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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * copyright (c) 2013 Freescale Semiconductor, Inc.
4 * Freescale IMX AHCI SATA platform driver
5 *
6 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13#include <linux/ahci_platform.h>
14#include <linux/gpio/consumer.h>
15#include <linux/of_device.h>
16#include <linux/mfd/syscon.h>
17#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
18#include <linux/libata.h>
19#include <linux/hwmon.h>
20#include <linux/hwmon-sysfs.h>
21#include <linux/thermal.h>
22#include "ahci.h"
23
24#define DRV_NAME "ahci-imx"
25
26enum {
27 /* Timer 1-ms Register */
28 IMX_TIMER1MS = 0x00e0,
29 /* Port0 PHY Control Register */
30 IMX_P0PHYCR = 0x0178,
31 IMX_P0PHYCR_TEST_PDDQ = 1 << 20,
32 IMX_P0PHYCR_CR_READ = 1 << 19,
33 IMX_P0PHYCR_CR_WRITE = 1 << 18,
34 IMX_P0PHYCR_CR_CAP_DATA = 1 << 17,
35 IMX_P0PHYCR_CR_CAP_ADDR = 1 << 16,
36 /* Port0 PHY Status Register */
37 IMX_P0PHYSR = 0x017c,
38 IMX_P0PHYSR_CR_ACK = 1 << 18,
39 IMX_P0PHYSR_CR_DATA_OUT = 0xffff << 0,
40 /* Lane0 Output Status Register */
41 IMX_LANE0_OUT_STAT = 0x2003,
42 IMX_LANE0_OUT_STAT_RX_PLL_STATE = 1 << 1,
43 /* Clock Reset Register */
44 IMX_CLOCK_RESET = 0x7f3f,
45 IMX_CLOCK_RESET_RESET = 1 << 0,
46 /* IMX8QM HSIO AHCI definitions */
47 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET = 0x03,
48 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET = 0x09,
49 IMX8QM_SATA_PHY_IMPED_RATIO_85OHM = 0x6c,
50 IMX8QM_LPCG_PHYX2_OFFSET = 0x00000,
51 IMX8QM_CSR_PHYX2_OFFSET = 0x90000,
52 IMX8QM_CSR_PHYX1_OFFSET = 0xa0000,
53 IMX8QM_CSR_PHYX_STTS0_OFFSET = 0x4,
54 IMX8QM_CSR_PCIEA_OFFSET = 0xb0000,
55 IMX8QM_CSR_PCIEB_OFFSET = 0xc0000,
56 IMX8QM_CSR_SATA_OFFSET = 0xd0000,
57 IMX8QM_CSR_PCIE_CTRL2_OFFSET = 0x8,
58 IMX8QM_CSR_MISC_OFFSET = 0xe0000,
59
60 IMX8QM_LPCG_PHYX2_PCLK0_MASK = (0x3 << 16),
61 IMX8QM_LPCG_PHYX2_PCLK1_MASK = (0x3 << 20),
62 IMX8QM_PHY_APB_RSTN_0 = BIT(0),
63 IMX8QM_PHY_MODE_SATA = BIT(19),
64 IMX8QM_PHY_MODE_MASK = (0xf << 17),
65 IMX8QM_PHY_PIPE_RSTN_0 = BIT(24),
66 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0 = BIT(25),
67 IMX8QM_PHY_PIPE_RSTN_1 = BIT(26),
68 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1 = BIT(27),
69 IMX8QM_STTS0_LANE0_TX_PLL_LOCK = BIT(4),
70 IMX8QM_MISC_IOB_RXENA = BIT(0),
71 IMX8QM_MISC_IOB_TXENA = BIT(1),
72 IMX8QM_MISC_PHYX1_EPCS_SEL = BIT(12),
73 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 = BIT(24),
74 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 = BIT(25),
75 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 = BIT(28),
76 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0 = BIT(29),
77 IMX8QM_SATA_CTRL_RESET_N = BIT(12),
78 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N = BIT(7),
79 IMX8QM_CTRL_BUTTON_RST_N = BIT(21),
80 IMX8QM_CTRL_POWER_UP_RST_N = BIT(23),
81 IMX8QM_CTRL_LTSSM_ENABLE = BIT(4),
82};
83
84enum ahci_imx_type {
85 AHCI_IMX53,
86 AHCI_IMX6Q,
87 AHCI_IMX6QP,
88 AHCI_IMX8QM,
89};
90
91struct imx_ahci_priv {
92 struct platform_device *ahci_pdev;
93 enum ahci_imx_type type;
94 struct clk *sata_clk;
95 struct clk *sata_ref_clk;
96 struct clk *ahb_clk;
97 struct clk *epcs_tx_clk;
98 struct clk *epcs_rx_clk;
99 struct clk *phy_apbclk;
100 struct clk *phy_pclk0;
101 struct clk *phy_pclk1;
102 void __iomem *phy_base;
103 struct gpio_desc *clkreq_gpiod;
104 struct regmap *gpr;
105 bool no_device;
106 bool first_time;
107 u32 phy_params;
108 u32 imped_ratio;
109};
110
111static int ahci_imx_hotplug;
112module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
113MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
114
115static void ahci_imx_host_stop(struct ata_host *host);
116
117static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert)
118{
119 int timeout = 10;
120 u32 crval;
121 u32 srval;
122
123 /* Assert or deassert the bit */
124 crval = readl(mmio + IMX_P0PHYCR);
125 if (assert)
126 crval |= bit;
127 else
128 crval &= ~bit;
129 writel(crval, mmio + IMX_P0PHYCR);
130
131 /* Wait for the cr_ack signal */
132 do {
133 srval = readl(mmio + IMX_P0PHYSR);
134 if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK)
135 break;
136 usleep_range(100, 200);
137 } while (--timeout);
138
139 return timeout ? 0 : -ETIMEDOUT;
140}
141
142static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio)
143{
144 u32 crval = addr;
145 int ret;
146
147 /* Supply the address on cr_data_in */
148 writel(crval, mmio + IMX_P0PHYCR);
149
150 /* Assert the cr_cap_addr signal */
151 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true);
152 if (ret)
153 return ret;
154
155 /* Deassert cr_cap_addr */
156 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false);
157 if (ret)
158 return ret;
159
160 return 0;
161}
162
163static int imx_phy_reg_write(u16 val, void __iomem *mmio)
164{
165 u32 crval = val;
166 int ret;
167
168 /* Supply the data on cr_data_in */
169 writel(crval, mmio + IMX_P0PHYCR);
170
171 /* Assert the cr_cap_data signal */
172 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true);
173 if (ret)
174 return ret;
175
176 /* Deassert cr_cap_data */
177 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false);
178 if (ret)
179 return ret;
180
181 if (val & IMX_CLOCK_RESET_RESET) {
182 /*
183 * In case we're resetting the phy, it's unable to acknowledge,
184 * so we return immediately here.
185 */
186 crval |= IMX_P0PHYCR_CR_WRITE;
187 writel(crval, mmio + IMX_P0PHYCR);
188 goto out;
189 }
190
191 /* Assert the cr_write signal */
192 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true);
193 if (ret)
194 return ret;
195
196 /* Deassert cr_write */
197 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false);
198 if (ret)
199 return ret;
200
201out:
202 return 0;
203}
204
205static int imx_phy_reg_read(u16 *val, void __iomem *mmio)
206{
207 int ret;
208
209 /* Assert the cr_read signal */
210 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true);
211 if (ret)
212 return ret;
213
214 /* Capture the data from cr_data_out[] */
215 *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT;
216
217 /* Deassert cr_read */
218 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false);
219 if (ret)
220 return ret;
221
222 return 0;
223}
224
225static int imx_sata_phy_reset(struct ahci_host_priv *hpriv)
226{
227 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
228 void __iomem *mmio = hpriv->mmio;
229 int timeout = 10;
230 u16 val;
231 int ret;
232
233 if (imxpriv->type == AHCI_IMX6QP) {
234 /* 6qp adds the sata reset mechanism, use it for 6qp sata */
235 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
236 IMX6Q_GPR5_SATA_SW_PD, 0);
237
238 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
239 IMX6Q_GPR5_SATA_SW_RST, 0);
240 udelay(50);
241 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
242 IMX6Q_GPR5_SATA_SW_RST,
243 IMX6Q_GPR5_SATA_SW_RST);
244 return 0;
245 }
246
247 /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */
248 ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio);
249 if (ret)
250 return ret;
251 ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio);
252 if (ret)
253 return ret;
254
255 /* Wait for PHY RX_PLL to be stable */
256 do {
257 usleep_range(100, 200);
258 ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio);
259 if (ret)
260 return ret;
261 ret = imx_phy_reg_read(&val, mmio);
262 if (ret)
263 return ret;
264 if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE)
265 break;
266 } while (--timeout);
267
268 return timeout ? 0 : -ETIMEDOUT;
269}
270
271enum {
272 /* SATA PHY Register */
273 SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT = 0x0001,
274 SATA_PHY_CR_CLOCK_DAC_CTL = 0x0008,
275 SATA_PHY_CR_CLOCK_RTUNE_CTL = 0x0009,
276 SATA_PHY_CR_CLOCK_ADC_OUT = 0x000A,
277 SATA_PHY_CR_CLOCK_MPLL_TST = 0x0017,
278};
279
280static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio)
281{
282 u16 adc_out_reg, read_sum;
283 u32 index, read_attempt;
284 const u32 attempt_limit = 200;
285
286 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
287 imx_phy_reg_write(rtune_ctl_reg, mmio);
288
289 /* two dummy read */
290 index = 0;
291 read_attempt = 0;
292 adc_out_reg = 0;
293 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_ADC_OUT, mmio);
294 while (index < 2) {
295 imx_phy_reg_read(&adc_out_reg, mmio);
296 /* check if valid */
297 if (adc_out_reg & 0x400)
298 index++;
299
300 read_attempt++;
301 if (read_attempt > attempt_limit) {
302 dev_err(dev, "Read REG more than %d times!\n",
303 attempt_limit);
304 break;
305 }
306 }
307
308 index = 0;
309 read_attempt = 0;
310 read_sum = 0;
311 while (index < 80) {
312 imx_phy_reg_read(&adc_out_reg, mmio);
313 if (adc_out_reg & 0x400) {
314 read_sum = read_sum + (adc_out_reg & 0x3FF);
315 index++;
316 }
317 read_attempt++;
318 if (read_attempt > attempt_limit) {
319 dev_err(dev, "Read REG more than %d times!\n",
320 attempt_limit);
321 break;
322 }
323 }
324
325 /* Use the U32 to make 1000 precision */
326 return (read_sum * 1000) / 80;
327}
328
329/* SATA AHCI temperature monitor */
330static int __sata_ahci_read_temperature(void *dev, int *temp)
331{
332 u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum;
333 u32 str1, str2, str3, str4;
334 int m1, m2, a;
335 struct ahci_host_priv *hpriv = dev_get_drvdata(dev);
336 void __iomem *mmio = hpriv->mmio;
337
338 /* check rd-wr to reg */
339 read_sum = 0;
340 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT, mmio);
341 imx_phy_reg_write(read_sum, mmio);
342 imx_phy_reg_read(&read_sum, mmio);
343 if ((read_sum & 0xffff) != 0)
344 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
345
346 imx_phy_reg_write(0x5A5A, mmio);
347 imx_phy_reg_read(&read_sum, mmio);
348 if ((read_sum & 0xffff) != 0x5A5A)
349 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
350
351 imx_phy_reg_write(0x1234, mmio);
352 imx_phy_reg_read(&read_sum, mmio);
353 if ((read_sum & 0xffff) != 0x1234)
354 dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
355
356 /* start temperature test */
357 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
358 imx_phy_reg_read(&mpll_test_reg, mmio);
359 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
360 imx_phy_reg_read(&rtune_ctl_reg, mmio);
361 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
362 imx_phy_reg_read(&dac_ctl_reg, mmio);
363
364 /* mpll_tst.meas_iv ([12:2]) */
365 str1 = (mpll_test_reg >> 2) & 0x7FF;
366 /* rtune_ctl.mode ([1:0]) */
367 str2 = (rtune_ctl_reg) & 0x3;
368 /* dac_ctl.dac_mode ([14:12]) */
369 str3 = (dac_ctl_reg >> 12) & 0x7;
370 /* rtune_ctl.sel_atbp ([4]) */
371 str4 = (rtune_ctl_reg >> 4);
372
373 /* Calculate the m1 */
374 /* mpll_tst.meas_iv */
375 mpll_test_reg = (mpll_test_reg & 0xE03) | (512) << 2;
376 /* rtune_ctl.mode */
377 rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (1);
378 /* dac_ctl.dac_mode */
379 dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (4) << 12;
380 /* rtune_ctl.sel_atbp */
381 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (0) << 4;
382 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
383 imx_phy_reg_write(mpll_test_reg, mmio);
384 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
385 imx_phy_reg_write(dac_ctl_reg, mmio);
386 m1 = read_adc_sum(dev, rtune_ctl_reg, mmio);
387
388 /* Calculate the m2 */
389 /* rtune_ctl.sel_atbp */
390 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (1) << 4;
391 m2 = read_adc_sum(dev, rtune_ctl_reg, mmio);
392
393 /* restore the status */
394 /* mpll_tst.meas_iv */
395 mpll_test_reg = (mpll_test_reg & 0xE03) | (str1) << 2;
396 /* rtune_ctl.mode */
397 rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (str2);
398 /* dac_ctl.dac_mode */
399 dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (str3) << 12;
400 /* rtune_ctl.sel_atbp */
401 rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (str4) << 4;
402
403 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
404 imx_phy_reg_write(mpll_test_reg, mmio);
405 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
406 imx_phy_reg_write(dac_ctl_reg, mmio);
407 imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
408 imx_phy_reg_write(rtune_ctl_reg, mmio);
409
410 /* Compute temperature */
411 if (!(m2 / 1000))
412 m2 = 1000;
413 a = (m2 - m1) / (m2/1000);
414 *temp = ((-559) * a * a) / 1000 + (1379) * a + (-458000);
415
416 return 0;
417}
418
419static int sata_ahci_read_temperature(struct thermal_zone_device *tz, int *temp)
420{
421 return __sata_ahci_read_temperature(tz->devdata, temp);
422}
423
424static ssize_t sata_ahci_show_temp(struct device *dev,
425 struct device_attribute *da,
426 char *buf)
427{
428 unsigned int temp = 0;
429 int err;
430
431 err = __sata_ahci_read_temperature(dev, &temp);
432 if (err < 0)
433 return err;
434
435 return sprintf(buf, "%u\n", temp);
436}
437
438static const struct thermal_zone_device_ops fsl_sata_ahci_of_thermal_ops = {
439 .get_temp = sata_ahci_read_temperature,
440};
441
442static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sata_ahci_show_temp, NULL, 0);
443
444static struct attribute *fsl_sata_ahci_attrs[] = {
445 &sensor_dev_attr_temp1_input.dev_attr.attr,
446 NULL
447};
448ATTRIBUTE_GROUPS(fsl_sata_ahci);
449
450static int imx8_sata_enable(struct ahci_host_priv *hpriv)
451{
452 u32 val, reg;
453 int i, ret;
454 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
455 struct device *dev = &imxpriv->ahci_pdev->dev;
456
457 /* configure the hsio for sata */
458 ret = clk_prepare_enable(imxpriv->phy_pclk0);
459 if (ret < 0) {
460 dev_err(dev, "can't enable phy_pclk0.\n");
461 return ret;
462 }
463 ret = clk_prepare_enable(imxpriv->phy_pclk1);
464 if (ret < 0) {
465 dev_err(dev, "can't enable phy_pclk1.\n");
466 goto disable_phy_pclk0;
467 }
468 ret = clk_prepare_enable(imxpriv->epcs_tx_clk);
469 if (ret < 0) {
470 dev_err(dev, "can't enable epcs_tx_clk.\n");
471 goto disable_phy_pclk1;
472 }
473 ret = clk_prepare_enable(imxpriv->epcs_rx_clk);
474 if (ret < 0) {
475 dev_err(dev, "can't enable epcs_rx_clk.\n");
476 goto disable_epcs_tx_clk;
477 }
478 ret = clk_prepare_enable(imxpriv->phy_apbclk);
479 if (ret < 0) {
480 dev_err(dev, "can't enable phy_apbclk.\n");
481 goto disable_epcs_rx_clk;
482 }
483 /* Configure PHYx2 PIPE_RSTN */
484 regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEA_OFFSET +
485 IMX8QM_CSR_PCIE_CTRL2_OFFSET, &val);
486 if ((val & IMX8QM_CTRL_LTSSM_ENABLE) == 0) {
487 /* The link of the PCIEA of HSIO is down */
488 regmap_update_bits(imxpriv->gpr,
489 IMX8QM_CSR_PHYX2_OFFSET,
490 IMX8QM_PHY_PIPE_RSTN_0 |
491 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0,
492 IMX8QM_PHY_PIPE_RSTN_0 |
493 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0);
494 }
495 regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEB_OFFSET +
496 IMX8QM_CSR_PCIE_CTRL2_OFFSET, ®);
497 if ((reg & IMX8QM_CTRL_LTSSM_ENABLE) == 0) {
498 /* The link of the PCIEB of HSIO is down */
499 regmap_update_bits(imxpriv->gpr,
500 IMX8QM_CSR_PHYX2_OFFSET,
501 IMX8QM_PHY_PIPE_RSTN_1 |
502 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1,
503 IMX8QM_PHY_PIPE_RSTN_1 |
504 IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1);
505 }
506 if (((reg | val) & IMX8QM_CTRL_LTSSM_ENABLE) == 0) {
507 /* The links of both PCIA and PCIEB of HSIO are down */
508 regmap_update_bits(imxpriv->gpr,
509 IMX8QM_LPCG_PHYX2_OFFSET,
510 IMX8QM_LPCG_PHYX2_PCLK0_MASK |
511 IMX8QM_LPCG_PHYX2_PCLK1_MASK,
512 0);
513 }
514
515 /* set PWR_RST and BT_RST of csr_pciea */
516 val = IMX8QM_CSR_PCIEA_OFFSET + IMX8QM_CSR_PCIE_CTRL2_OFFSET;
517 regmap_update_bits(imxpriv->gpr,
518 val,
519 IMX8QM_CTRL_BUTTON_RST_N,
520 IMX8QM_CTRL_BUTTON_RST_N);
521 regmap_update_bits(imxpriv->gpr,
522 val,
523 IMX8QM_CTRL_POWER_UP_RST_N,
524 IMX8QM_CTRL_POWER_UP_RST_N);
525
526 /* PHYX1_MODE to SATA */
527 regmap_update_bits(imxpriv->gpr,
528 IMX8QM_CSR_PHYX1_OFFSET,
529 IMX8QM_PHY_MODE_MASK,
530 IMX8QM_PHY_MODE_SATA);
531
532 /*
533 * BIT0 RXENA 1, BIT1 TXENA 0
534 * BIT12 PHY_X1_EPCS_SEL 1.
535 */
536 regmap_update_bits(imxpriv->gpr,
537 IMX8QM_CSR_MISC_OFFSET,
538 IMX8QM_MISC_IOB_RXENA,
539 IMX8QM_MISC_IOB_RXENA);
540 regmap_update_bits(imxpriv->gpr,
541 IMX8QM_CSR_MISC_OFFSET,
542 IMX8QM_MISC_IOB_TXENA,
543 0);
544 regmap_update_bits(imxpriv->gpr,
545 IMX8QM_CSR_MISC_OFFSET,
546 IMX8QM_MISC_PHYX1_EPCS_SEL,
547 IMX8QM_MISC_PHYX1_EPCS_SEL);
548 /*
549 * It is possible, for PCIe and SATA are sharing
550 * the same clock source, HPLL or external oscillator.
551 * When PCIe is in low power modes (L1.X or L2 etc),
552 * the clock source can be turned off. In this case,
553 * if this clock source is required to be toggling by
554 * SATA, then SATA functions will be abnormal.
555 * Set the override here to avoid it.
556 */
557 regmap_update_bits(imxpriv->gpr,
558 IMX8QM_CSR_MISC_OFFSET,
559 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 |
560 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 |
561 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 |
562 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0,
563 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 |
564 IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 |
565 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 |
566 IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0);
567
568 /* clear PHY RST, then set it */
569 regmap_update_bits(imxpriv->gpr,
570 IMX8QM_CSR_SATA_OFFSET,
571 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N,
572 0);
573
574 regmap_update_bits(imxpriv->gpr,
575 IMX8QM_CSR_SATA_OFFSET,
576 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N,
577 IMX8QM_SATA_CTRL_EPCS_PHYRESET_N);
578
579 /* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */
580 regmap_update_bits(imxpriv->gpr,
581 IMX8QM_CSR_SATA_OFFSET,
582 IMX8QM_SATA_CTRL_RESET_N,
583 IMX8QM_SATA_CTRL_RESET_N);
584 udelay(1);
585 regmap_update_bits(imxpriv->gpr,
586 IMX8QM_CSR_SATA_OFFSET,
587 IMX8QM_SATA_CTRL_RESET_N,
588 0);
589 regmap_update_bits(imxpriv->gpr,
590 IMX8QM_CSR_SATA_OFFSET,
591 IMX8QM_SATA_CTRL_RESET_N,
592 IMX8QM_SATA_CTRL_RESET_N);
593
594 /* APB reset */
595 regmap_update_bits(imxpriv->gpr,
596 IMX8QM_CSR_PHYX1_OFFSET,
597 IMX8QM_PHY_APB_RSTN_0,
598 IMX8QM_PHY_APB_RSTN_0);
599
600 for (i = 0; i < 100; i++) {
601 reg = IMX8QM_CSR_PHYX1_OFFSET +
602 IMX8QM_CSR_PHYX_STTS0_OFFSET;
603 regmap_read(imxpriv->gpr, reg, &val);
604 val &= IMX8QM_STTS0_LANE0_TX_PLL_LOCK;
605 if (val == IMX8QM_STTS0_LANE0_TX_PLL_LOCK)
606 break;
607 udelay(1);
608 }
609
610 if (val != IMX8QM_STTS0_LANE0_TX_PLL_LOCK) {
611 dev_err(dev, "TX PLL of the PHY is not locked\n");
612 ret = -ENODEV;
613 } else {
614 writeb(imxpriv->imped_ratio, imxpriv->phy_base +
615 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET);
616 writeb(imxpriv->imped_ratio, imxpriv->phy_base +
617 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET);
618 reg = readb(imxpriv->phy_base +
619 IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET);
620 if (unlikely(reg != imxpriv->imped_ratio))
621 dev_info(dev, "Can't set PHY RX impedance ratio.\n");
622 reg = readb(imxpriv->phy_base +
623 IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET);
624 if (unlikely(reg != imxpriv->imped_ratio))
625 dev_info(dev, "Can't set PHY TX impedance ratio.\n");
626 usleep_range(50, 100);
627
628 /*
629 * To reduce the power consumption, gate off
630 * the PHY clks
631 */
632 clk_disable_unprepare(imxpriv->phy_apbclk);
633 clk_disable_unprepare(imxpriv->phy_pclk1);
634 clk_disable_unprepare(imxpriv->phy_pclk0);
635 return ret;
636 }
637
638 clk_disable_unprepare(imxpriv->phy_apbclk);
639disable_epcs_rx_clk:
640 clk_disable_unprepare(imxpriv->epcs_rx_clk);
641disable_epcs_tx_clk:
642 clk_disable_unprepare(imxpriv->epcs_tx_clk);
643disable_phy_pclk1:
644 clk_disable_unprepare(imxpriv->phy_pclk1);
645disable_phy_pclk0:
646 clk_disable_unprepare(imxpriv->phy_pclk0);
647
648 return ret;
649}
650
651static int imx_sata_enable(struct ahci_host_priv *hpriv)
652{
653 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
654 struct device *dev = &imxpriv->ahci_pdev->dev;
655 int ret;
656
657 if (imxpriv->no_device)
658 return 0;
659
660 ret = ahci_platform_enable_regulators(hpriv);
661 if (ret)
662 return ret;
663
664 ret = clk_prepare_enable(imxpriv->sata_ref_clk);
665 if (ret < 0)
666 goto disable_regulator;
667
668 if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) {
669 /*
670 * set PHY Paremeters, two steps to configure the GPR13,
671 * one write for rest of parameters, mask of first write
672 * is 0x07ffffff, and the other one write for setting
673 * the mpll_clk_en.
674 */
675 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
676 IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK |
677 IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK |
678 IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK |
679 IMX6Q_GPR13_SATA_SPD_MODE_MASK |
680 IMX6Q_GPR13_SATA_MPLL_SS_EN |
681 IMX6Q_GPR13_SATA_TX_ATTEN_MASK |
682 IMX6Q_GPR13_SATA_TX_BOOST_MASK |
683 IMX6Q_GPR13_SATA_TX_LVL_MASK |
684 IMX6Q_GPR13_SATA_MPLL_CLK_EN |
685 IMX6Q_GPR13_SATA_TX_EDGE_RATE,
686 imxpriv->phy_params);
687 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
688 IMX6Q_GPR13_SATA_MPLL_CLK_EN,
689 IMX6Q_GPR13_SATA_MPLL_CLK_EN);
690
691 usleep_range(100, 200);
692
693 ret = imx_sata_phy_reset(hpriv);
694 if (ret) {
695 dev_err(dev, "failed to reset phy: %d\n", ret);
696 goto disable_clk;
697 }
698 } else if (imxpriv->type == AHCI_IMX8QM) {
699 ret = imx8_sata_enable(hpriv);
700 }
701
702 usleep_range(1000, 2000);
703
704 return 0;
705
706disable_clk:
707 clk_disable_unprepare(imxpriv->sata_ref_clk);
708disable_regulator:
709 ahci_platform_disable_regulators(hpriv);
710
711 return ret;
712}
713
714static void imx_sata_disable(struct ahci_host_priv *hpriv)
715{
716 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
717
718 if (imxpriv->no_device)
719 return;
720
721 switch (imxpriv->type) {
722 case AHCI_IMX6QP:
723 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
724 IMX6Q_GPR5_SATA_SW_PD,
725 IMX6Q_GPR5_SATA_SW_PD);
726 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
727 IMX6Q_GPR13_SATA_MPLL_CLK_EN,
728 !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
729 break;
730
731 case AHCI_IMX6Q:
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_IMX8QM:
738 clk_disable_unprepare(imxpriv->epcs_rx_clk);
739 clk_disable_unprepare(imxpriv->epcs_tx_clk);
740 break;
741
742 default:
743 break;
744 }
745
746 clk_disable_unprepare(imxpriv->sata_ref_clk);
747
748 ahci_platform_disable_regulators(hpriv);
749}
750
751static void ahci_imx_error_handler(struct ata_port *ap)
752{
753 u32 reg_val;
754 struct ata_device *dev;
755 struct ata_host *host = dev_get_drvdata(ap->dev);
756 struct ahci_host_priv *hpriv = host->private_data;
757 void __iomem *mmio = hpriv->mmio;
758 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
759
760 ahci_error_handler(ap);
761
762 if (!(imxpriv->first_time) || ahci_imx_hotplug)
763 return;
764
765 imxpriv->first_time = false;
766
767 ata_for_each_dev(dev, &ap->link, ENABLED)
768 return;
769 /*
770 * Disable link to save power. An imx ahci port can't be recovered
771 * without full reset once the pddq mode is enabled making it
772 * impossible to use as part of libata LPM.
773 */
774 reg_val = readl(mmio + IMX_P0PHYCR);
775 writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR);
776 imx_sata_disable(hpriv);
777 imxpriv->no_device = true;
778
779 dev_info(ap->dev, "no device found, disabling link.\n");
780 dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n");
781}
782
783static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,
784 unsigned long deadline)
785{
786 struct ata_port *ap = link->ap;
787 struct ata_host *host = dev_get_drvdata(ap->dev);
788 struct ahci_host_priv *hpriv = host->private_data;
789 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
790 int ret;
791
792 if (imxpriv->type == AHCI_IMX53)
793 ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline);
794 else
795 ret = ahci_ops.softreset(link, class, deadline);
796
797 return ret;
798}
799
800static struct ata_port_operations ahci_imx_ops = {
801 .inherits = &ahci_ops,
802 .host_stop = ahci_imx_host_stop,
803 .error_handler = ahci_imx_error_handler,
804 .softreset = ahci_imx_softreset,
805};
806
807static const struct ata_port_info ahci_imx_port_info = {
808 .flags = AHCI_FLAG_COMMON,
809 .pio_mask = ATA_PIO4,
810 .udma_mask = ATA_UDMA6,
811 .port_ops = &ahci_imx_ops,
812};
813
814static const struct of_device_id imx_ahci_of_match[] = {
815 { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 },
816 { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q },
817 { .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP },
818 { .compatible = "fsl,imx8qm-ahci", .data = (void *)AHCI_IMX8QM },
819 { /* sentinel */ }
820};
821MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
822
823struct reg_value {
824 u32 of_value;
825 u32 reg_value;
826};
827
828struct reg_property {
829 const char *name;
830 const struct reg_value *values;
831 size_t num_values;
832 u32 def_value;
833 u32 set_value;
834};
835
836static const struct reg_value gpr13_tx_level[] = {
837 { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V },
838 { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V },
839 { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V },
840 { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V },
841 { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V },
842 { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V },
843 { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V },
844 { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V },
845 { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V },
846 { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V },
847 { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V },
848 { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V },
849 { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V },
850 { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V },
851 { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V },
852 { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V },
853 { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V },
854 { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V },
855 { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V },
856 { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V },
857 { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V },
858 { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V },
859 { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V },
860 { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V },
861 { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V },
862 { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V },
863 { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V },
864 { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V },
865 { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V },
866 { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V },
867 { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V },
868 { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V }
869};
870
871static const struct reg_value gpr13_tx_boost[] = {
872 { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB },
873 { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB },
874 { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB },
875 { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB },
876 { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB },
877 { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB },
878 { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB },
879 { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB },
880 { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB },
881 { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB },
882 { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB },
883 { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB },
884 { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB },
885 { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB },
886 { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB },
887 { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB }
888};
889
890static const struct reg_value gpr13_tx_atten[] = {
891 { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 },
892 { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 },
893 { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 },
894 { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 },
895 { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 },
896 { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 },
897};
898
899static const struct reg_value gpr13_rx_eq[] = {
900 { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB },
901 { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB },
902 { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB },
903 { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB },
904 { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB },
905 { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB },
906 { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB },
907 { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB },
908};
909
910static const struct reg_property gpr13_props[] = {
911 {
912 .name = "fsl,transmit-level-mV",
913 .values = gpr13_tx_level,
914 .num_values = ARRAY_SIZE(gpr13_tx_level),
915 .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V,
916 }, {
917 .name = "fsl,transmit-boost-mdB",
918 .values = gpr13_tx_boost,
919 .num_values = ARRAY_SIZE(gpr13_tx_boost),
920 .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB,
921 }, {
922 .name = "fsl,transmit-atten-16ths",
923 .values = gpr13_tx_atten,
924 .num_values = ARRAY_SIZE(gpr13_tx_atten),
925 .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16,
926 }, {
927 .name = "fsl,receive-eq-mdB",
928 .values = gpr13_rx_eq,
929 .num_values = ARRAY_SIZE(gpr13_rx_eq),
930 .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB,
931 }, {
932 .name = "fsl,no-spread-spectrum",
933 .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN,
934 .set_value = 0,
935 },
936};
937
938static u32 imx_ahci_parse_props(struct device *dev,
939 const struct reg_property *prop, size_t num)
940{
941 struct device_node *np = dev->of_node;
942 u32 reg_value = 0;
943 int i, j;
944
945 for (i = 0; i < num; i++, prop++) {
946 u32 of_val;
947
948 if (prop->num_values == 0) {
949 if (of_property_read_bool(np, prop->name))
950 reg_value |= prop->set_value;
951 else
952 reg_value |= prop->def_value;
953 continue;
954 }
955
956 if (of_property_read_u32(np, prop->name, &of_val)) {
957 dev_info(dev, "%s not specified, using %08x\n",
958 prop->name, prop->def_value);
959 reg_value |= prop->def_value;
960 continue;
961 }
962
963 for (j = 0; j < prop->num_values; j++) {
964 if (prop->values[j].of_value == of_val) {
965 dev_info(dev, "%s value %u, using %08x\n",
966 prop->name, of_val, prop->values[j].reg_value);
967 reg_value |= prop->values[j].reg_value;
968 break;
969 }
970 }
971
972 if (j == prop->num_values) {
973 dev_err(dev, "DT property %s is not a valid value\n",
974 prop->name);
975 reg_value |= prop->def_value;
976 }
977 }
978
979 return reg_value;
980}
981
982static struct scsi_host_template ahci_platform_sht = {
983 AHCI_SHT(DRV_NAME),
984};
985
986static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv)
987{
988 struct resource *phy_res;
989 struct platform_device *pdev = imxpriv->ahci_pdev;
990 struct device_node *np = dev->of_node;
991
992 if (of_property_read_u32(np, "fsl,phy-imp", &imxpriv->imped_ratio))
993 imxpriv->imped_ratio = IMX8QM_SATA_PHY_IMPED_RATIO_85OHM;
994 phy_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
995 if (phy_res) {
996 imxpriv->phy_base = devm_ioremap(dev, phy_res->start,
997 resource_size(phy_res));
998 if (!imxpriv->phy_base) {
999 dev_err(dev, "error with ioremap\n");
1000 return -ENOMEM;
1001 }
1002 } else {
1003 dev_err(dev, "missing *phy* reg region.\n");
1004 return -ENOMEM;
1005 }
1006 imxpriv->gpr =
1007 syscon_regmap_lookup_by_phandle(np, "hsio");
1008 if (IS_ERR(imxpriv->gpr)) {
1009 dev_err(dev, "unable to find gpr registers\n");
1010 return PTR_ERR(imxpriv->gpr);
1011 }
1012
1013 imxpriv->epcs_tx_clk = devm_clk_get(dev, "epcs_tx");
1014 if (IS_ERR(imxpriv->epcs_tx_clk)) {
1015 dev_err(dev, "can't get epcs_tx_clk clock.\n");
1016 return PTR_ERR(imxpriv->epcs_tx_clk);
1017 }
1018 imxpriv->epcs_rx_clk = devm_clk_get(dev, "epcs_rx");
1019 if (IS_ERR(imxpriv->epcs_rx_clk)) {
1020 dev_err(dev, "can't get epcs_rx_clk clock.\n");
1021 return PTR_ERR(imxpriv->epcs_rx_clk);
1022 }
1023 imxpriv->phy_pclk0 = devm_clk_get(dev, "phy_pclk0");
1024 if (IS_ERR(imxpriv->phy_pclk0)) {
1025 dev_err(dev, "can't get phy_pclk0 clock.\n");
1026 return PTR_ERR(imxpriv->phy_pclk0);
1027 }
1028 imxpriv->phy_pclk1 = devm_clk_get(dev, "phy_pclk1");
1029 if (IS_ERR(imxpriv->phy_pclk1)) {
1030 dev_err(dev, "can't get phy_pclk1 clock.\n");
1031 return PTR_ERR(imxpriv->phy_pclk1);
1032 }
1033 imxpriv->phy_apbclk = devm_clk_get(dev, "phy_apbclk");
1034 if (IS_ERR(imxpriv->phy_apbclk)) {
1035 dev_err(dev, "can't get phy_apbclk clock.\n");
1036 return PTR_ERR(imxpriv->phy_apbclk);
1037 }
1038
1039 /* Fetch GPIO, then enable the external OSC */
1040 imxpriv->clkreq_gpiod = devm_gpiod_get_optional(dev, "clkreq",
1041 GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
1042 if (IS_ERR(imxpriv->clkreq_gpiod))
1043 return PTR_ERR(imxpriv->clkreq_gpiod);
1044 if (imxpriv->clkreq_gpiod)
1045 gpiod_set_consumer_name(imxpriv->clkreq_gpiod, "SATA CLKREQ");
1046
1047 return 0;
1048}
1049
1050static int imx_ahci_probe(struct platform_device *pdev)
1051{
1052 struct device *dev = &pdev->dev;
1053 const struct of_device_id *of_id;
1054 struct ahci_host_priv *hpriv;
1055 struct imx_ahci_priv *imxpriv;
1056 unsigned int reg_val;
1057 int ret;
1058
1059 of_id = of_match_device(imx_ahci_of_match, dev);
1060 if (!of_id)
1061 return -EINVAL;
1062
1063 imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
1064 if (!imxpriv)
1065 return -ENOMEM;
1066
1067 imxpriv->ahci_pdev = pdev;
1068 imxpriv->no_device = false;
1069 imxpriv->first_time = true;
1070 imxpriv->type = (unsigned long)of_id->data;
1071
1072 imxpriv->sata_clk = devm_clk_get(dev, "sata");
1073 if (IS_ERR(imxpriv->sata_clk)) {
1074 dev_err(dev, "can't get sata clock.\n");
1075 return PTR_ERR(imxpriv->sata_clk);
1076 }
1077
1078 imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
1079 if (IS_ERR(imxpriv->sata_ref_clk)) {
1080 dev_err(dev, "can't get sata_ref clock.\n");
1081 return PTR_ERR(imxpriv->sata_ref_clk);
1082 }
1083
1084 imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
1085 if (IS_ERR(imxpriv->ahb_clk)) {
1086 dev_err(dev, "can't get ahb clock.\n");
1087 return PTR_ERR(imxpriv->ahb_clk);
1088 }
1089
1090 if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) {
1091 u32 reg_value;
1092
1093 imxpriv->gpr = syscon_regmap_lookup_by_compatible(
1094 "fsl,imx6q-iomuxc-gpr");
1095 if (IS_ERR(imxpriv->gpr)) {
1096 dev_err(dev,
1097 "failed to find fsl,imx6q-iomux-gpr regmap\n");
1098 return PTR_ERR(imxpriv->gpr);
1099 }
1100
1101 reg_value = imx_ahci_parse_props(dev, gpr13_props,
1102 ARRAY_SIZE(gpr13_props));
1103
1104 imxpriv->phy_params =
1105 IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
1106 IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
1107 IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
1108 reg_value;
1109 } else if (imxpriv->type == AHCI_IMX8QM) {
1110 ret = imx8_sata_probe(dev, imxpriv);
1111 if (ret)
1112 return ret;
1113 }
1114
1115 hpriv = ahci_platform_get_resources(pdev, 0);
1116 if (IS_ERR(hpriv))
1117 return PTR_ERR(hpriv);
1118
1119 hpriv->plat_data = imxpriv;
1120
1121 ret = clk_prepare_enable(imxpriv->sata_clk);
1122 if (ret)
1123 return ret;
1124
1125 if (imxpriv->type == AHCI_IMX53 &&
1126 IS_ENABLED(CONFIG_HWMON)) {
1127 /* Add the temperature monitor */
1128 struct device *hwmon_dev;
1129
1130 hwmon_dev =
1131 devm_hwmon_device_register_with_groups(dev,
1132 "sata_ahci",
1133 hpriv,
1134 fsl_sata_ahci_groups);
1135 if (IS_ERR(hwmon_dev)) {
1136 ret = PTR_ERR(hwmon_dev);
1137 goto disable_clk;
1138 }
1139 devm_thermal_of_zone_register(hwmon_dev, 0, hwmon_dev,
1140 &fsl_sata_ahci_of_thermal_ops);
1141 dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev));
1142 }
1143
1144 ret = imx_sata_enable(hpriv);
1145 if (ret)
1146 goto disable_clk;
1147
1148 /*
1149 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
1150 * and IP vendor specific register IMX_TIMER1MS.
1151 * Configure CAP_SSS (support stagered spin up).
1152 * Implement the port0.
1153 * Get the ahb clock rate, and configure the TIMER1MS register.
1154 */
1155 reg_val = readl(hpriv->mmio + HOST_CAP);
1156 if (!(reg_val & HOST_CAP_SSS)) {
1157 reg_val |= HOST_CAP_SSS;
1158 writel(reg_val, hpriv->mmio + HOST_CAP);
1159 }
1160 reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
1161 if (!(reg_val & 0x1)) {
1162 reg_val |= 0x1;
1163 writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
1164 }
1165
1166 reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
1167 writel(reg_val, hpriv->mmio + IMX_TIMER1MS);
1168
1169 ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info,
1170 &ahci_platform_sht);
1171 if (ret)
1172 goto disable_sata;
1173
1174 return 0;
1175
1176disable_sata:
1177 imx_sata_disable(hpriv);
1178disable_clk:
1179 clk_disable_unprepare(imxpriv->sata_clk);
1180 return ret;
1181}
1182
1183static void ahci_imx_host_stop(struct ata_host *host)
1184{
1185 struct ahci_host_priv *hpriv = host->private_data;
1186 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
1187
1188 imx_sata_disable(hpriv);
1189 clk_disable_unprepare(imxpriv->sata_clk);
1190}
1191
1192#ifdef CONFIG_PM_SLEEP
1193static int imx_ahci_suspend(struct device *dev)
1194{
1195 struct ata_host *host = dev_get_drvdata(dev);
1196 struct ahci_host_priv *hpriv = host->private_data;
1197 int ret;
1198
1199 ret = ahci_platform_suspend_host(dev);
1200 if (ret)
1201 return ret;
1202
1203 imx_sata_disable(hpriv);
1204
1205 return 0;
1206}
1207
1208static int imx_ahci_resume(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 = imx_sata_enable(hpriv);
1215 if (ret)
1216 return ret;
1217
1218 return ahci_platform_resume_host(dev);
1219}
1220#endif
1221
1222static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
1223
1224static struct platform_driver imx_ahci_driver = {
1225 .probe = imx_ahci_probe,
1226 .remove = ata_platform_remove_one,
1227 .driver = {
1228 .name = DRV_NAME,
1229 .of_match_table = imx_ahci_of_match,
1230 .pm = &ahci_imx_pm_ops,
1231 },
1232};
1233module_platform_driver(imx_ahci_driver);
1234
1235MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
1236MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>");
1237MODULE_LICENSE("GPL");
1238MODULE_ALIAS("platform:" DRV_NAME);
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/mfd/syscon.h>
27#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
28#include <linux/libata.h>
29#include "ahci.h"
30
31#define DRV_NAME "ahci-imx"
32
33enum {
34 /* Timer 1-ms Register */
35 IMX_TIMER1MS = 0x00e0,
36 /* Port0 PHY Control Register */
37 IMX_P0PHYCR = 0x0178,
38 IMX_P0PHYCR_TEST_PDDQ = 1 << 20,
39 IMX_P0PHYCR_CR_READ = 1 << 19,
40 IMX_P0PHYCR_CR_WRITE = 1 << 18,
41 IMX_P0PHYCR_CR_CAP_DATA = 1 << 17,
42 IMX_P0PHYCR_CR_CAP_ADDR = 1 << 16,
43 /* Port0 PHY Status Register */
44 IMX_P0PHYSR = 0x017c,
45 IMX_P0PHYSR_CR_ACK = 1 << 18,
46 IMX_P0PHYSR_CR_DATA_OUT = 0xffff << 0,
47 /* Lane0 Output Status Register */
48 IMX_LANE0_OUT_STAT = 0x2003,
49 IMX_LANE0_OUT_STAT_RX_PLL_STATE = 1 << 1,
50 /* Clock Reset Register */
51 IMX_CLOCK_RESET = 0x7f3f,
52 IMX_CLOCK_RESET_RESET = 1 << 0,
53};
54
55enum ahci_imx_type {
56 AHCI_IMX53,
57 AHCI_IMX6Q,
58};
59
60struct imx_ahci_priv {
61 struct platform_device *ahci_pdev;
62 enum ahci_imx_type type;
63 struct clk *sata_clk;
64 struct clk *sata_ref_clk;
65 struct clk *ahb_clk;
66 struct regmap *gpr;
67 bool no_device;
68 bool first_time;
69 u32 phy_params;
70};
71
72static int ahci_imx_hotplug;
73module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
74MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
75
76static void ahci_imx_host_stop(struct ata_host *host);
77
78static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert)
79{
80 int timeout = 10;
81 u32 crval;
82 u32 srval;
83
84 /* Assert or deassert the bit */
85 crval = readl(mmio + IMX_P0PHYCR);
86 if (assert)
87 crval |= bit;
88 else
89 crval &= ~bit;
90 writel(crval, mmio + IMX_P0PHYCR);
91
92 /* Wait for the cr_ack signal */
93 do {
94 srval = readl(mmio + IMX_P0PHYSR);
95 if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK)
96 break;
97 usleep_range(100, 200);
98 } while (--timeout);
99
100 return timeout ? 0 : -ETIMEDOUT;
101}
102
103static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio)
104{
105 u32 crval = addr;
106 int ret;
107
108 /* Supply the address on cr_data_in */
109 writel(crval, mmio + IMX_P0PHYCR);
110
111 /* Assert the cr_cap_addr signal */
112 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true);
113 if (ret)
114 return ret;
115
116 /* Deassert cr_cap_addr */
117 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false);
118 if (ret)
119 return ret;
120
121 return 0;
122}
123
124static int imx_phy_reg_write(u16 val, void __iomem *mmio)
125{
126 u32 crval = val;
127 int ret;
128
129 /* Supply the data on cr_data_in */
130 writel(crval, mmio + IMX_P0PHYCR);
131
132 /* Assert the cr_cap_data signal */
133 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true);
134 if (ret)
135 return ret;
136
137 /* Deassert cr_cap_data */
138 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false);
139 if (ret)
140 return ret;
141
142 if (val & IMX_CLOCK_RESET_RESET) {
143 /*
144 * In case we're resetting the phy, it's unable to acknowledge,
145 * so we return immediately here.
146 */
147 crval |= IMX_P0PHYCR_CR_WRITE;
148 writel(crval, mmio + IMX_P0PHYCR);
149 goto out;
150 }
151
152 /* Assert the cr_write signal */
153 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true);
154 if (ret)
155 return ret;
156
157 /* Deassert cr_write */
158 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false);
159 if (ret)
160 return ret;
161
162out:
163 return 0;
164}
165
166static int imx_phy_reg_read(u16 *val, void __iomem *mmio)
167{
168 int ret;
169
170 /* Assert the cr_read signal */
171 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true);
172 if (ret)
173 return ret;
174
175 /* Capture the data from cr_data_out[] */
176 *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT;
177
178 /* Deassert cr_read */
179 ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false);
180 if (ret)
181 return ret;
182
183 return 0;
184}
185
186static int imx_sata_phy_reset(struct ahci_host_priv *hpriv)
187{
188 void __iomem *mmio = hpriv->mmio;
189 int timeout = 10;
190 u16 val;
191 int ret;
192
193 /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */
194 ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio);
195 if (ret)
196 return ret;
197 ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio);
198 if (ret)
199 return ret;
200
201 /* Wait for PHY RX_PLL to be stable */
202 do {
203 usleep_range(100, 200);
204 ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio);
205 if (ret)
206 return ret;
207 ret = imx_phy_reg_read(&val, mmio);
208 if (ret)
209 return ret;
210 if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE)
211 break;
212 } while (--timeout);
213
214 return timeout ? 0 : -ETIMEDOUT;
215}
216
217static int imx_sata_enable(struct ahci_host_priv *hpriv)
218{
219 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
220 struct device *dev = &imxpriv->ahci_pdev->dev;
221 int ret;
222
223 if (imxpriv->no_device)
224 return 0;
225
226 ret = ahci_platform_enable_regulators(hpriv);
227 if (ret)
228 return ret;
229
230 ret = clk_prepare_enable(imxpriv->sata_ref_clk);
231 if (ret < 0)
232 goto disable_regulator;
233
234 if (imxpriv->type == AHCI_IMX6Q) {
235 /*
236 * set PHY Paremeters, two steps to configure the GPR13,
237 * one write for rest of parameters, mask of first write
238 * is 0x07ffffff, and the other one write for setting
239 * the mpll_clk_en.
240 */
241 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
242 IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK |
243 IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK |
244 IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK |
245 IMX6Q_GPR13_SATA_SPD_MODE_MASK |
246 IMX6Q_GPR13_SATA_MPLL_SS_EN |
247 IMX6Q_GPR13_SATA_TX_ATTEN_MASK |
248 IMX6Q_GPR13_SATA_TX_BOOST_MASK |
249 IMX6Q_GPR13_SATA_TX_LVL_MASK |
250 IMX6Q_GPR13_SATA_MPLL_CLK_EN |
251 IMX6Q_GPR13_SATA_TX_EDGE_RATE,
252 imxpriv->phy_params);
253 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
254 IMX6Q_GPR13_SATA_MPLL_CLK_EN,
255 IMX6Q_GPR13_SATA_MPLL_CLK_EN);
256
257 usleep_range(100, 200);
258
259 ret = imx_sata_phy_reset(hpriv);
260 if (ret) {
261 dev_err(dev, "failed to reset phy: %d\n", ret);
262 goto disable_clk;
263 }
264 }
265
266 usleep_range(1000, 2000);
267
268 return 0;
269
270disable_clk:
271 clk_disable_unprepare(imxpriv->sata_ref_clk);
272disable_regulator:
273 ahci_platform_disable_regulators(hpriv);
274
275 return ret;
276}
277
278static void imx_sata_disable(struct ahci_host_priv *hpriv)
279{
280 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
281
282 if (imxpriv->no_device)
283 return;
284
285 if (imxpriv->type == AHCI_IMX6Q) {
286 regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
287 IMX6Q_GPR13_SATA_MPLL_CLK_EN,
288 !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
289 }
290
291 clk_disable_unprepare(imxpriv->sata_ref_clk);
292
293 ahci_platform_disable_regulators(hpriv);
294}
295
296static void ahci_imx_error_handler(struct ata_port *ap)
297{
298 u32 reg_val;
299 struct ata_device *dev;
300 struct ata_host *host = dev_get_drvdata(ap->dev);
301 struct ahci_host_priv *hpriv = host->private_data;
302 void __iomem *mmio = hpriv->mmio;
303 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
304
305 ahci_error_handler(ap);
306
307 if (!(imxpriv->first_time) || ahci_imx_hotplug)
308 return;
309
310 imxpriv->first_time = false;
311
312 ata_for_each_dev(dev, &ap->link, ENABLED)
313 return;
314 /*
315 * Disable link to save power. An imx ahci port can't be recovered
316 * without full reset once the pddq mode is enabled making it
317 * impossible to use as part of libata LPM.
318 */
319 reg_val = readl(mmio + IMX_P0PHYCR);
320 writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR);
321 imx_sata_disable(hpriv);
322 imxpriv->no_device = true;
323
324 dev_info(ap->dev, "no device found, disabling link.\n");
325 dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n");
326}
327
328static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,
329 unsigned long deadline)
330{
331 struct ata_port *ap = link->ap;
332 struct ata_host *host = dev_get_drvdata(ap->dev);
333 struct ahci_host_priv *hpriv = host->private_data;
334 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
335 int ret = -EIO;
336
337 if (imxpriv->type == AHCI_IMX53)
338 ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline);
339 else if (imxpriv->type == AHCI_IMX6Q)
340 ret = ahci_ops.softreset(link, class, deadline);
341
342 return ret;
343}
344
345static struct ata_port_operations ahci_imx_ops = {
346 .inherits = &ahci_ops,
347 .host_stop = ahci_imx_host_stop,
348 .error_handler = ahci_imx_error_handler,
349 .softreset = ahci_imx_softreset,
350};
351
352static const struct ata_port_info ahci_imx_port_info = {
353 .flags = AHCI_FLAG_COMMON,
354 .pio_mask = ATA_PIO4,
355 .udma_mask = ATA_UDMA6,
356 .port_ops = &ahci_imx_ops,
357};
358
359static const struct of_device_id imx_ahci_of_match[] = {
360 { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 },
361 { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q },
362 {},
363};
364MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
365
366struct reg_value {
367 u32 of_value;
368 u32 reg_value;
369};
370
371struct reg_property {
372 const char *name;
373 const struct reg_value *values;
374 size_t num_values;
375 u32 def_value;
376 u32 set_value;
377};
378
379static const struct reg_value gpr13_tx_level[] = {
380 { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V },
381 { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V },
382 { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V },
383 { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V },
384 { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V },
385 { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V },
386 { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V },
387 { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V },
388 { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V },
389 { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V },
390 { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V },
391 { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V },
392 { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V },
393 { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V },
394 { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V },
395 { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V },
396 { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V },
397 { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V },
398 { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V },
399 { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V },
400 { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V },
401 { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V },
402 { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V },
403 { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V },
404 { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V },
405 { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V },
406 { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V },
407 { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V },
408 { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V },
409 { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V },
410 { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V },
411 { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V }
412};
413
414static const struct reg_value gpr13_tx_boost[] = {
415 { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB },
416 { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB },
417 { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB },
418 { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB },
419 { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB },
420 { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB },
421 { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB },
422 { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB },
423 { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB },
424 { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB },
425 { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB },
426 { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB },
427 { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB },
428 { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB },
429 { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB },
430 { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB }
431};
432
433static const struct reg_value gpr13_tx_atten[] = {
434 { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 },
435 { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 },
436 { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 },
437 { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 },
438 { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 },
439 { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 },
440};
441
442static const struct reg_value gpr13_rx_eq[] = {
443 { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB },
444 { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB },
445 { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB },
446 { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB },
447 { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB },
448 { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB },
449 { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB },
450 { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB },
451};
452
453static const struct reg_property gpr13_props[] = {
454 {
455 .name = "fsl,transmit-level-mV",
456 .values = gpr13_tx_level,
457 .num_values = ARRAY_SIZE(gpr13_tx_level),
458 .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V,
459 }, {
460 .name = "fsl,transmit-boost-mdB",
461 .values = gpr13_tx_boost,
462 .num_values = ARRAY_SIZE(gpr13_tx_boost),
463 .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB,
464 }, {
465 .name = "fsl,transmit-atten-16ths",
466 .values = gpr13_tx_atten,
467 .num_values = ARRAY_SIZE(gpr13_tx_atten),
468 .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16,
469 }, {
470 .name = "fsl,receive-eq-mdB",
471 .values = gpr13_rx_eq,
472 .num_values = ARRAY_SIZE(gpr13_rx_eq),
473 .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB,
474 }, {
475 .name = "fsl,no-spread-spectrum",
476 .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN,
477 .set_value = 0,
478 },
479};
480
481static u32 imx_ahci_parse_props(struct device *dev,
482 const struct reg_property *prop, size_t num)
483{
484 struct device_node *np = dev->of_node;
485 u32 reg_value = 0;
486 int i, j;
487
488 for (i = 0; i < num; i++, prop++) {
489 u32 of_val;
490
491 if (prop->num_values == 0) {
492 if (of_property_read_bool(np, prop->name))
493 reg_value |= prop->set_value;
494 else
495 reg_value |= prop->def_value;
496 continue;
497 }
498
499 if (of_property_read_u32(np, prop->name, &of_val)) {
500 dev_info(dev, "%s not specified, using %08x\n",
501 prop->name, prop->def_value);
502 reg_value |= prop->def_value;
503 continue;
504 }
505
506 for (j = 0; j < prop->num_values; j++) {
507 if (prop->values[j].of_value == of_val) {
508 dev_info(dev, "%s value %u, using %08x\n",
509 prop->name, of_val, prop->values[j].reg_value);
510 reg_value |= prop->values[j].reg_value;
511 break;
512 }
513 }
514
515 if (j == prop->num_values) {
516 dev_err(dev, "DT property %s is not a valid value\n",
517 prop->name);
518 reg_value |= prop->def_value;
519 }
520 }
521
522 return reg_value;
523}
524
525static struct scsi_host_template ahci_platform_sht = {
526 AHCI_SHT(DRV_NAME),
527};
528
529static int imx_ahci_probe(struct platform_device *pdev)
530{
531 struct device *dev = &pdev->dev;
532 const struct of_device_id *of_id;
533 struct ahci_host_priv *hpriv;
534 struct imx_ahci_priv *imxpriv;
535 unsigned int reg_val;
536 int ret;
537
538 of_id = of_match_device(imx_ahci_of_match, dev);
539 if (!of_id)
540 return -EINVAL;
541
542 imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
543 if (!imxpriv)
544 return -ENOMEM;
545
546 imxpriv->ahci_pdev = pdev;
547 imxpriv->no_device = false;
548 imxpriv->first_time = true;
549 imxpriv->type = (enum ahci_imx_type)of_id->data;
550
551 imxpriv->sata_clk = devm_clk_get(dev, "sata");
552 if (IS_ERR(imxpriv->sata_clk)) {
553 dev_err(dev, "can't get sata clock.\n");
554 return PTR_ERR(imxpriv->sata_clk);
555 }
556
557 imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
558 if (IS_ERR(imxpriv->sata_ref_clk)) {
559 dev_err(dev, "can't get sata_ref clock.\n");
560 return PTR_ERR(imxpriv->sata_ref_clk);
561 }
562
563 imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
564 if (IS_ERR(imxpriv->ahb_clk)) {
565 dev_err(dev, "can't get ahb clock.\n");
566 return PTR_ERR(imxpriv->ahb_clk);
567 }
568
569 if (imxpriv->type == AHCI_IMX6Q) {
570 u32 reg_value;
571
572 imxpriv->gpr = syscon_regmap_lookup_by_compatible(
573 "fsl,imx6q-iomuxc-gpr");
574 if (IS_ERR(imxpriv->gpr)) {
575 dev_err(dev,
576 "failed to find fsl,imx6q-iomux-gpr regmap\n");
577 return PTR_ERR(imxpriv->gpr);
578 }
579
580 reg_value = imx_ahci_parse_props(dev, gpr13_props,
581 ARRAY_SIZE(gpr13_props));
582
583 imxpriv->phy_params =
584 IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
585 IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
586 IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
587 reg_value;
588 }
589
590 hpriv = ahci_platform_get_resources(pdev);
591 if (IS_ERR(hpriv))
592 return PTR_ERR(hpriv);
593
594 hpriv->plat_data = imxpriv;
595
596 ret = clk_prepare_enable(imxpriv->sata_clk);
597 if (ret)
598 return ret;
599
600 ret = imx_sata_enable(hpriv);
601 if (ret)
602 goto disable_clk;
603
604 /*
605 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
606 * and IP vendor specific register IMX_TIMER1MS.
607 * Configure CAP_SSS (support stagered spin up).
608 * Implement the port0.
609 * Get the ahb clock rate, and configure the TIMER1MS register.
610 */
611 reg_val = readl(hpriv->mmio + HOST_CAP);
612 if (!(reg_val & HOST_CAP_SSS)) {
613 reg_val |= HOST_CAP_SSS;
614 writel(reg_val, hpriv->mmio + HOST_CAP);
615 }
616 reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
617 if (!(reg_val & 0x1)) {
618 reg_val |= 0x1;
619 writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
620 }
621
622 reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
623 writel(reg_val, hpriv->mmio + IMX_TIMER1MS);
624
625 ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info,
626 &ahci_platform_sht);
627 if (ret)
628 goto disable_sata;
629
630 return 0;
631
632disable_sata:
633 imx_sata_disable(hpriv);
634disable_clk:
635 clk_disable_unprepare(imxpriv->sata_clk);
636 return ret;
637}
638
639static void ahci_imx_host_stop(struct ata_host *host)
640{
641 struct ahci_host_priv *hpriv = host->private_data;
642 struct imx_ahci_priv *imxpriv = hpriv->plat_data;
643
644 imx_sata_disable(hpriv);
645 clk_disable_unprepare(imxpriv->sata_clk);
646}
647
648#ifdef CONFIG_PM_SLEEP
649static int imx_ahci_suspend(struct device *dev)
650{
651 struct ata_host *host = dev_get_drvdata(dev);
652 struct ahci_host_priv *hpriv = host->private_data;
653 int ret;
654
655 ret = ahci_platform_suspend_host(dev);
656 if (ret)
657 return ret;
658
659 imx_sata_disable(hpriv);
660
661 return 0;
662}
663
664static int imx_ahci_resume(struct device *dev)
665{
666 struct ata_host *host = dev_get_drvdata(dev);
667 struct ahci_host_priv *hpriv = host->private_data;
668 int ret;
669
670 ret = imx_sata_enable(hpriv);
671 if (ret)
672 return ret;
673
674 return ahci_platform_resume_host(dev);
675}
676#endif
677
678static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
679
680static struct platform_driver imx_ahci_driver = {
681 .probe = imx_ahci_probe,
682 .remove = ata_platform_remove_one,
683 .driver = {
684 .name = DRV_NAME,
685 .of_match_table = imx_ahci_of_match,
686 .pm = &ahci_imx_pm_ops,
687 },
688};
689module_platform_driver(imx_ahci_driver);
690
691MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
692MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>");
693MODULE_LICENSE("GPL");
694MODULE_ALIAS("ahci:imx");