omap4: cleanup pin mux data

- separate mux settings into essential and non essential parts
- essential part is board independent as of now(so move it
  to SoC directory). Will help in having single SPL for all
  boards.
- Non-essential part(the pins not essential for u-boot to function)
  need to be phased out eventually.
- Correct mux data by aligning to the latest settings in x-loader

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

3 files changed, 129 insertions, 4 deletions

diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
index de4cc2a..3fd6f84 100644
--- a/arch/arm/cpu/armv7/omap4/board.c
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -31,17 +31,65 @@
 #include <asm/arch/cpu.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/sizes.h>
+#include "omap4_mux_data.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
+void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
+{
+	int i;
+	struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
+
+	for (i = 0; i < size; i++, pad++)
+		writew(pad->val, base + pad->offset);
+}
+
+static void set_muxconf_regs_essential(void)
+{
+	do_set_mux(CONTROL_PADCONF_CORE, core_padconf_array_essential,
+		   sizeof(core_padconf_array_essential) /
+		   sizeof(struct pad_conf_entry));
+
+	do_set_mux(CONTROL_PADCONF_WKUP, wkup_padconf_array_essential,
+		   sizeof(wkup_padconf_array_essential) /
+		   sizeof(struct pad_conf_entry));
+}
+
+static void set_mux_conf_regs(void)
+{
+	switch (omap4_hw_init_context()) {
+	case OMAP_INIT_CONTEXT_SPL:
+		set_muxconf_regs_essential();
+		break;
+	case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
+		set_muxconf_regs_non_essential();
+		break;
+	case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
+	case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
+		set_muxconf_regs_essential();
+		set_muxconf_regs_non_essential();
+		break;
+	}
+}
+
 /*
  * Routine: s_init
- * Description: Does early system init of muxing and clocks.
- *              - Called path is with SRAM stack.
+ * Description: Does early system init of watchdog, muxing,  andclocks
+ * Watchdog disable is done always. For the rest what gets done
+ * depends on the boot mode in which this function is executed
+ *   1. s_init of SPL running from SRAM
+ *   2. s_init of U-Boot running from FLASH
+ *   3. s_init of U-Boot loaded to SDRAM by SPL
+ *   4. s_init of U-Boot loaded to SDRAM by ROM code using the
+ *	Configuration Header feature
+ * Please have a look at the respective functions to see what gets
+ * done in each of these cases
+ * This function is called with SRAM stack.
  */
 void s_init(void)
 {
 	watchdog_init();
+	set_mux_conf_regs();
 }
 
 /*
@@ -124,7 +172,6 @@ int checkboard(void)
 */
 int arch_cpu_init(void)
 {
-	set_muxconf_regs();
 	return 0;
 }
 
diff --git a/arch/arm/cpu/armv7/omap4/omap4_mux_data.h b/arch/arm/cpu/armv7/omap4/omap4_mux_data.h
new file mode 100644
index 0000000..00c52f8
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap4/omap4_mux_data.h
@@ -0,0 +1,76 @@
+ /*
+ * (C) Copyright 2010
+ * Texas Instruments Incorporated, <www.ti.com>
+ *
+ *	Balaji Krishnamoorthy	<balajitk@ti.com>
+ *	Aneesh V		<aneesh@ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef _OMAP4_MUX_DATA_H_
+#define _OMAP4_MUX_DATA_H_
+
+#include <asm/arch/mux_omap4.h>
+
+const struct pad_conf_entry core_padconf_array_essential[] = {
+
+{GPMC_AD0, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat0 */
+{GPMC_AD1, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat1 */
+{GPMC_AD2, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat2 */
+{GPMC_AD3, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat3 */
+{GPMC_AD4, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat4 */
+{GPMC_AD5, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat5 */
+{GPMC_AD6, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat6 */
+{GPMC_AD7, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_dat7 */
+{GPMC_NOE, (PTU | IEN | OFF_EN | OFF_OUT_PTD | M1)},	 /* sdmmc2_clk */
+{GPMC_NWE, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M1)}, /* sdmmc2_cmd */
+{SDMMC1_CLK, (PTU | OFF_EN | OFF_OUT_PTD | M0)},	 /* sdmmc1_clk */
+{SDMMC1_CMD, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_cmd */
+{SDMMC1_DAT0, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat0 */
+{SDMMC1_DAT1, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat1 */
+{SDMMC1_DAT2, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat2 */
+{SDMMC1_DAT3, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat3 */
+{SDMMC1_DAT4, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat4 */
+{SDMMC1_DAT5, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat5 */
+{SDMMC1_DAT6, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat6 */
+{SDMMC1_DAT7, (PTU | IEN | OFF_EN | OFF_PD | OFF_IN | M0)}, /* sdmmc1_dat7 */
+{I2C1_SCL, (PTU | IEN | M0)},				/* i2c1_scl */
+{I2C1_SDA, (PTU | IEN | M0)},				/* i2c1_sda */
+{I2C2_SCL, (PTU | IEN | M0)},				/* i2c2_scl */
+{I2C2_SDA, (PTU | IEN | M0)},				/* i2c2_sda */
+{I2C3_SCL, (PTU | IEN | M0)},				/* i2c3_scl */
+{I2C3_SDA, (PTU | IEN | M0)},				/* i2c3_sda */
+{I2C4_SCL, (PTU | IEN | M0)},				/* i2c4_scl */
+{I2C4_SDA, (PTU | IEN | M0)},				/* i2c4_sda */
+{UART3_CTS_RCTX, (PTU | IEN | M0)},			/* uart3_tx */
+{UART3_RTS_SD, (M0)},					/* uart3_rts_sd */
+{UART3_RX_IRRX, (IEN | M0)},				/* uart3_rx */
+{UART3_TX_IRTX, (M0)}					/* uart3_tx */
+
+};
+
+const struct pad_conf_entry wkup_padconf_array_essential[] = {
+
+{PAD1_SR_SCL, (PTU | IEN | M0)}, /* sr_scl */
+{PAD0_SR_SDA, (PTU | IEN | M0)}, /* sr_sda */
+{PAD1_SYS_32K, (IEN | M0)}	 /* sys_32k */
+
+};
+
+#endif  /* _OMAP4_MUX_DATA_H_ */
diff --git a/arch/arm/include/asm/arch-omap4/sys_proto.h b/arch/arm/include/asm/arch-omap4/sys_proto.h
index 6b596b4..3624378 100644
--- a/arch/arm/include/asm/arch-omap4/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap4/sys_proto.h
@@ -24,6 +24,7 @@
 #include <asm/arch/omap4.h>
 #include <asm/io.h>
 #include <asm/omap_common.h>
+#include <asm/arch/mux_omap4.h>
 
 struct omap_sysinfo {
 	char *board_string;
@@ -33,7 +34,8 @@ extern const struct omap_sysinfo sysinfo;
 void gpmc_init(void);
 void watchdog_init(void);
 u32 get_device_type(void);
-void set_muxconf_regs(void);
+void do_set_mux(u32 base, struct pad_conf_entry const *array, int size);
+void set_muxconf_regs_non_essential(void);
 void sr32(void *, u32, u32, u32);
 u32 wait_on_value(u32, u32, void *, u32);
 void sdelay(unsigned long);