diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 20 | ||||
| -rw-r--r-- | drivers/serial/lpc32xx_hsuart.c | 103 | ||||
| -rw-r--r-- | drivers/serial/ns16550.c | 7 | ||||
| -rw-r--r-- | drivers/serial/serial-uclass.c | 4 |
4 files changed, 91 insertions, 43 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 1fc287ee98..04541c9ff3 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -15,6 +15,26 @@ config REQUIRE_SERIAL_CONSOLE during serial port initialization (default y). Set this to n on boards which have no debug serial port whatsoever. +config SERIAL_PRESENT + bool "Provide a serial driver" + depends on DM_SERIAL + default y + help + In very space-constrained devices even the full UART driver is too + large. In this case the debug UART can still be used in some cases. + This option enables the full UART in U-Boot, so if is it disabled, + the full UART driver will be omitted, thus saving space. + +config SPL_SERIAL_PRESENT + bool "Provide a serial driver in SPL" + depends on DM_SERIAL + default y + help + In very space-constrained devices even the full UART driver is too + large. In this case the debug UART can still be used in some cases. + This option enables the full UART in SPL, so if is it disabled, + the full UART driver will be omitted, thus saving space. + config DM_SERIAL bool "Enable Driver Model for serial drivers" depends on DM diff --git a/drivers/serial/lpc32xx_hsuart.c b/drivers/serial/lpc32xx_hsuart.c index c8926a8945..b42537529d 100644 --- a/drivers/serial/lpc32xx_hsuart.c +++ b/drivers/serial/lpc32xx_hsuart.c @@ -1,89 +1,114 @@ /* - * Copyright (C) 2011 Vladimir Zapolskiy <vz@mleia.com> + * Copyright (C) 2011-2015 Vladimir Zapolskiy <vz@mleia.com> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> -#include <asm/arch/cpu.h> -#include <asm/arch/clk.h> -#include <asm/arch/uart.h> -#include <asm/io.h> +#include <dm.h> #include <serial.h> +#include <dm/platform_data/lpc32xx_hsuart.h> + +#include <asm/arch/uart.h> #include <linux/compiler.h> DECLARE_GLOBAL_DATA_PTR; -static struct hsuart_regs *hsuart = (struct hsuart_regs *)HS_UART_BASE; +struct lpc32xx_hsuart_priv { + struct hsuart_regs *hsuart; +}; -static void lpc32xx_serial_setbrg(void) +static int lpc32xx_serial_setbrg(struct udevice *dev, int baudrate) { + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; u32 div; /* UART rate = PERIPH_CLK / ((HSU_RATE + 1) x 14) */ - div = (get_serial_clock() / 14 + gd->baudrate / 2) / gd->baudrate - 1; + div = (get_serial_clock() / 14 + baudrate / 2) / baudrate - 1; if (div > 255) div = 255; writel(div, &hsuart->rate); + + return 0; } -static int lpc32xx_serial_getc(void) +static int lpc32xx_serial_getc(struct udevice *dev) { - while (!(readl(&hsuart->level) & HSUART_LEVEL_RX)) - /* NOP */; + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; + + if (!(readl(&hsuart->level) & HSUART_LEVEL_RX)) + return -EAGAIN; return readl(&hsuart->rx) & HSUART_RX_DATA; } -static void lpc32xx_serial_putc(const char c) +static int lpc32xx_serial_putc(struct udevice *dev, const char c) { - if (c == '\n') - serial_putc('\r'); + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; + + /* Wait for empty FIFO */ + if (readl(&hsuart->level) & HSUART_LEVEL_TX) + return -EAGAIN; writel(c, &hsuart->tx); - /* Wait for character to be sent */ - while (readl(&hsuart->level) & HSUART_LEVEL_TX) - /* NOP */; + return 0; } -static int lpc32xx_serial_tstc(void) +static int lpc32xx_serial_pending(struct udevice *dev, bool input) { - if (readl(&hsuart->level) & HSUART_LEVEL_RX) - return 1; + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; + + if (input) { + if (readl(&hsuart->level) & HSUART_LEVEL_RX) + return 1; + } else { + if (readl(&hsuart->level) & HSUART_LEVEL_TX) + return 1; + } return 0; } -static int lpc32xx_serial_init(void) +static int lpc32xx_serial_init(struct hsuart_regs *hsuart) { - lpc32xx_serial_setbrg(); - /* Disable hardware RTS and CTS flow control, set up RX and TX FIFO */ writel(HSUART_CTRL_TMO_16 | HSUART_CTRL_HSU_OFFSET(20) | HSUART_CTRL_HSU_RX_TRIG_32 | HSUART_CTRL_HSU_TX_TRIG_0, &hsuart->ctrl); + return 0; } -static struct serial_device lpc32xx_serial_drv = { - .name = "lpc32xx_serial", - .start = lpc32xx_serial_init, - .stop = NULL, +static int lpc32xx_hsuart_probe(struct udevice *dev) +{ + struct lpc32xx_hsuart_platdata *platdata = dev_get_platdata(dev); + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + + priv->hsuart = (struct hsuart_regs *)platdata->base; + + lpc32xx_serial_init(priv->hsuart); + + return 0; +} + +static const struct dm_serial_ops lpc32xx_hsuart_ops = { .setbrg = lpc32xx_serial_setbrg, - .putc = lpc32xx_serial_putc, - .puts = default_serial_puts, .getc = lpc32xx_serial_getc, - .tstc = lpc32xx_serial_tstc, + .putc = lpc32xx_serial_putc, + .pending = lpc32xx_serial_pending, }; -void lpc32xx_serial_initialize(void) -{ - serial_register(&lpc32xx_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &lpc32xx_serial_drv; -} +U_BOOT_DRIVER(lpc32xx_hsuart) = { + .name = "lpc32xx_hsuart", + .id = UCLASS_SERIAL, + .probe = lpc32xx_hsuart_probe, + .ops = &lpc32xx_hsuart_ops, + .priv_auto_alloc_size = sizeof(struct lpc32xx_hsuart_priv), + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 3fab3f1efb..021b211ab4 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -368,7 +368,7 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev) /* try Processor Local Bus device first */ addr = dev_get_addr(dev); -#ifdef CONFIG_PCI +#if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) if (addr == FDT_ADDR_T_NONE) { /* then try pci device */ struct fdt_pci_addr pci_addr; @@ -389,8 +389,7 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev) return ret; } - ret = fdtdec_get_pci_bar32(gd->fdt_blob, dev->of_offset, - &pci_addr, &bar); + ret = fdtdec_get_pci_bar32(dev, &pci_addr, &bar); if (ret) return ret; @@ -440,6 +439,7 @@ static const struct udevice_id ns16550_serial_ids[] = { }; #endif +#if CONFIG_IS_ENABLED(SERIAL_PRESENT) U_BOOT_DRIVER(ns16550_serial) = { .name = "ns16550_serial", .id = UCLASS_SERIAL, @@ -453,4 +453,5 @@ U_BOOT_DRIVER(ns16550_serial) = { .ops = &ns16550_serial_ops, .flags = DM_FLAG_PRE_RELOC, }; +#endif #endif /* CONFIG_DM_SERIAL */ diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c index 4bf9a5c681..1c447ff27a 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -204,7 +204,7 @@ void serial_stdio_init(void) { } -#ifdef CONFIG_DM_STDIO +#if defined(CONFIG_DM_STDIO) && CONFIG_IS_ENABLED(SERIAL_PRESENT) static void serial_stub_putc(struct stdio_dev *sdev, const char ch) { _serial_putc(sdev->priv, ch); @@ -287,6 +287,7 @@ static int on_baudrate(const char *name, const char *value, enum env_op op, } U_BOOT_ENV_CALLBACK(baudrate, on_baudrate); +#if CONFIG_IS_ENABLED(SERIAL_PRESENT) static int serial_post_probe(struct udevice *dev) { struct dm_serial_ops *ops = serial_get_ops(dev); @@ -356,3 +357,4 @@ UCLASS_DRIVER(serial) = { .pre_remove = serial_pre_remove, .per_device_auto_alloc_size = sizeof(struct serial_dev_priv), }; +#endif |