diff options
Diffstat (limited to 'src/soc/amd/picasso/spi.c')
| -rw-r--r-- | src/soc/amd/picasso/spi.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/src/soc/amd/picasso/spi.c b/src/soc/amd/picasso/spi.c deleted file mode 100644 index 8abfa160f4..0000000000 --- a/src/soc/amd/picasso/spi.c +++ /dev/null @@ -1,189 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2012 Advanced Micro Devices, 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. - */ - -#include <stdint.h> -#include <stdlib.h> -#include <device/mmio.h> -#include <lib.h> -#include <timer.h> -#include <console/console.h> -#include <commonlib/helpers.h> -#include <spi_flash.h> -#include <spi-generic.h> -#include <device/device.h> -#include <device/pci.h> -#include <device/pci_ops.h> -#include <soc/southbridge.h> -#include <amdblocks/lpc.h> -#include <soc/pci_devs.h> - -#define SPI_DEBUG_DRIVER CONFIG(DEBUG_SPI_FLASH) - -static uintptr_t spibar; - -static void set_spibar(uintptr_t base) -{ - spibar = base; -} - -static inline uint8_t spi_read8(uint8_t reg) -{ - return read8((void *)(spibar + reg)); -} - -static inline uint32_t spi_read32(uint8_t reg) -{ - return read32((void *)(spibar + reg)); -} - -static inline void spi_write8(uint8_t reg, uint8_t val) -{ - write8((void *)(spibar + reg), val); -} - -static inline void spi_write32(uint8_t reg, uint32_t val) -{ - write32((void *)(spibar + reg), val); -} - -static void dump_state(const char *str) -{ - if (!SPI_DEBUG_DRIVER) - return; - - printk(BIOS_DEBUG, "SPI: %s\n", str); - printk(BIOS_DEBUG, "Cntrl0: %x\n", spi_read32(SPI_CNTRL0)); - printk(BIOS_DEBUG, "Status: %x\n", spi_read32(SPI_STATUS)); - printk(BIOS_DEBUG, "TxByteCount: %x\n", spi_read8(SPI_TX_BYTE_COUNT)); - printk(BIOS_DEBUG, "RxByteCount: %x\n", spi_read8(SPI_RX_BYTE_COUNT)); - printk(BIOS_DEBUG, "CmdCode: %x\n", spi_read8(SPI_CMD_CODE)); - hexdump((void *)(spibar + SPI_FIFO), SPI_FIFO_DEPTH); -} - -static int wait_for_ready(void) -{ - const uint32_t timeout_ms = 500; - struct stopwatch sw; - - stopwatch_init_msecs_expire(&sw, timeout_ms); - - do { - if (!(spi_read32(SPI_STATUS) & SPI_BUSY)) - return 0; - } while (!stopwatch_expired(&sw)); - - return -1; -} - -static int execute_command(void) -{ - dump_state("Before Execute"); - - spi_write8(SPI_CMD_TRIGGER, SPI_CMD_TRIGGER_EXECUTE); - - if (wait_for_ready()) - printk(BIOS_DEBUG, - "FCH SPI Error: Timeout executing command\n"); - - dump_state("Transaction finished"); - - return 0; -} - -void spi_init(void) -{ - set_spibar(lpc_get_spibase()); -} - -static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout, - size_t bytesout, void *din, size_t bytesin) -{ - size_t count; - uint8_t cmd; - uint8_t *bufin = din; - const uint8_t *bufout = dout; - - if (SPI_DEBUG_DRIVER) - printk(BIOS_DEBUG, "%s(%zx, %zx)\n", __func__, bytesout, - bytesin); - - /* First byte is cmd which cannot be sent through FIFO */ - cmd = bufout[0]; - bufout++; - bytesout--; - - /* - * Check if this is a write command attempting to transfer more bytes - * than the controller can handle. Iterations for writes are not - * supported here because each SPI write command needs to be preceded - * and followed by other SPI commands, and this sequence is controlled - * by the SPI chip driver. - */ - if (bytesout + bytesin > SPI_FIFO_DEPTH) { - printk(BIOS_DEBUG, "FCH SPI: Too much to write. Does your SPI" - " chip driver use spi_crop_chunk()?\n"); - return -1; - } - - if (wait_for_ready()) - return -1; - - spi_write8(SPI_CMD_CODE, cmd); - spi_write8(SPI_TX_BYTE_COUNT, bytesout); - spi_write8(SPI_RX_BYTE_COUNT, bytesin); - - for (count = 0; count < bytesout; count++) - spi_write8(SPI_FIFO + count, bufout[count]); - - if (execute_command()) - return -1; - - for (count = 0; count < bytesin; count++) - bufin[count] = spi_read8(SPI_FIFO + count + bytesout); - - return 0; -} - -int chipset_volatile_group_begin(const struct spi_flash *flash) -{ - return 0; -} - -int chipset_volatile_group_end(const struct spi_flash *flash) -{ - return 0; -} - -static int xfer_vectors(const struct spi_slave *slave, - struct spi_op vectors[], size_t count) -{ - return spi_flash_vector_helper(slave, vectors, count, spi_ctrlr_xfer); -} - -static const struct spi_ctrlr spi_ctrlr = { - .xfer_vector = xfer_vectors, - .max_xfer_size = SPI_FIFO_DEPTH, - .flags = SPI_CNTRLR_DEDUCT_CMD_LEN | SPI_CNTRLR_DEDUCT_OPCODE_LEN, -}; - -const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = { - { - .ctrlr = &spi_ctrlr, - .bus_start = 0, - .bus_end = 0, - }, -}; - -const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map); |