1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * (C) Copyright 2020 SiFive, Inc.
6 * Pragnesh Patel <pragnesh.patel@sifive.com>
19 #include <linux/bitops.h>
21 #define DENALI_CTL_0 0
22 #define DENALI_CTL_21 21
23 #define DENALI_CTL_120 120
24 #define DENALI_CTL_132 132
25 #define DENALI_CTL_136 136
26 #define DENALI_CTL_170 170
27 #define DENALI_CTL_181 181
28 #define DENALI_CTL_182 182
29 #define DENALI_CTL_184 184
30 #define DENALI_CTL_208 208
31 #define DENALI_CTL_209 209
32 #define DENALI_CTL_210 210
33 #define DENALI_CTL_212 212
34 #define DENALI_CTL_214 214
35 #define DENALI_CTL_216 216
36 #define DENALI_CTL_224 224
37 #define DENALI_CTL_225 225
38 #define DENALI_CTL_260 260
40 #define DENALI_PHY_1152 1152
41 #define DENALI_PHY_1214 1214
43 #define DRAM_CLASS_OFFSET 8
44 #define DRAM_CLASS_DDR4 0xA
45 #define OPTIMAL_RMODW_EN_OFFSET 0
46 #define DISABLE_RD_INTERLEAVE_OFFSET 16
47 #define OUT_OF_RANGE_OFFSET 1
48 #define MULTIPLE_OUT_OF_RANGE_OFFSET 2
49 #define PORT_COMMAND_CHANNEL_ERROR_OFFSET 7
50 #define MC_INIT_COMPLETE_OFFSET 8
51 #define LEVELING_OPERATION_COMPLETED_OFFSET 22
52 #define DFI_PHY_WRLELV_MODE_OFFSET 24
53 #define DFI_PHY_RDLVL_MODE_OFFSET 24
54 #define DFI_PHY_RDLVL_GATE_MODE_OFFSET 0
55 #define VREF_EN_OFFSET 24
56 #define PORT_ADDR_PROTECTION_EN_OFFSET 0
57 #define AXI0_ADDRESS_RANGE_ENABLE 8
58 #define AXI0_RANGE_PROT_BITS_0_OFFSET 24
59 #define RDLVL_EN_OFFSET 16
60 #define RDLVL_GATE_EN_OFFSET 24
61 #define WRLVL_EN_OFFSET 0
63 #define PHY_RX_CAL_DQ0_0_OFFSET 0
64 #define PHY_RX_CAL_DQ1_0_OFFSET 16
66 DECLARE_GLOBAL_DATA_PTR;
69 volatile u32 denali_ctl[265];
73 volatile u32 denali_phy[1215];
77 * struct fu540_ddr_info
79 * @dev : pointer for the device
80 * @info : UCLASS RAM information
81 * @ctl : DDR controller base address
82 * @phy : DDR PHY base address
83 * @ctrl : DDR control base address
84 * @physical_filter_ctrl : DDR physical filter control base address
86 struct fu540_ddr_info {
89 struct fu540_ddrctl *ctl;
90 struct fu540_ddrphy *phy;
92 u32 *physical_filter_ctrl;
95 #if defined(CONFIG_SPL_BUILD)
96 struct fu540_ddr_params {
97 struct fu540_ddrctl pctl_regs;
98 struct fu540_ddrphy phy_regs;
101 struct sifive_dmc_plat {
102 struct fu540_ddr_params ddr_params;
106 * TODO : It can be possible to use common sdram_copy_to_reg() API
109 static void sdram_copy_to_reg(volatile u32 *dest,
110 volatile u32 *src, u32 n)
114 for (i = 0; i < n / sizeof(u32); i++) {
121 static void fu540_ddr_setup_range_protection(volatile u32 *ctl, u64 end_addr)
123 u32 end_addr_16kblocks = ((end_addr >> 14) & 0x7FFFFF) - 1;
125 writel(0x0, DENALI_CTL_209 + ctl);
126 writel(end_addr_16kblocks, DENALI_CTL_210 + ctl);
127 writel(0x0, DENALI_CTL_212 + ctl);
128 writel(0x0, DENALI_CTL_214 + ctl);
129 writel(0x0, DENALI_CTL_216 + ctl);
130 setbits_le32(DENALI_CTL_224 + ctl,
131 0x3 << AXI0_RANGE_PROT_BITS_0_OFFSET);
132 writel(0xFFFFFFFF, DENALI_CTL_225 + ctl);
133 setbits_le32(DENALI_CTL_208 + ctl, 0x1 << AXI0_ADDRESS_RANGE_ENABLE);
134 setbits_le32(DENALI_CTL_208 + ctl,
135 0x1 << PORT_ADDR_PROTECTION_EN_OFFSET);
138 static void fu540_ddr_start(volatile u32 *ctl, u32 *physical_filter_ctrl,
141 volatile u64 *filterreg = (volatile u64 *)physical_filter_ctrl;
143 setbits_le32(DENALI_CTL_0 + ctl, 0x1);
145 wait_for_bit_le32((void *)ctl + DENALI_CTL_132,
146 BIT(MC_INIT_COMPLETE_OFFSET), false, 100, false);
148 /* Disable the BusBlocker in front of the controller AXI slave ports */
149 filterreg[0] = 0x0f00000000000000UL | (ddr_end >> 2);
152 static void fu540_ddr_check_errata(u32 regbase, u32 updownreg)
158 u32 phy_rx_cal_dqn_0_offset;
160 for (u32 bit = 0; bit < 2; bit++) {
162 phy_rx_cal_dqn_0_offset =
163 PHY_RX_CAL_DQ0_0_OFFSET;
165 phy_rx_cal_dqn_0_offset =
166 PHY_RX_CAL_DQ1_0_OFFSET;
170 phy_rx_cal_dqn_0_offset) & 0x3F;
172 (phy_rx_cal_dqn_0_offset + 6)) &
175 failc0 = ((down == 0) && (up == 0x3F));
176 failc1 = ((up == 0) && (down == 0x3F));
178 /* print error message on failure */
179 if (failc0 || failc1) {
181 printf("DDR error in fixing up\n");
188 slicelsc += (dq % 10);
189 slicemsc += (dq / 10);
191 printf("%c", slicemsc);
192 printf("%c", slicelsc);
205 static u64 fu540_ddr_phy_fixup(volatile u32 *ddrphyreg)
209 /* check errata condition */
210 for (u32 slice = 0; slice < 8; slice++) {
211 u32 regbase = slicebase + 34;
213 for (u32 reg = 0; reg < 4; reg++) {
214 u32 updownreg = readl(regbase + reg + ddrphyreg);
216 fu540_ddr_check_errata(regbase, updownreg);
224 static u32 fu540_ddr_get_dram_class(volatile u32 *ctl)
226 u32 reg = readl(DENALI_CTL_0 + ctl);
228 return ((reg >> DRAM_CLASS_OFFSET) & 0xF);
231 static int fu540_ddr_setup(struct udevice *dev)
233 struct fu540_ddr_info *priv = dev_get_priv(dev);
234 struct sifive_dmc_plat *plat = dev_get_platdata(dev);
235 struct fu540_ddr_params *params = &plat->ddr_params;
236 volatile u32 *denali_ctl = priv->ctl->denali_ctl;
237 volatile u32 *denali_phy = priv->phy->denali_phy;
238 const u64 ddr_size = priv->info.size;
239 const u64 ddr_end = priv->info.base + ddr_size;
243 ret = dev_read_u32_array(dev, "sifive,ddr-params",
244 (u32 *)&plat->ddr_params,
245 sizeof(plat->ddr_params) / sizeof(u32));
247 printf("%s: Cannot read sifive,ddr-params %d\n",
252 sdram_copy_to_reg(priv->ctl->denali_ctl,
253 params->pctl_regs.denali_ctl,
254 sizeof(struct fu540_ddrctl));
257 for (i = DENALI_PHY_1152; i <= DENALI_PHY_1214; i++) {
258 physet = params->phy_regs.denali_phy[i];
259 priv->phy->denali_phy[i] = physet;
262 for (i = 0; i < DENALI_PHY_1152; i++) {
263 physet = params->phy_regs.denali_phy[i];
264 priv->phy->denali_phy[i] = physet;
267 /* Disable read interleave DENALI_CTL_120 */
268 setbits_le32(DENALI_CTL_120 + denali_ctl,
269 1 << DISABLE_RD_INTERLEAVE_OFFSET);
271 /* Disable optimal read/modify/write logic DENALI_CTL_21 */
272 clrbits_le32(DENALI_CTL_21 + denali_ctl, 1 << OPTIMAL_RMODW_EN_OFFSET);
274 /* Enable write Leveling DENALI_CTL_170 */
275 setbits_le32(DENALI_CTL_170 + denali_ctl, (1 << WRLVL_EN_OFFSET)
276 | (1 << DFI_PHY_WRLELV_MODE_OFFSET));
278 /* Enable read leveling DENALI_CTL_181 and DENALI_CTL_260 */
279 setbits_le32(DENALI_CTL_181 + denali_ctl,
280 1 << DFI_PHY_RDLVL_MODE_OFFSET);
281 setbits_le32(DENALI_CTL_260 + denali_ctl, 1 << RDLVL_EN_OFFSET);
283 /* Enable read leveling gate DENALI_CTL_260 and DENALI_CTL_182 */
284 setbits_le32(DENALI_CTL_260 + denali_ctl, 1 << RDLVL_GATE_EN_OFFSET);
285 setbits_le32(DENALI_CTL_182 + denali_ctl,
286 1 << DFI_PHY_RDLVL_GATE_MODE_OFFSET);
288 if (fu540_ddr_get_dram_class(denali_ctl) == DRAM_CLASS_DDR4) {
289 /* Enable vref training DENALI_CTL_184 */
290 setbits_le32(DENALI_CTL_184 + denali_ctl, 1 << VREF_EN_OFFSET);
293 /* Mask off leveling completion interrupt DENALI_CTL_136 */
294 setbits_le32(DENALI_CTL_136 + denali_ctl,
295 1 << LEVELING_OPERATION_COMPLETED_OFFSET);
297 /* Mask off MC init complete interrupt DENALI_CTL_136 */
298 setbits_le32(DENALI_CTL_136 + denali_ctl, 1 << MC_INIT_COMPLETE_OFFSET);
300 /* Mask off out of range interrupts DENALI_CTL_136 */
301 setbits_le32(DENALI_CTL_136 + denali_ctl, (1 << OUT_OF_RANGE_OFFSET)
302 | (1 << MULTIPLE_OUT_OF_RANGE_OFFSET));
304 /* set up range protection */
305 fu540_ddr_setup_range_protection(denali_ctl, priv->info.size);
307 /* Mask off port command error interrupt DENALI_CTL_136 */
308 setbits_le32(DENALI_CTL_136 + denali_ctl,
309 1 << PORT_COMMAND_CHANNEL_ERROR_OFFSET);
311 fu540_ddr_start(denali_ctl, priv->physical_filter_ctrl, ddr_end);
313 fu540_ddr_phy_fixup(denali_phy);
316 priv->info.size = get_ram_size((long *)priv->info.base,
319 debug("%s : %lx\n", __func__, (uintptr_t)priv->info.size);
321 /* check memory access for all memory */
322 if (priv->info.size != ddr_size) {
323 printf("DDR invalid size : 0x%lx, expected 0x%lx\n",
324 (uintptr_t)priv->info.size, (uintptr_t)ddr_size);
332 static int fu540_ddr_probe(struct udevice *dev)
334 struct fu540_ddr_info *priv = dev_get_priv(dev);
336 /* Read memory base and size from DT */
337 fdtdec_setup_mem_size_base();
338 priv->info.base = gd->ram_base;
339 priv->info.size = gd->ram_size;
341 #if defined(CONFIG_SPL_BUILD)
346 debug("FU540 DDR probe\n");
349 ret = regmap_init_mem(dev_ofnode(dev), &map);
353 ret = clk_get_by_index(dev, 0, &priv->ddr_clk);
355 debug("clk get failed %d\n", ret);
359 ret = dev_read_u32(dev, "clock-frequency", &clock);
361 debug("clock-frequency not found in dt %d\n", ret);
364 ret = clk_set_rate(&priv->ddr_clk, clock);
366 debug("Could not set DDR clock\n");
371 ret = clk_enable(&priv->ddr_clk);
372 priv->ctl = regmap_get_range(map, 0);
373 priv->phy = regmap_get_range(map, 1);
374 priv->physical_filter_ctrl = regmap_get_range(map, 2);
376 return fu540_ddr_setup(dev);
382 static int fu540_ddr_get_info(struct udevice *dev, struct ram_info *info)
384 struct fu540_ddr_info *priv = dev_get_priv(dev);
391 static struct ram_ops fu540_ddr_ops = {
392 .get_info = fu540_ddr_get_info,
395 static const struct udevice_id fu540_ddr_ids[] = {
396 { .compatible = "sifive,fu540-c000-ddr" },
400 U_BOOT_DRIVER(fu540_ddr) = {
403 .of_match = fu540_ddr_ids,
404 .ops = &fu540_ddr_ops,
405 .probe = fu540_ddr_probe,
406 .priv_auto_alloc_size = sizeof(struct fu540_ddr_info),
407 #if defined(CONFIG_SPL_BUILD)
408 .platdata_auto_alloc_size = sizeof(struct sifive_dmc_plat),