[PATCH V20 22/22] mmc: sdhci-pci-gli: enable UHS-II mode for GL9767

Victor Shih
2024-09-05T10:21:42Z

Changes are:
* Enable the internal clock when do reset on UHS-II mode.
* Increase timeout value before detecting UHS-II interface.
* Add vendor settings for UHS-II mode.
* Use the function sdhci_gli_wait_software_reset_done() for gl9767 reset.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
Signed-off-by: Lucas Lai <lucas.lai@genesyslogic.com.tw>
---

Updates in V20:
- Use the function sdhci_gli_wait_software_reset_done() for gl9767 reset.

Updates in V19:
- Use sdhci_gli_enable_internal_clock() to simplify the code
in the sdhci_gl9767_reset().
- Directly reading the SDHCI_PRESENT_STATE register to replace
the get_cd() avoids the possibility of the get_cd() sleeping
in the sdhci_gl9767_set_card_detect_debounce_time().
- Refine the position of gli_set_9767() in the sdhci_gl9767_reset().

Updates in V18:
- Add new register settings for gl9767.
- Add card_event in the sdhci_ops for gl9767.
- Add sdhci_gl9767_set_card_detect_debounce_time()
to configure the gl9767.
- Adjust the sdhci_gl9767_reset() process for gl9767.

Updates in V17:
- Use mmc_card_uhs2() to simplify the code in the sdhci_gl9767_reset().
- Use mmc_card_uhs2() to simplify the code in the
sdhci_gl9767_set_power().
- Add sdhci_gli_overcurrent_event_enable() to sdhci_gl9767_set_power().

Updates in V15:
- Add gl9767 to support uhs2 function.

---

drivers/mmc/host/sdhci-pci-gli.c | 203 ++++++++++++++++++++++++++++++-
1 file changed, 202 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 7cf27a666f34..dd4bd21a6019 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -174,6 +174,15 @@
#define PCI_GLI_9755_MISC 0x78
#define PCI_GLI_9755_MISC_SSC_OFF BIT(26)

+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL 0x508
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_CMD_CONFLICT_CHECK BIT(0)
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE GENMASK(21, 16)
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_IN_VALUE 0x05
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_OUT_VALUE 0x3F
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE GENMASK(23, 22)
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_1MS 0x2
+#define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_10MS 0x3
+
#define SDHCI_GLI_9767_GM_BURST_SIZE 0x510
#define SDHCI_GLI_9767_GM_BURST_SIZE_AXI_ALWAYS_SET BIT(8)

@@ -210,6 +219,13 @@
#define PCIE_GLI_9767_SCR_CORE_PWR_D3_OFF BIT(21)
#define PCIE_GLI_9767_SCR_CFG_RST_DATA_LINK_DOWN BIT(30)

+#define PCIE_GLI_9767_RESET_REG 0x8E4
+#define PCIE_GLI_9767_RESET_REG_SD_HOST_SW_RESET BIT(0)
+
+#define PCIE_GLI_9767_UHS2_PHY_SET_REG1 0x90C
+#define PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR GENMASK(31, 29)
+#define PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR_VALUE 0x3
+
#define PCIE_GLI_9767_SDHC_CAP 0x91C
#define PCIE_GLI_9767_SDHC_CAP_SDEI_RESULT BIT(5)

@@ -228,9 +244,15 @@
#define PCIE_GLI_9767_SD_EXPRESS_CTL_SD_EXPRESS_MODE BIT(1)

#define PCIE_GLI_9767_SD_DATA_MULTI_CTL 0x944
+#define PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 BIT(5)
+#define PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL BIT(8)
#define PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME GENMASK(23, 16)
#define PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME_VALUE 0x64

+#define PCIE_GLI_9767_UHS2_PHY_SET_REG2 0x948
+#define PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING GENMASK(22, 21)
+#define PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING_VALUE 0x0
+
#define PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2 0x950
#define PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2_SDEI_COMPLETE BIT(0)

@@ -240,6 +262,28 @@
#define PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2 0x958
#define PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2_SDEI_COMPLETE_SIGNAL_EN BIT(0)

+#define PCIE_GLI_9767_UHS2_CTL1 0x95C
+#define PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS BIT(5)
+#define PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS_VALUE 0x1
+#define PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL BIT(6)
+#define PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL_VALUE 0x1
+#define PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN GENMASK(10, 7)
+#define PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN_VALUE 0x3
+#define PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV GENMASK(14, 11)
+#define PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV_VALUE 0xf
+#define PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS GENMASK(16, 15)
+#define PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS_VALUE 0x0
+#define PCIE_GLI_9767_UHS2_CTL1_DIR_RECV GENMASK(18, 17)
+#define PCIE_GLI_9767_UHS2_CTL1_DIR_RECV_VALUE 0x0
+#define PCIE_GLI_9767_UHS2_CTL1_PDRST BIT(25)
+#define PCIE_GLI_9767_UHS2_CTL1_PDRST_VALUE 0x1
+
+#define PCIE_GLI_9767_UHS2_CTL2 0x964
+#define PCIE_GLI_9767_UHS2_CTL2_ZC GENMASK(3, 0)
+#define PCIE_GLI_9767_UHS2_CTL2_ZC_VALUE 0xb
+#define PCIE_GLI_9767_UHS2_CTL2_ZC_CTL BIT(6)
+#define PCIE_GLI_9767_UHS2_CTL2_ZC_CTL_VALUE 0x1
+
#define GLI_MAX_TUNING_LOOP 40

/* Genesys Logic chipset */
@@ -1156,6 +1200,31 @@ static void sdhci_gl9767_set_clock(struct sdhci_host *host, unsigned int clock)
gl9767_vhs_read(pdev);
}

+static void sdhci_gl9767_set_card_detect_debounce_time(struct sdhci_host *host)
+{
+ u32 value;
+
+ value = sdhci_readl(host, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
+ value &= ~(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE |
+ SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE);
+ if (sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)
+ value |= FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE,
+ SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_IN_VALUE) |
+ FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE,
+ SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_1MS);
+ else
+ value |= FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE,
+ SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_OUT_VALUE) |
+ FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE,
+ SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_10MS);
+ sdhci_writel(host, value, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
+}
+
+static void sdhci_gl9767_card_event(struct sdhci_host *host)
+{
+ sdhci_gl9767_set_card_detect_debounce_time(host);
+}
+
static void gli_set_9767(struct sdhci_host *host)
{
u32 value;
@@ -1163,6 +1232,12 @@ static void gli_set_9767(struct sdhci_host *host)
value = sdhci_readl(host, SDHCI_GLI_9767_GM_BURST_SIZE);
value &= ~SDHCI_GLI_9767_GM_BURST_SIZE_AXI_ALWAYS_SET;
sdhci_writel(host, value, SDHCI_GLI_9767_GM_BURST_SIZE);
+
+ value = sdhci_readl(host, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
+ value &= ~SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_CMD_CONFLICT_CHECK;
+ sdhci_writel(host, value, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
+
+ sdhci_gl9767_set_card_detect_debounce_time(host);
}

static void gl9767_hw_setting(struct sdhci_pci_slot *slot)
@@ -1201,7 +1276,44 @@ static void gl9767_hw_setting(struct sdhci_pci_slot *slot)

static void sdhci_gl9767_reset(struct sdhci_host *host, u8 mask)
{
- sdhci_reset(host, mask);
+ struct sdhci_pci_slot *slot = sdhci_priv(host);
+ struct pci_dev *pdev = slot->chip->pdev;
+ u32 value;
+
+ /* need internal clock */
+ if (mask & SDHCI_RESET_ALL) {
+ sdhci_gli_enable_internal_clock(host);
+
+ gl9767_vhs_write(pdev);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_RESET_REG, &value);
+ value &= ~PCIE_GLI_9767_RESET_REG_SD_HOST_SW_RESET;
+ pci_write_config_dword(pdev, PCIE_GLI_9767_RESET_REG, value);
+
+ if (read_poll_timeout_atomic(pci_read_config_dword, value,
+ !(value & PCIE_GLI_9767_RESET_REG_SD_HOST_SW_RESET),
+ 1, 5, true, pdev, PCIE_GLI_9767_RESET_REG, &value)) {
+ pr_warn("%s: %s: Reset SDHC AHB and TL-AMBA failure.\n",
+ __func__, mmc_hostname(host->mmc));
+ gl9767_vhs_read(pdev);
+ return;
+ }
+ gl9767_vhs_read(pdev);
+ }
+
+ if (mmc_card_uhs2(host->mmc)) {
+ if (mask & (SDHCI_RESET_CMD | SDHCI_RESET_DATA)) {
+ sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
+ sdhci_gli_uhs2_reset_sd_tran(host);
+ if (sdhci_gli_wait_software_reset_done(host, mask))
+ return;
+ } else {
+ sdhci_uhs2_reset(host, mask);
+ }
+ } else {
+ sdhci_reset(host, mask);
+ }
+
gli_set_9767(host);
}

@@ -1292,6 +1404,86 @@ static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
return 0;
}

+static void gl9767_vendor_init(struct sdhci_host *host)
+{
+ struct sdhci_pci_slot *slot = sdhci_priv(host);
+ struct pci_dev *pdev = slot->chip->pdev;
+ u32 value;
+
+ gl9767_vhs_write(pdev);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG1, &value);
+ value |= FIELD_PREP(PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR,
+ PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR_VALUE);
+ pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG1, value);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG2, &value);
+ value |= FIELD_PREP(PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING,
+ PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING_VALUE);
+ pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG2, value);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL1, &value);
+ value |= FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS,
+ PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL,
+ PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN,
+ PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV,
+ PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS,
+ PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DIR_RECV,
+ PCIE_GLI_9767_UHS2_CTL1_DIR_RECV_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_PDRST,
+ PCIE_GLI_9767_UHS2_CTL1_PDRST_VALUE);
+ pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL1, value);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, &value);
+ value |= FIELD_PREP(PCIE_GLI_9767_UHS2_CTL2_ZC,
+ PCIE_GLI_9767_UHS2_CTL2_ZC_VALUE) |
+ FIELD_PREP(PCIE_GLI_9767_UHS2_CTL2_ZC_CTL,
+ PCIE_GLI_9767_UHS2_CTL2_ZC_CTL_VALUE);
+ pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, value);
+
+ gl9767_vhs_read(pdev);
+}
+
+static void sdhci_gl9767_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd)
+{
+ struct sdhci_pci_slot *slot = sdhci_priv(host);
+ struct pci_dev *pdev = slot->chip->pdev;
+ u32 value;
+
+ if (mmc_card_uhs2(host->mmc)) {
+ gl9767_vhs_write(pdev);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
+ value |= PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 |
+ PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL;
+ pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
+
+ gl9767_vhs_read(pdev);
+
+ sdhci_gli_overcurrent_event_enable(host, false);
+ sdhci_uhs2_set_power(host, mode, vdd);
+ sdhci_gli_overcurrent_event_enable(host, true);
+ } else {
+ gl9767_vhs_write(pdev);
+
+ pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
+ value &= ~(PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 |
+ PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL);
+ pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
+
+ gl9767_vhs_read(pdev);
+
+ sdhci_gli_overcurrent_event_enable(host, false);
+ sdhci_set_power(host, mode, vdd);
+ sdhci_gli_overcurrent_event_enable(host, true);
+ }
+}
+
static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot)
{
struct sdhci_host *host = slot->host;
@@ -1328,6 +1520,7 @@ static int gli_probe_slot_gl9767(struct sdhci_pci_slot *slot)
host->mmc->caps2 |= MMC_CAP2_SD_EXP;
host->mmc_host_ops.init_sd_express = gl9767_init_sd_express;
sdhci_enable_v4_mode(host);
+ gl9767_vendor_init(host);

return 0;
}
@@ -1831,12 +2024,20 @@ static const struct sdhci_ops sdhci_gl9767_ops = {
.reset = sdhci_gl9767_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.voltage_switch = sdhci_gl9767_voltage_switch,
+ .dump_uhs2_regs = sdhci_uhs2_dump_regs,
+ .set_timeout = sdhci_uhs2_set_timeout,
+ .irq = sdhci_uhs2_irq,
+ .set_power = sdhci_gl9767_set_power,
+ .uhs2_pre_detect_init = sdhci_gli_pre_detect_init,
+ .card_event = sdhci_gl9767_card_event,
};

const struct sdhci_pci_fixes sdhci_gl9767 = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_BROKEN_DDR50,
.probe_slot = gli_probe_slot_gl9767,
+ .add_host = sdhci_pci_uhs2_add_host,
+ .remove_host = sdhci_pci_uhs2_remove_host,
.ops = &sdhci_gl9767_ops,
#ifdef CONFIG_PM_SLEEP
.resume = sdhci_pci_gli_resume,
--
2.25.1