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1626aeb881
The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
234 lines
5.8 KiB
C
234 lines
5.8 KiB
C
/*
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* pata_hpt3x3 - HPT3x3 driver
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* (c) Copyright 2005-2006 Red Hat
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*
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* Was pata_hpt34x but the naming was confusing as it supported the
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* 343 and 363 so it has been renamed.
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*
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* Based on:
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* linux/drivers/ide/pci/hpt34x.c Version 0.40 Sept 10, 2002
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* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
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*
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* May be copied or modified under the terms of the GNU General Public
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* License
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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_hpt3x3"
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#define DRV_VERSION "0.4.2"
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/**
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* hpt3x3_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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* Set our PIO requirements. This is fairly simple on the HPT3x3 as
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* all we have to do is clear the MWDMA and UDMA bits then load the
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* mode number.
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*/
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static void hpt3x3_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 r1, r2;
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int dn = 2 * ap->port_no + adev->devno;
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pci_read_config_dword(pdev, 0x44, &r1);
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pci_read_config_dword(pdev, 0x48, &r2);
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/* Load the PIO timing number */
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r1 &= ~(7 << (3 * dn));
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r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
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r2 &= ~(0x11 << dn); /* Clear MWDMA and UDMA bits */
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pci_write_config_dword(pdev, 0x44, r1);
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pci_write_config_dword(pdev, 0x48, r2);
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}
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/**
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* hpt3x3_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 hpt3x3_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 r1, r2;
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int dn = 2 * ap->port_no + adev->devno;
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int mode_num = adev->dma_mode & 0x0F;
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pci_read_config_dword(pdev, 0x44, &r1);
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pci_read_config_dword(pdev, 0x48, &r2);
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/* Load the timing number */
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r1 &= ~(7 << (3 * dn));
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r1 |= (mode_num << (3 * dn));
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r2 &= ~(0x11 << dn); /* Clear MWDMA and UDMA bits */
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if (adev->dma_mode >= XFER_UDMA_0)
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r2 |= 0x01 << dn; /* Ultra mode */
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else
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r2 |= 0x10 << dn; /* MWDMA */
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pci_write_config_dword(pdev, 0x44, r1);
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pci_write_config_dword(pdev, 0x48, r2);
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}
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static struct scsi_host_template hpt3x3_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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.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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.slave_destroy = ata_scsi_slave_destroy,
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.bios_param = ata_std_bios_param,
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};
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static struct ata_port_operations hpt3x3_port_ops = {
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.port_disable = ata_port_disable,
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.set_piomode = hpt3x3_set_piomode,
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.set_dmamode = hpt3x3_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 = ata_bmdma_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.cable_detect = ata_cable_40wire,
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = ata_bmdma_start,
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.bmdma_stop = ata_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 = ata_qc_issue_prot,
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.data_xfer = ata_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.irq_on = ata_irq_on,
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.irq_ack = ata_irq_ack,
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.port_start = ata_port_start,
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};
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/**
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* hpt3x3_init_chipset - chip setup
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* @dev: PCI device
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*
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* Perform the setup required at boot and on resume.
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*/
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static void hpt3x3_init_chipset(struct pci_dev *dev)
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{
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u16 cmd;
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/* Initialize the board */
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pci_write_config_word(dev, 0x80, 0x00);
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/* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
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pci_read_config_word(dev, PCI_COMMAND, &cmd);
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if (cmd & PCI_COMMAND_MEMORY)
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
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else
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
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}
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/**
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* hpt3x3_init_one - Initialise an HPT343/363
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* @dev: PCI device
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* @id: Entry in match table
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*
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* Perform basic initialisation. The chip has a quirk that it won't
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* function unless it is at XX00. The old ATA driver touched this up
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* but we leave it for pci quirks to do properly.
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*/
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static int hpt3x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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static const struct ata_port_info info = {
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.sht = &hpt3x3_sht,
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.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = 0x07,
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.port_ops = &hpt3x3_port_ops
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};
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const struct ata_port_info *ppi[] = { &info, NULL };
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hpt3x3_init_chipset(dev);
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/* Now kick off ATA set up */
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return ata_pci_init_one(dev, ppi);
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}
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#ifdef CONFIG_PM
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static int hpt3x3_reinit_one(struct pci_dev *dev)
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{
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hpt3x3_init_chipset(dev);
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return ata_pci_device_resume(dev);
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}
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#endif
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static const struct pci_device_id hpt3x3[] = {
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{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT343), },
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{ },
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};
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static struct pci_driver hpt3x3_pci_driver = {
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.name = DRV_NAME,
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.id_table = hpt3x3,
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.probe = hpt3x3_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM
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.suspend = ata_pci_device_suspend,
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.resume = hpt3x3_reinit_one,
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#endif
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};
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static int __init hpt3x3_init(void)
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{
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return pci_register_driver(&hpt3x3_pci_driver);
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}
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static void __exit hpt3x3_exit(void)
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{
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pci_unregister_driver(&hpt3x3_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, hpt3x3);
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MODULE_VERSION(DRV_VERSION);
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module_init(hpt3x3_init);
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module_exit(hpt3x3_exit);
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