ide: Add tx4938ide driver (v2) (28502848) · Commits · 戴 / test

drivers/ide/Kconfig

+5 −0

Original line number	Diff line number	Diff line
		@@ -720,6 +720,11 @@ config BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
		default "128"
		depends on BLK_DEV_IDE_AU1XXX

		config BLK_DEV_IDE_TX4938
		tristate "TX4938 internal IDE support"
		depends on SOC_TX4938
		select IDE_TIMINGS

		config BLK_DEV_IDE_TX4939
		tristate "TX4939 internal IDE support"
		depends on SOC_TX4939

drivers/ide/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -112,4 +112,5 @@ obj-$(CONFIG_BLK_DEV_PALMCHIP_BK3710) += palm_bk3710.o

		obj-$(CONFIG_BLK_DEV_IDE_AU1XXX) += au1xxx-ide.o

		obj-$(CONFIG_BLK_DEV_IDE_TX4938) += tx4938ide.o
		obj-$(CONFIG_BLK_DEV_IDE_TX4939) += tx4939ide.o

drivers/ide/tx4938ide.c

0 → 100644

+310 −0

Original line number	Diff line number	Diff line
		/*
		* 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 <linux/module.h>
		#include <linux/types.h>
		#include <linux/ide.h>
		#include <linux/init.h>
		#include <linux/platform_device.h>
		#include <linux/io.h>
		#include <asm/txx9/tx4938.h>

		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 wt, shwt;

		/* Minimum DIOx- active time */
		wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
		/* IORDY setup time: 35ns */
		wt = max(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);

		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, count * 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, count * 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,
		.read_sff_dma_status = ide_read_sff_dma_status,

		.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,
		};

		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;
		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,
		res->end - res->start + 1);
		if (!mapbase)
		return -EBUSY;

		memset(&hw, 0, sizeof(hw));
		if (pdata->ioport_shift) {
		unsigned long port = mapbase;

		hw.io_ports_array[0] = port;
		#ifdef __BIG_ENDIAN
		port++;
		#endif
		for (i = 1; i <= 7; i++)
		hw.io_ports_array[i] =
		port + (i << pdata->ioport_shift);
		hw.io_ports.ctl_addr =
		port + 0x10000 + (6 << pdata->ioport_shift);
		} else
		ide_std_init_ports(&hw, mapbase, mapbase + 0x10006);
		hw.irq = irq;
		hw.dev = &pdev->dev;

		pr_info("TX4938 IDE interface (base %#lx, irq %d)\n", mapbase, 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)
		return ret;
		platform_set_drvdata(pdev, host);
		return 0;
		}

		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");

Admin message