// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2018 Marek Vasut */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "tmio-common.h" #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) /* SCC registers */ #define RENESAS_SDHI_SCC_DTCNTL 0x800 #define RENESAS_SDHI_SCC_DTCNTL_TAPEN BIT(0) #define RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT 16 #define RENESAS_SDHI_SCC_DTCNTL_TAPNUM_MASK 0xff #define RENESAS_SDHI_SCC_TAPSET 0x804 #define RENESAS_SDHI_SCC_DT2FF 0x808 #define RENESAS_SDHI_SCC_CKSEL 0x80c #define RENESAS_SDHI_SCC_CKSEL_DTSEL BIT(0) #define RENESAS_SDHI_SCC_RVSCNTL 0x810 #define RENESAS_SDHI_SCC_RVSCNTL_RVSEN BIT(0) #define RENESAS_SDHI_SCC_RVSREQ 0x814 #define RENESAS_SDHI_SCC_RVSREQ_RVSERR BIT(2) #define RENESAS_SDHI_SCC_RVSREQ_REQTAPUP BIT(1) #define RENESAS_SDHI_SCC_RVSREQ_REQTAPDOWN BIT(0) #define RENESAS_SDHI_SCC_SMPCMP 0x818 #define RENESAS_SDHI_SCC_SMPCMP_CMD_ERR (BIT(24) | BIT(8)) #define RENESAS_SDHI_SCC_SMPCMP_CMD_REQUP BIT(24) #define RENESAS_SDHI_SCC_SMPCMP_CMD_REQDOWN BIT(8) #define RENESAS_SDHI_SCC_TMPPORT2 0x81c #define RENESAS_SDHI_SCC_TMPPORT2_HS400EN BIT(31) #define RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL BIT(4) #define RENESAS_SDHI_SCC_TMPPORT3 0x828 #define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_0 3 #define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_1 2 #define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_2 1 #define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_3 0 #define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_MASK 0x3 #define RENESAS_SDHI_SCC_TMPPORT4 0x82c #define RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START BIT(0) #define RENESAS_SDHI_SCC_TMPPORT5 0x830 #define RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R BIT(8) #define RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W (0 << 8) #define RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK 0x3F #define RENESAS_SDHI_SCC_TMPPORT6 0x834 #define RENESAS_SDHI_SCC_TMPPORT7 0x838 #define RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE 0xa5000000 #define RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK 0x1f #define RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE BIT(7) #define RENESAS_SDHI_MAX_TAP 3 #define CALIB_TABLE_MAX (RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK + 1) static const u8 r8a7796_rev13_calib_table[2][CALIB_TABLE_MAX] = { { 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 15, 16, 16, 16, 16, 16, 16, 17, 18, 18, 19, 20, 21, 22, 23, 24, 25 }, { 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 7, 8, 11, 12, 17, 18, 18, 18, 18, 18, 18, 18, 19, 20, 21, 22, 23, 25, 25 } }; static const u8 r8a77965_calib_table[2][CALIB_TABLE_MAX] = { { 1, 2, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 15, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25, 26, 27, 28, 29, 30, 31 }, { 2, 3, 4, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17, 17, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 31, 31, 31 } }; static const u8 r8a77990_calib_table[2][CALIB_TABLE_MAX] = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 1, 2, 3, 3, 4, 4, 4, 5, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 17, 17, 18, 18, 19, 20, 22, 24, 25, 26, 26 } }; static int rcar_is_gen3_mmc0(struct tmio_sd_priv *priv) { /* On R-Car Gen3, MMC0 is at 0xee140000 */ return (uintptr_t)(priv->regbase) == 0xee140000; } static u32 sd_scc_tmpport_read32(struct tmio_sd_priv *priv, u32 addr) { /* read mode */ tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R | (RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr), RENESAS_SDHI_SCC_TMPPORT5); /* access start and stop */ tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START, RENESAS_SDHI_SCC_TMPPORT4); tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT4); return tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT7); } static void sd_scc_tmpport_write32(struct tmio_sd_priv *priv, u32 addr, u32 val) { /* write mode */ tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W | (RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr), RENESAS_SDHI_SCC_TMPPORT5); tmio_sd_writel(priv, val, RENESAS_SDHI_SCC_TMPPORT6); /* access start and stop */ tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START, RENESAS_SDHI_SCC_TMPPORT4); tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT4); } static bool renesas_sdhi_check_scc_error(struct udevice *dev) { struct tmio_sd_priv *priv = dev_get_priv(dev); struct mmc *mmc = mmc_get_mmc_dev(dev); unsigned long new_tap = priv->tap_set; unsigned long error_tap = priv->tap_set; u32 reg, smpcmp; if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) && (mmc->selected_mode != UHS_SDR104) && (mmc->selected_mode != MMC_HS_200) && (mmc->selected_mode != MMC_HS_400) && (priv->nrtaps != 4)) return false; reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL); /* Handle automatic tuning correction */ if (reg & RENESAS_SDHI_SCC_RVSCNTL_RVSEN) { reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSREQ); if (reg & RENESAS_SDHI_SCC_RVSREQ_RVSERR) { tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ); return true; } return false; } /* Handle manual tuning correction */ reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSREQ); if (!reg) /* No error */ return false; tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ); if (mmc->selected_mode == MMC_HS_400) { /* * Correction Error Status contains CMD and DAT signal status. * In HS400, DAT signal based on DS signal, not CLK. * Therefore, use only CMD status. */ smpcmp = tmio_sd_readl(priv, RENESAS_SDHI_SCC_SMPCMP) & RENESAS_SDHI_SCC_SMPCMP_CMD_ERR; switch (smpcmp) { case 0: return false; /* No error in CMD signal */ case RENESAS_SDHI_SCC_SMPCMP_CMD_REQUP: new_tap = (priv->tap_set + priv->tap_num + 1) % priv->tap_num; error_tap = (priv->tap_set + priv->tap_num - 1) % priv->tap_num; break; case RENESAS_SDHI_SCC_SMPCMP_CMD_REQDOWN: new_tap = (priv->tap_set + priv->tap_num - 1) % priv->tap_num; error_tap = (priv->tap_set + priv->tap_num + 1) % priv->tap_num; break; default: return true; /* Need re-tune */ } if (priv->hs400_bad_tap & BIT(new_tap)) { /* * New tap is bad tap (cannot change). * Compare with HS200 tuning result. * In HS200 tuning, when smpcmp[error_tap] * is OK, retune is executed. */ if (priv->smpcmp & BIT(error_tap)) return true; /* Need retune */ return false; /* cannot change */ } priv->tap_set = new_tap; } else { if (reg & RENESAS_SDHI_SCC_RVSREQ_RVSERR) return true; /* Need re-tune */ else if (reg & RENESAS_SDHI_SCC_RVSREQ_REQTAPUP) priv->tap_set = (priv->tap_set + priv->tap_num + 1) % priv->tap_num; else if (reg & RENESAS_SDHI_SCC_RVSREQ_REQTAPDOWN) priv->tap_set = (priv->tap_set + priv->tap_num - 1) % priv->tap_num; else return false; } /* Set TAP position */ tmio_sd_writel(priv, priv->tap_set >> ((priv->nrtaps == 4) ? 1 : 0), RENESAS_SDHI_SCC_TAPSET); return false; } static void renesas_sdhi_adjust_hs400_mode_enable(struct tmio_sd_priv *priv) { u32 calib_code; if (!priv->adjust_hs400_enable) return; if (!priv->needs_adjust_hs400) return; if (!priv->adjust_hs400_calib_table) return; /* * Enabled Manual adjust HS400 mode * * 1) Disabled Write Protect * W(addr=0x00, WP_DISABLE_CODE) * * 2) Read Calibration code * read_value = R(addr=0x26) * 3) Refer to calibration table * Calibration code = table[read_value] * 4) Enabled Manual Calibration * W(addr=0x22, manual mode | Calibration code) * 5) Set Offset value to TMPPORT3 Reg */ sd_scc_tmpport_write32(priv, 0x00, RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE); calib_code = sd_scc_tmpport_read32(priv, 0x26); calib_code &= RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK; sd_scc_tmpport_write32(priv, 0x22, RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE | priv->adjust_hs400_calib_table[calib_code]); tmio_sd_writel(priv, priv->adjust_hs400_offset, RENESAS_SDHI_SCC_TMPPORT3); /* Clear flag */ priv->needs_adjust_hs400 = false; } static void renesas_sdhi_adjust_hs400_mode_disable(struct tmio_sd_priv *priv) { /* Disabled Manual adjust HS400 mode * * 1) Disabled Write Protect * W(addr=0x00, WP_DISABLE_CODE) * 2) Disabled Manual Calibration * W(addr=0x22, 0) * 3) Clear offset value to TMPPORT3 Reg */ sd_scc_tmpport_write32(priv, 0x00, RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE); sd_scc_tmpport_write32(priv, 0x22, 0); tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT3); } static unsigned int renesas_sdhi_init_tuning(struct tmio_sd_priv *priv) { u32 reg; /* Initialize SCC */ tmio_sd_writel(priv, 0, TMIO_SD_INFO1); reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL); reg &= ~TMIO_SD_CLKCTL_SCLKEN; tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL); /* Set sampling clock selection range */ tmio_sd_writel(priv, (0x8 << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) | RENESAS_SDHI_SCC_DTCNTL_TAPEN, RENESAS_SDHI_SCC_DTCNTL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL); reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL); reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL); tmio_sd_writel(priv, 0x300 /* scc_tappos */, RENESAS_SDHI_SCC_DT2FF); reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL); reg |= TMIO_SD_CLKCTL_SCLKEN; tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL); /* Read TAPNUM */ return (tmio_sd_readl(priv, RENESAS_SDHI_SCC_DTCNTL) >> RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) & RENESAS_SDHI_SCC_DTCNTL_TAPNUM_MASK; } static void renesas_sdhi_reset_tuning(struct tmio_sd_priv *priv, bool clk_disable) { u32 reg; /* Reset SCC */ reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL); reg &= ~TMIO_SD_CLKCTL_SCLKEN; tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL); reg &= ~RENESAS_SDHI_SCC_CKSEL_DTSEL; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2); reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN | RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL); tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2); /* Disable HS400 mode adjustment */ renesas_sdhi_adjust_hs400_mode_disable(priv); reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL); reg |= TMIO_SD_CLKCTL_SCLKEN; tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL); reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL); reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL); if (clk_disable) { reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL); reg &= ~TMIO_SD_CLKCTL_SCLKEN; tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL); } } static int renesas_sdhi_hs400(struct udevice *dev) { struct tmio_sd_priv *priv = dev_get_priv(dev); struct mmc *mmc = mmc_get_mmc_dev(dev); bool hs400 = (mmc->selected_mode == MMC_HS_400); int ret, taps = hs400 ? priv->nrtaps : 8; const u32 sdn_rate = 200000000; u32 sdnh_rate = 800000000; unsigned long new_tap; u32 reg; if (clk_valid(&priv->clkh) && !priv->needs_clkh_fallback) { /* HS400 on 4tap SoC => SDnH=400 MHz, SDn=200 MHz */ if (taps == 4) sdnh_rate /= 2; ret = clk_set_rate(&priv->clkh, sdnh_rate); if (ret < 0) return ret; } ret = clk_set_rate(&priv->clk, sdn_rate); if (ret < 0) return ret; reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL); reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL); reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2); if (hs400) { reg |= RENESAS_SDHI_SCC_TMPPORT2_HS400EN | RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL; } else { reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN | RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL); } tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2); /* Disable HS400 mode adjustment */ if (!hs400) renesas_sdhi_adjust_hs400_mode_disable(priv); tmio_sd_writel(priv, (0x8 << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) | RENESAS_SDHI_SCC_DTCNTL_TAPEN, RENESAS_SDHI_SCC_DTCNTL); /* Avoid bad TAP */ if (priv->hs400_bad_tap & BIT(priv->tap_set)) { new_tap = (priv->tap_set + priv->tap_num + 1) % priv->tap_num; if (priv->hs400_bad_tap & BIT(new_tap)) new_tap = (priv->tap_set + priv->tap_num - 1) % priv->tap_num; if (priv->hs400_bad_tap & BIT(new_tap)) { new_tap = priv->tap_set; debug("Three consecutive bad tap is prohibited\n"); } priv->tap_set = new_tap; tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET); } if (taps == 4) { tmio_sd_writel(priv, priv->tap_set >> 1, RENESAS_SDHI_SCC_TAPSET); tmio_sd_writel(priv, hs400 ? 0x100 : 0x300, RENESAS_SDHI_SCC_DT2FF); } else { tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET); tmio_sd_writel(priv, 0x300, RENESAS_SDHI_SCC_DT2FF); } reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL); reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL); /* Execute adjust hs400 offset after setting to HS400 mode */ if (hs400) priv->needs_adjust_hs400 = true; return 0; } static void renesas_sdhi_prepare_tuning(struct tmio_sd_priv *priv, unsigned long tap) { /* Set sampling clock position */ tmio_sd_writel(priv, tap, RENESAS_SDHI_SCC_TAPSET); } static unsigned int renesas_sdhi_compare_scc_data(struct tmio_sd_priv *priv) { /* Get comparison of sampling data */ return tmio_sd_readl(priv, RENESAS_SDHI_SCC_SMPCMP); } static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv, unsigned int taps) { unsigned long tap_cnt; /* counter of tuning success */ unsigned long tap_start;/* start position of tuning success */ unsigned long tap_end; /* end position of tuning success */ unsigned long ntap; /* temporary counter of tuning success */ unsigned long match_cnt;/* counter of matching data */ unsigned long i; bool select = false; u32 reg; priv->needs_adjust_hs400 = false; /* Clear SCC_RVSREQ */ tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ); /* Merge the results */ for (i = 0; i < priv->tap_num * 2; i++) { if (!(taps & BIT(i))) { taps &= ~BIT(i % priv->tap_num); taps &= ~BIT((i % priv->tap_num) + priv->tap_num); } if (!(priv->smpcmp & BIT(i))) { priv->smpcmp &= ~BIT(i % priv->tap_num); priv->smpcmp &= ~BIT((i % priv->tap_num) + priv->tap_num); } } /* * Find the longest consecutive run of successful probes. If that * is more than RENESAS_SDHI_MAX_TAP probes long then use the * center index as the tap. */ tap_cnt = 0; ntap = 0; tap_start = 0; tap_end = 0; for (i = 0; i < priv->tap_num * 2; i++) { if (taps & BIT(i)) ntap++; else { if (ntap > tap_cnt) { tap_start = i - ntap; tap_end = i - 1; tap_cnt = ntap; } ntap = 0; } } if (ntap > tap_cnt) { tap_start = i - ntap; tap_end = i - 1; tap_cnt = ntap; } /* * If all of the TAP is OK, the sampling clock position is selected by * identifying the change point of data. */ if (tap_cnt == priv->tap_num * 2) { match_cnt = 0; ntap = 0; tap_start = 0; tap_end = 0; for (i = 0; i < priv->tap_num * 2; i++) { if (priv->smpcmp & BIT(i)) ntap++; else { if (ntap > match_cnt) { tap_start = i - ntap; tap_end = i - 1; match_cnt = ntap; } ntap = 0; } } if (ntap > match_cnt) { tap_start = i - ntap; tap_end = i - 1; match_cnt = ntap; } if (match_cnt) select = true; } else if (tap_cnt >= RENESAS_SDHI_MAX_TAP) select = true; if (select) priv->tap_set = ((tap_start + tap_end) / 2) % priv->tap_num; else return -EIO; /* Set SCC */ tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET); /* Enable auto re-tuning */ reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL); reg |= RENESAS_SDHI_SCC_RVSCNTL_RVSEN; tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL); return 0; } int renesas_sdhi_execute_tuning(struct udevice *dev, uint opcode) { struct tmio_sd_priv *priv = dev_get_priv(dev); struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); struct mmc *mmc = upriv->mmc; unsigned int tap_num; unsigned int taps = 0; int i, ret = 0; u32 caps; /* Only supported on Renesas RCar */ if (!(priv->caps & TMIO_SD_CAP_RCAR_UHS)) return -EINVAL; /* clock tuning is not needed for upto 52MHz */ if (!((mmc->selected_mode == MMC_HS_200) || (mmc->selected_mode == MMC_HS_400) || (mmc->selected_mode == UHS_SDR104) || (mmc->selected_mode == UHS_SDR50))) return 0; tap_num = renesas_sdhi_init_tuning(priv); if (!tap_num) /* Tuning is not supported */ goto out; priv->tap_num = tap_num; if (priv->tap_num * 2 >= sizeof(taps) * 8) { dev_err(dev, "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); goto out; } priv->smpcmp = 0; /* Issue CMD19 twice for each tap */ for (i = 0; i < 2 * priv->tap_num; i++) { renesas_sdhi_prepare_tuning(priv, i % priv->tap_num); /* Force PIO for the tuning */ caps = priv->caps; priv->caps &= ~TMIO_SD_CAP_DMA_INTERNAL; ret = mmc_send_tuning(mmc, opcode, NULL); priv->caps = caps; if (ret == 0) taps |= BIT(i); ret = renesas_sdhi_compare_scc_data(priv); if (ret == 0) priv->smpcmp |= BIT(i); mdelay(1); /* * eMMC specification specifies that CMD12 can be used to stop a tuning * command, but SD specification does not, so do nothing unless it is * eMMC. */ if (ret && (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200)) { ret = mmc_send_stop_transmission(mmc, false); if (ret < 0) dev_dbg(dev, "Tuning abort fail (%d)\n", ret); } } ret = renesas_sdhi_select_tuning(priv, taps); out: if (ret < 0) { dev_warn(dev, "Tuning procedure failed\n"); renesas_sdhi_reset_tuning(priv, true); } return ret; } #else static int renesas_sdhi_hs400(struct udevice *dev) { return 0; } #endif static int renesas_sdhi_set_ios(struct udevice *dev) { struct tmio_sd_priv *priv = dev_get_priv(dev); u32 tmp; int ret; /* Stop the clock before changing its rate to avoid a glitch signal */ tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL); tmp &= ~TMIO_SD_CLKCTL_SCLKEN; tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL); ret = renesas_sdhi_hs400(dev); if (ret) return ret; ret = tmio_sd_set_ios(dev); mdelay(10); #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) struct mmc *mmc = mmc_get_mmc_dev(dev); if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) && (mmc->selected_mode != UHS_SDR104) && (mmc->selected_mode != MMC_HS_200) && (mmc->selected_mode != MMC_HS_400)) { renesas_sdhi_reset_tuning(priv, mmc->clk_disable); } #endif return ret; } #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) static int renesas_sdhi_wait_dat0(struct udevice *dev, int state, int timeout_us) { int ret = -ETIMEDOUT; bool dat0_high; bool target_dat0_high = !!state; struct tmio_sd_priv *priv = dev_get_priv(dev); timeout_us = DIV_ROUND_UP(timeout_us, 10); /* check every 10 us. */ while (timeout_us--) { dat0_high = !!(tmio_sd_readl(priv, TMIO_SD_INFO2) & TMIO_SD_INFO2_DAT0); if (dat0_high == target_dat0_high) { ret = 0; break; } udelay(10); } return ret; } #endif #define RENESAS_SDHI_DMA_ALIGNMENT 128 static int renesas_sdhi_addr_aligned_gen(uintptr_t ubuf, size_t len, size_t len_aligned) { /* Check if start is aligned */ if (!IS_ALIGNED(ubuf, RENESAS_SDHI_DMA_ALIGNMENT)) { debug("Unaligned buffer address %lx\n", ubuf); return 0; } /* Check if length is aligned */ if (len != len_aligned) { debug("Unaligned buffer length %zu\n", len); return 0; } #ifdef CONFIG_PHYS_64BIT /* Check if below 32bit boundary */ if ((ubuf >> 32) || (ubuf + len_aligned) >> 32) { debug("Buffer above 32bit boundary %lx-%lx\n", ubuf, ubuf + len_aligned); return 0; } #endif /* Aligned */ return 1; } static int renesas_sdhi_addr_aligned(struct bounce_buffer *state) { uintptr_t ubuf = (uintptr_t)state->user_buffer; return renesas_sdhi_addr_aligned_gen(ubuf, state->len, state->len_aligned); } static int renesas_sdhi_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data) { struct bounce_buffer bbstate; unsigned int bbflags; bool bbok = false; size_t len; void *buf; int ret; if (data) { if (data->flags & MMC_DATA_READ) { buf = data->dest; bbflags = GEN_BB_WRITE; } else { buf = (void *)data->src; bbflags = GEN_BB_READ; } len = data->blocks * data->blocksize; ret = bounce_buffer_start_extalign(&bbstate, buf, len, bbflags, RENESAS_SDHI_DMA_ALIGNMENT, renesas_sdhi_addr_aligned); /* * If the amount of data to transfer is too large, we can get * -ENOMEM when starting the bounce buffer. If that happens, * fall back to PIO as it was before, otherwise use the BB. */ if (!ret) { bbok = true; if (data->flags & MMC_DATA_READ) data->dest = bbstate.bounce_buffer; else data->src = bbstate.bounce_buffer; } } ret = tmio_sd_send_cmd(dev, cmd, data); if (data && bbok) { buf = bbstate.user_buffer; bounce_buffer_stop(&bbstate); if (data->flags & MMC_DATA_READ) data->dest = buf; else data->src = buf; } if (ret) return ret; #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) struct tmio_sd_priv *priv = dev_get_priv(dev); renesas_sdhi_check_scc_error(dev); if (cmd->cmdidx == MMC_CMD_SEND_STATUS) renesas_sdhi_adjust_hs400_mode_enable(priv); #endif return 0; } int renesas_sdhi_get_b_max(struct udevice *dev, void *dst, lbaint_t blkcnt) { struct tmio_sd_priv *priv = dev_get_priv(dev); struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); struct mmc *mmc = upriv->mmc; size_t len = blkcnt * mmc->read_bl_len; size_t len_align = roundup(len, RENESAS_SDHI_DMA_ALIGNMENT); if (renesas_sdhi_addr_aligned_gen((uintptr_t)dst, len, len_align)) { if (priv->quirks & TMIO_SD_CAP_16BIT) return U16_MAX; else return U32_MAX; } else { return (CONFIG_SYS_MALLOC_LEN / 4) / mmc->read_bl_len; } } static const struct dm_mmc_ops renesas_sdhi_ops = { .send_cmd = renesas_sdhi_send_cmd, .set_ios = renesas_sdhi_set_ios, .get_cd = tmio_sd_get_cd, #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) .execute_tuning = renesas_sdhi_execute_tuning, #endif #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) .wait_dat0 = renesas_sdhi_wait_dat0, #endif .get_b_max = renesas_sdhi_get_b_max, }; #define RENESAS_GEN2_QUIRKS TMIO_SD_CAP_RCAR_GEN2 #define RENESAS_GEN3_QUIRKS \ TMIO_SD_CAP_64BIT | TMIO_SD_CAP_RCAR_GEN3 | TMIO_SD_CAP_RCAR_UHS static const struct udevice_id renesas_sdhi_match[] = { { .compatible = "renesas,sdhi-r8a7790", .data = RENESAS_GEN2_QUIRKS }, { .compatible = "renesas,sdhi-r8a7791", .data = RENESAS_GEN2_QUIRKS }, { .compatible = "renesas,sdhi-r8a7792", .data = RENESAS_GEN2_QUIRKS }, { .compatible = "renesas,sdhi-r8a7793", .data = RENESAS_GEN2_QUIRKS }, { .compatible = "renesas,sdhi-r8a7794", .data = RENESAS_GEN2_QUIRKS }, { .compatible = "renesas,sdhi-r8a7795", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,sdhi-r8a7796", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,sdhi-r8a77961", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,rcar-gen3-sdhi", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,sdhi-r8a77965", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,sdhi-r8a77970", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,sdhi-r8a77990", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,sdhi-r8a77995", .data = RENESAS_GEN3_QUIRKS }, { .compatible = "renesas,rcar-gen4-sdhi", .data = RENESAS_GEN3_QUIRKS }, { /* sentinel */ } }; static ulong renesas_sdhi_clk_get_rate(struct tmio_sd_priv *priv) { return clk_get_rate(&priv->clk); } static void renesas_sdhi_filter_caps(struct udevice *dev) { struct tmio_sd_priv *priv = dev_get_priv(dev); if (!(priv->caps & TMIO_SD_CAP_RCAR_GEN3)) return; if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL) priv->idma_bus_width = TMIO_SD_DMA_MODE_BUS_WIDTH; #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) struct tmio_sd_plat *plat = dev_get_plat(dev); /* HS400 is not supported on H3 ES1.x, M3W ES1.[012], V3M, V3H ES1.x, D3 */ if (((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7795) && (renesas_get_cpu_rev_integer() <= 1)) || ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7796) && (renesas_get_cpu_rev_integer() == 1) && (renesas_get_cpu_rev_fraction() <= 2)) || (renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77970) || ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77980) && (renesas_get_cpu_rev_integer() <= 1)) || (renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77995)) plat->cfg.host_caps &= ~MMC_MODE_HS400; /* H3 ES2.0, ES3.0 and M3W ES1.2 and M3N bad taps */ if (((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7795) && (renesas_get_cpu_rev_integer() >= 2)) || ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7796) && (renesas_get_cpu_rev_integer() == 1) && (renesas_get_cpu_rev_fraction() == 2)) || (renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77965)) priv->hs400_bad_tap = BIT(2) | BIT(3) | BIT(6) | BIT(7); /* M3W ES1.x for x>2 can use HS400 with manual adjustment and taps */ if ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7796) && (renesas_get_cpu_rev_integer() == 1) && (renesas_get_cpu_rev_fraction() > 2)) { priv->adjust_hs400_enable = true; priv->adjust_hs400_offset = 3; priv->hs400_bad_tap = BIT(1) | BIT(3) | BIT(5) | BIT(7); priv->adjust_hs400_calib_table = r8a7796_rev13_calib_table[!rcar_is_gen3_mmc0(priv)]; } /* M3W+ bad taps */ if ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7796) && (renesas_get_cpu_rev_integer() == 3)) priv->hs400_bad_tap = BIT(1) | BIT(3) | BIT(5) | BIT(7); /* M3N can use HS400 with manual adjustment */ if (renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77965) { priv->adjust_hs400_enable = true; priv->adjust_hs400_offset = 3; priv->adjust_hs400_calib_table = r8a77965_calib_table[!rcar_is_gen3_mmc0(priv)]; } /* E3 can use HS400 with manual adjustment */ if (renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77990) { priv->adjust_hs400_enable = true; priv->adjust_hs400_offset = 3; priv->adjust_hs400_calib_table = r8a77990_calib_table[!rcar_is_gen3_mmc0(priv)]; } /* H3 ES1.x, ES2.0 and M3W ES1.[0123] uses 4 tuning taps */ if (((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7795) && (renesas_get_cpu_rev_integer() <= 2)) || ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7796) && (renesas_get_cpu_rev_integer() == 1) && (renesas_get_cpu_rev_fraction() <= 3))) priv->nrtaps = 4; else priv->nrtaps = 8; #endif /* H3 ES1.x and M3W ES1.0 uses bit 17 for DTRAEND */ if (((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7795) && (renesas_get_cpu_rev_integer() <= 1)) || ((renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A7796) && (renesas_get_cpu_rev_integer() == 1) && (renesas_get_cpu_rev_fraction() == 0))) priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD; else priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD2; /* V3M handles SD0H differently than other Gen3 SoCs */ if (renesas_get_cpu_type() == RENESAS_CPU_TYPE_R8A77970) priv->needs_clkh_fallback = true; else priv->needs_clkh_fallback = false; } static int rzg2l_sdhi_setup(struct udevice *dev) { struct tmio_sd_priv *priv = dev_get_priv(dev); struct clk imclk2, aclk; struct reset_ctl rst; int ret; /* * On members of the RZ/G2L SoC family, we need to enable * additional chip detect and bus clocks, then release the SDHI * module from reset. */ ret = clk_get_by_name(dev, "cd", &imclk2); if (ret < 0) { dev_err(dev, "failed to get imclk2 (chip detect clk)\n"); return ret; } ret = clk_get_by_name(dev, "aclk", &aclk); if (ret < 0) { dev_err(dev, "failed to get aclk\n"); return ret; } ret = clk_enable(&imclk2); if (ret < 0) { dev_err(dev, "failed to enable imclk2 (chip detect clk)\n"); return ret; } ret = clk_enable(&aclk); if (ret < 0) { dev_err(dev, "failed to enable aclk\n"); goto err_aclk; } ret = reset_get_by_index(dev, 0, &rst); if (ret < 0) { dev_err(dev, "failed to get reset line\n"); goto err_get_reset; } ret = reset_deassert(&rst); if (ret < 0) { dev_err(dev, "failed to de-assert reset line\n"); goto err_reset; } ret = tmio_sd_probe(dev, priv->quirks); if (ret) goto err_tmio_probe; return 0; err_tmio_probe: reset_assert(&rst); err_reset: reset_free(&rst); err_get_reset: clk_disable(&aclk); err_aclk: clk_disable(&imclk2); return ret; } static int renesas_sdhi_probe(struct udevice *dev) { struct tmio_sd_priv *priv = dev_get_priv(dev); struct fdt_resource reg_res; DECLARE_GLOBAL_DATA_PTR; int ret; priv->clk_get_rate = renesas_sdhi_clk_get_rate; priv->quirks = dev_get_driver_data(dev); if (priv->quirks == RENESAS_GEN2_QUIRKS) { ret = fdt_get_resource(gd->fdt_blob, dev_of_offset(dev), "reg", 0, ®_res); if (ret < 0) { dev_err(dev, "\"reg\" resource not found, ret=%i\n", ret); return ret; } if (fdt_resource_size(®_res) == 0x100) priv->quirks |= TMIO_SD_CAP_16BIT; } ret = clk_get_by_index(dev, 0, &priv->clk); if (ret < 0) { dev_err(dev, "failed to get host clock\n"); return ret; } /* optional SDnH clock */ ret = clk_get_by_name(dev, "clkh", &priv->clkh); if (ret < 0) { dev_dbg(dev, "failed to get clkh\n"); } else { ret = clk_set_rate(&priv->clkh, 800000000); if (ret < 0) { dev_err(dev, "failed to set rate for SDnH clock (%d)\n", ret); return ret; } } /* set to max rate */ ret = clk_set_rate(&priv->clk, 200000000); if (ret < 0) { dev_err(dev, "failed to set rate for SDn clock (%d)\n", ret); return ret; } ret = clk_enable(&priv->clk); if (ret) { dev_err(dev, "failed to enable SDn clock (%d)\n", ret); return ret; } if (device_is_compatible(dev, "renesas,sdhi-r9a07g044")) ret = rzg2l_sdhi_setup(dev); else ret = tmio_sd_probe(dev, priv->quirks); if (ret) goto err_tmio_probe; renesas_sdhi_filter_caps(dev); #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) if (priv->caps & TMIO_SD_CAP_RCAR_UHS) renesas_sdhi_reset_tuning(priv, true); #endif return 0; err_tmio_probe: clk_disable(&priv->clk); return ret; } U_BOOT_DRIVER(renesas_sdhi) = { .name = "renesas-sdhi", .id = UCLASS_MMC, .of_match = renesas_sdhi_match, .bind = tmio_sd_bind, .probe = renesas_sdhi_probe, .priv_auto = sizeof(struct tmio_sd_priv), .plat_auto = sizeof(struct tmio_sd_plat), .ops = &renesas_sdhi_ops, };