diff options
Diffstat (limited to 'arch/arc/plat-arcfpga/platform.c')
| -rw-r--r-- | arch/arc/plat-arcfpga/platform.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c index 7b5dcab5becb..5388b31e2ead 100644 --- a/arch/arc/plat-arcfpga/platform.c +++ b/arch/arc/plat-arcfpga/platform.c @@ -10,7 +10,102 @@ #include <linux/types.h> #include <linux/init.h> +#include <linux/device.h> #include <linux/platform_device.h> +#include <linux/console.h> +#include <asm/setup.h> +#include <asm/irq.h> +#include <asm/clk.h> +#include <plat/memmap.h> + +/*----------------------- Platform Devices -----------------------------*/ + +#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE) + +static unsigned long arc_uart_info[] = { + CONFIG_ARC_SERIAL_BAUD, /* uart->baud */ + -1, /* uart->port.uartclk */ + -1, /* uart->is_emulated (runtime @running_on_hw) */ + 0 +}; + +#define ARC_UART_DEV(n) \ + \ +static struct resource arc_uart##n##_res[] = { \ + { \ + .start = UART##n##_BASE, \ + .end = UART##n##_BASE + 0xFF, \ + .flags = IORESOURCE_MEM, \ + }, \ + { \ + .start = UART##n##_IRQ, \ + .end = UART##n##_IRQ, \ + .flags = IORESOURCE_IRQ, \ + }, \ +}; \ + \ +static struct platform_device arc_uart##n##_dev = { \ + .name = "arc-uart", \ + .id = n, \ + .num_resources = ARRAY_SIZE(arc_uart##n##_res), \ + .resource = arc_uart##n##_res, \ + .dev = { \ + .platform_data = &arc_uart_info, \ + }, \ +} + +ARC_UART_DEV(0); +#if CONFIG_SERIAL_ARC_NR_PORTS > 1 +ARC_UART_DEV(1); +#endif + +static struct platform_device *fpga_early_devs[] __initdata = { +#if defined(CONFIG_SERIAL_ARC_CONSOLE) + &arc_uart0_dev, +#endif +}; + +static void arc_fpga_serial_init(void) +{ + arc_uart_info[1] = arc_get_core_freq(); + + /* To let driver workaround ISS bug: baudh Reg can't be set to 0 */ + arc_uart_info[2] = !running_on_hw; + + early_platform_add_devices(fpga_early_devs, + ARRAY_SIZE(fpga_early_devs)); + + /* + * ARC console driver registers itself as an early platform driver + * of class "earlyprintk". + * Install it here, followed by probe of devices. + * The installation here doesn't require earlyprintk in command line + * To do so however, replace the lines below with + * parse_early_param(); + * early_platform_driver_probe("earlyprintk", 1, 1); + * ^^ + */ + early_platform_driver_register_all("earlyprintk"); + early_platform_driver_probe("earlyprintk", 1, 0); + + /* + * This is to make sure that arc uart would be preferred console + * despite one/more of following: + * -command line lacked "console=ttyARC0" or + * -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever) + * Note that this needs to be done after above early console is reg, + * otherwise the early console never gets a chance to run. + */ + add_preferred_console("ttyARC", 0, "115200"); +} + +#else + +static void arc_fpga_serial_init(void) +{ +} + +#endif /* CONFIG_SERIAL_ARC */ /* * Early Platform Initialization called from setup_arch() @@ -18,12 +113,25 @@ void __init arc_platform_early_init(void) { pr_info("[plat-arcfpga]: registering early dev resources\n"); + + arc_fpga_serial_init(); } +static struct platform_device *fpga_devs[] __initdata = { +#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE) + &arc_uart0_dev, +#if CONFIG_SERIAL_ARC_NR_PORTS > 1 + &arc_uart1_dev, +#endif +#endif +}; + int __init fpga_plat_init(void) { pr_info("[plat-arcfpga]: registering device resources\n"); + platform_add_devices(fpga_devs, ARRAY_SIZE(fpga_devs)); + return 0; } arch_initcall(fpga_plat_init); |