1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2016 - 2017 Xilinx, Inc.
11 #include <linux/clk-provider.h>
17 #include <linux/mfd/syscon/xlnx-vcu.h>
23 #include <dt-bindings/clock/xlnx-vcu.h>
29 #define VCU_PLL_CTRL_BYPASS		BIT(3)
34 #define VCU_PLL_CFG_RES			GENMASK(3, 0)
51  * struct xvcu_device - Xilinx VCU init device structure
84  * struct xvcu_pll_cfg - Helper data
102 	{ 25, 3, 10, 3, 63, 1000 },
103 	{ 26, 3, 10, 3, 63, 1000 },
104 	{ 27, 4, 6, 3, 63, 1000 },
105 	{ 28, 4, 6, 3, 63, 1000 },
106 	{ 29, 4, 6, 3, 63, 1000 },
107 	{ 30, 4, 6, 3, 63, 1000 },
108 	{ 31, 6, 1, 3, 63, 1000 },
109 	{ 32, 6, 1, 3, 63, 1000 },
110 	{ 33, 4, 10, 3, 63, 1000 },
111 	{ 34, 5, 6, 3, 63, 1000 },
112 	{ 35, 5, 6, 3, 63, 1000 },
113 	{ 36, 5, 6, 3, 63, 1000 },
114 	{ 37, 5, 6, 3, 63, 1000 },
115 	{ 38, 5, 6, 3, 63, 975 },
116 	{ 39, 3, 12, 3, 63, 950 },
117 	{ 40, 3, 12, 3, 63, 925 },
118 	{ 41, 3, 12, 3, 63, 900 },
119 	{ 42, 3, 12, 3, 63, 875 },
120 	{ 43, 3, 12, 3, 63, 850 },
121 	{ 44, 3, 12, 3, 63, 850 },
122 	{ 45, 3, 12, 3, 63, 825 },
123 	{ 46, 3, 12, 3, 63, 800 },
124 	{ 47, 3, 12, 3, 63, 775 },
125 	{ 48, 3, 12, 3, 63, 775 },
126 	{ 49, 3, 12, 3, 63, 750 },
127 	{ 50, 3, 12, 3, 63, 750 },
128 	{ 51, 3, 2, 3, 63, 725 },
129 	{ 52, 3, 2, 3, 63, 700 },
130 	{ 53, 3, 2, 3, 63, 700 },
131 	{ 54, 3, 2, 3, 63, 675 },
132 	{ 55, 3, 2, 3, 63, 675 },
133 	{ 56, 3, 2, 3, 63, 650 },
134 	{ 57, 3, 2, 3, 63, 650 },
135 	{ 58, 3, 2, 3, 63, 625 },
136 	{ 59, 3, 2, 3, 63, 625 },
137 	{ 60, 3, 2, 3, 63, 625 },
138 	{ 61, 3, 2, 3, 63, 600 },
139 	{ 62, 3, 2, 3, 63, 600 },
140 	{ 63, 3, 2, 3, 63, 600 },
141 	{ 64, 3, 2, 3, 63, 600 },
142 	{ 65, 3, 2, 3, 63, 600 },
143 	{ 66, 3, 2, 3, 63, 600 },
144 	{ 67, 3, 2, 3, 63, 600 },
145 	{ 68, 3, 2, 3, 63, 600 },
146 	{ 69, 3, 2, 3, 63, 600 },
147 	{ 70, 3, 2, 3, 63, 600 },
148 	{ 71, 3, 2, 3, 63, 600 },
149 	{ 72, 3, 2, 3, 63, 600 },
150 	{ 73, 3, 2, 3, 63, 600 },
151 	{ 74, 3, 2, 3, 63, 600 },
152 	{ 75, 3, 2, 3, 63, 600 },
153 	{ 76, 3, 2, 3, 63, 600 },
154 	{ 77, 3, 2, 3, 63, 600 },
155 	{ 78, 3, 2, 3, 63, 600 },
156 	{ 79, 3, 2, 3, 63, 600 },
157 	{ 80, 3, 2, 3, 63, 600 },
158 	{ 81, 3, 2, 3, 63, 600 },
159 	{ 82, 3, 2, 3, 63, 600 },
160 	{ 83, 4, 2, 3, 63, 600 },
161 	{ 84, 4, 2, 3, 63, 600 },
162 	{ 85, 4, 2, 3, 63, 600 },
163 	{ 86, 4, 2, 3, 63, 600 },
164 	{ 87, 4, 2, 3, 63, 600 },
165 	{ 88, 4, 2, 3, 63, 600 },
166 	{ 89, 4, 2, 3, 63, 600 },
167 	{ 90, 4, 2, 3, 63, 600 },
168 	{ 91, 4, 2, 3, 63, 600 },
169 	{ 92, 4, 2, 3, 63, 600 },
170 	{ 93, 4, 2, 3, 63, 600 },
171 	{ 94, 4, 2, 3, 63, 600 },
172 	{ 95, 4, 2, 3, 63, 600 },
173 	{ 96, 4, 2, 3, 63, 600 },
174 	{ 97, 4, 2, 3, 63, 600 },
175 	{ 98, 4, 2, 3, 63, 600 },
176 	{ 99, 4, 2, 3, 63, 600 },
177 	{ 100, 4, 2, 3, 63, 600 },
178 	{ 101, 4, 2, 3, 63, 600 },
179 	{ 102, 4, 2, 3, 63, 600 },
180 	{ 103, 5, 2, 3, 63, 600 },
181 	{ 104, 5, 2, 3, 63, 600 },
182 	{ 105, 5, 2, 3, 63, 600 },
183 	{ 106, 5, 2, 3, 63, 600 },
184 	{ 107, 3, 4, 3, 63, 600 },
185 	{ 108, 3, 4, 3, 63, 600 },
186 	{ 109, 3, 4, 3, 63, 600 },
187 	{ 110, 3, 4, 3, 63, 600 },
188 	{ 111, 3, 4, 3, 63, 600 },
189 	{ 112, 3, 4, 3, 63, 600 },
190 	{ 113, 3, 4, 3, 63, 600 },
191 	{ 114, 3, 4, 3, 63, 600 },
192 	{ 115, 3, 4, 3, 63, 600 },
193 	{ 116, 3, 4, 3, 63, 600 },
194 	{ 117, 3, 4, 3, 63, 600 },
195 	{ 118, 3, 4, 3, 63, 600 },
196 	{ 119, 3, 4, 3, 63, 600 },
197 	{ 120, 3, 4, 3, 63, 600 },
198 	{ 121, 3, 4, 3, 63, 600 },
199 	{ 122, 3, 4, 3, 63, 600 },
200 	{ 123, 3, 4, 3, 63, 600 },
201 	{ 124, 3, 4, 3, 63, 600 },
202 	{ 125, 3, 4, 3, 63, 600 },
206  * xvcu_read - Read from the VCU register space
219  * xvcu_write - Write to the VCU register space
240 	void __iomem *base = pll->reg_base;  in xvcu_pll_wait_for_lock()
251 	return -ETIMEDOUT;  in xvcu_pll_wait_for_lock()
269 		return ERR_PTR(-EINVAL);  in xvcu_register_pll_post()
281 	for (i = 0; i < ARRAY_SIZE(xvcu_pll_cfg) - 1; i++)  in xvcu_find_cfg()
290 	void __iomem *base = pll->reg_base;  in xvcu_pll_set_div()
297 		return -EINVAL;  in xvcu_pll_set_div()
301 	vcu_pll_ctrl |= FIELD_PREP(VCU_PLL_CTRL_FBDIV, cfg->fbdiv);  in xvcu_pll_set_div()
304 	cfg_val = FIELD_PREP(VCU_PLL_CFG_RES, cfg->res) |  in xvcu_pll_set_div()
305 		  FIELD_PREP(VCU_PLL_CFG_CP, cfg->cp) |  in xvcu_pll_set_div()
306 		  FIELD_PREP(VCU_PLL_CFG_LFHF, cfg->lfhf) |  in xvcu_pll_set_div()
307 		  FIELD_PREP(VCU_PLL_CFG_LOCK_CNT, cfg->lock_cnt) |  in xvcu_pll_set_div()
308 		  FIELD_PREP(VCU_PLL_CFG_LOCK_DLY, cfg->lock_dly);  in xvcu_pll_set_div()
320 	req->rate = clamp_t(unsigned long, req->rate, pll->fvco_min,  in xvcu_pll_determine_rate()
321 			    pll->fvco_max);  in xvcu_pll_determine_rate()
323 	feedback_div = DIV_ROUND_CLOSEST_ULL(req->rate, req->best_parent_rate);  in xvcu_pll_determine_rate()
326 	req->rate = req->best_parent_rate * feedback_div;  in xvcu_pll_determine_rate()
335 	void __iomem *base = pll->reg_base;  in xvcu_pll_recalc_rate()
356 	void __iomem *base = pll->reg_base;  in xvcu_pll_enable()
387 	void __iomem *base = pll->reg_base;  in xvcu_pll_disable()
423 		return ERR_PTR(-ENOMEM);  in xvcu_register_pll()
425 	pll->hw.init = &init;  in xvcu_register_pll()
426 	pll->reg_base = reg_base;  in xvcu_register_pll()
427 	pll->fvco_min = FVCO_MIN;  in xvcu_register_pll()
428 	pll->fvco_max = FVCO_MAX;  in xvcu_register_pll()
430 	hw = &pll->hw;  in xvcu_register_pll()
435 	clk_hw_set_rate_range(hw, pll->fvco_min, pll->fvco_max);  in xvcu_register_pll()
460 		return ERR_PTR(-ENOMEM);  in xvcu_clk_hw_register_leaf()
465 		return ERR_PTR(-ENOMEM);  in xvcu_clk_hw_register_leaf()
475 		err = -ENOMEM;  in xvcu_clk_hw_register_leaf()
529 	struct device *dev = xvcu->dev;  in xvcu_register_clock_provider()
534 	void __iomem *reg_base = xvcu->vcu_slcr_ba;  in xvcu_register_clock_provider()
538 		return -ENOMEM;  in xvcu_register_clock_provider()
539 	data->num = CLK_XVCU_NUM_CLOCKS;  in xvcu_register_clock_provider()
540 	hws = data->hws;  in xvcu_register_clock_provider()
542 	xvcu->clk_data = data;  in xvcu_register_clock_provider()
545 			       "vcu_pll", __clk_get_name(xvcu->pll_ref),  in xvcu_register_clock_provider()
549 	xvcu->pll = hw;  in xvcu_register_clock_provider()
551 	hw = xvcu_register_pll_post(dev, "vcu_pll_post", xvcu->pll, reg_base);  in xvcu_register_clock_provider()
554 	xvcu->pll_post = hw;  in xvcu_register_clock_provider()
557 	parent_data[1].hw = xvcu->pll_post;  in xvcu_register_clock_provider()
585 	struct clk_hw_onecell_data *data = xvcu->clk_data;  in xvcu_unregister_clock_provider()
586 	struct clk_hw **hws = data->hws;  in xvcu_unregister_clock_provider()
596 	if (!IS_ERR_OR_NULL(xvcu->pll_post))  in xvcu_unregister_clock_provider()
597 		clk_hw_unregister_fixed_factor(xvcu->pll_post);  in xvcu_unregister_clock_provider()
601  * xvcu_probe - Probe existence of the logicoreIP
616 	xvcu = devm_kzalloc(&pdev->dev, sizeof(*xvcu), GFP_KERNEL);  in xvcu_probe()
618 		return -ENOMEM;  in xvcu_probe()
620 	xvcu->dev = &pdev->dev;  in xvcu_probe()
623 		dev_err(&pdev->dev, "get vcu_slcr memory resource failed.\n");  in xvcu_probe()
624 		return -ENODEV;  in xvcu_probe()
627 	xvcu->vcu_slcr_ba = devm_ioremap(&pdev->dev, res->start,  in xvcu_probe()
629 	if (!xvcu->vcu_slcr_ba) {  in xvcu_probe()
630 		dev_err(&pdev->dev, "vcu_slcr register mapping failed.\n");  in xvcu_probe()
631 		return -ENOMEM;  in xvcu_probe()
634 	xvcu->logicore_reg_ba =  in xvcu_probe()
635 		syscon_regmap_lookup_by_compatible("xlnx,vcu-settings");  in xvcu_probe()
636 	if (IS_ERR(xvcu->logicore_reg_ba)) {  in xvcu_probe()
637 		dev_info(&pdev->dev,  in xvcu_probe()
638 			 "could not find xlnx,vcu-settings: trying direct register access\n");  in xvcu_probe()
643 			dev_err(&pdev->dev, "get logicore memory resource failed.\n");  in xvcu_probe()
644 			return -ENODEV;  in xvcu_probe()
647 		regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));  in xvcu_probe()
649 			dev_err(&pdev->dev, "logicore register mapping failed.\n");  in xvcu_probe()
650 			return -ENOMEM;  in xvcu_probe()
653 		xvcu->logicore_reg_ba =  in xvcu_probe()
654 			devm_regmap_init_mmio(&pdev->dev, regs,  in xvcu_probe()
656 		if (IS_ERR(xvcu->logicore_reg_ba)) {  in xvcu_probe()
657 			dev_err(&pdev->dev, "failed to init regmap\n");  in xvcu_probe()
658 			return PTR_ERR(xvcu->logicore_reg_ba);  in xvcu_probe()
662 	xvcu->aclk = devm_clk_get(&pdev->dev, "aclk");  in xvcu_probe()
663 	if (IS_ERR(xvcu->aclk)) {  in xvcu_probe()
664 		dev_err(&pdev->dev, "Could not get aclk clock\n");  in xvcu_probe()
665 		return PTR_ERR(xvcu->aclk);  in xvcu_probe()
668 	xvcu->pll_ref = devm_clk_get(&pdev->dev, "pll_ref");  in xvcu_probe()
669 	if (IS_ERR(xvcu->pll_ref)) {  in xvcu_probe()
670 		dev_err(&pdev->dev, "Could not get pll_ref clock\n");  in xvcu_probe()
671 		return PTR_ERR(xvcu->pll_ref);  in xvcu_probe()
674 	ret = clk_prepare_enable(xvcu->aclk);  in xvcu_probe()
676 		dev_err(&pdev->dev, "aclk clock enable failed\n");  in xvcu_probe()
685 	xvcu->reset_gpio = devm_gpiod_get_optional(&pdev->dev, "reset",  in xvcu_probe()
687 	if (IS_ERR(xvcu->reset_gpio)) {  in xvcu_probe()
688 		ret = PTR_ERR(xvcu->reset_gpio);  in xvcu_probe()
689 		dev_err_probe(&pdev->dev, ret, "failed to get reset gpio for vcu.\n");  in xvcu_probe()
693 	if (xvcu->reset_gpio) {  in xvcu_probe()
694 		gpiod_set_value(xvcu->reset_gpio, 0);  in xvcu_probe()
697 		gpiod_set_value(xvcu->reset_gpio, 1);  in xvcu_probe()
700 …dev_dbg(&pdev->dev, "No reset gpio info found in dts for VCU. This may result in incorrect functio…  in xvcu_probe()
703 	regmap_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, VCU_GASKET_VALUE);  in xvcu_probe()
707 		dev_err(&pdev->dev, "failed to register clock provider\n");  in xvcu_probe()
711 	dev_set_drvdata(&pdev->dev, xvcu);  in xvcu_probe()
718 	clk_disable_unprepare(xvcu->aclk);  in xvcu_probe()
723  * xvcu_remove - Insert gasket isolation
739 	if (xvcu->reset_gpio) {  in xvcu_remove()
740 		gpiod_set_value(xvcu->reset_gpio, 0);  in xvcu_remove()
743 		gpiod_set_value(xvcu->reset_gpio, 1);  in xvcu_remove()
746 	regmap_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, 0);  in xvcu_remove()
748 	clk_disable_unprepare(xvcu->aclk);  in xvcu_remove()
753 	{ .compatible = "xlnx,vcu-logicoreip-1.0" },
760 		.name           = "xilinx-vcu",