[PATCH -next] mmc: sdhci-pci-gli: Add CQHCI Support for GL9763E
From: Ben Chuang
Date: Mon Oct 05 2020 - 06:54:29 EST
From: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
Add CQHCI initialization and implement CQHCI operations for GL9763E.
Use bit19 of the register (0x888) to decide whether to disable command
queuing. If the bit is set, the command queuing will be disabled.
Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-pci-gli.c | 150 ++++++++++++++++++++++++++++++-
1 file changed, 148 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 5da2b06d84ae..9887485a4134 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -14,6 +14,7 @@
#include <linux/delay.h>
#include "sdhci.h"
#include "sdhci-pci.h"
+#include "cqhci.h"
/* Genesys Logic extra registers */
#define SDHCI_GLI_9750_WT 0x800
@@ -81,9 +82,16 @@
#define GLI_9763E_VHS_REV_R 0x0
#define GLI_9763E_VHS_REV_M 0x1
#define GLI_9763E_VHS_REV_W 0x2
+#define PCIE_GLI_9763E_MB 0x888
+#define GLI_9763E_MB_CMDQ_OFF BIT(19)
#define PCIE_GLI_9763E_SCR 0x8E0
#define GLI_9763E_SCR_AXI_REQ BIT(9)
+#define SDHCI_GLI_9763E_CQE_BASE_ADDR 0x200
+#define GLI_9763E_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \
+ SDHCI_TRNS_BLK_CNT_EN | \
+ SDHCI_TRNS_DMA)
+
#define PCI_GLI_9755_WT 0x800
#define PCI_GLI_9755_WT_EN BIT(0)
#define GLI_9755_WT_EN_ON 0x1
@@ -578,6 +586,30 @@ static int sdhci_pci_gli_resume(struct sdhci_pci_chip *chip)
return sdhci_pci_resume_host(chip);
}
+
+static int sdhci_cqhci_gli_resume(struct sdhci_pci_chip *chip)
+{
+ struct sdhci_pci_slot *slot = chip->slots[0];
+ int ret;
+
+ ret = sdhci_pci_gli_resume(chip);
+ if (ret)
+ return ret;
+
+ return cqhci_resume(slot->host->mmc);
+}
+
+static int sdhci_cqhci_gli_suspend(struct sdhci_pci_chip *chip)
+{
+ struct sdhci_pci_slot *slot = chip->slots[0];
+ int ret;
+
+ ret = cqhci_suspend(slot->host->mmc);
+ if (ret)
+ return ret;
+
+ return sdhci_suspend_host(slot->host);
+}
#endif
static void gl9763e_hs400_enhanced_strobe(struct mmc_host *mmc,
@@ -614,6 +646,110 @@ static void sdhci_set_gl9763e_signaling(struct sdhci_host *host,
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
+static void sdhci_gl9763e_dumpregs(struct mmc_host *mmc)
+{
+ sdhci_dumpregs(mmc_priv(mmc));
+}
+
+static void sdhci_gl9763e_cqe_pre_enable(struct mmc_host *mmc)
+{
+ struct cqhci_host *cq_host = mmc->cqe_private;
+ u32 value;
+
+ value = cqhci_readl(cq_host, CQHCI_CFG);
+ value |= CQHCI_ENABLE;
+ cqhci_writel(cq_host, value, CQHCI_CFG);
+}
+
+static void sdhci_gl9763e_cqe_enable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ sdhci_writew(host, GLI_9763E_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
+ sdhci_cqe_enable(mmc);
+}
+
+static u32 sdhci_gl9763e_cqhci_irq(struct sdhci_host *host, u32 intmask)
+{
+ int cmd_error = 0;
+ int data_error = 0;
+
+ if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+ return intmask;
+
+ cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+
+ return 0;
+}
+
+static void sdhci_gl9763e_cqe_post_disable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct cqhci_host *cq_host = mmc->cqe_private;
+ u32 value;
+
+ value = cqhci_readl(cq_host, CQHCI_CFG);
+ value &= ~CQHCI_ENABLE;
+ cqhci_writel(cq_host, value, CQHCI_CFG);
+ sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
+}
+
+static const struct cqhci_host_ops sdhci_gl9763e_cqhci_ops = {
+ .enable = sdhci_gl9763e_cqe_enable,
+ .disable = sdhci_cqe_disable,
+ .dumpregs = sdhci_gl9763e_dumpregs,
+ .pre_enable = sdhci_gl9763e_cqe_pre_enable,
+ .post_disable = sdhci_gl9763e_cqe_post_disable,
+};
+
+static int gl9763e_add_host(struct sdhci_pci_slot *slot)
+{
+ struct device *dev = &slot->chip->pdev->dev;
+ struct sdhci_host *host = slot->host;
+ struct cqhci_host *cq_host;
+ bool dma64;
+ int ret;
+
+ ret = sdhci_setup_host(host);
+ if (ret)
+ return ret;
+
+ cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
+ if (!cq_host) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ cq_host->mmio = host->ioaddr + SDHCI_GLI_9763E_CQE_BASE_ADDR;
+ cq_host->ops = &sdhci_gl9763e_cqhci_ops;
+
+ dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
+ if (dma64)
+ cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
+
+ ret = cqhci_init(cq_host, host->mmc, dma64);
+ if (ret)
+ goto cleanup;
+
+ ret = __sdhci_add_host(host);
+ if (ret)
+ goto cleanup;
+
+ return 0;
+
+cleanup:
+ sdhci_cleanup_host(host);
+ return ret;
+}
+
+static void sdhci_gl9763e_reset(struct sdhci_host *host, u8 mask)
+{
+ if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL) &&
+ host->mmc->cqe_private)
+ cqhci_deactivate(host->mmc);
+ sdhci_reset(host, mask);
+}
+
static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
{
struct pci_dev *pdev = slot->chip->pdev;
@@ -636,7 +772,9 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot)
{
+ struct pci_dev *pdev = slot->chip->pdev;
struct sdhci_host *host = slot->host;
+ u32 value;
host->mmc->caps |= MMC_CAP_8_BIT_DATA |
MMC_CAP_1_8V_DDR |
@@ -646,6 +784,11 @@ static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot)
MMC_CAP2_HS400_ES |
MMC_CAP2_NO_SDIO |
MMC_CAP2_NO_SD;
+
+ pci_read_config_dword(pdev, PCIE_GLI_9763E_MB, &value);
+ if (!(value & GLI_9763E_MB_CMDQ_OFF))
+ host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
+
gli_pcie_enable_msi(slot);
host->mmc_host_ops.hs400_enhanced_strobe =
gl9763e_hs400_enhanced_strobe;
@@ -699,9 +842,10 @@ static const struct sdhci_ops sdhci_gl9763e_ops = {
.set_clock = sdhci_set_clock,
.enable_dma = sdhci_pci_enable_dma,
.set_bus_width = sdhci_set_bus_width,
- .reset = sdhci_reset,
+ .reset = sdhci_gl9763e_reset,
.set_uhs_signaling = sdhci_set_gl9763e_signaling,
.voltage_switch = sdhci_gli_voltage_switch,
+ .irq = sdhci_gl9763e_cqhci_irq,
};
const struct sdhci_pci_fixes sdhci_gl9763e = {
@@ -709,6 +853,8 @@ const struct sdhci_pci_fixes sdhci_gl9763e = {
.probe_slot = gli_probe_slot_gl9763e,
.ops = &sdhci_gl9763e_ops,
#ifdef CONFIG_PM_SLEEP
- .resume = sdhci_pci_gli_resume,
+ .resume = sdhci_cqhci_gli_resume,
+ .suspend = sdhci_cqhci_gli_suspend,
#endif
+ .add_host = gl9763e_add_host,
};
--
2.28.0