From: Felix Fietkau Date: Sun, 7 Oct 2012 23:23:25 +0000 (+0000) Subject: ixp4xx: split out new UART I/O to its own patch X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d3567cc886a21426121bd555efe5ec9d7768e3ed;p=openwrt%2Fstaging%2Fyousong.git ixp4xx: split out new UART I/O to its own patch This is being done for general cleanup Signed-off-by: Tim Harvey SVN-Revision: 33642 --- diff --git a/target/linux/ixp4xx/patches-3.3/160-delayed_uart_io.patch b/target/linux/ixp4xx/patches-3.3/160-delayed_uart_io.patch new file mode 100644 index 0000000000..a3b1f25e5b --- /dev/null +++ b/target/linux/ixp4xx/patches-3.3/160-delayed_uart_io.patch @@ -0,0 +1,122 @@ +Add a new UART I/O type for slow busses such as the ixp4xx expansion bus +--- 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 +@@ -324,6 +324,7 @@ struct uart_port { + #define UPIO_AU (4) /* Au1x00 type IO */ + #define UPIO_TSI (5) /* Tsi108/109 type IO */ + #define UPIO_RM9000 (6) /* RM9000 type IO */ ++#define UPIO_MEM_DELAY (7) + + unsigned int read_status_mask; /* driver specific */ + unsigned int ignore_status_mask; /* driver specific */ +@@ -368,6 +369,7 @@ 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/tty/serial/8250/8250.c ++++ b/drivers/tty/serial/8250/8250.c +@@ -400,6 +400,20 @@ 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; +@@ -459,6 +473,11 @@ 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; ++ + case UPIO_AU: + p->serial_in = au_serial_in; + p->serial_out = au_serial_out; +@@ -481,6 +500,7 @@ serial_out_sync(struct uart_8250_port *u + switch (p->iotype) { + case UPIO_MEM: + case UPIO_MEM32: ++ case UPIO_MEM_DELAY: + case UPIO_AU: + p->serial_out(p, offset, value); + p->serial_in(p, UART_LCR); /* safe, no side-effects */ +@@ -2498,6 +2518,7 @@ static int serial8250_request_std_resour + case UPIO_TSI: + case UPIO_MEM32: + case UPIO_MEM: ++ case UPIO_MEM_DELAY: + if (!up->port.mapbase) + break; + +@@ -2534,6 +2555,7 @@ static void serial8250_release_std_resou + case UPIO_TSI: + case UPIO_MEM32: + case UPIO_MEM: ++ case UPIO_MEM_DELAY: + if (!up->port.mapbase) + break; + +@@ -3050,6 +3072,7 @@ static int __devinit serial8250_probe(st + port.set_termios = p->set_termios; + port.pm = p->pm; + port.dev = &dev->dev; ++ port.rw_delay = p->rw_delay; + port.irqflags |= irqflag; + ret = serial8250_register_port(&port); + if (ret < 0) { +@@ -3199,6 +3222,7 @@ 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/tty/serial/serial_core.c ++++ b/drivers/tty/serial/serial_core.c +@@ -2021,6 +2021,7 @@ 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: +@@ -2435,6 +2436,7 @@ 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: diff --git a/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch b/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch index 636ebd715b..130606fb5f 100644 --- a/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch +++ b/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch @@ -94,124 +94,3 @@ 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 -@@ -324,6 +324,7 @@ struct uart_port { - #define UPIO_AU (4) /* Au1x00 type IO */ - #define UPIO_TSI (5) /* Tsi108/109 type IO */ - #define UPIO_RM9000 (6) /* RM9000 type IO */ -+#define UPIO_MEM_DELAY (7) - - unsigned int read_status_mask; /* driver specific */ - unsigned int ignore_status_mask; /* driver specific */ -@@ -368,6 +369,7 @@ 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/tty/serial/8250/8250.c -+++ b/drivers/tty/serial/8250/8250.c -@@ -400,6 +400,20 @@ 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; -@@ -459,6 +473,11 @@ 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; -+ - case UPIO_AU: - p->serial_in = au_serial_in; - p->serial_out = au_serial_out; -@@ -481,6 +500,7 @@ serial_out_sync(struct uart_8250_port *u - switch (p->iotype) { - case UPIO_MEM: - case UPIO_MEM32: -+ case UPIO_MEM_DELAY: - case UPIO_AU: - p->serial_out(p, offset, value); - p->serial_in(p, UART_LCR); /* safe, no side-effects */ -@@ -2498,6 +2518,7 @@ static int serial8250_request_std_resour - case UPIO_TSI: - case UPIO_MEM32: - case UPIO_MEM: -+ case UPIO_MEM_DELAY: - if (!up->port.mapbase) - break; - -@@ -2534,6 +2555,7 @@ static void serial8250_release_std_resou - case UPIO_TSI: - case UPIO_MEM32: - case UPIO_MEM: -+ case UPIO_MEM_DELAY: - if (!up->port.mapbase) - break; - -@@ -3050,6 +3072,7 @@ static int __devinit serial8250_probe(st - port.set_termios = p->set_termios; - port.pm = p->pm; - port.dev = &dev->dev; -+ port.rw_delay = p->rw_delay; - port.irqflags |= irqflag; - ret = serial8250_register_port(&port); - if (ret < 0) { -@@ -3199,6 +3222,7 @@ 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/tty/serial/serial_core.c -+++ b/drivers/tty/serial/serial_core.c -@@ -2021,6 +2021,7 @@ 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: -@@ -2435,6 +2436,7 @@ 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: