From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5976C2BA19 for ; Tue, 14 Apr 2020 16:42:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C4DB20737 for ; Tue, 14 Apr 2020 16:42:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586882554; bh=14+tW/Veg/Atm9kF6l7J9I5yOBVexWDix8y7C2rFrh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=u+hSpyLLRSMw7X2qPetmzCC4WmvPN2jmap4ujJw0CXaAL8yr4MMx0polI15LOP1Nb idvB1ZJ0ek3J19IU2YJCubKiE9qCX0pt976I+3t0wqVctrniSnV6QgzCa+8eQk1RDb DANxmXp6Jvmi/nYEMeHRO/Xnh6/AZl7kFmTnARTA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407458AbgDNQmc (ORCPT ); Tue, 14 Apr 2020 12:42:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:51644 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407446AbgDNQm2 (ORCPT ); Tue, 14 Apr 2020 12:42:28 -0400 Received: from localhost.localdomain (unknown [122.167.127.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 38B682076A; Tue, 14 Apr 2020 16:42:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586882546; bh=14+tW/Veg/Atm9kF6l7J9I5yOBVexWDix8y7C2rFrh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cMUzZ3HAS0rwJCDsZwgOz9+PXKroHgOnAPhC++cj78EGhw8RqYyK4b96oxSW93TS0 4wV9WlkyLGyASB6oJBRMYAXT5qIeHTqKHOm9BUem0gxLf9B2JTiP1qvbReqYYXxAJz 6kE8CH42w1Irs3LVdNRePY516M3VCuIzz7VosK1U= From: Vinod Koul To: Mathias Nyman , Greg Kroah-Hartman Cc: linux-arm-msm@vger.kernel.org, Bjorn Andersson , Vinod Koul , Yoshihiro Shimoda , Christian Lamparter , John Stultz , Alan Stern , =?UTF-8?q?Andreas=20B=C3=B6hler?= , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v9 4/5] usb: renesas-xhci: Add ROM loader for uPD720201 Date: Tue, 14 Apr 2020 22:11:51 +0530 Message-Id: <20200414164152.2786474-5-vkoul@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200414164152.2786474-1-vkoul@kernel.org> References: <20200414164152.2786474-1-vkoul@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org uPD720201 supports ROM and allows software to program the ROM and boot from it. Add support for detecting if ROM is present, if so load the ROM if not programmed earlier. Signed-off-by: Vinod Koul Cc: Yoshihiro Shimoda Cc: Christian Lamparter --- drivers/usb/host/xhci-pci-renesas.c | 342 +++++++++++++++++++++++++++- 1 file changed, 341 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci-pci-renesas.c b/drivers/usb/host/xhci-pci-renesas.c index 4be838b05f06..b321d55f1e24 100644 --- a/drivers/usb/host/xhci-pci-renesas.c +++ b/drivers/usb/host/xhci-pci-renesas.c @@ -50,6 +50,22 @@ #define RENESAS_RETRY 10000 #define RENESAS_DELAY 10 +#define ROM_VALID_01 0x2013 +#define ROM_VALID_02 0x2026 + +static int renesas_verify_fw_version(struct pci_dev *pdev, u32 version) +{ + switch (version) { + case ROM_VALID_01: + case ROM_VALID_02: + return 0; + default: + dev_err(&pdev->dev, "FW has invalid version :%d\n", version); + return 1; + } + return -EINVAL; +} + static int renesas_fw_download_image(struct pci_dev *dev, const u32 *fw, size_t step) @@ -144,10 +160,84 @@ static int renesas_fw_verify(const void *fw_data, return 0; } -static int renesas_fw_check_running(struct pci_dev *pdev) +static bool renesas_check_rom(struct pci_dev *pdev) { + u16 rom_status; + int retval; + + /* Check if external ROM exists */ + retval = pci_read_config_word(pdev, RENESAS_ROM_STATUS, &rom_status); + if (retval) + return false; + + rom_status &= RENESAS_ROM_STATUS_ROM_EXISTS; + if (rom_status) { + dev_dbg(&pdev->dev, "External ROM exists\n"); + return true; /* External ROM exists */ + } + + return false; +} + +static int renesas_check_rom_state(struct pci_dev *pdev) +{ + u16 rom_state; + u32 version; int err; + + /* check FW version */ + err = pci_read_config_dword(pdev, RENESAS_FW_VERSION, &version); + if (err) + return pcibios_err_to_errno(err); + + version &= RENESAS_FW_VERSION_FIELD; + version = version >> RENESAS_FW_VERSION_OFFSET; + + err = renesas_verify_fw_version(pdev, version); + if (err) + return err; + + /* + * Test if ROM is present and loaded, if so we can skip everything + */ + err = pci_read_config_word(pdev, RENESAS_ROM_STATUS, &rom_state); + if (err) + return pcibios_err_to_errno(err); + + if (rom_state & BIT(15)) { + /* ROM exists */ + dev_dbg(&pdev->dev, "ROM exists\n"); + + /* Check the "Result Code" Bits (6:4) and act accordingly */ + switch (rom_state & RENESAS_ROM_STATUS_RESULT) { + case RENESAS_ROM_STATUS_SUCCESS: + return 0; + + case RENESAS_ROM_STATUS_NO_RESULT: /* No result yet */ + return 0; + + case RENESAS_ROM_STATUS_ERROR: /* Error State */ + default: /* All other states are marked as "Reserved states" */ + dev_err(&pdev->dev, "Invalid ROM.."); + break; + } + } + + return -EIO; +} + +static int renesas_fw_check_running(struct pci_dev *pdev) +{ u8 fw_state; + int err; + + /* Check if device has ROM and loaded, if so skip everything */ + err = renesas_check_rom(pdev); + if (err) { /* we have rom */ + err = renesas_check_rom_state(pdev); + if (!err) + return err; + } /* * Test if the device is actually needing the firmware. As most @@ -303,11 +393,261 @@ static int renesas_fw_download(struct pci_dev *pdev, return 0; } +static void renesas_rom_erase(struct pci_dev *pdev) +{ + int retval, i; + u8 status; + + dev_dbg(&pdev->dev, "Performing ROM Erase...\n"); + retval = pci_write_config_dword(pdev, RENESAS_DATA0, + RENESAS_ROM_ERASE_MAGIC); + if (retval) { + dev_err(&pdev->dev, "ROM erase, magic word write failed: %d\n", + pcibios_err_to_errno(retval)); + return; + } + + retval = pci_read_config_byte(pdev, RENESAS_ROM_STATUS, &status); + if (retval) { + dev_err(&pdev->dev, "ROM status read failed: %d\n", + pcibios_err_to_errno(retval)); + return; + } + status |= RENESAS_ROM_STATUS_ERASE; + retval = pci_write_config_byte(pdev, RENESAS_ROM_STATUS, status); + if (retval) { + dev_err(&pdev->dev, "ROM erase set word write failed\n"); + return; + } + + /* sleep a bit while ROM is erased */ + msleep(20); + + for (i = 0; i < RENESAS_RETRY; i++) { + retval = pci_read_config_byte(pdev, RENESAS_ROM_STATUS, + &status); + status &= RENESAS_ROM_STATUS_ERASE; + if (!status) + break; + + mdelay(RENESAS_DELAY); + } + + if (i == RENESAS_RETRY) + dev_dbg(&pdev->dev, "Chip erase timedout: %x\n", status); + + dev_dbg(&pdev->dev, "ROM Erase... Done success\n"); +} + +static bool renesas_download_rom(struct pci_dev *pdev, + const u32 *fw, size_t step) +{ + bool data0_or_data1; + u8 fw_status; + size_t i; + int err; + + /* + * The hardware does alternate between two 32-bit pages. + * (This is because each row of the firmware is 8 bytes). + * + * for even steps we use DATA0, for odd steps DATA1. + */ + data0_or_data1 = (step & 1) == 1; + + /* Read "Set DATAX" and confirm it is cleared. */ + for (i = 0; i < RENESAS_RETRY; i++) { + err = pci_read_config_byte(pdev, RENESAS_ROM_STATUS_MSB, + &fw_status); + if (err) { + dev_err(&pdev->dev, "Read ROM Status failed: %d\n", + pcibios_err_to_errno(err)); + return false; + } + if (!(fw_status & BIT(data0_or_data1))) + break; + + udelay(RENESAS_DELAY); + } + if (i == RENESAS_RETRY) { + dev_err(&pdev->dev, "Timeout for Set DATAX step: %zd\n", step); + return false; + } + + /* + * Write FW data to "DATAX". + * "LSB is left" => force little endian + */ + err = pci_write_config_dword(pdev, data0_or_data1 ? + RENESAS_DATA1 : RENESAS_DATA0, + (__force u32)cpu_to_le32(fw[step])); + if (err) { + dev_err(&pdev->dev, "Write to DATAX failed: %d\n", + pcibios_err_to_errno(err)); + return false; + } + + udelay(100); + + /* Set "Set DATAX". */ + err = pci_write_config_byte(pdev, RENESAS_ROM_STATUS_MSB, + BIT(data0_or_data1)); + if (err) { + dev_err(&pdev->dev, "Write config for DATAX failed: %d\n", + pcibios_err_to_errno(err)); + return false; + } + + return true; +} + +static bool renesas_setup_rom(struct pci_dev *pdev, const struct firmware *fw) +{ + const u32 *fw_data = (const u32 *)fw->data; + int err, i; + u8 status; + + /* 2. Write magic word to Data0 */ + err = pci_write_config_dword(pdev, RENESAS_DATA0, + RENESAS_ROM_WRITE_MAGIC); + if (err) + return false; + + /* 3. Set External ROM access */ + err = pci_write_config_byte(pdev, RENESAS_ROM_STATUS, + RENESAS_ROM_STATUS_ACCESS); + if (err) + goto remove_bypass; + + /* 4. Check the result */ + err = pci_read_config_byte(pdev, RENESAS_ROM_STATUS, &status); + if (err) + goto remove_bypass; + status &= GENMASK(6, 4); + if (status) { + dev_err(&pdev->dev, + "setting external rom failed: %x\n", status); + goto remove_bypass; + } + + /* 5 to 16 Write FW to DATA0/1 while checking SetData0/1 */ + for (i = 0; i < fw->size / 4; i++) { + err = renesas_download_rom(pdev, fw_data, i); + if (!err) { + dev_err(&pdev->dev, + "ROM Download Step %d failed at position %d bytes\n", + i, i * 4); + goto remove_bypass; + } + } + + /* + * wait till DATA0/1 is cleared + */ + for (i = 0; i < RENESAS_RETRY; i++) { + err = pci_read_config_byte(pdev, RENESAS_ROM_STATUS_MSB, + &status); + if (err) + goto remove_bypass; + if (!(status & (BIT(0) | BIT(1)))) + break; + + udelay(RENESAS_DELAY); + } + if (i == RENESAS_RETRY) { + dev_err(&pdev->dev, "Final Firmware ROM Download step timed out\n"); + goto remove_bypass; + } + + /* 17. Remove bypass */ + err = pci_write_config_byte(pdev, RENESAS_ROM_STATUS, 0); + if (err) + return false; + + udelay(10); + + /* 18. check result */ + for (i = 0; i < RENESAS_RETRY; i++) { + err = pci_read_config_byte(pdev, RENESAS_ROM_STATUS, &status); + if (err) { + dev_err(&pdev->dev, "Read ROM status failed:%d\n", + pcibios_err_to_errno(err)); + return false; + } + status &= RENESAS_ROM_STATUS_RESULT; + if (status == RENESAS_ROM_STATUS_SUCCESS) { + dev_dbg(&pdev->dev, "Download ROM success\n"); + break; + } + udelay(RENESAS_DELAY); + } + if (i == RENESAS_RETRY) { /* Timed out */ + dev_err(&pdev->dev, + "Download to external ROM TO: %x\n", status); + return false; + } + + dev_dbg(&pdev->dev, "Download to external ROM succeeded\n"); + + /* Last step set Reload */ + err = pci_write_config_byte(pdev, RENESAS_ROM_STATUS, + RENESAS_ROM_STATUS_RELOAD); + if (err) { + dev_err(&pdev->dev, "Set ROM execute failed: %d\n", + pcibios_err_to_errno(err)); + return false; + } + + /* + * wait till Reload is cleared + */ + for (i = 0; i < RENESAS_RETRY; i++) { + err = pci_read_config_byte(pdev, RENESAS_ROM_STATUS, &status); + if (err) + return false; + if (!(status & RENESAS_ROM_STATUS_RELOAD)) + break; + + udelay(RENESAS_DELAY); + } + if (i == RENESAS_RETRY) { + dev_err(&pdev->dev, "ROM Exec timed out: %x\n", status); + return false; + } + + return true; + +remove_bypass: + pci_write_config_byte(pdev, RENESAS_ROM_STATUS, 0); + return false; +} + static int renesas_load_fw(struct pci_dev *pdev, const struct firmware *fw) { int err = 0; + bool rom; + + /* Check if the device has external ROM */ + rom = renesas_check_rom(pdev); + if (rom) { + /* perform chip erase first */ + renesas_rom_erase(pdev); + + /* lets try loading fw on ROM first */ + rom = renesas_setup_rom(pdev, fw); + if (!rom) { + dev_dbg(&pdev->dev, + "ROM load failed, falling back on FW load\n"); + } else { + dev_dbg(&pdev->dev, + "ROM load success\n"); + goto exit; + } + } err = renesas_fw_download(pdev, fw); + +exit: if (err) dev_dbg(&pdev->dev, "firmware failed to download (%d).", err); return err; -- 2.25.1