diff options
Diffstat (limited to 'drivers/serial/8250.c')
| -rw-r--r-- | drivers/serial/8250.c | 229 |
1 files changed, 168 insertions, 61 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 303272af386..0d934bfbdd9 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -279,6 +279,13 @@ static const struct serial8250_config uart_config[] = { .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, .flags = UART_CAP_FIFO, }, + [PORT_OCTEON] = { + .name = "OCTEON", + .fifo_size = 64, + .tx_loadsz = 64, + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, + .flags = UART_CAP_FIFO, + }, }; #if defined (CONFIG_SERIAL_8250_AU1X00) @@ -303,16 +310,16 @@ static const u8 au_io_out_map[] = { }; /* sane hardware needs no mapping */ -static inline int map_8250_in_reg(struct uart_8250_port *up, int offset) +static inline int map_8250_in_reg(struct uart_port *p, int offset) { - if (up->port.iotype != UPIO_AU) + if (p->iotype != UPIO_AU) return offset; return au_io_in_map[offset]; } -static inline int map_8250_out_reg(struct uart_8250_port *up, int offset) +static inline int map_8250_out_reg(struct uart_port *p, int offset) { - if (up->port.iotype != UPIO_AU) + if (p->iotype != UPIO_AU) return offset; return au_io_out_map[offset]; } @@ -341,16 +348,16 @@ static const u8 [UART_SCR] = 0x2c }; -static inline int map_8250_in_reg(struct uart_8250_port *up, int offset) +static inline int map_8250_in_reg(struct uart_port *p, int offset) { - if (up->port.iotype != UPIO_RM9000) + if (p->iotype != UPIO_RM9000) return offset; return regmap_in[offset]; } -static inline int map_8250_out_reg(struct uart_8250_port *up, int offset) +static inline int map_8250_out_reg(struct uart_port *p, int offset) { - if (up->port.iotype != UPIO_RM9000) + if (p->iotype != UPIO_RM9000) return offset; return regmap_out[offset]; } @@ -363,108 +370,170 @@ static inline int map_8250_out_reg(struct uart_8250_port *up, int offset) #endif -static unsigned int serial_in(struct uart_8250_port *up, int offset) +static unsigned int hub6_serial_in(struct uart_port *p, int offset) { - unsigned int tmp; - offset = map_8250_in_reg(up, offset) << up->port.regshift; + offset = map_8250_in_reg(p, offset) << p->regshift; + outb(p->hub6 - 1 + offset, p->iobase); + return inb(p->iobase + 1); +} - switch (up->port.iotype) { - case UPIO_HUB6: - outb(up->port.hub6 - 1 + offset, up->port.iobase); - return inb(up->port.iobase + 1); +static void hub6_serial_out(struct uart_port *p, int offset, int value) +{ + offset = map_8250_out_reg(p, offset) << p->regshift; + outb(p->hub6 - 1 + offset, p->iobase); + outb(value, p->iobase + 1); +} - case UPIO_MEM: - case UPIO_DWAPB: - return readb(up->port.membase + offset); +static unsigned int mem_serial_in(struct uart_port *p, int offset) +{ + offset = map_8250_in_reg(p, offset) << p->regshift; + return readb(p->membase + offset); +} - case UPIO_RM9000: - case UPIO_MEM32: - return readl(up->port.membase + offset); +static void mem_serial_out(struct uart_port *p, int offset, int value) +{ + offset = map_8250_out_reg(p, offset) << p->regshift; + writeb(value, p->membase + offset); +} + +static void mem32_serial_out(struct uart_port *p, int offset, int value) +{ + offset = map_8250_out_reg(p, offset) << p->regshift; + writel(value, p->membase + offset); +} + +static unsigned int mem32_serial_in(struct uart_port *p, int offset) +{ + offset = map_8250_in_reg(p, offset) << p->regshift; + return readl(p->membase + offset); +} #ifdef CONFIG_SERIAL_8250_AU1X00 - case UPIO_AU: - return __raw_readl(up->port.membase + offset); +static unsigned int au_serial_in(struct uart_port *p, int offset) +{ + offset = map_8250_in_reg(p, offset) << p->regshift; + return __raw_readl(p->membase + offset); +} + +static void au_serial_out(struct uart_port *p, int offset, int value) +{ + offset = map_8250_out_reg(p, offset) << p->regshift; + __raw_writel(value, p->membase + offset); +} #endif - case UPIO_TSI: - if (offset == UART_IIR) { - tmp = readl(up->port.membase + (UART_IIR & ~3)); - return (tmp >> 16) & 0xff; /* UART_IIR % 4 == 2 */ - } else - return readb(up->port.membase + offset); +static unsigned int tsi_serial_in(struct uart_port *p, int offset) +{ + unsigned int tmp; + offset = map_8250_in_reg(p, offset) << p->regshift; + if (offset == UART_IIR) { + tmp = readl(p->membase + (UART_IIR & ~3)); + return (tmp >> 16) & 0xff; /* UART_IIR % 4 == 2 */ + } else + return readb(p->membase + offset); +} - default: - return inb(up->port.iobase + offset); - } +static void tsi_serial_out(struct uart_port *p, int offset, int value) +{ + offset = map_8250_out_reg(p, offset) << p->regshift; + if (!((offset == UART_IER) && (value & UART_IER_UUE))) + writeb(value, p->membase + offset); } -static void -serial_out(struct uart_8250_port *up, int offset, int value) +static void dwapb_serial_out(struct uart_port *p, int offset, int value) { - /* Save the offset before it's remapped */ int save_offset = offset; - offset = map_8250_out_reg(up, offset) << up->port.regshift; + offset = map_8250_out_reg(p, offset) << p->regshift; + /* Save the LCR value so it can be re-written when a + * Busy Detect interrupt occurs. */ + if (save_offset == UART_LCR) { + struct uart_8250_port *up = (struct uart_8250_port *)p; + up->lcr = value; + } + writeb(value, p->membase + offset); + /* Read the IER to ensure any interrupt is cleared before + * returning from ISR. */ + if (save_offset == UART_TX || save_offset == UART_IER) + value = p->serial_in(p, UART_IER); +} - switch (up->port.iotype) { +static unsigned int io_serial_in(struct uart_port *p, int offset) +{ + offset = map_8250_in_reg(p, offset) << p->regshift; + return inb(p->iobase + offset); +} + +static void io_serial_out(struct uart_port *p, int offset, int value) +{ + offset = map_8250_out_reg(p, offset) << p->regshift; + outb(value, p->iobase + offset); +} + +static void set_io_from_upio(struct uart_port *p) +{ + switch (p->iotype) { case UPIO_HUB6: - outb(up->port.hub6 - 1 + offset, up->port.iobase); - outb(value, up->port.iobase + 1); + p->serial_in = hub6_serial_in; + p->serial_out = hub6_serial_out; break; case UPIO_MEM: - writeb(value, up->port.membase + offset); + p->serial_in = mem_serial_in; + p->serial_out = mem_serial_out; break; case UPIO_RM9000: case UPIO_MEM32: - writel(value, up->port.membase + offset); + p->serial_in = mem32_serial_in; + p->serial_out = mem32_serial_out; break; #ifdef CONFIG_SERIAL_8250_AU1X00 case UPIO_AU: - __raw_writel(value, up->port.membase + offset); + p->serial_in = au_serial_in; + p->serial_out = au_serial_out; break; #endif case UPIO_TSI: - if (!((offset == UART_IER) && (value & UART_IER_UUE))) - writeb(value, up->port.membase + offset); + p->serial_in = tsi_serial_in; + p->serial_out = tsi_serial_out; break; case UPIO_DWAPB: - /* Save the LCR value so it can be re-written when a - * Busy Detect interrupt occurs. */ - if (save_offset == UART_LCR) - up->lcr = value; - writeb(value, up->port.membase + offset); - /* Read the IER to ensure any interrupt is cleared before - * returning from ISR. */ - if (save_offset == UART_TX || save_offset == UART_IER) - value = serial_in(up, UART_IER); + p->serial_in = mem_serial_in; + p->serial_out = dwapb_serial_out; break; default: - outb(value, up->port.iobase + offset); + p->serial_in = io_serial_in; + p->serial_out = io_serial_out; + break; } } static void serial_out_sync(struct uart_8250_port *up, int offset, int value) { - switch (up->port.iotype) { + struct uart_port *p = &up->port; + switch (p->iotype) { case UPIO_MEM: case UPIO_MEM32: #ifdef CONFIG_SERIAL_8250_AU1X00 case UPIO_AU: #endif case UPIO_DWAPB: - serial_out(up, offset, value); - serial_in(up, UART_LCR); /* safe, no side-effects */ + p->serial_out(p, offset, value); + p->serial_in(p, UART_LCR); /* safe, no side-effects */ break; default: - serial_out(up, offset, value); + p->serial_out(p, offset, value); } } +#define serial_in(up, offset) \ + (up->port.serial_in(&(up)->port, (offset))) +#define serial_out(up, offset, value) \ + (up->port.serial_out(&(up)->port, (offset), (value))) /* * We used to support using pause I/O for certain machines. We * haven't supported this for a while, but just in case it's badly @@ -2576,6 +2645,7 @@ static void __init serial8250_isa_init_ports(void) up->port.membase = old_serial_port[i].iomem_base; up->port.iotype = old_serial_port[i].io_type; up->port.regshift = old_serial_port[i].iomem_reg_shift; + set_io_from_upio(&up->port); if (share_irqs) up->port.flags |= UPF_SHARE_IRQ; } @@ -2752,12 +2822,32 @@ static struct uart_driver serial8250_reg = { */ int __init early_serial_setup(struct uart_port *port) { + struct uart_port *p; + if (port->line >= ARRAY_SIZE(serial8250_ports)) return -ENODEV; serial8250_isa_init_ports(); - serial8250_ports[port->line].port = *port; - serial8250_ports[port->line].port.ops = &serial8250_pops; + p = &serial8250_ports[port->line].port; + p->iobase = port->iobase; + p->membase = port->membase; + p->irq = port->irq; + p->uartclk = port->uartclk; + p->fifosize = port->fifosize; + p->regshift = port->regshift; + p->iotype = port->iotype; + p->flags = port->flags; + p->mapbase = port->mapbase; + p->private_data = port->private_data; + p->type = port->type; + p->line = port->line; + + set_io_from_upio(p); + if (port->serial_in) + p->serial_in = port->serial_in; + if (port->serial_out) + p->serial_out = port->serial_out; + return 0; } @@ -2822,6 +2912,9 @@ static int __devinit serial8250_probe(struct platform_device *dev) port.mapbase = p->mapbase; port.hub6 = p->hub6; port.private_data = p->private_data; + port.type = p->type; + port.serial_in = p->serial_in; + port.serial_out = p->serial_out; port.dev = &dev->dev; if (share_irqs) port.flags |= UPF_SHARE_IRQ; @@ -2976,6 +3069,20 @@ int serial8250_register_port(struct uart_port *port) if (port->dev) uart->port.dev = port->dev; + if (port->flags & UPF_FIXED_TYPE) { + uart->port.type = port->type; + uart->port.fifosize = uart_config[port->type].fifo_size; + uart->capabilities = uart_config[port->type].flags; + uart->tx_loadsz = uart_config[port->type].tx_loadsz; + } + + set_io_from_upio(&uart->port); + /* Possibly override default I/O functions. */ + if (port->serial_in) + uart->port.serial_in = port->serial_in; + if (port->serial_out) + uart->port.serial_out = port->serial_out; + ret = uart_add_one_port(&serial8250_reg, &uart->port); if (ret == 0) ret = uart->port.line; @@ -3018,7 +3125,7 @@ static int __init serial8250_init(void) if (nr_uarts > UART_NR) nr_uarts = UART_NR; - printk(KERN_INFO "Serial: 8250/16550 driver" + printk(KERN_INFO "Serial: 8250/16550 driver, " "%d ports, IRQ sharing %sabled\n", nr_uarts, share_irqs ? "en" : "dis"); |