// SPDX-License-Identifier: GPL-2.0-only /* * Cortina Systems Gemini SATA bridge add-on to Faraday FTIDE010 * Copyright (C) 2017 Linus Walleij <[email protected]> */ #include <linux/init.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/bitops.h> #include <linux/mfd/syscon.h> #include <linux/regmap.h> #include <linux/delay.h> #include <linux/reset.h> #include <linux/of.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/pinctrl/consumer.h> #include "sata_gemini.h" #define DRV_NAME … /** * struct sata_gemini - a state container for a Gemini SATA bridge * @dev: the containing device * @base: remapped I/O memory base * @muxmode: the current muxing mode * @ide_pins: if the device is using the plain IDE interface pins * @sata_bridge: if the device enables the SATA bridge * @sata0_reset: SATA0 reset handler * @sata1_reset: SATA1 reset handler * @sata0_pclk: SATA0 PCLK handler * @sata1_pclk: SATA1 PCLK handler */ struct sata_gemini { … }; /* Miscellaneous Control Register */ #define GEMINI_GLOBAL_MISC_CTRL … /* * Values of IDE IOMUX bits in the misc control register * * Bits 26:24 are "IDE IO Select", which decides what SATA * adapters are connected to which of the two IDE/ATA * controllers in the Gemini. We can connect the two IDE blocks * to one SATA adapter each, both acting as master, or one IDE * blocks to two SATA adapters so the IDE block can act in a * master/slave configuration. * * We also bring out different blocks on the actual IDE * pins (not SATA pins) if (and only if) these are muxed in. * * 111-100 - Reserved * Mode 0: 000 - ata0 master <-> sata0 * ata1 master <-> sata1 * ata0 slave interface brought out on IDE pads * Mode 1: 001 - ata0 master <-> sata0 * ata1 master <-> sata1 * ata1 slave interface brought out on IDE pads * Mode 2: 010 - ata1 master <-> sata1 * ata1 slave <-> sata0 * ata0 master and slave interfaces brought out * on IDE pads * Mode 3: 011 - ata0 master <-> sata0 * ata1 slave <-> sata1 * ata1 master and slave interfaces brought out * on IDE pads */ #define GEMINI_IDE_IOMUX_MASK … #define GEMINI_IDE_IOMUX_MODE0 … #define GEMINI_IDE_IOMUX_MODE1 … #define GEMINI_IDE_IOMUX_MODE2 … #define GEMINI_IDE_IOMUX_MODE3 … #define GEMINI_IDE_IOMUX_SHIFT … /* * Registers directly controlling the PATA<->SATA adapters */ #define GEMINI_SATA_ID … #define GEMINI_SATA_PHY_ID … #define GEMINI_SATA0_STATUS … #define GEMINI_SATA1_STATUS … #define GEMINI_SATA0_CTRL … #define GEMINI_SATA1_CTRL … #define GEMINI_SATA_STATUS_BIST_DONE … #define GEMINI_SATA_STATUS_BIST_OK … #define GEMINI_SATA_STATUS_PHY_READY … #define GEMINI_SATA_CTRL_PHY_BIST_EN … #define GEMINI_SATA_CTRL_PHY_FORCE_IDLE … #define GEMINI_SATA_CTRL_PHY_FORCE_READY … #define GEMINI_SATA_CTRL_PHY_AFE_LOOP_EN … #define GEMINI_SATA_CTRL_PHY_DIG_LOOP_EN … #define GEMINI_SATA_CTRL_HOTPLUG_DETECT_EN … #define GEMINI_SATA_CTRL_ATAPI_EN … #define GEMINI_SATA_CTRL_BUS_WITH_20 … #define GEMINI_SATA_CTRL_SLAVE_EN … #define GEMINI_SATA_CTRL_EN … /* * There is only ever one instance of this bridge on a system, * so create a singleton so that the FTIDE010 instances can grab * a reference to it. */ static struct sata_gemini *sg_singleton; struct sata_gemini *gemini_sata_bridge_get(void) { … } EXPORT_SYMBOL(…); bool gemini_sata_bridge_enabled(struct sata_gemini *sg, bool is_ata1) { … } EXPORT_SYMBOL(…); enum gemini_muxmode gemini_sata_get_muxmode(struct sata_gemini *sg) { … } EXPORT_SYMBOL(…); static int gemini_sata_setup_bridge(struct sata_gemini *sg, unsigned int bridge) { … } int gemini_sata_start_bridge(struct sata_gemini *sg, unsigned int bridge) { … } EXPORT_SYMBOL(…); void gemini_sata_stop_bridge(struct sata_gemini *sg, unsigned int bridge) { … } EXPORT_SYMBOL(…); int gemini_sata_reset_bridge(struct sata_gemini *sg, unsigned int bridge) { … } EXPORT_SYMBOL(…); static int gemini_sata_bridge_init(struct sata_gemini *sg) { … } static int gemini_setup_ide_pins(struct device *dev) { … } static int gemini_sata_probe(struct platform_device *pdev) { … } static void gemini_sata_remove(struct platform_device *pdev) { … } static const struct of_device_id gemini_sata_of_match[] = …; static struct platform_driver gemini_sata_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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