Author: andrew Date: Wed Jul 20 17:19:47 2016 New Revision: 303100 URL: https://svnweb.freebsd.org/changeset/base/303100
Log: We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262 Modified: head/sys/dev/uart/uart_bus_fdt.c head/sys/dev/uart/uart_cpu_fdt.c head/sys/dev/uart/uart_cpu_fdt.h Modified: head/sys/dev/uart/uart_bus_fdt.c ============================================================================== --- head/sys/dev/uart/uart_bus_fdt.c Wed Jul 20 16:59:36 2016 (r303099) +++ head/sys/dev/uart/uart_bus_fdt.c Wed Jul 20 17:19:47 2016 (r303100) @@ -105,6 +105,129 @@ uart_fdt_find_device(device_t dev) } static int +phandle_chosen_propdev(phandle_t chosen, const char *name, phandle_t *node) +{ + char buf[64]; + + if (OF_getprop(chosen, name, buf, sizeof(buf)) <= 0) + return (ENXIO); + if ((*node = OF_finddevice(buf)) == -1) + return (ENXIO); + + return (0); +} + +static const struct ofw_compat_data * +uart_fdt_find_compatible(phandle_t node, const struct ofw_compat_data *cd) +{ + const struct ofw_compat_data *ocd; + + for (ocd = cd; ocd->ocd_str != NULL; ocd++) { + if (fdt_is_compatible(node, ocd->ocd_str)) + return (ocd); + } + return (NULL); +} + +static uintptr_t +uart_fdt_find_by_node(phandle_t node, int class_list) +{ + struct ofw_compat_data **cd; + const struct ofw_compat_data *ocd; + + if (class_list) { + SET_FOREACH(cd, uart_fdt_class_set) { + ocd = uart_fdt_find_compatible(node, *cd); + if ((ocd != NULL) && (ocd->ocd_data != 0)) + return (ocd->ocd_data); + } + } else { + SET_FOREACH(cd, uart_fdt_class_and_device_set) { + ocd = uart_fdt_find_compatible(node, *cd); + if ((ocd != NULL) && (ocd->ocd_data != 0)) + return (ocd->ocd_data); + } + } + + return (0); +} + +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) +{ + 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; + char *cp; + int err; + + /* Has the user forced a specific device node? */ + cp = kern_getenv("hw.fdt.console"); + if (cp == NULL) { + /* + * Retrieve /chosen/std{in,out}. + */ + node = -1; + if ((chosen = OF_finddevice("/chosen")) != -1) { + for (name = propnames; *name != NULL; name++) { + if (phandle_chosen_propdev(chosen, *name, + &node) == 0) + break; + } + } + if (chosen == -1 || *name == NULL) + node = OF_finddevice("serial0"); /* Last ditch */ + } else { + node = OF_finddevice(cp); + } + + if (node == -1) + return (ENXIO); + + /* + * Check old style of UART definition first. Unfortunately, the common + * FDT processing is not possible if we have clock, power domains and + * pinmux stuff. + */ + class = (struct uart_class *)uart_fdt_find_by_node(node, 0); + if (class != NULL) { + if ((err = uart_fdt_get_clock(node, &clk)) != 0) + return (err); + } else { + /* Check class only linker set */ + class = + (struct uart_class *)uart_fdt_find_by_node(node, 1); + if (class == NULL) + return (ENXIO); + clk = 0; + } + + /* + * Retrieve serial attributes. + */ + if (uart_fdt_get_shift(node, &shift) != 0) + shift = uart_getregshift(class); + + if (OF_getencprop(node, "current-speed", &br, sizeof(br)) <= 0) + br = 0; + + err = OF_decode_addr(node, 0, bst, bsh, NULL); + if (err != 0) + return (err); + + *classp = class; + *baud = br; + *rclk = clk; + *shiftp = shift; + + return (0); +} + +static int uart_fdt_probe(device_t dev) { struct uart_softc *sc; Modified: head/sys/dev/uart/uart_cpu_fdt.c ============================================================================== --- head/sys/dev/uart/uart_cpu_fdt.c Wed Jul 20 16:59:36 2016 (r303099) +++ head/sys/dev/uart/uart_cpu_fdt.c Wed Jul 20 17:19:47 2016 (r303100) @@ -120,14 +120,11 @@ uart_fdt_find_by_node(phandle_t node, in int uart_cpu_getdev(int devtype, struct uart_devinfo *di) { - 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 shift, br, rclk; - char *cp; - int err; + bus_space_tag_t bst; + bus_space_handle_t bsh; + u_int shift, rclk; + int br, err; /* Allow overriding the FDT using the environment. */ class = &uart_ns8250_class; @@ -138,69 +135,24 @@ uart_cpu_getdev(int devtype, struct uart if (devtype != UART_DEV_CONSOLE) return (ENXIO); - /* Has the user forced a specific device node? */ - cp = kern_getenv("hw.fdt.console"); - if (cp == NULL) { - /* - * Retrieve /chosen/std{in,out}. - */ - node = -1; - if ((chosen = OF_finddevice("/chosen")) != -1) { - for (name = propnames; *name != NULL; name++) { - if (phandle_chosen_propdev(chosen, *name, - &node) == 0) - break; - } - } - if (chosen == -1 || *name == NULL) - node = OF_finddevice("serial0"); /* Last ditch */ - } else { - node = OF_finddevice(cp); - } - - if (node == -1) /* Can't find anything */ - return (ENXIO); - - /* - * Check old style of UART definition first. Unfortunately, the common - * FDT processing is not possible if we have clock, power domains and - * pinmux stuff. - */ - class = (struct uart_class *)uart_fdt_find_by_node(node, 0); - if (class != NULL) { - if ((err = uart_fdt_get_clock(node, &rclk)) != 0) - return (err); - } else { - /* Check class only linker set */ - class = - (struct uart_class *)uart_fdt_find_by_node(node, 1); - if (class == NULL) - return (ENXIO); - rclk = 0; - } - - /* - * Retrieve serial attributes. - */ - if (uart_fdt_get_shift(node, &shift) != 0) - shift = uart_getregshift(class); - - if (OF_getencprop(node, "current-speed", &br, sizeof(br)) <= 0) - br = 0; + err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, &shift); + if (err != 0) + return (err); /* * Finalize configuration. */ di->bas.chan = 0; - di->bas.regshft = (u_int)shift; + di->bas.regshft = shift; di->baudrate = br; - di->bas.rclk = (u_int)rclk; + di->bas.rclk = rclk; di->ops = uart_getops(class); di->databits = 8; di->stopbits = 1; di->parity = UART_PARITY_NONE; + di->bas.bst = bst; + di->bas.bsh = bsh; - err = OF_decode_addr(node, 0, &di->bas.bst, &di->bas.bsh, NULL); uart_bus_space_mem = di->bas.bst; uart_bus_space_io = NULL; Modified: head/sys/dev/uart/uart_cpu_fdt.h ============================================================================== --- head/sys/dev/uart/uart_cpu_fdt.h Wed Jul 20 16:59:36 2016 (r303099) +++ head/sys/dev/uart/uart_cpu_fdt.h Wed Jul 20 17:19:47 2016 (r303100) @@ -50,6 +50,8 @@ SET_DECLARE(uart_fdt_class_set, struct o #define UART_FDT_CLASS(data) \ 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 *); int uart_fdt_get_clock(phandle_t node, pcell_t *cell); int uart_fdt_get_shift(phandle_t node, pcell_t *cell); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
