/* * TX4938 internal IDE driver * Based on tx4939ide.c. * * 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 #include #include #include #include #include #include #include static void tx4938ide_tune_ebusc(unsigned int ebus_ch, unsigned int gbus_clock, u8 pio) { struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]); unsigned int sp = (cr >> 4) & 3; unsigned int clock = gbus_clock / (4 - sp); unsigned int cycle = 1000000000 / clock; unsigned int shwt; int wt; /* Minimum DIOx- active time */ wt = DIV_ROUND_UP(t->act8b, cycle) - 2; /* IORDY setup time: 35ns */ wt = max_t(int, wt, DIV_ROUND_UP(35, cycle)); /* actual wait-cycle is max(wt & ~1, 1) */ if (wt > 2 && (wt & 1)) wt++; wt &= ~1; /* Address-valid to DIOR/DIOW setup */ shwt = DIV_ROUND_UP(t->setup, cycle); /* -DIOx recovery time (SHWT * 4) and cycle time requirement */ while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle) shwt++; if (shwt > 7) { pr_warning("tx4938ide: SHWT violation (%d)\n", shwt); shwt = 7; } pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n", ebus_ch, cycle, wt, shwt); __raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt, &tx4938_ebuscptr->cr[ebus_ch]); } static void tx4938ide_set_pio_mode(ide_drive_t *drive, const u8 pio) { ide_hwif_t *hwif = drive->hwif; struct tx4938ide_platform_info *pdata = hwif->dev->platform_data; 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, 5)); tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe); } #ifdef __BIG_ENDIAN /* custom iops (independent from SWAP_IO_SPACE) */ static u8 tx4938ide_inb(unsigned long port) { return __raw_readb((void __iomem *)port); } static void tx4938ide_outb(u8 value, unsigned long port) { __raw_writeb(value, (void __iomem *)port); } static void tx4938ide_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) tx4938ide_outb(tf->hob_feature, io_ports->feature_addr); if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) tx4938ide_outb(tf->hob_nsect, io_ports->nsect_addr); if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) tx4938ide_outb(tf->hob_lbal, io_ports->lbal_addr); if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) tx4938ide_outb(tf->hob_lbam, io_ports->lbam_addr); if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) tx4938ide_outb(tf->hob_lbah, io_ports->lbah_addr); if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) tx4938ide_outb(tf->feature, io_ports->feature_addr); if (task->tf_flags & IDE_TFLAG_OUT_NSECT) tx4938ide_outb(tf->nsect, io_ports->nsect_addr); if (task->tf_flags & IDE_TFLAG_OUT_LBAL) tx4938ide_outb(tf->lbal, io_ports->lbal_addr); if (task->tf_flags & IDE_TFLAG_OUT_LBAM) tx4938ide_outb(tf->lbam, io_ports->lbam_addr); if (task->tf_flags & IDE_TFLAG_OUT_LBAH) tx4938ide_outb(tf->lbah, io_ports->lbah_addr); if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) tx4938ide_outb((tf->device & HIHI) | drive->select, io_ports->device_addr); } static void tx4938ide_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 */ tx4938ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); if (task->tf_flags & IDE_TFLAG_IN_FEATURE) tf->feature = tx4938ide_inb(io_ports->feature_addr); if (task->tf_flags & IDE_TFLAG_IN_NSECT) tf->nsect = tx4938ide_inb(io_ports->nsect_addr); if (task->tf_flags & IDE_TFLAG_IN_LBAL) tf->lbal = tx4938ide_inb(io_ports->lbal_addr); if (task->tf_flags & IDE_TFLAG_IN_LBAM) tf->lbam = tx4938ide_inb(io_ports->lbam_addr); if (task->tf_flags & IDE_TFLAG_IN_LBAH) tf->lbah = tx4938ide_inb(io_ports->lbah_addr); if (task->tf_flags & IDE_TFLAG_IN_DEVICE) tf->device = tx4938ide_inb(io_ports->device_addr); if (task->tf_flags & IDE_TFLAG_LBA48) { tx4938ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) tf->hob_feature = tx4938ide_inb(io_ports->feature_addr); if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) tf->hob_nsect = tx4938ide_inb(io_ports->nsect_addr); if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) tf->hob_lbal = tx4938ide_inb(io_ports->lbal_addr); if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) tf->hob_lbam = tx4938ide_inb(io_ports->lbam_addr); if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) tf->hob_lbah = tx4938ide_inb(io_ports->lbah_addr); } } static void tx4938ide_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, roundup(len, 2)); } static void tx4938ide_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, roundup(len, 2)); } static const struct ide_tp_ops tx4938ide_tp_ops = { .exec_command = ide_exec_command, .read_status = ide_read_status, .read_altstatus = ide_read_altstatus, .set_irq = ide_set_irq, .tf_load = tx4938ide_tf_load, .tf_read = tx4938ide_tf_read, .input_data = tx4938ide_input_data_swap, .output_data = tx4938ide_output_data_swap, }; #endif /* __BIG_ENDIAN */ static const struct ide_port_ops tx4938ide_port_ops = { .set_pio_mode = tx4938ide_set_pio_mode, }; static const struct ide_port_info tx4938ide_port_info __initdata = { .port_ops = &tx4938ide_port_ops, #ifdef __BIG_ENDIAN .tp_ops = &tx4938ide_tp_ops, #endif .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, .pio_mask = ATA_PIO5, .chipset = ide_generic, }; static int __init tx4938ide_probe(struct platform_device *pdev) { hw_regs_t hw; hw_regs_t *hws[] = { &hw, NULL, NULL, NULL }; struct ide_host *host; struct resource *res; struct tx4938ide_platform_info *pdata = pdev->dev.platform_data; int irq, ret, i; unsigned long mapbase, mapctl; struct ide_port_info d = tx4938ide_port_info; 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, 8 << pdata->ioport_shift); mapctl = (unsigned long)devm_ioremap(&pdev->dev, res->start + 0x10000 + (6 << pdata->ioport_shift), 1 << pdata->ioport_shift); if (!mapbase || !mapctl) return -EBUSY; memset(&hw, 0, sizeof(hw)); if (pdata->ioport_shift) { unsigned long port = mapbase; unsigned long ctl = mapctl; hw.io_ports_array[0] = port; #ifdef __BIG_ENDIAN port++; ctl++; #endif for (i = 1; i <= 7; i++) hw.io_ports_array[i] = port + (i << pdata->ioport_shift); hw.io_ports.ctl_addr = ctl; } else ide_std_init_ports(&hw, mapbase, mapctl); hw.irq = irq; hw.dev = &pdev->dev; pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n", mapbase, mapctl, hw.irq); if (pdata->gbus_clock) tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0); else d.port_ops = NULL; ret = ide_host_add(&d, hws, &host); if (!ret) platform_set_drvdata(pdev, host); return ret; } static int __exit tx4938ide_remove(struct platform_device *pdev) { struct ide_host *host = platform_get_drvdata(pdev); ide_host_remove(host); return 0; } static struct platform_driver tx4938ide_driver = { .driver = { .name = "tx4938ide", .owner = THIS_MODULE, }, .remove = __exit_p(tx4938ide_remove), }; static int __init tx4938ide_init(void) { return platform_driver_probe(&tx4938ide_driver, tx4938ide_probe); } static void __exit tx4938ide_exit(void) { platform_driver_unregister(&tx4938ide_driver); } module_init(tx4938ide_init); module_exit(tx4938ide_exit); MODULE_DESCRIPTION("TX4938 internal IDE driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:tx4938ide");