2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
25 /* probe_roms - scan for oem parameters */
27 #include <linux/kernel.h>
28 #include <linux/firmware.h>
29 #include <linux/uaccess.h>
30 #include <linux/efi.h>
31 #include <asm/probe_roms.h>
35 #include "probe_roms.h"
37 static efi_char16_t isci_efivar_name[] = {
38 'R', 's', 't', 'S', 'c', 'u', 'O'
41 struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
43 void __iomem *oprom = pci_map_biosrom(pdev);
44 struct isci_orom *rom = NULL;
48 struct isci_oem_hdr oem_hdr;
54 len = pci_biosrom_size(pdev);
55 rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
58 "Unable to allocate memory for orom\n");
62 for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) {
63 memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE);
65 /* we think we found the OEM table */
66 if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) {
69 memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr));
71 copy_len = min(oem_hdr.len - sizeof(oem_hdr),
75 oprom + i + sizeof(oem_hdr),
78 /* calculate checksum */
80 for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++)
84 for (j = 0; j < sizeof(*rom); j++, tmp++)
89 "OEM table checksum failed\n");
93 /* keep going if that's not the oem param table */
94 if (memcmp(rom->hdr.signature,
96 ISCI_ROM_SIG_SIZE) != 0)
100 "OEM parameter table found in OROM\n");
106 dev_err(&pdev->dev, "oprom parse error\n");
109 pci_unmap_biosrom(oprom);
114 struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw)
116 struct isci_orom *orom = NULL, *data;
119 if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0)
122 if (fw->size < sizeof(*orom))
125 data = (struct isci_orom *)fw->data;
127 if (strncmp(ISCI_ROM_SIG, data->hdr.signature,
128 strlen(ISCI_ROM_SIG)) != 0)
131 orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL);
135 memcpy(orom, fw->data, fw->size);
137 if (is_c0(pdev) || is_c1(pdev))
141 * deprecated: override default amp_control for pre-preproduction
144 for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++)
145 for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) {
146 orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03;
147 orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03;
148 orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03;
149 orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03;
152 release_firmware(fw);
157 static struct efi *get_efi(void)
166 struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
169 struct isci_orom *rom;
170 struct isci_oem_hdr *oem_hdr;
173 unsigned long data_len;
178 efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL);
181 "Unable to allocate memory for EFI data\n");
185 rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr));
188 status = get_efi()->get_variable(isci_efivar_name,
189 &ISCI_EFI_VENDOR_GUID,
194 status = EFI_NOT_FOUND;
196 if (status != EFI_SUCCESS) {
198 "Unable to obtain EFI var data for OEM parms\n");
202 oem_hdr = (struct isci_oem_hdr *)efi_data;
204 if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) {
206 "Invalid OEM header signature\n");
210 /* calculate checksum */
211 tmp = (u8 *)efi_data;
212 for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++)
217 "OEM table checksum failed\n");
221 if (memcmp(rom->hdr.signature,
223 ISCI_ROM_SIG_SIZE) != 0) {
225 "Invalid OEM table signature\n");