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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4438 | trochtova | 1 | #include <ddi.h> |
| 2 | #include <libarch/ddi.h> |
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| 3 | #include <futex.h> |
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| 4 | |||
| 5 | #include "pci.h" |
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| 6 | #include "pci_bus.h" |
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| 7 | #include "pci_conf.h" |
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| 8 | |||
| 9 | #define CONF_ADDR_PORT 0xCF8 |
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| 10 | #define CONF_DATA_PORT 0xCFC |
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| 11 | #define CONF_PORT_SIZE 4 |
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| 12 | |||
| 13 | static void *conf_addr_port = NULL; |
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| 14 | static void *conf_data_port = NULL; |
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| 15 | |||
| 16 | static atomic_t pci_conf_futex = FUTEX_INITIALIZER; |
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| 17 | |||
| 18 | static void method1_conf_read(pci_dev_t *d, int reg, uint8_t *buf, int len); |
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| 19 | |||
| 20 | #define CONF_ADDR(bus, dev, fn, reg) ((1 << 31) | (bus << 16) | (dev << 11) | (fn << 8) | (reg & ~3)) |
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| 21 | |||
| 22 | uint8_t pci_conf_read_8(pci_dev_t *dev, int reg) |
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| 23 | { |
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| 24 | uint8_t res; |
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| 25 | method1_conf_read(dev, reg, &res, 1); |
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| 26 | return res; |
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| 27 | } |
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| 28 | |||
| 29 | uint16_t pci_conf_read_16(pci_dev_t *dev, int reg) |
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| 30 | { |
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| 31 | uint16_t res; |
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| 32 | method1_conf_read(dev, reg, (uint8_t *)&res, 2); |
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| 33 | return res; |
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| 34 | } |
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| 35 | |||
| 36 | uint32_t pci_conf_read_32(pci_dev_t *dev, int reg) |
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| 37 | { |
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| 38 | uint32_t res; |
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| 39 | method1_conf_read(dev, reg, (uint8_t *)&res, 4); |
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| 40 | return res; |
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| 41 | } |
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| 42 | |||
| 43 | static void method1_conf_read(pci_dev_t *dev, int reg, uint8_t *buf, int len) |
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| 44 | { |
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| 45 | futex_down(&pci_conf_futex); |
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| 46 | uint32_t conf_addr = CONF_ADDR(dev->bus->num, dev->dev, dev->fn, reg); |
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| 47 | void *addr = conf_data_port + (reg & 3); |
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| 48 | |||
| 49 | pio_write_32(conf_addr_port, conf_addr); |
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| 50 | |||
| 51 | switch (len) { |
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| 52 | case 1: |
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| 53 | buf[0] = pio_read_8(addr); |
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| 54 | break; |
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| 55 | case 2: |
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| 56 | ((uint16_t *)buf)[0] = pio_read_16(addr); |
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| 57 | break; |
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| 58 | case 4: |
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| 59 | ((uint32_t *)buf)[0] = pio_read_32(addr); |
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| 60 | break; |
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| 61 | } |
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| 62 | |||
| 63 | futex_up(&pci_conf_futex); |
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| 64 | } |
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| 65 | |||
| 66 | int pci_bus_init() |
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| 67 | { |
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| 68 | int error; |
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| 69 | if (error = pio_enable((void *)CONF_ADDR_PORT, CONF_PORT_SIZE, &conf_addr_port)) { |
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| 70 | printf("PCI: failed to enable configuration address port (error %d)\n", error); |
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| 71 | return 0; |
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| 72 | } |
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| 73 | |||
| 74 | if (error = pio_enable((void *)CONF_DATA_PORT, CONF_PORT_SIZE, &conf_data_port)) { |
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| 75 | printf("PCI: failed to enable configuration data port (error %d)\n", error); |
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| 76 | return 0; |
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| 77 | } |
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| 78 | |||
| 79 | pci_bus_t *bus = pci_alloc_bus(); |
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| 80 | bus->data = NULL; |
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| 81 | bus->num = 0; |
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| 82 | pci_bus_register(bus); |
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| 83 | pci_bus_scan(bus); |
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| 84 | return 1; |
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| 85 | } |
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| 86 | |||
| 87 | void pci_bus_clean() |
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| 88 | { |
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| 89 | } |
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| 90 | |||
| 91 | /* pci bus structure initialization */ |
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| 92 | void pci_init_bus_data(pci_bus_t *bus, pci_bus_t *parent) |
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| 93 | { |
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| 94 | bus->data = NULL; |
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| 95 | } |