Release 4.7 drivers/ide/alim15x3.c

/*
 *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
 *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
 *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
 *
 *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
 *  May be copied or modified under the terms of the GNU General Public License
 *  Copyright (C) 2002 Alan Cox
 *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
 *  Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
 *  Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
 *
 *  (U)DMA capable version of ali 1533/1543(C), 1535(D)
 *
 **********************************************************************
 *  9/7/99 --Parts from the above author are included and need to be
 *  converted into standard interface, once I finish the thought.
 *
 *  Recent changes
 *      Don't use LBA48 mode on ALi <= 0xC4
 *      Don't poke 0x79 with a non ALi northbridge
 *      Don't flip undefined bits on newer chipsets (fix Fujitsu laptop hang)
 *      Allow UDMA6 on revisions > 0xC4
 *
 *  Documentation
 *      Chipset documentation available under NDA only
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <linux/dmi.h>

#include <asm/io.h>


#define DRV_NAME "alim15x3"

/*
 *      ALi devices are not plug in. Otherwise these static values would
 *      need to go. They ought to go away anyway
 */
 

static u8 m5229_revision;

static u8 chip_is_1543c_e;

static struct pci_dev *isa_dev;



static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
{
	struct pci_dev *pdev = to_pci_dev(hwif->dev);
	int pio_fifo = 0x54 + hwif->channel;
	u8 fifo;
	int shift = 4 * (drive->dn & 1);

	pci_read_config_byte(pdev, pio_fifo, &fifo);
	fifo &= ~(0x0F << shift);
	fifo |= (on << shift);
	pci_write_config_byte(pdev, pio_fifo, fifo);
}

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static void ali_program_timings(ide_hwif_t *hwif, ide_drive_t *drive,
				struct ide_timing *t, u8 ultra)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	int port = hwif->channel ? 0x5c : 0x58;
	int udmat = 0x56 + hwif->channel;
	u8 unit = drive->dn & 1, udma;
	int shift = 4 * unit;

	/* Set up the UDMA */
	pci_read_config_byte(dev, udmat, &udma);
	udma &= ~(0x0F << shift);
	udma |= ultra << shift;
	pci_write_config_byte(dev, udmat, udma);

	if (t == NULL)
		return;

	t->setup = clamp_val(t->setup, 1, 8) & 7;
	t->act8b = clamp_val(t->act8b, 1, 8) & 7;
	t->rec8b = clamp_val(t->rec8b, 1, 16) & 15;
	t->active = clamp_val(t->active, 1, 8) & 7;
	t->recover = clamp_val(t->recover, 1, 16) & 15;

	pci_write_config_byte(dev, port, t->setup);
	pci_write_config_byte(dev, port + 1, (t->act8b << 4) | t->rec8b);
	pci_write_config_byte(dev, port + unit + 2,
			      (t->active << 4) | t->recover);
}

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/**
 *      ali_set_pio_mode        -       set host controller for PIO mode
 *      @hwif: port
 *      @drive: drive
 *
 *      Program the controller for the given PIO mode.
 */



static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
	ide_drive_t *pair = ide_get_pair_dev(drive);
	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
	unsigned long T =  1000000 / bus_speed; /* PCI clock based */
	struct ide_timing t;

	ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
	if (pair) {
		struct ide_timing p;

		ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
		ide_timing_merge(&p, &t, &t,
			IDE_TIMING_SETUP | IDE_TIMING_8BIT);
		if (pair->dma_mode) {
			ide_timing_compute(pair, pair->dma_mode, &p, T, 1);
			ide_timing_merge(&p, &t, &t,
				IDE_TIMING_SETUP | IDE_TIMING_8BIT);
		}
	}

	/* 
         * PIO mode => ATA FIFO on, ATAPI FIFO off
         */
	ali_fifo_control(hwif, drive, (drive->media == ide_disk) ? 0x05 : 0x00);

	ali_program_timings(hwif, drive, &t, 0);
}

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/**
 *      ali_udma_filter         -       compute UDMA mask
 *      @drive: IDE device
 *
 *      Return available UDMA modes.
 *
 *      The actual rules for the ALi are:
 *              No UDMA on revisions <= 0x20
 *              Disk only for revisions < 0xC2
 *              Not WDC drives on M1543C-E (?)
 */



static u8 ali_udma_filter(ide_drive_t *drive)
{
	if (m5229_revision > 0x20 && m5229_revision < 0xC2) {
		if (drive->media != ide_disk)
			return 0;
		if (chip_is_1543c_e &&
		    strstr((char *)&drive->id[ATA_ID_PROD], "WDC "))
			return 0;
	}

	return drive->hwif->ultra_mask;
}

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/**
 *      ali_set_dma_mode        -       set host controller for DMA mode
 *      @hwif: port
 *      @drive: drive
 *
 *      Configure the hardware for the desired IDE transfer mode.
 */



static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
	static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
	struct pci_dev *dev	= to_pci_dev(hwif->dev);
	ide_drive_t *pair	= ide_get_pair_dev(drive);
	int bus_speed		= ide_pci_clk ? ide_pci_clk : 33;
	unsigned long T		=  1000000 / bus_speed; /* PCI clock based */
	const u8 speed		= drive->dma_mode;
	u8 tmpbyte		= 0x00;
	struct ide_timing t;

	if (speed < XFER_UDMA_0) {
		ide_timing_compute(drive, drive->dma_mode, &t, T, 1);
		if (pair) {
			struct ide_timing p;

			ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
			ide_timing_merge(&p, &t, &t,
				IDE_TIMING_SETUP | IDE_TIMING_8BIT);
			if (pair->dma_mode) {
				ide_timing_compute(pair, pair->dma_mode,
						&p, T, 1);
				ide_timing_merge(&p, &t, &t,
					IDE_TIMING_SETUP | IDE_TIMING_8BIT);
			}
		}
		ali_program_timings(hwif, drive, &t, 0);
	} else {
		ali_program_timings(hwif, drive, NULL,
				udma_timing[speed - XFER_UDMA_0]);
		if (speed >= XFER_UDMA_3) {
			pci_read_config_byte(dev, 0x4b, &tmpbyte);
			tmpbyte |= 1;
			pci_write_config_byte(dev, 0x4b, tmpbyte);
		}
	}
}

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/**
 *      ali_dma_check   -       DMA check
 *      @drive: target device
 *      @cmd: command
 *
 *      Returns 1 if the DMA cannot be performed, zero on success.
 */



static int ali_dma_check(ide_drive_t *drive, struct ide_cmd *cmd)
{
	if (m5229_revision < 0xC2 && drive->media != ide_disk) {
		if (cmd->tf_flags & IDE_TFLAG_WRITE)
			return 1;	/* try PIO instead of DMA */
	}
	return 0;
}

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/**
 *      init_chipset_ali15x3    -       Initialise an ALi IDE controller
 *      @dev: PCI device
 *
 *      This function initializes the ALI IDE controller and where 
 *      appropriate also sets up the 1533 southbridge.
 */



static int init_chipset_ali15x3(struct pci_dev *dev)
{
	unsigned long flags;
	u8 tmpbyte;
	struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));

	m5229_revision = dev->revision;

	isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);

	local_irq_save(flags);

	if (m5229_revision < 0xC2) {
		/*
                 * revision 0x20 (1543-E, 1543-F)
                 * revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
                 * clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
                 */
		pci_read_config_byte(dev, 0x4b, &tmpbyte);
		/*
                 * clear bit 7
                 */
		pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
		/*
                 * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
                 */
		if (m5229_revision >= 0x20 && isa_dev) {
			pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
			chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
		}
		goto out;
	}

	/*
         * 1543C-B?, 1535, 1535D, 1553
         * Note 1: not all "motherboard" support this detection
         * Note 2: if no udma 66 device, the detection may "error".
         *         but in this case, we will not set the device to
         *         ultra 66, the detection result is not important
         */

	/*
         * enable "Cable Detection", m5229, 0x4b, bit3
         */
	pci_read_config_byte(dev, 0x4b, &tmpbyte);
	pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);

	/*
         * We should only tune the 1533 enable if we are using an ALi
         * North bridge. We might have no north found on some zany
         * box without a device at 0:0.0. The ALi bridge will be at
         * 0:0.0 so if we didn't find one we know what is cooking.
         */
	if (north && north->vendor != PCI_VENDOR_ID_AL)
		goto out;

	if (m5229_revision < 0xC5 && isa_dev)
	{	
		/*
                 * set south-bridge's enable bit, m1533, 0x79
                 */

		pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
		if (m5229_revision == 0xC2) {
			/*
                         * 1543C-B0 (m1533, 0x79, bit 2)
                         */
			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
		} else if (m5229_revision >= 0xC3) {
			/*
                         * 1553/1535 (m1533, 0x79, bit 1)
                         */
			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
		}
	}

out:
	/*
         * CD_ROM DMA on (m5229, 0x53, bit0)
         *      Enable this bit even if we want to use PIO.
         * PIO FIFO off (m5229, 0x53, bit1)
         *      The hardware will use 0x54h and 0x55h to control PIO FIFO.
         *      (Not on later devices it seems)
         *
         *      0x53 changes meaning on later revs - we must no touch
         *      bit 1 on them.  Need to check if 0x20 is the right break.
         */
	if (m5229_revision >= 0x20) {
		pci_read_config_byte(dev, 0x53, &tmpbyte);

		if (m5229_revision <= 0x20)
			tmpbyte = (tmpbyte & (~0x02)) | 0x01;
		else if (m5229_revision == 0xc7 || m5229_revision == 0xc8)
			tmpbyte |= 0x03;
		else
			tmpbyte |= 0x01;

		pci_write_config_byte(dev, 0x53, tmpbyte);
	}
	pci_dev_put(north);
	pci_dev_put(isa_dev);
	local_irq_restore(flags);
	return 0;
}

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/*
 *      Cable special cases
 */


static const struct dmi_system_id cable_dmi_table[] = {
	{
		.ident = "HP Pavilion N5430",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
                },
        },
	{
		.ident = "Toshiba Satellite S1800-814",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
			DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
                },
        },
	{ }
};



static int ali_cable_override(struct pci_dev *pdev)
{
	/* Fujitsu P2000 */
	if (pdev->subsystem_vendor == 0x10CF &&
	    pdev->subsystem_device == 0x10AF)
		return 1;

	/* Mitac 8317 (Winbook-A) and relatives */
	if (pdev->subsystem_vendor == 0x1071 &&
	    pdev->subsystem_device == 0x8317)
		return 1;

	/* Systems by DMI */
	if (dmi_check_system(cable_dmi_table))
		return 1;

	return 0;
}

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/**
 *      ali_cable_detect        -       cable detection
 *      @hwif: IDE interface
 *
 *      This checks if the controller and the cable are capable
 *      of UDMA66 transfers. It doesn't check the drives.
 */



static u8 ali_cable_detect(ide_hwif_t *hwif)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u8 cbl = ATA_CBL_PATA40, tmpbyte;

	if (m5229_revision >= 0xC2) {
		/*
                 * m5229 80-pin cable detection (from Host View)
                 *
                 * 0x4a bit0 is 0 => primary channel has 80-pin
                 * 0x4a bit1 is 0 => secondary channel has 80-pin
                 *
                 * Certain laptops use short but suitable cables
                 * and don't implement the detect logic.
                 */
		if (ali_cable_override(dev))
			cbl = ATA_CBL_PATA40_SHORT;
		else {
			pci_read_config_byte(dev, 0x4a, &tmpbyte);
			if ((tmpbyte & (1 << hwif->channel)) == 0)
				cbl = ATA_CBL_PATA80;
		}
	}

	return cbl;
}

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#ifndef CONFIG_SPARC64
/**
 *      init_hwif_ali15x3       -       Initialize the ALI IDE x86 stuff
 *      @hwif: interface to configure
 *
 *      Obtain the IRQ tables for an ALi based IDE solution on the PC
 *      class platforms. This part of the code isn't applicable to the
 *      Sparc systems.
 */



static void init_hwif_ali15x3(ide_hwif_t *hwif)
{
	u8 ideic, inmir;
	s8 irq_routing_table[] = { -1,  9, 3, 10, 4,  5, 7,  6,
				      1, 11, 0, 12, 0, 14, 0, 15 };
	int irq = -1;

	if (isa_dev) {
		/*
                 * read IDE interface control
                 */
		pci_read_config_byte(isa_dev, 0x58, &ideic);

		/* bit0, bit1 */
		ideic = ideic & 0x03;

		/* get IRQ for IDE Controller */
		if ((hwif->channel && ideic == 0x03) ||
		    (!hwif->channel && !ideic)) {
			/*
                         * get SIRQ1 routing table
                         */
			pci_read_config_byte(isa_dev, 0x44, &inmir);
			inmir = inmir & 0x0f;
			irq = irq_routing_table[inmir];
		} else if (hwif->channel && !(ideic & 0x01)) {
			/*
                         * get SIRQ2 routing table
                         */
			pci_read_config_byte(isa_dev, 0x75, &inmir);
			inmir = inmir & 0x0f;
			irq = irq_routing_table[inmir];
		}
		if(irq >= 0)
			hwif->irq = irq;
	}
}
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#else

#define init_hwif_ali15x3 NULL
#endif /* CONFIG_SPARC64 */

/**
 *      init_dma_ali15x3        -       set up DMA on ALi15x3
 *      @hwif: IDE interface
 *      @d: IDE port info
 *
 *      Set up the DMA functionality on the ALi 15x3.
 */



static int init_dma_ali15x3(ide_hwif_t *hwif, const struct ide_port_info *d)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	unsigned long base = ide_pci_dma_base(hwif, d);

	if (base == 0)
		return -1;

	hwif->dma_base = base;

	if (ide_pci_check_simplex(hwif, d) < 0)
		return -1;

	if (ide_pci_set_master(dev, d->name) < 0)
		return -1;

	if (!hwif->channel)
		outb(inb(base + 2) & 0x60, base + 2);

	printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
			 hwif->name, base, base + 7);

	if (ide_allocate_dma_engine(hwif))
		return -1;

	return 0;
}

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static const struct ide_port_ops ali_port_ops = {
	.set_pio_mode		= ali_set_pio_mode,
	.set_dma_mode		= ali_set_dma_mode,
	.udma_filter		= ali_udma_filter,
	.cable_detect		= ali_cable_detect,
};


static const struct ide_dma_ops ali_dma_ops = {
	.dma_host_set		= ide_dma_host_set,
	.dma_setup		= ide_dma_setup,
	.dma_start		= ide_dma_start,
	.dma_end		= ide_dma_end,
	.dma_test_irq		= ide_dma_test_irq,
	.dma_lost_irq		= ide_dma_lost_irq,
	.dma_check		= ali_dma_check,
	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
	.dma_sff_read_status	= ide_dma_sff_read_status,
};


static const struct ide_port_info ali15x3_chipset = {
	.name		= DRV_NAME,
	.init_chipset	= init_chipset_ali15x3,
	.init_hwif	= init_hwif_ali15x3,
	.init_dma	= init_dma_ali15x3,
	.port_ops	= &ali_port_ops,
	.dma_ops	= &sff_dma_ops,
	.pio_mask	= ATA_PIO5,
	.swdma_mask	= ATA_SWDMA2,
	.mwdma_mask	= ATA_MWDMA2,
};

/**
 *      alim15x3_init_one       -       set up an ALi15x3 IDE controller
 *      @dev: PCI device to set up
 *
 *      Perform the actual set up for an ALi15x3 that has been found by the
 *      hot plug layer.
 */
 


static int alim15x3_init_one(struct pci_dev *dev,
			     const struct pci_device_id *id)
{
	struct ide_port_info d = ali15x3_chipset;
	u8 rev = dev->revision, idx = id->driver_data;

	/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
	if (rev <= 0xC4)
		d.host_flags |= IDE_HFLAG_NO_LBA48_DMA;

	if (rev >= 0x20) {
		if (rev == 0x20)
			d.host_flags |= IDE_HFLAG_NO_ATAPI_DMA;

		if (rev < 0xC2)
			d.udma_mask = ATA_UDMA2;
		else if (rev == 0xC2 || rev == 0xC3)
			d.udma_mask = ATA_UDMA4;
		else if (rev == 0xC4)
			d.udma_mask = ATA_UDMA5;
		else
			d.udma_mask = ATA_UDMA6;

		d.dma_ops = &ali_dma_ops;
	} else {
		d.host_flags |= IDE_HFLAG_NO_DMA;

		d.mwdma_mask = d.swdma_mask = 0;
	}

	if (idx == 0)
		d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;

	return ide_pci_init_one(dev, &d, NULL);
}


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jens axboe
26
15.57%
3
27.27%
Total
167
100.00%
11
100.00%


static const struct pci_device_id alim15x3_pci_tbl[] = {
	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), 0 },
	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 1 },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);


static struct pci_driver alim15x3_pci_driver = {
	.name		= "ALI15x3_IDE",
	.id_table	= alim15x3_pci_tbl,
	.probe		= alim15x3_init_one,
	.remove		= ide_pci_remove,
	.suspend	= ide_pci_suspend,
	.resume		= ide_pci_resume,
};



static int __init ali15x3_ide_init(void)
{
	return ide_pci_register_driver(&alim15x3_pci_driver);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
jens axboe
jens axboe
14
87.50%
2
50.00%
bartlomiej zolnierkiewicz
bartlomiej zolnierkiewicz
2
12.50%
2
50.00%
Total
16
100.00%
4
100.00%



static void __exit ali15x3_ide_exit(void)
{
	pci_unregister_driver(&alim15x3_pci_driver);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
bartlomiej zolnierkiewicz
bartlomiej zolnierkiewicz
14
93.33%
2
66.67%
hannes eder
hannes eder
1
6.67%
1
33.33%
Total
15
100.00%
3
100.00%


module_init(ali15x3_ide_init);

module_exit(ali15x3_ide_exit);

MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox, Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
bartlomiej zolnierkiewicz
bartlomiej zolnierkiewicz
1417
63.20%
52
74.29%
jens axboe
jens axboe
688
30.69%
3
4.29%
alan cox
alan cox
42
1.87%
2
2.86%
daniel exner
daniel exner
26
1.16%
1
1.43%
linus torvalds
linus torvalds
23
1.03%
1
1.43%
ivan kokshaysky
ivan kokshaysky
13
0.58%
1
1.43%
anton vorontsov
anton vorontsov
10
0.45%
2
2.86%
sergei shtylyov
sergei shtylyov
10
0.45%
3
4.29%
luca tettamanti
luca tettamanti
6
0.27%
1
1.43%
auke kok
auke kok
4
0.18%
1
1.43%
jeff garzik
jeff garzik
1
0.04%
1
1.43%
hannes eder
hannes eder
1
0.04%
1
1.43%
deepak saxena
deepak saxena
1
0.04%
1
1.43%
greg kroah-hartman
greg kroah-hartman
0.00%
0
0.00%
Total
2242
100.00%
70
100.00%
  
Directory: drivers/ide

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