#include <linux/phy.h>
#include <linux/delay.h>
#include <linux/switch.h>
+#include <linux/device.h>
#define MAX_VLANS 16
#define MAX_PORTS 9
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);
.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,
.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,
.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_update_state(struct ip175c_state *state);
+static int ip175d_set_vlan_mode(struct ip175c_state *state);
+static int ip175d_reset(struct ip175c_state *state);
+
+static const struct register_mappings IP175D = {
+ .NAME = "IP175D",
+ .MODEL_NO = 0x18,
+
+ // The IP175D has a completely different interface, so we leave most
+ // of the registers undefined and switch to different code paths.
+
+ .VLAN_DEFAULT_TAG_REG = {
+ NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,
+ NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,
+ },
+
+ .ADD_TAG_REG = NOTSUPPORTED,
+ .REMOVE_TAG_REG = NOTSUPPORTED,
+
+ .SIMPLE_VLAN_REGISTERS = 0,
+
+ .VLAN_LOOKUP_REG = NOTSUPPORTED,
+ .VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
+ .TAG_VLAN_MASK_REG = NOTSUPPORTED,
+
+ .RESET_VAL = 0x175D,
+ .RESET_REG = {20,2},
+ .MODE_REG = NOTSUPPORTED,
+
+ .ROUTER_CONTROL_REG = NOTSUPPORTED,
+ .ROUTER_EN_BIT = -1,
+ .NUMLAN_GROUPS_BIT = -1,
+
+ .VLAN_CONTROL_REG = NOTSUPPORTED,
+ .TAG_VLAN_BIT = -1,
+
+ .NUM_PORTS = 6,
+ .CPU_PORT = 5,
+
+ .MII_REGISTER_EN = NOTSUPPORTED,
+
+ .update_state = ip175d_update_state,
+ .set_vlan_mode = ip175d_set_vlan_mode,
+ .reset = ip175d_reset,
+};
+
struct ip175c_state {
struct switch_dev dev;
struct mii_bus *mii_bus;
int num_vlans;
struct vlan_state {
unsigned int ports;
+ unsigned int tag; // VLAN tag (IP175D only)
} vlans[MAX_VLANS];
const struct register_mappings *regs;
reg proc_mii; // phy/reg for the low level register access via swconfig
static int get_model(struct ip175c_state *state)
{
- reg oui_id_reg = {0, 2};
- int oui_id;
- reg model_no_reg = {0, 3};
- int model_no, model_no_orig;
-
- // 175 and 178 have the same oui ID.
- reg oui_id_reg_178c = {5, 2}; // returns error on IP175C.
- int is_178c = 0;
-
- oui_id = getPhy(state, oui_id_reg);
- if (oui_id != 0x0243) {
- // non
- return -ENODEV; // Not a IC+ chip.
- }
- oui_id = getPhy(state, oui_id_reg_178c);
- if (oui_id == 0x0243) {
- is_178c = 1;
- }
+ int id1, id2;
+ int oui_id, model_no, rev_no, chip_no;
+
+ id1 = ip_phy_read(state, 0, 2);
+ id2 = ip_phy_read(state, 0, 3);
+ oui_id = (id1 << 6) | ((id2 >> 10) & 0x3f);
+ model_no = (id2 >> 4) & 0x3f;
+ rev_no = id2 & 0xf;
+ pr_debug("IP175C: Identified oui=%06x model=%02x rev=%X\n", oui_id, model_no, rev_no);
- model_no_orig = getPhy(state, model_no_reg);
- if (model_no_orig < 0) {
+ if (oui_id != 0x0090c3) // No other oui_id should have reached us anyway
return -ENODEV;
- }
- model_no = model_no_orig >> 4; // shift out revision number.
- model_no &= 0x3f; // only take the model number (low 6 bits).
+
if (model_no == IP175A.MODEL_NO) {
state->regs = &IP175A;
} else if (model_no == IP175C.MODEL_NO) {
- if (is_178c) {
+ /*
+ * Several models share the same model_no:
+ * 178C has more PHYs, so we try whether the device responds to a read from PHY5
+ * 175D has a new chip ID register
+ * 175C has neither
+ */
+ if (ip_phy_read(state, 5, 2) == 0x0243) {
state->regs = &IP178C;
} else {
- state->regs = &IP175C;
- }
- } else {
- printk(KERN_WARNING "ip175c: Found an unknown IC+ switch with model number %02Xh.\n", model_no_orig);
- return -EPERM;
- }
- return 0;
-}
-
-/** 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;
+ chip_no = ip_phy_read(state, 20, 0);
+ pr_debug("IP175C: Chip ID register reads %04x\n", chip_no);
+ if (chip_no == 0x175d) {
+ state->regs = &IP175D;
} else {
- addr.m += j/2;
+ state->regs = &IP175C;
}
- 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);
- }
- }
- }
+ pr_warning("IP175C: Found an unknown IC+ switch with model number %02x, revision %X.\n", model_no, rev_no);
+ return -EPERM;
}
-
return 0;
}
+/*** Low-level functions for the older models ***/
+
/** Only set vlan and router flags in the switch **/
static int ip175c_set_flags(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;
state->ports[i].shareports |= state->vlans[j].ports;
}
}
- state->remove_tag = ((~state->add_tag) & ((1<<state->regs->NUM_PORTS)-1));
}
static int ip175c_update_state(struct ip175c_state *state)
return err;
}
- return 0;
+ return ip175c_update_state(state);
}
+/*** Low-level functions for IP175D ***/
+
+static int ip175d_update_state(struct ip175c_state *state)
+{
+ unsigned int filter_mask = 0;
+ unsigned int ports[16], add[16], rem[16];
+ int i, j;
+ int err = 0;
+
+ for (i = 0; i < 16; i++) {
+ ports[i] = 0;
+ add[i] = 0;
+ rem[i] = 0;
+ if (!state->vlan_enabled) {
+ err |= ip_phy_write(state, 22, 14+i, i+1); // default tags
+ ports[i] = 0x3f;
+ continue;
+ }
+ if (!state->vlans[i].tag) {
+ // Reset the filter
+ err |= ip_phy_write(state, 22, 14+i, 0); // tag
+ continue;
+ }
+ filter_mask |= 1 << i;
+ err |= ip_phy_write(state, 22, 14+i, state->vlans[i].tag);
+ ports[i] = state->vlans[i].ports;
+ for (j = 0; j < 6; j++) {
+ if (ports[i] & (1 << j)) {
+ if (state->add_tag & (1 << j))
+ add[i] |= 1 << j;
+ if (state->remove_tag & (1 << j))
+ rem[i] |= 1 << j;
+ }
+ }
+ }
+
+ // Port masks, tag adds and removals
+ for (i = 0; i < 8; i++) {
+ err |= ip_phy_write(state, 23, i, ports[2*i] | (ports[2*i+1] << 8));
+ err |= ip_phy_write(state, 23, 8+i, add[2*i] | (add[2*i+1] << 8));
+ err |= ip_phy_write(state, 23, 16+i, rem[2*i] | (rem[2*i+1] << 8));
+ }
+ err |= ip_phy_write(state, 22, 10, filter_mask);
+
+ // Default VLAN tag for each port
+ for (i = 0; i < 6; i++)
+ err |= ip_phy_write(state, 22, 4+i, state->vlans[state->ports[i].pvid].tag);
+
+ return (err ? -EIO : 0);
+}
+
+static int ip175d_set_vlan_mode(struct ip175c_state *state)
+{
+ int i;
+ int err = 0;
+
+ if (state->vlan_enabled) {
+ // VLAN classification rules: tag-based VLANs, use VID to classify,
+ // drop packets that cannot be classified.
+ err |= ip_phy_write_masked(state, 22, 0, 0x3fff, 0x003f);
+
+ // Ingress rules: CFI=1 dropped, null VID is untagged, VID=1 passed,
+ // VID=0xfff discarded, admin both tagged and untagged, ingress
+ // filters enabled.
+ err |= ip_phy_write_masked(state, 22, 1, 0x0fff, 0x0c3f);
+
+ // Egress rules: IGMP processing off, keep VLAN header off
+ err |= ip_phy_write_masked(state, 22, 2, 0x0fff, 0x0000);
+ } else {
+ // VLAN classification rules: everything off & clear table
+ err |= ip_phy_write_masked(state, 22, 0, 0xbfff, 0x8000);
+
+ // Ingress and egress rules: set to defaults
+ err |= ip_phy_write_masked(state, 22, 1, 0x0fff, 0x0c3f);
+ err |= ip_phy_write_masked(state, 22, 2, 0x0fff, 0x0000);
+ }
+
+ // Reset default VLAN for each port to 0
+ for (i = 0; i < 6; i++)
+ state->ports[i].pvid = 0;
+
+ err |= ip175d_update_state(state);
+
+ return (err ? -EIO : 0);
+}
+
+static int ip175d_reset(struct ip175c_state *state)
+{
+ int err = 0;
+
+ // Disable the special tagging mode
+ err |= ip_phy_write_masked(state, 21, 22, 0x0003, 0x0000);
+
+ // Set 802.1q protocol type
+ err |= ip_phy_write(state, 22, 3, 0x8100);
+
+ state->vlan_enabled = 0;
+ err |= ip175d_set_vlan_mode(state);
+
+ return (err ? -EIO : 0);
+}
+
+/*** High-level functions ***/
+
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;
}
{
int i;
- state->remove_tag = 0x0000;
+ state->remove_tag = (state->vlan_enabled ? ((1<<state->regs->NUM_PORTS)-1) : 0x0000);
state->add_tag = 0x0000;
- for (i = 0; i < MAX_VLANS; i++)
+ for (i = 0; i < MAX_VLANS; i++) {
state->vlans[i].ports = 0x0000;
+ state->vlans[i].tag = (i ? i : 16);
+ }
for (i = 0; i < MAX_PORTS; i++)
state->ports[i].pvid = 0;
}
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;
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;
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;
{
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++) {
- int bitmask = (1<<val->value.ports[i].id);
+ unsigned int bitmask = (1<<val->value.ports[i].id);
state->vlans[val->port_vlan].ports |= bitmask;
if (val->value.ports[i].flags & (1<<SWITCH_PORT_FLAG_TAGGED)) {
state->add_tag |= bitmask;
+ state->remove_tag &= (~bitmask);
} else {
state->add_tag &= (~bitmask);
+ state->remove_tag |= bitmask;
}
}
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);
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)
return err;
}
+ state->router_mode = 0;
+ state->vlan_enabled = 0;
ip175c_reset_vlan_config(state);
return state->regs->reset(state);
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))
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);
return 0;
}
+static int ip175c_get_tag(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
+{
+ struct ip175c_state *state = dev->priv;
+ int vlan = val->port_vlan;
+
+ if (vlan < 0 || vlan >= MAX_VLANS)
+ return -EINVAL;
+
+ val->value.i = state->vlans[vlan].tag;
+ return 0;
+}
+
+static int ip175c_set_tag(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
+{
+ struct ip175c_state *state = dev->priv;
+ int vlan = val->port_vlan;
+ int tag = val->value.i;
+
+ if (vlan < 0 || vlan >= MAX_VLANS)
+ return -EINVAL;
+
+ if (tag < 0 || tag > 4095)
+ return -EINVAL;
+
+ state->vlans[vlan].tag = tag;
+ return state->regs->update_state(state);
+}
+
static int ip175c_set_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
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);
}
IP175C_REGISTER_ERRNO,
};
+enum Vlans {
+ IP175C_VLAN_TAG,
+};
+
static const struct switch_attr ip175c_global[] = {
[IP175C_ENABLE_VLAN] = {
.id = IP175C_ENABLE_VLAN,
};
static const struct switch_attr ip175c_vlan[] = {
+ [IP175C_VLAN_TAG] = {
+ .id = IP175C_VLAN_TAG,
+ .type = SWITCH_TYPE_INT,
+ .description = "VLAN tag (0-4095) [IP175D only]",
+ .name = "tag",
+ .get = ip175c_get_tag,
+ .set = ip175c_set_tag,
+ }
};
static const struct switch_attr ip175c_port[] = {
dev->ports = state->regs->NUM_PORTS;
dev->name = state->regs->NAME;
+ pr_info("IP175C: Found %s at %s\n", dev->name, dev_name(&pdev->dev));
return 0;
error:
ip175c_reset(&state->dev);
state->registered = true;
+
+ pdev->state = PHY_RUNNING;
+ pdev->speed = SPEED_100;
+ pdev->duplex = DUPLEX_FULL;
+ pdev->pause = pdev->asym_pause = 0;
netif_carrier_on(pdev->attached_dev);
return 0;
static int ip175c_read_status(struct phy_device *pdev)
{
- pdev->speed = SPEED_100;
- pdev->duplex = DUPLEX_FULL;
- pdev->pause = pdev->asym_pause = 0;
return 0;
}
static struct phy_driver ip175c_driver = {
.name = "IC+ IP175C",
- .phy_id = 0x02430d80,
- .phy_id_mask = 0x0ffffff0,
+ .phy_id = 0x02430c00,
+ .phy_id_mask = 0x0ffffc00,
.features = PHY_BASIC_FEATURES,
.probe = ip175c_probe,
.remove = ip175c_remove,
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