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minix/drivers/tda19988/tda19988.c
Thomas Cort 75bd3009d3 libi2cdriver: add functions for IC register access 
Many i2c device drivers used similar code to access registers on
the ICs they drive. This commit implements that functionality in
libi2cdriver and updates the drivers to use the library instead of
their own register access functions. The net result is 375+ fewer
lines of code and less work for people developing new drivers.

The two exceptions were cat24c256 and parts of tda19988. They access
the bus in uncommon ways. It doesn't make sense at this time to
move their read/write functions into libi2cdriver.

Change-Id: Id8280b71af33b710a49944d7f20a7262be9f5988
2013-09-18 08:10:26 -04:00

1034 lines
22 KiB
C
Raw Blame History

#include <minix/blockdriver.h>
#include <minix/drivers.h>
#include <minix/ds.h>
#include <minix/i2c.h>
#include <minix/i2cdriver.h>
#include <minix/log.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
/* constants */
#define NR_DEVS 1 /* number of devices this driver handles */
#define TDA19988_DEV 0 /* index of TDA19988 device */
#define EDID_LEN 128 /* length of standard EDID block */
/* When passing data over a grant one needs to pass
* a buffer to sys_safecopy copybuff is used for that*/
#define COPYBUF_SIZE 0x1000 /* 4k buf */
static unsigned char copybuf[COPYBUF_SIZE];
/* The device has two I2C interfaces CEC (0x34) and HDMI (0x70). This driver
* needs access to both.
*/
/*
* CEC - Register and Bit Definitions
*/
#define CEC_STATUS_REG 0xfe
#define CEC_STATUS_CONNECTED_MASK 0x02
#define CEC_ENABLE_REG 0xff
#define CEC_ENABLE_ALL_MASK 0x87
/*
* HDMI - Pages
*
* The HDMI part is much bigger than the CEC part. Memory is accessed according
* to page and address. Once the page is set, only the address needs to be
* sent if accessing memory locations within the same page (you don't need to
* send the page number every time).
*/
#define HDMI_CTRL_PAGE 0x00
#define HDMI_PPL_PAGE 0x02
#define HDMI_EDID_PAGE 0x09
#define HDMI_INFO_PAGE 0x10
#define HDMI_AUDIO_PAGE 0x11
#define HDMI_HDCP_OTP_PAGE 0x12
#define HDMI_GAMUT_PAGE 0x13
/*
* The page select register isn't part of a page. A dummy value of 0xff is
* used to signfiy this in the code.
*/
#define HDMI_PAGELESS 0xff
/*
* Control Page Registers and Bit Definitions
*/
#define HDMI_CTRL_REV_LO_REG 0x00
#define HDMI_CTRL_REV_HI_REG 0x02
#define HDMI_CTRL_RESET_REG 0x0a
#define HDMI_CTRL_RESET_DDC_MASK 0x02
#define HDMI_CTRL_DDC_CTRL_REG 0x0b
#define HDMI_CTRL_DDC_EN_MASK 0x00
#define HDMI_CTRL_DDC_CLK_REG 0x0c
#define HDMI_CTRL_DDC_CLK_EN_MASK 0x01
#define HDMI_CTRL_INTR_CTRL_REG 0x0f
#define HDMI_CTRL_INTR_EN_GLO_MASK 0x04
#define HDMI_CTRL_INT_REG 0x11
#define HDMI_CTRL_INT_EDID_MASK 0x02
/*
* EDID Page Registers and Bit Definitions
*/
#define HDMI_EDID_DATA_REG 0x00
#define HDMI_EDID_DEV_ADDR_REG 0xfb
#define HDMI_EDID_DEV_ADDR 0xa0
#define HDMI_EDID_OFFSET_REG 0xfc
#define HDMI_EDID_OFFSET 0x00
#define HDMI_EDID_SEG_PTR_ADDR_REG 0xfc
#define HDMI_EDID_SEG_PTR_ADDR 0x00
#define HDMI_EDID_SEG_ADDR_REG 0xfe
#define HDMI_EDID_SEG_ADDR 0x00
#define HDMI_EDID_REQ_REG 0xfa
#define HDMI_EDID_REQ_READ_MASK 0x01
/*
* HDCP and OTP
*/
#define HDMI_HDCP_OTP_DDC_CLK_REG 0x9a
#define HDMI_HDCP_OTP_DDC_CLK_MASK 0x27
/* this register/mask isn't documented but it has to be cleared/set */
#define HDMI_HDCP_OTP_SOME_REG 0x9b
#define HDMI_HDCP_OTP_SOME_MASK 0x02
/*
* Pageless Registers
*/
#define HDMI_PAGE_SELECT_REG 0xff
/*
* Constants
*/
/* Revision of the TDA19988. */
#define HDMI_REV_TDA19988 0x0331
/* the bus that this device is on (counting starting at 1) */
static uint32_t cec_bus;
static uint32_t hdmi_bus;
/* slave address of the device */
static i2c_addr_t cec_address;
static i2c_addr_t hdmi_address;
/* endpoint for the driver for the bus itself. */
static endpoint_t cec_bus_endpoint;
static endpoint_t hdmi_bus_endpoint;
/* logging - use with log_warn(), log_info(), log_debug(), log_trace(), etc */
static struct log log = {
.name = "tda19988",
.log_level = LEVEL_INFO,
.log_func = default_log
};
static void sef_local_startup(void);
static int sef_cb_lu_state_save(int);
static int lu_state_restore(void);
static int sef_cb_init(int type, sef_init_info_t * info);
/* CEC Module */
static int is_display_connected(void);
static int enable_hdmi_module(void);
/* HDMI Module */
static int set_page(uint8_t page);
static int hdmi_read(uint8_t page, uint8_t reg, uint8_t * val);
static int hdmi_write(uint8_t page, uint8_t reg, uint8_t val);
static int hdmi_set(uint8_t page, uint8_t reg, uint8_t mask);
static int hdmi_clear(uint8_t page, uint8_t reg, uint8_t mask);
static int hdmi_ddc_enable(void);
static int hdmi_init(void);
static int check_revision(void);
static int read_edid(uint8_t * data, size_t count);
/* libblockdriver callbacks */
static int tda19988_blk_open(dev_t minor, int access);
static int tda19988_blk_close(dev_t minor);
static ssize_t tda19988_blk_transfer(dev_t minor, int do_write, u64_t pos,
endpoint_t endpt, iovec_t * iov, unsigned count, int flags);
static int tda19988_blk_ioctl(dev_t minor, unsigned int request,
endpoint_t endpt, cp_grant_id_t grant);
static struct device *tda19988_blk_part(dev_t minor);
static int tda19988_blk_other(message * m);
/* Entry points into the device dependent code of block drivers. */
struct blockdriver tda19988_tab = {
.bdr_type = BLOCKDRIVER_TYPE_OTHER,
.bdr_open = tda19988_blk_open,
.bdr_close = tda19988_blk_close,
.bdr_transfer = tda19988_blk_transfer,
.bdr_ioctl = tda19988_blk_ioctl, /* nop -- always returns EINVAL */
.bdr_cleanup = NULL, /* nothing allocated -- nothing to clean up */
.bdr_part = tda19988_blk_part,
.bdr_geometry = NULL, /* no geometry (cylinders, heads, sectors, etc) */
.bdr_intr = NULL, /* i2c devices don't generate interrupts */
.bdr_alarm = NULL, /* alarm not needed */
.bdr_other = tda19988_blk_other, /* to recv notify events from DS */
.bdr_device = NULL /* 1 insance per device, threads not needed */
};
/* counts the number of times a device file is open */
static int openct[NR_DEVS];
/* base and size of each device */
static struct device geom[NR_DEVS];
static int
tda19988_blk_open(dev_t minor, int access)
{
log_trace(&log, "tda19988_blk_open(%d,%d)\n", minor, access);
if (tda19988_blk_part(minor) == NULL) {
return ENXIO;
}
openct[minor]++;
return OK;
}
static int
tda19988_blk_close(dev_t minor)
{
log_trace(&log, "tda19988_blk_close(%d)\n", minor);
if (tda19988_blk_part(minor) == NULL) {
return ENXIO;
}
if (openct[minor] < 1) {
log_warn(&log, "closing unopened device %d\n", minor);
return EINVAL;
}
openct[minor]--;
return OK;
}
static ssize_t
tda19988_blk_transfer(dev_t minor, int do_write, u64_t pos64,
endpoint_t endpt, iovec_t * iov, unsigned nr_req, int flags)
{
unsigned count;
struct device *dv;
u64_t dv_size;
int r;
cp_grant_id_t grant;
log_trace(&log, "tda19988_blk_transfer()\n");
/* Get minor device information. */
dv = tda19988_blk_part(minor);
if (dv == NULL) {
return ENXIO;
}
if (nr_req > NR_IOREQS) {
return EINVAL;
}
dv_size = dv->dv_size;
if (pos64 >= dv_size) {
return OK; /* Beyond EOF */
}
if (nr_req > 0) {
/* How much to transfer and where to / from. */
count = iov->iov_size;
grant = (cp_grant_id_t) iov->iov_addr;
/* check for EOF */
if (pos64 >= dv_size) {
return 0;
}
/* don't go past the end of the device */
if (pos64 + count > dv_size) {
count = dv_size - pos64;
}
/* don't overflow copybuf */
if (count > COPYBUF_SIZE) {
count = COPYBUF_SIZE;
}
log_debug(&log, "transfering 0x%x bytes\n", count);
if (do_write) {
log_warn(&log, "Error: writing to read-only device\n");
return EACCES;
} else {
if (is_display_connected() == 1) {
r = hdmi_init();
if (r != OK) {
log_warn(&log,
"Failed to enable HDMI module\n");
return EIO;
}
memset(copybuf, '\0', COPYBUF_SIZE);
r = read_edid(copybuf, count);
if (r != OK) {
log_warn(&log,
"read_edid() failed (r=%d)\n", r);
return r;
}
r = sys_safecopyto(endpt, grant, (vir_bytes)
0, (vir_bytes) copybuf, count);
if (r != OK) {
log_warn(&log, "safecopyto failed\n");
return EINVAL;
}
return iov->iov_size;
} else {
log_warn(&log, "Display not connected.\n");
return ENODEV;
}
}
} else {
/* empty request */
return 0;
}
}
static int
tda19988_blk_ioctl(dev_t minor, unsigned int request, endpoint_t endpt,
cp_grant_id_t grant)
{
log_trace(&log, "tda19988_blk_ioctl(%d)\n", minor);
/* no supported ioctls for this device */
return EINVAL;
}
static struct device *
tda19988_blk_part(dev_t minor)
{
log_trace(&log, "tda19988_blk_part(%d)\n", minor);
if (minor >= NR_DEVS) {
return NULL;
}
return &geom[minor];
}
static int
tda19988_blk_other(message * m)
{
int r;
log_trace(&log, "tda19988_blk_other(0x%x)\n", m->m_type);
switch (m->m_type) {
case NOTIFY_MESSAGE:
if (m->m_source == DS_PROC_NR) {
log_debug(&log,
"bus driver changed state, update endpoint\n");
i2cdriver_handle_bus_update(&cec_bus_endpoint, cec_bus,
cec_address);
i2cdriver_handle_bus_update(&hdmi_bus_endpoint,
hdmi_bus, hdmi_address);
}
r = OK;
break;
default:
log_warn(&log, "Invalid message type (0x%x)\n", m->m_type);
r = EINVAL;
break;
}
return r;
}
/*
* Check to see if a display is connected.
* Returns 1 for yes, 0 for no, -1 for error.
*/
static int
is_display_connected(void)
{
int r;
uint8_t val;
r = i2creg_read8(cec_bus_endpoint, cec_address, CEC_STATUS_REG, &val);
if (r != OK) {
log_warn(&log, "Reading connection status failed (r=%d)\n", r);
return -1;
}
if ((CEC_STATUS_CONNECTED_MASK & val) == 0) {
log_debug(&log, "No Display Detected\n");
return 0;
} else {
log_debug(&log, "Display Detected\n");
return 1;
}
}
/*
* Enable all the modules and clocks.
*/
static int
enable_hdmi_module(void)
{
int r;
r = i2creg_write8(cec_bus_endpoint, cec_address, CEC_ENABLE_REG,
CEC_ENABLE_ALL_MASK);
if (r != OK) {
log_warn(&log, "Writing enable bits failed (r=%d)\n", r);
return -1;
}
log_debug(&log, "HDMI module enabled\n");
return OK;
}
static int
set_page(uint8_t page)
{
int r;
static int current_page = HDMI_PAGELESS;
if (page != current_page) {
r = i2creg_write8(hdmi_bus_endpoint, hdmi_address,
HDMI_PAGE_SELECT_REG, page);
if (r != OK) {
return r;
}
current_page = page;
}
return OK;
}
static int
hdmi_read_block(uint8_t page, uint8_t reg, uint8_t * buf, size_t buflen)
{
int r;
minix_i2c_ioctl_exec_t ioctl_exec;
if (buf == NULL || buflen > I2C_EXEC_MAX_BUFLEN) {
log_warn(&log,
"Read block called with NULL pointer or invalid buflen.\n");
return EINVAL;
}
if (page != HDMI_PAGELESS) {
r = set_page(page);
if (r != OK) {
log_warn(&log, "Unable to set page to 0x%x\n", page);
return r;
}
}
memset(&ioctl_exec, '\0', sizeof(minix_i2c_ioctl_exec_t));
/* Read from HDMI */
ioctl_exec.iie_op = I2C_OP_READ_WITH_STOP;
ioctl_exec.iie_addr = hdmi_address;
/* write the register address */
ioctl_exec.iie_cmd[0] = reg;
ioctl_exec.iie_cmdlen = 1;
/* read bytes */
ioctl_exec.iie_buflen = buflen;
r = i2cdriver_exec(hdmi_bus_endpoint, &ioctl_exec);
if (r != OK) {
log_warn(&log, "hdmi_read() failed (r=%d)\n", r);
return -1;
}
memcpy(buf, ioctl_exec.iie_buf, buflen);
log_trace(&log, "Read %d bytes from reg 0x%x in page 0x%x\n", buflen,
reg, page);
return OK;
}
static int
hdmi_read(uint8_t page, uint8_t reg, uint8_t * val)
{
int r;
if (val == NULL) {
log_warn(&log, "Read called with NULL pointer\n");
return EINVAL;
}
if (page != HDMI_PAGELESS) {
r = set_page(page);
if (r != OK) {
log_warn(&log, "Unable to set page to 0x%x\n", page);
return r;
}
}
r = i2creg_read8(hdmi_bus_endpoint, hdmi_address, reg, val);
if (r != OK) {
log_warn(&log, "hdmi_read() failed (r=%d)\n", r);
return -1;
}
log_trace(&log, "Read 0x%x from reg 0x%x in page 0x%x\n", *val, reg,
page);
return OK;
}
static int
hdmi_write(uint8_t page, uint8_t reg, uint8_t val)
{
int r;
if (page != HDMI_PAGELESS) {
r = set_page(page);
if (r != OK) {
log_warn(&log, "Unable to set page to 0x%x\n", page);
return r;
}
}
r = i2creg_write8(hdmi_bus_endpoint, hdmi_address, reg, val);
if (r != OK) {
log_warn(&log, "hdmi_write() failed (r=%d)\n", r);
return -1;
}
log_trace(&log, "Successfully wrote 0x%x to reg 0x%x in page 0x%x\n",
val, reg, page);
return OK;
}
static int
hdmi_set(uint8_t page, uint8_t reg, uint8_t mask)
{
int r;
uint8_t val;
val = 0x00;
r = hdmi_read(page, reg, &val);
if (r != OK) {
return r;
}
val |= mask;
r = hdmi_write(page, reg, val);
if (r != OK) {
return r;
}
return OK;
}
static int
hdmi_clear(uint8_t page, uint8_t reg, uint8_t mask)
{
int r;
uint8_t val;
val = 0x00;
r = hdmi_read(page, reg, &val);
if (r != OK) {
return r;
}
val &= ~mask;
r = hdmi_write(page, reg, val);
if (r != OK) {
return r;
}
return OK;
}
static int
check_revision(void)
{
int r;
uint8_t rev_lo;
uint8_t rev_hi;
uint16_t revision;
r = hdmi_read(HDMI_CTRL_PAGE, HDMI_CTRL_REV_LO_REG, &rev_lo);
if (r != OK) {
log_warn(&log, "Failed to read rev_lo (r=%d)\n", r);
return -1;
}
r = hdmi_read(HDMI_CTRL_PAGE, HDMI_CTRL_REV_HI_REG, &rev_hi);
if (r != OK) {
log_warn(&log, "Failed to read rev_hi (r=%d)\n", r);
return -1;
}
revision = ((rev_hi << 8) | rev_lo);
if (revision != HDMI_REV_TDA19988) {
log_warn(&log, "Unrecognized value in revision registers.\n");
log_warn(&log, "Read: 0x%x | Expected: 0x%x\n", revision,
HDMI_REV_TDA19988);
return -1;
}
log_debug(&log, "Device Revision: 0x%x\n", revision);
return OK;
}
static int
hdmi_ddc_enable(void)
{
int r;
/* Soft Reset DDC Bus */
r = hdmi_set(HDMI_CTRL_PAGE, HDMI_CTRL_RESET_REG,
HDMI_CTRL_RESET_DDC_MASK);
if (r != OK) {
return r;
}
micro_delay(100000);
r = hdmi_clear(HDMI_CTRL_PAGE, HDMI_CTRL_RESET_REG,
HDMI_CTRL_RESET_DDC_MASK);
if (r != OK) {
return r;
}
micro_delay(100000);
/* Enable DDC */
r = hdmi_write(HDMI_CTRL_PAGE, HDMI_CTRL_DDC_CTRL_REG,
HDMI_CTRL_DDC_EN_MASK);
if (r != OK) {
return r;
}
/* Setup the clock (I think) */
r = hdmi_write(HDMI_CTRL_PAGE, HDMI_CTRL_DDC_CLK_REG,
HDMI_CTRL_DDC_CLK_EN_MASK);
if (r != OK) {
return r;
}
r = hdmi_write(HDMI_HDCP_OTP_PAGE, HDMI_HDCP_OTP_DDC_CLK_REG,
HDMI_HDCP_OTP_DDC_CLK_MASK);
if (r != OK) {
return r;
}
log_debug(&log, "DDC Enabled\n");
return OK;
}
static int
hdmi_init(void)
{
int r;
/* Turn on HDMI module (slave 0x70) */
r = enable_hdmi_module();
if (r != OK) {
log_warn(&log, "HDMI Module Init Failed\n");
return -1;
}
/* Read chip version to ensure compatibility */
r = check_revision();
if (r != OK) {
log_warn(&log, "Couldn't find expected TDA19988 revision\n");
return -1;
}
/* Turn on DDC interface between TDA19988 and display */
r = hdmi_ddc_enable();
if (r != OK) {
log_warn(&log, "Failed to enable DDC\n");
return -1;
}
return OK;
}
static int
read_edid(uint8_t * buf, size_t count)
{
int r;
int i, j;
int tries;
int edid_ready;
uint8_t val;
log_debug(&log, "Reading edid...\n");
if (buf == NULL || count < EDID_LEN) {
log_warn(&log, "Expected 128 byte data buffer\n");
return -1;
}
r = hdmi_clear(HDMI_HDCP_OTP_PAGE, HDMI_HDCP_OTP_SOME_REG,
HDMI_HDCP_OTP_SOME_MASK);
if (r != OK) {
log_warn(&log, "Failed to clear bit in HDCP OTP reg\n");
return -1;
}
/* Enable EDID Block Read Interrupt */
r = hdmi_set(HDMI_CTRL_PAGE, HDMI_CTRL_INT_REG,
HDMI_CTRL_INT_EDID_MASK);
if (r != OK) {
log_warn(&log, "Failed to enable EDID Block Read interrupt\n");
return -1;
}
/* enable global interrupts */
r = hdmi_write(HDMI_CTRL_PAGE, HDMI_CTRL_INTR_CTRL_REG,
HDMI_CTRL_INTR_EN_GLO_MASK);
if (r != OK) {
log_warn(&log, "Failed to enable interrupts\n");
return -1;
}
/* Set Device Address */
r = hdmi_write(HDMI_EDID_PAGE, HDMI_EDID_DEV_ADDR_REG,
HDMI_EDID_DEV_ADDR);
if (r != OK) {
log_warn(&log, "Couldn't set device address\n");
return -1;
}
/* Set Offset */
r = hdmi_write(HDMI_EDID_PAGE, HDMI_EDID_OFFSET_REG, HDMI_EDID_OFFSET);
if (r != OK) {
log_warn(&log, "Couldn't set offset\n");
return -1;
}
/* Set Segment Pointer Address */
r = hdmi_write(HDMI_EDID_PAGE, HDMI_EDID_SEG_PTR_ADDR_REG,
HDMI_EDID_SEG_PTR_ADDR);
if (r != OK) {
log_warn(&log, "Couldn't set segment pointer address\n");
return -1;
}
/* Set Segment Address */
r = hdmi_write(HDMI_EDID_PAGE, HDMI_EDID_SEG_ADDR_REG,
HDMI_EDID_SEG_ADDR);
if (r != OK) {
log_warn(&log, "Couldn't set segment address\n");
return -1;
}
/*
* Toggle EDID Read Request Bit to request a read.
*/
r = hdmi_write(HDMI_EDID_PAGE, HDMI_EDID_REQ_REG,
HDMI_EDID_REQ_READ_MASK);
if (r != OK) {
log_warn(&log, "Couldn't set Read Request bit\n");
return -1;
}
r = hdmi_write(HDMI_EDID_PAGE, HDMI_EDID_REQ_REG, 0x00);
if (r != OK) {
log_warn(&log, "Couldn't clear Read Request bit\n");
return -1;
}
log_debug(&log, "Starting polling\n");
/* poll interrupt status flag */
edid_ready = 0;
for (tries = 0; tries < 100; tries++) {
r = hdmi_read(HDMI_CTRL_PAGE, HDMI_CTRL_INT_REG, &val);
if (r != OK) {
log_warn(&log, "Read failed while polling int flag\n");
return -1;
}
if (val & HDMI_CTRL_INT_EDID_MASK) {
log_debug(&log, "Mask Set\n");
edid_ready = 1;
break;
}
micro_delay(1000);
}
if (!edid_ready) {
log_warn(&log, "Data Ready interrupt never fired.\n");
return EBUSY;
}
log_debug(&log, "Ready to read\n");
/* Finally, perform the read. */
memset(buf, '\0', count);
r = hdmi_read_block(HDMI_EDID_PAGE, HDMI_EDID_DATA_REG, buf, EDID_LEN);
if (r != OK) {
log_warn(&log, "Failed to read EDID data\n");
return -1;
}
/* Disable EDID Block Read Interrupt */
r = hdmi_clear(HDMI_CTRL_PAGE, HDMI_CTRL_INT_REG,
HDMI_CTRL_INT_EDID_MASK);
if (r != OK) {
log_warn(&log,
"Failed to disable EDID Block Read interrupt\n");
return -1;
}
r = hdmi_set(HDMI_HDCP_OTP_PAGE, HDMI_HDCP_OTP_SOME_REG,
HDMI_HDCP_OTP_SOME_MASK);
if (r != OK) {
log_warn(&log, "Failed to set bit in HDCP/OTP reg\n");
return -1;
}
log_debug(&log, "Done EDID Reading\n");
return OK;
}
static int
sef_cb_lu_state_save(int UNUSED(state))
{
ds_publish_u32("cec_bus", cec_bus, DSF_OVERWRITE);
ds_publish_u32("hdmi_bus", hdmi_bus, DSF_OVERWRITE);
ds_publish_u32("cec_address", cec_address, DSF_OVERWRITE);
ds_publish_u32("hdmi_address", hdmi_address, DSF_OVERWRITE);
return OK;
}
static int
lu_state_restore(void)
{
/* Restore the state. */
u32_t value;
ds_retrieve_u32("cec_bus", &value);
ds_delete_u32("cec_bus");
cec_bus = (int) value;
ds_retrieve_u32("hdmi_bus", &value);
ds_delete_u32("hdmi_bus");
hdmi_bus = (int) value;
ds_retrieve_u32("cec_address", &value);
ds_delete_u32("cec_address");
cec_address = (int) value;
ds_retrieve_u32("hdmi_address", &value);
ds_delete_u32("hdmi_address");
hdmi_address = (int) value;
return OK;
}
static int
sef_cb_init(int type, sef_init_info_t * UNUSED(info))
{
int r;
if (type == SEF_INIT_LU) {
/* Restore the state. */
lu_state_restore();
}
geom[TDA19988_DEV].dv_base = ((u64_t) (0));
geom[TDA19988_DEV].dv_size = ((u64_t) (128));
/*
* CEC Module
*/
/* look-up the endpoint for the bus driver */
cec_bus_endpoint = i2cdriver_bus_endpoint(cec_bus);
if (cec_bus_endpoint == 0) {
log_warn(&log, "Couldn't find bus driver.\n");
return EXIT_FAILURE;
}
/* claim the device */
r = i2cdriver_reserve_device(cec_bus_endpoint, cec_address);
if (r != OK) {
log_warn(&log, "Couldn't reserve device 0x%x (r=%d)\n",
cec_address, r);
return EXIT_FAILURE;
}
/*
* HDMI Module
*/
/* look-up the endpoint for the bus driver */
hdmi_bus_endpoint = i2cdriver_bus_endpoint(hdmi_bus);
if (hdmi_bus_endpoint == 0) {
log_warn(&log, "Couldn't find bus driver.\n");
return EXIT_FAILURE;
}
/* claim the device */
r = i2cdriver_reserve_device(hdmi_bus_endpoint, hdmi_address);
if (r != OK) {
log_warn(&log, "Couldn't reserve device 0x%x (r=%d)\n",
hdmi_address, r);
return EXIT_FAILURE;
}
if (type != SEF_INIT_LU) {
/* sign up for updates about the i2c bus going down/up */
r = i2cdriver_subscribe_bus_updates(cec_bus);
if (r != OK) {
log_warn(&log, "Couldn't subscribe to bus updates\n");
return EXIT_FAILURE;
}
/* sign up for updates about the i2c bus going down/up */
r = i2cdriver_subscribe_bus_updates(hdmi_bus);
if (r != OK) {
log_warn(&log, "Couldn't subscribe to bus updates\n");
return EXIT_FAILURE;
}
i2cdriver_announce(cec_bus);
if (cec_bus != hdmi_bus) {
i2cdriver_announce(hdmi_bus);
}
blockdriver_announce(type);
log_trace(&log, "announced\n");
}
return OK;
}
static void
sef_local_startup(void)
{
/*
* Register init callbacks. Use the same function for all event types
*/
sef_setcb_init_fresh(sef_cb_init);
sef_setcb_init_lu(sef_cb_init);
sef_setcb_init_restart(sef_cb_init);
/*
* Register live update callbacks.
*/
/* Agree to update immediately when LU is requested in a valid state. */
sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready);
/* Support live update starting from any standard state. */
sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_standard);
/* Register a custom routine to save the state. */
sef_setcb_lu_state_save(sef_cb_lu_state_save);
/* Let SEF perform startup. */
sef_startup();
}
static int
tda19988_env_parse()
{
int r;
long int cec_busl;
long int cec_addressl;
long int hdmi_busl;
long int hdmi_addressl;
r = env_parse("cec_bus", "d", 0, &cec_busl, 1, 3);
if (r != EP_SET) {
return -1;
}
cec_bus = (uint32_t) cec_busl;
r = env_parse("cec_address", "x", 0, &cec_addressl, 0x34, 0x37);
if (r != EP_SET) {
return -1;
}
cec_address = (i2c_addr_t) cec_addressl;
r = env_parse("hdmi_bus", "d", 0, &hdmi_busl, 1, 3);
if (r != EP_SET) {
return -1;
}
hdmi_bus = (uint32_t) hdmi_busl;
r = env_parse("hdmi_address", "x", 0, &hdmi_addressl, 0x70, 0x73);
if (r != EP_SET) {
return -1;
}
hdmi_address = (i2c_addr_t) hdmi_addressl;
return OK;
}
int
main(int argc, char *argv[])
{
int r;
env_setargs(argc, argv);
r = tda19988_env_parse();
if (r < 0) {
log_warn(&log,
"Expecting -args 'cec_bus=X cec_address=0xAA hdmi_bus=Y hdmi_address=0xBB'\n");
log_warn(&log,
"Example -args 'cec_bus=1 cec_address=0x34 hdmi_bus=1 hdmi_address=0x70'\n");
return EXIT_FAILURE;
}
sef_local_startup();
log_debug(&log, "Startup Complete\n");
blockdriver_task(&tda19988_tab);
log_debug(&log, "Shutting down\n");
return OK;
}
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