Hi Girish, July 23, 2012, Girish K S <[email protected]> wrote: > In some Soc'S that integrate Designware mmc host controllers, the > HCON register is broken. The hardware configuration is not > updated. One specific usecase is the IDMAC. In Exysons5 SoC > there exist a internal DMA, but the HCON register's DMA_INTERFACE > field is not set to indicate its existance. > > This quirk can be used in such case to force the existance broken > HCON field. > > changes in v2: > -moved the implementation to quirk framework as per venkat's > review comment. > changes in v1: > -modified the caps2 field access per controller index.Reported > by Jaehoon Chung <[email protected]>. > -replaced the pointer to device with the pointer to platform > device in struct dw_mci. Change related to adding pointer of platform_device is needed in this patch seriously? I guess that the purpose is to get id of platform_device in case of non-dt. Although a lot of replace is done throughout dw_mmc, actual usage is only in dw_get_platform_device_id. You can split it into another patch if this change is needed, or it's good to use other way. For example, to_platform_device macro is useful to get pointer of platform_device.
Best regards, Seungwon Jeon > -updated driver data for all 4 mmc controllers of exynos5 SoC. > -added non device-tree support for ctrl_id access. > > Signed-off-by: Girish K S <[email protected]> > --- > drivers/mmc/host/dw_mmc-pltfm.c | 10 +++- > drivers/mmc/host/dw_mmc.c | 151 > ++++++++++++++++++++++++--------------- > drivers/mmc/host/dw_mmc.h | 1 + > include/linux/mmc/dw_mmc.h | 4 +- > 4 files changed, 107 insertions(+), 59 deletions(-) > > diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c > index 900f412..7d31e90 100644 > --- a/drivers/mmc/host/dw_mmc-pltfm.c > +++ b/drivers/mmc/host/dw_mmc-pltfm.c > @@ -35,9 +35,17 @@ static unsigned long exynos5250_dwmmc_caps[4] = { > MMC_CAP_CMD23, > }; > > +static unsigned long exynos5250_dwmmc_quirks[4] = { > + DW_MCI_QUIRK_NO_HCON_DMA_INFO, > + DW_MCI_QUIRK_NO_HCON_DMA_INFO, > + DW_MCI_QUIRK_NO_HCON_DMA_INFO, > + DW_MCI_QUIRK_NO_HCON_DMA_INFO, > +}; > + > static struct dw_mci_drv_data exynos5250_drv_data = { > .ctrl_type = DW_MCI_TYPE_EXYNOS5250, > .caps = exynos5250_dwmmc_caps, > + .quirks = exynos5250_dwmmc_quirks, > }; > > static const struct of_device_id dw_mci_pltfm_match[] = { > @@ -74,7 +82,7 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev) > goto err_free; > } > > - host->dev = &pdev->dev; > + host->pdev = pdev; > host->irq_flags = 0; > host->pdata = pdev->dev.platform_data; > ret = -ENOMEM; > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c > index 000da16..b32e200 100644 > --- a/drivers/mmc/host/dw_mmc.c > +++ b/drivers/mmc/host/dw_mmc.c > @@ -283,8 +283,10 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, > struct mmc_command *cmd) > static void dw_mci_start_command(struct dw_mci *host, > struct mmc_command *cmd, u32 cmd_flags) > { > + struct device *dev = &host->pdev->dev; > + > host->cmd = cmd; > - dev_vdbg(host->dev, > + dev_vdbg(dev, > "start command: ARGR=0x%08x CMDR=0x%08x\n", > cmd->arg, cmd_flags); > > @@ -323,10 +325,11 @@ static int dw_mci_get_dma_dir(struct mmc_data *data) > static void dw_mci_dma_cleanup(struct dw_mci *host) > { > struct mmc_data *data = host->data; > + struct device *dev = &host->pdev->dev; > > if (data) > if (!data->host_cookie) > - dma_unmap_sg(host->dev, > + dma_unmap_sg(dev, > data->sg, > data->sg_len, > dw_mci_get_dma_dir(data)); > @@ -351,8 +354,9 @@ static void dw_mci_idmac_stop_dma(struct dw_mci *host) > static void dw_mci_idmac_complete_dma(struct dw_mci *host) > { > struct mmc_data *data = host->data; > + struct device *dev = &host->pdev->dev; > > - dev_vdbg(host->dev, "DMA complete\n"); > + dev_vdbg(dev, "DMA complete\n"); > > host->dma_ops->cleanup(host); > > @@ -420,10 +424,27 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, > unsigned int sg_len) > mci_writel(host, PLDMND, 1); > } > > +static int dw_get_platform_device_id(struct dw_mci *host) > +{ > + int ctrl_id; > + struct device *dev = &host->pdev->dev; > + > + if (dev->of_node) > + ctrl_id = of_alias_get_id(dev->of_node, "mshc"); > + else > + ctrl_id = host->pdev->id; > + > + if (ctrl_id < 0) > + ctrl_id = 0; > + > + return ctrl_id; > +} > + > static int dw_mci_idmac_init(struct dw_mci *host) > { > struct idmac_desc *p; > int i, dma_support; > + struct device *dev = &host->pdev->dev; > > /* Number of descriptors in the ring buffer */ > host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); > @@ -431,14 +452,20 @@ static int dw_mci_idmac_init(struct dw_mci *host) > /* Check if Hardware Configuration Register has support for DMA */ > dma_support = (mci_readl(host, HCON) >> 16) & 0x3; > > - if (!dma_support || dma_support > 2) { > - dev_err(&host->dev, > + /* > + * In Some of the Soc's the HCON Register is broken. Even though the > + * Soc's has a internal DMA the HCON register's DMA field doesnt > + * show it. So additional quirk is added for such Soc's > + */ > + if ((!dma_support || dma_support > 2) && > + !(host->quirks & DW_MCI_QUIRK_NO_HCON_DMA_INFO)) { > + dev_err(dev, > "Host Controller does not support IDMA Tx.\n"); > host->dma_ops = NULL; > return -ENODEV; > } > > - dev_info(&host->dev, "Using internal DMA controller.\n"); > + dev_info(dev, "Using internal DMA controller.\n"); > > /* Forward link the descriptor list */ > for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) > @@ -474,6 +501,7 @@ static int dw_mci_pre_dma_transfer(struct dw_mci *host, > { > struct scatterlist *sg; > unsigned int i, sg_len; > + struct device *dev = &host->pdev->dev; > > if (!next && data->host_cookie) > return data->host_cookie; > @@ -494,7 +522,7 @@ static int dw_mci_pre_dma_transfer(struct dw_mci *host, > return -EINVAL; > } > > - sg_len = dma_map_sg(host->dev, > + sg_len = dma_map_sg(dev, > data->sg, > data->sg_len, > dw_mci_get_dma_dir(data)); > @@ -532,12 +560,13 @@ static void dw_mci_post_req(struct mmc_host *mmc, > { > struct dw_mci_slot *slot = mmc_priv(mmc); > struct mmc_data *data = mrq->data; > + struct device *dev = &slot->host->pdev->dev; > > if (!slot->host->use_dma || !data) > return; > > if (data->host_cookie) > - dma_unmap_sg(slot->host->dev, > + dma_unmap_sg(dev, > data->sg, > data->sg_len, > dw_mci_get_dma_dir(data)); > @@ -548,6 +577,7 @@ static int dw_mci_submit_data_dma(struct dw_mci *host, > struct mmc_data *data) > { > int sg_len; > u32 temp; > + struct device *dev = &host->pdev->dev; > > host->using_dma = 0; > > @@ -563,7 +593,7 @@ static int dw_mci_submit_data_dma(struct dw_mci *host, > struct mmc_data *data) > > host->using_dma = 1; > > - dev_vdbg(host->dev, > + dev_vdbg(dev, > "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", > (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, > sg_len); > @@ -928,6 +958,7 @@ static void dw_mci_request_end(struct dw_mci *host, > struct mmc_request *mrq) > { > struct dw_mci_slot *slot; > struct mmc_host *prev_mmc = host->cur_slot->mmc; > + struct device *dev = &host->pdev->dev; > > WARN_ON(host->cmd || host->data); > > @@ -937,12 +968,12 @@ static void dw_mci_request_end(struct dw_mci *host, > struct mmc_request *mrq) > slot = list_entry(host->queue.next, > struct dw_mci_slot, queue_node); > list_del(&slot->queue_node); > - dev_vdbg(host->dev, "list not empty: %s is next\n", > + dev_vdbg(dev, "list not empty: %s is next\n", > mmc_hostname(slot->mmc)); > host->state = STATE_SENDING_CMD; > dw_mci_start_request(host, slot); > } else { > - dev_vdbg(host->dev, "list empty\n"); > + dev_vdbg(dev, "list empty\n"); > host->state = STATE_IDLE; > } > > @@ -1081,7 +1112,7 @@ static void dw_mci_tasklet_func(unsigned long priv) > data->bytes_xfered = 0; > data->error = -ETIMEDOUT; > } else { > - dev_err(host->dev, > + dev_err(&host->pdev->dev, > "data FIFO error " > "(status=%08x)\n", > status); > @@ -1829,7 +1860,8 @@ static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 > slot) > > static int dw_mci_of_setup_bus(struct dw_mci *host, u8 slot, u32 bus_wd) > { > - struct device_node *np = dw_mci_of_find_slot_node(host->dev, slot); > + struct device *dev = &host->pdev->dev; > + struct device_node *np = dw_mci_of_find_slot_node(dev, slot); > int idx, gpio, ret; > > if (!np) > @@ -1838,13 +1870,13 @@ static int dw_mci_of_setup_bus(struct dw_mci *host, > u8 slot, u32 bus_wd) > for (idx = 0; idx < NUM_PINS(bus_wd); idx++) { > gpio = of_get_gpio(np, idx); > if (!gpio_is_valid(gpio)) { > - dev_err(host->dev, "invalid gpio: %d\n", gpio); > + dev_err(dev, "invalid gpio: %d\n", gpio); > return -EINVAL; > } > > - ret = devm_gpio_request(host->dev, gpio, "dw-mci-bus"); > + ret = devm_gpio_request(dev, gpio, "dw-mci-bus"); > if (ret) { > - dev_err(host->dev, "gpio [%d] request failed\n", gpio); > + dev_err(dev, "gpio [%d] request failed\n", gpio); > return -EBUSY; > } > } > @@ -1852,11 +1884,11 @@ static int dw_mci_of_setup_bus(struct dw_mci *host, > u8 slot, u32 bus_wd) > host->slot[slot]->wp_gpio = -1; > gpio = of_get_named_gpio(np, "wp-gpios", 0); > if (!gpio_is_valid(gpio)) { > - dev_info(host->dev, "wp gpio not available"); > + dev_info(dev, "wp gpio not available"); > } else { > - ret = devm_gpio_request(host->dev, gpio, "dw-mci-wp"); > + ret = devm_gpio_request(dev, gpio, "dw-mci-wp"); > if (ret) > - dev_info(host->dev, "gpio [%d] request failed\n", > + dev_info(dev, "gpio [%d] request failed\n", > gpio); > else > host->slot[slot]->wp_gpio = gpio; > @@ -1865,11 +1897,11 @@ static int dw_mci_of_setup_bus(struct dw_mci *host, > u8 slot, u32 bus_wd) > host->slot[slot]->cd_gpio = -1; > gpio = of_get_named_gpio(np, "cd-gpios", 0); > if (!gpio_is_valid(gpio)) { > - dev_info(host->dev, "cd gpio not available"); > + dev_info(dev, "cd gpio not available"); > } else { > - ret = devm_gpio_request(host->dev, gpio, "dw-mci-cd"); > + ret = devm_gpio_request(dev, gpio, "dw-mci-cd"); > if (ret) > - dev_err(host->dev, "gpio [%d] request failed\n", gpio); > + dev_err(dev, "gpio [%d] request failed\n", gpio); > else > host->slot[slot]->cd_gpio = gpio; > } > @@ -1893,8 +1925,9 @@ static int __init dw_mci_init_slot(struct dw_mci *host, > unsigned int id) > struct mmc_host *mmc; > struct dw_mci_slot *slot; > int ctrl_id, ret; > + struct device *dev = &host->pdev->dev; > > - mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); > + mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), dev); > if (!mmc) > return -ENOMEM; > > @@ -1923,11 +1956,8 @@ static int __init dw_mci_init_slot(struct dw_mci > *host, unsigned int id) > if (host->pdata->caps) > mmc->caps = host->pdata->caps; > > - if (host->dev->of_node) { > - ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); > - if (ctrl_id < 0) > - ctrl_id = 0; > - } > + ctrl_id = dw_get_platform_device_id(host); > + > if (host->drv_data->caps) > mmc->caps |= host->drv_data->caps[ctrl_id]; > > @@ -1937,9 +1967,9 @@ static int __init dw_mci_init_slot(struct dw_mci *host, > unsigned int id) > if (host->pdata->get_bus_wd) { > if (host->pdata->get_bus_wd(slot->id) >= 4) > mmc->caps |= MMC_CAP_4_BIT_DATA; > - } else if (host->dev->of_node) { > + } else if (dev->of_node) { > unsigned int bus_width; > - bus_width = dw_mci_of_get_bus_wd(host->dev, slot->id); > + bus_width = dw_mci_of_get_bus_wd(dev, slot->id); > switch (bus_width) { > case 8: > mmc->caps |= MMC_CAP_8_BIT_DATA; > @@ -2030,11 +2060,12 @@ static void dw_mci_cleanup_slot(struct dw_mci_slot > *slot, unsigned int id) > > static void dw_mci_init_dma(struct dw_mci *host) > { > + struct device *dev = &host->pdev->dev; > /* Alloc memory for sg translation */ > - host->sg_cpu = dma_alloc_coherent(host->dev, PAGE_SIZE, > + host->sg_cpu = dma_alloc_coherent(dev, PAGE_SIZE, > &host->sg_dma, GFP_KERNEL); > if (!host->sg_cpu) { > - dev_err(host->dev, "%s: could not alloc DMA memory\n", > + dev_err(dev, "%s: could not alloc DMA memory\n", > __func__); > goto no_dma; > } > @@ -2050,12 +2081,12 @@ static void dw_mci_init_dma(struct dw_mci *host) > if (host->dma_ops->init && host->dma_ops->start && > host->dma_ops->stop && host->dma_ops->cleanup) { > if (host->dma_ops->init(host)) { > - dev_err(host->dev, "%s: Unable to initialize " > + dev_err(dev, "%s: Unable to initialize " > "DMA Controller.\n", __func__); > goto no_dma; > } > } else { > - dev_err(host->dev, "DMA initialization not found.\n"); > + dev_err(dev, "DMA initialization not found.\n"); > goto no_dma; > } > > @@ -2063,7 +2094,7 @@ static void dw_mci_init_dma(struct dw_mci *host) > return; > > no_dma: > - dev_info(host->dev, "Using PIO mode.\n"); > + dev_info(dev, "Using PIO mode.\n"); > host->use_dma = 0; > return; > } > @@ -2109,7 +2140,7 @@ static struct dw_mci_of_quirks { > static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) > { > struct dw_mci_board *pdata; > - struct device *dev = host->dev; > + struct device *dev = &host->pdev->dev; > struct device_node *np = dev->of_node; > u32 timing[3]; > int idx, cnt; > @@ -2166,33 +2197,34 @@ static struct dw_mci_board *dw_mci_parse_dt(struct > dw_mci *host) > > int dw_mci_probe(struct dw_mci *host) > { > - int width, i, ret = 0; > + int width, i, ctrl_id, ret = 0; > u32 fifo_size; > int init_slots = 0; > + struct device *dev = &host->pdev->dev; > > if (!host->pdata) { > host->pdata = dw_mci_parse_dt(host); > if (IS_ERR(host->pdata)) { > - dev_err(host->dev, "platform data not available\n"); > + dev_err(dev, "platform data not available\n"); > return -EINVAL; > } > } > > if (!host->pdata->select_slot && host->pdata->num_slots > 1) { > - dev_err(host->dev, > + dev_err(dev, > "Platform data must supply select_slot function\n"); > return -ENODEV; > } > > - host->biu_clk = clk_get(host->dev, "biu"); > + host->biu_clk = clk_get(dev, "biu"); > if (IS_ERR(host->biu_clk)) > - dev_dbg(host->dev, "biu clock not available\n"); > + dev_dbg(dev, "biu clock not available\n"); > else > clk_prepare_enable(host->biu_clk); > > - host->ciu_clk = clk_get(host->dev, "ciu"); > + host->ciu_clk = clk_get(dev, "ciu"); > if (IS_ERR(host->ciu_clk)) > - dev_dbg(host->dev, "ciu clock not available\n"); > + dev_dbg(dev, "ciu clock not available\n"); > else > clk_prepare_enable(host->ciu_clk); > > @@ -2202,7 +2234,7 @@ int dw_mci_probe(struct dw_mci *host) > host->bus_hz = clk_get_rate(host->ciu_clk); > > if (!host->bus_hz) { > - dev_err(host->dev, > + dev_err(dev, > "Platform data must supply bus speed\n"); > ret = -ENODEV; > goto err_clk; > @@ -2210,6 +2242,11 @@ int dw_mci_probe(struct dw_mci *host) > > host->quirks = host->pdata->quirks; > > + ctrl_id = dw_get_platform_device_id(host); > + > + if (host->drv_data->quirks) > + host->quirks |= host->drv_data->quirks[ctrl_id]; > + > spin_lock_init(&host->lock); > INIT_LIST_HEAD(&host->queue); > > @@ -2243,7 +2280,7 @@ int dw_mci_probe(struct dw_mci *host) > } > > /* Reset all blocks */ > - if (!mci_wait_reset(host->dev, host)) > + if (!mci_wait_reset(dev, host)) > return -ENODEV; > > host->dma_ops = host->pdata->dma_ops; > @@ -2300,15 +2337,15 @@ int dw_mci_probe(struct dw_mci *host) > for (i = 0; i < host->num_slots; i++) { > ret = dw_mci_init_slot(host, i); > if (ret) > - dev_dbg(host->dev, "slot %d init failed\n", i); > + dev_dbg(dev, "slot %d init failed\n", i); > else > init_slots++; > } > > if (init_slots) { > - dev_info(host->dev, "%d slots initialized\n", init_slots); > + dev_info(dev, "%d slots initialized\n", init_slots); > } else { > - dev_dbg(host->dev, "attempted to initialize %d slots, " > + dev_dbg(dev, "attempted to initialize %d slots, " > "but failed on all\n", host->num_slots); > goto err_init_slot; > } > @@ -2318,7 +2355,7 @@ int dw_mci_probe(struct dw_mci *host) > * Need to check the version-id and set data-offset for DATA register. > */ > host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); > - dev_info(host->dev, "Version ID is %04x\n", host->verid); > + dev_info(dev, "Version ID is %04x\n", host->verid); > > if (host->verid < DW_MMC_240A) > host->data_offset = DATA_OFFSET; > @@ -2335,12 +2372,12 @@ int dw_mci_probe(struct dw_mci *host) > DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); > mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt > */ > > - dev_info(host->dev, "DW MMC controller at irq %d, " > + dev_info(dev, "DW MMC controller at irq %d, " > "%d bit host data width, " > "%u deep fifo\n", > host->irq, width, fifo_size); > if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) > - dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n"); > + dev_info(dev, "Internal DMAC interrupt fix enabled.\n"); > > return 0; > > @@ -2353,7 +2390,7 @@ err_workqueue: > err_dmaunmap: > if (host->use_dma && host->dma_ops->exit) > host->dma_ops->exit(host); > - dma_free_coherent(host->dev, PAGE_SIZE, > + dma_free_coherent(dev, PAGE_SIZE, > host->sg_cpu, host->sg_dma); > > if (host->vmmc) { > @@ -2377,23 +2414,23 @@ EXPORT_SYMBOL(dw_mci_probe); > void dw_mci_remove(struct dw_mci *host) > { > int i; > + struct device *dev = &host->pdev->dev; > > mci_writel(host, RINTSTS, 0xFFFFFFFF); > mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ > > for (i = 0; i < host->num_slots; i++) { > - dev_dbg(host->dev, "remove slot %d\n", i); > + dev_dbg(dev, "remove slot %d\n", i); > if (host->slot[i]) > dw_mci_cleanup_slot(host->slot[i], i); > } > - > /* disable clock to CIU */ > mci_writel(host, CLKENA, 0); > mci_writel(host, CLKSRC, 0); > > free_irq(host->irq, host); > destroy_workqueue(host->card_workqueue); > - dma_free_coherent(host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); > + dma_free_coherent(dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); > > if (host->use_dma && host->dma_ops->exit) > host->dma_ops->exit(host); > @@ -2451,7 +2488,7 @@ int dw_mci_resume(struct dw_mci *host) > if (host->vmmc) > regulator_enable(host->vmmc); > > - if (!mci_wait_reset(host->dev, host)) { > + if (!mci_wait_reset(&host->pdev->dev, host)) { > ret = -ENODEV; > return ret; > } > @@ -2483,7 +2520,7 @@ EXPORT_SYMBOL(dw_mci_resume); > > static int __init dw_mci_init(void) > { > - printk(KERN_INFO "Synopsys Designware Multimedia Card Interface > Driver"); > + pr_info("Synopsys Designware Multimedia Card Interface Driver"); > return 0; > } > > diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h > index 6c17282..a3d684b 100644 > --- a/drivers/mmc/host/dw_mmc.h > +++ b/drivers/mmc/host/dw_mmc.h > @@ -203,6 +203,7 @@ extern int dw_mci_resume(struct dw_mci *host); > struct dw_mci_drv_data { > unsigned long ctrl_type; > unsigned long *caps; > + unsigned long *quirks; > }; > > #endif /* _DW_MMC_H_ */ > diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h > index 32c778f..03c409b 100644 > --- a/include/linux/mmc/dw_mmc.h > +++ b/include/linux/mmc/dw_mmc.h > @@ -161,7 +161,7 @@ struct dw_mci { > u32 fifoth_val; > u16 verid; > u16 data_offset; > - struct device *dev; > + struct platform_device *pdev; > struct dw_mci_board *pdata; > struct dw_mci_drv_data *drv_data; > struct clk *biu_clk; > @@ -215,6 +215,8 @@ struct dw_mci_dma_ops { > #define DW_MCI_QUIRK_BROKEN_CARD_DETECTION BIT(3) > /* Write Protect detection not available */ > #define DW_MCI_QUIRK_NO_WRITE_PROTECT BIT(4) > +/* HCON Register's IDMAC information broken */ > +#define DW_MCI_QUIRK_NO_HCON_DMA_INFO BIT(5) > > struct dma_pdata; > > -- > 1.7.4.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
