diff options
Diffstat (limited to 'drivers/mtd/nand/raw/denali_pci.c')
| -rw-r--r-- | drivers/mtd/nand/raw/denali_pci.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/denali_pci.c b/drivers/mtd/nand/raw/denali_pci.c new file mode 100644 index 000000000..de7e722d3 --- /dev/null +++ b/drivers/mtd/nand/raw/denali_pci.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NAND Flash Controller Device Driver + * Copyright © 2009-2010, Intel Corporation and its suppliers. + */ + +#include <linux/errno.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> + +#include "denali.h" + +#define DENALI_NAND_NAME "denali-nand-pci" + +#define INTEL_CE4100 1 +#define INTEL_MRST 2 + +/* List of platforms this NAND controller has be integrated into */ +static const struct pci_device_id denali_pci_ids[] = { + { PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 }, + { PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST }, + { /* end: all zeroes */ } +}; +MODULE_DEVICE_TABLE(pci, denali_pci_ids); + +NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15); + +static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + resource_size_t csr_base, mem_base; + unsigned long csr_len, mem_len; + struct denali_controller *denali; + struct denali_chip *dchip; + int nsels, ret, i; + + denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL); + if (!denali) + return -ENOMEM; + + ret = pcim_enable_device(dev); + if (ret) { + dev_err(&dev->dev, "Spectra: pci_enable_device failed.\n"); + return ret; + } + + if (id->driver_data == INTEL_CE4100) { + mem_base = pci_resource_start(dev, 0); + mem_len = pci_resource_len(dev, 1); + csr_base = pci_resource_start(dev, 1); + csr_len = pci_resource_len(dev, 1); + } else { + csr_base = pci_resource_start(dev, 0); + csr_len = pci_resource_len(dev, 0); + mem_base = pci_resource_start(dev, 1); + mem_len = pci_resource_len(dev, 1); + if (!mem_len) { + mem_base = csr_base + csr_len; + mem_len = csr_len; + } + } + + pci_set_master(dev); + denali->dev = &dev->dev; + denali->irq = dev->irq; + denali->ecc_caps = &denali_pci_ecc_caps; + denali->clk_rate = 50000000; /* 50 MHz */ + denali->clk_x_rate = 200000000; /* 200 MHz */ + + ret = pci_request_regions(dev, DENALI_NAND_NAME); + if (ret) { + dev_err(&dev->dev, "Spectra: Unable to request memory regions\n"); + return ret; + } + + denali->reg = devm_ioremap(denali->dev, csr_base, csr_len); + if (!denali->reg) { + dev_err(&dev->dev, "Spectra: Unable to remap memory region\n"); + return -ENOMEM; + } + + denali->host = devm_ioremap(denali->dev, mem_base, mem_len); + if (!denali->host) { + dev_err(&dev->dev, "Spectra: ioremap failed!"); + return -ENOMEM; + } + + ret = denali_init(denali); + if (ret) + return ret; + + nsels = denali->nbanks; + + dchip = devm_kzalloc(denali->dev, struct_size(dchip, sels, nsels), + GFP_KERNEL); + if (!dchip) { + ret = -ENOMEM; + goto out_remove_denali; + } + + dchip->chip.base.ecc.user_conf.flags |= NAND_ECC_MAXIMIZE_STRENGTH; + + dchip->nsels = nsels; + + for (i = 0; i < nsels; i++) + dchip->sels[i].bank = i; + + ret = denali_chip_init(denali, dchip); + if (ret) + goto out_remove_denali; + + pci_set_drvdata(dev, denali); + + return 0; + +out_remove_denali: + denali_remove(denali); + return ret; +} + +static void denali_pci_remove(struct pci_dev *dev) +{ + struct denali_controller *denali = pci_get_drvdata(dev); + + denali_remove(denali); +} + +static struct pci_driver denali_pci_driver = { + .name = DENALI_NAND_NAME, + .id_table = denali_pci_ids, + .probe = denali_pci_probe, + .remove = denali_pci_remove, +}; +module_pci_driver(denali_pci_driver); + +MODULE_DESCRIPTION("PCI driver for Denali NAND controller"); +MODULE_AUTHOR("Intel Corporation and its suppliers"); +MODULE_LICENSE("GPL v2"); |