From 2fccd2d96badcdf6165658a99771a4c475586279 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Wed, 3 Sep 2014 17:37:03 -0600 Subject: tegra: Convert tegra GPIO driver to use driver model This is an implementation of GPIOs for Tegra that uses driver model. It has been tested on trimslice and also using the new iotrace feature. The implementation uses a top-level GPIO device (which has no actual GPIOS). Under this all the banks are created as separate GPIO devices. The GPIOs are named as per the Tegra datasheet/header files: A0..A7, B0..B7, ..., Z0..Z7, AA0..AA7, etc. Since driver model is not yet available before relocation, or in SPL, a special function is provided for seaboard's SPL code. Signed-off-by: Simon Glass --- drivers/gpio/tegra_gpio.c | 327 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 272 insertions(+), 55 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/tegra_gpio.c b/drivers/gpio/tegra_gpio.c index fea9d17..1cc4abb 100644 --- a/drivers/gpio/tegra_gpio.c +++ b/drivers/gpio/tegra_gpio.c @@ -12,10 +12,17 @@ */ #include +#include +#include +#include +#include #include #include #include #include +#include + +DECLARE_GLOBAL_DATA_PTR; enum { TEGRA_CMD_INFO, @@ -24,14 +31,18 @@ enum { TEGRA_CMD_INPUT, }; -static struct gpio_names { - char name[GPIO_NAME_SIZE]; -} gpio_names[MAX_NUM_GPIOS]; +struct tegra_gpio_platdata { + struct gpio_ctlr_bank *bank; + const char *port_name; /* Name of port, e.g. "B" */ + int base_gpio; /* Port number for this port (0, 1,.., n-1) */ +}; -static char *get_name(int i) -{ - return *gpio_names[i].name ? gpio_names[i].name : "UNKNOWN"; -} +/* Information about each port at run-time */ +struct tegra_port_info { + char label[TEGRA_GPIOS_PER_PORT][GPIO_NAME_SIZE]; + struct gpio_ctlr_bank *bank; + int base_gpio; /* Port number for this port (0, 1,.., n-1) */ +}; /* Return config of pin 'gpio' as GPIO (1) or SFPIO (0) */ static int get_config(unsigned gpio) @@ -121,38 +132,72 @@ static void set_level(unsigned gpio, int high) writel(u, &bank->gpio_out[GPIO_PORT(gpio)]); } +static int check_reserved(struct udevice *dev, unsigned offset, + const char *func) +{ + struct tegra_port_info *state = dev_get_priv(dev); + struct gpio_dev_priv *uc_priv = dev->uclass_priv; + + if (!*state->label[offset]) { + printf("tegra_gpio: %s: error: gpio %s%d not reserved\n", + func, uc_priv->bank_name, offset); + return -EBUSY; + } + + return 0; +} + +/* set GPIO pin 'gpio' as an output, with polarity 'value' */ +int tegra_spl_gpio_direction_output(int gpio, int value) +{ + /* Configure as a GPIO */ + set_config(gpio, 1); + + /* Configure GPIO output value. */ + set_level(gpio, value); + + /* Configure GPIO direction as output. */ + set_direction(gpio, 1); + + return 0; +} + /* * Generic_GPIO primitives. */ -int gpio_request(unsigned gpio, const char *label) +static int tegra_gpio_request(struct udevice *dev, unsigned offset, + const char *label) { - if (gpio >= MAX_NUM_GPIOS) - return -1; + struct tegra_port_info *state = dev_get_priv(dev); - if (label != NULL) { - strncpy(gpio_names[gpio].name, label, GPIO_NAME_SIZE); - gpio_names[gpio].name[GPIO_NAME_SIZE - 1] = '\0'; - } + if (*state->label[offset]) + return -EBUSY; + + strncpy(state->label[offset], label, GPIO_NAME_SIZE); + state->label[offset][GPIO_NAME_SIZE - 1] = '\0'; /* Configure as a GPIO */ - set_config(gpio, 1); + set_config(state->base_gpio + offset, 1); return 0; } -int gpio_free(unsigned gpio) +static int tegra_gpio_free(struct udevice *dev, unsigned offset) { - if (gpio >= MAX_NUM_GPIOS) - return -1; + struct tegra_port_info *state = dev_get_priv(dev); + int ret; + + ret = check_reserved(dev, offset, __func__); + if (ret) + return ret; + state->label[offset][0] = '\0'; - gpio_names[gpio].name[0] = '\0'; - /* Do not configure as input or change pin mux here */ return 0; } /* read GPIO OUT value of pin 'gpio' */ -static int gpio_get_output_value(unsigned gpio) +static int tegra_gpio_get_output_value(unsigned gpio) { struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE; struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)]; @@ -166,24 +211,34 @@ static int gpio_get_output_value(unsigned gpio) return (val >> GPIO_BIT(gpio)) & 1; } + /* set GPIO pin 'gpio' as an input */ -int gpio_direction_input(unsigned gpio) +static int tegra_gpio_direction_input(struct udevice *dev, unsigned offset) { - debug("gpio_direction_input: pin = %d (port %d:bit %d)\n", - gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio)); + struct tegra_port_info *state = dev_get_priv(dev); + int ret; + + ret = check_reserved(dev, offset, __func__); + if (ret) + return ret; /* Configure GPIO direction as input. */ - set_direction(gpio, 0); + set_direction(state->base_gpio + offset, 0); return 0; } /* set GPIO pin 'gpio' as an output, with polarity 'value' */ -int gpio_direction_output(unsigned gpio, int value) +static int tegra_gpio_direction_output(struct udevice *dev, unsigned offset, + int value) { - debug("gpio_direction_output: pin = %d (port %d:bit %d) = %s\n", - gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio), - value ? "HIGH" : "LOW"); + struct tegra_port_info *state = dev_get_priv(dev); + int gpio = state->base_gpio + offset; + int ret; + + ret = check_reserved(dev, offset, __func__); + if (ret) + return ret; /* Configure GPIO output value. */ set_level(gpio, value); @@ -195,25 +250,38 @@ int gpio_direction_output(unsigned gpio, int value) } /* read GPIO IN value of pin 'gpio' */ -int gpio_get_value(unsigned gpio) +static int tegra_gpio_get_value(struct udevice *dev, unsigned offset) { - struct gpio_ctlr *ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE; - struct gpio_ctlr_bank *bank = &ctlr->gpio_bank[GPIO_BANK(gpio)]; + struct tegra_port_info *state = dev_get_priv(dev); + int gpio = state->base_gpio + offset; + int ret; int val; - debug("gpio_get_value: pin = %d (port %d:bit %d)\n", - gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio)); + ret = check_reserved(dev, offset, __func__); + if (ret) + return ret; + + debug("%s: pin = %d (port %d:bit %d)\n", __func__, + gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio)); - val = readl(&bank->gpio_in[GPIO_PORT(gpio)]); + val = readl(&state->bank->gpio_in[GPIO_PORT(gpio)]); return (val >> GPIO_BIT(gpio)) & 1; } /* write GPIO OUT value to pin 'gpio' */ -int gpio_set_value(unsigned gpio, int value) +static int tegra_gpio_set_value(struct udevice *dev, unsigned offset, int value) { + struct tegra_port_info *state = dev_get_priv(dev); + int gpio = state->base_gpio + offset; + int ret; + + ret = check_reserved(dev, offset, __func__); + if (ret) + return ret; + debug("gpio_set_value: pin = %d (port %d:bit %d), value = %d\n", - gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio), value); + gpio, GPIO_FULLPORT(gpio), GPIO_BIT(gpio), value); /* Configure GPIO output value. */ set_level(gpio, value); @@ -241,26 +309,175 @@ void gpio_config_table(const struct tegra_gpio_config *config, int len) } } -/* - * Display Tegra GPIO information +static int tegra_gpio_get_function(struct udevice *dev, unsigned offset) +{ + struct tegra_port_info *state = dev_get_priv(dev); + int gpio = state->base_gpio + offset; + + if (!*state->label[offset]) + return GPIOF_UNUSED; + if (!get_config(gpio)) + return GPIOF_FUNC; + else if (get_direction(gpio)) + return GPIOF_OUTPUT; + else + return GPIOF_INPUT; +} + +static int tegra_gpio_get_state(struct udevice *dev, unsigned int offset, + char *buf, int bufsize) +{ + struct gpio_dev_priv *uc_priv = dev->uclass_priv; + struct tegra_port_info *state = dev_get_priv(dev); + int gpio = state->base_gpio + offset; + const char *label; + int is_output; + int is_gpio; + int size; + + label = state->label[offset]; + is_gpio = get_config(gpio); /* GPIO, not SFPIO */ + size = snprintf(buf, bufsize, "%s%d: ", + uc_priv->bank_name ? uc_priv->bank_name : "", offset); + buf += size; + bufsize -= size; + if (is_gpio) { + is_output = get_direction(gpio); + + snprintf(buf, bufsize, "%s: %d [%c]%s%s", + is_output ? "out" : " in", + is_output ? + tegra_gpio_get_output_value(gpio) : + tegra_gpio_get_value(dev, offset), + *label ? 'x' : ' ', + *label ? " " : "", + label); + } else { + snprintf(buf, bufsize, "sfpio"); + } + + return 0; +} + +static const struct dm_gpio_ops gpio_tegra_ops = { + .request = tegra_gpio_request, + .free = tegra_gpio_free, + .direction_input = tegra_gpio_direction_input, + .direction_output = tegra_gpio_direction_output, + .get_value = tegra_gpio_get_value, + .set_value = tegra_gpio_set_value, + .get_function = tegra_gpio_get_function, + .get_state = tegra_gpio_get_state, +}; + +/** + * Returns the name of a GPIO port + * + * GPIOs are named A, B, C, ..., Z, AA, BB, CC, ... + * + * @base_port: Base port number (0, 1..n-1) + * @return allocated string containing the name */ -void gpio_info(void) +static char *gpio_port_name(int base_port) { - unsigned c; - int type; + char *name, *s; + + name = malloc(3); + if (name) { + s = name; + *s++ = 'A' + (base_port % 26); + if (base_port >= 26) + *s++ = *name; + *s = '\0'; + } - for (c = 0; c < MAX_NUM_GPIOS; c++) { - type = get_config(c); /* GPIO, not SFPIO */ - if (type) { - printf("GPIO_%d:\t%s is an %s, ", c, - get_name(c), - get_direction(c) ? "OUTPUT" : "INPUT"); - if (get_direction(c)) - printf("value = %d", gpio_get_output_value(c)); - else - printf("value = %d", gpio_get_value(c)); - printf("\n"); - } else - continue; + return name; +} + +static const struct udevice_id tegra_gpio_ids[] = { + { .compatible = "nvidia,tegra30-gpio" }, + { .compatible = "nvidia,tegra20-gpio" }, + { } +}; + +static int gpio_tegra_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev->uclass_priv; + struct tegra_port_info *priv = dev->priv; + struct tegra_gpio_platdata *plat = dev->platdata; + + /* Only child devices have ports */ + if (!plat) + return 0; + + priv->bank = plat->bank; + priv->base_gpio = plat->base_gpio; + + uc_priv->gpio_count = TEGRA_GPIOS_PER_PORT; + uc_priv->bank_name = plat->port_name; + + return 0; +} + +/** + * We have a top-level GPIO device with no actual GPIOs. It has a child + * device for each Tegra port. + */ +static int gpio_tegra_bind(struct udevice *parent) +{ + struct tegra_gpio_platdata *plat = parent->platdata; + struct gpio_ctlr *ctlr; + int bank_count; + int bank; + int ret; + int len; + + /* If this is a child device, there is nothing to do here */ + if (plat) + return 0; + + /* + * This driver does not make use of interrupts, other than to figure + * out the number of GPIO banks + */ + if (!fdt_getprop(gd->fdt_blob, parent->of_offset, "interrupts", &len)) + return -EINVAL; + bank_count = len / 3 / sizeof(u32); + ctlr = (struct gpio_ctlr *)fdtdec_get_addr(gd->fdt_blob, + parent->of_offset, "reg"); + for (bank = 0; bank < bank_count; bank++) { + int port; + + for (port = 0; port < TEGRA_PORTS_PER_BANK; port++) { + struct tegra_gpio_platdata *plat; + struct udevice *dev; + int base_port; + + plat = calloc(1, sizeof(*plat)); + if (!plat) + return -ENOMEM; + plat->bank = &ctlr->gpio_bank[bank]; + base_port = bank * TEGRA_PORTS_PER_BANK + port; + plat->base_gpio = TEGRA_GPIOS_PER_PORT * base_port; + plat->port_name = gpio_port_name(base_port); + + ret = device_bind(parent, parent->driver, + plat->port_name, plat, -1, &dev); + if (ret) + return ret; + dev->of_offset = parent->of_offset; + } } + + return 0; } + +U_BOOT_DRIVER(gpio_tegra) = { + .name = "gpio_tegra", + .id = UCLASS_GPIO, + .of_match = tegra_gpio_ids, + .bind = gpio_tegra_bind, + .probe = gpio_tegra_probe, + .priv_auto_alloc_size = sizeof(struct tegra_port_info), + .ops = &gpio_tegra_ops, +}; -- cgit v1.1 From addf9513d0b1a57062a8604330e8c0e822d9d214 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:23 -0600 Subject: serial: Set up the 'priv' pointer when creating a serial device The stdio_dev structure has a private pointer for its creator, but it is not set up by the serial system. Set it to point to the serial device so that it can be found by code called by stdio. Signed-off-by: Simon Glass --- drivers/serial/serial.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers') diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c index d2eb752..bbe60af 100644 --- a/drivers/serial/serial.c +++ b/drivers/serial/serial.c @@ -320,6 +320,7 @@ void serial_stdio_init(void) dev.puts = serial_stub_puts; dev.getc = serial_stub_getc; dev.tstc = serial_stub_tstc; + dev.priv = s; stdio_register(&dev); -- cgit v1.1 From 1f359e3611c55d9cfae88dafce04db1833033bd0 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:25 -0600 Subject: dm: Adjust lists_bind_fdt() to return the bound device Allow the caller to find out the device that was bound in response to this call. Signed-off-by: Simon Glass --- drivers/core/lists.c | 10 +++++++--- drivers/core/root.c | 2 +- 2 files changed, 8 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/core/lists.c b/drivers/core/lists.c index 0f08bfd..699f94b 100644 --- a/drivers/core/lists.c +++ b/drivers/core/lists.c @@ -118,7 +118,8 @@ static int driver_check_compatible(const void *blob, int offset, return -ENOENT; } -int lists_bind_fdt(struct udevice *parent, const void *blob, int offset) +int lists_bind_fdt(struct udevice *parent, const void *blob, int offset, + struct udevice **devp) { struct driver *driver = ll_entry_start(struct driver, driver); const int n_ents = ll_entry_count(struct driver, driver); @@ -130,6 +131,8 @@ int lists_bind_fdt(struct udevice *parent, const void *blob, int offset) int ret = 0; dm_dbg("bind node %s\n", fdt_get_name(blob, offset, NULL)); + if (devp) + *devp = NULL; for (entry = driver; entry != driver + n_ents; entry++) { ret = driver_check_compatible(blob, offset, entry->of_match); name = fdt_get_name(blob, offset, NULL); @@ -149,10 +152,11 @@ int lists_bind_fdt(struct udevice *parent, const void *blob, int offset) ret = device_bind(parent, entry, name, NULL, offset, &dev); if (ret) { dm_warn("Error binding driver '%s'\n", entry->name); - if (!result || ret != -ENOENT) - result = ret; + return ret; } else { found = true; + if (devp) + *devp = dev; } break; } diff --git a/drivers/core/root.c b/drivers/core/root.c index 393dd98..a328a48 100644 --- a/drivers/core/root.c +++ b/drivers/core/root.c @@ -91,7 +91,7 @@ int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset, if (pre_reloc_only && !fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL)) continue; - err = lists_bind_fdt(parent, blob, offset); + err = lists_bind_fdt(parent, blob, offset, NULL); if (err && !ret) ret = err; } -- cgit v1.1 From 57d92753d4cada5c314a7d6bcfe7ad79b00c2eb8 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:26 -0600 Subject: dm: Add a uclass for serial devices Serial devices support simple byte input/output and a few operations to find out whether data is available. Add a basic uclass for serial devices to be used by drivers that are converted to driver model. Signed-off-by: Simon Glass --- drivers/serial/Makefile | 4 + drivers/serial/serial-uclass.c | 213 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 217 insertions(+) create mode 100644 drivers/serial/serial-uclass.c (limited to 'drivers') diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 571c18f..4720e1d 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -5,7 +5,11 @@ # SPDX-License-Identifier: GPL-2.0+ # +ifdef CONFIG_DM_SERIAL +obj-y += serial-uclass.o +else obj-y += serial.o +endif obj-$(CONFIG_ALTERA_UART) += altera_uart.o obj-$(CONFIG_ALTERA_JTAG_UART) += altera_jtag_uart.o diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c new file mode 100644 index 0000000..d04104e --- /dev/null +++ b/drivers/serial/serial-uclass.c @@ -0,0 +1,213 @@ +/* + * Copyright (c) 2014 The Chromium OS Authors. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +/* The currently-selected console serial device */ +struct udevice *cur_dev __attribute__ ((section(".data"))); + +#ifndef CONFIG_SYS_MALLOC_F_LEN +#error "Serial is required before relocation - define CONFIG_SYS_MALLOC_F_LEN to make this work" +#endif + +static void serial_find_console_or_panic(void) +{ + int node; + + /* Check for a chosen console */ + node = fdtdec_get_chosen_node(gd->fdt_blob, "stdout-path"); + if (node < 0) + node = fdtdec_get_alias_node(gd->fdt_blob, "console"); + if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node, &cur_dev)) + return; + + /* + * If the console is not marked to be bound before relocation, bind + * it anyway. + */ + if (node > 0 && + !lists_bind_fdt(gd->dm_root, gd->fdt_blob, node, &cur_dev)) { + if (!device_probe(cur_dev)) + return; + cur_dev = NULL; + } + + /* + * Failing that, get the device with sequence number 0, or in extremis + * just the first serial device we can find. But we insist on having + * a console (even if it is silent). + */ + if (uclass_get_device_by_seq(UCLASS_SERIAL, 0, &cur_dev) && + (uclass_first_device(UCLASS_SERIAL, &cur_dev) || !cur_dev)) + panic("No serial driver found"); +} + +/* Called prior to relocation */ +int serial_init(void) +{ + serial_find_console_or_panic(); + gd->flags |= GD_FLG_SERIAL_READY; + + return 0; +} + +/* Called after relocation */ +void serial_initialize(void) +{ + serial_find_console_or_panic(); +} + +void serial_putc(char ch) +{ + struct dm_serial_ops *ops = serial_get_ops(cur_dev); + int err; + + do { + err = ops->putc(cur_dev, ch); + } while (err == -EAGAIN); + if (ch == '\n') + serial_putc('\r'); +} + +void serial_setbrg(void) +{ + struct dm_serial_ops *ops = serial_get_ops(cur_dev); + + if (ops->setbrg) + ops->setbrg(cur_dev, gd->baudrate); +} + +void serial_puts(const char *str) +{ + while (*str) + serial_putc(*str++); +} + +int serial_tstc(void) +{ + struct dm_serial_ops *ops = serial_get_ops(cur_dev); + + if (ops->pending) + return ops->pending(cur_dev, true); + + return 1; +} + +int serial_getc(void) +{ + struct dm_serial_ops *ops = serial_get_ops(cur_dev); + int err; + + do { + err = ops->getc(cur_dev); + } while (err == -EAGAIN); + + return err >= 0 ? err : 0; +} + +void serial_stdio_init(void) +{ +} + +void serial_stub_putc(struct stdio_dev *sdev, const char ch) +{ + struct udevice *dev = sdev->priv; + struct dm_serial_ops *ops = serial_get_ops(dev); + + ops->putc(dev, ch); +} + +void serial_stub_puts(struct stdio_dev *sdev, const char *str) +{ + while (*str) + serial_stub_putc(sdev, *str++); +} + +int serial_stub_getc(struct stdio_dev *sdev) +{ + struct udevice *dev = sdev->priv; + struct dm_serial_ops *ops = serial_get_ops(dev); + + int err; + + do { + err = ops->getc(dev); + } while (err == -EAGAIN); + + return err >= 0 ? err : 0; +} + +int serial_stub_tstc(struct stdio_dev *sdev) +{ + struct udevice *dev = sdev->priv; + struct dm_serial_ops *ops = serial_get_ops(dev); + + if (ops->pending) + return ops->pending(dev, true); + + return 1; +} + +static int serial_post_probe(struct udevice *dev) +{ + struct stdio_dev sdev; + struct dm_serial_ops *ops = serial_get_ops(dev); + struct serial_dev_priv *upriv = dev->uclass_priv; + int ret; + + /* Set the baud rate */ + if (ops->setbrg) { + ret = ops->setbrg(dev, gd->baudrate); + if (ret) + return ret; + } + + if (!(gd->flags & GD_FLG_RELOC)) + return 0; + + memset(&sdev, '\0', sizeof(sdev)); + + strncpy(sdev.name, dev->name, sizeof(sdev.name)); + sdev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; + sdev.priv = dev; + sdev.putc = serial_stub_putc; + sdev.puts = serial_stub_puts; + sdev.getc = serial_stub_getc; + sdev.tstc = serial_stub_tstc; + stdio_register_dev(&sdev, &upriv->sdev); + + return 0; +} + +static int serial_pre_remove(struct udevice *dev) +{ +#ifdef CONFIG_SYS_STDIO_DEREGISTER + struct serial_dev_priv *upriv = dev->uclass_priv; + + if (stdio_deregister_dev(upriv->sdev)) + return -EPERM; +#endif + + return 0; +} + +UCLASS_DRIVER(serial) = { + .id = UCLASS_SERIAL, + .name = "serial", + .post_probe = serial_post_probe, + .pre_remove = serial_pre_remove, + .per_device_auto_alloc_size = sizeof(struct serial_dev_priv), +}; -- cgit v1.1 From 890fcefe2e20b30a3d98f667c2dcfb382b1de2e6 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:27 -0600 Subject: sandbox: Convert serial driver to use driver model Adjust the sandbox serial driver to use the new driver model uclass. The driver works much as before, but within the new framework. Signed-off-by: Simon Glass --- drivers/serial/sandbox.c | 67 ++++++++++++++++++++++++++---------------------- 1 file changed, 36 insertions(+), 31 deletions(-) (limited to 'drivers') diff --git a/drivers/serial/sandbox.c b/drivers/serial/sandbox.c index 51fd871..ac54e01 100644 --- a/drivers/serial/sandbox.c +++ b/drivers/serial/sandbox.c @@ -11,12 +11,16 @@ */ #include +#include +#include #include #include #include #include #include +DECLARE_GLOBAL_DATA_PTR; + /* * * serial_buf: A buffer that holds keyboard characters for the @@ -30,27 +34,21 @@ static char serial_buf[16]; static unsigned int serial_buf_write; static unsigned int serial_buf_read; -static int sandbox_serial_init(void) +static int sandbox_serial_probe(struct udevice *dev) { struct sandbox_state *state = state_get_current(); if (state->term_raw != STATE_TERM_COOKED) os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS); - return 0; -} -static void sandbox_serial_setbrg(void) -{ + return 0; } -static void sandbox_serial_putc(const char ch) +static int sandbox_serial_putc(struct udevice *dev, const char ch) { os_write(1, &ch, 1); -} -static void sandbox_serial_puts(const char *str) -{ - os_write(1, str, strlen(str)); + return 0; } static unsigned int increment_buffer_index(unsigned int index) @@ -58,12 +56,15 @@ static unsigned int increment_buffer_index(unsigned int index) return (index + 1) % ARRAY_SIZE(serial_buf); } -static int sandbox_serial_tstc(void) +static int sandbox_serial_pending(struct udevice *dev, bool input) { const unsigned int next_index = increment_buffer_index(serial_buf_write); ssize_t count; + if (!input) + return 0; + os_usleep(100); #ifdef CONFIG_LCD lcd_sync(); @@ -74,38 +75,42 @@ static int sandbox_serial_tstc(void) count = os_read_no_block(0, &serial_buf[serial_buf_write], 1); if (count == 1) serial_buf_write = next_index; + return serial_buf_write != serial_buf_read; } -static int sandbox_serial_getc(void) +static int sandbox_serial_getc(struct udevice *dev) { int result; - while (!sandbox_serial_tstc()) - ; /* buffer empty */ + if (!sandbox_serial_pending(dev, true)) + return -EAGAIN; /* buffer empty */ result = serial_buf[serial_buf_read]; serial_buf_read = increment_buffer_index(serial_buf_read); return result; } -static struct serial_device sandbox_serial_drv = { - .name = "sandbox_serial", - .start = sandbox_serial_init, - .stop = NULL, - .setbrg = sandbox_serial_setbrg, - .putc = sandbox_serial_putc, - .puts = sandbox_serial_puts, - .getc = sandbox_serial_getc, - .tstc = sandbox_serial_tstc, +static const struct dm_serial_ops sandbox_serial_ops = { + .putc = sandbox_serial_putc, + .pending = sandbox_serial_pending, + .getc = sandbox_serial_getc, }; -void sandbox_serial_initialize(void) -{ - serial_register(&sandbox_serial_drv); -} +static const struct udevice_id sandbox_serial_ids[] = { + { .compatible = "sandbox,serial" }, + { } +}; -__weak struct serial_device *default_serial_console(void) -{ - return &sandbox_serial_drv; -} +U_BOOT_DRIVER(serial_sandbox) = { + .name = "serial_sandbox", + .id = UCLASS_SERIAL, + .of_match = sandbox_serial_ids, + .probe = sandbox_serial_probe, + .ops = &sandbox_serial_ops, + .flags = DM_FLAG_PRE_RELOC, +}; + +U_BOOT_DEVICE(serial_sandbox_non_fdt) = { + .name = "serial_sandbox", +}; -- cgit v1.1 From 72e98228c3f17a5411b4f8fea27cfd6072ace348 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:28 -0600 Subject: sandbox: serial: Support a coloured console The current sandbox serial driver is a pretty trivial example and does not have the featues that might be needed for other board serial drivers. To help provide a better example, add a text colour property to the device tree for sandbox. This uses platform data, a device tree node, driver private data and a remove() method. Signed-off-by: Simon Glass --- drivers/serial/sandbox.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) (limited to 'drivers') diff --git a/drivers/serial/sandbox.c b/drivers/serial/sandbox.c index ac54e01..cd2f91e 100644 --- a/drivers/serial/sandbox.c +++ b/drivers/serial/sandbox.c @@ -34,19 +34,67 @@ static char serial_buf[16]; static unsigned int serial_buf_write; static unsigned int serial_buf_read; +struct sandbox_serial_platdata { + int colour; /* Text colour to use for output, -1 for none */ +}; + +struct sandbox_serial_priv { + bool start_of_line; +}; + +/** + * output_ansi_colour() - Output an ANSI colour code + * + * @colour: Colour to output (0-7) + */ +static void output_ansi_colour(int colour) +{ + char ansi_code[] = "\x1b[1;3Xm"; + + ansi_code[5] = '0' + colour; + os_write(1, ansi_code, sizeof(ansi_code) - 1); +} + +static void output_ansi_reset(void) +{ + os_write(1, "\x1b[0m", 4); +} + static int sandbox_serial_probe(struct udevice *dev) { struct sandbox_state *state = state_get_current(); + struct sandbox_serial_priv *priv = dev_get_priv(dev); if (state->term_raw != STATE_TERM_COOKED) os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS); + priv->start_of_line = 0; + + return 0; +} + +static int sandbox_serial_remove(struct udevice *dev) +{ + struct sandbox_serial_platdata *plat = dev->platdata; + + if (plat->colour != -1) + output_ansi_reset(); return 0; } static int sandbox_serial_putc(struct udevice *dev, const char ch) { + struct sandbox_serial_priv *priv = dev_get_priv(dev); + struct sandbox_serial_platdata *plat = dev->platdata; + + if (priv->start_of_line && plat->colour != -1) { + priv->start_of_line = false; + output_ansi_colour(plat->colour); + } + os_write(1, &ch, 1); + if (ch == '\n') + priv->start_of_line = true; return 0; } @@ -91,6 +139,32 @@ static int sandbox_serial_getc(struct udevice *dev) return result; } +static const char * const ansi_colour[] = { + "black", "red", "green", "yellow", "blue", "megenta", "cyan", + "white", +}; + +static int sandbox_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct sandbox_serial_platdata *plat = dev->platdata; + const char *colour; + int i; + + plat->colour = -1; + colour = fdt_getprop(gd->fdt_blob, dev->of_offset, + "sandbox,text-colour", NULL); + if (colour) { + for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) { + if (!strcmp(colour, ansi_colour[i])) { + plat->colour = i; + break; + } + } + } + + return 0; +} + static const struct dm_serial_ops sandbox_serial_ops = { .putc = sandbox_serial_putc, .pending = sandbox_serial_pending, @@ -106,11 +180,20 @@ U_BOOT_DRIVER(serial_sandbox) = { .name = "serial_sandbox", .id = UCLASS_SERIAL, .of_match = sandbox_serial_ids, + .ofdata_to_platdata = sandbox_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct sandbox_serial_platdata), + .priv_auto_alloc_size = sizeof(struct sandbox_serial_priv), .probe = sandbox_serial_probe, + .remove = sandbox_serial_remove, .ops = &sandbox_serial_ops, .flags = DM_FLAG_PRE_RELOC, }; +static const struct sandbox_serial_platdata platdata_non_fdt = { + .colour = -1, +}; + U_BOOT_DEVICE(serial_sandbox_non_fdt) = { .name = "serial_sandbox", + .platdata = &platdata_non_fdt, }; -- cgit v1.1 From fa54eb12431efa845bc5692347ee3a7f39d897bc Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:32 -0600 Subject: dm: serial: Move baud rate calculation to ns16550.c Move the function that calculates the baud rate divisor into ns16550.c so it can be used by that file. Signed-off-by: Simon Glass --- drivers/serial/ns16550.c | 18 +++++++++++++++++- drivers/serial/serial_ns16550.c | 14 ++++---------- 2 files changed, 21 insertions(+), 11 deletions(-) (limited to 'drivers') diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 079f67d..3f5f4ef 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -4,7 +4,7 @@ * modified to use CONFIG_SYS_ISA_MEM and new defines */ -#include +#include #include #include #include @@ -45,6 +45,22 @@ #define CONFIG_SYS_NS16550_IER 0x00 #endif /* CONFIG_SYS_NS16550_IER */ +int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) +{ + const unsigned int mode_x_div = 16; + +#ifdef CONFIG_OMAP1510 + /* If can't cleanly clock 115200 set div to 1 */ + if ((clock == 12000000) && (baudrate == 115200)) { + port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ + return 1; /* return 1 for base divisor */ + } + port->osc_12m_sel = 0; /* clear if previsouly set */ +#endif + + return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate); +} + void NS16550_init(NS16550_t com_port, int baud_divisor) { #if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX)) diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c index dafeed7..632da4c 100644 --- a/drivers/serial/serial_ns16550.c +++ b/drivers/serial/serial_ns16550.c @@ -81,7 +81,8 @@ static NS16550_t serial_ports[6] = { static int eserial##port##_init(void) \ { \ int clock_divisor; \ - clock_divisor = calc_divisor(serial_ports[port-1]); \ + clock_divisor = ns16550_calc_divisor(serial_ports[port-1], \ + CONFIG_SYS_NS16550_CLK, gd->baudrate); \ NS16550_init(serial_ports[port-1], clock_divisor); \ return 0 ; \ } \ @@ -118,14 +119,6 @@ static NS16550_t serial_ports[6] = { .puts = eserial##port##_puts, \ } -static int calc_divisor (NS16550_t port) -{ - const unsigned int mode_x_div = 16; - - return DIV_ROUND_CLOSEST(CONFIG_SYS_NS16550_CLK, - mode_x_div * gd->baudrate); -} - void _serial_putc(const char c,const int port) { @@ -167,7 +160,8 @@ _serial_setbrg (const int port) { int clock_divisor; - clock_divisor = calc_divisor(PORT); + clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK, + gd->baudrate); NS16550_reinit(PORT, clock_divisor); } -- cgit v1.1 From 8bbe33c829c83b7a6315bbc16875f79ba4adac47 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:33 -0600 Subject: dm: serial: Collect common baud rate code in ns16550 The same sequence is used in several places, so move it into a function. Note that UART_LCR_BKSE is an alias for UART_LCR_DLAB. Signed-off-by: Simon Glass --- drivers/serial/ns16550.c | 33 +++++++++++++-------------------- 1 file changed, 13 insertions(+), 20 deletions(-) (limited to 'drivers') diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 3f5f4ef..d54eba6 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -61,6 +61,14 @@ int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate); } +static void NS16550_setbrg(NS16550_t com_port, int baud_divisor) +{ + serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr); + serial_out(baud_divisor & 0xff, &com_port->dll); + serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm); + serial_out(UART_LCRVAL, &com_port->lcr); +} + void NS16550_init(NS16550_t com_port, int baud_divisor) { #if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX)) @@ -71,10 +79,7 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) */ if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE)) == UART_LSR_THRE) { - serial_out(UART_LCR_DLAB, &com_port->lcr); - serial_out(baud_divisor & 0xff, &com_port->dll); - serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm); - serial_out(UART_LCRVAL, &com_port->lcr); + NS16550_setbrg(com_port, baud_divisor); serial_out(0, &com_port->mdr1); } #endif @@ -87,16 +92,10 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX) serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/ #endif - serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr); - serial_out(0, &com_port->dll); - serial_out(0, &com_port->dlm); - serial_out(UART_LCRVAL, &com_port->lcr); + NS16550_setbrg(com_port, 0); serial_out(UART_MCRVAL, &com_port->mcr); serial_out(UART_FCRVAL, &com_port->fcr); - serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr); - serial_out(baud_divisor & 0xff, &com_port->dll); - serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm); - serial_out(UART_LCRVAL, &com_port->lcr); + NS16550_setbrg(com_port, baud_divisor); #if defined(CONFIG_OMAP) || \ defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \ defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX) @@ -113,16 +112,10 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) void NS16550_reinit(NS16550_t com_port, int baud_divisor) { serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier); - serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr); - serial_out(0, &com_port->dll); - serial_out(0, &com_port->dlm); - serial_out(UART_LCRVAL, &com_port->lcr); + NS16550_setbrg(com_port, 0); serial_out(UART_MCRVAL, &com_port->mcr); serial_out(UART_FCRVAL, &com_port->fcr); - serial_out(UART_LCR_BKSE, &com_port->lcr); - serial_out(baud_divisor & 0xff, &com_port->dll); - serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm); - serial_out(UART_LCRVAL, &com_port->lcr); + NS16550_setbrg(com_port, baud_divisor); } #endif /* CONFIG_NS16550_MIN_FUNCTIONS */ -- cgit v1.1 From 12e431b2777ce3b6940d7b7f1e32e28f58277560 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:34 -0600 Subject: dm: serial: Add driver model support for ns16550 Add driver model support so that ns16550 can support operation both with and without driver model. The driver needs a clock frequency so cannot stand alone unfortunately. The clock frequency must be provided by a separate driver. Signed-off-by: Simon Glass --- drivers/serial/Makefile | 2 +- drivers/serial/ns16550.c | 156 ++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 155 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 4720e1d..5ae6416 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -9,6 +9,7 @@ ifdef CONFIG_DM_SERIAL obj-y += serial-uclass.o else obj-y += serial.o +obj-$(CONFIG_SYS_NS16550_SERIAL) += serial_ns16550.o endif obj-$(CONFIG_ALTERA_UART) += altera_uart.o @@ -20,7 +21,6 @@ obj-$(CONFIG_MCFUART) += mcfuart.o obj-$(CONFIG_OPENCORES_YANU) += opencores_yanu.o obj-$(CONFIG_SYS_NS16550) += ns16550.o obj-$(CONFIG_S5P) += serial_s5p.o -obj-$(CONFIG_SYS_NS16550_SERIAL) += serial_ns16550.o obj-$(CONFIG_IMX_SERIAL) += serial_imx.o obj-$(CONFIG_KS8695_SERIAL) += serial_ks8695.o obj-$(CONFIG_MAX3100_SERIAL) += serial_max3100.o diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index d54eba6..63a9ef6 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -5,17 +5,25 @@ */ #include +#include +#include +#include #include +#include #include #include #include +DECLARE_GLOBAL_DATA_PTR; + #define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */ #define UART_MCRVAL (UART_MCR_DTR | \ UART_MCR_RTS) /* RTS/DTR */ #define UART_FCRVAL (UART_FCR_FIFO_EN | \ UART_FCR_RXSR | \ UART_FCR_TXSR) /* Clear & enable FIFOs */ + +#ifndef CONFIG_DM_SERIAL #ifdef CONFIG_SYS_NS16550_PORT_MAPPED #define serial_out(x, y) outb(x, (ulong)y) #define serial_in(y) inb((ulong)y) @@ -29,6 +37,7 @@ #define serial_out(x, y) writeb(x, y) #define serial_in(y) readb(y) #endif +#endif /* !CONFIG_DM_SERIAL */ #if defined(CONFIG_SOC_KEYSTONE) #define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE 0 @@ -45,6 +54,58 @@ #define CONFIG_SYS_NS16550_IER 0x00 #endif /* CONFIG_SYS_NS16550_IER */ +#ifdef CONFIG_DM_SERIAL +static void ns16550_writeb(NS16550_t port, int offset, int value) +{ + struct ns16550_platdata *plat = port->plat; + unsigned char *addr; + + offset *= 1 << plat->reg_shift; + addr = plat->base + offset; + /* + * As far as we know it doesn't make sense to support selection of + * these options at run-time, so use the existing CONFIG options. + */ +#ifdef CONFIG_SYS_NS16550_PORT_MAPPED + outb(value, addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN) + out_le32(addr, value); +#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN) + out_be32(addr, value); +#elif defined(CONFIG_SYS_BIG_ENDIAN) + writeb(value, addr + (1 << plat->reg_shift) - 1); +#else + writeb(value, addr); +#endif +} + +static int ns16550_readb(NS16550_t port, int offset) +{ + struct ns16550_platdata *plat = port->plat; + unsigned char *addr; + + offset *= 1 << plat->reg_shift; + addr = plat->base + offset; +#ifdef CONFIG_SYS_NS16550_PORT_MAPPED + return inb(addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN) + return in_le32(addr); +#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN) + return in_be32(addr); +#elif defined(CONFIG_SYS_BIG_ENDIAN) + return readb(addr + (1 << plat->reg_shift) - 1); +#else + return readb(addr); +#endif +} + +/* We can clean these up once everything is moved to driver model */ +#define serial_out(value, addr) \ + ns16550_writeb(com_port, addr - (unsigned char *)com_port, value) +#define serial_in(addr) \ + ns16550_readb(com_port, addr - (unsigned char *)com_port) +#endif + int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) { const unsigned int mode_x_div = 16; @@ -79,7 +140,8 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) */ if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE)) == UART_LSR_THRE) { - NS16550_setbrg(com_port, baud_divisor); + if (baud_divisor != -1) + NS16550_setbrg(com_port, baud_divisor); serial_out(0, &com_port->mdr1); } #endif @@ -95,7 +157,8 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) NS16550_setbrg(com_port, 0); serial_out(UART_MCRVAL, &com_port->mcr); serial_out(UART_FCRVAL, &com_port->fcr); - NS16550_setbrg(com_port, baud_divisor); + if (baud_divisor != -1) + NS16550_setbrg(com_port, baud_divisor); #if defined(CONFIG_OMAP) || \ defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \ defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX) @@ -154,3 +217,92 @@ int NS16550_tstc(NS16550_t com_port) } #endif /* CONFIG_NS16550_MIN_FUNCTIONS */ + +#ifdef CONFIG_DM_SERIAL +static int ns16550_serial_putc(struct udevice *dev, const char ch) +{ + struct NS16550 *const com_port = dev_get_priv(dev); + + if (!(serial_in(&com_port->lsr) & UART_LSR_THRE)) + return -EAGAIN; + serial_out(ch, &com_port->thr); + + /* + * Call watchdog_reset() upon newline. This is done here in putc + * since the environment code uses a single puts() to print the complete + * environment upon "printenv". So we can't put this watchdog call + * in puts(). + */ + if (ch == '\n') + WATCHDOG_RESET(); + + return 0; +} + +static int ns16550_serial_pending(struct udevice *dev, bool input) +{ + struct NS16550 *const com_port = dev_get_priv(dev); + + if (input) + return serial_in(&com_port->lsr) & UART_LSR_DR ? 1 : 0; + else + return serial_in(&com_port->lsr) & UART_LSR_THRE ? 0 : 1; +} + +static int ns16550_serial_getc(struct udevice *dev) +{ + struct NS16550 *const com_port = dev_get_priv(dev); + + if (!serial_in(&com_port->lsr) & UART_LSR_DR) + return -EAGAIN; + + return serial_in(&com_port->rbr); +} + +static int ns16550_serial_setbrg(struct udevice *dev, int baudrate) +{ + struct NS16550 *const com_port = dev_get_priv(dev); + struct ns16550_platdata *plat = com_port->plat; + int clock_divisor; + + clock_divisor = ns16550_calc_divisor(com_port, plat->clock, baudrate); + + NS16550_setbrg(com_port, clock_divisor); + + return 0; +} + +int ns16550_serial_probe(struct udevice *dev) +{ + struct NS16550 *const com_port = dev_get_priv(dev); + + NS16550_init(com_port, -1); + + return 0; +} + +int ns16550_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct NS16550 *const com_port = dev_get_priv(dev); + struct ns16550_platdata *plat = dev->platdata; + fdt_addr_t addr; + + addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg"); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + plat->base = (unsigned char *)addr; + plat->reg_shift = fdtdec_get_int(gd->fdt_blob, dev->of_offset, + "reg-shift", 1); + com_port->plat = plat; + + return 0; +} + +const struct dm_serial_ops ns16550_serial_ops = { + .putc = ns16550_serial_putc, + .pending = ns16550_serial_pending, + .getc = ns16550_serial_getc, + .setbrg = ns16550_serial_setbrg, +}; +#endif /* CONFIG_DM_SERIAL */ -- cgit v1.1 From 858530a8c0a7ce7e573e513934804a00d6676813 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 4 Sep 2014 16:27:36 -0600 Subject: dm: tegra: Enable driver model for serial Use driver model for serial ports. Since Tegra now uses driver model for serial, adjust the definition of V_NS16550_CLK so that it is clear that this is only used for SPL. Signed-off-by: Simon Glass --- drivers/serial/Makefile | 1 + drivers/serial/serial_tegra.c | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) create mode 100644 drivers/serial/serial_tegra.c (limited to 'drivers') diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 5ae6416..853a8c6 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_BFIN_SERIAL) += serial_bfin.o obj-$(CONFIG_FSL_LPUART) += serial_lpuart.o obj-$(CONFIG_MXS_AUART) += mxs_auart.o obj-$(CONFIG_ARC_SERIAL) += serial_arc.o +obj-$(CONFIG_TEGRA_SERIAL) += serial_tegra.o ifndef CONFIG_SPL_BUILD obj-$(CONFIG_USB_TTY) += usbtty.o diff --git a/drivers/serial/serial_tegra.c b/drivers/serial/serial_tegra.c new file mode 100644 index 0000000..7eb70e1 --- /dev/null +++ b/drivers/serial/serial_tegra.c @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include + +static const struct udevice_id tegra_serial_ids[] = { + { .compatible = "nvidia,tegra20-uart" }, + { } +}; + +static int tegra_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct ns16550_platdata *plat = dev_get_platdata(dev); + int ret; + + ret = ns16550_serial_ofdata_to_platdata(dev); + if (ret) + return ret; + plat->clock = V_NS16550_CLK; + + return 0; +} +U_BOOT_DRIVER(serial_ns16550) = { + .name = "serial_tegra20", + .id = UCLASS_SERIAL, + .of_match = tegra_serial_ids, + .ofdata_to_platdata = tegra_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct ns16550_platdata), + .priv_auto_alloc_size = sizeof(struct NS16550), + .probe = ns16550_serial_probe, + .ops = &ns16550_serial_ops, +}; -- cgit v1.1