// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc * Copyright 2019-2021 NXP * Andy Fleming * * Based vaguely on the pxa mmc code: * (C) Copyright 2003 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../../board/freescale/common/qixis.h" DECLARE_GLOBAL_DATA_PTR; struct fsl_esdhc { uint dsaddr; /* SDMA system address register */ uint blkattr; /* Block attributes register */ uint cmdarg; /* Command argument register */ uint xfertyp; /* Transfer type register */ uint cmdrsp0; /* Command response 0 register */ uint cmdrsp1; /* Command response 1 register */ uint cmdrsp2; /* Command response 2 register */ uint cmdrsp3; /* Command response 3 register */ uint datport; /* Buffer data port register */ uint prsstat; /* Present state register */ uint proctl; /* Protocol control register */ uint sysctl; /* System Control Register */ uint irqstat; /* Interrupt status register */ uint irqstaten; /* Interrupt status enable register */ uint irqsigen; /* Interrupt signal enable register */ uint autoc12err; /* Auto CMD error status register */ uint hostcapblt; /* Host controller capabilities register */ uint wml; /* Watermark level register */ char reserved1[8]; /* reserved */ uint fevt; /* Force event register */ uint admaes; /* ADMA error status register */ uint adsaddrl; /* ADMA system address low register */ uint adsaddrh; /* ADMA system address high register */ char reserved2[156]; uint hostver; /* Host controller version register */ char reserved3[4]; /* reserved */ uint dmaerraddr; /* DMA error address register */ char reserved4[4]; /* reserved */ uint dmaerrattr; /* DMA error attribute register */ char reserved5[4]; /* reserved */ uint hostcapblt2; /* Host controller capabilities register 2 */ char reserved6[8]; /* reserved */ uint tbctl; /* Tuning block control register */ char reserved7[32]; /* reserved */ uint sdclkctl; /* SD clock control register */ uint sdtimingctl; /* SD timing control register */ char reserved8[20]; /* reserved */ uint dllcfg0; /* DLL config 0 register */ uint dllcfg1; /* DLL config 1 register */ char reserved9[8]; /* reserved */ uint dllstat0; /* DLL status 0 register */ char reserved10[664];/* reserved */ uint esdhcctl; /* eSDHC control register */ }; struct fsl_esdhc_plat { struct mmc_config cfg; struct mmc mmc; }; /** * struct fsl_esdhc_priv * * @esdhc_regs: registers of the sdhc controller * @sdhc_clk: Current clk of the sdhc controller * @bus_width: bus width, 1bit, 4bit or 8bit * @cfg: mmc config * @mmc: mmc * Following is used when Driver Model is enabled for MMC * @dev: pointer for the device * @cd_gpio: gpio for card detection * @wp_gpio: gpio for write protection */ struct fsl_esdhc_priv { struct fsl_esdhc *esdhc_regs; unsigned int sdhc_clk; bool is_sdhc_per_clk; unsigned int clock; #if !CONFIG_IS_ENABLED(DM_MMC) struct mmc *mmc; #endif struct udevice *dev; struct sdhci_adma_desc *adma_desc_table; dma_addr_t dma_addr; }; /* Return the XFERTYP flags for a given command and data packet */ static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data) { uint xfertyp = 0; if (data) { xfertyp |= XFERTYP_DPSEL; if (!IS_ENABLED(CONFIG_SYS_FSL_ESDHC_USE_PIO) && cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK && cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200) xfertyp |= XFERTYP_DMAEN; if (data->blocks > 1) { xfertyp |= XFERTYP_MSBSEL; xfertyp |= XFERTYP_BCEN; if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC111)) xfertyp |= XFERTYP_AC12EN; } if (data->flags & MMC_DATA_READ) xfertyp |= XFERTYP_DTDSEL; } if (cmd->resp_type & MMC_RSP_CRC) xfertyp |= XFERTYP_CCCEN; if (cmd->resp_type & MMC_RSP_OPCODE) xfertyp |= XFERTYP_CICEN; if (cmd->resp_type & MMC_RSP_136) xfertyp |= XFERTYP_RSPTYP_136; else if (cmd->resp_type & MMC_RSP_BUSY) xfertyp |= XFERTYP_RSPTYP_48_BUSY; else if (cmd->resp_type & MMC_RSP_PRESENT) xfertyp |= XFERTYP_RSPTYP_48; if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION) xfertyp |= XFERTYP_CMDTYP_ABORT; return XFERTYP_CMD(cmd->cmdidx) | xfertyp; } /* * PIO Read/Write Mode reduce the performace as DMA is not used in this mode. */ static void esdhc_pio_read_write(struct fsl_esdhc_priv *priv, struct mmc_data *data) { struct fsl_esdhc *regs = priv->esdhc_regs; uint blocks; char *buffer; uint databuf; uint size; uint irqstat; ulong start; if (data->flags & MMC_DATA_READ) { blocks = data->blocks; buffer = data->dest; while (blocks) { start = get_timer(0); size = data->blocksize; irqstat = esdhc_read32(®s->irqstat); while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)) { if (get_timer(start) > PIO_TIMEOUT) { printf("\nData Read Failed in PIO Mode."); return; } } while (size && (!(irqstat & IRQSTAT_TC))) { udelay(100); /* Wait before last byte transfer complete */ irqstat = esdhc_read32(®s->irqstat); databuf = in_le32(®s->datport); *((uint *)buffer) = databuf; buffer += 4; size -= 4; } blocks--; } } else { blocks = data->blocks; buffer = (char *)data->src; while (blocks) { start = get_timer(0); size = data->blocksize; irqstat = esdhc_read32(®s->irqstat); while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)) { if (get_timer(start) > PIO_TIMEOUT) { printf("\nData Write Failed in PIO Mode."); return; } } while (size && (!(irqstat & IRQSTAT_TC))) { udelay(100); /* Wait before last byte transfer complete */ databuf = *((uint *)buffer); buffer += 4; size -= 4; irqstat = esdhc_read32(®s->irqstat); out_le32(®s->datport, databuf); } blocks--; } } } static void esdhc_setup_watermark_level(struct fsl_esdhc_priv *priv, struct mmc_data *data) { struct fsl_esdhc *regs = priv->esdhc_regs; uint wml_value = data->blocksize / 4; if (data->flags & MMC_DATA_READ) { if (wml_value > WML_RD_WML_MAX) wml_value = WML_RD_WML_MAX_VAL; esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value); } else { if (wml_value > WML_WR_WML_MAX) wml_value = WML_WR_WML_MAX_VAL; esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK, wml_value << 16); } } static void esdhc_setup_dma(struct fsl_esdhc_priv *priv, struct mmc_data *data) { uint trans_bytes = data->blocksize * data->blocks; struct fsl_esdhc *regs = priv->esdhc_regs; phys_addr_t adma_addr; void *buf; if (data->flags & MMC_DATA_WRITE) buf = (void *)data->src; else buf = data->dest; priv->dma_addr = dma_map_single(buf, trans_bytes, mmc_get_dma_dir(data)); if (IS_ENABLED(CONFIG_FSL_ESDHC_SUPPORT_ADMA2) && priv->adma_desc_table) { debug("Using ADMA2\n"); /* prefer ADMA2 if it is available */ sdhci_prepare_adma_table(priv->adma_desc_table, data, priv->dma_addr); adma_addr = virt_to_phys(priv->adma_desc_table); esdhc_write32(®s->adsaddrl, lower_32_bits(adma_addr)); if (IS_ENABLED(CONFIG_DMA_ADDR_T_64BIT)) esdhc_write32(®s->adsaddrh, upper_32_bits(adma_addr)); esdhc_clrsetbits32(®s->proctl, PROCTL_DMAS_MASK, PROCTL_DMAS_ADMA2); } else { debug("Using SDMA\n"); if (upper_32_bits(priv->dma_addr)) printf("Cannot use 64 bit addresses with SDMA\n"); esdhc_write32(®s->dsaddr, lower_32_bits(priv->dma_addr)); esdhc_clrsetbits32(®s->proctl, PROCTL_DMAS_MASK, PROCTL_DMAS_SDMA); } esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize); } static int esdhc_setup_data(struct fsl_esdhc_priv *priv, struct mmc *mmc, struct mmc_data *data) { int timeout; bool is_write = data->flags & MMC_DATA_WRITE; struct fsl_esdhc *regs = priv->esdhc_regs; if (is_write && !(esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL)) { printf("Can not write to locked SD card.\n"); return -EINVAL; } if (IS_ENABLED(CONFIG_SYS_FSL_ESDHC_USE_PIO)) esdhc_setup_watermark_level(priv, data); else esdhc_setup_dma(priv, data); /* Calculate the timeout period for data transactions */ /* * 1)Timeout period = (2^(timeout+13)) SD Clock cycles * 2)Timeout period should be minimum 0.250sec as per SD Card spec * So, Number of SD Clock cycles for 0.25sec should be minimum * (SD Clock/sec * 0.25 sec) SD Clock cycles * = (mmc->clock * 1/4) SD Clock cycles * As 1) >= 2) * => (2^(timeout+13)) >= mmc->clock * 1/4 * Taking log2 both the sides * => timeout + 13 >= log2(mmc->clock/4) * Rounding up to next power of 2 * => timeout + 13 = log2(mmc->clock/4) + 1 * => timeout + 13 = fls(mmc->clock/4) * * However, the MMC spec "It is strongly recommended for hosts to * implement more than 500ms timeout value even if the card * indicates the 250ms maximum busy length." Even the previous * value of 300ms is known to be insufficient for some cards. * So, we use * => timeout + 13 = fls(mmc->clock/2) */ timeout = fls(mmc->clock/2); timeout -= 13; if (timeout > 14) timeout = 14; if (timeout < 0) timeout = 0; if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC_A001) && (timeout == 4 || timeout == 8 || timeout == 12)) timeout++; if (IS_ENABLED(ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE)) timeout = 0xE; esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16); return 0; } /* * Sends a command out on the bus. Takes the mmc pointer, * a command pointer, and an optional data pointer. */ static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) { int err = 0; uint xfertyp; uint irqstat; u32 flags = IRQSTAT_CC | IRQSTAT_CTOE; struct fsl_esdhc *regs = priv->esdhc_regs; unsigned long start; if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC111) && cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION) return 0; esdhc_write32(®s->irqstat, -1); sync(); /* Wait for the bus to be idle */ while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) || (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB)) ; while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA) ; /* Set up for a data transfer if we have one */ if (data) { err = esdhc_setup_data(priv, mmc, data); if(err) return err; } /* Figure out the transfer arguments */ xfertyp = esdhc_xfertyp(cmd, data); /* Mask all irqs */ esdhc_write32(®s->irqsigen, 0); /* Send the command */ esdhc_write32(®s->cmdarg, cmd->cmdarg); esdhc_write32(®s->xfertyp, xfertyp); if (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK || cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200) flags = IRQSTAT_BRR; /* Wait for the command to complete */ start = get_timer(0); while (!(esdhc_read32(®s->irqstat) & flags)) { if (get_timer(start) > 1000) { err = -ETIMEDOUT; goto out; } } irqstat = esdhc_read32(®s->irqstat); if (irqstat & CMD_ERR) { err = -ECOMM; goto out; } if (irqstat & IRQSTAT_CTOE) { err = -ETIMEDOUT; goto out; } /* Workaround for ESDHC errata ENGcm03648 */ if (!data && (cmd->resp_type & MMC_RSP_BUSY)) { int timeout = 6000; /* Poll on DATA0 line for cmd with busy signal for 600 ms */ while (timeout > 0 && !(esdhc_read32(®s->prsstat) & PRSSTAT_DAT0)) { udelay(100); timeout--; } if (timeout <= 0) { printf("Timeout waiting for DAT0 to go high!\n"); err = -ETIMEDOUT; goto out; } } /* Copy the response to the response buffer */ if (cmd->resp_type & MMC_RSP_136) { u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0; cmdrsp3 = esdhc_read32(®s->cmdrsp3); cmdrsp2 = esdhc_read32(®s->cmdrsp2); cmdrsp1 = esdhc_read32(®s->cmdrsp1); cmdrsp0 = esdhc_read32(®s->cmdrsp0); cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24); cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24); cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24); cmd->response[3] = (cmdrsp0 << 8); } else cmd->response[0] = esdhc_read32(®s->cmdrsp0); /* Wait until all of the blocks are transferred */ if (data) { if (IS_ENABLED(CONFIG_SYS_FSL_ESDHC_USE_PIO)) { esdhc_pio_read_write(priv, data); } else { flags = DATA_COMPLETE; if (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK || cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200) flags = IRQSTAT_BRR; do { irqstat = esdhc_read32(®s->irqstat); if (irqstat & IRQSTAT_DTOE) { err = -ETIMEDOUT; goto out; } if (irqstat & DATA_ERR) { err = -ECOMM; goto out; } } while ((irqstat & flags) != flags); /* * Need invalidate the dcache here again to avoid any * cache-fill during the DMA operations such as the * speculative pre-fetching etc. */ dma_unmap_single(priv->dma_addr, data->blocks * data->blocksize, mmc_get_dma_dir(data)); } } out: /* Reset CMD and DATA portions on error */ if (err) { esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) | SYSCTL_RSTC); while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC) ; if (data) { esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) | SYSCTL_RSTD); while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD)) ; } } esdhc_write32(®s->irqstat, -1); return err; } static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock) { struct fsl_esdhc *regs = priv->esdhc_regs; int div = 1; int pre_div = 2; unsigned int sdhc_clk = priv->sdhc_clk; u32 time_out; u32 value; uint clk; u32 hostver; if (clock < mmc->cfg->f_min) clock = mmc->cfg->f_min; while (sdhc_clk / (16 * pre_div) > clock && pre_div < 256) pre_div *= 2; while (sdhc_clk / (div * pre_div) > clock && div < 16) div++; if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A011334) && clock == 200000000 && mmc->selected_mode == MMC_HS_400) { u32 div_ratio = pre_div * div; if (div_ratio <= 4) { pre_div = 4; div = 1; } else if (div_ratio <= 8) { pre_div = 4; div = 2; } else if (div_ratio <= 12) { pre_div = 4; div = 3; } else { printf("unsupported clock division.\n"); } } mmc->clock = sdhc_clk / pre_div / div; priv->clock = mmc->clock; pre_div >>= 1; div -= 1; clk = (pre_div << 8) | (div << 4); esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN); esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk); /* Only newer eSDHC controllers set PRSSTAT_SDSTB flag */ hostver = esdhc_read32(&priv->esdhc_regs->hostver); if (HOSTVER_VENDOR(hostver) <= VENDOR_V_22) { udelay(10000); esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_CKEN); return; } time_out = 20; value = PRSSTAT_SDSTB; while (!(esdhc_read32(®s->prsstat) & value)) { if (time_out == 0) { printf("fsl_esdhc: Internal clock never stabilised.\n"); break; } time_out--; mdelay(1); } esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_CKEN); } static void esdhc_clock_control(struct fsl_esdhc_priv *priv, bool enable) { struct fsl_esdhc *regs = priv->esdhc_regs; u32 value; u32 time_out; u32 hostver; value = esdhc_read32(®s->sysctl); if (enable) value |= SYSCTL_CKEN; else value &= ~SYSCTL_CKEN; esdhc_write32(®s->sysctl, value); /* Only newer eSDHC controllers set PRSSTAT_SDSTB flag */ hostver = esdhc_read32(&priv->esdhc_regs->hostver); if (HOSTVER_VENDOR(hostver) <= VENDOR_V_22) { udelay(10000); return; } time_out = 20; value = PRSSTAT_SDSTB; while (!(esdhc_read32(®s->prsstat) & value)) { if (time_out == 0) { printf("fsl_esdhc: Internal clock never stabilised.\n"); break; } time_out--; mdelay(1); } } static void esdhc_flush_async_fifo(struct fsl_esdhc_priv *priv) { struct fsl_esdhc *regs = priv->esdhc_regs; u32 time_out; esdhc_setbits32(®s->esdhcctl, ESDHCCTL_FAF); time_out = 20; while (esdhc_read32(®s->esdhcctl) & ESDHCCTL_FAF) { if (time_out == 0) { printf("fsl_esdhc: Flush asynchronous FIFO timeout.\n"); break; } time_out--; mdelay(1); } } static void esdhc_tuning_block_enable(struct fsl_esdhc_priv *priv, bool en) { struct fsl_esdhc *regs = priv->esdhc_regs; esdhc_clock_control(priv, false); esdhc_flush_async_fifo(priv); if (en) esdhc_setbits32(®s->tbctl, TBCTL_TB_EN); else esdhc_clrbits32(®s->tbctl, TBCTL_TB_EN); esdhc_clock_control(priv, true); } static void esdhc_exit_hs400(struct fsl_esdhc_priv *priv) { struct fsl_esdhc *regs = priv->esdhc_regs; esdhc_clrbits32(®s->sdtimingctl, FLW_CTL_BG); esdhc_clrbits32(®s->sdclkctl, CMD_CLK_CTL); esdhc_clock_control(priv, false); esdhc_clrbits32(®s->tbctl, HS400_MODE); esdhc_clock_control(priv, true); esdhc_clrbits32(®s->dllcfg0, DLL_FREQ_SEL | DLL_ENABLE); esdhc_clrbits32(®s->tbctl, HS400_WNDW_ADJUST); esdhc_tuning_block_enable(priv, false); } static int esdhc_set_timing(struct fsl_esdhc_priv *priv, enum bus_mode mode) { struct fsl_esdhc *regs = priv->esdhc_regs; ulong start; u32 val; /* Exit HS400 mode before setting any other mode */ if (esdhc_read32(®s->tbctl) & HS400_MODE && mode != MMC_HS_400) esdhc_exit_hs400(priv); esdhc_clock_control(priv, false); if (mode == MMC_HS_200) esdhc_clrsetbits32(®s->autoc12err, UHSM_MASK, UHSM_SDR104_HS200); if (mode == MMC_HS_400) { esdhc_setbits32(®s->tbctl, HS400_MODE); esdhc_setbits32(®s->sdclkctl, CMD_CLK_CTL); esdhc_clock_control(priv, true); if (priv->clock == 200000000) esdhc_setbits32(®s->dllcfg0, DLL_FREQ_SEL); esdhc_setbits32(®s->dllcfg0, DLL_ENABLE); esdhc_setbits32(®s->dllcfg0, DLL_RESET); udelay(1); esdhc_clrbits32(®s->dllcfg0, DLL_RESET); start = get_timer(0); val = DLL_STS_SLV_LOCK; while (!(esdhc_read32(®s->dllstat0) & val)) { if (get_timer(start) > 1000) { printf("fsl_esdhc: delay chain lock timeout\n"); return -ETIMEDOUT; } } esdhc_setbits32(®s->tbctl, HS400_WNDW_ADJUST); esdhc_clock_control(priv, false); esdhc_flush_async_fifo(priv); } esdhc_clock_control(priv, true); return 0; } static int esdhc_set_ios_common(struct fsl_esdhc_priv *priv, struct mmc *mmc) { struct fsl_esdhc *regs = priv->esdhc_regs; int ret; if (priv->is_sdhc_per_clk) { /* Select to use peripheral clock */ esdhc_clock_control(priv, false); esdhc_setbits32(®s->esdhcctl, ESDHCCTL_PCS); esdhc_clock_control(priv, true); } if (mmc->selected_mode == MMC_HS_400) esdhc_tuning_block_enable(priv, true); /* Set the clock speed */ if (priv->clock != mmc->clock) set_sysctl(priv, mmc, mmc->clock); /* Set timing */ ret = esdhc_set_timing(priv, mmc->selected_mode); if (ret) return ret; /* Set the bus width */ esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8); if (mmc->bus_width == 4) esdhc_setbits32(®s->proctl, PROCTL_DTW_4); else if (mmc->bus_width == 8) esdhc_setbits32(®s->proctl, PROCTL_DTW_8); return 0; } static void esdhc_enable_cache_snooping(struct fsl_esdhc *regs) { #ifdef CONFIG_ARCH_MPC830X immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; sysconf83xx_t *sysconf = &immr->sysconf; setbits_be32(&sysconf->sdhccr, 0x02000000); #else esdhc_write32(®s->esdhcctl, ESDHCCTL_SNOOP); #endif } static int esdhc_init_common(struct fsl_esdhc_priv *priv, struct mmc *mmc) { struct fsl_esdhc *regs = priv->esdhc_regs; ulong start; /* Reset the entire host controller */ esdhc_setbits32(®s->sysctl, SYSCTL_RSTA); /* Wait until the controller is available */ start = get_timer(0); while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA)) { if (get_timer(start) > 1000) return -ETIMEDOUT; } /* Clean TBCTL[TB_EN] which is not able to be reset by reset all */ esdhc_clrbits32(®s->tbctl, TBCTL_TB_EN); esdhc_enable_cache_snooping(regs); esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN); /* Set the initial clock speed */ set_sysctl(priv, mmc, 400000); /* Disable the BRR and BWR bits in IRQSTAT */ esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR); /* Put the PROCTL reg back to the default */ esdhc_write32(®s->proctl, PROCTL_INIT); /* Set timout to the maximum value */ esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16); if (IS_ENABLED(CONFIG_SYS_FSL_ESDHC_UNRELIABLE_PULSE_DETECTION_WORKAROUND)) esdhc_clrbits32(®s->dllcfg1, DLL_PD_PULSE_STRETCH_SEL); return 0; } static int esdhc_getcd_common(struct fsl_esdhc_priv *priv) { struct fsl_esdhc *regs = priv->esdhc_regs; #ifdef CONFIG_ESDHC_DETECT_QUIRK if (qixis_esdhc_detect_quirk()) return 1; #endif if (esdhc_read32(®s->prsstat) & PRSSTAT_CINS) return 1; return 0; } static void fsl_esdhc_get_cfg_common(struct fsl_esdhc_priv *priv, struct mmc_config *cfg) { struct fsl_esdhc *regs = priv->esdhc_regs; u32 caps; caps = esdhc_read32(®s->hostcapblt); /* * For eSDHC, power supply is through peripheral circuit. Some eSDHC * versions have value 0 of the bit but that does not reflect the * truth. 3.3V is common for SD/MMC, and is supported for all boards * with eSDHC in current u-boot. So, make 3.3V is supported in * default in code. CONFIG_FSL_ESDHC_VS33_NOT_SUPPORT can be enabled * if future board does not support 3.3V. */ caps |= HOSTCAPBLT_VS33; if (IS_ENABLED(CONFIG_FSL_ESDHC_VS33_NOT_SUPPORT)) caps &= ~HOSTCAPBLT_VS33; if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC135)) caps &= ~(HOSTCAPBLT_SRS | HOSTCAPBLT_VS18 | HOSTCAPBLT_VS30); if (caps & HOSTCAPBLT_VS18) cfg->voltages |= MMC_VDD_165_195; if (caps & HOSTCAPBLT_VS30) cfg->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31; if (caps & HOSTCAPBLT_VS33) cfg->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34; cfg->name = "FSL_SDHC"; if (caps & HOSTCAPBLT_HSS) cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; cfg->f_min = 400000; cfg->f_max = min(priv->sdhc_clk, (u32)200000000); cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; } #ifdef CONFIG_OF_LIBFDT __weak int esdhc_status_fixup(void *blob, const char *compat) { if (IS_ENABLED(CONFIG_FSL_ESDHC_PIN_MUX) && !hwconfig("esdhc")) { do_fixup_by_compat(blob, compat, "status", "disabled", sizeof("disabled"), 1); return 1; } return 0; } #if CONFIG_IS_ENABLED(DM_MMC) static int fsl_esdhc_get_cd(struct udevice *dev); static void esdhc_disable_for_no_card(void *blob) { struct udevice *dev; for (uclass_first_device(UCLASS_MMC, &dev); dev; uclass_next_device(&dev)) { char esdhc_path[50]; if (fsl_esdhc_get_cd(dev)) continue; snprintf(esdhc_path, sizeof(esdhc_path), "/soc/esdhc@%lx", (unsigned long)dev_read_addr(dev)); do_fixup_by_path(blob, esdhc_path, "status", "disabled", sizeof("disabled"), 1); } } #else static void esdhc_disable_for_no_card(void *blob) { } #endif void fdt_fixup_esdhc(void *blob, struct bd_info *bd) { const char *compat = "fsl,esdhc"; if (esdhc_status_fixup(blob, compat)) return; if (IS_ENABLED(CONFIG_FSL_ESDHC_33V_IO_RELIABILITY_WORKAROUND)) esdhc_disable_for_no_card(blob); do_fixup_by_compat_u32(blob, compat, "clock-frequency", gd->arch.sdhc_clk, 1); } #endif #if !CONFIG_IS_ENABLED(DM_MMC) static int esdhc_getcd(struct mmc *mmc) { struct fsl_esdhc_priv *priv = mmc->priv; return esdhc_getcd_common(priv); } static int esdhc_init(struct mmc *mmc) { struct fsl_esdhc_priv *priv = mmc->priv; return esdhc_init_common(priv, mmc); } static int esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) { struct fsl_esdhc_priv *priv = mmc->priv; return esdhc_send_cmd_common(priv, mmc, cmd, data); } static int esdhc_set_ios(struct mmc *mmc) { struct fsl_esdhc_priv *priv = mmc->priv; return esdhc_set_ios_common(priv, mmc); } static const struct mmc_ops esdhc_ops = { .getcd = esdhc_getcd, .init = esdhc_init, .send_cmd = esdhc_send_cmd, .set_ios = esdhc_set_ios, }; int fsl_esdhc_initialize(struct bd_info *bis, struct fsl_esdhc_cfg *cfg) { struct fsl_esdhc_plat *plat; struct fsl_esdhc_priv *priv; struct mmc_config *mmc_cfg; struct mmc *mmc; if (!cfg) return -EINVAL; priv = calloc(sizeof(struct fsl_esdhc_priv), 1); if (!priv) return -ENOMEM; plat = calloc(sizeof(struct fsl_esdhc_plat), 1); if (!plat) { free(priv); return -ENOMEM; } priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base); priv->sdhc_clk = cfg->sdhc_clk; if (gd->arch.sdhc_per_clk) priv->is_sdhc_per_clk = true; mmc_cfg = &plat->cfg; if (cfg->max_bus_width == 8) { mmc_cfg->host_caps |= MMC_MODE_1BIT | MMC_MODE_4BIT | MMC_MODE_8BIT; } else if (cfg->max_bus_width == 4) { mmc_cfg->host_caps |= MMC_MODE_1BIT | MMC_MODE_4BIT; } else if (cfg->max_bus_width == 1) { mmc_cfg->host_caps |= MMC_MODE_1BIT; } else { mmc_cfg->host_caps |= MMC_MODE_1BIT; printf("No max bus width provided. Fallback to 1-bit mode.\n"); } if (IS_ENABLED(CONFIG_ESDHC_DETECT_8_BIT_QUIRK)) mmc_cfg->host_caps &= ~MMC_MODE_8BIT; mmc_cfg->ops = &esdhc_ops; fsl_esdhc_get_cfg_common(priv, mmc_cfg); mmc = mmc_create(mmc_cfg, priv); if (!mmc) return -EIO; priv->mmc = mmc; return 0; } int fsl_esdhc_mmc_init(struct bd_info *bis) { struct fsl_esdhc_cfg *cfg; cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1); cfg->esdhc_base = CFG_SYS_FSL_ESDHC_ADDR; cfg->max_bus_width = CONFIG_SYS_FSL_ESDHC_DEFAULT_BUS_WIDTH; /* Prefer peripheral clock which provides higher frequency. */ if (gd->arch.sdhc_per_clk) cfg->sdhc_clk = gd->arch.sdhc_per_clk; else cfg->sdhc_clk = gd->arch.sdhc_clk; return fsl_esdhc_initialize(bis, cfg); } #else /* DM_MMC */ static int fsl_esdhc_probe(struct udevice *dev) { struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); struct fsl_esdhc_plat *plat = dev_get_plat(dev); struct fsl_esdhc_priv *priv = dev_get_priv(dev); u32 caps, hostver; fdt_addr_t addr; struct mmc *mmc; int ret; addr = dev_read_addr(dev); if (addr == FDT_ADDR_T_NONE) return -EINVAL; #ifdef CONFIG_PPC priv->esdhc_regs = (struct fsl_esdhc *)lower_32_bits(addr); #else priv->esdhc_regs = (struct fsl_esdhc *)addr; #endif priv->dev = dev; if (IS_ENABLED(CONFIG_FSL_ESDHC_SUPPORT_ADMA2)) { /* * Only newer eSDHC controllers can do ADMA2 if the ADMA flag * is set in the host capabilities register. */ caps = esdhc_read32(&priv->esdhc_regs->hostcapblt); hostver = esdhc_read32(&priv->esdhc_regs->hostver); if (caps & HOSTCAPBLT_DMAS && HOSTVER_VENDOR(hostver) > VENDOR_V_22) { priv->adma_desc_table = sdhci_adma_init(); if (!priv->adma_desc_table) debug("Could not allocate ADMA tables, falling back to SDMA\n"); } } if (gd->arch.sdhc_per_clk) { priv->sdhc_clk = gd->arch.sdhc_per_clk; priv->is_sdhc_per_clk = true; } else { priv->sdhc_clk = gd->arch.sdhc_clk; } if (priv->sdhc_clk <= 0) { dev_err(dev, "Unable to get clk for %s\n", dev->name); return -EINVAL; } fsl_esdhc_get_cfg_common(priv, &plat->cfg); mmc_of_parse(dev, &plat->cfg); mmc = &plat->mmc; mmc->cfg = &plat->cfg; mmc->dev = dev; upriv->mmc = mmc; ret = esdhc_init_common(priv, mmc); if (ret) return ret; if (IS_ENABLED(CONFIG_FSL_ESDHC_33V_IO_RELIABILITY_WORKAROUND) && !fsl_esdhc_get_cd(dev)) esdhc_setbits32(&priv->esdhc_regs->proctl, PROCTL_VOLT_SEL); return 0; } static int fsl_esdhc_get_cd(struct udevice *dev) { struct fsl_esdhc_plat *plat = dev_get_plat(dev); struct fsl_esdhc_priv *priv = dev_get_priv(dev); if (plat->cfg.host_caps & MMC_CAP_NONREMOVABLE) return 1; return esdhc_getcd_common(priv); } static int fsl_esdhc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data) { struct fsl_esdhc_plat *plat = dev_get_plat(dev); struct fsl_esdhc_priv *priv = dev_get_priv(dev); return esdhc_send_cmd_common(priv, &plat->mmc, cmd, data); } static int fsl_esdhc_set_ios(struct udevice *dev) { struct fsl_esdhc_plat *plat = dev_get_plat(dev); struct fsl_esdhc_priv *priv = dev_get_priv(dev); return esdhc_set_ios_common(priv, &plat->mmc); } static int fsl_esdhc_reinit(struct udevice *dev) { struct fsl_esdhc_plat *plat = dev_get_plat(dev); struct fsl_esdhc_priv *priv = dev_get_priv(dev); return esdhc_init_common(priv, &plat->mmc); } #ifdef MMC_SUPPORTS_TUNING static int fsl_esdhc_execute_tuning(struct udevice *dev, uint32_t opcode) { struct fsl_esdhc_plat *plat = dev_get_plat(dev); struct fsl_esdhc_priv *priv = dev_get_priv(dev); struct fsl_esdhc *regs = priv->esdhc_regs; struct mmc *mmc = &plat->mmc; u32 val, irqstaten; int i; if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A011334) && plat->mmc.hs400_tuning) set_sysctl(priv, mmc, mmc->clock); esdhc_tuning_block_enable(priv, true); esdhc_setbits32(®s->autoc12err, EXECUTE_TUNING); irqstaten = esdhc_read32(®s->irqstaten); esdhc_write32(®s->irqstaten, IRQSTATEN_BRR); for (i = 0; i < MAX_TUNING_LOOP; i++) { mmc_send_tuning(mmc, opcode, NULL); mdelay(1); val = esdhc_read32(®s->autoc12err); if (!(val & EXECUTE_TUNING)) { if (val & SMPCLKSEL) break; } } esdhc_write32(®s->irqstaten, irqstaten); if (i != MAX_TUNING_LOOP) { if (plat->mmc.hs400_tuning) esdhc_setbits32(®s->sdtimingctl, FLW_CTL_BG); return 0; } printf("fsl_esdhc: tuning failed!\n"); esdhc_clrbits32(®s->autoc12err, SMPCLKSEL); esdhc_clrbits32(®s->autoc12err, EXECUTE_TUNING); esdhc_tuning_block_enable(priv, false); return -ETIMEDOUT; } #endif int fsl_esdhc_hs400_prepare_ddr(struct udevice *dev) { struct fsl_esdhc_priv *priv = dev_get_priv(dev); esdhc_tuning_block_enable(priv, false); return 0; } static int fsl_esdhc_wait_dat0(struct udevice *dev, int state, int timeout_us) { int ret; u32 tmp; struct fsl_esdhc_priv *priv = dev_get_priv(dev); struct fsl_esdhc *regs = priv->esdhc_regs; ret = readx_poll_timeout(esdhc_read32, ®s->prsstat, tmp, !!(tmp & PRSSTAT_DAT0) == !!state, timeout_us); return ret; } static const struct dm_mmc_ops fsl_esdhc_ops = { .get_cd = fsl_esdhc_get_cd, .send_cmd = fsl_esdhc_send_cmd, .set_ios = fsl_esdhc_set_ios, #ifdef MMC_SUPPORTS_TUNING .execute_tuning = fsl_esdhc_execute_tuning, #endif .reinit = fsl_esdhc_reinit, .hs400_prepare_ddr = fsl_esdhc_hs400_prepare_ddr, .wait_dat0 = fsl_esdhc_wait_dat0, }; static const struct udevice_id fsl_esdhc_ids[] = { { .compatible = "fsl,esdhc", }, { /* sentinel */ } }; static int fsl_esdhc_bind(struct udevice *dev) { struct fsl_esdhc_plat *plat = dev_get_plat(dev); return mmc_bind(dev, &plat->mmc, &plat->cfg); } U_BOOT_DRIVER(fsl_esdhc) = { .name = "fsl-esdhc-mmc", .id = UCLASS_MMC, .of_match = fsl_esdhc_ids, .ops = &fsl_esdhc_ops, .bind = fsl_esdhc_bind, .probe = fsl_esdhc_probe, .plat_auto = sizeof(struct fsl_esdhc_plat), .priv_auto = sizeof(struct fsl_esdhc_priv), }; #endif