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Subject[PATCH 29/68] ata_piix: move code to be re-used by ide2libata to ata_piix.h
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ata_piix: move code to be re-used by ide2libata to ata_piix.h

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ata/ata_piix.c | 220 -----------------------------------------------
drivers/ata/ata_piix.h | 226 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 226 insertions(+), 220 deletions(-)

Index: b/drivers/ata/ata_piix.c
===================================================================
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -629,178 +629,6 @@ static int piix_pata_prereset(struct ata
return ata_sff_prereset(link, deadline);
}

-static DEFINE_SPINLOCK(piix_lock);
-
-static void piix_set_timings(struct ata_port *ap, struct ata_device *adev,
- u8 pio, bool use_mwdma)
-{
- struct pci_dev *dev = to_pci_dev(ap->host->dev);
- unsigned long flags;
- unsigned int is_slave = (adev->devno != 0);
- unsigned int master_port= ap->port_no ? 0x42 : 0x40;
- unsigned int slave_port = 0x44;
- u16 master_data;
- u8 slave_data;
- u8 udma_enable;
- int control = 0;
-
- /*
- * See Intel Document 298600-004 for the timing programing rules
- * for ICH controllers.
- */
-
- static const /* ISP RTC */
- u8 timings[][2] = { { 0, 0 },
- { 0, 0 },
- { 1, 0 },
- { 2, 1 },
- { 2, 3 }, };
-
- if (pio >= 2 || use_mwdma)
- control |= 1; /* TIME1 enable */
- if (ata_pio_need_iordy(adev) || use_mwdma)
- control |= 2; /* IE enable */
- /* Intel specifies that the PPE functionality is for disk only */
- if (adev->class == ATA_DEV_ATA)
- control |= 4; /* PPE enable */
- /* If the drive MWDMA is faster than it can do PIO then
- we must force PIO into PIO0 */
- if (use_mwdma && adev->pio_mode < (XFER_PIO_0 + pio))
- /* Enable DMA timing only */
- control |= 8; /* PIO cycles in PIO0 */
-
- spin_lock_irqsave(&piix_lock, flags);
-
- /* PIO configuration clears DTE unconditionally. It will be
- * programmed in set_dmamode which is guaranteed to be called
- * after set_piomode if any DMA mode is available.
- */
- pci_read_config_word(dev, master_port, &master_data);
- if (is_slave) {
- /* clear TIME1|IE1|PPE1|DTE1 */
- master_data &= 0xff0f;
- /* Enable SITRE (separate slave timing register) */
- master_data |= 0x4000;
- /* enable PPE1, IE1 and TIME1 as needed */
- master_data |= (control << 4);
- pci_read_config_byte(dev, slave_port, &slave_data);
- slave_data &= (ap->port_no ? 0x0f : 0xf0);
- /* Load the timing nibble for this slave */
- slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
- << (ap->port_no ? 4 : 0);
- } else {
- /* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
- master_data &= 0xccf0;
- /* Enable PPE, IE and TIME as appropriate */
- master_data |= control;
- /* load ISP and RCT */
- master_data |=
- (timings[pio][0] << 12) |
- (timings[pio][1] << 8);
- }
- pci_write_config_word(dev, master_port, master_data);
- if (is_slave)
- pci_write_config_byte(dev, slave_port, slave_data);
-
- /* Ensure the UDMA bit is off - it will be turned back on if
- UDMA is selected */
-
- if (ap->udma_mask) {
- pci_read_config_byte(dev, 0x48, &udma_enable);
- udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
- pci_write_config_byte(dev, 0x48, udma_enable);
- }
-
- spin_unlock_irqrestore(&piix_lock, flags);
-}
-
-/**
- * piix_set_piomode - Initialize host controller PATA PIO timings
- * @ap: Port whose timings we are configuring
- * @adev: Drive in question
- *
- * Set PIO mode for device, in host controller PCI config space.
- *
- * LOCKING:
- * None (inherited from caller).
- */
-
-static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
-{
- piix_set_timings(ap, adev, adev->pio_mode - XFER_PIO_0, 0);
-}
-
-/**
- * do_pata_set_dmamode - Initialize host controller PATA PIO timings
- * @ap: Port whose timings we are configuring
- * @adev: Drive in question
- * @isich: set if the chip is an ICH device
- *
- * Set UDMA mode for device, in host controller PCI config space.
- *
- * LOCKING:
- * None (inherited from caller).
- */
-
-static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
-{
- struct pci_dev *dev = to_pci_dev(ap->host->dev);
- unsigned long flags;
- u8 speed = adev->dma_mode;
- int devid = adev->devno + 2 * ap->port_no;
- u8 udma_enable = 0;
-
- if (speed >= XFER_UDMA_0) {
- unsigned int udma = speed - XFER_UDMA_0;
- u16 udma_timing;
- u16 ideconf;
- int u_clock, u_speed;
-
- spin_lock_irqsave(&piix_lock, flags);
-
- pci_read_config_byte(dev, 0x48, &udma_enable);
-
- /*
- * UDMA is handled by a combination of clock switching and
- * selection of dividers
- *
- * Handy rule: Odd modes are UDMATIMx 01, even are 02
- * except UDMA0 which is 00
- */
- u_speed = min(2 - (udma & 1), udma);
- if (udma == 5)
- u_clock = 0x1000; /* 100Mhz */
- else if (udma > 2)
- u_clock = 1; /* 66Mhz */
- else
- u_clock = 0; /* 33Mhz */
-
- udma_enable |= (1 << devid);
-
- /* Load the CT/RP selection */
- pci_read_config_word(dev, 0x4A, &udma_timing);
- udma_timing &= ~(3 << (4 * devid));
- udma_timing |= u_speed << (4 * devid);
- pci_write_config_word(dev, 0x4A, udma_timing);
-
- if (isich) {
- /* Select a 33/66/100Mhz clock */
- pci_read_config_word(dev, 0x54, &ideconf);
- ideconf &= ~(0x1001 << devid);
- ideconf |= u_clock << devid;
- /* For ICH or later we should set bit 10 for better
- performance (WR_PingPong_En) */
- pci_write_config_word(dev, 0x54, ideconf);
- }
-
- pci_write_config_byte(dev, 0x48, udma_enable);
-
- spin_unlock_irqrestore(&piix_lock, flags);
- } else
- /* MWDMA is driven by the PIO timings. */
- piix_set_timings(ap, adev, ata_mwdma_to_pio(speed), 1);
-}
-
/**
* piix_set_dmamode - Initialize host controller PATA DMA timings
* @ap: Port whose timings we are configuring
@@ -817,22 +645,6 @@ static void piix_set_dmamode(struct ata_
do_pata_set_dmamode(ap, adev, 0);
}

-/**
- * ich_set_dmamode - Initialize host controller PATA DMA timings
- * @ap: Port whose timings we are configuring
- * @adev: um
- *
- * Set MW/UDMA mode for device, in host controller PCI config space.
- *
- * LOCKING:
- * None (inherited from caller).
- */
-
-static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
-{
- do_pata_set_dmamode(ap, adev, 1);
-}
-
/*
* Serial ATA Index/Data Pair Superset Registers access
*
@@ -1145,38 +957,6 @@ static int piix_disable_ahci(struct pci_
return rc;
}

-/**
- * piix_check_450nx_errata - Check for problem 450NX setup
- * @ata_dev: the PCI device to check
- *
- * Check for the present of 450NX errata #19 and errata #25. If
- * they are found return an error code so we can turn off DMA
- */
-
-static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
-{
- struct pci_dev *pdev = NULL;
- u16 cfg;
- int no_piix_dma = 0;
-
- while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
- /* Look for 450NX PXB. Check for problem configurations
- A PCI quirk checks bit 6 already */
- pci_read_config_word(pdev, 0x41, &cfg);
- /* Only on the original revision: IDE DMA can hang */
- if (pdev->revision == 0x00)
- no_piix_dma = 1;
- /* On all revisions below 5 PXB bus lock must be disabled for IDE */
- else if (cfg & (1<<14) && pdev->revision < 5)
- no_piix_dma = 2;
- }
- if (no_piix_dma)
- dev_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n");
- if (no_piix_dma == 2)
- dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n");
- return no_piix_dma;
-}
-
static void __devinit piix_init_pcs(struct ata_host *host,
const struct piix_map_db *map_db)
{
Index: b/drivers/ata/ata_piix.h
===================================================================
--- a/drivers/ata/ata_piix.h
+++ b/drivers/ata/ata_piix.h
@@ -43,3 +43,229 @@ static int ich_short_ata40(struct pci_de

return 0;
}
+
+#ifdef __LINUX_LIBATA_H__
+static DEFINE_SPINLOCK(piix_lock);
+
+static void piix_set_timings(struct ata_port *ap, struct ata_device *adev,
+ u8 pio, bool use_mwdma)
+{
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+ unsigned long flags;
+ unsigned int is_slave = (adev->devno != 0);
+ unsigned int master_port = ap->port_no ? 0x42 : 0x40;
+ unsigned int slave_port = 0x44;
+ u16 master_data;
+ u8 slave_data;
+ u8 udma_enable;
+ int control = 0;
+
+ /*
+ * See Intel Document 298600-004 for the timing programing rules
+ * for ICH controllers.
+ */
+
+ static const /* ISP RTC */
+ u8 timings[][2] = { { 0, 0 },
+ { 0, 0 },
+ { 1, 0 },
+ { 2, 1 },
+ { 2, 3 }, };
+
+ if (pio >= 2 || use_mwdma)
+ control |= 1; /* TIME1 enable */
+ if (ata_pio_need_iordy(adev) || use_mwdma)
+ control |= 2; /* IE enable */
+ /* Intel specifies that the PPE functionality is for disk only */
+ if (adev->class == ATA_DEV_ATA)
+ control |= 4; /* PPE enable */
+ /* If the drive MWDMA is faster than it can do PIO then
+ we must force PIO into PIO0 */
+ if (use_mwdma && adev->pio_mode < (XFER_PIO_0 + pio))
+ /* Enable DMA timing only */
+ control |= 8; /* PIO cycles in PIO0 */
+
+ spin_lock_irqsave(&piix_lock, flags);
+
+ /* PIO configuration clears DTE unconditionally. It will be
+ * programmed in set_dmamode which is guaranteed to be called
+ * after set_piomode if any DMA mode is available.
+ */
+ pci_read_config_word(dev, master_port, &master_data);
+ if (is_slave) {
+ /* clear TIME1|IE1|PPE1|DTE1 */
+ master_data &= 0xff0f;
+ /* Enable SITRE (separate slave timing register) */
+ master_data |= 0x4000;
+ /* enable PPE1, IE1 and TIME1 as needed */
+ master_data |= (control << 4);
+ pci_read_config_byte(dev, slave_port, &slave_data);
+ slave_data &= (ap->port_no ? 0x0f : 0xf0);
+ /* Load the timing nibble for this slave */
+ slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
+ << (ap->port_no ? 4 : 0);
+ } else {
+ /* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
+ master_data &= 0xccf0;
+ /* Enable PPE, IE and TIME as appropriate */
+ master_data |= control;
+ /* load ISP and RCT */
+ master_data |=
+ (timings[pio][0] << 12) |
+ (timings[pio][1] << 8);
+ }
+ pci_write_config_word(dev, master_port, master_data);
+ if (is_slave)
+ pci_write_config_byte(dev, slave_port, slave_data);
+
+ /* Ensure the UDMA bit is off - it will be turned back on if
+ UDMA is selected */
+
+ if (ap->udma_mask) {
+ pci_read_config_byte(dev, 0x48, &udma_enable);
+ udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
+ pci_write_config_byte(dev, 0x48, udma_enable);
+ }
+
+ spin_unlock_irqrestore(&piix_lock, flags);
+}
+
+/**
+ * piix_set_piomode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: Drive in question
+ *
+ * Set PIO mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ piix_set_timings(ap, adev, adev->pio_mode - XFER_PIO_0, 0);
+}
+
+/**
+ * do_pata_set_dmamode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: Drive in question
+ * @isich: set if the chip is an ICH device
+ *
+ * Set UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev,
+ int isich)
+{
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+ unsigned long flags;
+ u8 speed = adev->dma_mode;
+ int devid = adev->devno + 2 * ap->port_no;
+ u8 udma_enable = 0;
+
+ if (speed >= XFER_UDMA_0) {
+ unsigned int udma = speed - XFER_UDMA_0;
+ u16 udma_timing;
+ u16 ideconf;
+ int u_clock, u_speed;
+
+ spin_lock_irqsave(&piix_lock, flags);
+
+ pci_read_config_byte(dev, 0x48, &udma_enable);
+
+ /*
+ * UDMA is handled by a combination of clock switching and
+ * selection of dividers
+ *
+ * Handy rule: Odd modes are UDMATIMx 01, even are 02
+ * except UDMA0 which is 00
+ */
+ u_speed = min(2 - (udma & 1), udma);
+ if (udma == 5)
+ u_clock = 0x1000; /* 100Mhz */
+ else if (udma > 2)
+ u_clock = 1; /* 66Mhz */
+ else
+ u_clock = 0; /* 33Mhz */
+
+ udma_enable |= (1 << devid);
+
+ /* Load the CT/RP selection */
+ pci_read_config_word(dev, 0x4A, &udma_timing);
+ udma_timing &= ~(3 << (4 * devid));
+ udma_timing |= u_speed << (4 * devid);
+ pci_write_config_word(dev, 0x4A, udma_timing);
+
+ if (isich) {
+ /* Select a 33/66/100Mhz clock */
+ pci_read_config_word(dev, 0x54, &ideconf);
+ ideconf &= ~(0x1001 << devid);
+ ideconf |= u_clock << devid;
+ /* For ICH or later we should set bit 10 for better
+ performance (WR_PingPong_En) */
+ pci_write_config_word(dev, 0x54, ideconf);
+ }
+
+ pci_write_config_byte(dev, 0x48, udma_enable);
+
+ spin_unlock_irqrestore(&piix_lock, flags);
+ } else
+ /* MWDMA is driven by the PIO timings. */
+ piix_set_timings(ap, adev, ata_mwdma_to_pio(speed), 1);
+}
+
+/**
+ * ich_set_dmamode - Initialize host controller PATA DMA timings
+ * @ap: Port whose timings we are configuring
+ * @adev: um
+ *
+ * Set MW/UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ do_pata_set_dmamode(ap, adev, 1);
+}
+
+/**
+ * piix_check_450nx_errata - Check for problem 450NX setup
+ * @ata_dev: the PCI device to check
+ *
+ * Check for the present of 450NX errata #19 and errata #25. If
+ * they are found return an error code so we can turn off DMA
+ */
+
+static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
+{
+ struct pci_dev *pdev = NULL;
+ u16 cfg;
+ int no_piix_dma = 0;
+
+ while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
+ /* Look for 450NX PXB. Check for problem configurations
+ A PCI quirk checks bit 6 already */
+ pci_read_config_word(pdev, 0x41, &cfg);
+ /* Only on the original revision: IDE DMA can hang */
+ if (pdev->revision == 0x00)
+ no_piix_dma = 1;
+ /* On all revs below 5 PXB bus lock must be disabled for IDE */
+ else if (cfg & (1<<14) && pdev->revision < 5)
+ no_piix_dma = 2;
+ }
+ if (no_piix_dma)
+ dev_printk(KERN_WARNING, &ata_dev->dev,
+ "450NX errata present, disabling IDE DMA.\n");
+ if (no_piix_dma == 2)
+ dev_printk(KERN_WARNING, &ata_dev->dev,
+ "A BIOS update may resolve this.\n");
+ return no_piix_dma;
+}
+#endif

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