| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <device/mmio.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ops.h> |
| #include <northbridge/intel/ironlake/ironlake.h> |
| #include <southbridge/intel/ibexpeak/me.h> |
| #include <southbridge/intel/ibexpeak/pch.h> |
| #include <types.h> |
| |
| #define HECIDEV PCI_DEV(0, 0x16, 0) |
| |
| /* FIXME: add timeout. */ |
| static void wait_heci_ready(void) |
| { |
| while (!(read32(DEFAULT_HECIBAR + 0xc) & 8)) // = 0x8000000c |
| ; |
| |
| write32((DEFAULT_HECIBAR + 0x4), (read32(DEFAULT_HECIBAR + 0x4) & ~0x10) | 0xc); |
| } |
| |
| /* FIXME: add timeout. */ |
| static void wait_heci_cb_avail(int len) |
| { |
| union { |
| struct mei_csr csr; |
| u32 raw; |
| } csr; |
| |
| while (!(read32(DEFAULT_HECIBAR + 0xc) & 8)) |
| ; |
| |
| do { |
| csr.raw = read32(DEFAULT_HECIBAR + 0x4); |
| } while (len > csr.csr.buffer_depth - (csr.csr.buffer_write_ptr - |
| csr.csr.buffer_read_ptr)); |
| } |
| |
| static void send_heci_packet_dword(u8 *payload, size_t length) |
| { |
| int i; |
| for (i = 0; i < length; i += sizeof(uint32_t)) { |
| uint32_t dword = 0; |
| size_t bytes = MIN(length - i, sizeof(dword)); |
| memcpy(&dword, payload + i, bytes); |
| write32(DEFAULT_HECIBAR + 0, dword); |
| } |
| } |
| |
| static void send_heci_packet(struct mei_header *head, u8 *payload) |
| { |
| wait_heci_cb_avail(DIV_ROUND_UP(sizeof(*head) + head->length, sizeof(u32))); |
| |
| send_heci_packet_dword((u8 *)head, sizeof(*head)); |
| send_heci_packet_dword(payload, head->length); |
| |
| write32(DEFAULT_HECIBAR + 0x4, read32(DEFAULT_HECIBAR + 0x4) | 0x4); |
| } |
| |
| static void send_heci_message(u8 *msg, int len, u8 hostaddress, u8 clientaddress) |
| { |
| struct mei_header head; |
| int maxlen; |
| |
| wait_heci_ready(); |
| maxlen = (read32(DEFAULT_HECIBAR + 0x4) >> 24) * 4 - 4; |
| |
| while (len) { |
| int cur = len; |
| if (cur > maxlen) { |
| cur = maxlen; |
| head.is_complete = 0; |
| } else |
| head.is_complete = 1; |
| head.length = cur; |
| head.reserved = 0; |
| head.client_address = clientaddress; |
| head.host_address = hostaddress; |
| send_heci_packet(&head, msg); |
| len -= cur; |
| msg += cur; |
| } |
| } |
| |
| /* FIXME: Add timeout. */ |
| static int recv_heci_packet(struct mei_header *head, u32 *packet, u32 *packet_size) |
| { |
| union { |
| struct mei_csr csr; |
| u32 raw; |
| } csr; |
| int i = 0; |
| |
| write32(DEFAULT_HECIBAR + 0x4, read32(DEFAULT_HECIBAR + 0x4) | 2); |
| do { |
| csr.raw = read32(DEFAULT_HECIBAR + 0xc); |
| } while (csr.csr.buffer_write_ptr == csr.csr.buffer_read_ptr); |
| |
| *(u32 *) head = read32(DEFAULT_HECIBAR + 0x8); |
| if (!head->length) { |
| write32(DEFAULT_HECIBAR + 0x4, read32(DEFAULT_HECIBAR + 0x4) | 2); |
| *packet_size = 0; |
| return 0; |
| } |
| if (head->length + 4 > 4 * csr.csr.buffer_depth || head->length > *packet_size) { |
| *packet_size = 0; |
| return -1; |
| } |
| |
| do { |
| csr.raw = read32(DEFAULT_HECIBAR + 0xc); |
| } while (((head->length + 3) >> 2) > |
| (csr.csr.buffer_write_ptr - csr.csr.buffer_read_ptr)); |
| |
| for (i = 0; i < (head->length + 3) >> 2; i++) |
| packet[i++] = read32(DEFAULT_HECIBAR + 0x8); |
| *packet_size = head->length; |
| if (!csr.csr.ready) |
| *packet_size = 0; |
| write32(DEFAULT_HECIBAR + 0x4, read32(DEFAULT_HECIBAR + 0x4) | 4); |
| return 0; |
| } |
| |
| union uma_reply { |
| struct { |
| u8 group_id; |
| u8 command; |
| u8 reserved; |
| u8 result; |
| u8 field2; |
| u8 unk3[0x48 - 4 - 1]; |
| }; |
| u32 dwords[0x48 / sizeof(u32)]; |
| } __packed; |
| |
| /* FIXME: Add timeout. */ |
| static int recv_heci_message(union uma_reply *message, u32 *message_size) |
| { |
| struct mei_header head; |
| int current_position; |
| |
| current_position = 0; |
| while (1) { |
| u32 current_size; |
| current_size = *message_size - current_position; |
| if (recv_heci_packet |
| (&head, &message->dwords[current_position / sizeof(u32)], |
| ¤t_size) == -1) |
| break; |
| if (!current_size) |
| break; |
| current_position += current_size; |
| if (head.is_complete) { |
| *message_size = current_position; |
| return 0; |
| } |
| |
| if (current_position >= *message_size) |
| break; |
| } |
| *message_size = 0; |
| return -1; |
| } |
| |
| static void send_heci_uma_message(const u64 heci_uma_addr, const unsigned int heci_uma_size) |
| { |
| union uma_reply reply; |
| |
| struct uma_message { |
| u8 group_id; |
| u8 cmd; |
| u8 reserved; |
| u8 result; |
| u32 c2; |
| u64 heci_uma_addr; |
| u32 heci_uma_size; |
| u16 c3; |
| } __packed msg = { |
| .group_id = 0, |
| .cmd = MKHI_SET_UMA, |
| .reserved = 0, |
| .result = 0, |
| .c2 = 0x82, |
| .heci_uma_addr = heci_uma_addr, |
| .heci_uma_size = heci_uma_size, |
| .c3 = 0, |
| }; |
| u32 reply_size; |
| |
| send_heci_message((u8 *) &msg, sizeof(msg), 0, 7); |
| |
| reply_size = sizeof(reply); |
| if (recv_heci_message(&reply, &reply_size) == -1) |
| return; |
| |
| if (reply.command != (MKHI_SET_UMA | (1 << 7))) |
| die("HECI init failed\n"); |
| } |
| |
| void setup_heci_uma(u64 heci_uma_addr, unsigned int heci_uma_size) |
| { |
| if (!heci_uma_size && !(pci_read_config32(HECIDEV, 0x40) & 0x20)) |
| return; |
| |
| if (heci_uma_size) { |
| dmibar_clrbits32(DMIVC0RCTL, 1 << 7); |
| RCBA32(0x14) &= ~0x80; |
| dmibar_clrbits32(DMIVC1RCTL, 1 << 7); |
| RCBA32(0x20) &= ~0x80; |
| dmibar_clrbits32(DMIVCPRCTL, 1 << 7); |
| RCBA32(0x30) &= ~0x80; |
| dmibar_clrbits32(DMIVCMRCTL, 1 << 7); |
| RCBA32(0x40) &= ~0x80; |
| |
| RCBA32(0x40) = 0x87000080; // OK |
| dmibar_write32(DMIVCMRCTL, 0x87000080); // OK |
| |
| while ((RCBA16(0x46) & 2) && dmibar_read16(DMIVCMRSTS) & VCMNP) |
| ; |
| } |
| |
| mchbar_write32(0x24, 0x10000 + heci_uma_size); |
| |
| send_heci_uma_message(heci_uma_addr, heci_uma_size); |
| |
| pci_write_config32(HECIDEV, 0x10, 0x0); |
| pci_write_config8(HECIDEV, 0x4, 0x0); |
| } |