summaryrefslogtreecommitdiff
path: root/board/gdsys/common/phy.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/gdsys/common/phy.c')
-rw-r--r--board/gdsys/common/phy.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/board/gdsys/common/phy.c b/board/gdsys/common/phy.c
new file mode 100644
index 0000000..fb92658
--- /dev/null
+++ b/board/gdsys/common/phy.c
@@ -0,0 +1,280 @@
+/*
+ * (C) Copyright 2014
+ * Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+
+#include <miiphy.h>
+
+enum {
+ MIICMD_SET,
+ MIICMD_MODIFY,
+ MIICMD_VERIFY_VALUE,
+ MIICMD_WAIT_FOR_VALUE,
+};
+
+struct mii_setupcmd {
+ u8 token;
+ u8 reg;
+ u16 data;
+ u16 mask;
+ u32 timeout;
+};
+
+/*
+ * verify we are talking to a 88e1518
+ */
+struct mii_setupcmd verify_88e1518[] = {
+ { MIICMD_SET, 22, 0x0000 },
+ { MIICMD_VERIFY_VALUE, 2, 0x0141, 0xffff },
+ { MIICMD_VERIFY_VALUE, 3, 0x0dd0, 0xfff0 },
+};
+
+/*
+ * workaround for erratum mentioned in 88E1518 release notes
+ */
+struct mii_setupcmd fixup_88e1518[] = {
+ { MIICMD_SET, 22, 0x00ff },
+ { MIICMD_SET, 17, 0x214b },
+ { MIICMD_SET, 16, 0x2144 },
+ { MIICMD_SET, 17, 0x0c28 },
+ { MIICMD_SET, 16, 0x2146 },
+ { MIICMD_SET, 17, 0xb233 },
+ { MIICMD_SET, 16, 0x214d },
+ { MIICMD_SET, 17, 0xcc0c },
+ { MIICMD_SET, 16, 0x2159 },
+ { MIICMD_SET, 22, 0x00fb },
+ { MIICMD_SET, 7, 0xc00d },
+ { MIICMD_SET, 22, 0x0000 },
+};
+
+/*
+ * default initialization:
+ * - set RGMII receive timing to "receive clock transition when data stable"
+ * - set RGMII transmit timing to "transmit clock internally delayed"
+ * - set RGMII output impedance target to 78,8 Ohm
+ * - run output impedance calibration
+ * - set autonegotiation advertise to 1000FD only
+ */
+struct mii_setupcmd default_88e1518[] = {
+ { MIICMD_SET, 22, 0x0002 },
+ { MIICMD_MODIFY, 21, 0x0030, 0x0030 },
+ { MIICMD_MODIFY, 25, 0x0000, 0x0003 },
+ { MIICMD_MODIFY, 24, 0x8000, 0x8000 },
+ { MIICMD_WAIT_FOR_VALUE, 24, 0x4000, 0x4000, 2000 },
+ { MIICMD_SET, 22, 0x0000 },
+ { MIICMD_MODIFY, 4, 0x0000, 0x01e0 },
+ { MIICMD_MODIFY, 9, 0x0200, 0x0300 },
+};
+
+/*
+ * turn off CLK125 for PHY daughterboard
+ */
+struct mii_setupcmd ch1fix_88e1518[] = {
+ { MIICMD_SET, 22, 0x0002 },
+ { MIICMD_MODIFY, 16, 0x0006, 0x0006 },
+ { MIICMD_SET, 22, 0x0000 },
+};
+
+/*
+ * perform copper software reset
+ */
+struct mii_setupcmd swreset_88e1518[] = {
+ { MIICMD_SET, 22, 0x0000 },
+ { MIICMD_MODIFY, 0, 0x8000, 0x8000 },
+ { MIICMD_WAIT_FOR_VALUE, 0, 0x0000, 0x8000, 2000 },
+};
+
+/*
+ * special one for 88E1514:
+ * Force SGMII to Copper mode
+ */
+struct mii_setupcmd mii_to_copper_88e1514[] = {
+ { MIICMD_SET, 22, 0x0012 },
+ { MIICMD_MODIFY, 20, 0x0001, 0x0007 },
+ { MIICMD_MODIFY, 20, 0x8000, 0x8000 },
+ { MIICMD_SET, 22, 0x0000 },
+};
+
+/*
+ * turn off SGMII auto-negotiation
+ */
+struct mii_setupcmd sgmii_autoneg_off_88e1518[] = {
+ { MIICMD_SET, 22, 0x0001 },
+ { MIICMD_MODIFY, 0, 0x0000, 0x1000 },
+ { MIICMD_MODIFY, 0, 0x8000, 0x8000 },
+ { MIICMD_SET, 22, 0x0000 },
+};
+
+/*
+ * invert LED2 polarity
+ */
+struct mii_setupcmd invert_led2_88e1514[] = {
+ { MIICMD_SET, 22, 0x0003 },
+ { MIICMD_MODIFY, 17, 0x0030, 0x0010 },
+ { MIICMD_SET, 22, 0x0000 },
+};
+
+static int process_setupcmd(const char *bus, unsigned char addr,
+ struct mii_setupcmd *setupcmd)
+{
+ int res;
+ u8 reg = setupcmd->reg;
+ u16 data = setupcmd->data;
+ u16 mask = setupcmd->mask;
+ u32 timeout = setupcmd->timeout;
+ u16 orig_data;
+ unsigned long start;
+
+ debug("mii %s:%u reg %2u ", bus, addr, reg);
+
+ switch (setupcmd->token) {
+ case MIICMD_MODIFY:
+ res = miiphy_read(bus, addr, reg, &orig_data);
+ if (res)
+ break;
+ debug("is %04x. (value %04x mask %04x) ", orig_data, data,
+ mask);
+ data = (orig_data & ~mask) | (data & mask);
+ /* fallthrough */
+ case MIICMD_SET:
+ debug("=> %04x\n", data);
+ res = miiphy_write(bus, addr, reg, data);
+ break;
+ case MIICMD_VERIFY_VALUE:
+ res = miiphy_read(bus, addr, reg, &orig_data);
+ if (res)
+ break;
+ if ((orig_data & mask) != (data & mask))
+ res = -1;
+ debug("(value %04x mask %04x) == %04x? %s\n", data, mask,
+ orig_data, res ? "FAIL" : "PASS");
+ break;
+ case MIICMD_WAIT_FOR_VALUE:
+ res = -1;
+ start = get_timer(0);
+ while ((res != 0) && (get_timer(start) < timeout)) {
+ res = miiphy_read(bus, addr, reg, &orig_data);
+ if (res)
+ continue;
+ if ((orig_data & mask) != (data & mask))
+ res = -1;
+ }
+ debug("(value %04x mask %04x) == %04x? %s after %lu ms\n", data,
+ mask, orig_data, res ? "FAIL" : "PASS",
+ get_timer(start));
+ break;
+ default:
+ res = -1;
+ break;
+ }
+
+ return res;
+}
+
+static int process_setup(const char *bus, unsigned char addr,
+ struct mii_setupcmd *setupcmd, unsigned int count)
+{
+ int res = 0;
+ unsigned int k;
+
+ for (k = 0; k < count; ++k) {
+ res = process_setupcmd(bus, addr, &setupcmd[k]);
+ if (res) {
+ printf("mii cmd %u on bus %s addr %u failed, aborting setup\n",
+ setupcmd[k].token, bus, addr);
+ break;
+ }
+ }
+
+ return res;
+}
+
+int setup_88e1518(const char *bus, unsigned char addr)
+{
+ int res;
+
+ res = process_setup(bus, addr,
+ verify_88e1518, ARRAY_SIZE(verify_88e1518));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ fixup_88e1518, ARRAY_SIZE(fixup_88e1518));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ default_88e1518, ARRAY_SIZE(default_88e1518));
+ if (res)
+ return res;
+
+ if (addr) {
+ res = process_setup(bus, addr,
+ ch1fix_88e1518, ARRAY_SIZE(ch1fix_88e1518));
+ if (res)
+ return res;
+ }
+
+ res = process_setup(bus, addr,
+ swreset_88e1518, ARRAY_SIZE(swreset_88e1518));
+ if (res)
+ return res;
+
+ return 0;
+}
+
+int setup_88e1514(const char *bus, unsigned char addr)
+{
+ int res;
+
+ res = process_setup(bus, addr,
+ verify_88e1518, ARRAY_SIZE(verify_88e1518));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ fixup_88e1518, ARRAY_SIZE(fixup_88e1518));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ mii_to_copper_88e1514,
+ ARRAY_SIZE(mii_to_copper_88e1514));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ sgmii_autoneg_off_88e1518,
+ ARRAY_SIZE(sgmii_autoneg_off_88e1518));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ invert_led2_88e1514,
+ ARRAY_SIZE(invert_led2_88e1514));
+ if (res)
+ return res;
+
+ res = process_setup(bus, addr,
+ default_88e1518, ARRAY_SIZE(default_88e1518));
+ if (res)
+ return res;
+
+ if (addr) {
+ res = process_setup(bus, addr,
+ ch1fix_88e1518, ARRAY_SIZE(ch1fix_88e1518));
+ if (res)
+ return res;
+ }
+
+ res = process_setup(bus, addr,
+ swreset_88e1518, ARRAY_SIZE(swreset_88e1518));
+ if (res)
+ return res;
+
+ return 0;
+}