]>
Commit | Line | Data |
---|---|---|
83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
9ffa7a35 PCM |
2 | /* |
3 | * (c) 2015 Paul Thacker <paul.thacker@microchip.com> | |
4 | * | |
9ffa7a35 | 5 | */ |
d678a59d | 6 | #include <common.h> |
9ffa7a35 PCM |
7 | #include <wait_bit.h> |
8 | #include <linux/kernel.h> | |
9 | #include <linux/bitops.h> | |
10 | #include <mach/pic32.h> | |
11 | #include <mach/ddr.h> | |
12 | ||
13 | #include "ddr2_regs.h" | |
14 | #include "ddr2_timing.h" | |
15 | ||
16 | /* init DDR2 Phy */ | |
17 | void ddr2_phy_init(void) | |
18 | { | |
19 | struct ddr2_phy_regs *ddr2_phy; | |
20 | u32 pad_ctl; | |
21 | ||
22 | ddr2_phy = ioremap(PIC32_DDR2P_BASE, sizeof(*ddr2_phy)); | |
23 | ||
24 | /* PHY_DLL_RECALIB */ | |
25 | writel(DELAY_START_VAL(3) | DISABLE_RECALIB(0) | | |
26 | RECALIB_CNT(0x10), &ddr2_phy->dll_recalib); | |
27 | ||
28 | /* PHY_PAD_CTRL */ | |
29 | pad_ctl = ODT_SEL | ODT_EN | DRIVE_SEL(0) | | |
30 | ODT_PULLDOWN(2) | ODT_PULLUP(3) | | |
31 | EXTRA_OEN_CLK(0) | NOEXT_DLL | | |
32 | DLR_DFT_WRCMD | HALF_RATE | | |
33 | DRVSTR_PFET(0xe) | DRVSTR_NFET(0xe) | | |
34 | RCVR_EN | PREAMBLE_DLY(2); | |
35 | writel(pad_ctl, &ddr2_phy->pad_ctrl); | |
36 | ||
37 | /* SCL_CONFIG_0 */ | |
38 | writel(SCL_BURST8 | SCL_DDR_CONNECTED | SCL_RCAS_LAT(RL) | | |
39 | SCL_ODTCSWW, &ddr2_phy->scl_config_1); | |
40 | ||
41 | /* SCL_CONFIG_1 */ | |
42 | writel(SCL_CSEN | SCL_WCAS_LAT(WL), &ddr2_phy->scl_config_2); | |
43 | ||
44 | /* SCL_LAT */ | |
45 | writel(SCL_CAPCLKDLY(3) | SCL_DDRCLKDLY(4), &ddr2_phy->scl_latency); | |
46 | } | |
47 | ||
48 | /* start phy self calibration logic */ | |
49 | static int ddr2_phy_calib_start(void) | |
50 | { | |
51 | struct ddr2_phy_regs *ddr2_phy; | |
52 | ||
53 | ddr2_phy = ioremap(PIC32_DDR2P_BASE, sizeof(*ddr2_phy)); | |
54 | ||
55 | /* DDR Phy SCL Start */ | |
56 | writel(SCL_START | SCL_EN, &ddr2_phy->scl_start); | |
57 | ||
58 | /* Wait for SCL for data byte to pass */ | |
48263504 ÁFR |
59 | return wait_for_bit_le32(&ddr2_phy->scl_start, SCL_LUBPASS, |
60 | true, CONFIG_SYS_HZ, false); | |
9ffa7a35 PCM |
61 | } |
62 | ||
63 | /* DDR2 Controller initialization */ | |
64 | ||
65 | /* Target Agent Arbiter */ | |
66 | static void ddr_set_arbiter(struct ddr2_ctrl_regs *ctrl, | |
67 | const struct ddr2_arbiter_params *const param) | |
68 | { | |
69 | int i; | |
70 | ||
71 | for (i = 0; i < NUM_AGENTS; i++) { | |
72 | /* set min burst size */ | |
73 | writel(i * MIN_LIM_WIDTH, &ctrl->tsel); | |
74 | writel(param->min_limit, &ctrl->minlim); | |
75 | ||
76 | /* set request period (4 * req_period clocks) */ | |
77 | writel(i * RQST_PERIOD_WIDTH, &ctrl->tsel); | |
78 | writel(param->req_period, &ctrl->reqprd); | |
79 | ||
80 | /* set number of burst accepted */ | |
81 | writel(i * MIN_CMDACPT_WIDTH, &ctrl->tsel); | |
82 | writel(param->min_cmd_acpt, &ctrl->mincmd); | |
83 | } | |
84 | } | |
85 | ||
86 | const struct ddr2_arbiter_params *__weak board_get_ddr_arbiter_params(void) | |
87 | { | |
88 | /* default arbiter parameters */ | |
89 | static const struct ddr2_arbiter_params arb_params[] = { | |
90 | { .min_limit = 0x1f, .req_period = 0xff, .min_cmd_acpt = 0x04,}, | |
91 | { .min_limit = 0x1f, .req_period = 0xff, .min_cmd_acpt = 0x10,}, | |
92 | { .min_limit = 0x1f, .req_period = 0xff, .min_cmd_acpt = 0x10,}, | |
93 | { .min_limit = 0x04, .req_period = 0xff, .min_cmd_acpt = 0x04,}, | |
94 | { .min_limit = 0x04, .req_period = 0xff, .min_cmd_acpt = 0x04,}, | |
95 | }; | |
96 | ||
97 | return &arb_params[0]; | |
98 | } | |
99 | ||
100 | static void host_load_cmd(struct ddr2_ctrl_regs *ctrl, u32 cmd_idx, | |
101 | u32 hostcmd2, u32 hostcmd1, u32 delay) | |
102 | { | |
103 | u32 hc_delay; | |
104 | ||
105 | hc_delay = max_t(u32, DIV_ROUND_UP(delay, T_CK), 2) - 2; | |
106 | writel(hostcmd1, &ctrl->cmd10[cmd_idx]); | |
107 | writel((hostcmd2 & 0x7ff) | (hc_delay << 11), &ctrl->cmd20[cmd_idx]); | |
108 | } | |
109 | ||
110 | /* init DDR2 Controller */ | |
111 | void ddr2_ctrl_init(void) | |
112 | { | |
113 | u32 wr2prech, rd2prech, wr2rd, wr2rd_cs; | |
114 | u32 ras2ras, ras2cas, prech2ras, temp; | |
115 | const struct ddr2_arbiter_params *arb_params; | |
116 | struct ddr2_ctrl_regs *ctrl; | |
117 | ||
118 | ctrl = ioremap(PIC32_DDR2C_BASE, sizeof(*ctrl)); | |
119 | ||
120 | /* PIC32 DDR2 controller always work in HALF_RATE */ | |
121 | writel(HALF_RATE_MODE, &ctrl->memwidth); | |
122 | ||
123 | /* Set arbiter configuration per target */ | |
124 | arb_params = board_get_ddr_arbiter_params(); | |
125 | ddr_set_arbiter(ctrl, arb_params); | |
126 | ||
127 | /* Address Configuration, model {CS, ROW, BA, COL} */ | |
128 | writel((ROW_ADDR_RSHIFT | (BA_RSHFT << 8) | (CS_ADDR_RSHIFT << 16) | | |
129 | (COL_HI_RSHFT << 24) | (SB_PRI << 29) | | |
130 | (EN_AUTO_PRECH << 30)), &ctrl->memcfg0); | |
131 | ||
132 | writel(ROW_ADDR_MASK, &ctrl->memcfg1); | |
133 | writel(COL_HI_MASK, &ctrl->memcfg2); | |
134 | writel(COL_LO_MASK, &ctrl->memcfg3); | |
135 | writel(BA_MASK | (CS_ADDR_MASK << 8), &ctrl->memcfg4); | |
136 | ||
137 | /* Refresh Config */ | |
138 | writel(REFCNT_CLK(DIV_ROUND_UP(T_RFI, T_CK_CTRL) - 2) | | |
139 | REFDLY_CLK(DIV_ROUND_UP(T_RFC_MIN, T_CK_CTRL) - 2) | | |
140 | MAX_PEND_REF(7), | |
141 | &ctrl->refcfg); | |
142 | ||
143 | /* Power Config */ | |
144 | writel(ECC_EN(0) | ERR_CORR_EN(0) | EN_AUTO_PWR_DN(0) | | |
145 | EN_AUTO_SELF_REF(3) | PWR_DN_DLY(8) | | |
146 | SELF_REF_DLY(17) | PRECH_PWR_DN_ONLY(0), | |
147 | &ctrl->pwrcfg); | |
148 | ||
149 | /* Delay Config */ | |
150 | wr2rd = max_t(u32, DIV_ROUND_UP(T_WTR, T_CK_CTRL), | |
151 | DIV_ROUND_UP(T_WTR_TCK, 2)) + WL + BL; | |
152 | wr2rd_cs = max_t(u32, wr2rd - 1, 3); | |
153 | wr2prech = DIV_ROUND_UP(T_WR, T_CK_CTRL) + WL + BL; | |
154 | rd2prech = max_t(u32, DIV_ROUND_UP(T_RTP, T_CK_CTRL), | |
155 | DIV_ROUND_UP(T_RTP_TCK, 2)) + BL - 2; | |
156 | ras2ras = max_t(u32, DIV_ROUND_UP(T_RRD, T_CK_CTRL), | |
157 | DIV_ROUND_UP(T_RRD_TCK, 2)) - 1; | |
158 | ras2cas = DIV_ROUND_UP(T_RCD, T_CK_CTRL) - 1; | |
159 | prech2ras = DIV_ROUND_UP(T_RP, T_CK_CTRL) - 1; | |
160 | ||
161 | writel(((wr2rd & 0x0f) | | |
162 | ((wr2rd_cs & 0x0f) << 4) | | |
163 | ((BL - 1) << 8) | | |
164 | (BL << 12) | | |
165 | ((BL - 1) << 16) | | |
166 | ((BL - 1) << 20) | | |
167 | ((BL + 2) << 24) | | |
168 | ((RL - WL + 3) << 28)), &ctrl->dlycfg0); | |
169 | ||
170 | writel(((T_CKE_TCK - 1) | | |
171 | (((DIV_ROUND_UP(T_DLLK, 2) - 2) & 0xff) << 8) | | |
172 | ((T_CKE_TCK - 1) << 16) | | |
173 | ((max_t(u32, T_XP_TCK, T_CKE_TCK) - 1) << 20) | | |
174 | ((wr2prech >> 4) << 26) | | |
175 | ((wr2rd >> 4) << 27) | | |
176 | ((wr2rd_cs >> 4) << 28) | | |
177 | (((RL + 5) >> 4) << 29) | | |
178 | ((DIV_ROUND_UP(T_DLLK, 2) >> 8) << 30)), &ctrl->dlycfg1); | |
179 | ||
180 | writel((DIV_ROUND_UP(T_RP, T_CK_CTRL) | | |
181 | (rd2prech << 8) | | |
182 | ((wr2prech & 0x0f) << 12) | | |
183 | (ras2ras << 16) | | |
184 | (ras2cas << 20) | | |
185 | (prech2ras << 24) | | |
186 | ((RL + 3) << 28)), &ctrl->dlycfg2); | |
187 | ||
188 | writel(((DIV_ROUND_UP(T_RAS_MIN, T_CK_CTRL) - 1) | | |
189 | ((DIV_ROUND_UP(T_RC, T_CK_CTRL) - 1) << 8) | | |
190 | ((DIV_ROUND_UP(T_FAW, T_CK_CTRL) - 1) << 16)), | |
191 | &ctrl->dlycfg3); | |
192 | ||
193 | /* ODT Config */ | |
194 | writel(0x0, &ctrl->odtcfg); | |
195 | writel(BIT(16), &ctrl->odtencfg); | |
196 | writel(ODTRDLY(RL - 3) | ODTWDLY(WL - 3) | ODTRLEN(2) | ODTWLEN(3), | |
197 | &ctrl->odtcfg); | |
198 | ||
199 | /* Transfer Configuration */ | |
200 | writel(NXTDATRQDLY(2) | NXDATAVDLY(4) | RDATENDLY(2) | | |
201 | MAX_BURST(3) | (7 << 28) | BIG_ENDIAN(0), | |
202 | &ctrl->xfercfg); | |
203 | ||
204 | /* DRAM Initialization */ | |
205 | /* CKE high after reset and wait 400 nsec */ | |
206 | host_load_cmd(ctrl, 0, 0, IDLE_NOP, 400000); | |
207 | ||
208 | /* issue precharge all command */ | |
209 | host_load_cmd(ctrl, 1, 0x04, PRECH_ALL_CMD, T_RP + T_CK); | |
210 | ||
211 | /* initialize EMR2 */ | |
212 | host_load_cmd(ctrl, 2, 0x200, LOAD_MODE_CMD, T_MRD_TCK * T_CK); | |
213 | ||
214 | /* initialize EMR3 */ | |
215 | host_load_cmd(ctrl, 3, 0x300, LOAD_MODE_CMD, T_MRD_TCK * T_CK); | |
216 | ||
217 | /* | |
218 | * RDQS disable, DQSB enable, OCD exit, 150 ohm termination, | |
219 | * AL=0, DLL enable | |
220 | */ | |
221 | host_load_cmd(ctrl, 4, 0x100, | |
222 | LOAD_MODE_CMD | (0x40 << 24), T_MRD_TCK * T_CK); | |
223 | /* | |
224 | * PD fast exit, WR REC = T_WR in clocks -1, | |
225 | * DLL reset, CAS = RL, burst = 4 | |
226 | */ | |
227 | temp = ((DIV_ROUND_UP(T_WR, T_CK) - 1) << 1) | 1; | |
228 | host_load_cmd(ctrl, 5, temp, LOAD_MODE_CMD | (RL << 28) | (2 << 24), | |
229 | T_MRD_TCK * T_CK); | |
230 | ||
231 | /* issue precharge all command */ | |
232 | host_load_cmd(ctrl, 6, 4, PRECH_ALL_CMD, T_RP + T_CK); | |
233 | ||
234 | /* issue refresh command */ | |
235 | host_load_cmd(ctrl, 7, 0, REF_CMD, T_RFC_MIN); | |
236 | ||
237 | /* issue refresh command */ | |
238 | host_load_cmd(ctrl, 8, 0, REF_CMD, T_RFC_MIN); | |
239 | ||
240 | /* Mode register programming as before without DLL reset */ | |
241 | host_load_cmd(ctrl, 9, temp, LOAD_MODE_CMD | (RL << 28) | (3 << 24), | |
242 | T_MRD_TCK * T_CK); | |
243 | ||
244 | /* extended mode register same as before with OCD default */ | |
245 | host_load_cmd(ctrl, 10, 0x103, LOAD_MODE_CMD | (0xc << 24), | |
246 | T_MRD_TCK * T_CK); | |
247 | ||
248 | /* extended mode register same as before with OCD exit */ | |
249 | host_load_cmd(ctrl, 11, 0x100, LOAD_MODE_CMD | (0x4 << 28), | |
250 | 140 * T_CK); | |
251 | ||
252 | writel(CMD_VALID | NUMHOSTCMD(11), &ctrl->cmdissue); | |
253 | ||
254 | /* start memory initialization */ | |
255 | writel(INIT_START, &ctrl->memcon); | |
256 | ||
257 | /* wait for all host cmds to be transmitted */ | |
48263504 ÁFR |
258 | wait_for_bit_le32(&ctrl->cmdissue, CMD_VALID, false, |
259 | CONFIG_SYS_HZ, false); | |
9ffa7a35 PCM |
260 | |
261 | /* inform all cmds issued, ready for normal operation */ | |
262 | writel(INIT_START | INIT_DONE, &ctrl->memcon); | |
263 | ||
264 | /* perform phy caliberation */ | |
265 | if (ddr2_phy_calib_start()) | |
266 | printf("ddr2: phy calib failed\n"); | |
267 | } | |
268 | ||
269 | phys_size_t ddr2_calculate_size(void) | |
270 | { | |
271 | u32 temp; | |
272 | ||
273 | temp = 1 << (COL_BITS + BA_BITS + ROW_BITS); | |
274 | /* 16-bit data width between controller and DIMM */ | |
275 | temp = temp * CS_BITS * (16 / 8); | |
276 | return (phys_size_t)temp; | |
277 | } |