/* * MMCIF eMMC driver. * * Copyright (C) 2010 Renesas Solutions Corp. * Yusuke Goda * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License. * * * TODO * 1. DMA * 2. Power management * 3. Handle MMC errors better * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_NAME "sh_mmcif" #define DRIVER_VERSION "2010-04-28" /* CE_CMD_SET */ #define CMD_MASK 0x3f000000 #define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22)) #define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */ #define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */ #define CMD_SET_RBSY (1 << 21) /* R1b */ #define CMD_SET_CCSEN (1 << 20) #define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */ #define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */ #define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */ #define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */ #define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */ #define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */ #define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */ #define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/ #define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/ #define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/ #define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/ #define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */ #define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */ #define CMD_SET_OPDM (1 << 6) /* 1: open/drain */ #define CMD_SET_CCSH (1 << 5) #define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */ #define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */ #define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */ /* CE_CMD_CTRL */ #define CMD_CTRL_BREAK (1 << 0) /* CE_BLOCK_SET */ #define BLOCK_SIZE_MASK 0x0000ffff /* CE_INT */ #define INT_CCSDE (1 << 29) #define INT_CMD12DRE (1 << 26) #define INT_CMD12RBE (1 << 25) #define INT_CMD12CRE (1 << 24) #define INT_DTRANE (1 << 23) #define INT_BUFRE (1 << 22) #define INT_BUFWEN (1 << 21) #define INT_BUFREN (1 << 20) #define INT_CCSRCV (1 << 19) #define INT_RBSYE (1 << 17) #define INT_CRSPE (1 << 16) #define INT_CMDVIO (1 << 15) #define INT_BUFVIO (1 << 14) #define INT_WDATERR (1 << 11) #define INT_RDATERR (1 << 10) #define INT_RIDXERR (1 << 9) #define INT_RSPERR (1 << 8) #define INT_CCSTO (1 << 5) #define INT_CRCSTO (1 << 4) #define INT_WDATTO (1 << 3) #define INT_RDATTO (1 << 2) #define INT_RBSYTO (1 << 1) #define INT_RSPTO (1 << 0) #define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \ INT_RDATERR | INT_RIDXERR | INT_RSPERR | \ INT_CCSTO | INT_CRCSTO | INT_WDATTO | \ INT_RDATTO | INT_RBSYTO | INT_RSPTO) /* CE_INT_MASK */ #define MASK_ALL 0x00000000 #define MASK_MCCSDE (1 << 29) #define MASK_MCMD12DRE (1 << 26) #define MASK_MCMD12RBE (1 << 25) #define MASK_MCMD12CRE (1 << 24) #define MASK_MDTRANE (1 << 23) #define MASK_MBUFRE (1 << 22) #define MASK_MBUFWEN (1 << 21) #define MASK_MBUFREN (1 << 20) #define MASK_MCCSRCV (1 << 19) #define MASK_MRBSYE (1 << 17) #define MASK_MCRSPE (1 << 16) #define MASK_MCMDVIO (1 << 15) #define MASK_MBUFVIO (1 << 14) #define MASK_MWDATERR (1 << 11) #define MASK_MRDATERR (1 << 10) #define MASK_MRIDXERR (1 << 9) #define MASK_MRSPERR (1 << 8) #define MASK_MCCSTO (1 << 5) #define MASK_MCRCSTO (1 << 4) #define MASK_MWDATTO (1 << 3) #define MASK_MRDATTO (1 << 2) #define MASK_MRBSYTO (1 << 1) #define MASK_MRSPTO (1 << 0) /* CE_HOST_STS1 */ #define STS1_CMDSEQ (1 << 31) /* CE_HOST_STS2 */ #define STS2_CRCSTE (1 << 31) #define STS2_CRC16E (1 << 30) #define STS2_AC12CRCE (1 << 29) #define STS2_RSPCRC7E (1 << 28) #define STS2_CRCSTEBE (1 << 27) #define STS2_RDATEBE (1 << 26) #define STS2_AC12REBE (1 << 25) #define STS2_RSPEBE (1 << 24) #define STS2_AC12IDXE (1 << 23) #define STS2_RSPIDXE (1 << 22) #define STS2_CCSTO (1 << 15) #define STS2_RDATTO (1 << 14) #define STS2_DATBSYTO (1 << 13) #define STS2_CRCSTTO (1 << 12) #define STS2_AC12BSYTO (1 << 11) #define STS2_RSPBSYTO (1 << 10) #define STS2_AC12RSPTO (1 << 9) #define STS2_RSPTO (1 << 8) #define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \ STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE) #define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \ STS2_DATBSYTO | STS2_CRCSTTO | \ STS2_AC12BSYTO | STS2_RSPBSYTO | \ STS2_AC12RSPTO | STS2_RSPTO) #define CLKDEV_EMMC_DATA 52000000 /* 52MHz */ #define CLKDEV_MMC_DATA 20000000 /* 20MHz */ #define CLKDEV_INIT 400000 /* 400 KHz */ struct sh_mmcif_host { struct mmc_host *mmc; struct mmc_data *data; struct platform_device *pd; struct clk *hclk; unsigned int clk; int bus_width; bool sd_error; long timeout; void __iomem *addr; struct completion intr_wait; /* DMA support */ struct dma_chan *chan_rx; struct dma_chan *chan_tx; struct completion dma_complete; unsigned int dma_sglen; }; static inline void sh_mmcif_bitset(struct sh_mmcif_host *host, unsigned int reg, u32 val) { writel(val | readl(host->addr + reg), host->addr + reg); } static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host, unsigned int reg, u32 val) { writel(~val & readl(host->addr + reg), host->addr + reg); } static void mmcif_dma_complete(void *arg) { struct sh_mmcif_host *host = arg; dev_dbg(&host->pd->dev, "Command completed\n"); if (WARN(!host->data, "%s: NULL data in DMA completion!\n", dev_name(&host->pd->dev))) return; if (host->data->flags & MMC_DATA_READ) dma_unmap_sg(host->chan_rx->device->dev, host->data->sg, host->dma_sglen, DMA_FROM_DEVICE); else dma_unmap_sg(host->chan_tx->device->dev, host->data->sg, host->dma_sglen, DMA_TO_DEVICE); complete(&host->dma_complete); } static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host) { struct scatterlist *sg = host->data->sg; struct dma_async_tx_descriptor *desc = NULL; struct dma_chan *chan = host->chan_rx; dma_cookie_t cookie = -EINVAL; int ret; ret = dma_map_sg(chan->device->dev, sg, host->data->sg_len, DMA_FROM_DEVICE); if (ret > 0) { host->dma_sglen = ret; desc = chan->device->device_prep_slave_sg(chan, sg, ret, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); } if (desc) { desc->callback = mmcif_dma_complete; desc->callback_param = host; cookie = desc->tx_submit(desc); if (cookie < 0) { desc = NULL; ret = cookie; } else { sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN); chan->device->device_issue_pending(chan); } } dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n", __func__, host->data->sg_len, ret, cookie); if (!desc) { /* DMA failed, fall back to PIO */ if (ret >= 0) ret = -EIO; host->chan_rx = NULL; host->dma_sglen = 0; dma_release_channel(chan); /* Free the Tx channel too */ chan = host->chan_tx; if (chan) { host->chan_tx = NULL; dma_release_channel(chan); } dev_warn(&host->pd->dev, "DMA failed: %d, falling back to PIO\n", ret); sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); } dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__, desc, cookie, host->data->sg_len); } static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host) { struct scatterlist *sg = host->data->sg; struct dma_async_tx_descriptor *desc = NULL; struct dma_chan *chan = host->chan_tx; dma_cookie_t cookie = -EINVAL; int ret; ret = dma_map_sg(chan->device->dev, sg, host->data->sg_len, DMA_TO_DEVICE); if (ret > 0) { host->dma_sglen = ret; desc = chan->device->device_prep_slave_sg(chan, sg, ret, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); } if (desc) { desc->callback = mmcif_dma_complete; desc->callback_param = host; cookie = desc->tx_submit(desc); if (cookie < 0) { desc = NULL; ret = cookie; } else { sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAWEN); chan->device->device_issue_pending(chan); } } dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n", __func__, host->data->sg_len, ret, cookie); if (!desc) { /* DMA failed, fall back to PIO */ if (ret >= 0) ret = -EIO; host->chan_tx = NULL; host->dma_sglen = 0; dma_release_channel(chan); /* Free the Rx channel too */ chan = host->chan_rx; if (chan) { host->chan_rx = NULL; dma_release_channel(chan); } dev_warn(&host->pd->dev, "DMA failed: %d, falling back to PIO\n", ret); sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); } dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d\n", __func__, desc, cookie); } static bool sh_mmcif_filter(struct dma_chan *chan, void *arg) { dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg); chan->private = arg; return true; } static void sh_mmcif_request_dma(struct sh_mmcif_host *host, struct sh_mmcif_plat_data *pdata) { host->dma_sglen = 0; /* We can only either use DMA for both Tx and Rx or not use it at all */ if (pdata->dma) { dma_cap_mask_t mask; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); host->chan_tx = dma_request_channel(mask, sh_mmcif_filter, &pdata->dma->chan_priv_tx); dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__, host->chan_tx); if (!host->chan_tx) return; host->chan_rx = dma_request_channel(mask, sh_mmcif_filter, &pdata->dma->chan_priv_rx); dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__, host->chan_rx); if (!host->chan_rx) { dma_release_channel(host->chan_tx); host->chan_tx = NULL; return; } init_completion(&host->dma_complete); } } static void sh_mmcif_release_dma(struct sh_mmcif_host *host) { sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); /* Descriptors are freed automatically */ if (host->chan_tx) { struct dma_chan *chan = host->chan_tx; host->chan_tx = NULL; dma_release_channel(chan); } if (host->chan_rx) { struct dma_chan *chan = host->chan_rx; host->chan_rx = NULL; dma_release_channel(chan); } host->dma_sglen = 0; } static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk) { struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE); sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR); if (!clk) return; if (p->sup_pclk && clk == host->clk) sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK); else sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR & (ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16)); sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE); } static void sh_mmcif_sync_reset(struct sh_mmcif_host *host) { u32 tmp; tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL); sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON); sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF); sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); /* byte swap on */ sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP); } static int sh_mmcif_error_manage(struct sh_mmcif_host *host) { u32 state1, state2; int ret, timeout = 10000000; host->sd_error = false; state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1); state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2); dev_dbg(&host->pd->dev, "ERR HOST_STS1 = %08x\n", state1); dev_dbg(&host->pd->dev, "ERR HOST_STS2 = %08x\n", state2); if (state1 & STS1_CMDSEQ) { sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK); sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK); while (1) { timeout--; if (timeout < 0) { dev_err(&host->pd->dev, "Forceed end of command sequence timeout err\n"); return -EIO; } if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1) & STS1_CMDSEQ)) break; mdelay(1); } sh_mmcif_sync_reset(host); dev_dbg(&host->pd->dev, "Forced end of command sequence\n"); return -EIO; } if (state2 & STS2_CRC_ERR) { dev_dbg(&host->pd->dev, ": Happened CRC error\n"); ret = -EIO; } else if (state2 & STS2_TIMEOUT_ERR) { dev_dbg(&host->pd->dev, ": Happened Timeout error\n"); ret = -ETIMEDOUT; } else { dev_dbg(&host->pd->dev, ": Happened End/Index error\n"); ret = -EIO; } return ret; } static int sh_mmcif_single_read(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 blocksize, i, *p = sg_virt(data->sg); /* buf read enable */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) return sh_mmcif_error_manage(host); blocksize = (BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3; for (i = 0; i < blocksize / 4; i++) *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); /* buffer read end */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) return sh_mmcif_error_manage(host); return 0; } static int sh_mmcif_multi_read(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 blocksize, i, j, sec, *p; blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET); for (j = 0; j < data->sg_len; j++) { p = sg_virt(data->sg); for (sec = 0; sec < data->sg->length / blocksize; sec++) { sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); /* buf read enable */ time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) return sh_mmcif_error_manage(host); for (i = 0; i < blocksize / 4; i++) *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); } if (j < data->sg_len - 1) data->sg++; } return 0; } static int sh_mmcif_single_write(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 blocksize, i, *p = sg_virt(data->sg); sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); /* buf write enable */ time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) return sh_mmcif_error_manage(host); blocksize = (BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3; for (i = 0; i < blocksize / 4; i++) sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); /* buffer write end */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) return sh_mmcif_error_manage(host); return 0; } static int sh_mmcif_multi_write(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 i, sec, j, blocksize, *p; blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET); for (j = 0; j < data->sg_len; j++) { p = sg_virt(data->sg); for (sec = 0; sec < data->sg->length / blocksize; sec++) { sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); /* buf write enable*/ time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) return sh_mmcif_error_manage(host); for (i = 0; i < blocksize / 4; i++) sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); } if (j < data->sg_len - 1) data->sg++; } return 0; } static void sh_mmcif_get_response(struct sh_mmcif_host *host, struct mmc_command *cmd) { if (cmd->flags & MMC_RSP_136) { cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3); cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2); cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1); cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0); } else cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0); } static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host, struct mmc_command *cmd) { cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12); } static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq, struct mmc_command *cmd, u32 opc) { u32 tmp = 0; /* Response Type check */ switch (mmc_resp_type(cmd)) { case MMC_RSP_NONE: tmp |= CMD_SET_RTYP_NO; break; case MMC_RSP_R1: case MMC_RSP_R1B: case MMC_RSP_R3: tmp |= CMD_SET_RTYP_6B; break; case MMC_RSP_R2: tmp |= CMD_SET_RTYP_17B; break; default: dev_err(&host->pd->dev, "Unsupported response type.\n"); break; } switch (opc) { /* RBSY */ case MMC_SWITCH: case MMC_STOP_TRANSMISSION: case MMC_SET_WRITE_PROT: case MMC_CLR_WRITE_PROT: case MMC_ERASE: case MMC_GEN_CMD: tmp |= CMD_SET_RBSY; break; } /* WDAT / DATW */ if (host->data) { tmp |= CMD_SET_WDAT; switch (host->bus_width) { case MMC_BUS_WIDTH_1: tmp |= CMD_SET_DATW_1; break; case MMC_BUS_WIDTH_4: tmp |= CMD_SET_DATW_4; break; case MMC_BUS_WIDTH_8: tmp |= CMD_SET_DATW_8; break; default: dev_err(&host->pd->dev, "Unsupported bus width.\n"); break; } } /* DWEN */ if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) tmp |= CMD_SET_DWEN; /* CMLTE/CMD12EN */ if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) { tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN; sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET, mrq->data->blocks << 16); } /* RIDXC[1:0] check bits */ if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID || opc == MMC_SEND_CSD || opc == MMC_SEND_CID) tmp |= CMD_SET_RIDXC_BITS; /* RCRC7C[1:0] check bits */ if (opc == MMC_SEND_OP_COND) tmp |= CMD_SET_CRC7C_BITS; /* RCRC7C[1:0] internal CRC7 */ if (opc == MMC_ALL_SEND_CID || opc == MMC_SEND_CSD || opc == MMC_SEND_CID) tmp |= CMD_SET_CRC7C_INTERNAL; return opc = ((opc << 24) | tmp); } static int sh_mmcif_data_trans(struct sh_mmcif_host *host, struct mmc_request *mrq, u32 opc) { int ret; switch (opc) { case MMC_READ_MULTIPLE_BLOCK: ret = sh_mmcif_multi_read(host, mrq); break; case MMC_WRITE_MULTIPLE_BLOCK: ret = sh_mmcif_multi_write(host, mrq); break; case MMC_WRITE_BLOCK: ret = sh_mmcif_single_write(host, mrq); break; case MMC_READ_SINGLE_BLOCK: case MMC_SEND_EXT_CSD: ret = sh_mmcif_single_read(host, mrq); break; default: dev_err(&host->pd->dev, "UNSUPPORTED CMD = d'%08d\n", opc); ret = -EINVAL; break; } return ret; } static void sh_mmcif_start_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { long time; int ret = 0, mask = 0; u32 opc = cmd->opcode; switch (opc) { /* respons busy check */ case MMC_SWITCH: case MMC_STOP_TRANSMISSION: case MMC_SET_WRITE_PROT: case MMC_CLR_WRITE_PROT: case MMC_ERASE: case MMC_GEN_CMD: mask = MASK_MRBSYE; break; default: mask = MASK_MCRSPE; break; } mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR | MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR | MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO | MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO; if (host->data) { sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0); sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, mrq->data->blksz); } opc = sh_mmcif_set_cmd(host, mrq, cmd, opc); sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0); sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask); /* set arg */ sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg); /* set cmd */ sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc); time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0) { cmd->error = sh_mmcif_error_manage(host); return; } if (host->sd_error) { switch (cmd->opcode) { case MMC_ALL_SEND_CID: case MMC_SELECT_CARD: case MMC_APP_CMD: cmd->error = -ETIMEDOUT; break; default: dev_dbg(&host->pd->dev, "Cmd(d'%d) err\n", cmd->opcode); cmd->error = sh_mmcif_error_manage(host); break; } host->sd_error = false; return; } if (!(cmd->flags & MMC_RSP_PRESENT)) { cmd->error = 0; return; } sh_mmcif_get_response(host, cmd); if (host->data) { if (!host->dma_sglen) { ret = sh_mmcif_data_trans(host, mrq, cmd->opcode); } else { long time = wait_for_completion_interruptible_timeout(&host->dma_complete, host->timeout); if (!time) ret = -ETIMEDOUT; else if (time < 0) ret = time; sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); host->dma_sglen = 0; } if (ret < 0) mrq->data->bytes_xfered = 0; else mrq->data->bytes_xfered = mrq->data->blocks * mrq->data->blksz; } cmd->error = ret; } static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { long time; if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK) sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE); else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK) sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE); else { dev_err(&host->pd->dev, "unsupported stop cmd\n"); cmd->error = sh_mmcif_error_manage(host); return; } time = wait_for_completion_interruptible_timeout(&host->intr_wait, host->timeout); if (time <= 0 || host->sd_error) { cmd->error = sh_mmcif_error_manage(host); return; } sh_mmcif_get_cmd12response(host, cmd); cmd->error = 0; } static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq) { struct sh_mmcif_host *host = mmc_priv(mmc); switch (mrq->cmd->opcode) { /* MMCIF does not support SD/SDIO command */ case SD_IO_SEND_OP_COND: case MMC_APP_CMD: mrq->cmd->error = -ETIMEDOUT; mmc_request_done(mmc, mrq); return; case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */ if (!mrq->data) { /* send_if_cond cmd (not support) */ mrq->cmd->error = -ETIMEDOUT; mmc_request_done(mmc, mrq); return; } break; default: break; } host->data = mrq->data; if (mrq->data) { if (mrq->data->flags & MMC_DATA_READ) { if (host->chan_rx) sh_mmcif_start_dma_rx(host); } else { if (host->chan_tx) sh_mmcif_start_dma_tx(host); } } sh_mmcif_start_cmd(host, mrq, mrq->cmd); host->data = NULL; if (mrq->cmd->error != 0) { mmc_request_done(mmc, mrq); return; } if (mrq->stop) sh_mmcif_stop_cmd(host, mrq, mrq->stop); mmc_request_done(mmc, mrq); } static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct sh_mmcif_host *host = mmc_priv(mmc); struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; if (ios->power_mode == MMC_POWER_OFF) { /* clock stop */ sh_mmcif_clock_control(host, 0); if (p->down_pwr) p->down_pwr(host->pd); return; } else if (ios->power_mode == MMC_POWER_UP) { if (p->set_pwr) p->set_pwr(host->pd, ios->power_mode); } if (ios->clock) sh_mmcif_clock_control(host, ios->clock); host->bus_width = ios->bus_width; } static int sh_mmcif_get_cd(struct mmc_host *mmc) { struct sh_mmcif_host *host = mmc_priv(mmc); struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; if (!p->get_cd) return -ENOSYS; else return p->get_cd(host->pd); } static struct mmc_host_ops sh_mmcif_ops = { .request = sh_mmcif_request, .set_ios = sh_mmcif_set_ios, .get_cd = sh_mmcif_get_cd, }; static void sh_mmcif_detect(struct mmc_host *mmc) { mmc_detect_change(mmc, 0); } static irqreturn_t sh_mmcif_intr(int irq, void *dev_id) { struct sh_mmcif_host *host = dev_id; u32 state; int err = 0; state = sh_mmcif_readl(host->addr, MMCIF_CE_INT); if (state & INT_RBSYE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(INT_RBSYE | INT_CRSPE)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE); } else if (state & INT_CRSPE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE); } else if (state & INT_BUFREN) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); } else if (state & INT_BUFWEN) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); } else if (state & INT_CMD12DRE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(INT_CMD12DRE | INT_CMD12RBE | INT_CMD12CRE | INT_BUFRE)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE); } else if (state & INT_BUFRE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); } else if (state & INT_DTRANE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); } else if (state & INT_CMD12RBE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(INT_CMD12RBE | INT_CMD12CRE)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE); } else if (state & INT_ERR_STS) { /* err interrupts */ sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state); err = 1; } else { dev_dbg(&host->pd->dev, "Not support int\n"); sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state); err = 1; } if (err) { host->sd_error = true; dev_dbg(&host->pd->dev, "int err state = %08x\n", state); } if (state & ~(INT_CMD12RBE | INT_CMD12CRE)) complete(&host->intr_wait); else dev_dbg(&host->pd->dev, "Unexpected IRQ 0x%x\n", state); return IRQ_HANDLED; } static int __devinit sh_mmcif_probe(struct platform_device *pdev) { int ret = 0, irq[2]; struct mmc_host *mmc; struct sh_mmcif_host *host; struct sh_mmcif_plat_data *pd; struct resource *res; void __iomem *reg; char clk_name[8]; irq[0] = platform_get_irq(pdev, 0); irq[1] = platform_get_irq(pdev, 1); if (irq[0] < 0 || irq[1] < 0) { dev_err(&pdev->dev, "Get irq error\n"); return -ENXIO; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "platform_get_resource error.\n"); return -ENXIO; } reg = ioremap(res->start, resource_size(res)); if (!reg) { dev_err(&pdev->dev, "ioremap error.\n"); return -ENOMEM; } pd = pdev->dev.platform_data; if (!pd) { dev_err(&pdev->dev, "sh_mmcif plat data error.\n"); ret = -ENXIO; goto clean_up; } mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev); if (!mmc) { ret = -ENOMEM; goto clean_up; } host = mmc_priv(mmc); host->mmc = mmc; host->addr = reg; host->timeout = 1000; snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id); host->hclk = clk_get(&pdev->dev, clk_name); if (IS_ERR(host->hclk)) { dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); ret = PTR_ERR(host->hclk); goto clean_up1; } clk_enable(host->hclk); host->clk = clk_get_rate(host->hclk); host->pd = pdev; init_completion(&host->intr_wait); mmc->ops = &sh_mmcif_ops; mmc->f_max = host->clk; /* close to 400KHz */ if (mmc->f_max < 51200000) mmc->f_min = mmc->f_max / 128; else if (mmc->f_max < 102400000) mmc->f_min = mmc->f_max / 256; else mmc->f_min = mmc->f_max / 512; if (pd->ocr) mmc->ocr_avail = pd->ocr; mmc->caps = MMC_CAP_MMC_HIGHSPEED; if (pd->caps) mmc->caps |= pd->caps; mmc->max_segs = 32; mmc->max_blk_size = 512; mmc->max_req_size = PAGE_CACHE_SIZE * mmc->max_segs; mmc->max_blk_count = mmc->max_req_size / mmc->max_blk_size; mmc->max_seg_size = mmc->max_req_size; sh_mmcif_sync_reset(host); platform_set_drvdata(pdev, host); /* See if we also get DMA */ sh_mmcif_request_dma(host, pd); mmc_add_host(mmc); ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host); if (ret) { dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n"); goto clean_up2; } ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host); if (ret) { free_irq(irq[0], host); dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n"); goto clean_up2; } sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); sh_mmcif_detect(host->mmc); dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION); dev_dbg(&pdev->dev, "chip ver H'%04x\n", sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff); return ret; clean_up2: clk_disable(host->hclk); clean_up1: mmc_free_host(mmc); clean_up: if (reg) iounmap(reg); return ret; } static int __devexit sh_mmcif_remove(struct platform_device *pdev) { struct sh_mmcif_host *host = platform_get_drvdata(pdev); int irq[2]; mmc_remove_host(host->mmc); sh_mmcif_release_dma(host); if (host->addr) iounmap(host->addr); sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); irq[0] = platform_get_irq(pdev, 0); irq[1] = platform_get_irq(pdev, 1); free_irq(irq[0], host); free_irq(irq[1], host); platform_set_drvdata(pdev, NULL); clk_disable(host->hclk); mmc_free_host(host->mmc); return 0; } static struct platform_driver sh_mmcif_driver = { .probe = sh_mmcif_probe, .remove = sh_mmcif_remove, .driver = { .name = DRIVER_NAME, }, }; static int __init sh_mmcif_init(void) { return platform_driver_register(&sh_mmcif_driver); } static void __exit sh_mmcif_exit(void) { platform_driver_unregister(&sh_mmcif_driver); } module_init(sh_mmcif_init); module_exit(sh_mmcif_exit); MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRIVER_NAME); MODULE_AUTHOR("Yusuke Goda ");