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1// SPDX-License-Identifier: GPL-2.0-or-later
2// Copyright IBM Corp
3// Copyright ASPEED Technology
4
5#define pr_fmt(fmt) "clk-ast2600: " fmt
6
7#include <linux/mfd/syscon.h>
8#include <linux/of_address.h>
9#include <linux/of_device.h>
10#include <linux/platform_device.h>
11#include <linux/regmap.h>
12#include <linux/slab.h>
13
14#include <dt-bindings/clock/ast2600-clock.h>
15
16#include "clk-aspeed.h"
17
18#define ASPEED_G6_NUM_CLKS 71
19
20#define ASPEED_G6_SILICON_REV 0x014
21#define CHIP_REVISION_ID GENMASK(23, 16)
22
23#define ASPEED_G6_RESET_CTRL 0x040
24#define ASPEED_G6_RESET_CTRL2 0x050
25
26#define ASPEED_G6_CLK_STOP_CTRL 0x080
27#define ASPEED_G6_CLK_STOP_CTRL2 0x090
28
29#define ASPEED_G6_MISC_CTRL 0x0C0
30#define UART_DIV13_EN BIT(12)
31
32#define ASPEED_G6_CLK_SELECTION1 0x300
33#define ASPEED_G6_CLK_SELECTION2 0x304
34#define ASPEED_G6_CLK_SELECTION4 0x310
35
36#define ASPEED_HPLL_PARAM 0x200
37#define ASPEED_APLL_PARAM 0x210
38#define ASPEED_MPLL_PARAM 0x220
39#define ASPEED_EPLL_PARAM 0x240
40#define ASPEED_DPLL_PARAM 0x260
41
42#define ASPEED_G6_STRAP1 0x500
43
44#define ASPEED_MAC12_CLK_DLY 0x340
45#define ASPEED_MAC34_CLK_DLY 0x350
46
47/* Globally visible clocks */
48static DEFINE_SPINLOCK(aspeed_g6_clk_lock);
49
50/* Keeps track of all clocks */
51static struct clk_hw_onecell_data *aspeed_g6_clk_data;
52
53static void __iomem *scu_g6_base;
54
55/*
56 * Clocks marked with CLK_IS_CRITICAL:
57 *
58 * ref0 and ref1 are essential for the SoC to operate
59 * mpll is required if SDRAM is used
60 */
61static const struct aspeed_gate_data aspeed_g6_gates[] = {
62 /* clk rst name parent flags */
63 [ASPEED_CLK_GATE_MCLK] = { 0, -1, "mclk-gate", "mpll", CLK_IS_CRITICAL }, /* SDRAM */
64 [ASPEED_CLK_GATE_ECLK] = { 1, 6, "eclk-gate", "eclk", 0 }, /* Video Engine */
65 [ASPEED_CLK_GATE_GCLK] = { 2, 7, "gclk-gate", NULL, 0 }, /* 2D engine */
66 /* vclk parent - dclk/d1clk/hclk/mclk */
67 [ASPEED_CLK_GATE_VCLK] = { 3, -1, "vclk-gate", NULL, 0 }, /* Video Capture */
68 [ASPEED_CLK_GATE_BCLK] = { 4, 8, "bclk-gate", "bclk", 0 }, /* PCIe/PCI */
69 /* From dpll */
70 [ASPEED_CLK_GATE_DCLK] = { 5, -1, "dclk-gate", NULL, CLK_IS_CRITICAL }, /* DAC */
71 [ASPEED_CLK_GATE_REF0CLK] = { 6, -1, "ref0clk-gate", "clkin", CLK_IS_CRITICAL },
72 [ASPEED_CLK_GATE_USBPORT2CLK] = { 7, 3, "usb-port2-gate", NULL, 0 }, /* USB2.0 Host port 2 */
73 /* Reserved 8 */
74 [ASPEED_CLK_GATE_USBUHCICLK] = { 9, 15, "usb-uhci-gate", NULL, 0 }, /* USB1.1 (requires port 2 enabled) */
75 /* From dpll/epll/40mhz usb p1 phy/gpioc6/dp phy pll */
76 [ASPEED_CLK_GATE_D1CLK] = { 10, 13, "d1clk-gate", "d1clk", 0 }, /* GFX CRT */
77 /* Reserved 11/12 */
78 [ASPEED_CLK_GATE_YCLK] = { 13, 4, "yclk-gate", NULL, 0 }, /* HAC */
79 [ASPEED_CLK_GATE_USBPORT1CLK] = { 14, 14, "usb-port1-gate", NULL, 0 }, /* USB2 hub/USB2 host port 1/USB1.1 dev */
80 [ASPEED_CLK_GATE_UART5CLK] = { 15, -1, "uart5clk-gate", "uart", 0 }, /* UART5 */
81 /* Reserved 16/19 */
82 [ASPEED_CLK_GATE_MAC1CLK] = { 20, 11, "mac1clk-gate", "mac12", 0 }, /* MAC1 */
83 [ASPEED_CLK_GATE_MAC2CLK] = { 21, 12, "mac2clk-gate", "mac12", 0 }, /* MAC2 */
84 /* Reserved 22/23 */
85 [ASPEED_CLK_GATE_RSACLK] = { 24, 4, "rsaclk-gate", NULL, 0 }, /* HAC */
86 [ASPEED_CLK_GATE_RVASCLK] = { 25, 9, "rvasclk-gate", NULL, 0 }, /* RVAS */
87 /* Reserved 26 */
88 [ASPEED_CLK_GATE_EMMCCLK] = { 27, 16, "emmcclk-gate", NULL, 0 }, /* For card clk */
89 /* Reserved 28/29/30 */
90 [ASPEED_CLK_GATE_LCLK] = { 32, 32, "lclk-gate", NULL, 0 }, /* LPC */
91 [ASPEED_CLK_GATE_ESPICLK] = { 33, -1, "espiclk-gate", NULL, 0 }, /* eSPI */
92 [ASPEED_CLK_GATE_REF1CLK] = { 34, -1, "ref1clk-gate", "clkin", CLK_IS_CRITICAL },
93 /* Reserved 35 */
94 [ASPEED_CLK_GATE_SDCLK] = { 36, 56, "sdclk-gate", NULL, 0 }, /* SDIO/SD */
95 [ASPEED_CLK_GATE_LHCCLK] = { 37, -1, "lhclk-gate", "lhclk", 0 }, /* LPC master/LPC+ */
96 /* Reserved 38 RSA: no longer used */
97 /* Reserved 39 */
98 [ASPEED_CLK_GATE_I3C0CLK] = { 40, 40, "i3c0clk-gate", NULL, 0 }, /* I3C0 */
99 [ASPEED_CLK_GATE_I3C1CLK] = { 41, 41, "i3c1clk-gate", NULL, 0 }, /* I3C1 */
100 [ASPEED_CLK_GATE_I3C2CLK] = { 42, 42, "i3c2clk-gate", NULL, 0 }, /* I3C2 */
101 [ASPEED_CLK_GATE_I3C3CLK] = { 43, 43, "i3c3clk-gate", NULL, 0 }, /* I3C3 */
102 [ASPEED_CLK_GATE_I3C4CLK] = { 44, 44, "i3c4clk-gate", NULL, 0 }, /* I3C4 */
103 [ASPEED_CLK_GATE_I3C5CLK] = { 45, 45, "i3c5clk-gate", NULL, 0 }, /* I3C5 */
104 [ASPEED_CLK_GATE_I3C6CLK] = { 46, 46, "i3c6clk-gate", NULL, 0 }, /* I3C6 */
105 [ASPEED_CLK_GATE_I3C7CLK] = { 47, 47, "i3c7clk-gate", NULL, 0 }, /* I3C7 */
106 [ASPEED_CLK_GATE_UART1CLK] = { 48, -1, "uart1clk-gate", "uart", 0 }, /* UART1 */
107 [ASPEED_CLK_GATE_UART2CLK] = { 49, -1, "uart2clk-gate", "uart", 0 }, /* UART2 */
108 [ASPEED_CLK_GATE_UART3CLK] = { 50, -1, "uart3clk-gate", "uart", 0 }, /* UART3 */
109 [ASPEED_CLK_GATE_UART4CLK] = { 51, -1, "uart4clk-gate", "uart", 0 }, /* UART4 */
110 [ASPEED_CLK_GATE_MAC3CLK] = { 52, 52, "mac3clk-gate", "mac34", 0 }, /* MAC3 */
111 [ASPEED_CLK_GATE_MAC4CLK] = { 53, 53, "mac4clk-gate", "mac34", 0 }, /* MAC4 */
112 [ASPEED_CLK_GATE_UART6CLK] = { 54, -1, "uart6clk-gate", "uartx", 0 }, /* UART6 */
113 [ASPEED_CLK_GATE_UART7CLK] = { 55, -1, "uart7clk-gate", "uartx", 0 }, /* UART7 */
114 [ASPEED_CLK_GATE_UART8CLK] = { 56, -1, "uart8clk-gate", "uartx", 0 }, /* UART8 */
115 [ASPEED_CLK_GATE_UART9CLK] = { 57, -1, "uart9clk-gate", "uartx", 0 }, /* UART9 */
116 [ASPEED_CLK_GATE_UART10CLK] = { 58, -1, "uart10clk-gate", "uartx", 0 }, /* UART10 */
117 [ASPEED_CLK_GATE_UART11CLK] = { 59, -1, "uart11clk-gate", "uartx", 0 }, /* UART11 */
118 [ASPEED_CLK_GATE_UART12CLK] = { 60, -1, "uart12clk-gate", "uartx", 0 }, /* UART12 */
119 [ASPEED_CLK_GATE_UART13CLK] = { 61, -1, "uart13clk-gate", "uartx", 0 }, /* UART13 */
120 [ASPEED_CLK_GATE_FSICLK] = { 62, 59, "fsiclk-gate", NULL, 0 }, /* FSI */
121};
122
123static const struct clk_div_table ast2600_eclk_div_table[] = {
124 { 0x0, 2 },
125 { 0x1, 2 },
126 { 0x2, 3 },
127 { 0x3, 4 },
128 { 0x4, 5 },
129 { 0x5, 6 },
130 { 0x6, 7 },
131 { 0x7, 8 },
132 { 0 }
133};
134
135static const struct clk_div_table ast2600_emmc_extclk_div_table[] = {
136 { 0x0, 2 },
137 { 0x1, 4 },
138 { 0x2, 6 },
139 { 0x3, 8 },
140 { 0x4, 10 },
141 { 0x5, 12 },
142 { 0x6, 14 },
143 { 0x7, 16 },
144 { 0 }
145};
146
147static const struct clk_div_table ast2600_mac_div_table[] = {
148 { 0x0, 4 },
149 { 0x1, 4 },
150 { 0x2, 6 },
151 { 0x3, 8 },
152 { 0x4, 10 },
153 { 0x5, 12 },
154 { 0x6, 14 },
155 { 0x7, 16 },
156 { 0 }
157};
158
159static const struct clk_div_table ast2600_div_table[] = {
160 { 0x0, 4 },
161 { 0x1, 8 },
162 { 0x2, 12 },
163 { 0x3, 16 },
164 { 0x4, 20 },
165 { 0x5, 24 },
166 { 0x6, 28 },
167 { 0x7, 32 },
168 { 0 }
169};
170
171/* For hpll/dpll/epll/mpll */
172static struct clk_hw *ast2600_calc_pll(const char *name, u32 val)
173{
174 unsigned int mult, div;
175
176 if (val & BIT(24)) {
177 /* Pass through mode */
178 mult = div = 1;
179 } else {
180 /* F = 25Mhz * [(M + 2) / (n + 1)] / (p + 1) */
181 u32 m = val & 0x1fff;
182 u32 n = (val >> 13) & 0x3f;
183 u32 p = (val >> 19) & 0xf;
184 mult = (m + 1) / (n + 1);
185 div = (p + 1);
186 }
187 return clk_hw_register_fixed_factor(NULL, name, "clkin", 0,
188 mult, div);
189};
190
191static struct clk_hw *ast2600_calc_apll(const char *name, u32 val)
192{
193 unsigned int mult, div;
194 u32 chip_id = readl(scu_g6_base + ASPEED_G6_SILICON_REV);
195
196 if (((chip_id & CHIP_REVISION_ID) >> 16) >= 2) {
197 if (val & BIT(24)) {
198 /* Pass through mode */
199 mult = div = 1;
200 } else {
201 /* F = 25Mhz * [(m + 1) / (n + 1)] / (p + 1) */
202 u32 m = val & 0x1fff;
203 u32 n = (val >> 13) & 0x3f;
204 u32 p = (val >> 19) & 0xf;
205
206 mult = (m + 1);
207 div = (n + 1) * (p + 1);
208 }
209 } else {
210 if (val & BIT(20)) {
211 /* Pass through mode */
212 mult = div = 1;
213 } else {
214 /* F = 25Mhz * (2-od) * [(m + 2) / (n + 1)] */
215 u32 m = (val >> 5) & 0x3f;
216 u32 od = (val >> 4) & 0x1;
217 u32 n = val & 0xf;
218
219 mult = (2 - od) * (m + 2);
220 div = n + 1;
221 }
222 }
223 return clk_hw_register_fixed_factor(NULL, name, "clkin", 0,
224 mult, div);
225};
226
227static u32 get_bit(u8 idx)
228{
229 return BIT(idx % 32);
230}
231
232static u32 get_reset_reg(struct aspeed_clk_gate *gate)
233{
234 if (gate->reset_idx < 32)
235 return ASPEED_G6_RESET_CTRL;
236
237 return ASPEED_G6_RESET_CTRL2;
238}
239
240static u32 get_clock_reg(struct aspeed_clk_gate *gate)
241{
242 if (gate->clock_idx < 32)
243 return ASPEED_G6_CLK_STOP_CTRL;
244
245 return ASPEED_G6_CLK_STOP_CTRL2;
246}
247
248static int aspeed_g6_clk_is_enabled(struct clk_hw *hw)
249{
250 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
251 u32 clk = get_bit(gate->clock_idx);
252 u32 rst = get_bit(gate->reset_idx);
253 u32 reg;
254 u32 enval;
255
256 /*
257 * If the IP is in reset, treat the clock as not enabled,
258 * this happens with some clocks such as the USB one when
259 * coming from cold reset. Without this, aspeed_clk_enable()
260 * will fail to lift the reset.
261 */
262 if (gate->reset_idx >= 0) {
263 regmap_read(gate->map, get_reset_reg(gate), ®);
264
265 if (reg & rst)
266 return 0;
267 }
268
269 regmap_read(gate->map, get_clock_reg(gate), ®);
270
271 enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? 0 : clk;
272
273 return ((reg & clk) == enval) ? 1 : 0;
274}
275
276static int aspeed_g6_clk_enable(struct clk_hw *hw)
277{
278 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
279 unsigned long flags;
280 u32 clk = get_bit(gate->clock_idx);
281 u32 rst = get_bit(gate->reset_idx);
282
283 spin_lock_irqsave(gate->lock, flags);
284
285 if (aspeed_g6_clk_is_enabled(hw)) {
286 spin_unlock_irqrestore(gate->lock, flags);
287 return 0;
288 }
289
290 if (gate->reset_idx >= 0) {
291 /* Put IP in reset */
292 regmap_write(gate->map, get_reset_reg(gate), rst);
293 /* Delay 100us */
294 udelay(100);
295 }
296
297 /* Enable clock */
298 if (gate->flags & CLK_GATE_SET_TO_DISABLE) {
299 /* Clock is clear to enable, so use set to clear register */
300 regmap_write(gate->map, get_clock_reg(gate) + 0x04, clk);
301 } else {
302 /* Clock is set to enable, so use write to set register */
303 regmap_write(gate->map, get_clock_reg(gate), clk);
304 }
305
306 if (gate->reset_idx >= 0) {
307 /* A delay of 10ms is specified by the ASPEED docs */
308 mdelay(10);
309 /* Take IP out of reset */
310 regmap_write(gate->map, get_reset_reg(gate) + 0x4, rst);
311 }
312
313 spin_unlock_irqrestore(gate->lock, flags);
314
315 return 0;
316}
317
318static void aspeed_g6_clk_disable(struct clk_hw *hw)
319{
320 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
321 unsigned long flags;
322 u32 clk = get_bit(gate->clock_idx);
323
324 spin_lock_irqsave(gate->lock, flags);
325
326 if (gate->flags & CLK_GATE_SET_TO_DISABLE) {
327 regmap_write(gate->map, get_clock_reg(gate), clk);
328 } else {
329 /* Use set to clear register */
330 regmap_write(gate->map, get_clock_reg(gate) + 0x4, clk);
331 }
332
333 spin_unlock_irqrestore(gate->lock, flags);
334}
335
336static const struct clk_ops aspeed_g6_clk_gate_ops = {
337 .enable = aspeed_g6_clk_enable,
338 .disable = aspeed_g6_clk_disable,
339 .is_enabled = aspeed_g6_clk_is_enabled,
340};
341
342static int aspeed_g6_reset_deassert(struct reset_controller_dev *rcdev,
343 unsigned long id)
344{
345 struct aspeed_reset *ar = to_aspeed_reset(rcdev);
346 u32 rst = get_bit(id);
347 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
348
349 /* Use set to clear register */
350 return regmap_write(ar->map, reg + 0x04, rst);
351}
352
353static int aspeed_g6_reset_assert(struct reset_controller_dev *rcdev,
354 unsigned long id)
355{
356 struct aspeed_reset *ar = to_aspeed_reset(rcdev);
357 u32 rst = get_bit(id);
358 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
359
360 return regmap_write(ar->map, reg, rst);
361}
362
363static int aspeed_g6_reset_status(struct reset_controller_dev *rcdev,
364 unsigned long id)
365{
366 struct aspeed_reset *ar = to_aspeed_reset(rcdev);
367 int ret;
368 u32 val;
369 u32 rst = get_bit(id);
370 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
371
372 ret = regmap_read(ar->map, reg, &val);
373 if (ret)
374 return ret;
375
376 return !!(val & rst);
377}
378
379static const struct reset_control_ops aspeed_g6_reset_ops = {
380 .assert = aspeed_g6_reset_assert,
381 .deassert = aspeed_g6_reset_deassert,
382 .status = aspeed_g6_reset_status,
383};
384
385static struct clk_hw *aspeed_g6_clk_hw_register_gate(struct device *dev,
386 const char *name, const char *parent_name, unsigned long flags,
387 struct regmap *map, u8 clock_idx, u8 reset_idx,
388 u8 clk_gate_flags, spinlock_t *lock)
389{
390 struct aspeed_clk_gate *gate;
391 struct clk_init_data init;
392 struct clk_hw *hw;
393 int ret;
394
395 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
396 if (!gate)
397 return ERR_PTR(-ENOMEM);
398
399 init.name = name;
400 init.ops = &aspeed_g6_clk_gate_ops;
401 init.flags = flags;
402 init.parent_names = parent_name ? &parent_name : NULL;
403 init.num_parents = parent_name ? 1 : 0;
404
405 gate->map = map;
406 gate->clock_idx = clock_idx;
407 gate->reset_idx = reset_idx;
408 gate->flags = clk_gate_flags;
409 gate->lock = lock;
410 gate->hw.init = &init;
411
412 hw = &gate->hw;
413 ret = clk_hw_register(dev, hw);
414 if (ret) {
415 kfree(gate);
416 hw = ERR_PTR(ret);
417 }
418
419 return hw;
420}
421
422static const char *const emmc_extclk_parent_names[] = {
423 "emmc_extclk_hpll_in",
424 "mpll",
425};
426
427static const char * const vclk_parent_names[] = {
428 "dpll",
429 "d1pll",
430 "hclk",
431 "mclk",
432};
433
434static const char * const d1clk_parent_names[] = {
435 "dpll",
436 "epll",
437 "usb-phy-40m",
438 "gpioc6_clkin",
439 "dp_phy_pll",
440};
441
442static int aspeed_g6_clk_probe(struct platform_device *pdev)
443{
444 struct device *dev = &pdev->dev;
445 struct aspeed_reset *ar;
446 struct regmap *map;
447 struct clk_hw *hw;
448 u32 val, rate;
449 int i, ret;
450
451 map = syscon_node_to_regmap(dev->of_node);
452 if (IS_ERR(map)) {
453 dev_err(dev, "no syscon regmap\n");
454 return PTR_ERR(map);
455 }
456
457 ar = devm_kzalloc(dev, sizeof(*ar), GFP_KERNEL);
458 if (!ar)
459 return -ENOMEM;
460
461 ar->map = map;
462
463 ar->rcdev.owner = THIS_MODULE;
464 ar->rcdev.nr_resets = 64;
465 ar->rcdev.ops = &aspeed_g6_reset_ops;
466 ar->rcdev.of_node = dev->of_node;
467
468 ret = devm_reset_controller_register(dev, &ar->rcdev);
469 if (ret) {
470 dev_err(dev, "could not register reset controller\n");
471 return ret;
472 }
473
474 /* UART clock div13 setting */
475 regmap_read(map, ASPEED_G6_MISC_CTRL, &val);
476 if (val & UART_DIV13_EN)
477 rate = 24000000 / 13;
478 else
479 rate = 24000000;
480 hw = clk_hw_register_fixed_rate(dev, "uart", NULL, 0, rate);
481 if (IS_ERR(hw))
482 return PTR_ERR(hw);
483 aspeed_g6_clk_data->hws[ASPEED_CLK_UART] = hw;
484
485 /* UART6~13 clock div13 setting */
486 regmap_read(map, 0x80, &val);
487 if (val & BIT(31))
488 rate = 24000000 / 13;
489 else
490 rate = 24000000;
491 hw = clk_hw_register_fixed_rate(dev, "uartx", NULL, 0, rate);
492 if (IS_ERR(hw))
493 return PTR_ERR(hw);
494 aspeed_g6_clk_data->hws[ASPEED_CLK_UARTX] = hw;
495
496 /* EMMC ext clock */
497 hw = clk_hw_register_fixed_factor(dev, "emmc_extclk_hpll_in", "hpll",
498 0, 1, 2);
499 if (IS_ERR(hw))
500 return PTR_ERR(hw);
501
502 hw = clk_hw_register_mux(dev, "emmc_extclk_mux",
503 emmc_extclk_parent_names,
504 ARRAY_SIZE(emmc_extclk_parent_names), 0,
505 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 11, 1,
506 0, &aspeed_g6_clk_lock);
507 if (IS_ERR(hw))
508 return PTR_ERR(hw);
509
510 hw = clk_hw_register_gate(dev, "emmc_extclk_gate", "emmc_extclk_mux",
511 0, scu_g6_base + ASPEED_G6_CLK_SELECTION1,
512 15, 0, &aspeed_g6_clk_lock);
513 if (IS_ERR(hw))
514 return PTR_ERR(hw);
515
516 hw = clk_hw_register_divider_table(dev, "emmc_extclk",
517 "emmc_extclk_gate", 0,
518 scu_g6_base +
519 ASPEED_G6_CLK_SELECTION1, 12,
520 3, 0, ast2600_emmc_extclk_div_table,
521 &aspeed_g6_clk_lock);
522 if (IS_ERR(hw))
523 return PTR_ERR(hw);
524 aspeed_g6_clk_data->hws[ASPEED_CLK_EMMC] = hw;
525
526 /* SD/SDIO clock divider and gate */
527 hw = clk_hw_register_gate(dev, "sd_extclk_gate", "hpll", 0,
528 scu_g6_base + ASPEED_G6_CLK_SELECTION4, 31, 0,
529 &aspeed_g6_clk_lock);
530 if (IS_ERR(hw))
531 return PTR_ERR(hw);
532 hw = clk_hw_register_divider_table(dev, "sd_extclk", "sd_extclk_gate",
533 0, scu_g6_base + ASPEED_G6_CLK_SELECTION4, 28, 3, 0,
534 ast2600_div_table,
535 &aspeed_g6_clk_lock);
536 if (IS_ERR(hw))
537 return PTR_ERR(hw);
538 aspeed_g6_clk_data->hws[ASPEED_CLK_SDIO] = hw;
539
540 /* MAC1/2 RMII 50MHz RCLK */
541 hw = clk_hw_register_fixed_rate(dev, "mac12rclk", "hpll", 0, 50000000);
542 if (IS_ERR(hw))
543 return PTR_ERR(hw);
544
545 /* MAC1/2 AHB bus clock divider */
546 hw = clk_hw_register_divider_table(dev, "mac12", "hpll", 0,
547 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 16, 3, 0,
548 ast2600_mac_div_table,
549 &aspeed_g6_clk_lock);
550 if (IS_ERR(hw))
551 return PTR_ERR(hw);
552 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC12] = hw;
553
554 /* RMII1 50MHz (RCLK) output enable */
555 hw = clk_hw_register_gate(dev, "mac1rclk", "mac12rclk", 0,
556 scu_g6_base + ASPEED_MAC12_CLK_DLY, 29, 0,
557 &aspeed_g6_clk_lock);
558 if (IS_ERR(hw))
559 return PTR_ERR(hw);
560 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC1RCLK] = hw;
561
562 /* RMII2 50MHz (RCLK) output enable */
563 hw = clk_hw_register_gate(dev, "mac2rclk", "mac12rclk", 0,
564 scu_g6_base + ASPEED_MAC12_CLK_DLY, 30, 0,
565 &aspeed_g6_clk_lock);
566 if (IS_ERR(hw))
567 return PTR_ERR(hw);
568 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC2RCLK] = hw;
569
570 /* MAC1/2 RMII 50MHz RCLK */
571 hw = clk_hw_register_fixed_rate(dev, "mac34rclk", "hclk", 0, 50000000);
572 if (IS_ERR(hw))
573 return PTR_ERR(hw);
574
575 /* MAC3/4 AHB bus clock divider */
576 hw = clk_hw_register_divider_table(dev, "mac34", "hpll", 0,
577 scu_g6_base + 0x310, 24, 3, 0,
578 ast2600_mac_div_table,
579 &aspeed_g6_clk_lock);
580 if (IS_ERR(hw))
581 return PTR_ERR(hw);
582 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC34] = hw;
583
584 /* RMII3 50MHz (RCLK) output enable */
585 hw = clk_hw_register_gate(dev, "mac3rclk", "mac34rclk", 0,
586 scu_g6_base + ASPEED_MAC34_CLK_DLY, 29, 0,
587 &aspeed_g6_clk_lock);
588 if (IS_ERR(hw))
589 return PTR_ERR(hw);
590 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC3RCLK] = hw;
591
592 /* RMII4 50MHz (RCLK) output enable */
593 hw = clk_hw_register_gate(dev, "mac4rclk", "mac34rclk", 0,
594 scu_g6_base + ASPEED_MAC34_CLK_DLY, 30, 0,
595 &aspeed_g6_clk_lock);
596 if (IS_ERR(hw))
597 return PTR_ERR(hw);
598 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC4RCLK] = hw;
599
600 /* LPC Host (LHCLK) clock divider */
601 hw = clk_hw_register_divider_table(dev, "lhclk", "hpll", 0,
602 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0,
603 ast2600_div_table,
604 &aspeed_g6_clk_lock);
605 if (IS_ERR(hw))
606 return PTR_ERR(hw);
607 aspeed_g6_clk_data->hws[ASPEED_CLK_LHCLK] = hw;
608
609 /* gfx d1clk : use dp clk */
610 regmap_update_bits(map, ASPEED_G6_CLK_SELECTION1, GENMASK(10, 8), BIT(10));
611 /* SoC Display clock selection */
612 hw = clk_hw_register_mux(dev, "d1clk", d1clk_parent_names,
613 ARRAY_SIZE(d1clk_parent_names), 0,
614 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 8, 3, 0,
615 &aspeed_g6_clk_lock);
616 if (IS_ERR(hw))
617 return PTR_ERR(hw);
618 aspeed_g6_clk_data->hws[ASPEED_CLK_D1CLK] = hw;
619
620 /* d1 clk div 0x308[17:15] x [14:12] - 8,7,6,5,4,3,2,1 */
621 regmap_write(map, 0x308, 0x12000); /* 3x3 = 9 */
622
623 /* P-Bus (BCLK) clock divider */
624 hw = clk_hw_register_divider_table(dev, "bclk", "hpll", 0,
625 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0,
626 ast2600_div_table,
627 &aspeed_g6_clk_lock);
628 if (IS_ERR(hw))
629 return PTR_ERR(hw);
630 aspeed_g6_clk_data->hws[ASPEED_CLK_BCLK] = hw;
631
632 /* Video Capture clock selection */
633 hw = clk_hw_register_mux(dev, "vclk", vclk_parent_names,
634 ARRAY_SIZE(vclk_parent_names), 0,
635 scu_g6_base + ASPEED_G6_CLK_SELECTION2, 12, 3, 0,
636 &aspeed_g6_clk_lock);
637 if (IS_ERR(hw))
638 return PTR_ERR(hw);
639 aspeed_g6_clk_data->hws[ASPEED_CLK_VCLK] = hw;
640
641 /* Video Engine clock divider */
642 hw = clk_hw_register_divider_table(dev, "eclk", NULL, 0,
643 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 28, 3, 0,
644 ast2600_eclk_div_table,
645 &aspeed_g6_clk_lock);
646 if (IS_ERR(hw))
647 return PTR_ERR(hw);
648 aspeed_g6_clk_data->hws[ASPEED_CLK_ECLK] = hw;
649
650 for (i = 0; i < ARRAY_SIZE(aspeed_g6_gates); i++) {
651 const struct aspeed_gate_data *gd = &aspeed_g6_gates[i];
652 u32 gate_flags;
653
654 /*
655 * Special case: the USB port 1 clock (bit 14) is always
656 * working the opposite way from the other ones.
657 */
658 gate_flags = (gd->clock_idx == 14) ? 0 : CLK_GATE_SET_TO_DISABLE;
659 hw = aspeed_g6_clk_hw_register_gate(dev,
660 gd->name,
661 gd->parent_name,
662 gd->flags,
663 map,
664 gd->clock_idx,
665 gd->reset_idx,
666 gate_flags,
667 &aspeed_g6_clk_lock);
668 if (IS_ERR(hw))
669 return PTR_ERR(hw);
670 aspeed_g6_clk_data->hws[i] = hw;
671 }
672
673 return 0;
674};
675
676static const struct of_device_id aspeed_g6_clk_dt_ids[] = {
677 { .compatible = "aspeed,ast2600-scu" },
678 { }
679};
680
681static struct platform_driver aspeed_g6_clk_driver = {
682 .probe = aspeed_g6_clk_probe,
683 .driver = {
684 .name = "ast2600-clk",
685 .of_match_table = aspeed_g6_clk_dt_ids,
686 .suppress_bind_attrs = true,
687 },
688};
689builtin_platform_driver(aspeed_g6_clk_driver);
690
691static const u32 ast2600_a0_axi_ahb_div_table[] = {
692 2, 2, 3, 5,
693};
694
695static const u32 ast2600_a1_axi_ahb_div0_tbl[] = {
696 3, 2, 3, 4,
697};
698
699static const u32 ast2600_a1_axi_ahb_div1_tbl[] = {
700 3, 4, 6, 8,
701};
702
703static const u32 ast2600_a1_axi_ahb200_tbl[] = {
704 3, 4, 3, 4, 2, 2, 2, 2,
705};
706
707static void __init aspeed_g6_cc(struct regmap *map)
708{
709 struct clk_hw *hw;
710 u32 val, div, divbits, chip_id, axi_div, ahb_div;
711
712 clk_hw_register_fixed_rate(NULL, "clkin", NULL, 0, 25000000);
713
714 /*
715 * High-speed PLL clock derived from the crystal. This the CPU clock,
716 * and we assume that it is enabled
717 */
718 regmap_read(map, ASPEED_HPLL_PARAM, &val);
719 aspeed_g6_clk_data->hws[ASPEED_CLK_HPLL] = ast2600_calc_pll("hpll", val);
720
721 regmap_read(map, ASPEED_MPLL_PARAM, &val);
722 aspeed_g6_clk_data->hws[ASPEED_CLK_MPLL] = ast2600_calc_pll("mpll", val);
723
724 regmap_read(map, ASPEED_DPLL_PARAM, &val);
725 aspeed_g6_clk_data->hws[ASPEED_CLK_DPLL] = ast2600_calc_pll("dpll", val);
726
727 regmap_read(map, ASPEED_EPLL_PARAM, &val);
728 aspeed_g6_clk_data->hws[ASPEED_CLK_EPLL] = ast2600_calc_pll("epll", val);
729
730 regmap_read(map, ASPEED_APLL_PARAM, &val);
731 aspeed_g6_clk_data->hws[ASPEED_CLK_APLL] = ast2600_calc_apll("apll", val);
732
733 /* Strap bits 12:11 define the AXI/AHB clock frequency ratio (aka HCLK)*/
734 regmap_read(map, ASPEED_G6_STRAP1, &val);
735 if (val & BIT(16))
736 axi_div = 1;
737 else
738 axi_div = 2;
739
740 divbits = (val >> 11) & 0x3;
741 regmap_read(map, ASPEED_G6_SILICON_REV, &chip_id);
742 if (chip_id & BIT(16)) {
743 if (!divbits) {
744 ahb_div = ast2600_a1_axi_ahb200_tbl[(val >> 8) & 0x3];
745 if (val & BIT(16))
746 ahb_div *= 2;
747 } else {
748 if (val & BIT(16))
749 ahb_div = ast2600_a1_axi_ahb_div1_tbl[divbits];
750 else
751 ahb_div = ast2600_a1_axi_ahb_div0_tbl[divbits];
752 }
753 } else {
754 ahb_div = ast2600_a0_axi_ahb_div_table[(val >> 11) & 0x3];
755 }
756
757 hw = clk_hw_register_fixed_factor(NULL, "ahb", "hpll", 0, 1, axi_div * ahb_div);
758 aspeed_g6_clk_data->hws[ASPEED_CLK_AHB] = hw;
759
760 regmap_read(map, ASPEED_G6_CLK_SELECTION1, &val);
761 val = (val >> 23) & 0x7;
762 div = 4 * (val + 1);
763 hw = clk_hw_register_fixed_factor(NULL, "apb1", "hpll", 0, 1, div);
764 aspeed_g6_clk_data->hws[ASPEED_CLK_APB1] = hw;
765
766 regmap_read(map, ASPEED_G6_CLK_SELECTION4, &val);
767 val = (val >> 9) & 0x7;
768 div = 2 * (val + 1);
769 hw = clk_hw_register_fixed_factor(NULL, "apb2", "ahb", 0, 1, div);
770 aspeed_g6_clk_data->hws[ASPEED_CLK_APB2] = hw;
771
772 /* USB 2.0 port1 phy 40MHz clock */
773 hw = clk_hw_register_fixed_rate(NULL, "usb-phy-40m", NULL, 0, 40000000);
774 aspeed_g6_clk_data->hws[ASPEED_CLK_USBPHY_40M] = hw;
775};
776
777static void __init aspeed_g6_cc_init(struct device_node *np)
778{
779 struct regmap *map;
780 int ret;
781 int i;
782
783 scu_g6_base = of_iomap(np, 0);
784 if (!scu_g6_base)
785 return;
786
787 aspeed_g6_clk_data = kzalloc(struct_size(aspeed_g6_clk_data, hws,
788 ASPEED_G6_NUM_CLKS), GFP_KERNEL);
789 if (!aspeed_g6_clk_data)
790 return;
791
792 /*
793 * This way all clocks fetched before the platform device probes,
794 * except those we assign here for early use, will be deferred.
795 */
796 for (i = 0; i < ASPEED_G6_NUM_CLKS; i++)
797 aspeed_g6_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
798
799 /*
800 * We check that the regmap works on this very first access,
801 * but as this is an MMIO-backed regmap, subsequent regmap
802 * access is not going to fail and we skip error checks from
803 * this point.
804 */
805 map = syscon_node_to_regmap(np);
806 if (IS_ERR(map)) {
807 pr_err("no syscon regmap\n");
808 return;
809 }
810
811 aspeed_g6_cc(map);
812 aspeed_g6_clk_data->num = ASPEED_G6_NUM_CLKS;
813 ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_g6_clk_data);
814 if (ret)
815 pr_err("failed to add DT provider: %d\n", ret);
816};
817CLK_OF_DECLARE_DRIVER(aspeed_cc_g6, "aspeed,ast2600-scu", aspeed_g6_cc_init);