From 43934ece2ea72c1dd279c0b0478c1a036d5d77ee Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Mon, 14 Sep 2015 12:18:55 +0200 Subject: mmc: core: Don't return an error for CD/WP GPIOs when GPIOLIB is unset When CONFIG_GPIOLIB is unset, its stubs will return -ENOSYS. That means when the mmc core parses DT for CD/WP GPIOs via mmc_of_parse(), -ENOSYS becomes propagated to the caller. Typically this means that the mmc host driver fails to probe. As the CD/WP GPIOs are already treated as optional, let's extend that to cover the case when CONFIG_GPIOLIB is unset. Reported-by: Michal Simek Fixes: 16b23787fc70 ("mmc: sdhci-of-arasan: Call OF parsing for MMC") Signed-off-by: Ulf Hansson Tested-by: Michal Simek Acked-by: Venu Byravarasu diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index abd933b..5466f25 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -457,7 +457,7 @@ int mmc_of_parse(struct mmc_host *host) 0, &cd_gpio_invert); if (!ret) dev_info(host->parent, "Got CD GPIO\n"); - else if (ret != -ENOENT) + else if (ret != -ENOENT && ret != -ENOSYS) return ret; /* @@ -481,7 +481,7 @@ int mmc_of_parse(struct mmc_host *host) ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &ro_gpio_invert); if (!ret) dev_info(host->parent, "Got WP GPIO\n"); - else if (ret != -ENOENT) + else if (ret != -ENOENT && ret != -ENOSYS) return ret; if (of_property_read_bool(np, "disable-wp")) -- cgit v0.10.2 From 51424b2860670ec20e1dd5177fe70ab4b6fd7a5b Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 23 Sep 2015 22:06:48 +0200 Subject: mmc: sunxi: Fix clk-delay settings In recent allwinner kernel sources the mmc clk-delay settings have been slightly tweaked, and for sun9i they are completely different then what we are using. This commit brings us in sync with what allwinner does, fixing problems accessing sdcards on some A33 devices (and likely others). For pre sun9i hardware this makes the following changes: -At 400Khz change the sample delay from 7 to 0 (introduced in A31 sdk) -At 50 Mhz change the sample delay from 5 to 4 (introduced in A23 sdk) This also drops the clk-delay calculation for clocks > 50 MHz, we do not need this as we've: mmc->f_max = 50000000, and the delays in the old code were not correct (at 100 MHz the delay must be a multiple of 60, at 200 MHz a multiple of 120). Signed-off-by: Hans de Goede Signed-off-by: Ulf Hansson diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index a7b7a67..b981b85 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -210,6 +210,16 @@ #define SDXC_IDMAC_DES0_CES BIT(30) /* card error summary */ #define SDXC_IDMAC_DES0_OWN BIT(31) /* 1-idma owns it, 0-host owns it */ +#define SDXC_CLK_400K 0 +#define SDXC_CLK_25M 1 +#define SDXC_CLK_50M 2 +#define SDXC_CLK_50M_DDR 3 + +struct sunxi_mmc_clk_delay { + u32 output; + u32 sample; +}; + struct sunxi_idma_des { u32 config; u32 buf_size; @@ -229,6 +239,7 @@ struct sunxi_mmc_host { struct clk *clk_mmc; struct clk *clk_sample; struct clk *clk_output; + const struct sunxi_mmc_clk_delay *clk_delays; /* irq */ spinlock_t lock; @@ -654,25 +665,19 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, /* determine delays */ if (rate <= 400000) { - oclk_dly = 180; - sclk_dly = 42; + oclk_dly = host->clk_delays[SDXC_CLK_400K].output; + sclk_dly = host->clk_delays[SDXC_CLK_400K].sample; } else if (rate <= 25000000) { - oclk_dly = 180; - sclk_dly = 75; + oclk_dly = host->clk_delays[SDXC_CLK_25M].output; + sclk_dly = host->clk_delays[SDXC_CLK_25M].sample; } else if (rate <= 50000000) { if (ios->timing == MMC_TIMING_UHS_DDR50) { - oclk_dly = 60; - sclk_dly = 120; + oclk_dly = host->clk_delays[SDXC_CLK_50M_DDR].output; + sclk_dly = host->clk_delays[SDXC_CLK_50M_DDR].sample; } else { - oclk_dly = 90; - sclk_dly = 150; + oclk_dly = host->clk_delays[SDXC_CLK_50M].output; + sclk_dly = host->clk_delays[SDXC_CLK_50M].sample; } - } else if (rate <= 100000000) { - oclk_dly = 6; - sclk_dly = 24; - } else if (rate <= 200000000) { - oclk_dly = 3; - sclk_dly = 12; } else { return -EINVAL; } @@ -871,6 +876,7 @@ static void sunxi_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) static const struct of_device_id sunxi_mmc_of_match[] = { { .compatible = "allwinner,sun4i-a10-mmc", }, { .compatible = "allwinner,sun5i-a13-mmc", }, + { .compatible = "allwinner,sun9i-a80-mmc", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match); @@ -884,6 +890,20 @@ static struct mmc_host_ops sunxi_mmc_ops = { .hw_reset = sunxi_mmc_hw_reset, }; +static const struct sunxi_mmc_clk_delay sunxi_mmc_clk_delays[] = { + [SDXC_CLK_400K] = { .output = 180, .sample = 180 }, + [SDXC_CLK_25M] = { .output = 180, .sample = 75 }, + [SDXC_CLK_50M] = { .output = 90, .sample = 120 }, + [SDXC_CLK_50M_DDR] = { .output = 60, .sample = 120 }, +}; + +static const struct sunxi_mmc_clk_delay sun9i_mmc_clk_delays[] = { + [SDXC_CLK_400K] = { .output = 180, .sample = 180 }, + [SDXC_CLK_25M] = { .output = 180, .sample = 75 }, + [SDXC_CLK_50M] = { .output = 150, .sample = 120 }, + [SDXC_CLK_50M_DDR] = { .output = 90, .sample = 120 }, +}; + static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, struct platform_device *pdev) { @@ -895,6 +915,11 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, else host->idma_des_size_bits = 16; + if (of_device_is_compatible(np, "allwinner,sun9i-a80-mmc")) + host->clk_delays = sun9i_mmc_clk_delays; + else + host->clk_delays = sunxi_mmc_clk_delays; + ret = mmc_regulator_get_supply(host->mmc); if (ret) { if (ret != -EPROBE_DEFER) -- cgit v0.10.2 From fd546ee6a7dc4b71ebc6d1205bf72ea3c1c7030a Mon Sep 17 00:00:00 2001 From: Robert Jarzmik Date: Sat, 26 Sep 2015 21:41:01 +0200 Subject: mmc: pxamci: fix card detect with slot-gpio API Move pxamci to mmc slot-gpio API to fix interrupt request. It fixes the case where the card detection is on a gpio expander, on I2C for example on zylonite board. In this case, the card detect netsted interrupt is called from a threaded interrupt. The request_irq() fails, because a hard irq cannot be a nested interrupt from a threaded interrupt (set __setup_irq()). This was tested on zylonite and mioa701 boards. Signed-off-by: Robert Jarzmik Cc: Petr Cvek Signed-off-by: Ulf Hansson diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c index 1420f29..8cadd74 100644 --- a/drivers/mmc/host/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include #include @@ -454,12 +455,8 @@ static int pxamci_get_ro(struct mmc_host *mmc) { struct pxamci_host *host = mmc_priv(mmc); - if (host->pdata && gpio_is_valid(host->pdata->gpio_card_ro)) { - if (host->pdata->gpio_card_ro_invert) - return !gpio_get_value(host->pdata->gpio_card_ro); - else - return gpio_get_value(host->pdata->gpio_card_ro); - } + if (host->pdata && gpio_is_valid(host->pdata->gpio_card_ro)) + return mmc_gpio_get_ro(mmc); if (host->pdata && host->pdata->get_ro) return !!host->pdata->get_ro(mmc_dev(mmc)); /* @@ -551,6 +548,7 @@ static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable) static const struct mmc_host_ops pxamci_ops = { .request = pxamci_request, + .get_cd = mmc_gpio_get_cd, .get_ro = pxamci_get_ro, .set_ios = pxamci_set_ios, .enable_sdio_irq = pxamci_enable_sdio_irq, @@ -790,37 +788,31 @@ static int pxamci_probe(struct platform_device *pdev) gpio_power = host->pdata->gpio_power; } if (gpio_is_valid(gpio_power)) { - ret = gpio_request(gpio_power, "mmc card power"); + ret = devm_gpio_request(&pdev->dev, gpio_power, + "mmc card power"); if (ret) { - dev_err(&pdev->dev, "Failed requesting gpio_power %d\n", gpio_power); + dev_err(&pdev->dev, "Failed requesting gpio_power %d\n", + gpio_power); goto out; } gpio_direction_output(gpio_power, host->pdata->gpio_power_invert); } - if (gpio_is_valid(gpio_ro)) { - ret = gpio_request(gpio_ro, "mmc card read only"); - if (ret) { - dev_err(&pdev->dev, "Failed requesting gpio_ro %d\n", gpio_ro); - goto err_gpio_ro; - } - gpio_direction_input(gpio_ro); + if (gpio_is_valid(gpio_ro)) + ret = mmc_gpio_request_ro(mmc, gpio_ro); + if (ret) { + dev_err(&pdev->dev, "Failed requesting gpio_ro %d\n", gpio_ro); + goto out; + } else { + mmc->caps |= host->pdata->gpio_card_ro_invert ? + MMC_CAP2_RO_ACTIVE_HIGH : 0; } - if (gpio_is_valid(gpio_cd)) { - ret = gpio_request(gpio_cd, "mmc card detect"); - if (ret) { - dev_err(&pdev->dev, "Failed requesting gpio_cd %d\n", gpio_cd); - goto err_gpio_cd; - } - gpio_direction_input(gpio_cd); - ret = request_irq(gpio_to_irq(gpio_cd), pxamci_detect_irq, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - "mmc card detect", mmc); - if (ret) { - dev_err(&pdev->dev, "failed to request card detect IRQ\n"); - goto err_request_irq; - } + if (gpio_is_valid(gpio_cd)) + ret = mmc_gpio_request_cd(mmc, gpio_cd, 0); + if (ret) { + dev_err(&pdev->dev, "Failed requesting gpio_cd %d\n", gpio_cd); + goto out; } if (host->pdata && host->pdata->init) @@ -835,13 +827,7 @@ static int pxamci_probe(struct platform_device *pdev) return 0; -err_request_irq: - gpio_free(gpio_cd); -err_gpio_cd: - gpio_free(gpio_ro); -err_gpio_ro: - gpio_free(gpio_power); - out: +out: if (host) { if (host->dma_chan_rx) dma_release_channel(host->dma_chan_rx); @@ -873,14 +859,6 @@ static int pxamci_remove(struct platform_device *pdev) gpio_ro = host->pdata->gpio_card_ro; gpio_power = host->pdata->gpio_power; } - if (gpio_is_valid(gpio_cd)) { - free_irq(gpio_to_irq(gpio_cd), mmc); - gpio_free(gpio_cd); - } - if (gpio_is_valid(gpio_ro)) - gpio_free(gpio_ro); - if (gpio_is_valid(gpio_power)) - gpio_free(gpio_power); if (host->vcc) regulator_put(host->vcc); -- cgit v0.10.2 From 031277d4d33d33f0174fbb569ca8f68238175617 Mon Sep 17 00:00:00 2001 From: Chaotian Jing Date: Wed, 30 Sep 2015 17:37:18 +0800 Subject: mmc: core: fix dead loop of mmc_retune When get a CRC error, start the mmc_retune, it will issue CMD19/CMD21 to do tune, assume there were 10 clock phase need to try, phase 0 to phase 6 is ok, phase 7 to phase 9 is NG, we try it from 0 to 9, so the last CMD19/CMD21 will get CRC error, host->need_retune was set and cause mmc_retune was called, then dead loop of mmc_retune Signed-off-by: Chaotian Jing Acked-by: Adrian Hunter Fixes: bd11e8bd03ca ("mmc: core: Flag re-tuning is needed on CRC errors") Signed-off-by: Ulf Hansson diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 0520064..a3eb20b 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -134,9 +134,11 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) int err = cmd->error; /* Flag re-tuning needed on CRC errors */ - if (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || + if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && + cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && + (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || (mrq->data && mrq->data->error == -EILSEQ) || - (mrq->stop && mrq->stop->error == -EILSEQ)) + (mrq->stop && mrq->stop->error == -EILSEQ))) mmc_retune_needed(host); if (err && cmd->retries && mmc_host_is_spi(host)) { -- cgit v0.10.2