--- a/arch/arm/mach-ixp4xx/cambria-setup.c +++ b/arch/arm/mach-ixp4xx/cambria-setup.c @@ -34,6 +34,7 @@ #include <asm/mach/arch.h> #include <asm/mach/flash.h> #include <asm/setup.h> +#include <linux/irq.h> struct cambria_board_info { unsigned char *model; @@ -127,6 +128,45 @@ static struct platform_device cambria_ua .resource = &cambria_uart_resource, }; +static struct resource cambria_optional_uart_resources[] = { + { + .start = 0x52000000, + .end = 0x52000fff, + .flags = IORESOURCE_MEM + }, + { + .start = 0x53000000, + .end = 0x53000fff, + .flags = IORESOURCE_MEM + } +}; + +static struct plat_serial8250_port cambria_optional_uart_data[] = { + { + .flags = UPF_BOOT_AUTOCONF, + .iotype = UPIO_MEM_DELAY, + .regshift = 0, + .uartclk = 1843200, + .rw_delay = 2, + }, + { + .flags = UPF_BOOT_AUTOCONF, + .iotype = UPIO_MEM_DELAY, + .regshift = 0, + .uartclk = 1843200, + .rw_delay = 2, + }, + { }, +}; + +static struct platform_device cambria_optional_uart = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM1, + .dev.platform_data = cambria_optional_uart_data, + .num_resources = 2, + .resource = cambria_optional_uart_resources, +}; + static struct resource cambria_pata_resources[] = { { .flags = IORESOURCE_MEM @@ -283,6 +323,19 @@ static void __init cambria_gw23xx_setup( static void __init cambria_gw2350_setup(void) { + *IXP4XX_EXP_CS2 = 0xBFFF3C43; + set_irq_type(IRQ_IXP4XX_GPIO3, IRQ_TYPE_EDGE_RISING); + cambria_optional_uart_data[0].mapbase = 0x52FF0000; + cambria_optional_uart_data[0].membase = (void __iomem *)ioremap(0x52FF0000, 0x0fff); + cambria_optional_uart_data[0].irq = IRQ_IXP4XX_GPIO3; + + *IXP4XX_EXP_CS3 = 0xBFFF3C43; + set_irq_type(IRQ_IXP4XX_GPIO4, IRQ_TYPE_EDGE_RISING); + cambria_optional_uart_data[1].mapbase = 0x53FF0000; + cambria_optional_uart_data[1].membase = (void __iomem *)ioremap(0x53FF0000, 0x0fff); + cambria_optional_uart_data[1].irq = IRQ_IXP4XX_GPIO4; + + platform_device_register(&cambria_optional_uart); platform_device_register(&cambria_npec_device); platform_device_register(&cambria_npea_device); @@ -294,6 +347,19 @@ static void __init cambria_gw2350_setup( static void __init cambria_gw2358_setup(void) { + *IXP4XX_EXP_CS3 = 0xBFFF3C43; + set_irq_type(IRQ_IXP4XX_GPIO3, IRQ_TYPE_EDGE_RISING); + cambria_optional_uart_data[0].mapbase = 0x53FC0000; + cambria_optional_uart_data[0].membase = (void __iomem *)ioremap(0x53FC0000, 0x0fff); + cambria_optional_uart_data[0].irq = IRQ_IXP4XX_GPIO3; + + set_irq_type(IRQ_IXP4XX_GPIO4, IRQ_TYPE_EDGE_RISING); + cambria_optional_uart_data[1].mapbase = 0x53F80000; + cambria_optional_uart_data[1].membase = (void __iomem *)ioremap(0x53F80000, 0x0fff); + cambria_optional_uart_data[1].irq = IRQ_IXP4XX_GPIO4; + + platform_device_register(&cambria_optional_uart); + platform_device_register(&cambria_npec_device); platform_device_register(&cambria_npea_device); --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -27,6 +27,7 @@ struct plat_serial8250_port { void *private_data; unsigned char regshift; /* register shift */ unsigned char iotype; /* UPIO_* */ + unsigned int rw_delay; /* udelay for slower busses IXP4XX Expansion Bus */ unsigned char hub6; upf_t flags; /* UPF_* flags */ unsigned int type; /* If UPF_FIXED_TYPE */ --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -285,6 +285,7 @@ struct uart_port { #define UPIO_TSI (5) /* Tsi108/109 type IO */ #define UPIO_DWAPB (6) /* DesignWare APB UART */ #define UPIO_RM9000 (7) /* RM9000 type IO */ +#define UPIO_MEM_DELAY (8) unsigned int read_status_mask; /* driver specific */ unsigned int ignore_status_mask; /* driver specific */ @@ -327,6 +328,7 @@ struct uart_port { unsigned int mctrl; /* current modem ctrl settings */ unsigned int timeout; /* character-based timeout */ + unsigned int rw_delay; /* udelay for slow busses, IXP4XX Expansion Bus */ unsigned int type; /* port type */ const struct uart_ops *ops; unsigned int custom_divisor; --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -409,6 +409,20 @@ static void mem_serial_out(struct uart_p writeb(value, p->membase + offset); } +static unsigned int memdelay_serial_in(struct uart_port *p, int offset) +{ + struct uart_8250_port *up = (struct uart_8250_port *)p; + udelay(up->port.rw_delay); + return mem_serial_in(p, offset); +} + +static void memdelay_serial_out(struct uart_port *p, int offset, int value) +{ + struct uart_8250_port *up = (struct uart_8250_port *)p; + udelay(up->port.rw_delay); + mem_serial_out(p, offset, value); +} + static void mem32_serial_out(struct uart_port *p, int offset, int value) { offset = map_8250_out_reg(p, offset) << p->regshift; @@ -502,6 +516,11 @@ static void set_io_from_upio(struct uart p->serial_out = mem32_serial_out; break; + case UPIO_MEM_DELAY: + p->serial_in = memdelay_serial_in; + p->serial_out = memdelay_serial_out; + break; + #ifdef CONFIG_SERIAL_8250_AU1X00 case UPIO_AU: p->serial_in = au_serial_in; @@ -534,6 +553,7 @@ serial_out_sync(struct uart_8250_port *u switch (p->iotype) { case UPIO_MEM: case UPIO_MEM32: + case UPIO_MEM_DELAY: #ifdef CONFIG_SERIAL_8250_AU1X00 case UPIO_AU: #endif @@ -2450,6 +2470,7 @@ static int serial8250_request_std_resour case UPIO_MEM32: case UPIO_MEM: case UPIO_DWAPB: + case UPIO_MEM_DELAY: if (!up->port.mapbase) break; @@ -2487,6 +2508,7 @@ static void serial8250_release_std_resou case UPIO_MEM32: case UPIO_MEM: case UPIO_DWAPB: + case UPIO_MEM_DELAY: if (!up->port.mapbase) break; @@ -2959,6 +2981,7 @@ static int __devinit serial8250_probe(st port.serial_in = p->serial_in; port.serial_out = p->serial_out; port.dev = &dev->dev; + port.rw_delay = p->rw_delay; if (share_irqs) port.irqflags |= IRQF_SHARED; ret = serial8250_register_port(&port); @@ -3109,6 +3132,7 @@ int serial8250_register_port(struct uart uart->port.iotype = port->iotype; uart->port.flags = port->flags | UPF_BOOT_AUTOCONF; uart->port.mapbase = port->mapbase; + uart->port.rw_delay = port->rw_delay; uart->port.private_data = port->private_data; if (port->dev) uart->port.dev = port->dev; --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -2161,6 +2161,7 @@ uart_report_port(struct uart_driver *drv snprintf(address, sizeof(address), "I/O 0x%lx offset 0x%x", port->iobase, port->hub6); break; + case UPIO_MEM_DELAY: case UPIO_MEM: case UPIO_MEM32: case UPIO_AU: @@ -2573,6 +2574,7 @@ int uart_match_port(struct uart_port *po case UPIO_HUB6: return (port1->iobase == port2->iobase) && (port1->hub6 == port2->hub6); + case UPIO_MEM_DELAY: case UPIO_MEM: case UPIO_MEM32: case UPIO_AU: