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OpenCloudOS-Kernel/drivers/phy/ti/phy-j721e-wiz.c

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// SPDX-License-Identifier: GPL-2.0
/**
* Wrapper driver for SERDES used in J721E
*
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
* Author: Kishon Vijay Abraham I <kishon@ti.com>
*/
#include <dt-bindings/phy/phy.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/mux/consumer.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset-controller.h>
#include <dt-bindings/phy/phy.h>
#define WIZ_SERDES_CTRL 0x404
#define WIZ_SERDES_TOP_CTRL 0x408
#define WIZ_SERDES_RST 0x40c
#define WIZ_SERDES_TYPEC 0x410
#define WIZ_LANECTL(n) (0x480 + (0x40 * (n)))
#define WIZ_MAX_LANES 4
#define WIZ_MUX_NUM_CLOCKS 3
#define WIZ_DIV_NUM_CLOCKS_16G 2
#define WIZ_DIV_NUM_CLOCKS_10G 1
#define WIZ_SERDES_TYPEC_LN10_SWAP BIT(30)
enum wiz_lane_standard_mode {
LANE_MODE_GEN1,
LANE_MODE_GEN2,
LANE_MODE_GEN3,
LANE_MODE_GEN4,
};
enum wiz_refclk_mux_sel {
PLL0_REFCLK,
PLL1_REFCLK,
REFCLK_DIG,
};
enum wiz_refclk_div_sel {
CMN_REFCLK_DIG_DIV,
CMN_REFCLK1_DIG_DIV,
};
static const struct reg_field por_en = REG_FIELD(WIZ_SERDES_CTRL, 31, 31);
static const struct reg_field phy_reset_n = REG_FIELD(WIZ_SERDES_RST, 31, 31);
static const struct reg_field pll1_refclk_mux_sel =
REG_FIELD(WIZ_SERDES_RST, 29, 29);
static const struct reg_field pll0_refclk_mux_sel =
REG_FIELD(WIZ_SERDES_RST, 28, 28);
static const struct reg_field refclk_dig_sel_16g =
REG_FIELD(WIZ_SERDES_RST, 24, 25);
static const struct reg_field refclk_dig_sel_10g =
REG_FIELD(WIZ_SERDES_RST, 24, 24);
static const struct reg_field pma_cmn_refclk_int_mode =
REG_FIELD(WIZ_SERDES_TOP_CTRL, 28, 29);
static const struct reg_field pma_cmn_refclk_mode =
REG_FIELD(WIZ_SERDES_TOP_CTRL, 30, 31);
static const struct reg_field pma_cmn_refclk_dig_div =
REG_FIELD(WIZ_SERDES_TOP_CTRL, 26, 27);
static const struct reg_field pma_cmn_refclk1_dig_div =
REG_FIELD(WIZ_SERDES_TOP_CTRL, 24, 25);
static const struct reg_field p_enable[WIZ_MAX_LANES] = {
REG_FIELD(WIZ_LANECTL(0), 30, 31),
REG_FIELD(WIZ_LANECTL(1), 30, 31),
REG_FIELD(WIZ_LANECTL(2), 30, 31),
REG_FIELD(WIZ_LANECTL(3), 30, 31),
};
enum p_enable { P_ENABLE = 2, P_ENABLE_FORCE = 1, P_ENABLE_DISABLE = 0 };
static const struct reg_field p_align[WIZ_MAX_LANES] = {
REG_FIELD(WIZ_LANECTL(0), 29, 29),
REG_FIELD(WIZ_LANECTL(1), 29, 29),
REG_FIELD(WIZ_LANECTL(2), 29, 29),
REG_FIELD(WIZ_LANECTL(3), 29, 29),
};
static const struct reg_field p_raw_auto_start[WIZ_MAX_LANES] = {
REG_FIELD(WIZ_LANECTL(0), 28, 28),
REG_FIELD(WIZ_LANECTL(1), 28, 28),
REG_FIELD(WIZ_LANECTL(2), 28, 28),
REG_FIELD(WIZ_LANECTL(3), 28, 28),
};
static const struct reg_field p_standard_mode[WIZ_MAX_LANES] = {
REG_FIELD(WIZ_LANECTL(0), 24, 25),
REG_FIELD(WIZ_LANECTL(1), 24, 25),
REG_FIELD(WIZ_LANECTL(2), 24, 25),
REG_FIELD(WIZ_LANECTL(3), 24, 25),
};
static const struct reg_field typec_ln10_swap =
REG_FIELD(WIZ_SERDES_TYPEC, 30, 30);
struct wiz_clk_mux {
struct clk_hw hw;
struct regmap_field *field;
u32 *table;
struct clk_init_data clk_data;
};
#define to_wiz_clk_mux(_hw) container_of(_hw, struct wiz_clk_mux, hw)
struct wiz_clk_divider {
struct clk_hw hw;
struct regmap_field *field;
struct clk_div_table *table;
struct clk_init_data clk_data;
};
#define to_wiz_clk_div(_hw) container_of(_hw, struct wiz_clk_divider, hw)
struct wiz_clk_mux_sel {
struct regmap_field *field;
u32 table[4];
const char *node_name;
};
struct wiz_clk_div_sel {
struct regmap_field *field;
struct clk_div_table *table;
const char *node_name;
};
static struct wiz_clk_mux_sel clk_mux_sel_16g[] = {
{
/*
* Mux value to be configured for each of the input clocks
* in the order populated in device tree
*/
.table = { 1, 0 },
.node_name = "pll0-refclk",
},
{
.table = { 1, 0 },
.node_name = "pll1-refclk",
},
{
.table = { 1, 3, 0, 2 },
.node_name = "refclk-dig",
},
};
static struct wiz_clk_mux_sel clk_mux_sel_10g[] = {
{
/*
* Mux value to be configured for each of the input clocks
* in the order populated in device tree
*/
.table = { 1, 0 },
.node_name = "pll0-refclk",
},
{
.table = { 1, 0 },
.node_name = "pll1-refclk",
},
{
.table = { 1, 0 },
.node_name = "refclk-dig",
},
};
static struct clk_div_table clk_div_table[] = {
{ .val = 0, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 2, .div = 4, },
{ .val = 3, .div = 8, },
};
static struct wiz_clk_div_sel clk_div_sel[] = {
{
.table = clk_div_table,
.node_name = "cmn-refclk-dig-div",
},
{
.table = clk_div_table,
.node_name = "cmn-refclk1-dig-div",
},
};
enum wiz_type {
J721E_WIZ_16G,
J721E_WIZ_10G,
};
#define WIZ_TYPEC_DIR_DEBOUNCE_MIN 100 /* ms */
#define WIZ_TYPEC_DIR_DEBOUNCE_MAX 1000
struct wiz {
struct regmap *regmap;
enum wiz_type type;
struct wiz_clk_mux_sel *clk_mux_sel;
struct wiz_clk_div_sel *clk_div_sel;
unsigned int clk_div_sel_num;
struct regmap_field *por_en;
struct regmap_field *phy_reset_n;
struct regmap_field *p_enable[WIZ_MAX_LANES];
struct regmap_field *p_align[WIZ_MAX_LANES];
struct regmap_field *p_raw_auto_start[WIZ_MAX_LANES];
struct regmap_field *p_standard_mode[WIZ_MAX_LANES];
struct regmap_field *pma_cmn_refclk_int_mode;
struct regmap_field *pma_cmn_refclk_mode;
struct regmap_field *pma_cmn_refclk_dig_div;
struct regmap_field *pma_cmn_refclk1_dig_div;
struct regmap_field *typec_ln10_swap;
struct device *dev;
u32 num_lanes;
struct platform_device *serdes_pdev;
struct reset_controller_dev wiz_phy_reset_dev;
struct gpio_desc *gpio_typec_dir;
int typec_dir_delay;
u32 lane_phy_type[WIZ_MAX_LANES];
};
static int wiz_reset(struct wiz *wiz)
{
int ret;
ret = regmap_field_write(wiz->por_en, 0x1);
if (ret)
return ret;
mdelay(1);
ret = regmap_field_write(wiz->por_en, 0x0);
if (ret)
return ret;
return 0;
}
static int wiz_mode_select(struct wiz *wiz)
{
u32 num_lanes = wiz->num_lanes;
enum wiz_lane_standard_mode mode;
int ret;
int i;
for (i = 0; i < num_lanes; i++) {
if (wiz->lane_phy_type[i] == PHY_TYPE_DP)
mode = LANE_MODE_GEN1;
else
mode = LANE_MODE_GEN4;
ret = regmap_field_write(wiz->p_standard_mode[i], mode);
if (ret)
return ret;
}
return 0;
}
static int wiz_init_raw_interface(struct wiz *wiz, bool enable)
{
u32 num_lanes = wiz->num_lanes;
int i;
int ret;
for (i = 0; i < num_lanes; i++) {
ret = regmap_field_write(wiz->p_align[i], enable);
if (ret)
return ret;
ret = regmap_field_write(wiz->p_raw_auto_start[i], enable);
if (ret)
return ret;
}
return 0;
}
static int wiz_init(struct wiz *wiz)
{
struct device *dev = wiz->dev;
int ret;
ret = wiz_reset(wiz);
if (ret) {
dev_err(dev, "WIZ reset failed\n");
return ret;
}
ret = wiz_mode_select(wiz);
if (ret) {
dev_err(dev, "WIZ mode select failed\n");
return ret;
}
ret = wiz_init_raw_interface(wiz, true);
if (ret) {
dev_err(dev, "WIZ interface initialization failed\n");
return ret;
}
return 0;
}
static int wiz_regfield_init(struct wiz *wiz)
{
struct wiz_clk_mux_sel *clk_mux_sel;
struct wiz_clk_div_sel *clk_div_sel;
struct regmap *regmap = wiz->regmap;
int num_lanes = wiz->num_lanes;
struct device *dev = wiz->dev;
int i;
wiz->por_en = devm_regmap_field_alloc(dev, regmap, por_en);
if (IS_ERR(wiz->por_en)) {
dev_err(dev, "POR_EN reg field init failed\n");
return PTR_ERR(wiz->por_en);
}
wiz->phy_reset_n = devm_regmap_field_alloc(dev, regmap,
phy_reset_n);
if (IS_ERR(wiz->phy_reset_n)) {
dev_err(dev, "PHY_RESET_N reg field init failed\n");
return PTR_ERR(wiz->phy_reset_n);
}
wiz->pma_cmn_refclk_int_mode =
devm_regmap_field_alloc(dev, regmap, pma_cmn_refclk_int_mode);
if (IS_ERR(wiz->pma_cmn_refclk_int_mode)) {
dev_err(dev, "PMA_CMN_REFCLK_INT_MODE reg field init failed\n");
return PTR_ERR(wiz->pma_cmn_refclk_int_mode);
}
wiz->pma_cmn_refclk_mode =
devm_regmap_field_alloc(dev, regmap, pma_cmn_refclk_mode);
if (IS_ERR(wiz->pma_cmn_refclk_mode)) {
dev_err(dev, "PMA_CMN_REFCLK_MODE reg field init failed\n");
return PTR_ERR(wiz->pma_cmn_refclk_mode);
}
clk_div_sel = &wiz->clk_div_sel[CMN_REFCLK_DIG_DIV];
clk_div_sel->field = devm_regmap_field_alloc(dev, regmap,
pma_cmn_refclk_dig_div);
if (IS_ERR(clk_div_sel->field)) {
dev_err(dev, "PMA_CMN_REFCLK_DIG_DIV reg field init failed\n");
return PTR_ERR(clk_div_sel->field);
}
if (wiz->type == J721E_WIZ_16G) {
clk_div_sel = &wiz->clk_div_sel[CMN_REFCLK1_DIG_DIV];
clk_div_sel->field =
devm_regmap_field_alloc(dev, regmap,
pma_cmn_refclk1_dig_div);
if (IS_ERR(clk_div_sel->field)) {
dev_err(dev, "PMA_CMN_REFCLK1_DIG_DIV reg field init failed\n");
return PTR_ERR(clk_div_sel->field);
}
}
clk_mux_sel = &wiz->clk_mux_sel[PLL0_REFCLK];
clk_mux_sel->field = devm_regmap_field_alloc(dev, regmap,
pll0_refclk_mux_sel);
if (IS_ERR(clk_mux_sel->field)) {
dev_err(dev, "PLL0_REFCLK_SEL reg field init failed\n");
return PTR_ERR(clk_mux_sel->field);
}
clk_mux_sel = &wiz->clk_mux_sel[PLL1_REFCLK];
clk_mux_sel->field = devm_regmap_field_alloc(dev, regmap,
pll1_refclk_mux_sel);
if (IS_ERR(clk_mux_sel->field)) {
dev_err(dev, "PLL1_REFCLK_SEL reg field init failed\n");
return PTR_ERR(clk_mux_sel->field);
}
clk_mux_sel = &wiz->clk_mux_sel[REFCLK_DIG];
if (wiz->type == J721E_WIZ_10G)
clk_mux_sel->field =
devm_regmap_field_alloc(dev, regmap,
refclk_dig_sel_10g);
else
clk_mux_sel->field =
devm_regmap_field_alloc(dev, regmap,
refclk_dig_sel_16g);
if (IS_ERR(clk_mux_sel->field)) {
dev_err(dev, "REFCLK_DIG_SEL reg field init failed\n");
return PTR_ERR(clk_mux_sel->field);
}
for (i = 0; i < num_lanes; i++) {
wiz->p_enable[i] = devm_regmap_field_alloc(dev, regmap,
p_enable[i]);
if (IS_ERR(wiz->p_enable[i])) {
dev_err(dev, "P%d_ENABLE reg field init failed\n", i);
return PTR_ERR(wiz->p_enable[i]);
}
wiz->p_align[i] = devm_regmap_field_alloc(dev, regmap,
p_align[i]);
if (IS_ERR(wiz->p_align[i])) {
dev_err(dev, "P%d_ALIGN reg field init failed\n", i);
return PTR_ERR(wiz->p_align[i]);
}
wiz->p_raw_auto_start[i] =
devm_regmap_field_alloc(dev, regmap, p_raw_auto_start[i]);
if (IS_ERR(wiz->p_raw_auto_start[i])) {
dev_err(dev, "P%d_RAW_AUTO_START reg field init fail\n",
i);
return PTR_ERR(wiz->p_raw_auto_start[i]);
}
wiz->p_standard_mode[i] =
devm_regmap_field_alloc(dev, regmap, p_standard_mode[i]);
if (IS_ERR(wiz->p_standard_mode[i])) {
dev_err(dev, "P%d_STANDARD_MODE reg field init fail\n",
i);
return PTR_ERR(wiz->p_standard_mode[i]);
}
}
wiz->typec_ln10_swap = devm_regmap_field_alloc(dev, regmap,
typec_ln10_swap);
if (IS_ERR(wiz->typec_ln10_swap)) {
dev_err(dev, "LN10_SWAP reg field init failed\n");
return PTR_ERR(wiz->typec_ln10_swap);
}
return 0;
}
static u8 wiz_clk_mux_get_parent(struct clk_hw *hw)
{
struct wiz_clk_mux *mux = to_wiz_clk_mux(hw);
struct regmap_field *field = mux->field;
unsigned int val;
regmap_field_read(field, &val);
return clk_mux_val_to_index(hw, mux->table, 0, val);
}
static int wiz_clk_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct wiz_clk_mux *mux = to_wiz_clk_mux(hw);
struct regmap_field *field = mux->field;
int val;
val = mux->table[index];
return regmap_field_write(field, val);
}
static const struct clk_ops wiz_clk_mux_ops = {
.set_parent = wiz_clk_mux_set_parent,
.get_parent = wiz_clk_mux_get_parent,
};
static int wiz_mux_clk_register(struct wiz *wiz, struct device_node *node,
struct regmap_field *field, u32 *table)
{
struct device *dev = wiz->dev;
struct clk_init_data *init;
const char **parent_names;
unsigned int num_parents;
struct wiz_clk_mux *mux;
char clk_name[100];
struct clk *clk;
int ret;
mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
if (!mux)
return -ENOMEM;
num_parents = of_clk_get_parent_count(node);
if (num_parents < 2) {
dev_err(dev, "SERDES clock must have parents\n");
return -EINVAL;
}
parent_names = devm_kzalloc(dev, (sizeof(char *) * num_parents),
GFP_KERNEL);
if (!parent_names)
return -ENOMEM;
of_clk_parent_fill(node, parent_names, num_parents);
snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev),
node->name);
init = &mux->clk_data;
init->ops = &wiz_clk_mux_ops;
init->flags = CLK_SET_RATE_NO_REPARENT;
init->parent_names = parent_names;
init->num_parents = num_parents;
init->name = clk_name;
mux->field = field;
mux->table = table;
mux->hw.init = init;
clk = devm_clk_register(dev, &mux->hw);
if (IS_ERR(clk))
return PTR_ERR(clk);
ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
if (ret)
dev_err(dev, "Failed to add clock provider: %s\n", clk_name);
return ret;
}
static unsigned long wiz_clk_div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct wiz_clk_divider *div = to_wiz_clk_div(hw);
struct regmap_field *field = div->field;
int val;
regmap_field_read(field, &val);
return divider_recalc_rate(hw, parent_rate, val, div->table, 0x0, 2);
}
static long wiz_clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct wiz_clk_divider *div = to_wiz_clk_div(hw);
return divider_round_rate(hw, rate, prate, div->table, 2, 0x0);
}
static int wiz_clk_div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct wiz_clk_divider *div = to_wiz_clk_div(hw);
struct regmap_field *field = div->field;
int val;
val = divider_get_val(rate, parent_rate, div->table, 2, 0x0);
if (val < 0)
return val;
return regmap_field_write(field, val);
}
static const struct clk_ops wiz_clk_div_ops = {
.recalc_rate = wiz_clk_div_recalc_rate,
.round_rate = wiz_clk_div_round_rate,
.set_rate = wiz_clk_div_set_rate,
};
static int wiz_div_clk_register(struct wiz *wiz, struct device_node *node,
struct regmap_field *field,
struct clk_div_table *table)
{
struct device *dev = wiz->dev;
struct wiz_clk_divider *div;
struct clk_init_data *init;
const char **parent_names;
char clk_name[100];
struct clk *clk;
int ret;
div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
if (!div)
return -ENOMEM;
snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev),
node->name);
parent_names = devm_kzalloc(dev, sizeof(char *), GFP_KERNEL);
if (!parent_names)
return -ENOMEM;
of_clk_parent_fill(node, parent_names, 1);
init = &div->clk_data;
init->ops = &wiz_clk_div_ops;
init->flags = 0;
init->parent_names = parent_names;
init->num_parents = 1;
init->name = clk_name;
div->field = field;
div->table = table;
div->hw.init = init;
clk = devm_clk_register(dev, &div->hw);
if (IS_ERR(clk))
return PTR_ERR(clk);
ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
if (ret)
dev_err(dev, "Failed to add clock provider: %s\n", clk_name);
return ret;
}
static void wiz_clock_cleanup(struct wiz *wiz, struct device_node *node)
{
struct wiz_clk_mux_sel *clk_mux_sel = wiz->clk_mux_sel;
struct device_node *clk_node;
int i;
for (i = 0; i < WIZ_MUX_NUM_CLOCKS; i++) {
clk_node = of_get_child_by_name(node, clk_mux_sel[i].node_name);
of_clk_del_provider(clk_node);
of_node_put(clk_node);
}
}
static int wiz_clock_init(struct wiz *wiz, struct device_node *node)
{
struct wiz_clk_mux_sel *clk_mux_sel = wiz->clk_mux_sel;
struct device *dev = wiz->dev;
struct device_node *clk_node;
const char *node_name;
unsigned long rate;
struct clk *clk;
int ret;
int i;
clk = devm_clk_get(dev, "core_ref_clk");
if (IS_ERR(clk)) {
dev_err(dev, "core_ref_clk clock not found\n");
ret = PTR_ERR(clk);
return ret;
}
rate = clk_get_rate(clk);
if (rate >= 100000000)
regmap_field_write(wiz->pma_cmn_refclk_int_mode, 0x1);
else
regmap_field_write(wiz->pma_cmn_refclk_int_mode, 0x3);
clk = devm_clk_get(dev, "ext_ref_clk");
if (IS_ERR(clk)) {
dev_err(dev, "ext_ref_clk clock not found\n");
ret = PTR_ERR(clk);
return ret;
}
rate = clk_get_rate(clk);
if (rate >= 100000000)
regmap_field_write(wiz->pma_cmn_refclk_mode, 0x0);
else
regmap_field_write(wiz->pma_cmn_refclk_mode, 0x2);
for (i = 0; i < WIZ_MUX_NUM_CLOCKS; i++) {
node_name = clk_mux_sel[i].node_name;
clk_node = of_get_child_by_name(node, node_name);
if (!clk_node) {
dev_err(dev, "Unable to get %s node\n", node_name);
ret = -EINVAL;
goto err;
}
ret = wiz_mux_clk_register(wiz, clk_node, clk_mux_sel[i].field,
clk_mux_sel[i].table);
if (ret) {
dev_err(dev, "Failed to register %s clock\n",
node_name);
of_node_put(clk_node);
goto err;
}
of_node_put(clk_node);
}
for (i = 0; i < wiz->clk_div_sel_num; i++) {
node_name = clk_div_sel[i].node_name;
clk_node = of_get_child_by_name(node, node_name);
if (!clk_node) {
dev_err(dev, "Unable to get %s node\n", node_name);
ret = -EINVAL;
goto err;
}
ret = wiz_div_clk_register(wiz, clk_node, clk_div_sel[i].field,
clk_div_sel[i].table);
if (ret) {
dev_err(dev, "Failed to register %s clock\n",
node_name);
of_node_put(clk_node);
goto err;
}
of_node_put(clk_node);
}
return 0;
err:
wiz_clock_cleanup(wiz, node);
return ret;
}
static int wiz_phy_reset_assert(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct device *dev = rcdev->dev;
struct wiz *wiz = dev_get_drvdata(dev);
int ret = 0;
if (id == 0) {
ret = regmap_field_write(wiz->phy_reset_n, false);
return ret;
}
ret = regmap_field_write(wiz->p_enable[id - 1], P_ENABLE_DISABLE);
return ret;
}
static int wiz_phy_reset_deassert(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct device *dev = rcdev->dev;
struct wiz *wiz = dev_get_drvdata(dev);
int ret;
/* if typec-dir gpio was specified, set LN10 SWAP bit based on that */
if (id == 0 && wiz->gpio_typec_dir) {
if (wiz->typec_dir_delay)
msleep_interruptible(wiz->typec_dir_delay);
if (gpiod_get_value_cansleep(wiz->gpio_typec_dir))
regmap_field_write(wiz->typec_ln10_swap, 1);
else
regmap_field_write(wiz->typec_ln10_swap, 0);
}
if (id == 0) {
ret = regmap_field_write(wiz->phy_reset_n, true);
return ret;
}
if (wiz->lane_phy_type[id - 1] == PHY_TYPE_DP)
ret = regmap_field_write(wiz->p_enable[id - 1], P_ENABLE);
else
ret = regmap_field_write(wiz->p_enable[id - 1], P_ENABLE_FORCE);
return ret;
}
static const struct reset_control_ops wiz_phy_reset_ops = {
.assert = wiz_phy_reset_assert,
.deassert = wiz_phy_reset_deassert,
};
static struct regmap_config wiz_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.fast_io = true,
};
static const struct of_device_id wiz_id_table[] = {
{
.compatible = "ti,j721e-wiz-16g", .data = (void *)J721E_WIZ_16G
},
{
.compatible = "ti,j721e-wiz-10g", .data = (void *)J721E_WIZ_10G
},
{}
};
MODULE_DEVICE_TABLE(of, wiz_id_table);
static int wiz_get_lane_phy_types(struct device *dev, struct wiz *wiz)
{
struct device_node *serdes, *subnode;
serdes = of_get_child_by_name(dev->of_node, "serdes");
if (!serdes) {
dev_err(dev, "%s: Getting \"serdes\"-node failed\n", __func__);
return -EINVAL;
}
for_each_child_of_node(serdes, subnode) {
u32 reg, num_lanes = 1, phy_type = PHY_NONE;
int ret, i;
ret = of_property_read_u32(subnode, "reg", &reg);
if (ret) {
dev_err(dev,
"%s: Reading \"reg\" from \"%s\" failed: %d\n",
__func__, subnode->name, ret);
return ret;
}
of_property_read_u32(subnode, "cdns,num-lanes", &num_lanes);
of_property_read_u32(subnode, "cdns,phy-type", &phy_type);
dev_dbg(dev, "%s: Lanes %u-%u have phy-type %u\n", __func__,
reg, reg + num_lanes - 1, phy_type);
for (i = reg; i < reg + num_lanes; i++)
wiz->lane_phy_type[i] = phy_type;
}
return 0;
}
static int wiz_probe(struct platform_device *pdev)
{
struct reset_controller_dev *phy_reset_dev;
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct platform_device *serdes_pdev;
struct device_node *child_node;
struct regmap *regmap;
struct resource res;
void __iomem *base;
struct wiz *wiz;
u32 num_lanes;
int ret;
wiz = devm_kzalloc(dev, sizeof(*wiz), GFP_KERNEL);
if (!wiz)
return -ENOMEM;
wiz->type = (enum wiz_type)of_device_get_match_data(dev);
child_node = of_get_child_by_name(node, "serdes");
if (!child_node) {
dev_err(dev, "Failed to get SERDES child DT node\n");
return -ENODEV;
}
ret = of_address_to_resource(child_node, 0, &res);
if (ret) {
dev_err(dev, "Failed to get memory resource\n");
goto err_addr_to_resource;
}
base = devm_ioremap(dev, res.start, resource_size(&res));
if (!base) {
ret = -ENOMEM;
goto err_addr_to_resource;
}
regmap = devm_regmap_init_mmio(dev, base, &wiz_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "Failed to initialize regmap\n");
ret = PTR_ERR(regmap);
goto err_addr_to_resource;
}
ret = of_property_read_u32(node, "num-lanes", &num_lanes);
if (ret) {
dev_err(dev, "Failed to read num-lanes property\n");
goto err_addr_to_resource;
}
if (num_lanes > WIZ_MAX_LANES) {
dev_err(dev, "Cannot support %d lanes\n", num_lanes);
ret = -ENODEV;
goto err_addr_to_resource;
}
wiz->gpio_typec_dir = devm_gpiod_get_optional(dev, "typec-dir",
GPIOD_IN);
if (IS_ERR(wiz->gpio_typec_dir)) {
ret = PTR_ERR(wiz->gpio_typec_dir);
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to request typec-dir gpio: %d\n",
ret);
goto err_addr_to_resource;
}
if (wiz->gpio_typec_dir) {
ret = of_property_read_u32(node, "typec-dir-debounce-ms",
&wiz->typec_dir_delay);
if (ret && ret != -EINVAL) {
dev_err(dev, "Invalid typec-dir-debounce property\n");
goto err_addr_to_resource;
}
/* use min. debounce from Type-C spec if not provided in DT */
if (ret == -EINVAL)
wiz->typec_dir_delay = WIZ_TYPEC_DIR_DEBOUNCE_MIN;
if (wiz->typec_dir_delay < WIZ_TYPEC_DIR_DEBOUNCE_MIN ||
wiz->typec_dir_delay > WIZ_TYPEC_DIR_DEBOUNCE_MAX) {
dev_err(dev, "Invalid typec-dir-debounce property\n");
goto err_addr_to_resource;
}
}
ret = wiz_get_lane_phy_types(dev, wiz);
if (ret)
return ret;
wiz->dev = dev;
wiz->regmap = regmap;
wiz->num_lanes = num_lanes;
if (wiz->type == J721E_WIZ_10G)
wiz->clk_mux_sel = clk_mux_sel_10g;
else
wiz->clk_mux_sel = clk_mux_sel_16g;
wiz->clk_div_sel = clk_div_sel;
if (wiz->type == J721E_WIZ_10G)
wiz->clk_div_sel_num = WIZ_DIV_NUM_CLOCKS_10G;
else
wiz->clk_div_sel_num = WIZ_DIV_NUM_CLOCKS_16G;
platform_set_drvdata(pdev, wiz);
ret = wiz_regfield_init(wiz);
if (ret) {
dev_err(dev, "Failed to initialize regfields\n");
goto err_addr_to_resource;
}
phy_reset_dev = &wiz->wiz_phy_reset_dev;
phy_reset_dev->dev = dev;
phy_reset_dev->ops = &wiz_phy_reset_ops,
phy_reset_dev->owner = THIS_MODULE,
phy_reset_dev->of_node = node;
/* Reset for each of the lane and one for the entire SERDES */
phy_reset_dev->nr_resets = num_lanes + 1;
ret = devm_reset_controller_register(dev, phy_reset_dev);
if (ret < 0) {
dev_warn(dev, "Failed to register reset controller\n");
goto err_addr_to_resource;
}
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "pm_runtime_get_sync failed\n");
goto err_get_sync;
}
ret = wiz_clock_init(wiz, node);
if (ret < 0) {
dev_warn(dev, "Failed to initialize clocks\n");
goto err_get_sync;
}
serdes_pdev = of_platform_device_create(child_node, NULL, dev);
if (!serdes_pdev) {
dev_WARN(dev, "Unable to create SERDES platform device\n");
ret = -ENOMEM;
goto err_pdev_create;
}
wiz->serdes_pdev = serdes_pdev;
ret = wiz_init(wiz);
if (ret) {
dev_err(dev, "WIZ initialization failed\n");
goto err_wiz_init;
}
of_node_put(child_node);
return 0;
err_wiz_init:
of_platform_device_destroy(&serdes_pdev->dev, NULL);
err_pdev_create:
wiz_clock_cleanup(wiz, node);
err_get_sync:
pm_runtime_put(dev);
pm_runtime_disable(dev);
err_addr_to_resource:
of_node_put(child_node);
return ret;
}
static int wiz_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct platform_device *serdes_pdev;
struct wiz *wiz;
wiz = dev_get_drvdata(dev);
serdes_pdev = wiz->serdes_pdev;
of_platform_device_destroy(&serdes_pdev->dev, NULL);
wiz_clock_cleanup(wiz, node);
pm_runtime_put(dev);
pm_runtime_disable(dev);
return 0;
}
static struct platform_driver wiz_driver = {
.probe = wiz_probe,
.remove = wiz_remove,
.driver = {
.name = "wiz",
.of_match_table = wiz_id_table,
},
};
module_platform_driver(wiz_driver);
MODULE_AUTHOR("Texas Instruments Inc.");
MODULE_DESCRIPTION("TI J721E WIZ driver");
MODULE_LICENSE("GPL v2");
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