diff options
Diffstat (limited to 'src/lib/reg_script.c')
| -rw-r--r-- | src/lib/reg_script.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/src/lib/reg_script.c b/src/lib/reg_script.c new file mode 100644 index 0000000000..252aa12651 --- /dev/null +++ b/src/lib/reg_script.c @@ -0,0 +1,418 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 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 <arch/io.h> +#include <console/console.h> +#include <delay.h> +#include <device/device.h> +#include <device/resource.h> +#include <device/pci.h> +#include <stdint.h> +#include <reg_script.h> + +#if CONFIG_SOC_INTEL_BAYTRAIL +#include <baytrail/iosf.h> +#endif + +#define POLL_DELAY 100 /* 100us */ +#if defined(__PRE_RAM__) +#define EMPTY_DEV 0 +#else +#define EMPTY_DEV NULL +#endif + +struct reg_script_context { + device_t dev; + struct resource *res; + const struct reg_script *step; +}; + +static inline void reg_script_set_dev(struct reg_script_context *ctx, + device_t dev) +{ + ctx->dev = dev; + ctx->res = NULL; +} + +static inline void reg_script_set_step(struct reg_script_context *ctx, + const struct reg_script *step) +{ + ctx->step = step; +} + +static inline const struct reg_script * +reg_script_get_step(struct reg_script_context *ctx) +{ + return ctx->step; +} + +static struct resource *reg_script_get_resource(struct reg_script_context *ctx) +{ +#if defined(__PRE_RAM__) + return NULL; +#else + struct resource *res; + const struct reg_script *step = reg_script_get_step(ctx); + + res = ctx->res; + + if (res != NULL && res->index == step->res_index) + return res; + + res = find_resource(ctx->dev, step->res_index); + ctx->res = res; + return res; +#endif +} + +static uint32_t reg_script_read_pci(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->size) { + case REG_SCRIPT_SIZE_8: + return pci_read_config8(ctx->dev, step->reg); + case REG_SCRIPT_SIZE_16: + return pci_read_config16(ctx->dev, step->reg); + case REG_SCRIPT_SIZE_32: + return pci_read_config32(ctx->dev, step->reg); + } + return 0; +} + +static void reg_script_write_pci(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->size) { + case REG_SCRIPT_SIZE_8: + pci_write_config8(ctx->dev, step->reg, step->value); + break; + case REG_SCRIPT_SIZE_16: + pci_write_config16(ctx->dev, step->reg, step->value); + break; + case REG_SCRIPT_SIZE_32: + pci_write_config32(ctx->dev, step->reg, step->value); + break; + } +} + +static uint32_t reg_script_read_io(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->size) { + case REG_SCRIPT_SIZE_8: + return inb(step->reg); + case REG_SCRIPT_SIZE_16: + return inw(step->reg); + case REG_SCRIPT_SIZE_32: + return inl(step->reg); + } + return 0; +} + +static void reg_script_write_io(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->size) { + case REG_SCRIPT_SIZE_8: + outb(step->value, step->reg); + break; + case REG_SCRIPT_SIZE_16: + outw(step->value, step->reg); + break; + case REG_SCRIPT_SIZE_32: + outl(step->value, step->reg); + break; + } +} + +static uint32_t reg_script_read_mmio(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->size) { + case REG_SCRIPT_SIZE_8: + return read8(step->reg); + case REG_SCRIPT_SIZE_16: + return read16(step->reg); + case REG_SCRIPT_SIZE_32: + return read32(step->reg); + } + return 0; +} + +static void reg_script_write_mmio(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->size) { + case REG_SCRIPT_SIZE_8: + write8(step->reg, step->value); + break; + case REG_SCRIPT_SIZE_16: + write16(step->reg, step->value); + break; + case REG_SCRIPT_SIZE_32: + write32(step->reg, step->value); + break; + } +} + +static uint32_t reg_script_read_res(struct reg_script_context *ctx) +{ + struct resource *res; + uint32_t val = 0; + const struct reg_script *step = reg_script_get_step(ctx); + + res = reg_script_get_resource(ctx); + + if (res == NULL) + return val; + + if (res->flags & IORESOURCE_IO) { + const struct reg_script io_step = { + .size = step->size, + .reg = res->base + step->reg, + }; + reg_script_set_step(ctx, &io_step); + val = reg_script_read_io(ctx); + } + else if (res->flags & IORESOURCE_MEM) { + const struct reg_script mmio_step = { + .size = step->size, + .reg = res->base + step->reg, + }; + reg_script_set_step(ctx, &mmio_step); + val = reg_script_read_mmio(ctx); + } + reg_script_set_step(ctx, step); + return val; +} + +static void reg_script_write_res(struct reg_script_context *ctx) +{ + struct resource *res; + const struct reg_script *step = reg_script_get_step(ctx); + + res = reg_script_get_resource(ctx); + + if (res == NULL) + return; + + if (res->flags & IORESOURCE_IO) { + const struct reg_script io_step = { + .size = step->size, + .reg = res->base + step->reg, + .value = step->value, + }; + reg_script_set_step(ctx, &io_step); + reg_script_write_io(ctx); + } + else if (res->flags & IORESOURCE_MEM) { + const struct reg_script mmio_step = { + .size = step->size, + .reg = res->base + step->reg, + .value = step->value, + }; + reg_script_set_step(ctx, &mmio_step); + reg_script_write_mmio(ctx); + } + reg_script_set_step(ctx, step); +} + +static uint32_t reg_script_read_iosf(struct reg_script_context *ctx) +{ +#if CONFIG_SOC_INTEL_BAYTRAIL + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->id) { + case IOSF_PORT_BUNIT: + return iosf_bunit_read(step->reg); + case IOSF_PORT_DUNIT_CH0: + return iosf_dunit_ch0_read(step->reg); + case IOSF_PORT_PMC: + return iosf_punit_read(step->reg); + case IOSF_PORT_USBPHY: + return iosf_usbphy_read(step->reg); + case IOSF_PORT_USHPHY: + return iosf_ushphy_read(step->reg); + } +#endif + return 0; +} + +static void reg_script_write_iosf(struct reg_script_context *ctx) +{ +#if CONFIG_SOC_INTEL_BAYTRAIL + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->id) { + case IOSF_PORT_BUNIT: + iosf_bunit_write(step->reg, step->value); + break; + case IOSF_PORT_DUNIT_CH0: + iosf_dunit_write(step->reg, step->value); + break; + case IOSF_PORT_PMC: + iosf_punit_write(step->reg, step->value); + break; + case IOSF_PORT_USBPHY: + iosf_usbphy_write(step->reg, step->value); + break; + case IOSF_PORT_USHPHY: + iosf_ushphy_write(step->reg, step->value); + break; + } +#endif +} + +static uint32_t reg_script_read(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->type) { + case REG_SCRIPT_TYPE_PCI: + return reg_script_read_pci(ctx); + case REG_SCRIPT_TYPE_IO: + return reg_script_read_io(ctx); + case REG_SCRIPT_TYPE_MMIO: + return reg_script_read_mmio(ctx); + case REG_SCRIPT_TYPE_RES: + return reg_script_read_res(ctx); + case REG_SCRIPT_TYPE_IOSF: + return reg_script_read_iosf(ctx); + } + return 0; +} + +static void reg_script_write(struct reg_script_context *ctx) +{ + const struct reg_script *step = reg_script_get_step(ctx); + + switch (step->type) { + case REG_SCRIPT_TYPE_PCI: + reg_script_write_pci(ctx); + break; + case REG_SCRIPT_TYPE_IO: + reg_script_write_io(ctx); + break; + case REG_SCRIPT_TYPE_MMIO: + reg_script_write_mmio(ctx); + break; + case REG_SCRIPT_TYPE_RES: + reg_script_write_res(ctx); + break; + case REG_SCRIPT_TYPE_IOSF: + reg_script_write_iosf(ctx); + break; + } +} + +static void reg_script_rmw(struct reg_script_context *ctx) +{ + uint32_t value; + const struct reg_script *step = reg_script_get_step(ctx); + struct reg_script write_step = *step; + + value = reg_script_read(ctx); + value &= step->mask; + value |= step->value; + write_step.value = value; + reg_script_set_step(ctx, &write_step); + reg_script_write(ctx); + reg_script_set_step(ctx, step); +} + +/* In order to easily chain scripts together handle the REG_SCRIPT_COMMAND_NEXT + * as recursive call with a new context that has the same dev and resource + * as the previous one. That will run to completion and then move on to the + * next step of the previous context. */ +static void reg_script_run_next(struct reg_script_context *ctx, + const struct reg_script *step); + +static void reg_script_run_with_context(struct reg_script_context *ctx) +{ + uint32_t value = 0, try; + + while (1) { + const struct reg_script *step = reg_script_get_step(ctx); + + if (step->command == REG_SCRIPT_COMMAND_END) + break; + + switch (step->command) { + case REG_SCRIPT_COMMAND_READ: + (void)reg_script_read(ctx); + break; + case REG_SCRIPT_COMMAND_WRITE: + reg_script_write(ctx); + break; + case REG_SCRIPT_COMMAND_RMW: + reg_script_rmw(ctx); + break; + case REG_SCRIPT_COMMAND_POLL: + for (try = 0; try < step->timeout; try += POLL_DELAY) { + value = reg_script_read(ctx) & step->mask; + if (value == step->value) + break; + udelay(POLL_DELAY); + } + if (try >= step->timeout) + printk(BIOS_WARNING, "%s: POLL timeout waiting " + "for 0x%08x to be 0x%08x, got 0x%08x\n", + __func__, step->reg, step->value, value); + break; + case REG_SCRIPT_COMMAND_SET_DEV: + reg_script_set_dev(ctx, step->dev); + break; + case REG_SCRIPT_COMMAND_NEXT: + reg_script_run_next(ctx, step->next); + break; + default: + printk(BIOS_WARNING, "Invalid command: %08x\n", + step->command); + break; + } + + reg_script_set_step(ctx, step + 1); + } +} + +static void reg_script_run_next(struct reg_script_context *prev_ctx, + const struct reg_script *step) +{ + struct reg_script_context ctx; + + /* Use prev context as a basis but start at a new step. */ + ctx = *prev_ctx; + reg_script_set_step(&ctx, step); + reg_script_run_with_context(&ctx); +} + +void reg_script_run(const struct reg_script *step) +{ + struct reg_script_context ctx; + + reg_script_set_dev(&ctx, EMPTY_DEV); + reg_script_set_step(&ctx, step); + reg_script_run_with_context(&ctx); +} |