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/port_ops routines.
Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
---
This patch is against linux-next 20080905.
drivers/ide/Kconfig | 6 +
drivers/ide/mips/Makefile | 1 +
drivers/ide/mips/tx4939ide.c | 762 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 769 insertions(+), 0 deletions(-)
create mode 100644 drivers/ide/mips/tx4939ide.c
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 325461c..0ed731a 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -736,6 +736,12 @@ 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
+ select IDE_TIMINGS
+
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 677c7b2..1e0ad98 100644
--- a/drivers/ide/mips/Makefile
+++ b/drivers/ide/mips/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_BLK_DEV_IDE_SWARM) += swarm.o
obj-$(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..ba9776d
--- /dev/null
+++ b/drivers/ide/mips/tx4939ide.c
@@ -0,0 +1,762 @@
+/*
+ * 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>
+
+#define MODNAME "tx4939ide"
+
+/* ATA Shadow Registers (8bit except for DATA which is 16bit) */
+#define TX4939IDE_DATA 0x000
+#define TX4939IDE_Error_Ft 0x001
+#define TX4939IDE_Sec 0x002
+#define TX4939IDE_LBA0 0x003
+#define TX4939IDE_LBA1 0x004
+#define TX4939IDE_LBA2 0x005
+#define TX4939IDE_Device 0x006
+#define TX4939IDE_St_Cmd 0x007
+#define TX4939IDE_Alt_DevCtl 0x402
+/* H/W DMA Registers */
+#define TX4939IDE_DMA_Cmd 0x800 /* 8bit */
+#define TX4939IDE_DMA_stat 0x802 /* 8bit */
+#define TX4939IDE_PRD_Ptr 0x804 /* 32bit */
+/* ATA100 CORE Registers (16bit) */
+#define TX4939IDE_Sys_Ctl 0xc00
+#define TX4939IDE_Xfer_Cnt_1 0xc08
+#define TX4939IDE_Xfer_Cnt_2 0xc0a
+#define TX4939IDE_Sec_Cnt 0xc10
+#define TX4939IDE_Strt_AddL 0xc18
+#define TX4939IDE_Strt_AddU 0xc20
+#define TX4939IDE_Add_Ctl 0xc28
+#define TX4939IDE_Lo_BCnt 0xc30
+#define TX4939IDE_Up_BCnt 0xc38
+#define TX4939IDE_PIO_Acc 0xc88
+#define TX4939IDE_H_Rst_Tim 0xc90
+#define TX4939IDE_int_ctl 0xc98
+#define TX4939IDE_Pkt_Cmd 0xcb8
+#define TX4939IDE_Bxfer_cntH 0xcc0
+#define TX4939IDE_Bxfer_cntL 0xcc8
+#define TX4939IDE_Dev_TErr 0xcd0
+#define TX4939IDE_Pkt_xfer_ct 0xcd8
+#define TX4939IDE_Strt_AddT 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)
+
+#ifdef __BIG_ENDIAN
+#define TX4939IDE_REG32(reg) (TX4939IDE_##reg ^ 4)
+#define TX4939IDE_REG16(reg) (TX4939IDE_##reg ^ 6)
+#define TX4939IDE_REG8(reg) (TX4939IDE_##reg ^ 7)
+#else
+#define TX4939IDE_REG32(reg) (TX4939IDE_##reg)
+#define TX4939IDE_REG16(reg) (TX4939IDE_##reg)
+#define TX4939IDE_REG8(reg) (TX4939IDE_##reg)
+#endif
+
+#define TX4939IDE_readl(base, reg) \
+ __raw_readl((void __iomem *)((base) + TX4939IDE_REG32(reg)))
+#define TX4939IDE_readw(base, reg) \
+ __raw_readw((void __iomem *)((base) + TX4939IDE_REG16(reg)))
+#define TX4939IDE_readb(base, reg) \
+ __raw_readb((void __iomem *)((base) + TX4939IDE_REG8(reg)))
+#define TX4939IDE_writel(val, base, reg) \
+ __raw_writel(val, (void __iomem *)((base) + TX4939IDE_REG32(reg)))
+#define TX4939IDE_writew(val, base, reg) \
+ __raw_writew(val, (void __iomem *)((base) + TX4939IDE_REG16(reg)))
+#define TX4939IDE_writeb(val, base, reg) \
+ __raw_writeb(val, (void __iomem *)((base) + TX4939IDE_REG8(reg)))
+
+#define TX4939IDE_BASE(hwif) ((hwif)->io_ports.data_addr & ~0xfff)
+
+static void tx4939ide_set_mode(ide_drive_t *drive, const u8 speed)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ unsigned long base = TX4939IDE_BASE(hwif);
+ int is_slave = drive->dn & 1;
+ u16 value;
+ int safe_speed = speed;
+ int i;
+
+ for (i = 0; i < MAX_DRIVES; i++) {
+ if (drive != &hwif->drives[i] &&
+ (hwif->drives[i].dev_flags & IDE_DFLAG_PRESENT))
+ safe_speed = min(safe_speed,
+ (int)hwif->drives[i].current_speed);
+ }
+
+ /* Data Transfer Mode Select */
+ switch (speed) {
+ case XFER_UDMA_5:
+ value = 0x00d0;
+ break;
+ case XFER_UDMA_4:
+ value = 0x00c0;
+ break;
+ case XFER_UDMA_3:
+ value = 0x00b0;
+ break;
+ case XFER_UDMA_2:
+ value = 0x00a0;
+ break;
+ case XFER_UDMA_1:
+ value = 0x0090;
+ break;
+ case XFER_UDMA_0:
+ value = 0x0080;
+ break;
+ case XFER_MW_DMA_2:
+ value = 0x0070;
+ break;
+ case XFER_MW_DMA_1:
+ value = 0x0060;
+ break;
+ case XFER_MW_DMA_0:
+ value = 0x0050;
+ break;
+ case XFER_PIO_4:
+ value = 0x0040;
+ break;
+ case XFER_PIO_3:
+ value = 0x0030;
+ break;
+ case XFER_PIO_2:
+ value = 0x0020;
+ break;
+ case XFER_PIO_1:
+ value = 0x0010;
+ break;
+ default:
+ case XFER_PIO_0:
+ value = 0x0000;
+ break;
+ }
+ /* Command Transfer Mode Select */
+ switch (safe_speed) {
+ case XFER_UDMA_5:
+ case XFER_UDMA_4:
+ case XFER_UDMA_3:
+ case XFER_UDMA_2:
+ case XFER_UDMA_1:
+ case XFER_UDMA_0:
+ case XFER_MW_DMA_2:
+ case XFER_MW_DMA_1:
+ case XFER_MW_DMA_0:
+ case XFER_PIO_4:
+ value |= 0x0400;
+ break;
+ case XFER_PIO_3:
+ value |= 0x0300;
+ break;
+ case XFER_PIO_2:
+ value |= 0x0200;
+ break;
+ case XFER_PIO_1:
+ value |= 0x0100;
+ break;
+ default:
+ case XFER_PIO_0:
+ value |= 0x0000;
+ break;
+ }
+
+ if (is_slave)
+ hwif->select_data =
+ (hwif->select_data & ~0xffff0000) | (value << 16);
+ else
+ hwif->select_data = (hwif->select_data & ~0x0000ffff) | value;
+ TX4939IDE_writew(value, base, Sys_Ctl);
+}
+
+static void tx4939ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
+{
+ tx4939ide_set_mode(drive, XFER_PIO_0 + pio);
+}
+
+static void tx4939ide_check_error_ints(ide_hwif_t *hwif, u16 stat)
+{
+ if (stat & TX4939IDE_INT_BUSERR) {
+ unsigned long base = TX4939IDE_BASE(hwif);
+ /* reset FIFO */
+ TX4939IDE_writew(TX4939IDE_readw(base, Sys_Ctl) |
+ 0x4000,
+ base, Sys_Ctl);
+ }
+ if (stat & (TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL |
+ TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR))
+ pr_err("%s: Error interrupt %#x (%s%s%s%s )\n",
+ hwif->name, stat,
+ (stat & TX4939IDE_INT_ADDRERR) ?
+ " Address-Error" : "",
+ (stat & TX4939IDE_INT_REACHMUL) ?
+ " Reach-Multiple" : "",
+ (stat & TX4939IDE_INT_DEVTIMING) ?
+ " DEV-Timing" : "",
+ (stat & TX4939IDE_INT_BUSERR) ?
+ " Bus-Error" : "");
+}
+
+static void tx4939ide_clear_irq(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif;
+ unsigned long base;
+ u16 ctl;
+
+ /*
+ * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all
+ * jobs for DMA case.
+ */
+ if (drive->waiting_for_dma)
+ return;
+ hwif = HWIF(drive);
+ base = TX4939IDE_BASE(hwif);
+ ctl = TX4939IDE_readw(base, int_ctl);
+
+ tx4939ide_check_error_ints(hwif, ctl);
+ TX4939IDE_writew(ctl, base, int_ctl);
+}
+
+static u8 tx4939ide_cable_detect(ide_hwif_t *hwif)
+{
+ unsigned long base = TX4939IDE_BASE(hwif);
+
+ return (TX4939IDE_readw(base, Sys_Ctl) & 0x2000)
+ ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static void tx4939ide_dma_host_set(ide_drive_t *drive, int on)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ u8 unit = drive->dn & 1;
+ unsigned long base = TX4939IDE_BASE(hwif);
+ u8 dma_stat = TX4939IDE_readb(base, DMA_stat);
+
+ if (on)
+ dma_stat |= (1 << (5 + unit));
+ else
+ dma_stat &= ~(1 << (5 + unit));
+
+ TX4939IDE_writeb(dma_stat, base, DMA_stat);
+}
+
+static int __tx4939ide_dma_setup(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct request *rq = HWGROUP(drive)->rq;
+ unsigned int reading;
+ u8 dma_stat;
+ unsigned long base = TX4939IDE_BASE(hwif);
+
+ if (rq_data_dir(rq))
+ reading = 0;
+ else
+ reading = 1 << 3;
+
+ /* fall back to pio! */
+ if (!ide_build_dmatable(drive, rq)) {
+ ide_map_sg(drive, rq);
+ return 1;
+ }
+#ifdef __BIG_ENDIAN
+ {
+ unsigned int *table = hwif->dmatable_cpu;
+ while (1) {
+ cpu_to_le64s((u64 *)table);
+ if (*table & 0x80000000)
+ break;
+ table += 2;
+ }
+ }
+#endif
+
+ /* PRD table */
+ TX4939IDE_writel(hwif->dmatable_dma, base, PRD_Ptr);
+
+ /* specify r/w */
+ TX4939IDE_writeb(reading, base, DMA_Cmd);
+
+ /* read DMA status for INTR & ERROR flags */
+ dma_stat = TX4939IDE_readb(base, DMA_stat);
+
+ /* clear INTR & ERROR flags */
+ TX4939IDE_writeb(dma_stat | 6, base, DMA_stat);
+ /* recover intmask cleared by writing to bit2 of DMA_stat */
+ TX4939IDE_writew(TX4939IDE_IGNORE_INTS << 8, base, int_ctl);
+
+ drive->waiting_for_dma = 1;
+ return 0;
+}
+
+static int tx4939ide_dma_setup(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ unsigned long base = TX4939IDE_BASE(hwif);
+ int is_slave = drive->dn & 1;
+ unsigned int nframes;
+ int rc, i;
+ unsigned int sect_size = queue_hardsect_size(drive->queue);
+ u16 select_data;
+
+ select_data = (hwif->select_data >> (is_slave ? 16 : 0)) & 0xffff;
+ TX4939IDE_writew(select_data, base, Sys_Ctl);
+ if (is_slave)
+ TX4939IDE_writew(sect_size / 2, base, Xfer_Cnt_2);
+ else
+ TX4939IDE_writew(sect_size / 2, base, Xfer_Cnt_1);
+
+ rc = __tx4939ide_dma_setup(drive);
+ if (rc == 0) {
+ /* Number of sectors to transfer. */
+ nframes = 0;
+ for (i = 0; i < hwif->sg_nents; i++)
+ nframes += sg_dma_len(&hwif->sg_table[i]);
+ BUG_ON(nframes % sect_size != 0);
+ nframes /= sect_size;
+ BUG_ON(nframes == 0);
+ TX4939IDE_writew(nframes, base, Sec_Cnt);
+ }
+ return rc;
+}
+
+static void tx4939ide_dma_start(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ unsigned long base = TX4939IDE_BASE(hwif);
+ u8 dma_cmd;
+
+ /* Note that this is done *after* the cmd has
+ * been issued to the drive, as per the BM-IDE spec.
+ */
+ dma_cmd = TX4939IDE_readb(base, DMA_Cmd);
+ /* start DMA */
+ TX4939IDE_writeb(dma_cmd | 1, base, DMA_Cmd);
+
+ wmb();
+}
+
+static int tx4939ide_dma_end(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 dma_stat = 0, dma_cmd = 0;
+ unsigned long base = TX4939IDE_BASE(hwif);
+ u16 ctl = TX4939IDE_readw(base, int_ctl);
+
+ drive->waiting_for_dma = 0;
+
+ /* get DMA command mode */
+ dma_cmd = TX4939IDE_readb(base, DMA_Cmd);
+ /* stop DMA */
+ TX4939IDE_writeb(dma_cmd & ~1, base, DMA_Cmd);
+
+ /* get DMA status */
+ dma_stat = TX4939IDE_readb(base, DMA_stat);
+
+ /* clear the INTR & ERROR bits */
+ TX4939IDE_writeb(dma_stat | 6, base, DMA_stat);
+ /* recover intmask cleared by writing to bit2 of DMA_stat */
+ TX4939IDE_writew(TX4939IDE_IGNORE_INTS << 8, base, int_ctl);
+
+ /* purge DMA mappings */
+ ide_destroy_dmatable(drive);
+ /* verify good DMA status */
+ wmb();
+
+ if ((dma_stat & 7) == 0 &&
+ (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
+ (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
+ /* INT_IDE lost... bug? */
+ return 0;
+ return (dma_stat & 7) != 4 ? (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 = HWIF(drive);
+ unsigned long base = TX4939IDE_BASE(hwif);
+ u16 ctl = TX4939IDE_readw(base, int_ctl);
+ u8 dma_stat, stat;
+ u16 ide_int;
+ int found = 0;
+
+ tx4939ide_check_error_ints(hwif, ctl);
+ 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, Alt_DevCtl);
+ if ((stat & (ATA_BUSY|ATA_DRQ|ATA_ERR)) == ATA_ERR) {
+ pr_err("%s: detect error %x in %s\n",
+ drive->name, stat, __func__);
+ found = 1;
+ }
+ /* FALLTHRU */
+ case TX4939IDE_INT_XFEREND:
+ /*
+ * If only one of XFERINT and HOST was asserted, mask
+ * this interrupt and wait for an another one. Note
+ * that write to bit2 of DMA_stat will clear all
+ * mask bits.
+ */
+ ctl |= ide_int << 8;
+ break;
+ case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
+ dma_stat = TX4939IDE_readb(base, DMA_stat);
+ if (!(dma_stat & 4))
+ pr_debug("%s: weired interrupt status. "
+ "DMA_stat %#02x int_ctl %#04x\n",
+ hwif->name, dma_stat, ctl);
+ found = 1;
+ break;
+ }
+ /*
+ * Do not clear XFERINT, HOST now. They will be cleared by
+ * clearing bit2 of DMA_stat.
+ */
+ ctl &= ~ide_int;
+ TX4939IDE_writew(ctl, base, int_ctl);
+ return found;
+}
+
+static void tx4939ide_hwif_init(ide_hwif_t *hwif)
+{
+ unsigned long base = TX4939IDE_BASE(hwif);
+ int timeout;
+
+ /* Soft Reset */
+ TX4939IDE_writew(0x8000, base, Sys_Ctl);
+ mmiowb();
+ udelay(1); /* at least 20 UPSCLK (100ns for 200MHz GBUSCLK) */
+ /* ATA Hard Reset */
+ TX4939IDE_writew(0x0800, base, Sys_Ctl);
+ timeout = 1000;
+ while (TX4939IDE_readw(base, Sys_Ctl) & 0x0800) {
+ if (timeout--)
+ break;
+ udelay(1);
+ }
+ /* mask some interrupts and clear all interrupts */
+ TX4939IDE_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base, int_ctl);
+
+#ifdef __BIG_ENDIAN
+ /* This setting does not affect PRD fetch */
+ /* ByteSwap=1, Endian=00 */
+ TX4939IDE_writew(0xc911, base, Add_Ctl);
+#else
+ TX4939IDE_writew(0xc901, base, Add_Ctl);
+#endif
+
+ TX4939IDE_writew(0x0008, base, Lo_BCnt);
+ TX4939IDE_writew(0, base, Up_BCnt);
+}
+
+static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+ return ide_allocate_dma_engine(hwif);
+}
+
+#ifdef __BIG_ENDIAN
+/* custom iops (independent from SWAP_IO_SPACE) */
+static u8 mm_inb(unsigned long port)
+{
+ return (u8)readb((void __iomem *)port);
+}
+static void mm_outb(u8 value, unsigned long port)
+{
+ writeb(value, (void __iomem *)port);
+}
+static void mm_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;
+
+ __raw_writew(data, (void __iomem *)io_ports->data_addr);
+ }
+
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
+ mm_outb(tf->hob_feature, io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
+ mm_outb(tf->hob_nsect, io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
+ mm_outb(tf->hob_lbal, io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
+ mm_outb(tf->hob_lbam, io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
+ mm_outb(tf->hob_lbah, io_ports->lbah_addr);
+
+ if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
+ mm_outb(tf->feature, io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
+ mm_outb(tf->nsect, io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
+ mm_outb(tf->lbal, io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
+ mm_outb(tf->lbam, io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
+ mm_outb(tf->lbah, io_ports->lbah_addr);
+
+ if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) {
+ unsigned long base = TX4939IDE_BASE(hwif);
+ mm_outb((tf->device & HIHI) | drive->select,
+ io_ports->device_addr);
+ /* Fix ATA100 CORE System Control Register */
+ TX4939IDE_writew(TX4939IDE_readw(base, Sys_Ctl) & 0x07f0,
+ base, Sys_Ctl);
+ }
+}
+static void mm_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;
+
+ 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 */
+ mm_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
+
+ if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
+ tf->feature = mm_inb(io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+ tf->nsect = mm_inb(io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+ tf->lbal = mm_inb(io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+ tf->lbam = mm_inb(io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+ tf->lbah = mm_inb(io_ports->lbah_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+ tf->device = mm_inb(io_ports->device_addr);
+
+ if (task->tf_flags & IDE_TFLAG_LBA48) {
+ mm_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
+
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+ tf->hob_feature = mm_inb(io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+ tf->hob_nsect = mm_inb(io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+ tf->hob_lbal = mm_inb(io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+ tf->hob_lbam = mm_inb(io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+ tf->hob_lbah = mm_inb(io_ports->lbah_addr);
+ }
+}
+
+static void mm_insw_swap(unsigned long port, void *addr, u32 count)
+{
+ unsigned short *ptr = addr;
+ unsigned long size = count * 2;
+ port &= ~1;
+ while (count--)
+ *ptr++ = le16_to_cpu(__raw_readw((void __iomem *)port));
+ __ide_flush_dcache_range((unsigned long)addr, size);
+}
+static void mm_outsw_swap(unsigned long port, void *addr, u32 count)
+{
+ unsigned short *ptr = addr;
+ unsigned long size = count * 2;
+ port &= ~1;
+ while (count--) {
+ __raw_writew(cpu_to_le16(*ptr), (void __iomem *)port);
+ ptr++;
+ }
+ __ide_flush_dcache_range((unsigned long)addr, size);
+}
+static void mmio_input_data_swap(ide_drive_t *drive, struct request *rq,
+ void *buf, unsigned int len)
+{
+ mm_insw_swap(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
+}
+static void mmio_output_data_swap(ide_drive_t *drive, struct request *rq,
+ void *buf, unsigned int len)
+{
+ mm_outsw_swap(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
+}
+
+static u8 tx4939ide_read_sff_dma_status(ide_hwif_t *hwif)
+{
+ unsigned long base = TX4939IDE_BASE(hwif);
+ return TX4939IDE_readb(base, DMA_stat);
+}
+
+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 = mm_tf_load,
+ .tf_read = mm_tf_read,
+
+ .input_data = mmio_input_data_swap,
+ .output_data = mmio_output_data_swap,
+};
+#endif /* __BIG_ENDIAN */
+
+static const struct ide_port_ops tx4939ide_port_ops = {
+ .set_pio_mode = tx4939ide_set_pio_mode,
+ .set_dma_mode = tx4939ide_set_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 = tx4939ide_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_hwif_init,
+ .init_dma = tx4939ide_init_dma,
+ .port_ops = &tx4939ide_port_ops,
+ .dma_ops = &tx4939ide_dma_ops,
+#ifdef __BIG_ENDIAN
+ .tp_ops = &tx4939ide_tp_ops,
+#endif
+ .host_flags = IDE_HFLAG_MMIO,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .swdma_mask = ATA_SWDMA2,
+ .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;
+ unsigned long mapbase;
+ int ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ 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_REG8(DATA);
+ hw.io_ports.error_addr = mapbase + TX4939IDE_REG8(Error_Ft);
+ hw.io_ports.nsect_addr = mapbase + TX4939IDE_REG8(Sec);
+ hw.io_ports.lbal_addr = mapbase + TX4939IDE_REG8(LBA0);
+ hw.io_ports.lbam_addr = mapbase + TX4939IDE_REG8(LBA1);
+ hw.io_ports.lbah_addr = mapbase + TX4939IDE_REG8(LBA2);
+ hw.io_ports.device_addr = mapbase + TX4939IDE_REG8(Device);
+ hw.io_ports.command_addr = mapbase + TX4939IDE_REG8(St_Cmd);
+ hw.io_ports.ctl_addr = mapbase + TX4939IDE_REG8(Alt_DevCtl);
+ hw.irq = irq;
+ hw.dev = &pdev->dev;
+
+ pr_info("TX4939 IDE interface (%lx,%d)\n", mapbase, irq);
+ ret = ide_host_add(&tx4939ide_port_info, hws, &host);
+ if (ret)
+ 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];
+ unsigned long base = TX4939IDE_BASE(hwif);
+
+ tx4939ide_hwif_init(hwif);
+
+ /* restore Sys_Ctl */
+ TX4939IDE_writew(hwif->select_data & 0xffff, base, Sys_Ctl);
+ 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
