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Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
-rw-r--r--arch/arm/mach-omap2/serial.c114
1 files changed, 80 insertions, 34 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 619f864..c1b93c7 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -57,6 +57,7 @@ struct omap_uart_state {
struct list_head node;
struct omap_hwmod *oh;
+ struct omap_device_pad default_omap_uart_pads[2];
};
static LIST_HEAD(uart_list);
@@ -126,14 +127,73 @@ 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)
+
+#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 omap_serial_fill_default_pads(struct omap_board_data *bdata) {}
+static void __init omap_serial_check_wakeup(struct omap_board_data *bdata,
+ struct omap_uart_state *uart)
+{
+}
#endif
-char *cmdline_find_option(char *str)
+static char *cmdline_find_option(char *str)
{
extern char *saved_command_line;
@@ -245,14 +305,6 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
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);
@@ -279,32 +331,29 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
/**
* omap_serial_board_init() - initialize all supported serial ports
* @info: platform specific data pointer
- * @port_id: uart port number to be initialised
*
- * Initializes individual UARTs as serial ports. Platforms
+ * 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 individual serial ports based on port id).
+ * for serial ports (e.g initialize them all as serial ports).
*/
-void __init omap_serial_board_init(struct omap_uart_port_info *info, u8 port_id)
+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)
- if (uart->num == port_id) {
- bdata.id = uart->num;
- bdata.flags = 0;
- bdata.pads = NULL;
- bdata.pads_cnt = 0;
-
- if (!cpu_is_omap24xx())
- omap_serial_fill_default_pads(&bdata);
-
- if (!info)
- omap_serial_init_port(&bdata, NULL);
- else
- omap_serial_init_port(&bdata, info);
- }
+ 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]);
+ }
}
/**
@@ -316,8 +365,5 @@ void __init omap_serial_board_init(struct omap_uart_port_info *info, u8 port_id)
*/
void __init omap_serial_init(void)
{
- struct omap_uart_state *uart;
-
- list_for_each_entry(uart, &uart_list, node)
- omap_serial_board_init(NULL, uart->num);
+ omap_serial_board_init(NULL);
}