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-rw-r--r--src/soc/intel/baytrail/Makefile.inc2
-rw-r--r--src/soc/intel/baytrail/baytrail/gpio.h178
-rw-r--r--src/soc/intel/baytrail/gpio.c166
-rw-r--r--src/soc/intel/baytrail/ramstage.c8
4 files changed, 342 insertions, 12 deletions
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc
index 756fd39f8f..ebcda6b93e 100644
--- a/src/soc/intel/baytrail/Makefile.inc
+++ b/src/soc/intel/baytrail/Makefile.inc
@@ -18,7 +18,7 @@ ramstage-y += iosf.c
romstage-y += iosf.c
ramstage-y += northcluster.c
ramstage-y += ramstage.c
-
+ramstage-y += gpio.c
# Remove as ramstage gets fleshed out
ramstage-y += placeholders.c
diff --git a/src/soc/intel/baytrail/baytrail/gpio.h b/src/soc/intel/baytrail/baytrail/gpio.h
index 68e32416fc..32b991edd9 100644
--- a/src/soc/intel/baytrail/baytrail/gpio.h
+++ b/src/soc/intel/baytrail/baytrail/gpio.h
@@ -24,20 +24,181 @@
#include <arch/io.h>
#include <baytrail/iomap.h>
-/* Registers sitting behind the IO_BASE_ADDRESS */
+/* #define GPIO_DEBUG */
-#define SCORE_PCONF_OFFSET 0x0000
-#define SSUS_PCONF_OFFSET 0x2000
+/* Pad base, ex. PAD_CONF0[n]= PAD_BASE+16*n */
+#define GPSCORE_PAD_BASE IO_BASE_ADDRESS + 0x0000
+#define GPNCORE_PAD_BASE IO_BASE_ADDRESS + 0x1000
+#define GPSSUS_PAD_BASE IO_BASE_ADDRESS + 0x2000
+
+/* Pad register offset */
+#define PAD_CONF0_REG 0x0
+#define PAD_CONF1_REG 0x4
+#define PAD_VAL_REG 0x8
+
+/* Legacy IO register base */
+#define GPSCORE_LEGACY_BASE GPIO_BASE_ADDRESS + 0x00
+#define GPSSUS_LEGACY_BASE GPIO_BASE_ADDRESS + 0x80
+/* Some banks have no legacy GPIO interface */
+#define GP_LEGACY_BASE_NONE 0xFFFF
+
+#define LEGACY_USE_SEL_REG 0x00
+#define LEGACY_IO_SEL_REG 0x04
+#define LEGACY_GP_LVL_REG 0x08
+#define LEGACY_TPE_REG 0x0C
+#define LEGACY_TNE_REG 0x10
+#define LEGACY_TS_REG 0x14
+#define LEGACY_WAKE_EN_REG 0x18
+
+/* Number of GPIOs in each bank */
+#define GPNCORE_COUNT 27
+#define GPSCORE_COUNT 102
+#define GPSSUS_COUNT 44
+
+/* GPIO legacy IO register settings */
+#define GPIO_USE_PAD 0
+#define GPIO_USE_LEGACY 1
+
+#define GPIO_DIR_OUTPUT 0
+#define GPIO_DIR_INPUT 1
+
+#define GPIO_LEVEL_LOW 0
+#define GPIO_LEVEL_HIGH 1
+
+#define GPIO_PEDGE_DISABLE 0
+#define GPIO_PEDGE_ENABLE 1
+
+#define GPIO_NEDGE_DISABLE 0
+#define GPIO_NEDGE_ENABLE 1
+
+/* PAD_CONF0 settings */
+#define PAD_IRQ_EN (1 << 27)
+#define PAD_LEVEL_IRQ (1 << 24)
+
+#define PAD_PU_2K (0 << 9)
+#define PAD_PU_10K (1 << 9)
+#define PAD_PU_20K (2 << 9)
+#define PAD_PU_40K (3 << 9)
+
+#define PAD_PU_DISABLE (0 << 7)
+#define PAD_PU_UP (1 << 7)
+#define PAD_PU_DOWN (2 << 7)
+
+#define PAD_FUNC0 0x0
+#define PAD_FUNC1 0x1
+#define PAD_FUNC2 0x2
+#define PAD_FUNC3 0x3
+#define PAD_FUNC4 0x4
+#define PAD_FUNC5 0x5
+#define PAD_FUNC6 0x6
+
+/* PAD_VAL settings */
+#define PAD_INPUT_ENABLE (1 << 2)
+#define PAD_OUTPUT_ENABLE (1 << 1)
+
+/* End marker */
+#define GPIO_LIST_END 0xffffffff
+
+#define GPIO_INPUT_PU_10K \
+ { .pad_conf0 = PAD_PU_10K | PAD_PU_UP, \
+ .pad_val = PAD_INPUT_ENABLE, \
+ .use_sel = GPIO_USE_LEGACY, \
+ .io_sel = GPIO_DIR_INPUT }
+
+#define GPIO_OUT_LOW \
+ { .pad_conf0 = PAD_PU_DISABLE, \
+ .pad_val = PAD_OUTPUT_ENABLE, \
+ .use_sel = GPIO_USE_LEGACY, \
+ .io_sel = GPIO_DIR_OUTPUT, \
+ .gp_lvl = GPIO_LEVEL_LOW }
+
+#define GPIO_OUT_HIGH \
+ { .pad_conf0 = PAD_PU_DISABLE, \
+ .pad_val = PAD_OUTPUT_ENABLE, \
+ .use_sel = GPIO_USE_LEGACY, \
+ .io_sel = GPIO_DIR_OUTPUT, \
+ .gp_lvl = GPIO_LEVEL_HIGH }
+
+#define GPIO_FUNC0 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC0 }
+
+#define GPIO_FUNC1 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC1 }
+
+#define GPIO_FUNC2 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC2 }
+
+#define GPIO_FUNC3 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC3 }
+
+#define GPIO_FUNC4 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC4 }
+
+#define GPIO_FUNC5 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC5 }
+
+#define GPIO_FUNC6 \
+ { .use_sel = GPIO_USE_PAD, \
+ .pad_conf0 = PAD_FUNC6 }
+
+#define GPIO_END \
+ { .pad_conf0 = GPIO_LIST_END }
+
+/* Common default GPIO settings */
+#define GPIO_INPUT GPIO_INPUT_PU_10K
+#define GPIO_UNUSED GPIO_INPUT_PU_10K
+#define GPIO_DEFAULT GPIO_FUNC0
+
+struct soc_gpio_map {
+ u32 pad_conf0;
+ u32 pad_conf1;
+ u32 pad_val;
+ u8 use_sel : 1;
+ u8 io_sel : 1;
+ u8 gp_lvl : 1;
+ u8 tpe : 1;
+ u8 tne : 1;
+ u8 wake_en : 1;
+} __attribute__ ((packed));
+
+struct soc_gpio_config {
+ const struct soc_gpio_map *ncore;
+ const struct soc_gpio_map *score;
+ const struct soc_gpio_map *ssus;
+};
+
+/* Description of GPIO 'bank' ex. {ncore, score. ssus} */
+struct gpio_bank {
+ const int gpio_count;
+ const u8* gpio_to_pad;
+ const int legacy_base;
+ const unsigned long pad_base;
+ const u8 has_wake_en :1;
+};
+
+void setup_soc_gpios(struct soc_gpio_config *config);
+/* This function is weak and can be overridden by a mainboard function. */
+struct soc_gpio_config* mainboard_get_gpios(void);
+
+/* Functions / defines for changing GPIOs in romstage */
+/* SCORE Pad definitions. */
+#define PCU_SMB_CLK_PAD 88
+#define PCU_SMB_DATA_PAD 90
static inline unsigned int score_pconf0(int pad_num)
{
- return IO_BASE_ADDRESS + SCORE_PCONF_OFFSET + pad_num * 16;
+ return GPSCORE_PAD_BASE + pad_num * 16;
}
-
static inline unsigned int ssus_pconf0(int pad_num)
{
- return IO_BASE_ADDRESS + SSUS_PCONF_OFFSET + pad_num * 16;
+ return GPSSUS_PAD_BASE + pad_num * 16;
}
static inline void score_select_func(int pad, int func)
@@ -62,9 +223,4 @@ static inline void ssus_select_func(int pad, int func)
write32(pconf0_addr, reg);
}
-/* SCORE Pad definitions. */
-#define PCU_SMB_CLK_PAD 88
-#define PCU_SMB_DATA_PAD 90
-#define PCU_SMB_ALERT_PAD 92
-
#endif /* _BAYTRAIL_GPIO_H_ */
diff --git a/src/soc/intel/baytrail/gpio.c b/src/soc/intel/baytrail/gpio.c
new file mode 100644
index 0000000000..8118aeb755
--- /dev/null
+++ b/src/soc/intel/baytrail/gpio.c
@@ -0,0 +1,166 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <baytrail/gpio.h>
+#include <device/pci.h>
+#include <console/console.h>
+
+/* GPIO-to-Pad LUTs */
+static const u8 gpncore_gpio_to_pad[GPNCORE_COUNT] =
+ { 25, 24, 23, 32, 33, 34, 36, 37, 35, 22,
+ 20, 21, 18, 38, 39, 1, 4, 8, 17, 0,
+ 3, 6, 16, 19, 2, 5, 9 };
+
+static const u8 gpscore_gpio_to_pad[GPSCORE_COUNT] =
+ { 85, 89, 93, 96, 99, 102, 98, 101, 34, 37,
+ 36, 38, 39, 35, 40, 84, 62, 61, 64, 59,
+ 54, 56, 60, 55, 63, 57, 51, 50, 53, 47,
+ 52, 49, 48, 43, 46, 41, 45, 42, 58, 44,
+ 95, 105, 70, 68, 67, 66, 69, 71, 65, 72,
+ 86, 90, 88, 92, 103, 77, 79, 83, 78, 81,
+ 80, 82, 13, 12, 15, 14, 17, 18, 19, 16,
+ 2, 1, 0, 4, 6, 7, 9, 8, 33, 32,
+ 31, 30, 29, 27, 25, 28, 26, 23, 21, 20,
+ 24, 22, 5, 3, 10, 11, 106, 87, 91, 104,
+ 97, 100 };
+
+static const u8 gpssus_gpio_to_pad[GPSSUS_COUNT] =
+ { 29, 33, 30, 31, 32, 34, 36, 35, 38, 37,
+ 18, 7, 11, 20, 17, 1, 8, 10, 19, 12,
+ 0, 2, 23, 39, 28, 27, 22, 21, 24, 25,
+ 26, 51, 56, 54, 49, 55, 48, 47, 50, 58,
+ 52, 53, 59, 40 };
+
+/* GPIO bank descriptions */
+static const struct gpio_bank gpncore_bank = {
+ .gpio_count = GPNCORE_COUNT,
+ .gpio_to_pad = gpncore_gpio_to_pad,
+ .legacy_base = GP_LEGACY_BASE_NONE,
+ .pad_base = GPNCORE_PAD_BASE,
+ .has_wake_en = 0,
+};
+
+static const struct gpio_bank gpscore_bank = {
+ .gpio_count = GPSCORE_COUNT,
+ .gpio_to_pad = gpscore_gpio_to_pad,
+ .legacy_base = GPSCORE_LEGACY_BASE,
+ .pad_base = GPSCORE_PAD_BASE,
+ .has_wake_en = 0,
+};
+
+static const struct gpio_bank gpssus_bank = {
+ .gpio_count = GPSSUS_COUNT,
+ .gpio_to_pad = gpssus_gpio_to_pad,
+ .legacy_base = GPSSUS_LEGACY_BASE,
+ .pad_base = GPSSUS_PAD_BASE,
+ .has_wake_en = 1,
+};
+
+static void setup_gpios(const struct soc_gpio_map *gpios,
+ const struct gpio_bank *bank)
+{
+ const struct soc_gpio_map *config;
+ int gpio = 0;
+ u32 reg;
+ u8 set, bit;
+
+ u32 use_sel[4] = {0};
+ u32 io_sel[4] = {0};
+ u32 gp_lvl[4] = {0};
+ u32 tpe[4] = {0};
+ u32 tne[4] = {0};
+ u32 wake_en[4] = {0};
+
+ if (!gpios)
+ return;
+
+ for (config = gpios; config->pad_conf0 != GPIO_LIST_END;
+ config++, gpio++) {
+ if (gpio > bank->gpio_count)
+ break;
+
+ set = gpio >> 5;
+ bit = gpio % 32;
+
+ if (bank->legacy_base != GP_LEGACY_BASE_NONE) {
+ /* Legacy IO configuration */
+ use_sel[set] |= config->use_sel << bit;
+ io_sel[set] |= config->io_sel << bit;
+ gp_lvl[set] |= config->gp_lvl << bit;
+ tpe[set] |= config->tpe << bit;
+ tne[set] |= config->tne << bit;
+
+ /* Some banks do not have wake_en ability */
+ if (bank->has_wake_en)
+ wake_en[set] |= config->wake_en << bit;
+ }
+
+ /* Pad configuration registers */
+ reg = bank->pad_base + 16 * bank->gpio_to_pad[gpio];
+
+#ifdef GPIO_DEBUG
+ printk(BIOS_DEBUG, "Write Pad: Base(%x) - %x %x %x\n",
+ reg, config->pad_conf0, config->pad_conf1,
+ config->pad_val );
+#endif
+
+ write32(reg + PAD_CONF0_REG, config->pad_conf0);
+ write32(reg + PAD_CONF1_REG, config->pad_conf1);
+ write32(reg + PAD_VAL_REG, config->pad_val);
+ }
+
+ if (bank->legacy_base != GP_LEGACY_BASE_NONE)
+ for (set = 0; set <= (bank->gpio_count - 1) / 32; ++set) {
+ reg = bank->legacy_base + 0x20 * set;
+
+#ifdef GPIO_DEBUG
+ printk(BIOS_DEBUG,
+ "Write GPIO: Reg(%x) - %x %x %x %x %x\n",
+ reg, use_sel[set], io_sel[set], gp_lvl[set],
+ tpe[set], tne[set]);
+#endif
+
+ outl(use_sel[set], reg + LEGACY_USE_SEL_REG);
+ outl(io_sel[set], reg + LEGACY_IO_SEL_REG);
+ outl(gp_lvl[set], reg + LEGACY_GP_LVL_REG);
+ outl(tpe[set], reg + LEGACY_TPE_REG);
+ outl(tne[set], reg + LEGACY_TNE_REG);
+
+ /* TS registers are WOC */
+ outl(0, reg + LEGACY_TS_REG);
+
+ if (bank->has_wake_en)
+ outl(wake_en[set], reg + LEGACY_WAKE_EN_REG);
+ }
+}
+
+void setup_soc_gpios(struct soc_gpio_config *config)
+{
+ if (config) {
+ setup_gpios(config->ncore, &gpncore_bank);
+ setup_gpios(config->score, &gpscore_bank);
+ setup_gpios(config->ssus, &gpssus_bank);
+ }
+}
+
+struct soc_gpio_config* __attribute__((weak)) mainboard_get_gpios(void)
+{
+ printk(BIOS_DEBUG, "Default/empty GPIO config\n");
+ return NULL;
+}
diff --git a/src/soc/intel/baytrail/ramstage.c b/src/soc/intel/baytrail/ramstage.c
index e30fc89bc2..10c030fcb3 100644
--- a/src/soc/intel/baytrail/ramstage.c
+++ b/src/soc/intel/baytrail/ramstage.c
@@ -31,6 +31,7 @@
#include <baytrail/msr.h>
#include <baytrail/pci_devs.h>
#include <baytrail/ramstage.h>
+#include <baytrail/gpio.h>
/* Global PATTRS */
DEFINE_PATTRS;
@@ -101,7 +102,14 @@ static void fill_in_pattrs(void)
fill_in_msr(&attrs->iacore_vids, MSR_IACORE_VIDS);
}
+
void baytrail_init_pre_device(void)
{
+ struct soc_gpio_config *config;
+
fill_in_pattrs();
+
+ /* Get GPIO initial states from mainboard */
+ config = mainboard_get_gpios();
+ setup_soc_gpios(config);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 20:39:37 +0000