diff options
Diffstat (limited to 'drivers/mmc/host/msm_sdcc.c')
| -rw-r--r-- | drivers/mmc/host/msm_sdcc.c | 1287 |
1 files changed, 1287 insertions, 0 deletions
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c new file mode 100644 index 000000000000..dba4600bcdb4 --- /dev/null +++ b/drivers/mmc/host/msm_sdcc.c @@ -0,0 +1,1287 @@ +/* + * linux/drivers/mmc/host/msm_sdcc.c - Qualcomm MSM 7X00A SDCC Driver + * + * Copyright (C) 2007 Google Inc, + * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Based on mmci.c + * + * Author: San Mehat (san@android.com) + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/device.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/highmem.h> +#include <linux/log2.h> +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/clk.h> +#include <linux/scatterlist.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/debugfs.h> +#include <linux/io.h> +#include <linux/memory.h> + +#include <asm/cacheflush.h> +#include <asm/div64.h> +#include <asm/sizes.h> + +#include <asm/mach/mmc.h> +#include <mach/msm_iomap.h> +#include <mach/dma.h> +#include <mach/htc_pwrsink.h> + +#include "msm_sdcc.h" + +#define DRIVER_NAME "msm-sdcc" + +static unsigned int msmsdcc_fmin = 144000; +static unsigned int msmsdcc_fmax = 50000000; +static unsigned int msmsdcc_4bit = 1; +static unsigned int msmsdcc_pwrsave = 1; +static unsigned int msmsdcc_piopoll = 1; +static unsigned int msmsdcc_sdioirq; + +#define PIO_SPINMAX 30 +#define CMD_SPINMAX 20 + +static void +msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd, + u32 c); + +static void +msmsdcc_request_end(struct msmsdcc_host *host, struct mmc_request *mrq) +{ + writel(0, host->base + MMCICOMMAND); + + BUG_ON(host->curr.data); + + host->curr.mrq = NULL; + host->curr.cmd = NULL; + + if (mrq->data) + mrq->data->bytes_xfered = host->curr.data_xfered; + if (mrq->cmd->error == -ETIMEDOUT) + mdelay(5); + + /* + * Need to drop the host lock here; mmc_request_done may call + * back into the driver... + */ + spin_unlock(&host->lock); + mmc_request_done(host->mmc, mrq); + spin_lock(&host->lock); +} + +static void +msmsdcc_stop_data(struct msmsdcc_host *host) +{ + writel(0, host->base + MMCIDATACTRL); + host->curr.data = NULL; + host->curr.got_dataend = host->curr.got_datablkend = 0; +} + +uint32_t msmsdcc_fifo_addr(struct msmsdcc_host *host) +{ + switch (host->pdev_id) { + case 1: + return MSM_SDC1_PHYS + MMCIFIFO; + case 2: + return MSM_SDC2_PHYS + MMCIFIFO; + case 3: + return MSM_SDC3_PHYS + MMCIFIFO; + case 4: + return MSM_SDC4_PHYS + MMCIFIFO; + } + BUG(); + return 0; +} + +static void +msmsdcc_dma_complete_func(struct msm_dmov_cmd *cmd, + unsigned int result, + struct msm_dmov_errdata *err) +{ + struct msmsdcc_dma_data *dma_data = + container_of(cmd, struct msmsdcc_dma_data, hdr); + struct msmsdcc_host *host = dma_data->host; + unsigned long flags; + struct mmc_request *mrq; + + spin_lock_irqsave(&host->lock, flags); + mrq = host->curr.mrq; + BUG_ON(!mrq); + + if (!(result & DMOV_RSLT_VALID)) { + pr_err("msmsdcc: Invalid DataMover result\n"); + goto out; + } + + if (result & DMOV_RSLT_DONE) { + host->curr.data_xfered = host->curr.xfer_size; + } else { + /* Error or flush */ + if (result & DMOV_RSLT_ERROR) + pr_err("%s: DMA error (0x%.8x)\n", + mmc_hostname(host->mmc), result); + if (result & DMOV_RSLT_FLUSH) + pr_err("%s: DMA channel flushed (0x%.8x)\n", + mmc_hostname(host->mmc), result); + if (err) + pr_err("Flush data: %.8x %.8x %.8x %.8x %.8x %.8x\n", + err->flush[0], err->flush[1], err->flush[2], + err->flush[3], err->flush[4], err->flush[5]); + if (!mrq->data->error) + mrq->data->error = -EIO; + } + host->dma.busy = 0; + dma_unmap_sg(mmc_dev(host->mmc), host->dma.sg, host->dma.num_ents, + host->dma.dir); + + if (host->curr.user_pages) { + struct scatterlist *sg = host->dma.sg; + int i; + + for (i = 0; i < host->dma.num_ents; i++) + flush_dcache_page(sg_page(sg++)); + } + + host->dma.sg = NULL; + + if ((host->curr.got_dataend && host->curr.got_datablkend) + || mrq->data->error) { + + /* + * If we've already gotten our DATAEND / DATABLKEND + * for this request, then complete it through here. + */ + msmsdcc_stop_data(host); + + if (!mrq->data->error) + host->curr.data_xfered = host->curr.xfer_size; + if (!mrq->data->stop || mrq->cmd->error) { + writel(0, host->base + MMCICOMMAND); + host->curr.mrq = NULL; + host->curr.cmd = NULL; + mrq->data->bytes_xfered = host->curr.data_xfered; + + spin_unlock_irqrestore(&host->lock, flags); + mmc_request_done(host->mmc, mrq); + return; + } else + msmsdcc_start_command(host, mrq->data->stop, 0); + } + +out: + spin_unlock_irqrestore(&host->lock, flags); + return; +} + +static int validate_dma(struct msmsdcc_host *host, struct mmc_data *data) +{ + if (host->dma.channel == -1) + return -ENOENT; + + if ((data->blksz * data->blocks) < MCI_FIFOSIZE) + return -EINVAL; + if ((data->blksz * data->blocks) % MCI_FIFOSIZE) + return -EINVAL; + return 0; +} + +static int msmsdcc_config_dma(struct msmsdcc_host *host, struct mmc_data *data) +{ + struct msmsdcc_nc_dmadata *nc; + dmov_box *box; + uint32_t rows; + uint32_t crci; + unsigned int n; + int i, rc; + struct scatterlist *sg = data->sg; + + rc = validate_dma(host, data); + if (rc) + return rc; + + host->dma.sg = data->sg; + host->dma.num_ents = data->sg_len; + + nc = host->dma.nc; + + switch (host->pdev_id) { + case 1: + crci = MSMSDCC_CRCI_SDC1; + break; + case 2: + crci = MSMSDCC_CRCI_SDC2; + break; + case 3: + crci = MSMSDCC_CRCI_SDC3; + break; + case 4: + crci = MSMSDCC_CRCI_SDC4; + break; + default: + host->dma.sg = NULL; + host->dma.num_ents = 0; + return -ENOENT; + } + + if (data->flags & MMC_DATA_READ) + host->dma.dir = DMA_FROM_DEVICE; + else + host->dma.dir = DMA_TO_DEVICE; + + host->curr.user_pages = 0; + + n = dma_map_sg(mmc_dev(host->mmc), host->dma.sg, + host->dma.num_ents, host->dma.dir); + + if (n != host->dma.num_ents) { + pr_err("%s: Unable to map in all sg elements\n", + mmc_hostname(host->mmc)); + host->dma.sg = NULL; + host->dma.num_ents = 0; + return -ENOMEM; + } + + box = &nc->cmd[0]; + for (i = 0; i < host->dma.num_ents; i++) { + box->cmd = CMD_MODE_BOX; + + if (i == (host->dma.num_ents - 1)) + box->cmd |= CMD_LC; + rows = (sg_dma_len(sg) % MCI_FIFOSIZE) ? + (sg_dma_len(sg) / MCI_FIFOSIZE) + 1 : + (sg_dma_len(sg) / MCI_FIFOSIZE) ; + + if (data->flags & MMC_DATA_READ) { + box->src_row_addr = msmsdcc_fifo_addr(host); + box->dst_row_addr = sg_dma_address(sg); + + box->src_dst_len = (MCI_FIFOSIZE << 16) | + (MCI_FIFOSIZE); + box->row_offset = MCI_FIFOSIZE; + + box->num_rows = rows * ((1 << 16) + 1); + box->cmd |= CMD_SRC_CRCI(crci); + } else { + box->src_row_addr = sg_dma_address(sg); + box->dst_row_addr = msmsdcc_fifo_addr(host); + + box->src_dst_len = (MCI_FIFOSIZE << 16) | + (MCI_FIFOSIZE); + box->row_offset = (MCI_FIFOSIZE << 16); + + box->num_rows = rows * ((1 << 16) + 1); + box->cmd |= CMD_DST_CRCI(crci); + } + box++; + sg++; + } + + /* location of command block must be 64 bit aligned */ + BUG_ON(host->dma.cmd_busaddr & 0x07); + + nc->cmdptr = (host->dma.cmd_busaddr >> 3) | CMD_PTR_LP; + host->dma.hdr.cmdptr = DMOV_CMD_PTR_LIST | + DMOV_CMD_ADDR(host->dma.cmdptr_busaddr); + host->dma.hdr.complete_func = msmsdcc_dma_complete_func; + + return 0; +} + +static void +msmsdcc_start_data(struct msmsdcc_host *host, struct mmc_data *data) +{ + unsigned int datactrl, timeout; + unsigned long long clks; + void __iomem *base = host->base; + unsigned int pio_irqmask = 0; + + host->curr.data = data; + host->curr.xfer_size = data->blksz * data->blocks; + host->curr.xfer_remain = host->curr.xfer_size; + host->curr.data_xfered = 0; + host->curr.got_dataend = 0; + host->curr.got_datablkend = 0; + + memset(&host->pio, 0, sizeof(host->pio)); + + clks = (unsigned long long)data->timeout_ns * host->clk_rate; + do_div(clks, NSEC_PER_SEC); + timeout = data->timeout_clks + (unsigned int)clks; + writel(timeout, base + MMCIDATATIMER); + + writel(host->curr.xfer_size, base + MMCIDATALENGTH); + + datactrl = MCI_DPSM_ENABLE | (data->blksz << 4); + + if (!msmsdcc_config_dma(host, data)) + datactrl |= MCI_DPSM_DMAENABLE; + else { + host->pio.sg = data->sg; + host->pio.sg_len = data->sg_len; + host->pio.sg_off = 0; + + if (data->flags & MMC_DATA_READ) { + pio_irqmask = MCI_RXFIFOHALFFULLMASK; + if (host->curr.xfer_remain < MCI_FIFOSIZE) + pio_irqmask |= MCI_RXDATAAVLBLMASK; + } else + pio_irqmask = MCI_TXFIFOHALFEMPTYMASK; + } + + if (data->flags & MMC_DATA_READ) + datactrl |= MCI_DPSM_DIRECTION; + + writel(pio_irqmask, base + MMCIMASK1); + writel(datactrl, base + MMCIDATACTRL); + + if (datactrl & MCI_DPSM_DMAENABLE) { + host->dma.busy = 1; + msm_dmov_enqueue_cmd(host->dma.channel, &host->dma.hdr); + } +} + +static void +msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd, u32 c) +{ + void __iomem *base = host->base; + + if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) { + writel(0, base + MMCICOMMAND); + udelay(2 + ((5 * 1000000) / host->clk_rate)); + } + + c |= cmd->opcode | MCI_CPSM_ENABLE; + + if (cmd->flags & MMC_RSP_PRESENT) { + if (cmd->flags & MMC_RSP_136) + c |= MCI_CPSM_LONGRSP; + c |= MCI_CPSM_RESPONSE; + } + + if (cmd->opcode == 17 || cmd->opcode == 18 || + cmd->opcode == 24 || cmd->opcode == 25 || + cmd->opcode == 53) + c |= MCI_CSPM_DATCMD; + + if (cmd == cmd->mrq->stop) + c |= MCI_CSPM_MCIABORT; + + host->curr.cmd = cmd; + + host->stats.cmds++; + + writel(cmd->arg, base + MMCIARGUMENT); + writel(c, base + MMCICOMMAND); +} + +static void +msmsdcc_data_err(struct msmsdcc_host *host, struct mmc_data *data, + unsigned int status) +{ + if (status & MCI_DATACRCFAIL) { + pr_err("%s: Data CRC error\n", mmc_hostname(host->mmc)); + pr_err("%s: opcode 0x%.8x\n", __func__, + data->mrq->cmd->opcode); + pr_err("%s: blksz %d, blocks %d\n", __func__, + data->blksz, data->blocks); + data->error = -EILSEQ; + } else if (status & MCI_DATATIMEOUT) { + pr_err("%s: Data timeout\n", mmc_hostname(host->mmc)); + data->error = -ETIMEDOUT; + } else if (status & MCI_RXOVERRUN) { + pr_err("%s: RX overrun\n", mmc_hostname(host->mmc)); + data->error = -EIO; + } else if (status & MCI_TXUNDERRUN) { + pr_err("%s: TX underrun\n", mmc_hostname(host->mmc)); + data->error = -EIO; + } else { + pr_err("%s: Unknown error (0x%.8x)\n", + mmc_hostname(host->mmc), status); + data->error = -EIO; + } +} + + +static int +msmsdcc_pio_read(struct msmsdcc_host *host, char *buffer, unsigned int remain) +{ + void __iomem *base = host->base; + uint32_t *ptr = (uint32_t *) buffer; + int count = 0; + + while (readl(base + MMCISTATUS) & MCI_RXDATAAVLBL) { + + *ptr = readl(base + MMCIFIFO + (count % MCI_FIFOSIZE)); + ptr++; + count += sizeof(uint32_t); + + remain -= sizeof(uint32_t); + if (remain == 0) + break; + } + return count; +} + +static int +msmsdcc_pio_write(struct msmsdcc_host *host, char *buffer, + unsigned int remain, u32 status) +{ + void __iomem *base = host->base; + char *ptr = buffer; + + do { + unsigned int count, maxcnt; + + maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE : + MCI_FIFOHALFSIZE; + count = min(remain, maxcnt); + + writesl(base + MMCIFIFO, ptr, count >> 2); + ptr += count; + remain -= count; + + if (remain == 0) + break; + + status = readl(base + MMCISTATUS); + } while (status & MCI_TXFIFOHALFEMPTY); + + return ptr - buffer; +} + +static int +msmsdcc_spin_on_status(struct msmsdcc_host *host, uint32_t mask, int maxspin) +{ + while (maxspin) { + if ((readl(host->base + MMCISTATUS) & mask)) + return 0; + udelay(1); + --maxspin; + } + return -ETIMEDOUT; +} + +static int +msmsdcc_pio_irq(int irq, void *dev_id) +{ + struct msmsdcc_host *host = dev_id; + void __iomem *base = host->base; + uint32_t status; + + status = readl(base + MMCISTATUS); + + do { + unsigned long flags; + unsigned int remain, len; + char *buffer; + + if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) { + if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll) + break; + + if (msmsdcc_spin_on_status(host, + (MCI_TXFIFOHALFEMPTY | + MCI_RXDATAAVLBL), + PIO_SPINMAX)) { + break; + } + } + + /* Map the current scatter buffer */ + local_irq_save(flags); + buffer = kmap_atomic(sg_page(host->pio.sg), + KM_BIO_SRC_IRQ) + host->pio.sg->offset; + buffer += host->pio.sg_off; + remain = host->pio.sg->length - host->pio.sg_off; + len = 0; + if (status & MCI_RXACTIVE) + len = msmsdcc_pio_read(host, buffer, remain); + if (status & MCI_TXACTIVE) + len = msmsdcc_pio_write(host, buffer, remain, status); + + /* Unmap the buffer */ + kunmap_atomic(buffer, KM_BIO_SRC_IRQ); + local_irq_restore(flags); + + host->pio.sg_off += len; + host->curr.xfer_remain -= len; + host->curr.data_xfered += len; + remain -= len; + + if (remain == 0) { + /* This sg page is full - do some housekeeping */ + if (status & MCI_RXACTIVE && host->curr.user_pages) + flush_dcache_page(sg_page(host->pio.sg)); + + if (!--host->pio.sg_len) { + memset(&host->pio, 0, sizeof(host->pio)); + break; + } + + /* Advance to next sg */ + host->pio.sg++; + host->pio.sg_off = 0; + } + + status = readl(base + MMCISTATUS); + } while (1); + + if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE) + writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1); + + if (!host->curr.xfer_remain) + writel(0, base + MMCIMASK1); + + return IRQ_HANDLED; +} + +static void msmsdcc_do_cmdirq(struct msmsdcc_host *host, uint32_t status) +{ + struct mmc_command *cmd = host->curr.cmd; + void __iomem *base = host->base; + + host->curr.cmd = NULL; + cmd->resp[0] = readl(base + MMCIRESPONSE0); + cmd->resp[1] = readl(base + MMCIRESPONSE1); + cmd->resp[2] = readl(base + MMCIRESPONSE2); + cmd->resp[3] = readl(base + MMCIRESPONSE3); + + del_timer(&host->command_timer); + if (status & MCI_CMDTIMEOUT) { + cmd->error = -ETIMEDOUT; + } else if (status & MCI_CMDCRCFAIL && + cmd->flags & MMC_RSP_CRC) { + pr_err("%s: Command CRC error\n", mmc_hostname(host->mmc)); + cmd->error = -EILSEQ; + } + + if (!cmd->data || cmd->error) { + if (host->curr.data && host->dma.sg) + msm_dmov_stop_cmd(host->dma.channel, + &host->dma.hdr, 0); + else if (host->curr.data) { /* Non DMA */ + msmsdcc_stop_data(host); + msmsdcc_request_end(host, cmd->mrq); + } else /* host->data == NULL */ + msmsdcc_request_end(host, cmd->mrq); + } else if (!(cmd->data->flags & MMC_DATA_READ)) + msmsdcc_start_data(host, cmd->data); +} + +static void +msmsdcc_handle_irq_data(struct msmsdcc_host *host, u32 status, + void __iomem *base) +{ + struct mmc_data *data = host->curr.data; + + if (!data) + return; + + /* Check for data errors */ + if (status & (MCI_DATACRCFAIL | MCI_DATATIMEOUT | + MCI_TXUNDERRUN | MCI_RXOVERRUN)) { + msmsdcc_data_err(host, data, status); + host->curr.data_xfered = 0; + if (host->dma.sg) + msm_dmov_stop_cmd(host->dma.channel, + &host->dma.hdr, 0); + else { + msmsdcc_stop_data(host); + if (!data->stop) + msmsdcc_request_end(host, data->mrq); + else + msmsdcc_start_command(host, data->stop, 0); + } + } + + /* Check for data done */ + if (!host->curr.got_dataend && (status & MCI_DATAEND)) + host->curr.got_dataend = 1; + + if (!host->curr.got_datablkend && (status & MCI_DATABLOCKEND)) + host->curr.got_datablkend = 1; + + /* + * If DMA is still in progress, we complete via the completion handler + */ + if (host->curr.got_dataend && host->curr.got_datablkend && + !host->dma.busy) { + /* + * There appears to be an issue in the controller where + * if you request a small block transfer (< fifo size), + * you may get your DATAEND/DATABLKEND irq without the + * PIO data irq. + * + * Check to see if there is still data to be read, + * and simulate a PIO irq. + */ + if (readl(base + MMCISTATUS) & MCI_RXDATAAVLBL) + msmsdcc_pio_irq(1, host); + + msmsdcc_stop_data(host); + if (!data->error) + host->curr.data_xfered = host->curr.xfer_size; + + if (!data->stop) + msmsdcc_request_end(host, data->mrq); + else + msmsdcc_start_command(host, data->stop, 0); + } +} + +static irqreturn_t +msmsdcc_irq(int irq, void *dev_id) +{ + struct msmsdcc_host *host = dev_id; + void __iomem *base = host->base; + u32 status; + int ret = 0; + int cardint = 0; + + spin_lock(&host->lock); + + do { + status = readl(base + MMCISTATUS); + + status &= (readl(base + MMCIMASK0) | MCI_DATABLOCKENDMASK); + writel(status, base + MMCICLEAR); + + msmsdcc_handle_irq_data(host, status, base); + + if (status & (MCI_CMDSENT | MCI_CMDRESPEND | MCI_CMDCRCFAIL | + MCI_CMDTIMEOUT) && host->curr.cmd) { + msmsdcc_do_cmdirq(host, status); + } + + if (status & MCI_SDIOINTOPER) { + cardint = 1; + status &= ~MCI_SDIOINTOPER; + } + ret = 1; + } while (status); + + spin_unlock(&host->lock); + + /* + * We have to delay handling the card interrupt as it calls + * back into the driver. + */ + if (cardint) + mmc_signal_sdio_irq(host->mmc); + + return IRQ_RETVAL(ret); +} + +static void +msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct msmsdcc_host *host = mmc_priv(mmc); + unsigned long flags; + + WARN_ON(host->curr.mrq != NULL); + WARN_ON(host->pwr == 0); + + spin_lock_irqsave(&host->lock, flags); + + host->stats.reqs++; + + if (host->eject) { + if (mrq->data && !(mrq->data->flags & MMC_DATA_READ)) { + mrq->cmd->error = 0; + mrq->data->bytes_xfered = mrq->data->blksz * + mrq->data->blocks; + } else + mrq->cmd->error = -ENOMEDIUM; + + spin_unlock_irqrestore(&host->lock, flags); + mmc_request_done(mmc, mrq); + return; + } + + host->curr.mrq = mrq; + + if (mrq->data && mrq->data->flags & MMC_DATA_READ) + msmsdcc_start_data(host, mrq->data); + + msmsdcc_start_command(host, mrq->cmd, 0); + + if (host->cmdpoll && !msmsdcc_spin_on_status(host, + MCI_CMDRESPEND|MCI_CMDCRCFAIL|MCI_CMDTIMEOUT, + CMD_SPINMAX)) { + uint32_t status = readl(host->base + MMCISTATUS); + msmsdcc_do_cmdirq(host, status); + writel(MCI_CMDRESPEND | MCI_CMDCRCFAIL | MCI_CMDTIMEOUT, + host->base + MMCICLEAR); + host->stats.cmdpoll_hits++; + } else { + host->stats.cmdpoll_misses++; + mod_timer(&host->command_timer, jiffies + HZ); + } + spin_unlock_irqrestore(&host->lock, flags); +} + +static void +msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct msmsdcc_host *host = mmc_priv(mmc); + u32 clk = 0, pwr = 0; + int rc; + + if (ios->clock) { + + if (!host->clks_on) { + clk_enable(host->pclk); + clk_enable(host->clk); + host->clks_on = 1; + } + if (ios->clock != host->clk_rate) { + rc = clk_set_rate(host->clk, ios->clock); + if (rc < 0) + pr_err("%s: Error setting clock rate (%d)\n", + mmc_hostname(host->mmc), rc); + else + host->clk_rate = ios->clock; + } + clk |= MCI_CLK_ENABLE; + } + + if (ios->bus_width == MMC_BUS_WIDTH_4) + clk |= (2 << 10); /* Set WIDEBUS */ + + if (ios->clock > 400000 && msmsdcc_pwrsave) + clk |= (1 << 9); /* PWRSAVE */ + + clk |= (1 << 12); /* FLOW_ENA */ + clk |= (1 << 15); /* feedback clock */ + + if (host->plat->translate_vdd) + pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd); + + switch (ios->power_mode) { + case MMC_POWER_OFF: + htc_pwrsink_set(PWRSINK_SDCARD, 0); + break; + case MMC_POWER_UP: + pwr |= MCI_PWR_UP; + break; + case MMC_POWER_ON: + htc_pwrsink_set(PWRSINK_SDCARD, 100); + pwr |= MCI_PWR_ON; + break; + } + + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) + pwr |= MCI_OD; + + writel(clk, host->base + MMCICLOCK); + + if (host->pwr != pwr) { + host->pwr = pwr; + writel(pwr, host->base + MMCIPOWER); + } + + if (!(clk & MCI_CLK_ENABLE) && host->clks_on) { + clk_disable(host->clk); + clk_disable(host->pclk); + host->clks_on = 0; + } +} + +static void msmsdcc_enable_sdio_irq(struct mmc_host *mmc, int enable) +{ + struct msmsdcc_host *host = mmc_priv(mmc); + unsigned long flags; + u32 status; + + spin_lock_irqsave(&host->lock, flags); + if (msmsdcc_sdioirq == 1) { + status = readl(host->base + MMCIMASK0); + if (enable) + status |= MCI_SDIOINTOPERMASK; + else + status &= ~MCI_SDIOINTOPERMASK; + host->saved_irq0mask = status; + writel(status, host->base + MMCIMASK0); + } + spin_unlock_irqrestore(&host->lock, flags); +} + +static const struct mmc_host_ops msmsdcc_ops = { + .request = msmsdcc_request, + .set_ios = msmsdcc_set_ios, + .enable_sdio_irq = msmsdcc_enable_sdio_irq, +}; + +static void +msmsdcc_check_status(unsigned long data) +{ + struct msmsdcc_host *host = (struct msmsdcc_host *)data; + unsigned int status; + + if (!host->plat->status) { + mmc_detect_change(host->mmc, 0); + goto out; + } + + status = host->plat->status(mmc_dev(host->mmc)); + host->eject = !status; + if (status ^ host->oldstat) { + pr_info("%s: Slot status change detected (%d -> %d)\n", + mmc_hostname(host->mmc), host->oldstat, status); + if (status) + mmc_detect_change(host->mmc, (5 * HZ) / 2); + else + mmc_detect_change(host->mmc, 0); + } + + host->oldstat = status; + +out: + if (host->timer.function) + mod_timer(&host->timer, jiffies + HZ); +} + +static irqreturn_t +msmsdcc_platform_status_irq(int irq, void *dev_id) +{ + struct msmsdcc_host *host = dev_id; + + printk(KERN_DEBUG "%s: %d\n", __func__, irq); + msmsdcc_check_status((unsigned long) host); + return IRQ_HANDLED; +} + +static void +msmsdcc_status_notify_cb(int card_present, void *dev_id) +{ + struct msmsdcc_host *host = dev_id; + + printk(KERN_DEBUG "%s: card_present %d\n", mmc_hostname(host->mmc), + card_present); + msmsdcc_check_status((unsigned long) host); +} + +/* + * called when a command expires. + * Dump some debugging, and then error + * out the transaction. + */ +static void +msmsdcc_command_expired(unsigned long _data) +{ + struct msmsdcc_host *host = (struct msmsdcc_host *) _data; + struct mmc_request *mrq; + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + mrq = host->curr.mrq; + + if (!mrq) { + pr_info("%s: Command expiry misfire\n", + mmc_hostname(host->mmc)); + spin_unlock_irqrestore(&host->lock, flags); + return; + } + + pr_err("%s: Command timeout (%p %p %p %p)\n", + mmc_hostname(host->mmc), mrq, mrq->cmd, + mrq->data, host->dma.sg); + + mrq->cmd->error = -ETIMEDOUT; + msmsdcc_stop_data(host); + + writel(0, host->base + MMCICOMMAND); + + host->curr.mrq = NULL; + host->curr.cmd = NULL; + + spin_unlock_irqrestore(&host->lock, flags); + mmc_request_done(host->mmc, mrq); +} + +static int +msmsdcc_init_dma(struct msmsdcc_host *host) +{ + memset(&host->dma, 0, sizeof(struct msmsdcc_dma_data)); + host->dma.host = host; + host->dma.channel = -1; + + if (!host->dmares) + return -ENODEV; + + host->dma.nc = dma_alloc_coherent(NULL, + sizeof(struct msmsdcc_nc_dmadata), + &host->dma.nc_busaddr, + GFP_KERNEL); + if (host->dma.nc == NULL) { + pr_err("Unable to allocate DMA buffer\n"); + return -ENOMEM; + } + memset(host->dma.nc, 0x00, sizeof(struct msmsdcc_nc_dmadata)); + host->dma.cmd_busaddr = host->dma.nc_busaddr; + host->dma.cmdptr_busaddr = host->dma.nc_busaddr + + offsetof(struct msmsdcc_nc_dmadata, cmdptr); + host->dma.channel = host->dmares->start; + + return 0; +} + +#ifdef CONFIG_MMC_MSM7X00A_RESUME_IN_WQ +static void +do_resume_work(struct work_struct *work) +{ + struct msmsdcc_host *host = + container_of(work, struct msmsdcc_host, resume_task); + struct mmc_host *mmc = host->mmc; + + if (mmc) { + mmc_resume_host(mmc); + if (host->stat_irq) + enable_irq(host->stat_irq); + } +} +#endif + +static int +msmsdcc_probe(struct platform_device *pdev) +{ + struct mmc_platform_data *plat = pdev->dev.platform_data; + struct msmsdcc_host *host; + struct mmc_host *mmc; + struct resource *cmd_irqres = NULL; + struct resource *pio_irqres = NULL; + struct resource *stat_irqres = NULL; + struct resource *memres = NULL; + struct resource *dmares = NULL; + int ret; + + /* must have platform data */ + if (!plat) { + pr_err("%s: Platform data not available\n", __func__); + ret = -EINVAL; + goto out; + } + + if (pdev->id < 1 || pdev->id > 4) + return -EINVAL; + + if (pdev->resource == NULL || pdev->num_resources < 2) { + pr_err("%s: Invalid resource\n", __func__); + return -ENXIO; + } + + memres = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0); + cmd_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ, + "cmd_irq"); + pio_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ, + "pio_irq"); + stat_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ, + "status_irq"); + + if (!cmd_irqres || !pio_irqres || !memres) { + pr_err("%s: Invalid resource\n", __func__); + return -ENXIO; + } + + /* + * Setup our host structure + */ + + mmc = mmc_alloc_host(sizeof(struct msmsdcc_host), &pdev->dev); + if (!mmc) { + ret = -ENOMEM; + goto out; + } + + host = mmc_priv(mmc); + host->pdev_id = pdev->id; + host->plat = plat; + host->mmc = mmc; + + host->cmdpoll = 1; + + host->base = ioremap(memres->start, PAGE_SIZE); + if (!host->base) { + ret = -ENOMEM; + goto out; + } + + host->cmd_irqres = cmd_irqres; + host->pio_irqres = pio_irqres; + host->memres = memres; + host->dmares = dmares; + spin_lock_init(&host->lock); + + /* + * Setup DMA + */ + msmsdcc_init_dma(host); + + /* + * Setup main peripheral bus clock + */ + host->pclk = clk_get(&pdev->dev, "sdc_pclk"); + if (IS_ERR(host->pclk)) { + ret = PTR_ERR(host->pclk); + goto host_free; + } + + ret = clk_enable(host->pclk); + if (ret) + goto pclk_put; + + host->pclk_rate = clk_get_rate(host->pclk); + + /* + * Setup SDC MMC clock + */ + host->clk = clk_get(&pdev->dev, "sdc_clk"); + if (IS_ERR(host->clk)) { + ret = PTR_ERR(host->clk); + goto pclk_disable; + } + + ret = clk_enable(host->clk); + if (ret) + goto clk_put; + + ret = clk_set_rate(host->clk, msmsdcc_fmin); + if (ret) { + pr_err("%s: Clock rate set failed (%d)\n", __func__, ret); + goto clk_disable; + } + + host->clk_rate = clk_get_rate(host->clk); + + host->clks_on = 1; + + /* + * Setup MMC host structure + */ + mmc->ops = &msmsdcc_ops; + mmc->f_min = msmsdcc_fmin; + mmc->f_max = msmsdcc_fmax; + mmc->ocr_avail = plat->ocr_mask; + + if (msmsdcc_4bit) + mmc->caps |= MMC_CAP_4_BIT_DATA; + if (msmsdcc_sdioirq) + mmc->caps |= MMC_CAP_SDIO_IRQ; + mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED; + + mmc->max_phys_segs = NR_SG; + mmc->max_hw_segs = NR_SG; + mmc->max_blk_size = 4096; /* MCI_DATA_CTL BLOCKSIZE up to 4096 */ + mmc->max_blk_count = 65536; + + mmc->max_req_size = 33554432; /* MCI_DATA_LENGTH is 25 bits */ + mmc->max_seg_size = mmc->max_req_size; + + writel(0, host->base + MMCIMASK0); + writel(0x5e007ff, host->base + MMCICLEAR); /* Add: 1 << 25 */ + + writel(MCI_IRQENABLE, host->base + MMCIMASK0); + host->saved_irq0mask = MCI_IRQENABLE; + + /* + * Setup card detect change + */ + + memset(&host->timer, 0, sizeof(host->timer)); + + if (stat_irqres && !(stat_irqres->flags & IORESOURCE_DISABLED)) { + unsigned long irqflags = IRQF_SHARED | + (stat_irqres->flags & IRQF_TRIGGER_MASK); + + host->stat_irq = stat_irqres->start; + ret = request_irq(host->stat_irq, + msmsdcc_platform_status_irq, + irqflags, + DRIVER_NAME " (slot)", + host); + if (ret) { + pr_err("%s: Unable to get slot IRQ %d (%d)\n", + mmc_hostname(mmc), host->stat_irq, ret); + goto clk_disable; + } + } else if (plat->register_status_notify) { + plat->register_status_notify(msmsdcc_status_notify_cb, host); + } else if (!plat->status) + pr_err("%s: No card detect facilities available\n", + mmc_hostname(mmc)); + else { + init_timer(&host->timer); + host->timer.data = (unsigned long)host; + host->timer.function = msmsdcc_check_status; + host->timer.expires = jiffies + HZ; + add_timer(&host->timer); + } + + if (plat->status) { + host->oldstat = host->plat->status(mmc_dev(host->mmc)); + host->eject = !host->oldstat; + } + + /* + * Setup a command timer. We currently need this due to + * some 'strange' timeout / error handling situations. + */ + init_timer(&host->command_timer); + host->command_timer.data = (unsigned long) host; + host->command_timer.function = msmsdcc_command_expired; + + ret = request_irq(cmd_irqres->start, msmsdcc_irq, IRQF_SHARED, + DRIVER_NAME " (cmd)", host); + if (ret) + goto stat_irq_free; + + ret = request_irq(pio_irqres->start, msmsdcc_pio_irq, IRQF_SHARED, + DRIVER_NAME " (pio)", host); + if (ret) + goto cmd_irq_free; + + mmc_set_drvdata(pdev, mmc); + mmc_add_host(mmc); + + pr_info("%s: Qualcomm MSM SDCC at 0x%016llx irq %d,%d dma %d\n", + mmc_hostname(mmc), (unsigned long long)memres->start, + (unsigned int) cmd_irqres->start, + (unsigned int) host->stat_irq, host->dma.channel); + pr_info("%s: 4 bit data mode %s\n", mmc_hostname(mmc), + (mmc->caps & MMC_CAP_4_BIT_DATA ? "enabled" : "disabled")); + pr_info("%s: MMC clock %u -> %u Hz, PCLK %u Hz\n", + mmc_hostname(mmc), msmsdcc_fmin, msmsdcc_fmax, host->pclk_rate); + pr_info("%s: Slot eject status = %d\n", mmc_hostname(mmc), host->eject); + pr_info("%s: Power save feature enable = %d\n", + mmc_hostname(mmc), msmsdcc_pwrsave); + + if (host->dma.channel != -1) { + pr_info("%s: DM non-cached buffer at %p, dma_addr 0x%.8x\n", + mmc_hostname(mmc), host->dma.nc, host->dma.nc_busaddr); + pr_info("%s: DM cmd busaddr 0x%.8x, cmdptr busaddr 0x%.8x\n", + mmc_hostname(mmc), host->dma.cmd_busaddr, + host->dma.cmdptr_busaddr); + } else + pr_info("%s: PIO transfer enabled\n", mmc_hostname(mmc)); + if (host->timer.function) + pr_info("%s: Polling status mode enabled\n", mmc_hostname(mmc)); + + return 0; + cmd_irq_free: + free_irq(cmd_irqres->start, host); + stat_irq_free: + if (host->stat_irq) + free_irq(host->stat_irq, host); + clk_disable: + clk_disable(host->clk); + clk_put: + clk_put(host->clk); + pclk_disable: + clk_disable(host->pclk); + pclk_put: + clk_put(host->pclk); + host_free: + mmc_free_host(mmc); + out: + return ret; +} + +static int +msmsdcc_suspend(struct platform_device *dev, pm_message_t state) +{ + struct mmc_host *mmc = mmc_get_drvdata(dev); + int rc = 0; + + if (mmc) { + struct msmsdcc_host *host = mmc_priv(mmc); + + if (host->stat_irq) + disable_irq(host->stat_irq); + + if (mmc->card && mmc->card->type != MMC_TYPE_SDIO) + rc = mmc_suspend_host(mmc, state); + if (!rc) { + writel(0, host->base + MMCIMASK0); + + if (host->clks_on) { + clk_disable(host->clk); + clk_disable(host->pclk); + host->clks_on = 0; + } + } + } + return rc; +} + +static int +msmsdcc_resume(struct platform_device *dev) +{ + struct mmc_host *mmc = mmc_get_drvdata(dev); + unsigned long flags; + + if (mmc) { + struct msmsdcc_host *host = mmc_priv(mmc); + + spin_lock_irqsave(&host->lock, flags); + + if (!host->clks_on) { + clk_enable(host->pclk); + clk_enable(host->clk); + host->clks_on = 1; + } + + writel(host->saved_irq0mask, host->base + MMCIMASK0); + + spin_unlock_irqrestore(&host->lock, flags); + + if (mmc->card && mmc->card->type != MMC_TYPE_SDIO) + mmc_resume_host(mmc); + if (host->stat_irq) + enable_irq(host->stat_irq); + else if (host->stat_irq) + enable_irq(host->stat_irq); + } + return 0; +} + +static struct platform_driver msmsdcc_driver = { + .probe = msmsdcc_probe, + .suspend = msmsdcc_suspend, + .resume = msmsdcc_resume, + .driver = { + .name = "msm_sdcc", + }, +}; + +static int __init msmsdcc_init(void) +{ + return platform_driver_register(&msmsdcc_driver); +} + +static void __exit msmsdcc_exit(void) +{ + platform_driver_unregister(&msmsdcc_driver); +} + +module_init(msmsdcc_init); +module_exit(msmsdcc_exit); + +MODULE_DESCRIPTION("Qualcomm MSM 7X00A Multimedia Card Interface driver"); +MODULE_LICENSE("GPL"); |
