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19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/slab.h>
22#include <linux/phy/phy.h>
23#include <linux/of.h>
24#include <linux/clk.h>
25#include <linux/err.h>
26#include <linux/io.h>
27#include <linux/pm_runtime.h>
28#include <linux/delay.h>
29#include <linux/phy/omap_control_phy.h>
30#include <linux/of_platform.h>
31#include <linux/mfd/syscon.h>
32#include <linux/regmap.h>
33
34#define PLL_STATUS 0x00000004
35#define PLL_GO 0x00000008
36#define PLL_CONFIGURATION1 0x0000000C
37#define PLL_CONFIGURATION2 0x00000010
38#define PLL_CONFIGURATION3 0x00000014
39#define PLL_CONFIGURATION4 0x00000020
40
41#define PLL_REGM_MASK 0x001FFE00
42#define PLL_REGM_SHIFT 0x9
43#define PLL_REGM_F_MASK 0x0003FFFF
44#define PLL_REGM_F_SHIFT 0x0
45#define PLL_REGN_MASK 0x000001FE
46#define PLL_REGN_SHIFT 0x1
47#define PLL_SELFREQDCO_MASK 0x0000000E
48#define PLL_SELFREQDCO_SHIFT 0x1
49#define PLL_SD_MASK 0x0003FC00
50#define PLL_SD_SHIFT 10
51#define SET_PLL_GO 0x1
52#define PLL_LDOPWDN BIT(15)
53#define PLL_TICOPWDN BIT(16)
54#define PLL_LOCK 0x2
55#define PLL_IDLE 0x1
56
57#define SATA_PLL_SOFT_RESET BIT(18)
58
59#define PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000
60#define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14
61
62#define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000
63#define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22
64
65#define PIPE3_PHY_TX_RX_POWERON 0x3
66#define PIPE3_PHY_TX_RX_POWEROFF 0x0
67
68#define PCIE_PCS_MASK 0xFF0000
69#define PCIE_PCS_DELAY_COUNT_SHIFT 0x10
70
71
72
73
74
75
76#define PLL_IDLE_TIME 100
77#define PLL_LOCK_TIME 100
78
79struct pipe3_dpll_params {
80 u16 m;
81 u8 n;
82 u8 freq:3;
83 u8 sd;
84 u32 mf;
85};
86
87struct pipe3_dpll_map {
88 unsigned long rate;
89 struct pipe3_dpll_params params;
90};
91
92struct ti_pipe3 {
93 void __iomem *pll_ctrl_base;
94 struct device *dev;
95 struct device *control_dev;
96 struct clk *wkupclk;
97 struct clk *sys_clk;
98 struct clk *refclk;
99 struct clk *div_clk;
100 struct pipe3_dpll_map *dpll_map;
101 struct regmap *phy_power_syscon;
102 struct regmap *pcs_syscon;
103 struct regmap *dpll_reset_syscon;
104 unsigned int dpll_reset_reg;
105 unsigned int power_reg;
106 unsigned int pcie_pcs_reg;
107 bool sata_refclk_enabled;
108};
109
110static struct pipe3_dpll_map dpll_map_usb[] = {
111 {12000000, {1250, 5, 4, 20, 0} },
112 {16800000, {3125, 20, 4, 20, 0} },
113 {19200000, {1172, 8, 4, 20, 65537} },
114 {20000000, {1000, 7, 4, 10, 0} },
115 {26000000, {1250, 12, 4, 20, 0} },
116 {38400000, {3125, 47, 4, 20, 92843} },
117 { },
118};
119
120static struct pipe3_dpll_map dpll_map_sata[] = {
121 {12000000, {625, 4, 4, 6, 0} },
122 {16800000, {625, 6, 4, 7, 0} },
123 {19200000, {625, 7, 4, 6, 0} },
124 {20000000, {750, 9, 4, 6, 0} },
125 {26000000, {750, 12, 4, 6, 0} },
126 {38400000, {625, 15, 4, 6, 0} },
127 { },
128};
129
130static inline u32 ti_pipe3_readl(void __iomem *addr, unsigned offset)
131{
132 return __raw_readl(addr + offset);
133}
134
135static inline void ti_pipe3_writel(void __iomem *addr, unsigned offset,
136 u32 data)
137{
138 __raw_writel(data, addr + offset);
139}
140
141static struct pipe3_dpll_params *ti_pipe3_get_dpll_params(struct ti_pipe3 *phy)
142{
143 unsigned long rate;
144 struct pipe3_dpll_map *dpll_map = phy->dpll_map;
145
146 rate = clk_get_rate(phy->sys_clk);
147
148 for (; dpll_map->rate; dpll_map++) {
149 if (rate == dpll_map->rate)
150 return &dpll_map->params;
151 }
152
153 dev_err(phy->dev, "No DPLL configuration for %lu Hz SYS CLK\n", rate);
154
155 return NULL;
156}
157
158static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy);
159static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
160
161static int ti_pipe3_power_off(struct phy *x)
162{
163 u32 val;
164 int ret;
165 struct ti_pipe3 *phy = phy_get_drvdata(x);
166
167 if (!phy->phy_power_syscon) {
168 omap_control_phy_power(phy->control_dev, 0);
169 return 0;
170 }
171
172 val = PIPE3_PHY_TX_RX_POWEROFF << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
173
174 ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
175 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val);
176 return ret;
177}
178
179static int ti_pipe3_power_on(struct phy *x)
180{
181 u32 val;
182 u32 mask;
183 int ret;
184 unsigned long rate;
185 struct ti_pipe3 *phy = phy_get_drvdata(x);
186
187 if (!phy->phy_power_syscon) {
188 omap_control_phy_power(phy->control_dev, 1);
189 return 0;
190 }
191
192 rate = clk_get_rate(phy->sys_clk);
193 if (!rate) {
194 dev_err(phy->dev, "Invalid clock rate\n");
195 return -EINVAL;
196 }
197 rate = rate / 1000000;
198 mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
199 OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK;
200 val = PIPE3_PHY_TX_RX_POWERON << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
201 val |= rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
202
203 ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
204 mask, val);
205 return ret;
206}
207
208static int ti_pipe3_dpll_wait_lock(struct ti_pipe3 *phy)
209{
210 u32 val;
211 unsigned long timeout;
212
213 timeout = jiffies + msecs_to_jiffies(PLL_LOCK_TIME);
214 do {
215 cpu_relax();
216 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
217 if (val & PLL_LOCK)
218 return 0;
219 } while (!time_after(jiffies, timeout));
220
221 dev_err(phy->dev, "DPLL failed to lock\n");
222 return -EBUSY;
223}
224
225static int ti_pipe3_dpll_program(struct ti_pipe3 *phy)
226{
227 u32 val;
228 struct pipe3_dpll_params *dpll_params;
229
230 dpll_params = ti_pipe3_get_dpll_params(phy);
231 if (!dpll_params)
232 return -EINVAL;
233
234 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
235 val &= ~PLL_REGN_MASK;
236 val |= dpll_params->n << PLL_REGN_SHIFT;
237 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
238
239 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
240 val &= ~PLL_SELFREQDCO_MASK;
241 val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT;
242 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
243
244 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
245 val &= ~PLL_REGM_MASK;
246 val |= dpll_params->m << PLL_REGM_SHIFT;
247 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
248
249 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4);
250 val &= ~PLL_REGM_F_MASK;
251 val |= dpll_params->mf << PLL_REGM_F_SHIFT;
252 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val);
253
254 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3);
255 val &= ~PLL_SD_MASK;
256 val |= dpll_params->sd << PLL_SD_SHIFT;
257 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val);
258
259 ti_pipe3_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO);
260
261 return ti_pipe3_dpll_wait_lock(phy);
262}
263
264static int ti_pipe3_init(struct phy *x)
265{
266 struct ti_pipe3 *phy = phy_get_drvdata(x);
267 u32 val;
268 int ret = 0;
269
270 ti_pipe3_enable_clocks(phy);
271
272
273
274
275
276 if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) {
277 if (!phy->pcs_syscon) {
278 omap_control_pcie_pcs(phy->control_dev, 0x96);
279 return 0;
280 }
281
282 val = 0x96 << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT;
283 ret = regmap_update_bits(phy->pcs_syscon, phy->pcie_pcs_reg,
284 PCIE_PCS_MASK, val);
285 return ret;
286 }
287
288
289 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
290 if (val & PLL_IDLE) {
291 val &= ~PLL_IDLE;
292 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
293 ret = ti_pipe3_dpll_wait_lock(phy);
294 }
295
296
297 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
298 if ((val & PLL_LOCK) && of_device_is_compatible(phy->dev->of_node,
299 "ti,phy-pipe3-sata"))
300 return ret;
301
302
303 ret = ti_pipe3_dpll_program(phy);
304 if (ret) {
305 ti_pipe3_disable_clocks(phy);
306 return -EINVAL;
307 }
308
309 return ret;
310}
311
312static int ti_pipe3_exit(struct phy *x)
313{
314 struct ti_pipe3 *phy = phy_get_drvdata(x);
315 u32 val;
316 unsigned long timeout;
317
318
319
320
321 if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata") &&
322 !phy->dpll_reset_syscon)
323 return 0;
324
325
326 if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) {
327
328 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
329 val |= PLL_IDLE;
330 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
331
332
333 timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME);
334 do {
335 cpu_relax();
336 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
337 if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN))
338 break;
339 } while (!time_after(jiffies, timeout));
340
341 if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) {
342 dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n",
343 val);
344 return -EBUSY;
345 }
346 }
347
348
349 if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata")) {
350 regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg,
351 SATA_PLL_SOFT_RESET, SATA_PLL_SOFT_RESET);
352 regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg,
353 SATA_PLL_SOFT_RESET, 0);
354 }
355
356 ti_pipe3_disable_clocks(phy);
357
358 return 0;
359}
360static const struct phy_ops ops = {
361 .init = ti_pipe3_init,
362 .exit = ti_pipe3_exit,
363 .power_on = ti_pipe3_power_on,
364 .power_off = ti_pipe3_power_off,
365 .owner = THIS_MODULE,
366};
367
368static const struct of_device_id ti_pipe3_id_table[];
369
370static int ti_pipe3_get_clk(struct ti_pipe3 *phy)
371{
372 struct clk *clk;
373 struct device *dev = phy->dev;
374 struct device_node *node = dev->of_node;
375
376 phy->refclk = devm_clk_get(dev, "refclk");
377 if (IS_ERR(phy->refclk)) {
378 dev_err(dev, "unable to get refclk\n");
379
380
381
382 if (!of_device_is_compatible(node, "ti,phy-pipe3-sata"))
383 return PTR_ERR(phy->refclk);
384 }
385
386 if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
387 phy->wkupclk = devm_clk_get(dev, "wkupclk");
388 if (IS_ERR(phy->wkupclk)) {
389 dev_err(dev, "unable to get wkupclk\n");
390 return PTR_ERR(phy->wkupclk);
391 }
392 } else {
393 phy->wkupclk = ERR_PTR(-ENODEV);
394 }
395
396 if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie") ||
397 phy->phy_power_syscon) {
398 phy->sys_clk = devm_clk_get(dev, "sysclk");
399 if (IS_ERR(phy->sys_clk)) {
400 dev_err(dev, "unable to get sysclk\n");
401 return -EINVAL;
402 }
403 }
404
405 if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
406 clk = devm_clk_get(dev, "dpll_ref");
407 if (IS_ERR(clk)) {
408 dev_err(dev, "unable to get dpll ref clk\n");
409 return PTR_ERR(clk);
410 }
411 clk_set_rate(clk, 1500000000);
412
413 clk = devm_clk_get(dev, "dpll_ref_m2");
414 if (IS_ERR(clk)) {
415 dev_err(dev, "unable to get dpll ref m2 clk\n");
416 return PTR_ERR(clk);
417 }
418 clk_set_rate(clk, 100000000);
419
420 clk = devm_clk_get(dev, "phy-div");
421 if (IS_ERR(clk)) {
422 dev_err(dev, "unable to get phy-div clk\n");
423 return PTR_ERR(clk);
424 }
425 clk_set_rate(clk, 100000000);
426
427 phy->div_clk = devm_clk_get(dev, "div-clk");
428 if (IS_ERR(phy->div_clk)) {
429 dev_err(dev, "unable to get div-clk\n");
430 return PTR_ERR(phy->div_clk);
431 }
432 } else {
433 phy->div_clk = ERR_PTR(-ENODEV);
434 }
435
436 return 0;
437}
438
439static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy)
440{
441 struct device *dev = phy->dev;
442 struct device_node *node = dev->of_node;
443 struct device_node *control_node;
444 struct platform_device *control_pdev;
445
446 phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node,
447 "syscon-phy-power");
448 if (IS_ERR(phy->phy_power_syscon)) {
449 dev_dbg(dev,
450 "can't get syscon-phy-power, using control device\n");
451 phy->phy_power_syscon = NULL;
452 } else {
453 if (of_property_read_u32_index(node,
454 "syscon-phy-power", 1,
455 &phy->power_reg)) {
456 dev_err(dev, "couldn't get power reg. offset\n");
457 return -EINVAL;
458 }
459 }
460
461 if (!phy->phy_power_syscon) {
462 control_node = of_parse_phandle(node, "ctrl-module", 0);
463 if (!control_node) {
464 dev_err(dev, "Failed to get control device phandle\n");
465 return -EINVAL;
466 }
467
468 control_pdev = of_find_device_by_node(control_node);
469 if (!control_pdev) {
470 dev_err(dev, "Failed to get control device\n");
471 return -EINVAL;
472 }
473
474 phy->control_dev = &control_pdev->dev;
475 }
476
477 if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
478 phy->pcs_syscon = syscon_regmap_lookup_by_phandle(node,
479 "syscon-pcs");
480 if (IS_ERR(phy->pcs_syscon)) {
481 dev_dbg(dev,
482 "can't get syscon-pcs, using omap control\n");
483 phy->pcs_syscon = NULL;
484 } else {
485 if (of_property_read_u32_index(node,
486 "syscon-pcs", 1,
487 &phy->pcie_pcs_reg)) {
488 dev_err(dev,
489 "couldn't get pcie pcs reg. offset\n");
490 return -EINVAL;
491 }
492 }
493 }
494
495 if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
496 phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node,
497 "syscon-pllreset");
498 if (IS_ERR(phy->dpll_reset_syscon)) {
499 dev_info(dev,
500 "can't get syscon-pllreset, sata dpll won't idle\n");
501 phy->dpll_reset_syscon = NULL;
502 } else {
503 if (of_property_read_u32_index(node,
504 "syscon-pllreset", 1,
505 &phy->dpll_reset_reg)) {
506 dev_err(dev,
507 "couldn't get pllreset reg. offset\n");
508 return -EINVAL;
509 }
510 }
511 }
512
513 return 0;
514}
515
516static int ti_pipe3_get_pll_base(struct ti_pipe3 *phy)
517{
518 struct resource *res;
519 const struct of_device_id *match;
520 struct device *dev = phy->dev;
521 struct device_node *node = dev->of_node;
522 struct platform_device *pdev = to_platform_device(dev);
523
524 if (of_device_is_compatible(node, "ti,phy-pipe3-pcie"))
525 return 0;
526
527 match = of_match_device(ti_pipe3_id_table, dev);
528 if (!match)
529 return -EINVAL;
530
531 phy->dpll_map = (struct pipe3_dpll_map *)match->data;
532 if (!phy->dpll_map) {
533 dev_err(dev, "no DPLL data\n");
534 return -EINVAL;
535 }
536
537 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
538 "pll_ctrl");
539 phy->pll_ctrl_base = devm_ioremap_resource(dev, res);
540 return PTR_ERR_OR_ZERO(phy->pll_ctrl_base);
541}
542
543static int ti_pipe3_probe(struct platform_device *pdev)
544{
545 struct ti_pipe3 *phy;
546 struct phy *generic_phy;
547 struct phy_provider *phy_provider;
548 struct device_node *node = pdev->dev.of_node;
549 struct device *dev = &pdev->dev;
550 int ret;
551
552 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
553 if (!phy)
554 return -ENOMEM;
555
556 phy->dev = dev;
557
558 ret = ti_pipe3_get_pll_base(phy);
559 if (ret)
560 return ret;
561
562 ret = ti_pipe3_get_sysctrl(phy);
563 if (ret)
564 return ret;
565
566 ret = ti_pipe3_get_clk(phy);
567 if (ret)
568 return ret;
569
570 platform_set_drvdata(pdev, phy);
571 pm_runtime_enable(dev);
572
573
574
575
576 if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
577 if (!IS_ERR(phy->refclk)) {
578 clk_prepare_enable(phy->refclk);
579 phy->sata_refclk_enabled = true;
580 }
581 }
582
583 generic_phy = devm_phy_create(dev, NULL, &ops);
584 if (IS_ERR(generic_phy))
585 return PTR_ERR(generic_phy);
586
587 phy_set_drvdata(generic_phy, phy);
588
589 ti_pipe3_power_off(generic_phy);
590
591 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
592 return PTR_ERR_OR_ZERO(phy_provider);
593}
594
595static int ti_pipe3_remove(struct platform_device *pdev)
596{
597 pm_runtime_disable(&pdev->dev);
598
599 return 0;
600}
601
602static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy)
603{
604 int ret = 0;
605
606 if (!IS_ERR(phy->refclk)) {
607 ret = clk_prepare_enable(phy->refclk);
608 if (ret) {
609 dev_err(phy->dev, "Failed to enable refclk %d\n", ret);
610 return ret;
611 }
612 }
613
614 if (!IS_ERR(phy->wkupclk)) {
615 ret = clk_prepare_enable(phy->wkupclk);
616 if (ret) {
617 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
618 goto disable_refclk;
619 }
620 }
621
622 if (!IS_ERR(phy->div_clk)) {
623 ret = clk_prepare_enable(phy->div_clk);
624 if (ret) {
625 dev_err(phy->dev, "Failed to enable div_clk %d\n", ret);
626 goto disable_wkupclk;
627 }
628 }
629
630 return 0;
631
632disable_wkupclk:
633 if (!IS_ERR(phy->wkupclk))
634 clk_disable_unprepare(phy->wkupclk);
635
636disable_refclk:
637 if (!IS_ERR(phy->refclk))
638 clk_disable_unprepare(phy->refclk);
639
640 return ret;
641}
642
643static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy)
644{
645 if (!IS_ERR(phy->wkupclk))
646 clk_disable_unprepare(phy->wkupclk);
647 if (!IS_ERR(phy->refclk)) {
648 clk_disable_unprepare(phy->refclk);
649
650
651
652
653 if (phy->sata_refclk_enabled) {
654 clk_disable_unprepare(phy->refclk);
655 phy->sata_refclk_enabled = false;
656 }
657 }
658
659 if (!IS_ERR(phy->div_clk))
660 clk_disable_unprepare(phy->div_clk);
661}
662
663static const struct of_device_id ti_pipe3_id_table[] = {
664 {
665 .compatible = "ti,phy-usb3",
666 .data = dpll_map_usb,
667 },
668 {
669 .compatible = "ti,omap-usb3",
670 .data = dpll_map_usb,
671 },
672 {
673 .compatible = "ti,phy-pipe3-sata",
674 .data = dpll_map_sata,
675 },
676 {
677 .compatible = "ti,phy-pipe3-pcie",
678 },
679 {}
680};
681MODULE_DEVICE_TABLE(of, ti_pipe3_id_table);
682
683static struct platform_driver ti_pipe3_driver = {
684 .probe = ti_pipe3_probe,
685 .remove = ti_pipe3_remove,
686 .driver = {
687 .name = "ti-pipe3",
688 .of_match_table = ti_pipe3_id_table,
689 },
690};
691
692module_platform_driver(ti_pipe3_driver);
693
694MODULE_ALIAS("platform:ti_pipe3");
695MODULE_AUTHOR("Texas Instruments Inc.");
696MODULE_DESCRIPTION("TI PIPE3 phy driver");
697MODULE_LICENSE("GPL v2");
698
