u-boot/arch/arm/mach-tegra/tegra210/xusb-padctl.c
Tom Warren 6c43f6c8d9 ARM: Tegra210: Add SoC code/include files for T210
All based off of Tegra124. As a Tegra210 board is brought
up, these may change a bit to match the HW more closely,
but probably 90% of this is identical to T124.

Note that since T210 is a 64-bit build, it has no SPL
component, and hence no cpu.c for Tegra210.

Signed-off-by: Tom Warren <twarren@nvidia.com>
2015-07-28 10:30:19 -07:00

495 lines
14 KiB
C

/*
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0
*/
#define pr_fmt(fmt) "tegra-xusb-padctl: " fmt
#include <common.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch-tegra/xusb-padctl.h>
#include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
struct tegra_xusb_phy_ops {
int (*prepare)(struct tegra_xusb_phy *phy);
int (*enable)(struct tegra_xusb_phy *phy);
int (*disable)(struct tegra_xusb_phy *phy);
int (*unprepare)(struct tegra_xusb_phy *phy);
};
struct tegra_xusb_phy {
const struct tegra_xusb_phy_ops *ops;
struct tegra_xusb_padctl *padctl;
};
struct tegra_xusb_padctl {
struct fdt_resource regs;
unsigned int enable;
struct tegra_xusb_phy phys[2];
};
static inline u32 padctl_readl(struct tegra_xusb_padctl *padctl,
unsigned long offset)
{
u32 value = readl(padctl->regs.start + offset);
debug("padctl: %08lx > %08x\n", offset, value);
return value;
}
static inline void padctl_writel(struct tegra_xusb_padctl *padctl,
u32 value, unsigned long offset)
{
debug("padctl: %08lx < %08x\n", offset, value);
writel(value, padctl->regs.start + offset);
}
#define XUSB_PADCTL_ELPG_PROGRAM 0x024
#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN (1 << 31)
#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY (1 << 30)
#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN (1 << 29)
static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
{
u32 value;
if (padctl->enable++ > 0)
return 0;
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
udelay(100);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
udelay(100);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
return 0;
}
static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
{
u32 value;
if (padctl->enable == 0) {
error("unbalanced enable/disable");
return 0;
}
if (--padctl->enable > 0)
return 0;
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
udelay(100);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
udelay(100);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
return 0;
}
static int phy_prepare(struct tegra_xusb_phy *phy)
{
int err;
err = tegra_xusb_padctl_enable(phy->padctl);
if (err < 0)
return err;
reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 0);
return 0;
}
static int phy_unprepare(struct tegra_xusb_phy *phy)
{
reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 1);
return tegra_xusb_padctl_disable(phy->padctl);
}
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1 0x360
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV_MASK (0xff << 20)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV(x) (((x) & 0xff) << 20)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_MDIV_MASK (0x3 << 16)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS (1 << 15)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD (1 << 4)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE (1 << 3)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK (0x3 << 1)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP(x) (((x) & 0x3) << 1)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ (1 << 0)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL2 0x364
#define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL_MASK (0xffffff << 4)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL(x) (((x) & 0xffffff) << 4)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD (1 << 2)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE (1 << 1)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN (1 << 0)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL4 0x36c
#define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_EN (1 << 15)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL_MASK (0x3 << 12)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL(x) (((x) & 0x3) << 12)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLKBUF_EN (1 << 8)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLK_SEL_MASK (0xf << 4)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL5 0x370
#define XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL_MASK (0xff << 16)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL(x) (((x) & 0xff) << 16)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL8 0x37c
#define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE (1 << 31)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD (1 << 15)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN (1 << 13)
#define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN (1 << 12)
#define CLK_RST_XUSBIO_PLL_CFG0 0x51c
#define CLK_RST_XUSBIO_PLL_CFG0_SEQ_ENABLE (1 << 24)
#define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_SLEEP_IDDQ (1 << 13)
#define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET (1 << 6)
#define CLK_RST_XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL (1 << 2)
#define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL (1 << 0)
static int pcie_phy_enable(struct tegra_xusb_phy *phy)
{
struct tegra_xusb_padctl *padctl = phy->padctl;
unsigned long start;
u32 value;
debug("> %s(phy=%p)\n", __func__, phy);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL_MASK;
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL(0x136);
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL5);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL_MASK;
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL(0x2a);
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL5);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL_MASK;
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLK_SEL_MASK;
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL(2);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_MDIV_MASK;
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV_MASK;
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV(25);
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
udelay(1);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLKBUF_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
debug(" waiting for calibration\n");
start = get_timer(0);
while (get_timer(start) < 250) {
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE)
break;
}
debug(" done\n");
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
debug(" waiting for calibration to stop\n");
start = get_timer(0);
while (get_timer(start) < 250) {
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
if ((value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE) == 0)
break;
}
debug(" done\n");
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
debug(" waiting for PLL to lock...\n");
start = get_timer(0);
while (get_timer(start) < 250) {
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS)
break;
}
debug(" done\n");
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN;
value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
debug(" waiting for register calibration...\n");
start = get_timer(0);
while (get_timer(start) < 250) {
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE)
break;
}
debug(" done\n");
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
debug(" waiting for register calibration to stop...\n");
start = get_timer(0);
while (get_timer(start) < 250) {
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
if ((value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE) == 0)
break;
}
debug(" done\n");
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value = readl(NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
value &= ~CLK_RST_XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL;
value &= ~CLK_RST_XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL;
value |= CLK_RST_XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET;
value |= CLK_RST_XUSBIO_PLL_CFG0_PADPLL_SLEEP_IDDQ;
writel(value, NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD;
padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
udelay(1);
value = readl(NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
value |= CLK_RST_XUSBIO_PLL_CFG0_SEQ_ENABLE;
writel(value, NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
debug("< %s()\n", __func__);
return 0;
}
static int pcie_phy_disable(struct tegra_xusb_phy *phy)
{
return 0;
}
static const struct tegra_xusb_phy_ops pcie_phy_ops = {
.prepare = phy_prepare,
.enable = pcie_phy_enable,
.disable = pcie_phy_disable,
.unprepare = phy_unprepare,
};
static struct tegra_xusb_padctl *padctl = &(struct tegra_xusb_padctl) {
.phys = {
[0] = {
.ops = &pcie_phy_ops,
},
},
};
static int tegra_xusb_padctl_parse_dt(struct tegra_xusb_padctl *padctl,
const void *fdt, int node)
{
int err;
err = fdt_get_resource(fdt, node, "reg", 0, &padctl->regs);
if (err < 0) {
error("registers not found");
return err;
}
debug("regs: %pa-%pa\n", &padctl->regs.start,
&padctl->regs.end);
return 0;
}
static int process_nodes(const void *fdt, int nodes[], unsigned int count)
{
unsigned int i;
int err;
debug("> %s(fdt=%p, nodes=%p, count=%u)\n", __func__, fdt, nodes,
count);
for (i = 0; i < count; i++) {
enum fdt_compat_id id;
if (!fdtdec_get_is_enabled(fdt, nodes[i]))
continue;
id = fdtdec_lookup(fdt, nodes[i]);
switch (id) {
case COMPAT_NVIDIA_TEGRA124_XUSB_PADCTL:
case COMPAT_NVIDIA_TEGRA210_XUSB_PADCTL:
break;
default:
error("unsupported compatible: %s",
fdtdec_get_compatible(id));
continue;
}
err = tegra_xusb_padctl_parse_dt(padctl, fdt, nodes[i]);
if (err < 0) {
error("failed to parse DT: %d",
err);
continue;
}
/* deassert XUSB padctl reset */
reset_set_enable(PERIPH_ID_XUSB_PADCTL, 0);
/* only a single instance is supported */
break;
}
debug("< %s()\n", __func__);
return 0;
}
struct tegra_xusb_phy *tegra_xusb_phy_get(unsigned int type)
{
struct tegra_xusb_phy *phy = NULL;
switch (type) {
case TEGRA_XUSB_PADCTL_PCIE:
phy = &padctl->phys[0];
phy->padctl = padctl;
break;
}
return phy;
}
int tegra_xusb_phy_prepare(struct tegra_xusb_phy *phy)
{
if (phy && phy->ops && phy->ops->prepare)
return phy->ops->prepare(phy);
return phy ? -ENOSYS : -EINVAL;
}
int tegra_xusb_phy_enable(struct tegra_xusb_phy *phy)
{
if (phy && phy->ops && phy->ops->enable)
return phy->ops->enable(phy);
return phy ? -ENOSYS : -EINVAL;
}
int tegra_xusb_phy_disable(struct tegra_xusb_phy *phy)
{
if (phy && phy->ops && phy->ops->disable)
return phy->ops->disable(phy);
return phy ? -ENOSYS : -EINVAL;
}
int tegra_xusb_phy_unprepare(struct tegra_xusb_phy *phy)
{
if (phy && phy->ops && phy->ops->unprepare)
return phy->ops->unprepare(phy);
return phy ? -ENOSYS : -EINVAL;
}
void tegra_xusb_padctl_init(const void *fdt)
{
int count, nodes[1];
debug("> %s(fdt=%p)\n", __func__, fdt);
count = fdtdec_find_aliases_for_id(fdt, "padctl",
COMPAT_NVIDIA_TEGRA210_XUSB_PADCTL,
nodes, ARRAY_SIZE(nodes));
if (process_nodes(fdt, nodes, count))
return;
count = fdtdec_find_aliases_for_id(fdt, "padctl",
COMPAT_NVIDIA_TEGRA124_XUSB_PADCTL,
nodes, ARRAY_SIZE(nodes));
if (process_nodes(fdt, nodes, count))
return;
debug("< %s()\n", __func__);
}