diff options
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/apollolake/Makefile.inc | 6 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/bootblock/bootblock.c | 3 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/chip.c | 15 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/flash_ctrlr.c | 390 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/include/soc/flash_ctrlr.h (renamed from src/soc/intel/apollolake/include/soc/spi.h) | 6 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/mmap_boot.c | 4 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/romstage.c | 10 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/spi.c | 405 |
8 files changed, 436 insertions, 403 deletions
diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc index 24b5035bed..d058ddbbba 100644 --- a/src/soc/intel/apollolake/Makefile.inc +++ b/src/soc/intel/apollolake/Makefile.inc @@ -12,6 +12,7 @@ bootblock-y += bootblock/bootblock.c bootblock-y += bootblock/cache_as_ram.S bootblock-y += bootblock/bootblock.c bootblock-y += car.c +bootblock-y += flash_ctrlr.c bootblock-y += gpio.c bootblock-y += heci.c bootblock-y += itss.c @@ -24,6 +25,7 @@ bootblock-$(CONFIG_SOC_UART_DEBUG) += uart_early.c romstage-y += car.c romstage-$(CONFIG_PLATFORM_USES_FSP2_0) += romstage.c +romstage-y += flash_ctrlr.c romstage-y += gpio.c romstage-y += heci.c romstage-y += i2c_early.c @@ -38,6 +40,7 @@ romstage-y += pmutil.c romstage-y += reset.c romstage-y += spi.c +smm-y += flash_ctrlr.c smm-y += mmap_boot.c smm-y += pmutil.c smm-y += gpio.c @@ -50,6 +53,7 @@ ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c ramstage-y += cpu.c ramstage-y += chip.c ramstage-y += elog.c +ramstage-y += flash_ctrlr.c ramstage-y += dsp.c ramstage-y += gpio.c ramstage-y += graphics.c @@ -76,6 +80,7 @@ ramstage-y += spi.c ramstage-y += xhci.c postcar-y += exit_car.S +postcar-y += flash_ctrlr.c postcar-y += memmap.c postcar-y += mmap_boot.c postcar-y += spi.c @@ -83,6 +88,7 @@ postcar-$(CONFIG_SOC_UART_DEBUG) += uart_early.c postcar-y += tsc_freq.c verstage-y += car.c +verstage-y += flash_ctrlr.c verstage-y += i2c_early.c verstage-y += heci.c verstage-y += memmap.c diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c index be10a22736..1f5055d6a3 100644 --- a/src/soc/intel/apollolake/bootblock/bootblock.c +++ b/src/soc/intel/apollolake/bootblock/bootblock.c @@ -21,6 +21,7 @@ #include <lib.h> #include <soc/iomap.h> #include <soc/cpu.h> +#include <soc/flash_ctrlr.h> #include <soc/gpio.h> #include <soc/iosf.h> #include <soc/mmap_boot.h> @@ -129,7 +130,7 @@ static void enable_spibar(void) pci_write_config8(dev, PCI_COMMAND, val); /* Initialize SPI to allow BIOS to write/erase on flash. */ - spi_init(); + spi_flash_init(); } static void enable_pmcbar(void) diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c index 32d68cc9ad..d481f3e891 100644 --- a/src/soc/intel/apollolake/chip.c +++ b/src/soc/intel/apollolake/chip.c @@ -28,6 +28,7 @@ #include <romstage_handoff.h> #include <soc/iomap.h> #include <soc/cpu.h> +#include <soc/flash_ctrlr.h> #include <soc/intel/common/vbt.h> #include <soc/itss.h> #include <soc/nvs.h> @@ -497,14 +498,14 @@ void platform_fsp_notify_status(enum fsp_notify_phase phase) } /* - * spi_init() needs to run unconditionally on every boot (including resume) to - * allow write protect to be disabled for eventlog and nvram updates. This needs - * to be done as early as possible in ramstage. Thus, add a callback for entry - * into BS_PRE_DEVICE. + * spi_flash init() needs to run unconditionally on every boot (including + * resume) to allow write protect to be disabled for eventlog and nvram + * updates. This needs to be done as early as possible in ramstage. Thus, add a + * callback for entry into BS_PRE_DEVICE. */ -static void spi_init_cb(void *unused) +static void spi_flash_init_cb(void *unused) { - spi_init(); + spi_flash_init(); } -BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, spi_init_cb, NULL); +BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, spi_flash_init_cb, NULL); diff --git a/src/soc/intel/apollolake/flash_ctrlr.c b/src/soc/intel/apollolake/flash_ctrlr.c new file mode 100644 index 0000000000..a608ca700c --- /dev/null +++ b/src/soc/intel/apollolake/flash_ctrlr.c @@ -0,0 +1,390 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2016 Intel Corp. + * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for 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; 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. + */ + +#define __SIMPLE_DEVICE__ + +#include <arch/early_variables.h> +#include <arch/io.h> +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <soc/flash_ctrlr.h> +#include <soc/intel/common/spi_flash.h> +#include <soc/pci_devs.h> +#include <spi_flash.h> +#include <spi-generic.h> +#include <stdlib.h> +#include <string.h> + +/* Helper to create a SPI context on API entry. */ +#define BOILERPLATE_CREATE_CTX(ctx) \ + struct spi_flash_ctx real_ctx; \ + struct spi_flash_ctx *ctx = &real_ctx; \ + _get_spi_flash_ctx(ctx) + +/* + * Anything that's not success is <0. Provided solely for readability, as these + * constants are not used outside this file. + */ +enum errors { + SUCCESS = 0, + E_NOT_IMPLEMENTED = -1, + E_TIMEOUT = -2, + E_HW_ERROR = -3, + E_ARGUMENT = -4, +}; + +/* Reduce data-passing burden by grouping transaction data in a context. */ +struct spi_flash_ctx { + uintptr_t mmio_base; + device_t pci_dev; + uint32_t hsfsts_on_last_error; +}; + +static void _get_spi_flash_ctx(struct spi_flash_ctx *ctx) +{ + uint32_t bar; + + /* FIXME: use device definition */ + ctx->pci_dev = SPI_DEV; + + bar = pci_read_config32(ctx->pci_dev, PCI_BASE_ADDRESS_0); + ctx->mmio_base = bar & ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; + ctx->hsfsts_on_last_error = 0; +} + +/* Read register from the SPI flash controller. 'reg' is the register offset. */ +static uint32_t _spi_flash_ctrlr_reg_read(struct spi_flash_ctx *ctx, uint16_t reg) +{ + uintptr_t addr = ALIGN_DOWN(ctx->mmio_base + reg, 4); + return read32((void *)addr); +} + +uint32_t spi_flash_ctrlr_reg_read(uint16_t reg) +{ + BOILERPLATE_CREATE_CTX(ctx); + return _spi_flash_ctrlr_reg_read(ctx, reg); +} + +/* Write to register in SPI flash controller. 'reg' is the register offset. */ +static void _spi_flash_ctrlr_reg_write(struct spi_flash_ctx *ctx, uint16_t reg, + uint32_t val) +{ + uintptr_t addr = ALIGN_DOWN(ctx->mmio_base + reg, 4); + write32((void *)addr, val); + +} + +/* + * The hardware datasheet is not clear on what HORD values actually do. It + * seems that HORD_SFDP provides access to the first 8 bytes of the SFDP, which + * is the signature and revision fields. HORD_JEDEC provides access to the + * actual flash parameters, and is most likely what you want to use when + * probing the flash from software. + * It's okay to rely on SFPD, since the SPI flash controller requires an SFDP + * 1.5 or newer compliant SPI flash chip. + * NOTE: Due to the register layout of the hardware, all accesses will be + * aligned to a 4 byte boundary. + */ +static uint32_t read_spi_flash_sfdp_param(struct spi_flash_ctx *ctx, + uint16_t sfdp_reg) +{ + uint32_t ptinx_index = sfdp_reg & SPIBAR_PTINX_IDX_MASK; + _spi_flash_ctrlr_reg_write(ctx, SPIBAR_PTINX, + ptinx_index | SPIBAR_PTINX_HORD_JEDEC); + return _spi_flash_ctrlr_reg_read(ctx, SPIBAR_PTDATA); +} + +/* Fill FDATAn FIFO in preparation for a write transaction. */ +static void fill_xfer_fifo(struct spi_flash_ctx *ctx, const void *data, + size_t len) +{ + len = min(len, SPIBAR_FDATA_FIFO_SIZE); + + /* YES! memcpy() works. FDATAn does not require 32-bit accesses. */ + memcpy((void*)(ctx->mmio_base + SPIBAR_FDATA(0)), data, len); +} + +/* Drain FDATAn FIFO after a read transaction populates data. */ +static void drain_xfer_fifo(struct spi_flash_ctx *ctx, void *dest, size_t len) +{ + len = min(len, SPIBAR_FDATA_FIFO_SIZE); + + /* YES! memcpy() works. FDATAn does not require 32-bit accesses. */ + memcpy(dest, (void*)(ctx->mmio_base + SPIBAR_FDATA(0)), len); +} + +/* Fire up a transfer using the hardware sequencer. */ +static void start_hwseq_xfer(struct spi_flash_ctx *ctx, uint32_t hsfsts_cycle, + uint32_t flash_addr, size_t len) +{ + /* Make sure all W1C status bits get cleared. */ + uint32_t hsfsts = SPIBAR_HSFSTS_W1C_BITS; + /* Set up transaction parameters. */ + hsfsts |= hsfsts_cycle & SPIBAR_HSFSTS_FCYCLE_MASK; + hsfsts |= SPIBAR_HSFSTS_FBDC(len - 1); + + _spi_flash_ctrlr_reg_write(ctx, SPIBAR_FADDR, flash_addr); + _spi_flash_ctrlr_reg_write(ctx, SPIBAR_HSFSTS_CTL, + hsfsts | SPIBAR_HSFSTS_FGO); +} + +static void print_xfer_error(struct spi_flash_ctx *ctx, + const char *failure_reason, uint32_t flash_addr) +{ + printk(BIOS_ERR, "SPI Transaction %s at flash offset %x.\n" + "\tHSFSTS = 0x%08x\n", + failure_reason, flash_addr, ctx->hsfsts_on_last_error); +} + +static int wait_for_hwseq_xfer(struct spi_flash_ctx *ctx) +{ + uint32_t hsfsts; + do { + hsfsts = _spi_flash_ctrlr_reg_read(ctx, SPIBAR_HSFSTS_CTL); + + if (hsfsts & SPIBAR_HSFSTS_FCERR) { + ctx->hsfsts_on_last_error = hsfsts; + return E_HW_ERROR; + } + /* TODO: set up timer and abort on timeout */ + } while (!(hsfsts & SPIBAR_HSFSTS_FDONE)); + + return SUCCESS; +} + +/* Execute SPI flash transfer. This is a blocking call. */ +static int exec_sync_hwseq_xfer(struct spi_flash_ctx *ctx, + uint32_t hsfsts_cycle, uint32_t flash_addr, + size_t len) +{ + int ret; + start_hwseq_xfer(ctx, hsfsts_cycle, flash_addr, len); + ret = wait_for_hwseq_xfer(ctx); + if (ret != SUCCESS) { + const char *reason = (ret == E_TIMEOUT) ? "timeout" : "error"; + print_xfer_error(ctx, reason, flash_addr); + } + return ret; +} + +unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return MIN(buf_len, SPIBAR_FDATA_FIFO_SIZE); +} + +/* + * Write-protection status for BIOS region (BIOS_CONTROL register): + * EISS/WPD bits 00 01 10 11 + * -- -- -- -- + * normal mode RO RW RO RO + * SMM mode RO RW RO RW + */ +void spi_flash_init(void) +{ + uint32_t bios_ctl; + + BOILERPLATE_CREATE_CTX(ctx); + + bios_ctl = pci_read_config32(ctx->pci_dev, SPIBAR_BIOS_CONTROL); + bios_ctl |= SPIBAR_BIOS_CONTROL_WPD; + bios_ctl &= ~SPIBAR_BIOS_CONTROL_EISS; + + /* Enable Prefetching and caching. */ + bios_ctl |= SPIBAR_BIOS_CONTROL_PREFETCH_ENABLE; + bios_ctl &= ~SPIBAR_BIOS_CONTROL_CACHE_DISABLE; + + pci_write_config32(ctx->pci_dev, SPIBAR_BIOS_CONTROL, bios_ctl); +} + +/* Flash device operations. */ +static struct spi_flash boot_flash CAR_GLOBAL; + +static int nuclear_spi_flash_erase(const struct spi_flash *flash, + uint32_t offset, size_t len) +{ + int ret; + size_t erase_size; + uint32_t erase_cycle; + + BOILERPLATE_CREATE_CTX(ctx); + + if (!IS_ALIGNED(offset, 4 * KiB) || !IS_ALIGNED(len, 4 * KiB)) { + printk(BIOS_ERR, "BUG! SPI erase region not sector aligned.\n"); + return E_ARGUMENT; + } + + while (len) { + if (IS_ALIGNED(offset, 64 * KiB) && (len >= 64 * KiB)) { + erase_size = 64 * KiB; + erase_cycle = SPIBAR_HSFSTS_CYCLE_64K_ERASE; + } else { + erase_size = 4 * KiB; + erase_cycle = SPIBAR_HSFSTS_CYCLE_4K_ERASE; + } + printk(BIOS_SPEW, "Erasing flash addr %x + %zu KiB\n", + offset, erase_size / KiB); + + ret = exec_sync_hwseq_xfer(ctx, erase_cycle, offset, 0); + if (ret != SUCCESS) + return ret; + + offset += erase_size; + len -= erase_size; + } + + return SUCCESS; +} + +/* + * Ensure read/write xfer len is not greater than SPIBAR_FDATA_FIFO_SIZE and + * that the operation does not cross 256-byte boundary. + */ +static size_t get_xfer_len(uint32_t addr, size_t len) +{ + size_t xfer_len = min(len, SPIBAR_FDATA_FIFO_SIZE); + size_t bytes_left = ALIGN_UP(addr, 256) - addr; + + if (bytes_left) + xfer_len = min(xfer_len, bytes_left); + + return xfer_len; +} + +static int nuclear_spi_flash_read(const struct spi_flash *flash, uint32_t addr, + size_t len, void *buf) +{ + int ret; + size_t xfer_len; + uint8_t *data = buf; + + BOILERPLATE_CREATE_CTX(ctx); + + while (len) { + xfer_len = get_xfer_len(addr, len); + + ret = exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_READ, + addr, xfer_len); + if (ret != SUCCESS) + return ret; + + drain_xfer_fifo(ctx, data, xfer_len); + + addr += xfer_len; + data += xfer_len; + len -= xfer_len; + } + + return SUCCESS; +} + +static int nuclear_spi_flash_write(const struct spi_flash *flash, uint32_t addr, + size_t len, const void *buf) +{ + int ret; + size_t xfer_len; + const uint8_t *data = buf; + + BOILERPLATE_CREATE_CTX(ctx); + + while (len) { + xfer_len = get_xfer_len(addr, len); + fill_xfer_fifo(ctx, data, xfer_len); + + ret = exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_WRITE, + addr, xfer_len); + if (ret != SUCCESS) + return ret; + + addr += xfer_len; + data += xfer_len; + len -= xfer_len; + } + + return SUCCESS; +} + +static int nuclear_spi_flash_status(const struct spi_flash *flash, uint8_t *reg) +{ + int ret; + BOILERPLATE_CREATE_CTX(ctx); + + ret = exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_RD_STATUS, 0, + sizeof(*reg)); + if (ret != SUCCESS) + return ret; + + drain_xfer_fifo(ctx, reg, sizeof(*reg)); + return ret; +} + +/* + * We can't use FDOC and FDOD to read FLCOMP, as previous platforms did. + * For details see: + * Ch 31, SPI: p. 194 + * The size of the flash component is always taken from density field in the + * SFDP table. FLCOMP.C0DEN is no longer used by the Flash Controller. + */ +struct spi_flash *spi_flash_programmer_probe(struct spi_slave *dev, int force) +{ + BOILERPLATE_CREATE_CTX(ctx); + struct spi_flash *flash; + uint32_t flash_bits; + + flash = car_get_var_ptr(&boot_flash); + + /* + * bytes = (bits + 1) / 8; + * But we need to do the addition in a way which doesn't overflow for + * 4 Gbit devices (flash_bits == 0xffffffff). + */ + /* FIXME: Don't hardcode 0x04 ? */ + flash_bits = read_spi_flash_sfdp_param(ctx, 0x04); + flash->size = (flash_bits >> 3) + 1; + + memcpy(&flash->spi, dev, sizeof(*dev)); + flash->name = "Apollolake hardware sequencer"; + + /* Can erase both 4 KiB and 64 KiB chunks. Declare the smaller size. */ + flash->sector_size = 4 * KiB; + /* + * FIXME: Get erase+cmd, and status_cmd from SFDP. + * + * flash->erase_cmd = ??? + * flash->status_cmd = ??? + */ + + flash->internal_write = nuclear_spi_flash_write; + flash->internal_erase = nuclear_spi_flash_erase; + flash->internal_read = nuclear_spi_flash_read; + flash->internal_status = nuclear_spi_flash_status; + + return flash; +} + +int spi_flash_get_fpr_info(struct fpr_info *info) +{ + BOILERPLATE_CREATE_CTX(ctx); + + if (!ctx->mmio_base) + return -1; + + info->base = ctx->mmio_base + SPIBAR_FPR_BASE; + info->max = SPIBAR_FPR_MAX; + + return 0; +} diff --git a/src/soc/intel/apollolake/include/soc/spi.h b/src/soc/intel/apollolake/include/soc/flash_ctrlr.h index 4f16a85717..5b9c6222b3 100644 --- a/src/soc/intel/apollolake/include/soc/spi.h +++ b/src/soc/intel/apollolake/include/soc/flash_ctrlr.h @@ -84,8 +84,10 @@ * Reads status register. On success returns 0 and status contains the value * read from the status register. On error returns -1. */ -int spi_read_status(uint8_t *status); +int spi_flash_read_status(uint8_t *status); /* Read SPI controller register. */ -uint32_t spi_ctrlr_reg_read(uint16_t reg); +uint32_t spi_flash_ctrlr_reg_read(uint16_t reg); + +void spi_flash_init(void); #endif diff --git a/src/soc/intel/apollolake/mmap_boot.c b/src/soc/intel/apollolake/mmap_boot.c index bf2e5b95b4..7159c24f52 100644 --- a/src/soc/intel/apollolake/mmap_boot.c +++ b/src/soc/intel/apollolake/mmap_boot.c @@ -22,9 +22,9 @@ #include <commonlib/region.h> #include <console/console.h> #include <fmap.h> +#include <soc/flash_ctrlr.h> #include <soc/intel/common/nvm.h> #include <soc/mmap_boot.h> -#include <soc/spi.h> /* * BIOS region on the flash is mapped right below 4GiB in the address @@ -81,7 +81,7 @@ static void bios_mmap_init(void) * Base and Limit. * Base and Limit fields are in units of 4KiB. */ - uint32_t val = spi_ctrlr_reg_read(SPIBAR_BIOS_BFPREG); + uint32_t val = spi_flash_ctrlr_reg_read(SPIBAR_BIOS_BFPREG); start = (val & SPIBAR_BFPREG_PRB_MASK) * 4 * KiB; bios_end = (((val & SPIBAR_BFPREG_PRL_MASK) >> diff --git a/src/soc/intel/apollolake/romstage.c b/src/soc/intel/apollolake/romstage.c index 039b586263..77562c4699 100644 --- a/src/soc/intel/apollolake/romstage.c +++ b/src/soc/intel/apollolake/romstage.c @@ -32,14 +32,15 @@ #include <fsp/memmap.h> #include <fsp/util.h> #include <soc/cpu.h> +#include <soc/flash_ctrlr.h> #include <soc/intel/common/mrc_cache.h> #include <soc/iomap.h> #include <soc/northbridge.h> #include <soc/pci_devs.h> #include <soc/pm.h> #include <soc/romstage.h> -#include <soc/spi.h> #include <soc/uart.h> +#include <spi_flash.h> #include <string.h> #include <timestamp.h> #include <timer.h> @@ -316,7 +317,12 @@ void mainboard_save_dimm_info(void) int get_sw_write_protect_state(void) { uint8_t status; + struct spi_flash *flash; + + flash = spi_flash_probe(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, 0); + if (!flash) + return 0; /* Return unprotected status if status read fails. */ - return spi_read_status(&status) ? 0 : !!(status & 0x80); + return spi_flash_status(flash, &status) ? 0 : !!(status & 0x80); } diff --git a/src/soc/intel/apollolake/spi.c b/src/soc/intel/apollolake/spi.c index f9c17cdc2a..87d4d01241 100644 --- a/src/soc/intel/apollolake/spi.c +++ b/src/soc/intel/apollolake/spi.c @@ -1,8 +1,7 @@ /* * This file is part of the coreboot project. * - * Copyright (C) 2016 Intel Corp. - * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.) + * Copyright 2016 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 @@ -15,401 +14,29 @@ * GNU General Public License for more details. */ -#define __SIMPLE_DEVICE__ - -#include <arch/early_variables.h> -#include <arch/io.h> #include <console/console.h> -#include <device/device.h> -#include <device/pci.h> -#include <soc/intel/common/spi_flash.h> -#include <soc/pci_devs.h> -#include <soc/spi.h> -#include <spi_flash.h> #include <spi-generic.h> -#include <stdlib.h> -#include <string.h> - -/* Helper to create a SPI context on API entry. */ -#define BOILERPLATE_CREATE_CTX(ctx) \ - struct spi_ctx real_ctx; \ - struct spi_ctx *ctx = &real_ctx; \ - _spi_get_ctx(ctx) - -/* - * Anything that's not success is <0. Provided solely for readability, as these - * constants are not used outside this file. - */ -enum errors { - SUCCESS = 0, - E_NOT_IMPLEMENTED = -1, - E_TIMEOUT = -2, - E_HW_ERROR = -3, - E_ARGUMENT = -4, -}; - -/* Reduce data-passing burden by grouping transaction data in a context. */ -struct spi_ctx { - uintptr_t mmio_base; - device_t pci_dev; - uint32_t hsfsts_on_last_error; -}; - -static void _spi_get_ctx(struct spi_ctx *ctx) -{ - uint32_t bar; - - /* FIXME: use device definition */ - ctx->pci_dev = SPI_DEV; - bar = pci_read_config32(ctx->pci_dev, PCI_BASE_ADDRESS_0); - ctx->mmio_base = bar & ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; - ctx->hsfsts_on_last_error = 0; -} - -/* Read register from the SPI controller. 'reg' is the register offset. */ -static uint32_t _spi_ctrlr_reg_read(struct spi_ctx *ctx, uint16_t reg) +/* SPI controller managing the fast SPI. */ +static int fast_spi_ctrlr_setup(const struct spi_slave *dev) { - uintptr_t addr = ALIGN_DOWN(ctx->mmio_base + reg, 4); - return read32((void *)addr); -} - -uint32_t spi_ctrlr_reg_read(uint16_t reg) -{ - BOILERPLATE_CREATE_CTX(ctx); - return _spi_ctrlr_reg_read(ctx, reg); -} - -/* Write to register in the SPI controller. 'reg' is the register offset. */ -static void _spi_ctrlr_reg_write(struct spi_ctx *ctx, uint16_t reg, - uint32_t val) -{ - uintptr_t addr = ALIGN_DOWN(ctx->mmio_base + reg, 4); - write32((void *)addr, val); - -} - -/* - * The hardware datasheet is not clear on what HORD values actually do. It - * seems that HORD_SFDP provides access to the first 8 bytes of the SFDP, which - * is the signature and revision fields. HORD_JEDEC provides access to the - * actual flash parameters, and is most likely what you want to use when - * probing the flash from software. - * It's okay to rely on SFPD, since the SPI controller requires an SFDP 1.5 or - * newer compliant SPI chip. - * NOTE: Due to the register layout of the hardware, all accesses will be - * aligned to a 4 byte boundary. - */ -static uint32_t read_spi_sfdp_param(struct spi_ctx *ctx, uint16_t sfdp_reg) -{ - uint32_t ptinx_index = sfdp_reg & SPIBAR_PTINX_IDX_MASK; - _spi_ctrlr_reg_write(ctx, SPIBAR_PTINX, - ptinx_index | SPIBAR_PTINX_HORD_JEDEC); - return _spi_ctrlr_reg_read(ctx, SPIBAR_PTDATA); -} - -/* Fill FDATAn FIFO in preparation for a write transaction. */ -static void fill_xfer_fifo(struct spi_ctx *ctx, const void *data, size_t len) -{ - len = min(len, SPIBAR_FDATA_FIFO_SIZE); - - /* YES! memcpy() works. FDATAn does not require 32-bit accesses. */ - memcpy((void*)(ctx->mmio_base + SPIBAR_FDATA(0)), data, len); -} - -/* Drain FDATAn FIFO after a read transaction populates data. */ -static void drain_xfer_fifo(struct spi_ctx *ctx, void *dest, size_t len) -{ - len = min(len, SPIBAR_FDATA_FIFO_SIZE); - - /* YES! memcpy() works. FDATAn does not require 32-bit accesses. */ - memcpy(dest, (void*)(ctx->mmio_base + SPIBAR_FDATA(0)), len); -} - -/* Fire up a transfer using the hardware sequencer. */ -static void start_hwseq_xfer(struct spi_ctx *ctx, uint32_t hsfsts_cycle, - uint32_t flash_addr, size_t len) -{ - /* Make sure all W1C status bits get cleared. */ - uint32_t hsfsts = SPIBAR_HSFSTS_W1C_BITS; - /* Set up transaction parameters. */ - hsfsts |= hsfsts_cycle & SPIBAR_HSFSTS_FCYCLE_MASK; - hsfsts |= SPIBAR_HSFSTS_FBDC(len - 1); - - _spi_ctrlr_reg_write(ctx, SPIBAR_FADDR, flash_addr); - _spi_ctrlr_reg_write(ctx, SPIBAR_HSFSTS_CTL, - hsfsts | SPIBAR_HSFSTS_FGO); -} - -static void print_xfer_error(struct spi_ctx *ctx, const char *failure_reason, - uint32_t flash_addr) -{ - printk(BIOS_ERR, "SPI Transaction %s at flash offset %x.\n" - "\tHSFSTS = 0x%08x\n", - failure_reason, flash_addr, ctx->hsfsts_on_last_error); -} - -static int wait_for_hwseq_xfer(struct spi_ctx *ctx) -{ - uint32_t hsfsts; - do { - hsfsts = _spi_ctrlr_reg_read(ctx, SPIBAR_HSFSTS_CTL); - - if (hsfsts & SPIBAR_HSFSTS_FCERR) { - ctx->hsfsts_on_last_error = hsfsts; - return E_HW_ERROR; - } - /* TODO: set up timer and abort on timeout */ - } while (!(hsfsts & SPIBAR_HSFSTS_FDONE)); - - return SUCCESS; -} - -/* Execute SPI transfer. This is a blocking call. */ -static int exec_sync_hwseq_xfer(struct spi_ctx *ctx, uint32_t hsfsts_cycle, - uint32_t flash_addr, size_t len) -{ - int ret; - start_hwseq_xfer(ctx, hsfsts_cycle, flash_addr, len); - ret = wait_for_hwseq_xfer(ctx); - if (ret != SUCCESS) { - const char *reason = (ret == E_TIMEOUT) ? "timeout" : "error"; - print_xfer_error(ctx, reason, flash_addr); - } - return ret; -} - -unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) -{ - return MIN(buf_len, SPIBAR_FDATA_FIFO_SIZE); -} - -/* - * Write-protection status for BIOS region (BIOS_CONTROL register): - * EISS/WPD bits 00 01 10 11 - * -- -- -- -- - * normal mode RO RW RO RO - * SMM mode RO RW RO RW - */ -void spi_init(void) -{ - uint32_t bios_ctl; - - BOILERPLATE_CREATE_CTX(ctx); - - bios_ctl = pci_read_config32(ctx->pci_dev, SPIBAR_BIOS_CONTROL); - bios_ctl |= SPIBAR_BIOS_CONTROL_WPD; - bios_ctl &= ~SPIBAR_BIOS_CONTROL_EISS; - - /* Enable Prefetching and caching. */ - bios_ctl |= SPIBAR_BIOS_CONTROL_PREFETCH_ENABLE; - bios_ctl &= ~SPIBAR_BIOS_CONTROL_CACHE_DISABLE; - - pci_write_config32(ctx->pci_dev, SPIBAR_BIOS_CONTROL, bios_ctl); -} - -static int nuclear_spi_erase(const struct spi_flash *flash, uint32_t offset, - size_t len) -{ - int ret; - size_t erase_size; - uint32_t erase_cycle; - - BOILERPLATE_CREATE_CTX(ctx); - - if (!IS_ALIGNED(offset, 4 * KiB) || !IS_ALIGNED(len, 4 * KiB)) { - printk(BIOS_ERR, "BUG! SPI erase region not sector aligned.\n"); - return E_ARGUMENT; - } - - while (len) { - if (IS_ALIGNED(offset, 64 * KiB) && (len >= 64 * KiB)) { - erase_size = 64 * KiB; - erase_cycle = SPIBAR_HSFSTS_CYCLE_64K_ERASE; - } else { - erase_size = 4 * KiB; - erase_cycle = SPIBAR_HSFSTS_CYCLE_4K_ERASE; - } - printk(BIOS_SPEW, "Erasing flash addr %x + %zu KiB\n", - offset, erase_size / KiB); - - ret = exec_sync_hwseq_xfer(ctx, erase_cycle, offset, 0); - if (ret != SUCCESS) - return ret; - - offset += erase_size; - len -= erase_size; - } - - return SUCCESS; -} - -/* - * Ensure read/write xfer len is not greater than SPIBAR_FDATA_FIFO_SIZE and - * that the operation does not cross 256-byte boundary. - */ -static size_t get_xfer_len(uint32_t addr, size_t len) -{ - size_t xfer_len = min(len, SPIBAR_FDATA_FIFO_SIZE); - size_t bytes_left = ALIGN_UP(addr, 256) - addr; - - if (bytes_left) - xfer_len = min(xfer_len, bytes_left); - - return xfer_len; -} - -static int nuclear_spi_read(const struct spi_flash *flash, uint32_t addr, - size_t len, void *buf) -{ - int ret; - size_t xfer_len; - uint8_t *data = buf; - - BOILERPLATE_CREATE_CTX(ctx); - - while (len) { - xfer_len = get_xfer_len(addr, len); - - ret = exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_READ, - addr, xfer_len); - if (ret != SUCCESS) - return ret; - - drain_xfer_fifo(ctx, data, xfer_len); - - addr += xfer_len; - data += xfer_len; - len -= xfer_len; - } - - return SUCCESS; -} - -static int nuclear_spi_write(const struct spi_flash *flash, uint32_t addr, - size_t len, const void *buf) -{ - int ret; - size_t xfer_len; - const uint8_t *data = buf; - - BOILERPLATE_CREATE_CTX(ctx); - - while (len) { - xfer_len = get_xfer_len(addr, len); - fill_xfer_fifo(ctx, data, xfer_len); - - ret = exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_WRITE, - addr, xfer_len); - if (ret != SUCCESS) - return ret; - - addr += xfer_len; - data += xfer_len; - len -= xfer_len; - } - - return SUCCESS; -} - -static int nuclear_spi_status(const struct spi_flash *flash, uint8_t *reg) -{ - int ret; - BOILERPLATE_CREATE_CTX(ctx); - - ret = exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_RD_STATUS, 0, - sizeof(*reg)); - if (ret != SUCCESS) - return ret; - - drain_xfer_fifo(ctx, reg, sizeof(*reg)); - return ret; -} - -static struct spi_flash boot_flash CAR_GLOBAL; - -/* - * We can't use FDOC and FDOD to read FLCOMP, as previous platforms did. - * For details see: - * Ch 31, SPI: p. 194 - * The size of the flash component is always taken from density field in the - * SFDP table. FLCOMP.C0DEN is no longer used by the Flash Controller. - */ -struct spi_flash *spi_flash_programmer_probe(struct spi_slave *spi, int force) -{ - BOILERPLATE_CREATE_CTX(ctx); - struct spi_flash *flash; - uint32_t flash_bits; - - flash = car_get_var_ptr(&boot_flash); - - /* - * bytes = (bits + 1) / 8; - * But we need to do the addition in a way which doesn't overflow for - * 4 Gbit devices (flash_bits == 0xffffffff). - */ - /* FIXME: Don't hardcode 0x04 ? */ - flash_bits = read_spi_sfdp_param(ctx, 0x04); - flash->size = (flash_bits >> 3) + 1; - - memcpy(&flash->spi, spi, sizeof(*spi)); - - flash->name = "Apollolake hardware sequencer"; - - /* Can erase both 4 KiB and 64 KiB chunks. Declare the smaller size. */ - flash->sector_size = 4 * KiB; - /* - * FIXME: Get erase+cmd, and status_cmd from SFDP. - * - * flash->erase_cmd = ??? - * flash->status_cmd = ??? - */ - - flash->internal_write = nuclear_spi_write; - flash->internal_erase = nuclear_spi_erase; - flash->internal_read = nuclear_spi_read; - flash->internal_status = nuclear_spi_status; - - return flash; -} - -int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave) -{ - BOILERPLATE_CREATE_CTX(ctx); - - /* This is special hardware. We expect bus 0 and CS line 0 here. */ - if ((bus != 0) || (cs != 0)) + if ((dev->bus != 0) && (dev->cs != 0)) { + printk(BIOS_ERR, "%s: Unsupported device " + "bus=0x%x,cs=0x%x!\n", __func__, dev->bus, dev->cs); return -1; + } - slave->bus = bus; - slave->cs = cs; - slave->ctrlr = NULL; - - return 0; -} - -int spi_read_status(uint8_t *status) -{ - BOILERPLATE_CREATE_CTX(ctx); - - if (exec_sync_hwseq_xfer(ctx, SPIBAR_HSFSTS_CYCLE_RD_STATUS, 0, - sizeof(*status)) != SUCCESS) - return -1; - - drain_xfer_fifo(ctx, status, sizeof(*status)); - + printk(BIOS_INFO, "%s: Found controller for device " + "(bus=0x%x,cs=0x%x)!!\n", __func__, dev->bus, dev->cs); return 0; } -int spi_flash_get_fpr_info(struct fpr_info *info) -{ - BOILERPLATE_CREATE_CTX(ctx); - - if (!ctx->mmio_base) - return -1; +static const struct spi_ctrlr fast_spi_ctrlr = { + .setup = fast_spi_ctrlr_setup, +}; - info->base = ctx->mmio_base + SPIBAR_FPR_BASE; - info->max = SPIBAR_FPR_MAX; +const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = { + { .ctrlr = &fast_spi_ctrlr, .bus_start = 0, .bus_end = 0 }, +}; - return 0; -} +const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map); |