root/drivers/ide/cs5535.c

DEFINITIONS

1. cs5535_set_speed
2. cs5535_set_dma_mode
3. cs5535_set_pio_mode
4. cs5535_cable_detect
5. cs5535_init_one
6. cs5535_ide_init
7. cs5535_ide_exit

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
   4  * Copyright (C)      2007 Bartlomiej Zolnierkiewicz
   5  *
   6  * History:
   7  * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
   8  * - Reworked tuneproc, set_drive, misc mods to prep for mainline
   9  * - Work was sponsored by CIS (M) Sdn Bhd.
  10  * Ported to Kernel 2.6.11 on June 26, 2005 by
  11  *   Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
  12  *   Alexander Kiausch <alex.kiausch@t-online.de>
  13  * Originally developed by AMD for 2.4/2.6
  14  *
  15  * Development of this chipset driver was funded
  16  * by the nice folks at National Semiconductor/AMD.
  17  *
  18  * Documentation:
  19  *  CS5535 documentation available from AMD
  20  */
  21 
  22 #include <linux/module.h>
  23 #include <linux/pci.h>
  24 #include <linux/ide.h>
  25 
  26 #define DRV_NAME "cs5535"
  27 
  28 #define MSR_ATAC_BASE           0x51300000
  29 #define ATAC_GLD_MSR_CAP        (MSR_ATAC_BASE+0)
  30 #define ATAC_GLD_MSR_CONFIG     (MSR_ATAC_BASE+0x01)
  31 #define ATAC_GLD_MSR_SMI        (MSR_ATAC_BASE+0x02)
  32 #define ATAC_GLD_MSR_ERROR      (MSR_ATAC_BASE+0x03)
  33 #define ATAC_GLD_MSR_PM         (MSR_ATAC_BASE+0x04)
  34 #define ATAC_GLD_MSR_DIAG       (MSR_ATAC_BASE+0x05)
  35 #define ATAC_IO_BAR             (MSR_ATAC_BASE+0x08)
  36 #define ATAC_RESET              (MSR_ATAC_BASE+0x10)
  37 #define ATAC_CH0D0_PIO          (MSR_ATAC_BASE+0x20)
  38 #define ATAC_CH0D0_DMA          (MSR_ATAC_BASE+0x21)
  39 #define ATAC_CH0D1_PIO          (MSR_ATAC_BASE+0x22)
  40 #define ATAC_CH0D1_DMA          (MSR_ATAC_BASE+0x23)
  41 #define ATAC_PCI_ABRTERR        (MSR_ATAC_BASE+0x24)
  42 #define ATAC_BM0_CMD_PRIM       0x00
  43 #define ATAC_BM0_STS_PRIM       0x02
  44 #define ATAC_BM0_PRD            0x04
  45 #define CS5535_CABLE_DETECT     0x48
  46 
  47 /* Format I PIO settings. We separate out cmd and data for safer timings */
  48 
  49 static unsigned int cs5535_pio_cmd_timings[5] =
  50 { 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
  51 static unsigned int cs5535_pio_dta_timings[5] =
  52 { 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };
  53 
  54 static unsigned int cs5535_mwdma_timings[3] =
  55 { 0x7F0FFFF3, 0x7F035352, 0x7f024241 };
  56 
  57 static unsigned int cs5535_udma_timings[5] =
  58 { 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };
  59 
  60 /* Macros to check if the register is the reset value -  reset value is an
  61    invalid timing and indicates the register has not been set previously */
  62 
  63 #define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
  64 #define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )
  65 
  66 /****
  67  *      cs5535_set_speed         -     Configure the chipset to the new speed
  68  *      @drive: Drive to set up
  69  *      @speed: desired speed
  70  *
  71  *      cs5535_set_speed() configures the chipset to a new speed.
  72  */
  73 static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
  74 {
  75         u32 reg = 0, dummy;
  76         u8 unit = drive->dn & 1;
  77 
  78         /* Set the PIO timings */
  79         if (speed < XFER_SW_DMA_0) {
  80                 ide_drive_t *pair = ide_get_pair_dev(drive);
  81                 u8 cmd, pioa;
  82 
  83                 cmd = pioa = speed - XFER_PIO_0;
  84 
  85                 if (pair) {
  86                         u8 piob = pair->pio_mode - XFER_PIO_0;
  87 
  88                         if (piob < cmd)
  89                                 cmd = piob;
  90                 }
  91 
  92                 /* Write the speed of the current drive */
  93                 reg = (cs5535_pio_cmd_timings[cmd] << 16) |
  94                         cs5535_pio_dta_timings[pioa];
  95                 wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);
  96 
  97                 /* And if nessesary - change the speed of the other drive */
  98                 rdmsr(unit ?  ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);
  99 
 100                 if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
 101                         cs5535_pio_cmd_timings[cmd]) {
 102                         reg &= 0x0000FFFF;
 103                         reg |= cs5535_pio_cmd_timings[cmd] << 16;
 104                         wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
 105                 }
 106 
 107                 /* Set bit 31 of the DMA register for PIO format 1 timings */
 108                 rdmsr(unit ?  ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
 109                 wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
 110                                         reg | 0x80000000UL, 0);
 111         } else {
 112                 rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
 113 
 114                 reg &= 0x80000000UL;  /* Preserve the PIO format bit */
 115 
 116                 if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
 117                         reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
 118                 else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
 119                         reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
 120                 else
 121                         return;
 122 
 123                 wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
 124         }
 125 }
 126 
 127 /**
 128  *      cs5535_set_dma_mode     -       set host controller for DMA mode
 129  *      @hwif: port
 130  *      @drive: drive
 131  *
 132  *      Programs the chipset for DMA mode.
 133  */
 134 
 135 static void cs5535_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 136 {
 137         cs5535_set_speed(drive, drive->dma_mode);
 138 }
 139 
 140 /**
 141  *      cs5535_set_pio_mode     -       set host controller for PIO mode
 142  *      @hwif: port
 143  *      @drive: drive
 144  *
 145  *      A callback from the upper layers for PIO-only tuning.
 146  */
 147 
 148 static void cs5535_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 149 {
 150         cs5535_set_speed(drive, drive->pio_mode);
 151 }
 152 
 153 static u8 cs5535_cable_detect(ide_hwif_t *hwif)
 154 {
 155         struct pci_dev *dev = to_pci_dev(hwif->dev);
 156         u8 bit;
 157 
 158         /* if a 80 wire cable was detected */
 159         pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
 160 
 161         return (bit & 1) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
 162 }
 163 
 164 static const struct ide_port_ops cs5535_port_ops = {
 165         .set_pio_mode           = cs5535_set_pio_mode,
 166         .set_dma_mode           = cs5535_set_dma_mode,
 167         .cable_detect           = cs5535_cable_detect,
 168 };
 169 
 170 static const struct ide_port_info cs5535_chipset = {
 171         .name           = DRV_NAME,
 172         .port_ops       = &cs5535_port_ops,
 173         .host_flags     = IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE,
 174         .pio_mask       = ATA_PIO4,
 175         .mwdma_mask     = ATA_MWDMA2,
 176         .udma_mask      = ATA_UDMA4,
 177 };
 178 
 179 static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 180 {
 181         return ide_pci_init_one(dev, &cs5535_chipset, NULL);
 182 }
 183 
 184 static const struct pci_device_id cs5535_pci_tbl[] = {
 185         { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), 0 },
 186         { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5535_IDE), },
 187         { 0, },
 188 };
 189 
 190 MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);
 191 
 192 static struct pci_driver cs5535_pci_driver = {
 193         .name           = "CS5535_IDE",
 194         .id_table       = cs5535_pci_tbl,
 195         .probe          = cs5535_init_one,
 196         .remove         = ide_pci_remove,
 197         .suspend        = ide_pci_suspend,
 198         .resume         = ide_pci_resume,
 199 };
 200 
 201 static int __init cs5535_ide_init(void)
 202 {
 203         return ide_pci_register_driver(&cs5535_pci_driver);
 204 }
 205 
 206 static void __exit cs5535_ide_exit(void)
 207 {
 208         pci_unregister_driver(&cs5535_pci_driver);
 209 }
 210 
 211 module_init(cs5535_ide_init);
 212 module_exit(cs5535_ide_exit);
 213 
 214 MODULE_AUTHOR("AMD");
 215 MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
 216 MODULE_LICENSE("GPL");