1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2015 Google, Inc
4  */
5 #include <common.h>
6 #include <asm/io.h>
7 #include <asm/types.h>
8 #include <asm/arch/cru_rk3036.h>
9 #include <asm/arch/grf_rk3036.h>
10 #include <asm/arch/hardware.h>
11 #include <asm/arch/sdram_rk3036.h>
12 #include <asm/arch/timer.h>
13 #include <asm/arch/uart.h>
14 
15 /*
16  * we can not fit the code to access the device tree in SPL
17  * (due to 4K SRAM size limits), so these are hard-coded
18  */
19 #define CRU_BASE	0x20000000
20 #define GRF_BASE	0x20008000
21 #define DDR_PHY_BASE	0x2000a000
22 #define DDR_PCTL_BASE	0x20004000
23 #define CPU_AXI_BUS_BASE	0x10128000
24 
25 struct rk3036_sdram_priv {
26 	struct rk3036_cru *cru;
27 	struct rk3036_grf *grf;
28 	struct rk3036_ddr_phy *phy;
29 	struct rk3036_ddr_pctl *pctl;
30 	struct rk3036_service_sys *axi_bus;
31 
32 	/* ddr die config */
33 	struct rk3036_ddr_config ddr_config;
34 };
35 
36 /*
37  * use integer mode, dpll output 792MHz and ddr get 396MHz
38  * refdiv, fbdiv, postdiv1, postdiv2
39  */
40 const struct pll_div dpll_init_cfg = {1, 66, 2, 1};
41 
42 /* 396Mhz ddr timing */
43 const struct rk3036_ddr_timing ddr_timing = {0x18c,
44 	{0x18c, 0xc8, 0x1f4, 0x27, 0x4e,
45 	0x4, 0x8b, 0x06, 0x03, 0x0, 0x06, 0x05, 0x0f, 0x15, 0x06, 0x04, 0x04,
46 	0x06, 0x04, 0x200, 0x03, 0x0a, 0x40, 0x2710, 0x01, 0x05, 0x05, 0x03,
47 	0x0c, 0x28, 0x100, 0x0, 0x04, 0x0},
48 	{{0x420, 0x42, 0x0, 0x0}, 0x01, 0x60},
49 	{0x24717315} };
50 
51 /*
52  * [7:6]  bank(n:n bit bank)
53  * [5:4]  row(13+n)
54  * [3]    cs(0:1 cs, 1:2 cs)
55  * [2:1]  bank(n:n bit bank)
56  * [0]    col(10+n)
57  */
58 const char ddr_cfg_2_rbc[] = {
59 	((3 << 6) | (3 << 4) | (0 << 3) | (0 << 1) | 1),
60 	((0 << 6) | (1 << 4) | (0 << 3) | (3 << 1) | 0),
61 	((0 << 6) | (2 << 4) | (0 << 3) | (3 << 1) | 0),
62 	((0 << 6) | (3 << 4) | (0 << 3) | (3 << 1) | 0),
63 	((0 << 6) | (1 << 4) | (0 << 3) | (3 << 1) | 1),
64 	((0 << 6) | (2 << 4) | (0 << 3) | (3 << 1) | 1),
65 	((0 << 6) | (3 << 4) | (0 << 3) | (3 << 1) | 1),
66 	((0 << 6) | (0 << 4) | (0 << 3) | (3 << 1) | 0),
67 	((0 << 6) | (0 << 4) | (0 << 3) | (3 << 1) | 1),
68 	((0 << 6) | (3 << 4) | (1 << 3) | (3 << 1) | 0),
69 	((0 << 6) | (3 << 4) | (1 << 3) | (3 << 1) | 1),
70 	((1 << 6) | (2 << 4) | (0 << 3) | (2 << 1) | 0),
71 	((3 << 6) | (2 << 4) | (0 << 3) | (0 << 1) | 1),
72 	((3 << 6) | (3 << 4) | (0 << 3) | (0 << 1) | 0),
73 };
74 
75 /* DDRPHY REG */
76 enum {
77 	/* DDRPHY_REG1 */
78 	SOFT_RESET_MASK				= 3,
79 	SOFT_RESET_SHIFT			= 2,
80 
81 	/* DDRPHY_REG2 */
82 	MEMORY_SELECT_DDR3			= 0 << 6,
83 	DQS_SQU_CAL_NORMAL_MODE			= 0 << 1,
84 	DQS_SQU_CAL_START			= 1 << 0,
85 	DQS_SQU_NO_CAL				= 0 << 0,
86 
87 	/* DDRPHY_REG2A */
88 	CMD_DLL_BYPASS				= 1 << 4,
89 	CMD_DLL_BYPASS_DISABLE			= 0 << 4,
90 	HIGH_8BIT_DLL_BYPASS			= 1 << 3,
91 	HIGH_8BIT_DLL_BYPASS_DISABLE		= 0 << 3,
92 	LOW_8BIT_DLL_BYPASS			= 1 << 2,
93 	LOW_8BIT_DLL_BYPASS_DISABLE		= 0 << 2,
94 
95 	/* DDRPHY_REG19 */
96 	CMD_FEEDBACK_ENABLE			= 1 << 5,
97 	CMD_SLAVE_DLL_INVERSE_MODE		= 1 << 4,
98 	CMD_SLAVE_DLL_NO_INVERSE_MODE		= 0 << 4,
99 	CMD_SLAVE_DLL_ENALBE			= 1 << 3,
100 	CMD_TX_SLAVE_DLL_DELAY_MASK		= 7,
101 	CMD_TX_SLAVE_DLL_DELAY_SHIFT		= 0,
102 
103 	/* DDRPHY_REG6 */
104 	LEFT_CHN_TX_DQ_PHASE_BYPASS_90		= 1 << 4,
105 	LEFT_CHN_TX_DQ_PHASE_BYPASS_0		= 0 << 4,
106 	LEFT_CHN_TX_DQ_DLL_ENABLE		= 1 << 3,
107 	LEFT_CHN_TX_DQ_DLL_DELAY_MASK		= 7,
108 	LEFT_CHN_TX_DQ_DLL_DELAY_SHIFT		= 0,
109 
110 	/* DDRPHY_REG8 */
111 	LEFT_CHN_RX_DQS_DELAY_TAP_MASK		= 3,
112 	LEFT_CHN_RX_DQS_DELAY_TAP_SHIFT		= 0,
113 
114 	/* DDRPHY_REG9 */
115 	RIGHT_CHN_TX_DQ_PHASE_BYPASS_90		= 1 << 4,
116 	RIGHT_CHN_TX_DQ_PHASE_BYPASS_0		= 0 << 4,
117 	RIGHT_CHN_TX_DQ_DLL_ENABLE		= 1 << 3,
118 	RIGHT_CHN_TX_DQ_DLL_DELAY_MASK		= 7,
119 	RIGHT_CHN_TX_DQ_DLL_DELAY_SHIFT		= 0,
120 
121 	/* DDRPHY_REG11 */
122 	RIGHT_CHN_RX_DQS_DELAY_TAP_MASK		= 3,
123 	RIGHT_CHN_RX_DQS_DELAY_TAP_SHIFT	= 0,
124 
125 	/* DDRPHY_REG62 */
126 	CAL_DONE_MASK				= 3,
127 	HIGH_8BIT_CAL_DONE			= 1 << 1,
128 	LOW_8BIT_CAL_DONE			= 1 << 0,
129 };
130 
131 /* PTCL */
132 enum {
133 	/* PCTL_DFISTCFG0 */
134 	DFI_INIT_START			= 1 << 0,
135 	DFI_DATA_BYTE_DISABLE_EN	= 1 << 2,
136 
137 	/* PCTL_DFISTCFG1 */
138 	DFI_DRAM_CLK_SR_EN		= 1 << 0,
139 	DFI_DRAM_CLK_DPD_EN		= 1 << 1,
140 
141 	/* PCTL_DFISTCFG2 */
142 	DFI_PARITY_INTR_EN		= 1 << 0,
143 	DFI_PARITY_EN			= 1 << 1,
144 
145 	/* PCTL_DFILPCFG0 */
146 	TLP_RESP_TIME_SHIFT		= 16,
147 	LP_SR_EN			= 1 << 8,
148 	LP_PD_EN			= 1 << 0,
149 
150 	/* PCTL_DFIODTCFG */
151 	RANK0_ODT_WRITE_SEL		= 1 << 3,
152 	RANK1_ODT_WRITE_SEL		= 1 << 11,
153 
154 	/* PCTL_DFIODTCFG1 */
155 	ODT_LEN_BL8_W_SHIFT		= 16,
156 
157 	/* PCTL_MCFG */
158 	TFAW_CFG_MASK			= 3,
159 	TFAW_CFG_SHIFT			= 18,
160 	PD_EXIT_SLOW_MODE		= 0 << 17,
161 	PD_ACTIVE_POWER_DOWN		= 1 << 16,
162 	PD_IDLE_MASK			= 0xff,
163 	PD_IDLE_SHIFT			= 8,
164 	MEM_BL4				= 0 << 0,
165 	MEM_BL8				= 1 << 0,
166 
167 	/* PCTL_MCFG1 */
168 	HW_EXIT_IDLE_EN_MASK		= 1,
169 	HW_EXIT_IDLE_EN_SHIFT		= 31,
170 	SR_IDLE_MASK			= 0x1ff,
171 	SR_IDLE_SHIFT			= 0,
172 
173 	/* PCTL_SCFG */
174 	HW_LOW_POWER_EN			= 1 << 0,
175 
176 	/* PCTL_POWCTL */
177 	POWER_UP_START			= 1 << 0,
178 
179 	/* PCTL_POWSTAT */
180 	POWER_UP_DONE			= 1 << 0,
181 
182 	/* PCTL_MCMD */
183 	START_CMD			= 1 << 31,
184 	BANK_ADDR_MASK			= 7,
185 	BANK_ADDR_SHIFT			= 17,
186 	CMD_ADDR_MASK			= 0x1fff,
187 	CMD_ADDR_SHIFT			= 4,
188 	DESELECT_CMD			= 0,
189 	PREA_CMD,
190 	REF_CMD,
191 	MRS_CMD,
192 	ZQCS_CMD,
193 	ZQCL_CMD,
194 	RSTL_CMD,
195 	MRR_CMD				= 8,
196 
197 	/* PCTL_STAT */
198 	INIT_MEM			= 0,
199 	CONFIG,
200 	CONFIG_REQ,
201 	ACCESS,
202 	ACCESS_REQ,
203 	LOW_POWER,
204 	LOW_POWER_ENTRY_REQ,
205 	LOW_POWER_EXIT_REQ,
206 	PCTL_STAT_MASK			= 7,
207 
208 	/* PCTL_SCTL */
209 	INIT_STATE			= 0,
210 	CFG_STATE			= 1,
211 	GO_STATE			= 2,
212 	SLEEP_STATE			= 3,
213 	WAKEUP_STATE			= 4,
214 };
215 
216 /* GRF_SOC_CON2 */
217 #define	MSCH4_MAINDDR3		(1 << 7)
218 #define PHY_DRV_ODT_SET(n)	((n << 4) | n)
219 #define DDR3_DLL_RESET		(1 << 8)
220 
221 /* CK pull up/down driver strength control */
222 enum {
223 	PHY_RON_DISABLE		= 0,
224 	PHY_RON_309OHM		= 1,
225 	PHY_RON_155OHM,
226 	PHY_RON_103OHM		= 3,
227 	PHY_RON_63OHM		= 5,
228 	PHY_RON_45OHM		= 7,
229 	PHY_RON_77OHM,
230 	PHY_RON_62OHM,
231 	PHY_RON_52OHM,
232 	PHY_RON_44OHM,
233 	PHY_RON_39OHM,
234 	PHY_RON_34OHM,
235 	PHY_RON_31OHM,
236 	PHY_RON_28OHM,
237 };
238 
239 /* DQ pull up/down control */
240 enum {
241 	PHY_RTT_DISABLE		= 0,
242 	PHY_RTT_861OHM		= 1,
243 	PHY_RTT_431OHM,
244 	PHY_RTT_287OHM,
245 	PHY_RTT_216OHM,
246 	PHY_RTT_172OHM,
247 	PHY_RTT_145OHM,
248 	PHY_RTT_124OHM,
249 	PHY_RTT_215OHM,
250 	PHY_RTT_144OHM		= 0xa,
251 	PHY_RTT_123OHM,
252 	PHY_RTT_108OHM,
253 	PHY_RTT_96OHM,
254 	PHY_RTT_86OHM,
255 	PHY_RTT_78OHM,
256 };
257 
258 /* DQS squelch DLL delay */
259 enum {
260 	DQS_DLL_NO_DELAY	= 0,
261 	DQS_DLL_22P5_DELAY,
262 	DQS_DLL_45_DELAY,
263 	DQS_DLL_67P5_DELAY,
264 	DQS_DLL_90_DELAY,
265 	DQS_DLL_112P5_DELAY,
266 	DQS_DLL_135_DELAY,
267 	DQS_DLL_157P5_DELAY,
268 };
269 
270 /* GRF_OS_REG1 */
271 enum {
272 	/*
273 	 * 000: lpddr
274 	 * 001: ddr
275 	 * 010: ddr2
276 	 * 011: ddr3
277 	 * 100: lpddr2-s2
278 	 * 101: lpddr2-s4
279 	 * 110: lpddr3
280 	 */
281 	DDR_TYPE_MASK		= 7,
282 	DDR_TYPE_SHIFT		= 13,
283 
284 	/* 0: 1 chn, 1: 2 chn */
285 	DDR_CHN_CNT_SHIFT	= 12,
286 
287 	/* 0: 1 rank, 1: 2 rank */
288 	DDR_RANK_CNT_MASK	= 1,
289 	DDR_RANK_CNT_SHIFT	= 11,
290 
291 	/*
292 	 * 00: 9col
293 	 * 01: 10col
294 	 * 10: 11col
295 	 * 11: 12col
296 	 */
297 	DDR_COL_MASK		= 3,
298 	DDR_COL_SHIFT		= 9,
299 
300 	/* 0: 8 bank, 1: 4 bank*/
301 	DDR_BANK_MASK		= 1,
302 	DDR_BANK_SHIFT		= 8,
303 
304 	/*
305 	 * 00: 13 row
306 	 * 01: 14 row
307 	 * 10: 15 row
308 	 * 11: 16 row
309 	 */
310 	DDR_CS0_ROW_MASK	= 3,
311 	DDR_CS0_ROW_SHIFT	= 6,
312 	DDR_CS1_ROW_MASK	= 3,
313 	DDR_CS1_ROW_SHIFT	= 4,
314 
315 	/*
316 	 * 00: 32 bit
317 	 * 01: 16 bit
318 	 * 10: 8 bit
319 	 * rk3036 only support 16bit
320 	 */
321 	DDR_BW_MASK		= 3,
322 	DDR_BW_SHIFT		= 2,
323 	DDR_DIE_BW_MASK		= 3,
324 	DDR_DIE_BW_SHIFT	= 0,
325 };
326 
327 static void rkdclk_init(struct rk3036_sdram_priv *priv)
328 {
329 	struct rk3036_pll *pll = &priv->cru->pll[1];
330 
331 	/* pll enter slow-mode */
332 	rk_clrsetreg(&priv->cru->cru_mode_con, DPLL_MODE_MASK,
333 		     DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
334 
335 	/* use integer mode */
336 	rk_setreg(&pll->con1, 1 << PLL_DSMPD_SHIFT);
337 
338 	rk_clrsetreg(&pll->con0,
339 		     PLL_POSTDIV1_MASK | PLL_FBDIV_MASK,
340 		     (dpll_init_cfg.postdiv1 << PLL_POSTDIV1_SHIFT) |
341 			dpll_init_cfg.fbdiv);
342 	rk_clrsetreg(&pll->con1, PLL_POSTDIV2_MASK | PLL_REFDIV_MASK,
343 		     (dpll_init_cfg.postdiv2 << PLL_POSTDIV2_SHIFT |
344 		      dpll_init_cfg.refdiv << PLL_REFDIV_SHIFT));
345 
346 	/* waiting for pll lock */
347 	while (readl(&pll->con1) & (1 << PLL_LOCK_STATUS_SHIFT))
348 		rockchip_udelay(1);
349 
350 	/* PLL enter normal-mode */
351 	rk_clrsetreg(&priv->cru->cru_mode_con, DPLL_MODE_MASK,
352 		     DPLL_MODE_NORM << DPLL_MODE_SHIFT);
353 }
354 
355 static void copy_to_reg(u32 *dest, const u32 *src, u32 n)
356 {
357 	int i;
358 
359 	for (i = 0; i < n / sizeof(u32); i++) {
360 		writel(*src, dest);
361 		src++;
362 		dest++;
363 	}
364 }
365 
366 void phy_pctrl_reset(struct rk3036_sdram_priv *priv)
367 {
368 	struct rk3036_ddr_phy *ddr_phy = priv->phy;
369 
370 	rk_clrsetreg(&priv->cru->cru_softrst_con[5], 1 << DDRCTRL_PSRST_SHIFT |
371 			1 << DDRCTRL_SRST_SHIFT | 1 << DDRPHY_PSRST_SHIFT |
372 			1 << DDRPHY_SRST_SHIFT,
373 			1 << DDRCTRL_PSRST_SHIFT | 1 << DDRCTRL_SRST_SHIFT |
374 			1 << DDRPHY_PSRST_SHIFT | 1 << DDRPHY_SRST_SHIFT);
375 
376 	rockchip_udelay(10);
377 
378 	rk_clrreg(&priv->cru->cru_softrst_con[5], 1 << DDRPHY_PSRST_SHIFT |
379 						  1 << DDRPHY_SRST_SHIFT);
380 	rockchip_udelay(10);
381 
382 	rk_clrreg(&priv->cru->cru_softrst_con[5], 1 << DDRCTRL_PSRST_SHIFT |
383 						  1 << DDRCTRL_SRST_SHIFT);
384 	rockchip_udelay(10);
385 
386 	clrsetbits_le32(&ddr_phy->ddrphy_reg1,
387 			SOFT_RESET_MASK << SOFT_RESET_SHIFT,
388 			0 << SOFT_RESET_SHIFT);
389 	rockchip_udelay(10);
390 	clrsetbits_le32(&ddr_phy->ddrphy_reg1,
391 			SOFT_RESET_MASK << SOFT_RESET_SHIFT,
392 			3 << SOFT_RESET_SHIFT);
393 
394 	rockchip_udelay(1);
395 }
396 
397 void phy_dll_bypass_set(struct rk3036_sdram_priv *priv, unsigned int freq)
398 {
399 	struct rk3036_ddr_phy *ddr_phy = priv->phy;
400 
401 	if (freq < ddr_timing.freq) {
402 		writel(CMD_DLL_BYPASS | HIGH_8BIT_DLL_BYPASS |
403 			LOW_8BIT_DLL_BYPASS, &ddr_phy->ddrphy_reg2a);
404 
405 		writel(LEFT_CHN_TX_DQ_PHASE_BYPASS_90 |
406 			LEFT_CHN_TX_DQ_DLL_ENABLE |
407 			(0 & LEFT_CHN_TX_DQ_DLL_DELAY_MASK) <<
408 			 LEFT_CHN_TX_DQ_DLL_DELAY_SHIFT, &ddr_phy->ddrphy_reg6);
409 
410 		writel(RIGHT_CHN_TX_DQ_PHASE_BYPASS_90 |
411 			RIGHT_CHN_TX_DQ_DLL_ENABLE |
412 			(0 & RIGHT_CHN_TX_DQ_DLL_DELAY_MASK) <<
413 			 RIGHT_CHN_TX_DQ_DLL_DELAY_SHIFT,
414 			&ddr_phy->ddrphy_reg9);
415 	} else {
416 		writel(CMD_DLL_BYPASS_DISABLE | HIGH_8BIT_DLL_BYPASS_DISABLE |
417 			LOW_8BIT_DLL_BYPASS_DISABLE, &ddr_phy->ddrphy_reg2a);
418 
419 		writel(LEFT_CHN_TX_DQ_PHASE_BYPASS_0 |
420 			LEFT_CHN_TX_DQ_DLL_ENABLE |
421 			(4 & LEFT_CHN_TX_DQ_DLL_DELAY_MASK) <<
422 			 LEFT_CHN_TX_DQ_DLL_DELAY_SHIFT,
423 			&ddr_phy->ddrphy_reg6);
424 
425 		writel(RIGHT_CHN_TX_DQ_PHASE_BYPASS_0 |
426 			RIGHT_CHN_TX_DQ_DLL_ENABLE |
427 			(4 & RIGHT_CHN_TX_DQ_DLL_DELAY_MASK) <<
428 			 RIGHT_CHN_TX_DQ_DLL_DELAY_SHIFT,
429 			&ddr_phy->ddrphy_reg9);
430 	}
431 
432 	writel(CMD_SLAVE_DLL_NO_INVERSE_MODE | CMD_SLAVE_DLL_ENALBE |
433 			(0 & CMD_TX_SLAVE_DLL_DELAY_MASK) <<
434 			CMD_TX_SLAVE_DLL_DELAY_SHIFT, &ddr_phy->ddrphy_reg19);
435 
436 	/* 45 degree delay */
437 	writel((DQS_DLL_45_DELAY & LEFT_CHN_RX_DQS_DELAY_TAP_MASK) <<
438 		LEFT_CHN_RX_DQS_DELAY_TAP_SHIFT, &ddr_phy->ddrphy_reg8);
439 	writel((DQS_DLL_45_DELAY & RIGHT_CHN_RX_DQS_DELAY_TAP_MASK) <<
440 		RIGHT_CHN_RX_DQS_DELAY_TAP_SHIFT, &ddr_phy->ddrphy_reg11);
441 }
442 
443 static void send_command(struct rk3036_ddr_pctl *pctl,
444 			 u32 rank, u32 cmd, u32 arg)
445 {
446 	writel((START_CMD | (rank << 20) | arg | cmd), &pctl->mcmd);
447 	rockchip_udelay(1);
448 	while (readl(&pctl->mcmd) & START_CMD)
449 		;
450 }
451 
452 static void memory_init(struct rk3036_sdram_priv *priv)
453 {
454 	struct rk3036_ddr_pctl *pctl = priv->pctl;
455 
456 	send_command(pctl, 3, DESELECT_CMD, 0);
457 	rockchip_udelay(1);
458 	send_command(pctl, 3, PREA_CMD, 0);
459 	send_command(pctl, 3, MRS_CMD,
460 		     (0x02 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
461 		     (ddr_timing.phy_timing.mr[2] & CMD_ADDR_MASK) <<
462 		     CMD_ADDR_SHIFT);
463 
464 	send_command(pctl, 3, MRS_CMD,
465 		     (0x03 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
466 		     (ddr_timing.phy_timing.mr[3] & CMD_ADDR_MASK) <<
467 		     CMD_ADDR_SHIFT);
468 
469 	send_command(pctl, 3, MRS_CMD,
470 		     (0x01 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
471 		     (ddr_timing.phy_timing.mr[1] & CMD_ADDR_MASK) <<
472 		     CMD_ADDR_SHIFT);
473 
474 	send_command(pctl, 3, MRS_CMD,
475 		     (0x00 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
476 		     (ddr_timing.phy_timing.mr[0] & CMD_ADDR_MASK) <<
477 		     CMD_ADDR_SHIFT | DDR3_DLL_RESET);
478 
479 	send_command(pctl, 3, ZQCL_CMD, 0);
480 }
481 
482 static void data_training(struct rk3036_sdram_priv *priv)
483 {
484 	struct rk3036_ddr_phy *ddr_phy = priv->phy;
485 	struct rk3036_ddr_pctl *pctl = priv->pctl;
486 	u32 value;
487 
488 	/* disable auto refresh */
489 	value = readl(&pctl->trefi),
490 	writel(0, &pctl->trefi);
491 
492 	clrsetbits_le32(&ddr_phy->ddrphy_reg2, 0x03,
493 			DQS_SQU_CAL_NORMAL_MODE | DQS_SQU_CAL_START);
494 
495 	rockchip_udelay(1);
496 	while ((readl(&ddr_phy->ddrphy_reg62) & CAL_DONE_MASK) !=
497 		(HIGH_8BIT_CAL_DONE | LOW_8BIT_CAL_DONE)) {
498 		;
499 	}
500 
501 	clrsetbits_le32(&ddr_phy->ddrphy_reg2, 0x03,
502 			DQS_SQU_CAL_NORMAL_MODE | DQS_SQU_NO_CAL);
503 
504 	/*
505 	 * since data training will take about 20us, so send some auto
506 	 * refresh(about 7.8us) to complement the lost time
507 	 */
508 	send_command(pctl, 3, REF_CMD, 0);
509 	send_command(pctl, 3, REF_CMD, 0);
510 	send_command(pctl, 3, REF_CMD, 0);
511 
512 	writel(value, &pctl->trefi);
513 }
514 
515 static void move_to_config_state(struct rk3036_sdram_priv *priv)
516 {
517 	unsigned int state;
518 	struct rk3036_ddr_pctl *pctl = priv->pctl;
519 
520 	while (1) {
521 		state = readl(&pctl->stat) & PCTL_STAT_MASK;
522 		switch (state) {
523 		case LOW_POWER:
524 			writel(WAKEUP_STATE, &pctl->sctl);
525 			while ((readl(&pctl->stat) & PCTL_STAT_MASK)
526 				!= ACCESS)
527 				;
528 			/*
529 			 * If at low power state, need wakeup first, and then
530 			 * enter the config, so fallthrough
531 			 */
532 		case ACCESS:
533 			/* fallthrough */
534 		case INIT_MEM:
535 			writel(CFG_STATE, &pctl->sctl);
536 			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != CONFIG)
537 				;
538 			break;
539 		case CONFIG:
540 			return;
541 		default:
542 			break;
543 		}
544 	}
545 }
546 
547 static void move_to_access_state(struct rk3036_sdram_priv *priv)
548 {
549 	unsigned int state;
550 	struct rk3036_ddr_pctl *pctl = priv->pctl;
551 
552 	while (1) {
553 		state = readl(&pctl->stat) & PCTL_STAT_MASK;
554 		switch (state) {
555 		case LOW_POWER:
556 			writel(WAKEUP_STATE, &pctl->sctl);
557 			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS)
558 				;
559 			break;
560 		case INIT_MEM:
561 			writel(CFG_STATE, &pctl->sctl);
562 			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != CONFIG)
563 				;
564 			/* fallthrough */
565 		case CONFIG:
566 			writel(GO_STATE, &pctl->sctl);
567 			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS)
568 				;
569 			break;
570 		case ACCESS:
571 			return;
572 		default:
573 			break;
574 		}
575 	}
576 }
577 
578 static void pctl_cfg(struct rk3036_sdram_priv *priv)
579 {
580 	struct rk3036_ddr_pctl *pctl = priv->pctl;
581 	u32 burst_len;
582 	u32 reg;
583 
584 	writel(DFI_INIT_START | DFI_DATA_BYTE_DISABLE_EN, &pctl->dfistcfg0);
585 	writel(DFI_DRAM_CLK_SR_EN | DFI_DRAM_CLK_DPD_EN, &pctl->dfistcfg1);
586 	writel(DFI_PARITY_INTR_EN | DFI_PARITY_EN, &pctl->dfistcfg2);
587 	writel(7 << TLP_RESP_TIME_SHIFT | LP_SR_EN | LP_PD_EN,
588 	       &pctl->dfilpcfg0);
589 
590 	writel(1, &pctl->dfitphyupdtype0);
591 	writel(0x0d, &pctl->dfitphyrdlat);
592 
593 	/* cs0 and cs1 write odt enable */
594 	writel((RANK0_ODT_WRITE_SEL | RANK1_ODT_WRITE_SEL),
595 	       &pctl->dfiodtcfg);
596 
597 	/* odt write length */
598 	writel(7 << ODT_LEN_BL8_W_SHIFT, &pctl->dfiodtcfg1);
599 
600 	/* phyupd and ctrlupd disabled */
601 	writel(0, &pctl->dfiupdcfg);
602 
603 	if ((ddr_timing.noc_timing.burstlen << 1) == 4)
604 		burst_len = MEM_BL4;
605 	else
606 		burst_len = MEM_BL8;
607 
608 	copy_to_reg(&pctl->togcnt1u, &ddr_timing.pctl_timing.togcnt1u,
609 		    sizeof(struct rk3036_pctl_timing));
610 	reg = readl(&pctl->tcl);
611 	writel(reg - 3, &pctl->dfitrddataen);
612 	reg = readl(&pctl->tcwl);
613 	writel(reg - 1, &pctl->dfitphywrlat);
614 
615 	writel(burst_len | (1 & TFAW_CFG_MASK) << TFAW_CFG_SHIFT |
616 			PD_EXIT_SLOW_MODE | PD_ACTIVE_POWER_DOWN |
617 			(0 & PD_IDLE_MASK) << PD_IDLE_SHIFT,
618 			&pctl->mcfg);
619 
620 	writel(RK_SETBITS(MSCH4_MAINDDR3), &priv->grf->soc_con2);
621 	setbits_le32(&pctl->scfg, HW_LOW_POWER_EN);
622 }
623 
624 static void phy_cfg(struct rk3036_sdram_priv *priv)
625 {
626 	struct rk3036_ddr_phy *ddr_phy = priv->phy;
627 	struct rk3036_service_sys *axi_bus = priv->axi_bus;
628 
629 	writel(ddr_timing.noc_timing.noc_timing, &axi_bus->ddrtiming);
630 	writel(0x3f, &axi_bus->readlatency);
631 
632 	writel(MEMORY_SELECT_DDR3 | DQS_SQU_CAL_NORMAL_MODE,
633 	       &ddr_phy->ddrphy_reg2);
634 
635 	clrsetbits_le32(&ddr_phy->ddrphy_reg3, 1, ddr_timing.phy_timing.bl);
636 	writel(ddr_timing.phy_timing.cl_al, &ddr_phy->ddrphy_reg4a);
637 	writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg16);
638 	writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg22);
639 	writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg25);
640 	writel(PHY_DRV_ODT_SET(PHY_RON_44OHM), &ddr_phy->ddrphy_reg26);
641 	writel(PHY_DRV_ODT_SET(PHY_RTT_216OHM), &ddr_phy->ddrphy_reg27);
642 	writel(PHY_DRV_ODT_SET(PHY_RTT_216OHM), &ddr_phy->ddrphy_reg28);
643 }
644 
645 void dram_cfg_rbc(struct rk3036_sdram_priv *priv)
646 {
647 	char noc_config;
648 	int i = 0;
649 	struct rk3036_ddr_config config = priv->ddr_config;
650 	struct rk3036_service_sys *axi_bus = priv->axi_bus;
651 
652 	move_to_config_state(priv);
653 
654 	/* 2bit in BIT1, 2 */
655 	if (config.rank == 2) {
656 		noc_config = (config.cs0_row - 13) << 4 | config.bank << 1 |
657 			      1 << 3 | (config.col - 10);
658 		if (noc_config == ddr_cfg_2_rbc[9]) {
659 			i = 9;
660 			goto finish;
661 		} else if (noc_config == ddr_cfg_2_rbc[10]) {
662 			i = 10;
663 			goto finish;
664 		}
665 	}
666 
667 	noc_config = (config.cs0_row - 13) << 4 | config.bank << 1 |
668 			(config.col - 10);
669 
670 	for (i = 0; i < sizeof(ddr_cfg_2_rbc); i++) {
671 		if (noc_config == ddr_cfg_2_rbc[i])
672 			goto finish;
673 	}
674 
675 	/* bank: 1 bit in BIT6,7, 1bit in BIT1, 2 */
676 	noc_config = 1 << 6 | (config.cs0_row - 13) << 4 |
677 			2 << 1 | (config.col - 10);
678 	if (noc_config == ddr_cfg_2_rbc[11]) {
679 		i = 11;
680 		goto finish;
681 	}
682 
683 	/* bank: 2bit in BIT6,7 */
684 	noc_config = (config.bank << 6) | (config.cs0_row - 13) << 4 |
685 			(config.col - 10);
686 
687 	if (noc_config == ddr_cfg_2_rbc[0])
688 		i = 0;
689 	else if (noc_config == ddr_cfg_2_rbc[12])
690 		i = 12;
691 	else if (noc_config == ddr_cfg_2_rbc[13])
692 		i = 13;
693 finish:
694 	writel(i, &axi_bus->ddrconf);
695 	move_to_access_state(priv);
696 }
697 
698 static void sdram_all_config(struct rk3036_sdram_priv *priv)
699 {
700 	u32 os_reg = 0;
701 	u32 cs1_row = 0;
702 	struct rk3036_ddr_config config = priv->ddr_config;
703 
704 	if (config.rank > 1)
705 		cs1_row = config.cs1_row - 13;
706 
707 	os_reg = config.ddr_type << DDR_TYPE_SHIFT |
708 			0 << DDR_CHN_CNT_SHIFT |
709 			(config.rank - 1) << DDR_RANK_CNT_SHIFT |
710 			(config.col - 9) << DDR_COL_SHIFT |
711 			(config.bank == 3 ? 0 : 1) << DDR_BANK_SHIFT |
712 			(config.cs0_row - 13) << DDR_CS0_ROW_SHIFT |
713 			cs1_row << DDR_CS1_ROW_SHIFT |
714 			1 << DDR_BW_SHIFT |
715 			(2 >> config.bw) << DDR_DIE_BW_SHIFT;
716 	writel(os_reg, &priv->grf->os_reg[1]);
717 }
718 
719 size_t sdram_size(void)
720 {
721 	u32 size, os_reg, cs0_row, cs1_row, col, bank, rank;
722 	struct rk3036_grf *grf = (void *)GRF_BASE;
723 
724 	os_reg = readl(&grf->os_reg[1]);
725 
726 	cs0_row = 13 + ((os_reg >> DDR_CS0_ROW_SHIFT) & DDR_CS0_ROW_MASK);
727 	cs1_row = 13 + ((os_reg >> DDR_CS1_ROW_SHIFT) & DDR_CS1_ROW_MASK);
728 	col = 9 + ((os_reg >> DDR_COL_SHIFT) & DDR_COL_MASK);
729 	bank = 3 - ((os_reg >> DDR_BANK_SHIFT) & DDR_BANK_MASK);
730 	rank = 1 + ((os_reg >> DDR_RANK_CNT_SHIFT) & DDR_RANK_CNT_MASK);
731 
732 	/* row + col + bank + bw(rk3036 only support 16bit, so fix in 1) */
733 	size = 1 << (cs0_row + col + bank + 1);
734 
735 	if (rank > 1)
736 		size += size >> (cs0_row - cs1_row);
737 
738 	return size;
739 }
740 
741 void sdram_init(void)
742 {
743 	struct rk3036_sdram_priv sdram_priv;
744 
745 	sdram_priv.cru = (void *)CRU_BASE;
746 	sdram_priv.grf = (void *)GRF_BASE;
747 	sdram_priv.phy = (void *)DDR_PHY_BASE;
748 	sdram_priv.pctl = (void *)DDR_PCTL_BASE;
749 	sdram_priv.axi_bus = (void *)CPU_AXI_BUS_BASE;
750 
751 	get_ddr_config(&sdram_priv.ddr_config);
752 	sdram_all_config(&sdram_priv);
753 	rkdclk_init(&sdram_priv);
754 	phy_pctrl_reset(&sdram_priv);
755 	phy_dll_bypass_set(&sdram_priv, ddr_timing.freq);
756 	pctl_cfg(&sdram_priv);
757 	phy_cfg(&sdram_priv);
758 	writel(POWER_UP_START, &sdram_priv.pctl->powctl);
759 	while (!(readl(&sdram_priv.pctl->powstat) & POWER_UP_DONE))
760 		;
761 	memory_init(&sdram_priv);
762 	move_to_config_state(&sdram_priv);
763 	data_training(&sdram_priv);
764 	move_to_access_state(&sdram_priv);
765 	dram_cfg_rbc(&sdram_priv);
766 }
767