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-rw-r--r--doc/README.bitbangMII56
-rw-r--r--drivers/net/phy/miiphybb.c346
-rw-r--r--include/miiphy.h25
3 files changed, 322 insertions, 105 deletions
diff --git a/doc/README.bitbangMII b/doc/README.bitbangMII
new file mode 100644
index 000000000..edd085630
--- /dev/null
+++ b/doc/README.bitbangMII
@@ -0,0 +1,56 @@
+This patch rewrites the miiphybb ( Bit-banged MII bus driver ) in order to
+support an arbitrary number of mii buses. This feature is useful when your
+board uses different mii buses for different phys and all (or a part) of these
+buses are implemented via bit-banging mode.
+
+The driver requires that the following macros should be defined into the board
+configuration file:
+
+CONFIG_BITBANGMII - Enable the miiphybb driver
+CONFIG_BITBANGMII_MULTI - Enable the multi bus support
+
+If the CONFIG_BITBANGMII_MULTI is not defined, the board's config file needs
+to define at least the following macros:
+
+MII_INIT - Generic code to enable the MII bus (optional)
+MDIO_DECLARE - Declaration needed to access to the MDIO pin (optional)
+MDIO_ACTIVE - Activate the MDIO pin as out pin
+MDIO_TRISTATE - Activate the MDIO pin as input/tristate pin
+MDIO_READ - Read the MDIO pin
+MDIO(v) - Write v on the MDIO pin
+MDC_DECLARE - Declaration needed to access to the MDC pin (optional)
+MDC(v) - Write v on the MDC pin
+
+The previous macros make the driver compatible with the previous version
+(that didn't support the multi-bus).
+
+When the CONFIG_BITBANGMII_MULTI is also defined, the board code needs to fill
+the bb_miiphy_buses[] array with a record for each required bus and declare
+the bb_miiphy_buses_num variable with the number of mii buses.
+The record (struct bb_miiphy_bus) has the following fields/callbacks (see
+miiphy.h for details):
+
+char name[] - The symbolic name that must be equal to the MII bus
+ registered name
+int (*init)() - Initialization function called at startup time (just
+ before the Ethernet initialization)
+int (*mdio_active)() - Activate the MDIO pin as output
+int (*mdio_tristate)() - Activate the MDIO pin as input/tristate pin
+int (*set_mdio)() - Write the MDIO pin
+int (*get_mdio)() - Read the MDIO pin
+int (*set_mdc)() - Write the MDC pin
+int (*delay)() - Delay function
+void *priv - Private data used by board specific code
+
+The board code will look like:
+
+struct bb_miiphy_bus bb_miiphy_buses[] = {
+ { .name = "miibus#1", .init = b1_init, .mdio_active = b1_mdio_active, ... },
+ { .name = "miibus#2", .init = b2_init, .mdio_active = b2_mdio_active, ... },
+ ...
+};
+int bb_miiphy_buses_num = sizeof(bb_miiphy_buses) /
+ sizeof(bb_miiphy_buses[0]);
+
+2009 Industrie Dial Face S.p.A.
+ Luigi 'Comio' Mantellini <luigi.mantellini@idf-hit.com>
diff --git a/drivers/net/phy/miiphybb.c b/drivers/net/phy/miiphybb.c
index b77c91746..44c45fa66 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@idf-hit.com>
+ *
* (C) Copyright 2001
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
*
@@ -29,18 +32,144 @@
#include <common.h>
#include <ioports.h>
#include <ppc_asm.tmpl>
+#include <miiphy.h>
+
+#define BB_MII_RELOCATE(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 bb_miiphy_bus *bus)
+{
+#ifdef MII_INIT
+ MII_INIT;
+#endif
+ return 0;
+}
+
+static int bb_mdio_active_wrap(struct bb_miiphy_bus *bus)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ MDIO_ACTIVE;
+ return 0;
+}
+
+static int bb_mdio_tristate_wrap(struct bb_miiphy_bus *bus)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ MDIO_TRISTATE;
+ return 0;
+}
+
+static int bb_set_mdio_wrap(struct bb_miiphy_bus *bus, int v)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ MDIO(v);
+ return 0;
+}
+
+static int bb_get_mdio_wrap(struct bb_miiphy_bus *bus, int *v)
+{
+#ifdef MDIO_DECLARE
+ MDIO_DECLARE;
+#endif
+ *v = MDIO_READ;
+ return 0;
+}
+
+static int bb_set_mdc_wrap(struct bb_miiphy_bus *bus, int v)
+{
+#ifdef MDC_DECLARE
+ MDC_DECLARE;
+#endif
+ MDC(v);
+ return 0;
+}
+
+static int bb_delay_wrap(struct bb_miiphy_bus *bus)
+{
+ MIIDELAY;
+ return 0;
+}
+
+struct bb_miiphy_bus bb_miiphy_buses[] = {
+ {
+ .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,
+ }
+};
+
+int bb_miiphy_buses_num = sizeof(bb_miiphy_buses) /
+ sizeof(bb_miiphy_buses[0]);
+#endif
+
+void bb_miiphy_init(void)
+{
+ int i;
+
+ for (i = 0; i < bb_miiphy_buses_num; i++) {
+#if !defined(CONFIG_RELOC_FIXUP_WORKS)
+ /* Relocate the hook pointers*/
+ BB_MII_RELOCATE(bb_miiphy_buses[i].init, gd->reloc_off);
+ BB_MII_RELOCATE(bb_miiphy_buses[i].mdio_active, gd->reloc_off);
+ BB_MII_RELOCATE(bb_miiphy_buses[i].mdio_tristate, gd->reloc_off);
+ BB_MII_RELOCATE(bb_miiphy_buses[i].set_mdio, gd->reloc_off);
+ BB_MII_RELOCATE(bb_miiphy_buses[i].get_mdio, gd->reloc_off);
+ BB_MII_RELOCATE(bb_miiphy_buses[i].set_mdc, gd->reloc_off);
+ BB_MII_RELOCATE(bb_miiphy_buses[i].delay, gd->reloc_off);
+#endif
+ if (bb_miiphy_buses[i].init != NULL) {
+ bb_miiphy_buses[i].init(&bb_miiphy_buses[i]);
+ }
+ }
+}
+
+static inline struct bb_miiphy_bus *bb_miiphy_getbus(char *devname)
+{
+#ifdef CONFIG_BITBANGMII_MULTI
+ int i;
+
+ /* Search the correct bus */
+ for (i = 0; i < bb_miiphy_buses_num; i++) {
+ if (!strcmp(bb_miiphy_buses[i].name, devname)) {
+ return &bb_miiphy_buses[i];
+ }
+ }
+ return NULL;
+#else
+ /* We have just one bitbanging bus */
+ return &bb_miiphy_buses[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 bb_miiphy_bus *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
+ int j;
/*
* Send a 32 bit preamble ('1's) with an extra '1' bit for good measure.
@@ -50,67 +179,66 @@ 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.
@@ -118,63 +246,69 @@ static void miiphy_pre (char read, unsigned char addr, unsigned char reg)
* Returns:
* 0 on success
*/
-int bb_miiphy_read (char *devname, unsigned char addr,
- unsigned char reg, unsigned short *value)
+int bb_miiphy_read(char *devname, unsigned char addr,
+ unsigned char reg, unsigned short *value)
{
- short rdreg; /* register working value */
- int j; /* counter */
-#if !(defined(CONFIG_EP8248) || defined(CONFIG_EP82XXM))
- volatile ioport_t *iop = ioport_addr ((immap_t *) CONFIG_SYS_IMMR, MDIO_PORT);
-#endif
+ short rdreg; /* register working value */
+ int v;
+ int j; /* counter */
+ struct bb_miiphy_bus *bus;
+
+ bus = bb_miiphy_getbus(devname);
+ if (bus == NULL) {
+ return -1;
+ }
if (value == NULL) {
puts("NULL value pointer\n");
- return (-1);
+ 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);
+ 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;
@@ -194,49 +328,53 @@ int bb_miiphy_read (char *devname, unsigned char addr,
* 0 on success
*/
int bb_miiphy_write (char *devname, unsigned char addr,
- unsigned char reg, unsigned short value)
+ unsigned char reg, unsigned short value)
{
+ struct bb_miiphy_bus *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 fa33ec7f7..536212523 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 +63,33 @@ char *miiphy_get_current_dev (void);
void miiphy_listdev (void);
-#define BB_MII_DEVNAME "bbmii"
+#ifdef CONFIG_BITBANGMII
+
+#define BB_MII_DEVNAME "bb_miiphy"
+
+struct bb_miiphy_bus {
+ char name[NAMESIZE];
+ int (*init)(struct bb_miiphy_bus *bus);
+ int (*mdio_active)(struct bb_miiphy_bus *bus);
+ int (*mdio_tristate)(struct bb_miiphy_bus *bus);
+ int (*set_mdio)(struct bb_miiphy_bus *bus, int v);
+ int (*get_mdio)(struct bb_miiphy_bus *bus, int *v);
+ int (*set_mdc)(struct bb_miiphy_bus *bus, int v);
+ int (*delay)(struct bb_miiphy_bus *bus);
+#ifdef CONFIG_BITBANGMII_MULTI
+ void *priv;
+#endif
+};
+
+extern struct bb_miiphy_bus bb_miiphy_buses[];
+extern int bb_miiphy_buses_num;
+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
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