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Linux 4.19.133
[linux/fpc-iii.git] / drivers / ata / ahci_imx.c
blobb00799d208f509740cdd84bb1743625c7a9f6b62
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, &reg);
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");
Linux with added FPC-III support