void lcd_init_device(void)
{
semaphore_init(&g_wait_sema, 1, 0);
/* I'm not really sure this pin is related to power, it does not seem to do anything */
imx233_pinctrl_acquire(1, 8, "lcd_power");
imx233_pinctrl_acquire(1, 9, "lcd_spi_sdo");
imx233_pinctrl_acquire(1, 10, "lcd_spi_scl");
imx233_pinctrl_acquire(1, 11, "lcd_spi_cs");
imx233_pinctrl_set_function(1, 9, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_set_function(1, 10, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_set_function(1, 11, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_set_function(1, 8, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(1, 8, true);
/** lcd is 320x240, data bus is 8-bit, depth is 24-bit so we need 3clk/pix
* by running PIX clock at 24MHz we can sustain ~100 fps */
imx233_clkctrl_enable(CLK_PIX, false);
imx233_clkctrl_set_div(CLK_PIX, 2);
imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */
imx233_clkctrl_enable(CLK_PIX, true);
imx233_lcdif_init();
imx233_lcdif_setup_dotclk_pins(8, false);
imx233_lcdif_set_word_length(8);
imx233_lcdif_set_underflow_cb(&lcd_underflow);
imx233_lcdif_enable_underflow_irq(true);
imx233_dma_clkgate_channel(APB_LCDIF, true);
imx233_dma_reset_channel(APB_LCDIF);
/** Datasheet states:
* 257H >= VBP >= 3H, VBP > VLW, VFP >= 1H
* 1533clk >= HBP >= 24clk, HBP > HLW, HFP >= 4clk
*
* Take VLW=1H, VBP=3H, VFP=1H, HLW=8, HBP=24, HFP=4
* Take 3clk/pix because we send 24-bit/pix with 8-bit data bus
* Keep consistent with register setting in lcd_init_seq
*/
imx233_lcdif_setup_dotclk_ex(/*v_pulse_width*/1, /*v_back_porch*/3,
/*v_front_porch*/1, /*h_pulse_width*/8, /*h_back_porch*/24,
/*h_front_porch*/4, LCD_WIDTH, LCD_HEIGHT, /*clk_per_pix*/3,
/*enable_present*/false);
imx233_lcdif_set_byte_packing_format(0xf);
imx233_lcdif_enable_sync_signals(true); // we need frame signals during init
// setup dma
unsigned size = IMX233_FRAMEBUFFER_SIZE;
uint8_t *frame_p = FRAME;
for(int i = 0; i < NR_CMDS; i++)
{
unsigned xfer = MIN(IMX233_MAX_SINGLE_DMA_XFER_SIZE, size);
lcdif_dma[i].dma.next = &lcdif_dma[(i + 1) % NR_CMDS].dma;
lcdif_dma[i].dma.cmd = BF_OR3(APB_CHx_CMD, CHAIN(1),
COMMAND(BV_APB_CHx_CMD_COMMAND__READ), XFER_COUNT(xfer));
lcdif_dma[i].dma.buffer = frame_p;
size -= xfer;
frame_p += xfer;
}
// first transfer: enable run, dotclk and so on
lcdif_dma[0].dma.cmd |= BF_OR1(APB_CHx_CMD, CMDWORDS(1));
lcdif_dma[0].ctrl = BF_OR4(LCDIF_CTRL, BYPASS_COUNT(1), DOTCLK_MODE(1),
RUN(1), WORD_LENGTH(1));
// enable
lcd_enable(true);
}
static void
do_reload(void)
{
int e = 0;
drivers_unload_all(); /* Close all drivers */
config_clear();
clear_settings();
/* Reread command line*/
CHAIN(e, process_command_line(stored_argc, stored_argv));
/* Reread config file */
if (strcmp(configfile, UNSET_STR)==0)
strncpy(configfile, DEFAULT_CONFIGFILE, sizeof(configfile));
CHAIN(e, process_configfile(configfile));
/* Set default values */
CHAIN(e, (set_default_settings(), 0));
/* Set reporting values */
CHAIN(e, set_reporting("LCDd", report_level, report_dest));
CHAIN(e, (report(RPT_INFO, "Set report level to %d, output to %s", report_level,
((report_dest == RPT_DEST_SYSLOG) ? "syslog" : "stderr")), 0));
/* And restart the drivers */
CHAIN(e, init_drivers());
CHAIN_END(e, "Critical error while reloading, abort.");
}
int
main(int argc, char **argv)
{
int e = 0;
pid_t parent_pid = 0;
stored_argc = argc;
stored_argv = argv;
/*
* Settings in order of preference:
*
* 1: Settings specified in command line options...
* 2: Settings specified in configuration file...
* 3: Default settings
*
* Because of this, and because one option (-c) specifies where
* the configuration file is, things are done in this order:
*
* 1. Read and set options.
* 2. Read configuration file; if option is read in configuration
* file and not already set, then set it.
* 3. Having read configuration file, if parameter is not set,
* set it to the default value.
*
* It is for this reason that the default values are **NOT** set
* in the variable declaration...
*/
/* Report that server is starting (report will be delayed) */
report(RPT_NOTICE, "LCDd version %s starting", version);
report(RPT_INFO, "Built on %s, protocol version %s, API version %s",
build_date, protocol_version, api_version);
clear_settings();
/* Read command line*/
CHAIN(e, process_command_line(argc, argv));
/* Read config file
* If config file was not given on command line use default */
if (strcmp(configfile, UNSET_STR) == 0)
strncpy(configfile, DEFAULT_CONFIGFILE, sizeof(configfile));
CHAIN(e, process_configfile(configfile));
/* Set default values*/
set_default_settings();
/* Set reporting settings (will also flush delayed reports) */
set_reporting("LCDd", report_level, report_dest);
report(RPT_INFO, "Set report level to %d, output to %s", report_level,
((report_dest == RPT_DEST_SYSLOG) ? "syslog" : "stderr"));
CHAIN_END(e, "Critical error while processing settings, abort.");
/* Now, go into daemon mode (if we should)...
* We wait for the child to report it is running OK. This mechanism
* is used because forking after starting the drivers causes the
* child to loose the (LPT) port access. */
if (!foreground_mode) {
report(RPT_INFO, "Server forking to background");
CHAIN(e, parent_pid = daemonize());
} else {
output_GPL_notice();
report(RPT_INFO, "Server running in foreground");
}
install_signal_handlers(!foreground_mode);
/* Only catch SIGHUP if not in foreground mode */
/* Startup the subparts of the server */
CHAIN(e, sock_init(bind_addr, bind_port));
CHAIN(e, screenlist_init());
CHAIN(e, init_drivers());
CHAIN(e, clients_init());
CHAIN(e, input_init());
CHAIN(e, menuscreens_init());
CHAIN(e, server_screen_init());
CHAIN_END(e, "Critical error while initializing, abort.");
if (!foreground_mode) {
/* Tell to parent that startup went OK. */
wave_to_parent(parent_pid);
}
drop_privs(user); /* This can't be done before, because sending a
signal to a process of a different user will fail */
do_mainloop();
/* This loop never stops; we'll get out only with a signal...*/
return 0;
}