drivers/ata/ahci_qoriq.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Freescale QorIQ AHCI SATA platform driver
   4  *
   5  * Copyright 2015 Freescale, Inc.
   6  *   Tang Yuantian <Yuantian.Tang@freescale.com>
   7  */
   8
   9 #include <linux/acpi.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/pm.h>
  13 #include <linux/ahci_platform.h>
  14 #include <linux/device.h>
  15 #include <linux/of_address.h>
  16 #include <linux/of.h>
  17 #include <linux/of_device.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/libata.h>
  20 #include "ahci.h"
  21
  22 #define DRV_NAME "ahci-qoriq"
  23
  24 /* port register definition */
  25 #define PORT_PHY1       0xA8
  26 #define PORT_PHY2       0xAC
  27 #define PORT_PHY3       0xB0
  28 #define PORT_PHY4       0xB4
  29 #define PORT_PHY5       0xB8
  30 #define PORT_AXICC      0xBC
  31 #define PORT_TRANS      0xC8
  32
  33 /* port register default value */
  34 #define AHCI_PORT_PHY_1_CFG     0xa003fffe
  35 #define AHCI_PORT_PHY2_CFG      0x28184d1f
  36 #define AHCI_PORT_PHY3_CFG      0x0e081509
  37 #define AHCI_PORT_TRANS_CFG     0x08000029
  38 #define AHCI_PORT_AXICC_CFG     0x3fffffff
  39
  40 /* for ls1021a */
  41 #define LS1021A_PORT_PHY2       0x28183414
  42 #define LS1021A_PORT_PHY3       0x0e080e06
  43 #define LS1021A_PORT_PHY4       0x064a080b
  44 #define LS1021A_PORT_PHY5       0x2aa86470
  45 #define LS1021A_AXICC_ADDR      0xC0
  46
  47 #define SATA_ECC_DISABLE        0x00020000
  48 #define ECC_DIS_ARMV8_CH2       0x80000000
  49 #define ECC_DIS_LS1088A         0x40000000
  50
  51 enum ahci_qoriq_type {
  52         AHCI_LS1021A,
  53         AHCI_LS1028A,
  54         AHCI_LS1043A,
  55         AHCI_LS2080A,
  56         AHCI_LS1046A,
  57         AHCI_LS1088A,
  58         AHCI_LS2088A,
  59         AHCI_LX2160A,
  60 };
  61
  62 struct ahci_qoriq_priv {
  63         struct ccsr_ahci *reg_base;
  64         enum ahci_qoriq_type type;
  65         void __iomem *ecc_addr;
  66         bool is_dmacoherent;
  67 };
  68
  69 static bool ecc_initialized;
  70
  71 static const struct of_device_id ahci_qoriq_of_match[] = {
  72         { .compatible = "fsl,ls1021a-ahci", .data = (void *)AHCI_LS1021A},
  73         { .compatible = "fsl,ls1028a-ahci", .data = (void *)AHCI_LS1028A},
  74         { .compatible = "fsl,ls1043a-ahci", .data = (void *)AHCI_LS1043A},
  75         { .compatible = "fsl,ls2080a-ahci", .data = (void *)AHCI_LS2080A},
  76         { .compatible = "fsl,ls1046a-ahci", .data = (void *)AHCI_LS1046A},
  77         { .compatible = "fsl,ls1088a-ahci", .data = (void *)AHCI_LS1088A},
  78         { .compatible = "fsl,ls2088a-ahci", .data = (void *)AHCI_LS2088A},
  79         { .compatible = "fsl,lx2160a-ahci", .data = (void *)AHCI_LX2160A},
  80         { /* sentinel */ }
  81 };
  82 MODULE_DEVICE_TABLE(of, ahci_qoriq_of_match);
  83
  84 static const struct acpi_device_id ahci_qoriq_acpi_match[] = {
  85         {"NXP0004", .driver_data = (kernel_ulong_t)AHCI_LX2160A},
  86         { }
  87 };
  88 MODULE_DEVICE_TABLE(acpi, ahci_qoriq_acpi_match);
  89
  90 static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class,
  91                           unsigned long deadline)
  92 {
  93         const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
  94         void __iomem *port_mmio = ahci_port_base(link->ap);
  95         u32 px_cmd, px_is, px_val;
  96         struct ata_port *ap = link->ap;
  97         struct ahci_port_priv *pp = ap->private_data;
  98         struct ahci_host_priv *hpriv = ap->host->private_data;
  99         struct ahci_qoriq_priv *qoriq_priv = hpriv->plat_data;
 100         u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
 101         struct ata_taskfile tf;
 102         bool online;
 103         int rc;
 104         bool ls1021a_workaround = (qoriq_priv->type == AHCI_LS1021A);
 105
 106         hpriv->stop_engine(ap);
 107
 108         /*
 109          * There is a errata on ls1021a Rev1.0 and Rev2.0 which is:
 110          * A-009042: The device detection initialization sequence
 111          * mistakenly resets some registers.
 112          *
 113          * Workaround for this is:
 114          * The software should read and store PxCMD and PxIS values
 115          * before issuing the device detection initialization sequence.
 116          * After the sequence is complete, software should restore the
 117          * PxCMD and PxIS with the stored values.
 118          */
 119         if (ls1021a_workaround) {
 120                 px_cmd = readl(port_mmio + PORT_CMD);
 121                 px_is = readl(port_mmio + PORT_IRQ_STAT);
 122         }
 123
 124         /* clear D2H reception area to properly wait for D2H FIS */
 125         ata_tf_init(link->device, &tf);
 126         tf.status = ATA_BUSY;
 127         ata_tf_to_fis(&tf, 0, 0, d2h_fis);
 128
 129         rc = sata_link_hardreset(link, timing, deadline, &online,
 130                                  ahci_check_ready);
 131
 132         /* restore the PxCMD and PxIS on ls1021 */
 133         if (ls1021a_workaround) {
 134                 px_val = readl(port_mmio + PORT_CMD);
 135                 if (px_val != px_cmd)
 136                         writel(px_cmd, port_mmio + PORT_CMD);
 137
 138                 px_val = readl(port_mmio + PORT_IRQ_STAT);
 139                 if (px_val != px_is)
 140                         writel(px_is, port_mmio + PORT_IRQ_STAT);
 141         }
 142
 143         hpriv->start_engine(ap);
 144
 145         if (online)
 146                 *class = ahci_dev_classify(ap);
 147         return rc;
 148 }
 149
 150 static struct ata_port_operations ahci_qoriq_ops = {
 151         .inherits       = &ahci_ops,
 152         .hardreset      = ahci_qoriq_hardreset,
 153 };
 154
 155 static const struct ata_port_info ahci_qoriq_port_info = {
 156         .flags          = AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
 157         .pio_mask       = ATA_PIO4,
 158         .udma_mask      = ATA_UDMA6,
 159         .port_ops       = &ahci_qoriq_ops,
 160 };
 161
 162 static struct scsi_host_template ahci_qoriq_sht = {
 163         AHCI_SHT(DRV_NAME),
 164 };
 165
 166 static int ahci_qoriq_phy_init(struct ahci_host_priv *hpriv)
 167 {
 168         struct ahci_qoriq_priv *qpriv = hpriv->plat_data;
 169         void __iomem *reg_base = hpriv->mmio;
 170
 171         switch (qpriv->type) {
 172         case AHCI_LS1021A:
 173                 if (!(qpriv->ecc_addr || ecc_initialized))
 174                         return -EINVAL;
 175                 else if (qpriv->ecc_addr && !ecc_initialized)
 176                         writel(SATA_ECC_DISABLE, qpriv->ecc_addr);
 177                 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
 178                 writel(LS1021A_PORT_PHY2, reg_base + PORT_PHY2);
 179                 writel(LS1021A_PORT_PHY3, reg_base + PORT_PHY3);
 180                 writel(LS1021A_PORT_PHY4, reg_base + PORT_PHY4);
 181                 writel(LS1021A_PORT_PHY5, reg_base + PORT_PHY5);
 182                 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
 183                 if (qpriv->is_dmacoherent)
 184                         writel(AHCI_PORT_AXICC_CFG,
 185                                         reg_base + LS1021A_AXICC_ADDR);
 186                 break;
 187
 188         case AHCI_LS1043A:
 189                 if (!(qpriv->ecc_addr || ecc_initialized))
 190                         return -EINVAL;
 191                 else if (qpriv->ecc_addr && !ecc_initialized)
 192                         writel(readl(qpriv->ecc_addr) |
 193                                ECC_DIS_ARMV8_CH2,
 194                                qpriv->ecc_addr);
 195                 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
 196                 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
 197                 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
 198                 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
 199                 if (qpriv->is_dmacoherent)
 200                         writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
 201                 break;
 202
 203         case AHCI_LS2080A:
 204                 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
 205                 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
 206                 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
 207                 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
 208                 if (qpriv->is_dmacoherent)
 209                         writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
 210                 break;
 211
 212         case AHCI_LS1046A:
 213                 if (!(qpriv->ecc_addr || ecc_initialized))
 214                         return -EINVAL;
 215                 else if (qpriv->ecc_addr && !ecc_initialized)
 216                         writel(readl(qpriv->ecc_addr) |
 217                                ECC_DIS_ARMV8_CH2,
 218                                qpriv->ecc_addr);
 219                 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
 220                 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
 221                 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
 222                 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
 223                 if (qpriv->is_dmacoherent)
 224                         writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
 225                 break;
 226
 227         case AHCI_LS1028A:
 228         case AHCI_LS1088A:
 229         case AHCI_LX2160A:
 230                 if (!(qpriv->ecc_addr || ecc_initialized))
 231                         return -EINVAL;
 232                 else if (qpriv->ecc_addr && !ecc_initialized)
 233                         writel(readl(qpriv->ecc_addr) |
 234                                ECC_DIS_LS1088A,
 235                                qpriv->ecc_addr);
 236                 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
 237                 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
 238                 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
 239                 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
 240                 if (qpriv->is_dmacoherent)
 241                         writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
 242                 break;
 243
 244         case AHCI_LS2088A:
 245                 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
 246                 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
 247                 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
 248                 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
 249                 if (qpriv->is_dmacoherent)
 250                         writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
 251                 break;
 252         }
 253
 254         ecc_initialized = true;
 255         return 0;
 256 }
 257
 258 static int ahci_qoriq_probe(struct platform_device *pdev)
 259 {
 260         struct device_node *np = pdev->dev.of_node;
 261         const struct acpi_device_id *acpi_id;
 262         struct device *dev = &pdev->dev;
 263         struct ahci_host_priv *hpriv;
 264         struct ahci_qoriq_priv *qoriq_priv;
 265         const struct of_device_id *of_id;
 266         struct resource *res;
 267         int rc;
 268
 269         hpriv = ahci_platform_get_resources(pdev, 0);
 270         if (IS_ERR(hpriv))
 271                 return PTR_ERR(hpriv);
 272
 273         of_id = of_match_node(ahci_qoriq_of_match, np);
 274         acpi_id = acpi_match_device(ahci_qoriq_acpi_match, &pdev->dev);
 275         if (!(of_id || acpi_id))
 276                 return -ENODEV;
 277
 278         qoriq_priv = devm_kzalloc(dev, sizeof(*qoriq_priv), GFP_KERNEL);
 279         if (!qoriq_priv)
 280                 return -ENOMEM;
 281
 282         if (of_id)
 283                 qoriq_priv->type = (enum ahci_qoriq_type)of_id->data;
 284         else
 285                 qoriq_priv->type = (enum ahci_qoriq_type)acpi_id->driver_data;
 286
 287         if (unlikely(!ecc_initialized)) {
 288                 res = platform_get_resource_byname(pdev,
 289                                                    IORESOURCE_MEM,
 290                                                    "sata-ecc");
 291                 if (res) {
 292                         qoriq_priv->ecc_addr =
 293                                 devm_ioremap_resource(dev, res);
 294                         if (IS_ERR(qoriq_priv->ecc_addr))
 295                                 return PTR_ERR(qoriq_priv->ecc_addr);
 296                 }
 297         }
 298
 299         if (device_get_dma_attr(&pdev->dev) == DEV_DMA_COHERENT)
 300                 qoriq_priv->is_dmacoherent = true;
 301
 302         rc = ahci_platform_enable_resources(hpriv);
 303         if (rc)
 304                 return rc;
 305
 306         hpriv->plat_data = qoriq_priv;
 307         rc = ahci_qoriq_phy_init(hpriv);
 308         if (rc)
 309                 goto disable_resources;
 310
 311         rc = ahci_platform_init_host(pdev, hpriv, &ahci_qoriq_port_info,
 312                                      &ahci_qoriq_sht);
 313         if (rc)
 314                 goto disable_resources;
 315
 316         return 0;
 317
 318 disable_resources:
 319         ahci_platform_disable_resources(hpriv);
 320
 321         return rc;
 322 }
 323
 324 #ifdef CONFIG_PM_SLEEP
 325 static int ahci_qoriq_resume(struct device *dev)
 326 {
 327         struct ata_host *host = dev_get_drvdata(dev);
 328         struct ahci_host_priv *hpriv = host->private_data;
 329         int rc;
 330
 331         rc = ahci_platform_enable_resources(hpriv);
 332         if (rc)
 333                 return rc;
 334
 335         rc = ahci_qoriq_phy_init(hpriv);
 336         if (rc)
 337                 goto disable_resources;
 338
 339         rc = ahci_platform_resume_host(dev);
 340         if (rc)
 341                 goto disable_resources;
 342
 343         /* We resumed so update PM runtime state */
 344         pm_runtime_disable(dev);
 345         pm_runtime_set_active(dev);
 346         pm_runtime_enable(dev);
 347
 348         return 0;
 349
 350 disable_resources:
 351         ahci_platform_disable_resources(hpriv);
 352
 353         return rc;
 354 }
 355 #endif
 356
 357 static SIMPLE_DEV_PM_OPS(ahci_qoriq_pm_ops, ahci_platform_suspend,
 358                          ahci_qoriq_resume);
 359
 360 static struct platform_driver ahci_qoriq_driver = {
 361         .probe = ahci_qoriq_probe,
 362         .remove = ata_platform_remove_one,
 363         .driver = {
 364                 .name = DRV_NAME,
 365                 .of_match_table = ahci_qoriq_of_match,
 366                 .acpi_match_table = ahci_qoriq_acpi_match,
 367                 .pm = &ahci_qoriq_pm_ops,
 368         },
 369 };
 370 module_platform_driver(ahci_qoriq_driver);
 371
 372 MODULE_DESCRIPTION("Freescale QorIQ AHCI SATA platform driver");
 373 MODULE_AUTHOR("Tang Yuantian <Yuantian.Tang@freescale.com>");
 374 MODULE_LICENSE("GPL");