1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * copyright (c) 2013 Freescale Semiconductor, Inc. 4 * Freescale IMX AHCI SATA platform driver 5 * 6 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/platform_device.h> 12 #include <linux/regmap.h> 13 #include <linux/ahci_platform.h> 14 #include <linux/gpio/consumer.h> 15 #include <linux/of_device.h> 16 #include <linux/mfd/syscon.h> 17 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> 18 #include <linux/libata.h> 19 #include <linux/hwmon.h> 20 #include <linux/hwmon-sysfs.h> 21 #include <linux/thermal.h> 22 #include "ahci.h" 23 24 #define DRV_NAME "ahci-imx" 25 26 enum { 27 /* Timer 1-ms Register */ 28 IMX_TIMER1MS = 0x00e0, 29 /* Port0 PHY Control Register */ 30 IMX_P0PHYCR = 0x0178, 31 IMX_P0PHYCR_TEST_PDDQ = 1 << 20, 32 IMX_P0PHYCR_CR_READ = 1 << 19, 33 IMX_P0PHYCR_CR_WRITE = 1 << 18, 34 IMX_P0PHYCR_CR_CAP_DATA = 1 << 17, 35 IMX_P0PHYCR_CR_CAP_ADDR = 1 << 16, 36 /* Port0 PHY Status Register */ 37 IMX_P0PHYSR = 0x017c, 38 IMX_P0PHYSR_CR_ACK = 1 << 18, 39 IMX_P0PHYSR_CR_DATA_OUT = 0xffff << 0, 40 /* Lane0 Output Status Register */ 41 IMX_LANE0_OUT_STAT = 0x2003, 42 IMX_LANE0_OUT_STAT_RX_PLL_STATE = 1 << 1, 43 /* Clock Reset Register */ 44 IMX_CLOCK_RESET = 0x7f3f, 45 IMX_CLOCK_RESET_RESET = 1 << 0, 46 /* IMX8QM HSIO AHCI definitions */ 47 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET = 0x03, 48 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET = 0x09, 49 IMX8QM_SATA_PHY_IMPED_RATIO_85OHM = 0x6c, 50 IMX8QM_LPCG_PHYX2_OFFSET = 0x00000, 51 IMX8QM_CSR_PHYX2_OFFSET = 0x90000, 52 IMX8QM_CSR_PHYX1_OFFSET = 0xa0000, 53 IMX8QM_CSR_PHYX_STTS0_OFFSET = 0x4, 54 IMX8QM_CSR_PCIEA_OFFSET = 0xb0000, 55 IMX8QM_CSR_PCIEB_OFFSET = 0xc0000, 56 IMX8QM_CSR_SATA_OFFSET = 0xd0000, 57 IMX8QM_CSR_PCIE_CTRL2_OFFSET = 0x8, 58 IMX8QM_CSR_MISC_OFFSET = 0xe0000, 59 60 IMX8QM_LPCG_PHYX2_PCLK0_MASK = (0x3 << 16), 61 IMX8QM_LPCG_PHYX2_PCLK1_MASK = (0x3 << 20), 62 IMX8QM_PHY_APB_RSTN_0 = BIT(0), 63 IMX8QM_PHY_MODE_SATA = BIT(19), 64 IMX8QM_PHY_MODE_MASK = (0xf << 17), 65 IMX8QM_PHY_PIPE_RSTN_0 = BIT(24), 66 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0 = BIT(25), 67 IMX8QM_PHY_PIPE_RSTN_1 = BIT(26), 68 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1 = BIT(27), 69 IMX8QM_STTS0_LANE0_TX_PLL_LOCK = BIT(4), 70 IMX8QM_MISC_IOB_RXENA = BIT(0), 71 IMX8QM_MISC_IOB_TXENA = BIT(1), 72 IMX8QM_MISC_PHYX1_EPCS_SEL = BIT(12), 73 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 = BIT(24), 74 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 = BIT(25), 75 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 = BIT(28), 76 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0 = BIT(29), 77 IMX8QM_SATA_CTRL_RESET_N = BIT(12), 78 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N = BIT(7), 79 IMX8QM_CTRL_BUTTON_RST_N = BIT(21), 80 IMX8QM_CTRL_POWER_UP_RST_N = BIT(23), 81 IMX8QM_CTRL_LTSSM_ENABLE = BIT(4), 82 }; 83 84 enum ahci_imx_type { 85 AHCI_IMX53, 86 AHCI_IMX6Q, 87 AHCI_IMX6QP, 88 AHCI_IMX8QM, 89 }; 90 91 struct imx_ahci_priv { 92 struct platform_device *ahci_pdev; 93 enum ahci_imx_type type; 94 struct clk *sata_clk; 95 struct clk *sata_ref_clk; 96 struct clk *ahb_clk; 97 struct clk *epcs_tx_clk; 98 struct clk *epcs_rx_clk; 99 struct clk *phy_apbclk; 100 struct clk *phy_pclk0; 101 struct clk *phy_pclk1; 102 void __iomem *phy_base; 103 struct gpio_desc *clkreq_gpiod; 104 struct regmap *gpr; 105 bool no_device; 106 bool first_time; 107 u32 phy_params; 108 u32 imped_ratio; 109 }; 110 111 static int ahci_imx_hotplug; 112 module_param_named(hotplug, ahci_imx_hotplug, int, 0644); 113 MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)"); 114 115 static void ahci_imx_host_stop(struct ata_host *host); 116 117 static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert) 118 { 119 int timeout = 10; 120 u32 crval; 121 u32 srval; 122 123 /* Assert or deassert the bit */ 124 crval = readl(mmio + IMX_P0PHYCR); 125 if (assert) 126 crval |= bit; 127 else 128 crval &= ~bit; 129 writel(crval, mmio + IMX_P0PHYCR); 130 131 /* Wait for the cr_ack signal */ 132 do { 133 srval = readl(mmio + IMX_P0PHYSR); 134 if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK) 135 break; 136 usleep_range(100, 200); 137 } while (--timeout); 138 139 return timeout ? 0 : -ETIMEDOUT; 140 } 141 142 static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio) 143 { 144 u32 crval = addr; 145 int ret; 146 147 /* Supply the address on cr_data_in */ 148 writel(crval, mmio + IMX_P0PHYCR); 149 150 /* Assert the cr_cap_addr signal */ 151 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true); 152 if (ret) 153 return ret; 154 155 /* Deassert cr_cap_addr */ 156 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false); 157 if (ret) 158 return ret; 159 160 return 0; 161 } 162 163 static int imx_phy_reg_write(u16 val, void __iomem *mmio) 164 { 165 u32 crval = val; 166 int ret; 167 168 /* Supply the data on cr_data_in */ 169 writel(crval, mmio + IMX_P0PHYCR); 170 171 /* Assert the cr_cap_data signal */ 172 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true); 173 if (ret) 174 return ret; 175 176 /* Deassert cr_cap_data */ 177 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false); 178 if (ret) 179 return ret; 180 181 if (val & IMX_CLOCK_RESET_RESET) { 182 /* 183 * In case we're resetting the phy, it's unable to acknowledge, 184 * so we return immediately here. 185 */ 186 crval |= IMX_P0PHYCR_CR_WRITE; 187 writel(crval, mmio + IMX_P0PHYCR); 188 goto out; 189 } 190 191 /* Assert the cr_write signal */ 192 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true); 193 if (ret) 194 return ret; 195 196 /* Deassert cr_write */ 197 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false); 198 if (ret) 199 return ret; 200 201 out: 202 return 0; 203 } 204 205 static int imx_phy_reg_read(u16 *val, void __iomem *mmio) 206 { 207 int ret; 208 209 /* Assert the cr_read signal */ 210 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true); 211 if (ret) 212 return ret; 213 214 /* Capture the data from cr_data_out[] */ 215 *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT; 216 217 /* Deassert cr_read */ 218 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false); 219 if (ret) 220 return ret; 221 222 return 0; 223 } 224 225 static int imx_sata_phy_reset(struct ahci_host_priv *hpriv) 226 { 227 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 228 void __iomem *mmio = hpriv->mmio; 229 int timeout = 10; 230 u16 val; 231 int ret; 232 233 if (imxpriv->type == AHCI_IMX6QP) { 234 /* 6qp adds the sata reset mechanism, use it for 6qp sata */ 235 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 236 IMX6Q_GPR5_SATA_SW_PD, 0); 237 238 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 239 IMX6Q_GPR5_SATA_SW_RST, 0); 240 udelay(50); 241 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 242 IMX6Q_GPR5_SATA_SW_RST, 243 IMX6Q_GPR5_SATA_SW_RST); 244 return 0; 245 } 246 247 /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */ 248 ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio); 249 if (ret) 250 return ret; 251 ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio); 252 if (ret) 253 return ret; 254 255 /* Wait for PHY RX_PLL to be stable */ 256 do { 257 usleep_range(100, 200); 258 ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio); 259 if (ret) 260 return ret; 261 ret = imx_phy_reg_read(&val, mmio); 262 if (ret) 263 return ret; 264 if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE) 265 break; 266 } while (--timeout); 267 268 return timeout ? 0 : -ETIMEDOUT; 269 } 270 271 enum { 272 /* SATA PHY Register */ 273 SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT = 0x0001, 274 SATA_PHY_CR_CLOCK_DAC_CTL = 0x0008, 275 SATA_PHY_CR_CLOCK_RTUNE_CTL = 0x0009, 276 SATA_PHY_CR_CLOCK_ADC_OUT = 0x000A, 277 SATA_PHY_CR_CLOCK_MPLL_TST = 0x0017, 278 }; 279 280 static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio) 281 { 282 u16 adc_out_reg, read_sum; 283 u32 index, read_attempt; 284 const u32 attempt_limit = 200; 285 286 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); 287 imx_phy_reg_write(rtune_ctl_reg, mmio); 288 289 /* two dummy read */ 290 index = 0; 291 read_attempt = 0; 292 adc_out_reg = 0; 293 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_ADC_OUT, mmio); 294 while (index < 2) { 295 imx_phy_reg_read(&adc_out_reg, mmio); 296 /* check if valid */ 297 if (adc_out_reg & 0x400) 298 index++; 299 300 read_attempt++; 301 if (read_attempt > attempt_limit) { 302 dev_err(dev, "Read REG more than %d times!\n", 303 attempt_limit); 304 break; 305 } 306 } 307 308 index = 0; 309 read_attempt = 0; 310 read_sum = 0; 311 while (index < 80) { 312 imx_phy_reg_read(&adc_out_reg, mmio); 313 if (adc_out_reg & 0x400) { 314 read_sum = read_sum + (adc_out_reg & 0x3FF); 315 index++; 316 } 317 read_attempt++; 318 if (read_attempt > attempt_limit) { 319 dev_err(dev, "Read REG more than %d times!\n", 320 attempt_limit); 321 break; 322 } 323 } 324 325 /* Use the U32 to make 1000 precision */ 326 return (read_sum * 1000) / 80; 327 } 328 329 /* SATA AHCI temperature monitor */ 330 static int sata_ahci_read_temperature(void *dev, int *temp) 331 { 332 u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum; 333 u32 str1, str2, str3, str4; 334 int m1, m2, a; 335 struct ahci_host_priv *hpriv = dev_get_drvdata(dev); 336 void __iomem *mmio = hpriv->mmio; 337 338 /* check rd-wr to reg */ 339 read_sum = 0; 340 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT, mmio); 341 imx_phy_reg_write(read_sum, mmio); 342 imx_phy_reg_read(&read_sum, mmio); 343 if ((read_sum & 0xffff) != 0) 344 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); 345 346 imx_phy_reg_write(0x5A5A, mmio); 347 imx_phy_reg_read(&read_sum, mmio); 348 if ((read_sum & 0xffff) != 0x5A5A) 349 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); 350 351 imx_phy_reg_write(0x1234, mmio); 352 imx_phy_reg_read(&read_sum, mmio); 353 if ((read_sum & 0xffff) != 0x1234) 354 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); 355 356 /* start temperature test */ 357 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); 358 imx_phy_reg_read(&mpll_test_reg, mmio); 359 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); 360 imx_phy_reg_read(&rtune_ctl_reg, mmio); 361 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); 362 imx_phy_reg_read(&dac_ctl_reg, mmio); 363 364 /* mpll_tst.meas_iv ([12:2]) */ 365 str1 = (mpll_test_reg >> 2) & 0x7FF; 366 /* rtune_ctl.mode ([1:0]) */ 367 str2 = (rtune_ctl_reg) & 0x3; 368 /* dac_ctl.dac_mode ([14:12]) */ 369 str3 = (dac_ctl_reg >> 12) & 0x7; 370 /* rtune_ctl.sel_atbp ([4]) */ 371 str4 = (rtune_ctl_reg >> 4); 372 373 /* Calculate the m1 */ 374 /* mpll_tst.meas_iv */ 375 mpll_test_reg = (mpll_test_reg & 0xE03) | (512) << 2; 376 /* rtune_ctl.mode */ 377 rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (1); 378 /* dac_ctl.dac_mode */ 379 dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (4) << 12; 380 /* rtune_ctl.sel_atbp */ 381 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (0) << 4; 382 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); 383 imx_phy_reg_write(mpll_test_reg, mmio); 384 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); 385 imx_phy_reg_write(dac_ctl_reg, mmio); 386 m1 = read_adc_sum(dev, rtune_ctl_reg, mmio); 387 388 /* Calculate the m2 */ 389 /* rtune_ctl.sel_atbp */ 390 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (1) << 4; 391 m2 = read_adc_sum(dev, rtune_ctl_reg, mmio); 392 393 /* restore the status */ 394 /* mpll_tst.meas_iv */ 395 mpll_test_reg = (mpll_test_reg & 0xE03) | (str1) << 2; 396 /* rtune_ctl.mode */ 397 rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (str2); 398 /* dac_ctl.dac_mode */ 399 dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (str3) << 12; 400 /* rtune_ctl.sel_atbp */ 401 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (str4) << 4; 402 403 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); 404 imx_phy_reg_write(mpll_test_reg, mmio); 405 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); 406 imx_phy_reg_write(dac_ctl_reg, mmio); 407 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); 408 imx_phy_reg_write(rtune_ctl_reg, mmio); 409 410 /* Compute temperature */ 411 if (!(m2 / 1000)) 412 m2 = 1000; 413 a = (m2 - m1) / (m2/1000); 414 *temp = ((-559) * a * a) / 1000 + (1379) * a + (-458000); 415 416 return 0; 417 } 418 419 static ssize_t sata_ahci_show_temp(struct device *dev, 420 struct device_attribute *da, 421 char *buf) 422 { 423 unsigned int temp = 0; 424 int err; 425 426 err = sata_ahci_read_temperature(dev, &temp); 427 if (err < 0) 428 return err; 429 430 return sprintf(buf, "%u\n", temp); 431 } 432 433 static const struct thermal_zone_of_device_ops fsl_sata_ahci_of_thermal_ops = { 434 .get_temp = sata_ahci_read_temperature, 435 }; 436 437 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sata_ahci_show_temp, NULL, 0); 438 439 static struct attribute *fsl_sata_ahci_attrs[] = { 440 &sensor_dev_attr_temp1_input.dev_attr.attr, 441 NULL 442 }; 443 ATTRIBUTE_GROUPS(fsl_sata_ahci); 444 445 static int imx8_sata_enable(struct ahci_host_priv *hpriv) 446 { 447 u32 val, reg; 448 int i, ret; 449 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 450 struct device *dev = &imxpriv->ahci_pdev->dev; 451 452 /* configure the hsio for sata */ 453 ret = clk_prepare_enable(imxpriv->phy_pclk0); 454 if (ret < 0) { 455 dev_err(dev, "can't enable phy_pclk0.\n"); 456 return ret; 457 } 458 ret = clk_prepare_enable(imxpriv->phy_pclk1); 459 if (ret < 0) { 460 dev_err(dev, "can't enable phy_pclk1.\n"); 461 goto disable_phy_pclk0; 462 } 463 ret = clk_prepare_enable(imxpriv->epcs_tx_clk); 464 if (ret < 0) { 465 dev_err(dev, "can't enable epcs_tx_clk.\n"); 466 goto disable_phy_pclk1; 467 } 468 ret = clk_prepare_enable(imxpriv->epcs_rx_clk); 469 if (ret < 0) { 470 dev_err(dev, "can't enable epcs_rx_clk.\n"); 471 goto disable_epcs_tx_clk; 472 } 473 ret = clk_prepare_enable(imxpriv->phy_apbclk); 474 if (ret < 0) { 475 dev_err(dev, "can't enable phy_apbclk.\n"); 476 goto disable_epcs_rx_clk; 477 } 478 /* Configure PHYx2 PIPE_RSTN */ 479 regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEA_OFFSET + 480 IMX8QM_CSR_PCIE_CTRL2_OFFSET, &val); 481 if ((val & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { 482 /* The link of the PCIEA of HSIO is down */ 483 regmap_update_bits(imxpriv->gpr, 484 IMX8QM_CSR_PHYX2_OFFSET, 485 IMX8QM_PHY_PIPE_RSTN_0 | 486 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0, 487 IMX8QM_PHY_PIPE_RSTN_0 | 488 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0); 489 } 490 regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEB_OFFSET + 491 IMX8QM_CSR_PCIE_CTRL2_OFFSET, ®); 492 if ((reg & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { 493 /* The link of the PCIEB of HSIO is down */ 494 regmap_update_bits(imxpriv->gpr, 495 IMX8QM_CSR_PHYX2_OFFSET, 496 IMX8QM_PHY_PIPE_RSTN_1 | 497 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1, 498 IMX8QM_PHY_PIPE_RSTN_1 | 499 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1); 500 } 501 if (((reg | val) & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { 502 /* The links of both PCIA and PCIEB of HSIO are down */ 503 regmap_update_bits(imxpriv->gpr, 504 IMX8QM_LPCG_PHYX2_OFFSET, 505 IMX8QM_LPCG_PHYX2_PCLK0_MASK | 506 IMX8QM_LPCG_PHYX2_PCLK1_MASK, 507 0); 508 } 509 510 /* set PWR_RST and BT_RST of csr_pciea */ 511 val = IMX8QM_CSR_PCIEA_OFFSET + IMX8QM_CSR_PCIE_CTRL2_OFFSET; 512 regmap_update_bits(imxpriv->gpr, 513 val, 514 IMX8QM_CTRL_BUTTON_RST_N, 515 IMX8QM_CTRL_BUTTON_RST_N); 516 regmap_update_bits(imxpriv->gpr, 517 val, 518 IMX8QM_CTRL_POWER_UP_RST_N, 519 IMX8QM_CTRL_POWER_UP_RST_N); 520 521 /* PHYX1_MODE to SATA */ 522 regmap_update_bits(imxpriv->gpr, 523 IMX8QM_CSR_PHYX1_OFFSET, 524 IMX8QM_PHY_MODE_MASK, 525 IMX8QM_PHY_MODE_SATA); 526 527 /* 528 * BIT0 RXENA 1, BIT1 TXENA 0 529 * BIT12 PHY_X1_EPCS_SEL 1. 530 */ 531 regmap_update_bits(imxpriv->gpr, 532 IMX8QM_CSR_MISC_OFFSET, 533 IMX8QM_MISC_IOB_RXENA, 534 IMX8QM_MISC_IOB_RXENA); 535 regmap_update_bits(imxpriv->gpr, 536 IMX8QM_CSR_MISC_OFFSET, 537 IMX8QM_MISC_IOB_TXENA, 538 0); 539 regmap_update_bits(imxpriv->gpr, 540 IMX8QM_CSR_MISC_OFFSET, 541 IMX8QM_MISC_PHYX1_EPCS_SEL, 542 IMX8QM_MISC_PHYX1_EPCS_SEL); 543 /* 544 * It is possible, for PCIe and SATA are sharing 545 * the same clock source, HPLL or external oscillator. 546 * When PCIe is in low power modes (L1.X or L2 etc), 547 * the clock source can be turned off. In this case, 548 * if this clock source is required to be toggling by 549 * SATA, then SATA functions will be abnormal. 550 * Set the override here to avoid it. 551 */ 552 regmap_update_bits(imxpriv->gpr, 553 IMX8QM_CSR_MISC_OFFSET, 554 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 | 555 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 | 556 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 | 557 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0, 558 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 | 559 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 | 560 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 | 561 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0); 562 563 /* clear PHY RST, then set it */ 564 regmap_update_bits(imxpriv->gpr, 565 IMX8QM_CSR_SATA_OFFSET, 566 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N, 567 0); 568 569 regmap_update_bits(imxpriv->gpr, 570 IMX8QM_CSR_SATA_OFFSET, 571 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N, 572 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N); 573 574 /* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */ 575 regmap_update_bits(imxpriv->gpr, 576 IMX8QM_CSR_SATA_OFFSET, 577 IMX8QM_SATA_CTRL_RESET_N, 578 IMX8QM_SATA_CTRL_RESET_N); 579 udelay(1); 580 regmap_update_bits(imxpriv->gpr, 581 IMX8QM_CSR_SATA_OFFSET, 582 IMX8QM_SATA_CTRL_RESET_N, 583 0); 584 regmap_update_bits(imxpriv->gpr, 585 IMX8QM_CSR_SATA_OFFSET, 586 IMX8QM_SATA_CTRL_RESET_N, 587 IMX8QM_SATA_CTRL_RESET_N); 588 589 /* APB reset */ 590 regmap_update_bits(imxpriv->gpr, 591 IMX8QM_CSR_PHYX1_OFFSET, 592 IMX8QM_PHY_APB_RSTN_0, 593 IMX8QM_PHY_APB_RSTN_0); 594 595 for (i = 0; i < 100; i++) { 596 reg = IMX8QM_CSR_PHYX1_OFFSET + 597 IMX8QM_CSR_PHYX_STTS0_OFFSET; 598 regmap_read(imxpriv->gpr, reg, &val); 599 val &= IMX8QM_STTS0_LANE0_TX_PLL_LOCK; 600 if (val == IMX8QM_STTS0_LANE0_TX_PLL_LOCK) 601 break; 602 udelay(1); 603 } 604 605 if (val != IMX8QM_STTS0_LANE0_TX_PLL_LOCK) { 606 dev_err(dev, "TX PLL of the PHY is not locked\n"); 607 ret = -ENODEV; 608 } else { 609 writeb(imxpriv->imped_ratio, imxpriv->phy_base + 610 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET); 611 writeb(imxpriv->imped_ratio, imxpriv->phy_base + 612 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET); 613 reg = readb(imxpriv->phy_base + 614 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET); 615 if (unlikely(reg != imxpriv->imped_ratio)) 616 dev_info(dev, "Can't set PHY RX impedance ratio.\n"); 617 reg = readb(imxpriv->phy_base + 618 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET); 619 if (unlikely(reg != imxpriv->imped_ratio)) 620 dev_info(dev, "Can't set PHY TX impedance ratio.\n"); 621 usleep_range(50, 100); 622 623 /* 624 * To reduce the power consumption, gate off 625 * the PHY clks 626 */ 627 clk_disable_unprepare(imxpriv->phy_apbclk); 628 clk_disable_unprepare(imxpriv->phy_pclk1); 629 clk_disable_unprepare(imxpriv->phy_pclk0); 630 return ret; 631 } 632 633 clk_disable_unprepare(imxpriv->phy_apbclk); 634 disable_epcs_rx_clk: 635 clk_disable_unprepare(imxpriv->epcs_rx_clk); 636 disable_epcs_tx_clk: 637 clk_disable_unprepare(imxpriv->epcs_tx_clk); 638 disable_phy_pclk1: 639 clk_disable_unprepare(imxpriv->phy_pclk1); 640 disable_phy_pclk0: 641 clk_disable_unprepare(imxpriv->phy_pclk0); 642 643 return ret; 644 } 645 646 static int imx_sata_enable(struct ahci_host_priv *hpriv) 647 { 648 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 649 struct device *dev = &imxpriv->ahci_pdev->dev; 650 int ret; 651 652 if (imxpriv->no_device) 653 return 0; 654 655 ret = ahci_platform_enable_regulators(hpriv); 656 if (ret) 657 return ret; 658 659 ret = clk_prepare_enable(imxpriv->sata_ref_clk); 660 if (ret < 0) 661 goto disable_regulator; 662 663 if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { 664 /* 665 * set PHY Paremeters, two steps to configure the GPR13, 666 * one write for rest of parameters, mask of first write 667 * is 0x07ffffff, and the other one write for setting 668 * the mpll_clk_en. 669 */ 670 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 671 IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK | 672 IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK | 673 IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK | 674 IMX6Q_GPR13_SATA_SPD_MODE_MASK | 675 IMX6Q_GPR13_SATA_MPLL_SS_EN | 676 IMX6Q_GPR13_SATA_TX_ATTEN_MASK | 677 IMX6Q_GPR13_SATA_TX_BOOST_MASK | 678 IMX6Q_GPR13_SATA_TX_LVL_MASK | 679 IMX6Q_GPR13_SATA_MPLL_CLK_EN | 680 IMX6Q_GPR13_SATA_TX_EDGE_RATE, 681 imxpriv->phy_params); 682 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 683 IMX6Q_GPR13_SATA_MPLL_CLK_EN, 684 IMX6Q_GPR13_SATA_MPLL_CLK_EN); 685 686 usleep_range(100, 200); 687 688 ret = imx_sata_phy_reset(hpriv); 689 if (ret) { 690 dev_err(dev, "failed to reset phy: %d\n", ret); 691 goto disable_clk; 692 } 693 } else if (imxpriv->type == AHCI_IMX8QM) { 694 ret = imx8_sata_enable(hpriv); 695 } 696 697 usleep_range(1000, 2000); 698 699 return 0; 700 701 disable_clk: 702 clk_disable_unprepare(imxpriv->sata_ref_clk); 703 disable_regulator: 704 ahci_platform_disable_regulators(hpriv); 705 706 return ret; 707 } 708 709 static void imx_sata_disable(struct ahci_host_priv *hpriv) 710 { 711 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 712 713 if (imxpriv->no_device) 714 return; 715 716 switch (imxpriv->type) { 717 case AHCI_IMX6QP: 718 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 719 IMX6Q_GPR5_SATA_SW_PD, 720 IMX6Q_GPR5_SATA_SW_PD); 721 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 722 IMX6Q_GPR13_SATA_MPLL_CLK_EN, 723 !IMX6Q_GPR13_SATA_MPLL_CLK_EN); 724 break; 725 726 case AHCI_IMX6Q: 727 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 728 IMX6Q_GPR13_SATA_MPLL_CLK_EN, 729 !IMX6Q_GPR13_SATA_MPLL_CLK_EN); 730 break; 731 732 case AHCI_IMX8QM: 733 clk_disable_unprepare(imxpriv->epcs_rx_clk); 734 clk_disable_unprepare(imxpriv->epcs_tx_clk); 735 break; 736 737 default: 738 break; 739 } 740 741 clk_disable_unprepare(imxpriv->sata_ref_clk); 742 743 ahci_platform_disable_regulators(hpriv); 744 } 745 746 static void ahci_imx_error_handler(struct ata_port *ap) 747 { 748 u32 reg_val; 749 struct ata_device *dev; 750 struct ata_host *host = dev_get_drvdata(ap->dev); 751 struct ahci_host_priv *hpriv = host->private_data; 752 void __iomem *mmio = hpriv->mmio; 753 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 754 755 ahci_error_handler(ap); 756 757 if (!(imxpriv->first_time) || ahci_imx_hotplug) 758 return; 759 760 imxpriv->first_time = false; 761 762 ata_for_each_dev(dev, &ap->link, ENABLED) 763 return; 764 /* 765 * Disable link to save power. An imx ahci port can't be recovered 766 * without full reset once the pddq mode is enabled making it 767 * impossible to use as part of libata LPM. 768 */ 769 reg_val = readl(mmio + IMX_P0PHYCR); 770 writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR); 771 imx_sata_disable(hpriv); 772 imxpriv->no_device = true; 773 774 dev_info(ap->dev, "no device found, disabling link.\n"); 775 dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n"); 776 } 777 778 static int ahci_imx_softreset(struct ata_link *link, unsigned int *class, 779 unsigned long deadline) 780 { 781 struct ata_port *ap = link->ap; 782 struct ata_host *host = dev_get_drvdata(ap->dev); 783 struct ahci_host_priv *hpriv = host->private_data; 784 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 785 int ret; 786 787 if (imxpriv->type == AHCI_IMX53) 788 ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline); 789 else 790 ret = ahci_ops.softreset(link, class, deadline); 791 792 return ret; 793 } 794 795 static struct ata_port_operations ahci_imx_ops = { 796 .inherits = &ahci_ops, 797 .host_stop = ahci_imx_host_stop, 798 .error_handler = ahci_imx_error_handler, 799 .softreset = ahci_imx_softreset, 800 }; 801 802 static const struct ata_port_info ahci_imx_port_info = { 803 .flags = AHCI_FLAG_COMMON, 804 .pio_mask = ATA_PIO4, 805 .udma_mask = ATA_UDMA6, 806 .port_ops = &ahci_imx_ops, 807 }; 808 809 static const struct of_device_id imx_ahci_of_match[] = { 810 { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 }, 811 { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q }, 812 { .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP }, 813 { .compatible = "fsl,imx8qm-ahci", .data = (void *)AHCI_IMX8QM }, 814 {}, 815 }; 816 MODULE_DEVICE_TABLE(of, imx_ahci_of_match); 817 818 struct reg_value { 819 u32 of_value; 820 u32 reg_value; 821 }; 822 823 struct reg_property { 824 const char *name; 825 const struct reg_value *values; 826 size_t num_values; 827 u32 def_value; 828 u32 set_value; 829 }; 830 831 static const struct reg_value gpr13_tx_level[] = { 832 { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V }, 833 { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V }, 834 { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V }, 835 { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V }, 836 { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V }, 837 { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V }, 838 { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V }, 839 { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V }, 840 { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V }, 841 { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V }, 842 { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V }, 843 { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V }, 844 { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V }, 845 { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V }, 846 { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V }, 847 { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V }, 848 { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V }, 849 { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V }, 850 { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V }, 851 { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V }, 852 { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V }, 853 { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V }, 854 { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V }, 855 { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V }, 856 { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V }, 857 { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V }, 858 { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V }, 859 { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V }, 860 { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V }, 861 { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V }, 862 { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V }, 863 { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V } 864 }; 865 866 static const struct reg_value gpr13_tx_boost[] = { 867 { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB }, 868 { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB }, 869 { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB }, 870 { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB }, 871 { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB }, 872 { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB }, 873 { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB }, 874 { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB }, 875 { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB }, 876 { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB }, 877 { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB }, 878 { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB }, 879 { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB }, 880 { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB }, 881 { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB }, 882 { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB } 883 }; 884 885 static const struct reg_value gpr13_tx_atten[] = { 886 { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 }, 887 { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 }, 888 { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 }, 889 { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 }, 890 { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 }, 891 { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 }, 892 }; 893 894 static const struct reg_value gpr13_rx_eq[] = { 895 { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB }, 896 { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB }, 897 { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB }, 898 { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB }, 899 { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB }, 900 { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB }, 901 { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB }, 902 { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB }, 903 }; 904 905 static const struct reg_property gpr13_props[] = { 906 { 907 .name = "fsl,transmit-level-mV", 908 .values = gpr13_tx_level, 909 .num_values = ARRAY_SIZE(gpr13_tx_level), 910 .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V, 911 }, { 912 .name = "fsl,transmit-boost-mdB", 913 .values = gpr13_tx_boost, 914 .num_values = ARRAY_SIZE(gpr13_tx_boost), 915 .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB, 916 }, { 917 .name = "fsl,transmit-atten-16ths", 918 .values = gpr13_tx_atten, 919 .num_values = ARRAY_SIZE(gpr13_tx_atten), 920 .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16, 921 }, { 922 .name = "fsl,receive-eq-mdB", 923 .values = gpr13_rx_eq, 924 .num_values = ARRAY_SIZE(gpr13_rx_eq), 925 .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB, 926 }, { 927 .name = "fsl,no-spread-spectrum", 928 .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN, 929 .set_value = 0, 930 }, 931 }; 932 933 static u32 imx_ahci_parse_props(struct device *dev, 934 const struct reg_property *prop, size_t num) 935 { 936 struct device_node *np = dev->of_node; 937 u32 reg_value = 0; 938 int i, j; 939 940 for (i = 0; i < num; i++, prop++) { 941 u32 of_val; 942 943 if (prop->num_values == 0) { 944 if (of_property_read_bool(np, prop->name)) 945 reg_value |= prop->set_value; 946 else 947 reg_value |= prop->def_value; 948 continue; 949 } 950 951 if (of_property_read_u32(np, prop->name, &of_val)) { 952 dev_info(dev, "%s not specified, using %08x\n", 953 prop->name, prop->def_value); 954 reg_value |= prop->def_value; 955 continue; 956 } 957 958 for (j = 0; j < prop->num_values; j++) { 959 if (prop->values[j].of_value == of_val) { 960 dev_info(dev, "%s value %u, using %08x\n", 961 prop->name, of_val, prop->values[j].reg_value); 962 reg_value |= prop->values[j].reg_value; 963 break; 964 } 965 } 966 967 if (j == prop->num_values) { 968 dev_err(dev, "DT property %s is not a valid value\n", 969 prop->name); 970 reg_value |= prop->def_value; 971 } 972 } 973 974 return reg_value; 975 } 976 977 static struct scsi_host_template ahci_platform_sht = { 978 AHCI_SHT(DRV_NAME), 979 }; 980 981 static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv) 982 { 983 struct resource *phy_res; 984 struct platform_device *pdev = imxpriv->ahci_pdev; 985 struct device_node *np = dev->of_node; 986 987 if (of_property_read_u32(np, "fsl,phy-imp", &imxpriv->imped_ratio)) 988 imxpriv->imped_ratio = IMX8QM_SATA_PHY_IMPED_RATIO_85OHM; 989 phy_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy"); 990 if (phy_res) { 991 imxpriv->phy_base = devm_ioremap(dev, phy_res->start, 992 resource_size(phy_res)); 993 if (!imxpriv->phy_base) { 994 dev_err(dev, "error with ioremap\n"); 995 return -ENOMEM; 996 } 997 } else { 998 dev_err(dev, "missing *phy* reg region.\n"); 999 return -ENOMEM; 1000 } 1001 imxpriv->gpr = 1002 syscon_regmap_lookup_by_phandle(np, "hsio"); 1003 if (IS_ERR(imxpriv->gpr)) { 1004 dev_err(dev, "unable to find gpr registers\n"); 1005 return PTR_ERR(imxpriv->gpr); 1006 } 1007 1008 imxpriv->epcs_tx_clk = devm_clk_get(dev, "epcs_tx"); 1009 if (IS_ERR(imxpriv->epcs_tx_clk)) { 1010 dev_err(dev, "can't get epcs_tx_clk clock.\n"); 1011 return PTR_ERR(imxpriv->epcs_tx_clk); 1012 } 1013 imxpriv->epcs_rx_clk = devm_clk_get(dev, "epcs_rx"); 1014 if (IS_ERR(imxpriv->epcs_rx_clk)) { 1015 dev_err(dev, "can't get epcs_rx_clk clock.\n"); 1016 return PTR_ERR(imxpriv->epcs_rx_clk); 1017 } 1018 imxpriv->phy_pclk0 = devm_clk_get(dev, "phy_pclk0"); 1019 if (IS_ERR(imxpriv->phy_pclk0)) { 1020 dev_err(dev, "can't get phy_pclk0 clock.\n"); 1021 return PTR_ERR(imxpriv->phy_pclk0); 1022 } 1023 imxpriv->phy_pclk1 = devm_clk_get(dev, "phy_pclk1"); 1024 if (IS_ERR(imxpriv->phy_pclk1)) { 1025 dev_err(dev, "can't get phy_pclk1 clock.\n"); 1026 return PTR_ERR(imxpriv->phy_pclk1); 1027 } 1028 imxpriv->phy_apbclk = devm_clk_get(dev, "phy_apbclk"); 1029 if (IS_ERR(imxpriv->phy_apbclk)) { 1030 dev_err(dev, "can't get phy_apbclk clock.\n"); 1031 return PTR_ERR(imxpriv->phy_apbclk); 1032 } 1033 1034 /* Fetch GPIO, then enable the external OSC */ 1035 imxpriv->clkreq_gpiod = devm_gpiod_get_optional(dev, "clkreq", 1036 GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); 1037 if (IS_ERR(imxpriv->clkreq_gpiod)) 1038 return PTR_ERR(imxpriv->clkreq_gpiod); 1039 if (imxpriv->clkreq_gpiod) 1040 gpiod_set_consumer_name(imxpriv->clkreq_gpiod, "SATA CLKREQ"); 1041 1042 return 0; 1043 } 1044 1045 static int imx_ahci_probe(struct platform_device *pdev) 1046 { 1047 struct device *dev = &pdev->dev; 1048 const struct of_device_id *of_id; 1049 struct ahci_host_priv *hpriv; 1050 struct imx_ahci_priv *imxpriv; 1051 unsigned int reg_val; 1052 int ret; 1053 1054 of_id = of_match_device(imx_ahci_of_match, dev); 1055 if (!of_id) 1056 return -EINVAL; 1057 1058 imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL); 1059 if (!imxpriv) 1060 return -ENOMEM; 1061 1062 imxpriv->ahci_pdev = pdev; 1063 imxpriv->no_device = false; 1064 imxpriv->first_time = true; 1065 imxpriv->type = (enum ahci_imx_type)of_id->data; 1066 1067 imxpriv->sata_clk = devm_clk_get(dev, "sata"); 1068 if (IS_ERR(imxpriv->sata_clk)) { 1069 dev_err(dev, "can't get sata clock.\n"); 1070 return PTR_ERR(imxpriv->sata_clk); 1071 } 1072 1073 imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref"); 1074 if (IS_ERR(imxpriv->sata_ref_clk)) { 1075 dev_err(dev, "can't get sata_ref clock.\n"); 1076 return PTR_ERR(imxpriv->sata_ref_clk); 1077 } 1078 1079 imxpriv->ahb_clk = devm_clk_get(dev, "ahb"); 1080 if (IS_ERR(imxpriv->ahb_clk)) { 1081 dev_err(dev, "can't get ahb clock.\n"); 1082 return PTR_ERR(imxpriv->ahb_clk); 1083 } 1084 1085 if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { 1086 u32 reg_value; 1087 1088 imxpriv->gpr = syscon_regmap_lookup_by_compatible( 1089 "fsl,imx6q-iomuxc-gpr"); 1090 if (IS_ERR(imxpriv->gpr)) { 1091 dev_err(dev, 1092 "failed to find fsl,imx6q-iomux-gpr regmap\n"); 1093 return PTR_ERR(imxpriv->gpr); 1094 } 1095 1096 reg_value = imx_ahci_parse_props(dev, gpr13_props, 1097 ARRAY_SIZE(gpr13_props)); 1098 1099 imxpriv->phy_params = 1100 IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | 1101 IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | 1102 IMX6Q_GPR13_SATA_SPD_MODE_3P0G | 1103 reg_value; 1104 } else if (imxpriv->type == AHCI_IMX8QM) { 1105 ret = imx8_sata_probe(dev, imxpriv); 1106 if (ret) 1107 return ret; 1108 } 1109 1110 hpriv = ahci_platform_get_resources(pdev, 0); 1111 if (IS_ERR(hpriv)) 1112 return PTR_ERR(hpriv); 1113 1114 hpriv->plat_data = imxpriv; 1115 1116 ret = clk_prepare_enable(imxpriv->sata_clk); 1117 if (ret) 1118 return ret; 1119 1120 if (imxpriv->type == AHCI_IMX53 && 1121 IS_ENABLED(CONFIG_HWMON)) { 1122 /* Add the temperature monitor */ 1123 struct device *hwmon_dev; 1124 1125 hwmon_dev = 1126 devm_hwmon_device_register_with_groups(dev, 1127 "sata_ahci", 1128 hpriv, 1129 fsl_sata_ahci_groups); 1130 if (IS_ERR(hwmon_dev)) { 1131 ret = PTR_ERR(hwmon_dev); 1132 goto disable_clk; 1133 } 1134 devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev, 1135 &fsl_sata_ahci_of_thermal_ops); 1136 dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev)); 1137 } 1138 1139 ret = imx_sata_enable(hpriv); 1140 if (ret) 1141 goto disable_clk; 1142 1143 /* 1144 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL, 1145 * and IP vendor specific register IMX_TIMER1MS. 1146 * Configure CAP_SSS (support stagered spin up). 1147 * Implement the port0. 1148 * Get the ahb clock rate, and configure the TIMER1MS register. 1149 */ 1150 reg_val = readl(hpriv->mmio + HOST_CAP); 1151 if (!(reg_val & HOST_CAP_SSS)) { 1152 reg_val |= HOST_CAP_SSS; 1153 writel(reg_val, hpriv->mmio + HOST_CAP); 1154 } 1155 reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL); 1156 if (!(reg_val & 0x1)) { 1157 reg_val |= 0x1; 1158 writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL); 1159 } 1160 1161 reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000; 1162 writel(reg_val, hpriv->mmio + IMX_TIMER1MS); 1163 1164 ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, 1165 &ahci_platform_sht); 1166 if (ret) 1167 goto disable_sata; 1168 1169 return 0; 1170 1171 disable_sata: 1172 imx_sata_disable(hpriv); 1173 disable_clk: 1174 clk_disable_unprepare(imxpriv->sata_clk); 1175 return ret; 1176 } 1177 1178 static void ahci_imx_host_stop(struct ata_host *host) 1179 { 1180 struct ahci_host_priv *hpriv = host->private_data; 1181 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 1182 1183 imx_sata_disable(hpriv); 1184 clk_disable_unprepare(imxpriv->sata_clk); 1185 } 1186 1187 #ifdef CONFIG_PM_SLEEP 1188 static int imx_ahci_suspend(struct device *dev) 1189 { 1190 struct ata_host *host = dev_get_drvdata(dev); 1191 struct ahci_host_priv *hpriv = host->private_data; 1192 int ret; 1193 1194 ret = ahci_platform_suspend_host(dev); 1195 if (ret) 1196 return ret; 1197 1198 imx_sata_disable(hpriv); 1199 1200 return 0; 1201 } 1202 1203 static int imx_ahci_resume(struct device *dev) 1204 { 1205 struct ata_host *host = dev_get_drvdata(dev); 1206 struct ahci_host_priv *hpriv = host->private_data; 1207 int ret; 1208 1209 ret = imx_sata_enable(hpriv); 1210 if (ret) 1211 return ret; 1212 1213 return ahci_platform_resume_host(dev); 1214 } 1215 #endif 1216 1217 static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume); 1218 1219 static struct platform_driver imx_ahci_driver = { 1220 .probe = imx_ahci_probe, 1221 .remove = ata_platform_remove_one, 1222 .driver = { 1223 .name = DRV_NAME, 1224 .of_match_table = imx_ahci_of_match, 1225 .pm = &ahci_imx_pm_ops, 1226 }, 1227 }; 1228 module_platform_driver(imx_ahci_driver); 1229 1230 MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver"); 1231 MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>"); 1232 MODULE_LICENSE("GPL"); 1233 MODULE_ALIAS("ahci:imx"); 1234