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linux/arch/arm/mach-imx/mach-imx6q.c
Thomas Gleixner fcaf20360a treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 159 
Based on 1 normalized pattern(s):

  the code contained herein is licensed under the gnu general public
  license you may obtain a copy of the gnu general public license
  version 2 or later at the following locations http www opensource
  org licenses gpl license html http www gnu org copyleft gpl html

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 161 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.383790741@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

332 lines
8.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2011-2013 Freescale Semiconductor, Inc.
* Copyright 2011 Linaro Ltd.
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/cpu.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pm_opp.h>
#include <linux/pci.h>
#include <linux/phy.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/micrel_phy.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/system_misc.h>
#include "common.h"
#include "cpuidle.h"
#include "hardware.h"
/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
static int ksz9021rn_phy_fixup(struct phy_device *phydev)
{
if (IS_BUILTIN(CONFIG_PHYLIB)) {
/* min rx data delay */
phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000);
/* max rx/tx clock delay, min rx/tx control delay */
phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0);
phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
}
return 0;
}
static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val)
{
phy_write(dev, 0x0d, device);
phy_write(dev, 0x0e, reg);
phy_write(dev, 0x0d, (1 << 14) | device);
phy_write(dev, 0x0e, val);
}
static int ksz9031rn_phy_fixup(struct phy_device *dev)
{
/*
* min rx data delay, max rx/tx clock delay,
* min rx/tx control delay
*/
mmd_write_reg(dev, 2, 4, 0);
mmd_write_reg(dev, 2, 5, 0);
mmd_write_reg(dev, 2, 8, 0x003ff);
return 0;
}
/*
* fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
* as they are used for slots1-7 PERST#
*/
static void ventana_pciesw_early_fixup(struct pci_dev *dev)
{
u32 dw;
if (!of_machine_is_compatible("gw,ventana"))
return;
if (dev->devfn != 0)
return;
pci_read_config_dword(dev, 0x62c, &dw);
dw |= 0xaaa8; // GPIO1-7 outputs
pci_write_config_dword(dev, 0x62c, dw);
pci_read_config_dword(dev, 0x644, &dw);
dw |= 0xfe; // GPIO1-7 output high
pci_write_config_dword(dev, 0x644, dw);
msleep(100);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);
static int ar8031_phy_fixup(struct phy_device *dev)
{
u16 val;
/* To enable AR8031 output a 125MHz clk from CLK_25M */
phy_write(dev, 0xd, 0x7);
phy_write(dev, 0xe, 0x8016);
phy_write(dev, 0xd, 0x4007);
val = phy_read(dev, 0xe);
val &= 0xffe3;
val |= 0x18;
phy_write(dev, 0xe, val);
/* introduce tx clock delay */
phy_write(dev, 0x1d, 0x5);
val = phy_read(dev, 0x1e);
val |= 0x0100;
phy_write(dev, 0x1e, val);
return 0;
}
#define PHY_ID_AR8031 0x004dd074
static int ar8035_phy_fixup(struct phy_device *dev)
{
u16 val;
/* Ar803x phy SmartEEE feature cause link status generates glitch,
* which cause ethernet link down/up issue, so disable SmartEEE
*/
phy_write(dev, 0xd, 0x3);
phy_write(dev, 0xe, 0x805d);
phy_write(dev, 0xd, 0x4003);
val = phy_read(dev, 0xe);
phy_write(dev, 0xe, val & ~(1 << 8));
/*
* Enable 125MHz clock from CLK_25M on the AR8031. This
* is fed in to the IMX6 on the ENET_REF_CLK (V22) pad.
* Also, introduce a tx clock delay.
*
* This is the same as is the AR8031 fixup.
*/
ar8031_phy_fixup(dev);
/*check phy power*/
val = phy_read(dev, 0x0);
if (val & BMCR_PDOWN)
phy_write(dev, 0x0, val & ~BMCR_PDOWN);
return 0;
}
#define PHY_ID_AR8035 0x004dd072
static void __init imx6q_enet_phy_init(void)
{
if (IS_BUILTIN(CONFIG_PHYLIB)) {
phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
ksz9021rn_phy_fixup);
phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
ksz9031rn_phy_fixup);
phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffef,
ar8031_phy_fixup);
phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
ar8035_phy_fixup);
}
}
static void __init imx6q_1588_init(void)
{
struct device_node *np;
struct clk *ptp_clk;
struct clk *enet_ref;
struct regmap *gpr;
u32 clksel;
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-fec");
if (!np) {
pr_warn("%s: failed to find fec node\n", __func__);
return;
}
ptp_clk = of_clk_get(np, 2);
if (IS_ERR(ptp_clk)) {
pr_warn("%s: failed to get ptp clock\n", __func__);
goto put_node;
}
enet_ref = clk_get_sys(NULL, "enet_ref");
if (IS_ERR(enet_ref)) {
pr_warn("%s: failed to get enet clock\n", __func__);
goto put_ptp_clk;
}
/*
* If enet_ref from ANATOP/CCM is the PTP clock source, we need to
* set bit IOMUXC_GPR1[21]. Or the PTP clock must be from pad
* (external OSC), and we need to clear the bit.
*/
clksel = clk_is_match(ptp_clk, enet_ref) ?
IMX6Q_GPR1_ENET_CLK_SEL_ANATOP :
IMX6Q_GPR1_ENET_CLK_SEL_PAD;
gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
if (!IS_ERR(gpr))
regmap_update_bits(gpr, IOMUXC_GPR1,
IMX6Q_GPR1_ENET_CLK_SEL_MASK,
clksel);
else
pr_err("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
clk_put(enet_ref);
put_ptp_clk:
clk_put(ptp_clk);
put_node:
of_node_put(np);
}
static void __init imx6q_axi_init(void)
{
struct regmap *gpr;
unsigned int mask;
gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
if (!IS_ERR(gpr)) {
/*
* Enable the cacheable attribute of VPU and IPU
* AXI transactions.
*/
mask = IMX6Q_GPR4_VPU_WR_CACHE_SEL |
IMX6Q_GPR4_VPU_RD_CACHE_SEL |
IMX6Q_GPR4_VPU_P_WR_CACHE_VAL |
IMX6Q_GPR4_VPU_P_RD_CACHE_VAL_MASK |
IMX6Q_GPR4_IPU_WR_CACHE_CTL |
IMX6Q_GPR4_IPU_RD_CACHE_CTL;
regmap_update_bits(gpr, IOMUXC_GPR4, mask, mask);
/* Increase IPU read QoS priority */
regmap_update_bits(gpr, IOMUXC_GPR6,
IMX6Q_GPR6_IPU1_ID00_RD_QOS_MASK |
IMX6Q_GPR6_IPU1_ID01_RD_QOS_MASK,
(0xf << 16) | (0x7 << 20));
regmap_update_bits(gpr, IOMUXC_GPR7,
IMX6Q_GPR7_IPU2_ID00_RD_QOS_MASK |
IMX6Q_GPR7_IPU2_ID01_RD_QOS_MASK,
(0xf << 16) | (0x7 << 20));
} else {
pr_warn("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
}
}
static void __init imx6q_init_machine(void)
{
struct device *parent;
if (cpu_is_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_2_0)
imx_print_silicon_rev("i.MX6QP", IMX_CHIP_REVISION_1_0);
else
imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q",
imx_get_soc_revision());
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
imx6q_enet_phy_init();
of_platform_default_populate(NULL, NULL, parent);
imx_anatop_init();
cpu_is_imx6q() ? imx6q_pm_init() : imx6dl_pm_init();
imx6q_1588_init();
imx6q_axi_init();
}
static void __init imx6q_init_late(void)
{
/*
* WAIT mode is broken on imx6 Dual/Quad revision 1.0 and 1.1 so
* there is no point to run cpuidle on them.
*
* It does work on imx6 Solo/DualLite starting from 1.1
*/
if ((cpu_is_imx6q() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_1) ||
(cpu_is_imx6dl() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_0))
imx6q_cpuidle_init();
if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
}
static void __init imx6q_map_io(void)
{
debug_ll_io_init();
imx_scu_map_io();
}
static void __init imx6q_init_irq(void)
{
imx_gpc_check_dt();
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();
irqchip_init();
imx6_pm_ccm_init("fsl,imx6q-ccm");
}
static const char * const imx6q_dt_compat[] __initconst = {
"fsl,imx6dl",
"fsl,imx6q",
"fsl,imx6qp",
NULL,
};
DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
.l2c_aux_val = 0,
.l2c_aux_mask = ~0,
.smp = smp_ops(imx_smp_ops),
.map_io = imx6q_map_io,
.init_irq = imx6q_init_irq,
.init_machine = imx6q_init_machine,
.init_late = imx6q_init_late,
.dt_compat = imx6q_dt_compat,
MACHINE_END
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