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Release 4.14 drivers/ide/via82cxxx.c

Directory: drivers/ide
/*
 * VIA IDE driver for Linux. Supported southbridges:
 *
 *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
 *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
 *   vt8235, vt8237, vt8237a
 *
 * Copyright (c) 2000-2002 Vojtech Pavlik
 * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
 *
 * Based on the work of:
 *      Michel Aubry
 *      Jeff Garzik
 *      Andre Hedrick
 *
 * Documentation:
 *      Obsolete device documentation publicly available from via.com.tw
 *      Current device documentation available under NDA only
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

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

#ifdef CONFIG_PPC_CHRP
#include <asm/processor.h>
#endif


#define DRV_NAME "via82cxxx"


#define VIA_IDE_ENABLE		0x40

#define VIA_IDE_CONFIG		0x41

#define VIA_FIFO_CONFIG		0x43

#define VIA_MISC_1		0x44

#define VIA_MISC_2		0x45

#define VIA_MISC_3		0x46

#define VIA_DRIVE_TIMING	0x48

#define VIA_8BIT_TIMING		0x4e

#define VIA_ADDRESS_SETUP	0x4c

#define VIA_UDMA_TIMING		0x50


#define VIA_BAD_PREQ		0x01 
/* Crashes if PREQ# till DDACK# set */

#define VIA_BAD_CLK66		0x02 
/* 66 MHz clock doesn't work correctly */

#define VIA_SET_FIFO		0x04 
/* Needs to have FIFO split set */

#define VIA_NO_UNMASK		0x08 
/* Doesn't work with IRQ unmasking on */

#define VIA_BAD_ID		0x10 
/* Has wrong vendor ID (0x1107) */

#define VIA_BAD_AST		0x20 
/* Don't touch Address Setup Timing */

#define VIA_SATA_PATA		0x80 
/* SATA/PATA combined configuration */

enum {
	
VIA_IDFLAG_SINGLE = (1 << 1), /* single channel controller */
};

/*
 * VIA SouthBridge chips.
 */


static struct via_isa_bridge {
	
char *name;
	
u16 id;
	
u8 rev_min;
	
u8 rev_max;
	
u8 udma_mask;
	
u8 flags;

} via_isa_bridges[] = {
	{ "vx855",	PCI_DEVICE_ID_VIA_VX855,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
	{ "vt8261",	PCI_DEVICE_ID_VIA_8261,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt6415",	PCI_DEVICE_ID_VIA_6415,     0x00, 0xff, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237a",	PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
	{ "vt82c686b",	PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
	{ "vt82c686a",	PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
	{ "vt82c686",	PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	{ "vt82c596b",	PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
	{ "vt82c596a",	PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586a",	PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586",	PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
	{ "vtxxxx",	PCI_DEVICE_ID_VIA_ANON,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ NULL }
};


static unsigned int via_clock;

static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };


struct via82cxxx_dev
{
	
struct via_isa_bridge *via_config;
	
unsigned int via_80w;
};

/**
 *      via_set_speed                   -       write timing registers
 *      @dev: PCI device
 *      @dn: device
 *      @timing: IDE timing data to use
 *
 *      via_set_speed writes timing values to the chipset registers
 */


static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing) { struct pci_dev *dev = to_pci_dev(hwif->dev); struct ide_host *host = pci_get_drvdata(dev); struct via82cxxx_dev *vdev = host->host_priv; u8 t; if (~vdev->via_config->flags & VIA_BAD_AST) { pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t); t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1)); pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t); } pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)), ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1)); pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn), ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1)); switch (vdev->via_config->udma_mask) { case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break; case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break; case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break; case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break; } /* Set UDMA unless device is not UDMA capable */ if (vdev->via_config->udma_mask) { u8 udma_etc; pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc); /* clear transfer mode bit */ udma_etc &= ~0x20; if (timing->udma) { /* preserve 80-wire cable detection bit */ udma_etc &= 0x10; udma_etc |= t; } pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc); } }

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PersonTokensPropCommitsCommitProp
Jens Axboe31473.36%220.00%
Bartlomiej Zolnierkiewicz7417.29%550.00%
Daniel Drake204.67%110.00%
Alan Cox112.57%110.00%
Harvey Harrison92.10%110.00%
Total428100.00%10100.00%

/** * via_set_drive - configure transfer mode * @hwif: port * @drive: Drive to set up * * via_set_drive() computes timing values configures the chipset to * a desired transfer mode. It also can be called by upper layers. */
static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive) { ide_drive_t *peer = ide_get_pair_dev(drive); struct pci_dev *dev = to_pci_dev(hwif->dev); struct ide_host *host = pci_get_drvdata(dev); struct via82cxxx_dev *vdev = host->host_priv; struct ide_timing t, p; unsigned int T, UT; const u8 speed = drive->dma_mode; T = 1000000000 / via_clock; switch (vdev->via_config->udma_mask) { case ATA_UDMA2: UT = T; break; case ATA_UDMA4: UT = T/2; break; case ATA_UDMA5: UT = T/3; break; case ATA_UDMA6: UT = T/4; break; default: UT = T; } ide_timing_compute(drive, speed, &t, T, UT); if (peer) { ide_timing_compute(peer, peer->pio_mode, &p, T, UT); ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT); } via_set_speed(hwif, drive->dn, &t); }

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Jens Axboe13971.28%19.09%
Bartlomiej Zolnierkiewicz4824.62%981.82%
Daniel Drake84.10%19.09%
Total195100.00%11100.00%

/** * via_set_pio_mode - set host controller for PIO mode * @hwif: port * @drive: drive * * A callback from the upper layers for PIO-only tuning. */
static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) { drive->dma_mode = drive->pio_mode; via_set_drive(hwif, drive); }

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Bartlomiej Zolnierkiewicz1758.62%375.00%
Jens Axboe1241.38%125.00%
Total29100.00%4100.00%


static struct via_isa_bridge *via_config_find(struct pci_dev **isa) { struct via_isa_bridge *via_config; for (via_config = via_isa_bridges; via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++) if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA + !!(via_config->flags & VIA_BAD_ID), via_config->id, NULL))) { if ((*isa)->revision >= via_config->rev_min && (*isa)->revision <= via_config->rev_max) break; pci_dev_put(*isa); } return via_config; }

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PersonTokensPropCommitsCommitProp
Jens Axboe6566.33%233.33%
Auke-Jan H Kok1212.24%116.67%
Daniel Drake1212.24%116.67%
Alan Cox77.14%116.67%
Bartlomiej Zolnierkiewicz22.04%116.67%
Total98100.00%6100.00%

/* * Check and handle 80-wire cable presence */
static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u) { int i; switch (vdev->via_config->udma_mask) { case ATA_UDMA4: for (i = 24; i >= 0; i -= 8) if (((u >> (i & 16)) & 8) && ((u >> i) & 0x20) && (((u >> i) & 7) < 2)) { /* * 2x PCI clock and * UDMA w/ < 3T/cycle */ vdev->via_80w |= (1 << (1 - (i >> 4))); } break; case ATA_UDMA5: for (i = 24; i >= 0; i -= 8) if (((u >> i) & 0x10) || (((u >> i) & 0x20) && (((u >> i) & 7) < 4))) { /* BIOS 80-wire bit or * UDMA w/ < 60ns/cycle */ vdev->via_80w |= (1 << (1 - (i >> 4))); } break; case ATA_UDMA6: for (i = 24; i >= 0; i -= 8) if (((u >> i) & 0x10) || (((u >> i) & 0x20) && (((u >> i) & 7) < 6))) { /* BIOS 80-wire bit or * UDMA w/ < 60ns/cycle */ vdev->via_80w |= (1 << (1 - (i >> 4))); } break; } }

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Daniel Drake15559.62%120.00%
Bartlomiej Zolnierkiewicz8633.08%360.00%
Jens Axboe197.31%120.00%
Total260100.00%5100.00%

/** * init_chipset_via82cxxx - initialization handler * @dev: PCI device * * The initialization callback. Here we determine the IDE chip type * and initialize its drive independent registers. */
static int init_chipset_via82cxxx(struct pci_dev *dev) { struct ide_host *host = pci_get_drvdata(dev); struct via82cxxx_dev *vdev = host->host_priv; struct via_isa_bridge *via_config = vdev->via_config; u8 t, v; u32 u; /* * Detect cable and configure Clk66 */ pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); via_cable_detect(vdev, u); if (via_config->udma_mask == ATA_UDMA4) { /* Enable Clk66 */ pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008); } else if (via_config->flags & VIA_BAD_CLK66) { /* Would cause trouble on 596a and 686 */ pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008); } /* * Check whether interfaces are enabled. */ pci_read_config_byte(dev, VIA_IDE_ENABLE, &v); /* * Set up FIFO sizes and thresholds. */ pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t); /* Disable PREQ# till DDACK# */ if (via_config->flags & VIA_BAD_PREQ) { /* Would crash on 586b rev 41 */ t &= 0x7f; } /* Fix FIFO split between channels */ if (via_config->flags & VIA_SET_FIFO) { t &= (t & 0x9f); switch (v & 3) { case 2: t |= 0x00; break; /* 16 on primary */ case 1: t |= 0x60; break; /* 16 on secondary */ case 3: t |= 0x20; break; /* 8 pri 8 sec */ } } pci_write_config_byte(dev, VIA_FIFO_CONFIG, t); return 0; }

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Bartlomiej Zolnierkiewicz19490.23%480.00%
Daniel Drake219.77%120.00%
Total215100.00%5100.00%

/* * Cable special cases */ static const struct dmi_system_id cable_dmi_table[] = { { .ident = "Acer Ferrari 3400", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."), DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"), }, }, { } };
static int via_cable_override(struct pci_dev *pdev) { /* Systems by DMI */ if (dmi_check_system(cable_dmi_table)) return 1; /* Arima W730-K8/Targa Visionary 811/... */ if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032) return 1; return 0; }

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Bartlomiej Zolnierkiewicz43100.00%2100.00%
Total43100.00%2100.00%


static u8 via82cxxx_cable_detect(ide_hwif_t *hwif) { struct pci_dev *pdev = to_pci_dev(hwif->dev); struct ide_host *host = pci_get_drvdata(pdev); struct via82cxxx_dev *vdev = host->host_priv; if (via_cable_override(pdev)) return ATA_CBL_PATA40_SHORT; if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0) return ATA_CBL_SATA; if ((vdev->via_80w >> hwif->channel) & 1) return ATA_CBL_PATA80; else return ATA_CBL_PATA40; }

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Bartlomiej Zolnierkiewicz93100.00%5100.00%
Total93100.00%5100.00%

static const struct ide_port_ops via_port_ops = { .set_pio_mode = via_set_pio_mode, .set_dma_mode = via_set_drive, .cable_detect = via82cxxx_cable_detect, }; static const struct ide_port_info via82cxxx_chipset = { .name = DRV_NAME, .init_chipset = init_chipset_via82cxxx, .enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } }, .port_ops = &via_port_ops, .host_flags = IDE_HFLAG_PIO_NO_BLACKLIST | IDE_HFLAG_POST_SET_MODE | IDE_HFLAG_IO_32BIT, .pio_mask = ATA_PIO5, .swdma_mask = ATA_SWDMA2, .mwdma_mask = ATA_MWDMA2, };
static int via_init_one(struct pci_dev *dev, const struct pci_device_id *id) { struct pci_dev *isa = NULL; struct via_isa_bridge *via_config; struct via82cxxx_dev *vdev; int rc; u8 idx = id->driver_data; struct ide_port_info d; d = via82cxxx_chipset; /* * Find the ISA bridge and check we know what it is. */ via_config = via_config_find(&isa); /* * Print the boot message. */ printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n", pci_name(dev), via_config->name, isa->revision, via_config->udma_mask ? "U" : "MW", via_dma[via_config->udma_mask ? (fls(via_config->udma_mask) - 1) : 0]); pci_dev_put(isa); /* * Determine system bus clock. */ via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000; switch (via_clock) { case 33000: via_clock = 33333; break; case 37000: via_clock = 37500; break; case 41000: via_clock = 41666; break; } if (via_clock < 20000 || via_clock > 50000) { printk(KERN_WARNING DRV_NAME ": User given PCI clock speed " "impossible (%d), using 33 MHz instead.\n", via_clock); via_clock = 33333; } if (idx == 1) d.enablebits[1].reg = d.enablebits[0].reg = 0; else d.host_flags |= IDE_HFLAG_NO_AUTODMA; if (idx == VIA_IDFLAG_SINGLE) d.host_flags |= IDE_HFLAG_SINGLE; if ((via_config->flags & VIA_NO_UNMASK) == 0) d.host_flags |= IDE_HFLAG_UNMASK_IRQS; d.udma_mask = via_config->udma_mask; vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); if (!vdev) { printk(KERN_ERR DRV_NAME " %s: out of memory :(\n", pci_name(dev)); return -ENOMEM; } vdev->via_config = via_config; rc = ide_pci_init_one(dev, &d, vdev); if (rc) kfree(vdev); return rc; }

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Bartlomiej Zolnierkiewicz25186.25%1280.00%
Alan Cox217.22%16.67%
Jens Axboe196.53%213.33%
Total291100.00%15100.00%


static void via_remove(struct pci_dev *dev) { struct ide_host *host = pci_get_drvdata(dev); struct via82cxxx_dev *vdev = host->host_priv; ide_pci_remove(dev); kfree(vdev); }

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Bartlomiej Zolnierkiewicz40100.00%1100.00%
Total40100.00%1100.00%

static const struct pci_device_id via_pci_tbl[] = { { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_VX855_IDE), VIA_IDFLAG_SINGLE }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6415), 1 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 }, { 0, }, }; MODULE_DEVICE_TABLE(pci, via_pci_tbl); static struct pci_driver via_pci_driver = { .name = "VIA_IDE", .id_table = via_pci_tbl, .probe = via_init_one, .remove = via_remove, .suspend = ide_pci_suspend, .resume = ide_pci_resume, };
static int __init via_ide_init(void) { return ide_pci_register_driver(&via_pci_driver); }

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Jens Axboe1487.50%250.00%
Bartlomiej Zolnierkiewicz212.50%250.00%
Total16100.00%4100.00%


static void __exit via_ide_exit(void) { pci_unregister_driver(&via_pci_driver); }

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Bartlomiej Zolnierkiewicz15100.00%2100.00%
Total15100.00%2100.00%

module_init(via_ide_init); module_exit(via_ide_exit); MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz, Michel Aubry, Jeff Garzik, Andre Hedrick"); MODULE_DESCRIPTION("PCI driver module for VIA IDE"); MODULE_LICENSE("GPL");

Overall Contributors

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Bartlomiej Zolnierkiewicz119545.80%4766.20%
Jens Axboe97737.45%34.23%
Daniel Drake2429.28%22.82%
Alan Cox572.18%45.63%
Joseph Chan431.65%22.82%
Harald Welte240.92%11.41%
Mathias Kretschmer180.69%11.41%
Auke-Jan H Kok120.46%11.41%
Andrew Smith110.42%11.41%
Harvey Harrison90.34%11.41%
Benjamin Herrenschmidt70.27%11.41%
Luca Tettamanti60.23%11.41%
Tejun Heo30.11%11.41%
Deepak Saxena10.04%11.41%
Lucas De Marchi10.04%11.41%
Jeff Garzik10.04%11.41%
Yann Dirson10.04%11.41%
Sascha Hauer10.04%11.41%
Greg Kroah-Hartman0.00%00.00%
Total2609100.00%71100.00%
Directory: drivers/ide
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