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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>
SVN-Revision: 21714
This commit is contained in:
Gabor Juhos
parent
09be47cf90
commit
065bc60f37
@ -40,6 +40,8 @@ typedef char bitnum;
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#define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1))
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struct ip175c_state;
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/*********** CONSTANTS ***********/
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struct register_mappings {
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char *NAME;
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@ -96,8 +98,21 @@ struct register_mappings {
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// set to 1 for 178C, 0 for 175C.
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bitnum SIMPLE_VLAN_REGISTERS; // 175C has two vlans per register but 178C has only one.
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// Pointers to functions which manipulate hardware state
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int (*get_flags)(struct ip175c_state *state);
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int (*get_state)(struct ip175c_state *state);
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int (*update_state)(struct ip175c_state *state);
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int (*set_vlan_mode)(struct ip175c_state *state);
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int (*reset)(struct ip175c_state *state);
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};
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static int ip175c_get_flags(struct ip175c_state *state);
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static int ip175c_get_state(struct ip175c_state *state);
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static int ip175c_update_state(struct ip175c_state *state);
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static int ip175c_set_vlan_mode(struct ip175c_state *state);
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static int ip175c_do_reset(struct ip175c_state *state);
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static const struct register_mappings IP178C = {
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.NAME = "IP178C",
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.MODEL_NO = 0x18,
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@ -140,6 +155,11 @@ static const struct register_mappings IP178C = {
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.MII_REGISTER_EN = NOTSUPPORTED,
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.get_flags = ip175c_get_flags,
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.get_state = ip175c_get_state,
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.update_state = ip175c_update_state,
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.set_vlan_mode = ip175c_set_vlan_mode,
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.reset = ip175c_do_reset,
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};
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static const struct register_mappings IP175C = {
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@ -184,6 +204,11 @@ static const struct register_mappings IP175C = {
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.MII_REGISTER_EN = NOTSUPPORTED,
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.get_flags = ip175c_get_flags,
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.get_state = ip175c_get_state,
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.update_state = ip175c_update_state,
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.set_vlan_mode = ip175c_set_vlan_mode,
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.reset = ip175c_do_reset,
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};
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static const struct register_mappings IP175A = {
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@ -228,6 +253,12 @@ static const struct register_mappings IP175A = {
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.MII_REGISTER_EN = {0, 18},
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.MII_REGISTER_EN_BIT = 7,
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.get_flags = ip175c_get_flags,
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.get_state = ip175c_get_state,
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.update_state = ip175c_update_state,
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.set_vlan_mode = ip175c_set_vlan_mode,
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.reset = ip175c_do_reset,
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};
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@ -385,7 +416,7 @@ static int get_model(struct ip175c_state *state)
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}
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/** Get only the vlan and router flags on the router **/
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static int get_flags(struct ip175c_state *state)
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static int ip175c_get_flags(struct ip175c_state *state)
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{
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int val;
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@ -421,14 +452,16 @@ static int get_flags(struct ip175c_state *state)
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}
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/** Get all state variables for VLAN mappings and port-based tagging **/
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static int get_state(struct ip175c_state *state)
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static int ip175c_get_state(struct ip175c_state *state)
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{
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int i, j;
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int ret;
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ret = get_flags(state);
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ret = ip175c_get_flags(state);
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if (ret < 0) {
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return ret;
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}
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GET_PORT_BITS(state, state->remove_tag,
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state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
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GET_PORT_BITS(state, state->add_tag,
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@ -519,8 +552,8 @@ static int get_state(struct ip175c_state *state)
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return 0;
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}
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/** Only update vlan and router flags in the switch **/
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static int update_flags(struct ip175c_state *state)
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/** Only set vlan and router flags in the switch **/
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static int ip175c_set_flags(struct ip175c_state *state)
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{
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int val;
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@ -557,8 +590,8 @@ static int update_flags(struct ip175c_state *state)
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return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
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}
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/** Update all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
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static int update_state(struct ip175c_state *state)
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/** Set all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
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static int ip175c_set_state(struct ip175c_state *state)
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{
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int j;
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int i;
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@ -631,14 +664,14 @@ static int update_state(struct ip175c_state *state)
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}
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}
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return update_flags(state);
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return ip175c_set_flags(state);
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}
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/**
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* Uses only the VLAN port mask and the add tag mask to generate the other fields:
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* which ports are part of the same VLAN, removing vlan tags, and VLAN tag ids.
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*/
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static void correct_vlan_state(struct ip175c_state *state)
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static void ip175c_correct_vlan_state(struct ip175c_state *state)
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{
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int i, j;
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state->num_vlans = 0;
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@ -664,12 +697,39 @@ static void correct_vlan_state(struct ip175c_state *state)
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state->remove_tag = ((~state->add_tag) & ((1<<state->regs->NUM_PORTS)-1));
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}
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static int ip175c_update_state(struct ip175c_state *state)
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{
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ip175c_correct_vlan_state(state);
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return ip175c_set_state(state);
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}
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static int ip175c_set_vlan_mode(struct ip175c_state *state)
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{
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return ip175c_update_state(state);
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}
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static int ip175c_do_reset(struct ip175c_state *state)
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{
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int err;
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if (REG_SUPP(state->regs->MODE_REG)) {
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err = setPhy(state, state->regs->MODE_REG, state->regs->MODE_VAL);
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if (err < 0)
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return err;
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err = getPhy(state, state->regs->MODE_REG);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int ip175c_get_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
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{
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struct ip175c_state *state = dev->priv;
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int err;
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err = get_state(state); // May be set in get_state.
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err = state->regs->get_state(state); // May be set in get_state.
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if (err < 0)
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return err;
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val->value.i = state->vlan_enabled;
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@ -683,7 +743,7 @@ static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_at
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int enable;
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int i;
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err = get_state(state);
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err = state->regs->get_state(state);
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if (err < 0)
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return err;
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enable = val->value.i;
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@ -697,19 +757,10 @@ static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_at
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// Otherwise, if we are switching state, set fields to a known default.
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state->remove_tag = 0x0000;
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state->add_tag = 0x0000;
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for (i = 0; i < MAX_PORTS; i++)
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state->ports[i].shareports = 0xffff;
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for (i = 0; i < MAX_VLANS; i++)
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state->vlan_ports[i] = 0x0;
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if (state->vlan_enabled) {
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// Updates other fields only based off vlan_ports and add_tag fields.
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// Note that by default, no ports are in any vlans.
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correct_vlan_state(state);
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}
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// Ensure sane defaults?
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return update_state(state);
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return state->regs->set_vlan_mode(state);
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}
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static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
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@ -723,7 +774,7 @@ static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
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if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
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return -EINVAL;
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err = get_state(state);
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err = state->regs->get_state(state);
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if (err<0)
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return err;
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@ -754,7 +805,7 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
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if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
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return -EINVAL;
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err = get_state(state);
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err = state->regs->get_state(state);
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if (err < 0)
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return err;
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@ -769,10 +820,7 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
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}
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}
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correct_vlan_state(state);
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err = update_state(state);
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return err;
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return state->regs->update_state(state);
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}
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static int ip175c_apply(struct switch_dev *dev)
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@ -780,7 +828,7 @@ static int ip175c_apply(struct switch_dev *dev)
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struct ip175c_state *state = dev->priv;
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int err;
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err = get_flags(state);
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err = state->regs->get_flags(state);
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if (err < 0)
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return err;
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@ -800,7 +848,7 @@ static int ip175c_reset(struct switch_dev *dev)
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struct ip175c_state *state = dev->priv;
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int i, err;
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err = get_flags(state);
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err = state->regs->get_flags(state);
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if (err < 0)
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return err;
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@ -818,13 +866,6 @@ static int ip175c_reset(struct switch_dev *dev)
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mdelay(2);
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}
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if (REG_SUPP(state->regs->MODE_REG)) {
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err = setPhy(state, state->regs->MODE_REG, state->regs->MODE_VAL);
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if (err < 0)
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return err;
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err = getPhy(state, state->regs->MODE_REG);
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}
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/* reset switch ports */
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for (i = 0; i < state->regs->NUM_PORTS-1; i++) {
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err = ip_phy_write(state, i, MII_BMCR, BMCR_RESET);
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@ -832,7 +873,7 @@ static int ip175c_reset(struct switch_dev *dev)
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return err;
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}
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return 0;
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return state->regs->reset(state);
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}
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static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
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@ -840,7 +881,7 @@ static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *a
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struct ip175c_state *state = dev->priv;
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int err;
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err = get_state(state);
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err = state->regs->get_state(state);
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if (err < 0)
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return err;
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@ -863,7 +904,7 @@ static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *a
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struct ip175c_state *state = dev->priv;
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int err;
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err = get_state(state);
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err = state->regs->get_state(state);
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if (err < 0)
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return err;
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@ -875,12 +916,7 @@ static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *a
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if (val->value.i == 1)
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state->add_tag |= (1<<val->port_vlan);
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SET_PORT_BITS(state, state->add_tag,
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state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
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SET_PORT_BITS(state, state->remove_tag,
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state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
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return err;
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return state->regs->update_state(state);
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}
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/** Get the current phy address */
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@ -1082,13 +1118,18 @@ static int ip175c_get_pvid(struct switch_dev *dev, int port, int *val)
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static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
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{
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struct ip175c_state *state = dev->priv;
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int err;
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if (val < 0 || val >= MAX_VLANS)
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return -EINVAL;
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err = state->regs->get_state(state);
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if (err < 0)
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return err;
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state->ports[port].pvid = val;
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if (!REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[port]))
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return 0;
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return setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[port], val);
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return state->regs->update_state(state);
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}
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