serial: bfin_5xx: move resources into board files
Rather than maintain Kconfig entries where people have to enter raw
numbers and hardcode lists of addresses/pins in the driver itself,
push it all to platform resources. This lets us simplify the driver,
the Kconfig, and gives board porters greater flexibility.
In the process, we need to also start supporting the early platform
interface. Not a big deal, but it causes the patch to be bigger than
a simple resource relocation.
All the Blackfin boards already have their resources updated and in
place for this change.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 19cac9f..e381b89 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -1,7 +1,7 @@
/*
* Blackfin On-Chip Serial Driver
*
- * Copyright 2006-2008 Analog Devices Inc.
+ * Copyright 2006-2010 Analog Devices Inc.
*
* Enter bugs at http://blackfin.uclinux.org/
*
@@ -12,6 +12,9 @@
#define SUPPORT_SYSRQ
#endif
+#define DRIVER_NAME "bfin-uart"
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/gfp.h>
@@ -23,21 +26,20 @@
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/kgdb.h>
+#include <linux/slab.h>
#include <linux/dma-mapping.h>
-#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
- defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
-#include <linux/kgdb.h>
-#include <asm/irq_regs.h>
-#endif
-
-#include <asm/gpio.h>
-#include <mach/bfin_serial_5xx.h>
-
-#include <asm/dma.h>
-#include <asm/io.h>
-#include <asm/irq.h>
+#include <asm/portmux.h>
#include <asm/cacheflush.h>
+#include <asm/dma.h>
+
+#define port_membase(uart) (((struct bfin_serial_port *)(uart))->port.membase)
+#define get_lsr_cache(uart) (((struct bfin_serial_port *)(uart))->lsr)
+#define put_lsr_cache(uart, v) (((struct bfin_serial_port *)(uart))->lsr = (v))
+#include <asm/bfin_serial.h>
#ifdef CONFIG_SERIAL_BFIN_MODULE
# undef CONFIG_EARLY_PRINTK
@@ -48,12 +50,11 @@
#endif
/* UART name and device definitions */
-#define BFIN_SERIAL_NAME "ttyBF"
+#define BFIN_SERIAL_DEV_NAME "ttyBF"
#define BFIN_SERIAL_MAJOR 204
#define BFIN_SERIAL_MINOR 64
-static struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
-static int nr_active_ports = ARRAY_SIZE(bfin_serial_resource);
+static struct bfin_serial_port *bfin_serial_ports[BFIN_UART_NR_PORTS];
#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
@@ -743,14 +744,14 @@
}
}
if (uart->rts_pin >= 0) {
- gpio_request(uart->rts_pin, DRIVER_NAME);
gpio_direction_output(uart->rts_pin, 0);
}
#endif
#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
- if (request_irq(uart->status_irq,
+ if (uart->cts_pin >= 0 && request_irq(uart->status_irq,
bfin_serial_mctrl_cts_int,
IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) {
+ uart->cts_pin = -1;
pr_info("Unable to attach BlackFin UART Modem Status interrupt.\n");
}
@@ -796,11 +797,9 @@
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
if (uart->cts_pin >= 0)
free_irq(gpio_to_irq(uart->cts_pin), uart);
- if (uart->rts_pin >= 0)
- gpio_free(uart->rts_pin);
#endif
#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
- if (UART_GET_IER(uart) & EDSSI)
+ if (uart->cts_pin >= 0)
free_irq(uart->status_irq, uart);
#endif
}
@@ -962,33 +961,33 @@
*/
static void bfin_serial_set_ldisc(struct uart_port *port, int ld)
{
- int line = port->line;
+ struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
unsigned short val;
switch (ld) {
case N_IRDA:
- val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val = UART_GET_GCTL(uart);
val |= (IREN | RPOLC);
- UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ UART_PUT_GCTL(uart, val);
break;
default:
- val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val = UART_GET_GCTL(uart);
val &= ~(IREN | RPOLC);
- UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ UART_PUT_GCTL(uart, val);
}
}
static void bfin_serial_reset_irda(struct uart_port *port)
{
- int line = port->line;
+ struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
unsigned short val;
- val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val = UART_GET_GCTL(uart);
val &= ~(IREN | RPOLC);
- UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ UART_PUT_GCTL(uart, val);
SSYNC();
val |= (IREN | RPOLC);
- UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ UART_PUT_GCTL(uart, val);
SSYNC();
}
@@ -1070,85 +1069,6 @@
#endif
};
-static void __init bfin_serial_hw_init(void)
-{
-#ifdef CONFIG_SERIAL_BFIN_UART0
- peripheral_request(P_UART0_TX, DRIVER_NAME);
- peripheral_request(P_UART0_RX, DRIVER_NAME);
-#endif
-
-#ifdef CONFIG_SERIAL_BFIN_UART1
- peripheral_request(P_UART1_TX, DRIVER_NAME);
- peripheral_request(P_UART1_RX, DRIVER_NAME);
-
-# if defined(CONFIG_BFIN_UART1_CTSRTS) && defined(CONFIG_BF54x)
- peripheral_request(P_UART1_RTS, DRIVER_NAME);
- peripheral_request(P_UART1_CTS, DRIVER_NAME);
-# endif
-#endif
-
-#ifdef CONFIG_SERIAL_BFIN_UART2
- peripheral_request(P_UART2_TX, DRIVER_NAME);
- peripheral_request(P_UART2_RX, DRIVER_NAME);
-#endif
-
-#ifdef CONFIG_SERIAL_BFIN_UART3
- peripheral_request(P_UART3_TX, DRIVER_NAME);
- peripheral_request(P_UART3_RX, DRIVER_NAME);
-
-# if defined(CONFIG_BFIN_UART3_CTSRTS) && defined(CONFIG_BF54x)
- peripheral_request(P_UART3_RTS, DRIVER_NAME);
- peripheral_request(P_UART3_CTS, DRIVER_NAME);
-# endif
-#endif
-}
-
-static void __init bfin_serial_init_ports(void)
-{
- static int first = 1;
- int i;
-
- if (!first)
- return;
- first = 0;
-
- bfin_serial_hw_init();
-
- for (i = 0; i < nr_active_ports; i++) {
- spin_lock_init(&bfin_serial_ports[i].port.lock);
- bfin_serial_ports[i].port.uartclk = get_sclk();
- bfin_serial_ports[i].port.fifosize = BFIN_UART_TX_FIFO_SIZE;
- bfin_serial_ports[i].port.ops = &bfin_serial_pops;
- bfin_serial_ports[i].port.line = i;
- bfin_serial_ports[i].port.iotype = UPIO_MEM;
- bfin_serial_ports[i].port.membase =
- (void __iomem *)bfin_serial_resource[i].uart_base_addr;
- bfin_serial_ports[i].port.mapbase =
- bfin_serial_resource[i].uart_base_addr;
- bfin_serial_ports[i].port.irq =
- bfin_serial_resource[i].uart_irq;
- bfin_serial_ports[i].status_irq =
- bfin_serial_resource[i].uart_status_irq;
- bfin_serial_ports[i].port.flags = UPF_BOOT_AUTOCONF;
-#ifdef CONFIG_SERIAL_BFIN_DMA
- bfin_serial_ports[i].tx_done = 1;
- bfin_serial_ports[i].tx_count = 0;
- bfin_serial_ports[i].tx_dma_channel =
- bfin_serial_resource[i].uart_tx_dma_channel;
- bfin_serial_ports[i].rx_dma_channel =
- bfin_serial_resource[i].uart_rx_dma_channel;
- init_timer(&(bfin_serial_ports[i].rx_dma_timer));
-#endif
-#if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
- defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
- bfin_serial_ports[i].cts_pin =
- bfin_serial_resource[i].uart_cts_pin;
- bfin_serial_ports[i].rts_pin =
- bfin_serial_resource[i].uart_rts_pin;
-#endif
- }
-}
-
#if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
/*
* If the port was already initialised (eg, by a boot loader),
@@ -1196,6 +1116,34 @@
static struct uart_driver bfin_serial_reg;
+static void bfin_serial_console_putchar(struct uart_port *port, int ch)
+{
+ struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
+ while (!(UART_GET_LSR(uart) & THRE))
+ barrier();
+ UART_PUT_CHAR(uart, ch);
+}
+
+#endif /* defined (CONFIG_SERIAL_BFIN_CONSOLE) ||
+ defined (CONFIG_EARLY_PRINTK) */
+
+#ifdef CONFIG_SERIAL_BFIN_CONSOLE
+#define CLASS_BFIN_CONSOLE "bfin-console"
+/*
+ * Interrupts are disabled on entering
+ */
+static void
+bfin_serial_console_write(struct console *co, const char *s, unsigned int count)
+{
+ struct bfin_serial_port *uart = bfin_serial_ports[co->index];
+ unsigned long flags;
+
+ spin_lock_irqsave(&uart->port.lock, flags);
+ uart_console_write(&uart->port, s, count, bfin_serial_console_putchar);
+ spin_unlock_irqrestore(&uart->port.lock, flags);
+
+}
+
static int __init
bfin_serial_console_setup(struct console *co, char *options)
{
@@ -1215,9 +1163,12 @@
* if so, search for the first available port that does have
* console support.
*/
- if (co->index == -1 || co->index >= nr_active_ports)
- co->index = 0;
- uart = &bfin_serial_ports[co->index];
+ if (co->index < 0 || co->index >= BFIN_UART_NR_PORTS)
+ return -ENODEV;
+
+ uart = bfin_serial_ports[co->index];
+ if (!uart)
+ return -ENODEV;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
@@ -1226,36 +1177,9 @@
return uart_set_options(&uart->port, co, baud, parity, bits, flow);
}
-#endif /* defined (CONFIG_SERIAL_BFIN_CONSOLE) ||
- defined (CONFIG_EARLY_PRINTK) */
-
-#ifdef CONFIG_SERIAL_BFIN_CONSOLE
-static void bfin_serial_console_putchar(struct uart_port *port, int ch)
-{
- struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- while (!(UART_GET_LSR(uart) & THRE))
- barrier();
- UART_PUT_CHAR(uart, ch);
- SSYNC();
-}
-
-/*
- * Interrupts are disabled on entering
- */
-static void
-bfin_serial_console_write(struct console *co, const char *s, unsigned int count)
-{
- struct bfin_serial_port *uart = &bfin_serial_ports[co->index];
- unsigned long flags;
-
- spin_lock_irqsave(&uart->port.lock, flags);
- uart_console_write(&uart->port, s, count, bfin_serial_console_putchar);
- spin_unlock_irqrestore(&uart->port.lock, flags);
-
-}
static struct console bfin_serial_console = {
- .name = BFIN_SERIAL_NAME,
+ .name = BFIN_SERIAL_DEV_NAME,
.write = bfin_serial_console_write,
.device = uart_console_device,
.setup = bfin_serial_console_setup,
@@ -1263,44 +1187,30 @@
.index = -1,
.data = &bfin_serial_reg,
};
-
-static int __init bfin_serial_rs_console_init(void)
-{
- bfin_serial_init_ports();
- register_console(&bfin_serial_console);
-
- return 0;
-}
-console_initcall(bfin_serial_rs_console_init);
-
#define BFIN_SERIAL_CONSOLE &bfin_serial_console
#else
#define BFIN_SERIAL_CONSOLE NULL
#endif /* CONFIG_SERIAL_BFIN_CONSOLE */
+#ifdef CONFIG_EARLY_PRINTK
+static struct bfin_serial_port bfin_earlyprintk_port;
+#define CLASS_BFIN_EARLYPRINTK "bfin-earlyprintk"
-#ifdef CONFIG_EARLY_PRINTK
-static __init void early_serial_putc(struct uart_port *port, int ch)
+/*
+ * Interrupts are disabled on entering
+ */
+static void
+bfin_earlyprintk_console_write(struct console *co, const char *s, unsigned int count)
{
- unsigned timeout = 0xffff;
- struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
+ unsigned long flags;
- while ((!(UART_GET_LSR(uart) & THRE)) && --timeout)
- cpu_relax();
- UART_PUT_CHAR(uart, ch);
-}
+ if (bfin_earlyprintk_port.port.line != co->index)
+ return;
-static __init void early_serial_write(struct console *con, const char *s,
- unsigned int n)
-{
- struct bfin_serial_port *uart = &bfin_serial_ports[con->index];
- unsigned int i;
-
- for (i = 0; i < n; i++, s++) {
- if (*s == '\n')
- early_serial_putc(&uart->port, '\r');
- early_serial_putc(&uart->port, *s);
- }
+ spin_lock_irqsave(&bfin_earlyprintk_port.port.lock, flags);
+ uart_console_write(&bfin_earlyprintk_port.port, s, count,
+ bfin_serial_console_putchar);
+ spin_unlock_irqrestore(&bfin_earlyprintk_port.port.lock, flags);
}
/*
@@ -1311,18 +1221,326 @@
*/
static struct __initdata console bfin_early_serial_console = {
.name = "early_BFuart",
- .write = early_serial_write,
+ .write = bfin_earlyprintk_console_write,
.device = uart_console_device,
.flags = CON_PRINTBUFFER,
.index = -1,
.data = &bfin_serial_reg,
};
+#endif
+
+static struct uart_driver bfin_serial_reg = {
+ .owner = THIS_MODULE,
+ .driver_name = DRIVER_NAME,
+ .dev_name = BFIN_SERIAL_DEV_NAME,
+ .major = BFIN_SERIAL_MAJOR,
+ .minor = BFIN_SERIAL_MINOR,
+ .nr = BFIN_UART_NR_PORTS,
+ .cons = BFIN_SERIAL_CONSOLE,
+};
+
+static int bfin_serial_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct bfin_serial_port *uart = platform_get_drvdata(pdev);
+
+ return uart_suspend_port(&bfin_serial_reg, &uart->port);
+}
+
+static int bfin_serial_resume(struct platform_device *pdev)
+{
+ struct bfin_serial_port *uart = platform_get_drvdata(pdev);
+
+ return uart_resume_port(&bfin_serial_reg, &uart->port);
+}
+
+static int bfin_serial_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct bfin_serial_port *uart = NULL;
+ int ret = 0;
+
+ if (pdev->id < 0 || pdev->id >= BFIN_UART_NR_PORTS) {
+ dev_err(&pdev->dev, "Wrong bfin uart platform device id.\n");
+ return -ENOENT;
+ }
+
+ if (bfin_serial_ports[pdev->id] == NULL) {
+
+ uart = kzalloc(sizeof(*uart), GFP_KERNEL);
+ if (!uart) {
+ dev_err(&pdev->dev,
+ "fail to malloc bfin_serial_port\n");
+ return -ENOMEM;
+ }
+ bfin_serial_ports[pdev->id] = uart;
+
+#ifdef CONFIG_EARLY_PRINTK
+ if (!(bfin_earlyprintk_port.port.membase
+ && bfin_earlyprintk_port.port.line == pdev->id)) {
+ /*
+ * If the peripheral PINs of current port is allocated
+ * in earlyprintk probe stage, don't do it again.
+ */
+#endif
+ ret = peripheral_request_list(
+ (unsigned short *)pdev->dev.platform_data, DRIVER_NAME);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "fail to request bfin serial peripherals\n");
+ goto out_error_free_mem;
+ }
+#ifdef CONFIG_EARLY_PRINTK
+ }
+#endif
+
+ spin_lock_init(&uart->port.lock);
+ uart->port.uartclk = get_sclk();
+ uart->port.fifosize = BFIN_UART_TX_FIFO_SIZE;
+ uart->port.ops = &bfin_serial_pops;
+ uart->port.line = pdev->id;
+ uart->port.iotype = UPIO_MEM;
+ uart->port.flags = UPF_BOOT_AUTOCONF;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n");
+ ret = -ENOENT;
+ goto out_error_free_peripherals;
+ }
+
+ uart->port.membase = ioremap(res->start,
+ res->end - res->start);
+ if (!uart->port.membase) {
+ dev_err(&pdev->dev, "Cannot map uart IO\n");
+ ret = -ENXIO;
+ goto out_error_free_peripherals;
+ }
+ uart->port.mapbase = res->start;
+
+ uart->port.irq = platform_get_irq(pdev, 0);
+ if (uart->port.irq < 0) {
+ dev_err(&pdev->dev, "No uart RX/TX IRQ specified\n");
+ ret = -ENOENT;
+ goto out_error_unmap;
+ }
+
+ uart->status_irq = platform_get_irq(pdev, 1);
+ if (uart->status_irq < 0) {
+ dev_err(&pdev->dev, "No uart status IRQ specified\n");
+ ret = -ENOENT;
+ goto out_error_unmap;
+ }
+
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ uart->tx_done = 1;
+ uart->tx_count = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "No uart TX DMA channel specified\n");
+ ret = -ENOENT;
+ goto out_error_unmap;
+ }
+ uart->tx_dma_channel = res->start;
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "No uart RX DMA channel specified\n");
+ ret = -ENOENT;
+ goto out_error_unmap;
+ }
+ uart->rx_dma_channel = res->start;
+
+ init_timer(&(uart->rx_dma_timer));
+#endif
+
+#if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
+ defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (res == NULL)
+ uart->cts_pin = -1;
+ else
+ uart->cts_pin = res->start;
+
+ res = platform_get_resource(pdev, IORESOURCE_IO, 1);
+ if (res == NULL)
+ uart->rts_pin = -1;
+ else
+ uart->rts_pin = res->start;
+# if defined(CONFIG_SERIAL_BFIN_CTSRTS)
+ if (uart->rts_pin >= 0)
+ gpio_request(uart->rts_pin, DRIVER_NAME);
+# endif
+#endif
+ }
+
+#ifdef CONFIG_SERIAL_BFIN_CONSOLE
+ if (!is_early_platform_device(pdev)) {
+#endif
+ uart = bfin_serial_ports[pdev->id];
+ uart->port.dev = &pdev->dev;
+ dev_set_drvdata(&pdev->dev, uart);
+ ret = uart_add_one_port(&bfin_serial_reg, &uart->port);
+#ifdef CONFIG_SERIAL_BFIN_CONSOLE
+ }
+#endif
+
+ if (!ret)
+ return 0;
+
+ if (uart) {
+out_error_unmap:
+ iounmap(uart->port.membase);
+out_error_free_peripherals:
+ peripheral_free_list(
+ (unsigned short *)pdev->dev.platform_data);
+out_error_free_mem:
+ kfree(uart);
+ bfin_serial_ports[pdev->id] = NULL;
+ }
+
+ return ret;
+}
+
+static int __devexit bfin_serial_remove(struct platform_device *pdev)
+{
+ struct bfin_serial_port *uart = platform_get_drvdata(pdev);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ if (uart) {
+ uart_remove_one_port(&bfin_serial_reg, &uart->port);
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ if (uart->rts_pin >= 0)
+ gpio_free(uart->rts_pin);
+#endif
+ iounmap(uart->port.membase);
+ peripheral_free_list(
+ (unsigned short *)pdev->dev.platform_data);
+ kfree(uart);
+ bfin_serial_ports[pdev->id] = NULL;
+ }
+
+ return 0;
+}
+
+static struct platform_driver bfin_serial_driver = {
+ .probe = bfin_serial_probe,
+ .remove = __devexit_p(bfin_serial_remove),
+ .suspend = bfin_serial_suspend,
+ .resume = bfin_serial_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+#if defined(CONFIG_SERIAL_BFIN_CONSOLE)
+static __initdata struct early_platform_driver early_bfin_serial_driver = {
+ .class_str = CLASS_BFIN_CONSOLE,
+ .pdrv = &bfin_serial_driver,
+ .requested_id = EARLY_PLATFORM_ID_UNSET,
+};
+
+static int __init bfin_serial_rs_console_init(void)
+{
+ early_platform_driver_register(&early_bfin_serial_driver, DRIVER_NAME);
+
+ early_platform_driver_probe(CLASS_BFIN_CONSOLE, BFIN_UART_NR_PORTS, 0);
+
+ register_console(&bfin_serial_console);
+
+ return 0;
+}
+console_initcall(bfin_serial_rs_console_init);
+#endif
+
+#ifdef CONFIG_EARLY_PRINTK
+/*
+ * Memory can't be allocated dynamically during earlyprink init stage.
+ * So, do individual probe for earlyprink with a static uart port variable.
+ */
+static int bfin_earlyprintk_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ int ret;
+
+ if (pdev->id < 0 || pdev->id >= BFIN_UART_NR_PORTS) {
+ dev_err(&pdev->dev, "Wrong earlyprintk platform device id.\n");
+ return -ENOENT;
+ }
+
+ ret = peripheral_request_list(
+ (unsigned short *)pdev->dev.platform_data, DRIVER_NAME);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "fail to request bfin serial peripherals\n");
+ return ret;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n");
+ ret = -ENOENT;
+ goto out_error_free_peripherals;
+ }
+
+ bfin_earlyprintk_port.port.membase = ioremap(res->start,
+ res->end - res->start);
+ if (!bfin_earlyprintk_port.port.membase) {
+ dev_err(&pdev->dev, "Cannot map uart IO\n");
+ ret = -ENXIO;
+ goto out_error_free_peripherals;
+ }
+ bfin_earlyprintk_port.port.mapbase = res->start;
+ bfin_earlyprintk_port.port.line = pdev->id;
+ bfin_earlyprintk_port.port.uartclk = get_sclk();
+ bfin_earlyprintk_port.port.fifosize = BFIN_UART_TX_FIFO_SIZE;
+ spin_lock_init(&bfin_earlyprintk_port.port.lock);
+
+ return 0;
+
+out_error_free_peripherals:
+ peripheral_free_list(
+ (unsigned short *)pdev->dev.platform_data);
+
+ return ret;
+}
+
+static struct platform_driver bfin_earlyprintk_driver = {
+ .probe = bfin_earlyprintk_probe,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static __initdata struct early_platform_driver early_bfin_earlyprintk_driver = {
+ .class_str = CLASS_BFIN_EARLYPRINTK,
+ .pdrv = &bfin_earlyprintk_driver,
+ .requested_id = EARLY_PLATFORM_ID_UNSET,
+};
struct console __init *bfin_earlyserial_init(unsigned int port,
unsigned int cflag)
{
- struct bfin_serial_port *uart;
struct ktermios t;
+ char port_name[20];
+
+ if (port < 0 || port >= BFIN_UART_NR_PORTS)
+ return NULL;
+
+ /*
+ * Only probe resource of the given port in earlyprintk boot arg.
+ * The expected port id should be indicated in port name string.
+ */
+ snprintf(port_name, 20, DRIVER_NAME ".%d", port);
+ early_platform_driver_register(&early_bfin_earlyprintk_driver,
+ port_name);
+ early_platform_driver_probe(CLASS_BFIN_EARLYPRINTK, 1, 0);
+
+ if (!bfin_earlyprintk_port.port.membase)
+ return NULL;
#ifdef CONFIG_SERIAL_BFIN_CONSOLE
/*
@@ -1332,124 +1550,36 @@
bfin_serial_console.flags &= ~CON_PRINTBUFFER;
#endif
- if (port == -1 || port >= nr_active_ports)
- port = 0;
- bfin_serial_init_ports();
bfin_early_serial_console.index = port;
- uart = &bfin_serial_ports[port];
t.c_cflag = cflag;
t.c_iflag = 0;
t.c_oflag = 0;
t.c_lflag = ICANON;
t.c_line = port;
- bfin_serial_set_termios(&uart->port, &t, &t);
+ bfin_serial_set_termios(&bfin_earlyprintk_port.port, &t, &t);
+
return &bfin_early_serial_console;
}
-
#endif /* CONFIG_EARLY_PRINTK */
-static struct uart_driver bfin_serial_reg = {
- .owner = THIS_MODULE,
- .driver_name = "bfin-uart",
- .dev_name = BFIN_SERIAL_NAME,
- .major = BFIN_SERIAL_MAJOR,
- .minor = BFIN_SERIAL_MINOR,
- .nr = BFIN_UART_NR_PORTS,
- .cons = BFIN_SERIAL_CONSOLE,
-};
-
-static int bfin_serial_suspend(struct platform_device *dev, pm_message_t state)
-{
- int i;
-
- for (i = 0; i < nr_active_ports; i++) {
- if (bfin_serial_ports[i].port.dev != &dev->dev)
- continue;
- uart_suspend_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
- }
-
- return 0;
-}
-
-static int bfin_serial_resume(struct platform_device *dev)
-{
- int i;
-
- for (i = 0; i < nr_active_ports; i++) {
- if (bfin_serial_ports[i].port.dev != &dev->dev)
- continue;
- uart_resume_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
- }
-
- return 0;
-}
-
-static int bfin_serial_probe(struct platform_device *dev)
-{
- struct resource *res = dev->resource;
- int i;
-
- for (i = 0; i < dev->num_resources; i++, res++)
- if (res->flags & IORESOURCE_MEM)
- break;
-
- if (i < dev->num_resources) {
- for (i = 0; i < nr_active_ports; i++, res++) {
- if (bfin_serial_ports[i].port.mapbase != res->start)
- continue;
- bfin_serial_ports[i].port.dev = &dev->dev;
- uart_add_one_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
- }
- }
-
- return 0;
-}
-
-static int bfin_serial_remove(struct platform_device *dev)
-{
- int i;
-
- for (i = 0; i < nr_active_ports; i++) {
- if (bfin_serial_ports[i].port.dev != &dev->dev)
- continue;
- uart_remove_one_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
- bfin_serial_ports[i].port.dev = NULL;
-#if defined(CONFIG_SERIAL_BFIN_CTSRTS)
- gpio_free(bfin_serial_ports[i].cts_pin);
- gpio_free(bfin_serial_ports[i].rts_pin);
-#endif
- }
-
- return 0;
-}
-
-static struct platform_driver bfin_serial_driver = {
- .probe = bfin_serial_probe,
- .remove = bfin_serial_remove,
- .suspend = bfin_serial_suspend,
- .resume = bfin_serial_resume,
- .driver = {
- .name = "bfin-uart",
- .owner = THIS_MODULE,
- },
-};
-
static int __init bfin_serial_init(void)
{
int ret;
- pr_info("Serial: Blackfin serial driver\n");
-
- bfin_serial_init_ports();
+ pr_info("Blackfin serial driver\n");
ret = uart_register_driver(&bfin_serial_reg);
- if (ret == 0) {
- ret = platform_driver_register(&bfin_serial_driver);
- if (ret) {
- pr_debug("uart register failed\n");
- uart_unregister_driver(&bfin_serial_reg);
- }
+ if (ret) {
+ pr_err("failed to register %s:%d\n",
+ bfin_serial_reg.driver_name, ret);
}
+
+ ret = platform_driver_register(&bfin_serial_driver);
+ if (ret) {
+ pr_err("fail to register bfin uart\n");
+ uart_unregister_driver(&bfin_serial_reg);
+ }
+
return ret;
}
@@ -1463,7 +1593,7 @@
module_init(bfin_serial_init);
module_exit(bfin_serial_exit);
-MODULE_AUTHOR("Aubrey.Li <aubrey.li@analog.com>");
+MODULE_AUTHOR("Sonic Zhang, Aubrey Li");
MODULE_DESCRIPTION("Blackfin generic serial port driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV_MAJOR(BFIN_SERIAL_MAJOR);