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ip17xx: Introduce indirection of low-level operations 

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>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21714 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Gabor Juhos 2010-06-08 20:18:20 +00:00
parent ce244e155a
commit 83ae20132e
1 changed files with 90 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

139
target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
View File

@ -40,6 +40,8 @@ typedef char bitnum;
#define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1)) #define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1))
struct ip175c_state;
/*********** CONSTANTS ***********/ /*********** CONSTANTS ***********/
struct register_mappings { struct register_mappings {
char *NAME; char *NAME;
@ -96,8 +98,21 @@ struct register_mappings {
// set to 1 for 178C, 0 for 175C. // set to 1 for 178C, 0 for 175C.
bitnum SIMPLE_VLAN_REGISTERS; // 175C has two vlans per register but 178C has only one. 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 = { static const struct register_mappings IP178C = {
.NAME = "IP178C", .NAME = "IP178C",
.MODEL_NO = 0x18, .MODEL_NO = 0x18,
@ -140,6 +155,11 @@ static const struct register_mappings IP178C = {
.MII_REGISTER_EN = NOTSUPPORTED, .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 = { static const struct register_mappings IP175C = {
@ -184,6 +204,11 @@ static const struct register_mappings IP175C = {
.MII_REGISTER_EN = NOTSUPPORTED, .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 = { static const struct register_mappings IP175A = {
@ -228,6 +253,12 @@ static const struct register_mappings IP175A = {
.MII_REGISTER_EN = {0, 18}, .MII_REGISTER_EN = {0, 18},
.MII_REGISTER_EN_BIT = 7, .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 **/ /** 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; 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 **/ /** 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 i, j;
int ret; int ret;
ret = get_flags(state);
ret = ip175c_get_flags(state);
if (ret < 0) { if (ret < 0) {
return ret; return ret;
} }
GET_PORT_BITS(state, state->remove_tag, GET_PORT_BITS(state, state->remove_tag,
state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT); state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
GET_PORT_BITS(state, state->add_tag, GET_PORT_BITS(state, state->add_tag,
@ -519,8 +552,8 @@ static int get_state(struct ip175c_state *state)
return 0; return 0;
} }
/** Only update vlan and router flags in the switch **/ /** Only set vlan and router flags in the switch **/
static int update_flags(struct ip175c_state *state) static int ip175c_set_flags(struct ip175c_state *state)
{ {
int val; int val;
@ -557,8 +590,8 @@ static int update_flags(struct ip175c_state *state)
return setPhy(state, state->regs->ROUTER_CONTROL_REG, val); return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
} }
/** Update all VLAN and port state. Usually you should call "correct_vlan_state" first. **/ /** Set all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
static int update_state(struct ip175c_state *state) static int ip175c_set_state(struct ip175c_state *state)
{ {
int j; int j;
int i; 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: * 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. * 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; int i, j;
state->num_vlans = 0; 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)); 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) 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; struct ip175c_state *state = dev->priv;
int err; 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) if (err < 0)
return err; return err;
val->value.i = state->vlan_enabled; 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 enable;
int i; int i;
err = get_state(state); err = state->regs->get_state(state);
if (err < 0) if (err < 0)
return err; return err;
enable = val->value.i; 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. // Otherwise, if we are switching state, set fields to a known default.
state->remove_tag = 0x0000; state->remove_tag = 0x0000;
state->add_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++) for (i = 0; i < MAX_VLANS; i++)
state->vlan_ports[i] = 0x0; state->vlan_ports[i] = 0x0;
if (state->vlan_enabled) { return state->regs->set_vlan_mode(state);
// 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);
} }
static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val) 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) if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
return -EINVAL; return -EINVAL;
err = get_state(state); err = state->regs->get_state(state);
if (err<0) if (err<0)
return err; 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) if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
return -EINVAL; return -EINVAL;
err = get_state(state); err = state->regs->get_state(state);
if (err < 0) if (err < 0)
return err; return err;
@ -769,10 +820,7 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
} }
} }
correct_vlan_state(state); return state->regs->update_state(state);
err = update_state(state);
return err;
} }
static int ip175c_apply(struct switch_dev *dev) 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; struct ip175c_state *state = dev->priv;
int err; int err;
err = get_flags(state); err = state->regs->get_flags(state);
if (err < 0) if (err < 0)
return err; return err;
@ -800,7 +848,7 @@ static int ip175c_reset(struct switch_dev *dev)
struct ip175c_state *state = dev->priv; struct ip175c_state *state = dev->priv;
int i, err; int i, err;
err = get_flags(state); err = state->regs->get_flags(state);
if (err < 0) if (err < 0)
return err; return err;
@ -818,13 +866,6 @@ static int ip175c_reset(struct switch_dev *dev)
mdelay(2); 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 */ /* reset switch ports */
for (i = 0; i < state->regs->NUM_PORTS-1; i++) { for (i = 0; i < state->regs->NUM_PORTS-1; i++) {
err = ip_phy_write(state, i, MII_BMCR, BMCR_RESET); 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 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) 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; struct ip175c_state *state = dev->priv;
int err; int err;
err = get_state(state); err = state->regs->get_state(state);
if (err < 0) if (err < 0)
return err; 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; struct ip175c_state *state = dev->priv;
int err; int err;
err = get_state(state); err = state->regs->get_state(state);
if (err < 0) if (err < 0)
return err; 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) if (val->value.i == 1)
state->add_tag |= (1<<val->port_vlan); state->add_tag |= (1<<val->port_vlan);
SET_PORT_BITS(state, state->add_tag, return state->regs->update_state(state);
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;
} }
/** Get the current phy address */ /** 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) static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
{ {
struct ip175c_state *state = dev->priv; struct ip175c_state *state = dev->priv;
int err;
if (val < 0 || val >= MAX_VLANS)
return -EINVAL;
err = state->regs->get_state(state);
if (err < 0)
return err;
state->ports[port].pvid = val; state->ports[port].pvid = val;
if (!REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[port])) return state->regs->update_state(state);
return 0;
return setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[port], val);
} }