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Subject[PATCH 03/13] phy: cadence: Sierra: Use "regmap" for read and write to Sierra registers
Date
Use "regmap" for read and write to Sierra registers. This is in
perparation for adding SERDES_16G support present in TI's J721E
SoC.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/phy/cadence/phy-cadence-sierra.c | 289 ++++++++++++++++++-----
1 file changed, 235 insertions(+), 54 deletions(-)

diff --git a/drivers/phy/cadence/phy-cadence-sierra.c b/drivers/phy/cadence/phy-cadence-sierra.c
index bed68c25682f..d0e7ae1c67b1 100644
--- a/drivers/phy/cadence/phy-cadence-sierra.c
+++ b/drivers/phy/cadence/phy-cadence-sierra.c
@@ -22,49 +22,61 @@
#include <dt-bindings/phy/phy.h>

/* PHY register offsets */
-#define SIERRA_PHY_PLL_CFG (0xc00e << 2)
-#define SIERRA_DET_STANDEC_A (0x4000 << 2)
-#define SIERRA_DET_STANDEC_B (0x4001 << 2)
-#define SIERRA_DET_STANDEC_C (0x4002 << 2)
-#define SIERRA_DET_STANDEC_D (0x4003 << 2)
-#define SIERRA_DET_STANDEC_E (0x4004 << 2)
-#define SIERRA_PSM_LANECAL (0x4008 << 2)
-#define SIERRA_PSM_DIAG (0x4015 << 2)
-#define SIERRA_PSC_TX_A0 (0x4028 << 2)
-#define SIERRA_PSC_TX_A1 (0x4029 << 2)
-#define SIERRA_PSC_TX_A2 (0x402A << 2)
-#define SIERRA_PSC_TX_A3 (0x402B << 2)
-#define SIERRA_PSC_RX_A0 (0x4030 << 2)
-#define SIERRA_PSC_RX_A1 (0x4031 << 2)
-#define SIERRA_PSC_RX_A2 (0x4032 << 2)
-#define SIERRA_PSC_RX_A3 (0x4033 << 2)
-#define SIERRA_PLLCTRL_SUBRATE (0x403A << 2)
-#define SIERRA_PLLCTRL_GEN_D (0x403E << 2)
-#define SIERRA_DRVCTRL_ATTEN (0x406A << 2)
-#define SIERRA_CLKPATHCTRL_TMR (0x4081 << 2)
-#define SIERRA_RX_CREQ_FLTR_A_MODE1 (0x4087 << 2)
-#define SIERRA_RX_CREQ_FLTR_A_MODE0 (0x4088 << 2)
-#define SIERRA_CREQ_CCLKDET_MODE01 (0x408E << 2)
-#define SIERRA_RX_CTLE_MAINTENANCE (0x4091 << 2)
-#define SIERRA_CREQ_FSMCLK_SEL (0x4092 << 2)
-#define SIERRA_CTLELUT_CTRL (0x4098 << 2)
-#define SIERRA_DFE_ECMP_RATESEL (0x40C0 << 2)
-#define SIERRA_DFE_SMP_RATESEL (0x40C1 << 2)
-#define SIERRA_DEQ_VGATUNE_CTRL (0x40E1 << 2)
-#define SIERRA_TMRVAL_MODE3 (0x416E << 2)
-#define SIERRA_TMRVAL_MODE2 (0x416F << 2)
-#define SIERRA_TMRVAL_MODE1 (0x4170 << 2)
-#define SIERRA_TMRVAL_MODE0 (0x4171 << 2)
-#define SIERRA_PICNT_MODE1 (0x4174 << 2)
-#define SIERRA_CPI_OUTBUF_RATESEL (0x417C << 2)
-#define SIERRA_LFPSFILT_NS (0x418A << 2)
-#define SIERRA_LFPSFILT_RD (0x418B << 2)
-#define SIERRA_LFPSFILT_MP (0x418C << 2)
-#define SIERRA_SDFILT_H2L_A (0x4191 << 2)
+#define SIERRA_COMMON_CDB_OFFSET 0x0
+#define SIERRA_MACRO_ID_REG 0x0
+
+#define SIERRA_LANE_CDB_OFFSET(ln, offset) \
+ (0x4000 + ((ln) * (0x800 >> (2 - (offset)))))
+#define SIERRA_DET_STANDEC_A 0x000
+#define SIERRA_DET_STANDEC_B 0x001
+#define SIERRA_DET_STANDEC_C 0x002
+#define SIERRA_DET_STANDEC_D 0x003
+#define SIERRA_DET_STANDEC_E 0x004
+#define SIERRA_PSM_LANECAL 0x008
+#define SIERRA_PSM_DIAG 0x015
+#define SIERRA_PSC_TX_A0 0x028
+#define SIERRA_PSC_TX_A1 0x029
+#define SIERRA_PSC_TX_A2 0x02A
+#define SIERRA_PSC_TX_A3 0x02B
+#define SIERRA_PSC_RX_A0 0x030
+#define SIERRA_PSC_RX_A1 0x031
+#define SIERRA_PSC_RX_A2 0x032
+#define SIERRA_PSC_RX_A3 0x033
+#define SIERRA_PLLCTRL_SUBRATE 0x03A
+#define SIERRA_PLLCTRL_GEN_D 0x03E
+#define SIERRA_DRVCTRL_ATTEN 0x06A
+#define SIERRA_CLKPATHCTRL_TMR 0x081
+#define SIERRA_RX_CREQ_FLTR_A_MODE1 0x087
+#define SIERRA_RX_CREQ_FLTR_A_MODE0 0x088
+#define SIERRA_CREQ_CCLKDET_MODE01 0x08E
+#define SIERRA_RX_CTLE_MAINTENANCE 0x091
+#define SIERRA_CREQ_FSMCLK_SEL 0x092
+#define SIERRA_CTLELUT_CTRL 0x098
+#define SIERRA_DFE_ECMP_RATESEL 0x0C0
+#define SIERRA_DFE_SMP_RATESEL 0x0C1
+#define SIERRA_DEQ_VGATUNE_CTRL 0x0E1
+#define SIERRA_TMRVAL_MODE3 0x16E
+#define SIERRA_TMRVAL_MODE2 0x16F
+#define SIERRA_TMRVAL_MODE1 0x170
+#define SIERRA_TMRVAL_MODE0 0x171
+#define SIERRA_PICNT_MODE1 0x174
+#define SIERRA_CPI_OUTBUF_RATESEL 0x17C
+#define SIERRA_LFPSFILT_NS 0x18A
+#define SIERRA_LFPSFILT_RD 0x18B
+#define SIERRA_LFPSFILT_MP 0x18C
+#define SIERRA_SDFILT_H2L_A 0x191
+
+#define SIERRA_PHY_CONFIG_CTRL_OFFSET 0xc000
+#define SIERRA_PHY_PLL_CFG 0xe

#define SIERRA_MACRO_ID 0x00007364
#define SIERRA_MAX_LANES 4

+static const struct reg_field macro_id_type =
+ REG_FIELD(SIERRA_MACRO_ID_REG, 0, 15);
+static const struct reg_field phy_pll_cfg_1 =
+ REG_FIELD(SIERRA_PHY_PLL_CFG, 1, 1);
+
struct cdns_sierra_inst {
struct phy *phy;
u32 phy_type;
@@ -80,28 +92,93 @@ struct cdns_reg_pairs {

struct cdns_sierra_data {
u32 id_value;
+ u8 block_offset_shift;
+ u8 reg_offset_shift;
u32 pcie_regs;
u32 usb_regs;
struct cdns_reg_pairs *pcie_vals;
struct cdns_reg_pairs *usb_vals;
};

-struct cdns_sierra_phy {
+struct cdns_regmap_cdb_context {
struct device *dev;
void __iomem *base;
+ u8 reg_offset_shift;
+};
+
+struct cdns_sierra_phy {
+ struct device *dev;
+ struct regmap *regmap;
struct cdns_sierra_data *init_data;
struct cdns_sierra_inst phys[SIERRA_MAX_LANES];
struct reset_control *phy_rst;
struct reset_control *apb_rst;
+ struct regmap *regmap_lane_cdb[SIERRA_MAX_LANES];
+ struct regmap *regmap_phy_config_ctrl;
+ struct regmap *regmap_common_cdb;
+ struct regmap_field *macro_id_type;
+ struct regmap_field *phy_pll_cfg_1;
struct clk *clk;
int nsubnodes;
bool autoconf;
};

+static int cdns_regmap_write(void *context, unsigned int reg, unsigned int val)
+{
+ struct cdns_regmap_cdb_context *ctx = context;
+ u32 offset = reg << ctx->reg_offset_shift;
+
+ writew(val, ctx->base + offset);
+
+ return 0;
+}
+
+static int cdns_regmap_read(void *context, unsigned int reg, unsigned int *val)
+{
+ struct cdns_regmap_cdb_context *ctx = context;
+ u32 offset = reg << ctx->reg_offset_shift;
+
+ *val = readw(ctx->base + offset);
+ return 0;
+}
+
+#define SIERRA_LANE_CDB_REGMAP_CONF(n) \
+{ \
+ .name = "sierra_lane" n "_cdb", \
+ .reg_stride = 1, \
+ .fast_io = true, \
+ .reg_write = cdns_regmap_write, \
+ .reg_read = cdns_regmap_read, \
+}
+
+static struct regmap_config cdns_sierra_lane_cdb_config[] = {
+ SIERRA_LANE_CDB_REGMAP_CONF("0"),
+ SIERRA_LANE_CDB_REGMAP_CONF("1"),
+ SIERRA_LANE_CDB_REGMAP_CONF("2"),
+ SIERRA_LANE_CDB_REGMAP_CONF("3"),
+};
+
+static struct regmap_config cdns_sierra_common_cdb_config = {
+ .name = "sierra_common_cdb",
+ .reg_stride = 1,
+ .fast_io = true,
+ .reg_write = cdns_regmap_write,
+ .reg_read = cdns_regmap_read,
+};
+
+static struct regmap_config cdns_sierra_phy_config_ctrl_config = {
+ .name = "sierra_phy_config_ctrl",
+ .reg_stride = 1,
+ .fast_io = true,
+ .reg_write = cdns_regmap_write,
+ .reg_read = cdns_regmap_read,
+};
+
static void cdns_sierra_phy_init(struct phy *gphy)
{
struct cdns_sierra_inst *ins = phy_get_drvdata(gphy);
struct cdns_sierra_phy *phy = dev_get_drvdata(gphy->dev.parent);
+ struct regmap *regmap = phy->regmap;
int i, j;
struct cdns_reg_pairs *vals;
u32 num_regs;
@@ -115,10 +192,12 @@ static void cdns_sierra_phy_init(struct phy *gphy)
} else {
return;
}
- for (i = 0; i < ins->num_lanes; i++)
- for (j = 0; j < num_regs ; j++)
- writel(vals[j].val, phy->base +
- vals[j].off + (i + ins->mlane) * 0x800);
+ for (i = 0; i < ins->num_lanes; i++) {
+ for (j = 0; j < num_regs ; j++) {
+ regmap = phy->regmap_lane_cdb[i + ins->mlane];
+ regmap_write(regmap, vals[j].off, vals[j].val);
+ }
+ }
}

static int cdns_sierra_phy_on(struct phy *gphy)
@@ -159,37 +238,136 @@ static int cdns_sierra_get_optional(struct cdns_sierra_inst *inst,

static const struct of_device_id cdns_sierra_id_table[];

+static struct regmap *cdns_regmap_init(struct device *dev, void __iomem *base,
+ u32 block_offset, u8 block_offset_shift,
+ u8 reg_offset_shift,
+ const struct regmap_config *config)
+{
+ struct cdns_regmap_cdb_context *ctx;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return ERR_PTR(-ENOMEM);
+
+ ctx->dev = dev;
+ ctx->base = base + (block_offset << block_offset_shift);
+ ctx->reg_offset_shift = reg_offset_shift;
+
+ return devm_regmap_init(dev, NULL, ctx, config);
+}
+
+static int cdns_regfield_init(struct cdns_sierra_phy *sp)
+{
+ struct device *dev = sp->dev;
+ struct regmap_field *field;
+ struct regmap *regmap;
+
+ regmap = sp->regmap_common_cdb;
+ field = devm_regmap_field_alloc(dev, regmap, macro_id_type);
+ if (IS_ERR(field)) {
+ dev_err(dev, "MACRO_ID_TYPE reg field init failed\n");
+ return PTR_ERR(field);
+ }
+ sp->macro_id_type = field;
+
+ regmap = sp->regmap_phy_config_ctrl;
+ field = devm_regmap_field_alloc(dev, regmap, phy_pll_cfg_1);
+ if (IS_ERR(field)) {
+ dev_err(dev, "PHY_PLL_CFG_1 reg field init failed\n");
+ return PTR_ERR(field);
+ }
+ sp->phy_pll_cfg_1 = field;
+
+ return 0;
+}
+
+static int cdns_regmap_init_blocks(struct cdns_sierra_phy *sp,
+ void __iomem *base, u8 block_offset_shift,
+ u8 reg_offset_shift)
+{
+ struct device *dev = sp->dev;
+ struct regmap *regmap;
+ u32 block_offset;
+ int i;
+
+ for (i = 0; i < SIERRA_MAX_LANES; i++) {
+ block_offset = SIERRA_LANE_CDB_OFFSET(i, reg_offset_shift);
+ regmap = cdns_regmap_init(dev, base, block_offset,
+ block_offset_shift, reg_offset_shift,
+ &cdns_sierra_lane_cdb_config[i]);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "Failed to init lane CDB regmap\n");
+ return PTR_ERR(regmap);
+ }
+ sp->regmap_lane_cdb[i] = regmap;
+ }
+
+ regmap = cdns_regmap_init(dev, base, SIERRA_COMMON_CDB_OFFSET,
+ block_offset_shift, reg_offset_shift,
+ &cdns_sierra_common_cdb_config);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "Failed to init common CDB regmap\n");
+ return PTR_ERR(regmap);
+ }
+ sp->regmap_common_cdb = regmap;
+
+ regmap = cdns_regmap_init(dev, base, SIERRA_PHY_CONFIG_CTRL_OFFSET,
+ block_offset_shift, reg_offset_shift,
+ &cdns_sierra_phy_config_ctrl_config);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "Failed to init PHY config and control regmap\n");
+ return PTR_ERR(regmap);
+ }
+ sp->regmap_phy_config_ctrl = regmap;
+
+ return 0;
+}
+
static int cdns_sierra_phy_probe(struct platform_device *pdev)
{
struct cdns_sierra_phy *sp;
struct phy_provider *phy_provider;
struct device *dev = &pdev->dev;
const struct of_device_id *match;
+ struct cdns_sierra_data *data;
+ unsigned int id_value;
struct resource *res;
int i, ret, node = 0;
+ void __iomem *base;
struct device_node *dn = dev->of_node, *child;

if (of_get_child_count(dn) == 0)
return -ENODEV;

+ /* Get init data for this PHY */
+ match = of_match_device(cdns_sierra_id_table, dev);
+ if (!match)
+ return -EINVAL;
+
+ data = (struct cdns_sierra_data *)match->data;
+
sp = devm_kzalloc(dev, sizeof(*sp), GFP_KERNEL);
if (!sp)
return -ENOMEM;
dev_set_drvdata(dev, sp);
sp->dev = dev;
+ sp->init_data = data;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- sp->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(sp->base)) {
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base)) {
dev_err(dev, "missing \"reg\"\n");
- return PTR_ERR(sp->base);
+ return PTR_ERR(base);
}

- /* Get init data for this PHY */
- match = of_match_device(cdns_sierra_id_table, dev);
- if (!match)
- return -EINVAL;
- sp->init_data = (struct cdns_sierra_data *)match->data;
+ ret = cdns_regmap_init_blocks(sp, base, data->block_offset_shift,
+ data->reg_offset_shift);
+ if (ret)
+ return ret;
+
+ ret = cdns_regfield_init(sp);
+ if (ret)
+ return ret;

platform_set_drvdata(pdev, sp);

@@ -219,7 +397,8 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev)
reset_control_deassert(sp->apb_rst);

/* Check that PHY is present */
- if (sp->init_data->id_value != readl(sp->base)) {
+ regmap_field_read(sp->macro_id_type, &id_value);
+ if (sp->init_data->id_value != id_value) {
ret = -EINVAL;
goto clk_disable;
}
@@ -267,7 +446,7 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev)

/* If more than one subnode, configure the PHY as multilink */
if (!sp->autoconf && sp->nsubnodes > 1)
- writel(2, sp->base + SIERRA_PHY_PLL_CFG);
+ regmap_field_write(sp->phy_pll_cfg_1, 0x1);

pm_runtime_enable(dev);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
@@ -364,6 +543,8 @@ static struct cdns_reg_pairs cdns_pcie_regs[] = {

static const struct cdns_sierra_data cdns_map_sierra = {
SIERRA_MACRO_ID,
+ 0x2,
+ 0x2,
ARRAY_SIZE(cdns_pcie_regs),
ARRAY_SIZE(cdns_usb_regs),
cdns_pcie_regs,
--
2.17.1
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