struct i2c_msg msg = {
.addr = mst->i2c_addr,.flags = 0,.buf = b,.len = 4
};
+
return i2c_transfer(mst->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
}
+static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
+{
+ u8 wb[2] = { reg >> 8, reg & 0xff };
+ u8 rb[2];
+ struct i2c_msg msg[2] = {
+ {.addr = mst->i2c_addr,.flags = 0,.buf = wb,.len = 2},
+ {.addr = mst->i2c_addr,.flags = I2C_M_RD,.buf = rb,.len = 2},
+ };
+
+ if (i2c_transfer(mst->i2c_adap, msg, 2) != 2)
+ dprintk("i2c read error on %d", reg);
+
+ return (rb[0] << 8) | rb[1];
+}
+
+static int dibx000_is_i2c_done(struct dibx000_i2c_master *mst)
+{
+ int i = 100; // max_i2c_polls;
+ u16 status;
+
+ while (((status = dibx000_read_word(mst, mst->base_reg + 2)) & 0x0100) == 0 && --i > 0);
+
+ /* i2c timed out */
+ if (i == 0)
+ return -EREMOTEIO;
+
+ /* no acknowledge */
+ if ((status & 0x0080) == 0)
+ return -EREMOTEIO;
+
+ return 0;
+}
+
+static int dibx000_master_i2c_write(struct dibx000_i2c_master *mst, struct i2c_msg *msg, u8 stop)
+{
+ u16 data;
+ u16 da;
+ u16 i;
+ u16 txlen = msg->len, len;
+ const u8 *b = msg->buf;
+
+ while (txlen) {
+ dibx000_read_word(mst, mst->base_reg + 2); // reset fifo ptr
+
+ len = txlen > 8 ? 8 : txlen;
+ for (i = 0; i < len; i += 2) {
+ data = *b++ << 8;
+ if (i+1 < len)
+ data |= *b++;
+ dibx000_write_word(mst, mst->base_reg, data);
+ }
+ da = (((u8) (msg->addr)) << 9) | // addr
+ (1 << 8) | // master
+ (1 << 7) | // rq
+ (0 << 6) | // stop
+ (0 << 5) | // start
+ ((len & 0x7) << 2) | // nb 8 bytes == 0 here
+ (0 << 1) | // rw
+ (0 << 0); // irqen
+
+ if (txlen == msg->len)
+ da |= 1 << 5; /* start */
+
+ if (txlen-len == 0 && stop)
+ da |= 1 << 6; /* stop */
+
+ dibx000_write_word(mst, mst->base_reg+1, da);
+
+ if (dibx000_is_i2c_done(mst) != 0)
+ return -EREMOTEIO;
+ txlen -= len;
+ }
+
+ return 0;
+}
+
+static int dibx000_master_i2c_read(struct dibx000_i2c_master *mst, struct i2c_msg *msg)
+{
+ u16 da;
+ u8 *b = msg->buf;
+ u16 rxlen = msg->len, len;
+
+ while (rxlen) {
+ len = rxlen > 8 ? 8 : rxlen;
+ da = (((u8) (msg->addr)) << 9) | // addr
+ (1 << 8) | // master
+ (1 << 7) | // rq
+ (0 << 6) | // stop
+ (0 << 5) | // start
+ ((len & 0x7) << 2) | // nb
+ (1 << 1) | // rw
+ (0 << 0); // irqen
+
+ if (rxlen == msg->len)
+ da |= 1 << 5; /* start */
+
+ if (rxlen-len == 0)
+ da |= 1 << 6; /* stop */
+ dibx000_write_word(mst, mst->base_reg+1, da);
+
+ if (dibx000_is_i2c_done(mst) != 0)
+ return -EREMOTEIO;
+
+ rxlen -= len;
+
+ while (len) {
+ da = dibx000_read_word(mst, mst->base_reg);
+ *b++ = (da >> 8) & 0xff;
+ len--;
+ if (len >= 1) {
+ *b++ = da & 0xff;
+ len--;
+ }
+ }
+ }
+
+ return 0;
+}
+
+int dibx000_i2c_set_speed(struct i2c_adapter *i2c_adap, u16 speed)
+{
+ struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+
+ if (mst->device_rev < DIB7000MC && speed < 235)
+ speed = 235;
+ return dibx000_write_word(mst, mst->base_reg + 3, (u16)(60000 / speed));
+
+}
+EXPORT_SYMBOL(dibx000_i2c_set_speed);
+
+static u32 dibx000_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C;
+}
static int dibx000_i2c_select_interface(struct dibx000_i2c_master *mst,
enum dibx000_i2c_interface intf)
return 0;
}
+static int dibx000_i2c_master_xfer_gpio12(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
+{
+ struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ int msg_index;
+ int ret = 0;
+
+ dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_1_2);
+ for (msg_index = 0; msg_index<num; msg_index++) {
+ if (msg[msg_index].flags & I2C_M_RD)
+ {
+ ret = dibx000_master_i2c_read(mst, &msg[msg_index]);
+ if (ret != 0)
+ return 0;
+ }
+ else
+ {
+ ret = dibx000_master_i2c_write(mst, &msg[msg_index], 1);
+ if (ret != 0)
+ return 0;
+ }
+ }
+
+ return num;
+}
+
+static int dibx000_i2c_master_xfer_gpio34(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
+{
+ struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ int msg_index;
+ int ret = 0;
+
+ dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_3_4);
+ for (msg_index = 0; msg_index<num; msg_index++) {
+ if (msg[msg_index].flags & I2C_M_RD)
+ {
+ ret = dibx000_master_i2c_read(mst, &msg[msg_index]);
+ if (ret != 0)
+ return 0;
+ }
+ else
+ {
+ ret = dibx000_master_i2c_write(mst, &msg[msg_index], 1);
+ if (ret != 0)
+ return 0;
+ }
+ }
+
+ return num;
+}
+
+static struct i2c_algorithm dibx000_i2c_master_gpio12_xfer_algo = {
+ .master_xfer = dibx000_i2c_master_xfer_gpio12,
+ .functionality = dibx000_i2c_func,
+};
+
+static struct i2c_algorithm dibx000_i2c_master_gpio34_xfer_algo = {
+ .master_xfer = dibx000_i2c_master_xfer_gpio34,
+ .functionality = dibx000_i2c_func,
+};
+
static int dibx000_i2c_gate_ctrl(struct dibx000_i2c_master *mst, u8 tx[4],
u8 addr, int onoff)
{
return 0;
}
-static u32 dibx000_i2c_func(struct i2c_adapter *adapter)
+static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg msg[], int num)
{
- return I2C_FUNC_I2C;
+ struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ struct i2c_msg m[2 + num];
+ u8 tx_open[4], tx_close[4];
+
+ memset(m, 0, sizeof(struct i2c_msg) * (2 + num));
+
+ dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_6_7);
+
+ dibx000_i2c_gate_ctrl(mst, tx_open, msg[0].addr, 1);
+ m[0].addr = mst->i2c_addr;
+ m[0].buf = tx_open;
+ m[0].len = 4;
+
+ memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
+
+ dibx000_i2c_gate_ctrl(mst, tx_close, 0, 0);
+ m[num + 1].addr = mst->i2c_addr;
+ m[num + 1].buf = tx_close;
+ m[num + 1].len = 4;
+
+ return i2c_transfer(mst->i2c_adap, m, 2 + num) == 2 + num ? num : -EIO;
}
+static struct i2c_algorithm dibx000_i2c_gated_gpio67_algo = {
+ .master_xfer = dibx000_i2c_gated_gpio67_xfer,
+ .functionality = dibx000_i2c_func,
+};
+
static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msg[], int num)
{
};
struct i2c_adapter *dibx000_get_i2c_adapter(struct dibx000_i2c_master *mst,
- enum dibx000_i2c_interface intf,
- int gating)
+ enum dibx000_i2c_interface intf,
+ int gating)
{
struct i2c_adapter *i2c = NULL;
if (gating)
i2c = &mst->gated_tuner_i2c_adap;
break;
+ case DIBX000_I2C_INTERFACE_GPIO_1_2:
+ if (!gating)
+ i2c = &mst->master_i2c_adap_gpio12;
+ break;
+ case DIBX000_I2C_INTERFACE_GPIO_3_4:
+ if (!gating)
+ i2c = &mst->master_i2c_adap_gpio34;
+ break;
+ case DIBX000_I2C_INTERFACE_GPIO_6_7:
+ if (gating)
+ i2c = &mst->master_i2c_adap_gpio67;
+ break;
default:
printk(KERN_ERR "DiBX000: incorrect I2C interface selected\n");
break;
EXPORT_SYMBOL(dibx000_reset_i2c_master);
static int i2c_adapter_init(struct i2c_adapter *i2c_adap,
- struct i2c_algorithm *algo, const char *name,
- struct dibx000_i2c_master *mst)
+ struct i2c_algorithm *algo, const char *name,
+ struct dibx000_i2c_master *mst)
{
strncpy(i2c_adap->name, name, sizeof(i2c_adap->name));
i2c_adap->algo = algo;
}
int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
- struct i2c_adapter *i2c_adap, u8 i2c_addr)
+ struct i2c_adapter *i2c_adap, u8 i2c_addr)
{
u8 tx[4];
struct i2c_msg m = {.addr = i2c_addr >> 1,.buf = tx,.len = 4 };
else
mst->base_reg = 768;
+ mst->gated_tuner_i2c_adap.dev.parent = mst->i2c_adap->dev.parent;
+ if (i2c_adapter_init
+ (&mst->gated_tuner_i2c_adap, &dibx000_i2c_gated_tuner_algo,
+ "DiBX000 tuner I2C bus", mst) != 0)
+ printk(KERN_ERR
+ "DiBX000: could not initialize the tuner i2c_adapter\n");
+
+ mst->master_i2c_adap_gpio12.dev.parent = mst->i2c_adap->dev.parent;
+ if (i2c_adapter_init
+ (&mst->master_i2c_adap_gpio12, &dibx000_i2c_master_gpio12_xfer_algo,
+ "DiBX000 master GPIO12 I2C bus", mst) != 0)
+ printk(KERN_ERR
+ "DiBX000: could not initialize the master i2c_adapter\n");
+
+ mst->master_i2c_adap_gpio34.dev.parent = mst->i2c_adap->dev.parent;
+ if (i2c_adapter_init
+ (&mst->master_i2c_adap_gpio34, &dibx000_i2c_master_gpio34_xfer_algo,
+ "DiBX000 master GPIO34 I2C bus", mst) != 0)
+ printk(KERN_ERR
+ "DiBX000: could not initialize the master i2c_adapter\n");
+
+ mst->master_i2c_adap_gpio67.dev.parent = mst->i2c_adap->dev.parent;
if (i2c_adapter_init
- (&mst->gated_tuner_i2c_adap, &dibx000_i2c_gated_tuner_algo,
- "DiBX000 tuner I2C bus", mst) != 0)
+ (&mst->master_i2c_adap_gpio67, &dibx000_i2c_gated_gpio67_algo,
+ "DiBX000 master GPIO67 I2C bus", mst) != 0)
printk(KERN_ERR
- "DiBX000: could not initialize the tuner i2c_adapter\n");
+ "DiBX000: could not initialize the master i2c_adapter\n");
/* initialize the i2c-master by closing the gate */
dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
void dibx000_exit_i2c_master(struct dibx000_i2c_master *mst)
{
i2c_del_adapter(&mst->gated_tuner_i2c_adap);
+ i2c_del_adapter(&mst->master_i2c_adap_gpio12);
+ i2c_del_adapter(&mst->master_i2c_adap_gpio34);
+ i2c_del_adapter(&mst->master_i2c_adap_gpio67);
}
EXPORT_SYMBOL(dibx000_exit_i2c_master);
u32 systime(void)
{
- struct timespec t;
+ struct timespec t;
- t = current_kernel_time();
- return (t.tv_sec * 10000) + (t.tv_nsec / 100000);
+ t = current_kernel_time();
+ return (t.tv_sec * 10000) + (t.tv_nsec / 100000);
}
EXPORT_SYMBOL(systime);
projects / platform / kernel / linux-starfive.git / commitdiff