS 1
277#else
278#define PLL_BYPASS 0
279#endif