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Subject[PATCH 3/9] Revert "mmc: dw_mmc: use the 'slot' instead of 'cur_slot'"
Date
This reverts commit 42f989c002f235557e3a03feac3b2f16b17d53f6.

The Mellanox BlueField SoC requires multiple slot dw-mmc support.

Signed-off-by: Liming Sun <lsun@mellanox.com>
---
drivers/mmc/host/dw_mmc-exynos.c | 4 ++--
drivers/mmc/host/dw_mmc.c | 33 +++++++++++++++++----------------
drivers/mmc/host/dw_mmc.h | 3 +++
3 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 3502679..25691cc 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -157,8 +157,8 @@ static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing)
* HOLD register should be bypassed in case there is no phase shift
* applied on CMD/DATA that is sent to the card.
*/
- if (!SDMMC_CLKSEL_GET_DRV_WD3(clksel) && host->slot)
- set_bit(DW_MMC_CARD_NO_USE_HOLD, &host->slot->flags);
+ if (!SDMMC_CLKSEL_GET_DRV_WD3(clksel) && host->cur_slot)
+ set_bit(DW_MMC_CARD_NO_USE_HOLD, &host->cur_slot->flags);
}

#ifdef CONFIG_PM
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index c9f81db..62c0791 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -392,7 +392,7 @@ static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd)
cmdr = stop->opcode | SDMMC_CMD_STOP |
SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP;

- if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &host->slot->flags))
+ if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &host->cur_slot->flags))
cmdr |= SDMMC_CMD_USE_HOLD_REG;

return cmdr;
@@ -499,7 +499,7 @@ static void dw_mci_dmac_complete_dma(void *arg)
if ((host->use_dma == TRANS_MODE_EDMAC) &&
data && (data->flags & MMC_DATA_READ))
/* Invalidate cache after read */
- dma_sync_sg_for_cpu(mmc_dev(host->slot->mmc),
+ dma_sync_sg_for_cpu(mmc_dev(host->cur_slot->mmc),
data->sg,
data->sg_len,
DMA_FROM_DEVICE);
@@ -839,7 +839,7 @@ static int dw_mci_edmac_start_dma(struct dw_mci *host,

/* Flush cache before write */
if (host->data->flags & MMC_DATA_WRITE)
- dma_sync_sg_for_device(mmc_dev(host->slot->mmc), sgl,
+ dma_sync_sg_for_device(mmc_dev(host->cur_slot->mmc), sgl,
sg_elems, DMA_TO_DEVICE);

dma_async_issue_pending(host->dms->ch);
@@ -1301,6 +1301,7 @@ static void __dw_mci_start_request(struct dw_mci *host,

mrq = slot->mrq;

+ host->cur_slot = slot;
host->mrq = mrq;

host->pending_events = 0;
@@ -1781,7 +1782,7 @@ static bool dw_mci_reset(struct dw_mci *host)

ciu_out:
/* After a CTRL reset we need to have CIU set clock registers */
- mci_send_cmd(host->slot, SDMMC_CMD_UPD_CLK, 0);
+ mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0);

return ret;
}
@@ -1808,11 +1809,11 @@ static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq)
__acquires(&host->lock)
{
struct dw_mci_slot *slot;
- struct mmc_host *prev_mmc = host->slot->mmc;
+ struct mmc_host *prev_mmc = host->cur_slot->mmc;

WARN_ON(host->cmd || host->data);

- host->slot->mrq = NULL;
+ host->cur_slot->mrq = NULL;
host->mrq = NULL;
if (!list_empty(&host->queue)) {
slot = list_entry(host->queue.next,
@@ -1962,7 +1963,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
err = dw_mci_command_complete(host, cmd);
if (cmd == mrq->sbc && !err) {
prev_state = state = STATE_SENDING_CMD;
- __dw_mci_start_request(host, host->slot,
+ __dw_mci_start_request(host, host->cur_slot,
mrq->cmd);
goto unlock;
}
@@ -3308,9 +3309,9 @@ int dw_mci_runtime_suspend(struct device *dev)

clk_disable_unprepare(host->ciu_clk);

- if (host->slot &&
- (mmc_can_gpio_cd(host->slot->mmc) ||
- !mmc_card_is_removable(host->slot->mmc)))
+ if (host->cur_slot &&
+ (mmc_can_gpio_cd(host->cur_slot->mmc) ||
+ !mmc_card_is_removable(host->cur_slot->mmc)))
clk_disable_unprepare(host->biu_clk);

return 0;
@@ -3323,9 +3324,9 @@ int dw_mci_runtime_resume(struct device *dev)
struct dw_mci *host = dev_get_drvdata(dev);
struct dw_mci_slot *slot = host->slot;

- if (host->slot &&
- (mmc_can_gpio_cd(host->slot->mmc) ||
- !mmc_card_is_removable(host->slot->mmc))) {
+ if (host->cur_slot &&
+ (mmc_can_gpio_cd(host->cur_slot->mmc) ||
+ !mmc_card_is_removable(host->cur_slot->mmc))) {
ret = clk_prepare_enable(host->biu_clk);
if (ret)
return ret;
@@ -3373,9 +3374,9 @@ int dw_mci_runtime_resume(struct device *dev)
return 0;

err:
- if (host->slot &&
- (mmc_can_gpio_cd(host->slot->mmc) ||
- !mmc_card_is_removable(host->slot->mmc)))
+ if (host->cur_slot &&
+ (mmc_can_gpio_cd(host->cur_slot->mmc) ||
+ !mmc_card_is_removable(host->cur_slot->mmc)))
clk_disable_unprepare(host->biu_clk);

return ret;
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 34474ad..20a956e 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -133,6 +133,7 @@ struct dw_mci_dma_slave {
* =======
*
* @lock is a softirq-safe spinlock protecting @queue as well as
+ * @cur_slot, @mrq and @state. These must always be updated
* at the same time while holding @lock.
*
* @irq_lock is an irq-safe spinlock protecting the INTMASK register
@@ -168,6 +169,7 @@ struct dw_mci {
struct scatterlist *sg;
struct sg_mapping_iter sg_miter;

+ struct dw_mci_slot *cur_slot;
struct mmc_request *mrq;
struct mmc_command *cmd;
struct mmc_data *data;
@@ -203,6 +205,7 @@ struct dw_mci {

u32 bus_hz;
u32 current_speed;
+ u32 num_slots;
u32 fifoth_val;
u16 verid;
struct device *dev;
--
1.8.3.1
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