arch/arm/mach-imx/mach-imx6q.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2011-2013 Freescale Semiconductor, Inc.
   4  * Copyright 2011 Linaro Ltd.
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/irqchip.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/pci.h>
  11 #include <linux/phy.h>
  12 #include <linux/regmap.h>
  13 #include <linux/micrel_phy.h>
  14 #include <linux/mfd/syscon.h>
  15 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18
  19 #include "common.h"
  20 #include "cpuidle.h"
  21 #include "hardware.h"
  22
  23 /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
  24 static int ksz9021rn_phy_fixup(struct phy_device *phydev)
  25 {
  26         if (IS_BUILTIN(CONFIG_PHYLIB)) {
  27                 /* min rx data delay */
  28                 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
  29                         0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
  30                 phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000);
  31
  32                 /* max rx/tx clock delay, min rx/tx control delay */
  33                 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
  34                         0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
  35                 phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0);
  36                 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
  37                         MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
  38         }
  39
  40         return 0;
  41 }
  42
  43 static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val)
  44 {
  45         phy_write(dev, 0x0d, device);
  46         phy_write(dev, 0x0e, reg);
  47         phy_write(dev, 0x0d, (1 << 14) | device);
  48         phy_write(dev, 0x0e, val);
  49 }
  50
  51 static int ksz9031rn_phy_fixup(struct phy_device *dev)
  52 {
  53         /*
  54          * min rx data delay, max rx/tx clock delay,
  55          * min rx/tx control delay
  56          */
  57         mmd_write_reg(dev, 2, 4, 0);
  58         mmd_write_reg(dev, 2, 5, 0);
  59         mmd_write_reg(dev, 2, 8, 0x003ff);
  60
  61         return 0;
  62 }
  63
  64 /*
  65  * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
  66  * as they are used for slots1-7 PERST#
  67  */
  68 static void ventana_pciesw_early_fixup(struct pci_dev *dev)
  69 {
  70         u32 dw;
  71
  72         if (!of_machine_is_compatible("gw,ventana"))
  73                 return;
  74
  75         if (dev->devfn != 0)
  76                 return;
  77
  78         pci_read_config_dword(dev, 0x62c, &dw);
  79         dw |= 0xaaa8; // GPIO1-7 outputs
  80         pci_write_config_dword(dev, 0x62c, dw);
  81
  82         pci_read_config_dword(dev, 0x644, &dw);
  83         dw |= 0xfe;   // GPIO1-7 output high
  84         pci_write_config_dword(dev, 0x644, dw);
  85
  86         msleep(100);
  87 }
  88 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);
  89 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);
  90 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);
  91
  92 static int ar8031_phy_fixup(struct phy_device *dev)
  93 {
  94         u16 val;
  95
  96         /* To enable AR8031 output a 125MHz clk from CLK_25M */
  97         phy_write(dev, 0xd, 0x7);
  98         phy_write(dev, 0xe, 0x8016);
  99         phy_write(dev, 0xd, 0x4007);
 100
 101         val = phy_read(dev, 0xe);
 102         val &= 0xffe3;
 103         val |= 0x18;
 104         phy_write(dev, 0xe, val);
 105
 106         /* introduce tx clock delay */
 107         phy_write(dev, 0x1d, 0x5);
 108         val = phy_read(dev, 0x1e);
 109         val |= 0x0100;
 110         phy_write(dev, 0x1e, val);
 111
 112         return 0;
 113 }
 114
 115 #define PHY_ID_AR8031   0x004dd074
 116
 117 static int ar8035_phy_fixup(struct phy_device *dev)
 118 {
 119         u16 val;
 120
 121         /* Ar803x phy SmartEEE feature cause link status generates glitch,
 122          * which cause ethernet link down/up issue, so disable SmartEEE
 123          */
 124         phy_write(dev, 0xd, 0x3);
 125         phy_write(dev, 0xe, 0x805d);
 126         phy_write(dev, 0xd, 0x4003);
 127
 128         val = phy_read(dev, 0xe);
 129         phy_write(dev, 0xe, val & ~(1 << 8));
 130
 131         /*
 132          * Enable 125MHz clock from CLK_25M on the AR8031.  This
 133          * is fed in to the IMX6 on the ENET_REF_CLK (V22) pad.
 134          * Also, introduce a tx clock delay.
 135          *
 136          * This is the same as is the AR8031 fixup.
 137          */
 138         ar8031_phy_fixup(dev);
 139
 140         /*check phy power*/
 141         val = phy_read(dev, 0x0);
 142         if (val & BMCR_PDOWN)
 143                 phy_write(dev, 0x0, val & ~BMCR_PDOWN);
 144
 145         return 0;
 146 }
 147
 148 #define PHY_ID_AR8035 0x004dd072
 149
 150 static void __init imx6q_enet_phy_init(void)
 151 {
 152         if (IS_BUILTIN(CONFIG_PHYLIB)) {
 153                 phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
 154                                 ksz9021rn_phy_fixup);
 155                 phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
 156                                 ksz9031rn_phy_fixup);
 157                 phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffef,
 158                                 ar8031_phy_fixup);
 159                 phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
 160                                 ar8035_phy_fixup);
 161         }
 162 }
 163
 164 static void __init imx6q_1588_init(void)
 165 {
 166         struct device_node *np;
 167         struct clk *ptp_clk;
 168         struct clk *enet_ref;
 169         struct regmap *gpr;
 170         u32 clksel;
 171
 172         np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-fec");
 173         if (!np) {
 174                 pr_warn("%s: failed to find fec node\n", __func__);
 175                 return;
 176         }
 177
 178         ptp_clk = of_clk_get(np, 2);
 179         if (IS_ERR(ptp_clk)) {
 180                 pr_warn("%s: failed to get ptp clock\n", __func__);
 181                 goto put_node;
 182         }
 183
 184         enet_ref = clk_get_sys(NULL, "enet_ref");
 185         if (IS_ERR(enet_ref)) {
 186                 pr_warn("%s: failed to get enet clock\n", __func__);
 187                 goto put_ptp_clk;
 188         }
 189
 190         /*
 191          * If enet_ref from ANATOP/CCM is the PTP clock source, we need to
 192          * set bit IOMUXC_GPR1[21].  Or the PTP clock must be from pad
 193          * (external OSC), and we need to clear the bit.
 194          */
 195         clksel = clk_is_match(ptp_clk, enet_ref) ?
 196                                 IMX6Q_GPR1_ENET_CLK_SEL_ANATOP :
 197                                 IMX6Q_GPR1_ENET_CLK_SEL_PAD;
 198         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 199         if (!IS_ERR(gpr))
 200                 regmap_update_bits(gpr, IOMUXC_GPR1,
 201                                 IMX6Q_GPR1_ENET_CLK_SEL_MASK,
 202                                 clksel);
 203         else
 204                 pr_err("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
 205
 206         clk_put(enet_ref);
 207 put_ptp_clk:
 208         clk_put(ptp_clk);
 209 put_node:
 210         of_node_put(np);
 211 }
 212
 213 static void __init imx6q_axi_init(void)
 214 {
 215         struct regmap *gpr;
 216         unsigned int mask;
 217
 218         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 219         if (!IS_ERR(gpr)) {
 220                 /*
 221                  * Enable the cacheable attribute of VPU and IPU
 222                  * AXI transactions.
 223                  */
 224                 mask = IMX6Q_GPR4_VPU_WR_CACHE_SEL |
 225                         IMX6Q_GPR4_VPU_RD_CACHE_SEL |
 226                         IMX6Q_GPR4_VPU_P_WR_CACHE_VAL |
 227                         IMX6Q_GPR4_VPU_P_RD_CACHE_VAL_MASK |
 228                         IMX6Q_GPR4_IPU_WR_CACHE_CTL |
 229                         IMX6Q_GPR4_IPU_RD_CACHE_CTL;
 230                 regmap_update_bits(gpr, IOMUXC_GPR4, mask, mask);
 231
 232                 /* Increase IPU read QoS priority */
 233                 regmap_update_bits(gpr, IOMUXC_GPR6,
 234                                 IMX6Q_GPR6_IPU1_ID00_RD_QOS_MASK |
 235                                 IMX6Q_GPR6_IPU1_ID01_RD_QOS_MASK,
 236                                 (0xf << 16) | (0x7 << 20));
 237                 regmap_update_bits(gpr, IOMUXC_GPR7,
 238                                 IMX6Q_GPR7_IPU2_ID00_RD_QOS_MASK |
 239                                 IMX6Q_GPR7_IPU2_ID01_RD_QOS_MASK,
 240                                 (0xf << 16) | (0x7 << 20));
 241         } else {
 242                 pr_warn("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
 243         }
 244 }
 245
 246 static void __init imx6q_init_machine(void)
 247 {
 248         struct device *parent;
 249
 250         if (cpu_is_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_2_0)
 251                 imx_print_silicon_rev("i.MX6QP", IMX_CHIP_REVISION_1_0);
 252         else
 253                 imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q",
 254                                 imx_get_soc_revision());
 255
 256         parent = imx_soc_device_init();
 257         if (parent == NULL)
 258                 pr_warn("failed to initialize soc device\n");
 259
 260         imx6q_enet_phy_init();
 261
 262         of_platform_default_populate(NULL, NULL, parent);
 263
 264         imx_anatop_init();
 265         cpu_is_imx6q() ?  imx6q_pm_init() : imx6dl_pm_init();
 266         imx6q_1588_init();
 267         imx6q_axi_init();
 268 }
 269
 270 static void __init imx6q_init_late(void)
 271 {
 272         /*
 273          * WAIT mode is broken on imx6 Dual/Quad revision 1.0 and 1.1 so
 274          * there is no point to run cpuidle on them.
 275          *
 276          * It does work on imx6 Solo/DualLite starting from 1.1
 277          */
 278         if ((cpu_is_imx6q() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_1) ||
 279             (cpu_is_imx6dl() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_0))
 280                 imx6q_cpuidle_init();
 281
 282         if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
 283                 platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
 284 }
 285
 286 static void __init imx6q_map_io(void)
 287 {
 288         debug_ll_io_init();
 289         imx_scu_map_io();
 290 }
 291
 292 static void __init imx6q_init_irq(void)
 293 {
 294         imx_gpc_check_dt();
 295         imx_init_revision_from_anatop();
 296         imx_init_l2cache();
 297         imx_src_init();
 298         irqchip_init();
 299         imx6_pm_ccm_init("fsl,imx6q-ccm");
 300 }
 301
 302 static const char * const imx6q_dt_compat[] __initconst = {
 303         "fsl,imx6dl",
 304         "fsl,imx6q",
 305         "fsl,imx6qp",
 306         NULL,
 307 };
 308
 309 DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
 310         .l2c_aux_val    = 0,
 311         .l2c_aux_mask   = ~0,
 312         .smp            = smp_ops(imx_smp_ops),
 313         .map_io         = imx6q_map_io,
 314         .init_irq       = imx6q_init_irq,
 315         .init_machine   = imx6q_init_machine,
 316         .init_late      = imx6q_init_late,
 317         .dt_compat      = imx6q_dt_compat,
 318 MACHINE_END