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Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
| -rw-r--r-- | arch/arm/mach-omap2/serial.c | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c deleted file mode 100644 index 8e072de89fed..000000000000 --- a/arch/arm/mach-omap2/serial.c +++ /dev/null @@ -1,332 +0,0 @@ -/* - * arch/arm/mach-omap2/serial.c - * - * OMAP2 serial support. - * - * Copyright (C) 2005-2008 Nokia Corporation - * Author: Paul Mundt <paul.mundt@nokia.com> - * - * Major rework for PM support by Kevin Hilman - * - * Based off of arch/arm/mach-omap/omap1/serial.c - * - * Copyright (C) 2009 Texas Instruments - * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/pm_runtime.h> -#include <linux/console.h> -#include <linux/omap-dma.h> -#include <linux/platform_data/serial-omap.h> - -#include "common.h" -#include "omap_hwmod.h" -#include "omap_device.h" -#include "omap-pm.h" -#include "soc.h" -#include "prm2xxx_3xxx.h" -#include "pm.h" -#include "cm2xxx_3xxx.h" -#include "prm-regbits-34xx.h" -#include "control.h" -#include "mux.h" -#include "serial.h" - -/* - * NOTE: By default the serial auto_suspend timeout is disabled as it causes - * lost characters over the serial ports. This means that the UART clocks will - * stay on until power/autosuspend_delay is set for the uart from sysfs. - * This also causes that any deeper omap sleep states are blocked. - */ -#define DEFAULT_AUTOSUSPEND_DELAY -1 - -#define MAX_UART_HWMOD_NAME_LEN 16 - -struct omap_uart_state { - int num; - - struct list_head node; - struct omap_hwmod *oh; - struct omap_device_pad default_omap_uart_pads[2]; -}; - -static LIST_HEAD(uart_list); -static u8 num_uarts; -static u8 console_uart_id = -1; -static u8 uart_debug; - -#define DEFAULT_RXDMA_POLLRATE 1 /* RX DMA polling rate (us) */ -#define DEFAULT_RXDMA_BUFSIZE 4096 /* RX DMA buffer size */ -#define DEFAULT_RXDMA_TIMEOUT (3 * HZ)/* RX DMA timeout (jiffies) */ - -static struct omap_uart_port_info omap_serial_default_info[] __initdata = { - { - .dma_enabled = false, - .dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE, - .dma_rx_poll_rate = DEFAULT_RXDMA_POLLRATE, - .dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT, - .autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY, - }, -}; - -#ifdef CONFIG_PM -static void omap_uart_enable_wakeup(struct device *dev, bool enable) -{ - struct platform_device *pdev = to_platform_device(dev); - struct omap_device *od = to_omap_device(pdev); - - if (!od) - return; - - if (enable) - omap_hwmod_enable_wakeup(od->hwmods[0]); - else - omap_hwmod_disable_wakeup(od->hwmods[0]); -} - -#else -static void omap_uart_enable_wakeup(struct device *dev, bool enable) -{} -#endif /* CONFIG_PM */ - -#ifdef CONFIG_OMAP_MUX - -#define OMAP_UART_DEFAULT_PAD_NAME_LEN 28 -static char rx_pad_name[OMAP_UART_DEFAULT_PAD_NAME_LEN], - tx_pad_name[OMAP_UART_DEFAULT_PAD_NAME_LEN] __initdata; - -static void __init -omap_serial_fill_uart_tx_rx_pads(struct omap_board_data *bdata, - struct omap_uart_state *uart) -{ - uart->default_omap_uart_pads[0].name = rx_pad_name; - uart->default_omap_uart_pads[0].flags = OMAP_DEVICE_PAD_REMUX | - OMAP_DEVICE_PAD_WAKEUP; - uart->default_omap_uart_pads[0].enable = OMAP_PIN_INPUT | - OMAP_MUX_MODE0; - uart->default_omap_uart_pads[0].idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0; - uart->default_omap_uart_pads[1].name = tx_pad_name; - uart->default_omap_uart_pads[1].enable = OMAP_PIN_OUTPUT | - OMAP_MUX_MODE0; - bdata->pads = uart->default_omap_uart_pads; - bdata->pads_cnt = ARRAY_SIZE(uart->default_omap_uart_pads); -} - -static void __init omap_serial_check_wakeup(struct omap_board_data *bdata, - struct omap_uart_state *uart) -{ - struct omap_mux_partition *tx_partition = NULL, *rx_partition = NULL; - struct omap_mux *rx_mux = NULL, *tx_mux = NULL; - char *rx_fmt, *tx_fmt; - int uart_nr = bdata->id + 1; - - if (bdata->id != 2) { - rx_fmt = "uart%d_rx.uart%d_rx"; - tx_fmt = "uart%d_tx.uart%d_tx"; - } else { - rx_fmt = "uart%d_rx_irrx.uart%d_rx_irrx"; - tx_fmt = "uart%d_tx_irtx.uart%d_tx_irtx"; - } - - snprintf(rx_pad_name, OMAP_UART_DEFAULT_PAD_NAME_LEN, rx_fmt, - uart_nr, uart_nr); - snprintf(tx_pad_name, OMAP_UART_DEFAULT_PAD_NAME_LEN, tx_fmt, - uart_nr, uart_nr); - - if (omap_mux_get_by_name(rx_pad_name, &rx_partition, &rx_mux) >= 0 && - omap_mux_get_by_name - (tx_pad_name, &tx_partition, &tx_mux) >= 0) { - u16 tx_mode, rx_mode; - - tx_mode = omap_mux_read(tx_partition, tx_mux->reg_offset); - rx_mode = omap_mux_read(rx_partition, rx_mux->reg_offset); - - /* - * Check if uart is used in default tx/rx mode i.e. in mux mode0 - * if yes then configure rx pin for wake up capability - */ - if (OMAP_MODE_UART(rx_mode) && OMAP_MODE_UART(tx_mode)) - omap_serial_fill_uart_tx_rx_pads(bdata, uart); - } -} -#else -static void __init omap_serial_check_wakeup(struct omap_board_data *bdata, - struct omap_uart_state *uart) -{ -} -#endif - -static char *cmdline_find_option(char *str) -{ - extern char *saved_command_line; - - return strstr(saved_command_line, str); -} - -static int __init omap_serial_early_init(void) -{ - if (of_have_populated_dt()) - return -ENODEV; - - do { - char oh_name[MAX_UART_HWMOD_NAME_LEN]; - struct omap_hwmod *oh; - struct omap_uart_state *uart; - char uart_name[MAX_UART_HWMOD_NAME_LEN]; - - snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN, - "uart%d", num_uarts + 1); - oh = omap_hwmod_lookup(oh_name); - if (!oh) - break; - - uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL); - if (WARN_ON(!uart)) - return -ENODEV; - - uart->oh = oh; - uart->num = num_uarts++; - list_add_tail(&uart->node, &uart_list); - snprintf(uart_name, MAX_UART_HWMOD_NAME_LEN, - "%s%d", OMAP_SERIAL_NAME, uart->num); - - if (cmdline_find_option(uart_name)) { - console_uart_id = uart->num; - - if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG) { - uart_debug = true; - pr_info("%s used as console in debug mode: uart%d clocks will not be gated", - uart_name, uart->num); - } - } - } while (1); - - return 0; -} -omap_postcore_initcall(omap_serial_early_init); - -/** - * omap_serial_init_port() - initialize single serial port - * @bdata: port specific board data pointer - * @info: platform specific data pointer - * - * This function initialies serial driver for given port only. - * Platforms can call this function instead of omap_serial_init() - * if they don't plan to use all available UARTs as serial ports. - * - * Don't mix calls to omap_serial_init_port() and omap_serial_init(), - * use only one of the two. - */ -void __init omap_serial_init_port(struct omap_board_data *bdata, - struct omap_uart_port_info *info) -{ - struct omap_uart_state *uart; - struct omap_hwmod *oh; - struct platform_device *pdev; - void *pdata = NULL; - u32 pdata_size = 0; - char *name; - struct omap_uart_port_info omap_up; - - if (WARN_ON(!bdata)) - return; - if (WARN_ON(bdata->id < 0)) - return; - if (WARN_ON(bdata->id >= num_uarts)) - return; - - list_for_each_entry(uart, &uart_list, node) - if (bdata->id == uart->num) - break; - if (!info) - info = omap_serial_default_info; - - oh = uart->oh; - name = OMAP_SERIAL_DRIVER_NAME; - - omap_up.dma_enabled = info->dma_enabled; - omap_up.uartclk = OMAP24XX_BASE_BAUD * 16; - omap_up.flags = UPF_BOOT_AUTOCONF; - omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count; - omap_up.enable_wakeup = omap_uart_enable_wakeup; - omap_up.dma_rx_buf_size = info->dma_rx_buf_size; - omap_up.dma_rx_timeout = info->dma_rx_timeout; - omap_up.dma_rx_poll_rate = info->dma_rx_poll_rate; - omap_up.autosuspend_timeout = info->autosuspend_timeout; - - pdata = &omap_up; - pdata_size = sizeof(struct omap_uart_port_info); - - if (WARN_ON(!oh)) - return; - - pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size); - if (IS_ERR(pdev)) { - WARN(1, "Could not build omap_device for %s: %s.\n", name, - oh->name); - return; - } - - oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt); - - if (console_uart_id == bdata->id) { - omap_device_enable(pdev); - pm_runtime_set_active(&pdev->dev); - } - - oh->dev_attr = uart; - - if (((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads) - && !uart_debug) - device_init_wakeup(&pdev->dev, true); -} - -/** - * omap_serial_board_init() - initialize all supported serial ports - * @info: platform specific data pointer - * - * Initializes all available UARTs as serial ports. Platforms - * can call this function when they want to have default behaviour - * for serial ports (e.g initialize them all as serial ports). - */ -void __init omap_serial_board_init(struct omap_uart_port_info *info) -{ - struct omap_uart_state *uart; - struct omap_board_data bdata; - - list_for_each_entry(uart, &uart_list, node) { - bdata.id = uart->num; - bdata.flags = 0; - bdata.pads = NULL; - bdata.pads_cnt = 0; - - omap_serial_check_wakeup(&bdata, uart); - - if (!info) - omap_serial_init_port(&bdata, NULL); - else - omap_serial_init_port(&bdata, &info[uart->num]); - } -} - -/** - * omap_serial_init() - initialize all supported serial ports - * - * Initializes all available UARTs. - * Platforms can call this function when they want to have default behaviour - * for serial ports (e.g initialize them all as serial ports). - */ -void __init omap_serial_init(void) -{ - omap_serial_board_init(NULL); -} |