diff options
Diffstat (limited to 'drivers/ide/pci/cs5520.c')
| -rw-r--r-- | drivers/ide/pci/cs5520.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c deleted file mode 100644 index 7dc24682d19..00000000000 --- a/drivers/ide/pci/cs5520.c +++ /dev/null @@ -1,274 +0,0 @@ -/* - * IDE tuning and bus mastering support for the CS5510/CS5520 - * chipsets - * - * The CS5510/CS5520 are slightly unusual devices. Unlike the - * typical IDE controllers they do bus mastering with the drive in - * PIO mode and smarter silicon. - * - * The practical upshot of this is that we must always tune the - * drive for the right PIO mode. We must also ignore all the blacklists - * and the drive bus mastering DMA information. - * - * *** This driver is strictly experimental *** - * - * (c) Copyright Red Hat Inc 2002 - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2, or (at your option) any - * later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * For the avoidance of doubt the "preferred form" of this code is one which - * is in an open non patent encumbered format. Where cryptographic key signing - * forms part of the process of creating an executable the information - * including keys needed to generate an equivalently functional executable - * are deemed to be part of the source code. - * - */ - -#include <linux/config.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/timer.h> -#include <linux/mm.h> -#include <linux/ioport.h> -#include <linux/blkdev.h> -#include <linux/hdreg.h> - -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/ide.h> -#include <linux/dma-mapping.h> - -#include <asm/io.h> -#include <asm/irq.h> - -struct pio_clocks -{ - int address; - int assert; - int recovery; -}; - -static struct pio_clocks cs5520_pio_clocks[]={ - {3, 6, 11}, - {2, 5, 6}, - {1, 4, 3}, - {1, 3, 2}, - {1, 2, 1} -}; - -static int cs5520_tune_chipset(ide_drive_t *drive, u8 xferspeed) -{ - ide_hwif_t *hwif = HWIF(drive); - struct pci_dev *pdev = hwif->pci_dev; - u8 speed = min((u8)XFER_PIO_4, xferspeed); - int pio = speed; - u8 reg; - int controller = drive->dn > 1 ? 1 : 0; - int error; - - switch(speed) - { - case XFER_PIO_4: - case XFER_PIO_3: - case XFER_PIO_2: - case XFER_PIO_1: - case XFER_PIO_0: - pio -= XFER_PIO_0; - break; - default: - pio = 0; - printk(KERN_ERR "cs55x0: bad ide timing.\n"); - } - - printk("PIO clocking = %d\n", pio); - - /* FIXME: if DMA = 1 do we need to set the DMA bit here ? */ - - /* 8bit CAT/CRT - 8bit command timing for channel */ - pci_write_config_byte(pdev, 0x62 + controller, - (cs5520_pio_clocks[pio].recovery << 4) | - (cs5520_pio_clocks[pio].assert)); - - /* 0x64 - 16bit Primary, 0x68 - 16bit Secondary */ - - /* FIXME: should these use address ? */ - /* Data read timing */ - pci_write_config_byte(pdev, 0x64 + 4*controller + (drive->dn&1), - (cs5520_pio_clocks[pio].recovery << 4) | - (cs5520_pio_clocks[pio].assert)); - /* Write command timing */ - pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1), - (cs5520_pio_clocks[pio].recovery << 4) | - (cs5520_pio_clocks[pio].assert)); - - /* Set the DMA enable/disable flag */ - reg = inb(hwif->dma_base + 0x02 + 8*controller); - reg |= 1<<((drive->dn&1)+5); - outb(reg, hwif->dma_base + 0x02 + 8*controller); - - error = ide_config_drive_speed(drive, speed); - /* ATAPI is harder so leave it for now */ - if(!error && drive->media == ide_disk) - error = hwif->ide_dma_on(drive); - - return error; -} - -static void cs5520_tune_drive(ide_drive_t *drive, u8 pio) -{ - pio = ide_get_best_pio_mode(drive, pio, 4, NULL); - cs5520_tune_chipset(drive, (XFER_PIO_0 + pio)); -} - -static int cs5520_config_drive_xfer_rate(ide_drive_t *drive) -{ - ide_hwif_t *hwif = HWIF(drive); - - /* Tune the drive for PIO modes up to PIO 4 */ - cs5520_tune_drive(drive, 4); - /* Then tell the core to use DMA operations */ - return hwif->ide_dma_on(drive); -} - -/* - * We provide a callback for our nonstandard DMA location - */ - -static void __devinit cs5520_init_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif) -{ - unsigned long bmide = pci_resource_start(dev, 2); /* Not the usual 4 */ - if(hwif->mate && hwif->mate->dma_base) /* Second channel at primary + 8 */ - bmide += 8; - ide_setup_dma(hwif, bmide, 8); -} - -/* - * We wrap the DMA activate to set the vdma flag. This is needed - * so that the IDE DMA layer issues PIO not DMA commands over the - * DMA channel - */ - -static int cs5520_dma_on(ide_drive_t *drive) -{ - drive->vdma = 1; - return 0; -} - -static void __devinit init_hwif_cs5520(ide_hwif_t *hwif) -{ - hwif->tuneproc = &cs5520_tune_drive; - hwif->speedproc = &cs5520_tune_chipset; - hwif->ide_dma_check = &cs5520_config_drive_xfer_rate; - hwif->ide_dma_on = &cs5520_dma_on; - - if(!noautodma) - hwif->autodma = 1; - - if(!hwif->dma_base) - { - hwif->drives[0].autotune = 1; - hwif->drives[1].autotune = 1; - return; - } - - hwif->atapi_dma = 0; - hwif->ultra_mask = 0; - hwif->swdma_mask = 0; - hwif->mwdma_mask = 0; - - hwif->drives[0].autodma = hwif->autodma; - hwif->drives[1].autodma = hwif->autodma; -} - -#define DECLARE_CS_DEV(name_str) \ - { \ - .name = name_str, \ - .init_setup_dma = cs5520_init_setup_dma, \ - .init_hwif = init_hwif_cs5520, \ - .channels = 2, \ - .autodma = AUTODMA, \ - .bootable = ON_BOARD, \ - .flags = IDEPCI_FLAG_ISA_PORTS, \ - } - -static ide_pci_device_t cyrix_chipsets[] __devinitdata = { - /* 0 */ DECLARE_CS_DEV("Cyrix 5510"), - /* 1 */ DECLARE_CS_DEV("Cyrix 5520") -}; - -/* - * The 5510/5520 are a bit weird. They don't quite set up the way - * the PCI helper layer expects so we must do much of the set up - * work longhand. - */ - -static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id) -{ - ata_index_t index; - ide_pci_device_t *d = &cyrix_chipsets[id->driver_data]; - - ide_setup_pci_noise(dev, d); - - /* We must not grab the entire device, it has 'ISA' space in its - BARS too and we will freak out other bits of the kernel */ - if(pci_enable_device_bars(dev, 1<<2)) - { - printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name); - return 1; - } - pci_set_master(dev); - if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) { - printk(KERN_WARNING "cs5520: No suitable DMA available.\n"); - return -ENODEV; - } - - index.all = 0xf0f0; - - /* - * Now the chipset is configured we can let the core - * do all the device setup for us - */ - - ide_pci_setup_ports(dev, d, 14, &index); - - if((index.b.low & 0xf0) != 0xf0) - probe_hwif_init(&ide_hwifs[index.b.low]); - if((index.b.high & 0xf0) != 0xf0) - probe_hwif_init(&ide_hwifs[index.b.high]); - return 0; -} - -static struct pci_device_id cs5520_pci_tbl[] = { - { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5510, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, - { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, - { 0, }, -}; -MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl); - -static struct pci_driver driver = { - .name = "Cyrix_IDE", - .id_table = cs5520_pci_tbl, - .probe = cs5520_init_one, -}; - -static int cs5520_ide_init(void) -{ - return ide_pci_register_driver(&driver); -} - -module_init(cs5520_ide_init); - -MODULE_AUTHOR("Alan Cox"); -MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE"); -MODULE_LICENSE("GPL"); |