935 lines
25 KiB
Diff
935 lines
25 KiB
Diff
From 8e46c06091fd87904205a977be3c784e3ac61e95 Mon Sep 17 00:00:00 2001
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From: Jingchang Lu <b35083@freescale.com>
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Date: Thu, 4 Aug 2011 09:59:48 +0800
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Subject: [PATCH 37/52] Add ColdFire MCF54455 PATA interface support
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ColdFire MCF54455 parallel ATA controller support
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both uDMA and PIO mode, this driver implements all.
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Signed-off-by: Jingchang Lu <b35083@freescale.com>
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---
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arch/m68k/include/asm/pata_fsl.h | 17 +
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drivers/ata/Kconfig | 23 +-
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drivers/ata/Makefile | 1 +
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drivers/ata/pata_fsl.c | 844 ++++++++++++++++++++++++++++++++++++++
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4 files changed, 884 insertions(+), 1 deletions(-)
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create mode 100644 arch/m68k/include/asm/pata_fsl.h
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create mode 100644 drivers/ata/pata_fsl.c
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--- /dev/null
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+++ b/arch/m68k/include/asm/pata_fsl.h
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@@ -0,0 +1,17 @@
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+/*
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+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
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+ *
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+ * This file is subject to the terms and conditions of the GNU General Public
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+ * License. See the file COPYING in the main directory of this archive
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+ * for more details.
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+ */
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+
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+#ifndef _ASM_M68K_PATA_FSL_H
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+#define _ASM_M68K_PATA_FSL_H
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+
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+/* ATA mapped IO address translate function */
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+extern unsigned int io_ata_virt2phys(void *x);
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+extern void *io_ata_phys2virt(unsigned int x);
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+
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+
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+#endif
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--- a/drivers/ata/Kconfig
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+++ b/drivers/ata/Kconfig
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@@ -14,7 +14,7 @@ menuconfig ATA
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tristate "Serial ATA and Parallel ATA drivers"
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depends on HAS_IOMEM
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depends on BLOCK
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- depends on !(M32R || M68K) || BROKEN
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+ depends on !(M32R) || BROKEN
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select SCSI
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---help---
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If you want to use a ATA hard disk, ATA tape drive, ATA CD-ROM or
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@@ -687,6 +687,27 @@ config PATA_WINBOND
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If unsure, say N.
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+config PATA_FSL
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+ tristate "Freescale on-chip PATA support"
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+ depends on (ARCH_MX3 || ARCH_MX27 || PPC_512x || M54455)
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+ help
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+ Some Freescale processors SOC have parallel ATA controller,
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+ such as ColdFire MCF54455.
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+
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+ Say Y here if you wish to use the on-chip ATA interface.
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+
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+ If you are unsure, say N to this.
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+
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+config FSL_PATA_USE_DMA
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+ bool "Freescale PATA eDMA support"
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+ depends on PATA_FSL && COLDFIRE_EDMA
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+ default y
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+ help
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+ This option enables the uDMA support over PATA interface
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+ which can improve performance than PIO mode for read and write.
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+
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+ If unsure, say Y.
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+
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endif # ATA_BMDMA
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comment "PIO-only SFF controllers"
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--- a/drivers/ata/Makefile
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+++ b/drivers/ata/Makefile
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@@ -72,6 +72,7 @@ obj-$(CONFIG_PATA_TOSHIBA) += pata_picco
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obj-$(CONFIG_PATA_TRIFLEX) += pata_triflex.o
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obj-$(CONFIG_PATA_VIA) += pata_via.o
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obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
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+obj-$(CONFIG_PATA_FSL) += pata_fsl.o
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# SFF PIO only
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obj-$(CONFIG_PATA_AT32) += pata_at32.o
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--- /dev/null
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+++ b/drivers/ata/pata_fsl.c
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@@ -0,0 +1,844 @@
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+/*
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+ * Freescale integrated PATA driver
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+ *
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+ * Copyright (C) 2007-2011 Freescale Semiconductor, Inc. All Rights Reserved.
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+ *
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+ * Description:
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+ * This driver is for Coldfire MCF54455 on-chip ATA module.
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+ *
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+ * This is free software; you can redistribute it and/or modify it
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+ * under the GNU General Public License as published by the Free
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+ * Software Foundation; either version 2 of the License, or (at
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+ * your option) any later version.
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+ *
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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/init.h>
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+#include <linux/blkdev.h>
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+#include <scsi/scsi_host.h>
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+#include <linux/ata.h>
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+#include <linux/libata.h>
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+#include <linux/platform_device.h>
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+#include <linux/fsl_devices.h>
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+#ifdef CONFIG_FSL_PATA_USE_DMA
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+#include <asm/mcf_edma.h>
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+#endif
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+#include <asm/pata_fsl.h>
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+
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+#define DRV_NAME "pata_fsl"
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+#define DRV_VERSION "1.0"
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+
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+#ifdef CONFIG_M54455
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+#define WRITE_ATA8(val, reg) \
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+ __raw_writeb(val, (ata_regs + reg));
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+#define WRITE_ATA16(val, reg) \
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+ __raw_writew(val, (ata_regs + reg));
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+#else
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+#define WRITE_ATA8(val, reg) \
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+ __raw_writel(val, (ata_regs + reg));
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+#define WRITE_ATA16(val, reg) \
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+ __raw_writel(val, (ata_regs + reg));
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+#endif
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+
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+#define MAX_FSL_SG 256 /* MCF_EDMA_TCD_PER_CHAN */
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+
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+struct pata_fsl_priv {
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+#ifdef CONFIG_FSL_PATA_USE_DMA
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+ int ultra;
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+#endif
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+ u8 *fsl_ata_regs;
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+#ifdef CONFIG_FSL_PATA_USE_DMA
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+ int dma_rchan;
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+ int dma_wchan;
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+ int dma_done;
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+ int dma_dir;
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+#if 0
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+ int nsg;
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+ struct fsl_edma_requestbuf reqbuf[MAX_FSL_SG];
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+#endif
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+#endif
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+};
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+
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+enum {
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+ /* various constants */
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+
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+#ifdef CONFIG_FSL_PATA_USE_DMA
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+ FSL_ATA_MAX_SG_LEN = 65534,
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+#endif
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+
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+ /* offsets to registers */
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+
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+ FSL_ATA_TIMING_REGS = 0x00,
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+ FSL_ATA_FIFO_FILL = 0x20,
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+ FSL_ATA_CONTROL = 0x24,
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+ FSL_ATA_INT_PEND = 0x28,
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+ FSL_ATA_INT_EN = 0x2C,
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+ FSL_ATA_INT_CLEAR = 0x30,
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+ FSL_ATA_FIFO_ALARM = 0x34,
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+ FSL_ATA_DRIVE_DATA = 0xA0,
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+ FSL_ATA_DRIVE_CONTROL = 0xD8,
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+
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+ /* bits within FSL_ATA_CONTROL */
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+
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+ FSL_ATA_CTRL_FIFO_RST_B = 0x80,
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+ FSL_ATA_CTRL_ATA_RST_B = 0x40,
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+ FSL_ATA_CTRL_FIFO_TX_EN = 0x20,
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+ FSL_ATA_CTRL_FIFO_RCV_EN = 0x10,
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+ FSL_ATA_CTRL_DMA_PENDING = 0x08,
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+ FSL_ATA_CTRL_DMA_ULTRA = 0x04,
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+ FSL_ATA_CTRL_DMA_WRITE = 0x02,
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+ FSL_ATA_CTRL_IORDY_EN = 0x01,
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+
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+ /* bits within the interrupt control registers */
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+
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+ FSL_ATA_INTR_ATA_INTRQ1 = 0x80,
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+ FSL_ATA_INTR_FIFO_UNDERFLOW = 0x40,
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+ FSL_ATA_INTR_FIFO_OVERFLOW = 0x20,
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+ FSL_ATA_INTR_CTRL_IDLE = 0x10,
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+ FSL_ATA_INTR_ATA_INTRQ2 = 0x08,
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+};
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+
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+/*
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+ * This structure contains the timing parameters for
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+ * ATA bus timing in the 5 PIO modes. The timings
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+ * are in nanoseconds, and are converted to clock
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+ * cycles before being stored in the ATA controller
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+ * timing registers.
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+ */
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+static struct {
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+ short t0, t1, t2_8, t2_16, t2i, t4, t9, tA;
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+} pio_specs[] = {
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+ [0] = {
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+ .t0 = 600, .t1 = 70, .t2_8 = 290, .t2_16 = 165, .t2i = 0,
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+ .t4 = 30, .t9 = 20, .tA = 50
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+ },
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+ [1] = {
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+ .t0 = 383, .t1 = 50, .t2_8 = 290, .t2_16 = 125, .t2i = 0,
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+ .t4 = 20, .t9 = 15, .tA = 50
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+ },
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+ [2] = {
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+ .t0 = 240, .t1 = 30, .t2_8 = 290, .t2_16 = 100, .t2i = 0,
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+ .t4 = 15, .t9 = 10, .tA = 50
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+ },
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+ [3] = {
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+ .t0 = 180, .t1 = 30, .t2_8 = 80, .t2_16 = 80, .t2i = 0,
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+ .t4 = 10, .t9 = 10, .tA = 50
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+ },
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+ [4] = {
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+ .t0 = 120, .t1 = 25, .t2_8 = 70, .t2_16 = 70, .t2i = 0,
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+ .t4 = 10, .t9 = 10, .tA = 50
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+ },
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+};
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+
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+#define NR_PIO_SPECS (sizeof pio_specs / sizeof pio_specs[0])
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+
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+/*
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+ * This structure contains the timing parameters for
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+ * ATA bus timing in the 3 MDMA modes. The timings
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+ * are in nanoseconds, and are converted to clock
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+ * cycles before being stored in the ATA controller
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+ * timing registers.
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+ */
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+static struct {
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+ short t0M, tD, tH, tJ, tKW, tM, tN, tJNH;
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+} mdma_specs[] = {
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+ [0] = {
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+ .t0M = 480, .tD = 215, .tH = 20, .tJ = 20, .tKW = 215,
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+ .tM = 50, .tN = 15, .tJNH = 20
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+ },
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+ [1] = {
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+ .t0M = 150, .tD = 80, .tH = 15, .tJ = 5, .tKW = 50,
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+ .tM = 30, .tN = 10, .tJNH = 15
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+ },
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+ [2] = {
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+ .t0M = 120, .tD = 70, .tH = 10, .tJ = 5, .tKW = 25,
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+ .tM = 25, .tN = 10, .tJNH = 10
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+ },
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+};
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+
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+#define NR_MDMA_SPECS (sizeof mdma_specs / sizeof mdma_specs[0])
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+
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+/*
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+ * This structure contains the timing parameters for
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+ * ATA bus timing in the 6 UDMA modes. The timings
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+ * are in nanoseconds, and are converted to clock
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+ * cycles before being stored in the ATA controller
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+ * timing registers.
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+ */
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+static struct {
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+ short t2CYC, tCYC, tDS, tDH, tDVS, tDVH, tCVS, tCVH, tFS_min, tLI_max,
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+ tMLI, tAZ, tZAH, tENV_min, tSR, tRFS, tRP, tACK, tSS, tDZFS;
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+} udma_specs[] = {
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+ [0] = {
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+ .t2CYC = 235, .tCYC = 114, .tDS = 15, .tDH = 5, .tDVS = 70,
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+ .tDVH = 6, .tCVS = 70, .tCVH = 6, .tFS_min = 0,
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+ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
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+ .tENV_min = 20, .tSR = 50, .tRFS = 75, .tRP = 160,
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+ .tACK = 20, .tSS = 50, .tDZFS = 80
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+ },
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+ [1] = {
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+ .t2CYC = 156, .tCYC = 75, .tDS = 10, .tDH = 5, .tDVS = 48,
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+ .tDVH = 6, .tCVS = 48, .tCVH = 6, .tFS_min = 0,
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+ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
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+ .tENV_min = 20, .tSR = 30, .tRFS = 70, .tRP = 125,
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+ .tACK = 20, .tSS = 50, .tDZFS = 63
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+ },
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+ [2] = {
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+ .t2CYC = 117, .tCYC = 55, .tDS = 7, .tDH = 5, .tDVS = 34,
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+ .tDVH = 6, .tCVS = 34, .tCVH = 6, .tFS_min = 0,
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+ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
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+ .tENV_min = 20, .tSR = 20, .tRFS = 60, .tRP = 100,
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+ .tACK = 20, .tSS = 50, .tDZFS = 47
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+ },
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+ [3] = {
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+ .t2CYC = 86, .tCYC = 39, .tDS = 7, .tDH = 5, .tDVS = 20,
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+ .tDVH = 6, .tCVS = 20, .tCVH = 6, .tFS_min = 0,
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+ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
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+ .tENV_min = 20, .tSR = 20, .tRFS = 60, .tRP = 100,
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+ .tACK = 20, .tSS = 50, .tDZFS = 35
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+ },
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+ [4] = {
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+ .t2CYC = 57, .tCYC = 25, .tDS = 5, .tDH = 5, .tDVS = 7,
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+ .tDVH = 6, .tCVS = 7, .tCVH = 6, .tFS_min = 0,
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+ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
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+ .tENV_min = 20, .tSR = 50, .tRFS = 60, .tRP = 100,
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+ .tACK = 20, .tSS = 50, .tDZFS = 25
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+ },
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+ [5] = {
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+ .t2CYC = 38, .tCYC = 17, .tDS = 4, .tDH = 5, .tDVS = 5,
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+ .tDVH = 6, .tCVS = 10, .tCVH = 10, .tFS_min = 0,
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+ .tLI_max = 75, .tMLI = 20, .tAZ = 10, .tZAH = 20,
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+ .tENV_min = 20, .tSR = 20, .tRFS = 50, .tRP = 85,
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+ .tACK = 20, .tSS = 50, .tDZFS = 40
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+ },
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+};
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+
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+#define NR_UDMA_SPECS (sizeof udma_specs / sizeof udma_specs[0])
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+
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+struct fsl_ata_time_regs {
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+ u8 time_off, time_on, time_1, time_2w;
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+ u8 time_2r, time_ax, time_pio_rdx, time_4;
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+ u8 time_9, time_m, time_jn, time_d;
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+ u8 time_k, time_ack, time_env, time_rpx;
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+ u8 time_zah, time_mlix, time_dvh, time_dzfs;
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+ u8 time_dvs, time_cvh, time_ss, time_cyc;
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+} __packed;
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+
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+
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+static void update_timing_config(struct fsl_ata_time_regs *tp,
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+ struct ata_host *host)
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+{
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+ u32 __iomem *lp = (u32 __iomem *)tp;
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+ struct pata_fsl_priv *priv = host->private_data;
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+ u32 __iomem *ctlp = (u32 __iomem *)priv->fsl_ata_regs;
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+ int i;
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+
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+ /*
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+ * JKM - this could have endianess issues on BE depending
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+ * on how the controller is glued to the bus -- probably
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+ * should rewrite this to write byte at a time.
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+ */
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+ for (i = 0; i < 6; i++) {
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+ __raw_writel(*lp, ctlp);
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+ lp++;
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+ ctlp++;
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+ }
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+}
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+
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+/*!
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+ * Calculate values for the ATA bus timing registers and store
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+ * them into the hardware.
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+ *
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+ * @param xfer_mode specifies XFER xfer_mode
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+ * @param pdev specifies platform_device
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+ *
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+ * @return EINVAL speed out of range, or illegal mode
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+ */
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+static int set_ata_bus_timing(u8 xfer_mode, struct platform_device *pdev)
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+{
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+ struct fsl_ata_platform_data *plat = (struct fsl_ata_platform_data *)
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+ pdev->dev.platform_data;
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+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
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+
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+ /* get the bus clock cycle time, in ns */
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+ int T = 1 * 1000 * 1000 * 1000 / plat->get_clk_rate();
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+ struct fsl_ata_time_regs tr = {0};
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+ DPRINTK("clk_rate = %d T = %d\n", plat->get_clk_rate(), T);
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+
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+ /*
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+ * every mode gets the same t_off and t_on
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+ */
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+ tr.time_off = 3;
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+ tr.time_on = 3;
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+
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+ if (xfer_mode >= XFER_UDMA_0) {
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+ int speed = xfer_mode - XFER_UDMA_0;
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+ if (speed >= NR_UDMA_SPECS)
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+ return -EINVAL;
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+
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+ tr.time_ack = (udma_specs[speed].tACK + T) / T;
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+ tr.time_env = (udma_specs[speed].tENV_min + T) / T;
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+ tr.time_rpx = (udma_specs[speed].tRP + T) / T + 2;
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+
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+ tr.time_zah = (udma_specs[speed].tZAH + T) / T;
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+ tr.time_mlix = (udma_specs[speed].tMLI + T) / T;
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+ tr.time_dvh = (udma_specs[speed].tDVH + T) / T + 1;
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+ tr.time_dzfs = (udma_specs[speed].tDZFS + T) / T;
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+
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+ tr.time_dvs = (udma_specs[speed].tDVS + T) / T;
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+ tr.time_cvh = (udma_specs[speed].tCVH + T) / T;
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+ tr.time_ss = (udma_specs[speed].tSS + T) / T;
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+ tr.time_cyc = (udma_specs[speed].tCYC + T) / T;
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+ } else if (xfer_mode >= XFER_MW_DMA_0) {
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+ int speed = xfer_mode - XFER_MW_DMA_0;
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+ if (speed >= NR_MDMA_SPECS)
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+ return -EINVAL;
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+
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+ tr.time_m = (mdma_specs[speed].tM + T) / T;
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+ tr.time_jn = (mdma_specs[speed].tJNH + T) / T;
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+ tr.time_d = (mdma_specs[speed].tD + T) / T;
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+
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+ tr.time_k = (mdma_specs[speed].tKW + T) / T;
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+ } else {
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+ int speed = xfer_mode - XFER_PIO_0;
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+ if (speed >= NR_PIO_SPECS)
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+ return -EINVAL;
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+
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+ tr.time_1 = (pio_specs[speed].t1 + T) / T;
|
|
+ tr.time_2w = (pio_specs[speed].t2_8 + T) / T;
|
|
+
|
|
+ tr.time_2r = (pio_specs[speed].t2_8 + T) / T;
|
|
+ tr.time_ax = (pio_specs[speed].tA + T) / T + 2;
|
|
+ tr.time_pio_rdx = 1;
|
|
+ tr.time_4 = (pio_specs[speed].t4 + T) / T;
|
|
+
|
|
+ tr.time_9 = (pio_specs[speed].t9 + T) / T;
|
|
+ }
|
|
+
|
|
+ update_timing_config(&tr, host);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void pata_fsl_set_piomode(struct ata_port *ap, struct ata_device *adev)
|
|
+{
|
|
+ set_ata_bus_timing(adev->pio_mode, to_platform_device(ap->dev));
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+static void pata_fsl_set_dmamode(struct ata_port *ap, struct ata_device *adev)
|
|
+{
|
|
+ struct pata_fsl_priv *priv = ap->host->private_data;
|
|
+
|
|
+ priv->ultra = adev->dma_mode >= XFER_UDMA_0;
|
|
+
|
|
+ set_ata_bus_timing(adev->dma_mode, to_platform_device(ap->dev));
|
|
+}
|
|
+#endif
|
|
+
|
|
+static int pata_fsl_port_start(struct ata_port *ap)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+
|
|
+static irqreturn_t dma_callback(int channel, void *arg)
|
|
+{
|
|
+ struct ata_port *ap = arg;
|
|
+ struct pata_fsl_priv *priv = ap->host->private_data;
|
|
+ u8 __iomem *ata_regs = priv->fsl_ata_regs;
|
|
+
|
|
+ mcf_edma_stop_transfer(channel);
|
|
+ priv->dma_done = 1;
|
|
+ /*
|
|
+ * DMA is finished, so unmask INTRQ from the drive to allow the
|
|
+ * normal ISR to fire.
|
|
+ */
|
|
+#if 0
|
|
+ __raw_writel(FSL_ATA_INTR_ATA_INTRQ2, ata_regs + FSL_ATA_INT_EN);
|
|
+#else
|
|
+ WRITE_ATA8(FSL_ATA_INTR_ATA_INTRQ2, FSL_ATA_INT_EN);
|
|
+ WRITE_ATA8(FSL_ATA_CTRL_ATA_RST_B, FSL_ATA_CONTROL);
|
|
+#endif
|
|
+
|
|
+ return IRQ_HANDLED;
|
|
+}
|
|
+
|
|
+static void pata_fsl_bmdma_setup(struct ata_queued_cmd *qc)
|
|
+{
|
|
+ int chan;
|
|
+ int dma_ultra;
|
|
+ u8 ata_control;
|
|
+ struct ata_port *ap = qc->ap;
|
|
+ struct pata_fsl_priv *priv = ap->host->private_data;
|
|
+ u8 __iomem *ata_regs = priv->fsl_ata_regs;
|
|
+#if 0
|
|
+ struct scatterlist *sg;
|
|
+ struct fsl_edma_requestbuf *pbuf;
|
|
+ unsigned int si;
|
|
+#endif
|
|
+ DPRINTK("ENTER\n");
|
|
+
|
|
+ /* reset the ATA FIFO first */
|
|
+ /*
|
|
+ WRITE_ATA8(FSL_ATA_CTRL_ATA_RST_B,FSL_ATA_CONTROL);
|
|
+ */
|
|
+ priv->dma_dir = qc->dma_dir;
|
|
+
|
|
+ /*
|
|
+ * Configure the on-chip ATA interface hardware.
|
|
+ */
|
|
+ dma_ultra = priv->ultra ?
|
|
+ FSL_ATA_CTRL_DMA_ULTRA : 0;
|
|
+
|
|
+ ata_control = FSL_ATA_CTRL_FIFO_RST_B |
|
|
+ FSL_ATA_CTRL_ATA_RST_B |
|
|
+ FSL_ATA_CTRL_DMA_PENDING |
|
|
+ dma_ultra;
|
|
+
|
|
+ if (qc->dma_dir == DMA_TO_DEVICE) {
|
|
+ chan = priv->dma_wchan;
|
|
+ ata_control |= FSL_ATA_CTRL_FIFO_TX_EN |
|
|
+ FSL_ATA_CTRL_DMA_WRITE;
|
|
+ } else {
|
|
+ chan = priv->dma_rchan;
|
|
+ ata_control |= FSL_ATA_CTRL_FIFO_RCV_EN;
|
|
+ }
|
|
+#if 0
|
|
+ __raw_writel(ata_control, ata_regs + FSL_ATA_CONTROL);
|
|
+ __raw_writel(plat->fifo_alarm, ata_regs + FSL_ATA_FIFO_ALARM);
|
|
+ __raw_writel(FSL_ATA_INTR_ATA_INTRQ1, ata_regs + FSL_ATA_INT_EN);
|
|
+#else
|
|
+ WRITE_ATA8(ata_control, FSL_ATA_CONTROL);
|
|
+ WRITE_ATA8(16/*plat->fifo_alarm*/, FSL_ATA_FIFO_ALARM);
|
|
+ WRITE_ATA8(FSL_ATA_INTR_ATA_INTRQ1, FSL_ATA_INT_EN);
|
|
+#endif
|
|
+ /*mb();*/
|
|
+
|
|
+ /*
|
|
+ * Set up the DMA completion callback.
|
|
+ */
|
|
+ /*
|
|
+ * Copy the sg list to an array.
|
|
+ */
|
|
+#if 0
|
|
+ priv->nsg = 0;
|
|
+ pbuf = priv->reqbuf;
|
|
+
|
|
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
+
|
|
+ /*dma_map_sg(NULL, sg, 1, priv->dma_dir); */
|
|
+
|
|
+ if (priv->dma_dir == DMA_TO_DEVICE) { /* WRITE */
|
|
+ pbuf->saddr = sg->dma_address;
|
|
+ pbuf->daddr = (dma_addr_t)(priv->fsl_ata_regs + 0x18);
|
|
+ pbuf->soff = 4;
|
|
+ pbuf->doff = 0;
|
|
+ } else { /* Read */
|
|
+ pbuf->daddr = sg->dma_address;
|
|
+ pbuf->saddr = (dma_addr_t)(priv->fsl_ata_regs + 0x18);
|
|
+ pbuf->doff = 4;
|
|
+ pbuf->soff = 0;
|
|
+ }
|
|
+ pbuf->attr = MCF_EDMA_TCD_ATTR_SSIZE_32BIT
|
|
+ |MCF_EDMA_TCD_ATTR_DSIZE_32BIT;
|
|
+ pbuf->minor_loop = 16*4; /* 16 longwords per request*/
|
|
+ pbuf->len = sg_dma_len(sg);
|
|
+
|
|
+ pbuf++;
|
|
+ priv->nsg++;
|
|
+ }
|
|
+
|
|
+ BUG_ON(*(unsigned char *)(ata_regs + FSL_ATA_FIFO_FILL));
|
|
+ mcf_edma_sg_config(chan, priv->reqbuf, priv->nsg);
|
|
+#else
|
|
+ if (priv->dma_dir == DMA_TO_DEVICE) {
|
|
+ mcf_edma_sglist_config(chan, qc->sg, qc->n_elem, priv->dma_dir,
|
|
+ (dma_addr_t)
|
|
+ ((io_ata_virt2phys((void *)priv->fsl_ata_regs)) + 0x18),
|
|
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT
|
|
+ | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
|
|
+ 4, 0, 8*4);
|
|
+ } else {
|
|
+
|
|
+ mcf_edma_sglist_config(chan, qc->sg, qc->n_elem, priv->dma_dir,
|
|
+ (dma_addr_t)
|
|
+ ((io_ata_virt2phys((void *)priv->fsl_ata_regs)) + 0x18),
|
|
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT
|
|
+ | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
|
|
+ 0, 4, 8*4);
|
|
+ }
|
|
+
|
|
+#endif
|
|
+ priv->dma_done = 0;
|
|
+
|
|
+ DPRINTK("EXIT\n");
|
|
+
|
|
+}
|
|
+
|
|
+static void pata_fsl_bmdma_start(struct ata_queued_cmd *qc)
|
|
+{
|
|
+ struct ata_port *ap = qc->ap;
|
|
+ struct pata_fsl_priv *priv = ap->host->private_data;
|
|
+ int chan;
|
|
+
|
|
+ /*
|
|
+ * Start the channel.
|
|
+ */
|
|
+ chan = qc->dma_dir == DMA_TO_DEVICE ? priv->dma_wchan : priv->dma_rchan;
|
|
+
|
|
+ mcf_edma_enable_transfer(chan);
|
|
+
|
|
+ ap->ops->sff_exec_command(ap, &qc->tf);
|
|
+}
|
|
+
|
|
+static void pata_fsl_bmdma_stop(struct ata_queued_cmd *qc)
|
|
+{
|
|
+ struct ata_port *ap = qc->ap;
|
|
+/*
|
|
+ int chan;
|
|
+
|
|
+ chan = qc->dma_dir == DMA_TO_DEVICE ? priv->dma_wchan : priv->dma_rchan;
|
|
+ mcf_edma_stop_transfer(chan);
|
|
+*/
|
|
+/* do a dummy read as in ata_bmdma_stop */
|
|
+ ata_sff_dma_pause(ap);
|
|
+}
|
|
+
|
|
+static u8 pata_fsl_bmdma_status(struct ata_port *ap)
|
|
+{
|
|
+ struct pata_fsl_priv *priv = ap->host->private_data;
|
|
+
|
|
+ return priv->dma_done ? ATA_DMA_INTR : 0;
|
|
+}
|
|
+
|
|
+static void pata_fsl_dma_init(struct ata_port *ap)
|
|
+{
|
|
+ struct pata_fsl_priv *priv = ap->host->private_data;
|
|
+
|
|
+ priv->dma_rchan = -1;
|
|
+ priv->dma_wchan = -1;
|
|
+
|
|
+ priv->dma_rchan = mcf_edma_request_channel(MCF_EDMA_CHAN_ATA_RX,
|
|
+ dma_callback,
|
|
+ NULL, 0x6,
|
|
+ (void *)ap,
|
|
+ NULL,
|
|
+ "MCF ATA RX");
|
|
+ if (priv->dma_rchan < 0) {
|
|
+ dev_printk(KERN_ERR, ap->dev, "couldn't get RX DMA channel\n");
|
|
+ goto err_out;
|
|
+ }
|
|
+
|
|
+ priv->dma_wchan = mcf_edma_request_channel(MCF_EDMA_CHAN_ATA_TX,
|
|
+ dma_callback,
|
|
+ NULL, 0x6,
|
|
+ (void *)ap,
|
|
+ NULL,
|
|
+ "MCF ATA TX");
|
|
+ if (priv->dma_wchan < 0) {
|
|
+ dev_printk(KERN_ERR, ap->dev, "couldn't get TX DMA channel\n");
|
|
+ goto err_out;
|
|
+ }
|
|
+
|
|
+ dev_printk(KERN_ERR, ap->dev, "rchan=%d wchan=%d\n", priv->dma_rchan,
|
|
+ priv->dma_wchan);
|
|
+ return;
|
|
+
|
|
+err_out:
|
|
+ ap->mwdma_mask = 0;
|
|
+ ap->udma_mask = 0;
|
|
+ mcf_edma_free_channel(priv->dma_rchan, ap);
|
|
+ mcf_edma_free_channel(priv->dma_wchan, ap);
|
|
+ kfree(priv);
|
|
+}
|
|
+#endif /* CONFIG_FSL_PATA_USE_DMA */
|
|
+
|
|
+static void ata_dummy_noret(struct ata_port *ap) { return; }
|
|
+
|
|
+static struct scsi_host_template pata_fsl_sht = {
|
|
+ ATA_BMDMA_SHT(DRV_NAME),
|
|
+
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ .sg_tablesize = MAX_FSL_SG,
|
|
+ .dma_boundary = ATA_DMA_BOUNDARY,
|
|
+#endif
|
|
+};
|
|
+
|
|
+static struct ata_port_operations pata_fsl_port_ops = {
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ .inherits = &ata_bmdma_port_ops,
|
|
+#else
|
|
+ .inherits = &ata_sff_port_ops,
|
|
+#endif
|
|
+ .set_piomode = pata_fsl_set_piomode,
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ .set_dmamode = pata_fsl_set_dmamode,
|
|
+#endif
|
|
+ .cable_detect = ata_cable_40wire,
|
|
+
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ .bmdma_setup = pata_fsl_bmdma_setup,
|
|
+ .bmdma_start = pata_fsl_bmdma_start,
|
|
+#endif
|
|
+
|
|
+ .sff_data_xfer = ata_sff_data_xfer_noirq,
|
|
+ .qc_prep = ata_noop_qc_prep,
|
|
+
|
|
+ .port_start = pata_fsl_port_start,
|
|
+
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ .bmdma_stop = pata_fsl_bmdma_stop,
|
|
+ .bmdma_status = pata_fsl_bmdma_status,
|
|
+#endif
|
|
+};
|
|
+
|
|
+static void fsl_setup_port(struct ata_ioports *ioaddr)
|
|
+{
|
|
+ unsigned int shift = 2;
|
|
+
|
|
+ ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
|
|
+ ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
|
|
+ ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
|
|
+ ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
|
|
+ ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
|
|
+ ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
|
|
+ ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
|
|
+ ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
|
|
+ ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
|
|
+ ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pata_fsl_probe - attach a platform interface
|
|
+ * @pdev: platform device
|
|
+ *
|
|
+ * Register a platform bus integrated ATA host controller
|
|
+ *
|
|
+ * The 3 platform device resources are used as follows:
|
|
+ *
|
|
+ * - I/O Base (IORESOURCE_MEM) virt. addr. of ATA controller regs
|
|
+ * - CTL Base (IORESOURCE_MEM) unused
|
|
+ * - IRQ (IORESOURCE_IRQ) platform IRQ assigned to ATA
|
|
+ *
|
|
+ */
|
|
+static int __devinit pata_fsl_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct resource *io_res;
|
|
+ struct ata_host *host;
|
|
+ struct ata_port *ap;
|
|
+ struct fsl_ata_platform_data *plat = (struct fsl_ata_platform_data *)
|
|
+ pdev->dev.platform_data;
|
|
+ struct pata_fsl_priv *priv;
|
|
+ u8 *ata_regs;
|
|
+ int ret;
|
|
+
|
|
+ DPRINTK("ENTER\n");
|
|
+ /*
|
|
+ * Get an ata_host structure for this device
|
|
+ */
|
|
+ host = ata_host_alloc(&pdev->dev, 1);
|
|
+ if (!host)
|
|
+ return -ENOMEM;
|
|
+ ap = host->ports[0];
|
|
+ /*
|
|
+ * Allocate private data
|
|
+ */
|
|
+ priv = kzalloc(sizeof(struct pata_fsl_priv), GFP_KERNEL);
|
|
+ if (priv == NULL) {
|
|
+ /* free(host); */
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+ host->private_data = priv;
|
|
+
|
|
+ /*
|
|
+ * Set up resources
|
|
+ */
|
|
+ if (unlikely(pdev->num_resources != 3)) {
|
|
+ dev_err(&pdev->dev, "invalid number of resources\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
+ ata_regs = (u8 *)io_res->start;
|
|
+ priv->fsl_ata_regs = ata_regs;
|
|
+ ap->ioaddr.cmd_addr = (void *)(ata_regs + FSL_ATA_DRIVE_DATA);
|
|
+ ap->ioaddr.ctl_addr = (void *)(ata_regs + FSL_ATA_DRIVE_CONTROL);
|
|
+ ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
|
|
+ ap->ops = &pata_fsl_port_ops;
|
|
+ ap->pio_mask = 0x3F;
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ ap->mwdma_mask = 0x07;
|
|
+ ap->udma_mask = 0x1F;
|
|
+/* ap->udma_mask = plat->udma_mask; */
|
|
+/* pata_fsl_sht.sg_tablesize = plat->max_sg; */
|
|
+#else
|
|
+ ap->mwdma_mask = 0x00;
|
|
+ ap->udma_mask = 0x00;
|
|
+#endif
|
|
+ fsl_setup_port(&ap->ioaddr);
|
|
+
|
|
+ /*
|
|
+ * Do platform-specific initialization (e.g. allocate pins,
|
|
+ * turn on clock). After this call it is assumed that
|
|
+ * plat->get_clk_rate() can be called to calculate
|
|
+ * timing.
|
|
+ */
|
|
+ if (plat->init && plat->init(pdev)) {
|
|
+ /* REVISIT: don't leak what ata_host_alloc() allocated */
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ /* Deassert the reset bit to enable the interface */
|
|
+ WRITE_ATA8(FSL_ATA_CTRL_ATA_RST_B, FSL_ATA_CONTROL);
|
|
+
|
|
+ /* Set initial timing and mode */
|
|
+ set_ata_bus_timing(XFER_PIO_4, pdev);
|
|
+
|
|
+#ifdef CONFIG_FSL_PATA_USE_DMA
|
|
+ /* get DMA ready */
|
|
+ pata_fsl_dma_init(ap);
|
|
+#endif
|
|
+
|
|
+ /*
|
|
+ * Enable the ATA INTRQ interrupt from the bus, but
|
|
+ * only allow the CPU to see it (INTRQ2) at this point.
|
|
+ * INTRQ1, which goes to the DMA, will be enabled later.
|
|
+ */
|
|
+#if 0
|
|
+ __raw_writel(FSL_ATA_INTR_ATA_INTRQ2, ata_regs + FSL_ATA_INT_EN);
|
|
+#else
|
|
+ WRITE_ATA8(FSL_ATA_INTR_ATA_INTRQ2, FSL_ATA_INT_EN);
|
|
+#endif
|
|
+
|
|
+ /* activate */
|
|
+ ret = ata_host_activate(host, platform_get_irq(pdev, 0),
|
|
+ ata_sff_interrupt, 0, &pata_fsl_sht);
|
|
+ DPRINTK("EXIT ret=%d\n", ret);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pata_fsl_remove - unplug a platform interface
|
|
+ * @pdev: platform device
|
|
+ *
|
|
+ * A platform bus ATA device has been unplugged. Perform the needed
|
|
+ * cleanup. Also called on module unload for any active devices.
|
|
+ */
|
|
+static int __devexit pata_fsl_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct device *dev = &pdev->dev;
|
|
+ struct ata_host *host = dev_get_drvdata(dev);
|
|
+ struct pata_fsl_priv *priv = host->private_data;
|
|
+ struct fsl_ata_platform_data *plat = (struct fsl_ata_platform_data *)
|
|
+ pdev->dev.platform_data;
|
|
+ u8 *ata_regs = priv->fsl_ata_regs;
|
|
+
|
|
+#if 0
|
|
+ __raw_writel(0, ata_regs + FSL_ATA_INT_EN); /* Disable interrupts */
|
|
+#else
|
|
+ WRITE_ATA8(0, FSL_ATA_INT_EN); /* Disable interrupts */
|
|
+#endif
|
|
+
|
|
+ ata_host_detach(host);
|
|
+
|
|
+ if (plat->exit)
|
|
+ plat->exit();
|
|
+
|
|
+ kfree(priv);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_PM
|
|
+static int pata_fsl_suspend(struct platform_device *pdev, pm_message_t state)
|
|
+{
|
|
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
+ struct pata_fsl_priv *priv = host->private_data;
|
|
+ struct fsl_ata_platform_data *plat = (struct fsl_ata_platform_data *)
|
|
+ pdev->dev.platform_data;
|
|
+ u8 *ata_regs = priv->fsl_ata_regs;
|
|
+
|
|
+ /* Disable interrupts. */
|
|
+#if 0
|
|
+ __raw_writel(0, ata_regs + FSL_ATA_INT_EN);
|
|
+#else
|
|
+ WRITE_ATA8(0, FSL_ATA_INT_EN);
|
|
+#endif
|
|
+
|
|
+ if (plat->exit)
|
|
+ plat->exit();
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int pata_fsl_resume(struct platform_device *pdev)
|
|
+{
|
|
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
+ struct pata_fsl_priv *priv = host->private_data;
|
|
+ struct fsl_ata_platform_data *plat = (struct fsl_ata_platform_data *)
|
|
+ pdev->dev.platform_data;
|
|
+ u8 *ata_regs = priv->fsl_ata_regs;
|
|
+
|
|
+ if (plat->init && plat->init(pdev))
|
|
+ return -ENODEV;
|
|
+ /* Deassert the reset bit to enable the interface */
|
|
+#if 0
|
|
+ __raw_writel(FSL_ATA_CTRL_ATA_RST_B, ata_regs + FSL_ATA_CONTROL);
|
|
+#else
|
|
+ WRITE_ATA8(FSL_ATA_CTRL_ATA_RST_B, FSL_ATA_CONTROL);
|
|
+#endif
|
|
+
|
|
+ /* Set initial timing and mode */
|
|
+ set_ata_bus_timing(XFER_PIO_4, pdev);
|
|
+
|
|
+ /*
|
|
+ * Enable hardware interrupts.
|
|
+ */
|
|
+#if 0
|
|
+ __raw_writel(FSL_ATA_INTR_ATA_INTRQ2, ata_regs + FSL_ATA_INT_EN);
|
|
+#else
|
|
+ WRITE_ATA8(FSL_ATA_INTR_ATA_INTRQ2, FSL_ATA_INT_EN);
|
|
+#endif
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
+static struct platform_driver pata_fsl_driver = {
|
|
+ .probe = pata_fsl_probe,
|
|
+ .remove = __devexit_p(pata_fsl_remove),
|
|
+#ifdef CONFIG_PM
|
|
+ .suspend = pata_fsl_suspend,
|
|
+ .resume = pata_fsl_resume,
|
|
+#endif
|
|
+ .driver = {
|
|
+ .name = DRV_NAME,
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+};
|
|
+
|
|
+static int __init pata_fsl_init(void)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ DPRINTK("ENTER\n");
|
|
+ ret = platform_driver_register(&pata_fsl_driver);
|
|
+ DPRINTK("EXIT ret=%d\n", ret);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static void __exit pata_fsl_exit(void)
|
|
+{
|
|
+ platform_driver_unregister(&pata_fsl_driver);
|
|
+}
|
|
+module_init(pata_fsl_init);
|
|
+module_exit(pata_fsl_exit);
|
|
+
|
|
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
|
|
+MODULE_DESCRIPTION("low-level driver for Freescale ATA");
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_VERSION(DRV_VERSION);
|