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