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ip17xx: Introduce indirection of low-level operations

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This patch introduces seperation between low-level and high-level parts
of the driver. The low-level functions are now called via pointers stored
in struct ip175c_regs.

The only functional changes are:

  o  correct_vlan_state() is now called as a part of every update_state().

  o  The order of setting of MODE_REG and resetting switch ports
     has changed. (These are independent actions, so it should not matter.)

  o  ip175c_set_tagged() sets the tags via update_state() instead of writing
     directly to the registers.

  o  The same for ip175c_set_pvid().

The only gaps in this abstraction are operations on ports (get_port_speed
and friends), which access PHY registers directly.

Signed-off-by: Martin Mares <mj@ucw.cz>
Signed-off-by: Patrick Horn <patrick.horn@gmail.com>

SVN-Revision: 21714
v19.07.3_mercusys_ac12_duma
Gabor Juhos 14 years ago
parent 09be47cf90
commit 065bc60f37
1 changed files with 90 additions and 49 deletions
Show Stats Download Patch File Download Diff File

139
target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
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@ -40,6 +40,8 @@ typedef char bitnum;
#define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1))
struct ip175c_state;
/*********** CONSTANTS ***********/
struct register_mappings {
char *NAME;
@ -96,8 +98,21 @@ struct register_mappings {
// set to 1 for 178C, 0 for 175C.
bitnum SIMPLE_VLAN_REGISTERS; // 175C has two vlans per register but 178C has only one.
// Pointers to functions which manipulate hardware state
int (*get_flags)(struct ip175c_state *state);
int (*get_state)(struct ip175c_state *state);
int (*update_state)(struct ip175c_state *state);
int (*set_vlan_mode)(struct ip175c_state *state);
int (*reset)(struct ip175c_state *state);
};
static int ip175c_get_flags(struct ip175c_state *state);
static int ip175c_get_state(struct ip175c_state *state);
static int ip175c_update_state(struct ip175c_state *state);
static int ip175c_set_vlan_mode(struct ip175c_state *state);
static int ip175c_do_reset(struct ip175c_state *state);
static const struct register_mappings IP178C = {
.NAME = "IP178C",
.MODEL_NO = 0x18,
@ -140,6 +155,11 @@ static const struct register_mappings IP178C = {
.MII_REGISTER_EN = NOTSUPPORTED,
.get_flags = ip175c_get_flags,
.get_state = ip175c_get_state,
.update_state = ip175c_update_state,
.set_vlan_mode = ip175c_set_vlan_mode,
.reset = ip175c_do_reset,
};
static const struct register_mappings IP175C = {
@ -184,6 +204,11 @@ static const struct register_mappings IP175C = {
.MII_REGISTER_EN = NOTSUPPORTED,
.get_flags = ip175c_get_flags,
.get_state = ip175c_get_state,
.update_state = ip175c_update_state,
.set_vlan_mode = ip175c_set_vlan_mode,
.reset = ip175c_do_reset,
};
static const struct register_mappings IP175A = {
@ -228,6 +253,12 @@ static const struct register_mappings IP175A = {
.MII_REGISTER_EN = {0, 18},
.MII_REGISTER_EN_BIT = 7,
.get_flags = ip175c_get_flags,
.get_state = ip175c_get_state,
.update_state = ip175c_update_state,
.set_vlan_mode = ip175c_set_vlan_mode,
.reset = ip175c_do_reset,
};
@ -385,7 +416,7 @@ static int get_model(struct ip175c_state *state)
}
/** Get only the vlan and router flags on the router **/
static int get_flags(struct ip175c_state *state)
static int ip175c_get_flags(struct ip175c_state *state)
{
int val;
@ -421,14 +452,16 @@ static int get_flags(struct ip175c_state *state)
}
/** Get all state variables for VLAN mappings and port-based tagging **/
static int get_state(struct ip175c_state *state)
static int ip175c_get_state(struct ip175c_state *state)
{
int i, j;
int ret;
ret = get_flags(state);
ret = ip175c_get_flags(state);
if (ret < 0) {
return ret;
}
GET_PORT_BITS(state, state->remove_tag,
state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
GET_PORT_BITS(state, state->add_tag,
@ -519,8 +552,8 @@ static int get_state(struct ip175c_state *state)
return 0;
}
/** Only update vlan and router flags in the switch **/
static int update_flags(struct ip175c_state *state)
/** Only set vlan and router flags in the switch **/
static int ip175c_set_flags(struct ip175c_state *state)
{
int val;
@ -557,8 +590,8 @@ static int update_flags(struct ip175c_state *state)
return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
}
/** Update all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
static int update_state(struct ip175c_state *state)
/** Set all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
static int ip175c_set_state(struct ip175c_state *state)
{
int j;
int i;
@ -631,14 +664,14 @@ static int update_state(struct ip175c_state *state)
}
}
return update_flags(state);
return ip175c_set_flags(state);
}
/**
* Uses only the VLAN port mask and the add tag mask to generate the other fields:
* which ports are part of the same VLAN, removing vlan tags, and VLAN tag ids.
*/
static void correct_vlan_state(struct ip175c_state *state)
static void ip175c_correct_vlan_state(struct ip175c_state *state)
{
int i, j;
state->num_vlans = 0;
@ -664,12 +697,39 @@ static void correct_vlan_state(struct ip175c_state *state)
state->remove_tag = ((~state->add_tag) & ((1<<state->regs->NUM_PORTS)-1));
}
static int ip175c_update_state(struct ip175c_state *state)
{
ip175c_correct_vlan_state(state);
return ip175c_set_state(state);
}
static int ip175c_set_vlan_mode(struct ip175c_state *state)
{
return ip175c_update_state(state);
}
static int ip175c_do_reset(struct ip175c_state *state)
{
int err;
if (REG_SUPP(state->regs->MODE_REG)) {
err = setPhy(state, state->regs->MODE_REG, state->regs->MODE_VAL);
if (err < 0)
return err;
err = getPhy(state, state->regs->MODE_REG);
if (err < 0)
return err;
}
return 0;
}
static int ip175c_get_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int err;
err = get_state(state); // May be set in get_state.
err = state->regs->get_state(state); // May be set in get_state.
if (err < 0)
return err;
val->value.i = state->vlan_enabled;
@ -683,7 +743,7 @@ static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_at
int enable;
int i;
err = get_state(state);
err = state->regs->get_state(state);
if (err < 0)
return err;
enable = val->value.i;
@ -697,19 +757,10 @@ static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_at
// Otherwise, if we are switching state, set fields to a known default.
state->remove_tag = 0x0000;
state->add_tag = 0x0000;
for (i = 0; i < MAX_PORTS; i++)
state->ports[i].shareports = 0xffff;
for (i = 0; i < MAX_VLANS; i++)
state->vlan_ports[i] = 0x0;
if (state->vlan_enabled) {
// Updates other fields only based off vlan_ports and add_tag fields.
// Note that by default, no ports are in any vlans.
correct_vlan_state(state);
}
// Ensure sane defaults?
return update_state(state);
return state->regs->set_vlan_mode(state);
}
static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
@ -723,7 +774,7 @@ static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
return -EINVAL;
err = get_state(state);
err = state->regs->get_state(state);
if (err<0)
return err;
@ -754,7 +805,7 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
return -EINVAL;
err = get_state(state);
err = state->regs->get_state(state);
if (err < 0)
return err;
@ -769,10 +820,7 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
}
}
correct_vlan_state(state);
err = update_state(state);
return err;
return state->regs->update_state(state);
}
static int ip175c_apply(struct switch_dev *dev)
@ -780,7 +828,7 @@ static int ip175c_apply(struct switch_dev *dev)
struct ip175c_state *state = dev->priv;
int err;
err = get_flags(state);
err = state->regs->get_flags(state);
if (err < 0)
return err;
@ -800,7 +848,7 @@ static int ip175c_reset(struct switch_dev *dev)
struct ip175c_state *state = dev->priv;
int i, err;
err = get_flags(state);
err = state->regs->get_flags(state);
if (err < 0)
return err;
@ -818,13 +866,6 @@ static int ip175c_reset(struct switch_dev *dev)
mdelay(2);
}
if (REG_SUPP(state->regs->MODE_REG)) {
err = setPhy(state, state->regs->MODE_REG, state->regs->MODE_VAL);
if (err < 0)
return err;
err = getPhy(state, state->regs->MODE_REG);
}
/* reset switch ports */
for (i = 0; i < state->regs->NUM_PORTS-1; i++) {
err = ip_phy_write(state, i, MII_BMCR, BMCR_RESET);
@ -832,7 +873,7 @@ static int ip175c_reset(struct switch_dev *dev)
return err;
}
return 0;
return state->regs->reset(state);
}
static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
@ -840,7 +881,7 @@ static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *a
struct ip175c_state *state = dev->priv;
int err;
err = get_state(state);
err = state->regs->get_state(state);
if (err < 0)
return err;
@ -863,7 +904,7 @@ static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *a
struct ip175c_state *state = dev->priv;
int err;
err = get_state(state);
err = state->regs->get_state(state);
if (err < 0)
return err;
@ -875,12 +916,7 @@ static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *a
if (val->value.i == 1)
state->add_tag |= (1<<val->port_vlan);
SET_PORT_BITS(state, state->add_tag,
state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
SET_PORT_BITS(state, state->remove_tag,
state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
return err;
return state->regs->update_state(state);
}
/** Get the current phy address */
@ -1082,13 +1118,18 @@ static int ip175c_get_pvid(struct switch_dev *dev, int port, int *val)
static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
{
struct ip175c_state *state = dev->priv;
int err;
state->ports[port].pvid = val;
if (val < 0 || val >= MAX_VLANS)
return -EINVAL;
if (!REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[port]))
return 0;
err = state->regs->get_state(state);
if (err < 0)
return err;
state->ports[port].pvid = val;
return setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[port], val);
return state->regs->update_state(state);
}

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