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u-boot/arch/arm/mach-tegra/tegra210/xusb-padctl.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

456 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
*/
#define pr_fmt(fmt) "tegra-xusb-padctl: " fmt
#include <common.h>
#include <errno.h>
#include <dm/of_access.h>
#include <dm/ofnode.h>
#include "../xusb-padctl-common.h"
#include <asm/arch/clock.h>
#include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
DECLARE_GLOBAL_DATA_PTR;
enum tegra210_function {
TEGRA210_FUNC_SNPS,
TEGRA210_FUNC_XUSB,
TEGRA210_FUNC_UART,
TEGRA210_FUNC_PCIE_X1,
TEGRA210_FUNC_PCIE_X4,
TEGRA210_FUNC_USB3,
TEGRA210_FUNC_SATA,
TEGRA210_FUNC_RSVD,
};
static const char *const tegra210_functions[] = {
"snps",
"xusb",
"uart",
"pcie-x1",
"pcie-x4",
"usb3",
"sata",
"rsvd",
};
static const unsigned int tegra210_otg_functions[] = {
TEGRA210_FUNC_SNPS,
TEGRA210_FUNC_XUSB,
TEGRA210_FUNC_UART,
TEGRA210_FUNC_RSVD,
};
static const unsigned int tegra210_usb_functions[] = {
TEGRA210_FUNC_SNPS,
TEGRA210_FUNC_XUSB,
};
static const unsigned int tegra210_pci_functions[] = {
TEGRA210_FUNC_PCIE_X1,
TEGRA210_FUNC_USB3,
TEGRA210_FUNC_SATA,
TEGRA210_FUNC_PCIE_X4,
};
#define TEGRA210_LANE(_name, _offset, _shift, _mask, _iddq, _funcs) \
{ \
.name = _name, \
.offset = _offset, \
.shift = _shift, \
.mask = _mask, \
.iddq = _iddq, \
.num_funcs = ARRAY_SIZE(tegra210_##_funcs##_functions), \
.funcs = tegra210_##_funcs##_functions, \
}
static const struct tegra_xusb_padctl_lane tegra210_lanes[] = {
TEGRA210_LANE("otg-0", 0x004, 0, 0x3, 0, otg),
TEGRA210_LANE("otg-1", 0x004, 2, 0x3, 0, otg),
TEGRA210_LANE("otg-2", 0x004, 4, 0x3, 0, otg),
TEGRA210_LANE("otg-3", 0x004, 6, 0x3, 0, otg),
TEGRA210_LANE("usb2-bias", 0x004, 18, 0x3, 0, otg),
TEGRA210_LANE("hsic-0", 0x004, 14, 0x1, 0, usb),
TEGRA210_LANE("hsic-1", 0x004, 15, 0x1, 0, usb),
TEGRA210_LANE("pcie-0", 0x028, 12, 0x3, 1, pci),
TEGRA210_LANE("pcie-1", 0x028, 14, 0x3, 2, pci),
TEGRA210_LANE("pcie-2", 0x028, 16, 0x3, 3, pci),
TEGRA210_LANE("pcie-3", 0x028, 18, 0x3, 4, pci),
TEGRA210_LANE("pcie-4", 0x028, 20, 0x3, 5, pci),
TEGRA210_LANE("pcie-5", 0x028, 22, 0x3, 6, pci),
TEGRA210_LANE("pcie-6", 0x028, 24, 0x3, 7, pci),
TEGRA210_LANE("sata-0", 0x028, 30, 0x3, 8, pci),
};
#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) {
pr_err("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;
}
if (!(value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE)) {
debug(" timeout\n");
return -ETIMEDOUT;
}
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;
}
if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE) {
debug(" timeout\n");
return -ETIMEDOUT;
}
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;
}
if (!(value & XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS)) {
debug(" timeout\n");
return -ETIMEDOUT;
}
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;
}
if (!(value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE)) {
debug(" timeout\n");
return -ETIMEDOUT;
}
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;
}
if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE) {
debug(" timeout\n");
return -ETIMEDOUT;
}
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_phy tegra210_phys[] = {
{
.type = TEGRA_XUSB_PADCTL_PCIE,
.ops = &pcie_phy_ops,
.padctl = &padctl,
},
};
static const struct tegra_xusb_padctl_soc tegra210_socdata = {
.lanes = tegra210_lanes,
.num_lanes = ARRAY_SIZE(tegra210_lanes),
.functions = tegra210_functions,
.num_functions = ARRAY_SIZE(tegra210_functions),
.phys = tegra210_phys,
.num_phys = ARRAY_SIZE(tegra210_phys),
};
void tegra_xusb_padctl_init(void)
{
ofnode nodes[1];
int count = 0;
int ret;
debug("%s: start\n", __func__);
if (of_live_active()) {
struct device_node *np = of_find_compatible_node(NULL, NULL,
"nvidia,tegra210-xusb-padctl");
debug("np=%p\n", np);
if (np) {
nodes[0] = np_to_ofnode(np);
count = 1;
}
} else {
int node_offsets[1];
int i;
count = fdtdec_find_aliases_for_id(gd->fdt_blob, "padctl",
COMPAT_NVIDIA_TEGRA210_XUSB_PADCTL,
node_offsets, ARRAY_SIZE(node_offsets));
for (i = 0; i < count; i++)
nodes[i] = offset_to_ofnode(node_offsets[i]);
}
ret = tegra_xusb_process_nodes(nodes, count, &tegra210_socdata);
debug("%s: done, ret=%d\n", __func__, ret);
}
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