diff options
Diffstat (limited to 'drivers/serial/mux.c')
| -rw-r--r-- | drivers/serial/mux.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c index 189064607709..7633132a10aa 100644 --- a/drivers/serial/mux.c +++ b/drivers/serial/mux.c @@ -27,6 +27,7 @@ #include <linux/delay.h> /* for udelay */ #include <linux/device.h> #include <asm/io.h> +#include <asm/irq.h> #include <asm/parisc-device.h> #ifdef CONFIG_MAGIC_SYSRQ @@ -64,8 +65,8 @@ static struct uart_driver mux_driver = { static struct timer_list mux_timer; -#define UART_PUT_CHAR(p, c) __raw_writel((c), (unsigned long)(p)->membase + IO_DATA_REG_OFFSET) -#define UART_GET_FIFO_CNT(p) __raw_readl((unsigned long)(p)->membase + IO_DCOUNT_REG_OFFSET) +#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET) +#define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET) #define GET_MUX_PORTS(iodc_data) ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8 /** @@ -78,10 +79,7 @@ static struct timer_list mux_timer; */ static unsigned int mux_tx_empty(struct uart_port *port) { - unsigned int cnt = __raw_readl((unsigned long)port->membase - + IO_DCOUNT_REG_OFFSET); - - return cnt ? 0 : TIOCSER_TEMT; + return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT; } /** @@ -217,8 +215,7 @@ static void mux_read(struct uart_port *port) __u32 start_count = port->icount.rx; while(1) { - data = __raw_readl((unsigned long)port->membase - + IO_DATA_REG_OFFSET); + data = __raw_readl(port->membase + IO_DATA_REG_OFFSET); if (MUX_STATUS(data)) continue; @@ -444,7 +441,7 @@ static int __init mux_probe(struct parisc_device *dev) unsigned long bytecnt; struct uart_port *port; - status = pdc_iodc_read(&bytecnt, dev->hpa, 0, iodc_data, 32); + status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32); if(status != PDC_OK) { printk(KERN_ERR "Serial mux: Unable to read IODC.\n"); return 1; @@ -469,16 +466,25 @@ static int __init mux_probe(struct parisc_device *dev) for(i = 0; i < ports; ++i, ++port_cnt) { port = &mux_ports[port_cnt]; port->iobase = 0; - port->mapbase = dev->hpa + MUX_OFFSET + (i * MUX_LINE_OFFSET); + port->mapbase = dev->hpa.start + MUX_OFFSET + + (i * MUX_LINE_OFFSET); port->membase = ioremap(port->mapbase, MUX_LINE_OFFSET); port->iotype = SERIAL_IO_MEM; port->type = PORT_MUX; - port->irq = SERIAL_IRQ_NONE; + port->irq = NO_IRQ; port->uartclk = 0; port->fifosize = MUX_FIFO_SIZE; port->ops = &mux_pops; port->flags = UPF_BOOT_AUTOCONF; port->line = port_cnt; + + /* The port->timeout needs to match what is present in + * uart_wait_until_sent in serial_core.c. Otherwise + * the time spent in msleep_interruptable will be very + * long, causing the appearance of a console hang. + */ + port->timeout = HZ / 50; + spin_lock_init(&port->lock); status = uart_add_one_port(&mux_driver, port); BUG_ON(status); } @@ -497,7 +503,7 @@ static struct parisc_device_id mux_tbl[] = { MODULE_DEVICE_TABLE(parisc, mux_tbl); static struct parisc_driver serial_mux_driver = { - .name = "Serial MUX", + .name = "serial_mux", .id_table = mux_tbl, .probe = mux_probe, }; |