3b2a5c7149
* Filter out "default" transfer mode values (0x00 - default PIO mode, 0x01 - default PIO mode w/ IORDY disabled) in write handler for obsoleted /proc/ide/hd?/settings:current_speed setting. Allowing "default" transfer mode values is a dangerous thing to do as we don't support programming controller to the "default" transfer mode and devices often use different values for the default and maximum PIO mode (i.e. PIO2 default and PIO4 maximum) so the controller will stay programmed for higher PIO mode while device will use the lower PIO mode. There is no functionality loss as by using special IOCTLs device can still be programmed to "default" transfer modes (it is only useful for debugging/testing purposes anyway). * Remove no longer needed IDE_HFLAG_ABUSE_SET_DMA_MODE host flag, it was previously used by few host drivers to program the controller to PIO0 timings for "default" transfer mode == 0x01 (although some host drivers would program invalid PIO timings instead). * Cleanup ide_set_xfer_rate() and add BUG_ON(). Suggested-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
209 lines
5.9 KiB
C
209 lines
5.9 KiB
C
/*
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* Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
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* Copyright (C) 2007 Bartlomiej Zolnierkiewicz
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*
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* History:
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* 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
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* - Reworked tuneproc, set_drive, misc mods to prep for mainline
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* - Work was sponsored by CIS (M) Sdn Bhd.
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* Ported to Kernel 2.6.11 on June 26, 2005 by
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* Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
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* Alexander Kiausch <alex.kiausch@t-online.de>
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* Originally developed by AMD for 2.4/2.6
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*
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* Development of this chipset driver was funded
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* by the nice folks at National Semiconductor/AMD.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* Documentation:
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* CS5535 documentation available from AMD
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#define MSR_ATAC_BASE 0x51300000
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#define ATAC_GLD_MSR_CAP (MSR_ATAC_BASE+0)
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#define ATAC_GLD_MSR_CONFIG (MSR_ATAC_BASE+0x01)
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#define ATAC_GLD_MSR_SMI (MSR_ATAC_BASE+0x02)
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#define ATAC_GLD_MSR_ERROR (MSR_ATAC_BASE+0x03)
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#define ATAC_GLD_MSR_PM (MSR_ATAC_BASE+0x04)
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#define ATAC_GLD_MSR_DIAG (MSR_ATAC_BASE+0x05)
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#define ATAC_IO_BAR (MSR_ATAC_BASE+0x08)
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#define ATAC_RESET (MSR_ATAC_BASE+0x10)
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#define ATAC_CH0D0_PIO (MSR_ATAC_BASE+0x20)
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#define ATAC_CH0D0_DMA (MSR_ATAC_BASE+0x21)
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#define ATAC_CH0D1_PIO (MSR_ATAC_BASE+0x22)
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#define ATAC_CH0D1_DMA (MSR_ATAC_BASE+0x23)
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#define ATAC_PCI_ABRTERR (MSR_ATAC_BASE+0x24)
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#define ATAC_BM0_CMD_PRIM 0x00
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#define ATAC_BM0_STS_PRIM 0x02
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#define ATAC_BM0_PRD 0x04
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#define CS5535_CABLE_DETECT 0x48
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/* Format I PIO settings. We separate out cmd and data for safer timings */
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static unsigned int cs5535_pio_cmd_timings[5] =
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{ 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
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static unsigned int cs5535_pio_dta_timings[5] =
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{ 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };
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static unsigned int cs5535_mwdma_timings[3] =
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{ 0x7F0FFFF3, 0x7F035352, 0x7f024241 };
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static unsigned int cs5535_udma_timings[5] =
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{ 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };
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/* Macros to check if the register is the reset value - reset value is an
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invalid timing and indicates the register has not been set previously */
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#define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
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#define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )
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/****
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* cs5535_set_speed - Configure the chipset to the new speed
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* @drive: Drive to set up
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* @speed: desired speed
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*
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* cs5535_set_speed() configures the chipset to a new speed.
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*/
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static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
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{
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u32 reg = 0, dummy;
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int unit = drive->select.b.unit;
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/* Set the PIO timings */
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if (speed < XFER_SW_DMA_0) {
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ide_drive_t *pair = ide_get_paired_drive(drive);
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u8 cmd, pioa;
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cmd = pioa = speed - XFER_PIO_0;
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if (pair->present) {
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u8 piob = ide_get_best_pio_mode(pair, 255, 4);
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if (piob < cmd)
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cmd = piob;
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}
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/* Write the speed of the current drive */
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reg = (cs5535_pio_cmd_timings[cmd] << 16) |
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cs5535_pio_dta_timings[pioa];
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wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);
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/* And if nessesary - change the speed of the other drive */
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rdmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);
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if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
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cs5535_pio_cmd_timings[cmd]) {
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reg &= 0x0000FFFF;
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reg |= cs5535_pio_cmd_timings[cmd] << 16;
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wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
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}
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/* Set bit 31 of the DMA register for PIO format 1 timings */
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rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
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wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
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reg | 0x80000000UL, 0);
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} else {
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rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
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reg &= 0x80000000UL; /* Preserve the PIO format bit */
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if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
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reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
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else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
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reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
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else
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return;
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wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
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}
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}
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/**
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* cs5535_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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* Programs the chipset for DMA mode.
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*/
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static void cs5535_set_dma_mode(ide_drive_t *drive, const u8 speed)
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{
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cs5535_set_speed(drive, speed);
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}
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/**
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* cs5535_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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* A callback from the upper layers for PIO-only tuning.
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*/
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static void cs5535_set_pio_mode(ide_drive_t *drive, const u8 pio)
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{
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cs5535_set_speed(drive, XFER_PIO_0 + pio);
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}
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static u8 __devinit cs5535_cable_detect(ide_hwif_t *hwif)
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{
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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u8 bit;
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/* if a 80 wire cable was detected */
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pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
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return (bit & 1) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
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}
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static const struct ide_port_ops cs5535_port_ops = {
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.set_pio_mode = cs5535_set_pio_mode,
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.set_dma_mode = cs5535_set_dma_mode,
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.cable_detect = cs5535_cable_detect,
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};
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static const struct ide_port_info cs5535_chipset __devinitdata = {
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.name = "CS5535",
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.port_ops = &cs5535_port_ops,
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.host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA4,
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};
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static int __devinit cs5535_init_one(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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return ide_setup_pci_device(dev, &cs5535_chipset);
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}
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static const struct pci_device_id cs5535_pci_tbl[] = {
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{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), 0 },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);
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static struct pci_driver driver = {
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.name = "CS5535_IDE",
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.id_table = cs5535_pci_tbl,
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.probe = cs5535_init_one,
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};
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static int __init cs5535_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(cs5535_ide_init);
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MODULE_AUTHOR("AMD");
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MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
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MODULE_LICENSE("GPL");
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