/*
* Copyright 2013 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs <[email protected]>
*/
#define anx9805_pad(p) container_of((p), struct anx9805_pad, base)
#define anx9805_bus(p) container_of((p), struct anx9805_bus, base)
#define anx9805_aux(p) container_of((p), struct anx9805_aux, base)
#include "aux.h"
#include "bus.h"
struct anx9805_pad {
struct nvkm_i2c_pad base;
struct nvkm_i2c_bus *bus;
u8 addr;
};
struct anx9805_bus {
struct nvkm_i2c_bus base;
struct anx9805_pad *pad;
u8 addr;
};
static int
anx9805_bus_xfer(struct nvkm_i2c_bus *base, struct i2c_msg *msgs, int num)
{
struct anx9805_bus *bus = anx9805_bus(base);
struct anx9805_pad *pad = bus->pad;
struct i2c_adapter *adap = &pad->bus->i2c;
struct i2c_msg *msg = msgs;
int ret = -ETIMEDOUT;
int i, j, cnt = num;
u8 seg = 0x00, off = 0x00, tmp;
tmp = nvkm_rdi2cr(adap, pad->addr, 0x07) & ~0x10;
nvkm_wri2cr(adap, pad->addr, 0x07, tmp | 0x10);
nvkm_wri2cr(adap, pad->addr, 0x07, tmp);
nvkm_wri2cr(adap, bus->addr, 0x43, 0x05);
mdelay(5);
while (cnt--) {
if ( (msg->flags & I2C_M_RD) && msg->addr == 0x50) {
nvkm_wri2cr(adap, bus->addr, 0x40, msg->addr << 1);
nvkm_wri2cr(adap, bus->addr, 0x41, seg);
nvkm_wri2cr(adap, bus->addr, 0x42, off);
nvkm_wri2cr(adap, bus->addr, 0x44, msg->len);
nvkm_wri2cr(adap, bus->addr, 0x45, 0x00);
nvkm_wri2cr(adap, bus->addr, 0x43, 0x01);
for (i = 0; i < msg->len; i++) {
j = 0;
while (nvkm_rdi2cr(adap, bus->addr, 0x46) & 0x10) {
mdelay(5);
if (j++ == 32)
goto done;
}
msg->buf[i] = nvkm_rdi2cr(adap, bus->addr, 0x47);
}
} else
if (!(msg->flags & I2C_M_RD)) {
if (msg->addr == 0x50 && msg->len == 0x01) {
off = msg->buf[0];
} else
if (msg->addr == 0x30 && msg->len == 0x01) {
seg = msg->buf[0];
} else
goto done;
} else {
goto done;
}
msg++;
}
ret = num;
done:
nvkm_wri2cr(adap, bus->addr, 0x43, 0x00);
return ret;
}
static const struct nvkm_i2c_bus_func
anx9805_bus_func = {
.xfer = anx9805_bus_xfer,
};
static int
anx9805_bus_new(struct nvkm_i2c_pad *base, int id, u8 drive,
struct nvkm_i2c_bus **pbus)
{
struct anx9805_pad *pad = anx9805_pad(base);
struct anx9805_bus *bus;
int ret;
if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL)))
return -ENOMEM;
*pbus = &bus->base;
bus->pad = pad;
ret = nvkm_i2c_bus_ctor(&anx9805_bus_func, &pad->base, id, &bus->base);
if (ret)
return ret;
switch (pad->addr) {
case 0x39: bus->addr = 0x3d; break;
case 0x3b: bus->addr = 0x3f; break;
default:
return -ENOSYS;
}
return 0;
}
struct anx9805_aux {
struct nvkm_i2c_aux base;
struct anx9805_pad *pad;
u8 addr;
};
static int
anx9805_aux_xfer(struct nvkm_i2c_aux *base, bool retry,
u8 type, u32 addr, u8 *data, u8 *size)
{
struct anx9805_aux *aux = anx9805_aux(base);
struct anx9805_pad *pad = aux->pad;
struct i2c_adapter *adap = &pad->bus->i2c;
int i, ret = -ETIMEDOUT;
u8 buf[16] = {};
u8 tmp;
AUX_DBG(&aux->base, "%02x %05x %d", type, addr, *size);
tmp = nvkm_rdi2cr(adap, pad->addr, 0x07) & ~0x04;
nvkm_wri2cr(adap, pad->addr, 0x07, tmp | 0x04);
nvkm_wri2cr(adap, pad->addr, 0x07, tmp);
nvkm_wri2cr(adap, pad->addr, 0xf7, 0x01);
nvkm_wri2cr(adap, aux->addr, 0xe4, 0x80);
if (!(type & 1)) {
memcpy(buf, data, *size);
AUX_DBG(&aux->base, "%16ph", buf);
for (i = 0; i < *size; i++)
nvkm_wri2cr(adap, aux->addr, 0xf0 + i, buf[i]);
}
nvkm_wri2cr(adap, aux->addr, 0xe5, ((*size - 1) << 4) | type);
nvkm_wri2cr(adap, aux->addr, 0xe6, (addr & 0x000ff) >> 0);
nvkm_wri2cr(adap, aux->addr, 0xe7, (addr & 0x0ff00) >> 8);
nvkm_wri2cr(adap, aux->addr, 0xe8, (addr & 0xf0000) >> 16);
nvkm_wri2cr(adap, aux->addr, 0xe9, 0x01);
i = 0;
while ((tmp = nvkm_rdi2cr(adap, aux->addr, 0xe9)) & 0x01) {
mdelay(5);
if (i++ == 32)
goto done;
}
if ((tmp = nvkm_rdi2cr(adap, pad->addr, 0xf7)) & 0x01) {
ret = -EIO;
goto done;
}
if (type & 1) {
for (i = 0; i < *size; i++)
buf[i] = nvkm_rdi2cr(adap, aux->addr, 0xf0 + i);
AUX_DBG(&aux->base, "%16ph", buf);
memcpy(data, buf, *size);
}
ret = 0;
done:
nvkm_wri2cr(adap, pad->addr, 0xf7, 0x01);
return ret;
}
static int
anx9805_aux_lnk_ctl(struct nvkm_i2c_aux *base,
int link_nr, int link_bw, bool enh)
{
struct anx9805_aux *aux = anx9805_aux(base);
struct anx9805_pad *pad = aux->pad;
struct i2c_adapter *adap = &pad->bus->i2c;
u8 tmp, i;
AUX_DBG(&aux->base, "ANX9805 train %d %02x %d",
link_nr, link_bw, enh);
nvkm_wri2cr(adap, aux->addr, 0xa0, link_bw);
nvkm_wri2cr(adap, aux->addr, 0xa1, link_nr | (enh ? 0x80 : 0x00));
nvkm_wri2cr(adap, aux->addr, 0xa2, 0x01);
nvkm_wri2cr(adap, aux->addr, 0xa8, 0x01);
i = 0;
while ((tmp = nvkm_rdi2cr(adap, aux->addr, 0xa8)) & 0x01) {
mdelay(5);
if (i++ == 100) {
AUX_ERR(&aux->base, "link training timeout");
return -ETIMEDOUT;
}
}
if (tmp & 0x70) {
AUX_ERR(&aux->base, "link training failed");
return -EIO;
}
return 0;
}
static const struct nvkm_i2c_aux_func
anx9805_aux_func = {
.xfer = anx9805_aux_xfer,
.lnk_ctl = anx9805_aux_lnk_ctl,
};
static int
anx9805_aux_new(struct nvkm_i2c_pad *base, int id, u8 drive,
struct nvkm_i2c_aux **pbus)
{
struct anx9805_pad *pad = anx9805_pad(base);
struct anx9805_aux *aux;
int ret;
if (!(aux = kzalloc(sizeof(*aux), GFP_KERNEL)))
return -ENOMEM;
*pbus = &aux->base;
aux->pad = pad;
ret = nvkm_i2c_aux_ctor(&anx9805_aux_func, &pad->base, id, &aux->base);
if (ret)
return ret;
switch (pad->addr) {
case 0x39: aux->addr = 0x38; break;
case 0x3b: aux->addr = 0x3c; break;
default:
return -ENOSYS;
}
return 0;
}
static const struct nvkm_i2c_pad_func
anx9805_pad_func = {
.bus_new_4 = anx9805_bus_new,
.aux_new_6 = anx9805_aux_new,
};
int
anx9805_pad_new(struct nvkm_i2c_bus *bus, int id, u8 addr,
struct nvkm_i2c_pad **ppad)
{
struct anx9805_pad *pad;
if (!(pad = kzalloc(sizeof(*pad), GFP_KERNEL)))
return -ENOMEM;
*ppad = &pad->base;
nvkm_i2c_pad_ctor(&anx9805_pad_func, bus->pad->i2c, id, &pad->base);
pad->bus = bus;
pad->addr = addr;
return 0;
}
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