Differential D25118 Diff 73079 sys/dev/uart/uart_dev_ti8250.c

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sys/dev/uart/uart_dev_ti8250.c

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	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/systm.h>			#include <sys/systm.h>
	#include <sys/bus.h>			#include <sys/bus.h>
	#include <sys/conf.h>			#include <sys/conf.h>
	#include <sys/kernel.h>			#include <sys/kernel.h>
	#include <sys/sysctl.h>			#include <sys/sysctl.h>
	#include <machine/bus.h>			#include <machine/bus.h>

	#include <arm/ti/ti_prcm.h>
	#include <arm/ti/ti_hwmods.h>

	#include <dev/fdt/fdt_common.h>			#include <dev/fdt/fdt_common.h>
	#include <dev/ofw/ofw_bus.h>			#include <dev/ofw/ofw_bus.h>
	#include <dev/ofw/ofw_bus_subr.h>			#include <dev/ofw/ofw_bus_subr.h>

	#include <dev/uart/uart.h>			#include <dev/uart/uart.h>
	#include <dev/uart/uart_cpu.h>			#include <dev/uart/uart_cpu.h>
	#include <dev/uart/uart_cpu_fdt.h>			#include <dev/uart/uart_cpu_fdt.h>
	#include <dev/uart/uart_bus.h>			#include <dev/uart/uart_bus.h>
	#include <dev/uart/uart_dev_ns8250.h>			#include <dev/uart/uart_dev_ns8250.h>

				#include <arm/ti/ti_sysc.h>

	#include "uart_if.h"			#include "uart_if.h"

	/*			/*
	* High-level UART interface.			* High-level UART interface.
	*/			*/
	struct ti8250_softc {			struct ti8250_softc {
	struct ns8250_softc ns8250_base;			struct ns8250_softc ns8250_base;
	/uint32_t mystuff;/			/uint32_t mystuff;/
	};			};

	#define MDR1_REG 8			#define MDR1_REG 8
	#define MDR1_MODE_UART 0			#define MDR1_MODE_UART 0
	#define MDR1_MODE_DISABLE 7			#define MDR1_MODE_DISABLE 7
	#define SYSCC_REG 15			#define SYSCC_REG 15
	#define SYSCC_SOFTRESET (1 << 1)			#define SYSCC_SOFTRESET (1 << 1)
	#define SYSS_REG 16			#define SYSS_REG 16
	#define SYSS_STATUS_RESETDONE (1 << 0)			#define SYSS_STATUS_RESETDONE (1 << 0)

	static int			static int
	ti8250_bus_probe(struct uart_softc *sc)			ti8250_bus_probe(struct uart_softc *sc)
	{			{
	int status;			int status;
	clk_ident_t clkid;

	/* Enable clocks for this device. We can't continue if that fails. */			if ((status = ti_sysc_clock_enable(device_get_parent(sc->sc_dev))) != 0)
	clkid = ti_hwmods_get_clock(sc->sc_dev);
	if (clkid == INVALID_CLK_IDENT) {
	device_printf(sc->sc_dev,
	"failed to get clock based on hwmods\n");
	clkid = UART1_CLK + device_get_unit(sc->sc_dev);
	}
	if ((status = ti_prcm_clk_enable(clkid)) != 0)
	return (status);			return (status);

	/*			/*
	* Set the hardware to disabled mode, do a full device reset, then set			* Set the hardware to disabled mode, do a full device reset, then set
	* it to uart mode. Most devices will be reset-and-disabled already,			* it to uart mode. Most devices will be reset-and-disabled already,
	* but you never know what a bootloader might have done.			* but you never know what a bootloader might have done.
	*/			*/
	uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_DISABLE);			uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_DISABLE);
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