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556 lines
14 KiB
556 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver |
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* |
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* (C) 2009 Google Inc. John(Jung-Ik) Lee <[email protected]> |
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* |
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* Per Atp867 data sheet rev 1.2, Acard. |
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* Based in part on early ide code from |
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* 2003-2004 by Eric Uhrhane, Google, Inc. |
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* |
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* TODO: |
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* 1. RAID features [comparison, XOR, striping, mirroring, etc.] |
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*/ |
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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/blkdev.h> |
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#include <linux/delay.h> |
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#include <linux/device.h> |
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#include <linux/gfp.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_atp867x" |
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#define DRV_VERSION "0.7.5" |
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/* |
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* IO Registers |
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* Note that all runtime hot priv ports are cached in ap private_data |
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*/ |
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enum { |
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ATP867X_IO_CHANNEL_OFFSET = 0x10, |
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|
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/* |
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* IO Register Bitfields |
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*/ |
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ATP867X_IO_PIOSPD_ACTIVE_SHIFT = 4, |
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ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0, |
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ATP867X_IO_DMAMODE_MSTR_SHIFT = 0, |
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ATP867X_IO_DMAMODE_MSTR_MASK = 0x07, |
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ATP867X_IO_DMAMODE_SLAVE_SHIFT = 4, |
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ATP867X_IO_DMAMODE_SLAVE_MASK = 0x70, |
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ATP867X_IO_DMAMODE_UDMA_6 = 0x07, |
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ATP867X_IO_DMAMODE_UDMA_5 = 0x06, |
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ATP867X_IO_DMAMODE_UDMA_4 = 0x05, |
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ATP867X_IO_DMAMODE_UDMA_3 = 0x04, |
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ATP867X_IO_DMAMODE_UDMA_2 = 0x03, |
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ATP867X_IO_DMAMODE_UDMA_1 = 0x02, |
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ATP867X_IO_DMAMODE_UDMA_0 = 0x01, |
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ATP867X_IO_DMAMODE_DISABLE = 0x00, |
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ATP867X_IO_SYS_INFO_66MHZ = 0x04, |
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ATP867X_IO_SYS_INFO_SLOW_UDMA5 = 0x02, |
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ATP867X_IO_SYS_MASK_RESERVED = (~0xf1), |
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ATP867X_IO_PORTSPD_VAL = 0x1143, |
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ATP867X_PREREAD_VAL = 0x0200, |
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ATP867X_NUM_PORTS = 4, |
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ATP867X_BAR_IOBASE = 0, |
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ATP867X_BAR_ROMBASE = 6, |
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}; |
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#define ATP867X_IOBASE(ap) ((ap)->host->iomap[0]) |
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#define ATP867X_SYS_INFO(ap) (0x3F + ATP867X_IOBASE(ap)) |
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#define ATP867X_IO_PORTBASE(ap, port) (0x00 + ATP867X_IOBASE(ap) + \ |
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(port) * ATP867X_IO_CHANNEL_OFFSET) |
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#define ATP867X_IO_DMABASE(ap, port) (0x40 + \ |
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ATP867X_IO_PORTBASE((ap), (port))) |
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#define ATP867X_IO_STATUS(ap, port) (0x07 + \ |
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ATP867X_IO_PORTBASE((ap), (port))) |
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#define ATP867X_IO_ALTSTATUS(ap, port) (0x0E + \ |
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ATP867X_IO_PORTBASE((ap), (port))) |
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/* |
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* hot priv ports |
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*/ |
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#define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \ |
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ATP867X_IO_DMABASE((ap), (port))) |
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#define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \ |
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ATP867X_IO_DMABASE((ap), (port))) |
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#define ATP867X_IO_8BPIOSPD(ap, port) (0x0A + \ |
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ATP867X_IO_DMABASE((ap), (port))) |
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#define ATP867X_IO_DMAMODE(ap, port) (0x0B + \ |
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ATP867X_IO_DMABASE((ap), (port))) |
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#define ATP867X_IO_PORTSPD(ap, port) (0x4A + \ |
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ATP867X_IO_PORTBASE((ap), (port))) |
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#define ATP867X_IO_PREREAD(ap, port) (0x4C + \ |
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ATP867X_IO_PORTBASE((ap), (port))) |
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struct atp867x_priv { |
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void __iomem *dma_mode; |
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void __iomem *mstr_piospd; |
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void __iomem *slave_piospd; |
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void __iomem *eightb_piospd; |
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int pci66mhz; |
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}; |
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static void atp867x_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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struct atp867x_priv *dp = ap->private_data; |
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u8 speed = adev->dma_mode; |
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u8 b; |
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u8 mode = speed - XFER_UDMA_0 + 1; |
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/* |
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* Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed |
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* on 66MHz bus |
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* rev-A: UDMA_1~4 (5, 6 no change) |
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* rev-B: all UDMA modes |
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* UDMA_0 stays not to disable UDMA |
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*/ |
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if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0 && |
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(pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B || |
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mode < ATP867X_IO_DMAMODE_UDMA_5)) |
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mode--; |
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b = ioread8(dp->dma_mode); |
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if (adev->devno & 1) { |
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b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) | |
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(mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT); |
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} else { |
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b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) | |
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(mode << ATP867X_IO_DMAMODE_MSTR_SHIFT); |
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} |
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iowrite8(b, dp->dma_mode); |
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} |
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static int atp867x_get_active_clocks_shifted(struct ata_port *ap, |
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unsigned int clk) |
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{ |
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struct atp867x_priv *dp = ap->private_data; |
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unsigned char clocks = clk; |
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/* |
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* Doc 6.6.9: increase the clock value by 1 for safer PIO speed |
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* on 66MHz bus |
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*/ |
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if (dp->pci66mhz) |
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clocks++; |
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switch (clocks) { |
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case 0: |
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clocks = 1; |
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break; |
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case 1 ... 6: |
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break; |
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default: |
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printk(KERN_WARNING "ATP867X: active %dclk is invalid. " |
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"Using 12clk.\n", clk); |
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fallthrough; |
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case 9 ... 12: |
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clocks = 7; /* 12 clk */ |
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break; |
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case 7: |
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case 8: /* default 8 clk */ |
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clocks = 0; |
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goto active_clock_shift_done; |
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} |
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active_clock_shift_done: |
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return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT; |
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} |
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static int atp867x_get_recover_clocks_shifted(unsigned int clk) |
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{ |
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unsigned char clocks = clk; |
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switch (clocks) { |
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case 0: |
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clocks = 1; |
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break; |
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case 1 ... 11: |
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break; |
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case 13: |
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case 14: |
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--clocks; /* by the spec */ |
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break; |
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case 15: |
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break; |
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default: |
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printk(KERN_WARNING "ATP867X: recover %dclk is invalid. " |
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"Using default 12clk.\n", clk); |
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fallthrough; |
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case 12: /* default 12 clk */ |
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clocks = 0; |
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break; |
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} |
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return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT; |
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} |
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static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev) |
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{ |
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struct ata_device *peer = ata_dev_pair(adev); |
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struct atp867x_priv *dp = ap->private_data; |
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u8 speed = adev->pio_mode; |
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struct ata_timing t, p; |
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int T, UT; |
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u8 b; |
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T = 1000000000 / 33333; |
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UT = T / 4; |
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ata_timing_compute(adev, speed, &t, T, UT); |
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if (peer && peer->pio_mode) { |
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ata_timing_compute(peer, peer->pio_mode, &p, T, UT); |
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ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT); |
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} |
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b = ioread8(dp->dma_mode); |
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if (adev->devno & 1) |
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b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK); |
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else |
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b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK); |
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iowrite8(b, dp->dma_mode); |
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b = atp867x_get_active_clocks_shifted(ap, t.active) | |
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atp867x_get_recover_clocks_shifted(t.recover); |
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if (adev->devno & 1) |
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iowrite8(b, dp->slave_piospd); |
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else |
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iowrite8(b, dp->mstr_piospd); |
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b = atp867x_get_active_clocks_shifted(ap, t.act8b) | |
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atp867x_get_recover_clocks_shifted(t.rec8b); |
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iowrite8(b, dp->eightb_piospd); |
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} |
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static int atp867x_cable_override(struct pci_dev *pdev) |
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{ |
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if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP && |
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(pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A || |
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pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) { |
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return 1; |
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} |
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return 0; |
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} |
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static int atp867x_cable_detect(struct ata_port *ap) |
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{ |
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struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
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if (atp867x_cable_override(pdev)) |
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return ATA_CBL_PATA40_SHORT; |
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return ATA_CBL_PATA_UNK; |
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} |
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static struct scsi_host_template atp867x_sht = { |
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ATA_BMDMA_SHT(DRV_NAME), |
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}; |
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static struct ata_port_operations atp867x_ops = { |
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.inherits = &ata_bmdma_port_ops, |
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.cable_detect = atp867x_cable_detect, |
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.set_piomode = atp867x_set_piomode, |
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.set_dmamode = atp867x_set_dmamode, |
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}; |
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#ifdef ATP867X_DEBUG |
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static void atp867x_check_res(struct pci_dev *pdev) |
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{ |
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int i; |
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unsigned long start, len; |
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/* Check the PCI resources for this channel are enabled */ |
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
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start = pci_resource_start(pdev, i); |
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len = pci_resource_len(pdev, i); |
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printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n", |
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start, len); |
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} |
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} |
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static void atp867x_check_ports(struct ata_port *ap, int port) |
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{ |
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struct ata_ioports *ioaddr = &ap->ioaddr; |
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struct atp867x_priv *dp = ap->private_data; |
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printk(KERN_DEBUG "ATP867X: port[%d] addresses\n" |
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" cmd_addr =0x%llx, 0x%llx\n" |
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" ctl_addr =0x%llx, 0x%llx\n" |
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" bmdma_addr =0x%llx, 0x%llx\n" |
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" data_addr =0x%llx\n" |
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" error_addr =0x%llx\n" |
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" feature_addr =0x%llx\n" |
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" nsect_addr =0x%llx\n" |
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" lbal_addr =0x%llx\n" |
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" lbam_addr =0x%llx\n" |
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" lbah_addr =0x%llx\n" |
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" device_addr =0x%llx\n" |
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" status_addr =0x%llx\n" |
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" command_addr =0x%llx\n" |
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" dp->dma_mode =0x%llx\n" |
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" dp->mstr_piospd =0x%llx\n" |
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" dp->slave_piospd =0x%llx\n" |
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" dp->eightb_piospd =0x%llx\n" |
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" dp->pci66mhz =0x%lx\n", |
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port, |
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(unsigned long long)ioaddr->cmd_addr, |
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(unsigned long long)ATP867X_IO_PORTBASE(ap, port), |
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(unsigned long long)ioaddr->ctl_addr, |
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(unsigned long long)ATP867X_IO_ALTSTATUS(ap, port), |
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(unsigned long long)ioaddr->bmdma_addr, |
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(unsigned long long)ATP867X_IO_DMABASE(ap, port), |
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(unsigned long long)ioaddr->data_addr, |
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(unsigned long long)ioaddr->error_addr, |
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(unsigned long long)ioaddr->feature_addr, |
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(unsigned long long)ioaddr->nsect_addr, |
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(unsigned long long)ioaddr->lbal_addr, |
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(unsigned long long)ioaddr->lbam_addr, |
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(unsigned long long)ioaddr->lbah_addr, |
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(unsigned long long)ioaddr->device_addr, |
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(unsigned long long)ioaddr->status_addr, |
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(unsigned long long)ioaddr->command_addr, |
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(unsigned long long)dp->dma_mode, |
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(unsigned long long)dp->mstr_piospd, |
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(unsigned long long)dp->slave_piospd, |
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(unsigned long long)dp->eightb_piospd, |
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(unsigned long)dp->pci66mhz); |
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} |
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#endif |
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static int atp867x_set_priv(struct ata_port *ap) |
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{ |
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struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
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struct atp867x_priv *dp; |
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int port = ap->port_no; |
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dp = ap->private_data = |
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devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL); |
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if (dp == NULL) |
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return -ENOMEM; |
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dp->dma_mode = ATP867X_IO_DMAMODE(ap, port); |
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dp->mstr_piospd = ATP867X_IO_MSTRPIOSPD(ap, port); |
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dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port); |
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dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port); |
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dp->pci66mhz = |
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ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ; |
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return 0; |
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} |
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static void atp867x_fixup(struct ata_host *host) |
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{ |
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struct pci_dev *pdev = to_pci_dev(host->dev); |
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struct ata_port *ap = host->ports[0]; |
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int i; |
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u8 v; |
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/* |
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* Broken BIOS might not set latency high enough |
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*/ |
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pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v); |
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if (v < 0x80) { |
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v = 0x80; |
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v); |
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printk(KERN_DEBUG "ATP867X: set latency timer of device %s" |
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" to %d\n", pci_name(pdev), v); |
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} |
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/* |
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* init 8bit io ports speed(0aaarrrr) to 43h and |
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* init udma modes of master/slave to 0/0(11h) |
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*/ |
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for (i = 0; i < ATP867X_NUM_PORTS; i++) |
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iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i)); |
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/* |
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* init PreREAD counts |
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*/ |
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for (i = 0; i < ATP867X_NUM_PORTS; i++) |
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iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i)); |
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v = ioread8(ATP867X_IOBASE(ap) + 0x28); |
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v &= 0xcf; /* Enable INTA#: bit4=0 means enable */ |
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v |= 0xc0; /* Enable PCI burst, MRM & not immediate interrupts */ |
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iowrite8(v, ATP867X_IOBASE(ap) + 0x28); |
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|
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/* |
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* Turn off the over clocked udma5 mode, only for Rev-B |
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*/ |
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v = ioread8(ATP867X_SYS_INFO(ap)); |
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v &= ATP867X_IO_SYS_MASK_RESERVED; |
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if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B) |
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v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5; |
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iowrite8(v, ATP867X_SYS_INFO(ap)); |
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} |
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static int atp867x_ata_pci_sff_init_host(struct ata_host *host) |
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{ |
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struct device *gdev = host->dev; |
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struct pci_dev *pdev = to_pci_dev(gdev); |
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unsigned int mask = 0; |
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int i, rc; |
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|
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/* |
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* do not map rombase |
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*/ |
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rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME); |
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if (rc == -EBUSY) |
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pcim_pin_device(pdev); |
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if (rc) |
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return rc; |
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host->iomap = pcim_iomap_table(pdev); |
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#ifdef ATP867X_DEBUG |
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atp867x_check_res(pdev); |
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for (i = 0; i < PCI_STD_NUM_BARS; i++) |
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printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i, |
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(unsigned long long)(host->iomap[i])); |
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#endif |
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/* |
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* request, iomap BARs and init port addresses accordingly |
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*/ |
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for (i = 0; i < host->n_ports; i++) { |
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struct ata_port *ap = host->ports[i]; |
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struct ata_ioports *ioaddr = &ap->ioaddr; |
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ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i); |
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ioaddr->ctl_addr = ioaddr->altstatus_addr |
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= ATP867X_IO_ALTSTATUS(ap, i); |
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ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i); |
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ata_sff_std_ports(ioaddr); |
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rc = atp867x_set_priv(ap); |
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if (rc) |
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return rc; |
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#ifdef ATP867X_DEBUG |
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atp867x_check_ports(ap, i); |
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#endif |
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ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", |
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(unsigned long)ioaddr->cmd_addr, |
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(unsigned long)ioaddr->ctl_addr); |
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ata_port_desc(ap, "bmdma 0x%lx", |
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(unsigned long)ioaddr->bmdma_addr); |
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mask |= 1 << i; |
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} |
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if (!mask) { |
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dev_err(gdev, "no available native port\n"); |
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return -ENODEV; |
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} |
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atp867x_fixup(host); |
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return dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK); |
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} |
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static int atp867x_init_one(struct pci_dev *pdev, |
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const struct pci_device_id *id) |
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{ |
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static const struct ata_port_info info_867x = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, |
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.udma_mask = ATA_UDMA6, |
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.port_ops = &atp867x_ops, |
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}; |
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struct ata_host *host; |
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const struct ata_port_info *ppi[] = { &info_867x, NULL }; |
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int rc; |
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ata_print_version_once(&pdev->dev, DRV_VERSION); |
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rc = pcim_enable_device(pdev); |
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if (rc) |
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return rc; |
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printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)", |
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pdev->device); |
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host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS); |
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if (!host) { |
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dev_err(&pdev->dev, "failed to allocate ATA host\n"); |
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rc = -ENOMEM; |
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goto err_out; |
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} |
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rc = atp867x_ata_pci_sff_init_host(host); |
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if (rc) { |
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dev_err(&pdev->dev, "failed to init host\n"); |
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goto err_out; |
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} |
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pci_set_master(pdev); |
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|
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rc = ata_host_activate(host, pdev->irq, ata_bmdma_interrupt, |
|
IRQF_SHARED, &atp867x_sht); |
|
if (rc) |
|
dev_err(&pdev->dev, "failed to activate host\n"); |
|
|
|
err_out: |
|
return rc; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int atp867x_reinit_one(struct pci_dev *pdev) |
|
{ |
|
struct ata_host *host = pci_get_drvdata(pdev); |
|
int rc; |
|
|
|
rc = ata_pci_device_do_resume(pdev); |
|
if (rc) |
|
return rc; |
|
|
|
atp867x_fixup(host); |
|
|
|
ata_host_resume(host); |
|
return 0; |
|
} |
|
#endif |
|
|
|
static struct pci_device_id atp867x_pci_tbl[] = { |
|
{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A), 0 }, |
|
{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B), 0 }, |
|
{ }, |
|
}; |
|
|
|
static struct pci_driver atp867x_driver = { |
|
.name = DRV_NAME, |
|
.id_table = atp867x_pci_tbl, |
|
.probe = atp867x_init_one, |
|
.remove = ata_pci_remove_one, |
|
#ifdef CONFIG_PM_SLEEP |
|
.suspend = ata_pci_device_suspend, |
|
.resume = atp867x_reinit_one, |
|
#endif |
|
}; |
|
|
|
module_pci_driver(atp867x_driver); |
|
|
|
MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc."); |
|
MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl); |
|
MODULE_VERSION(DRV_VERSION);
|
|
|