mainboard/intel/galileo: Add I2C chip initialization
Add I2C chip initialization for the Galileo boards.
TEST=Build and run on Galileo Gen2
Change-Id: Ib5284d5cd7a67de2f3f98940837ceb2aa69af468
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/14829
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/intel/galileo/reg_access.c b/src/mainboard/intel/galileo/reg_access.c
new file mode 100644
index 0000000..f19f526
--- /dev/null
+++ b/src/mainboard/intel/galileo/reg_access.c
@@ -0,0 +1,93 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied wacbmem_entryanty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define __SIMPLE_DEVICE__
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/i2c.h>
+#include <soc/pci_devs.h>
+#include <soc/reg_access.h>
+#include "reg_access.h"
+
+#if ENV_RAMSTAGE
+static uint64_t reg_read(struct reg_script_context *ctx)
+{
+ int ret_code;
+ const struct reg_script *step;
+ uint8_t value = 0;
+
+ step = ctx->step;
+ switch (step->id) {
+ default:
+ printk(BIOS_ERR,
+ "ERROR - Unknown register set (0x%08x)!\n",
+ step->id);
+ ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING;
+ break;
+
+ case GEN1_I2C_GPIO_EXP_0x20:
+ case GEN1_I2C_GPIO_EXP_0x21:
+ case GEN2_I2C_GPIO_EXP0:
+ case GEN2_I2C_GPIO_EXP1:
+ case GEN2_I2C_GPIO_EXP2:
+ case GEN2_I2C_LED_PWM:
+ if (ctx->display_features)
+ printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id);
+ ret_code = i2c_readb(0, step->id, (UINT8)step->reg, &value);
+ ASSERT(ret_code == 2);
+ break;
+ }
+ return value;
+}
+
+static void reg_write(struct reg_script_context *ctx)
+{
+ int ret_code;
+ const struct reg_script *step;
+ uint8_t value;
+
+ step = ctx->step;
+ switch (step->id) {
+ default:
+ printk(BIOS_ERR,
+ "ERROR - Unknown register set (0x%08x)!\n",
+ step->id);
+ ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING;
+ break;
+
+ case GEN1_I2C_GPIO_EXP_0x20:
+ case GEN1_I2C_GPIO_EXP_0x21:
+ case GEN2_I2C_GPIO_EXP0:
+ case GEN2_I2C_GPIO_EXP1:
+ case GEN2_I2C_GPIO_EXP2:
+ case GEN2_I2C_LED_PWM:
+ case RMU_TEMP_REGS:
+ if (ctx->display_features)
+ printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id);
+ value = (UINT8)step->value;
+ ret_code = i2c_writeb(0, step->id, (UINT8)step->reg, value);
+ ASSERT(ret_code == 2);
+ break;
+ }
+}
+
+const struct reg_script_bus_entry mainboard_reg_script_bus_table = {
+ MAINBOARD_TYPE, reg_read, reg_write
+};
+
+REG_SCRIPT_BUS_ENTRY(mainboard_reg_script_bus_table);
+
+#endif /* ENV_RAMSTAGE */