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Message-ID: <095aa301-aba8-465b-9306-11096ea804b9@intel.com>
Date: Mon, 2 Sep 2024 21:39:49 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Victor Shih <victorshihgli@...il.com>, ulf.hansson@...aro.org
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
benchuanggli@...il.com, Lucas.Lai@...esyslogic.com.tw,
HL.Liu@...esyslogic.com.tw, Greg.tu@...esyslogic.com.tw,
dlunev@...omium.org, Ben Chuang <ben.chuang@...esyslogic.com.tw>,
Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V19 22/22] mmc: sdhci-pci-gli: enable UHS-II mode for
GL9767
On 29/08/24 13:15, Victor Shih wrote:
> From: Victor Shih <victor.shih@...esyslogic.com.tw>
>
> 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.
>
> Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
> Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
> Signed-off-by: Lucas Lai <lucas.lai@...esyslogic.com.tw>
> ---
>
> 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 | 211 ++++++++++++++++++++++++++++++-
> 1 file changed, 210 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index e826e02a0d52..2375a810c2b8 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 */
> @@ -1150,6 +1194,31 @@ 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;
> @@ -1157,6 +1226,12 @@ 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)
> @@ -1195,7 +1270,52 @@ 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;
> + u8 rst;
> +
> + /* 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 (read_poll_timeout_atomic(sdhci_readb, rst, !(rst & mask), 10, 100000,
> + false, host, SDHCI_SOFTWARE_RESET)) {
> + pr_err("%s: Reset 0x%x never completed.\n",
> + mmc_hostname(host->mmc), (int)mask);
> + sdhci_dumpregs(host);
> + /* manual clear */
> + sdhci_writeb(host, 0, SDHCI_SOFTWARE_RESET);
> + return;
> + }
Same code in sdhci_gl9755_reset(). Might as well make it a separate
function so it can be shared.
> + } else {
> + sdhci_uhs2_reset(host, mask);
> + }
> + } else {
> + sdhci_reset(host, mask);
> + }
> +
> gli_set_9767(host);
> }
>
> @@ -1286,6 +1406,86 @@ 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;
> @@ -1322,6 +1522,7 @@ 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;
> }
> @@ -1825,12 +2026,20 @@ 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,
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