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");
107 devm_kfree(&pdev->dev, rom);
110 pci_unmap_biosrom(oprom);
115 enum sci_status isci_parse_oem_parameters(struct sci_oem_params *oem,
116 struct isci_orom *orom, int scu_index)
118 /* check for valid inputs */
119 if (scu_index < 0 || scu_index >= SCI_MAX_CONTROLLERS ||
120 scu_index > orom->hdr.num_elements || !oem)
123 *oem = orom->ctrl[scu_index];
127 struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw)
129 struct isci_orom *orom = NULL, *data;
132 if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0)
135 if (fw->size < sizeof(*orom))
138 data = (struct isci_orom *)fw->data;
140 if (strncmp(ISCI_ROM_SIG, data->hdr.signature,
141 strlen(ISCI_ROM_SIG)) != 0)
144 orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL);
148 memcpy(orom, fw->data, fw->size);
154 * deprecated: override default amp_control for pre-preproduction
157 for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++)
158 for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) {
159 orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03;
160 orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03;
161 orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03;
162 orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03;
165 release_firmware(fw);
170 static struct efi *get_efi(void)
179 struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
182 struct isci_orom *rom;
183 struct isci_oem_hdr *oem_hdr;
186 unsigned long data_len;
191 efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL);
194 "Unable to allocate memory for EFI data\n");
198 rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr));
201 status = get_efi()->get_variable(isci_efivar_name,
202 &ISCI_EFI_VENDOR_GUID,
207 status = EFI_NOT_FOUND;
209 if (status != EFI_SUCCESS) {
211 "Unable to obtain EFI var data for OEM parms\n");
215 oem_hdr = (struct isci_oem_hdr *)efi_data;
217 if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) {
219 "Invalid OEM header signature\n");
223 /* calculate checksum */
224 tmp = (u8 *)efi_data;
225 for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++)
230 "OEM table checksum failed\n");
234 if (memcmp(rom->hdr.signature,
236 ISCI_ROM_SIG_SIZE) != 0) {
238 "Invalid OEM table signature\n");