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Subject[PATCH v2 04/14] phy: cadence-torrent: Add wrapper for PHY register access
Date
From: Swapnil Jakhade <sjakhade@cadence.com>

Add a wrapper function to write Torrent PHY registers to improve
code readability.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
---
drivers/phy/cadence/phy-cadence-torrent.c | 142 ++++++++++++++++--------------
1 file changed, 77 insertions(+), 65 deletions(-)

diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index eb61005..59c85d8 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -132,6 +132,14 @@ static const struct phy_ops cdns_torrent_phy_ops = {
.owner = THIS_MODULE,
};

+/* PHY mmr access functions */
+
+static void cdns_torrent_phy_write(struct cdns_torrent_phy *cdns_phy,
+ u32 offset, u32 val)
+{
+ writel(val, cdns_phy->sd_base + offset);
+}
+
static int cdns_torrent_dp_init(struct phy *phy)
{
unsigned char lane_bits;
@@ -234,34 +242,35 @@ static
void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
{
/* refclock registers - assumes 25 MHz refclock */
- writel(0x0019, cdns_phy->sd_base + CMN_SSM_BIAS_TMR);
- writel(0x0032, cdns_phy->sd_base + CMN_PLLSM0_PLLPRE_TMR);
- writel(0x00D1, cdns_phy->sd_base + CMN_PLLSM0_PLLLOCK_TMR);
- writel(0x0032, cdns_phy->sd_base + CMN_PLLSM1_PLLPRE_TMR);
- writel(0x00D1, cdns_phy->sd_base + CMN_PLLSM1_PLLLOCK_TMR);
- writel(0x007D, cdns_phy->sd_base + CMN_BGCAL_INIT_TMR);
- writel(0x007D, cdns_phy->sd_base + CMN_BGCAL_ITER_TMR);
- writel(0x0019, cdns_phy->sd_base + CMN_IBCAL_INIT_TMR);
- writel(0x001E, cdns_phy->sd_base + CMN_TXPUCAL_INIT_TMR);
- writel(0x0006, cdns_phy->sd_base + CMN_TXPUCAL_ITER_TMR);
- writel(0x001E, cdns_phy->sd_base + CMN_TXPDCAL_INIT_TMR);
- writel(0x0006, cdns_phy->sd_base + CMN_TXPDCAL_ITER_TMR);
- writel(0x02EE, cdns_phy->sd_base + CMN_RXCAL_INIT_TMR);
- writel(0x0006, cdns_phy->sd_base + CMN_RXCAL_ITER_TMR);
- writel(0x0002, cdns_phy->sd_base + CMN_SD_CAL_INIT_TMR);
- writel(0x0002, cdns_phy->sd_base + CMN_SD_CAL_ITER_TMR);
- writel(0x000E, cdns_phy->sd_base + CMN_SD_CAL_REFTIM_START);
- writel(0x012B, cdns_phy->sd_base + CMN_SD_CAL_PLLCNT_START);
+ cdns_torrent_phy_write(cdns_phy, CMN_SSM_BIAS_TMR, 0x0019);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM0_PLLPRE_TMR, 0x0032);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM0_PLLLOCK_TMR, 0x00D1);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM1_PLLPRE_TMR, 0x0032);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM1_PLLLOCK_TMR, 0x00D1);
+ cdns_torrent_phy_write(cdns_phy, CMN_BGCAL_INIT_TMR, 0x007D);
+ cdns_torrent_phy_write(cdns_phy, CMN_BGCAL_ITER_TMR, 0x007D);
+ cdns_torrent_phy_write(cdns_phy, CMN_IBCAL_INIT_TMR, 0x0019);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPUCAL_INIT_TMR, 0x001E);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPUCAL_ITER_TMR, 0x0006);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPDCAL_INIT_TMR, 0x001E);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPDCAL_ITER_TMR, 0x0006);
+ cdns_torrent_phy_write(cdns_phy, CMN_RXCAL_INIT_TMR, 0x02EE);
+ cdns_torrent_phy_write(cdns_phy, CMN_RXCAL_ITER_TMR, 0x0006);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_INIT_TMR, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_ITER_TMR, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_REFTIM_START, 0x000E);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_PLLCNT_START, 0x012B);
+
/* PLL registers */
- writel(0x0409, cdns_phy->sd_base + CMN_PDIAG_PLL0_CP_PADJ_M0);
- writel(0x1001, cdns_phy->sd_base + CMN_PDIAG_PLL0_CP_IADJ_M0);
- writel(0x0F08, cdns_phy->sd_base + CMN_PDIAG_PLL0_FILT_PADJ_M0);
- writel(0x0004, cdns_phy->sd_base + CMN_PLL0_DSM_DIAG_M0);
- writel(0x00FA, cdns_phy->sd_base + CMN_PLL0_VCOCAL_INIT_TMR);
- writel(0x0004, cdns_phy->sd_base + CMN_PLL0_VCOCAL_ITER_TMR);
- writel(0x00FA, cdns_phy->sd_base + CMN_PLL1_VCOCAL_INIT_TMR);
- writel(0x0004, cdns_phy->sd_base + CMN_PLL1_VCOCAL_ITER_TMR);
- writel(0x0318, cdns_phy->sd_base + CMN_PLL0_VCOCAL_REFTIM_START);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0409);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x1001);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_DSM_DIAG_M0, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_INIT_TMR, 0x00FA);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_INIT_TMR, 0x00FA);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_REFTIM_START, 0x0318);
}

static
@@ -269,41 +278,41 @@ void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
{
/* Assumes 25 MHz refclock */
switch (cdns_phy->max_bit_rate) {
- /* Setting VCO for 10.8GHz */
+ /* Setting VCO for 10.8GHz */
case 2700:
case 5400:
- writel(0x01B0, cdns_phy->sd_base + CMN_PLL0_INTDIV_M0);
- writel(0x0000, cdns_phy->sd_base + CMN_PLL0_FRACDIVL_M0);
- writel(0x0002, cdns_phy->sd_base + CMN_PLL0_FRACDIVH_M0);
- writel(0x0120, cdns_phy->sd_base + CMN_PLL0_HIGH_THR_M0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_INTDIV_M0, 0x01B0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x0120);
break;
- /* Setting VCO for 9.72GHz */
+ /* Setting VCO for 9.72GHz */
case 2430:
case 3240:
- writel(0x0184, cdns_phy->sd_base + CMN_PLL0_INTDIV_M0);
- writel(0xCCCD, cdns_phy->sd_base + CMN_PLL0_FRACDIVL_M0);
- writel(0x0002, cdns_phy->sd_base + CMN_PLL0_FRACDIVH_M0);
- writel(0x0104, cdns_phy->sd_base + CMN_PLL0_HIGH_THR_M0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_INTDIV_M0, 0x0184);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0xCCCD);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x0104);
break;
- /* Setting VCO for 8.64GHz */
+ /* Setting VCO for 8.64GHz */
case 2160:
case 4320:
- writel(0x0159, cdns_phy->sd_base + CMN_PLL0_INTDIV_M0);
- writel(0x999A, cdns_phy->sd_base + CMN_PLL0_FRACDIVL_M0);
- writel(0x0002, cdns_phy->sd_base + CMN_PLL0_FRACDIVH_M0);
- writel(0x00E7, cdns_phy->sd_base + CMN_PLL0_HIGH_THR_M0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_INTDIV_M0, 0x0159);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0x999A);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x00E7);
break;
- /* Setting VCO for 8.1GHz */
+ /* Setting VCO for 8.1GHz */
case 8100:
- writel(0x0144, cdns_phy->sd_base + CMN_PLL0_INTDIV_M0);
- writel(0x0000, cdns_phy->sd_base + CMN_PLL0_FRACDIVL_M0);
- writel(0x0002, cdns_phy->sd_base + CMN_PLL0_FRACDIVH_M0);
- writel(0x00D8, cdns_phy->sd_base + CMN_PLL0_HIGH_THR_M0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_INTDIV_M0, 0x0144);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x00D8);
break;
}

- writel(0x0002, cdns_phy->sd_base + CMN_PDIAG_PLL0_CTRL_M0);
- writel(0x0318, cdns_phy->sd_base + CMN_PLL0_VCOCAL_PLLCNT_START);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_PLLCNT_START, 0x0318);
}

static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)
@@ -313,7 +322,7 @@ static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)
unsigned int i;

/* 16'h0000 for single DP link configuration */
- writel(0x0000, cdns_phy->sd_base + PHY_PLL_CFG);
+ cdns_torrent_phy_write(cdns_phy, PHY_PLL_CFG, 0x0000);

switch (cdns_phy->max_bit_rate) {
case 1620:
@@ -324,7 +333,7 @@ static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)
case 2430:
case 2700:
clk_sel_val = 0x0701;
- hsclk_div_val = 1;
+ hsclk_div_val = 1;
break;
case 3240:
clk_sel_val = 0x0b00;
@@ -341,13 +350,14 @@ static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)
break;
}

- writel(clk_sel_val, cdns_phy->sd_base + CMN_PDIAG_PLL0_CLK_SEL_M0);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL0_CLK_SEL_M0, clk_sel_val);

/* PMA lane configuration to deal with multi-link operation */
- for (i = 0; i < cdns_phy->num_lanes; i++) {
- writel(hsclk_div_val,
- cdns_phy->sd_base + (XCVR_DIAG_HSCLK_DIV | (i << 11)));
- }
+ for (i = 0; i < cdns_phy->num_lanes; i++)
+ cdns_torrent_phy_write(cdns_phy,
+ (XCVR_DIAG_HSCLK_DIV | (i << 11)),
+ hsclk_div_val);
}

static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
@@ -356,15 +366,17 @@ static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
unsigned int lane_bits = (lane & LANE_MASK) << 11;

/* Writing Tx/Rx Power State Controllers registers */
- writel(0x00FB, cdns_phy->sd_base + (TX_PSC_A0 | lane_bits));
- writel(0x04AA, cdns_phy->sd_base + (TX_PSC_A2 | lane_bits));
- writel(0x04AA, cdns_phy->sd_base + (TX_PSC_A3 | lane_bits));
- writel(0x0000, cdns_phy->sd_base + (RX_PSC_A0 | lane_bits));
- writel(0x0000, cdns_phy->sd_base + (RX_PSC_A2 | lane_bits));
- writel(0x0000, cdns_phy->sd_base + (RX_PSC_A3 | lane_bits));
-
- writel(0x0001, cdns_phy->sd_base + (XCVR_DIAG_PLLDRC_CTRL | lane_bits));
- writel(0x0000, cdns_phy->sd_base + (XCVR_DIAG_HSCLK_SEL | lane_bits));
+ cdns_torrent_phy_write(cdns_phy, (TX_PSC_A0 | lane_bits), 0x00FB);
+ cdns_torrent_phy_write(cdns_phy, (TX_PSC_A2 | lane_bits), 0x04AA);
+ cdns_torrent_phy_write(cdns_phy, (TX_PSC_A3 | lane_bits), 0x04AA);
+ cdns_torrent_phy_write(cdns_phy, (RX_PSC_A0 | lane_bits), 0x0000);
+ cdns_torrent_phy_write(cdns_phy, (RX_PSC_A2 | lane_bits), 0x0000);
+ cdns_torrent_phy_write(cdns_phy, (RX_PSC_A3 | lane_bits), 0x0000);
+
+ cdns_torrent_phy_write(cdns_phy,
+ (XCVR_DIAG_PLLDRC_CTRL | lane_bits), 0x0001);
+ cdns_torrent_phy_write(cdns_phy,
+ (XCVR_DIAG_HSCLK_SEL | lane_bits), 0x0000);
}

static void cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy)
--
2.7.4
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