summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/soc/amd/stoneyridge/Makefile.inc2
-rw-r--r--src/soc/amd/stoneyridge/include/soc/southbridge.h26
-rw-r--r--src/soc/amd/stoneyridge/spi.c207
3 files changed, 234 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/Makefile.inc b/src/soc/amd/stoneyridge/Makefile.inc
index 197145aee4..f2a9d8d4f5 100644
--- a/src/soc/amd/stoneyridge/Makefile.inc
+++ b/src/soc/amd/stoneyridge/Makefile.inc
@@ -91,12 +91,14 @@ ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi_util.c
ramstage-$(CONFIG_STONEYRIDGE_UART) += uart.c
ramstage-y += usb.c
ramstage-y += tsc_freq.c
+ramstage-$(CONFIG_SPI_FLASH) += spi.c
smm-y += smihandler.c
smm-y += smi_util.c
smm-y += sb_util.c
smm-y += tsc_freq.c
smm-$(CONFIG_DEBUG_SMI) += uart.c
+smm-$(CONFIG_SPI_FLASH) += spi.c
CPPFLAGS_common += -I$(src)/soc/amd/stoneyridge
CPPFLAGS_common += -I$(src)/soc/amd/stoneyridge/include
diff --git a/src/soc/amd/stoneyridge/include/soc/southbridge.h b/src/soc/amd/stoneyridge/include/soc/southbridge.h
index c79457b4c7..238feba53a 100644
--- a/src/soc/amd/stoneyridge/include/soc/southbridge.h
+++ b/src/soc/amd/stoneyridge/include/soc/southbridge.h
@@ -197,7 +197,11 @@
#define LPC_HOST_CONTROL 0xbb
#define SPI_FROM_HOST_PREFETCH_EN BIT(0)
+/* SPI Controller */
+#define SPI_FIFO_DEPTH 8
+
#define SPI_CNTRL0 0x00
+#define SPI_BUSY BIT(31)
#define SPI_READ_MODE_MASK (BIT(30) | BIT(29) | BIT(18))
/* Nominal is 16.7MHz on older devices, 33MHz on newer */
#define SPI_READ_MODE_NOM 0x00000000
@@ -207,14 +211,34 @@
#define SPI_READ_MODE_QUAD144 (BIT(30) | BIT(18))
#define SPI_READ_MODE_NORMAL66 (BIT(30) | BIT(29) )
#define SPI_READ_MODE_FAST (BIT(30) | BIT(29) | BIT(18))
+#define SPI_FIFO_PTR_CLR BIT(20)
#define SPI_ARB_ENABLE BIT(19)
-
+#define EXEC_OPCODE BIT(16)
+#define SPI_REG_CNTRL01 0x01
+#define SPI_REG_CNTRL02 0x02
+#define SPI_FIFO_PTR_CLR02 (SPI_FIFO_PTR_CLR >> 16)
#define SPI_CNTRL1 0x0c
+#define SPI_FIFO_PTR_MASK (BIT(8) | BIT(9) | BIT(10))
+#define SPI_CNTRL11 0x0d
+#define SPI_FIFO_PTR_MASK11 (SPI_FIFO_PTR_MASK >> 8)
+
+#define SPI100_SPEED_CONFIG 0x22
/* Use SPI_SPEED_16M-SPI_SPEED_66M below for the southbridge */
#define SPI_CNTRL1_SPEED_MASK (BIT(15) | BIT(14) | BIT(13) | BIT(12))
#define SPI_NORM_SPEED_SH 12
#define SPI_FAST_SPEED_SH 8
+#define SPI_EXT_INDEX 0x1e
+#define SPI_EXT_DATA 0x1f
+#define SPI_DDR_CMD 0x0
+#define SPI_QDR_CMD 0x1
+#define SPI_DPR_CMD 0x2
+#define SPI_QPR_CMD 0x3
+#define SPI_MODE_BYTE 0x4
+#define SPI_TX_BYTE_COUNT 0x5
+#define SPI_RX_BYTE_COUNT 0x6
+#define SPI_SPI_DATA_FIFO_PTR 0x7
+
#define SPI100_ENABLE 0x20
#define SPI_USE_SPI100 BIT(0)
diff --git a/src/soc/amd/stoneyridge/spi.c b/src/soc/amd/stoneyridge/spi.c
new file mode 100644
index 0000000000..84b56dfa3d
--- /dev/null
+++ b/src/soc/amd/stoneyridge/spi.c
@@ -0,0 +1,207 @@
+/*
+ * 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 <string.h>
+#include <arch/io.h>
+#include <arch/early_variables.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 <soc/pci_devs.h>
+#include <soc/imc.h>
+
+static uintptr_t spibar CAR_GLOBAL;
+
+static uintptr_t get_spibase(void)
+{
+ return *(uintptr_t *)car_get_var_ptr(&spibar);
+}
+
+static void set_spibar(uintptr_t base)
+{
+ *(uintptr_t *)car_get_var_ptr(&spibar) = base;
+}
+
+static inline uint8_t spi_read8(uint8_t reg)
+{
+ return read8((void *)(get_spibase() + reg));
+}
+
+static inline uint32_t spi_read32(uint8_t reg)
+{
+ return read32((void *)(get_spibase() + reg));
+}
+
+static inline void spi_write8(uint8_t reg, uint8_t val)
+{
+ write8((void *)(get_spibase() + reg), val);
+}
+
+static inline void spi_write32(uint8_t reg, uint32_t val)
+{
+ write32((void *)(get_spibase() + reg), val);
+}
+
+static int reset_internal_fifo_pointer(void)
+{
+ uint8_t reg;
+ const uint32_t timeout_ms = 500;
+ struct stopwatch sw;
+
+ stopwatch_init_msecs_expire(&sw, timeout_ms);
+
+ do {
+ reg = spi_read8(SPI_REG_CNTRL02);
+ reg |= SPI_FIFO_PTR_CLR02;
+ spi_write8(SPI_REG_CNTRL02, reg);
+ /* wait for ptr=0 */
+ if (!(spi_read8(SPI_CNTRL11) & (SPI_FIFO_PTR_MASK11)))
+ return 0;
+ } while (!stopwatch_expired(&sw));
+
+ printk(BIOS_DEBUG, "FCH SPI Error: FIFO reset failed\n");
+ return -1;
+}
+
+static int execute_command(void)
+{
+ uint32_t reg;
+ const uint32_t timeout_ms = 500;
+ struct stopwatch sw;
+
+ stopwatch_init_msecs_expire(&sw, timeout_ms);
+
+ reg = spi_read32(SPI_CNTRL0);
+ reg |= EXEC_OPCODE;
+ spi_write32(SPI_CNTRL0, reg);
+
+ do {
+ if (!(spi_read32(SPI_CNTRL0) & (EXEC_OPCODE | SPI_BUSY)))
+ return 0;
+ } while (!stopwatch_expired(&sw));
+
+ printk(BIOS_DEBUG, "FCH SPI Error: Timeout executing command\n");
+ return -1;
+}
+
+void spi_init(void)
+{
+ uintptr_t bar;
+
+ bar = pci_read_config32(SOC_LPC_DEV, SPIROM_BASE_ADDRESS_REGISTER);
+ bar = ALIGN_DOWN(bar, 64);
+ set_spibar(bar);
+}
+
+static int do_command(uint8_t cmd, const void *dout,
+ size_t bytesout, void *din, size_t *bytesin)
+{
+ size_t count;
+ size_t max_in = MIN(*bytesin, SPI_FIFO_DEPTH);
+
+ spi_write8(SPI_EXT_INDEX, SPI_TX_BYTE_COUNT);
+ spi_write8(SPI_EXT_DATA, bytesout);
+ spi_write8(SPI_EXT_INDEX, SPI_RX_BYTE_COUNT);
+ spi_write8(SPI_EXT_DATA, max_in);
+ spi_write8(SPI_CNTRL0, cmd);
+
+ if (reset_internal_fifo_pointer())
+ return -1;
+ for (count = 0; count < bytesout; count++, dout++)
+ spi_write8(SPI_CNTRL1, *(uint8_t *)dout);
+
+ if (execute_command())
+ return -1;
+
+ if (reset_internal_fifo_pointer())
+ return -1;
+ for (count = 0; count < bytesout; count++)
+ spi_read8(SPI_CNTRL1); /* skip the bytes we sent */
+
+ for (count = 0; count < max_in; count++, din++)
+ *(uint8_t *)din = spi_read8(SPI_CNTRL1);
+
+ *bytesin -= max_in;
+ return 0;
+}
+
+static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
+ size_t bytesout, void *din, size_t bytesin)
+{
+ uint8_t cmd;
+
+ /* First byte is cmd which cannot be sent through FIFO */
+ cmd = *(uint8_t *)dout++;
+ 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 > SPI_FIFO_DEPTH) {
+ printk(BIOS_DEBUG, "FCH SPI: Too much to write. Does your SPI"
+ " chip driver use spi_crop_chunk()?\n");
+ return -1;
+ }
+
+ do {
+ if (do_command(cmd, dout, bytesout, din, &bytesin))
+ return -1;
+ } while (bytesin);
+
+ return 0;
+}
+
+int chipset_volatile_group_begin(const struct spi_flash *flash)
+{
+ if (IS_ENABLED(CONFIG_STONEYRIDGE_IMC_FWM))
+ imc_sleep();
+ return 0;
+}
+
+int chipset_volatile_group_end(const struct spi_flash *flash)
+{
+ if (IS_ENABLED(CONFIG_STONEYRIDGE_IMC_FWM))
+ imc_wakeup();
+ return 0;
+}
+
+static const struct spi_ctrlr spi_ctrlr = {
+ .xfer = spi_ctrlr_xfer,
+ .xfer_vector = spi_xfer_two_vectors,
+ .max_xfer_size = SPI_FIFO_DEPTH,
+ .deduct_cmd_len = true,
+};
+
+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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 22:16:23 +0000