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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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d8e8fd0ebf
Currently, this driver sticks to the legacy NAND model because it was
upstreamed before commit 2d472aba15 ("mtd: nand: document the NAND
controller/NAND chip DT representation"). However, relying on the
dummy_controller is already deprecated.
Switch over to the new controller/chip representation.
The struct denali_nand_info has been split into denali_controller
and denali_chip, to contain the controller data, per-chip data,
respectively.
One problem is, this commit changes the DT binding. So, as always,
the backward compatibility must be taken into consideration.
In the new binding, the controller node expects
#address-cells = <1>;
#size-cells = <0>;
... since the child nodes represent NAND chips.
In the old binding, the controller node may have subnodes, but they
are MTD partitions.
The denali_dt_is_legacy_binding() exploits it to distinguish old/new
platforms.
Going forward, the old binding is only allowed for existing DT files.
I updated the binding document.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* NAND Flash Controller Device Driver
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* Copyright © 2009-2010, Intel Corporation and its suppliers.
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*/
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#include <linux/errno.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "denali.h"
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#define DENALI_NAND_NAME "denali-nand-pci"
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#define INTEL_CE4100 1
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#define INTEL_MRST 2
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/* List of platforms this NAND controller has be integrated into */
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static const struct pci_device_id denali_pci_ids[] = {
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{ PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 },
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{ PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST },
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{ /* end: all zeroes */ }
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};
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MODULE_DEVICE_TABLE(pci, denali_pci_ids);
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NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15);
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static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
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{
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resource_size_t csr_base, mem_base;
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unsigned long csr_len, mem_len;
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struct denali_controller *denali;
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struct denali_chip *dchip;
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int nsels, ret, i;
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denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL);
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if (!denali)
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return -ENOMEM;
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ret = pcim_enable_device(dev);
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if (ret) {
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dev_err(&dev->dev, "Spectra: pci_enable_device failed.\n");
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return ret;
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}
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if (id->driver_data == INTEL_CE4100) {
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mem_base = pci_resource_start(dev, 0);
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mem_len = pci_resource_len(dev, 1);
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csr_base = pci_resource_start(dev, 1);
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csr_len = pci_resource_len(dev, 1);
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} else {
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csr_base = pci_resource_start(dev, 0);
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csr_len = pci_resource_len(dev, 0);
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mem_base = pci_resource_start(dev, 1);
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mem_len = pci_resource_len(dev, 1);
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if (!mem_len) {
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mem_base = csr_base + csr_len;
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mem_len = csr_len;
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}
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}
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pci_set_master(dev);
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denali->dev = &dev->dev;
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denali->irq = dev->irq;
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denali->ecc_caps = &denali_pci_ecc_caps;
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denali->clk_rate = 50000000; /* 50 MHz */
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denali->clk_x_rate = 200000000; /* 200 MHz */
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ret = pci_request_regions(dev, DENALI_NAND_NAME);
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if (ret) {
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dev_err(&dev->dev, "Spectra: Unable to request memory regions\n");
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return ret;
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}
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denali->reg = ioremap_nocache(csr_base, csr_len);
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if (!denali->reg) {
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dev_err(&dev->dev, "Spectra: Unable to remap memory region\n");
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return -ENOMEM;
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}
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denali->host = ioremap_nocache(mem_base, mem_len);
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if (!denali->host) {
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dev_err(&dev->dev, "Spectra: ioremap_nocache failed!");
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ret = -ENOMEM;
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goto out_unmap_reg;
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}
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ret = denali_init(denali);
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if (ret)
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goto out_unmap_host;
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nsels = denali->nbanks;
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dchip = devm_kzalloc(denali->dev, struct_size(dchip, sels, nsels),
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GFP_KERNEL);
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if (!dchip) {
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ret = -ENOMEM;
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goto out_remove_denali;
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}
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dchip->chip.ecc.options |= NAND_ECC_MAXIMIZE;
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dchip->nsels = nsels;
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for (i = 0; i < nsels; i++)
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dchip->sels[i].bank = i;
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ret = denali_chip_init(denali, dchip);
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if (ret)
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goto out_remove_denali;
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pci_set_drvdata(dev, denali);
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return 0;
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out_remove_denali:
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denali_remove(denali);
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out_unmap_host:
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iounmap(denali->host);
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out_unmap_reg:
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iounmap(denali->reg);
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return ret;
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}
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static void denali_pci_remove(struct pci_dev *dev)
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{
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struct denali_controller *denali = pci_get_drvdata(dev);
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denali_remove(denali);
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iounmap(denali->reg);
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iounmap(denali->host);
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}
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static struct pci_driver denali_pci_driver = {
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.name = DENALI_NAND_NAME,
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.id_table = denali_pci_ids,
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.probe = denali_pci_probe,
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.remove = denali_pci_remove,
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};
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module_pci_driver(denali_pci_driver);
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MODULE_DESCRIPTION("PCI driver for Denali NAND controller");
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MODULE_AUTHOR("Intel Corporation and its suppliers");
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MODULE_LICENSE("GPL v2");
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