diff options
Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
-rw-r--r-- | arch/arm/mach-omap2/serial.c | 197 |
1 files changed, 134 insertions, 63 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index c0bea75f13f8..ce22344b94e7 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -54,6 +54,7 @@ struct omap_uart_state { struct plat_serial8250_port *p; struct list_head node; + struct platform_device pdev; #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) int context_valid; @@ -68,10 +69,9 @@ struct omap_uart_state { #endif }; -static struct omap_uart_state omap_uart[OMAP_MAX_NR_PORTS]; static LIST_HEAD(uart_list); -static struct plat_serial8250_port serial_platform_data[] = { +static struct plat_serial8250_port serial_platform_data0[] = { { .membase = IO_ADDRESS(OMAP_UART1_BASE), .mapbase = OMAP_UART1_BASE, @@ -81,6 +81,12 @@ static struct plat_serial8250_port serial_platform_data[] = { .regshift = 2, .uartclk = OMAP24XX_BASE_BAUD * 16, }, { + .flags = 0 + } +}; + +static struct plat_serial8250_port serial_platform_data1[] = { + { .membase = IO_ADDRESS(OMAP_UART2_BASE), .mapbase = OMAP_UART2_BASE, .irq = 73, @@ -89,6 +95,12 @@ static struct plat_serial8250_port serial_platform_data[] = { .regshift = 2, .uartclk = OMAP24XX_BASE_BAUD * 16, }, { + .flags = 0 + } +}; + +static struct plat_serial8250_port serial_platform_data2[] = { + { .membase = IO_ADDRESS(OMAP_UART3_BASE), .mapbase = OMAP_UART3_BASE, .irq = 74, @@ -227,6 +239,40 @@ static inline void omap_uart_disable_clocks(struct omap_uart_state *uart) clk_disable(uart->fck); } +static void omap_uart_enable_wakeup(struct omap_uart_state *uart) +{ + /* Set wake-enable bit */ + if (uart->wk_en && uart->wk_mask) { + u32 v = __raw_readl(uart->wk_en); + v |= uart->wk_mask; + __raw_writel(v, uart->wk_en); + } + + /* Ensure IOPAD wake-enables are set */ + if (cpu_is_omap34xx() && uart->padconf) { + u16 v = omap_ctrl_readw(uart->padconf); + v |= OMAP3_PADCONF_WAKEUPENABLE0; + omap_ctrl_writew(v, uart->padconf); + } +} + +static void omap_uart_disable_wakeup(struct omap_uart_state *uart) +{ + /* Clear wake-enable bit */ + if (uart->wk_en && uart->wk_mask) { + u32 v = __raw_readl(uart->wk_en); + v &= ~uart->wk_mask; + __raw_writel(v, uart->wk_en); + } + + /* Ensure IOPAD wake-enables are cleared */ + if (cpu_is_omap34xx() && uart->padconf) { + u16 v = omap_ctrl_readw(uart->padconf); + v &= ~OMAP3_PADCONF_WAKEUPENABLE0; + omap_ctrl_writew(v, uart->padconf); + } +} + static void omap_uart_smart_idle_enable(struct omap_uart_state *uart, int enable) { @@ -256,6 +302,11 @@ static void omap_uart_block_sleep(struct omap_uart_state *uart) static void omap_uart_allow_sleep(struct omap_uart_state *uart) { + if (device_may_wakeup(&uart->pdev.dev)) + omap_uart_enable_wakeup(uart); + else + omap_uart_disable_wakeup(uart); + if (!uart->clocked) return; @@ -302,7 +353,6 @@ void omap_uart_resume_idle(int num) /* Check for normal UART wakeup */ if (__raw_readl(uart->wk_st) & uart->wk_mask) omap_uart_block_sleep(uart); - return; } } @@ -356,16 +406,13 @@ static irqreturn_t omap_uart_interrupt(int irq, void *dev_id) return IRQ_NONE; } -static u32 sleep_timeout = DEFAULT_TIMEOUT; - static void omap_uart_idle_init(struct omap_uart_state *uart) { - u32 v; struct plat_serial8250_port *p = uart->p; int ret; uart->can_sleep = 0; - uart->timeout = sleep_timeout; + uart->timeout = DEFAULT_TIMEOUT; setup_timer(&uart->timer, omap_uart_idle_timer, (unsigned long) uart); mod_timer(&uart->timer, jiffies + uart->timeout); @@ -423,76 +470,101 @@ static void omap_uart_idle_init(struct omap_uart_state *uart) uart->padconf = 0; } - /* Set wake-enable bit */ - if (uart->wk_en && uart->wk_mask) { - v = __raw_readl(uart->wk_en); - v |= uart->wk_mask; - __raw_writel(v, uart->wk_en); - } - - /* Ensure IOPAD wake-enables are set */ - if (cpu_is_omap34xx() && uart->padconf) { - u16 v; - - v = omap_ctrl_readw(uart->padconf); - v |= OMAP3_PADCONF_WAKEUPENABLE0; - omap_ctrl_writew(v, uart->padconf); - } - p->flags |= UPF_SHARE_IRQ; ret = request_irq(p->irq, omap_uart_interrupt, IRQF_SHARED, "serial idle", (void *)uart); WARN_ON(ret); } -static ssize_t sleep_timeout_show(struct kobject *kobj, - struct kobj_attribute *attr, +void omap_uart_enable_irqs(int enable) +{ + int ret; + struct omap_uart_state *uart; + + list_for_each_entry(uart, &uart_list, node) { + if (enable) + ret = request_irq(uart->p->irq, omap_uart_interrupt, + IRQF_SHARED, "serial idle", (void *)uart); + else + free_irq(uart->p->irq, (void *)uart); + } +} + +static ssize_t sleep_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf) { - return sprintf(buf, "%u\n", sleep_timeout / HZ); + struct platform_device *pdev = container_of(dev, + struct platform_device, dev); + struct omap_uart_state *uart = container_of(pdev, + struct omap_uart_state, pdev); + + return sprintf(buf, "%u\n", uart->timeout / HZ); } -static ssize_t sleep_timeout_store(struct kobject *kobj, - struct kobj_attribute *attr, +static ssize_t sleep_timeout_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t n) { - struct omap_uart_state *uart; + struct platform_device *pdev = container_of(dev, + struct platform_device, dev); + struct omap_uart_state *uart = container_of(pdev, + struct omap_uart_state, pdev); unsigned int value; if (sscanf(buf, "%u", &value) != 1) { printk(KERN_ERR "sleep_timeout_store: Invalid value\n"); return -EINVAL; } - sleep_timeout = value * HZ; - list_for_each_entry(uart, &uart_list, node) { - uart->timeout = sleep_timeout; - if (uart->timeout) - mod_timer(&uart->timer, jiffies + uart->timeout); - else - /* A zero value means disable timeout feature */ - omap_uart_block_sleep(uart); - } + + uart->timeout = value * HZ; + if (uart->timeout) + mod_timer(&uart->timer, jiffies + uart->timeout); + else + /* A zero value means disable timeout feature */ + omap_uart_block_sleep(uart); + return n; } -static struct kobj_attribute sleep_timeout_attr = - __ATTR(sleep_timeout, 0644, sleep_timeout_show, sleep_timeout_store); - +DEVICE_ATTR(sleep_timeout, 0644, sleep_timeout_show, sleep_timeout_store); +#define DEV_CREATE_FILE(dev, attr) WARN_ON(device_create_file(dev, attr)) #else static inline void omap_uart_idle_init(struct omap_uart_state *uart) {} +#define DEV_CREATE_FILE(dev, attr) #endif /* CONFIG_PM */ -static struct platform_device serial_device = { - .name = "serial8250", - .id = PLAT8250_DEV_PLATFORM, - .dev = { - .platform_data = serial_platform_data, +static struct omap_uart_state omap_uart[OMAP_MAX_NR_PORTS] = { + { + .pdev = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = serial_platform_data0, + }, + }, + }, { + .pdev = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM1, + .dev = { + .platform_data = serial_platform_data1, + }, + }, + }, { + .pdev = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM2, + .dev = { + .platform_data = serial_platform_data2, + }, + }, }, }; void __init omap_serial_init(void) { - int i, err; + int i; const struct omap_uart_config *info; char name[16]; @@ -506,14 +578,12 @@ void __init omap_serial_init(void) if (info == NULL) return; - if (cpu_is_omap44xx()) { - for (i = 0; i < OMAP_MAX_NR_PORTS; i++) - serial_platform_data[i].irq += 32; - } for (i = 0; i < OMAP_MAX_NR_PORTS; i++) { - struct plat_serial8250_port *p = serial_platform_data + i; struct omap_uart_state *uart = &omap_uart[i]; + struct platform_device *pdev = &uart->pdev; + struct device *dev = &pdev->dev; + struct plat_serial8250_port *p = dev->platform_data; if (!(info->enabled_uarts & (1 << i))) { p->membase = NULL; @@ -541,20 +611,21 @@ void __init omap_serial_init(void) uart->num = i; p->private_data = uart; uart->p = p; - list_add(&uart->node, &uart_list); + list_add_tail(&uart->node, &uart_list); + + if (cpu_is_omap44xx()) + p->irq += 32; omap_uart_enable_clocks(uart); omap_uart_reset(uart); omap_uart_idle_init(uart); - } - - err = platform_device_register(&serial_device); - -#ifdef CONFIG_PM - if (!err) - err = sysfs_create_file(&serial_device.dev.kobj, - &sleep_timeout_attr.attr); -#endif + if (WARN_ON(platform_device_register(pdev))) + continue; + if ((cpu_is_omap34xx() && uart->padconf) || + (uart->wk_en && uart->wk_mask)) { + device_init_wakeup(dev, true); + DEV_CREATE_FILE(dev, &dev_attr_sleep_timeout); + } + } } - |