[U-Boot] [PATCH 1/3 v3] Bit-banged MII driver with multi-bus support.
Luigi 'Comio' Mantellini
luigi.mantellini.ml at gmail.com
Wed Sep 23 15:10:54 CEST 2009
From: Luigi 'Comio' Mantellini <luigi.mantellini at idf-hit.com>
Signed-off-by: Luigi 'Comio' Mantellini <luigi.mantellini at idf-hit.com>
---
drivers/net/phy/miiphybb.c | 324 +++++++++++++++++++++++++++++++-------------
include/miiphy.h | 22 +++
2 files changed, 250 insertions(+), 96 deletions(-)
diff --git a/drivers/net/phy/miiphybb.c b/drivers/net/phy/miiphybb.c
index b77c917..1ed27f1 100644
--- a/drivers/net/phy/miiphybb.c
+++ b/drivers/net/phy/miiphybb.c
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright 2009 Industrie Dial Face S.p.A.
+ * Luigi 'Comio' Mantellini <luigi.mantellini at idf-hit.com>
+ *
* (C) Copyright 2001
* Gerald Van Baren, Custom IDEAS, vanbaren at cideas.com.
*
@@ -29,18 +32,137 @@
#include <common.h>
#include <ioports.h>
#include <ppc_asm.tmpl>
+#include <miiphy.h>
+
+#define BBMII_RELOATE(v,off) (v += (v?off:0))
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_BITBANGMII_MULTI
+/*
+ * If CONFIG_BITBANGMII_MULTI is not defined we use a
+ * compatibility layer with the previous miiphybb implementation
+ * based on macros usage.
+ *
+ */
+static int bb_mii_init_wrap(struct bbmiibus *bus)
+{
+#ifdef MII_INIT
+ MII_INIT;
+#endif
+ return 0;
+}
+
+static int bb_mdio_active_wrap(struct bbmiibus *bus)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ MDIO_ACTIVE;
+ return 0;
+}
+
+static int bb_mdio_tristate_wrap(struct bbmiibus *bus)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ MDIO_TRISTATE;
+ return 0;
+}
+
+static int bb_set_mdio_wrap(struct bbmiibus *bus, int v)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ MDIO (v);
+ return 0;
+}
+
+static int bb_get_mdio_wrap(struct bbmiibus *bus, int *v)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ *v = MDIO_READ;
+ return 0;
+}
+
+static int bb_set_mdc_wrap(struct bbmiibus *bus, int v)
+{
+#ifdef MDC_DECLARE
+ MDC_DECLARE;
+#endif
+ MDC (v);
+ return 0;
+}
+
+static int bb_delay_wrap(struct bbmiibus *bus)
+{
+ MIIDELAY;
+ return 0;
+}
+
+struct bbmiibus bbmiibusses[] = {
+ {
+ .name = BB_MII_DEVNAME,
+ .init = bb_mii_init_wrap,
+ .mdio_active = bb_mdio_active_wrap,
+ .mdio_tristate = bb_mdio_tristate_wrap,
+ .set_mdio = bb_set_mdio_wrap,
+ .get_mdio = bb_get_mdio_wrap,
+ .set_mdc = bb_set_mdc_wrap,
+ .delay = bb_delay_wrap,
+ }
+};
+#endif
+
+void bb_miiphy_init(void)
+{
+ int i;
+ for (i = 0; i < sizeof(bbmiibusses)/sizeof(bbmiibusses[0]); i++) {
+#if !defined(CONFIG_RELOC_FIXUP_WORKS)
+ /* Reloate the hooks pointers*/
+ BBMII_RELOATE(bbmiibusses[i].init, gd->reloc_off);
+ BBMII_RELOATE(bbmiibusses[i].mdio_active, gd->reloc_off);
+ BBMII_RELOATE(bbmiibusses[i].mdio_tristate, gd->reloc_off);
+ BBMII_RELOATE(bbmiibusses[i].set_mdio, gd->reloc_off);
+ BBMII_RELOATE(bbmiibusses[i].get_mdio, gd->reloc_off);
+ BBMII_RELOATE(bbmiibusses[i].set_mdc, gd->reloc_off);
+ BBMII_RELOATE(bbmiibusses[i].delay, gd->reloc_off);
+#endif
+
+ if (bbmiibusses[i].init != NULL) {
+ bbmiibusses[i].init(&bbmiibusses[i]);
+ }
+ }
+}
+
+static inline struct bbmiibus *bb_miiphy_getbus(char *devname)
+{
+#ifdef CONFIG_BITBANGMII_MULTI
+ /* Search the correct bus */
+ for (j = 0; j < sizeof(bbmiibusses)/sizeof(bbmmis[0]); j++) {
+ if (!strcmp(bbmiibusses[i].name, devname)) {
+ return &bbmiibusses[i];
+ }
+ }
+ return NULL;
+#else
+ /* We have just one bitbanging bus */
+ return &bbmiibusses[0];
+#endif
+}
/*****************************************************************************
*
* Utility to send the preamble, address, and register (common to read
* and write).
*/
-static void miiphy_pre (char read, unsigned char addr, unsigned char reg)
+static void miiphy_pre (struct bbmiibus *bus, char read, unsigned char addr, unsigned char reg)
{
int j; /* counter */
-#if !(defined(CONFIG_EP8248) || defined(CONFIG_EP82XXM))
- volatile ioport_t *iop = ioport_addr ((immap_t *) CONFIG_SYS_IMMR, MDIO_PORT);
-#endif
/*
* Send a 32 bit preamble ('1's) with an extra '1' bit for good measure.
@@ -50,67 +172,66 @@ static void miiphy_pre (char read, unsigned char addr, unsigned char reg)
* but it is safer and will be much more robust.
*/
- MDIO_ACTIVE;
- MDIO (1);
+ bus->mdio_active(bus);
+ bus->set_mdio (bus, 1);
for (j = 0; j < 32; j++) {
- MDC (0);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 0);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
}
/* send the start bit (01) and the read opcode (10) or write (10) */
- MDC (0);
- MDIO (0);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
- MDC (0);
- MDIO (1);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
- MDC (0);
- MDIO (read);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
- MDC (0);
- MDIO (!read);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 0);
+ bus->set_mdio (bus, 0);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 0);
+ bus->set_mdio (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 0);
+ bus->set_mdio (bus, read);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 0);
+ bus->set_mdio (bus, !read);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
/* send the PHY address */
for (j = 0; j < 5; j++) {
- MDC (0);
+ bus->set_mdc (bus, 0);
if ((addr & 0x10) == 0) {
- MDIO (0);
+ bus->set_mdio (bus, 0);
} else {
- MDIO (1);
+ bus->set_mdio (bus, 1);
}
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
addr <<= 1;
}
/* send the register address */
for (j = 0; j < 5; j++) {
- MDC (0);
+ bus->set_mdc (bus, 0);
if ((reg & 0x10) == 0) {
- MDIO (0);
+ bus->set_mdio (bus, 0);
} else {
- MDIO (1);
+ bus->set_mdio (bus, 1);
}
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
reg <<= 1;
}
}
-
/*****************************************************************************
*
* Read a MII PHY register.
@@ -122,59 +243,66 @@ int bb_miiphy_read (char *devname, unsigned char addr,
unsigned char reg, unsigned short *value)
{
short rdreg; /* register working value */
+ int v;
int j; /* counter */
-#if !(defined(CONFIG_EP8248) || defined(CONFIG_EP82XXM))
- volatile ioport_t *iop = ioport_addr ((immap_t *) CONFIG_SYS_IMMR, MDIO_PORT);
-#endif
+ struct bbmiibus *bus;
+
+ bus = bb_miiphy_getbus(devname);
+ if (bus == NULL) {
+ /* Bus not found! */
+ return -1;
+ }
if (value == NULL) {
puts("NULL value pointer\n");
return (-1);
}
- miiphy_pre (1, addr, reg);
+ miiphy_pre (bus, 1, addr, reg);
/* tri-state our MDIO I/O pin so we can read */
- MDC (0);
- MDIO_TRISTATE;
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 0);
+ bus->mdio_tristate(bus);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
/* check the turnaround bit: the PHY should be driving it to zero */
- if (MDIO_READ != 0) {
+ bus->get_mdio(bus, &v);
+ if (v != 0) {
/* puts ("PHY didn't drive TA low\n"); */
for (j = 0; j < 32; j++) {
- MDC (0);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 0);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
}
/* There is no PHY, set value to 0xFFFF and return */
*value = 0xFFFF;
return (-1);
}
- MDC (0);
- MIIDELAY;
+ bus->set_mdc (bus, 0);
+ bus->delay(bus);
/* read 16 bits of register data, MSB first */
rdreg = 0;
for (j = 0; j < 16; j++) {
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
rdreg <<= 1;
- rdreg |= MDIO_READ;
- MDC (0);
- MIIDELAY;
+ bus->get_mdio(bus, &v);
+ rdreg |= (v & 0x1);
+ bus->set_mdc (bus, 0);
+ bus->delay(bus);
}
- MDC (1);
- MIIDELAY;
- MDC (0);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 0);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
*value = rdreg;
@@ -196,47 +324,51 @@ int bb_miiphy_read (char *devname, unsigned char addr,
int bb_miiphy_write (char *devname, unsigned char addr,
unsigned char reg, unsigned short value)
{
+ struct bbmiibus *bus;
int j; /* counter */
-#if !(defined(CONFIG_EP8248) || defined(CONFIG_EP82XXM))
- volatile ioport_t *iop = ioport_addr ((immap_t *) CONFIG_SYS_IMMR, MDIO_PORT);
-#endif
- miiphy_pre (0, addr, reg);
+ bus = bb_miiphy_getbus(devname);
+ if (bus == NULL) {
+ /* Bus not found! */
+ return -1;
+ }
+
+ miiphy_pre (bus, 0, addr, reg);
/* send the turnaround (10) */
- MDC (0);
- MDIO (1);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
- MDC (0);
- MDIO (0);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->set_mdc (bus, 0);
+ bus->set_mdio (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
+ bus->set_mdc (bus, 0);
+ bus->set_mdio (bus, 0);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
/* write 16 bits of register data, MSB first */
for (j = 0; j < 16; j++) {
- MDC (0);
+ bus->set_mdc (bus, 0);
if ((value & 0x00008000) == 0) {
- MDIO (0);
+ bus->set_mdio (bus, 0);
} else {
- MDIO (1);
+ bus->set_mdio (bus, 1);
}
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
value <<= 1;
}
/*
* Tri-state the MDIO line.
*/
- MDIO_TRISTATE;
- MDC (0);
- MIIDELAY;
- MDC (1);
- MIIDELAY;
+ bus->mdio_tristate(bus);
+ bus->set_mdc (bus, 0);
+ bus->delay(bus);
+ bus->set_mdc (bus, 1);
+ bus->delay(bus);
return 0;
-}
+}
\ No newline at end of file
diff --git a/include/miiphy.h b/include/miiphy.h
index fa33ec7..478c050 100644
--- a/include/miiphy.h
+++ b/include/miiphy.h
@@ -19,6 +19,8 @@
|
| COPYRIGHT I B M CORPORATION 1999
| LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
+|
+| Additions (C) Copyright 2009 Industrie Dial Face S.p.A.
+----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------+
|
@@ -61,12 +63,32 @@ char *miiphy_get_current_dev (void);
void miiphy_listdev (void);
+#ifdef CONFIG_BITBANGMII
+
#define BB_MII_DEVNAME "bbmii"
+struct bbmiibus {
+ char name[NAMESIZE];
+ int (*init)(struct bbmiibus *bus);
+ int (*mdio_active)(struct bbmiibus *bus);
+ int (*mdio_tristate)(struct bbmiibus *bus);
+ int (*set_mdio)(struct bbmiibus *bus, int v);
+ int (*get_mdio)(struct bbmiibus *bus, int *v);
+ int (*set_mdc)(struct bbmiibus *bus, int v);
+ int (*delay)(struct bbmiibus *bus);
+#ifdef CONFIG_BITBANGMII_MULTI
+ void *priv;
+#endif
+};
+
+extern struct bbmiibus bbmiibusses[];
+
+void bb_miiphy_init (void);
int bb_miiphy_read (char *devname, unsigned char addr,
unsigned char reg, unsigned short *value);
int bb_miiphy_write (char *devname, unsigned char addr,
unsigned char reg, unsigned short value);
+#endif
/* phy seed setup */
#define AUTO 99
--
1.6.3.3
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