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-rw-r--r--arch/x86/cpu/broadwell/Makefile1
-rw-r--r--arch/x86/cpu/broadwell/pinctrl_broadwell.c278
2 files changed, 279 insertions, 0 deletions
diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile
index 128829a007..db60e308c7 100644
--- a/arch/x86/cpu/broadwell/Makefile
+++ b/arch/x86/cpu/broadwell/Makefile
@@ -7,3 +7,4 @@
obj-y += cpu.o
obj-y += iobp.o
obj-y += pch.o
+obj-y += pinctrl_broadwell.o
diff --git a/arch/x86/cpu/broadwell/pinctrl_broadwell.c b/arch/x86/cpu/broadwell/pinctrl_broadwell.c
new file mode 100644
index 0000000000..2a3fcedd0d
--- /dev/null
+++ b/arch/x86/cpu/broadwell/pinctrl_broadwell.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright (C) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <pch.h>
+#include <pci.h>
+#include <asm/cpu.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/arch/gpio.h>
+#include <dt-bindings/gpio/x86-gpio.h>
+#include <dm/pinctrl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum {
+ MAX_GPIOS = 95,
+};
+
+#define PIRQ_SHIFT 16
+#define CONF_MASK 0xffff
+
+struct pin_info {
+ int node;
+ int phandle;
+ bool mode_gpio;
+ bool dir_input;
+ bool invert;
+ bool trigger_level;
+ bool output_high;
+ bool sense_disable;
+ bool owner_gpio;
+ bool route_smi;
+ bool irq_enable;
+ bool reset_rsmrst;
+ bool pirq_apic_route;
+};
+
+static int broadwell_pinctrl_read_configs(struct udevice *dev,
+ struct pin_info *conf, int max_pins)
+{
+ const void *blob = gd->fdt_blob;
+ int count = 0;
+ int node;
+
+ debug("%s: starting\n", __func__);
+ for (node = fdt_first_subnode(blob, dev->of_offset);
+ node > 0;
+ node = fdt_next_subnode(blob, node)) {
+ int phandle = fdt_get_phandle(blob, node);
+
+ if (!phandle)
+ continue;
+ if (count == max_pins)
+ return -ENOSPC;
+
+ /* We've found a new configuration */
+ memset(conf, '\0', sizeof(*conf));
+ conf->node = node;
+ conf->phandle = phandle;
+ conf->mode_gpio = fdtdec_get_bool(blob, node, "mode-gpio");
+ if (fdtdec_get_int(blob, node, "direction", -1) == PIN_INPUT)
+ conf->dir_input = true;
+ conf->invert = fdtdec_get_bool(blob, node, "invert");
+ if (fdtdec_get_int(blob, node, "trigger", -1) == TRIGGER_LEVEL)
+ conf->trigger_level = true;
+ if (fdtdec_get_int(blob, node, "output-value", -1) == 1)
+ conf->output_high = true;
+ conf->sense_disable = fdtdec_get_bool(blob, node,
+ "sense-disable");
+ if (fdtdec_get_int(blob, node, "owner", -1) == OWNER_GPIO)
+ conf->owner_gpio = true;
+ if (fdtdec_get_int(blob, node, "route", -1) == ROUTE_SMI)
+ conf->route_smi = true;
+ conf->irq_enable = fdtdec_get_bool(blob, node, "irq-enable");
+ conf->reset_rsmrst = fdtdec_get_bool(blob, node,
+ "reset-rsmrst");
+ if (fdtdec_get_int(blob, node, "pirq-apic", -1) ==
+ PIRQ_APIC_ROUTE)
+ conf->pirq_apic_route = true;
+ debug("config: phandle=%d\n", phandle);
+ count++;
+ conf++;
+ }
+ debug("%s: Found %d configurations\n", __func__, count);
+
+ return count;
+}
+
+static int broadwell_pinctrl_lookup_phandle(struct pin_info *conf,
+ int conf_count, int phandle)
+{
+ int i;
+
+ for (i = 0; i < conf_count; i++) {
+ if (conf[i].phandle == phandle)
+ return i;
+ }
+
+ return -ENOENT;
+}
+
+static int broadwell_pinctrl_read_pins(struct udevice *dev,
+ struct pin_info *conf, int conf_count, int gpio_conf[],
+ int num_gpios)
+{
+ const void *blob = gd->fdt_blob;
+ int count = 0;
+ int node;
+
+ for (node = fdt_first_subnode(blob, dev->of_offset);
+ node > 0;
+ node = fdt_next_subnode(blob, node)) {
+ int len, i;
+ const u32 *prop = fdt_getprop(blob, node, "config", &len);
+
+ if (!prop)
+ continue;
+
+ /* There are three cells per pin */
+ count = len / (sizeof(u32) * 3);
+ debug("Found %d GPIOs to configure\n", count);
+ for (i = 0; i < count; i++) {
+ uint gpio = fdt32_to_cpu(prop[i * 3]);
+ uint phandle = fdt32_to_cpu(prop[i * 3 + 1]);
+ int val;
+
+ if (gpio >= num_gpios) {
+ debug("%s: GPIO %d out of range\n", __func__,
+ gpio);
+ return -EDOM;
+ }
+ val = broadwell_pinctrl_lookup_phandle(conf, conf_count,
+ phandle);
+ if (val < 0) {
+ debug("%s: Cannot find phandle %d\n", __func__,
+ phandle);
+ return -EINVAL;
+ }
+ gpio_conf[gpio] = val |
+ fdt32_to_cpu(prop[i * 3 + 2]) << PIRQ_SHIFT;
+ }
+ }
+
+ return 0;
+}
+
+static void broadwell_pinctrl_commit(struct pch_lp_gpio_regs *regs,
+ struct pin_info *pin_info,
+ int gpio_conf[], int count)
+{
+ u32 owner_gpio[GPIO_BANKS] = {0};
+ u32 route_smi[GPIO_BANKS] = {0};
+ u32 irq_enable[GPIO_BANKS] = {0};
+ u32 reset_rsmrst[GPIO_BANKS] = {0};
+ u32 pirq2apic = 0;
+ int set, bit, gpio = 0;
+
+ for (gpio = 0; gpio < MAX_GPIOS; gpio++) {
+ int confnum = gpio_conf[gpio] & CONF_MASK;
+ struct pin_info *pin = &pin_info[confnum];
+ u32 val;
+
+ val = pin->mode_gpio << CONFA_MODE_SHIFT |
+ pin->dir_input << CONFA_DIR_SHIFT |
+ pin->invert << CONFA_INVERT_SHIFT |
+ pin->trigger_level << CONFA_TRIGGER_SHIFT |
+ pin->output_high << CONFA_OUTPUT_SHIFT;
+ outl(val, &regs->config[gpio].conf_a);
+ outl(pin->sense_disable << CONFB_SENSE_SHIFT,
+ &regs->config[gpio].conf_b);
+
+ /* Determine set and bit based on GPIO number */
+ set = gpio / GPIO_PER_BANK;
+ bit = gpio % GPIO_PER_BANK;
+
+ /* Apply settings to set specific bits */
+ owner_gpio[set] |= pin->owner_gpio << bit;
+ route_smi[set] |= pin->route_smi << bit;
+ irq_enable[set] |= pin->irq_enable << bit;
+ reset_rsmrst[set] |= pin->reset_rsmrst << bit;
+
+ /* PIRQ to IO-APIC map */
+ if (pin->pirq_apic_route)
+ pirq2apic |= gpio_conf[gpio] >> PIRQ_SHIFT;
+ debug("gpio %d: conf %d, mode_gpio %d, dir_input %d, output_high %d\n",
+ gpio, confnum, pin->mode_gpio, pin->dir_input,
+ pin->output_high);
+ }
+
+ for (set = 0; set < GPIO_BANKS; set++) {
+ outl(owner_gpio[set], &regs->own[set]);
+ outl(route_smi[set], &regs->gpi_route[set]);
+ outl(irq_enable[set], &regs->gpi_ie[set]);
+ outl(reset_rsmrst[set], &regs->rst_sel[set]);
+ }
+
+ outl(pirq2apic, &regs->pirq_to_ioxapic);
+}
+
+static int broadwell_pinctrl_probe(struct udevice *dev)
+{
+ struct pch_lp_gpio_regs *regs;
+ struct pin_info conf[12];
+ int gpio_conf[MAX_GPIOS];
+ struct udevice *pch;
+ int conf_count;
+ u32 gpiobase;
+ int ret;
+
+ ret = uclass_first_device(UCLASS_PCH, &pch);
+ if (ret)
+ return ret;
+ if (!pch)
+ return -ENODEV;
+ debug("%s: start\n", __func__);
+
+ /* Only init once, before relocation */
+ if (gd->flags & GD_FLG_RELOC)
+ return 0;
+
+ /*
+ * Get the memory/io base address to configure every pins.
+ * IOBASE is used to configure the mode/pads
+ * GPIOBASE is used to configure the direction and default value
+ */
+ ret = pch_get_gpio_base(pch, &gpiobase);
+ if (ret) {
+ debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
+ gpiobase);
+ return -EINVAL;
+ }
+
+ conf_count = broadwell_pinctrl_read_configs(dev, conf,
+ ARRAY_SIZE(conf));
+ if (conf_count < 0) {
+ debug("%s: Cannot read configs: err=%d\n", __func__, ret);
+ return conf_count;
+ }
+
+ /*
+ * Assume that pin settings are provided for every pin. Pins not
+ * mentioned will get the first config mentioned in the list.
+ */
+ ret = broadwell_pinctrl_read_pins(dev, conf, conf_count, gpio_conf,
+ MAX_GPIOS);
+ if (ret) {
+ debug("%s: Cannot read pin settings: err=%d\n", __func__, ret);
+ return ret;
+ }
+
+ regs = (struct pch_lp_gpio_regs *)gpiobase;
+ broadwell_pinctrl_commit(regs, conf, gpio_conf, ARRAY_SIZE(conf));
+
+ debug("%s: done\n", __func__);
+
+ return 0;
+}
+
+static const struct udevice_id broadwell_pinctrl_match[] = {
+ { .compatible = "intel,x86-broadwell-pinctrl",
+ .data = X86_SYSCON_PINCONF },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(broadwell_pinctrl) = {
+ .name = "broadwell_pinctrl",
+ .id = UCLASS_SYSCON,
+ .of_match = broadwell_pinctrl_match,
+ .probe = broadwell_pinctrl_probe,
+};
generated by cgit (git 2.34.1) at 2024-12-25 18:01:35 +0000