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 v1:
-modified the caps2 field access per controller index.Reported
by Jaehoon Chung <jh80.chung@xxxxxxxxxxx>.
-replaced the pointer to device with the pointer to platform
device in struct dw_mci.
-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 <girish.shivananjappa@xxxxxxxxxx>
---
drivers/mmc/host/dw_mmc-pltfm.c | 10 +++-
drivers/mmc/host/dw_mmc.c | 150 ++++++++++++++++++++++++---------------
drivers/mmc/host/dw_mmc.h | 1 +
include/linux/mmc/dw_mmc.h | 2 +-
include/linux/mmc/host.h | 1 +
5 files changed, 106 insertions(+), 58 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index 900f412..c8eb573 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_caps2[4] = {
+ MMC_CAP2_CONFIG_BROKEN,
+ MMC_CAP2_CONFIG_BROKEN,
+ MMC_CAP2_CONFIG_BROKEN,
+ MMC_CAP2_CONFIG_BROKEN,
+};
+
static struct dw_mci_drv_data exynos5250_drv_data = {
.ctrl_type = DW_MCI_TYPE_EXYNOS5250,
.caps = exynos5250_dwmmc_caps,
+ .caps2 = exynos5250_dwmmc_caps2,
};
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..fd9233d 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;
+ int i, dma_support, ctrl_id;
+ struct device *dev = &host->pdev->dev;
/* Number of descriptors in the ring buffer */
host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc);
@@ -431,14 +452,23 @@ 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
+ */
+ ctrl_id = dw_get_platform_device_id(host);
+
+ if ((!dma_support || dma_support > 2) &&
+ host->drv_data && host->drv_data->caps2 &&
+ !(host->drv_data->caps2[ctrl_id] & MMC_CAP2_CONFIG_BROKEN)) {
+ 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 +504,7 @@ 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 +525,7 @@ 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 +563,13 @@ 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 +580,7 @@ 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 +596,7 @@ 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 +961,7 @@ 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 +971,12 @@ 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 +1115,7 @@ 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 +1863,8 @@ 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 +1873,13 @@ 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 +1887,11 @@ 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 +1900,11 @@ 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 +1928,9 @@ 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;
@@ -1923,23 +1959,23 @@ 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];
if (host->pdata->caps2)
mmc->caps2 = host->pdata->caps2;
+ if (host->drv_data->caps2)
+ mmc->caps2 |= host->drv_data->caps2[ctrl_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 +2066,12 @@ 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 +2087,12 @@ 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 +2100,7 @@ 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 +2146,7 @@ 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;
@@ -2169,30 +2206,31 @@ int dw_mci_probe(struct dw_mci *host)
int width, i, 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 +2240,7 @@ 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;
@@ -2243,7 +2281,7 @@ 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 +2338,15 @@ 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 +2356,7 @@ 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 +2373,12 @@ 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 +2391,7 @@ 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 +2415,23 @@ 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 +2489,7 @@ 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;
}
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 6c17282..8c4810a 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 *caps2;
};
#endif /* _DW_MMC_H_ */
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index 32c778f..71de160 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;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 79d8921..b3e35fd 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -273,6 +273,7 @@ struct mmc_host {
#define MMC_CAP2_PACKED_WR (1 << 21) /* Allow packed write */
#define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
MMC_CAP2_PACKED_WR) /* Allow packed commands */
+#define MMC_CAP2_CONFIG_BROKEN (1 << 22) /* Broken Config Register */
mmc_pm_flag_t pm_caps; /* supported pm features */
unsigned int power_notify_type;
--
1.7.4.1
--
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