]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/ata/ahci_imx.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
HID: usbhid: Add HID_QUIRK_NOGET for Aten CS-1758 KVM switch
[mirror_ubuntu-artful-kernel.git] / drivers / ata / ahci_imx.c
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
33 enum {
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
55 enum ahci_imx_type {
56 AHCI_IMX53,
57 AHCI_IMX6Q,
58 };
59
60 struct 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
72 static int ahci_imx_hotplug;
73 module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
74 MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
75
76 static void ahci_imx_host_stop(struct ata_host *host);
77
78 static 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
103 static 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
124 static 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
162 out:
163 return 0;
164 }
165
166 static 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
186 static 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
217 static 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
270 disable_clk:
271 clk_disable_unprepare(imxpriv->sata_ref_clk);
272 disable_regulator:
273 ahci_platform_disable_regulators(hpriv);
274
275 return ret;
276 }
277
278 static 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
296 static 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
328 static 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
345 static 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
352 static 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
359 static 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 };
364 MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
365
366 struct reg_value {
367 u32 of_value;
368 u32 reg_value;
369 };
370
371 struct 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
379 static 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
414 static 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
433 static 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
442 static 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
453 static 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
481 static 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
525 static struct scsi_host_template ahci_platform_sht = {
526 AHCI_SHT(DRV_NAME),
527 };
528
529 static 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
632 disable_sata:
633 imx_sata_disable(hpriv);
634 disable_clk:
635 clk_disable_unprepare(imxpriv->sata_clk);
636 return ret;
637 }
638
639 static 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
649 static 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
664 static 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
678 static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
679
680 static 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 };
689 module_platform_driver(imx_ahci_driver);
690
691 MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
692 MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>");
693 MODULE_LICENSE("GPL");
694 MODULE_ALIAS("ahci:imx");
Ubuntu Artful kernel mirror