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path: root/drivers/phy/broadcom/phy-brcm-sata.c
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-rw-r--r--drivers/phy/broadcom/phy-brcm-sata.c860
1 files changed, 860 insertions, 0 deletions
diff --git a/drivers/phy/broadcom/phy-brcm-sata.c b/drivers/phy/broadcom/phy-brcm-sata.c
new file mode 100644
index 000000000..ed9e18791
--- /dev/null
+++ b/drivers/phy/broadcom/phy-brcm-sata.c
@@ -0,0 +1,860 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Broadcom SATA3 AHCI Controller PHY Driver
+ *
+ * Copyright (C) 2016 Broadcom
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#define SATA_PCB_BANK_OFFSET 0x23c
+#define SATA_PCB_REG_OFFSET(ofs) ((ofs) * 4)
+
+#define MAX_PORTS 2
+
+/* Register offset between PHYs in PCB space */
+#define SATA_PCB_REG_28NM_SPACE_SIZE 0x1000
+
+/* The older SATA PHY registers duplicated per port registers within the map,
+ * rather than having a separate map per port.
+ */
+#define SATA_PCB_REG_40NM_SPACE_SIZE 0x10
+
+/* Register offset between PHYs in PHY control space */
+#define SATA_PHY_CTRL_REG_28NM_SPACE_SIZE 0x8
+
+enum brcm_sata_phy_version {
+ BRCM_SATA_PHY_STB_16NM,
+ BRCM_SATA_PHY_STB_28NM,
+ BRCM_SATA_PHY_STB_40NM,
+ BRCM_SATA_PHY_IPROC_NS2,
+ BRCM_SATA_PHY_IPROC_NSP,
+ BRCM_SATA_PHY_IPROC_SR,
+ BRCM_SATA_PHY_DSL_28NM,
+};
+
+enum brcm_sata_phy_rxaeq_mode {
+ RXAEQ_MODE_OFF = 0,
+ RXAEQ_MODE_AUTO,
+ RXAEQ_MODE_MANUAL,
+};
+
+static enum brcm_sata_phy_rxaeq_mode rxaeq_to_val(const char *m)
+{
+ if (!strcmp(m, "auto"))
+ return RXAEQ_MODE_AUTO;
+ else if (!strcmp(m, "manual"))
+ return RXAEQ_MODE_MANUAL;
+ else
+ return RXAEQ_MODE_OFF;
+}
+
+struct brcm_sata_port {
+ int portnum;
+ struct phy *phy;
+ struct brcm_sata_phy *phy_priv;
+ bool ssc_en;
+ enum brcm_sata_phy_rxaeq_mode rxaeq_mode;
+ u32 rxaeq_val;
+ u32 tx_amplitude_val;
+};
+
+struct brcm_sata_phy {
+ struct device *dev;
+ void __iomem *phy_base;
+ void __iomem *ctrl_base;
+ enum brcm_sata_phy_version version;
+
+ struct brcm_sata_port phys[MAX_PORTS];
+};
+
+enum sata_phy_regs {
+ BLOCK0_REG_BANK = 0x000,
+ BLOCK0_XGXSSTATUS = 0x81,
+ BLOCK0_XGXSSTATUS_PLL_LOCK = BIT(12),
+ BLOCK0_SPARE = 0x8d,
+ BLOCK0_SPARE_OOB_CLK_SEL_MASK = 0x3,
+ BLOCK0_SPARE_OOB_CLK_SEL_REFBY2 = 0x1,
+
+ BLOCK1_REG_BANK = 0x10,
+ BLOCK1_TEST_TX = 0x83,
+ BLOCK1_TEST_TX_AMP_SHIFT = 12,
+
+ PLL_REG_BANK_0 = 0x050,
+ PLL_REG_BANK_0_PLLCONTROL_0 = 0x81,
+ PLLCONTROL_0_FREQ_DET_RESTART = BIT(13),
+ PLLCONTROL_0_FREQ_MONITOR = BIT(12),
+ PLLCONTROL_0_SEQ_START = BIT(15),
+ PLL_CAP_CHARGE_TIME = 0x83,
+ PLL_VCO_CAL_THRESH = 0x84,
+ PLL_CAP_CONTROL = 0x85,
+ PLL_FREQ_DET_TIME = 0x86,
+ PLL_ACTRL2 = 0x8b,
+ PLL_ACTRL2_SELDIV_MASK = 0x1f,
+ PLL_ACTRL2_SELDIV_SHIFT = 9,
+ PLL_ACTRL6 = 0x86,
+
+ PLL1_REG_BANK = 0x060,
+ PLL1_ACTRL2 = 0x82,
+ PLL1_ACTRL3 = 0x83,
+ PLL1_ACTRL4 = 0x84,
+ PLL1_ACTRL5 = 0x85,
+ PLL1_ACTRL6 = 0x86,
+ PLL1_ACTRL7 = 0x87,
+ PLL1_ACTRL8 = 0x88,
+
+ TX_REG_BANK = 0x070,
+ TX_ACTRL0 = 0x80,
+ TX_ACTRL0_TXPOL_FLIP = BIT(6),
+ TX_ACTRL5 = 0x85,
+ TX_ACTRL5_SSC_EN = BIT(11),
+
+ AEQRX_REG_BANK_0 = 0xd0,
+ AEQ_CONTROL1 = 0x81,
+ AEQ_CONTROL1_ENABLE = BIT(2),
+ AEQ_CONTROL1_FREEZE = BIT(3),
+ AEQ_FRC_EQ = 0x83,
+ AEQ_FRC_EQ_FORCE = BIT(0),
+ AEQ_FRC_EQ_FORCE_VAL = BIT(1),
+ AEQ_RFZ_FRC_VAL = BIT(8),
+ AEQRX_REG_BANK_1 = 0xe0,
+ AEQRX_SLCAL0_CTRL0 = 0x82,
+ AEQRX_SLCAL1_CTRL0 = 0x86,
+
+ OOB_REG_BANK = 0x150,
+ OOB1_REG_BANK = 0x160,
+ OOB_CTRL1 = 0x80,
+ OOB_CTRL1_BURST_MAX_MASK = 0xf,
+ OOB_CTRL1_BURST_MAX_SHIFT = 12,
+ OOB_CTRL1_BURST_MIN_MASK = 0xf,
+ OOB_CTRL1_BURST_MIN_SHIFT = 8,
+ OOB_CTRL1_WAKE_IDLE_MAX_MASK = 0xf,
+ OOB_CTRL1_WAKE_IDLE_MAX_SHIFT = 4,
+ OOB_CTRL1_WAKE_IDLE_MIN_MASK = 0xf,
+ OOB_CTRL1_WAKE_IDLE_MIN_SHIFT = 0,
+ OOB_CTRL2 = 0x81,
+ OOB_CTRL2_SEL_ENA_SHIFT = 15,
+ OOB_CTRL2_SEL_ENA_RC_SHIFT = 14,
+ OOB_CTRL2_RESET_IDLE_MAX_MASK = 0x3f,
+ OOB_CTRL2_RESET_IDLE_MAX_SHIFT = 8,
+ OOB_CTRL2_BURST_CNT_MASK = 0x3,
+ OOB_CTRL2_BURST_CNT_SHIFT = 6,
+ OOB_CTRL2_RESET_IDLE_MIN_MASK = 0x3f,
+ OOB_CTRL2_RESET_IDLE_MIN_SHIFT = 0,
+
+ TXPMD_REG_BANK = 0x1a0,
+ TXPMD_CONTROL1 = 0x81,
+ TXPMD_CONTROL1_TX_SSC_EN_FRC = BIT(0),
+ TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL = BIT(1),
+ TXPMD_TX_FREQ_CTRL_CONTROL1 = 0x82,
+ TXPMD_TX_FREQ_CTRL_CONTROL2 = 0x83,
+ TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK = 0x3ff,
+ TXPMD_TX_FREQ_CTRL_CONTROL3 = 0x84,
+ TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK = 0x3ff,
+
+ RXPMD_REG_BANK = 0x1c0,
+ RXPMD_RX_CDR_CONTROL1 = 0x81,
+ RXPMD_RX_PPM_VAL_MASK = 0x1ff,
+ RXPMD_RXPMD_EN_FRC = BIT(12),
+ RXPMD_RXPMD_EN_FRC_VAL = BIT(13),
+ RXPMD_RX_CDR_CDR_PROP_BW = 0x82,
+ RXPMD_G_CDR_PROP_BW_MASK = 0x7,
+ RXPMD_G1_CDR_PROP_BW_SHIFT = 0,
+ RXPMD_G2_CDR_PROP_BW_SHIFT = 3,
+ RXPMD_G3_CDR_PROB_BW_SHIFT = 6,
+ RXPMD_RX_CDR_CDR_ACQ_INTEG_BW = 0x83,
+ RXPMD_G_CDR_ACQ_INT_BW_MASK = 0x7,
+ RXPMD_G1_CDR_ACQ_INT_BW_SHIFT = 0,
+ RXPMD_G2_CDR_ACQ_INT_BW_SHIFT = 3,
+ RXPMD_G3_CDR_ACQ_INT_BW_SHIFT = 6,
+ RXPMD_RX_CDR_CDR_LOCK_INTEG_BW = 0x84,
+ RXPMD_G_CDR_LOCK_INT_BW_MASK = 0x7,
+ RXPMD_G1_CDR_LOCK_INT_BW_SHIFT = 0,
+ RXPMD_G2_CDR_LOCK_INT_BW_SHIFT = 3,
+ RXPMD_G3_CDR_LOCK_INT_BW_SHIFT = 6,
+ RXPMD_RX_FREQ_MON_CONTROL1 = 0x87,
+ RXPMD_MON_CORRECT_EN = BIT(8),
+ RXPMD_MON_MARGIN_VAL_MASK = 0xff,
+};
+
+enum sata_phy_ctrl_regs {
+ PHY_CTRL_1 = 0x0,
+ PHY_CTRL_1_RESET = BIT(0),
+};
+
+static inline void __iomem *brcm_sata_ctrl_base(struct brcm_sata_port *port)
+{
+ struct brcm_sata_phy *priv = port->phy_priv;
+ u32 size = 0;
+
+ switch (priv->version) {
+ case BRCM_SATA_PHY_IPROC_NS2:
+ size = SATA_PHY_CTRL_REG_28NM_SPACE_SIZE;
+ break;
+ default:
+ dev_err(priv->dev, "invalid phy version\n");
+ break;
+ }
+
+ return priv->ctrl_base + (port->portnum * size);
+}
+
+static void brcm_sata_phy_wr(struct brcm_sata_port *port, u32 bank,
+ u32 ofs, u32 msk, u32 value)
+{
+ struct brcm_sata_phy *priv = port->phy_priv;
+ void __iomem *pcb_base = priv->phy_base;
+ u32 tmp;
+
+ if (priv->version == BRCM_SATA_PHY_STB_40NM)
+ bank += (port->portnum * SATA_PCB_REG_40NM_SPACE_SIZE);
+ else
+ pcb_base += (port->portnum * SATA_PCB_REG_28NM_SPACE_SIZE);
+
+ writel(bank, pcb_base + SATA_PCB_BANK_OFFSET);
+ tmp = readl(pcb_base + SATA_PCB_REG_OFFSET(ofs));
+ tmp = (tmp & msk) | value;
+ writel(tmp, pcb_base + SATA_PCB_REG_OFFSET(ofs));
+}
+
+static u32 brcm_sata_phy_rd(struct brcm_sata_port *port, u32 bank, u32 ofs)
+{
+ struct brcm_sata_phy *priv = port->phy_priv;
+ void __iomem *pcb_base = priv->phy_base;
+
+ if (priv->version == BRCM_SATA_PHY_STB_40NM)
+ bank += (port->portnum * SATA_PCB_REG_40NM_SPACE_SIZE);
+ else
+ pcb_base += (port->portnum * SATA_PCB_REG_28NM_SPACE_SIZE);
+
+ writel(bank, pcb_base + SATA_PCB_BANK_OFFSET);
+ return readl(pcb_base + SATA_PCB_REG_OFFSET(ofs));
+}
+
+/* These defaults were characterized by H/W group */
+#define STB_FMIN_VAL_DEFAULT 0x3df
+#define STB_FMAX_VAL_DEFAULT 0x3df
+#define STB_FMAX_VAL_SSC 0x83
+
+static void brcm_stb_sata_ssc_init(struct brcm_sata_port *port)
+{
+ struct brcm_sata_phy *priv = port->phy_priv;
+ u32 tmp;
+
+ /* override the TX spread spectrum setting */
+ tmp = TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL | TXPMD_CONTROL1_TX_SSC_EN_FRC;
+ brcm_sata_phy_wr(port, TXPMD_REG_BANK, TXPMD_CONTROL1, ~tmp, tmp);
+
+ /* set fixed min freq */
+ brcm_sata_phy_wr(port, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL2,
+ ~TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK,
+ STB_FMIN_VAL_DEFAULT);
+
+ /* set fixed max freq depending on SSC config */
+ if (port->ssc_en) {
+ dev_info(priv->dev, "enabling SSC on port%d\n", port->portnum);
+ tmp = STB_FMAX_VAL_SSC;
+ } else {
+ tmp = STB_FMAX_VAL_DEFAULT;
+ }
+
+ brcm_sata_phy_wr(port, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL3,
+ ~TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK, tmp);
+}
+
+#define AEQ_FRC_EQ_VAL_SHIFT 2
+#define AEQ_FRC_EQ_VAL_MASK 0x3f
+
+static int brcm_stb_sata_rxaeq_init(struct brcm_sata_port *port)
+{
+ u32 tmp = 0, reg = 0;
+
+ switch (port->rxaeq_mode) {
+ case RXAEQ_MODE_OFF:
+ return 0;
+
+ case RXAEQ_MODE_AUTO:
+ reg = AEQ_CONTROL1;
+ tmp = AEQ_CONTROL1_ENABLE | AEQ_CONTROL1_FREEZE;
+ break;
+
+ case RXAEQ_MODE_MANUAL:
+ reg = AEQ_FRC_EQ;
+ tmp = AEQ_FRC_EQ_FORCE | AEQ_FRC_EQ_FORCE_VAL;
+ if (port->rxaeq_val > AEQ_FRC_EQ_VAL_MASK)
+ return -EINVAL;
+ tmp |= port->rxaeq_val << AEQ_FRC_EQ_VAL_SHIFT;
+ break;
+ }
+
+ brcm_sata_phy_wr(port, AEQRX_REG_BANK_0, reg, ~tmp, tmp);
+ brcm_sata_phy_wr(port, AEQRX_REG_BANK_1, reg, ~tmp, tmp);
+
+ return 0;
+}
+
+static int brcm_stb_sata_init(struct brcm_sata_port *port)
+{
+ brcm_stb_sata_ssc_init(port);
+
+ return brcm_stb_sata_rxaeq_init(port);
+}
+
+static int brcm_stb_sata_16nm_ssc_init(struct brcm_sata_port *port)
+{
+ u32 tmp, value;
+
+ /* Reduce CP tail current to 1/16th of its default value */
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL6, 0, 0x141);
+
+ /* Turn off CP tail current boost */
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL8, 0, 0xc006);
+
+ /* Set a specific AEQ equalizer value */
+ tmp = AEQ_FRC_EQ_FORCE_VAL | AEQ_FRC_EQ_FORCE;
+ brcm_sata_phy_wr(port, AEQRX_REG_BANK_0, AEQ_FRC_EQ,
+ ~(tmp | AEQ_RFZ_FRC_VAL |
+ AEQ_FRC_EQ_VAL_MASK << AEQ_FRC_EQ_VAL_SHIFT),
+ tmp | 32 << AEQ_FRC_EQ_VAL_SHIFT);
+
+ /* Set RX PPM val center frequency */
+ if (port->ssc_en)
+ value = 0x52;
+ else
+ value = 0;
+ brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CONTROL1,
+ ~RXPMD_RX_PPM_VAL_MASK, value);
+
+ /* Set proportional loop bandwith Gen1/2/3 */
+ tmp = RXPMD_G_CDR_PROP_BW_MASK << RXPMD_G1_CDR_PROP_BW_SHIFT |
+ RXPMD_G_CDR_PROP_BW_MASK << RXPMD_G2_CDR_PROP_BW_SHIFT |
+ RXPMD_G_CDR_PROP_BW_MASK << RXPMD_G3_CDR_PROB_BW_SHIFT;
+ if (port->ssc_en)
+ value = 2 << RXPMD_G1_CDR_PROP_BW_SHIFT |
+ 2 << RXPMD_G2_CDR_PROP_BW_SHIFT |
+ 2 << RXPMD_G3_CDR_PROB_BW_SHIFT;
+ else
+ value = 1 << RXPMD_G1_CDR_PROP_BW_SHIFT |
+ 1 << RXPMD_G2_CDR_PROP_BW_SHIFT |
+ 1 << RXPMD_G3_CDR_PROB_BW_SHIFT;
+ brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CDR_PROP_BW, ~tmp,
+ value);
+
+ /* Set CDR integral loop acquisition bandwidth for Gen1/2/3 */
+ tmp = RXPMD_G_CDR_ACQ_INT_BW_MASK << RXPMD_G1_CDR_ACQ_INT_BW_SHIFT |
+ RXPMD_G_CDR_ACQ_INT_BW_MASK << RXPMD_G2_CDR_ACQ_INT_BW_SHIFT |
+ RXPMD_G_CDR_ACQ_INT_BW_MASK << RXPMD_G3_CDR_ACQ_INT_BW_SHIFT;
+ if (port->ssc_en)
+ value = 1 << RXPMD_G1_CDR_ACQ_INT_BW_SHIFT |
+ 1 << RXPMD_G2_CDR_ACQ_INT_BW_SHIFT |
+ 1 << RXPMD_G3_CDR_ACQ_INT_BW_SHIFT;
+ else
+ value = 0;
+ brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CDR_ACQ_INTEG_BW,
+ ~tmp, value);
+
+ /* Set CDR integral loop locking bandwidth to 1 for Gen 1/2/3 */
+ tmp = RXPMD_G_CDR_LOCK_INT_BW_MASK << RXPMD_G1_CDR_LOCK_INT_BW_SHIFT |
+ RXPMD_G_CDR_LOCK_INT_BW_MASK << RXPMD_G2_CDR_LOCK_INT_BW_SHIFT |
+ RXPMD_G_CDR_LOCK_INT_BW_MASK << RXPMD_G3_CDR_LOCK_INT_BW_SHIFT;
+ if (port->ssc_en)
+ value = 1 << RXPMD_G1_CDR_LOCK_INT_BW_SHIFT |
+ 1 << RXPMD_G2_CDR_LOCK_INT_BW_SHIFT |
+ 1 << RXPMD_G3_CDR_LOCK_INT_BW_SHIFT;
+ else
+ value = 0;
+ brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CDR_LOCK_INTEG_BW,
+ ~tmp, value);
+
+ /* Set no guard band and clamp CDR */
+ tmp = RXPMD_MON_CORRECT_EN | RXPMD_MON_MARGIN_VAL_MASK;
+ if (port->ssc_en)
+ value = 0x51;
+ else
+ value = 0;
+ brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_FREQ_MON_CONTROL1,
+ ~tmp, RXPMD_MON_CORRECT_EN | value);
+
+ tmp = GENMASK(15, 12);
+ switch (port->tx_amplitude_val) {
+ case 400:
+ value = BIT(12) | BIT(13);
+ break;
+ case 500:
+ value = BIT(13);
+ break;
+ case 600:
+ value = BIT(12);
+ break;
+ case 800:
+ value = 0;
+ break;
+ default:
+ value = tmp;
+ break;
+ }
+
+ if (value != tmp)
+ brcm_sata_phy_wr(port, BLOCK1_REG_BANK, BLOCK1_TEST_TX, ~tmp,
+ value);
+
+ /* Turn on/off SSC */
+ brcm_sata_phy_wr(port, TX_REG_BANK, TX_ACTRL5, ~TX_ACTRL5_SSC_EN,
+ port->ssc_en ? TX_ACTRL5_SSC_EN : 0);
+
+ return 0;
+}
+
+static int brcm_stb_sata_16nm_init(struct brcm_sata_port *port)
+{
+ return brcm_stb_sata_16nm_ssc_init(port);
+}
+
+/* NS2 SATA PLL1 defaults were characterized by H/W group */
+#define NS2_PLL1_ACTRL2_MAGIC 0x1df8
+#define NS2_PLL1_ACTRL3_MAGIC 0x2b00
+#define NS2_PLL1_ACTRL4_MAGIC 0x8824
+
+static int brcm_ns2_sata_init(struct brcm_sata_port *port)
+{
+ int try;
+ unsigned int val;
+ void __iomem *ctrl_base = brcm_sata_ctrl_base(port);
+ struct device *dev = port->phy_priv->dev;
+
+ /* Configure OOB control */
+ val = 0x0;
+ val |= (0xc << OOB_CTRL1_BURST_MAX_SHIFT);
+ val |= (0x4 << OOB_CTRL1_BURST_MIN_SHIFT);
+ val |= (0x9 << OOB_CTRL1_WAKE_IDLE_MAX_SHIFT);
+ val |= (0x3 << OOB_CTRL1_WAKE_IDLE_MIN_SHIFT);
+ brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL1, 0x0, val);
+ val = 0x0;
+ val |= (0x1b << OOB_CTRL2_RESET_IDLE_MAX_SHIFT);
+ val |= (0x2 << OOB_CTRL2_BURST_CNT_SHIFT);
+ val |= (0x9 << OOB_CTRL2_RESET_IDLE_MIN_SHIFT);
+ brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL2, 0x0, val);
+
+ /* Configure PHY PLL register bank 1 */
+ val = NS2_PLL1_ACTRL2_MAGIC;
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL2, 0x0, val);
+ val = NS2_PLL1_ACTRL3_MAGIC;
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL3, 0x0, val);
+ val = NS2_PLL1_ACTRL4_MAGIC;
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL4, 0x0, val);
+
+ /* Configure PHY BLOCK0 register bank */
+ /* Set oob_clk_sel to refclk/2 */
+ brcm_sata_phy_wr(port, BLOCK0_REG_BANK, BLOCK0_SPARE,
+ ~BLOCK0_SPARE_OOB_CLK_SEL_MASK,
+ BLOCK0_SPARE_OOB_CLK_SEL_REFBY2);
+
+ /* Strobe PHY reset using PHY control register */
+ writel(PHY_CTRL_1_RESET, ctrl_base + PHY_CTRL_1);
+ mdelay(1);
+ writel(0x0, ctrl_base + PHY_CTRL_1);
+ mdelay(1);
+
+ /* Wait for PHY PLL lock by polling pll_lock bit */
+ try = 50;
+ while (try) {
+ val = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
+ BLOCK0_XGXSSTATUS);
+ if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)
+ break;
+ msleep(20);
+ try--;
+ }
+ if (!try) {
+ /* PLL did not lock; give up */
+ dev_err(dev, "port%d PLL did not lock\n", port->portnum);
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(dev, "port%d initialized\n", port->portnum);
+
+ return 0;
+}
+
+static int brcm_nsp_sata_init(struct brcm_sata_port *port)
+{
+ struct device *dev = port->phy_priv->dev;
+ unsigned int oob_bank;
+ unsigned int val, try;
+
+ /* Configure OOB control */
+ if (port->portnum == 0)
+ oob_bank = OOB_REG_BANK;
+ else if (port->portnum == 1)
+ oob_bank = OOB1_REG_BANK;
+ else
+ return -EINVAL;
+
+ val = 0x0;
+ val |= (0x0f << OOB_CTRL1_BURST_MAX_SHIFT);
+ val |= (0x06 << OOB_CTRL1_BURST_MIN_SHIFT);
+ val |= (0x0f << OOB_CTRL1_WAKE_IDLE_MAX_SHIFT);
+ val |= (0x06 << OOB_CTRL1_WAKE_IDLE_MIN_SHIFT);
+ brcm_sata_phy_wr(port, oob_bank, OOB_CTRL1, 0x0, val);
+
+ val = 0x0;
+ val |= (0x2e << OOB_CTRL2_RESET_IDLE_MAX_SHIFT);
+ val |= (0x02 << OOB_CTRL2_BURST_CNT_SHIFT);
+ val |= (0x16 << OOB_CTRL2_RESET_IDLE_MIN_SHIFT);
+ brcm_sata_phy_wr(port, oob_bank, OOB_CTRL2, 0x0, val);
+
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_ACTRL2,
+ ~(PLL_ACTRL2_SELDIV_MASK << PLL_ACTRL2_SELDIV_SHIFT),
+ 0x0c << PLL_ACTRL2_SELDIV_SHIFT);
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_CAP_CONTROL,
+ 0xff0, 0x4f0);
+
+ val = PLLCONTROL_0_FREQ_DET_RESTART | PLLCONTROL_0_FREQ_MONITOR;
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
+ ~val, val);
+ val = PLLCONTROL_0_SEQ_START;
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
+ ~val, 0);
+ mdelay(10);
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
+ ~val, val);
+
+ /* Wait for pll_seq_done bit */
+ try = 50;
+ while (--try) {
+ val = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
+ BLOCK0_XGXSSTATUS);
+ if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)
+ break;
+ msleep(20);
+ }
+ if (!try) {
+ /* PLL did not lock; give up */
+ dev_err(dev, "port%d PLL did not lock\n", port->portnum);
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(dev, "port%d initialized\n", port->portnum);
+
+ return 0;
+}
+
+/* SR PHY PLL0 registers */
+#define SR_PLL0_ACTRL6_MAGIC 0xa
+
+/* SR PHY PLL1 registers */
+#define SR_PLL1_ACTRL2_MAGIC 0x32
+#define SR_PLL1_ACTRL3_MAGIC 0x2
+#define SR_PLL1_ACTRL4_MAGIC 0x3e8
+
+static int brcm_sr_sata_init(struct brcm_sata_port *port)
+{
+ struct device *dev = port->phy_priv->dev;
+ unsigned int val, try;
+
+ /* Configure PHY PLL register bank 1 */
+ val = SR_PLL1_ACTRL2_MAGIC;
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL2, 0x0, val);
+ val = SR_PLL1_ACTRL3_MAGIC;
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL3, 0x0, val);
+ val = SR_PLL1_ACTRL4_MAGIC;
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL4, 0x0, val);
+
+ /* Configure PHY PLL register bank 0 */
+ val = SR_PLL0_ACTRL6_MAGIC;
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_ACTRL6, 0x0, val);
+
+ /* Wait for PHY PLL lock by polling pll_lock bit */
+ try = 50;
+ do {
+ val = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
+ BLOCK0_XGXSSTATUS);
+ if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)
+ break;
+ msleep(20);
+ try--;
+ } while (try);
+
+ if ((val & BLOCK0_XGXSSTATUS_PLL_LOCK) == 0) {
+ /* PLL did not lock; give up */
+ dev_err(dev, "port%d PLL did not lock\n", port->portnum);
+ return -ETIMEDOUT;
+ }
+
+ /* Invert Tx polarity */
+ brcm_sata_phy_wr(port, TX_REG_BANK, TX_ACTRL0,
+ ~TX_ACTRL0_TXPOL_FLIP, TX_ACTRL0_TXPOL_FLIP);
+
+ /* Configure OOB control to handle 100MHz reference clock */
+ val = ((0xc << OOB_CTRL1_BURST_MAX_SHIFT) |
+ (0x4 << OOB_CTRL1_BURST_MIN_SHIFT) |
+ (0x8 << OOB_CTRL1_WAKE_IDLE_MAX_SHIFT) |
+ (0x3 << OOB_CTRL1_WAKE_IDLE_MIN_SHIFT));
+ brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL1, 0x0, val);
+ val = ((0x1b << OOB_CTRL2_RESET_IDLE_MAX_SHIFT) |
+ (0x2 << OOB_CTRL2_BURST_CNT_SHIFT) |
+ (0x9 << OOB_CTRL2_RESET_IDLE_MIN_SHIFT));
+ brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL2, 0x0, val);
+
+ return 0;
+}
+
+static int brcm_dsl_sata_init(struct brcm_sata_port *port)
+{
+ struct device *dev = port->phy_priv->dev;
+ unsigned int try;
+ u32 tmp;
+
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL7, 0, 0x873);
+
+ brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL6, 0, 0xc000);
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
+ 0, 0x3089);
+ usleep_range(1000, 2000);
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
+ 0, 0x3088);
+ usleep_range(1000, 2000);
+
+ brcm_sata_phy_wr(port, AEQRX_REG_BANK_1, AEQRX_SLCAL0_CTRL0,
+ 0, 0x3000);
+
+ brcm_sata_phy_wr(port, AEQRX_REG_BANK_1, AEQRX_SLCAL1_CTRL0,
+ 0, 0x3000);
+ usleep_range(1000, 2000);
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_CAP_CHARGE_TIME, 0, 0x32);
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_VCO_CAL_THRESH, 0, 0xa);
+
+ brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_FREQ_DET_TIME, 0, 0x64);
+ usleep_range(1000, 2000);
+
+ /* Acquire PLL lock */
+ try = 50;
+ while (try) {
+ tmp = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
+ BLOCK0_XGXSSTATUS);
+ if (tmp & BLOCK0_XGXSSTATUS_PLL_LOCK)
+ break;
+ msleep(20);
+ try--;
+ }
+
+ if (!try) {
+ /* PLL did not lock; give up */
+ dev_err(dev, "port%d PLL did not lock\n", port->portnum);
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(dev, "port%d initialized\n", port->portnum);
+
+ return 0;
+}
+
+static int brcm_sata_phy_init(struct phy *phy)
+{
+ int rc;
+ struct brcm_sata_port *port = phy_get_drvdata(phy);
+
+ switch (port->phy_priv->version) {
+ case BRCM_SATA_PHY_STB_16NM:
+ rc = brcm_stb_sata_16nm_init(port);
+ break;
+ case BRCM_SATA_PHY_STB_28NM:
+ case BRCM_SATA_PHY_STB_40NM:
+ rc = brcm_stb_sata_init(port);
+ break;
+ case BRCM_SATA_PHY_IPROC_NS2:
+ rc = brcm_ns2_sata_init(port);
+ break;
+ case BRCM_SATA_PHY_IPROC_NSP:
+ rc = brcm_nsp_sata_init(port);
+ break;
+ case BRCM_SATA_PHY_IPROC_SR:
+ rc = brcm_sr_sata_init(port);
+ break;
+ case BRCM_SATA_PHY_DSL_28NM:
+ rc = brcm_dsl_sata_init(port);
+ break;
+ default:
+ rc = -ENODEV;
+ }
+
+ return rc;
+}
+
+static void brcm_stb_sata_calibrate(struct brcm_sata_port *port)
+{
+ u32 tmp = BIT(8);
+
+ brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_FREQ_MON_CONTROL1,
+ ~tmp, tmp);
+}
+
+static int brcm_sata_phy_calibrate(struct phy *phy)
+{
+ struct brcm_sata_port *port = phy_get_drvdata(phy);
+ int rc = -EOPNOTSUPP;
+
+ switch (port->phy_priv->version) {
+ case BRCM_SATA_PHY_STB_28NM:
+ case BRCM_SATA_PHY_STB_40NM:
+ brcm_stb_sata_calibrate(port);
+ rc = 0;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static const struct phy_ops phy_ops = {
+ .init = brcm_sata_phy_init,
+ .calibrate = brcm_sata_phy_calibrate,
+ .owner = THIS_MODULE,
+};
+
+static const struct of_device_id brcm_sata_phy_of_match[] = {
+ { .compatible = "brcm,bcm7216-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_STB_16NM },
+ { .compatible = "brcm,bcm7445-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_STB_28NM },
+ { .compatible = "brcm,bcm7425-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_STB_40NM },
+ { .compatible = "brcm,iproc-ns2-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_IPROC_NS2 },
+ { .compatible = "brcm,iproc-nsp-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_IPROC_NSP },
+ { .compatible = "brcm,iproc-sr-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_IPROC_SR },
+ { .compatible = "brcm,bcm63138-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_DSL_28NM },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcm_sata_phy_of_match);
+
+static int brcm_sata_phy_probe(struct platform_device *pdev)
+{
+ const char *rxaeq_mode;
+ struct device *dev = &pdev->dev;
+ struct device_node *dn = dev->of_node, *child;
+ const struct of_device_id *of_id;
+ struct brcm_sata_phy *priv;
+ struct phy_provider *provider;
+ int ret, count = 0;
+
+ if (of_get_child_count(dn) == 0)
+ return -ENODEV;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ dev_set_drvdata(dev, priv);
+ priv->dev = dev;
+
+ priv->phy_base = devm_platform_ioremap_resource_byname(pdev, "phy");
+ if (IS_ERR(priv->phy_base))
+ return PTR_ERR(priv->phy_base);
+
+ of_id = of_match_node(brcm_sata_phy_of_match, dn);
+ if (of_id)
+ priv->version = (uintptr_t)of_id->data;
+ else
+ priv->version = BRCM_SATA_PHY_STB_28NM;
+
+ if (priv->version == BRCM_SATA_PHY_IPROC_NS2) {
+ priv->ctrl_base = devm_platform_ioremap_resource_byname(pdev, "phy-ctrl");
+ if (IS_ERR(priv->ctrl_base))
+ return PTR_ERR(priv->ctrl_base);
+ }
+
+ for_each_available_child_of_node(dn, child) {
+ unsigned int id;
+ struct brcm_sata_port *port;
+
+ if (of_property_read_u32(child, "reg", &id)) {
+ dev_err(dev, "missing reg property in node %pOFn\n",
+ child);
+ ret = -EINVAL;
+ goto put_child;
+ }
+
+ if (id >= MAX_PORTS) {
+ dev_err(dev, "invalid reg: %u\n", id);
+ ret = -EINVAL;
+ goto put_child;
+ }
+ if (priv->phys[id].phy) {
+ dev_err(dev, "already registered port %u\n", id);
+ ret = -EINVAL;
+ goto put_child;
+ }
+
+ port = &priv->phys[id];
+ port->portnum = id;
+ port->phy_priv = priv;
+ port->phy = devm_phy_create(dev, child, &phy_ops);
+ port->rxaeq_mode = RXAEQ_MODE_OFF;
+ if (!of_property_read_string(child, "brcm,rxaeq-mode",
+ &rxaeq_mode))
+ port->rxaeq_mode = rxaeq_to_val(rxaeq_mode);
+ if (port->rxaeq_mode == RXAEQ_MODE_MANUAL)
+ of_property_read_u32(child, "brcm,rxaeq-value",
+ &port->rxaeq_val);
+
+ of_property_read_u32(child, "brcm,tx-amplitude-millivolt",
+ &port->tx_amplitude_val);
+
+ port->ssc_en = of_property_read_bool(child, "brcm,enable-ssc");
+ if (IS_ERR(port->phy)) {
+ dev_err(dev, "failed to create PHY\n");
+ ret = PTR_ERR(port->phy);
+ goto put_child;
+ }
+
+ phy_set_drvdata(port->phy, port);
+ count++;
+ }
+
+ provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(provider)) {
+ dev_err(dev, "could not register PHY provider\n");
+ return PTR_ERR(provider);
+ }
+
+ dev_info(dev, "registered %d port(s)\n", count);
+
+ return 0;
+put_child:
+ of_node_put(child);
+ return ret;
+}
+
+static struct platform_driver brcm_sata_phy_driver = {
+ .probe = brcm_sata_phy_probe,
+ .driver = {
+ .of_match_table = brcm_sata_phy_of_match,
+ .name = "brcm-sata-phy",
+ }
+};
+module_platform_driver(brcm_sata_phy_driver);
+
+MODULE_DESCRIPTION("Broadcom SATA PHY driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marc Carino");
+MODULE_AUTHOR("Brian Norris");
+MODULE_ALIAS("platform:phy-brcm-sata");
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 17:12:52 +0000