598 lines
15 KiB
C
598 lines
15 KiB
C
/*
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* Libata driver for the highpoint 372N and 302N UDMA66 ATA controllers.
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*
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* This driver is heavily based upon:
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*
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* linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
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*
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* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
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* Portions Copyright (C) 2001 Sun Microsystems, Inc.
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* Portions Copyright (C) 2003 Red Hat Inc
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*
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*
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* TODO
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* 371N
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* Work out best PLL policy
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_hpt3x2n"
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#define DRV_VERSION "0.3"
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enum {
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HPT_PCI_FAST = (1 << 31),
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PCI66 = (1 << 1),
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USE_DPLL = (1 << 0)
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};
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struct hpt_clock {
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u8 xfer_speed;
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u32 timing;
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};
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struct hpt_chip {
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const char *name;
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struct hpt_clock *clocks[3];
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};
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/* key for bus clock timings
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* bit
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* 0:3 data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
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* DMA. cycles = value + 1
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* 4:8 data_low_time. active time of DIOW_/DIOR_ for PIO and MW
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* DMA. cycles = value + 1
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* 9:12 cmd_high_time. inactive time of DIOW_/DIOR_ during task file
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* register access.
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* 13:17 cmd_low_time. active time of DIOW_/DIOR_ during task file
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* register access.
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* 18:21 udma_cycle_time. clock freq and clock cycles for UDMA xfer.
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* during task file register access.
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* 22:24 pre_high_time. time to initialize 1st cycle for PIO and MW DMA
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* xfer.
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* 25:27 cmd_pre_high_time. time to initialize 1st PIO cycle for task
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* register access.
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* 28 UDMA enable
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* 29 DMA enable
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* 30 PIO_MST enable. if set, the chip is in bus master mode during
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* PIO.
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* 31 FIFO enable.
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*/
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/* 66MHz DPLL clocks */
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static struct hpt_clock hpt3x2n_clocks[] = {
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{ XFER_UDMA_7, 0x1c869c62 },
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{ XFER_UDMA_6, 0x1c869c62 },
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{ XFER_UDMA_5, 0x1c8a9c62 },
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{ XFER_UDMA_4, 0x1c8a9c62 },
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{ XFER_UDMA_3, 0x1c8e9c62 },
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{ XFER_UDMA_2, 0x1c929c62 },
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{ XFER_UDMA_1, 0x1c9a9c62 },
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{ XFER_UDMA_0, 0x1c829c62 },
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{ XFER_MW_DMA_2, 0x2c829c62 },
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{ XFER_MW_DMA_1, 0x2c829c66 },
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{ XFER_MW_DMA_0, 0x2c829d2c },
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{ XFER_PIO_4, 0x0c829c62 },
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{ XFER_PIO_3, 0x0c829c84 },
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{ XFER_PIO_2, 0x0c829ca6 },
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{ XFER_PIO_1, 0x0d029d26 },
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{ XFER_PIO_0, 0x0d029d5e },
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{ 0, 0x0d029d5e }
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};
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/**
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* hpt3x2n_find_mode - reset the hpt3x2n bus
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* @ap: ATA port
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* @speed: transfer mode
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*
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* Return the 32bit register programming information for this channel
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* that matches the speed provided. For the moment the clocks table
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* is hard coded but easy to change. This will be needed if we use
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* different DPLLs
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*/
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static u32 hpt3x2n_find_mode(struct ata_port *ap, int speed)
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{
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struct hpt_clock *clocks = hpt3x2n_clocks;
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while(clocks->xfer_speed) {
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if (clocks->xfer_speed == speed)
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return clocks->timing;
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clocks++;
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}
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BUG();
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return 0xffffffffU; /* silence compiler warning */
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}
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/**
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* hpt3x2n_pre_reset - reset the hpt3x2n bus
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* @ap: ATA port to reset
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*
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* Perform the initial reset handling for the 3x2n series controllers.
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* Reset the hardware and state machine, obtain the cable type.
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*/
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static int hpt3xn_pre_reset(struct ata_port *ap)
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{
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u8 scr2, ata66;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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pci_read_config_byte(pdev, 0x5B, &scr2);
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pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
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/* Cable register now active */
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pci_read_config_byte(pdev, 0x5A, &ata66);
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/* Restore state */
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pci_write_config_byte(pdev, 0x5B, scr2);
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if (ata66 & (1 << ap->port_no))
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ap->cbl = ATA_CBL_PATA40;
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else
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ap->cbl = ATA_CBL_PATA80;
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/* Reset the state machine */
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pci_write_config_byte(pdev, 0x50, 0x37);
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pci_write_config_byte(pdev, 0x54, 0x37);
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udelay(100);
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return ata_std_prereset(ap);
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}
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/**
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* hpt3x2n_error_handler - probe the hpt3x2n bus
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* @ap: ATA port to reset
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*
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* Perform the probe reset handling for the 3x2N
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*/
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static void hpt3x2n_error_handler(struct ata_port *ap)
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{
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ata_bmdma_drive_eh(ap, hpt3xn_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/**
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* hpt3x2n_set_piomode - PIO setup
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* @ap: ATA interface
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* @adev: device on the interface
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*
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* Perform PIO mode setup.
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*/
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static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 addr1, addr2;
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u32 reg;
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u32 mode;
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u8 fast;
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addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
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addr2 = 0x51 + 4 * ap->port_no;
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/* Fast interrupt prediction disable, hold off interrupt disable */
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pci_read_config_byte(pdev, addr2, &fast);
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fast &= ~0x07;
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pci_write_config_byte(pdev, addr2, fast);
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pci_read_config_dword(pdev, addr1, ®);
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mode = hpt3x2n_find_mode(ap, adev->pio_mode);
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mode &= ~0x8000000; /* No FIFO in PIO */
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mode &= ~0x30070000; /* Leave config bits alone */
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reg &= 0x30070000; /* Strip timing bits */
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pci_write_config_dword(pdev, addr1, reg | mode);
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}
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/**
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* hpt3x2n_set_dmamode - DMA timing setup
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* @ap: ATA interface
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* @adev: Device being configured
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*
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* Set up the channel for MWDMA or UDMA modes. Much the same as with
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* PIO, load the mode number and then set MWDMA or UDMA flag.
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*/
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static void hpt3x2n_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 addr1, addr2;
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u32 reg;
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u32 mode;
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u8 fast;
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addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
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addr2 = 0x51 + 4 * ap->port_no;
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/* Fast interrupt prediction disable, hold off interrupt disable */
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pci_read_config_byte(pdev, addr2, &fast);
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fast &= ~0x07;
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pci_write_config_byte(pdev, addr2, fast);
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pci_read_config_dword(pdev, addr1, ®);
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mode = hpt3x2n_find_mode(ap, adev->dma_mode);
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mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
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mode &= ~0xC0000000; /* Leave config bits alone */
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reg &= 0xC0000000; /* Strip timing bits */
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pci_write_config_dword(pdev, addr1, reg | mode);
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}
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/**
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* hpt3x2n_bmdma_end - DMA engine stop
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* @qc: ATA command
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*
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* Clean up after the HPT3x2n and later DMA engine
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*/
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static void hpt3x2n_bmdma_stop(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int mscreg = 0x50 + 2 * ap->port_no;
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u8 bwsr_stat, msc_stat;
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pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
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pci_read_config_byte(pdev, mscreg, &msc_stat);
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if (bwsr_stat & (1 << ap->port_no))
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pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
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ata_bmdma_stop(qc);
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}
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/**
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* hpt3x2n_set_clock - clock control
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* @ap: ATA port
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* @source: 0x21 or 0x23 for PLL or PCI sourced clock
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*
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* Switch the ATA bus clock between the PLL and PCI clock sources
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* while correctly isolating the bus and resetting internal logic
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*
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* We must use the DPLL for
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* - writing
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* - second channel UDMA7 (SATA ports) or higher
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* - 66MHz PCI
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*
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* or we will underclock the device and get reduced performance.
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*/
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static void hpt3x2n_set_clock(struct ata_port *ap, int source)
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{
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unsigned long bmdma = ap->ioaddr.bmdma_addr;
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/* Tristate the bus */
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outb(0x80, bmdma+0x73);
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outb(0x80, bmdma+0x77);
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/* Switch clock and reset channels */
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outb(source, bmdma+0x7B);
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outb(0xC0, bmdma+0x79);
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/* Reset state machines */
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outb(0x37, bmdma+0x70);
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outb(0x37, bmdma+0x74);
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/* Complete reset */
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outb(0x00, bmdma+0x79);
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/* Reconnect channels to bus */
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outb(0x00, bmdma+0x73);
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outb(0x00, bmdma+0x77);
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}
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/* Check if our partner interface is busy */
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static int hpt3x2n_pair_idle(struct ata_port *ap)
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{
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struct ata_host *host = ap->host;
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struct ata_port *pair = host->ports[ap->port_no ^ 1];
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if (pair->hsm_task_state == HSM_ST_IDLE)
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return 1;
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return 0;
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}
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static int hpt3x2n_use_dpll(struct ata_port *ap, int reading)
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{
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long flags = (long)ap->host->private_data;
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/* See if we should use the DPLL */
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if (reading == 0)
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return USE_DPLL; /* Needed for write */
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if (flags & PCI66)
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return USE_DPLL; /* Needed at 66Mhz */
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return 0;
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}
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static unsigned int hpt3x2n_qc_issue_prot(struct ata_queued_cmd *qc)
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{
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struct ata_taskfile *tf = &qc->tf;
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struct ata_port *ap = qc->ap;
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int flags = (long)ap->host->private_data;
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if (hpt3x2n_pair_idle(ap)) {
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int dpll = hpt3x2n_use_dpll(ap, (tf->flags & ATA_TFLAG_WRITE));
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if ((flags & USE_DPLL) != dpll) {
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if (dpll == 1)
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hpt3x2n_set_clock(ap, 0x21);
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else
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hpt3x2n_set_clock(ap, 0x23);
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}
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}
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return ata_qc_issue_prot(qc);
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}
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static struct scsi_host_template hpt3x2n_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.ioctl = ata_scsi_ioctl,
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.queuecommand = ata_scsi_queuecmd,
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.can_queue = ATA_DEF_QUEUE,
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.this_id = ATA_SHT_THIS_ID,
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.sg_tablesize = LIBATA_MAX_PRD,
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.max_sectors = ATA_MAX_SECTORS,
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.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
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.emulated = ATA_SHT_EMULATED,
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.use_clustering = ATA_SHT_USE_CLUSTERING,
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.proc_name = DRV_NAME,
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.dma_boundary = ATA_DMA_BOUNDARY,
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.slave_configure = ata_scsi_slave_config,
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.bios_param = ata_std_bios_param,
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};
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/*
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* Configuration for HPT3x2n.
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*/
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static struct ata_port_operations hpt3x2n_port_ops = {
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.port_disable = ata_port_disable,
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.set_piomode = hpt3x2n_set_piomode,
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.set_dmamode = hpt3x2n_set_dmamode,
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.mode_filter = ata_pci_default_filter,
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.tf_load = ata_tf_load,
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.tf_read = ata_tf_read,
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.check_status = ata_check_status,
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.exec_command = ata_exec_command,
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.dev_select = ata_std_dev_select,
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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = hpt3x2n_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = ata_bmdma_start,
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.bmdma_stop = hpt3x2n_bmdma_stop,
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.bmdma_status = ata_bmdma_status,
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.qc_prep = ata_qc_prep,
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.qc_issue = hpt3x2n_qc_issue_prot,
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.data_xfer = ata_pio_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.port_start = ata_port_start,
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.port_stop = ata_port_stop,
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.host_stop = ata_host_stop
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};
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/**
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* hpt3xn_calibrate_dpll - Calibrate the DPLL loop
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* @dev: PCI device
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*
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* Perform a calibration cycle on the HPT3xN DPLL. Returns 1 if this
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* succeeds
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*/
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static int hpt3xn_calibrate_dpll(struct pci_dev *dev)
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{
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u8 reg5b;
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u32 reg5c;
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int tries;
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for(tries = 0; tries < 0x5000; tries++) {
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udelay(50);
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pci_read_config_byte(dev, 0x5b, ®5b);
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if (reg5b & 0x80) {
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/* See if it stays set */
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for(tries = 0; tries < 0x1000; tries ++) {
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pci_read_config_byte(dev, 0x5b, ®5b);
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/* Failed ? */
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if ((reg5b & 0x80) == 0)
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return 0;
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}
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/* Turn off tuning, we have the DPLL set */
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pci_read_config_dword(dev, 0x5c, ®5c);
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pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
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return 1;
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}
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}
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/* Never went stable */
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return 0;
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}
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static int hpt3x2n_pci_clock(struct pci_dev *pdev)
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{
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unsigned long freq;
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u32 fcnt;
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pci_read_config_dword(pdev, 0x70/*CHECKME*/, &fcnt);
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if ((fcnt >> 12) != 0xABCDE) {
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printk(KERN_WARNING "hpt3xn: BIOS clock data not set.\n");
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return 33; /* Not BIOS set */
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}
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fcnt &= 0x1FF;
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freq = (fcnt * 77) / 192;
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/* Clamp to bands */
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if (freq < 40)
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return 33;
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if (freq < 45)
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return 40;
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if (freq < 55)
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return 50;
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return 66;
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}
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/**
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* hpt3x2n_init_one - Initialise an HPT37X/302
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* @dev: PCI device
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* @id: Entry in match table
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*
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* Initialise an HPT3x2n device. There are some interesting complications
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* here. Firstly the chip may report 366 and be one of several variants.
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* Secondly all the timings depend on the clock for the chip which we must
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* detect and look up
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*
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* This is the known chip mappings. It may be missing a couple of later
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* releases.
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*
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* Chip version PCI Rev Notes
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* HPT372 4 (HPT366) 5 Other driver
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* HPT372N 4 (HPT366) 6 UDMA133
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* HPT372 5 (HPT372) 1 Other driver
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* HPT372N 5 (HPT372) 2 UDMA133
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* HPT302 6 (HPT302) * Other driver
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* HPT302N 6 (HPT302) > 1 UDMA133
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* HPT371 7 (HPT371) * Other driver
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* HPT371N 7 (HPT371) > 1 UDMA133
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* HPT374 8 (HPT374) * Other driver
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* HPT372N 9 (HPT372N) * UDMA133
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*
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* (1) UDMA133 support depends on the bus clock
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*
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* To pin down HPT371N
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*/
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static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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/* HPT372N and friends - UDMA133 */
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static struct ata_port_info info = {
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.sht = &hpt3x2n_sht,
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.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
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.pio_mask = 0x1f,
|
|
.mwdma_mask = 0x07,
|
|
.udma_mask = 0x7f,
|
|
.port_ops = &hpt3x2n_port_ops
|
|
};
|
|
struct ata_port_info *port_info[2];
|
|
struct ata_port_info *port = &info;
|
|
|
|
u8 irqmask;
|
|
u32 class_rev;
|
|
|
|
unsigned int pci_mhz;
|
|
unsigned int f_low, f_high;
|
|
int adjust;
|
|
|
|
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
|
|
class_rev &= 0xFF;
|
|
|
|
switch(dev->device) {
|
|
case PCI_DEVICE_ID_TTI_HPT366:
|
|
if (class_rev < 6)
|
|
return -ENODEV;
|
|
break;
|
|
case PCI_DEVICE_ID_TTI_HPT372:
|
|
/* 372N if rev >= 1*/
|
|
if (class_rev == 0)
|
|
return -ENODEV;
|
|
break;
|
|
case PCI_DEVICE_ID_TTI_HPT302:
|
|
if (class_rev < 2)
|
|
return -ENODEV;
|
|
break;
|
|
case PCI_DEVICE_ID_TTI_HPT372N:
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "pata_hpt3x2n: PCI table is bogus please report (%d).\n", dev->device);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Ok so this is a chip we support */
|
|
|
|
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
|
|
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
|
|
pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
|
|
pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
|
|
|
|
pci_read_config_byte(dev, 0x5A, &irqmask);
|
|
irqmask &= ~0x10;
|
|
pci_write_config_byte(dev, 0x5a, irqmask);
|
|
|
|
/* Tune the PLL. HPT recommend using 75 for SATA, 66 for UDMA133 or
|
|
50 for UDMA100. Right now we always use 66 */
|
|
|
|
pci_mhz = hpt3x2n_pci_clock(dev);
|
|
|
|
f_low = (pci_mhz * 48) / 66; /* PCI Mhz for 66Mhz DPLL */
|
|
f_high = f_low + 2; /* Tolerance */
|
|
|
|
pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
|
|
/* PLL clock */
|
|
pci_write_config_byte(dev, 0x5B, 0x21);
|
|
|
|
/* Unlike the 37x we don't try jiggling the frequency */
|
|
for(adjust = 0; adjust < 8; adjust++) {
|
|
if (hpt3xn_calibrate_dpll(dev))
|
|
break;
|
|
pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
|
|
}
|
|
if (adjust == 8)
|
|
printk(KERN_WARNING "hpt3xn: DPLL did not stabilize.\n");
|
|
|
|
/* Set our private data up. We only need a few flags so we use
|
|
it directly */
|
|
port->private_data = NULL;
|
|
if (pci_mhz > 60)
|
|
port->private_data = (void *)PCI66;
|
|
|
|
/* Now kick off ATA set up */
|
|
port_info[0] = port_info[1] = port;
|
|
return ata_pci_init_one(dev, port_info, 2);
|
|
}
|
|
|
|
static struct pci_device_id hpt3x2n[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT366), },
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT372), },
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT302), },
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT372N), },
|
|
{ 0, },
|
|
};
|
|
|
|
static struct pci_driver hpt3x2n_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = hpt3x2n,
|
|
.probe = hpt3x2n_init_one,
|
|
.remove = ata_pci_remove_one
|
|
};
|
|
|
|
static int __init hpt3x2n_init(void)
|
|
{
|
|
return pci_register_driver(&hpt3x2n_pci_driver);
|
|
}
|
|
|
|
|
|
static void __exit hpt3x2n_exit(void)
|
|
{
|
|
pci_unregister_driver(&hpt3x2n_pci_driver);
|
|
}
|
|
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for the Highpoint HPT3x2n/30x");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, hpt3x2n);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(hpt3x2n_init);
|
|
module_exit(hpt3x2n_exit);
|