1 /* 2 * copyright (c) 2013 Freescale Semiconductor, Inc. 3 * Freescale IMX AHCI SATA platform driver 4 * 5 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2, as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/platform_device.h> 23 #include <linux/regmap.h> 24 #include <linux/ahci_platform.h> 25 #include <linux/of_device.h> 26 #include <linux/of_gpio.h> 27 #include <linux/mfd/syscon.h> 28 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> 29 #include <linux/libata.h> 30 #include <linux/hwmon.h> 31 #include <linux/hwmon-sysfs.h> 32 #include <linux/thermal.h> 33 #include "ahci.h" 34 35 #define DRV_NAME "ahci-imx" 36 37 enum { 38 /* Timer 1-ms Register */ 39 IMX_TIMER1MS = 0x00e0, 40 /* Port0 PHY Control Register */ 41 IMX_P0PHYCR = 0x0178, 42 IMX_P0PHYCR_TEST_PDDQ = 1 << 20, 43 IMX_P0PHYCR_CR_READ = 1 << 19, 44 IMX_P0PHYCR_CR_WRITE = 1 << 18, 45 IMX_P0PHYCR_CR_CAP_DATA = 1 << 17, 46 IMX_P0PHYCR_CR_CAP_ADDR = 1 << 16, 47 /* Port0 PHY Status Register */ 48 IMX_P0PHYSR = 0x017c, 49 IMX_P0PHYSR_CR_ACK = 1 << 18, 50 IMX_P0PHYSR_CR_DATA_OUT = 0xffff << 0, 51 /* Lane0 Output Status Register */ 52 IMX_LANE0_OUT_STAT = 0x2003, 53 IMX_LANE0_OUT_STAT_RX_PLL_STATE = 1 << 1, 54 /* Clock Reset Register */ 55 IMX_CLOCK_RESET = 0x7f3f, 56 IMX_CLOCK_RESET_RESET = 1 << 0, 57 /* IMX8QM HSIO AHCI definitions */ 58 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET = 0x03, 59 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET = 0x09, 60 IMX8QM_SATA_PHY_IMPED_RATIO_85OHM = 0x6c, 61 IMX8QM_LPCG_PHYX2_OFFSET = 0x00000, 62 IMX8QM_CSR_PHYX2_OFFSET = 0x90000, 63 IMX8QM_CSR_PHYX1_OFFSET = 0xa0000, 64 IMX8QM_CSR_PHYX_STTS0_OFFSET = 0x4, 65 IMX8QM_CSR_PCIEA_OFFSET = 0xb0000, 66 IMX8QM_CSR_PCIEB_OFFSET = 0xc0000, 67 IMX8QM_CSR_SATA_OFFSET = 0xd0000, 68 IMX8QM_CSR_PCIE_CTRL2_OFFSET = 0x8, 69 IMX8QM_CSR_MISC_OFFSET = 0xe0000, 70 71 IMX8QM_LPCG_PHYX2_PCLK0_MASK = (0x3 << 16), 72 IMX8QM_LPCG_PHYX2_PCLK1_MASK = (0x3 << 20), 73 IMX8QM_PHY_APB_RSTN_0 = BIT(0), 74 IMX8QM_PHY_MODE_SATA = BIT(19), 75 IMX8QM_PHY_MODE_MASK = (0xf << 17), 76 IMX8QM_PHY_PIPE_RSTN_0 = BIT(24), 77 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0 = BIT(25), 78 IMX8QM_PHY_PIPE_RSTN_1 = BIT(26), 79 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1 = BIT(27), 80 IMX8QM_STTS0_LANE0_TX_PLL_LOCK = BIT(4), 81 IMX8QM_MISC_IOB_RXENA = BIT(0), 82 IMX8QM_MISC_IOB_TXENA = BIT(1), 83 IMX8QM_MISC_PHYX1_EPCS_SEL = BIT(12), 84 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 = BIT(24), 85 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 = BIT(25), 86 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 = BIT(28), 87 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0 = BIT(29), 88 IMX8QM_SATA_CTRL_RESET_N = BIT(12), 89 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N = BIT(7), 90 IMX8QM_CTRL_BUTTON_RST_N = BIT(21), 91 IMX8QM_CTRL_POWER_UP_RST_N = BIT(23), 92 IMX8QM_CTRL_LTSSM_ENABLE = BIT(4), 93 }; 94 95 enum ahci_imx_type { 96 AHCI_IMX53, 97 AHCI_IMX6Q, 98 AHCI_IMX6QP, 99 AHCI_IMX8QM, 100 }; 101 102 struct imx_ahci_priv { 103 struct platform_device *ahci_pdev; 104 enum ahci_imx_type type; 105 struct clk *sata_clk; 106 struct clk *sata_ref_clk; 107 struct clk *ahb_clk; 108 struct clk *epcs_tx_clk; 109 struct clk *epcs_rx_clk; 110 struct clk *phy_apbclk; 111 struct clk *phy_pclk0; 112 struct clk *phy_pclk1; 113 void __iomem *phy_base; 114 int clkreq_gpio; 115 struct regmap *gpr; 116 bool no_device; 117 bool first_time; 118 u32 phy_params; 119 u32 imped_ratio; 120 }; 121 122 static int ahci_imx_hotplug; 123 module_param_named(hotplug, ahci_imx_hotplug, int, 0644); 124 MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)"); 125 126 static void ahci_imx_host_stop(struct ata_host *host); 127 128 static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert) 129 { 130 int timeout = 10; 131 u32 crval; 132 u32 srval; 133 134 /* Assert or deassert the bit */ 135 crval = readl(mmio + IMX_P0PHYCR); 136 if (assert) 137 crval |= bit; 138 else 139 crval &= ~bit; 140 writel(crval, mmio + IMX_P0PHYCR); 141 142 /* Wait for the cr_ack signal */ 143 do { 144 srval = readl(mmio + IMX_P0PHYSR); 145 if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK) 146 break; 147 usleep_range(100, 200); 148 } while (--timeout); 149 150 return timeout ? 0 : -ETIMEDOUT; 151 } 152 153 static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio) 154 { 155 u32 crval = addr; 156 int ret; 157 158 /* Supply the address on cr_data_in */ 159 writel(crval, mmio + IMX_P0PHYCR); 160 161 /* Assert the cr_cap_addr signal */ 162 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true); 163 if (ret) 164 return ret; 165 166 /* Deassert cr_cap_addr */ 167 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false); 168 if (ret) 169 return ret; 170 171 return 0; 172 } 173 174 static int imx_phy_reg_write(u16 val, void __iomem *mmio) 175 { 176 u32 crval = val; 177 int ret; 178 179 /* Supply the data on cr_data_in */ 180 writel(crval, mmio + IMX_P0PHYCR); 181 182 /* Assert the cr_cap_data signal */ 183 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true); 184 if (ret) 185 return ret; 186 187 /* Deassert cr_cap_data */ 188 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false); 189 if (ret) 190 return ret; 191 192 if (val & IMX_CLOCK_RESET_RESET) { 193 /* 194 * In case we're resetting the phy, it's unable to acknowledge, 195 * so we return immediately here. 196 */ 197 crval |= IMX_P0PHYCR_CR_WRITE; 198 writel(crval, mmio + IMX_P0PHYCR); 199 goto out; 200 } 201 202 /* Assert the cr_write signal */ 203 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true); 204 if (ret) 205 return ret; 206 207 /* Deassert cr_write */ 208 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false); 209 if (ret) 210 return ret; 211 212 out: 213 return 0; 214 } 215 216 static int imx_phy_reg_read(u16 *val, void __iomem *mmio) 217 { 218 int ret; 219 220 /* Assert the cr_read signal */ 221 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true); 222 if (ret) 223 return ret; 224 225 /* Capture the data from cr_data_out[] */ 226 *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT; 227 228 /* Deassert cr_read */ 229 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false); 230 if (ret) 231 return ret; 232 233 return 0; 234 } 235 236 static int imx_sata_phy_reset(struct ahci_host_priv *hpriv) 237 { 238 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 239 void __iomem *mmio = hpriv->mmio; 240 int timeout = 10; 241 u16 val; 242 int ret; 243 244 if (imxpriv->type == AHCI_IMX6QP) { 245 /* 6qp adds the sata reset mechanism, use it for 6qp sata */ 246 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 247 IMX6Q_GPR5_SATA_SW_PD, 0); 248 249 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 250 IMX6Q_GPR5_SATA_SW_RST, 0); 251 udelay(50); 252 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 253 IMX6Q_GPR5_SATA_SW_RST, 254 IMX6Q_GPR5_SATA_SW_RST); 255 return 0; 256 } 257 258 /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */ 259 ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio); 260 if (ret) 261 return ret; 262 ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio); 263 if (ret) 264 return ret; 265 266 /* Wait for PHY RX_PLL to be stable */ 267 do { 268 usleep_range(100, 200); 269 ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio); 270 if (ret) 271 return ret; 272 ret = imx_phy_reg_read(&val, mmio); 273 if (ret) 274 return ret; 275 if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE) 276 break; 277 } while (--timeout); 278 279 return timeout ? 0 : -ETIMEDOUT; 280 } 281 282 enum { 283 /* SATA PHY Register */ 284 SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT = 0x0001, 285 SATA_PHY_CR_CLOCK_DAC_CTL = 0x0008, 286 SATA_PHY_CR_CLOCK_RTUNE_CTL = 0x0009, 287 SATA_PHY_CR_CLOCK_ADC_OUT = 0x000A, 288 SATA_PHY_CR_CLOCK_MPLL_TST = 0x0017, 289 }; 290 291 static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio) 292 { 293 u16 adc_out_reg, read_sum; 294 u32 index, read_attempt; 295 const u32 attempt_limit = 200; 296 297 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); 298 imx_phy_reg_write(rtune_ctl_reg, mmio); 299 300 /* two dummy read */ 301 index = 0; 302 read_attempt = 0; 303 adc_out_reg = 0; 304 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_ADC_OUT, mmio); 305 while (index < 2) { 306 imx_phy_reg_read(&adc_out_reg, mmio); 307 /* check if valid */ 308 if (adc_out_reg & 0x400) 309 index++; 310 311 read_attempt++; 312 if (read_attempt > attempt_limit) { 313 dev_err(dev, "Read REG more than %d times!\n", 314 attempt_limit); 315 break; 316 } 317 } 318 319 index = 0; 320 read_attempt = 0; 321 read_sum = 0; 322 while (index < 80) { 323 imx_phy_reg_read(&adc_out_reg, mmio); 324 if (adc_out_reg & 0x400) { 325 read_sum = read_sum + (adc_out_reg & 0x3FF); 326 index++; 327 } 328 read_attempt++; 329 if (read_attempt > attempt_limit) { 330 dev_err(dev, "Read REG more than %d times!\n", 331 attempt_limit); 332 break; 333 } 334 } 335 336 /* Use the U32 to make 1000 precision */ 337 return (read_sum * 1000) / 80; 338 } 339 340 /* SATA AHCI temperature monitor */ 341 static int sata_ahci_read_temperature(void *dev, int *temp) 342 { 343 u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum; 344 u32 str1, str2, str3, str4; 345 int m1, m2, a; 346 struct ahci_host_priv *hpriv = dev_get_drvdata(dev); 347 void __iomem *mmio = hpriv->mmio; 348 349 /* check rd-wr to reg */ 350 read_sum = 0; 351 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT, mmio); 352 imx_phy_reg_write(read_sum, mmio); 353 imx_phy_reg_read(&read_sum, mmio); 354 if ((read_sum & 0xffff) != 0) 355 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); 356 357 imx_phy_reg_write(0x5A5A, mmio); 358 imx_phy_reg_read(&read_sum, mmio); 359 if ((read_sum & 0xffff) != 0x5A5A) 360 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); 361 362 imx_phy_reg_write(0x1234, mmio); 363 imx_phy_reg_read(&read_sum, mmio); 364 if ((read_sum & 0xffff) != 0x1234) 365 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); 366 367 /* start temperature test */ 368 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); 369 imx_phy_reg_read(&mpll_test_reg, mmio); 370 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); 371 imx_phy_reg_read(&rtune_ctl_reg, mmio); 372 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); 373 imx_phy_reg_read(&dac_ctl_reg, mmio); 374 375 /* mpll_tst.meas_iv ([12:2]) */ 376 str1 = (mpll_test_reg >> 2) & 0x7FF; 377 /* rtune_ctl.mode ([1:0]) */ 378 str2 = (rtune_ctl_reg) & 0x3; 379 /* dac_ctl.dac_mode ([14:12]) */ 380 str3 = (dac_ctl_reg >> 12) & 0x7; 381 /* rtune_ctl.sel_atbp ([4]) */ 382 str4 = (rtune_ctl_reg >> 4); 383 384 /* Calculate the m1 */ 385 /* mpll_tst.meas_iv */ 386 mpll_test_reg = (mpll_test_reg & 0xE03) | (512) << 2; 387 /* rtune_ctl.mode */ 388 rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (1); 389 /* dac_ctl.dac_mode */ 390 dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (4) << 12; 391 /* rtune_ctl.sel_atbp */ 392 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (0) << 4; 393 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); 394 imx_phy_reg_write(mpll_test_reg, mmio); 395 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); 396 imx_phy_reg_write(dac_ctl_reg, mmio); 397 m1 = read_adc_sum(dev, rtune_ctl_reg, mmio); 398 399 /* Calculate the m2 */ 400 /* rtune_ctl.sel_atbp */ 401 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (1) << 4; 402 m2 = read_adc_sum(dev, rtune_ctl_reg, mmio); 403 404 /* restore the status */ 405 /* mpll_tst.meas_iv */ 406 mpll_test_reg = (mpll_test_reg & 0xE03) | (str1) << 2; 407 /* rtune_ctl.mode */ 408 rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (str2); 409 /* dac_ctl.dac_mode */ 410 dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (str3) << 12; 411 /* rtune_ctl.sel_atbp */ 412 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (str4) << 4; 413 414 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); 415 imx_phy_reg_write(mpll_test_reg, mmio); 416 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); 417 imx_phy_reg_write(dac_ctl_reg, mmio); 418 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); 419 imx_phy_reg_write(rtune_ctl_reg, mmio); 420 421 /* Compute temperature */ 422 if (!(m2 / 1000)) 423 m2 = 1000; 424 a = (m2 - m1) / (m2/1000); 425 *temp = ((-559) * a * a) / 1000 + (1379) * a + (-458000); 426 427 return 0; 428 } 429 430 static ssize_t sata_ahci_show_temp(struct device *dev, 431 struct device_attribute *da, 432 char *buf) 433 { 434 unsigned int temp = 0; 435 int err; 436 437 err = sata_ahci_read_temperature(dev, &temp); 438 if (err < 0) 439 return err; 440 441 return sprintf(buf, "%u\n", temp); 442 } 443 444 static const struct thermal_zone_of_device_ops fsl_sata_ahci_of_thermal_ops = { 445 .get_temp = sata_ahci_read_temperature, 446 }; 447 448 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sata_ahci_show_temp, NULL, 0); 449 450 static struct attribute *fsl_sata_ahci_attrs[] = { 451 &sensor_dev_attr_temp1_input.dev_attr.attr, 452 NULL 453 }; 454 ATTRIBUTE_GROUPS(fsl_sata_ahci); 455 456 static int imx8_sata_enable(struct ahci_host_priv *hpriv) 457 { 458 u32 val, reg; 459 int i, ret; 460 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 461 struct device *dev = &imxpriv->ahci_pdev->dev; 462 463 /* configure the hsio for sata */ 464 ret = clk_prepare_enable(imxpriv->phy_pclk0); 465 if (ret < 0) { 466 dev_err(dev, "can't enable phy_pclk0.\n"); 467 return ret; 468 } 469 ret = clk_prepare_enable(imxpriv->phy_pclk1); 470 if (ret < 0) { 471 dev_err(dev, "can't enable phy_pclk1.\n"); 472 goto disable_phy_pclk0; 473 } 474 ret = clk_prepare_enable(imxpriv->epcs_tx_clk); 475 if (ret < 0) { 476 dev_err(dev, "can't enable epcs_tx_clk.\n"); 477 goto disable_phy_pclk1; 478 } 479 ret = clk_prepare_enable(imxpriv->epcs_rx_clk); 480 if (ret < 0) { 481 dev_err(dev, "can't enable epcs_rx_clk.\n"); 482 goto disable_epcs_tx_clk; 483 } 484 ret = clk_prepare_enable(imxpriv->phy_apbclk); 485 if (ret < 0) { 486 dev_err(dev, "can't enable phy_apbclk.\n"); 487 goto disable_epcs_rx_clk; 488 } 489 /* Configure PHYx2 PIPE_RSTN */ 490 regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEA_OFFSET + 491 IMX8QM_CSR_PCIE_CTRL2_OFFSET, &val); 492 if ((val & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { 493 /* The link of the PCIEA of HSIO is down */ 494 regmap_update_bits(imxpriv->gpr, 495 IMX8QM_CSR_PHYX2_OFFSET, 496 IMX8QM_PHY_PIPE_RSTN_0 | 497 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0, 498 IMX8QM_PHY_PIPE_RSTN_0 | 499 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0); 500 } 501 regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEB_OFFSET + 502 IMX8QM_CSR_PCIE_CTRL2_OFFSET, ®); 503 if ((reg & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { 504 /* The link of the PCIEB of HSIO is down */ 505 regmap_update_bits(imxpriv->gpr, 506 IMX8QM_CSR_PHYX2_OFFSET, 507 IMX8QM_PHY_PIPE_RSTN_1 | 508 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1, 509 IMX8QM_PHY_PIPE_RSTN_1 | 510 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1); 511 } 512 if (((reg | val) & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { 513 /* The links of both PCIA and PCIEB of HSIO are down */ 514 regmap_update_bits(imxpriv->gpr, 515 IMX8QM_LPCG_PHYX2_OFFSET, 516 IMX8QM_LPCG_PHYX2_PCLK0_MASK | 517 IMX8QM_LPCG_PHYX2_PCLK1_MASK, 518 0); 519 } 520 521 /* set PWR_RST and BT_RST of csr_pciea */ 522 val = IMX8QM_CSR_PCIEA_OFFSET + IMX8QM_CSR_PCIE_CTRL2_OFFSET; 523 regmap_update_bits(imxpriv->gpr, 524 val, 525 IMX8QM_CTRL_BUTTON_RST_N, 526 IMX8QM_CTRL_BUTTON_RST_N); 527 regmap_update_bits(imxpriv->gpr, 528 val, 529 IMX8QM_CTRL_POWER_UP_RST_N, 530 IMX8QM_CTRL_POWER_UP_RST_N); 531 532 /* PHYX1_MODE to SATA */ 533 regmap_update_bits(imxpriv->gpr, 534 IMX8QM_CSR_PHYX1_OFFSET, 535 IMX8QM_PHY_MODE_MASK, 536 IMX8QM_PHY_MODE_SATA); 537 538 /* 539 * BIT0 RXENA 1, BIT1 TXENA 0 540 * BIT12 PHY_X1_EPCS_SEL 1. 541 */ 542 regmap_update_bits(imxpriv->gpr, 543 IMX8QM_CSR_MISC_OFFSET, 544 IMX8QM_MISC_IOB_RXENA, 545 IMX8QM_MISC_IOB_RXENA); 546 regmap_update_bits(imxpriv->gpr, 547 IMX8QM_CSR_MISC_OFFSET, 548 IMX8QM_MISC_IOB_TXENA, 549 0); 550 regmap_update_bits(imxpriv->gpr, 551 IMX8QM_CSR_MISC_OFFSET, 552 IMX8QM_MISC_PHYX1_EPCS_SEL, 553 IMX8QM_MISC_PHYX1_EPCS_SEL); 554 /* 555 * It is possible, for PCIe and SATA are sharing 556 * the same clock source, HPLL or external oscillator. 557 * When PCIe is in low power modes (L1.X or L2 etc), 558 * the clock source can be turned off. In this case, 559 * if this clock source is required to be toggling by 560 * SATA, then SATA functions will be abnormal. 561 * Set the override here to avoid it. 562 */ 563 regmap_update_bits(imxpriv->gpr, 564 IMX8QM_CSR_MISC_OFFSET, 565 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 | 566 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 | 567 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 | 568 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0, 569 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 | 570 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 | 571 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 | 572 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0); 573 574 /* clear PHY RST, then set it */ 575 regmap_update_bits(imxpriv->gpr, 576 IMX8QM_CSR_SATA_OFFSET, 577 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N, 578 0); 579 580 regmap_update_bits(imxpriv->gpr, 581 IMX8QM_CSR_SATA_OFFSET, 582 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N, 583 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N); 584 585 /* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */ 586 regmap_update_bits(imxpriv->gpr, 587 IMX8QM_CSR_SATA_OFFSET, 588 IMX8QM_SATA_CTRL_RESET_N, 589 IMX8QM_SATA_CTRL_RESET_N); 590 udelay(1); 591 regmap_update_bits(imxpriv->gpr, 592 IMX8QM_CSR_SATA_OFFSET, 593 IMX8QM_SATA_CTRL_RESET_N, 594 0); 595 regmap_update_bits(imxpriv->gpr, 596 IMX8QM_CSR_SATA_OFFSET, 597 IMX8QM_SATA_CTRL_RESET_N, 598 IMX8QM_SATA_CTRL_RESET_N); 599 600 /* APB reset */ 601 regmap_update_bits(imxpriv->gpr, 602 IMX8QM_CSR_PHYX1_OFFSET, 603 IMX8QM_PHY_APB_RSTN_0, 604 IMX8QM_PHY_APB_RSTN_0); 605 606 for (i = 0; i < 100; i++) { 607 reg = IMX8QM_CSR_PHYX1_OFFSET + 608 IMX8QM_CSR_PHYX_STTS0_OFFSET; 609 regmap_read(imxpriv->gpr, reg, &val); 610 val &= IMX8QM_STTS0_LANE0_TX_PLL_LOCK; 611 if (val == IMX8QM_STTS0_LANE0_TX_PLL_LOCK) 612 break; 613 udelay(1); 614 } 615 616 if (val != IMX8QM_STTS0_LANE0_TX_PLL_LOCK) { 617 dev_err(dev, "TX PLL of the PHY is not locked\n"); 618 ret = -ENODEV; 619 } else { 620 writeb(imxpriv->imped_ratio, imxpriv->phy_base + 621 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET); 622 writeb(imxpriv->imped_ratio, imxpriv->phy_base + 623 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET); 624 reg = readb(imxpriv->phy_base + 625 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET); 626 if (unlikely(reg != imxpriv->imped_ratio)) 627 dev_info(dev, "Can't set PHY RX impedance ratio.\n"); 628 reg = readb(imxpriv->phy_base + 629 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET); 630 if (unlikely(reg != imxpriv->imped_ratio)) 631 dev_info(dev, "Can't set PHY TX impedance ratio.\n"); 632 usleep_range(50, 100); 633 634 /* 635 * To reduce the power consumption, gate off 636 * the PHY clks 637 */ 638 clk_disable_unprepare(imxpriv->phy_apbclk); 639 clk_disable_unprepare(imxpriv->phy_pclk1); 640 clk_disable_unprepare(imxpriv->phy_pclk0); 641 return ret; 642 } 643 644 clk_disable_unprepare(imxpriv->phy_apbclk); 645 disable_epcs_rx_clk: 646 clk_disable_unprepare(imxpriv->epcs_rx_clk); 647 disable_epcs_tx_clk: 648 clk_disable_unprepare(imxpriv->epcs_tx_clk); 649 disable_phy_pclk1: 650 clk_disable_unprepare(imxpriv->phy_pclk1); 651 disable_phy_pclk0: 652 clk_disable_unprepare(imxpriv->phy_pclk0); 653 654 return ret; 655 } 656 657 static int imx_sata_enable(struct ahci_host_priv *hpriv) 658 { 659 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 660 struct device *dev = &imxpriv->ahci_pdev->dev; 661 int ret; 662 663 if (imxpriv->no_device) 664 return 0; 665 666 ret = ahci_platform_enable_regulators(hpriv); 667 if (ret) 668 return ret; 669 670 ret = clk_prepare_enable(imxpriv->sata_ref_clk); 671 if (ret < 0) 672 goto disable_regulator; 673 674 if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { 675 /* 676 * set PHY Paremeters, two steps to configure the GPR13, 677 * one write for rest of parameters, mask of first write 678 * is 0x07ffffff, and the other one write for setting 679 * the mpll_clk_en. 680 */ 681 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 682 IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK | 683 IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK | 684 IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK | 685 IMX6Q_GPR13_SATA_SPD_MODE_MASK | 686 IMX6Q_GPR13_SATA_MPLL_SS_EN | 687 IMX6Q_GPR13_SATA_TX_ATTEN_MASK | 688 IMX6Q_GPR13_SATA_TX_BOOST_MASK | 689 IMX6Q_GPR13_SATA_TX_LVL_MASK | 690 IMX6Q_GPR13_SATA_MPLL_CLK_EN | 691 IMX6Q_GPR13_SATA_TX_EDGE_RATE, 692 imxpriv->phy_params); 693 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 694 IMX6Q_GPR13_SATA_MPLL_CLK_EN, 695 IMX6Q_GPR13_SATA_MPLL_CLK_EN); 696 697 usleep_range(100, 200); 698 699 ret = imx_sata_phy_reset(hpriv); 700 if (ret) { 701 dev_err(dev, "failed to reset phy: %d\n", ret); 702 goto disable_clk; 703 } 704 } else if (imxpriv->type == AHCI_IMX8QM) { 705 ret = imx8_sata_enable(hpriv); 706 } 707 708 usleep_range(1000, 2000); 709 710 return 0; 711 712 disable_clk: 713 clk_disable_unprepare(imxpriv->sata_ref_clk); 714 disable_regulator: 715 ahci_platform_disable_regulators(hpriv); 716 717 return ret; 718 } 719 720 static void imx_sata_disable(struct ahci_host_priv *hpriv) 721 { 722 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 723 724 if (imxpriv->no_device) 725 return; 726 727 switch (imxpriv->type) { 728 case AHCI_IMX6QP: 729 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, 730 IMX6Q_GPR5_SATA_SW_PD, 731 IMX6Q_GPR5_SATA_SW_PD); 732 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 733 IMX6Q_GPR13_SATA_MPLL_CLK_EN, 734 !IMX6Q_GPR13_SATA_MPLL_CLK_EN); 735 break; 736 737 case AHCI_IMX6Q: 738 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, 739 IMX6Q_GPR13_SATA_MPLL_CLK_EN, 740 !IMX6Q_GPR13_SATA_MPLL_CLK_EN); 741 break; 742 743 case AHCI_IMX8QM: 744 clk_disable_unprepare(imxpriv->epcs_rx_clk); 745 clk_disable_unprepare(imxpriv->epcs_tx_clk); 746 break; 747 748 default: 749 break; 750 } 751 752 clk_disable_unprepare(imxpriv->sata_ref_clk); 753 754 ahci_platform_disable_regulators(hpriv); 755 } 756 757 static void ahci_imx_error_handler(struct ata_port *ap) 758 { 759 u32 reg_val; 760 struct ata_device *dev; 761 struct ata_host *host = dev_get_drvdata(ap->dev); 762 struct ahci_host_priv *hpriv = host->private_data; 763 void __iomem *mmio = hpriv->mmio; 764 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 765 766 ahci_error_handler(ap); 767 768 if (!(imxpriv->first_time) || ahci_imx_hotplug) 769 return; 770 771 imxpriv->first_time = false; 772 773 ata_for_each_dev(dev, &ap->link, ENABLED) 774 return; 775 /* 776 * Disable link to save power. An imx ahci port can't be recovered 777 * without full reset once the pddq mode is enabled making it 778 * impossible to use as part of libata LPM. 779 */ 780 reg_val = readl(mmio + IMX_P0PHYCR); 781 writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR); 782 imx_sata_disable(hpriv); 783 imxpriv->no_device = true; 784 785 dev_info(ap->dev, "no device found, disabling link.\n"); 786 dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n"); 787 } 788 789 static int ahci_imx_softreset(struct ata_link *link, unsigned int *class, 790 unsigned long deadline) 791 { 792 struct ata_port *ap = link->ap; 793 struct ata_host *host = dev_get_drvdata(ap->dev); 794 struct ahci_host_priv *hpriv = host->private_data; 795 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 796 int ret = -EIO; 797 798 if (imxpriv->type == AHCI_IMX53) 799 ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline); 800 else 801 ret = ahci_ops.softreset(link, class, deadline); 802 803 return ret; 804 } 805 806 static struct ata_port_operations ahci_imx_ops = { 807 .inherits = &ahci_ops, 808 .host_stop = ahci_imx_host_stop, 809 .error_handler = ahci_imx_error_handler, 810 .softreset = ahci_imx_softreset, 811 }; 812 813 static const struct ata_port_info ahci_imx_port_info = { 814 .flags = AHCI_FLAG_COMMON, 815 .pio_mask = ATA_PIO4, 816 .udma_mask = ATA_UDMA6, 817 .port_ops = &ahci_imx_ops, 818 }; 819 820 static const struct of_device_id imx_ahci_of_match[] = { 821 { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 }, 822 { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q }, 823 { .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP }, 824 { .compatible = "fsl,imx8qm-ahci", .data = (void *)AHCI_IMX8QM }, 825 {}, 826 }; 827 MODULE_DEVICE_TABLE(of, imx_ahci_of_match); 828 829 struct reg_value { 830 u32 of_value; 831 u32 reg_value; 832 }; 833 834 struct reg_property { 835 const char *name; 836 const struct reg_value *values; 837 size_t num_values; 838 u32 def_value; 839 u32 set_value; 840 }; 841 842 static const struct reg_value gpr13_tx_level[] = { 843 { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V }, 844 { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V }, 845 { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V }, 846 { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V }, 847 { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V }, 848 { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V }, 849 { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V }, 850 { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V }, 851 { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V }, 852 { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V }, 853 { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V }, 854 { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V }, 855 { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V }, 856 { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V }, 857 { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V }, 858 { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V }, 859 { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V }, 860 { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V }, 861 { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V }, 862 { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V }, 863 { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V }, 864 { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V }, 865 { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V }, 866 { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V }, 867 { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V }, 868 { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V }, 869 { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V }, 870 { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V }, 871 { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V }, 872 { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V }, 873 { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V }, 874 { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V } 875 }; 876 877 static const struct reg_value gpr13_tx_boost[] = { 878 { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB }, 879 { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB }, 880 { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB }, 881 { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB }, 882 { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB }, 883 { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB }, 884 { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB }, 885 { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB }, 886 { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB }, 887 { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB }, 888 { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB }, 889 { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB }, 890 { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB }, 891 { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB }, 892 { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB }, 893 { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB } 894 }; 895 896 static const struct reg_value gpr13_tx_atten[] = { 897 { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 }, 898 { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 }, 899 { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 }, 900 { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 }, 901 { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 }, 902 { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 }, 903 }; 904 905 static const struct reg_value gpr13_rx_eq[] = { 906 { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB }, 907 { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB }, 908 { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB }, 909 { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB }, 910 { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB }, 911 { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB }, 912 { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB }, 913 { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB }, 914 }; 915 916 static const struct reg_property gpr13_props[] = { 917 { 918 .name = "fsl,transmit-level-mV", 919 .values = gpr13_tx_level, 920 .num_values = ARRAY_SIZE(gpr13_tx_level), 921 .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V, 922 }, { 923 .name = "fsl,transmit-boost-mdB", 924 .values = gpr13_tx_boost, 925 .num_values = ARRAY_SIZE(gpr13_tx_boost), 926 .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB, 927 }, { 928 .name = "fsl,transmit-atten-16ths", 929 .values = gpr13_tx_atten, 930 .num_values = ARRAY_SIZE(gpr13_tx_atten), 931 .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16, 932 }, { 933 .name = "fsl,receive-eq-mdB", 934 .values = gpr13_rx_eq, 935 .num_values = ARRAY_SIZE(gpr13_rx_eq), 936 .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB, 937 }, { 938 .name = "fsl,no-spread-spectrum", 939 .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN, 940 .set_value = 0, 941 }, 942 }; 943 944 static u32 imx_ahci_parse_props(struct device *dev, 945 const struct reg_property *prop, size_t num) 946 { 947 struct device_node *np = dev->of_node; 948 u32 reg_value = 0; 949 int i, j; 950 951 for (i = 0; i < num; i++, prop++) { 952 u32 of_val; 953 954 if (prop->num_values == 0) { 955 if (of_property_read_bool(np, prop->name)) 956 reg_value |= prop->set_value; 957 else 958 reg_value |= prop->def_value; 959 continue; 960 } 961 962 if (of_property_read_u32(np, prop->name, &of_val)) { 963 dev_info(dev, "%s not specified, using %08x\n", 964 prop->name, prop->def_value); 965 reg_value |= prop->def_value; 966 continue; 967 } 968 969 for (j = 0; j < prop->num_values; j++) { 970 if (prop->values[j].of_value == of_val) { 971 dev_info(dev, "%s value %u, using %08x\n", 972 prop->name, of_val, prop->values[j].reg_value); 973 reg_value |= prop->values[j].reg_value; 974 break; 975 } 976 } 977 978 if (j == prop->num_values) { 979 dev_err(dev, "DT property %s is not a valid value\n", 980 prop->name); 981 reg_value |= prop->def_value; 982 } 983 } 984 985 return reg_value; 986 } 987 988 static struct scsi_host_template ahci_platform_sht = { 989 AHCI_SHT(DRV_NAME), 990 }; 991 992 static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv) 993 { 994 int ret; 995 struct resource *phy_res; 996 struct platform_device *pdev = imxpriv->ahci_pdev; 997 struct device_node *np = dev->of_node; 998 999 if (of_property_read_u32(np, "fsl,phy-imp", &imxpriv->imped_ratio)) 1000 imxpriv->imped_ratio = IMX8QM_SATA_PHY_IMPED_RATIO_85OHM; 1001 phy_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy"); 1002 if (phy_res) { 1003 imxpriv->phy_base = devm_ioremap(dev, phy_res->start, 1004 resource_size(phy_res)); 1005 if (!imxpriv->phy_base) { 1006 dev_err(dev, "error with ioremap\n"); 1007 return -ENOMEM; 1008 } 1009 } else { 1010 dev_err(dev, "missing *phy* reg region.\n"); 1011 return -ENOMEM; 1012 } 1013 imxpriv->gpr = 1014 syscon_regmap_lookup_by_phandle(np, "hsio"); 1015 if (IS_ERR(imxpriv->gpr)) { 1016 dev_err(dev, "unable to find gpr registers\n"); 1017 return PTR_ERR(imxpriv->gpr); 1018 } 1019 1020 imxpriv->epcs_tx_clk = devm_clk_get(dev, "epcs_tx"); 1021 if (IS_ERR(imxpriv->epcs_tx_clk)) { 1022 dev_err(dev, "can't get epcs_tx_clk clock.\n"); 1023 return PTR_ERR(imxpriv->epcs_tx_clk); 1024 } 1025 imxpriv->epcs_rx_clk = devm_clk_get(dev, "epcs_rx"); 1026 if (IS_ERR(imxpriv->epcs_rx_clk)) { 1027 dev_err(dev, "can't get epcs_rx_clk clock.\n"); 1028 return PTR_ERR(imxpriv->epcs_rx_clk); 1029 } 1030 imxpriv->phy_pclk0 = devm_clk_get(dev, "phy_pclk0"); 1031 if (IS_ERR(imxpriv->phy_pclk0)) { 1032 dev_err(dev, "can't get phy_pclk0 clock.\n"); 1033 return PTR_ERR(imxpriv->phy_pclk0); 1034 } 1035 imxpriv->phy_pclk1 = devm_clk_get(dev, "phy_pclk1"); 1036 if (IS_ERR(imxpriv->phy_pclk1)) { 1037 dev_err(dev, "can't get phy_pclk1 clock.\n"); 1038 return PTR_ERR(imxpriv->phy_pclk1); 1039 } 1040 imxpriv->phy_apbclk = devm_clk_get(dev, "phy_apbclk"); 1041 if (IS_ERR(imxpriv->phy_apbclk)) { 1042 dev_err(dev, "can't get phy_apbclk clock.\n"); 1043 return PTR_ERR(imxpriv->phy_apbclk); 1044 } 1045 1046 /* Fetch GPIO, then enable the external OSC */ 1047 imxpriv->clkreq_gpio = of_get_named_gpio(np, "clkreq-gpio", 0); 1048 if (gpio_is_valid(imxpriv->clkreq_gpio)) { 1049 ret = devm_gpio_request_one(dev, imxpriv->clkreq_gpio, 1050 GPIOF_OUT_INIT_LOW, 1051 "SATA CLKREQ"); 1052 if (ret == -EBUSY) { 1053 dev_info(dev, "clkreq had been initialized.\n"); 1054 } else if (ret) { 1055 dev_err(dev, "%d unable to get clkreq.\n", ret); 1056 return ret; 1057 } 1058 } else if (imxpriv->clkreq_gpio == -EPROBE_DEFER) { 1059 return imxpriv->clkreq_gpio; 1060 } 1061 1062 return 0; 1063 } 1064 1065 static int imx_ahci_probe(struct platform_device *pdev) 1066 { 1067 struct device *dev = &pdev->dev; 1068 const struct of_device_id *of_id; 1069 struct ahci_host_priv *hpriv; 1070 struct imx_ahci_priv *imxpriv; 1071 unsigned int reg_val; 1072 int ret; 1073 1074 of_id = of_match_device(imx_ahci_of_match, dev); 1075 if (!of_id) 1076 return -EINVAL; 1077 1078 imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL); 1079 if (!imxpriv) 1080 return -ENOMEM; 1081 1082 imxpriv->ahci_pdev = pdev; 1083 imxpriv->no_device = false; 1084 imxpriv->first_time = true; 1085 imxpriv->type = (enum ahci_imx_type)of_id->data; 1086 1087 imxpriv->sata_clk = devm_clk_get(dev, "sata"); 1088 if (IS_ERR(imxpriv->sata_clk)) { 1089 dev_err(dev, "can't get sata clock.\n"); 1090 return PTR_ERR(imxpriv->sata_clk); 1091 } 1092 1093 imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref"); 1094 if (IS_ERR(imxpriv->sata_ref_clk)) { 1095 dev_err(dev, "can't get sata_ref clock.\n"); 1096 return PTR_ERR(imxpriv->sata_ref_clk); 1097 } 1098 1099 imxpriv->ahb_clk = devm_clk_get(dev, "ahb"); 1100 if (IS_ERR(imxpriv->ahb_clk)) { 1101 dev_err(dev, "can't get ahb clock.\n"); 1102 return PTR_ERR(imxpriv->ahb_clk); 1103 } 1104 1105 if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { 1106 u32 reg_value; 1107 1108 imxpriv->gpr = syscon_regmap_lookup_by_compatible( 1109 "fsl,imx6q-iomuxc-gpr"); 1110 if (IS_ERR(imxpriv->gpr)) { 1111 dev_err(dev, 1112 "failed to find fsl,imx6q-iomux-gpr regmap\n"); 1113 return PTR_ERR(imxpriv->gpr); 1114 } 1115 1116 reg_value = imx_ahci_parse_props(dev, gpr13_props, 1117 ARRAY_SIZE(gpr13_props)); 1118 1119 imxpriv->phy_params = 1120 IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | 1121 IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | 1122 IMX6Q_GPR13_SATA_SPD_MODE_3P0G | 1123 reg_value; 1124 } else if (imxpriv->type == AHCI_IMX8QM) { 1125 ret = imx8_sata_probe(dev, imxpriv); 1126 if (ret) 1127 return ret; 1128 } 1129 1130 hpriv = ahci_platform_get_resources(pdev, 0); 1131 if (IS_ERR(hpriv)) 1132 return PTR_ERR(hpriv); 1133 1134 hpriv->plat_data = imxpriv; 1135 1136 ret = clk_prepare_enable(imxpriv->sata_clk); 1137 if (ret) 1138 return ret; 1139 1140 if (imxpriv->type == AHCI_IMX53 && 1141 IS_ENABLED(CONFIG_HWMON)) { 1142 /* Add the temperature monitor */ 1143 struct device *hwmon_dev; 1144 1145 hwmon_dev = 1146 devm_hwmon_device_register_with_groups(dev, 1147 "sata_ahci", 1148 hpriv, 1149 fsl_sata_ahci_groups); 1150 if (IS_ERR(hwmon_dev)) { 1151 ret = PTR_ERR(hwmon_dev); 1152 goto disable_clk; 1153 } 1154 devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev, 1155 &fsl_sata_ahci_of_thermal_ops); 1156 dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev)); 1157 } 1158 1159 ret = imx_sata_enable(hpriv); 1160 if (ret) 1161 goto disable_clk; 1162 1163 /* 1164 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL, 1165 * and IP vendor specific register IMX_TIMER1MS. 1166 * Configure CAP_SSS (support stagered spin up). 1167 * Implement the port0. 1168 * Get the ahb clock rate, and configure the TIMER1MS register. 1169 */ 1170 reg_val = readl(hpriv->mmio + HOST_CAP); 1171 if (!(reg_val & HOST_CAP_SSS)) { 1172 reg_val |= HOST_CAP_SSS; 1173 writel(reg_val, hpriv->mmio + HOST_CAP); 1174 } 1175 reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL); 1176 if (!(reg_val & 0x1)) { 1177 reg_val |= 0x1; 1178 writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL); 1179 } 1180 1181 reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000; 1182 writel(reg_val, hpriv->mmio + IMX_TIMER1MS); 1183 1184 ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, 1185 &ahci_platform_sht); 1186 if (ret) 1187 goto disable_sata; 1188 1189 return 0; 1190 1191 disable_sata: 1192 imx_sata_disable(hpriv); 1193 disable_clk: 1194 clk_disable_unprepare(imxpriv->sata_clk); 1195 return ret; 1196 } 1197 1198 static void ahci_imx_host_stop(struct ata_host *host) 1199 { 1200 struct ahci_host_priv *hpriv = host->private_data; 1201 struct imx_ahci_priv *imxpriv = hpriv->plat_data; 1202 1203 imx_sata_disable(hpriv); 1204 clk_disable_unprepare(imxpriv->sata_clk); 1205 } 1206 1207 #ifdef CONFIG_PM_SLEEP 1208 static int imx_ahci_suspend(struct device *dev) 1209 { 1210 struct ata_host *host = dev_get_drvdata(dev); 1211 struct ahci_host_priv *hpriv = host->private_data; 1212 int ret; 1213 1214 ret = ahci_platform_suspend_host(dev); 1215 if (ret) 1216 return ret; 1217 1218 imx_sata_disable(hpriv); 1219 1220 return 0; 1221 } 1222 1223 static int imx_ahci_resume(struct device *dev) 1224 { 1225 struct ata_host *host = dev_get_drvdata(dev); 1226 struct ahci_host_priv *hpriv = host->private_data; 1227 int ret; 1228 1229 ret = imx_sata_enable(hpriv); 1230 if (ret) 1231 return ret; 1232 1233 return ahci_platform_resume_host(dev); 1234 } 1235 #endif 1236 1237 static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume); 1238 1239 static struct platform_driver imx_ahci_driver = { 1240 .probe = imx_ahci_probe, 1241 .remove = ata_platform_remove_one, 1242 .driver = { 1243 .name = DRV_NAME, 1244 .of_match_table = imx_ahci_of_match, 1245 .pm = &ahci_imx_pm_ops, 1246 }, 1247 }; 1248 module_platform_driver(imx_ahci_driver); 1249 1250 MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver"); 1251 MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>"); 1252 MODULE_LICENSE("GPL"); 1253 MODULE_ALIAS("ahci:imx"); 1254