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Subject[PATCHv9 12/18] TEMP: serial: added mux support
Date
Just for PRCM chain handler testing purposes. This should be replaced with
a proper implementation.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
arch/arm/mach-omap2/serial.c | 71 ++++++++++++++++++++++++++++++++++++++++-
1 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 3d1c1d3..e08feb1 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -862,17 +862,84 @@ void __init omap_serial_init_port(struct omap_board_data *bdata)
* can call this function when they want to have default behaviour
* for serial ports (e.g initialize them all as serial ports).
*/
+
+struct serial_mux_conf {
+ char *name;
+ int omap3_mux;
+ int omap4_mux;
+};
+
+#define OMAP3_SERIAL_MUX_IN_PU (OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0)
+#define OMAP3_SERIAL_MUX_IN_PD (OMAP_PIN_INPUT_PULLDOWN | OMAP_MUX_MODE0)
+#define OMAP3_SERIAL_MUX_IN (OMAP_PIN_INPUT | OMAP_MUX_MODE0)
+#define OMAP3_SERIAL_MUX_OUT (OMAP_PIN_OUTPUT | OMAP_MUX_MODE0)
+#define OMAP4_SERIAL_MUX_IN_PU (OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0)
+#define OMAP4_SERIAL_MUX_OUT (OMAP_PIN_OUTPUT | OMAP_MUX_MODE0)
+#define OMAP4_SERIAL_MUX_IN (OMAP_PIN_INPUT | OMAP_MUX_MODE0)
+#define SERIAL_DISABLED OMAP_MUX_MODE7
+
+#define OMAP_SERIAL_NUM_PADS_PER_PORT 4
+
+static const struct serial_mux_conf serial_mux_data[] = {
+ { "uart1_cts.uart1_cts", OMAP3_SERIAL_MUX_IN, SERIAL_DISABLED, },
+ { "uart1_rts.uart1_rts", OMAP3_SERIAL_MUX_OUT, SERIAL_DISABLED, },
+ { "uart1_rx.uart1_rx", OMAP3_SERIAL_MUX_IN, SERIAL_DISABLED, },
+ { "uart1_tx.uart1_tx", OMAP3_SERIAL_MUX_OUT, SERIAL_DISABLED, },
+ { "uart2_cts.uart2_cts", OMAP3_SERIAL_MUX_IN,
+ OMAP4_SERIAL_MUX_IN_PU, },
+ { "uart2_rts.uart2_rts", OMAP3_SERIAL_MUX_OUT, OMAP4_SERIAL_MUX_OUT, },
+ { "uart2_rx.uart2_rx", OMAP3_SERIAL_MUX_IN, OMAP4_SERIAL_MUX_IN_PU, },
+ { "uart2_tx.uart2_tx", OMAP3_SERIAL_MUX_OUT, OMAP4_SERIAL_MUX_OUT },
+ { "uart3_cts_rctx.uart3_cts_rctx", OMAP3_SERIAL_MUX_IN_PD,
+ OMAP4_SERIAL_MUX_IN_PU, },
+ { "uart3_rts_sd.uart3_rts_sd", OMAP3_SERIAL_MUX_OUT,
+ OMAP4_SERIAL_MUX_OUT, },
+ { "uart3_rx_irrx.uart3_rx_irrx", OMAP3_SERIAL_MUX_IN,
+ OMAP4_SERIAL_MUX_IN, },
+ { "uart3_tx_irtx.uart3_tx_irtx", OMAP3_SERIAL_MUX_OUT,
+ OMAP4_SERIAL_MUX_OUT, },
+ { "uart4_rx.uart4_rx", SERIAL_DISABLED, OMAP4_SERIAL_MUX_IN, },
+ { "uart4_tx.uart4_tx", SERIAL_DISABLED, OMAP4_SERIAL_MUX_OUT, },
+ { NULL, SERIAL_DISABLED, SERIAL_DISABLED, },
+ { NULL, SERIAL_DISABLED, SERIAL_DISABLED, },
+};
+
void __init omap_serial_init(void)
{
struct omap_uart_state *uart;
struct omap_board_data bdata;
+ struct omap_device_pad *pads;
+ int idx;
+ int i;

+ pads = kmalloc(sizeof(struct omap_device_pad) * 4, GFP_KERNEL);
list_for_each_entry(uart, &uart_list, node) {
bdata.id = uart->num;
bdata.flags = 0;
- bdata.pads = NULL;
bdata.pads_cnt = 0;
+ bdata.pads = pads;
+
+ for (i = 0; i < OMAP_SERIAL_NUM_PADS_PER_PORT; i++) {
+ idx = bdata.id * OMAP_SERIAL_NUM_PADS_PER_PORT + i;
+ pads[i].name = serial_mux_data[idx].name;
+ pads[i].enable = 0;
+ pads[i].idle = 0;
+ pads[i].flags = 0;
+ if (cpu_is_omap34xx())
+ pads[i].enable = serial_mux_data[idx].omap3_mux;
+ if (cpu_is_omap44xx())
+ pads[i].enable = serial_mux_data[idx].omap4_mux;
+ if (pads[i].enable != SERIAL_DISABLED)
+ bdata.pads_cnt++;
+ if (pads[i].enable & OMAP_PIN_INPUT) {
+ pads[i].flags = OMAP_DEVICE_PAD_REMUX |
+ OMAP_DEVICE_PAD_WAKEUP;
+ }
+ pads[i].idle = pads[i].enable;
+ }
+ if (bdata.pads_cnt == 0)
+ bdata.pads = NULL;
omap_serial_init_port(&bdata);
-
}
+ kfree(pads);
}
--
1.7.4.1

Texas Instruments Oy, Tekniikantie 12, 02150 Espoo. Y-tunnus: 0115040-6. Kotipaikka: Helsinki




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