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Commit b54b47bd authored by Swapnil Jakhade's avatar Swapnil Jakhade Committed by Vinod Koul
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phy: cadence-torrent: Add single link PCIe support 

Add single link PCIe register sequences in Torrent PHY driver.
Also, add support for getting SSC type from DT.
Signed-off-by: default avatarSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-2-git-send-email-sjakhade@cadence.comSigned-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 074e9915
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Showing with 266 additions and 30 deletions
drivers/phy/cadence/phy-cadence-torrent.c
View file @ b54b47bd
......@@ -28,6 +28,9 @@
#define MAX_NUM_LANES 4
#define DEFAULT_MAX_BIT_RATE 8100 /* in Mbps */
#define NUM_SSC_MODE 3
#define NUM_PHY_TYPE 2
#define POLL_TIMEOUT_US 5000
#define TORRENT_COMMON_CDB_OFFSET 0x0
......@@ -98,6 +101,14 @@
#define CMN_PLL0_LOCK_REFCNT_START 0x009CU
#define CMN_PLL0_LOCK_PLLCNT_START 0x009EU
#define CMN_PLL0_LOCK_PLLCNT_THR 0x009FU
#define CMN_PLL0_INTDIV_M1 0x00A0U
#define CMN_PLL0_FRACDIVH_M1 0x00A2U
#define CMN_PLL0_HIGH_THR_M1 0x00A3U
#define CMN_PLL0_DSM_DIAG_M1 0x00A4U
#define CMN_PLL0_SS_CTRL1_M1 0x00A8U
#define CMN_PLL0_SS_CTRL2_M1 0x00A9U
#define CMN_PLL0_SS_CTRL3_M1 0x00AAU
#define CMN_PLL0_SS_CTRL4_M1 0x00ABU
#define CMN_PLL1_VCOCAL_TCTRL 0x00C2U
#define CMN_PLL1_VCOCAL_INIT_TMR 0x00C4U
#define CMN_PLL1_VCOCAL_ITER_TMR 0x00C5U
......@@ -130,8 +141,10 @@
#define CMN_PDIAG_PLL0_CP_PADJ_M0 0x01A4U
#define CMN_PDIAG_PLL0_CP_IADJ_M0 0x01A5U
#define CMN_PDIAG_PLL0_FILT_PADJ_M0 0x01A6U
#define CMN_PDIAG_PLL0_CTRL_M1 0x01B0U
#define CMN_PDIAG_PLL0_CP_PADJ_M1 0x01B4U
#define CMN_PDIAG_PLL0_CP_IADJ_M1 0x01B5U
#define CMN_PDIAG_PLL0_FILT_PADJ_M1 0x01B6U
#define CMN_PDIAG_PLL1_CTRL_M0 0x01C0U
#define CMN_PDIAG_PLL1_CLK_SEL_M0 0x01C1U
#define CMN_PDIAG_PLL1_CP_PADJ_M0 0x01C4U
......@@ -162,6 +175,9 @@
#define RX_REE_GCSM1_CTRL 0x0108U
#define RX_REE_GCSM2_CTRL 0x0110U
#define RX_REE_PERGCSM_CTRL 0x0118U
#define RX_REE_TAP1_CLIP 0x0171U
#define RX_REE_TAP2TON_CLIP 0x0172U
#define RX_DIAG_ACYA 0x01FFU
/* PHY PCS common registers */
#define PHY_PLL_CFG 0x000EU
......@@ -182,12 +198,24 @@ static const struct reg_field phy_pma_pll_raw_ctrl =
static const struct reg_field phy_reset_ctrl =
REG_FIELD(PHY_RESET, 8, 8);
enum cdns_torrent_phy_type {
TYPE_DP,
TYPE_PCIE
};
enum cdns_torrent_ssc_mode {
NO_SSC,
EXTERNAL_SSC,
INTERNAL_SSC
};
struct cdns_torrent_inst {
struct phy *phy;
u32 mlane;
u32 phy_type;
enum cdns_torrent_phy_type phy_type;
u32 num_lanes;
struct reset_control *lnk_rst;
enum cdns_torrent_ssc_mode ssc_mode;
};
struct cdns_torrent_phy {
......@@ -221,8 +249,9 @@ enum phy_powerstate {
POWERSTATE_A3 = 3,
};
static int cdns_torrent_phy_init(struct phy *phy);
static int cdns_torrent_phy_exit(struct phy *phy);
static int cdns_torrent_dp_init(struct phy *phy);
static int cdns_torrent_dp_exit(struct phy *phy);
static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy,
u32 num_lanes);
static
......@@ -252,17 +281,30 @@ static int cdns_torrent_phy_on(struct phy *phy);
static int cdns_torrent_phy_off(struct phy *phy);
static const struct phy_ops cdns_torrent_phy_ops = {
.init = cdns_torrent_dp_init,
.exit = cdns_torrent_dp_exit,
.init = cdns_torrent_phy_init,
.exit = cdns_torrent_phy_exit,
.configure = cdns_torrent_dp_configure,
.power_on = cdns_torrent_phy_on,
.power_off = cdns_torrent_phy_off,
.owner = THIS_MODULE,
};
struct cdns_reg_pairs {
u32 val;
u32 off;
};
struct cdns_torrent_vals {
struct cdns_reg_pairs *reg_pairs;
u32 num_regs;
};
struct cdns_torrent_data {
u8 block_offset_shift;
u8 reg_offset_shift;
struct cdns_torrent_vals *cmn_vals[NUM_PHY_TYPE][NUM_SSC_MODE];
struct cdns_torrent_vals *tx_ln_vals[NUM_PHY_TYPE][NUM_SSC_MODE];
struct cdns_torrent_vals *rx_ln_vals[NUM_PHY_TYPE][NUM_SSC_MODE];
};
struct cdns_regmap_cdb_context {
......@@ -846,19 +888,6 @@ static int cdns_torrent_dp_init(struct phy *phy)
struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;
ret = clk_prepare_enable(cdns_phy->clk);
if (ret) {
dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
return ret;
}
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;
}
switch (cdns_phy->ref_clk_rate) {
case REF_CLK_19_2MHz:
case REF_CLK_25MHz:
......@@ -918,7 +947,7 @@ static int cdns_torrent_dp_init(struct phy *phy)
return ret;
}
static int cdns_torrent_dp_exit(struct phy *phy)
static int cdns_torrent_phy_exit(struct phy *phy)
{
struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
......@@ -1725,6 +1754,74 @@ static int cdns_torrent_regmap_init(struct cdns_torrent_phy *cdns_phy)
return 0;
}
static int cdns_torrent_phy_init(struct phy *phy)
{
struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
struct cdns_torrent_vals *cmn_vals, *tx_ln_vals, *rx_ln_vals;
struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
enum cdns_torrent_phy_type phy_type = inst->phy_type;
enum cdns_torrent_ssc_mode ssc = inst->ssc_mode;
struct cdns_reg_pairs *reg_pairs;
struct regmap *regmap;
u32 num_regs;
int ret, i, j;
ret = clk_prepare_enable(cdns_phy->clk);
if (ret) {
dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
return ret;
}
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;
}
if (phy_type == TYPE_DP)
return cdns_torrent_dp_init(phy);
/* PMA common registers configurations */
cmn_vals = cdns_phy->init_data->cmn_vals[phy_type][ssc];
if (cmn_vals) {
reg_pairs = cmn_vals->reg_pairs;
num_regs = cmn_vals->num_regs;
regmap = cdns_phy->regmap_common_cdb;
for (i = 0; i < num_regs; i++)
regmap_write(regmap, reg_pairs[i].off,
reg_pairs[i].val);
}
/* PMA TX lane registers configurations */
tx_ln_vals = cdns_phy->init_data->tx_ln_vals[phy_type][ssc];
if (tx_ln_vals) {
reg_pairs = tx_ln_vals->reg_pairs;
num_regs = tx_ln_vals->num_regs;
for (i = 0; i < inst->num_lanes; i++) {
regmap = cdns_phy->regmap_tx_lane_cdb[i + inst->mlane];
for (j = 0; j < num_regs; j++)
regmap_write(regmap, reg_pairs[j].off,
reg_pairs[j].val);
}
}
/* PMA RX lane registers configurations */
rx_ln_vals = cdns_phy->init_data->rx_ln_vals[phy_type][ssc];
if (rx_ln_vals) {
reg_pairs = rx_ln_vals->reg_pairs;
num_regs = rx_ln_vals->num_regs;
for (i = 0; i < inst->num_lanes; i++) {
regmap = cdns_phy->regmap_rx_lane_cdb[i + inst->mlane];
for (j = 0; j < num_regs; j++)
regmap_write(regmap, reg_pairs[j].off,
reg_pairs[j].val);
}
}
return 0;
}
static int cdns_torrent_phy_probe(struct platform_device *pdev)
{
struct cdns_torrent_phy *cdns_phy;
......@@ -1735,6 +1832,7 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
int ret, subnodes, node = 0, i;
u32 total_num_lanes = 0;
u8 init_dp_regmap = 0;
u32 phy_type;
/* Get init data for this PHY */
data = of_device_get_match_data(dev);
......@@ -1800,14 +1898,26 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
goto put_child;
}
if (of_property_read_u32(child, "cdns,phy-type",
&cdns_phy->phys[node].phy_type)) {
if (of_property_read_u32(child, "cdns,phy-type", &phy_type)) {
dev_err(dev, "%s: No \"cdns,phy-type\"-property.\n",
child->full_name);
ret = -EINVAL;
goto put_child;
}
switch (phy_type) {
case PHY_TYPE_PCIE:
cdns_phy->phys[node].phy_type = TYPE_PCIE;
break;
case PHY_TYPE_DP:
cdns_phy->phys[node].phy_type = TYPE_DP;
break;
default:
dev_err(dev, "Unsupported protocol\n");
ret = -EINVAL;
goto put_child;
}
if (of_property_read_u32(child, "cdns,num-lanes",
&cdns_phy->phys[node].num_lanes)) {
dev_err(dev, "%s: No \"cdns,num-lanes\"-property.\n",
......@@ -1818,7 +1928,18 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
total_num_lanes += cdns_phy->phys[node].num_lanes;
if (cdns_phy->phys[node].phy_type == PHY_TYPE_DP) {
/* Get SSC mode */
cdns_phy->phys[node].ssc_mode = NO_SSC;
of_property_read_u32(child, "cdns,ssc-mode",
&cdns_phy->phys[node].ssc_mode);
gphy = devm_phy_create(dev, child, &cdns_torrent_phy_ops);
if (IS_ERR(gphy)) {
ret = PTR_ERR(gphy);
goto put_child;
}
if (cdns_phy->phys[node].phy_type == TYPE_DP) {
switch (cdns_phy->phys[node].num_lanes) {
case 1:
case 2:
......@@ -1861,13 +1982,6 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
goto put_child;
}
gphy = devm_phy_create(dev, child,
&cdns_torrent_phy_ops);
if (IS_ERR(gphy)) {
ret = PTR_ERR(gphy);
goto put_child;
}
if (!init_dp_regmap) {
ret = cdns_torrent_dp_regmap_init(cdns_phy);
if (ret)
......@@ -1889,6 +2003,7 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
gphy->attrs.max_link_rate = cdns_phy->max_bit_rate;
gphy->attrs.mode = PHY_MODE_DP;
}
cdns_phy->phys[node].phy = gphy;
phy_set_drvdata(gphy, &cdns_phy->phys[node]);
......@@ -1932,14 +2047,135 @@ static int cdns_torrent_phy_remove(struct platform_device *pdev)
return 0;
}
/* Single link PCIe, 100 MHz Ref clk, internal SSC */
static struct cdns_reg_pairs sl_pcie_100_int_ssc_cmn_regs[] = {
{0x0004, CMN_PLL0_DSM_DIAG_M0},
{0x0004, CMN_PLL0_DSM_DIAG_M1},
{0x0004, CMN_PLL1_DSM_DIAG_M0},
{0x0509, CMN_PDIAG_PLL0_CP_PADJ_M0},
{0x0509, CMN_PDIAG_PLL0_CP_PADJ_M1},
{0x0509, CMN_PDIAG_PLL1_CP_PADJ_M0},
{0x0F00, CMN_PDIAG_PLL0_CP_IADJ_M0},
{0x0F00, CMN_PDIAG_PLL0_CP_IADJ_M1},
{0x0F00, CMN_PDIAG_PLL1_CP_IADJ_M0},
{0x0F08, CMN_PDIAG_PLL0_FILT_PADJ_M0},
{0x0F08, CMN_PDIAG_PLL0_FILT_PADJ_M1},
{0x0F08, CMN_PDIAG_PLL1_FILT_PADJ_M0},
{0x0064, CMN_PLL0_INTDIV_M0},
{0x0050, CMN_PLL0_INTDIV_M1},
{0x0050, CMN_PLL1_INTDIV_M0},
{0x0002, CMN_PLL0_FRACDIVH_M0},
{0x0002, CMN_PLL0_FRACDIVH_M1},
{0x0002, CMN_PLL1_FRACDIVH_M0},
{0x0044, CMN_PLL0_HIGH_THR_M0},
{0x0036, CMN_PLL0_HIGH_THR_M1},
{0x0036, CMN_PLL1_HIGH_THR_M0},
{0x0002, CMN_PDIAG_PLL0_CTRL_M0},
{0x0002, CMN_PDIAG_PLL0_CTRL_M1},
{0x0002, CMN_PDIAG_PLL1_CTRL_M0},
{0x0001, CMN_PLL0_SS_CTRL1_M0},
{0x0001, CMN_PLL0_SS_CTRL1_M1},
{0x0001, CMN_PLL1_SS_CTRL1_M0},
{0x011B, CMN_PLL0_SS_CTRL2_M0},
{0x011B, CMN_PLL0_SS_CTRL2_M1},
{0x011B, CMN_PLL1_SS_CTRL2_M0},
{0x006E, CMN_PLL0_SS_CTRL3_M0},
{0x0058, CMN_PLL0_SS_CTRL3_M1},
{0x0058, CMN_PLL1_SS_CTRL3_M0},
{0x000E, CMN_PLL0_SS_CTRL4_M0},
{0x0012, CMN_PLL0_SS_CTRL4_M1},
{0x0012, CMN_PLL1_SS_CTRL4_M0},
{0x0C5E, CMN_PLL0_VCOCAL_REFTIM_START},
{0x0C5E, CMN_PLL1_VCOCAL_REFTIM_START},
{0x0C56, CMN_PLL0_VCOCAL_PLLCNT_START},
{0x0C56, CMN_PLL1_VCOCAL_PLLCNT_START},
{0x0003, CMN_PLL0_VCOCAL_TCTRL},
{0x0003, CMN_PLL1_VCOCAL_TCTRL},
{0x00C7, CMN_PLL0_LOCK_REFCNT_START},
{0x00C7, CMN_PLL1_LOCK_REFCNT_START},
{0x00C7, CMN_PLL0_LOCK_PLLCNT_START},
{0x00C7, CMN_PLL1_LOCK_PLLCNT_START},
{0x0005, CMN_PLL0_LOCK_PLLCNT_THR},
{0x0005, CMN_PLL1_LOCK_PLLCNT_THR}
};
static struct cdns_torrent_vals sl_pcie_100_int_ssc_cmn_vals = {
.reg_pairs = sl_pcie_100_int_ssc_cmn_regs,
.num_regs = ARRAY_SIZE(sl_pcie_100_int_ssc_cmn_regs),
};
/* PCIe, 100 MHz Ref clk, no SSC & external SSC */
static struct cdns_reg_pairs pcie_100_ext_no_ssc_cmn_regs[] = {
{0x0003, CMN_PLL0_VCOCAL_TCTRL},
{0x0003, CMN_PLL1_VCOCAL_TCTRL}
};
static struct cdns_reg_pairs pcie_100_ext_no_ssc_rx_ln_regs[] = {
{0x0019, RX_REE_TAP1_CLIP},
{0x0019, RX_REE_TAP2TON_CLIP},
{0x0001, RX_DIAG_ACYA}
};
static struct cdns_torrent_vals pcie_100_no_ssc_cmn_vals = {
.reg_pairs = pcie_100_ext_no_ssc_cmn_regs,
.num_regs = ARRAY_SIZE(pcie_100_ext_no_ssc_cmn_regs),
};
static struct cdns_torrent_vals pcie_100_no_ssc_rx_ln_vals = {
.reg_pairs = pcie_100_ext_no_ssc_rx_ln_regs,
.num_regs = ARRAY_SIZE(pcie_100_ext_no_ssc_rx_ln_regs),
};
static const struct cdns_torrent_data cdns_map_torrent = {
.block_offset_shift = 0x2,
.reg_offset_shift = 0x2,
.cmn_vals = {
[TYPE_PCIE] = {
[NO_SSC] = &pcie_100_no_ssc_cmn_vals,
[EXTERNAL_SSC] = &pcie_100_no_ssc_cmn_vals,
[INTERNAL_SSC] = &sl_pcie_100_int_ssc_cmn_vals,
},
},
.tx_ln_vals = {
[TYPE_PCIE] = {
[NO_SSC] = NULL,
[EXTERNAL_SSC] = NULL,
[INTERNAL_SSC] = NULL,
},
},
.rx_ln_vals = {
[TYPE_PCIE] = {
[NO_SSC] = &pcie_100_no_ssc_rx_ln_vals,
[EXTERNAL_SSC] = &pcie_100_no_ssc_rx_ln_vals,
[INTERNAL_SSC] = &pcie_100_no_ssc_rx_ln_vals,
},
},
};
static const struct cdns_torrent_data ti_j721e_map_torrent = {
.block_offset_shift = 0x0,
.reg_offset_shift = 0x1,
.cmn_vals = {
[TYPE_PCIE] = {
[NO_SSC] = &pcie_100_no_ssc_cmn_vals,
[EXTERNAL_SSC] = &pcie_100_no_ssc_cmn_vals,
[INTERNAL_SSC] = &sl_pcie_100_int_ssc_cmn_vals,
},
},
.tx_ln_vals = {
[TYPE_PCIE] = {
[NO_SSC] = NULL,
[EXTERNAL_SSC] = NULL,
[INTERNAL_SSC] = NULL,
},
},
.rx_ln_vals = {
[TYPE_PCIE] = {
[NO_SSC] = &pcie_100_no_ssc_rx_ln_vals,
[EXTERNAL_SSC] = &pcie_100_no_ssc_rx_ln_vals,
[INTERNAL_SSC] = &pcie_100_no_ssc_rx_ln_vals,
},
},
};
static const struct of_device_id cdns_torrent_phy_of_match[] = {
......
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