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SPI-NOR core changes:
- add support for the mt25ql02g and w25q16jv flashes - print error in case of jedec read id fails - is25lp256: add post BFPT fix to correct the addr_width SPI NOR controller drivers changes: - intel-spi: Add support for Intel Elkhart Lake SPI serial flash - smt32: remove the driver as the driver was replaced by spi-stm32-qspi.c - cadence-quadspi: add reset control -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEHUIqys8OyG1eHf7fS1VPR6WNFOkFAl0V1XYACgkQS1VPR6WN FOkBbQf+Iv2+vmoDGDCVGO4LZh+N/l0Sh/C31hJj5y7GVkCdwMJCvdOrGEhDkseu Dc0gchT6uy52pAp4N0B88avC8fSJY0UwFRbnqUUA546R9Uf6h+gbGIZCX/rzZuIi IDDNHc06qbpxpesfC5CowhY49QVGG+O0scgUOE2gKHOfd04kXu6gqIV0BvQZg80R EpSgifHLUk/b2015FyqB5YFuc2K3HMmcWc6uJx4kSHPCXiCOx8aaEqjKvK9vL0h5 XOxXim5HhuzFqQ8vSPqvnKDokkuV3pcSUcaQyjQjrebTlectaDjGZlLF17Udm9Q9 I0zI+7deXK9L4roatEryzOdW0Ql3Hw== =J5Uw -----END PGP SIGNATURE----- Merge tag 'spi-nor/for-5.3-v2' of gitolite.kernel.org:pub/scm/linux/kernel/git/mtd/linux into mtd/next SPI-NOR core changes: - add support for the mt25ql02g and w25q16jv flashes - print error in case of jedec read id fails - is25lp256: add post BFPT fix to correct the addr_width SPI NOR controller drivers changes: - intel-spi: Add support for Intel Elkhart Lake SPI serial flash - smt32: remove the driver as the driver was replaced by spi-stm32-qspi.c - cadence-quadspi: add reset control
This commit is contained in:
Miquel Raynal
commit
46ce10df79
@ -35,6 +35,9 @@ custom properties:
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(qspi_n_ss_out).
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- cdns,tslch-ns : Delay in nanoseconds between setting qspi_n_ss_out low
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and first bit transfer.
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- resets : Must contain an entry for each entry in reset-names.
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See ../reset/reset.txt for details.
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- reset-names : Must include either "qspi" and/or "qspi-ocp".
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Example:
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@ -50,6 +53,8 @@ Example:
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cdns,fifo-depth = <128>;
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cdns,fifo-width = <4>;
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cdns,trigger-address = <0x00000000>;
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resets = <&rst QSPI_RESET>, <&rst QSPI_OCP_RESET>;
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reset-names = "qspi", "qspi-ocp";
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flash0: n25q00@0 {
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...
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@ -1,43 +0,0 @@
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* STMicroelectronics Quad Serial Peripheral Interface(QuadSPI)
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Required properties:
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- compatible: should be "st,stm32f469-qspi"
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- reg: the first contains the register location and length.
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the second contains the memory mapping address and length
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- reg-names: should contain the reg names "qspi" "qspi_mm"
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- interrupts: should contain the interrupt for the device
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- clocks: the phandle of the clock needed by the QSPI controller
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- A pinctrl must be defined to set pins in mode of operation for QSPI transfer
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Optional properties:
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- resets: must contain the phandle to the reset controller.
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A spi flash must be a child of the nor_flash node and could have some
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properties. Also see jedec,spi-nor.txt.
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Required properties:
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- reg: chip-Select number (QSPI controller may connect 2 nor flashes)
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- spi-max-frequency: max frequency of spi bus
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Optional property:
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- spi-rx-bus-width: see ../spi/spi-bus.txt for the description
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Example:
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qspi: spi@a0001000 {
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compatible = "st,stm32f469-qspi";
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reg = <0xa0001000 0x1000>, <0x90000000 0x10000000>;
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reg-names = "qspi", "qspi_mm";
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interrupts = <91>;
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resets = <&rcc STM32F4_AHB3_RESET(QSPI)>;
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clocks = <&rcc 0 STM32F4_AHB3_CLOCK(QSPI)>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_qspi0>;
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flash@0 {
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reg = <0>;
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spi-rx-bus-width = <4>;
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spi-max-frequency = <108000000>;
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...
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};
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};
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@ -105,11 +105,4 @@ config SPI_INTEL_SPI_PLATFORM
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To compile this driver as a module, choose M here: the module
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will be called intel-spi-platform.
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config SPI_STM32_QUADSPI
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tristate "STM32 Quad SPI controller"
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depends on ARCH_STM32 || COMPILE_TEST
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help
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This enables support for the STM32 Quad SPI controller.
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We only connect the NOR to this controller.
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endif # MTD_SPI_NOR
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@ -8,4 +8,3 @@ obj-$(CONFIG_SPI_NXP_SPIFI) += nxp-spifi.o
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obj-$(CONFIG_SPI_INTEL_SPI) += intel-spi.o
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obj-$(CONFIG_SPI_INTEL_SPI_PCI) += intel-spi-pci.o
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obj-$(CONFIG_SPI_INTEL_SPI_PLATFORM) += intel-spi-platform.o
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obj-$(CONFIG_SPI_STM32_QUADSPI) += stm32-quadspi.o
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@ -23,6 +23,7 @@
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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#include <linux/sched.h>
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#include <linux/spi/spi.h>
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#include <linux/timer.h>
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@ -1325,6 +1326,7 @@ static int cqspi_probe(struct platform_device *pdev)
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struct cqspi_st *cqspi;
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struct resource *res;
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struct resource *res_ahb;
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struct reset_control *rstc, *rstc_ocp;
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const struct cqspi_driver_platdata *ddata;
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int ret;
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int irq;
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@ -1391,6 +1393,25 @@ static int cqspi_probe(struct platform_device *pdev)
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goto probe_clk_failed;
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}
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/* Obtain QSPI reset control */
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rstc = devm_reset_control_get_optional_exclusive(dev, "qspi");
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if (IS_ERR(rstc)) {
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dev_err(dev, "Cannot get QSPI reset.\n");
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return PTR_ERR(rstc);
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}
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rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp");
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if (IS_ERR(rstc_ocp)) {
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dev_err(dev, "Cannot get QSPI OCP reset.\n");
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return PTR_ERR(rstc_ocp);
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}
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reset_control_assert(rstc);
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reset_control_deassert(rstc);
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reset_control_assert(rstc_ocp);
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reset_control_deassert(rstc_ocp);
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cqspi->master_ref_clk_hz = clk_get_rate(cqspi->clk);
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ddata = of_device_get_match_data(dev);
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if (ddata && (ddata->quirks & CQSPI_NEEDS_WR_DELAY))
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@ -1,12 +1,9 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Intel PCH/PCU SPI flash PCI driver.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/ioport.h>
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@ -67,6 +64,7 @@ static const struct pci_device_id intel_spi_pci_ids[] = {
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{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
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{ },
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@ -1,12 +1,9 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Intel PCH/PCU SPI flash platform driver.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/ioport.h>
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@ -1,12 +1,9 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Intel PCH/PCU SPI flash driver.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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@ -1,12 +1,9 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Intel PCH/PCU SPI flash driver.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef INTEL_SPI_H
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@ -200,7 +200,7 @@ struct sfdp_header {
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* register does not modify status register 2.
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* - 101b: QE is bit 1 of status register 2. Status register 1 is read using
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* Read Status instruction 05h. Status register2 is read using
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* instruction 35h. QE is set via Writ Status instruction 01h with
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* instruction 35h. QE is set via Write Status instruction 01h with
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* two data bytes where bit 1 of the second byte is one.
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* [...]
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*/
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@ -1686,6 +1686,28 @@ static int sr2_bit7_quad_enable(struct spi_nor *nor)
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.addr_width = 3, \
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.flags = SPI_NOR_NO_FR | SPI_S3AN,
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static int
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is25lp256_post_bfpt_fixups(struct spi_nor *nor,
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const struct sfdp_parameter_header *bfpt_header,
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const struct sfdp_bfpt *bfpt,
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struct spi_nor_flash_parameter *params)
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{
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/*
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* IS25LP256 supports 4B opcodes, but the BFPT advertises a
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* BFPT_DWORD1_ADDRESS_BYTES_3_ONLY address width.
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* Overwrite the address width advertised by the BFPT.
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*/
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if ((bfpt->dwords[BFPT_DWORD(1)] & BFPT_DWORD1_ADDRESS_BYTES_MASK) ==
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BFPT_DWORD1_ADDRESS_BYTES_3_ONLY)
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nor->addr_width = 4;
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return 0;
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}
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static struct spi_nor_fixups is25lp256_fixups = {
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.post_bfpt = is25lp256_post_bfpt_fixups,
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};
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static int
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mx25l25635_post_bfpt_fixups(struct spi_nor *nor,
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const struct sfdp_parameter_header *bfpt_header,
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@ -1827,7 +1849,8 @@ static const struct flash_info spi_nor_ids[] = {
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SECT_4K | SPI_NOR_DUAL_READ) },
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{ "is25lp256", INFO(0x9d6019, 0, 64 * 1024, 512,
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SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
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SPI_NOR_4B_OPCODES) },
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SPI_NOR_4B_OPCODES)
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.fixups = &is25lp256_fixups },
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{ "is25wp032", INFO(0x9d7016, 0, 64 * 1024, 64,
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SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
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{ "is25wp064", INFO(0x9d7017, 0, 64 * 1024, 128,
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@ -1880,6 +1903,9 @@ static const struct flash_info spi_nor_ids[] = {
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{ "n25q512ax3", INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
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{ "n25q00", INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
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{ "n25q00a", INFO(0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
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{ "mt25ql02g", INFO(0x20ba22, 0, 64 * 1024, 4096,
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SECT_4K | USE_FSR | SPI_NOR_QUAD_READ |
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NO_CHIP_ERASE) },
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{ "mt25qu02g", INFO(0x20bb22, 0, 64 * 1024, 4096, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
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/* Micron */
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@ -1996,6 +2022,11 @@ static const struct flash_info spi_nor_ids[] = {
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SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
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},
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{ "w25x32", INFO(0xef3016, 0, 64 * 1024, 64, SECT_4K) },
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{
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"w25q16jv-im/jm", INFO(0xef7015, 0, 64 * 1024, 32,
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SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
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SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
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},
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{ "w25q20cl", INFO(0xef4012, 0, 64 * 1024, 4, SECT_4K) },
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{ "w25q20bw", INFO(0xef5012, 0, 64 * 1024, 4, SECT_4K) },
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{ "w25q20ew", INFO(0xef6012, 0, 64 * 1024, 4, SECT_4K) },
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@ -2062,7 +2093,7 @@ static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
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tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
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if (tmp < 0) {
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dev_dbg(nor->dev, "error %d reading JEDEC ID\n", tmp);
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dev_err(nor->dev, "error %d reading JEDEC ID\n", tmp);
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return ERR_PTR(tmp);
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}
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@ -1,720 +0,0 @@
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/*
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* Driver for stm32 quadspi controller
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*
|
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
|
||||
* Author(s): Ludovic Barre author <ludovic.barre@st.com>.
|
||||
*
|
||||
* License terms: GPL V2.0.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License version 2 as published by
|
||||
* the Free Software Foundation.
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along with
|
||||
* This program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
#include <linux/clk.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/iopoll.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/mtd/mtd.h>
|
||||
#include <linux/mtd/partitions.h>
|
||||
#include <linux/mtd/spi-nor.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/reset.h>
|
||||
#include <linux/sizes.h>
|
||||
|
||||
#define QUADSPI_CR 0x00
|
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#define CR_EN BIT(0)
|
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#define CR_ABORT BIT(1)
|
||||
#define CR_DMAEN BIT(2)
|
||||
#define CR_TCEN BIT(3)
|
||||
#define CR_SSHIFT BIT(4)
|
||||
#define CR_DFM BIT(6)
|
||||
#define CR_FSEL BIT(7)
|
||||
#define CR_FTHRES_SHIFT 8
|
||||
#define CR_FTHRES_MASK GENMASK(12, 8)
|
||||
#define CR_FTHRES(n) (((n) << CR_FTHRES_SHIFT) & CR_FTHRES_MASK)
|
||||
#define CR_TEIE BIT(16)
|
||||
#define CR_TCIE BIT(17)
|
||||
#define CR_FTIE BIT(18)
|
||||
#define CR_SMIE BIT(19)
|
||||
#define CR_TOIE BIT(20)
|
||||
#define CR_PRESC_SHIFT 24
|
||||
#define CR_PRESC_MASK GENMASK(31, 24)
|
||||
#define CR_PRESC(n) (((n) << CR_PRESC_SHIFT) & CR_PRESC_MASK)
|
||||
|
||||
#define QUADSPI_DCR 0x04
|
||||
#define DCR_CSHT_SHIFT 8
|
||||
#define DCR_CSHT_MASK GENMASK(10, 8)
|
||||
#define DCR_CSHT(n) (((n) << DCR_CSHT_SHIFT) & DCR_CSHT_MASK)
|
||||
#define DCR_FSIZE_SHIFT 16
|
||||
#define DCR_FSIZE_MASK GENMASK(20, 16)
|
||||
#define DCR_FSIZE(n) (((n) << DCR_FSIZE_SHIFT) & DCR_FSIZE_MASK)
|
||||
|
||||
#define QUADSPI_SR 0x08
|
||||
#define SR_TEF BIT(0)
|
||||
#define SR_TCF BIT(1)
|
||||
#define SR_FTF BIT(2)
|
||||
#define SR_SMF BIT(3)
|
||||
#define SR_TOF BIT(4)
|
||||
#define SR_BUSY BIT(5)
|
||||
#define SR_FLEVEL_SHIFT 8
|
||||
#define SR_FLEVEL_MASK GENMASK(13, 8)
|
||||
|
||||
#define QUADSPI_FCR 0x0c
|
||||
#define FCR_CTCF BIT(1)
|
||||
|
||||
#define QUADSPI_DLR 0x10
|
||||
|
||||
#define QUADSPI_CCR 0x14
|
||||
#define CCR_INST_SHIFT 0
|
||||
#define CCR_INST_MASK GENMASK(7, 0)
|
||||
#define CCR_INST(n) (((n) << CCR_INST_SHIFT) & CCR_INST_MASK)
|
||||
#define CCR_IMODE_NONE (0U << 8)
|
||||
#define CCR_IMODE_1 (1U << 8)
|
||||
#define CCR_IMODE_2 (2U << 8)
|
||||
#define CCR_IMODE_4 (3U << 8)
|
||||
#define CCR_ADMODE_NONE (0U << 10)
|
||||
#define CCR_ADMODE_1 (1U << 10)
|
||||
#define CCR_ADMODE_2 (2U << 10)
|
||||
#define CCR_ADMODE_4 (3U << 10)
|
||||
#define CCR_ADSIZE_SHIFT 12
|
||||
#define CCR_ADSIZE_MASK GENMASK(13, 12)
|
||||
#define CCR_ADSIZE(n) (((n) << CCR_ADSIZE_SHIFT) & CCR_ADSIZE_MASK)
|
||||
#define CCR_ABMODE_NONE (0U << 14)
|
||||
#define CCR_ABMODE_1 (1U << 14)
|
||||
#define CCR_ABMODE_2 (2U << 14)
|
||||
#define CCR_ABMODE_4 (3U << 14)
|
||||
#define CCR_ABSIZE_8 (0U << 16)
|
||||
#define CCR_ABSIZE_16 (1U << 16)
|
||||
#define CCR_ABSIZE_24 (2U << 16)
|
||||
#define CCR_ABSIZE_32 (3U << 16)
|
||||
#define CCR_DCYC_SHIFT 18
|
||||
#define CCR_DCYC_MASK GENMASK(22, 18)
|
||||
#define CCR_DCYC(n) (((n) << CCR_DCYC_SHIFT) & CCR_DCYC_MASK)
|
||||
#define CCR_DMODE_NONE (0U << 24)
|
||||
#define CCR_DMODE_1 (1U << 24)
|
||||
#define CCR_DMODE_2 (2U << 24)
|
||||
#define CCR_DMODE_4 (3U << 24)
|
||||
#define CCR_FMODE_INDW (0U << 26)
|
||||
#define CCR_FMODE_INDR (1U << 26)
|
||||
#define CCR_FMODE_APM (2U << 26)
|
||||
#define CCR_FMODE_MM (3U << 26)
|
||||
|
||||
#define QUADSPI_AR 0x18
|
||||
#define QUADSPI_ABR 0x1c
|
||||
#define QUADSPI_DR 0x20
|
||||
#define QUADSPI_PSMKR 0x24
|
||||
#define QUADSPI_PSMAR 0x28
|
||||
#define QUADSPI_PIR 0x2c
|
||||
#define QUADSPI_LPTR 0x30
|
||||
#define LPTR_DFT_TIMEOUT 0x10
|
||||
|
||||
#define FSIZE_VAL(size) (__fls(size) - 1)
|
||||
|
||||
#define STM32_MAX_MMAP_SZ SZ_256M
|
||||
#define STM32_MAX_NORCHIP 2
|
||||
|
||||
#define STM32_QSPI_FIFO_SZ 32
|
||||
#define STM32_QSPI_FIFO_TIMEOUT_US 30000
|
||||
#define STM32_QSPI_BUSY_TIMEOUT_US 100000
|
||||
|
||||
struct stm32_qspi_flash {
|
||||
struct spi_nor nor;
|
||||
struct stm32_qspi *qspi;
|
||||
u32 cs;
|
||||
u32 fsize;
|
||||
u32 presc;
|
||||
u32 read_mode;
|
||||
bool registered;
|
||||
u32 prefetch_limit;
|
||||
};
|
||||
|
||||
struct stm32_qspi {
|
||||
struct device *dev;
|
||||
void __iomem *io_base;
|
||||
void __iomem *mm_base;
|
||||
resource_size_t mm_size;
|
||||
u32 nor_num;
|
||||
struct clk *clk;
|
||||
u32 clk_rate;
|
||||
struct stm32_qspi_flash flash[STM32_MAX_NORCHIP];
|
||||
struct completion cmd_completion;
|
||||
|
||||
/*
|
||||
* to protect device configuration, could be different between
|
||||
* 2 flash access (bk1, bk2)
|
||||
*/
|
||||
struct mutex lock;
|
||||
};
|
||||
|
||||
struct stm32_qspi_cmd {
|
||||
u8 addr_width;
|
||||
u8 dummy;
|
||||
bool tx_data;
|
||||
u8 opcode;
|
||||
u32 framemode;
|
||||
u32 qspimode;
|
||||
u32 addr;
|
||||
size_t len;
|
||||
void *buf;
|
||||
};
|
||||
|
||||
static int stm32_qspi_wait_cmd(struct stm32_qspi *qspi)
|
||||
{
|
||||
u32 cr;
|
||||
int err = 0;
|
||||
|
||||
if (readl_relaxed(qspi->io_base + QUADSPI_SR) & SR_TCF)
|
||||
return 0;
|
||||
|
||||
reinit_completion(&qspi->cmd_completion);
|
||||
cr = readl_relaxed(qspi->io_base + QUADSPI_CR);
|
||||
writel_relaxed(cr | CR_TCIE, qspi->io_base + QUADSPI_CR);
|
||||
|
||||
if (!wait_for_completion_interruptible_timeout(&qspi->cmd_completion,
|
||||
msecs_to_jiffies(1000)))
|
||||
err = -ETIMEDOUT;
|
||||
|
||||
writel_relaxed(cr, qspi->io_base + QUADSPI_CR);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int stm32_qspi_wait_nobusy(struct stm32_qspi *qspi)
|
||||
{
|
||||
u32 sr;
|
||||
|
||||
return readl_relaxed_poll_timeout(qspi->io_base + QUADSPI_SR, sr,
|
||||
!(sr & SR_BUSY), 10,
|
||||
STM32_QSPI_BUSY_TIMEOUT_US);
|
||||
}
|
||||
|
||||
static void stm32_qspi_set_framemode(struct spi_nor *nor,
|
||||
struct stm32_qspi_cmd *cmd, bool read)
|
||||
{
|
||||
u32 dmode = CCR_DMODE_1;
|
||||
|
||||
cmd->framemode = CCR_IMODE_1;
|
||||
|
||||
if (read) {
|
||||
switch (nor->read_proto) {
|
||||
default:
|
||||
case SNOR_PROTO_1_1_1:
|
||||
dmode = CCR_DMODE_1;
|
||||
break;
|
||||
case SNOR_PROTO_1_1_2:
|
||||
dmode = CCR_DMODE_2;
|
||||
break;
|
||||
case SNOR_PROTO_1_1_4:
|
||||
dmode = CCR_DMODE_4;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
cmd->framemode |= cmd->tx_data ? dmode : 0;
|
||||
cmd->framemode |= cmd->addr_width ? CCR_ADMODE_1 : 0;
|
||||
}
|
||||
|
||||
static void stm32_qspi_read_fifo(u8 *val, void __iomem *addr)
|
||||
{
|
||||
*val = readb_relaxed(addr);
|
||||
}
|
||||
|
||||
static void stm32_qspi_write_fifo(u8 *val, void __iomem *addr)
|
||||
{
|
||||
writeb_relaxed(*val, addr);
|
||||
}
|
||||
|
||||
static int stm32_qspi_tx_poll(struct stm32_qspi *qspi,
|
||||
const struct stm32_qspi_cmd *cmd)
|
||||
{
|
||||
void (*tx_fifo)(u8 *, void __iomem *);
|
||||
u32 len = cmd->len, sr;
|
||||
u8 *buf = cmd->buf;
|
||||
int ret;
|
||||
|
||||
if (cmd->qspimode == CCR_FMODE_INDW)
|
||||
tx_fifo = stm32_qspi_write_fifo;
|
||||
else
|
||||
tx_fifo = stm32_qspi_read_fifo;
|
||||
|
||||
while (len--) {
|
||||
ret = readl_relaxed_poll_timeout(qspi->io_base + QUADSPI_SR,
|
||||
sr, (sr & SR_FTF), 10,
|
||||
STM32_QSPI_FIFO_TIMEOUT_US);
|
||||
if (ret) {
|
||||
dev_err(qspi->dev, "fifo timeout (stat:%#x)\n", sr);
|
||||
return ret;
|
||||
}
|
||||
tx_fifo(buf++, qspi->io_base + QUADSPI_DR);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_qspi_tx_mm(struct stm32_qspi *qspi,
|
||||
const struct stm32_qspi_cmd *cmd)
|
||||
{
|
||||
memcpy_fromio(cmd->buf, qspi->mm_base + cmd->addr, cmd->len);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_qspi_tx(struct stm32_qspi *qspi,
|
||||
const struct stm32_qspi_cmd *cmd)
|
||||
{
|
||||
if (!cmd->tx_data)
|
||||
return 0;
|
||||
|
||||
if (cmd->qspimode == CCR_FMODE_MM)
|
||||
return stm32_qspi_tx_mm(qspi, cmd);
|
||||
|
||||
return stm32_qspi_tx_poll(qspi, cmd);
|
||||
}
|
||||
|
||||
static int stm32_qspi_send(struct stm32_qspi_flash *flash,
|
||||
const struct stm32_qspi_cmd *cmd)
|
||||
{
|
||||
struct stm32_qspi *qspi = flash->qspi;
|
||||
u32 ccr, dcr, cr;
|
||||
u32 last_byte;
|
||||
int err;
|
||||
|
||||
err = stm32_qspi_wait_nobusy(qspi);
|
||||
if (err)
|
||||
goto abort;
|
||||
|
||||
dcr = readl_relaxed(qspi->io_base + QUADSPI_DCR) & ~DCR_FSIZE_MASK;
|
||||
dcr |= DCR_FSIZE(flash->fsize);
|
||||
writel_relaxed(dcr, qspi->io_base + QUADSPI_DCR);
|
||||
|
||||
cr = readl_relaxed(qspi->io_base + QUADSPI_CR);
|
||||
cr &= ~CR_PRESC_MASK & ~CR_FSEL;
|
||||
cr |= CR_PRESC(flash->presc);
|
||||
cr |= flash->cs ? CR_FSEL : 0;
|
||||
writel_relaxed(cr, qspi->io_base + QUADSPI_CR);
|
||||
|
||||
if (cmd->tx_data)
|
||||
writel_relaxed(cmd->len - 1, qspi->io_base + QUADSPI_DLR);
|
||||
|
||||
ccr = cmd->framemode | cmd->qspimode;
|
||||
|
||||
if (cmd->dummy)
|
||||
ccr |= CCR_DCYC(cmd->dummy);
|
||||
|
||||
if (cmd->addr_width)
|
||||
ccr |= CCR_ADSIZE(cmd->addr_width - 1);
|
||||
|
||||
ccr |= CCR_INST(cmd->opcode);
|
||||
writel_relaxed(ccr, qspi->io_base + QUADSPI_CCR);
|
||||
|
||||
if (cmd->addr_width && cmd->qspimode != CCR_FMODE_MM)
|
||||
writel_relaxed(cmd->addr, qspi->io_base + QUADSPI_AR);
|
||||
|
||||
err = stm32_qspi_tx(qspi, cmd);
|
||||
if (err)
|
||||
goto abort;
|
||||
|
||||
if (cmd->qspimode != CCR_FMODE_MM) {
|
||||
err = stm32_qspi_wait_cmd(qspi);
|
||||
if (err)
|
||||
goto abort;
|
||||
writel_relaxed(FCR_CTCF, qspi->io_base + QUADSPI_FCR);
|
||||
} else {
|
||||
last_byte = cmd->addr + cmd->len;
|
||||
if (last_byte > flash->prefetch_limit)
|
||||
goto abort;
|
||||
}
|
||||
|
||||
return err;
|
||||
|
||||
abort:
|
||||
cr = readl_relaxed(qspi->io_base + QUADSPI_CR) | CR_ABORT;
|
||||
writel_relaxed(cr, qspi->io_base + QUADSPI_CR);
|
||||
|
||||
if (err)
|
||||
dev_err(qspi->dev, "%s abort err:%d\n", __func__, err);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int stm32_qspi_read_reg(struct spi_nor *nor,
|
||||
u8 opcode, u8 *buf, int len)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct device *dev = flash->qspi->dev;
|
||||
struct stm32_qspi_cmd cmd;
|
||||
|
||||
dev_dbg(dev, "read_reg: cmd:%#.2x buf:%pK len:%#x\n", opcode, buf, len);
|
||||
|
||||
memset(&cmd, 0, sizeof(cmd));
|
||||
cmd.opcode = opcode;
|
||||
cmd.tx_data = true;
|
||||
cmd.len = len;
|
||||
cmd.buf = buf;
|
||||
cmd.qspimode = CCR_FMODE_INDR;
|
||||
|
||||
stm32_qspi_set_framemode(nor, &cmd, false);
|
||||
|
||||
return stm32_qspi_send(flash, &cmd);
|
||||
}
|
||||
|
||||
static int stm32_qspi_write_reg(struct spi_nor *nor, u8 opcode,
|
||||
u8 *buf, int len)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct device *dev = flash->qspi->dev;
|
||||
struct stm32_qspi_cmd cmd;
|
||||
|
||||
dev_dbg(dev, "write_reg: cmd:%#.2x buf:%pK len:%#x\n", opcode, buf, len);
|
||||
|
||||
memset(&cmd, 0, sizeof(cmd));
|
||||
cmd.opcode = opcode;
|
||||
cmd.tx_data = !!(buf && len > 0);
|
||||
cmd.len = len;
|
||||
cmd.buf = buf;
|
||||
cmd.qspimode = CCR_FMODE_INDW;
|
||||
|
||||
stm32_qspi_set_framemode(nor, &cmd, false);
|
||||
|
||||
return stm32_qspi_send(flash, &cmd);
|
||||
}
|
||||
|
||||
static ssize_t stm32_qspi_read(struct spi_nor *nor, loff_t from, size_t len,
|
||||
u_char *buf)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct stm32_qspi *qspi = flash->qspi;
|
||||
struct stm32_qspi_cmd cmd;
|
||||
int err;
|
||||
|
||||
dev_dbg(qspi->dev, "read(%#.2x): buf:%pK from:%#.8x len:%#zx\n",
|
||||
nor->read_opcode, buf, (u32)from, len);
|
||||
|
||||
memset(&cmd, 0, sizeof(cmd));
|
||||
cmd.opcode = nor->read_opcode;
|
||||
cmd.addr_width = nor->addr_width;
|
||||
cmd.addr = (u32)from;
|
||||
cmd.tx_data = true;
|
||||
cmd.dummy = nor->read_dummy;
|
||||
cmd.len = len;
|
||||
cmd.buf = buf;
|
||||
cmd.qspimode = flash->read_mode;
|
||||
|
||||
stm32_qspi_set_framemode(nor, &cmd, true);
|
||||
err = stm32_qspi_send(flash, &cmd);
|
||||
|
||||
return err ? err : len;
|
||||
}
|
||||
|
||||
static ssize_t stm32_qspi_write(struct spi_nor *nor, loff_t to, size_t len,
|
||||
const u_char *buf)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct device *dev = flash->qspi->dev;
|
||||
struct stm32_qspi_cmd cmd;
|
||||
int err;
|
||||
|
||||
dev_dbg(dev, "write(%#.2x): buf:%p to:%#.8x len:%#zx\n",
|
||||
nor->program_opcode, buf, (u32)to, len);
|
||||
|
||||
memset(&cmd, 0, sizeof(cmd));
|
||||
cmd.opcode = nor->program_opcode;
|
||||
cmd.addr_width = nor->addr_width;
|
||||
cmd.addr = (u32)to;
|
||||
cmd.tx_data = true;
|
||||
cmd.len = len;
|
||||
cmd.buf = (void *)buf;
|
||||
cmd.qspimode = CCR_FMODE_INDW;
|
||||
|
||||
stm32_qspi_set_framemode(nor, &cmd, false);
|
||||
err = stm32_qspi_send(flash, &cmd);
|
||||
|
||||
return err ? err : len;
|
||||
}
|
||||
|
||||
static int stm32_qspi_erase(struct spi_nor *nor, loff_t offs)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct device *dev = flash->qspi->dev;
|
||||
struct stm32_qspi_cmd cmd;
|
||||
|
||||
dev_dbg(dev, "erase(%#.2x):offs:%#x\n", nor->erase_opcode, (u32)offs);
|
||||
|
||||
memset(&cmd, 0, sizeof(cmd));
|
||||
cmd.opcode = nor->erase_opcode;
|
||||
cmd.addr_width = nor->addr_width;
|
||||
cmd.addr = (u32)offs;
|
||||
cmd.qspimode = CCR_FMODE_INDW;
|
||||
|
||||
stm32_qspi_set_framemode(nor, &cmd, false);
|
||||
|
||||
return stm32_qspi_send(flash, &cmd);
|
||||
}
|
||||
|
||||
static irqreturn_t stm32_qspi_irq(int irq, void *dev_id)
|
||||
{
|
||||
struct stm32_qspi *qspi = (struct stm32_qspi *)dev_id;
|
||||
u32 cr, sr, fcr = 0;
|
||||
|
||||
cr = readl_relaxed(qspi->io_base + QUADSPI_CR);
|
||||
sr = readl_relaxed(qspi->io_base + QUADSPI_SR);
|
||||
|
||||
if ((cr & CR_TCIE) && (sr & SR_TCF)) {
|
||||
/* tx complete */
|
||||
fcr |= FCR_CTCF;
|
||||
complete(&qspi->cmd_completion);
|
||||
} else {
|
||||
dev_info_ratelimited(qspi->dev, "spurious interrupt\n");
|
||||
}
|
||||
|
||||
writel_relaxed(fcr, qspi->io_base + QUADSPI_FCR);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int stm32_qspi_prep(struct spi_nor *nor, enum spi_nor_ops ops)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct stm32_qspi *qspi = flash->qspi;
|
||||
|
||||
mutex_lock(&qspi->lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stm32_qspi_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
|
||||
{
|
||||
struct stm32_qspi_flash *flash = nor->priv;
|
||||
struct stm32_qspi *qspi = flash->qspi;
|
||||
|
||||
mutex_unlock(&qspi->lock);
|
||||
}
|
||||
|
||||
static int stm32_qspi_flash_setup(struct stm32_qspi *qspi,
|
||||
struct device_node *np)
|
||||
{
|
||||
struct spi_nor_hwcaps hwcaps = {
|
||||
.mask = SNOR_HWCAPS_READ |
|
||||
SNOR_HWCAPS_READ_FAST |
|
||||
SNOR_HWCAPS_PP,
|
||||
};
|
||||
u32 width, presc, cs_num, max_rate = 0;
|
||||
struct stm32_qspi_flash *flash;
|
||||
struct mtd_info *mtd;
|
||||
int ret;
|
||||
|
||||
of_property_read_u32(np, "reg", &cs_num);
|
||||
if (cs_num >= STM32_MAX_NORCHIP)
|
||||
return -EINVAL;
|
||||
|
||||
of_property_read_u32(np, "spi-max-frequency", &max_rate);
|
||||
if (!max_rate)
|
||||
return -EINVAL;
|
||||
|
||||
presc = DIV_ROUND_UP(qspi->clk_rate, max_rate) - 1;
|
||||
|
||||
if (of_property_read_u32(np, "spi-rx-bus-width", &width))
|
||||
width = 1;
|
||||
|
||||
if (width == 4)
|
||||
hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
|
||||
else if (width == 2)
|
||||
hwcaps.mask |= SNOR_HWCAPS_READ_1_1_2;
|
||||
else if (width != 1)
|
||||
return -EINVAL;
|
||||
|
||||
flash = &qspi->flash[cs_num];
|
||||
flash->qspi = qspi;
|
||||
flash->cs = cs_num;
|
||||
flash->presc = presc;
|
||||
|
||||
flash->nor.dev = qspi->dev;
|
||||
spi_nor_set_flash_node(&flash->nor, np);
|
||||
flash->nor.priv = flash;
|
||||
mtd = &flash->nor.mtd;
|
||||
|
||||
flash->nor.read = stm32_qspi_read;
|
||||
flash->nor.write = stm32_qspi_write;
|
||||
flash->nor.erase = stm32_qspi_erase;
|
||||
flash->nor.read_reg = stm32_qspi_read_reg;
|
||||
flash->nor.write_reg = stm32_qspi_write_reg;
|
||||
flash->nor.prepare = stm32_qspi_prep;
|
||||
flash->nor.unprepare = stm32_qspi_unprep;
|
||||
|
||||
writel_relaxed(LPTR_DFT_TIMEOUT, qspi->io_base + QUADSPI_LPTR);
|
||||
|
||||
writel_relaxed(CR_PRESC(presc) | CR_FTHRES(3) | CR_TCEN | CR_SSHIFT
|
||||
| CR_EN, qspi->io_base + QUADSPI_CR);
|
||||
|
||||
/*
|
||||
* in stm32 qspi controller, QUADSPI_DCR register has a fsize field
|
||||
* which define the size of nor flash.
|
||||
* if fsize is NULL, the controller can't sent spi-nor command.
|
||||
* set a temporary value just to discover the nor flash with
|
||||
* "spi_nor_scan". After, the right value (mtd->size) can be set.
|
||||
*/
|
||||
flash->fsize = FSIZE_VAL(SZ_1K);
|
||||
|
||||
ret = spi_nor_scan(&flash->nor, NULL, &hwcaps);
|
||||
if (ret) {
|
||||
dev_err(qspi->dev, "device scan failed\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
flash->fsize = FSIZE_VAL(mtd->size);
|
||||
flash->prefetch_limit = mtd->size - STM32_QSPI_FIFO_SZ;
|
||||
|
||||
flash->read_mode = CCR_FMODE_MM;
|
||||
if (mtd->size > qspi->mm_size)
|
||||
flash->read_mode = CCR_FMODE_INDR;
|
||||
|
||||
writel_relaxed(DCR_CSHT(1), qspi->io_base + QUADSPI_DCR);
|
||||
|
||||
ret = mtd_device_register(mtd, NULL, 0);
|
||||
if (ret) {
|
||||
dev_err(qspi->dev, "mtd device parse failed\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
flash->registered = true;
|
||||
|
||||
dev_dbg(qspi->dev, "read mm:%s cs:%d bus:%d\n",
|
||||
flash->read_mode == CCR_FMODE_MM ? "yes" : "no", cs_num, width);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stm32_qspi_mtd_free(struct stm32_qspi *qspi)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < STM32_MAX_NORCHIP; i++)
|
||||
if (qspi->flash[i].registered)
|
||||
mtd_device_unregister(&qspi->flash[i].nor.mtd);
|
||||
}
|
||||
|
||||
static int stm32_qspi_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *flash_np;
|
||||
struct reset_control *rstc;
|
||||
struct stm32_qspi *qspi;
|
||||
struct resource *res;
|
||||
int ret, irq;
|
||||
|
||||
qspi = devm_kzalloc(dev, sizeof(*qspi), GFP_KERNEL);
|
||||
if (!qspi)
|
||||
return -ENOMEM;
|
||||
|
||||
qspi->nor_num = of_get_child_count(dev->of_node);
|
||||
if (!qspi->nor_num || qspi->nor_num > STM32_MAX_NORCHIP)
|
||||
return -ENODEV;
|
||||
|
||||
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi");
|
||||
qspi->io_base = devm_ioremap_resource(dev, res);
|
||||
if (IS_ERR(qspi->io_base))
|
||||
return PTR_ERR(qspi->io_base);
|
||||
|
||||
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi_mm");
|
||||
qspi->mm_base = devm_ioremap_resource(dev, res);
|
||||
if (IS_ERR(qspi->mm_base))
|
||||
return PTR_ERR(qspi->mm_base);
|
||||
|
||||
qspi->mm_size = resource_size(res);
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
ret = devm_request_irq(dev, irq, stm32_qspi_irq, 0,
|
||||
dev_name(dev), qspi);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to request irq\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
init_completion(&qspi->cmd_completion);
|
||||
|
||||
qspi->clk = devm_clk_get(dev, NULL);
|
||||
if (IS_ERR(qspi->clk))
|
||||
return PTR_ERR(qspi->clk);
|
||||
|
||||
qspi->clk_rate = clk_get_rate(qspi->clk);
|
||||
if (!qspi->clk_rate)
|
||||
return -EINVAL;
|
||||
|
||||
ret = clk_prepare_enable(qspi->clk);
|
||||
if (ret) {
|
||||
dev_err(dev, "can not enable the clock\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
rstc = devm_reset_control_get_exclusive(dev, NULL);
|
||||
if (!IS_ERR(rstc)) {
|
||||
reset_control_assert(rstc);
|
||||
udelay(2);
|
||||
reset_control_deassert(rstc);
|
||||
}
|
||||
|
||||
qspi->dev = dev;
|
||||
platform_set_drvdata(pdev, qspi);
|
||||
mutex_init(&qspi->lock);
|
||||
|
||||
for_each_available_child_of_node(dev->of_node, flash_np) {
|
||||
ret = stm32_qspi_flash_setup(qspi, flash_np);
|
||||
if (ret) {
|
||||
dev_err(dev, "unable to setup flash chip\n");
|
||||
goto err_flash;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_flash:
|
||||
mutex_destroy(&qspi->lock);
|
||||
stm32_qspi_mtd_free(qspi);
|
||||
|
||||
clk_disable_unprepare(qspi->clk);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_qspi_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct stm32_qspi *qspi = platform_get_drvdata(pdev);
|
||||
|
||||
/* disable qspi */
|
||||
writel_relaxed(0, qspi->io_base + QUADSPI_CR);
|
||||
|
||||
stm32_qspi_mtd_free(qspi);
|
||||
mutex_destroy(&qspi->lock);
|
||||
|
||||
clk_disable_unprepare(qspi->clk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id stm32_qspi_match[] = {
|
||||
{.compatible = "st,stm32f469-qspi"},
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, stm32_qspi_match);
|
||||
|
||||
static struct platform_driver stm32_qspi_driver = {
|
||||
.probe = stm32_qspi_probe,
|
||||
.remove = stm32_qspi_remove,
|
||||
.driver = {
|
||||
.name = "stm32-quadspi",
|
||||
.of_match_table = stm32_qspi_match,
|
||||
},
|
||||
};
|
||||
module_platform_driver(stm32_qspi_driver);
|
||||
|
||||
MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>");
|
||||
MODULE_DESCRIPTION("STMicroelectronics STM32 quad spi driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
@ -1,12 +1,9 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* Intel PCH/PCU SPI flash driver.
|
||||
*
|
||||
* Copyright (C) 2016, Intel Corporation
|
||||
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef INTEL_SPI_PDATA_H
|
||||
|
||||
Loading…
Reference in New Issue
Block a user