*/
#include <dt-bindings/phy/phy.h>
+#include <dt-bindings/phy/phy-cadence-torrent.h>
#include <linux/clk.h>
+#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#define CMN_PLLSM1_PLLLOCK_TMR 0x0034U
#define CMN_CDIAG_CDB_PWRI_OVRD 0x0041U
#define CMN_CDIAG_XCVRC_PWRI_OVRD 0x0047U
+#define CMN_CDIAG_REFCLK_OVRD 0x004CU
+#define CMN_CDIAG_REFCLK_DRV0_CTRL 0x0050U
#define CMN_BGCAL_INIT_TMR 0x0064U
#define CMN_BGCAL_ITER_TMR 0x0065U
#define CMN_IBCAL_INIT_TMR 0x0074U
#define RX_DIAG_ACYA 0x01FFU
/* PHY PCS common registers */
+#define PHY_PIPE_CMN_CTRL1 0x0000U
#define PHY_PLL_CFG 0x000EU
#define PHY_PIPE_USB3_GEN2_PRE_CFG0 0x0020U
#define PHY_PIPE_USB3_GEN2_POST_CFG0 0x0022U
#define PHY_PMA_CMN_CTRL2 0x0001U
#define PHY_PMA_PLL_RAW_CTRL 0x0003U
+static const char * const clk_names[] = {
+ [CDNS_TORRENT_REFCLK_DRIVER] = "refclk-driver",
+};
+
static const struct reg_field phy_pll_cfg =
REG_FIELD(PHY_PLL_CFG, 0, 1);
static const struct reg_field phy_reset_ctrl =
REG_FIELD(PHY_RESET, 8, 8);
+static const struct reg_field phy_pipe_cmn_ctrl1_0 = REG_FIELD(PHY_PIPE_CMN_CTRL1, 0, 0);
+
+#define REFCLK_OUT_NUM_CMN_CONFIG 5
+
+enum cdns_torrent_refclk_out_cmn {
+ CMN_CDIAG_REFCLK_OVRD_4,
+ CMN_CDIAG_REFCLK_DRV0_CTRL_1,
+ CMN_CDIAG_REFCLK_DRV0_CTRL_4,
+ CMN_CDIAG_REFCLK_DRV0_CTRL_5,
+ CMN_CDIAG_REFCLK_DRV0_CTRL_6,
+};
+
+static const struct reg_field refclk_out_cmn_cfg[] = {
+ [CMN_CDIAG_REFCLK_OVRD_4] = REG_FIELD(CMN_CDIAG_REFCLK_OVRD, 4, 4),
+ [CMN_CDIAG_REFCLK_DRV0_CTRL_1] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 1, 1),
+ [CMN_CDIAG_REFCLK_DRV0_CTRL_4] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 4, 4),
+ [CMN_CDIAG_REFCLK_DRV0_CTRL_5] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 5, 5),
+ [CMN_CDIAG_REFCLK_DRV0_CTRL_6] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 6, 6),
+};
+
enum cdns_torrent_phy_type {
TYPE_NONE,
TYPE_DP,
struct regmap_field *phy_pma_cmn_ctrl_2;
struct regmap_field *phy_pma_pll_raw_ctrl;
struct regmap_field *phy_reset_ctrl;
+ struct clk *clks[CDNS_TORRENT_REFCLK_DRIVER + 1];
+ struct clk_onecell_data clk_data;
};
enum phy_powerstate {
POWERSTATE_A3 = 3,
};
+struct cdns_torrent_derived_refclk {
+ struct clk_hw hw;
+ struct regmap_field *phy_pipe_cmn_ctrl1_0;
+ struct regmap_field *cmn_fields[REFCLK_OUT_NUM_CMN_CONFIG];
+ struct clk_init_data clk_data;
+};
+
+#define to_cdns_torrent_derived_refclk(_hw) \
+ container_of(_hw, struct cdns_torrent_derived_refclk, hw)
+
static int cdns_torrent_phy_init(struct phy *phy);
static int cdns_torrent_dp_init(struct phy *phy);
static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy,
return ret;
}
+static int cdns_torrent_derived_refclk_enable(struct clk_hw *hw)
+{
+ struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
+
+ regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_6], 0);
+ regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_4], 1);
+ regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_5], 1);
+ regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_1], 0);
+ regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_OVRD_4], 1);
+ regmap_field_write(derived_refclk->phy_pipe_cmn_ctrl1_0, 1);
+
+ return 0;
+}
+
+static void cdns_torrent_derived_refclk_disable(struct clk_hw *hw)
+{
+ struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
+
+ regmap_field_write(derived_refclk->phy_pipe_cmn_ctrl1_0, 0);
+}
+
+static int cdns_torrent_derived_refclk_is_enabled(struct clk_hw *hw)
+{
+ struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
+ int val;
+
+ regmap_field_read(derived_refclk->phy_pipe_cmn_ctrl1_0, &val);
+
+ return !!val;
+}
+
+static const struct clk_ops cdns_torrent_derived_refclk_ops = {
+ .enable = cdns_torrent_derived_refclk_enable,
+ .disable = cdns_torrent_derived_refclk_disable,
+ .is_enabled = cdns_torrent_derived_refclk_is_enabled,
+};
+
+static int cdns_torrent_derived_refclk_register(struct cdns_torrent_phy *cdns_phy)
+{
+ struct cdns_torrent_derived_refclk *derived_refclk;
+ struct device *dev = cdns_phy->dev;
+ struct regmap_field *field;
+ struct clk_init_data *init;
+ const char *parent_name;
+ struct regmap *regmap;
+ char clk_name[100];
+ struct clk *clk;
+ int i;
+
+ derived_refclk = devm_kzalloc(dev, sizeof(*derived_refclk), GFP_KERNEL);
+ if (!derived_refclk)
+ return -ENOMEM;
+
+ snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev),
+ clk_names[CDNS_TORRENT_REFCLK_DRIVER]);
+
+ clk = devm_clk_get_optional(dev, "phy_en_refclk");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "No parent clock for derived_refclk\n");
+ return PTR_ERR(clk);
+ }
+
+ init = &derived_refclk->clk_data;
+
+ if (clk) {
+ parent_name = __clk_get_name(clk);
+ init->parent_names = &parent_name;
+ init->num_parents = 1;
+ }
+ init->ops = &cdns_torrent_derived_refclk_ops;
+ init->flags = 0;
+ init->name = clk_name;
+
+ regmap = cdns_phy->regmap_phy_pcs_common_cdb;
+ field = devm_regmap_field_alloc(dev, regmap, phy_pipe_cmn_ctrl1_0);
+ if (IS_ERR(field)) {
+ dev_err(dev, "phy_pipe_cmn_ctrl1_0 reg field init failed\n");
+ return PTR_ERR(field);
+ }
+ derived_refclk->phy_pipe_cmn_ctrl1_0 = field;
+
+ regmap = cdns_phy->regmap_common_cdb;
+ for (i = 0; i < REFCLK_OUT_NUM_CMN_CONFIG; i++) {
+ field = devm_regmap_field_alloc(dev, regmap, refclk_out_cmn_cfg[i]);
+ if (IS_ERR(field)) {
+ dev_err(dev, "CMN reg field init failed\n");
+ return PTR_ERR(field);
+ }
+ derived_refclk->cmn_fields[i] = field;
+ }
+
+ derived_refclk->hw.init = init;
+
+ clk = devm_clk_register(dev, &derived_refclk->hw);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ cdns_phy->clks[CDNS_TORRENT_REFCLK_DRIVER] = clk;
+
+ return 0;
+}
+
static int cdns_torrent_phy_on(struct phy *phy)
{
struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
return 0;
}
+static void cdns_torrent_clk_cleanup(struct cdns_torrent_phy *cdns_phy)
+{
+ struct device *dev = cdns_phy->dev;
+
+ of_clk_del_provider(dev->of_node);
+}
+
+static int cdns_torrent_clk_register(struct cdns_torrent_phy *cdns_phy)
+{
+ struct device *dev = cdns_phy->dev;
+ struct device_node *node = dev->of_node;
+ int ret;
+
+ ret = cdns_torrent_derived_refclk_register(cdns_phy);
+ if (ret) {
+ dev_err(dev, "failed to register derived refclk\n");
+ return ret;
+ }
+
+ cdns_phy->clk_data.clks = cdns_phy->clks;
+ cdns_phy->clk_data.clk_num = CDNS_TORRENT_REFCLK_DRIVER + 1;
+
+ ret = of_clk_add_provider(node, of_clk_src_onecell_get, &cdns_phy->clk_data);
+ if (ret) {
+ dev_err(dev, "Failed to add clock provider: %s\n", node->name);
+ return ret;
+ }
+
+ return 0;
+}
+
static int cdns_torrent_phy_probe(struct platform_device *pdev)
{
struct cdns_torrent_phy *cdns_phy;
if (ret)
return ret;
+ ret = cdns_torrent_clk_register(cdns_phy);
+ if (ret)
+ return ret;
+
ret = clk_prepare_enable(cdns_phy->clk);
if (ret) {
dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
- return ret;
+ goto clk_cleanup;
}
cdns_phy->ref_clk_rate = clk_get_rate(cdns_phy->clk);
if (!(cdns_phy->ref_clk_rate)) {
dev_err(cdns_phy->dev, "Failed to get ref clock rate\n");
- clk_disable_unprepare(cdns_phy->clk);
- return -EINVAL;
+ ret = -EINVAL;
+ goto clk_disable;
}
/* Enable APB */
reset_control_put(cdns_phy->phys[i].lnk_rst);
of_node_put(child);
reset_control_assert(cdns_phy->apb_rst);
+clk_disable:
clk_disable_unprepare(cdns_phy->clk);
+clk_cleanup:
+ cdns_torrent_clk_cleanup(cdns_phy);
return ret;
}
}
clk_disable_unprepare(cdns_phy->clk);
+ cdns_torrent_clk_cleanup(cdns_phy);
return 0;
}
projects / platform / kernel / linux-starfive.git / commitdiff