mirror of
https://github.com/AsahiLinux/u-boot
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ae7020b435
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.
This is also a fix-up for one previous patch, which converted
to use IS_ENABLED() for CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
that is not a Kconfig option.
Fixes: 52faec3182
("mmc: fsl_esdhc: replace most #ifdefs by IS_ENABLED()")
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
1181 lines
30 KiB
C
1181 lines
30 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
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* Copyright 2019-2021 NXP
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* Andy Fleming
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*
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* Based vaguely on the pxa mmc code:
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* (C) Copyright 2003
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* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
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*/
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#include <config.h>
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#include <common.h>
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#include <command.h>
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#include <cpu_func.h>
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#include <errno.h>
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#include <hwconfig.h>
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#include <mmc.h>
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#include <part.h>
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#include <malloc.h>
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#include <fsl_esdhc.h>
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#include <fdt_support.h>
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#include <asm/cache.h>
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#include <asm/global_data.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <sdhci.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct fsl_esdhc {
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uint dsaddr; /* SDMA system address register */
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uint blkattr; /* Block attributes register */
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uint cmdarg; /* Command argument register */
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uint xfertyp; /* Transfer type register */
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uint cmdrsp0; /* Command response 0 register */
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uint cmdrsp1; /* Command response 1 register */
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uint cmdrsp2; /* Command response 2 register */
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uint cmdrsp3; /* Command response 3 register */
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uint datport; /* Buffer data port register */
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uint prsstat; /* Present state register */
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uint proctl; /* Protocol control register */
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uint sysctl; /* System Control Register */
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uint irqstat; /* Interrupt status register */
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uint irqstaten; /* Interrupt status enable register */
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uint irqsigen; /* Interrupt signal enable register */
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uint autoc12err; /* Auto CMD error status register */
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uint hostcapblt; /* Host controller capabilities register */
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uint wml; /* Watermark level register */
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char reserved1[8]; /* reserved */
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uint fevt; /* Force event register */
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uint admaes; /* ADMA error status register */
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uint adsaddrl; /* ADMA system address low register */
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uint adsaddrh; /* ADMA system address high register */
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char reserved2[156];
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uint hostver; /* Host controller version register */
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char reserved3[4]; /* reserved */
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uint dmaerraddr; /* DMA error address register */
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char reserved4[4]; /* reserved */
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uint dmaerrattr; /* DMA error attribute register */
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char reserved5[4]; /* reserved */
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uint hostcapblt2; /* Host controller capabilities register 2 */
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char reserved6[8]; /* reserved */
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uint tbctl; /* Tuning block control register */
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char reserved7[32]; /* reserved */
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uint sdclkctl; /* SD clock control register */
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uint sdtimingctl; /* SD timing control register */
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char reserved8[20]; /* reserved */
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uint dllcfg0; /* DLL config 0 register */
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uint dllcfg1; /* DLL config 1 register */
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char reserved9[8]; /* reserved */
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uint dllstat0; /* DLL status 0 register */
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char reserved10[664];/* reserved */
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uint esdhcctl; /* eSDHC control register */
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};
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struct fsl_esdhc_plat {
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struct mmc_config cfg;
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struct mmc mmc;
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};
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/**
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* struct fsl_esdhc_priv
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*
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* @esdhc_regs: registers of the sdhc controller
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* @sdhc_clk: Current clk of the sdhc controller
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* @bus_width: bus width, 1bit, 4bit or 8bit
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* @cfg: mmc config
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* @mmc: mmc
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* Following is used when Driver Model is enabled for MMC
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* @dev: pointer for the device
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* @cd_gpio: gpio for card detection
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* @wp_gpio: gpio for write protection
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*/
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struct fsl_esdhc_priv {
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struct fsl_esdhc *esdhc_regs;
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unsigned int sdhc_clk;
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bool is_sdhc_per_clk;
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unsigned int clock;
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#if !CONFIG_IS_ENABLED(DM_MMC)
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struct mmc *mmc;
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#endif
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struct udevice *dev;
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struct sdhci_adma_desc *adma_desc_table;
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dma_addr_t dma_addr;
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};
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/* Return the XFERTYP flags for a given command and data packet */
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static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
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{
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uint xfertyp = 0;
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if (data) {
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xfertyp |= XFERTYP_DPSEL;
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if (!IS_ENABLED(CONFIG_SYS_FSL_ESDHC_USE_PIO) &&
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cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK &&
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cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200)
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xfertyp |= XFERTYP_DMAEN;
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if (data->blocks > 1) {
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xfertyp |= XFERTYP_MSBSEL;
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xfertyp |= XFERTYP_BCEN;
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if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC111))
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xfertyp |= XFERTYP_AC12EN;
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}
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if (data->flags & MMC_DATA_READ)
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xfertyp |= XFERTYP_DTDSEL;
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}
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if (cmd->resp_type & MMC_RSP_CRC)
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xfertyp |= XFERTYP_CCCEN;
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if (cmd->resp_type & MMC_RSP_OPCODE)
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xfertyp |= XFERTYP_CICEN;
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if (cmd->resp_type & MMC_RSP_136)
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xfertyp |= XFERTYP_RSPTYP_136;
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else if (cmd->resp_type & MMC_RSP_BUSY)
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xfertyp |= XFERTYP_RSPTYP_48_BUSY;
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else if (cmd->resp_type & MMC_RSP_PRESENT)
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xfertyp |= XFERTYP_RSPTYP_48;
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if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
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xfertyp |= XFERTYP_CMDTYP_ABORT;
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return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
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}
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/*
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* PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
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*/
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static void esdhc_pio_read_write(struct fsl_esdhc_priv *priv,
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struct mmc_data *data)
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{
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struct fsl_esdhc *regs = priv->esdhc_regs;
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uint blocks;
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char *buffer;
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uint databuf;
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uint size;
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uint irqstat;
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ulong start;
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if (data->flags & MMC_DATA_READ) {
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blocks = data->blocks;
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buffer = data->dest;
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while (blocks) {
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start = get_timer(0);
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size = data->blocksize;
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irqstat = esdhc_read32(®s->irqstat);
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while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN)) {
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if (get_timer(start) > PIO_TIMEOUT) {
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printf("\nData Read Failed in PIO Mode.");
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return;
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}
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}
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while (size && (!(irqstat & IRQSTAT_TC))) {
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udelay(100); /* Wait before last byte transfer complete */
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irqstat = esdhc_read32(®s->irqstat);
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databuf = in_le32(®s->datport);
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*((uint *)buffer) = databuf;
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buffer += 4;
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size -= 4;
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}
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blocks--;
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}
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} else {
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blocks = data->blocks;
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buffer = (char *)data->src;
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while (blocks) {
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start = get_timer(0);
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size = data->blocksize;
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irqstat = esdhc_read32(®s->irqstat);
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while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN)) {
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if (get_timer(start) > PIO_TIMEOUT) {
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printf("\nData Write Failed in PIO Mode.");
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return;
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}
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}
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while (size && (!(irqstat & IRQSTAT_TC))) {
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udelay(100); /* Wait before last byte transfer complete */
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databuf = *((uint *)buffer);
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buffer += 4;
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size -= 4;
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irqstat = esdhc_read32(®s->irqstat);
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out_le32(®s->datport, databuf);
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}
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blocks--;
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}
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}
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}
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static void esdhc_setup_watermark_level(struct fsl_esdhc_priv *priv,
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struct mmc_data *data)
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{
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struct fsl_esdhc *regs = priv->esdhc_regs;
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uint wml_value = data->blocksize / 4;
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if (data->flags & MMC_DATA_READ) {
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if (wml_value > WML_RD_WML_MAX)
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wml_value = WML_RD_WML_MAX_VAL;
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esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value);
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} else {
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if (wml_value > WML_WR_WML_MAX)
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wml_value = WML_WR_WML_MAX_VAL;
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esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK,
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wml_value << 16);
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}
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}
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static void esdhc_setup_dma(struct fsl_esdhc_priv *priv, struct mmc_data *data)
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{
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uint trans_bytes = data->blocksize * data->blocks;
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struct fsl_esdhc *regs = priv->esdhc_regs;
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phys_addr_t adma_addr;
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void *buf;
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if (data->flags & MMC_DATA_WRITE)
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buf = (void *)data->src;
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else
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buf = data->dest;
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priv->dma_addr = dma_map_single(buf, trans_bytes,
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mmc_get_dma_dir(data));
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if (IS_ENABLED(CONFIG_FSL_ESDHC_SUPPORT_ADMA2) &&
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priv->adma_desc_table) {
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debug("Using ADMA2\n");
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/* prefer ADMA2 if it is available */
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sdhci_prepare_adma_table(priv->adma_desc_table, data,
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priv->dma_addr);
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adma_addr = virt_to_phys(priv->adma_desc_table);
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esdhc_write32(®s->adsaddrl, lower_32_bits(adma_addr));
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if (IS_ENABLED(CONFIG_DMA_ADDR_T_64BIT))
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esdhc_write32(®s->adsaddrh, upper_32_bits(adma_addr));
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esdhc_clrsetbits32(®s->proctl, PROCTL_DMAS_MASK,
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PROCTL_DMAS_ADMA2);
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} else {
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debug("Using SDMA\n");
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if (upper_32_bits(priv->dma_addr))
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printf("Cannot use 64 bit addresses with SDMA\n");
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esdhc_write32(®s->dsaddr, lower_32_bits(priv->dma_addr));
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esdhc_clrsetbits32(®s->proctl, PROCTL_DMAS_MASK,
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PROCTL_DMAS_SDMA);
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}
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esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize);
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}
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static int esdhc_setup_data(struct fsl_esdhc_priv *priv, struct mmc *mmc,
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struct mmc_data *data)
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{
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int timeout;
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bool is_write = data->flags & MMC_DATA_WRITE;
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struct fsl_esdhc *regs = priv->esdhc_regs;
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if (is_write && !(esdhc_read32(®s->prsstat) & PRSSTAT_WPSPL)) {
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printf("Can not write to locked SD card.\n");
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return -EINVAL;
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}
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if (IS_ENABLED(CONFIG_SYS_FSL_ESDHC_USE_PIO))
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esdhc_setup_watermark_level(priv, data);
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else
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esdhc_setup_dma(priv, data);
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/* Calculate the timeout period for data transactions */
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/*
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* 1)Timeout period = (2^(timeout+13)) SD Clock cycles
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* 2)Timeout period should be minimum 0.250sec as per SD Card spec
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* So, Number of SD Clock cycles for 0.25sec should be minimum
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* (SD Clock/sec * 0.25 sec) SD Clock cycles
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* = (mmc->clock * 1/4) SD Clock cycles
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* As 1) >= 2)
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* => (2^(timeout+13)) >= mmc->clock * 1/4
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* Taking log2 both the sides
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* => timeout + 13 >= log2(mmc->clock/4)
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* Rounding up to next power of 2
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* => timeout + 13 = log2(mmc->clock/4) + 1
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* => timeout + 13 = fls(mmc->clock/4)
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*
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* However, the MMC spec "It is strongly recommended for hosts to
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* implement more than 500ms timeout value even if the card
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* indicates the 250ms maximum busy length." Even the previous
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* value of 300ms is known to be insufficient for some cards.
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* So, we use
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* => timeout + 13 = fls(mmc->clock/2)
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*/
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timeout = fls(mmc->clock/2);
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timeout -= 13;
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if (timeout > 14)
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timeout = 14;
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if (timeout < 0)
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timeout = 0;
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if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC_A001) &&
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(timeout == 4 || timeout == 8 || timeout == 12))
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timeout++;
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if (IS_ENABLED(ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE))
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timeout = 0xE;
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esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
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return 0;
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}
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/*
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* Sends a command out on the bus. Takes the mmc pointer,
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* a command pointer, and an optional data pointer.
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*/
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static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct mmc *mmc,
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struct mmc_cmd *cmd, struct mmc_data *data)
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{
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int err = 0;
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uint xfertyp;
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uint irqstat;
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u32 flags = IRQSTAT_CC | IRQSTAT_CTOE;
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struct fsl_esdhc *regs = priv->esdhc_regs;
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unsigned long start;
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if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC111) &&
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cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
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return 0;
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esdhc_write32(®s->irqstat, -1);
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sync();
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/* Wait for the bus to be idle */
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while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) ||
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(esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB))
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;
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while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA)
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;
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/* Wait at least 8 SD clock cycles before the next command */
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/*
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* Note: This is way more than 8 cycles, but 1ms seems to
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* resolve timing issues with some cards
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*/
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udelay(1000);
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/* Set up for a data transfer if we have one */
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if (data) {
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err = esdhc_setup_data(priv, mmc, data);
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if(err)
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return err;
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}
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/* Figure out the transfer arguments */
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xfertyp = esdhc_xfertyp(cmd, data);
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/* Mask all irqs */
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esdhc_write32(®s->irqsigen, 0);
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/* Send the command */
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esdhc_write32(®s->cmdarg, cmd->cmdarg);
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esdhc_write32(®s->xfertyp, xfertyp);
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if (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
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cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)
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flags = IRQSTAT_BRR;
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/* Wait for the command to complete */
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start = get_timer(0);
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while (!(esdhc_read32(®s->irqstat) & flags)) {
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if (get_timer(start) > 1000) {
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err = -ETIMEDOUT;
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goto out;
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}
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}
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irqstat = esdhc_read32(®s->irqstat);
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if (irqstat & CMD_ERR) {
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err = -ECOMM;
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goto out;
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}
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if (irqstat & IRQSTAT_CTOE) {
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err = -ETIMEDOUT;
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goto out;
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}
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/* Workaround for ESDHC errata ENGcm03648 */
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if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
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int timeout = 6000;
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/* Poll on DATA0 line for cmd with busy signal for 600 ms */
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while (timeout > 0 && !(esdhc_read32(®s->prsstat) &
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PRSSTAT_DAT0)) {
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udelay(100);
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timeout--;
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}
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if (timeout <= 0) {
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printf("Timeout waiting for DAT0 to go high!\n");
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err = -ETIMEDOUT;
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goto out;
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}
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}
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|
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/* Copy the response to the response buffer */
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if (cmd->resp_type & MMC_RSP_136) {
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u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
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cmdrsp3 = esdhc_read32(®s->cmdrsp3);
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cmdrsp2 = esdhc_read32(®s->cmdrsp2);
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cmdrsp1 = esdhc_read32(®s->cmdrsp1);
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cmdrsp0 = esdhc_read32(®s->cmdrsp0);
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cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
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cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
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cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
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cmd->response[3] = (cmdrsp0 << 8);
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} else
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cmd->response[0] = esdhc_read32(®s->cmdrsp0);
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/* Wait until all of the blocks are transferred */
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if (data) {
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if (IS_ENABLED(CONFIG_SYS_FSL_ESDHC_USE_PIO)) {
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esdhc_pio_read_write(priv, data);
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} else {
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flags = DATA_COMPLETE;
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if (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
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cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)
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flags = IRQSTAT_BRR;
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do {
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irqstat = esdhc_read32(®s->irqstat);
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|
|
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;
|
|
|
|
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);
|
|
|
|
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;
|
|
|
|
value = esdhc_read32(®s->sysctl);
|
|
|
|
if (enable)
|
|
value |= SYSCTL_CKEN;
|
|
else
|
|
value &= ~SYSCTL_CKEN;
|
|
|
|
esdhc_write32(®s->sysctl, value);
|
|
|
|
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, 0x00000040);
|
|
#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 (CONFIG_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 | MMC_MODE_4BIT |
|
|
MMC_MODE_8BIT;
|
|
printf("No max bus width provided. Assume 8-bit supported.\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 = CONFIG_SYS_FSL_ESDHC_ADDR;
|
|
/* 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 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,
|
|
};
|
|
|
|
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
|