diff options
Diffstat (limited to 'drivers/ide/sc1200.c')
| -rw-r--r-- | drivers/ide/sc1200.c | 355 |
1 files changed, 0 insertions, 355 deletions
diff --git a/drivers/ide/sc1200.c b/drivers/ide/sc1200.c deleted file mode 100644 index a5b701818405..000000000000 --- a/drivers/ide/sc1200.c +++ /dev/null @@ -1,355 +0,0 @@ -/* - * Copyright (C) 2000-2002 Mark Lord <mlord@pobox.com> - * Copyright (C) 2007 Bartlomiej Zolnierkiewicz - * - * May be copied or modified under the terms of the GNU General Public License - * - * Development of this chipset driver was funded - * by the nice folks at National Semiconductor. - * - * Documentation: - * Available from National Semiconductor - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/ide.h> -#include <linux/pm.h> - -#include <asm/io.h> - -#define DRV_NAME "sc1200" - -#define SC1200_REV_A 0x00 -#define SC1200_REV_B1 0x01 -#define SC1200_REV_B3 0x02 -#define SC1200_REV_C1 0x03 -#define SC1200_REV_D1 0x04 - -#define PCI_CLK_33 0x00 -#define PCI_CLK_48 0x01 -#define PCI_CLK_66 0x02 -#define PCI_CLK_33A 0x03 - -static unsigned short sc1200_get_pci_clock (void) -{ - unsigned char chip_id, silicon_revision; - unsigned int pci_clock; - /* - * Check the silicon revision, as not all versions of the chip - * have the register with the fast PCI bus timings. - */ - chip_id = inb (0x903c); - silicon_revision = inb (0x903d); - - // Read the fast pci clock frequency - if (chip_id == 0x04 && silicon_revision < SC1200_REV_B1) { - pci_clock = PCI_CLK_33; - } else { - // check clock generator configuration (cfcc) - // the clock is in bits 8 and 9 of this word - - pci_clock = inw (0x901e); - pci_clock >>= 8; - pci_clock &= 0x03; - if (pci_clock == PCI_CLK_33A) - pci_clock = PCI_CLK_33; - } - return pci_clock; -} - -/* - * Here are the standard PIO mode 0-4 timings for each "format". - * Format-0 uses fast data reg timings, with slower command reg timings. - * Format-1 uses fast timings for all registers, but won't work with all drives. - */ -static const unsigned int sc1200_pio_timings[4][5] = - {{0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, // format0 33Mhz - {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}, // format1, 33Mhz - {0xfaa3f4f3, 0xc23232b2, 0x513101c1, 0x31213121, 0x10211021}, // format1, 48Mhz - {0xfff4fff4, 0xf35353d3, 0x814102f1, 0x42314231, 0x11311131}}; // format1, 66Mhz - -/* - * After chip reset, the PIO timings are set to 0x00009172, which is not valid. - */ -//#define SC1200_BAD_PIO(timings) (((timings)&~0x80000000)==0x00009172) - -static void sc1200_tunepio(ide_drive_t *drive, u8 pio) -{ - ide_hwif_t *hwif = drive->hwif; - struct pci_dev *pdev = to_pci_dev(hwif->dev); - unsigned int basereg = hwif->channel ? 0x50 : 0x40, format = 0; - - pci_read_config_dword(pdev, basereg + 4, &format); - format = (format >> 31) & 1; - if (format) - format += sc1200_get_pci_clock(); - pci_write_config_dword(pdev, basereg + ((drive->dn & 1) << 3), - sc1200_pio_timings[format][pio]); -} - -/* - * The SC1200 specifies that two drives sharing a cable cannot mix - * UDMA/MDMA. It has to be one or the other, for the pair, though - * different timings can still be chosen for each drive. We could - * set the appropriate timing bits on the fly, but that might be - * a bit confusing. So, for now we statically handle this requirement - * by looking at our mate drive to see what it is capable of, before - * choosing a mode for our own drive. - */ -static u8 sc1200_udma_filter(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - ide_drive_t *mate = ide_get_pair_dev(drive); - u16 *mateid; - u8 mask = hwif->ultra_mask; - - if (mate == NULL) - goto out; - mateid = mate->id; - - if (ata_id_has_dma(mateid) && __ide_dma_bad_drive(mate) == 0) { - if ((mateid[ATA_ID_FIELD_VALID] & 4) && - (mateid[ATA_ID_UDMA_MODES] & 7)) - goto out; - if (mateid[ATA_ID_MWDMA_MODES] & 7) - mask = 0; - } -out: - return mask; -} - -static void sc1200_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) -{ - struct pci_dev *dev = to_pci_dev(hwif->dev); - unsigned int reg, timings; - unsigned short pci_clock; - unsigned int basereg = hwif->channel ? 0x50 : 0x40; - const u8 mode = drive->dma_mode; - - static const u32 udma_timing[3][3] = { - { 0x00921250, 0x00911140, 0x00911030 }, - { 0x00932470, 0x00922260, 0x00922140 }, - { 0x009436a1, 0x00933481, 0x00923261 }, - }; - - static const u32 mwdma_timing[3][3] = { - { 0x00077771, 0x00012121, 0x00002020 }, - { 0x000bbbb2, 0x00024241, 0x00013131 }, - { 0x000ffff3, 0x00035352, 0x00015151 }, - }; - - pci_clock = sc1200_get_pci_clock(); - - /* - * Note that each DMA mode has several timings associated with it. - * The correct timing depends on the fast PCI clock freq. - */ - - if (mode >= XFER_UDMA_0) - timings = udma_timing[pci_clock][mode - XFER_UDMA_0]; - else - timings = mwdma_timing[pci_clock][mode - XFER_MW_DMA_0]; - - if ((drive->dn & 1) == 0) { - pci_read_config_dword(dev, basereg + 4, ®); - timings |= reg & 0x80000000; /* preserve PIO format bit */ - pci_write_config_dword(dev, basereg + 4, timings); - } else - pci_write_config_dword(dev, basereg + 12, timings); -} - -/* Replacement for the standard ide_dma_end action in - * dma_proc. - * - * returns 1 on error, 0 otherwise - */ -static int sc1200_dma_end(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - unsigned long dma_base = hwif->dma_base; - u8 dma_stat; - - dma_stat = inb(dma_base+2); /* get DMA status */ - - if (!(dma_stat & 4)) - printk(" ide_dma_end dma_stat=%0x err=%x newerr=%x\n", - dma_stat, ((dma_stat&7)!=4), ((dma_stat&2)==2)); - - outb(dma_stat|0x1b, dma_base+2); /* clear the INTR & ERROR bits */ - outb(inb(dma_base)&~1, dma_base); /* !! DO THIS HERE !! stop DMA */ - - return (dma_stat & 7) != 4; /* verify good DMA status */ -} - -/* - * sc1200_set_pio_mode() handles setting of PIO modes - * for both the chipset and drive. - * - * All existing BIOSs for this chipset guarantee that all drives - * will have valid default PIO timings set up before we get here. - */ - -static void sc1200_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) -{ - int mode = -1; - const u8 pio = drive->pio_mode - XFER_PIO_0; - - /* - * bad abuse of ->set_pio_mode interface - */ - switch (pio) { - case 200: mode = XFER_UDMA_0; break; - case 201: mode = XFER_UDMA_1; break; - case 202: mode = XFER_UDMA_2; break; - case 100: mode = XFER_MW_DMA_0; break; - case 101: mode = XFER_MW_DMA_1; break; - case 102: mode = XFER_MW_DMA_2; break; - } - if (mode != -1) { - printk("SC1200: %s: changing (U)DMA mode\n", drive->name); - ide_dma_off_quietly(drive); - if (ide_set_dma_mode(drive, mode) == 0 && - (drive->dev_flags & IDE_DFLAG_USING_DMA)) - hwif->dma_ops->dma_host_set(drive, 1); - return; - } - - sc1200_tunepio(drive, pio); -} - -#ifdef CONFIG_PM -struct sc1200_saved_state { - u32 regs[8]; -}; - -static int sc1200_suspend (struct pci_dev *dev, pm_message_t state) -{ - printk("SC1200: suspend(%u)\n", state.event); - - /* - * we only save state when going from full power to less - */ - if (state.event == PM_EVENT_ON) { - struct ide_host *host = pci_get_drvdata(dev); - struct sc1200_saved_state *ss = host->host_priv; - unsigned int r; - - /* - * save timing registers - * (this may be unnecessary if BIOS also does it) - */ - for (r = 0; r < 8; r++) - pci_read_config_dword(dev, 0x40 + r * 4, &ss->regs[r]); - } - - pci_disable_device(dev); - pci_set_power_state(dev, pci_choose_state(dev, state)); - return 0; -} - -static int sc1200_resume (struct pci_dev *dev) -{ - struct ide_host *host = pci_get_drvdata(dev); - struct sc1200_saved_state *ss = host->host_priv; - unsigned int r; - int i; - - i = pci_enable_device(dev); - if (i) - return i; - - /* - * restore timing registers - * (this may be unnecessary if BIOS also does it) - */ - for (r = 0; r < 8; r++) - pci_write_config_dword(dev, 0x40 + r * 4, ss->regs[r]); - - return 0; -} -#endif - -static const struct ide_port_ops sc1200_port_ops = { - .set_pio_mode = sc1200_set_pio_mode, - .set_dma_mode = sc1200_set_dma_mode, - .udma_filter = sc1200_udma_filter, -}; - -static const struct ide_dma_ops sc1200_dma_ops = { - .dma_host_set = ide_dma_host_set, - .dma_setup = ide_dma_setup, - .dma_start = ide_dma_start, - .dma_end = sc1200_dma_end, - .dma_test_irq = ide_dma_test_irq, - .dma_lost_irq = ide_dma_lost_irq, - .dma_timer_expiry = ide_dma_sff_timer_expiry, - .dma_sff_read_status = ide_dma_sff_read_status, -}; - -static const struct ide_port_info sc1200_chipset = { - .name = DRV_NAME, - .port_ops = &sc1200_port_ops, - .dma_ops = &sc1200_dma_ops, - .host_flags = IDE_HFLAG_SERIALIZE | - IDE_HFLAG_POST_SET_MODE | - IDE_HFLAG_ABUSE_DMA_MODES, - .pio_mask = ATA_PIO4, - .mwdma_mask = ATA_MWDMA2, - .udma_mask = ATA_UDMA2, -}; - -static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id) -{ - struct sc1200_saved_state *ss = NULL; - int rc; - -#ifdef CONFIG_PM - ss = kmalloc(sizeof(*ss), GFP_KERNEL); - if (ss == NULL) - return -ENOMEM; -#endif - rc = ide_pci_init_one(dev, &sc1200_chipset, ss); - if (rc) - kfree(ss); - - return rc; -} - -static const struct pci_device_id sc1200_pci_tbl[] = { - { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_IDE), 0}, - { 0, }, -}; -MODULE_DEVICE_TABLE(pci, sc1200_pci_tbl); - -static struct pci_driver sc1200_pci_driver = { - .name = "SC1200_IDE", - .id_table = sc1200_pci_tbl, - .probe = sc1200_init_one, - .remove = ide_pci_remove, -#ifdef CONFIG_PM - .suspend = sc1200_suspend, - .resume = sc1200_resume, -#endif -}; - -static int __init sc1200_ide_init(void) -{ - return ide_pci_register_driver(&sc1200_pci_driver); -} - -static void __exit sc1200_ide_exit(void) -{ - pci_unregister_driver(&sc1200_pci_driver); -} - -module_init(sc1200_ide_init); -module_exit(sc1200_ide_exit); - -MODULE_AUTHOR("Mark Lord"); -MODULE_DESCRIPTION("PCI driver module for NS SC1200 IDE"); -MODULE_LICENSE("GPL"); |