From patchwork Fri Feb 14 11:23:56 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 24627 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-yh0-f70.google.com (mail-yh0-f70.google.com [209.85.213.70]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 67ED2202B2 for ; Fri, 14 Feb 2014 11:24:32 +0000 (UTC) Received: by mail-yh0-f70.google.com with SMTP id c41sf27083805yho.9 for ; Fri, 14 Feb 2014 03:24:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-unsubscribe; bh=H26hBwVjfzl3RUGCp825iuDI4P1NrVyt32lakYwURHM=; b=WqI3lzesjRb6hZ4odf1RRIyvt/h4gQGqXGcW4lFUDLaLr8gQN1lJhX5AHfpn9sG0vL U22acdOaagVjOPa3kjRYhiFAsvtV+CSf3yTeF2p/Q2v1ni3td5BQBJqXNz0/X01qZI4y BmJW/tJ2XORtJJkapQR1S7F8quBj7ao4QvVWx5dAOPdehxyfG/cSTuELcWOoZrYvgYMZ mayxSB3DZUy5FE1Ppu/ZPPrDDLT1c+zvjCCTx+O7lbGbj1COZvckOhcbkfOZmaUn7gqm Jzbu+xA2j6Bh2PdIfsGZCEVrzRP1Y2GxQnCoCaPlzpI9vBUM77b7C4xTAOKyrXCi+/Go 4FRg== X-Gm-Message-State: ALoCoQkgn8V/DUMCY1ol2uPwYtgux5C17ilcnNsonzHoH5LJzPK2ReFyF9FEGaTDU7zKRCbQrpak X-Received: by 10.236.179.172 with SMTP id h32mr2277788yhm.16.1392377071414; Fri, 14 Feb 2014 03:24:31 -0800 (PST) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.140.108.135 with SMTP id j7ls40450qgf.88.gmail; Fri, 14 Feb 2014 03:24:31 -0800 (PST) X-Received: by 10.220.139.198 with SMTP id f6mr280444vcu.47.1392377071322; Fri, 14 Feb 2014 03:24:31 -0800 (PST) Received: from mail-ve0-f178.google.com (mail-ve0-f178.google.com [209.85.128.178]) by mx.google.com with ESMTPS id fb12si1812734veb.52.2014.02.14.03.24.31 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 14 Feb 2014 03:24:31 -0800 (PST) Received-SPF: neutral (google.com: 209.85.128.178 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.128.178; Received: by mail-ve0-f178.google.com with SMTP id oy12so9459795veb.23 for ; Fri, 14 Feb 2014 03:24:31 -0800 (PST) X-Received: by 10.220.131.210 with SMTP id y18mr5146861vcs.12.1392377071132; Fri, 14 Feb 2014 03:24:31 -0800 (PST) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.220.174.196 with SMTP id u4csp101107vcz; Fri, 14 Feb 2014 03:24:30 -0800 (PST) X-Received: by 10.194.92.164 with SMTP id cn4mr842615wjb.74.1392377057958; Fri, 14 Feb 2014 03:24:17 -0800 (PST) Received: from mail-we0-f170.google.com (mail-we0-f170.google.com [74.125.82.170]) by mx.google.com with ESMTPS id ez4si3483802wjd.25.2014.02.14.03.24.17 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 14 Feb 2014 03:24:17 -0800 (PST) Received-SPF: neutral (google.com: 74.125.82.170 is neither permitted nor denied by best guess record for domain of lee.jones@linaro.org) client-ip=74.125.82.170; Received: by mail-we0-f170.google.com with SMTP id w62so8743681wes.15 for ; Fri, 14 Feb 2014 03:24:17 -0800 (PST) X-Received: by 10.180.10.105 with SMTP id h9mr1772070wib.11.1392377057263; Fri, 14 Feb 2014 03:24:17 -0800 (PST) Received: from localhost.localdomain ([80.76.198.141]) by mx.google.com with ESMTPSA id gt6sm3601775wib.8.2014.02.14.03.24.14 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 14 Feb 2014 03:24:16 -0800 (PST) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: alexandre.torgue@st.com, Lee Jones , Kishon Vijay Abraham I Subject: [PATCH 4/4] phy: miphy365x: Provide support for the MiPHY356x Generic PHY Date: Fri, 14 Feb 2014 11:23:56 +0000 Message-Id: <1392377036-12816-4-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1392377036-12816-1-git-send-email-lee.jones@linaro.org> References: <1392377036-12816-1-git-send-email-lee.jones@linaro.org> X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: lee.jones@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.128.178 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , The MiPHY365x is a Generic PHY which can serve various SATA or PCIe devices. It has 2 ports which it can use for either; both SATA, both PCIe or one of each in any configuration. Cc: Kishon Vijay Abraham I Signed-off-by: Lee Jones Acked-by: Mark Rutland --- drivers/phy/Kconfig | 10 + drivers/phy/Makefile | 1 + drivers/phy/phy-miphy365x.c | 614 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 625 insertions(+) create mode 100644 drivers/phy/phy-miphy365x.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 330ef2d..55d94cb 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -21,6 +21,16 @@ config PHY_EXYNOS_MIPI_VIDEO Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P and EXYNOS SoCs. +config PHY_MIPHY365X + tristate "STMicroelectronics MIPHY365X PHY driver for STiH41x series" + depends on ARCH_STI + depends on GENERIC_PHY + depends on HAS_IOMEM + depends on OF + help + Enable this to support the miphy transceiver (for SATA/PCIE) + that is part of STMicroelectronics STiH41x SoC series. + config OMAP_USB2 tristate "OMAP USB2 PHY Driver" depends on ARCH_OMAP2PLUS diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index d0caae9..5879639 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -5,5 +5,6 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o +obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c new file mode 100644 index 0000000..ac1e43d --- /dev/null +++ b/drivers/phy/phy-miphy365x.c @@ -0,0 +1,614 @@ +/* + * Copyright (C) 2014 STMicroelectronics + * + * STMicroelectronics PHY driver MiPHY365 (for SoC STiH416). + * + * Author: Alexandre Torgue + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define HFC_TIMEOUT 50 + +#define SYSCFG_2521 0x824 +#define SYSCFG_2522 0x828 +#define SYSCFG_PCIE_SATA_MASK BIT(1) +#define SYSCFG_PCIE_SATA_POS 1 + +/* MiPHY365x register definitiona */ +#define RESET_REG 0x00 +#define RST_PLL BIT(1) +#define RST_PLL_CAL BIT(2) +#define RST_RX BIT(4) +#define RST_MACRO BIT(7) + +#define STATUS_REG 0x01 +#define IDLL_RDY BIT(0) +#define PLL_RDY BIT(1) +#define DES_BIT_LOCK BIT(2) +#define DES_SYMBOL_LOCK BIT(3) + +#define CTRL_REG 0x02 +#define TERM_EN BIT(0) +#define PCI_EN BIT(2) +#define DES_BIT_LOCK_EN BIT(3) +#define TX_POL BIT(5) + +#define INT_CTRL_REG 0x03 + +#define BOUNDARY1_REG 0x10 +#define SPDSEL_SEL BIT(0) + +#define BOUNDARY3_REG 0x12 +#define TX_SPDSEL_GEN1_VAL 0 +#define TX_SPDSEL_GEN2_VAL 0x01 +#define TX_SPDSEL_GEN3_VAL 0x02 +#define RX_SPDSEL_GEN1_VAL 0 +#define RX_SPDSEL_GEN2_VAL (0x01 << 3) +#define RX_SPDSEL_GEN3_VAL (0x02 << 3) + +#define PCIE_REG 0x16 + +#define BUF_SEL_REG 0x20 +#define CONF_GEN_SEL_GEN3 0x02 +#define CONF_GEN_SEL_GEN2 0x01 +#define PD_VDDTFILTER BIT(4) + +#define TXBUF1_REG 0x21 +#define SWING_VAL 0x04 +#define SWING_VAL_GEN1 0x03 +#define PREEMPH_VAL (0x3 << 5) + +#define TXBUF2_REG 0x22 +#define TXSLEW_VAL 0x2 +#define TXSLEW_VAL_GEN1 0x4 + +#define RXBUF_OFFSET_CTRL_REG 0x23 + +#define RXBUF_REG 0x25 +#define SDTHRES_VAL 0x01 +#define EQ_ON3 (0x03 << 4) +#define EQ_ON1 (0x01 << 4) + +#define COMP_CTRL1_REG 0x40 +#define START_COMSR BIT(0) +#define START_COMZC BIT(1) +#define COMSR_DONE BIT(2) +#define COMZC_DONE BIT(3) +#define COMP_AUTO_LOAD BIT(4) + +#define COMP_CTRL2_REG 0x41 +#define COMP_2MHZ_RAT_GEN1 0x1e +#define COMP_2MHZ_RAT 0xf + +#define COMP_CTRL3_REG 0x42 +#define COMSR_COMP_REF 0x33 + +#define COMP_IDLL_REG 0x47 +#define COMZC_IDLL 0x2a + +#define PLL_CTRL1_REG 0x50 +#define PLL_START_CAL BIT(0) +#define BUF_EN BIT(2) +#define SYNCHRO_TX BIT(3) +#define SSC_EN BIT(6) +#define CONFIG_PLL BIT(7) + +#define PLL_CTRL2_REG 0x51 +#define BYPASS_PLL_CAL BIT(1) + +#define PLL_RAT_REG 0x52 + +#define PLL_SSC_STEP_MSB_REG 0x56 +#define PLL_SSC_STEP_MSB_VAL 0x03 + +#define PLL_SSC_STEP_LSB_REG 0x57 +#define PLL_SSC_STEP_LSB_VAL 0x63 + +#define PLL_SSC_PER_MSB_REG 0x58 +#define PLL_SSC_PER_MSB_VAL 0 + +#define PLL_SSC_PER_LSB_REG 0x59 +#define PLL_SSC_PER_LSB_VAL 0xf1 + +#define IDLL_TEST_REG 0x72 +#define START_CLK_HF BIT(6) + +#define DES_BITLOCK_REG 0x86 +#define BIT_LOCK_LEVEL 0x01 +#define BIT_LOCK_CNT_512 (0x03 << 5) + +static u8 ports[] = { MIPHY_PORT_0, MIPHY_PORT_1 }; + +struct miphy365x_phy { + struct phy *phy; + void __iomem *base; + void __iomem *sata; + void __iomem *pcie; + u8 type; + u8 port; +}; + +struct miphy365x_dev { + struct device *dev; + struct mutex miphy_mutex; + struct miphy365x_phy phys[ARRAY_SIZE(ports)]; + bool pcie_tx_pol_inv; + bool sata_tx_pol_inv; + u32 sata_gen; + struct regmap *regmap; +}; + +enum miphy_sata_gen { + SATA_GEN1 = 1, + SATA_GEN2, + SATA_GEN3 +}; + +static u8 rx_tx_spd[] = { + TX_SPDSEL_GEN1_VAL | RX_SPDSEL_GEN1_VAL, + TX_SPDSEL_GEN2_VAL | RX_SPDSEL_GEN2_VAL, + TX_SPDSEL_GEN3_VAL | RX_SPDSEL_GEN3_VAL +}; + +#define miphy365x_phy_to_dev(inst) \ + container_of((inst), struct miphy365x_dev, phys[(inst)->port]); + +/* + * This function selects the system configuration, + * either two SATA, one SATA and one PCIe, or two PCIe lanes. + */ +static int miphy365x_set_path(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 config = miphy_phy->type | miphy_phy->port; + u32 mask = SYSCFG_PCIE_SATA_MASK; + u32 reg; + bool sata; + + switch (config) { + case MIPHY_SATA_PORT0: + reg = SYSCFG_2521; + sata = true; + break; + case MIPHY_PCIE_PORT1: + reg = SYSCFG_2522; + sata = false; + break; + default: + dev_err(miphy_dev->dev, "Configuration not supported\n"); + return -EINVAL; + } + + return regmap_update_bits(miphy_dev->regmap, reg, mask, + sata << SYSCFG_PCIE_SATA_POS); +} + +static void miphy365x_phy_init_pcie_port(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 val; + + if (!miphy_dev->pcie_tx_pol_inv) + return; + + /* Invert Tx polarity and clear pci_txdetect_pol bit */ + val = TERM_EN | PCI_EN | DES_BIT_LOCK_EN | TX_POL; + writeb_relaxed(val, miphy_phy->base + CTRL_REG); + writeb_relaxed(0x00, miphy_phy->base + PCIE_REG); +} + +static inline int miphy365x_phy_hfc_not_rdy(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + int timeout = HFC_TIMEOUT; + u8 mask = IDLL_RDY | PLL_RDY; + u8 regval; + + do { + regval = readb_relaxed(miphy_phy->base + STATUS_REG); + usleep_range(2000, 2500); + } while (timeout-- && (regval & mask)); + + if (timeout < 0) { + dev_err(miphy_dev->dev, "HFC ready timeout!\n"); + return -EBUSY; + } + + return 0; +} + +static inline int miphy365x_phy_rdy(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + int timeout = HFC_TIMEOUT; + u8 mask = IDLL_RDY | PLL_RDY; + u8 regval; + + do { + regval = readb_relaxed(miphy_phy->base + STATUS_REG); + usleep_range(2000, 2500); + } while (timeout-- && ((regval & mask) != mask)); + + if (timeout < 0) { + dev_err(miphy_dev->dev, "PHY not ready timeout!\n"); + return -EBUSY; + } + + return 0; +} + +static inline void miphy365x_phy_set_comp(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 val, mask; + + if (miphy_dev->sata_gen == SATA_GEN1) + writeb_relaxed(COMP_2MHZ_RAT_GEN1, + miphy_phy->base + COMP_CTRL2_REG); + else + writeb_relaxed(COMP_2MHZ_RAT, + miphy_phy->base + COMP_CTRL2_REG); + + if (miphy_dev->sata_gen != SATA_GEN3) { + writeb_relaxed(COMSR_COMP_REF, + miphy_phy->base + COMP_CTRL3_REG); + /* + * Force VCO current to value defined by address 0x5A + * and disable PCIe100Mref bit + * Enable auto load compensation for pll_i_bias + */ + writeb_relaxed(BYPASS_PLL_CAL, miphy_phy->base + PLL_CTRL2_REG); + writeb_relaxed(COMZC_IDLL, miphy_phy->base + COMP_IDLL_REG); + } + + /* + * Force restart compensation and enable auto load + * for Comzc_Tx, Comzc_Rx and Comsr on macro + */ + val = START_COMSR | START_COMZC | COMP_AUTO_LOAD; + writeb_relaxed(val, miphy_phy->base + COMP_CTRL1_REG); + + mask = COMSR_DONE | COMZC_DONE; + while ((readb_relaxed(miphy_phy->base + COMP_CTRL1_REG) & mask) != mask) + cpu_relax(); +} + +static inline void miphy365x_phy_set_ssc(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 val; + + /* + * SSC Settings. SSC will be enabled through Link + * SSC Ampl. = 0.4% + * SSC Freq = 31KHz + */ + writeb_relaxed(PLL_SSC_STEP_MSB_VAL, + miphy_phy->base + PLL_SSC_STEP_MSB_REG); + writeb_relaxed(PLL_SSC_STEP_LSB_VAL, + miphy_phy->base + PLL_SSC_STEP_LSB_REG); + writeb_relaxed(PLL_SSC_PER_MSB_VAL, + miphy_phy->base + PLL_SSC_PER_MSB_REG); + writeb_relaxed(PLL_SSC_PER_LSB_VAL, + miphy_phy->base + PLL_SSC_PER_LSB_REG); + + /* SSC Settings complete */ + if (miphy_dev->sata_gen == SATA_GEN1) { + val = PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL; + writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG); + } else { + val = SSC_EN | PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL; + writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG); + } +} + +static int miphy365x_phy_init_sata_port(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + int ret; + u8 val; + + /* + * Force PHY macro reset, PLL calibration reset, PLL reset + * and assert Deserializer Reset + */ + val = RST_PLL | RST_PLL_CAL | RST_RX | RST_MACRO; + writeb_relaxed(val, miphy_phy->base + RESET_REG); + + if (miphy_dev->sata_tx_pol_inv) + writeb_relaxed(TX_POL, miphy_phy->base + CTRL_REG); + + /* + * Force macro1 to use rx_lspd, tx_lspd + * Force Rx_Clock on first I-DLL phase + * Force Des in HP mode on macro, rx_lspd, tx_lspd for Gen2/3 + */ + writeb_relaxed(SPDSEL_SEL, miphy_phy->base + BOUNDARY1_REG); + writeb_relaxed(START_CLK_HF, miphy_phy->base + IDLL_TEST_REG); + val = rx_tx_spd[miphy_dev->sata_gen]; + writeb_relaxed(val, miphy_phy->base + BOUNDARY3_REG); + + /* Wait for HFC_READY = 0 */ + ret = miphy365x_phy_hfc_not_rdy(miphy_phy, miphy_dev); + if (ret) + return ret; + + /* Compensation Recalibration */ + miphy365x_phy_set_comp(miphy_phy, miphy_dev); + + switch (miphy_dev->sata_gen) { + case SATA_GEN3: + /* + * TX Swing target 550-600mv peak to peak diff + * Tx Slew target 90-110ps rising/falling time + * Rx Eq ON3, Sigdet threshold SDTH1 + */ + val = PD_VDDTFILTER | CONF_GEN_SEL_GEN3; + writeb_relaxed(val, miphy_phy->base + BUF_SEL_REG); + val = SWING_VAL | PREEMPH_VAL; + writeb_relaxed(val, miphy_phy->base + TXBUF1_REG); + writeb_relaxed(TXSLEW_VAL, miphy_phy->base + TXBUF2_REG); + writeb_relaxed(0x00, miphy_phy->base + RXBUF_OFFSET_CTRL_REG); + val = SDTHRES_VAL | EQ_ON3; + writeb_relaxed(val, miphy_phy->base + RXBUF_REG); + break; + case SATA_GEN2: + /* + * conf gen sel=0x1 to program Gen2 banked registers + * VDDT filter ON + * Tx Swing target 550-600mV peak-to-peak diff + * Tx Slew target 90-110 ps rising/falling time + * RX Equalization ON1, Sigdet threshold SDTH1 + */ + writeb_relaxed(CONF_GEN_SEL_GEN2, + miphy_phy->base + BUF_SEL_REG); + writeb_relaxed(SWING_VAL, miphy_phy->base + TXBUF1_REG); + writeb_relaxed(TXSLEW_VAL, miphy_phy->base + TXBUF2_REG); + val = SDTHRES_VAL | EQ_ON1; + writeb_relaxed(val, miphy_phy->base + RXBUF_REG); + break; + case SATA_GEN1: + /* + * conf gen sel = 00b to program Gen1 banked registers + * VDDT filter ON + * Tx Swing target 500-550mV peak-to-peak diff + * Tx Slew target120-140 ps rising/falling time + */ + writeb_relaxed(PD_VDDTFILTER, miphy_phy->base + BUF_SEL_REG); + writeb_relaxed(SWING_VAL_GEN1, miphy_phy->base + TXBUF1_REG); + writeb_relaxed(TXSLEW_VAL_GEN1, miphy_phy->base + TXBUF2_REG); + break; + default: + break; + } + + /* Force Macro1 in partial mode & release pll cal reset */ + writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG); + usleep_range(100, 150); + + miphy365x_phy_set_ssc(miphy_phy, miphy_dev); + + /* Wait for phy_ready */ + ret = miphy365x_phy_rdy(miphy_phy, miphy_dev); + if (ret) + return ret; + + /* + * Enable macro1 to use rx_lspd & tx_lspd + * Release Rx_Clock on first I-DLL phase on macro1 + * Assert deserializer reset + * des_bit_lock_en is set + * bit lock detection strength + * Deassert deserializer reset + */ + writeb_relaxed(0x00, miphy_phy->base + BOUNDARY1_REG); + writeb_relaxed(0x00, miphy_phy->base + IDLL_TEST_REG); + writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG); + val = miphy_dev->sata_tx_pol_inv ? + (TX_POL | DES_BIT_LOCK_EN) : DES_BIT_LOCK_EN; + writeb_relaxed(val, miphy_phy->base + CTRL_REG); + + val = BIT_LOCK_CNT_512 | BIT_LOCK_LEVEL; + writeb_relaxed(val, miphy_phy->base + DES_BITLOCK_REG); + writeb_relaxed(0x00, miphy_phy->base + RESET_REG); + + return 0; +} + +static int miphy365x_phy_init(struct phy *phy) +{ + int ret = 0; + struct miphy365x_phy *miphy_phy = phy_get_drvdata(phy); + struct miphy365x_dev *miphy_dev = miphy365x_phy_to_dev(miphy_phy); + + mutex_lock(&miphy_dev->miphy_mutex); + + ret = miphy365x_set_path(miphy_phy, miphy_dev); + if (ret) { + mutex_unlock(&miphy_dev->miphy_mutex); + return ret; + } + + /* Initialise Miphy for PCIe or SATA */ + if (miphy_phy->type == MIPHY_TYPE_PCIE) + miphy365x_phy_init_pcie_port(miphy_phy, miphy_dev); + else + ret = miphy365x_phy_init_sata_port(miphy_phy, miphy_dev); + + mutex_unlock(&miphy_dev->miphy_mutex); + + return ret; +} + +static struct phy *miphy365x_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct miphy365x_dev *state = dev_get_drvdata(dev); + u8 port = args->args[0]; + u8 type = args->args[1]; + + if (WARN_ON(port >= ARRAY_SIZE(ports))) + return ERR_PTR(-EINVAL); + + if (type == MIPHY_TYPE_SATA) + state->phys[port].base = state->phys[port].sata; + else if (type == MIPHY_TYPE_PCIE) + state->phys[port].base = state->phys[port].pcie; + else { + WARN(1, "Invalid type specified in DT"); + return ERR_PTR(-EINVAL); + } + + state->phys[port].type = type; + + return state->phys[port].phy; +} + +static struct phy_ops miphy365x_phy_ops = { + .init = miphy365x_phy_init, + .owner = THIS_MODULE, +}; + +static int miphy365x_phy_get_base_addr(struct platform_device *pdev, + struct miphy365x_phy *phy, u8 port) +{ + struct resource *res; + char type[6]; + + sprintf(type, "sata%d", port); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); + if (!res) + return -ENODEV; + + phy->sata = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!phy->sata) + return -ENOMEM; + + sprintf(type, "pcie%d", port); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); + if (!res) + return -ENODEV; + + phy->pcie = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!phy->pcie) + return -ENOMEM; + + return 0; +} + +static int miphy365x_phy_of_probe(struct device_node *np, + struct miphy365x_dev *phy_dev) +{ + phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(phy_dev->regmap)) { + dev_err(phy_dev->dev, "No syscfg phandle specified\n"); + return PTR_ERR(phy_dev->regmap); + } + + of_property_read_u32(np, "st,sata-gen", &phy_dev->sata_gen); + if (!phy_dev->sata_gen) + phy_dev->sata_gen = SATA_GEN1; + + phy_dev->pcie_tx_pol_inv = + of_property_read_bool(np, "st,pcie-tx-pol-inv"); + + phy_dev->sata_tx_pol_inv = + of_property_read_bool(np, "st,sata-tx-pol-inv"); + + return 0; +} + +static int miphy365x_phy_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct miphy365x_dev *phy_dev; + struct device *dev = &pdev->dev; + struct phy_provider *provider; + u8 port; + int ret; + + if (!np) { + dev_err(dev, "No DT node found\n"); + return -EINVAL; + } + + phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL); + if (!phy_dev) + return -ENOMEM; + + ret = miphy365x_phy_of_probe(np, phy_dev); + if (ret) + return ret; + + phy_dev->dev = dev; + + dev_set_drvdata(dev, phy_dev); + + mutex_init(&phy_dev->miphy_mutex); + + for (port = 0; port < ARRAY_SIZE(ports); port++) { + struct phy *phy; + + phy = devm_phy_create(dev, &miphy365x_phy_ops, NULL); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create PHY on port %d\n", port); + return PTR_ERR(phy); + } + + phy_dev->phys[port].phy = phy; + phy_dev->phys[port].port = port; + + ret = miphy365x_phy_get_base_addr(pdev, + &phy_dev->phys[port], port); + if (ret) + return ret; + + phy_set_drvdata(phy, &phy_dev->phys[port]); + } + + provider = devm_of_phy_provider_register(dev, miphy365x_phy_xlate); + if (IS_ERR(provider)) + return PTR_ERR(provider); + + return 0; +} + +static const struct of_device_id miphy365x_phy_of_match[] = { + { .compatible = "st,miphy365x-phy", }, + { }, +}; +MODULE_DEVICE_TABLE(of, miphy365x_phy_of_match); + +static struct platform_driver miphy365x_phy_driver = { + .probe = miphy365x_phy_probe, + .driver = { + .name = "miphy365x-phy", + .owner = THIS_MODULE, + .of_match_table = miphy365x_phy_of_match, + } +}; +module_platform_driver(miphy365x_phy_driver); + +MODULE_AUTHOR("Alexandre Torgue "); +MODULE_DESCRIPTION("STMicroelectronics miphy365x driver"); +MODULE_LICENSE("GPL v2");