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ip17xx: New chip detection

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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>

SVN-Revision: 21719
This commit is contained in:
Gabor Juhos 2010-06-08 20:18:42 +00:00
parent d577cfa397
commit a7301c57a4
1 changed files with 29 additions and 27 deletions
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56
target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
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@ -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;
int id1, id2;
int oui_id, model_no, rev_no, chip_no;
// 175 and 178 have the same oui ID.
reg oui_id_reg_178c = {5, 2}; // returns error on IP175C.
int is_178c = 0;
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);
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;
}
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,