| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jérôme Pouiller | 1961 | 99.59% | 12 | 70.59% |
| Colin Ian King | 2 | 0.10% | 1 | 5.88% |
| Tom Rix | 2 | 0.10% | 1 | 5.88% |
| zhengbin | 2 | 0.10% | 1 | 5.88% |
| Greg Kroah-Hartman | 1 | 0.05% | 1 | 5.88% |
| Sumera Priyadarsini | 1 | 0.05% | 1 | 5.88% |
| Total | 1969 | 17 |
// SPDX-License-Identifier: GPL-2.0-only /* * Firmware loading. * * Copyright (c) 2017-2020, Silicon Laboratories, Inc. * Copyright (c) 2010, ST-Ericsson */ #include <linux/firmware.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/bitfield.h> #include "fwio.h" #include "wfx.h" #include "hwio.h" /* Addresses below are in SRAM area */ #define WFX_DNLD_FIFO 0x09004000 #define DNLD_BLOCK_SIZE 0x0400 #define DNLD_FIFO_SIZE 0x8000 /* (32 * DNLD_BLOCK_SIZE) */ /* Download Control Area (DCA) */ #define WFX_DCA_IMAGE_SIZE 0x0900C000 #define WFX_DCA_PUT 0x0900C004 #define WFX_DCA_GET 0x0900C008 #define WFX_DCA_HOST_STATUS 0x0900C00C #define HOST_READY 0x87654321 #define HOST_INFO_READ 0xA753BD99 #define HOST_UPLOAD_PENDING 0xABCDDCBA #define HOST_UPLOAD_COMPLETE 0xD4C64A99 #define HOST_OK_TO_JUMP 0x174FC882 #define WFX_DCA_NCP_STATUS 0x0900C010 #define NCP_NOT_READY 0x12345678 #define NCP_READY 0x87654321 #define NCP_INFO_READY 0xBD53EF99 #define NCP_DOWNLOAD_PENDING 0xABCDDCBA #define NCP_DOWNLOAD_COMPLETE 0xCAFEFECA #define NCP_AUTH_OK 0xD4C64A99 #define NCP_AUTH_FAIL 0x174FC882 #define NCP_PUB_KEY_RDY 0x7AB41D19 #define WFX_DCA_FW_SIGNATURE 0x0900C014 #define FW_SIGNATURE_SIZE 0x40 #define WFX_DCA_FW_HASH 0x0900C054 #define FW_HASH_SIZE 0x08 #define WFX_DCA_FW_VERSION 0x0900C05C #define FW_VERSION_SIZE 0x04 #define WFX_DCA_RESERVED 0x0900C060 #define DCA_RESERVED_SIZE 0x20 #define WFX_STATUS_INFO 0x0900C080 #define WFX_BOOTLOADER_LABEL 0x0900C084 #define BOOTLOADER_LABEL_SIZE 0x3C #define WFX_PTE_INFO 0x0900C0C0 #define PTE_INFO_KEYSET_IDX 0x0D #define PTE_INFO_SIZE 0x10 #define WFX_ERR_INFO 0x0900C0D0 #define ERR_INVALID_SEC_TYPE 0x05 #define ERR_SIG_VERIF_FAILED 0x0F #define ERR_AES_CTRL_KEY 0x10 #define ERR_ECC_PUB_KEY 0x11 #define ERR_MAC_KEY 0x18 #define DCA_TIMEOUT 50 /* milliseconds */ #define WAKEUP_TIMEOUT 200 /* milliseconds */ static const char * const fwio_errors[] = { [ERR_INVALID_SEC_TYPE] = "Invalid section type or wrong encryption", [ERR_SIG_VERIF_FAILED] = "Signature verification failed", [ERR_AES_CTRL_KEY] = "AES control key not initialized", [ERR_ECC_PUB_KEY] = "ECC public key not initialized", [ERR_MAC_KEY] = "MAC key not initialized", }; /* request_firmware() allocate data using vmalloc(). It is not compatible with underlying hardware * that use DMA. Function below detect this case and allocate a bounce buffer if necessary. * * Notice that, in doubt, you can enable CONFIG_DEBUG_SG to ask kernel to detect this problem at * runtime (else, kernel silently fail). * * NOTE: it may also be possible to use 'pages' from struct firmware and avoid bounce buffer */ static int wfx_sram_write_dma_safe(struct wfx_dev *wdev, u32 addr, const u8 *buf, size_t len) { int ret; const u8 *tmp; if (!virt_addr_valid(buf)) { tmp = kmemdup(buf, len, GFP_KERNEL); if (!tmp) return -ENOMEM; } else { tmp = buf; } ret = wfx_sram_buf_write(wdev, addr, tmp, len); if (tmp != buf) kfree(tmp); return ret; } static int get_firmware(struct wfx_dev *wdev, u32 keyset_chip, const struct firmware **fw, int *file_offset) { int keyset_file; char filename[256]; const char *data; int ret; snprintf(filename, sizeof(filename), "%s_%02X.sec", wdev->pdata.file_fw, keyset_chip); ret = firmware_request_nowarn(fw, filename, wdev->dev); if (ret) { dev_info(wdev->dev, "can't load %s, falling back to %s.sec\n", filename, wdev->pdata.file_fw); snprintf(filename, sizeof(filename), "%s.sec", wdev->pdata.file_fw); ret = request_firmware(fw, filename, wdev->dev); if (ret) { dev_err(wdev->dev, "can't load %s\n", filename); *fw = NULL; return ret; } } data = (*fw)->data; if (memcmp(data, "KEYSET", 6) != 0) { /* Legacy firmware format */ *file_offset = 0; keyset_file = 0x90; } else { *file_offset = 8; keyset_file = (hex_to_bin(data[6]) * 16) | hex_to_bin(data[7]); if (keyset_file < 0) { dev_err(wdev->dev, "%s corrupted\n", filename); release_firmware(*fw); *fw = NULL; return -EINVAL; } } if (keyset_file != keyset_chip) { dev_err(wdev->dev, "firmware keyset is incompatible with chip (file: 0x%02X, chip: 0x%02X)\n", keyset_file, keyset_chip); release_firmware(*fw); *fw = NULL; return -ENODEV; } wdev->keyset = keyset_file; return 0; } static int wait_ncp_status(struct wfx_dev *wdev, u32 status) { ktime_t now, start; u32 reg; int ret; start = ktime_get(); for (;;) { ret = wfx_sram_reg_read(wdev, WFX_DCA_NCP_STATUS, ®); if (ret < 0) return -EIO; now = ktime_get(); if (reg == status) break; if (ktime_after(now, ktime_add_ms(start, DCA_TIMEOUT))) return -ETIMEDOUT; } if (ktime_compare(now, start)) dev_dbg(wdev->dev, "chip answer after %lldus\n", ktime_us_delta(now, start)); else dev_dbg(wdev->dev, "chip answer immediately\n"); return 0; } static int upload_firmware(struct wfx_dev *wdev, const u8 *data, size_t len) { int ret; u32 offs, bytes_done = 0; ktime_t now, start; if (len % DNLD_BLOCK_SIZE) { dev_err(wdev->dev, "firmware size is not aligned. Buffer overrun will occur\n"); return -EIO; } offs = 0; while (offs < len) { start = ktime_get(); for (;;) { now = ktime_get(); if (offs + DNLD_BLOCK_SIZE - bytes_done < DNLD_FIFO_SIZE) break; if (ktime_after(now, ktime_add_ms(start, DCA_TIMEOUT))) return -ETIMEDOUT; ret = wfx_sram_reg_read(wdev, WFX_DCA_GET, &bytes_done); if (ret < 0) return ret; } if (ktime_compare(now, start)) dev_dbg(wdev->dev, "answer after %lldus\n", ktime_us_delta(now, start)); ret = wfx_sram_write_dma_safe(wdev, WFX_DNLD_FIFO + (offs % DNLD_FIFO_SIZE), data + offs, DNLD_BLOCK_SIZE); if (ret < 0) return ret; /* The device seems to not support writing 0 in this register during first loop */ offs += DNLD_BLOCK_SIZE; ret = wfx_sram_reg_write(wdev, WFX_DCA_PUT, offs); if (ret < 0) return ret; } return 0; } static void print_boot_status(struct wfx_dev *wdev) { u32 reg; wfx_sram_reg_read(wdev, WFX_STATUS_INFO, ®); if (reg == 0x12345678) return; wfx_sram_reg_read(wdev, WFX_ERR_INFO, ®); if (reg < ARRAY_SIZE(fwio_errors) && fwio_errors[reg]) dev_info(wdev->dev, "secure boot: %s\n", fwio_errors[reg]); else dev_info(wdev->dev, "secure boot: Error %#02x\n", reg); } static int load_firmware_secure(struct wfx_dev *wdev) { const struct firmware *fw = NULL; int header_size; int fw_offset; ktime_t start; u8 *buf; int ret; BUILD_BUG_ON(PTE_INFO_SIZE > BOOTLOADER_LABEL_SIZE); buf = kmalloc(BOOTLOADER_LABEL_SIZE + 1, GFP_KERNEL); if (!buf) return -ENOMEM; wfx_sram_reg_write(wdev, WFX_DCA_HOST_STATUS, HOST_READY); ret = wait_ncp_status(wdev, NCP_INFO_READY); if (ret) goto error; wfx_sram_buf_read(wdev, WFX_BOOTLOADER_LABEL, buf, BOOTLOADER_LABEL_SIZE); buf[BOOTLOADER_LABEL_SIZE] = 0; dev_dbg(wdev->dev, "bootloader: \"%s\"\n", buf); wfx_sram_buf_read(wdev, WFX_PTE_INFO, buf, PTE_INFO_SIZE); ret = get_firmware(wdev, buf[PTE_INFO_KEYSET_IDX], &fw, &fw_offset); if (ret) goto error; header_size = fw_offset + FW_SIGNATURE_SIZE + FW_HASH_SIZE; wfx_sram_reg_write(wdev, WFX_DCA_HOST_STATUS, HOST_INFO_READ); ret = wait_ncp_status(wdev, NCP_READY); if (ret) goto error; wfx_sram_reg_write(wdev, WFX_DNLD_FIFO, 0xFFFFFFFF); /* Fifo init */ wfx_sram_write_dma_safe(wdev, WFX_DCA_FW_VERSION, "\x01\x00\x00\x00", FW_VERSION_SIZE); wfx_sram_write_dma_safe(wdev, WFX_DCA_FW_SIGNATURE, fw->data + fw_offset, FW_SIGNATURE_SIZE); wfx_sram_write_dma_safe(wdev, WFX_DCA_FW_HASH, fw->data + fw_offset + FW_SIGNATURE_SIZE, FW_HASH_SIZE); wfx_sram_reg_write(wdev, WFX_DCA_IMAGE_SIZE, fw->size - header_size); wfx_sram_reg_write(wdev, WFX_DCA_HOST_STATUS, HOST_UPLOAD_PENDING); ret = wait_ncp_status(wdev, NCP_DOWNLOAD_PENDING); if (ret) goto error; start = ktime_get(); ret = upload_firmware(wdev, fw->data + header_size, fw->size - header_size); if (ret) goto error; dev_dbg(wdev->dev, "firmware load after %lldus\n", ktime_us_delta(ktime_get(), start)); wfx_sram_reg_write(wdev, WFX_DCA_HOST_STATUS, HOST_UPLOAD_COMPLETE); ret = wait_ncp_status(wdev, NCP_AUTH_OK); /* Legacy ROM support */ if (ret < 0) ret = wait_ncp_status(wdev, NCP_PUB_KEY_RDY); if (ret < 0) goto error; wfx_sram_reg_write(wdev, WFX_DCA_HOST_STATUS, HOST_OK_TO_JUMP); error: kfree(buf); release_firmware(fw); if (ret) print_boot_status(wdev); return ret; } static int init_gpr(struct wfx_dev *wdev) { int ret, i; static const struct { int index; u32 value; } gpr_init[] = { { 0x07, 0x208775 }, { 0x08, 0x2EC020 }, { 0x09, 0x3C3C3C }, { 0x0B, 0x322C44 }, { 0x0C, 0xA06497 }, }; for (i = 0; i < ARRAY_SIZE(gpr_init); i++) { ret = wfx_igpr_reg_write(wdev, gpr_init[i].index, gpr_init[i].value); if (ret < 0) return ret; dev_dbg(wdev->dev, " index %02x: %08x\n", gpr_init[i].index, gpr_init[i].value); } return 0; } int wfx_init_device(struct wfx_dev *wdev) { int ret; int hw_revision, hw_type; int wakeup_timeout = 50; /* ms */ ktime_t now, start; u32 reg; reg = CFG_DIRECT_ACCESS_MODE | CFG_CPU_RESET | CFG_BYTE_ORDER_ABCD; if (wdev->pdata.use_rising_clk) reg |= CFG_CLK_RISE_EDGE; ret = wfx_config_reg_write(wdev, reg); if (ret < 0) { dev_err(wdev->dev, "bus returned an error during first write access. Host configuration error?\n"); return -EIO; } ret = wfx_config_reg_read(wdev, ®); if (ret < 0) { dev_err(wdev->dev, "bus returned an error during first read access. Bus configuration error?\n"); return -EIO; } if (reg == 0 || reg == ~0) { dev_err(wdev->dev, "chip mute. Bus configuration error or chip wasn't reset?\n"); return -EIO; } dev_dbg(wdev->dev, "initial config register value: %08x\n", reg); hw_revision = FIELD_GET(CFG_DEVICE_ID_MAJOR, reg); if (hw_revision == 0) { dev_err(wdev->dev, "bad hardware revision number: %d\n", hw_revision); return -ENODEV; } hw_type = FIELD_GET(CFG_DEVICE_ID_TYPE, reg); if (hw_type == 1) { dev_notice(wdev->dev, "development hardware detected\n"); wakeup_timeout = 2000; } ret = init_gpr(wdev); if (ret < 0) return ret; ret = wfx_control_reg_write(wdev, CTRL_WLAN_WAKEUP); if (ret < 0) return -EIO; start = ktime_get(); for (;;) { ret = wfx_control_reg_read(wdev, ®); now = ktime_get(); if (reg & CTRL_WLAN_READY) break; if (ktime_after(now, ktime_add_ms(start, wakeup_timeout))) { dev_err(wdev->dev, "chip didn't wake up. Chip wasn't reset?\n"); return -ETIMEDOUT; } } dev_dbg(wdev->dev, "chip wake up after %lldus\n", ktime_us_delta(now, start)); ret = wfx_config_reg_write_bits(wdev, CFG_CPU_RESET, 0); if (ret < 0) return ret; ret = load_firmware_secure(wdev); if (ret < 0) return ret; return wfx_config_reg_write_bits(wdev, CFG_DIRECT_ACCESS_MODE | CFG_IRQ_ENABLE_DATA | CFG_IRQ_ENABLE_WRDY, CFG_IRQ_ENABLE_DATA); }
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