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Signed-off-by: Sai Krishna Potthuri Acked-by: Krzysztof Kozlowski --- Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml index 8296c34cfa00..9166ac061b44 100644 --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml @@ -27,6 +27,7 @@ allOf: enum: - xlnx,zynqmp-8.9a - xlnx,versal-8.9a + - xlnx,versal-net-emmc then: properties: clock-output-names: @@ -62,6 +63,10 @@ properties: description: For this device it is strongly suggested to include clock-output-names and '#clock-cells'. + - const: xlnx,versal-net-emmc # Versal Net eMMC PHY + description: + For this device it is strongly suggested to include + clock-output-names and '#clock-cells'. - items: - const: intel,lgm-sdhci-5.1-emmc # Intel LGM eMMC PHY - const: arasan,sdhci-5.1 From patchwork Mon Apr 3 10:25:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sai Krishna Potthuri X-Patchwork-Id: 78489 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp2207100vqo; Mon, 3 Apr 2023 03:53:13 -0700 (PDT) X-Google-Smtp-Source: AKy350bBt8sSGpCyslgbJww+t55v1Ha7y6ANY/gYqNaSurXlHgAOj8VawgLX/fGPa9IXgEZJU18U X-Received: by 2002:a17:902:ce8e:b0:19e:2fb0:a5d9 with SMTP id f14-20020a170902ce8e00b0019e2fb0a5d9mr20919569plg.32.1680519193640; Mon, 03 Apr 2023 03:53:13 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1680519193; cv=pass; d=google.com; s=arc-20160816; b=TYjEPnvL/UOJGpcncbbDhVueosErdheA8xDhay/PqjGzyU+Bpfeq34VuOyYqvtU273 2+Hmc6h89tC2retK5ojHuFmYRQoryK4Hc3BxeFjRFE5m6ZMtd9+ydTAfh5fIlfqR8T+H do166gr/Z9QngFyy88OwmFLD3NIW0Iw5o4wxTJzlrpD7h1v2KYF0DD5+oUMbG7Jf2aaW S5X/T8tentB15GBLq6uymeu3wo7C45hLejnC7RFlfsxUN8m1JwDmf34IOfdjhGnyu7US rHqTwED2n8zQGu2quf6i/SgwSoa/vb8DIGviZISGMejMs76wYE6WvS0VSxovYlt/9VE2 vzIg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=ePH8Ow77QkgUhH3KfzH7rq4c3CqPs+SUn7rbTczDJGc=; b=YGiPpuhsyoWt6dlhbgGnDLtPo3rQIfxxGp2OOJMGdEMUcrtdH1QU4+x2ozH7pLHFf5 KBTyf4SqXKReZBMDnqTY3Zph+EqWwm8ybxpYuKOZOlHMPmWLYbOHmyWPykNklMmWXv32 AC+XF2ylKiONBQ1HhFLYXLtYQ7E1/eFGmmd92CIv+Zgkm+r941kzpxdgUYJxAcBjqmlG Ft1m2lNjrpObmebJ4pqTfH+4vHDi9hUuTSbyzXmGhihoj6N3L9NsT+H6xnRFDH+rQbxp /VhB8cmOZ7grLq7XRjMWLn78+ryEIZ5pcKefWJaFkRpua7lD99iIbgulaBmnsMKws491 6ZUQ== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=HrBvaoUH; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (out1.vger.email. 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2023 10:26:17.8353 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fd9dcf10-a0f3-4b22-c934-08db342ddc64 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT007.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6436 X-Spam-Status: No, score=0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no 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?1762152094077803990?= X-GMAIL-MSGID: =?utf-8?q?1762152094077803990?= From: Swati Agarwal Add support for eMMC5.1 on Xilinx Versal Net platform - Add new compatible string(xlnx,versal-net-emmc). - Add support for PHY which is part of Host Controller register space. - Add DLL and Delay Chain mode support and corresponding tap delays for all eMMC modes. - Add Strobe select tap for HS400 mode. Signed-off-by: Swati Agarwal Co-developed-by: Sai Krishna Potthuri Signed-off-by: Sai Krishna Potthuri Acked-by: Adrian Hunter --- drivers/mmc/host/sdhci-of-arasan.c | 235 +++++++++++++++++++++++++++++ 1 file changed, 235 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index deb67daf179f..c3fecb8ba66e 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -41,11 +41,41 @@ #define VENDOR_ENHANCED_STROBE BIT(0) #define PHY_CLK_TOO_SLOW_HZ 400000 +#define MIN_PHY_CLK_HZ 50000000 #define SDHCI_ITAPDLY_CHGWIN 0x200 #define SDHCI_ITAPDLY_ENABLE 0x100 #define SDHCI_OTAPDLY_ENABLE 0x40 +#define PHY_CTRL_REG1 0x270 +#define PHY_CTRL_ITAPDLY_ENA_MASK BIT(0) +#define PHY_CTRL_ITAPDLY_SEL_MASK GENMASK(5, 1) +#define PHY_CTRL_ITAPDLY_SEL_SHIFT 1 +#define PHY_CTRL_ITAP_CHG_WIN_MASK BIT(6) +#define PHY_CTRL_OTAPDLY_ENA_MASK BIT(8) +#define PHY_CTRL_OTAPDLY_SEL_MASK GENMASK(15, 12) +#define PHY_CTRL_OTAPDLY_SEL_SHIFT 12 +#define PHY_CTRL_STRB_SEL_MASK GENMASK(23, 16) +#define PHY_CTRL_STRB_SEL_SHIFT 16 +#define PHY_CTRL_TEST_CTRL_MASK GENMASK(31, 24) + +#define PHY_CTRL_REG2 0x274 +#define PHY_CTRL_EN_DLL_MASK BIT(0) +#define PHY_CTRL_DLL_RDY_MASK BIT(1) +#define PHY_CTRL_FREQ_SEL_MASK GENMASK(6, 4) +#define PHY_CTRL_FREQ_SEL_SHIFT 4 +#define PHY_CTRL_SEL_DLY_TX_MASK BIT(16) +#define PHY_CTRL_SEL_DLY_RX_MASK BIT(17) +#define FREQSEL_200M_170M 0x0 +#define FREQSEL_170M_140M 0x1 +#define FREQSEL_140M_110M 0x2 +#define FREQSEL_110M_80M 0x3 +#define FREQSEL_80M_50M 0x4 +#define FREQSEL_275M_250M 0x5 +#define FREQSEL_250M_225M 0x6 +#define FREQSEL_225M_200M 0x7 +#define PHY_DLL_TIMEOUT_MS 100 + /* Default settings for ZynqMP Clock Phases */ #define ZYNQMP_ICLK_PHASE {0, 63, 63, 0, 63, 0, 0, 183, 54, 0, 0} #define ZYNQMP_OCLK_PHASE {0, 72, 60, 0, 60, 72, 135, 48, 72, 135, 0} @@ -53,6 +83,11 @@ #define VERSAL_ICLK_PHASE {0, 132, 132, 0, 132, 0, 0, 162, 90, 0, 0} #define VERSAL_OCLK_PHASE {0, 60, 48, 0, 48, 72, 90, 36, 60, 90, 0} +#define VERSAL_NET_EMMC_ICLK_PHASE {0, 0, 0, 0, 0, 0, 0, 0, 39, 0, 0} +#define VERSAL_NET_EMMC_OCLK_PHASE {0, 113, 0, 0, 0, 0, 0, 0, 113, 79, 45} + +#define VERSAL_NET_PHY_CTRL_STRB90_STRB180_VAL 0X77 + /* * On some SoCs the syscon area has a feature where the upper 16-bits of * each 32-bit register act as a write mask for the lower 16-bits. This allows @@ -135,6 +170,7 @@ struct sdhci_arasan_clk_data { * @clk_ahb: Pointer to the AHB clock * @phy: Pointer to the generic phy * @is_phy_on: True if the PHY is on; false if not. + * @internal_phy_reg: True if the PHY is within the Host controller. * @has_cqe: True if controller has command queuing engine. * @clk_data: Struct for the Arasan Controller Clock Data. * @clk_ops: Struct for the Arasan Controller Clock Operations. @@ -147,6 +183,7 @@ struct sdhci_arasan_data { struct clk *clk_ahb; struct phy *phy; bool is_phy_on; + bool internal_phy_reg; bool has_cqe; struct sdhci_arasan_clk_data clk_data; @@ -207,6 +244,61 @@ static const struct sdhci_arasan_soc_ctl_map intel_keembay_soc_ctl_map = { .hiword_update = false, }; +static void sdhci_arasan_phy_set_delaychain(struct sdhci_host *host, bool enable) +{ + u32 reg; + + reg = readl(host->ioaddr + PHY_CTRL_REG2); + if (enable) + reg |= (PHY_CTRL_SEL_DLY_TX_MASK | PHY_CTRL_SEL_DLY_RX_MASK); + else + reg &= ~(PHY_CTRL_SEL_DLY_TX_MASK | PHY_CTRL_SEL_DLY_RX_MASK); + + writel(reg, host->ioaddr + PHY_CTRL_REG2); +} + +static int sdhci_arasan_phy_set_dll(struct sdhci_host *host, bool enable) +{ + u32 reg; + + reg = readl(host->ioaddr + PHY_CTRL_REG2); + if (enable) + reg |= PHY_CTRL_EN_DLL_MASK; + else + reg &= ~PHY_CTRL_EN_DLL_MASK; + + writel(reg, host->ioaddr + PHY_CTRL_REG2); + + if (!enable) + return 0; + + return readl_relaxed_poll_timeout(host->ioaddr + PHY_CTRL_REG2, reg, + (reg & PHY_CTRL_DLL_RDY_MASK), 10, + 1000 * PHY_DLL_TIMEOUT_MS); +} + +static void sdhci_arasan_phy_dll_set_freq(struct sdhci_host *host, int clock) +{ + u32 reg, freq_sel, freq; + + freq = DIV_ROUND_CLOSEST(clock, 1000000); + if (freq <= 200 && freq > 170) + freq_sel = FREQSEL_200M_170M; + else if (freq <= 170 && freq > 140) + freq_sel = FREQSEL_170M_140M; + else if (freq <= 140 && freq > 110) + freq_sel = FREQSEL_140M_110M; + else if (freq <= 110 && freq > 80) + freq_sel = FREQSEL_110M_80M; + else + freq_sel = FREQSEL_80M_50M; + + reg = readl(host->ioaddr + PHY_CTRL_REG2); + reg &= ~PHY_CTRL_FREQ_SEL_MASK; + reg |= (freq_sel << PHY_CTRL_FREQ_SEL_SHIFT); + writel(reg, host->ioaddr + PHY_CTRL_REG2); +} + /** * sdhci_arasan_syscon_write - Write to a field in soc_ctl registers * @@ -324,8 +416,21 @@ static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock) if (clk_data->set_clk_delays) clk_data->set_clk_delays(host); + if (sdhci_arasan->internal_phy_reg && clock >= MIN_PHY_CLK_HZ) { + sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); + sdhci_arasan_phy_set_dll(host, 0); + sdhci_arasan_phy_set_delaychain(host, 0); + sdhci_arasan_phy_dll_set_freq(host, clock); + } else if (sdhci_arasan->internal_phy_reg) { + sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); + sdhci_arasan_phy_set_delaychain(host, 1); + } + sdhci_set_clock(host, clock); + if (sdhci_arasan->internal_phy_reg && clock >= MIN_PHY_CLK_HZ) + sdhci_arasan_phy_set_dll(host, 1); + if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE) /* * Some controllers immediately report SDHCI_CLOCK_INT_STABLE @@ -897,6 +1002,101 @@ static const struct clk_ops versal_sampleclk_ops = { .set_phase = sdhci_versal_sampleclk_set_phase, }; +static int sdhci_versal_net_emmc_sdcardclk_set_phase(struct clk_hw *hw, int degrees) +{ + struct sdhci_arasan_clk_data *clk_data = + container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw); + struct sdhci_arasan_data *sdhci_arasan = + container_of(clk_data, struct sdhci_arasan_data, clk_data); + struct sdhci_host *host = sdhci_arasan->host; + u8 tap_delay, tap_max = 0; + + switch (host->timing) { + case MMC_TIMING_MMC_HS: + case MMC_TIMING_MMC_DDR52: + tap_max = 16; + break; + case MMC_TIMING_MMC_HS200: + case MMC_TIMING_MMC_HS400: + /* For 200MHz clock, 32 Taps are available */ + tap_max = 32; + break; + default: + break; + } + + tap_delay = (degrees * tap_max) / 360; + + /* Set the Clock Phase */ + if (tap_delay) { + u32 regval; + + regval = sdhci_readl(host, PHY_CTRL_REG1); + regval |= PHY_CTRL_OTAPDLY_ENA_MASK; + sdhci_writel(host, regval, PHY_CTRL_REG1); + regval &= ~PHY_CTRL_OTAPDLY_SEL_MASK; + regval |= tap_delay << PHY_CTRL_OTAPDLY_SEL_SHIFT; + sdhci_writel(host, regval, PHY_CTRL_REG1); + } + + return 0; +} + +static const struct clk_ops versal_net_sdcardclk_ops = { + .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate, + .set_phase = sdhci_versal_net_emmc_sdcardclk_set_phase, +}; + +static int sdhci_versal_net_emmc_sampleclk_set_phase(struct clk_hw *hw, int degrees) +{ + struct sdhci_arasan_clk_data *clk_data = + container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw); + struct sdhci_arasan_data *sdhci_arasan = + container_of(clk_data, struct sdhci_arasan_data, clk_data); + struct sdhci_host *host = sdhci_arasan->host; + u8 tap_delay, tap_max = 0; + u32 regval; + + switch (host->timing) { + case MMC_TIMING_MMC_HS: + case MMC_TIMING_MMC_DDR52: + tap_max = 32; + break; + case MMC_TIMING_MMC_HS400: + /* Strobe select tap point for strb90 and strb180 */ + regval = sdhci_readl(host, PHY_CTRL_REG1); + regval &= ~PHY_CTRL_STRB_SEL_MASK; + regval |= VERSAL_NET_PHY_CTRL_STRB90_STRB180_VAL << PHY_CTRL_STRB_SEL_SHIFT; + sdhci_writel(host, regval, PHY_CTRL_REG1); + break; + default: + break; + } + + tap_delay = (degrees * tap_max) / 360; + + /* Set the Clock Phase */ + if (tap_delay) { + regval = sdhci_readl(host, PHY_CTRL_REG1); + regval |= PHY_CTRL_ITAP_CHG_WIN_MASK; + sdhci_writel(host, regval, PHY_CTRL_REG1); + regval |= PHY_CTRL_ITAPDLY_ENA_MASK; + sdhci_writel(host, regval, PHY_CTRL_REG1); + regval &= ~PHY_CTRL_ITAPDLY_SEL_MASK; + regval |= tap_delay << PHY_CTRL_ITAPDLY_SEL_SHIFT; + sdhci_writel(host, regval, PHY_CTRL_REG1); + regval &= ~PHY_CTRL_ITAP_CHG_WIN_MASK; + sdhci_writel(host, regval, PHY_CTRL_REG1); + } + + return 0; +} + +static const struct clk_ops versal_net_sampleclk_ops = { + .recalc_rate = sdhci_arasan_sampleclk_recalc_rate, + .set_phase = sdhci_versal_net_emmc_sampleclk_set_phase, +}; + static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u32 deviceid) { u16 clk; @@ -1107,7 +1307,17 @@ static void arasan_dt_parse_clk_phases(struct device *dev, clk_data->clk_phase_out[i] = versal_oclk_phase[i]; } } + if (of_device_is_compatible(dev->of_node, "xlnx,versal-net-emmc")) { + u32 versal_net_iclk_phase[MMC_TIMING_MMC_HS400 + 1] = + VERSAL_NET_EMMC_ICLK_PHASE; + u32 versal_net_oclk_phase[MMC_TIMING_MMC_HS400 + 1] = + VERSAL_NET_EMMC_OCLK_PHASE; + for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) { + clk_data->clk_phase_in[i] = versal_net_iclk_phase[i]; + clk_data->clk_phase_out[i] = versal_net_oclk_phase[i]; + } + } arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_LEGACY, "clk-phase-legacy"); arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS, @@ -1225,6 +1435,14 @@ static const struct sdhci_pltfm_data sdhci_arasan_zynqmp_pdata = { SDHCI_QUIRK2_STOP_WITH_TC, }; +static const struct sdhci_pltfm_data sdhci_arasan_versal_net_pdata = { + .ops = &sdhci_arasan_ops, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | + SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN | + SDHCI_QUIRK2_STOP_WITH_TC | + SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400, +}; + static const struct sdhci_arasan_clk_ops zynqmp_clk_ops = { .sdcardclk_ops = &zynqmp_sdcardclk_ops, .sampleclk_ops = &zynqmp_sampleclk_ops, @@ -1245,6 +1463,16 @@ static struct sdhci_arasan_of_data sdhci_arasan_versal_data = { .clk_ops = &versal_clk_ops, }; +static const struct sdhci_arasan_clk_ops versal_net_clk_ops = { + .sdcardclk_ops = &versal_net_sdcardclk_ops, + .sampleclk_ops = &versal_net_sampleclk_ops, +}; + +static struct sdhci_arasan_of_data sdhci_arasan_versal_net_data = { + .pdata = &sdhci_arasan_versal_net_pdata, + .clk_ops = &versal_net_clk_ops, +}; + static struct sdhci_arasan_of_data intel_keembay_emmc_data = { .soc_ctl_map = &intel_keembay_soc_ctl_map, .pdata = &sdhci_keembay_emmc_pdata, @@ -1314,6 +1542,10 @@ static const struct of_device_id sdhci_arasan_of_match[] = { .compatible = "xlnx,versal-8.9a", .data = &sdhci_arasan_versal_data, }, + { + .compatible = "xlnx,versal-net-emmc", + .data = &sdhci_arasan_versal_net_data, + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sdhci_arasan_of_match); @@ -1788,6 +2020,9 @@ static int sdhci_arasan_probe(struct platform_device *pdev) host->mmc->caps2 |= MMC_CAP2_CQE_DCMD; } + if (of_device_is_compatible(np, "xlnx,versal-net-emmc")) + sdhci_arasan->internal_phy_reg = true; + ret = sdhci_arasan_add_host(sdhci_arasan); 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Signed-off-by: Sai Krishna Potthuri Acked-by: Adrian Hunter --- drivers/mmc/host/sdhci-of-arasan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index c3fecb8ba66e..d9a29c346745 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -413,7 +413,7 @@ static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock) } /* Set the Input and Output Clock Phase Delays */ - if (clk_data->set_clk_delays) + if (clk_data->set_clk_delays && clock > PHY_CLK_TOO_SLOW_HZ) clk_data->set_clk_delays(host); if (sdhci_arasan->internal_phy_reg && clock >= MIN_PHY_CLK_HZ) {