![Tejun Heo](/assets/img/avatar_default.png)
Make the following changes to prepare for NCQ command completion update. Changes made by this patch don't cause any functional difference. * sata_fsl_host_intr(): rename the local variable qc_active to done_mask as that's what it is. * mv_process_crpb_response(): restructure if clause for easier update. * nv_adma_interrupt(): drop unnecessary error variable. * nv_swncq_sdbfis(): drop unnecessary nr_done and return 0 on success. Typo fix. * nv_swncq_dmafis(): drop unused return value and return void. * nv_swncq_host_interrupt(): drop unnecessary return value handling. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ashish Kalra <ashish.kalra@freescale.com> Cc: Saeed Bishara <saeed@marvell.com> Cc: Mark Lord <liml@rtr.ca> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
1461 lines
37 KiB
C
1461 lines
37 KiB
C
/*
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* drivers/ata/sata_fsl.c
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*
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* Freescale 3.0Gbps SATA device driver
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*
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* Author: Ashish Kalra <ashish.kalra@freescale.com>
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* Li Yang <leoli@freescale.com>
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*
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* Copyright (c) 2006-2007 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_cmnd.h>
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#include <linux/libata.h>
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#include <asm/io.h>
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#include <linux/of_platform.h>
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/* Controller information */
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enum {
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SATA_FSL_QUEUE_DEPTH = 16,
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SATA_FSL_MAX_PRD = 63,
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SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
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SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
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SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
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ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
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ATA_FLAG_PMP | ATA_FLAG_NCQ | ATA_FLAG_AN),
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SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
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SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
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SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
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/*
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* SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
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* chained indirect PRDEs upto a max count of 63.
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* We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will
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* be setup as an indirect descriptor, pointing to it's next
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* (contiguous) PRDE. Though chained indirect PRDE arrays are
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* supported,it will be more efficient to use a direct PRDT and
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* a single chain/link to indirect PRDE array/PRDT.
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*/
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SATA_FSL_CMD_DESC_CFIS_SZ = 32,
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SATA_FSL_CMD_DESC_SFIS_SZ = 32,
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SATA_FSL_CMD_DESC_ACMD_SZ = 16,
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SATA_FSL_CMD_DESC_RSRVD = 16,
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SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
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SATA_FSL_CMD_DESC_SFIS_SZ +
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SATA_FSL_CMD_DESC_ACMD_SZ +
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SATA_FSL_CMD_DESC_RSRVD +
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SATA_FSL_MAX_PRD * 16),
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SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
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(SATA_FSL_CMD_DESC_CFIS_SZ +
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SATA_FSL_CMD_DESC_SFIS_SZ +
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SATA_FSL_CMD_DESC_ACMD_SZ +
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SATA_FSL_CMD_DESC_RSRVD),
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SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
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SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
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SATA_FSL_CMD_DESC_AR_SZ),
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/*
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* MPC8315 has two SATA controllers, SATA1 & SATA2
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* (one port per controller)
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* MPC837x has 2/4 controllers, one port per controller
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*/
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SATA_FSL_MAX_PORTS = 1,
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SATA_FSL_IRQ_FLAG = IRQF_SHARED,
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};
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/*
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* Host Controller command register set - per port
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*/
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enum {
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CQ = 0,
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CA = 8,
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CC = 0x10,
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CE = 0x18,
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DE = 0x20,
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CHBA = 0x24,
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HSTATUS = 0x28,
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HCONTROL = 0x2C,
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CQPMP = 0x30,
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SIGNATURE = 0x34,
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ICC = 0x38,
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/*
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* Host Status Register (HStatus) bitdefs
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*/
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ONLINE = (1 << 31),
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GOING_OFFLINE = (1 << 30),
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BIST_ERR = (1 << 29),
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FATAL_ERR_HC_MASTER_ERR = (1 << 18),
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FATAL_ERR_PARITY_ERR_TX = (1 << 17),
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FATAL_ERR_PARITY_ERR_RX = (1 << 16),
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FATAL_ERR_DATA_UNDERRUN = (1 << 13),
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FATAL_ERR_DATA_OVERRUN = (1 << 12),
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FATAL_ERR_CRC_ERR_TX = (1 << 11),
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FATAL_ERR_CRC_ERR_RX = (1 << 10),
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FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
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FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
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FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
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FATAL_ERR_PARITY_ERR_TX |
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FATAL_ERR_PARITY_ERR_RX |
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FATAL_ERR_DATA_UNDERRUN |
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FATAL_ERR_DATA_OVERRUN |
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FATAL_ERR_CRC_ERR_TX |
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FATAL_ERR_CRC_ERR_RX |
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FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
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INT_ON_FATAL_ERR = (1 << 5),
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INT_ON_PHYRDY_CHG = (1 << 4),
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INT_ON_SIGNATURE_UPDATE = (1 << 3),
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INT_ON_SNOTIFY_UPDATE = (1 << 2),
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INT_ON_SINGL_DEVICE_ERR = (1 << 1),
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INT_ON_CMD_COMPLETE = 1,
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INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE |
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INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
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/*
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* Host Control Register (HControl) bitdefs
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*/
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HCONTROL_ONLINE_PHY_RST = (1 << 31),
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HCONTROL_FORCE_OFFLINE = (1 << 30),
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HCONTROL_PARITY_PROT_MOD = (1 << 14),
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HCONTROL_DPATH_PARITY = (1 << 12),
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HCONTROL_SNOOP_ENABLE = (1 << 10),
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HCONTROL_PMP_ATTACHED = (1 << 9),
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HCONTROL_COPYOUT_STATFIS = (1 << 8),
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IE_ON_FATAL_ERR = (1 << 5),
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IE_ON_PHYRDY_CHG = (1 << 4),
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IE_ON_SIGNATURE_UPDATE = (1 << 3),
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IE_ON_SNOTIFY_UPDATE = (1 << 2),
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IE_ON_SINGL_DEVICE_ERR = (1 << 1),
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IE_ON_CMD_COMPLETE = 1,
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DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
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IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE |
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IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
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EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
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DATA_SNOOP_ENABLE = (1 << 22),
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};
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/*
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* SATA Superset Registers
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*/
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enum {
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SSTATUS = 0,
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SERROR = 4,
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SCONTROL = 8,
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SNOTIFY = 0xC,
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};
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/*
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* Control Status Register Set
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*/
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enum {
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TRANSCFG = 0,
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TRANSSTATUS = 4,
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LINKCFG = 8,
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LINKCFG1 = 0xC,
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LINKCFG2 = 0x10,
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LINKSTATUS = 0x14,
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LINKSTATUS1 = 0x18,
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PHYCTRLCFG = 0x1C,
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COMMANDSTAT = 0x20,
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};
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/* PHY (link-layer) configuration control */
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enum {
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PHY_BIST_ENABLE = 0x01,
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};
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/*
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* Command Header Table entry, i.e, command slot
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* 4 Dwords per command slot, command header size == 64 Dwords.
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*/
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struct cmdhdr_tbl_entry {
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u32 cda;
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u32 prde_fis_len;
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u32 ttl;
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u32 desc_info;
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};
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/*
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* Description information bitdefs
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*/
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enum {
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CMD_DESC_RES = (1 << 11),
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VENDOR_SPECIFIC_BIST = (1 << 10),
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CMD_DESC_SNOOP_ENABLE = (1 << 9),
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FPDMA_QUEUED_CMD = (1 << 8),
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SRST_CMD = (1 << 7),
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BIST = (1 << 6),
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ATAPI_CMD = (1 << 5),
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};
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/*
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* Command Descriptor
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*/
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struct command_desc {
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u8 cfis[8 * 4];
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u8 sfis[8 * 4];
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u8 acmd[4 * 4];
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u8 fill[4 * 4];
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u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4];
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u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4];
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};
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/*
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* Physical region table descriptor(PRD)
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*/
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struct prde {
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u32 dba;
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u8 fill[2 * 4];
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u32 ddc_and_ext;
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};
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/*
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* ata_port private data
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* This is our per-port instance data.
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*/
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struct sata_fsl_port_priv {
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struct cmdhdr_tbl_entry *cmdslot;
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dma_addr_t cmdslot_paddr;
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struct command_desc *cmdentry;
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dma_addr_t cmdentry_paddr;
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};
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/*
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* ata_port->host_set private data
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*/
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struct sata_fsl_host_priv {
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void __iomem *hcr_base;
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void __iomem *ssr_base;
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void __iomem *csr_base;
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int irq;
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};
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static inline unsigned int sata_fsl_tag(unsigned int tag,
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void __iomem *hcr_base)
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{
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/* We let libATA core do actual (queue) tag allocation */
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/* all non NCQ/queued commands should have tag#0 */
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if (ata_tag_internal(tag)) {
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DPRINTK("mapping internal cmds to tag#0\n");
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return 0;
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}
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if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
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DPRINTK("tag %d invalid : out of range\n", tag);
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return 0;
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}
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if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
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DPRINTK("tag %d invalid : in use!!\n", tag);
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return 0;
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}
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return tag;
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}
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static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
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unsigned int tag, u32 desc_info,
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u32 data_xfer_len, u8 num_prde,
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u8 fis_len)
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{
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dma_addr_t cmd_descriptor_address;
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cmd_descriptor_address = pp->cmdentry_paddr +
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tag * SATA_FSL_CMD_DESC_SIZE;
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/* NOTE: both data_xfer_len & fis_len are Dword counts */
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pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
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pp->cmdslot[tag].prde_fis_len =
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cpu_to_le32((num_prde << 16) | (fis_len << 2));
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pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
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pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
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VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
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pp->cmdslot[tag].cda,
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pp->cmdslot[tag].prde_fis_len,
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pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
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}
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static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
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u32 *ttl, dma_addr_t cmd_desc_paddr)
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{
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struct scatterlist *sg;
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unsigned int num_prde = 0;
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u32 ttl_dwords = 0;
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/*
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* NOTE : direct & indirect prdt's are contiguously allocated
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*/
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struct prde *prd = (struct prde *)&((struct command_desc *)
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cmd_desc)->prdt;
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struct prde *prd_ptr_to_indirect_ext = NULL;
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unsigned indirect_ext_segment_sz = 0;
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dma_addr_t indirect_ext_segment_paddr;
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unsigned int si;
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VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd);
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indirect_ext_segment_paddr = cmd_desc_paddr +
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SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
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for_each_sg(qc->sg, sg, qc->n_elem, si) {
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dma_addr_t sg_addr = sg_dma_address(sg);
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u32 sg_len = sg_dma_len(sg);
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VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%llx, sg_len = %d\n",
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(unsigned long long)sg_addr, sg_len);
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/* warn if each s/g element is not dword aligned */
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if (sg_addr & 0x03)
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ata_port_printk(qc->ap, KERN_ERR,
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"s/g addr unaligned : 0x%llx\n",
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(unsigned long long)sg_addr);
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if (sg_len & 0x03)
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ata_port_printk(qc->ap, KERN_ERR,
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"s/g len unaligned : 0x%x\n", sg_len);
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if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) &&
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sg_next(sg) != NULL) {
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VPRINTK("setting indirect prde\n");
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prd_ptr_to_indirect_ext = prd;
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prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
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indirect_ext_segment_sz = 0;
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++prd;
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++num_prde;
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}
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ttl_dwords += sg_len;
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prd->dba = cpu_to_le32(sg_addr);
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prd->ddc_and_ext =
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cpu_to_le32(DATA_SNOOP_ENABLE | (sg_len & ~0x03));
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VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
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ttl_dwords, prd->dba, prd->ddc_and_ext);
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++num_prde;
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++prd;
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if (prd_ptr_to_indirect_ext)
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indirect_ext_segment_sz += sg_len;
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}
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if (prd_ptr_to_indirect_ext) {
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/* set indirect extension flag along with indirect ext. size */
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prd_ptr_to_indirect_ext->ddc_and_ext =
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cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
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DATA_SNOOP_ENABLE |
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(indirect_ext_segment_sz & ~0x03)));
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}
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*ttl = ttl_dwords;
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return num_prde;
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}
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static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct sata_fsl_port_priv *pp = ap->private_data;
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struct sata_fsl_host_priv *host_priv = ap->host->private_data;
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void __iomem *hcr_base = host_priv->hcr_base;
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unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
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struct command_desc *cd;
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u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE;
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u32 num_prde = 0;
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u32 ttl_dwords = 0;
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dma_addr_t cd_paddr;
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cd = (struct command_desc *)pp->cmdentry + tag;
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cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
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ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis);
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VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
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cd->cfis[0], cd->cfis[1], cd->cfis[2]);
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if (qc->tf.protocol == ATA_PROT_NCQ) {
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VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
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cd->cfis[3], cd->cfis[11]);
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}
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/* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
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if (ata_is_atapi(qc->tf.protocol)) {
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desc_info |= ATAPI_CMD;
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memset((void *)&cd->acmd, 0, 32);
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memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
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}
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if (qc->flags & ATA_QCFLAG_DMAMAP)
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num_prde = sata_fsl_fill_sg(qc, (void *)cd,
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&ttl_dwords, cd_paddr);
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if (qc->tf.protocol == ATA_PROT_NCQ)
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desc_info |= FPDMA_QUEUED_CMD;
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sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
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num_prde, 5);
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VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
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desc_info, ttl_dwords, num_prde);
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}
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static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct sata_fsl_host_priv *host_priv = ap->host->private_data;
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void __iomem *hcr_base = host_priv->hcr_base;
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unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
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VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
|
|
ioread32(CQ + hcr_base),
|
|
ioread32(CA + hcr_base),
|
|
ioread32(CE + hcr_base), ioread32(CC + hcr_base));
|
|
|
|
iowrite32(qc->dev->link->pmp, CQPMP + hcr_base);
|
|
|
|
/* Simply queue command to the controller/device */
|
|
iowrite32(1 << tag, CQ + hcr_base);
|
|
|
|
VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n",
|
|
tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base));
|
|
|
|
VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n",
|
|
ioread32(CE + hcr_base),
|
|
ioread32(DE + hcr_base),
|
|
ioread32(CC + hcr_base),
|
|
ioread32(COMMANDSTAT + host_priv->csr_base));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc)
|
|
{
|
|
struct sata_fsl_port_priv *pp = qc->ap->private_data;
|
|
struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
|
|
struct command_desc *cd;
|
|
|
|
cd = pp->cmdentry + tag;
|
|
|
|
ata_tf_from_fis(cd->sfis, &qc->result_tf);
|
|
return true;
|
|
}
|
|
|
|
static int sata_fsl_scr_write(struct ata_link *link,
|
|
unsigned int sc_reg_in, u32 val)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
|
|
void __iomem *ssr_base = host_priv->ssr_base;
|
|
unsigned int sc_reg;
|
|
|
|
switch (sc_reg_in) {
|
|
case SCR_STATUS:
|
|
case SCR_ERROR:
|
|
case SCR_CONTROL:
|
|
case SCR_ACTIVE:
|
|
sc_reg = sc_reg_in;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
|
|
|
|
iowrite32(val, ssr_base + (sc_reg * 4));
|
|
return 0;
|
|
}
|
|
|
|
static int sata_fsl_scr_read(struct ata_link *link,
|
|
unsigned int sc_reg_in, u32 *val)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
|
|
void __iomem *ssr_base = host_priv->ssr_base;
|
|
unsigned int sc_reg;
|
|
|
|
switch (sc_reg_in) {
|
|
case SCR_STATUS:
|
|
case SCR_ERROR:
|
|
case SCR_CONTROL:
|
|
case SCR_ACTIVE:
|
|
sc_reg = sc_reg_in;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
|
|
|
|
*val = ioread32(ssr_base + (sc_reg * 4));
|
|
return 0;
|
|
}
|
|
|
|
static void sata_fsl_freeze(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
|
|
ioread32(CQ + hcr_base),
|
|
ioread32(CA + hcr_base),
|
|
ioread32(CE + hcr_base), ioread32(DE + hcr_base));
|
|
VPRINTK("CmdStat = 0x%x\n",
|
|
ioread32(host_priv->csr_base + COMMANDSTAT));
|
|
|
|
/* disable interrupts on the controller/port */
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
|
|
|
|
VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
|
|
ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
|
|
}
|
|
|
|
static void sata_fsl_thaw(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
/* ack. any pending IRQs for this controller/port */
|
|
temp = ioread32(hcr_base + HSTATUS);
|
|
|
|
VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
|
|
|
|
if (temp & 0x3F)
|
|
iowrite32((temp & 0x3F), hcr_base + HSTATUS);
|
|
|
|
/* enable interrupts on the controller/port */
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
|
|
|
|
VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
|
|
ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
|
|
}
|
|
|
|
static void sata_fsl_pmp_attach(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL);
|
|
}
|
|
|
|
static void sata_fsl_pmp_detach(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
temp &= ~HCONTROL_PMP_ATTACHED;
|
|
iowrite32(temp, hcr_base + HCONTROL);
|
|
|
|
/* enable interrupts on the controller/port */
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
|
|
|
|
}
|
|
|
|
static int sata_fsl_port_start(struct ata_port *ap)
|
|
{
|
|
struct device *dev = ap->host->dev;
|
|
struct sata_fsl_port_priv *pp;
|
|
void *mem;
|
|
dma_addr_t mem_dma;
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
pp = kzalloc(sizeof(*pp), GFP_KERNEL);
|
|
if (!pp)
|
|
return -ENOMEM;
|
|
|
|
mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
|
|
GFP_KERNEL);
|
|
if (!mem) {
|
|
kfree(pp);
|
|
return -ENOMEM;
|
|
}
|
|
memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ);
|
|
|
|
pp->cmdslot = mem;
|
|
pp->cmdslot_paddr = mem_dma;
|
|
|
|
mem += SATA_FSL_CMD_SLOT_SIZE;
|
|
mem_dma += SATA_FSL_CMD_SLOT_SIZE;
|
|
|
|
pp->cmdentry = mem;
|
|
pp->cmdentry_paddr = mem_dma;
|
|
|
|
ap->private_data = pp;
|
|
|
|
VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
|
|
pp->cmdslot_paddr, pp->cmdentry_paddr);
|
|
|
|
/* Now, update the CHBA register in host controller cmd register set */
|
|
iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
|
|
|
|
/*
|
|
* Now, we can bring the controller on-line & also initiate
|
|
* the COMINIT sequence, we simply return here and the boot-probing
|
|
* & device discovery process is re-initiated by libATA using a
|
|
* Softreset EH (dummy) session. Hence, boot probing and device
|
|
* discovey will be part of sata_fsl_softreset() callback.
|
|
*/
|
|
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
|
|
|
|
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
|
|
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
|
|
VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
|
|
|
|
#ifdef CONFIG_MPC8315_DS
|
|
/*
|
|
* Workaround for 8315DS board 3gbps link-up issue,
|
|
* currently limit SATA port to GEN1 speed
|
|
*/
|
|
sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
|
|
temp &= ~(0xF << 4);
|
|
temp |= (0x1 << 4);
|
|
sata_fsl_scr_write(&ap->link, SCR_CONTROL, temp);
|
|
|
|
sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
|
|
dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n",
|
|
temp);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sata_fsl_port_stop(struct ata_port *ap)
|
|
{
|
|
struct device *dev = ap->host->dev;
|
|
struct sata_fsl_port_priv *pp = ap->private_data;
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
/*
|
|
* Force host controller to go off-line, aborting current operations
|
|
*/
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
temp &= ~HCONTROL_ONLINE_PHY_RST;
|
|
temp |= HCONTROL_FORCE_OFFLINE;
|
|
iowrite32(temp, hcr_base + HCONTROL);
|
|
|
|
/* Poll for controller to go offline - should happen immediately */
|
|
ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
|
|
|
|
ap->private_data = NULL;
|
|
dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
|
|
pp->cmdslot, pp->cmdslot_paddr);
|
|
|
|
kfree(pp);
|
|
}
|
|
|
|
static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
struct ata_taskfile tf;
|
|
u32 temp;
|
|
|
|
temp = ioread32(hcr_base + SIGNATURE);
|
|
|
|
VPRINTK("raw sig = 0x%x\n", temp);
|
|
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
|
|
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
|
|
|
|
tf.lbah = (temp >> 24) & 0xff;
|
|
tf.lbam = (temp >> 16) & 0xff;
|
|
tf.lbal = (temp >> 8) & 0xff;
|
|
tf.nsect = temp & 0xff;
|
|
|
|
return ata_dev_classify(&tf);
|
|
}
|
|
|
|
static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class,
|
|
unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
int i = 0;
|
|
unsigned long start_jiffies;
|
|
|
|
DPRINTK("in xx_hardreset\n");
|
|
|
|
try_offline_again:
|
|
/*
|
|
* Force host controller to go off-line, aborting current operations
|
|
*/
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
temp &= ~HCONTROL_ONLINE_PHY_RST;
|
|
iowrite32(temp, hcr_base + HCONTROL);
|
|
|
|
/* Poll for controller to go offline */
|
|
temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 500);
|
|
|
|
if (temp & ONLINE) {
|
|
ata_port_printk(ap, KERN_ERR,
|
|
"Hardreset failed, not off-lined %d\n", i);
|
|
|
|
/*
|
|
* Try to offline controller atleast twice
|
|
*/
|
|
i++;
|
|
if (i == 2)
|
|
goto err;
|
|
else
|
|
goto try_offline_again;
|
|
}
|
|
|
|
DPRINTK("hardreset, controller off-lined\n");
|
|
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
|
|
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
|
|
|
|
/*
|
|
* PHY reset should remain asserted for atleast 1ms
|
|
*/
|
|
msleep(1);
|
|
|
|
/*
|
|
* Now, bring the host controller online again, this can take time
|
|
* as PHY reset and communication establishment, 1st D2H FIS and
|
|
* device signature update is done, on safe side assume 500ms
|
|
* NOTE : Host online status may be indicated immediately!!
|
|
*/
|
|
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
|
|
temp |= HCONTROL_PMP_ATTACHED;
|
|
iowrite32(temp, hcr_base + HCONTROL);
|
|
|
|
temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, 0, 1, 500);
|
|
|
|
if (!(temp & ONLINE)) {
|
|
ata_port_printk(ap, KERN_ERR,
|
|
"Hardreset failed, not on-lined\n");
|
|
goto err;
|
|
}
|
|
|
|
DPRINTK("hardreset, controller off-lined & on-lined\n");
|
|
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
|
|
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
|
|
|
|
/*
|
|
* First, wait for the PHYRDY change to occur before waiting for
|
|
* the signature, and also verify if SStatus indicates device
|
|
* presence
|
|
*/
|
|
|
|
temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0, 1, 500);
|
|
if ((!(temp & 0x10)) || ata_link_offline(link)) {
|
|
ata_port_printk(ap, KERN_WARNING,
|
|
"No Device OR PHYRDY change,Hstatus = 0x%x\n",
|
|
ioread32(hcr_base + HSTATUS));
|
|
*class = ATA_DEV_NONE;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Wait for the first D2H from device,i.e,signature update notification
|
|
*/
|
|
start_jiffies = jiffies;
|
|
temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0x10,
|
|
500, jiffies_to_msecs(deadline - start_jiffies));
|
|
|
|
if ((temp & 0xFF) != 0x18) {
|
|
ata_port_printk(ap, KERN_WARNING, "No Signature Update\n");
|
|
*class = ATA_DEV_NONE;
|
|
goto do_followup_srst;
|
|
} else {
|
|
ata_port_printk(ap, KERN_INFO,
|
|
"Signature Update detected @ %d msecs\n",
|
|
jiffies_to_msecs(jiffies - start_jiffies));
|
|
*class = sata_fsl_dev_classify(ap);
|
|
return 0;
|
|
}
|
|
|
|
do_followup_srst:
|
|
/*
|
|
* request libATA to perform follow-up softreset
|
|
*/
|
|
return -EAGAIN;
|
|
|
|
err:
|
|
return -EIO;
|
|
}
|
|
|
|
static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
|
|
unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
struct sata_fsl_port_priv *pp = ap->private_data;
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
int pmp = sata_srst_pmp(link);
|
|
u32 temp;
|
|
struct ata_taskfile tf;
|
|
u8 *cfis;
|
|
u32 Serror;
|
|
|
|
DPRINTK("in xx_softreset\n");
|
|
|
|
if (ata_link_offline(link)) {
|
|
DPRINTK("PHY reports no device\n");
|
|
*class = ATA_DEV_NONE;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Send a device reset (SRST) explicitly on command slot #0
|
|
* Check : will the command queue (reg) be cleared during offlining ??
|
|
* Also we will be online only if Phy commn. has been established
|
|
* and device presence has been detected, therefore if we have
|
|
* reached here, we can send a command to the target device
|
|
*/
|
|
|
|
DPRINTK("Sending SRST/device reset\n");
|
|
|
|
ata_tf_init(link->device, &tf);
|
|
cfis = (u8 *) &pp->cmdentry->cfis;
|
|
|
|
/* device reset/SRST is a control register update FIS, uses tag0 */
|
|
sata_fsl_setup_cmd_hdr_entry(pp, 0,
|
|
SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
|
|
|
|
tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
|
|
ata_tf_to_fis(&tf, pmp, 0, cfis);
|
|
|
|
DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
|
|
cfis[0], cfis[1], cfis[2], cfis[3]);
|
|
|
|
/*
|
|
* Queue SRST command to the controller/device, ensure that no
|
|
* other commands are active on the controller/device
|
|
*/
|
|
|
|
DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
|
|
ioread32(CQ + hcr_base),
|
|
ioread32(CA + hcr_base), ioread32(CC + hcr_base));
|
|
|
|
iowrite32(0xFFFF, CC + hcr_base);
|
|
if (pmp != SATA_PMP_CTRL_PORT)
|
|
iowrite32(pmp, CQPMP + hcr_base);
|
|
iowrite32(1, CQ + hcr_base);
|
|
|
|
temp = ata_wait_register(CQ + hcr_base, 0x1, 0x1, 1, 5000);
|
|
if (temp & 0x1) {
|
|
ata_port_printk(ap, KERN_WARNING, "ATA_SRST issue failed\n");
|
|
|
|
DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
|
|
ioread32(CQ + hcr_base),
|
|
ioread32(CA + hcr_base), ioread32(CC + hcr_base));
|
|
|
|
sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror);
|
|
|
|
DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
|
|
DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
|
|
DPRINTK("Serror = 0x%x\n", Serror);
|
|
goto err;
|
|
}
|
|
|
|
msleep(1);
|
|
|
|
/*
|
|
* SATA device enters reset state after receving a Control register
|
|
* FIS with SRST bit asserted and it awaits another H2D Control reg.
|
|
* FIS with SRST bit cleared, then the device does internal diags &
|
|
* initialization, followed by indicating it's initialization status
|
|
* using ATA signature D2H register FIS to the host controller.
|
|
*/
|
|
|
|
sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE,
|
|
0, 0, 5);
|
|
|
|
tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
|
|
ata_tf_to_fis(&tf, pmp, 0, cfis);
|
|
|
|
if (pmp != SATA_PMP_CTRL_PORT)
|
|
iowrite32(pmp, CQPMP + hcr_base);
|
|
iowrite32(1, CQ + hcr_base);
|
|
msleep(150); /* ?? */
|
|
|
|
/*
|
|
* The above command would have signalled an interrupt on command
|
|
* complete, which needs special handling, by clearing the Nth
|
|
* command bit of the CCreg
|
|
*/
|
|
iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
|
|
|
|
DPRINTK("SATA FSL : Now checking device signature\n");
|
|
|
|
*class = ATA_DEV_NONE;
|
|
|
|
/* Verify if SStatus indicates device presence */
|
|
if (ata_link_online(link)) {
|
|
/*
|
|
* if we are here, device presence has been detected,
|
|
* 1st D2H FIS would have been received, but sfis in
|
|
* command desc. is not updated, but signature register
|
|
* would have been updated
|
|
*/
|
|
|
|
*class = sata_fsl_dev_classify(ap);
|
|
|
|
DPRINTK("class = %d\n", *class);
|
|
VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
|
|
VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return -EIO;
|
|
}
|
|
|
|
static void sata_fsl_error_handler(struct ata_port *ap)
|
|
{
|
|
|
|
DPRINTK("in xx_error_handler\n");
|
|
sata_pmp_error_handler(ap);
|
|
|
|
}
|
|
|
|
static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
|
|
{
|
|
if (qc->flags & ATA_QCFLAG_FAILED)
|
|
qc->err_mask |= AC_ERR_OTHER;
|
|
|
|
if (qc->err_mask) {
|
|
/* make DMA engine forget about the failed command */
|
|
|
|
}
|
|
}
|
|
|
|
static void sata_fsl_error_intr(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 hstatus, dereg=0, cereg = 0, SError = 0;
|
|
unsigned int err_mask = 0, action = 0;
|
|
int freeze = 0, abort=0;
|
|
struct ata_link *link = NULL;
|
|
struct ata_queued_cmd *qc = NULL;
|
|
struct ata_eh_info *ehi;
|
|
|
|
hstatus = ioread32(hcr_base + HSTATUS);
|
|
cereg = ioread32(hcr_base + CE);
|
|
|
|
/* first, analyze and record host port events */
|
|
link = &ap->link;
|
|
ehi = &link->eh_info;
|
|
ata_ehi_clear_desc(ehi);
|
|
|
|
/*
|
|
* Handle & Clear SError
|
|
*/
|
|
|
|
sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
|
|
if (unlikely(SError & 0xFFFF0000))
|
|
sata_fsl_scr_write(&ap->link, SCR_ERROR, SError);
|
|
|
|
DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
|
|
hstatus, cereg, ioread32(hcr_base + DE), SError);
|
|
|
|
/* handle fatal errors */
|
|
if (hstatus & FATAL_ERROR_DECODE) {
|
|
ehi->err_mask |= AC_ERR_ATA_BUS;
|
|
ehi->action |= ATA_EH_SOFTRESET;
|
|
|
|
freeze = 1;
|
|
}
|
|
|
|
/* Handle SDB FIS receive & notify update */
|
|
if (hstatus & INT_ON_SNOTIFY_UPDATE)
|
|
sata_async_notification(ap);
|
|
|
|
/* Handle PHYRDY change notification */
|
|
if (hstatus & INT_ON_PHYRDY_CHG) {
|
|
DPRINTK("SATA FSL: PHYRDY change indication\n");
|
|
|
|
/* Setup a soft-reset EH action */
|
|
ata_ehi_hotplugged(ehi);
|
|
ata_ehi_push_desc(ehi, "%s", "PHY RDY changed");
|
|
freeze = 1;
|
|
}
|
|
|
|
/* handle single device errors */
|
|
if (cereg) {
|
|
/*
|
|
* clear the command error, also clears queue to the device
|
|
* in error, and we can (re)issue commands to this device.
|
|
* When a device is in error all commands queued into the
|
|
* host controller and at the device are considered aborted
|
|
* and the queue for that device is stopped. Now, after
|
|
* clearing the device error, we can issue commands to the
|
|
* device to interrogate it to find the source of the error.
|
|
*/
|
|
abort = 1;
|
|
|
|
DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
|
|
ioread32(hcr_base + CE), ioread32(hcr_base + DE));
|
|
|
|
/* find out the offending link and qc */
|
|
if (ap->nr_pmp_links) {
|
|
dereg = ioread32(hcr_base + DE);
|
|
iowrite32(dereg, hcr_base + DE);
|
|
iowrite32(cereg, hcr_base + CE);
|
|
|
|
if (dereg < ap->nr_pmp_links) {
|
|
link = &ap->pmp_link[dereg];
|
|
ehi = &link->eh_info;
|
|
qc = ata_qc_from_tag(ap, link->active_tag);
|
|
/*
|
|
* We should consider this as non fatal error,
|
|
* and TF must be updated as done below.
|
|
*/
|
|
|
|
err_mask |= AC_ERR_DEV;
|
|
|
|
} else {
|
|
err_mask |= AC_ERR_HSM;
|
|
action |= ATA_EH_HARDRESET;
|
|
freeze = 1;
|
|
}
|
|
} else {
|
|
dereg = ioread32(hcr_base + DE);
|
|
iowrite32(dereg, hcr_base + DE);
|
|
iowrite32(cereg, hcr_base + CE);
|
|
|
|
qc = ata_qc_from_tag(ap, link->active_tag);
|
|
/*
|
|
* We should consider this as non fatal error,
|
|
* and TF must be updated as done below.
|
|
*/
|
|
err_mask |= AC_ERR_DEV;
|
|
}
|
|
}
|
|
|
|
/* record error info */
|
|
if (qc)
|
|
qc->err_mask |= err_mask;
|
|
else
|
|
ehi->err_mask |= err_mask;
|
|
|
|
ehi->action |= action;
|
|
|
|
/* freeze or abort */
|
|
if (freeze)
|
|
ata_port_freeze(ap);
|
|
else if (abort) {
|
|
if (qc)
|
|
ata_link_abort(qc->dev->link);
|
|
else
|
|
ata_port_abort(ap);
|
|
}
|
|
}
|
|
|
|
static void sata_fsl_host_intr(struct ata_port *ap)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 hstatus, done_mask = 0;
|
|
struct ata_queued_cmd *qc;
|
|
u32 SError;
|
|
|
|
hstatus = ioread32(hcr_base + HSTATUS);
|
|
|
|
sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
|
|
|
|
if (unlikely(SError & 0xFFFF0000)) {
|
|
DPRINTK("serror @host_intr : 0x%x\n", SError);
|
|
sata_fsl_error_intr(ap);
|
|
}
|
|
|
|
if (unlikely(hstatus & INT_ON_ERROR)) {
|
|
DPRINTK("error interrupt!!\n");
|
|
sata_fsl_error_intr(ap);
|
|
return;
|
|
}
|
|
|
|
/* Read command completed register */
|
|
done_mask = ioread32(hcr_base + CC);
|
|
|
|
VPRINTK("Status of all queues :\n");
|
|
VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n",
|
|
done_mask,
|
|
ioread32(hcr_base + CA),
|
|
ioread32(hcr_base + CE),
|
|
ioread32(hcr_base + CQ),
|
|
ap->qc_active);
|
|
|
|
if (done_mask & ap->qc_active) {
|
|
int i;
|
|
/* clear CC bit, this will also complete the interrupt */
|
|
iowrite32(done_mask, hcr_base + CC);
|
|
|
|
DPRINTK("Status of all queues :\n");
|
|
DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
|
|
done_mask, ioread32(hcr_base + CA),
|
|
ioread32(hcr_base + CE));
|
|
|
|
for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
|
|
if (done_mask & (1 << i)) {
|
|
qc = ata_qc_from_tag(ap, i);
|
|
if (qc) {
|
|
ata_qc_complete(qc);
|
|
}
|
|
DPRINTK
|
|
("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
|
|
i, ioread32(hcr_base + CC),
|
|
ioread32(hcr_base + CA));
|
|
}
|
|
}
|
|
return;
|
|
|
|
} else if ((ap->qc_active & (1 << ATA_TAG_INTERNAL))) {
|
|
iowrite32(1, hcr_base + CC);
|
|
qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
|
|
|
|
DPRINTK("completing non-ncq cmd, CC=0x%x\n",
|
|
ioread32(hcr_base + CC));
|
|
|
|
if (qc) {
|
|
ata_qc_complete(qc);
|
|
}
|
|
} else {
|
|
/* Spurious Interrupt!! */
|
|
DPRINTK("spurious interrupt!!, CC = 0x%x\n",
|
|
ioread32(hcr_base + CC));
|
|
iowrite32(done_mask, hcr_base + CC);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
|
|
{
|
|
struct ata_host *host = dev_instance;
|
|
struct sata_fsl_host_priv *host_priv = host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 interrupt_enables;
|
|
unsigned handled = 0;
|
|
struct ata_port *ap;
|
|
|
|
/* ack. any pending IRQs for this controller/port */
|
|
interrupt_enables = ioread32(hcr_base + HSTATUS);
|
|
interrupt_enables &= 0x3F;
|
|
|
|
DPRINTK("interrupt status 0x%x\n", interrupt_enables);
|
|
|
|
if (!interrupt_enables)
|
|
return IRQ_NONE;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
/* Assuming one port per host controller */
|
|
|
|
ap = host->ports[0];
|
|
if (ap) {
|
|
sata_fsl_host_intr(ap);
|
|
} else {
|
|
dev_printk(KERN_WARNING, host->dev,
|
|
"interrupt on disabled port 0\n");
|
|
}
|
|
|
|
iowrite32(interrupt_enables, hcr_base + HSTATUS);
|
|
handled = 1;
|
|
|
|
spin_unlock(&host->lock);
|
|
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
/*
|
|
* Multiple ports are represented by multiple SATA controllers with
|
|
* one port per controller
|
|
*/
|
|
static int sata_fsl_init_controller(struct ata_host *host)
|
|
{
|
|
struct sata_fsl_host_priv *host_priv = host->private_data;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
u32 temp;
|
|
|
|
/*
|
|
* NOTE : We cannot bring the controller online before setting
|
|
* the CHBA, hence main controller initialization is done as
|
|
* part of the port_start() callback
|
|
*/
|
|
|
|
/* ack. any pending IRQs for this controller/port */
|
|
temp = ioread32(hcr_base + HSTATUS);
|
|
if (temp & 0x3F)
|
|
iowrite32((temp & 0x3F), hcr_base + HSTATUS);
|
|
|
|
/* Keep interrupts disabled on the controller */
|
|
temp = ioread32(hcr_base + HCONTROL);
|
|
iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
|
|
|
|
/* Disable interrupt coalescing control(icc), for the moment */
|
|
DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
|
|
iowrite32(0x01000000, hcr_base + ICC);
|
|
|
|
/* clear error registers, SError is cleared by libATA */
|
|
iowrite32(0x00000FFFF, hcr_base + CE);
|
|
iowrite32(0x00000FFFF, hcr_base + DE);
|
|
|
|
/*
|
|
* host controller will be brought on-line, during xx_port_start()
|
|
* callback, that should also initiate the OOB, COMINIT sequence
|
|
*/
|
|
|
|
DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
|
|
DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* scsi mid-layer and libata interface structures
|
|
*/
|
|
static struct scsi_host_template sata_fsl_sht = {
|
|
ATA_NCQ_SHT("sata_fsl"),
|
|
.can_queue = SATA_FSL_QUEUE_DEPTH,
|
|
.sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
|
|
.dma_boundary = ATA_DMA_BOUNDARY,
|
|
};
|
|
|
|
static struct ata_port_operations sata_fsl_ops = {
|
|
.inherits = &sata_pmp_port_ops,
|
|
|
|
.qc_defer = ata_std_qc_defer,
|
|
.qc_prep = sata_fsl_qc_prep,
|
|
.qc_issue = sata_fsl_qc_issue,
|
|
.qc_fill_rtf = sata_fsl_qc_fill_rtf,
|
|
|
|
.scr_read = sata_fsl_scr_read,
|
|
.scr_write = sata_fsl_scr_write,
|
|
|
|
.freeze = sata_fsl_freeze,
|
|
.thaw = sata_fsl_thaw,
|
|
.softreset = sata_fsl_softreset,
|
|
.hardreset = sata_fsl_hardreset,
|
|
.pmp_softreset = sata_fsl_softreset,
|
|
.error_handler = sata_fsl_error_handler,
|
|
.post_internal_cmd = sata_fsl_post_internal_cmd,
|
|
|
|
.port_start = sata_fsl_port_start,
|
|
.port_stop = sata_fsl_port_stop,
|
|
|
|
.pmp_attach = sata_fsl_pmp_attach,
|
|
.pmp_detach = sata_fsl_pmp_detach,
|
|
};
|
|
|
|
static const struct ata_port_info sata_fsl_port_info[] = {
|
|
{
|
|
.flags = SATA_FSL_HOST_FLAGS,
|
|
.pio_mask = ATA_PIO4,
|
|
.udma_mask = ATA_UDMA6,
|
|
.port_ops = &sata_fsl_ops,
|
|
},
|
|
};
|
|
|
|
static int sata_fsl_probe(struct of_device *ofdev,
|
|
const struct of_device_id *match)
|
|
{
|
|
int retval = -ENXIO;
|
|
void __iomem *hcr_base = NULL;
|
|
void __iomem *ssr_base = NULL;
|
|
void __iomem *csr_base = NULL;
|
|
struct sata_fsl_host_priv *host_priv = NULL;
|
|
int irq;
|
|
struct ata_host *host;
|
|
|
|
struct ata_port_info pi = sata_fsl_port_info[0];
|
|
const struct ata_port_info *ppi[] = { &pi, NULL };
|
|
|
|
dev_printk(KERN_INFO, &ofdev->dev,
|
|
"Sata FSL Platform/CSB Driver init\n");
|
|
|
|
hcr_base = of_iomap(ofdev->dev.of_node, 0);
|
|
if (!hcr_base)
|
|
goto error_exit_with_cleanup;
|
|
|
|
ssr_base = hcr_base + 0x100;
|
|
csr_base = hcr_base + 0x140;
|
|
|
|
DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
|
|
DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
|
|
DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
|
|
|
|
host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
|
|
if (!host_priv)
|
|
goto error_exit_with_cleanup;
|
|
|
|
host_priv->hcr_base = hcr_base;
|
|
host_priv->ssr_base = ssr_base;
|
|
host_priv->csr_base = csr_base;
|
|
|
|
irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
|
|
if (irq < 0) {
|
|
dev_printk(KERN_ERR, &ofdev->dev, "invalid irq from platform\n");
|
|
goto error_exit_with_cleanup;
|
|
}
|
|
host_priv->irq = irq;
|
|
|
|
/* allocate host structure */
|
|
host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
|
|
|
|
/* host->iomap is not used currently */
|
|
host->private_data = host_priv;
|
|
|
|
/* initialize host controller */
|
|
sata_fsl_init_controller(host);
|
|
|
|
/*
|
|
* Now, register with libATA core, this will also initiate the
|
|
* device discovery process, invoking our port_start() handler &
|
|
* error_handler() to execute a dummy Softreset EH session
|
|
*/
|
|
ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
|
|
&sata_fsl_sht);
|
|
|
|
dev_set_drvdata(&ofdev->dev, host);
|
|
|
|
return 0;
|
|
|
|
error_exit_with_cleanup:
|
|
|
|
if (hcr_base)
|
|
iounmap(hcr_base);
|
|
if (host_priv)
|
|
kfree(host_priv);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int sata_fsl_remove(struct of_device *ofdev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&ofdev->dev);
|
|
struct sata_fsl_host_priv *host_priv = host->private_data;
|
|
|
|
ata_host_detach(host);
|
|
|
|
dev_set_drvdata(&ofdev->dev, NULL);
|
|
|
|
irq_dispose_mapping(host_priv->irq);
|
|
iounmap(host_priv->hcr_base);
|
|
kfree(host_priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int sata_fsl_suspend(struct of_device *op, pm_message_t state)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&op->dev);
|
|
return ata_host_suspend(host, state);
|
|
}
|
|
|
|
static int sata_fsl_resume(struct of_device *op)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&op->dev);
|
|
struct sata_fsl_host_priv *host_priv = host->private_data;
|
|
int ret;
|
|
void __iomem *hcr_base = host_priv->hcr_base;
|
|
struct ata_port *ap = host->ports[0];
|
|
struct sata_fsl_port_priv *pp = ap->private_data;
|
|
|
|
ret = sata_fsl_init_controller(host);
|
|
if (ret) {
|
|
dev_printk(KERN_ERR, &op->dev,
|
|
"Error initialize hardware\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Recovery the CHBA register in host controller cmd register set */
|
|
iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
|
|
|
|
ata_host_resume(host);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct of_device_id fsl_sata_match[] = {
|
|
{
|
|
.compatible = "fsl,pq-sata",
|
|
},
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, fsl_sata_match);
|
|
|
|
static struct of_platform_driver fsl_sata_driver = {
|
|
.driver = {
|
|
.name = "fsl-sata",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = fsl_sata_match,
|
|
},
|
|
.probe = sata_fsl_probe,
|
|
.remove = sata_fsl_remove,
|
|
#ifdef CONFIG_PM
|
|
.suspend = sata_fsl_suspend,
|
|
.resume = sata_fsl_resume,
|
|
#endif
|
|
};
|
|
|
|
static int __init sata_fsl_init(void)
|
|
{
|
|
of_register_platform_driver(&fsl_sata_driver);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit sata_fsl_exit(void)
|
|
{
|
|
of_unregister_platform_driver(&fsl_sata_driver);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
|
|
MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
|
|
MODULE_VERSION("1.10");
|
|
|
|
module_init(sata_fsl_init);
|
|
module_exit(sata_fsl_exit);
|