Differential D14515 Diff 39826 head/sys/dev/uart/uart_dev_pl011.c

Changeset View

Standalone View

head/sys/dev/uart/uart_dev_pl011.c

Show All 30 Lines

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

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

#include <machine/bus.h>		#include <machine/bus.h>
		#include <machine/machdep.h>

#include <dev/uart/uart.h>		#include <dev/uart/uart.h>
#include <dev/uart/uart_cpu.h>		#include <dev/uart/uart_cpu.h>
#ifdef FDT		#ifdef FDT
#include <dev/uart/uart_cpu_fdt.h>		#include <dev/uart/uart_cpu_fdt.h>
#include <dev/ofw/ofw_bus.h>		#include <dev/ofw/ofw_bus.h>
#endif		#endif
#include <dev/uart/uart_bus.h>		#include <dev/uart/uart_bus.h>
#include "uart_if.h"		#include "uart_if.h"

#ifdef DEV_ACPI		#ifdef DEV_ACPI
#include <dev/uart/uart_cpu_acpi.h>		#include <dev/uart/uart_cpu_acpi.h>
#include <contrib/dev/acpica/include/acpi.h>		#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>		#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/actables.h>		#include <contrib/dev/acpica/include/actables.h>
#endif		#endif

#include <sys/kdb.h>		#include <sys/kdb.h>

		#ifdef __aarch64__
		#define IS_FDT (arm64_bus_method == ARM64_BUS_FDT)
		#elif defined(FDT)
		#define IS_FDT 1
		#else
		#error Unsupported configuration
		#endif

/* PL011 UART registers and masks*/		/* PL011 UART registers and masks*/
#define UART_DR 0x00 /* Data register */		#define UART_DR 0x00 /* Data register */
#define DR_FE (1 << 8) /* Framing error */		#define DR_FE (1 << 8) /* Framing error */
#define DR_PE (1 << 9) /* Parity error */		#define DR_PE (1 << 9) /* Parity error */
#define DR_BE (1 << 10) /* Break error */		#define DR_BE (1 << 10) /* Break error */
#define DR_OE (1 << 11) /* Overrun error */		#define DR_OE (1 << 11) /* Overrun error */

#define UART_FR 0x06 /* Flag register */		#define UART_FR 0x06 /* Flag register */
▲ Show 20 Lines • Show All 375 Lines • ▼ Show 20 Lines	uart_pl011_bus_param(struct uart_softc *sc, int baudrate, int databits,

uart_lock(sc->sc_hwmtx);		uart_lock(sc->sc_hwmtx);
uart_pl011_param(&sc->sc_bas, baudrate, databits, stopbits, parity);		uart_pl011_param(&sc->sc_bas, baudrate, databits, stopbits, parity);
uart_unlock(sc->sc_hwmtx);		uart_unlock(sc->sc_hwmtx);

return (0);		return (0);
}		}

		#ifdef FDT
static int		static int
uart_pl011_bus_probe(struct uart_softc *sc)		uart_pl011_bus_hwrev_fdt(struct uart_softc *sc)
{		{
uint8_t hwrev;
#ifdef FDT
pcell_t node;		pcell_t node;
uint32_t periphid;		uint32_t periphid;

/*		/*
* The FIFO sizes vary depending on hardware; rev 2 and below have 16		* The FIFO sizes vary depending on hardware; rev 2 and below have 16
* byte FIFOs, rev 3 and up are 32 byte. The hardware rev is in the		* byte FIFOs, rev 3 and up are 32 byte. The hardware rev is in the
* primecell periphid register, but we get a bit of drama, as always,		* primecell periphid register, but we get a bit of drama, as always,
* with the bcm2835 (rpi), which claims to be rev 3, but has 16 byte		* with the bcm2835 (rpi), which claims to be rev 3, but has 16 byte
* FIFOs. We check for both the old freebsd-historic and the proper		* FIFOs. We check for both the old freebsd-historic and the proper
* bindings-defined compatible strings for bcm2835, and also check the		* bindings-defined compatible strings for bcm2835, and also check the
* workaround the linux drivers use for rpi3, which is to override the		* workaround the linux drivers use for rpi3, which is to override the
* primecell periphid register value with a property.		* primecell periphid register value with a property.
*/		*/
if (ofw_bus_is_compatible(sc->sc_dev, "brcm,bcm2835-pl011") \|\|		if (ofw_bus_is_compatible(sc->sc_dev, "brcm,bcm2835-pl011") \|\|
ofw_bus_is_compatible(sc->sc_dev, "broadcom,bcm2835-uart")) {		ofw_bus_is_compatible(sc->sc_dev, "broadcom,bcm2835-uart")) {
hwrev = 2;		return (2);
} else {		} else {
node = ofw_bus_get_node(sc->sc_dev);		node = ofw_bus_get_node(sc->sc_dev);
if (OF_getencprop(node, "arm,primecell-periphid", &periphid,		if (OF_getencprop(node, "arm,primecell-periphid", &periphid,
sizeof(periphid)) > 0) {		sizeof(periphid)) > 0) {
hwrev = (periphid >> 20) & 0x0f;		return ((periphid >> 20) & 0x0f);
} else {
hwrev = __uart_getreg(&sc->sc_bas, UART_PIDREG_2) >> 4;
}		}
}		}
#else
hwrev = __uart_getreg(&sc->sc_bas, UART_PIDREG_2) >> 4;		return (-1);
		}
#endif		#endif

		static int
		uart_pl011_bus_probe(struct uart_softc *sc)
		{
		int hwrev;

		hwrev = -1;
		#ifdef FDT
		if (IS_FDT)
		hwrev = uart_pl011_bus_hwrev_fdt(sc);
		#endif
		if (hwrev < 0)
		hwrev = __uart_getreg(&sc->sc_bas, UART_PIDREG_2) >> 4;

if (hwrev <= 2) {		if (hwrev <= 2) {
sc->sc_rxfifosz = FIFO_RX_SIZE_R2;		sc->sc_rxfifosz = FIFO_RX_SIZE_R2;
sc->sc_txfifosz = FIFO_TX_SIZE_R2;		sc->sc_txfifosz = FIFO_TX_SIZE_R2;
} else {		} else {
sc->sc_rxfifosz = FIFO_RX_SIZE_R3;		sc->sc_rxfifosz = FIFO_RX_SIZE_R3;
sc->sc_txfifosz = FIFO_TX_SIZE_R3;		sc->sc_txfifosz = FIFO_TX_SIZE_R3;
}		}

▲ Show 20 Lines • Show All 101 Lines • Show Last 20 Lines