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1 | /* |
2 | * Copyright (C) 2014 Gateworks Corporation | |
3 | * Author: Tim Harvey <tharvey@gateworks.com> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <linux/types.h> | |
10 | #include <asm/arch/mx6-ddr.h> | |
11 | #include <asm/arch/sys_proto.h> | |
12 | #include <asm/io.h> | |
13 | #include <asm/types.h> | |
14 | ||
15 | #if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D) | |
16 | /* Configure MX6DQ mmdc iomux */ | |
17 | void mx6dq_dram_iocfg(unsigned width, | |
18 | const struct mx6dq_iomux_ddr_regs *ddr, | |
19 | const struct mx6dq_iomux_grp_regs *grp) | |
20 | { | |
21 | volatile struct mx6dq_iomux_ddr_regs *mx6_ddr_iomux; | |
22 | volatile struct mx6dq_iomux_grp_regs *mx6_grp_iomux; | |
23 | ||
24 | mx6_ddr_iomux = (struct mx6dq_iomux_ddr_regs *)MX6DQ_IOM_DDR_BASE; | |
25 | mx6_grp_iomux = (struct mx6dq_iomux_grp_regs *)MX6DQ_IOM_GRP_BASE; | |
26 | ||
27 | /* DDR IO Type */ | |
28 | mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type; | |
29 | mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke; | |
30 | ||
31 | /* Clock */ | |
32 | mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0; | |
33 | mx6_ddr_iomux->dram_sdclk_1 = ddr->dram_sdclk_1; | |
34 | ||
35 | /* Address */ | |
36 | mx6_ddr_iomux->dram_cas = ddr->dram_cas; | |
37 | mx6_ddr_iomux->dram_ras = ddr->dram_ras; | |
38 | mx6_grp_iomux->grp_addds = grp->grp_addds; | |
39 | ||
40 | /* Control */ | |
41 | mx6_ddr_iomux->dram_reset = ddr->dram_reset; | |
42 | mx6_ddr_iomux->dram_sdcke0 = ddr->dram_sdcke0; | |
43 | mx6_ddr_iomux->dram_sdcke1 = ddr->dram_sdcke1; | |
44 | mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2; | |
45 | mx6_ddr_iomux->dram_sdodt0 = ddr->dram_sdodt0; | |
46 | mx6_ddr_iomux->dram_sdodt1 = ddr->dram_sdodt1; | |
47 | mx6_grp_iomux->grp_ctlds = grp->grp_ctlds; | |
48 | ||
49 | /* Data Strobes */ | |
50 | mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl; | |
51 | mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0; | |
52 | mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1; | |
53 | if (width >= 32) { | |
54 | mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2; | |
55 | mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3; | |
56 | } | |
57 | if (width >= 64) { | |
58 | mx6_ddr_iomux->dram_sdqs4 = ddr->dram_sdqs4; | |
59 | mx6_ddr_iomux->dram_sdqs5 = ddr->dram_sdqs5; | |
60 | mx6_ddr_iomux->dram_sdqs6 = ddr->dram_sdqs6; | |
61 | mx6_ddr_iomux->dram_sdqs7 = ddr->dram_sdqs7; | |
62 | } | |
63 | ||
64 | /* Data */ | |
65 | mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode; | |
66 | mx6_grp_iomux->grp_b0ds = grp->grp_b0ds; | |
67 | mx6_grp_iomux->grp_b1ds = grp->grp_b1ds; | |
68 | if (width >= 32) { | |
69 | mx6_grp_iomux->grp_b2ds = grp->grp_b2ds; | |
70 | mx6_grp_iomux->grp_b3ds = grp->grp_b3ds; | |
71 | } | |
72 | if (width >= 64) { | |
73 | mx6_grp_iomux->grp_b4ds = grp->grp_b4ds; | |
74 | mx6_grp_iomux->grp_b5ds = grp->grp_b5ds; | |
75 | mx6_grp_iomux->grp_b6ds = grp->grp_b6ds; | |
76 | mx6_grp_iomux->grp_b7ds = grp->grp_b7ds; | |
77 | } | |
78 | mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0; | |
79 | mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1; | |
80 | if (width >= 32) { | |
81 | mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2; | |
82 | mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3; | |
83 | } | |
84 | if (width >= 64) { | |
85 | mx6_ddr_iomux->dram_dqm4 = ddr->dram_dqm4; | |
86 | mx6_ddr_iomux->dram_dqm5 = ddr->dram_dqm5; | |
87 | mx6_ddr_iomux->dram_dqm6 = ddr->dram_dqm6; | |
88 | mx6_ddr_iomux->dram_dqm7 = ddr->dram_dqm7; | |
89 | } | |
90 | } | |
91 | #endif | |
92 | ||
93 | #if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6DL) || defined(CONFIG_MX6S) | |
94 | /* Configure MX6SDL mmdc iomux */ | |
95 | void mx6sdl_dram_iocfg(unsigned width, | |
96 | const struct mx6sdl_iomux_ddr_regs *ddr, | |
97 | const struct mx6sdl_iomux_grp_regs *grp) | |
98 | { | |
99 | volatile struct mx6sdl_iomux_ddr_regs *mx6_ddr_iomux; | |
100 | volatile struct mx6sdl_iomux_grp_regs *mx6_grp_iomux; | |
101 | ||
102 | mx6_ddr_iomux = (struct mx6sdl_iomux_ddr_regs *)MX6SDL_IOM_DDR_BASE; | |
103 | mx6_grp_iomux = (struct mx6sdl_iomux_grp_regs *)MX6SDL_IOM_GRP_BASE; | |
104 | ||
105 | /* DDR IO Type */ | |
106 | mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type; | |
107 | mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke; | |
108 | ||
109 | /* Clock */ | |
110 | mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0; | |
111 | mx6_ddr_iomux->dram_sdclk_1 = ddr->dram_sdclk_1; | |
112 | ||
113 | /* Address */ | |
114 | mx6_ddr_iomux->dram_cas = ddr->dram_cas; | |
115 | mx6_ddr_iomux->dram_ras = ddr->dram_ras; | |
116 | mx6_grp_iomux->grp_addds = grp->grp_addds; | |
117 | ||
118 | /* Control */ | |
119 | mx6_ddr_iomux->dram_reset = ddr->dram_reset; | |
120 | mx6_ddr_iomux->dram_sdcke0 = ddr->dram_sdcke0; | |
121 | mx6_ddr_iomux->dram_sdcke1 = ddr->dram_sdcke1; | |
122 | mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2; | |
123 | mx6_ddr_iomux->dram_sdodt0 = ddr->dram_sdodt0; | |
124 | mx6_ddr_iomux->dram_sdodt1 = ddr->dram_sdodt1; | |
125 | mx6_grp_iomux->grp_ctlds = grp->grp_ctlds; | |
126 | ||
127 | /* Data Strobes */ | |
128 | mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl; | |
129 | mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0; | |
130 | mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1; | |
131 | if (width >= 32) { | |
132 | mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2; | |
133 | mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3; | |
134 | } | |
135 | if (width >= 64) { | |
136 | mx6_ddr_iomux->dram_sdqs4 = ddr->dram_sdqs4; | |
137 | mx6_ddr_iomux->dram_sdqs5 = ddr->dram_sdqs5; | |
138 | mx6_ddr_iomux->dram_sdqs6 = ddr->dram_sdqs6; | |
139 | mx6_ddr_iomux->dram_sdqs7 = ddr->dram_sdqs7; | |
140 | } | |
141 | ||
142 | /* Data */ | |
143 | mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode; | |
144 | mx6_grp_iomux->grp_b0ds = grp->grp_b0ds; | |
145 | mx6_grp_iomux->grp_b1ds = grp->grp_b1ds; | |
146 | if (width >= 32) { | |
147 | mx6_grp_iomux->grp_b2ds = grp->grp_b2ds; | |
148 | mx6_grp_iomux->grp_b3ds = grp->grp_b3ds; | |
149 | } | |
150 | if (width >= 64) { | |
151 | mx6_grp_iomux->grp_b4ds = grp->grp_b4ds; | |
152 | mx6_grp_iomux->grp_b5ds = grp->grp_b5ds; | |
153 | mx6_grp_iomux->grp_b6ds = grp->grp_b6ds; | |
154 | mx6_grp_iomux->grp_b7ds = grp->grp_b7ds; | |
155 | } | |
156 | mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0; | |
157 | mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1; | |
158 | if (width >= 32) { | |
159 | mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2; | |
160 | mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3; | |
161 | } | |
162 | if (width >= 64) { | |
163 | mx6_ddr_iomux->dram_dqm4 = ddr->dram_dqm4; | |
164 | mx6_ddr_iomux->dram_dqm5 = ddr->dram_dqm5; | |
165 | mx6_ddr_iomux->dram_dqm6 = ddr->dram_dqm6; | |
166 | mx6_ddr_iomux->dram_dqm7 = ddr->dram_dqm7; | |
167 | } | |
168 | } | |
169 | #endif | |
170 | ||
171 | /* | |
172 | * Configure mx6 mmdc registers based on: | |
173 | * - board-specific memory configuration | |
174 | * - board-specific calibration data | |
175 | * - ddr3 chip details | |
176 | * | |
177 | * The various calculations here are derived from the Freescale | |
178 | * i.Mx6DQSDL DDR3 Script Aid spreadsheet (DOC-94917) designed to generate MMDC | |
179 | * configuration registers based on memory system and memory chip parameters. | |
180 | * | |
181 | * The defaults here are those which were specified in the spreadsheet. | |
182 | * For details on each register, refer to the IMX6DQRM and/or IMX6SDLRM | |
183 | * section titled MMDC initialization | |
184 | */ | |
185 | #define MR(val, ba, cmd, cs1) \ | |
186 | ((val << 16) | (1 << 15) | (cmd << 4) | (cs1 << 3) | ba) | |
187 | void mx6_dram_cfg(const struct mx6_ddr_sysinfo *i, | |
188 | const struct mx6_mmdc_calibration *c, | |
189 | const struct mx6_ddr3_cfg *m) | |
190 | { | |
191 | volatile struct mmdc_p_regs *mmdc0; | |
192 | volatile struct mmdc_p_regs *mmdc1; | |
193 | u32 reg; | |
194 | u8 tcke, tcksrx, tcksre, txpdll, taofpd, taonpd, trrd; | |
195 | u8 todtlon, taxpd, tanpd, tcwl, txp, tfaw, tcl; | |
196 | u8 todt_idle_off = 0x4; /* from DDR3 Script Aid spreadsheet */ | |
197 | u16 trcd, trc, tras, twr, tmrd, trtp, trp, twtr, trfc, txs, txpr; | |
198 | u16 CS0_END; | |
199 | u16 tdllk = 0x1ff; /* DLL locking time: 512 cycles (JEDEC DDR3) */ | |
200 | int clkper; /* clock period in picoseconds */ | |
201 | int clock; /* clock freq in mHz */ | |
202 | int cs; | |
203 | ||
204 | mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR; | |
205 | mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR; | |
206 | ||
207 | /* MX6D/MX6Q: 1066 MHz memory clock, clkper = 1.894ns = 1894ps */ | |
208 | if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) { | |
209 | clock = 528; | |
210 | tcwl = 4; | |
211 | } | |
212 | /* MX6S/MX6DL: 800 MHz memory clock, clkper = 2.5ns = 2500ps */ | |
213 | else { | |
214 | clock = 400; | |
215 | tcwl = 3; | |
216 | } | |
217 | clkper = (1000*1000)/clock; /* ps */ | |
218 | todtlon = tcwl; | |
219 | taxpd = tcwl; | |
220 | tanpd = tcwl; | |
221 | tcwl = tcwl; | |
222 | ||
223 | switch (m->density) { | |
224 | case 1: /* 1Gb per chip */ | |
225 | trfc = DIV_ROUND_UP(110000, clkper) - 1; | |
226 | txs = DIV_ROUND_UP(120000, clkper) - 1; | |
227 | break; | |
228 | case 2: /* 2Gb per chip */ | |
229 | trfc = DIV_ROUND_UP(160000, clkper) - 1; | |
230 | txs = DIV_ROUND_UP(170000, clkper) - 1; | |
231 | break; | |
232 | case 4: /* 4Gb per chip */ | |
233 | trfc = DIV_ROUND_UP(260000, clkper) - 1; | |
234 | txs = DIV_ROUND_UP(270000, clkper) - 1; | |
235 | break; | |
236 | case 8: /* 8Gb per chip */ | |
237 | trfc = DIV_ROUND_UP(350000, clkper) - 1; | |
238 | txs = DIV_ROUND_UP(360000, clkper) - 1; | |
239 | break; | |
240 | default: | |
241 | /* invalid density */ | |
242 | printf("invalid chip density\n"); | |
243 | hang(); | |
244 | break; | |
245 | } | |
246 | txpr = txs; | |
247 | ||
248 | switch (m->mem_speed) { | |
249 | case 800: | |
250 | txp = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1; | |
251 | tcke = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1; | |
252 | if (m->pagesz == 1) { | |
253 | tfaw = DIV_ROUND_UP(40000, clkper) - 1; | |
254 | trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1; | |
255 | } else { | |
256 | tfaw = DIV_ROUND_UP(50000, clkper) - 1; | |
257 | trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1; | |
258 | } | |
259 | break; | |
260 | case 1066: | |
261 | txp = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1; | |
262 | tcke = DIV_ROUND_UP(MAX(3*clkper, 5625), clkper) - 1; | |
263 | if (m->pagesz == 1) { | |
264 | tfaw = DIV_ROUND_UP(37500, clkper) - 1; | |
265 | trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1; | |
266 | } else { | |
267 | tfaw = DIV_ROUND_UP(50000, clkper) - 1; | |
268 | trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1; | |
269 | } | |
270 | break; | |
271 | case 1333: | |
272 | txp = DIV_ROUND_UP(MAX(3*clkper, 6000), clkper) - 1; | |
273 | tcke = DIV_ROUND_UP(MAX(3*clkper, 5625), clkper) - 1; | |
274 | if (m->pagesz == 1) { | |
275 | tfaw = DIV_ROUND_UP(30000, clkper) - 1; | |
276 | trrd = DIV_ROUND_UP(MAX(4*clkper, 6000), clkper) - 1; | |
277 | } else { | |
278 | tfaw = DIV_ROUND_UP(45000, clkper) - 1; | |
279 | trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1; | |
280 | } | |
281 | break; | |
282 | case 1600: | |
283 | txp = DIV_ROUND_UP(MAX(3*clkper, 6000), clkper) - 1; | |
284 | tcke = DIV_ROUND_UP(MAX(3*clkper, 5000), clkper) - 1; | |
285 | if (m->pagesz == 1) { | |
286 | tfaw = DIV_ROUND_UP(30000, clkper) - 1; | |
287 | trrd = DIV_ROUND_UP(MAX(4*clkper, 6000), clkper) - 1; | |
288 | } else { | |
289 | tfaw = DIV_ROUND_UP(40000, clkper) - 1; | |
290 | trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1; | |
291 | } | |
292 | break; | |
293 | default: | |
294 | printf("invalid memory speed\n"); | |
295 | hang(); | |
296 | break; | |
297 | } | |
298 | txpdll = DIV_ROUND_UP(MAX(10*clkper, 24000), clkper) - 1; | |
299 | tcl = DIV_ROUND_UP(m->trcd, clkper/10) - 3; | |
300 | tcksre = DIV_ROUND_UP(MAX(5*clkper, 10000), clkper); | |
301 | tcksrx = tcksre; | |
302 | taonpd = DIV_ROUND_UP(2000, clkper) - 1; | |
303 | taofpd = taonpd; | |
304 | trp = DIV_ROUND_UP(m->trcd, clkper/10) - 1; | |
305 | trcd = trp; | |
306 | trc = DIV_ROUND_UP(m->trcmin, clkper/10) - 1; | |
307 | tras = DIV_ROUND_UP(m->trasmin, clkper/10) - 1; | |
308 | twr = DIV_ROUND_UP(15000, clkper) - 1; | |
309 | tmrd = DIV_ROUND_UP(MAX(12*clkper, 15000), clkper) - 1; | |
310 | twtr = ROUND(MAX(4*clkper, 7500)/clkper, 1) - 1; | |
311 | trtp = twtr; | |
312 | CS0_END = ((4*i->cs_density) <= 120) ? (4*i->cs_density)+7 : 127; | |
313 | debug("density:%d Gb (%d Gb per chip)\n", i->cs_density, m->density); | |
314 | debug("clock: %dMHz (%d ps)\n", clock, clkper); | |
315 | debug("memspd:%d\n", m->mem_speed); | |
316 | debug("tcke=%d\n", tcke); | |
317 | debug("tcksrx=%d\n", tcksrx); | |
318 | debug("tcksre=%d\n", tcksre); | |
319 | debug("taofpd=%d\n", taofpd); | |
320 | debug("taonpd=%d\n", taonpd); | |
321 | debug("todtlon=%d\n", todtlon); | |
322 | debug("tanpd=%d\n", tanpd); | |
323 | debug("taxpd=%d\n", taxpd); | |
324 | debug("trfc=%d\n", trfc); | |
325 | debug("txs=%d\n", txs); | |
326 | debug("txp=%d\n", txp); | |
327 | debug("txpdll=%d\n", txpdll); | |
328 | debug("tfaw=%d\n", tfaw); | |
329 | debug("tcl=%d\n", tcl); | |
330 | debug("trcd=%d\n", trcd); | |
331 | debug("trp=%d\n", trp); | |
332 | debug("trc=%d\n", trc); | |
333 | debug("tras=%d\n", tras); | |
334 | debug("twr=%d\n", twr); | |
335 | debug("tmrd=%d\n", tmrd); | |
336 | debug("tcwl=%d\n", tcwl); | |
337 | debug("tdllk=%d\n", tdllk); | |
338 | debug("trtp=%d\n", trtp); | |
339 | debug("twtr=%d\n", twtr); | |
340 | debug("trrd=%d\n", trrd); | |
341 | debug("txpr=%d\n", txpr); | |
342 | debug("CS0_END=%d\n", CS0_END); | |
343 | debug("ncs=%d\n", i->ncs); | |
344 | debug("Rtt_wr=%d\n", i->rtt_wr); | |
345 | debug("Rtt_nom=%d\n", i->rtt_nom); | |
346 | debug("SRT=%d\n", m->SRT); | |
347 | debug("tcl=%d\n", tcl); | |
348 | debug("twr=%d\n", twr); | |
349 | ||
350 | /* | |
351 | * board-specific configuration: | |
352 | * These values are determined empirically and vary per board layout | |
353 | * see: | |
354 | * appnote, ddr3 spreadsheet | |
355 | */ | |
356 | mmdc0->mpwldectrl0 = c->p0_mpwldectrl0; | |
357 | mmdc0->mpwldectrl1 = c->p0_mpwldectrl1; | |
358 | mmdc0->mpdgctrl0 = c->p0_mpdgctrl0; | |
359 | mmdc0->mpdgctrl1 = c->p0_mpdgctrl1; | |
360 | mmdc0->mprddlctl = c->p0_mprddlctl; | |
361 | mmdc0->mpwrdlctl = c->p0_mpwrdlctl; | |
362 | if (i->dsize > 1) { | |
363 | mmdc1->mpwldectrl0 = c->p1_mpwldectrl0; | |
364 | mmdc1->mpwldectrl1 = c->p1_mpwldectrl1; | |
365 | mmdc1->mpdgctrl0 = c->p1_mpdgctrl0; | |
366 | mmdc1->mpdgctrl1 = c->p1_mpdgctrl1; | |
367 | mmdc1->mprddlctl = c->p1_mprddlctl; | |
368 | mmdc1->mpwrdlctl = c->p1_mpwrdlctl; | |
369 | } | |
370 | ||
371 | /* Read data DQ Byte0-3 delay */ | |
372 | mmdc0->mprddqby0dl = (u32)0x33333333; | |
373 | mmdc0->mprddqby1dl = (u32)0x33333333; | |
374 | if (i->dsize > 0) { | |
375 | mmdc0->mprddqby2dl = (u32)0x33333333; | |
376 | mmdc0->mprddqby3dl = (u32)0x33333333; | |
377 | } | |
378 | if (i->dsize > 1) { | |
379 | mmdc1->mprddqby0dl = (u32)0x33333333; | |
380 | mmdc1->mprddqby1dl = (u32)0x33333333; | |
381 | mmdc1->mprddqby2dl = (u32)0x33333333; | |
382 | mmdc1->mprddqby3dl = (u32)0x33333333; | |
383 | } | |
384 | ||
385 | /* MMDC Termination: rtt_nom:2 RZQ/2(120ohm), rtt_nom:1 RZQ/4(60ohm) */ | |
386 | reg = (i->rtt_nom == 2) ? 0x00011117 : 0x00022227; | |
387 | mmdc0->mpodtctrl = reg; | |
388 | if (i->dsize > 1) | |
389 | mmdc1->mpodtctrl = reg; | |
390 | ||
391 | /* complete calibration */ | |
392 | reg = (1 << 11); /* Force measurement on delay-lines */ | |
393 | mmdc0->mpmur0 = reg; | |
394 | if (i->dsize > 1) | |
395 | mmdc1->mpmur0 = reg; | |
396 | ||
397 | /* Step 1: configuration request */ | |
398 | mmdc0->mdscr = (u32)(1 << 15); /* config request */ | |
399 | ||
400 | /* Step 2: Timing configuration */ | |
401 | reg = (trfc << 24) | (txs << 16) | (txp << 13) | (txpdll << 9) | | |
402 | (tfaw << 4) | tcl; | |
403 | mmdc0->mdcfg0 = reg; | |
404 | reg = (trcd << 29) | (trp << 26) | (trc << 21) | (tras << 16) | | |
405 | (1 << 15) | /* trpa */ | |
406 | (twr << 9) | (tmrd << 5) | tcwl; | |
407 | mmdc0->mdcfg1 = reg; | |
408 | reg = (tdllk << 16) | (trtp << 6) | (twtr << 3) | trrd; | |
409 | mmdc0->mdcfg2 = reg; | |
410 | reg = (taofpd << 27) | (taonpd << 24) | (tanpd << 20) | (taxpd << 16) | | |
411 | (todtlon << 12) | (todt_idle_off << 4); | |
412 | mmdc0->mdotc = reg; | |
413 | mmdc0->mdasp = CS0_END; /* CS addressing */ | |
414 | ||
415 | /* Step 3: Configure DDR type */ | |
416 | reg = (i->cs1_mirror << 19) | (i->walat << 16) | (i->bi_on << 12) | | |
417 | (i->mif3_mode << 9) | (i->ralat << 6); | |
418 | mmdc0->mdmisc = reg; | |
419 | ||
420 | /* Step 4: Configure delay while leaving reset */ | |
421 | reg = (txpr << 16) | (i->sde_to_rst << 8) | (i->rst_to_cke << 0); | |
422 | mmdc0->mdor = reg; | |
423 | ||
424 | /* Step 5: Configure DDR physical parameters (density and burst len) */ | |
425 | reg = (m->rowaddr - 11) << 24 | /* ROW */ | |
426 | (m->coladdr - 9) << 20 | /* COL */ | |
427 | (1 << 19) | /* Burst Length = 8 for DDR3 */ | |
428 | (i->dsize << 16); /* DDR data bus size */ | |
429 | mmdc0->mdctl = reg; | |
430 | ||
431 | /* Step 6: Perform ZQ calibration */ | |
432 | reg = (u32)0xa1390001; /* one-time HW ZQ calib */ | |
433 | mmdc0->mpzqhwctrl = reg; | |
434 | if (i->dsize > 1) | |
435 | mmdc1->mpzqhwctrl = reg; | |
436 | ||
437 | /* Step 7: Enable MMDC with desired chip select */ | |
438 | reg = mmdc0->mdctl | | |
439 | (1 << 31) | /* SDE_0 for CS0 */ | |
440 | ((i->ncs == 2) ? 1 : 0) << 30; /* SDE_1 for CS1 */ | |
441 | mmdc0->mdctl = reg; | |
442 | ||
443 | /* Step 8: Write Mode Registers to Init DDR3 devices */ | |
444 | for (cs = 0; cs < i->ncs; cs++) { | |
445 | /* MR2 */ | |
446 | reg = (i->rtt_wr & 3) << 9 | (m->SRT & 1) << 7 | | |
447 | ((tcwl - 3) & 3) << 3; | |
448 | mmdc0->mdscr = (u32)MR(reg, 2, 3, cs); | |
449 | /* MR3 */ | |
450 | mmdc0->mdscr = (u32)MR(0, 3, 3, cs); | |
451 | /* MR1 */ | |
452 | reg = ((i->rtt_nom & 1) ? 1 : 0) << 2 | | |
453 | ((i->rtt_nom & 2) ? 1 : 0) << 6; | |
454 | mmdc0->mdscr = (u32)MR(reg, 1, 3, cs); | |
455 | reg = ((tcl - 1) << 4) | /* CAS */ | |
456 | (1 << 8) | /* DLL Reset */ | |
457 | ((twr - 3) << 9); /* Write Recovery */ | |
458 | /* MR0 */ | |
459 | mmdc0->mdscr = (u32)MR(reg, 0, 3, cs); | |
460 | /* ZQ calibration */ | |
461 | reg = (1 << 10); | |
462 | mmdc0->mdscr = (u32)MR(reg, 0, 4, cs); | |
463 | } | |
464 | ||
465 | /* Step 10: Power down control and self-refresh */ | |
466 | reg = (tcke & 0x7) << 16 | | |
467 | 5 << 12 | /* PWDT_1: 256 cycles */ | |
468 | 5 << 8 | /* PWDT_0: 256 cycles */ | |
469 | 1 << 6 | /* BOTH_CS_PD */ | |
470 | (tcksrx & 0x7) << 3 | | |
471 | (tcksre & 0x7); | |
472 | mmdc0->mdpdc = reg; | |
473 | mmdc0->mapsr = (u32)0x00011006; /* ADOPT power down enabled */ | |
474 | ||
475 | /* Step 11: Configure ZQ calibration: one-time and periodic 1ms */ | |
476 | mmdc0->mpzqhwctrl = (u32)0xa1390003; | |
477 | if (i->dsize > 1) | |
478 | mmdc1->mpzqhwctrl = (u32)0xa1390003; | |
479 | ||
480 | /* Step 12: Configure and activate periodic refresh */ | |
481 | reg = (1 << 14) | /* REF_SEL: Periodic refresh cycles of 32kHz */ | |
482 | (7 << 11); /* REFR: Refresh Rate - 8 refreshes */ | |
483 | mmdc0->mdref = reg; | |
484 | ||
485 | /* Step 13: Deassert config request - init complete */ | |
486 | mmdc0->mdscr = (u32)0x00000000; | |
487 | ||
488 | /* wait for auto-ZQ calibration to complete */ | |
489 | mdelay(1); | |
490 | } |