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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/* AST2600 revision: A0, A1, A2, etc */
55static u8 soc_rev;
56
57/*
58 * Clocks marked with CLK_IS_CRITICAL:
59 *
60 * ref0 and ref1 are essential for the SoC to operate
61 * mpll is required if SDRAM is used
62 */
63static const struct aspeed_gate_data aspeed_g6_gates[] = {
64 /* clk rst name parent flags */
65 [ASPEED_CLK_GATE_MCLK] = { 0, -1, "mclk-gate", "mpll", CLK_IS_CRITICAL }, /* SDRAM */
66 [ASPEED_CLK_GATE_ECLK] = { 1, 6, "eclk-gate", "eclk", 0 }, /* Video Engine */
67 [ASPEED_CLK_GATE_GCLK] = { 2, 7, "gclk-gate", NULL, 0 }, /* 2D engine */
68 /* vclk parent - dclk/d1clk/hclk/mclk */
69 [ASPEED_CLK_GATE_VCLK] = { 3, -1, "vclk-gate", NULL, 0 }, /* Video Capture */
70 [ASPEED_CLK_GATE_BCLK] = { 4, 8, "bclk-gate", "bclk", 0 }, /* PCIe/PCI */
71 /* From dpll */
72 [ASPEED_CLK_GATE_DCLK] = { 5, -1, "dclk-gate", NULL, CLK_IS_CRITICAL }, /* DAC */
73 [ASPEED_CLK_GATE_REF0CLK] = { 6, -1, "ref0clk-gate", "clkin", CLK_IS_CRITICAL },
74 [ASPEED_CLK_GATE_USBPORT2CLK] = { 7, 3, "usb-port2-gate", NULL, 0 }, /* USB2.0 Host port 2 */
75 /* Reserved 8 */
76 [ASPEED_CLK_GATE_USBUHCICLK] = { 9, 15, "usb-uhci-gate", NULL, 0 }, /* USB1.1 (requires port 2 enabled) */
77 /* From dpll/epll/40mhz usb p1 phy/gpioc6/dp phy pll */
78 [ASPEED_CLK_GATE_D1CLK] = { 10, 13, "d1clk-gate", "d1clk", 0 }, /* GFX CRT */
79 /* Reserved 11/12 */
80 [ASPEED_CLK_GATE_YCLK] = { 13, 4, "yclk-gate", NULL, 0 }, /* HAC */
81 [ASPEED_CLK_GATE_USBPORT1CLK] = { 14, 14, "usb-port1-gate", NULL, 0 }, /* USB2 hub/USB2 host port 1/USB1.1 dev */
82 [ASPEED_CLK_GATE_UART5CLK] = { 15, -1, "uart5clk-gate", "uart", 0 }, /* UART5 */
83 /* Reserved 16/19 */
84 [ASPEED_CLK_GATE_MAC1CLK] = { 20, 11, "mac1clk-gate", "mac12", 0 }, /* MAC1 */
85 [ASPEED_CLK_GATE_MAC2CLK] = { 21, 12, "mac2clk-gate", "mac12", 0 }, /* MAC2 */
86 /* Reserved 22/23 */
87 [ASPEED_CLK_GATE_RSACLK] = { 24, 4, "rsaclk-gate", NULL, 0 }, /* HAC */
88 [ASPEED_CLK_GATE_RVASCLK] = { 25, 9, "rvasclk-gate", NULL, 0 }, /* RVAS */
89 /* Reserved 26 */
90 [ASPEED_CLK_GATE_EMMCCLK] = { 27, 16, "emmcclk-gate", NULL, 0 }, /* For card clk */
91 /* Reserved 28/29/30 */
92 [ASPEED_CLK_GATE_LCLK] = { 32, 32, "lclk-gate", NULL, 0 }, /* LPC */
93 [ASPEED_CLK_GATE_ESPICLK] = { 33, -1, "espiclk-gate", NULL, 0 }, /* eSPI */
94 [ASPEED_CLK_GATE_REF1CLK] = { 34, -1, "ref1clk-gate", "clkin", CLK_IS_CRITICAL },
95 /* Reserved 35 */
96 [ASPEED_CLK_GATE_SDCLK] = { 36, 56, "sdclk-gate", NULL, 0 }, /* SDIO/SD */
97 [ASPEED_CLK_GATE_LHCCLK] = { 37, -1, "lhclk-gate", "lhclk", 0 }, /* LPC master/LPC+ */
98 /* Reserved 38 RSA: no longer used */
99 /* Reserved 39 */
100 [ASPEED_CLK_GATE_I3C0CLK] = { 40, 40, "i3c0clk-gate", NULL, 0 }, /* I3C0 */
101 [ASPEED_CLK_GATE_I3C1CLK] = { 41, 41, "i3c1clk-gate", NULL, 0 }, /* I3C1 */
102 [ASPEED_CLK_GATE_I3C2CLK] = { 42, 42, "i3c2clk-gate", NULL, 0 }, /* I3C2 */
103 [ASPEED_CLK_GATE_I3C3CLK] = { 43, 43, "i3c3clk-gate", NULL, 0 }, /* I3C3 */
104 [ASPEED_CLK_GATE_I3C4CLK] = { 44, 44, "i3c4clk-gate", NULL, 0 }, /* I3C4 */
105 [ASPEED_CLK_GATE_I3C5CLK] = { 45, 45, "i3c5clk-gate", NULL, 0 }, /* I3C5 */
106 [ASPEED_CLK_GATE_I3C6CLK] = { 46, 46, "i3c6clk-gate", NULL, 0 }, /* I3C6 */
107 [ASPEED_CLK_GATE_I3C7CLK] = { 47, 47, "i3c7clk-gate", NULL, 0 }, /* I3C7 */
108 [ASPEED_CLK_GATE_UART1CLK] = { 48, -1, "uart1clk-gate", "uart", 0 }, /* UART1 */
109 [ASPEED_CLK_GATE_UART2CLK] = { 49, -1, "uart2clk-gate", "uart", 0 }, /* UART2 */
110 [ASPEED_CLK_GATE_UART3CLK] = { 50, -1, "uart3clk-gate", "uart", 0 }, /* UART3 */
111 [ASPEED_CLK_GATE_UART4CLK] = { 51, -1, "uart4clk-gate", "uart", 0 }, /* UART4 */
112 [ASPEED_CLK_GATE_MAC3CLK] = { 52, 52, "mac3clk-gate", "mac34", 0 }, /* MAC3 */
113 [ASPEED_CLK_GATE_MAC4CLK] = { 53, 53, "mac4clk-gate", "mac34", 0 }, /* MAC4 */
114 [ASPEED_CLK_GATE_UART6CLK] = { 54, -1, "uart6clk-gate", "uartx", 0 }, /* UART6 */
115 [ASPEED_CLK_GATE_UART7CLK] = { 55, -1, "uart7clk-gate", "uartx", 0 }, /* UART7 */
116 [ASPEED_CLK_GATE_UART8CLK] = { 56, -1, "uart8clk-gate", "uartx", 0 }, /* UART8 */
117 [ASPEED_CLK_GATE_UART9CLK] = { 57, -1, "uart9clk-gate", "uartx", 0 }, /* UART9 */
118 [ASPEED_CLK_GATE_UART10CLK] = { 58, -1, "uart10clk-gate", "uartx", 0 }, /* UART10 */
119 [ASPEED_CLK_GATE_UART11CLK] = { 59, -1, "uart11clk-gate", "uartx", 0 }, /* UART11 */
120 [ASPEED_CLK_GATE_UART12CLK] = { 60, -1, "uart12clk-gate", "uartx", 0 }, /* UART12 */
121 [ASPEED_CLK_GATE_UART13CLK] = { 61, -1, "uart13clk-gate", "uartx", 0 }, /* UART13 */
122 [ASPEED_CLK_GATE_FSICLK] = { 62, 59, "fsiclk-gate", NULL, 0 }, /* FSI */
123};
124
125static const struct clk_div_table ast2600_eclk_div_table[] = {
126 { 0x0, 2 },
127 { 0x1, 2 },
128 { 0x2, 3 },
129 { 0x3, 4 },
130 { 0x4, 5 },
131 { 0x5, 6 },
132 { 0x6, 7 },
133 { 0x7, 8 },
134 { 0 }
135};
136
137static const struct clk_div_table ast2600_emmc_extclk_div_table[] = {
138 { 0x0, 2 },
139 { 0x1, 4 },
140 { 0x2, 6 },
141 { 0x3, 8 },
142 { 0x4, 10 },
143 { 0x5, 12 },
144 { 0x6, 14 },
145 { 0x7, 16 },
146 { 0 }
147};
148
149static const struct clk_div_table ast2600_mac_div_table[] = {
150 { 0x0, 4 },
151 { 0x1, 4 },
152 { 0x2, 6 },
153 { 0x3, 8 },
154 { 0x4, 10 },
155 { 0x5, 12 },
156 { 0x6, 14 },
157 { 0x7, 16 },
158 { 0 }
159};
160
161static const struct clk_div_table ast2600_div_table[] = {
162 { 0x0, 4 },
163 { 0x1, 8 },
164 { 0x2, 12 },
165 { 0x3, 16 },
166 { 0x4, 20 },
167 { 0x5, 24 },
168 { 0x6, 28 },
169 { 0x7, 32 },
170 { 0 }
171};
172
173/* For hpll/dpll/epll/mpll */
174static struct clk_hw *ast2600_calc_pll(const char *name, u32 val)
175{
176 unsigned int mult, div;
177
178 if (val & BIT(24)) {
179 /* Pass through mode */
180 mult = div = 1;
181 } else {
182 /* F = 25Mhz * [(M + 2) / (n + 1)] / (p + 1) */
183 u32 m = val & 0x1fff;
184 u32 n = (val >> 13) & 0x3f;
185 u32 p = (val >> 19) & 0xf;
186 mult = (m + 1) / (n + 1);
187 div = (p + 1);
188 }
189 return clk_hw_register_fixed_factor(NULL, name, "clkin", 0,
190 mult, div);
191};
192
193static struct clk_hw *ast2600_calc_apll(const char *name, u32 val)
194{
195 unsigned int mult, div;
196
197 if (soc_rev >= 2) {
198 if (val & BIT(24)) {
199 /* Pass through mode */
200 mult = div = 1;
201 } else {
202 /* F = 25Mhz * [(m + 1) / (n + 1)] / (p + 1) */
203 u32 m = val & 0x1fff;
204 u32 n = (val >> 13) & 0x3f;
205 u32 p = (val >> 19) & 0xf;
206
207 mult = (m + 1);
208 div = (n + 1) * (p + 1);
209 }
210 } else {
211 if (val & BIT(20)) {
212 /* Pass through mode */
213 mult = div = 1;
214 } else {
215 /* F = 25Mhz * (2-od) * [(m + 2) / (n + 1)] */
216 u32 m = (val >> 5) & 0x3f;
217 u32 od = (val >> 4) & 0x1;
218 u32 n = val & 0xf;
219
220 mult = (2 - od) * (m + 2);
221 div = n + 1;
222 }
223 }
224 return clk_hw_register_fixed_factor(NULL, name, "clkin", 0,
225 mult, div);
226};
227
228static u32 get_bit(u8 idx)
229{
230 return BIT(idx % 32);
231}
232
233static u32 get_reset_reg(struct aspeed_clk_gate *gate)
234{
235 if (gate->reset_idx < 32)
236 return ASPEED_G6_RESET_CTRL;
237
238 return ASPEED_G6_RESET_CTRL2;
239}
240
241static u32 get_clock_reg(struct aspeed_clk_gate *gate)
242{
243 if (gate->clock_idx < 32)
244 return ASPEED_G6_CLK_STOP_CTRL;
245
246 return ASPEED_G6_CLK_STOP_CTRL2;
247}
248
249static int aspeed_g6_clk_is_enabled(struct clk_hw *hw)
250{
251 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
252 u32 clk = get_bit(gate->clock_idx);
253 u32 rst = get_bit(gate->reset_idx);
254 u32 reg;
255 u32 enval;
256
257 /*
258 * If the IP is in reset, treat the clock as not enabled,
259 * this happens with some clocks such as the USB one when
260 * coming from cold reset. Without this, aspeed_clk_enable()
261 * will fail to lift the reset.
262 */
263 if (gate->reset_idx >= 0) {
264 regmap_read(gate->map, get_reset_reg(gate), ®);
265
266 if (reg & rst)
267 return 0;
268 }
269
270 regmap_read(gate->map, get_clock_reg(gate), ®);
271
272 enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? 0 : clk;
273
274 return ((reg & clk) == enval) ? 1 : 0;
275}
276
277static int aspeed_g6_clk_enable(struct clk_hw *hw)
278{
279 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
280 unsigned long flags;
281 u32 clk = get_bit(gate->clock_idx);
282 u32 rst = get_bit(gate->reset_idx);
283
284 spin_lock_irqsave(gate->lock, flags);
285
286 if (aspeed_g6_clk_is_enabled(hw)) {
287 spin_unlock_irqrestore(gate->lock, flags);
288 return 0;
289 }
290
291 if (gate->reset_idx >= 0) {
292 /* Put IP in reset */
293 regmap_write(gate->map, get_reset_reg(gate), rst);
294 /* Delay 100us */
295 udelay(100);
296 }
297
298 /* Enable clock */
299 if (gate->flags & CLK_GATE_SET_TO_DISABLE) {
300 /* Clock is clear to enable, so use set to clear register */
301 regmap_write(gate->map, get_clock_reg(gate) + 0x04, clk);
302 } else {
303 /* Clock is set to enable, so use write to set register */
304 regmap_write(gate->map, get_clock_reg(gate), clk);
305 }
306
307 if (gate->reset_idx >= 0) {
308 /* A delay of 10ms is specified by the ASPEED docs */
309 mdelay(10);
310 /* Take IP out of reset */
311 regmap_write(gate->map, get_reset_reg(gate) + 0x4, rst);
312 }
313
314 spin_unlock_irqrestore(gate->lock, flags);
315
316 return 0;
317}
318
319static void aspeed_g6_clk_disable(struct clk_hw *hw)
320{
321 struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
322 unsigned long flags;
323 u32 clk = get_bit(gate->clock_idx);
324
325 spin_lock_irqsave(gate->lock, flags);
326
327 if (gate->flags & CLK_GATE_SET_TO_DISABLE) {
328 regmap_write(gate->map, get_clock_reg(gate), clk);
329 } else {
330 /* Use set to clear register */
331 regmap_write(gate->map, get_clock_reg(gate) + 0x4, clk);
332 }
333
334 spin_unlock_irqrestore(gate->lock, flags);
335}
336
337static const struct clk_ops aspeed_g6_clk_gate_ops = {
338 .enable = aspeed_g6_clk_enable,
339 .disable = aspeed_g6_clk_disable,
340 .is_enabled = aspeed_g6_clk_is_enabled,
341};
342
343static int aspeed_g6_reset_deassert(struct reset_controller_dev *rcdev,
344 unsigned long id)
345{
346 struct aspeed_reset *ar = to_aspeed_reset(rcdev);
347 u32 rst = get_bit(id);
348 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
349
350 /* Use set to clear register */
351 return regmap_write(ar->map, reg + 0x04, rst);
352}
353
354static int aspeed_g6_reset_assert(struct reset_controller_dev *rcdev,
355 unsigned long id)
356{
357 struct aspeed_reset *ar = to_aspeed_reset(rcdev);
358 u32 rst = get_bit(id);
359 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
360
361 return regmap_write(ar->map, reg, rst);
362}
363
364static int aspeed_g6_reset_status(struct reset_controller_dev *rcdev,
365 unsigned long id)
366{
367 struct aspeed_reset *ar = to_aspeed_reset(rcdev);
368 int ret;
369 u32 val;
370 u32 rst = get_bit(id);
371 u32 reg = id >= 32 ? ASPEED_G6_RESET_CTRL2 : ASPEED_G6_RESET_CTRL;
372
373 ret = regmap_read(ar->map, reg, &val);
374 if (ret)
375 return ret;
376
377 return !!(val & rst);
378}
379
380static const struct reset_control_ops aspeed_g6_reset_ops = {
381 .assert = aspeed_g6_reset_assert,
382 .deassert = aspeed_g6_reset_deassert,
383 .status = aspeed_g6_reset_status,
384};
385
386static struct clk_hw *aspeed_g6_clk_hw_register_gate(struct device *dev,
387 const char *name, const char *parent_name, unsigned long flags,
388 struct regmap *map, u8 clock_idx, u8 reset_idx,
389 u8 clk_gate_flags, spinlock_t *lock)
390{
391 struct aspeed_clk_gate *gate;
392 struct clk_init_data init;
393 struct clk_hw *hw;
394 int ret;
395
396 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
397 if (!gate)
398 return ERR_PTR(-ENOMEM);
399
400 init.name = name;
401 init.ops = &aspeed_g6_clk_gate_ops;
402 init.flags = flags;
403 init.parent_names = parent_name ? &parent_name : NULL;
404 init.num_parents = parent_name ? 1 : 0;
405
406 gate->map = map;
407 gate->clock_idx = clock_idx;
408 gate->reset_idx = reset_idx;
409 gate->flags = clk_gate_flags;
410 gate->lock = lock;
411 gate->hw.init = &init;
412
413 hw = &gate->hw;
414 ret = clk_hw_register(dev, hw);
415 if (ret) {
416 kfree(gate);
417 hw = ERR_PTR(ret);
418 }
419
420 return hw;
421}
422
423static const char *const emmc_extclk_parent_names[] = {
424 "emmc_extclk_hpll_in",
425 "mpll",
426};
427
428static const char * const vclk_parent_names[] = {
429 "dpll",
430 "d1pll",
431 "hclk",
432 "mclk",
433};
434
435static const char * const d1clk_parent_names[] = {
436 "dpll",
437 "epll",
438 "usb-phy-40m",
439 "gpioc6_clkin",
440 "dp_phy_pll",
441};
442
443static int aspeed_g6_clk_probe(struct platform_device *pdev)
444{
445 struct device *dev = &pdev->dev;
446 struct aspeed_reset *ar;
447 struct regmap *map;
448 struct clk_hw *hw;
449 u32 val, rate;
450 int i, ret;
451
452 map = syscon_node_to_regmap(dev->of_node);
453 if (IS_ERR(map)) {
454 dev_err(dev, "no syscon regmap\n");
455 return PTR_ERR(map);
456 }
457
458 ar = devm_kzalloc(dev, sizeof(*ar), GFP_KERNEL);
459 if (!ar)
460 return -ENOMEM;
461
462 ar->map = map;
463
464 ar->rcdev.owner = THIS_MODULE;
465 ar->rcdev.nr_resets = 64;
466 ar->rcdev.ops = &aspeed_g6_reset_ops;
467 ar->rcdev.of_node = dev->of_node;
468
469 ret = devm_reset_controller_register(dev, &ar->rcdev);
470 if (ret) {
471 dev_err(dev, "could not register reset controller\n");
472 return ret;
473 }
474
475 /* UART clock div13 setting */
476 regmap_read(map, ASPEED_G6_MISC_CTRL, &val);
477 if (val & UART_DIV13_EN)
478 rate = 24000000 / 13;
479 else
480 rate = 24000000;
481 hw = clk_hw_register_fixed_rate(dev, "uart", NULL, 0, rate);
482 if (IS_ERR(hw))
483 return PTR_ERR(hw);
484 aspeed_g6_clk_data->hws[ASPEED_CLK_UART] = hw;
485
486 /* UART6~13 clock div13 setting */
487 regmap_read(map, 0x80, &val);
488 if (val & BIT(31))
489 rate = 24000000 / 13;
490 else
491 rate = 24000000;
492 hw = clk_hw_register_fixed_rate(dev, "uartx", NULL, 0, rate);
493 if (IS_ERR(hw))
494 return PTR_ERR(hw);
495 aspeed_g6_clk_data->hws[ASPEED_CLK_UARTX] = hw;
496
497 /* EMMC ext clock */
498 hw = clk_hw_register_fixed_factor(dev, "emmc_extclk_hpll_in", "hpll",
499 0, 1, 2);
500 if (IS_ERR(hw))
501 return PTR_ERR(hw);
502
503 hw = clk_hw_register_mux(dev, "emmc_extclk_mux",
504 emmc_extclk_parent_names,
505 ARRAY_SIZE(emmc_extclk_parent_names), 0,
506 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 11, 1,
507 0, &aspeed_g6_clk_lock);
508 if (IS_ERR(hw))
509 return PTR_ERR(hw);
510
511 hw = clk_hw_register_gate(dev, "emmc_extclk_gate", "emmc_extclk_mux",
512 0, scu_g6_base + ASPEED_G6_CLK_SELECTION1,
513 15, 0, &aspeed_g6_clk_lock);
514 if (IS_ERR(hw))
515 return PTR_ERR(hw);
516
517 hw = clk_hw_register_divider_table(dev, "emmc_extclk",
518 "emmc_extclk_gate", 0,
519 scu_g6_base +
520 ASPEED_G6_CLK_SELECTION1, 12,
521 3, 0, ast2600_emmc_extclk_div_table,
522 &aspeed_g6_clk_lock);
523 if (IS_ERR(hw))
524 return PTR_ERR(hw);
525 aspeed_g6_clk_data->hws[ASPEED_CLK_EMMC] = hw;
526
527 /* SD/SDIO clock divider and gate */
528 hw = clk_hw_register_gate(dev, "sd_extclk_gate", "hpll", 0,
529 scu_g6_base + ASPEED_G6_CLK_SELECTION4, 31, 0,
530 &aspeed_g6_clk_lock);
531 if (IS_ERR(hw))
532 return PTR_ERR(hw);
533 hw = clk_hw_register_divider_table(dev, "sd_extclk", "sd_extclk_gate",
534 0, scu_g6_base + ASPEED_G6_CLK_SELECTION4, 28, 3, 0,
535 ast2600_div_table,
536 &aspeed_g6_clk_lock);
537 if (IS_ERR(hw))
538 return PTR_ERR(hw);
539 aspeed_g6_clk_data->hws[ASPEED_CLK_SDIO] = hw;
540
541 /* MAC1/2 RMII 50MHz RCLK */
542 hw = clk_hw_register_fixed_rate(dev, "mac12rclk", "hpll", 0, 50000000);
543 if (IS_ERR(hw))
544 return PTR_ERR(hw);
545
546 /* MAC1/2 AHB bus clock divider */
547 hw = clk_hw_register_divider_table(dev, "mac12", "hpll", 0,
548 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 16, 3, 0,
549 ast2600_mac_div_table,
550 &aspeed_g6_clk_lock);
551 if (IS_ERR(hw))
552 return PTR_ERR(hw);
553 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC12] = hw;
554
555 /* RMII1 50MHz (RCLK) output enable */
556 hw = clk_hw_register_gate(dev, "mac1rclk", "mac12rclk", 0,
557 scu_g6_base + ASPEED_MAC12_CLK_DLY, 29, 0,
558 &aspeed_g6_clk_lock);
559 if (IS_ERR(hw))
560 return PTR_ERR(hw);
561 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC1RCLK] = hw;
562
563 /* RMII2 50MHz (RCLK) output enable */
564 hw = clk_hw_register_gate(dev, "mac2rclk", "mac12rclk", 0,
565 scu_g6_base + ASPEED_MAC12_CLK_DLY, 30, 0,
566 &aspeed_g6_clk_lock);
567 if (IS_ERR(hw))
568 return PTR_ERR(hw);
569 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC2RCLK] = hw;
570
571 /* MAC1/2 RMII 50MHz RCLK */
572 hw = clk_hw_register_fixed_rate(dev, "mac34rclk", "hclk", 0, 50000000);
573 if (IS_ERR(hw))
574 return PTR_ERR(hw);
575
576 /* MAC3/4 AHB bus clock divider */
577 hw = clk_hw_register_divider_table(dev, "mac34", "hpll", 0,
578 scu_g6_base + 0x310, 24, 3, 0,
579 ast2600_mac_div_table,
580 &aspeed_g6_clk_lock);
581 if (IS_ERR(hw))
582 return PTR_ERR(hw);
583 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC34] = hw;
584
585 /* RMII3 50MHz (RCLK) output enable */
586 hw = clk_hw_register_gate(dev, "mac3rclk", "mac34rclk", 0,
587 scu_g6_base + ASPEED_MAC34_CLK_DLY, 29, 0,
588 &aspeed_g6_clk_lock);
589 if (IS_ERR(hw))
590 return PTR_ERR(hw);
591 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC3RCLK] = hw;
592
593 /* RMII4 50MHz (RCLK) output enable */
594 hw = clk_hw_register_gate(dev, "mac4rclk", "mac34rclk", 0,
595 scu_g6_base + ASPEED_MAC34_CLK_DLY, 30, 0,
596 &aspeed_g6_clk_lock);
597 if (IS_ERR(hw))
598 return PTR_ERR(hw);
599 aspeed_g6_clk_data->hws[ASPEED_CLK_MAC4RCLK] = hw;
600
601 /* LPC Host (LHCLK) clock divider */
602 hw = clk_hw_register_divider_table(dev, "lhclk", "hpll", 0,
603 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0,
604 ast2600_div_table,
605 &aspeed_g6_clk_lock);
606 if (IS_ERR(hw))
607 return PTR_ERR(hw);
608 aspeed_g6_clk_data->hws[ASPEED_CLK_LHCLK] = hw;
609
610 /* gfx d1clk : use dp clk */
611 regmap_update_bits(map, ASPEED_G6_CLK_SELECTION1, GENMASK(10, 8), BIT(10));
612 /* SoC Display clock selection */
613 hw = clk_hw_register_mux(dev, "d1clk", d1clk_parent_names,
614 ARRAY_SIZE(d1clk_parent_names), 0,
615 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 8, 3, 0,
616 &aspeed_g6_clk_lock);
617 if (IS_ERR(hw))
618 return PTR_ERR(hw);
619 aspeed_g6_clk_data->hws[ASPEED_CLK_D1CLK] = hw;
620
621 /* d1 clk div 0x308[17:15] x [14:12] - 8,7,6,5,4,3,2,1 */
622 regmap_write(map, 0x308, 0x12000); /* 3x3 = 9 */
623
624 /* P-Bus (BCLK) clock divider */
625 hw = clk_hw_register_divider_table(dev, "bclk", "epll", 0,
626 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 20, 3, 0,
627 ast2600_div_table,
628 &aspeed_g6_clk_lock);
629 if (IS_ERR(hw))
630 return PTR_ERR(hw);
631 aspeed_g6_clk_data->hws[ASPEED_CLK_BCLK] = hw;
632
633 /* Video Capture clock selection */
634 hw = clk_hw_register_mux(dev, "vclk", vclk_parent_names,
635 ARRAY_SIZE(vclk_parent_names), 0,
636 scu_g6_base + ASPEED_G6_CLK_SELECTION2, 12, 3, 0,
637 &aspeed_g6_clk_lock);
638 if (IS_ERR(hw))
639 return PTR_ERR(hw);
640 aspeed_g6_clk_data->hws[ASPEED_CLK_VCLK] = hw;
641
642 /* Video Engine clock divider */
643 hw = clk_hw_register_divider_table(dev, "eclk", NULL, 0,
644 scu_g6_base + ASPEED_G6_CLK_SELECTION1, 28, 3, 0,
645 ast2600_eclk_div_table,
646 &aspeed_g6_clk_lock);
647 if (IS_ERR(hw))
648 return PTR_ERR(hw);
649 aspeed_g6_clk_data->hws[ASPEED_CLK_ECLK] = hw;
650
651 for (i = 0; i < ARRAY_SIZE(aspeed_g6_gates); i++) {
652 const struct aspeed_gate_data *gd = &aspeed_g6_gates[i];
653 u32 gate_flags;
654
655 /*
656 * Special case: the USB port 1 clock (bit 14) is always
657 * working the opposite way from the other ones.
658 */
659 gate_flags = (gd->clock_idx == 14) ? 0 : CLK_GATE_SET_TO_DISABLE;
660 hw = aspeed_g6_clk_hw_register_gate(dev,
661 gd->name,
662 gd->parent_name,
663 gd->flags,
664 map,
665 gd->clock_idx,
666 gd->reset_idx,
667 gate_flags,
668 &aspeed_g6_clk_lock);
669 if (IS_ERR(hw))
670 return PTR_ERR(hw);
671 aspeed_g6_clk_data->hws[i] = hw;
672 }
673
674 return 0;
675};
676
677static const struct of_device_id aspeed_g6_clk_dt_ids[] = {
678 { .compatible = "aspeed,ast2600-scu" },
679 { }
680};
681
682static struct platform_driver aspeed_g6_clk_driver = {
683 .probe = aspeed_g6_clk_probe,
684 .driver = {
685 .name = "ast2600-clk",
686 .of_match_table = aspeed_g6_clk_dt_ids,
687 .suppress_bind_attrs = true,
688 },
689};
690builtin_platform_driver(aspeed_g6_clk_driver);
691
692static const u32 ast2600_a0_axi_ahb_div_table[] = {
693 2, 2, 3, 5,
694};
695
696static const u32 ast2600_a1_axi_ahb_div0_tbl[] = {
697 3, 2, 3, 4,
698};
699
700static const u32 ast2600_a1_axi_ahb_div1_tbl[] = {
701 3, 4, 6, 8,
702};
703
704static const u32 ast2600_a1_axi_ahb200_tbl[] = {
705 3, 4, 3, 4, 2, 2, 2, 2,
706};
707
708static void __init aspeed_g6_cc(struct regmap *map)
709{
710 struct clk_hw *hw;
711 u32 val, div, divbits, axi_div, ahb_div;
712
713 clk_hw_register_fixed_rate(NULL, "clkin", NULL, 0, 25000000);
714
715 /*
716 * High-speed PLL clock derived from the crystal. This the CPU clock,
717 * and we assume that it is enabled
718 */
719 regmap_read(map, ASPEED_HPLL_PARAM, &val);
720 aspeed_g6_clk_data->hws[ASPEED_CLK_HPLL] = ast2600_calc_pll("hpll", val);
721
722 regmap_read(map, ASPEED_MPLL_PARAM, &val);
723 aspeed_g6_clk_data->hws[ASPEED_CLK_MPLL] = ast2600_calc_pll("mpll", val);
724
725 regmap_read(map, ASPEED_DPLL_PARAM, &val);
726 aspeed_g6_clk_data->hws[ASPEED_CLK_DPLL] = ast2600_calc_pll("dpll", val);
727
728 regmap_read(map, ASPEED_EPLL_PARAM, &val);
729 aspeed_g6_clk_data->hws[ASPEED_CLK_EPLL] = ast2600_calc_pll("epll", val);
730
731 regmap_read(map, ASPEED_APLL_PARAM, &val);
732 aspeed_g6_clk_data->hws[ASPEED_CLK_APLL] = ast2600_calc_apll("apll", val);
733
734 /* Strap bits 12:11 define the AXI/AHB clock frequency ratio (aka HCLK)*/
735 regmap_read(map, ASPEED_G6_STRAP1, &val);
736 if (val & BIT(16))
737 axi_div = 1;
738 else
739 axi_div = 2;
740
741 divbits = (val >> 11) & 0x3;
742 if (soc_rev >= 1) {
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 soc_rev = (readl(scu_g6_base + ASPEED_G6_SILICON_REV) & CHIP_REVISION_ID) >> 16;
788
789 aspeed_g6_clk_data = kzalloc(struct_size(aspeed_g6_clk_data, hws,
790 ASPEED_G6_NUM_CLKS), GFP_KERNEL);
791 if (!aspeed_g6_clk_data)
792 return;
793
794 /*
795 * This way all clocks fetched before the platform device probes,
796 * except those we assign here for early use, will be deferred.
797 */
798 for (i = 0; i < ASPEED_G6_NUM_CLKS; i++)
799 aspeed_g6_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
800
801 /*
802 * We check that the regmap works on this very first access,
803 * but as this is an MMIO-backed regmap, subsequent regmap
804 * access is not going to fail and we skip error checks from
805 * this point.
806 */
807 map = syscon_node_to_regmap(np);
808 if (IS_ERR(map)) {
809 pr_err("no syscon regmap\n");
810 return;
811 }
812
813 aspeed_g6_cc(map);
814 aspeed_g6_clk_data->num = ASPEED_G6_NUM_CLKS;
815 ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_g6_clk_data);
816 if (ret)
817 pr_err("failed to add DT provider: %d\n", ret);
818};
819CLK_OF_DECLARE_DRIVER(aspeed_cc_g6, "aspeed,ast2600-scu", aspeed_g6_cc_init);