Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-11 21:52:04 +00:00
Code Issues Packages Projects Releases Wiki Activity
b50e7df946
linux/arch/arm/mach-imx/mach-imx6q.c
Jingchang Lu 08ae964646 ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 
System restart mechanism has been changed with the introduction
of "kernel restart handler call chain support". The imx2 watchdog
based restart handler has been moved to the driver, and these
restart can be removed from the machine layer.

This patch cleans up the device tree version machine reset init with
mxc_arch_reset_init_dt and removes corresponding .restart handler,
for the .init_machine that can be handled by system default after
removing the mxc_arch_reset_init_dt, the .init_machine is also removed.

Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2014-11-22 07:39:36 +08:00

411 lines
9.9 KiB
C
Raw Blame History

/*
* Copyright 2011-2013 Freescale Semiconductor, Inc.
* Copyright 2011 Linaro Ltd.
*
* 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
*/
#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, 0xffffffff,
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 = 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-iomux-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;
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_populate(NULL, of_default_bus_match_table, NULL, parent);
imx_anatop_init();
cpu_is_imx6q() ? imx6q_pm_init() : imx6dl_pm_init();
imx6q_1588_init();
imx6q_axi_init();
}
#define OCOTP_CFG3 0x440
#define OCOTP_CFG3_SPEED_SHIFT 16
#define OCOTP_CFG3_SPEED_1P2GHZ 0x3
#define OCOTP_CFG3_SPEED_996MHZ 0x2
#define OCOTP_CFG3_SPEED_852MHZ 0x1
static void __init imx6q_opp_check_speed_grading(struct device *cpu_dev)
{
struct device_node *np;
void __iomem *base;
u32 val;
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp");
if (!np) {
pr_warn("failed to find ocotp node\n");
return;
}
base = of_iomap(np, 0);
if (!base) {
pr_warn("failed to map ocotp\n");
goto put_node;
}
/*
* SPEED_GRADING[1:0] defines the max speed of ARM:
* 2b'11: 1200000000Hz;
* 2b'10: 996000000Hz;
* 2b'01: 852000000Hz; -- i.MX6Q Only, exclusive with 996MHz.
* 2b'00: 792000000Hz;
* We need to set the max speed of ARM according to fuse map.
*/
val = readl_relaxed(base + OCOTP_CFG3);
val >>= OCOTP_CFG3_SPEED_SHIFT;
val &= 0x3;
if ((val != OCOTP_CFG3_SPEED_1P2GHZ) && cpu_is_imx6q())
if (dev_pm_opp_disable(cpu_dev, 1200000000))
pr_warn("failed to disable 1.2 GHz OPP\n");
if (val < OCOTP_CFG3_SPEED_996MHZ)
if (dev_pm_opp_disable(cpu_dev, 996000000))
pr_warn("failed to disable 996 MHz OPP\n");
if (cpu_is_imx6q()) {
if (val != OCOTP_CFG3_SPEED_852MHZ)
if (dev_pm_opp_disable(cpu_dev, 852000000))
pr_warn("failed to disable 852 MHz OPP\n");
}
put_node:
of_node_put(np);
}
static void __init imx6q_opp_init(void)
{
struct device_node *np;
struct device *cpu_dev = get_cpu_device(0);
if (!cpu_dev) {
pr_warn("failed to get cpu0 device\n");
return;
}
np = of_node_get(cpu_dev->of_node);
if (!np) {
pr_warn("failed to find cpu0 node\n");
return;
}
if (of_init_opp_table(cpu_dev)) {
pr_warn("failed to init OPP table\n");
goto put_node;
}
imx6q_opp_check_speed_grading(cpu_dev);
put_node:
of_node_put(np);
}
static struct platform_device imx6q_cpufreq_pdev = {
.name = "imx6q-cpufreq",
};
static void __init imx6q_init_late(void)
{
/*
* WAIT mode is broken on TO 1.0 and 1.1, so there is no point
* to run cpuidle on them.
*/
if (imx_get_soc_revision() > IMX_CHIP_REVISION_1_1)
imx6q_cpuidle_init();
if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) {
imx6q_opp_init();
platform_device_register(&imx6q_cpufreq_pdev);
}
}
static void __init imx6q_map_io(void)
{
debug_ll_io_init();
imx_scu_map_io();
}
static void __init imx6q_init_irq(void)
{
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();
imx_gpc_init();
irqchip_init();
}
static const char * const imx6q_dt_compat[] __initconst = {
"fsl,imx6dl",
"fsl,imx6q",
NULL,
};
DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
.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
Reference in New Issue View Git Blame Copy Permalink