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