[PATCH v2 2/5] phy: Add support for NS2 SATA3 PHY in Broadcom SATA3 PHY driver
Anup Patel
anup.patel at broadcom.com
Sun Mar 27 21:48:27 PDT 2016
This patch adds support for Broadcom NS2 SATA3 PHY in existing
Broadcom SATA3 PHY driver.
Signed-off-by: Anup Patel <anup.patel at broadcom.com>
---
drivers/phy/phy-brcm-sata.c | 238 +++++++++++++++++++++++++++++++++++++-------
1 file changed, 200 insertions(+), 38 deletions(-)
diff --git a/drivers/phy/phy-brcm-sata.c b/drivers/phy/phy-brcm-sata.c
index c97b9d6..6c4c5cb 100644
--- a/drivers/phy/phy-brcm-sata.c
+++ b/drivers/phy/phy-brcm-sata.c
@@ -14,6 +14,7 @@
* GNU General Public License for more details.
*/
+#include <linux/delay.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -24,22 +25,26 @@
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
-#define SATA_MDIO_BANK_OFFSET 0x23c
-#define SATA_MDIO_REG_OFFSET(ofs) ((ofs) * 4)
+#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_MDIO_REG_28NM_SPACE_SIZE 0x1000
+#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_MDIO_REG_40NM_SPACE_SIZE 0x10
+#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_28NM,
- BRCM_SATA_PHY_40NM,
+ BRCM_SATA_PHY_STB_28NM,
+ BRCM_SATA_PHY_STB_40NM,
+ BRCM_SATA_PHY_IPROC_NS2,
};
struct brcm_sata_port {
@@ -52,15 +57,48 @@ struct brcm_sata_port {
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_mdio_phy_regs {
- PLL_REG_BANK_0 = 0x50,
+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,
+
+ PLL_REG_BANK_0 = 0x050,
PLL_REG_BANK_0_PLLCONTROL_0 = 0x81,
+ PLL1_REG_BANK = 0x060,
+ PLL1_ACTRL2 = 0x82,
+ PLL1_ACTRL3 = 0x83,
+ PLL1_ACTRL4 = 0x84,
+
+ OOB_REG_BANK = 0x150,
+ 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),
@@ -72,69 +110,183 @@ enum sata_mdio_phy_regs {
TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK = 0x3ff,
};
-static inline void __iomem *brcm_sata_phy_base(struct brcm_sata_port *port)
+enum sata_phy_ctrl_regs {
+ PHY_CTRL_1 = 0x0,
+ PHY_CTRL_1_RESET = BIT(0),
+};
+
+static inline void __iomem *brcm_sata_pcb_base(struct brcm_sata_port *port)
{
struct brcm_sata_phy *priv = port->phy_priv;
- u32 offset = 0;
+ u32 size = 0;
+
+ switch (priv->version) {
+ case BRCM_SATA_PHY_STB_28NM:
+ case BRCM_SATA_PHY_IPROC_NS2:
+ size = SATA_PCB_REG_28NM_SPACE_SIZE;
+ break;
+ case BRCM_SATA_PHY_STB_40NM:
+ size = SATA_PCB_REG_40NM_SPACE_SIZE;
+ break;
+ default:
+ dev_err(priv->dev, "invalid phy version\n");
+ break;
+ };
- if (priv->version == BRCM_SATA_PHY_28NM)
- offset = SATA_MDIO_REG_28NM_SPACE_SIZE;
- else if (priv->version == BRCM_SATA_PHY_40NM)
- offset = SATA_MDIO_REG_40NM_SPACE_SIZE;
- else
+ return priv->phy_base + (port->portnum * size);
+}
+
+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->phy_base + (port->portnum * offset);
+ return priv->ctrl_base + (port->portnum * size);
}
-static void brcm_sata_mdio_wr(void __iomem *addr, u32 bank, u32 ofs,
- u32 msk, u32 value)
+static void brcm_sata_phy_wr(void __iomem *pcb_base, u32 bank,
+ u32 ofs, u32 msk, u32 value)
{
u32 tmp;
- writel(bank, addr + SATA_MDIO_BANK_OFFSET);
- tmp = readl(addr + SATA_MDIO_REG_OFFSET(ofs));
+ writel(bank, pcb_base + SATA_PCB_BANK_OFFSET);
+ tmp = readl(pcb_base + SATA_PCB_REG_OFFSET(ofs));
tmp = (tmp & msk) | value;
- writel(tmp, addr + SATA_MDIO_REG_OFFSET(ofs));
+ writel(tmp, pcb_base + SATA_PCB_REG_OFFSET(ofs));
+}
+
+static u32 brcm_sata_phy_rd(void __iomem *pcb_base, u32 bank, u32 ofs)
+{
+ 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 FMIN_VAL_DEFAULT 0x3df
-#define FMAX_VAL_DEFAULT 0x3df
-#define FMAX_VAL_SSC 0x83
+#define STB_FMIN_VAL_DEFAULT 0x3df
+#define STB_FMAX_VAL_DEFAULT 0x3df
+#define STB_FMAX_VAL_SSC 0x83
-static void brcm_sata_cfg_ssc(struct brcm_sata_port *port)
+static int brcm_stb_sata_init(struct brcm_sata_port *port)
{
- void __iomem *base = brcm_sata_phy_base(port);
+ void __iomem *base = brcm_sata_pcb_base(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_mdio_wr(base, TXPMD_REG_BANK, TXPMD_CONTROL1, ~tmp, tmp);
+ brcm_sata_phy_wr(base, TXPMD_REG_BANK, TXPMD_CONTROL1, ~tmp, tmp);
/* set fixed min freq */
- brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL2,
- ~TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK,
- FMIN_VAL_DEFAULT);
+ brcm_sata_phy_wr(base, 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 = FMAX_VAL_SSC;
+ dev_info(priv->dev, "enabling SSC on port%d\n", port->portnum);
+ tmp = STB_FMAX_VAL_SSC;
} else {
- tmp = FMAX_VAL_DEFAULT;
+ tmp = STB_FMAX_VAL_DEFAULT;
}
- brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL3,
+ brcm_sata_phy_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL3,
~TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK, tmp);
+
+ return 0;
+}
+
+/* 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 *base = brcm_sata_pcb_base(port);
+ 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(base, 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(base, OOB_REG_BANK, OOB_CTRL2, 0x0, val);
+
+ /* Configure PHY PLL register bank 1 */
+ val = NS2_PLL1_ACTRL2_MAGIC;
+ brcm_sata_phy_wr(base, PLL1_REG_BANK, PLL1_ACTRL2, 0x0, val);
+ val = NS2_PLL1_ACTRL3_MAGIC;
+ brcm_sata_phy_wr(base, PLL1_REG_BANK, PLL1_ACTRL3, 0x0, val);
+ val = NS2_PLL1_ACTRL4_MAGIC;
+ brcm_sata_phy_wr(base, PLL1_REG_BANK, PLL1_ACTRL4, 0x0, val);
+
+ /* Configure PHY BLOCK0 register bank */
+ /* Set oob_clk_sel to refclk/2 */
+ brcm_sata_phy_wr(base, 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(base, 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_sata_phy_init(struct phy *phy)
{
+ int rc;
struct brcm_sata_port *port = phy_get_drvdata(phy);
- brcm_sata_cfg_ssc(port);
+ switch (port->phy_priv->version) {
+ 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;
+ default:
+ rc = -ENODEV;
+ };
return 0;
}
@@ -146,9 +298,11 @@ static const struct phy_ops phy_ops = {
static const struct of_device_id brcm_sata_phy_of_match[] = {
{ .compatible = "brcm,bcm7445-sata-phy",
- .data = (void *)BRCM_SATA_PHY_28NM },
+ .data = (void *)BRCM_SATA_PHY_STB_28NM },
{ .compatible = "brcm,bcm7425-sata-phy",
- .data = (void *)BRCM_SATA_PHY_40NM },
+ .data = (void *)BRCM_SATA_PHY_STB_40NM },
+ { .compatible = "brcm,iproc-ns2-sata-phy",
+ .data = (void *)BRCM_SATA_PHY_IPROC_NS2 },
{},
};
MODULE_DEVICE_TABLE(of, brcm_sata_phy_of_match);
@@ -181,7 +335,15 @@ static int brcm_sata_phy_probe(struct platform_device *pdev)
if (of_id)
priv->version = (enum brcm_sata_phy_version)of_id->data;
else
- priv->version = BRCM_SATA_PHY_28NM;
+ priv->version = BRCM_SATA_PHY_STB_28NM;
+
+ if (priv->version == BRCM_SATA_PHY_IPROC_NS2) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "phy-ctrl");
+ priv->ctrl_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->ctrl_base))
+ return PTR_ERR(priv->ctrl_base);
+ }
for_each_available_child_of_node(dn, child) {
unsigned int id;
--
1.9.1
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