diff options
author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-03-18 07:41:43 (GMT) |
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committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-03-23 16:42:13 (GMT) |
commit | ea65c98050f0f13f933119e1d073c8a138481ee4 (patch) | |
tree | 47fd29a996ceb41bfb974dc09b02ae518d3412d6 /arch/arm/mach-uniphier/dram/umc-pxs2.c | |
parent | 013dcc7863b990f7bd0680e1ced320bf6a963e8f (diff) | |
download | u-boot-ea65c98050f0f13f933119e1d073c8a138481ee4.tar.xz |
ARM: uniphier: drop PH1- prefix from CONFIG options and file names
The current CONFIG names like "CONFIG_ARCH_UNIPHIER_PH1_PRO4" is too
long. It would not hurt to drop "PH1_" because "UNIPHIER_" already
well specifies the SoC family. Also, rename files for consistency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'arch/arm/mach-uniphier/dram/umc-pxs2.c')
-rw-r--r-- | arch/arm/mach-uniphier/dram/umc-pxs2.c | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/dram/umc-pxs2.c b/arch/arm/mach-uniphier/dram/umc-pxs2.c new file mode 100644 index 0000000..50c0238 --- /dev/null +++ b/arch/arm/mach-uniphier/dram/umc-pxs2.c @@ -0,0 +1,637 @@ +/* + * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * based on commit 21b6e480f92ccc38fe0502e3116411d6509d3bf2 of Diag by: + * Copyright (C) 2015 Socionext Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/sizes.h> +#include <asm/processor.h> + +#include "../init.h" +#include "../soc-info.h" +#include "ddrmphy-regs.h" +#include "umc-regs.h" + +#define DRAM_CH_NR 3 + +enum dram_freq { + DRAM_FREQ_1866M, + DRAM_FREQ_2133M, + DRAM_FREQ_NR, +}; + +enum dram_size { + DRAM_SZ_256M, + DRAM_SZ_512M, + DRAM_SZ_NR, +}; + +static u32 ddrphy_pgcr2[DRAM_FREQ_NR] = {0x00FC7E5D, 0x00FC90AB}; +static u32 ddrphy_ptr0[DRAM_FREQ_NR] = {0x0EA09205, 0x10C0A6C6}; +static u32 ddrphy_ptr1[DRAM_FREQ_NR] = {0x0DAC041B, 0x0FA104B1}; +static u32 ddrphy_ptr3[DRAM_FREQ_NR] = {0x15171e45, 0x18182357}; +static u32 ddrphy_ptr4[DRAM_FREQ_NR] = {0x0e9ad8e9, 0x10b34157}; +static u32 ddrphy_dtpr0[DRAM_FREQ_NR] = {0x35a00d88, 0x39e40e88}; +static u32 ddrphy_dtpr1[DRAM_FREQ_NR] = {0x2288cc2c, 0x228a04d0}; +static u32 ddrphy_dtpr2[DRAM_FREQ_NR] = {0x50005e00, 0x50006a00}; +static u32 ddrphy_dtpr3[DRAM_FREQ_NR] = {0x0010cb49, 0x0010ec89}; +static u32 ddrphy_mr0[DRAM_FREQ_NR] = {0x00000115, 0x00000125}; +static u32 ddrphy_mr2[DRAM_FREQ_NR] = {0x000002a0, 0x000002a8}; + +/* dependent on package and board design */ +static u32 ddrphy_acbdlr0[DRAM_CH_NR] = {0x0000000c, 0x0000000c, 0x00000009}; + +static u32 umc_cmdctla[DRAM_FREQ_NR] = {0x66DD131D, 0x77EE1722}; +/* + * The ch2 is a different generation UMC core. + * The register spec is different, unfortunately. + */ +static u32 umc_cmdctlb_ch01[DRAM_FREQ_NR] = {0x13E87C44, 0x18F88C44}; +static u32 umc_cmdctlb_ch2[DRAM_FREQ_NR] = {0x19E8DC44, 0x1EF8EC44}; +static u32 umc_spcctla[DRAM_FREQ_NR][DRAM_SZ_NR] = { + {0x004A071D, 0x0078071D}, + {0x0055081E, 0x0089081E}, +}; + +static u32 umc_spcctlb[] = {0x00FF000A, 0x00FF000B}; +/* The ch2 is different for some reason only hardware guys know... */ +static u32 umc_flowctla_ch01[] = {0x0800001E, 0x08000022}; +static u32 umc_flowctla_ch2[] = {0x0800001E, 0x0800001E}; + +/* DDR multiPHY */ +static inline int ddrphy_get_rank(int dx) +{ + return dx / 2; +} + +static void ddrphy_fifo_reset(void __iomem *phy_base) +{ + u32 tmp; + + tmp = readl(phy_base + DMPHY_PGCR0); + tmp &= ~DMPHY_PGCR0_PHYFRST; + writel(tmp, phy_base + DMPHY_PGCR0); + + udelay(1); + + tmp |= DMPHY_PGCR0_PHYFRST; + writel(tmp, phy_base + DMPHY_PGCR0); + + udelay(1); +} + +static void ddrphy_vt_ctrl(void __iomem *phy_base, int enable) +{ + u32 tmp; + + tmp = readl(phy_base + DMPHY_PGCR1); + + if (enable) + tmp &= ~DMPHY_PGCR1_INHVT; + else + tmp |= DMPHY_PGCR1_INHVT; + + writel(tmp, phy_base + DMPHY_PGCR1); + + if (!enable) { + while (!(readl(phy_base + DMPHY_PGSR1) & DMPHY_PGSR1_VTSTOP)) + cpu_relax(); + } +} + +static void ddrphy_dqs_delay_fixup(void __iomem *phy_base, int nr_dx, int step) +{ + int dx; + u32 lcdlr1, rdqsd; + void __iomem *dx_base = phy_base + DMPHY_DX_BASE; + + ddrphy_vt_ctrl(phy_base, 0); + + for (dx = 0; dx < nr_dx; dx++) { + lcdlr1 = readl(dx_base + DMPHY_DX_LCDLR1); + rdqsd = (lcdlr1 >> 8) & 0xff; + rdqsd = clamp(rdqsd + step, 0U, 0xffU); + lcdlr1 = (lcdlr1 & ~(0xff << 8)) | (rdqsd << 8); + writel(lcdlr1, dx_base + DMPHY_DX_LCDLR1); + readl(dx_base + DMPHY_DX_LCDLR1); /* relax */ + dx_base += DMPHY_DX_STRIDE; + } + + ddrphy_vt_ctrl(phy_base, 1); +} + +static int ddrphy_get_system_latency(void __iomem *phy_base, int width) +{ + void __iomem *dx_base = phy_base + DMPHY_DX_BASE; + const int nr_dx = width / 8; + int dx, rank; + u32 gtr; + int dgsl, dgsl_min = INT_MAX, dgsl_max = 0; + + for (dx = 0; dx < nr_dx; dx++) { + gtr = readl(dx_base + DMPHY_DX_GTR); + for (rank = 0; rank < 4; rank++) { + dgsl = gtr & 0x7; + /* if dgsl is zero, this rank was not trained. skip. */ + if (dgsl) { + dgsl_min = min(dgsl_min, dgsl); + dgsl_max = max(dgsl_max, dgsl); + } + gtr >>= 3; + } + dx_base += DMPHY_DX_STRIDE; + } + + if (dgsl_min != dgsl_max) + printf("DQS Gateing System Latencies are not all leveled.\n"); + + return dgsl_max; +} + +static void ddrphy_init(void __iomem *phy_base, enum dram_freq freq, int width, + int ch) +{ + u32 tmp; + void __iomem *zq_base, *dx_base; + int zq, dx; + int nr_dx; + + nr_dx = width / 8; + + writel(DMPHY_PIR_ZCALBYP, phy_base + DMPHY_PIR); + /* + * Disable RGLVT bit (Read DQS Gating LCDL Delay VT Compensation) + * to avoid read error issue. + */ + writel(0x07d81e37, phy_base + DMPHY_PGCR0); + writel(0x0200c4e0, phy_base + DMPHY_PGCR1); + + tmp = ddrphy_pgcr2[freq]; + if (width >= 32) + tmp |= DMPHY_PGCR2_DUALCHN | DMPHY_PGCR2_ACPDDC; + writel(tmp, phy_base + DMPHY_PGCR2); + + writel(ddrphy_ptr0[freq], phy_base + DMPHY_PTR0); + writel(ddrphy_ptr1[freq], phy_base + DMPHY_PTR1); + writel(0x00083def, phy_base + DMPHY_PTR2); + writel(ddrphy_ptr3[freq], phy_base + DMPHY_PTR3); + writel(ddrphy_ptr4[freq], phy_base + DMPHY_PTR4); + + writel(ddrphy_acbdlr0[ch], phy_base + DMPHY_ACBDLR0); + + writel(0x55555555, phy_base + DMPHY_ACIOCR1); + writel(0x00000000, phy_base + DMPHY_ACIOCR2); + writel(0x55555555, phy_base + DMPHY_ACIOCR3); + writel(0x00000000, phy_base + DMPHY_ACIOCR4); + writel(0x00000055, phy_base + DMPHY_ACIOCR5); + writel(0x00181aa4, phy_base + DMPHY_DXCCR); + + writel(0x0024641e, phy_base + DMPHY_DSGCR); + writel(0x0000040b, phy_base + DMPHY_DCR); + writel(ddrphy_dtpr0[freq], phy_base + DMPHY_DTPR0); + writel(ddrphy_dtpr1[freq], phy_base + DMPHY_DTPR1); + writel(ddrphy_dtpr2[freq], phy_base + DMPHY_DTPR2); + writel(ddrphy_dtpr3[freq], phy_base + DMPHY_DTPR3); + writel(ddrphy_mr0[freq], phy_base + DMPHY_MR0); + writel(0x00000006, phy_base + DMPHY_MR1); + writel(ddrphy_mr2[freq], phy_base + DMPHY_MR2); + writel(0x00000000, phy_base + DMPHY_MR3); + + tmp = 0; + for (dx = 0; dx < nr_dx; dx++) + tmp |= BIT(DMPHY_DTCR_RANKEN_SHIFT + ddrphy_get_rank(dx)); + writel(0x90003087 | tmp, phy_base + DMPHY_DTCR); + + writel(0x00000000, phy_base + DMPHY_DTAR0); + writel(0x00000008, phy_base + DMPHY_DTAR1); + writel(0x00000010, phy_base + DMPHY_DTAR2); + writel(0x00000018, phy_base + DMPHY_DTAR3); + writel(0xdd22ee11, phy_base + DMPHY_DTDR0); + writel(0x7788bb44, phy_base + DMPHY_DTDR1); + + /* impedance control settings */ + writel(0x04048900, phy_base + DMPHY_ZQCR); + + zq_base = phy_base + DMPHY_ZQ_BASE; + for (zq = 0; zq < 4; zq++) { + /* + * board-dependent + * PXS2: CH0ZQ0=0x5B, CH1ZQ0=0x5B, CH2ZQ0=0x59, others=0x5D + */ + writel(0x0007BB5D, zq_base + DMPHY_ZQ_PR); + zq_base += DMPHY_ZQ_STRIDE; + } + + /* DATX8 settings */ + dx_base = phy_base + DMPHY_DX_BASE; + for (dx = 0; dx < 4; dx++) { + tmp = readl(dx_base + DMPHY_DX_GCR0); + tmp &= ~DMPHY_DX_GCR0_WLRKEN_MASK; + tmp |= BIT(DMPHY_DX_GCR0_WLRKEN_SHIFT + ddrphy_get_rank(dx)) & + DMPHY_DX_GCR0_WLRKEN_MASK; + writel(tmp, dx_base + DMPHY_DX_GCR0); + + writel(0x00000000, dx_base + DMPHY_DX_GCR1); + writel(0x00000000, dx_base + DMPHY_DX_GCR2); + writel(0x00000000, dx_base + DMPHY_DX_GCR3); + dx_base += DMPHY_DX_STRIDE; + } + + while (!(readl(phy_base + DMPHY_PGSR0) & DMPHY_PGSR0_IDONE)) + cpu_relax(); + + ddrphy_dqs_delay_fixup(phy_base, nr_dx, -4); +} + +struct ddrphy_init_sequence { + char *description; + u32 init_flag; + u32 done_flag; + u32 err_flag; +}; + +static const struct ddrphy_init_sequence impedance_calibration_sequence[] = { + { + "Impedance Calibration", + DMPHY_PIR_ZCAL, + DMPHY_PGSR0_ZCDONE, + DMPHY_PGSR0_ZCERR, + }, + { /* sentinel */ } +}; + +static const struct ddrphy_init_sequence dram_init_sequence[] = { + { + "DRAM Initialization", + DMPHY_PIR_DRAMRST | DMPHY_PIR_DRAMINIT, + DMPHY_PGSR0_DIDONE, + 0, + }, + { /* sentinel */ } +}; + +static const struct ddrphy_init_sequence training_sequence[] = { + { + "Write Leveling", + DMPHY_PIR_WL, + DMPHY_PGSR0_WLDONE, + DMPHY_PGSR0_WLERR, + }, + { + "Read DQS Gate Training", + DMPHY_PIR_QSGATE, + DMPHY_PGSR0_QSGDONE, + DMPHY_PGSR0_QSGERR, + }, + { + "Write Leveling Adjustment", + DMPHY_PIR_WLADJ, + DMPHY_PGSR0_WLADONE, + DMPHY_PGSR0_WLAERR, + }, + { + "Read Bit Deskew", + DMPHY_PIR_RDDSKW, + DMPHY_PGSR0_RDDONE, + DMPHY_PGSR0_RDERR, + }, + { + "Write Bit Deskew", + DMPHY_PIR_WRDSKW, + DMPHY_PGSR0_WDDONE, + DMPHY_PGSR0_WDERR, + }, + { + "Read Eye Training", + DMPHY_PIR_RDEYE, + DMPHY_PGSR0_REDONE, + DMPHY_PGSR0_REERR, + }, + { + "Write Eye Training", + DMPHY_PIR_WREYE, + DMPHY_PGSR0_WEDONE, + DMPHY_PGSR0_WEERR, + }, + { /* sentinel */ } +}; + +static int __ddrphy_training(void __iomem *phy_base, + const struct ddrphy_init_sequence *seq) +{ + const struct ddrphy_init_sequence *s; + u32 pgsr0; + u32 init_flag = DMPHY_PIR_INIT; + u32 done_flag = DMPHY_PGSR0_IDONE; + int timeout = 50000; /* 50 msec is long enough */ +#ifdef DISPLAY_ELAPSED_TIME + ulong start = get_timer(0); +#endif + + for (s = seq; s->description; s++) { + init_flag |= s->init_flag; + done_flag |= s->done_flag; + } + + writel(init_flag, phy_base + DMPHY_PIR); + + do { + if (--timeout < 0) { + pr_err("%s: error: timeout during DDR training\n", + __func__); + return -ETIMEDOUT; + } + udelay(1); + pgsr0 = readl(phy_base + DMPHY_PGSR0); + } while ((pgsr0 & done_flag) != done_flag); + + for (s = seq; s->description; s++) { + if (pgsr0 & s->err_flag) { + pr_err("%s: error: %s failed\n", __func__, + s->description); + return -EIO; + } + } + +#ifdef DISPLAY_ELAPSED_TIME + printf("%s: info: elapsed time %ld msec\n", get_timer(start)); +#endif + + return 0; +} + +static int ddrphy_impedance_calibration(void __iomem *phy_base) +{ + int ret; + u32 tmp; + + ret = __ddrphy_training(phy_base, impedance_calibration_sequence); + if (ret) + return ret; + + /* + * Because of a hardware bug, IDONE flag is set when the first ZQ block + * is calibrated. The flag does not guarantee the completion for all + * the ZQ blocks. Wait a little more just in case. + */ + udelay(1); + + /* reflect ZQ settings and enable average algorithm*/ + tmp = readl(phy_base + DMPHY_ZQCR); + tmp |= DMPHY_ZQCR_FORCE_ZCAL_VT_UPDATE; + writel(tmp, phy_base + DMPHY_ZQCR); + tmp &= ~DMPHY_ZQCR_FORCE_ZCAL_VT_UPDATE; + tmp |= DMPHY_ZQCR_AVGEN; + writel(tmp, phy_base + DMPHY_ZQCR); + + return 0; +} + +static int ddrphy_dram_init(void __iomem *phy_base) +{ + return __ddrphy_training(phy_base, dram_init_sequence); +} + +static int ddrphy_training(void __iomem *phy_base) +{ + return __ddrphy_training(phy_base, training_sequence); +} + +/* UMC */ +static void umc_set_system_latency(void __iomem *dc_base, int phy_latency) +{ + u32 val; + int latency; + + val = readl(dc_base + UMC_RDATACTL_D0); + latency = (val & UMC_RDATACTL_RADLTY_MASK) >> UMC_RDATACTL_RADLTY_SHIFT; + latency += (val & UMC_RDATACTL_RAD2LTY_MASK) >> + UMC_RDATACTL_RAD2LTY_SHIFT; + /* + * UMC works at the half clock rate of the PHY. + * The LSB of latency is ignored + */ + latency += phy_latency & ~1; + + val &= ~(UMC_RDATACTL_RADLTY_MASK | UMC_RDATACTL_RAD2LTY_MASK); + if (latency > 0xf) { + val |= 0xf << UMC_RDATACTL_RADLTY_SHIFT; + val |= (latency - 0xf) << UMC_RDATACTL_RAD2LTY_SHIFT; + } else { + val |= latency << UMC_RDATACTL_RADLTY_SHIFT; + } + + writel(val, dc_base + UMC_RDATACTL_D0); + writel(val, dc_base + UMC_RDATACTL_D1); + + readl(dc_base + UMC_RDATACTL_D1); /* relax */ +} + +/* enable/disable auto refresh */ +void umc_refresh_ctrl(void __iomem *dc_base, int enable) +{ + u32 tmp; + + tmp = readl(dc_base + UMC_SPCSETB); + tmp &= ~UMC_SPCSETB_AREFMD_MASK; + + if (enable) + tmp |= UMC_SPCSETB_AREFMD_ARB; + else + tmp |= UMC_SPCSETB_AREFMD_REG; + + writel(tmp, dc_base + UMC_SPCSETB); + udelay(1); +} + +static void umc_ud_init(void __iomem *umc_base, int ch) +{ + writel(0x00000003, umc_base + UMC_BITPERPIXELMODE_D0); + + if (ch == 2) + writel(0x00000033, umc_base + UMC_PAIR1DOFF_D0); +} + +static int umc_dc_init(void __iomem *dc_base, enum dram_freq freq, + unsigned long size, int width, int ch) +{ + enum dram_size size_e; + int latency; + u32 val; + + switch (size) { + case 0: + return 0; + case SZ_256M: + size_e = DRAM_SZ_256M; + break; + case SZ_512M: + size_e = DRAM_SZ_512M; + break; + default: + pr_err("unsupported DRAM size 0x%08lx (per 16bit) for ch%d\n", + size, ch); + return -EINVAL; + } + + writel(umc_cmdctla[freq], dc_base + UMC_CMDCTLA); + + writel(ch == 2 ? umc_cmdctlb_ch2[freq] : umc_cmdctlb_ch01[freq], + dc_base + UMC_CMDCTLB); + + writel(umc_spcctla[freq][size_e], dc_base + UMC_SPCCTLA); + writel(umc_spcctlb[freq], dc_base + UMC_SPCCTLB); + + val = 0x000e000e; + latency = 12; + /* ES2 inserted one more FF to the logic. */ + if (uniphier_get_soc_model() >= 2) + latency += 2; + + if (latency > 0xf) { + val |= 0xf << UMC_RDATACTL_RADLTY_SHIFT; + val |= (latency - 0xf) << UMC_RDATACTL_RAD2LTY_SHIFT; + } else { + val |= latency << UMC_RDATACTL_RADLTY_SHIFT; + } + + writel(val, dc_base + UMC_RDATACTL_D0); + if (width >= 32) + writel(val, dc_base + UMC_RDATACTL_D1); + + writel(0x04060A02, dc_base + UMC_WDATACTL_D0); + if (width >= 32) + writel(0x04060A02, dc_base + UMC_WDATACTL_D1); + writel(0x04000000, dc_base + UMC_DATASET); + writel(0x00400020, dc_base + UMC_DCCGCTL); + writel(0x00000084, dc_base + UMC_FLOWCTLG); + writel(0x00000000, dc_base + UMC_ACSSETA); + + writel(ch == 2 ? umc_flowctla_ch2[freq] : umc_flowctla_ch01[freq], + dc_base + UMC_FLOWCTLA); + + writel(0x00004400, dc_base + UMC_FLOWCTLC); + writel(0x200A0A00, dc_base + UMC_SPCSETB); + writel(0x00000520, dc_base + UMC_DFICUPDCTLA); + writel(0x0000000D, dc_base + UMC_RESPCTL); + + if (ch != 2) { + writel(0x00202000, dc_base + UMC_FLOWCTLB); + writel(0xFDBFFFFF, dc_base + UMC_FLOWCTLOB0); + writel(0xFFFFFFFF, dc_base + UMC_FLOWCTLOB1); + writel(0x00080700, dc_base + UMC_BSICMAPSET); + } else { + writel(0x00200000, dc_base + UMC_FLOWCTLB); + writel(0x00000000, dc_base + UMC_BSICMAPSET); + } + + writel(0x00000000, dc_base + UMC_ERRMASKA); + writel(0x00000000, dc_base + UMC_ERRMASKB); + + return 0; +} + +static int umc_ch_init(void __iomem *umc_ch_base, enum dram_freq freq, + unsigned long size, unsigned int width, int ch) +{ + void __iomem *dc_base = umc_ch_base + 0x00011000; + void __iomem *phy_base = umc_ch_base + 0x00030000; + int ret; + + writel(0x00000002, dc_base + UMC_INITSET); + while (readl(dc_base + UMC_INITSTAT) & BIT(2)) + cpu_relax(); + + /* deassert PHY reset signals */ + writel(UMC_DIOCTLA_CTL_NRST | UMC_DIOCTLA_CFG_NRST, + dc_base + UMC_DIOCTLA); + + ddrphy_init(phy_base, freq, width, ch); + + ret = ddrphy_impedance_calibration(phy_base); + if (ret) + return ret; + + ddrphy_dram_init(phy_base); + if (ret) + return ret; + + ret = umc_dc_init(dc_base, freq, size, width, ch); + if (ret) + return ret; + + umc_ud_init(umc_ch_base, ch); + + ret = ddrphy_training(phy_base); + if (ret) + return ret; + + udelay(1); + + /* match the system latency between UMC and PHY */ + umc_set_system_latency(dc_base, + ddrphy_get_system_latency(phy_base, width)); + + udelay(1); + + /* stop auto refresh before clearing FIFO in PHY */ + umc_refresh_ctrl(dc_base, 0); + ddrphy_fifo_reset(phy_base); + umc_refresh_ctrl(dc_base, 1); + + udelay(10); + + return 0; +} + +static void um_init(void __iomem *um_base) +{ + writel(0x000000ff, um_base + UMC_MBUS0); + writel(0x000000ff, um_base + UMC_MBUS1); + writel(0x000000ff, um_base + UMC_MBUS2); + writel(0x000000ff, um_base + UMC_MBUS3); +} + +int proxstream2_umc_init(const struct uniphier_board_data *bd) +{ + void __iomem *um_base = (void __iomem *)0x5b600000; + void __iomem *umc_ch_base = (void __iomem *)0x5b800000; + enum dram_freq freq; + int ch, ret; + + switch (bd->dram_freq) { + case 1866: + freq = DRAM_FREQ_1866M; + break; + case 2133: + freq = DRAM_FREQ_2133M; + break; + default: + pr_err("unsupported DRAM frequency %d MHz\n", bd->dram_freq); + return -EINVAL; + } + + for (ch = 0; ch < bd->dram_nr_ch; ch++) { + unsigned long size = bd->dram_ch[ch].size; + unsigned int width = bd->dram_ch[ch].width; + + ret = umc_ch_init(umc_ch_base, freq, size / (width / 16), + width, ch); + if (ret) { + pr_err("failed to initialize UMC ch%d\n", ch); + return ret; + } + + umc_ch_base += 0x00200000; + } + + um_init(um_base); + + return 0; +} |