drivers/ata/sata_uli.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  sata_uli.c - ULi Electronics SATA
   4  *
   5  *  libata documentation is available via 'make {ps|pdf}docs',
   6  *  as Documentation/driver-api/libata.rst
   7  *
   8  *  Hardware documentation available under NDA.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/gfp.h>
  14 #include <linux/pci.h>
  15 #include <linux/blkdev.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/device.h>
  19 #include <scsi/scsi_host.h>
  20 #include <linux/libata.h>
  21
  22 #define DRV_NAME        "sata_uli"
  23 #define DRV_VERSION     "1.3"
  24
  25 enum {
  26         uli_5289                = 0,
  27         uli_5287                = 1,
  28         uli_5281                = 2,
  29
  30         uli_max_ports           = 4,
  31
  32         /* PCI configuration registers */
  33         ULI5287_BASE            = 0x90, /* sata0 phy SCR registers */
  34         ULI5287_OFFS            = 0x10, /* offset from sata0->sata1 phy regs */
  35         ULI5281_BASE            = 0x60, /* sata0 phy SCR  registers */
  36         ULI5281_OFFS            = 0x60, /* offset from sata0->sata1 phy regs */
  37 };
  38
  39 struct uli_priv {
  40         unsigned int            scr_cfg_addr[uli_max_ports];
  41 };
  42
  43 static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
  44 static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
  45 static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
  46
  47 static const struct pci_device_id uli_pci_tbl[] = {
  48         { PCI_VDEVICE(AL, 0x5289), uli_5289 },
  49         { PCI_VDEVICE(AL, 0x5287), uli_5287 },
  50         { PCI_VDEVICE(AL, 0x5281), uli_5281 },
  51
  52         { }     /* terminate list */
  53 };
  54
  55 static struct pci_driver uli_pci_driver = {
  56         .name                   = DRV_NAME,
  57         .id_table               = uli_pci_tbl,
  58         .probe                  = uli_init_one,
  59         .remove                 = ata_pci_remove_one,
  60 };
  61
  62 static struct scsi_host_template uli_sht = {
  63         ATA_BMDMA_SHT(DRV_NAME),
  64 };
  65
  66 static struct ata_port_operations uli_ops = {
  67         .inherits               = &ata_bmdma_port_ops,
  68         .scr_read               = uli_scr_read,
  69         .scr_write              = uli_scr_write,
  70         .hardreset              = ATA_OP_NULL,
  71 };
  72
  73 static const struct ata_port_info uli_port_info = {
  74         .flags          = ATA_FLAG_SATA | ATA_FLAG_IGN_SIMPLEX,
  75         .pio_mask       = ATA_PIO4,
  76         .udma_mask      = ATA_UDMA6,
  77         .port_ops       = &uli_ops,
  78 };
  79
  80
  81 MODULE_AUTHOR("Peer Chen");
  82 MODULE_DESCRIPTION("low-level driver for ULi Electronics SATA controller");
  83 MODULE_LICENSE("GPL");
  84 MODULE_DEVICE_TABLE(pci, uli_pci_tbl);
  85 MODULE_VERSION(DRV_VERSION);
  86
  87 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
  88 {
  89         struct uli_priv *hpriv = ap->host->private_data;
  90         return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg);
  91 }
  92
  93 static u32 uli_scr_cfg_read(struct ata_link *link, unsigned int sc_reg)
  94 {
  95         struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
  96         unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg);
  97         u32 val;
  98
  99         pci_read_config_dword(pdev, cfg_addr, &val);
 100         return val;
 101 }
 102
 103 static void uli_scr_cfg_write(struct ata_link *link, unsigned int scr, u32 val)
 104 {
 105         struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
 106         unsigned int cfg_addr = get_scr_cfg_addr(link->ap, scr);
 107
 108         pci_write_config_dword(pdev, cfg_addr, val);
 109 }
 110
 111 static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
 112 {
 113         if (sc_reg > SCR_CONTROL)
 114                 return -EINVAL;
 115
 116         *val = uli_scr_cfg_read(link, sc_reg);
 117         return 0;
 118 }
 119
 120 static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
 121 {
 122         if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
 123                 return -EINVAL;
 124
 125         uli_scr_cfg_write(link, sc_reg, val);
 126         return 0;
 127 }
 128
 129 static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 130 {
 131         const struct ata_port_info *ppi[] = { &uli_port_info, NULL };
 132         unsigned int board_idx = (unsigned int) ent->driver_data;
 133         struct ata_host *host;
 134         struct uli_priv *hpriv;
 135         void __iomem * const *iomap;
 136         struct ata_ioports *ioaddr;
 137         int n_ports, rc;
 138
 139         ata_print_version_once(&pdev->dev, DRV_VERSION);
 140
 141         rc = pcim_enable_device(pdev);
 142         if (rc)
 143                 return rc;
 144
 145         n_ports = 2;
 146         if (board_idx == uli_5287)
 147                 n_ports = 4;
 148
 149         /* allocate the host */
 150         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
 151         if (!host)
 152                 return -ENOMEM;
 153
 154         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
 155         if (!hpriv)
 156                 return -ENOMEM;
 157         host->private_data = hpriv;
 158
 159         /* the first two ports are standard SFF */
 160         rc = ata_pci_sff_init_host(host);
 161         if (rc)
 162                 return rc;
 163
 164         ata_pci_bmdma_init(host);
 165
 166         iomap = host->iomap;
 167
 168         switch (board_idx) {
 169         case uli_5287:
 170                 /* If there are four, the last two live right after
 171                  * the standard SFF ports.
 172                  */
 173                 hpriv->scr_cfg_addr[0] = ULI5287_BASE;
 174                 hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
 175
 176                 ioaddr = &host->ports[2]->ioaddr;
 177                 ioaddr->cmd_addr = iomap[0] + 8;
 178                 ioaddr->altstatus_addr =
 179                 ioaddr->ctl_addr = (void __iomem *)
 180                         ((unsigned long)iomap[1] | ATA_PCI_CTL_OFS) + 4;
 181                 ioaddr->bmdma_addr = iomap[4] + 16;
 182                 hpriv->scr_cfg_addr[2] = ULI5287_BASE + ULI5287_OFFS*4;
 183                 ata_sff_std_ports(ioaddr);
 184
 185                 ata_port_desc(host->ports[2],
 186                         "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
 187                         (unsigned long long)pci_resource_start(pdev, 0) + 8,
 188                         ((unsigned long long)pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4,
 189                         (unsigned long long)pci_resource_start(pdev, 4) + 16);
 190
 191                 ioaddr = &host->ports[3]->ioaddr;
 192                 ioaddr->cmd_addr = iomap[2] + 8;
 193                 ioaddr->altstatus_addr =
 194                 ioaddr->ctl_addr = (void __iomem *)
 195                         ((unsigned long)iomap[3] | ATA_PCI_CTL_OFS) + 4;
 196                 ioaddr->bmdma_addr = iomap[4] + 24;
 197                 hpriv->scr_cfg_addr[3] = ULI5287_BASE + ULI5287_OFFS*5;
 198                 ata_sff_std_ports(ioaddr);
 199
 200                 ata_port_desc(host->ports[2],
 201                         "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
 202                         (unsigned long long)pci_resource_start(pdev, 2) + 9,
 203                         ((unsigned long long)pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4,
 204                         (unsigned long long)pci_resource_start(pdev, 4) + 24);
 205
 206                 break;
 207
 208         case uli_5289:
 209                 hpriv->scr_cfg_addr[0] = ULI5287_BASE;
 210                 hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
 211                 break;
 212
 213         case uli_5281:
 214                 hpriv->scr_cfg_addr[0] = ULI5281_BASE;
 215                 hpriv->scr_cfg_addr[1] = ULI5281_BASE + ULI5281_OFFS;
 216                 break;
 217
 218         default:
 219                 BUG();
 220                 break;
 221         }
 222
 223         pci_set_master(pdev);
 224         pci_intx(pdev, 1);
 225         return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
 226                                  IRQF_SHARED, &uli_sht);
 227 }
 228
 229 module_pci_driver(uli_pci_driver);