ip17xx: New chip detection

Clean up get_model() and make it recognize IP175D using yet another
chip ID register. Log the detected model.

Also fix a bug in the interface between the PHY layer and our probe function,
which caused IP175A devices to be ignored.

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@21719 3c298f89-4303-0410-b956-a3cf2f4a3e73

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 706c973..ede5d51 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
@@ -25,6 +25,7 @@
 #include <linux/phy.h>
 #include <linux/delay.h>
 #include <linux/switch.h>
+#include <linux/device.h>
 
 #define MAX_VLANS 16
 #define MAX_PORTS 9
@@ -378,41 +379,41 @@ static int setPhy(struct ip175c_state *state, reg mii, u16 value)
 
 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;
+                       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 = &IP175C;
+                       } else {
+                               state->regs = &IP175C;
+                       }
                }
        } else {
-               printk(KERN_WARNING "ip175c: Found an unknown IC+ switch with model number %02Xh.\n", model_no_orig);
+               pr_warning("IP175C: Found an unknown IC+ switch with model number %02x, revision %X.\n", model_no, rev_no);
                return -EPERM;
        }
        return 0;
@@ -1321,6 +1322,7 @@ static int ip175c_probe(struct phy_device *pdev)
        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:
@@ -1371,8 +1373,8 @@ static int ip175c_read_status(struct phy_device *pdev)
 
 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,