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Diffstat (limited to 'drivers/media/dvb/b2c2/flexcop-i2c.c')
-rw-r--r--drivers/media/dvb/b2c2/flexcop-i2c.c288
1 files changed, 0 insertions, 288 deletions
diff --git a/drivers/media/dvb/b2c2/flexcop-i2c.c b/drivers/media/dvb/b2c2/flexcop-i2c.c
deleted file mode 100644
index 965d5eb33752..000000000000
--- a/drivers/media/dvb/b2c2/flexcop-i2c.c
+++ /dev/null
@@ -1,288 +0,0 @@
-/*
- * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
- * flexcop-i2c.c - flexcop internal 2Wire bus (I2C) and dvb i2c initialization
- * see flexcop.c for copyright information
- */
-#include "flexcop.h"
-
-#define FC_MAX_I2C_RETRIES 100000
-
-static int flexcop_i2c_operation(struct flexcop_device *fc,
- flexcop_ibi_value *r100)
-{
- int i;
- flexcop_ibi_value r;
-
- r100->tw_sm_c_100.working_start = 1;
- deb_i2c("r100 before: %08x\n",r100->raw);
-
- fc->write_ibi_reg(fc, tw_sm_c_100, ibi_zero);
- fc->write_ibi_reg(fc, tw_sm_c_100, *r100); /* initiating i2c operation */
-
- for (i = 0; i < FC_MAX_I2C_RETRIES; i++) {
- r = fc->read_ibi_reg(fc, tw_sm_c_100);
-
- if (!r.tw_sm_c_100.no_base_addr_ack_error) {
- if (r.tw_sm_c_100.st_done) {
- *r100 = r;
- deb_i2c("i2c success\n");
- return 0;
- }
- } else {
- deb_i2c("suffering from an i2c ack_error\n");
- return -EREMOTEIO;
- }
- }
- deb_i2c("tried %d times i2c operation, "
- "never finished or too many ack errors.\n", i);
- return -EREMOTEIO;
-}
-
-static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
- flexcop_ibi_value r100, u8 *buf)
-{
- flexcop_ibi_value r104;
- int len = r100.tw_sm_c_100.total_bytes,
- /* remember total_bytes is buflen-1 */
- ret;
-
- /* work-around to have CableStar2 and SkyStar2 rev 2.7 work
- * correctly:
- *
- * the ITD1000 is behind an i2c-gate which closes automatically
- * after an i2c-transaction the STV0297 needs 2 consecutive reads
- * one with no_base_addr = 0 and one with 1
- *
- * those two work-arounds are conflictin: we check for the card
- * type, it is set when probing the ITD1000 */
- if (i2c->fc->dev_type == FC_SKY_REV27)
- r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
-
- ret = flexcop_i2c_operation(i2c->fc, &r100);
- if (ret != 0) {
- deb_i2c("Retrying operation\n");
- r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
- ret = flexcop_i2c_operation(i2c->fc, &r100);
- }
- if (ret != 0) {
- deb_i2c("read failed. %d\n", ret);
- return ret;
- }
-
- buf[0] = r100.tw_sm_c_100.data1_reg;
-
- if (len > 0) {
- r104 = i2c->fc->read_ibi_reg(i2c->fc, tw_sm_c_104);
- deb_i2c("read: r100: %08x, r104: %08x\n", r100.raw, r104.raw);
-
- /* there is at least one more byte, otherwise we wouldn't be here */
- buf[1] = r104.tw_sm_c_104.data2_reg;
- if (len > 1) buf[2] = r104.tw_sm_c_104.data3_reg;
- if (len > 2) buf[3] = r104.tw_sm_c_104.data4_reg;
- }
- return 0;
-}
-
-static int flexcop_i2c_write4(struct flexcop_device *fc,
- flexcop_ibi_value r100, u8 *buf)
-{
- flexcop_ibi_value r104;
- int len = r100.tw_sm_c_100.total_bytes; /* remember total_bytes is buflen-1 */
- r104.raw = 0;
-
- /* there is at least one byte, otherwise we wouldn't be here */
- r100.tw_sm_c_100.data1_reg = buf[0];
- r104.tw_sm_c_104.data2_reg = len > 0 ? buf[1] : 0;
- r104.tw_sm_c_104.data3_reg = len > 1 ? buf[2] : 0;
- r104.tw_sm_c_104.data4_reg = len > 2 ? buf[3] : 0;
-
- deb_i2c("write: r100: %08x, r104: %08x\n", r100.raw, r104.raw);
-
- /* write the additional i2c data before doing the actual i2c operation */
- fc->write_ibi_reg(fc, tw_sm_c_104, r104);
- return flexcop_i2c_operation(fc, &r100);
-}
-
-int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
- flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
-{
- int ret;
-
-#ifdef DUMP_I2C_MESSAGES
- int i;
-#endif
-
- u16 bytes_to_transfer;
- flexcop_ibi_value r100;
-
- deb_i2c("op = %d\n",op);
- r100.raw = 0;
- r100.tw_sm_c_100.chipaddr = chipaddr;
- r100.tw_sm_c_100.twoWS_rw = op;
- r100.tw_sm_c_100.twoWS_port_reg = i2c->port;
-
-#ifdef DUMP_I2C_MESSAGES
- printk(KERN_DEBUG "%d ", i2c->port);
- if (op == FC_READ)
- printk("rd(");
- else
- printk("wr(");
- printk("%02x): %02x ", chipaddr, addr);
-#endif
-
- /* in that case addr is the only value ->
- * we write it twice as baseaddr and val0
- * BBTI is doing it like that for ISL6421 at least */
- if (i2c->no_base_addr && len == 0 && op == FC_WRITE) {
- buf = &addr;
- len = 1;
- }
-
- while (len != 0) {
- bytes_to_transfer = len > 4 ? 4 : len;
-
- r100.tw_sm_c_100.total_bytes = bytes_to_transfer - 1;
- r100.tw_sm_c_100.baseaddr = addr;
-
- if (op == FC_READ)
- ret = flexcop_i2c_read4(i2c, r100, buf);
- else
- ret = flexcop_i2c_write4(i2c->fc, r100, buf);
-
-#ifdef DUMP_I2C_MESSAGES
- for (i = 0; i < bytes_to_transfer; i++)
- printk("%02x ", buf[i]);
-#endif
-
- if (ret < 0)
- return ret;
-
- buf += bytes_to_transfer;
- addr += bytes_to_transfer;
- len -= bytes_to_transfer;
- }
-
-#ifdef DUMP_I2C_MESSAGES
- printk("\n");
-#endif
-
- return 0;
-}
-/* exported for PCI i2c */
-EXPORT_SYMBOL(flexcop_i2c_request);
-
-/* master xfer callback for demodulator */
-static int flexcop_master_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[], int num)
-{
- struct flexcop_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
- int i, ret = 0;
-
- /* Some drivers use 1 byte or 0 byte reads as probes, which this
- * driver doesn't support. These probes will always fail, so this
- * hack makes them always succeed. If one knew how, it would of
- * course be better to actually do the read. */
- if (num == 1 && msgs[0].flags == I2C_M_RD && msgs[0].len <= 1)
- return 1;
-
- if (mutex_lock_interruptible(&i2c->fc->i2c_mutex))
- return -ERESTARTSYS;
-
- for (i = 0; i < num; i++) {
- /* reading */
- if (i+1 < num && (msgs[i+1].flags == I2C_M_RD)) {
- ret = i2c->fc->i2c_request(i2c, FC_READ, msgs[i].addr,
- msgs[i].buf[0], msgs[i+1].buf,
- msgs[i+1].len);
- i++; /* skip the following message */
- } else /* writing */
- ret = i2c->fc->i2c_request(i2c, FC_WRITE, msgs[i].addr,
- msgs[i].buf[0], &msgs[i].buf[1],
- msgs[i].len - 1);
- if (ret < 0) {
- deb_i2c("i2c master_xfer failed");
- break;
- }
- }
-
- mutex_unlock(&i2c->fc->i2c_mutex);
-
- if (ret == 0)
- ret = num;
- return ret;
-}
-
-static u32 flexcop_i2c_func(struct i2c_adapter *adapter)
-{
- return I2C_FUNC_I2C;
-}
-
-static struct i2c_algorithm flexcop_algo = {
- .master_xfer = flexcop_master_xfer,
- .functionality = flexcop_i2c_func,
-};
-
-int flexcop_i2c_init(struct flexcop_device *fc)
-{
- int ret;
- mutex_init(&fc->i2c_mutex);
-
- fc->fc_i2c_adap[0].fc = fc;
- fc->fc_i2c_adap[1].fc = fc;
- fc->fc_i2c_adap[2].fc = fc;
- fc->fc_i2c_adap[0].port = FC_I2C_PORT_DEMOD;
- fc->fc_i2c_adap[1].port = FC_I2C_PORT_EEPROM;
- fc->fc_i2c_adap[2].port = FC_I2C_PORT_TUNER;
-
- strlcpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
- sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
- strlcpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
- sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
- strlcpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
- sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
-
- i2c_set_adapdata(&fc->fc_i2c_adap[0].i2c_adap, &fc->fc_i2c_adap[0]);
- i2c_set_adapdata(&fc->fc_i2c_adap[1].i2c_adap, &fc->fc_i2c_adap[1]);
- i2c_set_adapdata(&fc->fc_i2c_adap[2].i2c_adap, &fc->fc_i2c_adap[2]);
-
- fc->fc_i2c_adap[0].i2c_adap.algo =
- fc->fc_i2c_adap[1].i2c_adap.algo =
- fc->fc_i2c_adap[2].i2c_adap.algo = &flexcop_algo;
- fc->fc_i2c_adap[0].i2c_adap.algo_data =
- fc->fc_i2c_adap[1].i2c_adap.algo_data =
- fc->fc_i2c_adap[2].i2c_adap.algo_data = NULL;
- fc->fc_i2c_adap[0].i2c_adap.dev.parent =
- fc->fc_i2c_adap[1].i2c_adap.dev.parent =
- fc->fc_i2c_adap[2].i2c_adap.dev.parent = fc->dev;
-
- ret = i2c_add_adapter(&fc->fc_i2c_adap[0].i2c_adap);
- if (ret < 0)
- return ret;
-
- ret = i2c_add_adapter(&fc->fc_i2c_adap[1].i2c_adap);
- if (ret < 0)
- goto adap_1_failed;
-
- ret = i2c_add_adapter(&fc->fc_i2c_adap[2].i2c_adap);
- if (ret < 0)
- goto adap_2_failed;
-
- fc->init_state |= FC_STATE_I2C_INIT;
- return 0;
-
-adap_2_failed:
- i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
-adap_1_failed:
- i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
- return ret;
-}
-
-void flexcop_i2c_exit(struct flexcop_device *fc)
-{
- if (fc->init_state & FC_STATE_I2C_INIT) {
- i2c_del_adapter(&fc->fc_i2c_adap[2].i2c_adap);
- i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
- i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
- }
- fc->init_state &= ~FC_STATE_I2C_INIT;
-}
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