/* * DSPG DBMD2 SPI interface driver * * Copyright (C) 2014 DSP Group * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * 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 DEBUG */ #include #include #include #include #include #include #include #include #include #include #include "dbmdx-interface.h" #include "dbmdx-va-regmap.h" #include "dbmdx-vqe-regmap.h" #include "dbmdx-spi.h" #define DBMD2_MAX_SPI_BOOT_SPEED 8000000 static const u8 clr_crc[] = {0x5A, 0x03, 0x52, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; static const u8 chng_pll_cmd[] = {0x5A, 0x13, 0x3D, 0x10, 0x00, 0x00, 0x00, 0x16, 0x00, 0x10, 0xFF, 0xF1, 0x3F, 0x00}; static int dbmd2_spi_boot(const void *fw_data, size_t fw_size, struct dbmdx_private *p, const void *checksum, size_t chksum_len, int load_fw) { int retry = RETRY_COUNT; int ret = 0; ssize_t send_bytes; struct dbmdx_spi_private *spi_p = (struct dbmdx_spi_private *)p->chip->pdata; struct spi_device *spi = spi_p->client; u8 sbl_spi[] = { 0x5A, 0x04, 0x4c, 0x00, 0x00, 0x03, 0x11, 0x55, 0x05, 0x00}; dev_dbg(spi_p->dev, "%s\n", __func__); do { if (p->active_fw == DBMDX_FW_PRE_BOOT) { if (!(p->boot_mode & DBMDX_BOOT_MODE_RESET_DISABLED)) { /* reset DBMD2 chip */ p->reset_sequence(p); } else { /* If failed and reset is disabled, break */ if (retry != RETRY_COUNT) { retry = -1; break; } } /* delay before sending commands */ if (p->clk_get_rate(p, DBMDX_CLK_MASTER) <= 32768) msleep(DBMDX_MSLEEP_SPI_D2_AFTER_RESET_32K); else usleep_range(DBMDX_USLEEP_SPI_D2_AFTER_RESET, DBMDX_USLEEP_SPI_D2_AFTER_RESET + 5000); ret = spi_set_speed(p, DBMDX_VA_SPEED_MAX); if (ret < 0) { dev_err(spi_p->dev, "%s:failed %x\n", __func__, ret); continue; } if ((spi->max_speed_hz > DBMD2_MAX_SPI_BOOT_SPEED) && !(p->cur_boot_options & DBMDX_BOOT_OPT_DONT_SET_PLL)) { ret = spi_set_speed(p, DBMDX_VA_SPEED_NORMAL); if (ret < 0) { dev_err(spi_p->dev, "%s:failed %x\n", __func__, ret); continue; } /* send Change PLL clear command */ ret = send_spi_data(p, chng_pll_cmd, sizeof(chng_pll_cmd)); if (ret != sizeof(chng_pll_cmd)) { dev_err(p->dev, "%s: failed to change PLL\n", __func__); continue; } msleep(DBMDX_MSLEEP_SPI_D2_AFTER_PLL_CHANGE); ret = spi_set_speed(p, DBMDX_VA_SPEED_MAX); if (ret < 0) { dev_err(spi_p->dev, "%s:failed %x\n", __func__, ret); continue; } } if (!(p->cur_boot_options & DBMDX_BOOT_OPT_DONT_SENT_SBL)) { /* send SBL */ send_bytes = send_spi_data(p, sbl_spi, sizeof(sbl_spi)); if (send_bytes != sizeof(sbl_spi)) { dev_err(p->dev, "%s: -----------> load SBL error\n", __func__); continue; } usleep_range(DBMDX_USLEEP_SPI_D2_AFTER_SBL, DBMDX_USLEEP_SPI_D2_AFTER_SBL + 1000); } /* verify chip id */ if (p->cur_boot_options & DBMDX_BOOT_OPT_VERIFY_CHIP_ID) { ret = spi_verify_chip_id(p); if (ret < 0) { dev_err(spi_p->dev, "%s: couldn't verify chip id\n", __func__); continue; } } if (!(p->cur_boot_options & DBMDX_BOOT_OPT_DONT_CLR_CRC)) { /* send CRC clear command */ ret = send_spi_data(p, clr_crc, sizeof(clr_crc)); if (ret != sizeof(clr_crc)) { dev_err(p->dev, "%s: failed to clear CRC\n", __func__); continue; } } } else { /* delay before sending commands */ if (p->active_fw == DBMDX_FW_VQE) ret = send_spi_cmd_vqe(p, DBMDX_VQE_SET_SWITCH_TO_BOOT_CMD, NULL); else if (p->active_fw == DBMDX_FW_VA) ret = send_spi_cmd_va(p, DBMDX_VA_SWITCH_TO_BOOT, NULL); if (ret < 0) { dev_err(p->dev, "%s: failed to send 'Switch to BOOT' cmd\n", __func__); continue; } } if (!load_fw) break; /* send firmware */ send_bytes = send_spi_data(p, fw_data, fw_size - 4); if (send_bytes != fw_size - 4) { dev_err(p->dev, "%s: -----------> load firmware error\n", __func__); continue; } /* verify checksum */ if (checksum && !(p->cur_boot_options & DBMDX_BOOT_OPT_DONT_VERIFY_CRC)) { ret = spi_verify_boot_checksum(p, checksum, chksum_len); if (ret < 0) { dev_err(spi_p->dev, "%s: could not verify checksum\n", __func__); continue; } } dev_dbg(p->dev, "%s: ---------> firmware loaded\n", __func__); break; } while (--retry); /* no retries left, failed to boot */ if (retry <= 0) { dev_err(p->dev, "%s: failed to load firmware\n", __func__); return -EIO; } if (!(p->cur_boot_options & DBMDX_BOOT_OPT_DONT_SEND_START_BOOT)) { /* send boot command */ ret = send_spi_cmd_boot(p, DBMDX_FIRMWARE_BOOT); if (ret < 0) { dev_err(p->dev, "%s: booting the firmware failed\n", __func__); return -EIO; } } ret = spi_set_speed(p, DBMDX_VA_SPEED_NORMAL); if (ret < 0) dev_err(spi_p->dev, "%s:failed %x\n", __func__, ret); /* wait some time */ usleep_range(DBMDX_USLEEP_SPI_D2_AFTER_BOOT, DBMDX_USLEEP_SPI_D2_AFTER_BOOT + 1000); return 0; } #ifdef CONFIG_PM_SLEEP static int dbmdx_spi_suspend(struct device *dev) { struct chip_interface *ci = spi_get_drvdata(to_spi_device(dev)); struct dbmdx_spi_private *spi_p = (struct dbmdx_spi_private *)ci->pdata; dev_dbg(dev, "%s\n", __func__); spi_interface_suspend(spi_p); return 0; } static int dbmdx_spi_resume(struct device *dev) { struct chip_interface *ci = spi_get_drvdata(to_spi_device(dev)); struct dbmdx_spi_private *spi_p = (struct dbmdx_spi_private *)ci->pdata; dev_dbg(dev, "%s\n", __func__); spi_interface_resume(spi_p); return 0; } #else #define dbmdx_spi_suspend NULL #define dbmdx_spi_resume NULL #endif /* CONFIG_PM_SLEEP */ #ifdef CONFIG_PM static int dbmdx_spi_runtime_suspend(struct device *dev) { struct chip_interface *ci = spi_get_drvdata(to_spi_device(dev)); struct dbmdx_spi_private *spi_p = (struct dbmdx_spi_private *)ci->pdata; dev_dbg(dev, "%s\n", __func__); spi_interface_suspend(spi_p); return 0; } static int dbmdx_spi_runtime_resume(struct device *dev) { struct chip_interface *ci = spi_get_drvdata(to_spi_device(dev)); struct dbmdx_spi_private *spi_p = (struct dbmdx_spi_private *)ci->pdata; dev_dbg(dev, "%s\n", __func__); spi_interface_resume(spi_p); return 0; } #else #define dbmdx_spi_runtime_suspend NULL #define dbmdx_spi_runtime_resume NULL #endif /* CONFIG_PM */ static const struct dev_pm_ops dbmdx_spi_pm = { SET_SYSTEM_SLEEP_PM_OPS(dbmdx_spi_suspend, dbmdx_spi_resume) SET_RUNTIME_PM_OPS(dbmdx_spi_runtime_suspend, dbmdx_spi_runtime_resume, NULL) }; static int dbmd2_spi_probe(struct spi_device *client) { int rc; struct dbmdx_spi_private *p; struct chip_interface *ci; rc = spi_common_probe(client); if (rc < 0) return rc; ci = spi_get_drvdata(client); p = (struct dbmdx_spi_private *)ci->pdata; /* fill in chip interface functions */ p->chip.boot = dbmd2_spi_boot; return rc; } static const struct of_device_id dbmd2_spi_of_match[] = { { .compatible = "dspg,dbmd2-spi", }, {}, }; #ifdef CONFIG_SND_SOC_DBMDX MODULE_DEVICE_TABLE(of, dbmd2_spi_of_match); #endif static const struct spi_device_id dbmd2_spi_id[] = { { "dbmdx-spi", 0 }, { "dbmd2-spi", 0 }, { } }; MODULE_DEVICE_TABLE(spi, dbmd2_spi_id); static struct spi_driver dbmd2_spi_driver = { .driver = { .name = "dbmd2-spi", .bus = &spi_bus_type, .owner = THIS_MODULE, #ifdef CONFIG_OF .of_match_table = dbmd2_spi_of_match, #endif .pm = &dbmdx_spi_pm, }, .probe = dbmd2_spi_probe, .remove = spi_common_remove, .id_table = dbmd2_spi_id, }; #ifdef CONFIG_SND_SOC_DBMDX static int __init dbmd2_modinit(void) { return spi_register_driver(&dbmd2_spi_driver); } module_init(dbmd2_modinit); static void __exit dbmd2_exit(void) { spi_unregister_driver(&dbmd2_spi_driver); } module_exit(dbmd2_exit); #else int dbmd2_spi_init_interface(void) { spi_register_driver(&dbmd2_spi_driver); return 0; } void dbmd2_spi_deinit_interface(void) { spi_unregister_driver(&dbmd2_spi_driver); } int (*dbmdx_init_interface)(void) = &dbmd2_spi_init_interface; void (*dbmdx_deinit_interface)(void) = &dbmd2_spi_deinit_interface; #endif MODULE_DESCRIPTION("DSPG DBMD2 spi interface driver"); MODULE_LICENSE("GPL");