forked from Minki/linux
26bcb879c0
* Add IDE_HFLAG_ABUSE_{PREFETCH,FAST_DEVSEL,DMA_MODES} flags and set them in ht6560, cmd640, cmd64x and sc1200 host drivers. * Add set_pio_mode_abuse() for checking if host driver has a non-standard ->tuneproc() implementation and use it in do_special(). * Add ide_set_pio() for setting PIO mode (it uses hwif->pio_mask to find the maximum PIO mode supported by the host), also add ide_set_max_pio() wrapper for ide_set_pio() to use for auto-tuning. Convert users of ->tuneproc to use ide_set{_max}_pio() where possible. This leaves only do_special(), set_using_pio(), ide_hwif_restore() and ide_set_pio() as a direct users of ->tuneproc. * Remove no longer needed ide_get_best_pio_mode() calls and printk-s reporting PIO mode selected from ->tuneproc implementations. * Rename ->tuneproc hook to ->set_pio_mode and make 'pio' argument const. * Remove stale comment from ide_config_drive_speed(). v2: * Fix "ata_" prefix (Noticed by Jeff). v3: * Minor cleanups/fixups per Sergei's suggestions. v4: * Fix compile problem in drivers/ide/pci/cmd640.c (Noticed by Andrew Morton). * Improve some ->set_pio_mode comments. Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
763 lines
20 KiB
C
763 lines
20 KiB
C
/*
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* Copyright (c) 2003-2006 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/NoticeExplan
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/blkdev.h>
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#include <linux/ioc4.h>
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#include <asm/io.h>
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#include <linux/ide.h>
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/* IOC4 Specific Definitions */
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#define IOC4_CMD_OFFSET 0x100
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#define IOC4_CTRL_OFFSET 0x120
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#define IOC4_DMA_OFFSET 0x140
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#define IOC4_INTR_OFFSET 0x0
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#define IOC4_TIMING 0x00
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#define IOC4_DMA_PTR_L 0x01
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#define IOC4_DMA_PTR_H 0x02
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#define IOC4_DMA_ADDR_L 0x03
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#define IOC4_DMA_ADDR_H 0x04
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#define IOC4_BC_DEV 0x05
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#define IOC4_BC_MEM 0x06
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#define IOC4_DMA_CTRL 0x07
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#define IOC4_DMA_END_ADDR 0x08
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/* Bits in the IOC4 Control/Status Register */
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#define IOC4_S_DMA_START 0x01
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#define IOC4_S_DMA_STOP 0x02
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#define IOC4_S_DMA_DIR 0x04
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#define IOC4_S_DMA_ACTIVE 0x08
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#define IOC4_S_DMA_ERROR 0x10
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#define IOC4_ATA_MEMERR 0x02
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/* Read/Write Directions */
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#define IOC4_DMA_WRITE 0x04
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#define IOC4_DMA_READ 0x00
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/* Interrupt Register Offsets */
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#define IOC4_INTR_REG 0x03
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#define IOC4_INTR_SET 0x05
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#define IOC4_INTR_CLEAR 0x07
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#define IOC4_IDE_CACHELINE_SIZE 128
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#define IOC4_CMD_CTL_BLK_SIZE 0x20
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#define IOC4_SUPPORTED_FIRMWARE_REV 46
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typedef struct {
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u32 timing_reg0;
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u32 timing_reg1;
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u32 low_mem_ptr;
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u32 high_mem_ptr;
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u32 low_mem_addr;
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u32 high_mem_addr;
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u32 dev_byte_count;
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u32 mem_byte_count;
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u32 status;
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} ioc4_dma_regs_t;
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/* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */
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/* IOC4 has only 1 IDE channel */
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#define IOC4_PRD_BYTES 16
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#define IOC4_PRD_ENTRIES (PAGE_SIZE /(4*IOC4_PRD_BYTES))
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static void
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sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
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unsigned long ctrl_port, unsigned long irq_port)
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{
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unsigned long reg = data_port;
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int i;
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/* Registers are word (32 bit) aligned */
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for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
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hw->io_ports[i] = reg + i * 4;
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if (ctrl_port)
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hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
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if (irq_port)
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hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
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}
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static void
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sgiioc4_maskproc(ide_drive_t * drive, int mask)
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{
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writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
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(void __iomem *)IDE_CONTROL_REG);
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}
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static int
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sgiioc4_checkirq(ide_hwif_t * hwif)
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{
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unsigned long intr_addr =
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hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4;
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if ((u8)readl((void __iomem *)intr_addr) & 0x03)
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return 1;
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return 0;
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}
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static u8 sgiioc4_INB(unsigned long);
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static int
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sgiioc4_clearirq(ide_drive_t * drive)
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{
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u32 intr_reg;
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ide_hwif_t *hwif = HWIF(drive);
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unsigned long other_ir =
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hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2);
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/* Code to check for PCI error conditions */
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intr_reg = readl((void __iomem *)other_ir);
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if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */
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/*
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* Using sgiioc4_INB to read the IDE_STATUS_REG has a side effect
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* of clearing the interrupt. The first read should clear it
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* if it is set. The second read should return a "clear" status
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* if it got cleared. If not, then spin for a bit trying to
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* clear it.
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*/
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u8 stat = sgiioc4_INB(IDE_STATUS_REG);
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int count = 0;
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stat = sgiioc4_INB(IDE_STATUS_REG);
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while ((stat & 0x80) && (count++ < 100)) {
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udelay(1);
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stat = sgiioc4_INB(IDE_STATUS_REG);
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}
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if (intr_reg & 0x02) {
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/* Error when transferring DMA data on PCI bus */
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u32 pci_err_addr_low, pci_err_addr_high,
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pci_stat_cmd_reg;
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pci_err_addr_low =
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readl((void __iomem *)hwif->io_ports[IDE_IRQ_OFFSET]);
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pci_err_addr_high =
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readl((void __iomem *)(hwif->io_ports[IDE_IRQ_OFFSET] + 4));
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pci_read_config_dword(hwif->pci_dev, PCI_COMMAND,
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&pci_stat_cmd_reg);
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printk(KERN_ERR
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"%s(%s) : PCI Bus Error when doing DMA:"
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" status-cmd reg is 0x%x\n",
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__FUNCTION__, drive->name, pci_stat_cmd_reg);
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printk(KERN_ERR
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"%s(%s) : PCI Error Address is 0x%x%x\n",
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__FUNCTION__, drive->name,
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pci_err_addr_high, pci_err_addr_low);
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/* Clear the PCI Error indicator */
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pci_write_config_dword(hwif->pci_dev, PCI_COMMAND,
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0x00000146);
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}
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/* Clear the Interrupt, Error bits on the IOC4 */
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writel(0x03, (void __iomem *)other_ir);
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intr_reg = readl((void __iomem *)other_ir);
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}
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return intr_reg & 3;
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}
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static void sgiioc4_ide_dma_start(ide_drive_t * drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4;
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unsigned int reg = readl((void __iomem *)ioc4_dma_addr);
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unsigned int temp_reg = reg | IOC4_S_DMA_START;
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writel(temp_reg, (void __iomem *)ioc4_dma_addr);
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}
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static u32
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sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base)
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{
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unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
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u32 ioc4_dma;
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int count;
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count = 0;
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ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
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while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) {
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udelay(1);
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ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
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}
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return ioc4_dma;
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}
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/* Stops the IOC4 DMA Engine */
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static int
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sgiioc4_ide_dma_end(ide_drive_t * drive)
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{
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u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0;
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ide_hwif_t *hwif = HWIF(drive);
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unsigned long dma_base = hwif->dma_base;
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int dma_stat = 0;
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unsigned long *ending_dma = ide_get_hwifdata(hwif);
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writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4));
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ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
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if (ioc4_dma & IOC4_S_DMA_STOP) {
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printk(KERN_ERR
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"%s(%s): IOC4 DMA STOP bit is still 1 :"
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"ioc4_dma_reg 0x%x\n",
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__FUNCTION__, drive->name, ioc4_dma);
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dma_stat = 1;
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}
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/*
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* The IOC4 will DMA 1's to the ending dma area to indicate that
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* previous data DMA is complete. This is necessary because of relaxed
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* ordering between register reads and DMA writes on the Altix.
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*/
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while ((cnt++ < 200) && (!valid)) {
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for (num = 0; num < 16; num++) {
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if (ending_dma[num]) {
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valid = 1;
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break;
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}
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}
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udelay(1);
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}
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if (!valid) {
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printk(KERN_ERR "%s(%s) : DMA incomplete\n", __FUNCTION__,
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drive->name);
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dma_stat = 1;
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}
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bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4));
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bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4));
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if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) {
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if (bc_dev > bc_mem + 8) {
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printk(KERN_ERR
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"%s(%s): WARNING!! byte_count_dev %d "
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"!= byte_count_mem %d\n",
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__FUNCTION__, drive->name, bc_dev, bc_mem);
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}
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}
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drive->waiting_for_dma = 0;
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ide_destroy_dmatable(drive);
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return dma_stat;
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}
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static int
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sgiioc4_ide_dma_on(ide_drive_t * drive)
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{
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drive->using_dma = 1;
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return 0;
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}
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static void sgiioc4_dma_off_quietly(ide_drive_t *drive)
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{
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drive->using_dma = 0;
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drive->hwif->dma_host_off(drive);
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}
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static int sgiioc4_ide_dma_check(ide_drive_t *drive)
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{
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/* FIXME: check for available DMA modes */
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if (ide_config_drive_speed(drive, XFER_MW_DMA_2) != 0) {
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printk(KERN_WARNING "%s: couldn't set MWDMA2 mode, "
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"using PIO instead\n", drive->name);
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return -1;
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} else
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return 0;
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}
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/* returns 1 if dma irq issued, 0 otherwise */
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static int
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sgiioc4_ide_dma_test_irq(ide_drive_t * drive)
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{
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return sgiioc4_checkirq(HWIF(drive));
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}
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static void sgiioc4_dma_host_on(ide_drive_t * drive)
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{
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}
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static void sgiioc4_dma_host_off(ide_drive_t * drive)
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{
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sgiioc4_clearirq(drive);
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}
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static void
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sgiioc4_resetproc(ide_drive_t * drive)
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{
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sgiioc4_ide_dma_end(drive);
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sgiioc4_clearirq(drive);
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}
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static void
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sgiioc4_dma_lost_irq(ide_drive_t * drive)
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{
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sgiioc4_resetproc(drive);
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ide_dma_lost_irq(drive);
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}
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static u8
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sgiioc4_INB(unsigned long port)
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{
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u8 reg = (u8) readb((void __iomem *) port);
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if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */
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if (reg & 0x51) { /* Not busy...check for interrupt */
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unsigned long other_ir = port - 0x110;
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unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
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/* Clear the Interrupt, Error bits on the IOC4 */
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if (intr_reg & 0x03) {
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writel(0x03, (void __iomem *) other_ir);
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intr_reg = (u32) readl((void __iomem *) other_ir);
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}
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}
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}
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return reg;
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}
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/* Creates a dma map for the scatter-gather list entries */
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static void __devinit
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ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base)
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{
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void __iomem *virt_dma_base;
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int num_ports = sizeof (ioc4_dma_regs_t);
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void *pad;
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printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name,
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dma_base, dma_base + num_ports - 1);
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if (!request_mem_region(dma_base, num_ports, hwif->name)) {
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printk(KERN_ERR
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"%s(%s) -- ERROR, Addresses 0x%p to 0x%p "
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"ALREADY in use\n",
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__FUNCTION__, hwif->name, (void *) dma_base,
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(void *) dma_base + num_ports - 1);
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goto dma_alloc_failure;
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}
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virt_dma_base = ioremap(dma_base, num_ports);
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if (virt_dma_base == NULL) {
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printk(KERN_ERR
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"%s(%s) -- ERROR, Unable to map addresses 0x%lx to 0x%lx\n",
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__FUNCTION__, hwif->name, dma_base, dma_base + num_ports - 1);
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goto dma_remap_failure;
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}
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hwif->dma_base = (unsigned long) virt_dma_base;
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hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
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IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
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&hwif->dmatable_dma);
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if (!hwif->dmatable_cpu)
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goto dma_pci_alloc_failure;
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hwif->sg_max_nents = IOC4_PRD_ENTRIES;
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pad = pci_alloc_consistent(hwif->pci_dev, IOC4_IDE_CACHELINE_SIZE,
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(dma_addr_t *) &(hwif->dma_status));
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if (pad) {
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ide_set_hwifdata(hwif, pad);
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return;
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}
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pci_free_consistent(hwif->pci_dev,
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IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
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hwif->dmatable_cpu, hwif->dmatable_dma);
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printk(KERN_INFO
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"%s() -- Error! Unable to allocate DMA Maps for drive %s\n",
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__FUNCTION__, hwif->name);
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printk(KERN_INFO
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"Changing from DMA to PIO mode for Drive %s\n", hwif->name);
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dma_pci_alloc_failure:
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iounmap(virt_dma_base);
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dma_remap_failure:
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release_mem_region(dma_base, num_ports);
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dma_alloc_failure:
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/* Disable DMA because we couldnot allocate any DMA maps */
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hwif->autodma = 0;
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hwif->atapi_dma = 0;
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}
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/* Initializes the IOC4 DMA Engine */
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static void
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sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive)
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{
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u32 ioc4_dma;
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ide_hwif_t *hwif = HWIF(drive);
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unsigned long dma_base = hwif->dma_base;
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unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
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u32 dma_addr, ending_dma_addr;
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ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
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if (ioc4_dma & IOC4_S_DMA_ACTIVE) {
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printk(KERN_WARNING
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"%s(%s):Warning!! DMA from previous transfer was still active\n",
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__FUNCTION__, drive->name);
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writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
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ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
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if (ioc4_dma & IOC4_S_DMA_STOP)
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printk(KERN_ERR
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"%s(%s) : IOC4 Dma STOP bit is still 1\n",
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__FUNCTION__, drive->name);
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}
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ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
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if (ioc4_dma & IOC4_S_DMA_ERROR) {
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printk(KERN_WARNING
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"%s(%s) : Warning!! - DMA Error during Previous"
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" transfer | status 0x%x\n",
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__FUNCTION__, drive->name, ioc4_dma);
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writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
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ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
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|
if (ioc4_dma & IOC4_S_DMA_STOP)
|
|
printk(KERN_ERR
|
|
"%s(%s) : IOC4 DMA STOP bit is still 1\n",
|
|
__FUNCTION__, drive->name);
|
|
}
|
|
|
|
/* Address of the Scatter Gather List */
|
|
dma_addr = cpu_to_le32(hwif->dmatable_dma);
|
|
writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4));
|
|
|
|
/* Address of the Ending DMA */
|
|
memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE);
|
|
ending_dma_addr = cpu_to_le32(hwif->dma_status);
|
|
writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4));
|
|
|
|
writel(dma_direction, (void __iomem *)ioc4_dma_addr);
|
|
drive->waiting_for_dma = 1;
|
|
}
|
|
|
|
/* IOC4 Scatter Gather list Format */
|
|
/* 128 Bit entries to support 64 bit addresses in the future */
|
|
/* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */
|
|
/* --------------------------------------------------------------------- */
|
|
/* | Upper 32 bits - Zero | Lower 32 bits- address | */
|
|
/* --------------------------------------------------------------------- */
|
|
/* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */
|
|
/* --------------------------------------------------------------------- */
|
|
/* Creates the scatter gather list, DMA Table */
|
|
static unsigned int
|
|
sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
|
|
{
|
|
ide_hwif_t *hwif = HWIF(drive);
|
|
unsigned int *table = hwif->dmatable_cpu;
|
|
unsigned int count = 0, i = 1;
|
|
struct scatterlist *sg;
|
|
|
|
hwif->sg_nents = i = ide_build_sglist(drive, rq);
|
|
|
|
if (!i)
|
|
return 0; /* sglist of length Zero */
|
|
|
|
sg = hwif->sg_table;
|
|
while (i && sg_dma_len(sg)) {
|
|
dma_addr_t cur_addr;
|
|
int cur_len;
|
|
cur_addr = sg_dma_address(sg);
|
|
cur_len = sg_dma_len(sg);
|
|
|
|
while (cur_len) {
|
|
if (count++ >= IOC4_PRD_ENTRIES) {
|
|
printk(KERN_WARNING
|
|
"%s: DMA table too small\n",
|
|
drive->name);
|
|
goto use_pio_instead;
|
|
} else {
|
|
u32 bcount =
|
|
0x10000 - (cur_addr & 0xffff);
|
|
|
|
if (bcount > cur_len)
|
|
bcount = cur_len;
|
|
|
|
/* put the addr, length in
|
|
* the IOC4 dma-table format */
|
|
*table = 0x0;
|
|
table++;
|
|
*table = cpu_to_be32(cur_addr);
|
|
table++;
|
|
*table = 0x0;
|
|
table++;
|
|
|
|
*table = cpu_to_be32(bcount);
|
|
table++;
|
|
|
|
cur_addr += bcount;
|
|
cur_len -= bcount;
|
|
}
|
|
}
|
|
|
|
sg++;
|
|
i--;
|
|
}
|
|
|
|
if (count) {
|
|
table--;
|
|
*table |= cpu_to_be32(0x80000000);
|
|
return count;
|
|
}
|
|
|
|
use_pio_instead:
|
|
pci_unmap_sg(hwif->pci_dev, hwif->sg_table, hwif->sg_nents,
|
|
hwif->sg_dma_direction);
|
|
|
|
return 0; /* revert to PIO for this request */
|
|
}
|
|
|
|
static int sgiioc4_ide_dma_setup(ide_drive_t *drive)
|
|
{
|
|
struct request *rq = HWGROUP(drive)->rq;
|
|
unsigned int count = 0;
|
|
int ddir;
|
|
|
|
if (rq_data_dir(rq))
|
|
ddir = PCI_DMA_TODEVICE;
|
|
else
|
|
ddir = PCI_DMA_FROMDEVICE;
|
|
|
|
if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) {
|
|
/* try PIO instead of DMA */
|
|
ide_map_sg(drive, rq);
|
|
return 1;
|
|
}
|
|
|
|
if (rq_data_dir(rq))
|
|
/* Writes TO the IOC4 FROM Main Memory */
|
|
ddir = IOC4_DMA_READ;
|
|
else
|
|
/* Writes FROM the IOC4 TO Main Memory */
|
|
ddir = IOC4_DMA_WRITE;
|
|
|
|
sgiioc4_configure_for_dma(ddir, drive);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devinit
|
|
ide_init_sgiioc4(ide_hwif_t * hwif)
|
|
{
|
|
hwif->mmio = 1;
|
|
hwif->autodma = 1;
|
|
hwif->atapi_dma = 1;
|
|
hwif->ultra_mask = 0x0; /* Disable Ultra DMA */
|
|
hwif->mwdma_mask = 0x2; /* Multimode-2 DMA */
|
|
hwif->swdma_mask = 0x2;
|
|
hwif->pio_mask = 0x00;
|
|
hwif->set_pio_mode = NULL; /* Sets timing for PIO mode */
|
|
hwif->speedproc = NULL; /* Sets timing for DMA &/or PIO modes */
|
|
hwif->selectproc = NULL;/* Use the default routine to select drive */
|
|
hwif->reset_poll = NULL;/* No HBA specific reset_poll needed */
|
|
hwif->pre_reset = NULL; /* No HBA specific pre_set needed */
|
|
hwif->resetproc = &sgiioc4_resetproc;/* Reset DMA engine,
|
|
clear interrupts */
|
|
hwif->intrproc = NULL; /* Enable or Disable interrupt from drive */
|
|
hwif->maskproc = &sgiioc4_maskproc; /* Mask on/off NIEN register */
|
|
hwif->quirkproc = NULL;
|
|
hwif->busproc = NULL;
|
|
|
|
hwif->dma_setup = &sgiioc4_ide_dma_setup;
|
|
hwif->dma_start = &sgiioc4_ide_dma_start;
|
|
hwif->ide_dma_end = &sgiioc4_ide_dma_end;
|
|
hwif->ide_dma_check = &sgiioc4_ide_dma_check;
|
|
hwif->ide_dma_on = &sgiioc4_ide_dma_on;
|
|
hwif->dma_off_quietly = &sgiioc4_dma_off_quietly;
|
|
hwif->ide_dma_test_irq = &sgiioc4_ide_dma_test_irq;
|
|
hwif->dma_host_on = &sgiioc4_dma_host_on;
|
|
hwif->dma_host_off = &sgiioc4_dma_host_off;
|
|
hwif->dma_lost_irq = &sgiioc4_dma_lost_irq;
|
|
hwif->dma_timeout = &ide_dma_timeout;
|
|
|
|
hwif->INB = &sgiioc4_INB;
|
|
}
|
|
|
|
static int __devinit
|
|
sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d)
|
|
{
|
|
unsigned long cmd_base, dma_base, irqport;
|
|
unsigned long bar0, cmd_phys_base, ctl;
|
|
void __iomem *virt_base;
|
|
ide_hwif_t *hwif;
|
|
int h;
|
|
|
|
/*
|
|
* Find an empty HWIF; if none available, return -ENOMEM.
|
|
*/
|
|
for (h = 0; h < MAX_HWIFS; ++h) {
|
|
hwif = &ide_hwifs[h];
|
|
if (hwif->chipset == ide_unknown)
|
|
break;
|
|
}
|
|
if (h == MAX_HWIFS) {
|
|
printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", d->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Get the CmdBlk and CtrlBlk Base Registers */
|
|
bar0 = pci_resource_start(dev, 0);
|
|
virt_base = ioremap(bar0, pci_resource_len(dev, 0));
|
|
if (virt_base == NULL) {
|
|
printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
|
|
d->name, bar0);
|
|
return -ENOMEM;
|
|
}
|
|
cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET;
|
|
ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET;
|
|
irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET;
|
|
dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
|
|
|
|
cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
|
|
if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
|
|
hwif->name)) {
|
|
printk(KERN_ERR
|
|
"%s : %s -- ERROR, Addresses "
|
|
"0x%p to 0x%p ALREADY in use\n",
|
|
__FUNCTION__, hwif->name, (void *) cmd_phys_base,
|
|
(void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (hwif->io_ports[IDE_DATA_OFFSET] != cmd_base) {
|
|
/* Initialize the IO registers */
|
|
sgiioc4_init_hwif_ports(&hwif->hw, cmd_base, ctl, irqport);
|
|
memcpy(hwif->io_ports, hwif->hw.io_ports,
|
|
sizeof (hwif->io_ports));
|
|
hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
|
|
}
|
|
|
|
hwif->irq = dev->irq;
|
|
hwif->chipset = ide_pci;
|
|
hwif->pci_dev = dev;
|
|
hwif->channel = 0; /* Single Channel chip */
|
|
hwif->cds = (struct ide_pci_device_s *) d;
|
|
hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */
|
|
|
|
/* The IOC4 uses MMIO rather than Port IO. */
|
|
default_hwif_mmiops(hwif);
|
|
|
|
/* Initializing chipset IRQ Registers */
|
|
writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
|
|
|
|
ide_init_sgiioc4(hwif);
|
|
|
|
if (dma_base)
|
|
ide_dma_sgiioc4(hwif, dma_base);
|
|
else
|
|
printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n",
|
|
hwif->name, d->name);
|
|
|
|
if (probe_hwif_init(hwif))
|
|
return -EIO;
|
|
|
|
/* Create /proc/ide entries */
|
|
ide_proc_register_port(hwif);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int __devinit
|
|
pci_init_sgiioc4(struct pci_dev *dev, ide_pci_device_t * d)
|
|
{
|
|
unsigned int class_rev;
|
|
int ret;
|
|
|
|
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
|
|
class_rev &= 0xff;
|
|
printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n",
|
|
d->name, pci_name(dev), class_rev);
|
|
if (class_rev < IOC4_SUPPORTED_FIRMWARE_REV) {
|
|
printk(KERN_ERR "Skipping %s IDE controller in slot %s: "
|
|
"firmware is obsolete - please upgrade to revision"
|
|
"46 or higher\n", d->name, pci_name(dev));
|
|
ret = -EAGAIN;
|
|
goto out;
|
|
}
|
|
ret = sgiioc4_ide_setup_pci_device(dev, d);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ide_pci_device_t sgiioc4_chipset __devinitdata = {
|
|
/* Channel 0 */
|
|
.name = "SGIIOC4",
|
|
.init_hwif = ide_init_sgiioc4,
|
|
.init_dma = ide_dma_sgiioc4,
|
|
.autodma = AUTODMA,
|
|
/* SGI IOC4 doesn't have enablebits. */
|
|
.bootable = ON_BOARD,
|
|
.host_flags = IDE_HFLAG_SINGLE,
|
|
};
|
|
|
|
int
|
|
ioc4_ide_attach_one(struct ioc4_driver_data *idd)
|
|
{
|
|
/* PCI-RT does not bring out IDE connection.
|
|
* Do not attach to this particular IOC4.
|
|
*/
|
|
if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
|
|
return 0;
|
|
|
|
return pci_init_sgiioc4(idd->idd_pdev, &sgiioc4_chipset);
|
|
}
|
|
|
|
static struct ioc4_submodule ioc4_ide_submodule = {
|
|
.is_name = "IOC4_ide",
|
|
.is_owner = THIS_MODULE,
|
|
.is_probe = ioc4_ide_attach_one,
|
|
/* .is_remove = ioc4_ide_remove_one, */
|
|
};
|
|
|
|
static int __init ioc4_ide_init(void)
|
|
{
|
|
return ioc4_register_submodule(&ioc4_ide_submodule);
|
|
}
|
|
|
|
late_initcall(ioc4_ide_init); /* Call only after IDE init is done */
|
|
|
|
MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
|
|
MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
|
|
MODULE_LICENSE("GPL");
|