This is the driver for the Toshiba TX4939 SoC ATA controller.
This controller has standard ATA taskfile registers and DMA
command/status registers, but the register layout is swapped on big
endian. There are some other endian issue and some special registers
which requires many custom dma_ops/tp_ops routines and build_dmatable.
Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
Acked-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
This patch is against current linux-mips tree.
Changes since v5:
* simplify redundant 'dn & 1'
* replace one more magic number with ATA_DMA_XXX symbols
* some whitespace, parenthesis and spelling fixes
drivers/ide/Kconfig | 5 +
drivers/ide/mips/Makefile | 1 +
drivers/ide/mips/tx4939ide.c | 754 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 760 insertions(+), 0 deletions(-)
create mode 100644 drivers/ide/mips/tx4939ide.c
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 74a369a..1f0eeba 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -746,6 +746,11 @@ config BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
default "128"
depends on BLK_DEV_IDE_AU1XXX
+config BLK_DEV_IDE_TX4939
+ tristate "TX4939 internal IDE support"
+ depends on SOC_TX4939
+ select BLK_DEV_IDEDMA_SFF
+
config IDE_ARM
tristate "ARM IDE support"
depends on ARM && (ARCH_CLPS7500 || ARCH_RPC || ARCH_SHARK)
diff --git a/drivers/ide/mips/Makefile b/drivers/ide/mips/Makefile
index 5873fa0..04e5d86 100644
--- a/drivers/ide/mips/Makefile
+++ b/drivers/ide/mips/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_BLK_DEV_IDE_AU1XXX) += au1xxx-ide.o
+obj-$(CONFIG_BLK_DEV_IDE_TX4939) += tx4939ide.o
EXTRA_CFLAGS := -Idrivers/ide
diff --git a/drivers/ide/mips/tx4939ide.c b/drivers/ide/mips/tx4939ide.c
new file mode 100644
index 0000000..bafb7d1
--- /dev/null
+++ b/drivers/ide/mips/tx4939ide.c
@@ -0,0 +1,754 @@
+/*
+ * TX4939 internal IDE driver
+ * Based on RBTX49xx patch from CELF patch archive.
+ *
+ * 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.
+ *
+ * (C) Copyright TOSHIBA CORPORATION 2005-2007
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/scatterlist.h>
+
+#define MODNAME "tx4939ide"
+
+/* ATA Shadow Registers (8-bit except for Data which is 16-bit) */
+#define TX4939IDE_Data 0x000
+#define TX4939IDE_Error_Feature 0x001
+#define TX4939IDE_Sec 0x002
+#define TX4939IDE_LBA0 0x003
+#define TX4939IDE_LBA1 0x004
+#define TX4939IDE_LBA2 0x005
+#define TX4939IDE_DevHead 0x006
+#define TX4939IDE_Stat_Cmd 0x007
+#define TX4939IDE_AltStat_DevCtl 0x402
+/* H/W DMA Registers */
+#define TX4939IDE_DMA_Cmd 0x800 /* 8-bit */
+#define TX4939IDE_DMA_Stat 0x802 /* 8-bit */
+#define TX4939IDE_PRD_Ptr 0x804 /* 32-bit */
+/* ATA100 CORE Registers (16-bit) */
+#define TX4939IDE_Sys_Ctl 0xc00
+#define TX4939IDE_Xfer_Cnt_1 0xc08
+#define TX4939IDE_Xfer_Cnt_2 0xc0a
+#define TX4939IDE_Sec_Cnt 0xc10
+#define TX4939IDE_Start_Lo_Addr 0xc18
+#define TX4939IDE_Start_Up_Addr 0xc20
+#define TX4939IDE_Add_Ctl 0xc28
+#define TX4939IDE_Lo_Burst_Cnt 0xc30
+#define TX4939IDE_Up_Burst_Cnt 0xc38
+#define TX4939IDE_PIO_Addr 0xc88
+#define TX4939IDE_H_Rst_Tim 0xc90
+#define TX4939IDE_Int_Ctl 0xc98
+#define TX4939IDE_Pkt_Cmd 0xcb8
+#define TX4939IDE_Bxfer_Cnt_Hi 0xcc0
+#define TX4939IDE_Bxfer_Cnt_Lo 0xcc8
+#define TX4939IDE_Dev_TErr 0xcd0
+#define TX4939IDE_Pkt_Xfer_Ctl 0xcd8
+#define TX4939IDE_Start_TAddr 0xce0
+
+/* bits for Int_Ctl */
+#define TX4939IDE_INT_ADDRERR 0x80
+#define TX4939IDE_INT_REACHMUL 0x40
+#define TX4939IDE_INT_DEVTIMING 0x20
+#define TX4939IDE_INT_UDMATERM 0x10
+#define TX4939IDE_INT_TIMER 0x08
+#define TX4939IDE_INT_BUSERR 0x04
+#define TX4939IDE_INT_XFEREND 0x02
+#define TX4939IDE_INT_HOST 0x01
+
+#define TX4939IDE_IGNORE_INTS \
+ (TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL | \
+ TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_UDMATERM | \
+ TX4939IDE_INT_TIMER | TX4939IDE_INT_XFEREND)
+
+#ifdef __BIG_ENDIAN
+#define tx4939ide_swizzlel(a) ((a) ^ 4)
+#define tx4939ide_swizzlew(a) ((a) ^ 6)
+#define tx4939ide_swizzleb(a) ((a) ^ 7)
+#else
+#define tx4939ide_swizzlel(a) (a)
+#define tx4939ide_swizzlew(a) (a)
+#define tx4939ide_swizzleb(a) (a)
+#endif
+
+static u16 tx4939ide_readw(void __iomem *base, u32 reg)
+{
+ return __raw_readw(base + tx4939ide_swizzlew(reg));
+}
+static u8 tx4939ide_readb(void __iomem *base, u32 reg)
+{
+ return __raw_readb(base + tx4939ide_swizzleb(reg));
+}
+static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg)
+{
+ __raw_writel(val, base + tx4939ide_swizzlel(reg));
+}
+static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg)
+{
+ __raw_writew(val, base + tx4939ide_swizzlew(reg));
+}
+static void tx4939ide_writeb(u8 val, void __iomem *base, u32 reg)
+{
+ __raw_writeb(val, base + tx4939ide_swizzleb(reg));
+}
+
+#define TX4939IDE_BASE(hwif) ((void __iomem *)(hwif)->extra_base)
+
+static void tx4939ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ int is_slave = drive->dn;
+ u32 mask, val;
+ u8 safe = pio;
+ ide_drive_t *pair;
+
+ pair = ide_get_pair_dev(drive);
+ if (pair)
+ safe = min(safe, ide_get_best_pio_mode(pair, 255, 4));
+ /*
+ * Update Command Transfer Mode for master/slave and Data
+ * Transfer Mode for this drive.
+ */
+ mask = is_slave ? 0x07f00000 : 0x000007f0;
+ val = ((safe << 8) | (pio << 4)) << (is_slave ? 16 : 0);
+ hwif->select_data = (hwif->select_data & ~mask) | val;
+ /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
+}
+
+static void tx4939ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u32 mask, val;
+
+ /* Update Data Transfer Mode for this drive. */
+ if (mode >= XFER_UDMA_0)
+ val = mode - XFER_UDMA_0 + 8;
+ else
+ val = mode - XFER_MW_DMA_0 + 5;
+ if (drive->dn) {
+ mask = 0x00f00000;
+ val <<= 20;
+ } else {
+ mask = 0x000000f0;
+ val <<= 4;
+ }
+ hwif->select_data = (hwif->select_data & ~mask) | val;
+ /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
+}
+
+static u16 tx4939ide_check_error_ints(ide_hwif_t *hwif)
+{
+ void __iomem *base = TX4939IDE_BASE(hwif);
+ u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
+
+ if (ctl & TX4939IDE_INT_BUSERR) {
+ /* reset FIFO */
+ u16 sysctl = tx4939ide_readw(base, TX4939IDE_Sys_Ctl);
+
+ tx4939ide_writew(sysctl | 0x4000, base, TX4939IDE_Sys_Ctl);
+ mmiowb();
+ /* wait 12GBUSCLK (typ. 60ns @ GBUS200MHz, max 270ns) */
+ ndelay(270);
+ tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
+ }
+ if (ctl & (TX4939IDE_INT_ADDRERR |
+ TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR))
+ pr_err("%s: Error interrupt %#x (%s%s%s )\n",
+ hwif->name, ctl,
+ ctl & TX4939IDE_INT_ADDRERR ? " Address-Error" : "",
+ ctl & TX4939IDE_INT_DEVTIMING ? " DEV-Timing" : "",
+ ctl & TX4939IDE_INT_BUSERR ? " Bus-Error" : "");
+ return ctl;
+}
+
+static void tx4939ide_clear_irq(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif;
+ void __iomem *base;
+ u16 ctl;
+
+ /*
+ * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all job
+ * for DMA case.
+ */
+ if (drive->waiting_for_dma)
+ return;
+ hwif = drive->hwif;
+ base = TX4939IDE_BASE(hwif);
+ ctl = tx4939ide_check_error_ints(hwif);
+ tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
+}
+
+static u8 tx4939ide_cable_detect(ide_hwif_t *hwif)
+{
+ void __iomem *base = TX4939IDE_BASE(hwif);
+
+ return tx4939ide_readw(base, TX4939IDE_Sys_Ctl) & 0x2000 ?
+ ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+#ifdef __BIG_ENDIAN
+static void tx4939ide_dma_host_set(ide_drive_t *drive, int on)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 unit = drive->dn;
+ void __iomem *base = TX4939IDE_BASE(hwif);
+ u8 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+
+ if (on)
+ dma_stat |= (1 << (5 + unit));
+ else
+ dma_stat &= ~(1 << (5 + unit));
+
+ tx4939ide_writeb(dma_stat, base, TX4939IDE_DMA_Stat);
+}
+#else
+#define tx4939ide_dma_host_set ide_dma_host_set
+#endif
+
+static u8 tx4939ide_clear_dma_status(void __iomem *base)
+{
+ u8 dma_stat;
+
+ /* read DMA status for INTR & ERROR flags */
+ dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+ /* clear INTR & ERROR flags */
+ tx4939ide_writeb(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, base,
+ TX4939IDE_DMA_Stat);
+ /* recover intmask cleared by writing to bit2 of DMA_Stat */
+ tx4939ide_writew(TX4939IDE_IGNORE_INTS << 8, base, TX4939IDE_Int_Ctl);
+ return dma_stat;
+}
+
+#ifdef __BIG_ENDIAN
+/* custom ide_build_dmatable to handle swapped layout */
+static int tx4939ide_build_dmatable(ide_drive_t *drive, struct request *rq)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u32 *table = (u32 *)hwif->dmatable_cpu;
+ unsigned int count = 0;
+ int i;
+ struct scatterlist *sg;
+
+ hwif->sg_nents = ide_build_sglist(drive, rq);
+ if (hwif->sg_nents == 0)
+ return 0;
+
+ for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+ u32 cur_addr, cur_len, bcount;
+
+ cur_addr = sg_dma_address(sg);
+ cur_len = sg_dma_len(sg);
+
+ /*
+ * Fill in the DMA table, without crossing any 64kB boundaries.
+ */
+
+ while (cur_len) {
+ if (count++ >= PRD_ENTRIES)
+ goto use_pio_instead;
+
+ bcount = 0x10000 - (cur_addr & 0xffff);
+ if (bcount > cur_len)
+ bcount = cur_len;
+ *table++ = bcount & 0xffff;
+ *table++ = cur_addr;
+ cur_addr += bcount;
+ cur_len -= bcount;
+ }
+ }
+
+ if (count) {
+ *(table - 2) |= 0x80000000;
+ return count;
+ }
+
+use_pio_instead:
+ printk(KERN_ERR "%s: %s\n", drive->name,
+ count ? "DMA table too small" : "empty DMA table?");
+
+ ide_destroy_dmatable(drive);
+
+ return 0; /* revert to PIO for this request */
+}
+#else
+#define tx4939ide_build_dmatable ide_build_dmatable
+#endif
+
+static int tx4939ide_dma_setup(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ void __iomem *base = TX4939IDE_BASE(hwif);
+ struct request *rq = hwif->hwgroup->rq;
+ u8 reading;
+ int nent;
+
+ if (rq_data_dir(rq))
+ reading = 0;
+ else
+ reading = ATA_DMA_WR;
+
+ /* fall back to PIO! */
+ nent = tx4939ide_build_dmatable(drive, rq);
+ if (!nent) {
+ ide_map_sg(drive, rq);
+ return 1;
+ }
+
+ /* PRD table */
+ tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr);
+
+ /* specify r/w */
+ tx4939ide_writeb(reading, base, TX4939IDE_DMA_Cmd);
+
+ /* clear INTR & ERROR flags */
+ tx4939ide_clear_dma_status(base);
+
+ drive->waiting_for_dma = 1;
+
+ tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
+ TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
+ tx4939ide_writew(rq->nr_sectors, base, TX4939IDE_Sec_Cnt);
+ return 0;
+}
+
+static int tx4939ide_dma_end(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 dma_stat, dma_cmd;
+ void __iomem *base = TX4939IDE_BASE(hwif);
+ u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
+
+ drive->waiting_for_dma = 0;
+
+ /* get DMA command mode */
+ dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd);
+ /* stop DMA */
+ tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd);
+
+ /* read and clear the INTR & ERROR bits */
+ dma_stat = tx4939ide_clear_dma_status(base);
+
+ /* purge DMA mappings */
+ ide_destroy_dmatable(drive);
+ /* verify good DMA status */
+ wmb();
+
+ if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
+ (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
+ (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
+ /* INT_IDE lost... bug? */
+ return 0;
+ return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
+ ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
+}
+
+/* returns 1 if DMA IRQ issued, 0 otherwise */
+static int tx4939ide_dma_test_irq(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ void __iomem *base = TX4939IDE_BASE(hwif);
+ u16 ctl, ide_int;
+ u8 dma_stat, stat;
+ int found = 0;
+
+ ctl = tx4939ide_check_error_ints(hwif);
+ ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST);
+ switch (ide_int) {
+ case TX4939IDE_INT_HOST:
+ /* On error, XFEREND might not be asserted. */
+ stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl);
+ if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR)
+ found = 1;
+ else
+ /* Wait for XFEREND (Mask HOST and unmask XFEREND) */
+ ctl &= ~TX4939IDE_INT_XFEREND << 8;
+ ctl |= ide_int << 8;
+ break;
+ case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
+ dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+ if (!(dma_stat & ATA_DMA_INTR))
+ pr_warning("%s: weird interrupt status. "
+ "DMA_Stat %#02x int_ctl %#04x\n",
+ hwif->name, dma_stat, ctl);
+ found = 1;
+ break;
+ }
+ /*
+ * Do not clear XFEREND, HOST now. They will be cleared by
+ * clearing bit2 of DMA_Stat.
+ */
+ ctl &= ~ide_int;
+ tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
+ return found;
+}
+
+static void tx4939ide_init_hwif(ide_hwif_t *hwif)
+{
+ void __iomem *base = TX4939IDE_BASE(hwif);
+
+ /* Soft Reset */
+ tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl);
+ mmiowb();
+ /* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */
+ ndelay(450);
+ tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl);
+ /* mask some interrupts and clear all interrupts */
+ tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base,
+ TX4939IDE_Int_Ctl);
+
+ tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt);
+ tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt);
+}
+
+static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+ hwif->dma_base =
+ hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd);
+ /*
+ * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS
+ * for big endian.
+ */
+ return ide_allocate_dma_engine(hwif);
+}
+
+static void tx4939ide_tf_load_fixup(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ void __iomem *base = TX4939IDE_BASE(hwif);
+ u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0);
+
+ /*
+ * Fix ATA100 CORE System Control Register. (The write to the
+ * Device/Head register may write wrong data to the System
+ * Control Register)
+ * While Sys_Ctl is written here, selectproc is not needed.
+ */
+ tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
+}
+
+#ifdef __BIG_ENDIAN
+
+static u8 tx4939ide_read_sff_dma_status(ide_hwif_t *hwif)
+{
+ void __iomem *base = TX4939IDE_BASE(hwif);
+
+ return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+}
+
+/* custom iops (independent from SWAP_IO_SPACE) */
+static u8 tx4939ide_inb(unsigned long port)
+{
+ return __raw_readb((void __iomem *)port);
+}
+
+static void tx4939ide_outb(u8 value, unsigned long port)
+{
+ __raw_writeb(value, (void __iomem *)port);
+}
+
+static void tx4939ide_tf_load(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ struct ide_taskfile *tf = &task->tf;
+ u8 HIHI = task->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;
+
+ if (task->tf_flags & IDE_TFLAG_FLAGGED)
+ HIHI = 0xFF;
+
+ if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
+ u16 data = (tf->hob_data << 8) | tf->data;
+
+ /* no endian swap */
+ __raw_writew(data, (void __iomem *)io_ports->data_addr);
+ }
+
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
+ tx4939ide_outb(tf->hob_feature, io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
+ tx4939ide_outb(tf->hob_nsect, io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
+ tx4939ide_outb(tf->hob_lbal, io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
+ tx4939ide_outb(tf->hob_lbam, io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
+ tx4939ide_outb(tf->hob_lbah, io_ports->lbah_addr);
+
+ if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
+ tx4939ide_outb(tf->feature, io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
+ tx4939ide_outb(tf->nsect, io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
+ tx4939ide_outb(tf->lbal, io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
+ tx4939ide_outb(tf->lbam, io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
+ tx4939ide_outb(tf->lbah, io_ports->lbah_addr);
+
+ if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) {
+ tx4939ide_outb((tf->device & HIHI) | drive->select,
+ io_ports->device_addr);
+ tx4939ide_tf_load_fixup(drive, task);
+ }
+}
+
+static void tx4939ide_tf_read(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ struct ide_taskfile *tf = &task->tf;
+
+ if (task->tf_flags & IDE_TFLAG_IN_DATA) {
+ u16 data;
+
+ /* no endian swap */
+ data = __raw_readw((void __iomem *)io_ports->data_addr);
+ tf->data = data & 0xff;
+ tf->hob_data = (data >> 8) & 0xff;
+ }
+
+ /* be sure we're looking at the low order bits */
+ tx4939ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
+
+ if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
+ tf->feature = tx4939ide_inb(io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+ tf->nsect = tx4939ide_inb(io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+ tf->lbal = tx4939ide_inb(io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+ tf->lbam = tx4939ide_inb(io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+ tf->lbah = tx4939ide_inb(io_ports->lbah_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+ tf->device = tx4939ide_inb(io_ports->device_addr);
+
+ if (task->tf_flags & IDE_TFLAG_LBA48) {
+ tx4939ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
+
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+ tf->hob_feature =
+ tx4939ide_inb(io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+ tf->hob_nsect = tx4939ide_inb(io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+ tf->hob_lbal = tx4939ide_inb(io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+ tf->hob_lbam = tx4939ide_inb(io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+ tf->hob_lbah = tx4939ide_inb(io_ports->lbah_addr);
+ }
+}
+
+static void tx4939ide_input_data_swap(ide_drive_t *drive, struct request *rq,
+ void *buf, unsigned int len)
+{
+ unsigned long port = drive->hwif->io_ports.data_addr;
+ unsigned short *ptr = buf;
+ unsigned int count = (len + 1) / 2;
+
+ while (count--)
+ *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
+ __ide_flush_dcache_range((unsigned long)buf, count * 2);
+}
+
+static void tx4939ide_output_data_swap(ide_drive_t *drive, struct request *rq,
+ void *buf, unsigned int len)
+{
+ unsigned long port = drive->hwif->io_ports.data_addr;
+ unsigned short *ptr = buf;
+ unsigned int count = (len + 1) / 2;
+
+ while (count--) {
+ __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
+ ptr++;
+ }
+ __ide_flush_dcache_range((unsigned long)buf, count * 2);
+}
+
+static const struct ide_tp_ops tx4939ide_tp_ops = {
+ .exec_command = ide_exec_command,
+ .read_status = ide_read_status,
+ .read_altstatus = ide_read_altstatus,
+ .read_sff_dma_status = tx4939ide_read_sff_dma_status,
+
+ .set_irq = ide_set_irq,
+
+ .tf_load = tx4939ide_tf_load,
+ .tf_read = tx4939ide_tf_read,
+
+ .input_data = tx4939ide_input_data_swap,
+ .output_data = tx4939ide_output_data_swap,
+};
+
+#else /* __LITTLE_ENDIAN */
+
+static void tx4939ide_tf_load(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_tf_load(drive, task);
+ if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
+ tx4939ide_tf_load_fixup(drive, task);
+}
+
+static const struct ide_tp_ops tx4939ide_tp_ops = {
+ .exec_command = ide_exec_command,
+ .read_status = ide_read_status,
+ .read_altstatus = ide_read_altstatus,
+ .read_sff_dma_status = ide_read_sff_dma_status,
+
+ .set_irq = ide_set_irq,
+
+ .tf_load = tx4939ide_tf_load,
+ .tf_read = ide_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};
+
+#endif /* __LITTLE_ENDIAN */
+
+static const struct ide_port_ops tx4939ide_port_ops = {
+ .set_pio_mode = tx4939ide_set_pio_mode,
+ .set_dma_mode = tx4939ide_set_dma_mode,
+ .clear_irq = tx4939ide_clear_irq,
+ .cable_detect = tx4939ide_cable_detect,
+};
+
+static const struct ide_dma_ops tx4939ide_dma_ops = {
+ .dma_host_set = tx4939ide_dma_host_set,
+ .dma_setup = tx4939ide_dma_setup,
+ .dma_exec_cmd = ide_dma_exec_cmd,
+ .dma_start = ide_dma_start,
+ .dma_end = tx4939ide_dma_end,
+ .dma_test_irq = tx4939ide_dma_test_irq,
+ .dma_lost_irq = ide_dma_lost_irq,
+ .dma_timeout = ide_dma_timeout,
+};
+
+static const struct ide_port_info tx4939ide_port_info __initdata = {
+ .init_hwif = tx4939ide_init_hwif,
+ .init_dma = tx4939ide_init_dma,
+ .port_ops = &tx4939ide_port_ops,
+ .dma_ops = &tx4939ide_dma_ops,
+ .tp_ops = &tx4939ide_tp_ops,
+ .host_flags = IDE_HFLAG_MMIO,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA5,
+};
+
+static int __init tx4939ide_probe(struct platform_device *pdev)
+{
+ hw_regs_t hw;
+ hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
+ struct ide_host *host;
+ struct resource *res;
+ int irq, ret;
+ unsigned long mapbase;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ if (!devm_request_mem_region(&pdev->dev, res->start,
+ res->end - res->start + 1, "tx4938ide"))
+ return -EBUSY;
+ mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
+ res->end - res->start + 1);
+ if (!mapbase)
+ return -EBUSY;
+ memset(&hw, 0, sizeof(hw));
+ hw.io_ports.data_addr =
+ mapbase + tx4939ide_swizzlew(TX4939IDE_Data);
+ hw.io_ports.error_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature);
+ hw.io_ports.nsect_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_Sec);
+ hw.io_ports.lbal_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0);
+ hw.io_ports.lbam_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1);
+ hw.io_ports.lbah_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2);
+ hw.io_ports.device_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead);
+ hw.io_ports.command_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd);
+ hw.io_ports.ctl_addr =
+ mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl);
+ hw.irq = irq;
+ hw.dev = &pdev->dev;
+
+ pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq);
+ host = ide_host_alloc(&tx4939ide_port_info, hws);
+ if (!host)
+ return -ENOMEM;
+ /* use extra_base for base address of the all registers */
+ host->ports[0]->extra_base = mapbase;
+ ret = ide_host_register(host, &tx4939ide_port_info, hws);
+ if (ret) {
+ ide_host_free(host);
+ return ret;
+ }
+ platform_set_drvdata(pdev, host);
+ return 0;
+}
+
+static int __exit tx4939ide_remove(struct platform_device *pdev)
+{
+ struct ide_host *host = platform_get_drvdata(pdev);
+
+ ide_host_remove(host);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int tx4939ide_resume(struct platform_device *dev)
+{
+ struct ide_host *host = platform_get_drvdata(dev);
+ ide_hwif_t *hwif = host->ports[0];
+
+ tx4939ide_init_hwif(hwif);
+ return 0;
+}
+#else
+#define tx4939ide_resume NULL
+#endif
+
+static struct platform_driver tx4939ide_driver = {
+ .driver = {
+ .name = MODNAME,
+ .owner = THIS_MODULE,
+ },
+ .remove = __exit_p(tx4939ide_remove),
+ .resume = tx4939ide_resume,
+};
+
+static int __init tx4939ide_init(void)
+{
+ return platform_driver_probe(&tx4939ide_driver, tx4939ide_probe);
+}
+
+static void __exit tx4939ide_exit(void)
+{
+ platform_driver_unregister(&tx4939ide_driver);
+}
+
+module_init(tx4939ide_init);
+module_exit(tx4939ide_exit);
+
+MODULE_DESCRIPTION("TX4939 internal IDE driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:tx4939ide");
--
1.5.6.3
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
