diff options
| -rw-r--r-- | arch/powerpc/platforms/celleb/scc_sio.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/celleb/scc_sio.c b/arch/powerpc/platforms/celleb/scc_sio.c new file mode 100644 index 0000000..bcd25f5 --- /dev/null +++ b/arch/powerpc/platforms/celleb/scc_sio.c @@ -0,0 +1,101 @@ +/* + * setup serial port in SCC + * + * (C) Copyright 2006 TOSHIBA CORPORATION + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/tty.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/console.h> + +#include <asm/io.h> +#include <asm/prom.h> + +/* sio irq0=0xb00010022 irq0=0xb00010023 irq2=0xb00010024 + mmio=0xfff000-0x1000,0xff2000-0x1000 */ +static int txx9_serial_bitmap = 0; + +static struct { + uint32_t offset; + uint32_t index; +} txx9_scc_tab[3] = { + { 0x300, 0 }, /* 0xFFF300 */ + { 0x400, 0 }, /* 0xFFF400 */ + { 0x800, 1 } /* 0xFF2800 */ +}; + +static int txx9_serial_init(void) +{ + extern int early_serial_txx9_setup(struct uart_port *port); + struct device_node *node; + int i; + struct uart_port req; + struct of_irq irq; + struct resource res; + + node = of_find_node_by_path("/ioif1/sio"); + if (!node) + return 0; + + for(i = 0; i < sizeof(txx9_scc_tab)/sizeof(txx9_scc_tab[0]); i++) { + if (!(txx9_serial_bitmap & (1<<i))) + continue; + + if (of_irq_map_one(node, i, &irq)) + continue; + if (of_address_to_resource(node, txx9_scc_tab[i].index, &res)) + continue; + + memset(&req, 0, sizeof(req)); + req.line = i; + req.iotype = UPIO_MEM; + req.mapbase = res.start + txx9_scc_tab[i].offset; +#ifdef CONFIG_SERIAL_TXX9_CONSOLE + req.membase = ioremap(req.mapbase, 0x24); +#endif + req.irq = irq_create_of_mapping(irq.controller, + irq.specifier, irq.size); + req.flags |= UPF_IOREMAP | UPF_BUGGY_UART /*HAVE_CTS_LINE*/; + req.uartclk = 83300000; + early_serial_txx9_setup(&req); + } + + of_node_put(node); + return 0; +} + +static int txx9_serial_config(char *ptr) +{ + int i; + + for (;;) { + switch(get_option(&ptr, &i)) { + default: + return 0; + case 2: + txx9_serial_bitmap |= 1 << i; + break; + case 1: + txx9_serial_bitmap |= 1 << i; + return 0; + } + } +} +__setup("txx9_serial=", txx9_serial_config); + +console_initcall(txx9_serial_init); |
