Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759433AbaGPLPG (ORCPT ); Wed, 16 Jul 2014 07:15:06 -0400 Received: from mx1.redhat.com ([209.132.183.28]:25068 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751422AbaGPLPA (ORCPT ); Wed, 16 Jul 2014 07:15:00 -0400 Message-ID: <53C65E96.9070508@redhat.com> Date: Wed, 16 Jul 2014 13:14:30 +0200 From: Hans de Goede User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Mikko Perttunen , swarren@wwwdotorg.org, thierry.reding@gmail.com, tj@kernel.org CC: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-ide@vger.kernel.org Subject: Re: [PATCH v3 7/8] ata: Add support for the Tegra124 SATA controller References: <1405500863-19696-1-git-send-email-mperttunen@nvidia.com> <1405500863-19696-8-git-send-email-mperttunen@nvidia.com> In-Reply-To: <1405500863-19696-8-git-send-email-mperttunen@nvidia.com> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Thanks for making the changes to use more libahci_platform functionality. Overall this looks good, I've a few small remarks inline. On 07/16/2014 10:54 AM, Mikko Perttunen wrote: > This adds support for the integrated AHCI-compliant Serial ATA > controller present on the NVIDIA Tegra124 system-on-chip. > > Signed-off-by: Mikko Perttunen > --- > changes since v2: > - remove fuse reading: now there is no dependency on the fuse series, > so merging should be easier. always using the zeroth calibration > values works for me anyway. the fuse code should be added back once > fuses have landed, in 3.17-rc1 or 3.18. > - put calibration value variables on their own lines. > - back to using ahci_platform to manage some resources > - code style fixes > > drivers/ata/Kconfig | 9 ++ > drivers/ata/Makefile | 1 + > drivers/ata/ahci_tegra.c | 406 +++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 416 insertions(+) > create mode 100644 drivers/ata/ahci_tegra.c > > diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig > index b0d5b5a..e1b9278 100644 > --- a/drivers/ata/Kconfig > +++ b/drivers/ata/Kconfig > @@ -142,6 +142,15 @@ config AHCI_SUNXI > > If unsure, say N. > > +config AHCI_TEGRA > + tristate "NVIDIA Tegra124 AHCI SATA support" > + depends on ARCH_TEGRA > + help > + This option enables support for the NVIDIA Tegra124 SoC's > + onboard AHCI SATA. > + > + If unsure, say N. > + > config AHCI_XGENE > tristate "APM X-Gene 6.0Gbps AHCI SATA host controller support" > depends on PHY_XGENE > diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile > index 5a02aee..ae41107 100644 > --- a/drivers/ata/Makefile > +++ b/drivers/ata/Makefile > @@ -15,6 +15,7 @@ obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o > obj-$(CONFIG_AHCI_MVEBU) += ahci_mvebu.o libahci.o libahci_platform.o > obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o > obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o > +obj-$(CONFIG_AHCI_TEGRA) += ahci_tegra.o libahci.o libahci_platform.o > obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o libahci.o libahci_platform.o > > # SFF w/ custom DMA > diff --git a/drivers/ata/ahci_tegra.c b/drivers/ata/ahci_tegra.c > new file mode 100644 > index 0000000..d90d08c > --- /dev/null > +++ b/drivers/ata/ahci_tegra.c > @@ -0,0 +1,406 @@ > +/* > + * drivers/ata/ahci_tegra.c > + * > + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. > + * > + * Author: > + * Mikko Perttunen > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include "ahci.h" > + > +#define SATA_CONFIGURATION_0 0x180 > +#define SATA_CONFIGURATION_EN_FPCI BIT(0) > + > +#define SCFG_OFFSET 0x1000 > + > +#define T_SATA0_CFG_1 0x04 > +#define T_SATA0_CFG_1_IO_SPACE BIT(0) > +#define T_SATA0_CFG_1_MEMORY_SPACE BIT(1) > +#define T_SATA0_CFG_1_BUS_MASTER BIT(2) > +#define T_SATA0_CFG_1_SERR BIT(8) > + > +#define T_SATA0_CFG_9 0x24 > +#define T_SATA0_CFG_9_BASE_ADDRESS_SHIFT 13 > + > +#define SATA_FPCI_BAR5 0x94 > +#define SATA_FPCI_BAR5_START_SHIFT 4 > + > +#define SATA_INTR_MASK 0x188 > +#define SATA_INTR_MASK_IP_INT_MASK BIT(16) > + > +#define T_SATA0_AHCI_HBA_CAP_BKDR 0x300 > + > +#define T_SATA0_BKDOOR_CC 0x4a4 > + > +#define T_SATA0_CFG_SATA 0x54c > +#define T_SATA0_CFG_SATA_BACKDOOR_PROG_IF_EN BIT(12) > + > +#define T_SATA0_CFG_MISC 0x550 > + > +#define T_SATA0_INDEX 0x680 > + > +#define T_SATA0_CHX_PHY_CTRL1_GEN1 0x690 > +#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_MASK 0xff > +#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_SHIFT 0 > +#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_MASK (0xff << 8) > +#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_SHIFT 8 > + > +#define T_SATA0_CHX_PHY_CTRL1_GEN2 0x694 > +#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_AMP_MASK 0xff > +#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_AMP_SHIFT 0 > +#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_PEAK_MASK (0xff << 12) > +#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_PEAK_SHIFT 12 > + > +#define T_SATA0_CHX_PHY_CTRL2 0x69c > +#define T_SATA0_CHX_PHY_CTRL2_CDR_CNTL_GEN1 0x23 > + > +#define T_SATA0_CHX_PHY_CTRL11 0x6d0 > +#define T_SATA0_CHX_PHY_CTRL11_GEN2_RX_EQ (0x2800 << 16) > + > +#define FUSE_SATA_CALIB 0x124 > +#define FUSE_SATA_CALIB_MASK 0x3 > + > +enum sata_clks { > + AHCI_CLK_SATA = 0, > + AHCI_CLK_SATA_OOB = 1, > + AHCI_CLK_CML1 = 2, > + AHCI_CLK_PLL_E = 3 > +}; You should mention that having the clocks in this order is mandatory in Documentation/devicetree/bindings/ata/tegra-sata.txt / in "[PATCH v3 1/8] of: Add NVIDIA Tegra SATA controller binding" > + > +struct sata_pad_calibration { > + u8 gen1_tx_amp; > + u8 gen1_tx_peak; > + u8 gen2_tx_amp; > + u8 gen2_tx_peak; > +}; > + > +static const struct sata_pad_calibration tegra124_pad_calibration[] = { > + {0x18, 0x04, 0x18, 0x0a}, > + {0x0e, 0x04, 0x14, 0x0a}, > + {0x0e, 0x07, 0x1a, 0x0e}, > + {0x14, 0x0e, 0x1a, 0x0e}, > +}; > + > +struct tegra_ahci_priv { > + struct platform_device *pdev; > + void __iomem *sata_regs; > + struct reset_control *sata_rst; > + struct reset_control *sata_oob_rst; > + struct reset_control *sata_cold_rst; > + struct regulator_bulk_data supplies[5]; > +}; > + > +static int tegra_ahci_power_on(struct ahci_host_priv *hpriv) > +{ > + struct tegra_ahci_priv *tegra = hpriv->plat_data; > + int ret; > + > + ret = regulator_bulk_enable(ARRAY_SIZE(tegra->supplies), > + tegra->supplies); > + if (ret) > + return ret; > + > + ret = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_SATA, > + hpriv->clks[AHCI_CLK_SATA], > + tegra->sata_rst); > + if (ret) > + goto disable_regulators; > + > + reset_control_assert(tegra->sata_oob_rst); > + reset_control_assert(tegra->sata_cold_rst); > + > + ret = clk_prepare_enable(hpriv->clks[AHCI_CLK_SATA_OOB]); > + if (ret) > + goto disable_power; > + > + ret = clk_prepare_enable(hpriv->clks[AHCI_CLK_CML1]); > + if (ret) > + goto disable_oob; > + > + ret = clk_prepare_enable(hpriv->clks[AHCI_CLK_PLL_E]); > + if (ret) > + goto disable_cml1; > + > + reset_control_deassert(tegra->sata_cold_rst); > + reset_control_deassert(tegra->sata_oob_rst); > + > + ret = phy_power_on(hpriv->phy); > + if (ret) > + goto disable_plle; > + > + return 0; > + > +disable_plle: > + clk_disable_unprepare(hpriv->clks[AHCI_CLK_PLL_E]); > + > +disable_cml1: > + clk_disable_unprepare(hpriv->clks[AHCI_CLK_CML1]); > + > +disable_oob: > + clk_disable_unprepare(hpriv->clks[AHCI_CLK_SATA_OOB]); > + > +disable_power: > + clk_disable_unprepare(hpriv->clks[AHCI_CLK_SATA]); > + > + tegra_powergate_power_off(TEGRA_POWERGATE_SATA); > + > +disable_regulators: > + regulator_bulk_disable(ARRAY_SIZE(tegra->supplies), tegra->supplies); > + > + return ret; > +} > + > +static void tegra_ahci_power_off(struct ahci_host_priv *hpriv) > +{ > + struct tegra_ahci_priv *tegra = hpriv->plat_data; > + > + ahci_platform_disable_resources(hpriv); Disable resources does a phy_exit, unless this is a nop with your phy driver, you must re-do the phy_init in tegra_ahci_power_on() arguably the phy_init / phy_exit in libahci_platform should be moved to hci_platform_get_resources and ahci_platform_put_resources, if you decide to go for that please make sure you coordinate with other libahci_platform users which use a phy (see the dts files). > + > + reset_control_assert(tegra->sata_rst); > + reset_control_assert(tegra->sata_oob_rst); > + reset_control_assert(tegra->sata_cold_rst); > + > + tegra_powergate_power_off(TEGRA_POWERGATE_SATA); > + > + regulator_bulk_disable(ARRAY_SIZE(tegra->supplies), tegra->supplies); > +} > + > +static int tegra_ahci_controller_init(struct ahci_host_priv *hpriv) > +{ > + struct tegra_ahci_priv *tegra = hpriv->plat_data; > + int ret; > + unsigned int val; > + struct sata_pad_calibration calib; > + > + ret = tegra_ahci_power_on(hpriv); > + if (ret) { > + dev_err(&tegra->pdev->dev, > + "failed to power on AHCI controller: %d\n", ret); > + return ret; > + } > + > + val = readl(tegra->sata_regs + SATA_CONFIGURATION_0); > + val |= SATA_CONFIGURATION_EN_FPCI; > + writel(val, tegra->sata_regs + SATA_CONFIGURATION_0); > + > + /* Pad calibration */ > + > + /* FIXME Always use calibration 0. Change this to read the calibration > + * fuse once the fuse driver has landed. */ > + val = 0; > + > + calib = tegra124_pad_calibration[val & FUSE_SATA_CALIB_MASK]; > + > + writel(BIT(0), tegra->sata_regs + SCFG_OFFSET + T_SATA0_INDEX); > + > + val = readl(tegra->sata_regs + > + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL1_GEN1); > + val &= ~T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_MASK; > + val &= ~T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_MASK; > + val |= calib.gen1_tx_amp << > + T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_SHIFT; > + val |= calib.gen1_tx_peak << > + T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_SHIFT; > + writel(val, tegra->sata_regs + SCFG_OFFSET + > + T_SATA0_CHX_PHY_CTRL1_GEN1); > + > + val = readl(tegra->sata_regs + > + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL1_GEN2); > + val &= ~T_SATA0_CHX_PHY_CTRL1_GEN2_TX_AMP_MASK; > + val &= ~T_SATA0_CHX_PHY_CTRL1_GEN2_TX_PEAK_MASK; > + val |= calib.gen2_tx_amp << > + T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_SHIFT; > + val |= calib.gen2_tx_peak << > + T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_SHIFT; > + writel(val, tegra->sata_regs + SCFG_OFFSET + > + T_SATA0_CHX_PHY_CTRL1_GEN2); > + > + writel(T_SATA0_CHX_PHY_CTRL11_GEN2_RX_EQ, > + tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL11); > + writel(T_SATA0_CHX_PHY_CTRL2_CDR_CNTL_GEN1, > + tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL2); > + > + writel(0, tegra->sata_regs + SCFG_OFFSET + T_SATA0_INDEX); > + > + /* Program controller device ID */ > + > + val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA); > + val |= T_SATA0_CFG_SATA_BACKDOOR_PROG_IF_EN; > + writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA); > + > + writel(0x01060100, tegra->sata_regs + SCFG_OFFSET + T_SATA0_BKDOOR_CC); > + > + val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA); > + val &= ~T_SATA0_CFG_SATA_BACKDOOR_PROG_IF_EN; > + writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA); > + > + /* Enable IO & memory access, bus master mode */ > + > + val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_1); > + val |= T_SATA0_CFG_1_IO_SPACE | T_SATA0_CFG_1_MEMORY_SPACE | > + T_SATA0_CFG_1_BUS_MASTER | T_SATA0_CFG_1_SERR; > + writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_1); > + > + /* Program SATA MMIO */ > + > + writel(0x10000 << SATA_FPCI_BAR5_START_SHIFT, > + tegra->sata_regs + SATA_FPCI_BAR5); > + > + writel(0x08000 << T_SATA0_CFG_9_BASE_ADDRESS_SHIFT, > + tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_9); > + > + /* Unmask SATA interrupts */ > + > + val = readl(tegra->sata_regs + SATA_INTR_MASK); > + val |= SATA_INTR_MASK_IP_INT_MASK; > + writel(val, tegra->sata_regs + SATA_INTR_MASK); > + > + return 0; > +} > + > +static void tegra_ahci_controller_deinit(struct ahci_host_priv *hpriv) > +{ > + tegra_ahci_power_off(hpriv); > +} > + > +static void tegra_ahci_host_stop(struct ata_host *host) > +{ > + struct ahci_host_priv *hpriv = host->private_data; > + > + tegra_ahci_controller_deinit(hpriv); > +} > + > +static struct ata_port_operations ahci_tegra_port_ops = { > + .inherits = &ahci_ops, > + .host_stop = tegra_ahci_host_stop, > +}; > + > +static const struct ata_port_info ahci_tegra_port_info = { > + .flags = AHCI_FLAG_COMMON, > + .pio_mask = ATA_PIO4, > + .udma_mask = ATA_UDMA6, > + .port_ops = &ahci_tegra_port_ops, > +}; > + > +static const struct of_device_id tegra_ahci_of_match[] = { > + { .compatible = "nvidia,tegra124-ahci" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, tegra_ahci_of_match); > + > +static int tegra_ahci_probe(struct platform_device *pdev) > +{ > + struct ahci_host_priv *hpriv; > + struct tegra_ahci_priv *tegra; > + struct resource *res; > + int ret; > + > + hpriv = ahci_platform_get_resources(pdev); > + if (IS_ERR(hpriv)) > + return PTR_ERR(hpriv); > + > + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); > + if (!tegra) > + return -ENOMEM; > + > + hpriv->plat_data = tegra; > + > + tegra->pdev = pdev; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); > + tegra->sata_regs = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(tegra->sata_regs)) > + return PTR_ERR(tegra->sata_regs); > + > + tegra->sata_rst = devm_reset_control_get(&pdev->dev, "sata"); > + if (IS_ERR(tegra->sata_rst)) { > + dev_err(&pdev->dev, "Failed to get sata reset\n"); > + return PTR_ERR(tegra->sata_rst); > + } > + > + tegra->sata_oob_rst = devm_reset_control_get(&pdev->dev, "sata-oob"); > + if (IS_ERR(tegra->sata_oob_rst)) { > + dev_err(&pdev->dev, "Failed to get sata-oob reset\n"); > + return PTR_ERR(tegra->sata_oob_rst); > + } > + > + tegra->sata_cold_rst = devm_reset_control_get(&pdev->dev, "sata-cold"); > + if (IS_ERR(tegra->sata_cold_rst)) { > + dev_err(&pdev->dev, "Failed to get sata-cold reset\n"); > + return PTR_ERR(tegra->sata_cold_rst); > + } > + > + if (!hpriv->clks[AHCI_CLK_PLL_E]) > + return -EPROBE_DEFER; > + > + tegra->supplies[0].supply = "avdd"; > + tegra->supplies[1].supply = "hvdd"; > + tegra->supplies[2].supply = "vddio"; > + tegra->supplies[3].supply = "target-5v"; > + tegra->supplies[4].supply = "target-12v"; > + > + ret = devm_regulator_bulk_get(&pdev->dev, ARRAY_SIZE(tegra->supplies), > + tegra->supplies); > + if (ret) { > + dev_err(&pdev->dev, "Failed to get regulators\n"); > + return ret; > + } > + > + ret = phy_init(hpriv->phy); > + if (ret) > + return ret; > + > + ret = tegra_ahci_controller_init(hpriv); > + if (ret) > + goto exit_phy; > + > + ret = ahci_platform_init_host(pdev, hpriv, &ahci_tegra_port_info, > + 0, 0, 0); > + if (ret) > + goto deinit_controller; > + > + return 0; > + > +deinit_controller: > + tegra_ahci_controller_deinit(hpriv); > + > +exit_phy: > + phy_exit(hpriv->phy); > + > + return ret; > +}; > + > +static struct platform_driver tegra_ahci_driver = { > + .probe = tegra_ahci_probe, > + .remove = ata_platform_remove_one, > + .driver = { > + .name = "tegra-ahci", > + .of_match_table = tegra_ahci_of_match, > + }, > + /* LP0 suspend support not implemented */ > +}; > +module_platform_driver(tegra_ahci_driver); > + > +MODULE_AUTHOR("Mikko Perttunen "); > +MODULE_DESCRIPTION("Tegra124 AHCI SATA driver"); > +MODULE_LICENSE("GPL v2"); > Thanks & Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/