Angel Pons | 8a3453f | 2020-04-02 23:48:19 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 2 | |
| 3 | #include <stdint.h> |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 4 | #include <stddef.h> |
Kyösti Mälkki | f1b58b7 | 2019-03-01 13:43:02 +0200 | [diff] [blame] | 5 | #include <device/pci_ops.h> |
Kyösti Mälkki | 1d7541f | 2014-02-17 21:34:42 +0200 | [diff] [blame] | 6 | #include <console/uart.h> |
Kyösti Mälkki | bbf6f3d | 2014-03-15 01:32:55 +0200 | [diff] [blame] | 7 | #include <device/pci.h> |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 8 | |
Arthur Heymans | 5fadb46 | 2019-11-20 21:28:15 +0100 | [diff] [blame] | 9 | static unsigned int oxpcie_present; |
Aaron Durbin | e4d7abc | 2017-04-16 22:05:36 -0500 | [diff] [blame] | 10 | static DEVTREE_CONST u32 uart0_base = CONFIG_EARLY_PCI_MMIO_BASE + 0x1000; |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 11 | |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 12 | int pci_early_device_probe(u8 bus, u8 dev, u32 mmio_base) |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 13 | { |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 14 | pci_devfn_t device = PCI_DEV(bus, dev, 0); |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 15 | |
Kyösti Mälkki | e088721 | 2019-09-26 22:33:51 +0300 | [diff] [blame] | 16 | u32 id = pci_s_read_config32(device, PCI_VENDOR_ID); |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 17 | switch (id) { |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 18 | case 0xc1181415: /* e.g. Startech PEX1S1PMINI function 0 */ |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 19 | /* On this device function 0 is the parallel port, and |
| 20 | * function 3 is the serial port. So let's go look for |
| 21 | * the UART. |
| 22 | */ |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 23 | device = PCI_DEV(bus, dev, 3); |
Kyösti Mälkki | e088721 | 2019-09-26 22:33:51 +0300 | [diff] [blame] | 24 | id = pci_s_read_config32(device, PCI_VENDOR_ID); |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 25 | if (id != 0xc11b1415) |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 26 | return -1; |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 27 | break; |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 28 | case 0xc11b1415: /* e.g. Startech PEX1S1PMINI function 3 */ |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 29 | case 0xc1581415: /* e.g. Startech MPEX2S952 */ |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 30 | break; |
Gabe Black | 4d04a71 | 2011-10-05 01:52:08 -0700 | [diff] [blame] | 31 | default: |
| 32 | /* No UART here. */ |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 33 | return -1; |
Stefan Reinauer | a6087d1 | 2011-05-09 15:19:29 -0700 | [diff] [blame] | 34 | } |
| 35 | |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 36 | /* Sanity-check, we assume fixed location. */ |
| 37 | if (mmio_base != CONFIG_EARLY_PCI_MMIO_BASE) |
| 38 | return -1; |
| 39 | |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 40 | /* Setup base address on device */ |
Kyösti Mälkki | e088721 | 2019-09-26 22:33:51 +0300 | [diff] [blame] | 41 | pci_s_write_config32(device, PCI_BASE_ADDRESS_0, mmio_base); |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 42 | |
| 43 | /* Enable memory on device */ |
Kyösti Mälkki | e088721 | 2019-09-26 22:33:51 +0300 | [diff] [blame] | 44 | u16 reg16 = pci_s_read_config16(device, PCI_COMMAND); |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 45 | reg16 |= PCI_COMMAND_MEMORY; |
Kyösti Mälkki | e088721 | 2019-09-26 22:33:51 +0300 | [diff] [blame] | 46 | pci_s_write_config16(device, PCI_COMMAND, reg16); |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 47 | |
Arthur Heymans | 5fadb46 | 2019-11-20 21:28:15 +0100 | [diff] [blame] | 48 | oxpcie_present = 1; |
Kyösti Mälkki | 4c686f2 | 2014-02-14 12:45:09 +0200 | [diff] [blame] | 49 | return 0; |
Stefan Reinauer | 4885daa | 2011-04-26 23:47:04 +0000 | [diff] [blame] | 50 | } |
| 51 | |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 52 | static int oxpcie_uart_active(void) |
| 53 | { |
Arthur Heymans | 5fadb46 | 2019-11-20 21:28:15 +0100 | [diff] [blame] | 54 | return oxpcie_present; |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 55 | } |
| 56 | |
Felix Held | e3a1247 | 2020-09-11 15:47:09 +0200 | [diff] [blame] | 57 | uintptr_t uart_platform_base(unsigned int idx) |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 58 | { |
Felix Held | e3a1247 | 2020-09-11 15:47:09 +0200 | [diff] [blame] | 59 | if ((idx < 8) && oxpcie_uart_active()) |
Kyösti Mälkki | e993ec7 | 2015-03-20 08:51:57 +0200 | [diff] [blame] | 60 | return uart0_base + idx * 0x200; |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 61 | return 0; |
| 62 | } |
| 63 | |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 64 | void oxford_remap(u32 new_base) |
| 65 | { |
Kyösti Mälkki | fb25f9f | 2018-12-26 20:15:58 +0200 | [diff] [blame] | 66 | #if ENV_RAMSTAGE |
Kyösti Mälkki | 2b95da0 | 2014-02-15 10:19:23 +0200 | [diff] [blame] | 67 | uart0_base = new_base + 0x1000; |
Gabe Black | 4d04a71 | 2011-10-05 01:52:08 -0700 | [diff] [blame] | 68 | #endif |
Kyösti Mälkki | fb25f9f | 2018-12-26 20:15:58 +0200 | [diff] [blame] | 69 | } |
Kyösti Mälkki | 3ee1668 | 2014-02-17 19:37:52 +0200 | [diff] [blame] | 70 | |
| 71 | unsigned int uart_platform_refclk(void) |
| 72 | { |
| 73 | return 62500000; |
| 74 | } |