ARM: OMAP2+: Remove legacy serial.c
We can now initialize the UARTs using device tree. Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren
parent
195c7a52b7
commit
f3b78f7289
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@ -6,7 +6,7 @@ ccflags-y := -I$(srctree)/$(src)/include \
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-I$(srctree)/arch/arm/plat-omap/include
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# Common support
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obj-y := id.o io.o control.o mux.o devices.o fb.o serial.o timer.o pm.o \
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obj-y := id.o io.o control.o mux.o devices.o fb.o timer.o pm.o \
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common.o gpio.o dma.o wd_timer.o display.o i2c.o hdq1w.o omap_hwmod.o \
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omap_device.o omap-headsmp.o sram.o drm.o
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@ -1,332 +0,0 @@
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/*
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* arch/arm/mach-omap2/serial.c
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*
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* OMAP2 serial support.
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*
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* Copyright (C) 2005-2008 Nokia Corporation
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* Author: Paul Mundt <paul.mundt@nokia.com>
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*
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* Major rework for PM support by Kevin Hilman
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*
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* Based off of arch/arm/mach-omap/omap1/serial.c
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*
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* Copyright (C) 2009 Texas Instruments
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* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include <linux/console.h>
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#include <linux/omap-dma.h>
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#include <linux/platform_data/serial-omap.h>
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#include "common.h"
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#include "omap_hwmod.h"
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#include "omap_device.h"
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#include "omap-pm.h"
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#include "soc.h"
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#include "prm2xxx_3xxx.h"
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#include "pm.h"
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#include "cm2xxx_3xxx.h"
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#include "prm-regbits-34xx.h"
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#include "control.h"
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#include "mux.h"
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#include "serial.h"
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/*
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* NOTE: By default the serial auto_suspend timeout is disabled as it causes
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* lost characters over the serial ports. This means that the UART clocks will
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* stay on until power/autosuspend_delay is set for the uart from sysfs.
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* This also causes that any deeper omap sleep states are blocked.
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*/
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#define DEFAULT_AUTOSUSPEND_DELAY -1
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#define MAX_UART_HWMOD_NAME_LEN 16
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struct omap_uart_state {
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int num;
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struct list_head node;
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struct omap_hwmod *oh;
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struct omap_device_pad default_omap_uart_pads[2];
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};
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static LIST_HEAD(uart_list);
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static u8 num_uarts;
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static u8 console_uart_id = -1;
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static u8 uart_debug;
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#define DEFAULT_RXDMA_POLLRATE 1 /* RX DMA polling rate (us) */
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#define DEFAULT_RXDMA_BUFSIZE 4096 /* RX DMA buffer size */
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#define DEFAULT_RXDMA_TIMEOUT (3 * HZ)/* RX DMA timeout (jiffies) */
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static struct omap_uart_port_info omap_serial_default_info[] __initdata = {
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{
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.dma_enabled = false,
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.dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE,
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.dma_rx_poll_rate = DEFAULT_RXDMA_POLLRATE,
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.dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT,
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.autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY,
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},
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};
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#ifdef CONFIG_PM
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static void omap_uart_enable_wakeup(struct device *dev, bool enable)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct omap_device *od = to_omap_device(pdev);
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if (!od)
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return;
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if (enable)
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omap_hwmod_enable_wakeup(od->hwmods[0]);
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else
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omap_hwmod_disable_wakeup(od->hwmods[0]);
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}
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#else
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static void omap_uart_enable_wakeup(struct device *dev, bool enable)
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{}
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#endif /* CONFIG_PM */
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#ifdef CONFIG_OMAP_MUX
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#define OMAP_UART_DEFAULT_PAD_NAME_LEN 28
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static char rx_pad_name[OMAP_UART_DEFAULT_PAD_NAME_LEN],
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tx_pad_name[OMAP_UART_DEFAULT_PAD_NAME_LEN] __initdata;
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static void __init
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omap_serial_fill_uart_tx_rx_pads(struct omap_board_data *bdata,
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struct omap_uart_state *uart)
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{
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uart->default_omap_uart_pads[0].name = rx_pad_name;
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uart->default_omap_uart_pads[0].flags = OMAP_DEVICE_PAD_REMUX |
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OMAP_DEVICE_PAD_WAKEUP;
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uart->default_omap_uart_pads[0].enable = OMAP_PIN_INPUT |
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OMAP_MUX_MODE0;
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uart->default_omap_uart_pads[0].idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0;
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uart->default_omap_uart_pads[1].name = tx_pad_name;
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uart->default_omap_uart_pads[1].enable = OMAP_PIN_OUTPUT |
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OMAP_MUX_MODE0;
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bdata->pads = uart->default_omap_uart_pads;
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bdata->pads_cnt = ARRAY_SIZE(uart->default_omap_uart_pads);
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}
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static void __init omap_serial_check_wakeup(struct omap_board_data *bdata,
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struct omap_uart_state *uart)
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{
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struct omap_mux_partition *tx_partition = NULL, *rx_partition = NULL;
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struct omap_mux *rx_mux = NULL, *tx_mux = NULL;
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char *rx_fmt, *tx_fmt;
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int uart_nr = bdata->id + 1;
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if (bdata->id != 2) {
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rx_fmt = "uart%d_rx.uart%d_rx";
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tx_fmt = "uart%d_tx.uart%d_tx";
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} else {
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rx_fmt = "uart%d_rx_irrx.uart%d_rx_irrx";
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tx_fmt = "uart%d_tx_irtx.uart%d_tx_irtx";
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}
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snprintf(rx_pad_name, OMAP_UART_DEFAULT_PAD_NAME_LEN, rx_fmt,
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uart_nr, uart_nr);
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snprintf(tx_pad_name, OMAP_UART_DEFAULT_PAD_NAME_LEN, tx_fmt,
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uart_nr, uart_nr);
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if (omap_mux_get_by_name(rx_pad_name, &rx_partition, &rx_mux) >= 0 &&
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omap_mux_get_by_name
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(tx_pad_name, &tx_partition, &tx_mux) >= 0) {
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u16 tx_mode, rx_mode;
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tx_mode = omap_mux_read(tx_partition, tx_mux->reg_offset);
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rx_mode = omap_mux_read(rx_partition, rx_mux->reg_offset);
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/*
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* Check if uart is used in default tx/rx mode i.e. in mux mode0
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* if yes then configure rx pin for wake up capability
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*/
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if (OMAP_MODE_UART(rx_mode) && OMAP_MODE_UART(tx_mode))
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omap_serial_fill_uart_tx_rx_pads(bdata, uart);
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}
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}
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#else
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static void __init omap_serial_check_wakeup(struct omap_board_data *bdata,
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struct omap_uart_state *uart)
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{
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}
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#endif
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static char *cmdline_find_option(char *str)
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{
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extern char *saved_command_line;
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return strstr(saved_command_line, str);
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}
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static int __init omap_serial_early_init(void)
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{
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if (of_have_populated_dt())
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return -ENODEV;
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do {
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char oh_name[MAX_UART_HWMOD_NAME_LEN];
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struct omap_hwmod *oh;
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struct omap_uart_state *uart;
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char uart_name[MAX_UART_HWMOD_NAME_LEN];
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snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN,
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"uart%d", num_uarts + 1);
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oh = omap_hwmod_lookup(oh_name);
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if (!oh)
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break;
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uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL);
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if (WARN_ON(!uart))
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return -ENODEV;
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uart->oh = oh;
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uart->num = num_uarts++;
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list_add_tail(&uart->node, &uart_list);
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snprintf(uart_name, MAX_UART_HWMOD_NAME_LEN,
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"%s%d", OMAP_SERIAL_NAME, uart->num);
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if (cmdline_find_option(uart_name)) {
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console_uart_id = uart->num;
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if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG) {
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uart_debug = true;
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pr_info("%s used as console in debug mode: uart%d clocks will not be gated",
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uart_name, uart->num);
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}
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}
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} while (1);
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return 0;
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}
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omap_postcore_initcall(omap_serial_early_init);
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/**
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* omap_serial_init_port() - initialize single serial port
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* @bdata: port specific board data pointer
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* @info: platform specific data pointer
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*
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* This function initialies serial driver for given port only.
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* Platforms can call this function instead of omap_serial_init()
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* if they don't plan to use all available UARTs as serial ports.
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*
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* Don't mix calls to omap_serial_init_port() and omap_serial_init(),
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* use only one of the two.
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*/
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void __init omap_serial_init_port(struct omap_board_data *bdata,
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struct omap_uart_port_info *info)
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{
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struct omap_uart_state *uart;
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struct omap_hwmod *oh;
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struct platform_device *pdev;
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void *pdata = NULL;
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u32 pdata_size = 0;
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char *name;
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struct omap_uart_port_info omap_up;
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if (WARN_ON(!bdata))
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return;
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if (WARN_ON(bdata->id < 0))
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return;
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if (WARN_ON(bdata->id >= num_uarts))
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return;
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list_for_each_entry(uart, &uart_list, node)
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if (bdata->id == uart->num)
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break;
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if (!info)
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info = omap_serial_default_info;
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oh = uart->oh;
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name = OMAP_SERIAL_DRIVER_NAME;
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omap_up.dma_enabled = info->dma_enabled;
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omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
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omap_up.flags = UPF_BOOT_AUTOCONF;
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omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
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omap_up.enable_wakeup = omap_uart_enable_wakeup;
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omap_up.dma_rx_buf_size = info->dma_rx_buf_size;
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omap_up.dma_rx_timeout = info->dma_rx_timeout;
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omap_up.dma_rx_poll_rate = info->dma_rx_poll_rate;
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omap_up.autosuspend_timeout = info->autosuspend_timeout;
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pdata = &omap_up;
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pdata_size = sizeof(struct omap_uart_port_info);
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if (WARN_ON(!oh))
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return;
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pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size);
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if (IS_ERR(pdev)) {
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WARN(1, "Could not build omap_device for %s: %s.\n", name,
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oh->name);
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return;
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}
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oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);
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if (console_uart_id == bdata->id) {
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omap_device_enable(pdev);
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pm_runtime_set_active(&pdev->dev);
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}
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oh->dev_attr = uart;
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if (((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads)
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&& !uart_debug)
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device_init_wakeup(&pdev->dev, true);
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}
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/**
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* omap_serial_board_init() - initialize all supported serial ports
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* @info: platform specific data pointer
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*
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* Initializes all available UARTs as serial ports. Platforms
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* can call this function when they want to have default behaviour
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* for serial ports (e.g initialize them all as serial ports).
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*/
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void __init omap_serial_board_init(struct omap_uart_port_info *info)
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{
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struct omap_uart_state *uart;
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struct omap_board_data bdata;
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list_for_each_entry(uart, &uart_list, node) {
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bdata.id = uart->num;
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bdata.flags = 0;
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bdata.pads = NULL;
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bdata.pads_cnt = 0;
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omap_serial_check_wakeup(&bdata, uart);
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if (!info)
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omap_serial_init_port(&bdata, NULL);
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else
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omap_serial_init_port(&bdata, &info[uart->num]);
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}
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}
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/**
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* omap_serial_init() - initialize all supported serial ports
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*
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* Initializes all available UARTs.
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* Platforms can call this function when they want to have default behaviour
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* for serial ports (e.g initialize them all as serial ports).
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*/
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void __init omap_serial_init(void)
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{
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omap_serial_board_init(NULL);
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}
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