Author: br
Date: Mon Feb 27 20:08:42 2017
New Revision: 314362
URL: https://svnweb.freebsd.org/changeset/base/314362

Log:
  Allow setting access-width for UART registers.
  
  This is required for FDT's standard "reg-io-width" property
  (similar to "reg-shift" property) found in many DTS files.
  
  This fixes operation on Altera Arria 10 SOC Development Kit,
  where standard ns8250 uart allows 4-byte access only.
  
  Reviewed by:  kan, marcel
  Sponsored by: DARPA, AFRL
  Differential Revision:        https://reviews.freebsd.org/D9785

Modified:
  head/sys/arm/at91/uart_bus_at91usart.c
  head/sys/arm/cavium/cns11xx/uart_bus_ec.c
  head/sys/arm/nvidia/tegra_uart.c
  head/sys/arm/xscale/i8134x/uart_bus_i81342.c
  head/sys/arm/xscale/ixp425/uart_bus_ixp425.c
  head/sys/arm/xscale/pxa/uart_bus_pxa.c
  head/sys/dev/uart/uart.h
  head/sys/dev/uart/uart_bus.h
  head/sys/dev/uart/uart_bus_acpi.c
  head/sys/dev/uart/uart_bus_ebus.c
  head/sys/dev/uart/uart_bus_fdt.c
  head/sys/dev/uart/uart_bus_isa.c
  head/sys/dev/uart/uart_bus_pccard.c
  head/sys/dev/uart/uart_bus_pci.c
  head/sys/dev/uart/uart_bus_puc.c
  head/sys/dev/uart/uart_bus_scc.c
  head/sys/dev/uart/uart_core.c
  head/sys/dev/uart/uart_cpu.h
  head/sys/dev/uart/uart_cpu_arm64.c
  head/sys/dev/uart/uart_cpu_fdt.c
  head/sys/dev/uart/uart_cpu_fdt.h
  head/sys/dev/uart/uart_dev_snps.c
  head/sys/mips/adm5120/uart_bus_adm5120.c
  head/sys/mips/alchemy/uart_bus_alchemy.c
  head/sys/mips/atheros/ar531x/uart_bus_ar5315.c
  head/sys/mips/atheros/uart_bus_ar71xx.c
  head/sys/mips/atheros/uart_bus_ar933x.c
  head/sys/mips/broadcom/uart_bus_chipc.c
  head/sys/mips/cavium/uart_bus_octeonusart.c
  head/sys/mips/idt/uart_bus_rc32434.c
  head/sys/mips/ingenic/jz4780_uart.c
  head/sys/mips/malta/uart_bus_maltausart.c
  head/sys/mips/rmi/uart_bus_xlr_iodi.c
  head/sys/mips/rt305x/uart_bus_rt305x.c
  head/sys/powerpc/psim/uart_iobus.c
  head/sys/sparc64/pci/sbbc.c

Modified: head/sys/arm/at91/uart_bus_at91usart.c
==============================================================================
--- head/sys/arm/at91/uart_bus_at91usart.c      Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/arm/at91/uart_bus_at91usart.c      Mon Feb 27 20:08:42 2017        
(r314362)
@@ -104,7 +104,7 @@ usart_at91_probe(device_t dev)
        sc->sc_class = &at91_usart_class;
        if (sc->sc_class->uc_rclk == 0)
                sc->sc_class->uc_rclk = at91_master_clock;
-       return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev)));
+       return (uart_bus_probe(dev, 0, 0, 0, 0, device_get_unit(dev)));
 }
 
 

Modified: head/sys/arm/cavium/cns11xx/uart_bus_ec.c
==============================================================================
--- head/sys/arm/cavium/cns11xx/uart_bus_ec.c   Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/arm/cavium/cns11xx/uart_bus_ec.c   Mon Feb 27 20:08:42 2017        
(r314362)
@@ -69,7 +69,7 @@ uart_ec_probe(device_t dev)
 
        sc = device_get_softc(dev);
        sc->sc_class = &uart_ns8250_class;
-       status = uart_bus_probe(dev, EC_UART_REGSHIFT, EC_UART_CLOCK, 0, 0);
+       status = uart_bus_probe(dev, EC_UART_REGSHIFT, 0, EC_UART_CLOCK, 0, 0);
        return (status);
 }
 

Modified: head/sys/arm/nvidia/tegra_uart.c
==============================================================================
--- head/sys/arm/nvidia/tegra_uart.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/arm/nvidia/tegra_uart.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -216,7 +216,7 @@ tegra_uart_probe(device_t dev)
                device_printf(dev, "Cannot enable UART clock: %d\n", rv);
                return (ENXIO);
        }
-       return (uart_bus_probe(dev, shift, (int)freq, 0, 0));
+       return (uart_bus_probe(dev, shift, 0, (int)freq, 0, 0));
 }
 
 static int

Modified: head/sys/arm/xscale/i8134x/uart_bus_i81342.c
==============================================================================
--- head/sys/arm/xscale/i8134x/uart_bus_i81342.c        Mon Feb 27 19:51:27 
2017        (r314361)
+++ head/sys/arm/xscale/i8134x/uart_bus_i81342.c        Mon Feb 27 20:08:42 
2017        (r314362)
@@ -83,7 +83,7 @@ uart_i81342_probe(device_t dev)
            0x40 | 0x10);
         bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
 
-       err = uart_bus_probe(dev, 2, 33334000, 0, device_get_unit(dev));
+       err = uart_bus_probe(dev, 2, 0, 33334000, 0, device_get_unit(dev));
        sc->sc_rxfifosz = sc->sc_txfifosz = 1;
        return (err);
 }

Modified: head/sys/arm/xscale/ixp425/uart_bus_ixp425.c
==============================================================================
--- head/sys/arm/xscale/ixp425/uart_bus_ixp425.c        Mon Feb 27 19:51:27 
2017        (r314361)
+++ head/sys/arm/xscale/ixp425/uart_bus_ixp425.c        Mon Feb 27 20:08:42 
2017        (r314362)
@@ -78,5 +78,5 @@ uart_ixp425_probe(device_t dev)
        if (bootverbose)
                device_printf(dev, "rclk %u\n", rclk);
 
-       return uart_bus_probe(dev, 0, rclk, 0, 0);
+       return uart_bus_probe(dev, 0, 0, rclk, 0, 0);
 }

Modified: head/sys/arm/xscale/pxa/uart_bus_pxa.c
==============================================================================
--- head/sys/arm/xscale/pxa/uart_bus_pxa.c      Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/arm/xscale/pxa/uart_bus_pxa.c      Mon Feb 27 20:08:42 2017        
(r314362)
@@ -97,7 +97,7 @@ uart_pxa_probe(device_t dev)
        sc = device_get_softc(dev);
        sc->sc_class = &uart_ns8250_class;
 
-       return(uart_bus_probe(dev, 2, PXA2X0_COM_FREQ, 0, 0));
+       return(uart_bus_probe(dev, 2, 0, PXA2X0_COM_FREQ, 0, 0));
 }
 
 DRIVER_MODULE(uart, pxa, uart_pxa_driver, uart_devclass, 0, 0);

Modified: head/sys/dev/uart/uart.h
==============================================================================
--- head/sys/dev/uart/uart.h    Mon Feb 27 19:51:27 2017        (r314361)
+++ head/sys/dev/uart/uart.h    Mon Feb 27 20:08:42 2017        (r314362)
@@ -41,14 +41,48 @@ struct uart_bas {
        u_int   chan;
        u_int   rclk;
        u_int   regshft;
+       u_int   regiowidth;
 };
 
 #define        uart_regofs(bas, reg)           ((reg) << (bas)->regshft)
+#define        uart_regiowidth(bas)            ((bas)->regiowidth)
 
-#define        uart_getreg(bas, reg)           \
-       bus_space_read_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg))
-#define        uart_setreg(bas, reg, value)    \
-       bus_space_write_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg), value)
+static inline uint32_t
+uart_getreg(struct uart_bas *bas, int reg)
+{
+       uint32_t ret;
+
+       switch (uart_regiowidth(bas)) {
+       case 4:
+               ret = bus_space_read_4(bas->bst, bas->bsh, uart_regofs(bas, 
reg));
+               break;
+       case 2:
+               ret = bus_space_read_2(bas->bst, bas->bsh, uart_regofs(bas, 
reg));
+               break;
+       default:
+               ret = bus_space_read_1(bas->bst, bas->bsh, uart_regofs(bas, 
reg));
+               break;
+       }
+
+       return (ret);
+}
+
+static inline void
+uart_setreg(struct uart_bas *bas, int reg, int value)
+{
+
+       switch (uart_regiowidth(bas)) {
+       case 4:
+               bus_space_write_4(bas->bst, bas->bsh, uart_regofs(bas, reg), 
value);
+               break;
+       case 2:
+               bus_space_write_2(bas->bst, bas->bsh, uart_regofs(bas, reg), 
value);
+               break;
+       default:
+               bus_space_write_1(bas->bst, bas->bsh, uart_regofs(bas, reg), 
value);
+               break;
+       }
+}
 
 /*
  * XXX we don't know the length of the bus space address range in use by

Modified: head/sys/dev/uart/uart_bus.h
==============================================================================
--- head/sys/dev/uart/uart_bus.h        Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus.h        Mon Feb 27 20:08:42 2017        
(r314362)
@@ -63,6 +63,7 @@ struct uart_class {
        u_int   uc_range;               /* Bus space address range. */
        u_int   uc_rclk;                /* Default rclk for this device. */
        u_int   uc_rshift;              /* Default regshift for this device. */
+       u_int   uc_riowidth;            /* Default reg io width for this 
device. */
 };
 
 struct uart_softc {
@@ -137,7 +138,7 @@ int uart_bus_detach(device_t dev);
 int uart_bus_resume(device_t dev);
 serdev_intr_t *uart_bus_ihand(device_t dev, int ipend);
 int uart_bus_ipend(device_t dev);
-int uart_bus_probe(device_t dev, int regshft, int rclk, int rid, int chan);
+int uart_bus_probe(device_t dev, int regshft, int regiowidth, int rclk, int 
rid, int chan);
 int uart_bus_sysdev(device_t dev);
 
 void uart_sched_softih(struct uart_softc *, uint32_t);

Modified: head/sys/dev/uart/uart_bus_acpi.c
==============================================================================
--- head/sys/dev/uart/uart_bus_acpi.c   Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_acpi.c   Mon Feb 27 20:08:42 2017        
(r314362)
@@ -109,13 +109,13 @@ uart_acpi_probe(device_t dev)
 #if defined(__i386__) || defined(__amd64__)
        if (!ISA_PNP_PROBE(parent, dev, acpi_ns8250_ids)) {
                sc->sc_class = &uart_ns8250_class;
-               return (uart_bus_probe(dev, 0, 0, 0, 0));
+               return (uart_bus_probe(dev, 0, 0, 0, 0, 0));
        }
 
        /* Add checks for non-ns8250 IDs here. */
 #elif defined(__aarch64__)
        if ((sc->sc_class = uart_acpi_find_device(dev)) != NULL)
-               return (uart_bus_probe(dev, 2, 0, 0, 0));
+               return (uart_bus_probe(dev, 2, 0, 0, 0, 0));
 #endif
 
        return (ENXIO);

Modified: head/sys/dev/uart/uart_bus_ebus.c
==============================================================================
--- head/sys/dev/uart/uart_bus_ebus.c   Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_ebus.c   Mon Feb 27 20:08:42 2017        
(r314362)
@@ -97,7 +97,7 @@ uart_ebus_probe(device_t dev)
                                return (ENXIO);
                }
                sc->sc_class = &uart_ns8250_class;
-               return (uart_bus_probe(dev, 0, 0, 0, 0));
+               return (uart_bus_probe(dev, 0, 0, 0, 0, 0));
        }
 
        return (ENXIO);

Modified: head/sys/dev/uart/uart_bus_fdt.c
==============================================================================
--- head/sys/dev/uart/uart_bus_fdt.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_fdt.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -90,6 +90,15 @@ uart_fdt_get_shift(phandle_t node, pcell
        return (0);
 }
 
+int
+uart_fdt_get_io_width(phandle_t node, pcell_t *cell)
+{
+
+       if ((OF_getencprop(node, "reg-io-width", cell, sizeof(*cell))) <= 0)
+               return (-1);
+       return (0);
+}
+
 static uintptr_t
 uart_fdt_find_device(device_t dev)
 {
@@ -154,14 +163,15 @@ uart_fdt_find_by_node(phandle_t node, in
 
 int
 uart_cpu_fdt_probe(struct uart_class **classp, bus_space_tag_t *bst,
-    bus_space_handle_t *bsh, int *baud, u_int *rclk, u_int *shiftp)
+    bus_space_handle_t *bsh, int *baud, u_int *rclk, u_int *shiftp,
+    u_int *iowidthp)
 {
        const char *propnames[] = {"stdout-path", "linux,stdout-path", "stdout",
            "stdin-path", "stdin", NULL};
        const char **name;
        struct uart_class *class;
        phandle_t node, chosen;
-       pcell_t br, clk, shift;
+       pcell_t br, clk, shift, iowidth;
        char *cp;
        int err;
 
@@ -212,6 +222,9 @@ uart_cpu_fdt_probe(struct uart_class **c
        if (uart_fdt_get_shift(node, &shift) != 0)
                shift = uart_getregshift(class);
 
+       if (uart_fdt_get_io_width(node, &iowidth) != 0)
+               iowidth = uart_getregiowidth(class);
+
        if (OF_getencprop(node, "current-speed", &br, sizeof(br)) <= 0)
                br = 0;
 
@@ -223,6 +236,7 @@ uart_cpu_fdt_probe(struct uart_class **c
        *baud = br;
        *rclk = clk;
        *shiftp = shift;
+       *iowidthp = iowidth;
 
        return (0);
 }
@@ -232,7 +246,7 @@ uart_fdt_probe(device_t dev)
 {
        struct uart_softc *sc;
        phandle_t node;
-       pcell_t clock, shift;
+       pcell_t clock, shift, iowidth;
        int err;
 
        sc = device_get_softc(dev);
@@ -250,8 +264,10 @@ uart_fdt_probe(device_t dev)
                return (err);
        if (uart_fdt_get_shift(node, &shift) != 0)
                shift = uart_getregshift(sc->sc_class);
+       if (uart_fdt_get_io_width(node, &iowidth) != 0)
+               iowidth = uart_getregiowidth(sc->sc_class);
 
-       return (uart_bus_probe(dev, (int)shift, (int)clock, 0, 0));
+       return (uart_bus_probe(dev, (int)shift, (int)iowidth, (int)clock, 0, 
0));
 }
 
 DRIVER_MODULE(uart, simplebus, uart_fdt_driver, uart_devclass, 0, 0);

Modified: head/sys/dev/uart/uart_bus_isa.c
==============================================================================
--- head/sys/dev/uart/uart_bus_isa.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_isa.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -165,7 +165,7 @@ uart_isa_probe(device_t dev)
        /* Probe PnP _and_ non-PnP ns8250 here. */
        sc->sc_class = &uart_ns8250_class;
 
-       return (uart_bus_probe(dev, 0, 0, 0, 0));
+       return (uart_bus_probe(dev, 0, 0, 0, 0, 0));
 }
 
 DRIVER_MODULE(uart, isa, uart_isa_driver, uart_devclass, 0, 0);

Modified: head/sys/dev/uart/uart_bus_pccard.c
==============================================================================
--- head/sys/dev/uart/uart_bus_pccard.c Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_pccard.c Mon Feb 27 20:08:42 2017        
(r314362)
@@ -93,7 +93,7 @@ uart_pccard_attach(device_t dev)
        sc = device_get_softc(dev);
        sc->sc_class = &uart_ns8250_class;
 
-       error = uart_bus_probe(dev, 0, 0, 0, 0);
+       error = uart_bus_probe(dev, 0, 0, 0, 0, 0);
        if (error > 0)
                return (error);
        return (uart_bus_attach(dev));

Modified: head/sys/dev/uart/uart_bus_pci.c
==============================================================================
--- head/sys/dev/uart/uart_bus_pci.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_pci.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -201,7 +201,7 @@ uart_pci_probe(device_t dev)
        return (ENXIO);
 
  match:
-       result = uart_bus_probe(dev, id->regshft, id->rclk, id->rid, 0);
+       result = uart_bus_probe(dev, id->regshft, 0, id->rclk, id->rid, 0);
        /* Bail out on error. */
        if (result > 0)
                return (result);

Modified: head/sys/dev/uart/uart_bus_puc.c
==============================================================================
--- head/sys/dev/uart/uart_bus_puc.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_puc.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -81,7 +81,7 @@ uart_puc_probe(device_t dev)
 
        if (BUS_READ_IVAR(parent, dev, PUC_IVAR_CLOCK, &rclk))
                rclk = 0;
-       return (uart_bus_probe(dev, 0, rclk, 0, 0));
+       return (uart_bus_probe(dev, 0, 0, rclk, 0, 0));
 }
 
 DRIVER_MODULE(uart, puc, uart_puc_driver, uart_devclass, 0, 0);

Modified: head/sys/dev/uart/uart_bus_scc.c
==============================================================================
--- head/sys/dev/uart/uart_bus_scc.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_bus_scc.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -112,7 +112,7 @@ uart_scc_probe(device_t dev)
            BUS_READ_IVAR(parent, dev, SCC_IVAR_REGSHFT, &rs))
                return (ENXIO);
 
-       return (uart_bus_probe(dev, rs, cl, 0, ch));
+       return (uart_bus_probe(dev, rs, 0, cl, 0, ch));
 }
 
 DRIVER_MODULE(uart, scc, uart_scc_driver, uart_devclass, 0, 0);

Modified: head/sys/dev/uart/uart_core.c
==============================================================================
--- head/sys/dev/uart/uart_core.c       Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_core.c       Mon Feb 27 20:08:42 2017        
(r314362)
@@ -256,6 +256,12 @@ uart_getregshift(struct uart_class *uc)
        return ((uc != NULL) ? uc->uc_rshift : 0);
 }
 
+u_int
+uart_getregiowidth(struct uart_class *uc)
+{
+       return ((uc != NULL) ? uc->uc_riowidth : 0);
+}
+
 /*
  * Schedule a soft interrupt. We do this on the 0 to !0 transition
  * of the TTY pending interrupt status.
@@ -485,7 +491,7 @@ uart_bus_sysdev(device_t dev)
 }
 
 int
-uart_bus_probe(device_t dev, int regshft, int rclk, int rid, int chan)
+uart_bus_probe(device_t dev, int regshft, int regiowidth, int rclk, int rid, 
int chan)
 {
        struct uart_softc *sc;
        struct uart_devinfo *sysdev;
@@ -543,6 +549,7 @@ uart_bus_probe(device_t dev, int regshft
        sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
        sc->sc_bas.chan = chan;
        sc->sc_bas.regshft = regshft;
+       sc->sc_bas.regiowidth = regiowidth;
        sc->sc_bas.rclk = (rclk == 0) ? sc->sc_class->uc_rclk : rclk;
 
        SLIST_FOREACH(sysdev, &uart_sysdevs, next) {

Modified: head/sys/dev/uart/uart_cpu.h
==============================================================================
--- head/sys/dev/uart/uart_cpu.h        Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_cpu.h        Mon Feb 27 20:08:42 2017        
(r314362)
@@ -80,6 +80,7 @@ const char *uart_getname(struct uart_cla
 struct uart_ops *uart_getops(struct uart_class *);
 int uart_getrange(struct uart_class *);
 u_int uart_getregshift(struct uart_class *);
+u_int uart_getregiowidth(struct uart_class *);
 
 void uart_add_sysdev(struct uart_devinfo *);
 

Modified: head/sys/dev/uart/uart_cpu_arm64.c
==============================================================================
--- head/sys/dev/uart/uart_cpu_arm64.c  Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_cpu_arm64.c  Mon Feb 27 20:08:42 2017        
(r314362)
@@ -155,7 +155,7 @@ uart_cpu_getdev(int devtype, struct uart
        struct uart_class *class;
        bus_space_handle_t bsh;
        bus_space_tag_t bst;
-       u_int rclk, shift;
+       u_int rclk, shift, iowidth;
        int br, err;
 
        /* Allow overriding the FDT using the environment. */
@@ -174,7 +174,7 @@ uart_cpu_getdev(int devtype, struct uart
 #ifdef FDT
        if (err != 0) {
                err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk,
-                   &shift);
+                   &shift, &iowidth);
        }
 #endif
        if (err != 0)
@@ -185,6 +185,7 @@ uart_cpu_getdev(int devtype, struct uart
         */
        di->bas.chan = 0;
        di->bas.regshft = shift;
+       di->bas.regiowidth = iowidth;
        di->baudrate = br;
        di->bas.rclk = rclk;
        di->ops = uart_getops(class);

Modified: head/sys/dev/uart/uart_cpu_fdt.c
==============================================================================
--- head/sys/dev/uart/uart_cpu_fdt.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_cpu_fdt.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -76,7 +76,7 @@ uart_cpu_getdev(int devtype, struct uart
        struct uart_class *class;
        bus_space_tag_t bst;
        bus_space_handle_t bsh;
-       u_int shift, rclk;
+       u_int shift, iowidth, rclk;
        int br, err;
 
        /* Allow overriding the FDT using the environment. */
@@ -88,7 +88,7 @@ uart_cpu_getdev(int devtype, struct uart
        if (devtype != UART_DEV_CONSOLE)
                return (ENXIO);
 
-       err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, &shift);
+       err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, &shift, 
&iowidth);
        if (err != 0)
                return (err);
 
@@ -97,6 +97,7 @@ uart_cpu_getdev(int devtype, struct uart
         */
        di->bas.chan = 0;
        di->bas.regshft = shift;
+       di->bas.regiowidth = iowidth;
        di->baudrate = br;
        di->bas.rclk = rclk;
        di->ops = uart_getops(class);

Modified: head/sys/dev/uart/uart_cpu_fdt.h
==============================================================================
--- head/sys/dev/uart/uart_cpu_fdt.h    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_cpu_fdt.h    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -51,8 +51,9 @@ SET_DECLARE(uart_fdt_class_set, struct o
        DATA_SET(uart_fdt_class_set, data)
 
 int uart_cpu_fdt_probe(struct uart_class **, bus_space_tag_t *,
-    bus_space_handle_t *, int *, u_int *, u_int *);
+    bus_space_handle_t *, int *, u_int *, u_int *, u_int *);
 int uart_fdt_get_clock(phandle_t node, pcell_t *cell);
 int uart_fdt_get_shift(phandle_t node, pcell_t *cell);
+int uart_fdt_get_io_width(phandle_t node, pcell_t *cell);
 
 #endif /* _DEV_UART_CPU_FDT_H_ */

Modified: head/sys/dev/uart/uart_dev_snps.c
==============================================================================
--- head/sys/dev/uart/uart_dev_snps.c   Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/dev/uart/uart_dev_snps.c   Mon Feb 27 20:08:42 2017        
(r314362)
@@ -136,7 +136,7 @@ snps_probe(device_t dev)
        struct snps_softc *sc;
        struct uart_class *uart_class;
        phandle_t node;
-       uint32_t shift, clock;
+       uint32_t shift, iowidth, clock;
        uint64_t freq;
        int error;
 #ifdef EXT_RESOURCES
@@ -159,6 +159,8 @@ snps_probe(device_t dev)
        node = ofw_bus_get_node(dev);
        if (OF_getencprop(node, "reg-shift", &shift, sizeof(shift)) <= 0)
                shift = 0;
+       if (OF_getencprop(node, "reg-io-width", &iowidth, sizeof(iowidth)) <= 0)
+               iowidth = 1;
        if (OF_getencprop(node, "clock-frequency", &clock, sizeof(clock)) <= 0)
                clock = 0;
 
@@ -200,7 +202,7 @@ snps_probe(device_t dev)
        if (bootverbose && clock == 0)
                device_printf(dev, "could not determine frequency\n");
 
-       error = uart_bus_probe(dev, (int)shift, (int)clock, 0, 0);
+       error = uart_bus_probe(dev, (int)shift, (int)iowidth, (int)clock, 0, 0);
        if (error != 0)
                return (error);
 

Modified: head/sys/mips/adm5120/uart_bus_adm5120.c
==============================================================================
--- head/sys/mips/adm5120/uart_bus_adm5120.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/adm5120/uart_bus_adm5120.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -87,7 +87,7 @@ uart_adm5120_probe(device_t dev)
        sc->sc_class = &uart_adm5120_uart_class;
        bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
 
-       return (uart_bus_probe(dev, 0, 0, 0, 0));
+       return (uart_bus_probe(dev, 0, 0, 0, 0, 0));
 }
 
 DRIVER_MODULE(uart, obio, uart_adm5120_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/alchemy/uart_bus_alchemy.c
==============================================================================
--- head/sys/mips/alchemy/uart_bus_alchemy.c    Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/alchemy/uart_bus_alchemy.c    Mon Feb 27 20:08:42 2017        
(r314362)
@@ -81,7 +81,7 @@ uart_alchemy_probe(device_t dev)
        sc->sc_class = &uart_ns8250_class;
        bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
 
-       return (uart_bus_probe(dev, 0, 0, 0, 0));
+       return (uart_bus_probe(dev, 0, 0, 0, 0, 0));
 }
 
 DRIVER_MODULE(uart, obio, uart_alchemy_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/atheros/ar531x/uart_bus_ar5315.c
==============================================================================
--- head/sys/mips/atheros/ar531x/uart_bus_ar5315.c      Mon Feb 27 19:51:27 
2017        (r314361)
+++ head/sys/mips/atheros/ar531x/uart_bus_ar5315.c      Mon Feb 27 20:08:42 
2017        (r314362)
@@ -83,7 +83,7 @@ uart_ar5315_probe(device_t dev)
        sc->sc_bas.bst = mips_bus_space_generic;
        sc->sc_bas.bsh = ar531x_uart_addr() + 3;
 
-       return (uart_bus_probe(dev, 2, freq, 0, 0));
+       return (uart_bus_probe(dev, 2, 0, freq, 0, 0));
 }
 
 DRIVER_MODULE(uart, apb, uart_ar5315_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/atheros/uart_bus_ar71xx.c
==============================================================================
--- head/sys/mips/atheros/uart_bus_ar71xx.c     Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/atheros/uart_bus_ar71xx.c     Mon Feb 27 20:08:42 2017        
(r314362)
@@ -83,7 +83,7 @@ uart_ar71xx_probe(device_t dev)
        sc->sc_bas.bst = mips_bus_space_generic;
        sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR) + 3;
 
-       return (uart_bus_probe(dev, 2, freq, 0, 0));
+       return (uart_bus_probe(dev, 2, 0, freq, 0, 0));
 }
 
 #ifdef EARLY_PRINTF

Modified: head/sys/mips/atheros/uart_bus_ar933x.c
==============================================================================
--- head/sys/mips/atheros/uart_bus_ar933x.c     Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/atheros/uart_bus_ar933x.c     Mon Feb 27 20:08:42 2017        
(r314362)
@@ -88,7 +88,7 @@ uart_ar933x_probe(device_t dev)
        sc->sc_bas.bst = mips_bus_space_generic;
        sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR);
 
-       return (uart_bus_probe(dev, 2, freq, 0, 0));
+       return (uart_bus_probe(dev, 2, 0, freq, 0, 0));
 }
 
 /*

Modified: head/sys/mips/broadcom/uart_bus_chipc.c
==============================================================================
--- head/sys/mips/broadcom/uart_bus_chipc.c     Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/broadcom/uart_bus_chipc.c     Mon Feb 27 20:08:42 2017        
(r314362)
@@ -61,7 +61,7 @@ uart_chipc_probe(device_t dev)
        sc->sc_class = &uart_ns8250_class;
 
        rclk = bcm_get_uart_rclk(bcm_get_platform());
-       return (uart_bus_probe(dev, 0, rclk, 0, 0));
+       return (uart_bus_probe(dev, 0, 0, rclk, 0, 0));
 }
 
 static device_method_t uart_chipc_methods[] = {

Modified: head/sys/mips/cavium/uart_bus_octeonusart.c
==============================================================================
--- head/sys/mips/cavium/uart_bus_octeonusart.c Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/cavium/uart_bus_octeonusart.c Mon Feb 27 20:08:42 2017        
(r314362)
@@ -105,7 +105,7 @@ uart_octeon_probe(device_t dev)
        if (bus_space_map(sc->sc_bas.bst, CVMX_MIO_UARTX_RBR(0),
            uart_getrange(sc->sc_class), 0, &sc->sc_bas.bsh) != 0)
                return (ENXIO);
-       return (uart_bus_probe(dev, sc->sc_bas.regshft, 0, 0, unit));
+       return (uart_bus_probe(dev, sc->sc_bas.regshft, 0, 0, 0, unit));
 }
 
 DRIVER_MODULE(uart, obio, uart_octeon_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/idt/uart_bus_rc32434.c
==============================================================================
--- head/sys/mips/idt/uart_bus_rc32434.c        Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/idt/uart_bus_rc32434.c        Mon Feb 27 20:08:42 2017        
(r314362)
@@ -94,7 +94,7 @@ uart_rc32434_probe(device_t dev)
        sc->sc_bas.bst = mips_bus_space_generic;
        sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(IDT_BASE_UART0);
 
-       return (uart_bus_probe(dev, 2, 330000000UL/2, 0, 0));
+       return (uart_bus_probe(dev, 2, 0, 330000000UL/2, 0, 0));
 }
 
 DRIVER_MODULE(uart, obio, uart_rc32434_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/ingenic/jz4780_uart.c
==============================================================================
--- head/sys/mips/ingenic/jz4780_uart.c Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/ingenic/jz4780_uart.c Mon Feb 27 20:08:42 2017        
(r314362)
@@ -179,7 +179,7 @@ jz4780_uart_probe(device_t dev)
                device_printf(dev, "got UART clock: %lld\n", freq);
        sc->ns8250_base.base.sc_class = (struct uart_class *)cd->ocd_data;
        shift = jz4780_uart_get_shift(dev);
-       return (uart_bus_probe(dev, shift, (int)freq, 0, 0));
+       return (uart_bus_probe(dev, shift, 0, (int)freq, 0, 0));
 }
 
 static int

Modified: head/sys/mips/malta/uart_bus_maltausart.c
==============================================================================
--- head/sys/mips/malta/uart_bus_maltausart.c   Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/malta/uart_bus_maltausart.c   Mon Feb 27 20:08:42 2017        
(r314362)
@@ -85,7 +85,7 @@ uart_malta_probe(device_t dev)
        sc->sc_sysdev->bas.bsh = MIPS_PHYS_TO_KSEG1(MALTA_UART0ADR);
        sc->sc_bas.bst = mips_bus_space_generic;
        sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(MALTA_UART0ADR);
-       return(uart_bus_probe(dev, 0, 0, 0, 0));
+       return(uart_bus_probe(dev, 0, 0, 0, 0, 0));
 }
 
 DRIVER_MODULE(uart, obio, uart_malta_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/rmi/uart_bus_xlr_iodi.c
==============================================================================
--- head/sys/mips/rmi/uart_bus_xlr_iodi.c       Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/rmi/uart_bus_xlr_iodi.c       Mon Feb 27 20:08:42 2017        
(r314362)
@@ -74,7 +74,7 @@ uart_iodi_probe(device_t dev)
        sc->sc_bas.bst = rmi_bus_space;
        sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(XLR_UART0ADDR);
        /* regshft = 2, rclk = 66000000, rid = 0, chan = 0 */
-       return (uart_bus_probe(dev, 2, 66000000, 0, 0));
+       return (uart_bus_probe(dev, 2, 0, 66000000, 0, 0));
 }
 
 DRIVER_MODULE(uart, iodi, uart_iodi_driver, uart_devclass, 0, 0);

Modified: head/sys/mips/rt305x/uart_bus_rt305x.c
==============================================================================
--- head/sys/mips/rt305x/uart_bus_rt305x.c      Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/mips/rt305x/uart_bus_rt305x.c      Mon Feb 27 20:08:42 2017        
(r314362)
@@ -87,7 +87,7 @@ uart_rt305x_probe(device_t dev)
        sc->sc_bas.bsh = 
            MIPS_PHYS_TO_KSEG1(device_get_unit(dev)?UARTLITE_BASE:UART_BASE);
 
-       return (uart_bus_probe(dev, 2, SYSTEM_CLOCK, 0, 0));
+       return (uart_bus_probe(dev, 2, 0, SYSTEM_CLOCK, 0, 0));
 }
 
 DRIVER_MODULE(uart, obio, uart_rt305x_driver, uart_devclass, 0, 0);

Modified: head/sys/powerpc/psim/uart_iobus.c
==============================================================================
--- head/sys/powerpc/psim/uart_iobus.c  Mon Feb 27 19:51:27 2017        
(r314361)
+++ head/sys/powerpc/psim/uart_iobus.c  Mon Feb 27 20:08:42 2017        
(r314362)
@@ -81,7 +81,7 @@ uart_iobus_probe(device_t dev)
        sc->sc_class = &uart_ns8250_class;
 
        device_set_desc(dev, "PSIM serial port");
-       return (uart_bus_probe(dev, 0, 0, 0, 0));
+       return (uart_bus_probe(dev, 0, 0, 0, 0, 0));
 }
 
 DRIVER_MODULE(uart, iobus, uart_iobus_driver, uart_devclass, 0, 0);

Modified: head/sys/sparc64/pci/sbbc.c
==============================================================================
--- head/sys/sparc64/pci/sbbc.c Mon Feb 27 19:51:27 2017        (r314361)
+++ head/sys/sparc64/pci/sbbc.c Mon Feb 27 20:08:42 2017        (r314362)
@@ -618,7 +618,7 @@ sbbc_uart_sbbc_probe(device_t dev)
        sc = device_get_softc(dev);
        sc->sc_class = &uart_sbbc_class;
        device_set_desc(dev, "Serengeti console");
-       return (uart_bus_probe(dev, 0, 0, SBBC_PCI_BAR, 0));
+       return (uart_bus_probe(dev, 0, 0, 0, SBBC_PCI_BAR, 0));
 }
 
 /*
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