1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2022 Collabora Ltd.
4 * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
5 */
6
7 #include <dt-bindings/clock/mediatek,mt6795-clk.h>
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include "clk-fhctl.h"
11 #include "clk-mtk.h"
12 #include "clk-pll.h"
13 #include "clk-pllfh.h"
14
15 #define REG_REF2USB 0x8
16 #define REG_AP_PLL_CON7 0x1c
17 #define MD1_MTCMOS_OFF BIT(0)
18 #define MD1_MEM_OFF BIT(1)
19 #define MD1_CLK_OFF BIT(4)
20 #define MD1_ISO_OFF BIT(8)
21
22 #define MT6795_PLL_FMAX (3000UL * MHZ)
23 #define MT6795_CON0_EN BIT(0)
24 #define MT6795_CON0_RST_BAR BIT(24)
25
26 #define PLL(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, \
27 _pd_reg, _pd_shift, _tuner_reg, _pcw_reg, _pcw_shift) { \
28 .id = _id, \
29 .name = _name, \
30 .reg = _reg, \
31 .pwr_reg = _pwr_reg, \
32 .en_mask = MT6795_CON0_EN | _en_mask, \
33 .flags = _flags, \
34 .rst_bar_mask = MT6795_CON0_RST_BAR, \
35 .fmax = MT6795_PLL_FMAX, \
36 .pcwbits = _pcwbits, \
37 .pd_reg = _pd_reg, \
38 .pd_shift = _pd_shift, \
39 .tuner_reg = _tuner_reg, \
40 .pcw_reg = _pcw_reg, \
41 .pcw_shift = _pcw_shift, \
42 .div_table = NULL, \
43 .pll_en_bit = 0, \
44 }
45
46 static const struct mtk_pll_data plls[] = {
47 PLL(CLK_APMIXED_ARMCA53PLL, "armca53pll", 0x200, 0x20c, 0, PLL_AO,
48 21, 0x204, 24, 0x0, 0x204, 0),
49 PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x220, 0x22c, 0xf0000101, HAVE_RST_BAR,
50 21, 0x220, 4, 0x0, 0x224, 0),
51 PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x230, 0x23c, 0xfe000101, HAVE_RST_BAR,
52 7, 0x230, 4, 0x0, 0x234, 14),
53 PLL(CLK_APMIXED_MMPLL, "mmpll", 0x240, 0x24c, 0, 0, 21, 0x244, 24, 0x0, 0x244, 0),
54 PLL(CLK_APMIXED_MSDCPLL, "msdcpll", 0x250, 0x25c, 0, 0, 21, 0x250, 4, 0x0, 0x254, 0),
55 PLL(CLK_APMIXED_VENCPLL, "vencpll", 0x260, 0x26c, 0, 0, 21, 0x260, 4, 0x0, 0x264, 0),
56 PLL(CLK_APMIXED_TVDPLL, "tvdpll", 0x270, 0x27c, 0, 0, 21, 0x270, 4, 0x0, 0x274, 0),
57 PLL(CLK_APMIXED_MPLL, "mpll", 0x280, 0x28c, 0, 0, 21, 0x280, 4, 0x0, 0x284, 0),
58 PLL(CLK_APMIXED_VCODECPLL, "vcodecpll", 0x290, 0x29c, 0, 0, 21, 0x290, 4, 0x0, 0x294, 0),
59 PLL(CLK_APMIXED_APLL1, "apll1", 0x2a0, 0x2b0, 0, 0, 31, 0x2a0, 4, 0x2a8, 0x2a4, 0),
60 PLL(CLK_APMIXED_APLL2, "apll2", 0x2b4, 0x2c4, 0, 0, 31, 0x2b4, 4, 0x2bc, 0x2b8, 0),
61 };
62
63 enum fh_pll_id {
64 FH_CA53PLL_LL,
65 FH_CA53PLL_BL,
66 FH_MAINPLL,
67 FH_MPLL,
68 FH_MSDCPLL,
69 FH_MMPLL,
70 FH_VENCPLL,
71 FH_TVDPLL,
72 FH_VCODECPLL,
73 FH_NR_FH,
74 };
75
76 #define _FH(_pllid, _fhid, _slope, _offset) { \
77 .data = { \
78 .pll_id = _pllid, \
79 .fh_id = _fhid, \
80 .fh_ver = FHCTL_PLLFH_V1, \
81 .fhx_offset = _offset, \
82 .dds_mask = GENMASK(21, 0), \
83 .slope0_value = _slope, \
84 .slope1_value = _slope, \
85 .sfstrx_en = BIT(2), \
86 .frddsx_en = BIT(1), \
87 .fhctlx_en = BIT(0), \
88 .tgl_org = BIT(31), \
89 .dvfs_tri = BIT(31), \
90 .pcwchg = BIT(31), \
91 .dt_val = 0x0, \
92 .df_val = 0x9, \
93 .updnlmt_shft = 16, \
94 .msk_frddsx_dys = GENMASK(23, 20), \
95 .msk_frddsx_dts = GENMASK(19, 16), \
96 }, \
97 }
98
99 #define FH(_pllid, _fhid, _offset) _FH(_pllid, _fhid, 0x6003c97, _offset)
100 #define FH_M(_pllid, _fhid, _offset) _FH(_pllid, _fhid, 0x6000140, _offset)
101
102 static struct mtk_pllfh_data pllfhs[] = {
103 FH(CLK_APMIXED_ARMCA53PLL, FH_CA53PLL_BL, 0x38),
104 FH(CLK_APMIXED_MAINPLL, FH_MAINPLL, 0x60),
105 FH_M(CLK_APMIXED_MPLL, FH_MPLL, 0x74),
106 FH(CLK_APMIXED_MSDCPLL, FH_MSDCPLL, 0x88),
107 FH(CLK_APMIXED_MMPLL, FH_MMPLL, 0x9c),
108 FH(CLK_APMIXED_VENCPLL, FH_VENCPLL, 0xb0),
109 FH(CLK_APMIXED_TVDPLL, FH_TVDPLL, 0xc4),
110 FH(CLK_APMIXED_VCODECPLL, FH_VCODECPLL, 0xd8),
111 };
112
clk_mt6795_apmixed_setup_md1(void __iomem * base)113 static void clk_mt6795_apmixed_setup_md1(void __iomem *base)
114 {
115 void __iomem *reg = base + REG_AP_PLL_CON7;
116
117 /* Turn on MD1 internal clock */
118 writel(readl(reg) & ~MD1_CLK_OFF, reg);
119
120 /* Unlock MD1's MTCMOS power path */
121 writel(readl(reg) & ~MD1_MTCMOS_OFF, reg);
122
123 /* Turn on ISO */
124 writel(readl(reg) & ~MD1_ISO_OFF, reg);
125
126 /* Turn on memory */
127 writel(readl(reg) & ~MD1_MEM_OFF, reg);
128 }
129
130 static const struct of_device_id of_match_clk_mt6795_apmixed[] = {
131 { .compatible = "mediatek,mt6795-apmixedsys" },
132 { /* sentinel */ }
133 };
134 MODULE_DEVICE_TABLE(of, of_match_clk_mt6795_apmixed);
135
clk_mt6795_apmixed_probe(struct platform_device * pdev)136 static int clk_mt6795_apmixed_probe(struct platform_device *pdev)
137 {
138 struct clk_hw_onecell_data *clk_data;
139 struct device *dev = &pdev->dev;
140 struct device_node *node = dev->of_node;
141 const u8 *fhctl_node = "mediatek,mt6795-fhctl";
142 void __iomem *base;
143 struct clk_hw *hw;
144 int ret;
145
146 base = devm_platform_ioremap_resource(pdev, 0);
147 if (IS_ERR(base))
148 return PTR_ERR(base);
149
150 clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
151 if (!clk_data)
152 return -ENOMEM;
153
154 fhctl_parse_dt(fhctl_node, pllfhs, ARRAY_SIZE(pllfhs));
155 ret = mtk_clk_register_pllfhs(node, plls, ARRAY_SIZE(plls),
156 pllfhs, ARRAY_SIZE(pllfhs), clk_data);
157 if (ret)
158 goto free_clk_data;
159
160 hw = mtk_clk_register_ref2usb_tx("ref2usb_tx", "clk26m", base + REG_REF2USB);
161 if (IS_ERR(hw)) {
162 ret = PTR_ERR(hw);
163 dev_err(dev, "Failed to register ref2usb_tx: %d\n", ret);
164 goto unregister_plls;
165 }
166 clk_data->hws[CLK_APMIXED_REF2USB_TX] = hw;
167
168 ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
169 if (ret) {
170 dev_err(dev, "Cannot register clock provider: %d\n", ret);
171 goto unregister_ref2usb;
172 }
173
174 /* Setup MD1 to avoid random crashes */
175 dev_dbg(dev, "Performing initial setup for MD1\n");
176 clk_mt6795_apmixed_setup_md1(base);
177
178 return 0;
179
180 unregister_ref2usb:
181 mtk_clk_unregister_ref2usb_tx(clk_data->hws[CLK_APMIXED_REF2USB_TX]);
182 unregister_plls:
183 mtk_clk_unregister_pllfhs(plls, ARRAY_SIZE(plls), pllfhs,
184 ARRAY_SIZE(pllfhs), clk_data);
185 free_clk_data:
186 mtk_free_clk_data(clk_data);
187 return ret;
188 }
189
clk_mt6795_apmixed_remove(struct platform_device * pdev)190 static void clk_mt6795_apmixed_remove(struct platform_device *pdev)
191 {
192 struct device_node *node = pdev->dev.of_node;
193 struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
194
195 of_clk_del_provider(node);
196 mtk_clk_unregister_ref2usb_tx(clk_data->hws[CLK_APMIXED_REF2USB_TX]);
197 mtk_clk_unregister_pllfhs(plls, ARRAY_SIZE(plls), pllfhs,
198 ARRAY_SIZE(pllfhs), clk_data);
199 mtk_free_clk_data(clk_data);
200 }
201
202 static struct platform_driver clk_mt6795_apmixed_drv = {
203 .probe = clk_mt6795_apmixed_probe,
204 .remove_new = clk_mt6795_apmixed_remove,
205 .driver = {
206 .name = "clk-mt6795-apmixed",
207 .of_match_table = of_match_clk_mt6795_apmixed,
208 },
209 };
210 module_platform_driver(clk_mt6795_apmixed_drv);
211
212 MODULE_DESCRIPTION("MediaTek MT6795 apmixed clocks driver");
213 MODULE_LICENSE("GPL");
214