net: qcom/emac: move phy init code to separate files

The internal PHY of the EMAC differs on each SOC, and the list will
only continue to grow.  By separating the code into individual files,
we can add support for more SOCs more cleanly.

Note: The internal PHY is also sometimes called the SGMII device.

We also stop referring to the various PHY variations by version number,
so no more "v2", "v3", etc.  Instead, the devices are named after the
SOC they are, which is in sync with the device tree property names.

Future patches will probably rearrange more code among the files.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 245 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c b/drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c
new file mode 100644
index 000000000000..af690e1a6e7b
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c
@@ -0,0 +1,245 @@
+/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/* Qualcomm Technologies, Inc. FSM9900 EMAC SGMII Controller driver.
+ */
+
+#include <linux/iopoll.h>
+#include "emac.h"
+
+/* EMAC_QSERDES register offsets */
+#define EMAC_QSERDES_COM_SYS_CLK_CTRL		0x0000
+#define EMAC_QSERDES_COM_PLL_CNTRL		0x0014
+#define EMAC_QSERDES_COM_PLL_IP_SETI		0x0018
+#define EMAC_QSERDES_COM_PLL_CP_SETI		0x0024
+#define EMAC_QSERDES_COM_PLL_IP_SETP		0x0028
+#define EMAC_QSERDES_COM_PLL_CP_SETP		0x002c
+#define EMAC_QSERDES_COM_SYSCLK_EN_SEL		0x0038
+#define EMAC_QSERDES_COM_RESETSM_CNTRL		0x0040
+#define EMAC_QSERDES_COM_PLLLOCK_CMP1		0x0044
+#define EMAC_QSERDES_COM_PLLLOCK_CMP2		0x0048
+#define EMAC_QSERDES_COM_PLLLOCK_CMP3		0x004c
+#define EMAC_QSERDES_COM_PLLLOCK_CMP_EN		0x0050
+#define EMAC_QSERDES_COM_DEC_START1		0x0064
+#define EMAC_QSERDES_COM_DIV_FRAC_START1	0x0098
+#define EMAC_QSERDES_COM_DIV_FRAC_START2	0x009c
+#define EMAC_QSERDES_COM_DIV_FRAC_START3	0x00a0
+#define EMAC_QSERDES_COM_DEC_START2		0x00a4
+#define EMAC_QSERDES_COM_PLL_CRCTRL		0x00ac
+#define EMAC_QSERDES_COM_RESET_SM		0x00bc
+#define EMAC_QSERDES_TX_BIST_MODE_LANENO	0x0100
+#define EMAC_QSERDES_TX_TX_EMP_POST1_LVL	0x0108
+#define EMAC_QSERDES_TX_TX_DRV_LVL		0x010c
+#define EMAC_QSERDES_TX_LANE_MODE		0x0150
+#define EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN	0x0170
+#define EMAC_QSERDES_RX_CDR_CONTROL		0x0200
+#define EMAC_QSERDES_RX_CDR_CONTROL2		0x0210
+#define EMAC_QSERDES_RX_RX_EQ_GAIN12		0x0230
+
+/* EMAC_SGMII register offsets */
+#define EMAC_SGMII_PHY_SERDES_START		0x0000
+#define EMAC_SGMII_PHY_CMN_PWR_CTRL		0x0004
+#define EMAC_SGMII_PHY_RX_PWR_CTRL		0x0008
+#define EMAC_SGMII_PHY_TX_PWR_CTRL		0x000C
+#define EMAC_SGMII_PHY_LANE_CTRL1		0x0018
+#define EMAC_SGMII_PHY_CDR_CTRL0		0x0058
+#define EMAC_SGMII_PHY_POW_DWN_CTRL0		0x0080
+#define EMAC_SGMII_PHY_INTERRUPT_MASK		0x00b4
+
+#define PLL_IPSETI(x)				((x) & 0x3f)
+
+#define PLL_CPSETI(x)				((x) & 0xff)
+
+#define PLL_IPSETP(x)				((x) & 0x3f)
+
+#define PLL_CPSETP(x)				((x) & 0x1f)
+
+#define PLL_RCTRL(x)				(((x) & 0xf) << 4)
+#define PLL_CCTRL(x)				((x) & 0xf)
+
+#define LANE_MODE(x)				((x) & 0x1f)
+
+#define SYSCLK_CM				BIT(4)
+#define SYSCLK_AC_COUPLE			BIT(3)
+
+#define OCP_EN					BIT(5)
+#define PLL_DIV_FFEN				BIT(2)
+#define PLL_DIV_ORD				BIT(1)
+
+#define SYSCLK_SEL_CMOS				BIT(3)
+
+#define FRQ_TUNE_MODE				BIT(4)
+
+#define PLLLOCK_CMP_EN				BIT(0)
+
+#define DEC_START1_MUX				BIT(7)
+#define DEC_START1(x)				((x) & 0x7f)
+
+#define DIV_FRAC_START_MUX			BIT(7)
+#define DIV_FRAC_START(x)			((x) & 0x7f)
+
+#define DIV_FRAC_START3_MUX			BIT(4)
+#define DIV_FRAC_START3(x)			((x) & 0xf)
+
+#define DEC_START2_MUX				BIT(1)
+#define DEC_START2				BIT(0)
+
+#define READY					BIT(5)
+
+#define TX_EMP_POST1_LVL_MUX			BIT(5)
+#define TX_EMP_POST1_LVL(x)			((x) & 0x1f)
+
+#define TX_DRV_LVL_MUX				BIT(4)
+#define TX_DRV_LVL(x)				((x) & 0xf)
+
+#define EMP_EN_MUX				BIT(1)
+#define EMP_EN					BIT(0)
+
+#define SECONDORDERENABLE			BIT(6)
+#define FIRSTORDER_THRESH(x)			(((x) & 0x7) << 3)
+#define SECONDORDERGAIN(x)			((x) & 0x7)
+
+#define RX_EQ_GAIN2(x)				(((x) & 0xf) << 4)
+#define RX_EQ_GAIN1(x)				((x) & 0xf)
+
+#define SERDES_START				BIT(0)
+
+#define BIAS_EN					BIT(6)
+#define PLL_EN					BIT(5)
+#define SYSCLK_EN				BIT(4)
+#define CLKBUF_L_EN				BIT(3)
+#define PLL_TXCLK_EN				BIT(1)
+#define PLL_RXCLK_EN				BIT(0)
+
+#define L0_RX_SIGDET_EN				BIT(7)
+#define L0_RX_TERM_MODE(x)			(((x) & 3) << 4)
+#define L0_RX_I_EN				BIT(1)
+
+#define L0_TX_EN				BIT(5)
+#define L0_CLKBUF_EN				BIT(4)
+#define L0_TRAN_BIAS_EN				BIT(1)
+
+#define L0_RX_EQUALIZE_ENABLE			BIT(6)
+#define L0_RESET_TSYNC_EN			BIT(4)
+#define L0_DRV_LVL(x)				((x) & 0xf)
+
+#define PWRDN_B					BIT(0)
+#define CDR_MAX_CNT(x)				((x) & 0xff)
+
+#define PLLLOCK_CMP(x)				((x) & 0xff)
+
+#define SERDES_START_WAIT_TIMES			100
+
+struct emac_reg_write {
+	unsigned int offset;
+	u32 val;
+};
+
+static void emac_reg_write_all(void __iomem *base,
+			       const struct emac_reg_write *itr, size_t size)
+{
+	size_t i;
+
+	for (i = 0; i < size; ++itr, ++i)
+		writel(itr->val, base + itr->offset);
+}
+
+static const struct emac_reg_write physical_coding_sublayer_programming[] = {
+	{EMAC_SGMII_PHY_CDR_CTRL0, CDR_MAX_CNT(15)},
+	{EMAC_SGMII_PHY_POW_DWN_CTRL0, PWRDN_B},
+	{EMAC_SGMII_PHY_CMN_PWR_CTRL,
+		BIAS_EN | SYSCLK_EN | CLKBUF_L_EN | PLL_TXCLK_EN | PLL_RXCLK_EN},
+	{EMAC_SGMII_PHY_TX_PWR_CTRL, L0_TX_EN | L0_CLKBUF_EN | L0_TRAN_BIAS_EN},
+	{EMAC_SGMII_PHY_RX_PWR_CTRL,
+		L0_RX_SIGDET_EN | L0_RX_TERM_MODE(1) | L0_RX_I_EN},
+	{EMAC_SGMII_PHY_CMN_PWR_CTRL,
+		BIAS_EN | PLL_EN | SYSCLK_EN | CLKBUF_L_EN | PLL_TXCLK_EN |
+		PLL_RXCLK_EN},
+	{EMAC_SGMII_PHY_LANE_CTRL1,
+		L0_RX_EQUALIZE_ENABLE | L0_RESET_TSYNC_EN | L0_DRV_LVL(15)},
+};
+
+static const struct emac_reg_write sysclk_refclk_setting[] = {
+	{EMAC_QSERDES_COM_SYSCLK_EN_SEL, SYSCLK_SEL_CMOS},
+	{EMAC_QSERDES_COM_SYS_CLK_CTRL,	SYSCLK_CM | SYSCLK_AC_COUPLE},
+};
+
+static const struct emac_reg_write pll_setting[] = {
+	{EMAC_QSERDES_COM_PLL_IP_SETI, PLL_IPSETI(1)},
+	{EMAC_QSERDES_COM_PLL_CP_SETI, PLL_CPSETI(59)},
+	{EMAC_QSERDES_COM_PLL_IP_SETP, PLL_IPSETP(10)},
+	{EMAC_QSERDES_COM_PLL_CP_SETP, PLL_CPSETP(9)},
+	{EMAC_QSERDES_COM_PLL_CRCTRL, PLL_RCTRL(15) | PLL_CCTRL(11)},
+	{EMAC_QSERDES_COM_PLL_CNTRL, OCP_EN | PLL_DIV_FFEN | PLL_DIV_ORD},
+	{EMAC_QSERDES_COM_DEC_START1, DEC_START1_MUX | DEC_START1(2)},
+	{EMAC_QSERDES_COM_DEC_START2, DEC_START2_MUX | DEC_START2},
+	{EMAC_QSERDES_COM_DIV_FRAC_START1,
+		DIV_FRAC_START_MUX | DIV_FRAC_START(85)},
+	{EMAC_QSERDES_COM_DIV_FRAC_START2,
+		DIV_FRAC_START_MUX | DIV_FRAC_START(42)},
+	{EMAC_QSERDES_COM_DIV_FRAC_START3,
+		DIV_FRAC_START3_MUX | DIV_FRAC_START3(3)},
+	{EMAC_QSERDES_COM_PLLLOCK_CMP1, PLLLOCK_CMP(43)},
+	{EMAC_QSERDES_COM_PLLLOCK_CMP2, PLLLOCK_CMP(104)},
+	{EMAC_QSERDES_COM_PLLLOCK_CMP3, PLLLOCK_CMP(0)},
+	{EMAC_QSERDES_COM_PLLLOCK_CMP_EN, PLLLOCK_CMP_EN},
+	{EMAC_QSERDES_COM_RESETSM_CNTRL, FRQ_TUNE_MODE},
+};
+
+static const struct emac_reg_write cdr_setting[] = {
+	{EMAC_QSERDES_RX_CDR_CONTROL,
+		SECONDORDERENABLE | FIRSTORDER_THRESH(3) | SECONDORDERGAIN(2)},
+	{EMAC_QSERDES_RX_CDR_CONTROL2,
+		SECONDORDERENABLE | FIRSTORDER_THRESH(3) | SECONDORDERGAIN(4)},
+};
+
+static const struct emac_reg_write tx_rx_setting[] = {
+	{EMAC_QSERDES_TX_BIST_MODE_LANENO, 0},
+	{EMAC_QSERDES_TX_TX_DRV_LVL, TX_DRV_LVL_MUX | TX_DRV_LVL(15)},
+	{EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN, EMP_EN_MUX | EMP_EN},
+	{EMAC_QSERDES_TX_TX_EMP_POST1_LVL,
+		TX_EMP_POST1_LVL_MUX | TX_EMP_POST1_LVL(1)},
+	{EMAC_QSERDES_RX_RX_EQ_GAIN12, RX_EQ_GAIN2(15) | RX_EQ_GAIN1(15)},
+	{EMAC_QSERDES_TX_LANE_MODE, LANE_MODE(8)},
+};
+
+int emac_sgmii_init_fsm9900(struct emac_adapter *adpt)
+{
+	struct emac_phy *phy = &adpt->phy;
+	unsigned int i;
+
+	emac_reg_write_all(phy->base, physical_coding_sublayer_programming,
+			   ARRAY_SIZE(physical_coding_sublayer_programming));
+	emac_reg_write_all(phy->base, sysclk_refclk_setting,
+			   ARRAY_SIZE(sysclk_refclk_setting));
+	emac_reg_write_all(phy->base, pll_setting, ARRAY_SIZE(pll_setting));
+	emac_reg_write_all(phy->base, cdr_setting, ARRAY_SIZE(cdr_setting));
+	emac_reg_write_all(phy->base, tx_rx_setting, ARRAY_SIZE(tx_rx_setting));
+
+	/* Power up the Ser/Des engine */
+	writel(SERDES_START, phy->base + EMAC_SGMII_PHY_SERDES_START);
+
+	for (i = 0; i < SERDES_START_WAIT_TIMES; i++) {
+		if (readl(phy->base + EMAC_QSERDES_COM_RESET_SM) & READY)
+			break;
+		usleep_range(100, 200);
+	}
+
+	if (i == SERDES_START_WAIT_TIMES) {
+		netdev_err(adpt->netdev, "error: ser/des failed to start\n");
+		return -EIO;
+	}
+	/* Mask out all the SGMII Interrupt */
+	writel(0, phy->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+
+	return 0;
+}