ip17xx: Keep all state locally

Instead of reading the hardware state every time we want to inspect it or
to modify it, maintain it in struct ip175c_state.

This simplifies the code significantly.

Signed-off-by: Martin Mares <mj@ucw.cz>
Signed-off-by: Patrick Horn <patrick.horn@gmail.com>
SVN-Revision: 21722

diff --git a/target/linux/generic-2.6/files/drivers/net/phy/ip175c.c b/target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
index 3f21d72b6640b2de0f232321cc0344ee2623bec5..58ee675f02a893cd78ca7fd47f76c3ce6b2a1a90 100644 (file)
--- a/target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
+++ b/target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
@@ -101,15 +101,11 @@ struct register_mappings {
        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);
@@ -156,8 +152,6 @@ 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,
@@ -205,8 +199,6 @@ 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,
@@ -255,16 +247,12 @@ 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,
 };
 
 
-static int ip175d_get_flags(struct ip175c_state *state);
-static int ip175d_get_state(struct ip175c_state *state);
 static int ip175d_update_state(struct ip175c_state *state);
 static int ip175d_set_vlan_mode(struct ip175c_state *state);
 static int ip175d_reset(struct ip175c_state *state);
@@ -306,8 +294,6 @@ static const struct register_mappings IP175D = {
 
        .MII_REGISTER_EN = NOTSUPPORTED,
 
-       .get_flags = ip175d_get_flags,
-       .get_state = ip175d_get_state,
        .update_state = ip175d_update_state,
        .set_vlan_mode = ip175d_set_vlan_mode,
        .reset = ip175d_reset,
@@ -471,143 +457,6 @@ static int get_model(struct ip175c_state *state)
 
 /*** Low-level functions for the older models ***/
 
-/** Get only the vlan and router flags on the router **/
-static int ip175c_get_flags(struct ip175c_state *state)
-{
-       int val;
-
-       state->router_mode = 0;
-       state->vlan_enabled = -1; // hack
-       state->num_vlans = 0;
-
-       if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
-               return 0; // not an error if it doesn't support enable vlan.
-       }
-
-       val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
-       if (val < 0) {
-               return val;
-       }
-       if (state->regs->ROUTER_EN_BIT >= 0)
-               state->router_mode = ((val>>state->regs->ROUTER_EN_BIT) & 1);
-
-       if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
-               state->num_vlans = (val >> state->regs->NUMLAN_GROUPS_BIT);
-               state->num_vlans &= (state->regs->NUMLAN_GROUPS_MAX-1);
-               state->num_vlans+=1; // does not include WAN.
-       }
-
-       val = getPhy(state, state->regs->VLAN_CONTROL_REG);
-       if (val < 0) {
-               return 0;
-       }
-       if (state->regs->TAG_VLAN_BIT >= 0)
-               state->vlan_enabled = ((val>>state->regs->TAG_VLAN_BIT) & 1);
-
-       return  0;
-}
-
-/** Get all state variables for VLAN mappings and port-based tagging **/
-static int ip175c_get_state(struct ip175c_state *state)
-{
-       int i, j;
-       int ret;
-
-       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,
-                                 state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
-
-       if (state->vlan_enabled == -1) {
-               // not sure how to get this...
-               state->vlan_enabled = (state->remove_tag || state->add_tag);
-       }
-
-       if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
-               for (j=0; j<MAX_PORTS; j++) {
-                       state->ports[j].shareports = 0; // initialize them in case.
-               }
-               for (j=0; j<state->regs->NUM_PORTS; j++) {
-                       reg addr;
-                       const bitnum *bit_lookup = (j%2==0)?
-                               state->regs->VLAN_LOOKUP_EVEN_BIT:
-                               state->regs->VLAN_LOOKUP_ODD_BIT;
-                       addr = state->regs->VLAN_LOOKUP_REG;
-                       if (state->regs->SIMPLE_VLAN_REGISTERS) {
-                               addr.m += j;
-                       } else {
-                               switch (j) {
-                               case 0:
-                               case 1:
-                                       break;
-                               case 2:
-                               case 3:
-                                       addr.m+=1;
-                                       break;
-                               case 4:
-                                       addr.m+=2;
-                                       break;
-                               case 5:
-                                       addr = state->regs->VLAN_LOOKUP_REG_5;
-                                       break;
-                               }
-                       }
-
-                       if (REG_SUPP(addr)) {
-                               GET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
-                       }
-               }
-       } else {
-               for (j=0; j<MAX_PORTS; j++) {
-                       state->ports[j].shareports = 0xff;
-               }
-       }
-
-       for (i=0; i<MAX_PORTS; i++) {
-               if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
-                       int val = getPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i]);
-                       if (val < 0) {
-                               return val;
-                       }
-                       state->ports[i].pvid = val;
-               } else {
-                       state->ports[i].pvid = 0;
-               }
-       }
-
-       if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
-               for (j=0; j<MAX_VLANS; j++) {
-                       reg addr = state->regs->TAG_VLAN_MASK_REG;
-                       const bitnum *bit_lookup = (j%2==0)?
-                               state->regs->TAG_VLAN_MASK_EVEN_BIT:
-                               state->regs->TAG_VLAN_MASK_ODD_BIT;
-                       if (state->regs->SIMPLE_VLAN_REGISTERS) {
-                               addr.m += j;
-                       } else {
-                               addr.m += j/2;
-                       }
-                       GET_PORT_BITS(state, state->vlans[j].ports, addr, bit_lookup);
-               }
-       } else {
-               for (j=0; j<MAX_VLANS; j++) {
-                       state->vlans[j].ports = 0;
-                       for (i=0; i<state->regs->NUM_PORTS; i++) {
-                               if ((state->ports[i].pvid == j) ||
-                                               (state->ports[i].pvid == 0)) {
-                                       state->vlans[j].ports |= (1<<i);
-                               }
-                       }
-               }
-       }
-
-       return 0;
-}
-
 /** Only set vlan and router flags in the switch **/
 static int ip175c_set_flags(struct ip175c_state *state)
 {
@@ -663,7 +512,6 @@ static int ip175c_set_state(struct ip175c_state *state)
                                state->regs->VLAN_LOOKUP_EVEN_BIT:
                                state->regs->VLAN_LOOKUP_ODD_BIT;
 
-                       // duplicate code -- sorry
                        addr = state->regs->VLAN_LOOKUP_REG;
                        if (state->regs->SIMPLE_VLAN_REGISTERS) {
                                addr.m += j;
@@ -776,23 +624,11 @@ static int ip175c_do_reset(struct ip175c_state *state)
                        return err;
        }
 
-       return 0;
+       return ip175c_update_state(state);
 }
 
 /*** Low-level functions for IP175D ***/
 
-static int ip175d_get_flags(struct ip175c_state *state)
-{
-       // We keep the configuration of the switch cached, so get doesn't do anything
-       return 0;
-}
-
-static int ip175d_get_state(struct ip175c_state *state)
-{
-       // Again, the configuration is fully cached
-       return 0;
-}
-
 static int ip175d_update_state(struct ip175c_state *state)
 {
        unsigned int filter_mask = 0;
@@ -898,11 +734,7 @@ static int ip175d_reset(struct ip175c_state *state)
 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 = state->regs->get_state(state); // May be set in get_state.
-       if (err < 0)
-               return err;
        val->value.i = state->vlan_enabled;
        return 0;
 }
@@ -924,14 +756,9 @@ static void ip175c_reset_vlan_config(struct ip175c_state *state)
 static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
 {
        struct ip175c_state *state = dev->priv;
-       int err;
        int enable;
 
-       err = state->regs->get_state(state);
-       if (err < 0)
-               return err;
        enable = val->value.i;
-
        if (state->vlan_enabled == enable) {
                // Do not change any state.
                return 0;
@@ -947,7 +774,6 @@ static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_at
 static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
 {
        struct ip175c_state *state = dev->priv;
-       int err;
        int b;
        int ind;
        unsigned int ports;
@@ -955,10 +781,6 @@ 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 = state->regs->get_state(state);
-       if (err<0)
-               return err;
-
        ports = state->vlans[val->port_vlan].ports;
        b = 0;
        ind = 0;
@@ -981,15 +803,10 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
 {
        struct ip175c_state *state = dev->priv;
        int i;
-       int err;
 
        if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
                return -EINVAL;
 
-       err = state->regs->get_state(state);
-       if (err < 0)
-               return err;
-
        state->vlans[val->port_vlan].ports = 0;
        for (i = 0; i < val->len; i++) {
                unsigned int bitmask = (1<<val->value.ports[i].id);
@@ -1009,11 +826,6 @@ static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
 static int ip175c_apply(struct switch_dev *dev)
 {
        struct ip175c_state *state = dev->priv;
-       int err;
-
-       err = state->regs->get_flags(state);
-       if (err < 0)
-               return err;
 
        if (REG_SUPP(state->regs->MII_REGISTER_EN)) {
                int val = getPhy(state, state->regs->MII_REGISTER_EN);
@@ -1031,10 +843,6 @@ static int ip175c_reset(struct switch_dev *dev)
        struct ip175c_state *state = dev->priv;
        int i, err;
 
-       err = state->regs->get_flags(state);
-       if (err < 0)
-               return err;
-
        if (REG_SUPP(state->regs->RESET_REG)) {
                err = setPhy(state, state->regs->RESET_REG, state->regs->RESET_VAL);
                if (err < 0)
@@ -1056,6 +864,8 @@ static int ip175c_reset(struct switch_dev *dev)
                        return err;
        }
 
+       state->router_mode = 0;
+       state->vlan_enabled = 0;
        ip175c_reset_vlan_config(state);
 
        return state->regs->reset(state);
@@ -1064,11 +874,6 @@ static int ip175c_reset(struct switch_dev *dev)
 static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
 {
        struct ip175c_state *state = dev->priv;
-       int err;
-
-       err = state->regs->get_state(state);
-       if (err < 0)
-               return err;
 
        if (state->add_tag & (1<<val->port_vlan)) {
                if (state->remove_tag & (1<<val->port_vlan))
@@ -1087,11 +892,6 @@ static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *a
 static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
 {
        struct ip175c_state *state = dev->priv;
-       int err;
-
-       err = state->regs->get_state(state);
-       if (err < 0)
-               return err;
 
        state->add_tag &= ~(1<<val->port_vlan);
        state->remove_tag &= ~(1<<val->port_vlan);
@@ -1331,17 +1131,11 @@ 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;
 
        if (val < 0 || val >= MAX_VLANS)
                return -EINVAL;
 
-       err = state->regs->get_state(state);
-       if (err < 0)
-               return err;
-
        state->ports[port].pvid = val;
-
        return state->regs->update_state(state);
 }