Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * The setup file for serial related hardware on PMC-Sierra MSP processors. |
| 3 | * |
| 4 | * Copyright 2005 PMC-Sierra, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 12 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 13 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 14 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 15 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 16 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 17 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 18 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 19 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 20 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | */ |
| 26 | |
| 27 | #include <linux/serial.h> |
| 28 | #include <linux/serial_core.h> |
| 29 | #include <linux/serial_reg.h> |
| 30 | |
| 31 | #include <asm/bootinfo.h> |
| 32 | #include <asm/io.h> |
| 33 | #include <asm/processor.h> |
| 34 | #include <asm/serial.h> |
Yinghai Lu | b187f18 | 2007-07-18 00:49:10 -0700 | [diff] [blame] | 35 | #include <linux/serial_8250.h> |
Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 36 | |
| 37 | #include <msp_prom.h> |
| 38 | #include <msp_int.h> |
| 39 | #include <msp_regs.h> |
| 40 | |
Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 41 | void __init msp_serial_setup(void) |
| 42 | { |
| 43 | char *s; |
| 44 | char *endp; |
| 45 | struct uart_port up; |
| 46 | unsigned int uartclk; |
| 47 | |
| 48 | memset(&up, 0, sizeof(up)); |
| 49 | |
| 50 | /* Check if clock was specified in environment */ |
| 51 | s = prom_getenv("uartfreqhz"); |
| 52 | if(!(s && *s && (uartclk = simple_strtoul(s, &endp, 10)) && *endp == 0)) |
| 53 | uartclk = MSP_BASE_BAUD; |
| 54 | ppfinit("UART clock set to %d\n", uartclk); |
| 55 | |
| 56 | /* Initialize first serial port */ |
| 57 | up.mapbase = MSP_UART0_BASE; |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 58 | up.membase = ioremap_nocache(up.mapbase, MSP_UART_REG_LEN); |
Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 59 | up.irq = MSP_INT_UART0; |
| 60 | up.uartclk = uartclk; |
| 61 | up.regshift = 2; |
| 62 | up.iotype = UPIO_DWAPB; /* UPIO_MEM like */ |
Ralf Baechle | 1553f6a | 2007-10-09 15:15:21 +0100 | [diff] [blame] | 63 | up.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST; |
Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 64 | up.type = PORT_16550A; |
| 65 | up.line = 0; |
| 66 | up.private_data = (void*)UART0_STATUS_REG; |
| 67 | if (early_serial_setup(&up)) |
| 68 | printk(KERN_ERR "Early serial init of port 0 failed\n"); |
| 69 | |
| 70 | /* Initialize the second serial port, if one exists */ |
| 71 | switch (mips_machtype) { |
| 72 | case MACH_MSP4200_EVAL: |
| 73 | case MACH_MSP4200_GW: |
| 74 | case MACH_MSP4200_FPGA: |
| 75 | case MACH_MSP7120_EVAL: |
| 76 | case MACH_MSP7120_GW: |
| 77 | case MACH_MSP7120_FPGA: |
| 78 | /* Enable UART1 on MSP4200 and MSP7120 */ |
| 79 | *GPIO_CFG2_REG = 0x00002299; |
Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 80 | break; |
| 81 | |
| 82 | default: |
| 83 | return; /* No second serial port, good-bye. */ |
| 84 | } |
| 85 | |
| 86 | up.mapbase = MSP_UART1_BASE; |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 87 | up.membase = ioremap_nocache(up.mapbase, MSP_UART_REG_LEN); |
Marc St-Jean | beab697 | 2007-05-06 14:48:45 -0700 | [diff] [blame] | 88 | up.irq = MSP_INT_UART1; |
| 89 | up.line = 1; |
| 90 | up.private_data = (void*)UART1_STATUS_REG; |
| 91 | if (early_serial_setup(&up)) |
| 92 | printk(KERN_ERR "Early serial init of port 1 failed\n"); |
| 93 | } |