diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/serial.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-omap2/serial.c | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/serial.c b/ANDROID_3.4.5/arch/arm/mach-omap2/serial.c deleted file mode 100644 index 9fc2f441..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-omap2/serial.c +++ /dev/null @@ -1,318 +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 <plat/omap-serial.h> -#include "common.h" -#include <plat/board.h> -#include <plat/dma.h> -#include <plat/omap_hwmod.h> -#include <plat/omap_device.h> -#include <plat/omap-pm.h> - -#include "prm2xxx_3xxx.h" -#include "pm.h" -#include "cm2xxx_3xxx.h" -#include "prm-regbits-34xx.h" -#include "control.h" -#include "mux.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; -}; - -static LIST_HEAD(uart_list); -static u8 num_uarts; -static u8 console_uart_id = -1; -static u8 no_console_suspend; -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 platform_device *pdev, bool enable) -{ - 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]); -} - -/* - * Errata i291: [UART]:Cannot Acknowledge Idle Requests - * in Smartidle Mode When Configured for DMA Operations. - * WA: configure uart in force idle mode. - */ -static void omap_uart_set_noidle(struct platform_device *pdev) -{ - struct omap_device *od = to_omap_device(pdev); - - omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO); -} - -static void omap_uart_set_smartidle(struct platform_device *pdev) -{ - struct omap_device *od = to_omap_device(pdev); - u8 idlemode; - - if (od->hwmods[0]->class->sysc->idlemodes & SIDLE_SMART_WKUP) - idlemode = HWMOD_IDLEMODE_SMART_WKUP; - else - idlemode = HWMOD_IDLEMODE_SMART; - - omap_hwmod_set_slave_idlemode(od->hwmods[0], idlemode); -} - -#else -static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) -{} -static void omap_uart_set_noidle(struct platform_device *pdev) {} -static void omap_uart_set_smartidle(struct platform_device *pdev) {} -#endif /* CONFIG_PM */ - -#ifdef CONFIG_OMAP_MUX -static void omap_serial_fill_default_pads(struct omap_board_data *bdata) -{ -} -#else -static void omap_serial_fill_default_pads(struct omap_board_data *bdata) {} -#endif - -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) -{ - 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 >= 10) { - uart_debug = true; - pr_info("%s used as console in debug mode" - " uart%d clocks will not be" - " gated", uart_name, uart->num); - } - - if (cmdline_find_option("no_console_suspend")) - no_console_suspend = true; - - /* - * omap-uart can be used for earlyprintk logs - * So if omap-uart is used as console then prevent - * uart reset and idle to get logs from omap-uart - * until uart console driver is available to take - * care for console messages. - * Idling or resetting omap-uart while printing logs - * early boot logs can stall the boot-up. - */ - oh->flags |= HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET; - } - } while (1); - - return 0; -} -core_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 = 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.set_forceidle = omap_uart_set_smartidle; - omap_up.set_noidle = omap_uart_set_noidle; - 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; - - /* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */ - if (!cpu_is_omap2420() && !cpu_is_ti816x()) - omap_up.errata |= UART_ERRATA_i202_MDR1_ACCESS; - - /* Enable DMA Mode Force Idle Errata i291 for omap34xx/3630 */ - if (cpu_is_omap34xx() || cpu_is_omap3630()) - omap_up.errata |= UART_ERRATA_i291_DMA_FORCEIDLE; - - 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, - NULL, 0, false); - WARN(IS_ERR(pdev), "Could not build omap_device for %s: %s.\n", - name, oh->name); - - if ((console_uart_id == bdata->id) && no_console_suspend) - omap_device_disable_idle_on_suspend(pdev); - - oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt); - - 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; - - if (cpu_is_omap44xx() || cpu_is_omap34xx()) - omap_serial_fill_default_pads(&bdata); - - 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); -} |