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[2001:b400:e25c:983f:c7ff:3efd:77d9:6c16]) by smtp.gmail.com with ESMTPSA id f19-20020a170902e99300b0019acd3151d0sm1287665plb.114.2023.03.31.03.57.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 Mar 2023 03:57:06 -0700 (PDT) From: Victor Shih X-Google-Original-From: Victor Shih To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org, dlunev@chromium.org, Victor Shih , Ben Chuang Subject: [PATCH V7 23/23] mmc: sdhci-pci-gli: enable UHS-II mode for GL9755 Date: Fri, 31 Mar 2023 18:55:46 +0800 Message-Id: <20230331105546.13607-24-victor.shih@genesyslogic.com.tw> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230331105546.13607-1-victor.shih@genesyslogic.com.tw> References: <20230331105546.13607-1-victor.shih@genesyslogic.com.tw> MIME-Version: 1.0 X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1761881406897492142?= X-GMAIL-MSGID: =?utf-8?q?1761881406897492142?= Changes are: * Disable GL9755 overcurrent interrupt when power on/off on UHS-II. * Enable the internal clock when do reset on UHS-II mode. * Increase timeout value before detecting UHS-II interface. * Add vendor settings fro UHS-II mode. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- drivers/mmc/host/Kconfig | 1 + drivers/mmc/host/sdhci-pci-gli.c | 276 ++++++++++++++++++++++++++++++- 2 files changed, 276 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 06ab111eba3b..b89804d2da16 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -111,6 +111,7 @@ config MMC_SDHCI_PCI tristate "SDHCI support on PCI bus" depends on MMC_SDHCI && PCI select MMC_CQHCI + select MMC_SDHCI_UHS2 select IOSF_MBI if X86 select MMC_SDHCI_IO_ACCESSORS help diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index 633a8ee8f8c5..eedf6cd5c94a 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -18,6 +18,7 @@ #include "sdhci-cqhci.h" #include "sdhci-pci.h" #include "cqhci.h" +#include "sdhci-uhs2.h" /* Genesys Logic extra registers */ #define SDHCI_GLI_9750_WT 0x800 @@ -139,9 +140,36 @@ #define PCI_GLI_9755_PLLSSC 0x68 #define PCI_GLI_9755_PLLSSC_PPM GENMASK(15, 0) +#define PCI_GLI_9755_PLLSSC_RTL BIT(24) +#define GLI_9755_PLLSSC_RTL_VALUE 0x1 +#define PCI_GLI_9755_PLLSSC_TRANS_PASS BIT(27) +#define GLI_9755_PLLSSC_TRANS_PASS_VALUE 0x1 +#define PCI_GLI_9755_PLLSSC_RECV GENMASK(29, 28) +#define GLI_9755_PLLSSC_RECV_VALUE 0x3 +#define PCI_GLI_9755_PLLSSC_TRAN GENMASK(31, 30) +#define GLI_9755_PLLSSC_TRAN_VALUE 0x3 + +#define PCI_GLI_9755_UHS2_PLL 0x6C +#define PCI_GLI_9755_UHS2_PLL_SSC GENMASK(9, 8) +#define GLI_9755_UHS2_PLL_SSC_VALUE 0x0 +#define PCI_GLI_9755_UHS2_PLL_DELAY BIT(18) +#define GLI_9755_UHS2_PLL_DELAY_VALUE 0x1 +#define PCI_GLI_9755_UHS2_PLL_PDRST BIT(27) +#define GLI_9755_UHS2_PLL_PDRST_VALUE 0x1 #define PCI_GLI_9755_SerDes 0x70 +#define PCI_GLI_9755_UHS2_SERDES_INTR GENMASK(2, 0) +#define GLI_9755_UHS2_SERDES_INTR_VALUE 0x3 +#define PCI_GLI_9755_UHS2_SERDES_ZC1 BIT(3) +#define GLI_9755_UHS2_SERDES_ZC1_VALUE 0x0 +#define PCI_GLI_9755_UHS2_SERDES_ZC2 GENMASK(7, 4) +#define GLI_9755_UHS2_SERDES_ZC2_DEFAULT 0xB +#define GLI_9755_UHS2_SERDES_ZC2_SANDISK 0x0 #define PCI_GLI_9755_SCP_DIS BIT(19) +#define PCI_GLI_9755_UHS2_SERDES_TRAN GENMASK(27, 24) +#define GLI_9755_UHS2_SERDES_TRAN_VALUE 0xC +#define PCI_GLI_9755_UHS2_SERDES_RECV GENMASK(31, 28) +#define GLI_9755_UHS2_SERDES_RECV_VALUE 0xF #define PCI_GLI_9755_MISC 0x78 #define PCI_GLI_9755_MISC_SSC_OFF BIT(26) @@ -693,6 +721,244 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot) gl9755_wt_off(pdev); } +static void gl9755_vendor_init(struct sdhci_host *host) +{ + struct sdhci_pci_slot *slot = sdhci_priv(host); + struct pci_dev *pdev = slot->chip->pdev; + u32 serdes; + u32 pllssc; + u32 uhs2_pll; + + gl9755_wt_on(pdev); + + pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &serdes); + serdes &= ~PCI_GLI_9755_UHS2_SERDES_TRAN; + serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_TRAN, + GLI_9755_UHS2_SERDES_TRAN_VALUE); + serdes &= ~PCI_GLI_9755_UHS2_SERDES_RECV; + serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_RECV, + GLI_9755_UHS2_SERDES_RECV_VALUE); + serdes &= ~PCI_GLI_9755_UHS2_SERDES_INTR; + serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_INTR, + GLI_9755_UHS2_SERDES_INTR_VALUE); + serdes &= ~PCI_GLI_9755_UHS2_SERDES_ZC1; + serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_ZC1, + GLI_9755_UHS2_SERDES_ZC1_VALUE); + serdes &= ~PCI_GLI_9755_UHS2_SERDES_ZC2; + serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_ZC2, + GLI_9755_UHS2_SERDES_ZC2_DEFAULT); + pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, serdes); + + pci_read_config_dword(pdev, PCI_GLI_9755_UHS2_PLL, &uhs2_pll); + uhs2_pll &= ~PCI_GLI_9755_UHS2_PLL_SSC; + uhs2_pll |= FIELD_PREP(PCI_GLI_9755_UHS2_PLL_SSC, + GLI_9755_UHS2_PLL_SSC_VALUE); + uhs2_pll &= ~PCI_GLI_9755_UHS2_PLL_DELAY; + uhs2_pll |= FIELD_PREP(PCI_GLI_9755_UHS2_PLL_DELAY, + GLI_9755_UHS2_PLL_DELAY_VALUE); + uhs2_pll &= ~PCI_GLI_9755_UHS2_PLL_PDRST; + uhs2_pll |= FIELD_PREP(PCI_GLI_9755_UHS2_PLL_PDRST, + GLI_9755_UHS2_PLL_PDRST_VALUE); + pci_write_config_dword(pdev, PCI_GLI_9755_UHS2_PLL, uhs2_pll); + + pci_read_config_dword(pdev, PCI_GLI_9755_PLLSSC, &pllssc); + pllssc &= ~PCI_GLI_9755_PLLSSC_RTL; + pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_RTL, + GLI_9755_PLLSSC_RTL_VALUE); + pllssc &= ~PCI_GLI_9755_PLLSSC_TRANS_PASS; + pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_TRANS_PASS, + GLI_9755_PLLSSC_TRANS_PASS_VALUE); + pllssc &= ~PCI_GLI_9755_PLLSSC_RECV; + pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_RECV, + GLI_9755_PLLSSC_RECV_VALUE); + pllssc &= ~PCI_GLI_9755_PLLSSC_TRAN; + pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_TRAN, + GLI_9755_PLLSSC_TRAN_VALUE); + pci_write_config_dword(pdev, PCI_GLI_9755_PLLSSC, pllssc); + + gl9755_wt_off(pdev); +} + +static void gl9755_pre_detect_init(struct sdhci_host *host) +{ + /* GL9755 need more time on UHS2 detect flow */ + sdhci_writeb(host, 0xA7, SDHCI_UHS2_TIMER_CTRL); +} + +static void gl9755_overcurrent_event_enable(struct sdhci_host *host, + bool enable) +{ + u32 mask; + + mask = sdhci_readl(host, SDHCI_SIGNAL_ENABLE); + if (enable) + mask |= SDHCI_INT_BUS_POWER; + else + mask &= ~SDHCI_INT_BUS_POWER; + + sdhci_writel(host, mask, SDHCI_SIGNAL_ENABLE); + + mask = sdhci_readl(host, SDHCI_INT_ENABLE); + if (enable) + mask |= SDHCI_INT_BUS_POWER; + else + mask &= ~SDHCI_INT_BUS_POWER; + + sdhci_writel(host, mask, SDHCI_INT_ENABLE); +} + +static void gl9755_set_power(struct sdhci_host *host, unsigned char mode, + unsigned short vdd) +{ + u8 pwr = 0; + + if (mode != MMC_POWER_OFF) { + switch (1 << vdd) { + case MMC_VDD_165_195: + /* + * Without a regulator, SDHCI does not support 2.0v + * so we only get here if the driver deliberately + * added the 2.0v range to ocr_avail. Map it to 1.8v + * for the purpose of turning on the power. + */ + case MMC_VDD_20_21: + pwr = SDHCI_POWER_180; + break; + case MMC_VDD_29_30: + case MMC_VDD_30_31: + pwr = SDHCI_POWER_300; + break; + case MMC_VDD_32_33: + case MMC_VDD_33_34: + pwr = SDHCI_POWER_330; + break; + default: + WARN(1, "%s: Invalid vdd %#x\n", + mmc_hostname(host->mmc), vdd); + break; + } + + pwr |= SDHCI_VDD2_POWER_180; + } + + if (host->pwr == pwr) + return; + + host->pwr = pwr; + + if (pwr == 0) { + gl9755_overcurrent_event_enable(host, false); + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + } else { + gl9755_overcurrent_event_enable(host, false); + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + + pwr |= (SDHCI_POWER_ON | SDHCI_VDD2_POWER_ON); + + sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL); + /* wait stable */ + mdelay(5); + sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); + /* wait stable */ + mdelay(5); + gl9755_overcurrent_event_enable(host, true); + } +} + +static bool sdhci_wait_clock_stable(struct sdhci_host *host) +{ + u16 clk = 0; + ktime_t timeout; + + /* Wait max 20 ms */ + timeout = ktime_add_ms(ktime_get(), 20); + while (1) { + bool timedout = ktime_after(ktime_get(), timeout); + + clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + if (clk & SDHCI_CLOCK_INT_STABLE) + break; + if (timedout) { + pr_err("%s: Internal clock never stabilised.\n", + mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return false; + } + udelay(10); + } + return true; +} + +static void gl9755_uhs2_reset_sd_tran(struct sdhci_host *host) +{ + /* do this on UHS2 mode */ + if (host->mmc->flags & MMC_UHS2_SD_TRAN) { + sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_SD); + sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); + sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); + sdhci_uhs2_clear_set_irqs(host, + SDHCI_INT_ALL_MASK, + SDHCI_UHS2_INT_ERROR_MASK); + } +} + +static void sdhci_gl9755_reset(struct sdhci_host *host, u8 mask) +{ + ktime_t timeout; + u16 ctrl2; + u16 clk_ctrl; + + /* need internal clock */ + if (mask & SDHCI_RESET_ALL) { + ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); + clk_ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + + if ((ctrl2 & SDHCI_CTRL_V4_MODE) && + (ctrl2 & SDHCI_CTRL_UHS2_ENABLE)) { + sdhci_writew(host, + SDHCI_CLOCK_INT_EN, + SDHCI_CLOCK_CONTROL); + } else { + sdhci_writew(host, + SDHCI_CLOCK_INT_EN, + SDHCI_CLOCK_CONTROL); + sdhci_wait_clock_stable(host); + sdhci_writew(host, + SDHCI_CTRL_V4_MODE, + SDHCI_HOST_CONTROL2); + } + } + + sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); + + /* reset sd-tran on UHS2 mode if need to reset cmd/data */ + if ((mask & SDHCI_RESET_CMD) | (mask & SDHCI_RESET_DATA)) + gl9755_uhs2_reset_sd_tran(host); + + if (mask & SDHCI_RESET_ALL) + host->clock = 0; + + /* Wait max 100 ms */ + timeout = ktime_add_ms(ktime_get(), 100); + + /* hw clears the bit when it's done */ + while (1) { + bool timedout = ktime_after(ktime_get(), timeout); + + if (!(sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask)) + break; + if (timedout) { + 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; + } + udelay(10); + } +} + static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot) { struct sdhci_host *host = slot->host; @@ -713,6 +979,7 @@ static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot) gli_pcie_enable_msi(slot); slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO; sdhci_enable_v4_mode(host); + gl9755_vendor_init(host); return 0; } @@ -1085,17 +1352,24 @@ static const struct sdhci_ops sdhci_gl9755_ops = { .read_w = sdhci_gli_readw, .read_b = sdhci_gli_readb, .set_clock = sdhci_gl9755_set_clock, + .set_power = gl9755_set_power, .enable_dma = sdhci_pci_enable_dma, .set_bus_width = sdhci_set_bus_width, - .reset = sdhci_reset, + .reset = sdhci_gl9755_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, .voltage_switch = sdhci_gli_voltage_switch, + .dump_uhs2_regs = sdhci_uhs2_dump_regs, + .set_timeout = sdhci_uhs2_set_timeout, + .irq = sdhci_uhs2_irq, + .uhs2_pre_detect_init = gl9755_pre_detect_init, }; const struct sdhci_pci_fixes sdhci_gl9755 = { .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, .quirks2 = SDHCI_QUIRK2_BROKEN_DDR50, .probe_slot = gli_probe_slot_gl9755, + .add_host = sdhci_pci_uhs2_add_host, + .remove_host = sdhci_pci_uhs2_remove_host, .ops = &sdhci_gl9755_ops, #ifdef CONFIG_PM_SLEEP .resume = sdhci_pci_gli_resume,