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* Copyright (C) 2010 Renesas Solutions Corp.
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* Yusuke Goda <yusuke.goda.sx@renesas.com>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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* 3. Handle MMC errors better
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#include <linux/clk.h>
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/core.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/sdio.h>
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#include <linux/mmc/sh_mmcif.h>
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#include <linux/pagemap.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#define DRIVER_NAME "sh_mmcif"
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#define DRIVER_VERSION "2010-04-28"
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#define CMD_MASK 0x3f000000
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#define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22))
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#define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */
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#define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */
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#define CMD_SET_RBSY (1 << 21) /* R1b */
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#define CMD_SET_CCSEN (1 << 20)
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#define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */
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#define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */
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#define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */
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#define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */
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#define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */
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#define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */
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#define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */
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#define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/
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#define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/
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#define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/
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#define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/
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#define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */
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#define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */
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#define CMD_SET_OPDM (1 << 6) /* 1: open/drain */
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#define CMD_SET_CCSH (1 << 5)
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#define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */
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#define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */
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#define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */
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#define CMD_CTRL_BREAK (1 << 0)
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#define BLOCK_SIZE_MASK 0x0000ffff
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#define INT_CCSDE (1 << 29)
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#define INT_CMD12DRE (1 << 26)
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#define INT_CMD12RBE (1 << 25)
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#define INT_CMD12CRE (1 << 24)
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#define INT_DTRANE (1 << 23)
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#define INT_BUFRE (1 << 22)
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#define INT_BUFWEN (1 << 21)
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#define INT_BUFREN (1 << 20)
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#define INT_CCSRCV (1 << 19)
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#define INT_RBSYE (1 << 17)
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#define INT_CRSPE (1 << 16)
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#define INT_CMDVIO (1 << 15)
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#define INT_BUFVIO (1 << 14)
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#define INT_WDATERR (1 << 11)
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#define INT_RDATERR (1 << 10)
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#define INT_RIDXERR (1 << 9)
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#define INT_RSPERR (1 << 8)
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#define INT_CCSTO (1 << 5)
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#define INT_CRCSTO (1 << 4)
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#define INT_WDATTO (1 << 3)
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#define INT_RDATTO (1 << 2)
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#define INT_RBSYTO (1 << 1)
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#define INT_RSPTO (1 << 0)
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#define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \
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INT_RDATERR | INT_RIDXERR | INT_RSPERR | \
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INT_CCSTO | INT_CRCSTO | INT_WDATTO | \
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INT_RDATTO | INT_RBSYTO | INT_RSPTO)
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#define MASK_ALL 0x00000000
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#define MASK_MCCSDE (1 << 29)
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#define MASK_MCMD12DRE (1 << 26)
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#define MASK_MCMD12RBE (1 << 25)
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#define MASK_MCMD12CRE (1 << 24)
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#define MASK_MDTRANE (1 << 23)
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#define MASK_MBUFRE (1 << 22)
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#define MASK_MBUFWEN (1 << 21)
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#define MASK_MBUFREN (1 << 20)
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#define MASK_MCCSRCV (1 << 19)
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#define MASK_MRBSYE (1 << 17)
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#define MASK_MCRSPE (1 << 16)
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#define MASK_MCMDVIO (1 << 15)
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#define MASK_MBUFVIO (1 << 14)
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#define MASK_MWDATERR (1 << 11)
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#define MASK_MRDATERR (1 << 10)
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#define MASK_MRIDXERR (1 << 9)
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#define MASK_MRSPERR (1 << 8)
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#define MASK_MCCSTO (1 << 5)
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#define MASK_MCRCSTO (1 << 4)
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#define MASK_MWDATTO (1 << 3)
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#define MASK_MRDATTO (1 << 2)
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#define MASK_MRBSYTO (1 << 1)
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#define MASK_MRSPTO (1 << 0)
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#define STS1_CMDSEQ (1 << 31)
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#define STS2_CRCSTE (1 << 31)
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#define STS2_CRC16E (1 << 30)
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#define STS2_AC12CRCE (1 << 29)
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#define STS2_RSPCRC7E (1 << 28)
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#define STS2_CRCSTEBE (1 << 27)
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#define STS2_RDATEBE (1 << 26)
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#define STS2_AC12REBE (1 << 25)
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#define STS2_RSPEBE (1 << 24)
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#define STS2_AC12IDXE (1 << 23)
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#define STS2_RSPIDXE (1 << 22)
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#define STS2_CCSTO (1 << 15)
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#define STS2_RDATTO (1 << 14)
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#define STS2_DATBSYTO (1 << 13)
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#define STS2_CRCSTTO (1 << 12)
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#define STS2_AC12BSYTO (1 << 11)
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#define STS2_RSPBSYTO (1 << 10)
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#define STS2_AC12RSPTO (1 << 9)
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#define STS2_RSPTO (1 << 8)
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#define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \
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STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE)
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#define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \
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STS2_DATBSYTO | STS2_CRCSTTO | \
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STS2_AC12BSYTO | STS2_RSPBSYTO | \
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STS2_AC12RSPTO | STS2_RSPTO)
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#define CLKDEV_EMMC_DATA 52000000 /* 52MHz */
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#define CLKDEV_MMC_DATA 20000000 /* 20MHz */
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#define CLKDEV_INIT 400000 /* 400 KHz */
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struct sh_mmcif_host {
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struct mmc_host *mmc;
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struct mmc_data *data;
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struct platform_device *pd;
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struct sh_dmae_slave dma_slave_tx;
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struct sh_dmae_slave dma_slave_rx;
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struct completion intr_wait;
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enum mmcif_state state;
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struct dma_chan *chan_rx;
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struct dma_chan *chan_tx;
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struct completion dma_complete;
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static inline void sh_mmcif_bitset(struct sh_mmcif_host *host,
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unsigned int reg, u32 val)
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writel(val | readl(host->addr + reg), host->addr + reg);
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static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
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unsigned int reg, u32 val)
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writel(~val & readl(host->addr + reg), host->addr + reg);
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static void mmcif_dma_complete(void *arg)
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struct sh_mmcif_host *host = arg;
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dev_dbg(&host->pd->dev, "Command completed\n");
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if (WARN(!host->data, "%s: NULL data in DMA completion!\n",
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dev_name(&host->pd->dev)))
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if (host->data->flags & MMC_DATA_READ)
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dma_unmap_sg(host->chan_rx->device->dev,
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host->data->sg, host->data->sg_len,
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dma_unmap_sg(host->chan_tx->device->dev,
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host->data->sg, host->data->sg_len,
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complete(&host->dma_complete);
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static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
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struct scatterlist *sg = host->data->sg;
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struct dma_async_tx_descriptor *desc = NULL;
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struct dma_chan *chan = host->chan_rx;
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dma_cookie_t cookie = -EINVAL;
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ret = dma_map_sg(chan->device->dev, sg, host->data->sg_len,
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host->dma_active = true;
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desc = chan->device->device_prep_slave_sg(chan, sg, ret,
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DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
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desc->callback = mmcif_dma_complete;
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desc->callback_param = host;
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cookie = dmaengine_submit(desc);
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sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN);
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dma_async_issue_pending(chan);
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dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n",
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__func__, host->data->sg_len, ret, cookie);
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/* DMA failed, fall back to PIO */
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host->chan_rx = NULL;
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host->dma_active = false;
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dma_release_channel(chan);
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/* Free the Tx channel too */
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chan = host->chan_tx;
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host->chan_tx = NULL;
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dma_release_channel(chan);
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dev_warn(&host->pd->dev,
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"DMA failed: %d, falling back to PIO\n", ret);
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sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
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dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
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desc, cookie, host->data->sg_len);
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static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
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struct scatterlist *sg = host->data->sg;
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struct dma_async_tx_descriptor *desc = NULL;
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struct dma_chan *chan = host->chan_tx;
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dma_cookie_t cookie = -EINVAL;
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ret = dma_map_sg(chan->device->dev, sg, host->data->sg_len,
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host->dma_active = true;
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desc = chan->device->device_prep_slave_sg(chan, sg, ret,
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DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
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desc->callback = mmcif_dma_complete;
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desc->callback_param = host;
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cookie = dmaengine_submit(desc);
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sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAWEN);
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dma_async_issue_pending(chan);
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dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n",
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__func__, host->data->sg_len, ret, cookie);
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/* DMA failed, fall back to PIO */
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host->chan_tx = NULL;
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host->dma_active = false;
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dma_release_channel(chan);
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/* Free the Rx channel too */
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chan = host->chan_rx;
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host->chan_rx = NULL;
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dma_release_channel(chan);
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dev_warn(&host->pd->dev,
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"DMA failed: %d, falling back to PIO\n", ret);
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sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
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dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d\n", __func__,
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static bool sh_mmcif_filter(struct dma_chan *chan, void *arg)
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dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg);
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static void sh_mmcif_request_dma(struct sh_mmcif_host *host,
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struct sh_mmcif_plat_data *pdata)
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struct sh_dmae_slave *tx, *rx;
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host->dma_active = false;
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/* We can only either use DMA for both Tx and Rx or not use it at all */
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dev_warn(&host->pd->dev,
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"Update your platform to use embedded DMA slave IDs\n");
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tx = &pdata->dma->chan_priv_tx;
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rx = &pdata->dma->chan_priv_rx;
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tx = &host->dma_slave_tx;
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tx->slave_id = pdata->slave_id_tx;
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rx = &host->dma_slave_rx;
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rx->slave_id = pdata->slave_id_rx;
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if (tx->slave_id > 0 && rx->slave_id > 0) {
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dma_cap_set(DMA_SLAVE, mask);
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host->chan_tx = dma_request_channel(mask, sh_mmcif_filter, tx);
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dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
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host->chan_rx = dma_request_channel(mask, sh_mmcif_filter, rx);
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dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
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if (!host->chan_rx) {
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dma_release_channel(host->chan_tx);
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host->chan_tx = NULL;
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init_completion(&host->dma_complete);
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static void sh_mmcif_release_dma(struct sh_mmcif_host *host)
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sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
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/* Descriptors are freed automatically */
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struct dma_chan *chan = host->chan_tx;
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host->chan_tx = NULL;
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dma_release_channel(chan);
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struct dma_chan *chan = host->chan_rx;
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host->chan_rx = NULL;
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dma_release_channel(chan);
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host->dma_active = false;
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static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
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struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
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sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
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sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR);
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if (p->sup_pclk && clk == host->clk)
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sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
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sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
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(ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16));
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sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
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static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
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tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL);
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sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON);
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sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF);
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sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp |
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SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
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sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
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static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
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int ret, timeout = 10000000;
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host->sd_error = false;
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state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1);
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state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2);
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dev_dbg(&host->pd->dev, "ERR HOST_STS1 = %08x\n", state1);
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dev_dbg(&host->pd->dev, "ERR HOST_STS2 = %08x\n", state2);
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if (state1 & STS1_CMDSEQ) {
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sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
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sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK);
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dev_err(&host->pd->dev,
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"Forceed end of command sequence timeout err\n");
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if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1)
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sh_mmcif_sync_reset(host);
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dev_dbg(&host->pd->dev, "Forced end of command sequence\n");
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if (state2 & STS2_CRC_ERR) {
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dev_dbg(&host->pd->dev, ": Happened CRC error\n");
456
} else if (state2 & STS2_TIMEOUT_ERR) {
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dev_dbg(&host->pd->dev, ": Happened Timeout error\n");
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dev_dbg(&host->pd->dev, ": Happened End/Index error\n");
466
static int sh_mmcif_single_read(struct sh_mmcif_host *host,
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struct mmc_request *mrq)
469
struct mmc_data *data = mrq->data;
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u32 blocksize, i, *p = sg_virt(data->sg);
473
/* buf read enable */
474
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
475
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
477
if (time <= 0 || host->sd_error)
478
return sh_mmcif_error_manage(host);
480
blocksize = (BLOCK_SIZE_MASK &
481
sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
482
for (i = 0; i < blocksize / 4; i++)
483
*p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
485
/* buffer read end */
486
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
487
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
489
if (time <= 0 || host->sd_error)
490
return sh_mmcif_error_manage(host);
495
static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
496
struct mmc_request *mrq)
498
struct mmc_data *data = mrq->data;
500
u32 blocksize, i, j, sec, *p;
502
blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
504
for (j = 0; j < data->sg_len; j++) {
505
p = sg_virt(data->sg);
506
for (sec = 0; sec < data->sg->length / blocksize; sec++) {
507
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
508
/* buf read enable */
509
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
512
if (time <= 0 || host->sd_error)
513
return sh_mmcif_error_manage(host);
515
for (i = 0; i < blocksize / 4; i++)
516
*p++ = sh_mmcif_readl(host->addr,
519
if (j < data->sg_len - 1)
525
static int sh_mmcif_single_write(struct sh_mmcif_host *host,
526
struct mmc_request *mrq)
528
struct mmc_data *data = mrq->data;
530
u32 blocksize, i, *p = sg_virt(data->sg);
532
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
534
/* buf write enable */
535
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
537
if (time <= 0 || host->sd_error)
538
return sh_mmcif_error_manage(host);
540
blocksize = (BLOCK_SIZE_MASK &
541
sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
542
for (i = 0; i < blocksize / 4; i++)
543
sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
545
/* buffer write end */
546
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
548
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
550
if (time <= 0 || host->sd_error)
551
return sh_mmcif_error_manage(host);
556
static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
557
struct mmc_request *mrq)
559
struct mmc_data *data = mrq->data;
561
u32 i, sec, j, blocksize, *p;
563
blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
566
for (j = 0; j < data->sg_len; j++) {
567
p = sg_virt(data->sg);
568
for (sec = 0; sec < data->sg->length / blocksize; sec++) {
569
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
570
/* buf write enable*/
571
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
574
if (time <= 0 || host->sd_error)
575
return sh_mmcif_error_manage(host);
577
for (i = 0; i < blocksize / 4; i++)
578
sh_mmcif_writel(host->addr,
579
MMCIF_CE_DATA, *p++);
581
if (j < data->sg_len - 1)
587
static void sh_mmcif_get_response(struct sh_mmcif_host *host,
588
struct mmc_command *cmd)
590
if (cmd->flags & MMC_RSP_136) {
591
cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3);
592
cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2);
593
cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1);
594
cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
596
cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
599
static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
600
struct mmc_command *cmd)
602
cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12);
605
static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
606
struct mmc_request *mrq, struct mmc_command *cmd, u32 opc)
610
/* Response Type check */
611
switch (mmc_resp_type(cmd)) {
613
tmp |= CMD_SET_RTYP_NO;
618
tmp |= CMD_SET_RTYP_6B;
621
tmp |= CMD_SET_RTYP_17B;
624
dev_err(&host->pd->dev, "Unsupported response type.\n");
630
case MMC_STOP_TRANSMISSION:
631
case MMC_SET_WRITE_PROT:
632
case MMC_CLR_WRITE_PROT:
641
switch (host->bus_width) {
642
case MMC_BUS_WIDTH_1:
643
tmp |= CMD_SET_DATW_1;
645
case MMC_BUS_WIDTH_4:
646
tmp |= CMD_SET_DATW_4;
648
case MMC_BUS_WIDTH_8:
649
tmp |= CMD_SET_DATW_8;
652
dev_err(&host->pd->dev, "Unsupported bus width.\n");
657
if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK)
660
if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) {
661
tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
662
sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET,
663
mrq->data->blocks << 16);
665
/* RIDXC[1:0] check bits */
666
if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID ||
667
opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
668
tmp |= CMD_SET_RIDXC_BITS;
669
/* RCRC7C[1:0] check bits */
670
if (opc == MMC_SEND_OP_COND)
671
tmp |= CMD_SET_CRC7C_BITS;
672
/* RCRC7C[1:0] internal CRC7 */
673
if (opc == MMC_ALL_SEND_CID ||
674
opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
675
tmp |= CMD_SET_CRC7C_INTERNAL;
677
return opc = ((opc << 24) | tmp);
680
static int sh_mmcif_data_trans(struct sh_mmcif_host *host,
681
struct mmc_request *mrq, u32 opc)
686
case MMC_READ_MULTIPLE_BLOCK:
687
ret = sh_mmcif_multi_read(host, mrq);
689
case MMC_WRITE_MULTIPLE_BLOCK:
690
ret = sh_mmcif_multi_write(host, mrq);
692
case MMC_WRITE_BLOCK:
693
ret = sh_mmcif_single_write(host, mrq);
695
case MMC_READ_SINGLE_BLOCK:
696
case MMC_SEND_EXT_CSD:
697
ret = sh_mmcif_single_read(host, mrq);
700
dev_err(&host->pd->dev, "UNSUPPORTED CMD = d'%08d\n", opc);
707
static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
708
struct mmc_request *mrq, struct mmc_command *cmd)
711
int ret = 0, mask = 0;
712
u32 opc = cmd->opcode;
715
/* respons busy check */
717
case MMC_STOP_TRANSMISSION:
718
case MMC_SET_WRITE_PROT:
719
case MMC_CLR_WRITE_PROT:
728
mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
729
MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
730
MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
731
MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
734
sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0);
735
sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET,
738
opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);
740
sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0);
741
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask);
743
sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg);
745
sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc);
747
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
750
cmd->error = sh_mmcif_error_manage(host);
753
if (host->sd_error) {
754
switch (cmd->opcode) {
755
case MMC_ALL_SEND_CID:
756
case MMC_SELECT_CARD:
758
cmd->error = -ETIMEDOUT;
761
dev_dbg(&host->pd->dev, "Cmd(d'%d) err\n",
763
cmd->error = sh_mmcif_error_manage(host);
766
host->sd_error = false;
769
if (!(cmd->flags & MMC_RSP_PRESENT)) {
773
sh_mmcif_get_response(host, cmd);
775
if (!host->dma_active) {
776
ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
779
wait_for_completion_interruptible_timeout(&host->dma_complete,
785
sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
786
BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
787
host->dma_active = false;
790
mrq->data->bytes_xfered = 0;
792
mrq->data->bytes_xfered =
793
mrq->data->blocks * mrq->data->blksz;
798
static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
799
struct mmc_request *mrq, struct mmc_command *cmd)
803
if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
804
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
805
else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
806
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
808
dev_err(&host->pd->dev, "unsupported stop cmd\n");
809
cmd->error = sh_mmcif_error_manage(host);
813
time = wait_for_completion_interruptible_timeout(&host->intr_wait,
815
if (time <= 0 || host->sd_error) {
816
cmd->error = sh_mmcif_error_manage(host);
819
sh_mmcif_get_cmd12response(host, cmd);
823
static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
825
struct sh_mmcif_host *host = mmc_priv(mmc);
828
spin_lock_irqsave(&host->lock, flags);
829
if (host->state != STATE_IDLE) {
830
spin_unlock_irqrestore(&host->lock, flags);
831
mrq->cmd->error = -EAGAIN;
832
mmc_request_done(mmc, mrq);
836
host->state = STATE_REQUEST;
837
spin_unlock_irqrestore(&host->lock, flags);
839
switch (mrq->cmd->opcode) {
840
/* MMCIF does not support SD/SDIO command */
841
case SD_IO_SEND_OP_COND:
843
host->state = STATE_IDLE;
844
mrq->cmd->error = -ETIMEDOUT;
845
mmc_request_done(mmc, mrq);
847
case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
849
/* send_if_cond cmd (not support) */
850
host->state = STATE_IDLE;
851
mrq->cmd->error = -ETIMEDOUT;
852
mmc_request_done(mmc, mrq);
859
host->data = mrq->data;
861
if (mrq->data->flags & MMC_DATA_READ) {
863
sh_mmcif_start_dma_rx(host);
866
sh_mmcif_start_dma_tx(host);
869
sh_mmcif_start_cmd(host, mrq, mrq->cmd);
872
if (!mrq->cmd->error && mrq->stop)
873
sh_mmcif_stop_cmd(host, mrq, mrq->stop);
874
host->state = STATE_IDLE;
875
mmc_request_done(mmc, mrq);
878
static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
880
struct sh_mmcif_host *host = mmc_priv(mmc);
881
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
884
spin_lock_irqsave(&host->lock, flags);
885
if (host->state != STATE_IDLE) {
886
spin_unlock_irqrestore(&host->lock, flags);
890
host->state = STATE_IOS;
891
spin_unlock_irqrestore(&host->lock, flags);
893
if (ios->power_mode == MMC_POWER_UP) {
894
if (!host->card_present) {
895
/* See if we also get DMA */
896
sh_mmcif_request_dma(host, host->pd->dev.platform_data);
897
host->card_present = true;
899
} else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
901
sh_mmcif_clock_control(host, 0);
902
if (ios->power_mode == MMC_POWER_OFF) {
903
if (host->card_present) {
904
sh_mmcif_release_dma(host);
905
host->card_present = false;
909
pm_runtime_put(&host->pd->dev);
911
if (p->down_pwr && ios->power_mode == MMC_POWER_OFF)
912
p->down_pwr(host->pd);
914
host->state = STATE_IDLE;
921
p->set_pwr(host->pd, ios->power_mode);
922
pm_runtime_get_sync(&host->pd->dev);
924
sh_mmcif_sync_reset(host);
926
sh_mmcif_clock_control(host, ios->clock);
929
host->bus_width = ios->bus_width;
930
host->state = STATE_IDLE;
933
static int sh_mmcif_get_cd(struct mmc_host *mmc)
935
struct sh_mmcif_host *host = mmc_priv(mmc);
936
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
941
return p->get_cd(host->pd);
944
static struct mmc_host_ops sh_mmcif_ops = {
945
.request = sh_mmcif_request,
946
.set_ios = sh_mmcif_set_ios,
947
.get_cd = sh_mmcif_get_cd,
950
static void sh_mmcif_detect(struct mmc_host *mmc)
952
mmc_detect_change(mmc, 0);
955
static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
957
struct sh_mmcif_host *host = dev_id;
961
state = sh_mmcif_readl(host->addr, MMCIF_CE_INT);
963
if (state & INT_RBSYE) {
964
sh_mmcif_writel(host->addr, MMCIF_CE_INT,
965
~(INT_RBSYE | INT_CRSPE));
966
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
967
} else if (state & INT_CRSPE) {
968
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE);
969
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE);
970
} else if (state & INT_BUFREN) {
971
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN);
972
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
973
} else if (state & INT_BUFWEN) {
974
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN);
975
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
976
} else if (state & INT_CMD12DRE) {
977
sh_mmcif_writel(host->addr, MMCIF_CE_INT,
978
~(INT_CMD12DRE | INT_CMD12RBE |
979
INT_CMD12CRE | INT_BUFRE));
980
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
981
} else if (state & INT_BUFRE) {
982
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE);
983
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
984
} else if (state & INT_DTRANE) {
985
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE);
986
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
987
} else if (state & INT_CMD12RBE) {
988
sh_mmcif_writel(host->addr, MMCIF_CE_INT,
989
~(INT_CMD12RBE | INT_CMD12CRE));
990
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
991
} else if (state & INT_ERR_STS) {
993
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
994
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
997
dev_dbg(&host->pd->dev, "Unsupported interrupt: 0x%x\n", state);
998
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
999
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
1003
host->sd_error = true;
1004
dev_dbg(&host->pd->dev, "int err state = %08x\n", state);
1006
if (state & ~(INT_CMD12RBE | INT_CMD12CRE))
1007
complete(&host->intr_wait);
1009
dev_dbg(&host->pd->dev, "Unexpected IRQ 0x%x\n", state);
1014
static int __devinit sh_mmcif_probe(struct platform_device *pdev)
1016
int ret = 0, irq[2];
1017
struct mmc_host *mmc;
1018
struct sh_mmcif_host *host;
1019
struct sh_mmcif_plat_data *pd;
1020
struct resource *res;
1024
irq[0] = platform_get_irq(pdev, 0);
1025
irq[1] = platform_get_irq(pdev, 1);
1026
if (irq[0] < 0 || irq[1] < 0) {
1027
dev_err(&pdev->dev, "Get irq error\n");
1030
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1032
dev_err(&pdev->dev, "platform_get_resource error.\n");
1035
reg = ioremap(res->start, resource_size(res));
1037
dev_err(&pdev->dev, "ioremap error.\n");
1040
pd = pdev->dev.platform_data;
1042
dev_err(&pdev->dev, "sh_mmcif plat data error.\n");
1046
mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev);
1051
host = mmc_priv(mmc);
1054
host->timeout = 1000;
1056
snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id);
1057
host->hclk = clk_get(&pdev->dev, clk_name);
1058
if (IS_ERR(host->hclk)) {
1059
dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
1060
ret = PTR_ERR(host->hclk);
1063
clk_enable(host->hclk);
1064
host->clk = clk_get_rate(host->hclk);
1067
init_completion(&host->intr_wait);
1068
spin_lock_init(&host->lock);
1070
mmc->ops = &sh_mmcif_ops;
1071
mmc->f_max = host->clk;
1072
/* close to 400KHz */
1073
if (mmc->f_max < 51200000)
1074
mmc->f_min = mmc->f_max / 128;
1075
else if (mmc->f_max < 102400000)
1076
mmc->f_min = mmc->f_max / 256;
1078
mmc->f_min = mmc->f_max / 512;
1080
mmc->ocr_avail = pd->ocr;
1081
mmc->caps = MMC_CAP_MMC_HIGHSPEED;
1083
mmc->caps |= pd->caps;
1085
mmc->max_blk_size = 512;
1086
mmc->max_req_size = PAGE_CACHE_SIZE * mmc->max_segs;
1087
mmc->max_blk_count = mmc->max_req_size / mmc->max_blk_size;
1088
mmc->max_seg_size = mmc->max_req_size;
1090
sh_mmcif_sync_reset(host);
1091
platform_set_drvdata(pdev, host);
1093
pm_runtime_enable(&pdev->dev);
1094
host->power = false;
1096
ret = pm_runtime_resume(&pdev->dev);
1102
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
1104
ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
1106
dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n");
1109
ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
1111
free_irq(irq[0], host);
1112
dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
1116
sh_mmcif_detect(host->mmc);
1118
dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
1119
dev_dbg(&pdev->dev, "chip ver H'%04x\n",
1120
sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
1124
mmc_remove_host(mmc);
1125
pm_runtime_suspend(&pdev->dev);
1127
pm_runtime_disable(&pdev->dev);
1128
clk_disable(host->hclk);
1137
static int __devexit sh_mmcif_remove(struct platform_device *pdev)
1139
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
1142
pm_runtime_get_sync(&pdev->dev);
1144
mmc_remove_host(host->mmc);
1145
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
1148
iounmap(host->addr);
1150
irq[0] = platform_get_irq(pdev, 0);
1151
irq[1] = platform_get_irq(pdev, 1);
1153
free_irq(irq[0], host);
1154
free_irq(irq[1], host);
1156
platform_set_drvdata(pdev, NULL);
1158
clk_disable(host->hclk);
1159
mmc_free_host(host->mmc);
1160
pm_runtime_put_sync(&pdev->dev);
1161
pm_runtime_disable(&pdev->dev);
1167
static int sh_mmcif_suspend(struct device *dev)
1169
struct platform_device *pdev = to_platform_device(dev);
1170
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
1171
int ret = mmc_suspend_host(host->mmc);
1174
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
1175
clk_disable(host->hclk);
1181
static int sh_mmcif_resume(struct device *dev)
1183
struct platform_device *pdev = to_platform_device(dev);
1184
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
1186
clk_enable(host->hclk);
1188
return mmc_resume_host(host->mmc);
1191
#define sh_mmcif_suspend NULL
1192
#define sh_mmcif_resume NULL
1193
#endif /* CONFIG_PM */
1195
static const struct dev_pm_ops sh_mmcif_dev_pm_ops = {
1196
.suspend = sh_mmcif_suspend,
1197
.resume = sh_mmcif_resume,
1200
static struct platform_driver sh_mmcif_driver = {
1201
.probe = sh_mmcif_probe,
1202
.remove = sh_mmcif_remove,
1204
.name = DRIVER_NAME,
1205
.pm = &sh_mmcif_dev_pm_ops,
1209
static int __init sh_mmcif_init(void)
1211
return platform_driver_register(&sh_mmcif_driver);
1214
static void __exit sh_mmcif_exit(void)
1216
platform_driver_unregister(&sh_mmcif_driver);
1219
module_init(sh_mmcif_init);
1220
module_exit(sh_mmcif_exit);
1223
MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
1224
MODULE_LICENSE("GPL");
1225
MODULE_ALIAS("platform:" DRIVER_NAME);
1226
MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>");