X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Fmmc%2Fhost%2Ftmio_mmc_pio.c;h=e487ba4bb01a746f384dba0ed9fce9f8dda4fc16;hb=52839bfb0c4b56b5c2688c96ce656df4034b2c87;hp=8d8abf23a61120a03555a9c3a90e9d7571431c15;hpb=ae693400bd2dd438f2bbacbb925233ba1dee9236;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index 8d8abf2..e487ba4 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -44,6 +44,7 @@ #include #include #include +#include #include #include #include @@ -129,19 +130,28 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) { struct tmio_mmc_host *host = mmc_priv(mmc); - if (enable) { + if (enable && !host->sdio_irq_enabled) { + /* Keep device active while SDIO irq is enabled */ + pm_runtime_get_sync(mmc_dev(mmc)); + host->sdio_irq_enabled = true; + host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ; sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); - } else { + } else if (!enable && host->sdio_irq_enabled) { host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); + + host->sdio_irq_enabled = false; + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); } } -static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) +static void tmio_mmc_set_clock(struct tmio_mmc_host *host, + unsigned int new_clock) { u32 clk = 0, clock; @@ -149,7 +159,11 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) for (clock = host->mmc->f_min, clk = 0x80000080; new_clock >= (clock<<1); clk >>= 1) clock <<= 1; - clk |= 0x100; + + /* 1/1 clock is option */ + if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && + ((clk >> 22) & 0x1)) + clk |= 0xff; } if (host->set_clk_div) @@ -245,6 +259,9 @@ static void tmio_mmc_reset_work(struct work_struct *work) tmio_mmc_abort_dma(host); mmc_request_done(host->mmc, mrq); + + pm_runtime_mark_last_busy(mmc_dev(host->mmc)); + pm_runtime_put_autosuspend(mmc_dev(host->mmc)); } /* called with host->lock held, interrupts disabled */ @@ -274,6 +291,9 @@ static void tmio_mmc_finish_request(struct tmio_mmc_host *host) tmio_mmc_abort_dma(host); mmc_request_done(host->mmc, mrq); + + pm_runtime_mark_last_busy(mmc_dev(host->mmc)); + pm_runtime_put_autosuspend(mmc_dev(host->mmc)); } static void tmio_mmc_done_work(struct work_struct *work) @@ -295,6 +315,7 @@ static void tmio_mmc_done_work(struct work_struct *work) #define TRANSFER_READ 0x1000 #define TRANSFER_MULTI 0x2000 #define SECURITY_CMD 0x4000 +#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd) { @@ -331,6 +352,14 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command if (data->blocks > 1) { sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100); c |= TRANSFER_MULTI; + + /* + * Disable auto CMD12 at IO_RW_EXTENDED when + * multiple block transfer + */ + if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) && + (cmd->opcode == SD_IO_RW_EXTENDED)) + c |= NO_CMD12_ISSUE; } if (data->flags & MMC_DATA_READ) c |= TRANSFER_READ; @@ -347,6 +376,40 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command return 0; } +static void tmio_mmc_transfer_data(struct tmio_mmc_host *host, + unsigned short *buf, + unsigned int count) +{ + int is_read = host->data->flags & MMC_DATA_READ; + u8 *buf8; + + /* + * Transfer the data + */ + if (is_read) + sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); + else + sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); + + /* if count was even number */ + if (!(count & 0x1)) + return; + + /* if count was odd number */ + buf8 = (u8 *)(buf + (count >> 1)); + + /* + * FIXME + * + * driver and this function are assuming that + * it is used as little endian + */ + if (is_read) + *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff; + else + sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8); +} + /* * This chip always returns (at least?) as much data as you ask for. * I'm unsure what happens if you ask for less than a block. This should be @@ -379,10 +442,7 @@ static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) count, host->sg_off, data->flags); /* Transfer the data */ - if (data->flags & MMC_DATA_READ) - sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); - else - sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); + tmio_mmc_transfer_data(host, buf, count); host->sg_off += count; @@ -465,6 +525,9 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host) goto out; if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { + u32 status = sd_ctrl_read32(host, CTL_STATUS); + bool done = false; + /* * Has all data been written out yet? Testing on SuperH showed, * that in most cases the first interrupt comes already with the @@ -473,7 +536,15 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host) * DATAEND interrupt with the BUSY bit set, in this cases * waiting for one more interrupt fixes the problem. */ - if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) { + if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) { + if (status & TMIO_STAT_ILL_FUNC) + done = true; + } else { + if (!(status & TMIO_STAT_CMD_BUSY)) + done = true; + } + + if (done) { tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); tasklet_schedule(&host->dma_complete); } @@ -557,6 +628,9 @@ static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host, pr_debug_status(*status); pr_debug_status(*ireg); + + /* Clear the status except the interrupt status */ + sd_ctrl_write32(host, CTL_STATUS, TMIO_MASK_IRQ); } static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, @@ -637,6 +711,7 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid) struct mmc_host *mmc = host->mmc; struct tmio_mmc_data *pdata = host->pdata; unsigned int ireg, status; + unsigned int sdio_status; if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) return IRQ_HANDLED; @@ -644,7 +719,11 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid) status = sd_ctrl_read16(host, CTL_SDIO_STATUS); ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask; - sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL); + sdio_status = status & ~TMIO_SDIO_MASK_ALL; + if (pdata->flags & TMIO_MMC_SDIO_STATUS_QUIRK) + sdio_status |= 6; + + sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) mmc_signal_sdio_irq(mmc); @@ -728,6 +807,8 @@ static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) spin_unlock_irqrestore(&host->lock, flags); + pm_runtime_get_sync(mmc_dev(mmc)); + if (mrq->data) { ret = tmio_mmc_start_data(host, mrq->data); if (ret) @@ -746,11 +827,14 @@ fail: host->mrq = NULL; mrq->cmd->error = ret; mmc_request_done(mmc, mrq); + + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); } -static int tmio_mmc_clk_update(struct mmc_host *mmc) +static int tmio_mmc_clk_update(struct tmio_mmc_host *host) { - struct tmio_mmc_host *host = mmc_priv(mmc); + struct mmc_host *mmc = host->mmc; struct tmio_mmc_data *pdata = host->pdata; int ret; @@ -812,6 +896,19 @@ static void tmio_mmc_power_off(struct tmio_mmc_host *host) host->set_pwr(host->pdev, 0); } +static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host, + unsigned char bus_width) +{ + switch (bus_width) { + case MMC_BUS_WIDTH_1: + sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0); + break; + case MMC_BUS_WIDTH_4: + sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0); + break; + } +} + /* Set MMC clock / power. * Note: This controller uses a simple divider scheme therefore it cannot * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as @@ -824,6 +921,8 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) struct device *dev = &host->pdev->dev; unsigned long flags; + pm_runtime_get_sync(mmc_dev(mmc)); + mutex_lock(&host->ios_lock); spin_lock_irqsave(&host->lock, flags); @@ -850,60 +949,22 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) spin_unlock_irqrestore(&host->lock, flags); - /* - * host->power toggles between false and true in both cases - either - * or not the controller can be runtime-suspended during inactivity. - * But if the controller has to be kept on, the runtime-pm usage_count - * is kept positive, so no suspending actually takes place. - */ - if (ios->power_mode == MMC_POWER_ON && ios->clock) { - if (host->power != TMIO_MMC_ON_RUN) { - tmio_mmc_clk_update(mmc); - pm_runtime_get_sync(dev); - if (host->resuming) { - tmio_mmc_reset(host); - host->resuming = false; - } - } - if (host->power == TMIO_MMC_OFF_STOP) - tmio_mmc_reset(host); + switch (ios->power_mode) { + case MMC_POWER_OFF: + tmio_mmc_power_off(host); + tmio_mmc_clk_stop(host); + break; + case MMC_POWER_UP: tmio_mmc_set_clock(host, ios->clock); - if (host->power == TMIO_MMC_OFF_STOP) - /* power up SD card and the bus */ - tmio_mmc_power_on(host, ios->vdd); - host->power = TMIO_MMC_ON_RUN; - /* start bus clock */ + tmio_mmc_power_on(host, ios->vdd); tmio_mmc_clk_start(host); - } else if (ios->power_mode != MMC_POWER_UP) { - struct tmio_mmc_data *pdata = host->pdata; - unsigned int old_power = host->power; - - if (old_power != TMIO_MMC_OFF_STOP) { - if (ios->power_mode == MMC_POWER_OFF) { - tmio_mmc_power_off(host); - host->power = TMIO_MMC_OFF_STOP; - } else { - host->power = TMIO_MMC_ON_STOP; - } - } - - if (old_power == TMIO_MMC_ON_RUN) { - tmio_mmc_clk_stop(host); - pm_runtime_put(dev); - if (pdata->clk_disable) - pdata->clk_disable(host->pdev); - } - } - - if (host->power != TMIO_MMC_OFF_STOP) { - switch (ios->bus_width) { - case MMC_BUS_WIDTH_1: - sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0); + tmio_mmc_set_bus_width(host, ios->bus_width); break; - case MMC_BUS_WIDTH_4: - sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0); + case MMC_POWER_ON: + tmio_mmc_set_clock(host, ios->clock); + tmio_mmc_clk_start(host); + tmio_mmc_set_bus_width(host, ios->bus_width); break; - } } /* Let things settle. delay taken from winCE driver */ @@ -915,7 +976,12 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) ios->clock, ios->power_mode); host->mrq = NULL; + host->clk_cache = ios->clock; + mutex_unlock(&host->ios_lock); + + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); } static int tmio_mmc_get_ro(struct mmc_host *mmc) @@ -926,8 +992,25 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc) if (ret >= 0) return ret; - return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || - (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); + pm_runtime_get_sync(mmc_dev(mmc)); + ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || + (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); + + return ret; +} + +static int tmio_multi_io_quirk(struct mmc_card *card, + unsigned int direction, int blk_size) +{ + struct tmio_mmc_host *host = mmc_priv(card->host); + struct tmio_mmc_data *pdata = host->pdata; + + if (pdata->multi_io_quirk) + return pdata->multi_io_quirk(card, direction, blk_size); + + return blk_size; } static const struct mmc_host_ops tmio_mmc_ops = { @@ -936,6 +1019,7 @@ static const struct mmc_host_ops tmio_mmc_ops = { .get_ro = tmio_mmc_get_ro, .get_cd = mmc_gpio_get_cd, .enable_sdio_irq = tmio_mmc_enable_sdio_irq, + .multi_io_quirk = tmio_multi_io_quirk, }; static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) @@ -1032,28 +1116,23 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host, mmc->caps & MMC_CAP_NONREMOVABLE || mmc->slot.cd_irq >= 0); - _host->power = TMIO_MMC_OFF_STOP; - pm_runtime_enable(&pdev->dev); - ret = pm_runtime_resume(&pdev->dev); - if (ret < 0) - goto pm_disable; - - if (tmio_mmc_clk_update(mmc) < 0) { + if (tmio_mmc_clk_update(_host) < 0) { mmc->f_max = pdata->hclk; mmc->f_min = mmc->f_max / 512; } /* - * There are 4 different scenarios for the card detection: - * 1) an external gpio irq handles the cd (best for power savings) - * 2) internal sdhi irq handles the cd - * 3) a worker thread polls the sdhi - indicated by MMC_CAP_NEEDS_POLL - * 4) the medium is non-removable - indicated by MMC_CAP_NONREMOVABLE - * - * While we increment the runtime PM counter for all scenarios when - * the mmc core activates us by calling an appropriate set_ios(), we - * must additionally ensure that in case 2) the tmio mmc hardware stays - * powered on during runtime for the card detection to work. + * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from + * looping forever... + */ + if (mmc->f_min == 0) { + ret = -EINVAL; + goto host_free; + } + + /* + * While using internal tmio hardware logic for card detection, we need + * to ensure it stays powered for it to work. */ if (_host->native_hotplug) pm_runtime_get_noresume(&pdev->dev); @@ -1074,8 +1153,12 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host, _host->sdcard_irq_mask &= ~irq_mask; - if (pdata->flags & TMIO_MMC_SDIO_IRQ) - tmio_mmc_enable_sdio_irq(mmc, 0); + _host->sdio_irq_enabled = false; + if (pdata->flags & TMIO_MMC_SDIO_IRQ) { + _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; + sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask); + sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0000); + } spin_lock_init(&_host->lock); mutex_init(&_host->ios_lock); @@ -1087,9 +1170,12 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host, /* See if we also get DMA */ tmio_mmc_request_dma(_host, pdata); + pm_runtime_set_active(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 50); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_enable(&pdev->dev); + ret = mmc_add_host(mmc); - if (pdata->clk_disable) - pdata->clk_disable(pdev); if (ret < 0) { tmio_mmc_host_remove(_host); return ret; @@ -1109,9 +1195,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host, return 0; -pm_disable: - pm_runtime_disable(&pdev->dev); - iounmap(_host->ctl); host_free: mmc_free_host(mmc); @@ -1143,33 +1226,19 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host) EXPORT_SYMBOL(tmio_mmc_host_remove); #ifdef CONFIG_PM -int tmio_mmc_host_suspend(struct device *dev) +int tmio_mmc_host_runtime_suspend(struct device *dev) { struct mmc_host *mmc = dev_get_drvdata(dev); struct tmio_mmc_host *host = mmc_priv(mmc); tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); - return 0; -} -EXPORT_SYMBOL(tmio_mmc_host_suspend); - -int tmio_mmc_host_resume(struct device *dev) -{ - struct mmc_host *mmc = dev_get_drvdata(dev); - struct tmio_mmc_host *host = mmc_priv(mmc); - tmio_mmc_enable_dma(host, true); - - /* The MMC core will perform the complete set up */ - host->resuming = true; - return 0; -} -EXPORT_SYMBOL(tmio_mmc_host_resume); + if (host->clk_cache) + tmio_mmc_clk_stop(host); -#endif /* CONFIG_PM */ + if (host->pdata->clk_disable) + host->pdata->clk_disable(host->pdev); -int tmio_mmc_host_runtime_suspend(struct device *dev) -{ return 0; } EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend); @@ -1179,10 +1248,19 @@ int tmio_mmc_host_runtime_resume(struct device *dev) struct mmc_host *mmc = dev_get_drvdata(dev); struct tmio_mmc_host *host = mmc_priv(mmc); + tmio_mmc_reset(host); + tmio_mmc_clk_update(host); + + if (host->clk_cache) { + tmio_mmc_set_clock(host, host->clk_cache); + tmio_mmc_clk_start(host); + } + tmio_mmc_enable_dma(host, true); return 0; } EXPORT_SYMBOL(tmio_mmc_host_runtime_resume); +#endif MODULE_LICENSE("GPL v2");