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[J-linux.git] / drivers / ata / ahci_imx.c
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/property.h>
13 #include <linux/regmap.h>
14 #include <linux/ahci_platform.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/of.h>
17 #include <linux/mfd/syscon.h>
18 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
19 #include <linux/libata.h>
20 #include <linux/hwmon.h>
21 #include <linux/hwmon-sysfs.h>
22 #include <linux/phy/phy.h>
23 #include <linux/thermal.h>
24 #include "ahci.h"
25
26 #define DRV_NAME "ahci-imx"
27
28 enum {
29         /* Timer 1-ms Register */
30         IMX_TIMER1MS                            = 0x00e0,
31         /* Port0 PHY Control Register */
32         IMX_P0PHYCR                             = 0x0178,
33         IMX_P0PHYCR_TEST_PDDQ                   = 1 << 20,
34         IMX_P0PHYCR_CR_READ                     = 1 << 19,
35         IMX_P0PHYCR_CR_WRITE                    = 1 << 18,
36         IMX_P0PHYCR_CR_CAP_DATA                 = 1 << 17,
37         IMX_P0PHYCR_CR_CAP_ADDR                 = 1 << 16,
38         /* Port0 PHY Status Register */
39         IMX_P0PHYSR                             = 0x017c,
40         IMX_P0PHYSR_CR_ACK                      = 1 << 18,
41         IMX_P0PHYSR_CR_DATA_OUT                 = 0xffff << 0,
42         /* Lane0 Output Status Register */
43         IMX_LANE0_OUT_STAT                      = 0x2003,
44         IMX_LANE0_OUT_STAT_RX_PLL_STATE         = 1 << 1,
45         /* Clock Reset Register */
46         IMX_CLOCK_RESET                         = 0x7f3f,
47         IMX_CLOCK_RESET_RESET                   = 1 << 0,
48         /* IMX8QM SATA specific control registers */
49         IMX8QM_SATA_AHCI_PTC                    = 0xc8,
50         IMX8QM_SATA_AHCI_PTC_RXWM_MASK          = GENMASK(6, 0),
51         IMX8QM_SATA_AHCI_PTC_RXWM               = 0x29,
52 };
53
54 enum ahci_imx_type {
55         AHCI_IMX53,
56         AHCI_IMX6Q,
57         AHCI_IMX6QP,
58         AHCI_IMX8QM,
59 };
60
61 struct imx_ahci_priv {
62         struct platform_device *ahci_pdev;
63         enum ahci_imx_type type;
64         struct clk *sata_clk;
65         struct clk *sata_ref_clk;
66         struct clk *ahb_clk;
67         struct regmap *gpr;
68         struct phy *sata_phy;
69         struct phy *cali_phy0;
70         struct phy *cali_phy1;
71         bool no_device;
72         bool first_time;
73         u32 phy_params;
74         u32 imped_ratio;
75 };
76
77 static int ahci_imx_hotplug;
78 module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
79 MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
80
81 static void ahci_imx_host_stop(struct ata_host *host);
82
83 static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert)
84 {
85         int timeout = 10;
86         u32 crval;
87         u32 srval;
88
89         /* Assert or deassert the bit */
90         crval = readl(mmio + IMX_P0PHYCR);
91         if (assert)
92                 crval |= bit;
93         else
94                 crval &= ~bit;
95         writel(crval, mmio + IMX_P0PHYCR);
96
97         /* Wait for the cr_ack signal */
98         do {
99                 srval = readl(mmio + IMX_P0PHYSR);
100                 if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK)
101                         break;
102                 usleep_range(100, 200);
103         } while (--timeout);
104
105         return timeout ? 0 : -ETIMEDOUT;
106 }
107
108 static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio)
109 {
110         u32 crval = addr;
111         int ret;
112
113         /* Supply the address on cr_data_in */
114         writel(crval, mmio + IMX_P0PHYCR);
115
116         /* Assert the cr_cap_addr signal */
117         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true);
118         if (ret)
119                 return ret;
120
121         /* Deassert cr_cap_addr */
122         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false);
123         if (ret)
124                 return ret;
125
126         return 0;
127 }
128
129 static int imx_phy_reg_write(u16 val, void __iomem *mmio)
130 {
131         u32 crval = val;
132         int ret;
133
134         /* Supply the data on cr_data_in */
135         writel(crval, mmio + IMX_P0PHYCR);
136
137         /* Assert the cr_cap_data signal */
138         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true);
139         if (ret)
140                 return ret;
141
142         /* Deassert cr_cap_data */
143         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false);
144         if (ret)
145                 return ret;
146
147         if (val & IMX_CLOCK_RESET_RESET) {
148                 /*
149                  * In case we're resetting the phy, it's unable to acknowledge,
150                  * so we return immediately here.
151                  */
152                 crval |= IMX_P0PHYCR_CR_WRITE;
153                 writel(crval, mmio + IMX_P0PHYCR);
154                 goto out;
155         }
156
157         /* Assert the cr_write signal */
158         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true);
159         if (ret)
160                 return ret;
161
162         /* Deassert cr_write */
163         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false);
164         if (ret)
165                 return ret;
166
167 out:
168         return 0;
169 }
170
171 static int imx_phy_reg_read(u16 *val, void __iomem *mmio)
172 {
173         int ret;
174
175         /* Assert the cr_read signal */
176         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true);
177         if (ret)
178                 return ret;
179
180         /* Capture the data from cr_data_out[] */
181         *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT;
182
183         /* Deassert cr_read */
184         ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false);
185         if (ret)
186                 return ret;
187
188         return 0;
189 }
190
191 static int imx_sata_phy_reset(struct ahci_host_priv *hpriv)
192 {
193         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
194         void __iomem *mmio = hpriv->mmio;
195         int timeout = 10;
196         u16 val;
197         int ret;
198
199         if (imxpriv->type == AHCI_IMX6QP) {
200                 /* 6qp adds the sata reset mechanism, use it for 6qp sata */
201                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
202                                    IMX6Q_GPR5_SATA_SW_PD, 0);
203
204                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
205                                    IMX6Q_GPR5_SATA_SW_RST, 0);
206                 udelay(50);
207                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
208                                    IMX6Q_GPR5_SATA_SW_RST,
209                                    IMX6Q_GPR5_SATA_SW_RST);
210                 return 0;
211         }
212
213         /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */
214         ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio);
215         if (ret)
216                 return ret;
217         ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio);
218         if (ret)
219                 return ret;
220
221         /* Wait for PHY RX_PLL to be stable */
222         do {
223                 usleep_range(100, 200);
224                 ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio);
225                 if (ret)
226                         return ret;
227                 ret = imx_phy_reg_read(&val, mmio);
228                 if (ret)
229                         return ret;
230                 if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE)
231                         break;
232         } while (--timeout);
233
234         return timeout ? 0 : -ETIMEDOUT;
235 }
236
237 enum {
238         /* SATA PHY Register */
239         SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT = 0x0001,
240         SATA_PHY_CR_CLOCK_DAC_CTL = 0x0008,
241         SATA_PHY_CR_CLOCK_RTUNE_CTL = 0x0009,
242         SATA_PHY_CR_CLOCK_ADC_OUT = 0x000A,
243         SATA_PHY_CR_CLOCK_MPLL_TST = 0x0017,
244 };
245
246 static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio)
247 {
248         u16 adc_out_reg, read_sum;
249         u32 index, read_attempt;
250         const u32 attempt_limit = 200;
251
252         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
253         imx_phy_reg_write(rtune_ctl_reg, mmio);
254
255         /* two dummy read */
256         index = 0;
257         read_attempt = 0;
258         adc_out_reg = 0;
259         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_ADC_OUT, mmio);
260         while (index < 2) {
261                 imx_phy_reg_read(&adc_out_reg, mmio);
262                 /* check if valid */
263                 if (adc_out_reg & 0x400)
264                         index++;
265
266                 read_attempt++;
267                 if (read_attempt > attempt_limit) {
268                         dev_err(dev, "Read REG more than %d times!\n",
269                                 attempt_limit);
270                         break;
271                 }
272         }
273
274         index = 0;
275         read_attempt = 0;
276         read_sum = 0;
277         while (index < 80) {
278                 imx_phy_reg_read(&adc_out_reg, mmio);
279                 if (adc_out_reg & 0x400) {
280                         read_sum = read_sum + (adc_out_reg & 0x3FF);
281                         index++;
282                 }
283                 read_attempt++;
284                 if (read_attempt > attempt_limit) {
285                         dev_err(dev, "Read REG more than %d times!\n",
286                                 attempt_limit);
287                         break;
288                 }
289         }
290
291         /* Use the U32 to make 1000 precision */
292         return (read_sum * 1000) / 80;
293 }
294
295 /* SATA AHCI temperature monitor */
296 static int __sata_ahci_read_temperature(void *dev, int *temp)
297 {
298         u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum;
299         u32 str1, str2, str3, str4;
300         int m1, m2, a;
301         struct ahci_host_priv *hpriv = dev_get_drvdata(dev);
302         void __iomem *mmio = hpriv->mmio;
303
304         /* check rd-wr to reg */
305         read_sum = 0;
306         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT, mmio);
307         imx_phy_reg_write(read_sum, mmio);
308         imx_phy_reg_read(&read_sum, mmio);
309         if ((read_sum & 0xffff) != 0)
310                 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
311
312         imx_phy_reg_write(0x5A5A, mmio);
313         imx_phy_reg_read(&read_sum, mmio);
314         if ((read_sum & 0xffff) != 0x5A5A)
315                 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
316
317         imx_phy_reg_write(0x1234, mmio);
318         imx_phy_reg_read(&read_sum, mmio);
319         if ((read_sum & 0xffff) != 0x1234)
320                 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
321
322         /* start temperature test */
323         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
324         imx_phy_reg_read(&mpll_test_reg, mmio);
325         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
326         imx_phy_reg_read(&rtune_ctl_reg, mmio);
327         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
328         imx_phy_reg_read(&dac_ctl_reg, mmio);
329
330         /* mpll_tst.meas_iv   ([12:2]) */
331         str1 = (mpll_test_reg >> 2) & 0x7FF;
332         /* rtune_ctl.mode     ([1:0]) */
333         str2 = (rtune_ctl_reg) & 0x3;
334         /* dac_ctl.dac_mode   ([14:12]) */
335         str3 = (dac_ctl_reg >> 12)  & 0x7;
336         /* rtune_ctl.sel_atbp ([4]) */
337         str4 = (rtune_ctl_reg >> 4);
338
339         /* Calculate the m1 */
340         /* mpll_tst.meas_iv */
341         mpll_test_reg = (mpll_test_reg & 0xE03) | (512) << 2;
342         /* rtune_ctl.mode */
343         rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (1);
344         /* dac_ctl.dac_mode */
345         dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (4) << 12;
346         /* rtune_ctl.sel_atbp */
347         rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (0) << 4;
348         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
349         imx_phy_reg_write(mpll_test_reg, mmio);
350         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
351         imx_phy_reg_write(dac_ctl_reg, mmio);
352         m1 = read_adc_sum(dev, rtune_ctl_reg, mmio);
353
354         /* Calculate the m2 */
355         /* rtune_ctl.sel_atbp */
356         rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (1) << 4;
357         m2 = read_adc_sum(dev, rtune_ctl_reg, mmio);
358
359         /* restore the status  */
360         /* mpll_tst.meas_iv */
361         mpll_test_reg = (mpll_test_reg & 0xE03) | (str1) << 2;
362         /* rtune_ctl.mode */
363         rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (str2);
364         /* dac_ctl.dac_mode */
365         dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (str3) << 12;
366         /* rtune_ctl.sel_atbp */
367         rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (str4) << 4;
368
369         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
370         imx_phy_reg_write(mpll_test_reg, mmio);
371         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
372         imx_phy_reg_write(dac_ctl_reg, mmio);
373         imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
374         imx_phy_reg_write(rtune_ctl_reg, mmio);
375
376         /* Compute temperature */
377         if (!(m2 / 1000))
378                 m2 = 1000;
379         a = (m2 - m1) / (m2/1000);
380         *temp = ((-559) * a * a) / 1000 + (1379) * a + (-458000);
381
382         return 0;
383 }
384
385 static int sata_ahci_read_temperature(struct thermal_zone_device *tz, int *temp)
386 {
387         return __sata_ahci_read_temperature(thermal_zone_device_priv(tz), temp);
388 }
389
390 static ssize_t sata_ahci_show_temp(struct device *dev,
391                                    struct device_attribute *da,
392                                    char *buf)
393 {
394         unsigned int temp = 0;
395         int err;
396
397         err = __sata_ahci_read_temperature(dev, &temp);
398         if (err < 0)
399                 return err;
400
401         return sprintf(buf, "%u\n", temp);
402 }
403
404 static const struct thermal_zone_device_ops fsl_sata_ahci_of_thermal_ops = {
405         .get_temp = sata_ahci_read_temperature,
406 };
407
408 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sata_ahci_show_temp, NULL, 0);
409
410 static struct attribute *fsl_sata_ahci_attrs[] = {
411         &sensor_dev_attr_temp1_input.dev_attr.attr,
412         NULL
413 };
414 ATTRIBUTE_GROUPS(fsl_sata_ahci);
415
416 static int imx8_sata_enable(struct ahci_host_priv *hpriv)
417 {
418         u32 val;
419         int ret;
420         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
421         struct device *dev = &imxpriv->ahci_pdev->dev;
422
423         /*
424          * Since "REXT" pin is only present for first lane of i.MX8QM
425          * PHY, its calibration results will be stored, passed through
426          * to the second lane PHY, and shared with all three lane PHYs.
427          *
428          * Initialize the first two lane PHYs here, although only the
429          * third lane PHY is used by SATA.
430          */
431         ret = phy_init(imxpriv->cali_phy0);
432         if (ret) {
433                 dev_err(dev, "cali PHY init failed\n");
434                 return ret;
435         }
436         ret = phy_power_on(imxpriv->cali_phy0);
437         if (ret) {
438                 dev_err(dev, "cali PHY power on failed\n");
439                 goto err_cali_phy0_exit;
440         }
441         ret = phy_init(imxpriv->cali_phy1);
442         if (ret) {
443                 dev_err(dev, "cali PHY1 init failed\n");
444                 goto err_cali_phy0_off;
445         }
446         ret = phy_power_on(imxpriv->cali_phy1);
447         if (ret) {
448                 dev_err(dev, "cali PHY1 power on failed\n");
449                 goto err_cali_phy1_exit;
450         }
451         ret = phy_init(imxpriv->sata_phy);
452         if (ret) {
453                 dev_err(dev, "sata PHY init failed\n");
454                 goto err_cali_phy1_off;
455         }
456         ret = phy_set_mode(imxpriv->sata_phy, PHY_MODE_SATA);
457         if (ret) {
458                 dev_err(dev, "unable to set SATA PHY mode\n");
459                 goto err_sata_phy_exit;
460         }
461         ret = phy_power_on(imxpriv->sata_phy);
462         if (ret) {
463                 dev_err(dev, "sata PHY power up failed\n");
464                 goto err_sata_phy_exit;
465         }
466
467         /* The cali_phy# can be turned off after SATA PHY is initialized. */
468         phy_power_off(imxpriv->cali_phy1);
469         phy_exit(imxpriv->cali_phy1);
470         phy_power_off(imxpriv->cali_phy0);
471         phy_exit(imxpriv->cali_phy0);
472
473         /* RxWaterMark setting */
474         val = readl(hpriv->mmio + IMX8QM_SATA_AHCI_PTC);
475         val &= ~IMX8QM_SATA_AHCI_PTC_RXWM_MASK;
476         val |= IMX8QM_SATA_AHCI_PTC_RXWM;
477         writel(val, hpriv->mmio + IMX8QM_SATA_AHCI_PTC);
478
479         return 0;
480
481 err_sata_phy_exit:
482         phy_exit(imxpriv->sata_phy);
483 err_cali_phy1_off:
484         phy_power_off(imxpriv->cali_phy1);
485 err_cali_phy1_exit:
486         phy_exit(imxpriv->cali_phy1);
487 err_cali_phy0_off:
488         phy_power_off(imxpriv->cali_phy0);
489 err_cali_phy0_exit:
490         phy_exit(imxpriv->cali_phy0);
491
492         return ret;
493 }
494
495 static int imx_sata_enable(struct ahci_host_priv *hpriv)
496 {
497         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
498         struct device *dev = &imxpriv->ahci_pdev->dev;
499         int ret;
500
501         if (imxpriv->no_device)
502                 return 0;
503
504         ret = ahci_platform_enable_regulators(hpriv);
505         if (ret)
506                 return ret;
507
508         ret = clk_prepare_enable(imxpriv->sata_ref_clk);
509         if (ret < 0)
510                 goto disable_regulator;
511
512         if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) {
513                 /*
514                  * set PHY Parameters, two steps to configure the GPR13,
515                  * one write for rest of parameters, mask of first write
516                  * is 0x07ffffff, and the other one write for setting
517                  * the mpll_clk_en.
518                  */
519                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
520                                    IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK |
521                                    IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK |
522                                    IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK |
523                                    IMX6Q_GPR13_SATA_SPD_MODE_MASK |
524                                    IMX6Q_GPR13_SATA_MPLL_SS_EN |
525                                    IMX6Q_GPR13_SATA_TX_ATTEN_MASK |
526                                    IMX6Q_GPR13_SATA_TX_BOOST_MASK |
527                                    IMX6Q_GPR13_SATA_TX_LVL_MASK |
528                                    IMX6Q_GPR13_SATA_MPLL_CLK_EN |
529                                    IMX6Q_GPR13_SATA_TX_EDGE_RATE,
530                                    imxpriv->phy_params);
531                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
532                                    IMX6Q_GPR13_SATA_MPLL_CLK_EN,
533                                    IMX6Q_GPR13_SATA_MPLL_CLK_EN);
534
535                 usleep_range(100, 200);
536
537                 ret = imx_sata_phy_reset(hpriv);
538                 if (ret) {
539                         dev_err(dev, "failed to reset phy: %d\n", ret);
540                         goto disable_clk;
541                 }
542         } else if (imxpriv->type == AHCI_IMX8QM) {
543                 ret = imx8_sata_enable(hpriv);
544                 if (ret)
545                         goto disable_clk;
546
547         }
548
549         usleep_range(1000, 2000);
550
551         return 0;
552
553 disable_clk:
554         clk_disable_unprepare(imxpriv->sata_ref_clk);
555 disable_regulator:
556         ahci_platform_disable_regulators(hpriv);
557
558         return ret;
559 }
560
561 static void imx_sata_disable(struct ahci_host_priv *hpriv)
562 {
563         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
564
565         if (imxpriv->no_device)
566                 return;
567
568         switch (imxpriv->type) {
569         case AHCI_IMX6QP:
570                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
571                                    IMX6Q_GPR5_SATA_SW_PD,
572                                    IMX6Q_GPR5_SATA_SW_PD);
573                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
574                                    IMX6Q_GPR13_SATA_MPLL_CLK_EN,
575                                    !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
576                 break;
577
578         case AHCI_IMX6Q:
579                 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
580                                    IMX6Q_GPR13_SATA_MPLL_CLK_EN,
581                                    !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
582                 break;
583
584         case AHCI_IMX8QM:
585                 if (imxpriv->sata_phy) {
586                         phy_power_off(imxpriv->sata_phy);
587                         phy_exit(imxpriv->sata_phy);
588                 }
589                 break;
590
591         default:
592                 break;
593         }
594
595         clk_disable_unprepare(imxpriv->sata_ref_clk);
596
597         ahci_platform_disable_regulators(hpriv);
598 }
599
600 static void ahci_imx_error_handler(struct ata_port *ap)
601 {
602         u32 reg_val;
603         struct ata_device *dev;
604         struct ata_host *host = dev_get_drvdata(ap->dev);
605         struct ahci_host_priv *hpriv = host->private_data;
606         void __iomem *mmio = hpriv->mmio;
607         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
608
609         ahci_error_handler(ap);
610
611         if (imxpriv->type == AHCI_IMX8QM)
612                 return;
613
614         if (!(imxpriv->first_time) || ahci_imx_hotplug)
615                 return;
616
617         imxpriv->first_time = false;
618
619         ata_for_each_dev(dev, &ap->link, ENABLED)
620                 return;
621         /*
622          * Disable link to save power.  An imx ahci port can't be recovered
623          * without full reset once the pddq mode is enabled making it
624          * impossible to use as part of libata LPM.
625          */
626         reg_val = readl(mmio + IMX_P0PHYCR);
627         writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR);
628         imx_sata_disable(hpriv);
629         imxpriv->no_device = true;
630
631         dev_info(ap->dev, "no device found, disabling link.\n");
632         dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n");
633 }
634
635 static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,
636                        unsigned long deadline)
637 {
638         struct ata_port *ap = link->ap;
639         struct ata_host *host = dev_get_drvdata(ap->dev);
640         struct ahci_host_priv *hpriv = host->private_data;
641         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
642         int ret;
643
644         if (imxpriv->type == AHCI_IMX53)
645                 ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline);
646         else
647                 ret = ahci_ops.softreset(link, class, deadline);
648
649         return ret;
650 }
651
652 static struct ata_port_operations ahci_imx_ops = {
653         .inherits       = &ahci_ops,
654         .host_stop      = ahci_imx_host_stop,
655         .error_handler  = ahci_imx_error_handler,
656         .softreset      = ahci_imx_softreset,
657 };
658
659 static const struct ata_port_info ahci_imx_port_info = {
660         .flags          = AHCI_FLAG_COMMON,
661         .pio_mask       = ATA_PIO4,
662         .udma_mask      = ATA_UDMA6,
663         .port_ops       = &ahci_imx_ops,
664 };
665
666 static const struct of_device_id imx_ahci_of_match[] = {
667         { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 },
668         { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q },
669         { .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP },
670         { .compatible = "fsl,imx8qm-ahci", .data = (void *)AHCI_IMX8QM },
671         { /* sentinel */ }
672 };
673 MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
674
675 struct reg_value {
676         u32 of_value;
677         u32 reg_value;
678 };
679
680 struct reg_property {
681         const char *name;
682         const struct reg_value *values;
683         size_t num_values;
684         u32 def_value;
685         u32 set_value;
686 };
687
688 static const struct reg_value gpr13_tx_level[] = {
689         {  937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V },
690         {  947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V },
691         {  957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V },
692         {  966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V },
693         {  976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V },
694         {  986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V },
695         {  996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V },
696         { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V },
697         { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V },
698         { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V },
699         { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V },
700         { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V },
701         { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V },
702         { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V },
703         { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V },
704         { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V },
705         { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V },
706         { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V },
707         { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V },
708         { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V },
709         { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V },
710         { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V },
711         { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V },
712         { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V },
713         { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V },
714         { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V },
715         { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V },
716         { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V },
717         { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V },
718         { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V },
719         { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V },
720         { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V }
721 };
722
723 static const struct reg_value gpr13_tx_boost[] = {
724         {    0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB },
725         {  370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB },
726         {  740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB },
727         { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB },
728         { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB },
729         { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB },
730         { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB },
731         { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB },
732         { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB },
733         { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB },
734         { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB },
735         { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB },
736         { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB },
737         { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB },
738         { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB },
739         { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB }
740 };
741
742 static const struct reg_value gpr13_tx_atten[] = {
743         {  8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 },
744         {  9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 },
745         { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 },
746         { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 },
747         { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 },
748         { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 },
749 };
750
751 static const struct reg_value gpr13_rx_eq[] = {
752         {  500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB },
753         { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB },
754         { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB },
755         { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB },
756         { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB },
757         { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB },
758         { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB },
759         { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB },
760 };
761
762 static const struct reg_property gpr13_props[] = {
763         {
764                 .name = "fsl,transmit-level-mV",
765                 .values = gpr13_tx_level,
766                 .num_values = ARRAY_SIZE(gpr13_tx_level),
767                 .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V,
768         }, {
769                 .name = "fsl,transmit-boost-mdB",
770                 .values = gpr13_tx_boost,
771                 .num_values = ARRAY_SIZE(gpr13_tx_boost),
772                 .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB,
773         }, {
774                 .name = "fsl,transmit-atten-16ths",
775                 .values = gpr13_tx_atten,
776                 .num_values = ARRAY_SIZE(gpr13_tx_atten),
777                 .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16,
778         }, {
779                 .name = "fsl,receive-eq-mdB",
780                 .values = gpr13_rx_eq,
781                 .num_values = ARRAY_SIZE(gpr13_rx_eq),
782                 .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB,
783         }, {
784                 .name = "fsl,no-spread-spectrum",
785                 .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN,
786                 .set_value = 0,
787         },
788 };
789
790 static u32 imx_ahci_parse_props(struct device *dev,
791                                 const struct reg_property *prop, size_t num)
792 {
793         struct device_node *np = dev->of_node;
794         u32 reg_value = 0;
795         int i, j;
796
797         for (i = 0; i < num; i++, prop++) {
798                 u32 of_val;
799
800                 if (prop->num_values == 0) {
801                         if (of_property_read_bool(np, prop->name))
802                                 reg_value |= prop->set_value;
803                         else
804                                 reg_value |= prop->def_value;
805                         continue;
806                 }
807
808                 if (of_property_read_u32(np, prop->name, &of_val)) {
809                         dev_info(dev, "%s not specified, using %08x\n",
810                                 prop->name, prop->def_value);
811                         reg_value |= prop->def_value;
812                         continue;
813                 }
814
815                 for (j = 0; j < prop->num_values; j++) {
816                         if (prop->values[j].of_value == of_val) {
817                                 dev_info(dev, "%s value %u, using %08x\n",
818                                         prop->name, of_val, prop->values[j].reg_value);
819                                 reg_value |= prop->values[j].reg_value;
820                                 break;
821                         }
822                 }
823
824                 if (j == prop->num_values) {
825                         dev_err(dev, "DT property %s is not a valid value\n",
826                                 prop->name);
827                         reg_value |= prop->def_value;
828                 }
829         }
830
831         return reg_value;
832 }
833
834 static const struct scsi_host_template ahci_platform_sht = {
835         AHCI_SHT(DRV_NAME),
836 };
837
838 static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv)
839 {
840         imxpriv->sata_phy = devm_phy_get(dev, "sata-phy");
841         if (IS_ERR(imxpriv->sata_phy))
842                 return dev_err_probe(dev, PTR_ERR(imxpriv->sata_phy),
843                                      "Failed to get sata_phy\n");
844
845         imxpriv->cali_phy0 = devm_phy_get(dev, "cali-phy0");
846         if (IS_ERR(imxpriv->cali_phy0))
847                 return dev_err_probe(dev, PTR_ERR(imxpriv->cali_phy0),
848                                      "Failed to get cali_phy0\n");
849         imxpriv->cali_phy1 = devm_phy_get(dev, "cali-phy1");
850         if (IS_ERR(imxpriv->cali_phy1))
851                 return dev_err_probe(dev, PTR_ERR(imxpriv->cali_phy1),
852                                      "Failed to get cali_phy1\n");
853         return 0;
854 }
855
856 static int imx_ahci_probe(struct platform_device *pdev)
857 {
858         struct device *dev = &pdev->dev;
859         struct ahci_host_priv *hpriv;
860         struct imx_ahci_priv *imxpriv;
861         unsigned int reg_val;
862         int ret;
863
864         imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
865         if (!imxpriv)
866                 return -ENOMEM;
867
868         imxpriv->ahci_pdev = pdev;
869         imxpriv->no_device = false;
870         imxpriv->first_time = true;
871         imxpriv->type = (enum ahci_imx_type)device_get_match_data(dev);
872
873         imxpriv->sata_clk = devm_clk_get(dev, "sata");
874         if (IS_ERR(imxpriv->sata_clk)) {
875                 dev_err(dev, "can't get sata clock.\n");
876                 return PTR_ERR(imxpriv->sata_clk);
877         }
878
879         imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
880         if (IS_ERR(imxpriv->sata_ref_clk)) {
881                 dev_err(dev, "can't get sata_ref clock.\n");
882                 return PTR_ERR(imxpriv->sata_ref_clk);
883         }
884
885         if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) {
886                 u32 reg_value;
887
888                 imxpriv->gpr = syscon_regmap_lookup_by_compatible(
889                                                         "fsl,imx6q-iomuxc-gpr");
890                 if (IS_ERR(imxpriv->gpr)) {
891                         dev_err(dev,
892                                 "failed to find fsl,imx6q-iomux-gpr regmap\n");
893                         return PTR_ERR(imxpriv->gpr);
894                 }
895
896                 reg_value = imx_ahci_parse_props(dev, gpr13_props,
897                                                  ARRAY_SIZE(gpr13_props));
898
899                 imxpriv->phy_params =
900                                    IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
901                                    IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
902                                    IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
903                                    reg_value;
904         } else if (imxpriv->type == AHCI_IMX8QM) {
905                 ret =  imx8_sata_probe(dev, imxpriv);
906                 if (ret)
907                         return ret;
908         }
909
910         hpriv = ahci_platform_get_resources(pdev, 0);
911         if (IS_ERR(hpriv))
912                 return PTR_ERR(hpriv);
913
914         hpriv->plat_data = imxpriv;
915
916         ret = clk_prepare_enable(imxpriv->sata_clk);
917         if (ret)
918                 return ret;
919
920         if (imxpriv->type == AHCI_IMX53 &&
921             IS_ENABLED(CONFIG_HWMON)) {
922                 /* Add the temperature monitor */
923                 struct device *hwmon_dev;
924
925                 hwmon_dev =
926                         devm_hwmon_device_register_with_groups(dev,
927                                                         "sata_ahci",
928                                                         hpriv,
929                                                         fsl_sata_ahci_groups);
930                 if (IS_ERR(hwmon_dev)) {
931                         ret = PTR_ERR(hwmon_dev);
932                         goto disable_clk;
933                 }
934                 devm_thermal_of_zone_register(hwmon_dev, 0, hwmon_dev,
935                                               &fsl_sata_ahci_of_thermal_ops);
936                 dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev));
937         }
938
939         ret = imx_sata_enable(hpriv);
940         if (ret)
941                 goto disable_clk;
942
943         /*
944          * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL.
945          * Set CAP_SSS (support stagered spin up) and Implement the port0.
946          */
947         reg_val = readl(hpriv->mmio + HOST_CAP);
948         if (!(reg_val & HOST_CAP_SSS)) {
949                 reg_val |= HOST_CAP_SSS;
950                 writel(reg_val, hpriv->mmio + HOST_CAP);
951         }
952         reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
953         if (!(reg_val & 0x1)) {
954                 reg_val |= 0x1;
955                 writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
956         }
957
958         if (imxpriv->type != AHCI_IMX8QM) {
959                 /*
960                  * Get AHB clock rate and configure the vendor specified
961                  * TIMER1MS register on i.MX53, i.MX6Q and i.MX6QP only.
962                  */
963                 imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
964                 if (IS_ERR(imxpriv->ahb_clk)) {
965                         dev_err(dev, "Failed to get ahb clock\n");
966                         ret = PTR_ERR(imxpriv->ahb_clk);
967                         goto disable_sata;
968                 }
969                 reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
970                 writel(reg_val, hpriv->mmio + IMX_TIMER1MS);
971         }
972
973         ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info,
974                                       &ahci_platform_sht);
975         if (ret)
976                 goto disable_sata;
977
978         return 0;
979
980 disable_sata:
981         imx_sata_disable(hpriv);
982 disable_clk:
983         clk_disable_unprepare(imxpriv->sata_clk);
984         return ret;
985 }
986
987 static void ahci_imx_host_stop(struct ata_host *host)
988 {
989         struct ahci_host_priv *hpriv = host->private_data;
990         struct imx_ahci_priv *imxpriv = hpriv->plat_data;
991
992         imx_sata_disable(hpriv);
993         clk_disable_unprepare(imxpriv->sata_clk);
994 }
995
996 #ifdef CONFIG_PM_SLEEP
997 static int imx_ahci_suspend(struct device *dev)
998 {
999         struct ata_host *host = dev_get_drvdata(dev);
1000         struct ahci_host_priv *hpriv = host->private_data;
1001         int ret;
1002
1003         ret = ahci_platform_suspend_host(dev);
1004         if (ret)
1005                 return ret;
1006
1007         imx_sata_disable(hpriv);
1008
1009         return 0;
1010 }
1011
1012 static int imx_ahci_resume(struct device *dev)
1013 {
1014         struct ata_host *host = dev_get_drvdata(dev);
1015         struct ahci_host_priv *hpriv = host->private_data;
1016         int ret;
1017
1018         ret = imx_sata_enable(hpriv);
1019         if (ret)
1020                 return ret;
1021
1022         return ahci_platform_resume_host(dev);
1023 }
1024 #endif
1025
1026 static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
1027
1028 static struct platform_driver imx_ahci_driver = {
1029         .probe = imx_ahci_probe,
1030         .remove = ata_platform_remove_one,
1031         .driver = {
1032                 .name = DRV_NAME,
1033                 .of_match_table = imx_ahci_of_match,
1034                 .pm = &ahci_imx_pm_ops,
1035         },
1036 };
1037 module_platform_driver(imx_ahci_driver);
1038
1039 MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
1040 MODULE_AUTHOR("Richard Zhu <[email protected]>");
1041 MODULE_LICENSE("GPL");
1042 MODULE_ALIAS("platform:" DRV_NAME);
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