diff options
Diffstat (limited to 'arch/mips/pmcs-msp71xx/msp_serial.c')
| -rw-r--r-- | arch/mips/pmcs-msp71xx/msp_serial.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/arch/mips/pmcs-msp71xx/msp_serial.c b/arch/mips/pmcs-msp71xx/msp_serial.c deleted file mode 100644 index 8e6e8db8dd5f..000000000000 --- a/arch/mips/pmcs-msp71xx/msp_serial.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * The setup file for serial related hardware on PMC-Sierra MSP processors. - * - * Copyright 2005 PMC-Sierra, Inc. - * - * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * 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., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/serial_reg.h> -#include <linux/slab.h> - -#include <asm/bootinfo.h> -#include <asm/io.h> -#include <asm/processor.h> -#include <asm/serial.h> -#include <linux/serial_8250.h> - -#include <msp_prom.h> -#include <msp_int.h> -#include <msp_regs.h> - -struct msp_uart_data { - int last_lcr; -}; - -static void msp_serial_out(struct uart_port *p, int offset, int value) -{ - struct msp_uart_data *d = p->private_data; - - if (offset == UART_LCR) - d->last_lcr = value; - - offset <<= p->regshift; - writeb(value, p->membase + offset); -} - -static unsigned int msp_serial_in(struct uart_port *p, int offset) -{ - offset <<= p->regshift; - - return readb(p->membase + offset); -} - -static int msp_serial_handle_irq(struct uart_port *p) -{ - struct msp_uart_data *d = p->private_data; - unsigned int iir = readb(p->membase + (UART_IIR << p->regshift)); - - if (serial8250_handle_irq(p, iir)) { - return 1; - } else if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) { - /* - * The DesignWare APB UART has an Busy Detect (0x07) interrupt - * meaning an LCR write attempt occurred while the UART was - * busy. The interrupt must be cleared by reading the UART - * status register (USR) and the LCR re-written. - * - * Note: MSP reserves 0x20 bytes of address space for the UART - * and the USR is mapped in a separate block at an offset of - * 0xc0 from the start of the UART. - */ - (void)readb(p->membase + 0xc0); - writeb(d->last_lcr, p->membase + (UART_LCR << p->regshift)); - - return 1; - } - - return 0; -} - -void __init msp_serial_setup(void) -{ - char *s; - char *endp; - struct uart_port up; - unsigned int uartclk; - - memset(&up, 0, sizeof(up)); - - /* Check if clock was specified in environment */ - s = prom_getenv("uartfreqhz"); - if(!(s && *s && (uartclk = simple_strtoul(s, &endp, 10)) && *endp == 0)) - uartclk = MSP_BASE_BAUD; - ppfinit("UART clock set to %d\n", uartclk); - - /* Initialize first serial port */ - up.mapbase = MSP_UART0_BASE; - up.membase = ioremap_nocache(up.mapbase, MSP_UART_REG_LEN); - up.irq = MSP_INT_UART0; - up.uartclk = uartclk; - up.regshift = 2; - up.iotype = UPIO_MEM; - up.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST; - up.type = PORT_16550A; - up.line = 0; - up.serial_out = msp_serial_out; - up.serial_in = msp_serial_in; - up.handle_irq = msp_serial_handle_irq; - up.private_data = kzalloc(sizeof(struct msp_uart_data), GFP_KERNEL); - if (!up.private_data) { - pr_err("failed to allocate uart private data\n"); - return; - } - if (early_serial_setup(&up)) { - kfree(up.private_data); - pr_err("Early serial init of port 0 failed\n"); - } - - /* Initialize the second serial port, if one exists */ - switch (mips_machtype) { - case MACH_MSP4200_EVAL: - case MACH_MSP4200_GW: - case MACH_MSP4200_FPGA: - case MACH_MSP7120_EVAL: - case MACH_MSP7120_GW: - case MACH_MSP7120_FPGA: - /* Enable UART1 on MSP4200 and MSP7120 */ - *GPIO_CFG2_REG = 0x00002299; - break; - - default: - return; /* No second serial port, good-bye. */ - } - - up.mapbase = MSP_UART1_BASE; - up.membase = ioremap_nocache(up.mapbase, MSP_UART_REG_LEN); - up.irq = MSP_INT_UART1; - up.line = 1; - up.private_data = (void*)UART1_STATUS_REG; - if (early_serial_setup(&up)) { - kfree(up.private_data); - pr_err("Early serial init of port 1 failed\n"); - } -} |