88b2b32bab
* Convert {ide_hwif_t,ide_pci_device_t}->host_flag to be u16.
* Add IDE_HFLAG_POST_SET_MODE host flag to indicate the need to program
the host for the transfer mode after programming the device. Set it
in au1xxx-ide, amd74xx, cs5530, cs5535, pdc202xx_new, sc1200, pmac
and via82cxxx host drivers.
* Add IDE_HFLAG_NO_SET_MODE host flag to indicate the need to completely
skip programming of host/device for the transfer mode ("smart" hosts).
Set it in it821x host driver and check it in ide_tune_dma().
* Add ide_set_pio_mode()/ide_set_dma_mode() helpers and convert all
direct ->set_pio_mode/->speedproc users to use these helpers.
* Move ide_config_drive_speed() calls from ->set_pio_mode/->speedproc
methods to callers.
* Rename ->speedproc method to ->set_dma_mode, make it void and update
all implementations accordingly.
* Update ide_set_xfer_rate() comments.
* Unexport ide_config_drive_speed().
v2:
* Fix issues noticed by Sergei:
- export ide_set_dma_mode() instead of moving ->set_pio_mode abuse wrt
to setting DMA modes from sc1200_set_pio_mode() to do_special()
- check IDE_HFLAG_NO_SET_MODE in ide_tune_dma()
- check for (hwif->set_pio_mode) == NULL in ide_set_pio_mode()
- check for (hwif->set_dma_mode) == NULL in ide_set_dma_mode()
- return -1 from ide_set_{pio,dma}_mode() if ->set_{pio,dma}_mode == NULL
- don't set ->set_{pio,dma}_mode on it821x in "smart" mode
- fix build problem in pmac.c
- minor fixes in au1xxx-ide.c/cs5530.c/siimage.c
- improve patch description
Changes in behavior caused by this patch:
- HDIO_SET_PIO_MODE ioctl would now return -ENOSYS for attempts to change
PIO mode if it821x controller is in "smart" mode
- removal of two debugging printk-s (from cs5530.c and sc1200.c)
- transfer modes 0x00-0x07 passed from user space may be programmed twice on
the device (not really an issue since 0x00 is not supported correctly by
any host driver ATM, 0x01 is not supported at all and 0x02-0x07 are invalid)
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
306 lines
7.2 KiB
C
306 lines
7.2 KiB
C
/*
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* ITE 8213 IDE driver
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*
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* Copyright (C) 2006 Jack Lee
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* Copyright (C) 2006 Alan Cox
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* Copyright (C) 2007 Bartlomiej Zolnierkiewicz
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.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/ide.h>
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#include <linux/init.h>
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#include <asm/io.h>
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/**
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* it8213_dma_2_pio - return the PIO mode matching DMA
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* @xfer_rate: transfer speed
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*
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* Returns the nearest equivalent PIO timing for the DMA
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* mode requested by the controller.
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*/
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static u8 it8213_dma_2_pio (u8 xfer_rate) {
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switch(xfer_rate) {
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case XFER_UDMA_6:
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case XFER_UDMA_5:
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case XFER_UDMA_4:
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case XFER_UDMA_3:
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case XFER_UDMA_2:
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case XFER_UDMA_1:
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case XFER_UDMA_0:
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case XFER_MW_DMA_2:
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return 4;
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case XFER_MW_DMA_1:
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return 3;
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case XFER_SW_DMA_2:
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return 2;
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case XFER_MW_DMA_0:
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case XFER_SW_DMA_1:
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case XFER_SW_DMA_0:
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default:
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return 0;
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}
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}
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/**
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* it8213_set_pio_mode - set host controller for PIO mode
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* @drive: drive
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* @pio: PIO mode number
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*
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* Set the interface PIO mode.
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*/
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static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
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{
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ide_hwif_t *hwif = HWIF(drive);
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struct pci_dev *dev = hwif->pci_dev;
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int is_slave = drive->dn & 1;
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int master_port = 0x40;
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int slave_port = 0x44;
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unsigned long flags;
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u16 master_data;
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u8 slave_data;
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static DEFINE_SPINLOCK(tune_lock);
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int control = 0;
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static const u8 timings[][2]= {
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{ 0, 0 },
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{ 0, 0 },
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{ 1, 0 },
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{ 2, 1 },
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{ 2, 3 }, };
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spin_lock_irqsave(&tune_lock, flags);
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pci_read_config_word(dev, master_port, &master_data);
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if (pio > 1)
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control |= 1; /* Programmable timing on */
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if (drive->media != ide_disk)
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control |= 4; /* ATAPI */
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if (pio > 2)
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control |= 2; /* IORDY */
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if (is_slave) {
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master_data |= 0x4000;
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master_data &= ~0x0070;
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if (pio > 1)
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master_data = master_data | (control << 4);
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pci_read_config_byte(dev, slave_port, &slave_data);
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slave_data = slave_data & 0xf0;
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slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
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} else {
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master_data &= ~0x3307;
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if (pio > 1)
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master_data = master_data | control;
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master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
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}
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pci_write_config_word(dev, master_port, master_data);
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if (is_slave)
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pci_write_config_byte(dev, slave_port, slave_data);
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spin_unlock_irqrestore(&tune_lock, flags);
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}
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/**
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* it8213_set_dma_mode - set host controller for DMA mode
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* @drive: drive
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* @speed: DMA mode
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*
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* Tune the ITE chipset for the DMA mode.
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*/
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static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
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{
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ide_hwif_t *hwif = HWIF(drive);
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struct pci_dev *dev = hwif->pci_dev;
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u8 maslave = 0x40;
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int a_speed = 3 << (drive->dn * 4);
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int u_flag = 1 << drive->dn;
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int v_flag = 0x01 << drive->dn;
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int w_flag = 0x10 << drive->dn;
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int u_speed = 0;
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u16 reg4042, reg4a;
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u8 reg48, reg54, reg55;
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pci_read_config_word(dev, maslave, ®4042);
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pci_read_config_byte(dev, 0x48, ®48);
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pci_read_config_word(dev, 0x4a, ®4a);
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pci_read_config_byte(dev, 0x54, ®54);
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pci_read_config_byte(dev, 0x55, ®55);
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switch(speed) {
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case XFER_UDMA_6:
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case XFER_UDMA_4:
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case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
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case XFER_UDMA_5:
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case XFER_UDMA_3:
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case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
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case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
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break;
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case XFER_MW_DMA_2:
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case XFER_MW_DMA_1:
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case XFER_SW_DMA_2:
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break;
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default:
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return;
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}
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if (speed >= XFER_UDMA_0) {
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if (!(reg48 & u_flag))
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pci_write_config_byte(dev, 0x48, reg48 | u_flag);
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if (speed >= XFER_UDMA_5) {
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pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
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} else {
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pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
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}
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if ((reg4a & a_speed) != u_speed)
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pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
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if (speed > XFER_UDMA_2) {
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if (!(reg54 & v_flag))
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pci_write_config_byte(dev, 0x54, reg54 | v_flag);
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} else
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pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
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} else {
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if (reg48 & u_flag)
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pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
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if (reg4a & a_speed)
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pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
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if (reg54 & v_flag)
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pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
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if (reg55 & w_flag)
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pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
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}
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it8213_set_pio_mode(drive, it8213_dma_2_pio(speed));
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}
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/**
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* it8213_configure_drive_for_dma - set up for DMA transfers
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* @drive: drive we are going to set up
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*
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* Set up the drive for DMA, tune the controller and drive as
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* required. If the drive isn't suitable for DMA or we hit
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* other problems then we will drop down to PIO and set up
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* PIO appropriately
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*/
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static int it8213_config_drive_for_dma (ide_drive_t *drive)
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{
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if (ide_tune_dma(drive))
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return 0;
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ide_set_max_pio(drive);
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return -1;
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}
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/**
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* init_hwif_it8213 - set up hwif structs
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* @hwif: interface to set up
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*
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* We do the basic set up of the interface structure. The IT8212
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* requires several custom handlers so we override the default
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* ide DMA handlers appropriately
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*/
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static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
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{
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u8 reg42h = 0;
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hwif->set_dma_mode = &it8213_set_dma_mode;
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hwif->set_pio_mode = &it8213_set_pio_mode;
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hwif->autodma = 0;
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hwif->drives[0].autotune = 1;
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hwif->drives[1].autotune = 1;
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if (!hwif->dma_base)
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return;
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hwif->atapi_dma = 1;
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hwif->ultra_mask = 0x7f;
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hwif->mwdma_mask = 0x06;
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hwif->swdma_mask = 0x04;
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pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
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hwif->ide_dma_check = &it8213_config_drive_for_dma;
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if (hwif->cbl != ATA_CBL_PATA40_SHORT)
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hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
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/*
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* The BIOS often doesn't set up DMA on this controller
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* so we always do it.
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*/
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if (!noautodma)
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hwif->autodma = 1;
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hwif->drives[0].autodma = hwif->autodma;
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hwif->drives[1].autodma = hwif->autodma;
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}
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#define DECLARE_ITE_DEV(name_str) \
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{ \
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.name = name_str, \
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.init_hwif = init_hwif_it8213, \
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.autodma = AUTODMA, \
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.enablebits = {{0x41,0x80,0x80}}, \
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.bootable = ON_BOARD, \
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.host_flags = IDE_HFLAG_SINGLE, \
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.pio_mask = ATA_PIO4, \
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}
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static ide_pci_device_t it8213_chipsets[] __devinitdata = {
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/* 0 */ DECLARE_ITE_DEV("IT8213"),
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};
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/**
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* it8213_init_one - pci layer discovery entry
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* @dev: PCI device
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* @id: ident table entry
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*
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* Called by the PCI code when it finds an ITE8213 controller. As
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* this device follows the standard interfaces we can use the
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* standard helper functions to do almost all the work for us.
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*/
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static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
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return 0;
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}
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static struct pci_device_id it8213_pci_tbl[] = {
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{ PCI_VENDOR_ID_ITE, 0x8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
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static struct pci_driver driver = {
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.name = "ITE8213_IDE",
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.id_table = it8213_pci_tbl,
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.probe = it8213_init_one,
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};
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static int __init it8213_ide_init(void)
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{
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return ide_pci_register_driver(&driver);
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}
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module_init(it8213_ide_init);
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MODULE_AUTHOR("Jack Lee, Alan Cox");
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MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
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MODULE_LICENSE("GPL");
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