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 <asm/io.h>
10 #include <asm/arch/crm_regs.h>
11 #include <asm/arch/mx6-ddr.h>
12 #include <asm/arch/mx6-pins.h>
13 #include <asm/arch/sys_proto.h>
14 #include <asm/imx-common/boot_mode.h>
15 #include <asm/imx-common/iomux-v3.h>
16 #include <asm/imx-common/mxc_i2c.h>
17 #include <environment.h>
18 #include <i2c.h>
19 #include <spl.h>
20 
21 #include "gsc.h"
22 #include "common.h"
23 
24 DECLARE_GLOBAL_DATA_PTR;
25 
26 #define RTT_NOM_120OHM /* use 120ohm Rtt_nom vs 60ohm (lower power) */
27 #define GSC_EEPROM_DDR_SIZE	0x2B	/* enum (512,1024,2048) MB */
28 #define GSC_EEPROM_DDR_WIDTH	0x2D	/* enum (32,64) bit */
29 
30 /* configure MX6Q/DUAL mmdc DDR io registers */
31 struct mx6dq_iomux_ddr_regs mx6dq_ddr_ioregs = {
32 	/* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
33 	.dram_sdclk_0 = 0x00020030,
34 	.dram_sdclk_1 = 0x00020030,
35 	.dram_cas = 0x00020030,
36 	.dram_ras = 0x00020030,
37 	.dram_reset = 0x00020030,
38 	/* SDCKE[0:1]: 100k pull-up */
39 	.dram_sdcke0 = 0x00003000,
40 	.dram_sdcke1 = 0x00003000,
41 	/* SDBA2: pull-up disabled */
42 	.dram_sdba2 = 0x00000000,
43 	/* SDODT[0:1]: 100k pull-up, 40 ohm */
44 	.dram_sdodt0 = 0x00003030,
45 	.dram_sdodt1 = 0x00003030,
46 	/* SDQS[0:7]: Differential input, 40 ohm */
47 	.dram_sdqs0 = 0x00000030,
48 	.dram_sdqs1 = 0x00000030,
49 	.dram_sdqs2 = 0x00000030,
50 	.dram_sdqs3 = 0x00000030,
51 	.dram_sdqs4 = 0x00000030,
52 	.dram_sdqs5 = 0x00000030,
53 	.dram_sdqs6 = 0x00000030,
54 	.dram_sdqs7 = 0x00000030,
55 
56 	/* DQM[0:7]: Differential input, 40 ohm */
57 	.dram_dqm0 = 0x00020030,
58 	.dram_dqm1 = 0x00020030,
59 	.dram_dqm2 = 0x00020030,
60 	.dram_dqm3 = 0x00020030,
61 	.dram_dqm4 = 0x00020030,
62 	.dram_dqm5 = 0x00020030,
63 	.dram_dqm6 = 0x00020030,
64 	.dram_dqm7 = 0x00020030,
65 };
66 
67 /* configure MX6Q/DUAL mmdc GRP io registers */
68 struct mx6dq_iomux_grp_regs mx6dq_grp_ioregs = {
69 	/* DDR3 */
70 	.grp_ddr_type = 0x000c0000,
71 	.grp_ddrmode_ctl = 0x00020000,
72 	/* disable DDR pullups */
73 	.grp_ddrpke = 0x00000000,
74 	/* ADDR[00:16], SDBA[0:1]: 40 ohm */
75 	.grp_addds = 0x00000030,
76 	/* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
77 	.grp_ctlds = 0x00000030,
78 	/* DATA[00:63]: Differential input, 40 ohm */
79 	.grp_ddrmode = 0x00020000,
80 	.grp_b0ds = 0x00000030,
81 	.grp_b1ds = 0x00000030,
82 	.grp_b2ds = 0x00000030,
83 	.grp_b3ds = 0x00000030,
84 	.grp_b4ds = 0x00000030,
85 	.grp_b5ds = 0x00000030,
86 	.grp_b6ds = 0x00000030,
87 	.grp_b7ds = 0x00000030,
88 };
89 
90 /* configure MX6SOLO/DUALLITE mmdc DDR io registers */
91 struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
92 	/* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
93 	.dram_sdclk_0 = 0x00020030,
94 	.dram_sdclk_1 = 0x00020030,
95 	.dram_cas = 0x00020030,
96 	.dram_ras = 0x00020030,
97 	.dram_reset = 0x00020030,
98 	/* SDCKE[0:1]: 100k pull-up */
99 	.dram_sdcke0 = 0x00003000,
100 	.dram_sdcke1 = 0x00003000,
101 	/* SDBA2: pull-up disabled */
102 	.dram_sdba2 = 0x00000000,
103 	/* SDODT[0:1]: 100k pull-up, 40 ohm */
104 	.dram_sdodt0 = 0x00003030,
105 	.dram_sdodt1 = 0x00003030,
106 	/* SDQS[0:7]: Differential input, 40 ohm */
107 	.dram_sdqs0 = 0x00000030,
108 	.dram_sdqs1 = 0x00000030,
109 	.dram_sdqs2 = 0x00000030,
110 	.dram_sdqs3 = 0x00000030,
111 	.dram_sdqs4 = 0x00000030,
112 	.dram_sdqs5 = 0x00000030,
113 	.dram_sdqs6 = 0x00000030,
114 	.dram_sdqs7 = 0x00000030,
115 
116 	/* DQM[0:7]: Differential input, 40 ohm */
117 	.dram_dqm0 = 0x00020030,
118 	.dram_dqm1 = 0x00020030,
119 	.dram_dqm2 = 0x00020030,
120 	.dram_dqm3 = 0x00020030,
121 	.dram_dqm4 = 0x00020030,
122 	.dram_dqm5 = 0x00020030,
123 	.dram_dqm6 = 0x00020030,
124 	.dram_dqm7 = 0x00020030,
125 };
126 
127 /* configure MX6SOLO/DUALLITE mmdc GRP io registers */
128 struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
129 	/* DDR3 */
130 	.grp_ddr_type = 0x000c0000,
131 	/* SDQS[0:7]: Differential input, 40 ohm */
132 	.grp_ddrmode_ctl = 0x00020000,
133 	/* disable DDR pullups */
134 	.grp_ddrpke = 0x00000000,
135 	/* ADDR[00:16], SDBA[0:1]: 40 ohm */
136 	.grp_addds = 0x00000030,
137 	/* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
138 	.grp_ctlds = 0x00000030,
139 	/* DATA[00:63]: Differential input, 40 ohm */
140 	.grp_ddrmode = 0x00020000,
141 	.grp_b0ds = 0x00000030,
142 	.grp_b1ds = 0x00000030,
143 	.grp_b2ds = 0x00000030,
144 	.grp_b3ds = 0x00000030,
145 	.grp_b4ds = 0x00000030,
146 	.grp_b5ds = 0x00000030,
147 	.grp_b6ds = 0x00000030,
148 	.grp_b7ds = 0x00000030,
149 };
150 
151 /* MT41K64M16JT-125 (1Gb density) */
152 static struct mx6_ddr3_cfg mt41k64m16jt_125 = {
153 	.mem_speed = 1600,
154 	.density = 1,
155 	.width = 16,
156 	.banks = 8,
157 	.rowaddr = 13,
158 	.coladdr = 10,
159 	.pagesz = 2,
160 	.trcd = 1375,
161 	.trcmin = 4875,
162 	.trasmin = 3500,
163 };
164 
165 /* MT41K128M16JT-125 (2Gb density) */
166 static struct mx6_ddr3_cfg mt41k128m16jt_125 = {
167 	.mem_speed = 1600,
168 	.density = 2,
169 	.width = 16,
170 	.banks = 8,
171 	.rowaddr = 14,
172 	.coladdr = 10,
173 	.pagesz = 2,
174 	.trcd = 1375,
175 	.trcmin = 4875,
176 	.trasmin = 3500,
177 };
178 
179 /* MT41K256M16HA-125 (4Gb density) */
180 static struct mx6_ddr3_cfg mt41k256m16ha_125 = {
181 	.mem_speed = 1600,
182 	.density = 4,
183 	.width = 16,
184 	.banks = 8,
185 	.rowaddr = 15,
186 	.coladdr = 10,
187 	.pagesz = 2,
188 	.trcd = 1375,
189 	.trcmin = 4875,
190 	.trasmin = 3500,
191 };
192 
193 /* MT41K512M16HA-125 (8Gb density) */
194 static struct mx6_ddr3_cfg mt41k512m16ha_125 = {
195 	.mem_speed = 1600,
196 	.density = 8,
197 	.width = 16,
198 	.banks = 8,
199 	.rowaddr = 16,
200 	.coladdr = 10,
201 	.pagesz = 2,
202 	.trcd = 1375,
203 	.trcmin = 4875,
204 	.trasmin = 3500,
205 };
206 
207 /*
208  * calibration - these are the various CPU/DDR3 combinations we support
209  */
210 static struct mx6_mmdc_calibration mx6sdl_64x16_mmdc_calib = {
211 	/* write leveling calibration determine */
212 	.p0_mpwldectrl0 = 0x004C004E,
213 	.p0_mpwldectrl1 = 0x00440044,
214 	/* Read DQS Gating calibration */
215 	.p0_mpdgctrl0 = 0x42440247,
216 	.p0_mpdgctrl1 = 0x02310232,
217 	/* Read Calibration: DQS delay relative to DQ read access */
218 	.p0_mprddlctl = 0x45424746,
219 	/* Write Calibration: DQ/DM delay relative to DQS write access */
220 	.p0_mpwrdlctl = 0x33382C31,
221 };
222 
223 static struct mx6_mmdc_calibration mx6dq_256x16_mmdc_calib = {
224 	/* write leveling calibration determine */
225 	.p0_mpwldectrl0 = 0x001B0016,
226 	.p0_mpwldectrl1 = 0x000C000E,
227 	/* Read DQS Gating calibration */
228 	.p0_mpdgctrl0 = 0x4324033A,
229 	.p0_mpdgctrl1 = 0x00000000,
230 	/* Read Calibration: DQS delay relative to DQ read access */
231 	.p0_mprddlctl = 0x40403438,
232 	/* Write Calibration: DQ/DM delay relative to DQS write access */
233 	.p0_mpwrdlctl = 0x40403D36,
234 };
235 
236 static struct mx6_mmdc_calibration mx6sdl_256x16_mmdc_calib = {
237 	/* write leveling calibration determine */
238 	.p0_mpwldectrl0 = 0x00420043,
239 	.p0_mpwldectrl1 = 0x0016001A,
240 	/* Read DQS Gating calibration */
241 	.p0_mpdgctrl0 = 0x4238023B,
242 	.p0_mpdgctrl1 = 0x00000000,
243 	/* Read Calibration: DQS delay relative to DQ read access */
244 	.p0_mprddlctl = 0x40404849,
245 	/* Write Calibration: DQ/DM delay relative to DQS write access */
246 	.p0_mpwrdlctl = 0x40402E2F,
247 };
248 
249 static struct mx6_mmdc_calibration mx6dq_128x32_mmdc_calib = {
250 	/* write leveling calibration determine */
251 	.p0_mpwldectrl0 = 0x00190017,
252 	.p0_mpwldectrl1 = 0x00140026,
253 	/* Read DQS Gating calibration */
254 	.p0_mpdgctrl0 = 0x43380347,
255 	.p0_mpdgctrl1 = 0x433C034D,
256 	/* Read Calibration: DQS delay relative to DQ read access */
257 	.p0_mprddlctl = 0x3C313539,
258 	/* Write Calibration: DQ/DM delay relative to DQS write access */
259 	.p0_mpwrdlctl = 0x36393C39,
260 };
261 
262 static struct mx6_mmdc_calibration mx6sdl_128x32_mmdc_calib = {
263 	/* write leveling calibration determine */
264 	.p0_mpwldectrl0 = 0x003C003C,
265 	.p0_mpwldectrl1 = 0x001F002A,
266 	/* Read DQS Gating calibration */
267 	.p0_mpdgctrl0 = 0x42410244,
268 	.p0_mpdgctrl1 = 0x4234023A,
269 	/* Read Calibration: DQS delay relative to DQ read access */
270 	.p0_mprddlctl = 0x484A4C4B,
271 	/* Write Calibration: DQ/DM delay relative to DQS write access */
272 	.p0_mpwrdlctl = 0x33342B32,
273 };
274 
275 static struct mx6_mmdc_calibration mx6dq_128x64_mmdc_calib = {
276 	/* write leveling calibration determine */
277 	.p0_mpwldectrl0 = 0x00190017,
278 	.p0_mpwldectrl1 = 0x00140026,
279 	.p1_mpwldectrl0 = 0x0021001C,
280 	.p1_mpwldectrl1 = 0x0011001D,
281 	/* Read DQS Gating calibration */
282 	.p0_mpdgctrl0 = 0x43380347,
283 	.p0_mpdgctrl1 = 0x433C034D,
284 	.p1_mpdgctrl0 = 0x032C0324,
285 	.p1_mpdgctrl1 = 0x03310232,
286 	/* Read Calibration: DQS delay relative to DQ read access */
287 	.p0_mprddlctl = 0x3C313539,
288 	.p1_mprddlctl = 0x37343141,
289 	/* Write Calibration: DQ/DM delay relative to DQS write access */
290 	.p0_mpwrdlctl = 0x36393C39,
291 	.p1_mpwrdlctl = 0x42344438,
292 };
293 
294 static struct mx6_mmdc_calibration mx6sdl_128x64_mmdc_calib = {
295 	/* write leveling calibration determine */
296 	.p0_mpwldectrl0 = 0x003C003C,
297 	.p0_mpwldectrl1 = 0x001F002A,
298 	.p1_mpwldectrl0 = 0x00330038,
299 	.p1_mpwldectrl1 = 0x0022003F,
300 	/* Read DQS Gating calibration */
301 	.p0_mpdgctrl0 = 0x42410244,
302 	.p0_mpdgctrl1 = 0x4234023A,
303 	.p1_mpdgctrl0 = 0x022D022D,
304 	.p1_mpdgctrl1 = 0x021C0228,
305 	/* Read Calibration: DQS delay relative to DQ read access */
306 	.p0_mprddlctl = 0x484A4C4B,
307 	.p1_mprddlctl = 0x4B4D4E4B,
308 	/* Write Calibration: DQ/DM delay relative to DQS write access */
309 	.p0_mpwrdlctl = 0x33342B32,
310 	.p1_mpwrdlctl = 0x3933332B,
311 };
312 
313 static struct mx6_mmdc_calibration mx6dq_256x32_mmdc_calib = {
314 	/* write leveling calibration determine */
315 	.p0_mpwldectrl0 = 0x001E001A,
316 	.p0_mpwldectrl1 = 0x0026001F,
317 	/* Read DQS Gating calibration */
318 	.p0_mpdgctrl0 = 0x43370349,
319 	.p0_mpdgctrl1 = 0x032D0327,
320 	/* Read Calibration: DQS delay relative to DQ read access */
321 	.p0_mprddlctl = 0x3D303639,
322 	/* Write Calibration: DQ/DM delay relative to DQS write access */
323 	.p0_mpwrdlctl = 0x32363934,
324 };
325 
326 static struct mx6_mmdc_calibration mx6sdl_256x32_mmdc_calib = {
327 	/* write leveling calibration determine */
328 	.p0_mpwldectrl0 = 0X00480047,
329 	.p0_mpwldectrl1 = 0X003D003F,
330 	/* Read DQS Gating calibration */
331 	.p0_mpdgctrl0 = 0X423E0241,
332 	.p0_mpdgctrl1 = 0X022B022C,
333 	/* Read Calibration: DQS delay relative to DQ read access */
334 	.p0_mprddlctl = 0X49454A4A,
335 	/* Write Calibration: DQ/DM delay relative to DQS write access */
336 	.p0_mpwrdlctl = 0X2E372C32,
337 };
338 
339 static struct mx6_mmdc_calibration mx6dq_256x64_mmdc_calib = {
340 	/* write leveling calibration determine */
341 	.p0_mpwldectrl0 = 0X00220021,
342 	.p0_mpwldectrl1 = 0X00200030,
343 	.p1_mpwldectrl0 = 0X002D0027,
344 	.p1_mpwldectrl1 = 0X00150026,
345 	/* Read DQS Gating calibration */
346 	.p0_mpdgctrl0 = 0x43330342,
347 	.p0_mpdgctrl1 = 0x0339034A,
348 	.p1_mpdgctrl0 = 0x032F0325,
349 	.p1_mpdgctrl1 = 0x032F022E,
350 	/* Read Calibration: DQS delay relative to DQ read access */
351 	.p0_mprddlctl = 0X3A2E3437,
352 	.p1_mprddlctl = 0X35312F3F,
353 	/* Write Calibration: DQ/DM delay relative to DQS write access */
354 	.p0_mpwrdlctl = 0X33363B37,
355 	.p1_mpwrdlctl = 0X40304239,
356 };
357 
358 static struct mx6_mmdc_calibration mx6dq_512x32_mmdc_calib = {
359 	/* write leveling calibration determine */
360 	.p0_mpwldectrl0 = 0x002A0025,
361 	.p0_mpwldectrl1 = 0x003A002A,
362 	/* Read DQS Gating calibration */
363 	.p0_mpdgctrl0 = 0x43430356,
364 	.p0_mpdgctrl1 = 0x033C0335,
365 	/* Read Calibration: DQS delay relative to DQ read access */
366 	.p0_mprddlctl = 0x4B373F42,
367 	/* Write Calibration: DQ/DM delay relative to DQS write access */
368 	.p0_mpwrdlctl = 0x303E3C36,
369 };
370 
371 static void spl_dram_init(int width, int size_mb, int board_model)
372 {
373 	struct mx6_ddr3_cfg *mem = NULL;
374 	struct mx6_mmdc_calibration *calib = NULL;
375 	struct mx6_ddr_sysinfo sysinfo = {
376 		/* width of data bus:0=16,1=32,2=64 */
377 		.dsize = width/32,
378 		/* config for full 4GB range so that get_mem_size() works */
379 		.cs_density = 32, /* 32Gb per CS */
380 		/* single chip select */
381 		.ncs = 1,
382 		.cs1_mirror = 0,
383 		.rtt_wr = 1 /*DDR3_RTT_60_OHM*/,	/* RTT_Wr = RZQ/4 */
384 #ifdef RTT_NOM_120OHM
385 		.rtt_nom = 2 /*DDR3_RTT_120_OHM*/,	/* RTT_Nom = RZQ/2 */
386 #else
387 		.rtt_nom = 1 /*DDR3_RTT_60_OHM*/,	/* RTT_Nom = RZQ/4 */
388 #endif
389 		.walat = 1,	/* Write additional latency */
390 		.ralat = 5,	/* Read additional latency */
391 		.mif3_mode = 3,	/* Command prediction working mode */
392 		.bi_on = 1,	/* Bank interleaving enabled */
393 		.sde_to_rst = 0x10,	/* 14 cycles, 200us (JEDEC default) */
394 		.rst_to_cke = 0x23,	/* 33 cycles, 500us (JEDEC default) */
395 		.pd_fast_exit = 1, /* enable precharge power-down fast exit */
396 		.ddr_type = DDR_TYPE_DDR3,
397 		.refsel = 1,	/* Refresh cycles at 32KHz */
398 		.refr = 7,	/* 8 refresh commands per refresh cycle */
399 	};
400 
401 	/*
402 	 * MMDC Calibration requires the following data:
403 	 *   mx6_mmdc_calibration - board-specific calibration (routing delays)
404 	 *      these calibration values depend on board routing, SoC, and DDR
405 	 *   mx6_ddr_sysinfo - board-specific memory architecture (width/cs/etc)
406 	 *   mx6_ddr_cfg - chip specific timing/layout details
407 	 */
408 	if (width == 16 && size_mb == 128) {
409 		mem = &mt41k64m16jt_125;
410 		if (is_cpu_type(MXC_CPU_MX6Q))
411 			;
412 		else
413 			calib = &mx6sdl_64x16_mmdc_calib;
414 		debug("1gB density\n");
415 	} else if (width == 16 && size_mb == 256) {
416 		/* 1x 2Gb density chip - same calib as 2x 2Gb */
417 		mem = &mt41k128m16jt_125;
418 		if (is_cpu_type(MXC_CPU_MX6Q))
419 			calib = &mx6dq_128x32_mmdc_calib;
420 		else
421 			calib = &mx6sdl_128x32_mmdc_calib;
422 		debug("2gB density\n");
423 	} else if (width == 16 && size_mb == 512) {
424 		mem = &mt41k256m16ha_125;
425 		if (is_cpu_type(MXC_CPU_MX6Q))
426 			calib = &mx6dq_256x16_mmdc_calib;
427 		else
428 			calib = &mx6sdl_256x16_mmdc_calib;
429 		debug("4gB density\n");
430 	} else if (width == 32 && size_mb == 256) {
431 		/* Same calib as width==16, size==128 */
432 		mem = &mt41k64m16jt_125;
433 		if (is_cpu_type(MXC_CPU_MX6Q))
434 			;
435 		else
436 			calib = &mx6sdl_64x16_mmdc_calib;
437 		debug("1gB density\n");
438 	} else if (width == 32 && size_mb == 512) {
439 		mem = &mt41k128m16jt_125;
440 		if (is_cpu_type(MXC_CPU_MX6Q))
441 			calib = &mx6dq_128x32_mmdc_calib;
442 		else
443 			calib = &mx6sdl_128x32_mmdc_calib;
444 		debug("2gB density\n");
445 	}  else if (width == 32 && size_mb == 1024) {
446 		mem = &mt41k256m16ha_125;
447 		if (is_cpu_type(MXC_CPU_MX6Q))
448 			calib = &mx6dq_256x32_mmdc_calib;
449 		else
450 			calib = &mx6sdl_256x32_mmdc_calib;
451 		debug("4gB density\n");
452 	} else if (width == 32 && size_mb == 2048) {
453 		mem = &mt41k512m16ha_125;
454 		if (is_cpu_type(MXC_CPU_MX6Q))
455 			calib = &mx6dq_512x32_mmdc_calib;
456 		debug("8gB density\n");
457 	} else if (width == 64 && size_mb == 512) {
458 		mem = &mt41k64m16jt_125;
459 		debug("1gB density\n");
460 	} else if (width == 64 && size_mb == 1024) {
461 		mem = &mt41k128m16jt_125;
462 		if (is_cpu_type(MXC_CPU_MX6Q))
463 			calib = &mx6dq_128x64_mmdc_calib;
464 		else
465 			calib = &mx6sdl_128x64_mmdc_calib;
466 		debug("2gB density\n");
467 	} else if (width == 64 && size_mb == 2048) {
468 		mem = &mt41k256m16ha_125;
469 		if (is_cpu_type(MXC_CPU_MX6Q))
470 			calib = &mx6dq_256x64_mmdc_calib;
471 		debug("4gB density\n");
472 	}
473 
474 	if (!(mem && calib)) {
475 		puts("Error: Invalid Calibration/Board Configuration\n");
476 		printf("MEM    : %s\n", mem ? "OKAY" : "NULL");
477 		printf("CALIB  : %s\n", calib ? "OKAY" : "NULL");
478 		printf("CPUTYPE: %s\n",
479 		       is_cpu_type(MXC_CPU_MX6Q) ? "IMX6Q" : "IMX6DL");
480 		printf("SIZE_MB: %d\n", size_mb);
481 		printf("WIDTH  : %d\n", width);
482 		hang();
483 	}
484 
485 	if (is_cpu_type(MXC_CPU_MX6Q))
486 		mx6dq_dram_iocfg(width, &mx6dq_ddr_ioregs,
487 				 &mx6dq_grp_ioregs);
488 	else
489 		mx6sdl_dram_iocfg(width, &mx6sdl_ddr_ioregs,
490 				  &mx6sdl_grp_ioregs);
491 	mx6_dram_cfg(&sysinfo, calib, mem);
492 }
493 
494 static void ccgr_init(void)
495 {
496 	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
497 
498 	writel(0x00C03F3F, &ccm->CCGR0);
499 	writel(0x0030FC03, &ccm->CCGR1);
500 	writel(0x0FFFC000, &ccm->CCGR2);
501 	writel(0x3FF00000, &ccm->CCGR3);
502 	writel(0xFFFFF300, &ccm->CCGR4);	/* enable NAND/GPMI/BCH clks */
503 	writel(0x0F0000C3, &ccm->CCGR5);
504 	writel(0x000003FF, &ccm->CCGR6);
505 }
506 
507 static void gpr_init(void)
508 {
509 	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
510 
511 	/* enable AXI cache for VDOA/VPU/IPU */
512 	writel(0xF00000CF, &iomux->gpr[4]);
513 	/* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
514 	writel(0x007F007F, &iomux->gpr[6]);
515 	writel(0x007F007F, &iomux->gpr[7]);
516 }
517 
518 /*
519  * called from C runtime startup code (arch/arm/lib/crt0.S:_main)
520  * - we have a stack and a place to store GD, both in SRAM
521  * - no variable global data is available
522  */
523 void board_init_f(ulong dummy)
524 {
525 	struct ventana_board_info ventana_info;
526 	int board_model;
527 
528 	/* setup clock gating */
529 	ccgr_init();
530 
531 	/* setup AIPS and disable watchdog */
532 	arch_cpu_init();
533 
534 	/* setup AXI */
535 	gpr_init();
536 
537 	/* iomux and setup of i2c */
538 	setup_iomux_uart();
539 	setup_ventana_i2c();
540 
541 	/* setup GP timer */
542 	timer_init();
543 
544 	/* UART clocks enabled and gd valid - init serial console */
545 	preloader_console_init();
546 
547 	/* read/validate EEPROM info to determine board model and SDRAM cfg */
548 	board_model = read_eeprom(CONFIG_I2C_GSC, &ventana_info);
549 
550 	/* configure model-specific gpio */
551 	setup_iomux_gpio(board_model, &ventana_info);
552 
553 	/* provide some some default: 32bit 128MB */
554 	if (GW_UNKNOWN == board_model)
555 		hang();
556 
557 	/* configure MMDC for SDRAM width/size and per-model calibration */
558 	spl_dram_init(8 << ventana_info.sdram_width,
559 		      16 << ventana_info.sdram_size,
560 		      board_model);
561 
562 	/* Clear the BSS. */
563 	memset(__bss_start, 0, __bss_end - __bss_start);
564 }
565 
566 /* called from board_init_r after gd setup if CONFIG_SPL_BOARD_INIT defined */
567 /* its our chance to print info about boot device */
568 void spl_board_init(void)
569 {
570 	/* determine boot device from SRC_SBMR1 (BOOT_CFG[4:1]) or SRC_GPR9 */
571 	u32 boot_device = spl_boot_device();
572 
573 	switch (boot_device) {
574 	case BOOT_DEVICE_MMC1:
575 		puts("Booting from MMC\n");
576 		break;
577 	case BOOT_DEVICE_NAND:
578 		puts("Booting from NAND\n");
579 		break;
580 	case BOOT_DEVICE_SATA:
581 		puts("Booting from SATA\n");
582 		break;
583 	default:
584 		puts("Unknown boot device\n");
585 	}
586 
587 	/* PMIC init */
588 	setup_pmic();
589 }
590 
591 #ifdef CONFIG_SPL_OS_BOOT
592 /* return 1 if we wish to boot to uboot vs os (falcon mode) */
593 int spl_start_uboot(void)
594 {
595 	unsigned char ret = 1;
596 
597 	debug("%s\n", __func__);
598 #ifdef CONFIG_SPL_ENV_SUPPORT
599 	env_init();
600 	env_relocate_spec();
601 	debug("boot_os=%s\n", getenv("boot_os"));
602 	if (getenv_yesno("boot_os") == 1)
603 		ret = 0;
604 #else
605 	/* use i2c-0:0x50:0x00 for falcon boot mode (0=linux, else uboot) */
606 	i2c_set_bus_num(0);
607 	gsc_i2c_read(0x50, 0x0, 1, &ret, 1);
608 #endif
609 	if (!ret)
610 		gsc_boot_wd_disable();
611 
612 	debug("%s booting %s\n", __func__, ret ? "uboot" : "linux");
613 	return ret;
614 }
615 #endif
616