drivers/ide/it8213.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ITE 8213 IDE driver
   4  *
   5  * Copyright (C) 2006 Jack Lee
   6  * Copyright (C) 2006 Alan Cox
   7  * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/types.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/ide.h>
  15 #include <linux/init.h>
  16
  17 #define DRV_NAME "it8213"
  18
  19 /**
  20  *      it8213_set_pio_mode     -       set host controller for PIO mode
  21  *      @hwif: port
  22  *      @drive: drive
  23  *
  24  *      Set the interface PIO mode.
  25  */
  26
  27 static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  28 {
  29         struct pci_dev *dev     = to_pci_dev(hwif->dev);
  30         int is_slave            = drive->dn & 1;
  31         int master_port         = 0x40;
  32         int slave_port          = 0x44;
  33         unsigned long flags;
  34         u16 master_data;
  35         u8 slave_data;
  36         static DEFINE_SPINLOCK(tune_lock);
  37         int control = 0;
  38         const u8 pio = drive->pio_mode - XFER_PIO_0;
  39
  40         static const u8 timings[][2] = {
  41                                         { 0, 0 },
  42                                         { 0, 0 },
  43                                         { 1, 0 },
  44                                         { 2, 1 },
  45                                         { 2, 3 }, };
  46
  47         spin_lock_irqsave(&tune_lock, flags);
  48         pci_read_config_word(dev, master_port, &master_data);
  49
  50         if (pio > 1)
  51                 control |= 1;   /* Programmable timing on */
  52         if (drive->media != ide_disk)
  53                 control |= 4;   /* ATAPI */
  54         if (ide_pio_need_iordy(drive, pio))
  55                 control |= 2;   /* IORDY */
  56         if (is_slave) {
  57                 master_data |=  0x4000;
  58                 master_data &= ~0x0070;
  59                 if (pio > 1)
  60                         master_data = master_data | (control << 4);
  61                 pci_read_config_byte(dev, slave_port, &slave_data);
  62                 slave_data = slave_data & 0xf0;
  63                 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
  64         } else {
  65                 master_data &= ~0x3307;
  66                 if (pio > 1)
  67                         master_data = master_data | control;
  68                 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
  69         }
  70         pci_write_config_word(dev, master_port, master_data);
  71         if (is_slave)
  72                 pci_write_config_byte(dev, slave_port, slave_data);
  73         spin_unlock_irqrestore(&tune_lock, flags);
  74 }
  75
  76 /**
  77  *      it8213_set_dma_mode     -       set host controller for DMA mode
  78  *      @hwif: port
  79  *      @drive: drive
  80  *
  81  *      Tune the ITE chipset for the DMA mode.
  82  */
  83
  84 static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  85 {
  86         struct pci_dev *dev     = to_pci_dev(hwif->dev);
  87         u8 maslave              = 0x40;
  88         int a_speed             = 3 << (drive->dn * 4);
  89         int u_flag              = 1 << drive->dn;
  90         int v_flag              = 0x01 << drive->dn;
  91         int w_flag              = 0x10 << drive->dn;
  92         int u_speed             = 0;
  93         u16                     reg4042, reg4a;
  94         u8                      reg48, reg54, reg55;
  95         const u8 speed          = drive->dma_mode;
  96
  97         pci_read_config_word(dev, maslave, &reg4042);
  98         pci_read_config_byte(dev, 0x48, &reg48);
  99         pci_read_config_word(dev, 0x4a, &reg4a);
 100         pci_read_config_byte(dev, 0x54, &reg54);
 101         pci_read_config_byte(dev, 0x55, &reg55);
 102
 103         if (speed >= XFER_UDMA_0) {
 104                 u8 udma = speed - XFER_UDMA_0;
 105
 106                 u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
 107
 108                 if (!(reg48 & u_flag))
 109                         pci_write_config_byte(dev, 0x48, reg48 | u_flag);
 110                 if (speed >= XFER_UDMA_5)
 111                         pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
 112                 else
 113                         pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
 114
 115                 if ((reg4a & a_speed) != u_speed)
 116                         pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
 117                 if (speed > XFER_UDMA_2) {
 118                         if (!(reg54 & v_flag))
 119                                 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
 120                 } else
 121                         pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
 122         } else {
 123                 const u8 mwdma_to_pio[] = { 0, 3, 4 };
 124
 125                 if (reg48 & u_flag)
 126                         pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
 127                 if (reg4a & a_speed)
 128                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 129                 if (reg54 & v_flag)
 130                         pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
 131                 if (reg55 & w_flag)
 132                         pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
 133
 134                 if (speed >= XFER_MW_DMA_0)
 135                         drive->pio_mode =
 136                                 mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
 137                 else
 138                         drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
 139
 140                 it8213_set_pio_mode(hwif, drive);
 141         }
 142 }
 143
 144 static u8 it8213_cable_detect(ide_hwif_t *hwif)
 145 {
 146         struct pci_dev *dev = to_pci_dev(hwif->dev);
 147         u8 reg42h = 0;
 148
 149         pci_read_config_byte(dev, 0x42, &reg42h);
 150
 151         return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 152 }
 153
 154 static const struct ide_port_ops it8213_port_ops = {
 155         .set_pio_mode           = it8213_set_pio_mode,
 156         .set_dma_mode           = it8213_set_dma_mode,
 157         .cable_detect           = it8213_cable_detect,
 158 };
 159
 160 static const struct ide_port_info it8213_chipset = {
 161         .name           = DRV_NAME,
 162         .enablebits     = { {0x41, 0x80, 0x80} },
 163         .port_ops       = &it8213_port_ops,
 164         .host_flags     = IDE_HFLAG_SINGLE,
 165         .pio_mask       = ATA_PIO4,
 166         .swdma_mask     = ATA_SWDMA2_ONLY,
 167         .mwdma_mask     = ATA_MWDMA12_ONLY,
 168         .udma_mask      = ATA_UDMA6,
 169 };
 170
 171 /**
 172  *      it8213_init_one -       pci layer discovery entry
 173  *      @dev: PCI device
 174  *      @id: ident table entry
 175  *
 176  *      Called by the PCI code when it finds an ITE8213 controller. As
 177  *      this device follows the standard interfaces we can use the
 178  *      standard helper functions to do almost all the work for us.
 179  */
 180
 181 static int it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 182 {
 183         return ide_pci_init_one(dev, &it8213_chipset, NULL);
 184 }
 185
 186 static const struct pci_device_id it8213_pci_tbl[] = {
 187         { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
 188         { 0, },
 189 };
 190
 191 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
 192
 193 static struct pci_driver it8213_pci_driver = {
 194         .name           = "ITE8213_IDE",
 195         .id_table       = it8213_pci_tbl,
 196         .probe          = it8213_init_one,
 197         .remove         = ide_pci_remove,
 198         .suspend        = ide_pci_suspend,
 199         .resume         = ide_pci_resume,
 200 };
 201
 202 static int __init it8213_ide_init(void)
 203 {
 204         return ide_pci_register_driver(&it8213_pci_driver);
 205 }
 206
 207 static void __exit it8213_ide_exit(void)
 208 {
 209         pci_unregister_driver(&it8213_pci_driver);
 210 }
 211
 212 module_init(it8213_ide_init);
 213 module_exit(it8213_ide_exit);
 214
 215 MODULE_AUTHOR("Jack Lee, Alan Cox");
 216 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
 217 MODULE_LICENSE("GPL");