aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/coldfire/patches/037-Add-ColdFire-MCF54455-PATA-interface-support.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/coldfire/patches/037-Add-ColdFire-MCF54455-PATA-interface-support.patch')
-rw-r--r--target/linux/coldfire/patches/037-Add-ColdFire-MCF54455-PATA-interface-support.patch934
1 files changed, 934 insertions, 0 deletions
diff --git a/target/linux/coldfire/patches/037-Add-ColdFire-MCF54455-PATA-interface-support.patch b/target/linux/coldfire/patches/037-Add-ColdFire-MCF54455-PATA-interface-support.patch
new file mode 100644
index 0000000000..730086eba1
--- /dev/null
+++ b/target/linux/coldfire/patches/037-Add-ColdFire-MCF54455-PATA-interface-support.patch
@@ -0,0 +1,934 @@
+From 8e46c06091fd87904205a977be3c784e3ac61e95 Mon Sep 17 00:00:00 2001
+From: Jingchang Lu <b35083@freescale.com>
+Date: Thu, 4 Aug 2011 09:59:48 +0800
+Subject: [PATCH 37/52] Add ColdFire MCF54455 PATA interface support
+
+ColdFire MCF54455 parallel ATA controller support
+both uDMA and PIO mode, this driver implements all.
+
+Signed-off-by: Jingchang Lu <b35083@freescale.com>
+---
+ arch/m68k/include/asm/pata_fsl.h | 17 +
+ drivers/ata/Kconfig | 23 +-
+ drivers/ata/Makefile | 1 +
+ drivers/ata/pata_fsl.c | 844 ++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 884 insertions(+), 1 deletions(-)
+ create mode 100644 arch/m68k/include/asm/pata_fsl.h
+ create mode 100644 drivers/ata/pata_fsl.c
+
+--- /dev/null
++++ b/arch/m68k/include/asm/pata_fsl.h
+@@ -0,0 +1,17 @@
++/*
++ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file COPYING in the main directory of this archive
++ * for more details.
++ */
++
++#ifndef _ASM_M68K_PATA_FSL_H
++#define _ASM_M68K_PATA_FSL_H
++
++/* ATA mapped IO address translate function */
++extern unsigned int io_ata_virt2phys(void *x);
++extern void *io_ata_phys2virt(unsigned int x);
++
++
++#endif
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -14,7 +14,7 @@ menuconfig ATA
+ tristate "Serial ATA and Parallel ATA drivers"
+ depends on HAS_IOMEM
+ depends on BLOCK
+- depends on !(M32R || M68K) || BROKEN
++ depends on !(M32R) || BROKEN
+ select SCSI
+ ---help---
+ If you want to use a ATA hard disk, ATA tape drive, ATA CD-ROM or
+@@ -687,6 +687,27 @@ config PATA_WINBOND
+
+ If unsure, say N.
+
++config PATA_FSL
++ tristate "Freescale on-chip PATA support"
++ depends on (ARCH_MX3 || ARCH_MX27 || PPC_512x || M54455)
++ help
++ Some Freescale processors SOC have parallel ATA controller,
++ such as ColdFire MCF54455.
++
++ Say Y here if you wish to use the on-chip ATA interface.
++
++ If you are unsure, say N to this.
++
++config FSL_PATA_USE_DMA
++ bool "Freescale PATA eDMA support"
++ depends on PATA_FSL && COLDFIRE_EDMA
++ default y
++ help
++ This option enables the uDMA support over PATA interface
++ which can improve performance than PIO mode for read and write.
++
++ If unsure, say Y.
++
+ endif # ATA_BMDMA
+
+ comment "PIO-only SFF controllers"
+--- a/drivers/ata/Makefile
++++ b/drivers/ata/Makefile
+@@ -72,6 +72,7 @@ obj-$(CONFIG_PATA_TOSHIBA) += pata_picco
+ obj-$(CONFIG_PATA_TRIFLEX) += pata_triflex.o
+ obj-$(CONFIG_PATA_VIA) += pata_via.o
+ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
++obj-$(CONFIG_PATA_FSL) += pata_fsl.o
+
+ # SFF PIO only
+ obj-$(CONFIG_PATA_AT32) += pata_at32.o
+--- /dev/null
++++ b/drivers/ata/pata_fsl.c
+@@ -0,0 +1,844 @@
++/*
++ * Freescale integrated PATA driver
++ *
++ * Copyright (C) 2007-2011 Freescale Semiconductor, Inc. All Rights Reserved.
++ *
++ * Description:
++ * This driver is for Coldfire MCF54455 on-chip ATA module.
++ *
++ * This is free software; you can redistribute it and/or modify it
++ * under the GNU General Public License as published by the Free
++ * Software Foundation; either version 2 of the License, or (at
++ * your option) any later version.
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/blkdev.h>
++#include <scsi/scsi_host.h>
++#include <linux/ata.h>
++#include <linux/libata.h>
++#include <linux/platform_device.h>
++#include <linux/fsl_devices.h>
++#ifdef CONFIG_FSL_PATA_USE_DMA
++#include <asm/mcf_edma.h>
++#endif
++#include <asm/pata_fsl.h>
++
++#define DRV_NAME "pata_fsl"
++#define DRV_VERSION "1.0"
++
++#ifdef CONFIG_M54455
++#define WRITE_ATA8(val, reg) \
++ __raw_writeb(val, (ata_regs + reg));
++#define WRITE_ATA16(val, reg) \
++ __raw_writew(val, (ata_regs + reg));
++#else
++#define WRITE_ATA8(val, reg) \
++ __raw_writel(val, (ata_regs + reg));
++#define WRITE_ATA16(val, reg) \
++ __raw_writel(val, (ata_regs + reg));
++#endif
++
++#define MAX_FSL_SG 256 /* MCF_EDMA_TCD_PER_CHAN */
++
++struct pata_fsl_priv {
++#ifdef CONFIG_FSL_PATA_USE_DMA
++ int ultra;
++#endif
++ u8 *fsl_ata_regs;
++#ifdef CONFIG_FSL_PATA_USE_DMA
++ int dma_rchan;
++ int dma_wchan;
++ int dma_done;
++ int dma_dir;
++#if 0
++ int nsg;
++ struct fsl_edma_requestbuf reqbuf[MAX_FSL_SG];
++#endif
++#endif
++};
++
++enum {
++ /* various constants */
++
++#ifdef CONFIG_FSL_PATA_USE_DMA
++ FSL_ATA_MAX_SG_LEN = 65534,
++#endif
++
++ /* offsets to registers */
++
++ FSL_ATA_TIMING_REGS = 0x00,
++ FSL_ATA_FIFO_FILL = 0x20,
++ FSL_ATA_CONTROL = 0x24,
++ FSL_ATA_INT_PEND = 0x28,
++ FSL_ATA_INT_EN = 0x2C,
++ FSL_ATA_INT_CLEAR = 0x30,
++ FSL_ATA_FIFO_ALARM = 0x34,
++ FSL_ATA_DRIVE_DATA = 0xA0,
++ FSL_ATA_DRIVE_CONTROL = 0xD8,
++
++ /* bits within FSL_ATA_CONTROL */
++
++ FSL_ATA_CTRL_FIFO_RST_B = 0x80,
++ FSL_ATA_CTRL_ATA_RST_B = 0x40,
++ FSL_ATA_CTRL_FIFO_TX_EN = 0x20,
++ FSL_ATA_CTRL_FIFO_RCV_EN = 0x10,
++ FSL_ATA_CTRL_DMA_PENDING = 0x08,
++ FSL_ATA_CTRL_DMA_ULTRA = 0x04,
++ FSL_ATA_CTRL_DMA_WRITE = 0x02,
++ FSL_ATA_CTRL_IORDY_EN = 0x01,
++
++ /* bits within the interrupt control registers */
++
++ FSL_ATA_INTR_ATA_INTRQ1 = 0x80,
++ FSL_ATA_INTR_FIFO_UNDERFLOW = 0x40,
++ FSL_ATA_INTR_FIFO_OVERFLOW = 0x20,
++ FSL_ATA_INTR_CTRL_IDLE = 0x10,
++ FSL_ATA_INTR_ATA_INTRQ2 = 0x08,
++};
++
++/*
++ * This structure contains the timing parameters for
++ * ATA bus timing in the 5 PIO modes. The timings
++ * are in nanoseconds, and are converted to clock
++ * cycles before being stored in the ATA controller
++ * timing registers.
++ */
++static struct {
++ short t0, t1, t2_8, t2_16, t2i, t4, t9, tA;
++} pio_specs[] = {
++ [0] = {
++ .t0 = 600, .t1 = 70, .t2_8 = 290, .t2_16 = 165, .t2i = 0,
++ .t4 = 30, .t9 = 20, .tA = 50
++ },
++ [1] = {
++ .t0 = 383, .t1 = 50, .t2_8 = 290, .t2_16 = 125, .t2i = 0,
++ .t4 = 20, .t9 = 15, .tA = 50
++ },
++ [2] = {
++ .t0 = 240, .t1 = 30, .t2_8 = 290, .t2_16 = 100, .t2i = 0,
++ .t4 = 15, .t9 = 10, .tA = 50
++ },
++ [3] = {
++ .t0 = 180, .t1 = 30, .t2_8 = 80, .t2_16 = 80, .t2i = 0,
++ .t4 = 10, .t9 = 10, .tA = 50
++ },
++ [4] = {
++ .t0 = 120, .t1 = 25, .t2_8 = 70, .t2_16 = 70, .t2i = 0,
++ .t4 = 10, .t9 = 10, .tA = 50
++ },
++};
++
++#define NR_PIO_SPECS (sizeof pio_specs / sizeof pio_specs[0])
++
++/*
++ * This structure contains the timing parameters for
++ * ATA bus timing in the 3 MDMA modes. The timings
++ * are in nanoseconds, and are converted to clock
++ * cycles before being stored in the ATA controller
++ * timing registers.
++ */
++static struct {
++ short t0M, tD, tH, tJ, tKW, tM, tN, tJNH;
++} mdma_specs[] = {
++ [0] = {
++ .t0M = 480, .tD = 215, .tH = 20, .tJ = 20, .tKW = 215,
++ .tM = 50, .tN = 15, .tJNH = 20
++ },
++ [1] = {
++ .t0M = 150, .tD = 80, .tH = 15, .tJ = 5, .tKW = 50,
++ .tM = 30, .tN = 10, .tJNH = 15
++ },
++ [2] = {
++ .t0M = 120, .tD = 70, .tH = 10, .tJ = 5, .tKW = 25,
++ .tM = 25, .tN = 10, .tJNH = 10
++ },
++};
++
++#define NR_MDMA_SPECS (sizeof mdma_specs / sizeof mdma_specs[0])
++
++/*
++ * This structure contains the timing parameters for
++ * ATA bus timing in the 6 UDMA modes. The timings
++ * are in nanoseconds, and are converted to clock
++ * cycles before being stored in the ATA controller
++ * timing registers.
++ */
++static struct {
++ short t2CYC, tCYC, tDS, tDH, tDVS, tDVH, tCVS, tCVH, tFS_min, tLI_max,
++ tMLI, tAZ, tZAH, tENV_min, tSR, tRFS, tRP, tACK, tSS, tDZFS;
++} udma_specs[] = {
++ [0] = {
++ .t2CYC = 235, .tCYC = 114, .tDS = 15, .tDH = 5, .tDVS = 70,
++ .tDVH = 6, .tCVS = 70, .tCVH = 6, .tFS_min = 0,
++ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
++ .tENV_min = 20, .tSR = 50, .tRFS = 75, .tRP = 160,
++ .tACK = 20, .tSS = 50, .tDZFS = 80
++ },
++ [1] = {
++ .t2CYC = 156, .tCYC = 75, .tDS = 10, .tDH = 5, .tDVS = 48,
++ .tDVH = 6, .tCVS = 48, .tCVH = 6, .tFS_min = 0,
++ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
++ .tENV_min = 20, .tSR = 30, .tRFS = 70, .tRP = 125,
++ .tACK = 20, .tSS = 50, .tDZFS = 63
++ },
++ [2] = {
++ .t2CYC = 117, .tCYC = 55, .tDS = 7, .tDH = 5, .tDVS = 34,
++ .tDVH = 6, .tCVS = 34, .tCVH = 6, .tFS_min = 0,
++ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
++ .tENV_min = 20, .tSR = 20, .tRFS = 60, .tRP = 100,
++ .tACK = 20, .tSS = 50, .tDZFS = 47
++ },
++ [3] = {
++ .t2CYC = 86, .tCYC = 39, .tDS = 7, .tDH = 5, .tDVS = 20,
++ .tDVH = 6, .tCVS = 20, .tCVH = 6, .tFS_min = 0,
++ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
++ .tENV_min = 20, .tSR = 20, .tRFS = 60, .tRP = 100,
++ .tACK = 20, .tSS = 50, .tDZFS = 35
++ },
++ [4] = {
++ .t2CYC = 57, .tCYC = 25, .tDS = 5, .tDH = 5, .tDVS = 7,
++ .tDVH = 6, .tCVS = 7, .tCVH = 6, .tFS_min = 0,
++ .tLI_max = 100, .tMLI = 20, .tAZ = 10, .tZAH = 20,
++ .tENV_min = 20, .tSR = 50, .tRFS = 60, .tRP = 100,
++ .tACK = 20, .tSS = 50, .tDZFS = 25
++ },
++ [5] = {
++ .t2CYC = 38, .tCYC = 17, .tDS = 4, .tDH = 5, .tDVS = 5,
++ .tDVH = 6, .tCVS = 10, .tCVH = 10, .tFS_min = 0,
++ .tLI_max = 75, .tMLI = 20, .tAZ = 10, .tZAH = 20,
++ .tENV_min = 20, .tSR = 20, .tRFS = 50, .tRP = 85,
++ .tACK = 20, .tSS = 50, .tDZFS = 40
++ },
++};
++
++#define NR_UDMA_SPECS (sizeof udma_specs / sizeof udma_specs[0])
++
++struct fsl_ata_time_regs {
++ u8 time_off, time_on, time_1, time_2w;
++ u8 time_2r, time_ax, time_pio_rdx, time_4;
++ u8 time_9, time_m, time_jn, time_d;
++ u8 time_k, time_ack, time_env, time_rpx;
++ u8 time_zah, time_mlix, time_dvh, time_dzfs;
++ u8 time_dvs, time_cvh, time_ss, time_cyc;
++} __packed;
++
++
++static void update_timing_config(struct fsl_ata_time_regs *tp,
++ struct ata_host *host)
++{
++ u32 __iomem *lp = (u32 __iomem *)tp;
++ struct pata_fsl_priv *priv = host->private_data;
++ u32 __iomem *ctlp = (u32 __iomem *)priv->fsl_ata_regs;
++ int i;
++
++ /*
++ * JKM - this could have endianess issues on BE depending
++ * on how the controller is glued to the bus -- probably
++ * should rewrite this to write byte at a time.
++ */
++ for (i = 0; i < 6; i++) {
++ __raw_writel(*lp, ctlp);
++ lp++;
++ ctlp++;
++ }
++}
++
++/*!
++ * Calculate values for the ATA bus timing registers and store
++ * them into the hardware.
++ *
++ * @param xfer_mode specifies XFER xfer_mode
++ * @param pdev specifies platform_device
++ *
++ * @return EINVAL speed out of range, or illegal mode
++ */
++static int set_ata_bus_timing(u8 xfer_mode, struct platform_device *pdev)
++{
++ struct fsl_ata_platform_data *plat = (struct fsl_ata_platform_data *)
++ pdev->dev.platform_data;
++ struct ata_host *host = dev_get_drvdata(&pdev->dev);
++
++ /* get the bus clock cycle time, in ns */
++ int T = 1 * 1000 * 1000 * 1000 / plat->get_clk_rate();
++ struct fsl_ata_time_regs tr = {0};
++ DPRINTK("clk_rate = %d T = %d\n", plat->get_clk_rate(), T);
++
++ /*
++ * every mode gets the same t_off and t_on
++ */
++ tr.time_off = 3;
++ tr.time_on = 3;
++
++ if (xfer_mode >= XFER_UDMA_0) {
++ int speed = xfer_mode - XFER_UDMA_0;
++ if (speed >= NR_UDMA_SPECS)
++ return -EINVAL;
++
++ tr.time_ack = (udma_specs[speed].tACK + T) / T;
++ tr.time_env = (udma_specs[speed].tENV_min + T) / T;
++ tr.time_rpx = (udma_specs[speed].tRP + T) / T + 2;
++
++ tr.time_zah = (udma_specs[speed].tZAH + T) / T;
++ tr.time_mlix = (udma_specs[speed].tMLI + T) / T;
++ tr.time_dvh = (udma_specs[speed].tDVH + T) / T + 1;
++ tr.time_dzfs = (udma_specs[speed].tDZFS + T) / T;
++
++ tr.time_dvs = (udma_specs[speed].tDVS + T) / T;
++ tr.time_cvh = (udma_specs[speed].tCVH + T) / T;
++ tr.time_ss = (udma_specs[speed].tSS + T) / T;
++ tr.time_cyc = (udma_specs[speed].tCYC + T) / T;
++ } else if (xfer_mode >= XFER_MW_DMA_0) {
++ int speed = xfer_mode - XFER_MW_DMA_0;
++ if (speed >= NR_MDMA_SPECS)
++ return -EINVAL;
++
++ tr.time_m = (mdma_specs[speed].tM + T) / T;
++ tr.time_jn = (mdma_specs[speed].tJNH + T) / T;
++ tr.time_d = (mdma_specs[speed].tD + T) / T;
++
++ tr.time_k = (mdma_specs[speed].tKW + T) / T;
++ } else {
++ int speed = xfer_mode - XFER_PIO_0;
++ if (speed >= NR_PIO_SPECS)
++ return -EINVAL;
++
++ 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 03:48:08 +0000