* 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.
+ * all copies or substantial busions 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,
*
* Authors: Ben Skeggs
*/
-#include "priv.h"
+#include "bus.h"
#ifdef CONFIG_NOUVEAU_I2C_INTERNAL
#define T_TIMEOUT 2200000
#define T_HOLD 5000
static inline void
-i2c_drive_scl(struct nvkm_i2c_port *port, int state)
+nvkm_i2c_drive_scl(struct nvkm_i2c_bus *bus, int state)
{
- port->func->drive_scl(port, state);
+ bus->func->drive_scl(bus, state);
}
static inline void
-i2c_drive_sda(struct nvkm_i2c_port *port, int state)
+nvkm_i2c_drive_sda(struct nvkm_i2c_bus *bus, int state)
{
- port->func->drive_sda(port, state);
+ bus->func->drive_sda(bus, state);
}
static inline int
-i2c_sense_scl(struct nvkm_i2c_port *port)
+nvkm_i2c_sense_scl(struct nvkm_i2c_bus *bus)
{
- return port->func->sense_scl(port);
+ return bus->func->sense_scl(bus);
}
static inline int
-i2c_sense_sda(struct nvkm_i2c_port *port)
+nvkm_i2c_sense_sda(struct nvkm_i2c_bus *bus)
{
- return port->func->sense_sda(port);
+ return bus->func->sense_sda(bus);
}
static void
-i2c_delay(struct nvkm_i2c_port *port, u32 nsec)
+nvkm_i2c_delay(struct nvkm_i2c_bus *bus, u32 nsec)
{
udelay((nsec + 500) / 1000);
}
static bool
-i2c_raise_scl(struct nvkm_i2c_port *port)
+nvkm_i2c_raise_scl(struct nvkm_i2c_bus *bus)
{
u32 timeout = T_TIMEOUT / T_RISEFALL;
- i2c_drive_scl(port, 1);
+ nvkm_i2c_drive_scl(bus, 1);
do {
- i2c_delay(port, T_RISEFALL);
- } while (!i2c_sense_scl(port) && --timeout);
+ nvkm_i2c_delay(bus, T_RISEFALL);
+ } while (!nvkm_i2c_sense_scl(bus) && --timeout);
return timeout != 0;
}
static int
-i2c_start(struct nvkm_i2c_port *port)
+i2c_start(struct nvkm_i2c_bus *bus)
{
int ret = 0;
- if (!i2c_sense_scl(port) ||
- !i2c_sense_sda(port)) {
- i2c_drive_scl(port, 0);
- i2c_drive_sda(port, 1);
- if (!i2c_raise_scl(port))
+ if (!nvkm_i2c_sense_scl(bus) ||
+ !nvkm_i2c_sense_sda(bus)) {
+ nvkm_i2c_drive_scl(bus, 0);
+ nvkm_i2c_drive_sda(bus, 1);
+ if (!nvkm_i2c_raise_scl(bus))
ret = -EBUSY;
}
- i2c_drive_sda(port, 0);
- i2c_delay(port, T_HOLD);
- i2c_drive_scl(port, 0);
- i2c_delay(port, T_HOLD);
+ nvkm_i2c_drive_sda(bus, 0);
+ nvkm_i2c_delay(bus, T_HOLD);
+ nvkm_i2c_drive_scl(bus, 0);
+ nvkm_i2c_delay(bus, T_HOLD);
return ret;
}
static void
-i2c_stop(struct nvkm_i2c_port *port)
+i2c_stop(struct nvkm_i2c_bus *bus)
{
- i2c_drive_scl(port, 0);
- i2c_drive_sda(port, 0);
- i2c_delay(port, T_RISEFALL);
-
- i2c_drive_scl(port, 1);
- i2c_delay(port, T_HOLD);
- i2c_drive_sda(port, 1);
- i2c_delay(port, T_HOLD);
+ nvkm_i2c_drive_scl(bus, 0);
+ nvkm_i2c_drive_sda(bus, 0);
+ nvkm_i2c_delay(bus, T_RISEFALL);
+
+ nvkm_i2c_drive_scl(bus, 1);
+ nvkm_i2c_delay(bus, T_HOLD);
+ nvkm_i2c_drive_sda(bus, 1);
+ nvkm_i2c_delay(bus, T_HOLD);
}
static int
-i2c_bitw(struct nvkm_i2c_port *port, int sda)
+i2c_bitw(struct nvkm_i2c_bus *bus, int sda)
{
- i2c_drive_sda(port, sda);
- i2c_delay(port, T_RISEFALL);
+ nvkm_i2c_drive_sda(bus, sda);
+ nvkm_i2c_delay(bus, T_RISEFALL);
- if (!i2c_raise_scl(port))
+ if (!nvkm_i2c_raise_scl(bus))
return -ETIMEDOUT;
- i2c_delay(port, T_HOLD);
+ nvkm_i2c_delay(bus, T_HOLD);
- i2c_drive_scl(port, 0);
- i2c_delay(port, T_HOLD);
+ nvkm_i2c_drive_scl(bus, 0);
+ nvkm_i2c_delay(bus, T_HOLD);
return 0;
}
static int
-i2c_bitr(struct nvkm_i2c_port *port)
+i2c_bitr(struct nvkm_i2c_bus *bus)
{
int sda;
- i2c_drive_sda(port, 1);
- i2c_delay(port, T_RISEFALL);
+ nvkm_i2c_drive_sda(bus, 1);
+ nvkm_i2c_delay(bus, T_RISEFALL);
- if (!i2c_raise_scl(port))
+ if (!nvkm_i2c_raise_scl(bus))
return -ETIMEDOUT;
- i2c_delay(port, T_HOLD);
+ nvkm_i2c_delay(bus, T_HOLD);
- sda = i2c_sense_sda(port);
+ sda = nvkm_i2c_sense_sda(bus);
- i2c_drive_scl(port, 0);
- i2c_delay(port, T_HOLD);
+ nvkm_i2c_drive_scl(bus, 0);
+ nvkm_i2c_delay(bus, T_HOLD);
return sda;
}
static int
-i2c_get_byte(struct nvkm_i2c_port *port, u8 *byte, bool last)
+nvkm_i2c_get_byte(struct nvkm_i2c_bus *bus, u8 *byte, bool last)
{
int i, bit;
*byte = 0;
for (i = 7; i >= 0; i--) {
- bit = i2c_bitr(port);
+ bit = i2c_bitr(bus);
if (bit < 0)
return bit;
*byte |= bit << i;
}
- return i2c_bitw(port, last ? 1 : 0);
+ return i2c_bitw(bus, last ? 1 : 0);
}
static int
-i2c_put_byte(struct nvkm_i2c_port *port, u8 byte)
+nvkm_i2c_put_byte(struct nvkm_i2c_bus *bus, u8 byte)
{
int i, ret;
for (i = 7; i >= 0; i--) {
- ret = i2c_bitw(port, !!(byte & (1 << i)));
+ ret = i2c_bitw(bus, !!(byte & (1 << i)));
if (ret < 0)
return ret;
}
- ret = i2c_bitr(port);
+ ret = i2c_bitr(bus);
if (ret == 1) /* nack */
ret = -EIO;
return ret;
}
static int
-i2c_addr(struct nvkm_i2c_port *port, struct i2c_msg *msg)
+i2c_addr(struct nvkm_i2c_bus *bus, struct i2c_msg *msg)
{
u32 addr = msg->addr << 1;
if (msg->flags & I2C_M_RD)
addr |= 1;
- return i2c_put_byte(port, addr);
+ return nvkm_i2c_put_byte(bus, addr);
}
-static int
-i2c_bit_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+int
+nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *bus, struct i2c_msg *msgs, int num)
{
- struct nvkm_i2c_port *port = adap->algo_data;
struct i2c_msg *msg = msgs;
int ret = 0, mcnt = num;
- ret = nvkm_i2c(port)->acquire(port, nsecs_to_jiffies(T_TIMEOUT));
- if (ret)
- return ret;
-
while (!ret && mcnt--) {
u8 remaining = msg->len;
u8 *ptr = msg->buf;
- ret = i2c_start(port);
+ ret = i2c_start(bus);
if (ret == 0)
- ret = i2c_addr(port, msg);
+ ret = i2c_addr(bus, msg);
if (msg->flags & I2C_M_RD) {
while (!ret && remaining--)
- ret = i2c_get_byte(port, ptr++, !remaining);
+ ret = nvkm_i2c_get_byte(bus, ptr++, !remaining);
} else {
while (!ret && remaining--)
- ret = i2c_put_byte(port, *ptr++);
+ ret = nvkm_i2c_put_byte(bus, *ptr++);
}
msg++;
}
- i2c_stop(port);
- nvkm_i2c(port)->release(port);
+ i2c_stop(bus);
return (ret < 0) ? ret : num;
}
#else
-static int
-i2c_bit_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+int
+nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *bus, struct i2c_msg *msgs, int num)
{
return -ENODEV;
}
#endif
-
-static u32
-i2c_bit_func(struct i2c_adapter *adap)
-{
- return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
-const struct i2c_algorithm nvkm_i2c_bit_algo = {
- .master_xfer = i2c_bit_xfer,
- .functionality = i2c_bit_func
-};
Code Review / kvmfornfv.git / blobdiff