new file mode 100644
@@ -0,0 +1,372 @@
+/*
+ * Intel Baytrail SST DSP driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/firmware.h>
+
+#include "sst-dsp.h"
+#include "sst-dsp-priv.h"
+#include "sst-baytrail-ipc.h"
+
+#define SST_BYT_FW_SIGNATURE_SIZE 4
+#define SST_BYT_FW_SIGN "$SST"
+
+#define SST_BYT_IRAM_OFFSET 0xC0000
+#define SST_BYT_DRAM_OFFSET 0x100000
+#define SST_BYT_SHIM_OFFSET 0x140000
+
+enum sst_ram_type {
+ SST_BYT_IRAM = 1,
+ SST_BYT_DRAM = 2,
+ SST_BYT_CACHE = 3,
+};
+
+struct dma_block_info {
+ enum sst_ram_type type; /* IRAM/DRAM */
+ u32 size; /* Bytes */
+ u32 ram_offset; /* Offset in I/DRAM */
+ u32 rsvd; /* Reserved field */
+};
+
+struct fw_header {
+ unsigned char signature[SST_BYT_FW_SIGNATURE_SIZE];
+ u32 file_size; /* size of fw minus this header */
+ u32 modules; /* # of modules */
+ u32 file_format; /* version of header format */
+ u32 reserved[4];
+};
+
+struct sst_byt_fw_module_header {
+ unsigned char signature[SST_BYT_FW_SIGNATURE_SIZE];
+ u32 mod_size; /* size of module */
+ u32 blocks; /* # of blocks */
+ u32 type; /* codec type, pp lib */
+ u32 entry_point;
+};
+
+static int sst_byt_parse_module(struct sst_dsp *dsp, struct sst_fw *fw,
+ struct sst_byt_fw_module_header *module)
+{
+ struct dma_block_info *block;
+ struct sst_module *mod;
+ struct sst_module_data block_data;
+ struct sst_module_template template;
+ int count;
+
+ memset(&template, 0, sizeof(template));
+ template.id = module->type;
+ template.entry = module->entry_point;
+ template.p.type = SST_MEM_DRAM;
+ template.p.data_type = SST_DATA_P;
+ template.s.type = SST_MEM_DRAM;
+ template.s.data_type = SST_DATA_S;
+
+ mod = sst_module_new(fw, &template, NULL);
+ if (mod == NULL)
+ return -ENOMEM;
+
+ block = (void *)module + sizeof(*module);
+
+ for (count = 0; count < module->blocks; count++) {
+
+ if (block->size <= 0) {
+ dev_err(dsp->dev, "block %d size invalid\n", count);
+ return -EINVAL;
+ }
+
+ switch (block->type) {
+ case SST_BYT_IRAM:
+ block_data.offset = block->ram_offset +
+ dsp->addr.iram_offset;
+ block_data.type = SST_MEM_IRAM;
+ break;
+ case SST_BYT_DRAM:
+ block_data.offset = block->ram_offset +
+ dsp->addr.dram_offset;
+ block_data.type = SST_MEM_DRAM;
+ break;
+ case SST_BYT_CACHE:
+ block_data.offset = block->ram_offset +
+ (dsp->addr.fw_ext - dsp->addr.lpe);
+ block_data.type = SST_MEM_CACHE;
+ break;
+ default:
+ dev_err(dsp->dev, "wrong ram type 0x%x in block0x%x\n",
+ block->type, count);
+ return -EINVAL;
+ }
+
+ block_data.size = block->size;
+ block_data.data_type = SST_DATA_M;
+ block_data.data = (void *)block + sizeof(*block);
+
+ sst_module_insert_fixed_block(mod, &block_data);
+
+ block = (void *)block + sizeof(*block) + block->size;
+ }
+ return 0;
+}
+
+static int sst_byt_parse_fw_image(struct sst_fw *sst_fw)
+{
+ struct fw_header *header;
+ struct sst_byt_fw_module_header *module;
+ struct sst_dsp *dsp = sst_fw->dsp;
+ int ret, count;
+
+ /* Read the header information from the data pointer */
+ header = (struct fw_header *)sst_fw->dma_buf;
+
+ /* verify FW */
+ if ((strncmp(header->signature, SST_BYT_FW_SIGN, 4) != 0) ||
+ (sst_fw->size != header->file_size + sizeof(*header))) {
+ /* Invalid FW signature */
+ dev_err(dsp->dev, "Invalid FW sign/filesize mismatch\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dsp->dev,
+ "header sign=%4s size=0x%x modules=0x%x fmt=0x%x size=%zu\n",
+ header->signature, header->file_size, header->modules,
+ header->file_format, sizeof(*header));
+
+ module = (void *)sst_fw->dma_buf + sizeof(*header);
+ for (count = 0; count < header->modules; count++) {
+ /* module */
+ ret = sst_byt_parse_module(dsp, sst_fw, module);
+ if (ret < 0) {
+ dev_err(dsp->dev, "invalid module %d\n", count);
+ return ret;
+ }
+ module = (void *)module + sizeof(*module) + module->mod_size;
+ }
+
+ return 0;
+}
+
+static void sst_byt_dump_shim(struct sst_dsp *sst)
+{
+ int i;
+ u64 reg;
+
+ for (i = 0; i <= 0xF0; i += 8) {
+ reg = sst_dsp_shim_read64_unlocked(sst, i);
+ if (reg)
+ dev_dbg(sst->dev, "shim 0x%2.2x value 0x%16.16llx\n",
+ i, reg);
+ }
+
+ for (i = 0x00; i <= 0xff; i += 4) {
+ reg = readl(sst->addr.pci_cfg + i);
+ if (reg)
+ dev_dbg(sst->dev, "pci 0x%2.2x value 0x%8.8x\n",
+ i, (u32)reg);
+ }
+}
+
+static irqreturn_t sst_byt_irq(int irq, void *context)
+{
+ struct sst_dsp *sst = (struct sst_dsp *) context;
+ u64 isrx;
+ irqreturn_t ret = IRQ_NONE;
+
+ spin_lock(&sst->spinlock);
+
+ isrx = sst_dsp_shim_read64_unlocked(sst, SST_ISRX);
+ if (isrx & SST_ISRX_DONE) {
+ /* ADSP has processed the message request from IA */
+ sst_dsp_shim_update_bits64_unlocked(sst, SST_IPCX,
+ SST_BYT_IPCX_DONE, 0);
+ ret = IRQ_WAKE_THREAD;
+ }
+ if (isrx & SST_BYT_ISRX_REQUEST) {
+ /* mask message request from ADSP and do processing later */
+ sst_dsp_shim_update_bits64_unlocked(sst, SST_IMRX,
+ SST_BYT_IMRX_REQUEST,
+ SST_BYT_IMRX_REQUEST);
+ ret = IRQ_WAKE_THREAD;
+ }
+
+ spin_unlock(&sst->spinlock);
+
+ return ret;
+}
+
+static void sst_byt_boot(struct sst_dsp *sst)
+{
+ int tries = 10;
+
+ /* release stall and wait to unstall */
+ sst_dsp_shim_update_bits64(sst, SST_CSR, SST_BYT_CSR_STALL, 0x0);
+ while (tries--) {
+ if (!(sst_dsp_shim_read64(sst, SST_CSR) &
+ SST_BYT_CSR_PWAITMODE))
+ break;
+ msleep(100);
+ }
+ if (tries < 0) {
+ dev_err(sst->dev, "unable to start DSP\n");
+ sst_byt_dump_shim(sst);
+ }
+}
+
+static void sst_byt_reset(struct sst_dsp *sst)
+{
+ /* put DSP into reset, set reset vector and stall */
+ sst_dsp_shim_update_bits64(sst, SST_CSR,
+ SST_BYT_CSR_RST | SST_BYT_CSR_VECTOR_SEL | SST_BYT_CSR_STALL,
+ SST_BYT_CSR_RST | SST_BYT_CSR_VECTOR_SEL | SST_BYT_CSR_STALL);
+
+ udelay(10);
+
+ /* take DSP out of reset and keep stalled for FW loading */
+ sst_dsp_shim_update_bits64(sst, SST_CSR, SST_BYT_CSR_RST, 0);
+}
+
+struct sst_adsp_memregion {
+ u32 start;
+ u32 end;
+ int blocks;
+ enum sst_mem_type type;
+};
+
+/* BYT test stuff */
+static const struct sst_adsp_memregion byt_region[] = {
+ {0xC0000, 0x100000, 8, SST_MEM_IRAM}, /* I-SRAM - 8 * 32kB */
+ {0x100000, 0x140000, 8, SST_MEM_DRAM}, /* D-SRAM0 - 8 * 32kB */
+};
+
+static int sst_byt_resource_map(struct sst_dsp *sst, struct sst_pdata *pdata)
+{
+ sst->addr.lpe_base = pdata->lpe_base;
+ sst->addr.lpe = ioremap(pdata->lpe_base, pdata->lpe_size);
+ if (!sst->addr.lpe)
+ return -ENODEV;
+
+ /* ADSP PCI MMIO config space */
+ sst->addr.pci_cfg = ioremap(pdata->pcicfg_base, pdata->pcicfg_size);
+ if (!sst->addr.pci_cfg) {
+ iounmap(sst->addr.lpe);
+ return -ENODEV;
+ }
+
+ /* SST Extended FW allocation */
+ sst->addr.fw_ext = ioremap(pdata->fw_base, pdata->fw_size);
+ if (!sst->addr.fw_ext) {
+ iounmap(sst->addr.pci_cfg);
+ iounmap(sst->addr.lpe);
+ return -ENODEV;
+ }
+
+ /* SST Shim */
+ sst->addr.shim = sst->addr.lpe + sst->addr.shim_offset;
+
+ sst_dsp_mailbox_init(sst, SST_BYT_MAILBOX_OFFSET + 0x204,
+ SST_BYT_IPC_MAX_PAYLOAD_SIZE,
+ SST_BYT_MAILBOX_OFFSET,
+ SST_BYT_IPC_MAX_PAYLOAD_SIZE);
+
+ sst->irq = pdata->irq;
+
+ return 0;
+}
+
+static int sst_byt_init(struct sst_dsp *sst, struct sst_pdata *pdata)
+{
+ const struct sst_adsp_memregion *region;
+ struct device *dev;
+ int ret = -ENODEV, i, j, region_count;
+ u32 offset, size;
+
+ dev = sst->dev;
+
+ switch (sst->id) {
+ case SST_DEV_ID_BYT:
+ region = byt_region;
+ region_count = ARRAY_SIZE(byt_region);
+ sst->addr.iram_offset = SST_BYT_IRAM_OFFSET;
+ sst->addr.dram_offset = SST_BYT_DRAM_OFFSET;
+ sst->addr.shim_offset = SST_BYT_SHIM_OFFSET;
+ break;
+ default:
+ dev_err(dev, "failed to get mem resources\n");
+ return ret;
+ }
+
+ ret = sst_byt_resource_map(sst, pdata);
+ if (ret < 0) {
+ dev_err(dev, "failed to map resources\n");
+ return ret;
+ }
+
+ /*
+ * save the physical address of extended firmware block in the first
+ * 4 bytes of the mailbox
+ */
+ memcpy_toio(sst->addr.lpe + SST_BYT_MAILBOX_OFFSET,
+ &pdata->fw_base, sizeof(u32));
+
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ /* enable Interrupt from both sides */
+ sst_dsp_shim_update_bits64(sst, SST_IMRX, 0x3, 0x0);
+ sst_dsp_shim_update_bits64(sst, SST_IMRD, 0x3, 0x0);
+
+ /* register DSP memory blocks - ideally we should get this from ACPI */
+ for (i = 0; i < region_count; i++) {
+ offset = region[i].start;
+ size = (region[i].end - region[i].start) / region[i].blocks;
+
+ /* register individual memory blocks */
+ for (j = 0; j < region[i].blocks; j++) {
+ sst_mem_block_register(sst, offset, size,
+ region[i].type, NULL, j, sst);
+ offset += size;
+ }
+ }
+
+ return 0;
+}
+
+static void sst_byt_free(struct sst_dsp *sst)
+{
+ sst_mem_block_unregister_all(sst);
+ iounmap(sst->addr.lpe);
+ iounmap(sst->addr.pci_cfg);
+ iounmap(sst->addr.fw_ext);
+}
+
+struct sst_ops sst_byt_ops = {
+ .reset = sst_byt_reset,
+ .boot = sst_byt_boot,
+ .write = sst_shim32_write,
+ .read = sst_shim32_read,
+ .write64 = sst_shim32_write64,
+ .read64 = sst_shim32_read64,
+ .ram_read = sst_memcpy_fromio_32,
+ .ram_write = sst_memcpy_toio_32,
+ .irq_handler = sst_byt_irq,
+ .init = sst_byt_init,
+ .free = sst_byt_free,
+ .parse_fw = sst_byt_parse_fw_image,
+};
@@ -66,6 +66,7 @@ struct sst_addr {
u32 lpe_base;
u32 shim_offset;
u32 iram_offset;
+ u32 dram_offset;
void __iomem *lpe;
void __iomem *shim;
void __iomem *pci_cfg;
This adds basic functionality for Baytrail SST DSP initialization and firmware loading. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> --- sound/soc/intel/sst-baytrail-dsp.c | 372 +++++++++++++++++++++++++++++++++++++ sound/soc/intel/sst-dsp-priv.h | 1 + 2 files changed, 373 insertions(+) create mode 100644 sound/soc/intel/sst-baytrail-dsp.c