Shad Ansari | 2f7f9be | 2017-06-07 13:34:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | <:copyright-BRCM:2016:DUAL/GPL:standard |
| 3 | |
| 4 | Broadcom Proprietary and Confidential.(c) 2016 Broadcom |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Unless you and Broadcom execute a separate written software license |
| 8 | agreement governing use of this software, this software is licensed |
| 9 | to you under the terms of the GNU General Public License version 2 |
| 10 | (the "GPL"), available at http://www.broadcom.com/licenses/GPLv2.php, |
| 11 | with the following added to such license: |
| 12 | |
| 13 | As a special exception, the copyright holders of this software give |
| 14 | you permission to link this software with independent modules, and |
| 15 | to copy and distribute the resulting executable under terms of your |
| 16 | choice, provided that you also meet, for each linked independent |
| 17 | module, the terms and conditions of the license of that module. |
| 18 | An independent module is a module which is not derived from this |
| 19 | software. The special exception does not apply to any modifications |
| 20 | of the software. |
| 21 | |
| 22 | Not withstanding the above, under no circumstances may you combine |
| 23 | this software in any way with any other Broadcom software provided |
| 24 | under a license other than the GPL, without Broadcom's express prior |
| 25 | written consent. |
| 26 | |
| 27 | :> |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * bcmolt_board_selector.c |
| 32 | */ |
| 33 | |
| 34 | #include <linux/fs.h> |
| 35 | #include "bcmolt_board_selector.h" |
| 36 | |
| 37 | static bus_devfn_devid bus_devfn_devid_table_svk4[] = { |
| 38 | { 5, 0, 0}, |
| 39 | { 3, 0, 1}, |
| 40 | {-1,-1,-1}, |
| 41 | }; |
| 42 | |
| 43 | static bus_devfn_devid bus_devfn_devid_table_svk1_3[] = { |
| 44 | { 3, 0, 0}, |
| 45 | {-1,-1,-1}, |
| 46 | }; |
| 47 | |
| 48 | #define SVK4_IDENT_FILE "/etc/svk4" |
| 49 | |
| 50 | #define PCIE_DEVICE_RESCAN_FILE_SVK4 "/sys/bus/pci/devices/0000:02:00.0/rescan" |
| 51 | #define PCIE_DEVICE_RESCAN_FILE_SVK1_3 "/sys/bus/pci/devices/0000:02:01.0/rescan" |
| 52 | |
| 53 | /* Minimum required FPGA version for standalone mode (host / embedded processors running disconnected). */ |
| 54 | #define FPGA_VER_FOR_STANDALONE 7 |
| 55 | |
| 56 | static struct file *file_open(const char *path, int flags) |
| 57 | { |
| 58 | struct file *fd = NULL; |
| 59 | mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; |
| 60 | |
| 61 | fd = filp_open(path, flags, mode); |
| 62 | if(IS_ERR(fd)) |
| 63 | return NULL; |
| 64 | return fd; |
| 65 | } |
| 66 | |
| 67 | static void file_close(struct file *file) |
| 68 | { |
| 69 | filp_close(file, NULL); |
| 70 | } |
| 71 | |
| 72 | static bcmos_bool can_read_file(const char *path) |
| 73 | { |
| 74 | struct file *fd = file_open(path, O_RDONLY); |
| 75 | if ((fd == NULL) || (fd == (void *)-ENOENT)) /* -ENOENT; No such file or directory */ |
| 76 | { |
| 77 | return BCMOS_FALSE; |
| 78 | } |
| 79 | |
| 80 | file_close(fd); |
| 81 | return BCMOS_TRUE; |
| 82 | } |
| 83 | |
| 84 | static bcmos_bool board_is_svk4(void) |
| 85 | { |
| 86 | return can_read_file(SVK4_IDENT_FILE); |
| 87 | } |
| 88 | |
| 89 | /* Get PCI rescan string. It is used in linux to rescan PCIe bus */ |
| 90 | const char *bcmolt_board_pci_rescan_string_get(void) |
| 91 | { |
| 92 | return board_is_svk4() ? PCIE_DEVICE_RESCAN_FILE_SVK4 : PCIE_DEVICE_RESCAN_FILE_SVK1_3; |
| 93 | } |
| 94 | |
| 95 | /* Get bus, devfn --> dev_id mapping table. |
| 96 | * The table is terminated by row with bus=-1,devfn=-1 |
| 97 | */ |
| 98 | const bus_devfn_devid *bcmolt_board_pci_map_table_get(void) |
| 99 | { |
| 100 | return board_is_svk4() ? bus_devfn_devid_table_svk4 : bus_devfn_devid_table_svk1_3; |
| 101 | } |
| 102 | |
| 103 | /* Return TRUE if board supports Maple-standalone mode */ |
| 104 | bcmos_bool bcmolt_board_supports_standalone(uint32_t version) |
| 105 | { |
| 106 | return board_is_svk4() || version >= FPGA_VER_FOR_STANDALONE; |
| 107 | } |
| 108 | |
| 109 | /* Returns number of maple devices on the board */ |
| 110 | uint8_t bcmolt_board_num_maple_devices(void) |
| 111 | { |
| 112 | return board_is_svk4() ? 2 : 1; |
| 113 | } |