drivers/clk/mediatek/clk-mt6795-apmixedsys.c

   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
 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
 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
 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 = 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");