// SPDX-License-Identifier: GPL-2.0-or-later /* * drivers/ata/sata_dwc_460ex.c * * Synopsys DesignWare Cores (DWC) SATA host driver * * Author: Mark Miesfeld <[email protected]> * * Ported from 2.6.19.2 to 2.6.25/26 by Stefan Roese <[email protected]> * Copyright 2008 DENX Software Engineering * * Based on versions provided by AMCC and Synopsys which are: * Copyright 2006 Applied Micro Circuits Corporation * COPYRIGHT (C) 2005 SYNOPSYS, INC. ALL RIGHTS RESERVED */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/device.h> #include <linux/dmaengine.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/platform_device.h> #include <linux/phy/phy.h> #include <linux/libata.h> #include <linux/slab.h> #include <trace/events/libata.h> #include "libata.h" #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> /* These two are defined in "libata.h" */ #undef DRV_NAME #undef DRV_VERSION #define DRV_NAME … #define DRV_VERSION … #define sata_dwc_writel(a, v) … #define sata_dwc_readl(a) … #define AHB_DMA_BRST_DFLT … enum { … }; /* DWC SATA Registers */ struct sata_dwc_regs { … }; enum { … }; #define SATA_DWC_SCR0_SPD_GET(v) … #define SATA_DWC_DMACR_TX_CLEAR(v) … #define SATA_DWC_DMACR_RX_CLEAR(v) … #define SATA_DWC_DBTSR_MWR(size) … #define SATA_DWC_DBTSR_MRD(size) … struct sata_dwc_device { … }; /* * Allow one extra special slot for commands and DMA management * to account for libata internal commands. */ #define SATA_DWC_QCMD_MAX … struct sata_dwc_device_port { … }; /* * Commonly used DWC SATA driver macros */ #define HSDEV_FROM_HOST(host) … #define HSDEV_FROM_AP(ap) … #define HSDEVP_FROM_AP(ap) … #define HSDEV_FROM_QC(qc) … #define HSDEV_FROM_HSDEVP(p) … enum { … }; /* * Prototypes */ static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag); static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc); static void sata_dwc_dma_xfer_complete(struct ata_port *ap); static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag); #ifdef CONFIG_SATA_DWC_OLD_DMA #include <linux/platform_data/dma-dw.h> #include <linux/dma/dw.h> static struct dw_dma_slave sata_dwc_dma_dws = …; static bool sata_dwc_dma_filter(struct dma_chan *chan, void *param) { … } static int sata_dwc_dma_get_channel_old(struct sata_dwc_device_port *hsdevp) { … } static int sata_dwc_dma_init_old(struct platform_device *pdev, struct sata_dwc_device *hsdev) { … } static void sata_dwc_dma_exit_old(struct sata_dwc_device *hsdev) { … } #endif static const char *get_prot_descript(u8 protocol) { … } static void dma_dwc_xfer_done(void *hsdev_instance) { … } static struct dma_async_tx_descriptor *dma_dwc_xfer_setup(struct ata_queued_cmd *qc) { … } static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val) { … } static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val) { … } static void clear_serror(struct ata_port *ap) { … } static void clear_interrupt_bit(struct sata_dwc_device *hsdev, u32 bit) { … } static u32 qcmd_tag_to_mask(u8 tag) { … } /* See ahci.c */ static void sata_dwc_error_intr(struct ata_port *ap, struct sata_dwc_device *hsdev, uint intpr) { … } /* * Function : sata_dwc_isr * arguments : irq, void *dev_instance, struct pt_regs *regs * Return value : irqreturn_t - status of IRQ * This Interrupt handler called via port ops registered function. * .irq_handler = sata_dwc_isr */ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance) { … } static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag) { … } static void sata_dwc_dma_xfer_complete(struct ata_port *ap) { … } static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc) { … } static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev) { … } static void sata_dwc_setup_port(struct ata_ioports *port, void __iomem *base) { … } static int sata_dwc_dma_get_channel(struct sata_dwc_device_port *hsdevp) { … } /* * Function : sata_dwc_port_start * arguments : struct ata_ioports *port * Return value : returns 0 if success, error code otherwise * This function allocates the scatter gather LLI table for AHB DMA */ static int sata_dwc_port_start(struct ata_port *ap) { … } static void sata_dwc_port_stop(struct ata_port *ap) { … } /* * Function : sata_dwc_exec_command_by_tag * arguments : ata_port *ap, ata_taskfile *tf, u8 tag, u32 cmd_issued * Return value : None * This function keeps track of individual command tag ids and calls * ata_exec_command in libata */ static void sata_dwc_exec_command_by_tag(struct ata_port *ap, struct ata_taskfile *tf, u8 tag, u32 cmd_issued) { … } static void sata_dwc_bmdma_setup_by_tag(struct ata_queued_cmd *qc, u8 tag) { … } static void sata_dwc_bmdma_setup(struct ata_queued_cmd *qc) { … } static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag) { … } static void sata_dwc_bmdma_start(struct ata_queued_cmd *qc) { … } static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc) { … } static void sata_dwc_error_handler(struct ata_port *ap) { … } static int sata_dwc_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { … } static void sata_dwc_dev_select(struct ata_port *ap, unsigned int device) { … } /* * scsi mid-layer and libata interface structures */ static const struct scsi_host_template sata_dwc_sht = …; static struct ata_port_operations sata_dwc_ops = …; static const struct ata_port_info sata_dwc_port_info[] = …; static int sata_dwc_probe(struct platform_device *ofdev) { … } static void sata_dwc_remove(struct platform_device *ofdev) { … } static const struct of_device_id sata_dwc_match[] = …; MODULE_DEVICE_TABLE(of, sata_dwc_match); static struct platform_driver sata_dwc_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_VERSION(…);
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