From patchwork Tue Aug 6 07:20:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 817984 Received: from mail-m3271.qiye.163.com (mail-m3271.qiye.163.com [220.197.32.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DAD723A1B0; Tue, 6 Aug 2024 15:40:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.32.71 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722958814; cv=none; b=sfHyqaTpN0sj/CaNKuEqyg/3uPlFhUzgaMnhsHCqv1u/FNMoHtHrTCM0SKEpwiNs8bIPLlnnfGeXlw4zjs6KXK+mXjlCYvPkTt3f6IOpv5gUI7Fpv+KVw6kSg0cKvfDLZ0TBxtxp5fA8y26s2GRk+LkvkCLImSyNX9eceiQFVCY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722958814; c=relaxed/simple; bh=oiVij8yXrQ4HoHUAyyPgV/zKGLN0rn2QIxMusS0V/js=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=auJo9ErCmC9AxmcAAf/2dOnLM8spEssvUsS7jq8WYe6g8rRRm9am/D2ZlK1LeDeMJMGWsf5jO/t8VIz2tJ137ZLgVF/kSs5ke94lSGctFNuKGd8d7upn4AIYrPp/5kkN4TboJWk138Y28d+3cq/wpuqsjAiBC9kjV3R5ajYMUt8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com; spf=pass smtp.mailfrom=rock-chips.com; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b=KmFcQ+P4; arc=none smtp.client-ip=220.197.32.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b="KmFcQ+P4" DKIM-Signature: a=rsa-sha256; b=KmFcQ+P45xnoXdRESCCWOieY/RF9ihx0sCUaCOywFSvf4TaN/Vug2Bm1NdYK4XieF5H0KyHres+mqomSq5RkBqPiuPeg3aRV2gsNArdUNQoIqn/bMzGC3K/d3+nxdHRudbyGKqbX81sP9YsjDNwshRbh4q/QfPYM3pcNQz+cLJU=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=rYU1gGIy7sPRNpW+QDl/fzqGRyqJB+0BOpvkXIZ7LIA=; h=date:mime-version:subject:message-id:from; Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.qiye.163.com (Hmail) with ESMTPA id F3E83460517; Tue, 6 Aug 2024 15:20:31 +0800 (CST) From: Shawn Lin To: Rob Herring , "Martin K . Petersen" Cc: Heiko Stuebner , Alim Akhtar , Avri Altman , Bart Van Assche , YiFeng Zhao , Liang Chen , linux-scsi@vger.kernel.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, Shawn Lin Subject: [PATCH v1 3/3] scsi: ufs: rockchip: init support for UFS Date: Tue, 6 Aug 2024 15:20:00 +0800 Message-Id: <1722928800-137042-4-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1722928800-137042-1-git-send-email-shawn.lin@rock-chips.com> References: <1722928800-137042-1-git-send-email-shawn.lin@rock-chips.com> X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZGkJLSVZMSR9CHx9PH0oYHx5WFRQJFh oXVRMBExYaEhckFA4PWVdZGBILWUFZTkNVSUlVTFVKSk9ZV1kWGg8SFR0UWUFZT0tIVUpLSUhCSE NVSktLVUpCS0tZBg++ X-HM-Tid: 0a91268fa05303aekunmf3e83460517 X-HM-MType: 1 X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6NU06MRw6CzI*CxIPCjwwTikw ME4aChpVSlVKTElJQklDQ0hISExOVTMWGhIXVQgTGgwVVRcSFTsJFBgQVhgTEgsIVRgUFkVZV1kS C1lBWU5DVUlJVUxVSkpPWVdZCAFZQUpCTUhKNwY+ Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: RK3576 contains a UFS controller, add init support fot it. Signed-off-by: Shawn Lin --- drivers/ufs/host/Kconfig | 12 + drivers/ufs/host/Makefile | 1 + drivers/ufs/host/ufs-rockchip.c | 477 ++++++++++++++++++++++++++++++++++++++++ drivers/ufs/host/ufs-rockchip.h | 52 +++++ 4 files changed, 542 insertions(+) create mode 100644 drivers/ufs/host/ufs-rockchip.c create mode 100644 drivers/ufs/host/ufs-rockchip.h diff --git a/drivers/ufs/host/Kconfig b/drivers/ufs/host/Kconfig index 580c8d0..fafaa33 100644 --- a/drivers/ufs/host/Kconfig +++ b/drivers/ufs/host/Kconfig @@ -142,3 +142,15 @@ config SCSI_UFS_SPRD Select this if you have UFS controller on Unisoc chipset. If unsure, say N. + +config SCSI_UFS_ROCKCHIP + tristate "Rockchip specific hooks to UFS controller platform driver" + depends on SCSI_UFSHCD_PLATFORM && (ARCH_ROCKCHIP || COMPILE_TEST) + help + This selects the Rockchip specific additions to UFSHCD platform driver. + UFS host on Rockchip needs some vendor specific configuration before + accessing the hardware which includes PHY configuration and vendor + specific registers. + + Select this if you have UFS controller on Rockchip chipset. + If unsure, say N. diff --git a/drivers/ufs/host/Makefile b/drivers/ufs/host/Makefile index 4573aea..2f97feb 100644 --- a/drivers/ufs/host/Makefile +++ b/drivers/ufs/host/Makefile @@ -10,5 +10,6 @@ obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o obj-$(CONFIG_SCSI_UFS_HISI) += ufs-hisi.o obj-$(CONFIG_SCSI_UFS_MEDIATEK) += ufs-mediatek.o obj-$(CONFIG_SCSI_UFS_RENESAS) += ufs-renesas.o +obj-$(CONFIG_SCSI_UFS_ROCKCHIP) += ufs-rockchip.o obj-$(CONFIG_SCSI_UFS_SPRD) += ufs-sprd.o obj-$(CONFIG_SCSI_UFS_TI_J721E) += ti-j721e-ufs.o diff --git a/drivers/ufs/host/ufs-rockchip.c b/drivers/ufs/host/ufs-rockchip.c new file mode 100644 index 0000000..3220d6f --- /dev/null +++ b/drivers/ufs/host/ufs-rockchip.c @@ -0,0 +1,477 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Rockchip UFS Host Controller driver + * + * Copyright (C) 2024 Rockchip Electronics Co.Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include "ufshcd-pltfrm.h" +#include "ufshcd-dwc.h" +#include "ufs-rockchip.h" + +static inline bool ufshcd_is_device_present(struct ufs_hba *hba) +{ + return ufshcd_readl(hba, REG_CONTROLLER_STATUS) & DEVICE_PRESENT; +} + +static int ufs_rockchip_hce_enable_notify(struct ufs_hba *hba, + enum ufs_notify_change_status status) +{ + int err = 0; + + if (status == PRE_CHANGE) { + int retry_outer = 3; + int retry_inner; +start: + if (ufshcd_is_hba_active(hba)) + /* change controller state to "reset state" */ + ufshcd_hba_stop(hba); + + /* UniPro link is disabled at this point */ + ufshcd_set_link_off(hba); + + /* start controller initialization sequence */ + ufshcd_writel(hba, CONTROLLER_ENABLE, REG_CONTROLLER_ENABLE); + + usleep_range(100, 200); + + /* wait for the host controller to complete initialization */ + retry_inner = 50; + while (!ufshcd_is_hba_active(hba)) { + if (retry_inner) { + retry_inner--; + } else { + dev_err(hba->dev, + "Controller enable failed\n"); + if (retry_outer) { + retry_outer--; + goto start; + } + return -EIO; + } + usleep_range(1000, 1100); + } + } else { /* POST_CHANGE */ + err = ufshcd_vops_phy_initialization(hba); + } + + return err; +} + +static void ufs_rockchip_set_pm_lvl(struct ufs_hba *hba) +{ + hba->rpm_lvl = UFS_PM_LVL_1; + hba->spm_lvl = UFS_PM_LVL_3; +} + +static const unsigned char rk3576_phy_value[15][4] = { + {0x03, 0x38, 0x50, 0x80}, + {0x03, 0x14, 0x58, 0x80}, + {0x03, 0x26, 0x58, 0x80}, + {0x03, 0x49, 0x58, 0x80}, + {0x03, 0x5A, 0x58, 0x80}, + {0xC3, 0x38, 0x50, 0xC0}, + {0xC3, 0x14, 0x58, 0xC0}, + {0xC3, 0x26, 0x58, 0xC0}, + {0xC3, 0x49, 0x58, 0xC0}, + {0xC3, 0x5A, 0x58, 0xC0}, + {0x43, 0x38, 0x50, 0xC0}, + {0x43, 0x14, 0x58, 0xC0}, + {0x43, 0x26, 0x58, 0xC0}, + {0x43, 0x49, 0x58, 0xC0}, + {0x43, 0x5A, 0x58, 0xC0} +}; + +static int ufs_rockchip_rk3576_phy_init(struct ufs_hba *hba) +{ + struct ufs_rockchip_host *host = ufshcd_get_variant(hba); + u32 try_case = host->phy_config_mode, value; + + if (try_case >= ARRAY_SIZE(rk3576_phy_value)) + try_case = 0; + + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(PA_LOCAL_TX_LCC_ENABLE, 0x0), 0x0); + /* enable the mphy DME_SET cfg */ + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x200, 0x0), 0x40); + for (int i = 0; i < 2; i++) { + /* Configuration M-TX */ + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0xaa, SEL_TX_LANE0 + i), 0x06); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0xa9, SEL_TX_LANE0 + i), 0x02); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0xad, SEL_TX_LANE0 + i), 0x44); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0xac, SEL_TX_LANE0 + i), 0xe6); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0xab, SEL_TX_LANE0 + i), 0x07); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x94, SEL_TX_LANE0 + i), 0x93); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x93, SEL_TX_LANE0 + i), 0xc9); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x7f, SEL_TX_LANE0 + i), 0x00); + /* Configuration M-RX */ + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x12, SEL_RX_LANE0 + i), 0x06); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x11, SEL_RX_LANE0 + i), 0x00); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x1d, SEL_RX_LANE0 + i), 0x58); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x1c, SEL_RX_LANE0 + i), 0x8c); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x1b, SEL_RX_LANE0 + i), 0x02); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x25, SEL_RX_LANE0 + i), 0xf6); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x2f, SEL_RX_LANE0 + i), 0x69); + } + /* disable the mphy DME_SET cfg */ + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x200, 0x0), 0x00); + + ufs_sys_writel(host->mphy_base, 0x80, 0x08C); + ufs_sys_writel(host->mphy_base, 0xB5, 0x110); + ufs_sys_writel(host->mphy_base, 0xB5, 0x250); + + value = rk3576_phy_value[try_case][0]; + ufs_sys_writel(host->mphy_base, value, 0x134); + ufs_sys_writel(host->mphy_base, value, 0x274); + + value = rk3576_phy_value[try_case][1]; + ufs_sys_writel(host->mphy_base, value, 0x0E0); + ufs_sys_writel(host->mphy_base, value, 0x220); + + value = rk3576_phy_value[try_case][2]; + ufs_sys_writel(host->mphy_base, value, 0x164); + ufs_sys_writel(host->mphy_base, value, 0x2A4); + + value = rk3576_phy_value[try_case][3]; + ufs_sys_writel(host->mphy_base, value, 0x178); + ufs_sys_writel(host->mphy_base, value, 0x2B8); + + ufs_sys_writel(host->mphy_base, 0x18, 0x1B0); + ufs_sys_writel(host->mphy_base, 0x18, 0x2F0); + + ufs_sys_writel(host->mphy_base, 0x03, 0x128); + ufs_sys_writel(host->mphy_base, 0x03, 0x268); + + ufs_sys_writel(host->mphy_base, 0x20, 0x12C); + ufs_sys_writel(host->mphy_base, 0x20, 0x26C); + + ufs_sys_writel(host->mphy_base, 0xC0, 0x120); + ufs_sys_writel(host->mphy_base, 0xC0, 0x260); + + ufs_sys_writel(host->mphy_base, 0x03, 0x094); + + ufs_sys_writel(host->mphy_base, 0x03, 0x1B4); + ufs_sys_writel(host->mphy_base, 0x03, 0x2F4); + + ufs_sys_writel(host->mphy_base, 0xC0, 0x08C); + udelay(1); + ufs_sys_writel(host->mphy_base, 0x00, 0x08C); + + udelay(200); + /* start link up */ + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(MIB_T_DBG_CPORT_TX_ENDIAN, 0), 0x0); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(MIB_T_DBG_CPORT_RX_ENDIAN, 0), 0x0); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(N_DEVICEID, 0), 0x0); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(N_DEVICEID_VALID, 0), 0x1); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(T_PEERDEVICEID, 0), 0x1); + ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(T_CONNECTIONSTATE, 0), 0x1); + + return 0; +} + +static int ufs_rockchip_common_init(struct ufs_hba *hba) +{ + struct device *dev = hba->dev; + struct platform_device *pdev = to_platform_device(dev); + struct ufs_rockchip_host *host; + int err = 0; + + host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); + if (!host) + return -ENOMEM; + + /* system control register for hci */ + host->ufs_sys_ctrl = devm_platform_ioremap_resource_byname(pdev, "hci_grf"); + if (IS_ERR(host->ufs_sys_ctrl)) { + dev_err(dev, "cannot ioremap for hci system control register\n"); + return PTR_ERR(host->ufs_sys_ctrl); + } + + /* system control register for mphy */ + host->ufs_phy_ctrl = devm_platform_ioremap_resource_byname(pdev, "mphy_grf"); + if (IS_ERR(host->ufs_phy_ctrl)) { + dev_err(dev, "cannot ioremap for mphy system control register\n"); + return PTR_ERR(host->ufs_phy_ctrl); + } + + /* mphy base register */ + host->mphy_base = devm_platform_ioremap_resource_byname(pdev, "mphy"); + if (IS_ERR(host->mphy_base)) { + dev_err(dev, "cannot ioremap for mphy base register\n"); + return PTR_ERR(host->mphy_base); + } + + host->rst = devm_reset_control_array_get_exclusive(dev); + if (IS_ERR(host->rst)) { + dev_err(dev, "failed to get reset control\n"); + return PTR_ERR(host->rst); + } + + reset_control_assert(host->rst); + udelay(1); + reset_control_deassert(host->rst); + + host->ref_out_clk = devm_clk_get(dev, "ref_out"); + if (IS_ERR(host->ref_out_clk)) { + dev_err(dev, "ciu-drive not available\n"); + return PTR_ERR(host->ref_out_clk); + } + err = clk_prepare_enable(host->ref_out_clk); + if (err) { + dev_err(dev, "failed to enable ref out clock %d\n", err); + return err; + } + + host->rst_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(host->rst_gpio)) { + dev_err(&pdev->dev, "invalid reset-gpios property in node\n"); + err = PTR_ERR(host->rst_gpio); + goto out; + } + udelay(20); + gpiod_set_value_cansleep(host->rst_gpio, 1); + + host->clks[0].id = "core"; + host->clks[1].id = "pclk"; + host->clks[2].id = "pclk_mphy"; + err = devm_clk_bulk_get_optional(dev, UFS_MAX_CLKS, host->clks); + if (err) { + dev_err(dev, "failed to get clocks %d\n", err); + goto out; + } + + err = clk_bulk_prepare_enable(UFS_MAX_CLKS, host->clks); + if (err) { + dev_err(dev, "failed to enable clocks %d\n", err); + goto out; + } + + if (device_property_read_u32(dev, "ufs-phy-config-mode", + &host->phy_config_mode)) + host->phy_config_mode = 0; + + pm_runtime_set_active(&pdev->dev); + + host->hba = hba; + ufs_rockchip_set_pm_lvl(hba); + + ufshcd_set_variant(hba, host); + + return 0; +out: + clk_disable_unprepare(host->ref_out_clk); + return err; +} + +static int ufs_rockchip_rk3576_init(struct ufs_hba *hba) +{ + int ret = 0; + struct device *dev = hba->dev; + + hba->quirks = UFSHCI_QUIRK_BROKEN_HCE | UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING; + + /* Enable BKOPS when suspend */ + hba->caps |= UFSHCD_CAP_AUTO_BKOPS_SUSPEND; + /* Enable putting device into deep sleep */ + hba->caps |= UFSHCD_CAP_DEEPSLEEP; + /* Enable devfreq of UFS */ + hba->caps |= UFSHCD_CAP_CLK_SCALING; + /* Enable WriteBooster */ + hba->caps |= UFSHCD_CAP_WB_EN; + + ret = ufs_rockchip_common_init(hba); + if (ret) { + dev_err(dev, "ufs common init fail\n"); + return ret; + } + + return 0; +} + +static int ufs_rockchip_device_reset(struct ufs_hba *hba) +{ + struct ufs_rockchip_host *host = ufshcd_get_variant(hba); + + if (!host->rst_gpio) + return -EOPNOTSUPP; + + gpiod_set_value_cansleep(host->rst_gpio, 0); + udelay(20); + + gpiod_set_value_cansleep(host->rst_gpio, 1); + udelay(20); + + return 0; +} + +static const struct ufs_hba_variant_ops ufs_hba_rk3576_vops = { + .name = "rk3576", + .init = ufs_rockchip_rk3576_init, + .device_reset = ufs_rockchip_device_reset, + .hce_enable_notify = ufs_rockchip_hce_enable_notify, + .phy_initialization = ufs_rockchip_rk3576_phy_init, +}; + +static const struct of_device_id ufs_rockchip_of_match[] = { + { .compatible = "rockchip,rk3576-ufs", .data = &ufs_hba_rk3576_vops}, + {}, +}; +MODULE_DEVICE_TABLE(of, ufs_rockchip_of_match); + +static int ufs_rockchip_probe(struct platform_device *pdev) +{ + int err; + struct device *dev = &pdev->dev; + const struct ufs_hba_variant_ops *vops; + + vops = device_get_match_data(dev); + err = ufshcd_pltfrm_init(pdev, vops); + if (err) + dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err); + + return err; +} + +static void ufs_rockchip_remove(struct platform_device *pdev) +{ + struct ufs_hba *hba = platform_get_drvdata(pdev); + struct ufs_rockchip_host *host = ufshcd_get_variant(hba); + + pm_runtime_forbid(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); + ufshcd_remove(hba); + ufshcd_dealloc_host(hba); + clk_disable_unprepare(host->ref_out_clk); +} + +static int ufs_rockchip_restore_link(struct ufs_hba *hba, bool is_store) +{ + struct ufs_rockchip_host *host = ufshcd_get_variant(hba); + int err, retry = 3; + + if (is_store) { + host->ie = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); + host->ahit = ufshcd_readl(hba, REG_AUTO_HIBERNATE_IDLE_TIMER); + return 0; + } + + /* Enable controller */ + err = ufshcd_hba_enable(hba); + if (err) + return err; + + /* Link startup and wait for DP */ + do { + err = ufshcd_dme_link_startup(hba); + if (!err && ufshcd_is_device_present(hba)) { + dev_dbg_ratelimited(hba->dev, "rockchip link startup successfully.\n"); + break; + } + } while (retry--); + + if (retry < 0) { + dev_err(hba->dev, "rockchip link startup failed.\n"); + return -ENXIO; + } + + /* Restore negotiated power mode */ + err = ufshcd_config_pwr_mode(hba, &(hba->pwr_info)); + if (err) + dev_err(hba->dev, "Failed to restore power mode, err = %d\n", err); + + /* Restore task and transfer list */ + ufshcd_writel(hba, 0xffffffff, REG_INTERRUPT_STATUS); + ufshcd_make_hba_operational(hba); + + /* Restore lost regs */ + ufshcd_writel(hba, host->ie, REG_INTERRUPT_ENABLE); + ufshcd_writel(hba, host->ahit, REG_AUTO_HIBERNATE_IDLE_TIMER); + ufshcd_writel(hba, 0x1, REG_UTP_TRANSFER_REQ_LIST_RUN_STOP); + ufshcd_writel(hba, 0x1, REG_UTP_TASK_REQ_LIST_RUN_STOP); + + return err; +} + +static int ufs_rockchip_runtime_suspend(struct device *dev) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + struct ufs_rockchip_host *host = ufshcd_get_variant(hba); + + clk_disable_unprepare(host->ref_out_clk); + return ufs_rockchip_restore_link(hba, true); +} + +static int ufs_rockchip_runtime_resume(struct device *dev) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + struct ufs_rockchip_host *host = ufshcd_get_variant(hba); + int err; + + err = clk_prepare_enable(host->ref_out_clk); + if (err) { + dev_err(hba->dev, "failed to enable ref out clock %d\n", err); + return err; + } + + reset_control_assert(host->rst); + udelay(1); + reset_control_deassert(host->rst); + + return ufs_rockchip_restore_link(hba, false); +} + +static int ufs_rockchip_suspend(struct device *dev) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + if (pm_runtime_suspended(hba->dev)) + return 0; + + ufs_rockchip_restore_link(hba, true); + + return 0; +} + +static int ufs_rockchip_resume(struct device *dev) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + if (pm_runtime_suspended(hba->dev)) + return 0; + + /* Reset device if possible */ + ufs_rockchip_device_reset(hba); + ufs_rockchip_restore_link(hba, false); + + return 0; +} + +static const struct dev_pm_ops ufs_rockchip_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ufs_rockchip_suspend, ufs_rockchip_resume) + SET_RUNTIME_PM_OPS(ufs_rockchip_runtime_suspend, ufs_rockchip_runtime_resume, NULL) + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, +}; + +static struct platform_driver ufs_rockchip_pltform = { + .probe = ufs_rockchip_probe, + .remove = ufs_rockchip_remove, + .driver = { + .name = "ufshcd-rockchip", + .pm = &ufs_rockchip_pm_ops, + .of_match_table = of_match_ptr(ufs_rockchip_of_match), + }, +}; +module_platform_driver(ufs_rockchip_pltform); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Rockchip UFS Host Driver"); diff --git a/drivers/ufs/host/ufs-rockchip.h b/drivers/ufs/host/ufs-rockchip.h new file mode 100644 index 0000000..7f3c260 --- /dev/null +++ b/drivers/ufs/host/ufs-rockchip.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Rockchip UFS Host Controller driver + * + * Copyright (C) 2024 Rockchip Electronics Co.Ltd. + */ + +#ifndef _UFS_ROCKCHIP_H_ +#define _UFS_ROCKCHIP_H_ + +#define UFS_MAX_CLKS 3 + +#define SEL_TX_LANE0 0x0 +#define SEL_TX_LANE1 0x1 +#define SEL_TX_LANE2 0x2 +#define SEL_TX_LANE3 0x3 +#define SEL_RX_LANE0 0x4 +#define SEL_RX_LANE1 0x5 +#define SEL_RX_LANE2 0x6 +#define SEL_RX_LANE3 0x7 + +#define MIB_T_DBG_CPORT_TX_ENDIAN 0xc022 +#define MIB_T_DBG_CPORT_RX_ENDIAN 0xc023 + +struct ufs_rockchip_host { + struct ufs_hba *hba; + void __iomem *ufs_phy_ctrl; + void __iomem *ufs_sys_ctrl; + void __iomem *mphy_base; + struct gpio_desc *rst_gpio; + struct reset_control *rst; + struct clk *ref_out_clk; + struct clk_bulk_data clks[UFS_MAX_CLKS]; + uint64_t caps; + uint32_t phy_config_mode; + bool in_suspend; + u32 ie; + u32 ahit; +}; + +#define ufs_sys_writel(base, val, reg) \ + writel((val), (base) + (reg)) +#define ufs_sys_readl(base, reg) readl((base) + (reg)) +#define ufs_sys_set_bits(base, mask, reg) \ + ufs_sys_writel( \ + (base), ((mask) | (ufs_sys_readl((base), (reg)))), (reg)) +#define ufs_sys_ctrl_clr_bits(base, mask, reg) \ + ufs_sys_writel((base), \ + ((~(mask)) & (ufs_sys_readl((base), (reg)))), \ + (reg)) + +#endif /* _UFS_ROCKCHIP_H_ */