From e259a3aecbfb61981175ddc7fc02dd180da7d73e Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 20 Aug 2007 09:47:41 +0100 Subject: [ARM] pxa: convert PXA serial drivers to use platform resources Signed-off-by: Russell King --- drivers/serial/pxa.c | 139 ++++++++++++++++++++++----------------------------- 1 file changed, 61 insertions(+), 78 deletions(-) (limited to 'drivers/serial') diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c index e9c6cb3..59889f6 100644 --- a/drivers/serial/pxa.c +++ b/drivers/serial/pxa.c @@ -582,7 +582,7 @@ serial_pxa_type(struct uart_port *port) #ifdef CONFIG_SERIAL_PXA_CONSOLE -static struct uart_pxa_port serial_pxa_ports[]; +static struct uart_pxa_port *serial_pxa_ports[4]; static struct uart_driver serial_pxa_reg; #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) @@ -632,7 +632,7 @@ static void serial_pxa_console_putchar(struct uart_port *port, int ch) static void serial_pxa_console_write(struct console *co, const char *s, unsigned int count) { - struct uart_pxa_port *up = &serial_pxa_ports[co->index]; + struct uart_pxa_port *up = serial_pxa_ports[co->index]; unsigned int ier; /* @@ -662,7 +662,9 @@ serial_pxa_console_setup(struct console *co, char *options) if (co->index == -1 || co->index >= serial_pxa_reg.nr) co->index = 0; - up = &serial_pxa_ports[co->index]; + up = serial_pxa_ports[co->index]; + if (!up) + return -ENODEV; if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); @@ -680,15 +682,6 @@ static struct console serial_pxa_console = { .data = &serial_pxa_reg, }; -static int __init -serial_pxa_console_init(void) -{ - register_console(&serial_pxa_console); - return 0; -} - -console_initcall(serial_pxa_console_init); - #define PXA_CONSOLE &serial_pxa_console #else #define PXA_CONSOLE NULL @@ -714,73 +707,13 @@ struct uart_ops serial_pxa_pops = { .verify_port = serial_pxa_verify_port, }; -static struct uart_pxa_port serial_pxa_ports[] = { - { /* FFUART */ - .name = "FFUART", - .cken = CKEN_FFUART, - .port = { - .type = PORT_PXA, - .iotype = UPIO_MEM, - .membase = (void *)&FFUART, - .mapbase = __PREG(FFUART), - .irq = IRQ_FFUART, - .uartclk = 921600 * 16, - .fifosize = 64, - .ops = &serial_pxa_pops, - .line = 0, - }, - }, { /* BTUART */ - .name = "BTUART", - .cken = CKEN_BTUART, - .port = { - .type = PORT_PXA, - .iotype = UPIO_MEM, - .membase = (void *)&BTUART, - .mapbase = __PREG(BTUART), - .irq = IRQ_BTUART, - .uartclk = 921600 * 16, - .fifosize = 64, - .ops = &serial_pxa_pops, - .line = 1, - }, - }, { /* STUART */ - .name = "STUART", - .cken = CKEN_STUART, - .port = { - .type = PORT_PXA, - .iotype = UPIO_MEM, - .membase = (void *)&STUART, - .mapbase = __PREG(STUART), - .irq = IRQ_STUART, - .uartclk = 921600 * 16, - .fifosize = 64, - .ops = &serial_pxa_pops, - .line = 2, - }, - }, { /* HWUART */ - .name = "HWUART", - .cken = CKEN_HWUART, - .port = { - .type = PORT_PXA, - .iotype = UPIO_MEM, - .membase = (void *)&HWUART, - .mapbase = __PREG(HWUART), - .irq = IRQ_HWUART, - .uartclk = 921600 * 16, - .fifosize = 64, - .ops = &serial_pxa_pops, - .line = 3, - }, - } -}; - static struct uart_driver serial_pxa_reg = { .owner = THIS_MODULE, .driver_name = "PXA serial", .dev_name = "ttyS", .major = TTY_MAJOR, .minor = 64, - .nr = ARRAY_SIZE(serial_pxa_ports), + .nr = 4, .cons = PXA_CONSOLE, }; @@ -806,10 +739,60 @@ static int serial_pxa_resume(struct platform_device *dev) static int serial_pxa_probe(struct platform_device *dev) { - serial_pxa_ports[dev->id].port.dev = &dev->dev; - uart_add_one_port(&serial_pxa_reg, &serial_pxa_ports[dev->id].port); - platform_set_drvdata(dev, &serial_pxa_ports[dev->id]); + struct uart_pxa_port *sport; + struct resource *mmres, *irqres; + int ret; + + mmres = platform_get_resource(dev, IORESOURCE_MEM, 0); + irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0); + if (!mmres || !irqres) + return -ENODEV; + + sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL); + if (!sport) + return -ENOMEM; + + sport->port.type = PORT_PXA; + sport->port.iotype = UPIO_MEM; + sport->port.mapbase = mmres->start; + sport->port.irq = irqres->start; + sport->port.fifosize = 64; + sport->port.ops = &serial_pxa_pops; + sport->port.line = dev->id; + sport->port.dev = &dev->dev; + sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; + sport->port.uartclk = 921600 * 16; + + /* + * Is it worth keeping this? + */ + if (mmres->start == __PREG(FFUART)) + sport->name = "FFUART"; + else if (mmres->start == __PREG(BTUART)) + sport->name = "BTUART"; + else if (mmres->start == __PREG(STUART)) + sport->name = "STUART"; + else if (mmres->start == __PREG(HWUART)) + sport->name = "HWUART"; + else + sport->name = "???"; + + sport->port.membase = ioremap(mmres->start, mmres->end - mmres->start + 1); + if (!sport->port.membase) { + ret = -ENOMEM; + goto err_free; + } + + serial_pxa_ports[dev->id] = sport; + + uart_add_one_port(&serial_pxa_reg, &sport->port); + platform_set_drvdata(dev, sport); + return 0; + + err_free: + kfree(sport); + return ret; } static int serial_pxa_remove(struct platform_device *dev) @@ -818,8 +801,8 @@ static int serial_pxa_remove(struct platform_device *dev) platform_set_drvdata(dev, NULL); - if (sport) - uart_remove_one_port(&serial_pxa_reg, &sport->port); + uart_remove_one_port(&serial_pxa_reg, &sport->port); + kfree(sport); return 0; } -- cgit v1.1 From b049bd9de4959dd9e4b586d14b6de450a52c6f1f Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 20 Aug 2007 10:28:15 +0100 Subject: [ARM] pxa: update pxa serial driver to use clk support Signed-off-by: Russell King --- drivers/serial/pxa.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) (limited to 'drivers/serial') diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c index 59889f6..af3a011 100644 --- a/drivers/serial/pxa.c +++ b/drivers/serial/pxa.c @@ -42,6 +42,7 @@ #include #include #include +#include #include #include @@ -55,7 +56,7 @@ struct uart_pxa_port { unsigned char lcr; unsigned char mcr; unsigned int lsr_break_flag; - unsigned int cken; + struct clk *clk; char *name; }; @@ -351,6 +352,8 @@ static int serial_pxa_startup(struct uart_port *port) else up->mcr = 0; + up->port.uartclk = clk_get_rate(up->clk); + /* * Allocate the IRQ */ @@ -546,9 +549,11 @@ serial_pxa_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { struct uart_pxa_port *up = (struct uart_pxa_port *)port; - pxa_set_cken(up->cken, !state); + if (!state) - udelay(1); + clk_enable(up->clk); + else + clk_disable(up->clk); } static void serial_pxa_release_port(struct uart_port *port) @@ -635,6 +640,8 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count) struct uart_pxa_port *up = serial_pxa_ports[co->index]; unsigned int ier; + clk_enable(up->clk); + /* * First save the IER then disable the interrupts */ @@ -649,6 +656,8 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count) */ wait_for_xmitr(up); serial_out(up, UART_IER, ier); + + clk_disable(up->clk); } static int __init @@ -752,6 +761,12 @@ static int serial_pxa_probe(struct platform_device *dev) if (!sport) return -ENOMEM; + sport->clk = clk_get(&dev->dev, "UARTCLK"); + if (IS_ERR(sport->clk)) { + ret = PTR_ERR(sport->clk); + goto err_free; + } + sport->port.type = PORT_PXA; sport->port.iotype = UPIO_MEM; sport->port.mapbase = mmres->start; @@ -761,7 +776,7 @@ static int serial_pxa_probe(struct platform_device *dev) sport->port.line = dev->id; sport->port.dev = &dev->dev; sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; - sport->port.uartclk = 921600 * 16; + sport->port.uartclk = clk_get_rate(sport->clk); /* * Is it worth keeping this? @@ -780,7 +795,7 @@ static int serial_pxa_probe(struct platform_device *dev) sport->port.membase = ioremap(mmres->start, mmres->end - mmres->start + 1); if (!sport->port.membase) { ret = -ENOMEM; - goto err_free; + goto err_clk; } serial_pxa_ports[dev->id] = sport; @@ -790,6 +805,8 @@ static int serial_pxa_probe(struct platform_device *dev) return 0; + err_clk: + clk_put(sport->clk); err_free: kfree(sport); return ret; @@ -802,6 +819,7 @@ static int serial_pxa_remove(struct platform_device *dev) platform_set_drvdata(dev, NULL); uart_remove_one_port(&serial_pxa_reg, &sport->port); + clk_put(sport->clk); kfree(sport); return 0; -- cgit v1.1 From 97d97224ff361e08777fb33e0fd193ca877dac28 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 1 Sep 2007 21:25:09 +0100 Subject: [SERIAL] Fix console initialisation ordering Ensure pm callback is called upon initialisation to place port in correct power saving state. Ensure console is initialised prior to deciding whether to power down the port. Signed-off-by: Russell King --- drivers/serial/serial_core.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'drivers/serial') diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index a055f58..a3bd3a3 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -2127,6 +2127,14 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state, spin_unlock_irqrestore(&port->lock, flags); /* + * If this driver supports console, and it hasn't been + * successfully registered yet, try to re-register it. + * It may be that the port was not available. + */ + if (port->cons && !(port->cons->flags & CON_ENABLED)) + register_console(port->cons); + + /* * Power down all ports by default, except the * console if we have one. */ @@ -2286,6 +2294,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port) } state->port = port; + state->pm_state = -1; port->cons = drv->cons; port->info = state->info; @@ -2308,15 +2317,6 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port) tty_register_device(drv->tty_driver, port->line, port->dev); /* - * If this driver supports console, and it hasn't been - * successfully registered yet, try to re-register it. - * It may be that the port was not available. - */ - if (port->type != PORT_UNKNOWN && - port->cons && !(port->cons->flags & CON_ENABLED)) - register_console(port->cons); - - /* * Ensure UPF_DEAD is not set. */ port->flags &= ~UPF_DEAD; -- cgit v1.1