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![Alan Cox](/assets/img/avatar_default.png)
Some iomap functions were still using readl/writel and friends which happens to work on most platforms but is not correct. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
860 lines
23 KiB
C
860 lines
23 KiB
C
/*
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* Promise PATA TX2/TX4/TX2000/133 IDE driver for pdc20268 to pdc20277.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Ported to libata by:
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* Albert Lee <albertcc@tw.ibm.com> IBM Corporation
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*
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* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
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* Portions Copyright (C) 1999 Promise Technology, Inc.
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*
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* Author: Frank Tiernan (frankt@promise.com)
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* Released under terms of General Public License
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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* Hardware information only available under NDA.
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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/init.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 <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_cmnd.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_pdc2027x"
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#define DRV_VERSION "1.0"
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#undef PDC_DEBUG
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#ifdef PDC_DEBUG
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#define PDPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
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#else
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#define PDPRINTK(fmt, args...)
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#endif
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enum {
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PDC_MMIO_BAR = 5,
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PDC_UDMA_100 = 0,
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PDC_UDMA_133 = 1,
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PDC_100_MHZ = 100000000,
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PDC_133_MHZ = 133333333,
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PDC_SYS_CTL = 0x1100,
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PDC_ATA_CTL = 0x1104,
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PDC_GLOBAL_CTL = 0x1108,
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PDC_CTCR0 = 0x110C,
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PDC_CTCR1 = 0x1110,
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PDC_BYTE_COUNT = 0x1120,
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PDC_PLL_CTL = 0x1202,
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};
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static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
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static void pdc2027x_error_handler(struct ata_port *ap);
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static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);
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static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
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static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);
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static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask);
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static int pdc2027x_cable_detect(struct ata_port *ap);
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static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed);
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/*
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* ATA Timing Tables based on 133MHz controller clock.
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* These tables are only used when the controller is in 133MHz clock.
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* If the controller is in 100MHz clock, the ASIC hardware will
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* set the timing registers automatically when "set feature" command
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* is issued to the device. However, if the controller clock is 133MHz,
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* the following tables must be used.
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*/
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static struct pdc2027x_pio_timing {
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u8 value0, value1, value2;
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} pdc2027x_pio_timing_tbl [] = {
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{ 0xfb, 0x2b, 0xac }, /* PIO mode 0 */
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{ 0x46, 0x29, 0xa4 }, /* PIO mode 1 */
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{ 0x23, 0x26, 0x64 }, /* PIO mode 2 */
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{ 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
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{ 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
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};
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static struct pdc2027x_mdma_timing {
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u8 value0, value1;
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} pdc2027x_mdma_timing_tbl [] = {
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{ 0xdf, 0x5f }, /* MDMA mode 0 */
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{ 0x6b, 0x27 }, /* MDMA mode 1 */
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{ 0x69, 0x25 }, /* MDMA mode 2 */
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};
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static struct pdc2027x_udma_timing {
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u8 value0, value1, value2;
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} pdc2027x_udma_timing_tbl [] = {
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{ 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
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{ 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
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{ 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
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{ 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
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{ 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
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{ 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
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{ 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
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};
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static const struct pci_device_id pdc2027x_pci_tbl[] = {
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), PDC_UDMA_100 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), PDC_UDMA_133 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), PDC_UDMA_100 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), PDC_UDMA_133 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), PDC_UDMA_133 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), PDC_UDMA_133 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), PDC_UDMA_133 },
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{ } /* terminate list */
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};
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static struct pci_driver pdc2027x_pci_driver = {
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.name = DRV_NAME,
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.id_table = pdc2027x_pci_tbl,
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.probe = pdc2027x_init_one,
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.remove = ata_pci_remove_one,
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};
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static struct scsi_host_template pdc2027x_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 pdc2027x_pata100_ops = {
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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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.check_atapi_dma = pdc2027x_check_atapi_dma,
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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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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = pdc2027x_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.cable_detect = pdc2027x_cable_detect,
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.irq_clear = ata_bmdma_irq_clear,
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.irq_on = ata_irq_on,
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.port_start = ata_sff_port_start,
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};
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static struct ata_port_operations pdc2027x_pata133_ops = {
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.set_piomode = pdc2027x_set_piomode,
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.set_dmamode = pdc2027x_set_dmamode,
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.set_mode = pdc2027x_set_mode,
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.mode_filter = pdc2027x_mode_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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.check_atapi_dma = pdc2027x_check_atapi_dma,
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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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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = pdc2027x_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.cable_detect = pdc2027x_cable_detect,
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.irq_clear = ata_bmdma_irq_clear,
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.irq_on = ata_irq_on,
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.port_start = ata_sff_port_start,
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};
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static struct ata_port_info pdc2027x_port_info[] = {
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/* PDC_UDMA_100 */
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{
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.flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SLAVE_POSS |
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ATA_FLAG_MMIO,
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.pio_mask = 0x1f, /* pio0-4 */
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.mwdma_mask = 0x07, /* mwdma0-2 */
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.udma_mask = ATA_UDMA5, /* udma0-5 */
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.port_ops = &pdc2027x_pata100_ops,
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},
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/* PDC_UDMA_133 */
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{
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.flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SLAVE_POSS |
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ATA_FLAG_MMIO,
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.pio_mask = 0x1f, /* pio0-4 */
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.mwdma_mask = 0x07, /* mwdma0-2 */
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.udma_mask = ATA_UDMA6, /* udma0-6 */
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.port_ops = &pdc2027x_pata133_ops,
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},
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};
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MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Albert Lee");
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MODULE_DESCRIPTION("libata driver module for Promise PDC20268 to PDC20277");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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MODULE_DEVICE_TABLE(pci, pdc2027x_pci_tbl);
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/**
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* port_mmio - Get the MMIO address of PDC2027x extended registers
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* @ap: Port
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* @offset: offset from mmio base
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*/
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static inline void __iomem *port_mmio(struct ata_port *ap, unsigned int offset)
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{
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return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset;
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}
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/**
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* dev_mmio - Get the MMIO address of PDC2027x extended registers
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* @ap: Port
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* @adev: device
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* @offset: offset from mmio base
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*/
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static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *adev, unsigned int offset)
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{
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u8 adj = (adev->devno) ? 0x08 : 0x00;
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return port_mmio(ap, offset) + adj;
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}
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/**
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* pdc2027x_pata_cable_detect - Probe host controller cable detect info
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* @ap: Port for which cable detect info is desired
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*
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* Read 80c cable indicator from Promise extended register.
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* This register is latched when the system is reset.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static int pdc2027x_cable_detect(struct ata_port *ap)
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{
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u32 cgcr;
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/* check cable detect results */
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cgcr = ioread32(port_mmio(ap, PDC_GLOBAL_CTL));
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if (cgcr & (1 << 26))
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goto cbl40;
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PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no);
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return ATA_CBL_PATA80;
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cbl40:
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printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no);
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return ATA_CBL_PATA40;
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}
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/**
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* pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled.
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* @ap: Port to check
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*/
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static inline int pdc2027x_port_enabled(struct ata_port *ap)
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{
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return ioread8(port_mmio(ap, PDC_ATA_CTL)) & 0x02;
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}
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/**
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* pdc2027x_prereset - prereset for PATA host controller
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* @link: Target link
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* @deadline: deadline jiffies for the operation
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*
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* Probeinit including cable detection.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline)
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{
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/* Check whether port enabled */
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if (!pdc2027x_port_enabled(link->ap))
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return -ENOENT;
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return ata_std_prereset(link, deadline);
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}
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/**
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* pdc2027x_error_handler - Perform reset on PATA port and classify
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* @ap: Port to reset
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*
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* Reset PATA phy and classify attached devices.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void pdc2027x_error_handler(struct ata_port *ap)
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{
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ata_bmdma_drive_eh(ap, pdc2027x_prereset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/**
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* pdc2720x_mode_filter - mode selection filter
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* @adev: ATA device
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* @mask: list of modes proposed
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*
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* Block UDMA on devices that cause trouble with this controller.
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*/
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static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask)
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{
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unsigned char model_num[ATA_ID_PROD_LEN + 1];
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struct ata_device *pair = ata_dev_pair(adev);
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if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL)
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return ata_pci_default_filter(adev, mask);
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/* Check for slave of a Maxtor at UDMA6 */
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ata_id_c_string(pair->id, model_num, ATA_ID_PROD,
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ATA_ID_PROD_LEN + 1);
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/* If the master is a maxtor in UDMA6 then the slave should not use UDMA 6 */
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if(strstr(model_num, "Maxtor") == 0 && pair->dma_mode == XFER_UDMA_6)
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mask &= ~ (1 << (6 + ATA_SHIFT_UDMA));
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return ata_pci_default_filter(adev, mask);
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}
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/**
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* pdc2027x_set_piomode - Initialize host controller PATA PIO timings
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* @ap: Port to configure
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* @adev: um
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* @pio: PIO mode, 0 - 4
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*
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* Set PIO mode for device.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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unsigned int pio = adev->pio_mode - XFER_PIO_0;
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u32 ctcr0, ctcr1;
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PDPRINTK("adev->pio_mode[%X]\n", adev->pio_mode);
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/* Sanity check */
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if (pio > 4) {
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printk(KERN_ERR DRV_NAME ": Unknown pio mode [%d] ignored\n", pio);
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return;
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}
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/* Set the PIO timing registers using value table for 133MHz */
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PDPRINTK("Set pio regs... \n");
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ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0));
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ctcr0 &= 0xffff0000;
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ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 |
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(pdc2027x_pio_timing_tbl[pio].value1 << 8);
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iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
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ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
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ctcr1 &= 0x00ffffff;
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ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24);
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iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
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PDPRINTK("Set pio regs done\n");
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PDPRINTK("Set to pio mode[%u] \n", pio);
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}
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/**
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* pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings
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* @ap: Port to configure
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* @adev: um
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* @udma: udma mode, XFER_UDMA_0 to XFER_UDMA_6
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*
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* Set UDMA mode for device.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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unsigned int dma_mode = adev->dma_mode;
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u32 ctcr0, ctcr1;
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if ((dma_mode >= XFER_UDMA_0) &&
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(dma_mode <= XFER_UDMA_6)) {
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/* Set the UDMA timing registers with value table for 133MHz */
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unsigned int udma_mode = dma_mode & 0x07;
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if (dma_mode == XFER_UDMA_2) {
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/*
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* Turn off tHOLD.
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* If tHOLD is '1', the hardware will add half clock for data hold time.
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* This code segment seems to be no effect. tHOLD will be overwritten below.
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*/
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ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
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iowrite32(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1));
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}
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PDPRINTK("Set udma regs... \n");
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ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
|
|
ctcr1 &= 0xff000000;
|
|
ctcr1 |= pdc2027x_udma_timing_tbl[udma_mode].value0 |
|
|
(pdc2027x_udma_timing_tbl[udma_mode].value1 << 8) |
|
|
(pdc2027x_udma_timing_tbl[udma_mode].value2 << 16);
|
|
iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
|
|
|
|
PDPRINTK("Set udma regs done\n");
|
|
|
|
PDPRINTK("Set to udma mode[%u] \n", udma_mode);
|
|
|
|
} else if ((dma_mode >= XFER_MW_DMA_0) &&
|
|
(dma_mode <= XFER_MW_DMA_2)) {
|
|
/* Set the MDMA timing registers with value table for 133MHz */
|
|
unsigned int mdma_mode = dma_mode & 0x07;
|
|
|
|
PDPRINTK("Set mdma regs... \n");
|
|
ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0));
|
|
|
|
ctcr0 &= 0x0000ffff;
|
|
ctcr0 |= (pdc2027x_mdma_timing_tbl[mdma_mode].value0 << 16) |
|
|
(pdc2027x_mdma_timing_tbl[mdma_mode].value1 << 24);
|
|
|
|
iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
|
|
PDPRINTK("Set mdma regs done\n");
|
|
|
|
PDPRINTK("Set to mdma mode[%u] \n", mdma_mode);
|
|
} else {
|
|
printk(KERN_ERR DRV_NAME ": Unknown dma mode [%u] ignored\n", dma_mode);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pdc2027x_set_mode - Set the timing registers back to correct values.
|
|
* @link: link to configure
|
|
* @r_failed: Returned device for failure
|
|
*
|
|
* The pdc2027x hardware will look at "SET FEATURES" and change the timing registers
|
|
* automatically. The values set by the hardware might be incorrect, under 133Mhz PLL.
|
|
* This function overwrites the possibly incorrect values set by the hardware to be correct.
|
|
*/
|
|
static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
struct ata_device *dev;
|
|
int rc;
|
|
|
|
rc = ata_do_set_mode(link, r_failed);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
ata_link_for_each_dev(dev, link) {
|
|
if (ata_dev_enabled(dev)) {
|
|
|
|
pdc2027x_set_piomode(ap, dev);
|
|
|
|
/*
|
|
* Enable prefetch if the device support PIO only.
|
|
*/
|
|
if (dev->xfer_shift == ATA_SHIFT_PIO) {
|
|
u32 ctcr1 = ioread32(dev_mmio(ap, dev, PDC_CTCR1));
|
|
ctcr1 |= (1 << 25);
|
|
iowrite32(ctcr1, dev_mmio(ap, dev, PDC_CTCR1));
|
|
|
|
PDPRINTK("Turn on prefetch\n");
|
|
} else {
|
|
pdc2027x_set_dmamode(ap, dev);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
|
|
* @qc: Metadata associated with taskfile to check
|
|
*
|
|
* LOCKING:
|
|
* None (inherited from caller).
|
|
*
|
|
* RETURNS: 0 when ATAPI DMA can be used
|
|
* 1 otherwise
|
|
*/
|
|
static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc)
|
|
{
|
|
struct scsi_cmnd *cmd = qc->scsicmd;
|
|
u8 *scsicmd = cmd->cmnd;
|
|
int rc = 1; /* atapi dma off by default */
|
|
|
|
/*
|
|
* This workaround is from Promise's GPL driver.
|
|
* If ATAPI DMA is used for commands not in the
|
|
* following white list, say MODE_SENSE and REQUEST_SENSE,
|
|
* pdc2027x might hit the irq lost problem.
|
|
*/
|
|
switch (scsicmd[0]) {
|
|
case READ_10:
|
|
case WRITE_10:
|
|
case READ_12:
|
|
case WRITE_12:
|
|
case READ_6:
|
|
case WRITE_6:
|
|
case 0xad: /* READ_DVD_STRUCTURE */
|
|
case 0xbe: /* READ_CD */
|
|
/* ATAPI DMA is ok */
|
|
rc = 0;
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* pdc_read_counter - Read the ctr counter
|
|
* @host: target ATA host
|
|
*/
|
|
|
|
static long pdc_read_counter(struct ata_host *host)
|
|
{
|
|
void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
|
|
long counter;
|
|
int retry = 1;
|
|
u32 bccrl, bccrh, bccrlv, bccrhv;
|
|
|
|
retry:
|
|
bccrl = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
|
|
bccrh = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
|
|
|
|
/* Read the counter values again for verification */
|
|
bccrlv = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
|
|
bccrhv = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
|
|
|
|
counter = (bccrh << 15) | bccrl;
|
|
|
|
PDPRINTK("bccrh [%X] bccrl [%X]\n", bccrh, bccrl);
|
|
PDPRINTK("bccrhv[%X] bccrlv[%X]\n", bccrhv, bccrlv);
|
|
|
|
/*
|
|
* The 30-bit decreasing counter are read by 2 pieces.
|
|
* Incorrect value may be read when both bccrh and bccrl are changing.
|
|
* Ex. When 7900 decrease to 78FF, wrong value 7800 might be read.
|
|
*/
|
|
if (retry && !(bccrh == bccrhv && bccrl >= bccrlv)) {
|
|
retry--;
|
|
PDPRINTK("rereading counter\n");
|
|
goto retry;
|
|
}
|
|
|
|
return counter;
|
|
}
|
|
|
|
/**
|
|
* adjust_pll - Adjust the PLL input clock in Hz.
|
|
*
|
|
* @pdc_controller: controller specific information
|
|
* @host: target ATA host
|
|
* @pll_clock: The input of PLL in HZ
|
|
*/
|
|
static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int board_idx)
|
|
{
|
|
void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
|
|
u16 pll_ctl;
|
|
long pll_clock_khz = pll_clock / 1000;
|
|
long pout_required = board_idx? PDC_133_MHZ:PDC_100_MHZ;
|
|
long ratio = pout_required / pll_clock_khz;
|
|
int F, R;
|
|
|
|
/* Sanity check */
|
|
if (unlikely(pll_clock_khz < 5000L || pll_clock_khz > 70000L)) {
|
|
printk(KERN_ERR DRV_NAME ": Invalid PLL input clock %ldkHz, give up!\n", pll_clock_khz);
|
|
return;
|
|
}
|
|
|
|
#ifdef PDC_DEBUG
|
|
PDPRINTK("pout_required is %ld\n", pout_required);
|
|
|
|
/* Show the current clock value of PLL control register
|
|
* (maybe already configured by the firmware)
|
|
*/
|
|
pll_ctl = ioread16(mmio_base + PDC_PLL_CTL);
|
|
|
|
PDPRINTK("pll_ctl[%X]\n", pll_ctl);
|
|
#endif
|
|
|
|
/*
|
|
* Calculate the ratio of F, R and OD
|
|
* POUT = (F + 2) / (( R + 2) * NO)
|
|
*/
|
|
if (ratio < 8600L) { /* 8.6x */
|
|
/* Using NO = 0x01, R = 0x0D */
|
|
R = 0x0d;
|
|
} else if (ratio < 12900L) { /* 12.9x */
|
|
/* Using NO = 0x01, R = 0x08 */
|
|
R = 0x08;
|
|
} else if (ratio < 16100L) { /* 16.1x */
|
|
/* Using NO = 0x01, R = 0x06 */
|
|
R = 0x06;
|
|
} else if (ratio < 64000L) { /* 64x */
|
|
R = 0x00;
|
|
} else {
|
|
/* Invalid ratio */
|
|
printk(KERN_ERR DRV_NAME ": Invalid ratio %ld, give up!\n", ratio);
|
|
return;
|
|
}
|
|
|
|
F = (ratio * (R+2)) / 1000 - 2;
|
|
|
|
if (unlikely(F < 0 || F > 127)) {
|
|
/* Invalid F */
|
|
printk(KERN_ERR DRV_NAME ": F[%d] invalid!\n", F);
|
|
return;
|
|
}
|
|
|
|
PDPRINTK("F[%d] R[%d] ratio*1000[%ld]\n", F, R, ratio);
|
|
|
|
pll_ctl = (R << 8) | F;
|
|
|
|
PDPRINTK("Writing pll_ctl[%X]\n", pll_ctl);
|
|
|
|
iowrite16(pll_ctl, mmio_base + PDC_PLL_CTL);
|
|
ioread16(mmio_base + PDC_PLL_CTL); /* flush */
|
|
|
|
/* Wait the PLL circuit to be stable */
|
|
mdelay(30);
|
|
|
|
#ifdef PDC_DEBUG
|
|
/*
|
|
* Show the current clock value of PLL control register
|
|
* (maybe configured by the firmware)
|
|
*/
|
|
pll_ctl = ioread16(mmio_base + PDC_PLL_CTL);
|
|
|
|
PDPRINTK("pll_ctl[%X]\n", pll_ctl);
|
|
#endif
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* detect_pll_input_clock - Detect the PLL input clock in Hz.
|
|
* @host: target ATA host
|
|
* Ex. 16949000 on 33MHz PCI bus for pdc20275.
|
|
* Half of the PCI clock.
|
|
*/
|
|
static long pdc_detect_pll_input_clock(struct ata_host *host)
|
|
{
|
|
void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
|
|
u32 scr;
|
|
long start_count, end_count;
|
|
struct timeval start_time, end_time;
|
|
long pll_clock, usec_elapsed;
|
|
|
|
/* Start the test mode */
|
|
scr = ioread32(mmio_base + PDC_SYS_CTL);
|
|
PDPRINTK("scr[%X]\n", scr);
|
|
iowrite32(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
|
|
ioread32(mmio_base + PDC_SYS_CTL); /* flush */
|
|
|
|
/* Read current counter value */
|
|
start_count = pdc_read_counter(host);
|
|
do_gettimeofday(&start_time);
|
|
|
|
/* Let the counter run for 100 ms. */
|
|
mdelay(100);
|
|
|
|
/* Read the counter values again */
|
|
end_count = pdc_read_counter(host);
|
|
do_gettimeofday(&end_time);
|
|
|
|
/* Stop the test mode */
|
|
scr = ioread32(mmio_base + PDC_SYS_CTL);
|
|
PDPRINTK("scr[%X]\n", scr);
|
|
iowrite32(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL);
|
|
ioread32(mmio_base + PDC_SYS_CTL); /* flush */
|
|
|
|
/* calculate the input clock in Hz */
|
|
usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
|
|
(end_time.tv_usec - start_time.tv_usec);
|
|
|
|
pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *
|
|
(100000000 / usec_elapsed);
|
|
|
|
PDPRINTK("start[%ld] end[%ld] \n", start_count, end_count);
|
|
PDPRINTK("PLL input clock[%ld]Hz\n", pll_clock);
|
|
|
|
return pll_clock;
|
|
}
|
|
|
|
/**
|
|
* pdc_hardware_init - Initialize the hardware.
|
|
* @host: target ATA host
|
|
* @board_idx: board identifier
|
|
*/
|
|
static int pdc_hardware_init(struct ata_host *host, unsigned int board_idx)
|
|
{
|
|
long pll_clock;
|
|
|
|
/*
|
|
* Detect PLL input clock rate.
|
|
* On some system, where PCI bus is running at non-standard clock rate.
|
|
* Ex. 25MHz or 40MHz, we have to adjust the cycle_time.
|
|
* The pdc20275 controller employs PLL circuit to help correct timing registers setting.
|
|
*/
|
|
pll_clock = pdc_detect_pll_input_clock(host);
|
|
|
|
dev_printk(KERN_INFO, host->dev, "PLL input clock %ld kHz\n", pll_clock/1000);
|
|
|
|
/* Adjust PLL control register */
|
|
pdc_adjust_pll(host, pll_clock, board_idx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pdc_ata_setup_port - setup the mmio address
|
|
* @port: ata ioports to setup
|
|
* @base: base address
|
|
*/
|
|
static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base)
|
|
{
|
|
port->cmd_addr =
|
|
port->data_addr = base;
|
|
port->feature_addr =
|
|
port->error_addr = base + 0x05;
|
|
port->nsect_addr = base + 0x0a;
|
|
port->lbal_addr = base + 0x0f;
|
|
port->lbam_addr = base + 0x10;
|
|
port->lbah_addr = base + 0x15;
|
|
port->device_addr = base + 0x1a;
|
|
port->command_addr =
|
|
port->status_addr = base + 0x1f;
|
|
port->altstatus_addr =
|
|
port->ctl_addr = base + 0x81a;
|
|
}
|
|
|
|
/**
|
|
* pdc2027x_init_one - PCI probe function
|
|
* Called when an instance of PCI adapter is inserted.
|
|
* This function checks whether the hardware is supported,
|
|
* initialize hardware and register an instance of ata_host to
|
|
* libata. (implements struct pci_driver.probe() )
|
|
*
|
|
* @pdev: instance of pci_dev found
|
|
* @ent: matching entry in the id_tbl[]
|
|
*/
|
|
static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
static int printed_version;
|
|
static const unsigned long cmd_offset[] = { 0x17c0, 0x15c0 };
|
|
static const unsigned long bmdma_offset[] = { 0x1000, 0x1008 };
|
|
unsigned int board_idx = (unsigned int) ent->driver_data;
|
|
const struct ata_port_info *ppi[] =
|
|
{ &pdc2027x_port_info[board_idx], NULL };
|
|
struct ata_host *host;
|
|
void __iomem *mmio_base;
|
|
int i, rc;
|
|
|
|
if (!printed_version++)
|
|
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
|
|
|
|
/* alloc host */
|
|
host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
|
|
if (!host)
|
|
return -ENOMEM;
|
|
|
|
/* acquire resources and fill host */
|
|
rc = pcim_enable_device(pdev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
|
|
if (rc)
|
|
return rc;
|
|
host->iomap = pcim_iomap_table(pdev);
|
|
|
|
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
|
|
if (rc)
|
|
return rc;
|
|
|
|
mmio_base = host->iomap[PDC_MMIO_BAR];
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
struct ata_port *ap = host->ports[i];
|
|
|
|
pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]);
|
|
ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i];
|
|
|
|
ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
|
|
ata_port_pbar_desc(ap, PDC_MMIO_BAR, cmd_offset[i], "cmd");
|
|
}
|
|
|
|
//pci_enable_intx(pdev);
|
|
|
|
/* initialize adapter */
|
|
if (pdc_hardware_init(host, board_idx) != 0)
|
|
return -EIO;
|
|
|
|
pci_set_master(pdev);
|
|
return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
|
|
&pdc2027x_sht);
|
|
}
|
|
|
|
/**
|
|
* pdc2027x_init - Called after this module is loaded into the kernel.
|
|
*/
|
|
static int __init pdc2027x_init(void)
|
|
{
|
|
return pci_register_driver(&pdc2027x_pci_driver);
|
|
}
|
|
|
|
/**
|
|
* pdc2027x_exit - Called before this module unloaded from the kernel
|
|
*/
|
|
static void __exit pdc2027x_exit(void)
|
|
{
|
|
pci_unregister_driver(&pdc2027x_pci_driver);
|
|
}
|
|
|
|
module_init(pdc2027x_init);
|
|
module_exit(pdc2027x_exit);
|