diff options
Diffstat (limited to 'drivers/mtd/nand/raw/denali_pci.c')
| -rw-r--r-- | drivers/mtd/nand/raw/denali_pci.c | 132 |
1 files changed, 132 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..7c8efc4c7 --- /dev/null +++ b/drivers/mtd/nand/raw/denali_pci.c @@ -0,0 +1,132 @@ +/* + * NAND Flash Controller Device Driver + * Copyright © 2009-2010, Intel Corporation and its suppliers. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + */ + +#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) +{ + int ret; + resource_size_t csr_base, mem_base; + unsigned long csr_len, mem_len; + struct denali_nand_info *denali; + + 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->nand.ecc.options |= NAND_ECC_MAXIMIZE; + 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 = ioremap_nocache(csr_base, csr_len); + if (!denali->reg) { + dev_err(&dev->dev, "Spectra: Unable to remap memory region\n"); + return -ENOMEM; + } + + denali->host = ioremap_nocache(mem_base, mem_len); + if (!denali->host) { + dev_err(&dev->dev, "Spectra: ioremap_nocache failed!"); + ret = -ENOMEM; + goto failed_remap_reg; + } + + ret = denali_init(denali); + if (ret) + goto failed_remap_mem; + + pci_set_drvdata(dev, denali); + + return 0; + +failed_remap_mem: + iounmap(denali->host); +failed_remap_reg: + iounmap(denali->reg); + return ret; +} + +static void denali_pci_remove(struct pci_dev *dev) +{ + struct denali_nand_info *denali = pci_get_drvdata(dev); + + denali_remove(denali); + iounmap(denali->reg); + iounmap(denali->host); +} + +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"); |