From: Sebastian Reichel <sebastian.reichel@collabora.com>
To: Heiko Stuebner <heiko@sntech.de>
Cc: Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <brgl@bgdev.pl>,
Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-clk@vger.kernel.org, linux-mmc@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel@lists.collabora.co.uk,
Yifeng Zhao <yifeng.zhao@rock-chips.com>,
kernel@collabora.com,
Sebastian Reichel <sebastian.reichel@collabora.com>
Subject: [PATCHv2 11/21] mmc: sdhci-of-dwcmshc: add support for rk3588
Date: Wed, 4 May 2022 23:32:41 +0200 [thread overview]
Message-ID: <20220504213251.264819-12-sebastian.reichel@collabora.com> (raw)
In-Reply-To: <20220504213251.264819-1-sebastian.reichel@collabora.com>
From: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Add support for RK3588's DWCMSHC controller, which is used for
providing the rootfs on the RK3588 evaluation board.
Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
[port from vendor BSP]
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
drivers/mmc/host/sdhci-of-dwcmshc.c | 121 +++++++++++++++++++++++-----
1 file changed, 103 insertions(+), 18 deletions(-)
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index f5fd88c7adef..4e904850973c 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -31,6 +31,7 @@
/* Offset inside the vendor area 1 */
#define DWCMSHC_HOST_CTRL3 0x8
#define DWCMSHC_EMMC_CONTROL 0x2c
+#define DWCMSHC_CARD_IS_EMMC BIT(0)
#define DWCMSHC_ENHANCED_STROBE BIT(8)
#define DWCMSHC_EMMC_ATCTRL 0x40
@@ -39,7 +40,7 @@
#define DWCMSHC_EMMC_DLL_RXCLK 0x804
#define DWCMSHC_EMMC_DLL_TXCLK 0x808
#define DWCMSHC_EMMC_DLL_STRBIN 0x80c
-#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24)
+#define DECMSHC_EMMC_DLL_CMDOUT 0x810
#define DWCMSHC_EMMC_DLL_STATUS0 0x840
#define DWCMSHC_EMMC_DLL_START BIT(0)
#define DWCMSHC_EMMC_DLL_LOCKED BIT(8)
@@ -48,11 +49,21 @@
#define DWCMSHC_EMMC_DLL_START_POINT 16
#define DWCMSHC_EMMC_DLL_INC 8
#define DWCMSHC_EMMC_DLL_DLYENA BIT(27)
-#define DLL_TXCLK_TAPNUM_DEFAULT 0x8
-#define DLL_STRBIN_TAPNUM_DEFAULT 0x8
+#define DLL_TXCLK_TAPNUM_DEFAULT 0x10
+#define DLL_TXCLK_TAPNUM_90_DEGREES 0xA
#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24)
+#define DLL_STRBIN_TAPNUM_DEFAULT 0x8
+#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24)
+#define DLL_STRBIN_DELAY_NUM_SEL BIT(26)
+#define DLL_STRBIN_DELAY_NUM_OFFSET 16
+#define DLL_STRBIN_DELAY_NUM_DEFAULT 0x16
#define DLL_RXCLK_NO_INVERTER 1
#define DLL_RXCLK_INVERTER 0
+#define DLL_CMDOUT_TAPNUM_90_DEGREES 0x8
+#define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24)
+#define DLL_CMDOUT_SRC_CLK_NEG BIT(28)
+#define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29)
+
#define DLL_LOCK_WO_TMOUT(x) \
((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
(((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0))
@@ -61,10 +72,16 @@
#define BOUNDARY_OK(addr, len) \
((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1)))
+enum dwcmshc_rk_type {
+ DWCMSHC_RK3568,
+ DWCMSHC_RK3588,
+};
+
struct rk35xx_priv {
/* Rockchip specified optional clocks */
struct clk_bulk_data rockchip_clks[RK35xx_MAX_CLKS];
struct reset_control *reset;
+ enum dwcmshc_rk_type devtype;
u8 txclk_tapnum;
};
@@ -133,7 +150,9 @@ static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq)
static void dwcmshc_set_uhs_signaling(struct sdhci_host *host,
unsigned int timing)
{
- u16 ctrl_2;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+ u16 ctrl, ctrl_2;
ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
/* Select Bus Speed Mode for host */
@@ -151,8 +170,15 @@ static void dwcmshc_set_uhs_signaling(struct sdhci_host *host,
else if ((timing == MMC_TIMING_UHS_DDR50) ||
(timing == MMC_TIMING_MMC_DDR52))
ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
- else if (timing == MMC_TIMING_MMC_HS400)
+ else if (timing == MMC_TIMING_MMC_HS400) {
+ /* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */
+ ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
+ ctrl |= DWCMSHC_CARD_IS_EMMC;
+ sdhci_writew(host, ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
+
ctrl_2 |= DWCMSHC_CTRL_HS400;
+ }
+
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
@@ -185,17 +211,11 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock
host->mmc->actual_clock = 0;
- /*
- * DO NOT TOUCH THIS SETTING. RX clk inverter unit is enabled
- * by default, but it shouldn't be enabled. We should anyway
- * disable it before issuing any cmds.
- */
- extra = DWCMSHC_EMMC_DLL_DLYENA |
- DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
- sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
-
- if (clock == 0)
+ if (clock == 0) {
+ /* Disable interface clock at initial state. */
+ sdhci_set_clock(host, clock);
return;
+ }
/* Rockchip platform only support 375KHz for identify mode */
if (clock <= 400000)
@@ -213,9 +233,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock
extra &= ~BIT(0);
sdhci_writel(host, extra, reg);
- if (clock <= 400000) {
- /* Disable DLL to reset sample clock */
+ if (clock <= 52000000) {
+ /* Disable DLL and reset both of sample and drive clock */
sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_RXCLK);
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
+ sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT);
+ /*
+ * Before switching to hs400es mode, the driver will enable
+ * enhanced strobe first. PHY needs to configure the parameters
+ * of enhanced strobe first.
+ */
+ extra = DWCMSHC_EMMC_DLL_DLYENA |
+ DLL_STRBIN_DELAY_NUM_SEL |
+ DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
return;
}
@@ -224,6 +256,15 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock
udelay(1);
sdhci_writel(host, 0x0, DWCMSHC_EMMC_DLL_CTRL);
+ /*
+ * We shouldn't set DLL_RXCLK_NO_INVERTER for identify mode but
+ * we must set it in higher speed mode.
+ */
+ extra = DWCMSHC_EMMC_DLL_DLYENA;
+ if (priv->devtype == DWCMSHC_RK3568)
+ extra |= DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
+
/* Init DLL settings */
extra = 0x5 << DWCMSHC_EMMC_DLL_START_POINT |
0x2 << DWCMSHC_EMMC_DLL_INC |
@@ -246,8 +287,20 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock
host->mmc->ios.timing == MMC_TIMING_MMC_HS400)
txclk_tapnum = priv->txclk_tapnum;
+ if ((priv->devtype == DWCMSHC_RK3588) && host->mmc->ios.timing == MMC_TIMING_MMC_HS400) {
+ txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES;
+
+ extra = DLL_CMDOUT_SRC_CLK_NEG |
+ DLL_CMDOUT_EN_SRC_CLK_NEG |
+ DWCMSHC_EMMC_DLL_DLYENA |
+ DLL_CMDOUT_TAPNUM_90_DEGREES |
+ DLL_CMDOUT_TAPNUM_FROM_SW;
+ sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT);
+ }
+
extra = DWCMSHC_EMMC_DLL_DLYENA |
DLL_TXCLK_TAPNUM_FROM_SW |
+ DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL |
txclk_tapnum;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);
@@ -345,7 +398,25 @@ static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc
return 0;
}
+static void dwcmshc_rk35xx_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
+{
+ /*
+ * Don't support highspeed bus mode with low clk speed as we
+ * cannot use DLL for this condition.
+ */
+ if (host->mmc->f_max <= 52000000) {
+ dev_info(mmc_dev(host->mmc), "Disabling HS200/HS400, frequency too low (%d)\n",
+ host->mmc->f_max);
+ host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400);
+ host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR);
+ }
+}
+
static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
+ {
+ .compatible = "rockchip,rk3588-dwcmshc",
+ .data = &sdhci_dwcmshc_rk35xx_pdata,
+ },
{
.compatible = "rockchip,rk3568-dwcmshc",
.data = &sdhci_dwcmshc_rk35xx_pdata,
@@ -433,6 +504,11 @@ static int dwcmshc_probe(struct platform_device *pdev)
goto err_clk;
}
+ if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc"))
+ rk_priv->devtype = DWCMSHC_RK3588;
+ else
+ rk_priv->devtype = DWCMSHC_RK3568;
+
priv->priv = rk_priv;
err = dwcmshc_rk35xx_init(host, priv);
@@ -442,12 +518,21 @@ static int dwcmshc_probe(struct platform_device *pdev)
host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
- err = sdhci_add_host(host);
+ err = sdhci_setup_host(host);
if (err)
goto err_clk;
+ if (rk_priv)
+ dwcmshc_rk35xx_postinit(host, priv);
+
+ err = __sdhci_add_host(host);
+ if (err)
+ goto err_setup_host;
+
return 0;
+err_setup_host:
+ sdhci_cleanup_host(host);
err_clk:
clk_disable_unprepare(pltfm_host->clk);
clk_disable_unprepare(priv->bus_clk);
--
2.35.1
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next prev parent reply other threads:[~2022-05-04 21:38 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 21:32 [PATCHv2 00/21] Basic RK3588 Support Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 01/21] dt-bindings: pinctrl: rockchip: add rk3588 Sebastian Reichel
2022-05-05 14:14 ` Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 02/21] dt-bindings: mmc: sdhci-of-dwcmhsc: Add rk3588 Sebastian Reichel
2022-05-05 14:15 ` Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 03/21] dt-binding: clock: Document rockchip, rk3588-cru bindings Sebastian Reichel
2022-05-17 0:01 ` [PATCHv2 03/21] dt-binding: clock: Document rockchip,rk3588-cru bindings Rob Herring
2022-05-04 21:32 ` [PATCHv2 04/21] clk: rockchip: add register offset of the cores select parent Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 05/21] clk: rockchip: add pll type for RK3588 Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 06/21] clk: rockchip: clk-cpu: add mux setting for cpu change frequency Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 07/21] clk: rockchip: add dt-binding header for rk3588 Sebastian Reichel
2022-05-17 0:03 ` Rob Herring
2022-05-04 21:32 ` [PATCHv2 09/21] mmc: sdhci-of-dwcmshc: add reset call back for rockchip Socs Sebastian Reichel
2022-05-06 8:52 ` Ulf Hansson
2022-05-06 9:18 ` Sebastian Reichel
2022-05-06 12:37 ` Ulf Hansson
2022-05-31 13:38 ` Ulf Hansson
2022-05-04 21:32 ` [PATCHv2 10/21] mmc: sdhci-of-dwcmshc: rename rk3568 to rk35xx Sebastian Reichel
2022-05-31 13:38 ` Ulf Hansson
2022-05-04 21:32 ` Sebastian Reichel [this message]
2022-05-31 13:38 ` [PATCHv2 11/21] mmc: sdhci-of-dwcmshc: add support for rk3588 Ulf Hansson
2022-05-04 21:32 ` [PATCHv2 12/21] pinctrl/rockchip: add error handling for pull/drive register getters Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 13/21] pinctrl/rockchip: add rk3588 support Sebastian Reichel
2022-05-05 13:51 ` Nicolas Frattaroli
2022-05-05 14:11 ` Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 14/21] gpio: rockchip: add support for rk3588 Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 15/21] dt-bindings: serial: snps-dw-apb-uart: Add Rockchip RK3588 Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 16/21] dt-bindings: soc: rockchip: add initial rk3588 syscon compatibles Sebastian Reichel
2022-05-17 0:04 ` Rob Herring
2022-05-04 21:32 ` [PATCHv2 17/21] dt-bindings: gpio: rockchip: add gpio-ranges Sebastian Reichel
2022-05-17 0:04 ` Rob Herring
2022-05-04 21:32 ` [PATCHv2 18/21] dt-bindings: pinctrl: rockchip: increase max amount of device functions Sebastian Reichel
2022-05-17 0:05 ` Rob Herring
2022-05-19 13:04 ` Linus Walleij
2022-05-04 21:32 ` [PATCHv2 19/21] arm64: dts: rockchip: Add rk3588s pinctrl data Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 20/21] arm64: dts: rockchip: Add base DT for rk3588 SoC Sebastian Reichel
2022-05-04 21:32 ` [PATCHv2 21/21] arm64: dts: rockchip: Add rk3588-evb1 board Sebastian Reichel
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