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Message-Id: <20171205093334.8261-1-jbrunet@baylibre.com>
Date: Tue, 5 Dec 2017 10:33:34 +0100
From: Jerome Brunet <jbrunet@...libre.com>
To: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Neil Armstrong <narmstrong@...libre.com>
Cc: netdev@...r.kernel.org, linux-amlogic@...ts.infradead.org,
linux-kernel@...r.kernel.org, Jerome Brunet <jbrunet@...libre.com>
Subject: [PATCH net-next] net: phy: meson-gxl: cleanup by defining the control registers
From: Neil Armstrong <narmstrong@...libre.com>
Define registers and bits in meson-gxl PHY driver to make a bit
more human friendly. No functional change
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
drivers/net/phy/meson-gxl.c | 111 +++++++++++++++++++++++++++++++++++++-------
1 file changed, 93 insertions(+), 18 deletions(-)
diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c
index 1ea69b7585d9..82c11556605e 100644
--- a/drivers/net/phy/meson-gxl.c
+++ b/drivers/net/phy/meson-gxl.c
@@ -22,32 +22,107 @@
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
+#include <linux/bitfield.h>
+
+#define TSTCNTL 0x14
+#define TSTREAD1 0x15
+#define TSTREAD2 0x16
+#define TSTWRITE 0x17
+
+#define TSTCNTL_READ BIT(15)
+#define TSTCNTL_WRITE BIT(14)
+#define TSTCNTL_REG_BANK_SEL GENMASK(12, 11)
+#define TSTCNTL_TEST_MODE BIT(10)
+#define TSTCNTL_READ_ADDRESS GENMASK(9, 5)
+#define TSTCNTL_WRITE_ADDRESS GENMASK(4, 0)
+
+#define BANK_ANALOG_DSP 0
+#define BANK_BIST 3
+
+/* Analog/DSP Registers */
+#define A6_CONFIG_REG 0x17
+
+/* BIST Registers */
+#define FR_PLL_CONTROL 0x1b
+#define FR_PLL_DIV0 0x1c
+#define FR_PLL_DIV1 0x1d
+
+#define A6_CONFIG_PLLMULX4ICH BIT(15)
+#define A6_CONFIG_PLLBIASSEL BIT(14)
+#define A6_CONFIG_PLLINTRATIO GENMASK(13, 12)
+#define A6_CONFIG_PLLBUFITRIM GENMASK(11, 9)
+#define A6_CONFIG_PLLCHTRIM GENMASK(8, 5)
+#define A6_CONFIG_PLLCHBIASSEL BIT(4)
+#define A6_CONFIG_PLLRSTVCOPD BIT(3)
+#define A6_CONFIG_PLLCPOFF BIT(2)
+#define A6_CONFIG_PLLPD BIT(1)
+#define A6_CONFIG_PLL_SRC BIT(0)
+
+static inline int meson_gxl_write_reg(struct phy_device *phydev,
+ unsigned int bank, unsigned int reg,
+ uint16_t value)
+{
+ int ret;
+
+ /* Enable Analog and DSP register Bank access by
+ * toggling TSTCNTL_TEST_MODE bit in the TSTCNTL register
+ */
+ ret = phy_write(phydev, TSTCNTL, 0);
+ if (ret)
+ goto out;
+ ret = phy_write(phydev, TSTCNTL, TSTCNTL_TEST_MODE);
+ if (ret)
+ goto out;
+ ret = phy_write(phydev, TSTCNTL, 0);
+ if (ret)
+ goto out;
+ ret = phy_write(phydev, TSTCNTL, TSTCNTL_TEST_MODE);
+ if (ret)
+ goto out;
+
+ ret = phy_write(phydev, TSTWRITE, value);
+ if (ret)
+ goto out;
+
+ ret = phy_write(phydev, TSTCNTL, TSTCNTL_WRITE |
+ FIELD_PREP(TSTCNTL_REG_BANK_SEL, bank) |
+ TSTCNTL_TEST_MODE |
+ FIELD_PREP(TSTCNTL_WRITE_ADDRESS, reg));
+
+out:
+ /* Close the bank access on our way out */
+ phy_write(phydev, TSTCNTL, 0);
+ return ret;
+}
+
static int meson_gxl_config_init(struct phy_device *phydev)
{
- /* Enable Analog and DSP register Bank access by */
- phy_write(phydev, 0x14, 0x0000);
- phy_write(phydev, 0x14, 0x0400);
- phy_write(phydev, 0x14, 0x0000);
- phy_write(phydev, 0x14, 0x0400);
+ int ret;
- /* Write Analog register 23 */
- phy_write(phydev, 0x17, 0x8E0D);
- phy_write(phydev, 0x14, 0x4417);
+ /* Write PLL Configuration 1 */
+ ret = meson_gxl_write_reg(phydev, BANK_ANALOG_DSP, A6_CONFIG_REG,
+ A6_CONFIG_PLLMULX4ICH |
+ FIELD_PREP(A6_CONFIG_PLLBUFITRIM, 7) |
+ A6_CONFIG_PLLRSTVCOPD |
+ A6_CONFIG_PLLCPOFF |
+ A6_CONFIG_PLL_SRC);
+ if (ret)
+ return ret;
- /* Enable fractional PLL */
- phy_write(phydev, 0x17, 0x0005);
- phy_write(phydev, 0x14, 0x5C1B);
+ /* Enable fractional PLL configuration */
+ ret = meson_gxl_write_reg(phydev, BANK_BIST, FR_PLL_CONTROL, 0x5);
+ if (ret)
+ return ret;
- /* Program fraction FR_PLL_DIV1 */
- phy_write(phydev, 0x17, 0x029A);
- phy_write(phydev, 0x14, 0x5C1D);
+ ret = meson_gxl_write_reg(phydev, BANK_BIST, FR_PLL_DIV1, 0x029a);
+ if (ret)
+ return ret;
- /* Program fraction FR_PLL_DIV1 */
- phy_write(phydev, 0x17, 0xAAAA);
- phy_write(phydev, 0x14, 0x5C1C);
+ /* Program fraction FR_PLL_DIV0 */
+ ret = meson_gxl_write_reg(phydev, BANK_BIST, FR_PLL_DIV0, 0xaaaa);
- return 0;
+ return ret;
}
static struct phy_driver meson_gxl_phy[] = {
--
2.14.3
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